1 /*
2 * Copyright (c) 1997, 2022, 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 "gc/shared/collectedHeap.hpp"
29 #include "gc/shared/tlab_globals.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "interpreter/interpreterRuntime.hpp"
32 #include "interpreter/interp_masm.hpp"
33 #include "interpreter/templateTable.hpp"
34 #include "memory/universe.hpp"
35 #include "oops/methodData.hpp"
36 #include "oops/objArrayKlass.hpp"
37 #include "oops/oop.inline.hpp"
38 #include "prims/jvmtiExport.hpp"
39 #include "prims/methodHandles.hpp"
40 #include "runtime/frame.inline.hpp"
41 #include "runtime/safepointMechanism.hpp"
42 #include "runtime/sharedRuntime.hpp"
43 #include "runtime/stubRoutines.hpp"
44 #include "runtime/synchronizer.hpp"
45 #include "utilities/macros.hpp"
46
47 #define __ Disassembler::hook<InterpreterMacroAssembler>(__FILE__, __LINE__, _masm)->
48
49 // Global Register Names
50 static const Register rbcp = LP64_ONLY(r13) NOT_LP64(rsi);
51 static const Register rlocals = LP64_ONLY(r14) NOT_LP64(rdi);
52
53 // Address Computation: local variables
54 static inline Address iaddress(int n) {
55 return Address(rlocals, Interpreter::local_offset_in_bytes(n));
56 }
57
58 static inline Address laddress(int n) {
59 return iaddress(n + 1);
60 }
61
62 #ifndef _LP64
63 static inline Address haddress(int n) {
64 return iaddress(n + 0);
65 }
66 #endif
67
68 static inline Address faddress(int n) {
69 return iaddress(n);
70 }
71
72 static inline Address daddress(int n) {
73 return laddress(n);
74 }
75
76 static inline Address aaddress(int n) {
77 return iaddress(n);
78 }
79
80 static inline Address iaddress(Register r) {
81 return Address(rlocals, r, Address::times_ptr);
82 }
83
84 static inline Address laddress(Register r) {
85 return Address(rlocals, r, Address::times_ptr, Interpreter::local_offset_in_bytes(1));
86 }
87
88 #ifndef _LP64
89 static inline Address haddress(Register r) {
90 return Address(rlocals, r, Interpreter::stackElementScale(), Interpreter::local_offset_in_bytes(0));
91 }
92 #endif
93
94 static inline Address faddress(Register r) {
95 return iaddress(r);
96 }
97
98 static inline Address daddress(Register r) {
99 return laddress(r);
100 }
101
102 static inline Address aaddress(Register r) {
103 return iaddress(r);
104 }
105
106
107 // expression stack
108 // (Note: Must not use symmetric equivalents at_rsp_m1/2 since they store
109 // data beyond the rsp which is potentially unsafe in an MT environment;
110 // an interrupt may overwrite that data.)
111 static inline Address at_rsp () {
112 return Address(rsp, 0);
113 }
114
115 // At top of Java expression stack which may be different than esp(). It
116 // isn't for category 1 objects.
117 static inline Address at_tos () {
118 return Address(rsp, Interpreter::expr_offset_in_bytes(0));
119 }
120
121 static inline Address at_tos_p1() {
122 return Address(rsp, Interpreter::expr_offset_in_bytes(1));
123 }
124
125 static inline Address at_tos_p2() {
126 return Address(rsp, Interpreter::expr_offset_in_bytes(2));
127 }
128
129 // Condition conversion
130 static Assembler::Condition j_not(TemplateTable::Condition cc) {
131 switch (cc) {
132 case TemplateTable::equal : return Assembler::notEqual;
133 case TemplateTable::not_equal : return Assembler::equal;
134 case TemplateTable::less : return Assembler::greaterEqual;
135 case TemplateTable::less_equal : return Assembler::greater;
136 case TemplateTable::greater : return Assembler::lessEqual;
137 case TemplateTable::greater_equal: return Assembler::less;
138 }
139 ShouldNotReachHere();
140 return Assembler::zero;
141 }
142
143
144
145 // Miscellaneous helper routines
146 // Store an oop (or NULL) at the address described by obj.
147 // If val == noreg this means store a NULL
148
149
150 static void do_oop_store(InterpreterMacroAssembler* _masm,
151 Address dst,
152 Register val,
153 DecoratorSet decorators = 0) {
154 assert(val == noreg || val == rax, "parameter is just for looks");
155 __ store_heap_oop(dst, val,
156 NOT_LP64(rdx) LP64_ONLY(rscratch2),
157 NOT_LP64(rbx) LP64_ONLY(r9),
158 NOT_LP64(rsi) LP64_ONLY(r8), 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_aputfield:
182 case Bytecodes::_fast_bputfield:
183 case Bytecodes::_fast_zputfield:
184 case Bytecodes::_fast_cputfield:
185 case Bytecodes::_fast_dputfield:
186 case Bytecodes::_fast_fputfield:
187 case Bytecodes::_fast_iputfield:
188 case Bytecodes::_fast_lputfield:
189 case Bytecodes::_fast_sputfield:
190 {
191 // We skip bytecode quickening for putfield instructions when
192 // the put_code written to the constant pool cache is zero.
193 // This is required so that every execution of this instruction
194 // calls out to InterpreterRuntime::resolve_get_put to do
195 // additional, required work.
196 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");
197 assert(load_bc_into_bc_reg, "we use bc_reg as temp");
198 __ get_cache_and_index_and_bytecode_at_bcp(temp_reg, bc_reg, temp_reg, byte_no, 1);
199 __ movl(bc_reg, bc);
200 __ cmpl(temp_reg, (int) 0);
201 __ jcc(Assembler::zero, L_patch_done); // don't patch
202 }
203 break;
204 default:
205 assert(byte_no == -1, "sanity");
206 // the pair bytecodes have already done the load.
207 if (load_bc_into_bc_reg) {
208 __ movl(bc_reg, bc);
209 }
210 }
211
212 if (JvmtiExport::can_post_breakpoint()) {
213 Label L_fast_patch;
214 // if a breakpoint is present we can't rewrite the stream directly
215 __ movzbl(temp_reg, at_bcp(0));
216 __ cmpl(temp_reg, Bytecodes::_breakpoint);
217 __ jcc(Assembler::notEqual, L_fast_patch);
218 __ get_method(temp_reg);
219 // Let breakpoint table handling rewrite to quicker bytecode
220 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::set_original_bytecode_at), temp_reg, rbcp, bc_reg);
221 #ifndef ASSERT
222 __ jmpb(L_patch_done);
223 #else
224 __ jmp(L_patch_done);
225 #endif
226 __ bind(L_fast_patch);
227 }
228
229 #ifdef ASSERT
230 Label L_okay;
231 __ load_unsigned_byte(temp_reg, at_bcp(0));
232 __ cmpl(temp_reg, (int) Bytecodes::java_code(bc));
233 __ jcc(Assembler::equal, L_okay);
234 __ cmpl(temp_reg, bc_reg);
235 __ jcc(Assembler::equal, L_okay);
236 __ stop("patching the wrong bytecode");
237 __ bind(L_okay);
238 #endif
239
240 // patch bytecode
241 __ movb(at_bcp(0), bc_reg);
242 __ bind(L_patch_done);
243 }
244 // Individual instructions
245
246
247 void TemplateTable::nop() {
248 transition(vtos, vtos);
249 // nothing to do
250 }
251
252 void TemplateTable::shouldnotreachhere() {
253 transition(vtos, vtos);
254 __ stop("shouldnotreachhere bytecode");
255 }
256
257 void TemplateTable::aconst_null() {
258 transition(vtos, atos);
259 __ xorl(rax, rax);
260 }
261
262 void TemplateTable::iconst(int value) {
263 transition(vtos, itos);
264 if (value == 0) {
265 __ xorl(rax, rax);
266 } else {
267 __ movl(rax, value);
268 }
269 }
270
271 void TemplateTable::lconst(int value) {
272 transition(vtos, ltos);
273 if (value == 0) {
274 __ xorl(rax, rax);
275 } else {
276 __ movl(rax, value);
277 }
278 #ifndef _LP64
279 assert(value >= 0, "check this code");
280 __ xorptr(rdx, rdx);
281 #endif
282 }
283
284
285
286 void TemplateTable::fconst(int value) {
287 transition(vtos, ftos);
288 if (UseSSE >= 1) {
289 static float one = 1.0f, two = 2.0f;
290 switch (value) {
291 case 0:
292 __ xorps(xmm0, xmm0);
293 break;
294 case 1:
295 __ movflt(xmm0, ExternalAddress((address) &one), rscratch1);
296 break;
297 case 2:
298 __ movflt(xmm0, ExternalAddress((address) &two), rscratch1);
299 break;
300 default:
301 ShouldNotReachHere();
302 break;
303 }
304 } else {
305 #ifdef _LP64
306 ShouldNotReachHere();
307 #else
308 if (value == 0) { __ fldz();
309 } else if (value == 1) { __ fld1();
310 } else if (value == 2) { __ fld1(); __ fld1(); __ faddp(); // should do a better solution here
311 } else { ShouldNotReachHere();
312 }
313 #endif // _LP64
314 }
315 }
316
317 void TemplateTable::dconst(int value) {
318 transition(vtos, dtos);
319 if (UseSSE >= 2) {
320 static double one = 1.0;
321 switch (value) {
322 case 0:
323 __ xorpd(xmm0, xmm0);
324 break;
325 case 1:
326 __ movdbl(xmm0, ExternalAddress((address) &one), rscratch1);
327 break;
328 default:
329 ShouldNotReachHere();
330 break;
331 }
332 } else {
333 #ifdef _LP64
334 ShouldNotReachHere();
335 #else
336 if (value == 0) { __ fldz();
337 } else if (value == 1) { __ fld1();
338 } else { ShouldNotReachHere();
339 }
340 #endif
341 }
342 }
343
344 void TemplateTable::bipush() {
345 transition(vtos, itos);
346 __ load_signed_byte(rax, at_bcp(1));
347 }
348
349 void TemplateTable::sipush() {
350 transition(vtos, itos);
351 __ load_unsigned_short(rax, at_bcp(1));
352 __ bswapl(rax);
353 __ sarl(rax, 16);
354 }
355
356 void TemplateTable::ldc(LdcType type) {
357 transition(vtos, vtos);
358 Register rarg = NOT_LP64(rcx) LP64_ONLY(c_rarg1);
359 Label call_ldc, notFloat, notClass, notInt, Done;
360
361 if (is_ldc_wide(type)) {
362 __ get_unsigned_2_byte_index_at_bcp(rbx, 1);
363 } else {
364 __ load_unsigned_byte(rbx, at_bcp(1));
365 }
366
367 __ get_cpool_and_tags(rcx, rax);
368 const int base_offset = ConstantPool::header_size() * wordSize;
369 const int tags_offset = Array<u1>::base_offset_in_bytes();
370
371 // get type
372 __ movzbl(rdx, Address(rax, rbx, Address::times_1, tags_offset));
373
374 // unresolved class - get the resolved class
375 __ cmpl(rdx, JVM_CONSTANT_UnresolvedClass);
376 __ jccb(Assembler::equal, call_ldc);
377
378 // unresolved class in error state - call into runtime to throw the error
379 // from the first resolution attempt
380 __ cmpl(rdx, JVM_CONSTANT_UnresolvedClassInError);
381 __ jccb(Assembler::equal, call_ldc);
382
383 // resolved class - need to call vm to get java mirror of the class
384 __ cmpl(rdx, JVM_CONSTANT_Class);
385 __ jcc(Assembler::notEqual, notClass);
386
387 __ bind(call_ldc);
388
389 __ movl(rarg, is_ldc_wide(type) ? 1 : 0);
390 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::ldc), rarg);
391
392 __ push(atos);
393 __ jmp(Done);
394
395 __ bind(notClass);
396 __ cmpl(rdx, JVM_CONSTANT_Float);
397 __ jccb(Assembler::notEqual, notFloat);
398
399 // ftos
400 __ load_float(Address(rcx, rbx, Address::times_ptr, base_offset));
401 __ push(ftos);
402 __ jmp(Done);
403
404 __ bind(notFloat);
405 __ cmpl(rdx, JVM_CONSTANT_Integer);
406 __ jccb(Assembler::notEqual, notInt);
407
408 // itos
409 __ movl(rax, Address(rcx, rbx, Address::times_ptr, base_offset));
410 __ push(itos);
411 __ jmp(Done);
412
413 // assume the tag is for condy; if not, the VM runtime will tell us
414 __ bind(notInt);
415 condy_helper(Done);
416
417 __ bind(Done);
418 }
419
420 // Fast path for caching oop constants.
421 void TemplateTable::fast_aldc(LdcType type) {
422 transition(vtos, atos);
423
424 Register result = rax;
425 Register tmp = rdx;
426 Register rarg = NOT_LP64(rcx) LP64_ONLY(c_rarg1);
427 int index_size = is_ldc_wide(type) ? sizeof(u2) : sizeof(u1);
428
429 Label resolved;
430
431 // We are resolved if the resolved reference cache entry contains a
432 // non-null object (String, MethodType, etc.)
433 assert_different_registers(result, tmp);
434 __ get_cache_index_at_bcp(tmp, 1, index_size);
435 __ load_resolved_reference_at_index(result, tmp);
436 __ testptr(result, result);
437 __ jcc(Assembler::notZero, resolved);
438
439 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc);
440
441 // first time invocation - must resolve first
442 __ movl(rarg, (int)bytecode());
443 __ call_VM(result, entry, rarg);
444 __ bind(resolved);
445
446 { // Check for the null sentinel.
447 // If we just called the VM, it already did the mapping for us,
448 // but it's harmless to retry.
449 Label notNull;
450 ExternalAddress null_sentinel((address)Universe::the_null_sentinel_addr());
451 __ movptr(tmp, null_sentinel);
452 __ resolve_oop_handle(tmp, rscratch2);
453 __ cmpoop(tmp, result);
454 __ jccb(Assembler::notEqual, notNull);
455 __ xorptr(result, result); // NULL object reference
456 __ bind(notNull);
457 }
458
459 if (VerifyOops) {
460 __ verify_oop(result);
461 }
462 }
463
464 void TemplateTable::ldc2_w() {
465 transition(vtos, vtos);
466 Label notDouble, notLong, Done;
467 __ get_unsigned_2_byte_index_at_bcp(rbx, 1);
468
469 __ get_cpool_and_tags(rcx, rax);
470 const int base_offset = ConstantPool::header_size() * wordSize;
471 const int tags_offset = Array<u1>::base_offset_in_bytes();
472
473 // get type
474 __ movzbl(rdx, Address(rax, rbx, Address::times_1, tags_offset));
475 __ cmpl(rdx, JVM_CONSTANT_Double);
476 __ jccb(Assembler::notEqual, notDouble);
477
478 // dtos
479 __ load_double(Address(rcx, rbx, Address::times_ptr, base_offset));
480 __ push(dtos);
481
482 __ jmp(Done);
483 __ bind(notDouble);
484 __ cmpl(rdx, JVM_CONSTANT_Long);
485 __ jccb(Assembler::notEqual, notLong);
486
487 // ltos
488 __ movptr(rax, Address(rcx, rbx, Address::times_ptr, base_offset + 0 * wordSize));
489 NOT_LP64(__ movptr(rdx, Address(rcx, rbx, Address::times_ptr, base_offset + 1 * wordSize)));
490 __ push(ltos);
491 __ jmp(Done);
492
493 __ bind(notLong);
494 condy_helper(Done);
495
496 __ bind(Done);
497 }
498
499 void TemplateTable::condy_helper(Label& Done) {
500 const Register obj = rax;
501 const Register off = rbx;
502 const Register flags = rcx;
503 const Register rarg = NOT_LP64(rcx) LP64_ONLY(c_rarg1);
504 __ movl(rarg, (int)bytecode());
505 call_VM(obj, CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc), rarg);
506 #ifndef _LP64
507 // borrow rdi from locals
508 __ get_thread(rdi);
509 __ get_vm_result_2(flags, rdi);
510 __ restore_locals();
511 #else
512 __ get_vm_result_2(flags, r15_thread);
513 #endif
514 // VMr = obj = base address to find primitive value to push
515 // VMr2 = flags = (tos, off) using format of CPCE::_flags
516 __ movl(off, flags);
517 __ andl(off, ConstantPoolCacheEntry::field_index_mask);
518 const Address field(obj, off, Address::times_1, 0*wordSize);
519
520 // What sort of thing are we loading?
521 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift);
522 __ andl(flags, ConstantPoolCacheEntry::tos_state_mask);
523
524 switch (bytecode()) {
525 case Bytecodes::_ldc:
526 case Bytecodes::_ldc_w:
527 {
528 // tos in (itos, ftos, stos, btos, ctos, ztos)
529 Label notInt, notFloat, notShort, notByte, notChar, notBool;
530 __ cmpl(flags, itos);
531 __ jccb(Assembler::notEqual, notInt);
532 // itos
533 __ movl(rax, field);
534 __ push(itos);
535 __ jmp(Done);
536
537 __ bind(notInt);
538 __ cmpl(flags, ftos);
539 __ jccb(Assembler::notEqual, notFloat);
540 // ftos
541 __ load_float(field);
542 __ push(ftos);
543 __ jmp(Done);
544
545 __ bind(notFloat);
546 __ cmpl(flags, stos);
547 __ jccb(Assembler::notEqual, notShort);
548 // stos
549 __ load_signed_short(rax, field);
550 __ push(stos);
551 __ jmp(Done);
552
553 __ bind(notShort);
554 __ cmpl(flags, btos);
555 __ jccb(Assembler::notEqual, notByte);
556 // btos
557 __ load_signed_byte(rax, field);
558 __ push(btos);
559 __ jmp(Done);
560
561 __ bind(notByte);
562 __ cmpl(flags, ctos);
563 __ jccb(Assembler::notEqual, notChar);
564 // ctos
565 __ load_unsigned_short(rax, field);
566 __ push(ctos);
567 __ jmp(Done);
568
569 __ bind(notChar);
570 __ cmpl(flags, ztos);
571 __ jccb(Assembler::notEqual, notBool);
572 // ztos
573 __ load_signed_byte(rax, field);
574 __ push(ztos);
575 __ jmp(Done);
576
577 __ bind(notBool);
578 break;
579 }
580
581 case Bytecodes::_ldc2_w:
582 {
583 Label notLong, notDouble;
584 __ cmpl(flags, ltos);
585 __ jccb(Assembler::notEqual, notLong);
586 // ltos
587 // Loading high word first because movptr clobbers rax
588 NOT_LP64(__ movptr(rdx, field.plus_disp(4)));
589 __ movptr(rax, field);
590 __ push(ltos);
591 __ jmp(Done);
592
593 __ bind(notLong);
594 __ cmpl(flags, dtos);
595 __ jccb(Assembler::notEqual, notDouble);
596 // dtos
597 __ load_double(field);
598 __ push(dtos);
599 __ jmp(Done);
600
601 __ bind(notDouble);
602 break;
603 }
604
605 default:
606 ShouldNotReachHere();
607 }
608
609 __ stop("bad ldc/condy");
610 }
611
612 void TemplateTable::locals_index(Register reg, int offset) {
613 __ load_unsigned_byte(reg, at_bcp(offset));
614 __ negptr(reg);
615 }
616
617 void TemplateTable::iload() {
618 iload_internal();
619 }
620
621 void TemplateTable::nofast_iload() {
622 iload_internal(may_not_rewrite);
623 }
624
625 void TemplateTable::iload_internal(RewriteControl rc) {
626 transition(vtos, itos);
627 if (RewriteFrequentPairs && rc == may_rewrite) {
628 Label rewrite, done;
629 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
630 LP64_ONLY(assert(rbx != bc, "register damaged"));
631
632 // get next byte
633 __ load_unsigned_byte(rbx,
634 at_bcp(Bytecodes::length_for(Bytecodes::_iload)));
635 // if _iload, wait to rewrite to iload2. We only want to rewrite the
636 // last two iloads in a pair. Comparing against fast_iload means that
637 // the next bytecode is neither an iload or a caload, and therefore
638 // an iload pair.
639 __ cmpl(rbx, Bytecodes::_iload);
640 __ jcc(Assembler::equal, done);
641
642 __ cmpl(rbx, Bytecodes::_fast_iload);
643 __ movl(bc, Bytecodes::_fast_iload2);
644
645 __ jccb(Assembler::equal, rewrite);
646
647 // if _caload, rewrite to fast_icaload
648 __ cmpl(rbx, Bytecodes::_caload);
649 __ movl(bc, Bytecodes::_fast_icaload);
650 __ jccb(Assembler::equal, rewrite);
651
652 // rewrite so iload doesn't check again.
