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::andpd(XMMRegister dst, AddressLiteral src, Register rscratch) {
799 // Used in sign-masking with aligned address.
800 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
801 assert(rscratch != noreg || always_reachable(src), "missing");
802
803 if (UseAVX > 2 &&
804 (!VM_Version::supports_avx512dq() || !VM_Version::supports_avx512vl()) &&
805 (dst->encoding() >= 16)) {
806 vpand(dst, dst, src, AVX_512bit, rscratch);
807 } else if (reachable(src)) {
808 Assembler::andpd(dst, as_Address(src));
809 } else {
810 lea(rscratch, src);
811 Assembler::andpd(dst, Address(rscratch, 0));
812 }
813 }
814
815 void MacroAssembler::andps(XMMRegister dst, AddressLiteral src, Register rscratch) {
816 // Used in sign-masking with aligned address.
817 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
818 assert(rscratch != noreg || always_reachable(src), "missing");
819
820 if (reachable(src)) {
821 Assembler::andps(dst, as_Address(src));
822 } else {
823 lea(rscratch, src);
824 Assembler::andps(dst, Address(rscratch, 0));
825 }
826 }
827
828 void MacroAssembler::andptr(Register dst, int32_t imm32) {
829 andq(dst, imm32);
830 }
831
832 void MacroAssembler::andq(Register dst, AddressLiteral src, Register rscratch) {
833 assert(rscratch != noreg || always_reachable(src), "missing");
834
835 if (reachable(src)) {
836 andq(dst, as_Address(src));
837 } else {
838 lea(rscratch, src);
839 andq(dst, Address(rscratch, 0));
840 }
841 }
842
843 void MacroAssembler::atomic_incl(Address counter_addr) {
844 lock();
845 incrementl(counter_addr);
846 }
847
848 void MacroAssembler::atomic_incl(AddressLiteral counter_addr, Register rscratch) {
849 assert(rscratch != noreg || always_reachable(counter_addr), "missing");
850
851 if (reachable(counter_addr)) {
852 atomic_incl(as_Address(counter_addr));
853 } else {
854 lea(rscratch, counter_addr);
855 atomic_incl(Address(rscratch, 0));
856 }
857 }
858
859 void MacroAssembler::atomic_incq(Address counter_addr) {
860 lock();
861 incrementq(counter_addr);
862 }
863
864 void MacroAssembler::atomic_incq(AddressLiteral counter_addr, Register rscratch) {
865 assert(rscratch != noreg || always_reachable(counter_addr), "missing");
866
867 if (reachable(counter_addr)) {
868 atomic_incq(as_Address(counter_addr));
869 } else {
870 lea(rscratch, counter_addr);
871 atomic_incq(Address(rscratch, 0));
872 }
873 }
874
875 // Writes to stack successive pages until offset reached to check for
876 // stack overflow + shadow pages. This clobbers tmp.
877 void MacroAssembler::bang_stack_size(Register size, Register tmp) {
878 movptr(tmp, rsp);
879 // Bang stack for total size given plus shadow page size.
880 // Bang one page at a time because large size can bang beyond yellow and
881 // red zones.
882 Label loop;
883 bind(loop);
884 movl(Address(tmp, (-(int)os::vm_page_size())), size );
885 subptr(tmp, (int)os::vm_page_size());
886 subl(size, (int)os::vm_page_size());
887 jcc(Assembler::greater, loop);
888
889 // Bang down shadow pages too.
890 // At this point, (tmp-0) is the last address touched, so don't
891 // touch it again. (It was touched as (tmp-pagesize) but then tmp
892 // was post-decremented.) Skip this address by starting at i=1, and
893 // touch a few more pages below. N.B. It is important to touch all
894 // the way down including all pages in the shadow zone.
895 for (int i = 1; i < ((int)StackOverflow::stack_shadow_zone_size() / (int)os::vm_page_size()); i++) {
896 // this could be any sized move but this is can be a debugging crumb
897 // so the bigger the better.
898 movptr(Address(tmp, (-i*(int)os::vm_page_size())), size );
899 }
900 }
901
902 void MacroAssembler::reserved_stack_check() {
903 // testing if reserved zone needs to be enabled
904 Label no_reserved_zone_enabling;
905
906 cmpptr(rsp, Address(r15_thread, JavaThread::reserved_stack_activation_offset()));
907 jcc(Assembler::below, no_reserved_zone_enabling);
908
909 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), r15_thread);
910 jump(RuntimeAddress(SharedRuntime::throw_delayed_StackOverflowError_entry()));
911 should_not_reach_here();
912
913 bind(no_reserved_zone_enabling);
914 }
915
916 void MacroAssembler::c2bool(Register x) {
917 // implements x == 0 ? 0 : 1
918 // note: must only look at least-significant byte of x
919 // since C-style booleans are stored in one byte
920 // only! (was bug)
921 andl(x, 0xFF);
922 setb(Assembler::notZero, x);
923 }
924
925 // Wouldn't need if AddressLiteral version had new name
926 void MacroAssembler::call(Label& L, relocInfo::relocType rtype) {
927 Assembler::call(L, rtype);
928 }
929
930 void MacroAssembler::call(Register entry) {
931 Assembler::call(entry);
932 }
933
934 void MacroAssembler::call(AddressLiteral entry, Register rscratch) {
935 assert(rscratch != noreg || always_reachable(entry), "missing");
936
937 if (reachable(entry)) {
938 Assembler::call_literal(entry.target(), entry.rspec());
939 } else {
940 lea(rscratch, entry);
941 Assembler::call(rscratch);
942 }
943 }
944
945 void MacroAssembler::ic_call(address entry, jint method_index) {
946 RelocationHolder rh = virtual_call_Relocation::spec(pc(), method_index);
947 // Needs full 64-bit immediate for later patching.
948 mov64(rax, (int64_t)Universe::non_oop_word());
949 call(AddressLiteral(entry, rh));
950 }
951
952 int MacroAssembler::ic_check_size() {
953 return UseCompactObjectHeaders ? 17 : 14;
954 }
955
956 int MacroAssembler::ic_check(int end_alignment) {
957 Register receiver = j_rarg0;
958 Register data = rax;
959 Register temp = rscratch1;
960
961 // The UEP of a code blob ensures that the VEP is padded. However, the padding of the UEP is placed
962 // before the inline cache check, so we don't have to execute any nop instructions when dispatching
963 // through the UEP, yet we can ensure that the VEP is aligned appropriately. That's why we align
964 // before the inline cache check here, and not after
965 align(end_alignment, offset() + ic_check_size());
966
967 int uep_offset = offset();
968
969 if (UseCompactObjectHeaders) {
970 load_narrow_klass_compact(temp, receiver);
971 cmpl(temp, Address(data, CompiledICData::speculated_klass_offset()));
972 } else if (UseCompressedClassPointers) {
973 movl(temp, Address(receiver, oopDesc::klass_offset_in_bytes()));
974 cmpl(temp, Address(data, CompiledICData::speculated_klass_offset()));
975 } else {
976 movptr(temp, Address(receiver, oopDesc::klass_offset_in_bytes()));
977 cmpptr(temp, Address(data, CompiledICData::speculated_klass_offset()));
978 }
979
980 // if inline cache check fails, then jump to runtime routine
981 jump_cc(Assembler::notEqual, RuntimeAddress(SharedRuntime::get_ic_miss_stub()));
982 assert((offset() % end_alignment) == 0, "Misaligned verified entry point (%d, %d, %d)", uep_offset, offset(), end_alignment);
983
984 return uep_offset;
985 }
986
987 void MacroAssembler::emit_static_call_stub() {
988 // Static stub relocation also tags the Method* in the code-stream.
989 mov_metadata(rbx, (Metadata*) nullptr); // Method is zapped till fixup time.
990 // This is recognized as unresolved by relocs/nativeinst/ic code.
991 jump(RuntimeAddress(pc()));
992 }
993
994 // Implementation of call_VM versions
995
996 void MacroAssembler::call_VM(Register oop_result,
997 address entry_point,
998 bool check_exceptions) {
999 Label C, E;
1000 call(C, relocInfo::none);
1001 jmp(E);
1002
1003 bind(C);
1004 call_VM_helper(oop_result, entry_point, 0, check_exceptions);
1005 ret(0);
1006
1007 bind(E);
1008 }
1009
1010 void MacroAssembler::call_VM(Register oop_result,
1011 address entry_point,
1012 Register arg_1,
1013 bool check_exceptions) {
1014 Label C, E;
1015 call(C, relocInfo::none);
1016 jmp(E);
1017
1018 bind(C);
1019 pass_arg1(this, arg_1);
1020 call_VM_helper(oop_result, entry_point, 1, 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 Register arg_2,
1030 bool check_exceptions) {
1031 Label C, E;
1032 call(C, relocInfo::none);
1033 jmp(E);
1034
1035 bind(C);
1036
1037 assert_different_registers(arg_1, c_rarg2);
1038
1039 pass_arg2(this, arg_2);
1040 pass_arg1(this, arg_1);
1041 call_VM_helper(oop_result, entry_point, 2, check_exceptions);
1042 ret(0);
1043
1044 bind(E);
1045 }
1046
1047 void MacroAssembler::call_VM(Register oop_result,
1048 address entry_point,
1049 Register arg_1,
1050 Register arg_2,
1051 Register arg_3,
1052 bool check_exceptions) {
1053 Label C, E;
1054 call(C, relocInfo::none);
1055 jmp(E);
1056
1057 bind(C);
1058
1059 assert_different_registers(arg_1, c_rarg2, c_rarg3);
1060 assert_different_registers(arg_2, c_rarg3);
1061 pass_arg3(this, arg_3);
1062 pass_arg2(this, arg_2);
1063 pass_arg1(this, arg_1);
1064 call_VM_helper(oop_result, entry_point, 3, check_exceptions);
1065 ret(0);
1066
1067 bind(E);
1068 }
1069
1070 void MacroAssembler::call_VM(Register oop_result,
1071 Register last_java_sp,
1072 address entry_point,
1073 int number_of_arguments,
1074 bool check_exceptions) {
1075 call_VM_base(oop_result, last_java_sp, entry_point, number_of_arguments, check_exceptions);
1076 }
1077
1078 void MacroAssembler::call_VM(Register oop_result,
1079 Register last_java_sp,
1080 address entry_point,
1081 Register arg_1,
1082 bool check_exceptions) {
1083 pass_arg1(this, arg_1);
1084 call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions);
1085 }
1086
1087 void MacroAssembler::call_VM(Register oop_result,
1088 Register last_java_sp,
1089 address entry_point,
1090 Register arg_1,
1091 Register arg_2,
1092 bool check_exceptions) {
1093
1094 assert_different_registers(arg_1, c_rarg2);
1095 pass_arg2(this, arg_2);
1096 pass_arg1(this, arg_1);
1097 call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions);
1098 }
1099
1100 void MacroAssembler::call_VM(Register oop_result,
1101 Register last_java_sp,
1102 address entry_point,
1103 Register arg_1,
1104 Register arg_2,
1105 Register arg_3,
1106 bool check_exceptions) {
1107 assert_different_registers(arg_1, c_rarg2, c_rarg3);
1108 assert_different_registers(arg_2, c_rarg3);
1109 pass_arg3(this, arg_3);
1110 pass_arg2(this, arg_2);
1111 pass_arg1(this, arg_1);
1112 call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions);
1113 }
1114
1115 void MacroAssembler::super_call_VM(Register oop_result,
1116 Register last_java_sp,
1117 address entry_point,
1118 int number_of_arguments,
1119 bool check_exceptions) {
1120 MacroAssembler::call_VM_base(oop_result, last_java_sp, entry_point, number_of_arguments, check_exceptions);
1121 }
1122
1123 void MacroAssembler::super_call_VM(Register oop_result,
1124 Register last_java_sp,
1125 address entry_point,
1126 Register arg_1,
1127 bool check_exceptions) {
1128 pass_arg1(this, arg_1);
1129 super_call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions);
1130 }
1131
1132 void MacroAssembler::super_call_VM(Register oop_result,
1133 Register last_java_sp,
1134 address entry_point,
1135 Register arg_1,
1136 Register arg_2,
1137 bool check_exceptions) {
1138
1139 assert_different_registers(arg_1, c_rarg2);
1140 pass_arg2(this, arg_2);
1141 pass_arg1(this, arg_1);
1142 super_call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions);
1143 }
1144
1145 void MacroAssembler::super_call_VM(Register oop_result,
1146 Register last_java_sp,
1147 address entry_point,
1148 Register arg_1,
1149 Register arg_2,
1150 Register arg_3,
1151 bool check_exceptions) {
1152 assert_different_registers(arg_1, c_rarg2, c_rarg3);
1153 assert_different_registers(arg_2, c_rarg3);
1154 pass_arg3(this, arg_3);
1155 pass_arg2(this, arg_2);
1156 pass_arg1(this, arg_1);
1157 super_call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions);
1158 }
1159
1160 void MacroAssembler::call_VM_base(Register oop_result,
1161 Register last_java_sp,
1162 address entry_point,
1163 int number_of_arguments,
1164 bool check_exceptions) {
1165 Register java_thread = r15_thread;
1166
1167 // determine last_java_sp register
1168 if (!last_java_sp->is_valid()) {
1169 last_java_sp = rsp;
1170 }
1171 // debugging support
1172 assert(number_of_arguments >= 0 , "cannot have negative number of arguments");
1173 #ifdef ASSERT
1174 // TraceBytecodes does not use r12 but saves it over the call, so don't verify
1175 // r12 is the heapbase.
1176 if (UseCompressedOops && !TraceBytecodes) verify_heapbase("call_VM_base: heap base corrupted?");
1177 #endif // ASSERT
1178
1179 assert(java_thread != oop_result , "cannot use the same register for java_thread & oop_result");
1180 assert(java_thread != last_java_sp, "cannot use the same register for java_thread & last_java_sp");
1181
1182 // push java thread (becomes first argument of C function)
1183
1184 mov(c_rarg0, r15_thread);
1185
1186 // set last Java frame before call
1187 assert(last_java_sp != rbp, "can't use ebp/rbp");
1188
1189 // Only interpreter should have to set fp
1190 set_last_Java_frame(last_java_sp, rbp, nullptr, rscratch1);
1191
1192 // do the call, remove parameters
1193 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
1194
1195 #ifdef ASSERT
1196 // Check that thread register is not clobbered.
1197 guarantee(java_thread != rax, "change this code");
1198 push(rax);
1199 { Label L;
1200 get_thread_slow(rax);
1201 cmpptr(java_thread, rax);
1202 jcc(Assembler::equal, L);
1203 STOP("MacroAssembler::call_VM_base: java_thread not callee saved?");
1204 bind(L);
1205 }
1206 pop(rax);
1207 #endif
1208
1209 // reset last Java frame
1210 // Only interpreter should have to clear fp
1211 reset_last_Java_frame(true);
1212
1213 // C++ interp handles this in the interpreter
1214 check_and_handle_popframe();
1215 check_and_handle_earlyret();
1216
1217 if (check_exceptions) {
1218 // check for pending exceptions (java_thread is set upon return)
1219 cmpptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
1220 // This used to conditionally jump to forward_exception however it is
1221 // possible if we relocate that the branch will not reach. So we must jump
1222 // around so we can always reach
1223
1224 Label ok;
1225 jcc(Assembler::equal, ok);
1226 jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
1227 bind(ok);
1228 }
1229
1230 // get oop result if there is one and reset the value in the thread
1231 if (oop_result->is_valid()) {
1232 get_vm_result_oop(oop_result);
1233 }
1234 }
1235
1236 void MacroAssembler::call_VM_helper(Register oop_result, address entry_point, int number_of_arguments, bool check_exceptions) {
1237 // Calculate the value for last_Java_sp somewhat subtle.
1238 // call_VM does an intermediate call which places a return address on
1239 // the stack just under the stack pointer as the user finished with it.
1240 // This allows use to retrieve last_Java_pc from last_Java_sp[-1].
1241
1242 // We've pushed one address, correct last_Java_sp
1243 lea(rax, Address(rsp, wordSize));
1244
1245 call_VM_base(oop_result, rax, entry_point, number_of_arguments, check_exceptions);
1246 }
1247
1248 // Use this method when MacroAssembler version of call_VM_leaf_base() should be called from Interpreter.
1249 void MacroAssembler::call_VM_leaf0(address entry_point) {
1250 MacroAssembler::call_VM_leaf_base(entry_point, 0);
1251 }
1252
1253 void MacroAssembler::call_VM_leaf(address entry_point, int number_of_arguments) {
1254 call_VM_leaf_base(entry_point, number_of_arguments);
1255 }
1256
1257 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0) {
1258 pass_arg0(this, arg_0);
1259 call_VM_leaf(entry_point, 1);
1260 }
1261
1262 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1) {
1263
1264 assert_different_registers(arg_0, c_rarg1);
1265 pass_arg1(this, arg_1);
1266 pass_arg0(this, arg_0);
1267 call_VM_leaf(entry_point, 2);
1268 }
1269
1270 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) {
1271 assert_different_registers(arg_0, c_rarg1, c_rarg2);
1272 assert_different_registers(arg_1, c_rarg2);
1273 pass_arg2(this, arg_2);
1274 pass_arg1(this, arg_1);
1275 pass_arg0(this, arg_0);
1276 call_VM_leaf(entry_point, 3);
1277 }
1278
1279 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2, Register arg_3) {
1280 assert_different_registers(arg_0, c_rarg1, c_rarg2, c_rarg3);
1281 assert_different_registers(arg_1, c_rarg2, c_rarg3);
1282 assert_different_registers(arg_2, c_rarg3);
1283 pass_arg3(this, arg_3);
1284 pass_arg2(this, arg_2);
1285 pass_arg1(this, arg_1);
1286 pass_arg0(this, arg_0);
1287 call_VM_leaf(entry_point, 3);
1288 }
1289
1290 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0) {
1291 pass_arg0(this, arg_0);
1292 MacroAssembler::call_VM_leaf_base(entry_point, 1);
1293 }
1294
1295 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1) {
1296 assert_different_registers(arg_0, c_rarg1);
1297 pass_arg1(this, arg_1);
1298 pass_arg0(this, arg_0);
1299 MacroAssembler::call_VM_leaf_base(entry_point, 2);
1300 }
1301
1302 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) {
1303 assert_different_registers(arg_0, c_rarg1, c_rarg2);
1304 assert_different_registers(arg_1, c_rarg2);
1305 pass_arg2(this, arg_2);
1306 pass_arg1(this, arg_1);
1307 pass_arg0(this, arg_0);
1308 MacroAssembler::call_VM_leaf_base(entry_point, 3);
1309 }
1310
1311 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2, Register arg_3) {
1312 assert_different_registers(arg_0, c_rarg1, c_rarg2, c_rarg3);
1313 assert_different_registers(arg_1, c_rarg2, c_rarg3);
1314 assert_different_registers(arg_2, c_rarg3);
1315 pass_arg3(this, arg_3);
1316 pass_arg2(this, arg_2);
1317 pass_arg1(this, arg_1);
1318 pass_arg0(this, arg_0);
1319 MacroAssembler::call_VM_leaf_base(entry_point, 4);
1320 }
1321
1322 void MacroAssembler::get_vm_result_oop(Register oop_result) {
1323 movptr(oop_result, Address(r15_thread, JavaThread::vm_result_oop_offset()));
1324 movptr(Address(r15_thread, JavaThread::vm_result_oop_offset()), NULL_WORD);
1325 verify_oop_msg(oop_result, "broken oop in call_VM_base");
1326 }
1327
1328 void MacroAssembler::get_vm_result_metadata(Register metadata_result) {
1329 movptr(metadata_result, Address(r15_thread, JavaThread::vm_result_metadata_offset()));
1330 movptr(Address(r15_thread, JavaThread::vm_result_metadata_offset()), NULL_WORD);
1331 }
1332
1333 void MacroAssembler::check_and_handle_earlyret() {
1334 }
1335
1336 void MacroAssembler::check_and_handle_popframe() {
1337 }
1338
1339 void MacroAssembler::cmp32(AddressLiteral src1, int32_t imm, Register rscratch) {
1340 assert(rscratch != noreg || always_reachable(src1), "missing");
1341
1342 if (reachable(src1)) {
1343 cmpl(as_Address(src1), imm);
1344 } else {
1345 lea(rscratch, src1);
1346 cmpl(Address(rscratch, 0), imm);
1347 }
1348 }
1349
1350 void MacroAssembler::cmp32(Register src1, AddressLiteral src2, Register rscratch) {
1351 assert(!src2.is_lval(), "use cmpptr");
1352 assert(rscratch != noreg || always_reachable(src2), "missing");
1353
1354 if (reachable(src2)) {
1355 cmpl(src1, as_Address(src2));
1356 } else {
1357 lea(rscratch, src2);
1358 cmpl(src1, Address(rscratch, 0));
1359 }
1360 }
1361
1362 void MacroAssembler::cmp32(Register src1, int32_t imm) {
1363 Assembler::cmpl(src1, imm);
1364 }
1365
1366 void MacroAssembler::cmp32(Register src1, Address src2) {
1367 Assembler::cmpl(src1, src2);
1368 }
1369
1370 void MacroAssembler::cmpsd2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) {
1371 ucomisd(opr1, opr2);
1372
1373 Label L;
1374 if (unordered_is_less) {
1375 movl(dst, -1);
1376 jcc(Assembler::parity, L);
1377 jcc(Assembler::below , L);
1378 movl(dst, 0);
1379 jcc(Assembler::equal , L);
1380 increment(dst);
1381 } else { // unordered is greater
1382 movl(dst, 1);
1383 jcc(Assembler::parity, L);
1384 jcc(Assembler::above , L);
1385 movl(dst, 0);
1386 jcc(Assembler::equal , L);
1387 decrementl(dst);
1388 }
1389 bind(L);
1390 }
1391
1392 void MacroAssembler::cmpss2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) {
1393 ucomiss(opr1, opr2);
1394
1395 Label L;
1396 if (unordered_is_less) {
1397 movl(dst, -1);
1398 jcc(Assembler::parity, L);
1399 jcc(Assembler::below , L);
1400 movl(dst, 0);
1401 jcc(Assembler::equal , L);
1402 increment(dst);
1403 } else { // unordered is greater
1404 movl(dst, 1);
1405 jcc(Assembler::parity, L);
1406 jcc(Assembler::above , L);
1407 movl(dst, 0);
1408 jcc(Assembler::equal , L);
1409 decrementl(dst);
1410 }
1411 bind(L);
1412 }
1413
1414
1415 void MacroAssembler::cmp8(AddressLiteral src1, int imm, Register rscratch) {
1416 assert(rscratch != noreg || always_reachable(src1), "missing");
1417
1418 if (reachable(src1)) {
1419 cmpb(as_Address(src1), imm);
1420 } else {
1421 lea(rscratch, src1);
1422 cmpb(Address(rscratch, 0), imm);
1423 }
1424 }
1425
1426 void MacroAssembler::cmpptr(Register src1, AddressLiteral src2, Register rscratch) {
1427 assert(rscratch != noreg || always_reachable(src2), "missing");
1428
1429 if (src2.is_lval()) {
1430 movptr(rscratch, src2);
1431 Assembler::cmpq(src1, rscratch);
1432 } else if (reachable(src2)) {
1433 cmpq(src1, as_Address(src2));
1434 } else {
1435 lea(rscratch, src2);
1436 Assembler::cmpq(src1, Address(rscratch, 0));
1437 }
1438 }
1439
1440 void MacroAssembler::cmpptr(Address src1, AddressLiteral src2, Register rscratch) {
1441 assert(src2.is_lval(), "not a mem-mem compare");
1442 // moves src2's literal address
1443 movptr(rscratch, src2);
1444 Assembler::cmpq(src1, rscratch);
1445 }
1446
1447 void MacroAssembler::cmpoop(Register src1, Register src2) {
1448 cmpptr(src1, src2);
1449 }
1450
1451 void MacroAssembler::cmpoop(Register src1, Address src2) {
1452 cmpptr(src1, src2);
1453 }
1454
1455 void MacroAssembler::cmpoop(Register src1, jobject src2, Register rscratch) {
1456 movoop(rscratch, src2);
1457 cmpptr(src1, rscratch);
1458 }
1459
1460 void MacroAssembler::locked_cmpxchgptr(Register reg, AddressLiteral adr, Register rscratch) {
1461 assert(rscratch != noreg || always_reachable(adr), "missing");
1462
1463 if (reachable(adr)) {
1464 lock();
1465 cmpxchgptr(reg, as_Address(adr));
1466 } else {
1467 lea(rscratch, adr);
1468 lock();
1469 cmpxchgptr(reg, Address(rscratch, 0));
1470 }
1471 }
1472
1473 void MacroAssembler::cmpxchgptr(Register reg, Address adr) {
1474 cmpxchgq(reg, adr);
1475 }
1476
1477 void MacroAssembler::comisd(XMMRegister dst, AddressLiteral src, Register rscratch) {
1478 assert(rscratch != noreg || always_reachable(src), "missing");
1479
1480 if (reachable(src)) {
1481 Assembler::comisd(dst, as_Address(src));
1482 } else {
1483 lea(rscratch, src);
1484 Assembler::comisd(dst, Address(rscratch, 0));
1485 }
1486 }
1487
1488 void MacroAssembler::comiss(XMMRegister dst, AddressLiteral src, Register rscratch) {
1489 assert(rscratch != noreg || always_reachable(src), "missing");
1490
1491 if (reachable(src)) {
1492 Assembler::comiss(dst, as_Address(src));
1493 } else {
1494 lea(rscratch, src);
1495 Assembler::comiss(dst, Address(rscratch, 0));
1496 }
1497 }
1498
1499
1500 void MacroAssembler::cond_inc32(Condition cond, AddressLiteral counter_addr, Register rscratch) {
1501 assert(rscratch != noreg || always_reachable(counter_addr), "missing");
1502
1503 Condition negated_cond = negate_condition(cond);
1504 Label L;
1505 jcc(negated_cond, L);
1506 pushf(); // Preserve flags
1507 atomic_incl(counter_addr, rscratch);
1508 popf();
1509 bind(L);
1510 }
1511
1512 int MacroAssembler::corrected_idivl(Register reg) {
1513 // Full implementation of Java idiv and irem; checks for
1514 // special case as described in JVM spec., p.243 & p.271.
1515 // The function returns the (pc) offset of the idivl
1516 // instruction - may be needed for implicit exceptions.
1517 //
1518 // normal case special case
1519 //
1520 // input : rax,: dividend min_int
1521 // reg: divisor (may not be rax,/rdx) -1
1522 //
1523 // output: rax,: quotient (= rax, idiv reg) min_int
1524 // rdx: remainder (= rax, irem reg) 0
1525 assert(reg != rax && reg != rdx, "reg cannot be rax, or rdx register");
1526 const int min_int = 0x80000000;
1527 Label normal_case, special_case;
1528
1529 // check for special case
1530 cmpl(rax, min_int);
1531 jcc(Assembler::notEqual, normal_case);
1532 xorl(rdx, rdx); // prepare rdx for possible special case (where remainder = 0)
1533 cmpl(reg, -1);
1534 jcc(Assembler::equal, special_case);
1535
1536 // handle normal case
1537 bind(normal_case);
1538 cdql();
1539 int idivl_offset = offset();
1540 idivl(reg);
1541
1542 // normal and special case exit
1543 bind(special_case);
1544
1545 return idivl_offset;
1546 }
1547
1548
1549
1550 void MacroAssembler::decrementl(Register reg, int value) {
1551 if (value == min_jint) {subl(reg, value) ; return; }
1552 if (value < 0) { incrementl(reg, -value); return; }
1553 if (value == 0) { ; return; }
1554 if (value == 1 && UseIncDec) { decl(reg) ; return; }
1555 /* else */ { subl(reg, value) ; return; }
1556 }
1557
1558 void MacroAssembler::decrementl(Address dst, int value) {
1559 if (value == min_jint) {subl(dst, value) ; return; }
1560 if (value < 0) { incrementl(dst, -value); return; }
1561 if (value == 0) { ; return; }
1562 if (value == 1 && UseIncDec) { decl(dst) ; return; }
1563 /* else */ { subl(dst, value) ; return; }
1564 }
1565
1566 void MacroAssembler::division_with_shift (Register reg, int shift_value) {
1567 assert(shift_value > 0, "illegal shift value");
1568 Label _is_positive;
1569 testl (reg, reg);
1570 jcc (Assembler::positive, _is_positive);
1571 int offset = (1 << shift_value) - 1 ;
1572
1573 if (offset == 1) {
1574 incrementl(reg);
1575 } else {
1576 addl(reg, offset);
1577 }
1578
1579 bind (_is_positive);
1580 sarl(reg, shift_value);
1581 }
1582
1583 void MacroAssembler::divsd(XMMRegister dst, AddressLiteral src, Register rscratch) {
1584 assert(rscratch != noreg || always_reachable(src), "missing");
1585
1586 if (reachable(src)) {
1587 Assembler::divsd(dst, as_Address(src));
1588 } else {
1589 lea(rscratch, src);
1590 Assembler::divsd(dst, Address(rscratch, 0));
1591 }
1592 }
1593
1594 void MacroAssembler::divss(XMMRegister dst, AddressLiteral src, Register rscratch) {
1595 assert(rscratch != noreg || always_reachable(src), "missing");
1596
1597 if (reachable(src)) {
1598 Assembler::divss(dst, as_Address(src));
1599 } else {
1600 lea(rscratch, src);
1601 Assembler::divss(dst, Address(rscratch, 0));
1602 }
1603 }
1604
1605 void MacroAssembler::enter() {
1606 push(rbp);
1607 mov(rbp, rsp);
1608 }
1609
1610 void MacroAssembler::post_call_nop() {
1611 if (!Continuations::enabled()) {
1612 return;
1613 }
1614 InstructionMark im(this);
1615 relocate(post_call_nop_Relocation::spec());
1616 InlineSkippedInstructionsCounter skipCounter(this);
1617 emit_int8((uint8_t)0x0f);
1618 emit_int8((uint8_t)0x1f);
1619 emit_int8((uint8_t)0x84);
1620 emit_int8((uint8_t)0x00);
1621 emit_int32(0x00);
1622 }
1623
1624 // A 5 byte nop that is safe for patching (see patch_verified_entry)
1625 void MacroAssembler::fat_nop() {
1626 if (UseAddressNop) {
1627 addr_nop_5();
1628 } else {
1629 emit_int8((uint8_t)0x26); // es:
1630 emit_int8((uint8_t)0x2e); // cs:
1631 emit_int8((uint8_t)0x64); // fs:
1632 emit_int8((uint8_t)0x65); // gs:
1633 emit_int8((uint8_t)0x90);
1634 }
1635 }
1636
1637 void MacroAssembler::mulpd(XMMRegister dst, AddressLiteral src, Register rscratch) {
1638 assert(rscratch != noreg || always_reachable(src), "missing");
1639 if (reachable(src)) {
1640 Assembler::mulpd(dst, as_Address(src));
1641 } else {
1642 lea(rscratch, src);
1643 Assembler::mulpd(dst, Address(rscratch, 0));
1644 }
1645 }
1646
1647 // dst = c = a * b + c
1648 void MacroAssembler::fmad(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c) {
1649 Assembler::vfmadd231sd(c, a, b);
1650 if (dst != c) {
1651 movdbl(dst, c);
1652 }
1653 }
1654
1655 // dst = c = a * b + c
1656 void MacroAssembler::fmaf(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c) {
1657 Assembler::vfmadd231ss(c, a, b);
1658 if (dst != c) {
1659 movflt(dst, c);
1660 }
1661 }
1662
1663 // dst = c = a * b + c
1664 void MacroAssembler::vfmad(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c, int vector_len) {
1665 Assembler::vfmadd231pd(c, a, b, vector_len);
1666 if (dst != c) {
1667 vmovdqu(dst, c);
1668 }
1669 }
1670
1671 // dst = c = a * b + c
1672 void MacroAssembler::vfmaf(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c, int vector_len) {
1673 Assembler::vfmadd231ps(c, a, b, vector_len);
1674 if (dst != c) {
1675 vmovdqu(dst, c);
1676 }
1677 }
1678
1679 // dst = c = a * b + c
1680 void MacroAssembler::vfmad(XMMRegister dst, XMMRegister a, Address b, XMMRegister c, int vector_len) {
1681 Assembler::vfmadd231pd(c, a, b, vector_len);
1682 if (dst != c) {
1683 vmovdqu(dst, c);
1684 }
1685 }
1686
1687 // dst = c = a * b + c
1688 void MacroAssembler::vfmaf(XMMRegister dst, XMMRegister a, Address b, XMMRegister c, int vector_len) {
1689 Assembler::vfmadd231ps(c, a, b, vector_len);
1690 if (dst != c) {
1691 vmovdqu(dst, c);
1692 }
1693 }
1694
1695 void MacroAssembler::incrementl(AddressLiteral dst, Register rscratch) {
1696 assert(rscratch != noreg || always_reachable(dst), "missing");
1697
1698 if (reachable(dst)) {
1699 incrementl(as_Address(dst));
1700 } else {
1701 lea(rscratch, dst);
1702 incrementl(Address(rscratch, 0));
1703 }
1704 }
1705
1706 void MacroAssembler::incrementl(ArrayAddress dst, Register rscratch) {
1707 incrementl(as_Address(dst, rscratch));
1708 }
1709
1710 void MacroAssembler::incrementl(Register reg, int value) {
1711 if (value == min_jint) {addl(reg, value) ; return; }
1712 if (value < 0) { decrementl(reg, -value); return; }
1713 if (value == 0) { ; return; }
1714 if (value == 1 && UseIncDec) { incl(reg) ; return; }
1715 /* else */ { addl(reg, value) ; return; }
1716 }
1717
1718 void MacroAssembler::incrementl(Address dst, int value) {
1719 if (value == min_jint) {addl(dst, value) ; return; }
1720 if (value < 0) { decrementl(dst, -value); return; }
1721 if (value == 0) { ; return; }
1722 if (value == 1 && UseIncDec) { incl(dst) ; return; }
1723 /* else */ { addl(dst, value) ; return; }
1724 }
1725
1726 void MacroAssembler::jump(AddressLiteral dst, Register rscratch) {
1727 assert(rscratch != noreg || always_reachable(dst), "missing");
1728 assert(!dst.rspec().reloc()->is_data(), "should not use ExternalAddress for jump");
1729 if (reachable(dst)) {
1730 jmp_literal(dst.target(), dst.rspec());
1731 } else {
1732 lea(rscratch, dst);
1733 jmp(rscratch);
1734 }
1735 }
1736
1737 void MacroAssembler::jump_cc(Condition cc, AddressLiteral dst, Register rscratch) {
1738 assert(rscratch != noreg || always_reachable(dst), "missing");
1739 assert(!dst.rspec().reloc()->is_data(), "should not use ExternalAddress for jump_cc");
1740 if (reachable(dst)) {
1741 InstructionMark im(this);
1742 relocate(dst.reloc());
1743 const int short_size = 2;
1744 const int long_size = 6;
1745 int offs = (intptr_t)dst.target() - ((intptr_t)pc());
1746 if (dst.reloc() == relocInfo::none && is8bit(offs - short_size)) {
1747 // 0111 tttn #8-bit disp
1748 emit_int8(0x70 | cc);
1749 emit_int8((offs - short_size) & 0xFF);
1750 } else {
1751 // 0000 1111 1000 tttn #32-bit disp
1752 emit_int8(0x0F);
1753 emit_int8((unsigned char)(0x80 | cc));
1754 emit_int32(offs - long_size);
1755 }
1756 } else {
1757 #ifdef ASSERT
1758 warning("reversing conditional branch");
1759 #endif /* ASSERT */
1760 Label skip;
1761 jccb(reverse[cc], skip);
1762 lea(rscratch, dst);
1763 Assembler::jmp(rscratch);
1764 bind(skip);
1765 }
1766 }
1767
1768 void MacroAssembler::cmp32_mxcsr_std(Address mxcsr_save, Register tmp, Register rscratch) {
1769 ExternalAddress mxcsr_std(StubRoutines::x86::addr_mxcsr_std());
1770 assert(rscratch != noreg || always_reachable(mxcsr_std), "missing");
1771
1772 stmxcsr(mxcsr_save);
1773 movl(tmp, mxcsr_save);
1774 if (EnableX86ECoreOpts) {
1775 // The mxcsr_std has status bits set for performance on ECore
1776 orl(tmp, 0x003f);
1777 } else {
1778 // Mask out status bits (only check control and mask bits)
1779 andl(tmp, 0xFFC0);
1780 }
1781 cmp32(tmp, mxcsr_std, rscratch);
1782 }
1783
1784 void MacroAssembler::ldmxcsr(AddressLiteral src, Register rscratch) {
1785 assert(rscratch != noreg || always_reachable(src), "missing");
1786
1787 if (reachable(src)) {
1788 Assembler::ldmxcsr(as_Address(src));
1789 } else {
1790 lea(rscratch, src);
1791 Assembler::ldmxcsr(Address(rscratch, 0));
1792 }
1793 }
1794
1795 int MacroAssembler::load_signed_byte(Register dst, Address src) {
1796 int off = offset();
1797 movsbl(dst, src); // movsxb
1798 return off;
1799 }
1800
1801 // Note: load_signed_short used to be called load_signed_word.
1802 // Although the 'w' in x86 opcodes refers to the term "word" in the assembler
1803 // manual, which means 16 bits, that usage is found nowhere in HotSpot code.
1804 // The term "word" in HotSpot means a 32- or 64-bit machine word.
1805 int MacroAssembler::load_signed_short(Register dst, Address src) {
1806 // This is dubious to me since it seems safe to do a signed 16 => 64 bit
1807 // version but this is what 64bit has always done. This seems to imply
1808 // that users are only using 32bits worth.
1809 int off = offset();
1810 movswl(dst, src); // movsxw
1811 return off;
1812 }
1813
1814 int MacroAssembler::load_unsigned_byte(Register dst, Address src) {
1815 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16,
1816 // and "3.9 Partial Register Penalties", p. 22).
1817 int off = offset();
1818 movzbl(dst, src); // movzxb
1819 return off;
1820 }
1821
1822 // Note: load_unsigned_short used to be called load_unsigned_word.
1823 int MacroAssembler::load_unsigned_short(Register dst, Address src) {
1824 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16,
1825 // and "3.9 Partial Register Penalties", p. 22).
