1 /*
2 * Copyright (c) 1997, 2025, 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 "asm/assembler.hpp"
26 #include "asm/assembler.inline.hpp"
27 #include "code/aotCodeCache.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 "interpreter/interpreterRuntime.hpp"
39 #include "jvm.h"
40 #include "memory/resourceArea.hpp"
41 #include "memory/universe.hpp"
42 #include "oops/accessDecorators.hpp"
43 #include "oops/compressedKlass.inline.hpp"
44 #include "oops/compressedOops.inline.hpp"
45 #include "oops/klass.inline.hpp"
46 #include "prims/methodHandles.hpp"
47 #include "runtime/continuation.hpp"
48 #include "runtime/interfaceSupport.inline.hpp"
49 #include "runtime/javaThread.hpp"
50 #include "runtime/jniHandles.hpp"
51 #include "runtime/objectMonitor.hpp"
52 #include "runtime/os.hpp"
53 #include "runtime/safepoint.hpp"
54 #include "runtime/safepointMechanism.hpp"
55 #include "runtime/sharedRuntime.hpp"
56 #include "runtime/stubRoutines.hpp"
57 #include "utilities/checkedCast.hpp"
58 #include "utilities/macros.hpp"
59
60 #ifdef PRODUCT
61 #define BLOCK_COMMENT(str) /* nothing */
62 #define STOP(error) stop(error)
63 #else
64 #define BLOCK_COMMENT(str) block_comment(str)
65 #define STOP(error) block_comment(error); stop(error)
66 #endif
67
68 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
69
70 #ifdef ASSERT
71 bool AbstractAssembler::pd_check_instruction_mark() { return true; }
72 #endif
73
74 static const Assembler::Condition reverse[] = {
75 Assembler::noOverflow /* overflow = 0x0 */ ,
76 Assembler::overflow /* noOverflow = 0x1 */ ,
77 Assembler::aboveEqual /* carrySet = 0x2, below = 0x2 */ ,
78 Assembler::below /* aboveEqual = 0x3, carryClear = 0x3 */ ,
79 Assembler::notZero /* zero = 0x4, equal = 0x4 */ ,
80 Assembler::zero /* notZero = 0x5, notEqual = 0x5 */ ,
81 Assembler::above /* belowEqual = 0x6 */ ,
82 Assembler::belowEqual /* above = 0x7 */ ,
83 Assembler::positive /* negative = 0x8 */ ,
84 Assembler::negative /* positive = 0x9 */ ,
85 Assembler::noParity /* parity = 0xa */ ,
86 Assembler::parity /* noParity = 0xb */ ,
87 Assembler::greaterEqual /* less = 0xc */ ,
88 Assembler::less /* greaterEqual = 0xd */ ,
89 Assembler::greater /* lessEqual = 0xe */ ,
90 Assembler::lessEqual /* greater = 0xf, */
91
92 };
93
94
95 // Implementation of MacroAssembler
96
97 Address MacroAssembler::as_Address(AddressLiteral adr) {
98 // amd64 always does this as a pc-rel
99 // we can be absolute or disp based on the instruction type
100 // jmp/call are displacements others are absolute
101 assert(!adr.is_lval(), "must be rval");
102 assert(reachable(adr), "must be");
103 return Address(checked_cast<int32_t>(adr.target() - pc()), adr.target(), adr.reloc());
104
105 }
106
107 Address MacroAssembler::as_Address(ArrayAddress adr, Register rscratch) {
108 AddressLiteral base = adr.base();
109 lea(rscratch, base);
110 Address index = adr.index();
111 assert(index._disp == 0, "must not have disp"); // maybe it can?
112 Address array(rscratch, index._index, index._scale, index._disp);
113 return array;
114 }
115
116 void MacroAssembler::call_VM_leaf_base(address entry_point, int num_args) {
117 Label L, E;
118
119 #ifdef _WIN64
120 // Windows always allocates space for it's register args
121 assert(num_args <= 4, "only register arguments supported");
122 subq(rsp, frame::arg_reg_save_area_bytes);
123 #endif
124
125 // Align stack if necessary
126 testl(rsp, 15);
127 jcc(Assembler::zero, L);
128
129 subq(rsp, 8);
130 call(RuntimeAddress(entry_point));
131 addq(rsp, 8);
132 jmp(E);
133
134 bind(L);
135 call(RuntimeAddress(entry_point));
136
137 bind(E);
138
139 #ifdef _WIN64
140 // restore stack pointer
141 addq(rsp, frame::arg_reg_save_area_bytes);
142 #endif
143 }
144
145 void MacroAssembler::cmp64(Register src1, AddressLiteral src2, Register rscratch) {
146 assert(!src2.is_lval(), "should use cmpptr");
147 assert(rscratch != noreg || always_reachable(src2), "missing");
148
149 if (reachable(src2)) {
150 cmpq(src1, as_Address(src2));
151 } else {
152 lea(rscratch, src2);
153 Assembler::cmpq(src1, Address(rscratch, 0));
154 }
155 }
156
157 int MacroAssembler::corrected_idivq(Register reg) {
158 // Full implementation of Java ldiv and lrem; checks for special
159 // case as described in JVM spec., p.243 & p.271. The function
160 // returns the (pc) offset of the idivl instruction - may be needed
161 // for implicit exceptions.
162 //
163 // normal case special case
164 //
165 // input : rax: dividend min_long
166 // reg: divisor (may not be eax/edx) -1
167 //
168 // output: rax: quotient (= rax idiv reg) min_long
169 // rdx: remainder (= rax irem reg) 0
170 assert(reg != rax && reg != rdx, "reg cannot be rax or rdx register");
171 static const int64_t min_long = 0x8000000000000000;
172 Label normal_case, special_case;
173
174 // check for special case
175 cmp64(rax, ExternalAddress((address) &min_long), rdx /*rscratch*/);
176 jcc(Assembler::notEqual, normal_case);
177 xorl(rdx, rdx); // prepare rdx for possible special case (where
178 // remainder = 0)
179 cmpq(reg, -1);
180 jcc(Assembler::equal, special_case);
181
182 // handle normal case
183 bind(normal_case);
184 cdqq();
185 int idivq_offset = offset();
186 idivq(reg);
187
188 // normal and special case exit
189 bind(special_case);
190
191 return idivq_offset;
192 }
193
194 void MacroAssembler::decrementq(Register reg, int value) {
195 if (value == min_jint) { subq(reg, value); return; }
196 if (value < 0) { incrementq(reg, -value); return; }
197 if (value == 0) { ; return; }
198 if (value == 1 && UseIncDec) { decq(reg) ; return; }
199 /* else */ { subq(reg, value) ; return; }
200 }
201
202 void MacroAssembler::decrementq(Address dst, int value) {
203 if (value == min_jint) { subq(dst, value); return; }
204 if (value < 0) { incrementq(dst, -value); return; }
205 if (value == 0) { ; return; }
206 if (value == 1 && UseIncDec) { decq(dst) ; return; }
207 /* else */ { subq(dst, value) ; return; }
208 }
209
210 void MacroAssembler::incrementq(AddressLiteral dst, Register rscratch) {
211 assert(rscratch != noreg || always_reachable(dst), "missing");
212
213 if (reachable(dst)) {
214 incrementq(as_Address(dst));
215 } else {
216 lea(rscratch, dst);
217 incrementq(Address(rscratch, 0));
218 }
219 }
220
221 void MacroAssembler::incrementq(Register reg, int value) {
222 if (value == min_jint) { addq(reg, value); return; }
223 if (value < 0) { decrementq(reg, -value); return; }
224 if (value == 0) { ; return; }
225 if (value == 1 && UseIncDec) { incq(reg) ; return; }
226 /* else */ { addq(reg, value) ; return; }
227 }
228
229 void MacroAssembler::incrementq(Address dst, int value) {
230 if (value == min_jint) { addq(dst, value); return; }
231 if (value < 0) { decrementq(dst, -value); return; }
232 if (value == 0) { ; return; }
233 if (value == 1 && UseIncDec) { incq(dst) ; return; }
234 /* else */ { addq(dst, value) ; return; }
235 }
236
237 // 32bit can do a case table jump in one instruction but we no longer allow the base
238 // to be installed in the Address class
239 void MacroAssembler::jump(ArrayAddress entry, Register rscratch) {
240 lea(rscratch, entry.base());
241 Address dispatch = entry.index();
242 assert(dispatch._base == noreg, "must be");
243 dispatch._base = rscratch;
244 jmp(dispatch);
245 }
246
247 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) {
248 ShouldNotReachHere(); // 64bit doesn't use two regs
249 cmpq(x_lo, y_lo);
250 }
251
252 void MacroAssembler::lea(Register dst, AddressLiteral src) {
253 mov_literal64(dst, (intptr_t)src.target(), src.rspec());
254 }
255
256 void MacroAssembler::lea(Address dst, AddressLiteral adr, Register rscratch) {
257 lea(rscratch, adr);
258 movptr(dst, rscratch);
259 }
260
261 void MacroAssembler::leave() {
262 // %%% is this really better? Why not on 32bit too?
263 emit_int8((unsigned char)0xC9); // LEAVE
264 }
265
266 void MacroAssembler::lneg(Register hi, Register lo) {
267 ShouldNotReachHere(); // 64bit doesn't use two regs
268 negq(lo);
269 }
270
271 void MacroAssembler::movoop(Register dst, jobject obj) {
272 mov_literal64(dst, (intptr_t)obj, oop_Relocation::spec_for_immediate());
273 }
274
275 void MacroAssembler::movoop(Address dst, jobject obj, Register rscratch) {
276 mov_literal64(rscratch, (intptr_t)obj, oop_Relocation::spec_for_immediate());
277 movq(dst, rscratch);
278 }
279
280 void MacroAssembler::mov_metadata(Register dst, Metadata* obj) {
281 mov_literal64(dst, (intptr_t)obj, metadata_Relocation::spec_for_immediate());
282 }
283
284 void MacroAssembler::mov_metadata(Address dst, Metadata* obj, Register rscratch) {
285 mov_literal64(rscratch, (intptr_t)obj, metadata_Relocation::spec_for_immediate());
286 movq(dst, rscratch);
287 }
288
289 void MacroAssembler::movptr(Register dst, AddressLiteral src) {
290 if (src.is_lval()) {
291 mov_literal64(dst, (intptr_t)src.target(), src.rspec());
292 } else {
293 if (reachable(src)) {
294 movq(dst, as_Address(src));
295 } else {
296 lea(dst, src);
297 movq(dst, Address(dst, 0));
298 }
299 }
300 }
301
302 void MacroAssembler::movptr(ArrayAddress dst, Register src, Register rscratch) {
303 movq(as_Address(dst, rscratch), src);
304 }
305
306 void MacroAssembler::movptr(Register dst, ArrayAddress src) {
307 movq(dst, as_Address(src, dst /*rscratch*/));
308 }
309
310 // src should NEVER be a real pointer. Use AddressLiteral for true pointers
311 void MacroAssembler::movptr(Address dst, intptr_t src, Register rscratch) {
312 if (is_simm32(src)) {
313 movptr(dst, checked_cast<int32_t>(src));
314 } else {
315 mov64(rscratch, src);
316 movq(dst, rscratch);
317 }
318 }
319
320 void MacroAssembler::pushoop(jobject obj, Register rscratch) {
321 movoop(rscratch, obj);
322 push(rscratch);
323 }
324
325 void MacroAssembler::pushklass(Metadata* obj, Register rscratch) {
326 mov_metadata(rscratch, obj);
327 push(rscratch);
328 }
329
330 void MacroAssembler::pushptr(AddressLiteral src, Register rscratch) {
331 lea(rscratch, src);
332 if (src.is_lval()) {
333 push(rscratch);
334 } else {
335 pushq(Address(rscratch, 0));
336 }
337 }
338
339 static void pass_arg0(MacroAssembler* masm, Register arg) {
340 if (c_rarg0 != arg ) {
341 masm->mov(c_rarg0, arg);
342 }
343 }
344
345 static void pass_arg1(MacroAssembler* masm, Register arg) {
346 if (c_rarg1 != arg ) {
347 masm->mov(c_rarg1, arg);
348 }
349 }
350
351 static void pass_arg2(MacroAssembler* masm, Register arg) {
352 if (c_rarg2 != arg ) {
353 masm->mov(c_rarg2, arg);
354 }
355 }
356
357 static void pass_arg3(MacroAssembler* masm, Register arg) {
358 if (c_rarg3 != arg ) {
359 masm->mov(c_rarg3, arg);
360 }
361 }
362
363 void MacroAssembler::stop(const char* msg) {
364 if (ShowMessageBoxOnError) {
365 address rip = pc();
366 pusha(); // get regs on stack
367 lea(c_rarg1, InternalAddress(rip));
368 movq(c_rarg2, rsp); // pass pointer to regs array
369 }
370 // Skip AOT caching C strings in scratch buffer.
371 const char* str = (code_section()->scratch_emit()) ? msg : AOTCodeCache::add_C_string(msg);
372 lea(c_rarg0, ExternalAddress((address) str));
373 andq(rsp, -16); // align stack as required by ABI
374 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug64)));
375 hlt();
376 }
377
378 void MacroAssembler::warn(const char* msg) {
379 push(rbp);
380 movq(rbp, rsp);
381 andq(rsp, -16); // align stack as required by push_CPU_state and call
382 push_CPU_state(); // keeps alignment at 16 bytes
383
384 #ifdef _WIN64
385 // Windows always allocates space for its register args
386 subq(rsp, frame::arg_reg_save_area_bytes);
387 #endif
388 lea(c_rarg0, ExternalAddress((address) msg));
389 call(RuntimeAddress(CAST_FROM_FN_PTR(address, warning)));
390
391 #ifdef _WIN64
392 // restore stack pointer
393 addq(rsp, frame::arg_reg_save_area_bytes);
394 #endif
395 pop_CPU_state();
396 mov(rsp, rbp);
397 pop(rbp);
398 }
399
400 void MacroAssembler::print_state() {
401 address rip = pc();
402 pusha(); // get regs on stack
403 push(rbp);
404 movq(rbp, rsp);
405 andq(rsp, -16); // align stack as required by push_CPU_state and call
406 push_CPU_state(); // keeps alignment at 16 bytes
407
408 lea(c_rarg0, InternalAddress(rip));
409 lea(c_rarg1, Address(rbp, wordSize)); // pass pointer to regs array
410 call_VM_leaf(CAST_FROM_FN_PTR(address, MacroAssembler::print_state64), c_rarg0, c_rarg1);
411
412 pop_CPU_state();
413 mov(rsp, rbp);
414 pop(rbp);
415 popa();
416 }
417
418 #ifndef PRODUCT
419 extern "C" void findpc(intptr_t x);
420 #endif
421
422 void MacroAssembler::debug64(char* msg, int64_t pc, int64_t regs[]) {
423 // In order to get locks to work, we need to fake a in_VM state
424 if (ShowMessageBoxOnError) {
425 JavaThread* thread = JavaThread::current();
426 JavaThreadState saved_state = thread->thread_state();
427 thread->set_thread_state(_thread_in_vm);
428 #ifndef PRODUCT
429 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
430 ttyLocker ttyl;
431 BytecodeCounter::print();
432 }
433 #endif
434 // To see where a verify_oop failed, get $ebx+40/X for this frame.
435 // XXX correct this offset for amd64
436 // This is the value of eip which points to where verify_oop will return.
437 if (os::message_box(msg, "Execution stopped, print registers?")) {
438 print_state64(pc, regs);
439 BREAKPOINT;
440 }
441 }
442 fatal("DEBUG MESSAGE: %s", msg);
443 }
444
445 void MacroAssembler::print_state64(int64_t pc, int64_t regs[]) {
446 ttyLocker ttyl;
447 DebuggingContext debugging{};
448 tty->print_cr("rip = 0x%016lx", (intptr_t)pc);
449 #ifndef PRODUCT
450 tty->cr();
451 findpc(pc);
452 tty->cr();
453 #endif
454 #define PRINT_REG(rax, value) \
455 { tty->print("%s = ", #rax); os::print_location(tty, value); }
456 PRINT_REG(rax, regs[15]);
457 PRINT_REG(rbx, regs[12]);
458 PRINT_REG(rcx, regs[14]);
459 PRINT_REG(rdx, regs[13]);
460 PRINT_REG(rdi, regs[8]);
461 PRINT_REG(rsi, regs[9]);
462 PRINT_REG(rbp, regs[10]);
463 // rsp is actually not stored by pusha(), compute the old rsp from regs (rsp after pusha): regs + 16 = old rsp
464 PRINT_REG(rsp, (intptr_t)(®s[16]));
465 PRINT_REG(r8 , regs[7]);
466 PRINT_REG(r9 , regs[6]);
467 PRINT_REG(r10, regs[5]);
468 PRINT_REG(r11, regs[4]);
469 PRINT_REG(r12, regs[3]);
470 PRINT_REG(r13, regs[2]);
471 PRINT_REG(r14, regs[1]);
472 PRINT_REG(r15, regs[0]);
473 #undef PRINT_REG
474 // Print some words near the top of the stack.
475 int64_t* rsp = ®s[16];
476 int64_t* dump_sp = rsp;
477 for (int col1 = 0; col1 < 8; col1++) {
478 tty->print("(rsp+0x%03x) 0x%016lx: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp);
479 os::print_location(tty, *dump_sp++);
480 }
481 for (int row = 0; row < 25; row++) {
482 tty->print("(rsp+0x%03x) 0x%016lx: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp);
483 for (int col = 0; col < 4; col++) {
484 tty->print(" 0x%016lx", (intptr_t)*dump_sp++);
485 }
486 tty->cr();
487 }
488 // Print some instructions around pc:
489 Disassembler::decode((address)pc-64, (address)pc);
490 tty->print_cr("--------");
491 Disassembler::decode((address)pc, (address)pc+32);
492 }
493
494 // The java_calling_convention describes stack locations as ideal slots on
495 // a frame with no abi restrictions. Since we must observe abi restrictions
496 // (like the placement of the register window) the slots must be biased by
497 // the following value.
498 static int reg2offset_in(VMReg r) {
499 // Account for saved rbp and return address
500 // This should really be in_preserve_stack_slots
501 return (r->reg2stack() + 4) * VMRegImpl::stack_slot_size;
502 }
503
504 static int reg2offset_out(VMReg r) {
505 return (r->reg2stack() + SharedRuntime::out_preserve_stack_slots()) * VMRegImpl::stack_slot_size;
506 }
507
508 // A long move
509 void MacroAssembler::long_move(VMRegPair src, VMRegPair dst, Register tmp, int in_stk_bias, int out_stk_bias) {
510
511 // The calling conventions assures us that each VMregpair is either
512 // all really one physical register or adjacent stack slots.
513
514 if (src.is_single_phys_reg() ) {
515 if (dst.is_single_phys_reg()) {
516 if (dst.first() != src.first()) {
517 mov(dst.first()->as_Register(), src.first()->as_Register());
518 }
519 } else {
520 assert(dst.is_single_reg(), "not a stack pair: (%s, %s), (%s, %s)",
521 src.first()->name(), src.second()->name(), dst.first()->name(), dst.second()->name());
522 movq(Address(rsp, reg2offset_out(dst.first()) + out_stk_bias), src.first()->as_Register());
523 }
524 } else if (dst.is_single_phys_reg()) {
525 assert(src.is_single_reg(), "not a stack pair");
526 movq(dst.first()->as_Register(), Address(rbp, reg2offset_in(src.first()) + in_stk_bias));
527 } else {
528 assert(src.is_single_reg() && dst.is_single_reg(), "not stack pairs");
529 movq(tmp, Address(rbp, reg2offset_in(src.first()) + in_stk_bias));
530 movq(Address(rsp, reg2offset_out(dst.first()) + out_stk_bias), tmp);
531 }
532 }
533
534 // A double move
535 void MacroAssembler::double_move(VMRegPair src, VMRegPair dst, Register tmp, int in_stk_bias, int out_stk_bias) {
536
537 // The calling conventions assures us that each VMregpair is either
538 // all really one physical register or adjacent stack slots.
539
540 if (src.is_single_phys_reg() ) {
541 if (dst.is_single_phys_reg()) {
542 // In theory these overlap but the ordering is such that this is likely a nop
543 if ( src.first() != dst.first()) {
544 movdbl(dst.first()->as_XMMRegister(), src.first()->as_XMMRegister());
545 }
546 } else {
547 assert(dst.is_single_reg(), "not a stack pair");
548 movdbl(Address(rsp, reg2offset_out(dst.first()) + out_stk_bias), src.first()->as_XMMRegister());
549 }
550 } else if (dst.is_single_phys_reg()) {
551 assert(src.is_single_reg(), "not a stack pair");
552 movdbl(dst.first()->as_XMMRegister(), Address(rbp, reg2offset_in(src.first()) + in_stk_bias));
553 } else {
554 assert(src.is_single_reg() && dst.is_single_reg(), "not stack pairs");
555 movq(tmp, Address(rbp, reg2offset_in(src.first()) + in_stk_bias));
556 movq(Address(rsp, reg2offset_out(dst.first()) + out_stk_bias), tmp);
557 }
558 }
559
560
561 // A float arg may have to do float reg int reg conversion
562 void MacroAssembler::float_move(VMRegPair src, VMRegPair dst, Register tmp, int in_stk_bias, int out_stk_bias) {
563 assert(!src.second()->is_valid() && !dst.second()->is_valid(), "bad float_move");
564
565 // The calling conventions assures us that each VMregpair is either
566 // all really one physical register or adjacent stack slots.
567
568 if (src.first()->is_stack()) {
569 if (dst.first()->is_stack()) {
570 movl(tmp, Address(rbp, reg2offset_in(src.first()) + in_stk_bias));
571 movptr(Address(rsp, reg2offset_out(dst.first()) + out_stk_bias), tmp);
572 } else {
573 // stack to reg
574 assert(dst.first()->is_XMMRegister(), "only expect xmm registers as parameters");
575 movflt(dst.first()->as_XMMRegister(), Address(rbp, reg2offset_in(src.first()) + in_stk_bias));
576 }
577 } else if (dst.first()->is_stack()) {
578 // reg to stack
579 assert(src.first()->is_XMMRegister(), "only expect xmm registers as parameters");
580 movflt(Address(rsp, reg2offset_out(dst.first()) + out_stk_bias), src.first()->as_XMMRegister());
581 } else {
582 // reg to reg
583 // In theory these overlap but the ordering is such that this is likely a nop
584 if ( src.first() != dst.first()) {
585 movdbl(dst.first()->as_XMMRegister(), src.first()->as_XMMRegister());
586 }
587 }
588 }
589
590 // On 64 bit we will store integer like items to the stack as
591 // 64 bits items (x86_32/64 abi) even though java would only store
592 // 32bits for a parameter. On 32bit it will simply be 32 bits
593 // So this routine will do 32->32 on 32bit and 32->64 on 64bit
594 void MacroAssembler::move32_64(VMRegPair src, VMRegPair dst, Register tmp, int in_stk_bias, int out_stk_bias) {
595 if (src.first()->is_stack()) {
596 if (dst.first()->is_stack()) {
597 // stack to stack
598 movslq(tmp, Address(rbp, reg2offset_in(src.first()) + in_stk_bias));
599 movq(Address(rsp, reg2offset_out(dst.first()) + out_stk_bias), tmp);
600 } else {
601 // stack to reg
602 movslq(dst.first()->as_Register(), Address(rbp, reg2offset_in(src.first()) + in_stk_bias));
603 }
604 } else if (dst.first()->is_stack()) {
605 // reg to stack
606 // Do we really have to sign extend???
607 // __ movslq(src.first()->as_Register(), src.first()->as_Register());
608 movq(Address(rsp, reg2offset_out(dst.first()) + out_stk_bias), src.first()->as_Register());
609 } else {
610 // Do we really have to sign extend???
611 // __ movslq(dst.first()->as_Register(), src.first()->as_Register());
612 if (dst.first() != src.first()) {
613 movq(dst.first()->as_Register(), src.first()->as_Register());
614 }
615 }
616 }
617
618 void MacroAssembler::move_ptr(VMRegPair src, VMRegPair dst) {
619 if (src.first()->is_stack()) {
620 if (dst.first()->is_stack()) {
621 // stack to stack
622 movq(rax, Address(rbp, reg2offset_in(src.first())));
623 movq(Address(rsp, reg2offset_out(dst.first())), rax);
624 } else {
625 // stack to reg
626 movq(dst.first()->as_Register(), Address(rbp, reg2offset_in(src.first())));
627 }
628 } else if (dst.first()->is_stack()) {
629 // reg to stack
630 movq(Address(rsp, reg2offset_out(dst.first())), src.first()->as_Register());
631 } else {
632 if (dst.first() != src.first()) {
633 movq(dst.first()->as_Register(), src.first()->as_Register());
634 }
635 }
636 }
637
638 // An oop arg. Must pass a handle not the oop itself
639 void MacroAssembler::object_move(OopMap* map,
640 int oop_handle_offset,
641 int framesize_in_slots,
642 VMRegPair src,
643 VMRegPair dst,
644 bool is_receiver,
645 int* receiver_offset) {
646
647 // must pass a handle. First figure out the location we use as a handle
648
649 Register rHandle = dst.first()->is_stack() ? rax : dst.first()->as_Register();
650
651 // See if oop is null if it is we need no handle
652
653 if (src.first()->is_stack()) {
654
655 // Oop is already on the stack as an argument
656 int offset_in_older_frame = src.first()->reg2stack() + SharedRuntime::out_preserve_stack_slots();
657 map->set_oop(VMRegImpl::stack2reg(offset_in_older_frame + framesize_in_slots));
658 if (is_receiver) {
659 *receiver_offset = (offset_in_older_frame + framesize_in_slots) * VMRegImpl::stack_slot_size;
660 }
661
662 cmpptr(Address(rbp, reg2offset_in(src.first())), NULL_WORD);
663 lea(rHandle, Address(rbp, reg2offset_in(src.first())));
664 // conditionally move a null
665 cmovptr(Assembler::equal, rHandle, Address(rbp, reg2offset_in(src.first())));
666 } else {
667
668 // Oop is in a register we must store it to the space we reserve
669 // on the stack for oop_handles and pass a handle if oop is non-null
670
671 const Register rOop = src.first()->as_Register();
672 int oop_slot;
673 if (rOop == j_rarg0)
674 oop_slot = 0;
675 else if (rOop == j_rarg1)
676 oop_slot = 1;
677 else if (rOop == j_rarg2)
678 oop_slot = 2;
679 else if (rOop == j_rarg3)
680 oop_slot = 3;
681 else if (rOop == j_rarg4)
682 oop_slot = 4;
683 else {
684 assert(rOop == j_rarg5, "wrong register");
685 oop_slot = 5;
686 }
687
688 oop_slot = oop_slot * VMRegImpl::slots_per_word + oop_handle_offset;
689 int offset = oop_slot*VMRegImpl::stack_slot_size;
690
691 map->set_oop(VMRegImpl::stack2reg(oop_slot));
692 // Store oop in handle area, may be null
693 movptr(Address(rsp, offset), rOop);
694 if (is_receiver) {
695 *receiver_offset = offset;
696 }
697
698 cmpptr(rOop, NULL_WORD);
699 lea(rHandle, Address(rsp, offset));
700 // conditionally move a null from the handle area where it was just stored
701 cmovptr(Assembler::equal, rHandle, Address(rsp, offset));
702 }
703
704 // If arg is on the stack then place it otherwise it is already in correct reg.
705 if (dst.first()->is_stack()) {
706 movptr(Address(rsp, reg2offset_out(dst.first())), rHandle);
707 }
708 }
709
710 void MacroAssembler::addptr(Register dst, int32_t imm32) {
711 addq(dst, imm32);
712 }
713
714 void MacroAssembler::addptr(Register dst, Register src) {
715 addq(dst, src);
716 }
717
718 void MacroAssembler::addptr(Address dst, Register src) {
719 addq(dst, src);
720 }
721
722 void MacroAssembler::addsd(XMMRegister dst, AddressLiteral src, Register rscratch) {
723 assert(rscratch != noreg || always_reachable(src), "missing");
724
725 if (reachable(src)) {
726 Assembler::addsd(dst, as_Address(src));
727 } else {
728 lea(rscratch, src);
729 Assembler::addsd(dst, Address(rscratch, 0));
730 }
731 }
732
733 void MacroAssembler::addss(XMMRegister dst, AddressLiteral src, Register rscratch) {
734 assert(rscratch != noreg || always_reachable(src), "missing");
735
736 if (reachable(src)) {
737 addss(dst, as_Address(src));
738 } else {
739 lea(rscratch, src);
740 addss(dst, Address(rscratch, 0));
741 }
742 }
743
744 void MacroAssembler::addpd(XMMRegister dst, AddressLiteral src, Register rscratch) {
745 assert(rscratch != noreg || always_reachable(src), "missing");
746
747 if (reachable(src)) {
748 Assembler::addpd(dst, as_Address(src));
749 } else {
750 lea(rscratch, src);
751 Assembler::addpd(dst, Address(rscratch, 0));
752 }
753 }
754
755 // See 8273459. Function for ensuring 64-byte alignment, intended for stubs only.
756 // Stub code is generated once and never copied.
757 // NMethods can't use this because they get copied and we can't force alignment > 32 bytes.
758 void MacroAssembler::align64() {
759 align(64, (uint)(uintptr_t)pc());
760 }
761
762 void MacroAssembler::align32() {
763 align(32, (uint)(uintptr_t)pc());
764 }
765
766 void MacroAssembler::align(uint modulus) {
767 // 8273459: Ensure alignment is possible with current segment alignment
768 assert(modulus <= (uintx)CodeEntryAlignment, "Alignment must be <= CodeEntryAlignment");
769 align(modulus, offset());
770 }
771
772 void MacroAssembler::align(uint modulus, uint target) {
773 if (target % modulus != 0) {
774 nop(modulus - (target % modulus));
775 }
776 }
777
778 void MacroAssembler::push_f(XMMRegister r) {
779 subptr(rsp, wordSize);
780 movflt(Address(rsp, 0), r);
781 }
782
783 void MacroAssembler::pop_f(XMMRegister r) {
784 movflt(r, Address(rsp, 0));
785 addptr(rsp, wordSize);
786 }
787
788 void MacroAssembler::push_d(XMMRegister r) {
789 subptr(rsp, 2 * wordSize);
790 movdbl(Address(rsp, 0), r);
791 }
792
793 void MacroAssembler::pop_d(XMMRegister r) {
794 movdbl(r, Address(rsp, 0));
795 addptr(rsp, 2 * Interpreter::stackElementSize);
796 }
797
798 void MacroAssembler::push_ppx(Register src) {
799 if (VM_Version::supports_apx_f()) {
800 pushp(src);
801 } else {
802 Assembler::push(src);
803 }
804 }
805
806 void MacroAssembler::pop_ppx(Register dst) {
807 if (VM_Version::supports_apx_f()) {
808 popp(dst);
809 } else {
810 Assembler::pop(dst);
811 }
812 }
813
814 void MacroAssembler::andpd(XMMRegister dst, AddressLiteral src, Register rscratch) {
815 // Used in sign-masking with aligned address.
816 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
817 assert(rscratch != noreg || always_reachable(src), "missing");
818
819 if (UseAVX > 2 &&
820 (!VM_Version::supports_avx512dq() || !VM_Version::supports_avx512vl()) &&
821 (dst->encoding() >= 16)) {
822 vpand(dst, dst, src, AVX_512bit, rscratch);
823 } else if (reachable(src)) {
824 Assembler::andpd(dst, as_Address(src));
825 } else {
826 lea(rscratch, src);
827 Assembler::andpd(dst, Address(rscratch, 0));
828 }
829 }
830
831 void MacroAssembler::andps(XMMRegister dst, AddressLiteral src, Register rscratch) {
832 // Used in sign-masking with aligned address.
833 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
834 assert(rscratch != noreg || always_reachable(src), "missing");
835
836 if (reachable(src)) {
837 Assembler::andps(dst, as_Address(src));
838 } else {
839 lea(rscratch, src);
840 Assembler::andps(dst, Address(rscratch, 0));
841 }
842 }
843
844 void MacroAssembler::andptr(Register dst, int32_t imm32) {
845 andq(dst, imm32);
846 }
847
848 void MacroAssembler::andq(Register dst, AddressLiteral src, Register rscratch) {
849 assert(rscratch != noreg || always_reachable(src), "missing");
850
851 if (reachable(src)) {
852 andq(dst, as_Address(src));
853 } else {
854 lea(rscratch, src);
855 andq(dst, Address(rscratch, 0));
856 }
857 }
858
859 void MacroAssembler::atomic_incl(Address counter_addr) {
860 lock();
861 incrementl(counter_addr);
862 }
863
864 void MacroAssembler::atomic_incl(AddressLiteral counter_addr, Register rscratch) {
865 assert(rscratch != noreg || always_reachable(counter_addr), "missing");
866
867 if (reachable(counter_addr)) {
868 atomic_incl(as_Address(counter_addr));
869 } else {
870 lea(rscratch, counter_addr);
871 atomic_incl(Address(rscratch, 0));
872 }
873 }
874
875 void MacroAssembler::atomic_incq(Address counter_addr) {
876 lock();
877 incrementq(counter_addr);
878 }
879
880 void MacroAssembler::atomic_incq(AddressLiteral counter_addr, Register rscratch) {
881 assert(rscratch != noreg || always_reachable(counter_addr), "missing");
882
883 if (reachable(counter_addr)) {
884 atomic_incq(as_Address(counter_addr));
885 } else {
886 lea(rscratch, counter_addr);
887 atomic_incq(Address(rscratch, 0));
888 }
889 }
890
891 // Writes to stack successive pages until offset reached to check for
892 // stack overflow + shadow pages. This clobbers tmp.
893 void MacroAssembler::bang_stack_size(Register size, Register tmp) {
894 movptr(tmp, rsp);
895 // Bang stack for total size given plus shadow page size.
896 // Bang one page at a time because large size can bang beyond yellow and
897 // red zones.
898 Label loop;
899 bind(loop);
900 movl(Address(tmp, (-(int)os::vm_page_size())), size );
901 subptr(tmp, (int)os::vm_page_size());
902 subl(size, (int)os::vm_page_size());
903 jcc(Assembler::greater, loop);
904
905 // Bang down shadow pages too.
906 // At this point, (tmp-0) is the last address touched, so don't
907 // touch it again. (It was touched as (tmp-pagesize) but then tmp
908 // was post-decremented.) Skip this address by starting at i=1, and
909 // touch a few more pages below. N.B. It is important to touch all
910 // the way down including all pages in the shadow zone.
911 for (int i = 1; i < ((int)StackOverflow::stack_shadow_zone_size() / (int)os::vm_page_size()); i++) {
912 // this could be any sized move but this is can be a debugging crumb
913 // so the bigger the better.
914 movptr(Address(tmp, (-i*(int)os::vm_page_size())), size );
915 }
916 }
917
918 void MacroAssembler::reserved_stack_check() {
919 // testing if reserved zone needs to be enabled
920 Label no_reserved_zone_enabling;
921
922 cmpptr(rsp, Address(r15_thread, JavaThread::reserved_stack_activation_offset()));
923 jcc(Assembler::below, no_reserved_zone_enabling);
924
925 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), r15_thread);
926 jump(RuntimeAddress(SharedRuntime::throw_delayed_StackOverflowError_entry()));
927 should_not_reach_here();
928
929 bind(no_reserved_zone_enabling);
930 }
931
932 void MacroAssembler::c2bool(Register x) {
933 // implements x == 0 ? 0 : 1
934 // note: must only look at least-significant byte of x
935 // since C-style booleans are stored in one byte
936 // only! (was bug)
937 andl(x, 0xFF);
938 setb(Assembler::notZero, x);
939 }
940
941 // Wouldn't need if AddressLiteral version had new name
942 void MacroAssembler::call(Label& L, relocInfo::relocType rtype) {
943 Assembler::call(L, rtype);
944 }
945
946 void MacroAssembler::call(Register entry) {
947 Assembler::call(entry);
948 }
949
950 void MacroAssembler::call(AddressLiteral entry, Register rscratch) {
951 assert(rscratch != noreg || always_reachable(entry), "missing");
952
953 if (reachable(entry)) {
954 Assembler::call_literal(entry.target(), entry.rspec());
955 } else {
956 lea(rscratch, entry);
957 Assembler::call(rscratch);
958 }
959 }
960
961 void MacroAssembler::ic_call(address entry, jint method_index) {
962 RelocationHolder rh = virtual_call_Relocation::spec(pc(), method_index);
963 // Needs full 64-bit immediate for later patching.
964 mov64(rax, (int64_t)Universe::non_oop_word());
965 call(AddressLiteral(entry, rh));
966 }
967
968 int MacroAssembler::ic_check_size() {
969 return UseCompactObjectHeaders ? 17 : 14;
970 }
971
972 int MacroAssembler::ic_check(int end_alignment) {
973 Register receiver = j_rarg0;
974 Register data = rax;
975 Register temp = rscratch1;
976
977 // The UEP of a code blob ensures that the VEP is padded. However, the padding of the UEP is placed
978 // before the inline cache check, so we don't have to execute any nop instructions when dispatching
979 // through the UEP, yet we can ensure that the VEP is aligned appropriately. That's why we align
980 // before the inline cache check here, and not after
981 align(end_alignment, offset() + ic_check_size());
982
983 int uep_offset = offset();
984
985 if (UseCompactObjectHeaders) {
986 load_narrow_klass_compact(temp, receiver);
987 cmpl(temp, Address(data, CompiledICData::speculated_klass_offset()));
988 } else if (UseCompressedClassPointers) {
989 movl(temp, Address(receiver, oopDesc::klass_offset_in_bytes()));
990 cmpl(temp, Address(data, CompiledICData::speculated_klass_offset()));
991 } else {
992 movptr(temp, Address(receiver, oopDesc::klass_offset_in_bytes()));
993 cmpptr(temp, Address(data, CompiledICData::speculated_klass_offset()));
994 }
995
996 // if inline cache check fails, then jump to runtime routine
997 jump_cc(Assembler::notEqual, RuntimeAddress(SharedRuntime::get_ic_miss_stub()));
998 assert((offset() % end_alignment) == 0, "Misaligned verified entry point (%d, %d, %d)", uep_offset, offset(), end_alignment);
999
1000 return uep_offset;
1001 }
1002
1003 void MacroAssembler::emit_static_call_stub() {
1004 // Static stub relocation also tags the Method* in the code-stream.
1005 mov_metadata(rbx, (Metadata*) nullptr); // Method is zapped till fixup time.
1006 // This is recognized as unresolved by relocs/nativeinst/ic code.
1007 jump(RuntimeAddress(pc()));
1008 }
1009
1010 // Implementation of call_VM versions
1011
1012 void MacroAssembler::call_VM(Register oop_result,
1013 address entry_point,
1014 bool check_exceptions) {
1015 Label C, E;
1016 call(C, relocInfo::none);
1017 jmp(E);
1018
1019 bind(C);
1020 call_VM_helper(oop_result, entry_point, 0, check_exceptions);
1021 ret(0);
1022
1023 bind(E);
1024 }
1025
1026 void MacroAssembler::call_VM(Register oop_result,
1027 address entry_point,
1028 Register arg_1,
1029 bool check_exceptions) {
1030 Label C, E;
1031 call(C, relocInfo::none);
1032 jmp(E);
1033
1034 bind(C);
1035 pass_arg1(this, arg_1);
1036 call_VM_helper(oop_result, entry_point, 1, check_exceptions);
1037 ret(0);
1038
1039 bind(E);
1040 }
1041
1042 void MacroAssembler::call_VM(Register oop_result,
1043 address entry_point,
1044 Register arg_1,
1045 Register arg_2,
1046 bool check_exceptions) {
1047 Label C, E;
1048 call(C, relocInfo::none);
1049 jmp(E);
1050
1051 bind(C);
1052
1053 assert_different_registers(arg_1, c_rarg2);
1054
1055 pass_arg2(this, arg_2);
1056 pass_arg1(this, arg_1);
1057 call_VM_helper(oop_result, entry_point, 2, check_exceptions);
1058 ret(0);
1059
1060 bind(E);
1061 }
1062
1063 void MacroAssembler::call_VM(Register oop_result,
1064 address entry_point,
1065 Register arg_1,
1066 Register arg_2,
1067 Register arg_3,
1068 bool check_exceptions) {
1069 Label C, E;
1070 call(C, relocInfo::none);
1071 jmp(E);
1072
1073 bind(C);
1074
1075 assert_different_registers(arg_1, c_rarg2, c_rarg3);
1076 assert_different_registers(arg_2, c_rarg3);
1077 pass_arg3(this, arg_3);
1078 pass_arg2(this, arg_2);
1079 pass_arg1(this, arg_1);
1080 call_VM_helper(oop_result, entry_point, 3, check_exceptions);
1081 ret(0);
1082
1083 bind(E);
1084 }
1085
1086 void MacroAssembler::call_VM(Register oop_result,
1087 Register last_java_sp,
1088 address entry_point,
1089 int number_of_arguments,
1090 bool check_exceptions) {
1091 call_VM_base(oop_result, last_java_sp, entry_point, number_of_arguments, check_exceptions);
1092 }
1093
1094 void MacroAssembler::call_VM(Register oop_result,
1095 Register last_java_sp,
1096 address entry_point,
1097 Register arg_1,
1098 bool check_exceptions) {
1099 pass_arg1(this, arg_1);
1100 call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions);
1101 }
1102
1103 void MacroAssembler::call_VM(Register oop_result,
1104 Register last_java_sp,
1105 address entry_point,
1106 Register arg_1,
1107 Register arg_2,
1108 bool check_exceptions) {
1109
1110 assert_different_registers(arg_1, c_rarg2);
1111 pass_arg2(this, arg_2);
1112 pass_arg1(this, arg_1);
1113 call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions);
1114 }
1115
1116 void MacroAssembler::call_VM(Register oop_result,
1117 Register last_java_sp,
1118 address entry_point,
1119 Register arg_1,
1120 Register arg_2,
1121 Register arg_3,
1122 bool check_exceptions) {
1123 assert_different_registers(arg_1, c_rarg2, c_rarg3);
1124 assert_different_registers(arg_2, c_rarg3);
1125 pass_arg3(this, arg_3);
1126 pass_arg2(this, arg_2);
1127 pass_arg1(this, arg_1);
1128 call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions);
1129 }
1130
1131 void MacroAssembler::super_call_VM(Register oop_result,
1132 Register last_java_sp,
1133 address entry_point,
1134 int number_of_arguments,
1135 bool check_exceptions) {
1136 MacroAssembler::call_VM_base(oop_result, last_java_sp, entry_point, number_of_arguments, check_exceptions);
1137 }
1138
1139 void MacroAssembler::super_call_VM(Register oop_result,
1140 Register last_java_sp,
1141 address entry_point,
1142 Register arg_1,
1143 bool check_exceptions) {
1144 pass_arg1(this, arg_1);
1145 super_call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions);
1146 }
1147
1148 void MacroAssembler::super_call_VM(Register oop_result,
1149 Register last_java_sp,
1150 address entry_point,
1151 Register arg_1,
1152 Register arg_2,
1153 bool check_exceptions) {
1154
1155 assert_different_registers(arg_1, c_rarg2);
1156 pass_arg2(this, arg_2);
1157 pass_arg1(this, arg_1);
1158 super_call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions);
1159 }
1160
1161 void MacroAssembler::super_call_VM(Register oop_result,
1162 Register last_java_sp,
1163 address entry_point,
1164 Register arg_1,
1165 Register arg_2,
1166 Register arg_3,
1167 bool check_exceptions) {
1168 assert_different_registers(arg_1, c_rarg2, c_rarg3);
1169 assert_different_registers(arg_2, c_rarg3);
1170 pass_arg3(this, arg_3);
1171 pass_arg2(this, arg_2);
1172 pass_arg1(this, arg_1);
1173 super_call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions);
1174 }
1175
1176 void MacroAssembler::call_VM_base(Register oop_result,
1177 Register last_java_sp,
1178 address entry_point,
1179 int number_of_arguments,
1180 bool check_exceptions) {
1181 Register java_thread = r15_thread;
1182
1183 // determine last_java_sp register
1184 if (!last_java_sp->is_valid()) {
1185 last_java_sp = rsp;
1186 }
1187 // debugging support
1188 assert(number_of_arguments >= 0 , "cannot have negative number of arguments");
1189 #ifdef ASSERT
1190 // TraceBytecodes does not use r12 but saves it over the call, so don't verify
1191 // r12 is the heapbase.
1192 if (UseCompressedOops && !TraceBytecodes) verify_heapbase("call_VM_base: heap base corrupted?");
1193 #endif // ASSERT
1194
1195 assert(java_thread != oop_result , "cannot use the same register for java_thread & oop_result");
1196 assert(java_thread != last_java_sp, "cannot use the same register for java_thread & last_java_sp");
1197
1198 // push java thread (becomes first argument of C function)
1199
1200 mov(c_rarg0, r15_thread);
1201
1202 // set last Java frame before call
1203 assert(last_java_sp != rbp, "can't use ebp/rbp");
1204
1205 // Only interpreter should have to set fp
1206 set_last_Java_frame(last_java_sp, rbp, nullptr, rscratch1);
1207
1208 // do the call, remove parameters
1209 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
1210
1211 #ifdef ASSERT
1212 // Check that thread register is not clobbered.
1213 guarantee(java_thread != rax, "change this code");
1214 push(rax);
1215 { Label L;
1216 get_thread_slow(rax);
1217 cmpptr(java_thread, rax);
1218 jcc(Assembler::equal, L);
1219 STOP("MacroAssembler::call_VM_base: java_thread not callee saved?");
1220 bind(L);
1221 }
1222 pop(rax);
1223 #endif
1224
1225 // reset last Java frame
1226 // Only interpreter should have to clear fp
1227 reset_last_Java_frame(true);
1228
1229 // C++ interp handles this in the interpreter
1230 check_and_handle_popframe();
1231 check_and_handle_earlyret();
1232
1233 if (check_exceptions) {
1234 // check for pending exceptions (java_thread is set upon return)
1235 cmpptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
1236 // This used to conditionally jump to forward_exception however it is
1237 // possible if we relocate that the branch will not reach. So we must jump
1238 // around so we can always reach
1239
1240 Label ok;
1241 jcc(Assembler::equal, ok);
1242 jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
1243 bind(ok);
1244 }
1245
1246 // get oop result if there is one and reset the value in the thread
1247 if (oop_result->is_valid()) {
1248 get_vm_result_oop(oop_result);
1249 }
1250 }
1251
1252 void MacroAssembler::call_VM_helper(Register oop_result, address entry_point, int number_of_arguments, bool check_exceptions) {
1253 // Calculate the value for last_Java_sp somewhat subtle.
1254 // call_VM does an intermediate call which places a return address on
1255 // the stack just under the stack pointer as the user finished with it.
1256 // This allows use to retrieve last_Java_pc from last_Java_sp[-1].
1257
1258 // We've pushed one address, correct last_Java_sp
1259 lea(rax, Address(rsp, wordSize));
1260
1261 call_VM_base(oop_result, rax, entry_point, number_of_arguments, check_exceptions);
1262 }
1263
1264 // Use this method when MacroAssembler version of call_VM_leaf_base() should be called from Interpreter.
