1 /*
2 * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "asm/assembler.hpp"
27 #include "asm/assembler.inline.hpp"
28 #include "code/compiledIC.hpp"
29 #include "compiler/compiler_globals.hpp"
30 #include "compiler/disassembler.hpp"
31 #include "crc32c.h"
32 #include "gc/shared/barrierSet.hpp"
33 #include "gc/shared/barrierSetAssembler.hpp"
34 #include "gc/shared/collectedHeap.inline.hpp"
35 #include "gc/shared/tlab_globals.hpp"
36 #include "interpreter/bytecodeHistogram.hpp"
37 #include "interpreter/interpreter.hpp"
38 #include "jvm.h"
39 #include "memory/resourceArea.hpp"
40 #include "memory/universe.hpp"
41 #include "oops/accessDecorators.hpp"
42 #include "oops/compressedKlass.inline.hpp"
43 #include "oops/compressedOops.inline.hpp"
44 #include "oops/klass.inline.hpp"
45 #include "prims/methodHandles.hpp"
46 #include "runtime/continuation.hpp"
47 #include "runtime/interfaceSupport.inline.hpp"
48 #include "runtime/javaThread.hpp"
49 #include "runtime/jniHandles.hpp"
50 #include "runtime/objectMonitor.hpp"
51 #include "runtime/os.hpp"
52 #include "runtime/safepoint.hpp"
53 #include "runtime/safepointMechanism.hpp"
54 #include "runtime/sharedRuntime.hpp"
55 #include "runtime/stubRoutines.hpp"
56 #include "utilities/checkedCast.hpp"
57 #include "utilities/macros.hpp"
58
59 #ifdef PRODUCT
60 #define BLOCK_COMMENT(str) /* nothing */
61 #define STOP(error) stop(error)
62 #else
63 #define BLOCK_COMMENT(str) block_comment(str)
64 #define STOP(error) block_comment(error); stop(error)
65 #endif
66
67 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
68
69 #ifdef ASSERT
70 bool AbstractAssembler::pd_check_instruction_mark() { return true; }
71 #endif
72
73 static const Assembler::Condition reverse[] = {
74 Assembler::noOverflow /* overflow = 0x0 */ ,
75 Assembler::overflow /* noOverflow = 0x1 */ ,
76 Assembler::aboveEqual /* carrySet = 0x2, below = 0x2 */ ,
77 Assembler::below /* aboveEqual = 0x3, carryClear = 0x3 */ ,
78 Assembler::notZero /* zero = 0x4, equal = 0x4 */ ,
79 Assembler::zero /* notZero = 0x5, notEqual = 0x5 */ ,
80 Assembler::above /* belowEqual = 0x6 */ ,
81 Assembler::belowEqual /* above = 0x7 */ ,
82 Assembler::positive /* negative = 0x8 */ ,
83 Assembler::negative /* positive = 0x9 */ ,
84 Assembler::noParity /* parity = 0xa */ ,
85 Assembler::parity /* noParity = 0xb */ ,
86 Assembler::greaterEqual /* less = 0xc */ ,
87 Assembler::less /* greaterEqual = 0xd */ ,
88 Assembler::greater /* lessEqual = 0xe */ ,
89 Assembler::lessEqual /* greater = 0xf, */
90
91 };
92
93
94 // Implementation of MacroAssembler
95
96 // First all the versions that have distinct versions depending on 32/64 bit
97 // Unless the difference is trivial (1 line or so).
98
99 #ifndef _LP64
100
101 // 32bit versions
102
103 Address MacroAssembler::as_Address(AddressLiteral adr) {
104 return Address(adr.target(), adr.rspec());
105 }
106
107 Address MacroAssembler::as_Address(ArrayAddress adr, Register rscratch) {
108 assert(rscratch == noreg, "");
109 return Address::make_array(adr);
110 }
111
112 void MacroAssembler::call_VM_leaf_base(address entry_point,
113 int number_of_arguments) {
114 call(RuntimeAddress(entry_point));
115 increment(rsp, number_of_arguments * wordSize);
116 }
117
118 void MacroAssembler::cmpklass(Address src1, Metadata* obj) {
119 cmp_literal32(src1, (int32_t)obj, metadata_Relocation::spec_for_immediate());
120 }
121
122
123 void MacroAssembler::cmpklass(Register src1, Metadata* obj) {
124 cmp_literal32(src1, (int32_t)obj, metadata_Relocation::spec_for_immediate());
125 }
126
127 void MacroAssembler::cmpoop(Address src1, jobject obj) {
128 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate());
129 }
130
131 void MacroAssembler::cmpoop(Register src1, jobject obj, Register rscratch) {
132 assert(rscratch == noreg, "redundant");
133 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate());
134 }
135
136 void MacroAssembler::extend_sign(Register hi, Register lo) {
137 // According to Intel Doc. AP-526, "Integer Divide", p.18.
138 if (VM_Version::is_P6() && hi == rdx && lo == rax) {
139 cdql();
140 } else {
141 movl(hi, lo);
142 sarl(hi, 31);
143 }
144 }
145
146 void MacroAssembler::jC2(Register tmp, Label& L) {
147 // set parity bit if FPU flag C2 is set (via rax)
148 save_rax(tmp);
149 fwait(); fnstsw_ax();
150 sahf();
151 restore_rax(tmp);
152 // branch
153 jcc(Assembler::parity, L);
154 }
155
156 void MacroAssembler::jnC2(Register tmp, Label& L) {
157 // set parity bit if FPU flag C2 is set (via rax)
158 save_rax(tmp);
159 fwait(); fnstsw_ax();
160 sahf();
161 restore_rax(tmp);
162 // branch
163 jcc(Assembler::noParity, L);
164 }
165
166 // 32bit can do a case table jump in one instruction but we no longer allow the base
167 // to be installed in the Address class
168 void MacroAssembler::jump(ArrayAddress entry, Register rscratch) {
169 assert(rscratch == noreg, "not needed");
170 jmp(as_Address(entry, noreg));
171 }
172
173 // Note: y_lo will be destroyed
174 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) {
175 // Long compare for Java (semantics as described in JVM spec.)
176 Label high, low, done;
177
178 cmpl(x_hi, y_hi);
179 jcc(Assembler::less, low);
180 jcc(Assembler::greater, high);
181 // x_hi is the return register
182 xorl(x_hi, x_hi);
183 cmpl(x_lo, y_lo);
184 jcc(Assembler::below, low);
185 jcc(Assembler::equal, done);
186
187 bind(high);
188 xorl(x_hi, x_hi);
189 increment(x_hi);
190 jmp(done);
191
192 bind(low);
193 xorl(x_hi, x_hi);
194 decrementl(x_hi);
195
196 bind(done);
197 }
198
199 void MacroAssembler::lea(Register dst, AddressLiteral src) {
200 mov_literal32(dst, (int32_t)src.target(), src.rspec());
201 }
202
203 void MacroAssembler::lea(Address dst, AddressLiteral adr, Register rscratch) {
204 assert(rscratch == noreg, "not needed");
205
206 // leal(dst, as_Address(adr));
207 // see note in movl as to why we must use a move
208 mov_literal32(dst, (int32_t)adr.target(), adr.rspec());
209 }
210
211 void MacroAssembler::leave() {
212 mov(rsp, rbp);
213 pop(rbp);
214 }
215
216 void MacroAssembler::lmul(int x_rsp_offset, int y_rsp_offset) {
217 // Multiplication of two Java long values stored on the stack
218 // as illustrated below. Result is in rdx:rax.
219 //
220 // rsp ---> [ ?? ] \ \
221 // .... | y_rsp_offset |
222 // [ y_lo ] / (in bytes) | x_rsp_offset
223 // [ y_hi ] | (in bytes)
224 // .... |
225 // [ x_lo ] /
226 // [ x_hi ]
227 // ....
228 //
229 // Basic idea: lo(result) = lo(x_lo * y_lo)
230 // hi(result) = hi(x_lo * y_lo) + lo(x_hi * y_lo) + lo(x_lo * y_hi)
231 Address x_hi(rsp, x_rsp_offset + wordSize); Address x_lo(rsp, x_rsp_offset);
232 Address y_hi(rsp, y_rsp_offset + wordSize); Address y_lo(rsp, y_rsp_offset);
233 Label quick;
234 // load x_hi, y_hi and check if quick
235 // multiplication is possible
236 movl(rbx, x_hi);
237 movl(rcx, y_hi);
238 movl(rax, rbx);
239 orl(rbx, rcx); // rbx, = 0 <=> x_hi = 0 and y_hi = 0
240 jcc(Assembler::zero, quick); // if rbx, = 0 do quick multiply
241 // do full multiplication
242 // 1st step
243 mull(y_lo); // x_hi * y_lo
244 movl(rbx, rax); // save lo(x_hi * y_lo) in rbx,
245 // 2nd step
246 movl(rax, x_lo);
247 mull(rcx); // x_lo * y_hi
248 addl(rbx, rax); // add lo(x_lo * y_hi) to rbx,
249 // 3rd step
250 bind(quick); // note: rbx, = 0 if quick multiply!
251 movl(rax, x_lo);
252 mull(y_lo); // x_lo * y_lo
253 addl(rdx, rbx); // correct hi(x_lo * y_lo)
254 }
255
256 void MacroAssembler::lneg(Register hi, Register lo) {
257 negl(lo);
258 adcl(hi, 0);
259 negl(hi);
260 }
261
262 void MacroAssembler::lshl(Register hi, Register lo) {
263 // Java shift left long support (semantics as described in JVM spec., p.305)
264 // (basic idea for shift counts s >= n: x << s == (x << n) << (s - n))
265 // shift value is in rcx !
266 assert(hi != rcx, "must not use rcx");
267 assert(lo != rcx, "must not use rcx");
268 const Register s = rcx; // shift count
269 const int n = BitsPerWord;
270 Label L;
271 andl(s, 0x3f); // s := s & 0x3f (s < 0x40)
272 cmpl(s, n); // if (s < n)
273 jcc(Assembler::less, L); // else (s >= n)
274 movl(hi, lo); // x := x << n
275 xorl(lo, lo);
276 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n!
277 bind(L); // s (mod n) < n
278 shldl(hi, lo); // x := x << s
279 shll(lo);
280 }
281
282
283 void MacroAssembler::lshr(Register hi, Register lo, bool sign_extension) {
284 // Java shift right long support (semantics as described in JVM spec., p.306 & p.310)
285 // (basic idea for shift counts s >= n: x >> s == (x >> n) >> (s - n))
286 assert(hi != rcx, "must not use rcx");
287 assert(lo != rcx, "must not use rcx");
288 const Register s = rcx; // shift count
289 const int n = BitsPerWord;
290 Label L;
291 andl(s, 0x3f); // s := s & 0x3f (s < 0x40)
292 cmpl(s, n); // if (s < n)
293 jcc(Assembler::less, L); // else (s >= n)
294 movl(lo, hi); // x := x >> n
295 if (sign_extension) sarl(hi, 31);
296 else xorl(hi, hi);
297 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n!
298 bind(L); // s (mod n) < n
299 shrdl(lo, hi); // x := x >> s
300 if (sign_extension) sarl(hi);
301 else shrl(hi);
302 }
303
304 void MacroAssembler::movoop(Register dst, jobject obj) {
305 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate());
306 }
307
308 void MacroAssembler::movoop(Address dst, jobject obj, Register rscratch) {
309 assert(rscratch == noreg, "redundant");
310 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate());
311 }
312
313 void MacroAssembler::mov_metadata(Register dst, Metadata* obj) {
314 mov_literal32(dst, (int32_t)obj, metadata_Relocation::spec_for_immediate());
315 }
316
317 void MacroAssembler::mov_metadata(Address dst, Metadata* obj, Register rscratch) {
318 assert(rscratch == noreg, "redundant");
319 mov_literal32(dst, (int32_t)obj, metadata_Relocation::spec_for_immediate());
320 }
321
322 void MacroAssembler::movptr(Register dst, AddressLiteral src) {
323 if (src.is_lval()) {
324 mov_literal32(dst, (intptr_t)src.target(), src.rspec());
325 } else {
326 movl(dst, as_Address(src));
327 }
328 }
329
330 void MacroAssembler::movptr(ArrayAddress dst, Register src, Register rscratch) {
331 assert(rscratch == noreg, "redundant");
332 movl(as_Address(dst, noreg), src);
333 }
334
335 void MacroAssembler::movptr(Register dst, ArrayAddress src) {
336 movl(dst, as_Address(src, noreg));
337 }
338
339 void MacroAssembler::movptr(Address dst, intptr_t src, Register rscratch) {
340 assert(rscratch == noreg, "redundant");
341 movl(dst, src);
342 }
343
344 void MacroAssembler::pushoop(jobject obj, Register rscratch) {
345 assert(rscratch == noreg, "redundant");
346 push_literal32((int32_t)obj, oop_Relocation::spec_for_immediate());
347 }
348
349 void MacroAssembler::pushklass(Metadata* obj, Register rscratch) {
350 assert(rscratch == noreg, "redundant");
351 push_literal32((int32_t)obj, metadata_Relocation::spec_for_immediate());
352 }
353
354 void MacroAssembler::pushptr(AddressLiteral src, Register rscratch) {
355 assert(rscratch == noreg, "redundant");
356 if (src.is_lval()) {
357 push_literal32((int32_t)src.target(), src.rspec());
358 } else {
359 pushl(as_Address(src));
360 }
361 }
362
363 static void pass_arg0(MacroAssembler* masm, Register arg) {
364 masm->push(arg);
365 }
366
367 static void pass_arg1(MacroAssembler* masm, Register arg) {
368 masm->push(arg);
369 }
370
371 static void pass_arg2(MacroAssembler* masm, Register arg) {
372 masm->push(arg);
373 }
374
375 static void pass_arg3(MacroAssembler* masm, Register arg) {
376 masm->push(arg);
377 }
378
379 #ifndef PRODUCT
380 extern "C" void findpc(intptr_t x);
381 #endif
382
383 void MacroAssembler::debug32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip, char* msg) {
384 // In order to get locks to work, we need to fake a in_VM state
385 JavaThread* thread = JavaThread::current();
386 JavaThreadState saved_state = thread->thread_state();
387 thread->set_thread_state(_thread_in_vm);
388 if (ShowMessageBoxOnError) {
389 JavaThread* thread = JavaThread::current();
390 JavaThreadState saved_state = thread->thread_state();
391 thread->set_thread_state(_thread_in_vm);
392 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
393 ttyLocker ttyl;
394 BytecodeCounter::print();
395 }
396 // To see where a verify_oop failed, get $ebx+40/X for this frame.
397 // This is the value of eip which points to where verify_oop will return.
398 if (os::message_box(msg, "Execution stopped, print registers?")) {
399 print_state32(rdi, rsi, rbp, rsp, rbx, rdx, rcx, rax, eip);
400 BREAKPOINT;
401 }
402 }
403 fatal("DEBUG MESSAGE: %s", msg);
404 }
405
406 void MacroAssembler::print_state32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip) {
407 ttyLocker ttyl;
408 DebuggingContext debugging{};
409 tty->print_cr("eip = 0x%08x", eip);
410 #ifndef PRODUCT
411 if ((WizardMode || Verbose) && PrintMiscellaneous) {
412 tty->cr();
413 findpc(eip);
414 tty->cr();
415 }
416 #endif
417 #define PRINT_REG(rax) \
418 { tty->print("%s = ", #rax); os::print_location(tty, rax); }
419 PRINT_REG(rax);
420 PRINT_REG(rbx);
421 PRINT_REG(rcx);
422 PRINT_REG(rdx);
423 PRINT_REG(rdi);
424 PRINT_REG(rsi);
425 PRINT_REG(rbp);
426 PRINT_REG(rsp);
427 #undef PRINT_REG
428 // Print some words near top of staack.
429 int* dump_sp = (int*) rsp;
430 for (int col1 = 0; col1 < 8; col1++) {
431 tty->print("(rsp+0x%03x) 0x%08x: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp);
432 os::print_location(tty, *dump_sp++);
433 }
434 for (int row = 0; row < 16; row++) {
435 tty->print("(rsp+0x%03x) 0x%08x: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp);
436 for (int col = 0; col < 8; col++) {
437 tty->print(" 0x%08x", *dump_sp++);
438 }
439 tty->cr();
440 }
441 // Print some instructions around pc:
442 Disassembler::decode((address)eip-64, (address)eip);
443 tty->print_cr("--------");
444 Disassembler::decode((address)eip, (address)eip+32);
445 }
446
447 void MacroAssembler::stop(const char* msg) {
448 // push address of message
449 ExternalAddress message((address)msg);
450 pushptr(message.addr(), noreg);
451 { Label L; call(L, relocInfo::none); bind(L); } // push eip
452 pusha(); // push registers
453 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug32)));
454 hlt();
455 }
456
457 void MacroAssembler::warn(const char* msg) {
458 push_CPU_state();
459
460 // push address of message
461 ExternalAddress message((address)msg);
462 pushptr(message.addr(), noreg);
463
464 call(RuntimeAddress(CAST_FROM_FN_PTR(address, warning)));
465 addl(rsp, wordSize); // discard argument
466 pop_CPU_state();
467 }
468
469 void MacroAssembler::print_state() {
470 { Label L; call(L, relocInfo::none); bind(L); } // push eip
471 pusha(); // push registers
472
473 push_CPU_state();
474 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::print_state32)));
475 pop_CPU_state();
476
477 popa();
478 addl(rsp, wordSize);
479 }
480
481 #else // _LP64
482
483 // 64 bit versions
484
485 Address MacroAssembler::as_Address(AddressLiteral adr) {
486 // amd64 always does this as a pc-rel
487 // we can be absolute or disp based on the instruction type
488 // jmp/call are displacements others are absolute
489 assert(!adr.is_lval(), "must be rval");
490 assert(reachable(adr), "must be");
491 return Address(checked_cast<int32_t>(adr.target() - pc()), adr.target(), adr.reloc());
492
493 }
494
495 Address MacroAssembler::as_Address(ArrayAddress adr, Register rscratch) {
496 AddressLiteral base = adr.base();
497 lea(rscratch, base);
498 Address index = adr.index();
499 assert(index._disp == 0, "must not have disp"); // maybe it can?
500 Address array(rscratch, index._index, index._scale, index._disp);
501 return array;
502 }
503
504 void MacroAssembler::call_VM_leaf_base(address entry_point, int num_args) {
505 Label L, E;
506
507 #ifdef _WIN64
508 // Windows always allocates space for it's register args
509 assert(num_args <= 4, "only register arguments supported");
510 subq(rsp, frame::arg_reg_save_area_bytes);
511 #endif
512
513 // Align stack if necessary
514 testl(rsp, 15);
515 jcc(Assembler::zero, L);
516
517 subq(rsp, 8);
518 call(RuntimeAddress(entry_point));
519 addq(rsp, 8);
520 jmp(E);
521
522 bind(L);
523 call(RuntimeAddress(entry_point));
524
525 bind(E);
526
527 #ifdef _WIN64
528 // restore stack pointer
529 addq(rsp, frame::arg_reg_save_area_bytes);
530 #endif
531
532 }
533
534 void MacroAssembler::cmp64(Register src1, AddressLiteral src2, Register rscratch) {
535 assert(!src2.is_lval(), "should use cmpptr");
536 assert(rscratch != noreg || always_reachable(src2), "missing");
537
538 if (reachable(src2)) {
539 cmpq(src1, as_Address(src2));
540 } else {
541 lea(rscratch, src2);
542 Assembler::cmpq(src1, Address(rscratch, 0));
543 }
544 }
545
546 int MacroAssembler::corrected_idivq(Register reg) {
547 // Full implementation of Java ldiv and lrem; checks for special
548 // case as described in JVM spec., p.243 & p.271. The function
549 // returns the (pc) offset of the idivl instruction - may be needed
550 // for implicit exceptions.
551 //
552 // normal case special case
553 //
554 // input : rax: dividend min_long
555 // reg: divisor (may not be eax/edx) -1
556 //
557 // output: rax: quotient (= rax idiv reg) min_long
558 // rdx: remainder (= rax irem reg) 0
559 assert(reg != rax && reg != rdx, "reg cannot be rax or rdx register");
560 static const int64_t min_long = 0x8000000000000000;
561 Label normal_case, special_case;
562
563 // check for special case
564 cmp64(rax, ExternalAddress((address) &min_long), rdx /*rscratch*/);
565 jcc(Assembler::notEqual, normal_case);
566 xorl(rdx, rdx); // prepare rdx for possible special case (where
567 // remainder = 0)
568 cmpq(reg, -1);
569 jcc(Assembler::equal, special_case);
570
571 // handle normal case
572 bind(normal_case);
573 cdqq();
574 int idivq_offset = offset();
575 idivq(reg);
576
577 // normal and special case exit
578 bind(special_case);
579
580 return idivq_offset;
581 }
582
583 void MacroAssembler::decrementq(Register reg, int value) {
584 if (value == min_jint) { subq(reg, value); return; }
585 if (value < 0) { incrementq(reg, -value); return; }
586 if (value == 0) { ; return; }
587 if (value == 1 && UseIncDec) { decq(reg) ; return; }
588 /* else */ { subq(reg, value) ; return; }
589 }
590
591 void MacroAssembler::decrementq(Address dst, int value) {
592 if (value == min_jint) { subq(dst, value); return; }
593 if (value < 0) { incrementq(dst, -value); return; }
594 if (value == 0) { ; return; }
595 if (value == 1 && UseIncDec) { decq(dst) ; return; }
596 /* else */ { subq(dst, value) ; return; }
597 }
598
599 void MacroAssembler::incrementq(AddressLiteral dst, Register rscratch) {
600 assert(rscratch != noreg || always_reachable(dst), "missing");
601
602 if (reachable(dst)) {
603 incrementq(as_Address(dst));
604 } else {
605 lea(rscratch, dst);
606 incrementq(Address(rscratch, 0));
607 }
608 }
609
610 void MacroAssembler::incrementq(Register reg, int value) {
611 if (value == min_jint) { addq(reg, value); return; }
612 if (value < 0) { decrementq(reg, -value); return; }
613 if (value == 0) { ; return; }
614 if (value == 1 && UseIncDec) { incq(reg) ; return; }
615 /* else */ { addq(reg, value) ; return; }
616 }
617
618 void MacroAssembler::incrementq(Address dst, int value) {
619 if (value == min_jint) { addq(dst, value); return; }
620 if (value < 0) { decrementq(dst, -value); return; }
621 if (value == 0) { ; return; }
622 if (value == 1 && UseIncDec) { incq(dst) ; return; }
623 /* else */ { addq(dst, value) ; return; }
624 }
625
626 // 32bit can do a case table jump in one instruction but we no longer allow the base
627 // to be installed in the Address class
628 void MacroAssembler::jump(ArrayAddress entry, Register rscratch) {
629 lea(rscratch, entry.base());
630 Address dispatch = entry.index();
631 assert(dispatch._base == noreg, "must be");
632 dispatch._base = rscratch;
633 jmp(dispatch);
634 }
635
636 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) {
637 ShouldNotReachHere(); // 64bit doesn't use two regs
638 cmpq(x_lo, y_lo);
639 }
640
641 void MacroAssembler::lea(Register dst, AddressLiteral src) {
642 mov_literal64(dst, (intptr_t)src.target(), src.rspec());
643 }
644
645 void MacroAssembler::lea(Address dst, AddressLiteral adr, Register rscratch) {
646 lea(rscratch, adr);
647 movptr(dst, rscratch);
648 }
649
650 void MacroAssembler::leave() {
651 // %%% is this really better? Why not on 32bit too?
652 emit_int8((unsigned char)0xC9); // LEAVE
653 }
654
655 void MacroAssembler::lneg(Register hi, Register lo) {
656 ShouldNotReachHere(); // 64bit doesn't use two regs
657 negq(lo);
658 }
659
660 void MacroAssembler::movoop(Register dst, jobject obj) {
661 mov_literal64(dst, (intptr_t)obj, oop_Relocation::spec_for_immediate());
662 }
663
664 void MacroAssembler::movoop(Address dst, jobject obj, Register rscratch) {
665 mov_literal64(rscratch, (intptr_t)obj, oop_Relocation::spec_for_immediate());
666 movq(dst, rscratch);
667 }
668
669 void MacroAssembler::mov_metadata(Register dst, Metadata* obj) {
670 mov_literal64(dst, (intptr_t)obj, metadata_Relocation::spec_for_immediate());
671 }
672
673 void MacroAssembler::mov_metadata(Address dst, Metadata* obj, Register rscratch) {
674 mov_literal64(rscratch, (intptr_t)obj, metadata_Relocation::spec_for_immediate());
675 movq(dst, rscratch);
676 }
677
678 void MacroAssembler::movptr(Register dst, AddressLiteral src) {
679 if (src.is_lval()) {
680 mov_literal64(dst, (intptr_t)src.target(), src.rspec());
681 } else {
682 if (reachable(src)) {
683 movq(dst, as_Address(src));
684 } else {
685 lea(dst, src);
686 movq(dst, Address(dst, 0));
687 }
688 }
689 }
690
691 void MacroAssembler::movptr(ArrayAddress dst, Register src, Register rscratch) {
692 movq(as_Address(dst, rscratch), src);
693 }
694
695 void MacroAssembler::movptr(Register dst, ArrayAddress src) {
696 movq(dst, as_Address(src, dst /*rscratch*/));
697 }
698
699 // src should NEVER be a real pointer. Use AddressLiteral for true pointers
700 void MacroAssembler::movptr(Address dst, intptr_t src, Register rscratch) {
701 if (is_simm32(src)) {
702 movptr(dst, checked_cast<int32_t>(src));
703 } else {
704 mov64(rscratch, src);
705 movq(dst, rscratch);
706 }
707 }
708
709 void MacroAssembler::pushoop(jobject obj, Register rscratch) {
710 movoop(rscratch, obj);
711 push(rscratch);
712 }
713
714 void MacroAssembler::pushklass(Metadata* obj, Register rscratch) {
715 mov_metadata(rscratch, obj);
716 push(rscratch);
717 }
718
719 void MacroAssembler::pushptr(AddressLiteral src, Register rscratch) {
720 lea(rscratch, src);
721 if (src.is_lval()) {
722 push(rscratch);
723 } else {
724 pushq(Address(rscratch, 0));
725 }
726 }
727
728 void MacroAssembler::reset_last_Java_frame(bool clear_fp) {
729 reset_last_Java_frame(r15_thread, clear_fp);
730 }
731
732 void MacroAssembler::set_last_Java_frame(Register last_java_sp,
733 Register last_java_fp,
734 address last_java_pc,
735 Register rscratch) {
736 set_last_Java_frame(r15_thread, last_java_sp, last_java_fp, last_java_pc, rscratch);
737 }
738
739 static void pass_arg0(MacroAssembler* masm, Register arg) {
740 if (c_rarg0 != arg ) {
741 masm->mov(c_rarg0, arg);
742 }
743 }
744
745 static void pass_arg1(MacroAssembler* masm, Register arg) {
746 if (c_rarg1 != arg ) {
747 masm->mov(c_rarg1, arg);
748 }
749 }
750
751 static void pass_arg2(MacroAssembler* masm, Register arg) {
752 if (c_rarg2 != arg ) {
753 masm->mov(c_rarg2, arg);
754 }
755 }
756
757 static void pass_arg3(MacroAssembler* masm, Register arg) {
758 if (c_rarg3 != arg ) {
759 masm->mov(c_rarg3, arg);
760 }
761 }
762
763 void MacroAssembler::stop(const char* msg) {
764 if (ShowMessageBoxOnError) {
765 address rip = pc();
766 pusha(); // get regs on stack
767 lea(c_rarg1, InternalAddress(rip));
768 movq(c_rarg2, rsp); // pass pointer to regs array
769 }
770 lea(c_rarg0, ExternalAddress((address) msg));
771 andq(rsp, -16); // align stack as required by ABI
772 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug64)));
773 hlt();
774 }
775
776 void MacroAssembler::warn(const char* msg) {
777 push(rbp);
778 movq(rbp, rsp);
779 andq(rsp, -16); // align stack as required by push_CPU_state and call
780 push_CPU_state(); // keeps alignment at 16 bytes
781
782 lea(c_rarg0, ExternalAddress((address) msg));
783 call(RuntimeAddress(CAST_FROM_FN_PTR(address, warning)));
784
785 pop_CPU_state();
786 mov(rsp, rbp);
787 pop(rbp);
788 }
789
790 void MacroAssembler::print_state() {
791 address rip = pc();
792 pusha(); // get regs on stack
793 push(rbp);
794 movq(rbp, rsp);
795 andq(rsp, -16); // align stack as required by push_CPU_state and call
796 push_CPU_state(); // keeps alignment at 16 bytes
797
798 lea(c_rarg0, InternalAddress(rip));
799 lea(c_rarg1, Address(rbp, wordSize)); // pass pointer to regs array
800 call_VM_leaf(CAST_FROM_FN_PTR(address, MacroAssembler::print_state64), c_rarg0, c_rarg1);
801
802 pop_CPU_state();
803 mov(rsp, rbp);
804 pop(rbp);
805 popa();
806 }
807
808 #ifndef PRODUCT
809 extern "C" void findpc(intptr_t x);
810 #endif
811
812 void MacroAssembler::debug64(char* msg, int64_t pc, int64_t regs[]) {
813 // In order to get locks to work, we need to fake a in_VM state
814 if (ShowMessageBoxOnError) {
815 JavaThread* thread = JavaThread::current();
816 JavaThreadState saved_state = thread->thread_state();
817 thread->set_thread_state(_thread_in_vm);
818 #ifndef PRODUCT
819 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
820 ttyLocker ttyl;
821 BytecodeCounter::print();
822 }
823 #endif
824 // To see where a verify_oop failed, get $ebx+40/X for this frame.
825 // XXX correct this offset for amd64
826 // This is the value of eip which points to where verify_oop will return.
827 if (os::message_box(msg, "Execution stopped, print registers?")) {
828 print_state64(pc, regs);
829 BREAKPOINT;
830 }
831 }
832 fatal("DEBUG MESSAGE: %s", msg);
833 }
834
835 void MacroAssembler::print_state64(int64_t pc, int64_t regs[]) {
836 ttyLocker ttyl;
837 DebuggingContext debugging{};
838 tty->print_cr("rip = 0x%016lx", (intptr_t)pc);
839 #ifndef PRODUCT
840 tty->cr();
841 findpc(pc);
842 tty->cr();
843 #endif
844 #define PRINT_REG(rax, value) \
845 { tty->print("%s = ", #rax); os::print_location(tty, value); }
846 PRINT_REG(rax, regs[15]);
847 PRINT_REG(rbx, regs[12]);
848 PRINT_REG(rcx, regs[14]);
849 PRINT_REG(rdx, regs[13]);
850 PRINT_REG(rdi, regs[8]);
851 PRINT_REG(rsi, regs[9]);
852 PRINT_REG(rbp, regs[10]);
853 // rsp is actually not stored by pusha(), compute the old rsp from regs (rsp after pusha): regs + 16 = old rsp
854 PRINT_REG(rsp, (intptr_t)(®s[16]));
855 PRINT_REG(r8 , regs[7]);
856 PRINT_REG(r9 , regs[6]);
857 PRINT_REG(r10, regs[5]);
858 PRINT_REG(r11, regs[4]);
859 PRINT_REG(r12, regs[3]);
860 PRINT_REG(r13, regs[2]);
861 PRINT_REG(r14, regs[1]);
862 PRINT_REG(r15, regs[0]);
863 #undef PRINT_REG
864 // Print some words near the top of the stack.
865 int64_t* rsp = ®s[16];
866 int64_t* dump_sp = rsp;
867 for (int col1 = 0; col1 < 8; col1++) {
868 tty->print("(rsp+0x%03x) 0x%016lx: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp);
869 os::print_location(tty, *dump_sp++);
870 }
871 for (int row = 0; row < 25; row++) {
872 tty->print("(rsp+0x%03x) 0x%016lx: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp);
873 for (int col = 0; col < 4; col++) {
874 tty->print(" 0x%016lx", (intptr_t)*dump_sp++);
875 }
876 tty->cr();
877 }
878 // Print some instructions around pc:
879 Disassembler::decode((address)pc-64, (address)pc);
880 tty->print_cr("--------");
881 Disassembler::decode((address)pc, (address)pc+32);
882 }
883
884 // The java_calling_convention describes stack locations as ideal slots on
885 // a frame with no abi restrictions. Since we must observe abi restrictions
886 // (like the placement of the register window) the slots must be biased by
887 // the following value.
888 static int reg2offset_in(VMReg r) {
889 // Account for saved rbp and return address
890 // This should really be in_preserve_stack_slots
891 return (r->reg2stack() + 4) * VMRegImpl::stack_slot_size;
892 }
893
894 static int reg2offset_out(VMReg r) {
895 return (r->reg2stack() + SharedRuntime::out_preserve_stack_slots()) * VMRegImpl::stack_slot_size;
896 }
897
898 // A long move
899 void MacroAssembler::long_move(VMRegPair src, VMRegPair dst, Register tmp, int in_stk_bias, int out_stk_bias) {
900
901 // The calling conventions assures us that each VMregpair is either
902 // all really one physical register or adjacent stack slots.
903
904 if (src.is_single_phys_reg() ) {
905 if (dst.is_single_phys_reg()) {
906 if (dst.first() != src.first()) {
907 mov(dst.first()->as_Register(), src.first()->as_Register());
908 }
909 } else {
910 assert(dst.is_single_reg(), "not a stack pair: (%s, %s), (%s, %s)",
911 src.first()->name(), src.second()->name(), dst.first()->name(), dst.second()->name());
912 movq(Address(rsp, reg2offset_out(dst.first()) + out_stk_bias), src.first()->as_Register());
913 }
914 } else if (dst.is_single_phys_reg()) {
915 assert(src.is_single_reg(), "not a stack pair");
916 movq(dst.first()->as_Register(), Address(rbp, reg2offset_in(src.first()) + in_stk_bias));
917 } else {
918 assert(src.is_single_reg() && dst.is_single_reg(), "not stack pairs");
919 movq(tmp, Address(rbp, reg2offset_in(src.first()) + in_stk_bias));
920 movq(Address(rsp, reg2offset_out(dst.first()) + out_stk_bias), tmp);
921 }
922 }
923
924 // A double move
925 void MacroAssembler::double_move(VMRegPair src, VMRegPair dst, Register tmp, int in_stk_bias, int out_stk_bias) {
926
927 // The calling conventions assures us that each VMregpair is either
928 // all really one physical register or adjacent stack slots.
929
930 if (src.is_single_phys_reg() ) {
931 if (dst.is_single_phys_reg()) {
932 // In theory these overlap but the ordering is such that this is likely a nop
933 if ( src.first() != dst.first()) {
934 movdbl(dst.first()->as_XMMRegister(), src.first()->as_XMMRegister());
935 }
936 } else {
937 assert(dst.is_single_reg(), "not a stack pair");
938 movdbl(Address(rsp, reg2offset_out(dst.first()) + out_stk_bias), src.first()->as_XMMRegister());
939 }
940 } else if (dst.is_single_phys_reg()) {
941 assert(src.is_single_reg(), "not a stack pair");
942 movdbl(dst.first()->as_XMMRegister(), Address(rbp, reg2offset_in(src.first()) + in_stk_bias));
943 } else {
944 assert(src.is_single_reg() && dst.is_single_reg(), "not stack pairs");
945 movq(tmp, Address(rbp, reg2offset_in(src.first()) + in_stk_bias));
946 movq(Address(rsp, reg2offset_out(dst.first()) + out_stk_bias), tmp);
947 }
948 }
949
950
951 // A float arg may have to do float reg int reg conversion
952 void MacroAssembler::float_move(VMRegPair src, VMRegPair dst, Register tmp, int in_stk_bias, int out_stk_bias) {
953 assert(!src.second()->is_valid() && !dst.second()->is_valid(), "bad float_move");
954
955 // The calling conventions assures us that each VMregpair is either
956 // all really one physical register or adjacent stack slots.
957
958 if (src.first()->is_stack()) {
959 if (dst.first()->is_stack()) {
960 movl(tmp, Address(rbp, reg2offset_in(src.first()) + in_stk_bias));
961 movptr(Address(rsp, reg2offset_out(dst.first()) + out_stk_bias), tmp);
962 } else {
963 // stack to reg
964 assert(dst.first()->is_XMMRegister(), "only expect xmm registers as parameters");
965 movflt(dst.first()->as_XMMRegister(), Address(rbp, reg2offset_in(src.first()) + in_stk_bias));
966 }
967 } else if (dst.first()->is_stack()) {
968 // reg to stack
969 assert(src.first()->is_XMMRegister(), "only expect xmm registers as parameters");
970 movflt(Address(rsp, reg2offset_out(dst.first()) + out_stk_bias), src.first()->as_XMMRegister());
971 } else {
972 // reg to reg
973 // In theory these overlap but the ordering is such that this is likely a nop
974 if ( src.first() != dst.first()) {
975 movdbl(dst.first()->as_XMMRegister(), src.first()->as_XMMRegister());
976 }
977 }
978 }
979
980 // On 64 bit we will store integer like items to the stack as
981 // 64 bits items (x86_32/64 abi) even though java would only store
982 // 32bits for a parameter. On 32bit it will simply be 32 bits
983 // So this routine will do 32->32 on 32bit and 32->64 on 64bit
984 void MacroAssembler::move32_64(VMRegPair src, VMRegPair dst, Register tmp, int in_stk_bias, int out_stk_bias) {
985 if (src.first()->is_stack()) {
986 if (dst.first()->is_stack()) {
987 // stack to stack
988 movslq(tmp, Address(rbp, reg2offset_in(src.first()) + in_stk_bias));
989 movq(Address(rsp, reg2offset_out(dst.first()) + out_stk_bias), tmp);
990 } else {
991 // stack to reg
992 movslq(dst.first()->as_Register(), Address(rbp, reg2offset_in(src.first()) + in_stk_bias));
993 }
994 } else if (dst.first()->is_stack()) {
995 // reg to stack
996 // Do we really have to sign extend???
997 // __ movslq(src.first()->as_Register(), src.first()->as_Register());
998 movq(Address(rsp, reg2offset_out(dst.first()) + out_stk_bias), src.first()->as_Register());
999 } else {
1000 // Do we really have to sign extend???
1001 // __ movslq(dst.first()->as_Register(), src.first()->as_Register());
1002 if (dst.first() != src.first()) {
1003 movq(dst.first()->as_Register(), src.first()->as_Register());
1004 }
1005 }
1006 }
1007
1008 void MacroAssembler::move_ptr(VMRegPair src, VMRegPair dst) {
1009 if (src.first()->is_stack()) {
1010 if (dst.first()->is_stack()) {
1011 // stack to stack
1012 movq(rax, Address(rbp, reg2offset_in(src.first())));
1013 movq(Address(rsp, reg2offset_out(dst.first())), rax);
1014 } else {
1015 // stack to reg
1016 movq(dst.first()->as_Register(), Address(rbp, reg2offset_in(src.first())));
1017 }
1018 } else if (dst.first()->is_stack()) {
1019 // reg to stack
1020 movq(Address(rsp, reg2offset_out(dst.first())), src.first()->as_Register());
1021 } else {
1022 if (dst.first() != src.first()) {
1023 movq(dst.first()->as_Register(), src.first()->as_Register());
1024 }
1025 }
1026 }
1027
1028 // An oop arg. Must pass a handle not the oop itself
1029 void MacroAssembler::object_move(OopMap* map,
1030 int oop_handle_offset,
1031 int framesize_in_slots,
1032 VMRegPair src,
1033 VMRegPair dst,
1034 bool is_receiver,
1035 int* receiver_offset) {
1036
1037 // must pass a handle. First figure out the location we use as a handle
1038
1039 Register rHandle = dst.first()->is_stack() ? rax : dst.first()->as_Register();
1040
1041 // See if oop is null if it is we need no handle
1042
1043 if (src.first()->is_stack()) {
1044
1045 // Oop is already on the stack as an argument
1046 int offset_in_older_frame = src.first()->reg2stack() + SharedRuntime::out_preserve_stack_slots();
1047 map->set_oop(VMRegImpl::stack2reg(offset_in_older_frame + framesize_in_slots));
1048 if (is_receiver) {
1049 *receiver_offset = (offset_in_older_frame + framesize_in_slots) * VMRegImpl::stack_slot_size;
1050 }
1051
1052 cmpptr(Address(rbp, reg2offset_in(src.first())), NULL_WORD);
1053 lea(rHandle, Address(rbp, reg2offset_in(src.first())));
1054 // conditionally move a null
1055 cmovptr(Assembler::equal, rHandle, Address(rbp, reg2offset_in(src.first())));
1056 } else {
1057
1058 // Oop is in a register we must store it to the space we reserve
1059 // on the stack for oop_handles and pass a handle if oop is non-null
1060
1061 const Register rOop = src.first()->as_Register();
1062 int oop_slot;
1063 if (rOop == j_rarg0)
1064 oop_slot = 0;
1065 else if (rOop == j_rarg1)
1066 oop_slot = 1;
1067 else if (rOop == j_rarg2)
1068 oop_slot = 2;
1069 else if (rOop == j_rarg3)
1070 oop_slot = 3;
1071 else if (rOop == j_rarg4)
1072 oop_slot = 4;
1073 else {
1074 assert(rOop == j_rarg5, "wrong register");
1075 oop_slot = 5;
1076 }
1077
1078 oop_slot = oop_slot * VMRegImpl::slots_per_word + oop_handle_offset;
1079 int offset = oop_slot*VMRegImpl::stack_slot_size;
1080
1081 map->set_oop(VMRegImpl::stack2reg(oop_slot));
1082 // Store oop in handle area, may be null
1083 movptr(Address(rsp, offset), rOop);
1084 if (is_receiver) {
1085 *receiver_offset = offset;
1086 }
1087
1088 cmpptr(rOop, NULL_WORD);
1089 lea(rHandle, Address(rsp, offset));
1090 // conditionally move a null from the handle area where it was just stored
1091 cmovptr(Assembler::equal, rHandle, Address(rsp, offset));
1092 }
1093
1094 // If arg is on the stack then place it otherwise it is already in correct reg.
1095 if (dst.first()->is_stack()) {
1096 movptr(Address(rsp, reg2offset_out(dst.first())), rHandle);
1097 }
1098 }
1099
1100 #endif // _LP64
1101
1102 // Now versions that are common to 32/64 bit
1103
1104 void MacroAssembler::addptr(Register dst, int32_t imm32) {
1105 LP64_ONLY(addq(dst, imm32)) NOT_LP64(addl(dst, imm32));
1106 }
1107
1108 void MacroAssembler::addptr(Register dst, Register src) {
1109 LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src));
1110 }
1111
1112 void MacroAssembler::addptr(Address dst, Register src) {
1113 LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src));
1114 }
1115
1116 void MacroAssembler::addsd(XMMRegister dst, AddressLiteral src, Register rscratch) {
1117 assert(rscratch != noreg || always_reachable(src), "missing");
1118
1119 if (reachable(src)) {
1120 Assembler::addsd(dst, as_Address(src));
1121 } else {
1122 lea(rscratch, src);
1123 Assembler::addsd(dst, Address(rscratch, 0));
1124 }
1125 }
1126
1127 void MacroAssembler::addss(XMMRegister dst, AddressLiteral src, Register rscratch) {
1128 assert(rscratch != noreg || always_reachable(src), "missing");
1129
1130 if (reachable(src)) {
1131 addss(dst, as_Address(src));
1132 } else {
1133 lea(rscratch, src);
1134 addss(dst, Address(rscratch, 0));
1135 }
1136 }
1137
1138 void MacroAssembler::addpd(XMMRegister dst, AddressLiteral src, Register rscratch) {
1139 assert(rscratch != noreg || always_reachable(src), "missing");
1140
1141 if (reachable(src)) {
1142 Assembler::addpd(dst, as_Address(src));
1143 } else {
1144 lea(rscratch, src);
1145 Assembler::addpd(dst, Address(rscratch, 0));
1146 }
1147 }
1148
1149 // See 8273459. Function for ensuring 64-byte alignment, intended for stubs only.
1150 // Stub code is generated once and never copied.
1151 // NMethods can't use this because they get copied and we can't force alignment > 32 bytes.
1152 void MacroAssembler::align64() {
1153 align(64, (unsigned long long) pc());
1154 }
1155
1156 void MacroAssembler::align32() {
1157 align(32, (unsigned long long) pc());
1158 }
1159
1160 void MacroAssembler::align(int modulus) {
1161 // 8273459: Ensure alignment is possible with current segment alignment
1162 assert(modulus <= CodeEntryAlignment, "Alignment must be <= CodeEntryAlignment");
1163 align(modulus, offset());
1164 }
1165
1166 void MacroAssembler::align(int modulus, int target) {
1167 if (target % modulus != 0) {
1168 nop(modulus - (target % modulus));
1169 }
1170 }
1171
1172 void MacroAssembler::push_f(XMMRegister r) {
1173 subptr(rsp, wordSize);
1174 movflt(Address(rsp, 0), r);
1175 }
1176
1177 void MacroAssembler::pop_f(XMMRegister r) {
1178 movflt(r, Address(rsp, 0));
1179 addptr(rsp, wordSize);
1180 }
1181
1182 void MacroAssembler::push_d(XMMRegister r) {
1183 subptr(rsp, 2 * wordSize);
1184 movdbl(Address(rsp, 0), r);
1185 }
1186
1187 void MacroAssembler::pop_d(XMMRegister r) {
1188 movdbl(r, Address(rsp, 0));
1189 addptr(rsp, 2 * Interpreter::stackElementSize);
1190 }
1191
1192 void MacroAssembler::andpd(XMMRegister dst, AddressLiteral src, Register rscratch) {
1193 // Used in sign-masking with aligned address.
1194 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
1195 assert(rscratch != noreg || always_reachable(src), "missing");
1196
1197 if (reachable(src)) {
1198 Assembler::andpd(dst, as_Address(src));
1199 } else {
1200 lea(rscratch, src);
1201 Assembler::andpd(dst, Address(rscratch, 0));
1202 }
1203 }
1204
1205 void MacroAssembler::andps(XMMRegister dst, AddressLiteral src, Register rscratch) {
1206 // Used in sign-masking with aligned address.
1207 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
1208 assert(rscratch != noreg || always_reachable(src), "missing");
1209
1210 if (reachable(src)) {
1211 Assembler::andps(dst, as_Address(src));
1212 } else {
1213 lea(rscratch, src);
1214 Assembler::andps(dst, Address(rscratch, 0));
1215 }
1216 }
1217
1218 void MacroAssembler::andptr(Register dst, int32_t imm32) {
1219 LP64_ONLY(andq(dst, imm32)) NOT_LP64(andl(dst, imm32));
1220 }
1221
1222 #ifdef _LP64
1223 void MacroAssembler::andq(Register dst, AddressLiteral src, Register rscratch) {
1224 assert(rscratch != noreg || always_reachable(src), "missing");
1225
1226 if (reachable(src)) {
1227 andq(dst, as_Address(src));
1228 } else {
1229 lea(rscratch, src);
1230 andq(dst, Address(rscratch, 0));
1231 }
1232 }
1233 #endif
1234
1235 void MacroAssembler::atomic_incl(Address counter_addr) {
1236 lock();
1237 incrementl(counter_addr);
1238 }
1239
1240 void MacroAssembler::atomic_incl(AddressLiteral counter_addr, Register rscratch) {
1241 assert(rscratch != noreg || always_reachable(counter_addr), "missing");
1242
1243 if (reachable(counter_addr)) {
1244 atomic_incl(as_Address(counter_addr));
1245 } else {
1246 lea(rscratch, counter_addr);
1247 atomic_incl(Address(rscratch, 0));
1248 }
1249 }
1250
1251 #ifdef _LP64
1252 void MacroAssembler::atomic_incq(Address counter_addr) {
1253 lock();
1254 incrementq(counter_addr);
1255 }
1256
1257 void MacroAssembler::atomic_incq(AddressLiteral counter_addr, Register rscratch) {
1258 assert(rscratch != noreg || always_reachable(counter_addr), "missing");
1259
1260 if (reachable(counter_addr)) {
1261 atomic_incq(as_Address(counter_addr));
1262 } else {
1263 lea(rscratch, counter_addr);
1264 atomic_incq(Address(rscratch, 0));
1265 }
1266 }
1267 #endif
1268
1269 // Writes to stack successive pages until offset reached to check for
1270 // stack overflow + shadow pages. This clobbers tmp.
1271 void MacroAssembler::bang_stack_size(Register size, Register tmp) {
1272 movptr(tmp, rsp);
1273 // Bang stack for total size given plus shadow page size.
1274 // Bang one page at a time because large size can bang beyond yellow and
1275 // red zones.
1276 Label loop;
1277 bind(loop);
1278 movl(Address(tmp, (-(int)os::vm_page_size())), size );
1279 subptr(tmp, (int)os::vm_page_size());
1280 subl(size, (int)os::vm_page_size());
1281 jcc(Assembler::greater, loop);
1282
1283 // Bang down shadow pages too.
1284 // At this point, (tmp-0) is the last address touched, so don't
1285 // touch it again. (It was touched as (tmp-pagesize) but then tmp
1286 // was post-decremented.) Skip this address by starting at i=1, and
1287 // touch a few more pages below. N.B. It is important to touch all
1288 // the way down including all pages in the shadow zone.
1289 for (int i = 1; i < ((int)StackOverflow::stack_shadow_zone_size() / (int)os::vm_page_size()); i++) {
1290 // this could be any sized move but this is can be a debugging crumb
1291 // so the bigger the better.
1292 movptr(Address(tmp, (-i*(int)os::vm_page_size())), size );
1293 }
1294 }
1295
1296 void MacroAssembler::reserved_stack_check() {
1297 // testing if reserved zone needs to be enabled
1298 Label no_reserved_zone_enabling;
1299 Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread);
1300 NOT_LP64(get_thread(rsi);)
1301
1302 cmpptr(rsp, Address(thread, JavaThread::reserved_stack_activation_offset()));
1303 jcc(Assembler::below, no_reserved_zone_enabling);
1304
1305 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), thread);
1306 jump(RuntimeAddress(StubRoutines::throw_delayed_StackOverflowError_entry()));
1307 should_not_reach_here();
1308
1309 bind(no_reserved_zone_enabling);
1310 }
1311
1312 void MacroAssembler::c2bool(Register x) {
1313 // implements x == 0 ? 0 : 1
1314 // note: must only look at least-significant byte of x
1315 // since C-style booleans are stored in one byte
1316 // only! (was bug)
1317 andl(x, 0xFF);
1318 setb(Assembler::notZero, x);
1319 }
1320
1321 // Wouldn't need if AddressLiteral version had new name
1322 void MacroAssembler::call(Label& L, relocInfo::relocType rtype) {
1323 Assembler::call(L, rtype);
1324 }
1325
1326 void MacroAssembler::call(Register entry) {
1327 Assembler::call(entry);
1328 }
1329
1330 void MacroAssembler::call(AddressLiteral entry, Register rscratch) {
1331 assert(rscratch != noreg || always_reachable(entry), "missing");
1332
1333 if (reachable(entry)) {
1334 Assembler::call_literal(entry.target(), entry.rspec());
1335 } else {
1336 lea(rscratch, entry);
1337 Assembler::call(rscratch);
1338 }
1339 }
1340
1341 void MacroAssembler::ic_call(address entry, jint method_index) {
1342 RelocationHolder rh = virtual_call_Relocation::spec(pc(), method_index);
1343 #ifdef _LP64
1344 // Needs full 64-bit immediate for later patching.
1345 mov64(rax, (int64_t)Universe::non_oop_word());
1346 #else
1347 movptr(rax, (intptr_t)Universe::non_oop_word());
1348 #endif
1349 call(AddressLiteral(entry, rh));
1350 }
1351
1352 int MacroAssembler::ic_check_size() {
1353 return LP64_ONLY(14) NOT_LP64(12);
1354 }
1355
1356 int MacroAssembler::ic_check(int end_alignment) {
1357 Register receiver = LP64_ONLY(j_rarg0) NOT_LP64(rcx);
1358 Register data = rax;
1359 Register temp = LP64_ONLY(rscratch1) NOT_LP64(rbx);
1360
1361 // The UEP of a code blob ensures that the VEP is padded. However, the padding of the UEP is placed
1362 // before the inline cache check, so we don't have to execute any nop instructions when dispatching
1363 // through the UEP, yet we can ensure that the VEP is aligned appropriately. That's why we align
1364 // before the inline cache check here, and not after
1365 align(end_alignment, offset() + ic_check_size());
1366
1367 int uep_offset = offset();
1368
1369 if (UseCompressedClassPointers) {
1370 movl(temp, Address(receiver, oopDesc::klass_offset_in_bytes()));
1371 cmpl(temp, Address(data, CompiledICData::speculated_klass_offset()));
1372 } else {
1373 movptr(temp, Address(receiver, oopDesc::klass_offset_in_bytes()));
1374 cmpptr(temp, Address(data, CompiledICData::speculated_klass_offset()));
1375 }
1376
1377 // if inline cache check fails, then jump to runtime routine
1378 jump_cc(Assembler::notEqual, RuntimeAddress(SharedRuntime::get_ic_miss_stub()));
1379 assert((offset() % end_alignment) == 0, "Misaligned verified entry point");
1380
1381 return uep_offset;
1382 }
1383
1384 void MacroAssembler::emit_static_call_stub() {
1385 // Static stub relocation also tags the Method* in the code-stream.