1826 int off = offset();
1827 movzwl(dst, src); // movzxw
1828 return off;
1829 }
1830
1831 void MacroAssembler::load_sized_value(Register dst, Address src, size_t size_in_bytes, bool is_signed, Register dst2) {
1832 switch (size_in_bytes) {
1833 case 8: movq(dst, src); break;
1834 case 4: movl(dst, src); break;
1835 case 2: is_signed ? load_signed_short(dst, src) : load_unsigned_short(dst, src); break;
1836 case 1: is_signed ? load_signed_byte( dst, src) : load_unsigned_byte( dst, src); break;
1837 default: ShouldNotReachHere();
1838 }
1839 }
1840
1841 void MacroAssembler::store_sized_value(Address dst, Register src, size_t size_in_bytes, Register src2) {
1842 switch (size_in_bytes) {
1843 case 8: movq(dst, src); break;
1844 case 4: movl(dst, src); break;
1845 case 2: movw(dst, src); break;
1846 case 1: movb(dst, src); break;
1847 default: ShouldNotReachHere();
1848 }
1849 }
1850
1851 void MacroAssembler::mov32(AddressLiteral dst, Register src, Register rscratch) {
1852 assert(rscratch != noreg || always_reachable(dst), "missing");
1853
1854 if (reachable(dst)) {
1855 movl(as_Address(dst), src);
1856 } else {
1857 lea(rscratch, dst);
1858 movl(Address(rscratch, 0), src);
1859 }
1860 }
1861
1862 void MacroAssembler::mov32(Register dst, AddressLiteral src) {
1863 if (reachable(src)) {
1864 movl(dst, as_Address(src));
1865 } else {
1866 lea(dst, src);
1867 movl(dst, Address(dst, 0));
1868 }
1869 }
1870
1871 // C++ bool manipulation
1872
1873 void MacroAssembler::movbool(Register dst, Address src) {
1874 if(sizeof(bool) == 1)
1875 movb(dst, src);
1876 else if(sizeof(bool) == 2)
1877 movw(dst, src);
1878 else if(sizeof(bool) == 4)
1879 movl(dst, src);
1880 else
1881 // unsupported
1882 ShouldNotReachHere();
1883 }
1884
1885 void MacroAssembler::movbool(Address dst, bool boolconst) {
1886 if(sizeof(bool) == 1)
1887 movb(dst, (int) boolconst);
1888 else if(sizeof(bool) == 2)
1889 movw(dst, (int) boolconst);
1890 else if(sizeof(bool) == 4)
1891 movl(dst, (int) boolconst);
1892 else
1893 // unsupported
1894 ShouldNotReachHere();
1895 }
1896
1897 void MacroAssembler::movbool(Address dst, Register src) {
1898 if(sizeof(bool) == 1)
1899 movb(dst, src);
1900 else if(sizeof(bool) == 2)
1901 movw(dst, src);
1902 else if(sizeof(bool) == 4)
1903 movl(dst, src);
1904 else
1905 // unsupported
1906 ShouldNotReachHere();
1907 }
1908
1909 void MacroAssembler::movdl(XMMRegister dst, AddressLiteral src, Register rscratch) {
1910 assert(rscratch != noreg || always_reachable(src), "missing");
1911
1912 if (reachable(src)) {
1913 movdl(dst, as_Address(src));
1914 } else {
1915 lea(rscratch, src);
1916 movdl(dst, Address(rscratch, 0));
1917 }
1918 }
1919
1920 void MacroAssembler::movq(XMMRegister dst, AddressLiteral src, Register rscratch) {
1921 assert(rscratch != noreg || always_reachable(src), "missing");
1922
1923 if (reachable(src)) {
1924 movq(dst, as_Address(src));
1925 } else {
1926 lea(rscratch, src);
1927 movq(dst, Address(rscratch, 0));
1928 }
1929 }
1930
1931 void MacroAssembler::movdbl(XMMRegister dst, AddressLiteral src, Register rscratch) {
1932 assert(rscratch != noreg || always_reachable(src), "missing");
1933
1934 if (reachable(src)) {
1935 if (UseXmmLoadAndClearUpper) {
1936 movsd (dst, as_Address(src));
1937 } else {
1938 movlpd(dst, as_Address(src));
1939 }
1940 } else {
1941 lea(rscratch, src);
1942 if (UseXmmLoadAndClearUpper) {
1943 movsd (dst, Address(rscratch, 0));
1944 } else {
1945 movlpd(dst, Address(rscratch, 0));
1946 }
1947 }
1948 }
1949
1950 void MacroAssembler::movflt(XMMRegister dst, AddressLiteral src, Register rscratch) {
1951 assert(rscratch != noreg || always_reachable(src), "missing");
1952
1953 if (reachable(src)) {
1954 movss(dst, as_Address(src));
1955 } else {
1956 lea(rscratch, src);
1957 movss(dst, Address(rscratch, 0));
1958 }
1959 }
1960
1961 void MacroAssembler::movptr(Register dst, Register src) {
1962 movq(dst, src);
1963 }
1964
1965 void MacroAssembler::movptr(Register dst, Address src) {
1966 movq(dst, src);
1967 }
1968
1969 // src should NEVER be a real pointer. Use AddressLiteral for true pointers
1970 void MacroAssembler::movptr(Register dst, intptr_t src) {
1971 if (is_uimm32(src)) {
1972 movl(dst, checked_cast<uint32_t>(src));
1973 } else if (is_simm32(src)) {
1974 movq(dst, checked_cast<int32_t>(src));
1975 } else {
1976 mov64(dst, src);
1977 }
1978 }
1979
1980 void MacroAssembler::movptr(Address dst, Register src) {
1981 movq(dst, src);
1982 }
1983
1984 void MacroAssembler::movptr(Address dst, int32_t src) {
1985 movslq(dst, src);
1986 }
1987
1988 void MacroAssembler::movdqu(Address dst, XMMRegister src) {
1989 assert(((src->encoding() < 16) || VM_Version::supports_avx512vl()),"XMM register should be 0-15");
1990 Assembler::movdqu(dst, src);
1991 }
1992
1993 void MacroAssembler::movdqu(XMMRegister dst, Address src) {
1994 assert(((dst->encoding() < 16) || VM_Version::supports_avx512vl()),"XMM register should be 0-15");
1995 Assembler::movdqu(dst, src);
1996 }
1997
1998 void MacroAssembler::movdqu(XMMRegister dst, XMMRegister src) {
1999 assert(((dst->encoding() < 16 && src->encoding() < 16) || VM_Version::supports_avx512vl()),"XMM register should be 0-15");
2000 Assembler::movdqu(dst, src);
2001 }
2002
2003 void MacroAssembler::movdqu(XMMRegister dst, AddressLiteral src, Register rscratch) {
2004 assert(rscratch != noreg || always_reachable(src), "missing");
2005
2006 if (reachable(src)) {
2007 movdqu(dst, as_Address(src));
2008 } else {
2009 lea(rscratch, src);
2010 movdqu(dst, Address(rscratch, 0));
2011 }
2012 }
2013
2014 void MacroAssembler::vmovdqu(Address dst, XMMRegister src) {
2015 assert(((src->encoding() < 16) || VM_Version::supports_avx512vl()),"XMM register should be 0-15");
2016 Assembler::vmovdqu(dst, src);
2017 }
2018
2019 void MacroAssembler::vmovdqu(XMMRegister dst, Address src) {
2020 assert(((dst->encoding() < 16) || VM_Version::supports_avx512vl()),"XMM register should be 0-15");
2021 Assembler::vmovdqu(dst, src);
2022 }
2023
2024 void MacroAssembler::vmovdqu(XMMRegister dst, XMMRegister src) {
2025 assert(((dst->encoding() < 16 && src->encoding() < 16) || VM_Version::supports_avx512vl()),"XMM register should be 0-15");
2026 Assembler::vmovdqu(dst, src);
2027 }
2028
2029 void MacroAssembler::vmovdqu(XMMRegister dst, AddressLiteral src, Register rscratch) {
2030 assert(rscratch != noreg || always_reachable(src), "missing");
2031
2032 if (reachable(src)) {
2033 vmovdqu(dst, as_Address(src));
2034 }
2035 else {
2036 lea(rscratch, src);
2037 vmovdqu(dst, Address(rscratch, 0));
2038 }
2039 }
2040
2041 void MacroAssembler::vmovdqu(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2042 assert(rscratch != noreg || always_reachable(src), "missing");
2043
2044 if (vector_len == AVX_512bit) {
2045 evmovdquq(dst, src, AVX_512bit, rscratch);
2046 } else if (vector_len == AVX_256bit) {
2047 vmovdqu(dst, src, rscratch);
2048 } else {
2049 movdqu(dst, src, rscratch);
2050 }
2051 }
2052
2053 void MacroAssembler::vmovdqu(XMMRegister dst, XMMRegister src, int vector_len) {
2054 if (vector_len == AVX_512bit) {
2055 evmovdquq(dst, src, AVX_512bit);
2056 } else if (vector_len == AVX_256bit) {
2057 vmovdqu(dst, src);
2058 } else {
2059 movdqu(dst, src);
2060 }
2061 }
2062
2063 void MacroAssembler::vmovdqu(Address dst, XMMRegister src, int vector_len) {
2064 if (vector_len == AVX_512bit) {
2065 evmovdquq(dst, src, AVX_512bit);
2066 } else if (vector_len == AVX_256bit) {
2067 vmovdqu(dst, src);
2068 } else {
2069 movdqu(dst, src);
2070 }
2071 }
2072
2073 void MacroAssembler::vmovdqu(XMMRegister dst, Address src, int vector_len) {
2074 if (vector_len == AVX_512bit) {
2075 evmovdquq(dst, src, AVX_512bit);
2076 } else if (vector_len == AVX_256bit) {
2077 vmovdqu(dst, src);
2078 } else {
2079 movdqu(dst, src);
2080 }
2081 }
2082
2083 void MacroAssembler::vmovdqa(XMMRegister dst, AddressLiteral src, Register rscratch) {
2084 assert(rscratch != noreg || always_reachable(src), "missing");
2085
2086 if (reachable(src)) {
2087 vmovdqa(dst, as_Address(src));
2088 }
2089 else {
2090 lea(rscratch, src);
2091 vmovdqa(dst, Address(rscratch, 0));
2092 }
2093 }
2094
2095 void MacroAssembler::vmovdqa(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2096 assert(rscratch != noreg || always_reachable(src), "missing");
2097
2098 if (vector_len == AVX_512bit) {
2099 evmovdqaq(dst, src, AVX_512bit, rscratch);
2100 } else if (vector_len == AVX_256bit) {
2101 vmovdqa(dst, src, rscratch);
2102 } else {
2103 movdqa(dst, src, rscratch);
2104 }
2105 }
2106
2107 void MacroAssembler::kmov(KRegister dst, Address src) {
2108 if (VM_Version::supports_avx512bw()) {
2109 kmovql(dst, src);
2110 } else {
2111 assert(VM_Version::supports_evex(), "");
2112 kmovwl(dst, src);
2113 }
2114 }
2115
2116 void MacroAssembler::kmov(Address dst, KRegister src) {
2117 if (VM_Version::supports_avx512bw()) {
2118 kmovql(dst, src);
2119 } else {
2120 assert(VM_Version::supports_evex(), "");
2121 kmovwl(dst, src);
2122 }
2123 }
2124
2125 void MacroAssembler::kmov(KRegister dst, KRegister src) {
2126 if (VM_Version::supports_avx512bw()) {
2127 kmovql(dst, src);
2128 } else {
2129 assert(VM_Version::supports_evex(), "");
2130 kmovwl(dst, src);
2131 }
2132 }
2133
2134 void MacroAssembler::kmov(Register dst, KRegister src) {
2135 if (VM_Version::supports_avx512bw()) {
2136 kmovql(dst, src);
2137 } else {
2138 assert(VM_Version::supports_evex(), "");
2139 kmovwl(dst, src);
2140 }
2141 }
2142
2143 void MacroAssembler::kmov(KRegister dst, Register src) {
2144 if (VM_Version::supports_avx512bw()) {
2145 kmovql(dst, src);
2146 } else {
2147 assert(VM_Version::supports_evex(), "");
2148 kmovwl(dst, src);
2149 }
2150 }
2151
2152 void MacroAssembler::kmovql(KRegister dst, AddressLiteral src, Register rscratch) {
2153 assert(rscratch != noreg || always_reachable(src), "missing");
2154
2155 if (reachable(src)) {
2156 kmovql(dst, as_Address(src));
2157 } else {
2158 lea(rscratch, src);
2159 kmovql(dst, Address(rscratch, 0));
2160 }
2161 }
2162
2163 void MacroAssembler::kmovwl(KRegister dst, AddressLiteral src, Register rscratch) {
2164 assert(rscratch != noreg || always_reachable(src), "missing");
2165
2166 if (reachable(src)) {
2167 kmovwl(dst, as_Address(src));
2168 } else {
2169 lea(rscratch, src);
2170 kmovwl(dst, Address(rscratch, 0));
2171 }
2172 }
2173
2174 void MacroAssembler::evmovdqub(XMMRegister dst, KRegister mask, AddressLiteral src, bool merge,
2175 int vector_len, Register rscratch) {
2176 assert(rscratch != noreg || always_reachable(src), "missing");
2177
2178 if (reachable(src)) {
2179 Assembler::evmovdqub(dst, mask, as_Address(src), merge, vector_len);
2180 } else {
2181 lea(rscratch, src);
2182 Assembler::evmovdqub(dst, mask, Address(rscratch, 0), merge, vector_len);
2183 }
2184 }
2185
2186 void MacroAssembler::evmovdquw(XMMRegister dst, KRegister mask, AddressLiteral src, bool merge,
2187 int vector_len, Register rscratch) {
2188 assert(rscratch != noreg || always_reachable(src), "missing");
2189
2190 if (reachable(src)) {
2191 Assembler::evmovdquw(dst, mask, as_Address(src), merge, vector_len);
2192 } else {
2193 lea(rscratch, src);
2194 Assembler::evmovdquw(dst, mask, Address(rscratch, 0), merge, vector_len);
2195 }
2196 }
2197
2198 void MacroAssembler::evmovdqul(XMMRegister dst, KRegister mask, AddressLiteral src, bool merge, int vector_len, Register rscratch) {
2199 assert(rscratch != noreg || always_reachable(src), "missing");
2200
2201 if (reachable(src)) {
2202 Assembler::evmovdqul(dst, mask, as_Address(src), merge, vector_len);
2203 } else {
2204 lea(rscratch, src);
2205 Assembler::evmovdqul(dst, mask, Address(rscratch, 0), merge, vector_len);
2206 }
2207 }
2208
2209 void MacroAssembler::evmovdquq(XMMRegister dst, KRegister mask, AddressLiteral src, bool merge, int vector_len, Register rscratch) {
2210 assert(rscratch != noreg || always_reachable(src), "missing");
2211
2212 if (reachable(src)) {
2213 Assembler::evmovdquq(dst, mask, as_Address(src), merge, vector_len);
2214 } else {
2215 lea(rscratch, src);
2216 Assembler::evmovdquq(dst, mask, Address(rscratch, 0), merge, vector_len);
2217 }
2218 }
2219
2220 void MacroAssembler::evmovdquq(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2221 assert(rscratch != noreg || always_reachable(src), "missing");
2222
2223 if (reachable(src)) {
2224 Assembler::evmovdquq(dst, as_Address(src), vector_len);
2225 } else {
2226 lea(rscratch, src);
2227 Assembler::evmovdquq(dst, Address(rscratch, 0), vector_len);
2228 }
2229 }
2230
2231 void MacroAssembler::evmovdqaq(XMMRegister dst, KRegister mask, AddressLiteral src, bool merge, int vector_len, Register rscratch) {
2232 assert(rscratch != noreg || always_reachable(src), "missing");
2233
2234 if (reachable(src)) {
2235 Assembler::evmovdqaq(dst, mask, as_Address(src), merge, vector_len);
2236 } else {
2237 lea(rscratch, src);
2238 Assembler::evmovdqaq(dst, mask, Address(rscratch, 0), merge, vector_len);
2239 }
2240 }
2241
2242 void MacroAssembler::evmovdqaq(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2243 assert(rscratch != noreg || always_reachable(src), "missing");
2244
2245 if (reachable(src)) {
2246 Assembler::evmovdqaq(dst, as_Address(src), vector_len);
2247 } else {
2248 lea(rscratch, src);
2249 Assembler::evmovdqaq(dst, Address(rscratch, 0), vector_len);
2250 }
2251 }
2252
2253
2254 void MacroAssembler::movdqa(XMMRegister dst, AddressLiteral src, Register rscratch) {
2255 assert(rscratch != noreg || always_reachable(src), "missing");
2256
2257 if (reachable(src)) {
2258 Assembler::movdqa(dst, as_Address(src));
2259 } else {
2260 lea(rscratch, src);
2261 Assembler::movdqa(dst, Address(rscratch, 0));
2262 }
2263 }
2264
2265 void MacroAssembler::movsd(XMMRegister dst, AddressLiteral src, Register rscratch) {
2266 assert(rscratch != noreg || always_reachable(src), "missing");
2267
2268 if (reachable(src)) {
2269 Assembler::movsd(dst, as_Address(src));
2270 } else {
2271 lea(rscratch, src);
2272 Assembler::movsd(dst, Address(rscratch, 0));
2273 }
2274 }
2275
2276 void MacroAssembler::movss(XMMRegister dst, AddressLiteral src, Register rscratch) {
2277 assert(rscratch != noreg || always_reachable(src), "missing");
2278
2279 if (reachable(src)) {
2280 Assembler::movss(dst, as_Address(src));
2281 } else {
2282 lea(rscratch, src);
2283 Assembler::movss(dst, Address(rscratch, 0));
2284 }
2285 }
2286
2287 void MacroAssembler::movddup(XMMRegister dst, AddressLiteral src, Register rscratch) {
2288 assert(rscratch != noreg || always_reachable(src), "missing");
2289
2290 if (reachable(src)) {
2291 Assembler::movddup(dst, as_Address(src));
2292 } else {
2293 lea(rscratch, src);
2294 Assembler::movddup(dst, Address(rscratch, 0));
2295 }
2296 }
2297
2298 void MacroAssembler::vmovddup(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2299 assert(rscratch != noreg || always_reachable(src), "missing");
2300
2301 if (reachable(src)) {
2302 Assembler::vmovddup(dst, as_Address(src), vector_len);
2303 } else {
2304 lea(rscratch, src);
2305 Assembler::vmovddup(dst, Address(rscratch, 0), vector_len);
2306 }
2307 }
2308
2309 void MacroAssembler::mulsd(XMMRegister dst, AddressLiteral src, Register rscratch) {
2310 assert(rscratch != noreg || always_reachable(src), "missing");
2311
2312 if (reachable(src)) {
2313 Assembler::mulsd(dst, as_Address(src));
2314 } else {
2315 lea(rscratch, src);
2316 Assembler::mulsd(dst, Address(rscratch, 0));
2317 }
2318 }
2319
2320 void MacroAssembler::mulss(XMMRegister dst, AddressLiteral src, Register rscratch) {
2321 assert(rscratch != noreg || always_reachable(src), "missing");
2322
2323 if (reachable(src)) {
2324 Assembler::mulss(dst, as_Address(src));
2325 } else {
2326 lea(rscratch, src);
2327 Assembler::mulss(dst, Address(rscratch, 0));
2328 }
2329 }
2330
2331 void MacroAssembler::null_check(Register reg, int offset) {
2332 if (needs_explicit_null_check(offset)) {
2333 // provoke OS null exception if reg is null by
2334 // accessing M[reg] w/o changing any (non-CC) registers
2335 // NOTE: cmpl is plenty here to provoke a segv
2336 cmpptr(rax, Address(reg, 0));
2337 // Note: should probably use testl(rax, Address(reg, 0));
2338 // may be shorter code (however, this version of
2339 // testl needs to be implemented first)
2340 } else {
2341 // nothing to do, (later) access of M[reg + offset]
2342 // will provoke OS null exception if reg is null
2343 }
2344 }
2345
2346 void MacroAssembler::os_breakpoint() {
2347 // instead of directly emitting a breakpoint, call os:breakpoint for better debugability
2348 // (e.g., MSVC can't call ps() otherwise)
2349 call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint)));
2350 }
2351
2352 void MacroAssembler::unimplemented(const char* what) {
2353 const char* buf = nullptr;
2354 {
2355 ResourceMark rm;
2356 stringStream ss;
2357 ss.print("unimplemented: %s", what);
2358 buf = code_string(ss.as_string());
2359 }
2360 stop(buf);
2361 }
2362
2363 #define XSTATE_BV 0x200
2364
2365 void MacroAssembler::pop_CPU_state() {
2366 pop_FPU_state();
2367 pop_IU_state();
2368 }
2369
2370 void MacroAssembler::pop_FPU_state() {
2371 fxrstor(Address(rsp, 0));
2372 addptr(rsp, FPUStateSizeInWords * wordSize);
2373 }
2374
2375 void MacroAssembler::pop_IU_state() {
2376 popa();
2377 addq(rsp, 8);
2378 popf();
2379 }
2380
2381 // Save Integer and Float state
2382 // Warning: Stack must be 16 byte aligned (64bit)
2383 void MacroAssembler::push_CPU_state() {
2384 push_IU_state();
2385 push_FPU_state();
2386 }
2387
2388 void MacroAssembler::push_FPU_state() {
2389 subptr(rsp, FPUStateSizeInWords * wordSize);
2390 fxsave(Address(rsp, 0));
2391 }
2392
2393 void MacroAssembler::push_IU_state() {
2394 // Push flags first because pusha kills them
2395 pushf();
2396 // Make sure rsp stays 16-byte aligned
2397 subq(rsp, 8);
2398 pusha();
2399 }
2400
2401 void MacroAssembler::push_cont_fastpath() {
2402 if (!Continuations::enabled()) return;
2403
2404 Label L_done;
2405 cmpptr(rsp, Address(r15_thread, JavaThread::cont_fastpath_offset()));
2406 jccb(Assembler::belowEqual, L_done);
2407 movptr(Address(r15_thread, JavaThread::cont_fastpath_offset()), rsp);
2408 bind(L_done);
2409 }
2410
2411 void MacroAssembler::pop_cont_fastpath() {
2412 if (!Continuations::enabled()) return;
2413
2414 Label L_done;
2415 cmpptr(rsp, Address(r15_thread, JavaThread::cont_fastpath_offset()));
2416 jccb(Assembler::below, L_done);
2417 movptr(Address(r15_thread, JavaThread::cont_fastpath_offset()), 0);
2418 bind(L_done);
2419 }
2420
2421 void MacroAssembler::inc_held_monitor_count() {
2422 incrementq(Address(r15_thread, JavaThread::held_monitor_count_offset()));
2423 }
2424
2425 void MacroAssembler::dec_held_monitor_count() {
2426 decrementq(Address(r15_thread, JavaThread::held_monitor_count_offset()));
2427 }
2428
2429 #ifdef ASSERT
2430 void MacroAssembler::stop_if_in_cont(Register cont, const char* name) {
2431 Label no_cont;
2432 movptr(cont, Address(r15_thread, JavaThread::cont_entry_offset()));
2433 testl(cont, cont);
2434 jcc(Assembler::zero, no_cont);
2435 stop(name);
2436 bind(no_cont);
2437 }
2438 #endif
2439
2440 void MacroAssembler::reset_last_Java_frame(bool clear_fp) { // determine java_thread register
2441 // we must set sp to zero to clear frame
2442 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), NULL_WORD);
2443 // must clear fp, so that compiled frames are not confused; it is
2444 // possible that we need it only for debugging
2445 if (clear_fp) {
2446 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()), NULL_WORD);
2447 }
2448 // Always clear the pc because it could have been set by make_walkable()
2449 movptr(Address(r15_thread, JavaThread::last_Java_pc_offset()), NULL_WORD);
2450 vzeroupper();
2451 }
2452
2453 void MacroAssembler::round_to(Register reg, int modulus) {
2454 addptr(reg, modulus - 1);
2455 andptr(reg, -modulus);
2456 }
2457
2458 void MacroAssembler::safepoint_poll(Label& slow_path, bool at_return, bool in_nmethod) {
2459 if (at_return) {
2460 // Note that when in_nmethod is set, the stack pointer is incremented before the poll. Therefore,
2461 // we may safely use rsp instead to perform the stack watermark check.
2462 cmpptr(in_nmethod ? rsp : rbp, Address(r15_thread, JavaThread::polling_word_offset()));
2463 jcc(Assembler::above, slow_path);
2464 return;
2465 }
2466 testb(Address(r15_thread, JavaThread::polling_word_offset()), SafepointMechanism::poll_bit());
2467 jcc(Assembler::notZero, slow_path); // handshake bit set implies poll
2468 }
2469
2470 // Calls to C land
2471 //
2472 // When entering C land, the rbp, & rsp of the last Java frame have to be recorded
2473 // in the (thread-local) JavaThread object. When leaving C land, the last Java fp
2474 // has to be reset to 0. This is required to allow proper stack traversal.
2475 void MacroAssembler::set_last_Java_frame(Register last_java_sp,
2476 Register last_java_fp,
2477 address last_java_pc,
2478 Register rscratch) {
2479 vzeroupper();
2480 // determine last_java_sp register
2481 if (!last_java_sp->is_valid()) {
2482 last_java_sp = rsp;
2483 }
2484 // last_java_fp is optional
2485 if (last_java_fp->is_valid()) {
2486 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()), last_java_fp);
2487 }
2488 // last_java_pc is optional
2489 if (last_java_pc != nullptr) {
2490 Address java_pc(r15_thread,
2491 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset());
2492 lea(java_pc, InternalAddress(last_java_pc), rscratch);
2493 }
2494 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), last_java_sp);
2495 }
2496
2497 void MacroAssembler::set_last_Java_frame(Register last_java_sp,
2498 Register last_java_fp,
2499 Label &L,
2500 Register scratch) {
2501 lea(scratch, L);
2502 movptr(Address(r15_thread, JavaThread::last_Java_pc_offset()), scratch);
2503 set_last_Java_frame(last_java_sp, last_java_fp, nullptr, scratch);
2504 }
2505
2506 void MacroAssembler::shlptr(Register dst, int imm8) {
2507 shlq(dst, imm8);
2508 }
2509
2510 void MacroAssembler::shrptr(Register dst, int imm8) {
2511 shrq(dst, imm8);
2512 }
2513
2514 void MacroAssembler::sign_extend_byte(Register reg) {
2515 movsbl(reg, reg); // movsxb
2516 }
2517
2518 void MacroAssembler::sign_extend_short(Register reg) {
2519 movswl(reg, reg); // movsxw
2520 }
2521
2522 void MacroAssembler::testl(Address dst, int32_t imm32) {
2523 if (imm32 >= 0 && is8bit(imm32)) {
2524 testb(dst, imm32);
2525 } else {
2526 Assembler::testl(dst, imm32);
2527 }
2528 }
2529
2530 void MacroAssembler::testl(Register dst, int32_t imm32) {
2531 if (imm32 >= 0 && is8bit(imm32) && dst->has_byte_register()) {
2532 testb(dst, imm32);
2533 } else {
2534 Assembler::testl(dst, imm32);
2535 }
2536 }
2537
2538 void MacroAssembler::testl(Register dst, AddressLiteral src) {
2539 assert(always_reachable(src), "Address should be reachable");
2540 testl(dst, as_Address(src));
2541 }
2542
2543 void MacroAssembler::testq(Address dst, int32_t imm32) {
2544 if (imm32 >= 0) {
2545 testl(dst, imm32);
2546 } else {
2547 Assembler::testq(dst, imm32);
2548 }
2549 }
2550
2551 void MacroAssembler::testq(Register dst, int32_t imm32) {
2552 if (imm32 >= 0) {
2553 testl(dst, imm32);
2554 } else {
2555 Assembler::testq(dst, imm32);
2556 }
2557 }
2558
2559 void MacroAssembler::pcmpeqb(XMMRegister dst, XMMRegister src) {
2560 assert(((dst->encoding() < 16 && src->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2561 Assembler::pcmpeqb(dst, src);
2562 }
2563
2564 void MacroAssembler::pcmpeqw(XMMRegister dst, XMMRegister src) {
2565 assert(((dst->encoding() < 16 && src->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2566 Assembler::pcmpeqw(dst, src);
2567 }
2568
2569 void MacroAssembler::pcmpestri(XMMRegister dst, Address src, int imm8) {
2570 assert((dst->encoding() < 16),"XMM register should be 0-15");
2571 Assembler::pcmpestri(dst, src, imm8);
2572 }
2573
2574 void MacroAssembler::pcmpestri(XMMRegister dst, XMMRegister src, int imm8) {
2575 assert((dst->encoding() < 16 && src->encoding() < 16),"XMM register should be 0-15");
2576 Assembler::pcmpestri(dst, src, imm8);
2577 }
2578
2579 void MacroAssembler::pmovzxbw(XMMRegister dst, XMMRegister src) {
2580 assert(((dst->encoding() < 16 && src->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2581 Assembler::pmovzxbw(dst, src);
2582 }
2583
2584 void MacroAssembler::pmovzxbw(XMMRegister dst, Address src) {
2585 assert(((dst->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2586 Assembler::pmovzxbw(dst, src);
2587 }
2588
2589 void MacroAssembler::pmovmskb(Register dst, XMMRegister src) {
2590 assert((src->encoding() < 16),"XMM register should be 0-15");
2591 Assembler::pmovmskb(dst, src);
2592 }
2593
2594 void MacroAssembler::ptest(XMMRegister dst, XMMRegister src) {
2595 assert((dst->encoding() < 16 && src->encoding() < 16),"XMM register should be 0-15");
2596 Assembler::ptest(dst, src);
2597 }
2598
2599 void MacroAssembler::sqrtss(XMMRegister dst, AddressLiteral src, Register rscratch) {
2600 assert(rscratch != noreg || always_reachable(src), "missing");
2601
2602 if (reachable(src)) {
2603 Assembler::sqrtss(dst, as_Address(src));
2604 } else {
2605 lea(rscratch, src);
2606 Assembler::sqrtss(dst, Address(rscratch, 0));
2607 }
2608 }
2609
2610 void MacroAssembler::subsd(XMMRegister dst, AddressLiteral src, Register rscratch) {
2611 assert(rscratch != noreg || always_reachable(src), "missing");
2612
2613 if (reachable(src)) {
2614 Assembler::subsd(dst, as_Address(src));
2615 } else {
2616 lea(rscratch, src);
2617 Assembler::subsd(dst, Address(rscratch, 0));
2618 }
2619 }
2620
2621 void MacroAssembler::roundsd(XMMRegister dst, AddressLiteral src, int32_t rmode, Register rscratch) {
2622 assert(rscratch != noreg || always_reachable(src), "missing");
2623
2624 if (reachable(src)) {
2625 Assembler::roundsd(dst, as_Address(src), rmode);
2626 } else {
2627 lea(rscratch, src);
2628 Assembler::roundsd(dst, Address(rscratch, 0), rmode);
2629 }
2630 }
2631
2632 void MacroAssembler::subss(XMMRegister dst, AddressLiteral src, Register rscratch) {
2633 assert(rscratch != noreg || always_reachable(src), "missing");
2634
2635 if (reachable(src)) {
2636 Assembler::subss(dst, as_Address(src));
2637 } else {
2638 lea(rscratch, src);
2639 Assembler::subss(dst, Address(rscratch, 0));
2640 }
2641 }
2642
2643 void MacroAssembler::ucomisd(XMMRegister dst, AddressLiteral src, Register rscratch) {
2644 assert(rscratch != noreg || always_reachable(src), "missing");
2645
2646 if (reachable(src)) {
2647 Assembler::ucomisd(dst, as_Address(src));
2648 } else {
2649 lea(rscratch, src);
2650 Assembler::ucomisd(dst, Address(rscratch, 0));
2651 }
2652 }
2653
2654 void MacroAssembler::ucomiss(XMMRegister dst, AddressLiteral src, Register rscratch) {
2655 assert(rscratch != noreg || always_reachable(src), "missing");
2656
2657 if (reachable(src)) {
2658 Assembler::ucomiss(dst, as_Address(src));
2659 } else {
2660 lea(rscratch, src);
2661 Assembler::ucomiss(dst, Address(rscratch, 0));
2662 }
2663 }
2664
2665 void MacroAssembler::xorpd(XMMRegister dst, AddressLiteral src, Register rscratch) {
2666 assert(rscratch != noreg || always_reachable(src), "missing");
2667
2668 // Used in sign-bit flipping with aligned address.
2669 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
2670
2671 if (UseAVX > 2 &&
2672 (!VM_Version::supports_avx512dq() || !VM_Version::supports_avx512vl()) &&
2673 (dst->encoding() >= 16)) {
2674 vpxor(dst, dst, src, Assembler::AVX_512bit, rscratch);
2675 } else if (reachable(src)) {
2676 Assembler::xorpd(dst, as_Address(src));
2677 } else {
2678 lea(rscratch, src);
2679 Assembler::xorpd(dst, Address(rscratch, 0));
2680 }
2681 }
2682
2683 void MacroAssembler::xorpd(XMMRegister dst, XMMRegister src) {
2684 if (UseAVX > 2 &&
2685 (!VM_Version::supports_avx512dq() || !VM_Version::supports_avx512vl()) &&
2686 ((dst->encoding() >= 16) || (src->encoding() >= 16))) {
2687 Assembler::vpxor(dst, dst, src, Assembler::AVX_512bit);
2688 } else {
2689 Assembler::xorpd(dst, src);
2690 }
2691 }
2692
2693 void MacroAssembler::xorps(XMMRegister dst, XMMRegister src) {
2694 if (UseAVX > 2 &&
2695 (!VM_Version::supports_avx512dq() || !VM_Version::supports_avx512vl()) &&
2696 ((dst->encoding() >= 16) || (src->encoding() >= 16))) {
2697 Assembler::vpxor(dst, dst, src, Assembler::AVX_512bit);
2698 } else {
2699 Assembler::xorps(dst, src);
2700 }
2701 }
2702
2703 void MacroAssembler::xorps(XMMRegister dst, AddressLiteral src, Register rscratch) {
2704 assert(rscratch != noreg || always_reachable(src), "missing");
2705
2706 // Used in sign-bit flipping with aligned address.
2707 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes");
2708
2709 if (UseAVX > 2 &&
2710 (!VM_Version::supports_avx512dq() || !VM_Version::supports_avx512vl()) &&
2711 (dst->encoding() >= 16)) {
2712 vpxor(dst, dst, src, Assembler::AVX_512bit, rscratch);
2713 } else if (reachable(src)) {
2714 Assembler::xorps(dst, as_Address(src));
2715 } else {
2716 lea(rscratch, src);
2717 Assembler::xorps(dst, Address(rscratch, 0));
2718 }
2719 }
2720
2721 void MacroAssembler::pshufb(XMMRegister dst, AddressLiteral src, Register rscratch) {
2722 assert(rscratch != noreg || always_reachable(src), "missing");
2723
2724 // Used in sign-bit flipping with aligned address.
2725 bool aligned_adr = (((intptr_t)src.target() & 15) == 0);
2726 assert((UseAVX > 0) || aligned_adr, "SSE mode requires address alignment 16 bytes");
2727 if (reachable(src)) {
2728 Assembler::pshufb(dst, as_Address(src));
2729 } else {
2730 lea(rscratch, src);
2731 Assembler::pshufb(dst, Address(rscratch, 0));
2732 }
2733 }
2734
2735 // AVX 3-operands instructions
2736
2737 void MacroAssembler::vaddsd(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
2738 assert(rscratch != noreg || always_reachable(src), "missing");
2739
2740 if (reachable(src)) {
2741 vaddsd(dst, nds, as_Address(src));
2742 } else {
2743 lea(rscratch, src);
2744 vaddsd(dst, nds, Address(rscratch, 0));
2745 }
2746 }
2747
2748 void MacroAssembler::vaddss(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
2749 assert(rscratch != noreg || always_reachable(src), "missing");
2750
2751 if (reachable(src)) {
2752 vaddss(dst, nds, as_Address(src));
2753 } else {
2754 lea(rscratch, src);
2755 vaddss(dst, nds, Address(rscratch, 0));
2756 }
2757 }
2758
2759 void MacroAssembler::vpaddb(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
2760 assert(UseAVX > 0, "requires some form of AVX");
2761 assert(rscratch != noreg || always_reachable(src), "missing");
2762
2763 if (reachable(src)) {
2764 Assembler::vpaddb(dst, nds, as_Address(src), vector_len);
2765 } else {
2766 lea(rscratch, src);
2767 Assembler::vpaddb(dst, nds, Address(rscratch, 0), vector_len);
2768 }
2769 }
2770
2771 void MacroAssembler::vpaddd(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
2772 assert(UseAVX > 0, "requires some form of AVX");
2773 assert(rscratch != noreg || always_reachable(src), "missing");
2774
2775 if (reachable(src)) {
2776 Assembler::vpaddd(dst, nds, as_Address(src), vector_len);
2777 } else {
2778 lea(rscratch, src);
2779 Assembler::vpaddd(dst, nds, Address(rscratch, 0), vector_len);
2780 }
2781 }
2782
2783 void MacroAssembler::vabsss(XMMRegister dst, XMMRegister nds, XMMRegister src, AddressLiteral negate_field, int vector_len, Register rscratch) {
2784 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vldq()),"XMM register should be 0-15");
2785 assert(rscratch != noreg || always_reachable(negate_field), "missing");
2786
2787 vandps(dst, nds, negate_field, vector_len, rscratch);
2788 }
2789
2790 void MacroAssembler::vabssd(XMMRegister dst, XMMRegister nds, XMMRegister src, AddressLiteral negate_field, int vector_len, Register rscratch) {
2791 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vldq()),"XMM register should be 0-15");
2792 assert(rscratch != noreg || always_reachable(negate_field), "missing");
2793
2794 vandpd(dst, nds, negate_field, vector_len, rscratch);
2795 }
2796
2797 void MacroAssembler::vpaddb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
2798 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2799 Assembler::vpaddb(dst, nds, src, vector_len);
2800 }
2801
2802 void MacroAssembler::vpaddb(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
2803 assert(((dst->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::vpaddw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
2808 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2809 Assembler::vpaddw(dst, nds, src, vector_len);
2810 }
2811
2812 void MacroAssembler::vpaddw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
2813 assert(((dst->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::vpand(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
2818 assert(rscratch != noreg || always_reachable(src), "missing");
2819
2820 if (reachable(src)) {
2821 Assembler::vpand(dst, nds, as_Address(src), vector_len);
2822 } else {
2823 lea(rscratch, src);
2824 Assembler::vpand(dst, nds, Address(rscratch, 0), vector_len);
2825 }
2826 }
2827
2828 void MacroAssembler::vpbroadcastd(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2829 assert(rscratch != noreg || always_reachable(src), "missing");
2830
2831 if (reachable(src)) {
2832 Assembler::vpbroadcastd(dst, as_Address(src), vector_len);
2833 } else {
2834 lea(rscratch, src);
2835 Assembler::vpbroadcastd(dst, Address(rscratch, 0), vector_len);
2836 }
2837 }
2838
2839 void MacroAssembler::vbroadcasti128(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2840 assert(rscratch != noreg || always_reachable(src), "missing");
2841
2842 if (reachable(src)) {
2843 Assembler::vbroadcasti128(dst, as_Address(src), vector_len);
2844 } else {
2845 lea(rscratch, src);
2846 Assembler::vbroadcasti128(dst, Address(rscratch, 0), vector_len);
2847 }
2848 }
2849
2850 void MacroAssembler::vpbroadcastq(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2851 assert(rscratch != noreg || always_reachable(src), "missing");
2852
2853 if (reachable(src)) {
2854 Assembler::vpbroadcastq(dst, as_Address(src), vector_len);
2855 } else {
2856 lea(rscratch, src);
2857 Assembler::vpbroadcastq(dst, Address(rscratch, 0), vector_len);
2858 }
2859 }
2860
2861 void MacroAssembler::vbroadcastsd(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2862 assert(rscratch != noreg || always_reachable(src), "missing");
2863
2864 if (reachable(src)) {
2865 Assembler::vbroadcastsd(dst, as_Address(src), vector_len);
2866 } else {
2867 lea(rscratch, src);
2868 Assembler::vbroadcastsd(dst, Address(rscratch, 0), vector_len);
2869 }
2870 }
2871
2872 void MacroAssembler::vbroadcastss(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) {
2873 assert(rscratch != noreg || always_reachable(src), "missing");
2874
2875 if (reachable(src)) {
2876 Assembler::vbroadcastss(dst, as_Address(src), vector_len);
2877 } else {
2878 lea(rscratch, src);
2879 Assembler::vbroadcastss(dst, Address(rscratch, 0), vector_len);
2880 }
2881 }
2882
2883 // Vector float blend
2884 // vblendvps(XMMRegister dst, XMMRegister nds, XMMRegister src, XMMRegister mask, int vector_len, bool compute_mask = true, XMMRegister scratch = xnoreg)
2885 void MacroAssembler::vblendvps(XMMRegister dst, XMMRegister src1, XMMRegister src2, XMMRegister mask, int vector_len, bool compute_mask, XMMRegister scratch) {
2886 // WARN: Allow dst == (src1|src2), mask == scratch
2887 bool blend_emulation = EnableX86ECoreOpts && UseAVX > 1;
2888 bool scratch_available = scratch != xnoreg && scratch != src1 && scratch != src2 && scratch != dst;
2889 bool dst_available = dst != mask && (dst != src1 || dst != src2);
2890 if (blend_emulation && scratch_available && dst_available) {
2891 if (compute_mask) {
2892 vpsrad(scratch, mask, 32, vector_len);
2893 mask = scratch;
2894 }
2895 if (dst == src1) {
2896 vpandn(dst, mask, src1, vector_len); // if mask == 0, src1
2897 vpand (scratch, mask, src2, vector_len); // if mask == 1, src2
2898 } else {
2899 vpand (dst, mask, src2, vector_len); // if mask == 1, src2
2900 vpandn(scratch, mask, src1, vector_len); // if mask == 0, src1
2901 }
2902 vpor(dst, dst, scratch, vector_len);
2903 } else {
2904 Assembler::vblendvps(dst, src1, src2, mask, vector_len);
2905 }
2906 }
2907
2908 // vblendvpd(XMMRegister dst, XMMRegister nds, XMMRegister src, XMMRegister mask, int vector_len, bool compute_mask = true, XMMRegister scratch = xnoreg)
2909 void MacroAssembler::vblendvpd(XMMRegister dst, XMMRegister src1, XMMRegister src2, XMMRegister mask, int vector_len, bool compute_mask, XMMRegister scratch) {
2910 // WARN: Allow dst == (src1|src2), mask == scratch
2911 bool blend_emulation = EnableX86ECoreOpts && UseAVX > 1;
2912 bool scratch_available = scratch != xnoreg && scratch != src1 && scratch != src2 && scratch != dst && (!compute_mask || scratch != mask);
2913 bool dst_available = dst != mask && (dst != src1 || dst != src2);
2914 if (blend_emulation && scratch_available && dst_available) {
2915 if (compute_mask) {
2916 vpxor(scratch, scratch, scratch, vector_len);
2917 vpcmpgtq(scratch, scratch, mask, vector_len);
2918 mask = scratch;
2919 }
2920 if (dst == src1) {
2921 vpandn(dst, mask, src1, vector_len); // if mask == 0, src
2922 vpand (scratch, mask, src2, vector_len); // if mask == 1, src2
2923 } else {
2924 vpand (dst, mask, src2, vector_len); // if mask == 1, src2
2925 vpandn(scratch, mask, src1, vector_len); // if mask == 0, src
2926 }
2927 vpor(dst, dst, scratch, vector_len);
2928 } else {
2929 Assembler::vblendvpd(dst, src1, src2, mask, vector_len);
2930 }
2931 }
2932
2933 void MacroAssembler::vpcmpeqb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
2934 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2935 Assembler::vpcmpeqb(dst, nds, src, vector_len);
2936 }
2937
2938 void MacroAssembler::vpcmpeqb(XMMRegister dst, XMMRegister src1, Address src2, int vector_len) {
2939 assert(((dst->encoding() < 16 && src1->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2940 Assembler::vpcmpeqb(dst, src1, src2, vector_len);
2941 }
2942
2943 void MacroAssembler::vpcmpeqw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
2944 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2945 Assembler::vpcmpeqw(dst, nds, src, vector_len);
2946 }
2947
2948 void MacroAssembler::vpcmpeqw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
2949 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
2950 Assembler::vpcmpeqw(dst, nds, src, vector_len);
2951 }
2952
2953 void MacroAssembler::evpcmpeqd(KRegister kdst, KRegister mask, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
2954 assert(rscratch != noreg || always_reachable(src), "missing");
2955
2956 if (reachable(src)) {
2957 Assembler::evpcmpeqd(kdst, mask, nds, as_Address(src), vector_len);
2958 } else {
2959 lea(rscratch, src);
2960 Assembler::evpcmpeqd(kdst, mask, nds, Address(rscratch, 0), vector_len);
2961 }
2962 }
2963
2964 void MacroAssembler::evpcmpd(KRegister kdst, KRegister mask, XMMRegister nds, AddressLiteral src,
2965 int comparison, bool is_signed, int vector_len, Register rscratch) {
2966 assert(rscratch != noreg || always_reachable(src), "missing");
2967
2968 if (reachable(src)) {
2969 Assembler::evpcmpd(kdst, mask, nds, as_Address(src), comparison, is_signed, vector_len);
2970 } else {
2971 lea(rscratch, src);
2972 Assembler::evpcmpd(kdst, mask, nds, Address(rscratch, 0), comparison, is_signed, vector_len);
2973 }
2974 }
2975
2976 void MacroAssembler::evpcmpq(KRegister kdst, KRegister mask, XMMRegister nds, AddressLiteral src,
2977 int comparison, bool is_signed, int vector_len, Register rscratch) {
2978 assert(rscratch != noreg || always_reachable(src), "missing");
2979
2980 if (reachable(src)) {
2981 Assembler::evpcmpq(kdst, mask, nds, as_Address(src), comparison, is_signed, vector_len);
2982 } else {
2983 lea(rscratch, src);
2984 Assembler::evpcmpq(kdst, mask, nds, Address(rscratch, 0), comparison, is_signed, vector_len);
2985 }
2986 }
2987
2988 void MacroAssembler::evpcmpb(KRegister kdst, KRegister mask, XMMRegister nds, AddressLiteral src,
2989 int comparison, bool is_signed, int vector_len, Register rscratch) {
2990 assert(rscratch != noreg || always_reachable(src), "missing");
2991
2992 if (reachable(src)) {
2993 Assembler::evpcmpb(kdst, mask, nds, as_Address(src), comparison, is_signed, vector_len);
2994 } else {
2995 lea(rscratch, src);
2996 Assembler::evpcmpb(kdst, mask, nds, Address(rscratch, 0), comparison, is_signed, vector_len);
2997 }
2998 }
2999
3000 void MacroAssembler::evpcmpw(KRegister kdst, KRegister mask, XMMRegister nds, AddressLiteral src,
3001 int comparison, bool is_signed, int vector_len, Register rscratch) {
3002 assert(rscratch != noreg || always_reachable(src), "missing");
3003
3004 if (reachable(src)) {
3005 Assembler::evpcmpw(kdst, mask, nds, as_Address(src), comparison, is_signed, vector_len);
3006 } else {
3007 lea(rscratch, src);
3008 Assembler::evpcmpw(kdst, mask, nds, Address(rscratch, 0), comparison, is_signed, vector_len);
3009 }
3010 }
3011
3012 void MacroAssembler::vpcmpCC(XMMRegister dst, XMMRegister nds, XMMRegister src, int cond_encoding, Width width, int vector_len) {
3013 if (width == Assembler::Q) {
3014 Assembler::vpcmpCCq(dst, nds, src, cond_encoding, vector_len);
3015 } else {
3016 Assembler::vpcmpCCbwd(dst, nds, src, cond_encoding, vector_len);
3017 }
3018 }
3019
3020 void MacroAssembler::vpcmpCCW(XMMRegister dst, XMMRegister nds, XMMRegister src, XMMRegister xtmp, ComparisonPredicate cond, Width width, int vector_len) {
3021 int eq_cond_enc = 0x29;
3022 int gt_cond_enc = 0x37;
3023 if (width != Assembler::Q) {
3024 eq_cond_enc = 0x74 + width;
3025 gt_cond_enc = 0x64 + width;
3026 }
3027 switch (cond) {
3028 case eq:
3029 vpcmpCC(dst, nds, src, eq_cond_enc, width, vector_len);
3030 break;
3031 case neq:
3032 vpcmpCC(dst, nds, src, eq_cond_enc, width, vector_len);
3033 vallones(xtmp, vector_len);
3034 vpxor(dst, xtmp, dst, vector_len);
3035 break;
3036 case le:
3037 vpcmpCC(dst, nds, src, gt_cond_enc, width, vector_len);
3038 vallones(xtmp, vector_len);
3039 vpxor(dst, xtmp, dst, vector_len);
3040 break;
3041 case nlt:
3042 vpcmpCC(dst, src, nds, gt_cond_enc, width, vector_len);
3043 vallones(xtmp, vector_len);
3044 vpxor(dst, xtmp, dst, vector_len);
3045 break;
3046 case lt:
3047 vpcmpCC(dst, src, nds, gt_cond_enc, width, vector_len);
3048 break;
3049 case nle:
3050 vpcmpCC(dst, nds, src, gt_cond_enc, width, vector_len);
3051 break;
3052 default:
3053 assert(false, "Should not reach here");
3054 }
3055 }
3056
3057 void MacroAssembler::vpmovzxbw(XMMRegister dst, Address src, int vector_len) {
3058 assert(((dst->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3059 Assembler::vpmovzxbw(dst, src, vector_len);
3060 }
3061
3062 void MacroAssembler::vpmovmskb(Register dst, XMMRegister src, int vector_len) {
3063 assert((src->encoding() < 16),"XMM register should be 0-15");
3064 Assembler::vpmovmskb(dst, src, vector_len);
3065 }
3066
3067 void MacroAssembler::vpmullw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
3068 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3069 Assembler::vpmullw(dst, nds, src, vector_len);
3070 }
3071
3072 void MacroAssembler::vpmullw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
3073 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3074 Assembler::vpmullw(dst, nds, src, vector_len);
3075 }
3076
3077 void MacroAssembler::vpmulld(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3078 assert((UseAVX > 0), "AVX support is needed");
3079 assert(rscratch != noreg || always_reachable(src), "missing");
3080
3081 if (reachable(src)) {
3082 Assembler::vpmulld(dst, nds, as_Address(src), vector_len);
3083 } else {
3084 lea(rscratch, src);
3085 Assembler::vpmulld(dst, nds, Address(rscratch, 0), vector_len);
3086 }
3087 }
3088
3089 void MacroAssembler::vpsubb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
3090 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3091 Assembler::vpsubb(dst, nds, src, vector_len);
3092 }
3093
3094 void MacroAssembler::vpsubb(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
3095 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3096 Assembler::vpsubb(dst, nds, src, vector_len);
3097 }
3098
3099 void MacroAssembler::vpsubw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) {
3100 assert(((dst->encoding() < 16 && src->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3101 Assembler::vpsubw(dst, nds, src, vector_len);
3102 }
3103
3104 void MacroAssembler::vpsubw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) {
3105 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3106 Assembler::vpsubw(dst, nds, src, vector_len);
3107 }
3108
3109 void MacroAssembler::vpsraw(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) {
3110 assert(((dst->encoding() < 16 && shift->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3111 Assembler::vpsraw(dst, nds, shift, vector_len);
3112 }
3113
3114 void MacroAssembler::vpsraw(XMMRegister dst, XMMRegister nds, int shift, int vector_len) {
3115 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3116 Assembler::vpsraw(dst, nds, shift, vector_len);
3117 }
3118
3119 void MacroAssembler::evpsraq(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) {
3120 assert(UseAVX > 2,"");
3121 if (!VM_Version::supports_avx512vl() && vector_len < 2) {
3122 vector_len = 2;
3123 }
3124 Assembler::evpsraq(dst, nds, shift, vector_len);
3125 }
3126
3127 void MacroAssembler::evpsraq(XMMRegister dst, XMMRegister nds, int shift, int vector_len) {
3128 assert(UseAVX > 2,"");
3129 if (!VM_Version::supports_avx512vl() && vector_len < 2) {
3130 vector_len = 2;
3131 }
3132 Assembler::evpsraq(dst, nds, shift, vector_len);
3133 }
3134
3135 void MacroAssembler::vpsrlw(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) {
3136 assert(((dst->encoding() < 16 && shift->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3137 Assembler::vpsrlw(dst, nds, shift, vector_len);
3138 }
3139
3140 void MacroAssembler::vpsrlw(XMMRegister dst, XMMRegister nds, int shift, int vector_len) {
3141 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3142 Assembler::vpsrlw(dst, nds, shift, vector_len);
3143 }
3144
3145 void MacroAssembler::vpsllw(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) {
3146 assert(((dst->encoding() < 16 && shift->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3147 Assembler::vpsllw(dst, nds, shift, vector_len);
3148 }
3149
3150 void MacroAssembler::vpsllw(XMMRegister dst, XMMRegister nds, int shift, int vector_len) {
3151 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3152 Assembler::vpsllw(dst, nds, shift, vector_len);
3153 }
3154
3155 void MacroAssembler::vptest(XMMRegister dst, XMMRegister src) {
3156 assert((dst->encoding() < 16 && src->encoding() < 16),"XMM register should be 0-15");
3157 Assembler::vptest(dst, src);
3158 }
3159
3160 void MacroAssembler::punpcklbw(XMMRegister dst, XMMRegister src) {
3161 assert(((dst->encoding() < 16 && src->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3162 Assembler::punpcklbw(dst, src);
3163 }
3164
3165 void MacroAssembler::pshufd(XMMRegister dst, Address src, int mode) {
3166 assert(((dst->encoding() < 16) || VM_Version::supports_avx512vl()),"XMM register should be 0-15");
3167 Assembler::pshufd(dst, src, mode);
3168 }
3169
3170 void MacroAssembler::pshuflw(XMMRegister dst, XMMRegister src, int mode) {
3171 assert(((dst->encoding() < 16 && src->encoding() < 16) || VM_Version::supports_avx512vlbw()),"XMM register should be 0-15");
3172 Assembler::pshuflw(dst, src, mode);
3173 }
3174
3175 void MacroAssembler::vandpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3176 assert(rscratch != noreg || always_reachable(src), "missing");
3177
3178 if (reachable(src)) {
3179 vandpd(dst, nds, as_Address(src), vector_len);
3180 } else {
3181 lea(rscratch, src);
3182 vandpd(dst, nds, Address(rscratch, 0), vector_len);
3183 }
3184 }
3185
3186 void MacroAssembler::vandps(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3187 assert(rscratch != noreg || always_reachable(src), "missing");
3188
3189 if (reachable(src)) {
3190 vandps(dst, nds, as_Address(src), vector_len);
3191 } else {
3192 lea(rscratch, src);
3193 vandps(dst, nds, Address(rscratch, 0), vector_len);
3194 }
3195 }
3196
3197 void MacroAssembler::evpord(XMMRegister dst, KRegister mask, XMMRegister nds, AddressLiteral src,
3198 bool merge, int vector_len, Register rscratch) {
3199 assert(rscratch != noreg || always_reachable(src), "missing");
3200
3201 if (reachable(src)) {
3202 Assembler::evpord(dst, mask, nds, as_Address(src), merge, vector_len);
3203 } else {
3204 lea(rscratch, src);
3205 Assembler::evpord(dst, mask, nds, Address(rscratch, 0), merge, vector_len);
3206 }
3207 }
3208
3209 void MacroAssembler::vdivsd(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3210 assert(rscratch != noreg || always_reachable(src), "missing");
3211
3212 if (reachable(src)) {
3213 vdivsd(dst, nds, as_Address(src));
3214 } else {
3215 lea(rscratch, src);
3216 vdivsd(dst, nds, Address(rscratch, 0));
3217 }
3218 }
3219
3220 void MacroAssembler::vdivss(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3221 assert(rscratch != noreg || always_reachable(src), "missing");
3222
3223 if (reachable(src)) {
3224 vdivss(dst, nds, as_Address(src));
3225 } else {
3226 lea(rscratch, src);
3227 vdivss(dst, nds, Address(rscratch, 0));
3228 }
3229 }
3230
3231 void MacroAssembler::vmulsd(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3232 assert(rscratch != noreg || always_reachable(src), "missing");
3233
3234 if (reachable(src)) {
3235 vmulsd(dst, nds, as_Address(src));
3236 } else {
3237 lea(rscratch, src);
3238 vmulsd(dst, nds, Address(rscratch, 0));
3239 }
3240 }
3241
3242 void MacroAssembler::vmulss(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3243 assert(rscratch != noreg || always_reachable(src), "missing");
3244
3245 if (reachable(src)) {
3246 vmulss(dst, nds, as_Address(src));
3247 } else {
3248 lea(rscratch, src);
3249 vmulss(dst, nds, Address(rscratch, 0));
3250 }
3251 }
3252
3253 void MacroAssembler::vsubsd(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3254 assert(rscratch != noreg || always_reachable(src), "missing");
3255
3256 if (reachable(src)) {
3257 vsubsd(dst, nds, as_Address(src));
3258 } else {
3259 lea(rscratch, src);
3260 vsubsd(dst, nds, Address(rscratch, 0));
3261 }
3262 }
3263
3264 void MacroAssembler::vsubss(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3265 assert(rscratch != noreg || always_reachable(src), "missing");
3266
3267 if (reachable(src)) {
3268 vsubss(dst, nds, as_Address(src));
3269 } else {
3270 lea(rscratch, src);
3271 vsubss(dst, nds, Address(rscratch, 0));
3272 }
3273 }
3274
3275 void MacroAssembler::vnegatess(XMMRegister dst, XMMRegister nds, AddressLiteral src, Register rscratch) {
3276 assert(((dst->encoding() < 16 && nds->encoding() < 16) || VM_Version::supports_avx512vldq()),"XMM register should be 0-15");
3277 assert(rscratch != noreg || always_reachable(src), "missing");
3278
3279 vxorps(dst, nds, src, Assembler::AVX_128bit, rscratch);
3280 }
3281
3282 void MacroAssembler::vnegatesd(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 vxorpd(dst, nds, src, Assembler::AVX_128bit, rscratch);
3287 }
3288
3289 void MacroAssembler::vxorpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3290 assert(rscratch != noreg || always_reachable(src), "missing");
3291
3292 if (reachable(src)) {
3293 vxorpd(dst, nds, as_Address(src), vector_len);
3294 } else {
3295 lea(rscratch, src);
3296 vxorpd(dst, nds, Address(rscratch, 0), vector_len);
3297 }
3298 }
3299
3300 void MacroAssembler::vxorps(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3301 assert(rscratch != noreg || always_reachable(src), "missing");
3302
3303 if (reachable(src)) {
3304 vxorps(dst, nds, as_Address(src), vector_len);
3305 } else {
3306 lea(rscratch, src);
3307 vxorps(dst, nds, Address(rscratch, 0), vector_len);
3308 }
3309 }
3310
3311 void MacroAssembler::vpxor(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3312 assert(rscratch != noreg || always_reachable(src), "missing");
3313
3314 if (UseAVX > 1 || (vector_len < 1)) {
3315 if (reachable(src)) {
3316 Assembler::vpxor(dst, nds, as_Address(src), vector_len);
3317 } else {
3318 lea(rscratch, src);
3319 Assembler::vpxor(dst, nds, Address(rscratch, 0), vector_len);
3320 }
3321 } else {
3322 MacroAssembler::vxorpd(dst, nds, src, vector_len, rscratch);
3323 }
3324 }
3325
3326 void MacroAssembler::vpermd(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
3327 assert(rscratch != noreg || always_reachable(src), "missing");
3328
3329 if (reachable(src)) {
3330 Assembler::vpermd(dst, nds, as_Address(src), vector_len);
3331 } else {
3332 lea(rscratch, src);
3333 Assembler::vpermd(dst, nds, Address(rscratch, 0), vector_len);
3334 }
3335 }
3336
3337 void MacroAssembler::clear_jobject_tag(Register possibly_non_local) {
3338 const int32_t inverted_mask = ~static_cast<int32_t>(JNIHandles::tag_mask);
3339 STATIC_ASSERT(inverted_mask == -4); // otherwise check this code
3340 // The inverted mask is sign-extended
3341 andptr(possibly_non_local, inverted_mask);
3342 }
3343
3344 void MacroAssembler::resolve_jobject(Register value,
3345 Register tmp) {
3346 Register thread = r15_thread;
3347 assert_different_registers(value, thread, tmp);
3348 Label done, tagged, weak_tagged;
3349 testptr(value, value);
3350 jcc(Assembler::zero, done); // Use null as-is.