1265 void MacroAssembler::call_VM_leaf0(address entry_point) {
1266 MacroAssembler::call_VM_leaf_base(entry_point, 0);
1267 }
1268
1269 void MacroAssembler::call_VM_leaf(address entry_point, int number_of_arguments) {
1270 call_VM_leaf_base(entry_point, number_of_arguments);
1271 }
1272
1273 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0) {
1274 pass_arg0(this, arg_0);
1275 call_VM_leaf(entry_point, 1);
1276 }
1277
1278 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1) {
1279
1280 assert_different_registers(arg_0, c_rarg1);
1281 pass_arg1(this, arg_1);
1282 pass_arg0(this, arg_0);
1283 call_VM_leaf(entry_point, 2);
1284 }
1285
1286 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) {
1287 assert_different_registers(arg_0, c_rarg1, c_rarg2);
1288 assert_different_registers(arg_1, c_rarg2);
1289 pass_arg2(this, arg_2);
1290 pass_arg1(this, arg_1);
1291 pass_arg0(this, arg_0);
1292 call_VM_leaf(entry_point, 3);
1293 }
1294
1295 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2, Register arg_3) {
1296 assert_different_registers(arg_0, c_rarg1, c_rarg2, c_rarg3);
1297 assert_different_registers(arg_1, c_rarg2, c_rarg3);
1298 assert_different_registers(arg_2, c_rarg3);
1299 pass_arg3(this, arg_3);
1300 pass_arg2(this, arg_2);
1301 pass_arg1(this, arg_1);
1302 pass_arg0(this, arg_0);
1303 call_VM_leaf(entry_point, 3);
1304 }
1305
1306 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0) {
1307 pass_arg0(this, arg_0);
1308 MacroAssembler::call_VM_leaf_base(entry_point, 1);
1309 }
1310
1311 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1) {
1312 assert_different_registers(arg_0, c_rarg1);
1313 pass_arg1(this, arg_1);
1314 pass_arg0(this, arg_0);
1315 MacroAssembler::call_VM_leaf_base(entry_point, 2);
1316 }
1317
1318 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) {
1319 assert_different_registers(arg_0, c_rarg1, c_rarg2);
1320 assert_different_registers(arg_1, c_rarg2);
1321 pass_arg2(this, arg_2);
1322 pass_arg1(this, arg_1);
1323 pass_arg0(this, arg_0);
1324 MacroAssembler::call_VM_leaf_base(entry_point, 3);
1325 }
1326
1327 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2, Register arg_3) {
1328 assert_different_registers(arg_0, c_rarg1, c_rarg2, c_rarg3);
1329 assert_different_registers(arg_1, c_rarg2, c_rarg3);
1330 assert_different_registers(arg_2, c_rarg3);
1331 pass_arg3(this, arg_3);
1332 pass_arg2(this, arg_2);
1333 pass_arg1(this, arg_1);
1334 pass_arg0(this, arg_0);
1335 MacroAssembler::call_VM_leaf_base(entry_point, 4);
1336 }
1337
1338 void MacroAssembler::get_vm_result_oop(Register oop_result) {
1339 movptr(oop_result, Address(r15_thread, JavaThread::vm_result_oop_offset()));
1340 movptr(Address(r15_thread, JavaThread::vm_result_oop_offset()), NULL_WORD);
1341 verify_oop_msg(oop_result, "broken oop in call_VM_base");
1342 }
1343
1344 void MacroAssembler::get_vm_result_metadata(Register metadata_result) {
1345 movptr(metadata_result, Address(r15_thread, JavaThread::vm_result_metadata_offset()));
1346 movptr(Address(r15_thread, JavaThread::vm_result_metadata_offset()), NULL_WORD);
1347 }
1348
1349 void MacroAssembler::check_and_handle_earlyret() {
1350 }
1351
1352 void MacroAssembler::check_and_handle_popframe() {
1353 }
1354
1355 void MacroAssembler::cmp32(AddressLiteral src1, int32_t imm, Register rscratch) {
1356 assert(rscratch != noreg || always_reachable(src1), "missing");
1357
1358 if (reachable(src1)) {
1359 cmpl(as_Address(src1), imm);
1360 } else {
1361 lea(rscratch, src1);
1362 cmpl(Address(rscratch, 0), imm);
1363 }
1364 }
1365
1366 void MacroAssembler::cmp32(Register src1, AddressLiteral src2, Register rscratch) {
1367 assert(!src2.is_lval(), "use cmpptr");
1368 assert(rscratch != noreg || always_reachable(src2), "missing");
1369
1370 if (reachable(src2)) {
1371 cmpl(src1, as_Address(src2));
1372 } else {
1373 lea(rscratch, src2);
1374 cmpl(src1, Address(rscratch, 0));
1375 }
1376 }
1377
1378 void MacroAssembler::cmp32(Register src1, int32_t imm) {
1379 Assembler::cmpl(src1, imm);
1380 }
1381
1382 void MacroAssembler::cmp32(Register src1, Address src2) {
1383 Assembler::cmpl(src1, src2);
1384 }
1385
1386 void MacroAssembler::cmpsd2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) {
1387 ucomisd(opr1, opr2);
1388
1389 Label L;
1390 if (unordered_is_less) {
1391 movl(dst, -1);
1392 jcc(Assembler::parity, L);
1393 jcc(Assembler::below , L);
1394 movl(dst, 0);
1395 jcc(Assembler::equal , L);
1396 increment(dst);
1397 } else { // unordered is greater
1398 movl(dst, 1);
1399 jcc(Assembler::parity, L);
1400 jcc(Assembler::above , L);
1401 movl(dst, 0);
1402 jcc(Assembler::equal , L);
1403 decrementl(dst);
1404 }
1405 bind(L);
1406 }
1407
1408 void MacroAssembler::cmpss2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) {
1409 ucomiss(opr1, opr2);
1410
1411 Label L;
1412 if (unordered_is_less) {
1413 movl(dst, -1);
1414 jcc(Assembler::parity, L);
1415 jcc(Assembler::below , L);
1416 movl(dst, 0);
1417 jcc(Assembler::equal , L);
1418 increment(dst);
1419 } else { // unordered is greater
1420 movl(dst, 1);
1421 jcc(Assembler::parity, L);
1422 jcc(Assembler::above , L);
1423 movl(dst, 0);
1424 jcc(Assembler::equal , L);
1425 decrementl(dst);
1426 }
1427 bind(L);
1428 }
1429
1430
1431 void MacroAssembler::cmp8(AddressLiteral src1, int imm, Register rscratch) {
1432 assert(rscratch != noreg || always_reachable(src1), "missing");
1433
1434 if (reachable(src1)) {
1435 cmpb(as_Address(src1), imm);
1436 } else {
1437 lea(rscratch, src1);
1438 cmpb(Address(rscratch, 0), imm);
1439 }
1440 }
1441
1442 void MacroAssembler::cmpptr(Register src1, AddressLiteral src2, Register rscratch) {
1443 assert(rscratch != noreg || always_reachable(src2), "missing");
1444
1445 if (src2.is_lval()) {
1446 movptr(rscratch, src2);
1447 Assembler::cmpq(src1, rscratch);
1448 } else if (reachable(src2)) {
1449 cmpq(src1, as_Address(src2));
1450 } else {
1451 lea(rscratch, src2);
1452 Assembler::cmpq(src1, Address(rscratch, 0));
1453 }
1454 }
1455
1456 void MacroAssembler::cmpptr(Address src1, AddressLiteral src2, Register rscratch) {
1457 assert(src2.is_lval(), "not a mem-mem compare");
1458 // moves src2's literal address
1459 movptr(rscratch, src2);
1460 Assembler::cmpq(src1, rscratch);
1461 }
1462
1463 void MacroAssembler::cmpoop(Register src1, Register src2) {
1464 cmpptr(src1, src2);
1465 }
1466
1467 void MacroAssembler::cmpoop(Register src1, Address src2) {
1468 cmpptr(src1, src2);
1469 }
1470
1471 void MacroAssembler::cmpoop(Register src1, jobject src2, Register rscratch) {
1472 movoop(rscratch, src2);
1473 cmpptr(src1, rscratch);
1474 }
1475
1476 void MacroAssembler::locked_cmpxchgptr(Register reg, AddressLiteral adr, Register rscratch) {
1477 assert(rscratch != noreg || always_reachable(adr), "missing");
1478
1479 if (reachable(adr)) {
1480 lock();
1481 cmpxchgptr(reg, as_Address(adr));
1482 } else {
1483 lea(rscratch, adr);
1484 lock();
1485 cmpxchgptr(reg, Address(rscratch, 0));
1486 }
1487 }
1488
1489 void MacroAssembler::cmpxchgptr(Register reg, Address adr) {
1490 cmpxchgq(reg, adr);
1491 }
1492
1493 void MacroAssembler::comisd(XMMRegister dst, AddressLiteral src, Register rscratch) {
1494 assert(rscratch != noreg || always_reachable(src), "missing");
1495
1496 if (reachable(src)) {
1497 Assembler::comisd(dst, as_Address(src));
1498 } else {
1499 lea(rscratch, src);
1500 Assembler::comisd(dst, Address(rscratch, 0));
1501 }
1502 }
1503
1504 void MacroAssembler::comiss(XMMRegister dst, AddressLiteral src, Register rscratch) {
1505 assert(rscratch != noreg || always_reachable(src), "missing");
1506
1507 if (reachable(src)) {
1508 Assembler::comiss(dst, as_Address(src));
1509 } else {
1510 lea(rscratch, src);
1511 Assembler::comiss(dst, Address(rscratch, 0));
1512 }
1513 }
1514
1515
1516 void MacroAssembler::cond_inc32(Condition cond, AddressLiteral counter_addr, Register rscratch) {
1517 assert(rscratch != noreg || always_reachable(counter_addr), "missing");
1518
1519 Condition negated_cond = negate_condition(cond);
1520 Label L;
1521 jcc(negated_cond, L);
1522 pushf(); // Preserve flags
1523 atomic_incl(counter_addr, rscratch);
1524 popf();
1525 bind(L);
1526 }
1527
1528 int MacroAssembler::corrected_idivl(Register reg) {
1529 // Full implementation of Java idiv and irem; checks for
1530 // special case as described in JVM spec., p.243 & p.271.
1531 // The function returns the (pc) offset of the idivl
1532 // instruction - may be needed for implicit exceptions.
1533 //
1534 // normal case special case
1535 //
1536 // input : rax,: dividend min_int
1537 // reg: divisor (may not be rax,/rdx) -1
1538 //
1539 // output: rax,: quotient (= rax, idiv reg) min_int
1540 // rdx: remainder (= rax, irem reg) 0
1541 assert(reg != rax && reg != rdx, "reg cannot be rax, or rdx register");
1542 const int min_int = 0x80000000;
1543 Label normal_case, special_case;
1544
1545 // check for special case
1546 cmpl(rax, min_int);
1547 jcc(Assembler::notEqual, normal_case);
1548 xorl(rdx, rdx); // prepare rdx for possible special case (where remainder = 0)
1549 cmpl(reg, -1);
1550 jcc(Assembler::equal, special_case);
1551
1552 // handle normal case
1553 bind(normal_case);
1554 cdql();
1555 int idivl_offset = offset();
1556 idivl(reg);
1557
1558 // normal and special case exit
1559 bind(special_case);
1560
1561 return idivl_offset;
1562 }
1563
1564
1565
1566 void MacroAssembler::decrementl(Register reg, int value) {
1567 if (value == min_jint) {subl(reg, value) ; return; }
1568 if (value < 0) { incrementl(reg, -value); return; }
1569 if (value == 0) { ; return; }
1570 if (value == 1 && UseIncDec) { decl(reg) ; return; }
1571 /* else */ { subl(reg, value) ; return; }
1572 }
1573
1574 void MacroAssembler::decrementl(Address dst, int value) {
1575 if (value == min_jint) {subl(dst, value) ; return; }
1576 if (value < 0) { incrementl(dst, -value); return; }
1577 if (value == 0) { ; return; }
1578 if (value == 1 && UseIncDec) { decl(dst) ; return; }
1579 /* else */ { subl(dst, value) ; return; }
1580 }
1581
1582 void MacroAssembler::division_with_shift (Register reg, int shift_value) {
1583 assert(shift_value > 0, "illegal shift value");
1584 Label _is_positive;
1585 testl (reg, reg);
1586 jcc (Assembler::positive, _is_positive);
1587 int offset = (1 << shift_value) - 1 ;
1588
1589 if (offset == 1) {
1590 incrementl(reg);
1591 } else {
1592 addl(reg, offset);
1593 }
1594
1595 bind (_is_positive);
1596 sarl(reg, shift_value);
1597 }
1598
1599 void MacroAssembler::divsd(XMMRegister dst, AddressLiteral src, Register rscratch) {
1600 assert(rscratch != noreg || always_reachable(src), "missing");
1601
1602 if (reachable(src)) {
1603 Assembler::divsd(dst, as_Address(src));
1604 } else {
1605 lea(rscratch, src);
1606 Assembler::divsd(dst, Address(rscratch, 0));
1607 }
1608 }
1609
1610 void MacroAssembler::divss(XMMRegister dst, AddressLiteral src, Register rscratch) {
1611 assert(rscratch != noreg || always_reachable(src), "missing");
1612
1613 if (reachable(src)) {
1614 Assembler::divss(dst, as_Address(src));
1615 } else {
1616 lea(rscratch, src);
1617 Assembler::divss(dst, Address(rscratch, 0));
1618 }
1619 }
1620
1621 void MacroAssembler::enter() {
1622 push(rbp);
1623 mov(rbp, rsp);
1624 }
1625
1626 void MacroAssembler::post_call_nop() {
1627 if (!Continuations::enabled()) {
1628 return;
1629 }
1630 InstructionMark im(this);
1631 relocate(post_call_nop_Relocation::spec());
1632 InlineSkippedInstructionsCounter skipCounter(this);
1633 emit_int8((uint8_t)0x0f);
1634 emit_int8((uint8_t)0x1f);
1635 emit_int8((uint8_t)0x84);
1636 emit_int8((uint8_t)0x00);
1637 emit_int32(0x00);
1638 }
1639
1640 void MacroAssembler::mulpd(XMMRegister dst, AddressLiteral src, Register rscratch) {
1641 assert(rscratch != noreg || always_reachable(src), "missing");
1642 if (reachable(src)) {
1643 Assembler::mulpd(dst, as_Address(src));
1644 } else {
1645 lea(rscratch, src);
1646 Assembler::mulpd(dst, Address(rscratch, 0));
1647 }
1648 }
1649
1650 // dst = c = a * b + c
1651 void MacroAssembler::fmad(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c) {
1652 Assembler::vfmadd231sd(c, a, b);
1653 if (dst != c) {
1654 movdbl(dst, c);
1655 }
1656 }
1657
1658 // dst = c = a * b + c
1659 void MacroAssembler::fmaf(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c) {
1660 Assembler::vfmadd231ss(c, a, b);
1661 if (dst != c) {
1662 movflt(dst, c);
1663 }
1664 }
1665
1666 // dst = c = a * b + c
1667 void MacroAssembler::vfmad(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c, int vector_len) {
1668 Assembler::vfmadd231pd(c, a, b, vector_len);
1669 if (dst != c) {
1670 vmovdqu(dst, c);
1671 }
1672 }
1673
1674 // dst = c = a * b + c
1675 void MacroAssembler::vfmaf(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c, int vector_len) {
1676 Assembler::vfmadd231ps(c, a, b, vector_len);
1677 if (dst != c) {
1678 vmovdqu(dst, c);
1679 }
1680 }
1681
1682 // dst = c = a * b + c
1683 void MacroAssembler::vfmad(XMMRegister dst, XMMRegister a, Address b, XMMRegister c, int vector_len) {
1684 Assembler::vfmadd231pd(c, a, b, vector_len);
1685 if (dst != c) {
1686 vmovdqu(dst, c);
1687 }
1688 }
1689
1690 // dst = c = a * b + c
1691 void MacroAssembler::vfmaf(XMMRegister dst, XMMRegister a, Address b, XMMRegister c, int vector_len) {
1692 Assembler::vfmadd231ps(c, a, b, vector_len);
1693 if (dst != c) {
1694 vmovdqu(dst, c);
1695 }
1696 }
1697
1698 void MacroAssembler::incrementl(AddressLiteral dst, Register rscratch) {
1699 assert(rscratch != noreg || always_reachable(dst), "missing");
1700
1701 if (reachable(dst)) {
1702 incrementl(as_Address(dst));
1703 } else {
1704 lea(rscratch, dst);
1705 incrementl(Address(rscratch, 0));
1706 }
1707 }
1708
1709 void MacroAssembler::incrementl(ArrayAddress dst, Register rscratch) {
1710 incrementl(as_Address(dst, rscratch));
1711 }
1712
1713 void MacroAssembler::incrementl(Register reg, int value) {
1714 if (value == min_jint) {addl(reg, value) ; return; }
1715 if (value < 0) { decrementl(reg, -value); return; }
1716 if (value == 0) { ; return; }
1717 if (value == 1 && UseIncDec) { incl(reg) ; return; }
1718 /* else */ { addl(reg, value) ; return; }
1719 }
1720
1721 void MacroAssembler::incrementl(Address dst, int value) {
1722 if (value == min_jint) {addl(dst, value) ; return; }
1723 if (value < 0) { decrementl(dst, -value); return; }
1724 if (value == 0) { ; return; }
1725 if (value == 1 && UseIncDec) { incl(dst) ; return; }
1726 /* else */ { addl(dst, value) ; return; }
1727 }
1728
1729 void MacroAssembler::jump(AddressLiteral dst, Register rscratch) {
1730 assert(rscratch != noreg || always_reachable(dst), "missing");
1731 assert(!dst.rspec().reloc()->is_data(), "should not use ExternalAddress for jump");
1732 if (reachable(dst)) {
1733 jmp_literal(dst.target(), dst.rspec());
1734 } else {
1735 lea(rscratch, dst);
1736 jmp(rscratch);
1737 }
1738 }
1739
1740 void MacroAssembler::jump_cc(Condition cc, AddressLiteral dst, Register rscratch) {
1741 assert(rscratch != noreg || always_reachable(dst), "missing");
1742 assert(!dst.rspec().reloc()->is_data(), "should not use ExternalAddress for jump_cc");
1743 if (reachable(dst)) {
1744 InstructionMark im(this);
1745 relocate(dst.reloc());
1746 const int short_size = 2;
1747 const int long_size = 6;
1748 int offs = (intptr_t)dst.target() - ((intptr_t)pc());
1749 if (dst.reloc() == relocInfo::none && is8bit(offs - short_size)) {
1750 // 0111 tttn #8-bit disp
1751 emit_int8(0x70 | cc);
1752 emit_int8((offs - short_size) & 0xFF);
1753 } else {
1754 // 0000 1111 1000 tttn #32-bit disp
1755 emit_int8(0x0F);
1756 emit_int8((unsigned char)(0x80 | cc));
1757 emit_int32(offs - long_size);
1758 }
1759 } else {
1760 #ifdef ASSERT
1761 warning("reversing conditional branch");
1762 #endif /* ASSERT */
1763 Label skip;
1764 jccb(reverse[cc], skip);
1765 lea(rscratch, dst);
1766 Assembler::jmp(rscratch);
1767 bind(skip);
1768 }
1769 }
1770
1771 void MacroAssembler::cmp32_mxcsr_std(Address mxcsr_save, Register tmp, Register rscratch) {
1772 ExternalAddress mxcsr_std(StubRoutines::x86::addr_mxcsr_std());
1773 assert(rscratch != noreg || always_reachable(mxcsr_std), "missing");
1774
1775 stmxcsr(mxcsr_save);
1776 movl(tmp, mxcsr_save);
1777 if (EnableX86ECoreOpts) {
1778 // The mxcsr_std has status bits set for performance on ECore
1779 orl(tmp, 0x003f);
1780 } else {
1781 // Mask out status bits (only check control and mask bits)
1782 andl(tmp, 0xFFC0);
1783 }
1784 cmp32(tmp, mxcsr_std, rscratch);
1785 }
1786
1787 void MacroAssembler::ldmxcsr(AddressLiteral src, Register rscratch) {
1788 assert(rscratch != noreg || always_reachable(src), "missing");
1789
1790 if (reachable(src)) {
1791 Assembler::ldmxcsr(as_Address(src));
1792 } else {
1793 lea(rscratch, src);
1794 Assembler::ldmxcsr(Address(rscratch, 0));
1795 }
1796 }
1797
1798 int MacroAssembler::load_signed_byte(Register dst, Address src) {
1799 int off = offset();
1800 movsbl(dst, src); // movsxb
1801 return off;
1802 }
1803
1804 // Note: load_signed_short used to be called load_signed_word.
1805 // Although the 'w' in x86 opcodes refers to the term "word" in the assembler
1806 // manual, which means 16 bits, that usage is found nowhere in HotSpot code.
1807 // The term "word" in HotSpot means a 32- or 64-bit machine word.
1808 int MacroAssembler::load_signed_short(Register dst, Address src) {
1809 // This is dubious to me since it seems safe to do a signed 16 => 64 bit
1810 // version but this is what 64bit has always done. This seems to imply
1811 // that users are only using 32bits worth.
1812 int off = offset();
1813 movswl(dst, src); // movsxw
1814 return off;
1815 }
1816
1817 int MacroAssembler::load_unsigned_byte(Register dst, Address src) {
1818 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16,
1819 // and "3.9 Partial Register Penalties", p. 22).
1820 int off = offset();
1821 movzbl(dst, src); // movzxb
1822 return off;
1823 }
1824
1825 // Note: load_unsigned_short used to be called load_unsigned_word.
1826 int MacroAssembler::load_unsigned_short(Register dst, Address src) {
1827 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16,
1828 // and "3.9 Partial Register Penalties", p. 22).
1829 int off = offset();
1830 movzwl(dst, src); // movzxw
1831 return off;
1832 }
1833
1834 void MacroAssembler::load_sized_value(Register dst, Address src, size_t size_in_bytes, bool is_signed, Register dst2) {
1835 switch (size_in_bytes) {
1836 case 8: movq(dst, src); break;
1837 case 4: movl(dst, src); break;
1838 case 2: is_signed ? load_signed_short(dst, src) : load_unsigned_short(dst, src); break;
1839 case 1: is_signed ? load_signed_byte( dst, src) : load_unsigned_byte( dst, src); break;
1840 default: ShouldNotReachHere();
1841 }
1842 }
1843
1844 void MacroAssembler::store_sized_value(Address dst, Register src, size_t size_in_bytes, Register src2) {
1845 switch (size_in_bytes) {
1846 case 8: movq(dst, src); break;
1847 case 4: movl(dst, src); break;
1848 case 2: movw(dst, src); break;
1849 case 1: movb(dst, src); break;
1850 default: ShouldNotReachHere();
1851 }
1852 }
1853
1854 void MacroAssembler::mov32(AddressLiteral dst, Register src, Register rscratch) {
1855 assert(rscratch != noreg || always_reachable(dst), "missing");
1856
1857 if (reachable(dst)) {
1858 movl(as_Address(dst), src);
1859 } else {
1860 lea(rscratch, dst);
1861 movl(Address(rscratch, 0), src);
1862 }
1863 }
1864
1865 void MacroAssembler::mov32(Register dst, AddressLiteral src) {
1866 if (reachable(src)) {
1867 movl(dst, as_Address(src));
1868 } else {
1869 lea(dst, src);
1870 movl(dst, Address(dst, 0));
1871 }
1872 }
1873
1874 // C++ bool manipulation
1875
1876 void MacroAssembler::movbool(Register dst, Address src) {
1877 if(sizeof(bool) == 1)
1878 movb(dst, src);
1879 else if(sizeof(bool) == 2)
1880 movw(dst, src);
1881 else if(sizeof(bool) == 4)
1882 movl(dst, src);
1883 else
1884 // unsupported
1885 ShouldNotReachHere();
1886 }
1887
1888 void MacroAssembler::movbool(Address dst, bool boolconst) {
1889 if(sizeof(bool) == 1)
1890 movb(dst, (int) boolconst);
1891 else if(sizeof(bool) == 2)
1892 movw(dst, (int) boolconst);
1893 else if(sizeof(bool) == 4)
1894 movl(dst, (int) boolconst);
1895 else
1896 // unsupported
1897 ShouldNotReachHere();
1898 }
1899
1900 void MacroAssembler::movbool(Address dst, Register src) {
1901 if(sizeof(bool) == 1)
1902 movb(dst, src);
1903 else if(sizeof(bool) == 2)
1904 movw(dst, src);
1905 else if(sizeof(bool) == 4)
1906 movl(dst, src);
1907 else
1908 // unsupported
1909 ShouldNotReachHere();
1910 }
1911
1912 void MacroAssembler::movdl(XMMRegister dst, AddressLiteral src, Register rscratch) {
1913 assert(rscratch != noreg || always_reachable(src), "missing");
1914
1915 if (reachable(src)) {
1916 movdl(dst, as_Address(src));
1917 } else {
1918 lea(rscratch, src);
1919 movdl(dst, Address(rscratch, 0));
1920 }
1921 }
1922
1923 void MacroAssembler::movq(XMMRegister dst, AddressLiteral src, Register rscratch) {
1924 assert(rscratch != noreg || always_reachable(src), "missing");
1925
1926 if (reachable(src)) {
1927 movq(dst, as_Address(src));
1928 } else {
1929 lea(rscratch, src);
1930 movq(dst, Address(rscratch, 0));
1931 }
1932 }
1933
1934 void MacroAssembler::movdbl(XMMRegister dst, AddressLiteral src, Register rscratch) {
1935 assert(rscratch != noreg || always_reachable(src), "missing");
1936
1937 if (reachable(src)) {
1938 if (UseXmmLoadAndClearUpper) {
1939 movsd (dst, as_Address(src));
1940 } else {
1941 movlpd(dst, as_Address(src));
1942 }
1943 } else {
1944 lea(rscratch, src);
1945 if (UseXmmLoadAndClearUpper) {
1946 movsd (dst, Address(rscratch, 0));
1947 } else {
1948 movlpd(dst, Address(rscratch, 0));
1949 }
1950 }
1951 }
1952
1953 void MacroAssembler::movflt(XMMRegister dst, AddressLiteral src, Register rscratch) {
1954 assert(rscratch != noreg || always_reachable(src), "missing");
1955
1956 if (reachable(src)) {
1957 movss(dst, as_Address(src));
1958 } else {
1959 lea(rscratch, src);
1960 movss(dst, Address(rscratch, 0));
1961 }
1962 }
1963
1964 void MacroAssembler::movptr(Register dst, Register src) {
1965 movq(dst, src);
1966 }
1967
1968 void MacroAssembler::movptr(Register dst, Address src) {
1969 movq(dst, src);
1970 }
1971
1972 // src should NEVER be a real pointer. Use AddressLiteral for true pointers
1973 void MacroAssembler::movptr(Register dst, intptr_t src) {
1974 if (is_uimm32(src)) {
1975 movl(dst, checked_cast<uint32_t>(src));
1976 } else if (is_simm32(src)) {
1977 movq(dst, checked_cast<int32_t>(src));
1978 } else {
1979 mov64(dst, src);
1980 }
1981 }
1982
1983 void MacroAssembler::movptr(Address dst, Register src) {
1984 movq(dst, src);
1985 }
1986
1987 void MacroAssembler::movptr(Address dst, int32_t src) {
1988 movslq(dst, src);
1989 }
1990
1991 void MacroAssembler::movdqu(Address dst, XMMRegister src) {
1992 assert(((src->encoding() < 16) || VM_Version::supports_avx512vl()),"XMM register should be 0-15");
1993 Assembler::movdqu(dst, src);
1994 }
1995
1996 void MacroAssembler::movdqu(XMMRegister dst, Address src) {
1997 assert(((dst->encoding() < 16) || VM_Version::supports_avx512vl()),"XMM register should be 0-15");
1998 Assembler::movdqu(dst, src);
1999 }
2000
2001 void MacroAssembler::movdqu(XMMRegister dst, XMMRegister src) {
2002 assert(((dst->encoding() < 16 && src->encoding() < 16) || VM_Version::supports_avx512vl()),"XMM register should be 0-15");
2003 Assembler::movdqu(dst, src);
2004 }
2005
2006 void MacroAssembler::movdqu(XMMRegister dst, AddressLiteral src, Register rscratch) {
2007 assert(rscratch != noreg || always_reachable(src), "missing");
2008
2009 if (reachable(src)) {
2010 movdqu(dst, as_Address(src));
2011 } else {
2012 lea(rscratch, src);
2013 movdqu(dst, Address(rscratch, 0));
2014 }
2015 }
2016
2017 void MacroAssembler::vmovdqu(Address dst, XMMRegister src) {
2018 assert(((src->encoding() < 16) || VM_Version::supports_avx512vl()),"XMM register should be 0-15");
2019 Assembler::vmovdqu(dst, src);
2020 }
2021
2022 void MacroAssembler::vmovdqu(XMMRegister dst, Address src) {
2023 assert(((dst->encoding() < 16) || VM_Version::supports_avx512vl()),"XMM register should be 0-15");
2024 Assembler::vmovdqu(dst, src);
2025 }
2026
2027 void MacroAssembler::vmovdqu(XMMRegister dst, XMMRegister src) {
2028 assert(((dst->encoding() < 16 && src->encoding() < 16) || VM_Version::supports_avx512vl()),"XMM register should be 0-15");
2029 Assembler::vmovdqu(dst, src);
2030 }
2031
2032 void MacroAssembler::vmovdqu(XMMRegister dst, AddressLiteral src, Register rscratch) {
2033 assert(rscratch != noreg || always_reachable(src), "missing");
2034
2035 if (reachable(src)) {
2036 vmovdqu(dst, as_Address(src));
2037 }
2038 else {
2039 lea(rscratch, src);
2040 vmovdqu(dst, Address(rscratch, 0));
2041 }
2042 }
2043
2044 void MacroAssembler::vmovdqu(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2045 assert(rscratch != noreg || always_reachable(src), "missing");
2046
2047 if (vector_len == AVX_512bit) {
2048 evmovdquq(dst, src, AVX_512bit, rscratch);
2049 } else if (vector_len == AVX_256bit) {
2050 vmovdqu(dst, src, rscratch);
2051 } else {
2052 movdqu(dst, src, rscratch);
2053 }
2054 }
2055
2056 void MacroAssembler::vmovdqu(XMMRegister dst, XMMRegister src, int vector_len) {
2057 if (vector_len == AVX_512bit) {
2058 evmovdquq(dst, src, AVX_512bit);
2059 } else if (vector_len == AVX_256bit) {
2060 vmovdqu(dst, src);
2061 } else {
2062 movdqu(dst, src);
2063 }
2064 }
2065
2066 void MacroAssembler::vmovdqu(Address dst, XMMRegister src, int vector_len) {
2067 if (vector_len == AVX_512bit) {
2068 evmovdquq(dst, src, AVX_512bit);
2069 } else if (vector_len == AVX_256bit) {
2070 vmovdqu(dst, src);
2071 } else {
2072 movdqu(dst, src);
2073 }
2074 }
2075
2076 void MacroAssembler::vmovdqu(XMMRegister dst, Address src, int vector_len) {
2077 if (vector_len == AVX_512bit) {
2078 evmovdquq(dst, src, AVX_512bit);
2079 } else if (vector_len == AVX_256bit) {
2080 vmovdqu(dst, src);
2081 } else {
2082 movdqu(dst, src);
2083 }
2084 }
2085
2086 void MacroAssembler::vmovdqa(XMMRegister dst, AddressLiteral src, Register rscratch) {
2087 assert(rscratch != noreg || always_reachable(src), "missing");
2088
2089 if (reachable(src)) {
2090 vmovdqa(dst, as_Address(src));
2091 }
2092 else {
2093 lea(rscratch, src);
2094 vmovdqa(dst, Address(rscratch, 0));
2095 }
2096 }
2097
2098 void MacroAssembler::vmovdqa(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2099 assert(rscratch != noreg || always_reachable(src), "missing");
2100
2101 if (vector_len == AVX_512bit) {
2102 evmovdqaq(dst, src, AVX_512bit, rscratch);
2103 } else if (vector_len == AVX_256bit) {
2104 vmovdqa(dst, src, rscratch);
2105 } else {
2106 movdqa(dst, src, rscratch);
2107 }
2108 }
2109
2110 void MacroAssembler::kmov(KRegister dst, Address src) {
2111 if (VM_Version::supports_avx512bw()) {
2112 kmovql(dst, src);
2113 } else {
2114 assert(VM_Version::supports_evex(), "");
2115 kmovwl(dst, src);
2116 }
2117 }
2118
2119 void MacroAssembler::kmov(Address dst, KRegister src) {
2120 if (VM_Version::supports_avx512bw()) {
2121 kmovql(dst, src);
2122 } else {
2123 assert(VM_Version::supports_evex(), "");
2124 kmovwl(dst, src);
2125 }
2126 }
2127
2128 void MacroAssembler::kmov(KRegister dst, KRegister src) {
2129 if (VM_Version::supports_avx512bw()) {
2130 kmovql(dst, src);
2131 } else {
2132 assert(VM_Version::supports_evex(), "");
2133 kmovwl(dst, src);
2134 }
2135 }
2136
2137 void MacroAssembler::kmov(Register dst, KRegister src) {
2138 if (VM_Version::supports_avx512bw()) {
2139 kmovql(dst, src);
2140 } else {
2141 assert(VM_Version::supports_evex(), "");
2142 kmovwl(dst, src);
2143 }
2144 }
2145
2146 void MacroAssembler::kmov(KRegister dst, Register src) {
2147 if (VM_Version::supports_avx512bw()) {
2148 kmovql(dst, src);
2149 } else {
2150 assert(VM_Version::supports_evex(), "");
2151 kmovwl(dst, src);
2152 }
2153 }
2154
2155 void MacroAssembler::kmovql(KRegister dst, AddressLiteral src, Register rscratch) {
2156 assert(rscratch != noreg || always_reachable(src), "missing");
2157
2158 if (reachable(src)) {
2159 kmovql(dst, as_Address(src));
2160 } else {
2161 lea(rscratch, src);
2162 kmovql(dst, Address(rscratch, 0));
2163 }
2164 }
2165
2166 void MacroAssembler::kmovwl(KRegister dst, AddressLiteral src, Register rscratch) {
2167 assert(rscratch != noreg || always_reachable(src), "missing");
2168
2169 if (reachable(src)) {
2170 kmovwl(dst, as_Address(src));
2171 } else {
2172 lea(rscratch, src);
2173 kmovwl(dst, Address(rscratch, 0));
2174 }
2175 }
2176
2177 void MacroAssembler::evmovdqub(XMMRegister dst, KRegister mask, AddressLiteral src, bool merge,
2178 int vector_len, Register rscratch) {
2179 assert(rscratch != noreg || always_reachable(src), "missing");
2180
2181 if (reachable(src)) {
2182 Assembler::evmovdqub(dst, mask, as_Address(src), merge, vector_len);
2183 } else {
2184 lea(rscratch, src);
2185 Assembler::evmovdqub(dst, mask, Address(rscratch, 0), merge, vector_len);
2186 }
2187 }
2188
2189 void MacroAssembler::evmovdquw(XMMRegister dst, KRegister mask, AddressLiteral src, bool merge,
2190 int vector_len, Register rscratch) {
2191 assert(rscratch != noreg || always_reachable(src), "missing");
2192
2193 if (reachable(src)) {
2194 Assembler::evmovdquw(dst, mask, as_Address(src), merge, vector_len);
2195 } else {
2196 lea(rscratch, src);
2197 Assembler::evmovdquw(dst, mask, Address(rscratch, 0), merge, vector_len);
2198 }
2199 }
2200
2201 void MacroAssembler::evmovdqul(XMMRegister dst, KRegister mask, AddressLiteral src, bool merge, int vector_len, Register rscratch) {
2202 assert(rscratch != noreg || always_reachable(src), "missing");
2203
2204 if (reachable(src)) {
2205 Assembler::evmovdqul(dst, mask, as_Address(src), merge, vector_len);
2206 } else {
2207 lea(rscratch, src);
2208 Assembler::evmovdqul(dst, mask, Address(rscratch, 0), merge, vector_len);
2209 }
2210 }
2211
2212 void MacroAssembler::evmovdquq(XMMRegister dst, KRegister mask, AddressLiteral src, bool merge, int vector_len, Register rscratch) {
2213 assert(rscratch != noreg || always_reachable(src), "missing");
2214
2215 if (reachable(src)) {
2216 Assembler::evmovdquq(dst, mask, as_Address(src), merge, vector_len);
2217 } else {
2218 lea(rscratch, src);
2219 Assembler::evmovdquq(dst, mask, Address(rscratch, 0), merge, vector_len);
2220 }
2221 }
2222
2223 void MacroAssembler::evmovdquq(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2224 assert(rscratch != noreg || always_reachable(src), "missing");
2225
2226 if (reachable(src)) {
2227 Assembler::evmovdquq(dst, as_Address(src), vector_len);
2228 } else {
2229 lea(rscratch, src);
2230 Assembler::evmovdquq(dst, Address(rscratch, 0), vector_len);
2231 }
2232 }
2233
2234 void MacroAssembler::evmovdqaq(XMMRegister dst, KRegister mask, AddressLiteral src, bool merge, int vector_len, Register rscratch) {
2235 assert(rscratch != noreg || always_reachable(src), "missing");
2236
2237 if (reachable(src)) {
2238 Assembler::evmovdqaq(dst, mask, as_Address(src), merge, vector_len);
2239 } else {
2240 lea(rscratch, src);
2241 Assembler::evmovdqaq(dst, mask, Address(rscratch, 0), merge, vector_len);
2242 }
2243 }
2244
2245 void MacroAssembler::evmovdqaq(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2246 assert(rscratch != noreg || always_reachable(src), "missing");
2247
2248 if (reachable(src)) {
2249 Assembler::evmovdqaq(dst, as_Address(src), vector_len);
2250 } else {
2251 lea(rscratch, src);
2252 Assembler::evmovdqaq(dst, Address(rscratch, 0), vector_len);
2253 }
2254 }
2255
2256 void MacroAssembler::movapd(XMMRegister dst, AddressLiteral src, Register rscratch) {
2257 assert(rscratch != noreg || always_reachable(src), "missing");
2258
2259 if (reachable(src)) {
2260 Assembler::movapd(dst, as_Address(src));
2261 } else {
2262 lea(rscratch, src);
2263 Assembler::movapd(dst, Address(rscratch, 0));
2264 }
2265 }
2266
2267 void MacroAssembler::movdqa(XMMRegister dst, AddressLiteral src, Register rscratch) {
2268 assert(rscratch != noreg || always_reachable(src), "missing");
2269
2270 if (reachable(src)) {
2271 Assembler::movdqa(dst, as_Address(src));
2272 } else {
2273 lea(rscratch, src);
2274 Assembler::movdqa(dst, Address(rscratch, 0));
2275 }
2276 }
2277
2278 void MacroAssembler::movsd(XMMRegister dst, AddressLiteral src, Register rscratch) {
2279 assert(rscratch != noreg || always_reachable(src), "missing");
2280
2281 if (reachable(src)) {
2282 Assembler::movsd(dst, as_Address(src));
2283 } else {
2284 lea(rscratch, src);
2285 Assembler::movsd(dst, Address(rscratch, 0));
2286 }
2287 }
2288
2289 void MacroAssembler::movss(XMMRegister dst, AddressLiteral src, Register rscratch) {
2290 assert(rscratch != noreg || always_reachable(src), "missing");
2291
2292 if (reachable(src)) {
2293 Assembler::movss(dst, as_Address(src));
2294 } else {
2295 lea(rscratch, src);
2296 Assembler::movss(dst, Address(rscratch, 0));
2297 }
2298 }
2299
2300 void MacroAssembler::movddup(XMMRegister dst, AddressLiteral src, Register rscratch) {
2301 assert(rscratch != noreg || always_reachable(src), "missing");
2302
2303 if (reachable(src)) {
2304 Assembler::movddup(dst, as_Address(src));
2305 } else {
2306 lea(rscratch, src);
2307 Assembler::movddup(dst, Address(rscratch, 0));
2308 }
2309 }
2310
2311 void MacroAssembler::vmovddup(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2312 assert(rscratch != noreg || always_reachable(src), "missing");
2313
2314 if (reachable(src)) {
2315 Assembler::vmovddup(dst, as_Address(src), vector_len);
2316 } else {
2317 lea(rscratch, src);
2318 Assembler::vmovddup(dst, Address(rscratch, 0), vector_len);
2319 }
2320 }
2321
2322 void MacroAssembler::mulsd(XMMRegister dst, AddressLiteral src, Register rscratch) {
2323 assert(rscratch != noreg || always_reachable(src), "missing");
2324
2325 if (reachable(src)) {
2326 Assembler::mulsd(dst, as_Address(src));
2327 } else {
2328 lea(rscratch, src);
2329 Assembler::mulsd(dst, Address(rscratch, 0));
2330 }
2331 }
2332
2333 void MacroAssembler::mulss(XMMRegister dst, AddressLiteral src, Register rscratch) {
2334 assert(rscratch != noreg || always_reachable(src), "missing");
2335
2336 if (reachable(src)) {
2337 Assembler::mulss(dst, as_Address(src));
2338 } else {
2339 lea(rscratch, src);
2340 Assembler::mulss(dst, Address(rscratch, 0));
2341 }
2342 }
2343
2344 void MacroAssembler::null_check(Register reg, int offset) {
2345 if (needs_explicit_null_check(offset)) {
2346 // provoke OS null exception if reg is null by
2347 // accessing M[reg] w/o changing any (non-CC) registers
2348 // NOTE: cmpl is plenty here to provoke a segv
2349 cmpptr(rax, Address(reg, 0));
2350 // Note: should probably use testl(rax, Address(reg, 0));
2351 // may be shorter code (however, this version of
2352 // testl needs to be implemented first)
2353 } else {
2354 // nothing to do, (later) access of M[reg + offset]
2355 // will provoke OS null exception if reg is null
2356 }
2357 }
2358
2359 void MacroAssembler::os_breakpoint() {
2360 // instead of directly emitting a breakpoint, call os:breakpoint for better debugability
2361 // (e.g., MSVC can't call ps() otherwise)
2362 call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint)));
2363 }
2364
2365 void MacroAssembler::unimplemented(const char* what) {
2366 const char* buf = nullptr;
2367 {
2368 ResourceMark rm;
2369 stringStream ss;
2370 ss.print("unimplemented: %s", what);
2371 buf = code_string(ss.as_string());
2372 }
2373 stop(buf);
2374 }
2375
2376 #define XSTATE_BV 0x200
2377
2378 void MacroAssembler::pop_CPU_state() {
2379 pop_FPU_state();
2380 pop_IU_state();
2381 }
2382
2383 void MacroAssembler::pop_FPU_state() {
2384 fxrstor(Address(rsp, 0));
2385 addptr(rsp, FPUStateSizeInWords * wordSize);
2386 }
2387
2388 void MacroAssembler::pop_IU_state() {
2389 popa();
2390 addq(rsp, 8);
2391 popf();
2392 }
2393
2394 // Save Integer and Float state
2395 // Warning: Stack must be 16 byte aligned (64bit)
2396 void MacroAssembler::push_CPU_state() {
2397 push_IU_state();
2398 push_FPU_state();
2399 }
2400
2401 void MacroAssembler::push_FPU_state() {
2402 subptr(rsp, FPUStateSizeInWords * wordSize);
2403 fxsave(Address(rsp, 0));
2404 }
2405
2406 void MacroAssembler::push_IU_state() {
2407 // Push flags first because pusha kills them
2408 pushf();
2409 // Make sure rsp stays 16-byte aligned
2410 subq(rsp, 8);
2411 pusha();
2412 }
2413
2414 void MacroAssembler::push_cont_fastpath() {
2415 if (!Continuations::enabled()) return;
2416
2417 Label L_done;
2418 cmpptr(rsp, Address(r15_thread, JavaThread::cont_fastpath_offset()));
2419 jccb(Assembler::belowEqual, L_done);
2420 movptr(Address(r15_thread, JavaThread::cont_fastpath_offset()), rsp);
2421 bind(L_done);
2422 }
2423
2424 void MacroAssembler::pop_cont_fastpath() {
2425 if (!Continuations::enabled()) return;
2426
2427 Label L_done;
2428 cmpptr(rsp, Address(r15_thread, JavaThread::cont_fastpath_offset()));
2429 jccb(Assembler::below, L_done);
2430 movptr(Address(r15_thread, JavaThread::cont_fastpath_offset()), 0);
2431 bind(L_done);
2432 }
2433
2434 #ifdef ASSERT
2435 void MacroAssembler::stop_if_in_cont(Register cont, const char* name) {
2436 Label no_cont;
2437 movptr(cont, Address(r15_thread, JavaThread::cont_entry_offset()));
2438 testl(cont, cont);
2439 jcc(Assembler::zero, no_cont);
2440 stop(name);
2441 bind(no_cont);
2442 }
2443 #endif
2444
2445 void MacroAssembler::reset_last_Java_frame(bool clear_fp) { // determine java_thread register
2446 // we must set sp to zero to clear frame
2447 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), NULL_WORD);
2448 // must clear fp, so that compiled frames are not confused; it is
2449 // possible that we need it only for debugging
2450 if (clear_fp) {
2451 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()), NULL_WORD);
2452 }
2453 // Always clear the pc because it could have been set by make_walkable()
2454 movptr(Address(r15_thread, JavaThread::last_Java_pc_offset()), NULL_WORD);
2455 vzeroupper();
2456 }
2457
2458 void MacroAssembler::round_to(Register reg, int modulus) {
2459 addptr(reg, modulus - 1);
2460 andptr(reg, -modulus);
2461 }
2462
2463 void MacroAssembler::safepoint_poll(Label& slow_path, bool at_return, bool in_nmethod) {
2464 if (at_return) {
2465 // Note that when in_nmethod is set, the stack pointer is incremented before the poll. Therefore,
2466 // we may safely use rsp instead to perform the stack watermark check.
2467 cmpptr(in_nmethod ? rsp : rbp, Address(r15_thread, JavaThread::polling_word_offset()));
2468 jcc(Assembler::above, slow_path);
2469 return;
2470 }
2471 testb(Address(r15_thread, JavaThread::polling_word_offset()), SafepointMechanism::poll_bit());
2472 jcc(Assembler::notZero, slow_path); // handshake bit set implies poll
2473 }
2474
2475 // Calls to C land
2476 //
2477 // When entering C land, the rbp, & rsp of the last Java frame have to be recorded
2478 // in the (thread-local) JavaThread object. When leaving C land, the last Java fp
2479 // has to be reset to 0. This is required to allow proper stack traversal.
2480 void MacroAssembler::set_last_Java_frame(Register last_java_sp,
2481 Register last_java_fp,
2482 address last_java_pc,
2483 Register rscratch) {
2484 vzeroupper();
2485 // determine last_java_sp register
2486 if (!last_java_sp->is_valid()) {
2487 last_java_sp = rsp;
2488 }
2489 // last_java_fp is optional
2490 if (last_java_fp->is_valid()) {
2491 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()), last_java_fp);
2492 }
2493 // last_java_pc is optional
2494 if (last_java_pc != nullptr) {
2495 Address java_pc(r15_thread,
2496 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset());
2497 lea(java_pc, InternalAddress(last_java_pc), rscratch);
2498 }
2499 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), last_java_sp);
2500 }
2501
2502 void MacroAssembler::set_last_Java_frame(Register last_java_sp,
2503 Register last_java_fp,
2504 Label &L,
2505 Register scratch) {
2506 lea(scratch, L);
2507 movptr(Address(r15_thread, JavaThread::last_Java_pc_offset()), scratch);
2508 set_last_Java_frame(last_java_sp, last_java_fp, nullptr, scratch);
2509 }
2510
2511 void MacroAssembler::shlptr(Register dst, int imm8) {
2512 shlq(dst, imm8);
2513 }
2514
2515 void MacroAssembler::shrptr(Register dst, int imm8) {
2516 shrq(dst, imm8);
2517 }
2518
2519 void MacroAssembler::sign_extend_byte(Register reg) {
2520 movsbl(reg, reg); // movsxb
2521 }
2522
2523 void MacroAssembler::sign_extend_short(Register reg) {
2524 movswl(reg, reg); // movsxw
2525 }
2526
2527 void MacroAssembler::testl(Address dst, int32_t imm32) {
2528 if (imm32 >= 0 && is8bit(imm32)) {
2529 testb(dst, imm32);
2530 } else {
2531 Assembler::testl(dst, imm32);
2532 }
2533 }
2534
2535 void MacroAssembler::testl(Register dst, int32_t imm32) {
2536 if (imm32 >= 0 && is8bit(imm32) && dst->has_byte_register()) {
2537 testb(dst, imm32);
2538 } else {
2539 Assembler::testl(dst, imm32);
2540 }
2541 }
2542
2543 void MacroAssembler::testl(Register dst, AddressLiteral src) {
2544 assert(always_reachable(src), "Address should be reachable");
2545 testl(dst, as_Address(src));
2546 }
2547
2548 void MacroAssembler::testq(Address dst, int32_t imm32) {
2549 if (imm32 >= 0) {
2550 testl(dst, imm32);
2551 } else {
2552 Assembler::testq(dst, imm32);
2553 }
2554 }
2555
2556 void MacroAssembler::testq(Register dst, int32_t imm32) {
2557 if (imm32 >= 0) {
2558 testl(dst, imm32);
2559 } else {
2560 Assembler::testq(dst, imm32);
2561 }
2562 }
2563
2564 void MacroAssembler::pcmpeqb(XMMRegister dst, XMMRegister src) {
2565 assert(((dst->encoding() < 16 && src->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2566 Assembler::pcmpeqb(dst, src);
2567 }
2568
2569 void MacroAssembler::pcmpeqw(XMMRegister dst, XMMRegister src) {
2570 assert(((dst->encoding() < 16 && src->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2571 Assembler::pcmpeqw(dst, src);
2572 }
2573
2574 void MacroAssembler::pcmpestri(XMMRegister dst, Address src, int imm8) {
2575 assert((dst->encoding() < 16),"XMM register should be 0-15");
2576 Assembler::pcmpestri(dst, src, imm8);
2577 }
2578
2579 void MacroAssembler::pcmpestri(XMMRegister dst, XMMRegister src, int imm8) {
2580 assert((dst->encoding() < 16 && src->encoding() < 16),"XMM register should be 0-15");
2581 Assembler::pcmpestri(dst, src, imm8);
2582 }
2583
2584 void MacroAssembler::pmovzxbw(XMMRegister dst, XMMRegister src) {
2585 assert(((dst->encoding() < 16 && src->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2586 Assembler::pmovzxbw(dst, src);
2587 }
2588
2589 void MacroAssembler::pmovzxbw(XMMRegister dst, Address src) {
2590 assert(((dst->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2591 Assembler::pmovzxbw(dst, src);
2592 }
2593
2594 void MacroAssembler::pmovmskb(Register dst, XMMRegister src) {
2595 assert((src->encoding() < 16),"XMM register should be 0-15");
2596 Assembler::pmovmskb(dst, src);
2597 }
2598
2599 void MacroAssembler::ptest(XMMRegister dst, XMMRegister src) {
2600 assert((dst->encoding() < 16 && src->encoding() < 16),"XMM register should be 0-15");
2601 Assembler::ptest(dst, src);
2602 }
2603
2604 void MacroAssembler::sqrtss(XMMRegister dst, AddressLiteral src, Register rscratch) {
2605 assert(rscratch != noreg || always_reachable(src), "missing");
2606
2607 if (reachable(src)) {
2608 Assembler::sqrtss(dst, as_Address(src));
2609 } else {
2610 lea(rscratch, src);
2611 Assembler::sqrtss(dst, Address(rscratch, 0));
2612 }
2613 }
2614
2615 void MacroAssembler::subsd(XMMRegister dst, AddressLiteral src, Register rscratch) {
2616 assert(rscratch != noreg || always_reachable(src), "missing");
2617
2618 if (reachable(src)) {
2619 Assembler::subsd(dst, as_Address(src));
2620 } else {
2621 lea(rscratch, src);
2622 Assembler::subsd(dst, Address(rscratch, 0));
2623 }
2624 }
2625
2626 void MacroAssembler::roundsd(XMMRegister dst, AddressLiteral src, int32_t rmode, Register rscratch) {
2627 assert(rscratch != noreg || always_reachable(src), "missing");
2628
2629 if (reachable(src)) {
2630 Assembler::roundsd(dst, as_Address(src), rmode);
2631 } else {
2632 lea(rscratch, src);
2633 Assembler::roundsd(dst, Address(rscratch, 0), rmode);
2634 }
2635 }
2636
2637 void MacroAssembler::subss(XMMRegister dst, AddressLiteral src, Register rscratch) {
2638 assert(rscratch != noreg || always_reachable(src), "missing");
2639
2640 if (reachable(src)) {
2641 Assembler::subss(dst, as_Address(src));
2642 } else {
2643 lea(rscratch, src);
2644 Assembler::subss(dst, Address(rscratch, 0));
2645 }
2646 }
2647
2648 void MacroAssembler::ucomisd(XMMRegister dst, AddressLiteral src, Register rscratch) {
2649 assert(rscratch != noreg || always_reachable(src), "missing");
2650
2651 if (reachable(src)) {
2652 Assembler::ucomisd(dst, as_Address(src));
2653 } else {
2654 lea(rscratch, src);
2655 Assembler::ucomisd(dst, Address(rscratch, 0));
2656 }
2657 }
2658
2659 void MacroAssembler::ucomiss(XMMRegister dst, AddressLiteral src, Register rscratch) {
2660 assert(rscratch != noreg || always_reachable(src), "missing");
2661
2662 if (reachable(src)) {
2663 Assembler::ucomiss(dst, as_Address(src));
2664 } else {
2665 lea(rscratch, src);
2666 Assembler::ucomiss(dst, Address(rscratch, 0));
2667 }
2668 }
2669
2670 void MacroAssembler::xorpd(XMMRegister dst, AddressLiteral src, Register rscratch) {
2671 assert(rscratch != noreg || always_reachable(src), "missing");
2672
2673 // Used in sign-bit flipping with aligned address.