653 __ movl(bc, Bytecodes::_fast_iload);
654
655 // rewrite
656 // bc: fast bytecode
657 __ bind(rewrite);
658 patch_bytecode(Bytecodes::_iload, bc, rbx, false);
659 __ bind(done);
660 }
661
662 // Get the local value into tos
663 locals_index(rbx);
664 __ movl(rax, iaddress(rbx));
665 }
666
667 void TemplateTable::fast_iload2() {
668 transition(vtos, itos);
669 locals_index(rbx);
670 __ movl(rax, iaddress(rbx));
671 __ push(itos);
672 locals_index(rbx, 3);
673 __ movl(rax, iaddress(rbx));
674 }
675
676 void TemplateTable::fast_iload() {
677 transition(vtos, itos);
678 locals_index(rbx);
679 __ movl(rax, iaddress(rbx));
680 }
681
682 void TemplateTable::lload() {
683 transition(vtos, ltos);
684 locals_index(rbx);
685 __ movptr(rax, laddress(rbx));
686 NOT_LP64(__ movl(rdx, haddress(rbx)));
687 }
688
689 void TemplateTable::fload() {
690 transition(vtos, ftos);
691 locals_index(rbx);
692 __ load_float(faddress(rbx));
693 }
694
695 void TemplateTable::dload() {
696 transition(vtos, dtos);
697 locals_index(rbx);
698 __ load_double(daddress(rbx));
699 }
700
701 void TemplateTable::aload() {
702 transition(vtos, atos);
703 locals_index(rbx);
704 __ movptr(rax, aaddress(rbx));
705 }
706
707 void TemplateTable::locals_index_wide(Register reg) {
708 __ load_unsigned_short(reg, at_bcp(2));
709 __ bswapl(reg);
710 __ shrl(reg, 16);
711 __ negptr(reg);
712 }
713
714 void TemplateTable::wide_iload() {
715 transition(vtos, itos);
716 locals_index_wide(rbx);
717 __ movl(rax, iaddress(rbx));
718 }
719
720 void TemplateTable::wide_lload() {
721 transition(vtos, ltos);
722 locals_index_wide(rbx);
723 __ movptr(rax, laddress(rbx));
724 NOT_LP64(__ movl(rdx, haddress(rbx)));
725 }
726
727 void TemplateTable::wide_fload() {
728 transition(vtos, ftos);
729 locals_index_wide(rbx);
730 __ load_float(faddress(rbx));
731 }
732
733 void TemplateTable::wide_dload() {
734 transition(vtos, dtos);
735 locals_index_wide(rbx);
736 __ load_double(daddress(rbx));
737 }
738
739 void TemplateTable::wide_aload() {
740 transition(vtos, atos);
741 locals_index_wide(rbx);
742 __ movptr(rax, aaddress(rbx));
743 }
744
745 void TemplateTable::index_check(Register array, Register index) {
746 // Pop ptr into array
747 __ pop_ptr(array);
748 index_check_without_pop(array, index);
749 }
750
751 void TemplateTable::index_check_without_pop(Register array, Register index) {
752 // destroys rbx
753 // check array
754 __ null_check(array, arrayOopDesc::length_offset_in_bytes());
755 // sign extend index for use by indexed load
756 __ movl2ptr(index, index);
757 // check index
758 __ cmpl(index, Address(array, arrayOopDesc::length_offset_in_bytes()));
759 if (index != rbx) {
760 // ??? convention: move aberrant index into rbx for exception message
761 assert(rbx != array, "different registers");
762 __ movl(rbx, index);
763 }
764 Label skip;
765 __ jccb(Assembler::below, skip);
766 // Pass array to create more detailed exceptions.
767 __ mov(NOT_LP64(rax) LP64_ONLY(c_rarg1), array);
768 __ jump(ExternalAddress(Interpreter::_throw_ArrayIndexOutOfBoundsException_entry));
769 __ bind(skip);
770 }
771
772 void TemplateTable::iaload() {
773 transition(itos, itos);
774 // rax: index
775 // rdx: array
776 index_check(rdx, rax); // kills rbx
777 __ access_load_at(T_INT, IN_HEAP | IS_ARRAY, rax,
778 Address(rdx, rax, Address::times_4,
779 arrayOopDesc::base_offset_in_bytes(T_INT)),
780 noreg, noreg);
781 }
782
783 void TemplateTable::laload() {
784 transition(itos, ltos);
785 // rax: index
786 // rdx: array
787 index_check(rdx, rax); // kills rbx
788 NOT_LP64(__ mov(rbx, rax));
789 // rbx,: index
790 __ access_load_at(T_LONG, IN_HEAP | IS_ARRAY, noreg /* ltos */,
791 Address(rdx, rbx, Address::times_8,
792 arrayOopDesc::base_offset_in_bytes(T_LONG)),
793 noreg, noreg);
794 }
795
796
797
798 void TemplateTable::faload() {
799 transition(itos, ftos);
800 // rax: index
801 // rdx: array
802 index_check(rdx, rax); // kills rbx
803 __ access_load_at(T_FLOAT, IN_HEAP | IS_ARRAY, noreg /* ftos */,
804 Address(rdx, rax,
805 Address::times_4,
806 arrayOopDesc::base_offset_in_bytes(T_FLOAT)),
807 noreg, noreg);
808 }
809
810 void TemplateTable::daload() {
811 transition(itos, dtos);
812 // rax: index
813 // rdx: array
814 index_check(rdx, rax); // kills rbx
815 __ access_load_at(T_DOUBLE, IN_HEAP | IS_ARRAY, noreg /* dtos */,
816 Address(rdx, rax,
817 Address::times_8,
818 arrayOopDesc::base_offset_in_bytes(T_DOUBLE)),
819 noreg, noreg);
820 }
821
822 void TemplateTable::aaload() {
823 transition(itos, atos);
824 // rax: index
825 // rdx: array
826 index_check(rdx, rax); // kills rbx
827 do_oop_load(_masm,
828 Address(rdx, rax,
829 UseCompressedOops ? Address::times_4 : Address::times_ptr,
830 arrayOopDesc::base_offset_in_bytes(T_OBJECT)),
831 rax,
832 IS_ARRAY);
833 }
834
835 void TemplateTable::baload() {
836 transition(itos, itos);
837 // rax: index
838 // rdx: array
839 index_check(rdx, rax); // kills rbx
840 __ access_load_at(T_BYTE, IN_HEAP | IS_ARRAY, rax,
841 Address(rdx, rax, Address::times_1, arrayOopDesc::base_offset_in_bytes(T_BYTE)),
842 noreg, noreg);
843 }
844
845 void TemplateTable::caload() {
846 transition(itos, itos);
847 // rax: index
848 // rdx: array
849 index_check(rdx, rax); // kills rbx
850 __ access_load_at(T_CHAR, IN_HEAP | IS_ARRAY, rax,
851 Address(rdx, rax, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR)),
852 noreg, noreg);
853 }
854
855 // iload followed by caload frequent pair
856 void TemplateTable::fast_icaload() {
857 transition(vtos, itos);
858 // load index out of locals
859 locals_index(rbx);
860 __ movl(rax, iaddress(rbx));
861
862 // rax: index
863 // rdx: array
864 index_check(rdx, rax); // kills rbx
865 __ access_load_at(T_CHAR, IN_HEAP | IS_ARRAY, rax,
866 Address(rdx, rax, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR)),
867 noreg, noreg);
868 }
869
870
871 void TemplateTable::saload() {
872 transition(itos, itos);
873 // rax: index
874 // rdx: array
875 index_check(rdx, rax); // kills rbx
876 __ access_load_at(T_SHORT, IN_HEAP | IS_ARRAY, rax,
877 Address(rdx, rax, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_SHORT)),
878 noreg, noreg);
879 }
880
881 void TemplateTable::iload(int n) {
882 transition(vtos, itos);
883 __ movl(rax, iaddress(n));
884 }
885
886 void TemplateTable::lload(int n) {
887 transition(vtos, ltos);
888 __ movptr(rax, laddress(n));
889 NOT_LP64(__ movptr(rdx, haddress(n)));
890 }
891
892 void TemplateTable::fload(int n) {
893 transition(vtos, ftos);
894 __ load_float(faddress(n));
895 }
896
897 void TemplateTable::dload(int n) {
898 transition(vtos, dtos);
899 __ load_double(daddress(n));
900 }
901
902 void TemplateTable::aload(int n) {
903 transition(vtos, atos);
904 __ movptr(rax, aaddress(n));
905 }
906
907 void TemplateTable::aload_0() {
908 aload_0_internal();
909 }
910
911 void TemplateTable::nofast_aload_0() {
912 aload_0_internal(may_not_rewrite);
913 }
914
915 void TemplateTable::aload_0_internal(RewriteControl rc) {
916 transition(vtos, atos);
917 // According to bytecode histograms, the pairs:
918 //
919 // _aload_0, _fast_igetfield
920 // _aload_0, _fast_agetfield
921 // _aload_0, _fast_fgetfield
922 //
923 // occur frequently. If RewriteFrequentPairs is set, the (slow)
924 // _aload_0 bytecode checks if the next bytecode is either
925 // _fast_igetfield, _fast_agetfield or _fast_fgetfield and then
926 // rewrites the current bytecode into a pair bytecode; otherwise it
927 // rewrites the current bytecode into _fast_aload_0 that doesn't do
928 // the pair check anymore.
929 //
930 // Note: If the next bytecode is _getfield, the rewrite must be
931 // delayed, otherwise we may miss an opportunity for a pair.
932 //
933 // Also rewrite frequent pairs
934 // aload_0, aload_1
935 // aload_0, iload_1
936 // These bytecodes with a small amount of code are most profitable
937 // to rewrite
938 if (RewriteFrequentPairs && rc == may_rewrite) {
939 Label rewrite, done;
940
941 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
942 LP64_ONLY(assert(rbx != bc, "register damaged"));
943
944 // get next byte
945 __ load_unsigned_byte(rbx, at_bcp(Bytecodes::length_for(Bytecodes::_aload_0)));
946
947 // if _getfield then wait with rewrite
948 __ cmpl(rbx, Bytecodes::_getfield);
949 __ jcc(Assembler::equal, done);
950
951 // if _igetfield then rewrite to _fast_iaccess_0
952 assert(Bytecodes::java_code(Bytecodes::_fast_iaccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
953 __ cmpl(rbx, Bytecodes::_fast_igetfield);
954 __ movl(bc, Bytecodes::_fast_iaccess_0);
955 __ jccb(Assembler::equal, rewrite);
956
957 // if _agetfield then rewrite to _fast_aaccess_0
958 assert(Bytecodes::java_code(Bytecodes::_fast_aaccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
959 __ cmpl(rbx, Bytecodes::_fast_agetfield);
960 __ movl(bc, Bytecodes::_fast_aaccess_0);
961 __ jccb(Assembler::equal, rewrite);
962
963 // if _fgetfield then rewrite to _fast_faccess_0
964 assert(Bytecodes::java_code(Bytecodes::_fast_faccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
965 __ cmpl(rbx, Bytecodes::_fast_fgetfield);
966 __ movl(bc, Bytecodes::_fast_faccess_0);
967 __ jccb(Assembler::equal, rewrite);
968
969 // else rewrite to _fast_aload0
970 assert(Bytecodes::java_code(Bytecodes::_fast_aload_0) == Bytecodes::_aload_0, "fix bytecode definition");
971 __ movl(bc, Bytecodes::_fast_aload_0);
972
973 // rewrite
974 // bc: fast bytecode
975 __ bind(rewrite);
976 patch_bytecode(Bytecodes::_aload_0, bc, rbx, false);
977
978 __ bind(done);
979 }
980
981 // Do actual aload_0 (must do this after patch_bytecode which might call VM and GC might change oop).
982 aload(0);
983 }
984
985 void TemplateTable::istore() {
986 transition(itos, vtos);
987 locals_index(rbx);
988 __ movl(iaddress(rbx), rax);
989 }
990
991
992 void TemplateTable::lstore() {
993 transition(ltos, vtos);
994 locals_index(rbx);
995 __ movptr(laddress(rbx), rax);
996 NOT_LP64(__ movptr(haddress(rbx), rdx));
997 }
998
999 void TemplateTable::fstore() {
1000 transition(ftos, vtos);
1001 locals_index(rbx);
1002 __ store_float(faddress(rbx));
1003 }
1004
1005 void TemplateTable::dstore() {
1006 transition(dtos, vtos);
1007 locals_index(rbx);
1008 __ store_double(daddress(rbx));
1009 }
1010
1011 void TemplateTable::astore() {
1012 transition(vtos, vtos);
1013 __ pop_ptr(rax);
1014 locals_index(rbx);
1015 __ movptr(aaddress(rbx), rax);
1016 }
1017
1018 void TemplateTable::wide_istore() {
1019 transition(vtos, vtos);
1020 __ pop_i();
1021 locals_index_wide(rbx);
1022 __ movl(iaddress(rbx), rax);
1023 }
1024
1025 void TemplateTable::wide_lstore() {
1026 transition(vtos, vtos);
1027 NOT_LP64(__ pop_l(rax, rdx));
1028 LP64_ONLY(__ pop_l());
1029 locals_index_wide(rbx);
1030 __ movptr(laddress(rbx), rax);
1031 NOT_LP64(__ movl(haddress(rbx), rdx));
1032 }
1033
1034 void TemplateTable::wide_fstore() {
1035 #ifdef _LP64
1036 transition(vtos, vtos);
1037 __ pop_f(xmm0);
1038 locals_index_wide(rbx);
1039 __ movflt(faddress(rbx), xmm0);
1040 #else
1041 wide_istore();
1042 #endif
1043 }
1044
1045 void TemplateTable::wide_dstore() {
1046 #ifdef _LP64
1047 transition(vtos, vtos);
1048 __ pop_d(xmm0);
1049 locals_index_wide(rbx);
1050 __ movdbl(daddress(rbx), xmm0);
1051 #else
1052 wide_lstore();
1053 #endif
1054 }
1055
1056 void TemplateTable::wide_astore() {
1057 transition(vtos, vtos);
1058 __ pop_ptr(rax);
1059 locals_index_wide(rbx);
1060 __ movptr(aaddress(rbx), rax);
1061 }
1062
1063 void TemplateTable::iastore() {
1064 transition(itos, vtos);
1065 __ pop_i(rbx);
1066 // rax: value
1067 // rbx: index
1068 // rdx: array
1069 index_check(rdx, rbx); // prefer index in rbx
1070 __ access_store_at(T_INT, IN_HEAP | IS_ARRAY,
1071 Address(rdx, rbx, Address::times_4,
1072 arrayOopDesc::base_offset_in_bytes(T_INT)),
1073 rax, noreg, noreg, noreg);
1074 }
1075
1076 void TemplateTable::lastore() {
1077 transition(ltos, vtos);
1078 __ pop_i(rbx);
1079 // rax,: low(value)
1080 // rcx: array
1081 // rdx: high(value)
1082 index_check(rcx, rbx); // prefer index in rbx,
1083 // rbx,: index
1084 __ access_store_at(T_LONG, IN_HEAP | IS_ARRAY,
1085 Address(rcx, rbx, Address::times_8,
1086 arrayOopDesc::base_offset_in_bytes(T_LONG)),
1087 noreg /* ltos */, noreg, noreg, noreg);
1088 }
1089
1090
1091 void TemplateTable::fastore() {
1092 transition(ftos, vtos);
1093 __ pop_i(rbx);
1094 // value is in UseSSE >= 1 ? xmm0 : ST(0)
1095 // rbx: index
1096 // rdx: array
1097 index_check(rdx, rbx); // prefer index in rbx
1098 __ access_store_at(T_FLOAT, IN_HEAP | IS_ARRAY,
1099 Address(rdx, rbx, Address::times_4,
1100 arrayOopDesc::base_offset_in_bytes(T_FLOAT)),
1101 noreg /* ftos */, noreg, noreg, noreg);
1102 }
1103
1104 void TemplateTable::dastore() {
1105 transition(dtos, vtos);
1106 __ pop_i(rbx);
1107 // value is in UseSSE >= 2 ? xmm0 : ST(0)
1108 // rbx: index
1109 // rdx: array
1110 index_check(rdx, rbx); // prefer index in rbx
1111 __ access_store_at(T_DOUBLE, IN_HEAP | IS_ARRAY,
1112 Address(rdx, rbx, Address::times_8,
1113 arrayOopDesc::base_offset_in_bytes(T_DOUBLE)),
1114 noreg /* dtos */, noreg, noreg, noreg);
1115 }
1116
1117 void TemplateTable::aastore() {
1118 Label is_null, ok_is_subtype, done;
1119 transition(vtos, vtos);
1120 // stack: ..., array, index, value
1121 __ movptr(rax, at_tos()); // value
1122 __ movl(rcx, at_tos_p1()); // index
1123 __ movptr(rdx, at_tos_p2()); // array
1124
1125 Address element_address(rdx, rcx,
1126 UseCompressedOops? Address::times_4 : Address::times_ptr,
1127 arrayOopDesc::base_offset_in_bytes(T_OBJECT));
1128
1129 index_check_without_pop(rdx, rcx); // kills rbx
1130 __ testptr(rax, rax);
1131 __ jcc(Assembler::zero, is_null);
1132
1133 // Move subklass into rbx
1134 __ load_klass(rbx, rax, rscratch1);
1135 // Move superklass into rax
1136 __ load_klass(rax, rdx, rscratch1);
1137 __ movptr(rax, Address(rax,
1138 ObjArrayKlass::element_klass_offset()));
1139
1140 // Generate subtype check. Blows rcx, rdi
1141 // Superklass in rax. Subklass in rbx.
1142 __ gen_subtype_check(rbx, ok_is_subtype);
1143
1144 // Come here on failure
1145 // object is at TOS
1146 __ jump(ExternalAddress(Interpreter::_throw_ArrayStoreException_entry));
1147
1148 // Come here on success
1149 __ bind(ok_is_subtype);
1150
1151 // Get the value we will store
1152 __ movptr(rax, at_tos());
1153 __ movl(rcx, at_tos_p1()); // index
1154 // Now store using the appropriate barrier
1155 do_oop_store(_masm, element_address, rax, IS_ARRAY);
1156 __ jmp(done);
1157
1158 // Have a NULL in rax, rdx=array, ecx=index. Store NULL at ary[idx]
1159 __ bind(is_null);
1160 __ profile_null_seen(rbx);
1161
1162 // Store a NULL
1163 do_oop_store(_masm, element_address, noreg, IS_ARRAY);
1164
1165 // Pop stack arguments
1166 __ bind(done);
1167 __ addptr(rsp, 3 * Interpreter::stackElementSize);
1168 }
1169
1170 void TemplateTable::bastore() {
1171 transition(itos, vtos);
1172 __ pop_i(rbx);
1173 // rax: value
1174 // rbx: index
1175 // rdx: array
1176 index_check(rdx, rbx); // prefer index in rbx
1177 // Need to check whether array is boolean or byte
1178 // since both types share the bastore bytecode.