3351 testptr(value, JNIHandles::tag_mask); // Test for tag.
3352 jcc(Assembler::notZero, tagged);
3353
3354 // Resolve local handle
3355 access_load_at(T_OBJECT, IN_NATIVE | AS_RAW, value, Address(value, 0), tmp);
3356 verify_oop(value);
3357 jmp(done);
3358
3359 bind(tagged);
3360 testptr(value, JNIHandles::TypeTag::weak_global); // Test for weak tag.
3361 jcc(Assembler::notZero, weak_tagged);
3362
3363 // Resolve global handle
3364 access_load_at(T_OBJECT, IN_NATIVE, value, Address(value, -JNIHandles::TypeTag::global), tmp);
3365 verify_oop(value);
3366 jmp(done);
3367
3368 bind(weak_tagged);
3369 // Resolve jweak.
3370 access_load_at(T_OBJECT, IN_NATIVE | ON_PHANTOM_OOP_REF,
3371 value, Address(value, -JNIHandles::TypeTag::weak_global), tmp);
3372 verify_oop(value);
3373
3374 bind(done);
3375 }
3376
3377 void MacroAssembler::resolve_global_jobject(Register value,
3378 Register tmp) {
3379 Register thread = r15_thread;
3380 assert_different_registers(value, thread, tmp);
3381 Label done;
3382
3383 testptr(value, value);
3384 jcc(Assembler::zero, done); // Use null as-is.
3385
3386 #ifdef ASSERT
3387 {
3388 Label valid_global_tag;
3389 testptr(value, JNIHandles::TypeTag::global); // Test for global tag.
3390 jcc(Assembler::notZero, valid_global_tag);
3391 stop("non global jobject using resolve_global_jobject");
3392 bind(valid_global_tag);
3393 }
3394 #endif
3395
3396 // Resolve global handle
3397 access_load_at(T_OBJECT, IN_NATIVE, value, Address(value, -JNIHandles::TypeTag::global), tmp);
3398 verify_oop(value);
3399
3400 bind(done);
3401 }
3402
3403 void MacroAssembler::subptr(Register dst, int32_t imm32) {
3404 subq(dst, imm32);
3405 }
3406
3407 // Force generation of a 4 byte immediate value even if it fits into 8bit
3408 void MacroAssembler::subptr_imm32(Register dst, int32_t imm32) {
3409 subq_imm32(dst, imm32);
3410 }
3411
3412 void MacroAssembler::subptr(Register dst, Register src) {
3413 subq(dst, src);
3414 }
3415
3416 // C++ bool manipulation
3417 void MacroAssembler::testbool(Register dst) {
3418 if(sizeof(bool) == 1)
3419 testb(dst, 0xff);
3420 else if(sizeof(bool) == 2) {
3421 // testw implementation needed for two byte bools
3422 ShouldNotReachHere();
3423 } else if(sizeof(bool) == 4)
3424 testl(dst, dst);
3425 else
3426 // unsupported
3427 ShouldNotReachHere();
3428 }
3429
3430 void MacroAssembler::testptr(Register dst, Register src) {
3431 testq(dst, src);
3432 }
3433
3434 // Defines obj, preserves var_size_in_bytes, okay for t2 == var_size_in_bytes.
3435 void MacroAssembler::tlab_allocate(Register obj,
3436 Register var_size_in_bytes,
3437 int con_size_in_bytes,
3438 Register t1,
3439 Register t2,
3440 Label& slow_case) {
3441 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
3442 bs->tlab_allocate(this, obj, var_size_in_bytes, con_size_in_bytes, t1, t2, slow_case);
3443 }
3444
3445 RegSet MacroAssembler::call_clobbered_gp_registers() {
3446 RegSet regs;
3447 regs += RegSet::of(rax, rcx, rdx);
3448 #ifndef _WINDOWS
3449 regs += RegSet::of(rsi, rdi);
3450 #endif
3451 regs += RegSet::range(r8, r11);
3452 if (UseAPX) {
3453 regs += RegSet::range(r16, as_Register(Register::number_of_registers - 1));
3454 }
3455 return regs;
3456 }
3457
3458 XMMRegSet MacroAssembler::call_clobbered_xmm_registers() {
3459 int num_xmm_registers = XMMRegister::available_xmm_registers();
3460 #if defined(_WINDOWS)
3461 XMMRegSet result = XMMRegSet::range(xmm0, xmm5);
3462 if (num_xmm_registers > 16) {
3463 result += XMMRegSet::range(xmm16, as_XMMRegister(num_xmm_registers - 1));
3464 }
3465 return result;
3466 #else
3467 return XMMRegSet::range(xmm0, as_XMMRegister(num_xmm_registers - 1));
3468 #endif
3469 }
3470
3471 // C1 only ever uses the first double/float of the XMM register.
3472 static int xmm_save_size() { return sizeof(double); }
3473
3474 static void save_xmm_register(MacroAssembler* masm, int offset, XMMRegister reg) {
3475 masm->movdbl(Address(rsp, offset), reg);
3476 }
3477
3478 static void restore_xmm_register(MacroAssembler* masm, int offset, XMMRegister reg) {
3479 masm->movdbl(reg, Address(rsp, offset));
3480 }
3481
3482 static int register_section_sizes(RegSet gp_registers, XMMRegSet xmm_registers,
3483 bool save_fpu, int& gp_area_size, int& xmm_area_size) {
3484
3485 gp_area_size = align_up(gp_registers.size() * Register::max_slots_per_register * VMRegImpl::stack_slot_size,
3486 StackAlignmentInBytes);
3487 xmm_area_size = save_fpu ? xmm_registers.size() * xmm_save_size() : 0;
3488
3489 return gp_area_size + xmm_area_size;
3490 }
3491
3492 void MacroAssembler::push_call_clobbered_registers_except(RegSet exclude, bool save_fpu) {
3493 block_comment("push_call_clobbered_registers start");
3494 // Regular registers
3495 RegSet gp_registers_to_push = call_clobbered_gp_registers() - exclude;
3496
3497 int gp_area_size;
3498 int xmm_area_size;
3499 int total_save_size = register_section_sizes(gp_registers_to_push, call_clobbered_xmm_registers(), save_fpu,
3500 gp_area_size, xmm_area_size);
3501 subptr(rsp, total_save_size);
3502
3503 push_set(gp_registers_to_push, 0);
3504
3505 if (save_fpu) {
3506 push_set(call_clobbered_xmm_registers(), gp_area_size);
3507 }
3508
3509 block_comment("push_call_clobbered_registers end");
3510 }
3511
3512 void MacroAssembler::pop_call_clobbered_registers_except(RegSet exclude, bool restore_fpu) {
3513 block_comment("pop_call_clobbered_registers start");
3514
3515 RegSet gp_registers_to_pop = call_clobbered_gp_registers() - exclude;
3516
3517 int gp_area_size;
3518 int xmm_area_size;
3519 int total_save_size = register_section_sizes(gp_registers_to_pop, call_clobbered_xmm_registers(), restore_fpu,
3520 gp_area_size, xmm_area_size);
3521
3522 if (restore_fpu) {
3523 pop_set(call_clobbered_xmm_registers(), gp_area_size);
3524 }
3525
3526 pop_set(gp_registers_to_pop, 0);
3527
3528 addptr(rsp, total_save_size);
3529
3530 vzeroupper();
3531
3532 block_comment("pop_call_clobbered_registers end");
3533 }
3534
3535 void MacroAssembler::push_set(XMMRegSet set, int offset) {
3536 assert(is_aligned(set.size() * xmm_save_size(), StackAlignmentInBytes), "must be");
3537 int spill_offset = offset;
3538
3539 for (RegSetIterator<XMMRegister> it = set.begin(); *it != xnoreg; ++it) {
3540 save_xmm_register(this, spill_offset, *it);
3541 spill_offset += xmm_save_size();
3542 }
3543 }
3544
3545 void MacroAssembler::pop_set(XMMRegSet set, int offset) {
3546 int restore_size = set.size() * xmm_save_size();
3547 assert(is_aligned(restore_size, StackAlignmentInBytes), "must be");
3548
3549 int restore_offset = offset + restore_size - xmm_save_size();
3550
3551 for (ReverseRegSetIterator<XMMRegister> it = set.rbegin(); *it != xnoreg; ++it) {
3552 restore_xmm_register(this, restore_offset, *it);
3553 restore_offset -= xmm_save_size();
3554 }
3555 }
3556
3557 void MacroAssembler::push_set(RegSet set, int offset) {
3558 int spill_offset;
3559 if (offset == -1) {
3560 int register_push_size = set.size() * Register::max_slots_per_register * VMRegImpl::stack_slot_size;
3561 int aligned_size = align_up(register_push_size, StackAlignmentInBytes);
3562 subptr(rsp, aligned_size);
3563 spill_offset = 0;
3564 } else {
3565 spill_offset = offset;
3566 }
3567
3568 for (RegSetIterator<Register> it = set.begin(); *it != noreg; ++it) {
3569 movptr(Address(rsp, spill_offset), *it);
3570 spill_offset += Register::max_slots_per_register * VMRegImpl::stack_slot_size;
3571 }
3572 }
3573
3574 void MacroAssembler::pop_set(RegSet set, int offset) {
3575
3576 int gp_reg_size = Register::max_slots_per_register * VMRegImpl::stack_slot_size;
3577 int restore_size = set.size() * gp_reg_size;
3578 int aligned_size = align_up(restore_size, StackAlignmentInBytes);
3579
3580 int restore_offset;
3581 if (offset == -1) {
3582 restore_offset = restore_size - gp_reg_size;
3583 } else {
3584 restore_offset = offset + restore_size - gp_reg_size;
3585 }
3586 for (ReverseRegSetIterator<Register> it = set.rbegin(); *it != noreg; ++it) {
3587 movptr(*it, Address(rsp, restore_offset));
3588 restore_offset -= gp_reg_size;
3589 }
3590
3591 if (offset == -1) {
3592 addptr(rsp, aligned_size);
3593 }
3594 }
3595
3596 // Preserves the contents of address, destroys the contents length_in_bytes and temp.
3597 void MacroAssembler::zero_memory(Register address, Register length_in_bytes, int offset_in_bytes, Register temp) {
3598 assert(address != length_in_bytes && address != temp && temp != length_in_bytes, "registers must be different");
3599 assert((offset_in_bytes & (BytesPerWord - 1)) == 0, "offset must be a multiple of BytesPerWord");
3600 Label done;
3601
3602 testptr(length_in_bytes, length_in_bytes);
3603 jcc(Assembler::zero, done);
3604
3605 // initialize topmost word, divide index by 2, check if odd and test if zero
3606 // note: for the remaining code to work, index must be a multiple of BytesPerWord
3607 #ifdef ASSERT
3608 {
3609 Label L;
3610 testptr(length_in_bytes, BytesPerWord - 1);
3611 jcc(Assembler::zero, L);
3612 stop("length must be a multiple of BytesPerWord");
3613 bind(L);
3614 }
3615 #endif
3616 Register index = length_in_bytes;
3617 xorptr(temp, temp); // use _zero reg to clear memory (shorter code)
3618 if (UseIncDec) {
3619 shrptr(index, 3); // divide by 8/16 and set carry flag if bit 2 was set
3620 } else {
3621 shrptr(index, 2); // use 2 instructions to avoid partial flag stall
3622 shrptr(index, 1);
3623 }
3624
3625 // initialize remaining object fields: index is a multiple of 2 now
3626 {
3627 Label loop;
3628 bind(loop);
3629 movptr(Address(address, index, Address::times_8, offset_in_bytes - 1*BytesPerWord), temp);
3630 decrement(index);
3631 jcc(Assembler::notZero, loop);
3632 }
3633
3634 bind(done);
3635 }
3636
3637 // Look up the method for a megamorphic invokeinterface call.
3638 // The target method is determined by <intf_klass, itable_index>.
3639 // The receiver klass is in recv_klass.
3640 // On success, the result will be in method_result, and execution falls through.
3641 // On failure, execution transfers to the given label.
3642 void MacroAssembler::lookup_interface_method(Register recv_klass,
3643 Register intf_klass,
3644 RegisterOrConstant itable_index,
3645 Register method_result,
3646 Register scan_temp,
3647 Label& L_no_such_interface,
3648 bool return_method) {
3649 assert_different_registers(recv_klass, intf_klass, scan_temp);
3650 assert_different_registers(method_result, intf_klass, scan_temp);
3651 assert(recv_klass != method_result || !return_method,
3652 "recv_klass can be destroyed when method isn't needed");
3653
3654 assert(itable_index.is_constant() || itable_index.as_register() == method_result,
3655 "caller must use same register for non-constant itable index as for method");
3656
3657 // Compute start of first itableOffsetEntry (which is at the end of the vtable)
3658 int vtable_base = in_bytes(Klass::vtable_start_offset());
3659 int itentry_off = in_bytes(itableMethodEntry::method_offset());
3660 int scan_step = itableOffsetEntry::size() * wordSize;
3661 int vte_size = vtableEntry::size_in_bytes();
3662 Address::ScaleFactor times_vte_scale = Address::times_ptr;
3663 assert(vte_size == wordSize, "else adjust times_vte_scale");
3664
3665 movl(scan_temp, Address(recv_klass, Klass::vtable_length_offset()));
3666
3667 // Could store the aligned, prescaled offset in the klass.
3668 lea(scan_temp, Address(recv_klass, scan_temp, times_vte_scale, vtable_base));
3669
3670 if (return_method) {
3671 // Adjust recv_klass by scaled itable_index, so we can free itable_index.
3672 assert(itableMethodEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
3673 lea(recv_klass, Address(recv_klass, itable_index, Address::times_ptr, itentry_off));
3674 }
3675
3676 // for (scan = klass->itable(); scan->interface() != nullptr; scan += scan_step) {
3677 // if (scan->interface() == intf) {
3678 // result = (klass + scan->offset() + itable_index);
3679 // }
3680 // }
3681 Label search, found_method;
3682
3683 for (int peel = 1; peel >= 0; peel--) {
3684 movptr(method_result, Address(scan_temp, itableOffsetEntry::interface_offset()));
3685 cmpptr(intf_klass, method_result);
3686
3687 if (peel) {
3688 jccb(Assembler::equal, found_method);
3689 } else {
3690 jccb(Assembler::notEqual, search);
3691 // (invert the test to fall through to found_method...)
3692 }
3693
3694 if (!peel) break;
3695
3696 bind(search);
3697
3698 // Check that the previous entry is non-null. A null entry means that
3699 // the receiver class doesn't implement the interface, and wasn't the
3700 // same as when the caller was compiled.
3701 testptr(method_result, method_result);
3702 jcc(Assembler::zero, L_no_such_interface);
3703 addptr(scan_temp, scan_step);
3704 }
3705
3706 bind(found_method);
3707
3708 if (return_method) {
3709 // Got a hit.
3710 movl(scan_temp, Address(scan_temp, itableOffsetEntry::offset_offset()));
3711 movptr(method_result, Address(recv_klass, scan_temp, Address::times_1));
3712 }
3713 }
3714
3715 // Look up the method for a megamorphic invokeinterface call in a single pass over itable:
3716 // - check recv_klass (actual object class) is a subtype of resolved_klass from CompiledICData
3717 // - find a holder_klass (class that implements the method) vtable offset and get the method from vtable by index
3718 // The target method is determined by <holder_klass, itable_index>.
3719 // The receiver klass is in recv_klass.
3720 // On success, the result will be in method_result, and execution falls through.
3721 // On failure, execution transfers to the given label.
3722 void MacroAssembler::lookup_interface_method_stub(Register recv_klass,
3723 Register holder_klass,
3724 Register resolved_klass,
3725 Register method_result,
3726 Register scan_temp,
3727 Register temp_reg2,
3728 Register receiver,
3729 int itable_index,
3730 Label& L_no_such_interface) {
3731 assert_different_registers(recv_klass, method_result, holder_klass, resolved_klass, scan_temp, temp_reg2, receiver);
3732 Register temp_itbl_klass = method_result;
3733 Register temp_reg = (temp_reg2 == noreg ? recv_klass : temp_reg2); // reuse recv_klass register on 32-bit x86 impl
3734
3735 int vtable_base = in_bytes(Klass::vtable_start_offset());
3736 int itentry_off = in_bytes(itableMethodEntry::method_offset());
3737 int scan_step = itableOffsetEntry::size() * wordSize;
3738 int vte_size = vtableEntry::size_in_bytes();
3739 int ioffset = in_bytes(itableOffsetEntry::interface_offset());
3740 int ooffset = in_bytes(itableOffsetEntry::offset_offset());
3741 Address::ScaleFactor times_vte_scale = Address::times_ptr;
3742 assert(vte_size == wordSize, "adjust times_vte_scale");
3743
3744 Label L_loop_scan_resolved_entry, L_resolved_found, L_holder_found;
3745
3746 // temp_itbl_klass = recv_klass.itable[0]
3747 // scan_temp = &recv_klass.itable[0] + step
3748 movl(scan_temp, Address(recv_klass, Klass::vtable_length_offset()));
3749 movptr(temp_itbl_klass, Address(recv_klass, scan_temp, times_vte_scale, vtable_base + ioffset));
3750 lea(scan_temp, Address(recv_klass, scan_temp, times_vte_scale, vtable_base + ioffset + scan_step));
3751 xorptr(temp_reg, temp_reg);
3752
3753 // Initial checks:
3754 // - if (holder_klass != resolved_klass), go to "scan for resolved"
3755 // - if (itable[0] == 0), no such interface
3756 // - if (itable[0] == holder_klass), shortcut to "holder found"
3757 cmpptr(holder_klass, resolved_klass);
3758 jccb(Assembler::notEqual, L_loop_scan_resolved_entry);
3759 testptr(temp_itbl_klass, temp_itbl_klass);
3760 jccb(Assembler::zero, L_no_such_interface);
3761 cmpptr(holder_klass, temp_itbl_klass);
3762 jccb(Assembler::equal, L_holder_found);
3763
3764 // Loop: Look for holder_klass record in itable
3765 // do {
3766 // tmp = itable[index];
3767 // index += step;
3768 // if (tmp == holder_klass) {
3769 // goto L_holder_found; // Found!
3770 // }
3771 // } while (tmp != 0);
3772 // goto L_no_such_interface // Not found.
3773 Label L_scan_holder;
3774 bind(L_scan_holder);
3775 movptr(temp_itbl_klass, Address(scan_temp, 0));
3776 addptr(scan_temp, scan_step);
3777 cmpptr(holder_klass, temp_itbl_klass);
3778 jccb(Assembler::equal, L_holder_found);
3779 testptr(temp_itbl_klass, temp_itbl_klass);
3780 jccb(Assembler::notZero, L_scan_holder);
3781
3782 jmpb(L_no_such_interface);
3783
3784 // Loop: Look for resolved_class record in itable
3785 // do {
3786 // tmp = itable[index];
3787 // index += step;
3788 // if (tmp == holder_klass) {
3789 // // Also check if we have met a holder klass
3790 // holder_tmp = itable[index-step-ioffset];
3791 // }
3792 // if (tmp == resolved_klass) {
3793 // goto L_resolved_found; // Found!
3794 // }
3795 // } while (tmp != 0);
3796 // goto L_no_such_interface // Not found.
3797 //
3798 Label L_loop_scan_resolved;
3799 bind(L_loop_scan_resolved);
3800 movptr(temp_itbl_klass, Address(scan_temp, 0));
3801 addptr(scan_temp, scan_step);
3802 bind(L_loop_scan_resolved_entry);
3803 cmpptr(holder_klass, temp_itbl_klass);
3804 cmovl(Assembler::equal, temp_reg, Address(scan_temp, ooffset - ioffset - scan_step));
3805 cmpptr(resolved_klass, temp_itbl_klass);
3806 jccb(Assembler::equal, L_resolved_found);
3807 testptr(temp_itbl_klass, temp_itbl_klass);
3808 jccb(Assembler::notZero, L_loop_scan_resolved);
3809
3810 jmpb(L_no_such_interface);
3811
3812 Label L_ready;
3813
3814 // See if we already have a holder klass. If not, go and scan for it.
3815 bind(L_resolved_found);
3816 testptr(temp_reg, temp_reg);
3817 jccb(Assembler::zero, L_scan_holder);
3818 jmpb(L_ready);
3819
3820 bind(L_holder_found);
3821 movl(temp_reg, Address(scan_temp, ooffset - ioffset - scan_step));
3822
3823 // Finally, temp_reg contains holder_klass vtable offset
3824 bind(L_ready);
3825 assert(itableMethodEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
3826 if (temp_reg2 == noreg) { // recv_klass register is clobbered for 32-bit x86 impl
3827 load_klass(scan_temp, receiver, noreg);
3828 movptr(method_result, Address(scan_temp, temp_reg, Address::times_1, itable_index * wordSize + itentry_off));
3829 } else {
3830 movptr(method_result, Address(recv_klass, temp_reg, Address::times_1, itable_index * wordSize + itentry_off));
3831 }
3832 }
3833
3834
3835 // virtual method calling
3836 void MacroAssembler::lookup_virtual_method(Register recv_klass,
3837 RegisterOrConstant vtable_index,
3838 Register method_result) {
3839 const ByteSize base = Klass::vtable_start_offset();
3840 assert(vtableEntry::size() * wordSize == wordSize, "else adjust the scaling in the code below");
3841 Address vtable_entry_addr(recv_klass,
3842 vtable_index, Address::times_ptr,
3843 base + vtableEntry::method_offset());
3844 movptr(method_result, vtable_entry_addr);
3845 }
3846
3847
3848 void MacroAssembler::check_klass_subtype(Register sub_klass,
3849 Register super_klass,
3850 Register temp_reg,
3851 Label& L_success) {
3852 Label L_failure;
3853 check_klass_subtype_fast_path(sub_klass, super_klass, temp_reg, &L_success, &L_failure, nullptr);
3854 check_klass_subtype_slow_path(sub_klass, super_klass, temp_reg, noreg, &L_success, nullptr);
3855 bind(L_failure);
3856 }
3857
3858
3859 void MacroAssembler::check_klass_subtype_fast_path(Register sub_klass,
3860 Register super_klass,
3861 Register temp_reg,
3862 Label* L_success,
3863 Label* L_failure,
3864 Label* L_slow_path,
3865 RegisterOrConstant super_check_offset) {
3866 assert_different_registers(sub_klass, super_klass, temp_reg);
3867 bool must_load_sco = (super_check_offset.constant_or_zero() == -1);
3868 if (super_check_offset.is_register()) {
3869 assert_different_registers(sub_klass, super_klass,
3870 super_check_offset.as_register());
3871 } else if (must_load_sco) {
3872 assert(temp_reg != noreg, "supply either a temp or a register offset");
3873 }
3874
3875 Label L_fallthrough;
3876 int label_nulls = 0;
3877 if (L_success == nullptr) { L_success = &L_fallthrough; label_nulls++; }
3878 if (L_failure == nullptr) { L_failure = &L_fallthrough; label_nulls++; }
3879 if (L_slow_path == nullptr) { L_slow_path = &L_fallthrough; label_nulls++; }
3880 assert(label_nulls <= 1, "at most one null in the batch");
3881
3882 int sc_offset = in_bytes(Klass::secondary_super_cache_offset());
3883 int sco_offset = in_bytes(Klass::super_check_offset_offset());
3884 Address super_check_offset_addr(super_klass, sco_offset);
3885
3886 // Hacked jcc, which "knows" that L_fallthrough, at least, is in
3887 // range of a jccb. If this routine grows larger, reconsider at
3888 // least some of these.
3889 #define local_jcc(assembler_cond, label) \
3890 if (&(label) == &L_fallthrough) jccb(assembler_cond, label); \
3891 else jcc( assembler_cond, label) /*omit semi*/
3892
3893 // Hacked jmp, which may only be used just before L_fallthrough.
3894 #define final_jmp(label) \
3895 if (&(label) == &L_fallthrough) { /*do nothing*/ } \
3896 else jmp(label) /*omit semi*/
3897
3898 // If the pointers are equal, we are done (e.g., String[] elements).
3899 // This self-check enables sharing of secondary supertype arrays among
3900 // non-primary types such as array-of-interface. Otherwise, each such
3901 // type would need its own customized SSA.
3902 // We move this check to the front of the fast path because many
3903 // type checks are in fact trivially successful in this manner,
3904 // so we get a nicely predicted branch right at the start of the check.
3905 cmpptr(sub_klass, super_klass);
3906 local_jcc(Assembler::equal, *L_success);
3907
3908 // Check the supertype display:
3909 if (must_load_sco) {
3910 // Positive movl does right thing on LP64.
3911 movl(temp_reg, super_check_offset_addr);
3912 super_check_offset = RegisterOrConstant(temp_reg);
3913 }
3914 Address super_check_addr(sub_klass, super_check_offset, Address::times_1, 0);
3915 cmpptr(super_klass, super_check_addr); // load displayed supertype
3916
3917 // This check has worked decisively for primary supers.
3918 // Secondary supers are sought in the super_cache ('super_cache_addr').
3919 // (Secondary supers are interfaces and very deeply nested subtypes.)
3920 // This works in the same check above because of a tricky aliasing
3921 // between the super_cache and the primary super display elements.
3922 // (The 'super_check_addr' can address either, as the case requires.)
3923 // Note that the cache is updated below if it does not help us find
3924 // what we need immediately.
3925 // So if it was a primary super, we can just fail immediately.
3926 // Otherwise, it's the slow path for us (no success at this point).
3927
3928 if (super_check_offset.is_register()) {
3929 local_jcc(Assembler::equal, *L_success);
3930 cmpl(super_check_offset.as_register(), sc_offset);
3931 if (L_failure == &L_fallthrough) {
3932 local_jcc(Assembler::equal, *L_slow_path);
3933 } else {
3934 local_jcc(Assembler::notEqual, *L_failure);
3935 final_jmp(*L_slow_path);
3936 }
3937 } else if (super_check_offset.as_constant() == sc_offset) {
3938 // Need a slow path; fast failure is impossible.
3939 if (L_slow_path == &L_fallthrough) {
3940 local_jcc(Assembler::equal, *L_success);
3941 } else {
3942 local_jcc(Assembler::notEqual, *L_slow_path);
3943 final_jmp(*L_success);
3944 }
3945 } else {
3946 // No slow path; it's a fast decision.
3947 if (L_failure == &L_fallthrough) {
3948 local_jcc(Assembler::equal, *L_success);
3949 } else {
3950 local_jcc(Assembler::notEqual, *L_failure);
3951 final_jmp(*L_success);
3952 }
3953 }
3954
3955 bind(L_fallthrough);
3956
3957 #undef local_jcc
3958 #undef final_jmp
3959 }
3960
3961
3962 void MacroAssembler::check_klass_subtype_slow_path_linear(Register sub_klass,
3963 Register super_klass,
3964 Register temp_reg,
3965 Register temp2_reg,
3966 Label* L_success,
3967 Label* L_failure,
3968 bool set_cond_codes) {
3969 assert_different_registers(sub_klass, super_klass, temp_reg);
3970 if (temp2_reg != noreg)
3971 assert_different_registers(sub_klass, super_klass, temp_reg, temp2_reg);
3972 #define IS_A_TEMP(reg) ((reg) == temp_reg || (reg) == temp2_reg)
3973
3974 Label L_fallthrough;
3975 int label_nulls = 0;
3976 if (L_success == nullptr) { L_success = &L_fallthrough; label_nulls++; }
3977 if (L_failure == nullptr) { L_failure = &L_fallthrough; label_nulls++; }
3978 assert(label_nulls <= 1, "at most one null in the batch");
3979
3980 // a couple of useful fields in sub_klass:
3981 int ss_offset = in_bytes(Klass::secondary_supers_offset());
3982 int sc_offset = in_bytes(Klass::secondary_super_cache_offset());
3983 Address secondary_supers_addr(sub_klass, ss_offset);
3984 Address super_cache_addr( sub_klass, sc_offset);
3985
3986 // Do a linear scan of the secondary super-klass chain.
3987 // This code is rarely used, so simplicity is a virtue here.
3988 // The repne_scan instruction uses fixed registers, which we must spill.
3989 // Don't worry too much about pre-existing connections with the input regs.
3990
3991 assert(sub_klass != rax, "killed reg"); // killed by mov(rax, super)
3992 assert(sub_klass != rcx, "killed reg"); // killed by lea(rcx, &pst_counter)
3993
3994 // Get super_klass value into rax (even if it was in rdi or rcx).
3995 bool pushed_rax = false, pushed_rcx = false, pushed_rdi = false;
3996 if (super_klass != rax) {
3997 if (!IS_A_TEMP(rax)) { push(rax); pushed_rax = true; }
3998 mov(rax, super_klass);
3999 }
4000 if (!IS_A_TEMP(rcx)) { push(rcx); pushed_rcx = true; }
4001 if (!IS_A_TEMP(rdi)) { push(rdi); pushed_rdi = true; }
4002
4003 #ifndef PRODUCT
4004 uint* pst_counter = &SharedRuntime::_partial_subtype_ctr;
4005 ExternalAddress pst_counter_addr((address) pst_counter);
4006 lea(rcx, pst_counter_addr);
4007 incrementl(Address(rcx, 0));
4008 #endif //PRODUCT
4009
4010 // We will consult the secondary-super array.
4011 movptr(rdi, secondary_supers_addr);
4012 // Load the array length. (Positive movl does right thing on LP64.)
4013 movl(rcx, Address(rdi, Array<Klass*>::length_offset_in_bytes()));
4014 // Skip to start of data.
4015 addptr(rdi, Array<Klass*>::base_offset_in_bytes());
4016
4017 // Scan RCX words at [RDI] for an occurrence of RAX.
4018 // Set NZ/Z based on last compare.
4019 // Z flag value will not be set by 'repne' if RCX == 0 since 'repne' does
4020 // not change flags (only scas instruction which is repeated sets flags).
4021 // Set Z = 0 (not equal) before 'repne' to indicate that class was not found.
4022
4023 testptr(rax,rax); // Set Z = 0
4024 repne_scan();
4025
4026 // Unspill the temp. registers:
4027 if (pushed_rdi) pop(rdi);
4028 if (pushed_rcx) pop(rcx);
4029 if (pushed_rax) pop(rax);
4030
4031 if (set_cond_codes) {
4032 // Special hack for the AD files: rdi is guaranteed non-zero.
4033 assert(!pushed_rdi, "rdi must be left non-null");
4034 // Also, the condition codes are properly set Z/NZ on succeed/failure.
4035 }
4036
4037 if (L_failure == &L_fallthrough)
4038 jccb(Assembler::notEqual, *L_failure);
4039 else jcc(Assembler::notEqual, *L_failure);
4040
4041 // Success. Cache the super we found and proceed in triumph.
4042 movptr(super_cache_addr, super_klass);
4043
4044 if (L_success != &L_fallthrough) {
4045 jmp(*L_success);
4046 }
4047
4048 #undef IS_A_TEMP
4049
4050 bind(L_fallthrough);
4051 }
4052
4053 void MacroAssembler::check_klass_subtype_slow_path(Register sub_klass,
4054 Register super_klass,
4055 Register temp_reg,
4056 Register temp2_reg,
4057 Label* L_success,
4058 Label* L_failure,
4059 bool set_cond_codes) {
4060 assert(set_cond_codes == false, "must be false on 64-bit x86");
4061 check_klass_subtype_slow_path
4062 (sub_klass, super_klass, temp_reg, temp2_reg, noreg, noreg,
4063 L_success, L_failure);
4064 }
4065
4066 void MacroAssembler::check_klass_subtype_slow_path(Register sub_klass,
4067 Register super_klass,
4068 Register temp_reg,
4069 Register temp2_reg,
4070 Register temp3_reg,
4071 Register temp4_reg,
4072 Label* L_success,
4073 Label* L_failure) {
4074 if (UseSecondarySupersTable) {
4075 check_klass_subtype_slow_path_table
4076 (sub_klass, super_klass, temp_reg, temp2_reg, temp3_reg, temp4_reg,
4077 L_success, L_failure);
4078 } else {
4079 check_klass_subtype_slow_path_linear
4080 (sub_klass, super_klass, temp_reg, temp2_reg, L_success, L_failure, /*set_cond_codes*/false);
4081 }
4082 }
4083
4084 Register MacroAssembler::allocate_if_noreg(Register r,
4085 RegSetIterator<Register> &available_regs,
4086 RegSet ®s_to_push) {
4087 if (!r->is_valid()) {
4088 r = *available_regs++;
4089 regs_to_push += r;
4090 }
4091 return r;
4092 }
4093
4094 void MacroAssembler::check_klass_subtype_slow_path_table(Register sub_klass,
4095 Register super_klass,
4096 Register temp_reg,
4097 Register temp2_reg,
4098 Register temp3_reg,
4099 Register result_reg,
4100 Label* L_success,
4101 Label* L_failure) {
4102 // NB! Callers may assume that, when temp2_reg is a valid register,
4103 // this code sets it to a nonzero value.
4104 bool temp2_reg_was_valid = temp2_reg->is_valid();
4105
4106 RegSet temps = RegSet::of(temp_reg, temp2_reg, temp3_reg);
4107
4108 Label L_fallthrough;
4109 int label_nulls = 0;
4110 if (L_success == nullptr) { L_success = &L_fallthrough; label_nulls++; }
4111 if (L_failure == nullptr) { L_failure = &L_fallthrough; label_nulls++; }
4112 assert(label_nulls <= 1, "at most one null in the batch");
4113
4114 BLOCK_COMMENT("check_klass_subtype_slow_path_table");
4115
4116 RegSetIterator<Register> available_regs
4117 = (RegSet::of(rax, rcx, rdx, r8) + r9 + r10 + r11 + r12 - temps - sub_klass - super_klass).begin();
4118
4119 RegSet pushed_regs;
4120
4121 temp_reg = allocate_if_noreg(temp_reg, available_regs, pushed_regs);
4122 temp2_reg = allocate_if_noreg(temp2_reg, available_regs, pushed_regs);
4123 temp3_reg = allocate_if_noreg(temp3_reg, available_regs, pushed_regs);
4124 result_reg = allocate_if_noreg(result_reg, available_regs, pushed_regs);
4125 Register temp4_reg = allocate_if_noreg(noreg, available_regs, pushed_regs);
4126
4127 assert_different_registers(sub_klass, super_klass, temp_reg, temp2_reg, temp3_reg, result_reg);
4128
4129 {
4130
4131 int register_push_size = pushed_regs.size() * Register::max_slots_per_register * VMRegImpl::stack_slot_size;
4132 int aligned_size = align_up(register_push_size, StackAlignmentInBytes);
4133 subptr(rsp, aligned_size);
4134 push_set(pushed_regs, 0);
4135
4136 lookup_secondary_supers_table_var(sub_klass,
4137 super_klass,
4138 temp_reg, temp2_reg, temp3_reg, temp4_reg, result_reg);
4139 cmpq(result_reg, 0);
4140
4141 // Unspill the temp. registers:
4142 pop_set(pushed_regs, 0);
4143 // Increment SP but do not clobber flags.
4144 lea(rsp, Address(rsp, aligned_size));
4145 }
4146
4147 if (temp2_reg_was_valid) {
4148 movq(temp2_reg, 1);
4149 }
4150
4151 jcc(Assembler::notEqual, *L_failure);
4152
4153 if (L_success != &L_fallthrough) {
4154 jmp(*L_success);
4155 }
4156
4157 bind(L_fallthrough);
4158 }
4159
4160 // population_count variant for running without the POPCNT
4161 // instruction, which was introduced with SSE4.2 in 2008.
4162 void MacroAssembler::population_count(Register dst, Register src,
4163 Register scratch1, Register scratch2) {
4164 assert_different_registers(src, scratch1, scratch2);
4165 if (UsePopCountInstruction) {
4166 Assembler::popcntq(dst, src);
4167 } else {
4168 assert_different_registers(src, scratch1, scratch2);
4169 assert_different_registers(dst, scratch1, scratch2);
4170 Label loop, done;
4171
4172 mov(scratch1, src);
4173 // dst = 0;
4174 // while(scratch1 != 0) {
4175 // dst++;
4176 // scratch1 &= (scratch1 - 1);
4177 // }
4178 xorl(dst, dst);
4179 testq(scratch1, scratch1);
4180 jccb(Assembler::equal, done);
4181 {
4182 bind(loop);
4183 incq(dst);
4184 movq(scratch2, scratch1);
4185 decq(scratch2);
4186 andq(scratch1, scratch2);
4187 jccb(Assembler::notEqual, loop);
4188 }
4189 bind(done);
4190 }
4191 #ifdef ASSERT
4192 mov64(scratch1, 0xCafeBabeDeadBeef);
4193 movq(scratch2, scratch1);
4194 #endif
4195 }
4196
4197 // Ensure that the inline code and the stub are using the same registers.
4198 #define LOOKUP_SECONDARY_SUPERS_TABLE_REGISTERS \
4199 do { \
4200 assert(r_super_klass == rax, "mismatch"); \
4201 assert(r_array_base == rbx, "mismatch"); \
4202 assert(r_array_length == rcx, "mismatch"); \
4203 assert(r_array_index == rdx, "mismatch"); \
4204 assert(r_sub_klass == rsi || r_sub_klass == noreg, "mismatch"); \
4205 assert(r_bitmap == r11 || r_bitmap == noreg, "mismatch"); \
4206 assert(result == rdi || result == noreg, "mismatch"); \
4207 } while(0)
4208
4209 // Versions of salq and rorq that don't need count to be in rcx
4210
4211 void MacroAssembler::salq(Register dest, Register count) {
4212 if (count == rcx) {
4213 Assembler::salq(dest);
4214 } else {
4215 assert_different_registers(rcx, dest);
4216 xchgq(rcx, count);
4217 Assembler::salq(dest);
4218 xchgq(rcx, count);
4219 }
4220 }
4221
4222 void MacroAssembler::rorq(Register dest, Register count) {
4223 if (count == rcx) {
4224 Assembler::rorq(dest);
4225 } else {
4226 assert_different_registers(rcx, dest);
4227 xchgq(rcx, count);
4228 Assembler::rorq(dest);
4229 xchgq(rcx, count);
4230 }
4231 }
4232
4233 // Return true: we succeeded in generating this code
4234 //
4235 // At runtime, return 0 in result if r_super_klass is a superclass of
4236 // r_sub_klass, otherwise return nonzero. Use this if you know the
4237 // super_klass_slot of the class you're looking for. This is always
4238 // the case for instanceof and checkcast.
4239 void MacroAssembler::lookup_secondary_supers_table_const(Register r_sub_klass,
4240 Register r_super_klass,
4241 Register temp1,
4242 Register temp2,
4243 Register temp3,
4244 Register temp4,
4245 Register result,
4246 u1 super_klass_slot) {
4247 assert_different_registers(r_sub_klass, r_super_klass, temp1, temp2, temp3, temp4, result);
4248
4249 Label L_fallthrough, L_success, L_failure;
4250
4251 BLOCK_COMMENT("lookup_secondary_supers_table {");
4252
4253 const Register
4254 r_array_index = temp1,
4255 r_array_length = temp2,
4256 r_array_base = temp3,
4257 r_bitmap = temp4;
4258
4259 LOOKUP_SECONDARY_SUPERS_TABLE_REGISTERS;
4260
4261 xorq(result, result); // = 0
4262
4263 movq(r_bitmap, Address(r_sub_klass, Klass::secondary_supers_bitmap_offset()));
4264 movq(r_array_index, r_bitmap);
4265
4266 // First check the bitmap to see if super_klass might be present. If
4267 // the bit is zero, we are certain that super_klass is not one of
4268 // the secondary supers.
4269 u1 bit = super_klass_slot;
4270 {
4271 // NB: If the count in a x86 shift instruction is 0, the flags are
4272 // not affected, so we do a testq instead.
