1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "asm/macroAssembler.hpp"
27 #include "compiler/disassembler.hpp"
28 #include "interpreter/interpreter.hpp"
29 #include "interpreter/interpreterRuntime.hpp"
30 #include "interpreter/interp_masm.hpp"
31 #include "interpreter/templateTable.hpp"
32 #include "memory/universe.hpp"
33 #include "oops/methodData.hpp"
34 #include "oops/objArrayKlass.hpp"
35 #include "oops/oop.inline.hpp"
36 #include "oops/valueKlass.hpp"
37 #include "prims/methodHandles.hpp"
38 #include "runtime/frame.inline.hpp"
39 #include "runtime/safepointMechanism.hpp"
40 #include "runtime/sharedRuntime.hpp"
41 #include "runtime/stubRoutines.hpp"
42 #include "runtime/synchronizer.hpp"
43 #include "utilities/macros.hpp"
44
45 #define __ Disassembler::hook<InterpreterMacroAssembler>(__FILE__, __LINE__, _masm)->
46
47 // Global Register Names
48 static const Register rbcp = LP64_ONLY(r13) NOT_LP64(rsi);
49 static const Register rlocals = LP64_ONLY(r14) NOT_LP64(rdi);
50
51 // Platform-dependent initialization
52 void TemplateTable::pd_initialize() {
53 // No x86 specific initialization
54 }
55
56 // Address Computation: local variables
57 static inline Address iaddress(int n) {
58 return Address(rlocals, Interpreter::local_offset_in_bytes(n));
59 }
60
61 static inline Address laddress(int n) {
62 return iaddress(n + 1);
63 }
64
65 #ifndef _LP64
66 static inline Address haddress(int n) {
67 return iaddress(n + 0);
68 }
69 #endif
70
71 static inline Address faddress(int n) {
72 return iaddress(n);
73 }
74
75 static inline Address daddress(int n) {
76 return laddress(n);
77 }
78
79 static inline Address aaddress(int n) {
80 return iaddress(n);
81 }
82
83 static inline Address iaddress(Register r) {
84 return Address(rlocals, r, Address::times_ptr);
85 }
86
87 static inline Address laddress(Register r) {
88 return Address(rlocals, r, Address::times_ptr, Interpreter::local_offset_in_bytes(1));
89 }
90
91 #ifndef _LP64
92 static inline Address haddress(Register r) {
93 return Address(rlocals, r, Interpreter::stackElementScale(), Interpreter::local_offset_in_bytes(0));
94 }
95 #endif
96
97 static inline Address faddress(Register r) {
98 return iaddress(r);
99 }
100
101 static inline Address daddress(Register r) {
102 return laddress(r);
103 }
104
105 static inline Address aaddress(Register r) {
106 return iaddress(r);
107 }
108
109
110 // expression stack
111 // (Note: Must not use symmetric equivalents at_rsp_m1/2 since they store
112 // data beyond the rsp which is potentially unsafe in an MT environment;
113 // an interrupt may overwrite that data.)
114 static inline Address at_rsp () {
115 return Address(rsp, 0);
116 }
117
118 // At top of Java expression stack which may be different than esp(). It
119 // isn't for category 1 objects.
120 static inline Address at_tos () {
121 return Address(rsp, Interpreter::expr_offset_in_bytes(0));
122 }
123
124 static inline Address at_tos_p1() {
125 return Address(rsp, Interpreter::expr_offset_in_bytes(1));
126 }
127
128 static inline Address at_tos_p2() {
129 return Address(rsp, Interpreter::expr_offset_in_bytes(2));
130 }
131
132 // Condition conversion
133 static Assembler::Condition j_not(TemplateTable::Condition cc) {
134 switch (cc) {
135 case TemplateTable::equal : return Assembler::notEqual;
136 case TemplateTable::not_equal : return Assembler::equal;
137 case TemplateTable::less : return Assembler::greaterEqual;
138 case TemplateTable::less_equal : return Assembler::greater;
139 case TemplateTable::greater : return Assembler::lessEqual;
140 case TemplateTable::greater_equal: return Assembler::less;
141 }
142 ShouldNotReachHere();
143 return Assembler::zero;
144 }
145
146
147
148 // Miscelaneous helper routines
149 // Store an oop (or NULL) at the address described by obj.
150 // If val == noreg this means store a NULL
151
152
153 static void do_oop_store(InterpreterMacroAssembler* _masm,
154 Address dst,
155 Register val,
156 DecoratorSet decorators = 0) {
157 assert(val == noreg || val == rax, "parameter is just for looks");
158 __ store_heap_oop(dst, val, rdx, rbx, noreg, decorators);
159 }
160
161 static void do_oop_load(InterpreterMacroAssembler* _masm,
162 Address src,
163 Register dst,
164 DecoratorSet decorators = 0) {
165 __ load_heap_oop(dst, src, rdx, rbx, decorators);
166 }
167
168 Address TemplateTable::at_bcp(int offset) {
169 assert(_desc->uses_bcp(), "inconsistent uses_bcp information");
170 return Address(rbcp, offset);
171 }
172
173
174 void TemplateTable::patch_bytecode(Bytecodes::Code bc, Register bc_reg,
175 Register temp_reg, bool load_bc_into_bc_reg/*=true*/,
176 int byte_no) {
177 if (!RewriteBytecodes) return;
178 Label L_patch_done;
179
180 switch (bc) {
181 case Bytecodes::_fast_qputfield:
182 case Bytecodes::_fast_aputfield:
183 case Bytecodes::_fast_bputfield:
184 case Bytecodes::_fast_zputfield:
185 case Bytecodes::_fast_cputfield:
186 case Bytecodes::_fast_dputfield:
187 case Bytecodes::_fast_fputfield:
188 case Bytecodes::_fast_iputfield:
189 case Bytecodes::_fast_lputfield:
190 case Bytecodes::_fast_sputfield:
191 {
192 // We skip bytecode quickening for putfield instructions when
193 // the put_code written to the constant pool cache is zero.
194 // This is required so that every execution of this instruction
195 // calls out to InterpreterRuntime::resolve_get_put to do
196 // additional, required work.
197 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");
198 assert(load_bc_into_bc_reg, "we use bc_reg as temp");
199 __ get_cache_and_index_and_bytecode_at_bcp(temp_reg, bc_reg, temp_reg, byte_no, 1);
200 __ movl(bc_reg, bc);
201 __ cmpl(temp_reg, (int) 0);
202 __ jcc(Assembler::zero, L_patch_done); // don't patch
203 }
204 break;
205 default:
206 assert(byte_no == -1, "sanity");
207 // the pair bytecodes have already done the load.
208 if (load_bc_into_bc_reg) {
209 __ movl(bc_reg, bc);
210 }
211 }
212
213 if (JvmtiExport::can_post_breakpoint()) {
214 Label L_fast_patch;
215 // if a breakpoint is present we can't rewrite the stream directly
216 __ movzbl(temp_reg, at_bcp(0));
217 __ cmpl(temp_reg, Bytecodes::_breakpoint);
218 __ jcc(Assembler::notEqual, L_fast_patch);
219 __ get_method(temp_reg);
220 // Let breakpoint table handling rewrite to quicker bytecode
221 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::set_original_bytecode_at), temp_reg, rbcp, bc_reg);
222 #ifndef ASSERT
223 __ jmpb(L_patch_done);
224 #else
225 __ jmp(L_patch_done);
226 #endif
227 __ bind(L_fast_patch);
228 }
229
230 #ifdef ASSERT
231 Label L_okay;
232 __ load_unsigned_byte(temp_reg, at_bcp(0));
233 __ cmpl(temp_reg, (int) Bytecodes::java_code(bc));
234 __ jcc(Assembler::equal, L_okay);
235 __ cmpl(temp_reg, bc_reg);
236 __ jcc(Assembler::equal, L_okay);
237 __ stop("patching the wrong bytecode");
238 __ bind(L_okay);
239 #endif
240
241 // patch bytecode
242 __ movb(at_bcp(0), bc_reg);
243 __ bind(L_patch_done);
244 }
245 // Individual instructions
246
247
248 void TemplateTable::nop() {
249 transition(vtos, vtos);
250 // nothing to do
251 }
252
253 void TemplateTable::shouldnotreachhere() {
254 transition(vtos, vtos);
255 __ stop("shouldnotreachhere bytecode");
256 }
257
258 void TemplateTable::aconst_null() {
259 transition(vtos, atos);
260 __ xorl(rax, rax);
261 }
262
263 void TemplateTable::iconst(int value) {
264 transition(vtos, itos);
265 if (value == 0) {
266 __ xorl(rax, rax);
267 } else {
268 __ movl(rax, value);
269 }
270 }
271
272 void TemplateTable::lconst(int value) {
273 transition(vtos, ltos);
274 if (value == 0) {
275 __ xorl(rax, rax);
276 } else {
277 __ movl(rax, value);
278 }
279 #ifndef _LP64
280 assert(value >= 0, "check this code");
281 __ xorptr(rdx, rdx);
282 #endif
283 }
284
285
286
287 void TemplateTable::fconst(int value) {
288 transition(vtos, ftos);
289 if (UseSSE >= 1) {
290 static float one = 1.0f, two = 2.0f;
291 switch (value) {
292 case 0:
293 __ xorps(xmm0, xmm0);
294 break;
295 case 1:
296 __ movflt(xmm0, ExternalAddress((address) &one));
297 break;
298 case 2:
299 __ movflt(xmm0, ExternalAddress((address) &two));
300 break;
301 default:
302 ShouldNotReachHere();
303 break;
304 }
305 } else {
306 #ifdef _LP64
307 ShouldNotReachHere();
308 #else
309 if (value == 0) { __ fldz();
310 } else if (value == 1) { __ fld1();
311 } else if (value == 2) { __ fld1(); __ fld1(); __ faddp(); // should do a better solution here
312 } else { ShouldNotReachHere();
313 }
314 #endif // _LP64
315 }
316 }
317
318 void TemplateTable::dconst(int value) {
319 transition(vtos, dtos);
320 if (UseSSE >= 2) {
321 static double one = 1.0;
322 switch (value) {
323 case 0:
324 __ xorpd(xmm0, xmm0);
325 break;
326 case 1:
327 __ movdbl(xmm0, ExternalAddress((address) &one));
328 break;
329 default:
330 ShouldNotReachHere();
331 break;
332 }
333 } else {
334 #ifdef _LP64
335 ShouldNotReachHere();
336 #else
337 if (value == 0) { __ fldz();
338 } else if (value == 1) { __ fld1();
339 } else { ShouldNotReachHere();
340 }
341 #endif
342 }
343 }
344
345 void TemplateTable::bipush() {
346 transition(vtos, itos);
347 __ load_signed_byte(rax, at_bcp(1));
348 }
349
350 void TemplateTable::sipush() {
351 transition(vtos, itos);
352 __ load_unsigned_short(rax, at_bcp(1));
353 __ bswapl(rax);
354 __ sarl(rax, 16);
355 }
356
357 void TemplateTable::ldc(bool wide) {
358 transition(vtos, vtos);
359 Register rarg = NOT_LP64(rcx) LP64_ONLY(c_rarg1);
360 Label call_ldc, notFloat, notClass, notInt, Done;
361
362 if (wide) {
363 __ get_unsigned_2_byte_index_at_bcp(rbx, 1);
364 } else {
365 __ load_unsigned_byte(rbx, at_bcp(1));
366 }
367
368 __ get_cpool_and_tags(rcx, rax);
369 const int base_offset = ConstantPool::header_size() * wordSize;
370 const int tags_offset = Array<u1>::base_offset_in_bytes();
371
372 // get type
373 __ movzbl(rdx, Address(rax, rbx, Address::times_1, tags_offset));
374 __ andl(rdx, ~JVM_CONSTANT_QDescBit);
375
376 // unresolved class - get the resolved class
377 __ cmpl(rdx, JVM_CONSTANT_UnresolvedClass);
378 __ jccb(Assembler::equal, call_ldc);
379
380 // unresolved class in error state - call into runtime to throw the error
381 // from the first resolution attempt
382 __ cmpl(rdx, JVM_CONSTANT_UnresolvedClassInError);
383 __ jccb(Assembler::equal, call_ldc);
384
385 // resolved class - need to call vm to get java mirror of the class
386 __ cmpl(rdx, JVM_CONSTANT_Class);
387 __ jcc(Assembler::notEqual, notClass);
388
389 __ bind(call_ldc);
390
391 __ movl(rarg, wide);
392 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::ldc), rarg);
393
394 __ push(atos);
395 __ jmp(Done);
396
397 __ bind(notClass);
398 __ cmpl(rdx, JVM_CONSTANT_Float);
399 __ jccb(Assembler::notEqual, notFloat);
400
401 // ftos
402 __ load_float(Address(rcx, rbx, Address::times_ptr, base_offset));
403 __ push(ftos);
404 __ jmp(Done);
405
406 __ bind(notFloat);
407 __ cmpl(rdx, JVM_CONSTANT_Integer);
408 __ jccb(Assembler::notEqual, notInt);
409
410 // itos
411 __ movl(rax, Address(rcx, rbx, Address::times_ptr, base_offset));
412 __ push(itos);
413 __ jmp(Done);
414
415 // assume the tag is for condy; if not, the VM runtime will tell us
416 __ bind(notInt);
417 condy_helper(Done);
418
419 __ bind(Done);
420 }
421
422 // Fast path for caching oop constants.
423 void TemplateTable::fast_aldc(bool wide) {
424 transition(vtos, atos);
425
426 Register result = rax;
427 Register tmp = rdx;
428 Register rarg = NOT_LP64(rcx) LP64_ONLY(c_rarg1);
429 int index_size = wide ? sizeof(u2) : sizeof(u1);
430
431 Label resolved;
432
433 // We are resolved if the resolved reference cache entry contains a
434 // non-null object (String, MethodType, etc.)
435 assert_different_registers(result, tmp);
436 __ get_cache_index_at_bcp(tmp, 1, index_size);
437 __ load_resolved_reference_at_index(result, tmp);
438 __ testptr(result, result);
439 __ jcc(Assembler::notZero, resolved);
440
441 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc);
442
443 // first time invocation - must resolve first
444 __ movl(rarg, (int)bytecode());
445 __ call_VM(result, entry, rarg);
446 __ bind(resolved);
447
448 { // Check for the null sentinel.
449 // If we just called the VM, it already did the mapping for us,
450 // but it's harmless to retry.
451 Label notNull;
452 ExternalAddress null_sentinel((address)Universe::the_null_sentinel_addr());
453 __ movptr(tmp, null_sentinel);
454 __ cmpoop(tmp, result);
455 __ jccb(Assembler::notEqual, notNull);
456 __ xorptr(result, result); // NULL object reference
457 __ bind(notNull);
458 }
459
460 if (VerifyOops) {
461 __ verify_oop(result);
462 }
463 }
464
465 void TemplateTable::ldc2_w() {
466 transition(vtos, vtos);
467 Label notDouble, notLong, Done;
468 __ get_unsigned_2_byte_index_at_bcp(rbx, 1);
469
470 __ get_cpool_and_tags(rcx, rax);
471 const int base_offset = ConstantPool::header_size() * wordSize;
472 const int tags_offset = Array<u1>::base_offset_in_bytes();
473
474 // get type
475 __ movzbl(rdx, Address(rax, rbx, Address::times_1, tags_offset));
476 __ cmpl(rdx, JVM_CONSTANT_Double);
477 __ jccb(Assembler::notEqual, notDouble);
478
479 // dtos
480 __ load_double(Address(rcx, rbx, Address::times_ptr, base_offset));
481 __ push(dtos);
482
483 __ jmp(Done);
484 __ bind(notDouble);
485 __ cmpl(rdx, JVM_CONSTANT_Long);
486 __ jccb(Assembler::notEqual, notLong);
487
488 // ltos
489 __ movptr(rax, Address(rcx, rbx, Address::times_ptr, base_offset + 0 * wordSize));
490 NOT_LP64(__ movptr(rdx, Address(rcx, rbx, Address::times_ptr, base_offset + 1 * wordSize)));
491 __ push(ltos);
492 __ jmp(Done);
493
494 __ bind(notLong);
495 condy_helper(Done);
496
497 __ bind(Done);
498 }
499
500 void TemplateTable::condy_helper(Label& Done) {
501 const Register obj = rax;
502 const Register off = rbx;
503 const Register flags = rcx;
504 const Register rarg = NOT_LP64(rcx) LP64_ONLY(c_rarg1);
505 __ movl(rarg, (int)bytecode());
506 call_VM(obj, CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc), rarg);
507 #ifndef _LP64
508 // borrow rdi from locals
509 __ get_thread(rdi);
510 __ get_vm_result_2(flags, rdi);
511 __ restore_locals();
512 #else
513 __ get_vm_result_2(flags, r15_thread);
514 #endif
515 // VMr = obj = base address to find primitive value to push
516 // VMr2 = flags = (tos, off) using format of CPCE::_flags
517 __ movl(off, flags);
518 __ andl(off, ConstantPoolCacheEntry::field_index_mask);
519 const Address field(obj, off, Address::times_1, 0*wordSize);
520
521 // What sort of thing are we loading?
522 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift);
523 __ andl(flags, ConstantPoolCacheEntry::tos_state_mask);
524
525 switch (bytecode()) {
526 case Bytecodes::_ldc:
527 case Bytecodes::_ldc_w:
528 {
529 // tos in (itos, ftos, stos, btos, ctos, ztos)
530 Label notInt, notFloat, notShort, notByte, notChar, notBool;
531 __ cmpl(flags, itos);
532 __ jcc(Assembler::notEqual, notInt);
533 // itos
534 __ movl(rax, field);
535 __ push(itos);
536 __ jmp(Done);
537
538 __ bind(notInt);
539 __ cmpl(flags, ftos);
540 __ jcc(Assembler::notEqual, notFloat);
541 // ftos
542 __ load_float(field);
543 __ push(ftos);
544 __ jmp(Done);
545
546 __ bind(notFloat);
547 __ cmpl(flags, stos);
548 __ jcc(Assembler::notEqual, notShort);
549 // stos
550 __ load_signed_short(rax, field);
551 __ push(stos);
552 __ jmp(Done);
553
554 __ bind(notShort);
555 __ cmpl(flags, btos);
556 __ jcc(Assembler::notEqual, notByte);
557 // btos
558 __ load_signed_byte(rax, field);
559 __ push(btos);
560 __ jmp(Done);
561
562 __ bind(notByte);
563 __ cmpl(flags, ctos);
564 __ jcc(Assembler::notEqual, notChar);
565 // ctos
566 __ load_unsigned_short(rax, field);
567 __ push(ctos);
568 __ jmp(Done);
569
570 __ bind(notChar);
571 __ cmpl(flags, ztos);
572 __ jcc(Assembler::notEqual, notBool);
573 // ztos
574 __ load_signed_byte(rax, field);
575 __ push(ztos);
576 __ jmp(Done);
577
578 __ bind(notBool);
579 break;
580 }
581
582 case Bytecodes::_ldc2_w:
583 {
584 Label notLong, notDouble;
585 __ cmpl(flags, ltos);
586 __ jcc(Assembler::notEqual, notLong);
587 // ltos
588 // Loading high word first because movptr clobbers rax
589 NOT_LP64(__ movptr(rdx, field.plus_disp(4)));
590 __ movptr(rax, field);
591 __ push(ltos);
592 __ jmp(Done);
593
594 __ bind(notLong);
595 __ cmpl(flags, dtos);
596 __ jcc(Assembler::notEqual, notDouble);
597 // dtos
598 __ load_double(field);
599 __ push(dtos);
600 __ jmp(Done);
601
602 __ bind(notDouble);
603 break;
604 }
605
606 default:
607 ShouldNotReachHere();
608 }
609
610 __ stop("bad ldc/condy");
611 }
612
613 void TemplateTable::locals_index(Register reg, int offset) {
614 __ load_unsigned_byte(reg, at_bcp(offset));
615 __ negptr(reg);
616 }
617
618 void TemplateTable::iload() {
619 iload_internal();
620 }
621
622 void TemplateTable::nofast_iload() {
623 iload_internal(may_not_rewrite);
624 }
625
626 void TemplateTable::iload_internal(RewriteControl rc) {
627 transition(vtos, itos);
628 if (RewriteFrequentPairs && rc == may_rewrite) {
629 Label rewrite, done;
630 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
631 LP64_ONLY(assert(rbx != bc, "register damaged"));
632
633 // get next byte
634 __ load_unsigned_byte(rbx,
635 at_bcp(Bytecodes::length_for(Bytecodes::_iload)));
636 // if _iload, wait to rewrite to iload2. We only want to rewrite the
637 // last two iloads in a pair. Comparing against fast_iload means that
638 // the next bytecode is neither an iload or a caload, and therefore
639 // an iload pair.
640 __ cmpl(rbx, Bytecodes::_iload);
641 __ jcc(Assembler::equal, done);
642
643 __ cmpl(rbx, Bytecodes::_fast_iload);
644 __ movl(bc, Bytecodes::_fast_iload2);
645
646 __ jccb(Assembler::equal, rewrite);
647
648 // if _caload, rewrite to fast_icaload
649 __ cmpl(rbx, Bytecodes::_caload);
650 __ movl(bc, Bytecodes::_fast_icaload);
651 __ jccb(Assembler::equal, rewrite);
652
653 // rewrite so iload doesn't check again.
654 __ movl(bc, Bytecodes::_fast_iload);
655
656 // rewrite
657 // bc: fast bytecode
658 __ bind(rewrite);
659 patch_bytecode(Bytecodes::_iload, bc, rbx, false);
660 __ bind(done);
661 }
662
663 // Get the local value into tos
664 locals_index(rbx);
665 __ movl(rax, iaddress(rbx));
666 }
667
668 void TemplateTable::fast_iload2() {
669 transition(vtos, itos);
670 locals_index(rbx);
671 __ movl(rax, iaddress(rbx));
672 __ push(itos);
673 locals_index(rbx, 3);
674 __ movl(rax, iaddress(rbx));
675 }
676
677 void TemplateTable::fast_iload() {
678 transition(vtos, itos);
679 locals_index(rbx);
680 __ movl(rax, iaddress(rbx));
681 }
682
683 void TemplateTable::lload() {
684 transition(vtos, ltos);
685 locals_index(rbx);
686 __ movptr(rax, laddress(rbx));
687 NOT_LP64(__ movl(rdx, haddress(rbx)));
688 }
689
690 void TemplateTable::fload() {
691 transition(vtos, ftos);
692 locals_index(rbx);
693 __ load_float(faddress(rbx));
694 }
695
696 void TemplateTable::dload() {
697 transition(vtos, dtos);
698 locals_index(rbx);
699 __ load_double(daddress(rbx));
700 }
701
702 void TemplateTable::aload() {
703 transition(vtos, atos);
704 locals_index(rbx);
705 __ movptr(rax, aaddress(rbx));
706 }
707
708 void TemplateTable::locals_index_wide(Register reg) {
709 __ load_unsigned_short(reg, at_bcp(2));
710 __ bswapl(reg);
711 __ shrl(reg, 16);
712 __ negptr(reg);
713 }
714
715 void TemplateTable::wide_iload() {
716 transition(vtos, itos);
717 locals_index_wide(rbx);
718 __ movl(rax, iaddress(rbx));
719 }
720
721 void TemplateTable::wide_lload() {
722 transition(vtos, ltos);
723 locals_index_wide(rbx);
724 __ movptr(rax, laddress(rbx));
725 NOT_LP64(__ movl(rdx, haddress(rbx)));
726 }
727
728 void TemplateTable::wide_fload() {
729 transition(vtos, ftos);
730 locals_index_wide(rbx);
731 __ load_float(faddress(rbx));
732 }
733
734 void TemplateTable::wide_dload() {
735 transition(vtos, dtos);
736 locals_index_wide(rbx);
737 __ load_double(daddress(rbx));
738 }
739
740 void TemplateTable::wide_aload() {
741 transition(vtos, atos);
742 locals_index_wide(rbx);
743 __ movptr(rax, aaddress(rbx));
744 }
745
746 void TemplateTable::index_check(Register array, Register index) {
747 // Pop ptr into array
748 __ pop_ptr(array);
749 index_check_without_pop(array, index);
750 }
751
752 void TemplateTable::index_check_without_pop(Register array, Register index) {
753 // destroys rbx
754 // check array
755 __ null_check(array, arrayOopDesc::length_offset_in_bytes());
756 // sign extend index for use by indexed load
757 __ movl2ptr(index, index);
758 // check index
759 __ cmpl(index, Address(array, arrayOopDesc::length_offset_in_bytes()));
760 if (index != rbx) {
761 // ??? convention: move aberrant index into rbx for exception message
762 assert(rbx != array, "different registers");
763 __ movl(rbx, index);
764 }
765 Label skip;
766 __ jccb(Assembler::below, skip);
767 // Pass array to create more detailed exceptions.