1386 mov_metadata(rbx, (Metadata*) nullptr); // Method is zapped till fixup time.
1387 // This is recognized as unresolved by relocs/nativeinst/ic code.
1388 jump(RuntimeAddress(pc()));
1389 }
1390
1391 // Implementation of call_VM versions
1392
1393 void MacroAssembler::call_VM(Register oop_result,
1394 address entry_point,
1395 bool check_exceptions) {
1396 Label C, E;
1397 call(C, relocInfo::none);
1398 jmp(E);
1399
1400 bind(C);
1401 call_VM_helper(oop_result, entry_point, 0, check_exceptions);
1402 ret(0);
1403
1404 bind(E);
1405 }
1406
1407 void MacroAssembler::call_VM(Register oop_result,
1408 address entry_point,
1409 Register arg_1,
1410 bool check_exceptions) {
1411 Label C, E;
1412 call(C, relocInfo::none);
1413 jmp(E);
1414
1415 bind(C);
1416 pass_arg1(this, arg_1);
1417 call_VM_helper(oop_result, entry_point, 1, check_exceptions);
1418 ret(0);
1419
1420 bind(E);
1421 }
1422
1423 void MacroAssembler::call_VM(Register oop_result,
1424 address entry_point,
1425 Register arg_1,
1426 Register arg_2,
1427 bool check_exceptions) {
1428 Label C, E;
1429 call(C, relocInfo::none);
1430 jmp(E);
1431
1432 bind(C);
1433
1434 LP64_ONLY(assert_different_registers(arg_1, c_rarg2));
1435
1436 pass_arg2(this, arg_2);
1437 pass_arg1(this, arg_1);
1438 call_VM_helper(oop_result, entry_point, 2, check_exceptions);
1439 ret(0);
1440
1441 bind(E);
1442 }
1443
1444 void MacroAssembler::call_VM(Register oop_result,
1445 address entry_point,
1446 Register arg_1,
1447 Register arg_2,
1448 Register arg_3,
1449 bool check_exceptions) {
1450 Label C, E;
1451 call(C, relocInfo::none);
1452 jmp(E);
1453
1454 bind(C);
1455
1456 LP64_ONLY(assert_different_registers(arg_1, c_rarg2, c_rarg3));
1457 LP64_ONLY(assert_different_registers(arg_2, c_rarg3));
1458 pass_arg3(this, arg_3);
1459 pass_arg2(this, arg_2);
1460 pass_arg1(this, arg_1);
1461 call_VM_helper(oop_result, entry_point, 3, check_exceptions);
1462 ret(0);
1463
1464 bind(E);
1465 }
1466
1467 void MacroAssembler::call_VM(Register oop_result,
1468 Register last_java_sp,
1469 address entry_point,
1470 int number_of_arguments,
1471 bool check_exceptions) {
1472 Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg);
1473 call_VM_base(oop_result, thread, last_java_sp, entry_point, number_of_arguments, check_exceptions);
1474 }
1475
1476 void MacroAssembler::call_VM(Register oop_result,
1477 Register last_java_sp,
1478 address entry_point,
1479 Register arg_1,
1480 bool check_exceptions) {
1481 pass_arg1(this, arg_1);
1482 call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions);
1483 }
1484
1485 void MacroAssembler::call_VM(Register oop_result,
1486 Register last_java_sp,
1487 address entry_point,
1488 Register arg_1,
1489 Register arg_2,
1490 bool check_exceptions) {
1491
1492 LP64_ONLY(assert_different_registers(arg_1, c_rarg2));
1493 pass_arg2(this, arg_2);
1494 pass_arg1(this, arg_1);
1495 call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions);
1496 }
1497
1498 void MacroAssembler::call_VM(Register oop_result,
1499 Register last_java_sp,
1500 address entry_point,
1501 Register arg_1,
1502 Register arg_2,
1503 Register arg_3,
1504 bool check_exceptions) {
1505 LP64_ONLY(assert_different_registers(arg_1, c_rarg2, c_rarg3));
1506 LP64_ONLY(assert_different_registers(arg_2, c_rarg3));
1507 pass_arg3(this, arg_3);
1508 pass_arg2(this, arg_2);
1509 pass_arg1(this, arg_1);
1510 call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions);
1511 }
1512
1513 void MacroAssembler::super_call_VM(Register oop_result,
1514 Register last_java_sp,
1515 address entry_point,
1516 int number_of_arguments,
1517 bool check_exceptions) {
1518 Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg);
1519 MacroAssembler::call_VM_base(oop_result, thread, last_java_sp, entry_point, number_of_arguments, check_exceptions);
1520 }
1521
1522 void MacroAssembler::super_call_VM(Register oop_result,
1523 Register last_java_sp,
1524 address entry_point,
1525 Register arg_1,
1526 bool check_exceptions) {
1527 pass_arg1(this, arg_1);
1528 super_call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions);
1529 }
1530
1531 void MacroAssembler::super_call_VM(Register oop_result,
1532 Register last_java_sp,
1533 address entry_point,
1534 Register arg_1,
1535 Register arg_2,
1536 bool check_exceptions) {
1537
1538 LP64_ONLY(assert_different_registers(arg_1, c_rarg2));
1539 pass_arg2(this, arg_2);
1540 pass_arg1(this, arg_1);
1541 super_call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions);
1542 }
1543
1544 void MacroAssembler::super_call_VM(Register oop_result,
1545 Register last_java_sp,
1546 address entry_point,
1547 Register arg_1,
1548 Register arg_2,
1549 Register arg_3,
1550 bool check_exceptions) {
1551 LP64_ONLY(assert_different_registers(arg_1, c_rarg2, c_rarg3));
1552 LP64_ONLY(assert_different_registers(arg_2, c_rarg3));
1553 pass_arg3(this, arg_3);
1554 pass_arg2(this, arg_2);
1555 pass_arg1(this, arg_1);
1556 super_call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions);
1557 }
1558
1559 void MacroAssembler::call_VM_base(Register oop_result,
1560 Register java_thread,
1561 Register last_java_sp,
1562 address entry_point,
1563 int number_of_arguments,
1564 bool check_exceptions) {
1565 // determine java_thread register
1566 if (!java_thread->is_valid()) {
1567 #ifdef _LP64
1568 java_thread = r15_thread;
1569 #else
1570 java_thread = rdi;
1571 get_thread(java_thread);
1572 #endif // LP64
1573 }
1574 // determine last_java_sp register
1575 if (!last_java_sp->is_valid()) {
1576 last_java_sp = rsp;
1577 }
1578 // debugging support
1579 assert(number_of_arguments >= 0 , "cannot have negative number of arguments");
1580 LP64_ONLY(assert(java_thread == r15_thread, "unexpected register"));
1581 #ifdef ASSERT
1582 // TraceBytecodes does not use r12 but saves it over the call, so don't verify
1583 // r12 is the heapbase.
1584 LP64_ONLY(if (UseCompressedOops && !TraceBytecodes) verify_heapbase("call_VM_base: heap base corrupted?");)
1585 #endif // ASSERT
1586
1587 assert(java_thread != oop_result , "cannot use the same register for java_thread & oop_result");
1588 assert(java_thread != last_java_sp, "cannot use the same register for java_thread & last_java_sp");
1589
1590 // push java thread (becomes first argument of C function)
1591
1592 NOT_LP64(push(java_thread); number_of_arguments++);
1593 LP64_ONLY(mov(c_rarg0, r15_thread));
1594
1595 // set last Java frame before call
1596 assert(last_java_sp != rbp, "can't use ebp/rbp");
1597
1598 // Only interpreter should have to set fp
1599 set_last_Java_frame(java_thread, last_java_sp, rbp, nullptr, rscratch1);
1600
1601 // do the call, remove parameters
1602 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
1603
1604 // restore the thread (cannot use the pushed argument since arguments
1605 // may be overwritten by C code generated by an optimizing compiler);
1606 // however can use the register value directly if it is callee saved.
1607 if (LP64_ONLY(true ||) java_thread == rdi || java_thread == rsi) {
1608 // rdi & rsi (also r15) are callee saved -> nothing to do
1609 #ifdef ASSERT
1610 guarantee(java_thread != rax, "change this code");
1611 push(rax);
1612 { Label L;
1613 get_thread(rax);
1614 cmpptr(java_thread, rax);
1615 jcc(Assembler::equal, L);
1616 STOP("MacroAssembler::call_VM_base: rdi not callee saved?");
1617 bind(L);
1618 }
1619 pop(rax);
1620 #endif
1621 } else {
1622 get_thread(java_thread);
1623 }
1624 // reset last Java frame
1625 // Only interpreter should have to clear fp
1626 reset_last_Java_frame(java_thread, true);
1627
1628 // C++ interp handles this in the interpreter
1629 check_and_handle_popframe(java_thread);
1630 check_and_handle_earlyret(java_thread);
1631
1632 if (check_exceptions) {
1633 // check for pending exceptions (java_thread is set upon return)
1634 cmpptr(Address(java_thread, Thread::pending_exception_offset()), NULL_WORD);
1635 #ifndef _LP64
1636 jump_cc(Assembler::notEqual,
1637 RuntimeAddress(StubRoutines::forward_exception_entry()));
1638 #else
1639 // This used to conditionally jump to forward_exception however it is
1640 // possible if we relocate that the branch will not reach. So we must jump
1641 // around so we can always reach
1642
1643 Label ok;
1644 jcc(Assembler::equal, ok);
1645 jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
1646 bind(ok);
1647 #endif // LP64
1648 }
1649
1650 // get oop result if there is one and reset the value in the thread
1651 if (oop_result->is_valid()) {
1652 get_vm_result(oop_result, java_thread);
1653 }
1654 }
1655
1656 void MacroAssembler::call_VM_helper(Register oop_result, address entry_point, int number_of_arguments, bool check_exceptions) {
1657
1658 // Calculate the value for last_Java_sp
1659 // somewhat subtle. call_VM does an intermediate call
1660 // which places a return address on the stack just under the
1661 // stack pointer as the user finished with it. This allows
1662 // use to retrieve last_Java_pc from last_Java_sp[-1].
1663 // On 32bit we then have to push additional args on the stack to accomplish
1664 // the actual requested call. On 64bit call_VM only can use register args
1665 // so the only extra space is the return address that call_VM created.
1666 // This hopefully explains the calculations here.
1667
1668 #ifdef _LP64
1669 // We've pushed one address, correct last_Java_sp
1670 lea(rax, Address(rsp, wordSize));
1671 #else
1672 lea(rax, Address(rsp, (1 + number_of_arguments) * wordSize));
1673 #endif // LP64
1674
1675 call_VM_base(oop_result, noreg, rax, entry_point, number_of_arguments, check_exceptions);
1676
1677 }
1678
1679 // Use this method when MacroAssembler version of call_VM_leaf_base() should be called from Interpreter.
1680 void MacroAssembler::call_VM_leaf0(address entry_point) {
1681 MacroAssembler::call_VM_leaf_base(entry_point, 0);
1682 }
1683
1684 void MacroAssembler::call_VM_leaf(address entry_point, int number_of_arguments) {
1685 call_VM_leaf_base(entry_point, number_of_arguments);
1686 }
1687
1688 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0) {
1689 pass_arg0(this, arg_0);
1690 call_VM_leaf(entry_point, 1);
1691 }
1692
1693 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1) {
1694
1695 LP64_ONLY(assert_different_registers(arg_0, c_rarg1));
1696 pass_arg1(this, arg_1);
1697 pass_arg0(this, arg_0);
1698 call_VM_leaf(entry_point, 2);
1699 }
1700
1701 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) {
1702 LP64_ONLY(assert_different_registers(arg_0, c_rarg1, c_rarg2));
1703 LP64_ONLY(assert_different_registers(arg_1, c_rarg2));
1704 pass_arg2(this, arg_2);
1705 pass_arg1(this, arg_1);
1706 pass_arg0(this, arg_0);
1707 call_VM_leaf(entry_point, 3);
1708 }
1709
1710 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2, Register arg_3) {
1711 LP64_ONLY(assert_different_registers(arg_0, c_rarg1, c_rarg2, c_rarg3));
1712 LP64_ONLY(assert_different_registers(arg_1, c_rarg2, c_rarg3));
1713 LP64_ONLY(assert_different_registers(arg_2, c_rarg3));
1714 pass_arg3(this, arg_3);
1715 pass_arg2(this, arg_2);
1716 pass_arg1(this, arg_1);
1717 pass_arg0(this, arg_0);
1718 call_VM_leaf(entry_point, 3);
1719 }
1720
1721 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0) {
1722 pass_arg0(this, arg_0);
1723 MacroAssembler::call_VM_leaf_base(entry_point, 1);
1724 }
1725
1726 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1) {
1727 LP64_ONLY(assert_different_registers(arg_0, c_rarg1));
1728 pass_arg1(this, arg_1);
1729 pass_arg0(this, arg_0);
1730 MacroAssembler::call_VM_leaf_base(entry_point, 2);
1731 }
1732
1733 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) {
1734 LP64_ONLY(assert_different_registers(arg_0, c_rarg1, c_rarg2));
1735 LP64_ONLY(assert_different_registers(arg_1, c_rarg2));
1736 pass_arg2(this, arg_2);
1737 pass_arg1(this, arg_1);
1738 pass_arg0(this, arg_0);
1739 MacroAssembler::call_VM_leaf_base(entry_point, 3);
1740 }
1741
1742 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2, Register arg_3) {
1743 LP64_ONLY(assert_different_registers(arg_0, c_rarg1, c_rarg2, c_rarg3));
1744 LP64_ONLY(assert_different_registers(arg_1, c_rarg2, c_rarg3));
1745 LP64_ONLY(assert_different_registers(arg_2, c_rarg3));
1746 pass_arg3(this, arg_3);
1747 pass_arg2(this, arg_2);
1748 pass_arg1(this, arg_1);
1749 pass_arg0(this, arg_0);
1750 MacroAssembler::call_VM_leaf_base(entry_point, 4);
1751 }
1752
1753 void MacroAssembler::get_vm_result(Register oop_result, Register java_thread) {
1754 movptr(oop_result, Address(java_thread, JavaThread::vm_result_offset()));
1755 movptr(Address(java_thread, JavaThread::vm_result_offset()), NULL_WORD);
1756 verify_oop_msg(oop_result, "broken oop in call_VM_base");
1757 }
1758
1759 void MacroAssembler::get_vm_result_2(Register metadata_result, Register java_thread) {
1760 movptr(metadata_result, Address(java_thread, JavaThread::vm_result_2_offset()));
1761 movptr(Address(java_thread, JavaThread::vm_result_2_offset()), NULL_WORD);
1762 }
1763
1764 void MacroAssembler::check_and_handle_earlyret(Register java_thread) {
1765 }
1766
1767 void MacroAssembler::check_and_handle_popframe(Register java_thread) {
1768 }
1769
1770 void MacroAssembler::cmp32(AddressLiteral src1, int32_t imm, Register rscratch) {
1771 assert(rscratch != noreg || always_reachable(src1), "missing");
1772
1773 if (reachable(src1)) {
1774 cmpl(as_Address(src1), imm);
1775 } else {
1776 lea(rscratch, src1);
1777 cmpl(Address(rscratch, 0), imm);
1778 }
1779 }
1780
1781 void MacroAssembler::cmp32(Register src1, AddressLiteral src2, Register rscratch) {
1782 assert(!src2.is_lval(), "use cmpptr");
1783 assert(rscratch != noreg || always_reachable(src2), "missing");
1784
1785 if (reachable(src2)) {
1786 cmpl(src1, as_Address(src2));
1787 } else {
1788 lea(rscratch, src2);
1789 cmpl(src1, Address(rscratch, 0));
1790 }
1791 }
1792
1793 void MacroAssembler::cmp32(Register src1, int32_t imm) {
1794 Assembler::cmpl(src1, imm);
1795 }
1796
1797 void MacroAssembler::cmp32(Register src1, Address src2) {
1798 Assembler::cmpl(src1, src2);
1799 }
1800
1801 void MacroAssembler::cmpsd2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) {
1802 ucomisd(opr1, opr2);
1803
1804 Label L;
1805 if (unordered_is_less) {
1806 movl(dst, -1);
1807 jcc(Assembler::parity, L);
1808 jcc(Assembler::below , L);
1809 movl(dst, 0);
1810 jcc(Assembler::equal , L);
1811 increment(dst);
1812 } else { // unordered is greater
1813 movl(dst, 1);
1814 jcc(Assembler::parity, L);
1815 jcc(Assembler::above , L);
1816 movl(dst, 0);
1817 jcc(Assembler::equal , L);
1818 decrementl(dst);
1819 }
1820 bind(L);
1821 }
1822
1823 void MacroAssembler::cmpss2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) {
1824 ucomiss(opr1, opr2);
1825
1826 Label L;
1827 if (unordered_is_less) {
1828 movl(dst, -1);
1829 jcc(Assembler::parity, L);
1830 jcc(Assembler::below , L);
1831 movl(dst, 0);
1832 jcc(Assembler::equal , L);
1833 increment(dst);
1834 } else { // unordered is greater
1835 movl(dst, 1);
1836 jcc(Assembler::parity, L);
1837 jcc(Assembler::above , L);
1838 movl(dst, 0);
1839 jcc(Assembler::equal , L);
1840 decrementl(dst);
1841 }
1842 bind(L);
1843 }
1844
1845
1846 void MacroAssembler::cmp8(AddressLiteral src1, int imm, Register rscratch) {
1847 assert(rscratch != noreg || always_reachable(src1), "missing");
1848
1849 if (reachable(src1)) {
1850 cmpb(as_Address(src1), imm);
1851 } else {
1852 lea(rscratch, src1);
1853 cmpb(Address(rscratch, 0), imm);
1854 }
1855 }
1856
1857 void MacroAssembler::cmpptr(Register src1, AddressLiteral src2, Register rscratch) {
1858 #ifdef _LP64
1859 assert(rscratch != noreg || always_reachable(src2), "missing");
1860
1861 if (src2.is_lval()) {
1862 movptr(rscratch, src2);
1863 Assembler::cmpq(src1, rscratch);
1864 } else if (reachable(src2)) {
1865 cmpq(src1, as_Address(src2));
1866 } else {
1867 lea(rscratch, src2);
1868 Assembler::cmpq(src1, Address(rscratch, 0));
1869 }
1870 #else
1871 assert(rscratch == noreg, "not needed");
1872 if (src2.is_lval()) {
1873 cmp_literal32(src1, (int32_t)src2.target(), src2.rspec());
1874 } else {
1875 cmpl(src1, as_Address(src2));
1876 }
1877 #endif // _LP64
1878 }
1879
1880 void MacroAssembler::cmpptr(Address src1, AddressLiteral src2, Register rscratch) {
1881 assert(src2.is_lval(), "not a mem-mem compare");
1882 #ifdef _LP64
1883 // moves src2's literal address
1884 movptr(rscratch, src2);
1885 Assembler::cmpq(src1, rscratch);
1886 #else
1887 assert(rscratch == noreg, "not needed");
1888 cmp_literal32(src1, (int32_t)src2.target(), src2.rspec());
1889 #endif // _LP64
1890 }
1891
1892 void MacroAssembler::cmpoop(Register src1, Register src2) {
1893 cmpptr(src1, src2);
1894 }
1895
1896 void MacroAssembler::cmpoop(Register src1, Address src2) {
1897 cmpptr(src1, src2);
1898 }
1899
1900 #ifdef _LP64
1901 void MacroAssembler::cmpoop(Register src1, jobject src2, Register rscratch) {
1902 movoop(rscratch, src2);
1903 cmpptr(src1, rscratch);
1904 }
1905 #endif
1906
1907 void MacroAssembler::locked_cmpxchgptr(Register reg, AddressLiteral adr, Register rscratch) {
1908 assert(rscratch != noreg || always_reachable(adr), "missing");
1909
1910 if (reachable(adr)) {
1911 lock();
1912 cmpxchgptr(reg, as_Address(adr));
1913 } else {
1914 lea(rscratch, adr);
1915 lock();
1916 cmpxchgptr(reg, Address(rscratch, 0));
1917 }
1918 }
1919
1920 void MacroAssembler::cmpxchgptr(Register reg, Address adr) {
1921 LP64_ONLY(cmpxchgq(reg, adr)) NOT_LP64(cmpxchgl(reg, adr));
1922 }
1923
1924 void MacroAssembler::comisd(XMMRegister dst, AddressLiteral src, Register rscratch) {
1925 assert(rscratch != noreg || always_reachable(src), "missing");
1926
1927 if (reachable(src)) {
1928 Assembler::comisd(dst, as_Address(src));
1929 } else {
1930 lea(rscratch, src);
1931 Assembler::comisd(dst, Address(rscratch, 0));
1932 }
1933 }
1934
1935 void MacroAssembler::comiss(XMMRegister dst, AddressLiteral src, Register rscratch) {
1936 assert(rscratch != noreg || always_reachable(src), "missing");
1937
1938 if (reachable(src)) {
1939 Assembler::comiss(dst, as_Address(src));
1940 } else {
1941 lea(rscratch, src);
1942 Assembler::comiss(dst, Address(rscratch, 0));
1943 }
1944 }
1945
1946
1947 void MacroAssembler::cond_inc32(Condition cond, AddressLiteral counter_addr, Register rscratch) {
1948 assert(rscratch != noreg || always_reachable(counter_addr), "missing");
1949
1950 Condition negated_cond = negate_condition(cond);
1951 Label L;
1952 jcc(negated_cond, L);
1953 pushf(); // Preserve flags
1954 atomic_incl(counter_addr, rscratch);
1955 popf();
1956 bind(L);
1957 }
1958
1959 int MacroAssembler::corrected_idivl(Register reg) {
1960 // Full implementation of Java idiv and irem; checks for
1961 // special case as described in JVM spec., p.243 & p.271.
1962 // The function returns the (pc) offset of the idivl
1963 // instruction - may be needed for implicit exceptions.
1964 //
1965 // normal case special case
1966 //
1967 // input : rax,: dividend min_int
1968 // reg: divisor (may not be rax,/rdx) -1
1969 //
1970 // output: rax,: quotient (= rax, idiv reg) min_int
1971 // rdx: remainder (= rax, irem reg) 0
1972 assert(reg != rax && reg != rdx, "reg cannot be rax, or rdx register");
1973 const int min_int = 0x80000000;
1974 Label normal_case, special_case;
1975
1976 // check for special case
1977 cmpl(rax, min_int);
1978 jcc(Assembler::notEqual, normal_case);
1979 xorl(rdx, rdx); // prepare rdx for possible special case (where remainder = 0)
1980 cmpl(reg, -1);
1981 jcc(Assembler::equal, special_case);
1982
1983 // handle normal case
1984 bind(normal_case);
1985 cdql();
1986 int idivl_offset = offset();
1987 idivl(reg);
1988
1989 // normal and special case exit
1990 bind(special_case);
1991
1992 return idivl_offset;
1993 }
1994
1995
1996
1997 void MacroAssembler::decrementl(Register reg, int value) {
1998 if (value == min_jint) {subl(reg, value) ; return; }
1999 if (value < 0) { incrementl(reg, -value); return; }
2000 if (value == 0) { ; return; }
2001 if (value == 1 && UseIncDec) { decl(reg) ; return; }
2002 /* else */ { subl(reg, value) ; return; }
2003 }
2004
2005 void MacroAssembler::decrementl(Address dst, int value) {
2006 if (value == min_jint) {subl(dst, value) ; return; }
2007 if (value < 0) { incrementl(dst, -value); return; }
2008 if (value == 0) { ; return; }
2009 if (value == 1 && UseIncDec) { decl(dst) ; return; }
2010 /* else */ { subl(dst, value) ; return; }
2011 }
2012
2013 void MacroAssembler::division_with_shift (Register reg, int shift_value) {
2014 assert(shift_value > 0, "illegal shift value");
2015 Label _is_positive;
2016 testl (reg, reg);
2017 jcc (Assembler::positive, _is_positive);
2018 int offset = (1 << shift_value) - 1 ;
2019
2020 if (offset == 1) {
2021 incrementl(reg);
2022 } else {
2023 addl(reg, offset);
2024 }
2025
2026 bind (_is_positive);
2027 sarl(reg, shift_value);
2028 }
2029
2030 void MacroAssembler::divsd(XMMRegister dst, AddressLiteral src, Register rscratch) {
2031 assert(rscratch != noreg || always_reachable(src), "missing");
2032
2033 if (reachable(src)) {
2034 Assembler::divsd(dst, as_Address(src));
2035 } else {
2036 lea(rscratch, src);
2037 Assembler::divsd(dst, Address(rscratch, 0));
2038 }
2039 }
2040
2041 void MacroAssembler::divss(XMMRegister dst, AddressLiteral src, Register rscratch) {
2042 assert(rscratch != noreg || always_reachable(src), "missing");
2043
2044 if (reachable(src)) {
2045 Assembler::divss(dst, as_Address(src));
2046 } else {
2047 lea(rscratch, src);
2048 Assembler::divss(dst, Address(rscratch, 0));
2049 }
2050 }
2051
2052 void MacroAssembler::enter() {
2053 push(rbp);
2054 mov(rbp, rsp);
2055 }
2056
2057 void MacroAssembler::post_call_nop() {
2058 if (!Continuations::enabled()) {
2059 return;
2060 }
2061 InstructionMark im(this);
2062 relocate(post_call_nop_Relocation::spec());
2063 InlineSkippedInstructionsCounter skipCounter(this);
2064 emit_int8((uint8_t)0x0f);
2065 emit_int8((uint8_t)0x1f);
2066 emit_int8((uint8_t)0x84);
2067 emit_int8((uint8_t)0x00);
2068 emit_int32(0x00);
2069 }
2070
2071 // A 5 byte nop that is safe for patching (see patch_verified_entry)
2072 void MacroAssembler::fat_nop() {
2073 if (UseAddressNop) {
2074 addr_nop_5();
2075 } else {
2076 emit_int8((uint8_t)0x26); // es:
2077 emit_int8((uint8_t)0x2e); // cs:
2078 emit_int8((uint8_t)0x64); // fs:
2079 emit_int8((uint8_t)0x65); // gs:
2080 emit_int8((uint8_t)0x90);
2081 }
2082 }
2083
2084 #ifndef _LP64
2085 void MacroAssembler::fcmp(Register tmp) {
2086 fcmp(tmp, 1, true, true);
2087 }
2088
2089 void MacroAssembler::fcmp(Register tmp, int index, bool pop_left, bool pop_right) {
2090 assert(!pop_right || pop_left, "usage error");
2091 if (VM_Version::supports_cmov()) {
2092 assert(tmp == noreg, "unneeded temp");
2093 if (pop_left) {
2094 fucomip(index);
2095 } else {
2096 fucomi(index);
2097 }
2098 if (pop_right) {
2099 fpop();
2100 }
2101 } else {
2102 assert(tmp != noreg, "need temp");
2103 if (pop_left) {
2104 if (pop_right) {
2105 fcompp();
2106 } else {
2107 fcomp(index);
2108 }
2109 } else {
2110 fcom(index);
2111 }
2112 // convert FPU condition into eflags condition via rax,
2113 save_rax(tmp);
2114 fwait(); fnstsw_ax();
2115 sahf();
2116 restore_rax(tmp);
2117 }
2118 // condition codes set as follows:
2119 //
2120 // CF (corresponds to C0) if x < y
2121 // PF (corresponds to C2) if unordered
2122 // ZF (corresponds to C3) if x = y
2123 }
2124
2125 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less) {
2126 fcmp2int(dst, unordered_is_less, 1, true, true);
2127 }
2128
2129 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less, int index, bool pop_left, bool pop_right) {
2130 fcmp(VM_Version::supports_cmov() ? noreg : dst, index, pop_left, pop_right);
2131 Label L;
2132 if (unordered_is_less) {
2133 movl(dst, -1);
2134 jcc(Assembler::parity, L);
2135 jcc(Assembler::below , L);
2136 movl(dst, 0);
2137 jcc(Assembler::equal , L);
2138 increment(dst);
2139 } else { // unordered is greater
2140 movl(dst, 1);
2141 jcc(Assembler::parity, L);
2142 jcc(Assembler::above , L);
2143 movl(dst, 0);
2144 jcc(Assembler::equal , L);
2145 decrementl(dst);
2146 }
2147 bind(L);
2148 }
2149
2150 void MacroAssembler::fld_d(AddressLiteral src) {
2151 fld_d(as_Address(src));
2152 }
2153
2154 void MacroAssembler::fld_s(AddressLiteral src) {
2155 fld_s(as_Address(src));
2156 }
2157
2158 void MacroAssembler::fldcw(AddressLiteral src) {
2159 fldcw(as_Address(src));
2160 }
2161
2162 void MacroAssembler::fpop() {
2163 ffree();
2164 fincstp();
2165 }
2166
2167 void MacroAssembler::fremr(Register tmp) {
2168 save_rax(tmp);
2169 { Label L;
2170 bind(L);
2171 fprem();
2172 fwait(); fnstsw_ax();
2173 sahf();
2174 jcc(Assembler::parity, L);
2175 }
2176 restore_rax(tmp);
2177 // Result is in ST0.
2178 // Note: fxch & fpop to get rid of ST1
2179 // (otherwise FPU stack could overflow eventually)
2180 fxch(1);
2181 fpop();
2182 }
2183
2184 void MacroAssembler::empty_FPU_stack() {
2185 if (VM_Version::supports_mmx()) {
2186 emms();
2187 } else {
2188 for (int i = 8; i-- > 0; ) ffree(i);
2189 }
2190 }
2191 #endif // !LP64
2192
2193 void MacroAssembler::mulpd(XMMRegister dst, AddressLiteral src, Register rscratch) {
2194 assert(rscratch != noreg || always_reachable(src), "missing");
2195 if (reachable(src)) {
2196 Assembler::mulpd(dst, as_Address(src));
2197 } else {
2198 lea(rscratch, src);
2199 Assembler::mulpd(dst, Address(rscratch, 0));
2200 }
2201 }
2202
2203 void MacroAssembler::load_float(Address src) {
2204 #ifdef _LP64
2205 movflt(xmm0, src);
2206 #else
2207 if (UseSSE >= 1) {
2208 movflt(xmm0, src);
2209 } else {
2210 fld_s(src);
2211 }
2212 #endif // LP64
2213 }
2214
2215 void MacroAssembler::store_float(Address dst) {
2216 #ifdef _LP64
2217 movflt(dst, xmm0);
2218 #else
2219 if (UseSSE >= 1) {
2220 movflt(dst, xmm0);
2221 } else {
2222 fstp_s(dst);
2223 }
2224 #endif // LP64
2225 }
2226
2227 void MacroAssembler::load_double(Address src) {
2228 #ifdef _LP64
2229 movdbl(xmm0, src);
2230 #else
2231 if (UseSSE >= 2) {
2232 movdbl(xmm0, src);
2233 } else {
2234 fld_d(src);
2235 }
2236 #endif // LP64
2237 }
2238
2239 void MacroAssembler::store_double(Address dst) {
2240 #ifdef _LP64
2241 movdbl(dst, xmm0);
2242 #else
2243 if (UseSSE >= 2) {
2244 movdbl(dst, xmm0);
2245 } else {
2246 fstp_d(dst);
2247 }
2248 #endif // LP64
2249 }
2250
2251 // dst = c = a * b + c
2252 void MacroAssembler::fmad(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c) {
2253 Assembler::vfmadd231sd(c, a, b);
2254 if (dst != c) {
2255 movdbl(dst, c);
2256 }
2257 }
2258
2259 // dst = c = a * b + c
2260 void MacroAssembler::fmaf(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c) {
2261 Assembler::vfmadd231ss(c, a, b);
2262 if (dst != c) {
2263 movflt(dst, c);
2264 }
2265 }
2266
2267 // dst = c = a * b + c
2268 void MacroAssembler::vfmad(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c, int vector_len) {
2269 Assembler::vfmadd231pd(c, a, b, vector_len);
2270 if (dst != c) {
2271 vmovdqu(dst, c);
2272 }
2273 }
2274
2275 // dst = c = a * b + c
2276 void MacroAssembler::vfmaf(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c, int vector_len) {
2277 Assembler::vfmadd231ps(c, a, b, vector_len);
2278 if (dst != c) {
2279 vmovdqu(dst, c);
2280 }
2281 }
2282
2283 // dst = c = a * b + c
2284 void MacroAssembler::vfmad(XMMRegister dst, XMMRegister a, Address b, XMMRegister c, int vector_len) {
2285 Assembler::vfmadd231pd(c, a, b, vector_len);
2286 if (dst != c) {
2287 vmovdqu(dst, c);
2288 }
2289 }
2290
2291 // dst = c = a * b + c
2292 void MacroAssembler::vfmaf(XMMRegister dst, XMMRegister a, Address b, XMMRegister c, int vector_len) {
2293 Assembler::vfmadd231ps(c, a, b, vector_len);
2294 if (dst != c) {
2295 vmovdqu(dst, c);
2296 }
2297 }
2298
2299 void MacroAssembler::incrementl(AddressLiteral dst, Register rscratch) {
2300 assert(rscratch != noreg || always_reachable(dst), "missing");
2301
2302 if (reachable(dst)) {
2303 incrementl(as_Address(dst));
2304 } else {
2305 lea(rscratch, dst);
2306 incrementl(Address(rscratch, 0));
2307 }
2308 }
2309
2310 void MacroAssembler::incrementl(ArrayAddress dst, Register rscratch) {
2311 incrementl(as_Address(dst, rscratch));
2312 }
2313
2314 void MacroAssembler::incrementl(Register reg, int value) {
2315 if (value == min_jint) {addl(reg, value) ; return; }
2316 if (value < 0) { decrementl(reg, -value); return; }
2317 if (value == 0) { ; return; }
2318 if (value == 1 && UseIncDec) { incl(reg) ; return; }
2319 /* else */ { addl(reg, value) ; return; }
2320 }
2321
2322 void MacroAssembler::incrementl(Address dst, int value) {
2323 if (value == min_jint) {addl(dst, value) ; return; }
2324 if (value < 0) { decrementl(dst, -value); return; }
2325 if (value == 0) { ; return; }
2326 if (value == 1 && UseIncDec) { incl(dst) ; return; }
2327 /* else */ { addl(dst, value) ; return; }
2328 }
2329
2330 void MacroAssembler::jump(AddressLiteral dst, Register rscratch) {
2331 assert(rscratch != noreg || always_reachable(dst), "missing");
2332
2333 if (reachable(dst)) {
2334 jmp_literal(dst.target(), dst.rspec());
2335 } else {
2336 lea(rscratch, dst);
2337 jmp(rscratch);
2338 }
2339 }
2340
2341 void MacroAssembler::jump_cc(Condition cc, AddressLiteral dst, Register rscratch) {
2342 assert(rscratch != noreg || always_reachable(dst), "missing");
2343
2344 if (reachable(dst)) {
2345 InstructionMark im(this);
2346 relocate(dst.reloc());
2347 const int short_size = 2;
2348 const int long_size = 6;
2349 int offs = (intptr_t)dst.target() - ((intptr_t)pc());
2350 if (dst.reloc() == relocInfo::none && is8bit(offs - short_size)) {
2351 // 0111 tttn #8-bit disp
2352 emit_int8(0x70 | cc);
2353 emit_int8((offs - short_size) & 0xFF);
2354 } else {
2355 // 0000 1111 1000 tttn #32-bit disp
2356 emit_int8(0x0F);
2357 emit_int8((unsigned char)(0x80 | cc));
2358 emit_int32(offs - long_size);
2359 }
2360 } else {
2361 #ifdef ASSERT
2362 warning("reversing conditional branch");
2363 #endif /* ASSERT */
2364 Label skip;
2365 jccb(reverse[cc], skip);
2366 lea(rscratch, dst);
2367 Assembler::jmp(rscratch);
2368 bind(skip);
2369 }
2370 }
2371
2372 void MacroAssembler::ldmxcsr(AddressLiteral src, Register rscratch) {
2373 assert(rscratch != noreg || always_reachable(src), "missing");
2374
2375 if (reachable(src)) {
2376 Assembler::ldmxcsr(as_Address(src));
2377 } else {
2378 lea(rscratch, src);
2379 Assembler::ldmxcsr(Address(rscratch, 0));
2380 }
2381 }
2382
2383 int MacroAssembler::load_signed_byte(Register dst, Address src) {
2384 int off;
2385 if (LP64_ONLY(true ||) VM_Version::is_P6()) {
2386 off = offset();
2387 movsbl(dst, src); // movsxb
2388 } else {
2389 off = load_unsigned_byte(dst, src);
2390 shll(dst, 24);
2391 sarl(dst, 24);
2392 }
2393 return off;
2394 }
2395
2396 // Note: load_signed_short used to be called load_signed_word.
2397 // Although the 'w' in x86 opcodes refers to the term "word" in the assembler
2398 // manual, which means 16 bits, that usage is found nowhere in HotSpot code.
2399 // The term "word" in HotSpot means a 32- or 64-bit machine word.
2400 int MacroAssembler::load_signed_short(Register dst, Address src) {
2401 int off;
2402 if (LP64_ONLY(true ||) VM_Version::is_P6()) {
2403 // This is dubious to me since it seems safe to do a signed 16 => 64 bit
2404 // version but this is what 64bit has always done. This seems to imply
2405 // that users are only using 32bits worth.
2406 off = offset();
2407 movswl(dst, src); // movsxw
2408 } else {
2409 off = load_unsigned_short(dst, src);
2410 shll(dst, 16);
2411 sarl(dst, 16);
2412 }
2413 return off;
2414 }
2415
2416 int MacroAssembler::load_unsigned_byte(Register dst, Address src) {
2417 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16,
2418 // and "3.9 Partial Register Penalties", p. 22).
2419 int off;
2420 if (LP64_ONLY(true || ) VM_Version::is_P6() || src.uses(dst)) {
2421 off = offset();
2422 movzbl(dst, src); // movzxb
2423 } else {
2424 xorl(dst, dst);
2425 off = offset();
2426 movb(dst, src);
2427 }
2428 return off;
2429 }
2430
2431 // Note: load_unsigned_short used to be called load_unsigned_word.
2432 int MacroAssembler::load_unsigned_short(Register dst, Address src) {
2433 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16,
2434 // and "3.9 Partial Register Penalties", p. 22).
2435 int off;
2436 if (LP64_ONLY(true ||) VM_Version::is_P6() || src.uses(dst)) {
2437 off = offset();
2438 movzwl(dst, src); // movzxw
2439 } else {
2440 xorl(dst, dst);
2441 off = offset();
2442 movw(dst, src);
2443 }
2444 return off;
2445 }
2446
2447 void MacroAssembler::load_sized_value(Register dst, Address src, size_t size_in_bytes, bool is_signed, Register dst2) {
2448 switch (size_in_bytes) {
2449 #ifndef _LP64
2450 case 8:
2451 assert(dst2 != noreg, "second dest register required");
2452 movl(dst, src);
2453 movl(dst2, src.plus_disp(BytesPerInt));
2454 break;
2455 #else
2456 case 8: movq(dst, src); break;
2457 #endif
2458 case 4: movl(dst, src); break;
2459 case 2: is_signed ? load_signed_short(dst, src) : load_unsigned_short(dst, src); break;
2460 case 1: is_signed ? load_signed_byte( dst, src) : load_unsigned_byte( dst, src); break;
2461 default: ShouldNotReachHere();
2462 }
2463 }
2464
2465 void MacroAssembler::store_sized_value(Address dst, Register src, size_t size_in_bytes, Register src2) {
2466 switch (size_in_bytes) {
2467 #ifndef _LP64
2468 case 8:
2469 assert(src2 != noreg, "second source register required");
2470 movl(dst, src);
2471 movl(dst.plus_disp(BytesPerInt), src2);
2472 break;
2473 #else
2474 case 8: movq(dst, src); break;
2475 #endif
2476 case 4: movl(dst, src); break;
2477 case 2: movw(dst, src); break;
2478 case 1: movb(dst, src); break;
2479 default: ShouldNotReachHere();
2480 }
2481 }
2482
2483 void MacroAssembler::mov32(AddressLiteral dst, Register src, Register rscratch) {
2484 assert(rscratch != noreg || always_reachable(dst), "missing");
2485
2486 if (reachable(dst)) {
2487 movl(as_Address(dst), src);
2488 } else {
2489 lea(rscratch, dst);
2490 movl(Address(rscratch, 0), src);
2491 }
2492 }
2493
2494 void MacroAssembler::mov32(Register dst, AddressLiteral src) {
2495 if (reachable(src)) {
2496 movl(dst, as_Address(src));
2497 } else {
2498 lea(dst, src);
2499 movl(dst, Address(dst, 0));
2500 }
2501 }
2502
2503 // C++ bool manipulation
2504
2505 void MacroAssembler::movbool(Register dst, Address src) {
2506 if(sizeof(bool) == 1)
2507 movb(dst, src);
2508 else if(sizeof(bool) == 2)
2509 movw(dst, src);
2510 else if(sizeof(bool) == 4)
2511 movl(dst, src);
2512 else
2513 // unsupported
2514 ShouldNotReachHere();
2515 }
2516
2517 void MacroAssembler::movbool(Address dst, bool boolconst) {
2518 if(sizeof(bool) == 1)
2519 movb(dst, (int) boolconst);
2520 else if(sizeof(bool) == 2)
2521 movw(dst, (int) boolconst);
2522 else if(sizeof(bool) == 4)
2523 movl(dst, (int) boolconst);
2524 else
2525 // unsupported
2526 ShouldNotReachHere();
2527 }
2528
2529 void MacroAssembler::movbool(Address dst, Register src) {
2530 if(sizeof(bool) == 1)
2531 movb(dst, src);
2532 else if(sizeof(bool) == 2)
2533 movw(dst, src);
2534 else if(sizeof(bool) == 4)
2535 movl(dst, src);
2536 else
2537 // unsupported
2538 ShouldNotReachHere();
2539 }
2540
2541 void MacroAssembler::movdl(XMMRegister dst, AddressLiteral src, Register rscratch) {
2542 assert(rscratch != noreg || always_reachable(src), "missing");
2543
2544 if (reachable(src)) {
2545 movdl(dst, as_Address(src));
2546 } else {
2547 lea(rscratch, src);
2548 movdl(dst, Address(rscratch, 0));
2549 }
2550 }
2551
2552 void MacroAssembler::movq(XMMRegister dst, AddressLiteral src, Register rscratch) {
2553 assert(rscratch != noreg || always_reachable(src), "missing");
2554
2555 if (reachable(src)) {
2556 movq(dst, as_Address(src));
2557 } else {
2558 lea(rscratch, src);
2559 movq(dst, Address(rscratch, 0));
2560 }
2561 }
2562
2563 void MacroAssembler::movdbl(XMMRegister dst, AddressLiteral src, Register rscratch) {
2564 assert(rscratch != noreg || always_reachable(src), "missing");
2565
2566 if (reachable(src)) {
2567 if (UseXmmLoadAndClearUpper) {
2568 movsd (dst, as_Address(src));
2569 } else {
2570 movlpd(dst, as_Address(src));
2571 }
2572 } else {
2573 lea(rscratch, src);
2574 if (UseXmmLoadAndClearUpper) {
2575 movsd (dst, Address(rscratch, 0));
2576 } else {
2577 movlpd(dst, Address(rscratch, 0));
2578 }
2579 }
2580 }
2581
2582 void MacroAssembler::movflt(XMMRegister dst, AddressLiteral src, Register rscratch) {
2583 assert(rscratch != noreg || always_reachable(src), "missing");
2584
2585 if (reachable(src)) {
2586 movss(dst, as_Address(src));
2587 } else {
2588 lea(rscratch, src);
2589 movss(dst, Address(rscratch, 0));
2590 }
2591 }
2592
2593 void MacroAssembler::movptr(Register dst, Register src) {
2594 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src));
2595 }
2596
2597 void MacroAssembler::movptr(Register dst, Address src) {
2598 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src));
2599 }
2600
2601 // src should NEVER be a real pointer. Use AddressLiteral for true pointers
2602 void MacroAssembler::movptr(Register dst, intptr_t src) {
2603 #ifdef _LP64
2604 if (is_uimm32(src)) {
2605 movl(dst, checked_cast<uint32_t>(src));
2606 } else if (is_simm32(src)) {
2607 movq(dst, checked_cast<int32_t>(src));
2608 } else {
2609 mov64(dst, src);
2610 }
2611 #else
2612 movl(dst, src);
2613 #endif
2614 }
2615
2616 void MacroAssembler::movptr(Address dst, Register src) {
2617 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src));
2618 }
2619
2620 void MacroAssembler::movptr(Address dst, int32_t src) {
2621 LP64_ONLY(movslq(dst, src)) NOT_LP64(movl(dst, src));
2622 }
2623
2624 void MacroAssembler::movdqu(Address dst, XMMRegister src) {
2625 assert(((src->encoding() < 16) || VM_Version::supports_avx512vl()),"XMM register should be 0-15");
2626 Assembler::movdqu(dst, src);
2627 }
2628
2629 void MacroAssembler::movdqu(XMMRegister dst, Address src) {
2630 assert(((dst->encoding() < 16) || VM_Version::supports_avx512vl()),"XMM register should be 0-15");
2631 Assembler::movdqu(dst, src);
2632 }
2633
2634 void MacroAssembler::movdqu(XMMRegister dst, XMMRegister src) {
2635 assert(((dst->encoding() < 16 && src->encoding() < 16) || VM_Version::supports_avx512vl()),"XMM register should be 0-15");
2636 Assembler::movdqu(dst, src);
2637 }
2638
2639 void MacroAssembler::movdqu(XMMRegister dst, AddressLiteral src, Register rscratch) {
2640 assert(rscratch != noreg || always_reachable(src), "missing");
2641
2642 if (reachable(src)) {
2643 movdqu(dst, as_Address(src));
2644 } else {
2645 lea(rscratch, src);
2646 movdqu(dst, Address(rscratch, 0));
2647 }
2648 }
2649
2650 void MacroAssembler::vmovdqu(Address dst, XMMRegister src) {
2651 assert(((src->encoding() < 16) || VM_Version::supports_avx512vl()),"XMM register should be 0-15");
2652 Assembler::vmovdqu(dst, src);
2653 }
2654
2655 void MacroAssembler::vmovdqu(XMMRegister dst, Address src) {
2656 assert(((dst->encoding() < 16) || VM_Version::supports_avx512vl()),"XMM register should be 0-15");
2657 Assembler::vmovdqu(dst, src);
2658 }
2659
2660 void MacroAssembler::vmovdqu(XMMRegister dst, XMMRegister src) {
2661 assert(((dst->encoding() < 16 && src->encoding() < 16) || VM_Version::supports_avx512vl()),"XMM register should be 0-15");
2662 Assembler::vmovdqu(dst, src);
2663 }
2664
2665 void MacroAssembler::vmovdqu(XMMRegister dst, AddressLiteral src, Register rscratch) {
2666 assert(rscratch != noreg || always_reachable(src), "missing");
2667
2668 if (reachable(src)) {
2669 vmovdqu(dst, as_Address(src));
2670 }
2671 else {
2672 lea(rscratch, src);
2673 vmovdqu(dst, Address(rscratch, 0));
2674 }
2675 }
2676
2677 void MacroAssembler::vmovdqu(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2678 assert(rscratch != noreg || always_reachable(src), "missing");
2679
2680 if (vector_len == AVX_512bit) {
2681 evmovdquq(dst, src, AVX_512bit, rscratch);
2682 } else if (vector_len == AVX_256bit) {
2683 vmovdqu(dst, src, rscratch);
2684 } else {
2685 movdqu(dst, src, rscratch);
2686 }
2687 }
2688
2689 void MacroAssembler::kmov(KRegister dst, Address src) {
2690 if (VM_Version::supports_avx512bw()) {
2691 kmovql(dst, src);
2692 } else {
2693 assert(VM_Version::supports_evex(), "");
2694 kmovwl(dst, src);
2695 }
2696 }
2697
2698 void MacroAssembler::kmov(Address dst, KRegister src) {
2699 if (VM_Version::supports_avx512bw()) {
2700 kmovql(dst, src);
2701 } else {
2702 assert(VM_Version::supports_evex(), "");
2703 kmovwl(dst, src);
2704 }
2705 }
2706
2707 void MacroAssembler::kmov(KRegister dst, KRegister src) {
2708 if (VM_Version::supports_avx512bw()) {
2709 kmovql(dst, src);
2710 } else {
2711 assert(VM_Version::supports_evex(), "");
2712 kmovwl(dst, src);
2713 }
2714 }
2715
2716 void MacroAssembler::kmov(Register dst, KRegister src) {
2717 if (VM_Version::supports_avx512bw()) {
2718 kmovql(dst, src);
2719 } else {
2720 assert(VM_Version::supports_evex(), "");
2721 kmovwl(dst, src);
2722 }
2723 }
2724
2725 void MacroAssembler::kmov(KRegister dst, Register src) {
2726 if (VM_Version::supports_avx512bw()) {
2727 kmovql(dst, src);
2728 } else {
2729 assert(VM_Version::supports_evex(), "");
2730 kmovwl(dst, src);
2731 }
2732 }
2733
2734 void MacroAssembler::kmovql(KRegister dst, AddressLiteral src, Register rscratch) {
2735 assert(rscratch != noreg || always_reachable(src), "missing");
2736
2737 if (reachable(src)) {
2738 kmovql(dst, as_Address(src));
2739 } else {
2740 lea(rscratch, src);
2741 kmovql(dst, Address(rscratch, 0));
2742 }
2743 }
2744
2745 void MacroAssembler::kmovwl(KRegister dst, AddressLiteral src, Register rscratch) {
2746 assert(rscratch != noreg || always_reachable(src), "missing");
2747
2748 if (reachable(src)) {
2749 kmovwl(dst, as_Address(src));
2750 } else {
2751 lea(rscratch, src);
2752 kmovwl(dst, Address(rscratch, 0));
2753 }
2754 }
2755
2756 void MacroAssembler::evmovdqub(XMMRegister dst, KRegister mask, AddressLiteral src, bool merge,
2757 int vector_len, Register rscratch) {
2758 assert(rscratch != noreg || always_reachable(src), "missing");
2759
2760 if (reachable(src)) {
2761 Assembler::evmovdqub(dst, mask, as_Address(src), merge, vector_len);
2762 } else {
2763 lea(rscratch, src);
2764 Assembler::evmovdqub(dst, mask, Address(rscratch, 0), merge, vector_len);
2765 }
2766 }
2767
2768 void MacroAssembler::evmovdquw(XMMRegister dst, KRegister mask, AddressLiteral src, bool merge,
2769 int vector_len, Register rscratch) {
2770 assert(rscratch != noreg || always_reachable(src), "missing");
2771
2772 if (reachable(src)) {
2773 Assembler::evmovdquw(dst, mask, as_Address(src), merge, vector_len);
2774 } else {
2775 lea(rscratch, src);
2776 Assembler::evmovdquw(dst, mask, Address(rscratch, 0), merge, vector_len);
2777 }
2778 }
2779
2780 void MacroAssembler::evmovdqul(XMMRegister dst, KRegister mask, AddressLiteral src, bool merge, int vector_len, Register rscratch) {
2781 assert(rscratch != noreg || always_reachable(src), "missing");
2782
2783 if (reachable(src)) {
2784 Assembler::evmovdqul(dst, mask, as_Address(src), merge, vector_len);
2785 } else {
2786 lea(rscratch, src);
2787 Assembler::evmovdqul(dst, mask, Address(rscratch, 0), merge, vector_len);
2788 }
2789 }
2790
2791 void MacroAssembler::evmovdquq(XMMRegister dst, KRegister mask, AddressLiteral src, bool merge, int vector_len, Register rscratch) {
2792 assert(rscratch != noreg || always_reachable(src), "missing");
2793
2794 if (reachable(src)) {
2795 Assembler::evmovdquq(dst, mask, as_Address(src), merge, vector_len);
2796 } else {
2797 lea(rscratch, src);
2798 Assembler::evmovdquq(dst, mask, Address(rscratch, 0), merge, vector_len);
2799 }
2800 }
2801
2802 void MacroAssembler::evmovdquq(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2803 assert(rscratch != noreg || always_reachable(src), "missing");
2804
2805 if (reachable(src)) {
2806 Assembler::evmovdquq(dst, as_Address(src), vector_len);
2807 } else {
2808 lea(rscratch, src);
2809 Assembler::evmovdquq(dst, Address(rscratch, 0), vector_len);
2810 }
2811 }
2812
2813 void MacroAssembler::movdqa(XMMRegister dst, AddressLiteral src, Register rscratch) {
2814 assert(rscratch != noreg || always_reachable(src), "missing");
2815
2816 if (reachable(src)) {
2817 Assembler::movdqa(dst, as_Address(src));
2818 } else {
2819 lea(rscratch, src);
2820 Assembler::movdqa(dst, Address(rscratch, 0));
2821 }
2822 }
2823
2824 void MacroAssembler::movsd(XMMRegister dst, AddressLiteral src, Register rscratch) {
2825 assert(rscratch != noreg || always_reachable(src), "missing");
2826
2827 if (reachable(src)) {
2828 Assembler::movsd(dst, as_Address(src));
2829 } else {
2830 lea(rscratch, src);
2831 Assembler::movsd(dst, Address(rscratch, 0));
2832 }
2833 }
2834
2835 void MacroAssembler::movss(XMMRegister dst, AddressLiteral src, Register rscratch) {
2836 assert(rscratch != noreg || always_reachable(src), "missing");
2837
2838 if (reachable(src)) {
2839 Assembler::movss(dst, as_Address(src));
2840 } else {
2841 lea(rscratch, src);
2842 Assembler::movss(dst, Address(rscratch, 0));
2843 }
2844 }
2845
2846 void MacroAssembler::movddup(XMMRegister dst, AddressLiteral src, Register rscratch) {
2847 assert(rscratch != noreg || always_reachable(src), "missing");
2848
2849 if (reachable(src)) {
2850 Assembler::movddup(dst, as_Address(src));
2851 } else {
2852 lea(rscratch, src);
2853 Assembler::movddup(dst, Address(rscratch, 0));
2854 }
2855 }
2856
2857 void MacroAssembler::vmovddup(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2858 assert(rscratch != noreg || always_reachable(src), "missing");
2859
2860 if (reachable(src)) {
2861 Assembler::vmovddup(dst, as_Address(src), vector_len);
2862 } else {
2863 lea(rscratch, src);
2864 Assembler::vmovddup(dst, Address(rscratch, 0), vector_len);
2865 }
2866 }
2867
2868 void MacroAssembler::mulsd(XMMRegister dst, AddressLiteral src, Register rscratch) {
2869 assert(rscratch != noreg || always_reachable(src), "missing");
2870
2871 if (reachable(src)) {
2872 Assembler::mulsd(dst, as_Address(src));
2873 } else {
2874 lea(rscratch, src);
2875 Assembler::mulsd(dst, Address(rscratch, 0));
2876 }
2877 }
2878
2879 void MacroAssembler::mulss(XMMRegister dst, AddressLiteral src, Register rscratch) {
2880 assert(rscratch != noreg || always_reachable(src), "missing");
2881
2882 if (reachable(src)) {
2883 Assembler::mulss(dst, as_Address(src));
2884 } else {
2885 lea(rscratch, src);
2886 Assembler::mulss(dst, Address(rscratch, 0));
2887 }
2888 }
2889
2890 void MacroAssembler::null_check(Register reg, int offset) {
2891 if (needs_explicit_null_check(offset)) {
2892 // provoke OS null exception if reg is null by
2893 // accessing M[reg] w/o changing any (non-CC) registers
2894 // NOTE: cmpl is plenty here to provoke a segv
2895 cmpptr(rax, Address(reg, 0));
2896 // Note: should probably use testl(rax, Address(reg, 0));
2897 // may be shorter code (however, this version of
2898 // testl needs to be implemented first)
2899 } else {
2900 // nothing to do, (later) access of M[reg + offset]
2901 // will provoke OS null exception if reg is null
2902 }
2903 }
2904
2905 void MacroAssembler::os_breakpoint() {
2906 // instead of directly emitting a breakpoint, call os:breakpoint for better debugability
2907 // (e.g., MSVC can't call ps() otherwise)
2908 call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint)));
2909 }
2910
2911 void MacroAssembler::unimplemented(const char* what) {
2912 const char* buf = nullptr;
2913 {
2914 ResourceMark rm;
2915 stringStream ss;
2916 ss.print("unimplemented: %s", what);
2917 buf = code_string(ss.as_string());
2918 }
2919 stop(buf);
2920 }
2921
2922 #ifdef _LP64
2923 #define XSTATE_BV 0x200
2924 #endif
2925
2926 void MacroAssembler::pop_CPU_state() {
2927 pop_FPU_state();
2928 pop_IU_state();
2929 }
2930
2931 void MacroAssembler::pop_FPU_state() {
2932 #ifndef _LP64
2933 frstor(Address(rsp, 0));
2934 #else
2935 fxrstor(Address(rsp, 0));
2936 #endif
2937 addptr(rsp, FPUStateSizeInWords * wordSize);
2938 }
2939
2940 void MacroAssembler::pop_IU_state() {
2941 popa();
2942 LP64_ONLY(addq(rsp, 8));
2943 popf();
2944 }
2945
2946 // Save Integer and Float state
2947 // Warning: Stack must be 16 byte aligned (64bit)
2948 void MacroAssembler::push_CPU_state() {
2949 push_IU_state();
2950 push_FPU_state();
2951 }
2952
2953 void MacroAssembler::push_FPU_state() {
2954 subptr(rsp, FPUStateSizeInWords * wordSize);
2955 #ifndef _LP64
2956 fnsave(Address(rsp, 0));
2957 fwait();
2958 #else
2959 fxsave(Address(rsp, 0));
2960 #endif // LP64
2961 }
2962
2963 void MacroAssembler::push_IU_state() {
2964 // Push flags first because pusha kills them
2965 pushf();
2966 // Make sure rsp stays 16-byte aligned
2967 LP64_ONLY(subq(rsp, 8));
2968 pusha();
2969 }
2970
2971 void MacroAssembler::push_cont_fastpath() {
2972 if (!Continuations::enabled()) return;
2973
2974 #ifndef _LP64
2975 Register rthread = rax;
2976 Register rrealsp = rbx;
2977 push(rthread);
2978 push(rrealsp);
2979
2980 get_thread(rthread);
2981
2982 // The code below wants the original RSP.