4273 int shift_count = Klass::SECONDARY_SUPERS_TABLE_MASK - bit;
4274 if (shift_count != 0) {
4275 salq(r_array_index, shift_count);
4276 } else {
4277 testq(r_array_index, r_array_index);
4278 }
4279 }
4280 // We test the MSB of r_array_index, i.e. its sign bit
4281 jcc(Assembler::positive, L_failure);
4282
4283 // Get the first array index that can contain super_klass into r_array_index.
4284 if (bit != 0) {
4285 population_count(r_array_index, r_array_index, temp2, temp3);
4286 } else {
4287 movl(r_array_index, 1);
4288 }
4289 // NB! r_array_index is off by 1. It is compensated by keeping r_array_base off by 1 word.
4290
4291 // We will consult the secondary-super array.
4292 movptr(r_array_base, Address(r_sub_klass, in_bytes(Klass::secondary_supers_offset())));
4293
4294 // We're asserting that the first word in an Array<Klass*> is the
4295 // length, and the second word is the first word of the data. If
4296 // that ever changes, r_array_base will have to be adjusted here.
4297 assert(Array<Klass*>::base_offset_in_bytes() == wordSize, "Adjust this code");
4298 assert(Array<Klass*>::length_offset_in_bytes() == 0, "Adjust this code");
4299
4300 cmpq(r_super_klass, Address(r_array_base, r_array_index, Address::times_8));
4301 jccb(Assembler::equal, L_success);
4302
4303 // Is there another entry to check? Consult the bitmap.
4304 btq(r_bitmap, (bit + 1) & Klass::SECONDARY_SUPERS_TABLE_MASK);
4305 jccb(Assembler::carryClear, L_failure);
4306
4307 // Linear probe. Rotate the bitmap so that the next bit to test is
4308 // in Bit 1.
4309 if (bit != 0) {
4310 rorq(r_bitmap, bit);
4311 }
4312
4313 // Calls into the stub generated by lookup_secondary_supers_table_slow_path.
4314 // Arguments: r_super_klass, r_array_base, r_array_index, r_bitmap.
4315 // Kills: r_array_length.
4316 // Returns: result.
4317 call(RuntimeAddress(StubRoutines::lookup_secondary_supers_table_slow_path_stub()));
4318 // Result (0/1) is in rdi
4319 jmpb(L_fallthrough);
4320
4321 bind(L_failure);
4322 incq(result); // 0 => 1
4323
4324 bind(L_success);
4325 // result = 0;
4326
4327 bind(L_fallthrough);
4328 BLOCK_COMMENT("} lookup_secondary_supers_table");
4329
4330 if (VerifySecondarySupers) {
4331 verify_secondary_supers_table(r_sub_klass, r_super_klass, result,
4332 temp1, temp2, temp3);
4333 }
4334 }
4335
4336 // At runtime, return 0 in result if r_super_klass is a superclass of
4337 // r_sub_klass, otherwise return nonzero. Use this version of
4338 // lookup_secondary_supers_table() if you don't know ahead of time
4339 // which superclass will be searched for. Used by interpreter and
4340 // runtime stubs. It is larger and has somewhat greater latency than
4341 // the version above, which takes a constant super_klass_slot.
4342 void MacroAssembler::lookup_secondary_supers_table_var(Register r_sub_klass,
4343 Register r_super_klass,
4344 Register temp1,
4345 Register temp2,
4346 Register temp3,
4347 Register temp4,
4348 Register result) {
4349 assert_different_registers(r_sub_klass, r_super_klass, temp1, temp2, temp3, temp4, result);
4350 assert_different_registers(r_sub_klass, r_super_klass, rcx);
4351 RegSet temps = RegSet::of(temp1, temp2, temp3, temp4);
4352
4353 Label L_fallthrough, L_success, L_failure;
4354
4355 BLOCK_COMMENT("lookup_secondary_supers_table {");
4356
4357 RegSetIterator<Register> available_regs = (temps - rcx).begin();
4358
4359 // FIXME. Once we are sure that all paths reaching this point really
4360 // do pass rcx as one of our temps we can get rid of the following
4361 // workaround.
4362 assert(temps.contains(rcx), "fix this code");
4363
4364 // We prefer to have our shift count in rcx. If rcx is one of our
4365 // temps, use it for slot. If not, pick any of our temps.
4366 Register slot;
4367 if (!temps.contains(rcx)) {
4368 slot = *available_regs++;
4369 } else {
4370 slot = rcx;
4371 }
4372
4373 const Register r_array_index = *available_regs++;
4374 const Register r_bitmap = *available_regs++;
4375
4376 // The logic above guarantees this property, but we state it here.
4377 assert_different_registers(r_array_index, r_bitmap, rcx);
4378
4379 movq(r_bitmap, Address(r_sub_klass, Klass::secondary_supers_bitmap_offset()));
4380 movq(r_array_index, r_bitmap);
4381
4382 // First check the bitmap to see if super_klass might be present. If
4383 // the bit is zero, we are certain that super_klass is not one of
4384 // the secondary supers.
4385 movb(slot, Address(r_super_klass, Klass::hash_slot_offset()));
4386 xorl(slot, (u1)(Klass::SECONDARY_SUPERS_TABLE_SIZE - 1)); // slot ^ 63 === 63 - slot (mod 64)
4387 salq(r_array_index, slot);
4388
4389 testq(r_array_index, r_array_index);
4390 // We test the MSB of r_array_index, i.e. its sign bit
4391 jcc(Assembler::positive, L_failure);
4392
4393 const Register r_array_base = *available_regs++;
4394
4395 // Get the first array index that can contain super_klass into r_array_index.
4396 // Note: Clobbers r_array_base and slot.
4397 population_count(r_array_index, r_array_index, /*temp2*/r_array_base, /*temp3*/slot);
4398
4399 // NB! r_array_index is off by 1. It is compensated by keeping r_array_base off by 1 word.
4400
4401 // We will consult the secondary-super array.
4402 movptr(r_array_base, Address(r_sub_klass, in_bytes(Klass::secondary_supers_offset())));
4403
4404 // We're asserting that the first word in an Array<Klass*> is the
4405 // length, and the second word is the first word of the data. If
4406 // that ever changes, r_array_base will have to be adjusted here.
4407 assert(Array<Klass*>::base_offset_in_bytes() == wordSize, "Adjust this code");
4408 assert(Array<Klass*>::length_offset_in_bytes() == 0, "Adjust this code");
4409
4410 cmpq(r_super_klass, Address(r_array_base, r_array_index, Address::times_8));
4411 jccb(Assembler::equal, L_success);
4412
4413 // Restore slot to its true value
4414 movb(slot, Address(r_super_klass, Klass::hash_slot_offset()));
4415
4416 // Linear probe. Rotate the bitmap so that the next bit to test is
4417 // in Bit 1.
4418 rorq(r_bitmap, slot);
4419
4420 // Is there another entry to check? Consult the bitmap.
4421 btq(r_bitmap, 1);
4422 jccb(Assembler::carryClear, L_failure);
4423
4424 // Calls into the stub generated by lookup_secondary_supers_table_slow_path.
4425 // Arguments: r_super_klass, r_array_base, r_array_index, r_bitmap.
4426 // Kills: r_array_length.
4427 // Returns: result.
4428 lookup_secondary_supers_table_slow_path(r_super_klass,
4429 r_array_base,
4430 r_array_index,
4431 r_bitmap,
4432 /*temp1*/result,
4433 /*temp2*/slot,
4434 &L_success,
4435 nullptr);
4436
4437 bind(L_failure);
4438 movq(result, 1);
4439 jmpb(L_fallthrough);
4440
4441 bind(L_success);
4442 xorq(result, result); // = 0
4443
4444 bind(L_fallthrough);
4445 BLOCK_COMMENT("} lookup_secondary_supers_table");
4446
4447 if (VerifySecondarySupers) {
4448 verify_secondary_supers_table(r_sub_klass, r_super_klass, result,
4449 temp1, temp2, temp3);
4450 }
4451 }
4452
4453 void MacroAssembler::repne_scanq(Register addr, Register value, Register count, Register limit,
4454 Label* L_success, Label* L_failure) {
4455 Label L_loop, L_fallthrough;
4456 {
4457 int label_nulls = 0;
4458 if (L_success == nullptr) { L_success = &L_fallthrough; label_nulls++; }
4459 if (L_failure == nullptr) { L_failure = &L_fallthrough; label_nulls++; }
4460 assert(label_nulls <= 1, "at most one null in the batch");
4461 }
4462 bind(L_loop);
4463 cmpq(value, Address(addr, count, Address::times_8));
4464 jcc(Assembler::equal, *L_success);
4465 addl(count, 1);
4466 cmpl(count, limit);
4467 jcc(Assembler::less, L_loop);
4468
4469 if (&L_fallthrough != L_failure) {
4470 jmp(*L_failure);
4471 }
4472 bind(L_fallthrough);
4473 }
4474
4475 // Called by code generated by check_klass_subtype_slow_path
4476 // above. This is called when there is a collision in the hashed
4477 // lookup in the secondary supers array.
4478 void MacroAssembler::lookup_secondary_supers_table_slow_path(Register r_super_klass,
4479 Register r_array_base,
4480 Register r_array_index,
4481 Register r_bitmap,
4482 Register temp1,
4483 Register temp2,
4484 Label* L_success,
4485 Label* L_failure) {
4486 assert_different_registers(r_super_klass, r_array_base, r_array_index, r_bitmap, temp1, temp2);
4487
4488 const Register
4489 r_array_length = temp1,
4490 r_sub_klass = noreg,
4491 result = noreg;
4492
4493 Label L_fallthrough;
4494 int label_nulls = 0;
4495 if (L_success == nullptr) { L_success = &L_fallthrough; label_nulls++; }
4496 if (L_failure == nullptr) { L_failure = &L_fallthrough; label_nulls++; }
4497 assert(label_nulls <= 1, "at most one null in the batch");
4498
4499 // Load the array length.
4500 movl(r_array_length, Address(r_array_base, Array<Klass*>::length_offset_in_bytes()));
4501 // And adjust the array base to point to the data.
4502 // NB! Effectively increments current slot index by 1.
4503 assert(Array<Klass*>::base_offset_in_bytes() == wordSize, "");
4504 addptr(r_array_base, Array<Klass*>::base_offset_in_bytes());
4505
4506 // Linear probe
4507 Label L_huge;
4508
4509 // The bitmap is full to bursting.
4510 // Implicit invariant: BITMAP_FULL implies (length > 0)
4511 cmpl(r_array_length, (int32_t)Klass::SECONDARY_SUPERS_TABLE_SIZE - 2);
4512 jcc(Assembler::greater, L_huge);
4513
4514 // NB! Our caller has checked bits 0 and 1 in the bitmap. The
4515 // current slot (at secondary_supers[r_array_index]) has not yet
4516 // been inspected, and r_array_index may be out of bounds if we
4517 // wrapped around the end of the array.
4518
4519 { // This is conventional linear probing, but instead of terminating
4520 // when a null entry is found in the table, we maintain a bitmap
4521 // in which a 0 indicates missing entries.
4522 // The check above guarantees there are 0s in the bitmap, so the loop
4523 // eventually terminates.
4524
4525 xorl(temp2, temp2); // = 0;
4526
4527 Label L_again;
4528 bind(L_again);
4529
4530 // Check for array wraparound.
4531 cmpl(r_array_index, r_array_length);
4532 cmovl(Assembler::greaterEqual, r_array_index, temp2);
4533
4534 cmpq(r_super_klass, Address(r_array_base, r_array_index, Address::times_8));
4535 jcc(Assembler::equal, *L_success);
4536
4537 // If the next bit in bitmap is zero, we're done.
4538 btq(r_bitmap, 2); // look-ahead check (Bit 2); Bits 0 and 1 are tested by now
4539 jcc(Assembler::carryClear, *L_failure);
4540
4541 rorq(r_bitmap, 1); // Bits 1/2 => 0/1
4542 addl(r_array_index, 1);
4543
4544 jmp(L_again);
4545 }
4546
4547 { // Degenerate case: more than 64 secondary supers.
4548 // FIXME: We could do something smarter here, maybe a vectorized
4549 // comparison or a binary search, but is that worth any added
4550 // complexity?
4551 bind(L_huge);
4552 xorl(r_array_index, r_array_index); // = 0
4553 repne_scanq(r_array_base, r_super_klass, r_array_index, r_array_length,
4554 L_success,
4555 (&L_fallthrough != L_failure ? L_failure : nullptr));
4556
4557 bind(L_fallthrough);
4558 }
4559 }
4560
4561 struct VerifyHelperArguments {
4562 Klass* _super;
4563 Klass* _sub;
4564 intptr_t _linear_result;
4565 intptr_t _table_result;
4566 };
4567
4568 static void verify_secondary_supers_table_helper(const char* msg, VerifyHelperArguments* args) {
4569 Klass::on_secondary_supers_verification_failure(args->_super,
4570 args->_sub,
4571 args->_linear_result,
4572 args->_table_result,
4573 msg);
4574 }
4575
4576 // Make sure that the hashed lookup and a linear scan agree.
4577 void MacroAssembler::verify_secondary_supers_table(Register r_sub_klass,
4578 Register r_super_klass,
4579 Register result,
4580 Register temp1,
4581 Register temp2,
4582 Register temp3) {
4583 const Register
4584 r_array_index = temp1,
4585 r_array_length = temp2,
4586 r_array_base = temp3,
4587 r_bitmap = noreg;
4588
4589 BLOCK_COMMENT("verify_secondary_supers_table {");
4590
4591 Label L_success, L_failure, L_check, L_done;
4592
4593 movptr(r_array_base, Address(r_sub_klass, in_bytes(Klass::secondary_supers_offset())));
4594 movl(r_array_length, Address(r_array_base, Array<Klass*>::length_offset_in_bytes()));
4595 // And adjust the array base to point to the data.
4596 addptr(r_array_base, Array<Klass*>::base_offset_in_bytes());
4597
4598 testl(r_array_length, r_array_length); // array_length == 0?
4599 jcc(Assembler::zero, L_failure);
4600
4601 movl(r_array_index, 0);
4602 repne_scanq(r_array_base, r_super_klass, r_array_index, r_array_length, &L_success);
4603 // fall through to L_failure
4604
4605 const Register linear_result = r_array_index; // reuse temp1
4606
4607 bind(L_failure); // not present
4608 movl(linear_result, 1);
4609 jmp(L_check);
4610
4611 bind(L_success); // present
4612 movl(linear_result, 0);
4613
4614 bind(L_check);
4615 cmpl(linear_result, result);
4616 jcc(Assembler::equal, L_done);
4617
4618 { // To avoid calling convention issues, build a record on the stack
4619 // and pass the pointer to that instead.
4620 push(result);
4621 push(linear_result);
4622 push(r_sub_klass);
4623 push(r_super_klass);
4624 movptr(c_rarg1, rsp);
4625 movptr(c_rarg0, (uintptr_t) "mismatch");
4626 call(RuntimeAddress(CAST_FROM_FN_PTR(address, verify_secondary_supers_table_helper)));
4627 should_not_reach_here();
4628 }
4629 bind(L_done);
4630
4631 BLOCK_COMMENT("} verify_secondary_supers_table");
4632 }
4633
4634 #undef LOOKUP_SECONDARY_SUPERS_TABLE_REGISTERS
4635
4636 void MacroAssembler::clinit_barrier(Register klass, Label* L_fast_path, Label* L_slow_path) {
4637 assert(L_fast_path != nullptr || L_slow_path != nullptr, "at least one is required");
4638
4639 Label L_fallthrough;
4640 if (L_fast_path == nullptr) {
4641 L_fast_path = &L_fallthrough;
4642 } else if (L_slow_path == nullptr) {
4643 L_slow_path = &L_fallthrough;
4644 }
4645
4646 // Fast path check: class is fully initialized.
4647 // init_state needs acquire, but x86 is TSO, and so we are already good.
4648 cmpb(Address(klass, InstanceKlass::init_state_offset()), InstanceKlass::fully_initialized);
4649 jcc(Assembler::equal, *L_fast_path);
4650
4651 // Fast path check: current thread is initializer thread
4652 cmpptr(r15_thread, Address(klass, InstanceKlass::init_thread_offset()));
4653 if (L_slow_path == &L_fallthrough) {
4654 jcc(Assembler::equal, *L_fast_path);
4655 bind(*L_slow_path);
4656 } else if (L_fast_path == &L_fallthrough) {
4657 jcc(Assembler::notEqual, *L_slow_path);
4658 bind(*L_fast_path);
4659 } else {
4660 Unimplemented();
4661 }
4662 }
4663
4664 void MacroAssembler::cmov32(Condition cc, Register dst, Address src) {
4665 if (VM_Version::supports_cmov()) {
4666 cmovl(cc, dst, src);
4667 } else {
4668 Label L;
4669 jccb(negate_condition(cc), L);
4670 movl(dst, src);
4671 bind(L);
4672 }
4673 }
4674
4675 void MacroAssembler::cmov32(Condition cc, Register dst, Register src) {
4676 if (VM_Version::supports_cmov()) {
4677 cmovl(cc, dst, src);
4678 } else {
4679 Label L;
4680 jccb(negate_condition(cc), L);
4681 movl(dst, src);
4682 bind(L);
4683 }
4684 }
4685
4686 void MacroAssembler::_verify_oop(Register reg, const char* s, const char* file, int line) {
4687 if (!VerifyOops) return;
4688
4689 BLOCK_COMMENT("verify_oop {");
4690 push(rscratch1);
4691 push(rax); // save rax
4692 push(reg); // pass register argument
4693
4694 // Pass register number to verify_oop_subroutine
4695 const char* b = nullptr;
4696 {
4697 ResourceMark rm;
4698 stringStream ss;
4699 ss.print("verify_oop: %s: %s (%s:%d)", reg->name(), s, file, line);
4700 b = code_string(ss.as_string());
4701 }
4702 AddressLiteral buffer((address) b, external_word_Relocation::spec_for_immediate());
4703 pushptr(buffer.addr(), rscratch1);
4704
4705 // call indirectly to solve generation ordering problem
4706 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address()));
4707 call(rax);
4708 // Caller pops the arguments (oop, message) and restores rax, r10
4709 BLOCK_COMMENT("} verify_oop");
4710 }
4711
4712 void MacroAssembler::vallones(XMMRegister dst, int vector_len) {
4713 if (UseAVX > 2 && (vector_len == Assembler::AVX_512bit || VM_Version::supports_avx512vl())) {
4714 // Only pcmpeq has dependency breaking treatment (i.e the execution can begin without
4715 // waiting for the previous result on dst), not vpcmpeqd, so just use vpternlog
4716 vpternlogd(dst, 0xFF, dst, dst, vector_len);
4717 } else if (VM_Version::supports_avx()) {
4718 vpcmpeqd(dst, dst, dst, vector_len);
4719 } else {
4720 pcmpeqd(dst, dst);
4721 }
4722 }
4723
4724 Address MacroAssembler::argument_address(RegisterOrConstant arg_slot,
4725 int extra_slot_offset) {
4726 // cf. TemplateTable::prepare_invoke(), if (load_receiver).
4727 int stackElementSize = Interpreter::stackElementSize;
4728 int offset = Interpreter::expr_offset_in_bytes(extra_slot_offset+0);
4729 #ifdef ASSERT
4730 int offset1 = Interpreter::expr_offset_in_bytes(extra_slot_offset+1);
4731 assert(offset1 - offset == stackElementSize, "correct arithmetic");
4732 #endif
4733 Register scale_reg = noreg;
4734 Address::ScaleFactor scale_factor = Address::no_scale;
4735 if (arg_slot.is_constant()) {
4736 offset += arg_slot.as_constant() * stackElementSize;
4737 } else {
4738 scale_reg = arg_slot.as_register();
4739 scale_factor = Address::times(stackElementSize);
4740 }
4741 offset += wordSize; // return PC is on stack
4742 return Address(rsp, scale_reg, scale_factor, offset);
4743 }
4744
4745 void MacroAssembler::_verify_oop_addr(Address addr, const char* s, const char* file, int line) {
4746 if (!VerifyOops) return;
4747
4748 push(rscratch1);
4749 push(rax); // save rax,
4750 // addr may contain rsp so we will have to adjust it based on the push
4751 // we just did (and on 64 bit we do two pushes)
4752 // NOTE: 64bit seemed to have had a bug in that it did movq(addr, rax); which
4753 // stores rax into addr which is backwards of what was intended.
4754 if (addr.uses(rsp)) {
4755 lea(rax, addr);
4756 pushptr(Address(rax, 2 * BytesPerWord));
4757 } else {
4758 pushptr(addr);
4759 }
4760
4761 // Pass register number to verify_oop_subroutine
4762 const char* b = nullptr;
4763 {
4764 ResourceMark rm;
4765 stringStream ss;
4766 ss.print("verify_oop_addr: %s (%s:%d)", s, file, line);
4767 b = code_string(ss.as_string());
4768 }
4769 AddressLiteral buffer((address) b, external_word_Relocation::spec_for_immediate());
4770 pushptr(buffer.addr(), rscratch1);
4771
4772 // call indirectly to solve generation ordering problem
4773 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address()));
4774 call(rax);
4775 // Caller pops the arguments (addr, message) and restores rax, r10.
4776 }
4777
4778 void MacroAssembler::verify_tlab() {
4779 #ifdef ASSERT
4780 if (UseTLAB && VerifyOops) {
4781 Label next, ok;
4782 Register t1 = rsi;
4783
4784 push(t1);
4785
4786 movptr(t1, Address(r15_thread, in_bytes(JavaThread::tlab_top_offset())));
4787 cmpptr(t1, Address(r15_thread, in_bytes(JavaThread::tlab_start_offset())));
4788 jcc(Assembler::aboveEqual, next);
4789 STOP("assert(top >= start)");
4790 should_not_reach_here();
4791
4792 bind(next);
4793 movptr(t1, Address(r15_thread, in_bytes(JavaThread::tlab_end_offset())));
4794 cmpptr(t1, Address(r15_thread, in_bytes(JavaThread::tlab_top_offset())));
4795 jcc(Assembler::aboveEqual, ok);
4796 STOP("assert(top <= end)");
4797 should_not_reach_here();
4798
4799 bind(ok);
4800 pop(t1);
4801 }
4802 #endif
4803 }
4804
4805 class ControlWord {
4806 public:
4807 int32_t _value;
4808
4809 int rounding_control() const { return (_value >> 10) & 3 ; }
4810 int precision_control() const { return (_value >> 8) & 3 ; }
4811 bool precision() const { return ((_value >> 5) & 1) != 0; }
4812 bool underflow() const { return ((_value >> 4) & 1) != 0; }
4813 bool overflow() const { return ((_value >> 3) & 1) != 0; }
4814 bool zero_divide() const { return ((_value >> 2) & 1) != 0; }
4815 bool denormalized() const { return ((_value >> 1) & 1) != 0; }
4816 bool invalid() const { return ((_value >> 0) & 1) != 0; }
4817
4818 void print() const {
4819 // rounding control
4820 const char* rc;
4821 switch (rounding_control()) {
4822 case 0: rc = "round near"; break;
4823 case 1: rc = "round down"; break;
4824 case 2: rc = "round up "; break;
4825 case 3: rc = "chop "; break;
4826 default:
4827 rc = nullptr; // silence compiler warnings
4828 fatal("Unknown rounding control: %d", rounding_control());
4829 };
4830 // precision control
4831 const char* pc;
4832 switch (precision_control()) {
4833 case 0: pc = "24 bits "; break;
4834 case 1: pc = "reserved"; break;
4835 case 2: pc = "53 bits "; break;
4836 case 3: pc = "64 bits "; break;
4837 default:
4838 pc = nullptr; // silence compiler warnings
4839 fatal("Unknown precision control: %d", precision_control());
4840 };
4841 // flags
4842 char f[9];
4843 f[0] = ' ';
4844 f[1] = ' ';
4845 f[2] = (precision ()) ? 'P' : 'p';
4846 f[3] = (underflow ()) ? 'U' : 'u';
4847 f[4] = (overflow ()) ? 'O' : 'o';
4848 f[5] = (zero_divide ()) ? 'Z' : 'z';
4849 f[6] = (denormalized()) ? 'D' : 'd';
4850 f[7] = (invalid ()) ? 'I' : 'i';
4851 f[8] = '\x0';
4852 // output
4853 printf("%04x masks = %s, %s, %s", _value & 0xFFFF, f, rc, pc);
4854 }
4855
4856 };
4857
4858 class StatusWord {
4859 public:
4860 int32_t _value;
4861
4862 bool busy() const { return ((_value >> 15) & 1) != 0; }
4863 bool C3() const { return ((_value >> 14) & 1) != 0; }
4864 bool C2() const { return ((_value >> 10) & 1) != 0; }
4865 bool C1() const { return ((_value >> 9) & 1) != 0; }
4866 bool C0() const { return ((_value >> 8) & 1) != 0; }
4867 int top() const { return (_value >> 11) & 7 ; }
4868 bool error_status() const { return ((_value >> 7) & 1) != 0; }
4869 bool stack_fault() const { return ((_value >> 6) & 1) != 0; }
4870 bool precision() const { return ((_value >> 5) & 1) != 0; }
4871 bool underflow() const { return ((_value >> 4) & 1) != 0; }
4872 bool overflow() const { return ((_value >> 3) & 1) != 0; }
4873 bool zero_divide() const { return ((_value >> 2) & 1) != 0; }
4874 bool denormalized() const { return ((_value >> 1) & 1) != 0; }
4875 bool invalid() const { return ((_value >> 0) & 1) != 0; }
4876
4877 void print() const {
4878 // condition codes
4879 char c[5];
4880 c[0] = (C3()) ? '3' : '-';
4881 c[1] = (C2()) ? '2' : '-';
4882 c[2] = (C1()) ? '1' : '-';
4883 c[3] = (C0()) ? '0' : '-';
4884 c[4] = '\x0';
4885 // flags
4886 char f[9];
4887 f[0] = (error_status()) ? 'E' : '-';
4888 f[1] = (stack_fault ()) ? 'S' : '-';
4889 f[2] = (precision ()) ? 'P' : '-';
4890 f[3] = (underflow ()) ? 'U' : '-';
4891 f[4] = (overflow ()) ? 'O' : '-';
4892 f[5] = (zero_divide ()) ? 'Z' : '-';
4893 f[6] = (denormalized()) ? 'D' : '-';
4894 f[7] = (invalid ()) ? 'I' : '-';
4895 f[8] = '\x0';
4896 // output
4897 printf("%04x flags = %s, cc = %s, top = %d", _value & 0xFFFF, f, c, top());
4898 }
4899
4900 };
4901
4902 class TagWord {
4903 public:
4904 int32_t _value;
4905
4906 int tag_at(int i) const { return (_value >> (i*2)) & 3; }
4907
4908 void print() const {
4909 printf("%04x", _value & 0xFFFF);
4910 }
4911
4912 };
4913
4914 class FPU_Register {
4915 public:
4916 int32_t _m0;
4917 int32_t _m1;
4918 int16_t _ex;
4919
4920 bool is_indefinite() const {
4921 return _ex == -1 && _m1 == (int32_t)0xC0000000 && _m0 == 0;
4922 }
4923
4924 void print() const {
4925 char sign = (_ex < 0) ? '-' : '+';
4926 const char* kind = (_ex == 0x7FFF || _ex == (int16_t)-1) ? "NaN" : " ";
4927 printf("%c%04hx.%08x%08x %s", sign, _ex, _m1, _m0, kind);
4928 };
4929
4930 };
4931
4932 class FPU_State {
4933 public:
4934 enum {
4935 register_size = 10,
4936 number_of_registers = 8,
4937 register_mask = 7
4938 };
4939
4940 ControlWord _control_word;
4941 StatusWord _status_word;
4942 TagWord _tag_word;
4943 int32_t _error_offset;
4944 int32_t _error_selector;
4945 int32_t _data_offset;
4946 int32_t _data_selector;
4947 int8_t _register[register_size * number_of_registers];
4948
4949 int tag_for_st(int i) const { return _tag_word.tag_at((_status_word.top() + i) & register_mask); }
4950 FPU_Register* st(int i) const { return (FPU_Register*)&_register[register_size * i]; }
4951
4952 const char* tag_as_string(int tag) const {
4953 switch (tag) {
4954 case 0: return "valid";
4955 case 1: return "zero";
4956 case 2: return "special";
4957 case 3: return "empty";
4958 }
4959 ShouldNotReachHere();
4960 return nullptr;
4961 }
4962
4963 void print() const {
4964 // print computation registers
4965 { int t = _status_word.top();
4966 for (int i = 0; i < number_of_registers; i++) {
4967 int j = (i - t) & register_mask;
4968 printf("%c r%d = ST%d = ", (j == 0 ? '*' : ' '), i, j);
4969 st(j)->print();
4970 printf(" %s\n", tag_as_string(_tag_word.tag_at(i)));
4971 }
4972 }
4973 printf("\n");
4974 // print control registers
4975 printf("ctrl = "); _control_word.print(); printf("\n");
4976 printf("stat = "); _status_word .print(); printf("\n");
4977 printf("tags = "); _tag_word .print(); printf("\n");
4978 }
4979
4980 };
4981
4982 class Flag_Register {
4983 public:
4984 int32_t _value;
4985
4986 bool overflow() const { return ((_value >> 11) & 1) != 0; }
4987 bool direction() const { return ((_value >> 10) & 1) != 0; }
4988 bool sign() const { return ((_value >> 7) & 1) != 0; }
4989 bool zero() const { return ((_value >> 6) & 1) != 0; }
4990 bool auxiliary_carry() const { return ((_value >> 4) & 1) != 0; }
4991 bool parity() const { return ((_value >> 2) & 1) != 0; }
4992 bool carry() const { return ((_value >> 0) & 1) != 0; }
4993
4994 void print() const {
4995 // flags
4996 char f[8];
4997 f[0] = (overflow ()) ? 'O' : '-';
4998 f[1] = (direction ()) ? 'D' : '-';
4999 f[2] = (sign ()) ? 'S' : '-';
5000 f[3] = (zero ()) ? 'Z' : '-';
5001 f[4] = (auxiliary_carry()) ? 'A' : '-';
5002 f[5] = (parity ()) ? 'P' : '-';
5003 f[6] = (carry ()) ? 'C' : '-';
5004 f[7] = '\x0';
5005 // output
5006 printf("%08x flags = %s", _value, f);
5007 }
5008
5009 };
5010
5011 class IU_Register {
5012 public:
5013 int32_t _value;
5014
5015 void print() const {
5016 printf("%08x %11d", _value, _value);
5017 }
5018
5019 };
5020
5021 class IU_State {
5022 public:
5023 Flag_Register _eflags;
5024 IU_Register _rdi;
5025 IU_Register _rsi;
5026 IU_Register _rbp;
5027 IU_Register _rsp;
5028 IU_Register _rbx;
5029 IU_Register _rdx;
5030 IU_Register _rcx;
5031 IU_Register _rax;
5032
5033 void print() const {
5034 // computation registers
5035 printf("rax, = "); _rax.print(); printf("\n");
5036 printf("rbx, = "); _rbx.print(); printf("\n");
5037 printf("rcx = "); _rcx.print(); printf("\n");
5038 printf("rdx = "); _rdx.print(); printf("\n");
5039 printf("rdi = "); _rdi.print(); printf("\n");
5040 printf("rsi = "); _rsi.print(); printf("\n");
5041 printf("rbp, = "); _rbp.print(); printf("\n");
5042 printf("rsp = "); _rsp.print(); printf("\n");
5043 printf("\n");
5044 // control registers
5045 printf("flgs = "); _eflags.print(); printf("\n");
5046 }
5047 };
5048
5049
5050 class CPU_State {
5051 public:
5052 FPU_State _fpu_state;
5053 IU_State _iu_state;
5054
5055 void print() const {
5056 printf("--------------------------------------------------\n");
5057 _iu_state .print();
5058 printf("\n");
5059 _fpu_state.print();
5060 printf("--------------------------------------------------\n");
5061 }
5062
5063 };
5064
5065
5066 static void _print_CPU_state(CPU_State* state) {
5067 state->print();
5068 };
5069
5070
5071 void MacroAssembler::print_CPU_state() {
5072 push_CPU_state();
5073 push(rsp); // pass CPU state
5074 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _print_CPU_state)));
5075 addptr(rsp, wordSize); // discard argument
5076 pop_CPU_state();
5077 }
5078
5079 void MacroAssembler::restore_cpu_control_state_after_jni(Register rscratch) {
5080 // Either restore the MXCSR register after returning from the JNI Call
5081 // or verify that it wasn't changed (with -Xcheck:jni flag).
5082 if (VM_Version::supports_sse()) {
5083 if (RestoreMXCSROnJNICalls) {
5084 ldmxcsr(ExternalAddress(StubRoutines::x86::addr_mxcsr_std()), rscratch);
5085 } else if (CheckJNICalls) {
5086 call(RuntimeAddress(StubRoutines::x86::verify_mxcsr_entry()));
5087 }
5088 }
5089 // Clear upper bits of YMM registers to avoid SSE <-> AVX transition penalty.
5090 vzeroupper();
5091 }
5092
5093 // ((OopHandle)result).resolve();
5094 void MacroAssembler::resolve_oop_handle(Register result, Register tmp) {
5095 assert_different_registers(result, tmp);
5096
5097 // Only 64 bit platforms support GCs that require a tmp register
5098 // Only IN_HEAP loads require a thread_tmp register
5099 // OopHandle::resolve is an indirection like jobject.
5100 access_load_at(T_OBJECT, IN_NATIVE,
5101 result, Address(result, 0), tmp);
5102 }
5103
5104 // ((WeakHandle)result).resolve();
5105 void MacroAssembler::resolve_weak_handle(Register rresult, Register rtmp) {
5106 assert_different_registers(rresult, rtmp);
5107 Label resolved;
5108
5109 // A null weak handle resolves to null.
5110 cmpptr(rresult, 0);
5111 jcc(Assembler::equal, resolved);
5112
5113 // Only 64 bit platforms support GCs that require a tmp register
5114 // Only IN_HEAP loads require a thread_tmp register
5115 // WeakHandle::resolve is an indirection like jweak.
5116 access_load_at(T_OBJECT, IN_NATIVE | ON_PHANTOM_OOP_REF,
5117 rresult, Address(rresult, 0), rtmp);
5118 bind(resolved);
5119 }
5120
5121 void MacroAssembler::load_mirror(Register mirror, Register method, Register tmp) {
5122 // get mirror
5123 const int mirror_offset = in_bytes(Klass::java_mirror_offset());
5124 load_method_holder(mirror, method);
5125 movptr(mirror, Address(mirror, mirror_offset));
5126 resolve_oop_handle(mirror, tmp);
5127 }
5128
5129 void MacroAssembler::load_method_holder_cld(Register rresult, Register rmethod) {
5130 load_method_holder(rresult, rmethod);
5131 movptr(rresult, Address(rresult, InstanceKlass::class_loader_data_offset()));
5132 }
5133
5134 void MacroAssembler::load_method_holder(Register holder, Register method) {
5135 movptr(holder, Address(method, Method::const_offset())); // ConstMethod*
5136 movptr(holder, Address(holder, ConstMethod::constants_offset())); // ConstantPool*
5137 movptr(holder, Address(holder, ConstantPool::pool_holder_offset())); // InstanceKlass*
5138 }
5139
5140 void MacroAssembler::load_narrow_klass_compact(Register dst, Register src) {
5141 assert(UseCompactObjectHeaders, "expect compact object headers");
5142 movq(dst, Address(src, oopDesc::mark_offset_in_bytes()));
5143 shrq(dst, markWord::klass_shift);
5144 }
5145
5146 void MacroAssembler::load_klass(Register dst, Register src, Register tmp) {
5147 assert_different_registers(src, tmp);
5148 assert_different_registers(dst, tmp);
5149
5150 if (UseCompactObjectHeaders) {
5151 load_narrow_klass_compact(dst, src);
5152 decode_klass_not_null(dst, tmp);
5153 } else if (UseCompressedClassPointers) {
5154 movl(dst, Address(src, oopDesc::klass_offset_in_bytes()));
5155 decode_klass_not_null(dst, tmp);
5156 } else {
5157 movptr(dst, Address(src, oopDesc::klass_offset_in_bytes()));
5158 }
5159 }
5160
5161 void MacroAssembler::store_klass(Register dst, Register src, Register tmp) {
5162 assert(!UseCompactObjectHeaders, "not with compact headers");
5163 assert_different_registers(src, tmp);
5164 assert_different_registers(dst, tmp);
5165 if (UseCompressedClassPointers) {
5166 encode_klass_not_null(src, tmp);
5167 movl(Address(dst, oopDesc::klass_offset_in_bytes()), src);
5168 } else {
5169 movptr(Address(dst, oopDesc::klass_offset_in_bytes()), src);
5170 }
5171 }
5172
5173 void MacroAssembler::cmp_klass(Register klass, Register obj, Register tmp) {
5174 if (UseCompactObjectHeaders) {
5175 assert(tmp != noreg, "need tmp");
5176 assert_different_registers(klass, obj, tmp);
5177 load_narrow_klass_compact(tmp, obj);
5178 cmpl(klass, tmp);
5179 } else if (UseCompressedClassPointers) {
5180 cmpl(klass, Address(obj, oopDesc::klass_offset_in_bytes()));
5181 } else {
5182 cmpptr(klass, Address(obj, oopDesc::klass_offset_in_bytes()));
5183 }
5184 }
5185
5186 void MacroAssembler::cmp_klasses_from_objects(Register obj1, Register obj2, Register tmp1, Register tmp2) {
5187 if (UseCompactObjectHeaders) {
5188 assert(tmp2 != noreg, "need tmp2");
5189 assert_different_registers(obj1, obj2, tmp1, tmp2);
5190 load_narrow_klass_compact(tmp1, obj1);
5191 load_narrow_klass_compact(tmp2, obj2);
5192 cmpl(tmp1, tmp2);
5193 } else if (UseCompressedClassPointers) {
5194 movl(tmp1, Address(obj1, oopDesc::klass_offset_in_bytes()));
5195 cmpl(tmp1, Address(obj2, oopDesc::klass_offset_in_bytes()));
5196 } else {
5197 movptr(tmp1, Address(obj1, oopDesc::klass_offset_in_bytes()));
5198 cmpptr(tmp1, Address(obj2, oopDesc::klass_offset_in_bytes()));
5199 }
5200 }
5201
5202 void MacroAssembler::access_load_at(BasicType type, DecoratorSet decorators, Register dst, Address src,
5203 Register tmp1) {
5204 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
5205 decorators = AccessInternal::decorator_fixup(decorators, type);
5206 bool as_raw = (decorators & AS_RAW) != 0;
5207 if (as_raw) {
5208 bs->BarrierSetAssembler::load_at(this, decorators, type, dst, src, tmp1);
5209 } else {
5210 bs->load_at(this, decorators, type, dst, src, tmp1);
5211 }
5212 }
5213
5214 void MacroAssembler::access_store_at(BasicType type, DecoratorSet decorators, Address dst, Register val,
5215 Register tmp1, Register tmp2, Register tmp3) {
5216 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
5217 decorators = AccessInternal::decorator_fixup(decorators, type);
5218 bool as_raw = (decorators & AS_RAW) != 0;
5219 if (as_raw) {
5220 bs->BarrierSetAssembler::store_at(this, decorators, type, dst, val, tmp1, tmp2, tmp3);
5221 } else {
5222 bs->store_at(this, decorators, type, dst, val, tmp1, tmp2, tmp3);
5223 }
5224 }
5225
5226 void MacroAssembler::load_heap_oop(Register dst, Address src, Register tmp1, DecoratorSet decorators) {
5227 access_load_at(T_OBJECT, IN_HEAP | decorators, dst, src, tmp1);
5228 }
5229
5230 // Doesn't do verification, generates fixed size code
5231 void MacroAssembler::load_heap_oop_not_null(Register dst, Address src, Register tmp1, DecoratorSet decorators) {
5232 access_load_at(T_OBJECT, IN_HEAP | IS_NOT_NULL | decorators, dst, src, tmp1);
5233 }
5234
5235 void MacroAssembler::store_heap_oop(Address dst, Register val, Register tmp1,
5236 Register tmp2, Register tmp3, DecoratorSet decorators) {
5237 access_store_at(T_OBJECT, IN_HEAP | decorators, dst, val, tmp1, tmp2, tmp3);
5238 }
5239
5240 // Used for storing nulls.
5241 void MacroAssembler::store_heap_oop_null(Address dst) {
5242 access_store_at(T_OBJECT, IN_HEAP, dst, noreg, noreg, noreg, noreg);
5243 }
5244
5245 void MacroAssembler::store_klass_gap(Register dst, Register src) {
5246 assert(!UseCompactObjectHeaders, "Don't use with compact headers");
5247 if (UseCompressedClassPointers) {
5248 // Store to klass gap in destination
5249 movl(Address(dst, oopDesc::klass_gap_offset_in_bytes()), src);
5250 }
5251 }
5252
5253 #ifdef ASSERT
5254 void MacroAssembler::verify_heapbase(const char* msg) {
5255 assert (UseCompressedOops, "should be compressed");
5256 assert (Universe::heap() != nullptr, "java heap should be initialized");
5257 if (CheckCompressedOops) {
5258 Label ok;
5259 ExternalAddress src2(CompressedOops::base_addr());
5260 const bool is_src2_reachable = reachable(src2);
5261 if (!is_src2_reachable) {
5262 push(rscratch1); // cmpptr trashes rscratch1
5263 }
5264 cmpptr(r12_heapbase, src2, rscratch1);
5265 jcc(Assembler::equal, ok);
5266 STOP(msg);
5267 bind(ok);
5268 if (!is_src2_reachable) {
5269 pop(rscratch1);
5270 }
5271 }
5272 }
5273 #endif
5274
5275 // Algorithm must match oop.inline.hpp encode_heap_oop.
5276 void MacroAssembler::encode_heap_oop(Register r) {
5277 #ifdef ASSERT
5278 verify_heapbase("MacroAssembler::encode_heap_oop: heap base corrupted?");
5279 #endif
5280 verify_oop_msg(r, "broken oop in encode_heap_oop");
5281 if (CompressedOops::base() == nullptr) {
5282 if (CompressedOops::shift() != 0) {
5283 assert (LogMinObjAlignmentInBytes == CompressedOops::shift(), "decode alg wrong");
5284 shrq(r, LogMinObjAlignmentInBytes);
5285 }
5286 return;
5287 }
5288 testq(r, r);
5289 cmovq(Assembler::equal, r, r12_heapbase);
5290 subq(r, r12_heapbase);
5291 shrq(r, LogMinObjAlignmentInBytes);
5292 }
5293
5294 void MacroAssembler::encode_heap_oop_not_null(Register r) {
5295 #ifdef ASSERT
5296 verify_heapbase("MacroAssembler::encode_heap_oop_not_null: heap base corrupted?");
5297 if (CheckCompressedOops) {
5298 Label ok;
5299 testq(r, r);
5300 jcc(Assembler::notEqual, ok);
5301 STOP("null oop passed to encode_heap_oop_not_null");
5302 bind(ok);
5303 }
5304 #endif
5305 verify_oop_msg(r, "broken oop in encode_heap_oop_not_null");
5306 if (CompressedOops::base() != nullptr) {
5307 subq(r, r12_heapbase);
5308 }
5309 if (CompressedOops::shift() != 0) {
5310 assert (LogMinObjAlignmentInBytes == CompressedOops::shift(), "decode alg wrong");
5311 shrq(r, LogMinObjAlignmentInBytes);
5312 }
5313 }
5314
5315 void MacroAssembler::encode_heap_oop_not_null(Register dst, Register src) {
5316 #ifdef ASSERT
5317 verify_heapbase("MacroAssembler::encode_heap_oop_not_null2: heap base corrupted?");
5318 if (CheckCompressedOops) {
5319 Label ok;
5320 testq(src, src);
5321 jcc(Assembler::notEqual, ok);
5322 STOP("null oop passed to encode_heap_oop_not_null2");
5323 bind(ok);
5324 }
5325 #endif
5326 verify_oop_msg(src, "broken oop in encode_heap_oop_not_null2");
5327 if (dst != src) {
5328 movq(dst, src);
5329 }
5330 if (CompressedOops::base() != nullptr) {
5331 subq(dst, r12_heapbase);
5332 }
5333 if (CompressedOops::shift() != 0) {
5334 assert (LogMinObjAlignmentInBytes == CompressedOops::shift(), "decode alg wrong");
5335 shrq(dst, LogMinObjAlignmentInBytes);
5336 }
5337 }
5338
5339 void MacroAssembler::decode_heap_oop(Register r) {
5340 #ifdef ASSERT
5341 verify_heapbase("MacroAssembler::decode_heap_oop: heap base corrupted?");
5342 #endif
5343 if (CompressedOops::base() == nullptr) {
5344 if (CompressedOops::shift() != 0) {
5345 assert (LogMinObjAlignmentInBytes == CompressedOops::shift(), "decode alg wrong");
5346 shlq(r, LogMinObjAlignmentInBytes);
5347 }
5348 } else {
5349 Label done;
5350 shlq(r, LogMinObjAlignmentInBytes);
5351 jccb(Assembler::equal, done);
5352 addq(r, r12_heapbase);
5353 bind(done);
5354 }
5355 verify_oop_msg(r, "broken oop in decode_heap_oop");
5356 }
5357
5358 void MacroAssembler::decode_heap_oop_not_null(Register r) {
5359 // Note: it will change flags
5360 assert (UseCompressedOops, "should only be used for compressed headers");
5361 assert (Universe::heap() != nullptr, "java heap should be initialized");
5362 // Cannot assert, unverified entry point counts instructions (see .ad file)
5363 // vtableStubs also counts instructions in pd_code_size_limit.
5364 // Also do not verify_oop as this is called by verify_oop.
5365 if (CompressedOops::shift() != 0) {
5366 assert(LogMinObjAlignmentInBytes == CompressedOops::shift(), "decode alg wrong");
5367 shlq(r, LogMinObjAlignmentInBytes);
5368 if (CompressedOops::base() != nullptr) {
5369 addq(r, r12_heapbase);
5370 }
5371 } else {
5372 assert (CompressedOops::base() == nullptr, "sanity");
5373 }
5374 }
5375
5376 void MacroAssembler::decode_heap_oop_not_null(Register dst, Register src) {
5377 // Note: it will change flags
5378 assert (UseCompressedOops, "should only be used for compressed headers");
5379 assert (Universe::heap() != nullptr, "java heap should be initialized");
5380 // Cannot assert, unverified entry point counts instructions (see .ad file)
5381 // vtableStubs also counts instructions in pd_code_size_limit.