1179 __ load_klass(rcx, rdx, rscratch1);
1180 __ movl(rcx, Address(rcx, Klass::layout_helper_offset()));
1181 int diffbit = Klass::layout_helper_boolean_diffbit();
1182 __ testl(rcx, diffbit);
1183 Label L_skip;
1184 __ jccb(Assembler::zero, L_skip);
1185 __ andl(rax, 1); // if it is a T_BOOLEAN array, mask the stored value to 0/1
1186 __ bind(L_skip);
1187 __ access_store_at(T_BYTE, IN_HEAP | IS_ARRAY,
1188 Address(rdx, rbx,Address::times_1,
1189 arrayOopDesc::base_offset_in_bytes(T_BYTE)),
1190 rax, noreg, noreg, noreg);
1191 }
1192
1193 void TemplateTable::castore() {
1194 transition(itos, vtos);
1195 __ pop_i(rbx);
1196 // rax: value
1197 // rbx: index
1198 // rdx: array
1199 index_check(rdx, rbx); // prefer index in rbx
1200 __ access_store_at(T_CHAR, IN_HEAP | IS_ARRAY,
1201 Address(rdx, rbx, Address::times_2,
1202 arrayOopDesc::base_offset_in_bytes(T_CHAR)),
1203 rax, noreg, noreg, noreg);
1204 }
1205
1206
1207 void TemplateTable::sastore() {
1208 castore();
1209 }
1210
1211 void TemplateTable::istore(int n) {
1212 transition(itos, vtos);
1213 __ movl(iaddress(n), rax);
1214 }
1215
1216 void TemplateTable::lstore(int n) {
1217 transition(ltos, vtos);
1218 __ movptr(laddress(n), rax);
1219 NOT_LP64(__ movptr(haddress(n), rdx));
1220 }
1221
1222 void TemplateTable::fstore(int n) {
1223 transition(ftos, vtos);
1224 __ store_float(faddress(n));
1225 }
1226
1227 void TemplateTable::dstore(int n) {
1228 transition(dtos, vtos);
1229 __ store_double(daddress(n));
1230 }
1231
1232
1233 void TemplateTable::astore(int n) {
1234 transition(vtos, vtos);
1235 __ pop_ptr(rax);
1236 __ movptr(aaddress(n), rax);
1237 }
1238
1239 void TemplateTable::pop() {
1240 transition(vtos, vtos);
1241 __ addptr(rsp, Interpreter::stackElementSize);
1242 }
1243
1244 void TemplateTable::pop2() {
1245 transition(vtos, vtos);
1246 __ addptr(rsp, 2 * Interpreter::stackElementSize);
1247 }
1248
1249
1250 void TemplateTable::dup() {
1251 transition(vtos, vtos);
1252 __ load_ptr(0, rax);
1253 __ push_ptr(rax);
1254 // stack: ..., a, a
1255 }
1256
1257 void TemplateTable::dup_x1() {
1258 transition(vtos, vtos);
1259 // stack: ..., a, b
1260 __ load_ptr( 0, rax); // load b
1261 __ load_ptr( 1, rcx); // load a
1262 __ store_ptr(1, rax); // store b
1263 __ store_ptr(0, rcx); // store a
1264 __ push_ptr(rax); // push b
1265 // stack: ..., b, a, b
1266 }
1267
1268 void TemplateTable::dup_x2() {
1269 transition(vtos, vtos);
1270 // stack: ..., a, b, c
1271 __ load_ptr( 0, rax); // load c
1272 __ load_ptr( 2, rcx); // load a
1273 __ store_ptr(2, rax); // store c in a
1274 __ push_ptr(rax); // push c
1275 // stack: ..., c, b, c, c
1276 __ load_ptr( 2, rax); // load b
1277 __ store_ptr(2, rcx); // store a in b
1278 // stack: ..., c, a, c, c
1279 __ store_ptr(1, rax); // store b in c
1280 // stack: ..., c, a, b, c
1281 }
1282
1283 void TemplateTable::dup2() {
1284 transition(vtos, vtos);
1285 // stack: ..., a, b
1286 __ load_ptr(1, rax); // load a
1287 __ push_ptr(rax); // push a
1288 __ load_ptr(1, rax); // load b
1289 __ push_ptr(rax); // push b
1290 // stack: ..., a, b, a, b
1291 }
1292
1293
1294 void TemplateTable::dup2_x1() {
1295 transition(vtos, vtos);
1296 // stack: ..., a, b, c
1297 __ load_ptr( 0, rcx); // load c
1298 __ load_ptr( 1, rax); // load b
1299 __ push_ptr(rax); // push b
1300 __ push_ptr(rcx); // push c
1301 // stack: ..., a, b, c, b, c
1302 __ store_ptr(3, rcx); // store c in b
1303 // stack: ..., a, c, c, b, c
1304 __ load_ptr( 4, rcx); // load a
1305 __ store_ptr(2, rcx); // store a in 2nd c
1306 // stack: ..., a, c, a, b, c
1307 __ store_ptr(4, rax); // store b in a
1308 // stack: ..., b, c, a, b, c
1309 }
1310
1311 void TemplateTable::dup2_x2() {
1312 transition(vtos, vtos);
1313 // stack: ..., a, b, c, d
1314 __ load_ptr( 0, rcx); // load d
1315 __ load_ptr( 1, rax); // load c
1316 __ push_ptr(rax); // push c
1317 __ push_ptr(rcx); // push d
1318 // stack: ..., a, b, c, d, c, d
1319 __ load_ptr( 4, rax); // load b
1320 __ store_ptr(2, rax); // store b in d
1321 __ store_ptr(4, rcx); // store d in b
1322 // stack: ..., a, d, c, b, c, d
1323 __ load_ptr( 5, rcx); // load a
1324 __ load_ptr( 3, rax); // load c
1325 __ store_ptr(3, rcx); // store a in c
1326 __ store_ptr(5, rax); // store c in a
1327 // stack: ..., c, d, a, b, c, d
1328 }
1329
1330 void TemplateTable::swap() {
1331 transition(vtos, vtos);
1332 // stack: ..., a, b
1333 __ load_ptr( 1, rcx); // load a
1334 __ load_ptr( 0, rax); // load b
1335 __ store_ptr(0, rcx); // store a in b
1336 __ store_ptr(1, rax); // store b in a
1337 // stack: ..., b, a
1338 }
1339
1340 void TemplateTable::iop2(Operation op) {
1341 transition(itos, itos);
1342 switch (op) {
1343 case add : __ pop_i(rdx); __ addl (rax, rdx); break;
1344 case sub : __ movl(rdx, rax); __ pop_i(rax); __ subl (rax, rdx); break;
1345 case mul : __ pop_i(rdx); __ imull(rax, rdx); break;
1346 case _and : __ pop_i(rdx); __ andl (rax, rdx); break;
1347 case _or : __ pop_i(rdx); __ orl (rax, rdx); break;
1348 case _xor : __ pop_i(rdx); __ xorl (rax, rdx); break;
1349 case shl : __ movl(rcx, rax); __ pop_i(rax); __ shll (rax); break;
1350 case shr : __ movl(rcx, rax); __ pop_i(rax); __ sarl (rax); break;
1351 case ushr : __ movl(rcx, rax); __ pop_i(rax); __ shrl (rax); break;
1352 default : ShouldNotReachHere();
1353 }
1354 }
1355
1356 void TemplateTable::lop2(Operation op) {
1357 transition(ltos, ltos);
1358 #ifdef _LP64
1359 switch (op) {
1360 case add : __ pop_l(rdx); __ addptr(rax, rdx); break;
1361 case sub : __ mov(rdx, rax); __ pop_l(rax); __ subptr(rax, rdx); break;
1362 case _and : __ pop_l(rdx); __ andptr(rax, rdx); break;
1363 case _or : __ pop_l(rdx); __ orptr (rax, rdx); break;
1364 case _xor : __ pop_l(rdx); __ xorptr(rax, rdx); break;
1365 default : ShouldNotReachHere();
1366 }
1367 #else
1368 __ pop_l(rbx, rcx);
1369 switch (op) {
1370 case add : __ addl(rax, rbx); __ adcl(rdx, rcx); break;
1371 case sub : __ subl(rbx, rax); __ sbbl(rcx, rdx);
1372 __ mov (rax, rbx); __ mov (rdx, rcx); break;
1373 case _and : __ andl(rax, rbx); __ andl(rdx, rcx); break;
1374 case _or : __ orl (rax, rbx); __ orl (rdx, rcx); break;
1375 case _xor : __ xorl(rax, rbx); __ xorl(rdx, rcx); break;
1376 default : ShouldNotReachHere();
1377 }
1378 #endif
1379 }
1380
1381 void TemplateTable::idiv() {
1382 transition(itos, itos);
1383 __ movl(rcx, rax);
1384 __ pop_i(rax);
1385 // Note: could xor rax and ecx and compare with (-1 ^ min_int). If
1386 // they are not equal, one could do a normal division (no correction
1387 // needed), which may speed up this implementation for the common case.
1388 // (see also JVM spec., p.243 & p.271)
1389 __ corrected_idivl(rcx);
1390 }
1391
1392 void TemplateTable::irem() {
1393 transition(itos, itos);
1394 __ movl(rcx, rax);
1395 __ pop_i(rax);
1396 // Note: could xor rax and ecx and compare with (-1 ^ min_int). If
1397 // they are not equal, one could do a normal division (no correction
1398 // needed), which may speed up this implementation for the common case.
1399 // (see also JVM spec., p.243 & p.271)
1400 __ corrected_idivl(rcx);
1401 __ movl(rax, rdx);
1402 }
1403
1404 void TemplateTable::lmul() {
1405 transition(ltos, ltos);
1406 #ifdef _LP64
1407 __ pop_l(rdx);
1408 __ imulq(rax, rdx);
1409 #else
1410 __ pop_l(rbx, rcx);
1411 __ push(rcx); __ push(rbx);
1412 __ push(rdx); __ push(rax);
1413 __ lmul(2 * wordSize, 0);
1414 __ addptr(rsp, 4 * wordSize); // take off temporaries
1415 #endif
1416 }
1417
1418 void TemplateTable::ldiv() {
1419 transition(ltos, ltos);
1420 #ifdef _LP64
1421 __ mov(rcx, rax);
1422 __ pop_l(rax);
1423 // generate explicit div0 check
1424 __ testq(rcx, rcx);
1425 __ jump_cc(Assembler::zero,
1426 ExternalAddress(Interpreter::_throw_ArithmeticException_entry));
1427 // Note: could xor rax and rcx and compare with (-1 ^ min_int). If
1428 // they are not equal, one could do a normal division (no correction
1429 // needed), which may speed up this implementation for the common case.
1430 // (see also JVM spec., p.243 & p.271)
1431 __ corrected_idivq(rcx); // kills rbx
1432 #else
1433 __ pop_l(rbx, rcx);
1434 __ push(rcx); __ push(rbx);
1435 __ push(rdx); __ push(rax);
1436 // check if y = 0
1437 __ orl(rax, rdx);
1438 __ jump_cc(Assembler::zero,
1439 ExternalAddress(Interpreter::_throw_ArithmeticException_entry));
1440 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::ldiv));
1441 __ addptr(rsp, 4 * wordSize); // take off temporaries
1442 #endif
1443 }
1444
1445 void TemplateTable::lrem() {
1446 transition(ltos, ltos);
1447 #ifdef _LP64
1448 __ mov(rcx, rax);
1449 __ pop_l(rax);
1450 __ testq(rcx, rcx);
1451 __ jump_cc(Assembler::zero,
1452 ExternalAddress(Interpreter::_throw_ArithmeticException_entry));
1453 // Note: could xor rax and rcx and compare with (-1 ^ min_int). If
1454 // they are not equal, one could do a normal division (no correction
1455 // needed), which may speed up this implementation for the common case.
1456 // (see also JVM spec., p.243 & p.271)
1457 __ corrected_idivq(rcx); // kills rbx
1458 __ mov(rax, rdx);
1459 #else
1460 __ pop_l(rbx, rcx);
1461 __ push(rcx); __ push(rbx);
1462 __ push(rdx); __ push(rax);
1463 // check if y = 0
1464 __ orl(rax, rdx);
1465 __ jump_cc(Assembler::zero,
1466 ExternalAddress(Interpreter::_throw_ArithmeticException_entry));
1467 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::lrem));
1468 __ addptr(rsp, 4 * wordSize);
1469 #endif
1470 }
1471
1472 void TemplateTable::lshl() {
1473 transition(itos, ltos);
1474 __ movl(rcx, rax); // get shift count
1475 #ifdef _LP64
1476 __ pop_l(rax); // get shift value
1477 __ shlq(rax);
1478 #else
1479 __ pop_l(rax, rdx); // get shift value
1480 __ lshl(rdx, rax);
1481 #endif
1482 }
1483
1484 void TemplateTable::lshr() {
1485 #ifdef _LP64
1486 transition(itos, ltos);
1487 __ movl(rcx, rax); // get shift count
1488 __ pop_l(rax); // get shift value
1489 __ sarq(rax);
1490 #else
1491 transition(itos, ltos);
1492 __ mov(rcx, rax); // get shift count
1493 __ pop_l(rax, rdx); // get shift value
1494 __ lshr(rdx, rax, true);
1495 #endif
1496 }
1497
1498 void TemplateTable::lushr() {
1499 transition(itos, ltos);
1500 #ifdef _LP64
1501 __ movl(rcx, rax); // get shift count
1502 __ pop_l(rax); // get shift value
1503 __ shrq(rax);
1504 #else
1505 __ mov(rcx, rax); // get shift count
1506 __ pop_l(rax, rdx); // get shift value
1507 __ lshr(rdx, rax);
1508 #endif
1509 }
1510
1511 void TemplateTable::fop2(Operation op) {
1512 transition(ftos, ftos);
1513
1514 if (UseSSE >= 1) {
1515 switch (op) {
1516 case add:
1517 __ addss(xmm0, at_rsp());
1518 __ addptr(rsp, Interpreter::stackElementSize);
1519 break;
1520 case sub:
1521 __ movflt(xmm1, xmm0);
1522 __ pop_f(xmm0);
1523 __ subss(xmm0, xmm1);
1524 break;
1525 case mul:
1526 __ mulss(xmm0, at_rsp());
1527 __ addptr(rsp, Interpreter::stackElementSize);
1528 break;
1529 case div:
1530 __ movflt(xmm1, xmm0);
1531 __ pop_f(xmm0);
1532 __ divss(xmm0, xmm1);
1533 break;
1534 case rem:
1535 // On x86_64 platforms the SharedRuntime::frem method is called to perform the
1536 // modulo operation. The frem method calls the function
1537 // double fmod(double x, double y) in math.h. The documentation of fmod states:
1538 // "If x or y is a NaN, a NaN is returned." without specifying what type of NaN
1539 // (signalling or quiet) is returned.
1540 //
1541 // On x86_32 platforms the FPU is used to perform the modulo operation. The
1542 // reason is that on 32-bit Windows the sign of modulo operations diverges from
1543 // what is considered the standard (e.g., -0.0f % -3.14f is 0.0f (and not -0.0f).
1544 // The fprem instruction used on x86_32 is functionally equivalent to
1545 // SharedRuntime::frem in that it returns a NaN.
1546 #ifdef _LP64
1547 __ movflt(xmm1, xmm0);
1548 __ pop_f(xmm0);
1549 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::frem), 2);
1550 #else // !_LP64
1551 __ push_f(xmm0);
1552 __ pop_f();
1553 __ fld_s(at_rsp());
1554 __ fremr(rax);
1555 __ f2ieee();
1556 __ pop(rax); // pop second operand off the stack
1557 __ push_f();
1558 __ pop_f(xmm0);
1559 #endif // _LP64
1560 break;
1561 default:
1562 ShouldNotReachHere();
1563 break;
1564 }
1565 } else {
1566 #ifdef _LP64
1567 ShouldNotReachHere();
1568 #else // !_LP64
1569 switch (op) {
1570 case add: __ fadd_s (at_rsp()); break;
1571 case sub: __ fsubr_s(at_rsp()); break;
1572 case mul: __ fmul_s (at_rsp()); break;
1573 case div: __ fdivr_s(at_rsp()); break;
1574 case rem: __ fld_s (at_rsp()); __ fremr(rax); break;
1575 default : ShouldNotReachHere();
1576 }
1577 __ f2ieee();
1578 __ pop(rax); // pop second operand off the stack
1579 #endif // _LP64
1580 }
1581 }
1582
1583 void TemplateTable::dop2(Operation op) {
1584 transition(dtos, dtos);
1585 if (UseSSE >= 2) {
1586 switch (op) {
1587 case add:
1588 __ addsd(xmm0, at_rsp());
1589 __ addptr(rsp, 2 * Interpreter::stackElementSize);
1590 break;
1591 case sub:
1592 __ movdbl(xmm1, xmm0);
1593 __ pop_d(xmm0);
1594 __ subsd(xmm0, xmm1);
1595 break;
1596 case mul:
1597 __ mulsd(xmm0, at_rsp());
1598 __ addptr(rsp, 2 * Interpreter::stackElementSize);
1599 break;
1600 case div:
1601 __ movdbl(xmm1, xmm0);
1602 __ pop_d(xmm0);
1603 __ divsd(xmm0, xmm1);
1604 break;
1605 case rem:
1606 // Similar to fop2(), the modulo operation is performed using the
1607 // SharedRuntime::drem method (on x86_64 platforms) or using the
1608 // FPU (on x86_32 platforms) for the same reasons as mentioned in fop2().
1609 #ifdef _LP64
1610 __ movdbl(xmm1, xmm0);
1611 __ pop_d(xmm0);
1612 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::drem), 2);
1613 #else // !_LP64
1614 __ push_d(xmm0);
1615 __ pop_d();
1616 __ fld_d(at_rsp());
1617 __ fremr(rax);
1618 __ d2ieee();
1619 __ pop(rax);
1620 __ pop(rdx);
1621 __ push_d();
1622 __ pop_d(xmm0);
1623 #endif // _LP64
1624 break;
1625 default:
1626 ShouldNotReachHere();
1627 break;
1628 }
1629 } else {
1630 #ifdef _LP64
1631 ShouldNotReachHere();
1632 #else // !_LP64
1633 switch (op) {
1634 case add: __ fadd_d (at_rsp()); break;
1635 case sub: __ fsubr_d(at_rsp()); break;
1636 case mul: {
1637 // strict semantics
1638 __ fld_x(ExternalAddress(StubRoutines::x86::addr_fpu_subnormal_bias1()));
1639 __ fmulp();
1640 __ fmul_d (at_rsp());
1641 __ fld_x(ExternalAddress(StubRoutines::x86::addr_fpu_subnormal_bias2()));
1642 __ fmulp();
1643 break;
1644 }
1645 case div: {
1646 // strict semantics
1647 __ fld_x(ExternalAddress(StubRoutines::x86::addr_fpu_subnormal_bias1()));
1648 __ fmul_d (at_rsp());
1649 __ fdivrp();
1650 __ fld_x(ExternalAddress(StubRoutines::x86::addr_fpu_subnormal_bias2()));
1651 __ fmulp();
1652 break;
1653 }
1654 case rem: __ fld_d (at_rsp()); __ fremr(rax); break;
1655 default : ShouldNotReachHere();
1656 }
1657 __ d2ieee();
1658 // Pop double precision number from rsp.
1659 __ pop(rax);
1660 __ pop(rdx);
1661 #endif // _LP64
1662 }
1663 }
1664
1665 void TemplateTable::ineg() {
1666 transition(itos, itos);
1667 __ negl(rax);
1668 }
1669
1670 void TemplateTable::lneg() {
1671 transition(ltos, ltos);
1672 LP64_ONLY(__ negq(rax));
1673 NOT_LP64(__ lneg(rdx, rax));
1674 }
1675
1676 // Note: 'double' and 'long long' have 32-bits alignment on x86.
1677 static jlong* double_quadword(jlong *adr, jlong lo, jlong hi) {
1678 // Use the expression (adr)&(~0xF) to provide 128-bits aligned address
1679 // of 128-bits operands for SSE instructions.
1680 jlong *operand = (jlong*)(((intptr_t)adr)&((intptr_t)(~0xF)));
1681 // Store the value to a 128-bits operand.
1682 operand[0] = lo;
1683 operand[1] = hi;
1684 return operand;
1685 }
1686
1687 // Buffer for 128-bits masks used by SSE instructions.
1688 static jlong float_signflip_pool[2*2];
1689 static jlong double_signflip_pool[2*2];
1690
1691 void TemplateTable::fneg() {
1692 transition(ftos, ftos);
1693 if (UseSSE >= 1) {
1694 static jlong *float_signflip = double_quadword(&float_signflip_pool[1], CONST64(0x8000000080000000), CONST64(0x8000000080000000));
1695 __ xorps(xmm0, ExternalAddress((address) float_signflip), rscratch1);
1696 } else {
1697 LP64_ONLY(ShouldNotReachHere());
1698 NOT_LP64(__ fchs());
1699 }
1700 }
1701
1702 void TemplateTable::dneg() {
1703 transition(dtos, dtos);
1704 if (UseSSE >= 2) {
1705 static jlong *double_signflip =
1706 double_quadword(&double_signflip_pool[1], CONST64(0x8000000000000000), CONST64(0x8000000000000000));
1707 __ xorpd(xmm0, ExternalAddress((address) double_signflip), rscratch1);
1708 } else {
1709 #ifdef _LP64
1710 ShouldNotReachHere();
1711 #else
1712 __ fchs();
1713 #endif
1714 }
1715 }
1716
1717 void TemplateTable::iinc() {
1718 transition(vtos, vtos);
1719 __ load_signed_byte(rdx, at_bcp(2)); // get constant
1720 locals_index(rbx);
1721 __ addl(iaddress(rbx), rdx);
1722 }
1723
1724 void TemplateTable::wide_iinc() {
1725 transition(vtos, vtos);
1726 __ movl(rdx, at_bcp(4)); // get constant
1727 locals_index_wide(rbx);
1728 __ bswapl(rdx); // swap bytes & sign-extend constant
1729 __ sarl(rdx, 16);
1730 __ addl(iaddress(rbx), rdx);
1731 // Note: should probably use only one movl to get both
1732 // the index and the constant -> fix this
1733 }
1734
1735 void TemplateTable::convert() {
1736 #ifdef _LP64
1737 // Checking
1738 #ifdef ASSERT
1739 {
1740 TosState tos_in = ilgl;
1741 TosState tos_out = ilgl;
1742 switch (bytecode()) {
1743 case Bytecodes::_i2l: // fall through
1744 case Bytecodes::_i2f: // fall through
1745 case Bytecodes::_i2d: // fall through
1746 case Bytecodes::_i2b: // fall through
1747 case Bytecodes::_i2c: // fall through
1748 case Bytecodes::_i2s: tos_in = itos; break;
1749 case Bytecodes::_l2i: // fall through
1750 case Bytecodes::_l2f: // fall through
1751 case Bytecodes::_l2d: tos_in = ltos; break;
1752 case Bytecodes::_f2i: // fall through
1753 case Bytecodes::_f2l: // fall through
1754 case Bytecodes::_f2d: tos_in = ftos; break;
1755 case Bytecodes::_d2i: // fall through
1756 case Bytecodes::_d2l: // fall through
1757 case Bytecodes::_d2f: tos_in = dtos; break;
1758 default : ShouldNotReachHere();
1759 }
1760 switch (bytecode()) {
1761 case Bytecodes::_l2i: // fall through
1762 case Bytecodes::_f2i: // fall through
1763 case Bytecodes::_d2i: // fall through
1764 case Bytecodes::_i2b: // fall through
1765 case Bytecodes::_i2c: // fall through
1766 case Bytecodes::_i2s: tos_out = itos; break;
1767 case Bytecodes::_i2l: // fall through
1768 case Bytecodes::_f2l: // fall through
1769 case Bytecodes::_d2l: tos_out = ltos; break;
1770 case Bytecodes::_i2f: // fall through
1771 case Bytecodes::_l2f: // fall through
1772 case Bytecodes::_d2f: tos_out = ftos; break;
1773 case Bytecodes::_i2d: // fall through
1774 case Bytecodes::_l2d: // fall through
1775 case Bytecodes::_f2d: tos_out = dtos; break;
1776 default : ShouldNotReachHere();
1777 }
1778 transition(tos_in, tos_out);
1779 }
1780 #endif // ASSERT
1781
1782 static const int64_t is_nan = 0x8000000000000000L;
1783
1784 // Conversion
1785 switch (bytecode()) {
1786 case Bytecodes::_i2l:
1787 __ movslq(rax, rax);
1788 break;
1789 case Bytecodes::_i2f:
1790 __ cvtsi2ssl(xmm0, rax);
1791 break;
1792 case Bytecodes::_i2d:
1793 __ cvtsi2sdl(xmm0, rax);
1794 break;
1795 case Bytecodes::_i2b:
1796 __ movsbl(rax, rax);
1797 break;
1798 case Bytecodes::_i2c:
1799 __ movzwl(rax, rax);
1800 break;
1801 case Bytecodes::_i2s:
1802 __ movswl(rax, rax);
1803 break;
1804 case Bytecodes::_l2i:
1805 __ movl(rax, rax);
1806 break;
1807 case Bytecodes::_l2f:
1808 __ cvtsi2ssq(xmm0, rax);
1809 break;
1810 case Bytecodes::_l2d:
1811 __ cvtsi2sdq(xmm0, rax);
1812 break;
1813 case Bytecodes::_f2i:
1814 {
1815 Label L;
1816 __ cvttss2sil(rax, xmm0);
1817 __ cmpl(rax, 0x80000000); // NaN or overflow/underflow?