2983 // Move it back after the pushes above.
2984 movptr(rrealsp, rsp);
2985 addptr(rrealsp, 2*wordSize);
2986 #else
2987 Register rthread = r15_thread;
2988 Register rrealsp = rsp;
2989 #endif
2990
2991 Label done;
2992 cmpptr(rrealsp, Address(rthread, JavaThread::cont_fastpath_offset()));
2993 jccb(Assembler::belowEqual, done);
2994 movptr(Address(rthread, JavaThread::cont_fastpath_offset()), rrealsp);
2995 bind(done);
2996
2997 #ifndef _LP64
2998 pop(rrealsp);
2999 pop(rthread);
3000 #endif
3001 }
3002
3003 void MacroAssembler::pop_cont_fastpath() {
3004 if (!Continuations::enabled()) return;
3005
3006 #ifndef _LP64
3007 Register rthread = rax;
3008 Register rrealsp = rbx;
3009 push(rthread);
3010 push(rrealsp);
3011
3012 get_thread(rthread);
3013
3014 // The code below wants the original RSP.
3015 // Move it back after the pushes above.
3016 movptr(rrealsp, rsp);
3017 addptr(rrealsp, 2*wordSize);
3018 #else
3019 Register rthread = r15_thread;
3020 Register rrealsp = rsp;
3021 #endif
3022
3023 Label done;
3024 cmpptr(rrealsp, Address(rthread, JavaThread::cont_fastpath_offset()));
3025 jccb(Assembler::below, done);
3026 movptr(Address(rthread, JavaThread::cont_fastpath_offset()), 0);
3027 bind(done);
3028
3029 #ifndef _LP64
3030 pop(rrealsp);
3031 pop(rthread);
3032 #endif
3033 }
3034
3035 void MacroAssembler::inc_held_monitor_count() {
3036 #ifndef _LP64
3037 Register thread = rax;
3038 push(thread);
3039 get_thread(thread);
3040 incrementl(Address(thread, JavaThread::held_monitor_count_offset()));
3041 pop(thread);
3042 #else // LP64
3043 incrementq(Address(r15_thread, JavaThread::held_monitor_count_offset()));
3044 #endif
3045 }
3046
3047 void MacroAssembler::dec_held_monitor_count() {
3048 #ifndef _LP64
3049 Register thread = rax;
3050 push(thread);
3051 get_thread(thread);
3052 decrementl(Address(thread, JavaThread::held_monitor_count_offset()));
3053 pop(thread);
3054 #else // LP64
3055 decrementq(Address(r15_thread, JavaThread::held_monitor_count_offset()));
3056 #endif
3057 }
3058
3059 #ifdef ASSERT
3060 void MacroAssembler::stop_if_in_cont(Register cont, const char* name) {
3061 #ifdef _LP64
3062 Label no_cont;
3063 movptr(cont, Address(r15_thread, JavaThread::cont_entry_offset()));
3064 testl(cont, cont);
3065 jcc(Assembler::zero, no_cont);
3066 stop(name);
3067 bind(no_cont);
3068 #else
3069 Unimplemented();
3070 #endif
3071 }
3072 #endif
3073
3074 void MacroAssembler::reset_last_Java_frame(Register java_thread, bool clear_fp) { // determine java_thread register
3075 if (!java_thread->is_valid()) {
3076 java_thread = rdi;
3077 get_thread(java_thread);
3078 }
3079 // we must set sp to zero to clear frame
3080 movptr(Address(java_thread, JavaThread::last_Java_sp_offset()), NULL_WORD);
3081 // must clear fp, so that compiled frames are not confused; it is
3082 // possible that we need it only for debugging
3083 if (clear_fp) {
3084 movptr(Address(java_thread, JavaThread::last_Java_fp_offset()), NULL_WORD);
3085 }
3086 // Always clear the pc because it could have been set by make_walkable()
3087 movptr(Address(java_thread, JavaThread::last_Java_pc_offset()), NULL_WORD);
3088 vzeroupper();
3089 }
3090
3091 void MacroAssembler::restore_rax(Register tmp) {
3092 if (tmp == noreg) pop(rax);
3093 else if (tmp != rax) mov(rax, tmp);
3094 }
3095
3096 void MacroAssembler::round_to(Register reg, int modulus) {
3097 addptr(reg, modulus - 1);
3098 andptr(reg, -modulus);
3099 }
3100
3101 void MacroAssembler::save_rax(Register tmp) {
3102 if (tmp == noreg) push(rax);
3103 else if (tmp != rax) mov(tmp, rax);
3104 }
3105
3106 void MacroAssembler::safepoint_poll(Label& slow_path, Register thread_reg, bool at_return, bool in_nmethod) {
3107 if (at_return) {
3108 // Note that when in_nmethod is set, the stack pointer is incremented before the poll. Therefore,
3109 // we may safely use rsp instead to perform the stack watermark check.
3110 cmpptr(in_nmethod ? rsp : rbp, Address(thread_reg, JavaThread::polling_word_offset()));
3111 jcc(Assembler::above, slow_path);
3112 return;
3113 }
3114 testb(Address(thread_reg, JavaThread::polling_word_offset()), SafepointMechanism::poll_bit());
3115 jcc(Assembler::notZero, slow_path); // handshake bit set implies poll
3116 }
3117
3118 // Calls to C land
3119 //
3120 // When entering C land, the rbp, & rsp of the last Java frame have to be recorded
3121 // in the (thread-local) JavaThread object. When leaving C land, the last Java fp
3122 // has to be reset to 0. This is required to allow proper stack traversal.
3123 void MacroAssembler::set_last_Java_frame(Register java_thread,
3124 Register last_java_sp,
3125 Register last_java_fp,
3126 address last_java_pc,
3127 Register rscratch) {
3128 vzeroupper();
3129 // determine java_thread register
3130 if (!java_thread->is_valid()) {
3131 java_thread = rdi;
3132 get_thread(java_thread);
3133 }
3134 // determine last_java_sp register
3135 if (!last_java_sp->is_valid()) {
3136 last_java_sp = rsp;
3137 }
3138 // last_java_fp is optional
3139 if (last_java_fp->is_valid()) {
3140 movptr(Address(java_thread, JavaThread::last_Java_fp_offset()), last_java_fp);
3141 }
3142 // last_java_pc is optional
3143 if (last_java_pc != nullptr) {
3144 Address java_pc(java_thread,
3145 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset());
3146 lea(java_pc, InternalAddress(last_java_pc), rscratch);
3147 }
3148 movptr(Address(java_thread, JavaThread::last_Java_sp_offset()), last_java_sp);
3149 }
3150
3151 void MacroAssembler::shlptr(Register dst, int imm8) {
3152 LP64_ONLY(shlq(dst, imm8)) NOT_LP64(shll(dst, imm8));
3153 }
3154
3155 void MacroAssembler::shrptr(Register dst, int imm8) {
3156 LP64_ONLY(shrq(dst, imm8)) NOT_LP64(shrl(dst, imm8));
3157 }
3158
3159 void MacroAssembler::sign_extend_byte(Register reg) {
3160 if (LP64_ONLY(true ||) (VM_Version::is_P6() && reg->has_byte_register())) {
3161 movsbl(reg, reg); // movsxb
3162 } else {
3163 shll(reg, 24);
3164 sarl(reg, 24);
3165 }
3166 }
3167
3168 void MacroAssembler::sign_extend_short(Register reg) {
3169 if (LP64_ONLY(true ||) VM_Version::is_P6()) {
3170 movswl(reg, reg); // movsxw
3171 } else {
3172 shll(reg, 16);
3173 sarl(reg, 16);
3174 }
3175 }
3176
3177 void MacroAssembler::testl(Address dst, int32_t imm32) {
3178 if (imm32 >= 0 && is8bit(imm32)) {
3179 testb(dst, imm32);
3180 } else {
3181 Assembler::testl(dst, imm32);
3182 }
3183 }
3184
3185 void MacroAssembler::testl(Register dst, int32_t imm32) {
3186 if (imm32 >= 0 && is8bit(imm32) && dst->has_byte_register()) {
3187 testb(dst, imm32);
3188 } else {
3189 Assembler::testl(dst, imm32);
3190 }
3191 }
3192
3193 void MacroAssembler::testl(Register dst, AddressLiteral src) {
3194 assert(always_reachable(src), "Address should be reachable");
3195 testl(dst, as_Address(src));
3196 }
3197
3198 #ifdef _LP64
3199
3200 void MacroAssembler::testq(Address dst, int32_t imm32) {
3201 if (imm32 >= 0) {
3202 testl(dst, imm32);
3203 } else {
3204 Assembler::testq(dst, imm32);
3205 }
3206 }
3207
3208 void MacroAssembler::testq(Register dst, int32_t imm32) {
3209 if (imm32 >= 0) {
3210 testl(dst, imm32);
3211 } else {
3212 Assembler::testq(dst, imm32);
3213 }
3214 }
3215
3216 #endif
3217
3218 void MacroAssembler::pcmpeqb(XMMRegister dst, XMMRegister src) {
3219 assert(((dst->encoding() < 16 && src->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3220 Assembler::pcmpeqb(dst, src);
3221 }
3222
3223 void MacroAssembler::pcmpeqw(XMMRegister dst, XMMRegister src) {
3224 assert(((dst->encoding() < 16 && src->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3225 Assembler::pcmpeqw(dst, src);
3226 }
3227
3228 void MacroAssembler::pcmpestri(XMMRegister dst, Address src, int imm8) {
3229 assert((dst->encoding() < 16),"XMM register should be 0-15");
3230 Assembler::pcmpestri(dst, src, imm8);
3231 }
3232
3233 void MacroAssembler::pcmpestri(XMMRegister dst, XMMRegister src, int imm8) {
3234 assert((dst->encoding() < 16 && src->encoding() < 16),"XMM register should be 0-15");
3235 Assembler::pcmpestri(dst, src, imm8);
3236 }
3237
3238 void MacroAssembler::pmovzxbw(XMMRegister dst, XMMRegister src) {
3239 assert(((dst->encoding() < 16 && src->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3240 Assembler::pmovzxbw(dst, src);
3241 }
3242
3243 void MacroAssembler::pmovzxbw(XMMRegister dst, Address src) {
3244 assert(((dst->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3245 Assembler::pmovzxbw(dst, src);
3246 }
3247
3248 void MacroAssembler::pmovmskb(Register dst, XMMRegister src) {
3249 assert((src->encoding() < 16),"XMM register should be 0-15");
3250 Assembler::pmovmskb(dst, src);
3251 }
3252
3253 void MacroAssembler::ptest(XMMRegister dst, XMMRegister src) {
3254 assert((dst->encoding() < 16 && src->encoding() < 16),"XMM register should be 0-15");
3255 Assembler::ptest(dst, src);
3256 }
3257
3258 void MacroAssembler::sqrtss(XMMRegister dst, AddressLiteral src, Register rscratch) {
3259 assert(rscratch != noreg || always_reachable(src), "missing");
3260
3261 if (reachable(src)) {
3262 Assembler::sqrtss(dst, as_Address(src));
3263 } else {
3264 lea(rscratch, src);
3265 Assembler::sqrtss(dst, Address(rscratch, 0));
3266 }
3267 }
3268
3269 void MacroAssembler::subsd(XMMRegister dst, AddressLiteral src, Register rscratch) {
3270 assert(rscratch != noreg || always_reachable(src), "missing");
3271
3272 if (reachable(src)) {
3273 Assembler::subsd(dst, as_Address(src));
3274 } else {
3275 lea(rscratch, src);
3276 Assembler::subsd(dst, Address(rscratch, 0));
3277 }
3278 }
3279
3280 void MacroAssembler::roundsd(XMMRegister dst, AddressLiteral src, int32_t rmode, Register rscratch) {
3281 assert(rscratch != noreg || always_reachable(src), "missing");
3282
3283 if (reachable(src)) {
3284 Assembler::roundsd(dst, as_Address(src), rmode);
3285 } else {
3286 lea(rscratch, src);
3287 Assembler::roundsd(dst, Address(rscratch, 0), rmode);
3288 }
3289 }
3290
3291 void MacroAssembler::subss(XMMRegister dst, AddressLiteral src, Register rscratch) {
3292 assert(rscratch != noreg || always_reachable(src), "missing");
3293
3294 if (reachable(src)) {
3295 Assembler::subss(dst, as_Address(src));
3296 } else {
3297 lea(rscratch, src);
3298 Assembler::subss(dst, Address(rscratch, 0));
3299 }
3300 }
3301
3302 void MacroAssembler::ucomisd(XMMRegister dst, AddressLiteral src, Register rscratch) {
3303 assert(rscratch != noreg || always_reachable(src), "missing");
3304
3305 if (reachable(src)) {
3306 Assembler::ucomisd(dst, as_Address(src));
3307 } else {
3308 lea(rscratch, src);
3309 Assembler::ucomisd(dst, Address(rscratch, 0));
3310 }
3311 }
3312
3313 void MacroAssembler::ucomiss(XMMRegister dst, AddressLiteral src, Register rscratch) {
3314 assert(rscratch != noreg || always_reachable(src), "missing");
3315
3316 if (reachable(src)) {
3317 Assembler::ucomiss(dst, as_Address(src));
3318 } else {
3319 lea(rscratch, src);
3320 Assembler::ucomiss(dst, Address(rscratch, 0));
3321 }
3322 }
3323
3324 void MacroAssembler::xorpd(XMMRegister dst, AddressLiteral src, Register rscratch) {
3325 assert(rscratch != noreg || always_reachable(src), "missing");
3326
3327 // Used in sign-bit flipping with aligned address.
3328 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
3329 if (reachable(src)) {
3330 Assembler::xorpd(dst, as_Address(src));
3331 } else {
3332 lea(rscratch, src);
3333 Assembler::xorpd(dst, Address(rscratch, 0));
3334 }
3335 }
3336
3337 void MacroAssembler::xorpd(XMMRegister dst, XMMRegister src) {
3338 if (UseAVX > 2 && !VM_Version::supports_avx512dq() && (dst->encoding() == src->encoding())) {
3339 Assembler::vpxor(dst, dst, src, Assembler::AVX_512bit);
3340 }
3341 else {
3342 Assembler::xorpd(dst, src);
3343 }
3344 }
3345
3346 void MacroAssembler::xorps(XMMRegister dst, XMMRegister src) {
3347 if (UseAVX > 2 && !VM_Version::supports_avx512dq() && (dst->encoding() == src->encoding())) {
3348 Assembler::vpxor(dst, dst, src, Assembler::AVX_512bit);
3349 } else {
3350 Assembler::xorps(dst, src);
3351 }
3352 }
3353
3354 void MacroAssembler::xorps(XMMRegister dst, AddressLiteral src, Register rscratch) {
3355 assert(rscratch != noreg || always_reachable(src), "missing");
3356
3357 // Used in sign-bit flipping with aligned address.
3358 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
3359 if (reachable(src)) {
3360 Assembler::xorps(dst, as_Address(src));
3361 } else {
3362 lea(rscratch, src);
3363 Assembler::xorps(dst, Address(rscratch, 0));
3364 }
3365 }
3366
3367 void MacroAssembler::pshufb(XMMRegister dst, AddressLiteral src, Register rscratch) {
3368 assert(rscratch != noreg || always_reachable(src), "missing");
3369
3370 // Used in sign-bit flipping with aligned address.
3371 bool aligned_adr = (((intptr_t)src.target() & 15) == 0);
3372 assert((UseAVX > 0) || aligned_adr, "SSE mode requires address alignment 16 bytes");
3373 if (reachable(src)) {
3374 Assembler::pshufb(dst, as_Address(src));
3375 } else {
3376 lea(rscratch, src);
3377 Assembler::pshufb(dst, Address(rscratch, 0));
3378 }
3379 }
3380
3381 // AVX 3-operands instructions
3382
3383 void MacroAssembler::vaddsd(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3384 assert(rscratch != noreg || always_reachable(src), "missing");
3385
3386 if (reachable(src)) {
3387 vaddsd(dst, nds, as_Address(src));
3388 } else {
3389 lea(rscratch, src);
3390 vaddsd(dst, nds, Address(rscratch, 0));
3391 }
3392 }
3393
3394 void MacroAssembler::vaddss(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3395 assert(rscratch != noreg || always_reachable(src), "missing");
3396
3397 if (reachable(src)) {
3398 vaddss(dst, nds, as_Address(src));
3399 } else {
3400 lea(rscratch, src);
3401 vaddss(dst, nds, Address(rscratch, 0));
3402 }
3403 }
3404
3405 void MacroAssembler::vpaddb(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3406 assert(UseAVX > 0, "requires some form of AVX");
3407 assert(rscratch != noreg || always_reachable(src), "missing");
3408
3409 if (reachable(src)) {
3410 Assembler::vpaddb(dst, nds, as_Address(src), vector_len);
3411 } else {
3412 lea(rscratch, src);
3413 Assembler::vpaddb(dst, nds, Address(rscratch, 0), vector_len);
3414 }
3415 }
3416
3417 void MacroAssembler::vpaddd(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3418 assert(UseAVX > 0, "requires some form of AVX");
3419 assert(rscratch != noreg || always_reachable(src), "missing");
3420
3421 if (reachable(src)) {
3422 Assembler::vpaddd(dst, nds, as_Address(src), vector_len);
3423 } else {
3424 lea(rscratch, src);
3425 Assembler::vpaddd(dst, nds, Address(rscratch, 0), vector_len);
3426 }
3427 }
3428
3429 void MacroAssembler::vabsss(XMMRegister dst, XMMRegister nds, XMMRegister src, AddressLiteral negate_field, int vector_len, Register rscratch) {
3430 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vldq()),"XMM register should be 0-15");
3431 assert(rscratch != noreg || always_reachable(negate_field), "missing");
3432
3433 vandps(dst, nds, negate_field, vector_len, rscratch);
3434 }
3435
3436 void MacroAssembler::vabssd(XMMRegister dst, XMMRegister nds, XMMRegister src, AddressLiteral negate_field, int vector_len, Register rscratch) {
3437 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vldq()),"XMM register should be 0-15");
3438 assert(rscratch != noreg || always_reachable(negate_field), "missing");
3439
3440 vandpd(dst, nds, negate_field, vector_len, rscratch);
3441 }
3442
3443 void MacroAssembler::vpaddb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
3444 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3445 Assembler::vpaddb(dst, nds, src, vector_len);
3446 }
3447
3448 void MacroAssembler::vpaddb(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
3449 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3450 Assembler::vpaddb(dst, nds, src, vector_len);
3451 }
3452
3453 void MacroAssembler::vpaddw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
3454 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3455 Assembler::vpaddw(dst, nds, src, vector_len);
3456 }
3457
3458 void MacroAssembler::vpaddw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
3459 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3460 Assembler::vpaddw(dst, nds, src, vector_len);
3461 }
3462
3463 void MacroAssembler::vpand(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3464 assert(rscratch != noreg || always_reachable(src), "missing");
3465
3466 if (reachable(src)) {
3467 Assembler::vpand(dst, nds, as_Address(src), vector_len);
3468 } else {
3469 lea(rscratch, src);
3470 Assembler::vpand(dst, nds, Address(rscratch, 0), vector_len);
3471 }
3472 }
3473
3474 void MacroAssembler::vpbroadcastd(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
3475 assert(rscratch != noreg || always_reachable(src), "missing");
3476
3477 if (reachable(src)) {
3478 Assembler::vpbroadcastd(dst, as_Address(src), vector_len);
3479 } else {
3480 lea(rscratch, src);
3481 Assembler::vpbroadcastd(dst, Address(rscratch, 0), vector_len);
3482 }
3483 }
3484
3485 void MacroAssembler::vpbroadcastq(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
3486 assert(rscratch != noreg || always_reachable(src), "missing");
3487
3488 if (reachable(src)) {
3489 Assembler::vpbroadcastq(dst, as_Address(src), vector_len);
3490 } else {
3491 lea(rscratch, src);
3492 Assembler::vpbroadcastq(dst, Address(rscratch, 0), vector_len);
3493 }
3494 }
3495
3496 void MacroAssembler::vbroadcastsd(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
3497 assert(rscratch != noreg || always_reachable(src), "missing");
3498
3499 if (reachable(src)) {
3500 Assembler::vbroadcastsd(dst, as_Address(src), vector_len);
3501 } else {
3502 lea(rscratch, src);
3503 Assembler::vbroadcastsd(dst, Address(rscratch, 0), vector_len);
3504 }
3505 }
3506
3507 void MacroAssembler::vbroadcastss(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
3508 assert(rscratch != noreg || always_reachable(src), "missing");
3509
3510 if (reachable(src)) {
3511 Assembler::vbroadcastss(dst, as_Address(src), vector_len);
3512 } else {
3513 lea(rscratch, src);
3514 Assembler::vbroadcastss(dst, Address(rscratch, 0), vector_len);
3515 }
3516 }
3517
3518 // Vector float blend
3519 // vblendvps(XMMRegister dst, XMMRegister nds, XMMRegister src, XMMRegister mask, int vector_len, bool compute_mask = true, XMMRegister scratch = xnoreg)
3520 void MacroAssembler::vblendvps(XMMRegister dst, XMMRegister src1, XMMRegister src2, XMMRegister mask, int vector_len, bool compute_mask, XMMRegister scratch) {
3521 // WARN: Allow dst == (src1|src2), mask == scratch
3522 bool blend_emulation = EnableX86ECoreOpts && UseAVX > 1;
3523 bool scratch_available = scratch != xnoreg && scratch != src1 && scratch != src2 && scratch != dst;
3524 bool dst_available = dst != mask && (dst != src1 || dst != src2);
3525 if (blend_emulation && scratch_available && dst_available) {
3526 if (compute_mask) {
3527 vpsrad(scratch, mask, 32, vector_len);
3528 mask = scratch;
3529 }
3530 if (dst == src1) {
3531 vpandn(dst, mask, src1, vector_len); // if mask == 0, src1
3532 vpand (scratch, mask, src2, vector_len); // if mask == 1, src2
3533 } else {
3534 vpand (dst, mask, src2, vector_len); // if mask == 1, src2
3535 vpandn(scratch, mask, src1, vector_len); // if mask == 0, src1
3536 }
3537 vpor(dst, dst, scratch, vector_len);
3538 } else {
3539 Assembler::vblendvps(dst, src1, src2, mask, vector_len);
3540 }
3541 }
3542
3543 // vblendvpd(XMMRegister dst, XMMRegister nds, XMMRegister src, XMMRegister mask, int vector_len, bool compute_mask = true, XMMRegister scratch = xnoreg)
3544 void MacroAssembler::vblendvpd(XMMRegister dst, XMMRegister src1, XMMRegister src2, XMMRegister mask, int vector_len, bool compute_mask, XMMRegister scratch) {
3545 // WARN: Allow dst == (src1|src2), mask == scratch
3546 bool blend_emulation = EnableX86ECoreOpts && UseAVX > 1;
3547 bool scratch_available = scratch != xnoreg && scratch != src1 && scratch != src2 && scratch != dst && (!compute_mask || scratch != mask);
3548 bool dst_available = dst != mask && (dst != src1 || dst != src2);
3549 if (blend_emulation && scratch_available && dst_available) {
3550 if (compute_mask) {
3551 vpxor(scratch, scratch, scratch, vector_len);
3552 vpcmpgtq(scratch, scratch, mask, vector_len);
3553 mask = scratch;
3554 }
3555 if (dst == src1) {
3556 vpandn(dst, mask, src1, vector_len); // if mask == 0, src
3557 vpand (scratch, mask, src2, vector_len); // if mask == 1, src2
3558 } else {
3559 vpand (dst, mask, src2, vector_len); // if mask == 1, src2
3560 vpandn(scratch, mask, src1, vector_len); // if mask == 0, src
3561 }
3562 vpor(dst, dst, scratch, vector_len);
3563 } else {
3564 Assembler::vblendvpd(dst, src1, src2, mask, vector_len);
3565 }
3566 }
3567
3568 void MacroAssembler::vpcmpeqb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
3569 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3570 Assembler::vpcmpeqb(dst, nds, src, vector_len);
3571 }
3572
3573 void MacroAssembler::vpcmpeqb(XMMRegister dst, XMMRegister src1, Address src2, int vector_len) {
3574 assert(((dst->encoding() < 16 && src1->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3575 Assembler::vpcmpeqb(dst, src1, src2, vector_len);
3576 }
3577
3578 void MacroAssembler::vpcmpeqw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
3579 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3580 Assembler::vpcmpeqw(dst, nds, src, vector_len);
3581 }
3582
3583 void MacroAssembler::vpcmpeqw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
3584 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3585 Assembler::vpcmpeqw(dst, nds, src, vector_len);
3586 }
3587
3588 void MacroAssembler::evpcmpeqd(KRegister kdst, KRegister mask, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3589 assert(rscratch != noreg || always_reachable(src), "missing");
3590
3591 if (reachable(src)) {
3592 Assembler::evpcmpeqd(kdst, mask, nds, as_Address(src), vector_len);
3593 } else {
3594 lea(rscratch, src);
3595 Assembler::evpcmpeqd(kdst, mask, nds, Address(rscratch, 0), vector_len);
3596 }
3597 }
3598
3599 void MacroAssembler::evpcmpd(KRegister kdst, KRegister mask, XMMRegister nds, AddressLiteral src,
3600 int comparison, bool is_signed, int vector_len, Register rscratch) {
3601 assert(rscratch != noreg || always_reachable(src), "missing");
3602
3603 if (reachable(src)) {
3604 Assembler::evpcmpd(kdst, mask, nds, as_Address(src), comparison, is_signed, vector_len);
3605 } else {
3606 lea(rscratch, src);
3607 Assembler::evpcmpd(kdst, mask, nds, Address(rscratch, 0), comparison, is_signed, vector_len);
3608 }
3609 }
3610
3611 void MacroAssembler::evpcmpq(KRegister kdst, KRegister mask, XMMRegister nds, AddressLiteral src,
3612 int comparison, bool is_signed, int vector_len, Register rscratch) {
3613 assert(rscratch != noreg || always_reachable(src), "missing");
3614
3615 if (reachable(src)) {
3616 Assembler::evpcmpq(kdst, mask, nds, as_Address(src), comparison, is_signed, vector_len);
3617 } else {
3618 lea(rscratch, src);
3619 Assembler::evpcmpq(kdst, mask, nds, Address(rscratch, 0), comparison, is_signed, vector_len);
3620 }
3621 }
3622
3623 void MacroAssembler::evpcmpb(KRegister kdst, KRegister mask, XMMRegister nds, AddressLiteral src,
3624 int comparison, bool is_signed, int vector_len, Register rscratch) {
3625 assert(rscratch != noreg || always_reachable(src), "missing");
3626
3627 if (reachable(src)) {
3628 Assembler::evpcmpb(kdst, mask, nds, as_Address(src), comparison, is_signed, vector_len);
3629 } else {
3630 lea(rscratch, src);
3631 Assembler::evpcmpb(kdst, mask, nds, Address(rscratch, 0), comparison, is_signed, vector_len);
3632 }
3633 }
3634
3635 void MacroAssembler::evpcmpw(KRegister kdst, KRegister mask, XMMRegister nds, AddressLiteral src,
3636 int comparison, bool is_signed, int vector_len, Register rscratch) {
3637 assert(rscratch != noreg || always_reachable(src), "missing");
3638
3639 if (reachable(src)) {
3640 Assembler::evpcmpw(kdst, mask, nds, as_Address(src), comparison, is_signed, vector_len);
3641 } else {
3642 lea(rscratch, src);
3643 Assembler::evpcmpw(kdst, mask, nds, Address(rscratch, 0), comparison, is_signed, vector_len);
3644 }
3645 }
3646
3647 void MacroAssembler::vpcmpCC(XMMRegister dst, XMMRegister nds, XMMRegister src, int cond_encoding, Width width, int vector_len) {
3648 if (width == Assembler::Q) {
3649 Assembler::vpcmpCCq(dst, nds, src, cond_encoding, vector_len);
3650 } else {
3651 Assembler::vpcmpCCbwd(dst, nds, src, cond_encoding, vector_len);
3652 }
3653 }
3654
3655 void MacroAssembler::vpcmpCCW(XMMRegister dst, XMMRegister nds, XMMRegister src, XMMRegister xtmp, ComparisonPredicate cond, Width width, int vector_len) {
3656 int eq_cond_enc = 0x29;
3657 int gt_cond_enc = 0x37;
3658 if (width != Assembler::Q) {
3659 eq_cond_enc = 0x74 + width;
3660 gt_cond_enc = 0x64 + width;
3661 }
3662 switch (cond) {
3663 case eq:
3664 vpcmpCC(dst, nds, src, eq_cond_enc, width, vector_len);
3665 break;
3666 case neq:
3667 vpcmpCC(dst, nds, src, eq_cond_enc, width, vector_len);
3668 vallones(xtmp, vector_len);
3669 vpxor(dst, xtmp, dst, vector_len);
3670 break;
3671 case le:
3672 vpcmpCC(dst, nds, src, gt_cond_enc, width, vector_len);
3673 vallones(xtmp, vector_len);
3674 vpxor(dst, xtmp, dst, vector_len);
3675 break;
3676 case nlt:
3677 vpcmpCC(dst, src, nds, gt_cond_enc, width, vector_len);
3678 vallones(xtmp, vector_len);
3679 vpxor(dst, xtmp, dst, vector_len);
3680 break;
3681 case lt:
3682 vpcmpCC(dst, src, nds, gt_cond_enc, width, vector_len);
3683 break;
3684 case nle:
3685 vpcmpCC(dst, nds, src, gt_cond_enc, width, vector_len);
3686 break;
3687 default:
3688 assert(false, "Should not reach here");
3689 }
3690 }
3691
3692 void MacroAssembler::vpmovzxbw(XMMRegister dst, Address src, int vector_len) {
3693 assert(((dst->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3694 Assembler::vpmovzxbw(dst, src, vector_len);
3695 }
3696
3697 void MacroAssembler::vpmovmskb(Register dst, XMMRegister src, int vector_len) {
3698 assert((src->encoding() < 16),"XMM register should be 0-15");
3699 Assembler::vpmovmskb(dst, src, vector_len);
3700 }
3701
3702 void MacroAssembler::vpmullw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
3703 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3704 Assembler::vpmullw(dst, nds, src, vector_len);
3705 }
3706
3707 void MacroAssembler::vpmullw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
3708 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3709 Assembler::vpmullw(dst, nds, src, vector_len);
3710 }
3711
3712 void MacroAssembler::vpmulld(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3713 assert((UseAVX > 0), "AVX support is needed");
3714 assert(rscratch != noreg || always_reachable(src), "missing");
3715
3716 if (reachable(src)) {
3717 Assembler::vpmulld(dst, nds, as_Address(src), vector_len);
3718 } else {
3719 lea(rscratch, src);
3720 Assembler::vpmulld(dst, nds, Address(rscratch, 0), vector_len);
3721 }
3722 }
3723
3724 void MacroAssembler::vpsubb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
3725 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3726 Assembler::vpsubb(dst, nds, src, vector_len);
3727 }
3728
3729 void MacroAssembler::vpsubb(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
3730 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3731 Assembler::vpsubb(dst, nds, src, vector_len);
3732 }
3733
3734 void MacroAssembler::vpsubw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
3735 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3736 Assembler::vpsubw(dst, nds, src, vector_len);
3737 }
3738
3739 void MacroAssembler::vpsubw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
3740 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3741 Assembler::vpsubw(dst, nds, src, vector_len);
3742 }
3743
3744 void MacroAssembler::vpsraw(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) {
3745 assert(((dst->encoding() < 16 && shift->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3746 Assembler::vpsraw(dst, nds, shift, vector_len);
3747 }
3748
3749 void MacroAssembler::vpsraw(XMMRegister dst, XMMRegister nds, int shift, int vector_len) {
3750 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3751 Assembler::vpsraw(dst, nds, shift, vector_len);
3752 }
3753
3754 void MacroAssembler::evpsraq(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) {
3755 assert(UseAVX > 2,"");
3756 if (!VM_Version::supports_avx512vl() && vector_len < 2) {
3757 vector_len = 2;
3758 }
3759 Assembler::evpsraq(dst, nds, shift, vector_len);
3760 }
3761
3762 void MacroAssembler::evpsraq(XMMRegister dst, XMMRegister nds, int shift, int vector_len) {
3763 assert(UseAVX > 2,"");
3764 if (!VM_Version::supports_avx512vl() && vector_len < 2) {
3765 vector_len = 2;
3766 }
3767 Assembler::evpsraq(dst, nds, shift, vector_len);
3768 }
3769
3770 void MacroAssembler::vpsrlw(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) {
3771 assert(((dst->encoding() < 16 && shift->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3772 Assembler::vpsrlw(dst, nds, shift, vector_len);
3773 }
3774
3775 void MacroAssembler::vpsrlw(XMMRegister dst, XMMRegister nds, int shift, int vector_len) {
3776 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3777 Assembler::vpsrlw(dst, nds, shift, vector_len);
3778 }
3779
3780 void MacroAssembler::vpsllw(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) {
3781 assert(((dst->encoding() < 16 && shift->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3782 Assembler::vpsllw(dst, nds, shift, vector_len);
3783 }
3784
3785 void MacroAssembler::vpsllw(XMMRegister dst, XMMRegister nds, int shift, int vector_len) {
3786 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3787 Assembler::vpsllw(dst, nds, shift, vector_len);
3788 }
3789
3790 void MacroAssembler::vptest(XMMRegister dst, XMMRegister src) {
3791 assert((dst->encoding() < 16 && src->encoding() < 16),"XMM register should be 0-15");
3792 Assembler::vptest(dst, src);
3793 }
3794
3795 void MacroAssembler::punpcklbw(XMMRegister dst, XMMRegister src) {
3796 assert(((dst->encoding() < 16 && src->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3797 Assembler::punpcklbw(dst, src);
3798 }
3799
3800 void MacroAssembler::pshufd(XMMRegister dst, Address src, int mode) {
3801 assert(((dst->encoding() < 16) || VM_Version::supports_avx512vl()),"XMM register should be 0-15");
3802 Assembler::pshufd(dst, src, mode);
3803 }
3804
3805 void MacroAssembler::pshuflw(XMMRegister dst, XMMRegister src, int mode) {
3806 assert(((dst->encoding() < 16 && src->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3807 Assembler::pshuflw(dst, src, mode);
3808 }
3809
3810 void MacroAssembler::vandpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3811 assert(rscratch != noreg || always_reachable(src), "missing");
3812
3813 if (reachable(src)) {
3814 vandpd(dst, nds, as_Address(src), vector_len);
3815 } else {
3816 lea(rscratch, src);
3817 vandpd(dst, nds, Address(rscratch, 0), vector_len);
3818 }
3819 }
3820
3821 void MacroAssembler::vandps(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3822 assert(rscratch != noreg || always_reachable(src), "missing");
3823
3824 if (reachable(src)) {
3825 vandps(dst, nds, as_Address(src), vector_len);
3826 } else {
3827 lea(rscratch, src);
3828 vandps(dst, nds, Address(rscratch, 0), vector_len);
3829 }
3830 }
3831
3832 void MacroAssembler::evpord(XMMRegister dst, KRegister mask, XMMRegister nds, AddressLiteral src,
3833 bool merge, int vector_len, Register rscratch) {
3834 assert(rscratch != noreg || always_reachable(src), "missing");
3835
3836 if (reachable(src)) {
3837 Assembler::evpord(dst, mask, nds, as_Address(src), merge, vector_len);
3838 } else {
3839 lea(rscratch, src);
3840 Assembler::evpord(dst, mask, nds, Address(rscratch, 0), merge, vector_len);
3841 }
3842 }
3843
3844 void MacroAssembler::vdivsd(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3845 assert(rscratch != noreg || always_reachable(src), "missing");
3846
3847 if (reachable(src)) {
3848 vdivsd(dst, nds, as_Address(src));
3849 } else {
3850 lea(rscratch, src);
3851 vdivsd(dst, nds, Address(rscratch, 0));
3852 }
3853 }
3854
3855 void MacroAssembler::vdivss(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3856 assert(rscratch != noreg || always_reachable(src), "missing");
3857
3858 if (reachable(src)) {
3859 vdivss(dst, nds, as_Address(src));
3860 } else {
3861 lea(rscratch, src);
3862 vdivss(dst, nds, Address(rscratch, 0));
3863 }
3864 }
3865
3866 void MacroAssembler::vmulsd(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3867 assert(rscratch != noreg || always_reachable(src), "missing");
3868
3869 if (reachable(src)) {
3870 vmulsd(dst, nds, as_Address(src));
3871 } else {
3872 lea(rscratch, src);
3873 vmulsd(dst, nds, Address(rscratch, 0));
3874 }
3875 }
3876
3877 void MacroAssembler::vmulss(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3878 assert(rscratch != noreg || always_reachable(src), "missing");
3879
3880 if (reachable(src)) {
3881 vmulss(dst, nds, as_Address(src));
3882 } else {
3883 lea(rscratch, src);
3884 vmulss(dst, nds, Address(rscratch, 0));
3885 }
3886 }
3887
3888 void MacroAssembler::vsubsd(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3889 assert(rscratch != noreg || always_reachable(src), "missing");
3890
3891 if (reachable(src)) {
3892 vsubsd(dst, nds, as_Address(src));
3893 } else {
3894 lea(rscratch, src);
3895 vsubsd(dst, nds, Address(rscratch, 0));
3896 }
3897 }
3898
3899 void MacroAssembler::vsubss(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3900 assert(rscratch != noreg || always_reachable(src), "missing");
3901
3902 if (reachable(src)) {
3903 vsubss(dst, nds, as_Address(src));
3904 } else {
3905 lea(rscratch, src);
3906 vsubss(dst, nds, Address(rscratch, 0));
3907 }
3908 }
3909
3910 void MacroAssembler::vnegatess(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3911 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vldq()),"XMM register should be 0-15");
3912 assert(rscratch != noreg || always_reachable(src), "missing");
3913
3914 vxorps(dst, nds, src, Assembler::AVX_128bit, rscratch);
3915 }
3916
3917 void MacroAssembler::vnegatesd(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3918 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vldq()),"XMM register should be 0-15");
3919 assert(rscratch != noreg || always_reachable(src), "missing");
3920
3921 vxorpd(dst, nds, src, Assembler::AVX_128bit, rscratch);
3922 }
3923
3924 void MacroAssembler::vxorpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3925 assert(rscratch != noreg || always_reachable(src), "missing");
3926
3927 if (reachable(src)) {
3928 vxorpd(dst, nds, as_Address(src), vector_len);
3929 } else {
3930 lea(rscratch, src);
3931 vxorpd(dst, nds, Address(rscratch, 0), vector_len);
3932 }
3933 }
3934
3935 void MacroAssembler::vxorps(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3936 assert(rscratch != noreg || always_reachable(src), "missing");
3937
3938 if (reachable(src)) {
3939 vxorps(dst, nds, as_Address(src), vector_len);
3940 } else {
3941 lea(rscratch, src);
3942 vxorps(dst, nds, Address(rscratch, 0), vector_len);
3943 }
3944 }
3945
3946 void MacroAssembler::vpxor(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3947 assert(rscratch != noreg || always_reachable(src), "missing");
3948
3949 if (UseAVX > 1 || (vector_len < 1)) {
3950 if (reachable(src)) {
3951 Assembler::vpxor(dst, nds, as_Address(src), vector_len);
3952 } else {
3953 lea(rscratch, src);
3954 Assembler::vpxor(dst, nds, Address(rscratch, 0), vector_len);
3955 }
3956 } else {
3957 MacroAssembler::vxorpd(dst, nds, src, vector_len, rscratch);
3958 }
3959 }
3960
3961 void MacroAssembler::vpermd(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3962 assert(rscratch != noreg || always_reachable(src), "missing");
3963
3964 if (reachable(src)) {
3965 Assembler::vpermd(dst, nds, as_Address(src), vector_len);
3966 } else {
3967 lea(rscratch, src);
3968 Assembler::vpermd(dst, nds, Address(rscratch, 0), vector_len);
3969 }
3970 }
3971
3972 void MacroAssembler::clear_jobject_tag(Register possibly_non_local) {
3973 const int32_t inverted_mask = ~static_cast<int32_t>(JNIHandles::tag_mask);
3974 STATIC_ASSERT(inverted_mask == -4); // otherwise check this code
3975 // The inverted mask is sign-extended
3976 andptr(possibly_non_local, inverted_mask);
3977 }
3978
3979 void MacroAssembler::resolve_jobject(Register value,
3980 Register thread,
3981 Register tmp) {
3982 assert_different_registers(value, thread, tmp);
3983 Label done, tagged, weak_tagged;
3984 testptr(value, value);
3985 jcc(Assembler::zero, done); // Use null as-is.
3986 testptr(value, JNIHandles::tag_mask); // Test for tag.
3987 jcc(Assembler::notZero, tagged);
3988
3989 // Resolve local handle
3990 access_load_at(T_OBJECT, IN_NATIVE | AS_RAW, value, Address(value, 0), tmp, thread);
3991 verify_oop(value);
3992 jmp(done);
3993
3994 bind(tagged);
3995 testptr(value, JNIHandles::TypeTag::weak_global); // Test for weak tag.
3996 jcc(Assembler::notZero, weak_tagged);
3997
3998 // Resolve global handle
3999 access_load_at(T_OBJECT, IN_NATIVE, value, Address(value, -JNIHandles::TypeTag::global), tmp, thread);
4000 verify_oop(value);
4001 jmp(done);
4002
4003 bind(weak_tagged);
4004 // Resolve jweak.
4005 access_load_at(T_OBJECT, IN_NATIVE | ON_PHANTOM_OOP_REF,
4006 value, Address(value, -JNIHandles::TypeTag::weak_global), tmp, thread);
4007 verify_oop(value);
4008
4009 bind(done);
4010 }
4011
4012 void MacroAssembler::resolve_global_jobject(Register value,
4013 Register thread,
4014 Register tmp) {
4015 assert_different_registers(value, thread, tmp);
4016 Label done;
4017
4018 testptr(value, value);
4019 jcc(Assembler::zero, done); // Use null as-is.
4020
4021 #ifdef ASSERT
4022 {
4023 Label valid_global_tag;
4024 testptr(value, JNIHandles::TypeTag::global); // Test for global tag.
4025 jcc(Assembler::notZero, valid_global_tag);
4026 stop("non global jobject using resolve_global_jobject");
4027 bind(valid_global_tag);
4028 }
4029 #endif
4030
4031 // Resolve global handle
4032 access_load_at(T_OBJECT, IN_NATIVE, value, Address(value, -JNIHandles::TypeTag::global), tmp, thread);
4033 verify_oop(value);
4034
4035 bind(done);
4036 }
4037
4038 void MacroAssembler::subptr(Register dst, int32_t imm32) {
4039 LP64_ONLY(subq(dst, imm32)) NOT_LP64(subl(dst, imm32));
4040 }
4041
4042 // Force generation of a 4 byte immediate value even if it fits into 8bit
4043 void MacroAssembler::subptr_imm32(Register dst, int32_t imm32) {
4044 LP64_ONLY(subq_imm32(dst, imm32)) NOT_LP64(subl_imm32(dst, imm32));
4045 }
4046
4047 void MacroAssembler::subptr(Register dst, Register src) {
4048 LP64_ONLY(subq(dst, src)) NOT_LP64(subl(dst, src));
4049 }
4050
4051 // C++ bool manipulation
4052 void MacroAssembler::testbool(Register dst) {
4053 if(sizeof(bool) == 1)
4054 testb(dst, 0xff);
4055 else if(sizeof(bool) == 2) {
4056 // testw implementation needed for two byte bools
4057 ShouldNotReachHere();
4058 } else if(sizeof(bool) == 4)
4059 testl(dst, dst);
4060 else
4061 // unsupported
4062 ShouldNotReachHere();
4063 }
4064
4065 void MacroAssembler::testptr(Register dst, Register src) {
4066 LP64_ONLY(testq(dst, src)) NOT_LP64(testl(dst, src));
4067 }
4068
4069 // Defines obj, preserves var_size_in_bytes, okay for t2 == var_size_in_bytes.
4070 void MacroAssembler::tlab_allocate(Register thread, Register obj,
4071 Register var_size_in_bytes,
4072 int con_size_in_bytes,
4073 Register t1,
4074 Register t2,
4075 Label& slow_case) {
4076 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
4077 bs->tlab_allocate(this, thread, obj, var_size_in_bytes, con_size_in_bytes, t1, t2, slow_case);
4078 }
4079
4080 RegSet MacroAssembler::call_clobbered_gp_registers() {
4081 RegSet regs;
4082 #ifdef _LP64
4083 regs += RegSet::of(rax, rcx, rdx);
4084 #ifndef WINDOWS
4085 regs += RegSet::of(rsi, rdi);
4086 #endif
4087 regs += RegSet::range(r8, r11);
4088 #else
4089 regs += RegSet::of(rax, rcx, rdx);
4090 #endif
4091 return regs;
4092 }
4093
4094 XMMRegSet MacroAssembler::call_clobbered_xmm_registers() {
4095 int num_xmm_registers = XMMRegister::available_xmm_registers();
4096 #if defined(WINDOWS) && defined(_LP64)
4097 XMMRegSet result = XMMRegSet::range(xmm0, xmm5);
4098 if (num_xmm_registers > 16) {
4099 result += XMMRegSet::range(xmm16, as_XMMRegister(num_xmm_registers - 1));
4100 }
4101 return result;
4102 #else
4103 return XMMRegSet::range(xmm0, as_XMMRegister(num_xmm_registers - 1));
4104 #endif
4105 }
4106
4107 static int FPUSaveAreaSize = align_up(108, StackAlignmentInBytes); // 108 bytes needed for FPU state by fsave/frstor
4108
4109 #ifndef _LP64
4110 static bool use_x87_registers() { return UseSSE < 2; }
4111 #endif
4112 static bool use_xmm_registers() { return UseSSE >= 1; }
4113
4114 // C1 only ever uses the first double/float of the XMM register.