5382 // Also do not verify_oop as this is called by verify_oop.
5383 if (CompressedOops::shift() != 0) {
5384 assert(LogMinObjAlignmentInBytes == CompressedOops::shift(), "decode alg wrong");
5385 if (LogMinObjAlignmentInBytes == Address::times_8) {
5386 leaq(dst, Address(r12_heapbase, src, Address::times_8, 0));
5387 } else {
5388 if (dst != src) {
5389 movq(dst, src);
5390 }
5391 shlq(dst, LogMinObjAlignmentInBytes);
5392 if (CompressedOops::base() != nullptr) {
5393 addq(dst, r12_heapbase);
5394 }
5395 }
5396 } else {
5397 assert (CompressedOops::base() == nullptr, "sanity");
5398 if (dst != src) {
5399 movq(dst, src);
5400 }
5401 }
5402 }
5403
5404 void MacroAssembler::encode_klass_not_null(Register r, Register tmp) {
5405 assert_different_registers(r, tmp);
5406 if (CompressedKlassPointers::base() != nullptr) {
5407 mov64(tmp, (int64_t)CompressedKlassPointers::base());
5408 subq(r, tmp);
5409 }
5410 if (CompressedKlassPointers::shift() != 0) {
5411 shrq(r, CompressedKlassPointers::shift());
5412 }
5413 }
5414
5415 void MacroAssembler::encode_and_move_klass_not_null(Register dst, Register src) {
5416 assert_different_registers(src, dst);
5417 if (CompressedKlassPointers::base() != nullptr) {
5418 mov64(dst, -(int64_t)CompressedKlassPointers::base());
5419 addq(dst, src);
5420 } else {
5421 movptr(dst, src);
5422 }
5423 if (CompressedKlassPointers::shift() != 0) {
5424 shrq(dst, CompressedKlassPointers::shift());
5425 }
5426 }
5427
5428 void MacroAssembler::decode_klass_not_null(Register r, Register tmp) {
5429 assert_different_registers(r, tmp);
5430 // Note: it will change flags
5431 assert(UseCompressedClassPointers, "should only be used for compressed headers");
5432 // Cannot assert, unverified entry point counts instructions (see .ad file)
5433 // vtableStubs also counts instructions in pd_code_size_limit.
5434 // Also do not verify_oop as this is called by verify_oop.
5435 if (CompressedKlassPointers::shift() != 0) {
5436 shlq(r, CompressedKlassPointers::shift());
5437 }
5438 if (CompressedKlassPointers::base() != nullptr) {
5439 mov64(tmp, (int64_t)CompressedKlassPointers::base());
5440 addq(r, tmp);
5441 }
5442 }
5443
5444 void MacroAssembler::decode_and_move_klass_not_null(Register dst, Register src) {
5445 assert_different_registers(src, dst);
5446 // Note: it will change flags
5447 assert (UseCompressedClassPointers, "should only be used for compressed headers");
5448 // Cannot assert, unverified entry point counts instructions (see .ad file)
5449 // vtableStubs also counts instructions in pd_code_size_limit.
5450 // Also do not verify_oop as this is called by verify_oop.
5451
5452 if (CompressedKlassPointers::base() == nullptr &&
5453 CompressedKlassPointers::shift() == 0) {
5454 // The best case scenario is that there is no base or shift. Then it is already
5455 // a pointer that needs nothing but a register rename.
5456 movl(dst, src);
5457 } else {
5458 if (CompressedKlassPointers::shift() <= Address::times_8) {
5459 if (CompressedKlassPointers::base() != nullptr) {
5460 mov64(dst, (int64_t)CompressedKlassPointers::base());
5461 } else {
5462 xorq(dst, dst);
5463 }
5464 if (CompressedKlassPointers::shift() != 0) {
5465 assert(CompressedKlassPointers::shift() == Address::times_8, "klass not aligned on 64bits?");
5466 leaq(dst, Address(dst, src, Address::times_8, 0));
5467 } else {
5468 addq(dst, src);
5469 }
5470 } else {
5471 if (CompressedKlassPointers::base() != nullptr) {
5472 const uint64_t base_right_shifted =
5473 (uint64_t)CompressedKlassPointers::base() >> CompressedKlassPointers::shift();
5474 mov64(dst, base_right_shifted);
5475 } else {
5476 xorq(dst, dst);
5477 }
5478 addq(dst, src);
5479 shlq(dst, CompressedKlassPointers::shift());
5480 }
5481 }
5482 }
5483
5484 void MacroAssembler::set_narrow_oop(Register dst, jobject obj) {
5485 assert (UseCompressedOops, "should only be used for compressed headers");
5486 assert (Universe::heap() != nullptr, "java heap should be initialized");
5487 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
5488 int oop_index = oop_recorder()->find_index(obj);
5489 RelocationHolder rspec = oop_Relocation::spec(oop_index);
5490 mov_narrow_oop(dst, oop_index, rspec);
5491 }
5492
5493 void MacroAssembler::set_narrow_oop(Address dst, jobject obj) {
5494 assert (UseCompressedOops, "should only be used for compressed headers");
5495 assert (Universe::heap() != nullptr, "java heap should be initialized");
5496 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
5497 int oop_index = oop_recorder()->find_index(obj);
5498 RelocationHolder rspec = oop_Relocation::spec(oop_index);
5499 mov_narrow_oop(dst, oop_index, rspec);
5500 }
5501
5502 void MacroAssembler::set_narrow_klass(Register dst, Klass* k) {
5503 assert (UseCompressedClassPointers, "should only be used for compressed headers");
5504 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
5505 int klass_index = oop_recorder()->find_index(k);
5506 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
5507 mov_narrow_oop(dst, CompressedKlassPointers::encode(k), rspec);
5508 }
5509
5510 void MacroAssembler::set_narrow_klass(Address dst, Klass* k) {
5511 assert (UseCompressedClassPointers, "should only be used for compressed headers");
5512 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
5513 int klass_index = oop_recorder()->find_index(k);
5514 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
5515 mov_narrow_oop(dst, CompressedKlassPointers::encode(k), rspec);
5516 }
5517
5518 void MacroAssembler::cmp_narrow_oop(Register dst, jobject obj) {
5519 assert (UseCompressedOops, "should only be used for compressed headers");
5520 assert (Universe::heap() != nullptr, "java heap should be initialized");
5521 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
5522 int oop_index = oop_recorder()->find_index(obj);
5523 RelocationHolder rspec = oop_Relocation::spec(oop_index);
5524 Assembler::cmp_narrow_oop(dst, oop_index, rspec);
5525 }
5526
5527 void MacroAssembler::cmp_narrow_oop(Address dst, jobject obj) {
5528 assert (UseCompressedOops, "should only be used for compressed headers");
5529 assert (Universe::heap() != nullptr, "java heap should be initialized");
5530 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
5531 int oop_index = oop_recorder()->find_index(obj);
5532 RelocationHolder rspec = oop_Relocation::spec(oop_index);
5533 Assembler::cmp_narrow_oop(dst, oop_index, rspec);
5534 }
5535
5536 void MacroAssembler::cmp_narrow_klass(Register dst, Klass* k) {
5537 assert (UseCompressedClassPointers, "should only be used for compressed headers");
5538 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
5539 int klass_index = oop_recorder()->find_index(k);
5540 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
5541 Assembler::cmp_narrow_oop(dst, CompressedKlassPointers::encode(k), rspec);
5542 }
5543
5544 void MacroAssembler::cmp_narrow_klass(Address dst, Klass* k) {
5545 assert (UseCompressedClassPointers, "should only be used for compressed headers");
5546 assert (oop_recorder() != nullptr, "this assembler needs an OopRecorder");
5547 int klass_index = oop_recorder()->find_index(k);
5548 RelocationHolder rspec = metadata_Relocation::spec(klass_index);
5549 Assembler::cmp_narrow_oop(dst, CompressedKlassPointers::encode(k), rspec);
5550 }
5551
5552 void MacroAssembler::reinit_heapbase() {
5553 if (UseCompressedOops) {
5554 if (Universe::heap() != nullptr) {
5555 if (CompressedOops::base() == nullptr) {
5556 MacroAssembler::xorptr(r12_heapbase, r12_heapbase);
5557 } else {
5558 mov64(r12_heapbase, (int64_t)CompressedOops::base());
5559 }
5560 } else {
5561 movptr(r12_heapbase, ExternalAddress(CompressedOops::base_addr()));
5562 }
5563 }
5564 }
5565
5566 #if COMPILER2_OR_JVMCI
5567
5568 // clear memory of size 'cnt' qwords, starting at 'base' using XMM/YMM/ZMM registers
5569 void MacroAssembler::xmm_clear_mem(Register base, Register cnt, Register rtmp, XMMRegister xtmp, KRegister mask) {
5570 // cnt - number of qwords (8-byte words).
5571 // base - start address, qword aligned.
5572 Label L_zero_64_bytes, L_loop, L_sloop, L_tail, L_end;
5573 bool use64byteVector = (MaxVectorSize == 64) && (VM_Version::avx3_threshold() == 0);
5574 if (use64byteVector) {
5575 vpxor(xtmp, xtmp, xtmp, AVX_512bit);
5576 } else if (MaxVectorSize >= 32) {
5577 vpxor(xtmp, xtmp, xtmp, AVX_256bit);
5578 } else {
5579 pxor(xtmp, xtmp);
5580 }
5581 jmp(L_zero_64_bytes);
5582
5583 BIND(L_loop);
5584 if (MaxVectorSize >= 32) {
5585 fill64(base, 0, xtmp, use64byteVector);
5586 } else {
5587 movdqu(Address(base, 0), xtmp);
5588 movdqu(Address(base, 16), xtmp);
5589 movdqu(Address(base, 32), xtmp);
5590 movdqu(Address(base, 48), xtmp);
5591 }
5592 addptr(base, 64);
5593
5594 BIND(L_zero_64_bytes);
5595 subptr(cnt, 8);
5596 jccb(Assembler::greaterEqual, L_loop);
5597
5598 // Copy trailing 64 bytes
5599 if (use64byteVector) {
5600 addptr(cnt, 8);
5601 jccb(Assembler::equal, L_end);
5602 fill64_masked(3, base, 0, xtmp, mask, cnt, rtmp, true);
5603 jmp(L_end);
5604 } else {
5605 addptr(cnt, 4);
5606 jccb(Assembler::less, L_tail);
5607 if (MaxVectorSize >= 32) {
5608 vmovdqu(Address(base, 0), xtmp);
5609 } else {
5610 movdqu(Address(base, 0), xtmp);
5611 movdqu(Address(base, 16), xtmp);
5612 }
5613 }
5614 addptr(base, 32);
5615 subptr(cnt, 4);
5616
5617 BIND(L_tail);
5618 addptr(cnt, 4);
5619 jccb(Assembler::lessEqual, L_end);
5620 if (UseAVX > 2 && MaxVectorSize >= 32 && VM_Version::supports_avx512vl()) {
5621 fill32_masked(3, base, 0, xtmp, mask, cnt, rtmp);
5622 } else {
5623 decrement(cnt);
5624
5625 BIND(L_sloop);
5626 movq(Address(base, 0), xtmp);
5627 addptr(base, 8);
5628 decrement(cnt);
5629 jccb(Assembler::greaterEqual, L_sloop);
5630 }
5631 BIND(L_end);
5632 }
5633
5634 // Clearing constant sized memory using YMM/ZMM registers.
5635 void MacroAssembler::clear_mem(Register base, int cnt, Register rtmp, XMMRegister xtmp, KRegister mask) {
5636 assert(UseAVX > 2 && VM_Version::supports_avx512vl(), "");
5637 bool use64byteVector = (MaxVectorSize > 32) && (VM_Version::avx3_threshold() == 0);
5638
5639 int vector64_count = (cnt & (~0x7)) >> 3;
5640 cnt = cnt & 0x7;
5641 const int fill64_per_loop = 4;
5642 const int max_unrolled_fill64 = 8;
5643
5644 // 64 byte initialization loop.
5645 vpxor(xtmp, xtmp, xtmp, use64byteVector ? AVX_512bit : AVX_256bit);
5646 int start64 = 0;
5647 if (vector64_count > max_unrolled_fill64) {
5648 Label LOOP;
5649 Register index = rtmp;
5650
5651 start64 = vector64_count - (vector64_count % fill64_per_loop);
5652
5653 movl(index, 0);
5654 BIND(LOOP);
5655 for (int i = 0; i < fill64_per_loop; i++) {
5656 fill64(Address(base, index, Address::times_1, i * 64), xtmp, use64byteVector);
5657 }
5658 addl(index, fill64_per_loop * 64);
5659 cmpl(index, start64 * 64);
5660 jccb(Assembler::less, LOOP);
5661 }
5662 for (int i = start64; i < vector64_count; i++) {
5663 fill64(base, i * 64, xtmp, use64byteVector);
5664 }
5665
5666 // Clear remaining 64 byte tail.
5667 int disp = vector64_count * 64;
5668 if (cnt) {
5669 switch (cnt) {
5670 case 1:
5671 movq(Address(base, disp), xtmp);
5672 break;
5673 case 2:
5674 evmovdqu(T_LONG, k0, Address(base, disp), xtmp, false, Assembler::AVX_128bit);
5675 break;
5676 case 3:
5677 movl(rtmp, 0x7);
5678 kmovwl(mask, rtmp);
5679 evmovdqu(T_LONG, mask, Address(base, disp), xtmp, true, Assembler::AVX_256bit);
5680 break;
5681 case 4:
5682 evmovdqu(T_LONG, k0, Address(base, disp), xtmp, false, Assembler::AVX_256bit);
5683 break;
5684 case 5:
5685 if (use64byteVector) {
5686 movl(rtmp, 0x1F);
5687 kmovwl(mask, rtmp);
5688 evmovdqu(T_LONG, mask, Address(base, disp), xtmp, true, Assembler::AVX_512bit);
5689 } else {
5690 evmovdqu(T_LONG, k0, Address(base, disp), xtmp, false, Assembler::AVX_256bit);
5691 movq(Address(base, disp + 32), xtmp);
5692 }
5693 break;
5694 case 6:
5695 if (use64byteVector) {
5696 movl(rtmp, 0x3F);
5697 kmovwl(mask, rtmp);
5698 evmovdqu(T_LONG, mask, Address(base, disp), xtmp, true, Assembler::AVX_512bit);
5699 } else {
5700 evmovdqu(T_LONG, k0, Address(base, disp), xtmp, false, Assembler::AVX_256bit);
5701 evmovdqu(T_LONG, k0, Address(base, disp + 32), xtmp, false, Assembler::AVX_128bit);
5702 }
5703 break;
5704 case 7:
5705 if (use64byteVector) {
5706 movl(rtmp, 0x7F);
5707 kmovwl(mask, rtmp);
5708 evmovdqu(T_LONG, mask, Address(base, disp), xtmp, true, Assembler::AVX_512bit);
5709 } else {
5710 evmovdqu(T_LONG, k0, Address(base, disp), xtmp, false, Assembler::AVX_256bit);
5711 movl(rtmp, 0x7);
5712 kmovwl(mask, rtmp);
5713 evmovdqu(T_LONG, mask, Address(base, disp + 32), xtmp, true, Assembler::AVX_256bit);
5714 }
5715 break;
5716 default:
5717 fatal("Unexpected length : %d\n",cnt);
5718 break;
5719 }
5720 }
5721 }
5722
5723 void MacroAssembler::clear_mem(Register base, Register cnt, Register tmp, XMMRegister xtmp,
5724 bool is_large, KRegister mask) {
5725 // cnt - number of qwords (8-byte words).
5726 // base - start address, qword aligned.
5727 // is_large - if optimizers know cnt is larger than InitArrayShortSize
5728 assert(base==rdi, "base register must be edi for rep stos");
5729 assert(tmp==rax, "tmp register must be eax for rep stos");
5730 assert(cnt==rcx, "cnt register must be ecx for rep stos");
5731 assert(InitArrayShortSize % BytesPerLong == 0,
5732 "InitArrayShortSize should be the multiple of BytesPerLong");
5733
5734 Label DONE;
5735 if (!is_large || !UseXMMForObjInit) {
5736 xorptr(tmp, tmp);
5737 }
5738
5739 if (!is_large) {
5740 Label LOOP, LONG;
5741 cmpptr(cnt, InitArrayShortSize/BytesPerLong);
5742 jccb(Assembler::greater, LONG);
5743
5744 decrement(cnt);
5745 jccb(Assembler::negative, DONE); // Zero length
5746
5747 // Use individual pointer-sized stores for small counts:
5748 BIND(LOOP);
5749 movptr(Address(base, cnt, Address::times_ptr), tmp);
5750 decrement(cnt);
5751 jccb(Assembler::greaterEqual, LOOP);
5752 jmpb(DONE);
5753
5754 BIND(LONG);
5755 }
5756
5757 // Use longer rep-prefixed ops for non-small counts:
5758 if (UseFastStosb) {
5759 shlptr(cnt, 3); // convert to number of bytes
5760 rep_stosb();
5761 } else if (UseXMMForObjInit) {
5762 xmm_clear_mem(base, cnt, tmp, xtmp, mask);
5763 } else {
5764 rep_stos();
5765 }
5766
5767 BIND(DONE);
5768 }
5769
5770 #endif //COMPILER2_OR_JVMCI
5771
5772
5773 void MacroAssembler::generate_fill(BasicType t, bool aligned,
5774 Register to, Register value, Register count,
5775 Register rtmp, XMMRegister xtmp) {
5776 ShortBranchVerifier sbv(this);
5777 assert_different_registers(to, value, count, rtmp);
5778 Label L_exit;
5779 Label L_fill_2_bytes, L_fill_4_bytes;
5780
5781 #if defined(COMPILER2)
5782 if(MaxVectorSize >=32 &&
5783 VM_Version::supports_avx512vlbw() &&
5784 VM_Version::supports_bmi2()) {
5785 generate_fill_avx3(t, to, value, count, rtmp, xtmp);
5786 return;
5787 }
5788 #endif
5789
5790 int shift = -1;
5791 switch (t) {
5792 case T_BYTE:
5793 shift = 2;
5794 break;
5795 case T_SHORT:
5796 shift = 1;
5797 break;
5798 case T_INT:
5799 shift = 0;
5800 break;
5801 default: ShouldNotReachHere();
5802 }
5803
5804 if (t == T_BYTE) {
5805 andl(value, 0xff);
5806 movl(rtmp, value);
5807 shll(rtmp, 8);
5808 orl(value, rtmp);
5809 }
5810 if (t == T_SHORT) {
5811 andl(value, 0xffff);
5812 }
5813 if (t == T_BYTE || t == T_SHORT) {
5814 movl(rtmp, value);
5815 shll(rtmp, 16);
5816 orl(value, rtmp);
5817 }
5818
5819 cmpptr(count, 2<<shift); // Short arrays (< 8 bytes) fill by element
5820 jcc(Assembler::below, L_fill_4_bytes); // use unsigned cmp
5821 if (!UseUnalignedLoadStores && !aligned && (t == T_BYTE || t == T_SHORT)) {
5822 Label L_skip_align2;
5823 // align source address at 4 bytes address boundary
5824 if (t == T_BYTE) {
5825 Label L_skip_align1;
5826 // One byte misalignment happens only for byte arrays
5827 testptr(to, 1);
5828 jccb(Assembler::zero, L_skip_align1);
5829 movb(Address(to, 0), value);
5830 increment(to);
5831 decrement(count);
5832 BIND(L_skip_align1);
5833 }
5834 // Two bytes misalignment happens only for byte and short (char) arrays
5835 testptr(to, 2);
5836 jccb(Assembler::zero, L_skip_align2);
5837 movw(Address(to, 0), value);
5838 addptr(to, 2);
5839 subptr(count, 1<<(shift-1));
5840 BIND(L_skip_align2);
5841 }
5842 {
5843 Label L_fill_32_bytes;
5844 if (!UseUnalignedLoadStores) {
5845 // align to 8 bytes, we know we are 4 byte aligned to start
5846 testptr(to, 4);
5847 jccb(Assembler::zero, L_fill_32_bytes);
5848 movl(Address(to, 0), value);
5849 addptr(to, 4);
5850 subptr(count, 1<<shift);
5851 }
5852 BIND(L_fill_32_bytes);
5853 {
5854 Label L_fill_32_bytes_loop, L_check_fill_8_bytes, L_fill_8_bytes_loop, L_fill_8_bytes;
5855 movdl(xtmp, value);
5856 if (UseAVX >= 2 && UseUnalignedLoadStores) {
5857 Label L_check_fill_32_bytes;
5858 if (UseAVX > 2) {
5859 // Fill 64-byte chunks
5860 Label L_fill_64_bytes_loop_avx3, L_check_fill_64_bytes_avx2;
5861
5862 // If number of bytes to fill < VM_Version::avx3_threshold(), perform fill using AVX2
5863 cmpptr(count, VM_Version::avx3_threshold());
5864 jccb(Assembler::below, L_check_fill_64_bytes_avx2);
5865
5866 vpbroadcastd(xtmp, xtmp, Assembler::AVX_512bit);
5867
5868 subptr(count, 16 << shift);
5869 jccb(Assembler::less, L_check_fill_32_bytes);
5870 align(16);
5871
5872 BIND(L_fill_64_bytes_loop_avx3);
5873 evmovdqul(Address(to, 0), xtmp, Assembler::AVX_512bit);
5874 addptr(to, 64);
5875 subptr(count, 16 << shift);
5876 jcc(Assembler::greaterEqual, L_fill_64_bytes_loop_avx3);
5877 jmpb(L_check_fill_32_bytes);
5878
5879 BIND(L_check_fill_64_bytes_avx2);
5880 }
5881 // Fill 64-byte chunks
5882 Label L_fill_64_bytes_loop;
5883 vpbroadcastd(xtmp, xtmp, Assembler::AVX_256bit);
5884
5885 subptr(count, 16 << shift);
5886 jcc(Assembler::less, L_check_fill_32_bytes);
5887 align(16);
5888
5889 BIND(L_fill_64_bytes_loop);
5890 vmovdqu(Address(to, 0), xtmp);
5891 vmovdqu(Address(to, 32), xtmp);
5892 addptr(to, 64);
5893 subptr(count, 16 << shift);
5894 jcc(Assembler::greaterEqual, L_fill_64_bytes_loop);
5895
5896 BIND(L_check_fill_32_bytes);
5897 addptr(count, 8 << shift);
5898 jccb(Assembler::less, L_check_fill_8_bytes);
5899 vmovdqu(Address(to, 0), xtmp);
5900 addptr(to, 32);
5901 subptr(count, 8 << shift);
5902
5903 BIND(L_check_fill_8_bytes);
5904 // clean upper bits of YMM registers
5905 movdl(xtmp, value);
5906 pshufd(xtmp, xtmp, 0);
5907 } else {
5908 // Fill 32-byte chunks
5909 pshufd(xtmp, xtmp, 0);
5910
5911 subptr(count, 8 << shift);
5912 jcc(Assembler::less, L_check_fill_8_bytes);
5913 align(16);
5914
5915 BIND(L_fill_32_bytes_loop);
5916
5917 if (UseUnalignedLoadStores) {
5918 movdqu(Address(to, 0), xtmp);
5919 movdqu(Address(to, 16), xtmp);
5920 } else {
5921 movq(Address(to, 0), xtmp);
5922 movq(Address(to, 8), xtmp);
5923 movq(Address(to, 16), xtmp);
5924 movq(Address(to, 24), xtmp);
5925 }
5926
5927 addptr(to, 32);
5928 subptr(count, 8 << shift);
5929 jcc(Assembler::greaterEqual, L_fill_32_bytes_loop);
5930
5931 BIND(L_check_fill_8_bytes);
5932 }
5933 addptr(count, 8 << shift);
5934 jccb(Assembler::zero, L_exit);
5935 jmpb(L_fill_8_bytes);
5936
5937 //
5938 // length is too short, just fill qwords
5939 //
5940 BIND(L_fill_8_bytes_loop);
5941 movq(Address(to, 0), xtmp);
5942 addptr(to, 8);
5943 BIND(L_fill_8_bytes);
5944 subptr(count, 1 << (shift + 1));
5945 jcc(Assembler::greaterEqual, L_fill_8_bytes_loop);
5946 }
5947 }
5948 // fill trailing 4 bytes
5949 BIND(L_fill_4_bytes);
5950 testl(count, 1<<shift);
5951 jccb(Assembler::zero, L_fill_2_bytes);
5952 movl(Address(to, 0), value);
5953 if (t == T_BYTE || t == T_SHORT) {
5954 Label L_fill_byte;
5955 addptr(to, 4);
5956 BIND(L_fill_2_bytes);
5957 // fill trailing 2 bytes
5958 testl(count, 1<<(shift-1));
5959 jccb(Assembler::zero, L_fill_byte);
5960 movw(Address(to, 0), value);
5961 if (t == T_BYTE) {
5962 addptr(to, 2);
5963 BIND(L_fill_byte);
5964 // fill trailing byte
5965 testl(count, 1);
5966 jccb(Assembler::zero, L_exit);
5967 movb(Address(to, 0), value);
5968 } else {
5969 BIND(L_fill_byte);
5970 }
5971 } else {
5972 BIND(L_fill_2_bytes);
5973 }
5974 BIND(L_exit);
5975 }
5976
5977 void MacroAssembler::evpbroadcast(BasicType type, XMMRegister dst, Register src, int vector_len) {
5978 switch(type) {
5979 case T_BYTE:
5980 case T_BOOLEAN:
5981 evpbroadcastb(dst, src, vector_len);
5982 break;
5983 case T_SHORT:
5984 case T_CHAR:
5985 evpbroadcastw(dst, src, vector_len);
5986 break;
5987 case T_INT:
5988 case T_FLOAT:
5989 evpbroadcastd(dst, src, vector_len);
5990 break;
5991 case T_LONG:
5992 case T_DOUBLE:
5993 evpbroadcastq(dst, src, vector_len);
5994 break;
5995 default:
5996 fatal("Unhandled type : %s", type2name(type));
5997 break;
5998 }
5999 }
6000
6001 // encode char[] to byte[] in ISO_8859_1 or ASCII
6002 //@IntrinsicCandidate
6003 //private static int implEncodeISOArray(byte[] sa, int sp,
6004 //byte[] da, int dp, int len) {
6005 // int i = 0;
6006 // for (; i < len; i++) {
6007 // char c = StringUTF16.getChar(sa, sp++);
6008 // if (c > '\u00FF')
6009 // break;
6010 // da[dp++] = (byte)c;
6011 // }
6012 // return i;
6013 //}
6014 //
6015 //@IntrinsicCandidate
6016 //private static int implEncodeAsciiArray(char[] sa, int sp,
6017 // byte[] da, int dp, int len) {
6018 // int i = 0;
6019 // for (; i < len; i++) {
6020 // char c = sa[sp++];
6021 // if (c >= '\u0080')
6022 // break;
6023 // da[dp++] = (byte)c;
6024 // }
6025 // return i;
6026 //}
6027 void MacroAssembler::encode_iso_array(Register src, Register dst, Register len,
6028 XMMRegister tmp1Reg, XMMRegister tmp2Reg,
6029 XMMRegister tmp3Reg, XMMRegister tmp4Reg,
6030 Register tmp5, Register result, bool ascii) {
6031
6032 // rsi: src
6033 // rdi: dst
6034 // rdx: len
6035 // rcx: tmp5
6036 // rax: result
6037 ShortBranchVerifier sbv(this);
6038 assert_different_registers(src, dst, len, tmp5, result);
6039 Label L_done, L_copy_1_char, L_copy_1_char_exit;
6040
6041 int mask = ascii ? 0xff80ff80 : 0xff00ff00;
6042 int short_mask = ascii ? 0xff80 : 0xff00;
6043
6044 // set result
6045 xorl(result, result);
6046 // check for zero length
6047 testl(len, len);
6048 jcc(Assembler::zero, L_done);
6049
6050 movl(result, len);
6051
6052 // Setup pointers
6053 lea(src, Address(src, len, Address::times_2)); // char[]
6054 lea(dst, Address(dst, len, Address::times_1)); // byte[]
6055 negptr(len);
6056
6057 if (UseSSE42Intrinsics || UseAVX >= 2) {
6058 Label L_copy_8_chars, L_copy_8_chars_exit;
6059 Label L_chars_16_check, L_copy_16_chars, L_copy_16_chars_exit;
6060
6061 if (UseAVX >= 2) {
6062 Label L_chars_32_check, L_copy_32_chars, L_copy_32_chars_exit;
6063 movl(tmp5, mask); // create mask to test for Unicode or non-ASCII chars in vector
6064 movdl(tmp1Reg, tmp5);
6065 vpbroadcastd(tmp1Reg, tmp1Reg, Assembler::AVX_256bit);
6066 jmp(L_chars_32_check);
6067
6068 bind(L_copy_32_chars);
6069 vmovdqu(tmp3Reg, Address(src, len, Address::times_2, -64));
6070 vmovdqu(tmp4Reg, Address(src, len, Address::times_2, -32));
6071 vpor(tmp2Reg, tmp3Reg, tmp4Reg, /* vector_len */ 1);
6072 vptest(tmp2Reg, tmp1Reg); // check for Unicode or non-ASCII chars in vector
6073 jccb(Assembler::notZero, L_copy_32_chars_exit);
6074 vpackuswb(tmp3Reg, tmp3Reg, tmp4Reg, /* vector_len */ 1);
6075 vpermq(tmp4Reg, tmp3Reg, 0xD8, /* vector_len */ 1);
6076 vmovdqu(Address(dst, len, Address::times_1, -32), tmp4Reg);
6077
6078 bind(L_chars_32_check);
6079 addptr(len, 32);
6080 jcc(Assembler::lessEqual, L_copy_32_chars);
6081
6082 bind(L_copy_32_chars_exit);
6083 subptr(len, 16);
6084 jccb(Assembler::greater, L_copy_16_chars_exit);
6085
6086 } else if (UseSSE42Intrinsics) {
6087 movl(tmp5, mask); // create mask to test for Unicode or non-ASCII chars in vector
6088 movdl(tmp1Reg, tmp5);
6089 pshufd(tmp1Reg, tmp1Reg, 0);
6090 jmpb(L_chars_16_check);
6091 }
6092
6093 bind(L_copy_16_chars);
6094 if (UseAVX >= 2) {
6095 vmovdqu(tmp2Reg, Address(src, len, Address::times_2, -32));
6096 vptest(tmp2Reg, tmp1Reg);
6097 jcc(Assembler::notZero, L_copy_16_chars_exit);
6098 vpackuswb(tmp2Reg, tmp2Reg, tmp1Reg, /* vector_len */ 1);
6099 vpermq(tmp3Reg, tmp2Reg, 0xD8, /* vector_len */ 1);
6100 } else {
6101 if (UseAVX > 0) {
6102 movdqu(tmp3Reg, Address(src, len, Address::times_2, -32));
6103 movdqu(tmp4Reg, Address(src, len, Address::times_2, -16));
6104 vpor(tmp2Reg, tmp3Reg, tmp4Reg, /* vector_len */ 0);
6105 } else {
6106 movdqu(tmp3Reg, Address(src, len, Address::times_2, -32));
6107 por(tmp2Reg, tmp3Reg);
6108 movdqu(tmp4Reg, Address(src, len, Address::times_2, -16));
6109 por(tmp2Reg, tmp4Reg);
6110 }
6111 ptest(tmp2Reg, tmp1Reg); // check for Unicode or non-ASCII chars in vector
6112 jccb(Assembler::notZero, L_copy_16_chars_exit);
6113 packuswb(tmp3Reg, tmp4Reg);
6114 }
6115 movdqu(Address(dst, len, Address::times_1, -16), tmp3Reg);
6116
6117 bind(L_chars_16_check);
6118 addptr(len, 16);
6119 jcc(Assembler::lessEqual, L_copy_16_chars);
6120
6121 bind(L_copy_16_chars_exit);
6122 if (UseAVX >= 2) {
6123 // clean upper bits of YMM registers
6124 vpxor(tmp2Reg, tmp2Reg);
6125 vpxor(tmp3Reg, tmp3Reg);
6126 vpxor(tmp4Reg, tmp4Reg);
6127 movdl(tmp1Reg, tmp5);
6128 pshufd(tmp1Reg, tmp1Reg, 0);
6129 }
6130 subptr(len, 8);
6131 jccb(Assembler::greater, L_copy_8_chars_exit);
6132
6133 bind(L_copy_8_chars);
6134 movdqu(tmp3Reg, Address(src, len, Address::times_2, -16));
6135 ptest(tmp3Reg, tmp1Reg);
6136 jccb(Assembler::notZero, L_copy_8_chars_exit);
6137 packuswb(tmp3Reg, tmp1Reg);
6138 movq(Address(dst, len, Address::times_1, -8), tmp3Reg);
6139 addptr(len, 8);
6140 jccb(Assembler::lessEqual, L_copy_8_chars);
6141
6142 bind(L_copy_8_chars_exit);
6143 subptr(len, 8);
6144 jccb(Assembler::zero, L_done);
6145 }
6146
6147 bind(L_copy_1_char);
6148 load_unsigned_short(tmp5, Address(src, len, Address::times_2, 0));
6149 testl(tmp5, short_mask); // check if Unicode or non-ASCII char
6150 jccb(Assembler::notZero, L_copy_1_char_exit);
6151 movb(Address(dst, len, Address::times_1, 0), tmp5);
6152 addptr(len, 1);
6153 jccb(Assembler::less, L_copy_1_char);
6154
6155 bind(L_copy_1_char_exit);
6156 addptr(result, len); // len is negative count of not processed elements
6157
6158 bind(L_done);
6159 }
6160
6161 /**
6162 * Helper for multiply_to_len().
6163 */
6164 void MacroAssembler::add2_with_carry(Register dest_hi, Register dest_lo, Register src1, Register src2) {
6165 addq(dest_lo, src1);
6166 adcq(dest_hi, 0);
6167 addq(dest_lo, src2);
6168 adcq(dest_hi, 0);
6169 }
6170
6171 /**
6172 * Multiply 64 bit by 64 bit first loop.
6173 */
6174 void MacroAssembler::multiply_64_x_64_loop(Register x, Register xstart, Register x_xstart,
6175 Register y, Register y_idx, Register z,
6176 Register carry, Register product,
6177 Register idx, Register kdx) {
6178 //
6179 // jlong carry, x[], y[], z[];
6180 // for (int idx=ystart, kdx=ystart+1+xstart; idx >= 0; idx-, kdx--) {
6181 // huge_128 product = y[idx] * x[xstart] + carry;
6182 // z[kdx] = (jlong)product;
6183 // carry = (jlong)(product >>> 64);
6184 // }
6185 // z[xstart] = carry;
6186 //
6187
6188 Label L_first_loop, L_first_loop_exit;
6189 Label L_one_x, L_one_y, L_multiply;
6190
6191 decrementl(xstart);
6192 jcc(Assembler::negative, L_one_x);
6193
6194 movq(x_xstart, Address(x, xstart, Address::times_4, 0));
6195 rorq(x_xstart, 32); // convert big-endian to little-endian
6196
6197 bind(L_first_loop);
6198 decrementl(idx);
6199 jcc(Assembler::negative, L_first_loop_exit);
6200 decrementl(idx);
6201 jcc(Assembler::negative, L_one_y);
6202 movq(y_idx, Address(y, idx, Address::times_4, 0));
6203 rorq(y_idx, 32); // convert big-endian to little-endian
6204 bind(L_multiply);
6205 movq(product, x_xstart);
6206 mulq(y_idx); // product(rax) * y_idx -> rdx:rax
6207 addq(product, carry);
6208 adcq(rdx, 0);
6209 subl(kdx, 2);
6210 movl(Address(z, kdx, Address::times_4, 4), product);
6211 shrq(product, 32);
6212 movl(Address(z, kdx, Address::times_4, 0), product);
6213 movq(carry, rdx);
6214 jmp(L_first_loop);
6215
6216 bind(L_one_y);
6217 movl(y_idx, Address(y, 0));
6218 jmp(L_multiply);
6219
6220 bind(L_one_x);
6221 movl(x_xstart, Address(x, 0));
6222 jmp(L_first_loop);
6223
6224 bind(L_first_loop_exit);
6225 }
6226
6227 /**
6228 * Multiply 64 bit by 64 bit and add 128 bit.
6229 */
6230 void MacroAssembler::multiply_add_128_x_128(Register x_xstart, Register y, Register z,
6231 Register yz_idx, Register idx,
6232 Register carry, Register product, int offset) {
6233 // huge_128 product = (y[idx] * x_xstart) + z[kdx] + carry;
6234 // z[kdx] = (jlong)product;
6235
6236 movq(yz_idx, Address(y, idx, Address::times_4, offset));
6237 rorq(yz_idx, 32); // convert big-endian to little-endian
6238 movq(product, x_xstart);
6239 mulq(yz_idx); // product(rax) * yz_idx -> rdx:product(rax)
6240 movq(yz_idx, Address(z, idx, Address::times_4, offset));
6241 rorq(yz_idx, 32); // convert big-endian to little-endian
6242
6243 add2_with_carry(rdx, product, carry, yz_idx);
6244
6245 movl(Address(z, idx, Address::times_4, offset+4), product);
6246 shrq(product, 32);
6247 movl(Address(z, idx, Address::times_4, offset), product);
6248
6249 }
6250
6251 /**
6252 * Multiply 128 bit by 128 bit. Unrolled inner loop.
6253 */
6254 void MacroAssembler::multiply_128_x_128_loop(Register x_xstart, Register y, Register z,
6255 Register yz_idx, Register idx, Register jdx,
6256 Register carry, Register product,
6257 Register carry2) {
6258 // jlong carry, x[], y[], z[];
6259 // int kdx = ystart+1;
6260 // for (int idx=ystart-2; idx >= 0; idx -= 2) { // Third loop
6261 // huge_128 product = (y[idx+1] * x_xstart) + z[kdx+idx+1] + carry;
6262 // z[kdx+idx+1] = (jlong)product;
6263 // jlong carry2 = (jlong)(product >>> 64);
6264 // product = (y[idx] * x_xstart) + z[kdx+idx] + carry2;
6265 // z[kdx+idx] = (jlong)product;
6266 // carry = (jlong)(product >>> 64);
6267 // }
6268 // idx += 2;
6269 // if (idx > 0) {
6270 // product = (y[idx] * x_xstart) + z[kdx+idx] + carry;
6271 // z[kdx+idx] = (jlong)product;
6272 // carry = (jlong)(product >>> 64);
6273 // }
6274 //
6275
6276 Label L_third_loop, L_third_loop_exit, L_post_third_loop_done;
6277
6278 movl(jdx, idx);
6279 andl(jdx, 0xFFFFFFFC);
6280 shrl(jdx, 2);
6281
6282 bind(L_third_loop);
6283 subl(jdx, 1);
6284 jcc(Assembler::negative, L_third_loop_exit);
6285 subl(idx, 4);
6286
6287 multiply_add_128_x_128(x_xstart, y, z, yz_idx, idx, carry, product, 8);
6288 movq(carry2, rdx);
6289
6290 multiply_add_128_x_128(x_xstart, y, z, yz_idx, idx, carry2, product, 0);
6291 movq(carry, rdx);
6292 jmp(L_third_loop);
6293
6294 bind (L_third_loop_exit);
6295
6296 andl (idx, 0x3);
6297 jcc(Assembler::zero, L_post_third_loop_done);
6298
6299 Label L_check_1;
6300 subl(idx, 2);
6301 jcc(Assembler::negative, L_check_1);
6302
6303 multiply_add_128_x_128(x_xstart, y, z, yz_idx, idx, carry, product, 0);
6304 movq(carry, rdx);
6305
6306 bind (L_check_1);
6307 addl (idx, 0x2);
6308 andl (idx, 0x1);
6309 subl(idx, 1);
6310 jcc(Assembler::negative, L_post_third_loop_done);
6311
6312 movl(yz_idx, Address(y, idx, Address::times_4, 0));
6313 movq(product, x_xstart);
6314 mulq(yz_idx); // product(rax) * yz_idx -> rdx:product(rax)
6315 movl(yz_idx, Address(z, idx, Address::times_4, 0));
6316
6317 add2_with_carry(rdx, product, yz_idx, carry);
6318
6319 movl(Address(z, idx, Address::times_4, 0), product);
6320 shrq(product, 32);
6321
6322 shlq(rdx, 32);
6323 orq(product, rdx);
6324 movq(carry, product);
6325
6326 bind(L_post_third_loop_done);
6327 }
6328
6329 /**
6330 * Multiply 128 bit by 128 bit using BMI2. Unrolled inner loop.
6331 *
6332 */
6333 void MacroAssembler::multiply_128_x_128_bmi2_loop(Register y, Register z,
6334 Register carry, Register carry2,
6335 Register idx, Register jdx,
6336 Register yz_idx1, Register yz_idx2,
6337 Register tmp, Register tmp3, Register tmp4) {
6338 assert(UseBMI2Instructions, "should be used only when BMI2 is available");
6339
6340 // jlong carry, x[], y[], z[];
6341 // int kdx = ystart+1;
6342 // for (int idx=ystart-2; idx >= 0; idx -= 2) { // Third loop
6343 // huge_128 tmp3 = (y[idx+1] * rdx) + z[kdx+idx+1] + carry;
6344 // jlong carry2 = (jlong)(tmp3 >>> 64);
6345 // huge_128 tmp4 = (y[idx] * rdx) + z[kdx+idx] + carry2;
6346 // carry = (jlong)(tmp4 >>> 64);
6347 // z[kdx+idx+1] = (jlong)tmp3;
6348 // z[kdx+idx] = (jlong)tmp4;
6349 // }
6350 // idx += 2;
6351 // if (idx > 0) {
6352 // yz_idx1 = (y[idx] * rdx) + z[kdx+idx] + carry;
6353 // z[kdx+idx] = (jlong)yz_idx1;
6354 // carry = (jlong)(yz_idx1 >>> 64);
6355 // }
6356 //
6357
6358 Label L_third_loop, L_third_loop_exit, L_post_third_loop_done;
6359
6360 movl(jdx, idx);
6361 andl(jdx, 0xFFFFFFFC);
6362 shrl(jdx, 2);
6363
6364 bind(L_third_loop);
6365 subl(jdx, 1);
6366 jcc(Assembler::negative, L_third_loop_exit);
6367 subl(idx, 4);
6368
6369 movq(yz_idx1, Address(y, idx, Address::times_4, 8));
6370 rorxq(yz_idx1, yz_idx1, 32); // convert big-endian to little-endian
6371 movq(yz_idx2, Address(y, idx, Address::times_4, 0));
6372 rorxq(yz_idx2, yz_idx2, 32);
6373
6374 mulxq(tmp4, tmp3, yz_idx1); // yz_idx1 * rdx -> tmp4:tmp3
6375 mulxq(carry2, tmp, yz_idx2); // yz_idx2 * rdx -> carry2:tmp
6376
6377 movq(yz_idx1, Address(z, idx, Address::times_4, 8));
6378 rorxq(yz_idx1, yz_idx1, 32);
6379 movq(yz_idx2, Address(z, idx, Address::times_4, 0));
6380 rorxq(yz_idx2, yz_idx2, 32);
6381
6382 if (VM_Version::supports_adx()) {
6383 adcxq(tmp3, carry);
6384 adoxq(tmp3, yz_idx1);
6385
6386 adcxq(tmp4, tmp);
6387 adoxq(tmp4, yz_idx2);
6388
6389 movl(carry, 0); // does not affect flags
6390 adcxq(carry2, carry);
6391 adoxq(carry2, carry);
6392 } else {
6393 add2_with_carry(tmp4, tmp3, carry, yz_idx1);
6394 add2_with_carry(carry2, tmp4, tmp, yz_idx2);
6395 }
6396 movq(carry, carry2);
6397
6398 movl(Address(z, idx, Address::times_4, 12), tmp3);
6399 shrq(tmp3, 32);
6400 movl(Address(z, idx, Address::times_4, 8), tmp3);
6401
6402 movl(Address(z, idx, Address::times_4, 4), tmp4);
6403 shrq(tmp4, 32);
6404 movl(Address(z, idx, Address::times_4, 0), tmp4);
6405
6406 jmp(L_third_loop);
6407
6408 bind (L_third_loop_exit);
6409
6410 andl (idx, 0x3);
6411 jcc(Assembler::zero, L_post_third_loop_done);
6412
6413 Label L_check_1;
6414 subl(idx, 2);
6415 jcc(Assembler::negative, L_check_1);
6416
6417 movq(yz_idx1, Address(y, idx, Address::times_4, 0));
6418 rorxq(yz_idx1, yz_idx1, 32);
6419 mulxq(tmp4, tmp3, yz_idx1); // yz_idx1 * rdx -> tmp4:tmp3
6420 movq(yz_idx2, Address(z, idx, Address::times_4, 0));
6421 rorxq(yz_idx2, yz_idx2, 32);
6422
6423 add2_with_carry(tmp4, tmp3, carry, yz_idx2);
6424
6425 movl(Address(z, idx, Address::times_4, 4), tmp3);
6426 shrq(tmp3, 32);
6427 movl(Address(z, idx, Address::times_4, 0), tmp3);
6428 movq(carry, tmp4);
6429
6430 bind (L_check_1);
6431 addl (idx, 0x2);
6432 andl (idx, 0x1);
6433 subl(idx, 1);
6434 jcc(Assembler::negative, L_post_third_loop_done);
6435 movl(tmp4, Address(y, idx, Address::times_4, 0));
6436 mulxq(carry2, tmp3, tmp4); // tmp4 * rdx -> carry2:tmp3
6437 movl(tmp4, Address(z, idx, Address::times_4, 0));
6438
6439 add2_with_carry(carry2, tmp3, tmp4, carry);
6440
6441 movl(Address(z, idx, Address::times_4, 0), tmp3);
6442 shrq(tmp3, 32);
6443
6444 shlq(carry2, 32);
6445 orq(tmp3, carry2);
6446 movq(carry, tmp3);
6447
6448 bind(L_post_third_loop_done);
6449 }
6450
6451 /**
6452 * Code for BigInteger::multiplyToLen() intrinsic.