2674 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
2675
2676 if (UseAVX > 2 &&
2677 (!VM_Version::supports_avx512dq() || !VM_Version::supports_avx512vl()) &&
2678 (dst->encoding() >= 16)) {
2679 vpxor(dst, dst, src, Assembler::AVX_512bit, rscratch);
2680 } else if (reachable(src)) {
2681 Assembler::xorpd(dst, as_Address(src));
2682 } else {
2683 lea(rscratch, src);
2684 Assembler::xorpd(dst, Address(rscratch, 0));
2685 }
2686 }
2687
2688 void MacroAssembler::xorpd(XMMRegister dst, XMMRegister src) {
2689 if (UseAVX > 2 &&
2690 (!VM_Version::supports_avx512dq() || !VM_Version::supports_avx512vl()) &&
2691 ((dst->encoding() >= 16) || (src->encoding() >= 16))) {
2692 Assembler::vpxor(dst, dst, src, Assembler::AVX_512bit);
2693 } else {
2694 Assembler::xorpd(dst, src);
2695 }
2696 }
2697
2698 void MacroAssembler::xorps(XMMRegister dst, XMMRegister src) {
2699 if (UseAVX > 2 &&
2700 (!VM_Version::supports_avx512dq() || !VM_Version::supports_avx512vl()) &&
2701 ((dst->encoding() >= 16) || (src->encoding() >= 16))) {
2702 Assembler::vpxor(dst, dst, src, Assembler::AVX_512bit);
2703 } else {
2704 Assembler::xorps(dst, src);
2705 }
2706 }
2707
2708 void MacroAssembler::xorps(XMMRegister dst, AddressLiteral src, Register rscratch) {
2709 assert(rscratch != noreg || always_reachable(src), "missing");
2710
2711 // Used in sign-bit flipping with aligned address.
2712 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
2713
2714 if (UseAVX > 2 &&
2715 (!VM_Version::supports_avx512dq() || !VM_Version::supports_avx512vl()) &&
2716 (dst->encoding() >= 16)) {
2717 vpxor(dst, dst, src, Assembler::AVX_512bit, rscratch);
2718 } else if (reachable(src)) {
2719 Assembler::xorps(dst, as_Address(src));
2720 } else {
2721 lea(rscratch, src);
2722 Assembler::xorps(dst, Address(rscratch, 0));
2723 }
2724 }
2725
2726 void MacroAssembler::pshufb(XMMRegister dst, AddressLiteral src, Register rscratch) {
2727 assert(rscratch != noreg || always_reachable(src), "missing");
2728
2729 // Used in sign-bit flipping with aligned address.
2730 bool aligned_adr = (((intptr_t)src.target() & 15) == 0);
2731 assert((UseAVX > 0) || aligned_adr, "SSE mode requires address alignment 16 bytes");
2732 if (reachable(src)) {
2733 Assembler::pshufb(dst, as_Address(src));
2734 } else {
2735 lea(rscratch, src);
2736 Assembler::pshufb(dst, Address(rscratch, 0));
2737 }
2738 }
2739
2740 // AVX 3-operands instructions
2741
2742 void MacroAssembler::vaddsd(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
2743 assert(rscratch != noreg || always_reachable(src), "missing");
2744
2745 if (reachable(src)) {
2746 vaddsd(dst, nds, as_Address(src));
2747 } else {
2748 lea(rscratch, src);
2749 vaddsd(dst, nds, Address(rscratch, 0));
2750 }
2751 }
2752
2753 void MacroAssembler::vaddss(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
2754 assert(rscratch != noreg || always_reachable(src), "missing");
2755
2756 if (reachable(src)) {
2757 vaddss(dst, nds, as_Address(src));
2758 } else {
2759 lea(rscratch, src);
2760 vaddss(dst, nds, Address(rscratch, 0));
2761 }
2762 }
2763
2764 void MacroAssembler::vpaddb(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
2765 assert(UseAVX > 0, "requires some form of AVX");
2766 assert(rscratch != noreg || always_reachable(src), "missing");
2767
2768 if (reachable(src)) {
2769 Assembler::vpaddb(dst, nds, as_Address(src), vector_len);
2770 } else {
2771 lea(rscratch, src);
2772 Assembler::vpaddb(dst, nds, Address(rscratch, 0), vector_len);
2773 }
2774 }
2775
2776 void MacroAssembler::vpaddd(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
2777 assert(UseAVX > 0, "requires some form of AVX");
2778 assert(rscratch != noreg || always_reachable(src), "missing");
2779
2780 if (reachable(src)) {
2781 Assembler::vpaddd(dst, nds, as_Address(src), vector_len);
2782 } else {
2783 lea(rscratch, src);
2784 Assembler::vpaddd(dst, nds, Address(rscratch, 0), vector_len);
2785 }
2786 }
2787
2788 void MacroAssembler::vabsss(XMMRegister dst, XMMRegister nds, XMMRegister src, AddressLiteral negate_field, int vector_len, Register rscratch) {
2789 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vldq()),"XMM register should be 0-15");
2790 assert(rscratch != noreg || always_reachable(negate_field), "missing");
2791
2792 vandps(dst, nds, negate_field, vector_len, rscratch);
2793 }
2794
2795 void MacroAssembler::vabssd(XMMRegister dst, XMMRegister nds, XMMRegister src, AddressLiteral negate_field, int vector_len, Register rscratch) {
2796 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vldq()),"XMM register should be 0-15");
2797 assert(rscratch != noreg || always_reachable(negate_field), "missing");
2798
2799 vandpd(dst, nds, negate_field, vector_len, rscratch);
2800 }
2801
2802 void MacroAssembler::vpaddb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
2803 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2804 Assembler::vpaddb(dst, nds, src, vector_len);
2805 }
2806
2807 void MacroAssembler::vpaddb(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
2808 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2809 Assembler::vpaddb(dst, nds, src, vector_len);
2810 }
2811
2812 void MacroAssembler::vpaddw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
2813 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2814 Assembler::vpaddw(dst, nds, src, vector_len);
2815 }
2816
2817 void MacroAssembler::vpaddw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
2818 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2819 Assembler::vpaddw(dst, nds, src, vector_len);
2820 }
2821
2822 void MacroAssembler::vpand(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
2823 assert(rscratch != noreg || always_reachable(src), "missing");
2824
2825 if (reachable(src)) {
2826 Assembler::vpand(dst, nds, as_Address(src), vector_len);
2827 } else {
2828 lea(rscratch, src);
2829 Assembler::vpand(dst, nds, Address(rscratch, 0), vector_len);
2830 }
2831 }
2832
2833 void MacroAssembler::vpbroadcastd(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2834 assert(rscratch != noreg || always_reachable(src), "missing");
2835
2836 if (reachable(src)) {
2837 Assembler::vpbroadcastd(dst, as_Address(src), vector_len);
2838 } else {
2839 lea(rscratch, src);
2840 Assembler::vpbroadcastd(dst, Address(rscratch, 0), vector_len);
2841 }
2842 }
2843
2844 void MacroAssembler::vbroadcasti128(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2845 assert(rscratch != noreg || always_reachable(src), "missing");
2846
2847 if (reachable(src)) {
2848 Assembler::vbroadcasti128(dst, as_Address(src), vector_len);
2849 } else {
2850 lea(rscratch, src);
2851 Assembler::vbroadcasti128(dst, Address(rscratch, 0), vector_len);
2852 }
2853 }
2854
2855 void MacroAssembler::vpbroadcastq(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2856 assert(rscratch != noreg || always_reachable(src), "missing");
2857
2858 if (reachable(src)) {
2859 Assembler::vpbroadcastq(dst, as_Address(src), vector_len);
2860 } else {
2861 lea(rscratch, src);
2862 Assembler::vpbroadcastq(dst, Address(rscratch, 0), vector_len);
2863 }
2864 }
2865
2866 void MacroAssembler::vbroadcastsd(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2867 assert(rscratch != noreg || always_reachable(src), "missing");
2868
2869 if (reachable(src)) {
2870 Assembler::vbroadcastsd(dst, as_Address(src), vector_len);
2871 } else {
2872 lea(rscratch, src);
2873 Assembler::vbroadcastsd(dst, Address(rscratch, 0), vector_len);
2874 }
2875 }
2876
2877 void MacroAssembler::vbroadcastss(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2878 assert(rscratch != noreg || always_reachable(src), "missing");
2879
2880 if (reachable(src)) {
2881 Assembler::vbroadcastss(dst, as_Address(src), vector_len);
2882 } else {
2883 lea(rscratch, src);
2884 Assembler::vbroadcastss(dst, Address(rscratch, 0), vector_len);
2885 }
2886 }
2887
2888 // Vector float blend
2889 // vblendvps(XMMRegister dst, XMMRegister nds, XMMRegister src, XMMRegister mask, int vector_len, bool compute_mask = true, XMMRegister scratch = xnoreg)
2890 void MacroAssembler::vblendvps(XMMRegister dst, XMMRegister src1, XMMRegister src2, XMMRegister mask, int vector_len, bool compute_mask, XMMRegister scratch) {
2891 // WARN: Allow dst == (src1|src2), mask == scratch
2892 bool blend_emulation = EnableX86ECoreOpts && UseAVX > 1 &&
2893 !(VM_Version::is_intel_darkmont() && (dst == src1)); // partially fixed on Darkmont
2894 bool scratch_available = scratch != xnoreg && scratch != src1 && scratch != src2 && scratch != dst;
2895 bool dst_available = dst != mask && (dst != src1 || dst != src2);
2896 if (blend_emulation && scratch_available && dst_available) {
2897 if (compute_mask) {
2898 vpsrad(scratch, mask, 32, vector_len);
2899 mask = scratch;
2900 }
2901 if (dst == src1) {
2902 vpandn(dst, mask, src1, vector_len); // if mask == 0, src1
2903 vpand (scratch, mask, src2, vector_len); // if mask == 1, src2
2904 } else {
2905 vpand (dst, mask, src2, vector_len); // if mask == 1, src2
2906 vpandn(scratch, mask, src1, vector_len); // if mask == 0, src1
2907 }
2908 vpor(dst, dst, scratch, vector_len);
2909 } else {
2910 Assembler::vblendvps(dst, src1, src2, mask, vector_len);
2911 }
2912 }
2913
2914 // vblendvpd(XMMRegister dst, XMMRegister nds, XMMRegister src, XMMRegister mask, int vector_len, bool compute_mask = true, XMMRegister scratch = xnoreg)
2915 void MacroAssembler::vblendvpd(XMMRegister dst, XMMRegister src1, XMMRegister src2, XMMRegister mask, int vector_len, bool compute_mask, XMMRegister scratch) {
2916 // WARN: Allow dst == (src1|src2), mask == scratch
2917 bool blend_emulation = EnableX86ECoreOpts && UseAVX > 1 &&
2918 !(VM_Version::is_intel_darkmont() && (dst == src1)); // partially fixed on Darkmont
2919 bool scratch_available = scratch != xnoreg && scratch != src1 && scratch != src2 && scratch != dst && (!compute_mask || scratch != mask);
2920 bool dst_available = dst != mask && (dst != src1 || dst != src2);
2921 if (blend_emulation && scratch_available && dst_available) {
2922 if (compute_mask) {
2923 vpxor(scratch, scratch, scratch, vector_len);
2924 vpcmpgtq(scratch, scratch, mask, vector_len);
2925 mask = scratch;
2926 }
2927 if (dst == src1) {
2928 vpandn(dst, mask, src1, vector_len); // if mask == 0, src
2929 vpand (scratch, mask, src2, vector_len); // if mask == 1, src2
2930 } else {
2931 vpand (dst, mask, src2, vector_len); // if mask == 1, src2
2932 vpandn(scratch, mask, src1, vector_len); // if mask == 0, src
2933 }
2934 vpor(dst, dst, scratch, vector_len);
2935 } else {
2936 Assembler::vblendvpd(dst, src1, src2, mask, vector_len);
2937 }
2938 }
2939
2940 void MacroAssembler::vpcmpeqb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
2941 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2942 Assembler::vpcmpeqb(dst, nds, src, vector_len);
2943 }
2944
2945 void MacroAssembler::vpcmpeqb(XMMRegister dst, XMMRegister src1, Address src2, int vector_len) {
2946 assert(((dst->encoding() < 16 && src1->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2947 Assembler::vpcmpeqb(dst, src1, src2, vector_len);
2948 }
2949
2950 void MacroAssembler::vpcmpeqw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
2951 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2952 Assembler::vpcmpeqw(dst, nds, src, vector_len);
2953 }
2954
2955 void MacroAssembler::vpcmpeqw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
2956 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2957 Assembler::vpcmpeqw(dst, nds, src, vector_len);
2958 }
2959
2960 void MacroAssembler::evpcmpeqd(KRegister kdst, KRegister mask, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
2961 assert(rscratch != noreg || always_reachable(src), "missing");
2962
2963 if (reachable(src)) {
2964 Assembler::evpcmpeqd(kdst, mask, nds, as_Address(src), vector_len);
2965 } else {
2966 lea(rscratch, src);
2967 Assembler::evpcmpeqd(kdst, mask, nds, Address(rscratch, 0), vector_len);
2968 }
2969 }
2970
2971 void MacroAssembler::evpcmpd(KRegister kdst, KRegister mask, XMMRegister nds, AddressLiteral src,
2972 int comparison, bool is_signed, int vector_len, Register rscratch) {
2973 assert(rscratch != noreg || always_reachable(src), "missing");
2974
2975 if (reachable(src)) {
2976 Assembler::evpcmpd(kdst, mask, nds, as_Address(src), comparison, is_signed, vector_len);
2977 } else {
2978 lea(rscratch, src);
2979 Assembler::evpcmpd(kdst, mask, nds, Address(rscratch, 0), comparison, is_signed, vector_len);
2980 }
2981 }
2982
2983 void MacroAssembler::evpcmpq(KRegister kdst, KRegister mask, XMMRegister nds, AddressLiteral src,
2984 int comparison, bool is_signed, int vector_len, Register rscratch) {
2985 assert(rscratch != noreg || always_reachable(src), "missing");
2986
2987 if (reachable(src)) {
2988 Assembler::evpcmpq(kdst, mask, nds, as_Address(src), comparison, is_signed, vector_len);
2989 } else {
2990 lea(rscratch, src);
2991 Assembler::evpcmpq(kdst, mask, nds, Address(rscratch, 0), comparison, is_signed, vector_len);
2992 }
2993 }
2994
2995 void MacroAssembler::evpcmpb(KRegister kdst, KRegister mask, XMMRegister nds, AddressLiteral src,
2996 int comparison, bool is_signed, int vector_len, Register rscratch) {
2997 assert(rscratch != noreg || always_reachable(src), "missing");
2998
2999 if (reachable(src)) {
3000 Assembler::evpcmpb(kdst, mask, nds, as_Address(src), comparison, is_signed, vector_len);
3001 } else {
3002 lea(rscratch, src);
3003 Assembler::evpcmpb(kdst, mask, nds, Address(rscratch, 0), comparison, is_signed, vector_len);
3004 }
3005 }
3006
3007 void MacroAssembler::evpcmpw(KRegister kdst, KRegister mask, XMMRegister nds, AddressLiteral src,
3008 int comparison, bool is_signed, int vector_len, Register rscratch) {
3009 assert(rscratch != noreg || always_reachable(src), "missing");
3010
3011 if (reachable(src)) {
3012 Assembler::evpcmpw(kdst, mask, nds, as_Address(src), comparison, is_signed, vector_len);
3013 } else {
3014 lea(rscratch, src);
3015 Assembler::evpcmpw(kdst, mask, nds, Address(rscratch, 0), comparison, is_signed, vector_len);
3016 }
3017 }
3018
3019 void MacroAssembler::vpcmpCC(XMMRegister dst, XMMRegister nds, XMMRegister src, int cond_encoding, Width width, int vector_len) {
3020 if (width == Assembler::Q) {
3021 Assembler::vpcmpCCq(dst, nds, src, cond_encoding, vector_len);
3022 } else {
3023 Assembler::vpcmpCCbwd(dst, nds, src, cond_encoding, vector_len);
3024 }
3025 }
3026
3027 void MacroAssembler::vpcmpCCW(XMMRegister dst, XMMRegister nds, XMMRegister src, XMMRegister xtmp, ComparisonPredicate cond, Width width, int vector_len) {
3028 int eq_cond_enc = 0x29;
3029 int gt_cond_enc = 0x37;
3030 if (width != Assembler::Q) {
3031 eq_cond_enc = 0x74 + width;
3032 gt_cond_enc = 0x64 + width;
3033 }
3034 switch (cond) {
3035 case eq:
3036 vpcmpCC(dst, nds, src, eq_cond_enc, width, vector_len);
3037 break;
3038 case neq:
3039 vpcmpCC(dst, nds, src, eq_cond_enc, width, vector_len);
3040 vallones(xtmp, vector_len);
3041 vpxor(dst, xtmp, dst, vector_len);
3042 break;
3043 case le:
3044 vpcmpCC(dst, nds, src, gt_cond_enc, width, vector_len);
3045 vallones(xtmp, vector_len);
3046 vpxor(dst, xtmp, dst, vector_len);
3047 break;
3048 case nlt:
3049 vpcmpCC(dst, src, nds, gt_cond_enc, width, vector_len);
3050 vallones(xtmp, vector_len);
3051 vpxor(dst, xtmp, dst, vector_len);
3052 break;
3053 case lt:
3054 vpcmpCC(dst, src, nds, gt_cond_enc, width, vector_len);
3055 break;
3056 case nle:
3057 vpcmpCC(dst, nds, src, gt_cond_enc, width, vector_len);
3058 break;
3059 default:
3060 assert(false, "Should not reach here");
3061 }
3062 }
3063
3064 void MacroAssembler::vpmovzxbw(XMMRegister dst, Address src, int vector_len) {
3065 assert(((dst->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3066 Assembler::vpmovzxbw(dst, src, vector_len);
3067 }
3068
3069 void MacroAssembler::vpmovmskb(Register dst, XMMRegister src, int vector_len) {
3070 assert((src->encoding() < 16),"XMM register should be 0-15");
3071 Assembler::vpmovmskb(dst, src, vector_len);
3072 }
3073
3074 void MacroAssembler::vpmullw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
3075 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3076 Assembler::vpmullw(dst, nds, src, vector_len);
3077 }
3078
3079 void MacroAssembler::vpmullw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
3080 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3081 Assembler::vpmullw(dst, nds, src, vector_len);
3082 }
3083
3084 void MacroAssembler::vpmulld(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3085 assert((UseAVX > 0), "AVX support is needed");
3086 assert(rscratch != noreg || always_reachable(src), "missing");
3087
3088 if (reachable(src)) {
3089 Assembler::vpmulld(dst, nds, as_Address(src), vector_len);
3090 } else {
3091 lea(rscratch, src);
3092 Assembler::vpmulld(dst, nds, Address(rscratch, 0), vector_len);
3093 }
3094 }
3095
3096 void MacroAssembler::vpsubb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
3097 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3098 Assembler::vpsubb(dst, nds, src, vector_len);
3099 }
3100
3101 void MacroAssembler::vpsubb(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
3102 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3103 Assembler::vpsubb(dst, nds, src, vector_len);
3104 }
3105
3106 void MacroAssembler::vpsubw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
3107 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3108 Assembler::vpsubw(dst, nds, src, vector_len);
3109 }
3110
3111 void MacroAssembler::vpsubw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
3112 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3113 Assembler::vpsubw(dst, nds, src, vector_len);
3114 }
3115
3116 void MacroAssembler::vpsraw(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) {
3117 assert(((dst->encoding() < 16 && shift->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3118 Assembler::vpsraw(dst, nds, shift, vector_len);
3119 }
3120
3121 void MacroAssembler::vpsraw(XMMRegister dst, XMMRegister nds, int shift, int vector_len) {
3122 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3123 Assembler::vpsraw(dst, nds, shift, vector_len);
3124 }
3125
3126 void MacroAssembler::evpsraq(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) {
3127 assert(UseAVX > 2,"");
3128 if (!VM_Version::supports_avx512vl() && vector_len < 2) {
3129 vector_len = 2;
3130 }
3131 Assembler::evpsraq(dst, nds, shift, vector_len);
3132 }
3133
3134 void MacroAssembler::evpsraq(XMMRegister dst, XMMRegister nds, int shift, int vector_len) {
3135 assert(UseAVX > 2,"");
3136 if (!VM_Version::supports_avx512vl() && vector_len < 2) {
3137 vector_len = 2;
3138 }
3139 Assembler::evpsraq(dst, nds, shift, vector_len);
3140 }
3141
3142 void MacroAssembler::vpsrlw(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) {
3143 assert(((dst->encoding() < 16 && shift->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3144 Assembler::vpsrlw(dst, nds, shift, vector_len);
3145 }
3146
3147 void MacroAssembler::vpsrlw(XMMRegister dst, XMMRegister nds, int shift, int vector_len) {
3148 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3149 Assembler::vpsrlw(dst, nds, shift, vector_len);
3150 }
3151
3152 void MacroAssembler::vpsllw(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) {
3153 assert(((dst->encoding() < 16 && shift->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3154 Assembler::vpsllw(dst, nds, shift, vector_len);
3155 }
3156
3157 void MacroAssembler::vpsllw(XMMRegister dst, XMMRegister nds, int shift, int vector_len) {
3158 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3159 Assembler::vpsllw(dst, nds, shift, vector_len);
3160 }
3161
3162 void MacroAssembler::vptest(XMMRegister dst, XMMRegister src) {
3163 assert((dst->encoding() < 16 && src->encoding() < 16),"XMM register should be 0-15");
3164 Assembler::vptest(dst, src);
3165 }
3166
3167 void MacroAssembler::punpcklbw(XMMRegister dst, XMMRegister src) {
3168 assert(((dst->encoding() < 16 && src->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3169 Assembler::punpcklbw(dst, src);
3170 }
3171
3172 void MacroAssembler::pshufd(XMMRegister dst, Address src, int mode) {
3173 assert(((dst->encoding() < 16) || VM_Version::supports_avx512vl()),"XMM register should be 0-15");
3174 Assembler::pshufd(dst, src, mode);
3175 }
3176
3177 void MacroAssembler::pshuflw(XMMRegister dst, XMMRegister src, int mode) {
3178 assert(((dst->encoding() < 16 && src->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3179 Assembler::pshuflw(dst, src, mode);
3180 }
3181
3182 void MacroAssembler::vandpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3183 assert(rscratch != noreg || always_reachable(src), "missing");
3184
3185 if (reachable(src)) {
3186 vandpd(dst, nds, as_Address(src), vector_len);
3187 } else {
3188 lea(rscratch, src);
3189 vandpd(dst, nds, Address(rscratch, 0), vector_len);
3190 }
3191 }
3192
3193 void MacroAssembler::vandps(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3194 assert(rscratch != noreg || always_reachable(src), "missing");
3195
3196 if (reachable(src)) {
3197 vandps(dst, nds, as_Address(src), vector_len);
3198 } else {
3199 lea(rscratch, src);
3200 vandps(dst, nds, Address(rscratch, 0), vector_len);
3201 }
3202 }
3203
3204 void MacroAssembler::evpord(XMMRegister dst, KRegister mask, XMMRegister nds, AddressLiteral src,
3205 bool merge, int vector_len, Register rscratch) {
3206 assert(rscratch != noreg || always_reachable(src), "missing");
3207
3208 if (reachable(src)) {
3209 Assembler::evpord(dst, mask, nds, as_Address(src), merge, vector_len);
3210 } else {
3211 lea(rscratch, src);
3212 Assembler::evpord(dst, mask, nds, Address(rscratch, 0), merge, vector_len);
3213 }
3214 }
3215
3216 void MacroAssembler::vdivsd(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3217 assert(rscratch != noreg || always_reachable(src), "missing");
3218
3219 if (reachable(src)) {
3220 vdivsd(dst, nds, as_Address(src));
3221 } else {
3222 lea(rscratch, src);
3223 vdivsd(dst, nds, Address(rscratch, 0));
3224 }
3225 }
3226
3227 void MacroAssembler::vdivss(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3228 assert(rscratch != noreg || always_reachable(src), "missing");
3229
3230 if (reachable(src)) {
3231 vdivss(dst, nds, as_Address(src));
3232 } else {
3233 lea(rscratch, src);
3234 vdivss(dst, nds, Address(rscratch, 0));
3235 }
3236 }
3237
3238 void MacroAssembler::vmulsd(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3239 assert(rscratch != noreg || always_reachable(src), "missing");
3240
3241 if (reachable(src)) {
3242 vmulsd(dst, nds, as_Address(src));
3243 } else {
3244 lea(rscratch, src);
3245 vmulsd(dst, nds, Address(rscratch, 0));
3246 }
3247 }
3248
3249 void MacroAssembler::vmulss(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3250 assert(rscratch != noreg || always_reachable(src), "missing");
3251
3252 if (reachable(src)) {
3253 vmulss(dst, nds, as_Address(src));
3254 } else {
3255 lea(rscratch, src);
3256 vmulss(dst, nds, Address(rscratch, 0));
3257 }
3258 }
3259
3260 void MacroAssembler::vsubsd(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3261 assert(rscratch != noreg || always_reachable(src), "missing");
3262
3263 if (reachable(src)) {
3264 vsubsd(dst, nds, as_Address(src));
3265 } else {
3266 lea(rscratch, src);
3267 vsubsd(dst, nds, Address(rscratch, 0));
3268 }
3269 }
3270
3271 void MacroAssembler::vsubss(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3272 assert(rscratch != noreg || always_reachable(src), "missing");
3273
3274 if (reachable(src)) {
3275 vsubss(dst, nds, as_Address(src));
3276 } else {
3277 lea(rscratch, src);
3278 vsubss(dst, nds, Address(rscratch, 0));
3279 }
3280 }
3281
3282 void MacroAssembler::vnegatess(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3283 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vldq()),"XMM register should be 0-15");
3284 assert(rscratch != noreg || always_reachable(src), "missing");
3285
3286 vxorps(dst, nds, src, Assembler::AVX_128bit, rscratch);
3287 }
3288
3289 void MacroAssembler::vnegatesd(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3290 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vldq()),"XMM register should be 0-15");
3291 assert(rscratch != noreg || always_reachable(src), "missing");
3292
3293 vxorpd(dst, nds, src, Assembler::AVX_128bit, rscratch);
3294 }
3295
3296 void MacroAssembler::vxorpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3297 assert(rscratch != noreg || always_reachable(src), "missing");
3298
3299 if (reachable(src)) {
3300 vxorpd(dst, nds, as_Address(src), vector_len);
3301 } else {
3302 lea(rscratch, src);
3303 vxorpd(dst, nds, Address(rscratch, 0), vector_len);
3304 }
3305 }
3306
3307 void MacroAssembler::vxorps(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3308 assert(rscratch != noreg || always_reachable(src), "missing");
3309
3310 if (reachable(src)) {
3311 vxorps(dst, nds, as_Address(src), vector_len);
3312 } else {
3313 lea(rscratch, src);
3314 vxorps(dst, nds, Address(rscratch, 0), vector_len);
3315 }
3316 }
3317
3318 void MacroAssembler::vpxor(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3319 assert(rscratch != noreg || always_reachable(src), "missing");
3320
3321 if (UseAVX > 1 || (vector_len < 1)) {
3322 if (reachable(src)) {
3323 Assembler::vpxor(dst, nds, as_Address(src), vector_len);
3324 } else {
3325 lea(rscratch, src);
3326 Assembler::vpxor(dst, nds, Address(rscratch, 0), vector_len);
3327 }
3328 } else {
3329 MacroAssembler::vxorpd(dst, nds, src, vector_len, rscratch);
3330 }
3331 }
3332
3333 void MacroAssembler::vpermd(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3334 assert(rscratch != noreg || always_reachable(src), "missing");
3335
3336 if (reachable(src)) {
3337 Assembler::vpermd(dst, nds, as_Address(src), vector_len);
3338 } else {
3339 lea(rscratch, src);
3340 Assembler::vpermd(dst, nds, Address(rscratch, 0), vector_len);
3341 }
3342 }
3343
3344 void MacroAssembler::clear_jobject_tag(Register possibly_non_local) {
3345 const int32_t inverted_mask = ~static_cast<int32_t>(JNIHandles::tag_mask);
3346 STATIC_ASSERT(inverted_mask == -4); // otherwise check this code
3347 // The inverted mask is sign-extended
3348 andptr(possibly_non_local, inverted_mask);
3349 }
3350
3351 void MacroAssembler::resolve_jobject(Register value,
3352 Register tmp) {
3353 Register thread = r15_thread;
3354 assert_different_registers(value, thread, tmp);
3355 Label done, tagged, weak_tagged;
3356 testptr(value, value);
3357 jcc(Assembler::zero, done); // Use null as-is.
3358 testptr(value, JNIHandles::tag_mask); // Test for tag.
3359 jcc(Assembler::notZero, tagged);
3360
3361 // Resolve local handle
3362 access_load_at(T_OBJECT, IN_NATIVE | AS_RAW, value, Address(value, 0), tmp);
3363 verify_oop(value);
3364 jmp(done);
3365
3366 bind(tagged);
3367 testptr(value, JNIHandles::TypeTag::weak_global); // Test for weak tag.
3368 jcc(Assembler::notZero, weak_tagged);
3369
3370 // Resolve global handle
3371 access_load_at(T_OBJECT, IN_NATIVE, value, Address(value, -JNIHandles::TypeTag::global), tmp);
3372 verify_oop(value);
3373 jmp(done);
3374
3375 bind(weak_tagged);
3376 // Resolve jweak.
3377 access_load_at(T_OBJECT, IN_NATIVE | ON_PHANTOM_OOP_REF,
3378 value, Address(value, -JNIHandles::TypeTag::weak_global), tmp);
3379 verify_oop(value);
3380
3381 bind(done);
3382 }
3383
3384 void MacroAssembler::resolve_global_jobject(Register value,
3385 Register tmp) {
3386 Register thread = r15_thread;
3387 assert_different_registers(value, thread, tmp);
3388 Label done;
3389
3390 testptr(value, value);
3391 jcc(Assembler::zero, done); // Use null as-is.
3392
3393 #ifdef ASSERT
3394 {
3395 Label valid_global_tag;
3396 testptr(value, JNIHandles::TypeTag::global); // Test for global tag.
3397 jcc(Assembler::notZero, valid_global_tag);
3398 stop("non global jobject using resolve_global_jobject");
3399 bind(valid_global_tag);
3400 }
3401 #endif
3402
3403 // Resolve global handle
3404 access_load_at(T_OBJECT, IN_NATIVE, value, Address(value, -JNIHandles::TypeTag::global), tmp);
3405 verify_oop(value);
3406
3407 bind(done);
3408 }
3409
3410 void MacroAssembler::subptr(Register dst, int32_t imm32) {
3411 subq(dst, imm32);
3412 }
3413
3414 // Force generation of a 4 byte immediate value even if it fits into 8bit
3415 void MacroAssembler::subptr_imm32(Register dst, int32_t imm32) {
3416 subq_imm32(dst, imm32);
3417 }
3418
3419 void MacroAssembler::subptr(Register dst, Register src) {
3420 subq(dst, src);
3421 }
3422
3423 // C++ bool manipulation
3424 void MacroAssembler::testbool(Register dst) {
3425 if(sizeof(bool) == 1)
3426 testb(dst, 0xff);
3427 else if(sizeof(bool) == 2) {
3428 // testw implementation needed for two byte bools
3429 ShouldNotReachHere();
3430 } else if(sizeof(bool) == 4)
3431 testl(dst, dst);
3432 else
3433 // unsupported
3434 ShouldNotReachHere();
3435 }
3436
3437 void MacroAssembler::testptr(Register dst, Register src) {
3438 testq(dst, src);
3439 }
3440
3441 // Defines obj, preserves var_size_in_bytes, okay for t2 == var_size_in_bytes.
3442 void MacroAssembler::tlab_allocate(Register obj,
3443 Register var_size_in_bytes,
3444 int con_size_in_bytes,
3445 Register t1,
3446 Register t2,
3447 Label& slow_case) {
3448 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
3449 bs->tlab_allocate(this, obj, var_size_in_bytes, con_size_in_bytes, t1, t2, slow_case);
3450 }
3451
3452 RegSet MacroAssembler::call_clobbered_gp_registers() {
3453 RegSet regs;
3454 regs += RegSet::of(rax, rcx, rdx);
3455 #ifndef _WINDOWS
3456 regs += RegSet::of(rsi, rdi);
3457 #endif
3458 regs += RegSet::range(r8, r11);
3459 if (UseAPX) {
3460 regs += RegSet::range(r16, as_Register(Register::number_of_registers - 1));
3461 }
3462 return regs;
3463 }
3464
3465 XMMRegSet MacroAssembler::call_clobbered_xmm_registers() {
3466 int num_xmm_registers = XMMRegister::available_xmm_registers();
3467 #if defined(_WINDOWS)
3468 XMMRegSet result = XMMRegSet::range(xmm0, xmm5);
3469 if (num_xmm_registers > 16) {
3470 result += XMMRegSet::range(xmm16, as_XMMRegister(num_xmm_registers - 1));
3471 }
3472 return result;
3473 #else
3474 return XMMRegSet::range(xmm0, as_XMMRegister(num_xmm_registers - 1));
3475 #endif
3476 }
3477
3478 // C1 only ever uses the first double/float of the XMM register.
3479 static int xmm_save_size() { return sizeof(double); }
3480
3481 static void save_xmm_register(MacroAssembler* masm, int offset, XMMRegister reg) {
3482 masm->movdbl(Address(rsp, offset), reg);
3483 }
3484
3485 static void restore_xmm_register(MacroAssembler* masm, int offset, XMMRegister reg) {
3486 masm->movdbl(reg, Address(rsp, offset));
3487 }
3488
3489 static int register_section_sizes(RegSet gp_registers, XMMRegSet xmm_registers,
3490 bool save_fpu, int& gp_area_size, int& xmm_area_size) {
3491
3492 gp_area_size = align_up(gp_registers.size() * Register::max_slots_per_register * VMRegImpl::stack_slot_size,
3493 StackAlignmentInBytes);
3494 xmm_area_size = save_fpu ? xmm_registers.size() * xmm_save_size() : 0;
3495
3496 return gp_area_size + xmm_area_size;
3497 }
3498
3499 void MacroAssembler::push_call_clobbered_registers_except(RegSet exclude, bool save_fpu) {
3500 block_comment("push_call_clobbered_registers start");
3501 // Regular registers
3502 RegSet gp_registers_to_push = call_clobbered_gp_registers() - exclude;
3503
3504 int gp_area_size;
3505 int xmm_area_size;
3506 int total_save_size = register_section_sizes(gp_registers_to_push, call_clobbered_xmm_registers(), save_fpu,
3507 gp_area_size, xmm_area_size);
3508 subptr(rsp, total_save_size);
3509
3510 push_set(gp_registers_to_push, 0);
3511
3512 if (save_fpu) {
3513 push_set(call_clobbered_xmm_registers(), gp_area_size);
3514 }
3515
3516 block_comment("push_call_clobbered_registers end");
3517 }
3518
3519 void MacroAssembler::pop_call_clobbered_registers_except(RegSet exclude, bool restore_fpu) {
3520 block_comment("pop_call_clobbered_registers start");
3521
3522 RegSet gp_registers_to_pop = call_clobbered_gp_registers() - exclude;
3523
3524 int gp_area_size;
3525 int xmm_area_size;
3526 int total_save_size = register_section_sizes(gp_registers_to_pop, call_clobbered_xmm_registers(), restore_fpu,
3527 gp_area_size, xmm_area_size);
3528
3529 if (restore_fpu) {
3530 pop_set(call_clobbered_xmm_registers(), gp_area_size);
3531 }
3532
3533 pop_set(gp_registers_to_pop, 0);
3534
3535 addptr(rsp, total_save_size);
3536
3537 vzeroupper();
3538
3539 block_comment("pop_call_clobbered_registers end");
3540 }
3541
3542 void MacroAssembler::push_set(XMMRegSet set, int offset) {
3543 assert(is_aligned(set.size() * xmm_save_size(), StackAlignmentInBytes), "must be");
3544 int spill_offset = offset;
3545
3546 for (RegSetIterator<XMMRegister> it = set.begin(); *it != xnoreg; ++it) {
3547 save_xmm_register(this, spill_offset, *it);
3548 spill_offset += xmm_save_size();
3549 }
3550 }
3551
3552 void MacroAssembler::pop_set(XMMRegSet set, int offset) {
3553 int restore_size = set.size() * xmm_save_size();
3554 assert(is_aligned(restore_size, StackAlignmentInBytes), "must be");
3555
3556 int restore_offset = offset + restore_size - xmm_save_size();
3557
3558 for (ReverseRegSetIterator<XMMRegister> it = set.rbegin(); *it != xnoreg; ++it) {
3559 restore_xmm_register(this, restore_offset, *it);
3560 restore_offset -= xmm_save_size();
3561 }
3562 }
3563
3564 void MacroAssembler::push_set(RegSet set, int offset) {
3565 int spill_offset;
3566 if (offset == -1) {
3567 int register_push_size = set.size() * Register::max_slots_per_register * VMRegImpl::stack_slot_size;
3568 int aligned_size = align_up(register_push_size, StackAlignmentInBytes);
3569 subptr(rsp, aligned_size);
3570 spill_offset = 0;
3571 } else {
3572 spill_offset = offset;
3573 }
3574
3575 for (RegSetIterator<Register> it = set.begin(); *it != noreg; ++it) {
3576 movptr(Address(rsp, spill_offset), *it);
3577 spill_offset += Register::max_slots_per_register * VMRegImpl::stack_slot_size;
3578 }
3579 }
3580
3581 void MacroAssembler::pop_set(RegSet set, int offset) {
3582
3583 int gp_reg_size = Register::max_slots_per_register * VMRegImpl::stack_slot_size;
3584 int restore_size = set.size() * gp_reg_size;
3585 int aligned_size = align_up(restore_size, StackAlignmentInBytes);
3586
3587 int restore_offset;
3588 if (offset == -1) {
3589 restore_offset = restore_size - gp_reg_size;
3590 } else {
3591 restore_offset = offset + restore_size - gp_reg_size;
3592 }
3593 for (ReverseRegSetIterator<Register> it = set.rbegin(); *it != noreg; ++it) {
3594 movptr(*it, Address(rsp, restore_offset));
3595 restore_offset -= gp_reg_size;
3596 }
3597
3598 if (offset == -1) {
3599 addptr(rsp, aligned_size);
3600 }
3601 }
3602
3603 // Preserves the contents of address, destroys the contents length_in_bytes and temp.
3604 void MacroAssembler::zero_memory(Register address, Register length_in_bytes, int offset_in_bytes, Register temp) {
3605 assert(address != length_in_bytes && address != temp && temp != length_in_bytes, "registers must be different");
3606 assert((offset_in_bytes & (BytesPerWord - 1)) == 0, "offset must be a multiple of BytesPerWord");
3607 Label done;
3608
3609 testptr(length_in_bytes, length_in_bytes);
3610 jcc(Assembler::zero, done);
3611
3612 // initialize topmost word, divide index by 2, check if odd and test if zero
3613 // note: for the remaining code to work, index must be a multiple of BytesPerWord
3614 #ifdef ASSERT
3615 {
3616 Label L;
3617 testptr(length_in_bytes, BytesPerWord - 1);
3618 jcc(Assembler::zero, L);
3619 stop("length must be a multiple of BytesPerWord");
3620 bind(L);
3621 }
3622 #endif
3623 Register index = length_in_bytes;
3624 xorptr(temp, temp); // use _zero reg to clear memory (shorter code)
3625 if (UseIncDec) {
3626 shrptr(index, 3); // divide by 8/16 and set carry flag if bit 2 was set
3627 } else {
3628 shrptr(index, 2); // use 2 instructions to avoid partial flag stall
3629 shrptr(index, 1);
3630 }
3631
3632 // initialize remaining object fields: index is a multiple of 2 now
3633 {
3634 Label loop;
3635 bind(loop);
3636 movptr(Address(address, index, Address::times_8, offset_in_bytes - 1*BytesPerWord), temp);
3637 decrement(index);
3638 jcc(Assembler::notZero, loop);
3639 }
3640
3641 bind(done);
3642 }
3643
3644 // Look up the method for a megamorphic invokeinterface call.
3645 // The target method is determined by <intf_klass, itable_index>.
3646 // The receiver klass is in recv_klass.
3647 // On success, the result will be in method_result, and execution falls through.
3648 // On failure, execution transfers to the given label.
3649 void MacroAssembler::lookup_interface_method(Register recv_klass,
3650 Register intf_klass,
3651 RegisterOrConstant itable_index,
3652 Register method_result,
3653 Register scan_temp,
3654 Label& L_no_such_interface,
3655 bool return_method) {
3656 assert_different_registers(recv_klass, intf_klass, scan_temp);
3657 assert_different_registers(method_result, intf_klass, scan_temp);
3658 assert(recv_klass != method_result || !return_method,
3659 "recv_klass can be destroyed when method isn't needed");
3660
3661 assert(itable_index.is_constant() || itable_index.as_register() == method_result,
3662 "caller must use same register for non-constant itable index as for method");
3663
3664 // Compute start of first itableOffsetEntry (which is at the end of the vtable)
3665 int vtable_base = in_bytes(Klass::vtable_start_offset());
3666 int itentry_off = in_bytes(itableMethodEntry::method_offset());
3667 int scan_step = itableOffsetEntry::size() * wordSize;
3668 int vte_size = vtableEntry::size_in_bytes();
3669 Address::ScaleFactor times_vte_scale = Address::times_ptr;
3670 assert(vte_size == wordSize, "else adjust times_vte_scale");
3671
3672 movl(scan_temp, Address(recv_klass, Klass::vtable_length_offset()));
3673
3674 // Could store the aligned, prescaled offset in the klass.
3675 lea(scan_temp, Address(recv_klass, scan_temp, times_vte_scale, vtable_base));
3676
3677 if (return_method) {
3678 // Adjust recv_klass by scaled itable_index, so we can free itable_index.
3679 assert(itableMethodEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
3680 lea(recv_klass, Address(recv_klass, itable_index, Address::times_ptr, itentry_off));
3681 }
3682
3683 // for (scan = klass->itable(); scan->interface() != nullptr; scan += scan_step) {
3684 // if (scan->interface() == intf) {
3685 // result = (klass + scan->offset() + itable_index);
3686 // }
3687 // }
3688 Label search, found_method;
3689
3690 for (int peel = 1; peel >= 0; peel--) {
3691 movptr(method_result, Address(scan_temp, itableOffsetEntry::interface_offset()));
3692 cmpptr(intf_klass, method_result);
3693
3694 if (peel) {
3695 jccb(Assembler::equal, found_method);
3696 } else {
3697 jccb(Assembler::notEqual, search);
3698 // (invert the test to fall through to found_method...)
3699 }
3700
3701 if (!peel) break;
3702
3703 bind(search);
3704
3705 // Check that the previous entry is non-null. A null entry means that
3706 // the receiver class doesn't implement the interface, and wasn't the
3707 // same as when the caller was compiled.
3708 testptr(method_result, method_result);
3709 jcc(Assembler::zero, L_no_such_interface);
3710 addptr(scan_temp, scan_step);
3711 }
3712
3713 bind(found_method);
3714
3715 if (return_method) {
3716 // Got a hit.
3717 movl(scan_temp, Address(scan_temp, itableOffsetEntry::offset_offset()));
3718 movptr(method_result, Address(recv_klass, scan_temp, Address::times_1));
3719 }
3720 }
3721
3722 // Look up the method for a megamorphic invokeinterface call in a single pass over itable:
3723 // - check recv_klass (actual object class) is a subtype of resolved_klass from CompiledICData
3724 // - find a holder_klass (class that implements the method) vtable offset and get the method from vtable by index
3725 // The target method is determined by <holder_klass, itable_index>.
3726 // The receiver klass is in recv_klass.
3727 // On success, the result will be in method_result, and execution falls through.
3728 // On failure, execution transfers to the given label.
3729 void MacroAssembler::lookup_interface_method_stub(Register recv_klass,
3730 Register holder_klass,
3731 Register resolved_klass,
3732 Register method_result,
3733 Register scan_temp,
3734 Register temp_reg2,
3735 Register receiver,
3736 int itable_index,
3737 Label& L_no_such_interface) {
3738 assert_different_registers(recv_klass, method_result, holder_klass, resolved_klass, scan_temp, temp_reg2, receiver);
3739 Register temp_itbl_klass = method_result;
3740 Register temp_reg = (temp_reg2 == noreg ? recv_klass : temp_reg2); // reuse recv_klass register on 32-bit x86 impl
3741
3742 int vtable_base = in_bytes(Klass::vtable_start_offset());
3743 int itentry_off = in_bytes(itableMethodEntry::method_offset());
3744 int scan_step = itableOffsetEntry::size() * wordSize;
3745 int vte_size = vtableEntry::size_in_bytes();
3746 int ioffset = in_bytes(itableOffsetEntry::interface_offset());
3747 int ooffset = in_bytes(itableOffsetEntry::offset_offset());
3748 Address::ScaleFactor times_vte_scale = Address::times_ptr;
3749 assert(vte_size == wordSize, "adjust times_vte_scale");
3750
3751 Label L_loop_scan_resolved_entry, L_resolved_found, L_holder_found;
3752
3753 // temp_itbl_klass = recv_klass.itable[0]
3754 // scan_temp = &recv_klass.itable[0] + step
3755 movl(scan_temp, Address(recv_klass, Klass::vtable_length_offset()));
3756 movptr(temp_itbl_klass, Address(recv_klass, scan_temp, times_vte_scale, vtable_base + ioffset));
3757 lea(scan_temp, Address(recv_klass, scan_temp, times_vte_scale, vtable_base + ioffset + scan_step));
3758 xorptr(temp_reg, temp_reg);
3759
3760 // Initial checks:
3761 // - if (holder_klass != resolved_klass), go to "scan for resolved"
3762 // - if (itable[0] == 0), no such interface
3763 // - if (itable[0] == holder_klass), shortcut to "holder found"
3764 cmpptr(holder_klass, resolved_klass);
3765 jccb(Assembler::notEqual, L_loop_scan_resolved_entry);
3766 testptr(temp_itbl_klass, temp_itbl_klass);
3767 jccb(Assembler::zero, L_no_such_interface);
3768 cmpptr(holder_klass, temp_itbl_klass);
3769 jccb(Assembler::equal, L_holder_found);
3770
3771 // Loop: Look for holder_klass record in itable
3772 // do {
3773 // tmp = itable[index];
3774 // index += step;
3775 // if (tmp == holder_klass) {
3776 // goto L_holder_found; // Found!
3777 // }
3778 // } while (tmp != 0);
3779 // goto L_no_such_interface // Not found.
3780 Label L_scan_holder;
3781 bind(L_scan_holder);
3782 movptr(temp_itbl_klass, Address(scan_temp, 0));
3783 addptr(scan_temp, scan_step);
3784 cmpptr(holder_klass, temp_itbl_klass);
3785 jccb(Assembler::equal, L_holder_found);
3786 testptr(temp_itbl_klass, temp_itbl_klass);
3787 jccb(Assembler::notZero, L_scan_holder);
3788
3789 jmpb(L_no_such_interface);
3790
3791 // Loop: Look for resolved_class record in itable
3792 // do {
3793 // tmp = itable[index];
3794 // index += step;
3795 // if (tmp == holder_klass) {
3796 // // Also check if we have met a holder klass
3797 // holder_tmp = itable[index-step-ioffset];
3798 // }
3799 // if (tmp == resolved_klass) {
3800 // goto L_resolved_found; // Found!
3801 // }
3802 // } while (tmp != 0);
3803 // goto L_no_such_interface // Not found.
3804 //
3805 Label L_loop_scan_resolved;
3806 bind(L_loop_scan_resolved);
3807 movptr(temp_itbl_klass, Address(scan_temp, 0));
3808 addptr(scan_temp, scan_step);
3809 bind(L_loop_scan_resolved_entry);
3810 cmpptr(holder_klass, temp_itbl_klass);
3811 cmovl(Assembler::equal, temp_reg, Address(scan_temp, ooffset - ioffset - scan_step));
3812 cmpptr(resolved_klass, temp_itbl_klass);
3813 jccb(Assembler::equal, L_resolved_found);
3814 testptr(temp_itbl_klass, temp_itbl_klass);
3815 jccb(Assembler::notZero, L_loop_scan_resolved);
3816
3817 jmpb(L_no_such_interface);
3818
3819 Label L_ready;
3820
3821 // See if we already have a holder klass. If not, go and scan for it.
3822 bind(L_resolved_found);
3823 testptr(temp_reg, temp_reg);
3824 jccb(Assembler::zero, L_scan_holder);
3825 jmpb(L_ready);
3826
3827 bind(L_holder_found);
3828 movl(temp_reg, Address(scan_temp, ooffset - ioffset - scan_step));
3829
3830 // Finally, temp_reg contains holder_klass vtable offset
3831 bind(L_ready);
3832 assert(itableMethodEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
3833 if (temp_reg2 == noreg) { // recv_klass register is clobbered for 32-bit x86 impl
3834 load_klass(scan_temp, receiver, noreg);
3835 movptr(method_result, Address(scan_temp, temp_reg, Address::times_1, itable_index * wordSize + itentry_off));
3836 } else {
3837 movptr(method_result, Address(recv_klass, temp_reg, Address::times_1, itable_index * wordSize + itentry_off));
3838 }
3839 }
3840
3841
3842 // virtual method calling
3843 void MacroAssembler::lookup_virtual_method(Register recv_klass,
3844 RegisterOrConstant vtable_index,
3845 Register method_result) {
3846 const ByteSize base = Klass::vtable_start_offset();
3847 assert(vtableEntry::size() * wordSize == wordSize, "else adjust the scaling in the code below");
3848 Address vtable_entry_addr(recv_klass,
3849 vtable_index, Address::times_ptr,
3850 base + vtableEntry::method_offset());
3851 movptr(method_result, vtable_entry_addr);
3852 }
3853
3854
3855 void MacroAssembler::check_klass_subtype(Register sub_klass,
3856 Register super_klass,
3857 Register temp_reg,
3858 Label& L_success) {
3859 Label L_failure;
3860 check_klass_subtype_fast_path(sub_klass, super_klass, temp_reg, &L_success, &L_failure, nullptr);
3861 check_klass_subtype_slow_path(sub_klass, super_klass, temp_reg, noreg, &L_success, nullptr);
3862 bind(L_failure);
3863 }
3864
3865
3866 void MacroAssembler::check_klass_subtype_fast_path(Register sub_klass,
3867 Register super_klass,
3868 Register temp_reg,
3869 Label* L_success,
3870 Label* L_failure,
3871 Label* L_slow_path,
3872 RegisterOrConstant super_check_offset) {
3873 assert_different_registers(sub_klass, super_klass, temp_reg);
3874 bool must_load_sco = (super_check_offset.constant_or_zero() == -1);
3875 if (super_check_offset.is_register()) {
3876 assert_different_registers(sub_klass, super_klass,
3877 super_check_offset.as_register());
3878 } else if (must_load_sco) {
3879 assert(temp_reg != noreg, "supply either a temp or a register offset");
3880 }
3881
3882 Label L_fallthrough;
3883 int label_nulls = 0;
3884 if (L_success == nullptr) { L_success = &L_fallthrough; label_nulls++; }
3885 if (L_failure == nullptr) { L_failure = &L_fallthrough; label_nulls++; }
3886 if (L_slow_path == nullptr) { L_slow_path = &L_fallthrough; label_nulls++; }
3887 assert(label_nulls <= 1, "at most one null in the batch");
3888
3889 int sc_offset = in_bytes(Klass::secondary_super_cache_offset());
3890 int sco_offset = in_bytes(Klass::super_check_offset_offset());
3891 Address super_check_offset_addr(super_klass, sco_offset);
3892
3893 // Hacked jcc, which "knows" that L_fallthrough, at least, is in
3894 // range of a jccb. If this routine grows larger, reconsider at
3895 // least some of these.