1818 __ jcc(Assembler::notEqual, L);
1819 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2i), 1);
1820 __ bind(L);
1821 }
1822 break;
1823 case Bytecodes::_f2l:
1824 {
1825 Label L;
1826 __ cvttss2siq(rax, xmm0);
1827 // NaN or overflow/underflow?
1828 __ cmp64(rax, ExternalAddress((address) &is_nan), rscratch1);
1829 __ jcc(Assembler::notEqual, L);
1830 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2l), 1);
1831 __ bind(L);
1832 }
1833 break;
1834 case Bytecodes::_f2d:
1835 __ cvtss2sd(xmm0, xmm0);
1836 break;
1837 case Bytecodes::_d2i:
1838 {
1839 Label L;
1840 __ cvttsd2sil(rax, xmm0);
1841 __ cmpl(rax, 0x80000000); // NaN or overflow/underflow?
1842 __ jcc(Assembler::notEqual, L);
1843 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2i), 1);
1844 __ bind(L);
1845 }
1846 break;
1847 case Bytecodes::_d2l:
1848 {
1849 Label L;
1850 __ cvttsd2siq(rax, xmm0);
1851 // NaN or overflow/underflow?
1852 __ cmp64(rax, ExternalAddress((address) &is_nan), rscratch1);
1853 __ jcc(Assembler::notEqual, L);
1854 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2l), 1);
1855 __ bind(L);
1856 }
1857 break;
1858 case Bytecodes::_d2f:
1859 __ cvtsd2ss(xmm0, xmm0);
1860 break;
1861 default:
1862 ShouldNotReachHere();
1863 }
1864 #else // !_LP64
1865 // Checking
1866 #ifdef ASSERT
1867 { TosState tos_in = ilgl;
1868 TosState tos_out = ilgl;
1869 switch (bytecode()) {
1870 case Bytecodes::_i2l: // fall through
1871 case Bytecodes::_i2f: // fall through
1872 case Bytecodes::_i2d: // fall through
1873 case Bytecodes::_i2b: // fall through
1874 case Bytecodes::_i2c: // fall through
1875 case Bytecodes::_i2s: tos_in = itos; break;
1876 case Bytecodes::_l2i: // fall through
1877 case Bytecodes::_l2f: // fall through
1878 case Bytecodes::_l2d: tos_in = ltos; break;
1879 case Bytecodes::_f2i: // fall through
1880 case Bytecodes::_f2l: // fall through
1881 case Bytecodes::_f2d: tos_in = ftos; break;
1882 case Bytecodes::_d2i: // fall through
1883 case Bytecodes::_d2l: // fall through
1884 case Bytecodes::_d2f: tos_in = dtos; break;
1885 default : ShouldNotReachHere();
1886 }
1887 switch (bytecode()) {
1888 case Bytecodes::_l2i: // fall through
1889 case Bytecodes::_f2i: // fall through
1890 case Bytecodes::_d2i: // fall through
1891 case Bytecodes::_i2b: // fall through
1892 case Bytecodes::_i2c: // fall through
1893 case Bytecodes::_i2s: tos_out = itos; break;
1894 case Bytecodes::_i2l: // fall through
1895 case Bytecodes::_f2l: // fall through
1896 case Bytecodes::_d2l: tos_out = ltos; break;
1897 case Bytecodes::_i2f: // fall through
1898 case Bytecodes::_l2f: // fall through
1899 case Bytecodes::_d2f: tos_out = ftos; break;
1900 case Bytecodes::_i2d: // fall through
1901 case Bytecodes::_l2d: // fall through
1902 case Bytecodes::_f2d: tos_out = dtos; break;
1903 default : ShouldNotReachHere();
1904 }
1905 transition(tos_in, tos_out);
1906 }
1907 #endif // ASSERT
1908
1909 // Conversion
1910 // (Note: use push(rcx)/pop(rcx) for 1/2-word stack-ptr manipulation)
1911 switch (bytecode()) {
1912 case Bytecodes::_i2l:
1913 __ extend_sign(rdx, rax);
1914 break;
1915 case Bytecodes::_i2f:
1916 if (UseSSE >= 1) {
1917 __ cvtsi2ssl(xmm0, rax);
1918 } else {
1919 __ push(rax); // store int on tos
1920 __ fild_s(at_rsp()); // load int to ST0
1921 __ f2ieee(); // truncate to float size
1922 __ pop(rcx); // adjust rsp
1923 }
1924 break;
1925 case Bytecodes::_i2d:
1926 if (UseSSE >= 2) {
1927 __ cvtsi2sdl(xmm0, rax);
1928 } else {
1929 __ push(rax); // add one slot for d2ieee()
1930 __ push(rax); // store int on tos
1931 __ fild_s(at_rsp()); // load int to ST0
1932 __ d2ieee(); // truncate to double size
1933 __ pop(rcx); // adjust rsp
1934 __ pop(rcx);
1935 }
1936 break;
1937 case Bytecodes::_i2b:
1938 __ shll(rax, 24); // truncate upper 24 bits
1939 __ sarl(rax, 24); // and sign-extend byte
1940 LP64_ONLY(__ movsbl(rax, rax));
1941 break;
1942 case Bytecodes::_i2c:
1943 __ andl(rax, 0xFFFF); // truncate upper 16 bits
1944 LP64_ONLY(__ movzwl(rax, rax));
1945 break;
1946 case Bytecodes::_i2s:
1947 __ shll(rax, 16); // truncate upper 16 bits
1948 __ sarl(rax, 16); // and sign-extend short
1949 LP64_ONLY(__ movswl(rax, rax));
1950 break;
1951 case Bytecodes::_l2i:
1952 /* nothing to do */
1953 break;
1954 case Bytecodes::_l2f:
1955 // On 64-bit platforms, the cvtsi2ssq instruction is used to convert
1956 // 64-bit long values to floats. On 32-bit platforms it is not possible
1957 // to use that instruction with 64-bit operands, therefore the FPU is
1958 // used to perform the conversion.
1959 __ push(rdx); // store long on tos
1960 __ push(rax);
1961 __ fild_d(at_rsp()); // load long to ST0
1962 __ f2ieee(); // truncate to float size
1963 __ pop(rcx); // adjust rsp
1964 __ pop(rcx);
1965 if (UseSSE >= 1) {
1966 __ push_f();
1967 __ pop_f(xmm0);
1968 }
1969 break;
1970 case Bytecodes::_l2d:
1971 // On 32-bit platforms the FPU is used for conversion because on
1972 // 32-bit platforms it is not not possible to use the cvtsi2sdq
1973 // instruction with 64-bit operands.
1974 __ push(rdx); // store long on tos
1975 __ push(rax);
1976 __ fild_d(at_rsp()); // load long to ST0
1977 __ d2ieee(); // truncate to double size
1978 __ pop(rcx); // adjust rsp
1979 __ pop(rcx);
1980 if (UseSSE >= 2) {
1981 __ push_d();
1982 __ pop_d(xmm0);
1983 }
1984 break;
1985 case Bytecodes::_f2i:
1986 // SharedRuntime::f2i does not differentiate between sNaNs and qNaNs
1987 // as it returns 0 for any NaN.
1988 if (UseSSE >= 1) {
1989 __ push_f(xmm0);
1990 } else {
1991 __ push(rcx); // reserve space for argument
1992 __ fstp_s(at_rsp()); // pass float argument on stack
1993 }
1994 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2i), 1);
1995 break;
1996 case Bytecodes::_f2l:
1997 // SharedRuntime::f2l does not differentiate between sNaNs and qNaNs
1998 // as it returns 0 for any NaN.
1999 if (UseSSE >= 1) {
2000 __ push_f(xmm0);
2001 } else {
2002 __ push(rcx); // reserve space for argument
2003 __ fstp_s(at_rsp()); // pass float argument on stack
2004 }
2005 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2l), 1);
2006 break;
2007 case Bytecodes::_f2d:
2008 if (UseSSE < 1) {
2009 /* nothing to do */
2010 } else if (UseSSE == 1) {
2011 __ push_f(xmm0);
2012 __ pop_f();
2013 } else { // UseSSE >= 2
2014 __ cvtss2sd(xmm0, xmm0);
2015 }
2016 break;
2017 case Bytecodes::_d2i:
2018 if (UseSSE >= 2) {
2019 __ push_d(xmm0);
2020 } else {
2021 __ push(rcx); // reserve space for argument
2022 __ push(rcx);
2023 __ fstp_d(at_rsp()); // pass double argument on stack
2024 }
2025 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2i), 2);
2026 break;
2027 case Bytecodes::_d2l:
2028 if (UseSSE >= 2) {
2029 __ push_d(xmm0);
2030 } else {
2031 __ push(rcx); // reserve space for argument
2032 __ push(rcx);
2033 __ fstp_d(at_rsp()); // pass double argument on stack
2034 }
2035 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2l), 2);
2036 break;
2037 case Bytecodes::_d2f:
2038 if (UseSSE <= 1) {
2039 __ push(rcx); // reserve space for f2ieee()
2040 __ f2ieee(); // truncate to float size
2041 __ pop(rcx); // adjust rsp
2042 if (UseSSE == 1) {
2043 // The cvtsd2ss instruction is not available if UseSSE==1, therefore
2044 // the conversion is performed using the FPU in this case.
2045 __ push_f();
2046 __ pop_f(xmm0);
2047 }
2048 } else { // UseSSE >= 2
2049 __ cvtsd2ss(xmm0, xmm0);
2050 }
2051 break;
2052 default :
2053 ShouldNotReachHere();
2054 }
2055 #endif // _LP64
2056 }
2057
2058 void TemplateTable::lcmp() {
2059 transition(ltos, itos);
2060 #ifdef _LP64
2061 Label done;
2062 __ pop_l(rdx);
2063 __ cmpq(rdx, rax);
2064 __ movl(rax, -1);
2065 __ jccb(Assembler::less, done);
2066 __ setb(Assembler::notEqual, rax);
2067 __ movzbl(rax, rax);
2068 __ bind(done);
2069 #else
2070
2071 // y = rdx:rax
2072 __ pop_l(rbx, rcx); // get x = rcx:rbx
2073 __ lcmp2int(rcx, rbx, rdx, rax);// rcx := cmp(x, y)
2074 __ mov(rax, rcx);
2075 #endif
2076 }
2077
2078 void TemplateTable::float_cmp(bool is_float, int unordered_result) {
2079 if ((is_float && UseSSE >= 1) ||
2080 (!is_float && UseSSE >= 2)) {
2081 Label done;
2082 if (is_float) {
2083 // XXX get rid of pop here, use ... reg, mem32
2084 __ pop_f(xmm1);
2085 __ ucomiss(xmm1, xmm0);
2086 } else {
2087 // XXX get rid of pop here, use ... reg, mem64
2088 __ pop_d(xmm1);
2089 __ ucomisd(xmm1, xmm0);
2090 }
2091 if (unordered_result < 0) {
2092 __ movl(rax, -1);
2093 __ jccb(Assembler::parity, done);
2094 __ jccb(Assembler::below, done);
2095 __ setb(Assembler::notEqual, rdx);
2096 __ movzbl(rax, rdx);
2097 } else {
2098 __ movl(rax, 1);
2099 __ jccb(Assembler::parity, done);
2100 __ jccb(Assembler::above, done);
2101 __ movl(rax, 0);
2102 __ jccb(Assembler::equal, done);
2103 __ decrementl(rax);
2104 }
2105 __ bind(done);
2106 } else {
2107 #ifdef _LP64
2108 ShouldNotReachHere();
2109 #else // !_LP64
2110 if (is_float) {
2111 __ fld_s(at_rsp());
2112 } else {
2113 __ fld_d(at_rsp());
2114 __ pop(rdx);
2115 }
2116 __ pop(rcx);
2117 __ fcmp2int(rax, unordered_result < 0);
2118 #endif // _LP64
2119 }
2120 }
2121
2122 void TemplateTable::branch(bool is_jsr, bool is_wide) {
2123 __ get_method(rcx); // rcx holds method
2124 __ profile_taken_branch(rax, rbx); // rax holds updated MDP, rbx
2125 // holds bumped taken count
2126
2127 const ByteSize be_offset = MethodCounters::backedge_counter_offset() +
2128 InvocationCounter::counter_offset();
2129 const ByteSize inv_offset = MethodCounters::invocation_counter_offset() +
2130 InvocationCounter::counter_offset();
2131
2132 // Load up edx with the branch displacement
2133 if (is_wide) {
2134 __ movl(rdx, at_bcp(1));
2135 } else {
2136 __ load_signed_short(rdx, at_bcp(1));
2137 }
2138 __ bswapl(rdx);
2139
2140 if (!is_wide) {
2141 __ sarl(rdx, 16);
2142 }
2143 LP64_ONLY(__ movl2ptr(rdx, rdx));
2144
2145 // Handle all the JSR stuff here, then exit.
2146 // It's much shorter and cleaner than intermingling with the non-JSR
2147 // normal-branch stuff occurring below.
2148 if (is_jsr) {
2149 // Pre-load the next target bytecode into rbx
2150 __ load_unsigned_byte(rbx, Address(rbcp, rdx, Address::times_1, 0));
2151
2152 // compute return address as bci in rax
2153 __ lea(rax, at_bcp((is_wide ? 5 : 3) -
2154 in_bytes(ConstMethod::codes_offset())));
2155 __ subptr(rax, Address(rcx, Method::const_offset()));
2156 // Adjust the bcp in r13 by the displacement in rdx
2157 __ addptr(rbcp, rdx);
2158 // jsr returns atos that is not an oop
2159 __ push_i(rax);
2160 __ dispatch_only(vtos, true);
2161 return;
2162 }
2163
2164 // Normal (non-jsr) branch handling
2165
2166 // Adjust the bcp in r13 by the displacement in rdx
2167 __ addptr(rbcp, rdx);
2168
2169 assert(UseLoopCounter || !UseOnStackReplacement,
2170 "on-stack-replacement requires loop counters");
2171 Label backedge_counter_overflow;
2172 Label dispatch;
2173 if (UseLoopCounter) {
2174 // increment backedge counter for backward branches
2175 // rax: MDO
2176 // rbx: MDO bumped taken-count
2177 // rcx: method
2178 // rdx: target offset
2179 // r13: target bcp
2180 // r14: locals pointer
2181 __ testl(rdx, rdx); // check if forward or backward branch
2182 __ jcc(Assembler::positive, dispatch); // count only if backward branch
2183
2184 // check if MethodCounters exists
2185 Label has_counters;
2186 __ movptr(rax, Address(rcx, Method::method_counters_offset()));
2187 __ testptr(rax, rax);
2188 __ jcc(Assembler::notZero, has_counters);
2189 __ push(rdx);
2190 __ push(rcx);
2191 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::build_method_counters),
2192 rcx);
2193 __ pop(rcx);
2194 __ pop(rdx);
2195 __ movptr(rax, Address(rcx, Method::method_counters_offset()));
2196 __ testptr(rax, rax);
2197 __ jcc(Assembler::zero, dispatch);
2198 __ bind(has_counters);
2199
2200 Label no_mdo;
2201 if (ProfileInterpreter) {
2202 // Are we profiling?
2203 __ movptr(rbx, Address(rcx, in_bytes(Method::method_data_offset())));
2204 __ testptr(rbx, rbx);
2205 __ jccb(Assembler::zero, no_mdo);
2206 // Increment the MDO backedge counter
2207 const Address mdo_backedge_counter(rbx, in_bytes(MethodData::backedge_counter_offset()) +
2208 in_bytes(InvocationCounter::counter_offset()));
2209 const Address mask(rbx, in_bytes(MethodData::backedge_mask_offset()));
2210 __ increment_mask_and_jump(mdo_backedge_counter, mask, rax,
2211 UseOnStackReplacement ? &backedge_counter_overflow : NULL);
2212 __ jmp(dispatch);
2213 }
2214 __ bind(no_mdo);
2215 // Increment backedge counter in MethodCounters*
2216 __ movptr(rcx, Address(rcx, Method::method_counters_offset()));
2217 const Address mask(rcx, in_bytes(MethodCounters::backedge_mask_offset()));
2218 __ increment_mask_and_jump(Address(rcx, be_offset), mask, rax,
2219 UseOnStackReplacement ? &backedge_counter_overflow : NULL);
2220 __ bind(dispatch);
2221 }
2222
2223 // Pre-load the next target bytecode into rbx
2224 __ load_unsigned_byte(rbx, Address(rbcp, 0));
2225
2226 // continue with the bytecode @ target
2227 // rax: return bci for jsr's, unused otherwise
2228 // rbx: target bytecode
2229 // r13: target bcp
2230 __ dispatch_only(vtos, true);
2231
2232 if (UseLoopCounter) {
2233 if (UseOnStackReplacement) {
2234 Label set_mdp;
2235 // invocation counter overflow
2236 __ bind(backedge_counter_overflow);
2237 __ negptr(rdx);
2238 __ addptr(rdx, rbcp); // branch bcp
2239 // IcoResult frequency_counter_overflow([JavaThread*], address branch_bcp)
2240 __ call_VM(noreg,
2241 CAST_FROM_FN_PTR(address,
2242 InterpreterRuntime::frequency_counter_overflow),
2243 rdx);
2244
2245 // rax: osr nmethod (osr ok) or NULL (osr not possible)
2246 // rdx: scratch
2247 // r14: locals pointer
2248 // r13: bcp
2249 __ testptr(rax, rax); // test result
2250 __ jcc(Assembler::zero, dispatch); // no osr if null
2251 // nmethod may have been invalidated (VM may block upon call_VM return)
2252 __ cmpb(Address(rax, nmethod::state_offset()), nmethod::in_use);
2253 __ jcc(Assembler::notEqual, dispatch);
2254
2255 // We have the address of an on stack replacement routine in rax.
2256 // In preparation of invoking it, first we must migrate the locals
2257 // and monitors from off the interpreter frame on the stack.
2258 // Ensure to save the osr nmethod over the migration call,
2259 // it will be preserved in rbx.
2260 __ mov(rbx, rax);
2261
2262 NOT_LP64(__ get_thread(rcx));
2263
2264 call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_begin));
2265
2266 // rax is OSR buffer, move it to expected parameter location
2267 LP64_ONLY(__ mov(j_rarg0, rax));
2268 NOT_LP64(__ mov(rcx, rax));
2269 // We use j_rarg definitions here so that registers don't conflict as parameter
2270 // registers change across platforms as we are in the midst of a calling
2271 // sequence to the OSR nmethod and we don't want collision. These are NOT parameters.