6453 *
6454 * rdi: x
6455 * rax: xlen
6456 * rsi: y
6457 * rcx: ylen
6458 * r8: z
6459 * r11: tmp0
6460 * r12: tmp1
6461 * r13: tmp2
6462 * r14: tmp3
6463 * r15: tmp4
6464 * rbx: tmp5
6465 *
6466 */
6467 void MacroAssembler::multiply_to_len(Register x, Register xlen, Register y, Register ylen, Register z, Register tmp0,
6468 Register tmp1, Register tmp2, Register tmp3, Register tmp4, Register tmp5) {
6469 ShortBranchVerifier sbv(this);
6470 assert_different_registers(x, xlen, y, ylen, z, tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, rdx);
6471
6472 push(tmp0);
6473 push(tmp1);
6474 push(tmp2);
6475 push(tmp3);
6476 push(tmp4);
6477 push(tmp5);
6478
6479 push(xlen);
6480
6481 const Register idx = tmp1;
6482 const Register kdx = tmp2;
6483 const Register xstart = tmp3;
6484
6485 const Register y_idx = tmp4;
6486 const Register carry = tmp5;
6487 const Register product = xlen;
6488 const Register x_xstart = tmp0;
6489
6490 // First Loop.
6491 //
6492 // final static long LONG_MASK = 0xffffffffL;
6493 // int xstart = xlen - 1;
6494 // int ystart = ylen - 1;
6495 // long carry = 0;
6496 // for (int idx=ystart, kdx=ystart+1+xstart; idx >= 0; idx-, kdx--) {
6497 // long product = (y[idx] & LONG_MASK) * (x[xstart] & LONG_MASK) + carry;
6498 // z[kdx] = (int)product;
6499 // carry = product >>> 32;
6500 // }
6501 // z[xstart] = (int)carry;
6502 //
6503
6504 movl(idx, ylen); // idx = ylen;
6505 lea(kdx, Address(xlen, ylen)); // kdx = xlen+ylen;
6506 xorq(carry, carry); // carry = 0;
6507
6508 Label L_done;
6509
6510 movl(xstart, xlen);
6511 decrementl(xstart);
6512 jcc(Assembler::negative, L_done);
6513
6514 multiply_64_x_64_loop(x, xstart, x_xstart, y, y_idx, z, carry, product, idx, kdx);
6515
6516 Label L_second_loop;
6517 testl(kdx, kdx);
6518 jcc(Assembler::zero, L_second_loop);
6519
6520 Label L_carry;
6521 subl(kdx, 1);
6522 jcc(Assembler::zero, L_carry);
6523
6524 movl(Address(z, kdx, Address::times_4, 0), carry);
6525 shrq(carry, 32);
6526 subl(kdx, 1);
6527
6528 bind(L_carry);
6529 movl(Address(z, kdx, Address::times_4, 0), carry);
6530
6531 // Second and third (nested) loops.
6532 //
6533 // for (int i = xstart-1; i >= 0; i--) { // Second loop
6534 // carry = 0;
6535 // for (int jdx=ystart, k=ystart+1+i; jdx >= 0; jdx--, k--) { // Third loop
6536 // long product = (y[jdx] & LONG_MASK) * (x[i] & LONG_MASK) +
6537 // (z[k] & LONG_MASK) + carry;
6538 // z[k] = (int)product;
6539 // carry = product >>> 32;
6540 // }
6541 // z[i] = (int)carry;
6542 // }
6543 //
6544 // i = xlen, j = tmp1, k = tmp2, carry = tmp5, x[i] = rdx
6545
6546 const Register jdx = tmp1;
6547
6548 bind(L_second_loop);
6549 xorl(carry, carry); // carry = 0;
6550 movl(jdx, ylen); // j = ystart+1
6551
6552 subl(xstart, 1); // i = xstart-1;
6553 jcc(Assembler::negative, L_done);
6554
6555 push (z);
6556
6557 Label L_last_x;
6558 lea(z, Address(z, xstart, Address::times_4, 4)); // z = z + k - j
6559 subl(xstart, 1); // i = xstart-1;
6560 jcc(Assembler::negative, L_last_x);
6561
6562 if (UseBMI2Instructions) {
6563 movq(rdx, Address(x, xstart, Address::times_4, 0));
6564 rorxq(rdx, rdx, 32); // convert big-endian to little-endian
6565 } else {
6566 movq(x_xstart, Address(x, xstart, Address::times_4, 0));
6567 rorq(x_xstart, 32); // convert big-endian to little-endian
6568 }
6569
6570 Label L_third_loop_prologue;
6571 bind(L_third_loop_prologue);
6572
6573 push (x);
6574 push (xstart);
6575 push (ylen);
6576
6577
6578 if (UseBMI2Instructions) {
6579 multiply_128_x_128_bmi2_loop(y, z, carry, x, jdx, ylen, product, tmp2, x_xstart, tmp3, tmp4);
6580 } else { // !UseBMI2Instructions
6581 multiply_128_x_128_loop(x_xstart, y, z, y_idx, jdx, ylen, carry, product, x);
6582 }
6583
6584 pop(ylen);
6585 pop(xlen);
6586 pop(x);
6587 pop(z);
6588
6589 movl(tmp3, xlen);
6590 addl(tmp3, 1);
6591 movl(Address(z, tmp3, Address::times_4, 0), carry);
6592 subl(tmp3, 1);
6593 jccb(Assembler::negative, L_done);
6594
6595 shrq(carry, 32);
6596 movl(Address(z, tmp3, Address::times_4, 0), carry);
6597 jmp(L_second_loop);
6598
6599 // Next infrequent code is moved outside loops.
6600 bind(L_last_x);
6601 if (UseBMI2Instructions) {
6602 movl(rdx, Address(x, 0));
6603 } else {
6604 movl(x_xstart, Address(x, 0));
6605 }
6606 jmp(L_third_loop_prologue);
6607
6608 bind(L_done);
6609
6610 pop(xlen);
6611
6612 pop(tmp5);
6613 pop(tmp4);
6614 pop(tmp3);
6615 pop(tmp2);
6616 pop(tmp1);
6617 pop(tmp0);
6618 }
6619
6620 void MacroAssembler::vectorized_mismatch(Register obja, Register objb, Register length, Register log2_array_indxscale,
6621 Register result, Register tmp1, Register tmp2, XMMRegister rymm0, XMMRegister rymm1, XMMRegister rymm2){
6622 assert(UseSSE42Intrinsics, "SSE4.2 must be enabled.");
6623 Label VECTOR16_LOOP, VECTOR8_LOOP, VECTOR4_LOOP;
6624 Label VECTOR8_TAIL, VECTOR4_TAIL;
6625 Label VECTOR32_NOT_EQUAL, VECTOR16_NOT_EQUAL, VECTOR8_NOT_EQUAL, VECTOR4_NOT_EQUAL;
6626 Label SAME_TILL_END, DONE;
6627 Label BYTES_LOOP, BYTES_TAIL, BYTES_NOT_EQUAL;
6628
6629 //scale is in rcx in both Win64 and Unix
6630 ShortBranchVerifier sbv(this);
6631
6632 shlq(length);
6633 xorq(result, result);
6634
6635 if ((AVX3Threshold == 0) && (UseAVX > 2) &&
6636 VM_Version::supports_avx512vlbw()) {
6637 Label VECTOR64_LOOP, VECTOR64_NOT_EQUAL, VECTOR32_TAIL;
6638
6639 cmpq(length, 64);
6640 jcc(Assembler::less, VECTOR32_TAIL);
6641
6642 movq(tmp1, length);
6643 andq(tmp1, 0x3F); // tail count
6644 andq(length, ~(0x3F)); //vector count
6645
6646 bind(VECTOR64_LOOP);
6647 // AVX512 code to compare 64 byte vectors.
6648 evmovdqub(rymm0, Address(obja, result), Assembler::AVX_512bit);
6649 evpcmpeqb(k7, rymm0, Address(objb, result), Assembler::AVX_512bit);
6650 kortestql(k7, k7);
6651 jcc(Assembler::aboveEqual, VECTOR64_NOT_EQUAL); // mismatch
6652 addq(result, 64);
6653 subq(length, 64);
6654 jccb(Assembler::notZero, VECTOR64_LOOP);
6655
6656 //bind(VECTOR64_TAIL);
6657 testq(tmp1, tmp1);
6658 jcc(Assembler::zero, SAME_TILL_END);
6659
6660 //bind(VECTOR64_TAIL);
6661 // AVX512 code to compare up to 63 byte vectors.
6662 mov64(tmp2, 0xFFFFFFFFFFFFFFFF);
6663 shlxq(tmp2, tmp2, tmp1);
6664 notq(tmp2);
6665 kmovql(k3, tmp2);
6666
6667 evmovdqub(rymm0, k3, Address(obja, result), false, Assembler::AVX_512bit);
6668 evpcmpeqb(k7, k3, rymm0, Address(objb, result), Assembler::AVX_512bit);
6669
6670 ktestql(k7, k3);
6671 jcc(Assembler::below, SAME_TILL_END); // not mismatch
6672
6673 bind(VECTOR64_NOT_EQUAL);
6674 kmovql(tmp1, k7);
6675 notq(tmp1);
6676 tzcntq(tmp1, tmp1);
6677 addq(result, tmp1);
6678 shrq(result);
6679 jmp(DONE);
6680 bind(VECTOR32_TAIL);
6681 }
6682
6683 cmpq(length, 8);
6684 jcc(Assembler::equal, VECTOR8_LOOP);
6685 jcc(Assembler::less, VECTOR4_TAIL);
6686
6687 if (UseAVX >= 2) {
6688 Label VECTOR16_TAIL, VECTOR32_LOOP;
6689
6690 cmpq(length, 16);
6691 jcc(Assembler::equal, VECTOR16_LOOP);
6692 jcc(Assembler::less, VECTOR8_LOOP);
6693
6694 cmpq(length, 32);
6695 jccb(Assembler::less, VECTOR16_TAIL);
6696
6697 subq(length, 32);
6698 bind(VECTOR32_LOOP);
6699 vmovdqu(rymm0, Address(obja, result));
6700 vmovdqu(rymm1, Address(objb, result));
6701 vpxor(rymm2, rymm0, rymm1, Assembler::AVX_256bit);
6702 vptest(rymm2, rymm2);
6703 jcc(Assembler::notZero, VECTOR32_NOT_EQUAL);//mismatch found
6704 addq(result, 32);
6705 subq(length, 32);
6706 jcc(Assembler::greaterEqual, VECTOR32_LOOP);
6707 addq(length, 32);
6708 jcc(Assembler::equal, SAME_TILL_END);
6709 //falling through if less than 32 bytes left //close the branch here.
6710
6711 bind(VECTOR16_TAIL);
6712 cmpq(length, 16);
6713 jccb(Assembler::less, VECTOR8_TAIL);
6714 bind(VECTOR16_LOOP);
6715 movdqu(rymm0, Address(obja, result));
6716 movdqu(rymm1, Address(objb, result));
6717 vpxor(rymm2, rymm0, rymm1, Assembler::AVX_128bit);
6718 ptest(rymm2, rymm2);
6719 jcc(Assembler::notZero, VECTOR16_NOT_EQUAL);//mismatch found
6720 addq(result, 16);
6721 subq(length, 16);
6722 jcc(Assembler::equal, SAME_TILL_END);
6723 //falling through if less than 16 bytes left
6724 } else {//regular intrinsics
6725
6726 cmpq(length, 16);
6727 jccb(Assembler::less, VECTOR8_TAIL);
6728
6729 subq(length, 16);
6730 bind(VECTOR16_LOOP);
6731 movdqu(rymm0, Address(obja, result));
6732 movdqu(rymm1, Address(objb, result));
6733 pxor(rymm0, rymm1);
6734 ptest(rymm0, rymm0);
6735 jcc(Assembler::notZero, VECTOR16_NOT_EQUAL);//mismatch found
6736 addq(result, 16);
6737 subq(length, 16);
6738 jccb(Assembler::greaterEqual, VECTOR16_LOOP);
6739 addq(length, 16);
6740 jcc(Assembler::equal, SAME_TILL_END);
6741 //falling through if less than 16 bytes left
6742 }
6743
6744 bind(VECTOR8_TAIL);
6745 cmpq(length, 8);
6746 jccb(Assembler::less, VECTOR4_TAIL);
6747 bind(VECTOR8_LOOP);
6748 movq(tmp1, Address(obja, result));
6749 movq(tmp2, Address(objb, result));
6750 xorq(tmp1, tmp2);
6751 testq(tmp1, tmp1);
6752 jcc(Assembler::notZero, VECTOR8_NOT_EQUAL);//mismatch found
6753 addq(result, 8);
6754 subq(length, 8);
6755 jcc(Assembler::equal, SAME_TILL_END);
6756 //falling through if less than 8 bytes left
6757
6758 bind(VECTOR4_TAIL);
6759 cmpq(length, 4);
6760 jccb(Assembler::less, BYTES_TAIL);
6761 bind(VECTOR4_LOOP);
6762 movl(tmp1, Address(obja, result));
6763 xorl(tmp1, Address(objb, result));
6764 testl(tmp1, tmp1);
6765 jcc(Assembler::notZero, VECTOR4_NOT_EQUAL);//mismatch found
6766 addq(result, 4);
6767 subq(length, 4);
6768 jcc(Assembler::equal, SAME_TILL_END);
6769 //falling through if less than 4 bytes left
6770
6771 bind(BYTES_TAIL);
6772 bind(BYTES_LOOP);
6773 load_unsigned_byte(tmp1, Address(obja, result));
6774 load_unsigned_byte(tmp2, Address(objb, result));
6775 xorl(tmp1, tmp2);
6776 testl(tmp1, tmp1);
6777 jcc(Assembler::notZero, BYTES_NOT_EQUAL);//mismatch found
6778 decq(length);
6779 jcc(Assembler::zero, SAME_TILL_END);
6780 incq(result);
6781 load_unsigned_byte(tmp1, Address(obja, result));
6782 load_unsigned_byte(tmp2, Address(objb, result));
6783 xorl(tmp1, tmp2);
6784 testl(tmp1, tmp1);
6785 jcc(Assembler::notZero, BYTES_NOT_EQUAL);//mismatch found
6786 decq(length);
6787 jcc(Assembler::zero, SAME_TILL_END);
6788 incq(result);
6789 load_unsigned_byte(tmp1, Address(obja, result));
6790 load_unsigned_byte(tmp2, Address(objb, result));
6791 xorl(tmp1, tmp2);
6792 testl(tmp1, tmp1);
6793 jcc(Assembler::notZero, BYTES_NOT_EQUAL);//mismatch found
6794 jmp(SAME_TILL_END);
6795
6796 if (UseAVX >= 2) {
6797 bind(VECTOR32_NOT_EQUAL);
6798 vpcmpeqb(rymm2, rymm2, rymm2, Assembler::AVX_256bit);
6799 vpcmpeqb(rymm0, rymm0, rymm1, Assembler::AVX_256bit);
6800 vpxor(rymm0, rymm0, rymm2, Assembler::AVX_256bit);
6801 vpmovmskb(tmp1, rymm0);
6802 bsfq(tmp1, tmp1);
6803 addq(result, tmp1);
6804 shrq(result);
6805 jmp(DONE);
6806 }
6807
6808 bind(VECTOR16_NOT_EQUAL);
6809 if (UseAVX >= 2) {
6810 vpcmpeqb(rymm2, rymm2, rymm2, Assembler::AVX_128bit);
6811 vpcmpeqb(rymm0, rymm0, rymm1, Assembler::AVX_128bit);
6812 pxor(rymm0, rymm2);
6813 } else {
6814 pcmpeqb(rymm2, rymm2);
6815 pxor(rymm0, rymm1);
6816 pcmpeqb(rymm0, rymm1);
6817 pxor(rymm0, rymm2);
6818 }
6819 pmovmskb(tmp1, rymm0);
6820 bsfq(tmp1, tmp1);
6821 addq(result, tmp1);
6822 shrq(result);
6823 jmpb(DONE);
6824
6825 bind(VECTOR8_NOT_EQUAL);
6826 bind(VECTOR4_NOT_EQUAL);
6827 bsfq(tmp1, tmp1);
6828 shrq(tmp1, 3);
6829 addq(result, tmp1);
6830 bind(BYTES_NOT_EQUAL);
6831 shrq(result);
6832 jmpb(DONE);
6833
6834 bind(SAME_TILL_END);
6835 mov64(result, -1);
6836
6837 bind(DONE);
6838 }
6839
6840 //Helper functions for square_to_len()
6841
6842 /**
6843 * Store the squares of x[], right shifted one bit (divided by 2) into z[]
6844 * Preserves x and z and modifies rest of the registers.
6845 */
6846 void MacroAssembler::square_rshift(Register x, Register xlen, Register z, Register tmp1, Register tmp3, Register tmp4, Register tmp5, Register rdxReg, Register raxReg) {
6847 // Perform square and right shift by 1
6848 // Handle odd xlen case first, then for even xlen do the following
6849 // jlong carry = 0;
6850 // for (int j=0, i=0; j < xlen; j+=2, i+=4) {
6851 // huge_128 product = x[j:j+1] * x[j:j+1];
6852 // z[i:i+1] = (carry << 63) | (jlong)(product >>> 65);
6853 // z[i+2:i+3] = (jlong)(product >>> 1);
6854 // carry = (jlong)product;
6855 // }
6856
6857 xorq(tmp5, tmp5); // carry
6858 xorq(rdxReg, rdxReg);
6859 xorl(tmp1, tmp1); // index for x
6860 xorl(tmp4, tmp4); // index for z
6861
6862 Label L_first_loop, L_first_loop_exit;
6863
6864 testl(xlen, 1);
6865 jccb(Assembler::zero, L_first_loop); //jump if xlen is even
6866
6867 // Square and right shift by 1 the odd element using 32 bit multiply
6868 movl(raxReg, Address(x, tmp1, Address::times_4, 0));
6869 imulq(raxReg, raxReg);
6870 shrq(raxReg, 1);
6871 adcq(tmp5, 0);
6872 movq(Address(z, tmp4, Address::times_4, 0), raxReg);
6873 incrementl(tmp1);
6874 addl(tmp4, 2);
6875
6876 // Square and right shift by 1 the rest using 64 bit multiply
6877 bind(L_first_loop);
6878 cmpptr(tmp1, xlen);
6879 jccb(Assembler::equal, L_first_loop_exit);
6880
6881 // Square
6882 movq(raxReg, Address(x, tmp1, Address::times_4, 0));
6883 rorq(raxReg, 32); // convert big-endian to little-endian
6884 mulq(raxReg); // 64-bit multiply rax * rax -> rdx:rax
6885
6886 // Right shift by 1 and save carry
6887 shrq(tmp5, 1); // rdx:rax:tmp5 = (tmp5:rdx:rax) >>> 1
6888 rcrq(rdxReg, 1);
6889 rcrq(raxReg, 1);
6890 adcq(tmp5, 0);
6891
6892 // Store result in z
6893 movq(Address(z, tmp4, Address::times_4, 0), rdxReg);
6894 movq(Address(z, tmp4, Address::times_4, 8), raxReg);
6895
6896 // Update indices for x and z
6897 addl(tmp1, 2);
6898 addl(tmp4, 4);
6899 jmp(L_first_loop);
6900
6901 bind(L_first_loop_exit);
6902 }
6903
6904
6905 /**
6906 * Perform the following multiply add operation using BMI2 instructions
6907 * carry:sum = sum + op1*op2 + carry
6908 * op2 should be in rdx
6909 * op2 is preserved, all other registers are modified
6910 */
6911 void MacroAssembler::multiply_add_64_bmi2(Register sum, Register op1, Register op2, Register carry, Register tmp2) {
6912 // assert op2 is rdx
6913 mulxq(tmp2, op1, op1); // op1 * op2 -> tmp2:op1
6914 addq(sum, carry);
6915 adcq(tmp2, 0);
6916 addq(sum, op1);
6917 adcq(tmp2, 0);
6918 movq(carry, tmp2);
6919 }
6920
6921 /**
6922 * Perform the following multiply add operation:
6923 * carry:sum = sum + op1*op2 + carry
6924 * Preserves op1, op2 and modifies rest of registers
6925 */
6926 void MacroAssembler::multiply_add_64(Register sum, Register op1, Register op2, Register carry, Register rdxReg, Register raxReg) {
6927 // rdx:rax = op1 * op2
6928 movq(raxReg, op2);
6929 mulq(op1);
6930
6931 // rdx:rax = sum + carry + rdx:rax
6932 addq(sum, carry);
6933 adcq(rdxReg, 0);
6934 addq(sum, raxReg);
6935 adcq(rdxReg, 0);
6936
6937 // carry:sum = rdx:sum
6938 movq(carry, rdxReg);
6939 }
6940
6941 /**
6942 * Add 64 bit long carry into z[] with carry propagation.
6943 * Preserves z and carry register values and modifies rest of registers.
6944 *
6945 */
6946 void MacroAssembler::add_one_64(Register z, Register zlen, Register carry, Register tmp1) {
6947 Label L_fourth_loop, L_fourth_loop_exit;
6948
6949 movl(tmp1, 1);
6950 subl(zlen, 2);
6951 addq(Address(z, zlen, Address::times_4, 0), carry);
6952
6953 bind(L_fourth_loop);
6954 jccb(Assembler::carryClear, L_fourth_loop_exit);
6955 subl(zlen, 2);
6956 jccb(Assembler::negative, L_fourth_loop_exit);
6957 addq(Address(z, zlen, Address::times_4, 0), tmp1);
6958 jmp(L_fourth_loop);
6959 bind(L_fourth_loop_exit);
6960 }
6961
6962 /**
6963 * Shift z[] left by 1 bit.
6964 * Preserves x, len, z and zlen registers and modifies rest of the registers.
6965 *
6966 */
6967 void MacroAssembler::lshift_by_1(Register x, Register len, Register z, Register zlen, Register tmp1, Register tmp2, Register tmp3, Register tmp4) {
6968
6969 Label L_fifth_loop, L_fifth_loop_exit;
6970
6971 // Fifth loop
6972 // Perform primitiveLeftShift(z, zlen, 1)
6973
6974 const Register prev_carry = tmp1;
6975 const Register new_carry = tmp4;
6976 const Register value = tmp2;
6977 const Register zidx = tmp3;
6978
6979 // int zidx, carry;
6980 // long value;
6981 // carry = 0;
6982 // for (zidx = zlen-2; zidx >=0; zidx -= 2) {
6983 // (carry:value) = (z[i] << 1) | carry ;
6984 // z[i] = value;
6985 // }
6986
6987 movl(zidx, zlen);
6988 xorl(prev_carry, prev_carry); // clear carry flag and prev_carry register
6989
6990 bind(L_fifth_loop);
6991 decl(zidx); // Use decl to preserve carry flag
6992 decl(zidx);
6993 jccb(Assembler::negative, L_fifth_loop_exit);
6994
6995 if (UseBMI2Instructions) {
6996 movq(value, Address(z, zidx, Address::times_4, 0));
6997 rclq(value, 1);
6998 rorxq(value, value, 32);
6999 movq(Address(z, zidx, Address::times_4, 0), value); // Store back in big endian form
7000 }
7001 else {
7002 // clear new_carry
7003 xorl(new_carry, new_carry);
7004
7005 // Shift z[i] by 1, or in previous carry and save new carry
7006 movq(value, Address(z, zidx, Address::times_4, 0));
7007 shlq(value, 1);
7008 adcl(new_carry, 0);
7009
7010 orq(value, prev_carry);
7011 rorq(value, 0x20);
7012 movq(Address(z, zidx, Address::times_4, 0), value); // Store back in big endian form
7013
7014 // Set previous carry = new carry
7015 movl(prev_carry, new_carry);
7016 }
7017 jmp(L_fifth_loop);
7018
7019 bind(L_fifth_loop_exit);
7020 }
7021
7022
7023 /**
7024 * Code for BigInteger::squareToLen() intrinsic
7025 *
7026 * rdi: x
7027 * rsi: len
7028 * r8: z
7029 * rcx: zlen
7030 * r12: tmp1
7031 * r13: tmp2
7032 * r14: tmp3
7033 * r15: tmp4
7034 * rbx: tmp5
7035 *
7036 */
7037 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) {
7038
7039 Label L_second_loop, L_second_loop_exit, L_third_loop, L_third_loop_exit, L_last_x, L_multiply;
7040 push(tmp1);
7041 push(tmp2);
7042 push(tmp3);
7043 push(tmp4);
7044 push(tmp5);
7045
7046 // First loop
7047 // Store the squares, right shifted one bit (i.e., divided by 2).
7048 square_rshift(x, len, z, tmp1, tmp3, tmp4, tmp5, rdxReg, raxReg);
7049
7050 // Add in off-diagonal sums.
7051 //
7052 // Second, third (nested) and fourth loops.
7053 // zlen +=2;
7054 // for (int xidx=len-2,zidx=zlen-4; xidx > 0; xidx-=2,zidx-=4) {
7055 // carry = 0;
7056 // long op2 = x[xidx:xidx+1];
7057 // for (int j=xidx-2,k=zidx; j >= 0; j-=2) {
7058 // k -= 2;
7059 // long op1 = x[j:j+1];
7060 // long sum = z[k:k+1];
7061 // carry:sum = multiply_add_64(sum, op1, op2, carry, tmp_regs);
7062 // z[k:k+1] = sum;
7063 // }
7064 // add_one_64(z, k, carry, tmp_regs);
7065 // }
7066
7067 const Register carry = tmp5;
7068 const Register sum = tmp3;
7069 const Register op1 = tmp4;
7070 Register op2 = tmp2;
7071
7072 push(zlen);
7073 push(len);
7074 addl(zlen,2);
7075 bind(L_second_loop);
7076 xorq(carry, carry);
7077 subl(zlen, 4);
7078 subl(len, 2);
7079 push(zlen);
7080 push(len);
7081 cmpl(len, 0);
7082 jccb(Assembler::lessEqual, L_second_loop_exit);
7083
7084 // Multiply an array by one 64 bit long.
7085 if (UseBMI2Instructions) {
7086 op2 = rdxReg;
7087 movq(op2, Address(x, len, Address::times_4, 0));
7088 rorxq(op2, op2, 32);
7089 }
7090 else {
7091 movq(op2, Address(x, len, Address::times_4, 0));
7092 rorq(op2, 32);
7093 }
7094
7095 bind(L_third_loop);
7096 decrementl(len);
7097 jccb(Assembler::negative, L_third_loop_exit);
7098 decrementl(len);
7099 jccb(Assembler::negative, L_last_x);
7100
7101 movq(op1, Address(x, len, Address::times_4, 0));
7102 rorq(op1, 32);
7103
7104 bind(L_multiply);
7105 subl(zlen, 2);
7106 movq(sum, Address(z, zlen, Address::times_4, 0));
7107
7108 // Multiply 64 bit by 64 bit and add 64 bits lower half and upper 64 bits as carry.
7109 if (UseBMI2Instructions) {
7110 multiply_add_64_bmi2(sum, op1, op2, carry, tmp2);
7111 }
7112 else {
7113 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg);
7114 }
7115
7116 movq(Address(z, zlen, Address::times_4, 0), sum);
7117
7118 jmp(L_third_loop);
7119 bind(L_third_loop_exit);
7120
7121 // Fourth loop
7122 // Add 64 bit long carry into z with carry propagation.
7123 // Uses offsetted zlen.
7124 add_one_64(z, zlen, carry, tmp1);
7125
7126 pop(len);
7127 pop(zlen);
7128 jmp(L_second_loop);
7129
7130 // Next infrequent code is moved outside loops.
7131 bind(L_last_x);
7132 movl(op1, Address(x, 0));
7133 jmp(L_multiply);
7134
7135 bind(L_second_loop_exit);
7136 pop(len);
7137 pop(zlen);
7138 pop(len);
7139 pop(zlen);
7140
7141 // Fifth loop
7142 // Shift z left 1 bit.
7143 lshift_by_1(x, len, z, zlen, tmp1, tmp2, tmp3, tmp4);
7144
7145 // z[zlen-1] |= x[len-1] & 1;
7146 movl(tmp3, Address(x, len, Address::times_4, -4));
7147 andl(tmp3, 1);
7148 orl(Address(z, zlen, Address::times_4, -4), tmp3);
7149
7150 pop(tmp5);
7151 pop(tmp4);
7152 pop(tmp3);
7153 pop(tmp2);
7154 pop(tmp1);
7155 }
7156
7157 /**
7158 * Helper function for mul_add()
7159 * Multiply the in[] by int k and add to out[] starting at offset offs using
7160 * 128 bit by 32 bit multiply and return the carry in tmp5.
7161 * Only quad int aligned length of in[] is operated on in this function.
7162 * k is in rdxReg for BMI2Instructions, for others it is in tmp2.
7163 * This function preserves out, in and k registers.
7164 * len and offset point to the appropriate index in "in" & "out" correspondingly
7165 * tmp5 has the carry.
7166 * other registers are temporary and are modified.
7167 *
7168 */
7169 void MacroAssembler::mul_add_128_x_32_loop(Register out, Register in,
7170 Register offset, Register len, Register tmp1, Register tmp2, Register tmp3,
7171 Register tmp4, Register tmp5, Register rdxReg, Register raxReg) {
7172
7173 Label L_first_loop, L_first_loop_exit;
7174
7175 movl(tmp1, len);
7176 shrl(tmp1, 2);
7177
7178 bind(L_first_loop);
7179 subl(tmp1, 1);
7180 jccb(Assembler::negative, L_first_loop_exit);
7181
7182 subl(len, 4);
7183 subl(offset, 4);
7184
7185 Register op2 = tmp2;
7186 const Register sum = tmp3;
7187 const Register op1 = tmp4;
7188 const Register carry = tmp5;
7189
7190 if (UseBMI2Instructions) {
7191 op2 = rdxReg;
7192 }
7193
7194 movq(op1, Address(in, len, Address::times_4, 8));
7195 rorq(op1, 32);
7196 movq(sum, Address(out, offset, Address::times_4, 8));
7197 rorq(sum, 32);
7198 if (UseBMI2Instructions) {
7199 multiply_add_64_bmi2(sum, op1, op2, carry, raxReg);
7200 }
7201 else {
7202 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg);
7203 }
7204 // Store back in big endian from little endian
7205 rorq(sum, 0x20);
7206 movq(Address(out, offset, Address::times_4, 8), sum);
7207
7208 movq(op1, Address(in, len, Address::times_4, 0));
7209 rorq(op1, 32);
7210 movq(sum, Address(out, offset, Address::times_4, 0));
7211 rorq(sum, 32);
7212 if (UseBMI2Instructions) {
7213 multiply_add_64_bmi2(sum, op1, op2, carry, raxReg);
7214 }
7215 else {
7216 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg);
7217 }
7218 // Store back in big endian from little endian
7219 rorq(sum, 0x20);
7220 movq(Address(out, offset, Address::times_4, 0), sum);
7221
7222 jmp(L_first_loop);
7223 bind(L_first_loop_exit);
7224 }
7225
7226 /**
7227 * Code for BigInteger::mulAdd() intrinsic
7228 *
7229 * rdi: out
7230 * rsi: in
7231 * r11: offs (out.length - offset)
7232 * rcx: len
7233 * r8: k
7234 * r12: tmp1
7235 * r13: tmp2
7236 * r14: tmp3
7237 * r15: tmp4
7238 * rbx: tmp5
7239 * Multiply the in[] by word k and add to out[], return the carry in rax
7240 */
7241 void MacroAssembler::mul_add(Register out, Register in, Register offs,
7242 Register len, Register k, Register tmp1, Register tmp2, Register tmp3,
7243 Register tmp4, Register tmp5, Register rdxReg, Register raxReg) {
7244
7245 Label L_carry, L_last_in, L_done;
7246
7247 // carry = 0;
7248 // for (int j=len-1; j >= 0; j--) {
7249 // long product = (in[j] & LONG_MASK) * kLong +
7250 // (out[offs] & LONG_MASK) + carry;
7251 // out[offs--] = (int)product;
7252 // carry = product >>> 32;
7253 // }
7254 //
7255 push(tmp1);
7256 push(tmp2);
7257 push(tmp3);
7258 push(tmp4);
7259 push(tmp5);
7260
7261 Register op2 = tmp2;
7262 const Register sum = tmp3;
7263 const Register op1 = tmp4;
7264 const Register carry = tmp5;
7265
7266 if (UseBMI2Instructions) {
7267 op2 = rdxReg;
7268 movl(op2, k);
7269 }
7270 else {
7271 movl(op2, k);
7272 }
7273
7274 xorq(carry, carry);
7275
7276 //First loop
7277
7278 //Multiply in[] by k in a 4 way unrolled loop using 128 bit by 32 bit multiply
7279 //The carry is in tmp5
7280 mul_add_128_x_32_loop(out, in, offs, len, tmp1, tmp2, tmp3, tmp4, tmp5, rdxReg, raxReg);
7281
7282 //Multiply the trailing in[] entry using 64 bit by 32 bit, if any
7283 decrementl(len);
7284 jccb(Assembler::negative, L_carry);
7285 decrementl(len);
7286 jccb(Assembler::negative, L_last_in);
7287
7288 movq(op1, Address(in, len, Address::times_4, 0));
7289 rorq(op1, 32);
7290
7291 subl(offs, 2);
7292 movq(sum, Address(out, offs, Address::times_4, 0));
7293 rorq(sum, 32);
7294
7295 if (UseBMI2Instructions) {
7296 multiply_add_64_bmi2(sum, op1, op2, carry, raxReg);
7297 }
7298 else {
7299 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg);
7300 }
7301
7302 // Store back in big endian from little endian
7303 rorq(sum, 0x20);
7304 movq(Address(out, offs, Address::times_4, 0), sum);
7305
7306 testl(len, len);
7307 jccb(Assembler::zero, L_carry);
7308
7309 //Multiply the last in[] entry, if any
7310 bind(L_last_in);
7311 movl(op1, Address(in, 0));
7312 movl(sum, Address(out, offs, Address::times_4, -4));
7313
7314 movl(raxReg, k);
7315 mull(op1); //tmp4 * eax -> edx:eax
7316 addl(sum, carry);
7317 adcl(rdxReg, 0);
7318 addl(sum, raxReg);
7319 adcl(rdxReg, 0);
7320 movl(carry, rdxReg);
7321
7322 movl(Address(out, offs, Address::times_4, -4), sum);
7323
7324 bind(L_carry);
7325 //return tmp5/carry as carry in rax
7326 movl(rax, carry);
7327
7328 bind(L_done);
7329 pop(tmp5);
7330 pop(tmp4);
7331 pop(tmp3);
7332 pop(tmp2);
7333 pop(tmp1);
7334 }
7335
7336 /**
7337 * Emits code to update CRC-32 with a byte value according to constants in table
7338 *
7339 * @param [in,out]crc Register containing the crc.
7340 * @param [in]val Register containing the byte to fold into the CRC.
7341 * @param [in]table Register containing the table of crc constants.
7342 *
7343 * uint32_t crc;
7344 * val = crc_table[(val ^ crc) & 0xFF];
7345 * crc = val ^ (crc >> 8);
7346 *
7347 */
7348 void MacroAssembler::update_byte_crc32(Register crc, Register val, Register table) {
7349 xorl(val, crc);
7350 andl(val, 0xFF);
7351 shrl(crc, 8); // unsigned shift
7352 xorl(crc, Address(table, val, Address::times_4, 0));
7353 }
7354
7355 /**
7356 * Fold 128-bit data chunk
7357 */
7358 void MacroAssembler::fold_128bit_crc32(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, Register buf, int offset) {
7359 if (UseAVX > 0) {
7360 vpclmulhdq(xtmp, xK, xcrc); // [123:64]
7361 vpclmulldq(xcrc, xK, xcrc); // [63:0]
7362 vpxor(xcrc, xcrc, Address(buf, offset), 0 /* vector_len */);
7363 pxor(xcrc, xtmp);
7364 } else {
7365 movdqa(xtmp, xcrc);
7366 pclmulhdq(xtmp, xK); // [123:64]
7367 pclmulldq(xcrc, xK); // [63:0]
7368 pxor(xcrc, xtmp);
7369 movdqu(xtmp, Address(buf, offset));
7370 pxor(xcrc, xtmp);
7371 }
7372 }
7373
7374 void MacroAssembler::fold_128bit_crc32(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, XMMRegister xbuf) {
7375 if (UseAVX > 0) {
7376 vpclmulhdq(xtmp, xK, xcrc);
7377 vpclmulldq(xcrc, xK, xcrc);
7378 pxor(xcrc, xbuf);
7379 pxor(xcrc, xtmp);
7380 } else {
7381 movdqa(xtmp, xcrc);
7382 pclmulhdq(xtmp, xK);
7383 pclmulldq(xcrc, xK);
7384 pxor(xcrc, xbuf);
7385 pxor(xcrc, xtmp);
7386 }
7387 }
7388
7389 /**
7390 * 8-bit folds to compute 32-bit CRC
7391 *
7392 * uint64_t xcrc;
7393 * timesXtoThe32[xcrc & 0xFF] ^ (xcrc >> 8);
7394 */
7395 void MacroAssembler::fold_8bit_crc32(XMMRegister xcrc, Register table, XMMRegister xtmp, Register tmp) {
7396 movdl(tmp, xcrc);
7397 andl(tmp, 0xFF);
7398 movdl(xtmp, Address(table, tmp, Address::times_4, 0));
7399 psrldq(xcrc, 1); // unsigned shift one byte
7400 pxor(xcrc, xtmp);
7401 }
7402
7403 /**
7404 * uint32_t crc;
7405 * timesXtoThe32[crc & 0xFF] ^ (crc >> 8);
7406 */
7407 void MacroAssembler::fold_8bit_crc32(Register crc, Register table, Register tmp) {
7408 movl(tmp, crc);
7409 andl(tmp, 0xFF);
7410 shrl(crc, 8);
7411 xorl(crc, Address(table, tmp, Address::times_4, 0));
7412 }
7413
7414 /**
7415 * @param crc register containing existing CRC (32-bit)
7416 * @param buf register pointing to input byte buffer (byte*)
7417 * @param len register containing number of bytes
7418 * @param table register that will contain address of CRC table
7419 * @param tmp scratch register
7420 */
7421 void MacroAssembler::kernel_crc32(Register crc, Register buf, Register len, Register table, Register tmp) {
7422 assert_different_registers(crc, buf, len, table, tmp, rax);
7423
7424 Label L_tail, L_tail_restore, L_tail_loop, L_exit, L_align_loop, L_aligned;
7425 Label L_fold_tail, L_fold_128b, L_fold_512b, L_fold_512b_loop, L_fold_tail_loop;
7426
7427 // For EVEX with VL and BW, provide a standard mask, VL = 128 will guide the merge
7428 // context for the registers used, where all instructions below are using 128-bit mode
7429 // On EVEX without VL and BW, these instructions will all be AVX.
7430 lea(table, ExternalAddress(StubRoutines::crc_table_addr()));
7431 notl(crc); // ~crc
7432 cmpl(len, 16);
7433 jcc(Assembler::less, L_tail);
7434
7435 // Align buffer to 16 bytes
7436 movl(tmp, buf);
7437 andl(tmp, 0xF);
7438 jccb(Assembler::zero, L_aligned);
7439 subl(tmp, 16);
7440 addl(len, tmp);
7441
7442 align(4);
7443 BIND(L_align_loop);
7444 movsbl(rax, Address(buf, 0)); // load byte with sign extension
7445 update_byte_crc32(crc, rax, table);
7446 increment(buf);
7447 incrementl(tmp);
7448 jccb(Assembler::less, L_align_loop);
7449
7450 BIND(L_aligned);
7451 movl(tmp, len); // save
7452 shrl(len, 4);
7453 jcc(Assembler::zero, L_tail_restore);
7454
7455 // Fold crc into first bytes of vector
7456 movdqa(xmm1, Address(buf, 0));
7457 movdl(rax, xmm1);
7458 xorl(crc, rax);
7459 if (VM_Version::supports_sse4_1()) {
7460 pinsrd(xmm1, crc, 0);
7461 } else {
7462 pinsrw(xmm1, crc, 0);
7463 shrl(crc, 16);
7464 pinsrw(xmm1, crc, 1);
7465 }
7466 addptr(buf, 16);
7467 subl(len, 4); // len > 0
7468 jcc(Assembler::less, L_fold_tail);
7469
7470 movdqa(xmm2, Address(buf, 0));
7471 movdqa(xmm3, Address(buf, 16));
7472 movdqa(xmm4, Address(buf, 32));
7473 addptr(buf, 48);
7474 subl(len, 3);
7475 jcc(Assembler::lessEqual, L_fold_512b);
7476
7477 // Fold total 512 bits of polynomial on each iteration,
7478 // 128 bits per each of 4 parallel streams.
7479 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 32), rscratch1);
7480
7481 align32();
7482 BIND(L_fold_512b_loop);
7483 fold_128bit_crc32(xmm1, xmm0, xmm5, buf, 0);
7484 fold_128bit_crc32(xmm2, xmm0, xmm5, buf, 16);
7485 fold_128bit_crc32(xmm3, xmm0, xmm5, buf, 32);
7486 fold_128bit_crc32(xmm4, xmm0, xmm5, buf, 48);
7487 addptr(buf, 64);
7488 subl(len, 4);
7489 jcc(Assembler::greater, L_fold_512b_loop);
7490
7491 // Fold 512 bits to 128 bits.
7492 BIND(L_fold_512b);
7493 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 16), rscratch1);
7494 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm2);
7495 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm3);
7496 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm4);
7497
7498 // Fold the rest of 128 bits data chunks
7499 BIND(L_fold_tail);
7500 addl(len, 3);
7501 jccb(Assembler::lessEqual, L_fold_128b);
7502 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 16), rscratch1);
7503
7504 BIND(L_fold_tail_loop);
7505 fold_128bit_crc32(xmm1, xmm0, xmm5, buf, 0);
7506 addptr(buf, 16);
7507 decrementl(len);
7508 jccb(Assembler::greater, L_fold_tail_loop);
7509
7510 // Fold 128 bits in xmm1 down into 32 bits in crc register.
7511 BIND(L_fold_128b);
7512 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr()), rscratch1);
7513 if (UseAVX > 0) {
7514 vpclmulqdq(xmm2, xmm0, xmm1, 0x1);
7515 vpand(xmm3, xmm0, xmm2, 0 /* vector_len */);
7516 vpclmulqdq(xmm0, xmm0, xmm3, 0x1);
7517 } else {
7518 movdqa(xmm2, xmm0);
7519 pclmulqdq(xmm2, xmm1, 0x1);
7520 movdqa(xmm3, xmm0);
7521 pand(xmm3, xmm2);
7522 pclmulqdq(xmm0, xmm3, 0x1);
7523 }
7524 psrldq(xmm1, 8);
7525 psrldq(xmm2, 4);
7526 pxor(xmm0, xmm1);
7527 pxor(xmm0, xmm2);
7528
7529 // 8 8-bit folds to compute 32-bit CRC.
7530 for (int j = 0; j < 4; j++) {
7531 fold_8bit_crc32(xmm0, table, xmm1, rax);
7532 }
7533 movdl(crc, xmm0); // mov 32 bits to general register
7534 for (int j = 0; j < 4; j++) {
7535 fold_8bit_crc32(crc, table, rax);
7536 }
7537
7538 BIND(L_tail_restore);
7539 movl(len, tmp); // restore
7540 BIND(L_tail);
7541 andl(len, 0xf);
7542 jccb(Assembler::zero, L_exit);
7543
7544 // Fold the rest of bytes
7545 align(4);
7546 BIND(L_tail_loop);
7547 movsbl(rax, Address(buf, 0)); // load byte with sign extension
7548 update_byte_crc32(crc, rax, table);
7549 increment(buf);
7550 decrementl(len);
7551 jccb(Assembler::greater, L_tail_loop);
7552
7553 BIND(L_exit);
7554 notl(crc); // ~c
7555 }
7556
7557 // Helper function for AVX 512 CRC32
7558 // Fold 512-bit data chunks
7559 void MacroAssembler::fold512bit_crc32_avx512(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, Register buf,
7560 Register pos, int offset) {
7561 evmovdquq(xmm3, Address(buf, pos, Address::times_1, offset), Assembler::AVX_512bit);
7562 evpclmulqdq(xtmp, xcrc, xK, 0x10, Assembler::AVX_512bit); // [123:64]
7563 evpclmulqdq(xmm2, xcrc, xK, 0x01, Assembler::AVX_512bit); // [63:0]
7564 evpxorq(xcrc, xtmp, xmm2, Assembler::AVX_512bit /* vector_len */);
7565 evpxorq(xcrc, xcrc, xmm3, Assembler::AVX_512bit /* vector_len */);
7566 }
7567
7568 // Helper function for AVX 512 CRC32
7569 // Compute CRC32 for < 256B buffers
7570 void MacroAssembler::kernel_crc32_avx512_256B(Register crc, Register buf, Register len, Register table, Register pos,
7571 Register tmp1, Register tmp2, Label& L_barrett, Label& L_16B_reduction_loop,
7572 Label& L_get_last_two_xmms, Label& L_128_done, Label& L_cleanup) {
7573
7574 Label L_less_than_32, L_exact_16_left, L_less_than_16_left;
7575 Label L_less_than_8_left, L_less_than_4_left, L_less_than_2_left, L_zero_left;
7576 Label L_only_less_than_4, L_only_less_than_3, L_only_less_than_2;
7577
7578 // check if there is enough buffer to be able to fold 16B at a time
7579 cmpl(len, 32);
7580 jcc(Assembler::less, L_less_than_32);
7581
7582 // if there is, load the constants
7583 movdqu(xmm10, Address(table, 1 * 16)); //rk1 and rk2 in xmm10
7584 movdl(xmm0, crc); // get the initial crc value
7585 movdqu(xmm7, Address(buf, pos, Address::times_1, 0 * 16)); //load the plaintext
7586 pxor(xmm7, xmm0);
7587
7588 // update the buffer pointer
7589 addl(pos, 16);
7590 //update the counter.subtract 32 instead of 16 to save one instruction from the loop
7591 subl(len, 32);
7592 jmp(L_16B_reduction_loop);
7593
7594 bind(L_less_than_32);
7595 //mov initial crc to the return value. this is necessary for zero - length buffers.