3896 #define local_jcc(assembler_cond, label) \
3897 if (&(label) == &L_fallthrough) jccb(assembler_cond, label); \
3898 else jcc( assembler_cond, label) /*omit semi*/
3899
3900 // Hacked jmp, which may only be used just before L_fallthrough.
3901 #define final_jmp(label) \
3902 if (&(label) == &L_fallthrough) { /*do nothing*/ } \
3903 else jmp(label) /*omit semi*/
3904
3905 // If the pointers are equal, we are done (e.g., String[] elements).
3906 // This self-check enables sharing of secondary supertype arrays among
3907 // non-primary types such as array-of-interface. Otherwise, each such
3908 // type would need its own customized SSA.
3909 // We move this check to the front of the fast path because many
3910 // type checks are in fact trivially successful in this manner,
3911 // so we get a nicely predicted branch right at the start of the check.
3912 cmpptr(sub_klass, super_klass);
3913 local_jcc(Assembler::equal, *L_success);
3914
3915 // Check the supertype display:
3916 if (must_load_sco) {
3917 // Positive movl does right thing on LP64.
3918 movl(temp_reg, super_check_offset_addr);
3919 super_check_offset = RegisterOrConstant(temp_reg);
3920 }
3921 Address super_check_addr(sub_klass, super_check_offset, Address::times_1, 0);
3922 cmpptr(super_klass, super_check_addr); // load displayed supertype
3923
3924 // This check has worked decisively for primary supers.
3925 // Secondary supers are sought in the super_cache ('super_cache_addr').
3926 // (Secondary supers are interfaces and very deeply nested subtypes.)
3927 // This works in the same check above because of a tricky aliasing
3928 // between the super_cache and the primary super display elements.
3929 // (The 'super_check_addr' can address either, as the case requires.)
3930 // Note that the cache is updated below if it does not help us find
3931 // what we need immediately.
3932 // So if it was a primary super, we can just fail immediately.
3933 // Otherwise, it's the slow path for us (no success at this point).
3934
3935 if (super_check_offset.is_register()) {
3936 local_jcc(Assembler::equal, *L_success);
3937 cmpl(super_check_offset.as_register(), sc_offset);
3938 if (L_failure == &L_fallthrough) {
3939 local_jcc(Assembler::equal, *L_slow_path);
3940 } else {
3941 local_jcc(Assembler::notEqual, *L_failure);
3942 final_jmp(*L_slow_path);
3943 }
3944 } else if (super_check_offset.as_constant() == sc_offset) {
3945 // Need a slow path; fast failure is impossible.
3946 if (L_slow_path == &L_fallthrough) {
3947 local_jcc(Assembler::equal, *L_success);
3948 } else {
3949 local_jcc(Assembler::notEqual, *L_slow_path);
3950 final_jmp(*L_success);
3951 }
3952 } else {
3953 // No slow path; it's a fast decision.
3954 if (L_failure == &L_fallthrough) {
3955 local_jcc(Assembler::equal, *L_success);
3956 } else {
3957 local_jcc(Assembler::notEqual, *L_failure);
3958 final_jmp(*L_success);
3959 }
3960 }
3961
3962 bind(L_fallthrough);
3963
3964 #undef local_jcc
3965 #undef final_jmp
3966 }
3967
3968
3969 void MacroAssembler::check_klass_subtype_slow_path_linear(Register sub_klass,
3970 Register super_klass,
3971 Register temp_reg,
3972 Register temp2_reg,
3973 Label* L_success,
3974 Label* L_failure,
3975 bool set_cond_codes) {
3976 assert_different_registers(sub_klass, super_klass, temp_reg);
3977 if (temp2_reg != noreg)
3978 assert_different_registers(sub_klass, super_klass, temp_reg, temp2_reg);
3979 #define IS_A_TEMP(reg) ((reg) == temp_reg || (reg) == temp2_reg)
3980
3981 Label L_fallthrough;
3982 int label_nulls = 0;
3983 if (L_success == nullptr) { L_success = &L_fallthrough; label_nulls++; }
3984 if (L_failure == nullptr) { L_failure = &L_fallthrough; label_nulls++; }
3985 assert(label_nulls <= 1, "at most one null in the batch");
3986
3987 // a couple of useful fields in sub_klass:
3988 int ss_offset = in_bytes(Klass::secondary_supers_offset());
3989 int sc_offset = in_bytes(Klass::secondary_super_cache_offset());
3990 Address secondary_supers_addr(sub_klass, ss_offset);
3991 Address super_cache_addr( sub_klass, sc_offset);
3992
3993 // Do a linear scan of the secondary super-klass chain.
3994 // This code is rarely used, so simplicity is a virtue here.
3995 // The repne_scan instruction uses fixed registers, which we must spill.
3996 // Don't worry too much about pre-existing connections with the input regs.
3997
3998 assert(sub_klass != rax, "killed reg"); // killed by mov(rax, super)
3999 assert(sub_klass != rcx, "killed reg"); // killed by lea(rcx, &pst_counter)
4000
4001 // Get super_klass value into rax (even if it was in rdi or rcx).
4002 bool pushed_rax = false, pushed_rcx = false, pushed_rdi = false;
4003 if (super_klass != rax) {
4004 if (!IS_A_TEMP(rax)) { push(rax); pushed_rax = true; }
4005 mov(rax, super_klass);
4006 }
4007 if (!IS_A_TEMP(rcx)) { push(rcx); pushed_rcx = true; }
4008 if (!IS_A_TEMP(rdi)) { push(rdi); pushed_rdi = true; }
4009
4010 #ifndef PRODUCT
4011 uint* pst_counter = &SharedRuntime::_partial_subtype_ctr;
4012 ExternalAddress pst_counter_addr((address) pst_counter);
4013 lea(rcx, pst_counter_addr);
4014 incrementl(Address(rcx, 0));
4015 #endif //PRODUCT
4016
4017 // We will consult the secondary-super array.
4018 movptr(rdi, secondary_supers_addr);
4019 // Load the array length. (Positive movl does right thing on LP64.)
4020 movl(rcx, Address(rdi, Array<Klass*>::length_offset_in_bytes()));
4021 // Skip to start of data.
4022 addptr(rdi, Array<Klass*>::base_offset_in_bytes());
4023
4024 // Scan RCX words at [RDI] for an occurrence of RAX.
4025 // Set NZ/Z based on last compare.
4026 // Z flag value will not be set by 'repne' if RCX == 0 since 'repne' does
4027 // not change flags (only scas instruction which is repeated sets flags).
4028 // Set Z = 0 (not equal) before 'repne' to indicate that class was not found.
4029
4030 testptr(rax,rax); // Set Z = 0
4031 repne_scan();
4032
4033 // Unspill the temp. registers:
4034 if (pushed_rdi) pop(rdi);
4035 if (pushed_rcx) pop(rcx);
4036 if (pushed_rax) pop(rax);
4037
4038 if (set_cond_codes) {
4039 // Special hack for the AD files: rdi is guaranteed non-zero.
4040 assert(!pushed_rdi, "rdi must be left non-null");
4041 // Also, the condition codes are properly set Z/NZ on succeed/failure.
4042 }
4043
4044 if (L_failure == &L_fallthrough)
4045 jccb(Assembler::notEqual, *L_failure);
4046 else jcc(Assembler::notEqual, *L_failure);
4047
4048 // Success. Cache the super we found and proceed in triumph.
4049 movptr(super_cache_addr, super_klass);
4050
4051 if (L_success != &L_fallthrough) {
4052 jmp(*L_success);
4053 }
4054
4055 #undef IS_A_TEMP
4056
4057 bind(L_fallthrough);
4058 }
4059
4060 void MacroAssembler::check_klass_subtype_slow_path(Register sub_klass,
4061 Register super_klass,
4062 Register temp_reg,
4063 Register temp2_reg,
4064 Label* L_success,
4065 Label* L_failure,
4066 bool set_cond_codes) {
4067 assert(set_cond_codes == false, "must be false on 64-bit x86");
4068 check_klass_subtype_slow_path
4069 (sub_klass, super_klass, temp_reg, temp2_reg, noreg, noreg,
4070 L_success, L_failure);
4071 }
4072
4073 void MacroAssembler::check_klass_subtype_slow_path(Register sub_klass,
4074 Register super_klass,
4075 Register temp_reg,
4076 Register temp2_reg,
4077 Register temp3_reg,
4078 Register temp4_reg,
4079 Label* L_success,
4080 Label* L_failure) {
4081 if (UseSecondarySupersTable) {
4082 check_klass_subtype_slow_path_table
4083 (sub_klass, super_klass, temp_reg, temp2_reg, temp3_reg, temp4_reg,
4084 L_success, L_failure);
4085 } else {
4086 check_klass_subtype_slow_path_linear
4087 (sub_klass, super_klass, temp_reg, temp2_reg, L_success, L_failure, /*set_cond_codes*/false);
4088 }
4089 }
4090
4091 Register MacroAssembler::allocate_if_noreg(Register r,
4092 RegSetIterator<Register> &available_regs,
4093 RegSet ®s_to_push) {
4094 if (!r->is_valid()) {
4095 r = *available_regs++;
4096 regs_to_push += r;
4097 }
4098 return r;
4099 }
4100
4101 void MacroAssembler::check_klass_subtype_slow_path_table(Register sub_klass,
4102 Register super_klass,
4103 Register temp_reg,
4104 Register temp2_reg,
4105 Register temp3_reg,
4106 Register result_reg,
4107 Label* L_success,
4108 Label* L_failure) {
4109 // NB! Callers may assume that, when temp2_reg is a valid register,
4110 // this code sets it to a nonzero value.
4111 bool temp2_reg_was_valid = temp2_reg->is_valid();
4112
4113 RegSet temps = RegSet::of(temp_reg, temp2_reg, temp3_reg);
4114
4115 Label L_fallthrough;
4116 int label_nulls = 0;
4117 if (L_success == nullptr) { L_success = &L_fallthrough; label_nulls++; }
4118 if (L_failure == nullptr) { L_failure = &L_fallthrough; label_nulls++; }
4119 assert(label_nulls <= 1, "at most one null in the batch");
4120
4121 BLOCK_COMMENT("check_klass_subtype_slow_path_table");
4122
4123 RegSetIterator<Register> available_regs
4124 = (RegSet::of(rax, rcx, rdx, r8) + r9 + r10 + r11 + r12 - temps - sub_klass - super_klass).begin();
4125
4126 RegSet pushed_regs;
4127
4128 temp_reg = allocate_if_noreg(temp_reg, available_regs, pushed_regs);
4129 temp2_reg = allocate_if_noreg(temp2_reg, available_regs, pushed_regs);
4130 temp3_reg = allocate_if_noreg(temp3_reg, available_regs, pushed_regs);
4131 result_reg = allocate_if_noreg(result_reg, available_regs, pushed_regs);
4132 Register temp4_reg = allocate_if_noreg(noreg, available_regs, pushed_regs);
4133
4134 assert_different_registers(sub_klass, super_klass, temp_reg, temp2_reg, temp3_reg, result_reg);
4135
4136 {
4137
4138 int register_push_size = pushed_regs.size() * Register::max_slots_per_register * VMRegImpl::stack_slot_size;
4139 int aligned_size = align_up(register_push_size, StackAlignmentInBytes);
4140 subptr(rsp, aligned_size);
4141 push_set(pushed_regs, 0);
4142
4143 lookup_secondary_supers_table_var(sub_klass,
4144 super_klass,
4145 temp_reg, temp2_reg, temp3_reg, temp4_reg, result_reg);
4146 cmpq(result_reg, 0);
4147
4148 // Unspill the temp. registers:
4149 pop_set(pushed_regs, 0);
4150 // Increment SP but do not clobber flags.
4151 lea(rsp, Address(rsp, aligned_size));
4152 }
4153
4154 if (temp2_reg_was_valid) {
4155 movq(temp2_reg, 1);
4156 }
4157
4158 jcc(Assembler::notEqual, *L_failure);
4159
4160 if (L_success != &L_fallthrough) {
4161 jmp(*L_success);
4162 }
4163
4164 bind(L_fallthrough);
4165 }
4166
4167 // population_count variant for running without the POPCNT
4168 // instruction, which was introduced with SSE4.2 in 2008.
4169 void MacroAssembler::population_count(Register dst, Register src,
4170 Register scratch1, Register scratch2) {
4171 assert_different_registers(src, scratch1, scratch2);
4172 if (UsePopCountInstruction) {
4173 Assembler::popcntq(dst, src);
4174 } else {
4175 assert_different_registers(src, scratch1, scratch2);
4176 assert_different_registers(dst, scratch1, scratch2);
4177 Label loop, done;
4178
4179 mov(scratch1, src);
4180 // dst = 0;
4181 // while(scratch1 != 0) {
4182 // dst++;
4183 // scratch1 &= (scratch1 - 1);
4184 // }
4185 xorl(dst, dst);
4186 testq(scratch1, scratch1);
4187 jccb(Assembler::equal, done);
4188 {
4189 bind(loop);
4190 incq(dst);
4191 movq(scratch2, scratch1);
4192 decq(scratch2);
4193 andq(scratch1, scratch2);
4194 jccb(Assembler::notEqual, loop);
4195 }
4196 bind(done);
4197 }
4198 #ifdef ASSERT
4199 mov64(scratch1, 0xCafeBabeDeadBeef);
4200 movq(scratch2, scratch1);
4201 #endif
4202 }
4203
4204 // Ensure that the inline code and the stub are using the same registers.
4205 #define LOOKUP_SECONDARY_SUPERS_TABLE_REGISTERS \
4206 do { \
4207 assert(r_super_klass == rax, "mismatch"); \
4208 assert(r_array_base == rbx, "mismatch"); \
4209 assert(r_array_length == rcx, "mismatch"); \
4210 assert(r_array_index == rdx, "mismatch"); \
4211 assert(r_sub_klass == rsi || r_sub_klass == noreg, "mismatch"); \
4212 assert(r_bitmap == r11 || r_bitmap == noreg, "mismatch"); \
4213 assert(result == rdi || result == noreg, "mismatch"); \
4214 } while(0)
4215
4216 // Versions of salq and rorq that don't need count to be in rcx
4217
4218 void MacroAssembler::salq(Register dest, Register count) {
4219 if (count == rcx) {
4220 Assembler::salq(dest);
4221 } else {
4222 assert_different_registers(rcx, dest);
4223 xchgq(rcx, count);
4224 Assembler::salq(dest);
4225 xchgq(rcx, count);
4226 }
4227 }
4228
4229 void MacroAssembler::rorq(Register dest, Register count) {
4230 if (count == rcx) {
4231 Assembler::rorq(dest);
4232 } else {
4233 assert_different_registers(rcx, dest);
4234 xchgq(rcx, count);
4235 Assembler::rorq(dest);
4236 xchgq(rcx, count);
4237 }
4238 }
4239
4240 // Return true: we succeeded in generating this code
4241 //
4242 // At runtime, return 0 in result if r_super_klass is a superclass of
4243 // r_sub_klass, otherwise return nonzero. Use this if you know the
4244 // super_klass_slot of the class you're looking for. This is always
4245 // the case for instanceof and checkcast.
4246 void MacroAssembler::lookup_secondary_supers_table_const(Register r_sub_klass,
4247 Register r_super_klass,
4248 Register temp1,
4249 Register temp2,
4250 Register temp3,
4251 Register temp4,
4252 Register result,
4253 u1 super_klass_slot) {
4254 assert_different_registers(r_sub_klass, r_super_klass, temp1, temp2, temp3, temp4, result);
4255
4256 Label L_fallthrough, L_success, L_failure;
4257
4258 BLOCK_COMMENT("lookup_secondary_supers_table {");
4259
4260 const Register
4261 r_array_index = temp1,
4262 r_array_length = temp2,
4263 r_array_base = temp3,
4264 r_bitmap = temp4;
4265
4266 LOOKUP_SECONDARY_SUPERS_TABLE_REGISTERS;
4267
4268 xorq(result, result); // = 0
4269
4270 movq(r_bitmap, Address(r_sub_klass, Klass::secondary_supers_bitmap_offset()));
4271 movq(r_array_index, r_bitmap);
4272
4273 // First check the bitmap to see if super_klass might be present. If
4274 // the bit is zero, we are certain that super_klass is not one of
4275 // the secondary supers.
4276 u1 bit = super_klass_slot;
4277 {
4278 // NB: If the count in a x86 shift instruction is 0, the flags are
4279 // not affected, so we do a testq instead.
4280 int shift_count = Klass::SECONDARY_SUPERS_TABLE_MASK - bit;
4281 if (shift_count != 0) {
4282 salq(r_array_index, shift_count);
4283 } else {
4284 testq(r_array_index, r_array_index);
4285 }
4286 }
4287 // We test the MSB of r_array_index, i.e. its sign bit
4288 jcc(Assembler::positive, L_failure);
4289
4290 // Get the first array index that can contain super_klass into r_array_index.
4291 if (bit != 0) {
4292 population_count(r_array_index, r_array_index, temp2, temp3);
4293 } else {
4294 movl(r_array_index, 1);
4295 }
4296 // NB! r_array_index is off by 1. It is compensated by keeping r_array_base off by 1 word.
4297
4298 // We will consult the secondary-super array.
4299 movptr(r_array_base, Address(r_sub_klass, in_bytes(Klass::secondary_supers_offset())));
4300
4301 // We're asserting that the first word in an Array<Klass*> is the
4302 // length, and the second word is the first word of the data. If
4303 // that ever changes, r_array_base will have to be adjusted here.
4304 assert(Array<Klass*>::base_offset_in_bytes() == wordSize, "Adjust this code");
4305 assert(Array<Klass*>::length_offset_in_bytes() == 0, "Adjust this code");
4306
4307 cmpq(r_super_klass, Address(r_array_base, r_array_index, Address::times_8));
4308 jccb(Assembler::equal, L_success);
4309
4310 // Is there another entry to check? Consult the bitmap.
4311 btq(r_bitmap, (bit + 1) & Klass::SECONDARY_SUPERS_TABLE_MASK);
4312 jccb(Assembler::carryClear, L_failure);
4313
4314 // Linear probe. Rotate the bitmap so that the next bit to test is
4315 // in Bit 1.
4316 if (bit != 0) {
4317 rorq(r_bitmap, bit);
4318 }
4319
4320 // Calls into the stub generated by lookup_secondary_supers_table_slow_path.
4321 // Arguments: r_super_klass, r_array_base, r_array_index, r_bitmap.
4322 // Kills: r_array_length.
4323 // Returns: result.
4324 call(RuntimeAddress(StubRoutines::lookup_secondary_supers_table_slow_path_stub()));
4325 // Result (0/1) is in rdi
4326 jmpb(L_fallthrough);
4327
4328 bind(L_failure);
4329 incq(result); // 0 => 1
4330
4331 bind(L_success);
4332 // result = 0;
4333
4334 bind(L_fallthrough);
4335 BLOCK_COMMENT("} lookup_secondary_supers_table");
4336
4337 if (VerifySecondarySupers) {
4338 verify_secondary_supers_table(r_sub_klass, r_super_klass, result,
4339 temp1, temp2, temp3);
4340 }
4341 }
4342
4343 // At runtime, return 0 in result if r_super_klass is a superclass of
4344 // r_sub_klass, otherwise return nonzero. Use this version of
4345 // lookup_secondary_supers_table() if you don't know ahead of time
4346 // which superclass will be searched for. Used by interpreter and
4347 // runtime stubs. It is larger and has somewhat greater latency than
4348 // the version above, which takes a constant super_klass_slot.
4349 void MacroAssembler::lookup_secondary_supers_table_var(Register r_sub_klass,
4350 Register r_super_klass,
4351 Register temp1,
4352 Register temp2,
4353 Register temp3,
4354 Register temp4,
4355 Register result) {
4356 assert_different_registers(r_sub_klass, r_super_klass, temp1, temp2, temp3, temp4, result);
4357 assert_different_registers(r_sub_klass, r_super_klass, rcx);
4358 RegSet temps = RegSet::of(temp1, temp2, temp3, temp4);
4359
4360 Label L_fallthrough, L_success, L_failure;
4361
4362 BLOCK_COMMENT("lookup_secondary_supers_table {");
4363
4364 RegSetIterator<Register> available_regs = (temps - rcx).begin();
4365
4366 // FIXME. Once we are sure that all paths reaching this point really
4367 // do pass rcx as one of our temps we can get rid of the following
4368 // workaround.
4369 assert(temps.contains(rcx), "fix this code");
4370
4371 // We prefer to have our shift count in rcx. If rcx is one of our
4372 // temps, use it for slot. If not, pick any of our temps.
4373 Register slot;
4374 if (!temps.contains(rcx)) {
4375 slot = *available_regs++;
4376 } else {
4377 slot = rcx;
4378 }
4379
4380 const Register r_array_index = *available_regs++;
4381 const Register r_bitmap = *available_regs++;
4382
4383 // The logic above guarantees this property, but we state it here.
4384 assert_different_registers(r_array_index, r_bitmap, rcx);
4385
4386 movq(r_bitmap, Address(r_sub_klass, Klass::secondary_supers_bitmap_offset()));
4387 movq(r_array_index, r_bitmap);
4388
4389 // First check the bitmap to see if super_klass might be present. If
4390 // the bit is zero, we are certain that super_klass is not one of
4391 // the secondary supers.
4392 movb(slot, Address(r_super_klass, Klass::hash_slot_offset()));
4393 xorl(slot, (u1)(Klass::SECONDARY_SUPERS_TABLE_SIZE - 1)); // slot ^ 63 === 63 - slot (mod 64)
4394 salq(r_array_index, slot);
4395
4396 testq(r_array_index, r_array_index);
4397 // We test the MSB of r_array_index, i.e. its sign bit
4398 jcc(Assembler::positive, L_failure);
4399
4400 const Register r_array_base = *available_regs++;
4401
4402 // Get the first array index that can contain super_klass into r_array_index.
4403 // Note: Clobbers r_array_base and slot.
4404 population_count(r_array_index, r_array_index, /*temp2*/r_array_base, /*temp3*/slot);
4405
4406 // NB! r_array_index is off by 1. It is compensated by keeping r_array_base off by 1 word.
4407
4408 // We will consult the secondary-super array.
4409 movptr(r_array_base, Address(r_sub_klass, in_bytes(Klass::secondary_supers_offset())));
4410
4411 // We're asserting that the first word in an Array<Klass*> is the
4412 // length, and the second word is the first word of the data. If
4413 // that ever changes, r_array_base will have to be adjusted here.
4414 assert(Array<Klass*>::base_offset_in_bytes() == wordSize, "Adjust this code");
4415 assert(Array<Klass*>::length_offset_in_bytes() == 0, "Adjust this code");
4416
4417 cmpq(r_super_klass, Address(r_array_base, r_array_index, Address::times_8));
4418 jccb(Assembler::equal, L_success);
4419
4420 // Restore slot to its true value
4421 movb(slot, Address(r_super_klass, Klass::hash_slot_offset()));
4422
4423 // Linear probe. Rotate the bitmap so that the next bit to test is
4424 // in Bit 1.
4425 rorq(r_bitmap, slot);
4426
4427 // Is there another entry to check? Consult the bitmap.
4428 btq(r_bitmap, 1);
4429 jccb(Assembler::carryClear, L_failure);
4430
4431 // Calls into the stub generated by lookup_secondary_supers_table_slow_path.
4432 // Arguments: r_super_klass, r_array_base, r_array_index, r_bitmap.
4433 // Kills: r_array_length.
4434 // Returns: result.
4435 lookup_secondary_supers_table_slow_path(r_super_klass,
4436 r_array_base,
4437 r_array_index,
4438 r_bitmap,
4439 /*temp1*/result,
4440 /*temp2*/slot,
4441 &L_success,
4442 nullptr);
4443
4444 bind(L_failure);
4445 movq(result, 1);
4446 jmpb(L_fallthrough);
4447
4448 bind(L_success);
4449 xorq(result, result); // = 0
4450
4451 bind(L_fallthrough);
4452 BLOCK_COMMENT("} lookup_secondary_supers_table");
4453
4454 if (VerifySecondarySupers) {
4455 verify_secondary_supers_table(r_sub_klass, r_super_klass, result,
4456 temp1, temp2, temp3);
4457 }
4458 }
4459
4460 void MacroAssembler::repne_scanq(Register addr, Register value, Register count, Register limit,
4461 Label* L_success, Label* L_failure) {
4462 Label L_loop, L_fallthrough;
4463 {
4464 int label_nulls = 0;
4465 if (L_success == nullptr) { L_success = &L_fallthrough; label_nulls++; }
4466 if (L_failure == nullptr) { L_failure = &L_fallthrough; label_nulls++; }
4467 assert(label_nulls <= 1, "at most one null in the batch");
4468 }
4469 bind(L_loop);
4470 cmpq(value, Address(addr, count, Address::times_8));
4471 jcc(Assembler::equal, *L_success);
4472 addl(count, 1);
4473 cmpl(count, limit);
4474 jcc(Assembler::less, L_loop);
4475
4476 if (&L_fallthrough != L_failure) {
4477 jmp(*L_failure);
4478 }
4479 bind(L_fallthrough);
4480 }
4481
4482 // Called by code generated by check_klass_subtype_slow_path
4483 // above. This is called when there is a collision in the hashed
4484 // lookup in the secondary supers array.
4485 void MacroAssembler::lookup_secondary_supers_table_slow_path(Register r_super_klass,
4486 Register r_array_base,
4487 Register r_array_index,
4488 Register r_bitmap,
4489 Register temp1,
4490 Register temp2,
4491 Label* L_success,
4492 Label* L_failure) {
4493 assert_different_registers(r_super_klass, r_array_base, r_array_index, r_bitmap, temp1, temp2);
4494
4495 const Register
4496 r_array_length = temp1,
4497 r_sub_klass = noreg,
4498 result = noreg;
4499
4500 Label L_fallthrough;
4501 int label_nulls = 0;
4502 if (L_success == nullptr) { L_success = &L_fallthrough; label_nulls++; }
4503 if (L_failure == nullptr) { L_failure = &L_fallthrough; label_nulls++; }
4504 assert(label_nulls <= 1, "at most one null in the batch");
4505
4506 // Load the array length.
4507 movl(r_array_length, Address(r_array_base, Array<Klass*>::length_offset_in_bytes()));
4508 // And adjust the array base to point to the data.
4509 // NB! Effectively increments current slot index by 1.
4510 assert(Array<Klass*>::base_offset_in_bytes() == wordSize, "");
4511 addptr(r_array_base, Array<Klass*>::base_offset_in_bytes());
4512
4513 // Linear probe
4514 Label L_huge;
4515
4516 // The bitmap is full to bursting.
4517 // Implicit invariant: BITMAP_FULL implies (length > 0)
4518 cmpl(r_array_length, (int32_t)Klass::SECONDARY_SUPERS_TABLE_SIZE - 2);
4519 jcc(Assembler::greater, L_huge);
4520
4521 // NB! Our caller has checked bits 0 and 1 in the bitmap. The
4522 // current slot (at secondary_supers[r_array_index]) has not yet
4523 // been inspected, and r_array_index may be out of bounds if we
4524 // wrapped around the end of the array.
4525
4526 { // This is conventional linear probing, but instead of terminating
4527 // when a null entry is found in the table, we maintain a bitmap
4528 // in which a 0 indicates missing entries.
4529 // The check above guarantees there are 0s in the bitmap, so the loop
4530 // eventually terminates.
4531
4532 xorl(temp2, temp2); // = 0;
4533
4534 Label L_again;
4535 bind(L_again);
4536
4537 // Check for array wraparound.
4538 cmpl(r_array_index, r_array_length);
4539 cmovl(Assembler::greaterEqual, r_array_index, temp2);
4540
4541 cmpq(r_super_klass, Address(r_array_base, r_array_index, Address::times_8));
4542 jcc(Assembler::equal, *L_success);
4543
4544 // If the next bit in bitmap is zero, we're done.
4545 btq(r_bitmap, 2); // look-ahead check (Bit 2); Bits 0 and 1 are tested by now
4546 jcc(Assembler::carryClear, *L_failure);
4547
4548 rorq(r_bitmap, 1); // Bits 1/2 => 0/1
4549 addl(r_array_index, 1);
4550
4551 jmp(L_again);
4552 }
4553
4554 { // Degenerate case: more than 64 secondary supers.
4555 // FIXME: We could do something smarter here, maybe a vectorized
4556 // comparison or a binary search, but is that worth any added
4557 // complexity?
4558 bind(L_huge);
4559 xorl(r_array_index, r_array_index); // = 0
4560 repne_scanq(r_array_base, r_super_klass, r_array_index, r_array_length,
4561 L_success,
4562 (&L_fallthrough != L_failure ? L_failure : nullptr));
4563
4564 bind(L_fallthrough);
4565 }
4566 }
4567
4568 struct VerifyHelperArguments {
4569 Klass* _super;
4570 Klass* _sub;
4571 intptr_t _linear_result;
4572 intptr_t _table_result;
4573 };
4574
4575 static void verify_secondary_supers_table_helper(const char* msg, VerifyHelperArguments* args) {
4576 Klass::on_secondary_supers_verification_failure(args->_super,
4577 args->_sub,
4578 args->_linear_result,
4579 args->_table_result,
4580 msg);
4581 }
4582
4583 // Make sure that the hashed lookup and a linear scan agree.
4584 void MacroAssembler::verify_secondary_supers_table(Register r_sub_klass,
4585 Register r_super_klass,
4586 Register result,
4587 Register temp1,
4588 Register temp2,
4589 Register temp3) {
4590 const Register
4591 r_array_index = temp1,
4592 r_array_length = temp2,
4593 r_array_base = temp3,
4594 r_bitmap = noreg;
4595
4596 BLOCK_COMMENT("verify_secondary_supers_table {");
4597
4598 Label L_success, L_failure, L_check, L_done;
4599
4600 movptr(r_array_base, Address(r_sub_klass, in_bytes(Klass::secondary_supers_offset())));
4601 movl(r_array_length, Address(r_array_base, Array<Klass*>::length_offset_in_bytes()));
4602 // And adjust the array base to point to the data.
4603 addptr(r_array_base, Array<Klass*>::base_offset_in_bytes());
4604
4605 testl(r_array_length, r_array_length); // array_length == 0?
4606 jcc(Assembler::zero, L_failure);
4607
4608 movl(r_array_index, 0);
4609 repne_scanq(r_array_base, r_super_klass, r_array_index, r_array_length, &L_success);
4610 // fall through to L_failure
4611
4612 const Register linear_result = r_array_index; // reuse temp1
4613
4614 bind(L_failure); // not present
4615 movl(linear_result, 1);
4616 jmp(L_check);
4617
4618 bind(L_success); // present
4619 movl(linear_result, 0);
4620
4621 bind(L_check);
4622 cmpl(linear_result, result);
4623 jcc(Assembler::equal, L_done);
4624
4625 { // To avoid calling convention issues, build a record on the stack
4626 // and pass the pointer to that instead.
4627 push(result);
4628 push(linear_result);
4629 push(r_sub_klass);
4630 push(r_super_klass);
4631 movptr(c_rarg1, rsp);
4632 movptr(c_rarg0, (uintptr_t) "mismatch");
4633 call(RuntimeAddress(CAST_FROM_FN_PTR(address, verify_secondary_supers_table_helper)));
4634 should_not_reach_here();
4635 }
4636 bind(L_done);
4637
4638 BLOCK_COMMENT("} verify_secondary_supers_table");
4639 }
4640
4641 #undef LOOKUP_SECONDARY_SUPERS_TABLE_REGISTERS
4642
4643 void MacroAssembler::clinit_barrier(Register klass, Label* L_fast_path, Label* L_slow_path) {
4644 assert(L_fast_path != nullptr || L_slow_path != nullptr, "at least one is required");
4645
4646 Label L_fallthrough;
4647 if (L_fast_path == nullptr) {
4648 L_fast_path = &L_fallthrough;
4649 } else if (L_slow_path == nullptr) {
4650 L_slow_path = &L_fallthrough;
4651 }
4652
4653 // Fast path check: class is fully initialized.
4654 // init_state needs acquire, but x86 is TSO, and so we are already good.
4655 cmpb(Address(klass, InstanceKlass::init_state_offset()), InstanceKlass::fully_initialized);
4656 jcc(Assembler::equal, *L_fast_path);
4657
4658 // Fast path check: current thread is initializer thread
4659 cmpptr(r15_thread, Address(klass, InstanceKlass::init_thread_offset()));
4660 if (L_slow_path == &L_fallthrough) {
4661 jcc(Assembler::equal, *L_fast_path);
4662 bind(*L_slow_path);
4663 } else if (L_fast_path == &L_fallthrough) {
4664 jcc(Assembler::notEqual, *L_slow_path);
4665 bind(*L_fast_path);
4666 } else {
4667 Unimplemented();
4668 }
4669 }
4670
4671 void MacroAssembler::cmov32(Condition cc, Register dst, Address src) {
4672 if (VM_Version::supports_cmov()) {
4673 cmovl(cc, dst, src);
4674 } else {
4675 Label L;
4676 jccb(negate_condition(cc), L);
4677 movl(dst, src);
4678 bind(L);
4679 }
4680 }
4681
4682 void MacroAssembler::cmov32(Condition cc, Register dst, Register src) {
4683 if (VM_Version::supports_cmov()) {
4684 cmovl(cc, dst, src);
4685 } else {
4686 Label L;
4687 jccb(negate_condition(cc), L);
4688 movl(dst, src);
4689 bind(L);
4690 }
4691 }
4692
4693 void MacroAssembler::_verify_oop(Register reg, const char* s, const char* file, int line) {
4694 if (!VerifyOops) return;
4695
4696 BLOCK_COMMENT("verify_oop {");
4697 push(rscratch1);
4698 push(rax); // save rax
4699 push(reg); // pass register argument
4700
4701 // Pass register number to verify_oop_subroutine
4702 const char* b = nullptr;
4703 {
4704 ResourceMark rm;
4705 stringStream ss;
4706 ss.print("verify_oop: %s: %s (%s:%d)", reg->name(), s, file, line);
4707 b = code_string(ss.as_string());
4708 }
4709 AddressLiteral buffer((address) b, external_word_Relocation::spec_for_immediate());
4710 pushptr(buffer.addr(), rscratch1);
4711
4712 // call indirectly to solve generation ordering problem
4713 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address()));
4714 call(rax);
4715 // Caller pops the arguments (oop, message) and restores rax, r10
4716 BLOCK_COMMENT("} verify_oop");
4717 }
4718
4719 void MacroAssembler::vallones(XMMRegister dst, int vector_len) {
4720 if (UseAVX > 2 && (vector_len == Assembler::AVX_512bit || VM_Version::supports_avx512vl())) {
4721 // Only pcmpeq has dependency breaking treatment (i.e the execution can begin without
4722 // waiting for the previous result on dst), not vpcmpeqd, so just use vpternlog
4723 vpternlogd(dst, 0xFF, dst, dst, vector_len);
4724 } else if (VM_Version::supports_avx()) {
4725 vpcmpeqd(dst, dst, dst, vector_len);
4726 } else {
4727 pcmpeqd(dst, dst);
4728 }
4729 }
4730
4731 Address MacroAssembler::argument_address(RegisterOrConstant arg_slot,
4732 int extra_slot_offset) {
4733 // cf. TemplateTable::prepare_invoke(), if (load_receiver).
4734 int stackElementSize = Interpreter::stackElementSize;
4735 int offset = Interpreter::expr_offset_in_bytes(extra_slot_offset+0);
4736 #ifdef ASSERT
4737 int offset1 = Interpreter::expr_offset_in_bytes(extra_slot_offset+1);
4738 assert(offset1 - offset == stackElementSize, "correct arithmetic");
4739 #endif
4740 Register scale_reg = noreg;
4741 Address::ScaleFactor scale_factor = Address::no_scale;
4742 if (arg_slot.is_constant()) {
4743 offset += arg_slot.as_constant() * stackElementSize;
4744 } else {
4745 scale_reg = arg_slot.as_register();
4746 scale_factor = Address::times(stackElementSize);
4747 }
4748 offset += wordSize; // return PC is on stack
4749 return Address(rsp, scale_reg, scale_factor, offset);
4750 }
4751
4752 void MacroAssembler::_verify_oop_addr(Address addr, const char* s, const char* file, int line) {
4753 if (!VerifyOops) return;
4754
4755 push(rscratch1);
4756 push(rax); // save rax,
4757 // addr may contain rsp so we will have to adjust it based on the push
4758 // we just did (and on 64 bit we do two pushes)
4759 // NOTE: 64bit seemed to have had a bug in that it did movq(addr, rax); which
4760 // stores rax into addr which is backwards of what was intended.
4761 if (addr.uses(rsp)) {
4762 lea(rax, addr);
4763 pushptr(Address(rax, 2 * BytesPerWord));
4764 } else {
4765 pushptr(addr);
4766 }
4767
4768 // Pass register number to verify_oop_subroutine
4769 const char* b = nullptr;
4770 {
4771 ResourceMark rm;
4772 stringStream ss;
4773 ss.print("verify_oop_addr: %s (%s:%d)", s, file, line);
4774 b = code_string(ss.as_string());
4775 }
4776 AddressLiteral buffer((address) b, external_word_Relocation::spec_for_immediate());
4777 pushptr(buffer.addr(), rscratch1);
4778
4779 // call indirectly to solve generation ordering problem
4780 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address()));
4781 call(rax);
4782 // Caller pops the arguments (addr, message) and restores rax, r10.
4783 }
4784
4785 void MacroAssembler::verify_tlab() {
4786 #ifdef ASSERT
4787 if (UseTLAB && VerifyOops) {
4788 Label next, ok;
4789 Register t1 = rsi;
4790
4791 push(t1);
4792
4793 movptr(t1, Address(r15_thread, in_bytes(JavaThread::tlab_top_offset())));
4794 cmpptr(t1, Address(r15_thread, in_bytes(JavaThread::tlab_start_offset())));
4795 jcc(Assembler::aboveEqual, next);
4796 STOP("assert(top >= start)");
4797 should_not_reach_here();
4798
4799 bind(next);
4800 movptr(t1, Address(r15_thread, in_bytes(JavaThread::tlab_end_offset())));
4801 cmpptr(t1, Address(r15_thread, in_bytes(JavaThread::tlab_top_offset())));
4802 jcc(Assembler::aboveEqual, ok);
4803 STOP("assert(top <= end)");
4804 should_not_reach_here();
4805
4806 bind(ok);
4807 pop(t1);
4808 }
4809 #endif
4810 }
4811
4812 class ControlWord {
4813 public:
4814 int32_t _value;
4815
4816 int rounding_control() const { return (_value >> 10) & 3 ; }
4817 int precision_control() const { return (_value >> 8) & 3 ; }
4818 bool precision() const { return ((_value >> 5) & 1) != 0; }
4819 bool underflow() const { return ((_value >> 4) & 1) != 0; }
4820 bool overflow() const { return ((_value >> 3) & 1) != 0; }
4821 bool zero_divide() const { return ((_value >> 2) & 1) != 0; }
4822 bool denormalized() const { return ((_value >> 1) & 1) != 0; }
4823 bool invalid() const { return ((_value >> 0) & 1) != 0; }
4824
4825 void print() const {
4826 // rounding control
4827 const char* rc;
4828 switch (rounding_control()) {
4829 case 0: rc = "round near"; break;
4830 case 1: rc = "round down"; break;
4831 case 2: rc = "round up "; break;
4832 case 3: rc = "chop "; break;
4833 default:
4834 rc = nullptr; // silence compiler warnings
4835 fatal("Unknown rounding control: %d", rounding_control());
4836 };
4837 // precision control
4838 const char* pc;
4839 switch (precision_control()) {
4840 case 0: pc = "24 bits "; break;
4841 case 1: pc = "reserved"; break;
4842 case 2: pc = "53 bits "; break;
4843 case 3: pc = "64 bits "; break;
4844 default:
4845 pc = nullptr; // silence compiler warnings
4846 fatal("Unknown precision control: %d", precision_control());
4847 };
4848 // flags
4849 char f[9];
4850 f[0] = ' ';
4851 f[1] = ' ';
4852 f[2] = (precision ()) ? 'P' : 'p';
4853 f[3] = (underflow ()) ? 'U' : 'u';
4854 f[4] = (overflow ()) ? 'O' : 'o';
4855 f[5] = (zero_divide ()) ? 'Z' : 'z';
4856 f[6] = (denormalized()) ? 'D' : 'd';
4857 f[7] = (invalid ()) ? 'I' : 'i';
4858 f[8] = '\x0';
4859 // output
4860 printf("%04x masks = %s, %s, %s", _value & 0xFFFF, f, rc, pc);
4861 }
4862
4863 };
4864
4865 class StatusWord {
4866 public:
4867 int32_t _value;
4868
4869 bool busy() const { return ((_value >> 15) & 1) != 0; }
4870 bool C3() const { return ((_value >> 14) & 1) != 0; }
4871 bool C2() const { return ((_value >> 10) & 1) != 0; }
4872 bool C1() const { return ((_value >> 9) & 1) != 0; }
4873 bool C0() const { return ((_value >> 8) & 1) != 0; }
4874 int top() const { return (_value >> 11) & 7 ; }
4875 bool error_status() const { return ((_value >> 7) & 1) != 0; }
4876 bool stack_fault() const { return ((_value >> 6) & 1) != 0; }
4877 bool precision() const { return ((_value >> 5) & 1) != 0; }
4878 bool underflow() const { return ((_value >> 4) & 1) != 0; }
4879 bool overflow() const { return ((_value >> 3) & 1) != 0; }
4880 bool zero_divide() const { return ((_value >> 2) & 1) != 0; }
4881 bool denormalized() const { return ((_value >> 1) & 1) != 0; }
4882 bool invalid() const { return ((_value >> 0) & 1) != 0; }
4883
4884 void print() const {
4885 // condition codes
4886 char c[5];
4887 c[0] = (C3()) ? '3' : '-';
4888 c[1] = (C2()) ? '2' : '-';
4889 c[2] = (C1()) ? '1' : '-';
4890 c[3] = (C0()) ? '0' : '-';
4891 c[4] = '\x0';
4892 // flags
4893 char f[9];
4894 f[0] = (error_status()) ? 'E' : '-';
4895 f[1] = (stack_fault ()) ? 'S' : '-';
4896 f[2] = (precision ()) ? 'P' : '-';
4897 f[3] = (underflow ()) ? 'U' : '-';
4898 f[4] = (overflow ()) ? 'O' : '-';
4899 f[5] = (zero_divide ()) ? 'Z' : '-';
4900 f[6] = (denormalized()) ? 'D' : '-';
4901 f[7] = (invalid ()) ? 'I' : '-';
4902 f[8] = '\x0';
4903 // output
4904 printf("%04x flags = %s, cc = %s, top = %d", _value & 0xFFFF, f, c, top());
4905 }
4906
4907 };
4908
4909 class TagWord {
4910 public:
4911 int32_t _value;
4912
4913 int tag_at(int i) const { return (_value >> (i*2)) & 3; }
4914
4915 void print() const {
4916 printf("%04x", _value & 0xFFFF);
4917 }
4918
4919 };
4920
4921 class FPU_Register {
4922 public:
4923 int32_t _m0;
4924 int32_t _m1;
4925 int16_t _ex;
4926
4927 bool is_indefinite() const {
4928 return _ex == -1 && _m1 == (int32_t)0xC0000000 && _m0 == 0;
4929 }
4930
4931 void print() const {
4932 char sign = (_ex < 0) ? '-' : '+';
4933 const char* kind = (_ex == 0x7FFF || _ex == (int16_t)-1) ? "NaN" : " ";
4934 printf("%c%04hx.%08x%08x %s", sign, _ex, _m1, _m0, kind);
4935 };
4936
4937 };
4938
4939 class FPU_State {
4940 public:
4941 enum {
4942 register_size = 10,
4943 number_of_registers = 8,
4944 register_mask = 7
4945 };
4946
4947 ControlWord _control_word;
4948 StatusWord _status_word;
4949 TagWord _tag_word;
4950 int32_t _error_offset;
4951 int32_t _error_selector;
4952 int32_t _data_offset;
4953 int32_t _data_selector;
4954 int8_t _register[register_size * number_of_registers];
4955
4956 int tag_for_st(int i) const { return _tag_word.tag_at((_status_word.top() + i) & register_mask); }
4957 FPU_Register* st(int i) const { return (FPU_Register*)&_register[register_size * i]; }
4958
4959 const char* tag_as_string(int tag) const {
4960 switch (tag) {
4961 case 0: return "valid";
4962 case 1: return "zero";
4963 case 2: return "special";
4964 case 3: return "empty";
4965 }
4966 ShouldNotReachHere();
4967 return nullptr;
4968 }
4969
4970 void print() const {
4971 // print computation registers
4972 { int t = _status_word.top();
4973 for (int i = 0; i < number_of_registers; i++) {
4974 int j = (i - t) & register_mask;
4975 printf("%c r%d = ST%d = ", (j == 0 ? '*' : ' '), i, j);
4976 st(j)->print();
4977 printf(" %s\n", tag_as_string(_tag_word.tag_at(i)));
4978 }
4979 }
4980 printf("\n");
4981 // print control registers
4982 printf("ctrl = "); _control_word.print(); printf("\n");
4983 printf("stat = "); _status_word .print(); printf("\n");
4984 printf("tags = "); _tag_word .print(); printf("\n");
4985 }
4986
4987 };
4988
4989 class Flag_Register {
4990 public:
4991 int32_t _value;
4992
4993 bool overflow() const { return ((_value >> 11) & 1) != 0; }
4994 bool direction() const { return ((_value >> 10) & 1) != 0; }
4995 bool sign() const { return ((_value >> 7) & 1) != 0; }
4996 bool zero() const { return ((_value >> 6) & 1) != 0; }
4997 bool auxiliary_carry() const { return ((_value >> 4) & 1) != 0; }
4998 bool parity() const { return ((_value >> 2) & 1) != 0; }
4999 bool carry() const { return ((_value >> 0) & 1) != 0; }
5000
5001 void print() const {
5002 // flags
5003 char f[8];
5004 f[0] = (overflow ()) ? 'O' : '-';
5005 f[1] = (direction ()) ? 'D' : '-';
5006 f[2] = (sign ()) ? 'S' : '-';
5007 f[3] = (zero ()) ? 'Z' : '-';
5008 f[4] = (auxiliary_carry()) ? 'A' : '-';
5009 f[5] = (parity ()) ? 'P' : '-';
5010 f[6] = (carry ()) ? 'C' : '-';
5011 f[7] = '\x0';
5012 // output
5013 printf("%08x flags = %s", _value, f);
5014 }
5015
5016 };
5017
5018 class IU_Register {
5019 public:
5020 int32_t _value;
5021
5022 void print() const {
5023 printf("%08x %11d", _value, _value);
5024 }
5025
5026 };
5027
5028 class IU_State {
5029 public:
5030 Flag_Register _eflags;
5031 IU_Register _rdi;
5032 IU_Register _rsi;
5033 IU_Register _rbp;
5034 IU_Register _rsp;
5035 IU_Register _rbx;
5036 IU_Register _rdx;
5037 IU_Register _rcx;
5038 IU_Register _rax;
5039
5040 void print() const {
5041 // computation registers
5042 printf("rax, = "); _rax.print(); printf("\n");
5043 printf("rbx, = "); _rbx.print(); printf("\n");
5044 printf("rcx = "); _rcx.print(); printf("\n");
5045 printf("rdx = "); _rdx.print(); printf("\n");
5046 printf("rdi = "); _rdi.print(); printf("\n");
5047 printf("rsi = "); _rsi.print(); printf("\n");
5048 printf("rbp, = "); _rbp.print(); printf("\n");
5049 printf("rsp = "); _rsp.print(); printf("\n");
5050 printf("\n");
5051 // control registers
5052 printf("flgs = "); _eflags.print(); printf("\n");
5053 }
5054 };
5055
5056
5057 class CPU_State {
5058 public:
5059 FPU_State _fpu_state;
5060 IU_State _iu_state;
5061
5062 void print() const {
5063 printf("--------------------------------------------------\n");
5064 _iu_state .print();
5065 printf("\n");
5066 _fpu_state.print();
5067 printf("--------------------------------------------------\n");
5068 }
5069
5070 };
5071
5072
5073 static void _print_CPU_state(CPU_State* state) {
5074 state->print();
5075 };
5076
5077
5078 void MacroAssembler::print_CPU_state() {
5079 push_CPU_state();
5080 push(rsp); // pass CPU state
5081 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _print_CPU_state)));
5082 addptr(rsp, wordSize); // discard argument
5083 pop_CPU_state();
5084 }
5085
5086 void MacroAssembler::restore_cpu_control_state_after_jni(Register rscratch) {
5087 // Either restore the MXCSR register after returning from the JNI Call
5088 // or verify that it wasn't changed (with -Xcheck:jni flag).
5089 if (VM_Version::supports_sse()) {
5090 if (RestoreMXCSROnJNICalls) {
5091 ldmxcsr(ExternalAddress(StubRoutines::x86::addr_mxcsr_std()), rscratch);
5092 } else if (CheckJNICalls) {
5093 call(RuntimeAddress(StubRoutines::x86::verify_mxcsr_entry()));
5094 }
5095 }
5096 // Clear upper bits of YMM registers to avoid SSE <-> AVX transition penalty.
5097 vzeroupper();
5098 }
5099
5100 // ((OopHandle)result).resolve();
5101 void MacroAssembler::resolve_oop_handle(Register result, Register tmp) {
5102 assert_different_registers(result, tmp);
5103
5104 // Only 64 bit platforms support GCs that require a tmp register
5105 // Only IN_HEAP loads require a thread_tmp register
5106 // OopHandle::resolve is an indirection like jobject.
5107 access_load_at(T_OBJECT, IN_NATIVE,
5108 result, Address(result, 0), tmp);
5109 }
5110
5111 // ((WeakHandle)result).resolve();
5112 void MacroAssembler::resolve_weak_handle(Register rresult, Register rtmp) {
5113 assert_different_registers(rresult, rtmp);
5114 Label resolved;
5115
5116 // A null weak handle resolves to null.