768 __ mov(NOT_LP64(rax) LP64_ONLY(c_rarg1), array);
769 __ jump(ExternalAddress(Interpreter::_throw_ArrayIndexOutOfBoundsException_entry));
770 __ bind(skip);
771 }
772
773 void TemplateTable::iaload() {
774 transition(itos, itos);
775 // rax: index
776 // rdx: array
777 index_check(rdx, rax); // kills rbx
778 __ access_load_at(T_INT, IN_HEAP | IS_ARRAY, rax,
779 Address(rdx, rax, Address::times_4,
780 arrayOopDesc::base_offset_in_bytes(T_INT)),
781 noreg, noreg);
782 }
783
784 void TemplateTable::laload() {
785 transition(itos, ltos);
786 // rax: index
787 // rdx: array
788 index_check(rdx, rax); // kills rbx
789 NOT_LP64(__ mov(rbx, rax));
790 // rbx,: index
791 __ access_load_at(T_LONG, IN_HEAP | IS_ARRAY, noreg /* ltos */,
792 Address(rdx, rbx, Address::times_8,
793 arrayOopDesc::base_offset_in_bytes(T_LONG)),
794 noreg, noreg);
795 }
796
797
798
799 void TemplateTable::faload() {
800 transition(itos, ftos);
801 // rax: index
802 // rdx: array
803 index_check(rdx, rax); // kills rbx
804 __ access_load_at(T_FLOAT, IN_HEAP | IS_ARRAY, noreg /* ftos */,
805 Address(rdx, rax,
806 Address::times_4,
807 arrayOopDesc::base_offset_in_bytes(T_FLOAT)),
808 noreg, noreg);
809 }
810
811 void TemplateTable::daload() {
812 transition(itos, dtos);
813 // rax: index
814 // rdx: array
815 index_check(rdx, rax); // kills rbx
816 __ access_load_at(T_DOUBLE, IN_HEAP | IS_ARRAY, noreg /* dtos */,
817 Address(rdx, rax,
818 Address::times_8,
819 arrayOopDesc::base_offset_in_bytes(T_DOUBLE)),
820 noreg, noreg);
821 }
822
823 void TemplateTable::aaload() {
824 transition(itos, atos);
825
826 Register array = rcx;
827 Register index = rax;
828
829 index_check(array, index); // kills rbx
830
831 __ profile_array(rbx, array, rdx);
832
833 if (ValueArrayFlatten) {
834 Label is_flat_array, done;
835 __ test_flattened_array_oop(array, rbx, is_flat_array);
836 do_oop_load(_masm,
837 Address(array, index,
838 UseCompressedOops ? Address::times_4 : Address::times_ptr,
839 arrayOopDesc::base_offset_in_bytes(T_OBJECT)),
840 rax,
841 IS_ARRAY);
842 __ jmp(done);
843 __ bind(is_flat_array);
844 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::value_array_load), array, index);
845 __ bind(done);
846 } else {
847 do_oop_load(_masm,
848 Address(array, index,
849 UseCompressedOops ? Address::times_4 : Address::times_ptr,
850 arrayOopDesc::base_offset_in_bytes(T_OBJECT)),
851 rax,
852 IS_ARRAY);
853 }
854
855 __ profile_element(rbx, rax, rdx);
856 }
857
858 void TemplateTable::baload() {
859 transition(itos, itos);
860 // rax: index
861 // rdx: array
862 index_check(rdx, rax); // kills rbx
863 __ access_load_at(T_BYTE, IN_HEAP | IS_ARRAY, rax,
864 Address(rdx, rax, Address::times_1, arrayOopDesc::base_offset_in_bytes(T_BYTE)),
865 noreg, noreg);
866 }
867
868 void TemplateTable::caload() {
869 transition(itos, itos);
870 // rax: index
871 // rdx: array
872 index_check(rdx, rax); // kills rbx
873 __ access_load_at(T_CHAR, IN_HEAP | IS_ARRAY, rax,
874 Address(rdx, rax, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR)),
875 noreg, noreg);
876 }
877
878 // iload followed by caload frequent pair
879 void TemplateTable::fast_icaload() {
880 transition(vtos, itos);
881 // load index out of locals
882 locals_index(rbx);
883 __ movl(rax, iaddress(rbx));
884
885 // rax: index
886 // rdx: array
887 index_check(rdx, rax); // kills rbx
888 __ access_load_at(T_CHAR, IN_HEAP | IS_ARRAY, rax,
889 Address(rdx, rax, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR)),
890 noreg, noreg);
891 }
892
893
894 void TemplateTable::saload() {
895 transition(itos, itos);
896 // rax: index
897 // rdx: array
898 index_check(rdx, rax); // kills rbx
899 __ access_load_at(T_SHORT, IN_HEAP | IS_ARRAY, rax,
900 Address(rdx, rax, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_SHORT)),
901 noreg, noreg);
902 }
903
904 void TemplateTable::iload(int n) {
905 transition(vtos, itos);
906 __ movl(rax, iaddress(n));
907 }
908
909 void TemplateTable::lload(int n) {
910 transition(vtos, ltos);
911 __ movptr(rax, laddress(n));
912 NOT_LP64(__ movptr(rdx, haddress(n)));
913 }
914
915 void TemplateTable::fload(int n) {
916 transition(vtos, ftos);
917 __ load_float(faddress(n));
918 }
919
920 void TemplateTable::dload(int n) {
921 transition(vtos, dtos);
922 __ load_double(daddress(n));
923 }
924
925 void TemplateTable::aload(int n) {
926 transition(vtos, atos);
927 __ movptr(rax, aaddress(n));
928 }
929
930 void TemplateTable::aload_0() {
931 aload_0_internal();
932 }
933
934 void TemplateTable::nofast_aload_0() {
935 aload_0_internal(may_not_rewrite);
936 }
937
938 void TemplateTable::aload_0_internal(RewriteControl rc) {
939 transition(vtos, atos);
940 // According to bytecode histograms, the pairs:
941 //
942 // _aload_0, _fast_igetfield
943 // _aload_0, _fast_agetfield
944 // _aload_0, _fast_fgetfield
945 //
946 // occur frequently. If RewriteFrequentPairs is set, the (slow)
947 // _aload_0 bytecode checks if the next bytecode is either
948 // _fast_igetfield, _fast_agetfield or _fast_fgetfield and then
949 // rewrites the current bytecode into a pair bytecode; otherwise it
950 // rewrites the current bytecode into _fast_aload_0 that doesn't do
951 // the pair check anymore.
952 //
953 // Note: If the next bytecode is _getfield, the rewrite must be
954 // delayed, otherwise we may miss an opportunity for a pair.
955 //
956 // Also rewrite frequent pairs
957 // aload_0, aload_1
958 // aload_0, iload_1
959 // These bytecodes with a small amount of code are most profitable
960 // to rewrite
961 if (RewriteFrequentPairs && rc == may_rewrite) {
962 Label rewrite, done;
963
964 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
965 LP64_ONLY(assert(rbx != bc, "register damaged"));
966
967 // get next byte
968 __ load_unsigned_byte(rbx, at_bcp(Bytecodes::length_for(Bytecodes::_aload_0)));
969
970 // if _getfield then wait with rewrite
971 __ cmpl(rbx, Bytecodes::_getfield);
972 __ jcc(Assembler::equal, done);
973
974 // if _igetfield then rewrite to _fast_iaccess_0
975 assert(Bytecodes::java_code(Bytecodes::_fast_iaccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
976 __ cmpl(rbx, Bytecodes::_fast_igetfield);
977 __ movl(bc, Bytecodes::_fast_iaccess_0);
978 __ jccb(Assembler::equal, rewrite);
979
980 // if _agetfield then rewrite to _fast_aaccess_0
981 assert(Bytecodes::java_code(Bytecodes::_fast_aaccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
982 __ cmpl(rbx, Bytecodes::_fast_agetfield);
983 __ movl(bc, Bytecodes::_fast_aaccess_0);
984 __ jccb(Assembler::equal, rewrite);
985
986 // if _fgetfield then rewrite to _fast_faccess_0
987 assert(Bytecodes::java_code(Bytecodes::_fast_faccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
988 __ cmpl(rbx, Bytecodes::_fast_fgetfield);
989 __ movl(bc, Bytecodes::_fast_faccess_0);
990 __ jccb(Assembler::equal, rewrite);
991
992 // else rewrite to _fast_aload0
993 assert(Bytecodes::java_code(Bytecodes::_fast_aload_0) == Bytecodes::_aload_0, "fix bytecode definition");
994 __ movl(bc, Bytecodes::_fast_aload_0);
995
996 // rewrite
997 // bc: fast bytecode
998 __ bind(rewrite);
999 patch_bytecode(Bytecodes::_aload_0, bc, rbx, false);
1000
1001 __ bind(done);
1002 }
1003
1004 // Do actual aload_0 (must do this after patch_bytecode which might call VM and GC might change oop).
1005 aload(0);
1006 }
1007
1008 void TemplateTable::istore() {
1009 transition(itos, vtos);
1010 locals_index(rbx);
1011 __ movl(iaddress(rbx), rax);
1012 }
1013
1014
1015 void TemplateTable::lstore() {
1016 transition(ltos, vtos);
1017 locals_index(rbx);
1018 __ movptr(laddress(rbx), rax);
1019 NOT_LP64(__ movptr(haddress(rbx), rdx));
1020 }
1021
1022 void TemplateTable::fstore() {
1023 transition(ftos, vtos);
1024 locals_index(rbx);
1025 __ store_float(faddress(rbx));
1026 }
1027
1028 void TemplateTable::dstore() {
1029 transition(dtos, vtos);
1030 locals_index(rbx);
1031 __ store_double(daddress(rbx));
1032 }
1033
1034 void TemplateTable::astore() {
1035 transition(vtos, vtos);
1036 __ pop_ptr(rax);
1037 locals_index(rbx);
1038 __ movptr(aaddress(rbx), rax);
1039 }
1040
1041 void TemplateTable::wide_istore() {
1042 transition(vtos, vtos);
1043 __ pop_i();
1044 locals_index_wide(rbx);
1045 __ movl(iaddress(rbx), rax);
1046 }
1047
1048 void TemplateTable::wide_lstore() {
1049 transition(vtos, vtos);
1050 NOT_LP64(__ pop_l(rax, rdx));
1051 LP64_ONLY(__ pop_l());
1052 locals_index_wide(rbx);
1053 __ movptr(laddress(rbx), rax);
1054 NOT_LP64(__ movl(haddress(rbx), rdx));
1055 }
1056
1057 void TemplateTable::wide_fstore() {
1058 #ifdef _LP64
1059 transition(vtos, vtos);
1060 __ pop_f(xmm0);
1061 locals_index_wide(rbx);
1062 __ movflt(faddress(rbx), xmm0);
1063 #else
1064 wide_istore();
1065 #endif
1066 }
1067
1068 void TemplateTable::wide_dstore() {
1069 #ifdef _LP64
1070 transition(vtos, vtos);
1071 __ pop_d(xmm0);
1072 locals_index_wide(rbx);
1073 __ movdbl(daddress(rbx), xmm0);
1074 #else
1075 wide_lstore();
1076 #endif
1077 }
1078
1079 void TemplateTable::wide_astore() {
1080 transition(vtos, vtos);
1081 __ pop_ptr(rax);
1082 locals_index_wide(rbx);
1083 __ movptr(aaddress(rbx), rax);
1084 }
1085
1086 void TemplateTable::iastore() {
1087 transition(itos, vtos);
1088 __ pop_i(rbx);
1089 // rax: value
1090 // rbx: index
1091 // rdx: array
1092 index_check(rdx, rbx); // prefer index in rbx
1093 __ access_store_at(T_INT, IN_HEAP | IS_ARRAY,
1094 Address(rdx, rbx, Address::times_4,
1095 arrayOopDesc::base_offset_in_bytes(T_INT)),
1096 rax, noreg, noreg);
1097 }
1098
1099 void TemplateTable::lastore() {
1100 transition(ltos, vtos);
1101 __ pop_i(rbx);
1102 // rax,: low(value)
1103 // rcx: array
1104 // rdx: high(value)
1105 index_check(rcx, rbx); // prefer index in rbx,
1106 // rbx,: index
1107 __ access_store_at(T_LONG, IN_HEAP | IS_ARRAY,
1108 Address(rcx, rbx, Address::times_8,
1109 arrayOopDesc::base_offset_in_bytes(T_LONG)),
1110 noreg /* ltos */, noreg, noreg);
1111 }
1112
1113
1114 void TemplateTable::fastore() {
1115 transition(ftos, vtos);
1116 __ pop_i(rbx);
1117 // value is in UseSSE >= 1 ? xmm0 : ST(0)
1118 // rbx: index
1119 // rdx: array
1120 index_check(rdx, rbx); // prefer index in rbx
1121 __ access_store_at(T_FLOAT, IN_HEAP | IS_ARRAY,
1122 Address(rdx, rbx, Address::times_4,
1123 arrayOopDesc::base_offset_in_bytes(T_FLOAT)),
1124 noreg /* ftos */, noreg, noreg);
1125 }
1126
1127 void TemplateTable::dastore() {
1128 transition(dtos, vtos);
1129 __ pop_i(rbx);
1130 // value is in UseSSE >= 2 ? xmm0 : ST(0)
1131 // rbx: index
1132 // rdx: array
1133 index_check(rdx, rbx); // prefer index in rbx
1134 __ access_store_at(T_DOUBLE, IN_HEAP | IS_ARRAY,
1135 Address(rdx, rbx, Address::times_8,
1136 arrayOopDesc::base_offset_in_bytes(T_DOUBLE)),
1137 noreg /* dtos */, noreg, noreg);
1138 }
1139
1140 void TemplateTable::aastore() {
1141 Label is_null, is_flat_array, ok_is_subtype, done;
1142 transition(vtos, vtos);
1143 // stack: ..., array, index, value
1144 __ movptr(rax, at_tos()); // value
1145 __ movl(rcx, at_tos_p1()); // index
1146 __ movptr(rdx, at_tos_p2()); // array
1147
1148 Address element_address(rdx, rcx,
1149 UseCompressedOops? Address::times_4 : Address::times_ptr,
1150 arrayOopDesc::base_offset_in_bytes(T_OBJECT));
1151
1152 index_check_without_pop(rdx, rcx); // kills rbx
1153
1154 __ profile_array(rdi, rdx, rbx);
1155 __ profile_element(rdi, rax, rbx);
1156
1157 __ testptr(rax, rax);
1158 __ jcc(Assembler::zero, is_null);
1159
1160 // Move array class to rdi
1161 __ load_klass(rdi, rdx);
1162 if (ValueArrayFlatten) {
1163 __ test_flattened_array_oop(rdx, rbx, is_flat_array);
1164 }
1165
1166 // Move subklass into rbx
1167 __ load_klass(rbx, rax);
1168 // Move array element superklass into rax
1169 __ movptr(rax, Address(rdi,
1170 ObjArrayKlass::element_klass_offset()));
1171
1172 // Generate subtype check. Blows rcx, rdi
1173 // Superklass in rax. Subklass in rbx.
1174 // is "rbx <: rax" ? (value subclass <: array element superclass)
1175 __ gen_subtype_check(rbx, ok_is_subtype, false);
1176
1177 // Come here on failure
1178 // object is at TOS
1179 __ jump(ExternalAddress(Interpreter::_throw_ArrayStoreException_entry));
1180
1181 // Come here on success
1182 __ bind(ok_is_subtype);
1183
1184 // Get the value we will store
1185 __ movptr(rax, at_tos());
1186 __ movl(rcx, at_tos_p1()); // index
1187 // Now store using the appropriate barrier
1188 do_oop_store(_masm, element_address, rax, IS_ARRAY);
1189 __ jmp(done);
1190
1191 // Have a NULL in rax, rdx=array, ecx=index. Store NULL at ary[idx]
1192 __ bind(is_null);
1193 if (EnableValhalla) {
1194 Label is_null_into_value_array_npe, store_null;
1195
1196 // No way to store null in null-free array
1197 __ test_null_free_array_oop(rdx, rbx, is_null_into_value_array_npe);
1198 __ jmp(store_null);
1199
1200 __ bind(is_null_into_value_array_npe);
1201 __ jump(ExternalAddress(Interpreter::_throw_NullPointerException_entry));
1202
1203 __ bind(store_null);
1204 }
1205 // Store a NULL
1206 do_oop_store(_masm, element_address, noreg, IS_ARRAY);
1207 __ jmp(done);
1208
1209 if (EnableValhalla) {
1210 Label is_type_ok;
1211 __ bind(is_flat_array); // Store non-null value to flat
1212
1213 // Simplistic type check...
1214
1215 // Profile the not-null value's klass.
1216 __ load_klass(rbx, rax);
1217 // Move element klass into rax
1218 __ movptr(rax, Address(rdi, ArrayKlass::element_klass_offset()));
1219 // flat value array needs exact type match
1220 // is "rax == rbx" (value subclass == array element superclass)
1221 __ cmpptr(rax, rbx);
1222 __ jccb(Assembler::equal, is_type_ok);
1223
1224 __ jump(ExternalAddress(Interpreter::_throw_ArrayStoreException_entry));
1225
1226 __ bind(is_type_ok);
1227 __ movptr(rax, at_tos()); // value
1228 __ movl(rcx, at_tos_p1()); // index
1229 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::value_array_store), rax, rdx, rcx);
1230 }
1231 // Pop stack arguments
1232 __ bind(done);
1233 __ addptr(rsp, 3 * Interpreter::stackElementSize);
1234 }
1235
1236 void TemplateTable::bastore() {
1237 transition(itos, vtos);
1238 __ pop_i(rbx);
1239 // rax: value
1240 // rbx: index
1241 // rdx: array
1242 index_check(rdx, rbx); // prefer index in rbx
1243 // Need to check whether array is boolean or byte
1244 // since both types share the bastore bytecode.