7596 movl(rax, crc);
7597 testl(len, len);
7598 jcc(Assembler::equal, L_cleanup);
7599
7600 movdl(xmm0, crc); //get the initial crc value
7601
7602 cmpl(len, 16);
7603 jcc(Assembler::equal, L_exact_16_left);
7604 jcc(Assembler::less, L_less_than_16_left);
7605
7606 movdqu(xmm7, Address(buf, pos, Address::times_1, 0 * 16)); //load the plaintext
7607 pxor(xmm7, xmm0); //xor the initial crc value
7608 addl(pos, 16);
7609 subl(len, 16);
7610 movdqu(xmm10, Address(table, 1 * 16)); // rk1 and rk2 in xmm10
7611 jmp(L_get_last_two_xmms);
7612
7613 bind(L_less_than_16_left);
7614 //use stack space to load data less than 16 bytes, zero - out the 16B in memory first.
7615 pxor(xmm1, xmm1);
7616 movptr(tmp1, rsp);
7617 movdqu(Address(tmp1, 0 * 16), xmm1);
7618
7619 cmpl(len, 4);
7620 jcc(Assembler::less, L_only_less_than_4);
7621
7622 //backup the counter value
7623 movl(tmp2, len);
7624 cmpl(len, 8);
7625 jcc(Assembler::less, L_less_than_8_left);
7626
7627 //load 8 Bytes
7628 movq(rax, Address(buf, pos, Address::times_1, 0 * 16));
7629 movq(Address(tmp1, 0 * 16), rax);
7630 addptr(tmp1, 8);
7631 subl(len, 8);
7632 addl(pos, 8);
7633
7634 bind(L_less_than_8_left);
7635 cmpl(len, 4);
7636 jcc(Assembler::less, L_less_than_4_left);
7637
7638 //load 4 Bytes
7639 movl(rax, Address(buf, pos, Address::times_1, 0));
7640 movl(Address(tmp1, 0 * 16), rax);
7641 addptr(tmp1, 4);
7642 subl(len, 4);
7643 addl(pos, 4);
7644
7645 bind(L_less_than_4_left);
7646 cmpl(len, 2);
7647 jcc(Assembler::less, L_less_than_2_left);
7648
7649 // load 2 Bytes
7650 movw(rax, Address(buf, pos, Address::times_1, 0));
7651 movl(Address(tmp1, 0 * 16), rax);
7652 addptr(tmp1, 2);
7653 subl(len, 2);
7654 addl(pos, 2);
7655
7656 bind(L_less_than_2_left);
7657 cmpl(len, 1);
7658 jcc(Assembler::less, L_zero_left);
7659
7660 // load 1 Byte
7661 movb(rax, Address(buf, pos, Address::times_1, 0));
7662 movb(Address(tmp1, 0 * 16), rax);
7663
7664 bind(L_zero_left);
7665 movdqu(xmm7, Address(rsp, 0));
7666 pxor(xmm7, xmm0); //xor the initial crc value
7667
7668 lea(rax, ExternalAddress(StubRoutines::x86::shuf_table_crc32_avx512_addr()));
7669 movdqu(xmm0, Address(rax, tmp2));
7670 pshufb(xmm7, xmm0);
7671 jmp(L_128_done);
7672
7673 bind(L_exact_16_left);
7674 movdqu(xmm7, Address(buf, pos, Address::times_1, 0));
7675 pxor(xmm7, xmm0); //xor the initial crc value
7676 jmp(L_128_done);
7677
7678 bind(L_only_less_than_4);
7679 cmpl(len, 3);
7680 jcc(Assembler::less, L_only_less_than_3);
7681
7682 // load 3 Bytes
7683 movb(rax, Address(buf, pos, Address::times_1, 0));
7684 movb(Address(tmp1, 0), rax);
7685
7686 movb(rax, Address(buf, pos, Address::times_1, 1));
7687 movb(Address(tmp1, 1), rax);
7688
7689 movb(rax, Address(buf, pos, Address::times_1, 2));
7690 movb(Address(tmp1, 2), rax);
7691
7692 movdqu(xmm7, Address(rsp, 0));
7693 pxor(xmm7, xmm0); //xor the initial crc value
7694
7695 pslldq(xmm7, 0x5);
7696 jmp(L_barrett);
7697 bind(L_only_less_than_3);
7698 cmpl(len, 2);
7699 jcc(Assembler::less, L_only_less_than_2);
7700
7701 // load 2 Bytes
7702 movb(rax, Address(buf, pos, Address::times_1, 0));
7703 movb(Address(tmp1, 0), rax);
7704
7705 movb(rax, Address(buf, pos, Address::times_1, 1));
7706 movb(Address(tmp1, 1), rax);
7707
7708 movdqu(xmm7, Address(rsp, 0));
7709 pxor(xmm7, xmm0); //xor the initial crc value
7710
7711 pslldq(xmm7, 0x6);
7712 jmp(L_barrett);
7713
7714 bind(L_only_less_than_2);
7715 //load 1 Byte
7716 movb(rax, Address(buf, pos, Address::times_1, 0));
7717 movb(Address(tmp1, 0), rax);
7718
7719 movdqu(xmm7, Address(rsp, 0));
7720 pxor(xmm7, xmm0); //xor the initial crc value
7721
7722 pslldq(xmm7, 0x7);
7723 }
7724
7725 /**
7726 * Compute CRC32 using AVX512 instructions
7727 * param crc register containing existing CRC (32-bit)
7728 * param buf register pointing to input byte buffer (byte*)
7729 * param len register containing number of bytes
7730 * param table address of crc or crc32c table
7731 * param tmp1 scratch register
7732 * param tmp2 scratch register
7733 * return rax result register
7734 *
7735 * This routine is identical for crc32c with the exception of the precomputed constant
7736 * table which will be passed as the table argument. The calculation steps are
7737 * the same for both variants.
7738 */
7739 void MacroAssembler::kernel_crc32_avx512(Register crc, Register buf, Register len, Register table, Register tmp1, Register tmp2) {
7740 assert_different_registers(crc, buf, len, table, tmp1, tmp2, rax, r12);
7741
7742 Label L_tail, L_tail_restore, L_tail_loop, L_exit, L_align_loop, L_aligned;
7743 Label L_fold_tail, L_fold_128b, L_fold_512b, L_fold_512b_loop, L_fold_tail_loop;
7744 Label L_less_than_256, L_fold_128_B_loop, L_fold_256_B_loop;
7745 Label L_fold_128_B_register, L_final_reduction_for_128, L_16B_reduction_loop;
7746 Label L_128_done, L_get_last_two_xmms, L_barrett, L_cleanup;
7747
7748 const Register pos = r12;
7749 push(r12);
7750 subptr(rsp, 16 * 2 + 8);
7751
7752 // For EVEX with VL and BW, provide a standard mask, VL = 128 will guide the merge
7753 // context for the registers used, where all instructions below are using 128-bit mode
7754 // On EVEX without VL and BW, these instructions will all be AVX.
7755 movl(pos, 0);
7756
7757 // check if smaller than 256B
7758 cmpl(len, 256);
7759 jcc(Assembler::less, L_less_than_256);
7760
7761 // load the initial crc value
7762 movdl(xmm10, crc);
7763
7764 // receive the initial 64B data, xor the initial crc value
7765 evmovdquq(xmm0, Address(buf, pos, Address::times_1, 0 * 64), Assembler::AVX_512bit);
7766 evmovdquq(xmm4, Address(buf, pos, Address::times_1, 1 * 64), Assembler::AVX_512bit);
7767 evpxorq(xmm0, xmm0, xmm10, Assembler::AVX_512bit);
7768 evbroadcasti32x4(xmm10, Address(table, 2 * 16), Assembler::AVX_512bit); //zmm10 has rk3 and rk4
7769
7770 subl(len, 256);
7771 cmpl(len, 256);
7772 jcc(Assembler::less, L_fold_128_B_loop);
7773
7774 evmovdquq(xmm7, Address(buf, pos, Address::times_1, 2 * 64), Assembler::AVX_512bit);
7775 evmovdquq(xmm8, Address(buf, pos, Address::times_1, 3 * 64), Assembler::AVX_512bit);
7776 evbroadcasti32x4(xmm16, Address(table, 0 * 16), Assembler::AVX_512bit); //zmm16 has rk-1 and rk-2
7777 subl(len, 256);
7778
7779 bind(L_fold_256_B_loop);
7780 addl(pos, 256);
7781 fold512bit_crc32_avx512(xmm0, xmm16, xmm1, buf, pos, 0 * 64);
7782 fold512bit_crc32_avx512(xmm4, xmm16, xmm1, buf, pos, 1 * 64);
7783 fold512bit_crc32_avx512(xmm7, xmm16, xmm1, buf, pos, 2 * 64);
7784 fold512bit_crc32_avx512(xmm8, xmm16, xmm1, buf, pos, 3 * 64);
7785
7786 subl(len, 256);
7787 jcc(Assembler::greaterEqual, L_fold_256_B_loop);
7788
7789 // Fold 256 into 128
7790 addl(pos, 256);
7791 evpclmulqdq(xmm1, xmm0, xmm10, 0x01, Assembler::AVX_512bit);
7792 evpclmulqdq(xmm2, xmm0, xmm10, 0x10, Assembler::AVX_512bit);
7793 vpternlogq(xmm7, 0x96, xmm1, xmm2, Assembler::AVX_512bit); // xor ABC
7794
7795 evpclmulqdq(xmm5, xmm4, xmm10, 0x01, Assembler::AVX_512bit);
7796 evpclmulqdq(xmm6, xmm4, xmm10, 0x10, Assembler::AVX_512bit);
7797 vpternlogq(xmm8, 0x96, xmm5, xmm6, Assembler::AVX_512bit); // xor ABC
7798
7799 evmovdquq(xmm0, xmm7, Assembler::AVX_512bit);
7800 evmovdquq(xmm4, xmm8, Assembler::AVX_512bit);
7801
7802 addl(len, 128);
7803 jmp(L_fold_128_B_register);
7804
7805 // at this section of the code, there is 128 * x + y(0 <= y<128) bytes of buffer.The fold_128_B_loop
7806 // loop will fold 128B at a time until we have 128 + y Bytes of buffer
7807
7808 // fold 128B at a time.This section of the code folds 8 xmm registers in parallel
7809 bind(L_fold_128_B_loop);
7810 addl(pos, 128);
7811 fold512bit_crc32_avx512(xmm0, xmm10, xmm1, buf, pos, 0 * 64);
7812 fold512bit_crc32_avx512(xmm4, xmm10, xmm1, buf, pos, 1 * 64);
7813
7814 subl(len, 128);
7815 jcc(Assembler::greaterEqual, L_fold_128_B_loop);
7816
7817 addl(pos, 128);
7818
7819 // at this point, the buffer pointer is pointing at the last y Bytes of the buffer, where 0 <= y < 128
7820 // the 128B of folded data is in 8 of the xmm registers : xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7
7821 bind(L_fold_128_B_register);
7822 evmovdquq(xmm16, Address(table, 5 * 16), Assembler::AVX_512bit); // multiply by rk9-rk16
7823 evmovdquq(xmm11, Address(table, 9 * 16), Assembler::AVX_512bit); // multiply by rk17-rk20, rk1,rk2, 0,0
7824 evpclmulqdq(xmm1, xmm0, xmm16, 0x01, Assembler::AVX_512bit);
7825 evpclmulqdq(xmm2, xmm0, xmm16, 0x10, Assembler::AVX_512bit);
7826 // save last that has no multiplicand
7827 vextracti64x2(xmm7, xmm4, 3);
7828
7829 evpclmulqdq(xmm5, xmm4, xmm11, 0x01, Assembler::AVX_512bit);
7830 evpclmulqdq(xmm6, xmm4, xmm11, 0x10, Assembler::AVX_512bit);
7831 // Needed later in reduction loop
7832 movdqu(xmm10, Address(table, 1 * 16));
7833 vpternlogq(xmm1, 0x96, xmm2, xmm5, Assembler::AVX_512bit); // xor ABC
7834 vpternlogq(xmm1, 0x96, xmm6, xmm7, Assembler::AVX_512bit); // xor ABC
7835
7836 // Swap 1,0,3,2 - 01 00 11 10
7837 evshufi64x2(xmm8, xmm1, xmm1, 0x4e, Assembler::AVX_512bit);
7838 evpxorq(xmm8, xmm8, xmm1, Assembler::AVX_256bit);
7839 vextracti128(xmm5, xmm8, 1);
7840 evpxorq(xmm7, xmm5, xmm8, Assembler::AVX_128bit);
7841
7842 // instead of 128, we add 128 - 16 to the loop counter to save 1 instruction from the loop
7843 // instead of a cmp instruction, we use the negative flag with the jl instruction
7844 addl(len, 128 - 16);
7845 jcc(Assembler::less, L_final_reduction_for_128);
7846
7847 bind(L_16B_reduction_loop);
7848 vpclmulqdq(xmm8, xmm7, xmm10, 0x01);
7849 vpclmulqdq(xmm7, xmm7, xmm10, 0x10);
7850 vpxor(xmm7, xmm7, xmm8, Assembler::AVX_128bit);
7851 movdqu(xmm0, Address(buf, pos, Address::times_1, 0 * 16));
7852 vpxor(xmm7, xmm7, xmm0, Assembler::AVX_128bit);
7853 addl(pos, 16);
7854 subl(len, 16);
7855 jcc(Assembler::greaterEqual, L_16B_reduction_loop);
7856
7857 bind(L_final_reduction_for_128);
7858 addl(len, 16);
7859 jcc(Assembler::equal, L_128_done);
7860
7861 bind(L_get_last_two_xmms);
7862 movdqu(xmm2, xmm7);
7863 addl(pos, len);
7864 movdqu(xmm1, Address(buf, pos, Address::times_1, -16));
7865 subl(pos, len);
7866
7867 // get rid of the extra data that was loaded before
7868 // load the shift constant
7869 lea(rax, ExternalAddress(StubRoutines::x86::shuf_table_crc32_avx512_addr()));
7870 movdqu(xmm0, Address(rax, len));
7871 addl(rax, len);
7872
7873 vpshufb(xmm7, xmm7, xmm0, Assembler::AVX_128bit);
7874 //Change mask to 512
7875 vpxor(xmm0, xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_avx512_addr() + 2 * 16), Assembler::AVX_128bit, tmp2);
7876 vpshufb(xmm2, xmm2, xmm0, Assembler::AVX_128bit);
7877
7878 blendvpb(xmm2, xmm2, xmm1, xmm0, Assembler::AVX_128bit);
7879 vpclmulqdq(xmm8, xmm7, xmm10, 0x01);
7880 vpclmulqdq(xmm7, xmm7, xmm10, 0x10);
7881 vpxor(xmm7, xmm7, xmm8, Assembler::AVX_128bit);
7882 vpxor(xmm7, xmm7, xmm2, Assembler::AVX_128bit);
7883
7884 bind(L_128_done);
7885 // compute crc of a 128-bit value
7886 movdqu(xmm10, Address(table, 3 * 16));
7887 movdqu(xmm0, xmm7);
7888
7889 // 64b fold
7890 vpclmulqdq(xmm7, xmm7, xmm10, 0x0);
7891 vpsrldq(xmm0, xmm0, 0x8, Assembler::AVX_128bit);
7892 vpxor(xmm7, xmm7, xmm0, Assembler::AVX_128bit);
7893
7894 // 32b fold
7895 movdqu(xmm0, xmm7);
7896 vpslldq(xmm7, xmm7, 0x4, Assembler::AVX_128bit);
7897 vpclmulqdq(xmm7, xmm7, xmm10, 0x10);
7898 vpxor(xmm7, xmm7, xmm0, Assembler::AVX_128bit);
7899 jmp(L_barrett);
7900
7901 bind(L_less_than_256);
7902 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);
7903
7904 //barrett reduction
7905 bind(L_barrett);
7906 vpand(xmm7, xmm7, ExternalAddress(StubRoutines::x86::crc_by128_masks_avx512_addr() + 1 * 16), Assembler::AVX_128bit, tmp2);
7907 movdqu(xmm1, xmm7);
7908 movdqu(xmm2, xmm7);
7909 movdqu(xmm10, Address(table, 4 * 16));
7910
7911 pclmulqdq(xmm7, xmm10, 0x0);
7912 pxor(xmm7, xmm2);
7913 vpand(xmm7, xmm7, ExternalAddress(StubRoutines::x86::crc_by128_masks_avx512_addr()), Assembler::AVX_128bit, tmp2);
7914 movdqu(xmm2, xmm7);
7915 pclmulqdq(xmm7, xmm10, 0x10);
7916 pxor(xmm7, xmm2);
7917 pxor(xmm7, xmm1);
7918 pextrd(crc, xmm7, 2);
7919
7920 bind(L_cleanup);
7921 addptr(rsp, 16 * 2 + 8);
7922 pop(r12);
7923 }
7924
7925 // S. Gueron / Information Processing Letters 112 (2012) 184
7926 // Algorithm 4: Computing carry-less multiplication using a precomputed lookup table.
7927 // Input: A 32 bit value B = [byte3, byte2, byte1, byte0].
7928 // Output: the 64-bit carry-less product of B * CONST
7929 void MacroAssembler::crc32c_ipl_alg4(Register in, uint32_t n,
7930 Register tmp1, Register tmp2, Register tmp3) {
7931 lea(tmp3, ExternalAddress(StubRoutines::crc32c_table_addr()));
7932 if (n > 0) {
7933 addq(tmp3, n * 256 * 8);
7934 }
7935 // Q1 = TABLEExt[n][B & 0xFF];
7936 movl(tmp1, in);
7937 andl(tmp1, 0x000000FF);
7938 shll(tmp1, 3);
7939 addq(tmp1, tmp3);
7940 movq(tmp1, Address(tmp1, 0));
7941
7942 // Q2 = TABLEExt[n][B >> 8 & 0xFF];
7943 movl(tmp2, in);
7944 shrl(tmp2, 8);
7945 andl(tmp2, 0x000000FF);
7946 shll(tmp2, 3);
7947 addq(tmp2, tmp3);
7948 movq(tmp2, Address(tmp2, 0));
7949
7950 shlq(tmp2, 8);
7951 xorq(tmp1, tmp2);
7952
7953 // Q3 = TABLEExt[n][B >> 16 & 0xFF];
7954 movl(tmp2, in);
7955 shrl(tmp2, 16);
7956 andl(tmp2, 0x000000FF);
7957 shll(tmp2, 3);
7958 addq(tmp2, tmp3);
7959 movq(tmp2, Address(tmp2, 0));
7960
7961 shlq(tmp2, 16);
7962 xorq(tmp1, tmp2);
7963
7964 // Q4 = TABLEExt[n][B >> 24 & 0xFF];
7965 shrl(in, 24);
7966 andl(in, 0x000000FF);
7967 shll(in, 3);
7968 addq(in, tmp3);
7969 movq(in, Address(in, 0));
7970
7971 shlq(in, 24);
7972 xorq(in, tmp1);
7973 // return Q1 ^ Q2 << 8 ^ Q3 << 16 ^ Q4 << 24;
7974 }
7975
7976 void MacroAssembler::crc32c_pclmulqdq(XMMRegister w_xtmp1,
7977 Register in_out,
7978 uint32_t const_or_pre_comp_const_index, bool is_pclmulqdq_supported,
7979 XMMRegister w_xtmp2,
7980 Register tmp1,
7981 Register n_tmp2, Register n_tmp3) {
7982 if (is_pclmulqdq_supported) {
7983 movdl(w_xtmp1, in_out); // modified blindly
7984
7985 movl(tmp1, const_or_pre_comp_const_index);
7986 movdl(w_xtmp2, tmp1);
7987 pclmulqdq(w_xtmp1, w_xtmp2, 0);
7988
7989 movdq(in_out, w_xtmp1);
7990 } else {
7991 crc32c_ipl_alg4(in_out, const_or_pre_comp_const_index, tmp1, n_tmp2, n_tmp3);
7992 }
7993 }
7994
7995 // Recombination Alternative 2: No bit-reflections
7996 // T1 = (CRC_A * U1) << 1
7997 // T2 = (CRC_B * U2) << 1
7998 // C1 = T1 >> 32
7999 // C2 = T2 >> 32
8000 // T1 = T1 & 0xFFFFFFFF
8001 // T2 = T2 & 0xFFFFFFFF
8002 // T1 = CRC32(0, T1)
8003 // T2 = CRC32(0, T2)
8004 // C1 = C1 ^ T1
8005 // C2 = C2 ^ T2
8006 // CRC = C1 ^ C2 ^ CRC_C
8007 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,
8008 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
8009 Register tmp1, Register tmp2,
8010 Register n_tmp3) {
8011 crc32c_pclmulqdq(w_xtmp1, in_out, const_or_pre_comp_const_index_u1, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3);
8012 crc32c_pclmulqdq(w_xtmp2, in1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3);
8013 shlq(in_out, 1);
8014 movl(tmp1, in_out);
8015 shrq(in_out, 32);
8016 xorl(tmp2, tmp2);
8017 crc32(tmp2, tmp1, 4);
8018 xorl(in_out, tmp2); // we don't care about upper 32 bit contents here
8019 shlq(in1, 1);
8020 movl(tmp1, in1);
8021 shrq(in1, 32);
8022 xorl(tmp2, tmp2);
8023 crc32(tmp2, tmp1, 4);
8024 xorl(in1, tmp2);
8025 xorl(in_out, in1);
8026 xorl(in_out, in2);
8027 }
8028
8029 // Set N to predefined value
8030 // Subtract from a length of a buffer
8031 // execute in a loop:
8032 // CRC_A = 0xFFFFFFFF, CRC_B = 0, CRC_C = 0
8033 // for i = 1 to N do
8034 // CRC_A = CRC32(CRC_A, A[i])
8035 // CRC_B = CRC32(CRC_B, B[i])
8036 // CRC_C = CRC32(CRC_C, C[i])
8037 // end for
8038 // Recombine
8039 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,
8040 Register in_out1, Register in_out2, Register in_out3,
8041 Register tmp1, Register tmp2, Register tmp3,
8042 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
8043 Register tmp4, Register tmp5,
8044 Register n_tmp6) {
8045 Label L_processPartitions;
8046 Label L_processPartition;
8047 Label L_exit;
8048
8049 bind(L_processPartitions);
8050 cmpl(in_out1, 3 * size);
8051 jcc(Assembler::less, L_exit);
8052 xorl(tmp1, tmp1);
8053 xorl(tmp2, tmp2);
8054 movq(tmp3, in_out2);
8055 addq(tmp3, size);
8056
8057 bind(L_processPartition);
8058 crc32(in_out3, Address(in_out2, 0), 8);
8059 crc32(tmp1, Address(in_out2, size), 8);
8060 crc32(tmp2, Address(in_out2, size * 2), 8);
8061 addq(in_out2, 8);
8062 cmpq(in_out2, tmp3);
8063 jcc(Assembler::less, L_processPartition);
8064 crc32c_rec_alt2(const_or_pre_comp_const_index_u1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, in_out3, tmp1, tmp2,
8065 w_xtmp1, w_xtmp2, w_xtmp3,
8066 tmp4, tmp5,
8067 n_tmp6);
8068 addq(in_out2, 2 * size);
8069 subl(in_out1, 3 * size);
8070 jmp(L_processPartitions);
8071
8072 bind(L_exit);
8073 }
8074
8075 // Algorithm 2: Pipelined usage of the CRC32 instruction.
8076 // Input: A buffer I of L bytes.
8077 // Output: the CRC32C value of the buffer.
8078 // Notations:
8079 // Write L = 24N + r, with N = floor (L/24).
8080 // r = L mod 24 (0 <= r < 24).
8081 // Consider I as the concatenation of A|B|C|R, where A, B, C, each,
8082 // N quadwords, and R consists of r bytes.
8083 // A[j] = I [8j+7:8j], j= 0, 1, ..., N-1
8084 // B[j] = I [N + 8j+7:N + 8j], j= 0, 1, ..., N-1
8085 // C[j] = I [2N + 8j+7:2N + 8j], j= 0, 1, ..., N-1
8086 // if r > 0 R[j] = I [3N +j], j= 0, 1, ...,r-1
8087 void MacroAssembler::crc32c_ipl_alg2_alt2(Register in_out, Register in1, Register in2,
8088 Register tmp1, Register tmp2, Register tmp3,
8089 Register tmp4, Register tmp5, Register tmp6,
8090 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3,
8091 bool is_pclmulqdq_supported) {
8092 uint32_t const_or_pre_comp_const_index[CRC32C_NUM_PRECOMPUTED_CONSTANTS];
8093 Label L_wordByWord;
8094 Label L_byteByByteProlog;
8095 Label L_byteByByte;
8096 Label L_exit;
8097
8098 if (is_pclmulqdq_supported ) {
8099 const_or_pre_comp_const_index[1] = *(uint32_t *)StubRoutines::crc32c_table_addr();
8100 const_or_pre_comp_const_index[0] = *((uint32_t *)StubRoutines::crc32c_table_addr() + 1);
8101
8102 const_or_pre_comp_const_index[3] = *((uint32_t *)StubRoutines::crc32c_table_addr() + 2);
8103 const_or_pre_comp_const_index[2] = *((uint32_t *)StubRoutines::crc32c_table_addr() + 3);
8104
8105 const_or_pre_comp_const_index[5] = *((uint32_t *)StubRoutines::crc32c_table_addr() + 4);
8106 const_or_pre_comp_const_index[4] = *((uint32_t *)StubRoutines::crc32c_table_addr() + 5);
8107 assert((CRC32C_NUM_PRECOMPUTED_CONSTANTS - 1 ) == 5, "Checking whether you declared all of the constants based on the number of \"chunks\"");
8108 } else {
8109 const_or_pre_comp_const_index[0] = 1;
8110 const_or_pre_comp_const_index[1] = 0;
8111
8112 const_or_pre_comp_const_index[2] = 3;
8113 const_or_pre_comp_const_index[3] = 2;
8114
8115 const_or_pre_comp_const_index[4] = 5;
8116 const_or_pre_comp_const_index[5] = 4;
8117 }
8118 crc32c_proc_chunk(CRC32C_HIGH, const_or_pre_comp_const_index[0], const_or_pre_comp_const_index[1], is_pclmulqdq_supported,
8119 in2, in1, in_out,
8120 tmp1, tmp2, tmp3,
8121 w_xtmp1, w_xtmp2, w_xtmp3,
8122 tmp4, tmp5,
8123 tmp6);
8124 crc32c_proc_chunk(CRC32C_MIDDLE, const_or_pre_comp_const_index[2], const_or_pre_comp_const_index[3], is_pclmulqdq_supported,
8125 in2, in1, in_out,
8126 tmp1, tmp2, tmp3,
8127 w_xtmp1, w_xtmp2, w_xtmp3,
8128 tmp4, tmp5,
8129 tmp6);
8130 crc32c_proc_chunk(CRC32C_LOW, const_or_pre_comp_const_index[4], const_or_pre_comp_const_index[5], is_pclmulqdq_supported,
8131 in2, in1, in_out,
8132 tmp1, tmp2, tmp3,
8133 w_xtmp1, w_xtmp2, w_xtmp3,
8134 tmp4, tmp5,
8135 tmp6);
8136 movl(tmp1, in2);
8137 andl(tmp1, 0x00000007);
8138 negl(tmp1);
8139 addl(tmp1, in2);
8140 addq(tmp1, in1);
8141
8142 cmpq(in1, tmp1);
8143 jccb(Assembler::greaterEqual, L_byteByByteProlog);
8144 align(16);
8145 BIND(L_wordByWord);
8146 crc32(in_out, Address(in1, 0), 8);
8147 addq(in1, 8);
8148 cmpq(in1, tmp1);
8149 jcc(Assembler::less, L_wordByWord);
8150
8151 BIND(L_byteByByteProlog);
8152 andl(in2, 0x00000007);
8153 movl(tmp2, 1);
8154
8155 cmpl(tmp2, in2);
8156 jccb(Assembler::greater, L_exit);
8157 BIND(L_byteByByte);
8158 crc32(in_out, Address(in1, 0), 1);
8159 incq(in1);
8160 incl(tmp2);
8161 cmpl(tmp2, in2);
8162 jcc(Assembler::lessEqual, L_byteByByte);
8163
8164 BIND(L_exit);
8165 }
8166 #undef BIND
8167 #undef BLOCK_COMMENT
8168
8169 // Compress char[] array to byte[].
8170 // Intrinsic for java.lang.StringUTF16.compress(char[] src, int srcOff, byte[] dst, int dstOff, int len)
8171 // Return the array length if every element in array can be encoded,
8172 // otherwise, the index of first non-latin1 (> 0xff) character.
8173 // @IntrinsicCandidate
8174 // public static int compress(char[] src, int srcOff, byte[] dst, int dstOff, int len) {
8175 // for (int i = 0; i < len; i++) {
8176 // char c = src[srcOff];
8177 // if (c > 0xff) {
8178 // return i; // return index of non-latin1 char
8179 // }
8180 // dst[dstOff] = (byte)c;
8181 // srcOff++;
8182 // dstOff++;
8183 // }
8184 // return len;
8185 // }
8186 void MacroAssembler::char_array_compress(Register src, Register dst, Register len,
8187 XMMRegister tmp1Reg, XMMRegister tmp2Reg,
8188 XMMRegister tmp3Reg, XMMRegister tmp4Reg,
8189 Register tmp5, Register result, KRegister mask1, KRegister mask2) {
8190 Label copy_chars_loop, done, reset_sp, copy_tail;
8191
8192 // rsi: src
8193 // rdi: dst
8194 // rdx: len
8195 // rcx: tmp5
8196 // rax: result
8197
8198 // rsi holds start addr of source char[] to be compressed
8199 // rdi holds start addr of destination byte[]
8200 // rdx holds length
8201
8202 assert(len != result, "");
8203
8204 // save length for return
8205 movl(result, len);
8206
8207 if ((AVX3Threshold == 0) && (UseAVX > 2) && // AVX512
8208 VM_Version::supports_avx512vlbw() &&
8209 VM_Version::supports_bmi2()) {
8210
8211 Label copy_32_loop, copy_loop_tail, below_threshold, reset_for_copy_tail;
8212
8213 // alignment
8214 Label post_alignment;
8215
8216 // if length of the string is less than 32, handle it the old fashioned way
8217 testl(len, -32);
8218 jcc(Assembler::zero, below_threshold);
8219
8220 // First check whether a character is compressible ( <= 0xFF).
8221 // Create mask to test for Unicode chars inside zmm vector
8222 movl(tmp5, 0x00FF);
8223 evpbroadcastw(tmp2Reg, tmp5, Assembler::AVX_512bit);
8224
8225 testl(len, -64);
8226 jccb(Assembler::zero, post_alignment);
8227
8228 movl(tmp5, dst);
8229 andl(tmp5, (32 - 1));
8230 negl(tmp5);
8231 andl(tmp5, (32 - 1));
8232
8233 // bail out when there is nothing to be done
8234 testl(tmp5, 0xFFFFFFFF);
8235 jccb(Assembler::zero, post_alignment);
8236
8237 // ~(~0 << len), where len is the # of remaining elements to process
8238 movl(len, 0xFFFFFFFF);
8239 shlxl(len, len, tmp5);
8240 notl(len);
8241 kmovdl(mask2, len);
8242 movl(len, result);
8243
8244 evmovdquw(tmp1Reg, mask2, Address(src, 0), /*merge*/ false, Assembler::AVX_512bit);
8245 evpcmpw(mask1, mask2, tmp1Reg, tmp2Reg, Assembler::le, /*signed*/ false, Assembler::AVX_512bit);
8246 ktestd(mask1, mask2);
8247 jcc(Assembler::carryClear, copy_tail);
8248
8249 evpmovwb(Address(dst, 0), mask2, tmp1Reg, Assembler::AVX_512bit);
8250
8251 addptr(src, tmp5);
8252 addptr(src, tmp5);
8253 addptr(dst, tmp5);
8254 subl(len, tmp5);
8255
8256 bind(post_alignment);
8257 // end of alignment
8258
8259 movl(tmp5, len);
8260 andl(tmp5, (32 - 1)); // tail count (in chars)
8261 andl(len, ~(32 - 1)); // vector count (in chars)
8262 jccb(Assembler::zero, copy_loop_tail);
8263
8264 lea(src, Address(src, len, Address::times_2));
8265 lea(dst, Address(dst, len, Address::times_1));
8266 negptr(len);
8267
8268 bind(copy_32_loop);
8269 evmovdquw(tmp1Reg, Address(src, len, Address::times_2), Assembler::AVX_512bit);
8270 evpcmpuw(mask1, tmp1Reg, tmp2Reg, Assembler::le, Assembler::AVX_512bit);
8271 kortestdl(mask1, mask1);
8272 jccb(Assembler::carryClear, reset_for_copy_tail);
8273
8274 // All elements in current processed chunk are valid candidates for
8275 // compression. Write a truncated byte elements to the memory.
8276 evpmovwb(Address(dst, len, Address::times_1), tmp1Reg, Assembler::AVX_512bit);
8277 addptr(len, 32);
8278 jccb(Assembler::notZero, copy_32_loop);
8279
8280 bind(copy_loop_tail);
8281 // bail out when there is nothing to be done
8282 testl(tmp5, 0xFFFFFFFF);
8283 jcc(Assembler::zero, done);
8284
8285 movl(len, tmp5);
8286
8287 // ~(~0 << len), where len is the # of remaining elements to process
8288 movl(tmp5, 0xFFFFFFFF);
8289 shlxl(tmp5, tmp5, len);
8290 notl(tmp5);
8291
8292 kmovdl(mask2, tmp5);
8293
8294 evmovdquw(tmp1Reg, mask2, Address(src, 0), /*merge*/ false, Assembler::AVX_512bit);
8295 evpcmpw(mask1, mask2, tmp1Reg, tmp2Reg, Assembler::le, /*signed*/ false, Assembler::AVX_512bit);
8296 ktestd(mask1, mask2);
8297 jcc(Assembler::carryClear, copy_tail);
8298
8299 evpmovwb(Address(dst, 0), mask2, tmp1Reg, Assembler::AVX_512bit);
8300 jmp(done);
8301
8302 bind(reset_for_copy_tail);
8303 lea(src, Address(src, tmp5, Address::times_2));
8304 lea(dst, Address(dst, tmp5, Address::times_1));
8305 subptr(len, tmp5);
8306 jmp(copy_chars_loop);
8307
8308 bind(below_threshold);
8309 }
8310
8311 if (UseSSE42Intrinsics) {
8312 Label copy_32_loop, copy_16, copy_tail_sse, reset_for_copy_tail;
8313
8314 // vectored compression
8315 testl(len, 0xfffffff8);
8316 jcc(Assembler::zero, copy_tail);
8317
8318 movl(tmp5, 0xff00ff00); // create mask to test for Unicode chars in vectors
8319 movdl(tmp1Reg, tmp5);
8320 pshufd(tmp1Reg, tmp1Reg, 0); // store Unicode mask in tmp1Reg
8321
8322 andl(len, 0xfffffff0);
8323 jccb(Assembler::zero, copy_16);
8324
8325 // compress 16 chars per iter
8326 pxor(tmp4Reg, tmp4Reg);
8327
8328 lea(src, Address(src, len, Address::times_2));
8329 lea(dst, Address(dst, len, Address::times_1));
8330 negptr(len);
8331
8332 bind(copy_32_loop);
8333 movdqu(tmp2Reg, Address(src, len, Address::times_2)); // load 1st 8 characters
8334 por(tmp4Reg, tmp2Reg);
8335 movdqu(tmp3Reg, Address(src, len, Address::times_2, 16)); // load next 8 characters
8336 por(tmp4Reg, tmp3Reg);
8337 ptest(tmp4Reg, tmp1Reg); // check for Unicode chars in next vector
8338 jccb(Assembler::notZero, reset_for_copy_tail);
8339 packuswb(tmp2Reg, tmp3Reg); // only ASCII chars; compress each to 1 byte
8340 movdqu(Address(dst, len, Address::times_1), tmp2Reg);
8341 addptr(len, 16);
8342 jccb(Assembler::notZero, copy_32_loop);
8343
8344 // compress next vector of 8 chars (if any)
8345 bind(copy_16);
8346 // len = 0
8347 testl(result, 0x00000008); // check if there's a block of 8 chars to compress
8348 jccb(Assembler::zero, copy_tail_sse);
8349
8350 pxor(tmp3Reg, tmp3Reg);
8351
8352 movdqu(tmp2Reg, Address(src, 0));
8353 ptest(tmp2Reg, tmp1Reg); // check for Unicode chars in vector
8354 jccb(Assembler::notZero, reset_for_copy_tail);
8355 packuswb(tmp2Reg, tmp3Reg); // only LATIN1 chars; compress each to 1 byte
8356 movq(Address(dst, 0), tmp2Reg);
8357 addptr(src, 16);
8358 addptr(dst, 8);
8359 jmpb(copy_tail_sse);
8360
8361 bind(reset_for_copy_tail);
8362 movl(tmp5, result);
8363 andl(tmp5, 0x0000000f);
8364 lea(src, Address(src, tmp5, Address::times_2));
8365 lea(dst, Address(dst, tmp5, Address::times_1));
8366 subptr(len, tmp5);
8367 jmpb(copy_chars_loop);
8368
8369 bind(copy_tail_sse);
8370 movl(len, result);
8371 andl(len, 0x00000007); // tail count (in chars)
8372 }
8373 // compress 1 char per iter
8374 bind(copy_tail);
8375 testl(len, len);
8376 jccb(Assembler::zero, done);
8377 lea(src, Address(src, len, Address::times_2));
8378 lea(dst, Address(dst, len, Address::times_1));
8379 negptr(len);
8380
8381 bind(copy_chars_loop);
8382 load_unsigned_short(tmp5, Address(src, len, Address::times_2));
8383 testl(tmp5, 0xff00); // check if Unicode char
8384 jccb(Assembler::notZero, reset_sp);
8385 movb(Address(dst, len, Address::times_1), tmp5); // ASCII char; compress to 1 byte
8386 increment(len);
8387 jccb(Assembler::notZero, copy_chars_loop);
8388
8389 // add len then return (len will be zero if compress succeeded, otherwise negative)
8390 bind(reset_sp);
8391 addl(result, len);
8392
8393 bind(done);
8394 }
8395
8396 // Inflate byte[] array to char[].