4115 static int xmm_save_size() { return UseSSE >= 2 ? sizeof(double) : sizeof(float); }
4116
4117 static void save_xmm_register(MacroAssembler* masm, int offset, XMMRegister reg) {
4118 if (UseSSE == 1) {
4119 masm->movflt(Address(rsp, offset), reg);
4120 } else {
4121 masm->movdbl(Address(rsp, offset), reg);
4122 }
4123 }
4124
4125 static void restore_xmm_register(MacroAssembler* masm, int offset, XMMRegister reg) {
4126 if (UseSSE == 1) {
4127 masm->movflt(reg, Address(rsp, offset));
4128 } else {
4129 masm->movdbl(reg, Address(rsp, offset));
4130 }
4131 }
4132
4133 static int register_section_sizes(RegSet gp_registers, XMMRegSet xmm_registers,
4134 bool save_fpu, int& gp_area_size,
4135 int& fp_area_size, int& xmm_area_size) {
4136
4137 gp_area_size = align_up(gp_registers.size() * Register::max_slots_per_register * VMRegImpl::stack_slot_size,
4138 StackAlignmentInBytes);
4139 #ifdef _LP64
4140 fp_area_size = 0;
4141 #else
4142 fp_area_size = (save_fpu && use_x87_registers()) ? FPUSaveAreaSize : 0;
4143 #endif
4144 xmm_area_size = (save_fpu && use_xmm_registers()) ? xmm_registers.size() * xmm_save_size() : 0;
4145
4146 return gp_area_size + fp_area_size + xmm_area_size;
4147 }
4148
4149 void MacroAssembler::push_call_clobbered_registers_except(RegSet exclude, bool save_fpu) {
4150 block_comment("push_call_clobbered_registers start");
4151 // Regular registers
4152 RegSet gp_registers_to_push = call_clobbered_gp_registers() - exclude;
4153
4154 int gp_area_size;
4155 int fp_area_size;
4156 int xmm_area_size;
4157 int total_save_size = register_section_sizes(gp_registers_to_push, call_clobbered_xmm_registers(), save_fpu,
4158 gp_area_size, fp_area_size, xmm_area_size);
4159 subptr(rsp, total_save_size);
4160
4161 push_set(gp_registers_to_push, 0);
4162
4163 #ifndef _LP64
4164 if (save_fpu && use_x87_registers()) {
4165 fnsave(Address(rsp, gp_area_size));
4166 fwait();
4167 }
4168 #endif
4169 if (save_fpu && use_xmm_registers()) {
4170 push_set(call_clobbered_xmm_registers(), gp_area_size + fp_area_size);
4171 }
4172
4173 block_comment("push_call_clobbered_registers end");
4174 }
4175
4176 void MacroAssembler::pop_call_clobbered_registers_except(RegSet exclude, bool restore_fpu) {
4177 block_comment("pop_call_clobbered_registers start");
4178
4179 RegSet gp_registers_to_pop = call_clobbered_gp_registers() - exclude;
4180
4181 int gp_area_size;
4182 int fp_area_size;
4183 int xmm_area_size;
4184 int total_save_size = register_section_sizes(gp_registers_to_pop, call_clobbered_xmm_registers(), restore_fpu,
4185 gp_area_size, fp_area_size, xmm_area_size);
4186
4187 if (restore_fpu && use_xmm_registers()) {
4188 pop_set(call_clobbered_xmm_registers(), gp_area_size + fp_area_size);
4189 }
4190 #ifndef _LP64
4191 if (restore_fpu && use_x87_registers()) {
4192 frstor(Address(rsp, gp_area_size));
4193 }
4194 #endif
4195
4196 pop_set(gp_registers_to_pop, 0);
4197
4198 addptr(rsp, total_save_size);
4199
4200 vzeroupper();
4201
4202 block_comment("pop_call_clobbered_registers end");
4203 }
4204
4205 void MacroAssembler::push_set(XMMRegSet set, int offset) {
4206 assert(is_aligned(set.size() * xmm_save_size(), StackAlignmentInBytes), "must be");
4207 int spill_offset = offset;
4208
4209 for (RegSetIterator<XMMRegister> it = set.begin(); *it != xnoreg; ++it) {
4210 save_xmm_register(this, spill_offset, *it);
4211 spill_offset += xmm_save_size();
4212 }
4213 }
4214
4215 void MacroAssembler::pop_set(XMMRegSet set, int offset) {
4216 int restore_size = set.size() * xmm_save_size();
4217 assert(is_aligned(restore_size, StackAlignmentInBytes), "must be");
4218
4219 int restore_offset = offset + restore_size - xmm_save_size();
4220
4221 for (ReverseRegSetIterator<XMMRegister> it = set.rbegin(); *it != xnoreg; ++it) {
4222 restore_xmm_register(this, restore_offset, *it);
4223 restore_offset -= xmm_save_size();
4224 }
4225 }
4226
4227 void MacroAssembler::push_set(RegSet set, int offset) {
4228 int spill_offset;
4229 if (offset == -1) {
4230 int register_push_size = set.size() * Register::max_slots_per_register * VMRegImpl::stack_slot_size;
4231 int aligned_size = align_up(register_push_size, StackAlignmentInBytes);
4232 subptr(rsp, aligned_size);
4233 spill_offset = 0;
4234 } else {
4235 spill_offset = offset;
4236 }
4237
4238 for (RegSetIterator<Register> it = set.begin(); *it != noreg; ++it) {
4239 movptr(Address(rsp, spill_offset), *it);
4240 spill_offset += Register::max_slots_per_register * VMRegImpl::stack_slot_size;
4241 }
4242 }
4243
4244 void MacroAssembler::pop_set(RegSet set, int offset) {
4245
4246 int gp_reg_size = Register::max_slots_per_register * VMRegImpl::stack_slot_size;
4247 int restore_size = set.size() * gp_reg_size;
4248 int aligned_size = align_up(restore_size, StackAlignmentInBytes);
4249
4250 int restore_offset;
4251 if (offset == -1) {
4252 restore_offset = restore_size - gp_reg_size;
4253 } else {
4254 restore_offset = offset + restore_size - gp_reg_size;
4255 }
4256 for (ReverseRegSetIterator<Register> it = set.rbegin(); *it != noreg; ++it) {
4257 movptr(*it, Address(rsp, restore_offset));
4258 restore_offset -= gp_reg_size;
4259 }
4260
4261 if (offset == -1) {
4262 addptr(rsp, aligned_size);
4263 }
4264 }
4265
4266 // Preserves the contents of address, destroys the contents length_in_bytes and temp.
4267 void MacroAssembler::zero_memory(Register address, Register length_in_bytes, int offset_in_bytes, Register temp) {
4268 assert(address != length_in_bytes && address != temp && temp != length_in_bytes, "registers must be different");
4269 assert((offset_in_bytes & (BytesPerWord - 1)) == 0, "offset must be a multiple of BytesPerWord");
4270 Label done;
4271
4272 testptr(length_in_bytes, length_in_bytes);
4273 jcc(Assembler::zero, done);
4274
4275 // initialize topmost word, divide index by 2, check if odd and test if zero
4276 // note: for the remaining code to work, index must be a multiple of BytesPerWord
4277 #ifdef ASSERT
4278 {
4279 Label L;
4280 testptr(length_in_bytes, BytesPerWord - 1);
4281 jcc(Assembler::zero, L);
4282 stop("length must be a multiple of BytesPerWord");
4283 bind(L);
4284 }
4285 #endif
4286 Register index = length_in_bytes;
4287 xorptr(temp, temp); // use _zero reg to clear memory (shorter code)
4288 if (UseIncDec) {
4289 shrptr(index, 3); // divide by 8/16 and set carry flag if bit 2 was set
4290 } else {
4291 shrptr(index, 2); // use 2 instructions to avoid partial flag stall
4292 shrptr(index, 1);
4293 }
4294 #ifndef _LP64
4295 // index could have not been a multiple of 8 (i.e., bit 2 was set)
4296 {
4297 Label even;
4298 // note: if index was a multiple of 8, then it cannot
4299 // be 0 now otherwise it must have been 0 before
4300 // => if it is even, we don't need to check for 0 again
4301 jcc(Assembler::carryClear, even);
4302 // clear topmost word (no jump would be needed if conditional assignment worked here)
4303 movptr(Address(address, index, Address::times_8, offset_in_bytes - 0*BytesPerWord), temp);
4304 // index could be 0 now, must check again
4305 jcc(Assembler::zero, done);
4306 bind(even);
4307 }
4308 #endif // !_LP64
4309 // initialize remaining object fields: index is a multiple of 2 now
4310 {
4311 Label loop;
4312 bind(loop);
4313 movptr(Address(address, index, Address::times_8, offset_in_bytes - 1*BytesPerWord), temp);
4314 NOT_LP64(movptr(Address(address, index, Address::times_8, offset_in_bytes - 2*BytesPerWord), temp);)
4315 decrement(index);
4316 jcc(Assembler::notZero, loop);
4317 }
4318
4319 bind(done);
4320 }
4321
4322 // Look up the method for a megamorphic invokeinterface call.
4323 // The target method is determined by <intf_klass, itable_index>.
4324 // The receiver klass is in recv_klass.
4325 // On success, the result will be in method_result, and execution falls through.
4326 // On failure, execution transfers to the given label.
4327 void MacroAssembler::lookup_interface_method(Register recv_klass,
4328 Register intf_klass,
4329 RegisterOrConstant itable_index,
4330 Register method_result,
4331 Register scan_temp,
4332 Label& L_no_such_interface,
4333 bool return_method) {
4334 assert_different_registers(recv_klass, intf_klass, scan_temp);
4335 assert_different_registers(method_result, intf_klass, scan_temp);
4336 assert(recv_klass != method_result || !return_method,
4337 "recv_klass can be destroyed when method isn't needed");
4338
4339 assert(itable_index.is_constant() || itable_index.as_register() == method_result,
4340 "caller must use same register for non-constant itable index as for method");
4341
4342 // Compute start of first itableOffsetEntry (which is at the end of the vtable)
4343 int vtable_base = in_bytes(Klass::vtable_start_offset());
4344 int itentry_off = in_bytes(itableMethodEntry::method_offset());
4345 int scan_step = itableOffsetEntry::size() * wordSize;
4346 int vte_size = vtableEntry::size_in_bytes();
4347 Address::ScaleFactor times_vte_scale = Address::times_ptr;
4348 assert(vte_size == wordSize, "else adjust times_vte_scale");
4349
4350 movl(scan_temp, Address(recv_klass, Klass::vtable_length_offset()));
4351
4352 // Could store the aligned, prescaled offset in the klass.
4353 lea(scan_temp, Address(recv_klass, scan_temp, times_vte_scale, vtable_base));
4354
4355 if (return_method) {
4356 // Adjust recv_klass by scaled itable_index, so we can free itable_index.
4357 assert(itableMethodEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
4358 lea(recv_klass, Address(recv_klass, itable_index, Address::times_ptr, itentry_off));
4359 }
4360
4361 // for (scan = klass->itable(); scan->interface() != nullptr; scan += scan_step) {
4362 // if (scan->interface() == intf) {
4363 // result = (klass + scan->offset() + itable_index);
4364 // }
4365 // }
4366 Label search, found_method;
4367
4368 for (int peel = 1; peel >= 0; peel--) {
4369 movptr(method_result, Address(scan_temp, itableOffsetEntry::interface_offset()));
4370 cmpptr(intf_klass, method_result);
4371
4372 if (peel) {
4373 jccb(Assembler::equal, found_method);
4374 } else {
4375 jccb(Assembler::notEqual, search);
4376 // (invert the test to fall through to found_method...)
4377 }
4378
4379 if (!peel) break;
4380
4381 bind(search);
4382
4383 // Check that the previous entry is non-null. A null entry means that
4384 // the receiver class doesn't implement the interface, and wasn't the
4385 // same as when the caller was compiled.
4386 testptr(method_result, method_result);
4387 jcc(Assembler::zero, L_no_such_interface);
4388 addptr(scan_temp, scan_step);
4389 }
4390
4391 bind(found_method);
4392
4393 if (return_method) {
4394 // Got a hit.
4395 movl(scan_temp, Address(scan_temp, itableOffsetEntry::offset_offset()));
4396 movptr(method_result, Address(recv_klass, scan_temp, Address::times_1));
4397 }
4398 }
4399
4400 // Look up the method for a megamorphic invokeinterface call in a single pass over itable:
4401 // - check recv_klass (actual object class) is a subtype of resolved_klass from CompiledICData
4402 // - find a holder_klass (class that implements the method) vtable offset and get the method from vtable by index
4403 // The target method is determined by <holder_klass, itable_index>.
4404 // The receiver klass is in recv_klass.
4405 // On success, the result will be in method_result, and execution falls through.
4406 // On failure, execution transfers to the given label.
4407 void MacroAssembler::lookup_interface_method_stub(Register recv_klass,
4408 Register holder_klass,
4409 Register resolved_klass,
4410 Register method_result,
4411 Register scan_temp,
4412 Register temp_reg2,
4413 Register receiver,
4414 int itable_index,
4415 Label& L_no_such_interface) {
4416 assert_different_registers(recv_klass, method_result, holder_klass, resolved_klass, scan_temp, temp_reg2, receiver);
4417 Register temp_itbl_klass = method_result;
4418 Register temp_reg = (temp_reg2 == noreg ? recv_klass : temp_reg2); // reuse recv_klass register on 32-bit x86 impl
4419
4420 int vtable_base = in_bytes(Klass::vtable_start_offset());
4421 int itentry_off = in_bytes(itableMethodEntry::method_offset());
4422 int scan_step = itableOffsetEntry::size() * wordSize;
4423 int vte_size = vtableEntry::size_in_bytes();
4424 int ioffset = in_bytes(itableOffsetEntry::interface_offset());
4425 int ooffset = in_bytes(itableOffsetEntry::offset_offset());
4426 Address::ScaleFactor times_vte_scale = Address::times_ptr;
4427 assert(vte_size == wordSize, "adjust times_vte_scale");
4428
4429 Label L_loop_scan_resolved_entry, L_resolved_found, L_holder_found;
4430
4431 // temp_itbl_klass = recv_klass.itable[0]
4432 // scan_temp = &recv_klass.itable[0] + step
4433 movl(scan_temp, Address(recv_klass, Klass::vtable_length_offset()));
4434 movptr(temp_itbl_klass, Address(recv_klass, scan_temp, times_vte_scale, vtable_base + ioffset));
4435 lea(scan_temp, Address(recv_klass, scan_temp, times_vte_scale, vtable_base + ioffset + scan_step));
4436 xorptr(temp_reg, temp_reg);
4437
4438 // Initial checks:
4439 // - if (holder_klass != resolved_klass), go to "scan for resolved"
4440 // - if (itable[0] == 0), no such interface
4441 // - if (itable[0] == holder_klass), shortcut to "holder found"
4442 cmpptr(holder_klass, resolved_klass);
4443 jccb(Assembler::notEqual, L_loop_scan_resolved_entry);
4444 testptr(temp_itbl_klass, temp_itbl_klass);
4445 jccb(Assembler::zero, L_no_such_interface);
4446 cmpptr(holder_klass, temp_itbl_klass);
4447 jccb(Assembler::equal, L_holder_found);
4448
4449 // Loop: Look for holder_klass record in itable
4450 // do {
4451 // tmp = itable[index];
4452 // index += step;
4453 // if (tmp == holder_klass) {
4454 // goto L_holder_found; // Found!
4455 // }
4456 // } while (tmp != 0);
4457 // goto L_no_such_interface // Not found.
4458 Label L_scan_holder;
4459 bind(L_scan_holder);
4460 movptr(temp_itbl_klass, Address(scan_temp, 0));
4461 addptr(scan_temp, scan_step);
4462 cmpptr(holder_klass, temp_itbl_klass);
4463 jccb(Assembler::equal, L_holder_found);
4464 testptr(temp_itbl_klass, temp_itbl_klass);
4465 jccb(Assembler::notZero, L_scan_holder);
4466
4467 jmpb(L_no_such_interface);
4468
4469 // Loop: Look for resolved_class record in itable
4470 // do {
4471 // tmp = itable[index];
4472 // index += step;
4473 // if (tmp == holder_klass) {
4474 // // Also check if we have met a holder klass
4475 // holder_tmp = itable[index-step-ioffset];
4476 // }
4477 // if (tmp == resolved_klass) {
4478 // goto L_resolved_found; // Found!
4479 // }
4480 // } while (tmp != 0);
4481 // goto L_no_such_interface // Not found.
4482 //
4483 Label L_loop_scan_resolved;
4484 bind(L_loop_scan_resolved);
4485 movptr(temp_itbl_klass, Address(scan_temp, 0));
4486 addptr(scan_temp, scan_step);
4487 bind(L_loop_scan_resolved_entry);
4488 cmpptr(holder_klass, temp_itbl_klass);
4489 cmovl(Assembler::equal, temp_reg, Address(scan_temp, ooffset - ioffset - scan_step));
4490 cmpptr(resolved_klass, temp_itbl_klass);
4491 jccb(Assembler::equal, L_resolved_found);
4492 testptr(temp_itbl_klass, temp_itbl_klass);
4493 jccb(Assembler::notZero, L_loop_scan_resolved);
4494
4495 jmpb(L_no_such_interface);
4496
4497 Label L_ready;
4498
4499 // See if we already have a holder klass. If not, go and scan for it.
4500 bind(L_resolved_found);
4501 testptr(temp_reg, temp_reg);
4502 jccb(Assembler::zero, L_scan_holder);
4503 jmpb(L_ready);
4504
4505 bind(L_holder_found);
4506 movl(temp_reg, Address(scan_temp, ooffset - ioffset - scan_step));
4507
4508 // Finally, temp_reg contains holder_klass vtable offset
4509 bind(L_ready);
4510 assert(itableMethodEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
4511 if (temp_reg2 == noreg) { // recv_klass register is clobbered for 32-bit x86 impl
4512 load_klass(scan_temp, receiver, noreg);
4513 movptr(method_result, Address(scan_temp, temp_reg, Address::times_1, itable_index * wordSize + itentry_off));
4514 } else {
4515 movptr(method_result, Address(recv_klass, temp_reg, Address::times_1, itable_index * wordSize + itentry_off));
4516 }
4517 }
4518
4519
4520 // virtual method calling
4521 void MacroAssembler::lookup_virtual_method(Register recv_klass,
4522 RegisterOrConstant vtable_index,
4523 Register method_result) {
4524 const ByteSize base = Klass::vtable_start_offset();
4525 assert(vtableEntry::size() * wordSize == wordSize, "else adjust the scaling in the code below");
4526 Address vtable_entry_addr(recv_klass,
4527 vtable_index, Address::times_ptr,
4528 base + vtableEntry::method_offset());
4529 movptr(method_result, vtable_entry_addr);
4530 }
4531
4532
4533 void MacroAssembler::check_klass_subtype(Register sub_klass,
4534 Register super_klass,
4535 Register temp_reg,
4536 Label& L_success) {
4537 Label L_failure;
4538 check_klass_subtype_fast_path(sub_klass, super_klass, temp_reg, &L_success, &L_failure, nullptr);
4539 check_klass_subtype_slow_path(sub_klass, super_klass, temp_reg, noreg, &L_success, nullptr);
4540 bind(L_failure);
4541 }
4542
4543
4544 void MacroAssembler::check_klass_subtype_fast_path(Register sub_klass,
4545 Register super_klass,
4546 Register temp_reg,
4547 Label* L_success,
4548 Label* L_failure,
4549 Label* L_slow_path,
4550 RegisterOrConstant super_check_offset) {
4551 assert_different_registers(sub_klass, super_klass, temp_reg);
4552 bool must_load_sco = (super_check_offset.constant_or_zero() == -1);
4553 if (super_check_offset.is_register()) {
4554 assert_different_registers(sub_klass, super_klass,
4555 super_check_offset.as_register());
4556 } else if (must_load_sco) {
4557 assert(temp_reg != noreg, "supply either a temp or a register offset");
4558 }
4559
4560 Label L_fallthrough;
4561 int label_nulls = 0;
4562 if (L_success == nullptr) { L_success = &L_fallthrough; label_nulls++; }
4563 if (L_failure == nullptr) { L_failure = &L_fallthrough; label_nulls++; }
4564 if (L_slow_path == nullptr) { L_slow_path = &L_fallthrough; label_nulls++; }
4565 assert(label_nulls <= 1, "at most one null in the batch");
4566
4567 int sc_offset = in_bytes(Klass::secondary_super_cache_offset());
4568 int sco_offset = in_bytes(Klass::super_check_offset_offset());
4569 Address super_check_offset_addr(super_klass, sco_offset);
4570
4571 // Hacked jcc, which "knows" that L_fallthrough, at least, is in
4572 // range of a jccb. If this routine grows larger, reconsider at
4573 // least some of these.
4574 #define local_jcc(assembler_cond, label) \
4575 if (&(label) == &L_fallthrough) jccb(assembler_cond, label); \
4576 else jcc( assembler_cond, label) /*omit semi*/
4577
4578 // Hacked jmp, which may only be used just before L_fallthrough.
4579 #define final_jmp(label) \
4580 if (&(label) == &L_fallthrough) { /*do nothing*/ } \
4581 else jmp(label) /*omit semi*/
4582
4583 // If the pointers are equal, we are done (e.g., String[] elements).
4584 // This self-check enables sharing of secondary supertype arrays among
4585 // non-primary types such as array-of-interface. Otherwise, each such
4586 // type would need its own customized SSA.
4587 // We move this check to the front of the fast path because many
4588 // type checks are in fact trivially successful in this manner,
4589 // so we get a nicely predicted branch right at the start of the check.
4590 cmpptr(sub_klass, super_klass);
4591 local_jcc(Assembler::equal, *L_success);
4592
4593 // Check the supertype display:
4594 if (must_load_sco) {
4595 // Positive movl does right thing on LP64.
4596 movl(temp_reg, super_check_offset_addr);
4597 super_check_offset = RegisterOrConstant(temp_reg);
4598 }
4599 Address super_check_addr(sub_klass, super_check_offset, Address::times_1, 0);
4600 cmpptr(super_klass, super_check_addr); // load displayed supertype
4601
4602 // This check has worked decisively for primary supers.
4603 // Secondary supers are sought in the super_cache ('super_cache_addr').
4604 // (Secondary supers are interfaces and very deeply nested subtypes.)
4605 // This works in the same check above because of a tricky aliasing
4606 // between the super_cache and the primary super display elements.
4607 // (The 'super_check_addr' can address either, as the case requires.)
4608 // Note that the cache is updated below if it does not help us find
4609 // what we need immediately.
4610 // So if it was a primary super, we can just fail immediately.
4611 // Otherwise, it's the slow path for us (no success at this point).
4612
4613 if (super_check_offset.is_register()) {
4614 local_jcc(Assembler::equal, *L_success);
4615 cmpl(super_check_offset.as_register(), sc_offset);
4616 if (L_failure == &L_fallthrough) {
4617 local_jcc(Assembler::equal, *L_slow_path);
4618 } else {
4619 local_jcc(Assembler::notEqual, *L_failure);
4620 final_jmp(*L_slow_path);
4621 }
4622 } else if (super_check_offset.as_constant() == sc_offset) {
4623 // Need a slow path; fast failure is impossible.
4624 if (L_slow_path == &L_fallthrough) {
4625 local_jcc(Assembler::equal, *L_success);
4626 } else {
4627 local_jcc(Assembler::notEqual, *L_slow_path);
4628 final_jmp(*L_success);
4629 }
4630 } else {
4631 // No slow path; it's a fast decision.
4632 if (L_failure == &L_fallthrough) {
4633 local_jcc(Assembler::equal, *L_success);
4634 } else {
4635 local_jcc(Assembler::notEqual, *L_failure);
4636 final_jmp(*L_success);
4637 }
4638 }
4639
4640 bind(L_fallthrough);
4641
4642 #undef local_jcc
4643 #undef final_jmp
4644 }
4645
4646
4647 void MacroAssembler::check_klass_subtype_slow_path(Register sub_klass,
4648 Register super_klass,
4649 Register temp_reg,
4650 Register temp2_reg,
4651 Label* L_success,
4652 Label* L_failure,
4653 bool set_cond_codes) {
4654 assert_different_registers(sub_klass, super_klass, temp_reg);
4655 if (temp2_reg != noreg)
4656 assert_different_registers(sub_klass, super_klass, temp_reg, temp2_reg);
4657 #define IS_A_TEMP(reg) ((reg) == temp_reg || (reg) == temp2_reg)
4658
4659 Label L_fallthrough;
4660 int label_nulls = 0;
4661 if (L_success == nullptr) { L_success = &L_fallthrough; label_nulls++; }
4662 if (L_failure == nullptr) { L_failure = &L_fallthrough; label_nulls++; }
4663 assert(label_nulls <= 1, "at most one null in the batch");
4664
4665 // a couple of useful fields in sub_klass:
4666 int ss_offset = in_bytes(Klass::secondary_supers_offset());
4667 int sc_offset = in_bytes(Klass::secondary_super_cache_offset());
4668 Address secondary_supers_addr(sub_klass, ss_offset);
4669 Address super_cache_addr( sub_klass, sc_offset);
4670
4671 // Do a linear scan of the secondary super-klass chain.
4672 // This code is rarely used, so simplicity is a virtue here.
4673 // The repne_scan instruction uses fixed registers, which we must spill.
4674 // Don't worry too much about pre-existing connections with the input regs.
4675
4676 assert(sub_klass != rax, "killed reg"); // killed by mov(rax, super)
4677 assert(sub_klass != rcx, "killed reg"); // killed by lea(rcx, &pst_counter)
4678
4679 // Get super_klass value into rax (even if it was in rdi or rcx).
4680 bool pushed_rax = false, pushed_rcx = false, pushed_rdi = false;
4681 if (super_klass != rax) {
4682 if (!IS_A_TEMP(rax)) { push(rax); pushed_rax = true; }
4683 mov(rax, super_klass);
4684 }
4685 if (!IS_A_TEMP(rcx)) { push(rcx); pushed_rcx = true; }
4686 if (!IS_A_TEMP(rdi)) { push(rdi); pushed_rdi = true; }
4687
4688 #ifndef PRODUCT
4689 uint* pst_counter = &SharedRuntime::_partial_subtype_ctr;
4690 ExternalAddress pst_counter_addr((address) pst_counter);
4691 NOT_LP64( incrementl(pst_counter_addr) );
4692 LP64_ONLY( lea(rcx, pst_counter_addr) );
4693 LP64_ONLY( incrementl(Address(rcx, 0)) );
4694 #endif //PRODUCT
4695
4696 // We will consult the secondary-super array.
4697 movptr(rdi, secondary_supers_addr);
4698 // Load the array length. (Positive movl does right thing on LP64.)
4699 movl(rcx, Address(rdi, Array<Klass*>::length_offset_in_bytes()));
4700 // Skip to start of data.
4701 addptr(rdi, Array<Klass*>::base_offset_in_bytes());
4702
4703 // Scan RCX words at [RDI] for an occurrence of RAX.
4704 // Set NZ/Z based on last compare.
4705 // Z flag value will not be set by 'repne' if RCX == 0 since 'repne' does
4706 // not change flags (only scas instruction which is repeated sets flags).
4707 // Set Z = 0 (not equal) before 'repne' to indicate that class was not found.
4708
4709 testptr(rax,rax); // Set Z = 0
4710 repne_scan();
4711
4712 // Unspill the temp. registers:
4713 if (pushed_rdi) pop(rdi);
4714 if (pushed_rcx) pop(rcx);
4715 if (pushed_rax) pop(rax);
4716
4717 if (set_cond_codes) {
4718 // Special hack for the AD files: rdi is guaranteed non-zero.
4719 assert(!pushed_rdi, "rdi must be left non-null");
4720 // Also, the condition codes are properly set Z/NZ on succeed/failure.
4721 }
4722
4723 if (L_failure == &L_fallthrough)
4724 jccb(Assembler::notEqual, *L_failure);
4725 else jcc(Assembler::notEqual, *L_failure);
4726
4727 // Success. Cache the super we found and proceed in triumph.
4728 movptr(super_cache_addr, super_klass);
4729
4730 if (L_success != &L_fallthrough) {
4731 jmp(*L_success);
4732 }
4733
4734 #undef IS_A_TEMP
4735
4736 bind(L_fallthrough);
4737 }
4738
4739 #ifdef _LP64
4740
4741 // population_count variant for running without the POPCNT
4742 // instruction, which was introduced with SSE4.2 in 2008.
4743 void MacroAssembler::population_count(Register dst, Register src,
4744 Register scratch1, Register scratch2) {
4745 assert_different_registers(src, scratch1, scratch2);
4746 if (UsePopCountInstruction) {
4747 Assembler::popcntq(dst, src);
4748 } else {
4749 assert_different_registers(src, scratch1, scratch2);
4750 assert_different_registers(dst, scratch1, scratch2);
4751 Label loop, done;
4752
4753 mov(scratch1, src);
4754 // dst = 0;
4755 // while(scratch1 != 0) {
4756 // dst++;
4757 // scratch1 &= (scratch1 - 1);
4758 // }
4759 xorl(dst, dst);
4760 testq(scratch1, scratch1);
4761 jccb(Assembler::equal, done);
4762 {
4763 bind(loop);
4764 incq(dst);
4765 movq(scratch2, scratch1);
4766 decq(scratch2);
4767 andq(scratch1, scratch2);
4768 jccb(Assembler::notEqual, loop);
4769 }
4770 bind(done);
4771 }
4772 }
4773
4774 // Ensure that the inline code and the stub are using the same registers.
4775 #define LOOKUP_SECONDARY_SUPERS_TABLE_REGISTERS \
4776 do { \
4777 assert(r_super_klass == rax, "mismatch"); \
4778 assert(r_array_base == rbx, "mismatch"); \
4779 assert(r_array_length == rcx, "mismatch"); \
4780 assert(r_array_index == rdx, "mismatch"); \
4781 assert(r_sub_klass == rsi || r_sub_klass == noreg, "mismatch"); \
4782 assert(r_bitmap == r11 || r_bitmap == noreg, "mismatch"); \
4783 assert(result == rdi || result == noreg, "mismatch"); \
4784 } while(0)
4785
4786 void MacroAssembler::lookup_secondary_supers_table(Register r_sub_klass,
4787 Register r_super_klass,
4788 Register temp1,
4789 Register temp2,
4790 Register temp3,
4791 Register temp4,
4792 Register result,
4793 u1 super_klass_slot) {
4794 assert_different_registers(r_sub_klass, r_super_klass, temp1, temp2, temp3, temp4, result);
4795
4796 Label L_fallthrough, L_success, L_failure;
4797
4798 BLOCK_COMMENT("lookup_secondary_supers_table {");
4799
4800 const Register
4801 r_array_index = temp1,
4802 r_array_length = temp2,
4803 r_array_base = temp3,
4804 r_bitmap = temp4;
4805
4806 LOOKUP_SECONDARY_SUPERS_TABLE_REGISTERS;
4807
4808 xorq(result, result); // = 0
4809
4810 movq(r_bitmap, Address(r_sub_klass, Klass::bitmap_offset()));
4811 movq(r_array_index, r_bitmap);
4812
4813 // First check the bitmap to see if super_klass might be present. If
4814 // the bit is zero, we are certain that super_klass is not one of
4815 // the secondary supers.
4816 u1 bit = super_klass_slot;
4817 {
4818 // NB: If the count in a x86 shift instruction is 0, the flags are
4819 // not affected, so we do a testq instead.
4820 int shift_count = Klass::SECONDARY_SUPERS_TABLE_MASK - bit;
4821 if (shift_count != 0) {
4822 salq(r_array_index, shift_count);
4823 } else {
4824 testq(r_array_index, r_array_index);
4825 }
4826 }
4827 // We test the MSB of r_array_index, i.e. its sign bit
4828 jcc(Assembler::positive, L_failure);
4829
4830 // Get the first array index that can contain super_klass into r_array_index.
4831 if (bit != 0) {
4832 population_count(r_array_index, r_array_index, temp2, temp3);
4833 } else {
4834 movl(r_array_index, 1);
4835 }
4836 // NB! r_array_index is off by 1. It is compensated by keeping r_array_base off by 1 word.
4837
4838 // We will consult the secondary-super array.
4839 movptr(r_array_base, Address(r_sub_klass, in_bytes(Klass::secondary_supers_offset())));
4840
4841 // We're asserting that the first word in an Array<Klass*> is the
4842 // length, and the second word is the first word of the data. If
4843 // that ever changes, r_array_base will have to be adjusted here.
4844 assert(Array<Klass*>::base_offset_in_bytes() == wordSize, "Adjust this code");
4845 assert(Array<Klass*>::length_offset_in_bytes() == 0, "Adjust this code");
4846
4847 cmpq(r_super_klass, Address(r_array_base, r_array_index, Address::times_8));
4848 jccb(Assembler::equal, L_success);
4849
4850 // Is there another entry to check? Consult the bitmap.
4851 btq(r_bitmap, (bit + 1) & Klass::SECONDARY_SUPERS_TABLE_MASK);
4852 jccb(Assembler::carryClear, L_failure);
4853
4854 // Linear probe. Rotate the bitmap so that the next bit to test is
4855 // in Bit 1.
4856 if (bit != 0) {
4857 rorq(r_bitmap, bit);
4858 }
4859
4860 // Calls into the stub generated by lookup_secondary_supers_table_slow_path.
4861 // Arguments: r_super_klass, r_array_base, r_array_index, r_bitmap.
4862 // Kills: r_array_length.
4863 // Returns: result.
4864 call(RuntimeAddress(StubRoutines::lookup_secondary_supers_table_slow_path_stub()));
4865 // Result (0/1) is in rdi
4866 jmpb(L_fallthrough);
4867
4868 bind(L_failure);
4869 incq(result); // 0 => 1
4870
4871 bind(L_success);
4872 // result = 0;
4873
4874 bind(L_fallthrough);
4875 BLOCK_COMMENT("} lookup_secondary_supers_table");
4876
4877 if (VerifySecondarySupers) {
4878 verify_secondary_supers_table(r_sub_klass, r_super_klass, result,
4879 temp1, temp2, temp3);
4880 }
4881 }
4882
4883 void MacroAssembler::repne_scanq(Register addr, Register value, Register count, Register limit,
4884 Label* L_success, Label* L_failure) {
4885 Label L_loop, L_fallthrough;
4886 {
4887 int label_nulls = 0;
4888 if (L_success == nullptr) { L_success = &L_fallthrough; label_nulls++; }
4889 if (L_failure == nullptr) { L_failure = &L_fallthrough; label_nulls++; }
4890 assert(label_nulls <= 1, "at most one null in the batch");
4891 }
4892 bind(L_loop);
4893 cmpq(value, Address(addr, count, Address::times_8));
4894 jcc(Assembler::equal, *L_success);
4895 addl(count, 1);
4896 cmpl(count, limit);
4897 jcc(Assembler::less, L_loop);
4898
4899 if (&L_fallthrough != L_failure) {
4900 jmp(*L_failure);
4901 }
4902 bind(L_fallthrough);
4903 }
4904
4905 // Called by code generated by check_klass_subtype_slow_path
4906 // above. This is called when there is a collision in the hashed
4907 // lookup in the secondary supers array.
4908 void MacroAssembler::lookup_secondary_supers_table_slow_path(Register r_super_klass,
4909 Register r_array_base,
4910 Register r_array_index,
4911 Register r_bitmap,
4912 Register temp1,
4913 Register temp2,
4914 Label* L_success,
4915 Label* L_failure) {
4916 assert_different_registers(r_super_klass, r_array_base, r_array_index, r_bitmap, temp1, temp2);
4917
4918 const Register
4919 r_array_length = temp1,
4920 r_sub_klass = noreg,
4921 result = noreg;
4922
4923 LOOKUP_SECONDARY_SUPERS_TABLE_REGISTERS;
4924
4925 Label L_fallthrough;
4926 int label_nulls = 0;
4927 if (L_success == nullptr) { L_success = &L_fallthrough; label_nulls++; }
4928 if (L_failure == nullptr) { L_failure = &L_fallthrough; label_nulls++; }
4929 assert(label_nulls <= 1, "at most one null in the batch");
4930
4931 // Load the array length.
4932 movl(r_array_length, Address(r_array_base, Array<Klass*>::length_offset_in_bytes()));
4933 // And adjust the array base to point to the data.
4934 // NB! Effectively increments current slot index by 1.
4935 assert(Array<Klass*>::base_offset_in_bytes() == wordSize, "");
4936 addptr(r_array_base, Array<Klass*>::base_offset_in_bytes());
4937
4938 // Linear probe
4939 Label L_huge;
4940
4941 // The bitmap is full to bursting.
4942 // Implicit invariant: BITMAP_FULL implies (length > 0)
4943 assert(Klass::SECONDARY_SUPERS_BITMAP_FULL == ~uintx(0), "");
4944 cmpq(r_bitmap, (int32_t)-1); // sign-extends immediate to 64-bit value
4945 jcc(Assembler::equal, L_huge);
4946
4947 // NB! Our caller has checked bits 0 and 1 in the bitmap. The
4948 // current slot (at secondary_supers[r_array_index]) has not yet
4949 // been inspected, and r_array_index may be out of bounds if we
4950 // wrapped around the end of the array.
4951
4952 { // This is conventional linear probing, but instead of terminating
4953 // when a null entry is found in the table, we maintain a bitmap
4954 // in which a 0 indicates missing entries.
4955 // The check above guarantees there are 0s in the bitmap, so the loop
4956 // eventually terminates.
4957
4958 xorl(temp2, temp2); // = 0;
4959
4960 Label L_again;
4961 bind(L_again);
4962
4963 // Check for array wraparound.
4964 cmpl(r_array_index, r_array_length);
4965 cmovl(Assembler::greaterEqual, r_array_index, temp2);
4966
4967 cmpq(r_super_klass, Address(r_array_base, r_array_index, Address::times_8));
4968 jcc(Assembler::equal, *L_success);
4969
4970 // If the next bit in bitmap is zero, we're done.
4971 btq(r_bitmap, 2); // look-ahead check (Bit 2); Bits 0 and 1 are tested by now
4972 jcc(Assembler::carryClear, *L_failure);
4973
4974 rorq(r_bitmap, 1); // Bits 1/2 => 0/1
4975 addl(r_array_index, 1);
4976
4977 jmp(L_again);
4978 }
4979
4980 { // Degenerate case: more than 64 secondary supers.
4981 // FIXME: We could do something smarter here, maybe a vectorized
4982 // comparison or a binary search, but is that worth any added
4983 // complexity?
4984 bind(L_huge);
4985 xorl(r_array_index, r_array_index); // = 0
4986 repne_scanq(r_array_base, r_super_klass, r_array_index, r_array_length,
4987 L_success,
4988 (&L_fallthrough != L_failure ? L_failure : nullptr));
4989
4990 bind(L_fallthrough);
4991 }
4992 }
4993
4994 struct VerifyHelperArguments {
4995 Klass* _super;
4996 Klass* _sub;
4997 intptr_t _linear_result;
4998 intptr_t _table_result;
4999 };
5000
5001 static void verify_secondary_supers_table_helper(const char* msg, VerifyHelperArguments* args) {
5002 Klass::on_secondary_supers_verification_failure(args->_super,
5003 args->_sub,
5004 args->_linear_result,
5005 args->_table_result,
5006 msg);
5007 }
5008
5009 // Make sure that the hashed lookup and a linear scan agree.
5010 void MacroAssembler::verify_secondary_supers_table(Register r_sub_klass,
5011 Register r_super_klass,
5012 Register result,
5013 Register temp1,
5014 Register temp2,
5015 Register temp3) {
5016 const Register
5017 r_array_index = temp1,
5018 r_array_length = temp2,
5019 r_array_base = temp3,
5020 r_bitmap = noreg;
5021
5022 LOOKUP_SECONDARY_SUPERS_TABLE_REGISTERS;
5023
5024 BLOCK_COMMENT("verify_secondary_supers_table {");
5025
5026 Label L_success, L_failure, L_check, L_done;
5027
5028 movptr(r_array_base, Address(r_sub_klass, in_bytes(Klass::secondary_supers_offset())));
5029 movl(r_array_length, Address(r_array_base, Array<Klass*>::length_offset_in_bytes()));
5030 // And adjust the array base to point to the data.
5031 addptr(r_array_base, Array<Klass*>::base_offset_in_bytes());
5032
5033 testl(r_array_length, r_array_length); // array_length == 0?
5034 jcc(Assembler::zero, L_failure);
5035
5036 movl(r_array_index, 0);
5037 repne_scanq(r_array_base, r_super_klass, r_array_index, r_array_length, &L_success);
5038 // fall through to L_failure
5039
5040 const Register linear_result = r_array_index; // reuse temp1
5041
5042 bind(L_failure); // not present
5043 movl(linear_result, 1);
5044 jmp(L_check);
5045
5046 bind(L_success); // present
5047 movl(linear_result, 0);
5048
5049 bind(L_check);
5050 cmpl(linear_result, result);
5051 jcc(Assembler::equal, L_done);
5052
5053 { // To avoid calling convention issues, build a record on the stack
5054 // and pass the pointer to that instead.
5055 push(result);
5056 push(linear_result);
5057 push(r_sub_klass);
5058 push(r_super_klass);
5059 movptr(c_rarg1, rsp);
5060 movptr(c_rarg0, (uintptr_t) "mismatch");
5061 call(RuntimeAddress(CAST_FROM_FN_PTR(address, verify_secondary_supers_table_helper)));
5062 should_not_reach_here();
5063 }
5064 bind(L_done);
5065
5066 BLOCK_COMMENT("} verify_secondary_supers_table");
5067 }
5068
5069 #undef LOOKUP_SECONDARY_SUPERS_TABLE_REGISTERS
5070
5071 #endif // LP64
5072
5073 void MacroAssembler::clinit_barrier(Register klass, Register thread, Label* L_fast_path, Label* L_slow_path) {
5074 assert(L_fast_path != nullptr || L_slow_path != nullptr, "at least one is required");
5075
5076 Label L_fallthrough;
5077 if (L_fast_path == nullptr) {
5078 L_fast_path = &L_fallthrough;
5079 } else if (L_slow_path == nullptr) {
5080 L_slow_path = &L_fallthrough;
5081 }
5082
5083 // Fast path check: class is fully initialized
5084 cmpb(Address(klass, InstanceKlass::init_state_offset()), InstanceKlass::fully_initialized);
5085 jcc(Assembler::equal, *L_fast_path);
5086
5087 // Fast path check: current thread is initializer thread
5088 cmpptr(thread, Address(klass, InstanceKlass::init_thread_offset()));
5089 if (L_slow_path == &L_fallthrough) {
5090 jcc(Assembler::equal, *L_fast_path);
5091 bind(*L_slow_path);
5092 } else if (L_fast_path == &L_fallthrough) {
5093 jcc(Assembler::notEqual, *L_slow_path);
5094 bind(*L_fast_path);
5095 } else {
5096 Unimplemented();
5097 }
5098 }
5099
5100 void MacroAssembler::cmov32(Condition cc, Register dst, Address src) {
5101 if (VM_Version::supports_cmov()) {
5102 cmovl(cc, dst, src);
5103 } else {
5104 Label L;
5105 jccb(negate_condition(cc), L);
5106 movl(dst, src);
5107 bind(L);
5108 }
5109 }
5110
5111 void MacroAssembler::cmov32(Condition cc, Register dst, Register src) {
5112 if (VM_Version::supports_cmov()) {
5113 cmovl(cc, dst, src);
5114 } else {
5115 Label L;
5116 jccb(negate_condition(cc), L);
5117 movl(dst, src);
5118 bind(L);
5119 }
5120 }
5121
5122 void MacroAssembler::_verify_oop(Register reg, const char* s, const char* file, int line) {
5123 if (!VerifyOops) return;
5124
5125 BLOCK_COMMENT("verify_oop {");
5126 #ifdef _LP64
5127 push(rscratch1);
5128 #endif
5129 push(rax); // save rax
5130 push(reg); // pass register argument
5131
5132 // Pass register number to verify_oop_subroutine
5133 const char* b = nullptr;
5134 {
5135 ResourceMark rm;
5136 stringStream ss;
5137 ss.print("verify_oop: %s: %s (%s:%d)", reg->name(), s, file, line);
5138 b = code_string(ss.as_string());
5139 }
5140 ExternalAddress buffer((address) b);
5141 pushptr(buffer.addr(), rscratch1);
5142
5143 // call indirectly to solve generation ordering problem
5144 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address()));
5145 call(rax);
5146 // Caller pops the arguments (oop, message) and restores rax, r10
5147 BLOCK_COMMENT("} verify_oop");
5148 }
5149
5150 void MacroAssembler::vallones(XMMRegister dst, int vector_len) {
5151 if (UseAVX > 2 && (vector_len == Assembler::AVX_512bit || VM_Version::supports_avx512vl())) {
5152 // Only pcmpeq has dependency breaking treatment (i.e the execution can begin without
5153 // waiting for the previous result on dst), not vpcmpeqd, so just use vpternlog
5154 vpternlogd(dst, 0xFF, dst, dst, vector_len);
5155 } else if (VM_Version::supports_avx()) {
5156 vpcmpeqd(dst, dst, dst, vector_len);
5157 } else {
5158 assert(VM_Version::supports_sse2(), "");
5159 pcmpeqd(dst, dst);
5160 }
5161 }
5162
5163 Address MacroAssembler::argument_address(RegisterOrConstant arg_slot,
5164 int extra_slot_offset) {
5165 // cf. TemplateTable::prepare_invoke(), if (load_receiver).
5166 int stackElementSize = Interpreter::stackElementSize;
5167 int offset = Interpreter::expr_offset_in_bytes(extra_slot_offset+0);
5168 #ifdef ASSERT
5169 int offset1 = Interpreter::expr_offset_in_bytes(extra_slot_offset+1);
5170 assert(offset1 - offset == stackElementSize, "correct arithmetic");
5171 #endif
5172 Register scale_reg = noreg;
5173 Address::ScaleFactor scale_factor = Address::no_scale;
5174 if (arg_slot.is_constant()) {
5175 offset += arg_slot.as_constant() * stackElementSize;
5176 } else {
5177 scale_reg = arg_slot.as_register();
5178 scale_factor = Address::times(stackElementSize);
5179 }
5180 offset += wordSize; // return PC is on stack
5181 return Address(rsp, scale_reg, scale_factor, offset);
5182 }
5183
5184 void MacroAssembler::_verify_oop_addr(Address addr, const char* s, const char* file, int line) {
5185 if (!VerifyOops) return;
5186
5187 #ifdef _LP64
5188 push(rscratch1);
5189 #endif
5190 push(rax); // save rax,
5191 // addr may contain rsp so we will have to adjust it based on the push
5192 // we just did (and on 64 bit we do two pushes)
5193 // NOTE: 64bit seemed to have had a bug in that it did movq(addr, rax); which
5194 // stores rax into addr which is backwards of what was intended.
5195 if (addr.uses(rsp)) {
5196 lea(rax, addr);
5197 pushptr(Address(rax, LP64_ONLY(2 *) BytesPerWord));
5198 } else {
5199 pushptr(addr);
5200 }
5201
5202 // Pass register number to verify_oop_subroutine
5203 const char* b = nullptr;
5204 {
5205 ResourceMark rm;
5206 stringStream ss;
5207 ss.print("verify_oop_addr: %s (%s:%d)", s, file, line);
5208 b = code_string(ss.as_string());
5209 }
5210 ExternalAddress buffer((address) b);
5211 pushptr(buffer.addr(), rscratch1);
5212
5213 // call indirectly to solve generation ordering problem
5214 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address()));
5215 call(rax);
5216 // Caller pops the arguments (addr, message) and restores rax, r10.
5217 }
5218
5219 void MacroAssembler::verify_tlab() {
5220 #ifdef ASSERT
5221 if (UseTLAB && VerifyOops) {
5222 Label next, ok;
5223 Register t1 = rsi;
5224 Register thread_reg = NOT_LP64(rbx) LP64_ONLY(r15_thread);
5225
5226 push(t1);
5227 NOT_LP64(push(thread_reg));
5228 NOT_LP64(get_thread(thread_reg));
5229
5230 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset())));
5231 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_start_offset())));
5232 jcc(Assembler::aboveEqual, next);
5233 STOP("assert(top >= start)");
5234 should_not_reach_here();
5235
5236 bind(next);
5237 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_end_offset())));
5238 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset())));
5239 jcc(Assembler::aboveEqual, ok);
5240 STOP("assert(top <= end)");
5241 should_not_reach_here();
5242
5243 bind(ok);
5244 NOT_LP64(pop(thread_reg));
5245 pop(t1);
5246 }
5247 #endif
5248 }
5249
5250 class ControlWord {
5251 public:
5252 int32_t _value;
5253
5254 int rounding_control() const { return (_value >> 10) & 3 ; }
5255 int precision_control() const { return (_value >> 8) & 3 ; }
5256 bool precision() const { return ((_value >> 5) & 1) != 0; }
5257 bool underflow() const { return ((_value >> 4) & 1) != 0; }
5258 bool overflow() const { return ((_value >> 3) & 1) != 0; }
5259 bool zero_divide() const { return ((_value >> 2) & 1) != 0; }
5260 bool denormalized() const { return ((_value >> 1) & 1) != 0; }
5261 bool invalid() const { return ((_value >> 0) & 1) != 0; }
5262
5263 void print() const {
5264 // rounding control
5265 const char* rc;
5266 switch (rounding_control()) {
5267 case 0: rc = "round near"; break;
5268 case 1: rc = "round down"; break;
5269 case 2: rc = "round up "; break;
5270 case 3: rc = "chop "; break;
5271 default:
5272 rc = nullptr; // silence compiler warnings
5273 fatal("Unknown rounding control: %d", rounding_control());
5274 };
5275 // precision control
5276 const char* pc;
5277 switch (precision_control()) {
5278 case 0: pc = "24 bits "; break;
5279 case 1: pc = "reserved"; break;
5280 case 2: pc = "53 bits "; break;
5281 case 3: pc = "64 bits "; break;
5282 default:
5283 pc = nullptr; // silence compiler warnings
5284 fatal("Unknown precision control: %d", precision_control());
5285 };
5286 // flags
5287 char f[9];
5288 f[0] = ' ';
5289 f[1] = ' ';
5290 f[2] = (precision ()) ? 'P' : 'p';
5291 f[3] = (underflow ()) ? 'U' : 'u';
5292 f[4] = (overflow ()) ? 'O' : 'o';
5293 f[5] = (zero_divide ()) ? 'Z' : 'z';
5294 f[6] = (denormalized()) ? 'D' : 'd';
5295 f[7] = (invalid ()) ? 'I' : 'i';
5296 f[8] = '\x0';
5297 // output
5298 printf("%04x masks = %s, %s, %s", _value & 0xFFFF, f, rc, pc);
5299 }
5300
5301 };
5302
5303 class StatusWord {
5304 public:
5305 int32_t _value;
5306
5307 bool busy() const { return ((_value >> 15) & 1) != 0; }
5308 bool C3() const { return ((_value >> 14) & 1) != 0; }
5309 bool C2() const { return ((_value >> 10) & 1) != 0; }
5310 bool C1() const { return ((_value >> 9) & 1) != 0; }
5311 bool C0() const { return ((_value >> 8) & 1) != 0; }
5312 int top() const { return (_value >> 11) & 7 ; }
5313 bool error_status() const { return ((_value >> 7) & 1) != 0; }
5314 bool stack_fault() const { return ((_value >> 6) & 1) != 0; }
5315 bool precision() const { return ((_value >> 5) & 1) != 0; }
5316 bool underflow() const { return ((_value >> 4) & 1) != 0; }
5317 bool overflow() const { return ((_value >> 3) & 1) != 0; }
5318 bool zero_divide() const { return ((_value >> 2) & 1) != 0; }
5319 bool denormalized() const { return ((_value >> 1) & 1) != 0; }
5320 bool invalid() const { return ((_value >> 0) & 1) != 0; }
5321
5322 void print() const {
5323 // condition codes
5324 char c[5];
5325 c[0] = (C3()) ? '3' : '-';
5326 c[1] = (C2()) ? '2' : '-';
5327 c[2] = (C1()) ? '1' : '-';
5328 c[3] = (C0()) ? '0' : '-';
5329 c[4] = '\x0';
5330 // flags
5331 char f[9];
5332 f[0] = (error_status()) ? 'E' : '-';
5333 f[1] = (stack_fault ()) ? 'S' : '-';
5334 f[2] = (precision ()) ? 'P' : '-';
5335 f[3] = (underflow ()) ? 'U' : '-';
5336 f[4] = (overflow ()) ? 'O' : '-';
5337 f[5] = (zero_divide ()) ? 'Z' : '-';
5338 f[6] = (denormalized()) ? 'D' : '-';
5339 f[7] = (invalid ()) ? 'I' : '-';
5340 f[8] = '\x0';
5341 // output
5342 printf("%04x flags = %s, cc = %s, top = %d", _value & 0xFFFF, f, c, top());
5343 }
5344
5345 };
5346
5347 class TagWord {
5348 public:
5349 int32_t _value;
5350
5351 int tag_at(int i) const { return (_value >> (i*2)) & 3; }
5352
5353 void print() const {
5354 printf("%04x", _value & 0xFFFF);
5355 }
5356
5357 };
5358
5359 class FPU_Register {
5360 public:
5361 int32_t _m0;
5362 int32_t _m1;
5363 int16_t _ex;
5364
5365 bool is_indefinite() const {
5366 return _ex == -1 && _m1 == (int32_t)0xC0000000 && _m0 == 0;
5367 }
5368
5369 void print() const {
5370 char sign = (_ex < 0) ? '-' : '+';
5371 const char* kind = (_ex == 0x7FFF || _ex == (int16_t)-1) ? "NaN" : " ";
5372 printf("%c%04hx.%08x%08x %s", sign, _ex, _m1, _m0, kind);
5373 };
5374
5375 };
5376
5377 class FPU_State {
5378 public:
5379 enum {
5380 register_size = 10,
5381 number_of_registers = 8,
5382 register_mask = 7
5383 };
5384
5385 ControlWord _control_word;
5386 StatusWord _status_word;
5387 TagWord _tag_word;
5388 int32_t _error_offset;
5389 int32_t _error_selector;
5390 int32_t _data_offset;
5391 int32_t _data_selector;
5392 int8_t _register[register_size * number_of_registers];
5393
5394 int tag_for_st(int i) const { return _tag_word.tag_at((_status_word.top() + i) & register_mask); }
5395 FPU_Register* st(int i) const { return (FPU_Register*)&_register[register_size * i]; }
5396
5397 const char* tag_as_string(int tag) const {
5398 switch (tag) {
5399 case 0: return "valid";
5400 case 1: return "zero";
5401 case 2: return "special";
5402 case 3: return "empty";
5403 }
5404 ShouldNotReachHere();
5405 return nullptr;
5406 }
5407
5408 void print() const {
5409 // print computation registers
5410 { int t = _status_word.top();
5411 for (int i = 0; i < number_of_registers; i++) {
5412 int j = (i - t) & register_mask;
5413 printf("%c r%d = ST%d = ", (j == 0 ? '*' : ' '), i, j);
5414 st(j)->print();
5415 printf(" %s\n", tag_as_string(_tag_word.tag_at(i)));
5416 }
5417 }
5418 printf("\n");
5419 // print control registers
5420 printf("ctrl = "); _control_word.print(); printf("\n");
5421 printf("stat = "); _status_word .print(); printf("\n");
5422 printf("tags = "); _tag_word .print(); printf("\n");
5423 }
5424
5425 };
5426
5427 class Flag_Register {
5428 public:
5429 int32_t _value;
5430
5431 bool overflow() const { return ((_value >> 11) & 1) != 0; }
5432 bool direction() const { return ((_value >> 10) & 1) != 0; }
5433 bool sign() const { return ((_value >> 7) & 1) != 0; }
5434 bool zero() const { return ((_value >> 6) & 1) != 0; }
5435 bool auxiliary_carry() const { return ((_value >> 4) & 1) != 0; }
5436 bool parity() const { return ((_value >> 2) & 1) != 0; }
5437 bool carry() const { return ((_value >> 0) & 1) != 0; }
5438
5439 void print() const {
5440 // flags
5441 char f[8];
5442 f[0] = (overflow ()) ? 'O' : '-';
5443 f[1] = (direction ()) ? 'D' : '-';
5444 f[2] = (sign ()) ? 'S' : '-';
5445 f[3] = (zero ()) ? 'Z' : '-';
5446 f[4] = (auxiliary_carry()) ? 'A' : '-';
5447 f[5] = (parity ()) ? 'P' : '-';
5448 f[6] = (carry ()) ? 'C' : '-';
5449 f[7] = '\x0';
5450 // output
5451 printf("%08x flags = %s", _value, f);
5452 }
5453
5454 };
5455
5456 class IU_Register {
5457 public:
5458 int32_t _value;
5459
5460 void print() const {
5461 printf("%08x %11d", _value, _value);
5462 }
5463
5464 };
5465
5466 class IU_State {
5467 public:
5468 Flag_Register _eflags;
5469 IU_Register _rdi;
5470 IU_Register _rsi;
5471 IU_Register _rbp;
5472 IU_Register _rsp;
5473 IU_Register _rbx;
5474 IU_Register _rdx;
5475 IU_Register _rcx;
5476 IU_Register _rax;
5477
5478 void print() const {
5479 // computation registers
5480 printf("rax, = "); _rax.print(); printf("\n");
5481 printf("rbx, = "); _rbx.print(); printf("\n");
5482 printf("rcx = "); _rcx.print(); printf("\n");
5483 printf("rdx = "); _rdx.print(); printf("\n");
5484 printf("rdi = "); _rdi.print(); printf("\n");
5485 printf("rsi = "); _rsi.print(); printf("\n");
5486 printf("rbp, = "); _rbp.print(); printf("\n");
5487 printf("rsp = "); _rsp.print(); printf("\n");
5488 printf("\n");
5489 // control registers
5490 printf("flgs = "); _eflags.print(); printf("\n");
5491 }
5492 };
5493
5494
5495 class CPU_State {
5496 public:
5497 FPU_State _fpu_state;
5498 IU_State _iu_state;
5499
5500 void print() const {
5501 printf("--------------------------------------------------\n");
5502 _iu_state .print();
5503 printf("\n");
5504 _fpu_state.print();
5505 printf("--------------------------------------------------\n");
5506 }
5507
5508 };
5509
5510
5511 static void _print_CPU_state(CPU_State* state) {
5512 state->print();
5513 };
5514
5515
5516 void MacroAssembler::print_CPU_state() {
5517 push_CPU_state();
5518 push(rsp); // pass CPU state
5519 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _print_CPU_state)));
5520 addptr(rsp, wordSize); // discard argument
5521 pop_CPU_state();
5522 }
5523
5524
5525 #ifndef _LP64
5526 static bool _verify_FPU(int stack_depth, char* s, CPU_State* state) {
5527 static int counter = 0;
5528 FPU_State* fs = &state->_fpu_state;
5529 counter++;
5530 // For leaf calls, only verify that the top few elements remain empty.