1245 __ load_klass(rcx, rdx);
1246 __ movl(rcx, Address(rcx, Klass::layout_helper_offset()));
1247 int diffbit = Klass::layout_helper_boolean_diffbit();
1248 __ testl(rcx, diffbit);
1249 Label L_skip;
1250 __ jccb(Assembler::zero, L_skip);
1251 __ andl(rax, 1); // if it is a T_BOOLEAN array, mask the stored value to 0/1
1252 __ bind(L_skip);
1253 __ access_store_at(T_BYTE, IN_HEAP | IS_ARRAY,
1254 Address(rdx, rbx,Address::times_1,
1255 arrayOopDesc::base_offset_in_bytes(T_BYTE)),
1256 rax, noreg, noreg);
1257 }
1258
1259 void TemplateTable::castore() {
1260 transition(itos, vtos);
1261 __ pop_i(rbx);
1262 // rax: value
1263 // rbx: index
1264 // rdx: array
1265 index_check(rdx, rbx); // prefer index in rbx
1266 __ access_store_at(T_CHAR, IN_HEAP | IS_ARRAY,
1267 Address(rdx, rbx, Address::times_2,
1268 arrayOopDesc::base_offset_in_bytes(T_CHAR)),
1269 rax, noreg, noreg);
1270 }
1271
1272
1273 void TemplateTable::sastore() {
1274 castore();
1275 }
1276
1277 void TemplateTable::istore(int n) {
1278 transition(itos, vtos);
1279 __ movl(iaddress(n), rax);
1280 }
1281
1282 void TemplateTable::lstore(int n) {
1283 transition(ltos, vtos);
1284 __ movptr(laddress(n), rax);
1285 NOT_LP64(__ movptr(haddress(n), rdx));
1286 }
1287
1288 void TemplateTable::fstore(int n) {
1289 transition(ftos, vtos);
1290 __ store_float(faddress(n));
1291 }
1292
1293 void TemplateTable::dstore(int n) {
1294 transition(dtos, vtos);
1295 __ store_double(daddress(n));
1296 }
1297
1298
1299 void TemplateTable::astore(int n) {
1300 transition(vtos, vtos);
1301 __ pop_ptr(rax);
1302 __ movptr(aaddress(n), rax);
1303 }
1304
1305 void TemplateTable::pop() {
1306 transition(vtos, vtos);
1307 __ addptr(rsp, Interpreter::stackElementSize);
1308 }
1309
1310 void TemplateTable::pop2() {
1311 transition(vtos, vtos);
1312 __ addptr(rsp, 2 * Interpreter::stackElementSize);
1313 }
1314
1315
1316 void TemplateTable::dup() {
1317 transition(vtos, vtos);
1318 __ load_ptr(0, rax);
1319 __ push_ptr(rax);
1320 // stack: ..., a, a
1321 }
1322
1323 void TemplateTable::dup_x1() {
1324 transition(vtos, vtos);
1325 // stack: ..., a, b
1326 __ load_ptr( 0, rax); // load b
1327 __ load_ptr( 1, rcx); // load a
1328 __ store_ptr(1, rax); // store b
1329 __ store_ptr(0, rcx); // store a
1330 __ push_ptr(rax); // push b
1331 // stack: ..., b, a, b
1332 }
1333
1334 void TemplateTable::dup_x2() {
1335 transition(vtos, vtos);
1336 // stack: ..., a, b, c
1337 __ load_ptr( 0, rax); // load c
1338 __ load_ptr( 2, rcx); // load a
1339 __ store_ptr(2, rax); // store c in a
1340 __ push_ptr(rax); // push c
1341 // stack: ..., c, b, c, c
1342 __ load_ptr( 2, rax); // load b
1343 __ store_ptr(2, rcx); // store a in b
1344 // stack: ..., c, a, c, c
1345 __ store_ptr(1, rax); // store b in c
1346 // stack: ..., c, a, b, c
1347 }
1348
1349 void TemplateTable::dup2() {
1350 transition(vtos, vtos);
1351 // stack: ..., a, b
1352 __ load_ptr(1, rax); // load a
1353 __ push_ptr(rax); // push a
1354 __ load_ptr(1, rax); // load b
1355 __ push_ptr(rax); // push b
1356 // stack: ..., a, b, a, b
1357 }
1358
1359
1360 void TemplateTable::dup2_x1() {
1361 transition(vtos, vtos);
1362 // stack: ..., a, b, c
1363 __ load_ptr( 0, rcx); // load c
1364 __ load_ptr( 1, rax); // load b
1365 __ push_ptr(rax); // push b
1366 __ push_ptr(rcx); // push c
1367 // stack: ..., a, b, c, b, c
1368 __ store_ptr(3, rcx); // store c in b
1369 // stack: ..., a, c, c, b, c
1370 __ load_ptr( 4, rcx); // load a
1371 __ store_ptr(2, rcx); // store a in 2nd c
1372 // stack: ..., a, c, a, b, c
1373 __ store_ptr(4, rax); // store b in a
1374 // stack: ..., b, c, a, b, c
1375 }
1376
1377 void TemplateTable::dup2_x2() {
1378 transition(vtos, vtos);
1379 // stack: ..., a, b, c, d
1380 __ load_ptr( 0, rcx); // load d
1381 __ load_ptr( 1, rax); // load c
1382 __ push_ptr(rax); // push c
1383 __ push_ptr(rcx); // push d
1384 // stack: ..., a, b, c, d, c, d
1385 __ load_ptr( 4, rax); // load b
1386 __ store_ptr(2, rax); // store b in d
1387 __ store_ptr(4, rcx); // store d in b
1388 // stack: ..., a, d, c, b, c, d
1389 __ load_ptr( 5, rcx); // load a
1390 __ load_ptr( 3, rax); // load c
1391 __ store_ptr(3, rcx); // store a in c
1392 __ store_ptr(5, rax); // store c in a
1393 // stack: ..., c, d, a, b, c, d
1394 }
1395
1396 void TemplateTable::swap() {
1397 transition(vtos, vtos);
1398 // stack: ..., a, b
1399 __ load_ptr( 1, rcx); // load a
1400 __ load_ptr( 0, rax); // load b
1401 __ store_ptr(0, rcx); // store a in b
1402 __ store_ptr(1, rax); // store b in a
1403 // stack: ..., b, a
1404 }
1405
1406 void TemplateTable::iop2(Operation op) {
1407 transition(itos, itos);
1408 switch (op) {
1409 case add : __ pop_i(rdx); __ addl (rax, rdx); break;
1410 case sub : __ movl(rdx, rax); __ pop_i(rax); __ subl (rax, rdx); break;
1411 case mul : __ pop_i(rdx); __ imull(rax, rdx); break;
1412 case _and : __ pop_i(rdx); __ andl (rax, rdx); break;
1413 case _or : __ pop_i(rdx); __ orl (rax, rdx); break;
1414 case _xor : __ pop_i(rdx); __ xorl (rax, rdx); break;
1415 case shl : __ movl(rcx, rax); __ pop_i(rax); __ shll (rax); break;
1416 case shr : __ movl(rcx, rax); __ pop_i(rax); __ sarl (rax); break;
1417 case ushr : __ movl(rcx, rax); __ pop_i(rax); __ shrl (rax); break;
1418 default : ShouldNotReachHere();
1419 }
1420 }
1421
1422 void TemplateTable::lop2(Operation op) {
1423 transition(ltos, ltos);
1424 #ifdef _LP64
1425 switch (op) {
1426 case add : __ pop_l(rdx); __ addptr(rax, rdx); break;
1427 case sub : __ mov(rdx, rax); __ pop_l(rax); __ subptr(rax, rdx); break;
1428 case _and : __ pop_l(rdx); __ andptr(rax, rdx); break;
1429 case _or : __ pop_l(rdx); __ orptr (rax, rdx); break;
1430 case _xor : __ pop_l(rdx); __ xorptr(rax, rdx); break;
1431 default : ShouldNotReachHere();
1432 }
1433 #else
1434 __ pop_l(rbx, rcx);
1435 switch (op) {
1436 case add : __ addl(rax, rbx); __ adcl(rdx, rcx); break;
1437 case sub : __ subl(rbx, rax); __ sbbl(rcx, rdx);
1438 __ mov (rax, rbx); __ mov (rdx, rcx); break;
1439 case _and : __ andl(rax, rbx); __ andl(rdx, rcx); break;
1440 case _or : __ orl (rax, rbx); __ orl (rdx, rcx); break;
1441 case _xor : __ xorl(rax, rbx); __ xorl(rdx, rcx); break;
1442 default : ShouldNotReachHere();
1443 }
1444 #endif
1445 }
1446
1447 void TemplateTable::idiv() {
1448 transition(itos, itos);
1449 __ movl(rcx, rax);
1450 __ pop_i(rax);
1451 // Note: could xor rax and ecx and compare with (-1 ^ min_int). If
1452 // they are not equal, one could do a normal division (no correction
1453 // needed), which may speed up this implementation for the common case.
1454 // (see also JVM spec., p.243 & p.271)
1455 __ corrected_idivl(rcx);
1456 }
1457
1458 void TemplateTable::irem() {
1459 transition(itos, itos);
1460 __ movl(rcx, rax);
1461 __ pop_i(rax);
1462 // Note: could xor rax and ecx and compare with (-1 ^ min_int). If
1463 // they are not equal, one could do a normal division (no correction
1464 // needed), which may speed up this implementation for the common case.
1465 // (see also JVM spec., p.243 & p.271)
1466 __ corrected_idivl(rcx);
1467 __ movl(rax, rdx);
1468 }
1469
1470 void TemplateTable::lmul() {
1471 transition(ltos, ltos);
1472 #ifdef _LP64
1473 __ pop_l(rdx);
1474 __ imulq(rax, rdx);
1475 #else
1476 __ pop_l(rbx, rcx);
1477 __ push(rcx); __ push(rbx);
1478 __ push(rdx); __ push(rax);
1479 __ lmul(2 * wordSize, 0);
1480 __ addptr(rsp, 4 * wordSize); // take off temporaries
1481 #endif
1482 }
1483
1484 void TemplateTable::ldiv() {
1485 transition(ltos, ltos);
1486 #ifdef _LP64
1487 __ mov(rcx, rax);
1488 __ pop_l(rax);
1489 // generate explicit div0 check
1490 __ testq(rcx, rcx);
1491 __ jump_cc(Assembler::zero,
1492 ExternalAddress(Interpreter::_throw_ArithmeticException_entry));
1493 // Note: could xor rax and rcx and compare with (-1 ^ min_int). If
1494 // they are not equal, one could do a normal division (no correction
1495 // needed), which may speed up this implementation for the common case.
1496 // (see also JVM spec., p.243 & p.271)
1497 __ corrected_idivq(rcx); // kills rbx
1498 #else
1499 __ pop_l(rbx, rcx);
1500 __ push(rcx); __ push(rbx);
1501 __ push(rdx); __ push(rax);
1502 // check if y = 0
1503 __ orl(rax, rdx);
1504 __ jump_cc(Assembler::zero,
1505 ExternalAddress(Interpreter::_throw_ArithmeticException_entry));
1506 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::ldiv));
1507 __ addptr(rsp, 4 * wordSize); // take off temporaries
1508 #endif
1509 }
1510
1511 void TemplateTable::lrem() {
1512 transition(ltos, ltos);
1513 #ifdef _LP64
1514 __ mov(rcx, rax);
1515 __ pop_l(rax);
1516 __ testq(rcx, rcx);
1517 __ jump_cc(Assembler::zero,
1518 ExternalAddress(Interpreter::_throw_ArithmeticException_entry));
1519 // Note: could xor rax and rcx and compare with (-1 ^ min_int). If
1520 // they are not equal, one could do a normal division (no correction
1521 // needed), which may speed up this implementation for the common case.
1522 // (see also JVM spec., p.243 & p.271)
1523 __ corrected_idivq(rcx); // kills rbx
1524 __ mov(rax, rdx);
1525 #else
1526 __ pop_l(rbx, rcx);
1527 __ push(rcx); __ push(rbx);
1528 __ push(rdx); __ push(rax);
1529 // check if y = 0
1530 __ orl(rax, rdx);
1531 __ jump_cc(Assembler::zero,
1532 ExternalAddress(Interpreter::_throw_ArithmeticException_entry));
1533 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::lrem));
1534 __ addptr(rsp, 4 * wordSize);
1535 #endif
1536 }
1537
1538 void TemplateTable::lshl() {
1539 transition(itos, ltos);
1540 __ movl(rcx, rax); // get shift count
1541 #ifdef _LP64
1542 __ pop_l(rax); // get shift value
1543 __ shlq(rax);
1544 #else
1545 __ pop_l(rax, rdx); // get shift value
1546 __ lshl(rdx, rax);
1547 #endif
1548 }
1549
1550 void TemplateTable::lshr() {
1551 #ifdef _LP64
1552 transition(itos, ltos);
1553 __ movl(rcx, rax); // get shift count
1554 __ pop_l(rax); // get shift value
1555 __ sarq(rax);
1556 #else
1557 transition(itos, ltos);
1558 __ mov(rcx, rax); // get shift count
1559 __ pop_l(rax, rdx); // get shift value
1560 __ lshr(rdx, rax, true);
1561 #endif
1562 }
1563
1564 void TemplateTable::lushr() {
1565 transition(itos, ltos);
1566 #ifdef _LP64
1567 __ movl(rcx, rax); // get shift count
1568 __ pop_l(rax); // get shift value
1569 __ shrq(rax);
1570 #else
1571 __ mov(rcx, rax); // get shift count
1572 __ pop_l(rax, rdx); // get shift value
1573 __ lshr(rdx, rax);
1574 #endif
1575 }
1576
1577 void TemplateTable::fop2(Operation op) {
1578 transition(ftos, ftos);
1579
1580 if (UseSSE >= 1) {
1581 switch (op) {
1582 case add:
1583 __ addss(xmm0, at_rsp());
1584 __ addptr(rsp, Interpreter::stackElementSize);
1585 break;
1586 case sub:
1587 __ movflt(xmm1, xmm0);
1588 __ pop_f(xmm0);
1589 __ subss(xmm0, xmm1);
1590 break;
1591 case mul:
1592 __ mulss(xmm0, at_rsp());
1593 __ addptr(rsp, Interpreter::stackElementSize);
1594 break;
1595 case div:
1596 __ movflt(xmm1, xmm0);
1597 __ pop_f(xmm0);
1598 __ divss(xmm0, xmm1);
1599 break;
1600 case rem:
1601 // On x86_64 platforms the SharedRuntime::frem method is called to perform the
1602 // modulo operation. The frem method calls the function
1603 // double fmod(double x, double y) in math.h. The documentation of fmod states:
1604 // "If x or y is a NaN, a NaN is returned." without specifying what type of NaN
1605 // (signalling or quiet) is returned.
1606 //
1607 // On x86_32 platforms the FPU is used to perform the modulo operation. The
1608 // reason is that on 32-bit Windows the sign of modulo operations diverges from
1609 // what is considered the standard (e.g., -0.0f % -3.14f is 0.0f (and not -0.0f).
1610 // The fprem instruction used on x86_32 is functionally equivalent to
1611 // SharedRuntime::frem in that it returns a NaN.
1612 #ifdef _LP64
1613 __ movflt(xmm1, xmm0);
1614 __ pop_f(xmm0);
1615 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::frem), 2);
1616 #else
1617 __ push_f(xmm0);
1618 __ pop_f();
1619 __ fld_s(at_rsp());
1620 __ fremr(rax);
1621 __ f2ieee();
1622 __ pop(rax); // pop second operand off the stack
1623 __ push_f();
1624 __ pop_f(xmm0);
1625 #endif
1626 break;
1627 default:
1628 ShouldNotReachHere();
1629 break;
1630 }
1631 } else {
1632 #ifdef _LP64
1633 ShouldNotReachHere();
1634 #else
1635 switch (op) {
1636 case add: __ fadd_s (at_rsp()); break;
1637 case sub: __ fsubr_s(at_rsp()); break;
1638 case mul: __ fmul_s (at_rsp()); break;
1639 case div: __ fdivr_s(at_rsp()); break;
1640 case rem: __ fld_s (at_rsp()); __ fremr(rax); break;
1641 default : ShouldNotReachHere();
1642 }
1643 __ f2ieee();
1644 __ pop(rax); // pop second operand off the stack
1645 #endif // _LP64
1646 }
1647 }
1648
1649 void TemplateTable::dop2(Operation op) {
1650 transition(dtos, dtos);
1651 if (UseSSE >= 2) {
1652 switch (op) {
1653 case add:
1654 __ addsd(xmm0, at_rsp());
1655 __ addptr(rsp, 2 * Interpreter::stackElementSize);
1656 break;
1657 case sub:
1658 __ movdbl(xmm1, xmm0);
1659 __ pop_d(xmm0);
1660 __ subsd(xmm0, xmm1);
1661 break;
1662 case mul:
1663 __ mulsd(xmm0, at_rsp());
1664 __ addptr(rsp, 2 * Interpreter::stackElementSize);
1665 break;
1666 case div:
1667 __ movdbl(xmm1, xmm0);
1668 __ pop_d(xmm0);
1669 __ divsd(xmm0, xmm1);
1670 break;
1671 case rem:
1672 // Similar to fop2(), the modulo operation is performed using the
1673 // SharedRuntime::drem method (on x86_64 platforms) or using the
1674 // FPU (on x86_32 platforms) for the same reasons as mentioned in fop2().
1675 #ifdef _LP64
1676 __ movdbl(xmm1, xmm0);
1677 __ pop_d(xmm0);
1678 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::drem), 2);
1679 #else
1680 __ push_d(xmm0);
1681 __ pop_d();
1682 __ fld_d(at_rsp());
1683 __ fremr(rax);
1684 __ d2ieee();
1685 __ pop(rax);
1686 __ pop(rdx);
1687 __ push_d();
1688 __ pop_d(xmm0);
1689 #endif
1690 break;
1691 default:
1692 ShouldNotReachHere();
1693 break;
1694 }
1695 } else {
1696 #ifdef _LP64
1697 ShouldNotReachHere();
1698 #else
1699 switch (op) {
1700 case add: __ fadd_d (at_rsp()); break;
1701 case sub: __ fsubr_d(at_rsp()); break;
1702 case mul: {
1703 Label L_strict;
1704 Label L_join;
1705 const Address access_flags (rcx, Method::access_flags_offset());
1706 __ get_method(rcx);
1707 __ movl(rcx, access_flags);
1708 __ testl(rcx, JVM_ACC_STRICT);
1709 __ jccb(Assembler::notZero, L_strict);
1710 __ fmul_d (at_rsp());
1711 __ jmpb(L_join);
1712 __ bind(L_strict);
1713 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1()));
1714 __ fmulp();
1715 __ fmul_d (at_rsp());
1716 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2()));
1717 __ fmulp();
1718 __ bind(L_join);
1719 break;
1720 }
1721 case div: {
1722 Label L_strict;
1723 Label L_join;
1724 const Address access_flags (rcx, Method::access_flags_offset());
1725 __ get_method(rcx);
1726 __ movl(rcx, access_flags);
1727 __ testl(rcx, JVM_ACC_STRICT);
1728 __ jccb(Assembler::notZero, L_strict);
1729 __ fdivr_d(at_rsp());
1730 __ jmp(L_join);
1731 __ bind(L_strict);
1732 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1()));
1733 __ fmul_d (at_rsp());
1734 __ fdivrp();
1735 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2()));
1736 __ fmulp();
1737 __ bind(L_join);
1738 break;
1739 }
1740 case rem: __ fld_d (at_rsp()); __ fremr(rax); break;
1741 default : ShouldNotReachHere();
1742 }
1743 __ d2ieee();
1744 // Pop double precision number from rsp.
1745 __ pop(rax);
1746 __ pop(rdx);
1747 #endif
1748 }
1749 }
1750
1751 void TemplateTable::ineg() {
1752 transition(itos, itos);
1753 __ negl(rax);
1754 }
1755
1756 void TemplateTable::lneg() {
1757 transition(ltos, ltos);
1758 LP64_ONLY(__ negq(rax));
1759 NOT_LP64(__ lneg(rdx, rax));
1760 }
1761
1762 // Note: 'double' and 'long long' have 32-bits alignment on x86.
1763 static jlong* double_quadword(jlong *adr, jlong lo, jlong hi) {
1764 // Use the expression (adr)&(~0xF) to provide 128-bits aligned address
1765 // of 128-bits operands for SSE instructions.
1766 jlong *operand = (jlong*)(((intptr_t)adr)&((intptr_t)(~0xF)));
1767 // Store the value to a 128-bits operand.
1768 operand[0] = lo;
1769 operand[1] = hi;
1770 return operand;
1771 }
1772
1773 // Buffer for 128-bits masks used by SSE instructions.
1774 static jlong float_signflip_pool[2*2];
1775 static jlong double_signflip_pool[2*2];
1776
1777 void TemplateTable::fneg() {
1778 transition(ftos, ftos);
1779 if (UseSSE >= 1) {
1780 static jlong *float_signflip = double_quadword(&float_signflip_pool[1], CONST64(0x8000000080000000), CONST64(0x8000000080000000));
1781 __ xorps(xmm0, ExternalAddress((address) float_signflip));
1782 } else {
1783 LP64_ONLY(ShouldNotReachHere());
1784 NOT_LP64(__ fchs());
1785 }
1786 }
1787
1788 void TemplateTable::dneg() {
1789 transition(dtos, dtos);
1790 if (UseSSE >= 2) {
1791 static jlong *double_signflip =
1792 double_quadword(&double_signflip_pool[1], CONST64(0x8000000000000000), CONST64(0x8000000000000000));
1793 __ xorpd(xmm0, ExternalAddress((address) double_signflip));
1794 } else {
1795 #ifdef _LP64
1796 ShouldNotReachHere();
1797 #else
1798 __ fchs();
1799 #endif
1800 }
1801 }
1802
1803 void TemplateTable::iinc() {
1804 transition(vtos, vtos);
1805 __ load_signed_byte(rdx, at_bcp(2)); // get constant
1806 locals_index(rbx);
1807 __ addl(iaddress(rbx), rdx);
1808 }
1809
1810 void TemplateTable::wide_iinc() {
1811 transition(vtos, vtos);
1812 __ movl(rdx, at_bcp(4)); // get constant
1813 locals_index_wide(rbx);
1814 __ bswapl(rdx); // swap bytes & sign-extend constant
1815 __ sarl(rdx, 16);
1816 __ addl(iaddress(rbx), rdx);
1817 // Note: should probably use only one movl to get both
1818 // the index and the constant -> fix this
1819 }
1820
1821 void TemplateTable::convert() {
1822 #ifdef _LP64
1823 // Checking
1824 #ifdef ASSERT
1825 {
1826 TosState tos_in = ilgl;
1827 TosState tos_out = ilgl;
1828 switch (bytecode()) {
1829 case Bytecodes::_i2l: // fall through
1830 case Bytecodes::_i2f: // fall through
1831 case Bytecodes::_i2d: // fall through
1832 case Bytecodes::_i2b: // fall through
1833 case Bytecodes::_i2c: // fall through
1834 case Bytecodes::_i2s: tos_in = itos; break;
1835 case Bytecodes::_l2i: // fall through
1836 case Bytecodes::_l2f: // fall through
1837 case Bytecodes::_l2d: tos_in = ltos; break;
1838 case Bytecodes::_f2i: // fall through
1839 case Bytecodes::_f2l: // fall through
1840 case Bytecodes::_f2d: tos_in = ftos; break;
1841 case Bytecodes::_d2i: // fall through
1842 case Bytecodes::_d2l: // fall through
1843 case Bytecodes::_d2f: tos_in = dtos; break;
1844 default : ShouldNotReachHere();
1845 }
1846 switch (bytecode()) {
1847 case Bytecodes::_l2i: // fall through
1848 case Bytecodes::_f2i: // fall through
1849 case Bytecodes::_d2i: // fall through
1850 case Bytecodes::_i2b: // fall through
1851 case Bytecodes::_i2c: // fall through
1852 case Bytecodes::_i2s: tos_out = itos; break;
1853 case Bytecodes::_i2l: // fall through
1854 case Bytecodes::_f2l: // fall through
1855 case Bytecodes::_d2l: tos_out = ltos; break;
1856 case Bytecodes::_i2f: // fall through
1857 case Bytecodes::_l2f: // fall through
1858 case Bytecodes::_d2f: tos_out = ftos; break;
1859 case Bytecodes::_i2d: // fall through
1860 case Bytecodes::_l2d: // fall through
1861 case Bytecodes::_f2d: tos_out = dtos; break;
1862 default : ShouldNotReachHere();
1863 }
1864 transition(tos_in, tos_out);
1865 }
1866 #endif // ASSERT
1867
1868 static const int64_t is_nan = 0x8000000000000000L;
1869
1870 // Conversion
1871 switch (bytecode()) {
1872 case Bytecodes::_i2l:
1873 __ movslq(rax, rax);
1874 break;
1875 case Bytecodes::_i2f:
1876 __ cvtsi2ssl(xmm0, rax);
1877 break;
1878 case Bytecodes::_i2d:
1879 __ cvtsi2sdl(xmm0, rax);
1880 break;
1881 case Bytecodes::_i2b:
1882 __ movsbl(rax, rax);
1883 break;
1884 case Bytecodes::_i2c:
1885 __ movzwl(rax, rax);
1886 break;
1887 case Bytecodes::_i2s:
1888 __ movswl(rax, rax);
1889 break;
1890 case Bytecodes::_l2i:
1891 __ movl(rax, rax);
1892 break;
1893 case Bytecodes::_l2f:
1894 __ cvtsi2ssq(xmm0, rax);
1895 break;
1896 case Bytecodes::_l2d:
1897 __ cvtsi2sdq(xmm0, rax);
1898 break;
1899 case Bytecodes::_f2i:
1900 {
1901 Label L;
1902 __ cvttss2sil(rax, xmm0);
1903 __ cmpl(rax, 0x80000000); // NaN or overflow/underflow?
1904 __ jcc(Assembler::notEqual, L);
1905 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2i), 1);
1906 __ bind(L);
1907 }
1908 break;
1909 case Bytecodes::_f2l:
1910 {
1911 Label L;
1912 __ cvttss2siq(rax, xmm0);
1913 // NaN or overflow/underflow?
1914 __ cmp64(rax, ExternalAddress((address) &is_nan));
1915 __ jcc(Assembler::notEqual, L);
1916 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2l), 1);
1917 __ bind(L);
1918 }
1919 break;
1920 case Bytecodes::_f2d:
1921 __ cvtss2sd(xmm0, xmm0);
1922 break;
1923 case Bytecodes::_d2i:
1924 {
1925 Label L;
1926 __ cvttsd2sil(rax, xmm0);
1927 __ cmpl(rax, 0x80000000); // NaN or overflow/underflow?
1928 __ jcc(Assembler::notEqual, L);
1929 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2i), 1);
1930 __ bind(L);
1931 }
1932 break;
1933 case Bytecodes::_d2l:
1934 {
1935 Label L;
1936 __ cvttsd2siq(rax, xmm0);
1937 // NaN or overflow/underflow?