2272
2273 const Register retaddr = LP64_ONLY(j_rarg2) NOT_LP64(rdi);
2274 const Register sender_sp = LP64_ONLY(j_rarg1) NOT_LP64(rdx);
2275
2276 // pop the interpreter frame
2277 __ movptr(sender_sp, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp
2278 __ leave(); // remove frame anchor
2279 __ pop(retaddr); // get return address
2280 __ mov(rsp, sender_sp); // set sp to sender sp
2281 // Ensure compiled code always sees stack at proper alignment
2282 __ andptr(rsp, -(StackAlignmentInBytes));
2283
2284 // unlike x86 we need no specialized return from compiled code
2285 // to the interpreter or the call stub.
2286
2287 // push the return address
2288 __ push(retaddr);
2289
2290 // and begin the OSR nmethod
2291 __ jmp(Address(rbx, nmethod::osr_entry_point_offset()));
2292 }
2293 }
2294 }
2295
2296 void TemplateTable::if_0cmp(Condition cc) {
2297 transition(itos, vtos);
2298 // assume branch is more often taken than not (loops use backward branches)
2299 Label not_taken;
2300 __ testl(rax, rax);
2301 __ jcc(j_not(cc), not_taken);
2302 branch(false, false);
2303 __ bind(not_taken);
2304 __ profile_not_taken_branch(rax);
2305 }
2306
2307 void TemplateTable::if_icmp(Condition cc) {
2308 transition(itos, vtos);
2309 // assume branch is more often taken than not (loops use backward branches)
2310 Label not_taken;
2311 __ pop_i(rdx);
2312 __ cmpl(rdx, rax);
2313 __ jcc(j_not(cc), not_taken);
2314 branch(false, false);
2315 __ bind(not_taken);
2316 __ profile_not_taken_branch(rax);
2317 }
2318
2319 void TemplateTable::if_nullcmp(Condition cc) {
2320 transition(atos, vtos);
2321 // assume branch is more often taken than not (loops use backward branches)
2322 Label not_taken;
2323 __ testptr(rax, rax);
2324 __ jcc(j_not(cc), not_taken);
2325 branch(false, false);
2326 __ bind(not_taken);
2327 __ profile_not_taken_branch(rax);
2328 }
2329
2330 void TemplateTable::if_acmp(Condition cc) {
2331 transition(atos, vtos);
2332 // assume branch is more often taken than not (loops use backward branches)
2333 Label not_taken;
2334 __ pop_ptr(rdx);
2335 __ cmpoop(rdx, rax);
2336 __ jcc(j_not(cc), not_taken);
2337 branch(false, false);
2338 __ bind(not_taken);
2339 __ profile_not_taken_branch(rax);
2340 }
2341
2342 void TemplateTable::ret() {
2343 transition(vtos, vtos);
2344 locals_index(rbx);
2345 LP64_ONLY(__ movslq(rbx, iaddress(rbx))); // get return bci, compute return bcp
2346 NOT_LP64(__ movptr(rbx, iaddress(rbx)));
2347 __ profile_ret(rbx, rcx);
2348 __ get_method(rax);
2349 __ movptr(rbcp, Address(rax, Method::const_offset()));
2350 __ lea(rbcp, Address(rbcp, rbx, Address::times_1,
2351 ConstMethod::codes_offset()));
2352 __ dispatch_next(vtos, 0, true);
2353 }
2354
2355 void TemplateTable::wide_ret() {
2356 transition(vtos, vtos);
2357 locals_index_wide(rbx);
2358 __ movptr(rbx, aaddress(rbx)); // get return bci, compute return bcp
2359 __ profile_ret(rbx, rcx);
2360 __ get_method(rax);
2361 __ movptr(rbcp, Address(rax, Method::const_offset()));
2362 __ lea(rbcp, Address(rbcp, rbx, Address::times_1, ConstMethod::codes_offset()));
2363 __ dispatch_next(vtos, 0, true);
2364 }
2365
2366 void TemplateTable::tableswitch() {
2367 Label default_case, continue_execution;
2368 transition(itos, vtos);
2369
2370 // align r13/rsi
2371 __ lea(rbx, at_bcp(BytesPerInt));
2372 __ andptr(rbx, -BytesPerInt);
2373 // load lo & hi
2374 __ movl(rcx, Address(rbx, BytesPerInt));
2375 __ movl(rdx, Address(rbx, 2 * BytesPerInt));
2376 __ bswapl(rcx);
2377 __ bswapl(rdx);
2378 // check against lo & hi
2379 __ cmpl(rax, rcx);
2380 __ jcc(Assembler::less, default_case);
2381 __ cmpl(rax, rdx);
2382 __ jcc(Assembler::greater, default_case);
2383 // lookup dispatch offset
2384 __ subl(rax, rcx);
2385 __ movl(rdx, Address(rbx, rax, Address::times_4, 3 * BytesPerInt));
2386 __ profile_switch_case(rax, rbx, rcx);
2387 // continue execution
2388 __ bind(continue_execution);
2389 __ bswapl(rdx);
2390 LP64_ONLY(__ movl2ptr(rdx, rdx));
2391 __ load_unsigned_byte(rbx, Address(rbcp, rdx, Address::times_1));
2392 __ addptr(rbcp, rdx);
2393 __ dispatch_only(vtos, true);
2394 // handle default
2395 __ bind(default_case);
2396 __ profile_switch_default(rax);
2397 __ movl(rdx, Address(rbx, 0));
2398 __ jmp(continue_execution);
2399 }
2400
2401 void TemplateTable::lookupswitch() {
2402 transition(itos, itos);
2403 __ stop("lookupswitch bytecode should have been rewritten");
2404 }
2405
2406 void TemplateTable::fast_linearswitch() {
2407 transition(itos, vtos);
2408 Label loop_entry, loop, found, continue_execution;
2409 // bswap rax so we can avoid bswapping the table entries
2410 __ bswapl(rax);
2411 // align r13
2412 __ lea(rbx, at_bcp(BytesPerInt)); // btw: should be able to get rid of
2413 // this instruction (change offsets
2414 // below)
2415 __ andptr(rbx, -BytesPerInt);
2416 // set counter
2417 __ movl(rcx, Address(rbx, BytesPerInt));
2418 __ bswapl(rcx);
2419 __ jmpb(loop_entry);
2420 // table search
2421 __ bind(loop);
2422 __ cmpl(rax, Address(rbx, rcx, Address::times_8, 2 * BytesPerInt));
2423 __ jcc(Assembler::equal, found);
2424 __ bind(loop_entry);
2425 __ decrementl(rcx);
2426 __ jcc(Assembler::greaterEqual, loop);
2427 // default case
2428 __ profile_switch_default(rax);
2429 __ movl(rdx, Address(rbx, 0));
2430 __ jmp(continue_execution);
2431 // entry found -> get offset
2432 __ bind(found);
2433 __ movl(rdx, Address(rbx, rcx, Address::times_8, 3 * BytesPerInt));
2434 __ profile_switch_case(rcx, rax, rbx);
2435 // continue execution
2436 __ bind(continue_execution);
2437 __ bswapl(rdx);
2438 __ movl2ptr(rdx, rdx);
2439 __ load_unsigned_byte(rbx, Address(rbcp, rdx, Address::times_1));
2440 __ addptr(rbcp, rdx);
2441 __ dispatch_only(vtos, true);
2442 }
2443
2444 void TemplateTable::fast_binaryswitch() {
2445 transition(itos, vtos);
2446 // Implementation using the following core algorithm:
2447 //
2448 // int binary_search(int key, LookupswitchPair* array, int n) {
2449 // // Binary search according to "Methodik des Programmierens" by
2450 // // Edsger W. Dijkstra and W.H.J. Feijen, Addison Wesley Germany 1985.
2451 // int i = 0;
2452 // int j = n;
2453 // while (i+1 < j) {
2454 // // invariant P: 0 <= i < j <= n and (a[i] <= key < a[j] or Q)
2455 // // with Q: for all i: 0 <= i < n: key < a[i]
2456 // // where a stands for the array and assuming that the (inexisting)
2457 // // element a[n] is infinitely big.
2458 // int h = (i + j) >> 1;
2459 // // i < h < j
2460 // if (key < array[h].fast_match()) {
2461 // j = h;
2462 // } else {
2463 // i = h;
2464 // }
2465 // }
2466 // // R: a[i] <= key < a[i+1] or Q
2467 // // (i.e., if key is within array, i is the correct index)
2468 // return i;
2469 // }
2470
2471 // Register allocation
2472 const Register key = rax; // already set (tosca)
2473 const Register array = rbx;
2474 const Register i = rcx;
2475 const Register j = rdx;
2476 const Register h = rdi;
2477 const Register temp = rsi;
2478
2479 // Find array start
2480 NOT_LP64(__ save_bcp());
2481
2482 __ lea(array, at_bcp(3 * BytesPerInt)); // btw: should be able to
2483 // get rid of this
2484 // instruction (change
2485 // offsets below)
2486 __ andptr(array, -BytesPerInt);
2487
2488 // Initialize i & j
2489 __ xorl(i, i); // i = 0;
2490 __ movl(j, Address(array, -BytesPerInt)); // j = length(array);
2491
2492 // Convert j into native byteordering
2493 __ bswapl(j);
2494
2495 // And start
2496 Label entry;
2497 __ jmp(entry);
2498
2499 // binary search loop
2500 {
2501 Label loop;
2502 __ bind(loop);
2503 // int h = (i + j) >> 1;
2504 __ leal(h, Address(i, j, Address::times_1)); // h = i + j;
2505 __ sarl(h, 1); // h = (i + j) >> 1;
2506 // if (key < array[h].fast_match()) {
2507 // j = h;
2508 // } else {
2509 // i = h;
2510 // }
2511 // Convert array[h].match to native byte-ordering before compare
2512 __ movl(temp, Address(array, h, Address::times_8));
2513 __ bswapl(temp);
2514 __ cmpl(key, temp);
2515 // j = h if (key < array[h].fast_match())
2516 __ cmov32(Assembler::less, j, h);
2517 // i = h if (key >= array[h].fast_match())
2518 __ cmov32(Assembler::greaterEqual, i, h);
2519 // while (i+1 < j)
2520 __ bind(entry);
2521 __ leal(h, Address(i, 1)); // i+1
2522 __ cmpl(h, j); // i+1 < j
2523 __ jcc(Assembler::less, loop);
2524 }
2525
2526 // end of binary search, result index is i (must check again!)
2527 Label default_case;
2528 // Convert array[i].match to native byte-ordering before compare
2529 __ movl(temp, Address(array, i, Address::times_8));
2530 __ bswapl(temp);
2531 __ cmpl(key, temp);
2532 __ jcc(Assembler::notEqual, default_case);
2533
2534 // entry found -> j = offset
2535 __ movl(j , Address(array, i, Address::times_8, BytesPerInt));
2536 __ profile_switch_case(i, key, array);
2537 __ bswapl(j);
2538 LP64_ONLY(__ movslq(j, j));
2539
2540 NOT_LP64(__ restore_bcp());
2541 NOT_LP64(__ restore_locals()); // restore rdi
2542
2543 __ load_unsigned_byte(rbx, Address(rbcp, j, Address::times_1));
2544 __ addptr(rbcp, j);
2545 __ dispatch_only(vtos, true);
2546
2547 // default case -> j = default offset
2548 __ bind(default_case);
2549 __ profile_switch_default(i);
2550 __ movl(j, Address(array, -2 * BytesPerInt));
2551 __ bswapl(j);
2552 LP64_ONLY(__ movslq(j, j));
2553
2554 NOT_LP64(__ restore_bcp());
2555 NOT_LP64(__ restore_locals());
2556
2557 __ load_unsigned_byte(rbx, Address(rbcp, j, Address::times_1));
2558 __ addptr(rbcp, j);
2559 __ dispatch_only(vtos, true);
2560 }
2561
2562 void TemplateTable::_return(TosState state) {
2563 transition(state, state);
2564
2565 assert(_desc->calls_vm(),
2566 "inconsistent calls_vm information"); // call in remove_activation
2567
2568 if (_desc->bytecode() == Bytecodes::_return_register_finalizer) {
2569 assert(state == vtos, "only valid state");
2570 Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rax);
2571 __ movptr(robj, aaddress(0));
2572 __ load_klass(rdi, robj, rscratch1);
2573 __ movl(rdi, Address(rdi, Klass::access_flags_offset()));
2574 __ testl(rdi, JVM_ACC_HAS_FINALIZER);
2575 Label skip_register_finalizer;
2576 __ jcc(Assembler::zero, skip_register_finalizer);
2577
2578 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::register_finalizer), robj);
2579
2580 __ bind(skip_register_finalizer);
2581 }
2582
2583 if (_desc->bytecode() != Bytecodes::_return_register_finalizer) {
2584 Label no_safepoint;
2585 NOT_PRODUCT(__ block_comment("Thread-local Safepoint poll"));
2586 #ifdef _LP64
2587 __ testb(Address(r15_thread, JavaThread::polling_word_offset()), SafepointMechanism::poll_bit());
2588 #else
2589 const Register thread = rdi;
2590 __ get_thread(thread);
2591 __ testb(Address(thread, JavaThread::polling_word_offset()), SafepointMechanism::poll_bit());
2592 #endif
2593 __ jcc(Assembler::zero, no_safepoint);
2594 __ push(state);
2595 __ push_cont_fastpath();
2596 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
2597 InterpreterRuntime::at_safepoint));
2598 __ pop_cont_fastpath();
2599 __ pop(state);
2600 __ bind(no_safepoint);
2601 }
2602
2603 // Narrow result if state is itos but result type is smaller.
2604 // Need to narrow in the return bytecode rather than in generate_return_entry
2605 // since compiled code callers expect the result to already be narrowed.
2606 if (state == itos) {
2607 __ narrow(rax);
2608 }
2609 __ remove_activation(state, rbcp);
2610
2611 __ jmp(rbcp);
2612 }
2613
2614 // ----------------------------------------------------------------------------
2615 // Volatile variables demand their effects be made known to all CPU's
2616 // in order. Store buffers on most chips allow reads & writes to
2617 // reorder; the JMM's ReadAfterWrite.java test fails in -Xint mode
2618 // without some kind of memory barrier (i.e., it's not sufficient that
2619 // the interpreter does not reorder volatile references, the hardware
2620 // also must not reorder them).
2621 //
2622 // According to the new Java Memory Model (JMM):
2623 // (1) All volatiles are serialized wrt to each other. ALSO reads &
2624 // writes act as acquire & release, so:
2625 // (2) A read cannot let unrelated NON-volatile memory refs that
2626 // happen after the read float up to before the read. It's OK for
2627 // non-volatile memory refs that happen before the volatile read to
2628 // float down below it.
2629 // (3) Similar a volatile write cannot let unrelated NON-volatile
2630 // memory refs that happen BEFORE the write float down to after the
2631 // write. It's OK for non-volatile memory refs that happen after the
2632 // volatile write to float up before it.
2633 //
2634 // We only put in barriers around volatile refs (they are expensive),
2635 // not _between_ memory refs (that would require us to track the
2636 // flavor of the previous memory refs). Requirements (2) and (3)
2637 // require some barriers before volatile stores and after volatile
2638 // loads. These nearly cover requirement (1) but miss the
2639 // volatile-store-volatile-load case. This final case is placed after
2640 // volatile-stores although it could just as well go before
2641 // volatile-loads.
2642
2643 void TemplateTable::volatile_barrier(Assembler::Membar_mask_bits order_constraint ) {
2644 // Helper function to insert a is-volatile test and memory barrier
2645 __ membar(order_constraint);
2646 }
2647
2648 void TemplateTable::resolve_cache_and_index(int byte_no,
2649 Register cache,
2650 Register index,
2651 size_t index_size) {
2652 const Register temp = rbx;
2653 assert_different_registers(cache, index, temp);
2654
2655 Label L_clinit_barrier_slow;
2656 Label resolved;
2657
2658 Bytecodes::Code code = bytecode();
2659 switch (code) {
2660 case Bytecodes::_nofast_getfield: code = Bytecodes::_getfield; break;
2661 case Bytecodes::_nofast_putfield: code = Bytecodes::_putfield; break;
2662 default: break;
2663 }
2664
2665 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");
2666 __ get_cache_and_index_and_bytecode_at_bcp(cache, index, temp, byte_no, 1, index_size);
2667 __ cmpl(temp, code); // have we resolved this bytecode?
2668 __ jcc(Assembler::equal, resolved);
2669
2670 // resolve first time through
2671 // Class initialization barrier slow path lands here as well.
2672 __ bind(L_clinit_barrier_slow);
2673 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_from_cache);
2674 __ movl(temp, code);
2675 __ call_VM(noreg, entry, temp);
2676 // Update registers with resolved info
2677 __ get_cache_and_index_at_bcp(cache, index, 1, index_size);
2678
2679 __ bind(resolved);
2680
2681 // Class initialization barrier for static methods
2682 if (VM_Version::supports_fast_class_init_checks() && bytecode() == Bytecodes::_invokestatic) {
2683 const Register method = temp;
2684 const Register klass = temp;
2685 const Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg);
2686 assert(thread != noreg, "x86_32 not supported");
2687
2688 __ load_resolved_method_at_index(byte_no, method, cache, index);
2689 __ load_method_holder(klass, method);
2690 __ clinit_barrier(klass, thread, NULL /*L_fast_path*/, &L_clinit_barrier_slow);
2691 }
2692 }
2693
2694 // The cache and index registers must be set before call
2695 void TemplateTable::load_field_cp_cache_entry(Register obj,
2696 Register cache,
2697 Register index,
2698 Register off,
2699 Register flags,
2700 bool is_static = false) {
2701 assert_different_registers(cache, index, flags, off);
2702
2703 ByteSize cp_base_offset = ConstantPoolCache::base_offset();
2704 // Field offset
2705 __ movptr(off, Address(cache, index, Address::times_ptr,
2706 in_bytes(cp_base_offset +
2707 ConstantPoolCacheEntry::f2_offset())));
2708 // Flags
2709 __ movl(flags, Address(cache, index, Address::times_ptr,
2710 in_bytes(cp_base_offset +
2711 ConstantPoolCacheEntry::flags_offset())));
2712
2713 // klass overwrite register
2714 if (is_static) {
2715 __ movptr(obj, Address(cache, index, Address::times_ptr,
2716 in_bytes(cp_base_offset +
2717 ConstantPoolCacheEntry::f1_offset())));
2718 const int mirror_offset = in_bytes(Klass::java_mirror_offset());
2719 __ movptr(obj, Address(obj, mirror_offset));
2720 __ resolve_oop_handle(obj, rscratch2);
2721 }
2722 }
2723
2724 void TemplateTable::load_invoke_cp_cache_entry(int byte_no,
2725 Register method,
2726 Register itable_index,
2727 Register flags,
2728 bool is_invokevirtual,
2729 bool is_invokevfinal, /*unused*/
2730 bool is_invokedynamic) {
2731 // setup registers
2732 const Register cache = rcx;
2733 const Register index = rdx;
2734 assert_different_registers(method, flags);
2735 assert_different_registers(method, cache, index);
2736 assert_different_registers(itable_index, flags);
2737 assert_different_registers(itable_index, cache, index);
2738 // determine constant pool cache field offsets
2739 assert(is_invokevirtual == (byte_no == f2_byte), "is_invokevirtual flag redundant");
2740 const int flags_offset = in_bytes(ConstantPoolCache::base_offset() +
2741 ConstantPoolCacheEntry::flags_offset());
2742 // access constant pool cache fields
2743 const int index_offset = in_bytes(ConstantPoolCache::base_offset() +
2744 ConstantPoolCacheEntry::f2_offset());
2745
2746 size_t index_size = (is_invokedynamic ? sizeof(u4) : sizeof(u2));
2747 resolve_cache_and_index(byte_no, cache, index, index_size);
2748 __ load_resolved_method_at_index(byte_no, method, cache, index);
2749
2750 if (itable_index != noreg) {
2751 // pick up itable or appendix index from f2 also:
2752 __ movptr(itable_index, Address(cache, index, Address::times_ptr, index_offset));
2753 }
2754 __ movl(flags, Address(cache, index, Address::times_ptr, flags_offset));
2755 }
2756
2757 // The registers cache and index expected to be set before call.
2758 // Correct values of the cache and index registers are preserved.
2759 void TemplateTable::jvmti_post_field_access(Register cache,
2760 Register index,
2761 bool is_static,
2762 bool has_tos) {
2763 if (JvmtiExport::can_post_field_access()) {
2764 // Check to see if a field access watch has been set before we take
2765 // the time to call into the VM.
2766 Label L1;
2767 assert_different_registers(cache, index, rax);
2768 __ mov32(rax, ExternalAddress((address) JvmtiExport::get_field_access_count_addr()));
2769 __ testl(rax,rax);
2770 __ jcc(Assembler::zero, L1);
2771
2772 // cache entry pointer
2773 __ addptr(cache, in_bytes(ConstantPoolCache::base_offset()));
2774 __ shll(index, LogBytesPerWord);
2775 __ addptr(cache, index);
2776 if (is_static) {
2777 __ xorptr(rax, rax); // NULL object reference
2778 } else {
2779 __ pop(atos); // Get the object
2780 __ verify_oop(rax);
2781 __ push(atos); // Restore stack state
2782 }
2783 // rax,: object pointer or NULL
2784 // cache: cache entry pointer
2785 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access),
2786 rax, cache);
2787 __ get_cache_and_index_at_bcp(cache, index, 1);
2788 __ bind(L1);
2789 }
2790 }
2791
2792 void TemplateTable::pop_and_check_object(Register r) {
2793 __ pop_ptr(r);
2794 __ null_check(r); // for field access must check obj.