5531 // We only need 1 empty at the top for C2 code.
5532 if( stack_depth < 0 ) {
5533 if( fs->tag_for_st(7) != 3 ) {
5534 printf("FPR7 not empty\n");
5535 state->print();
5536 assert(false, "error");
5537 return false;
5538 }
5539 return true; // All other stack states do not matter
5540 }
5541
5542 assert((fs->_control_word._value & 0xffff) == StubRoutines::x86::fpu_cntrl_wrd_std(),
5543 "bad FPU control word");
5544
5545 // compute stack depth
5546 int i = 0;
5547 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) < 3) i++;
5548 int d = i;
5549 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) == 3) i++;
5550 // verify findings
5551 if (i != FPU_State::number_of_registers) {
5552 // stack not contiguous
5553 printf("%s: stack not contiguous at ST%d\n", s, i);
5554 state->print();
5555 assert(false, "error");
5556 return false;
5557 }
5558 // check if computed stack depth corresponds to expected stack depth
5559 if (stack_depth < 0) {
5560 // expected stack depth is -stack_depth or less
5561 if (d > -stack_depth) {
5562 // too many elements on the stack
5563 printf("%s: <= %d stack elements expected but found %d\n", s, -stack_depth, d);
5564 state->print();
5565 assert(false, "error");
5566 return false;
5567 }
5568 } else {
5569 // expected stack depth is stack_depth
5570 if (d != stack_depth) {
5571 // wrong stack depth
5572 printf("%s: %d stack elements expected but found %d\n", s, stack_depth, d);
5573 state->print();
5574 assert(false, "error");
5575 return false;
5576 }
5577 }
5578 // everything is cool
5579 return true;
5580 }
5581
5582 void MacroAssembler::verify_FPU(int stack_depth, const char* s) {
5583 if (!VerifyFPU) return;
5584 push_CPU_state();
5585 push(rsp); // pass CPU state
5586 ExternalAddress msg((address) s);
5587 // pass message string s
5588 pushptr(msg.addr(), noreg);
5589 push(stack_depth); // pass stack depth
5590 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _verify_FPU)));
5591 addptr(rsp, 3 * wordSize); // discard arguments
5592 // check for error
5593 { Label L;
5594 testl(rax, rax);
5595 jcc(Assembler::notZero, L);
5596 int3(); // break if error condition
5597 bind(L);
5598 }
5599 pop_CPU_state();
5600 }
5601 #endif // _LP64
5602
5603 void MacroAssembler::restore_cpu_control_state_after_jni(Register rscratch) {
5604 // Either restore the MXCSR register after returning from the JNI Call
5605 // or verify that it wasn't changed (with -Xcheck:jni flag).
5606 if (VM_Version::supports_sse()) {
5607 if (RestoreMXCSROnJNICalls) {
5608 ldmxcsr(ExternalAddress(StubRoutines::x86::addr_mxcsr_std()), rscratch);
5609 } else if (CheckJNICalls) {
5610 call(RuntimeAddress(StubRoutines::x86::verify_mxcsr_entry()));
5611 }
5612 }
5613 // Clear upper bits of YMM registers to avoid SSE <-> AVX transition penalty.
5614 vzeroupper();
5615
5616 #ifndef _LP64
5617 // Either restore the x87 floating pointer control word after returning
5618 // from the JNI call or verify that it wasn't changed.
5619 if (CheckJNICalls) {
5620 call(RuntimeAddress(StubRoutines::x86::verify_fpu_cntrl_wrd_entry()));
5621 }
5622 #endif // _LP64
5623 }
5624
5625 // ((OopHandle)result).resolve();
5626 void MacroAssembler::resolve_oop_handle(Register result, Register tmp) {
5627 assert_different_registers(result, tmp);
5628
5629 // Only 64 bit platforms support GCs that require a tmp register
5630 // Only IN_HEAP loads require a thread_tmp register
5631 // OopHandle::resolve is an indirection like jobject.
5632 access_load_at(T_OBJECT, IN_NATIVE,
5633 result, Address(result, 0), tmp, /*tmp_thread*/noreg);
5634 }
5635
5636 // ((WeakHandle)result).resolve();
5637 void MacroAssembler::resolve_weak_handle(Register rresult, Register rtmp) {
5638 assert_different_registers(rresult, rtmp);
5639 Label resolved;
5640
5641 // A null weak handle resolves to null.
5642 cmpptr(rresult, 0);
5643 jcc(Assembler::equal, resolved);
5644
5645 // Only 64 bit platforms support GCs that require a tmp register
5646 // Only IN_HEAP loads require a thread_tmp register
5647 // WeakHandle::resolve is an indirection like jweak.
5648 access_load_at(T_OBJECT, IN_NATIVE | ON_PHANTOM_OOP_REF,
5649 rresult, Address(rresult, 0), rtmp, /*tmp_thread*/noreg);
5650 bind(resolved);
5651 }
5652
5653 void MacroAssembler::load_mirror(Register mirror, Register method, Register tmp) {
5654 // get mirror
5655 const int mirror_offset = in_bytes(Klass::java_mirror_offset());
5656 load_method_holder(mirror, method);
5657 movptr(mirror, Address(mirror, mirror_offset));
5658 resolve_oop_handle(mirror, tmp);
5659 }
5660
5661 void MacroAssembler::load_method_holder_cld(Register rresult, Register rmethod) {
5662 load_method_holder(rresult, rmethod);
5663 movptr(rresult, Address(rresult, InstanceKlass::class_loader_data_offset()));
5664 }
5665
5666 void MacroAssembler::load_method_holder(Register holder, Register method) {
5667 movptr(holder, Address(method, Method::const_offset())); // ConstMethod*
5668 movptr(holder, Address(holder, ConstMethod::constants_offset())); // ConstantPool*
5669 movptr(holder, Address(holder, ConstantPool::pool_holder_offset())); // InstanceKlass*
5670 }
5671
5672 void MacroAssembler::load_klass(Register dst, Register src, Register tmp) {
5673 assert_different_registers(src, tmp);
5674 assert_different_registers(dst, tmp);
5675 #ifdef _LP64
5676 if (UseCompressedClassPointers) {
5677 movl(dst, Address(src, oopDesc::klass_offset_in_bytes()));
5678 decode_klass_not_null(dst, tmp);
5679 } else
5680 #endif
5681 movptr(dst, Address(src, oopDesc::klass_offset_in_bytes()));
5682 }
5683
5684 void MacroAssembler::store_klass(Register dst, Register src, Register tmp) {
5685 assert_different_registers(src, tmp);
5686 assert_different_registers(dst, tmp);
5687 #ifdef _LP64
5688 if (UseCompressedClassPointers) {
5689 encode_klass_not_null(src, tmp);
5690 movl(Address(dst, oopDesc::klass_offset_in_bytes()), src);
5691 } else
5692 #endif
5693 movptr(Address(dst, oopDesc::klass_offset_in_bytes()), src);
5694 }
5695
5696 void MacroAssembler::access_load_at(BasicType type, DecoratorSet decorators, Register dst, Address src,
5697 Register tmp1, Register thread_tmp) {
5698 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
5699 decorators = AccessInternal::decorator_fixup(decorators, type);
5700 bool as_raw = (decorators & AS_RAW) != 0;
5701 if (as_raw) {
5702 bs->BarrierSetAssembler::load_at(this, decorators, type, dst, src, tmp1, thread_tmp);
5703 } else {
5704 bs->load_at(this, decorators, type, dst, src, tmp1, thread_tmp);
5705 }
5706 }
5707
5708 void MacroAssembler::access_store_at(BasicType type, DecoratorSet decorators, Address dst, Register val,
5709 Register tmp1, Register tmp2, Register tmp3) {
5710 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
5711 decorators = AccessInternal::decorator_fixup(decorators, type);
5712 bool as_raw = (decorators & AS_RAW) != 0;
5713 if (as_raw) {
5714 bs->BarrierSetAssembler::store_at(this, decorators, type, dst, val, tmp1, tmp2, tmp3);
5715 } else {
5716 bs->store_at(this, decorators, type, dst, val, tmp1, tmp2, tmp3);
5717 }
5718 }
5719
5720 void MacroAssembler::load_heap_oop(Register dst, Address src, Register tmp1,
5721 Register thread_tmp, DecoratorSet decorators) {
5722 access_load_at(T_OBJECT, IN_HEAP | decorators, dst, src, tmp1, thread_tmp);
5723 }
5724
5725 // Doesn't do verification, generates fixed size code
5726 void MacroAssembler::load_heap_oop_not_null(Register dst, Address src, Register tmp1,
5727 Register thread_tmp, DecoratorSet decorators) {
5728 access_load_at(T_OBJECT, IN_HEAP | IS_NOT_NULL | decorators, dst, src, tmp1, thread_tmp);
5729 }
5730
5731 void MacroAssembler::store_heap_oop(Address dst, Register val, Register tmp1,
5732 Register tmp2, Register tmp3, DecoratorSet decorators) {
5733 access_store_at(T_OBJECT, IN_HEAP | decorators, dst, val, tmp1, tmp2, tmp3);
5734 }
5735
5736 // Used for storing nulls.
5737 void MacroAssembler::store_heap_oop_null(Address dst) {
5738 access_store_at(T_OBJECT, IN_HEAP, dst, noreg, noreg, noreg, noreg);
5739 }
5740
5741 #ifdef _LP64
5742 void MacroAssembler::store_klass_gap(Register dst, Register src) {
5743 if (UseCompressedClassPointers) {
5744 // Store to klass gap in destination
5745 movl(Address(dst, oopDesc::klass_gap_offset_in_bytes()), src);
5746 }
5747 }
5748
5749 #ifdef ASSERT
5750 void MacroAssembler::verify_heapbase(const char* msg) {
5751 assert (UseCompressedOops, "should be compressed");
5752 assert (Universe::heap() != nullptr, "java heap should be initialized");
5753 if (CheckCompressedOops) {
5754 Label ok;
5755 ExternalAddress src2(CompressedOops::ptrs_base_addr());
5756 const bool is_src2_reachable = reachable(src2);
5757 if (!is_src2_reachable) {
5758 push(rscratch1); // cmpptr trashes rscratch1
5759 }
5760 cmpptr(r12_heapbase, src2, rscratch1);
5761 jcc(Assembler::equal, ok);
5762 STOP(msg);
5763 bind(ok);
5764 if (!is_src2_reachable) {
5765 pop(rscratch1);
5766 }
5767 }
5768 }
5769 #endif
5770
5771 // Algorithm must match oop.inline.hpp encode_heap_oop.
5772 void MacroAssembler::encode_heap_oop(Register r) {
5773 #ifdef ASSERT
5774 verify_heapbase("MacroAssembler::encode_heap_oop: heap base corrupted?");
5775 #endif
5776 verify_oop_msg(r, "broken oop in encode_heap_oop");
5777 if (CompressedOops::base() == nullptr) {
5778 if (CompressedOops::shift() != 0) {
5779 assert (LogMinObjAlignmentInBytes == CompressedOops::shift(), "decode alg wrong");
5780 shrq(r, LogMinObjAlignmentInBytes);
5781 }
5782 return;
5783 }
5784 testq(r, r);
5785 cmovq(Assembler::equal, r, r12_heapbase);
5786 subq(r, r12_heapbase);
5787 shrq(r, LogMinObjAlignmentInBytes);
5788 }
5789
5790 void MacroAssembler::encode_heap_oop_not_null(Register r) {
5791 #ifdef ASSERT
5792 verify_heapbase("MacroAssembler::encode_heap_oop_not_null: heap base corrupted?");
5793 if (CheckCompressedOops) {
5794 Label ok;
5795 testq(r, r);
5796 jcc(Assembler::notEqual, ok);
5797 STOP("null oop passed to encode_heap_oop_not_null");
5798 bind(ok);
5799 }
5800 #endif
5801 verify_oop_msg(r, "broken oop in encode_heap_oop_not_null");
5802 if (CompressedOops::base() != nullptr) {
5803 subq(r, r12_heapbase);
5804 }
5805 if (CompressedOops::shift() != 0) {
5806 assert (LogMinObjAlignmentInBytes == CompressedOops::shift(), "decode alg wrong");
5807 shrq(r, LogMinObjAlignmentInBytes);
5808 }
5809 }
5810
5811 void MacroAssembler::encode_heap_oop_not_null(Register dst, Register src) {
5812 #ifdef ASSERT
5813 verify_heapbase("MacroAssembler::encode_heap_oop_not_null2: heap base corrupted?");
5814 if (CheckCompressedOops) {
5815 Label ok;
5816 testq(src, src);
5817 jcc(Assembler::notEqual, ok);
5818 STOP("null oop passed to encode_heap_oop_not_null2");
5819 bind(ok);
5820 }
5821 #endif
5822 verify_oop_msg(src, "broken oop in encode_heap_oop_not_null2");
5823 if (dst != src) {
5824 movq(dst, src);
5825 }
5826 if (CompressedOops::base() != nullptr) {
5827 subq(dst, r12_heapbase);
5828 }
5829 if (CompressedOops::shift() != 0) {
5830 assert (LogMinObjAlignmentInBytes == CompressedOops::shift(), "decode alg wrong");
5831 shrq(dst, LogMinObjAlignmentInBytes);
5832 }
5833 }
5834
5835 void MacroAssembler::decode_heap_oop(Register r) {
5836 #ifdef ASSERT
5837 verify_heapbase("MacroAssembler::decode_heap_oop: heap base corrupted?");
5838 #endif
5839 if (CompressedOops::base() == nullptr) {
5840 if (CompressedOops::shift() != 0) {
5841 assert (LogMinObjAlignmentInBytes == CompressedOops::shift(), "decode alg wrong");
5842 shlq(r, LogMinObjAlignmentInBytes);
5843 }
5844 } else {
5845 Label done;
5846 shlq(r, LogMinObjAlignmentInBytes);
5847 jccb(Assembler::equal, done);
5848 addq(r, r12_heapbase);
5849 bind(done);
5850 }
5851 verify_oop_msg(r, "broken oop in decode_heap_oop");
5852 }
5853
5854 void MacroAssembler::decode_heap_oop_not_null(Register r) {
5855 // Note: it will change flags
5856 assert (UseCompressedOops, "should only be used for compressed headers");
5857 assert (Universe::heap() != nullptr, "java heap should be initialized");
5858 // Cannot assert, unverified entry point counts instructions (see .ad file)
5859 // vtableStubs also counts instructions in pd_code_size_limit.
5860 // Also do not verify_oop as this is called by verify_oop.
5861 if (CompressedOops::shift() != 0) {
5862 assert(LogMinObjAlignmentInBytes == CompressedOops::shift(), "decode alg wrong");
5863 shlq(r, LogMinObjAlignmentInBytes);
5864 if (CompressedOops::base() != nullptr) {
5865 addq(r, r12_heapbase);
5866 }
5867 } else {
5868 assert (CompressedOops::base() == nullptr, "sanity");
5869 }
5870 }
5871
5872 void MacroAssembler::decode_heap_oop_not_null(Register dst, Register src) {
5873 // Note: it will change flags
5874 assert (UseCompressedOops, "should only be used for compressed headers");
5875 assert (Universe::heap() != nullptr, "java heap should be initialized");
5876 // Cannot assert, unverified entry point counts instructions (see .ad file)
5877 // vtableStubs also counts instructions in pd_code_size_limit.
5878 // Also do not verify_oop as this is called by verify_oop.
5879 if (CompressedOops::shift() != 0) {
5880 assert(LogMinObjAlignmentInBytes == CompressedOops::shift(), "decode alg wrong");
5881 if (LogMinObjAlignmentInBytes == Address::times_8) {
5882 leaq(dst, Address(r12_heapbase, src, Address::times_8, 0));
5883 } else {
5884 if (dst != src) {
5885 movq(dst, src);
5886 }
5887 shlq(dst, LogMinObjAlignmentInBytes);
5888 if (CompressedOops::base() != nullptr) {
5889 addq(dst, r12_heapbase);
5890 }
5891 }
5892 } else {
5893 assert (CompressedOops::base() == nullptr, "sanity");
5894 if (dst != src) {
5895 movq(dst, src);
5896 }
5897 }
5898 }
5899
5900 void MacroAssembler::encode_klass_not_null(Register r, Register tmp) {
5901 assert_different_registers(r, tmp);
5902 if (CompressedKlassPointers::base() != nullptr) {
5903 mov64(tmp, (int64_t)CompressedKlassPointers::base());
5904 subq(r, tmp);
5905 }
5906 if (CompressedKlassPointers::shift() != 0) {
5907 assert (LogKlassAlignmentInBytes == CompressedKlassPointers::shift(), "decode alg wrong");
5908 shrq(r, LogKlassAlignmentInBytes);
5909 }
5910 }
5911
5912 void MacroAssembler::encode_and_move_klass_not_null(Register dst, Register src) {
5913 assert_different_registers(src, dst);
5914 if (CompressedKlassPointers::base() != nullptr) {
5915 mov64(dst, -(int64_t)CompressedKlassPointers::base());
5916 addq(dst, src);
5917 } else {
5918 movptr(dst, src);
5919 }
5920 if (CompressedKlassPointers::shift() != 0) {
5921 assert (LogKlassAlignmentInBytes == CompressedKlassPointers::shift(), "decode alg wrong");
5922 shrq(dst, LogKlassAlignmentInBytes);
5923 }
5924 }
5925
5926 void MacroAssembler::decode_klass_not_null(Register r, Register tmp) {
5927 assert_different_registers(r, tmp);
5928 // Note: it will change flags
5929 assert(UseCompressedClassPointers, "should only be used for compressed headers");
5930 // Cannot assert, unverified entry point counts instructions (see .ad file)
5931 // vtableStubs also counts instructions in pd_code_size_limit.
5932 // Also do not verify_oop as this is called by verify_oop.
5933 if (CompressedKlassPointers::shift() != 0) {
5934 assert(LogKlassAlignmentInBytes == CompressedKlassPointers::shift(), "decode alg wrong");
5935 shlq(r, LogKlassAlignmentInBytes);
5936 }
5937 if (CompressedKlassPointers::base() != nullptr) {
5938 mov64(tmp, (int64_t)CompressedKlassPointers::base());
5939 addq(r, tmp);
5940 }
5941 }
5942
5943 void MacroAssembler::decode_and_move_klass_not_null(Register dst, Register src) {
5944 assert_different_registers(src, dst);
5945 // Note: it will change flags
5946 assert (UseCompressedClassPointers, "should only be used for compressed headers");
5947 // Cannot assert, unverified entry point counts instructions (see .ad file)
5948 // vtableStubs also counts instructions in pd_code_size_limit.
5949 // Also do not verify_oop as this is called by verify_oop.
5950
5951 if (CompressedKlassPointers::base() == nullptr &&
5952 CompressedKlassPointers::shift() == 0) {
5953 // The best case scenario is that there is no base or shift. Then it is already
5954 // a pointer that needs nothing but a register rename.
5955 movl(dst, src);
5956 } else {
5957 if (CompressedKlassPointers::base() != nullptr) {
5958 mov64(dst, (int64_t)CompressedKlassPointers::base());
5959 } else {
5960 xorq(dst, dst);
5961 }
5962 if (CompressedKlassPointers::shift() != 0) {
5963 assert(LogKlassAlignmentInBytes == CompressedKlassPointers::shift(), "decode alg wrong");
5964 assert(LogKlassAlignmentInBytes == Address::times_8, "klass not aligned on 64bits?");
5965 leaq(dst, Address(dst, src, Address::times_8, 0));
5966 } else {
5967 addq(dst, src);
5968 }
5969 }
5970 }
5971
5972 void MacroAssembler::set_narrow_oop(Register dst, jobject obj) {
5973 assert (UseCompressedOops, "should only be used for compressed headers");
5974 assert (Universe::heap() != nullptr, "java heap should be initialized");
5975 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
5976 int oop_index = oop_recorder()->find_index(obj);
5977 RelocationHolder rspec = oop_Relocation::spec(oop_index);
5978 mov_narrow_oop(dst, oop_index, rspec);
5979 }
5980
5981 void MacroAssembler::set_narrow_oop(Address dst, jobject obj) {
5982 assert (UseCompressedOops, "should only be used for compressed headers");
5983 assert (Universe::heap() != nullptr, "java heap should be initialized");
5984 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
5985 int oop_index = oop_recorder()->find_index(obj);
5986 RelocationHolder rspec = oop_Relocation::spec(oop_index);
5987 mov_narrow_oop(dst, oop_index, rspec);
5988 }
5989
5990 void MacroAssembler::set_narrow_klass(Register dst, Klass* k) {
5991 assert (UseCompressedClassPointers, "should only be used for compressed headers");
5992 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
5993 int klass_index = oop_recorder()->find_index(k);
5994 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
5995 mov_narrow_oop(dst, CompressedKlassPointers::encode(k), rspec);
5996 }
5997
5998 void MacroAssembler::set_narrow_klass(Address dst, Klass* k) {
5999 assert (UseCompressedClassPointers, "should only be used for compressed headers");
6000 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
6001 int klass_index = oop_recorder()->find_index(k);
6002 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
6003 mov_narrow_oop(dst, CompressedKlassPointers::encode(k), rspec);
6004 }
6005
6006 void MacroAssembler::cmp_narrow_oop(Register dst, jobject obj) {
6007 assert (UseCompressedOops, "should only be used for compressed headers");
6008 assert (Universe::heap() != nullptr, "java heap should be initialized");
6009 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
6010 int oop_index = oop_recorder()->find_index(obj);
6011 RelocationHolder rspec = oop_Relocation::spec(oop_index);
6012 Assembler::cmp_narrow_oop(dst, oop_index, rspec);
6013 }
6014
6015 void MacroAssembler::cmp_narrow_oop(Address dst, jobject obj) {
6016 assert (UseCompressedOops, "should only be used for compressed headers");
6017 assert (Universe::heap() != nullptr, "java heap should be initialized");
6018 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
6019 int oop_index = oop_recorder()->find_index(obj);
6020 RelocationHolder rspec = oop_Relocation::spec(oop_index);
6021 Assembler::cmp_narrow_oop(dst, oop_index, rspec);
6022 }
6023
6024 void MacroAssembler::cmp_narrow_klass(Register dst, Klass* k) {
6025 assert (UseCompressedClassPointers, "should only be used for compressed headers");
6026 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
6027 int klass_index = oop_recorder()->find_index(k);
6028 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
6029 Assembler::cmp_narrow_oop(dst, CompressedKlassPointers::encode(k), rspec);
6030 }
6031
6032 void MacroAssembler::cmp_narrow_klass(Address dst, Klass* k) {
6033 assert (UseCompressedClassPointers, "should only be used for compressed headers");
6034 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
6035 int klass_index = oop_recorder()->find_index(k);
6036 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
6037 Assembler::cmp_narrow_oop(dst, CompressedKlassPointers::encode(k), rspec);
6038 }
6039
6040 void MacroAssembler::reinit_heapbase() {
6041 if (UseCompressedOops) {
6042 if (Universe::heap() != nullptr) {
6043 if (CompressedOops::base() == nullptr) {
6044 MacroAssembler::xorptr(r12_heapbase, r12_heapbase);
6045 } else {
6046 mov64(r12_heapbase, (int64_t)CompressedOops::ptrs_base());
6047 }
6048 } else {
6049 movptr(r12_heapbase, ExternalAddress(CompressedOops::ptrs_base_addr()));
6050 }
6051 }
6052 }
6053
6054 #endif // _LP64
6055
6056 #if COMPILER2_OR_JVMCI
6057
6058 // clear memory of size 'cnt' qwords, starting at 'base' using XMM/YMM/ZMM registers
6059 void MacroAssembler::xmm_clear_mem(Register base, Register cnt, Register rtmp, XMMRegister xtmp, KRegister mask) {
6060 // cnt - number of qwords (8-byte words).
6061 // base - start address, qword aligned.
6062 Label L_zero_64_bytes, L_loop, L_sloop, L_tail, L_end;
6063 bool use64byteVector = (MaxVectorSize == 64) && (VM_Version::avx3_threshold() == 0);
6064 if (use64byteVector) {
6065 vpxor(xtmp, xtmp, xtmp, AVX_512bit);
6066 } else if (MaxVectorSize >= 32) {
6067 vpxor(xtmp, xtmp, xtmp, AVX_256bit);
6068 } else {
6069 pxor(xtmp, xtmp);
6070 }
6071 jmp(L_zero_64_bytes);
6072
6073 BIND(L_loop);
6074 if (MaxVectorSize >= 32) {
6075 fill64(base, 0, xtmp, use64byteVector);
6076 } else {
6077 movdqu(Address(base, 0), xtmp);
6078 movdqu(Address(base, 16), xtmp);
6079 movdqu(Address(base, 32), xtmp);
6080 movdqu(Address(base, 48), xtmp);
6081 }
6082 addptr(base, 64);
6083
6084 BIND(L_zero_64_bytes);
6085 subptr(cnt, 8);
6086 jccb(Assembler::greaterEqual, L_loop);
6087
6088 // Copy trailing 64 bytes
6089 if (use64byteVector) {
6090 addptr(cnt, 8);
6091 jccb(Assembler::equal, L_end);
6092 fill64_masked(3, base, 0, xtmp, mask, cnt, rtmp, true);
6093 jmp(L_end);
6094 } else {
6095 addptr(cnt, 4);
6096 jccb(Assembler::less, L_tail);
6097 if (MaxVectorSize >= 32) {
6098 vmovdqu(Address(base, 0), xtmp);
6099 } else {
6100 movdqu(Address(base, 0), xtmp);
6101 movdqu(Address(base, 16), xtmp);
6102 }
6103 }
6104 addptr(base, 32);
6105 subptr(cnt, 4);
6106
6107 BIND(L_tail);
6108 addptr(cnt, 4);
6109 jccb(Assembler::lessEqual, L_end);
6110 if (UseAVX > 2 && MaxVectorSize >= 32 && VM_Version::supports_avx512vl()) {
6111 fill32_masked(3, base, 0, xtmp, mask, cnt, rtmp);
6112 } else {
6113 decrement(cnt);
6114
6115 BIND(L_sloop);
6116 movq(Address(base, 0), xtmp);
6117 addptr(base, 8);
6118 decrement(cnt);
6119 jccb(Assembler::greaterEqual, L_sloop);
6120 }
6121 BIND(L_end);
6122 }
6123
6124 // Clearing constant sized memory using YMM/ZMM registers.
6125 void MacroAssembler::clear_mem(Register base, int cnt, Register rtmp, XMMRegister xtmp, KRegister mask) {
6126 assert(UseAVX > 2 && VM_Version::supports_avx512vl(), "");
6127 bool use64byteVector = (MaxVectorSize > 32) && (VM_Version::avx3_threshold() == 0);
6128
6129 int vector64_count = (cnt & (~0x7)) >> 3;
6130 cnt = cnt & 0x7;
6131 const int fill64_per_loop = 4;
6132 const int max_unrolled_fill64 = 8;
6133
6134 // 64 byte initialization loop.
6135 vpxor(xtmp, xtmp, xtmp, use64byteVector ? AVX_512bit : AVX_256bit);
6136 int start64 = 0;
6137 if (vector64_count > max_unrolled_fill64) {
6138 Label LOOP;
6139 Register index = rtmp;
6140
6141 start64 = vector64_count - (vector64_count % fill64_per_loop);
6142
6143 movl(index, 0);
6144 BIND(LOOP);
6145 for (int i = 0; i < fill64_per_loop; i++) {
6146 fill64(Address(base, index, Address::times_1, i * 64), xtmp, use64byteVector);
6147 }
6148 addl(index, fill64_per_loop * 64);
6149 cmpl(index, start64 * 64);
6150 jccb(Assembler::less, LOOP);
6151 }
6152 for (int i = start64; i < vector64_count; i++) {
6153 fill64(base, i * 64, xtmp, use64byteVector);
6154 }
6155
6156 // Clear remaining 64 byte tail.
6157 int disp = vector64_count * 64;
6158 if (cnt) {
6159 switch (cnt) {
6160 case 1:
6161 movq(Address(base, disp), xtmp);
6162 break;
6163 case 2:
6164 evmovdqu(T_LONG, k0, Address(base, disp), xtmp, false, Assembler::AVX_128bit);
6165 break;
6166 case 3:
6167 movl(rtmp, 0x7);
6168 kmovwl(mask, rtmp);
6169 evmovdqu(T_LONG, mask, Address(base, disp), xtmp, true, Assembler::AVX_256bit);
6170 break;
6171 case 4:
6172 evmovdqu(T_LONG, k0, Address(base, disp), xtmp, false, Assembler::AVX_256bit);
6173 break;
6174 case 5:
6175 if (use64byteVector) {
6176 movl(rtmp, 0x1F);
6177 kmovwl(mask, rtmp);
6178 evmovdqu(T_LONG, mask, Address(base, disp), xtmp, true, Assembler::AVX_512bit);
6179 } else {
6180 evmovdqu(T_LONG, k0, Address(base, disp), xtmp, false, Assembler::AVX_256bit);
6181 movq(Address(base, disp + 32), xtmp);
6182 }
6183 break;
6184 case 6:
6185 if (use64byteVector) {
6186 movl(rtmp, 0x3F);
6187 kmovwl(mask, rtmp);
6188 evmovdqu(T_LONG, mask, Address(base, disp), xtmp, true, Assembler::AVX_512bit);
6189 } else {
6190 evmovdqu(T_LONG, k0, Address(base, disp), xtmp, false, Assembler::AVX_256bit);
6191 evmovdqu(T_LONG, k0, Address(base, disp + 32), xtmp, false, Assembler::AVX_128bit);
6192 }
6193 break;
6194 case 7:
6195 if (use64byteVector) {
6196 movl(rtmp, 0x7F);
6197 kmovwl(mask, rtmp);
6198 evmovdqu(T_LONG, mask, Address(base, disp), xtmp, true, Assembler::AVX_512bit);
6199 } else {
6200 evmovdqu(T_LONG, k0, Address(base, disp), xtmp, false, Assembler::AVX_256bit);
6201 movl(rtmp, 0x7);
6202 kmovwl(mask, rtmp);
6203 evmovdqu(T_LONG, mask, Address(base, disp + 32), xtmp, true, Assembler::AVX_256bit);
6204 }
6205 break;
6206 default:
6207 fatal("Unexpected length : %d\n",cnt);
6208 break;
6209 }
6210 }
6211 }
6212
6213 void MacroAssembler::clear_mem(Register base, Register cnt, Register tmp, XMMRegister xtmp,
6214 bool is_large, KRegister mask) {
6215 // cnt - number of qwords (8-byte words).
6216 // base - start address, qword aligned.
6217 // is_large - if optimizers know cnt is larger than InitArrayShortSize
6218 assert(base==rdi, "base register must be edi for rep stos");
6219 assert(tmp==rax, "tmp register must be eax for rep stos");
6220 assert(cnt==rcx, "cnt register must be ecx for rep stos");
6221 assert(InitArrayShortSize % BytesPerLong == 0,
6222 "InitArrayShortSize should be the multiple of BytesPerLong");
6223
6224 Label DONE;
6225 if (!is_large || !UseXMMForObjInit) {
6226 xorptr(tmp, tmp);
6227 }
6228
6229 if (!is_large) {
6230 Label LOOP, LONG;
6231 cmpptr(cnt, InitArrayShortSize/BytesPerLong);
6232 jccb(Assembler::greater, LONG);
6233
6234 NOT_LP64(shlptr(cnt, 1);) // convert to number of 32-bit words for 32-bit VM
6235
6236 decrement(cnt);
6237 jccb(Assembler::negative, DONE); // Zero length
6238
6239 // Use individual pointer-sized stores for small counts:
6240 BIND(LOOP);
6241 movptr(Address(base, cnt, Address::times_ptr), tmp);
6242 decrement(cnt);
6243 jccb(Assembler::greaterEqual, LOOP);
6244 jmpb(DONE);
6245
6246 BIND(LONG);
6247 }
6248
6249 // Use longer rep-prefixed ops for non-small counts:
6250 if (UseFastStosb) {
6251 shlptr(cnt, 3); // convert to number of bytes
6252 rep_stosb();
6253 } else if (UseXMMForObjInit) {
6254 xmm_clear_mem(base, cnt, tmp, xtmp, mask);
6255 } else {
6256 NOT_LP64(shlptr(cnt, 1);) // convert to number of 32-bit words for 32-bit VM
6257 rep_stos();
6258 }
6259
6260 BIND(DONE);
6261 }
6262
6263 #endif //COMPILER2_OR_JVMCI
6264
6265
6266 void MacroAssembler::generate_fill(BasicType t, bool aligned,
6267 Register to, Register value, Register count,
6268 Register rtmp, XMMRegister xtmp) {
6269 ShortBranchVerifier sbv(this);
6270 assert_different_registers(to, value, count, rtmp);
6271 Label L_exit;
6272 Label L_fill_2_bytes, L_fill_4_bytes;
6273
6274 #if defined(COMPILER2) && defined(_LP64)
6275 if(MaxVectorSize >=32 &&
6276 VM_Version::supports_avx512vlbw() &&
6277 VM_Version::supports_bmi2()) {
6278 generate_fill_avx3(t, to, value, count, rtmp, xtmp);
6279 return;
6280 }
6281 #endif
6282
6283 int shift = -1;
6284 switch (t) {
6285 case T_BYTE:
6286 shift = 2;
6287 break;
6288 case T_SHORT:
6289 shift = 1;
6290 break;
6291 case T_INT:
6292 shift = 0;
6293 break;
6294 default: ShouldNotReachHere();
6295 }
6296
6297 if (t == T_BYTE) {
6298 andl(value, 0xff);
6299 movl(rtmp, value);
6300 shll(rtmp, 8);
6301 orl(value, rtmp);
6302 }
6303 if (t == T_SHORT) {
6304 andl(value, 0xffff);
6305 }
6306 if (t == T_BYTE || t == T_SHORT) {
6307 movl(rtmp, value);
6308 shll(rtmp, 16);
6309 orl(value, rtmp);
6310 }
6311
6312 cmpptr(count, 2<<shift); // Short arrays (< 8 bytes) fill by element
6313 jcc(Assembler::below, L_fill_4_bytes); // use unsigned cmp
6314 if (!UseUnalignedLoadStores && !aligned && (t == T_BYTE || t == T_SHORT)) {
6315 Label L_skip_align2;
6316 // align source address at 4 bytes address boundary
6317 if (t == T_BYTE) {
6318 Label L_skip_align1;
6319 // One byte misalignment happens only for byte arrays
6320 testptr(to, 1);
6321 jccb(Assembler::zero, L_skip_align1);
6322 movb(Address(to, 0), value);
6323 increment(to);
6324 decrement(count);
6325 BIND(L_skip_align1);
6326 }
6327 // Two bytes misalignment happens only for byte and short (char) arrays
6328 testptr(to, 2);
6329 jccb(Assembler::zero, L_skip_align2);
6330 movw(Address(to, 0), value);
6331 addptr(to, 2);
6332 subptr(count, 1<<(shift-1));
6333 BIND(L_skip_align2);
6334 }
6335 if (UseSSE < 2) {
6336 Label L_fill_32_bytes_loop, L_check_fill_8_bytes, L_fill_8_bytes_loop, L_fill_8_bytes;
6337 // Fill 32-byte chunks
6338 subptr(count, 8 << shift);
6339 jcc(Assembler::less, L_check_fill_8_bytes);
6340 align(16);
6341
6342 BIND(L_fill_32_bytes_loop);
6343
6344 for (int i = 0; i < 32; i += 4) {
6345 movl(Address(to, i), value);
6346 }
6347
6348 addptr(to, 32);
6349 subptr(count, 8 << shift);
6350 jcc(Assembler::greaterEqual, L_fill_32_bytes_loop);
6351 BIND(L_check_fill_8_bytes);
6352 addptr(count, 8 << shift);
6353 jccb(Assembler::zero, L_exit);
6354 jmpb(L_fill_8_bytes);
6355
6356 //
6357 // length is too short, just fill qwords
6358 //
6359 BIND(L_fill_8_bytes_loop);
6360 movl(Address(to, 0), value);
6361 movl(Address(to, 4), value);
6362 addptr(to, 8);
6363 BIND(L_fill_8_bytes);
6364 subptr(count, 1 << (shift + 1));
6365 jcc(Assembler::greaterEqual, L_fill_8_bytes_loop);
6366 // fall through to fill 4 bytes
6367 } else {
6368 Label L_fill_32_bytes;
6369 if (!UseUnalignedLoadStores) {
6370 // align to 8 bytes, we know we are 4 byte aligned to start
6371 testptr(to, 4);
6372 jccb(Assembler::zero, L_fill_32_bytes);
6373 movl(Address(to, 0), value);
6374 addptr(to, 4);
6375 subptr(count, 1<<shift);
6376 }
6377 BIND(L_fill_32_bytes);
6378 {
6379 assert( UseSSE >= 2, "supported cpu only" );
6380 Label L_fill_32_bytes_loop, L_check_fill_8_bytes, L_fill_8_bytes_loop, L_fill_8_bytes;
6381 movdl(xtmp, value);
6382 if (UseAVX >= 2 && UseUnalignedLoadStores) {
6383 Label L_check_fill_32_bytes;
6384 if (UseAVX > 2) {
6385 // Fill 64-byte chunks
6386 Label L_fill_64_bytes_loop_avx3, L_check_fill_64_bytes_avx2;
6387
6388 // If number of bytes to fill < VM_Version::avx3_threshold(), perform fill using AVX2
6389 cmpptr(count, VM_Version::avx3_threshold());
6390 jccb(Assembler::below, L_check_fill_64_bytes_avx2);
6391
6392 vpbroadcastd(xtmp, xtmp, Assembler::AVX_512bit);
6393
6394 subptr(count, 16 << shift);
6395 jccb(Assembler::less, L_check_fill_32_bytes);
6396 align(16);
6397
6398 BIND(L_fill_64_bytes_loop_avx3);
6399 evmovdqul(Address(to, 0), xtmp, Assembler::AVX_512bit);
6400 addptr(to, 64);
6401 subptr(count, 16 << shift);
6402 jcc(Assembler::greaterEqual, L_fill_64_bytes_loop_avx3);
6403 jmpb(L_check_fill_32_bytes);
6404
6405 BIND(L_check_fill_64_bytes_avx2);
6406 }
6407 // Fill 64-byte chunks
6408 Label L_fill_64_bytes_loop;
6409 vpbroadcastd(xtmp, xtmp, Assembler::AVX_256bit);
6410
6411 subptr(count, 16 << shift);
6412 jcc(Assembler::less, L_check_fill_32_bytes);
6413 align(16);
6414
6415 BIND(L_fill_64_bytes_loop);
6416 vmovdqu(Address(to, 0), xtmp);
6417 vmovdqu(Address(to, 32), xtmp);
6418 addptr(to, 64);
6419 subptr(count, 16 << shift);
6420 jcc(Assembler::greaterEqual, L_fill_64_bytes_loop);
6421
6422 BIND(L_check_fill_32_bytes);
6423 addptr(count, 8 << shift);
6424 jccb(Assembler::less, L_check_fill_8_bytes);
6425 vmovdqu(Address(to, 0), xtmp);
6426 addptr(to, 32);
6427 subptr(count, 8 << shift);
6428
6429 BIND(L_check_fill_8_bytes);
6430 // clean upper bits of YMM registers
6431 movdl(xtmp, value);
6432 pshufd(xtmp, xtmp, 0);
6433 } else {
6434 // Fill 32-byte chunks
6435 pshufd(xtmp, xtmp, 0);
6436
6437 subptr(count, 8 << shift);
6438 jcc(Assembler::less, L_check_fill_8_bytes);
6439 align(16);
6440
6441 BIND(L_fill_32_bytes_loop);
6442
6443 if (UseUnalignedLoadStores) {
6444 movdqu(Address(to, 0), xtmp);
6445 movdqu(Address(to, 16), xtmp);
6446 } else {
6447 movq(Address(to, 0), xtmp);
6448 movq(Address(to, 8), xtmp);
6449 movq(Address(to, 16), xtmp);
6450 movq(Address(to, 24), xtmp);
6451 }
6452
6453 addptr(to, 32);
6454 subptr(count, 8 << shift);
6455 jcc(Assembler::greaterEqual, L_fill_32_bytes_loop);
6456
6457 BIND(L_check_fill_8_bytes);
6458 }
6459 addptr(count, 8 << shift);
6460 jccb(Assembler::zero, L_exit);
6461 jmpb(L_fill_8_bytes);
6462
6463 //
6464 // length is too short, just fill qwords
6465 //
6466 BIND(L_fill_8_bytes_loop);
6467 movq(Address(to, 0), xtmp);
6468 addptr(to, 8);
6469 BIND(L_fill_8_bytes);
6470 subptr(count, 1 << (shift + 1));
6471 jcc(Assembler::greaterEqual, L_fill_8_bytes_loop);
6472 }
6473 }
6474 // fill trailing 4 bytes
6475 BIND(L_fill_4_bytes);
6476 testl(count, 1<<shift);
6477 jccb(Assembler::zero, L_fill_2_bytes);
6478 movl(Address(to, 0), value);
6479 if (t == T_BYTE || t == T_SHORT) {
6480 Label L_fill_byte;
6481 addptr(to, 4);
6482 BIND(L_fill_2_bytes);
6483 // fill trailing 2 bytes
6484 testl(count, 1<<(shift-1));
6485 jccb(Assembler::zero, L_fill_byte);
6486 movw(Address(to, 0), value);
6487 if (t == T_BYTE) {
6488 addptr(to, 2);
6489 BIND(L_fill_byte);
6490 // fill trailing byte
6491 testl(count, 1);
6492 jccb(Assembler::zero, L_exit);
6493 movb(Address(to, 0), value);
6494 } else {
6495 BIND(L_fill_byte);
6496 }
6497 } else {
6498 BIND(L_fill_2_bytes);
6499 }
6500 BIND(L_exit);
6501 }
6502
6503 void MacroAssembler::evpbroadcast(BasicType type, XMMRegister dst, Register src, int vector_len) {
6504 switch(type) {
6505 case T_BYTE:
6506 case T_BOOLEAN:
6507 evpbroadcastb(dst, src, vector_len);
6508 break;
6509 case T_SHORT:
6510 case T_CHAR:
6511 evpbroadcastw(dst, src, vector_len);
6512 break;
6513 case T_INT:
6514 case T_FLOAT:
6515 evpbroadcastd(dst, src, vector_len);
6516 break;
6517 case T_LONG:
6518 case T_DOUBLE:
6519 evpbroadcastq(dst, src, vector_len);
6520 break;
6521 default:
6522 fatal("Unhandled type : %s", type2name(type));
6523 break;
6524 }
6525 }
6526
6527 // encode char[] to byte[] in ISO_8859_1 or ASCII
6528 //@IntrinsicCandidate
6529 //private static int implEncodeISOArray(byte[] sa, int sp,
6530 //byte[] da, int dp, int len) {
6531 // int i = 0;
6532 // for (; i < len; i++) {
6533 // char c = StringUTF16.getChar(sa, sp++);
6534 // if (c > '\u00FF')
6535 // break;
6536 // da[dp++] = (byte)c;
6537 // }
6538 // return i;
6539 //}
6540 //
6541 //@IntrinsicCandidate
6542 //private static int implEncodeAsciiArray(char[] sa, int sp,
6543 // byte[] da, int dp, int len) {
6544 // int i = 0;
6545 // for (; i < len; i++) {
6546 // char c = sa[sp++];
6547 // if (c >= '\u0080')
6548 // break;
6549 // da[dp++] = (byte)c;
6550 // }
6551 // return i;
6552 //}
6553 void MacroAssembler::encode_iso_array(Register src, Register dst, Register len,
6554 XMMRegister tmp1Reg, XMMRegister tmp2Reg,
6555 XMMRegister tmp3Reg, XMMRegister tmp4Reg,
6556 Register tmp5, Register result, bool ascii) {
6557
6558 // rsi: src
6559 // rdi: dst
6560 // rdx: len
6561 // rcx: tmp5
6562 // rax: result
6563 ShortBranchVerifier sbv(this);
6564 assert_different_registers(src, dst, len, tmp5, result);
6565 Label L_done, L_copy_1_char, L_copy_1_char_exit;
6566
6567 int mask = ascii ? 0xff80ff80 : 0xff00ff00;
6568 int short_mask = ascii ? 0xff80 : 0xff00;
6569
6570 // set result
6571 xorl(result, result);
6572 // check for zero length
6573 testl(len, len);
6574 jcc(Assembler::zero, L_done);
6575
6576 movl(result, len);
6577
6578 // Setup pointers
6579 lea(src, Address(src, len, Address::times_2)); // char[]
6580 lea(dst, Address(dst, len, Address::times_1)); // byte[]
6581 negptr(len);
6582
6583 if (UseSSE42Intrinsics || UseAVX >= 2) {
6584 Label L_copy_8_chars, L_copy_8_chars_exit;
6585 Label L_chars_16_check, L_copy_16_chars, L_copy_16_chars_exit;
6586
6587 if (UseAVX >= 2) {
6588 Label L_chars_32_check, L_copy_32_chars, L_copy_32_chars_exit;
6589 movl(tmp5, mask); // create mask to test for Unicode or non-ASCII chars in vector
6590 movdl(tmp1Reg, tmp5);
6591 vpbroadcastd(tmp1Reg, tmp1Reg, Assembler::AVX_256bit);
6592 jmp(L_chars_32_check);
6593
6594 bind(L_copy_32_chars);
6595 vmovdqu(tmp3Reg, Address(src, len, Address::times_2, -64));
6596 vmovdqu(tmp4Reg, Address(src, len, Address::times_2, -32));
6597 vpor(tmp2Reg, tmp3Reg, tmp4Reg, /* vector_len */ 1);
6598 vptest(tmp2Reg, tmp1Reg); // check for Unicode or non-ASCII chars in vector
6599 jccb(Assembler::notZero, L_copy_32_chars_exit);
6600 vpackuswb(tmp3Reg, tmp3Reg, tmp4Reg, /* vector_len */ 1);
6601 vpermq(tmp4Reg, tmp3Reg, 0xD8, /* vector_len */ 1);
6602 vmovdqu(Address(dst, len, Address::times_1, -32), tmp4Reg);
6603
6604 bind(L_chars_32_check);
6605 addptr(len, 32);
6606 jcc(Assembler::lessEqual, L_copy_32_chars);
6607
6608 bind(L_copy_32_chars_exit);
6609 subptr(len, 16);
6610 jccb(Assembler::greater, L_copy_16_chars_exit);
6611
6612 } else if (UseSSE42Intrinsics) {
6613 movl(tmp5, mask); // create mask to test for Unicode or non-ASCII chars in vector
6614 movdl(tmp1Reg, tmp5);
6615 pshufd(tmp1Reg, tmp1Reg, 0);
6616 jmpb(L_chars_16_check);
6617 }
6618
6619 bind(L_copy_16_chars);
6620 if (UseAVX >= 2) {
6621 vmovdqu(tmp2Reg, Address(src, len, Address::times_2, -32));
6622 vptest(tmp2Reg, tmp1Reg);
6623 jcc(Assembler::notZero, L_copy_16_chars_exit);
6624 vpackuswb(tmp2Reg, tmp2Reg, tmp1Reg, /* vector_len */ 1);
6625 vpermq(tmp3Reg, tmp2Reg, 0xD8, /* vector_len */ 1);
6626 } else {
6627 if (UseAVX > 0) {
6628 movdqu(tmp3Reg, Address(src, len, Address::times_2, -32));
6629 movdqu(tmp4Reg, Address(src, len, Address::times_2, -16));
6630 vpor(tmp2Reg, tmp3Reg, tmp4Reg, /* vector_len */ 0);
6631 } else {
6632 movdqu(tmp3Reg, Address(src, len, Address::times_2, -32));
6633 por(tmp2Reg, tmp3Reg);
6634 movdqu(tmp4Reg, Address(src, len, Address::times_2, -16));
6635 por(tmp2Reg, tmp4Reg);
6636 }
6637 ptest(tmp2Reg, tmp1Reg); // check for Unicode or non-ASCII chars in vector
6638 jccb(Assembler::notZero, L_copy_16_chars_exit);
6639 packuswb(tmp3Reg, tmp4Reg);
6640 }
6641 movdqu(Address(dst, len, Address::times_1, -16), tmp3Reg);
6642
6643 bind(L_chars_16_check);
6644 addptr(len, 16);
6645 jcc(Assembler::lessEqual, L_copy_16_chars);
6646
6647 bind(L_copy_16_chars_exit);
6648 if (UseAVX >= 2) {
6649 // clean upper bits of YMM registers
6650 vpxor(tmp2Reg, tmp2Reg);
6651 vpxor(tmp3Reg, tmp3Reg);
6652 vpxor(tmp4Reg, tmp4Reg);
6653 movdl(tmp1Reg, tmp5);
6654 pshufd(tmp1Reg, tmp1Reg, 0);
6655 }
6656 subptr(len, 8);
6657 jccb(Assembler::greater, L_copy_8_chars_exit);
6658
6659 bind(L_copy_8_chars);
6660 movdqu(tmp3Reg, Address(src, len, Address::times_2, -16));
6661 ptest(tmp3Reg, tmp1Reg);
6662 jccb(Assembler::notZero, L_copy_8_chars_exit);
6663 packuswb(tmp3Reg, tmp1Reg);
6664 movq(Address(dst, len, Address::times_1, -8), tmp3Reg);
6665 addptr(len, 8);
6666 jccb(Assembler::lessEqual, L_copy_8_chars);
6667
6668 bind(L_copy_8_chars_exit);
6669 subptr(len, 8);
6670 jccb(Assembler::zero, L_done);
6671 }
6672
6673 bind(L_copy_1_char);
6674 load_unsigned_short(tmp5, Address(src, len, Address::times_2, 0));
6675 testl(tmp5, short_mask); // check if Unicode or non-ASCII char
6676 jccb(Assembler::notZero, L_copy_1_char_exit);
6677 movb(Address(dst, len, Address::times_1, 0), tmp5);
6678 addptr(len, 1);
6679 jccb(Assembler::less, L_copy_1_char);
6680
6681 bind(L_copy_1_char_exit);
6682 addptr(result, len); // len is negative count of not processed elements
6683
6684 bind(L_done);
6685 }
6686
6687 #ifdef _LP64
6688 /**
6689 * Helper for multiply_to_len().