1938 __ cmp64(rax, ExternalAddress((address) &is_nan));
1939 __ jcc(Assembler::notEqual, L);
1940 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2l), 1);
1941 __ bind(L);
1942 }
1943 break;
1944 case Bytecodes::_d2f:
1945 __ cvtsd2ss(xmm0, xmm0);
1946 break;
1947 default:
1948 ShouldNotReachHere();
1949 }
1950 #else
1951 // Checking
1952 #ifdef ASSERT
1953 { TosState tos_in = ilgl;
1954 TosState tos_out = ilgl;
1955 switch (bytecode()) {
1956 case Bytecodes::_i2l: // fall through
1957 case Bytecodes::_i2f: // fall through
1958 case Bytecodes::_i2d: // fall through
1959 case Bytecodes::_i2b: // fall through
1960 case Bytecodes::_i2c: // fall through
1961 case Bytecodes::_i2s: tos_in = itos; break;
1962 case Bytecodes::_l2i: // fall through
1963 case Bytecodes::_l2f: // fall through
1964 case Bytecodes::_l2d: tos_in = ltos; break;
1965 case Bytecodes::_f2i: // fall through
1966 case Bytecodes::_f2l: // fall through
1967 case Bytecodes::_f2d: tos_in = ftos; break;
1968 case Bytecodes::_d2i: // fall through
1969 case Bytecodes::_d2l: // fall through
1970 case Bytecodes::_d2f: tos_in = dtos; break;
1971 default : ShouldNotReachHere();
1972 }
1973 switch (bytecode()) {
1974 case Bytecodes::_l2i: // fall through
1975 case Bytecodes::_f2i: // fall through
1976 case Bytecodes::_d2i: // fall through
1977 case Bytecodes::_i2b: // fall through
1978 case Bytecodes::_i2c: // fall through
1979 case Bytecodes::_i2s: tos_out = itos; break;
1980 case Bytecodes::_i2l: // fall through
1981 case Bytecodes::_f2l: // fall through
1982 case Bytecodes::_d2l: tos_out = ltos; break;
1983 case Bytecodes::_i2f: // fall through
1984 case Bytecodes::_l2f: // fall through
1985 case Bytecodes::_d2f: tos_out = ftos; break;
1986 case Bytecodes::_i2d: // fall through
1987 case Bytecodes::_l2d: // fall through
1988 case Bytecodes::_f2d: tos_out = dtos; break;
1989 default : ShouldNotReachHere();
1990 }
1991 transition(tos_in, tos_out);
1992 }
1993 #endif // ASSERT
1994
1995 // Conversion
1996 // (Note: use push(rcx)/pop(rcx) for 1/2-word stack-ptr manipulation)
1997 switch (bytecode()) {
1998 case Bytecodes::_i2l:
1999 __ extend_sign(rdx, rax);
2000 break;
2001 case Bytecodes::_i2f:
2002 if (UseSSE >= 1) {
2003 __ cvtsi2ssl(xmm0, rax);
2004 } else {
2005 __ push(rax); // store int on tos
2006 __ fild_s(at_rsp()); // load int to ST0
2007 __ f2ieee(); // truncate to float size
2008 __ pop(rcx); // adjust rsp
2009 }
2010 break;
2011 case Bytecodes::_i2d:
2012 if (UseSSE >= 2) {
2013 __ cvtsi2sdl(xmm0, rax);
2014 } else {
2015 __ push(rax); // add one slot for d2ieee()
2016 __ push(rax); // store int on tos
2017 __ fild_s(at_rsp()); // load int to ST0
2018 __ d2ieee(); // truncate to double size
2019 __ pop(rcx); // adjust rsp
2020 __ pop(rcx);
2021 }
2022 break;
2023 case Bytecodes::_i2b:
2024 __ shll(rax, 24); // truncate upper 24 bits
2025 __ sarl(rax, 24); // and sign-extend byte
2026 LP64_ONLY(__ movsbl(rax, rax));
2027 break;
2028 case Bytecodes::_i2c:
2029 __ andl(rax, 0xFFFF); // truncate upper 16 bits
2030 LP64_ONLY(__ movzwl(rax, rax));
2031 break;
2032 case Bytecodes::_i2s:
2033 __ shll(rax, 16); // truncate upper 16 bits
2034 __ sarl(rax, 16); // and sign-extend short
2035 LP64_ONLY(__ movswl(rax, rax));
2036 break;
2037 case Bytecodes::_l2i:
2038 /* nothing to do */
2039 break;
2040 case Bytecodes::_l2f:
2041 // On 64-bit platforms, the cvtsi2ssq instruction is used to convert
2042 // 64-bit long values to floats. On 32-bit platforms it is not possible
2043 // to use that instruction with 64-bit operands, therefore the FPU is
2044 // used to perform the conversion.
2045 __ push(rdx); // store long on tos
2046 __ push(rax);
2047 __ fild_d(at_rsp()); // load long to ST0
2048 __ f2ieee(); // truncate to float size
2049 __ pop(rcx); // adjust rsp
2050 __ pop(rcx);
2051 if (UseSSE >= 1) {
2052 __ push_f();
2053 __ pop_f(xmm0);
2054 }
2055 break;
2056 case Bytecodes::_l2d:
2057 // On 32-bit platforms the FPU is used for conversion because on
2058 // 32-bit platforms it is not not possible to use the cvtsi2sdq
2059 // instruction with 64-bit operands.
2060 __ push(rdx); // store long on tos
2061 __ push(rax);
2062 __ fild_d(at_rsp()); // load long to ST0
2063 __ d2ieee(); // truncate to double size
2064 __ pop(rcx); // adjust rsp
2065 __ pop(rcx);
2066 if (UseSSE >= 2) {
2067 __ push_d();
2068 __ pop_d(xmm0);
2069 }
2070 break;
2071 case Bytecodes::_f2i:
2072 // SharedRuntime::f2i does not differentiate between sNaNs and qNaNs
2073 // as it returns 0 for any NaN.
2074 if (UseSSE >= 1) {
2075 __ push_f(xmm0);
2076 } else {
2077 __ push(rcx); // reserve space for argument
2078 __ fstp_s(at_rsp()); // pass float argument on stack
2079 }
2080 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2i), 1);
2081 break;
2082 case Bytecodes::_f2l:
2083 // SharedRuntime::f2l does not differentiate between sNaNs and qNaNs
2084 // as it returns 0 for any NaN.
2085 if (UseSSE >= 1) {
2086 __ push_f(xmm0);
2087 } else {
2088 __ push(rcx); // reserve space for argument
2089 __ fstp_s(at_rsp()); // pass float argument on stack
2090 }
2091 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2l), 1);
2092 break;
2093 case Bytecodes::_f2d:
2094 if (UseSSE < 1) {
2095 /* nothing to do */
2096 } else if (UseSSE == 1) {
2097 __ push_f(xmm0);
2098 __ pop_f();
2099 } else { // UseSSE >= 2
2100 __ cvtss2sd(xmm0, xmm0);
2101 }
2102 break;
2103 case Bytecodes::_d2i:
2104 if (UseSSE >= 2) {
2105 __ push_d(xmm0);
2106 } else {
2107 __ push(rcx); // reserve space for argument
2108 __ push(rcx);
2109 __ fstp_d(at_rsp()); // pass double argument on stack
2110 }
2111 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2i), 2);
2112 break;
2113 case Bytecodes::_d2l:
2114 if (UseSSE >= 2) {
2115 __ push_d(xmm0);
2116 } else {
2117 __ push(rcx); // reserve space for argument
2118 __ push(rcx);
2119 __ fstp_d(at_rsp()); // pass double argument on stack
2120 }
2121 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2l), 2);
2122 break;
2123 case Bytecodes::_d2f:
2124 if (UseSSE <= 1) {
2125 __ push(rcx); // reserve space for f2ieee()
2126 __ f2ieee(); // truncate to float size
2127 __ pop(rcx); // adjust rsp
2128 if (UseSSE == 1) {
2129 // The cvtsd2ss instruction is not available if UseSSE==1, therefore
2130 // the conversion is performed using the FPU in this case.
2131 __ push_f();
2132 __ pop_f(xmm0);
2133 }
2134 } else { // UseSSE >= 2
2135 __ cvtsd2ss(xmm0, xmm0);
2136 }
2137 break;
2138 default :
2139 ShouldNotReachHere();
2140 }
2141 #endif
2142 }
2143
2144 void TemplateTable::lcmp() {
2145 transition(ltos, itos);
2146 #ifdef _LP64
2147 Label done;
2148 __ pop_l(rdx);
2149 __ cmpq(rdx, rax);
2150 __ movl(rax, -1);
2151 __ jccb(Assembler::less, done);
2152 __ setb(Assembler::notEqual, rax);
2153 __ movzbl(rax, rax);
2154 __ bind(done);
2155 #else
2156
2157 // y = rdx:rax
2158 __ pop_l(rbx, rcx); // get x = rcx:rbx
2159 __ lcmp2int(rcx, rbx, rdx, rax);// rcx := cmp(x, y)
2160 __ mov(rax, rcx);
2161 #endif
2162 }
2163
2164 void TemplateTable::float_cmp(bool is_float, int unordered_result) {
2165 if ((is_float && UseSSE >= 1) ||
2166 (!is_float && UseSSE >= 2)) {
2167 Label done;
2168 if (is_float) {
2169 // XXX get rid of pop here, use ... reg, mem32
2170 __ pop_f(xmm1);
2171 __ ucomiss(xmm1, xmm0);
2172 } else {
2173 // XXX get rid of pop here, use ... reg, mem64
2174 __ pop_d(xmm1);
2175 __ ucomisd(xmm1, xmm0);
2176 }
2177 if (unordered_result < 0) {
2178 __ movl(rax, -1);
2179 __ jccb(Assembler::parity, done);
2180 __ jccb(Assembler::below, done);
2181 __ setb(Assembler::notEqual, rdx);
2182 __ movzbl(rax, rdx);
2183 } else {
2184 __ movl(rax, 1);
2185 __ jccb(Assembler::parity, done);
2186 __ jccb(Assembler::above, done);
2187 __ movl(rax, 0);
2188 __ jccb(Assembler::equal, done);
2189 __ decrementl(rax);
2190 }
2191 __ bind(done);
2192 } else {
2193 #ifdef _LP64
2194 ShouldNotReachHere();
2195 #else
2196 if (is_float) {
2197 __ fld_s(at_rsp());
2198 } else {
2199 __ fld_d(at_rsp());
2200 __ pop(rdx);
2201 }
2202 __ pop(rcx);
2203 __ fcmp2int(rax, unordered_result < 0);
2204 #endif // _LP64
2205 }
2206 }
2207
2208 void TemplateTable::branch(bool is_jsr, bool is_wide) {
2209 __ get_method(rcx); // rcx holds method
2210 __ profile_taken_branch(rax, rbx); // rax holds updated MDP, rbx
2211 // holds bumped taken count
2212
2213 const ByteSize be_offset = MethodCounters::backedge_counter_offset() +
2214 InvocationCounter::counter_offset();
2215 const ByteSize inv_offset = MethodCounters::invocation_counter_offset() +
2216 InvocationCounter::counter_offset();
2217
2218 // Load up edx with the branch displacement
2219 if (is_wide) {
2220 __ movl(rdx, at_bcp(1));
2221 } else {
2222 __ load_signed_short(rdx, at_bcp(1));
2223 }
2224 __ bswapl(rdx);
2225
2226 if (!is_wide) {
2227 __ sarl(rdx, 16);
2228 }
2229 LP64_ONLY(__ movl2ptr(rdx, rdx));
2230
2231 // Handle all the JSR stuff here, then exit.
2232 // It's much shorter and cleaner than intermingling with the non-JSR
2233 // normal-branch stuff occurring below.
2234 if (is_jsr) {
2235 // Pre-load the next target bytecode into rbx
2236 __ load_unsigned_byte(rbx, Address(rbcp, rdx, Address::times_1, 0));
2237
2238 // compute return address as bci in rax
2239 __ lea(rax, at_bcp((is_wide ? 5 : 3) -
2240 in_bytes(ConstMethod::codes_offset())));
2241 __ subptr(rax, Address(rcx, Method::const_offset()));
2242 // Adjust the bcp in r13 by the displacement in rdx
2243 __ addptr(rbcp, rdx);
2244 // jsr returns atos that is not an oop
2245 __ push_i(rax);
2246 __ dispatch_only(vtos, true);
2247 return;
2248 }
2249
2250 // Normal (non-jsr) branch handling
2251
2252 // Adjust the bcp in r13 by the displacement in rdx
2253 __ addptr(rbcp, rdx);
2254
2255 assert(UseLoopCounter || !UseOnStackReplacement,
2256 "on-stack-replacement requires loop counters");
2257 Label backedge_counter_overflow;
2258 Label profile_method;
2259 Label dispatch;
2260 if (UseLoopCounter) {
2261 // increment backedge counter for backward branches
2262 // rax: MDO
2263 // rbx: MDO bumped taken-count
2264 // rcx: method
2265 // rdx: target offset
2266 // r13: target bcp
2267 // r14: locals pointer
2268 __ testl(rdx, rdx); // check if forward or backward branch
2269 __ jcc(Assembler::positive, dispatch); // count only if backward branch
2270
2271 // check if MethodCounters exists
2272 Label has_counters;
2273 __ movptr(rax, Address(rcx, Method::method_counters_offset()));
2274 __ testptr(rax, rax);
2275 __ jcc(Assembler::notZero, has_counters);
2276 __ push(rdx);
2277 __ push(rcx);
2278 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::build_method_counters),
2279 rcx);
2280 __ pop(rcx);
2281 __ pop(rdx);
2282 __ movptr(rax, Address(rcx, Method::method_counters_offset()));
2283 __ testptr(rax, rax);
2284 __ jcc(Assembler::zero, dispatch);
2285 __ bind(has_counters);
2286
2287 if (TieredCompilation) {
2288 Label no_mdo;
2289 int increment = InvocationCounter::count_increment;
2290 if (ProfileInterpreter) {
2291 // Are we profiling?
2292 __ movptr(rbx, Address(rcx, in_bytes(Method::method_data_offset())));
2293 __ testptr(rbx, rbx);
2294 __ jccb(Assembler::zero, no_mdo);
2295 // Increment the MDO backedge counter
2296 const Address mdo_backedge_counter(rbx, in_bytes(MethodData::backedge_counter_offset()) +
2297 in_bytes(InvocationCounter::counter_offset()));
2298 const Address mask(rbx, in_bytes(MethodData::backedge_mask_offset()));
2299 __ increment_mask_and_jump(mdo_backedge_counter, increment, mask, rax, false, Assembler::zero,
2300 UseOnStackReplacement ? &backedge_counter_overflow : NULL);
2301 __ jmp(dispatch);
2302 }
2303 __ bind(no_mdo);
2304 // Increment backedge counter in MethodCounters*
2305 __ movptr(rcx, Address(rcx, Method::method_counters_offset()));
2306 const Address mask(rcx, in_bytes(MethodCounters::backedge_mask_offset()));
2307 __ increment_mask_and_jump(Address(rcx, be_offset), increment, mask,
2308 rax, false, Assembler::zero,
2309 UseOnStackReplacement ? &backedge_counter_overflow : NULL);
2310 } else { // not TieredCompilation
2311 // increment counter
2312 __ movptr(rcx, Address(rcx, Method::method_counters_offset()));
2313 __ movl(rax, Address(rcx, be_offset)); // load backedge counter
2314 __ incrementl(rax, InvocationCounter::count_increment); // increment counter
2315 __ movl(Address(rcx, be_offset), rax); // store counter
2316
2317 __ movl(rax, Address(rcx, inv_offset)); // load invocation counter
2318
2319 __ andl(rax, InvocationCounter::count_mask_value); // and the status bits
2320 __ addl(rax, Address(rcx, be_offset)); // add both counters
2321
2322 if (ProfileInterpreter) {
2323 // Test to see if we should create a method data oop
2324 __ cmp32(rax, Address(rcx, in_bytes(MethodCounters::interpreter_profile_limit_offset())));
2325 __ jcc(Assembler::less, dispatch);
2326
2327 // if no method data exists, go to profile method
2328 __ test_method_data_pointer(rax, profile_method);
2329
2330 if (UseOnStackReplacement) {
2331 // check for overflow against rbx which is the MDO taken count
2332 __ cmp32(rbx, Address(rcx, in_bytes(MethodCounters::interpreter_backward_branch_limit_offset())));
2333 __ jcc(Assembler::below, dispatch);
2334
2335 // When ProfileInterpreter is on, the backedge_count comes
2336 // from the MethodData*, which value does not get reset on
2337 // the call to frequency_counter_overflow(). To avoid
2338 // excessive calls to the overflow routine while the method is
2339 // being compiled, add a second test to make sure the overflow
2340 // function is called only once every overflow_frequency.
2341 const int overflow_frequency = 1024;
2342 __ andl(rbx, overflow_frequency - 1);
2343 __ jcc(Assembler::zero, backedge_counter_overflow);
2344
2345 }
2346 } else {
2347 if (UseOnStackReplacement) {
2348 // check for overflow against rax, which is the sum of the
2349 // counters
2350 __ cmp32(rax, Address(rcx, in_bytes(MethodCounters::interpreter_backward_branch_limit_offset())));
2351 __ jcc(Assembler::aboveEqual, backedge_counter_overflow);
2352
2353 }
2354 }
2355 }
2356 __ bind(dispatch);
2357 }
2358
2359 // Pre-load the next target bytecode into rbx
2360 __ load_unsigned_byte(rbx, Address(rbcp, 0));
2361
2362 // continue with the bytecode @ target
2363 // rax: return bci for jsr's, unused otherwise
2364 // rbx: target bytecode
2365 // r13: target bcp
2366 __ dispatch_only(vtos, true);
2367
2368 if (UseLoopCounter) {
2369 if (ProfileInterpreter) {
2370 // Out-of-line code to allocate method data oop.
2371 __ bind(profile_method);
2372 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
2373 __ set_method_data_pointer_for_bcp();
2374 __ jmp(dispatch);
2375 }
2376
2377 if (UseOnStackReplacement) {
2378 // invocation counter overflow
2379 __ bind(backedge_counter_overflow);
2380 __ negptr(rdx);
2381 __ addptr(rdx, rbcp); // branch bcp
2382 // IcoResult frequency_counter_overflow([JavaThread*], address branch_bcp)
2383 __ call_VM(noreg,
2384 CAST_FROM_FN_PTR(address,
2385 InterpreterRuntime::frequency_counter_overflow),
2386 rdx);
2387
2388 // rax: osr nmethod (osr ok) or NULL (osr not possible)
2389 // rdx: scratch
2390 // r14: locals pointer
2391 // r13: bcp
2392 __ testptr(rax, rax); // test result
2393 __ jcc(Assembler::zero, dispatch); // no osr if null
2394 // nmethod may have been invalidated (VM may block upon call_VM return)
2395 __ cmpb(Address(rax, nmethod::state_offset()), nmethod::in_use);
2396 __ jcc(Assembler::notEqual, dispatch);
2397
2398 // We have the address of an on stack replacement routine in rax.
2399 // In preparation of invoking it, first we must migrate the locals
2400 // and monitors from off the interpreter frame on the stack.
2401 // Ensure to save the osr nmethod over the migration call,
2402 // it will be preserved in rbx.
2403 __ mov(rbx, rax);
2404
2405 NOT_LP64(__ get_thread(rcx));
2406
2407 call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_begin));
2408
2409 // rax is OSR buffer, move it to expected parameter location
2410 LP64_ONLY(__ mov(j_rarg0, rax));
2411 NOT_LP64(__ mov(rcx, rax));
2412 // We use j_rarg definitions here so that registers don't conflict as parameter
2413 // registers change across platforms as we are in the midst of a calling
2414 // sequence to the OSR nmethod and we don't want collision. These are NOT parameters.
2415
2416 const Register retaddr = LP64_ONLY(j_rarg2) NOT_LP64(rdi);
2417 const Register sender_sp = LP64_ONLY(j_rarg1) NOT_LP64(rdx);
2418
2419 // pop the interpreter frame
2420 __ movptr(sender_sp, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp
2421 __ leave(); // remove frame anchor
2422 __ pop(retaddr); // get return address
2423 __ mov(rsp, sender_sp); // set sp to sender sp
2424 // Ensure compiled code always sees stack at proper alignment
2425 __ andptr(rsp, -(StackAlignmentInBytes));
2426
2427 // unlike x86 we need no specialized return from compiled code
2428 // to the interpreter or the call stub.
2429
2430 // push the return address
2431 __ push(retaddr);
2432
2433 // and begin the OSR nmethod
2434 __ jmp(Address(rbx, nmethod::osr_entry_point_offset()));
2435 }
2436 }
2437 }
2438
2439 void TemplateTable::if_0cmp(Condition cc) {
2440 transition(itos, vtos);
2441 // assume branch is more often taken than not (loops use backward branches)
2442 Label not_taken;
2443 __ testl(rax, rax);
2444 __ jcc(j_not(cc), not_taken);
2445 branch(false, false);
2446 __ bind(not_taken);
2447 __ profile_not_taken_branch(rax);
2448 }
2449
2450 void TemplateTable::if_icmp(Condition cc) {
2451 transition(itos, vtos);
2452 // assume branch is more often taken than not (loops use backward branches)
2453 Label not_taken;
2454 __ pop_i(rdx);
2455 __ cmpl(rdx, rax);
2456 __ jcc(j_not(cc), not_taken);
2457 branch(false, false);
2458 __ bind(not_taken);
2459 __ profile_not_taken_branch(rax);
2460 }
2461
2462 void TemplateTable::if_nullcmp(Condition cc) {
2463 transition(atos, vtos);
2464 // assume branch is more often taken than not (loops use backward branches)
2465 Label not_taken;
2466 __ testptr(rax, rax);
2467 __ jcc(j_not(cc), not_taken);
2468 branch(false, false);
2469 __ bind(not_taken);
2470 __ profile_not_taken_branch(rax);
2471 }
2472
2473 void TemplateTable::if_acmp(Condition cc) {
2474 transition(atos, vtos);
2475 // assume branch is more often taken than not (loops use backward branches)
2476 Label taken, not_taken;
2477 __ pop_ptr(rdx);
2478
2479 const int is_value_mask = markWord::always_locked_pattern;
2480 if (EnableValhalla) {
2481 __ cmpoop(rdx, rax);
2482 __ jcc(Assembler::equal, (cc == equal) ? taken : not_taken);
2483
2484 // might be substitutable, test if either rax or rdx is null
2485 __ movptr(rbx, rdx);
2486 __ andptr(rbx, rax);
2487 __ testptr(rbx, rbx);
2488 __ jcc(Assembler::zero, (cc == equal) ? not_taken : taken);
2489
2490 // and both are values ?
2491 __ movptr(rbx, Address(rdx, oopDesc::mark_offset_in_bytes()));
2492 __ andptr(rbx, is_value_mask);
2493 __ movptr(rcx, Address(rax, oopDesc::mark_offset_in_bytes()));
2494 __ andptr(rbx, is_value_mask);
2495 __ andptr(rbx, rcx);
2496 __ cmpl(rbx, is_value_mask);
2497 __ jcc(Assembler::notEqual, (cc == equal) ? not_taken : taken);
2498
2499 // same value klass ?
2500 __ load_metadata(rbx, rdx);
2501 __ load_metadata(rcx, rax);
2502 __ cmpptr(rbx, rcx);
2503 __ jcc(Assembler::notEqual, (cc == equal) ? not_taken : taken);
2504
2505 // Know both are the same type, let's test for substitutability...
2506 if (cc == equal) {
2507 invoke_is_substitutable(rax, rdx, taken, not_taken);
2508 } else {
2509 invoke_is_substitutable(rax, rdx, not_taken, taken);
2510 }
2511 __ stop("Not reachable");
2512 }
2513
2514 __ cmpoop(rdx, rax);
2515 __ jcc(j_not(cc), not_taken);
2516 __ bind(taken);
2517 branch(false, false);
2518 __ bind(not_taken);
2519 __ profile_not_taken_branch(rax);
2520 }
2521
2522 void TemplateTable::invoke_is_substitutable(Register aobj, Register bobj,
2523 Label& is_subst, Label& not_subst) {
2524 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::is_substitutable), aobj, bobj);
2525 // Restored...rax answer, jmp to outcome...