5117 cmpptr(rresult, 0);
5118 jcc(Assembler::equal, resolved);
5119
5120 // Only 64 bit platforms support GCs that require a tmp register
5121 // Only IN_HEAP loads require a thread_tmp register
5122 // WeakHandle::resolve is an indirection like jweak.
5123 access_load_at(T_OBJECT, IN_NATIVE | ON_PHANTOM_OOP_REF,
5124 rresult, Address(rresult, 0), rtmp);
5125 bind(resolved);
5126 }
5127
5128 void MacroAssembler::load_mirror(Register mirror, Register method, Register tmp) {
5129 // get mirror
5130 const int mirror_offset = in_bytes(Klass::java_mirror_offset());
5131 load_method_holder(mirror, method);
5132 movptr(mirror, Address(mirror, mirror_offset));
5133 resolve_oop_handle(mirror, tmp);
5134 }
5135
5136 void MacroAssembler::load_method_holder_cld(Register rresult, Register rmethod) {
5137 load_method_holder(rresult, rmethod);
5138 movptr(rresult, Address(rresult, InstanceKlass::class_loader_data_offset()));
5139 }
5140
5141 void MacroAssembler::load_method_holder(Register holder, Register method) {
5142 movptr(holder, Address(method, Method::const_offset())); // ConstMethod*
5143 movptr(holder, Address(holder, ConstMethod::constants_offset())); // ConstantPool*
5144 movptr(holder, Address(holder, ConstantPool::pool_holder_offset())); // InstanceKlass*
5145 }
5146
5147 void MacroAssembler::load_narrow_klass_compact(Register dst, Register src) {
5148 assert(UseCompactObjectHeaders, "expect compact object headers");
5149 movq(dst, Address(src, oopDesc::mark_offset_in_bytes()));
5150 shrq(dst, markWord::klass_shift);
5151 }
5152
5153 void MacroAssembler::load_klass(Register dst, Register src, Register tmp) {
5154 assert_different_registers(src, tmp);
5155 assert_different_registers(dst, tmp);
5156
5157 if (UseCompactObjectHeaders) {
5158 load_narrow_klass_compact(dst, src);
5159 decode_klass_not_null(dst, tmp);
5160 } else if (UseCompressedClassPointers) {
5161 movl(dst, Address(src, oopDesc::klass_offset_in_bytes()));
5162 decode_klass_not_null(dst, tmp);
5163 } else {
5164 movptr(dst, Address(src, oopDesc::klass_offset_in_bytes()));
5165 }
5166 }
5167
5168 void MacroAssembler::store_klass(Register dst, Register src, Register tmp) {
5169 assert(!UseCompactObjectHeaders, "not with compact headers");
5170 assert_different_registers(src, tmp);
5171 assert_different_registers(dst, tmp);
5172 if (UseCompressedClassPointers) {
5173 encode_klass_not_null(src, tmp);
5174 movl(Address(dst, oopDesc::klass_offset_in_bytes()), src);
5175 } else {
5176 movptr(Address(dst, oopDesc::klass_offset_in_bytes()), src);
5177 }
5178 }
5179
5180 void MacroAssembler::cmp_klass(Register klass, Register obj, Register tmp) {
5181 if (UseCompactObjectHeaders) {
5182 assert(tmp != noreg, "need tmp");
5183 assert_different_registers(klass, obj, tmp);
5184 load_narrow_klass_compact(tmp, obj);
5185 cmpl(klass, tmp);
5186 } else if (UseCompressedClassPointers) {
5187 cmpl(klass, Address(obj, oopDesc::klass_offset_in_bytes()));
5188 } else {
5189 cmpptr(klass, Address(obj, oopDesc::klass_offset_in_bytes()));
5190 }
5191 }
5192
5193 void MacroAssembler::cmp_klasses_from_objects(Register obj1, Register obj2, Register tmp1, Register tmp2) {
5194 if (UseCompactObjectHeaders) {
5195 assert(tmp2 != noreg, "need tmp2");
5196 assert_different_registers(obj1, obj2, tmp1, tmp2);
5197 load_narrow_klass_compact(tmp1, obj1);
5198 load_narrow_klass_compact(tmp2, obj2);
5199 cmpl(tmp1, tmp2);
5200 } else if (UseCompressedClassPointers) {
5201 movl(tmp1, Address(obj1, oopDesc::klass_offset_in_bytes()));
5202 cmpl(tmp1, Address(obj2, oopDesc::klass_offset_in_bytes()));
5203 } else {
5204 movptr(tmp1, Address(obj1, oopDesc::klass_offset_in_bytes()));
5205 cmpptr(tmp1, Address(obj2, oopDesc::klass_offset_in_bytes()));
5206 }
5207 }
5208
5209 void MacroAssembler::access_load_at(BasicType type, DecoratorSet decorators, Register dst, Address src,
5210 Register tmp1) {
5211 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
5212 decorators = AccessInternal::decorator_fixup(decorators, type);
5213 bool as_raw = (decorators & AS_RAW) != 0;
5214 if (as_raw) {
5215 bs->BarrierSetAssembler::load_at(this, decorators, type, dst, src, tmp1);
5216 } else {
5217 bs->load_at(this, decorators, type, dst, src, tmp1);
5218 }
5219 }
5220
5221 void MacroAssembler::access_store_at(BasicType type, DecoratorSet decorators, Address dst, Register val,
5222 Register tmp1, Register tmp2, Register tmp3) {
5223 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
5224 decorators = AccessInternal::decorator_fixup(decorators, type);
5225 bool as_raw = (decorators & AS_RAW) != 0;
5226 if (as_raw) {
5227 bs->BarrierSetAssembler::store_at(this, decorators, type, dst, val, tmp1, tmp2, tmp3);
5228 } else {
5229 bs->store_at(this, decorators, type, dst, val, tmp1, tmp2, tmp3);
5230 }
5231 }
5232
5233 void MacroAssembler::load_heap_oop(Register dst, Address src, Register tmp1, DecoratorSet decorators) {
5234 access_load_at(T_OBJECT, IN_HEAP | decorators, dst, src, tmp1);
5235 }
5236
5237 // Doesn't do verification, generates fixed size code
5238 void MacroAssembler::load_heap_oop_not_null(Register dst, Address src, Register tmp1, DecoratorSet decorators) {
5239 access_load_at(T_OBJECT, IN_HEAP | IS_NOT_NULL | decorators, dst, src, tmp1);
5240 }
5241
5242 void MacroAssembler::store_heap_oop(Address dst, Register val, Register tmp1,
5243 Register tmp2, Register tmp3, DecoratorSet decorators) {
5244 access_store_at(T_OBJECT, IN_HEAP | decorators, dst, val, tmp1, tmp2, tmp3);
5245 }
5246
5247 // Used for storing nulls.
5248 void MacroAssembler::store_heap_oop_null(Address dst) {
5249 access_store_at(T_OBJECT, IN_HEAP, dst, noreg, noreg, noreg, noreg);
5250 }
5251
5252 void MacroAssembler::store_klass_gap(Register dst, Register src) {
5253 assert(!UseCompactObjectHeaders, "Don't use with compact headers");
5254 if (UseCompressedClassPointers) {
5255 // Store to klass gap in destination
5256 movl(Address(dst, oopDesc::klass_gap_offset_in_bytes()), src);
5257 }
5258 }
5259
5260 #ifdef ASSERT
5261 void MacroAssembler::verify_heapbase(const char* msg) {
5262 assert (UseCompressedOops, "should be compressed");
5263 assert (Universe::heap() != nullptr, "java heap should be initialized");
5264 if (CheckCompressedOops) {
5265 Label ok;
5266 ExternalAddress src2(CompressedOops::base_addr());
5267 const bool is_src2_reachable = reachable(src2);
5268 if (!is_src2_reachable) {
5269 push(rscratch1); // cmpptr trashes rscratch1
5270 }
5271 cmpptr(r12_heapbase, src2, rscratch1);
5272 jcc(Assembler::equal, ok);
5273 STOP(msg);
5274 bind(ok);
5275 if (!is_src2_reachable) {
5276 pop(rscratch1);
5277 }
5278 }
5279 }
5280 #endif
5281
5282 // Algorithm must match oop.inline.hpp encode_heap_oop.
5283 void MacroAssembler::encode_heap_oop(Register r) {
5284 #ifdef ASSERT
5285 verify_heapbase("MacroAssembler::encode_heap_oop: heap base corrupted?");
5286 #endif
5287 verify_oop_msg(r, "broken oop in encode_heap_oop");
5288 if (CompressedOops::base() == nullptr) {
5289 if (CompressedOops::shift() != 0) {
5290 assert (LogMinObjAlignmentInBytes == CompressedOops::shift(), "decode alg wrong");
5291 shrq(r, LogMinObjAlignmentInBytes);
5292 }
5293 return;
5294 }
5295 testq(r, r);
5296 cmovq(Assembler::equal, r, r12_heapbase);
5297 subq(r, r12_heapbase);
5298 shrq(r, LogMinObjAlignmentInBytes);
5299 }
5300
5301 void MacroAssembler::encode_heap_oop_not_null(Register r) {
5302 #ifdef ASSERT
5303 verify_heapbase("MacroAssembler::encode_heap_oop_not_null: heap base corrupted?");
5304 if (CheckCompressedOops) {
5305 Label ok;
5306 testq(r, r);
5307 jcc(Assembler::notEqual, ok);
5308 STOP("null oop passed to encode_heap_oop_not_null");
5309 bind(ok);
5310 }
5311 #endif
5312 verify_oop_msg(r, "broken oop in encode_heap_oop_not_null");
5313 if (CompressedOops::base() != nullptr) {
5314 subq(r, r12_heapbase);
5315 }
5316 if (CompressedOops::shift() != 0) {
5317 assert (LogMinObjAlignmentInBytes == CompressedOops::shift(), "decode alg wrong");
5318 shrq(r, LogMinObjAlignmentInBytes);
5319 }
5320 }
5321
5322 void MacroAssembler::encode_heap_oop_not_null(Register dst, Register src) {
5323 #ifdef ASSERT
5324 verify_heapbase("MacroAssembler::encode_heap_oop_not_null2: heap base corrupted?");
5325 if (CheckCompressedOops) {
5326 Label ok;
5327 testq(src, src);
5328 jcc(Assembler::notEqual, ok);
5329 STOP("null oop passed to encode_heap_oop_not_null2");
5330 bind(ok);
5331 }
5332 #endif
5333 verify_oop_msg(src, "broken oop in encode_heap_oop_not_null2");
5334 if (dst != src) {
5335 movq(dst, src);
5336 }
5337 if (CompressedOops::base() != nullptr) {
5338 subq(dst, r12_heapbase);
5339 }
5340 if (CompressedOops::shift() != 0) {
5341 assert (LogMinObjAlignmentInBytes == CompressedOops::shift(), "decode alg wrong");
5342 shrq(dst, LogMinObjAlignmentInBytes);
5343 }
5344 }
5345
5346 void MacroAssembler::decode_heap_oop(Register r) {
5347 #ifdef ASSERT
5348 verify_heapbase("MacroAssembler::decode_heap_oop: heap base corrupted?");
5349 #endif
5350 if (CompressedOops::base() == nullptr) {
5351 if (CompressedOops::shift() != 0) {
5352 assert (LogMinObjAlignmentInBytes == CompressedOops::shift(), "decode alg wrong");
5353 shlq(r, LogMinObjAlignmentInBytes);
5354 }
5355 } else {
5356 Label done;
5357 shlq(r, LogMinObjAlignmentInBytes);
5358 jccb(Assembler::equal, done);
5359 addq(r, r12_heapbase);
5360 bind(done);
5361 }
5362 verify_oop_msg(r, "broken oop in decode_heap_oop");
5363 }
5364
5365 void MacroAssembler::decode_heap_oop_not_null(Register r) {
5366 // Note: it will change flags
5367 assert (UseCompressedOops, "should only be used for compressed headers");
5368 assert (Universe::heap() != nullptr, "java heap should be initialized");
5369 // Cannot assert, unverified entry point counts instructions (see .ad file)
5370 // vtableStubs also counts instructions in pd_code_size_limit.
5371 // Also do not verify_oop as this is called by verify_oop.
5372 if (CompressedOops::shift() != 0) {
5373 assert(LogMinObjAlignmentInBytes == CompressedOops::shift(), "decode alg wrong");
5374 shlq(r, LogMinObjAlignmentInBytes);
5375 if (CompressedOops::base() != nullptr) {
5376 addq(r, r12_heapbase);
5377 }
5378 } else {
5379 assert (CompressedOops::base() == nullptr, "sanity");
5380 }
5381 }
5382
5383 void MacroAssembler::decode_heap_oop_not_null(Register dst, Register src) {
5384 // Note: it will change flags
5385 assert (UseCompressedOops, "should only be used for compressed headers");
5386 assert (Universe::heap() != nullptr, "java heap should be initialized");
5387 // Cannot assert, unverified entry point counts instructions (see .ad file)
5388 // vtableStubs also counts instructions in pd_code_size_limit.
5389 // Also do not verify_oop as this is called by verify_oop.
5390 if (CompressedOops::shift() != 0) {
5391 assert(LogMinObjAlignmentInBytes == CompressedOops::shift(), "decode alg wrong");
5392 if (LogMinObjAlignmentInBytes == Address::times_8) {
5393 leaq(dst, Address(r12_heapbase, src, Address::times_8, 0));
5394 } else {
5395 if (dst != src) {
5396 movq(dst, src);
5397 }
5398 shlq(dst, LogMinObjAlignmentInBytes);
5399 if (CompressedOops::base() != nullptr) {
5400 addq(dst, r12_heapbase);
5401 }
5402 }
5403 } else {
5404 assert (CompressedOops::base() == nullptr, "sanity");
5405 if (dst != src) {
5406 movq(dst, src);
5407 }
5408 }
5409 }
5410
5411 void MacroAssembler::encode_klass_not_null(Register r, Register tmp) {
5412 BLOCK_COMMENT("encode_klass_not_null {");
5413 assert_different_registers(r, tmp);
5414 if (CompressedKlassPointers::base() != nullptr) {
5415 if (AOTCodeCache::is_on_for_dump()) {
5416 movptr(tmp, ExternalAddress(CompressedKlassPointers::base_addr()));
5417 } else {
5418 movptr(tmp, (intptr_t)CompressedKlassPointers::base());
5419 }
5420 subq(r, tmp);
5421 }
5422 if (CompressedKlassPointers::shift() != 0) {
5423 shrq(r, CompressedKlassPointers::shift());
5424 }
5425 BLOCK_COMMENT("} encode_klass_not_null");
5426 }
5427
5428 void MacroAssembler::encode_and_move_klass_not_null(Register dst, Register src) {
5429 BLOCK_COMMENT("encode_and_move_klass_not_null {");
5430 assert_different_registers(src, dst);
5431 if (CompressedKlassPointers::base() != nullptr) {
5432 if (AOTCodeCache::is_on_for_dump()) {
5433 movptr(dst, ExternalAddress(CompressedKlassPointers::base_addr()));
5434 negq(dst);
5435 } else {
5436 movptr(dst, -(intptr_t)CompressedKlassPointers::base());
5437 }
5438 addq(dst, src);
5439 } else {
5440 movptr(dst, src);
5441 }
5442 if (CompressedKlassPointers::shift() != 0) {
5443 shrq(dst, CompressedKlassPointers::shift());
5444 }
5445 BLOCK_COMMENT("} encode_and_move_klass_not_null");
5446 }
5447
5448 void MacroAssembler::decode_klass_not_null(Register r, Register tmp) {
5449 BLOCK_COMMENT("decode_klass_not_null {");
5450 assert_different_registers(r, tmp);
5451 // Note: it will change flags
5452 assert(UseCompressedClassPointers, "should only be used for compressed headers");
5453 // Cannot assert, unverified entry point counts instructions (see .ad file)
5454 // vtableStubs also counts instructions in pd_code_size_limit.
5455 // Also do not verify_oop as this is called by verify_oop.
5456 if (CompressedKlassPointers::shift() != 0) {
5457 shlq(r, CompressedKlassPointers::shift());
5458 }
5459 if (CompressedKlassPointers::base() != nullptr) {
5460 if (AOTCodeCache::is_on_for_dump()) {
5461 movptr(tmp, ExternalAddress(CompressedKlassPointers::base_addr()));
5462 } else {
5463 movptr(tmp, (intptr_t)CompressedKlassPointers::base());
5464 }
5465 addq(r, tmp);
5466 }
5467 BLOCK_COMMENT("} decode_klass_not_null");
5468 }
5469
5470 void MacroAssembler::decode_and_move_klass_not_null(Register dst, Register src) {
5471 BLOCK_COMMENT("decode_and_move_klass_not_null {");
5472 assert_different_registers(src, dst);
5473 // Note: it will change flags
5474 assert (UseCompressedClassPointers, "should only be used for compressed headers");
5475 // Cannot assert, unverified entry point counts instructions (see .ad file)
5476 // vtableStubs also counts instructions in pd_code_size_limit.
5477 // Also do not verify_oop as this is called by verify_oop.
5478
5479 if (CompressedKlassPointers::base() == nullptr &&
5480 CompressedKlassPointers::shift() == 0) {
5481 // The best case scenario is that there is no base or shift. Then it is already
5482 // a pointer that needs nothing but a register rename.
5483 movptr(dst, src);
5484 } else {
5485 if (CompressedKlassPointers::shift() <= Address::times_8) {
5486 if (CompressedKlassPointers::base() != nullptr) {
5487 if (AOTCodeCache::is_on_for_dump()) {
5488 movptr(dst, ExternalAddress(CompressedKlassPointers::base_addr()));
5489 } else {
5490 movptr(dst, (intptr_t)CompressedKlassPointers::base());
5491 }
5492 } else {
5493 xorq(dst, dst);
5494 }
5495 if (CompressedKlassPointers::shift() != 0) {
5496 assert(CompressedKlassPointers::shift() == Address::times_8, "klass not aligned on 64bits?");
5497 leaq(dst, Address(dst, src, Address::times_8, 0));
5498 } else {
5499 addq(dst, src);
5500 }
5501 } else {
5502 if (CompressedKlassPointers::base() != nullptr) {
5503 if (AOTCodeCache::is_on_for_dump()) {
5504 movptr(dst, ExternalAddress(CompressedKlassPointers::base_addr()));
5505 shrq(dst, CompressedKlassPointers::shift());
5506 } else {
5507 const intptr_t base_right_shifted =
5508 (intptr_t)CompressedKlassPointers::base() >> CompressedKlassPointers::shift();
5509 movptr(dst, base_right_shifted);
5510 }
5511 } else {
5512 xorq(dst, dst);
5513 }
5514 addq(dst, src);
5515 shlq(dst, CompressedKlassPointers::shift());
5516 }
5517 }
5518 BLOCK_COMMENT("} decode_and_move_klass_not_null");
5519 }
5520
5521 void MacroAssembler::set_narrow_oop(Register dst, jobject obj) {
5522 assert (UseCompressedOops, "should only be used for compressed headers");
5523 assert (Universe::heap() != nullptr, "java heap should be initialized");
5524 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
5525 int oop_index = oop_recorder()->find_index(obj);
5526 RelocationHolder rspec = oop_Relocation::spec(oop_index);
5527 mov_narrow_oop(dst, oop_index, rspec);
5528 }
5529
5530 void MacroAssembler::set_narrow_oop(Address dst, jobject obj) {
5531 assert (UseCompressedOops, "should only be used for compressed headers");
5532 assert (Universe::heap() != nullptr, "java heap should be initialized");
5533 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
5534 int oop_index = oop_recorder()->find_index(obj);
5535 RelocationHolder rspec = oop_Relocation::spec(oop_index);
5536 mov_narrow_oop(dst, oop_index, rspec);
5537 }
5538
5539 void MacroAssembler::set_narrow_klass(Register dst, Klass* k) {
5540 assert (UseCompressedClassPointers, "should only be used for compressed headers");
5541 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
5542 int klass_index = oop_recorder()->find_index(k);
5543 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
5544 mov_narrow_oop(dst, CompressedKlassPointers::encode(k), rspec);
5545 }
5546
5547 void MacroAssembler::set_narrow_klass(Address dst, Klass* k) {
5548 assert (UseCompressedClassPointers, "should only be used for compressed headers");
5549 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
5550 int klass_index = oop_recorder()->find_index(k);
5551 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
5552 mov_narrow_oop(dst, CompressedKlassPointers::encode(k), rspec);
5553 }
5554
5555 void MacroAssembler::cmp_narrow_oop(Register dst, jobject obj) {
5556 assert (UseCompressedOops, "should only be used for compressed headers");
5557 assert (Universe::heap() != nullptr, "java heap should be initialized");
5558 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
5559 int oop_index = oop_recorder()->find_index(obj);
5560 RelocationHolder rspec = oop_Relocation::spec(oop_index);
5561 Assembler::cmp_narrow_oop(dst, oop_index, rspec);
5562 }
5563
5564 void MacroAssembler::cmp_narrow_oop(Address dst, jobject obj) {
5565 assert (UseCompressedOops, "should only be used for compressed headers");
5566 assert (Universe::heap() != nullptr, "java heap should be initialized");
5567 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
5568 int oop_index = oop_recorder()->find_index(obj);
5569 RelocationHolder rspec = oop_Relocation::spec(oop_index);
5570 Assembler::cmp_narrow_oop(dst, oop_index, rspec);
5571 }
5572
5573 void MacroAssembler::cmp_narrow_klass(Register dst, Klass* k) {
5574 assert (UseCompressedClassPointers, "should only be used for compressed headers");
5575 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
5576 int klass_index = oop_recorder()->find_index(k);
5577 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
5578 Assembler::cmp_narrow_oop(dst, CompressedKlassPointers::encode(k), rspec);
5579 }
5580
5581 void MacroAssembler::cmp_narrow_klass(Address dst, Klass* k) {
5582 assert (UseCompressedClassPointers, "should only be used for compressed headers");
5583 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
5584 int klass_index = oop_recorder()->find_index(k);
5585 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
5586 Assembler::cmp_narrow_oop(dst, CompressedKlassPointers::encode(k), rspec);
5587 }
5588
5589 void MacroAssembler::reinit_heapbase() {
5590 if (UseCompressedOops) {
5591 if (Universe::heap() != nullptr) { // GC was initialized
5592 if (CompressedOops::base() == nullptr) {
5593 MacroAssembler::xorptr(r12_heapbase, r12_heapbase);
5594 } else if (AOTCodeCache::is_on_for_dump()) {
5595 movptr(r12_heapbase, ExternalAddress(CompressedOops::base_addr()));
5596 } else {
5597 mov64(r12_heapbase, (int64_t)CompressedOops::base());
5598 }
5599 } else {
5600 movptr(r12_heapbase, ExternalAddress(CompressedOops::base_addr()));
5601 }
5602 }
5603 }
5604
5605 #if COMPILER2_OR_JVMCI
5606
5607 // clear memory of size 'cnt' qwords, starting at 'base' using XMM/YMM/ZMM registers
5608 void MacroAssembler::xmm_clear_mem(Register base, Register cnt, Register rtmp, XMMRegister xtmp, KRegister mask) {
5609 // cnt - number of qwords (8-byte words).
5610 // base - start address, qword aligned.
5611 Label L_zero_64_bytes, L_loop, L_sloop, L_tail, L_end;
5612 bool use64byteVector = (MaxVectorSize == 64) && (VM_Version::avx3_threshold() == 0);
5613 if (use64byteVector) {
5614 vpxor(xtmp, xtmp, xtmp, AVX_512bit);
5615 } else if (MaxVectorSize >= 32) {
5616 vpxor(xtmp, xtmp, xtmp, AVX_256bit);
5617 } else {
5618 pxor(xtmp, xtmp);
5619 }
5620 jmp(L_zero_64_bytes);
5621
5622 BIND(L_loop);
5623 if (MaxVectorSize >= 32) {
5624 fill64(base, 0, xtmp, use64byteVector);
5625 } else {
5626 movdqu(Address(base, 0), xtmp);
5627 movdqu(Address(base, 16), xtmp);
5628 movdqu(Address(base, 32), xtmp);
5629 movdqu(Address(base, 48), xtmp);
5630 }
5631 addptr(base, 64);
5632
5633 BIND(L_zero_64_bytes);
5634 subptr(cnt, 8);
5635 jccb(Assembler::greaterEqual, L_loop);
5636
5637 // Copy trailing 64 bytes
5638 if (use64byteVector) {
5639 addptr(cnt, 8);
5640 jccb(Assembler::equal, L_end);
5641 fill64_masked(3, base, 0, xtmp, mask, cnt, rtmp, true);
5642 jmp(L_end);
5643 } else {
5644 addptr(cnt, 4);
5645 jccb(Assembler::less, L_tail);
5646 if (MaxVectorSize >= 32) {
5647 vmovdqu(Address(base, 0), xtmp);
5648 } else {
5649 movdqu(Address(base, 0), xtmp);
5650 movdqu(Address(base, 16), xtmp);
5651 }
5652 }
5653 addptr(base, 32);
5654 subptr(cnt, 4);
5655
5656 BIND(L_tail);
5657 addptr(cnt, 4);
5658 jccb(Assembler::lessEqual, L_end);
5659 if (UseAVX > 2 && MaxVectorSize >= 32 && VM_Version::supports_avx512vl()) {
5660 fill32_masked(3, base, 0, xtmp, mask, cnt, rtmp);
5661 } else {
5662 decrement(cnt);
5663
5664 BIND(L_sloop);
5665 movq(Address(base, 0), xtmp);
5666 addptr(base, 8);
5667 decrement(cnt);
5668 jccb(Assembler::greaterEqual, L_sloop);
5669 }
5670 BIND(L_end);
5671 }
5672
5673 // Clearing constant sized memory using YMM/ZMM registers.
5674 void MacroAssembler::clear_mem(Register base, int cnt, Register rtmp, XMMRegister xtmp, KRegister mask) {
5675 assert(UseAVX > 2 && VM_Version::supports_avx512vl(), "");
5676 bool use64byteVector = (MaxVectorSize > 32) && (VM_Version::avx3_threshold() == 0);
5677
5678 int vector64_count = (cnt & (~0x7)) >> 3;
5679 cnt = cnt & 0x7;
5680 const int fill64_per_loop = 4;
5681 const int max_unrolled_fill64 = 8;
5682
5683 // 64 byte initialization loop.
5684 vpxor(xtmp, xtmp, xtmp, use64byteVector ? AVX_512bit : AVX_256bit);
5685 int start64 = 0;
5686 if (vector64_count > max_unrolled_fill64) {
5687 Label LOOP;
5688 Register index = rtmp;
5689
5690 start64 = vector64_count - (vector64_count % fill64_per_loop);
5691
5692 movl(index, 0);
5693 BIND(LOOP);
5694 for (int i = 0; i < fill64_per_loop; i++) {
5695 fill64(Address(base, index, Address::times_1, i * 64), xtmp, use64byteVector);
5696 }
5697 addl(index, fill64_per_loop * 64);
5698 cmpl(index, start64 * 64);
5699 jccb(Assembler::less, LOOP);
5700 }
5701 for (int i = start64; i < vector64_count; i++) {
5702 fill64(base, i * 64, xtmp, use64byteVector);
5703 }
5704
5705 // Clear remaining 64 byte tail.
5706 int disp = vector64_count * 64;
5707 if (cnt) {
5708 switch (cnt) {
5709 case 1:
5710 movq(Address(base, disp), xtmp);
5711 break;
5712 case 2:
5713 evmovdqu(T_LONG, k0, Address(base, disp), xtmp, false, Assembler::AVX_128bit);
5714 break;
5715 case 3:
5716 movl(rtmp, 0x7);
5717 kmovwl(mask, rtmp);
5718 evmovdqu(T_LONG, mask, Address(base, disp), xtmp, true, Assembler::AVX_256bit);
5719 break;
5720 case 4:
5721 evmovdqu(T_LONG, k0, Address(base, disp), xtmp, false, Assembler::AVX_256bit);
5722 break;
5723 case 5:
5724 if (use64byteVector) {
5725 movl(rtmp, 0x1F);
5726 kmovwl(mask, rtmp);
5727 evmovdqu(T_LONG, mask, Address(base, disp), xtmp, true, Assembler::AVX_512bit);
5728 } else {
5729 evmovdqu(T_LONG, k0, Address(base, disp), xtmp, false, Assembler::AVX_256bit);
5730 movq(Address(base, disp + 32), xtmp);
5731 }
5732 break;
5733 case 6:
5734 if (use64byteVector) {
5735 movl(rtmp, 0x3F);
5736 kmovwl(mask, rtmp);
5737 evmovdqu(T_LONG, mask, Address(base, disp), xtmp, true, Assembler::AVX_512bit);
5738 } else {
5739 evmovdqu(T_LONG, k0, Address(base, disp), xtmp, false, Assembler::AVX_256bit);
5740 evmovdqu(T_LONG, k0, Address(base, disp + 32), xtmp, false, Assembler::AVX_128bit);
5741 }
5742 break;
5743 case 7:
5744 if (use64byteVector) {
5745 movl(rtmp, 0x7F);
5746 kmovwl(mask, rtmp);
5747 evmovdqu(T_LONG, mask, Address(base, disp), xtmp, true, Assembler::AVX_512bit);
5748 } else {
5749 evmovdqu(T_LONG, k0, Address(base, disp), xtmp, false, Assembler::AVX_256bit);
5750 movl(rtmp, 0x7);
5751 kmovwl(mask, rtmp);
5752 evmovdqu(T_LONG, mask, Address(base, disp + 32), xtmp, true, Assembler::AVX_256bit);
5753 }
5754 break;
5755 default:
5756 fatal("Unexpected length : %d\n",cnt);
5757 break;
5758 }
5759 }
5760 }
5761
5762 void MacroAssembler::clear_mem(Register base, Register cnt, Register tmp, XMMRegister xtmp,
5763 bool is_large, KRegister mask) {
5764 // cnt - number of qwords (8-byte words).
5765 // base - start address, qword aligned.
5766 // is_large - if optimizers know cnt is larger than InitArrayShortSize
5767 assert(base==rdi, "base register must be edi for rep stos");
5768 assert(tmp==rax, "tmp register must be eax for rep stos");
5769 assert(cnt==rcx, "cnt register must be ecx for rep stos");
5770 assert(InitArrayShortSize % BytesPerLong == 0,
5771 "InitArrayShortSize should be the multiple of BytesPerLong");
5772
5773 Label DONE;
5774 if (!is_large || !UseXMMForObjInit) {
5775 xorptr(tmp, tmp);
5776 }
5777
5778 if (!is_large) {
5779 Label LOOP, LONG;
5780 cmpptr(cnt, InitArrayShortSize/BytesPerLong);
5781 jccb(Assembler::greater, LONG);
5782
5783 decrement(cnt);
5784 jccb(Assembler::negative, DONE); // Zero length
5785
5786 // Use individual pointer-sized stores for small counts:
5787 BIND(LOOP);
5788 movptr(Address(base, cnt, Address::times_ptr), tmp);
5789 decrement(cnt);
5790 jccb(Assembler::greaterEqual, LOOP);
5791 jmpb(DONE);
5792
5793 BIND(LONG);
5794 }
5795
5796 // Use longer rep-prefixed ops for non-small counts:
5797 if (UseFastStosb) {
5798 shlptr(cnt, 3); // convert to number of bytes
5799 rep_stosb();
5800 } else if (UseXMMForObjInit) {
5801 xmm_clear_mem(base, cnt, tmp, xtmp, mask);
5802 } else {
5803 rep_stos();
5804 }
5805
5806 BIND(DONE);
5807 }
5808
5809 #endif //COMPILER2_OR_JVMCI
5810
5811
5812 void MacroAssembler::generate_fill(BasicType t, bool aligned,
5813 Register to, Register value, Register count,
5814 Register rtmp, XMMRegister xtmp) {
5815 ShortBranchVerifier sbv(this);
5816 assert_different_registers(to, value, count, rtmp);
5817 Label L_exit;
5818 Label L_fill_2_bytes, L_fill_4_bytes;
5819
5820 #if defined(COMPILER2)
5821 if(MaxVectorSize >=32 &&
5822 VM_Version::supports_avx512vlbw() &&
5823 VM_Version::supports_bmi2()) {
5824 generate_fill_avx3(t, to, value, count, rtmp, xtmp);
5825 return;
5826 }
5827 #endif
5828
5829 int shift = -1;
5830 switch (t) {
5831 case T_BYTE:
5832 shift = 2;
5833 break;
5834 case T_SHORT:
5835 shift = 1;
5836 break;
5837 case T_INT:
5838 shift = 0;
5839 break;
5840 default: ShouldNotReachHere();
5841 }
5842
5843 if (t == T_BYTE) {
5844 andl(value, 0xff);
5845 movl(rtmp, value);
5846 shll(rtmp, 8);
5847 orl(value, rtmp);
5848 }
5849 if (t == T_SHORT) {
5850 andl(value, 0xffff);
5851 }
5852 if (t == T_BYTE || t == T_SHORT) {
5853 movl(rtmp, value);
5854 shll(rtmp, 16);
5855 orl(value, rtmp);
5856 }
5857
5858 cmpptr(count, 8 << shift); // Short arrays (< 32 bytes) fill by element
5859 jcc(Assembler::below, L_fill_4_bytes); // use unsigned cmp
5860 if (!UseUnalignedLoadStores && !aligned && (t == T_BYTE || t == T_SHORT)) {
5861 Label L_skip_align2;
5862 // align source address at 4 bytes address boundary
5863 if (t == T_BYTE) {
5864 Label L_skip_align1;
5865 // One byte misalignment happens only for byte arrays
5866 testptr(to, 1);
5867 jccb(Assembler::zero, L_skip_align1);
5868 movb(Address(to, 0), value);
5869 increment(to);
5870 decrement(count);
5871 BIND(L_skip_align1);
5872 }
5873 // Two bytes misalignment happens only for byte and short (char) arrays
5874 testptr(to, 2);
5875 jccb(Assembler::zero, L_skip_align2);
5876 movw(Address(to, 0), value);
5877 addptr(to, 2);
5878 subptr(count, 1<<(shift-1));
5879 BIND(L_skip_align2);
5880 }
5881 {
5882 Label L_fill_32_bytes;
5883 if (!UseUnalignedLoadStores) {
5884 // align to 8 bytes, we know we are 4 byte aligned to start
5885 testptr(to, 4);
5886 jccb(Assembler::zero, L_fill_32_bytes);
5887 movl(Address(to, 0), value);
5888 addptr(to, 4);
5889 subptr(count, 1<<shift);
5890 }
5891 BIND(L_fill_32_bytes);
5892 {
5893 Label L_fill_32_bytes_loop, L_check_fill_8_bytes, L_fill_8_bytes_loop, L_fill_8_bytes;
5894 movdl(xtmp, value);
5895 if (UseAVX >= 2 && UseUnalignedLoadStores) {
5896 Label L_check_fill_32_bytes;
5897 if (UseAVX > 2) {
5898 // Fill 64-byte chunks
5899 Label L_fill_64_bytes_loop_avx3, L_check_fill_64_bytes_avx2;
5900
5901 // If number of bytes to fill < VM_Version::avx3_threshold(), perform fill using AVX2
5902 cmpptr(count, VM_Version::avx3_threshold());
5903 jccb(Assembler::below, L_check_fill_64_bytes_avx2);
5904
5905 vpbroadcastd(xtmp, xtmp, Assembler::AVX_512bit);
5906
5907 subptr(count, 16 << shift);
5908 jccb(Assembler::less, L_check_fill_32_bytes);
5909 align(16);
5910
5911 BIND(L_fill_64_bytes_loop_avx3);
5912 evmovdqul(Address(to, 0), xtmp, Assembler::AVX_512bit);
5913 addptr(to, 64);
5914 subptr(count, 16 << shift);
5915 jcc(Assembler::greaterEqual, L_fill_64_bytes_loop_avx3);
5916 jmpb(L_check_fill_32_bytes);
5917
5918 BIND(L_check_fill_64_bytes_avx2);
5919 }
5920 // Fill 64-byte chunks
5921 vpbroadcastd(xtmp, xtmp, Assembler::AVX_256bit);
5922
5923 subptr(count, 16 << shift);
5924 jcc(Assembler::less, L_check_fill_32_bytes);
5925
5926 // align data for 64-byte chunks
5927 Label L_fill_64_bytes_loop, L_align_64_bytes_loop;
5928 if (EnableX86ECoreOpts) {
5929 // align 'big' arrays to cache lines to minimize split_stores
5930 cmpptr(count, 96 << shift);
5931 jcc(Assembler::below, L_fill_64_bytes_loop);
5932
5933 // Find the bytes needed for alignment
5934 movptr(rtmp, to);
5935 andptr(rtmp, 0x1c);
5936 jcc(Assembler::zero, L_fill_64_bytes_loop);
5937 negptr(rtmp); // number of bytes to fill 32-rtmp. it filled by 2 mov by 32
5938 addptr(rtmp, 32);
5939 shrptr(rtmp, 2 - shift);// get number of elements from bytes
5940 subptr(count, rtmp); // adjust count by number of elements
5941
5942 align(16);
5943 BIND(L_align_64_bytes_loop);
5944 movdl(Address(to, 0), xtmp);
5945 addptr(to, 4);
5946 subptr(rtmp, 1 << shift);
5947 jcc(Assembler::greater, L_align_64_bytes_loop);
5948 }
5949
5950 align(16);
5951 BIND(L_fill_64_bytes_loop);
5952 vmovdqu(Address(to, 0), xtmp);
5953 vmovdqu(Address(to, 32), xtmp);
5954 addptr(to, 64);
5955 subptr(count, 16 << shift);
5956 jcc(Assembler::greaterEqual, L_fill_64_bytes_loop);
5957
5958 align(16);
5959 BIND(L_check_fill_32_bytes);
5960 addptr(count, 8 << shift);
5961 jccb(Assembler::less, L_check_fill_8_bytes);
5962 vmovdqu(Address(to, 0), xtmp);
5963 addptr(to, 32);
5964 subptr(count, 8 << shift);
5965
5966 BIND(L_check_fill_8_bytes);
5967 // clean upper bits of YMM registers
5968 movdl(xtmp, value);
5969 pshufd(xtmp, xtmp, 0);
5970 } else {
5971 // Fill 32-byte chunks
5972 pshufd(xtmp, xtmp, 0);
5973
5974 subptr(count, 8 << shift);
5975 jcc(Assembler::less, L_check_fill_8_bytes);
5976 align(16);
5977
5978 BIND(L_fill_32_bytes_loop);
5979
5980 if (UseUnalignedLoadStores) {
5981 movdqu(Address(to, 0), xtmp);
5982 movdqu(Address(to, 16), xtmp);
5983 } else {
5984 movq(Address(to, 0), xtmp);
5985 movq(Address(to, 8), xtmp);
5986 movq(Address(to, 16), xtmp);
5987 movq(Address(to, 24), xtmp);
5988 }
5989
5990 addptr(to, 32);
5991 subptr(count, 8 << shift);
5992 jcc(Assembler::greaterEqual, L_fill_32_bytes_loop);
5993
5994 BIND(L_check_fill_8_bytes);
5995 }
5996 addptr(count, 8 << shift);
5997 jccb(Assembler::zero, L_exit);
5998 jmpb(L_fill_8_bytes);
5999
6000 //
6001 // length is too short, just fill qwords
6002 //
6003 align(16);
6004 BIND(L_fill_8_bytes_loop);
6005 movq(Address(to, 0), xtmp);
6006 addptr(to, 8);
6007 BIND(L_fill_8_bytes);
6008 subptr(count, 1 << (shift + 1));
6009 jcc(Assembler::greaterEqual, L_fill_8_bytes_loop);
6010 }
6011 }
6012
6013 Label L_fill_4_bytes_loop;
6014 testl(count, 1 << shift);
6015 jccb(Assembler::zero, L_fill_2_bytes);
6016
6017 align(16);
6018 BIND(L_fill_4_bytes_loop);
6019 movl(Address(to, 0), value);
6020 addptr(to, 4);
6021
6022 BIND(L_fill_4_bytes);
6023 subptr(count, 1 << shift);
6024 jccb(Assembler::greaterEqual, L_fill_4_bytes_loop);
6025
6026 if (t == T_BYTE || t == T_SHORT) {
6027 Label L_fill_byte;
6028 BIND(L_fill_2_bytes);
6029 // fill trailing 2 bytes
6030 testl(count, 1<<(shift-1));
6031 jccb(Assembler::zero, L_fill_byte);
6032 movw(Address(to, 0), value);
6033 if (t == T_BYTE) {
6034 addptr(to, 2);
6035 BIND(L_fill_byte);
6036 // fill trailing byte
6037 testl(count, 1);
6038 jccb(Assembler::zero, L_exit);
6039 movb(Address(to, 0), value);
6040 } else {
6041 BIND(L_fill_byte);
6042 }
6043 } else {
6044 BIND(L_fill_2_bytes);
6045 }
6046 BIND(L_exit);
6047 }
6048
6049 void MacroAssembler::evpbroadcast(BasicType type, XMMRegister dst, Register src, int vector_len) {
6050 switch(type) {
6051 case T_BYTE:
6052 case T_BOOLEAN:
6053 evpbroadcastb(dst, src, vector_len);
6054 break;
6055 case T_SHORT:
6056 case T_CHAR:
6057 evpbroadcastw(dst, src, vector_len);
6058 break;
6059 case T_INT:
6060 case T_FLOAT:
6061 evpbroadcastd(dst, src, vector_len);
6062 break;
6063 case T_LONG:
6064 case T_DOUBLE:
6065 evpbroadcastq(dst, src, vector_len);
6066 break;
6067 default:
6068 fatal("Unhandled type : %s", type2name(type));
6069 break;
6070 }
6071 }
6072
6073 // Encode given char[]/byte[] to byte[] in ISO_8859_1 or ASCII
6074 //
6075 // @IntrinsicCandidate
6076 // int sun.nio.cs.ISO_8859_1.Encoder#encodeISOArray0(
6077 // char[] sa, int sp, byte[] da, int dp, int len) {
6078 // int i = 0;
6079 // for (; i < len; i++) {
6080 // char c = sa[sp++];
6081 // if (c > '\u00FF')
6082 // break;
6083 // da[dp++] = (byte) c;
6084 // }
6085 // return i;
6086 // }
6087 //
6088 // @IntrinsicCandidate
6089 // int java.lang.StringCoding.encodeISOArray0(
6090 // byte[] sa, int sp, byte[] da, int dp, int len) {
6091 // int i = 0;
6092 // for (; i < len; i++) {
6093 // char c = StringUTF16.getChar(sa, sp++);
6094 // if (c > '\u00FF')
6095 // break;
6096 // da[dp++] = (byte) c;
6097 // }
6098 // return i;
6099 // }
6100 //
6101 // @IntrinsicCandidate
6102 // int java.lang.StringCoding.encodeAsciiArray0(
6103 // char[] sa, int sp, byte[] da, int dp, int len) {
6104 // int i = 0;
6105 // for (; i < len; i++) {
6106 // char c = sa[sp++];
6107 // if (c >= '\u0080')
6108 // break;
6109 // da[dp++] = (byte) c;
6110 // }
6111 // return i;
6112 // }
6113 void MacroAssembler::encode_iso_array(Register src, Register dst, Register len,
6114 XMMRegister tmp1Reg, XMMRegister tmp2Reg,
6115 XMMRegister tmp3Reg, XMMRegister tmp4Reg,
6116 Register tmp5, Register result, bool ascii) {
6117
6118 // rsi: src
6119 // rdi: dst
6120 // rdx: len
6121 // rcx: tmp5
6122 // rax: result
6123 ShortBranchVerifier sbv(this);
6124 assert_different_registers(src, dst, len, tmp5, result);
6125 Label L_done, L_copy_1_char, L_copy_1_char_exit;
6126
6127 int mask = ascii ? 0xff80ff80 : 0xff00ff00;
6128 int short_mask = ascii ? 0xff80 : 0xff00;
6129
6130 // set result
6131 xorl(result, result);
6132 // check for zero length
6133 testl(len, len);
6134 jcc(Assembler::zero, L_done);
6135
6136 movl(result, len);
6137
6138 // Setup pointers
6139 lea(src, Address(src, len, Address::times_2)); // char[]
6140 lea(dst, Address(dst, len, Address::times_1)); // byte[]
6141 negptr(len);
6142
6143 if (UseSSE42Intrinsics || UseAVX >= 2) {
6144 Label L_copy_8_chars, L_copy_8_chars_exit;
6145 Label L_chars_16_check, L_copy_16_chars, L_copy_16_chars_exit;
6146
6147 if (UseAVX >= 2) {
6148 Label L_chars_32_check, L_copy_32_chars, L_copy_32_chars_exit;
6149 movl(tmp5, mask); // create mask to test for Unicode or non-ASCII chars in vector
6150 movdl(tmp1Reg, tmp5);
6151 vpbroadcastd(tmp1Reg, tmp1Reg, Assembler::AVX_256bit);
6152 jmp(L_chars_32_check);
6153
6154 bind(L_copy_32_chars);
6155 vmovdqu(tmp3Reg, Address(src, len, Address::times_2, -64));
6156 vmovdqu(tmp4Reg, Address(src, len, Address::times_2, -32));
6157 vpor(tmp2Reg, tmp3Reg, tmp4Reg, /* vector_len */ 1);
6158 vptest(tmp2Reg, tmp1Reg); // check for Unicode or non-ASCII chars in vector
6159 jccb(Assembler::notZero, L_copy_32_chars_exit);
6160 vpackuswb(tmp3Reg, tmp3Reg, tmp4Reg, /* vector_len */ 1);
6161 vpermq(tmp4Reg, tmp3Reg, 0xD8, /* vector_len */ 1);
6162 vmovdqu(Address(dst, len, Address::times_1, -32), tmp4Reg);
6163
6164 bind(L_chars_32_check);
6165 addptr(len, 32);
6166 jcc(Assembler::lessEqual, L_copy_32_chars);
6167
6168 bind(L_copy_32_chars_exit);
6169 subptr(len, 16);
6170 jccb(Assembler::greater, L_copy_16_chars_exit);
6171
6172 } else if (UseSSE42Intrinsics) {
6173 movl(tmp5, mask); // create mask to test for Unicode or non-ASCII chars in vector
6174 movdl(tmp1Reg, tmp5);
6175 pshufd(tmp1Reg, tmp1Reg, 0);
6176 jmpb(L_chars_16_check);
6177 }
6178
6179 bind(L_copy_16_chars);
6180 if (UseAVX >= 2) {
6181 vmovdqu(tmp2Reg, Address(src, len, Address::times_2, -32));
6182 vptest(tmp2Reg, tmp1Reg);
6183 jcc(Assembler::notZero, L_copy_16_chars_exit);
6184 vpackuswb(tmp2Reg, tmp2Reg, tmp1Reg, /* vector_len */ 1);
6185 vpermq(tmp3Reg, tmp2Reg, 0xD8, /* vector_len */ 1);
6186 } else {
6187 if (UseAVX > 0) {
6188 movdqu(tmp3Reg, Address(src, len, Address::times_2, -32));
6189 movdqu(tmp4Reg, Address(src, len, Address::times_2, -16));
6190 vpor(tmp2Reg, tmp3Reg, tmp4Reg, /* vector_len */ 0);
6191 } else {
6192 movdqu(tmp3Reg, Address(src, len, Address::times_2, -32));
6193 por(tmp2Reg, tmp3Reg);
6194 movdqu(tmp4Reg, Address(src, len, Address::times_2, -16));
6195 por(tmp2Reg, tmp4Reg);
6196 }
6197 ptest(tmp2Reg, tmp1Reg); // check for Unicode or non-ASCII chars in vector
6198 jccb(Assembler::notZero, L_copy_16_chars_exit);
6199 packuswb(tmp3Reg, tmp4Reg);
6200 }
6201 movdqu(Address(dst, len, Address::times_1, -16), tmp3Reg);
6202
6203 bind(L_chars_16_check);
6204 addptr(len, 16);
6205 jcc(Assembler::lessEqual, L_copy_16_chars);
6206
6207 bind(L_copy_16_chars_exit);
6208 if (UseAVX >= 2) {
6209 // clean upper bits of YMM registers
6210 vpxor(tmp2Reg, tmp2Reg);
6211 vpxor(tmp3Reg, tmp3Reg);
6212 vpxor(tmp4Reg, tmp4Reg);
6213 movdl(tmp1Reg, tmp5);
6214 pshufd(tmp1Reg, tmp1Reg, 0);
6215 }
6216 subptr(len, 8);
6217 jccb(Assembler::greater, L_copy_8_chars_exit);
6218
6219 bind(L_copy_8_chars);
6220 movdqu(tmp3Reg, Address(src, len, Address::times_2, -16));
6221 ptest(tmp3Reg, tmp1Reg);
6222 jccb(Assembler::notZero, L_copy_8_chars_exit);
6223 packuswb(tmp3Reg, tmp1Reg);
6224 movq(Address(dst, len, Address::times_1, -8), tmp3Reg);
6225 addptr(len, 8);
6226 jccb(Assembler::lessEqual, L_copy_8_chars);
6227
6228 bind(L_copy_8_chars_exit);
6229 subptr(len, 8);
6230 jccb(Assembler::zero, L_done);
6231 }
6232
6233 bind(L_copy_1_char);
6234 load_unsigned_short(tmp5, Address(src, len, Address::times_2, 0));
6235 testl(tmp5, short_mask); // check if Unicode or non-ASCII char
6236 jccb(Assembler::notZero, L_copy_1_char_exit);
6237 movb(Address(dst, len, Address::times_1, 0), tmp5);
6238 addptr(len, 1);
6239 jccb(Assembler::less, L_copy_1_char);
6240
6241 bind(L_copy_1_char_exit);
6242 addptr(result, len); // len is negative count of not processed elements
6243
6244 bind(L_done);
6245 }
6246
6247 /**
6248 * Helper for multiply_to_len().
6249 */
6250 void MacroAssembler::add2_with_carry(Register dest_hi, Register dest_lo, Register src1, Register src2) {
6251 addq(dest_lo, src1);
6252 adcq(dest_hi, 0);
6253 addq(dest_lo, src2);
6254 adcq(dest_hi, 0);
6255 }
6256
6257 /**
6258 * Multiply 64 bit by 64 bit first loop.