6690 */
6691 void MacroAssembler::add2_with_carry(Register dest_hi, Register dest_lo, Register src1, Register src2) {
6692 addq(dest_lo, src1);
6693 adcq(dest_hi, 0);
6694 addq(dest_lo, src2);
6695 adcq(dest_hi, 0);
6696 }
6697
6698 /**
6699 * Multiply 64 bit by 64 bit first loop.
6700 */
6701 void MacroAssembler::multiply_64_x_64_loop(Register x, Register xstart, Register x_xstart,
6702 Register y, Register y_idx, Register z,
6703 Register carry, Register product,
6704 Register idx, Register kdx) {
6705 //
6706 // jlong carry, x[], y[], z[];
6707 // for (int idx=ystart, kdx=ystart+1+xstart; idx >= 0; idx-, kdx--) {
6708 // huge_128 product = y[idx] * x[xstart] + carry;
6709 // z[kdx] = (jlong)product;
6710 // carry = (jlong)(product >>> 64);
6711 // }
6712 // z[xstart] = carry;
6713 //
6714
6715 Label L_first_loop, L_first_loop_exit;
6716 Label L_one_x, L_one_y, L_multiply;
6717
6718 decrementl(xstart);
6719 jcc(Assembler::negative, L_one_x);
6720
6721 movq(x_xstart, Address(x, xstart, Address::times_4, 0));
6722 rorq(x_xstart, 32); // convert big-endian to little-endian
6723
6724 bind(L_first_loop);
6725 decrementl(idx);
6726 jcc(Assembler::negative, L_first_loop_exit);
6727 decrementl(idx);
6728 jcc(Assembler::negative, L_one_y);
6729 movq(y_idx, Address(y, idx, Address::times_4, 0));
6730 rorq(y_idx, 32); // convert big-endian to little-endian
6731 bind(L_multiply);
6732 movq(product, x_xstart);
6733 mulq(y_idx); // product(rax) * y_idx -> rdx:rax
6734 addq(product, carry);
6735 adcq(rdx, 0);
6736 subl(kdx, 2);
6737 movl(Address(z, kdx, Address::times_4, 4), product);
6738 shrq(product, 32);
6739 movl(Address(z, kdx, Address::times_4, 0), product);
6740 movq(carry, rdx);
6741 jmp(L_first_loop);
6742
6743 bind(L_one_y);
6744 movl(y_idx, Address(y, 0));
6745 jmp(L_multiply);
6746
6747 bind(L_one_x);
6748 movl(x_xstart, Address(x, 0));
6749 jmp(L_first_loop);
6750
6751 bind(L_first_loop_exit);
6752 }
6753
6754 /**
6755 * Multiply 64 bit by 64 bit and add 128 bit.
6756 */
6757 void MacroAssembler::multiply_add_128_x_128(Register x_xstart, Register y, Register z,
6758 Register yz_idx, Register idx,
6759 Register carry, Register product, int offset) {
6760 // huge_128 product = (y[idx] * x_xstart) + z[kdx] + carry;
6761 // z[kdx] = (jlong)product;
6762
6763 movq(yz_idx, Address(y, idx, Address::times_4, offset));
6764 rorq(yz_idx, 32); // convert big-endian to little-endian
6765 movq(product, x_xstart);
6766 mulq(yz_idx); // product(rax) * yz_idx -> rdx:product(rax)
6767 movq(yz_idx, Address(z, idx, Address::times_4, offset));
6768 rorq(yz_idx, 32); // convert big-endian to little-endian
6769
6770 add2_with_carry(rdx, product, carry, yz_idx);
6771
6772 movl(Address(z, idx, Address::times_4, offset+4), product);
6773 shrq(product, 32);
6774 movl(Address(z, idx, Address::times_4, offset), product);
6775
6776 }
6777
6778 /**
6779 * Multiply 128 bit by 128 bit. Unrolled inner loop.
6780 */
6781 void MacroAssembler::multiply_128_x_128_loop(Register x_xstart, Register y, Register z,
6782 Register yz_idx, Register idx, Register jdx,
6783 Register carry, Register product,
6784 Register carry2) {
6785 // jlong carry, x[], y[], z[];
6786 // int kdx = ystart+1;
6787 // for (int idx=ystart-2; idx >= 0; idx -= 2) { // Third loop
6788 // huge_128 product = (y[idx+1] * x_xstart) + z[kdx+idx+1] + carry;
6789 // z[kdx+idx+1] = (jlong)product;
6790 // jlong carry2 = (jlong)(product >>> 64);
6791 // product = (y[idx] * x_xstart) + z[kdx+idx] + carry2;
6792 // z[kdx+idx] = (jlong)product;
6793 // carry = (jlong)(product >>> 64);
6794 // }
6795 // idx += 2;
6796 // if (idx > 0) {
6797 // product = (y[idx] * x_xstart) + z[kdx+idx] + carry;
6798 // z[kdx+idx] = (jlong)product;
6799 // carry = (jlong)(product >>> 64);
6800 // }
6801 //
6802
6803 Label L_third_loop, L_third_loop_exit, L_post_third_loop_done;
6804
6805 movl(jdx, idx);
6806 andl(jdx, 0xFFFFFFFC);
6807 shrl(jdx, 2);
6808
6809 bind(L_third_loop);
6810 subl(jdx, 1);
6811 jcc(Assembler::negative, L_third_loop_exit);
6812 subl(idx, 4);
6813
6814 multiply_add_128_x_128(x_xstart, y, z, yz_idx, idx, carry, product, 8);
6815 movq(carry2, rdx);
6816
6817 multiply_add_128_x_128(x_xstart, y, z, yz_idx, idx, carry2, product, 0);
6818 movq(carry, rdx);
6819 jmp(L_third_loop);
6820
6821 bind (L_third_loop_exit);
6822
6823 andl (idx, 0x3);
6824 jcc(Assembler::zero, L_post_third_loop_done);
6825
6826 Label L_check_1;
6827 subl(idx, 2);
6828 jcc(Assembler::negative, L_check_1);
6829
6830 multiply_add_128_x_128(x_xstart, y, z, yz_idx, idx, carry, product, 0);
6831 movq(carry, rdx);
6832
6833 bind (L_check_1);
6834 addl (idx, 0x2);
6835 andl (idx, 0x1);
6836 subl(idx, 1);
6837 jcc(Assembler::negative, L_post_third_loop_done);
6838
6839 movl(yz_idx, Address(y, idx, Address::times_4, 0));
6840 movq(product, x_xstart);
6841 mulq(yz_idx); // product(rax) * yz_idx -> rdx:product(rax)
6842 movl(yz_idx, Address(z, idx, Address::times_4, 0));
6843
6844 add2_with_carry(rdx, product, yz_idx, carry);
6845
6846 movl(Address(z, idx, Address::times_4, 0), product);
6847 shrq(product, 32);
6848
6849 shlq(rdx, 32);
6850 orq(product, rdx);
6851 movq(carry, product);
6852
6853 bind(L_post_third_loop_done);
6854 }
6855
6856 /**
6857 * Multiply 128 bit by 128 bit using BMI2. Unrolled inner loop.
6858 *
6859 */
6860 void MacroAssembler::multiply_128_x_128_bmi2_loop(Register y, Register z,
6861 Register carry, Register carry2,
6862 Register idx, Register jdx,
6863 Register yz_idx1, Register yz_idx2,
6864 Register tmp, Register tmp3, Register tmp4) {
6865 assert(UseBMI2Instructions, "should be used only when BMI2 is available");
6866
6867 // jlong carry, x[], y[], z[];
6868 // int kdx = ystart+1;
6869 // for (int idx=ystart-2; idx >= 0; idx -= 2) { // Third loop
6870 // huge_128 tmp3 = (y[idx+1] * rdx) + z[kdx+idx+1] + carry;
6871 // jlong carry2 = (jlong)(tmp3 >>> 64);
6872 // huge_128 tmp4 = (y[idx] * rdx) + z[kdx+idx] + carry2;
6873 // carry = (jlong)(tmp4 >>> 64);
6874 // z[kdx+idx+1] = (jlong)tmp3;
6875 // z[kdx+idx] = (jlong)tmp4;
6876 // }
6877 // idx += 2;
6878 // if (idx > 0) {
6879 // yz_idx1 = (y[idx] * rdx) + z[kdx+idx] + carry;
6880 // z[kdx+idx] = (jlong)yz_idx1;
6881 // carry = (jlong)(yz_idx1 >>> 64);
6882 // }
6883 //
6884
6885 Label L_third_loop, L_third_loop_exit, L_post_third_loop_done;
6886
6887 movl(jdx, idx);
6888 andl(jdx, 0xFFFFFFFC);
6889 shrl(jdx, 2);
6890
6891 bind(L_third_loop);
6892 subl(jdx, 1);
6893 jcc(Assembler::negative, L_third_loop_exit);
6894 subl(idx, 4);
6895
6896 movq(yz_idx1, Address(y, idx, Address::times_4, 8));
6897 rorxq(yz_idx1, yz_idx1, 32); // convert big-endian to little-endian
6898 movq(yz_idx2, Address(y, idx, Address::times_4, 0));
6899 rorxq(yz_idx2, yz_idx2, 32);
6900
6901 mulxq(tmp4, tmp3, yz_idx1); // yz_idx1 * rdx -> tmp4:tmp3
6902 mulxq(carry2, tmp, yz_idx2); // yz_idx2 * rdx -> carry2:tmp
6903
6904 movq(yz_idx1, Address(z, idx, Address::times_4, 8));
6905 rorxq(yz_idx1, yz_idx1, 32);
6906 movq(yz_idx2, Address(z, idx, Address::times_4, 0));
6907 rorxq(yz_idx2, yz_idx2, 32);
6908
6909 if (VM_Version::supports_adx()) {
6910 adcxq(tmp3, carry);
6911 adoxq(tmp3, yz_idx1);
6912
6913 adcxq(tmp4, tmp);
6914 adoxq(tmp4, yz_idx2);
6915
6916 movl(carry, 0); // does not affect flags
6917 adcxq(carry2, carry);
6918 adoxq(carry2, carry);
6919 } else {
6920 add2_with_carry(tmp4, tmp3, carry, yz_idx1);
6921 add2_with_carry(carry2, tmp4, tmp, yz_idx2);
6922 }
6923 movq(carry, carry2);
6924
6925 movl(Address(z, idx, Address::times_4, 12), tmp3);
6926 shrq(tmp3, 32);
6927 movl(Address(z, idx, Address::times_4, 8), tmp3);
6928
6929 movl(Address(z, idx, Address::times_4, 4), tmp4);
6930 shrq(tmp4, 32);
6931 movl(Address(z, idx, Address::times_4, 0), tmp4);
6932
6933 jmp(L_third_loop);
6934
6935 bind (L_third_loop_exit);
6936
6937 andl (idx, 0x3);
6938 jcc(Assembler::zero, L_post_third_loop_done);
6939
6940 Label L_check_1;
6941 subl(idx, 2);
6942 jcc(Assembler::negative, L_check_1);
6943
6944 movq(yz_idx1, Address(y, idx, Address::times_4, 0));
6945 rorxq(yz_idx1, yz_idx1, 32);
6946 mulxq(tmp4, tmp3, yz_idx1); // yz_idx1 * rdx -> tmp4:tmp3
6947 movq(yz_idx2, Address(z, idx, Address::times_4, 0));
6948 rorxq(yz_idx2, yz_idx2, 32);
6949
6950 add2_with_carry(tmp4, tmp3, carry, yz_idx2);
6951
6952 movl(Address(z, idx, Address::times_4, 4), tmp3);
6953 shrq(tmp3, 32);
6954 movl(Address(z, idx, Address::times_4, 0), tmp3);
6955 movq(carry, tmp4);
6956
6957 bind (L_check_1);
6958 addl (idx, 0x2);
6959 andl (idx, 0x1);
6960 subl(idx, 1);
6961 jcc(Assembler::negative, L_post_third_loop_done);
6962 movl(tmp4, Address(y, idx, Address::times_4, 0));
6963 mulxq(carry2, tmp3, tmp4); // tmp4 * rdx -> carry2:tmp3
6964 movl(tmp4, Address(z, idx, Address::times_4, 0));
6965
6966 add2_with_carry(carry2, tmp3, tmp4, carry);
6967
6968 movl(Address(z, idx, Address::times_4, 0), tmp3);
6969 shrq(tmp3, 32);
6970
6971 shlq(carry2, 32);
6972 orq(tmp3, carry2);
6973 movq(carry, tmp3);
6974
6975 bind(L_post_third_loop_done);
6976 }
6977
6978 /**
6979 * Code for BigInteger::multiplyToLen() intrinsic.
6980 *
6981 * rdi: x
6982 * rax: xlen
6983 * rsi: y
6984 * rcx: ylen
6985 * r8: z
6986 * r11: zlen
6987 * r12: tmp1
6988 * r13: tmp2
6989 * r14: tmp3
6990 * r15: tmp4
6991 * rbx: tmp5
6992 *
6993 */
6994 void MacroAssembler::multiply_to_len(Register x, Register xlen, Register y, Register ylen, Register z, Register zlen,
6995 Register tmp1, Register tmp2, Register tmp3, Register tmp4, Register tmp5) {
6996 ShortBranchVerifier sbv(this);
6997 assert_different_registers(x, xlen, y, ylen, z, zlen, tmp1, tmp2, tmp3, tmp4, tmp5, rdx);
6998
6999 push(tmp1);
7000 push(tmp2);
7001 push(tmp3);
7002 push(tmp4);
7003 push(tmp5);
7004
7005 push(xlen);
7006 push(zlen);
7007
7008 const Register idx = tmp1;
7009 const Register kdx = tmp2;
7010 const Register xstart = tmp3;
7011
7012 const Register y_idx = tmp4;
7013 const Register carry = tmp5;
7014 const Register product = xlen;
7015 const Register x_xstart = zlen; // reuse register
7016
7017 // First Loop.
7018 //
7019 // final static long LONG_MASK = 0xffffffffL;
7020 // int xstart = xlen - 1;
7021 // int ystart = ylen - 1;
7022 // long carry = 0;
7023 // for (int idx=ystart, kdx=ystart+1+xstart; idx >= 0; idx-, kdx--) {
7024 // long product = (y[idx] & LONG_MASK) * (x[xstart] & LONG_MASK) + carry;
7025 // z[kdx] = (int)product;
7026 // carry = product >>> 32;
7027 // }
7028 // z[xstart] = (int)carry;
7029 //
7030
7031 movl(idx, ylen); // idx = ylen;
7032 movl(kdx, zlen); // kdx = xlen+ylen;
7033 xorq(carry, carry); // carry = 0;
7034
7035 Label L_done;
7036
7037 movl(xstart, xlen);
7038 decrementl(xstart);
7039 jcc(Assembler::negative, L_done);
7040
7041 multiply_64_x_64_loop(x, xstart, x_xstart, y, y_idx, z, carry, product, idx, kdx);
7042
7043 Label L_second_loop;
7044 testl(kdx, kdx);
7045 jcc(Assembler::zero, L_second_loop);
7046
7047 Label L_carry;
7048 subl(kdx, 1);
7049 jcc(Assembler::zero, L_carry);
7050
7051 movl(Address(z, kdx, Address::times_4, 0), carry);
7052 shrq(carry, 32);
7053 subl(kdx, 1);
7054
7055 bind(L_carry);
7056 movl(Address(z, kdx, Address::times_4, 0), carry);
7057
7058 // Second and third (nested) loops.
7059 //
7060 // for (int i = xstart-1; i >= 0; i--) { // Second loop
7061 // carry = 0;
7062 // for (int jdx=ystart, k=ystart+1+i; jdx >= 0; jdx--, k--) { // Third loop
7063 // long product = (y[jdx] & LONG_MASK) * (x[i] & LONG_MASK) +
7064 // (z[k] & LONG_MASK) + carry;
7065 // z[k] = (int)product;
7066 // carry = product >>> 32;
7067 // }
7068 // z[i] = (int)carry;
7069 // }
7070 //
7071 // i = xlen, j = tmp1, k = tmp2, carry = tmp5, x[i] = rdx
7072
7073 const Register jdx = tmp1;
7074
7075 bind(L_second_loop);
7076 xorl(carry, carry); // carry = 0;
7077 movl(jdx, ylen); // j = ystart+1
7078
7079 subl(xstart, 1); // i = xstart-1;
7080 jcc(Assembler::negative, L_done);
7081
7082 push (z);
7083
7084 Label L_last_x;
7085 lea(z, Address(z, xstart, Address::times_4, 4)); // z = z + k - j
7086 subl(xstart, 1); // i = xstart-1;
7087 jcc(Assembler::negative, L_last_x);
7088
7089 if (UseBMI2Instructions) {
7090 movq(rdx, Address(x, xstart, Address::times_4, 0));
7091 rorxq(rdx, rdx, 32); // convert big-endian to little-endian
7092 } else {
7093 movq(x_xstart, Address(x, xstart, Address::times_4, 0));
7094 rorq(x_xstart, 32); // convert big-endian to little-endian
7095 }
7096
7097 Label L_third_loop_prologue;
7098 bind(L_third_loop_prologue);
7099
7100 push (x);
7101 push (xstart);
7102 push (ylen);
7103
7104
7105 if (UseBMI2Instructions) {
7106 multiply_128_x_128_bmi2_loop(y, z, carry, x, jdx, ylen, product, tmp2, x_xstart, tmp3, tmp4);
7107 } else { // !UseBMI2Instructions
7108 multiply_128_x_128_loop(x_xstart, y, z, y_idx, jdx, ylen, carry, product, x);
7109 }
7110
7111 pop(ylen);
7112 pop(xlen);
7113 pop(x);
7114 pop(z);
7115
7116 movl(tmp3, xlen);
7117 addl(tmp3, 1);
7118 movl(Address(z, tmp3, Address::times_4, 0), carry);
7119 subl(tmp3, 1);
7120 jccb(Assembler::negative, L_done);
7121
7122 shrq(carry, 32);
7123 movl(Address(z, tmp3, Address::times_4, 0), carry);
7124 jmp(L_second_loop);
7125
7126 // Next infrequent code is moved outside loops.
7127 bind(L_last_x);
7128 if (UseBMI2Instructions) {
7129 movl(rdx, Address(x, 0));
7130 } else {
7131 movl(x_xstart, Address(x, 0));
7132 }
7133 jmp(L_third_loop_prologue);
7134
7135 bind(L_done);
7136
7137 pop(zlen);
7138 pop(xlen);
7139
7140 pop(tmp5);
7141 pop(tmp4);
7142 pop(tmp3);
7143 pop(tmp2);
7144 pop(tmp1);
7145 }
7146
7147 void MacroAssembler::vectorized_mismatch(Register obja, Register objb, Register length, Register log2_array_indxscale,
7148 Register result, Register tmp1, Register tmp2, XMMRegister rymm0, XMMRegister rymm1, XMMRegister rymm2){
7149 assert(UseSSE42Intrinsics, "SSE4.2 must be enabled.");
7150 Label VECTOR16_LOOP, VECTOR8_LOOP, VECTOR4_LOOP;
7151 Label VECTOR8_TAIL, VECTOR4_TAIL;
7152 Label VECTOR32_NOT_EQUAL, VECTOR16_NOT_EQUAL, VECTOR8_NOT_EQUAL, VECTOR4_NOT_EQUAL;
7153 Label SAME_TILL_END, DONE;
7154 Label BYTES_LOOP, BYTES_TAIL, BYTES_NOT_EQUAL;
7155
7156 //scale is in rcx in both Win64 and Unix
7157 ShortBranchVerifier sbv(this);
7158
7159 shlq(length);
7160 xorq(result, result);
7161
7162 if ((AVX3Threshold == 0) && (UseAVX > 2) &&
7163 VM_Version::supports_avx512vlbw()) {
7164 Label VECTOR64_LOOP, VECTOR64_NOT_EQUAL, VECTOR32_TAIL;
7165
7166 cmpq(length, 64);
7167 jcc(Assembler::less, VECTOR32_TAIL);
7168
7169 movq(tmp1, length);
7170 andq(tmp1, 0x3F); // tail count
7171 andq(length, ~(0x3F)); //vector count
7172
7173 bind(VECTOR64_LOOP);
7174 // AVX512 code to compare 64 byte vectors.
7175 evmovdqub(rymm0, Address(obja, result), Assembler::AVX_512bit);
7176 evpcmpeqb(k7, rymm0, Address(objb, result), Assembler::AVX_512bit);
7177 kortestql(k7, k7);
7178 jcc(Assembler::aboveEqual, VECTOR64_NOT_EQUAL); // mismatch
7179 addq(result, 64);
7180 subq(length, 64);
7181 jccb(Assembler::notZero, VECTOR64_LOOP);
7182
7183 //bind(VECTOR64_TAIL);
7184 testq(tmp1, tmp1);
7185 jcc(Assembler::zero, SAME_TILL_END);
7186
7187 //bind(VECTOR64_TAIL);
7188 // AVX512 code to compare up to 63 byte vectors.
7189 mov64(tmp2, 0xFFFFFFFFFFFFFFFF);
7190 shlxq(tmp2, tmp2, tmp1);
7191 notq(tmp2);
7192 kmovql(k3, tmp2);
7193
7194 evmovdqub(rymm0, k3, Address(obja, result), false, Assembler::AVX_512bit);
7195 evpcmpeqb(k7, k3, rymm0, Address(objb, result), Assembler::AVX_512bit);
7196
7197 ktestql(k7, k3);
7198 jcc(Assembler::below, SAME_TILL_END); // not mismatch
7199
7200 bind(VECTOR64_NOT_EQUAL);
7201 kmovql(tmp1, k7);
7202 notq(tmp1);
7203 tzcntq(tmp1, tmp1);
7204 addq(result, tmp1);
7205 shrq(result);
7206 jmp(DONE);
7207 bind(VECTOR32_TAIL);
7208 }
7209
7210 cmpq(length, 8);
7211 jcc(Assembler::equal, VECTOR8_LOOP);
7212 jcc(Assembler::less, VECTOR4_TAIL);
7213
7214 if (UseAVX >= 2) {
7215 Label VECTOR16_TAIL, VECTOR32_LOOP;
7216
7217 cmpq(length, 16);
7218 jcc(Assembler::equal, VECTOR16_LOOP);
7219 jcc(Assembler::less, VECTOR8_LOOP);
7220
7221 cmpq(length, 32);
7222 jccb(Assembler::less, VECTOR16_TAIL);
7223
7224 subq(length, 32);
7225 bind(VECTOR32_LOOP);
7226 vmovdqu(rymm0, Address(obja, result));
7227 vmovdqu(rymm1, Address(objb, result));
7228 vpxor(rymm2, rymm0, rymm1, Assembler::AVX_256bit);
7229 vptest(rymm2, rymm2);
7230 jcc(Assembler::notZero, VECTOR32_NOT_EQUAL);//mismatch found
7231 addq(result, 32);
7232 subq(length, 32);
7233 jcc(Assembler::greaterEqual, VECTOR32_LOOP);
7234 addq(length, 32);
7235 jcc(Assembler::equal, SAME_TILL_END);
7236 //falling through if less than 32 bytes left //close the branch here.
7237
7238 bind(VECTOR16_TAIL);
7239 cmpq(length, 16);
7240 jccb(Assembler::less, VECTOR8_TAIL);
7241 bind(VECTOR16_LOOP);
7242 movdqu(rymm0, Address(obja, result));
7243 movdqu(rymm1, Address(objb, result));
7244 vpxor(rymm2, rymm0, rymm1, Assembler::AVX_128bit);
7245 ptest(rymm2, rymm2);
7246 jcc(Assembler::notZero, VECTOR16_NOT_EQUAL);//mismatch found
7247 addq(result, 16);
7248 subq(length, 16);
7249 jcc(Assembler::equal, SAME_TILL_END);
7250 //falling through if less than 16 bytes left
7251 } else {//regular intrinsics
7252
7253 cmpq(length, 16);
7254 jccb(Assembler::less, VECTOR8_TAIL);
7255
7256 subq(length, 16);
7257 bind(VECTOR16_LOOP);
7258 movdqu(rymm0, Address(obja, result));
7259 movdqu(rymm1, Address(objb, result));
7260 pxor(rymm0, rymm1);
7261 ptest(rymm0, rymm0);
7262 jcc(Assembler::notZero, VECTOR16_NOT_EQUAL);//mismatch found
7263 addq(result, 16);
7264 subq(length, 16);
7265 jccb(Assembler::greaterEqual, VECTOR16_LOOP);
7266 addq(length, 16);
7267 jcc(Assembler::equal, SAME_TILL_END);
7268 //falling through if less than 16 bytes left
7269 }
7270
7271 bind(VECTOR8_TAIL);
7272 cmpq(length, 8);
7273 jccb(Assembler::less, VECTOR4_TAIL);
7274 bind(VECTOR8_LOOP);
7275 movq(tmp1, Address(obja, result));
7276 movq(tmp2, Address(objb, result));
7277 xorq(tmp1, tmp2);
7278 testq(tmp1, tmp1);
7279 jcc(Assembler::notZero, VECTOR8_NOT_EQUAL);//mismatch found
7280 addq(result, 8);
7281 subq(length, 8);
7282 jcc(Assembler::equal, SAME_TILL_END);
7283 //falling through if less than 8 bytes left
7284
7285 bind(VECTOR4_TAIL);
7286 cmpq(length, 4);
7287 jccb(Assembler::less, BYTES_TAIL);
7288 bind(VECTOR4_LOOP);
7289 movl(tmp1, Address(obja, result));
7290 xorl(tmp1, Address(objb, result));
7291 testl(tmp1, tmp1);
7292 jcc(Assembler::notZero, VECTOR4_NOT_EQUAL);//mismatch found
7293 addq(result, 4);
7294 subq(length, 4);
7295 jcc(Assembler::equal, SAME_TILL_END);
7296 //falling through if less than 4 bytes left
7297
7298 bind(BYTES_TAIL);
7299 bind(BYTES_LOOP);
7300 load_unsigned_byte(tmp1, Address(obja, result));
7301 load_unsigned_byte(tmp2, Address(objb, result));
7302 xorl(tmp1, tmp2);
7303 testl(tmp1, tmp1);
7304 jcc(Assembler::notZero, BYTES_NOT_EQUAL);//mismatch found
7305 decq(length);
7306 jcc(Assembler::zero, SAME_TILL_END);
7307 incq(result);
7308 load_unsigned_byte(tmp1, Address(obja, result));
7309 load_unsigned_byte(tmp2, Address(objb, result));
7310 xorl(tmp1, tmp2);
7311 testl(tmp1, tmp1);
7312 jcc(Assembler::notZero, BYTES_NOT_EQUAL);//mismatch found
7313 decq(length);
7314 jcc(Assembler::zero, SAME_TILL_END);
7315 incq(result);
7316 load_unsigned_byte(tmp1, Address(obja, result));
7317 load_unsigned_byte(tmp2, Address(objb, result));
7318 xorl(tmp1, tmp2);
7319 testl(tmp1, tmp1);
7320 jcc(Assembler::notZero, BYTES_NOT_EQUAL);//mismatch found
7321 jmp(SAME_TILL_END);
7322
7323 if (UseAVX >= 2) {
7324 bind(VECTOR32_NOT_EQUAL);
7325 vpcmpeqb(rymm2, rymm2, rymm2, Assembler::AVX_256bit);
7326 vpcmpeqb(rymm0, rymm0, rymm1, Assembler::AVX_256bit);
7327 vpxor(rymm0, rymm0, rymm2, Assembler::AVX_256bit);
7328 vpmovmskb(tmp1, rymm0);
7329 bsfq(tmp1, tmp1);
7330 addq(result, tmp1);
7331 shrq(result);
7332 jmp(DONE);
7333 }
7334
7335 bind(VECTOR16_NOT_EQUAL);
7336 if (UseAVX >= 2) {
7337 vpcmpeqb(rymm2, rymm2, rymm2, Assembler::AVX_128bit);
7338 vpcmpeqb(rymm0, rymm0, rymm1, Assembler::AVX_128bit);
7339 pxor(rymm0, rymm2);
7340 } else {
7341 pcmpeqb(rymm2, rymm2);
7342 pxor(rymm0, rymm1);
7343 pcmpeqb(rymm0, rymm1);
7344 pxor(rymm0, rymm2);
7345 }
7346 pmovmskb(tmp1, rymm0);
7347 bsfq(tmp1, tmp1);
7348 addq(result, tmp1);
7349 shrq(result);
7350 jmpb(DONE);
7351
7352 bind(VECTOR8_NOT_EQUAL);
7353 bind(VECTOR4_NOT_EQUAL);
7354 bsfq(tmp1, tmp1);
7355 shrq(tmp1, 3);
7356 addq(result, tmp1);
7357 bind(BYTES_NOT_EQUAL);
7358 shrq(result);
7359 jmpb(DONE);
7360
7361 bind(SAME_TILL_END);
7362 mov64(result, -1);
7363
7364 bind(DONE);
7365 }
7366
7367 //Helper functions for square_to_len()
7368
7369 /**
7370 * Store the squares of x[], right shifted one bit (divided by 2) into z[]
7371 * Preserves x and z and modifies rest of the registers.
7372 */
7373 void MacroAssembler::square_rshift(Register x, Register xlen, Register z, Register tmp1, Register tmp3, Register tmp4, Register tmp5, Register rdxReg, Register raxReg) {
7374 // Perform square and right shift by 1
7375 // Handle odd xlen case first, then for even xlen do the following
7376 // jlong carry = 0;
7377 // for (int j=0, i=0; j < xlen; j+=2, i+=4) {
7378 // huge_128 product = x[j:j+1] * x[j:j+1];
7379 // z[i:i+1] = (carry << 63) | (jlong)(product >>> 65);
7380 // z[i+2:i+3] = (jlong)(product >>> 1);
7381 // carry = (jlong)product;
7382 // }
7383
7384 xorq(tmp5, tmp5); // carry
7385 xorq(rdxReg, rdxReg);
7386 xorl(tmp1, tmp1); // index for x
7387 xorl(tmp4, tmp4); // index for z
7388
7389 Label L_first_loop, L_first_loop_exit;
7390
7391 testl(xlen, 1);
7392 jccb(Assembler::zero, L_first_loop); //jump if xlen is even
7393
7394 // Square and right shift by 1 the odd element using 32 bit multiply
7395 movl(raxReg, Address(x, tmp1, Address::times_4, 0));
7396 imulq(raxReg, raxReg);
7397 shrq(raxReg, 1);
7398 adcq(tmp5, 0);
7399 movq(Address(z, tmp4, Address::times_4, 0), raxReg);
7400 incrementl(tmp1);
7401 addl(tmp4, 2);
7402
7403 // Square and right shift by 1 the rest using 64 bit multiply
7404 bind(L_first_loop);
7405 cmpptr(tmp1, xlen);
7406 jccb(Assembler::equal, L_first_loop_exit);
7407
7408 // Square
7409 movq(raxReg, Address(x, tmp1, Address::times_4, 0));
7410 rorq(raxReg, 32); // convert big-endian to little-endian
7411 mulq(raxReg); // 64-bit multiply rax * rax -> rdx:rax
7412
7413 // Right shift by 1 and save carry
7414 shrq(tmp5, 1); // rdx:rax:tmp5 = (tmp5:rdx:rax) >>> 1
7415 rcrq(rdxReg, 1);
7416 rcrq(raxReg, 1);
7417 adcq(tmp5, 0);
7418
7419 // Store result in z
7420 movq(Address(z, tmp4, Address::times_4, 0), rdxReg);
7421 movq(Address(z, tmp4, Address::times_4, 8), raxReg);
7422
7423 // Update indices for x and z
7424 addl(tmp1, 2);
7425 addl(tmp4, 4);
7426 jmp(L_first_loop);
7427
7428 bind(L_first_loop_exit);
7429 }
7430
7431
7432 /**
7433 * Perform the following multiply add operation using BMI2 instructions
7434 * carry:sum = sum + op1*op2 + carry
7435 * op2 should be in rdx
7436 * op2 is preserved, all other registers are modified
7437 */
7438 void MacroAssembler::multiply_add_64_bmi2(Register sum, Register op1, Register op2, Register carry, Register tmp2) {
7439 // assert op2 is rdx
7440 mulxq(tmp2, op1, op1); // op1 * op2 -> tmp2:op1
7441 addq(sum, carry);
7442 adcq(tmp2, 0);
7443 addq(sum, op1);
7444 adcq(tmp2, 0);
7445 movq(carry, tmp2);
7446 }
7447
7448 /**
7449 * Perform the following multiply add operation:
7450 * carry:sum = sum + op1*op2 + carry
7451 * Preserves op1, op2 and modifies rest of registers
7452 */
7453 void MacroAssembler::multiply_add_64(Register sum, Register op1, Register op2, Register carry, Register rdxReg, Register raxReg) {
7454 // rdx:rax = op1 * op2
7455 movq(raxReg, op2);
7456 mulq(op1);
7457
7458 // rdx:rax = sum + carry + rdx:rax
7459 addq(sum, carry);
7460 adcq(rdxReg, 0);
7461 addq(sum, raxReg);
7462 adcq(rdxReg, 0);
7463
7464 // carry:sum = rdx:sum
7465 movq(carry, rdxReg);
7466 }
7467
7468 /**
7469 * Add 64 bit long carry into z[] with carry propagation.
7470 * Preserves z and carry register values and modifies rest of registers.
7471 *
7472 */
7473 void MacroAssembler::add_one_64(Register z, Register zlen, Register carry, Register tmp1) {
7474 Label L_fourth_loop, L_fourth_loop_exit;
7475
7476 movl(tmp1, 1);
7477 subl(zlen, 2);
7478 addq(Address(z, zlen, Address::times_4, 0), carry);
7479
7480 bind(L_fourth_loop);
7481 jccb(Assembler::carryClear, L_fourth_loop_exit);
7482 subl(zlen, 2);
7483 jccb(Assembler::negative, L_fourth_loop_exit);
7484 addq(Address(z, zlen, Address::times_4, 0), tmp1);
7485 jmp(L_fourth_loop);
7486 bind(L_fourth_loop_exit);
7487 }
7488
7489 /**
7490 * Shift z[] left by 1 bit.
7491 * Preserves x, len, z and zlen registers and modifies rest of the registers.
7492 *
7493 */
7494 void MacroAssembler::lshift_by_1(Register x, Register len, Register z, Register zlen, Register tmp1, Register tmp2, Register tmp3, Register tmp4) {
7495
7496 Label L_fifth_loop, L_fifth_loop_exit;
7497
7498 // Fifth loop
7499 // Perform primitiveLeftShift(z, zlen, 1)
7500
7501 const Register prev_carry = tmp1;
7502 const Register new_carry = tmp4;
7503 const Register value = tmp2;
7504 const Register zidx = tmp3;
7505
7506 // int zidx, carry;
7507 // long value;
7508 // carry = 0;
7509 // for (zidx = zlen-2; zidx >=0; zidx -= 2) {
7510 // (carry:value) = (z[i] << 1) | carry ;
7511 // z[i] = value;
7512 // }
7513
7514 movl(zidx, zlen);
7515 xorl(prev_carry, prev_carry); // clear carry flag and prev_carry register
7516
7517 bind(L_fifth_loop);
7518 decl(zidx); // Use decl to preserve carry flag
7519 decl(zidx);
7520 jccb(Assembler::negative, L_fifth_loop_exit);
7521
7522 if (UseBMI2Instructions) {
7523 movq(value, Address(z, zidx, Address::times_4, 0));
7524 rclq(value, 1);
7525 rorxq(value, value, 32);
7526 movq(Address(z, zidx, Address::times_4, 0), value); // Store back in big endian form
7527 }
7528 else {
7529 // clear new_carry
7530 xorl(new_carry, new_carry);
7531
7532 // Shift z[i] by 1, or in previous carry and save new carry
7533 movq(value, Address(z, zidx, Address::times_4, 0));
7534 shlq(value, 1);
7535 adcl(new_carry, 0);
7536
7537 orq(value, prev_carry);
7538 rorq(value, 0x20);
7539 movq(Address(z, zidx, Address::times_4, 0), value); // Store back in big endian form
7540
7541 // Set previous carry = new carry
7542 movl(prev_carry, new_carry);
7543 }
7544 jmp(L_fifth_loop);
7545
7546 bind(L_fifth_loop_exit);
7547 }
7548
7549
7550 /**
7551 * Code for BigInteger::squareToLen() intrinsic
7552 *
7553 * rdi: x
7554 * rsi: len
7555 * r8: z
7556 * rcx: zlen
7557 * r12: tmp1
7558 * r13: tmp2
7559 * r14: tmp3
7560 * r15: tmp4
7561 * rbx: tmp5
7562 *
7563 */
7564 void MacroAssembler::square_to_len(Register x, Register len, Register z, Register zlen, Register tmp1, Register tmp2, Register tmp3, Register tmp4, Register tmp5, Register rdxReg, Register raxReg) {
7565
7566 Label L_second_loop, L_second_loop_exit, L_third_loop, L_third_loop_exit, L_last_x, L_multiply;
7567 push(tmp1);
7568 push(tmp2);
7569 push(tmp3);
7570 push(tmp4);
7571 push(tmp5);
7572
7573 // First loop
7574 // Store the squares, right shifted one bit (i.e., divided by 2).
7575 square_rshift(x, len, z, tmp1, tmp3, tmp4, tmp5, rdxReg, raxReg);
7576
7577 // Add in off-diagonal sums.
7578 //
7579 // Second, third (nested) and fourth loops.
7580 // zlen +=2;
7581 // for (int xidx=len-2,zidx=zlen-4; xidx > 0; xidx-=2,zidx-=4) {
7582 // carry = 0;
7583 // long op2 = x[xidx:xidx+1];
7584 // for (int j=xidx-2,k=zidx; j >= 0; j-=2) {
7585 // k -= 2;
7586 // long op1 = x[j:j+1];
7587 // long sum = z[k:k+1];
7588 // carry:sum = multiply_add_64(sum, op1, op2, carry, tmp_regs);
7589 // z[k:k+1] = sum;
7590 // }
7591 // add_one_64(z, k, carry, tmp_regs);
7592 // }
7593
7594 const Register carry = tmp5;
7595 const Register sum = tmp3;
7596 const Register op1 = tmp4;
7597 Register op2 = tmp2;
7598
7599 push(zlen);
7600 push(len);
7601 addl(zlen,2);
7602 bind(L_second_loop);
7603 xorq(carry, carry);
7604 subl(zlen, 4);
7605 subl(len, 2);
7606 push(zlen);
7607 push(len);
7608 cmpl(len, 0);
7609 jccb(Assembler::lessEqual, L_second_loop_exit);
7610
7611 // Multiply an array by one 64 bit long.
7612 if (UseBMI2Instructions) {
7613 op2 = rdxReg;
7614 movq(op2, Address(x, len, Address::times_4, 0));
7615 rorxq(op2, op2, 32);
7616 }
7617 else {
7618 movq(op2, Address(x, len, Address::times_4, 0));
7619 rorq(op2, 32);
7620 }
7621
7622 bind(L_third_loop);
7623 decrementl(len);
7624 jccb(Assembler::negative, L_third_loop_exit);
7625 decrementl(len);
7626 jccb(Assembler::negative, L_last_x);
7627
7628 movq(op1, Address(x, len, Address::times_4, 0));
7629 rorq(op1, 32);
7630
7631 bind(L_multiply);
7632 subl(zlen, 2);
7633 movq(sum, Address(z, zlen, Address::times_4, 0));
7634
7635 // Multiply 64 bit by 64 bit and add 64 bits lower half and upper 64 bits as carry.
7636 if (UseBMI2Instructions) {
7637 multiply_add_64_bmi2(sum, op1, op2, carry, tmp2);
7638 }
7639 else {
7640 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg);
7641 }
7642
7643 movq(Address(z, zlen, Address::times_4, 0), sum);
7644
7645 jmp(L_third_loop);
7646 bind(L_third_loop_exit);
7647
7648 // Fourth loop
7649 // Add 64 bit long carry into z with carry propagation.
7650 // Uses offsetted zlen.
7651 add_one_64(z, zlen, carry, tmp1);
7652
7653 pop(len);
7654 pop(zlen);
7655 jmp(L_second_loop);
7656
7657 // Next infrequent code is moved outside loops.
7658 bind(L_last_x);
7659 movl(op1, Address(x, 0));
7660 jmp(L_multiply);
7661
7662 bind(L_second_loop_exit);
7663 pop(len);
7664 pop(zlen);
7665 pop(len);
7666 pop(zlen);
7667
7668 // Fifth loop
7669 // Shift z left 1 bit.
7670 lshift_by_1(x, len, z, zlen, tmp1, tmp2, tmp3, tmp4);
7671
7672 // z[zlen-1] |= x[len-1] & 1;
7673 movl(tmp3, Address(x, len, Address::times_4, -4));
7674 andl(tmp3, 1);
7675 orl(Address(z, zlen, Address::times_4, -4), tmp3);
7676
7677 pop(tmp5);
7678 pop(tmp4);
7679 pop(tmp3);
7680 pop(tmp2);
7681 pop(tmp1);
7682 }
7683
7684 /**
7685 * Helper function for mul_add()
7686 * Multiply the in[] by int k and add to out[] starting at offset offs using
7687 * 128 bit by 32 bit multiply and return the carry in tmp5.
7688 * Only quad int aligned length of in[] is operated on in this function.
7689 * k is in rdxReg for BMI2Instructions, for others it is in tmp2.
7690 * This function preserves out, in and k registers.
7691 * len and offset point to the appropriate index in "in" & "out" correspondingly
7692 * tmp5 has the carry.
7693 * other registers are temporary and are modified.
7694 *
7695 */
7696 void MacroAssembler::mul_add_128_x_32_loop(Register out, Register in,
7697 Register offset, Register len, Register tmp1, Register tmp2, Register tmp3,
7698 Register tmp4, Register tmp5, Register rdxReg, Register raxReg) {
7699
7700 Label L_first_loop, L_first_loop_exit;
7701
7702 movl(tmp1, len);
7703 shrl(tmp1, 2);
7704
7705 bind(L_first_loop);
7706 subl(tmp1, 1);
7707 jccb(Assembler::negative, L_first_loop_exit);
7708
7709 subl(len, 4);
7710 subl(offset, 4);
7711
7712 Register op2 = tmp2;
7713 const Register sum = tmp3;
7714 const Register op1 = tmp4;
7715 const Register carry = tmp5;
7716
7717 if (UseBMI2Instructions) {
7718 op2 = rdxReg;
7719 }
7720
7721 movq(op1, Address(in, len, Address::times_4, 8));
7722 rorq(op1, 32);
7723 movq(sum, Address(out, offset, Address::times_4, 8));
7724 rorq(sum, 32);
7725 if (UseBMI2Instructions) {
7726 multiply_add_64_bmi2(sum, op1, op2, carry, raxReg);
7727 }
7728 else {
7729 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg);
7730 }
7731 // Store back in big endian from little endian
7732 rorq(sum, 0x20);
7733 movq(Address(out, offset, Address::times_4, 8), sum);
7734
7735 movq(op1, Address(in, len, Address::times_4, 0));
7736 rorq(op1, 32);
7737 movq(sum, Address(out, offset, Address::times_4, 0));
7738 rorq(sum, 32);
7739 if (UseBMI2Instructions) {
7740 multiply_add_64_bmi2(sum, op1, op2, carry, raxReg);
7741 }
7742 else {
7743 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg);
7744 }
7745 // Store back in big endian from little endian
7746 rorq(sum, 0x20);
7747 movq(Address(out, offset, Address::times_4, 0), sum);
7748
7749 jmp(L_first_loop);
7750 bind(L_first_loop_exit);
7751 }
7752
7753 /**
7754 * Code for BigInteger::mulAdd() intrinsic
7755 *
7756 * rdi: out
7757 * rsi: in
7758 * r11: offs (out.length - offset)
7759 * rcx: len
7760 * r8: k
7761 * r12: tmp1
7762 * r13: tmp2
7763 * r14: tmp3
7764 * r15: tmp4
7765 * rbx: tmp5
7766 * Multiply the in[] by word k and add to out[], return the carry in rax
7767 */
7768 void MacroAssembler::mul_add(Register out, Register in, Register offs,
7769 Register len, Register k, Register tmp1, Register tmp2, Register tmp3,
7770 Register tmp4, Register tmp5, Register rdxReg, Register raxReg) {
7771
7772 Label L_carry, L_last_in, L_done;
7773
7774 // carry = 0;
7775 // for (int j=len-1; j >= 0; j--) {
7776 // long product = (in[j] & LONG_MASK) * kLong +
7777 // (out[offs] & LONG_MASK) + carry;
7778 // out[offs--] = (int)product;
7779 // carry = product >>> 32;
7780 // }
7781 //
7782 push(tmp1);
7783 push(tmp2);
7784 push(tmp3);
7785 push(tmp4);
7786 push(tmp5);
7787
7788 Register op2 = tmp2;
7789 const Register sum = tmp3;
7790 const Register op1 = tmp4;
7791 const Register carry = tmp5;
7792
7793 if (UseBMI2Instructions) {
7794 op2 = rdxReg;
7795 movl(op2, k);
7796 }
7797 else {
7798 movl(op2, k);
7799 }
7800
7801 xorq(carry, carry);
7802
7803 //First loop
7804
7805 //Multiply in[] by k in a 4 way unrolled loop using 128 bit by 32 bit multiply
7806 //The carry is in tmp5
7807 mul_add_128_x_32_loop(out, in, offs, len, tmp1, tmp2, tmp3, tmp4, tmp5, rdxReg, raxReg);
7808
7809 //Multiply the trailing in[] entry using 64 bit by 32 bit, if any
7810 decrementl(len);
7811 jccb(Assembler::negative, L_carry);
7812 decrementl(len);
7813 jccb(Assembler::negative, L_last_in);
7814
7815 movq(op1, Address(in, len, Address::times_4, 0));
7816 rorq(op1, 32);
7817
7818 subl(offs, 2);
7819 movq(sum, Address(out, offs, Address::times_4, 0));
7820 rorq(sum, 32);
7821
7822 if (UseBMI2Instructions) {
7823 multiply_add_64_bmi2(sum, op1, op2, carry, raxReg);
7824 }
7825 else {
7826 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg);
7827 }
7828
7829 // Store back in big endian from little endian
7830 rorq(sum, 0x20);
7831 movq(Address(out, offs, Address::times_4, 0), sum);
7832
7833 testl(len, len);
7834 jccb(Assembler::zero, L_carry);
7835
7836 //Multiply the last in[] entry, if any
7837 bind(L_last_in);
7838 movl(op1, Address(in, 0));
7839 movl(sum, Address(out, offs, Address::times_4, -4));
7840
7841 movl(raxReg, k);
7842 mull(op1); //tmp4 * eax -> edx:eax
7843 addl(sum, carry);
7844 adcl(rdxReg, 0);
7845 addl(sum, raxReg);
7846 adcl(rdxReg, 0);
7847 movl(carry, rdxReg);
7848
7849 movl(Address(out, offs, Address::times_4, -4), sum);
7850
7851 bind(L_carry);
7852 //return tmp5/carry as carry in rax
7853 movl(rax, carry);
7854
7855 bind(L_done);
7856 pop(tmp5);
7857 pop(tmp4);
7858 pop(tmp3);
7859 pop(tmp2);
7860 pop(tmp1);
7861 }
7862 #endif
7863
7864 /**
7865 * Emits code to update CRC-32 with a byte value according to constants in table
7866 *
7867 * @param [in,out]crc Register containing the crc.
7868 * @param [in]val Register containing the byte to fold into the CRC.
7869 * @param [in]table Register containing the table of crc constants.
7870 *
7871 * uint32_t crc;
7872 * val = crc_table[(val ^ crc) & 0xFF];
7873 * crc = val ^ (crc >> 8);
7874 *
7875 */
7876 void MacroAssembler::update_byte_crc32(Register crc, Register val, Register table) {
7877 xorl(val, crc);
7878 andl(val, 0xFF);
7879 shrl(crc, 8); // unsigned shift
7880 xorl(crc, Address(table, val, Address::times_4, 0));
7881 }
7882
7883 /**
7884 * Fold 128-bit data chunk
7885 */
7886 void MacroAssembler::fold_128bit_crc32(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, Register buf, int offset) {
7887 if (UseAVX > 0) {
7888 vpclmulhdq(xtmp, xK, xcrc); // [123:64]
7889 vpclmulldq(xcrc, xK, xcrc); // [63:0]
7890 vpxor(xcrc, xcrc, Address(buf, offset), 0 /* vector_len */);
7891 pxor(xcrc, xtmp);
7892 } else {
7893 movdqa(xtmp, xcrc);
7894 pclmulhdq(xtmp, xK); // [123:64]
7895 pclmulldq(xcrc, xK); // [63:0]
7896 pxor(xcrc, xtmp);
7897 movdqu(xtmp, Address(buf, offset));
7898 pxor(xcrc, xtmp);
7899 }
7900 }
7901
7902 void MacroAssembler::fold_128bit_crc32(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, XMMRegister xbuf) {
7903 if (UseAVX > 0) {
7904 vpclmulhdq(xtmp, xK, xcrc);
7905 vpclmulldq(xcrc, xK, xcrc);
7906 pxor(xcrc, xbuf);
7907 pxor(xcrc, xtmp);
7908 } else {
7909 movdqa(xtmp, xcrc);
7910 pclmulhdq(xtmp, xK);
7911 pclmulldq(xcrc, xK);
7912 pxor(xcrc, xbuf);
7913 pxor(xcrc, xtmp);
7914 }
7915 }
7916
7917 /**
7918 * 8-bit folds to compute 32-bit CRC
7919 *
7920 * uint64_t xcrc;
7921 * timesXtoThe32[xcrc & 0xFF] ^ (xcrc >> 8);
7922 */
7923 void MacroAssembler::fold_8bit_crc32(XMMRegister xcrc, Register table, XMMRegister xtmp, Register tmp) {
7924 movdl(tmp, xcrc);
7925 andl(tmp, 0xFF);
7926 movdl(xtmp, Address(table, tmp, Address::times_4, 0));
7927 psrldq(xcrc, 1); // unsigned shift one byte
7928 pxor(xcrc, xtmp);
7929 }
7930
7931 /**
7932 * uint32_t crc;
7933 * timesXtoThe32[crc & 0xFF] ^ (crc >> 8);
7934 */
7935 void MacroAssembler::fold_8bit_crc32(Register crc, Register table, Register tmp) {
7936 movl(tmp, crc);
7937 andl(tmp, 0xFF);
7938 shrl(crc, 8);
7939 xorl(crc, Address(table, tmp, Address::times_4, 0));
7940 }
7941
7942 /**
7943 * @param crc register containing existing CRC (32-bit)
7944 * @param buf register pointing to input byte buffer (byte*)
7945 * @param len register containing number of bytes
7946 * @param table register that will contain address of CRC table
7947 * @param tmp scratch register
7948 */
7949 void MacroAssembler::kernel_crc32(Register crc, Register buf, Register len, Register table, Register tmp) {
7950 assert_different_registers(crc, buf, len, table, tmp, rax);
7951
7952 Label L_tail, L_tail_restore, L_tail_loop, L_exit, L_align_loop, L_aligned;
7953 Label L_fold_tail, L_fold_128b, L_fold_512b, L_fold_512b_loop, L_fold_tail_loop;
7954
7955 // For EVEX with VL and BW, provide a standard mask, VL = 128 will guide the merge
7956 // context for the registers used, where all instructions below are using 128-bit mode
7957 // On EVEX without VL and BW, these instructions will all be AVX.