2795 __ verify_oop(r);
2796 }
2797
2798 void TemplateTable::getfield_or_static(int byte_no, bool is_static, RewriteControl rc) {
2799 transition(vtos, vtos);
2800
2801 const Register cache = rcx;
2802 const Register index = rdx;
2803 const Register obj = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
2804 const Register off = rbx;
2805 const Register flags = rax;
2806 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // uses same reg as obj, so don't mix them
2807
2808 resolve_cache_and_index(byte_no, cache, index, sizeof(u2));
2809 jvmti_post_field_access(cache, index, is_static, false);
2810 load_field_cp_cache_entry(obj, cache, index, off, flags, is_static);
2811
2812 if (!is_static) pop_and_check_object(obj);
2813
2814 const Address field(obj, off, Address::times_1, 0*wordSize);
2815
2816 Label Done, notByte, notBool, notInt, notShort, notChar, notLong, notFloat, notObj;
2817
2818 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift);
2819 // Make sure we don't need to mask edx after the above shift
2820 assert(btos == 0, "change code, btos != 0");
2821
2822 __ andl(flags, ConstantPoolCacheEntry::tos_state_mask);
2823
2824 __ jcc(Assembler::notZero, notByte);
2825 // btos
2826 __ access_load_at(T_BYTE, IN_HEAP, rax, field, noreg, noreg);
2827 __ push(btos);
2828 // Rewrite bytecode to be faster
2829 if (!is_static && rc == may_rewrite) {
2830 patch_bytecode(Bytecodes::_fast_bgetfield, bc, rbx);
2831 }
2832 __ jmp(Done);
2833
2834 __ bind(notByte);
2835 __ cmpl(flags, ztos);
2836 __ jcc(Assembler::notEqual, notBool);
2837
2838 // ztos (same code as btos)
2839 __ access_load_at(T_BOOLEAN, IN_HEAP, rax, field, noreg, noreg);
2840 __ push(ztos);
2841 // Rewrite bytecode to be faster
2842 if (!is_static && rc == may_rewrite) {
2843 // use btos rewriting, no truncating to t/f bit is needed for getfield.
2844 patch_bytecode(Bytecodes::_fast_bgetfield, bc, rbx);
2845 }
2846 __ jmp(Done);
2847
2848 __ bind(notBool);
2849 __ cmpl(flags, atos);
2850 __ jcc(Assembler::notEqual, notObj);
2851 // atos
2852 do_oop_load(_masm, field, rax);
2853 __ push(atos);
2854 if (!is_static && rc == may_rewrite) {
2855 patch_bytecode(Bytecodes::_fast_agetfield, bc, rbx);
2856 }
2857 __ jmp(Done);
2858
2859 __ bind(notObj);
2860 __ cmpl(flags, itos);
2861 __ jcc(Assembler::notEqual, notInt);
2862 // itos
2863 __ access_load_at(T_INT, IN_HEAP, rax, field, noreg, noreg);
2864 __ push(itos);
2865 // Rewrite bytecode to be faster
2866 if (!is_static && rc == may_rewrite) {
2867 patch_bytecode(Bytecodes::_fast_igetfield, bc, rbx);
2868 }
2869 __ jmp(Done);
2870
2871 __ bind(notInt);
2872 __ cmpl(flags, ctos);
2873 __ jcc(Assembler::notEqual, notChar);
2874 // ctos
2875 __ access_load_at(T_CHAR, IN_HEAP, rax, field, noreg, noreg);
2876 __ push(ctos);
2877 // Rewrite bytecode to be faster
2878 if (!is_static && rc == may_rewrite) {
2879 patch_bytecode(Bytecodes::_fast_cgetfield, bc, rbx);
2880 }
2881 __ jmp(Done);
2882
2883 __ bind(notChar);
2884 __ cmpl(flags, stos);
2885 __ jcc(Assembler::notEqual, notShort);
2886 // stos
2887 __ access_load_at(T_SHORT, IN_HEAP, rax, field, noreg, noreg);
2888 __ push(stos);
2889 // Rewrite bytecode to be faster
2890 if (!is_static && rc == may_rewrite) {
2891 patch_bytecode(Bytecodes::_fast_sgetfield, bc, rbx);
2892 }
2893 __ jmp(Done);
2894
2895 __ bind(notShort);
2896 __ cmpl(flags, ltos);
2897 __ jcc(Assembler::notEqual, notLong);
2898 // ltos
2899 // Generate code as if volatile (x86_32). There just aren't enough registers to
2900 // save that information and this code is faster than the test.
2901 __ access_load_at(T_LONG, IN_HEAP | MO_RELAXED, noreg /* ltos */, field, noreg, noreg);
2902 __ push(ltos);
2903 // Rewrite bytecode to be faster
2904 LP64_ONLY(if (!is_static && rc == may_rewrite) patch_bytecode(Bytecodes::_fast_lgetfield, bc, rbx));
2905 __ jmp(Done);
2906
2907 __ bind(notLong);
2908 __ cmpl(flags, ftos);
2909 __ jcc(Assembler::notEqual, notFloat);
2910 // ftos
2911
2912 __ access_load_at(T_FLOAT, IN_HEAP, noreg /* ftos */, field, noreg, noreg);
2913 __ push(ftos);
2914 // Rewrite bytecode to be faster
2915 if (!is_static && rc == may_rewrite) {
2916 patch_bytecode(Bytecodes::_fast_fgetfield, bc, rbx);
2917 }
2918 __ jmp(Done);
2919
2920 __ bind(notFloat);
2921 #ifdef ASSERT
2922 Label notDouble;
2923 __ cmpl(flags, dtos);
2924 __ jcc(Assembler::notEqual, notDouble);
2925 #endif
2926 // dtos
2927 // MO_RELAXED: for the case of volatile field, in fact it adds no extra work for the underlying implementation
2928 __ access_load_at(T_DOUBLE, IN_HEAP | MO_RELAXED, noreg /* dtos */, field, noreg, noreg);
2929 __ push(dtos);
2930 // Rewrite bytecode to be faster
2931 if (!is_static && rc == may_rewrite) {
2932 patch_bytecode(Bytecodes::_fast_dgetfield, bc, rbx);
2933 }
2934 #ifdef ASSERT
2935 __ jmp(Done);
2936
2937 __ bind(notDouble);
2938 __ stop("Bad state");
2939 #endif
2940
2941 __ bind(Done);
2942 // [jk] not needed currently
2943 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadLoad |
2944 // Assembler::LoadStore));
2945 }
2946
2947 void TemplateTable::getfield(int byte_no) {
2948 getfield_or_static(byte_no, false);
2949 }
2950
2951 void TemplateTable::nofast_getfield(int byte_no) {
2952 getfield_or_static(byte_no, false, may_not_rewrite);
2953 }
2954
2955 void TemplateTable::getstatic(int byte_no) {
2956 getfield_or_static(byte_no, true);
2957 }
2958
2959
2960 // The registers cache and index expected to be set before call.
2961 // The function may destroy various registers, just not the cache and index registers.
2962 void TemplateTable::jvmti_post_field_mod(Register cache, Register index, bool is_static) {
2963
2964 const Register robj = LP64_ONLY(c_rarg2) NOT_LP64(rax);
2965 const Register RBX = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
2966 const Register RCX = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
2967 const Register RDX = LP64_ONLY(rscratch1) NOT_LP64(rdx);
2968
2969 ByteSize cp_base_offset = ConstantPoolCache::base_offset();
2970
2971 if (JvmtiExport::can_post_field_modification()) {
2972 // Check to see if a field modification watch has been set before
2973 // we take the time to call into the VM.
2974 Label L1;
2975 assert_different_registers(cache, index, rax);
2976 __ mov32(rax, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr()));
2977 __ testl(rax, rax);
2978 __ jcc(Assembler::zero, L1);
2979
2980 __ get_cache_and_index_at_bcp(robj, RDX, 1);
2981
2982
2983 if (is_static) {
2984 // Life is simple. Null out the object pointer.
2985 __ xorl(RBX, RBX);
2986
2987 } else {
2988 // Life is harder. The stack holds the value on top, followed by
2989 // the object. We don't know the size of the value, though; it
2990 // could be one or two words depending on its type. As a result,
2991 // we must find the type to determine where the object is.
2992 #ifndef _LP64
2993 Label two_word, valsize_known;
2994 #endif
2995 __ movl(RCX, Address(robj, RDX,
2996 Address::times_ptr,
2997 in_bytes(cp_base_offset +
2998 ConstantPoolCacheEntry::flags_offset())));
2999 NOT_LP64(__ mov(rbx, rsp));
3000 __ shrl(RCX, ConstantPoolCacheEntry::tos_state_shift);
3001
3002 // Make sure we don't need to mask rcx after the above shift
3003 ConstantPoolCacheEntry::verify_tos_state_shift();
3004 #ifdef _LP64
3005 __ movptr(c_rarg1, at_tos_p1()); // initially assume a one word jvalue
3006 __ cmpl(c_rarg3, ltos);
3007 __ cmovptr(Assembler::equal,
3008 c_rarg1, at_tos_p2()); // ltos (two word jvalue)
3009 __ cmpl(c_rarg3, dtos);
3010 __ cmovptr(Assembler::equal,
3011 c_rarg1, at_tos_p2()); // dtos (two word jvalue)
3012 #else
3013 __ cmpl(rcx, ltos);
3014 __ jccb(Assembler::equal, two_word);
3015 __ cmpl(rcx, dtos);
3016 __ jccb(Assembler::equal, two_word);
3017 __ addptr(rbx, Interpreter::expr_offset_in_bytes(1)); // one word jvalue (not ltos, dtos)
3018 __ jmpb(valsize_known);
3019
3020 __ bind(two_word);
3021 __ addptr(rbx, Interpreter::expr_offset_in_bytes(2)); // two words jvalue
3022
3023 __ bind(valsize_known);
3024 // setup object pointer
3025 __ movptr(rbx, Address(rbx, 0));
3026 #endif
3027 }
3028 // cache entry pointer
3029 __ addptr(robj, in_bytes(cp_base_offset));
3030 __ shll(RDX, LogBytesPerWord);
3031 __ addptr(robj, RDX);
3032 // object (tos)
3033 __ mov(RCX, rsp);
3034 // c_rarg1: object pointer set up above (NULL if static)
3035 // c_rarg2: cache entry pointer
3036 // c_rarg3: jvalue object on the stack
3037 __ call_VM(noreg,
3038 CAST_FROM_FN_PTR(address,
3039 InterpreterRuntime::post_field_modification),
3040 RBX, robj, RCX);
3041 __ get_cache_and_index_at_bcp(cache, index, 1);
3042 __ bind(L1);
3043 }
3044 }
3045
3046 void TemplateTable::putfield_or_static(int byte_no, bool is_static, RewriteControl rc) {
3047 transition(vtos, vtos);
3048
3049 const Register cache = rcx;
3050 const Register index = rdx;
3051 const Register obj = rcx;
3052 const Register off = rbx;
3053 const Register flags = rax;
3054
3055 resolve_cache_and_index(byte_no, cache, index, sizeof(u2));
3056 jvmti_post_field_mod(cache, index, is_static);
3057 load_field_cp_cache_entry(obj, cache, index, off, flags, is_static);
3058
3059 // [jk] not needed currently
3060 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadStore |
3061 // Assembler::StoreStore));
3062
3063 Label notVolatile, Done;
3064 __ movl(rdx, flags);
3065 __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift);
3066 __ andl(rdx, 0x1);
3067
3068 // Check for volatile store
3069 __ testl(rdx, rdx);
3070 __ jcc(Assembler::zero, notVolatile);
3071
3072 putfield_or_static_helper(byte_no, is_static, rc, obj, off, flags);
3073 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad |
3074 Assembler::StoreStore));
3075 __ jmp(Done);
3076 __ bind(notVolatile);
3077
3078 putfield_or_static_helper(byte_no, is_static, rc, obj, off, flags);
3079
3080 __ bind(Done);
3081 }
3082
3083 void TemplateTable::putfield_or_static_helper(int byte_no, bool is_static, RewriteControl rc,
3084 Register obj, Register off, Register flags) {
3085
3086 // field addresses
3087 const Address field(obj, off, Address::times_1, 0*wordSize);
3088 NOT_LP64( const Address hi(obj, off, Address::times_1, 1*wordSize);)
3089
3090 Label notByte, notBool, notInt, notShort, notChar,
3091 notLong, notFloat, notObj;
3092 Label Done;
3093
3094 const Register bc = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
3095
3096 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift);
3097
3098 assert(btos == 0, "change code, btos != 0");
3099 __ andl(flags, ConstantPoolCacheEntry::tos_state_mask);
3100 __ jcc(Assembler::notZero, notByte);
3101
3102 // btos
3103 {
3104 __ pop(btos);
3105 if (!is_static) pop_and_check_object(obj);
3106 __ access_store_at(T_BYTE, IN_HEAP, field, rax, noreg, noreg, noreg);
3107 if (!is_static && rc == may_rewrite) {
3108 patch_bytecode(Bytecodes::_fast_bputfield, bc, rbx, true, byte_no);
3109 }
3110 __ jmp(Done);
3111 }
3112
3113 __ bind(notByte);
3114 __ cmpl(flags, ztos);
3115 __ jcc(Assembler::notEqual, notBool);
3116
3117 // ztos
3118 {
3119 __ pop(ztos);
3120 if (!is_static) pop_and_check_object(obj);
3121 __ access_store_at(T_BOOLEAN, IN_HEAP, field, rax, noreg, noreg, noreg);
3122 if (!is_static && rc == may_rewrite) {
3123 patch_bytecode(Bytecodes::_fast_zputfield, bc, rbx, true, byte_no);
3124 }
3125 __ jmp(Done);
3126 }
3127
3128 __ bind(notBool);
3129 __ cmpl(flags, atos);
3130 __ jcc(Assembler::notEqual, notObj);
3131
3132 // atos
3133 {
3134 __ pop(atos);
3135 if (!is_static) pop_and_check_object(obj);
3136 // Store into the field
3137 do_oop_store(_masm, field, rax);
3138 if (!is_static && rc == may_rewrite) {
3139 patch_bytecode(Bytecodes::_fast_aputfield, bc, rbx, true, byte_no);
3140 }
3141 __ jmp(Done);
3142 }
3143
3144 __ bind(notObj);
3145 __ cmpl(flags, itos);
3146 __ jcc(Assembler::notEqual, notInt);
3147
3148 // itos
3149 {
3150 __ pop(itos);
3151 if (!is_static) pop_and_check_object(obj);
3152 __ access_store_at(T_INT, IN_HEAP, field, rax, noreg, noreg, noreg);
3153 if (!is_static && rc == may_rewrite) {
3154 patch_bytecode(Bytecodes::_fast_iputfield, bc, rbx, true, byte_no);
3155 }
3156 __ jmp(Done);
3157 }
3158
3159 __ bind(notInt);
3160 __ cmpl(flags, ctos);
3161 __ jcc(Assembler::notEqual, notChar);
3162
3163 // ctos
3164 {
3165 __ pop(ctos);
3166 if (!is_static) pop_and_check_object(obj);
3167 __ access_store_at(T_CHAR, IN_HEAP, field, rax, noreg, noreg, noreg);
3168 if (!is_static && rc == may_rewrite) {
3169 patch_bytecode(Bytecodes::_fast_cputfield, bc, rbx, true, byte_no);
3170 }
3171 __ jmp(Done);
3172 }
3173
3174 __ bind(notChar);
3175 __ cmpl(flags, stos);
3176 __ jcc(Assembler::notEqual, notShort);
3177
3178 // stos
3179 {
3180 __ pop(stos);
3181 if (!is_static) pop_and_check_object(obj);
3182 __ access_store_at(T_SHORT, IN_HEAP, field, rax, noreg, noreg, noreg);
3183 if (!is_static && rc == may_rewrite) {
3184 patch_bytecode(Bytecodes::_fast_sputfield, bc, rbx, true, byte_no);
3185 }
3186 __ jmp(Done);
3187 }
3188
3189 __ bind(notShort);
3190 __ cmpl(flags, ltos);
3191 __ jcc(Assembler::notEqual, notLong);
3192
3193 // ltos
3194 {
3195 __ pop(ltos);
3196 if (!is_static) pop_and_check_object(obj);
3197 // MO_RELAXED: generate atomic store for the case of volatile field (important for x86_32)
3198 __ access_store_at(T_LONG, IN_HEAP | MO_RELAXED, field, noreg /* ltos*/, noreg, noreg, noreg);
3199 #ifdef _LP64
3200 if (!is_static && rc == may_rewrite) {
3201 patch_bytecode(Bytecodes::_fast_lputfield, bc, rbx, true, byte_no);
3202 }
3203 #endif // _LP64
3204 __ jmp(Done);
3205 }
3206
3207 __ bind(notLong);
3208 __ cmpl(flags, ftos);
3209 __ jcc(Assembler::notEqual, notFloat);
3210
3211 // ftos
3212 {
3213 __ pop(ftos);
3214 if (!is_static) pop_and_check_object(obj);
3215 __ access_store_at(T_FLOAT, IN_HEAP, field, noreg /* ftos */, noreg, noreg, noreg);
3216 if (!is_static && rc == may_rewrite) {
3217 patch_bytecode(Bytecodes::_fast_fputfield, bc, rbx, true, byte_no);
3218 }
3219 __ jmp(Done);
3220 }
3221
3222 __ bind(notFloat);
3223 #ifdef ASSERT
3224 Label notDouble;
3225 __ cmpl(flags, dtos);
3226 __ jcc(Assembler::notEqual, notDouble);
3227 #endif
3228
3229 // dtos
3230 {
3231 __ pop(dtos);
3232 if (!is_static) pop_and_check_object(obj);
3233 // MO_RELAXED: for the case of volatile field, in fact it adds no extra work for the underlying implementation
3234 __ access_store_at(T_DOUBLE, IN_HEAP | MO_RELAXED, field, noreg /* dtos */, noreg, noreg, noreg);
3235 if (!is_static && rc == may_rewrite) {
3236 patch_bytecode(Bytecodes::_fast_dputfield, bc, rbx, true, byte_no);
3237 }
3238 }
3239
3240 #ifdef ASSERT
3241 __ jmp(Done);
3242
3243 __ bind(notDouble);
3244 __ stop("Bad state");
3245 #endif
3246
3247 __ bind(Done);
3248 }
3249
3250 void TemplateTable::putfield(int byte_no) {
3251 putfield_or_static(byte_no, false);
3252 }
3253
3254 void TemplateTable::nofast_putfield(int byte_no) {
3255 putfield_or_static(byte_no, false, may_not_rewrite);
3256 }
3257
3258 void TemplateTable::putstatic(int byte_no) {
3259 putfield_or_static(byte_no, true);
3260 }
3261
3262 void TemplateTable::jvmti_post_fast_field_mod() {
3263
3264 const Register scratch = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
3265
3266 if (JvmtiExport::can_post_field_modification()) {
3267 // Check to see if a field modification watch has been set before
3268 // we take the time to call into the VM.
3269 Label L2;
3270 __ mov32(scratch, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr()));
3271 __ testl(scratch, scratch);
3272 __ jcc(Assembler::zero, L2);
3273 __ pop_ptr(rbx); // copy the object pointer from tos
3274 __ verify_oop(rbx);
3275 __ push_ptr(rbx); // put the object pointer back on tos
3276 // Save tos values before call_VM() clobbers them. Since we have
3277 // to do it for every data type, we use the saved values as the
3278 // jvalue object.