2526 __ testl(rax, rax);
2527 __ jcc(Assembler::zero, not_subst);
2528 __ jmp(is_subst);
2529 }
2530
2531 void TemplateTable::ret() {
2532 transition(vtos, vtos);
2533 locals_index(rbx);
2534 LP64_ONLY(__ movslq(rbx, iaddress(rbx))); // get return bci, compute return bcp
2535 NOT_LP64(__ movptr(rbx, iaddress(rbx)));
2536 __ profile_ret(rbx, rcx);
2537 __ get_method(rax);
2538 __ movptr(rbcp, Address(rax, Method::const_offset()));
2539 __ lea(rbcp, Address(rbcp, rbx, Address::times_1,
2540 ConstMethod::codes_offset()));
2541 __ dispatch_next(vtos, 0, true);
2542 }
2543
2544 void TemplateTable::wide_ret() {
2545 transition(vtos, vtos);
2546 locals_index_wide(rbx);
2547 __ movptr(rbx, aaddress(rbx)); // get return bci, compute return bcp
2548 __ profile_ret(rbx, rcx);
2549 __ get_method(rax);
2550 __ movptr(rbcp, Address(rax, Method::const_offset()));
2551 __ lea(rbcp, Address(rbcp, rbx, Address::times_1, ConstMethod::codes_offset()));
2552 __ dispatch_next(vtos, 0, true);
2553 }
2554
2555 void TemplateTable::tableswitch() {
2556 Label default_case, continue_execution;
2557 transition(itos, vtos);
2558
2559 // align r13/rsi
2560 __ lea(rbx, at_bcp(BytesPerInt));
2561 __ andptr(rbx, -BytesPerInt);
2562 // load lo & hi
2563 __ movl(rcx, Address(rbx, BytesPerInt));
2564 __ movl(rdx, Address(rbx, 2 * BytesPerInt));
2565 __ bswapl(rcx);
2566 __ bswapl(rdx);
2567 // check against lo & hi
2568 __ cmpl(rax, rcx);
2569 __ jcc(Assembler::less, default_case);
2570 __ cmpl(rax, rdx);
2571 __ jcc(Assembler::greater, default_case);
2572 // lookup dispatch offset
2573 __ subl(rax, rcx);
2574 __ movl(rdx, Address(rbx, rax, Address::times_4, 3 * BytesPerInt));
2575 __ profile_switch_case(rax, rbx, rcx);
2576 // continue execution
2577 __ bind(continue_execution);
2578 __ bswapl(rdx);
2579 LP64_ONLY(__ movl2ptr(rdx, rdx));
2580 __ load_unsigned_byte(rbx, Address(rbcp, rdx, Address::times_1));
2581 __ addptr(rbcp, rdx);
2582 __ dispatch_only(vtos, true);
2583 // handle default
2584 __ bind(default_case);
2585 __ profile_switch_default(rax);
2586 __ movl(rdx, Address(rbx, 0));
2587 __ jmp(continue_execution);
2588 }
2589
2590 void TemplateTable::lookupswitch() {
2591 transition(itos, itos);
2592 __ stop("lookupswitch bytecode should have been rewritten");
2593 }
2594
2595 void TemplateTable::fast_linearswitch() {
2596 transition(itos, vtos);
2597 Label loop_entry, loop, found, continue_execution;
2598 // bswap rax so we can avoid bswapping the table entries
2599 __ bswapl(rax);
2600 // align r13
2601 __ lea(rbx, at_bcp(BytesPerInt)); // btw: should be able to get rid of
2602 // this instruction (change offsets
2603 // below)
2604 __ andptr(rbx, -BytesPerInt);
2605 // set counter
2606 __ movl(rcx, Address(rbx, BytesPerInt));
2607 __ bswapl(rcx);
2608 __ jmpb(loop_entry);
2609 // table search
2610 __ bind(loop);
2611 __ cmpl(rax, Address(rbx, rcx, Address::times_8, 2 * BytesPerInt));
2612 __ jcc(Assembler::equal, found);
2613 __ bind(loop_entry);
2614 __ decrementl(rcx);
2615 __ jcc(Assembler::greaterEqual, loop);
2616 // default case
2617 __ profile_switch_default(rax);
2618 __ movl(rdx, Address(rbx, 0));
2619 __ jmp(continue_execution);
2620 // entry found -> get offset
2621 __ bind(found);
2622 __ movl(rdx, Address(rbx, rcx, Address::times_8, 3 * BytesPerInt));
2623 __ profile_switch_case(rcx, rax, rbx);
2624 // continue execution
2625 __ bind(continue_execution);
2626 __ bswapl(rdx);
2627 __ movl2ptr(rdx, rdx);
2628 __ load_unsigned_byte(rbx, Address(rbcp, rdx, Address::times_1));
2629 __ addptr(rbcp, rdx);
2630 __ dispatch_only(vtos, true);
2631 }
2632
2633 void TemplateTable::fast_binaryswitch() {
2634 transition(itos, vtos);
2635 // Implementation using the following core algorithm:
2636 //
2637 // int binary_search(int key, LookupswitchPair* array, int n) {
2638 // // Binary search according to "Methodik des Programmierens" by
2639 // // Edsger W. Dijkstra and W.H.J. Feijen, Addison Wesley Germany 1985.
2640 // int i = 0;
2641 // int j = n;
2642 // while (i+1 < j) {
2643 // // invariant P: 0 <= i < j <= n and (a[i] <= key < a[j] or Q)
2644 // // with Q: for all i: 0 <= i < n: key < a[i]
2645 // // where a stands for the array and assuming that the (inexisting)
2646 // // element a[n] is infinitely big.
2647 // int h = (i + j) >> 1;
2648 // // i < h < j
2649 // if (key < array[h].fast_match()) {
2650 // j = h;
2651 // } else {
2652 // i = h;
2653 // }
2654 // }
2655 // // R: a[i] <= key < a[i+1] or Q
2656 // // (i.e., if key is within array, i is the correct index)
2657 // return i;
2658 // }
2659
2660 // Register allocation
2661 const Register key = rax; // already set (tosca)
2662 const Register array = rbx;
2663 const Register i = rcx;
2664 const Register j = rdx;
2665 const Register h = rdi;
2666 const Register temp = rsi;
2667
2668 // Find array start
2669 NOT_LP64(__ save_bcp());
2670
2671 __ lea(array, at_bcp(3 * BytesPerInt)); // btw: should be able to
2672 // get rid of this
2673 // instruction (change
2674 // offsets below)
2675 __ andptr(array, -BytesPerInt);
2676
2677 // Initialize i & j
2678 __ xorl(i, i); // i = 0;
2679 __ movl(j, Address(array, -BytesPerInt)); // j = length(array);
2680
2681 // Convert j into native byteordering
2682 __ bswapl(j);
2683
2684 // And start
2685 Label entry;
2686 __ jmp(entry);
2687
2688 // binary search loop
2689 {
2690 Label loop;
2691 __ bind(loop);
2692 // int h = (i + j) >> 1;
2693 __ leal(h, Address(i, j, Address::times_1)); // h = i + j;
2694 __ sarl(h, 1); // h = (i + j) >> 1;
2695 // if (key < array[h].fast_match()) {
2696 // j = h;
2697 // } else {
2698 // i = h;
2699 // }
2700 // Convert array[h].match to native byte-ordering before compare
2701 __ movl(temp, Address(array, h, Address::times_8));
2702 __ bswapl(temp);
2703 __ cmpl(key, temp);
2704 // j = h if (key < array[h].fast_match())
2705 __ cmov32(Assembler::less, j, h);
2706 // i = h if (key >= array[h].fast_match())
2707 __ cmov32(Assembler::greaterEqual, i, h);
2708 // while (i+1 < j)
2709 __ bind(entry);
2710 __ leal(h, Address(i, 1)); // i+1
2711 __ cmpl(h, j); // i+1 < j
2712 __ jcc(Assembler::less, loop);
2713 }
2714
2715 // end of binary search, result index is i (must check again!)
2716 Label default_case;
2717 // Convert array[i].match to native byte-ordering before compare
2718 __ movl(temp, Address(array, i, Address::times_8));
2719 __ bswapl(temp);
2720 __ cmpl(key, temp);
2721 __ jcc(Assembler::notEqual, default_case);
2722
2723 // entry found -> j = offset
2724 __ movl(j , Address(array, i, Address::times_8, BytesPerInt));
2725 __ profile_switch_case(i, key, array);
2726 __ bswapl(j);
2727 LP64_ONLY(__ movslq(j, j));
2728
2729 NOT_LP64(__ restore_bcp());
2730 NOT_LP64(__ restore_locals()); // restore rdi
2731
2732 __ load_unsigned_byte(rbx, Address(rbcp, j, Address::times_1));
2733 __ addptr(rbcp, j);
2734 __ dispatch_only(vtos, true);
2735
2736 // default case -> j = default offset
2737 __ bind(default_case);
2738 __ profile_switch_default(i);
2739 __ movl(j, Address(array, -2 * BytesPerInt));
2740 __ bswapl(j);
2741 LP64_ONLY(__ movslq(j, j));
2742
2743 NOT_LP64(__ restore_bcp());
2744 NOT_LP64(__ restore_locals());
2745
2746 __ load_unsigned_byte(rbx, Address(rbcp, j, Address::times_1));
2747 __ addptr(rbcp, j);
2748 __ dispatch_only(vtos, true);
2749 }
2750
2751 void TemplateTable::_return(TosState state) {
2752 transition(state, state);
2753
2754 assert(_desc->calls_vm(),
2755 "inconsistent calls_vm information"); // call in remove_activation
2756
2757 if (_desc->bytecode() == Bytecodes::_return_register_finalizer) {
2758 assert(state == vtos, "only valid state");
2759 Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rax);
2760 __ movptr(robj, aaddress(0));
2761 __ load_klass(rdi, robj);
2762 __ movl(rdi, Address(rdi, Klass::access_flags_offset()));
2763 __ testl(rdi, JVM_ACC_HAS_FINALIZER);
2764 Label skip_register_finalizer;
2765 __ jcc(Assembler::zero, skip_register_finalizer);
2766
2767 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::register_finalizer), robj);
2768
2769 __ bind(skip_register_finalizer);
2770 }
2771
2772 if (SafepointMechanism::uses_thread_local_poll() && _desc->bytecode() != Bytecodes::_return_register_finalizer) {
2773 Label no_safepoint;
2774 NOT_PRODUCT(__ block_comment("Thread-local Safepoint poll"));
2775 #ifdef _LP64
2776 __ testb(Address(r15_thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
2777 #else
2778 const Register thread = rdi;
2779 __ get_thread(thread);
2780 __ testb(Address(thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
2781 #endif
2782 __ jcc(Assembler::zero, no_safepoint);
2783 __ push(state);
2784 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
2785 InterpreterRuntime::at_safepoint));
2786 __ pop(state);
2787 __ bind(no_safepoint);
2788 }
2789
2790 // Narrow result if state is itos but result type is smaller.
2791 // Need to narrow in the return bytecode rather than in generate_return_entry
2792 // since compiled code callers expect the result to already be narrowed.
2793 if (state == itos) {
2794 __ narrow(rax);
2795 }
2796
2797 __ remove_activation(state, rbcp, true, true, true);
2798
2799 __ jmp(rbcp);
2800 }
2801
2802 // ----------------------------------------------------------------------------
2803 // Volatile variables demand their effects be made known to all CPU's
2804 // in order. Store buffers on most chips allow reads & writes to
2805 // reorder; the JMM's ReadAfterWrite.java test fails in -Xint mode
2806 // without some kind of memory barrier (i.e., it's not sufficient that
2807 // the interpreter does not reorder volatile references, the hardware
2808 // also must not reorder them).
2809 //
2810 // According to the new Java Memory Model (JMM):
2811 // (1) All volatiles are serialized wrt to each other. ALSO reads &
2812 // writes act as aquire & release, so:
2813 // (2) A read cannot let unrelated NON-volatile memory refs that
2814 // happen after the read float up to before the read. It's OK for
2815 // non-volatile memory refs that happen before the volatile read to
2816 // float down below it.
2817 // (3) Similar a volatile write cannot let unrelated NON-volatile
2818 // memory refs that happen BEFORE the write float down to after the
2819 // write. It's OK for non-volatile memory refs that happen after the
2820 // volatile write to float up before it.
2821 //
2822 // We only put in barriers around volatile refs (they are expensive),
2823 // not _between_ memory refs (that would require us to track the
2824 // flavor of the previous memory refs). Requirements (2) and (3)
2825 // require some barriers before volatile stores and after volatile
2826 // loads. These nearly cover requirement (1) but miss the
2827 // volatile-store-volatile-load case. This final case is placed after
2828 // volatile-stores although it could just as well go before
2829 // volatile-loads.
2830
2831 void TemplateTable::volatile_barrier(Assembler::Membar_mask_bits order_constraint ) {
2832 // Helper function to insert a is-volatile test and memory barrier
2833 __ membar(order_constraint);
2834 }
2835
2836 void TemplateTable::resolve_cache_and_index(int byte_no,
2837 Register cache,
2838 Register index,
2839 size_t index_size) {
2840 const Register temp = rbx;
2841 assert_different_registers(cache, index, temp);
2842
2843 Label L_clinit_barrier_slow;
2844 Label resolved;
2845
2846 Bytecodes::Code code = bytecode();
2847 switch (code) {
2848 case Bytecodes::_nofast_getfield: code = Bytecodes::_getfield; break;
2849 case Bytecodes::_nofast_putfield: code = Bytecodes::_putfield; break;
2850 default: break;
2851 }
2852
2853 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");
2854 __ get_cache_and_index_and_bytecode_at_bcp(cache, index, temp, byte_no, 1, index_size);
2855 __ cmpl(temp, code); // have we resolved this bytecode?
2856 __ jcc(Assembler::equal, resolved);
2857
2858 // resolve first time through
2859 // Class initialization barrier slow path lands here as well.
2860 __ bind(L_clinit_barrier_slow);
2861 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_from_cache);
2862 __ movl(temp, code);
2863 __ call_VM(noreg, entry, temp);
2864 // Update registers with resolved info
2865 __ get_cache_and_index_at_bcp(cache, index, 1, index_size);
2866
2867 __ bind(resolved);
2868
2869 // Class initialization barrier for static methods
2870 if (VM_Version::supports_fast_class_init_checks() && bytecode() == Bytecodes::_invokestatic) {
2871 const Register method = temp;
2872 const Register klass = temp;
2873 const Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg);
2874 assert(thread != noreg, "x86_32 not supported");
2875
2876 __ load_resolved_method_at_index(byte_no, method, cache, index);
2877 __ load_method_holder(klass, method);
2878 __ clinit_barrier(klass, thread, NULL /*L_fast_path*/, &L_clinit_barrier_slow);
2879 }
2880 }
2881
2882 // The cache and index registers must be set before call
2883 void TemplateTable::load_field_cp_cache_entry(Register obj,
2884 Register cache,
2885 Register index,
2886 Register off,
2887 Register flags,
2888 bool is_static = false) {
2889 assert_different_registers(cache, index, flags, off);
2890
2891 ByteSize cp_base_offset = ConstantPoolCache::base_offset();
2892 // Field offset
2893 __ movptr(off, Address(cache, index, Address::times_ptr,
2894 in_bytes(cp_base_offset +
2895 ConstantPoolCacheEntry::f2_offset())));
2896 // Flags
2897 __ movl(flags, Address(cache, index, Address::times_ptr,
2898 in_bytes(cp_base_offset +
2899 ConstantPoolCacheEntry::flags_offset())));
2900
2901 // klass overwrite register
2902 if (is_static) {
2903 __ movptr(obj, Address(cache, index, Address::times_ptr,
2904 in_bytes(cp_base_offset +
2905 ConstantPoolCacheEntry::f1_offset())));
2906 const int mirror_offset = in_bytes(Klass::java_mirror_offset());
2907 __ movptr(obj, Address(obj, mirror_offset));
2908 __ resolve_oop_handle(obj);
2909 }
2910 }
2911
2912 void TemplateTable::load_invoke_cp_cache_entry(int byte_no,
2913 Register method,
2914 Register itable_index,
2915 Register flags,
2916 bool is_invokevirtual,
2917 bool is_invokevfinal, /*unused*/
2918 bool is_invokedynamic) {
2919 // setup registers
2920 const Register cache = rcx;
2921 const Register index = rdx;
2922 assert_different_registers(method, flags);
2923 assert_different_registers(method, cache, index);
2924 assert_different_registers(itable_index, flags);
2925 assert_different_registers(itable_index, cache, index);
2926 // determine constant pool cache field offsets
2927 assert(is_invokevirtual == (byte_no == f2_byte), "is_invokevirtual flag redundant");
2928 const int flags_offset = in_bytes(ConstantPoolCache::base_offset() +
2929 ConstantPoolCacheEntry::flags_offset());
2930 // access constant pool cache fields
2931 const int index_offset = in_bytes(ConstantPoolCache::base_offset() +
2932 ConstantPoolCacheEntry::f2_offset());
2933
2934 size_t index_size = (is_invokedynamic ? sizeof(u4) : sizeof(u2));
2935 resolve_cache_and_index(byte_no, cache, index, index_size);
2936 __ load_resolved_method_at_index(byte_no, method, cache, index);
2937
2938 if (itable_index != noreg) {
2939 // pick up itable or appendix index from f2 also:
2940 __ movptr(itable_index, Address(cache, index, Address::times_ptr, index_offset));
2941 }
2942 __ movl(flags, Address(cache, index, Address::times_ptr, flags_offset));
2943 }
2944
2945 // The registers cache and index expected to be set before call.
2946 // Correct values of the cache and index registers are preserved.
2947 void TemplateTable::jvmti_post_field_access(Register cache,
2948 Register index,
2949 bool is_static,
2950 bool has_tos) {
2951 if (JvmtiExport::can_post_field_access()) {
2952 // Check to see if a field access watch has been set before we take
2953 // the time to call into the VM.
2954 Label L1;
2955 assert_different_registers(cache, index, rax);
2956 __ mov32(rax, ExternalAddress((address) JvmtiExport::get_field_access_count_addr()));
2957 __ testl(rax,rax);
2958 __ jcc(Assembler::zero, L1);
2959
2960 // cache entry pointer
2961 __ addptr(cache, in_bytes(ConstantPoolCache::base_offset()));
2962 __ shll(index, LogBytesPerWord);
2963 __ addptr(cache, index);
2964 if (is_static) {
2965 __ xorptr(rax, rax); // NULL object reference
2966 } else {
2967 __ pop(atos); // Get the object
2968 __ verify_oop(rax);
2969 __ push(atos); // Restore stack state
2970 }
2971 // rax,: object pointer or NULL
2972 // cache: cache entry pointer
2973 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access),
2974 rax, cache);
2975 __ get_cache_and_index_at_bcp(cache, index, 1);
2976 __ bind(L1);
2977 }
2978 }
2979
2980 void TemplateTable::pop_and_check_object(Register r) {
2981 __ pop_ptr(r);
2982 __ null_check(r); // for field access must check obj.
2983 __ verify_oop(r);
2984 }
2985
2986 void TemplateTable::getfield_or_static(int byte_no, bool is_static, RewriteControl rc) {
2987 transition(vtos, vtos);
2988
2989 const Register cache = rcx;
2990 const Register index = rdx;
2991 const Register obj = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
2992 const Register off = rbx;
2993 const Register flags = rax;
2994 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // uses same reg as obj, so don't mix them
2995 const Register flags2 = rdx;
2996
2997 resolve_cache_and_index(byte_no, cache, index, sizeof(u2));
2998 jvmti_post_field_access(cache, index, is_static, false);
2999 load_field_cp_cache_entry(obj, cache, index, off, flags, is_static);
3000
3001 const Address field(obj, off, Address::times_1, 0*wordSize);
3002
3003 Label Done, notByte, notBool, notInt, notShort, notChar, notLong, notFloat, notObj, notValueType;
3004
3005 if (!is_static) {
3006 __ movptr(rcx, Address(cache, index, Address::times_ptr,
3007 in_bytes(ConstantPoolCache::base_offset() +
3008 ConstantPoolCacheEntry::f1_offset())));
3009 }
3010
3011 __ movl(flags2, flags);
3012
3013 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift);
3014 // Make sure we don't need to mask edx after the above shift
3015 assert(btos == 0, "change code, btos != 0");
3016
3017 __ andl(flags, ConstantPoolCacheEntry::tos_state_mask);
3018
3019 __ jcc(Assembler::notZero, notByte);
3020 // btos
3021 if (!is_static) pop_and_check_object(obj);
3022 __ access_load_at(T_BYTE, IN_HEAP, rax, field, noreg, noreg);
3023 __ push(btos);
3024 // Rewrite bytecode to be faster
3025 if (!is_static && rc == may_rewrite) {
3026 patch_bytecode(Bytecodes::_fast_bgetfield, bc, rbx);
3027 }
3028 __ jmp(Done);
3029
3030 __ bind(notByte);
3031
3032 __ cmpl(flags, ztos);
3033 __ jcc(Assembler::notEqual, notBool);
3034 if (!is_static) pop_and_check_object(obj);
3035 // ztos (same code as btos)
3036 __ access_load_at(T_BOOLEAN, IN_HEAP, rax, field, noreg, noreg);
3037 __ push(ztos);
3038 // Rewrite bytecode to be faster
3039 if (!is_static && rc == may_rewrite) {
3040 // use btos rewriting, no truncating to t/f bit is needed for getfield.