7958 lea(table, ExternalAddress(StubRoutines::crc_table_addr()));
7959 notl(crc); // ~crc
7960 cmpl(len, 16);
7961 jcc(Assembler::less, L_tail);
7962
7963 // Align buffer to 16 bytes
7964 movl(tmp, buf);
7965 andl(tmp, 0xF);
7966 jccb(Assembler::zero, L_aligned);
7967 subl(tmp, 16);
7968 addl(len, tmp);
7969
7970 align(4);
7971 BIND(L_align_loop);
7972 movsbl(rax, Address(buf, 0)); // load byte with sign extension
7973 update_byte_crc32(crc, rax, table);
7974 increment(buf);
7975 incrementl(tmp);
7976 jccb(Assembler::less, L_align_loop);
7977
7978 BIND(L_aligned);
7979 movl(tmp, len); // save
7980 shrl(len, 4);
7981 jcc(Assembler::zero, L_tail_restore);
7982
7983 // Fold crc into first bytes of vector
7984 movdqa(xmm1, Address(buf, 0));
7985 movdl(rax, xmm1);
7986 xorl(crc, rax);
7987 if (VM_Version::supports_sse4_1()) {
7988 pinsrd(xmm1, crc, 0);
7989 } else {
7990 pinsrw(xmm1, crc, 0);
7991 shrl(crc, 16);
7992 pinsrw(xmm1, crc, 1);
7993 }
7994 addptr(buf, 16);
7995 subl(len, 4); // len > 0
7996 jcc(Assembler::less, L_fold_tail);
7997
7998 movdqa(xmm2, Address(buf, 0));
7999 movdqa(xmm3, Address(buf, 16));
8000 movdqa(xmm4, Address(buf, 32));
8001 addptr(buf, 48);
8002 subl(len, 3);
8003 jcc(Assembler::lessEqual, L_fold_512b);
8004
8005 // Fold total 512 bits of polynomial on each iteration,
8006 // 128 bits per each of 4 parallel streams.
8007 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 32), rscratch1);
8008
8009 align32();
8010 BIND(L_fold_512b_loop);
8011 fold_128bit_crc32(xmm1, xmm0, xmm5, buf, 0);
8012 fold_128bit_crc32(xmm2, xmm0, xmm5, buf, 16);
8013 fold_128bit_crc32(xmm3, xmm0, xmm5, buf, 32);
8014 fold_128bit_crc32(xmm4, xmm0, xmm5, buf, 48);
8015 addptr(buf, 64);
8016 subl(len, 4);
8017 jcc(Assembler::greater, L_fold_512b_loop);
8018
8019 // Fold 512 bits to 128 bits.
8020 BIND(L_fold_512b);
8021 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 16), rscratch1);
8022 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm2);
8023 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm3);
8024 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm4);
8025
8026 // Fold the rest of 128 bits data chunks
8027 BIND(L_fold_tail);
8028 addl(len, 3);
8029 jccb(Assembler::lessEqual, L_fold_128b);
8030 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 16), rscratch1);
8031
8032 BIND(L_fold_tail_loop);
8033 fold_128bit_crc32(xmm1, xmm0, xmm5, buf, 0);
8034 addptr(buf, 16);
8035 decrementl(len);
8036 jccb(Assembler::greater, L_fold_tail_loop);
8037
8038 // Fold 128 bits in xmm1 down into 32 bits in crc register.
8039 BIND(L_fold_128b);
8040 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr()), rscratch1);
8041 if (UseAVX > 0) {
8042 vpclmulqdq(xmm2, xmm0, xmm1, 0x1);
8043 vpand(xmm3, xmm0, xmm2, 0 /* vector_len */);
8044 vpclmulqdq(xmm0, xmm0, xmm3, 0x1);
8045 } else {
8046 movdqa(xmm2, xmm0);
8047 pclmulqdq(xmm2, xmm1, 0x1);
8048 movdqa(xmm3, xmm0);
8049 pand(xmm3, xmm2);
8050 pclmulqdq(xmm0, xmm3, 0x1);
8051 }
8052 psrldq(xmm1, 8);
8053 psrldq(xmm2, 4);
8054 pxor(xmm0, xmm1);
8055 pxor(xmm0, xmm2);
8056
8057 // 8 8-bit folds to compute 32-bit CRC.
8058 for (int j = 0; j < 4; j++) {
8059 fold_8bit_crc32(xmm0, table, xmm1, rax);
8060 }
8061 movdl(crc, xmm0); // mov 32 bits to general register
8062 for (int j = 0; j < 4; j++) {
8063 fold_8bit_crc32(crc, table, rax);
8064 }
8065
8066 BIND(L_tail_restore);
8067 movl(len, tmp); // restore
8068 BIND(L_tail);
8069 andl(len, 0xf);
8070 jccb(Assembler::zero, L_exit);
8071
8072 // Fold the rest of bytes
8073 align(4);
8074 BIND(L_tail_loop);
8075 movsbl(rax, Address(buf, 0)); // load byte with sign extension
8076 update_byte_crc32(crc, rax, table);
8077 increment(buf);
8078 decrementl(len);
8079 jccb(Assembler::greater, L_tail_loop);
8080
8081 BIND(L_exit);
8082 notl(crc); // ~c
8083 }
8084
8085 #ifdef _LP64
8086 // Helper function for AVX 512 CRC32
8087 // Fold 512-bit data chunks
8088 void MacroAssembler::fold512bit_crc32_avx512(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, Register buf,
8089 Register pos, int offset) {
8090 evmovdquq(xmm3, Address(buf, pos, Address::times_1, offset), Assembler::AVX_512bit);
8091 evpclmulqdq(xtmp, xcrc, xK, 0x10, Assembler::AVX_512bit); // [123:64]
8092 evpclmulqdq(xmm2, xcrc, xK, 0x01, Assembler::AVX_512bit); // [63:0]
8093 evpxorq(xcrc, xtmp, xmm2, Assembler::AVX_512bit /* vector_len */);
8094 evpxorq(xcrc, xcrc, xmm3, Assembler::AVX_512bit /* vector_len */);
8095 }
8096
8097 // Helper function for AVX 512 CRC32
8098 // Compute CRC32 for < 256B buffers
8099 void MacroAssembler::kernel_crc32_avx512_256B(Register crc, Register buf, Register len, Register table, Register pos,
8100 Register tmp1, Register tmp2, Label& L_barrett, Label& L_16B_reduction_loop,
8101 Label& L_get_last_two_xmms, Label& L_128_done, Label& L_cleanup) {
8102
8103 Label L_less_than_32, L_exact_16_left, L_less_than_16_left;
8104 Label L_less_than_8_left, L_less_than_4_left, L_less_than_2_left, L_zero_left;
8105 Label L_only_less_than_4, L_only_less_than_3, L_only_less_than_2;
8106
8107 // check if there is enough buffer to be able to fold 16B at a time
8108 cmpl(len, 32);
8109 jcc(Assembler::less, L_less_than_32);
8110
8111 // if there is, load the constants
8112 movdqu(xmm10, Address(table, 1 * 16)); //rk1 and rk2 in xmm10
8113 movdl(xmm0, crc); // get the initial crc value
8114 movdqu(xmm7, Address(buf, pos, Address::times_1, 0 * 16)); //load the plaintext
8115 pxor(xmm7, xmm0);
8116
8117 // update the buffer pointer
8118 addl(pos, 16);
8119 //update the counter.subtract 32 instead of 16 to save one instruction from the loop
8120 subl(len, 32);
8121 jmp(L_16B_reduction_loop);
8122
8123 bind(L_less_than_32);
8124 //mov initial crc to the return value. this is necessary for zero - length buffers.
8125 movl(rax, crc);
8126 testl(len, len);
8127 jcc(Assembler::equal, L_cleanup);
8128
8129 movdl(xmm0, crc); //get the initial crc value
8130
8131 cmpl(len, 16);
8132 jcc(Assembler::equal, L_exact_16_left);
8133 jcc(Assembler::less, L_less_than_16_left);
8134
8135 movdqu(xmm7, Address(buf, pos, Address::times_1, 0 * 16)); //load the plaintext
8136 pxor(xmm7, xmm0); //xor the initial crc value
8137 addl(pos, 16);
8138 subl(len, 16);
8139 movdqu(xmm10, Address(table, 1 * 16)); // rk1 and rk2 in xmm10
8140 jmp(L_get_last_two_xmms);
8141
8142 bind(L_less_than_16_left);
8143 //use stack space to load data less than 16 bytes, zero - out the 16B in memory first.
8144 pxor(xmm1, xmm1);
8145 movptr(tmp1, rsp);
8146 movdqu(Address(tmp1, 0 * 16), xmm1);
8147
8148 cmpl(len, 4);
8149 jcc(Assembler::less, L_only_less_than_4);
8150
8151 //backup the counter value
8152 movl(tmp2, len);
8153 cmpl(len, 8);
8154 jcc(Assembler::less, L_less_than_8_left);
8155
8156 //load 8 Bytes
8157 movq(rax, Address(buf, pos, Address::times_1, 0 * 16));
8158 movq(Address(tmp1, 0 * 16), rax);
8159 addptr(tmp1, 8);
8160 subl(len, 8);
8161 addl(pos, 8);
8162
8163 bind(L_less_than_8_left);
8164 cmpl(len, 4);
8165 jcc(Assembler::less, L_less_than_4_left);
8166
8167 //load 4 Bytes
8168 movl(rax, Address(buf, pos, Address::times_1, 0));
8169 movl(Address(tmp1, 0 * 16), rax);
8170 addptr(tmp1, 4);
8171 subl(len, 4);
8172 addl(pos, 4);
8173
8174 bind(L_less_than_4_left);
8175 cmpl(len, 2);
8176 jcc(Assembler::less, L_less_than_2_left);
8177
8178 // load 2 Bytes
8179 movw(rax, Address(buf, pos, Address::times_1, 0));
8180 movl(Address(tmp1, 0 * 16), rax);
8181 addptr(tmp1, 2);
8182 subl(len, 2);
8183 addl(pos, 2);
8184
8185 bind(L_less_than_2_left);
8186 cmpl(len, 1);
8187 jcc(Assembler::less, L_zero_left);
8188
8189 // load 1 Byte
8190 movb(rax, Address(buf, pos, Address::times_1, 0));
8191 movb(Address(tmp1, 0 * 16), rax);
8192
8193 bind(L_zero_left);
8194 movdqu(xmm7, Address(rsp, 0));
8195 pxor(xmm7, xmm0); //xor the initial crc value
8196
8197 lea(rax, ExternalAddress(StubRoutines::x86::shuf_table_crc32_avx512_addr()));
8198 movdqu(xmm0, Address(rax, tmp2));
8199 pshufb(xmm7, xmm0);
8200 jmp(L_128_done);
8201
8202 bind(L_exact_16_left);
8203 movdqu(xmm7, Address(buf, pos, Address::times_1, 0));
8204 pxor(xmm7, xmm0); //xor the initial crc value
8205 jmp(L_128_done);
8206
8207 bind(L_only_less_than_4);
8208 cmpl(len, 3);
8209 jcc(Assembler::less, L_only_less_than_3);
8210
8211 // load 3 Bytes
8212 movb(rax, Address(buf, pos, Address::times_1, 0));
8213 movb(Address(tmp1, 0), rax);
8214
8215 movb(rax, Address(buf, pos, Address::times_1, 1));
8216 movb(Address(tmp1, 1), rax);
8217
8218 movb(rax, Address(buf, pos, Address::times_1, 2));
8219 movb(Address(tmp1, 2), rax);
8220
8221 movdqu(xmm7, Address(rsp, 0));
8222 pxor(xmm7, xmm0); //xor the initial crc value
8223
8224 pslldq(xmm7, 0x5);
8225 jmp(L_barrett);
8226 bind(L_only_less_than_3);
8227 cmpl(len, 2);
8228 jcc(Assembler::less, L_only_less_than_2);
8229
8230 // load 2 Bytes
8231 movb(rax, Address(buf, pos, Address::times_1, 0));
8232 movb(Address(tmp1, 0), rax);
8233
8234 movb(rax, Address(buf, pos, Address::times_1, 1));
8235 movb(Address(tmp1, 1), rax);
8236
8237 movdqu(xmm7, Address(rsp, 0));
8238 pxor(xmm7, xmm0); //xor the initial crc value
8239
8240 pslldq(xmm7, 0x6);
8241 jmp(L_barrett);
8242
8243 bind(L_only_less_than_2);
8244 //load 1 Byte
8245 movb(rax, Address(buf, pos, Address::times_1, 0));
8246 movb(Address(tmp1, 0), rax);
8247
8248 movdqu(xmm7, Address(rsp, 0));
8249 pxor(xmm7, xmm0); //xor the initial crc value
8250
8251 pslldq(xmm7, 0x7);
8252 }
8253
8254 /**
8255 * Compute CRC32 using AVX512 instructions
8256 * param crc register containing existing CRC (32-bit)
8257 * param buf register pointing to input byte buffer (byte*)
8258 * param len register containing number of bytes
8259 * param table address of crc or crc32c table
8260 * param tmp1 scratch register
8261 * param tmp2 scratch register
8262 * return rax result register
8263 *
8264 * This routine is identical for crc32c with the exception of the precomputed constant
8265 * table which will be passed as the table argument. The calculation steps are
8266 * the same for both variants.
8267 */
8268 void MacroAssembler::kernel_crc32_avx512(Register crc, Register buf, Register len, Register table, Register tmp1, Register tmp2) {
8269 assert_different_registers(crc, buf, len, table, tmp1, tmp2, rax, r12);
8270
8271 Label L_tail, L_tail_restore, L_tail_loop, L_exit, L_align_loop, L_aligned;
8272 Label L_fold_tail, L_fold_128b, L_fold_512b, L_fold_512b_loop, L_fold_tail_loop;
8273 Label L_less_than_256, L_fold_128_B_loop, L_fold_256_B_loop;
8274 Label L_fold_128_B_register, L_final_reduction_for_128, L_16B_reduction_loop;
8275 Label L_128_done, L_get_last_two_xmms, L_barrett, L_cleanup;
8276
8277 const Register pos = r12;
8278 push(r12);
8279 subptr(rsp, 16 * 2 + 8);
8280
8281 // For EVEX with VL and BW, provide a standard mask, VL = 128 will guide the merge
8282 // context for the registers used, where all instructions below are using 128-bit mode
8283 // On EVEX without VL and BW, these instructions will all be AVX.
8284 movl(pos, 0);
8285
8286 // check if smaller than 256B
8287 cmpl(len, 256);
8288 jcc(Assembler::less, L_less_than_256);
8289
8290 // load the initial crc value
8291 movdl(xmm10, crc);
8292
8293 // receive the initial 64B data, xor the initial crc value
8294 evmovdquq(xmm0, Address(buf, pos, Address::times_1, 0 * 64), Assembler::AVX_512bit);
8295 evmovdquq(xmm4, Address(buf, pos, Address::times_1, 1 * 64), Assembler::AVX_512bit);
8296 evpxorq(xmm0, xmm0, xmm10, Assembler::AVX_512bit);
8297 evbroadcasti32x4(xmm10, Address(table, 2 * 16), Assembler::AVX_512bit); //zmm10 has rk3 and rk4
8298
8299 subl(len, 256);
8300 cmpl(len, 256);
8301 jcc(Assembler::less, L_fold_128_B_loop);
8302
8303 evmovdquq(xmm7, Address(buf, pos, Address::times_1, 2 * 64), Assembler::AVX_512bit);
8304 evmovdquq(xmm8, Address(buf, pos, Address::times_1, 3 * 64), Assembler::AVX_512bit);
8305 evbroadcasti32x4(xmm16, Address(table, 0 * 16), Assembler::AVX_512bit); //zmm16 has rk-1 and rk-2
8306 subl(len, 256);
8307
8308 bind(L_fold_256_B_loop);
8309 addl(pos, 256);
8310 fold512bit_crc32_avx512(xmm0, xmm16, xmm1, buf, pos, 0 * 64);
8311 fold512bit_crc32_avx512(xmm4, xmm16, xmm1, buf, pos, 1 * 64);
8312 fold512bit_crc32_avx512(xmm7, xmm16, xmm1, buf, pos, 2 * 64);
8313 fold512bit_crc32_avx512(xmm8, xmm16, xmm1, buf, pos, 3 * 64);
8314
8315 subl(len, 256);
8316 jcc(Assembler::greaterEqual, L_fold_256_B_loop);
8317
8318 // Fold 256 into 128
8319 addl(pos, 256);
8320 evpclmulqdq(xmm1, xmm0, xmm10, 0x01, Assembler::AVX_512bit);
8321 evpclmulqdq(xmm2, xmm0, xmm10, 0x10, Assembler::AVX_512bit);
8322 vpternlogq(xmm7, 0x96, xmm1, xmm2, Assembler::AVX_512bit); // xor ABC
8323
8324 evpclmulqdq(xmm5, xmm4, xmm10, 0x01, Assembler::AVX_512bit);
8325 evpclmulqdq(xmm6, xmm4, xmm10, 0x10, Assembler::AVX_512bit);
8326 vpternlogq(xmm8, 0x96, xmm5, xmm6, Assembler::AVX_512bit); // xor ABC
8327
8328 evmovdquq(xmm0, xmm7, Assembler::AVX_512bit);
8329 evmovdquq(xmm4, xmm8, Assembler::AVX_512bit);
8330
8331 addl(len, 128);
8332 jmp(L_fold_128_B_register);
8333
8334 // at this section of the code, there is 128 * x + y(0 <= y<128) bytes of buffer.The fold_128_B_loop
8335 // loop will fold 128B at a time until we have 128 + y Bytes of buffer
8336
8337 // fold 128B at a time.This section of the code folds 8 xmm registers in parallel
8338 bind(L_fold_128_B_loop);
8339 addl(pos, 128);
8340 fold512bit_crc32_avx512(xmm0, xmm10, xmm1, buf, pos, 0 * 64);
8341 fold512bit_crc32_avx512(xmm4, xmm10, xmm1, buf, pos, 1 * 64);
8342
8343 subl(len, 128);
8344 jcc(Assembler::greaterEqual, L_fold_128_B_loop);
8345
8346 addl(pos, 128);
8347
8348 // at this point, the buffer pointer is pointing at the last y Bytes of the buffer, where 0 <= y < 128
8349 // the 128B of folded data is in 8 of the xmm registers : xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7
8350 bind(L_fold_128_B_register);
8351 evmovdquq(xmm16, Address(table, 5 * 16), Assembler::AVX_512bit); // multiply by rk9-rk16
8352 evmovdquq(xmm11, Address(table, 9 * 16), Assembler::AVX_512bit); // multiply by rk17-rk20, rk1,rk2, 0,0
8353 evpclmulqdq(xmm1, xmm0, xmm16, 0x01, Assembler::AVX_512bit);
8354 evpclmulqdq(xmm2, xmm0, xmm16, 0x10, Assembler::AVX_512bit);
8355 // save last that has no multiplicand
8356 vextracti64x2(xmm7, xmm4, 3);
8357
8358 evpclmulqdq(xmm5, xmm4, xmm11, 0x01, Assembler::AVX_512bit);
8359 evpclmulqdq(xmm6, xmm4, xmm11, 0x10, Assembler::AVX_512bit);
8360 // Needed later in reduction loop
8361 movdqu(xmm10, Address(table, 1 * 16));
8362 vpternlogq(xmm1, 0x96, xmm2, xmm5, Assembler::AVX_512bit); // xor ABC
8363 vpternlogq(xmm1, 0x96, xmm6, xmm7, Assembler::AVX_512bit); // xor ABC
8364
8365 // Swap 1,0,3,2 - 01 00 11 10
8366 evshufi64x2(xmm8, xmm1, xmm1, 0x4e, Assembler::AVX_512bit);
8367 evpxorq(xmm8, xmm8, xmm1, Assembler::AVX_256bit);
8368 vextracti128(xmm5, xmm8, 1);
8369 evpxorq(xmm7, xmm5, xmm8, Assembler::AVX_128bit);
8370
8371 // instead of 128, we add 128 - 16 to the loop counter to save 1 instruction from the loop
8372 // instead of a cmp instruction, we use the negative flag with the jl instruction
8373 addl(len, 128 - 16);
8374 jcc(Assembler::less, L_final_reduction_for_128);
8375
8376 bind(L_16B_reduction_loop);
8377 vpclmulqdq(xmm8, xmm7, xmm10, 0x01);
8378 vpclmulqdq(xmm7, xmm7, xmm10, 0x10);
8379 vpxor(xmm7, xmm7, xmm8, Assembler::AVX_128bit);
8380 movdqu(xmm0, Address(buf, pos, Address::times_1, 0 * 16));
8381 vpxor(xmm7, xmm7, xmm0, Assembler::AVX_128bit);
8382 addl(pos, 16);
8383 subl(len, 16);
8384 jcc(Assembler::greaterEqual, L_16B_reduction_loop);
8385
8386 bind(L_final_reduction_for_128);
8387 addl(len, 16);
8388 jcc(Assembler::equal, L_128_done);
8389
8390 bind(L_get_last_two_xmms);
8391 movdqu(xmm2, xmm7);
8392 addl(pos, len);
8393 movdqu(xmm1, Address(buf, pos, Address::times_1, -16));
8394 subl(pos, len);
8395
8396 // get rid of the extra data that was loaded before
8397 // load the shift constant
8398 lea(rax, ExternalAddress(StubRoutines::x86::shuf_table_crc32_avx512_addr()));
8399 movdqu(xmm0, Address(rax, len));
8400 addl(rax, len);
8401
8402 vpshufb(xmm7, xmm7, xmm0, Assembler::AVX_128bit);
8403 //Change mask to 512
8404 vpxor(xmm0, xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_avx512_addr() + 2 * 16), Assembler::AVX_128bit, tmp2);
8405 vpshufb(xmm2, xmm2, xmm0, Assembler::AVX_128bit);
8406
8407 blendvpb(xmm2, xmm2, xmm1, xmm0, Assembler::AVX_128bit);
8408 vpclmulqdq(xmm8, xmm7, xmm10, 0x01);
8409 vpclmulqdq(xmm7, xmm7, xmm10, 0x10);
8410 vpxor(xmm7, xmm7, xmm8, Assembler::AVX_128bit);
8411 vpxor(xmm7, xmm7, xmm2, Assembler::AVX_128bit);
8412
8413 bind(L_128_done);
8414 // compute crc of a 128-bit value
8415 movdqu(xmm10, Address(table, 3 * 16));
8416 movdqu(xmm0, xmm7);
8417
8418 // 64b fold
8419 vpclmulqdq(xmm7, xmm7, xmm10, 0x0);
8420 vpsrldq(xmm0, xmm0, 0x8, Assembler::AVX_128bit);
8421 vpxor(xmm7, xmm7, xmm0, Assembler::AVX_128bit);
8422
8423 // 32b fold
8424 movdqu(xmm0, xmm7);
8425 vpslldq(xmm7, xmm7, 0x4, Assembler::AVX_128bit);
8426 vpclmulqdq(xmm7, xmm7, xmm10, 0x10);
8427 vpxor(xmm7, xmm7, xmm0, Assembler::AVX_128bit);
8428 jmp(L_barrett);
8429
8430 bind(L_less_than_256);
8431 kernel_crc32_avx512_256B(crc, buf, len, table, pos, tmp1, tmp2, L_barrett, L_16B_reduction_loop, L_get_last_two_xmms, L_128_done, L_cleanup);
8432
8433 //barrett reduction
8434 bind(L_barrett);
8435 vpand(xmm7, xmm7, ExternalAddress(StubRoutines::x86::crc_by128_masks_avx512_addr() + 1 * 16), Assembler::AVX_128bit, tmp2);
8436 movdqu(xmm1, xmm7);
8437 movdqu(xmm2, xmm7);
8438 movdqu(xmm10, Address(table, 4 * 16));
8439
8440 pclmulqdq(xmm7, xmm10, 0x0);
8441 pxor(xmm7, xmm2);
8442 vpand(xmm7, xmm7, ExternalAddress(StubRoutines::x86::crc_by128_masks_avx512_addr()), Assembler::AVX_128bit, tmp2);
8443 movdqu(xmm2, xmm7);
8444 pclmulqdq(xmm7, xmm10, 0x10);
8445 pxor(xmm7, xmm2);
8446 pxor(xmm7, xmm1);
8447 pextrd(crc, xmm7, 2);
8448
8449 bind(L_cleanup);
8450 addptr(rsp, 16 * 2 + 8);
8451 pop(r12);
8452 }
8453
8454 // S. Gueron / Information Processing Letters 112 (2012) 184
8455 // Algorithm 4: Computing carry-less multiplication using a precomputed lookup table.
8456 // Input: A 32 bit value B = [byte3, byte2, byte1, byte0].
8457 // Output: the 64-bit carry-less product of B * CONST
8458 void MacroAssembler::crc32c_ipl_alg4(Register in, uint32_t n,
8459 Register tmp1, Register tmp2, Register tmp3) {
8460 lea(tmp3, ExternalAddress(StubRoutines::crc32c_table_addr()));
8461 if (n > 0) {
8462 addq(tmp3, n * 256 * 8);
8463 }
8464 // Q1 = TABLEExt[n][B & 0xFF];
8465 movl(tmp1, in);
8466 andl(tmp1, 0x000000FF);
8467 shll(tmp1, 3);
8468 addq(tmp1, tmp3);
8469 movq(tmp1, Address(tmp1, 0));
8470
8471 // Q2 = TABLEExt[n][B >> 8 & 0xFF];
8472 movl(tmp2, in);
8473 shrl(tmp2, 8);
8474 andl(tmp2, 0x000000FF);
8475 shll(tmp2, 3);
8476 addq(tmp2, tmp3);
8477 movq(tmp2, Address(tmp2, 0));
8478
8479 shlq(tmp2, 8);
8480 xorq(tmp1, tmp2);
8481
8482 // Q3 = TABLEExt[n][B >> 16 & 0xFF];
8483 movl(tmp2, in);
8484 shrl(tmp2, 16);
8485 andl(tmp2, 0x000000FF);
8486 shll(tmp2, 3);
8487 addq(tmp2, tmp3);
8488 movq(tmp2, Address(tmp2, 0));
8489
8490 shlq(tmp2, 16);
8491 xorq(tmp1, tmp2);
8492
8493 // Q4 = TABLEExt[n][B >> 24 & 0xFF];
8494 shrl(in, 24);
8495 andl(in, 0x000000FF);
8496 shll(in, 3);
8497 addq(in, tmp3);
8498 movq(in, Address(in, 0));
8499
8500 shlq(in, 24);
8501 xorq(in, tmp1);
8502 // return Q1 ^ Q2 << 8 ^ Q3 << 16 ^ Q4 << 24;
8503 }
8504
8505 void MacroAssembler::crc32c_pclmulqdq(XMMRegister w_xtmp1,
8506 Register in_out,
8507 uint32_t const_or_pre_comp_const_index, bool is_pclmulqdq_supported,
8508 XMMRegister w_xtmp2,
8509 Register tmp1,
8510 Register n_tmp2, Register n_tmp3) {
8511 if (is_pclmulqdq_supported) {
8512 movdl(w_xtmp1, in_out); // modified blindly
8513
8514 movl(tmp1, const_or_pre_comp_const_index);
8515 movdl(w_xtmp2, tmp1);
8516 pclmulqdq(w_xtmp1, w_xtmp2, 0);
8517
8518 movdq(in_out, w_xtmp1);
8519 } else {
8520 crc32c_ipl_alg4(in_out, const_or_pre_comp_const_index, tmp1, n_tmp2, n_tmp3);
8521 }
8522 }
8523
8524 // Recombination Alternative 2: No bit-reflections
8525 // T1 = (CRC_A * U1) << 1
8526 // T2 = (CRC_B * U2) << 1
8527 // C1 = T1 >> 32
8528 // C2 = T2 >> 32
8529 // T1 = T1 & 0xFFFFFFFF
8530 // T2 = T2 & 0xFFFFFFFF
8531 // T1 = CRC32(0, T1)
8532 // T2 = CRC32(0, T2)
8533 // C1 = C1 ^ T1
8534 // C2 = C2 ^ T2
8535 // CRC = C1 ^ C2 ^ CRC_C
8536 void MacroAssembler::crc32c_rec_alt2(uint32_t const_or_pre_comp_const_index_u1, uint32_t const_or_pre_comp_const_index_u2, bool is_pclmulqdq_supported, Register in_out, Register in1, Register in2,
8537 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
8538 Register tmp1, Register tmp2,
8539 Register n_tmp3) {
8540 crc32c_pclmulqdq(w_xtmp1, in_out, const_or_pre_comp_const_index_u1, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3);
8541 crc32c_pclmulqdq(w_xtmp2, in1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3);
8542 shlq(in_out, 1);
8543 movl(tmp1, in_out);
8544 shrq(in_out, 32);
8545 xorl(tmp2, tmp2);
8546 crc32(tmp2, tmp1, 4);
8547 xorl(in_out, tmp2); // we don't care about upper 32 bit contents here
8548 shlq(in1, 1);
8549 movl(tmp1, in1);
8550 shrq(in1, 32);
8551 xorl(tmp2, tmp2);
8552 crc32(tmp2, tmp1, 4);
8553 xorl(in1, tmp2);
8554 xorl(in_out, in1);
8555 xorl(in_out, in2);
8556 }
8557
8558 // Set N to predefined value
8559 // Subtract from a length of a buffer
8560 // execute in a loop:
8561 // CRC_A = 0xFFFFFFFF, CRC_B = 0, CRC_C = 0
8562 // for i = 1 to N do
8563 // CRC_A = CRC32(CRC_A, A[i])
8564 // CRC_B = CRC32(CRC_B, B[i])
8565 // CRC_C = CRC32(CRC_C, C[i])
8566 // end for
8567 // Recombine
8568 void MacroAssembler::crc32c_proc_chunk(uint32_t size, uint32_t const_or_pre_comp_const_index_u1, uint32_t const_or_pre_comp_const_index_u2, bool is_pclmulqdq_supported,
8569 Register in_out1, Register in_out2, Register in_out3,
8570 Register tmp1, Register tmp2, Register tmp3,
8571 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
8572 Register tmp4, Register tmp5,
8573 Register n_tmp6) {
8574 Label L_processPartitions;
8575 Label L_processPartition;
8576 Label L_exit;
8577
8578 bind(L_processPartitions);
8579 cmpl(in_out1, 3 * size);
8580 jcc(Assembler::less, L_exit);
8581 xorl(tmp1, tmp1);
8582 xorl(tmp2, tmp2);
8583 movq(tmp3, in_out2);
8584 addq(tmp3, size);
8585
8586 bind(L_processPartition);
8587 crc32(in_out3, Address(in_out2, 0), 8);
8588 crc32(tmp1, Address(in_out2, size), 8);
8589 crc32(tmp2, Address(in_out2, size * 2), 8);
8590 addq(in_out2, 8);
8591 cmpq(in_out2, tmp3);
8592 jcc(Assembler::less, L_processPartition);
8593 crc32c_rec_alt2(const_or_pre_comp_const_index_u1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, in_out3, tmp1, tmp2,
8594 w_xtmp1, w_xtmp2, w_xtmp3,
8595 tmp4, tmp5,
8596 n_tmp6);
8597 addq(in_out2, 2 * size);
8598 subl(in_out1, 3 * size);
8599 jmp(L_processPartitions);
8600
8601 bind(L_exit);
8602 }
8603 #else
8604 void MacroAssembler::crc32c_ipl_alg4(Register in_out, uint32_t n,
8605 Register tmp1, Register tmp2, Register tmp3,
8606 XMMRegister xtmp1, XMMRegister xtmp2) {
8607 lea(tmp3, ExternalAddress(StubRoutines::crc32c_table_addr()));
8608 if (n > 0) {
8609 addl(tmp3, n * 256 * 8);
8610 }
8611 // Q1 = TABLEExt[n][B & 0xFF];
8612 movl(tmp1, in_out);
8613 andl(tmp1, 0x000000FF);
8614 shll(tmp1, 3);
8615 addl(tmp1, tmp3);
8616 movq(xtmp1, Address(tmp1, 0));
8617
8618 // Q2 = TABLEExt[n][B >> 8 & 0xFF];
8619 movl(tmp2, in_out);
8620 shrl(tmp2, 8);
8621 andl(tmp2, 0x000000FF);
8622 shll(tmp2, 3);
8623 addl(tmp2, tmp3);
8624 movq(xtmp2, Address(tmp2, 0));
8625
8626 psllq(xtmp2, 8);
8627 pxor(xtmp1, xtmp2);
8628
8629 // Q3 = TABLEExt[n][B >> 16 & 0xFF];
8630 movl(tmp2, in_out);
8631 shrl(tmp2, 16);
8632 andl(tmp2, 0x000000FF);
8633 shll(tmp2, 3);
8634 addl(tmp2, tmp3);
8635 movq(xtmp2, Address(tmp2, 0));
8636
8637 psllq(xtmp2, 16);
8638 pxor(xtmp1, xtmp2);
8639
8640 // Q4 = TABLEExt[n][B >> 24 & 0xFF];
8641 shrl(in_out, 24);
8642 andl(in_out, 0x000000FF);
8643 shll(in_out, 3);
8644 addl(in_out, tmp3);
8645 movq(xtmp2, Address(in_out, 0));
8646
8647 psllq(xtmp2, 24);
8648 pxor(xtmp1, xtmp2); // Result in CXMM
8649 // return Q1 ^ Q2 << 8 ^ Q3 << 16 ^ Q4 << 24;
8650 }
8651
8652 void MacroAssembler::crc32c_pclmulqdq(XMMRegister w_xtmp1,
8653 Register in_out,
8654 uint32_t const_or_pre_comp_const_index, bool is_pclmulqdq_supported,
8655 XMMRegister w_xtmp2,
8656 Register tmp1,
8657 Register n_tmp2, Register n_tmp3) {
8658 if (is_pclmulqdq_supported) {
8659 movdl(w_xtmp1, in_out);
8660
8661 movl(tmp1, const_or_pre_comp_const_index);
8662 movdl(w_xtmp2, tmp1);
8663 pclmulqdq(w_xtmp1, w_xtmp2, 0);
8664 // Keep result in XMM since GPR is 32 bit in length
8665 } else {
8666 crc32c_ipl_alg4(in_out, const_or_pre_comp_const_index, tmp1, n_tmp2, n_tmp3, w_xtmp1, w_xtmp2);
8667 }
8668 }
8669
8670 void MacroAssembler::crc32c_rec_alt2(uint32_t const_or_pre_comp_const_index_u1, uint32_t const_or_pre_comp_const_index_u2, bool is_pclmulqdq_supported, Register in_out, Register in1, Register in2,
8671 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
8672 Register tmp1, Register tmp2,
8673 Register n_tmp3) {
8674 crc32c_pclmulqdq(w_xtmp1, in_out, const_or_pre_comp_const_index_u1, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3);
8675 crc32c_pclmulqdq(w_xtmp2, in1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3);
8676
8677 psllq(w_xtmp1, 1);
8678 movdl(tmp1, w_xtmp1);
8679 psrlq(w_xtmp1, 32);
8680 movdl(in_out, w_xtmp1);
8681
8682 xorl(tmp2, tmp2);
8683 crc32(tmp2, tmp1, 4);
8684 xorl(in_out, tmp2);
8685
8686 psllq(w_xtmp2, 1);
8687 movdl(tmp1, w_xtmp2);
8688 psrlq(w_xtmp2, 32);
8689 movdl(in1, w_xtmp2);
8690
8691 xorl(tmp2, tmp2);
8692 crc32(tmp2, tmp1, 4);
8693 xorl(in1, tmp2);
8694 xorl(in_out, in1);
8695 xorl(in_out, in2);
8696 }
8697
8698 void MacroAssembler::crc32c_proc_chunk(uint32_t size, uint32_t const_or_pre_comp_const_index_u1, uint32_t const_or_pre_comp_const_index_u2, bool is_pclmulqdq_supported,
8699 Register in_out1, Register in_out2, Register in_out3,
8700 Register tmp1, Register tmp2, Register tmp3,
8701 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
8702 Register tmp4, Register tmp5,
8703 Register n_tmp6) {
8704 Label L_processPartitions;
8705 Label L_processPartition;
8706 Label L_exit;
8707
8708 bind(L_processPartitions);
8709 cmpl(in_out1, 3 * size);
8710 jcc(Assembler::less, L_exit);
8711 xorl(tmp1, tmp1);
8712 xorl(tmp2, tmp2);
8713 movl(tmp3, in_out2);
8714 addl(tmp3, size);
8715
8716 bind(L_processPartition);
8717 crc32(in_out3, Address(in_out2, 0), 4);
8718 crc32(tmp1, Address(in_out2, size), 4);
8719 crc32(tmp2, Address(in_out2, size*2), 4);
8720 crc32(in_out3, Address(in_out2, 0+4), 4);
8721 crc32(tmp1, Address(in_out2, size+4), 4);
8722 crc32(tmp2, Address(in_out2, size*2+4), 4);
8723 addl(in_out2, 8);
8724 cmpl(in_out2, tmp3);
8725 jcc(Assembler::less, L_processPartition);
8726
8727 push(tmp3);
8728 push(in_out1);
8729 push(in_out2);
8730 tmp4 = tmp3;
8731 tmp5 = in_out1;
8732 n_tmp6 = in_out2;
8733
8734 crc32c_rec_alt2(const_or_pre_comp_const_index_u1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, in_out3, tmp1, tmp2,
8735 w_xtmp1, w_xtmp2, w_xtmp3,
8736 tmp4, tmp5,
8737 n_tmp6);
8738
8739 pop(in_out2);
8740 pop(in_out1);
8741 pop(tmp3);
8742
8743 addl(in_out2, 2 * size);
8744 subl(in_out1, 3 * size);
8745 jmp(L_processPartitions);
8746
8747 bind(L_exit);
8748 }
8749 #endif //LP64
8750
8751 #ifdef _LP64
8752 // Algorithm 2: Pipelined usage of the CRC32 instruction.
8753 // Input: A buffer I of L bytes.
8754 // Output: the CRC32C value of the buffer.
8755 // Notations:
8756 // Write L = 24N + r, with N = floor (L/24).
8757 // r = L mod 24 (0 <= r < 24).
8758 // Consider I as the concatenation of A|B|C|R, where A, B, C, each,
8759 // N quadwords, and R consists of r bytes.
8760 // A[j] = I [8j+7:8j], j= 0, 1, ..., N-1
8761 // B[j] = I [N + 8j+7:N + 8j], j= 0, 1, ..., N-1
8762 // C[j] = I [2N + 8j+7:2N + 8j], j= 0, 1, ..., N-1
8763 // if r > 0 R[j] = I [3N +j], j= 0, 1, ...,r-1
8764 void MacroAssembler::crc32c_ipl_alg2_alt2(Register in_out, Register in1, Register in2,
8765 Register tmp1, Register tmp2, Register tmp3,
8766 Register tmp4, Register tmp5, Register tmp6,
8767 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
8768 bool is_pclmulqdq_supported) {
8769 uint32_t const_or_pre_comp_const_index[CRC32C_NUM_PRECOMPUTED_CONSTANTS];
8770 Label L_wordByWord;
8771 Label L_byteByByteProlog;
8772 Label L_byteByByte;
8773 Label L_exit;
8774
8775 if (is_pclmulqdq_supported ) {
8776 const_or_pre_comp_const_index[1] = *(uint32_t *)StubRoutines::_crc32c_table_addr;
8777 const_or_pre_comp_const_index[0] = *((uint32_t *)StubRoutines::_crc32c_table_addr+1);
8778
8779 const_or_pre_comp_const_index[3] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 2);
8780 const_or_pre_comp_const_index[2] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 3);
8781
8782 const_or_pre_comp_const_index[5] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 4);
8783 const_or_pre_comp_const_index[4] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 5);
8784 assert((CRC32C_NUM_PRECOMPUTED_CONSTANTS - 1 ) == 5, "Checking whether you declared all of the constants based on the number of \"chunks\"");
8785 } else {
8786 const_or_pre_comp_const_index[0] = 1;
8787 const_or_pre_comp_const_index[1] = 0;
8788
8789 const_or_pre_comp_const_index[2] = 3;
8790 const_or_pre_comp_const_index[3] = 2;
8791
8792 const_or_pre_comp_const_index[4] = 5;
8793 const_or_pre_comp_const_index[5] = 4;
8794 }
8795 crc32c_proc_chunk(CRC32C_HIGH, const_or_pre_comp_const_index[0], const_or_pre_comp_const_index[1], is_pclmulqdq_supported,
8796 in2, in1, in_out,
8797 tmp1, tmp2, tmp3,
8798 w_xtmp1, w_xtmp2, w_xtmp3,
8799 tmp4, tmp5,
8800 tmp6);
8801 crc32c_proc_chunk(CRC32C_MIDDLE, const_or_pre_comp_const_index[2], const_or_pre_comp_const_index[3], is_pclmulqdq_supported,
8802 in2, in1, in_out,
8803 tmp1, tmp2, tmp3,
8804 w_xtmp1, w_xtmp2, w_xtmp3,
8805 tmp4, tmp5,
8806 tmp6);
8807 crc32c_proc_chunk(CRC32C_LOW, const_or_pre_comp_const_index[4], const_or_pre_comp_const_index[5], is_pclmulqdq_supported,
8808 in2, in1, in_out,
8809 tmp1, tmp2, tmp3,
8810 w_xtmp1, w_xtmp2, w_xtmp3,
8811 tmp4, tmp5,
8812 tmp6);
8813 movl(tmp1, in2);
8814 andl(tmp1, 0x00000007);
8815 negl(tmp1);
8816 addl(tmp1, in2);
8817 addq(tmp1, in1);
8818
8819 cmpq(in1, tmp1);
8820 jccb(Assembler::greaterEqual, L_byteByByteProlog);
8821 align(16);
8822 BIND(L_wordByWord);
8823 crc32(in_out, Address(in1, 0), 8);
8824 addq(in1, 8);
8825 cmpq(in1, tmp1);
8826 jcc(Assembler::less, L_wordByWord);
8827
8828 BIND(L_byteByByteProlog);
8829 andl(in2, 0x00000007);
8830 movl(tmp2, 1);
8831
8832 cmpl(tmp2, in2);
8833 jccb(Assembler::greater, L_exit);
8834 BIND(L_byteByByte);
8835 crc32(in_out, Address(in1, 0), 1);
8836 incq(in1);
8837 incl(tmp2);
8838 cmpl(tmp2, in2);
8839 jcc(Assembler::lessEqual, L_byteByByte);
8840
8841 BIND(L_exit);
8842 }
8843 #else
8844 void MacroAssembler::crc32c_ipl_alg2_alt2(Register in_out, Register in1, Register in2,
8845 Register tmp1, Register tmp2, Register tmp3,
8846 Register tmp4, Register tmp5, Register tmp6,
8847 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
8848 bool is_pclmulqdq_supported) {
8849 uint32_t const_or_pre_comp_const_index[CRC32C_NUM_PRECOMPUTED_CONSTANTS];
8850 Label L_wordByWord;
8851 Label L_byteByByteProlog;
8852 Label L_byteByByte;
8853 Label L_exit;
8854
8855 if (is_pclmulqdq_supported) {
8856 const_or_pre_comp_const_index[1] = *(uint32_t *)StubRoutines::_crc32c_table_addr;
8857 const_or_pre_comp_const_index[0] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 1);
8858
8859 const_or_pre_comp_const_index[3] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 2);
8860 const_or_pre_comp_const_index[2] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 3);
8861
8862 const_or_pre_comp_const_index[5] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 4);
8863 const_or_pre_comp_const_index[4] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 5);
8864 } else {
8865 const_or_pre_comp_const_index[0] = 1;
8866 const_or_pre_comp_const_index[1] = 0;
8867
8868 const_or_pre_comp_const_index[2] = 3;
8869 const_or_pre_comp_const_index[3] = 2;
8870
8871 const_or_pre_comp_const_index[4] = 5;
8872 const_or_pre_comp_const_index[5] = 4;
8873 }
8874 crc32c_proc_chunk(CRC32C_HIGH, const_or_pre_comp_const_index[0], const_or_pre_comp_const_index[1], is_pclmulqdq_supported,
8875 in2, in1, in_out,
8876 tmp1, tmp2, tmp3,
8877 w_xtmp1, w_xtmp2, w_xtmp3,
8878 tmp4, tmp5,
8879 tmp6);
8880 crc32c_proc_chunk(CRC32C_MIDDLE, const_or_pre_comp_const_index[2], const_or_pre_comp_const_index[3], is_pclmulqdq_supported,
8881 in2, in1, in_out,
8882 tmp1, tmp2, tmp3,
8883 w_xtmp1, w_xtmp2, w_xtmp3,
8884 tmp4, tmp5,
8885 tmp6);
8886 crc32c_proc_chunk(CRC32C_LOW, const_or_pre_comp_const_index[4], const_or_pre_comp_const_index[5], is_pclmulqdq_supported,
8887 in2, in1, in_out,
8888 tmp1, tmp2, tmp3,
8889 w_xtmp1, w_xtmp2, w_xtmp3,
8890 tmp4, tmp5,
8891 tmp6);
8892 movl(tmp1, in2);
8893 andl(tmp1, 0x00000007);
8894 negl(tmp1);
8895 addl(tmp1, in2);
8896 addl(tmp1, in1);
8897
8898 BIND(L_wordByWord);
8899 cmpl(in1, tmp1);
8900 jcc(Assembler::greaterEqual, L_byteByByteProlog);
8901 crc32(in_out, Address(in1,0), 4);
8902 addl(in1, 4);
8903 jmp(L_wordByWord);
8904
8905 BIND(L_byteByByteProlog);
8906 andl(in2, 0x00000007);
8907 movl(tmp2, 1);
8908
8909 BIND(L_byteByByte);
8910 cmpl(tmp2, in2);
8911 jccb(Assembler::greater, L_exit);
8912 movb(tmp1, Address(in1, 0));
8913 crc32(in_out, tmp1, 1);
8914 incl(in1);
8915 incl(tmp2);
8916 jmp(L_byteByByte);
8917
8918 BIND(L_exit);
8919 }
8920 #endif // LP64
8921 #undef BIND
8922 #undef BLOCK_COMMENT
8923
8924 // Compress char[] array to byte[].
8925 // Intrinsic for java.lang.StringUTF16.compress(char[] src, int srcOff, byte[] dst, int dstOff, int len)
8926 // Return the array length if every element in array can be encoded,
8927 // otherwise, the index of first non-latin1 (> 0xff) character.
8928 // @IntrinsicCandidate
8929 // public static int compress(char[] src, int srcOff, byte[] dst, int dstOff, int len) {
8930 // for (int i = 0; i < len; i++) {
8931 // char c = src[srcOff];
8932 // if (c > 0xff) {
8933 // return i; // return index of non-latin1 char
8934 // }
8935 // dst[dstOff] = (byte)c;
8936 // srcOff++;
8937 // dstOff++;
8938 // }
8939 // return len;
8940 // }
8941 void MacroAssembler::char_array_compress(Register src, Register dst, Register len,
8942 XMMRegister tmp1Reg, XMMRegister tmp2Reg,
8943 XMMRegister tmp3Reg, XMMRegister tmp4Reg,
8944 Register tmp5, Register result, KRegister mask1, KRegister mask2) {
8945 Label copy_chars_loop, done, reset_sp, copy_tail;
8946
8947 // rsi: src
8948 // rdi: dst
8949 // rdx: len
8950 // rcx: tmp5
8951 // rax: result
8952
8953 // rsi holds start addr of source char[] to be compressed
8954 // rdi holds start addr of destination byte[]
8955 // rdx holds length
8956
8957 assert(len != result, "");
8958
8959 // save length for return
8960 movl(result, len);
8961
8962 if ((AVX3Threshold == 0) && (UseAVX > 2) && // AVX512
8963 VM_Version::supports_avx512vlbw() &&
8964 VM_Version::supports_bmi2()) {
8965
8966 Label copy_32_loop, copy_loop_tail, below_threshold, reset_for_copy_tail;
8967
8968 // alignment
8969 Label post_alignment;
8970
8971 // if length of the string is less than 32, handle it the old fashioned way
8972 testl(len, -32);
8973 jcc(Assembler::zero, below_threshold);
8974
8975 // First check whether a character is compressible ( <= 0xFF).
8976 // Create mask to test for Unicode chars inside zmm vector
8977 movl(tmp5, 0x00FF);
8978 evpbroadcastw(tmp2Reg, tmp5, Assembler::AVX_512bit);
8979
8980 testl(len, -64);
8981 jccb(Assembler::zero, post_alignment);
8982
8983 movl(tmp5, dst);
8984 andl(tmp5, (32 - 1));
8985 negl(tmp5);
8986 andl(tmp5, (32 - 1));
8987
8988 // bail out when there is nothing to be done
8989 testl(tmp5, 0xFFFFFFFF);
8990 jccb(Assembler::zero, post_alignment);
8991
8992 // ~(~0 << len), where len is the # of remaining elements to process
8993 movl(len, 0xFFFFFFFF);
8994 shlxl(len, len, tmp5);
8995 notl(len);
8996 kmovdl(mask2, len);
8997 movl(len, result);
8998
8999 evmovdquw(tmp1Reg, mask2, Address(src, 0), /*merge*/ false, Assembler::AVX_512bit);
9000 evpcmpw(mask1, mask2, tmp1Reg, tmp2Reg, Assembler::le, /*signed*/ false, Assembler::AVX_512bit);
9001 ktestd(mask1, mask2);
9002 jcc(Assembler::carryClear, copy_tail);
9003
9004 evpmovwb(Address(dst, 0), mask2, tmp1Reg, Assembler::AVX_512bit);
9005
9006 addptr(src, tmp5);
9007 addptr(src, tmp5);
9008 addptr(dst, tmp5);
9009 subl(len, tmp5);
9010
9011 bind(post_alignment);
9012 // end of alignment
9013
9014 movl(tmp5, len);
9015 andl(tmp5, (32 - 1)); // tail count (in chars)
9016 andl(len, ~(32 - 1)); // vector count (in chars)
9017 jccb(Assembler::zero, copy_loop_tail);
9018
9019 lea(src, Address(src, len, Address::times_2));
9020 lea(dst, Address(dst, len, Address::times_1));
9021 negptr(len);
9022
9023 bind(copy_32_loop);
9024 evmovdquw(tmp1Reg, Address(src, len, Address::times_2), Assembler::AVX_512bit);
9025 evpcmpuw(mask1, tmp1Reg, tmp2Reg, Assembler::le, Assembler::AVX_512bit);
9026 kortestdl(mask1, mask1);
9027 jccb(Assembler::carryClear, reset_for_copy_tail);
9028
9029 // All elements in current processed chunk are valid candidates for
9030 // compression. Write a truncated byte elements to the memory.