6259 */
6260 void MacroAssembler::multiply_64_x_64_loop(Register x, Register xstart, Register x_xstart,
6261 Register y, Register y_idx, Register z,
6262 Register carry, Register product,
6263 Register idx, Register kdx) {
6264 //
6265 // jlong carry, x[], y[], z[];
6266 // for (int idx=ystart, kdx=ystart+1+xstart; idx >= 0; idx-, kdx--) {
6267 // huge_128 product = y[idx] * x[xstart] + carry;
6268 // z[kdx] = (jlong)product;
6269 // carry = (jlong)(product >>> 64);
6270 // }
6271 // z[xstart] = carry;
6272 //
6273
6274 Label L_first_loop, L_first_loop_exit;
6275 Label L_one_x, L_one_y, L_multiply;
6276
6277 decrementl(xstart);
6278 jcc(Assembler::negative, L_one_x);
6279
6280 movq(x_xstart, Address(x, xstart, Address::times_4, 0));
6281 rorq(x_xstart, 32); // convert big-endian to little-endian
6282
6283 bind(L_first_loop);
6284 decrementl(idx);
6285 jcc(Assembler::negative, L_first_loop_exit);
6286 decrementl(idx);
6287 jcc(Assembler::negative, L_one_y);
6288 movq(y_idx, Address(y, idx, Address::times_4, 0));
6289 rorq(y_idx, 32); // convert big-endian to little-endian
6290 bind(L_multiply);
6291 movq(product, x_xstart);
6292 mulq(y_idx); // product(rax) * y_idx -> rdx:rax
6293 addq(product, carry);
6294 adcq(rdx, 0);
6295 subl(kdx, 2);
6296 movl(Address(z, kdx, Address::times_4, 4), product);
6297 shrq(product, 32);
6298 movl(Address(z, kdx, Address::times_4, 0), product);
6299 movq(carry, rdx);
6300 jmp(L_first_loop);
6301
6302 bind(L_one_y);
6303 movl(y_idx, Address(y, 0));
6304 jmp(L_multiply);
6305
6306 bind(L_one_x);
6307 movl(x_xstart, Address(x, 0));
6308 jmp(L_first_loop);
6309
6310 bind(L_first_loop_exit);
6311 }
6312
6313 /**
6314 * Multiply 64 bit by 64 bit and add 128 bit.
6315 */
6316 void MacroAssembler::multiply_add_128_x_128(Register x_xstart, Register y, Register z,
6317 Register yz_idx, Register idx,
6318 Register carry, Register product, int offset) {
6319 // huge_128 product = (y[idx] * x_xstart) + z[kdx] + carry;
6320 // z[kdx] = (jlong)product;
6321
6322 movq(yz_idx, Address(y, idx, Address::times_4, offset));
6323 rorq(yz_idx, 32); // convert big-endian to little-endian
6324 movq(product, x_xstart);
6325 mulq(yz_idx); // product(rax) * yz_idx -> rdx:product(rax)
6326 movq(yz_idx, Address(z, idx, Address::times_4, offset));
6327 rorq(yz_idx, 32); // convert big-endian to little-endian
6328
6329 add2_with_carry(rdx, product, carry, yz_idx);
6330
6331 movl(Address(z, idx, Address::times_4, offset+4), product);
6332 shrq(product, 32);
6333 movl(Address(z, idx, Address::times_4, offset), product);
6334
6335 }
6336
6337 /**
6338 * Multiply 128 bit by 128 bit. Unrolled inner loop.
6339 */
6340 void MacroAssembler::multiply_128_x_128_loop(Register x_xstart, Register y, Register z,
6341 Register yz_idx, Register idx, Register jdx,
6342 Register carry, Register product,
6343 Register carry2) {
6344 // jlong carry, x[], y[], z[];
6345 // int kdx = ystart+1;
6346 // for (int idx=ystart-2; idx >= 0; idx -= 2) { // Third loop
6347 // huge_128 product = (y[idx+1] * x_xstart) + z[kdx+idx+1] + carry;
6348 // z[kdx+idx+1] = (jlong)product;
6349 // jlong carry2 = (jlong)(product >>> 64);
6350 // product = (y[idx] * x_xstart) + z[kdx+idx] + carry2;
6351 // z[kdx+idx] = (jlong)product;
6352 // carry = (jlong)(product >>> 64);
6353 // }
6354 // idx += 2;
6355 // if (idx > 0) {
6356 // product = (y[idx] * x_xstart) + z[kdx+idx] + carry;
6357 // z[kdx+idx] = (jlong)product;
6358 // carry = (jlong)(product >>> 64);
6359 // }
6360 //
6361
6362 Label L_third_loop, L_third_loop_exit, L_post_third_loop_done;
6363
6364 movl(jdx, idx);
6365 andl(jdx, 0xFFFFFFFC);
6366 shrl(jdx, 2);
6367
6368 bind(L_third_loop);
6369 subl(jdx, 1);
6370 jcc(Assembler::negative, L_third_loop_exit);
6371 subl(idx, 4);
6372
6373 multiply_add_128_x_128(x_xstart, y, z, yz_idx, idx, carry, product, 8);
6374 movq(carry2, rdx);
6375
6376 multiply_add_128_x_128(x_xstart, y, z, yz_idx, idx, carry2, product, 0);
6377 movq(carry, rdx);
6378 jmp(L_third_loop);
6379
6380 bind (L_third_loop_exit);
6381
6382 andl (idx, 0x3);
6383 jcc(Assembler::zero, L_post_third_loop_done);
6384
6385 Label L_check_1;
6386 subl(idx, 2);
6387 jcc(Assembler::negative, L_check_1);
6388
6389 multiply_add_128_x_128(x_xstart, y, z, yz_idx, idx, carry, product, 0);
6390 movq(carry, rdx);
6391
6392 bind (L_check_1);
6393 addl (idx, 0x2);
6394 andl (idx, 0x1);
6395 subl(idx, 1);
6396 jcc(Assembler::negative, L_post_third_loop_done);
6397
6398 movl(yz_idx, Address(y, idx, Address::times_4, 0));
6399 movq(product, x_xstart);
6400 mulq(yz_idx); // product(rax) * yz_idx -> rdx:product(rax)
6401 movl(yz_idx, Address(z, idx, Address::times_4, 0));
6402
6403 add2_with_carry(rdx, product, yz_idx, carry);
6404
6405 movl(Address(z, idx, Address::times_4, 0), product);
6406 shrq(product, 32);
6407
6408 shlq(rdx, 32);
6409 orq(product, rdx);
6410 movq(carry, product);
6411
6412 bind(L_post_third_loop_done);
6413 }
6414
6415 /**
6416 * Multiply 128 bit by 128 bit using BMI2. Unrolled inner loop.
6417 *
6418 */
6419 void MacroAssembler::multiply_128_x_128_bmi2_loop(Register y, Register z,
6420 Register carry, Register carry2,
6421 Register idx, Register jdx,
6422 Register yz_idx1, Register yz_idx2,
6423 Register tmp, Register tmp3, Register tmp4) {
6424 assert(UseBMI2Instructions, "should be used only when BMI2 is available");
6425
6426 // jlong carry, x[], y[], z[];
6427 // int kdx = ystart+1;
6428 // for (int idx=ystart-2; idx >= 0; idx -= 2) { // Third loop
6429 // huge_128 tmp3 = (y[idx+1] * rdx) + z[kdx+idx+1] + carry;
6430 // jlong carry2 = (jlong)(tmp3 >>> 64);
6431 // huge_128 tmp4 = (y[idx] * rdx) + z[kdx+idx] + carry2;
6432 // carry = (jlong)(tmp4 >>> 64);
6433 // z[kdx+idx+1] = (jlong)tmp3;
6434 // z[kdx+idx] = (jlong)tmp4;
6435 // }
6436 // idx += 2;
6437 // if (idx > 0) {
6438 // yz_idx1 = (y[idx] * rdx) + z[kdx+idx] + carry;
6439 // z[kdx+idx] = (jlong)yz_idx1;
6440 // carry = (jlong)(yz_idx1 >>> 64);
6441 // }
6442 //
6443
6444 Label L_third_loop, L_third_loop_exit, L_post_third_loop_done;
6445
6446 movl(jdx, idx);
6447 andl(jdx, 0xFFFFFFFC);
6448 shrl(jdx, 2);
6449
6450 bind(L_third_loop);
6451 subl(jdx, 1);
6452 jcc(Assembler::negative, L_third_loop_exit);
6453 subl(idx, 4);
6454
6455 movq(yz_idx1, Address(y, idx, Address::times_4, 8));
6456 rorxq(yz_idx1, yz_idx1, 32); // convert big-endian to little-endian
6457 movq(yz_idx2, Address(y, idx, Address::times_4, 0));
6458 rorxq(yz_idx2, yz_idx2, 32);
6459
6460 mulxq(tmp4, tmp3, yz_idx1); // yz_idx1 * rdx -> tmp4:tmp3
6461 mulxq(carry2, tmp, yz_idx2); // yz_idx2 * rdx -> carry2:tmp
6462
6463 movq(yz_idx1, Address(z, idx, Address::times_4, 8));
6464 rorxq(yz_idx1, yz_idx1, 32);
6465 movq(yz_idx2, Address(z, idx, Address::times_4, 0));
6466 rorxq(yz_idx2, yz_idx2, 32);
6467
6468 if (VM_Version::supports_adx()) {
6469 adcxq(tmp3, carry);
6470 adoxq(tmp3, yz_idx1);
6471
6472 adcxq(tmp4, tmp);
6473 adoxq(tmp4, yz_idx2);
6474
6475 movl(carry, 0); // does not affect flags
6476 adcxq(carry2, carry);
6477 adoxq(carry2, carry);
6478 } else {
6479 add2_with_carry(tmp4, tmp3, carry, yz_idx1);
6480 add2_with_carry(carry2, tmp4, tmp, yz_idx2);
6481 }
6482 movq(carry, carry2);
6483
6484 movl(Address(z, idx, Address::times_4, 12), tmp3);
6485 shrq(tmp3, 32);
6486 movl(Address(z, idx, Address::times_4, 8), tmp3);
6487
6488 movl(Address(z, idx, Address::times_4, 4), tmp4);
6489 shrq(tmp4, 32);
6490 movl(Address(z, idx, Address::times_4, 0), tmp4);
6491
6492 jmp(L_third_loop);
6493
6494 bind (L_third_loop_exit);
6495
6496 andl (idx, 0x3);
6497 jcc(Assembler::zero, L_post_third_loop_done);
6498
6499 Label L_check_1;
6500 subl(idx, 2);
6501 jcc(Assembler::negative, L_check_1);
6502
6503 movq(yz_idx1, Address(y, idx, Address::times_4, 0));
6504 rorxq(yz_idx1, yz_idx1, 32);
6505 mulxq(tmp4, tmp3, yz_idx1); // yz_idx1 * rdx -> tmp4:tmp3
6506 movq(yz_idx2, Address(z, idx, Address::times_4, 0));
6507 rorxq(yz_idx2, yz_idx2, 32);
6508
6509 add2_with_carry(tmp4, tmp3, carry, yz_idx2);
6510
6511 movl(Address(z, idx, Address::times_4, 4), tmp3);
6512 shrq(tmp3, 32);
6513 movl(Address(z, idx, Address::times_4, 0), tmp3);
6514 movq(carry, tmp4);
6515
6516 bind (L_check_1);
6517 addl (idx, 0x2);
6518 andl (idx, 0x1);
6519 subl(idx, 1);
6520 jcc(Assembler::negative, L_post_third_loop_done);
6521 movl(tmp4, Address(y, idx, Address::times_4, 0));
6522 mulxq(carry2, tmp3, tmp4); // tmp4 * rdx -> carry2:tmp3
6523 movl(tmp4, Address(z, idx, Address::times_4, 0));
6524
6525 add2_with_carry(carry2, tmp3, tmp4, carry);
6526
6527 movl(Address(z, idx, Address::times_4, 0), tmp3);
6528 shrq(tmp3, 32);
6529
6530 shlq(carry2, 32);
6531 orq(tmp3, carry2);
6532 movq(carry, tmp3);
6533
6534 bind(L_post_third_loop_done);
6535 }
6536
6537 /**
6538 * Code for BigInteger::multiplyToLen() intrinsic.
6539 *
6540 * rdi: x
6541 * rax: xlen
6542 * rsi: y
6543 * rcx: ylen
6544 * r8: z
6545 * r11: tmp0
6546 * r12: tmp1
6547 * r13: tmp2
6548 * r14: tmp3
6549 * r15: tmp4
6550 * rbx: tmp5
6551 *
6552 */
6553 void MacroAssembler::multiply_to_len(Register x, Register xlen, Register y, Register ylen, Register z, Register tmp0,
6554 Register tmp1, Register tmp2, Register tmp3, Register tmp4, Register tmp5) {
6555 ShortBranchVerifier sbv(this);
6556 assert_different_registers(x, xlen, y, ylen, z, tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, rdx);
6557
6558 push(tmp0);
6559 push(tmp1);
6560 push(tmp2);
6561 push(tmp3);
6562 push(tmp4);
6563 push(tmp5);
6564
6565 push(xlen);
6566
6567 const Register idx = tmp1;
6568 const Register kdx = tmp2;
6569 const Register xstart = tmp3;
6570
6571 const Register y_idx = tmp4;
6572 const Register carry = tmp5;
6573 const Register product = xlen;
6574 const Register x_xstart = tmp0;
6575
6576 // First Loop.
6577 //
6578 // final static long LONG_MASK = 0xffffffffL;
6579 // int xstart = xlen - 1;
6580 // int ystart = ylen - 1;
6581 // long carry = 0;
6582 // for (int idx=ystart, kdx=ystart+1+xstart; idx >= 0; idx-, kdx--) {
6583 // long product = (y[idx] & LONG_MASK) * (x[xstart] & LONG_MASK) + carry;
6584 // z[kdx] = (int)product;
6585 // carry = product >>> 32;
6586 // }
6587 // z[xstart] = (int)carry;
6588 //
6589
6590 movl(idx, ylen); // idx = ylen;
6591 lea(kdx, Address(xlen, ylen)); // kdx = xlen+ylen;
6592 xorq(carry, carry); // carry = 0;
6593
6594 Label L_done;
6595
6596 movl(xstart, xlen);
6597 decrementl(xstart);
6598 jcc(Assembler::negative, L_done);
6599
6600 multiply_64_x_64_loop(x, xstart, x_xstart, y, y_idx, z, carry, product, idx, kdx);
6601
6602 Label L_second_loop;
6603 testl(kdx, kdx);
6604 jcc(Assembler::zero, L_second_loop);
6605
6606 Label L_carry;
6607 subl(kdx, 1);
6608 jcc(Assembler::zero, L_carry);
6609
6610 movl(Address(z, kdx, Address::times_4, 0), carry);
6611 shrq(carry, 32);
6612 subl(kdx, 1);
6613
6614 bind(L_carry);
6615 movl(Address(z, kdx, Address::times_4, 0), carry);
6616
6617 // Second and third (nested) loops.
6618 //
6619 // for (int i = xstart-1; i >= 0; i--) { // Second loop
6620 // carry = 0;
6621 // for (int jdx=ystart, k=ystart+1+i; jdx >= 0; jdx--, k--) { // Third loop
6622 // long product = (y[jdx] & LONG_MASK) * (x[i] & LONG_MASK) +
6623 // (z[k] & LONG_MASK) + carry;
6624 // z[k] = (int)product;
6625 // carry = product >>> 32;
6626 // }
6627 // z[i] = (int)carry;
6628 // }
6629 //
6630 // i = xlen, j = tmp1, k = tmp2, carry = tmp5, x[i] = rdx
6631
6632 const Register jdx = tmp1;
6633
6634 bind(L_second_loop);
6635 xorl(carry, carry); // carry = 0;
6636 movl(jdx, ylen); // j = ystart+1
6637
6638 subl(xstart, 1); // i = xstart-1;
6639 jcc(Assembler::negative, L_done);
6640
6641 push (z);
6642
6643 Label L_last_x;
6644 lea(z, Address(z, xstart, Address::times_4, 4)); // z = z + k - j
6645 subl(xstart, 1); // i = xstart-1;
6646 jcc(Assembler::negative, L_last_x);
6647
6648 if (UseBMI2Instructions) {
6649 movq(rdx, Address(x, xstart, Address::times_4, 0));
6650 rorxq(rdx, rdx, 32); // convert big-endian to little-endian
6651 } else {
6652 movq(x_xstart, Address(x, xstart, Address::times_4, 0));
6653 rorq(x_xstart, 32); // convert big-endian to little-endian
6654 }
6655
6656 Label L_third_loop_prologue;
6657 bind(L_third_loop_prologue);
6658
6659 push (x);
6660 push (xstart);
6661 push (ylen);
6662
6663
6664 if (UseBMI2Instructions) {
6665 multiply_128_x_128_bmi2_loop(y, z, carry, x, jdx, ylen, product, tmp2, x_xstart, tmp3, tmp4);
6666 } else { // !UseBMI2Instructions
6667 multiply_128_x_128_loop(x_xstart, y, z, y_idx, jdx, ylen, carry, product, x);
6668 }
6669
6670 pop(ylen);
6671 pop(xlen);
6672 pop(x);
6673 pop(z);
6674
6675 movl(tmp3, xlen);
6676 addl(tmp3, 1);
6677 movl(Address(z, tmp3, Address::times_4, 0), carry);
6678 subl(tmp3, 1);
6679 jccb(Assembler::negative, L_done);
6680
6681 shrq(carry, 32);
6682 movl(Address(z, tmp3, Address::times_4, 0), carry);
6683 jmp(L_second_loop);
6684
6685 // Next infrequent code is moved outside loops.
6686 bind(L_last_x);
6687 if (UseBMI2Instructions) {
6688 movl(rdx, Address(x, 0));
6689 } else {
6690 movl(x_xstart, Address(x, 0));
6691 }
6692 jmp(L_third_loop_prologue);
6693
6694 bind(L_done);
6695
6696 pop(xlen);
6697
6698 pop(tmp5);
6699 pop(tmp4);
6700 pop(tmp3);
6701 pop(tmp2);
6702 pop(tmp1);
6703 pop(tmp0);
6704 }
6705
6706 void MacroAssembler::vectorized_mismatch(Register obja, Register objb, Register length, Register log2_array_indxscale,
6707 Register result, Register tmp1, Register tmp2, XMMRegister rymm0, XMMRegister rymm1, XMMRegister rymm2){
6708 assert(UseSSE42Intrinsics, "SSE4.2 must be enabled.");
6709 Label VECTOR16_LOOP, VECTOR8_LOOP, VECTOR4_LOOP;
6710 Label VECTOR8_TAIL, VECTOR4_TAIL;
6711 Label VECTOR32_NOT_EQUAL, VECTOR16_NOT_EQUAL, VECTOR8_NOT_EQUAL, VECTOR4_NOT_EQUAL;
6712 Label SAME_TILL_END, DONE;
6713 Label BYTES_LOOP, BYTES_TAIL, BYTES_NOT_EQUAL;
6714
6715 //scale is in rcx in both Win64 and Unix
6716 ShortBranchVerifier sbv(this);
6717
6718 shlq(length);
6719 xorq(result, result);
6720
6721 if ((AVX3Threshold == 0) && (UseAVX > 2) &&
6722 VM_Version::supports_avx512vlbw()) {
6723 Label VECTOR64_LOOP, VECTOR64_NOT_EQUAL, VECTOR32_TAIL;
6724
6725 cmpq(length, 64);
6726 jcc(Assembler::less, VECTOR32_TAIL);
6727
6728 movq(tmp1, length);
6729 andq(tmp1, 0x3F); // tail count
6730 andq(length, ~(0x3F)); //vector count
6731
6732 bind(VECTOR64_LOOP);
6733 // AVX512 code to compare 64 byte vectors.
6734 evmovdqub(rymm0, Address(obja, result), Assembler::AVX_512bit);
6735 evpcmpeqb(k7, rymm0, Address(objb, result), Assembler::AVX_512bit);
6736 kortestql(k7, k7);
6737 jcc(Assembler::aboveEqual, VECTOR64_NOT_EQUAL); // mismatch
6738 addq(result, 64);
6739 subq(length, 64);
6740 jccb(Assembler::notZero, VECTOR64_LOOP);
6741
6742 //bind(VECTOR64_TAIL);
6743 testq(tmp1, tmp1);
6744 jcc(Assembler::zero, SAME_TILL_END);
6745
6746 //bind(VECTOR64_TAIL);
6747 // AVX512 code to compare up to 63 byte vectors.
6748 mov64(tmp2, 0xFFFFFFFFFFFFFFFF);
6749 shlxq(tmp2, tmp2, tmp1);
6750 notq(tmp2);
6751 kmovql(k3, tmp2);
6752
6753 evmovdqub(rymm0, k3, Address(obja, result), false, Assembler::AVX_512bit);
6754 evpcmpeqb(k7, k3, rymm0, Address(objb, result), Assembler::AVX_512bit);
6755
6756 ktestql(k7, k3);
6757 jcc(Assembler::below, SAME_TILL_END); // not mismatch
6758
6759 bind(VECTOR64_NOT_EQUAL);
6760 kmovql(tmp1, k7);
6761 notq(tmp1);
6762 tzcntq(tmp1, tmp1);
6763 addq(result, tmp1);
6764 shrq(result);
6765 jmp(DONE);
6766 bind(VECTOR32_TAIL);
6767 }
6768
6769 cmpq(length, 8);
6770 jcc(Assembler::equal, VECTOR8_LOOP);
6771 jcc(Assembler::less, VECTOR4_TAIL);
6772
6773 if (UseAVX >= 2) {
6774 Label VECTOR16_TAIL, VECTOR32_LOOP;
6775
6776 cmpq(length, 16);
6777 jcc(Assembler::equal, VECTOR16_LOOP);
6778 jcc(Assembler::less, VECTOR8_LOOP);
6779
6780 cmpq(length, 32);
6781 jccb(Assembler::less, VECTOR16_TAIL);
6782
6783 subq(length, 32);
6784 bind(VECTOR32_LOOP);
6785 vmovdqu(rymm0, Address(obja, result));
6786 vmovdqu(rymm1, Address(objb, result));
6787 vpxor(rymm2, rymm0, rymm1, Assembler::AVX_256bit);
6788 vptest(rymm2, rymm2);
6789 jcc(Assembler::notZero, VECTOR32_NOT_EQUAL);//mismatch found
6790 addq(result, 32);
6791 subq(length, 32);
6792 jcc(Assembler::greaterEqual, VECTOR32_LOOP);
6793 addq(length, 32);
6794 jcc(Assembler::equal, SAME_TILL_END);
6795 //falling through if less than 32 bytes left //close the branch here.
6796
6797 bind(VECTOR16_TAIL);
6798 cmpq(length, 16);
6799 jccb(Assembler::less, VECTOR8_TAIL);
6800 bind(VECTOR16_LOOP);
6801 movdqu(rymm0, Address(obja, result));
6802 movdqu(rymm1, Address(objb, result));
6803 vpxor(rymm2, rymm0, rymm1, Assembler::AVX_128bit);
6804 ptest(rymm2, rymm2);
6805 jcc(Assembler::notZero, VECTOR16_NOT_EQUAL);//mismatch found
6806 addq(result, 16);
6807 subq(length, 16);
6808 jcc(Assembler::equal, SAME_TILL_END);
6809 //falling through if less than 16 bytes left
6810 } else {//regular intrinsics
6811
6812 cmpq(length, 16);
6813 jccb(Assembler::less, VECTOR8_TAIL);
6814
6815 subq(length, 16);
6816 bind(VECTOR16_LOOP);
6817 movdqu(rymm0, Address(obja, result));
6818 movdqu(rymm1, Address(objb, result));
6819 pxor(rymm0, rymm1);
6820 ptest(rymm0, rymm0);
6821 jcc(Assembler::notZero, VECTOR16_NOT_EQUAL);//mismatch found
6822 addq(result, 16);
6823 subq(length, 16);
6824 jccb(Assembler::greaterEqual, VECTOR16_LOOP);
6825 addq(length, 16);
6826 jcc(Assembler::equal, SAME_TILL_END);
6827 //falling through if less than 16 bytes left
6828 }
6829
6830 bind(VECTOR8_TAIL);
6831 cmpq(length, 8);
6832 jccb(Assembler::less, VECTOR4_TAIL);
6833 bind(VECTOR8_LOOP);
6834 movq(tmp1, Address(obja, result));
6835 movq(tmp2, Address(objb, result));
6836 xorq(tmp1, tmp2);
6837 testq(tmp1, tmp1);
6838 jcc(Assembler::notZero, VECTOR8_NOT_EQUAL);//mismatch found
6839 addq(result, 8);
6840 subq(length, 8);
6841 jcc(Assembler::equal, SAME_TILL_END);
6842 //falling through if less than 8 bytes left
6843
6844 bind(VECTOR4_TAIL);
6845 cmpq(length, 4);
6846 jccb(Assembler::less, BYTES_TAIL);
6847 bind(VECTOR4_LOOP);
6848 movl(tmp1, Address(obja, result));
6849 xorl(tmp1, Address(objb, result));
6850 testl(tmp1, tmp1);
6851 jcc(Assembler::notZero, VECTOR4_NOT_EQUAL);//mismatch found
6852 addq(result, 4);
6853 subq(length, 4);
6854 jcc(Assembler::equal, SAME_TILL_END);
6855 //falling through if less than 4 bytes left
6856
6857 bind(BYTES_TAIL);
6858 bind(BYTES_LOOP);
6859 load_unsigned_byte(tmp1, Address(obja, result));
6860 load_unsigned_byte(tmp2, Address(objb, result));
6861 xorl(tmp1, tmp2);
6862 testl(tmp1, tmp1);
6863 jcc(Assembler::notZero, BYTES_NOT_EQUAL);//mismatch found
6864 decq(length);
6865 jcc(Assembler::zero, SAME_TILL_END);
6866 incq(result);
6867 load_unsigned_byte(tmp1, Address(obja, result));
6868 load_unsigned_byte(tmp2, Address(objb, result));
6869 xorl(tmp1, tmp2);
6870 testl(tmp1, tmp1);
6871 jcc(Assembler::notZero, BYTES_NOT_EQUAL);//mismatch found
6872 decq(length);
6873 jcc(Assembler::zero, SAME_TILL_END);
6874 incq(result);
6875 load_unsigned_byte(tmp1, Address(obja, result));
6876 load_unsigned_byte(tmp2, Address(objb, result));
6877 xorl(tmp1, tmp2);
6878 testl(tmp1, tmp1);
6879 jcc(Assembler::notZero, BYTES_NOT_EQUAL);//mismatch found
6880 jmp(SAME_TILL_END);
6881
6882 if (UseAVX >= 2) {
6883 bind(VECTOR32_NOT_EQUAL);
6884 vpcmpeqb(rymm2, rymm2, rymm2, Assembler::AVX_256bit);
6885 vpcmpeqb(rymm0, rymm0, rymm1, Assembler::AVX_256bit);
6886 vpxor(rymm0, rymm0, rymm2, Assembler::AVX_256bit);
6887 vpmovmskb(tmp1, rymm0);
6888 bsfq(tmp1, tmp1);
6889 addq(result, tmp1);
6890 shrq(result);
6891 jmp(DONE);
6892 }
6893
6894 bind(VECTOR16_NOT_EQUAL);
6895 if (UseAVX >= 2) {
6896 vpcmpeqb(rymm2, rymm2, rymm2, Assembler::AVX_128bit);
6897 vpcmpeqb(rymm0, rymm0, rymm1, Assembler::AVX_128bit);
6898 pxor(rymm0, rymm2);
6899 } else {
6900 pcmpeqb(rymm2, rymm2);
6901 pxor(rymm0, rymm1);
6902 pcmpeqb(rymm0, rymm1);
6903 pxor(rymm0, rymm2);
6904 }
6905 pmovmskb(tmp1, rymm0);
6906 bsfq(tmp1, tmp1);
6907 addq(result, tmp1);
6908 shrq(result);
6909 jmpb(DONE);
6910
6911 bind(VECTOR8_NOT_EQUAL);
6912 bind(VECTOR4_NOT_EQUAL);
6913 bsfq(tmp1, tmp1);
6914 shrq(tmp1, 3);
6915 addq(result, tmp1);
6916 bind(BYTES_NOT_EQUAL);
6917 shrq(result);
6918 jmpb(DONE);
6919
6920 bind(SAME_TILL_END);
6921 mov64(result, -1);
6922
6923 bind(DONE);
6924 }
6925
6926 //Helper functions for square_to_len()
6927
6928 /**
6929 * Store the squares of x[], right shifted one bit (divided by 2) into z[]
6930 * Preserves x and z and modifies rest of the registers.
6931 */
6932 void MacroAssembler::square_rshift(Register x, Register xlen, Register z, Register tmp1, Register tmp3, Register tmp4, Register tmp5, Register rdxReg, Register raxReg) {
6933 // Perform square and right shift by 1
6934 // Handle odd xlen case first, then for even xlen do the following
6935 // jlong carry = 0;
6936 // for (int j=0, i=0; j < xlen; j+=2, i+=4) {
6937 // huge_128 product = x[j:j+1] * x[j:j+1];
6938 // z[i:i+1] = (carry << 63) | (jlong)(product >>> 65);
6939 // z[i+2:i+3] = (jlong)(product >>> 1);
6940 // carry = (jlong)product;
6941 // }
6942
6943 xorq(tmp5, tmp5); // carry
6944 xorq(rdxReg, rdxReg);
6945 xorl(tmp1, tmp1); // index for x
6946 xorl(tmp4, tmp4); // index for z
6947
6948 Label L_first_loop, L_first_loop_exit;
6949
6950 testl(xlen, 1);
6951 jccb(Assembler::zero, L_first_loop); //jump if xlen is even
6952
6953 // Square and right shift by 1 the odd element using 32 bit multiply
6954 movl(raxReg, Address(x, tmp1, Address::times_4, 0));
6955 imulq(raxReg, raxReg);
6956 shrq(raxReg, 1);
6957 adcq(tmp5, 0);
6958 movq(Address(z, tmp4, Address::times_4, 0), raxReg);
6959 incrementl(tmp1);
6960 addl(tmp4, 2);
6961
6962 // Square and right shift by 1 the rest using 64 bit multiply
6963 bind(L_first_loop);
6964 cmpptr(tmp1, xlen);
6965 jccb(Assembler::equal, L_first_loop_exit);
6966
6967 // Square
6968 movq(raxReg, Address(x, tmp1, Address::times_4, 0));
6969 rorq(raxReg, 32); // convert big-endian to little-endian
6970 mulq(raxReg); // 64-bit multiply rax * rax -> rdx:rax
6971
6972 // Right shift by 1 and save carry
6973 shrq(tmp5, 1); // rdx:rax:tmp5 = (tmp5:rdx:rax) >>> 1
6974 rcrq(rdxReg, 1);
6975 rcrq(raxReg, 1);
6976 adcq(tmp5, 0);
6977
6978 // Store result in z
6979 movq(Address(z, tmp4, Address::times_4, 0), rdxReg);
6980 movq(Address(z, tmp4, Address::times_4, 8), raxReg);
6981
6982 // Update indices for x and z
6983 addl(tmp1, 2);
6984 addl(tmp4, 4);
6985 jmp(L_first_loop);
6986
6987 bind(L_first_loop_exit);
6988 }
6989
6990
6991 /**
6992 * Perform the following multiply add operation using BMI2 instructions
6993 * carry:sum = sum + op1*op2 + carry
6994 * op2 should be in rdx
6995 * op2 is preserved, all other registers are modified
6996 */
6997 void MacroAssembler::multiply_add_64_bmi2(Register sum, Register op1, Register op2, Register carry, Register tmp2) {
6998 // assert op2 is rdx
6999 mulxq(tmp2, op1, op1); // op1 * op2 -> tmp2:op1
7000 addq(sum, carry);
7001 adcq(tmp2, 0);
7002 addq(sum, op1);
7003 adcq(tmp2, 0);
7004 movq(carry, tmp2);
7005 }
7006
7007 /**
7008 * Perform the following multiply add operation:
7009 * carry:sum = sum + op1*op2 + carry
7010 * Preserves op1, op2 and modifies rest of registers
7011 */
7012 void MacroAssembler::multiply_add_64(Register sum, Register op1, Register op2, Register carry, Register rdxReg, Register raxReg) {
7013 // rdx:rax = op1 * op2
7014 movq(raxReg, op2);
7015 mulq(op1);
7016
7017 // rdx:rax = sum + carry + rdx:rax
7018 addq(sum, carry);
7019 adcq(rdxReg, 0);
7020 addq(sum, raxReg);
7021 adcq(rdxReg, 0);
7022
7023 // carry:sum = rdx:sum
7024 movq(carry, rdxReg);
7025 }
7026
7027 /**
7028 * Add 64 bit long carry into z[] with carry propagation.
7029 * Preserves z and carry register values and modifies rest of registers.
7030 *
7031 */
7032 void MacroAssembler::add_one_64(Register z, Register zlen, Register carry, Register tmp1) {
7033 Label L_fourth_loop, L_fourth_loop_exit;
7034
7035 movl(tmp1, 1);
7036 subl(zlen, 2);
7037 addq(Address(z, zlen, Address::times_4, 0), carry);
7038
7039 bind(L_fourth_loop);
7040 jccb(Assembler::carryClear, L_fourth_loop_exit);
7041 subl(zlen, 2);
7042 jccb(Assembler::negative, L_fourth_loop_exit);
7043 addq(Address(z, zlen, Address::times_4, 0), tmp1);
7044 jmp(L_fourth_loop);
7045 bind(L_fourth_loop_exit);
7046 }
7047
7048 /**
7049 * Shift z[] left by 1 bit.
7050 * Preserves x, len, z and zlen registers and modifies rest of the registers.
7051 *
7052 */
7053 void MacroAssembler::lshift_by_1(Register x, Register len, Register z, Register zlen, Register tmp1, Register tmp2, Register tmp3, Register tmp4) {
7054
7055 Label L_fifth_loop, L_fifth_loop_exit;
7056
7057 // Fifth loop
7058 // Perform primitiveLeftShift(z, zlen, 1)
7059
7060 const Register prev_carry = tmp1;
7061 const Register new_carry = tmp4;
7062 const Register value = tmp2;
7063 const Register zidx = tmp3;
7064
7065 // int zidx, carry;
7066 // long value;
7067 // carry = 0;
7068 // for (zidx = zlen-2; zidx >=0; zidx -= 2) {
7069 // (carry:value) = (z[i] << 1) | carry ;
7070 // z[i] = value;
7071 // }
7072
7073 movl(zidx, zlen);
7074 xorl(prev_carry, prev_carry); // clear carry flag and prev_carry register
7075
7076 bind(L_fifth_loop);
7077 decl(zidx); // Use decl to preserve carry flag
7078 decl(zidx);
7079 jccb(Assembler::negative, L_fifth_loop_exit);
7080
7081 if (UseBMI2Instructions) {
7082 movq(value, Address(z, zidx, Address::times_4, 0));
7083 rclq(value, 1);
7084 rorxq(value, value, 32);
7085 movq(Address(z, zidx, Address::times_4, 0), value); // Store back in big endian form
7086 }
7087 else {
7088 // clear new_carry
7089 xorl(new_carry, new_carry);
7090
7091 // Shift z[i] by 1, or in previous carry and save new carry
7092 movq(value, Address(z, zidx, Address::times_4, 0));
7093 shlq(value, 1);
7094 adcl(new_carry, 0);
7095
7096 orq(value, prev_carry);
7097 rorq(value, 0x20);
7098 movq(Address(z, zidx, Address::times_4, 0), value); // Store back in big endian form
7099
7100 // Set previous carry = new carry
7101 movl(prev_carry, new_carry);
7102 }
7103 jmp(L_fifth_loop);
7104
7105 bind(L_fifth_loop_exit);
7106 }
7107
7108
7109 /**
7110 * Code for BigInteger::squareToLen() intrinsic
7111 *
7112 * rdi: x
7113 * rsi: len
7114 * r8: z
7115 * rcx: zlen
7116 * r12: tmp1
7117 * r13: tmp2
7118 * r14: tmp3
7119 * r15: tmp4
7120 * rbx: tmp5
7121 *
7122 */
7123 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) {
7124
7125 Label L_second_loop, L_second_loop_exit, L_third_loop, L_third_loop_exit, L_last_x, L_multiply;
7126 push(tmp1);
7127 push(tmp2);
7128 push(tmp3);
7129 push(tmp4);
7130 push(tmp5);
7131
7132 // First loop
7133 // Store the squares, right shifted one bit (i.e., divided by 2).
7134 square_rshift(x, len, z, tmp1, tmp3, tmp4, tmp5, rdxReg, raxReg);
7135
7136 // Add in off-diagonal sums.
7137 //
7138 // Second, third (nested) and fourth loops.
7139 // zlen +=2;
7140 // for (int xidx=len-2,zidx=zlen-4; xidx > 0; xidx-=2,zidx-=4) {
7141 // carry = 0;
7142 // long op2 = x[xidx:xidx+1];
7143 // for (int j=xidx-2,k=zidx; j >= 0; j-=2) {
7144 // k -= 2;
7145 // long op1 = x[j:j+1];
7146 // long sum = z[k:k+1];
7147 // carry:sum = multiply_add_64(sum, op1, op2, carry, tmp_regs);
7148 // z[k:k+1] = sum;
7149 // }
7150 // add_one_64(z, k, carry, tmp_regs);
7151 // }
7152
7153 const Register carry = tmp5;
7154 const Register sum = tmp3;
7155 const Register op1 = tmp4;
7156 Register op2 = tmp2;
7157
7158 push(zlen);
7159 push(len);
7160 addl(zlen,2);
7161 bind(L_second_loop);
7162 xorq(carry, carry);
7163 subl(zlen, 4);
7164 subl(len, 2);
7165 push(zlen);
7166 push(len);
7167 cmpl(len, 0);
7168 jccb(Assembler::lessEqual, L_second_loop_exit);
7169
7170 // Multiply an array by one 64 bit long.
7171 if (UseBMI2Instructions) {
7172 op2 = rdxReg;
7173 movq(op2, Address(x, len, Address::times_4, 0));
7174 rorxq(op2, op2, 32);
7175 }
7176 else {
7177 movq(op2, Address(x, len, Address::times_4, 0));
7178 rorq(op2, 32);
7179 }
7180
7181 bind(L_third_loop);
7182 decrementl(len);
7183 jccb(Assembler::negative, L_third_loop_exit);
7184 decrementl(len);
7185 jccb(Assembler::negative, L_last_x);
7186
7187 movq(op1, Address(x, len, Address::times_4, 0));
7188 rorq(op1, 32);
7189
7190 bind(L_multiply);
7191 subl(zlen, 2);
7192 movq(sum, Address(z, zlen, Address::times_4, 0));
7193
7194 // Multiply 64 bit by 64 bit and add 64 bits lower half and upper 64 bits as carry.
7195 if (UseBMI2Instructions) {
7196 multiply_add_64_bmi2(sum, op1, op2, carry, tmp2);
7197 }
7198 else {
7199 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg);
7200 }
7201
7202 movq(Address(z, zlen, Address::times_4, 0), sum);
7203
7204 jmp(L_third_loop);
7205 bind(L_third_loop_exit);
7206
7207 // Fourth loop
7208 // Add 64 bit long carry into z with carry propagation.
7209 // Uses offsetted zlen.
7210 add_one_64(z, zlen, carry, tmp1);
7211
7212 pop(len);
7213 pop(zlen);
7214 jmp(L_second_loop);
7215
7216 // Next infrequent code is moved outside loops.
7217 bind(L_last_x);
7218 movl(op1, Address(x, 0));
7219 jmp(L_multiply);
7220
7221 bind(L_second_loop_exit);
7222 pop(len);
7223 pop(zlen);
7224 pop(len);
7225 pop(zlen);
7226
7227 // Fifth loop
7228 // Shift z left 1 bit.
7229 lshift_by_1(x, len, z, zlen, tmp1, tmp2, tmp3, tmp4);
7230
7231 // z[zlen-1] |= x[len-1] & 1;
7232 movl(tmp3, Address(x, len, Address::times_4, -4));
7233 andl(tmp3, 1);
7234 orl(Address(z, zlen, Address::times_4, -4), tmp3);
7235
7236 pop(tmp5);
7237 pop(tmp4);
7238 pop(tmp3);
7239 pop(tmp2);
7240 pop(tmp1);
7241 }
7242
7243 /**
7244 * Helper function for mul_add()
7245 * Multiply the in[] by int k and add to out[] starting at offset offs using
7246 * 128 bit by 32 bit multiply and return the carry in tmp5.
7247 * Only quad int aligned length of in[] is operated on in this function.
7248 * k is in rdxReg for BMI2Instructions, for others it is in tmp2.
7249 * This function preserves out, in and k registers.
7250 * len and offset point to the appropriate index in "in" & "out" correspondingly
7251 * tmp5 has the carry.
7252 * other registers are temporary and are modified.
7253 *
7254 */
7255 void MacroAssembler::mul_add_128_x_32_loop(Register out, Register in,
7256 Register offset, Register len, Register tmp1, Register tmp2, Register tmp3,
7257 Register tmp4, Register tmp5, Register rdxReg, Register raxReg) {
7258
7259 Label L_first_loop, L_first_loop_exit;
7260
7261 movl(tmp1, len);
7262 shrl(tmp1, 2);
7263
7264 bind(L_first_loop);
7265 subl(tmp1, 1);
7266 jccb(Assembler::negative, L_first_loop_exit);
7267
7268 subl(len, 4);
7269 subl(offset, 4);
7270
7271 Register op2 = tmp2;
7272 const Register sum = tmp3;
7273 const Register op1 = tmp4;
7274 const Register carry = tmp5;
7275
7276 if (UseBMI2Instructions) {
7277 op2 = rdxReg;
7278 }
7279
7280 movq(op1, Address(in, len, Address::times_4, 8));
7281 rorq(op1, 32);
7282 movq(sum, Address(out, offset, Address::times_4, 8));
7283 rorq(sum, 32);
7284 if (UseBMI2Instructions) {
7285 multiply_add_64_bmi2(sum, op1, op2, carry, raxReg);
7286 }
7287 else {
7288 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg);
7289 }
7290 // Store back in big endian from little endian
7291 rorq(sum, 0x20);
7292 movq(Address(out, offset, Address::times_4, 8), sum);
7293
7294 movq(op1, Address(in, len, Address::times_4, 0));
7295 rorq(op1, 32);
7296 movq(sum, Address(out, offset, Address::times_4, 0));
7297 rorq(sum, 32);
7298 if (UseBMI2Instructions) {
7299 multiply_add_64_bmi2(sum, op1, op2, carry, raxReg);
7300 }
7301 else {
7302 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg);
7303 }
7304 // Store back in big endian from little endian
7305 rorq(sum, 0x20);
7306 movq(Address(out, offset, Address::times_4, 0), sum);
7307
7308 jmp(L_first_loop);
7309 bind(L_first_loop_exit);
7310 }
7311
7312 /**
7313 * Code for BigInteger::mulAdd() intrinsic
7314 *
7315 * rdi: out
7316 * rsi: in
7317 * r11: offs (out.length - offset)
7318 * rcx: len
7319 * r8: k
7320 * r12: tmp1
7321 * r13: tmp2
7322 * r14: tmp3
7323 * r15: tmp4
7324 * rbx: tmp5
7325 * Multiply the in[] by word k and add to out[], return the carry in rax
7326 */
7327 void MacroAssembler::mul_add(Register out, Register in, Register offs,
7328 Register len, Register k, Register tmp1, Register tmp2, Register tmp3,
7329 Register tmp4, Register tmp5, Register rdxReg, Register raxReg) {
7330
7331 Label L_carry, L_last_in, L_done;
7332
7333 // carry = 0;
7334 // for (int j=len-1; j >= 0; j--) {
7335 // long product = (in[j] & LONG_MASK) * kLong +
7336 // (out[offs] & LONG_MASK) + carry;
7337 // out[offs--] = (int)product;
7338 // carry = product >>> 32;
7339 // }
7340 //
7341 push(tmp1);
7342 push(tmp2);
7343 push(tmp3);
7344 push(tmp4);
7345 push(tmp5);
7346
7347 Register op2 = tmp2;
7348 const Register sum = tmp3;
7349 const Register op1 = tmp4;
7350 const Register carry = tmp5;
7351
7352 if (UseBMI2Instructions) {
7353 op2 = rdxReg;
7354 movl(op2, k);
7355 }
7356 else {
7357 movl(op2, k);
7358 }
7359
7360 xorq(carry, carry);
7361
7362 //First loop
7363
7364 //Multiply in[] by k in a 4 way unrolled loop using 128 bit by 32 bit multiply
7365 //The carry is in tmp5
7366 mul_add_128_x_32_loop(out, in, offs, len, tmp1, tmp2, tmp3, tmp4, tmp5, rdxReg, raxReg);
7367
7368 //Multiply the trailing in[] entry using 64 bit by 32 bit, if any
7369 decrementl(len);
7370 jccb(Assembler::negative, L_carry);
7371 decrementl(len);
7372 jccb(Assembler::negative, L_last_in);
7373
7374 movq(op1, Address(in, len, Address::times_4, 0));
7375 rorq(op1, 32);
7376
7377 subl(offs, 2);
7378 movq(sum, Address(out, offs, Address::times_4, 0));
7379 rorq(sum, 32);
7380
7381 if (UseBMI2Instructions) {
7382 multiply_add_64_bmi2(sum, op1, op2, carry, raxReg);
7383 }
7384 else {
7385 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg);
7386 }
7387
7388 // Store back in big endian from little endian
7389 rorq(sum, 0x20);
7390 movq(Address(out, offs, Address::times_4, 0), sum);
7391
7392 testl(len, len);
7393 jccb(Assembler::zero, L_carry);
7394
7395 //Multiply the last in[] entry, if any
7396 bind(L_last_in);
7397 movl(op1, Address(in, 0));
7398 movl(sum, Address(out, offs, Address::times_4, -4));
7399
7400 movl(raxReg, k);
7401 mull(op1); //tmp4 * eax -> edx:eax
7402 addl(sum, carry);
7403 adcl(rdxReg, 0);
7404 addl(sum, raxReg);
7405 adcl(rdxReg, 0);
7406 movl(carry, rdxReg);
7407
7408 movl(Address(out, offs, Address::times_4, -4), sum);
7409
7410 bind(L_carry);
7411 //return tmp5/carry as carry in rax
7412 movl(rax, carry);
7413
7414 bind(L_done);
7415 pop(tmp5);
7416 pop(tmp4);
7417 pop(tmp3);
7418 pop(tmp2);
7419 pop(tmp1);
7420 }
7421
7422 /**
7423 * Emits code to update CRC-32 with a byte value according to constants in table
7424 *
7425 * @param [in,out]crc Register containing the crc.
7426 * @param [in]val Register containing the byte to fold into the CRC.
7427 * @param [in]table Register containing the table of crc constants.
7428 *
7429 * uint32_t crc;
7430 * val = crc_table[(val ^ crc) & 0xFF];
7431 * crc = val ^ (crc >> 8);
7432 *
7433 */
7434 void MacroAssembler::update_byte_crc32(Register crc, Register val, Register table) {
7435 xorl(val, crc);
7436 andl(val, 0xFF);
7437 shrl(crc, 8); // unsigned shift
7438 xorl(crc, Address(table, val, Address::times_4, 0));
7439 }
7440
7441 /**
7442 * Fold 128-bit data chunk
7443 */
7444 void MacroAssembler::fold_128bit_crc32(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, Register buf, int offset) {
7445 if (UseAVX > 0) {
7446 vpclmulhdq(xtmp, xK, xcrc); // [123:64]
7447 vpclmulldq(xcrc, xK, xcrc); // [63:0]
7448 vpxor(xcrc, xcrc, Address(buf, offset), 0 /* vector_len */);
7449 pxor(xcrc, xtmp);
7450 } else {
7451 movdqa(xtmp, xcrc);
7452 pclmulhdq(xtmp, xK); // [123:64]
7453 pclmulldq(xcrc, xK); // [63:0]
7454 pxor(xcrc, xtmp);
7455 movdqu(xtmp, Address(buf, offset));
7456 pxor(xcrc, xtmp);
7457 }
7458 }
7459
7460 void MacroAssembler::fold_128bit_crc32(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, XMMRegister xbuf) {
7461 if (UseAVX > 0) {
7462 vpclmulhdq(xtmp, xK, xcrc);
7463 vpclmulldq(xcrc, xK, xcrc);
7464 pxor(xcrc, xbuf);
7465 pxor(xcrc, xtmp);
7466 } else {
7467 movdqa(xtmp, xcrc);
7468 pclmulhdq(xtmp, xK);
7469 pclmulldq(xcrc, xK);
7470 pxor(xcrc, xbuf);
7471 pxor(xcrc, xtmp);
7472 }
7473 }
7474
7475 /**
7476 * 8-bit folds to compute 32-bit CRC
7477 *
7478 * uint64_t xcrc;
7479 * timesXtoThe32[xcrc & 0xFF] ^ (xcrc >> 8);
7480 */
7481 void MacroAssembler::fold_8bit_crc32(XMMRegister xcrc, Register table, XMMRegister xtmp, Register tmp) {
7482 movdl(tmp, xcrc);
7483 andl(tmp, 0xFF);
7484 movdl(xtmp, Address(table, tmp, Address::times_4, 0));
7485 psrldq(xcrc, 1); // unsigned shift one byte
7486 pxor(xcrc, xtmp);
7487 }
7488
7489 /**
7490 * uint32_t crc;
7491 * timesXtoThe32[crc & 0xFF] ^ (crc >> 8);
7492 */
7493 void MacroAssembler::fold_8bit_crc32(Register crc, Register table, Register tmp) {
7494 movl(tmp, crc);
7495 andl(tmp, 0xFF);
7496 shrl(crc, 8);
7497 xorl(crc, Address(table, tmp, Address::times_4, 0));
7498 }
7499
7500 /**
7501 * @param crc register containing existing CRC (32-bit)
7502 * @param buf register pointing to input byte buffer (byte*)
7503 * @param len register containing number of bytes
7504 * @param table register that will contain address of CRC table
7505 * @param tmp scratch register
7506 */
7507 void MacroAssembler::kernel_crc32(Register crc, Register buf, Register len, Register table, Register tmp) {
7508 assert_different_registers(crc, buf, len, table, tmp, rax);
7509
7510 Label L_tail, L_tail_restore, L_tail_loop, L_exit, L_align_loop, L_aligned;
7511 Label L_fold_tail, L_fold_128b, L_fold_512b, L_fold_512b_loop, L_fold_tail_loop;
7512
7513 // For EVEX with VL and BW, provide a standard mask, VL = 128 will guide the merge
7514 // context for the registers used, where all instructions below are using 128-bit mode
7515 // On EVEX without VL and BW, these instructions will all be AVX.