3041 patch_bytecode(Bytecodes::_fast_bgetfield, bc, rbx);
3042 }
3043 __ jmp(Done);
3044
3045 __ bind(notBool);
3046 __ cmpl(flags, atos);
3047 __ jcc(Assembler::notEqual, notObj);
3048 // atos
3049 if (!EnableValhalla) {
3050 if (!is_static) pop_and_check_object(obj);
3051 do_oop_load(_masm, field, rax);
3052 __ push(atos);
3053 if (!is_static && rc == may_rewrite) {
3054 patch_bytecode(Bytecodes::_fast_agetfield, bc, rbx);
3055 }
3056 __ jmp(Done);
3057 } else {
3058 if (is_static) {
3059 __ load_heap_oop(rax, field);
3060 Label isFlattenable, uninitialized;
3061 // Issue below if the static field has not been initialized yet
3062 __ test_field_is_flattenable(flags2, rscratch1, isFlattenable);
3063 // Not flattenable case
3064 __ push(atos);
3065 __ jmp(Done);
3066 // Flattenable case, must not return null even if uninitialized
3067 __ bind(isFlattenable);
3068 __ testptr(rax, rax);
3069 __ jcc(Assembler::zero, uninitialized);
3070 __ push(atos);
3071 __ jmp(Done);
3072 __ bind(uninitialized);
3073 __ andl(flags2, ConstantPoolCacheEntry::field_index_mask);
3074 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::uninitialized_static_value_field),
3075 obj, flags2);
3076 __ verify_oop(rax);
3077 __ push(atos);
3078 __ jmp(Done);
3079 } else {
3080 Label isFlattened, nonnull, isFlattenable, rewriteFlattenable;
3081 __ test_field_is_flattenable(flags2, rscratch1, isFlattenable);
3082 // Non-flattenable field case, also covers the object case
3083 pop_and_check_object(obj);
3084 __ load_heap_oop(rax, field);
3085 __ push(atos);
3086 if (rc == may_rewrite) {
3087 patch_bytecode(Bytecodes::_fast_agetfield, bc, rbx);
3088 }
3089 __ jmp(Done);
3090 __ bind(isFlattenable);
3091 __ test_field_is_flattened(flags2, rscratch1, isFlattened);
3092 // Non-flattened field case
3093 pop_and_check_object(obj);
3094 __ load_heap_oop(rax, field);
3095 __ testptr(rax, rax);
3096 __ jcc(Assembler::notZero, nonnull);
3097 __ andl(flags2, ConstantPoolCacheEntry::field_index_mask);
3098 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::uninitialized_instance_value_field),
3099 obj, flags2);
3100 __ bind(nonnull);
3101 __ verify_oop(rax);
3102 __ push(atos);
3103 __ jmp(rewriteFlattenable);
3104 __ bind(isFlattened);
3105 __ andl(flags2, ConstantPoolCacheEntry::field_index_mask);
3106 pop_and_check_object(rax);
3107 __ read_flattened_field(rcx, flags2, rbx, rax);
3108 __ verify_oop(rax);
3109 __ push(atos);
3110 __ bind(rewriteFlattenable);
3111 if (rc == may_rewrite) {
3112 patch_bytecode(Bytecodes::_fast_qgetfield, bc, rbx);
3113 }
3114 __ jmp(Done);
3115 }
3116 }
3117
3118 __ bind(notObj);
3119
3120 if (!is_static) pop_and_check_object(obj);
3121
3122 __ cmpl(flags, itos);
3123 __ jcc(Assembler::notEqual, notInt);
3124 // itos
3125 __ access_load_at(T_INT, IN_HEAP, rax, field, noreg, noreg);
3126 __ push(itos);
3127 // Rewrite bytecode to be faster
3128 if (!is_static && rc == may_rewrite) {
3129 patch_bytecode(Bytecodes::_fast_igetfield, bc, rbx);
3130 }
3131 __ jmp(Done);
3132
3133 __ bind(notInt);
3134 __ cmpl(flags, ctos);
3135 __ jcc(Assembler::notEqual, notChar);
3136 // ctos
3137 __ access_load_at(T_CHAR, IN_HEAP, rax, field, noreg, noreg);
3138 __ push(ctos);
3139 // Rewrite bytecode to be faster
3140 if (!is_static && rc == may_rewrite) {
3141 patch_bytecode(Bytecodes::_fast_cgetfield, bc, rbx);
3142 }
3143 __ jmp(Done);
3144
3145 __ bind(notChar);
3146 __ cmpl(flags, stos);
3147 __ jcc(Assembler::notEqual, notShort);
3148 // stos
3149 __ access_load_at(T_SHORT, IN_HEAP, rax, field, noreg, noreg);
3150 __ push(stos);
3151 // Rewrite bytecode to be faster
3152 if (!is_static && rc == may_rewrite) {
3153 patch_bytecode(Bytecodes::_fast_sgetfield, bc, rbx);
3154 }
3155 __ jmp(Done);
3156
3157 __ bind(notShort);
3158 __ cmpl(flags, ltos);
3159 __ jcc(Assembler::notEqual, notLong);
3160 // ltos
3161 // Generate code as if volatile (x86_32). There just aren't enough registers to
3162 // save that information and this code is faster than the test.
3163 __ access_load_at(T_LONG, IN_HEAP | MO_RELAXED, noreg /* ltos */, field, noreg, noreg);
3164 __ push(ltos);
3165 // Rewrite bytecode to be faster
3166 LP64_ONLY(if (!is_static && rc == may_rewrite) patch_bytecode(Bytecodes::_fast_lgetfield, bc, rbx));
3167 __ jmp(Done);
3168
3169 __ bind(notLong);
3170 __ cmpl(flags, ftos);
3171 __ jcc(Assembler::notEqual, notFloat);
3172 // ftos
3173
3174 __ access_load_at(T_FLOAT, IN_HEAP, noreg /* ftos */, field, noreg, noreg);
3175 __ push(ftos);
3176 // Rewrite bytecode to be faster
3177 if (!is_static && rc == may_rewrite) {
3178 patch_bytecode(Bytecodes::_fast_fgetfield, bc, rbx);
3179 }
3180 __ jmp(Done);
3181
3182 __ bind(notFloat);
3183 #ifdef ASSERT
3184 Label notDouble;
3185 __ cmpl(flags, dtos);
3186 __ jcc(Assembler::notEqual, notDouble);
3187 #endif
3188 // dtos
3189 // MO_RELAXED: for the case of volatile field, in fact it adds no extra work for the underlying implementation
3190 __ access_load_at(T_DOUBLE, IN_HEAP | MO_RELAXED, noreg /* dtos */, field, noreg, noreg);
3191 __ push(dtos);
3192 // Rewrite bytecode to be faster
3193 if (!is_static && rc == may_rewrite) {
3194 patch_bytecode(Bytecodes::_fast_dgetfield, bc, rbx);
3195 }
3196 #ifdef ASSERT
3197 __ jmp(Done);
3198
3199 __ bind(notDouble);
3200 __ stop("Bad state");
3201 #endif
3202
3203 __ bind(Done);
3204 // [jk] not needed currently
3205 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadLoad |
3206 // Assembler::LoadStore));
3207 }
3208
3209 void TemplateTable::getfield(int byte_no) {
3210 getfield_or_static(byte_no, false);
3211 }
3212
3213 void TemplateTable::nofast_getfield(int byte_no) {
3214 getfield_or_static(byte_no, false, may_not_rewrite);
3215 }
3216
3217 void TemplateTable::getstatic(int byte_no) {
3218 getfield_or_static(byte_no, true);
3219 }
3220
3221 void TemplateTable::withfield() {
3222 transition(vtos, atos);
3223
3224 Register cache = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
3225 Register index = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
3226
3227 resolve_cache_and_index(f2_byte, cache, index, sizeof(u2));
3228
3229 call_VM(rbx, CAST_FROM_FN_PTR(address, InterpreterRuntime::withfield), cache);
3230 // new value type is returned in rbx
3231 // stack adjustement is returned in rax
3232 __ verify_oop(rbx);
3233 __ addptr(rsp, rax);
3234 __ movptr(rax, rbx);
3235 }
3236
3237 // The registers cache and index expected to be set before call.
3238 // The function may destroy various registers, just not the cache and index registers.
3239 void TemplateTable::jvmti_post_field_mod(Register cache, Register index, bool is_static) {
3240
3241 const Register robj = LP64_ONLY(c_rarg2) NOT_LP64(rax);
3242 const Register RBX = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
3243 const Register RCX = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
3244 const Register RDX = LP64_ONLY(rscratch1) NOT_LP64(rdx);
3245
3246 ByteSize cp_base_offset = ConstantPoolCache::base_offset();
3247
3248 if (JvmtiExport::can_post_field_modification()) {
3249 // Check to see if a field modification watch has been set before
3250 // we take the time to call into the VM.
3251 Label L1;
3252 assert_different_registers(cache, index, rax);
3253 __ mov32(rax, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr()));
3254 __ testl(rax, rax);
3255 __ jcc(Assembler::zero, L1);
3256
3257 __ get_cache_and_index_at_bcp(robj, RDX, 1);
3258
3259
3260 if (is_static) {
3261 // Life is simple. Null out the object pointer.
3262 __ xorl(RBX, RBX);
3263
3264 } else {
3265 // Life is harder. The stack holds the value on top, followed by
3266 // the object. We don't know the size of the value, though; it
3267 // could be one or two words depending on its type. As a result,
3268 // we must find the type to determine where the object is.
3269 #ifndef _LP64
3270 Label two_word, valsize_known;
3271 #endif
3272 __ movl(RCX, Address(robj, RDX,
3273 Address::times_ptr,
3274 in_bytes(cp_base_offset +
3275 ConstantPoolCacheEntry::flags_offset())));
3276 NOT_LP64(__ mov(rbx, rsp));
3277 __ shrl(RCX, ConstantPoolCacheEntry::tos_state_shift);
3278
3279 // Make sure we don't need to mask rcx after the above shift
3280 ConstantPoolCacheEntry::verify_tos_state_shift();
3281 #ifdef _LP64
3282 __ movptr(c_rarg1, at_tos_p1()); // initially assume a one word jvalue
3283 __ cmpl(c_rarg3, ltos);
3284 __ cmovptr(Assembler::equal,
3285 c_rarg1, at_tos_p2()); // ltos (two word jvalue)
3286 __ cmpl(c_rarg3, dtos);
3287 __ cmovptr(Assembler::equal,
3288 c_rarg1, at_tos_p2()); // dtos (two word jvalue)
3289 #else
3290 __ cmpl(rcx, ltos);
3291 __ jccb(Assembler::equal, two_word);
3292 __ cmpl(rcx, dtos);
3293 __ jccb(Assembler::equal, two_word);
3294 __ addptr(rbx, Interpreter::expr_offset_in_bytes(1)); // one word jvalue (not ltos, dtos)
3295 __ jmpb(valsize_known);
3296
3297 __ bind(two_word);
3298 __ addptr(rbx, Interpreter::expr_offset_in_bytes(2)); // two words jvalue
3299
3300 __ bind(valsize_known);
3301 // setup object pointer
3302 __ movptr(rbx, Address(rbx, 0));
3303 #endif
3304 }
3305 // cache entry pointer
3306 __ addptr(robj, in_bytes(cp_base_offset));
3307 __ shll(RDX, LogBytesPerWord);
3308 __ addptr(robj, RDX);
3309 // object (tos)
3310 __ mov(RCX, rsp);
3311 // c_rarg1: object pointer set up above (NULL if static)
3312 // c_rarg2: cache entry pointer
3313 // c_rarg3: jvalue object on the stack
3314 __ call_VM(noreg,
3315 CAST_FROM_FN_PTR(address,
3316 InterpreterRuntime::post_field_modification),
3317 RBX, robj, RCX);
3318 __ get_cache_and_index_at_bcp(cache, index, 1);
3319 __ bind(L1);
3320 }
3321 }
3322
3323 void TemplateTable::putfield_or_static(int byte_no, bool is_static, RewriteControl rc) {
3324 transition(vtos, vtos);
3325
3326 const Register cache = rcx;
3327 const Register index = rdx;
3328 const Register obj = rcx;
3329 const Register off = rbx;
3330 const Register flags = rax;
3331 const Register flags2 = rdx;
3332
3333 resolve_cache_and_index(byte_no, cache, index, sizeof(u2));
3334 jvmti_post_field_mod(cache, index, is_static);
3335 load_field_cp_cache_entry(obj, cache, index, off, flags, is_static);
3336
3337 // [jk] not needed currently
3338 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadStore |
3339 // Assembler::StoreStore));
3340
3341 Label notVolatile, Done;
3342 __ movl(rdx, flags);
3343 __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift);
3344 __ andl(rdx, 0x1);
3345
3346 // Check for volatile store
3347 __ testl(rdx, rdx);
3348 __ movl(flags2, flags);
3349 __ jcc(Assembler::zero, notVolatile);
3350
3351 putfield_or_static_helper(byte_no, is_static, rc, obj, off, flags, flags2);
3352 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad |
3353 Assembler::StoreStore));
3354 __ jmp(Done);
3355 __ bind(notVolatile);
3356
3357 putfield_or_static_helper(byte_no, is_static, rc, obj, off, flags, flags2);
3358
3359 __ bind(Done);
3360 }
3361
3362 void TemplateTable::putfield_or_static_helper(int byte_no, bool is_static, RewriteControl rc,
3363 Register obj, Register off, Register flags, Register flags2) {
3364
3365 // field addresses
3366 const Address field(obj, off, Address::times_1, 0*wordSize);
3367 NOT_LP64( const Address hi(obj, off, Address::times_1, 1*wordSize);)
3368
3369 Label notByte, notBool, notInt, notShort, notChar,
3370 notLong, notFloat, notObj, notValueType;
3371 Label Done;
3372
3373 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
3374
3375 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift);
3376
3377 assert(btos == 0, "change code, btos != 0");
3378 __ andl(flags, ConstantPoolCacheEntry::tos_state_mask);
3379 __ jcc(Assembler::notZero, notByte);
3380
3381 // btos
3382 {
3383 __ pop(btos);
3384 if (!is_static) pop_and_check_object(obj);
3385 __ access_store_at(T_BYTE, IN_HEAP, field, rax, noreg, noreg);
3386 if (!is_static && rc == may_rewrite) {
3387 patch_bytecode(Bytecodes::_fast_bputfield, bc, rbx, true, byte_no);
3388 }
3389 __ jmp(Done);
3390 }
3391
3392 __ bind(notByte);
3393 __ cmpl(flags, ztos);
3394 __ jcc(Assembler::notEqual, notBool);
3395
3396 // ztos
3397 {
3398 __ pop(ztos);
3399 if (!is_static) pop_and_check_object(obj);
3400 __ access_store_at(T_BOOLEAN, IN_HEAP, field, rax, noreg, noreg);
3401 if (!is_static && rc == may_rewrite) {
3402 patch_bytecode(Bytecodes::_fast_zputfield, bc, rbx, true, byte_no);
3403 }
3404 __ jmp(Done);
3405 }
3406
3407 __ bind(notBool);
3408 __ cmpl(flags, atos);
3409 __ jcc(Assembler::notEqual, notObj);
3410
3411 // atos
3412 {
3413 if (!EnableValhalla) {
3414 __ pop(atos);
3415 if (!is_static) pop_and_check_object(obj);
3416 // Store into the field
3417 do_oop_store(_masm, field, rax);
3418 if (!is_static && rc == may_rewrite) {
3419 patch_bytecode(Bytecodes::_fast_aputfield, bc, rbx, true, byte_no);
3420 }
3421 __ jmp(Done);
3422 } else {
3423 __ pop(atos);
3424 if (is_static) {
3425 Label notFlattenable, notBuffered;
3426 __ test_field_is_not_flattenable(flags2, rscratch1, notFlattenable);
3427 __ null_check(rax);
3428 __ bind(notFlattenable);
3429 do_oop_store(_masm, field, rax);
3430 __ jmp(Done);
3431 } else {
3432 Label isFlattenable, isFlattened, notBuffered, notBuffered2, rewriteNotFlattenable, rewriteFlattenable;
3433 __ test_field_is_flattenable(flags2, rscratch1, isFlattenable);
3434 // Not flattenable case, covers not flattenable values and objects
3435 pop_and_check_object(obj);
3436 // Store into the field
3437 do_oop_store(_masm, field, rax);
3438 __ bind(rewriteNotFlattenable);
3439 if (rc == may_rewrite) {
3440 patch_bytecode(Bytecodes::_fast_aputfield, bc, rbx, true, byte_no);
3441 }
3442 __ jmp(Done);
3443 // Implementation of the flattenable semantic
3444 __ bind(isFlattenable);
3445 __ null_check(rax);
3446 __ test_field_is_flattened(flags2, rscratch1, isFlattened);
3447 // Not flattened case
3448 pop_and_check_object(obj);
3449 // Store into the field
3450 do_oop_store(_masm, field, rax);
3451 __ jmp(rewriteFlattenable);
3452 __ bind(isFlattened);
3453 pop_and_check_object(obj);
3454 assert_different_registers(rax, rdx, obj, off);
3455 __ load_klass(rdx, rax);
3456 __ data_for_oop(rax, rax, rdx);
3457 __ addptr(obj, off);
3458 __ access_value_copy(IN_HEAP, rax, obj, rdx);
3459 __ bind(rewriteFlattenable);
3460 if (rc == may_rewrite) {
3461 patch_bytecode(Bytecodes::_fast_qputfield, bc, rbx, true, byte_no);
3462 }
3463 __ jmp(Done);
3464 }
3465 }
3466 }
3467
3468 __ bind(notObj);
3469 __ cmpl(flags, itos);
3470 __ jcc(Assembler::notEqual, notInt);
3471
3472 // itos
3473 {
3474 __ pop(itos);
3475 if (!is_static) pop_and_check_object(obj);
3476 __ access_store_at(T_INT, IN_HEAP, field, rax, noreg, noreg);
3477 if (!is_static && rc == may_rewrite) {
3478 patch_bytecode(Bytecodes::_fast_iputfield, bc, rbx, true, byte_no);
3479 }
3480 __ jmp(Done);
3481 }
3482
3483 __ bind(notInt);
3484 __ cmpl(flags, ctos);
3485 __ jcc(Assembler::notEqual, notChar);
3486
3487 // ctos
3488 {
3489 __ pop(ctos);
3490 if (!is_static) pop_and_check_object(obj);
3491 __ access_store_at(T_CHAR, IN_HEAP, field, rax, noreg, noreg);
3492 if (!is_static && rc == may_rewrite) {
3493 patch_bytecode(Bytecodes::_fast_cputfield, bc, rbx, true, byte_no);
3494 }
3495 __ jmp(Done);
3496 }
3497
3498 __ bind(notChar);
3499 __ cmpl(flags, stos);
3500 __ jcc(Assembler::notEqual, notShort);
3501
3502 // stos
3503 {
3504 __ pop(stos);
3505 if (!is_static) pop_and_check_object(obj);
3506 __ access_store_at(T_SHORT, IN_HEAP, field, rax, noreg, noreg);
3507 if (!is_static && rc == may_rewrite) {
3508 patch_bytecode(Bytecodes::_fast_sputfield, bc, rbx, true, byte_no);
3509 }
3510 __ jmp(Done);
3511 }
3512
3513 __ bind(notShort);
3514 __ cmpl(flags, ltos);
3515 __ jcc(Assembler::notEqual, notLong);
3516
3517 // ltos
3518 {
3519 __ pop(ltos);
3520 if (!is_static) pop_and_check_object(obj);
3521 // MO_RELAXED: generate atomic store for the case of volatile field (important for x86_32)
3522 __ access_store_at(T_LONG, IN_HEAP | MO_RELAXED, field, noreg /* ltos*/, noreg, noreg);
3523 #ifdef _LP64
3524 if (!is_static && rc == may_rewrite) {
3525 patch_bytecode(Bytecodes::_fast_lputfield, bc, rbx, true, byte_no);
3526 }
3527 #endif // _LP64
3528 __ jmp(Done);
3529 }
3530
3531 __ bind(notLong);
3532 __ cmpl(flags, ftos);
3533 __ jcc(Assembler::notEqual, notFloat);
3534
3535 // ftos
3536 {
3537 __ pop(ftos);
3538 if (!is_static) pop_and_check_object(obj);
3539 __ access_store_at(T_FLOAT, IN_HEAP, field, noreg /* ftos */, noreg, noreg);
3540 if (!is_static && rc == may_rewrite) {
3541 patch_bytecode(Bytecodes::_fast_fputfield, bc, rbx, true, byte_no);
3542 }
3543 __ jmp(Done);
3544 }
3545
3546 __ bind(notFloat);
3547 #ifdef ASSERT
3548 Label notDouble;
3549 __ cmpl(flags, dtos);
3550 __ jcc(Assembler::notEqual, notDouble);
3551 #endif
3552
3553 // dtos
3554 {
3555 __ pop(dtos);
3556 if (!is_static) pop_and_check_object(obj);
3557 // MO_RELAXED: for the case of volatile field, in fact it adds no extra work for the underlying implementation
3558 __ access_store_at(T_DOUBLE, IN_HEAP | MO_RELAXED, field, noreg /* dtos */, noreg, noreg);
3559 if (!is_static && rc == may_rewrite) {
3560 patch_bytecode(Bytecodes::_fast_dputfield, bc, rbx, true, byte_no);
3561 }
3562 }
3563
3564 #ifdef ASSERT
3565 __ jmp(Done);
3566
3567 __ bind(notDouble);
3568 __ stop("Bad state");
3569 #endif
3570
3571 __ bind(Done);
3572 }
3573
3574 void TemplateTable::putfield(int byte_no) {
3575 putfield_or_static(byte_no, false);
3576 }
3577
3578 void TemplateTable::nofast_putfield(int byte_no) {
3579 putfield_or_static(byte_no, false, may_not_rewrite);
3580 }
3581
3582 void TemplateTable::putstatic(int byte_no) {
3583 putfield_or_static(byte_no, true);
3584 }
3585
3586 void TemplateTable::jvmti_post_fast_field_mod() {
3587
3588 const Register scratch = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
3589
3590 if (JvmtiExport::can_post_field_modification()) {
3591 // Check to see if a field modification watch has been set before
3592 // we take the time to call into the VM.
3593 Label L2;
3594 __ mov32(scratch, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr()));
3595 __ testl(scratch, scratch);
3596 __ jcc(Assembler::zero, L2);
3597 __ pop_ptr(rbx); // copy the object pointer from tos
3598 __ verify_oop(rbx);
3599 __ push_ptr(rbx); // put the object pointer back on tos
3600 // Save tos values before call_VM() clobbers them. Since we have
3601 // to do it for every data type, we use the saved values as the
3602 // jvalue object.
3603 switch (bytecode()) { // load values into the jvalue object
3604 case Bytecodes::_fast_qputfield: //fall through
3605 case Bytecodes::_fast_aputfield: __ push_ptr(rax); break;
3606 case Bytecodes::_fast_bputfield: // fall through
3607 case Bytecodes::_fast_zputfield: // fall through
3608 case Bytecodes::_fast_sputfield: // fall through
3609 case Bytecodes::_fast_cputfield: // fall through
3610 case Bytecodes::_fast_iputfield: __ push_i(rax); break;
3611 case Bytecodes::_fast_dputfield: __ push(dtos); break;
3612 case Bytecodes::_fast_fputfield: __ push(ftos); break;
3613 case Bytecodes::_fast_lputfield: __ push_l(rax); break;
3614
3615 default:
3616 ShouldNotReachHere();
3617 }
3618 __ mov(scratch, rsp); // points to jvalue on the stack
3619 // access constant pool cache entry
3620 LP64_ONLY(__ get_cache_entry_pointer_at_bcp(c_rarg2, rax, 1));
3621 NOT_LP64(__ get_cache_entry_pointer_at_bcp(rax, rdx, 1));
3622 __ verify_oop(rbx);
3623 // rbx: object pointer copied above
3624 // c_rarg2: cache entry pointer
3625 // c_rarg3: jvalue object on the stack
3626 LP64_ONLY(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification), rbx, c_rarg2, c_rarg3));
3627 NOT_LP64(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification), rbx, rax, rcx));
3628
3629 switch (bytecode()) { // restore tos values
3630 case Bytecodes::_fast_qputfield: // fall through
3631 case Bytecodes::_fast_aputfield: __ pop_ptr(rax); break;
3632 case Bytecodes::_fast_bputfield: // fall through
3633 case Bytecodes::_fast_zputfield: // fall through
3634 case Bytecodes::_fast_sputfield: // fall through
3635 case Bytecodes::_fast_cputfield: // fall through
3636 case Bytecodes::_fast_iputfield: __ pop_i(rax); break;
3637 case Bytecodes::_fast_dputfield: __ pop(dtos); break;
3638 case Bytecodes::_fast_fputfield: __ pop(ftos); break;
3639 case Bytecodes::_fast_lputfield: __ pop_l(rax); break;
3640 default: break;
3641 }
3642 __ bind(L2);
3643 }
3644 }
3645
3646 void TemplateTable::fast_storefield(TosState state) {
3647 transition(state, vtos);
3648
3649 ByteSize base = ConstantPoolCache::base_offset();
3650
3651 jvmti_post_fast_field_mod();
3652
3653 // access constant pool cache
3654 __ get_cache_and_index_at_bcp(rcx, rbx, 1);
3655
3656 // test for volatile with rdx but rdx is tos register for lputfield.