9031 evpmovwb(Address(dst, len, Address::times_1), tmp1Reg, Assembler::AVX_512bit);
9032 addptr(len, 32);
9033 jccb(Assembler::notZero, copy_32_loop);
9034
9035 bind(copy_loop_tail);
9036 // bail out when there is nothing to be done
9037 testl(tmp5, 0xFFFFFFFF);
9038 jcc(Assembler::zero, done);
9039
9040 movl(len, tmp5);
9041
9042 // ~(~0 << len), where len is the # of remaining elements to process
9043 movl(tmp5, 0xFFFFFFFF);
9044 shlxl(tmp5, tmp5, len);
9045 notl(tmp5);
9046
9047 kmovdl(mask2, tmp5);
9048
9049 evmovdquw(tmp1Reg, mask2, Address(src, 0), /*merge*/ false, Assembler::AVX_512bit);
9050 evpcmpw(mask1, mask2, tmp1Reg, tmp2Reg, Assembler::le, /*signed*/ false, Assembler::AVX_512bit);
9051 ktestd(mask1, mask2);
9052 jcc(Assembler::carryClear, copy_tail);
9053
9054 evpmovwb(Address(dst, 0), mask2, tmp1Reg, Assembler::AVX_512bit);
9055 jmp(done);
9056
9057 bind(reset_for_copy_tail);
9058 lea(src, Address(src, tmp5, Address::times_2));
9059 lea(dst, Address(dst, tmp5, Address::times_1));
9060 subptr(len, tmp5);
9061 jmp(copy_chars_loop);
9062
9063 bind(below_threshold);
9064 }
9065
9066 if (UseSSE42Intrinsics) {
9067 Label copy_32_loop, copy_16, copy_tail_sse, reset_for_copy_tail;
9068
9069 // vectored compression
9070 testl(len, 0xfffffff8);
9071 jcc(Assembler::zero, copy_tail);
9072
9073 movl(tmp5, 0xff00ff00); // create mask to test for Unicode chars in vectors
9074 movdl(tmp1Reg, tmp5);
9075 pshufd(tmp1Reg, tmp1Reg, 0); // store Unicode mask in tmp1Reg
9076
9077 andl(len, 0xfffffff0);
9078 jccb(Assembler::zero, copy_16);
9079
9080 // compress 16 chars per iter
9081 pxor(tmp4Reg, tmp4Reg);
9082
9083 lea(src, Address(src, len, Address::times_2));
9084 lea(dst, Address(dst, len, Address::times_1));
9085 negptr(len);
9086
9087 bind(copy_32_loop);
9088 movdqu(tmp2Reg, Address(src, len, Address::times_2)); // load 1st 8 characters
9089 por(tmp4Reg, tmp2Reg);
9090 movdqu(tmp3Reg, Address(src, len, Address::times_2, 16)); // load next 8 characters
9091 por(tmp4Reg, tmp3Reg);
9092 ptest(tmp4Reg, tmp1Reg); // check for Unicode chars in next vector
9093 jccb(Assembler::notZero, reset_for_copy_tail);
9094 packuswb(tmp2Reg, tmp3Reg); // only ASCII chars; compress each to 1 byte
9095 movdqu(Address(dst, len, Address::times_1), tmp2Reg);
9096 addptr(len, 16);
9097 jccb(Assembler::notZero, copy_32_loop);
9098
9099 // compress next vector of 8 chars (if any)
9100 bind(copy_16);
9101 // len = 0
9102 testl(result, 0x00000008); // check if there's a block of 8 chars to compress
9103 jccb(Assembler::zero, copy_tail_sse);
9104
9105 pxor(tmp3Reg, tmp3Reg);
9106
9107 movdqu(tmp2Reg, Address(src, 0));
9108 ptest(tmp2Reg, tmp1Reg); // check for Unicode chars in vector
9109 jccb(Assembler::notZero, reset_for_copy_tail);
9110 packuswb(tmp2Reg, tmp3Reg); // only LATIN1 chars; compress each to 1 byte
9111 movq(Address(dst, 0), tmp2Reg);
9112 addptr(src, 16);
9113 addptr(dst, 8);
9114 jmpb(copy_tail_sse);
9115
9116 bind(reset_for_copy_tail);
9117 movl(tmp5, result);
9118 andl(tmp5, 0x0000000f);
9119 lea(src, Address(src, tmp5, Address::times_2));
9120 lea(dst, Address(dst, tmp5, Address::times_1));
9121 subptr(len, tmp5);
9122 jmpb(copy_chars_loop);
9123
9124 bind(copy_tail_sse);
9125 movl(len, result);
9126 andl(len, 0x00000007); // tail count (in chars)
9127 }
9128 // compress 1 char per iter
9129 bind(copy_tail);
9130 testl(len, len);
9131 jccb(Assembler::zero, done);
9132 lea(src, Address(src, len, Address::times_2));
9133 lea(dst, Address(dst, len, Address::times_1));
9134 negptr(len);
9135
9136 bind(copy_chars_loop);
9137 load_unsigned_short(tmp5, Address(src, len, Address::times_2));
9138 testl(tmp5, 0xff00); // check if Unicode char
9139 jccb(Assembler::notZero, reset_sp);
9140 movb(Address(dst, len, Address::times_1), tmp5); // ASCII char; compress to 1 byte
9141 increment(len);
9142 jccb(Assembler::notZero, copy_chars_loop);
9143
9144 // add len then return (len will be zero if compress succeeded, otherwise negative)
9145 bind(reset_sp);
9146 addl(result, len);
9147
9148 bind(done);
9149 }
9150
9151 // Inflate byte[] array to char[].
9152 // ..\jdk\src\java.base\share\classes\java\lang\StringLatin1.java
9153 // @IntrinsicCandidate
9154 // private static void inflate(byte[] src, int srcOff, char[] dst, int dstOff, int len) {
9155 // for (int i = 0; i < len; i++) {
9156 // dst[dstOff++] = (char)(src[srcOff++] & 0xff);
9157 // }
9158 // }
9159 void MacroAssembler::byte_array_inflate(Register src, Register dst, Register len,
9160 XMMRegister tmp1, Register tmp2, KRegister mask) {
9161 Label copy_chars_loop, done, below_threshold, avx3_threshold;
9162 // rsi: src
9163 // rdi: dst
9164 // rdx: len
9165 // rcx: tmp2
9166
9167 // rsi holds start addr of source byte[] to be inflated
9168 // rdi holds start addr of destination char[]
9169 // rdx holds length
9170 assert_different_registers(src, dst, len, tmp2);
9171 movl(tmp2, len);
9172 if ((UseAVX > 2) && // AVX512
9173 VM_Version::supports_avx512vlbw() &&
9174 VM_Version::supports_bmi2()) {
9175
9176 Label copy_32_loop, copy_tail;
9177 Register tmp3_aliased = len;
9178
9179 // if length of the string is less than 16, handle it in an old fashioned way
9180 testl(len, -16);
9181 jcc(Assembler::zero, below_threshold);
9182
9183 testl(len, -1 * AVX3Threshold);
9184 jcc(Assembler::zero, avx3_threshold);
9185
9186 // In order to use only one arithmetic operation for the main loop we use
9187 // this pre-calculation
9188 andl(tmp2, (32 - 1)); // tail count (in chars), 32 element wide loop
9189 andl(len, -32); // vector count
9190 jccb(Assembler::zero, copy_tail);
9191
9192 lea(src, Address(src, len, Address::times_1));
9193 lea(dst, Address(dst, len, Address::times_2));
9194 negptr(len);
9195
9196
9197 // inflate 32 chars per iter
9198 bind(copy_32_loop);
9199 vpmovzxbw(tmp1, Address(src, len, Address::times_1), Assembler::AVX_512bit);
9200 evmovdquw(Address(dst, len, Address::times_2), tmp1, Assembler::AVX_512bit);
9201 addptr(len, 32);
9202 jcc(Assembler::notZero, copy_32_loop);
9203
9204 bind(copy_tail);
9205 // bail out when there is nothing to be done
9206 testl(tmp2, -1); // we don't destroy the contents of tmp2 here
9207 jcc(Assembler::zero, done);
9208
9209 // ~(~0 << length), where length is the # of remaining elements to process
9210 movl(tmp3_aliased, -1);
9211 shlxl(tmp3_aliased, tmp3_aliased, tmp2);
9212 notl(tmp3_aliased);
9213 kmovdl(mask, tmp3_aliased);
9214 evpmovzxbw(tmp1, mask, Address(src, 0), Assembler::AVX_512bit);
9215 evmovdquw(Address(dst, 0), mask, tmp1, /*merge*/ true, Assembler::AVX_512bit);
9216
9217 jmp(done);
9218 bind(avx3_threshold);
9219 }
9220 if (UseSSE42Intrinsics) {
9221 Label copy_16_loop, copy_8_loop, copy_bytes, copy_new_tail, copy_tail;
9222
9223 if (UseAVX > 1) {
9224 andl(tmp2, (16 - 1));
9225 andl(len, -16);
9226 jccb(Assembler::zero, copy_new_tail);
9227 } else {
9228 andl(tmp2, 0x00000007); // tail count (in chars)
9229 andl(len, 0xfffffff8); // vector count (in chars)
9230 jccb(Assembler::zero, copy_tail);
9231 }
9232
9233 // vectored inflation
9234 lea(src, Address(src, len, Address::times_1));
9235 lea(dst, Address(dst, len, Address::times_2));
9236 negptr(len);
9237
9238 if (UseAVX > 1) {
9239 bind(copy_16_loop);
9240 vpmovzxbw(tmp1, Address(src, len, Address::times_1), Assembler::AVX_256bit);
9241 vmovdqu(Address(dst, len, Address::times_2), tmp1);
9242 addptr(len, 16);
9243 jcc(Assembler::notZero, copy_16_loop);
9244
9245 bind(below_threshold);
9246 bind(copy_new_tail);
9247 movl(len, tmp2);
9248 andl(tmp2, 0x00000007);
9249 andl(len, 0xFFFFFFF8);
9250 jccb(Assembler::zero, copy_tail);
9251
9252 pmovzxbw(tmp1, Address(src, 0));
9253 movdqu(Address(dst, 0), tmp1);
9254 addptr(src, 8);
9255 addptr(dst, 2 * 8);
9256
9257 jmp(copy_tail, true);
9258 }
9259
9260 // inflate 8 chars per iter
9261 bind(copy_8_loop);
9262 pmovzxbw(tmp1, Address(src, len, Address::times_1)); // unpack to 8 words
9263 movdqu(Address(dst, len, Address::times_2), tmp1);
9264 addptr(len, 8);
9265 jcc(Assembler::notZero, copy_8_loop);
9266
9267 bind(copy_tail);
9268 movl(len, tmp2);
9269
9270 cmpl(len, 4);
9271 jccb(Assembler::less, copy_bytes);
9272
9273 movdl(tmp1, Address(src, 0)); // load 4 byte chars
9274 pmovzxbw(tmp1, tmp1);
9275 movq(Address(dst, 0), tmp1);
9276 subptr(len, 4);
9277 addptr(src, 4);
9278 addptr(dst, 8);
9279
9280 bind(copy_bytes);
9281 } else {
9282 bind(below_threshold);
9283 }
9284
9285 testl(len, len);
9286 jccb(Assembler::zero, done);
9287 lea(src, Address(src, len, Address::times_1));
9288 lea(dst, Address(dst, len, Address::times_2));
9289 negptr(len);
9290
9291 // inflate 1 char per iter
9292 bind(copy_chars_loop);
9293 load_unsigned_byte(tmp2, Address(src, len, Address::times_1)); // load byte char
9294 movw(Address(dst, len, Address::times_2), tmp2); // inflate byte char to word
9295 increment(len);
9296 jcc(Assembler::notZero, copy_chars_loop);
9297
9298 bind(done);
9299 }
9300
9301
9302 void MacroAssembler::evmovdqu(BasicType type, KRegister kmask, XMMRegister dst, Address src, bool merge, int vector_len) {
9303 switch(type) {
9304 case T_BYTE:
9305 case T_BOOLEAN:
9306 evmovdqub(dst, kmask, src, merge, vector_len);
9307 break;
9308 case T_CHAR:
9309 case T_SHORT:
9310 evmovdquw(dst, kmask, src, merge, vector_len);
9311 break;
9312 case T_INT:
9313 case T_FLOAT:
9314 evmovdqul(dst, kmask, src, merge, vector_len);
9315 break;
9316 case T_LONG:
9317 case T_DOUBLE:
9318 evmovdquq(dst, kmask, src, merge, vector_len);
9319 break;
9320 default:
9321 fatal("Unexpected type argument %s", type2name(type));
9322 break;
9323 }
9324 }
9325
9326 void MacroAssembler::evmovdqu(BasicType type, KRegister kmask, Address dst, XMMRegister src, bool merge, int vector_len) {
9327 switch(type) {
9328 case T_BYTE:
9329 case T_BOOLEAN:
9330 evmovdqub(dst, kmask, src, merge, vector_len);
9331 break;
9332 case T_CHAR:
9333 case T_SHORT:
9334 evmovdquw(dst, kmask, src, merge, vector_len);
9335 break;
9336 case T_INT:
9337 case T_FLOAT:
9338 evmovdqul(dst, kmask, src, merge, vector_len);
9339 break;
9340 case T_LONG:
9341 case T_DOUBLE:
9342 evmovdquq(dst, kmask, src, merge, vector_len);
9343 break;
9344 default:
9345 fatal("Unexpected type argument %s", type2name(type));
9346 break;
9347 }
9348 }
9349
9350 void MacroAssembler::knot(uint masklen, KRegister dst, KRegister src, KRegister ktmp, Register rtmp) {
9351 switch(masklen) {
9352 case 2:
9353 knotbl(dst, src);
9354 movl(rtmp, 3);
9355 kmovbl(ktmp, rtmp);
9356 kandbl(dst, ktmp, dst);
9357 break;
9358 case 4:
9359 knotbl(dst, src);
9360 movl(rtmp, 15);
9361 kmovbl(ktmp, rtmp);
9362 kandbl(dst, ktmp, dst);
9363 break;
9364 case 8:
9365 knotbl(dst, src);
9366 break;
9367 case 16:
9368 knotwl(dst, src);
9369 break;
9370 case 32:
9371 knotdl(dst, src);
9372 break;
9373 case 64:
9374 knotql(dst, src);
9375 break;
9376 default:
9377 fatal("Unexpected vector length %d", masklen);
9378 break;
9379 }
9380 }
9381
9382 void MacroAssembler::kand(BasicType type, KRegister dst, KRegister src1, KRegister src2) {
9383 switch(type) {
9384 case T_BOOLEAN:
9385 case T_BYTE:
9386 kandbl(dst, src1, src2);
9387 break;
9388 case T_CHAR:
9389 case T_SHORT:
9390 kandwl(dst, src1, src2);
9391 break;
9392 case T_INT:
9393 case T_FLOAT:
9394 kanddl(dst, src1, src2);
9395 break;
9396 case T_LONG:
9397 case T_DOUBLE:
9398 kandql(dst, src1, src2);
9399 break;
9400 default:
9401 fatal("Unexpected type argument %s", type2name(type));
9402 break;
9403 }
9404 }
9405
9406 void MacroAssembler::kor(BasicType type, KRegister dst, KRegister src1, KRegister src2) {
9407 switch(type) {
9408 case T_BOOLEAN:
9409 case T_BYTE:
9410 korbl(dst, src1, src2);
9411 break;
9412 case T_CHAR:
9413 case T_SHORT:
9414 korwl(dst, src1, src2);
9415 break;
9416 case T_INT:
9417 case T_FLOAT:
9418 kordl(dst, src1, src2);
9419 break;
9420 case T_LONG:
9421 case T_DOUBLE:
9422 korql(dst, src1, src2);
9423 break;
9424 default:
9425 fatal("Unexpected type argument %s", type2name(type));
9426 break;
9427 }
9428 }
9429
9430 void MacroAssembler::kxor(BasicType type, KRegister dst, KRegister src1, KRegister src2) {
9431 switch(type) {
9432 case T_BOOLEAN:
9433 case T_BYTE:
9434 kxorbl(dst, src1, src2);
9435 break;
9436 case T_CHAR:
9437 case T_SHORT:
9438 kxorwl(dst, src1, src2);
9439 break;
9440 case T_INT:
9441 case T_FLOAT:
9442 kxordl(dst, src1, src2);
9443 break;
9444 case T_LONG:
9445 case T_DOUBLE:
9446 kxorql(dst, src1, src2);
9447 break;
9448 default:
9449 fatal("Unexpected type argument %s", type2name(type));
9450 break;
9451 }
9452 }
9453
9454 void MacroAssembler::evperm(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
9455 switch(type) {
9456 case T_BOOLEAN:
9457 case T_BYTE:
9458 evpermb(dst, mask, nds, src, merge, vector_len); break;
9459 case T_CHAR:
9460 case T_SHORT:
9461 evpermw(dst, mask, nds, src, merge, vector_len); break;
9462 case T_INT:
9463 case T_FLOAT:
9464 evpermd(dst, mask, nds, src, merge, vector_len); break;
9465 case T_LONG:
9466 case T_DOUBLE:
9467 evpermq(dst, mask, nds, src, merge, vector_len); break;
9468 default:
9469 fatal("Unexpected type argument %s", type2name(type)); break;
9470 }
9471 }
9472
9473 void MacroAssembler::evperm(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
9474 switch(type) {
9475 case T_BOOLEAN:
9476 case T_BYTE:
9477 evpermb(dst, mask, nds, src, merge, vector_len); break;
9478 case T_CHAR:
9479 case T_SHORT:
9480 evpermw(dst, mask, nds, src, merge, vector_len); break;
9481 case T_INT:
9482 case T_FLOAT:
9483 evpermd(dst, mask, nds, src, merge, vector_len); break;
9484 case T_LONG:
9485 case T_DOUBLE:
9486 evpermq(dst, mask, nds, src, merge, vector_len); break;
9487 default:
9488 fatal("Unexpected type argument %s", type2name(type)); break;
9489 }
9490 }
9491
9492 void MacroAssembler::evpmins(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
9493 switch(type) {
9494 case T_BYTE:
9495 evpminsb(dst, mask, nds, src, merge, vector_len); break;
9496 case T_SHORT:
9497 evpminsw(dst, mask, nds, src, merge, vector_len); break;
9498 case T_INT:
9499 evpminsd(dst, mask, nds, src, merge, vector_len); break;
9500 case T_LONG:
9501 evpminsq(dst, mask, nds, src, merge, vector_len); break;
9502 default:
9503 fatal("Unexpected type argument %s", type2name(type)); break;
9504 }
9505 }
9506
9507 void MacroAssembler::evpmaxs(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
9508 switch(type) {
9509 case T_BYTE:
9510 evpmaxsb(dst, mask, nds, src, merge, vector_len); break;
9511 case T_SHORT:
9512 evpmaxsw(dst, mask, nds, src, merge, vector_len); break;
9513 case T_INT:
9514 evpmaxsd(dst, mask, nds, src, merge, vector_len); break;
9515 case T_LONG:
9516 evpmaxsq(dst, mask, nds, src, merge, vector_len); break;
9517 default:
9518 fatal("Unexpected type argument %s", type2name(type)); break;
9519 }
9520 }
9521
9522 void MacroAssembler::evpmins(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
9523 switch(type) {
9524 case T_BYTE:
9525 evpminsb(dst, mask, nds, src, merge, vector_len); break;
9526 case T_SHORT:
9527 evpminsw(dst, mask, nds, src, merge, vector_len); break;
9528 case T_INT:
9529 evpminsd(dst, mask, nds, src, merge, vector_len); break;
9530 case T_LONG:
9531 evpminsq(dst, mask, nds, src, merge, vector_len); break;
9532 default:
9533 fatal("Unexpected type argument %s", type2name(type)); break;
9534 }
9535 }
9536
9537 void MacroAssembler::evpmaxs(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
9538 switch(type) {
9539 case T_BYTE:
9540 evpmaxsb(dst, mask, nds, src, merge, vector_len); break;
9541 case T_SHORT:
9542 evpmaxsw(dst, mask, nds, src, merge, vector_len); break;
9543 case T_INT:
9544 evpmaxsd(dst, mask, nds, src, merge, vector_len); break;
9545 case T_LONG:
9546 evpmaxsq(dst, mask, nds, src, merge, vector_len); break;
9547 default:
9548 fatal("Unexpected type argument %s", type2name(type)); break;
9549 }
9550 }
9551
9552 void MacroAssembler::evxor(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
9553 switch(type) {
9554 case T_INT:
9555 evpxord(dst, mask, nds, src, merge, vector_len); break;
9556 case T_LONG:
9557 evpxorq(dst, mask, nds, src, merge, vector_len); break;
9558 default:
9559 fatal("Unexpected type argument %s", type2name(type)); break;
9560 }
9561 }
9562
9563 void MacroAssembler::evxor(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
9564 switch(type) {
9565 case T_INT:
9566 evpxord(dst, mask, nds, src, merge, vector_len); break;
9567 case T_LONG:
9568 evpxorq(dst, mask, nds, src, merge, vector_len); break;
9569 default:
9570 fatal("Unexpected type argument %s", type2name(type)); break;
9571 }
9572 }
9573
9574 void MacroAssembler::evor(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
9575 switch(type) {
9576 case T_INT:
9577 Assembler::evpord(dst, mask, nds, src, merge, vector_len); break;
9578 case T_LONG:
9579 evporq(dst, mask, nds, src, merge, vector_len); break;
9580 default:
9581 fatal("Unexpected type argument %s", type2name(type)); break;
9582 }
9583 }
9584
9585 void MacroAssembler::evor(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
9586 switch(type) {
9587 case T_INT:
9588 Assembler::evpord(dst, mask, nds, src, merge, vector_len); break;
9589 case T_LONG:
9590 evporq(dst, mask, nds, src, merge, vector_len); break;
9591 default:
9592 fatal("Unexpected type argument %s", type2name(type)); break;
9593 }
9594 }
9595
9596 void MacroAssembler::evand(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
9597 switch(type) {
9598 case T_INT:
9599 evpandd(dst, mask, nds, src, merge, vector_len); break;
9600 case T_LONG:
9601 evpandq(dst, mask, nds, src, merge, vector_len); break;
9602 default:
9603 fatal("Unexpected type argument %s", type2name(type)); break;
9604 }
9605 }
9606
9607 void MacroAssembler::evand(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
9608 switch(type) {
9609 case T_INT:
9610 evpandd(dst, mask, nds, src, merge, vector_len); break;
9611 case T_LONG:
9612 evpandq(dst, mask, nds, src, merge, vector_len); break;
9613 default:
9614 fatal("Unexpected type argument %s", type2name(type)); break;
9615 }
9616 }
9617
9618 void MacroAssembler::kortest(uint masklen, KRegister src1, KRegister src2) {
9619 switch(masklen) {
9620 case 8:
9621 kortestbl(src1, src2);
9622 break;
9623 case 16:
9624 kortestwl(src1, src2);
9625 break;
9626 case 32:
9627 kortestdl(src1, src2);
9628 break;
9629 case 64:
9630 kortestql(src1, src2);
9631 break;
9632 default:
9633 fatal("Unexpected mask length %d", masklen);
9634 break;
9635 }
9636 }
9637
9638
9639 void MacroAssembler::ktest(uint masklen, KRegister src1, KRegister src2) {
9640 switch(masklen) {
9641 case 8:
9642 ktestbl(src1, src2);
9643 break;
9644 case 16:
9645 ktestwl(src1, src2);
9646 break;
9647 case 32:
9648 ktestdl(src1, src2);
9649 break;
9650 case 64:
9651 ktestql(src1, src2);
9652 break;
9653 default:
9654 fatal("Unexpected mask length %d", masklen);
9655 break;
9656 }
9657 }
9658
9659 void MacroAssembler::evrold(BasicType type, XMMRegister dst, KRegister mask, XMMRegister src, int shift, bool merge, int vlen_enc) {
9660 switch(type) {
9661 case T_INT:
9662 evprold(dst, mask, src, shift, merge, vlen_enc); break;
9663 case T_LONG:
9664 evprolq(dst, mask, src, shift, merge, vlen_enc); break;
9665 default:
9666 fatal("Unexpected type argument %s", type2name(type)); break;
9667 break;
9668 }
9669 }
9670
9671 void MacroAssembler::evrord(BasicType type, XMMRegister dst, KRegister mask, XMMRegister src, int shift, bool merge, int vlen_enc) {
9672 switch(type) {
9673 case T_INT:
9674 evprord(dst, mask, src, shift, merge, vlen_enc); break;
9675 case T_LONG:
9676 evprorq(dst, mask, src, shift, merge, vlen_enc); break;
9677 default:
9678 fatal("Unexpected type argument %s", type2name(type)); break;
9679 }
9680 }
9681
9682 void MacroAssembler::evrold(BasicType type, XMMRegister dst, KRegister mask, XMMRegister src1, XMMRegister src2, bool merge, int vlen_enc) {
9683 switch(type) {
9684 case T_INT:
9685 evprolvd(dst, mask, src1, src2, merge, vlen_enc); break;
9686 case T_LONG:
9687 evprolvq(dst, mask, src1, src2, merge, vlen_enc); break;
9688 default:
9689 fatal("Unexpected type argument %s", type2name(type)); break;
9690 }
9691 }
9692
9693 void MacroAssembler::evrord(BasicType type, XMMRegister dst, KRegister mask, XMMRegister src1, XMMRegister src2, bool merge, int vlen_enc) {
9694 switch(type) {
9695 case T_INT:
9696 evprorvd(dst, mask, src1, src2, merge, vlen_enc); break;
9697 case T_LONG:
9698 evprorvq(dst, mask, src1, src2, merge, vlen_enc); break;
9699 default:
9700 fatal("Unexpected type argument %s", type2name(type)); break;
9701 }
9702 }
9703
9704 void MacroAssembler::evpandq(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
9705 assert(rscratch != noreg || always_reachable(src), "missing");
9706
9707 if (reachable(src)) {
9708 evpandq(dst, nds, as_Address(src), vector_len);
9709 } else {
9710 lea(rscratch, src);
9711 evpandq(dst, nds, Address(rscratch, 0), vector_len);
9712 }
9713 }
9714
9715 void MacroAssembler::evpaddq(XMMRegister dst, KRegister mask, XMMRegister nds, AddressLiteral src, bool merge, int vector_len, Register rscratch) {
9716 assert(rscratch != noreg || always_reachable(src), "missing");
9717
9718 if (reachable(src)) {
9719 Assembler::evpaddq(dst, mask, nds, as_Address(src), merge, vector_len);
9720 } else {
9721 lea(rscratch, src);
9722 Assembler::evpaddq(dst, mask, nds, Address(rscratch, 0), merge, vector_len);
9723 }
9724 }
9725
9726 void MacroAssembler::evporq(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
9727 assert(rscratch != noreg || always_reachable(src), "missing");
9728
9729 if (reachable(src)) {
9730 evporq(dst, nds, as_Address(src), vector_len);
9731 } else {
9732 lea(rscratch, src);
9733 evporq(dst, nds, Address(rscratch, 0), vector_len);
9734 }
9735 }
9736
9737 void MacroAssembler::vpshufb(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
9738 assert(rscratch != noreg || always_reachable(src), "missing");
9739
9740 if (reachable(src)) {
9741 vpshufb(dst, nds, as_Address(src), vector_len);
9742 } else {
9743 lea(rscratch, src);
9744 vpshufb(dst, nds, Address(rscratch, 0), vector_len);
9745 }
9746 }
9747
9748 void MacroAssembler::vpor(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
9749 assert(rscratch != noreg || always_reachable(src), "missing");
9750
9751 if (reachable(src)) {
9752 Assembler::vpor(dst, nds, as_Address(src), vector_len);
9753 } else {
9754 lea(rscratch, src);
9755 Assembler::vpor(dst, nds, Address(rscratch, 0), vector_len);
9756 }
9757 }
9758
9759 void MacroAssembler::vpternlogq(XMMRegister dst, int imm8, XMMRegister src2, AddressLiteral src3, int vector_len, Register rscratch) {
9760 assert(rscratch != noreg || always_reachable(src3), "missing");
9761
9762 if (reachable(src3)) {
9763 vpternlogq(dst, imm8, src2, as_Address(src3), vector_len);
9764 } else {
9765 lea(rscratch, src3);
9766 vpternlogq(dst, imm8, src2, Address(rscratch, 0), vector_len);
9767 }
9768 }
9769
9770 #if COMPILER2_OR_JVMCI
9771
9772 void MacroAssembler::fill_masked(BasicType bt, Address dst, XMMRegister xmm, KRegister mask,
9773 Register length, Register temp, int vec_enc) {
9774 // Computing mask for predicated vector store.
9775 movptr(temp, -1);
9776 bzhiq(temp, temp, length);
9777 kmov(mask, temp);
9778 evmovdqu(bt, mask, dst, xmm, true, vec_enc);
9779 }
9780
9781 // Set memory operation for length "less than" 64 bytes.
9782 void MacroAssembler::fill64_masked(uint shift, Register dst, int disp,
9783 XMMRegister xmm, KRegister mask, Register length,
9784 Register temp, bool use64byteVector) {
9785 assert(MaxVectorSize >= 32, "vector length should be >= 32");
9786 const BasicType type[] = { T_BYTE, T_SHORT, T_INT, T_LONG};
9787 if (!use64byteVector) {
9788 fill32(dst, disp, xmm);
9789 subptr(length, 32 >> shift);
9790 fill32_masked(shift, dst, disp + 32, xmm, mask, length, temp);
9791 } else {
9792 assert(MaxVectorSize == 64, "vector length != 64");
9793 fill_masked(type[shift], Address(dst, disp), xmm, mask, length, temp, Assembler::AVX_512bit);
9794 }
9795 }
9796
9797
9798 void MacroAssembler::fill32_masked(uint shift, Register dst, int disp,
9799 XMMRegister xmm, KRegister mask, Register length,
9800 Register temp) {
9801 assert(MaxVectorSize >= 32, "vector length should be >= 32");
9802 const BasicType type[] = { T_BYTE, T_SHORT, T_INT, T_LONG};
9803 fill_masked(type[shift], Address(dst, disp), xmm, mask, length, temp, Assembler::AVX_256bit);
9804 }
9805
9806
9807 void MacroAssembler::fill32(Address dst, XMMRegister xmm) {
9808 assert(MaxVectorSize >= 32, "vector length should be >= 32");
9809 vmovdqu(dst, xmm);
9810 }
9811
9812 void MacroAssembler::fill32(Register dst, int disp, XMMRegister xmm) {
9813 fill32(Address(dst, disp), xmm);
9814 }
9815
9816 void MacroAssembler::fill64(Address dst, XMMRegister xmm, bool use64byteVector) {
9817 assert(MaxVectorSize >= 32, "vector length should be >= 32");
9818 if (!use64byteVector) {
9819 fill32(dst, xmm);
9820 fill32(dst.plus_disp(32), xmm);
9821 } else {
9822 evmovdquq(dst, xmm, Assembler::AVX_512bit);
9823 }
9824 }
9825
9826 void MacroAssembler::fill64(Register dst, int disp, XMMRegister xmm, bool use64byteVector) {
9827 fill64(Address(dst, disp), xmm, use64byteVector);
9828 }
9829
9830 #ifdef _LP64
9831 void MacroAssembler::generate_fill_avx3(BasicType type, Register to, Register value,
9832 Register count, Register rtmp, XMMRegister xtmp) {
9833 Label L_exit;
9834 Label L_fill_start;
9835 Label L_fill_64_bytes;
9836 Label L_fill_96_bytes;
9837 Label L_fill_128_bytes;
9838 Label L_fill_128_bytes_loop;
9839 Label L_fill_128_loop_header;
9840 Label L_fill_128_bytes_loop_header;
9841 Label L_fill_128_bytes_loop_pre_header;
9842 Label L_fill_zmm_sequence;
9843
9844 int shift = -1;
9845 int avx3threshold = VM_Version::avx3_threshold();
9846 switch(type) {
9847 case T_BYTE: shift = 0;
9848 break;
9849 case T_SHORT: shift = 1;
9850 break;
9851 case T_INT: shift = 2;
9852 break;
9853 /* Uncomment when LONG fill stubs are supported.
9854 case T_LONG: shift = 3;
9855 break;
9856 */
9857 default:
9858 fatal("Unhandled type: %s\n", type2name(type));
9859 }
9860
9861 if ((avx3threshold != 0) || (MaxVectorSize == 32)) {
9862
9863 if (MaxVectorSize == 64) {
9864 cmpq(count, avx3threshold >> shift);
9865 jcc(Assembler::greater, L_fill_zmm_sequence);
9866 }
9867
9868 evpbroadcast(type, xtmp, value, Assembler::AVX_256bit);
9869
9870 bind(L_fill_start);
9871
9872 cmpq(count, 32 >> shift);
9873 jccb(Assembler::greater, L_fill_64_bytes);
9874 fill32_masked(shift, to, 0, xtmp, k2, count, rtmp);
9875 jmp(L_exit);
9876
9877 bind(L_fill_64_bytes);
9878 cmpq(count, 64 >> shift);
9879 jccb(Assembler::greater, L_fill_96_bytes);
9880 fill64_masked(shift, to, 0, xtmp, k2, count, rtmp);
9881 jmp(L_exit);
9882
9883 bind(L_fill_96_bytes);
9884 cmpq(count, 96 >> shift);
9885 jccb(Assembler::greater, L_fill_128_bytes);
9886 fill64(to, 0, xtmp);
9887 subq(count, 64 >> shift);
9888 fill32_masked(shift, to, 64, xtmp, k2, count, rtmp);
9889 jmp(L_exit);
9890
9891 bind(L_fill_128_bytes);
9892 cmpq(count, 128 >> shift);
9893 jccb(Assembler::greater, L_fill_128_bytes_loop_pre_header);
9894 fill64(to, 0, xtmp);
9895 fill32(to, 64, xtmp);
9896 subq(count, 96 >> shift);
9897 fill32_masked(shift, to, 96, xtmp, k2, count, rtmp);
9898 jmp(L_exit);
9899
9900 bind(L_fill_128_bytes_loop_pre_header);
9901 {
9902 mov(rtmp, to);
9903 andq(rtmp, 31);
9904 jccb(Assembler::zero, L_fill_128_bytes_loop_header);
9905 negq(rtmp);
9906 addq(rtmp, 32);
9907 mov64(r8, -1L);
9908 bzhiq(r8, r8, rtmp);
9909 kmovql(k2, r8);
9910 evmovdqu(T_BYTE, k2, Address(to, 0), xtmp, true, Assembler::AVX_256bit);
9911 addq(to, rtmp);
9912 shrq(rtmp, shift);
9913 subq(count, rtmp);
9914 }
9915
9916 cmpq(count, 128 >> shift);
9917 jcc(Assembler::less, L_fill_start);
9918
9919 bind(L_fill_128_bytes_loop_header);
9920 subq(count, 128 >> shift);
9921
9922 align32();
9923 bind(L_fill_128_bytes_loop);
9924 fill64(to, 0, xtmp);
9925 fill64(to, 64, xtmp);
9926 addq(to, 128);
9927 subq(count, 128 >> shift);
9928 jccb(Assembler::greaterEqual, L_fill_128_bytes_loop);
9929
9930 addq(count, 128 >> shift);
9931 jcc(Assembler::zero, L_exit);
9932 jmp(L_fill_start);
9933 }
9934
9935 if (MaxVectorSize == 64) {
9936 // Sequence using 64 byte ZMM register.
9937 Label L_fill_128_bytes_zmm;
9938 Label L_fill_192_bytes_zmm;
9939 Label L_fill_192_bytes_loop_zmm;
9940 Label L_fill_192_bytes_loop_header_zmm;
9941 Label L_fill_192_bytes_loop_pre_header_zmm;
9942 Label L_fill_start_zmm_sequence;
9943
9944 bind(L_fill_zmm_sequence);
9945 evpbroadcast(type, xtmp, value, Assembler::AVX_512bit);
9946
9947 bind(L_fill_start_zmm_sequence);
9948 cmpq(count, 64 >> shift);
9949 jccb(Assembler::greater, L_fill_128_bytes_zmm);
9950 fill64_masked(shift, to, 0, xtmp, k2, count, rtmp, true);
9951 jmp(L_exit);
9952
9953 bind(L_fill_128_bytes_zmm);
9954 cmpq(count, 128 >> shift);
9955 jccb(Assembler::greater, L_fill_192_bytes_zmm);
9956 fill64(to, 0, xtmp, true);
9957 subq(count, 64 >> shift);
9958 fill64_masked(shift, to, 64, xtmp, k2, count, rtmp, true);
9959 jmp(L_exit);
9960
9961 bind(L_fill_192_bytes_zmm);
9962 cmpq(count, 192 >> shift);
9963 jccb(Assembler::greater, L_fill_192_bytes_loop_pre_header_zmm);
9964 fill64(to, 0, xtmp, true);
9965 fill64(to, 64, xtmp, true);
9966 subq(count, 128 >> shift);
9967 fill64_masked(shift, to, 128, xtmp, k2, count, rtmp, true);
9968 jmp(L_exit);
9969
9970 bind(L_fill_192_bytes_loop_pre_header_zmm);
9971 {
9972 movq(rtmp, to);
9973 andq(rtmp, 63);
9974 jccb(Assembler::zero, L_fill_192_bytes_loop_header_zmm);
9975 negq(rtmp);
9976 addq(rtmp, 64);
9977 mov64(r8, -1L);
9978 bzhiq(r8, r8, rtmp);
9979 kmovql(k2, r8);
9980 evmovdqu(T_BYTE, k2, Address(to, 0), xtmp, true, Assembler::AVX_512bit);
9981 addq(to, rtmp);
9982 shrq(rtmp, shift);
9983 subq(count, rtmp);
9984 }
9985
9986 cmpq(count, 192 >> shift);
9987 jcc(Assembler::less, L_fill_start_zmm_sequence);
9988
9989 bind(L_fill_192_bytes_loop_header_zmm);
9990 subq(count, 192 >> shift);
9991
9992 align32();
9993 bind(L_fill_192_bytes_loop_zmm);
9994 fill64(to, 0, xtmp, true);
9995 fill64(to, 64, xtmp, true);
9996 fill64(to, 128, xtmp, true);
9997 addq(to, 192);
9998 subq(count, 192 >> shift);
9999 jccb(Assembler::greaterEqual, L_fill_192_bytes_loop_zmm);
10000
10001 addq(count, 192 >> shift);
10002 jcc(Assembler::zero, L_exit);
10003 jmp(L_fill_start_zmm_sequence);
10004 }
10005 bind(L_exit);
10006 }
10007 #endif
10008 #endif //COMPILER2_OR_JVMCI
10009
10010
10011 #ifdef _LP64
10012 void MacroAssembler::convert_f2i(Register dst, XMMRegister src) {
10013 Label done;
10014 cvttss2sil(dst, src);
10015 // Conversion instructions do not match JLS for overflow, underflow and NaN -> fixup in stub
10016 cmpl(dst, 0x80000000); // float_sign_flip
10017 jccb(Assembler::notEqual, done);
10018 subptr(rsp, 8);
10019 movflt(Address(rsp, 0), src);
10020 call(RuntimeAddress(CAST_FROM_FN_PTR(address, StubRoutines::x86::f2i_fixup())));
10021 pop(dst);
10022 bind(done);
10023 }
10024
10025 void MacroAssembler::convert_d2i(Register dst, XMMRegister src) {
10026 Label done;
10027 cvttsd2sil(dst, src);
10028 // Conversion instructions do not match JLS for overflow, underflow and NaN -> fixup in stub
10029 cmpl(dst, 0x80000000); // float_sign_flip
10030 jccb(Assembler::notEqual, done);
10031 subptr(rsp, 8);
10032 movdbl(Address(rsp, 0), src);
10033 call(RuntimeAddress(CAST_FROM_FN_PTR(address, StubRoutines::x86::d2i_fixup())));
10034 pop(dst);
10035 bind(done);
10036 }
10037
10038 void MacroAssembler::convert_f2l(Register dst, XMMRegister src) {
10039 Label done;
10040 cvttss2siq(dst, src);
10041 cmp64(dst, ExternalAddress((address) StubRoutines::x86::double_sign_flip()));
10042 jccb(Assembler::notEqual, done);
10043 subptr(rsp, 8);
10044 movflt(Address(rsp, 0), src);
10045 call(RuntimeAddress(CAST_FROM_FN_PTR(address, StubRoutines::x86::f2l_fixup())));
10046 pop(dst);
10047 bind(done);
10048 }
10049
10050 void MacroAssembler::round_float(Register dst, XMMRegister src, Register rtmp, Register rcx) {
10051 // Following code is line by line assembly translation rounding algorithm.
10052 // Please refer to java.lang.Math.round(float) algorithm for details.
10053 const int32_t FloatConsts_EXP_BIT_MASK = 0x7F800000;
10054 const int32_t FloatConsts_SIGNIFICAND_WIDTH = 24;
10055 const int32_t FloatConsts_EXP_BIAS = 127;
10056 const int32_t FloatConsts_SIGNIF_BIT_MASK = 0x007FFFFF;
10057 const int32_t MINUS_32 = 0xFFFFFFE0;
10058 Label L_special_case, L_block1, L_exit;
10059 movl(rtmp, FloatConsts_EXP_BIT_MASK);
10060 movdl(dst, src);
10061 andl(dst, rtmp);
10062 sarl(dst, FloatConsts_SIGNIFICAND_WIDTH - 1);
10063 movl(rtmp, FloatConsts_SIGNIFICAND_WIDTH - 2 + FloatConsts_EXP_BIAS);
10064 subl(rtmp, dst);
10065 movl(rcx, rtmp);
10066 movl(dst, MINUS_32);
10067 testl(rtmp, dst);
10068 jccb(Assembler::notEqual, L_special_case);
10069 movdl(dst, src);
10070 andl(dst, FloatConsts_SIGNIF_BIT_MASK);
10071 orl(dst, FloatConsts_SIGNIF_BIT_MASK + 1);
10072 movdl(rtmp, src);
10073 testl(rtmp, rtmp);
10074 jccb(Assembler::greaterEqual, L_block1);
10075 negl(dst);
10076 bind(L_block1);
10077 sarl(dst);
10078 addl(dst, 0x1);
10079 sarl(dst, 0x1);
10080 jmp(L_exit);
10081 bind(L_special_case);
10082 convert_f2i(dst, src);
10083 bind(L_exit);
10084 }
10085
10086 void MacroAssembler::round_double(Register dst, XMMRegister src, Register rtmp, Register rcx) {
10087 // Following code is line by line assembly translation rounding algorithm.
10088 // Please refer to java.lang.Math.round(double) algorithm for details.
10089 const int64_t DoubleConsts_EXP_BIT_MASK = 0x7FF0000000000000L;
10090 const int64_t DoubleConsts_SIGNIFICAND_WIDTH = 53;
10091 const int64_t DoubleConsts_EXP_BIAS = 1023;
10092 const int64_t DoubleConsts_SIGNIF_BIT_MASK = 0x000FFFFFFFFFFFFFL;
10093 const int64_t MINUS_64 = 0xFFFFFFFFFFFFFFC0L;
10094 Label L_special_case, L_block1, L_exit;
10095 mov64(rtmp, DoubleConsts_EXP_BIT_MASK);
10096 movq(dst, src);
10097 andq(dst, rtmp);
10098 sarq(dst, DoubleConsts_SIGNIFICAND_WIDTH - 1);
10099 mov64(rtmp, DoubleConsts_SIGNIFICAND_WIDTH - 2 + DoubleConsts_EXP_BIAS);
10100 subq(rtmp, dst);
10101 movq(rcx, rtmp);
10102 mov64(dst, MINUS_64);
10103 testq(rtmp, dst);
10104 jccb(Assembler::notEqual, L_special_case);
10105 movq(dst, src);
10106 mov64(rtmp, DoubleConsts_SIGNIF_BIT_MASK);
10107 andq(dst, rtmp);
10108 mov64(rtmp, DoubleConsts_SIGNIF_BIT_MASK + 1);
10109 orq(dst, rtmp);
10110 movq(rtmp, src);
10111 testq(rtmp, rtmp);
10112 jccb(Assembler::greaterEqual, L_block1);
10113 negq(dst);
10114 bind(L_block1);
10115 sarq(dst);
10116 addq(dst, 0x1);
10117 sarq(dst, 0x1);
10118 jmp(L_exit);
10119 bind(L_special_case);
10120 convert_d2l(dst, src);
10121 bind(L_exit);
10122 }
10123
10124 void MacroAssembler::convert_d2l(Register dst, XMMRegister src) {
10125 Label done;
10126 cvttsd2siq(dst, src);
10127 cmp64(dst, ExternalAddress((address) StubRoutines::x86::double_sign_flip()));
10128 jccb(Assembler::notEqual, done);
10129 subptr(rsp, 8);
10130 movdbl(Address(rsp, 0), src);
10131 call(RuntimeAddress(CAST_FROM_FN_PTR(address, StubRoutines::x86::d2l_fixup())));
10132 pop(dst);
10133 bind(done);
10134 }
10135
10136 void MacroAssembler::cache_wb(Address line)
10137 {
10138 // 64 bit cpus always support clflush
10139 assert(VM_Version::supports_clflush(), "clflush should be available");
10140 bool optimized = VM_Version::supports_clflushopt();
10141 bool no_evict = VM_Version::supports_clwb();
10142
10143 // prefer clwb (writeback without evict) otherwise
10144 // prefer clflushopt (potentially parallel writeback with evict)
10145 // otherwise fallback on clflush (serial writeback with evict)
10146
10147 if (optimized) {
10148 if (no_evict) {
10149 clwb(line);
10150 } else {
10151 clflushopt(line);
10152 }
10153 } else {
10154 // no need for fence when using CLFLUSH
10155 clflush(line);
10156 }
10157 }
10158
10159 void MacroAssembler::cache_wbsync(bool is_pre)
10160 {
10161 assert(VM_Version::supports_clflush(), "clflush should be available");
10162 bool optimized = VM_Version::supports_clflushopt();
10163 bool no_evict = VM_Version::supports_clwb();
10164
10165 // pick the correct implementation
10166
10167 if (!is_pre && (optimized || no_evict)) {
10168 // need an sfence for post flush when using clflushopt or clwb
10169 // otherwise no no need for any synchroniaztion
10170
10171 sfence();
10172 }
10173 }
10174
10175 #endif // _LP64
10176
10177 Assembler::Condition MacroAssembler::negate_condition(Assembler::Condition cond) {
10178 switch (cond) {
10179 // Note some conditions are synonyms for others
10180 case Assembler::zero: return Assembler::notZero;
10181 case Assembler::notZero: return Assembler::zero;
10182 case Assembler::less: return Assembler::greaterEqual;
10183 case Assembler::lessEqual: return Assembler::greater;
10184 case Assembler::greater: return Assembler::lessEqual;
10185 case Assembler::greaterEqual: return Assembler::less;
10186 case Assembler::below: return Assembler::aboveEqual;
10187 case Assembler::belowEqual: return Assembler::above;
10188 case Assembler::above: return Assembler::belowEqual;
10189 case Assembler::aboveEqual: return Assembler::below;
10190 case Assembler::overflow: return Assembler::noOverflow;
10191 case Assembler::noOverflow: return Assembler::overflow;
10192 case Assembler::negative: return Assembler::positive;
10193 case Assembler::positive: return Assembler::negative;
10194 case Assembler::parity: return Assembler::noParity;
10195 case Assembler::noParity: return Assembler::parity;
10196 }
10197 ShouldNotReachHere(); return Assembler::overflow;
10198 }
10199
10200 SkipIfEqual::SkipIfEqual(
10201 MacroAssembler* masm, const bool* flag_addr, bool value, Register rscratch) {
10202 _masm = masm;
10203 _masm->cmp8(ExternalAddress((address)flag_addr), value, rscratch);
10204 _masm->jcc(Assembler::equal, _label);
10205 }
10206
10207 SkipIfEqual::~SkipIfEqual() {
10208 _masm->bind(_label);
10209 }
10210
10211 // 32-bit Windows has its own fast-path implementation
10212 // of get_thread
10213 #if !defined(WIN32) || defined(_LP64)
10214
10215 // This is simply a call to Thread::current()
10216 void MacroAssembler::get_thread(Register thread) {
10217 if (thread != rax) {
10218 push(rax);
10219 }
10220 LP64_ONLY(push(rdi);)
10221 LP64_ONLY(push(rsi);)
10222 push(rdx);
10223 push(rcx);
10224 #ifdef _LP64
10225 push(r8);
10226 push(r9);
10227 push(r10);
10228 push(r11);
10229 #endif
10230
10231 MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, Thread::current), 0);
10232
10233 #ifdef _LP64
10234 pop(r11);
10235 pop(r10);
10236 pop(r9);
10237 pop(r8);
10238 #endif
10239 pop(rcx);
10240 pop(rdx);
10241 LP64_ONLY(pop(rsi);)
10242 LP64_ONLY(pop(rdi);)
10243 if (thread != rax) {
10244 mov(thread, rax);
10245 pop(rax);
10246 }
10247 }
10248
10249
10250 #endif // !WIN32 || _LP64
10251
10252 void MacroAssembler::check_stack_alignment(Register sp, const char* msg, unsigned bias, Register tmp) {
10253 Label L_stack_ok;
10254 if (bias == 0) {
10255 testptr(sp, 2 * wordSize - 1);
10256 } else {
10257 // lea(tmp, Address(rsp, bias);
10258 mov(tmp, sp);
10259 addptr(tmp, bias);
10260 testptr(tmp, 2 * wordSize - 1);
10261 }
10262 jcc(Assembler::equal, L_stack_ok);
10263 block_comment(msg);
10264 stop(msg);
10265 bind(L_stack_ok);
10266 }
10267
10268 // Implements lightweight-locking.
10269 //
10270 // obj: the object to be locked
10271 // reg_rax: rax
10272 // thread: the thread which attempts to lock obj
10273 // tmp: a temporary register
10274 void MacroAssembler::lightweight_lock(Register obj, Register reg_rax, Register thread, Register tmp, Label& slow) {
10275 assert(reg_rax == rax, "");
10276 assert_different_registers(obj, reg_rax, thread, tmp);
10277
10278 Label push;
10279 const Register top = tmp;
10280
10281 // Preload the markWord. It is important that this is the first
10282 // instruction emitted as it is part of C1's null check semantics.
10283 movptr(reg_rax, Address(obj, oopDesc::mark_offset_in_bytes()));
10284
10285 // Load top.
10286 movl(top, Address(thread, JavaThread::lock_stack_top_offset()));
10287
10288 // Check if the lock-stack is full.
10289 cmpl(top, LockStack::end_offset());
10290 jcc(Assembler::greaterEqual, slow);
10291
10292 // Check for recursion.
10293 cmpptr(obj, Address(thread, top, Address::times_1, -oopSize));
10294 jcc(Assembler::equal, push);
10295
10296 // Check header for monitor (0b10).
10297 testptr(reg_rax, markWord::monitor_value);
10298 jcc(Assembler::notZero, slow);
10299
10300 // Try to lock. Transition lock bits 0b01 => 0b00
10301 movptr(tmp, reg_rax);
10302 andptr(tmp, ~(int32_t)markWord::unlocked_value);
10303 orptr(reg_rax, markWord::unlocked_value);
10304 lock(); cmpxchgptr(tmp, Address(obj, oopDesc::mark_offset_in_bytes()));
10305 jcc(Assembler::notEqual, slow);
10306
10307 // Restore top, CAS clobbers register.
10308 movl(top, Address(thread, JavaThread::lock_stack_top_offset()));
10309
10310 bind(push);
10311 // After successful lock, push object on lock-stack.
10312 movptr(Address(thread, top), obj);
10313 incrementl(top, oopSize);
10314 movl(Address(thread, JavaThread::lock_stack_top_offset()), top);
10315 }
10316
10317 // Implements lightweight-unlocking.
10318 //
10319 // obj: the object to be unlocked
10320 // reg_rax: rax
10321 // thread: the thread
10322 // tmp: a temporary register
10323 //
10324 // x86_32 Note: reg_rax and thread may alias each other due to limited register
10325 // availiability.
10326 void MacroAssembler::lightweight_unlock(Register obj, Register reg_rax, Register thread, Register tmp, Label& slow) {
10327 assert(reg_rax == rax, "");
10328 assert_different_registers(obj, reg_rax, tmp);
10329 LP64_ONLY(assert_different_registers(obj, reg_rax, thread, tmp);)
10330
10331 Label unlocked, push_and_slow;
10332 const Register top = tmp;
10333
10334 // Check if obj is top of lock-stack.
10335 movl(top, Address(thread, JavaThread::lock_stack_top_offset()));
10336 cmpptr(obj, Address(thread, top, Address::times_1, -oopSize));
10337 jcc(Assembler::notEqual, slow);
10338
10339 // Pop lock-stack.
10340 DEBUG_ONLY(movptr(Address(thread, top, Address::times_1, -oopSize), 0);)
10341 subl(Address(thread, JavaThread::lock_stack_top_offset()), oopSize);
10342
10343 // Check if recursive.
10344 cmpptr(obj, Address(thread, top, Address::times_1, -2 * oopSize));
10345 jcc(Assembler::equal, unlocked);
10346
10347 // Not recursive. Check header for monitor (0b10).
10348 movptr(reg_rax, Address(obj, oopDesc::mark_offset_in_bytes()));
10349 testptr(reg_rax, markWord::monitor_value);
10350 jcc(Assembler::notZero, push_and_slow);
10351
10352 #ifdef ASSERT
10353 // Check header not unlocked (0b01).
10354 Label not_unlocked;
10355 testptr(reg_rax, markWord::unlocked_value);
10356 jcc(Assembler::zero, not_unlocked);
10357 stop("lightweight_unlock already unlocked");
10358 bind(not_unlocked);
10359 #endif
10360
10361 // Try to unlock. Transition lock bits 0b00 => 0b01
10362 movptr(tmp, reg_rax);
10363 orptr(tmp, markWord::unlocked_value);
10364 lock(); cmpxchgptr(tmp, Address(obj, oopDesc::mark_offset_in_bytes()));
10365 jcc(Assembler::equal, unlocked);
10366
10367 bind(push_and_slow);
10368 // Restore lock-stack and handle the unlock in runtime.
10369 if (thread == reg_rax) {
10370 // On x86_32 we may lose the thread.
10371 get_thread(thread);
10372 }
10373 #ifdef ASSERT
10374 movl(top, Address(thread, JavaThread::lock_stack_top_offset()));
10375 movptr(Address(thread, top), obj);
10376 #endif
10377 addl(Address(thread, JavaThread::lock_stack_top_offset()), oopSize);
10378 jmp(slow);
10379
10380 bind(unlocked);
10381 }