7516 lea(table, ExternalAddress(StubRoutines::crc_table_addr()));
7517 notl(crc); // ~crc
7518 cmpl(len, 16);
7519 jcc(Assembler::less, L_tail);
7520
7521 // Align buffer to 16 bytes
7522 movl(tmp, buf);
7523 andl(tmp, 0xF);
7524 jccb(Assembler::zero, L_aligned);
7525 subl(tmp, 16);
7526 addl(len, tmp);
7527
7528 align(4);
7529 BIND(L_align_loop);
7530 movsbl(rax, Address(buf, 0)); // load byte with sign extension
7531 update_byte_crc32(crc, rax, table);
7532 increment(buf);
7533 incrementl(tmp);
7534 jccb(Assembler::less, L_align_loop);
7535
7536 BIND(L_aligned);
7537 movl(tmp, len); // save
7538 shrl(len, 4);
7539 jcc(Assembler::zero, L_tail_restore);
7540
7541 // Fold crc into first bytes of vector
7542 movdqa(xmm1, Address(buf, 0));
7543 movdl(rax, xmm1);
7544 xorl(crc, rax);
7545 if (VM_Version::supports_sse4_1()) {
7546 pinsrd(xmm1, crc, 0);
7547 } else {
7548 pinsrw(xmm1, crc, 0);
7549 shrl(crc, 16);
7550 pinsrw(xmm1, crc, 1);
7551 }
7552 addptr(buf, 16);
7553 subl(len, 4); // len > 0
7554 jcc(Assembler::less, L_fold_tail);
7555
7556 movdqa(xmm2, Address(buf, 0));
7557 movdqa(xmm3, Address(buf, 16));
7558 movdqa(xmm4, Address(buf, 32));
7559 addptr(buf, 48);
7560 subl(len, 3);
7561 jcc(Assembler::lessEqual, L_fold_512b);
7562
7563 // Fold total 512 bits of polynomial on each iteration,
7564 // 128 bits per each of 4 parallel streams.
7565 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 32), rscratch1);
7566
7567 align32();
7568 BIND(L_fold_512b_loop);
7569 fold_128bit_crc32(xmm1, xmm0, xmm5, buf, 0);
7570 fold_128bit_crc32(xmm2, xmm0, xmm5, buf, 16);
7571 fold_128bit_crc32(xmm3, xmm0, xmm5, buf, 32);
7572 fold_128bit_crc32(xmm4, xmm0, xmm5, buf, 48);
7573 addptr(buf, 64);
7574 subl(len, 4);
7575 jcc(Assembler::greater, L_fold_512b_loop);
7576
7577 // Fold 512 bits to 128 bits.
7578 BIND(L_fold_512b);
7579 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 16), rscratch1);
7580 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm2);
7581 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm3);
7582 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm4);
7583
7584 // Fold the rest of 128 bits data chunks
7585 BIND(L_fold_tail);
7586 addl(len, 3);
7587 jccb(Assembler::lessEqual, L_fold_128b);
7588 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 16), rscratch1);
7589
7590 BIND(L_fold_tail_loop);
7591 fold_128bit_crc32(xmm1, xmm0, xmm5, buf, 0);
7592 addptr(buf, 16);
7593 decrementl(len);
7594 jccb(Assembler::greater, L_fold_tail_loop);
7595
7596 // Fold 128 bits in xmm1 down into 32 bits in crc register.
7597 BIND(L_fold_128b);
7598 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr()), rscratch1);
7599 if (UseAVX > 0) {
7600 vpclmulqdq(xmm2, xmm0, xmm1, 0x1);
7601 vpand(xmm3, xmm0, xmm2, 0 /* vector_len */);
7602 vpclmulqdq(xmm0, xmm0, xmm3, 0x1);
7603 } else {
7604 movdqa(xmm2, xmm0);
7605 pclmulqdq(xmm2, xmm1, 0x1);
7606 movdqa(xmm3, xmm0);
7607 pand(xmm3, xmm2);
7608 pclmulqdq(xmm0, xmm3, 0x1);
7609 }
7610 psrldq(xmm1, 8);
7611 psrldq(xmm2, 4);
7612 pxor(xmm0, xmm1);
7613 pxor(xmm0, xmm2);
7614
7615 // 8 8-bit folds to compute 32-bit CRC.
7616 for (int j = 0; j < 4; j++) {
7617 fold_8bit_crc32(xmm0, table, xmm1, rax);
7618 }
7619 movdl(crc, xmm0); // mov 32 bits to general register
7620 for (int j = 0; j < 4; j++) {
7621 fold_8bit_crc32(crc, table, rax);
7622 }
7623
7624 BIND(L_tail_restore);
7625 movl(len, tmp); // restore
7626 BIND(L_tail);
7627 andl(len, 0xf);
7628 jccb(Assembler::zero, L_exit);
7629
7630 // Fold the rest of bytes
7631 align(4);
7632 BIND(L_tail_loop);
7633 movsbl(rax, Address(buf, 0)); // load byte with sign extension
7634 update_byte_crc32(crc, rax, table);
7635 increment(buf);
7636 decrementl(len);
7637 jccb(Assembler::greater, L_tail_loop);
7638
7639 BIND(L_exit);
7640 notl(crc); // ~c
7641 }
7642
7643 // Helper function for AVX 512 CRC32
7644 // Fold 512-bit data chunks
7645 void MacroAssembler::fold512bit_crc32_avx512(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, Register buf,
7646 Register pos, int offset) {
7647 evmovdquq(xmm3, Address(buf, pos, Address::times_1, offset), Assembler::AVX_512bit);
7648 evpclmulqdq(xtmp, xcrc, xK, 0x10, Assembler::AVX_512bit); // [123:64]
7649 evpclmulqdq(xmm2, xcrc, xK, 0x01, Assembler::AVX_512bit); // [63:0]
7650 evpxorq(xcrc, xtmp, xmm2, Assembler::AVX_512bit /* vector_len */);
7651 evpxorq(xcrc, xcrc, xmm3, Assembler::AVX_512bit /* vector_len */);
7652 }
7653
7654 // Helper function for AVX 512 CRC32
7655 // Compute CRC32 for < 256B buffers
7656 void MacroAssembler::kernel_crc32_avx512_256B(Register crc, Register buf, Register len, Register table, Register pos,
7657 Register tmp1, Register tmp2, Label& L_barrett, Label& L_16B_reduction_loop,
7658 Label& L_get_last_two_xmms, Label& L_128_done, Label& L_cleanup) {
7659
7660 Label L_less_than_32, L_exact_16_left, L_less_than_16_left;
7661 Label L_less_than_8_left, L_less_than_4_left, L_less_than_2_left, L_zero_left;
7662 Label L_only_less_than_4, L_only_less_than_3, L_only_less_than_2;
7663
7664 // check if there is enough buffer to be able to fold 16B at a time
7665 cmpl(len, 32);
7666 jcc(Assembler::less, L_less_than_32);
7667
7668 // if there is, load the constants
7669 movdqu(xmm10, Address(table, 1 * 16)); //rk1 and rk2 in xmm10
7670 movdl(xmm0, crc); // get the initial crc value
7671 movdqu(xmm7, Address(buf, pos, Address::times_1, 0 * 16)); //load the plaintext
7672 pxor(xmm7, xmm0);
7673
7674 // update the buffer pointer
7675 addl(pos, 16);
7676 //update the counter.subtract 32 instead of 16 to save one instruction from the loop
7677 subl(len, 32);
7678 jmp(L_16B_reduction_loop);
7679
7680 bind(L_less_than_32);
7681 //mov initial crc to the return value. this is necessary for zero - length buffers.
7682 movl(rax, crc);
7683 testl(len, len);
7684 jcc(Assembler::equal, L_cleanup);
7685
7686 movdl(xmm0, crc); //get the initial crc value
7687
7688 cmpl(len, 16);
7689 jcc(Assembler::equal, L_exact_16_left);
7690 jcc(Assembler::less, L_less_than_16_left);
7691
7692 movdqu(xmm7, Address(buf, pos, Address::times_1, 0 * 16)); //load the plaintext
7693 pxor(xmm7, xmm0); //xor the initial crc value
7694 addl(pos, 16);
7695 subl(len, 16);
7696 movdqu(xmm10, Address(table, 1 * 16)); // rk1 and rk2 in xmm10
7697 jmp(L_get_last_two_xmms);
7698
7699 bind(L_less_than_16_left);
7700 //use stack space to load data less than 16 bytes, zero - out the 16B in memory first.
7701 pxor(xmm1, xmm1);
7702 movptr(tmp1, rsp);
7703 movdqu(Address(tmp1, 0 * 16), xmm1);
7704
7705 cmpl(len, 4);
7706 jcc(Assembler::less, L_only_less_than_4);
7707
7708 //backup the counter value
7709 movl(tmp2, len);
7710 cmpl(len, 8);
7711 jcc(Assembler::less, L_less_than_8_left);
7712
7713 //load 8 Bytes
7714 movq(rax, Address(buf, pos, Address::times_1, 0 * 16));
7715 movq(Address(tmp1, 0 * 16), rax);
7716 addptr(tmp1, 8);
7717 subl(len, 8);
7718 addl(pos, 8);
7719
7720 bind(L_less_than_8_left);
7721 cmpl(len, 4);
7722 jcc(Assembler::less, L_less_than_4_left);
7723
7724 //load 4 Bytes
7725 movl(rax, Address(buf, pos, Address::times_1, 0));
7726 movl(Address(tmp1, 0 * 16), rax);
7727 addptr(tmp1, 4);
7728 subl(len, 4);
7729 addl(pos, 4);
7730
7731 bind(L_less_than_4_left);
7732 cmpl(len, 2);
7733 jcc(Assembler::less, L_less_than_2_left);
7734
7735 // load 2 Bytes
7736 movw(rax, Address(buf, pos, Address::times_1, 0));
7737 movl(Address(tmp1, 0 * 16), rax);
7738 addptr(tmp1, 2);
7739 subl(len, 2);
7740 addl(pos, 2);
7741
7742 bind(L_less_than_2_left);
7743 cmpl(len, 1);
7744 jcc(Assembler::less, L_zero_left);
7745
7746 // load 1 Byte
7747 movb(rax, Address(buf, pos, Address::times_1, 0));
7748 movb(Address(tmp1, 0 * 16), rax);
7749
7750 bind(L_zero_left);
7751 movdqu(xmm7, Address(rsp, 0));
7752 pxor(xmm7, xmm0); //xor the initial crc value
7753
7754 lea(rax, ExternalAddress(StubRoutines::x86::shuf_table_crc32_avx512_addr()));
7755 movdqu(xmm0, Address(rax, tmp2));
7756 pshufb(xmm7, xmm0);
7757 jmp(L_128_done);
7758
7759 bind(L_exact_16_left);
7760 movdqu(xmm7, Address(buf, pos, Address::times_1, 0));
7761 pxor(xmm7, xmm0); //xor the initial crc value
7762 jmp(L_128_done);
7763
7764 bind(L_only_less_than_4);
7765 cmpl(len, 3);
7766 jcc(Assembler::less, L_only_less_than_3);
7767
7768 // load 3 Bytes
7769 movb(rax, Address(buf, pos, Address::times_1, 0));
7770 movb(Address(tmp1, 0), rax);
7771
7772 movb(rax, Address(buf, pos, Address::times_1, 1));
7773 movb(Address(tmp1, 1), rax);
7774
7775 movb(rax, Address(buf, pos, Address::times_1, 2));
7776 movb(Address(tmp1, 2), rax);
7777
7778 movdqu(xmm7, Address(rsp, 0));
7779 pxor(xmm7, xmm0); //xor the initial crc value
7780
7781 pslldq(xmm7, 0x5);
7782 jmp(L_barrett);
7783 bind(L_only_less_than_3);
7784 cmpl(len, 2);
7785 jcc(Assembler::less, L_only_less_than_2);
7786
7787 // load 2 Bytes
7788 movb(rax, Address(buf, pos, Address::times_1, 0));
7789 movb(Address(tmp1, 0), rax);
7790
7791 movb(rax, Address(buf, pos, Address::times_1, 1));
7792 movb(Address(tmp1, 1), rax);
7793
7794 movdqu(xmm7, Address(rsp, 0));
7795 pxor(xmm7, xmm0); //xor the initial crc value
7796
7797 pslldq(xmm7, 0x6);
7798 jmp(L_barrett);
7799
7800 bind(L_only_less_than_2);
7801 //load 1 Byte
7802 movb(rax, Address(buf, pos, Address::times_1, 0));
7803 movb(Address(tmp1, 0), rax);
7804
7805 movdqu(xmm7, Address(rsp, 0));
7806 pxor(xmm7, xmm0); //xor the initial crc value
7807
7808 pslldq(xmm7, 0x7);
7809 }
7810
7811 /**
7812 * Compute CRC32 using AVX512 instructions
7813 * param crc register containing existing CRC (32-bit)
7814 * param buf register pointing to input byte buffer (byte*)
7815 * param len register containing number of bytes
7816 * param table address of crc or crc32c table
7817 * param tmp1 scratch register
7818 * param tmp2 scratch register
7819 * return rax result register
7820 *
7821 * This routine is identical for crc32c with the exception of the precomputed constant
7822 * table which will be passed as the table argument. The calculation steps are
7823 * the same for both variants.
7824 */
7825 void MacroAssembler::kernel_crc32_avx512(Register crc, Register buf, Register len, Register table, Register tmp1, Register tmp2) {
7826 assert_different_registers(crc, buf, len, table, tmp1, tmp2, rax, r12);
7827
7828 Label L_tail, L_tail_restore, L_tail_loop, L_exit, L_align_loop, L_aligned;
7829 Label L_fold_tail, L_fold_128b, L_fold_512b, L_fold_512b_loop, L_fold_tail_loop;
7830 Label L_less_than_256, L_fold_128_B_loop, L_fold_256_B_loop;
7831 Label L_fold_128_B_register, L_final_reduction_for_128, L_16B_reduction_loop;
7832 Label L_128_done, L_get_last_two_xmms, L_barrett, L_cleanup;
7833
7834 const Register pos = r12;
7835 push(r12);
7836 subptr(rsp, 16 * 2 + 8);
7837
7838 // For EVEX with VL and BW, provide a standard mask, VL = 128 will guide the merge
7839 // context for the registers used, where all instructions below are using 128-bit mode
7840 // On EVEX without VL and BW, these instructions will all be AVX.
7841 movl(pos, 0);
7842
7843 // check if smaller than 256B
7844 cmpl(len, 256);
7845 jcc(Assembler::less, L_less_than_256);
7846
7847 // load the initial crc value
7848 movdl(xmm10, crc);
7849
7850 // receive the initial 64B data, xor the initial crc value
7851 evmovdquq(xmm0, Address(buf, pos, Address::times_1, 0 * 64), Assembler::AVX_512bit);
7852 evmovdquq(xmm4, Address(buf, pos, Address::times_1, 1 * 64), Assembler::AVX_512bit);
7853 evpxorq(xmm0, xmm0, xmm10, Assembler::AVX_512bit);
7854 evbroadcasti32x4(xmm10, Address(table, 2 * 16), Assembler::AVX_512bit); //zmm10 has rk3 and rk4
7855
7856 subl(len, 256);
7857 cmpl(len, 256);
7858 jcc(Assembler::less, L_fold_128_B_loop);
7859
7860 evmovdquq(xmm7, Address(buf, pos, Address::times_1, 2 * 64), Assembler::AVX_512bit);
7861 evmovdquq(xmm8, Address(buf, pos, Address::times_1, 3 * 64), Assembler::AVX_512bit);
7862 evbroadcasti32x4(xmm16, Address(table, 0 * 16), Assembler::AVX_512bit); //zmm16 has rk-1 and rk-2
7863 subl(len, 256);
7864
7865 bind(L_fold_256_B_loop);
7866 addl(pos, 256);
7867 fold512bit_crc32_avx512(xmm0, xmm16, xmm1, buf, pos, 0 * 64);
7868 fold512bit_crc32_avx512(xmm4, xmm16, xmm1, buf, pos, 1 * 64);
7869 fold512bit_crc32_avx512(xmm7, xmm16, xmm1, buf, pos, 2 * 64);
7870 fold512bit_crc32_avx512(xmm8, xmm16, xmm1, buf, pos, 3 * 64);
7871
7872 subl(len, 256);
7873 jcc(Assembler::greaterEqual, L_fold_256_B_loop);
7874
7875 // Fold 256 into 128
7876 addl(pos, 256);
7877 evpclmulqdq(xmm1, xmm0, xmm10, 0x01, Assembler::AVX_512bit);
7878 evpclmulqdq(xmm2, xmm0, xmm10, 0x10, Assembler::AVX_512bit);
7879 vpternlogq(xmm7, 0x96, xmm1, xmm2, Assembler::AVX_512bit); // xor ABC
7880
7881 evpclmulqdq(xmm5, xmm4, xmm10, 0x01, Assembler::AVX_512bit);
7882 evpclmulqdq(xmm6, xmm4, xmm10, 0x10, Assembler::AVX_512bit);
7883 vpternlogq(xmm8, 0x96, xmm5, xmm6, Assembler::AVX_512bit); // xor ABC
7884
7885 evmovdquq(xmm0, xmm7, Assembler::AVX_512bit);
7886 evmovdquq(xmm4, xmm8, Assembler::AVX_512bit);
7887
7888 addl(len, 128);
7889 jmp(L_fold_128_B_register);
7890
7891 // at this section of the code, there is 128 * x + y(0 <= y<128) bytes of buffer.The fold_128_B_loop
7892 // loop will fold 128B at a time until we have 128 + y Bytes of buffer
7893
7894 // fold 128B at a time.This section of the code folds 8 xmm registers in parallel
7895 bind(L_fold_128_B_loop);
7896 addl(pos, 128);
7897 fold512bit_crc32_avx512(xmm0, xmm10, xmm1, buf, pos, 0 * 64);
7898 fold512bit_crc32_avx512(xmm4, xmm10, xmm1, buf, pos, 1 * 64);
7899
7900 subl(len, 128);
7901 jcc(Assembler::greaterEqual, L_fold_128_B_loop);
7902
7903 addl(pos, 128);
7904
7905 // at this point, the buffer pointer is pointing at the last y Bytes of the buffer, where 0 <= y < 128
7906 // the 128B of folded data is in 8 of the xmm registers : xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7
7907 bind(L_fold_128_B_register);
7908 evmovdquq(xmm16, Address(table, 5 * 16), Assembler::AVX_512bit); // multiply by rk9-rk16
7909 evmovdquq(xmm11, Address(table, 9 * 16), Assembler::AVX_512bit); // multiply by rk17-rk20, rk1,rk2, 0,0
7910 evpclmulqdq(xmm1, xmm0, xmm16, 0x01, Assembler::AVX_512bit);
7911 evpclmulqdq(xmm2, xmm0, xmm16, 0x10, Assembler::AVX_512bit);
7912 // save last that has no multiplicand
7913 vextracti64x2(xmm7, xmm4, 3);
7914
7915 evpclmulqdq(xmm5, xmm4, xmm11, 0x01, Assembler::AVX_512bit);
7916 evpclmulqdq(xmm6, xmm4, xmm11, 0x10, Assembler::AVX_512bit);
7917 // Needed later in reduction loop
7918 movdqu(xmm10, Address(table, 1 * 16));
7919 vpternlogq(xmm1, 0x96, xmm2, xmm5, Assembler::AVX_512bit); // xor ABC
7920 vpternlogq(xmm1, 0x96, xmm6, xmm7, Assembler::AVX_512bit); // xor ABC
7921
7922 // Swap 1,0,3,2 - 01 00 11 10
7923 evshufi64x2(xmm8, xmm1, xmm1, 0x4e, Assembler::AVX_512bit);
7924 evpxorq(xmm8, xmm8, xmm1, Assembler::AVX_256bit);
7925 vextracti128(xmm5, xmm8, 1);
7926 evpxorq(xmm7, xmm5, xmm8, Assembler::AVX_128bit);
7927
7928 // instead of 128, we add 128 - 16 to the loop counter to save 1 instruction from the loop
7929 // instead of a cmp instruction, we use the negative flag with the jl instruction
7930 addl(len, 128 - 16);
7931 jcc(Assembler::less, L_final_reduction_for_128);
7932
7933 bind(L_16B_reduction_loop);
7934 vpclmulqdq(xmm8, xmm7, xmm10, 0x01);
7935 vpclmulqdq(xmm7, xmm7, xmm10, 0x10);
7936 vpxor(xmm7, xmm7, xmm8, Assembler::AVX_128bit);
7937 movdqu(xmm0, Address(buf, pos, Address::times_1, 0 * 16));
7938 vpxor(xmm7, xmm7, xmm0, Assembler::AVX_128bit);
7939 addl(pos, 16);
7940 subl(len, 16);
7941 jcc(Assembler::greaterEqual, L_16B_reduction_loop);
7942
7943 bind(L_final_reduction_for_128);
7944 addl(len, 16);
7945 jcc(Assembler::equal, L_128_done);
7946
7947 bind(L_get_last_two_xmms);
7948 movdqu(xmm2, xmm7);
7949 addl(pos, len);
7950 movdqu(xmm1, Address(buf, pos, Address::times_1, -16));
7951 subl(pos, len);
7952
7953 // get rid of the extra data that was loaded before
7954 // load the shift constant
7955 lea(rax, ExternalAddress(StubRoutines::x86::shuf_table_crc32_avx512_addr()));
7956 movdqu(xmm0, Address(rax, len));
7957 addl(rax, len);
7958
7959 vpshufb(xmm7, xmm7, xmm0, Assembler::AVX_128bit);
7960 //Change mask to 512
7961 vpxor(xmm0, xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_avx512_addr() + 2 * 16), Assembler::AVX_128bit, tmp2);
7962 vpshufb(xmm2, xmm2, xmm0, Assembler::AVX_128bit);
7963
7964 blendvpb(xmm2, xmm2, xmm1, xmm0, Assembler::AVX_128bit);
7965 vpclmulqdq(xmm8, xmm7, xmm10, 0x01);
7966 vpclmulqdq(xmm7, xmm7, xmm10, 0x10);
7967 vpxor(xmm7, xmm7, xmm8, Assembler::AVX_128bit);
7968 vpxor(xmm7, xmm7, xmm2, Assembler::AVX_128bit);
7969
7970 bind(L_128_done);
7971 // compute crc of a 128-bit value
7972 movdqu(xmm10, Address(table, 3 * 16));
7973 movdqu(xmm0, xmm7);
7974
7975 // 64b fold
7976 vpclmulqdq(xmm7, xmm7, xmm10, 0x0);
7977 vpsrldq(xmm0, xmm0, 0x8, Assembler::AVX_128bit);
7978 vpxor(xmm7, xmm7, xmm0, Assembler::AVX_128bit);
7979
7980 // 32b fold
7981 movdqu(xmm0, xmm7);
7982 vpslldq(xmm7, xmm7, 0x4, Assembler::AVX_128bit);
7983 vpclmulqdq(xmm7, xmm7, xmm10, 0x10);
7984 vpxor(xmm7, xmm7, xmm0, Assembler::AVX_128bit);
7985 jmp(L_barrett);
7986
7987 bind(L_less_than_256);
7988 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);
7989
7990 //barrett reduction
7991 bind(L_barrett);
7992 vpand(xmm7, xmm7, ExternalAddress(StubRoutines::x86::crc_by128_masks_avx512_addr() + 1 * 16), Assembler::AVX_128bit, tmp2);
7993 movdqu(xmm1, xmm7);
7994 movdqu(xmm2, xmm7);
7995 movdqu(xmm10, Address(table, 4 * 16));
7996
7997 pclmulqdq(xmm7, xmm10, 0x0);
7998 pxor(xmm7, xmm2);
7999 vpand(xmm7, xmm7, ExternalAddress(StubRoutines::x86::crc_by128_masks_avx512_addr()), Assembler::AVX_128bit, tmp2);
8000 movdqu(xmm2, xmm7);
8001 pclmulqdq(xmm7, xmm10, 0x10);
8002 pxor(xmm7, xmm2);
8003 pxor(xmm7, xmm1);
8004 pextrd(crc, xmm7, 2);
8005
8006 bind(L_cleanup);
8007 addptr(rsp, 16 * 2 + 8);
8008 pop(r12);
8009 }
8010
8011 // S. Gueron / Information Processing Letters 112 (2012) 184
8012 // Algorithm 4: Computing carry-less multiplication using a precomputed lookup table.
8013 // Input: A 32 bit value B = [byte3, byte2, byte1, byte0].
8014 // Output: the 64-bit carry-less product of B * CONST
8015 void MacroAssembler::crc32c_ipl_alg4(Register in, uint32_t n,
8016 Register tmp1, Register tmp2, Register tmp3) {
8017 lea(tmp3, ExternalAddress(StubRoutines::crc32c_table_addr()));
8018 if (n > 0) {
8019 addq(tmp3, n * 256 * 8);
8020 }
8021 // Q1 = TABLEExt[n][B & 0xFF];
8022 movl(tmp1, in);
8023 andl(tmp1, 0x000000FF);
8024 shll(tmp1, 3);
8025 addq(tmp1, tmp3);
8026 movq(tmp1, Address(tmp1, 0));
8027
8028 // Q2 = TABLEExt[n][B >> 8 & 0xFF];
8029 movl(tmp2, in);
8030 shrl(tmp2, 8);
8031 andl(tmp2, 0x000000FF);
8032 shll(tmp2, 3);
8033 addq(tmp2, tmp3);
8034 movq(tmp2, Address(tmp2, 0));
8035
8036 shlq(tmp2, 8);
8037 xorq(tmp1, tmp2);
8038
8039 // Q3 = TABLEExt[n][B >> 16 & 0xFF];
8040 movl(tmp2, in);
8041 shrl(tmp2, 16);
8042 andl(tmp2, 0x000000FF);
8043 shll(tmp2, 3);
8044 addq(tmp2, tmp3);
8045 movq(tmp2, Address(tmp2, 0));
8046
8047 shlq(tmp2, 16);
8048 xorq(tmp1, tmp2);
8049
8050 // Q4 = TABLEExt[n][B >> 24 & 0xFF];
8051 shrl(in, 24);
8052 andl(in, 0x000000FF);
8053 shll(in, 3);
8054 addq(in, tmp3);
8055 movq(in, Address(in, 0));
8056
8057 shlq(in, 24);
8058 xorq(in, tmp1);
8059 // return Q1 ^ Q2 << 8 ^ Q3 << 16 ^ Q4 << 24;
8060 }
8061
8062 void MacroAssembler::crc32c_pclmulqdq(XMMRegister w_xtmp1,
8063 Register in_out,
8064 uint32_t const_or_pre_comp_const_index, bool is_pclmulqdq_supported,
8065 XMMRegister w_xtmp2,
8066 Register tmp1,
8067 Register n_tmp2, Register n_tmp3) {
8068 if (is_pclmulqdq_supported) {
8069 movdl(w_xtmp1, in_out); // modified blindly
8070
8071 movl(tmp1, const_or_pre_comp_const_index);
8072 movdl(w_xtmp2, tmp1);
8073 pclmulqdq(w_xtmp1, w_xtmp2, 0);
8074
8075 movdq(in_out, w_xtmp1);
8076 } else {
8077 crc32c_ipl_alg4(in_out, const_or_pre_comp_const_index, tmp1, n_tmp2, n_tmp3);
8078 }
8079 }
8080
8081 // Recombination Alternative 2: No bit-reflections
8082 // T1 = (CRC_A * U1) << 1
8083 // T2 = (CRC_B * U2) << 1
8084 // C1 = T1 >> 32
8085 // C2 = T2 >> 32
8086 // T1 = T1 & 0xFFFFFFFF
8087 // T2 = T2 & 0xFFFFFFFF
8088 // T1 = CRC32(0, T1)
8089 // T2 = CRC32(0, T2)
8090 // C1 = C1 ^ T1
8091 // C2 = C2 ^ T2
8092 // CRC = C1 ^ C2 ^ CRC_C
8093 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,
8094 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
8095 Register tmp1, Register tmp2,
8096 Register n_tmp3) {
8097 crc32c_pclmulqdq(w_xtmp1, in_out, const_or_pre_comp_const_index_u1, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3);
8098 crc32c_pclmulqdq(w_xtmp2, in1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3);
8099 shlq(in_out, 1);
8100 movl(tmp1, in_out);
8101 shrq(in_out, 32);
8102 xorl(tmp2, tmp2);
8103 crc32(tmp2, tmp1, 4);
8104 xorl(in_out, tmp2); // we don't care about upper 32 bit contents here
8105 shlq(in1, 1);
8106 movl(tmp1, in1);
8107 shrq(in1, 32);
8108 xorl(tmp2, tmp2);
8109 crc32(tmp2, tmp1, 4);
8110 xorl(in1, tmp2);
8111 xorl(in_out, in1);
8112 xorl(in_out, in2);
8113 }
8114
8115 // Set N to predefined value
8116 // Subtract from a length of a buffer
8117 // execute in a loop:
8118 // CRC_A = 0xFFFFFFFF, CRC_B = 0, CRC_C = 0
8119 // for i = 1 to N do
8120 // CRC_A = CRC32(CRC_A, A[i])
8121 // CRC_B = CRC32(CRC_B, B[i])
8122 // CRC_C = CRC32(CRC_C, C[i])
8123 // end for
8124 // Recombine
8125 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,
8126 Register in_out1, Register in_out2, Register in_out3,
8127 Register tmp1, Register tmp2, Register tmp3,
8128 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
8129 Register tmp4, Register tmp5,
8130 Register n_tmp6) {
8131 Label L_processPartitions;
8132 Label L_processPartition;
8133 Label L_exit;
8134
8135 bind(L_processPartitions);
8136 cmpl(in_out1, 3 * size);
8137 jcc(Assembler::less, L_exit);
8138 xorl(tmp1, tmp1);
8139 xorl(tmp2, tmp2);
8140 movq(tmp3, in_out2);
8141 addq(tmp3, size);
8142
8143 bind(L_processPartition);
8144 crc32(in_out3, Address(in_out2, 0), 8);
8145 crc32(tmp1, Address(in_out2, size), 8);
8146 crc32(tmp2, Address(in_out2, size * 2), 8);
8147 addq(in_out2, 8);
8148 cmpq(in_out2, tmp3);
8149 jcc(Assembler::less, L_processPartition);
8150 crc32c_rec_alt2(const_or_pre_comp_const_index_u1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, in_out3, tmp1, tmp2,
8151 w_xtmp1, w_xtmp2, w_xtmp3,
8152 tmp4, tmp5,
8153 n_tmp6);
8154 addq(in_out2, 2 * size);
8155 subl(in_out1, 3 * size);
8156 jmp(L_processPartitions);
8157
8158 bind(L_exit);
8159 }
8160
8161 // Algorithm 2: Pipelined usage of the CRC32 instruction.
8162 // Input: A buffer I of L bytes.
8163 // Output: the CRC32C value of the buffer.
8164 // Notations:
8165 // Write L = 24N + r, with N = floor (L/24).
8166 // r = L mod 24 (0 <= r < 24).
8167 // Consider I as the concatenation of A|B|C|R, where A, B, C, each,
8168 // N quadwords, and R consists of r bytes.
8169 // A[j] = I [8j+7:8j], j= 0, 1, ..., N-1
8170 // B[j] = I [N + 8j+7:N + 8j], j= 0, 1, ..., N-1
8171 // C[j] = I [2N + 8j+7:2N + 8j], j= 0, 1, ..., N-1
8172 // if r > 0 R[j] = I [3N +j], j= 0, 1, ...,r-1
8173 void MacroAssembler::crc32c_ipl_alg2_alt2(Register in_out, Register in1, Register in2,
8174 Register tmp1, Register tmp2, Register tmp3,
8175 Register tmp4, Register tmp5, Register tmp6,
8176 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
8177 bool is_pclmulqdq_supported) {
8178 uint32_t const_or_pre_comp_const_index[CRC32C_NUM_PRECOMPUTED_CONSTANTS];
8179 Label L_wordByWord;
8180 Label L_byteByByteProlog;
8181 Label L_byteByByte;
8182 Label L_exit;
8183
8184 if (is_pclmulqdq_supported ) {
8185 const_or_pre_comp_const_index[1] = *(uint32_t *)StubRoutines::crc32c_table_addr();
8186 const_or_pre_comp_const_index[0] = *((uint32_t *)StubRoutines::crc32c_table_addr() + 1);
8187
8188 const_or_pre_comp_const_index[3] = *((uint32_t *)StubRoutines::crc32c_table_addr() + 2);
8189 const_or_pre_comp_const_index[2] = *((uint32_t *)StubRoutines::crc32c_table_addr() + 3);
8190
8191 const_or_pre_comp_const_index[5] = *((uint32_t *)StubRoutines::crc32c_table_addr() + 4);
8192 const_or_pre_comp_const_index[4] = *((uint32_t *)StubRoutines::crc32c_table_addr() + 5);
8193 assert((CRC32C_NUM_PRECOMPUTED_CONSTANTS - 1 ) == 5, "Checking whether you declared all of the constants based on the number of \"chunks\"");
8194 } else {
8195 const_or_pre_comp_const_index[0] = 1;
8196 const_or_pre_comp_const_index[1] = 0;
8197
8198 const_or_pre_comp_const_index[2] = 3;
8199 const_or_pre_comp_const_index[3] = 2;
8200
8201 const_or_pre_comp_const_index[4] = 5;
8202 const_or_pre_comp_const_index[5] = 4;
8203 }
8204 crc32c_proc_chunk(CRC32C_HIGH, const_or_pre_comp_const_index[0], const_or_pre_comp_const_index[1], is_pclmulqdq_supported,
8205 in2, in1, in_out,
8206 tmp1, tmp2, tmp3,
8207 w_xtmp1, w_xtmp2, w_xtmp3,
8208 tmp4, tmp5,
8209 tmp6);
8210 crc32c_proc_chunk(CRC32C_MIDDLE, const_or_pre_comp_const_index[2], const_or_pre_comp_const_index[3], is_pclmulqdq_supported,
8211 in2, in1, in_out,
8212 tmp1, tmp2, tmp3,
8213 w_xtmp1, w_xtmp2, w_xtmp3,
8214 tmp4, tmp5,
8215 tmp6);
8216 crc32c_proc_chunk(CRC32C_LOW, const_or_pre_comp_const_index[4], const_or_pre_comp_const_index[5], is_pclmulqdq_supported,
8217 in2, in1, in_out,
8218 tmp1, tmp2, tmp3,
8219 w_xtmp1, w_xtmp2, w_xtmp3,
8220 tmp4, tmp5,
8221 tmp6);
8222 movl(tmp1, in2);
8223 andl(tmp1, 0x00000007);
8224 negl(tmp1);
8225 addl(tmp1, in2);
8226 addq(tmp1, in1);
8227
8228 cmpq(in1, tmp1);
8229 jccb(Assembler::greaterEqual, L_byteByByteProlog);
8230 align(16);
8231 BIND(L_wordByWord);
8232 crc32(in_out, Address(in1, 0), 8);
8233 addq(in1, 8);
8234 cmpq(in1, tmp1);
8235 jcc(Assembler::less, L_wordByWord);
8236
8237 BIND(L_byteByByteProlog);
8238 andl(in2, 0x00000007);
8239 movl(tmp2, 1);
8240
8241 cmpl(tmp2, in2);
8242 jccb(Assembler::greater, L_exit);
8243 BIND(L_byteByByte);
8244 crc32(in_out, Address(in1, 0), 1);
8245 incq(in1);
8246 incl(tmp2);
8247 cmpl(tmp2, in2);
8248 jcc(Assembler::lessEqual, L_byteByByte);
8249
8250 BIND(L_exit);
8251 }
8252 #undef BIND
8253 #undef BLOCK_COMMENT
8254
8255 // Compress char[] array to byte[].
8256 // Intrinsic for java.lang.StringUTF16.compress(char[] src, int srcOff, byte[] dst, int dstOff, int len)
8257 // Return the array length if every element in array can be encoded,
8258 // otherwise, the index of first non-latin1 (> 0xff) character.
8259 // @IntrinsicCandidate
8260 // public static int compress(char[] src, int srcOff, byte[] dst, int dstOff, int len) {
8261 // for (int i = 0; i < len; i++) {
8262 // char c = src[srcOff];
8263 // if (c > 0xff) {
8264 // return i; // return index of non-latin1 char
8265 // }
8266 // dst[dstOff] = (byte)c;
8267 // srcOff++;
8268 // dstOff++;
8269 // }
8270 // return len;
8271 // }
8272 void MacroAssembler::char_array_compress(Register src, Register dst, Register len,
8273 XMMRegister tmp1Reg, XMMRegister tmp2Reg,
8274 XMMRegister tmp3Reg, XMMRegister tmp4Reg,
8275 Register tmp5, Register result, KRegister mask1, KRegister mask2) {
8276 Label copy_chars_loop, done, reset_sp, copy_tail;
8277
8278 // rsi: src
8279 // rdi: dst
8280 // rdx: len
8281 // rcx: tmp5
8282 // rax: result
8283
8284 // rsi holds start addr of source char[] to be compressed
8285 // rdi holds start addr of destination byte[]
8286 // rdx holds length
8287
8288 assert(len != result, "");
8289
8290 // save length for return
8291 movl(result, len);
8292
8293 if ((AVX3Threshold == 0) && (UseAVX > 2) && // AVX512
8294 VM_Version::supports_avx512vlbw() &&
8295 VM_Version::supports_bmi2()) {
8296
8297 Label copy_32_loop, copy_loop_tail, below_threshold, reset_for_copy_tail;
8298
8299 // alignment
8300 Label post_alignment;
8301
8302 // if length of the string is less than 32, handle it the old fashioned way
8303 testl(len, -32);
8304 jcc(Assembler::zero, below_threshold);
8305
8306 // First check whether a character is compressible ( <= 0xFF).
8307 // Create mask to test for Unicode chars inside zmm vector
8308 movl(tmp5, 0x00FF);
8309 evpbroadcastw(tmp2Reg, tmp5, Assembler::AVX_512bit);
8310
8311 testl(len, -64);
8312 jccb(Assembler::zero, post_alignment);
8313
8314 movl(tmp5, dst);
8315 andl(tmp5, (32 - 1));
8316 negl(tmp5);
8317 andl(tmp5, (32 - 1));
8318
8319 // bail out when there is nothing to be done
8320 testl(tmp5, 0xFFFFFFFF);
8321 jccb(Assembler::zero, post_alignment);
8322
8323 // ~(~0 << len), where len is the # of remaining elements to process
8324 movl(len, 0xFFFFFFFF);
8325 shlxl(len, len, tmp5);
8326 notl(len);
8327 kmovdl(mask2, len);
8328 movl(len, result);
8329
8330 evmovdquw(tmp1Reg, mask2, Address(src, 0), /*merge*/ false, Assembler::AVX_512bit);
8331 evpcmpw(mask1, mask2, tmp1Reg, tmp2Reg, Assembler::le, /*signed*/ false, Assembler::AVX_512bit);
8332 ktestd(mask1, mask2);
8333 jcc(Assembler::carryClear, copy_tail);
8334
8335 evpmovwb(Address(dst, 0), mask2, tmp1Reg, Assembler::AVX_512bit);
8336
8337 addptr(src, tmp5);
8338 addptr(src, tmp5);
8339 addptr(dst, tmp5);
8340 subl(len, tmp5);
8341
8342 bind(post_alignment);
8343 // end of alignment
8344
8345 movl(tmp5, len);
8346 andl(tmp5, (32 - 1)); // tail count (in chars)
8347 andl(len, ~(32 - 1)); // vector count (in chars)
8348 jccb(Assembler::zero, copy_loop_tail);
8349
8350 lea(src, Address(src, len, Address::times_2));
8351 lea(dst, Address(dst, len, Address::times_1));
8352 negptr(len);
8353
8354 bind(copy_32_loop);
8355 evmovdquw(tmp1Reg, Address(src, len, Address::times_2), Assembler::AVX_512bit);
8356 evpcmpuw(mask1, tmp1Reg, tmp2Reg, Assembler::le, Assembler::AVX_512bit);
8357 kortestdl(mask1, mask1);
8358 jccb(Assembler::carryClear, reset_for_copy_tail);
8359
8360 // All elements in current processed chunk are valid candidates for
8361 // compression. Write a truncated byte elements to the memory.
8362 evpmovwb(Address(dst, len, Address::times_1), tmp1Reg, Assembler::AVX_512bit);
8363 addptr(len, 32);
8364 jccb(Assembler::notZero, copy_32_loop);
8365
8366 bind(copy_loop_tail);
8367 // bail out when there is nothing to be done
8368 testl(tmp5, 0xFFFFFFFF);
8369 jcc(Assembler::zero, done);
8370
8371 movl(len, tmp5);
8372
8373 // ~(~0 << len), where len is the # of remaining elements to process
8374 movl(tmp5, 0xFFFFFFFF);
8375 shlxl(tmp5, tmp5, len);
8376 notl(tmp5);
8377
8378 kmovdl(mask2, tmp5);
8379
8380 evmovdquw(tmp1Reg, mask2, Address(src, 0), /*merge*/ false, Assembler::AVX_512bit);
8381 evpcmpw(mask1, mask2, tmp1Reg, tmp2Reg, Assembler::le, /*signed*/ false, Assembler::AVX_512bit);
8382 ktestd(mask1, mask2);
8383 jcc(Assembler::carryClear, copy_tail);
8384
8385 evpmovwb(Address(dst, 0), mask2, tmp1Reg, Assembler::AVX_512bit);
8386 jmp(done);
8387
8388 bind(reset_for_copy_tail);
8389 lea(src, Address(src, tmp5, Address::times_2));
8390 lea(dst, Address(dst, tmp5, Address::times_1));
8391 subptr(len, tmp5);
8392 jmp(copy_chars_loop);
8393
8394 bind(below_threshold);
8395 }
8396
8397 if (UseSSE42Intrinsics) {
8398 Label copy_32_loop, copy_16, copy_tail_sse, reset_for_copy_tail;
8399
8400 // vectored compression
8401 testl(len, 0xfffffff8);
8402 jcc(Assembler::zero, copy_tail);
8403
8404 movl(tmp5, 0xff00ff00); // create mask to test for Unicode chars in vectors
8405 movdl(tmp1Reg, tmp5);
8406 pshufd(tmp1Reg, tmp1Reg, 0); // store Unicode mask in tmp1Reg
8407
8408 andl(len, 0xfffffff0);
8409 jccb(Assembler::zero, copy_16);
8410
8411 // compress 16 chars per iter
8412 pxor(tmp4Reg, tmp4Reg);
8413
8414 lea(src, Address(src, len, Address::times_2));
8415 lea(dst, Address(dst, len, Address::times_1));
8416 negptr(len);
8417
8418 bind(copy_32_loop);
8419 movdqu(tmp2Reg, Address(src, len, Address::times_2)); // load 1st 8 characters
8420 por(tmp4Reg, tmp2Reg);
8421 movdqu(tmp3Reg, Address(src, len, Address::times_2, 16)); // load next 8 characters
8422 por(tmp4Reg, tmp3Reg);
8423 ptest(tmp4Reg, tmp1Reg); // check for Unicode chars in next vector
8424 jccb(Assembler::notZero, reset_for_copy_tail);
8425 packuswb(tmp2Reg, tmp3Reg); // only ASCII chars; compress each to 1 byte
8426 movdqu(Address(dst, len, Address::times_1), tmp2Reg);
8427 addptr(len, 16);
8428 jccb(Assembler::notZero, copy_32_loop);
8429
8430 // compress next vector of 8 chars (if any)
8431 bind(copy_16);
8432 // len = 0
8433 testl(result, 0x00000008); // check if there's a block of 8 chars to compress
8434 jccb(Assembler::zero, copy_tail_sse);
8435
8436 pxor(tmp3Reg, tmp3Reg);
8437
8438 movdqu(tmp2Reg, Address(src, 0));
8439 ptest(tmp2Reg, tmp1Reg); // check for Unicode chars in vector
8440 jccb(Assembler::notZero, reset_for_copy_tail);
8441 packuswb(tmp2Reg, tmp3Reg); // only LATIN1 chars; compress each to 1 byte
8442 movq(Address(dst, 0), tmp2Reg);
8443 addptr(src, 16);
8444 addptr(dst, 8);
8445 jmpb(copy_tail_sse);
8446
8447 bind(reset_for_copy_tail);
8448 movl(tmp5, result);
8449 andl(tmp5, 0x0000000f);
8450 lea(src, Address(src, tmp5, Address::times_2));
8451 lea(dst, Address(dst, tmp5, Address::times_1));
8452 subptr(len, tmp5);
8453 jmpb(copy_chars_loop);
8454
8455 bind(copy_tail_sse);
8456 movl(len, result);
8457 andl(len, 0x00000007); // tail count (in chars)
8458 }
8459 // compress 1 char per iter
8460 bind(copy_tail);
8461 testl(len, len);
8462 jccb(Assembler::zero, done);
8463 lea(src, Address(src, len, Address::times_2));
8464 lea(dst, Address(dst, len, Address::times_1));
8465 negptr(len);
8466
8467 bind(copy_chars_loop);
8468 load_unsigned_short(tmp5, Address(src, len, Address::times_2));
8469 testl(tmp5, 0xff00); // check if Unicode char
8470 jccb(Assembler::notZero, reset_sp);
8471 movb(Address(dst, len, Address::times_1), tmp5); // ASCII char; compress to 1 byte
8472 increment(len);
8473 jccb(Assembler::notZero, copy_chars_loop);
8474
8475 // add len then return (len will be zero if compress succeeded, otherwise negative)
8476 bind(reset_sp);
8477 addl(result, len);
8478
8479 bind(done);
8480 }
8481
8482 // Inflate byte[] array to char[].