3657 __ movl(rdx, Address(rcx, rbx, Address::times_ptr,
3658 in_bytes(base +
3659 ConstantPoolCacheEntry::flags_offset())));
3660
3661 // replace index with field offset from cache entry
3662 __ movptr(rbx, Address(rcx, rbx, Address::times_ptr,
3663 in_bytes(base + ConstantPoolCacheEntry::f2_offset())));
3664
3665 // [jk] not needed currently
3666 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadStore |
3667 // Assembler::StoreStore));
3668
3669 Label notVolatile, Done;
3670 if (bytecode() == Bytecodes::_fast_qputfield) {
3671 __ movl(rscratch2, rdx); // saving flags for isFlattened test
3672 }
3673
3674 __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift);
3675 __ andl(rdx, 0x1);
3676
3677 // Get object from stack
3678 pop_and_check_object(rcx);
3679
3680 // field address
3681 const Address field(rcx, rbx, Address::times_1);
3682
3683 // Check for volatile store
3684 __ testl(rdx, rdx);
3685 __ jcc(Assembler::zero, notVolatile);
3686
3687 if (bytecode() == Bytecodes::_fast_qputfield) {
3688 __ movl(rdx, rscratch2); // restoring flags for isFlattened test
3689 }
3690 fast_storefield_helper(field, rax, rdx);
3691 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad |
3692 Assembler::StoreStore));
3693 __ jmp(Done);
3694 __ bind(notVolatile);
3695
3696 if (bytecode() == Bytecodes::_fast_qputfield) {
3697 __ movl(rdx, rscratch2); // restoring flags for isFlattened test
3698 }
3699 fast_storefield_helper(field, rax, rdx);
3700
3701 __ bind(Done);
3702 }
3703
3704 void TemplateTable::fast_storefield_helper(Address field, Register rax, Register flags) {
3705
3706 // access field
3707 switch (bytecode()) {
3708 case Bytecodes::_fast_qputfield:
3709 {
3710 Label isFlattened, done;
3711 __ null_check(rax);
3712 __ test_field_is_flattened(flags, rscratch1, isFlattened);
3713 // No Flattened case
3714 do_oop_store(_masm, field, rax);
3715 __ jmp(done);
3716 __ bind(isFlattened);
3717 // Flattened case
3718 __ load_klass(rdx, rax);
3719 __ data_for_oop(rax, rax, rdx);
3720 __ lea(rcx, field);
3721 __ access_value_copy(IN_HEAP, rax, rcx, rdx);
3722 __ bind(done);
3723 }
3724 break;
3725 case Bytecodes::_fast_aputfield:
3726 {
3727 do_oop_store(_masm, field, rax);
3728 }
3729 break;
3730 case Bytecodes::_fast_lputfield:
3731 #ifdef _LP64
3732 __ access_store_at(T_LONG, IN_HEAP, field, noreg /* ltos */, noreg, noreg);
3733 #else
3734 __ stop("should not be rewritten");
3735 #endif
3736 break;
3737 case Bytecodes::_fast_iputfield:
3738 __ access_store_at(T_INT, IN_HEAP, field, rax, noreg, noreg);
3739 break;
3740 case Bytecodes::_fast_zputfield:
3741 __ access_store_at(T_BOOLEAN, IN_HEAP, field, rax, noreg, noreg);
3742 break;
3743 case Bytecodes::_fast_bputfield:
3744 __ access_store_at(T_BYTE, IN_HEAP, field, rax, noreg, noreg);
3745 break;
3746 case Bytecodes::_fast_sputfield:
3747 __ access_store_at(T_SHORT, IN_HEAP, field, rax, noreg, noreg);
3748 break;
3749 case Bytecodes::_fast_cputfield:
3750 __ access_store_at(T_CHAR, IN_HEAP, field, rax, noreg, noreg);
3751 break;
3752 case Bytecodes::_fast_fputfield:
3753 __ access_store_at(T_FLOAT, IN_HEAP, field, noreg /* ftos*/, noreg, noreg);
3754 break;
3755 case Bytecodes::_fast_dputfield:
3756 __ access_store_at(T_DOUBLE, IN_HEAP, field, noreg /* dtos*/, noreg, noreg);
3757 break;
3758 default:
3759 ShouldNotReachHere();
3760 }
3761 }
3762
3763 void TemplateTable::fast_accessfield(TosState state) {
3764 transition(atos, state);
3765
3766 // Do the JVMTI work here to avoid disturbing the register state below
3767 if (JvmtiExport::can_post_field_access()) {
3768 // Check to see if a field access watch has been set before we
3769 // take the time to call into the VM.
3770 Label L1;
3771 __ mov32(rcx, ExternalAddress((address) JvmtiExport::get_field_access_count_addr()));
3772 __ testl(rcx, rcx);
3773 __ jcc(Assembler::zero, L1);
3774 // access constant pool cache entry
3775 LP64_ONLY(__ get_cache_entry_pointer_at_bcp(c_rarg2, rcx, 1));
3776 NOT_LP64(__ get_cache_entry_pointer_at_bcp(rcx, rdx, 1));
3777 __ verify_oop(rax);
3778 __ push_ptr(rax); // save object pointer before call_VM() clobbers it
3779 LP64_ONLY(__ mov(c_rarg1, rax));
3780 // c_rarg1: object pointer copied above
3781 // c_rarg2: cache entry pointer
3782 LP64_ONLY(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), c_rarg1, c_rarg2));
3783 NOT_LP64(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), rax, rcx));
3784 __ pop_ptr(rax); // restore object pointer
3785 __ bind(L1);
3786 }
3787
3788 // access constant pool cache
3789 __ get_cache_and_index_at_bcp(rcx, rbx, 1);
3790 // replace index with field offset from cache entry
3791 // [jk] not needed currently
3792 // __ movl(rdx, Address(rcx, rbx, Address::times_8,
3793 // in_bytes(ConstantPoolCache::base_offset() +
3794 // ConstantPoolCacheEntry::flags_offset())));
3795 // __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift);
3796 // __ andl(rdx, 0x1);
3797 //
3798 __ movptr(rdx, Address(rcx, rbx, Address::times_ptr,
3799 in_bytes(ConstantPoolCache::base_offset() +
3800 ConstantPoolCacheEntry::f2_offset())));
3801
3802 // rax: object
3803 __ verify_oop(rax);
3804 __ null_check(rax);
3805 Address field(rax, rdx, Address::times_1);
3806
3807 // access field
3808 switch (bytecode()) {
3809 case Bytecodes::_fast_qgetfield:
3810 {
3811 Label isFlattened, nonnull, Done;
3812 __ movptr(rscratch1, Address(rcx, rbx, Address::times_ptr,
3813 in_bytes(ConstantPoolCache::base_offset() +
3814 ConstantPoolCacheEntry::flags_offset())));
3815 __ test_field_is_flattened(rscratch1, rscratch2, isFlattened);
3816 // Non-flattened field case
3817 __ movptr(rscratch1, rax);
3818 __ load_heap_oop(rax, field);
3819 __ testptr(rax, rax);
3820 __ jcc(Assembler::notZero, nonnull);
3821 __ movptr(rax, rscratch1);
3822 __ movl(rcx, Address(rcx, rbx, Address::times_ptr,
3823 in_bytes(ConstantPoolCache::base_offset() +
3824 ConstantPoolCacheEntry::flags_offset())));
3825 __ andl(rcx, ConstantPoolCacheEntry::field_index_mask);
3826 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::uninitialized_instance_value_field),
3827 rax, rcx);
3828 __ bind(nonnull);
3829 __ verify_oop(rax);
3830 __ jmp(Done);
3831 __ bind(isFlattened);
3832 __ push(rdx); // save offset
3833 __ movl(rdx, Address(rcx, rbx, Address::times_ptr,
3834 in_bytes(ConstantPoolCache::base_offset() +
3835 ConstantPoolCacheEntry::flags_offset())));
3836 __ andl(rdx, ConstantPoolCacheEntry::field_index_mask);
3837 __ movptr(rcx, Address(rcx, rbx, Address::times_ptr,
3838 in_bytes(ConstantPoolCache::base_offset() +
3839 ConstantPoolCacheEntry::f1_offset())));
3840 __ pop(rbx); // restore offset
3841 __ read_flattened_field(rcx, rdx, rbx, rax);
3842 __ bind(Done);
3843 __ verify_oop(rax);
3844 }
3845 break;
3846 case Bytecodes::_fast_agetfield:
3847 do_oop_load(_masm, field, rax);
3848 __ verify_oop(rax);
3849 break;
3850 case Bytecodes::_fast_lgetfield:
3851 #ifdef _LP64
3852 __ access_load_at(T_LONG, IN_HEAP, noreg /* ltos */, field, noreg, noreg);
3853 #else
3854 __ stop("should not be rewritten");
3855 #endif
3856 break;
3857 case Bytecodes::_fast_igetfield:
3858 __ access_load_at(T_INT, IN_HEAP, rax, field, noreg, noreg);
3859 break;
3860 case Bytecodes::_fast_bgetfield:
3861 __ access_load_at(T_BYTE, IN_HEAP, rax, field, noreg, noreg);
3862 break;
3863 case Bytecodes::_fast_sgetfield:
3864 __ access_load_at(T_SHORT, IN_HEAP, rax, field, noreg, noreg);
3865 break;
3866 case Bytecodes::_fast_cgetfield:
3867 __ access_load_at(T_CHAR, IN_HEAP, rax, field, noreg, noreg);
3868 break;
3869 case Bytecodes::_fast_fgetfield:
3870 __ access_load_at(T_FLOAT, IN_HEAP, noreg /* ftos */, field, noreg, noreg);
3871 break;
3872 case Bytecodes::_fast_dgetfield:
3873 __ access_load_at(T_DOUBLE, IN_HEAP, noreg /* dtos */, field, noreg, noreg);
3874 break;
3875 default:
3876 ShouldNotReachHere();
3877 }
3878 // [jk] not needed currently
3879 // Label notVolatile;
3880 // __ testl(rdx, rdx);
3881 // __ jcc(Assembler::zero, notVolatile);
3882 // __ membar(Assembler::LoadLoad);
3883 // __ bind(notVolatile);
3884 }
3885
3886 void TemplateTable::fast_xaccess(TosState state) {
3887 transition(vtos, state);
3888
3889 // get receiver
3890 __ movptr(rax, aaddress(0));
3891 // access constant pool cache
3892 __ get_cache_and_index_at_bcp(rcx, rdx, 2);
3893 __ movptr(rbx,
3894 Address(rcx, rdx, Address::times_ptr,
3895 in_bytes(ConstantPoolCache::base_offset() +
3896 ConstantPoolCacheEntry::f2_offset())));
3897 // make sure exception is reported in correct bcp range (getfield is
3898 // next instruction)
3899 __ increment(rbcp);
3900 __ null_check(rax);
3901 const Address field = Address(rax, rbx, Address::times_1, 0*wordSize);
3902 switch (state) {
3903 case itos:
3904 __ access_load_at(T_INT, IN_HEAP, rax, field, noreg, noreg);
3905 break;
3906 case atos:
3907 do_oop_load(_masm, field, rax);
3908 __ verify_oop(rax);
3909 break;
3910 case ftos:
3911 __ access_load_at(T_FLOAT, IN_HEAP, noreg /* ftos */, field, noreg, noreg);
3912 break;
3913 default:
3914 ShouldNotReachHere();
3915 }
3916
3917 // [jk] not needed currently
3918 // Label notVolatile;
3919 // __ movl(rdx, Address(rcx, rdx, Address::times_8,
3920 // in_bytes(ConstantPoolCache::base_offset() +
3921 // ConstantPoolCacheEntry::flags_offset())));
3922 // __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift);
3923 // __ testl(rdx, 0x1);
3924 // __ jcc(Assembler::zero, notVolatile);
3925 // __ membar(Assembler::LoadLoad);
3926 // __ bind(notVolatile);
3927
3928 __ decrement(rbcp);
3929 }
3930
3931 //-----------------------------------------------------------------------------
3932 // Calls
3933
3934 void TemplateTable::count_calls(Register method, Register temp) {
3935 // implemented elsewhere
3936 ShouldNotReachHere();
3937 }
3938
3939 void TemplateTable::prepare_invoke(int byte_no,
3940 Register method, // linked method (or i-klass)
3941 Register index, // itable index, MethodType, etc.
3942 Register recv, // if caller wants to see it
3943 Register flags // if caller wants to test it
3944 ) {
3945 // determine flags
3946 const Bytecodes::Code code = bytecode();
3947 const bool is_invokeinterface = code == Bytecodes::_invokeinterface;
3948 const bool is_invokedynamic = code == Bytecodes::_invokedynamic;
3949 const bool is_invokehandle = code == Bytecodes::_invokehandle;
3950 const bool is_invokevirtual = code == Bytecodes::_invokevirtual;
3951 const bool is_invokespecial = code == Bytecodes::_invokespecial;
3952 const bool load_receiver = (recv != noreg);
3953 const bool save_flags = (flags != noreg);
3954 assert(load_receiver == (code != Bytecodes::_invokestatic && code != Bytecodes::_invokedynamic), "");
3955 assert(save_flags == (is_invokeinterface || is_invokevirtual), "need flags for vfinal");
3956 assert(flags == noreg || flags == rdx, "");
3957 assert(recv == noreg || recv == rcx, "");
3958
3959 // setup registers & access constant pool cache
3960 if (recv == noreg) recv = rcx;
3961 if (flags == noreg) flags = rdx;
3962 assert_different_registers(method, index, recv, flags);
3963
3964 // save 'interpreter return address'
3965 __ save_bcp();
3966
3967 load_invoke_cp_cache_entry(byte_no, method, index, flags, is_invokevirtual, false, is_invokedynamic);
3968
3969 // maybe push appendix to arguments (just before return address)
3970 if (is_invokedynamic || is_invokehandle) {
3971 Label L_no_push;
3972 __ testl(flags, (1 << ConstantPoolCacheEntry::has_appendix_shift));
3973 __ jcc(Assembler::zero, L_no_push);
3974 // Push the appendix as a trailing parameter.
3975 // This must be done before we get the receiver,
3976 // since the parameter_size includes it.
3977 __ push(rbx);
3978 __ mov(rbx, index);
3979 __ load_resolved_reference_at_index(index, rbx);
3980 __ pop(rbx);
3981 __ push(index); // push appendix (MethodType, CallSite, etc.)
3982 __ bind(L_no_push);
3983 }
3984
3985 // load receiver if needed (after appendix is pushed so parameter size is correct)
3986 // Note: no return address pushed yet
3987 if (load_receiver) {
3988 __ movl(recv, flags);
3989 __ andl(recv, ConstantPoolCacheEntry::parameter_size_mask);
3990 const int no_return_pc_pushed_yet = -1; // argument slot correction before we push return address
3991 const int receiver_is_at_end = -1; // back off one slot to get receiver
3992 Address recv_addr = __ argument_address(recv, no_return_pc_pushed_yet + receiver_is_at_end);
3993 __ movptr(recv, recv_addr);
3994 __ verify_oop(recv);
3995 }
3996
3997 if (save_flags) {
3998 __ movl(rbcp, flags);
3999 }
4000
4001 // compute return type
4002 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift);
4003 // Make sure we don't need to mask flags after the above shift
4004 ConstantPoolCacheEntry::verify_tos_state_shift();
4005 // load return address
4006 {
4007 const address table_addr = (address) Interpreter::invoke_return_entry_table_for(code);
4008 ExternalAddress table(table_addr);
4009 LP64_ONLY(__ lea(rscratch1, table));
4010 LP64_ONLY(__ movptr(flags, Address(rscratch1, flags, Address::times_ptr)));
4011 NOT_LP64(__ movptr(flags, ArrayAddress(table, Address(noreg, flags, Address::times_ptr))));
4012 }
4013
4014 // push return address
4015 __ push(flags);
4016
4017 // Restore flags value from the constant pool cache, and restore rsi
4018 // for later null checks. r13 is the bytecode pointer
4019 if (save_flags) {
4020 __ movl(flags, rbcp);
4021 __ restore_bcp();
4022 }
4023 }
4024
4025 void TemplateTable::invokevirtual_helper(Register index,
4026 Register recv,
4027 Register flags) {
4028 // Uses temporary registers rax, rdx
4029 assert_different_registers(index, recv, rax, rdx);
4030 assert(index == rbx, "");
4031 assert(recv == rcx, "");
4032
4033 // Test for an invoke of a final method
4034 Label notFinal;
4035 __ movl(rax, flags);
4036 __ andl(rax, (1 << ConstantPoolCacheEntry::is_vfinal_shift));
4037 __ jcc(Assembler::zero, notFinal);
4038
4039 const Register method = index; // method must be rbx
4040 assert(method == rbx,
4041 "Method* must be rbx for interpreter calling convention");
4042
4043 // do the call - the index is actually the method to call
4044 // that is, f2 is a vtable index if !is_vfinal, else f2 is a Method*
4045
4046 // It's final, need a null check here!
4047 __ null_check(recv);
4048
4049 // profile this call
4050 __ profile_final_call(rax);
4051 __ profile_arguments_type(rax, method, rbcp, true);
4052
4053 __ jump_from_interpreted(method, rax);
4054
4055 __ bind(notFinal);
4056
4057 // get receiver klass
4058 __ null_check(recv, oopDesc::klass_offset_in_bytes());
4059 __ load_klass(rax, recv);
4060
4061 // profile this call
4062 __ profile_virtual_call(rax, rlocals, rdx);
4063 // get target Method* & entry point
4064 __ lookup_virtual_method(rax, index, method);
4065 __ profile_called_method(method, rdx, rbcp);
4066
4067 __ profile_arguments_type(rdx, method, rbcp, true);
4068 __ jump_from_interpreted(method, rdx);
4069 }
4070
4071 void TemplateTable::invokevirtual(int byte_no) {
4072 transition(vtos, vtos);
4073 assert(byte_no == f2_byte, "use this argument");
4074 prepare_invoke(byte_no,
4075 rbx, // method or vtable index
4076 noreg, // unused itable index
4077 rcx, rdx); // recv, flags
4078
4079 // rbx: index
4080 // rcx: receiver
4081 // rdx: flags
4082
4083 invokevirtual_helper(rbx, rcx, rdx);
4084 }
4085
4086 void TemplateTable::invokespecial(int byte_no) {
4087 transition(vtos, vtos);
4088 assert(byte_no == f1_byte, "use this argument");
4089 prepare_invoke(byte_no, rbx, noreg, // get f1 Method*
4090 rcx); // get receiver also for null check
4091 __ verify_oop(rcx);
4092 __ null_check(rcx);
4093 // do the call
4094 __ profile_call(rax);
4095 __ profile_arguments_type(rax, rbx, rbcp, false);
4096 __ jump_from_interpreted(rbx, rax);
4097 }
4098
4099 void TemplateTable::invokestatic(int byte_no) {
4100 transition(vtos, vtos);
4101 assert(byte_no == f1_byte, "use this argument");
4102 prepare_invoke(byte_no, rbx); // get f1 Method*
4103 // do the call
4104 __ profile_call(rax);
4105 __ profile_arguments_type(rax, rbx, rbcp, false);
4106 __ jump_from_interpreted(rbx, rax);
4107 }
4108
4109
4110 void TemplateTable::fast_invokevfinal(int byte_no) {
4111 transition(vtos, vtos);
4112 assert(byte_no == f2_byte, "use this argument");
4113 __ stop("fast_invokevfinal not used on x86");
4114 }
4115
4116
4117 void TemplateTable::invokeinterface(int byte_no) {
4118 transition(vtos, vtos);
4119 assert(byte_no == f1_byte, "use this argument");
4120 prepare_invoke(byte_no, rax, rbx, // get f1 Klass*, f2 Method*
4121 rcx, rdx); // recv, flags
4122
4123 // rax: reference klass (from f1) if interface method
4124 // rbx: method (from f2)
4125 // rcx: receiver
4126 // rdx: flags
4127
4128 // First check for Object case, then private interface method,
4129 // then regular interface method.
4130
4131 // Special case of invokeinterface called for virtual method of
4132 // java.lang.Object. See cpCache.cpp for details.
4133 Label notObjectMethod;
4134 __ movl(rlocals, rdx);
4135 __ andl(rlocals, (1 << ConstantPoolCacheEntry::is_forced_virtual_shift));
4136 __ jcc(Assembler::zero, notObjectMethod);
4137 invokevirtual_helper(rbx, rcx, rdx);
4138 // no return from above
4139 __ bind(notObjectMethod);
4140
4141 Label no_such_interface; // for receiver subtype check
4142 Register recvKlass; // used for exception processing
4143
4144 // Check for private method invocation - indicated by vfinal
4145 Label notVFinal;
4146 __ movl(rlocals, rdx);
4147 __ andl(rlocals, (1 << ConstantPoolCacheEntry::is_vfinal_shift));
4148 __ jcc(Assembler::zero, notVFinal);
4149
4150 // Get receiver klass into rlocals - also a null check
4151 __ null_check(rcx, oopDesc::klass_offset_in_bytes());
4152 __ load_klass(rlocals, rcx);
4153
4154 Label subtype;
4155 __ check_klass_subtype(rlocals, rax, rbcp, subtype);
4156 // If we get here the typecheck failed
4157 recvKlass = rdx;
4158 __ mov(recvKlass, rlocals); // shuffle receiver class for exception use
4159 __ jmp(no_such_interface);
4160
4161 __ bind(subtype);
4162
4163 // do the call - rbx is actually the method to call
4164
4165 __ profile_final_call(rdx);
4166 __ profile_arguments_type(rdx, rbx, rbcp, true);
4167
4168 __ jump_from_interpreted(rbx, rdx);
4169 // no return from above
4170 __ bind(notVFinal);
4171
4172 // Get receiver klass into rdx - also a null check
4173 __ restore_locals(); // restore r14
4174 __ null_check(rcx, oopDesc::klass_offset_in_bytes());
4175 __ load_klass(rdx, rcx);
4176
4177 Label no_such_method;
4178
4179 // Preserve method for throw_AbstractMethodErrorVerbose.
4180 __ mov(rcx, rbx);
4181 // Receiver subtype check against REFC.
4182 // Superklass in rax. Subklass in rdx. Blows rcx, rdi.
4183 __ lookup_interface_method(// inputs: rec. class, interface, itable index
4184 rdx, rax, noreg,
4185 // outputs: scan temp. reg, scan temp. reg
4186 rbcp, rlocals,
4187 no_such_interface,
4188 /*return_method=*/false);
4189
4190 // profile this call
4191 __ restore_bcp(); // rbcp was destroyed by receiver type check
4192 __ profile_virtual_call(rdx, rbcp, rlocals);
4193
4194 // Get declaring interface class from method, and itable index
4195 __ load_method_holder(rax, rbx);
4196 __ movl(rbx, Address(rbx, Method::itable_index_offset()));
4197 __ subl(rbx, Method::itable_index_max);
4198 __ negl(rbx);
4199
4200 // Preserve recvKlass for throw_AbstractMethodErrorVerbose.