3279 switch (bytecode()) { // load values into the jvalue object
3280 case Bytecodes::_fast_aputfield: __ push_ptr(rax); break;
3281 case Bytecodes::_fast_bputfield: // fall through
3282 case Bytecodes::_fast_zputfield: // fall through
3283 case Bytecodes::_fast_sputfield: // fall through
3284 case Bytecodes::_fast_cputfield: // fall through
3285 case Bytecodes::_fast_iputfield: __ push_i(rax); break;
3286 case Bytecodes::_fast_dputfield: __ push(dtos); break;
3287 case Bytecodes::_fast_fputfield: __ push(ftos); break;
3288 case Bytecodes::_fast_lputfield: __ push_l(rax); break;
3289
3290 default:
3291 ShouldNotReachHere();
3292 }
3293 __ mov(scratch, rsp); // points to jvalue on the stack
3294 // access constant pool cache entry
3295 LP64_ONLY(__ get_cache_entry_pointer_at_bcp(c_rarg2, rax, 1));
3296 NOT_LP64(__ get_cache_entry_pointer_at_bcp(rax, rdx, 1));
3297 __ verify_oop(rbx);
3298 // rbx: object pointer copied above
3299 // c_rarg2: cache entry pointer
3300 // c_rarg3: jvalue object on the stack
3301 LP64_ONLY(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification), rbx, c_rarg2, c_rarg3));
3302 NOT_LP64(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification), rbx, rax, rcx));
3303
3304 switch (bytecode()) { // restore tos values
3305 case Bytecodes::_fast_aputfield: __ pop_ptr(rax); break;
3306 case Bytecodes::_fast_bputfield: // fall through
3307 case Bytecodes::_fast_zputfield: // fall through
3308 case Bytecodes::_fast_sputfield: // fall through
3309 case Bytecodes::_fast_cputfield: // fall through
3310 case Bytecodes::_fast_iputfield: __ pop_i(rax); break;
3311 case Bytecodes::_fast_dputfield: __ pop(dtos); break;
3312 case Bytecodes::_fast_fputfield: __ pop(ftos); break;
3313 case Bytecodes::_fast_lputfield: __ pop_l(rax); break;
3314 default: break;
3315 }
3316 __ bind(L2);
3317 }
3318 }
3319
3320 void TemplateTable::fast_storefield(TosState state) {
3321 transition(state, vtos);
3322
3323 ByteSize base = ConstantPoolCache::base_offset();
3324
3325 jvmti_post_fast_field_mod();
3326
3327 // access constant pool cache
3328 __ get_cache_and_index_at_bcp(rcx, rbx, 1);
3329
3330 // test for volatile with rdx but rdx is tos register for lputfield.
3331 __ movl(rdx, Address(rcx, rbx, Address::times_ptr,
3332 in_bytes(base +
3333 ConstantPoolCacheEntry::flags_offset())));
3334
3335 // replace index with field offset from cache entry
3336 __ movptr(rbx, Address(rcx, rbx, Address::times_ptr,
3337 in_bytes(base + ConstantPoolCacheEntry::f2_offset())));
3338
3339 // [jk] not needed currently
3340 // volatile_barrier(Assembler::Membar_mask_bits(Assembler::LoadStore |
3341 // Assembler::StoreStore));
3342
3343 Label notVolatile, Done;
3344 __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift);
3345 __ andl(rdx, 0x1);
3346
3347 // Get object from stack
3348 pop_and_check_object(rcx);
3349
3350 // field address
3351 const Address field(rcx, rbx, Address::times_1);
3352
3353 // Check for volatile store
3354 __ testl(rdx, rdx);
3355 __ jcc(Assembler::zero, notVolatile);
3356
3357 fast_storefield_helper(field, rax);
3358 volatile_barrier(Assembler::Membar_mask_bits(Assembler::StoreLoad |
3359 Assembler::StoreStore));
3360 __ jmp(Done);
3361 __ bind(notVolatile);
3362
3363 fast_storefield_helper(field, rax);
3364
3365 __ bind(Done);
3366 }
3367
3368 void TemplateTable::fast_storefield_helper(Address field, Register rax) {
3369
3370 // access field
3371 switch (bytecode()) {
3372 case Bytecodes::_fast_aputfield:
3373 do_oop_store(_masm, field, rax);
3374 break;
3375 case Bytecodes::_fast_lputfield:
3376 #ifdef _LP64
3377 __ access_store_at(T_LONG, IN_HEAP, field, noreg /* ltos */, noreg, noreg, noreg);
3378 #else
3379 __ stop("should not be rewritten");
3380 #endif
3381 break;
3382 case Bytecodes::_fast_iputfield:
3383 __ access_store_at(T_INT, IN_HEAP, field, rax, noreg, noreg, noreg);
3384 break;
3385 case Bytecodes::_fast_zputfield:
3386 __ access_store_at(T_BOOLEAN, IN_HEAP, field, rax, noreg, noreg, noreg);
3387 break;
3388 case Bytecodes::_fast_bputfield:
3389 __ access_store_at(T_BYTE, IN_HEAP, field, rax, noreg, noreg, noreg);
3390 break;
3391 case Bytecodes::_fast_sputfield:
3392 __ access_store_at(T_SHORT, IN_HEAP, field, rax, noreg, noreg, noreg);
3393 break;
3394 case Bytecodes::_fast_cputfield:
3395 __ access_store_at(T_CHAR, IN_HEAP, field, rax, noreg, noreg, noreg);
3396 break;
3397 case Bytecodes::_fast_fputfield:
3398 __ access_store_at(T_FLOAT, IN_HEAP, field, noreg /* ftos*/, noreg, noreg, noreg);
3399 break;
3400 case Bytecodes::_fast_dputfield:
3401 __ access_store_at(T_DOUBLE, IN_HEAP, field, noreg /* dtos*/, noreg, noreg, noreg);
3402 break;
3403 default:
3404 ShouldNotReachHere();
3405 }
3406 }
3407
3408 void TemplateTable::fast_accessfield(TosState state) {
3409 transition(atos, state);
3410
3411 // Do the JVMTI work here to avoid disturbing the register state below
3412 if (JvmtiExport::can_post_field_access()) {
3413 // Check to see if a field access watch has been set before we
3414 // take the time to call into the VM.
3415 Label L1;
3416 __ mov32(rcx, ExternalAddress((address) JvmtiExport::get_field_access_count_addr()));
3417 __ testl(rcx, rcx);
3418 __ jcc(Assembler::zero, L1);
3419 // access constant pool cache entry
3420 LP64_ONLY(__ get_cache_entry_pointer_at_bcp(c_rarg2, rcx, 1));
3421 NOT_LP64(__ get_cache_entry_pointer_at_bcp(rcx, rdx, 1));
3422 __ verify_oop(rax);
3423 __ push_ptr(rax); // save object pointer before call_VM() clobbers it
3424 LP64_ONLY(__ mov(c_rarg1, rax));
3425 // c_rarg1: object pointer copied above
3426 // c_rarg2: cache entry pointer
3427 LP64_ONLY(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), c_rarg1, c_rarg2));
3428 NOT_LP64(__ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access), rax, rcx));
3429 __ pop_ptr(rax); // restore object pointer
3430 __ bind(L1);
3431 }
3432
3433 // access constant pool cache
3434 __ get_cache_and_index_at_bcp(rcx, rbx, 1);
3435 // replace index with field offset from cache entry
3436 // [jk] not needed currently
3437 // __ movl(rdx, Address(rcx, rbx, Address::times_8,
3438 // in_bytes(ConstantPoolCache::base_offset() +
3439 // ConstantPoolCacheEntry::flags_offset())));
3440 // __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift);
3441 // __ andl(rdx, 0x1);
3442 //
3443 __ movptr(rbx, Address(rcx, rbx, Address::times_ptr,
3444 in_bytes(ConstantPoolCache::base_offset() +
3445 ConstantPoolCacheEntry::f2_offset())));
3446
3447 // rax: object
3448 __ verify_oop(rax);
3449 __ null_check(rax);
3450 Address field(rax, rbx, Address::times_1);
3451
3452 // access field
3453 switch (bytecode()) {
3454 case Bytecodes::_fast_agetfield:
3455 do_oop_load(_masm, field, rax);
3456 __ verify_oop(rax);
3457 break;
3458 case Bytecodes::_fast_lgetfield:
3459 #ifdef _LP64
3460 __ access_load_at(T_LONG, IN_HEAP, noreg /* ltos */, field, noreg, noreg);
3461 #else
3462 __ stop("should not be rewritten");
3463 #endif
3464 break;
3465 case Bytecodes::_fast_igetfield:
3466 __ access_load_at(T_INT, IN_HEAP, rax, field, noreg, noreg);
3467 break;
3468 case Bytecodes::_fast_bgetfield:
3469 __ access_load_at(T_BYTE, IN_HEAP, rax, field, noreg, noreg);
3470 break;
3471 case Bytecodes::_fast_sgetfield:
3472 __ access_load_at(T_SHORT, IN_HEAP, rax, field, noreg, noreg);
3473 break;
3474 case Bytecodes::_fast_cgetfield:
3475 __ access_load_at(T_CHAR, IN_HEAP, rax, field, noreg, noreg);
3476 break;
3477 case Bytecodes::_fast_fgetfield:
3478 __ access_load_at(T_FLOAT, IN_HEAP, noreg /* ftos */, field, noreg, noreg);
3479 break;
3480 case Bytecodes::_fast_dgetfield:
3481 __ access_load_at(T_DOUBLE, IN_HEAP, noreg /* dtos */, field, noreg, noreg);
3482 break;
3483 default:
3484 ShouldNotReachHere();
3485 }
3486 // [jk] not needed currently
3487 // Label notVolatile;
3488 // __ testl(rdx, rdx);
3489 // __ jcc(Assembler::zero, notVolatile);
3490 // __ membar(Assembler::LoadLoad);
3491 // __ bind(notVolatile);
3492 }
3493
3494 void TemplateTable::fast_xaccess(TosState state) {
3495 transition(vtos, state);
3496
3497 // get receiver
3498 __ movptr(rax, aaddress(0));
3499 // access constant pool cache
3500 __ get_cache_and_index_at_bcp(rcx, rdx, 2);
3501 __ movptr(rbx,
3502 Address(rcx, rdx, Address::times_ptr,
3503 in_bytes(ConstantPoolCache::base_offset() +
3504 ConstantPoolCacheEntry::f2_offset())));
3505 // make sure exception is reported in correct bcp range (getfield is
3506 // next instruction)
3507 __ increment(rbcp);
3508 __ null_check(rax);
3509 const Address field = Address(rax, rbx, Address::times_1, 0*wordSize);
3510 switch (state) {
3511 case itos:
3512 __ access_load_at(T_INT, IN_HEAP, rax, field, noreg, noreg);
3513 break;
3514 case atos:
3515 do_oop_load(_masm, field, rax);
3516 __ verify_oop(rax);
3517 break;
3518 case ftos:
3519 __ access_load_at(T_FLOAT, IN_HEAP, noreg /* ftos */, field, noreg, noreg);
3520 break;
3521 default:
3522 ShouldNotReachHere();
3523 }
3524
3525 // [jk] not needed currently
3526 // Label notVolatile;
3527 // __ movl(rdx, Address(rcx, rdx, Address::times_8,
3528 // in_bytes(ConstantPoolCache::base_offset() +
3529 // ConstantPoolCacheEntry::flags_offset())));
3530 // __ shrl(rdx, ConstantPoolCacheEntry::is_volatile_shift);
3531 // __ testl(rdx, 0x1);
3532 // __ jcc(Assembler::zero, notVolatile);
3533 // __ membar(Assembler::LoadLoad);
3534 // __ bind(notVolatile);
3535
3536 __ decrement(rbcp);
3537 }
3538
3539 //-----------------------------------------------------------------------------
3540 // Calls
3541
3542 void TemplateTable::prepare_invoke(int byte_no,
3543 Register method, // linked method (or i-klass)
3544 Register index, // itable index, MethodType, etc.
3545 Register recv, // if caller wants to see it
3546 Register flags // if caller wants to test it
3547 ) {
3548 // determine flags
3549 const Bytecodes::Code code = bytecode();
3550 const bool is_invokeinterface = code == Bytecodes::_invokeinterface;
3551 const bool is_invokedynamic = code == Bytecodes::_invokedynamic;
3552 const bool is_invokehandle = code == Bytecodes::_invokehandle;
3553 const bool is_invokevirtual = code == Bytecodes::_invokevirtual;
3554 const bool is_invokespecial = code == Bytecodes::_invokespecial;
3555 const bool load_receiver = (recv != noreg);
3556 const bool save_flags = (flags != noreg);
3557 assert(load_receiver == (code != Bytecodes::_invokestatic && code != Bytecodes::_invokedynamic), "");
3558 assert(save_flags == (is_invokeinterface || is_invokevirtual), "need flags for vfinal");
3559 assert(flags == noreg || flags == rdx, "");
3560 assert(recv == noreg || recv == rcx, "");
3561
3562 // setup registers & access constant pool cache
3563 if (recv == noreg) recv = rcx;
3564 if (flags == noreg) flags = rdx;
3565 assert_different_registers(method, index, recv, flags);
3566
3567 // save 'interpreter return address'
3568 __ save_bcp();
3569
3570 load_invoke_cp_cache_entry(byte_no, method, index, flags, is_invokevirtual, false, is_invokedynamic);
3571
3572 // maybe push appendix to arguments (just before return address)
3573 if (is_invokedynamic || is_invokehandle) {
3574 Label L_no_push;
3575 __ testl(flags, (1 << ConstantPoolCacheEntry::has_appendix_shift));
3576 __ jcc(Assembler::zero, L_no_push);
3577 // Push the appendix as a trailing parameter.
3578 // This must be done before we get the receiver,
3579 // since the parameter_size includes it.
3580 __ push(rbx);
3581 __ mov(rbx, index);
3582 __ load_resolved_reference_at_index(index, rbx);
3583 __ pop(rbx);
3584 __ push(index); // push appendix (MethodType, CallSite, etc.)
3585 __ bind(L_no_push);
3586 }
3587
3588 // load receiver if needed (after appendix is pushed so parameter size is correct)
3589 // Note: no return address pushed yet
3590 if (load_receiver) {
3591 __ movl(recv, flags);
3592 __ andl(recv, ConstantPoolCacheEntry::parameter_size_mask);
3593 const int no_return_pc_pushed_yet = -1; // argument slot correction before we push return address
3594 const int receiver_is_at_end = -1; // back off one slot to get receiver
3595 Address recv_addr = __ argument_address(recv, no_return_pc_pushed_yet + receiver_is_at_end);
3596 __ movptr(recv, recv_addr);
3597 __ verify_oop(recv);
3598 }
3599
3600 if (save_flags) {
3601 __ movl(rbcp, flags);
3602 }
3603
3604 // compute return type
3605 __ shrl(flags, ConstantPoolCacheEntry::tos_state_shift);
3606 // Make sure we don't need to mask flags after the above shift
3607 ConstantPoolCacheEntry::verify_tos_state_shift();
3608 // load return address
3609 {
3610 const address table_addr = (address) Interpreter::invoke_return_entry_table_for(code);
3611 ExternalAddress table(table_addr);
3612 #ifdef _LP64
3613 __ lea(rscratch1, table);
3614 __ movptr(flags, Address(rscratch1, flags, Address::times_ptr));
3615 #else
3616 __ movptr(flags, ArrayAddress(table, Address(noreg, flags, Address::times_ptr)));
3617 #endif // _LP64
3618 }
3619
3620 // push return address
3621 __ push(flags);
3622
3623 // Restore flags value from the constant pool cache, and restore rsi
3624 // for later null checks. r13 is the bytecode pointer
3625 if (save_flags) {
3626 __ movl(flags, rbcp);
3627 __ restore_bcp();
3628 }
3629 }
3630
3631 void TemplateTable::invokevirtual_helper(Register index,
3632 Register recv,
3633 Register flags) {
3634 // Uses temporary registers rax, rdx
3635 assert_different_registers(index, recv, rax, rdx);
3636 assert(index == rbx, "");
3637 assert(recv == rcx, "");
3638
3639 // Test for an invoke of a final method
3640 Label notFinal;
3641 __ movl(rax, flags);
3642 __ andl(rax, (1 << ConstantPoolCacheEntry::is_vfinal_shift));
3643 __ jcc(Assembler::zero, notFinal);
3644
3645 const Register method = index; // method must be rbx
3646 assert(method == rbx,
3647 "Method* must be rbx for interpreter calling convention");
3648
3649 // do the call - the index is actually the method to call
3650 // that is, f2 is a vtable index if !is_vfinal, else f2 is a Method*
3651
3652 // It's final, need a null check here!
3653 __ null_check(recv);
3654
3655 // profile this call
3656 __ profile_final_call(rax);
3657 __ profile_arguments_type(rax, method, rbcp, true);
3658
3659 __ jump_from_interpreted(method, rax);
3660
3661 __ bind(notFinal);
3662
3663 // get receiver klass
3664 __ load_klass_check_null(rax, recv, rscratch1);
3665
3666 // profile this call
3667 __ profile_virtual_call(rax, rlocals, rdx);
3668 // get target Method* & entry point
3669 __ lookup_virtual_method(rax, index, method);
3670
3671 __ profile_arguments_type(rdx, method, rbcp, true);
3672 __ jump_from_interpreted(method, rdx);
3673 }
3674
3675 void TemplateTable::invokevirtual(int byte_no) {
3676 transition(vtos, vtos);
3677 assert(byte_no == f2_byte, "use this argument");
3678 prepare_invoke(byte_no,
3679 rbx, // method or vtable index
3680 noreg, // unused itable index
3681 rcx, rdx); // recv, flags
3682
3683 // rbx: index
3684 // rcx: receiver
3685 // rdx: flags
3686
3687 invokevirtual_helper(rbx, rcx, rdx);
3688 }
3689
3690 void TemplateTable::invokespecial(int byte_no) {
3691 transition(vtos, vtos);
3692 assert(byte_no == f1_byte, "use this argument");
3693 prepare_invoke(byte_no, rbx, noreg, // get f1 Method*
3694 rcx); // get receiver also for null check
3695 __ verify_oop(rcx);
3696 __ null_check(rcx);
3697 // do the call
3698 __ profile_call(rax);
3699 __ profile_arguments_type(rax, rbx, rbcp, false);
3700 __ jump_from_interpreted(rbx, rax);
3701 }
3702
3703 void TemplateTable::invokestatic(int byte_no) {
3704 transition(vtos, vtos);
3705 assert(byte_no == f1_byte, "use this argument");
3706 prepare_invoke(byte_no, rbx); // get f1 Method*
3707 // do the call
3708 __ profile_call(rax);
3709 __ profile_arguments_type(rax, rbx, rbcp, false);
3710 __ jump_from_interpreted(rbx, rax);
3711 }
3712
3713
3714 void TemplateTable::fast_invokevfinal(int byte_no) {
3715 transition(vtos, vtos);
3716 assert(byte_no == f2_byte, "use this argument");
3717 __ stop("fast_invokevfinal not used on x86");
3718 }
3719
3720
3721 void TemplateTable::invokeinterface(int byte_no) {
3722 transition(vtos, vtos);
3723 assert(byte_no == f1_byte, "use this argument");
3724 prepare_invoke(byte_no, rax, rbx, // get f1 Klass*, f2 Method*
3725 rcx, rdx); // recv, flags
3726
3727 // rax: reference klass (from f1) if interface method
3728 // rbx: method (from f2)
3729 // rcx: receiver
3730 // rdx: flags
3731
3732 // First check for Object case, then private interface method,
3733 // then regular interface method.
3734
3735 // Special case of invokeinterface called for virtual method of
3736 // java.lang.Object. See cpCache.cpp for details.
3737 Label notObjectMethod;
3738 __ movl(rlocals, rdx);
3739 __ andl(rlocals, (1 << ConstantPoolCacheEntry::is_forced_virtual_shift));
3740 __ jcc(Assembler::zero, notObjectMethod);
3741 invokevirtual_helper(rbx, rcx, rdx);
3742 // no return from above
3743 __ bind(notObjectMethod);
3744
3745 Label no_such_interface; // for receiver subtype check
3746 Register recvKlass; // used for exception processing
3747
3748 // Check for private method invocation - indicated by vfinal
3749 Label notVFinal;
3750 __ movl(rlocals, rdx);
3751 __ andl(rlocals, (1 << ConstantPoolCacheEntry::is_vfinal_shift));
3752 __ jcc(Assembler::zero, notVFinal);
3753
3754 // Get receiver klass into rlocals - also a null check
3755 __ load_klass_check_null(rlocals, rcx, rscratch1);
3756
3757 Label subtype;
3758 __ check_klass_subtype(rlocals, rax, rbcp, subtype);
3759 // If we get here the typecheck failed
3760 recvKlass = rdx;
3761 __ mov(recvKlass, rlocals); // shuffle receiver class for exception use
3762 __ jmp(no_such_interface);
3763
3764 __ bind(subtype);
3765
3766 // do the call - rbx is actually the method to call
3767
3768 __ profile_final_call(rdx);
3769 __ profile_arguments_type(rdx, rbx, rbcp, true);
3770
3771 __ jump_from_interpreted(rbx, rdx);
3772 // no return from above
3773 __ bind(notVFinal);
3774
3775 // Get receiver klass into rdx - also a null check
3776 __ restore_locals(); // restore r14
3777 __ load_klass_check_null(rdx, rcx, rscratch1);
3778
3779 Label no_such_method;
3780
3781 // Preserve method for throw_AbstractMethodErrorVerbose.
3782 __ mov(rcx, rbx);
3783 // Receiver subtype check against REFC.
3784 // Superklass in rax. Subklass in rdx. Blows rcx, rdi.