8483 // ..\jdk\src\java.base\share\classes\java\lang\StringLatin1.java
8484 // @IntrinsicCandidate
8485 // private static void inflate(byte[] src, int srcOff, char[] dst, int dstOff, int len) {
8486 // for (int i = 0; i < len; i++) {
8487 // dst[dstOff++] = (char)(src[srcOff++] & 0xff);
8488 // }
8489 // }
8490 void MacroAssembler::byte_array_inflate(Register src, Register dst, Register len,
8491 XMMRegister tmp1, Register tmp2, KRegister mask) {
8492 Label copy_chars_loop, done, below_threshold, avx3_threshold;
8493 // rsi: src
8494 // rdi: dst
8495 // rdx: len
8496 // rcx: tmp2
8497
8498 // rsi holds start addr of source byte[] to be inflated
8499 // rdi holds start addr of destination char[]
8500 // rdx holds length
8501 assert_different_registers(src, dst, len, tmp2);
8502 movl(tmp2, len);
8503 if ((UseAVX > 2) && // AVX512
8504 VM_Version::supports_avx512vlbw() &&
8505 VM_Version::supports_bmi2()) {
8506
8507 Label copy_32_loop, copy_tail;
8508 Register tmp3_aliased = len;
8509
8510 // if length of the string is less than 16, handle it in an old fashioned way
8511 testl(len, -16);
8512 jcc(Assembler::zero, below_threshold);
8513
8514 testl(len, -1 * AVX3Threshold);
8515 jcc(Assembler::zero, avx3_threshold);
8516
8517 // In order to use only one arithmetic operation for the main loop we use
8518 // this pre-calculation
8519 andl(tmp2, (32 - 1)); // tail count (in chars), 32 element wide loop
8520 andl(len, -32); // vector count
8521 jccb(Assembler::zero, copy_tail);
8522
8523 lea(src, Address(src, len, Address::times_1));
8524 lea(dst, Address(dst, len, Address::times_2));
8525 negptr(len);
8526
8527
8528 // inflate 32 chars per iter
8529 bind(copy_32_loop);
8530 vpmovzxbw(tmp1, Address(src, len, Address::times_1), Assembler::AVX_512bit);
8531 evmovdquw(Address(dst, len, Address::times_2), tmp1, Assembler::AVX_512bit);
8532 addptr(len, 32);
8533 jcc(Assembler::notZero, copy_32_loop);
8534
8535 bind(copy_tail);
8536 // bail out when there is nothing to be done
8537 testl(tmp2, -1); // we don't destroy the contents of tmp2 here
8538 jcc(Assembler::zero, done);
8539
8540 // ~(~0 << length), where length is the # of remaining elements to process
8541 movl(tmp3_aliased, -1);
8542 shlxl(tmp3_aliased, tmp3_aliased, tmp2);
8543 notl(tmp3_aliased);
8544 kmovdl(mask, tmp3_aliased);
8545 evpmovzxbw(tmp1, mask, Address(src, 0), Assembler::AVX_512bit);
8546 evmovdquw(Address(dst, 0), mask, tmp1, /*merge*/ true, Assembler::AVX_512bit);
8547
8548 jmp(done);
8549 bind(avx3_threshold);
8550 }
8551 if (UseSSE42Intrinsics) {
8552 Label copy_16_loop, copy_8_loop, copy_bytes, copy_new_tail, copy_tail;
8553
8554 if (UseAVX > 1) {
8555 andl(tmp2, (16 - 1));
8556 andl(len, -16);
8557 jccb(Assembler::zero, copy_new_tail);
8558 } else {
8559 andl(tmp2, 0x00000007); // tail count (in chars)
8560 andl(len, 0xfffffff8); // vector count (in chars)
8561 jccb(Assembler::zero, copy_tail);
8562 }
8563
8564 // vectored inflation
8565 lea(src, Address(src, len, Address::times_1));
8566 lea(dst, Address(dst, len, Address::times_2));
8567 negptr(len);
8568
8569 if (UseAVX > 1) {
8570 bind(copy_16_loop);
8571 vpmovzxbw(tmp1, Address(src, len, Address::times_1), Assembler::AVX_256bit);
8572 vmovdqu(Address(dst, len, Address::times_2), tmp1);
8573 addptr(len, 16);
8574 jcc(Assembler::notZero, copy_16_loop);
8575
8576 bind(below_threshold);
8577 bind(copy_new_tail);
8578 movl(len, tmp2);
8579 andl(tmp2, 0x00000007);
8580 andl(len, 0xFFFFFFF8);
8581 jccb(Assembler::zero, copy_tail);
8582
8583 pmovzxbw(tmp1, Address(src, 0));
8584 movdqu(Address(dst, 0), tmp1);
8585 addptr(src, 8);
8586 addptr(dst, 2 * 8);
8587
8588 jmp(copy_tail, true);
8589 }
8590
8591 // inflate 8 chars per iter
8592 bind(copy_8_loop);
8593 pmovzxbw(tmp1, Address(src, len, Address::times_1)); // unpack to 8 words
8594 movdqu(Address(dst, len, Address::times_2), tmp1);
8595 addptr(len, 8);
8596 jcc(Assembler::notZero, copy_8_loop);
8597
8598 bind(copy_tail);
8599 movl(len, tmp2);
8600
8601 cmpl(len, 4);
8602 jccb(Assembler::less, copy_bytes);
8603
8604 movdl(tmp1, Address(src, 0)); // load 4 byte chars
8605 pmovzxbw(tmp1, tmp1);
8606 movq(Address(dst, 0), tmp1);
8607 subptr(len, 4);
8608 addptr(src, 4);
8609 addptr(dst, 8);
8610
8611 bind(copy_bytes);
8612 } else {
8613 bind(below_threshold);
8614 }
8615
8616 testl(len, len);
8617 jccb(Assembler::zero, done);
8618 lea(src, Address(src, len, Address::times_1));
8619 lea(dst, Address(dst, len, Address::times_2));
8620 negptr(len);
8621
8622 // inflate 1 char per iter
8623 bind(copy_chars_loop);
8624 load_unsigned_byte(tmp2, Address(src, len, Address::times_1)); // load byte char
8625 movw(Address(dst, len, Address::times_2), tmp2); // inflate byte char to word
8626 increment(len);
8627 jcc(Assembler::notZero, copy_chars_loop);
8628
8629 bind(done);
8630 }
8631
8632 void MacroAssembler::evmovdqu(BasicType type, KRegister kmask, XMMRegister dst, XMMRegister src, bool merge, int vector_len) {
8633 switch(type) {
8634 case T_BYTE:
8635 case T_BOOLEAN:
8636 evmovdqub(dst, kmask, src, merge, vector_len);
8637 break;
8638 case T_CHAR:
8639 case T_SHORT:
8640 evmovdquw(dst, kmask, src, merge, vector_len);
8641 break;
8642 case T_INT:
8643 case T_FLOAT:
8644 evmovdqul(dst, kmask, src, merge, vector_len);
8645 break;
8646 case T_LONG:
8647 case T_DOUBLE:
8648 evmovdquq(dst, kmask, src, merge, vector_len);
8649 break;
8650 default:
8651 fatal("Unexpected type argument %s", type2name(type));
8652 break;
8653 }
8654 }
8655
8656
8657 void MacroAssembler::evmovdqu(BasicType type, KRegister kmask, XMMRegister dst, Address src, bool merge, int vector_len) {
8658 switch(type) {
8659 case T_BYTE:
8660 case T_BOOLEAN:
8661 evmovdqub(dst, kmask, src, merge, vector_len);
8662 break;
8663 case T_CHAR:
8664 case T_SHORT:
8665 evmovdquw(dst, kmask, src, merge, vector_len);
8666 break;
8667 case T_INT:
8668 case T_FLOAT:
8669 evmovdqul(dst, kmask, src, merge, vector_len);
8670 break;
8671 case T_LONG:
8672 case T_DOUBLE:
8673 evmovdquq(dst, kmask, src, merge, vector_len);
8674 break;
8675 default:
8676 fatal("Unexpected type argument %s", type2name(type));
8677 break;
8678 }
8679 }
8680
8681 void MacroAssembler::evmovdqu(BasicType type, KRegister kmask, Address dst, XMMRegister src, bool merge, int vector_len) {
8682 switch(type) {
8683 case T_BYTE:
8684 case T_BOOLEAN:
8685 evmovdqub(dst, kmask, src, merge, vector_len);
8686 break;
8687 case T_CHAR:
8688 case T_SHORT:
8689 evmovdquw(dst, kmask, src, merge, vector_len);
8690 break;
8691 case T_INT:
8692 case T_FLOAT:
8693 evmovdqul(dst, kmask, src, merge, vector_len);
8694 break;
8695 case T_LONG:
8696 case T_DOUBLE:
8697 evmovdquq(dst, kmask, src, merge, vector_len);
8698 break;
8699 default:
8700 fatal("Unexpected type argument %s", type2name(type));
8701 break;
8702 }
8703 }
8704
8705 void MacroAssembler::knot(uint masklen, KRegister dst, KRegister src, KRegister ktmp, Register rtmp) {
8706 switch(masklen) {
8707 case 2:
8708 knotbl(dst, src);
8709 movl(rtmp, 3);
8710 kmovbl(ktmp, rtmp);
8711 kandbl(dst, ktmp, dst);
8712 break;
8713 case 4:
8714 knotbl(dst, src);
8715 movl(rtmp, 15);
8716 kmovbl(ktmp, rtmp);
8717 kandbl(dst, ktmp, dst);
8718 break;
8719 case 8:
8720 knotbl(dst, src);
8721 break;
8722 case 16:
8723 knotwl(dst, src);
8724 break;
8725 case 32:
8726 knotdl(dst, src);
8727 break;
8728 case 64:
8729 knotql(dst, src);
8730 break;
8731 default:
8732 fatal("Unexpected vector length %d", masklen);
8733 break;
8734 }
8735 }
8736
8737 void MacroAssembler::kand(BasicType type, KRegister dst, KRegister src1, KRegister src2) {
8738 switch(type) {
8739 case T_BOOLEAN:
8740 case T_BYTE:
8741 kandbl(dst, src1, src2);
8742 break;
8743 case T_CHAR:
8744 case T_SHORT:
8745 kandwl(dst, src1, src2);
8746 break;
8747 case T_INT:
8748 case T_FLOAT:
8749 kanddl(dst, src1, src2);
8750 break;
8751 case T_LONG:
8752 case T_DOUBLE:
8753 kandql(dst, src1, src2);
8754 break;
8755 default:
8756 fatal("Unexpected type argument %s", type2name(type));
8757 break;
8758 }
8759 }
8760
8761 void MacroAssembler::kor(BasicType type, KRegister dst, KRegister src1, KRegister src2) {
8762 switch(type) {
8763 case T_BOOLEAN:
8764 case T_BYTE:
8765 korbl(dst, src1, src2);
8766 break;
8767 case T_CHAR:
8768 case T_SHORT:
8769 korwl(dst, src1, src2);
8770 break;
8771 case T_INT:
8772 case T_FLOAT:
8773 kordl(dst, src1, src2);
8774 break;
8775 case T_LONG:
8776 case T_DOUBLE:
8777 korql(dst, src1, src2);
8778 break;
8779 default:
8780 fatal("Unexpected type argument %s", type2name(type));
8781 break;
8782 }
8783 }
8784
8785 void MacroAssembler::kxor(BasicType type, KRegister dst, KRegister src1, KRegister src2) {
8786 switch(type) {
8787 case T_BOOLEAN:
8788 case T_BYTE:
8789 kxorbl(dst, src1, src2);
8790 break;
8791 case T_CHAR:
8792 case T_SHORT:
8793 kxorwl(dst, src1, src2);
8794 break;
8795 case T_INT:
8796 case T_FLOAT:
8797 kxordl(dst, src1, src2);
8798 break;
8799 case T_LONG:
8800 case T_DOUBLE:
8801 kxorql(dst, src1, src2);
8802 break;
8803 default:
8804 fatal("Unexpected type argument %s", type2name(type));
8805 break;
8806 }
8807 }
8808
8809 void MacroAssembler::evperm(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
8810 switch(type) {
8811 case T_BOOLEAN:
8812 case T_BYTE:
8813 evpermb(dst, mask, nds, src, merge, vector_len); break;
8814 case T_CHAR:
8815 case T_SHORT:
8816 evpermw(dst, mask, nds, src, merge, vector_len); break;
8817 case T_INT:
8818 case T_FLOAT:
8819 evpermd(dst, mask, nds, src, merge, vector_len); break;
8820 case T_LONG:
8821 case T_DOUBLE:
8822 evpermq(dst, mask, nds, src, merge, vector_len); break;
8823 default:
8824 fatal("Unexpected type argument %s", type2name(type)); break;
8825 }
8826 }
8827
8828 void MacroAssembler::evperm(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
8829 switch(type) {
8830 case T_BOOLEAN:
8831 case T_BYTE:
8832 evpermb(dst, mask, nds, src, merge, vector_len); break;
8833 case T_CHAR:
8834 case T_SHORT:
8835 evpermw(dst, mask, nds, src, merge, vector_len); break;
8836 case T_INT:
8837 case T_FLOAT:
8838 evpermd(dst, mask, nds, src, merge, vector_len); break;
8839 case T_LONG:
8840 case T_DOUBLE:
8841 evpermq(dst, mask, nds, src, merge, vector_len); break;
8842 default:
8843 fatal("Unexpected type argument %s", type2name(type)); break;
8844 }
8845 }
8846
8847 void MacroAssembler::evpminu(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
8848 switch(type) {
8849 case T_BYTE:
8850 evpminub(dst, mask, nds, src, merge, vector_len); break;
8851 case T_SHORT:
8852 evpminuw(dst, mask, nds, src, merge, vector_len); break;
8853 case T_INT:
8854 evpminud(dst, mask, nds, src, merge, vector_len); break;
8855 case T_LONG:
8856 evpminuq(dst, mask, nds, src, merge, vector_len); break;
8857 default:
8858 fatal("Unexpected type argument %s", type2name(type)); break;
8859 }
8860 }
8861
8862 void MacroAssembler::evpmaxu(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
8863 switch(type) {
8864 case T_BYTE:
8865 evpmaxub(dst, mask, nds, src, merge, vector_len); break;
8866 case T_SHORT:
8867 evpmaxuw(dst, mask, nds, src, merge, vector_len); break;
8868 case T_INT:
8869 evpmaxud(dst, mask, nds, src, merge, vector_len); break;
8870 case T_LONG:
8871 evpmaxuq(dst, mask, nds, src, merge, vector_len); break;
8872 default:
8873 fatal("Unexpected type argument %s", type2name(type)); break;
8874 }
8875 }
8876
8877 void MacroAssembler::evpminu(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
8878 switch(type) {
8879 case T_BYTE:
8880 evpminub(dst, mask, nds, src, merge, vector_len); break;
8881 case T_SHORT:
8882 evpminuw(dst, mask, nds, src, merge, vector_len); break;
8883 case T_INT:
8884 evpminud(dst, mask, nds, src, merge, vector_len); break;
8885 case T_LONG:
8886 evpminuq(dst, mask, nds, src, merge, vector_len); break;
8887 default:
8888 fatal("Unexpected type argument %s", type2name(type)); break;
8889 }
8890 }
8891
8892 void MacroAssembler::evpmaxu(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
8893 switch(type) {
8894 case T_BYTE:
8895 evpmaxub(dst, mask, nds, src, merge, vector_len); break;
8896 case T_SHORT:
8897 evpmaxuw(dst, mask, nds, src, merge, vector_len); break;
8898 case T_INT:
8899 evpmaxud(dst, mask, nds, src, merge, vector_len); break;
8900 case T_LONG:
8901 evpmaxuq(dst, mask, nds, src, merge, vector_len); break;
8902 default:
8903 fatal("Unexpected type argument %s", type2name(type)); break;
8904 }
8905 }
8906
8907 void MacroAssembler::evpmins(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
8908 switch(type) {
8909 case T_BYTE:
8910 evpminsb(dst, mask, nds, src, merge, vector_len); break;
8911 case T_SHORT:
8912 evpminsw(dst, mask, nds, src, merge, vector_len); break;
8913 case T_INT:
8914 evpminsd(dst, mask, nds, src, merge, vector_len); break;
8915 case T_LONG:
8916 evpminsq(dst, mask, nds, src, merge, vector_len); break;
8917 case T_FLOAT:
8918 evminmaxps(dst, mask, nds, src, merge, AVX10_MINMAX_MIN_COMPARE_SIGN, vector_len); break;
8919 case T_DOUBLE:
8920 evminmaxpd(dst, mask, nds, src, merge, AVX10_MINMAX_MIN_COMPARE_SIGN, vector_len); break;
8921 default:
8922 fatal("Unexpected type argument %s", type2name(type)); break;
8923 }
8924 }
8925
8926 void MacroAssembler::evpmaxs(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
8927 switch(type) {
8928 case T_BYTE:
8929 evpmaxsb(dst, mask, nds, src, merge, vector_len); break;
8930 case T_SHORT:
8931 evpmaxsw(dst, mask, nds, src, merge, vector_len); break;
8932 case T_INT:
8933 evpmaxsd(dst, mask, nds, src, merge, vector_len); break;
8934 case T_LONG:
8935 evpmaxsq(dst, mask, nds, src, merge, vector_len); break;
8936 case T_FLOAT:
8937 evminmaxps(dst, mask, nds, src, merge, AVX10_MINMAX_MAX_COMPARE_SIGN, vector_len); break;
8938 case T_DOUBLE:
8939 evminmaxpd(dst, mask, nds, src, merge, AVX10_MINMAX_MAX_COMPARE_SIGN, vector_len); break;
8940 default:
8941 fatal("Unexpected type argument %s", type2name(type)); break;
8942 }
8943 }
8944
8945 void MacroAssembler::evpmins(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
8946 switch(type) {
8947 case T_BYTE:
8948 evpminsb(dst, mask, nds, src, merge, vector_len); break;
8949 case T_SHORT:
8950 evpminsw(dst, mask, nds, src, merge, vector_len); break;
8951 case T_INT:
8952 evpminsd(dst, mask, nds, src, merge, vector_len); break;
8953 case T_LONG:
8954 evpminsq(dst, mask, nds, src, merge, vector_len); break;
8955 case T_FLOAT:
8956 evminmaxps(dst, mask, nds, src, merge, AVX10_MINMAX_MIN_COMPARE_SIGN, vector_len); break;
8957 case T_DOUBLE:
8958 evminmaxpd(dst, mask, nds, src, merge, AVX10_MINMAX_MIN_COMPARE_SIGN, vector_len); break;
8959 default:
8960 fatal("Unexpected type argument %s", type2name(type)); break;
8961 }
8962 }
8963
8964 void MacroAssembler::evpmaxs(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
8965 switch(type) {
8966 case T_BYTE:
8967 evpmaxsb(dst, mask, nds, src, merge, vector_len); break;
8968 case T_SHORT:
8969 evpmaxsw(dst, mask, nds, src, merge, vector_len); break;
8970 case T_INT:
8971 evpmaxsd(dst, mask, nds, src, merge, vector_len); break;
8972 case T_LONG:
8973 evpmaxsq(dst, mask, nds, src, merge, vector_len); break;
8974 case T_FLOAT:
8975 evminmaxps(dst, mask, nds, src, merge, AVX10_MINMAX_MAX_COMPARE_SIGN, vector_len); break;
8976 case T_DOUBLE:
8977 evminmaxps(dst, mask, nds, src, merge, AVX10_MINMAX_MAX_COMPARE_SIGN, vector_len); break;
8978 default:
8979 fatal("Unexpected type argument %s", type2name(type)); break;
8980 }
8981 }
8982
8983 void MacroAssembler::evxor(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
8984 switch(type) {
8985 case T_INT:
8986 evpxord(dst, mask, nds, src, merge, vector_len); break;
8987 case T_LONG:
8988 evpxorq(dst, mask, nds, src, merge, vector_len); break;
8989 default:
8990 fatal("Unexpected type argument %s", type2name(type)); break;
8991 }
8992 }
8993
8994 void MacroAssembler::evxor(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
8995 switch(type) {
8996 case T_INT:
8997 evpxord(dst, mask, nds, src, merge, vector_len); break;
8998 case T_LONG:
8999 evpxorq(dst, mask, nds, src, merge, vector_len); break;
9000 default:
9001 fatal("Unexpected type argument %s", type2name(type)); break;
9002 }
9003 }
9004
9005 void MacroAssembler::evor(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
9006 switch(type) {
9007 case T_INT:
9008 Assembler::evpord(dst, mask, nds, src, merge, vector_len); break;
9009 case T_LONG:
9010 evporq(dst, mask, nds, src, merge, vector_len); break;
9011 default:
9012 fatal("Unexpected type argument %s", type2name(type)); break;
9013 }
9014 }
9015
9016 void MacroAssembler::evor(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
9017 switch(type) {
9018 case T_INT:
9019 Assembler::evpord(dst, mask, nds, src, merge, vector_len); break;
9020 case T_LONG:
9021 evporq(dst, mask, nds, src, merge, vector_len); break;
9022 default:
9023 fatal("Unexpected type argument %s", type2name(type)); break;
9024 }
9025 }
9026
9027 void MacroAssembler::evand(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
9028 switch(type) {
9029 case T_INT:
9030 evpandd(dst, mask, nds, src, merge, vector_len); break;
9031 case T_LONG:
9032 evpandq(dst, mask, nds, src, merge, vector_len); break;
9033 default:
9034 fatal("Unexpected type argument %s", type2name(type)); break;
9035 }
9036 }
9037
9038 void MacroAssembler::evand(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
9039 switch(type) {
9040 case T_INT:
9041 evpandd(dst, mask, nds, src, merge, vector_len); break;
9042 case T_LONG:
9043 evpandq(dst, mask, nds, src, merge, vector_len); break;
9044 default:
9045 fatal("Unexpected type argument %s", type2name(type)); break;
9046 }
9047 }
9048
9049 void MacroAssembler::kortest(uint masklen, KRegister src1, KRegister src2) {
9050 switch(masklen) {
9051 case 8:
9052 kortestbl(src1, src2);
9053 break;
9054 case 16:
9055 kortestwl(src1, src2);
9056 break;
9057 case 32:
9058 kortestdl(src1, src2);
9059 break;
9060 case 64:
9061 kortestql(src1, src2);
9062 break;
9063 default:
9064 fatal("Unexpected mask length %d", masklen);
9065 break;
9066 }
9067 }
9068
9069
9070 void MacroAssembler::ktest(uint masklen, KRegister src1, KRegister src2) {
9071 switch(masklen) {
9072 case 8:
9073 ktestbl(src1, src2);
9074 break;
9075 case 16:
9076 ktestwl(src1, src2);
9077 break;
9078 case 32:
9079 ktestdl(src1, src2);
9080 break;
9081 case 64:
9082 ktestql(src1, src2);
9083 break;
9084 default:
9085 fatal("Unexpected mask length %d", masklen);
9086 break;
9087 }
9088 }
9089
9090 void MacroAssembler::evrold(BasicType type, XMMRegister dst, KRegister mask, XMMRegister src, int shift, bool merge, int vlen_enc) {
9091 switch(type) {
9092 case T_INT:
9093 evprold(dst, mask, src, shift, merge, vlen_enc); break;
9094 case T_LONG:
9095 evprolq(dst, mask, src, shift, merge, vlen_enc); break;
9096 default:
9097 fatal("Unexpected type argument %s", type2name(type)); break;
9098 break;
9099 }
9100 }
9101
9102 void MacroAssembler::evrord(BasicType type, XMMRegister dst, KRegister mask, XMMRegister src, int shift, bool merge, int vlen_enc) {
9103 switch(type) {
9104 case T_INT:
9105 evprord(dst, mask, src, shift, merge, vlen_enc); break;
9106 case T_LONG:
9107 evprorq(dst, mask, src, shift, merge, vlen_enc); break;
9108 default:
9109 fatal("Unexpected type argument %s", type2name(type)); break;
9110 }
9111 }
9112
9113 void MacroAssembler::evrold(BasicType type, XMMRegister dst, KRegister mask, XMMRegister src1, XMMRegister src2, bool merge, int vlen_enc) {
9114 switch(type) {
9115 case T_INT:
9116 evprolvd(dst, mask, src1, src2, merge, vlen_enc); break;
9117 case T_LONG:
9118 evprolvq(dst, mask, src1, src2, merge, vlen_enc); break;
9119 default:
9120 fatal("Unexpected type argument %s", type2name(type)); break;
9121 }
9122 }
9123
9124 void MacroAssembler::evrord(BasicType type, XMMRegister dst, KRegister mask, XMMRegister src1, XMMRegister src2, bool merge, int vlen_enc) {
9125 switch(type) {
9126 case T_INT:
9127 evprorvd(dst, mask, src1, src2, merge, vlen_enc); break;
9128 case T_LONG:
9129 evprorvq(dst, mask, src1, src2, merge, vlen_enc); break;
9130 default:
9131 fatal("Unexpected type argument %s", type2name(type)); break;
9132 }
9133 }
9134
9135 void MacroAssembler::evpandq(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
9136 assert(rscratch != noreg || always_reachable(src), "missing");
9137
9138 if (reachable(src)) {
9139 evpandq(dst, nds, as_Address(src), vector_len);
9140 } else {
9141 lea(rscratch, src);
9142 evpandq(dst, nds, Address(rscratch, 0), vector_len);
9143 }
9144 }
9145
9146 void MacroAssembler::evpaddq(XMMRegister dst, KRegister mask, XMMRegister nds, AddressLiteral src, bool merge, int vector_len, Register rscratch) {
9147 assert(rscratch != noreg || always_reachable(src), "missing");
9148
9149 if (reachable(src)) {
9150 Assembler::evpaddq(dst, mask, nds, as_Address(src), merge, vector_len);
9151 } else {
9152 lea(rscratch, src);
9153 Assembler::evpaddq(dst, mask, nds, Address(rscratch, 0), merge, vector_len);
9154 }
9155 }
9156
9157 void MacroAssembler::evporq(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
9158 assert(rscratch != noreg || always_reachable(src), "missing");
9159
9160 if (reachable(src)) {
9161 evporq(dst, nds, as_Address(src), vector_len);
9162 } else {
9163 lea(rscratch, src);
9164 evporq(dst, nds, Address(rscratch, 0), vector_len);
9165 }
9166 }
9167
9168 void MacroAssembler::vpshufb(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
9169 assert(rscratch != noreg || always_reachable(src), "missing");
9170
9171 if (reachable(src)) {
9172 vpshufb(dst, nds, as_Address(src), vector_len);
9173 } else {
9174 lea(rscratch, src);
9175 vpshufb(dst, nds, Address(rscratch, 0), vector_len);
9176 }
9177 }
9178
9179 void MacroAssembler::vpor(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
9180 assert(rscratch != noreg || always_reachable(src), "missing");
9181
9182 if (reachable(src)) {
9183 Assembler::vpor(dst, nds, as_Address(src), vector_len);
9184 } else {
9185 lea(rscratch, src);
9186 Assembler::vpor(dst, nds, Address(rscratch, 0), vector_len);
9187 }
9188 }
9189
9190 void MacroAssembler::vpternlogq(XMMRegister dst, int imm8, XMMRegister src2, AddressLiteral src3, int vector_len, Register rscratch) {
9191 assert(rscratch != noreg || always_reachable(src3), "missing");
9192
9193 if (reachable(src3)) {
9194 vpternlogq(dst, imm8, src2, as_Address(src3), vector_len);
9195 } else {
9196 lea(rscratch, src3);
9197 vpternlogq(dst, imm8, src2, Address(rscratch, 0), vector_len);
9198 }
9199 }
9200
9201 #if COMPILER2_OR_JVMCI
9202
9203 void MacroAssembler::fill_masked(BasicType bt, Address dst, XMMRegister xmm, KRegister mask,
9204 Register length, Register temp, int vec_enc) {
9205 // Computing mask for predicated vector store.
9206 movptr(temp, -1);
9207 bzhiq(temp, temp, length);
9208 kmov(mask, temp);
9209 evmovdqu(bt, mask, dst, xmm, true, vec_enc);
9210 }
9211
9212 // Set memory operation for length "less than" 64 bytes.
9213 void MacroAssembler::fill64_masked(uint shift, Register dst, int disp,
9214 XMMRegister xmm, KRegister mask, Register length,
9215 Register temp, bool use64byteVector) {
9216 assert(MaxVectorSize >= 32, "vector length should be >= 32");
9217 const BasicType type[] = { T_BYTE, T_SHORT, T_INT, T_LONG};
9218 if (!use64byteVector) {
9219 fill32(dst, disp, xmm);
9220 subptr(length, 32 >> shift);
9221 fill32_masked(shift, dst, disp + 32, xmm, mask, length, temp);
9222 } else {
9223 assert(MaxVectorSize == 64, "vector length != 64");
9224 fill_masked(type[shift], Address(dst, disp), xmm, mask, length, temp, Assembler::AVX_512bit);
9225 }
9226 }
9227
9228
9229 void MacroAssembler::fill32_masked(uint shift, Register dst, int disp,
9230 XMMRegister xmm, KRegister mask, Register length,
9231 Register temp) {
9232 assert(MaxVectorSize >= 32, "vector length should be >= 32");
9233 const BasicType type[] = { T_BYTE, T_SHORT, T_INT, T_LONG};
9234 fill_masked(type[shift], Address(dst, disp), xmm, mask, length, temp, Assembler::AVX_256bit);
9235 }
9236
9237
9238 void MacroAssembler::fill32(Address dst, XMMRegister xmm) {
9239 assert(MaxVectorSize >= 32, "vector length should be >= 32");
9240 vmovdqu(dst, xmm);
9241 }
9242
9243 void MacroAssembler::fill32(Register dst, int disp, XMMRegister xmm) {
9244 fill32(Address(dst, disp), xmm);
9245 }
9246
9247 void MacroAssembler::fill64(Address dst, XMMRegister xmm, bool use64byteVector) {
9248 assert(MaxVectorSize >= 32, "vector length should be >= 32");
9249 if (!use64byteVector) {
9250 fill32(dst, xmm);
9251 fill32(dst.plus_disp(32), xmm);
9252 } else {
9253 evmovdquq(dst, xmm, Assembler::AVX_512bit);
9254 }
9255 }
9256
9257 void MacroAssembler::fill64(Register dst, int disp, XMMRegister xmm, bool use64byteVector) {
9258 fill64(Address(dst, disp), xmm, use64byteVector);
9259 }
9260
9261 void MacroAssembler::generate_fill_avx3(BasicType type, Register to, Register value,
9262 Register count, Register rtmp, XMMRegister xtmp) {
9263 Label L_exit;
9264 Label L_fill_start;
9265 Label L_fill_64_bytes;
9266 Label L_fill_96_bytes;
9267 Label L_fill_128_bytes;
9268 Label L_fill_128_bytes_loop;
9269 Label L_fill_128_loop_header;
9270 Label L_fill_128_bytes_loop_header;
9271 Label L_fill_128_bytes_loop_pre_header;
9272 Label L_fill_zmm_sequence;
9273
9274 int shift = -1;
9275 int avx3threshold = VM_Version::avx3_threshold();
9276 switch(type) {
9277 case T_BYTE: shift = 0;
9278 break;
9279 case T_SHORT: shift = 1;
9280 break;
9281 case T_INT: shift = 2;
9282 break;
9283 /* Uncomment when LONG fill stubs are supported.
9284 case T_LONG: shift = 3;
9285 break;
9286 */
9287 default:
9288 fatal("Unhandled type: %s\n", type2name(type));
9289 }
9290
9291 if ((avx3threshold != 0) || (MaxVectorSize == 32)) {
9292
9293 if (MaxVectorSize == 64) {
9294 cmpq(count, avx3threshold >> shift);
9295 jcc(Assembler::greater, L_fill_zmm_sequence);
9296 }
9297
9298 evpbroadcast(type, xtmp, value, Assembler::AVX_256bit);
9299
9300 bind(L_fill_start);
9301
9302 cmpq(count, 32 >> shift);
9303 jccb(Assembler::greater, L_fill_64_bytes);
9304 fill32_masked(shift, to, 0, xtmp, k2, count, rtmp);
9305 jmp(L_exit);
9306
9307 bind(L_fill_64_bytes);
9308 cmpq(count, 64 >> shift);
9309 jccb(Assembler::greater, L_fill_96_bytes);
9310 fill64_masked(shift, to, 0, xtmp, k2, count, rtmp);
9311 jmp(L_exit);
9312
9313 bind(L_fill_96_bytes);
9314 cmpq(count, 96 >> shift);
9315 jccb(Assembler::greater, L_fill_128_bytes);
9316 fill64(to, 0, xtmp);
9317 subq(count, 64 >> shift);
9318 fill32_masked(shift, to, 64, xtmp, k2, count, rtmp);
9319 jmp(L_exit);
9320
9321 bind(L_fill_128_bytes);
9322 cmpq(count, 128 >> shift);
9323 jccb(Assembler::greater, L_fill_128_bytes_loop_pre_header);
9324 fill64(to, 0, xtmp);
9325 fill32(to, 64, xtmp);
9326 subq(count, 96 >> shift);
9327 fill32_masked(shift, to, 96, xtmp, k2, count, rtmp);
9328 jmp(L_exit);
9329
9330 bind(L_fill_128_bytes_loop_pre_header);
9331 {
9332 mov(rtmp, to);
9333 andq(rtmp, 31);
9334 jccb(Assembler::zero, L_fill_128_bytes_loop_header);
9335 negq(rtmp);
9336 addq(rtmp, 32);
9337 mov64(r8, -1L);
9338 bzhiq(r8, r8, rtmp);
9339 kmovql(k2, r8);
9340 evmovdqu(T_BYTE, k2, Address(to, 0), xtmp, true, Assembler::AVX_256bit);
9341 addq(to, rtmp);
9342 shrq(rtmp, shift);
9343 subq(count, rtmp);
9344 }
9345
9346 cmpq(count, 128 >> shift);
9347 jcc(Assembler::less, L_fill_start);
9348
9349 bind(L_fill_128_bytes_loop_header);
9350 subq(count, 128 >> shift);
9351
9352 align32();
9353 bind(L_fill_128_bytes_loop);
9354 fill64(to, 0, xtmp);
9355 fill64(to, 64, xtmp);
9356 addq(to, 128);
9357 subq(count, 128 >> shift);
9358 jccb(Assembler::greaterEqual, L_fill_128_bytes_loop);
9359
9360 addq(count, 128 >> shift);
9361 jcc(Assembler::zero, L_exit);
9362 jmp(L_fill_start);
9363 }
9364
9365 if (MaxVectorSize == 64) {
9366 // Sequence using 64 byte ZMM register.
9367 Label L_fill_128_bytes_zmm;
9368 Label L_fill_192_bytes_zmm;
9369 Label L_fill_192_bytes_loop_zmm;
9370 Label L_fill_192_bytes_loop_header_zmm;
9371 Label L_fill_192_bytes_loop_pre_header_zmm;
9372 Label L_fill_start_zmm_sequence;
9373
9374 bind(L_fill_zmm_sequence);
9375 evpbroadcast(type, xtmp, value, Assembler::AVX_512bit);
9376
9377 bind(L_fill_start_zmm_sequence);
9378 cmpq(count, 64 >> shift);
9379 jccb(Assembler::greater, L_fill_128_bytes_zmm);
9380 fill64_masked(shift, to, 0, xtmp, k2, count, rtmp, true);
9381 jmp(L_exit);
9382
9383 bind(L_fill_128_bytes_zmm);
9384 cmpq(count, 128 >> shift);
9385 jccb(Assembler::greater, L_fill_192_bytes_zmm);
9386 fill64(to, 0, xtmp, true);
9387 subq(count, 64 >> shift);
9388 fill64_masked(shift, to, 64, xtmp, k2, count, rtmp, true);
9389 jmp(L_exit);
9390
9391 bind(L_fill_192_bytes_zmm);
9392 cmpq(count, 192 >> shift);
9393 jccb(Assembler::greater, L_fill_192_bytes_loop_pre_header_zmm);
9394 fill64(to, 0, xtmp, true);
9395 fill64(to, 64, xtmp, true);
9396 subq(count, 128 >> shift);
9397 fill64_masked(shift, to, 128, xtmp, k2, count, rtmp, true);
9398 jmp(L_exit);
9399
9400 bind(L_fill_192_bytes_loop_pre_header_zmm);
9401 {
9402 movq(rtmp, to);
9403 andq(rtmp, 63);
9404 jccb(Assembler::zero, L_fill_192_bytes_loop_header_zmm);
9405 negq(rtmp);
9406 addq(rtmp, 64);
9407 mov64(r8, -1L);
9408 bzhiq(r8, r8, rtmp);
9409 kmovql(k2, r8);
9410 evmovdqu(T_BYTE, k2, Address(to, 0), xtmp, true, Assembler::AVX_512bit);
9411 addq(to, rtmp);
9412 shrq(rtmp, shift);
9413 subq(count, rtmp);
9414 }
9415
9416 cmpq(count, 192 >> shift);
9417 jcc(Assembler::less, L_fill_start_zmm_sequence);
9418
9419 bind(L_fill_192_bytes_loop_header_zmm);
9420 subq(count, 192 >> shift);
9421
9422 align32();
9423 bind(L_fill_192_bytes_loop_zmm);
9424 fill64(to, 0, xtmp, true);
9425 fill64(to, 64, xtmp, true);
9426 fill64(to, 128, xtmp, true);
9427 addq(to, 192);
9428 subq(count, 192 >> shift);
9429 jccb(Assembler::greaterEqual, L_fill_192_bytes_loop_zmm);
9430
9431 addq(count, 192 >> shift);
9432 jcc(Assembler::zero, L_exit);
9433 jmp(L_fill_start_zmm_sequence);
9434 }
9435 bind(L_exit);
9436 }
9437 #endif //COMPILER2_OR_JVMCI
9438
9439
9440 void MacroAssembler::convert_f2i(Register dst, XMMRegister src) {
9441 Label done;
9442 cvttss2sil(dst, src);
9443 // Conversion instructions do not match JLS for overflow, underflow and NaN -> fixup in stub
9444 cmpl(dst, 0x80000000); // float_sign_flip
9445 jccb(Assembler::notEqual, done);
9446 subptr(rsp, 8);
9447 movflt(Address(rsp, 0), src);
9448 call(RuntimeAddress(CAST_FROM_FN_PTR(address, StubRoutines::x86::f2i_fixup())));
9449 pop(dst);
9450 bind(done);
9451 }
9452
9453 void MacroAssembler::convert_d2i(Register dst, XMMRegister src) {
9454 Label done;
9455 cvttsd2sil(dst, src);
9456 // Conversion instructions do not match JLS for overflow, underflow and NaN -> fixup in stub
9457 cmpl(dst, 0x80000000); // float_sign_flip
9458 jccb(Assembler::notEqual, done);
9459 subptr(rsp, 8);
9460 movdbl(Address(rsp, 0), src);
9461 call(RuntimeAddress(CAST_FROM_FN_PTR(address, StubRoutines::x86::d2i_fixup())));
9462 pop(dst);
9463 bind(done);
9464 }
9465
9466 void MacroAssembler::convert_f2l(Register dst, XMMRegister src) {
9467 Label done;
9468 cvttss2siq(dst, src);
9469 cmp64(dst, ExternalAddress((address) StubRoutines::x86::double_sign_flip()));
9470 jccb(Assembler::notEqual, done);
9471 subptr(rsp, 8);
9472 movflt(Address(rsp, 0), src);
9473 call(RuntimeAddress(CAST_FROM_FN_PTR(address, StubRoutines::x86::f2l_fixup())));
9474 pop(dst);
9475 bind(done);
9476 }
9477
9478 void MacroAssembler::round_float(Register dst, XMMRegister src, Register rtmp, Register rcx) {
9479 // Following code is line by line assembly translation rounding algorithm.
9480 // Please refer to java.lang.Math.round(float) algorithm for details.
9481 const int32_t FloatConsts_EXP_BIT_MASK = 0x7F800000;
9482 const int32_t FloatConsts_SIGNIFICAND_WIDTH = 24;
9483 const int32_t FloatConsts_EXP_BIAS = 127;
9484 const int32_t FloatConsts_SIGNIF_BIT_MASK = 0x007FFFFF;
9485 const int32_t MINUS_32 = 0xFFFFFFE0;
9486 Label L_special_case, L_block1, L_exit;
9487 movl(rtmp, FloatConsts_EXP_BIT_MASK);
9488 movdl(dst, src);
9489 andl(dst, rtmp);
9490 sarl(dst, FloatConsts_SIGNIFICAND_WIDTH - 1);
9491 movl(rtmp, FloatConsts_SIGNIFICAND_WIDTH - 2 + FloatConsts_EXP_BIAS);
9492 subl(rtmp, dst);
9493 movl(rcx, rtmp);
9494 movl(dst, MINUS_32);
9495 testl(rtmp, dst);
9496 jccb(Assembler::notEqual, L_special_case);
9497 movdl(dst, src);
9498 andl(dst, FloatConsts_SIGNIF_BIT_MASK);
9499 orl(dst, FloatConsts_SIGNIF_BIT_MASK + 1);
9500 movdl(rtmp, src);
9501 testl(rtmp, rtmp);
9502 jccb(Assembler::greaterEqual, L_block1);
9503 negl(dst);
9504 bind(L_block1);
9505 sarl(dst);
9506 addl(dst, 0x1);
9507 sarl(dst, 0x1);
9508 jmp(L_exit);
9509 bind(L_special_case);
9510 convert_f2i(dst, src);
9511 bind(L_exit);
9512 }
9513
9514 void MacroAssembler::round_double(Register dst, XMMRegister src, Register rtmp, Register rcx) {
9515 // Following code is line by line assembly translation rounding algorithm.
9516 // Please refer to java.lang.Math.round(double) algorithm for details.
9517 const int64_t DoubleConsts_EXP_BIT_MASK = 0x7FF0000000000000L;
9518 const int64_t DoubleConsts_SIGNIFICAND_WIDTH = 53;
9519 const int64_t DoubleConsts_EXP_BIAS = 1023;
9520 const int64_t DoubleConsts_SIGNIF_BIT_MASK = 0x000FFFFFFFFFFFFFL;
9521 const int64_t MINUS_64 = 0xFFFFFFFFFFFFFFC0L;
9522 Label L_special_case, L_block1, L_exit;
9523 mov64(rtmp, DoubleConsts_EXP_BIT_MASK);
9524 movq(dst, src);
9525 andq(dst, rtmp);
9526 sarq(dst, DoubleConsts_SIGNIFICAND_WIDTH - 1);
9527 mov64(rtmp, DoubleConsts_SIGNIFICAND_WIDTH - 2 + DoubleConsts_EXP_BIAS);
9528 subq(rtmp, dst);
9529 movq(rcx, rtmp);
9530 mov64(dst, MINUS_64);
9531 testq(rtmp, dst);
9532 jccb(Assembler::notEqual, L_special_case);
9533 movq(dst, src);
9534 mov64(rtmp, DoubleConsts_SIGNIF_BIT_MASK);
9535 andq(dst, rtmp);
9536 mov64(rtmp, DoubleConsts_SIGNIF_BIT_MASK + 1);
9537 orq(dst, rtmp);
9538 movq(rtmp, src);
9539 testq(rtmp, rtmp);
9540 jccb(Assembler::greaterEqual, L_block1);
9541 negq(dst);
9542 bind(L_block1);
9543 sarq(dst);
9544 addq(dst, 0x1);
9545 sarq(dst, 0x1);
9546 jmp(L_exit);
9547 bind(L_special_case);
9548 convert_d2l(dst, src);
9549 bind(L_exit);
9550 }
9551
9552 void MacroAssembler::convert_d2l(Register dst, XMMRegister src) {
9553 Label done;
9554 cvttsd2siq(dst, src);
9555 cmp64(dst, ExternalAddress((address) StubRoutines::x86::double_sign_flip()));
9556 jccb(Assembler::notEqual, done);
9557 subptr(rsp, 8);
9558 movdbl(Address(rsp, 0), src);
9559 call(RuntimeAddress(CAST_FROM_FN_PTR(address, StubRoutines::x86::d2l_fixup())));
9560 pop(dst);
9561 bind(done);
9562 }
9563
9564 void MacroAssembler::cache_wb(Address line)
9565 {
9566 // 64 bit cpus always support clflush
9567 assert(VM_Version::supports_clflush(), "clflush should be available");
9568 bool optimized = VM_Version::supports_clflushopt();
9569 bool no_evict = VM_Version::supports_clwb();
9570
9571 // prefer clwb (writeback without evict) otherwise
9572 // prefer clflushopt (potentially parallel writeback with evict)
9573 // otherwise fallback on clflush (serial writeback with evict)
9574
9575 if (optimized) {
9576 if (no_evict) {
9577 clwb(line);
9578 } else {
9579 clflushopt(line);
9580 }
9581 } else {
9582 // no need for fence when using CLFLUSH
9583 clflush(line);
9584 }
9585 }
9586
9587 void MacroAssembler::cache_wbsync(bool is_pre)
9588 {
9589 assert(VM_Version::supports_clflush(), "clflush should be available");
9590 bool optimized = VM_Version::supports_clflushopt();
9591 bool no_evict = VM_Version::supports_clwb();
9592
9593 // pick the correct implementation
9594
9595 if (!is_pre && (optimized || no_evict)) {
9596 // need an sfence for post flush when using clflushopt or clwb
9597 // otherwise no no need for any synchroniaztion
9598
9599 sfence();
9600 }
9601 }
9602
9603 Assembler::Condition MacroAssembler::negate_condition(Assembler::Condition cond) {
9604 switch (cond) {
9605 // Note some conditions are synonyms for others
9606 case Assembler::zero: return Assembler::notZero;
9607 case Assembler::notZero: return Assembler::zero;
9608 case Assembler::less: return Assembler::greaterEqual;
9609 case Assembler::lessEqual: return Assembler::greater;
9610 case Assembler::greater: return Assembler::lessEqual;
9611 case Assembler::greaterEqual: return Assembler::less;
9612 case Assembler::below: return Assembler::aboveEqual;
9613 case Assembler::belowEqual: return Assembler::above;
9614 case Assembler::above: return Assembler::belowEqual;
9615 case Assembler::aboveEqual: return Assembler::below;
9616 case Assembler::overflow: return Assembler::noOverflow;
9617 case Assembler::noOverflow: return Assembler::overflow;
9618 case Assembler::negative: return Assembler::positive;
9619 case Assembler::positive: return Assembler::negative;
9620 case Assembler::parity: return Assembler::noParity;
9621 case Assembler::noParity: return Assembler::parity;
9622 }
9623 ShouldNotReachHere(); return Assembler::overflow;
9624 }
9625
9626 // This is simply a call to Thread::current()
9627 void MacroAssembler::get_thread_slow(Register thread) {
9628 if (thread != rax) {
9629 push(rax);
9630 }
9631 push(rdi);
9632 push(rsi);
9633 push(rdx);
9634 push(rcx);
9635 push(r8);
9636 push(r9);
9637 push(r10);
9638 push(r11);
9639
9640 MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, Thread::current), 0);
9641
9642 pop(r11);
9643 pop(r10);
9644 pop(r9);
9645 pop(r8);
9646 pop(rcx);
9647 pop(rdx);
9648 pop(rsi);
9649 pop(rdi);
9650 if (thread != rax) {
9651 mov(thread, rax);
9652 pop(rax);
9653 }
9654 }
9655
9656 void MacroAssembler::check_stack_alignment(Register sp, const char* msg, unsigned bias, Register tmp) {
9657 Label L_stack_ok;
9658 if (bias == 0) {
9659 testptr(sp, 2 * wordSize - 1);
9660 } else {
9661 // lea(tmp, Address(rsp, bias);
9662 mov(tmp, sp);
9663 addptr(tmp, bias);
9664 testptr(tmp, 2 * wordSize - 1);
9665 }
9666 jcc(Assembler::equal, L_stack_ok);
9667 block_comment(msg);
9668 stop(msg);
9669 bind(L_stack_ok);
9670 }
9671
9672 // Implements lightweight-locking.
9673 //
9674 // obj: the object to be locked
9675 // reg_rax: rax
9676 // thread: the thread which attempts to lock obj
9677 // tmp: a temporary register
9678 void MacroAssembler::lightweight_lock(Register basic_lock, Register obj, Register reg_rax, Register tmp, Label& slow) {
9679 Register thread = r15_thread;
9680
9681 assert(reg_rax == rax, "");
9682 assert_different_registers(basic_lock, obj, reg_rax, thread, tmp);
9683
9684 Label push;
9685 const Register top = tmp;
9686
9687 // Preload the markWord. It is important that this is the first
9688 // instruction emitted as it is part of C1's null check semantics.
9689 movptr(reg_rax, Address(obj, oopDesc::mark_offset_in_bytes()));
9690
9691 if (UseObjectMonitorTable) {
9692 // Clear cache in case fast locking succeeds or we need to take the slow-path.
9693 movptr(Address(basic_lock, BasicObjectLock::lock_offset() + in_ByteSize((BasicLock::object_monitor_cache_offset_in_bytes()))), 0);
9694 }
9695
9696 if (DiagnoseSyncOnValueBasedClasses != 0) {
9697 load_klass(tmp, obj, rscratch1);
9698 testb(Address(tmp, Klass::misc_flags_offset()), KlassFlags::_misc_is_value_based_class);
9699 jcc(Assembler::notZero, slow);
9700 }
9701
9702 // Load top.
9703 movl(top, Address(thread, JavaThread::lock_stack_top_offset()));
9704
9705 // Check if the lock-stack is full.
9706 cmpl(top, LockStack::end_offset());
9707 jcc(Assembler::greaterEqual, slow);
9708
9709 // Check for recursion.
9710 cmpptr(obj, Address(thread, top, Address::times_1, -oopSize));
9711 jcc(Assembler::equal, push);
9712
9713 // Check header for monitor (0b10).
9714 testptr(reg_rax, markWord::monitor_value);
9715 jcc(Assembler::notZero, slow);
9716
9717 // Try to lock. Transition lock bits 0b01 => 0b00
9718 movptr(tmp, reg_rax);
9719 andptr(tmp, ~(int32_t)markWord::unlocked_value);
9720 orptr(reg_rax, markWord::unlocked_value);
9721 lock(); cmpxchgptr(tmp, Address(obj, oopDesc::mark_offset_in_bytes()));
9722 jcc(Assembler::notEqual, slow);
9723
9724 // Restore top, CAS clobbers register.
9725 movl(top, Address(thread, JavaThread::lock_stack_top_offset()));
9726
9727 bind(push);
9728 // After successful lock, push object on lock-stack.
9729 movptr(Address(thread, top), obj);
9730 incrementl(top, oopSize);
9731 movl(Address(thread, JavaThread::lock_stack_top_offset()), top);
9732 }
9733
9734 // Implements lightweight-unlocking.
9735 //
9736 // obj: the object to be unlocked
9737 // reg_rax: rax
9738 // thread: the thread
9739 // tmp: a temporary register
9740 void MacroAssembler::lightweight_unlock(Register obj, Register reg_rax, Register tmp, Label& slow) {
9741 Register thread = r15_thread;
9742
9743 assert(reg_rax == rax, "");
9744 assert_different_registers(obj, reg_rax, thread, tmp);
9745
9746 Label unlocked, push_and_slow;
9747 const Register top = tmp;
9748
9749 // Check if obj is top of lock-stack.
9750 movl(top, Address(thread, JavaThread::lock_stack_top_offset()));
9751 cmpptr(obj, Address(thread, top, Address::times_1, -oopSize));
9752 jcc(Assembler::notEqual, slow);
9753
9754 // Pop lock-stack.
9755 DEBUG_ONLY(movptr(Address(thread, top, Address::times_1, -oopSize), 0);)
9756 subl(Address(thread, JavaThread::lock_stack_top_offset()), oopSize);
9757
9758 // Check if recursive.
9759 cmpptr(obj, Address(thread, top, Address::times_1, -2 * oopSize));
9760 jcc(Assembler::equal, unlocked);
9761
9762 // Not recursive. Check header for monitor (0b10).
9763 movptr(reg_rax, Address(obj, oopDesc::mark_offset_in_bytes()));
9764 testptr(reg_rax, markWord::monitor_value);
9765 jcc(Assembler::notZero, push_and_slow);
9766
9767 #ifdef ASSERT
9768 // Check header not unlocked (0b01).
9769 Label not_unlocked;
9770 testptr(reg_rax, markWord::unlocked_value);
9771 jcc(Assembler::zero, not_unlocked);
9772 stop("lightweight_unlock already unlocked");
9773 bind(not_unlocked);
9774 #endif
9775
9776 // Try to unlock. Transition lock bits 0b00 => 0b01
9777 movptr(tmp, reg_rax);
9778 orptr(tmp, markWord::unlocked_value);
9779 lock(); cmpxchgptr(tmp, Address(obj, oopDesc::mark_offset_in_bytes()));
9780 jcc(Assembler::equal, unlocked);
9781
9782 bind(push_and_slow);
9783 // Restore lock-stack and handle the unlock in runtime.
9784 #ifdef ASSERT
9785 movl(top, Address(thread, JavaThread::lock_stack_top_offset()));
9786 movptr(Address(thread, top), obj);
9787 #endif
9788 addl(Address(thread, JavaThread::lock_stack_top_offset()), oopSize);
9789 jmp(slow);
9790
9791 bind(unlocked);
9792 }
9793
9794 // Saves legacy GPRs state on stack.
9795 void MacroAssembler::save_legacy_gprs() {
9796 subq(rsp, 16 * wordSize);
9797 movq(Address(rsp, 15 * wordSize), rax);
9798 movq(Address(rsp, 14 * wordSize), rcx);
9799 movq(Address(rsp, 13 * wordSize), rdx);
9800 movq(Address(rsp, 12 * wordSize), rbx);
9801 movq(Address(rsp, 10 * wordSize), rbp);
9802 movq(Address(rsp, 9 * wordSize), rsi);
9803 movq(Address(rsp, 8 * wordSize), rdi);
9804 movq(Address(rsp, 7 * wordSize), r8);
9805 movq(Address(rsp, 6 * wordSize), r9);
9806 movq(Address(rsp, 5 * wordSize), r10);
9807 movq(Address(rsp, 4 * wordSize), r11);
9808 movq(Address(rsp, 3 * wordSize), r12);
9809 movq(Address(rsp, 2 * wordSize), r13);
9810 movq(Address(rsp, wordSize), r14);
9811 movq(Address(rsp, 0), r15);
9812 }
9813
9814 // Resotres back legacy GPRs state from stack.
9815 void MacroAssembler::restore_legacy_gprs() {
9816 movq(r15, Address(rsp, 0));
9817 movq(r14, Address(rsp, wordSize));
9818 movq(r13, Address(rsp, 2 * wordSize));
9819 movq(r12, Address(rsp, 3 * wordSize));
9820 movq(r11, Address(rsp, 4 * wordSize));
9821 movq(r10, Address(rsp, 5 * wordSize));
9822 movq(r9, Address(rsp, 6 * wordSize));
9823 movq(r8, Address(rsp, 7 * wordSize));
9824 movq(rdi, Address(rsp, 8 * wordSize));
9825 movq(rsi, Address(rsp, 9 * wordSize));
9826 movq(rbp, Address(rsp, 10 * wordSize));
9827 movq(rbx, Address(rsp, 12 * wordSize));
9828 movq(rdx, Address(rsp, 13 * wordSize));
9829 movq(rcx, Address(rsp, 14 * wordSize));
9830 movq(rax, Address(rsp, 15 * wordSize));
9831 addq(rsp, 16 * wordSize);
9832 }
9833
9834 void MacroAssembler::load_aotrc_address(Register reg, address a) {
9835 #if INCLUDE_CDS
9836 assert(AOTRuntimeConstants::contains(a), "address out of range for data area");
9837 if (AOTCodeCache::is_on_for_dump()) {
9838 // all aotrc field addresses should be registered in the AOTCodeCache address table
9839 lea(reg, ExternalAddress(a));
9840 } else {
9841 mov64(reg, (uint64_t)a);
9842 }
9843 #else
9844 ShouldNotReachHere();
9845 #endif
9846 }
9847
9848 void MacroAssembler::setcc(Assembler::Condition comparison, Register dst) {
9849 if (VM_Version::supports_apx_f()) {
9850 esetzucc(comparison, dst);
9851 } else {
9852 setb(comparison, dst);
9853 movzbl(dst, dst);
9854 }
9855 }