8397 // ..\jdk\src\java.base\share\classes\java\lang\StringLatin1.java
8398 // @IntrinsicCandidate
8399 // private static void inflate(byte[] src, int srcOff, char[] dst, int dstOff, int len) {
8400 // for (int i = 0; i < len; i++) {
8401 // dst[dstOff++] = (char)(src[srcOff++] & 0xff);
8402 // }
8403 // }
8404 void MacroAssembler::byte_array_inflate(Register src, Register dst, Register len,
8405 XMMRegister tmp1, Register tmp2, KRegister mask) {
8406 Label copy_chars_loop, done, below_threshold, avx3_threshold;
8407 // rsi: src
8408 // rdi: dst
8409 // rdx: len
8410 // rcx: tmp2
8411
8412 // rsi holds start addr of source byte[] to be inflated
8413 // rdi holds start addr of destination char[]
8414 // rdx holds length
8415 assert_different_registers(src, dst, len, tmp2);
8416 movl(tmp2, len);
8417 if ((UseAVX > 2) && // AVX512
8418 VM_Version::supports_avx512vlbw() &&
8419 VM_Version::supports_bmi2()) {
8420
8421 Label copy_32_loop, copy_tail;
8422 Register tmp3_aliased = len;
8423
8424 // if length of the string is less than 16, handle it in an old fashioned way
8425 testl(len, -16);
8426 jcc(Assembler::zero, below_threshold);
8427
8428 testl(len, -1 * AVX3Threshold);
8429 jcc(Assembler::zero, avx3_threshold);
8430
8431 // In order to use only one arithmetic operation for the main loop we use
8432 // this pre-calculation
8433 andl(tmp2, (32 - 1)); // tail count (in chars), 32 element wide loop
8434 andl(len, -32); // vector count
8435 jccb(Assembler::zero, copy_tail);
8436
8437 lea(src, Address(src, len, Address::times_1));
8438 lea(dst, Address(dst, len, Address::times_2));
8439 negptr(len);
8440
8441
8442 // inflate 32 chars per iter
8443 bind(copy_32_loop);
8444 vpmovzxbw(tmp1, Address(src, len, Address::times_1), Assembler::AVX_512bit);
8445 evmovdquw(Address(dst, len, Address::times_2), tmp1, Assembler::AVX_512bit);
8446 addptr(len, 32);
8447 jcc(Assembler::notZero, copy_32_loop);
8448
8449 bind(copy_tail);
8450 // bail out when there is nothing to be done
8451 testl(tmp2, -1); // we don't destroy the contents of tmp2 here
8452 jcc(Assembler::zero, done);
8453
8454 // ~(~0 << length), where length is the # of remaining elements to process
8455 movl(tmp3_aliased, -1);
8456 shlxl(tmp3_aliased, tmp3_aliased, tmp2);
8457 notl(tmp3_aliased);
8458 kmovdl(mask, tmp3_aliased);
8459 evpmovzxbw(tmp1, mask, Address(src, 0), Assembler::AVX_512bit);
8460 evmovdquw(Address(dst, 0), mask, tmp1, /*merge*/ true, Assembler::AVX_512bit);
8461
8462 jmp(done);
8463 bind(avx3_threshold);
8464 }
8465 if (UseSSE42Intrinsics) {
8466 Label copy_16_loop, copy_8_loop, copy_bytes, copy_new_tail, copy_tail;
8467
8468 if (UseAVX > 1) {
8469 andl(tmp2, (16 - 1));
8470 andl(len, -16);
8471 jccb(Assembler::zero, copy_new_tail);
8472 } else {
8473 andl(tmp2, 0x00000007); // tail count (in chars)
8474 andl(len, 0xfffffff8); // vector count (in chars)
8475 jccb(Assembler::zero, copy_tail);
8476 }
8477
8478 // vectored inflation
8479 lea(src, Address(src, len, Address::times_1));
8480 lea(dst, Address(dst, len, Address::times_2));
8481 negptr(len);
8482
8483 if (UseAVX > 1) {
8484 bind(copy_16_loop);
8485 vpmovzxbw(tmp1, Address(src, len, Address::times_1), Assembler::AVX_256bit);
8486 vmovdqu(Address(dst, len, Address::times_2), tmp1);
8487 addptr(len, 16);
8488 jcc(Assembler::notZero, copy_16_loop);
8489
8490 bind(below_threshold);
8491 bind(copy_new_tail);
8492 movl(len, tmp2);
8493 andl(tmp2, 0x00000007);
8494 andl(len, 0xFFFFFFF8);
8495 jccb(Assembler::zero, copy_tail);
8496
8497 pmovzxbw(tmp1, Address(src, 0));
8498 movdqu(Address(dst, 0), tmp1);
8499 addptr(src, 8);
8500 addptr(dst, 2 * 8);
8501
8502 jmp(copy_tail, true);
8503 }
8504
8505 // inflate 8 chars per iter
8506 bind(copy_8_loop);
8507 pmovzxbw(tmp1, Address(src, len, Address::times_1)); // unpack to 8 words
8508 movdqu(Address(dst, len, Address::times_2), tmp1);
8509 addptr(len, 8);
8510 jcc(Assembler::notZero, copy_8_loop);
8511
8512 bind(copy_tail);
8513 movl(len, tmp2);
8514
8515 cmpl(len, 4);
8516 jccb(Assembler::less, copy_bytes);
8517
8518 movdl(tmp1, Address(src, 0)); // load 4 byte chars
8519 pmovzxbw(tmp1, tmp1);
8520 movq(Address(dst, 0), tmp1);
8521 subptr(len, 4);
8522 addptr(src, 4);
8523 addptr(dst, 8);
8524
8525 bind(copy_bytes);
8526 } else {
8527 bind(below_threshold);
8528 }
8529
8530 testl(len, len);
8531 jccb(Assembler::zero, done);
8532 lea(src, Address(src, len, Address::times_1));
8533 lea(dst, Address(dst, len, Address::times_2));
8534 negptr(len);
8535
8536 // inflate 1 char per iter
8537 bind(copy_chars_loop);
8538 load_unsigned_byte(tmp2, Address(src, len, Address::times_1)); // load byte char
8539 movw(Address(dst, len, Address::times_2), tmp2); // inflate byte char to word
8540 increment(len);
8541 jcc(Assembler::notZero, copy_chars_loop);
8542
8543 bind(done);
8544 }
8545
8546 void MacroAssembler::evmovdqu(BasicType type, KRegister kmask, XMMRegister dst, XMMRegister src, bool merge, int vector_len) {
8547 switch(type) {
8548 case T_BYTE:
8549 case T_BOOLEAN:
8550 evmovdqub(dst, kmask, src, merge, vector_len);
8551 break;
8552 case T_CHAR:
8553 case T_SHORT:
8554 evmovdquw(dst, kmask, src, merge, vector_len);
8555 break;
8556 case T_INT:
8557 case T_FLOAT:
8558 evmovdqul(dst, kmask, src, merge, vector_len);
8559 break;
8560 case T_LONG:
8561 case T_DOUBLE:
8562 evmovdquq(dst, kmask, src, merge, vector_len);
8563 break;
8564 default:
8565 fatal("Unexpected type argument %s", type2name(type));
8566 break;
8567 }
8568 }
8569
8570
8571 void MacroAssembler::evmovdqu(BasicType type, KRegister kmask, XMMRegister dst, Address src, bool merge, int vector_len) {
8572 switch(type) {
8573 case T_BYTE:
8574 case T_BOOLEAN:
8575 evmovdqub(dst, kmask, src, merge, vector_len);
8576 break;
8577 case T_CHAR:
8578 case T_SHORT:
8579 evmovdquw(dst, kmask, src, merge, vector_len);
8580 break;
8581 case T_INT:
8582 case T_FLOAT:
8583 evmovdqul(dst, kmask, src, merge, vector_len);
8584 break;
8585 case T_LONG:
8586 case T_DOUBLE:
8587 evmovdquq(dst, kmask, src, merge, vector_len);
8588 break;
8589 default:
8590 fatal("Unexpected type argument %s", type2name(type));
8591 break;
8592 }
8593 }
8594
8595 void MacroAssembler::evmovdqu(BasicType type, KRegister kmask, Address dst, XMMRegister src, bool merge, int vector_len) {
8596 switch(type) {
8597 case T_BYTE:
8598 case T_BOOLEAN:
8599 evmovdqub(dst, kmask, src, merge, vector_len);
8600 break;
8601 case T_CHAR:
8602 case T_SHORT:
8603 evmovdquw(dst, kmask, src, merge, vector_len);
8604 break;
8605 case T_INT:
8606 case T_FLOAT:
8607 evmovdqul(dst, kmask, src, merge, vector_len);
8608 break;
8609 case T_LONG:
8610 case T_DOUBLE:
8611 evmovdquq(dst, kmask, src, merge, vector_len);
8612 break;
8613 default:
8614 fatal("Unexpected type argument %s", type2name(type));
8615 break;
8616 }
8617 }
8618
8619 void MacroAssembler::knot(uint masklen, KRegister dst, KRegister src, KRegister ktmp, Register rtmp) {
8620 switch(masklen) {
8621 case 2:
8622 knotbl(dst, src);
8623 movl(rtmp, 3);
8624 kmovbl(ktmp, rtmp);
8625 kandbl(dst, ktmp, dst);
8626 break;
8627 case 4:
8628 knotbl(dst, src);
8629 movl(rtmp, 15);
8630 kmovbl(ktmp, rtmp);
8631 kandbl(dst, ktmp, dst);
8632 break;
8633 case 8:
8634 knotbl(dst, src);
8635 break;
8636 case 16:
8637 knotwl(dst, src);
8638 break;
8639 case 32:
8640 knotdl(dst, src);
8641 break;
8642 case 64:
8643 knotql(dst, src);
8644 break;
8645 default:
8646 fatal("Unexpected vector length %d", masklen);
8647 break;
8648 }
8649 }
8650
8651 void MacroAssembler::kand(BasicType type, KRegister dst, KRegister src1, KRegister src2) {
8652 switch(type) {
8653 case T_BOOLEAN:
8654 case T_BYTE:
8655 kandbl(dst, src1, src2);
8656 break;
8657 case T_CHAR:
8658 case T_SHORT:
8659 kandwl(dst, src1, src2);
8660 break;
8661 case T_INT:
8662 case T_FLOAT:
8663 kanddl(dst, src1, src2);
8664 break;
8665 case T_LONG:
8666 case T_DOUBLE:
8667 kandql(dst, src1, src2);
8668 break;
8669 default:
8670 fatal("Unexpected type argument %s", type2name(type));
8671 break;
8672 }
8673 }
8674
8675 void MacroAssembler::kor(BasicType type, KRegister dst, KRegister src1, KRegister src2) {
8676 switch(type) {
8677 case T_BOOLEAN:
8678 case T_BYTE:
8679 korbl(dst, src1, src2);
8680 break;
8681 case T_CHAR:
8682 case T_SHORT:
8683 korwl(dst, src1, src2);
8684 break;
8685 case T_INT:
8686 case T_FLOAT:
8687 kordl(dst, src1, src2);
8688 break;
8689 case T_LONG:
8690 case T_DOUBLE:
8691 korql(dst, src1, src2);
8692 break;
8693 default:
8694 fatal("Unexpected type argument %s", type2name(type));
8695 break;
8696 }
8697 }
8698
8699 void MacroAssembler::kxor(BasicType type, KRegister dst, KRegister src1, KRegister src2) {
8700 switch(type) {
8701 case T_BOOLEAN:
8702 case T_BYTE:
8703 kxorbl(dst, src1, src2);
8704 break;
8705 case T_CHAR:
8706 case T_SHORT:
8707 kxorwl(dst, src1, src2);
8708 break;
8709 case T_INT:
8710 case T_FLOAT:
8711 kxordl(dst, src1, src2);
8712 break;
8713 case T_LONG:
8714 case T_DOUBLE:
8715 kxorql(dst, src1, src2);
8716 break;
8717 default:
8718 fatal("Unexpected type argument %s", type2name(type));
8719 break;
8720 }
8721 }
8722
8723 void MacroAssembler::evperm(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
8724 switch(type) {
8725 case T_BOOLEAN:
8726 case T_BYTE:
8727 evpermb(dst, mask, nds, src, merge, vector_len); break;
8728 case T_CHAR:
8729 case T_SHORT:
8730 evpermw(dst, mask, nds, src, merge, vector_len); break;
8731 case T_INT:
8732 case T_FLOAT:
8733 evpermd(dst, mask, nds, src, merge, vector_len); break;
8734 case T_LONG:
8735 case T_DOUBLE:
8736 evpermq(dst, mask, nds, src, merge, vector_len); break;
8737 default:
8738 fatal("Unexpected type argument %s", type2name(type)); break;
8739 }
8740 }
8741
8742 void MacroAssembler::evperm(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
8743 switch(type) {
8744 case T_BOOLEAN:
8745 case T_BYTE:
8746 evpermb(dst, mask, nds, src, merge, vector_len); break;
8747 case T_CHAR:
8748 case T_SHORT:
8749 evpermw(dst, mask, nds, src, merge, vector_len); break;
8750 case T_INT:
8751 case T_FLOAT:
8752 evpermd(dst, mask, nds, src, merge, vector_len); break;
8753 case T_LONG:
8754 case T_DOUBLE:
8755 evpermq(dst, mask, nds, src, merge, vector_len); break;
8756 default:
8757 fatal("Unexpected type argument %s", type2name(type)); break;
8758 }
8759 }
8760
8761 void MacroAssembler::evpminu(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
8762 switch(type) {
8763 case T_BYTE:
8764 evpminub(dst, mask, nds, src, merge, vector_len); break;
8765 case T_SHORT:
8766 evpminuw(dst, mask, nds, src, merge, vector_len); break;
8767 case T_INT:
8768 evpminud(dst, mask, nds, src, merge, vector_len); break;
8769 case T_LONG:
8770 evpminuq(dst, mask, nds, src, merge, vector_len); break;
8771 default:
8772 fatal("Unexpected type argument %s", type2name(type)); break;
8773 }
8774 }
8775
8776 void MacroAssembler::evpmaxu(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
8777 switch(type) {
8778 case T_BYTE:
8779 evpmaxub(dst, mask, nds, src, merge, vector_len); break;
8780 case T_SHORT:
8781 evpmaxuw(dst, mask, nds, src, merge, vector_len); break;
8782 case T_INT:
8783 evpmaxud(dst, mask, nds, src, merge, vector_len); break;
8784 case T_LONG:
8785 evpmaxuq(dst, mask, nds, src, merge, vector_len); break;
8786 default:
8787 fatal("Unexpected type argument %s", type2name(type)); break;
8788 }
8789 }
8790
8791 void MacroAssembler::evpminu(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
8792 switch(type) {
8793 case T_BYTE:
8794 evpminub(dst, mask, nds, src, merge, vector_len); break;
8795 case T_SHORT:
8796 evpminuw(dst, mask, nds, src, merge, vector_len); break;
8797 case T_INT:
8798 evpminud(dst, mask, nds, src, merge, vector_len); break;
8799 case T_LONG:
8800 evpminuq(dst, mask, nds, src, merge, vector_len); break;
8801 default:
8802 fatal("Unexpected type argument %s", type2name(type)); break;
8803 }
8804 }
8805
8806 void MacroAssembler::evpmaxu(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
8807 switch(type) {
8808 case T_BYTE:
8809 evpmaxub(dst, mask, nds, src, merge, vector_len); break;
8810 case T_SHORT:
8811 evpmaxuw(dst, mask, nds, src, merge, vector_len); break;
8812 case T_INT:
8813 evpmaxud(dst, mask, nds, src, merge, vector_len); break;
8814 case T_LONG:
8815 evpmaxuq(dst, mask, nds, src, merge, vector_len); break;
8816 default:
8817 fatal("Unexpected type argument %s", type2name(type)); break;
8818 }
8819 }
8820
8821 void MacroAssembler::evpmins(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
8822 switch(type) {
8823 case T_BYTE:
8824 evpminsb(dst, mask, nds, src, merge, vector_len); break;
8825 case T_SHORT:
8826 evpminsw(dst, mask, nds, src, merge, vector_len); break;
8827 case T_INT:
8828 evpminsd(dst, mask, nds, src, merge, vector_len); break;
8829 case T_LONG:
8830 evpminsq(dst, mask, nds, src, merge, vector_len); break;
8831 default:
8832 fatal("Unexpected type argument %s", type2name(type)); break;
8833 }
8834 }
8835
8836 void MacroAssembler::evpmaxs(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
8837 switch(type) {
8838 case T_BYTE:
8839 evpmaxsb(dst, mask, nds, src, merge, vector_len); break;
8840 case T_SHORT:
8841 evpmaxsw(dst, mask, nds, src, merge, vector_len); break;
8842 case T_INT:
8843 evpmaxsd(dst, mask, nds, src, merge, vector_len); break;
8844 case T_LONG:
8845 evpmaxsq(dst, mask, nds, src, merge, vector_len); break;
8846 default:
8847 fatal("Unexpected type argument %s", type2name(type)); break;
8848 }
8849 }
8850
8851 void MacroAssembler::evpmins(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
8852 switch(type) {
8853 case T_BYTE:
8854 evpminsb(dst, mask, nds, src, merge, vector_len); break;
8855 case T_SHORT:
8856 evpminsw(dst, mask, nds, src, merge, vector_len); break;
8857 case T_INT:
8858 evpminsd(dst, mask, nds, src, merge, vector_len); break;
8859 case T_LONG:
8860 evpminsq(dst, mask, nds, src, merge, vector_len); break;
8861 default:
8862 fatal("Unexpected type argument %s", type2name(type)); break;
8863 }
8864 }
8865
8866 void MacroAssembler::evpmaxs(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
8867 switch(type) {
8868 case T_BYTE:
8869 evpmaxsb(dst, mask, nds, src, merge, vector_len); break;
8870 case T_SHORT:
8871 evpmaxsw(dst, mask, nds, src, merge, vector_len); break;
8872 case T_INT:
8873 evpmaxsd(dst, mask, nds, src, merge, vector_len); break;
8874 case T_LONG:
8875 evpmaxsq(dst, mask, nds, src, merge, vector_len); break;
8876 default:
8877 fatal("Unexpected type argument %s", type2name(type)); break;
8878 }
8879 }
8880
8881 void MacroAssembler::evxor(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
8882 switch(type) {
8883 case T_INT:
8884 evpxord(dst, mask, nds, src, merge, vector_len); break;
8885 case T_LONG:
8886 evpxorq(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::evxor(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
8893 switch(type) {
8894 case T_INT:
8895 evpxord(dst, mask, nds, src, merge, vector_len); break;
8896 case T_LONG:
8897 evpxorq(dst, mask, nds, src, merge, vector_len); break;
8898 default:
8899 fatal("Unexpected type argument %s", type2name(type)); break;
8900 }
8901 }
8902
8903 void MacroAssembler::evor(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
8904 switch(type) {
8905 case T_INT:
8906 Assembler::evpord(dst, mask, nds, src, merge, vector_len); break;
8907 case T_LONG:
8908 evporq(dst, mask, nds, src, merge, vector_len); break;
8909 default:
8910 fatal("Unexpected type argument %s", type2name(type)); break;
8911 }
8912 }
8913
8914 void MacroAssembler::evor(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
8915 switch(type) {
8916 case T_INT:
8917 Assembler::evpord(dst, mask, nds, src, merge, vector_len); break;
8918 case T_LONG:
8919 evporq(dst, mask, nds, src, merge, vector_len); break;
8920 default:
8921 fatal("Unexpected type argument %s", type2name(type)); break;
8922 }
8923 }
8924
8925 void MacroAssembler::evand(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, XMMRegister src, bool merge, int vector_len) {
8926 switch(type) {
8927 case T_INT:
8928 evpandd(dst, mask, nds, src, merge, vector_len); break;
8929 case T_LONG:
8930 evpandq(dst, mask, nds, src, merge, vector_len); break;
8931 default:
8932 fatal("Unexpected type argument %s", type2name(type)); break;
8933 }
8934 }
8935
8936 void MacroAssembler::evand(BasicType type, XMMRegister dst, KRegister mask, XMMRegister nds, Address src, bool merge, int vector_len) {
8937 switch(type) {
8938 case T_INT:
8939 evpandd(dst, mask, nds, src, merge, vector_len); break;
8940 case T_LONG:
8941 evpandq(dst, mask, nds, src, merge, vector_len); break;
8942 default:
8943 fatal("Unexpected type argument %s", type2name(type)); break;
8944 }
8945 }
8946
8947 void MacroAssembler::kortest(uint masklen, KRegister src1, KRegister src2) {
8948 switch(masklen) {
8949 case 8:
8950 kortestbl(src1, src2);
8951 break;
8952 case 16:
8953 kortestwl(src1, src2);
8954 break;
8955 case 32:
8956 kortestdl(src1, src2);
8957 break;
8958 case 64:
8959 kortestql(src1, src2);
8960 break;
8961 default:
8962 fatal("Unexpected mask length %d", masklen);
8963 break;
8964 }
8965 }
8966
8967
8968 void MacroAssembler::ktest(uint masklen, KRegister src1, KRegister src2) {
8969 switch(masklen) {
8970 case 8:
8971 ktestbl(src1, src2);
8972 break;
8973 case 16:
8974 ktestwl(src1, src2);
8975 break;
8976 case 32:
8977 ktestdl(src1, src2);
8978 break;
8979 case 64:
8980 ktestql(src1, src2);
8981 break;
8982 default:
8983 fatal("Unexpected mask length %d", masklen);
8984 break;
8985 }
8986 }
8987
8988 void MacroAssembler::evrold(BasicType type, XMMRegister dst, KRegister mask, XMMRegister src, int shift, bool merge, int vlen_enc) {
8989 switch(type) {
8990 case T_INT:
8991 evprold(dst, mask, src, shift, merge, vlen_enc); break;
8992 case T_LONG:
8993 evprolq(dst, mask, src, shift, merge, vlen_enc); break;
8994 default:
8995 fatal("Unexpected type argument %s", type2name(type)); break;
8996 break;
8997 }
8998 }
8999
9000 void MacroAssembler::evrord(BasicType type, XMMRegister dst, KRegister mask, XMMRegister src, int shift, bool merge, int vlen_enc) {
9001 switch(type) {
9002 case T_INT:
9003 evprord(dst, mask, src, shift, merge, vlen_enc); break;
9004 case T_LONG:
9005 evprorq(dst, mask, src, shift, merge, vlen_enc); break;
9006 default:
9007 fatal("Unexpected type argument %s", type2name(type)); break;
9008 }
9009 }
9010
9011 void MacroAssembler::evrold(BasicType type, XMMRegister dst, KRegister mask, XMMRegister src1, XMMRegister src2, bool merge, int vlen_enc) {
9012 switch(type) {
9013 case T_INT:
9014 evprolvd(dst, mask, src1, src2, merge, vlen_enc); break;
9015 case T_LONG:
9016 evprolvq(dst, mask, src1, src2, merge, vlen_enc); break;
9017 default:
9018 fatal("Unexpected type argument %s", type2name(type)); break;
9019 }
9020 }
9021
9022 void MacroAssembler::evrord(BasicType type, XMMRegister dst, KRegister mask, XMMRegister src1, XMMRegister src2, bool merge, int vlen_enc) {
9023 switch(type) {
9024 case T_INT:
9025 evprorvd(dst, mask, src1, src2, merge, vlen_enc); break;
9026 case T_LONG:
9027 evprorvq(dst, mask, src1, src2, merge, vlen_enc); break;
9028 default:
9029 fatal("Unexpected type argument %s", type2name(type)); break;
9030 }
9031 }
9032
9033 void MacroAssembler::evpandq(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
9034 assert(rscratch != noreg || always_reachable(src), "missing");
9035
9036 if (reachable(src)) {
9037 evpandq(dst, nds, as_Address(src), vector_len);
9038 } else {
9039 lea(rscratch, src);
9040 evpandq(dst, nds, Address(rscratch, 0), vector_len);
9041 }
9042 }
9043
9044 void MacroAssembler::evpaddq(XMMRegister dst, KRegister mask, XMMRegister nds, AddressLiteral src, bool merge, int vector_len, Register rscratch) {
9045 assert(rscratch != noreg || always_reachable(src), "missing");
9046
9047 if (reachable(src)) {
9048 Assembler::evpaddq(dst, mask, nds, as_Address(src), merge, vector_len);
9049 } else {
9050 lea(rscratch, src);
9051 Assembler::evpaddq(dst, mask, nds, Address(rscratch, 0), merge, vector_len);
9052 }
9053 }
9054
9055 void MacroAssembler::evporq(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
9056 assert(rscratch != noreg || always_reachable(src), "missing");
9057
9058 if (reachable(src)) {
9059 evporq(dst, nds, as_Address(src), vector_len);
9060 } else {
9061 lea(rscratch, src);
9062 evporq(dst, nds, Address(rscratch, 0), vector_len);
9063 }
9064 }
9065
9066 void MacroAssembler::vpshufb(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
9067 assert(rscratch != noreg || always_reachable(src), "missing");
9068
9069 if (reachable(src)) {
9070 vpshufb(dst, nds, as_Address(src), vector_len);
9071 } else {
9072 lea(rscratch, src);
9073 vpshufb(dst, nds, Address(rscratch, 0), vector_len);
9074 }
9075 }
9076
9077 void MacroAssembler::vpor(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len, Register rscratch) {
9078 assert(rscratch != noreg || always_reachable(src), "missing");
9079
9080 if (reachable(src)) {
9081 Assembler::vpor(dst, nds, as_Address(src), vector_len);
9082 } else {
9083 lea(rscratch, src);
9084 Assembler::vpor(dst, nds, Address(rscratch, 0), vector_len);
9085 }
9086 }
9087
9088 void MacroAssembler::vpternlogq(XMMRegister dst, int imm8, XMMRegister src2, AddressLiteral src3, int vector_len, Register rscratch) {
9089 assert(rscratch != noreg || always_reachable(src3), "missing");
9090
9091 if (reachable(src3)) {
9092 vpternlogq(dst, imm8, src2, as_Address(src3), vector_len);
9093 } else {
9094 lea(rscratch, src3);
9095 vpternlogq(dst, imm8, src2, Address(rscratch, 0), vector_len);
9096 }
9097 }
9098
9099 #if COMPILER2_OR_JVMCI
9100
9101 void MacroAssembler::fill_masked(BasicType bt, Address dst, XMMRegister xmm, KRegister mask,
9102 Register length, Register temp, int vec_enc) {
9103 // Computing mask for predicated vector store.
9104 movptr(temp, -1);
9105 bzhiq(temp, temp, length);
9106 kmov(mask, temp);
9107 evmovdqu(bt, mask, dst, xmm, true, vec_enc);
9108 }
9109
9110 // Set memory operation for length "less than" 64 bytes.
9111 void MacroAssembler::fill64_masked(uint shift, Register dst, int disp,
9112 XMMRegister xmm, KRegister mask, Register length,
9113 Register temp, bool use64byteVector) {
9114 assert(MaxVectorSize >= 32, "vector length should be >= 32");
9115 const BasicType type[] = { T_BYTE, T_SHORT, T_INT, T_LONG};
9116 if (!use64byteVector) {
9117 fill32(dst, disp, xmm);
9118 subptr(length, 32 >> shift);
9119 fill32_masked(shift, dst, disp + 32, xmm, mask, length, temp);
9120 } else {
9121 assert(MaxVectorSize == 64, "vector length != 64");
9122 fill_masked(type[shift], Address(dst, disp), xmm, mask, length, temp, Assembler::AVX_512bit);
9123 }
9124 }
9125
9126
9127 void MacroAssembler::fill32_masked(uint shift, Register dst, int disp,
9128 XMMRegister xmm, KRegister mask, Register length,
9129 Register temp) {
9130 assert(MaxVectorSize >= 32, "vector length should be >= 32");
9131 const BasicType type[] = { T_BYTE, T_SHORT, T_INT, T_LONG};
9132 fill_masked(type[shift], Address(dst, disp), xmm, mask, length, temp, Assembler::AVX_256bit);
9133 }
9134
9135
9136 void MacroAssembler::fill32(Address dst, XMMRegister xmm) {
9137 assert(MaxVectorSize >= 32, "vector length should be >= 32");
9138 vmovdqu(dst, xmm);
9139 }
9140
9141 void MacroAssembler::fill32(Register dst, int disp, XMMRegister xmm) {
9142 fill32(Address(dst, disp), xmm);
9143 }
9144
9145 void MacroAssembler::fill64(Address dst, XMMRegister xmm, bool use64byteVector) {
9146 assert(MaxVectorSize >= 32, "vector length should be >= 32");
9147 if (!use64byteVector) {
9148 fill32(dst, xmm);
9149 fill32(dst.plus_disp(32), xmm);
9150 } else {
9151 evmovdquq(dst, xmm, Assembler::AVX_512bit);
9152 }
9153 }
9154
9155 void MacroAssembler::fill64(Register dst, int disp, XMMRegister xmm, bool use64byteVector) {
9156 fill64(Address(dst, disp), xmm, use64byteVector);
9157 }
9158
9159 void MacroAssembler::generate_fill_avx3(BasicType type, Register to, Register value,
9160 Register count, Register rtmp, XMMRegister xtmp) {
9161 Label L_exit;
9162 Label L_fill_start;
9163 Label L_fill_64_bytes;
9164 Label L_fill_96_bytes;
9165 Label L_fill_128_bytes;
9166 Label L_fill_128_bytes_loop;
9167 Label L_fill_128_loop_header;
9168 Label L_fill_128_bytes_loop_header;
9169 Label L_fill_128_bytes_loop_pre_header;
9170 Label L_fill_zmm_sequence;
9171
9172 int shift = -1;
9173 int avx3threshold = VM_Version::avx3_threshold();
9174 switch(type) {
9175 case T_BYTE: shift = 0;
9176 break;
9177 case T_SHORT: shift = 1;
9178 break;
9179 case T_INT: shift = 2;
9180 break;
9181 /* Uncomment when LONG fill stubs are supported.
9182 case T_LONG: shift = 3;
9183 break;
9184 */
9185 default:
9186 fatal("Unhandled type: %s\n", type2name(type));
9187 }
9188
9189 if ((avx3threshold != 0) || (MaxVectorSize == 32)) {
9190
9191 if (MaxVectorSize == 64) {
9192 cmpq(count, avx3threshold >> shift);
9193 jcc(Assembler::greater, L_fill_zmm_sequence);
9194 }
9195
9196 evpbroadcast(type, xtmp, value, Assembler::AVX_256bit);
9197
9198 bind(L_fill_start);
9199
9200 cmpq(count, 32 >> shift);
9201 jccb(Assembler::greater, L_fill_64_bytes);
9202 fill32_masked(shift, to, 0, xtmp, k2, count, rtmp);
9203 jmp(L_exit);
9204
9205 bind(L_fill_64_bytes);
9206 cmpq(count, 64 >> shift);
9207 jccb(Assembler::greater, L_fill_96_bytes);
9208 fill64_masked(shift, to, 0, xtmp, k2, count, rtmp);
9209 jmp(L_exit);
9210
9211 bind(L_fill_96_bytes);
9212 cmpq(count, 96 >> shift);
9213 jccb(Assembler::greater, L_fill_128_bytes);
9214 fill64(to, 0, xtmp);
9215 subq(count, 64 >> shift);
9216 fill32_masked(shift, to, 64, xtmp, k2, count, rtmp);
9217 jmp(L_exit);
9218
9219 bind(L_fill_128_bytes);
9220 cmpq(count, 128 >> shift);
9221 jccb(Assembler::greater, L_fill_128_bytes_loop_pre_header);
9222 fill64(to, 0, xtmp);
9223 fill32(to, 64, xtmp);
9224 subq(count, 96 >> shift);
9225 fill32_masked(shift, to, 96, xtmp, k2, count, rtmp);
9226 jmp(L_exit);
9227
9228 bind(L_fill_128_bytes_loop_pre_header);
9229 {
9230 mov(rtmp, to);
9231 andq(rtmp, 31);
9232 jccb(Assembler::zero, L_fill_128_bytes_loop_header);
9233 negq(rtmp);
9234 addq(rtmp, 32);
9235 mov64(r8, -1L);
9236 bzhiq(r8, r8, rtmp);
9237 kmovql(k2, r8);
9238 evmovdqu(T_BYTE, k2, Address(to, 0), xtmp, true, Assembler::AVX_256bit);
9239 addq(to, rtmp);
9240 shrq(rtmp, shift);
9241 subq(count, rtmp);
9242 }
9243
9244 cmpq(count, 128 >> shift);
9245 jcc(Assembler::less, L_fill_start);
9246
9247 bind(L_fill_128_bytes_loop_header);
9248 subq(count, 128 >> shift);
9249
9250 align32();
9251 bind(L_fill_128_bytes_loop);
9252 fill64(to, 0, xtmp);
9253 fill64(to, 64, xtmp);
9254 addq(to, 128);
9255 subq(count, 128 >> shift);
9256 jccb(Assembler::greaterEqual, L_fill_128_bytes_loop);
9257
9258 addq(count, 128 >> shift);
9259 jcc(Assembler::zero, L_exit);
9260 jmp(L_fill_start);
9261 }
9262
9263 if (MaxVectorSize == 64) {
9264 // Sequence using 64 byte ZMM register.
9265 Label L_fill_128_bytes_zmm;
9266 Label L_fill_192_bytes_zmm;
9267 Label L_fill_192_bytes_loop_zmm;
9268 Label L_fill_192_bytes_loop_header_zmm;
9269 Label L_fill_192_bytes_loop_pre_header_zmm;
9270 Label L_fill_start_zmm_sequence;
9271
9272 bind(L_fill_zmm_sequence);
9273 evpbroadcast(type, xtmp, value, Assembler::AVX_512bit);
9274
9275 bind(L_fill_start_zmm_sequence);
9276 cmpq(count, 64 >> shift);
9277 jccb(Assembler::greater, L_fill_128_bytes_zmm);
9278 fill64_masked(shift, to, 0, xtmp, k2, count, rtmp, true);
9279 jmp(L_exit);
9280
9281 bind(L_fill_128_bytes_zmm);
9282 cmpq(count, 128 >> shift);
9283 jccb(Assembler::greater, L_fill_192_bytes_zmm);
9284 fill64(to, 0, xtmp, true);
9285 subq(count, 64 >> shift);
9286 fill64_masked(shift, to, 64, xtmp, k2, count, rtmp, true);
9287 jmp(L_exit);
9288
9289 bind(L_fill_192_bytes_zmm);
9290 cmpq(count, 192 >> shift);
9291 jccb(Assembler::greater, L_fill_192_bytes_loop_pre_header_zmm);
9292 fill64(to, 0, xtmp, true);
9293 fill64(to, 64, xtmp, true);
9294 subq(count, 128 >> shift);
9295 fill64_masked(shift, to, 128, xtmp, k2, count, rtmp, true);
9296 jmp(L_exit);
9297
9298 bind(L_fill_192_bytes_loop_pre_header_zmm);
9299 {
9300 movq(rtmp, to);
9301 andq(rtmp, 63);
9302 jccb(Assembler::zero, L_fill_192_bytes_loop_header_zmm);
9303 negq(rtmp);
9304 addq(rtmp, 64);
9305 mov64(r8, -1L);
9306 bzhiq(r8, r8, rtmp);
9307 kmovql(k2, r8);
9308 evmovdqu(T_BYTE, k2, Address(to, 0), xtmp, true, Assembler::AVX_512bit);
9309 addq(to, rtmp);
9310 shrq(rtmp, shift);
9311 subq(count, rtmp);
9312 }
9313
9314 cmpq(count, 192 >> shift);
9315 jcc(Assembler::less, L_fill_start_zmm_sequence);
9316
9317 bind(L_fill_192_bytes_loop_header_zmm);
9318 subq(count, 192 >> shift);
9319
9320 align32();
9321 bind(L_fill_192_bytes_loop_zmm);
9322 fill64(to, 0, xtmp, true);
9323 fill64(to, 64, xtmp, true);
9324 fill64(to, 128, xtmp, true);
9325 addq(to, 192);
9326 subq(count, 192 >> shift);
9327 jccb(Assembler::greaterEqual, L_fill_192_bytes_loop_zmm);
9328
9329 addq(count, 192 >> shift);
9330 jcc(Assembler::zero, L_exit);
9331 jmp(L_fill_start_zmm_sequence);
9332 }
9333 bind(L_exit);
9334 }
9335 #endif //COMPILER2_OR_JVMCI
9336
9337
9338 void MacroAssembler::convert_f2i(Register dst, XMMRegister src) {
9339 Label done;
9340 cvttss2sil(dst, src);
9341 // Conversion instructions do not match JLS for overflow, underflow and NaN -> fixup in stub
9342 cmpl(dst, 0x80000000); // float_sign_flip
9343 jccb(Assembler::notEqual, done);
9344 subptr(rsp, 8);
9345 movflt(Address(rsp, 0), src);
9346 call(RuntimeAddress(CAST_FROM_FN_PTR(address, StubRoutines::x86::f2i_fixup())));
9347 pop(dst);
9348 bind(done);
9349 }
9350
9351 void MacroAssembler::convert_d2i(Register dst, XMMRegister src) {
9352 Label done;
9353 cvttsd2sil(dst, src);
9354 // Conversion instructions do not match JLS for overflow, underflow and NaN -> fixup in stub
9355 cmpl(dst, 0x80000000); // float_sign_flip
9356 jccb(Assembler::notEqual, done);
9357 subptr(rsp, 8);
9358 movdbl(Address(rsp, 0), src);
9359 call(RuntimeAddress(CAST_FROM_FN_PTR(address, StubRoutines::x86::d2i_fixup())));
9360 pop(dst);
9361 bind(done);
9362 }
9363
9364 void MacroAssembler::convert_f2l(Register dst, XMMRegister src) {
9365 Label done;
9366 cvttss2siq(dst, src);
9367 cmp64(dst, ExternalAddress((address) StubRoutines::x86::double_sign_flip()));
9368 jccb(Assembler::notEqual, done);
9369 subptr(rsp, 8);
9370 movflt(Address(rsp, 0), src);
9371 call(RuntimeAddress(CAST_FROM_FN_PTR(address, StubRoutines::x86::f2l_fixup())));
9372 pop(dst);
9373 bind(done);
9374 }
9375
9376 void MacroAssembler::round_float(Register dst, XMMRegister src, Register rtmp, Register rcx) {
9377 // Following code is line by line assembly translation rounding algorithm.
9378 // Please refer to java.lang.Math.round(float) algorithm for details.
9379 const int32_t FloatConsts_EXP_BIT_MASK = 0x7F800000;
9380 const int32_t FloatConsts_SIGNIFICAND_WIDTH = 24;
9381 const int32_t FloatConsts_EXP_BIAS = 127;
9382 const int32_t FloatConsts_SIGNIF_BIT_MASK = 0x007FFFFF;
9383 const int32_t MINUS_32 = 0xFFFFFFE0;
9384 Label L_special_case, L_block1, L_exit;
9385 movl(rtmp, FloatConsts_EXP_BIT_MASK);
9386 movdl(dst, src);
9387 andl(dst, rtmp);
9388 sarl(dst, FloatConsts_SIGNIFICAND_WIDTH - 1);
9389 movl(rtmp, FloatConsts_SIGNIFICAND_WIDTH - 2 + FloatConsts_EXP_BIAS);
9390 subl(rtmp, dst);
9391 movl(rcx, rtmp);
9392 movl(dst, MINUS_32);
9393 testl(rtmp, dst);
9394 jccb(Assembler::notEqual, L_special_case);
9395 movdl(dst, src);
9396 andl(dst, FloatConsts_SIGNIF_BIT_MASK);
9397 orl(dst, FloatConsts_SIGNIF_BIT_MASK + 1);
9398 movdl(rtmp, src);
9399 testl(rtmp, rtmp);
9400 jccb(Assembler::greaterEqual, L_block1);
9401 negl(dst);
9402 bind(L_block1);
9403 sarl(dst);
9404 addl(dst, 0x1);
9405 sarl(dst, 0x1);
9406 jmp(L_exit);
9407 bind(L_special_case);
9408 convert_f2i(dst, src);
9409 bind(L_exit);
9410 }
9411
9412 void MacroAssembler::round_double(Register dst, XMMRegister src, Register rtmp, Register rcx) {
9413 // Following code is line by line assembly translation rounding algorithm.
9414 // Please refer to java.lang.Math.round(double) algorithm for details.
9415 const int64_t DoubleConsts_EXP_BIT_MASK = 0x7FF0000000000000L;
9416 const int64_t DoubleConsts_SIGNIFICAND_WIDTH = 53;
9417 const int64_t DoubleConsts_EXP_BIAS = 1023;
9418 const int64_t DoubleConsts_SIGNIF_BIT_MASK = 0x000FFFFFFFFFFFFFL;
9419 const int64_t MINUS_64 = 0xFFFFFFFFFFFFFFC0L;
9420 Label L_special_case, L_block1, L_exit;
9421 mov64(rtmp, DoubleConsts_EXP_BIT_MASK);
9422 movq(dst, src);
9423 andq(dst, rtmp);
9424 sarq(dst, DoubleConsts_SIGNIFICAND_WIDTH - 1);
9425 mov64(rtmp, DoubleConsts_SIGNIFICAND_WIDTH - 2 + DoubleConsts_EXP_BIAS);
9426 subq(rtmp, dst);
9427 movq(rcx, rtmp);
9428 mov64(dst, MINUS_64);
9429 testq(rtmp, dst);
9430 jccb(Assembler::notEqual, L_special_case);
9431 movq(dst, src);
9432 mov64(rtmp, DoubleConsts_SIGNIF_BIT_MASK);
9433 andq(dst, rtmp);
9434 mov64(rtmp, DoubleConsts_SIGNIF_BIT_MASK + 1);
9435 orq(dst, rtmp);
9436 movq(rtmp, src);
9437 testq(rtmp, rtmp);
9438 jccb(Assembler::greaterEqual, L_block1);
9439 negq(dst);
9440 bind(L_block1);
9441 sarq(dst);
9442 addq(dst, 0x1);
9443 sarq(dst, 0x1);
9444 jmp(L_exit);
9445 bind(L_special_case);
9446 convert_d2l(dst, src);
9447 bind(L_exit);
9448 }
9449
9450 void MacroAssembler::convert_d2l(Register dst, XMMRegister src) {
9451 Label done;
9452 cvttsd2siq(dst, src);
9453 cmp64(dst, ExternalAddress((address) StubRoutines::x86::double_sign_flip()));
9454 jccb(Assembler::notEqual, done);
9455 subptr(rsp, 8);
9456 movdbl(Address(rsp, 0), src);
9457 call(RuntimeAddress(CAST_FROM_FN_PTR(address, StubRoutines::x86::d2l_fixup())));
9458 pop(dst);
9459 bind(done);
9460 }
9461
9462 void MacroAssembler::cache_wb(Address line)
9463 {
9464 // 64 bit cpus always support clflush
9465 assert(VM_Version::supports_clflush(), "clflush should be available");
9466 bool optimized = VM_Version::supports_clflushopt();
9467 bool no_evict = VM_Version::supports_clwb();
9468
9469 // prefer clwb (writeback without evict) otherwise
9470 // prefer clflushopt (potentially parallel writeback with evict)
9471 // otherwise fallback on clflush (serial writeback with evict)
9472
9473 if (optimized) {
9474 if (no_evict) {
9475 clwb(line);
9476 } else {
9477 clflushopt(line);
9478 }
9479 } else {
9480 // no need for fence when using CLFLUSH
9481 clflush(line);
9482 }
9483 }
9484
9485 void MacroAssembler::cache_wbsync(bool is_pre)
9486 {
9487 assert(VM_Version::supports_clflush(), "clflush should be available");
9488 bool optimized = VM_Version::supports_clflushopt();
9489 bool no_evict = VM_Version::supports_clwb();
9490
9491 // pick the correct implementation
9492
9493 if (!is_pre && (optimized || no_evict)) {
9494 // need an sfence for post flush when using clflushopt or clwb
9495 // otherwise no no need for any synchroniaztion
9496
9497 sfence();
9498 }
9499 }
9500
9501 Assembler::Condition MacroAssembler::negate_condition(Assembler::Condition cond) {
9502 switch (cond) {
9503 // Note some conditions are synonyms for others
9504 case Assembler::zero: return Assembler::notZero;
9505 case Assembler::notZero: return Assembler::zero;
9506 case Assembler::less: return Assembler::greaterEqual;
9507 case Assembler::lessEqual: return Assembler::greater;
9508 case Assembler::greater: return Assembler::lessEqual;
9509 case Assembler::greaterEqual: return Assembler::less;
9510 case Assembler::below: return Assembler::aboveEqual;
9511 case Assembler::belowEqual: return Assembler::above;
9512 case Assembler::above: return Assembler::belowEqual;
9513 case Assembler::aboveEqual: return Assembler::below;
9514 case Assembler::overflow: return Assembler::noOverflow;
9515 case Assembler::noOverflow: return Assembler::overflow;
9516 case Assembler::negative: return Assembler::positive;
9517 case Assembler::positive: return Assembler::negative;
9518 case Assembler::parity: return Assembler::noParity;
9519 case Assembler::noParity: return Assembler::parity;
9520 }
9521 ShouldNotReachHere(); return Assembler::overflow;
9522 }
9523
9524 // This is simply a call to Thread::current()
9525 void MacroAssembler::get_thread_slow(Register thread) {
9526 if (thread != rax) {
9527 push(rax);
9528 }
9529 push(rdi);
9530 push(rsi);
9531 push(rdx);
9532 push(rcx);
9533 push(r8);
9534 push(r9);
9535 push(r10);
9536 push(r11);
9537
9538 MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, Thread::current), 0);
9539
9540 pop(r11);
9541 pop(r10);
9542 pop(r9);
9543 pop(r8);
9544 pop(rcx);
9545 pop(rdx);
9546 pop(rsi);
9547 pop(rdi);
9548 if (thread != rax) {
9549 mov(thread, rax);
9550 pop(rax);
9551 }
9552 }
9553
9554 void MacroAssembler::check_stack_alignment(Register sp, const char* msg, unsigned bias, Register tmp) {
9555 Label L_stack_ok;
9556 if (bias == 0) {
9557 testptr(sp, 2 * wordSize - 1);
9558 } else {
9559 // lea(tmp, Address(rsp, bias);
9560 mov(tmp, sp);
9561 addptr(tmp, bias);
9562 testptr(tmp, 2 * wordSize - 1);
9563 }
9564 jcc(Assembler::equal, L_stack_ok);
9565 block_comment(msg);
9566 stop(msg);
9567 bind(L_stack_ok);
9568 }
9569
9570 // Implements lightweight-locking.
9571 //
9572 // obj: the object to be locked
9573 // reg_rax: rax
9574 // thread: the thread which attempts to lock obj
9575 // tmp: a temporary register
9576 void MacroAssembler::lightweight_lock(Register basic_lock, Register obj, Register reg_rax, Register tmp, Label& slow) {
9577 Register thread = r15_thread;
9578
9579 assert(reg_rax == rax, "");
9580 assert_different_registers(basic_lock, obj, reg_rax, thread, tmp);
9581
9582 Label push;
9583 const Register top = tmp;
9584
9585 // Preload the markWord. It is important that this is the first
9586 // instruction emitted as it is part of C1's null check semantics.
9587 movptr(reg_rax, Address(obj, oopDesc::mark_offset_in_bytes()));
9588
9589 if (UseObjectMonitorTable) {
9590 // Clear cache in case fast locking succeeds or we need to take the slow-path.
9591 movptr(Address(basic_lock, BasicObjectLock::lock_offset() + in_ByteSize((BasicLock::object_monitor_cache_offset_in_bytes()))), 0);
9592 }
9593
9594 if (DiagnoseSyncOnValueBasedClasses != 0) {
9595 load_klass(tmp, obj, rscratch1);
9596 testb(Address(tmp, Klass::misc_flags_offset()), KlassFlags::_misc_is_value_based_class);
9597 jcc(Assembler::notZero, slow);
9598 }
9599
9600 // Load top.
9601 movl(top, Address(thread, JavaThread::lock_stack_top_offset()));
9602
9603 // Check if the lock-stack is full.
9604 cmpl(top, LockStack::end_offset());
9605 jcc(Assembler::greaterEqual, slow);
9606
9607 // Check for recursion.
9608 cmpptr(obj, Address(thread, top, Address::times_1, -oopSize));
9609 jcc(Assembler::equal, push);
9610
9611 // Check header for monitor (0b10).
9612 testptr(reg_rax, markWord::monitor_value);
9613 jcc(Assembler::notZero, slow);
9614
9615 // Try to lock. Transition lock bits 0b01 => 0b00
9616 movptr(tmp, reg_rax);
9617 andptr(tmp, ~(int32_t)markWord::unlocked_value);
9618 orptr(reg_rax, markWord::unlocked_value);
9619 lock(); cmpxchgptr(tmp, Address(obj, oopDesc::mark_offset_in_bytes()));
9620 jcc(Assembler::notEqual, slow);
9621
9622 // Restore top, CAS clobbers register.
9623 movl(top, Address(thread, JavaThread::lock_stack_top_offset()));
9624
9625 bind(push);
9626 // After successful lock, push object on lock-stack.
9627 movptr(Address(thread, top), obj);
9628 incrementl(top, oopSize);
9629 movl(Address(thread, JavaThread::lock_stack_top_offset()), top);
9630 }
9631
9632 // Implements lightweight-unlocking.
9633 //
9634 // obj: the object to be unlocked
9635 // reg_rax: rax
9636 // thread: the thread
9637 // tmp: a temporary register
9638 void MacroAssembler::lightweight_unlock(Register obj, Register reg_rax, Register tmp, Label& slow) {
9639 Register thread = r15_thread;
9640
9641 assert(reg_rax == rax, "");
9642 assert_different_registers(obj, reg_rax, thread, tmp);
9643
9644 Label unlocked, push_and_slow;
9645 const Register top = tmp;
9646
9647 // Check if obj is top of lock-stack.
9648 movl(top, Address(thread, JavaThread::lock_stack_top_offset()));
9649 cmpptr(obj, Address(thread, top, Address::times_1, -oopSize));
9650 jcc(Assembler::notEqual, slow);
9651
9652 // Pop lock-stack.
9653 DEBUG_ONLY(movptr(Address(thread, top, Address::times_1, -oopSize), 0);)
9654 subl(Address(thread, JavaThread::lock_stack_top_offset()), oopSize);
9655
9656 // Check if recursive.
9657 cmpptr(obj, Address(thread, top, Address::times_1, -2 * oopSize));
9658 jcc(Assembler::equal, unlocked);
9659
9660 // Not recursive. Check header for monitor (0b10).
9661 movptr(reg_rax, Address(obj, oopDesc::mark_offset_in_bytes()));
9662 testptr(reg_rax, markWord::monitor_value);
9663 jcc(Assembler::notZero, push_and_slow);
9664
9665 #ifdef ASSERT
9666 // Check header not unlocked (0b01).
9667 Label not_unlocked;
9668 testptr(reg_rax, markWord::unlocked_value);
9669 jcc(Assembler::zero, not_unlocked);
9670 stop("lightweight_unlock already unlocked");
9671 bind(not_unlocked);
9672 #endif
9673
9674 // Try to unlock. Transition lock bits 0b00 => 0b01
9675 movptr(tmp, reg_rax);
9676 orptr(tmp, markWord::unlocked_value);
9677 lock(); cmpxchgptr(tmp, Address(obj, oopDesc::mark_offset_in_bytes()));
9678 jcc(Assembler::equal, unlocked);
9679
9680 bind(push_and_slow);
9681 // Restore lock-stack and handle the unlock in runtime.
9682 #ifdef ASSERT
9683 movl(top, Address(thread, JavaThread::lock_stack_top_offset()));
9684 movptr(Address(thread, top), obj);
9685 #endif
9686 addl(Address(thread, JavaThread::lock_stack_top_offset()), oopSize);
9687 jmp(slow);
9688
9689 bind(unlocked);
9690 }
9691
9692 // Saves legacy GPRs state on stack.
9693 void MacroAssembler::save_legacy_gprs() {
9694 subq(rsp, 16 * wordSize);
9695 movq(Address(rsp, 15 * wordSize), rax);
9696 movq(Address(rsp, 14 * wordSize), rcx);
9697 movq(Address(rsp, 13 * wordSize), rdx);
9698 movq(Address(rsp, 12 * wordSize), rbx);
9699 movq(Address(rsp, 10 * wordSize), rbp);
9700 movq(Address(rsp, 9 * wordSize), rsi);
9701 movq(Address(rsp, 8 * wordSize), rdi);
9702 movq(Address(rsp, 7 * wordSize), r8);
9703 movq(Address(rsp, 6 * wordSize), r9);
9704 movq(Address(rsp, 5 * wordSize), r10);
9705 movq(Address(rsp, 4 * wordSize), r11);
9706 movq(Address(rsp, 3 * wordSize), r12);
9707 movq(Address(rsp, 2 * wordSize), r13);
9708 movq(Address(rsp, wordSize), r14);
9709 movq(Address(rsp, 0), r15);
9710 }
9711
9712 // Resotres back legacy GPRs state from stack.
9713 void MacroAssembler::restore_legacy_gprs() {
9714 movq(r15, Address(rsp, 0));
9715 movq(r14, Address(rsp, wordSize));
9716 movq(r13, Address(rsp, 2 * wordSize));
9717 movq(r12, Address(rsp, 3 * wordSize));
9718 movq(r11, Address(rsp, 4 * wordSize));
9719 movq(r10, Address(rsp, 5 * wordSize));
9720 movq(r9, Address(rsp, 6 * wordSize));
9721 movq(r8, Address(rsp, 7 * wordSize));
9722 movq(rdi, Address(rsp, 8 * wordSize));
9723 movq(rsi, Address(rsp, 9 * wordSize));
9724 movq(rbp, Address(rsp, 10 * wordSize));
9725 movq(rbx, Address(rsp, 12 * wordSize));
9726 movq(rdx, Address(rsp, 13 * wordSize));
9727 movq(rcx, Address(rsp, 14 * wordSize));
9728 movq(rax, Address(rsp, 15 * wordSize));
9729 addq(rsp, 16 * wordSize);
9730 }
9731
9732 void MacroAssembler::setcc(Assembler::Condition comparison, Register dst) {
9733 if (VM_Version::supports_apx_f()) {
9734 esetzucc(comparison, dst);
9735 } else {
9736 setb(comparison, dst);
9737 movzbl(dst, dst);
9738 }
9739 }