4201 __ mov(rlocals, rdx);
4202 __ lookup_interface_method(// inputs: rec. class, interface, itable index
4203 rlocals, rax, rbx,
4204 // outputs: method, scan temp. reg
4205 rbx, rbcp,
4206 no_such_interface);
4207
4208 // rbx: Method* to call
4209 // rcx: receiver
4210 // Check for abstract method error
4211 // Note: This should be done more efficiently via a throw_abstract_method_error
4212 // interpreter entry point and a conditional jump to it in case of a null
4213 // method.
4214 __ testptr(rbx, rbx);
4215 __ jcc(Assembler::zero, no_such_method);
4216
4217 __ profile_called_method(rbx, rbcp, rdx);
4218 __ profile_arguments_type(rdx, rbx, rbcp, true);
4219
4220 // do the call
4221 // rcx: receiver
4222 // rbx,: Method*
4223 __ jump_from_interpreted(rbx, rdx);
4224 __ should_not_reach_here();
4225
4226 // exception handling code follows...
4227 // note: must restore interpreter registers to canonical
4228 // state for exception handling to work correctly!
4229
4230 __ bind(no_such_method);
4231 // throw exception
4232 __ pop(rbx); // pop return address (pushed by prepare_invoke)
4233 __ restore_bcp(); // rbcp must be correct for exception handler (was destroyed)
4234 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
4235 // Pass arguments for generating a verbose error message.
4236 #ifdef _LP64
4237 recvKlass = c_rarg1;
4238 Register method = c_rarg2;
4239 if (recvKlass != rdx) { __ movq(recvKlass, rdx); }
4240 if (method != rcx) { __ movq(method, rcx); }
4241 #else
4242 recvKlass = rdx;
4243 Register method = rcx;
4244 #endif
4245 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodErrorVerbose),
4246 recvKlass, method);
4247 // The call_VM checks for exception, so we should never return here.
4248 __ should_not_reach_here();
4249
4250 __ bind(no_such_interface);
4251 // throw exception
4252 __ pop(rbx); // pop return address (pushed by prepare_invoke)
4253 __ restore_bcp(); // rbcp must be correct for exception handler (was destroyed)
4254 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
4255 // Pass arguments for generating a verbose error message.
4256 LP64_ONLY( if (recvKlass != rdx) { __ movq(recvKlass, rdx); } )
4257 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose),
4258 recvKlass, rax);
4259 // the call_VM checks for exception, so we should never return here.
4260 __ should_not_reach_here();
4261 }
4262
4263 void TemplateTable::invokehandle(int byte_no) {
4264 transition(vtos, vtos);
4265 assert(byte_no == f1_byte, "use this argument");
4266 const Register rbx_method = rbx;
4267 const Register rax_mtype = rax;
4268 const Register rcx_recv = rcx;
4269 const Register rdx_flags = rdx;
4270
4271 prepare_invoke(byte_no, rbx_method, rax_mtype, rcx_recv);
4272 __ verify_method_ptr(rbx_method);
4273 __ verify_oop(rcx_recv);
4274 __ null_check(rcx_recv);
4275
4276 // rax: MethodType object (from cpool->resolved_references[f1], if necessary)
4277 // rbx: MH.invokeExact_MT method (from f2)
4278
4279 // Note: rax_mtype is already pushed (if necessary) by prepare_invoke
4280
4281 // FIXME: profile the LambdaForm also
4282 __ profile_final_call(rax);
4283 __ profile_arguments_type(rdx, rbx_method, rbcp, true);
4284
4285 __ jump_from_interpreted(rbx_method, rdx);
4286 }
4287
4288 void TemplateTable::invokedynamic(int byte_no) {
4289 transition(vtos, vtos);
4290 assert(byte_no == f1_byte, "use this argument");
4291
4292 const Register rbx_method = rbx;
4293 const Register rax_callsite = rax;
4294
4295 prepare_invoke(byte_no, rbx_method, rax_callsite);
4296
4297 // rax: CallSite object (from cpool->resolved_references[f1])
4298 // rbx: MH.linkToCallSite method (from f2)
4299
4300 // Note: rax_callsite is already pushed by prepare_invoke
4301
4302 // %%% should make a type profile for any invokedynamic that takes a ref argument
4303 // profile this call
4304 __ profile_call(rbcp);
4305 __ profile_arguments_type(rdx, rbx_method, rbcp, false);
4306
4307 __ verify_oop(rax_callsite);
4308
4309 __ jump_from_interpreted(rbx_method, rdx);
4310 }
4311
4312 //-----------------------------------------------------------------------------
4313 // Allocation
4314
4315 void TemplateTable::_new() {
4316 transition(vtos, atos);
4317 __ get_unsigned_2_byte_index_at_bcp(rdx, 1);
4318 Label slow_case;
4319 Label done;
4320
4321 __ get_cpool_and_tags(rcx, rax);
4322
4323 // Make sure the class we're about to instantiate has been resolved.
4324 // This is done before loading InstanceKlass to be consistent with the order
4325 // how Constant Pool is updated (see ConstantPool::klass_at_put)
4326 const int tags_offset = Array<u1>::base_offset_in_bytes();
4327 __ cmpb(Address(rax, rdx, Address::times_1, tags_offset), JVM_CONSTANT_Class);
4328 __ jcc(Assembler::notEqual, slow_case);
4329
4330 // get InstanceKlass
4331 __ load_resolved_klass_at_index(rcx, rcx, rdx);
4332
4333 // make sure klass is initialized & doesn't have finalizer
4334 __ cmpb(Address(rcx, InstanceKlass::init_state_offset()), InstanceKlass::fully_initialized);
4335 __ jcc(Assembler::notEqual, slow_case);
4336
4337 __ allocate_instance(rcx, rax, rdx, rbx, true, slow_case);
4338 __ jmp(done);
4339
4340 // slow case
4341 __ bind(slow_case);
4342
4343 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rax);
4344 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
4345
4346 __ get_constant_pool(rarg1);
4347 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1);
4348 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::_new), rarg1, rarg2);
4349 __ verify_oop(rax);
4350
4351 // continue
4352 __ bind(done);
4353 }
4354
4355 void TemplateTable::defaultvalue() {
4356 transition(vtos, atos);
4357
4358 Label slow_case;
4359 Label done;
4360
4361 __ get_unsigned_2_byte_index_at_bcp(rdx, 1);
4362 __ get_cpool_and_tags(rcx, rax);
4363
4364 // Make sure the class we're about to instantiate has been resolved.
4365 // This is done before loading InstanceKlass to be consistent with the order
4366 // how Constant Pool is updated (see ConstantPool::klass_at_put)
4367 const int tags_offset = Array<u1>::base_offset_in_bytes();
4368 __ cmpb(Address(rax, rdx, Address::times_1, tags_offset), JVM_CONSTANT_Class);
4369 __ jcc(Assembler::notEqual, slow_case);
4370
4371 // get InstanceKlass
4372 __ load_resolved_klass_at_index(rcx, rcx, rdx);
4373
4374 // make sure klass is fully initialized
4375 __ cmpb(Address(rcx, InstanceKlass::init_state_offset()), InstanceKlass::fully_initialized);
4376 __ jcc(Assembler::notEqual, slow_case);
4377
4378 // have a resolved ValueKlass in rcx, return the default value oop from it
4379 __ get_default_value_oop(rcx, rdx, rax);
4380 __ jmp(done);
4381
4382 __ bind(slow_case);
4383
4384 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
4385 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
4386
4387 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1);
4388 __ get_constant_pool(rarg1);
4389
4390 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::defaultvalue),
4391 rarg1, rarg2);
4392
4393 __ bind(done);
4394 __ verify_oop(rax);
4395 }
4396
4397 void TemplateTable::newarray() {
4398 transition(itos, atos);
4399 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
4400 __ load_unsigned_byte(rarg1, at_bcp(1));
4401 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::newarray),
4402 rarg1, rax);
4403 }
4404
4405 void TemplateTable::anewarray() {
4406 transition(itos, atos);
4407
4408 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
4409 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
4410
4411 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1);
4412 __ get_constant_pool(rarg1);
4413 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::anewarray),
4414 rarg1, rarg2, rax);
4415 }
4416
4417 void TemplateTable::arraylength() {
4418 transition(atos, itos);
4419 __ null_check(rax, arrayOopDesc::length_offset_in_bytes());
4420 __ movl(rax, Address(rax, arrayOopDesc::length_offset_in_bytes()));
4421 }
4422
4423 void TemplateTable::checkcast() {
4424 transition(atos, atos);
4425 Label done, is_null, ok_is_subtype, quicked, resolved;
4426 __ testptr(rax, rax); // object is in rax
4427 __ jcc(Assembler::zero, is_null);
4428
4429 // Get cpool & tags index
4430 __ get_cpool_and_tags(rcx, rdx); // rcx=cpool, rdx=tags array
4431 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // rbx=index
4432 // See if bytecode has already been quicked
4433 __ movzbl(rdx, Address(rdx, rbx,
4434 Address::times_1,
4435 Array<u1>::base_offset_in_bytes()));
4436 __ andl (rdx, ~JVM_CONSTANT_QDescBit);
4437 __ cmpl(rdx, JVM_CONSTANT_Class);
4438 __ jcc(Assembler::equal, quicked);
4439 __ push(atos); // save receiver for result, and for GC
4440 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc));
4441
4442 // vm_result_2 has metadata result
4443 #ifndef _LP64
4444 // borrow rdi from locals
4445 __ get_thread(rdi);
4446 __ get_vm_result_2(rax, rdi);
4447 __ restore_locals();
4448 #else
4449 __ get_vm_result_2(rax, r15_thread);
4450 #endif
4451
4452 __ pop_ptr(rdx); // restore receiver
4453 __ jmpb(resolved);
4454
4455 // Get superklass in rax and subklass in rbx
4456 __ bind(quicked);
4457 __ mov(rdx, rax); // Save object in rdx; rax needed for subtype check
4458 __ load_resolved_klass_at_index(rax, rcx, rbx);
4459
4460 __ bind(resolved);
4461 __ load_klass(rbx, rdx);
4462
4463 // Generate subtype check. Blows rcx, rdi. Object in rdx.
4464 // Superklass in rax. Subklass in rbx.
4465 __ gen_subtype_check(rbx, ok_is_subtype);
4466
4467 // Come here on failure
4468 __ push_ptr(rdx);
4469 // object is at TOS
4470 __ jump(ExternalAddress(Interpreter::_throw_ClassCastException_entry));
4471
4472 // Come here on success
4473 __ bind(ok_is_subtype);
4474 __ mov(rax, rdx); // Restore object in rdx
4475 __ jmp(done);
4476
4477 __ bind(is_null);
4478
4479 // Collect counts on whether this check-cast sees NULLs a lot or not.
4480 if (ProfileInterpreter) {
4481 __ profile_null_seen(rcx);
4482 }
4483
4484 if (EnableValhalla) {
4485 // Get cpool & tags index
4486 __ get_cpool_and_tags(rcx, rdx); // rcx=cpool, rdx=tags array
4487 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // rbx=index
4488 // See if CP entry is a Q-descriptor
4489 __ movzbl(rcx, Address(rdx, rbx,
4490 Address::times_1,
4491 Array<u1>::base_offset_in_bytes()));
4492 __ andl (rcx, JVM_CONSTANT_QDescBit);
4493 __ cmpl(rcx, JVM_CONSTANT_QDescBit);
4494 __ jcc(Assembler::notEqual, done);
4495 __ jump(ExternalAddress(Interpreter::_throw_NullPointerException_entry));
4496 }
4497
4498 __ bind(done);
4499 }
4500
4501 void TemplateTable::instanceof() {
4502 transition(atos, itos);
4503 Label done, is_null, ok_is_subtype, quicked, resolved;
4504 __ testptr(rax, rax);
4505 __ jcc(Assembler::zero, is_null);
4506
4507 // Get cpool & tags index
4508 __ get_cpool_and_tags(rcx, rdx); // rcx=cpool, rdx=tags array
4509 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // rbx=index
4510 // See if bytecode has already been quicked
4511 __ movzbl(rdx, Address(rdx, rbx,
4512 Address::times_1,
4513 Array<u1>::base_offset_in_bytes()));
4514 __ andl (rdx, ~JVM_CONSTANT_QDescBit);
4515 __ cmpl(rdx, JVM_CONSTANT_Class);
4516 __ jcc(Assembler::equal, quicked);
4517
4518 __ push(atos); // save receiver for result, and for GC
4519 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc));
4520 // vm_result_2 has metadata result
4521
4522 #ifndef _LP64
4523 // borrow rdi from locals
4524 __ get_thread(rdi);
4525 __ get_vm_result_2(rax, rdi);
4526 __ restore_locals();
4527 #else
4528 __ get_vm_result_2(rax, r15_thread);
4529 #endif
4530
4531 __ pop_ptr(rdx); // restore receiver
4532 __ verify_oop(rdx);
4533 __ load_klass(rdx, rdx);
4534 __ jmpb(resolved);
4535
4536 // Get superklass in rax and subklass in rdx
4537 __ bind(quicked);
4538 __ load_klass(rdx, rax);
4539 __ load_resolved_klass_at_index(rax, rcx, rbx);
4540
4541 __ bind(resolved);
4542
4543 // Generate subtype check. Blows rcx, rdi
4544 // Superklass in rax. Subklass in rdx.
4545 __ gen_subtype_check(rdx, ok_is_subtype);
4546
4547 // Come here on failure
4548 __ xorl(rax, rax);
4549 __ jmpb(done);
4550 // Come here on success
4551 __ bind(ok_is_subtype);
4552 __ movl(rax, 1);
4553
4554 // Collect counts on whether this test sees NULLs a lot or not.
4555 if (ProfileInterpreter) {
4556 __ jmp(done);
4557 __ bind(is_null);
4558 __ profile_null_seen(rcx);
4559 } else {
4560 __ bind(is_null); // same as 'done'
4561 }
4562 __ bind(done);
4563 // rax = 0: obj == NULL or obj is not an instanceof the specified klass
4564 // rax = 1: obj != NULL and obj is an instanceof the specified klass
4565 }
4566
4567 //----------------------------------------------------------------------------------------------------
4568 // Breakpoints
4569 void TemplateTable::_breakpoint() {
4570 // Note: We get here even if we are single stepping..
4571 // jbug insists on setting breakpoints at every bytecode
4572 // even if we are in single step mode.
4573
4574 transition(vtos, vtos);
4575
4576 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
4577
4578 // get the unpatched byte code
4579 __ get_method(rarg);
4580 __ call_VM(noreg,
4581 CAST_FROM_FN_PTR(address,
4582 InterpreterRuntime::get_original_bytecode_at),
4583 rarg, rbcp);
4584 __ mov(rbx, rax); // why?
4585
4586 // post the breakpoint event
4587 __ get_method(rarg);
4588 __ call_VM(noreg,
4589 CAST_FROM_FN_PTR(address, InterpreterRuntime::_breakpoint),
4590 rarg, rbcp);
4591
4592 // complete the execution of original bytecode
4593 __ dispatch_only_normal(vtos);
4594 }
4595
4596 //-----------------------------------------------------------------------------
4597 // Exceptions
4598
4599 void TemplateTable::athrow() {
4600 transition(atos, vtos);
4601 __ null_check(rax);
4602 __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
4603 }
4604
4605 //-----------------------------------------------------------------------------
4606 // Synchronization
4607 //
4608 // Note: monitorenter & exit are symmetric routines; which is reflected
4609 // in the assembly code structure as well
4610 //
4611 // Stack layout:
4612 //
4613 // [expressions ] <--- rsp = expression stack top
4614 // ..
4615 // [expressions ]
4616 // [monitor entry] <--- monitor block top = expression stack bot
4617 // ..
4618 // [monitor entry]
4619 // [frame data ] <--- monitor block bot
4620 // ...
4621 // [saved rbp ] <--- rbp
4622 void TemplateTable::monitorenter() {
4623 transition(atos, vtos);
4624
4625 // check for NULL object
4626 __ null_check(rax);
4627
4628 __ resolve(IS_NOT_NULL, rax);
4629
4630 const int is_value_mask = markWord::always_locked_pattern;
4631 Label has_identity;
4632 __ movptr(rbx, Address(rax, oopDesc::mark_offset_in_bytes()));
4633 __ andptr(rbx, is_value_mask);
4634 __ cmpl(rbx, is_value_mask);
4635 __ jcc(Assembler::notEqual, has_identity);
4636 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
4637 InterpreterRuntime::throw_illegal_monitor_state_exception));
4638 __ should_not_reach_here();
4639 __ bind(has_identity);
4640
4641 const Address monitor_block_top(
4642 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
4643 const Address monitor_block_bot(
4644 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
4645 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
4646
4647 Label allocated;
4648
4649 Register rtop = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
4650 Register rbot = LP64_ONLY(c_rarg2) NOT_LP64(rbx);
4651 Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
4652
4653 // initialize entry pointer
4654 __ xorl(rmon, rmon); // points to free slot or NULL
4655
4656 // find a free slot in the monitor block (result in rmon)
4657 {
4658 Label entry, loop, exit;
4659 __ movptr(rtop, monitor_block_top); // points to current entry,
4660 // starting with top-most entry
4661 __ lea(rbot, monitor_block_bot); // points to word before bottom
4662 // of monitor block
4663 __ jmpb(entry);
4664
4665 __ bind(loop);
4666 // check if current entry is used
4667 __ cmpptr(Address(rtop, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL_WORD);
4668 // if not used then remember entry in rmon
4669 __ cmovptr(Assembler::equal, rmon, rtop); // cmov => cmovptr
4670 // check if current entry is for same object
4671 __ cmpptr(rax, Address(rtop, BasicObjectLock::obj_offset_in_bytes()));
4672 // if same object then stop searching
4673 __ jccb(Assembler::equal, exit);
4674 // otherwise advance to next entry
4675 __ addptr(rtop, entry_size);
4676 __ bind(entry);
4677 // check if bottom reached
4678 __ cmpptr(rtop, rbot);
4679 // if not at bottom then check this entry
4680 __ jcc(Assembler::notEqual, loop);
4681 __ bind(exit);
4682 }
4683
4684 __ testptr(rmon, rmon); // check if a slot has been found
4685 __ jcc(Assembler::notZero, allocated); // if found, continue with that one
4686
4687 // allocate one if there's no free slot
4688 {
4689 Label entry, loop;
4690 // 1. compute new pointers // rsp: old expression stack top
4691 __ movptr(rmon, monitor_block_bot); // rmon: old expression stack bottom
4692 __ subptr(rsp, entry_size); // move expression stack top
4693 __ subptr(rmon, entry_size); // move expression stack bottom
4694 __ mov(rtop, rsp); // set start value for copy loop
4695 __ movptr(monitor_block_bot, rmon); // set new monitor block bottom
4696 __ jmp(entry);
4697 // 2. move expression stack contents
4698 __ bind(loop);
4699 __ movptr(rbot, Address(rtop, entry_size)); // load expression stack
4700 // word from old location
4701 __ movptr(Address(rtop, 0), rbot); // and store it at new location
4702 __ addptr(rtop, wordSize); // advance to next word
4703 __ bind(entry);
4704 __ cmpptr(rtop, rmon); // check if bottom reached
4705 __ jcc(Assembler::notEqual, loop); // if not at bottom then
4706 // copy next word
4707 }
4708
4709 // call run-time routine
4710 // rmon: points to monitor entry
4711 __ bind(allocated);
4712
4713 // Increment bcp to point to the next bytecode, so exception
4714 // handling for async. exceptions work correctly.
4715 // The object has already been poped from the stack, so the
4716 // expression stack looks correct.
4717 __ increment(rbcp);
4718
4719 // store object
4720 __ movptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), rax);
4721 __ lock_object(rmon);
4722
4723 // check to make sure this monitor doesn't cause stack overflow after locking
4724 __ save_bcp(); // in case of exception
4725 __ generate_stack_overflow_check(0);
4726
4727 // The bcp has already been incremented. Just need to dispatch to
4728 // next instruction.
4729 __ dispatch_next(vtos);
4730 }
4731
4732 void TemplateTable::monitorexit() {
4733 transition(atos, vtos);
4734
4735 // check for NULL object
4736 __ null_check(rax);
4737
4738 __ resolve(IS_NOT_NULL, rax);
4739
4740 const int is_value_mask = markWord::always_locked_pattern;
4741 Label has_identity;
4742 __ movptr(rbx, Address(rax, oopDesc::mark_offset_in_bytes()));
4743 __ andptr(rbx, is_value_mask);
4744 __ cmpl(rbx, is_value_mask);
4745 __ jcc(Assembler::notEqual, has_identity);
4746 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
4747 InterpreterRuntime::throw_illegal_monitor_state_exception));
4748 __ should_not_reach_here();
4749 __ bind(has_identity);
4750
4751 const Address monitor_block_top(
4752 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
4753 const Address monitor_block_bot(
4754 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
4755 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
4756
4757 Register rtop = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
4758 Register rbot = LP64_ONLY(c_rarg2) NOT_LP64(rbx);
4759
4760 Label found;
4761
4762 // find matching slot
4763 {
4764 Label entry, loop;
4765 __ movptr(rtop, monitor_block_top); // points to current entry,
4766 // starting with top-most entry
4767 __ lea(rbot, monitor_block_bot); // points to word before bottom
4768 // of monitor block
4769 __ jmpb(entry);
4770
4771 __ bind(loop);
4772 // check if current entry is for same object
4773 __ cmpptr(rax, Address(rtop, BasicObjectLock::obj_offset_in_bytes()));
4774 // if same object then stop searching
4775 __ jcc(Assembler::equal, found);
4776 // otherwise advance to next entry
4777 __ addptr(rtop, entry_size);
4778 __ bind(entry);
4779 // check if bottom reached
4780 __ cmpptr(rtop, rbot);
4781 // if not at bottom then check this entry
4782 __ jcc(Assembler::notEqual, loop);
4783 }
4784
4785 // error handling. Unlocking was not block-structured
4786 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
4787 InterpreterRuntime::throw_illegal_monitor_state_exception));
4788 __ should_not_reach_here();
4789
4790 // call run-time routine
4791 __ bind(found);
4792 __ push_ptr(rax); // make sure object is on stack (contract with oopMaps)
4793 __ unlock_object(rtop);
4794 __ pop_ptr(rax); // discard object
4795 }
4796
4797 // Wide instructions
4798 void TemplateTable::wide() {
4799 transition(vtos, vtos);
4800 __ load_unsigned_byte(rbx, at_bcp(1));
4801 ExternalAddress wtable((address)Interpreter::_wentry_point);
4802 __ jump(ArrayAddress(wtable, Address(noreg, rbx, Address::times_ptr)));
4803 // Note: the rbcp increment step is part of the individual wide bytecode implementations
4804 }
4805
4806 // Multi arrays
4807 void TemplateTable::multianewarray() {
4808 transition(vtos, atos);
4809
4810 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rax);
4811 __ load_unsigned_byte(rax, at_bcp(3)); // get number of dimensions
4812 // last dim is on top of stack; we want address of first one:
4813 // first_addr = last_addr + (ndims - 1) * stackElementSize - 1*wordsize
4814 // the latter wordSize to point to the beginning of the array.
4815 __ lea(rarg, Address(rsp, rax, Interpreter::stackElementScale(), -wordSize));
4816 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::multianewarray), rarg);
4817 __ load_unsigned_byte(rbx, at_bcp(3));
4818 __ lea(rsp, Address(rsp, rbx, Interpreter::stackElementScale())); // get rid of counts
4819 }