3785 __ lookup_interface_method(// inputs: rec. class, interface, itable index
3786 rdx, rax, noreg,
3787 // outputs: scan temp. reg, scan temp. reg
3788 rbcp, rlocals,
3789 no_such_interface,
3790 /*return_method=*/false);
3791
3792 // profile this call
3793 __ restore_bcp(); // rbcp was destroyed by receiver type check
3794 __ profile_virtual_call(rdx, rbcp, rlocals);
3795
3796 // Get declaring interface class from method, and itable index
3797 __ load_method_holder(rax, rbx);
3798 __ movl(rbx, Address(rbx, Method::itable_index_offset()));
3799 __ subl(rbx, Method::itable_index_max);
3800 __ negl(rbx);
3801
3802 // Preserve recvKlass for throw_AbstractMethodErrorVerbose.
3803 __ mov(rlocals, rdx);
3804 __ lookup_interface_method(// inputs: rec. class, interface, itable index
3805 rlocals, rax, rbx,
3806 // outputs: method, scan temp. reg
3807 rbx, rbcp,
3808 no_such_interface);
3809
3810 // rbx: Method* to call
3811 // rcx: receiver
3812 // Check for abstract method error
3813 // Note: This should be done more efficiently via a throw_abstract_method_error
3814 // interpreter entry point and a conditional jump to it in case of a null
3815 // method.
3816 __ testptr(rbx, rbx);
3817 __ jcc(Assembler::zero, no_such_method);
3818
3819 __ profile_arguments_type(rdx, rbx, rbcp, true);
3820
3821 // do the call
3822 // rcx: receiver
3823 // rbx,: Method*
3824 __ jump_from_interpreted(rbx, rdx);
3825 __ should_not_reach_here();
3826
3827 // exception handling code follows...
3828 // note: must restore interpreter registers to canonical
3829 // state for exception handling to work correctly!
3830
3831 __ bind(no_such_method);
3832 // throw exception
3833 __ pop(rbx); // pop return address (pushed by prepare_invoke)
3834 __ restore_bcp(); // rbcp must be correct for exception handler (was destroyed)
3835 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
3836 // Pass arguments for generating a verbose error message.
3837 #ifdef _LP64
3838 recvKlass = c_rarg1;
3839 Register method = c_rarg2;
3840 if (recvKlass != rdx) { __ movq(recvKlass, rdx); }
3841 if (method != rcx) { __ movq(method, rcx); }
3842 #else
3843 recvKlass = rdx;
3844 Register method = rcx;
3845 #endif
3846 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodErrorVerbose),
3847 recvKlass, method);
3848 // The call_VM checks for exception, so we should never return here.
3849 __ should_not_reach_here();
3850
3851 __ bind(no_such_interface);
3852 // throw exception
3853 __ pop(rbx); // pop return address (pushed by prepare_invoke)
3854 __ restore_bcp(); // rbcp must be correct for exception handler (was destroyed)
3855 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
3856 // Pass arguments for generating a verbose error message.
3857 LP64_ONLY( if (recvKlass != rdx) { __ movq(recvKlass, rdx); } )
3858 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose),
3859 recvKlass, rax);
3860 // the call_VM checks for exception, so we should never return here.
3861 __ should_not_reach_here();
3862 }
3863
3864 void TemplateTable::invokehandle(int byte_no) {
3865 transition(vtos, vtos);
3866 assert(byte_no == f1_byte, "use this argument");
3867 const Register rbx_method = rbx;
3868 const Register rax_mtype = rax;
3869 const Register rcx_recv = rcx;
3870 const Register rdx_flags = rdx;
3871
3872 prepare_invoke(byte_no, rbx_method, rax_mtype, rcx_recv);
3873 __ verify_method_ptr(rbx_method);
3874 __ verify_oop(rcx_recv);
3875 __ null_check(rcx_recv);
3876
3877 // rax: MethodType object (from cpool->resolved_references[f1], if necessary)
3878 // rbx: MH.invokeExact_MT method (from f2)
3879
3880 // Note: rax_mtype is already pushed (if necessary) by prepare_invoke
3881
3882 // FIXME: profile the LambdaForm also
3883 __ profile_final_call(rax);
3884 __ profile_arguments_type(rdx, rbx_method, rbcp, true);
3885
3886 __ jump_from_interpreted(rbx_method, rdx);
3887 }
3888
3889 void TemplateTable::invokedynamic(int byte_no) {
3890 transition(vtos, vtos);
3891 assert(byte_no == f1_byte, "use this argument");
3892
3893 const Register rbx_method = rbx;
3894 const Register rax_callsite = rax;
3895
3896 prepare_invoke(byte_no, rbx_method, rax_callsite);
3897
3898 // rax: CallSite object (from cpool->resolved_references[f1])
3899 // rbx: MH.linkToCallSite method (from f2)
3900
3901 // Note: rax_callsite is already pushed by prepare_invoke
3902
3903 // %%% should make a type profile for any invokedynamic that takes a ref argument
3904 // profile this call
3905 __ profile_call(rbcp);
3906 __ profile_arguments_type(rdx, rbx_method, rbcp, false);
3907
3908 __ verify_oop(rax_callsite);
3909
3910 __ jump_from_interpreted(rbx_method, rdx);
3911 }
3912
3913 //-----------------------------------------------------------------------------
3914 // Allocation
3915
3916 void TemplateTable::_new() {
3917 transition(vtos, atos);
3918 __ get_unsigned_2_byte_index_at_bcp(rdx, 1);
3919 Label slow_case;
3920 Label slow_case_no_pop;
3921 Label done;
3922 Label initialize_header;
3923
3924 __ get_cpool_and_tags(rcx, rax);
3925
3926 // Make sure the class we're about to instantiate has been resolved.
3927 // This is done before loading InstanceKlass to be consistent with the order
3928 // how Constant Pool is updated (see ConstantPool::klass_at_put)
3929 const int tags_offset = Array<u1>::base_offset_in_bytes();
3930 __ cmpb(Address(rax, rdx, Address::times_1, tags_offset), JVM_CONSTANT_Class);
3931 __ jcc(Assembler::notEqual, slow_case_no_pop);
3932
3933 // get InstanceKlass
3934 __ load_resolved_klass_at_index(rcx, rcx, rdx);
3935 __ push(rcx); // save the contexts of klass for initializing the header
3936
3937 // make sure klass is initialized & doesn't have finalizer
3938 // make sure klass is fully initialized
3939 __ cmpb(Address(rcx, InstanceKlass::init_state_offset()), InstanceKlass::fully_initialized);
3940 __ jcc(Assembler::notEqual, slow_case);
3941
3942 // get instance_size in InstanceKlass (scaled to a count of bytes)
3943 __ movl(rdx, Address(rcx, Klass::layout_helper_offset()));
3944 // test to see if it has a finalizer or is malformed in some way
3945 __ testl(rdx, Klass::_lh_instance_slow_path_bit);
3946 __ jcc(Assembler::notZero, slow_case);
3947
3948 // Allocate the instance:
3949 // If TLAB is enabled:
3950 // Try to allocate in the TLAB.
3951 // If fails, go to the slow path.
3952 // Initialize the allocation.
3953 // Exit.
3954 //
3955 // Go to slow path.
3956
3957 const Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
3958
3959 if (UseTLAB) {
3960 NOT_LP64(__ get_thread(thread);)
3961 __ tlab_allocate(thread, rax, rdx, 0, rcx, rbx, slow_case);
3962 if (ZeroTLAB) {
3963 // the fields have been already cleared
3964 __ jmp(initialize_header);
3965 }
3966
3967 // The object is initialized before the header. If the object size is
3968 // zero, go directly to the header initialization.
3969 int header_size = align_up(oopDesc::base_offset_in_bytes(), BytesPerLong);
3970 __ decrement(rdx, header_size);
3971 __ jcc(Assembler::zero, initialize_header);
3972
3973 // Initialize topmost object field, divide rdx by 8, check if odd and
3974 // test if zero.
3975 __ xorl(rcx, rcx); // use zero reg to clear memory (shorter code)
3976 __ shrl(rdx, LogBytesPerLong); // divide by 2*oopSize and set carry flag if odd
3977
3978 // rdx must have been multiple of 8
3979 #ifdef ASSERT
3980 // make sure rdx was multiple of 8
3981 Label L;
3982 // Ignore partial flag stall after shrl() since it is debug VM
3983 __ jcc(Assembler::carryClear, L);
3984 __ stop("object size is not multiple of 2 - adjust this code");
3985 __ bind(L);
3986 // rdx must be > 0, no extra check needed here
3987 #endif
3988
3989 // initialize remaining object fields: rdx was a multiple of 8
3990 { Label loop;
3991 __ bind(loop);
3992 __ movptr(Address(rax, rdx, Address::times_8, header_size - 1*oopSize), rcx);
3993 NOT_LP64(__ movptr(Address(rax, rdx, Address::times_8, header_size - 2*oopSize), rcx));
3994 __ decrement(rdx);
3995 __ jcc(Assembler::notZero, loop);
3996 }
3997
3998 // initialize object header only.
3999 __ bind(initialize_header);
4000 if (UseCompactObjectHeaders) {
4001 __ pop(rcx); // get saved klass back in the register.
4002 __ movptr(rbx, Address(rcx, Klass::prototype_header_offset()));
4003 __ movptr(Address(rax, oopDesc::mark_offset_in_bytes ()), rbx);
4004 } else {
4005 __ movptr(Address(rax, oopDesc::mark_offset_in_bytes()),
4006 (intptr_t)markWord::prototype().value()); // header
4007 __ pop(rcx); // get saved klass back in the register.
4008 #ifdef _LP64
4009 __ xorl(rsi, rsi); // use zero reg to clear memory (shorter code)
4010 __ store_klass_gap(rax, rsi); // zero klass gap for compressed oops
4011 #endif
4012 __ store_klass(rax, rcx, rscratch1); // klass
4013 }
4014
4015 {
4016 SkipIfEqual skip_if(_masm, &DTraceAllocProbes, 0, rscratch1);
4017 // Trigger dtrace event for fastpath
4018 __ push(atos);
4019 __ call_VM_leaf(
4020 CAST_FROM_FN_PTR(address, static_cast<int (*)(oopDesc*)>(SharedRuntime::dtrace_object_alloc)), rax);
4021 __ pop(atos);
4022 }
4023
4024 __ jmp(done);
4025 }
4026
4027 // slow case
4028 __ bind(slow_case);
4029 __ pop(rcx); // restore stack pointer to what it was when we came in.
4030 __ bind(slow_case_no_pop);
4031
4032 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rax);
4033 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
4034
4035 __ get_constant_pool(rarg1);
4036 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1);
4037 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::_new), rarg1, rarg2);
4038 __ verify_oop(rax);
4039
4040 // continue
4041 __ bind(done);
4042 }
4043
4044 void TemplateTable::newarray() {
4045 transition(itos, atos);
4046 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
4047 __ load_unsigned_byte(rarg1, at_bcp(1));
4048 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::newarray),
4049 rarg1, rax);
4050 }
4051
4052 void TemplateTable::anewarray() {
4053 transition(itos, atos);
4054
4055 Register rarg1 = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
4056 Register rarg2 = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
4057
4058 __ get_unsigned_2_byte_index_at_bcp(rarg2, 1);
4059 __ get_constant_pool(rarg1);
4060 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::anewarray),
4061 rarg1, rarg2, rax);
4062 }
4063
4064 void TemplateTable::arraylength() {
4065 transition(atos, itos);
4066 __ null_check(rax, arrayOopDesc::length_offset_in_bytes());
4067 __ movl(rax, Address(rax, arrayOopDesc::length_offset_in_bytes()));
4068 }
4069
4070 void TemplateTable::checkcast() {
4071 transition(atos, atos);
4072 Label done, is_null, ok_is_subtype, quicked, resolved;
4073 __ testptr(rax, rax); // object is in rax
4074 __ jcc(Assembler::zero, is_null);
4075
4076 // Get cpool & tags index
4077 __ get_cpool_and_tags(rcx, rdx); // rcx=cpool, rdx=tags array
4078 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // rbx=index
4079 // See if bytecode has already been quicked
4080 __ cmpb(Address(rdx, rbx,
4081 Address::times_1,
4082 Array<u1>::base_offset_in_bytes()),
4083 JVM_CONSTANT_Class);
4084 __ jcc(Assembler::equal, quicked);
4085 __ push(atos); // save receiver for result, and for GC
4086 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc));
4087
4088 // vm_result_2 has metadata result
4089 #ifndef _LP64
4090 // borrow rdi from locals
4091 __ get_thread(rdi);
4092 __ get_vm_result_2(rax, rdi);
4093 __ restore_locals();
4094 #else
4095 __ get_vm_result_2(rax, r15_thread);
4096 #endif
4097
4098 __ pop_ptr(rdx); // restore receiver
4099 __ jmpb(resolved);
4100
4101 // Get superklass in rax and subklass in rbx
4102 __ bind(quicked);
4103 __ mov(rdx, rax); // Save object in rdx; rax needed for subtype check
4104 __ load_resolved_klass_at_index(rax, rcx, rbx);
4105
4106 __ bind(resolved);
4107 __ load_klass(rbx, rdx, rscratch1);
4108
4109 // Generate subtype check. Blows rcx, rdi. Object in rdx.
4110 // Superklass in rax. Subklass in rbx.
4111 __ gen_subtype_check(rbx, ok_is_subtype);
4112
4113 // Come here on failure
4114 __ push_ptr(rdx);
4115 // object is at TOS
4116 __ jump(ExternalAddress(Interpreter::_throw_ClassCastException_entry));
4117
4118 // Come here on success
4119 __ bind(ok_is_subtype);
4120 __ mov(rax, rdx); // Restore object in rdx
4121
4122 // Collect counts on whether this check-cast sees NULLs a lot or not.
4123 if (ProfileInterpreter) {
4124 __ jmp(done);
4125 __ bind(is_null);
4126 __ profile_null_seen(rcx);
4127 } else {
4128 __ bind(is_null); // same as 'done'
4129 }
4130 __ bind(done);
4131 }
4132
4133 void TemplateTable::instanceof() {
4134 transition(atos, itos);
4135 Label done, is_null, ok_is_subtype, quicked, resolved;
4136 __ testptr(rax, rax);
4137 __ jcc(Assembler::zero, is_null);
4138
4139 // Get cpool & tags index
4140 __ get_cpool_and_tags(rcx, rdx); // rcx=cpool, rdx=tags array
4141 __ get_unsigned_2_byte_index_at_bcp(rbx, 1); // rbx=index
4142 // See if bytecode has already been quicked
4143 __ cmpb(Address(rdx, rbx,
4144 Address::times_1,
4145 Array<u1>::base_offset_in_bytes()),
4146 JVM_CONSTANT_Class);
4147 __ jcc(Assembler::equal, quicked);
4148
4149 __ push(atos); // save receiver for result, and for GC
4150 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc));
4151 // vm_result_2 has metadata result
4152
4153 #ifndef _LP64
4154 // borrow rdi from locals
4155 __ get_thread(rdi);
4156 __ get_vm_result_2(rax, rdi);
4157 __ restore_locals();
4158 #else
4159 __ get_vm_result_2(rax, r15_thread);
4160 #endif
4161
4162 __ pop_ptr(rdx); // restore receiver
4163 __ verify_oop(rdx);
4164 __ load_klass(rdx, rdx, rscratch1);
4165 __ jmpb(resolved);
4166
4167 // Get superklass in rax and subklass in rdx
4168 __ bind(quicked);
4169 __ load_klass(rdx, rax, rscratch1);
4170 __ load_resolved_klass_at_index(rax, rcx, rbx);
4171
4172 __ bind(resolved);
4173
4174 // Generate subtype check. Blows rcx, rdi
4175 // Superklass in rax. Subklass in rdx.
4176 __ gen_subtype_check(rdx, ok_is_subtype);
4177
4178 // Come here on failure
4179 __ xorl(rax, rax);
4180 __ jmpb(done);
4181 // Come here on success
4182 __ bind(ok_is_subtype);
4183 __ movl(rax, 1);
4184
4185 // Collect counts on whether this test sees NULLs a lot or not.
4186 if (ProfileInterpreter) {
4187 __ jmp(done);
4188 __ bind(is_null);
4189 __ profile_null_seen(rcx);
4190 } else {
4191 __ bind(is_null); // same as 'done'
4192 }
4193 __ bind(done);
4194 // rax = 0: obj == NULL or obj is not an instanceof the specified klass
4195 // rax = 1: obj != NULL and obj is an instanceof the specified klass
4196 }
4197
4198
4199 //----------------------------------------------------------------------------------------------------
4200 // Breakpoints
4201 void TemplateTable::_breakpoint() {
4202 // Note: We get here even if we are single stepping..
4203 // jbug insists on setting breakpoints at every bytecode
4204 // even if we are in single step mode.
4205
4206 transition(vtos, vtos);
4207
4208 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
4209
4210 // get the unpatched byte code
4211 __ get_method(rarg);
4212 __ call_VM(noreg,
4213 CAST_FROM_FN_PTR(address,
4214 InterpreterRuntime::get_original_bytecode_at),
4215 rarg, rbcp);
4216 __ mov(rbx, rax); // why?
4217
4218 // post the breakpoint event
4219 __ get_method(rarg);
4220 __ call_VM(noreg,
4221 CAST_FROM_FN_PTR(address, InterpreterRuntime::_breakpoint),
4222 rarg, rbcp);
4223
4224 // complete the execution of original bytecode
4225 __ dispatch_only_normal(vtos);
4226 }
4227
4228 //-----------------------------------------------------------------------------
4229 // Exceptions
4230
4231 void TemplateTable::athrow() {
4232 transition(atos, vtos);
4233 __ null_check(rax);
4234 __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
4235 }
4236
4237 //-----------------------------------------------------------------------------
4238 // Synchronization
4239 //
4240 // Note: monitorenter & exit are symmetric routines; which is reflected
4241 // in the assembly code structure as well
4242 //
4243 // Stack layout:
4244 //
4245 // [expressions ] <--- rsp = expression stack top
4246 // ..
4247 // [expressions ]
4248 // [monitor entry] <--- monitor block top = expression stack bot
4249 // ..
4250 // [monitor entry]
4251 // [frame data ] <--- monitor block bot
4252 // ...
4253 // [saved rbp ] <--- rbp
4254 void TemplateTable::monitorenter() {
4255 transition(atos, vtos);
4256
4257 // check for NULL object
4258 __ null_check(rax);
4259
4260 const Address monitor_block_top(
4261 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
4262 const Address monitor_block_bot(
4263 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
4264 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
4265
4266 Label allocated;
4267
4268 Register rtop = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
4269 Register rbot = LP64_ONLY(c_rarg2) NOT_LP64(rbx);
4270 Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
4271
4272 // initialize entry pointer
4273 __ xorl(rmon, rmon); // points to free slot or NULL
4274
4275 // find a free slot in the monitor block (result in rmon)
4276 {
4277 Label entry, loop, exit;
4278 __ movptr(rtop, monitor_block_top); // points to current entry,
4279 // starting with top-most entry
4280 __ lea(rbot, monitor_block_bot); // points to word before bottom
4281 // of monitor block
4282 __ jmpb(entry);
4283
4284 __ bind(loop);
4285 // check if current entry is used
4286 __ cmpptr(Address(rtop, BasicObjectLock::obj_offset_in_bytes()), NULL_WORD);
4287 // if not used then remember entry in rmon
4288 __ cmovptr(Assembler::equal, rmon, rtop); // cmov => cmovptr
4289 // check if current entry is for same object
4290 __ cmpptr(rax, Address(rtop, BasicObjectLock::obj_offset_in_bytes()));
4291 // if same object then stop searching
4292 __ jccb(Assembler::equal, exit);
4293 // otherwise advance to next entry
4294 __ addptr(rtop, entry_size);
4295 __ bind(entry);
4296 // check if bottom reached
4297 __ cmpptr(rtop, rbot);
4298 // if not at bottom then check this entry
4299 __ jcc(Assembler::notEqual, loop);
4300 __ bind(exit);
4301 }
4302
4303 __ testptr(rmon, rmon); // check if a slot has been found
4304 __ jcc(Assembler::notZero, allocated); // if found, continue with that one
4305
4306 // allocate one if there's no free slot
4307 {
4308 Label entry, loop;
4309 // 1. compute new pointers // rsp: old expression stack top
4310 __ movptr(rmon, monitor_block_bot); // rmon: old expression stack bottom
4311 __ subptr(rsp, entry_size); // move expression stack top
4312 __ subptr(rmon, entry_size); // move expression stack bottom
4313 __ mov(rtop, rsp); // set start value for copy loop
4314 __ movptr(monitor_block_bot, rmon); // set new monitor block bottom
4315 __ jmp(entry);
4316 // 2. move expression stack contents
4317 __ bind(loop);
4318 __ movptr(rbot, Address(rtop, entry_size)); // load expression stack
4319 // word from old location
4320 __ movptr(Address(rtop, 0), rbot); // and store it at new location
4321 __ addptr(rtop, wordSize); // advance to next word
4322 __ bind(entry);
4323 __ cmpptr(rtop, rmon); // check if bottom reached
4324 __ jcc(Assembler::notEqual, loop); // if not at bottom then
4325 // copy next word
4326 }
4327
4328 // call run-time routine
4329 // rmon: points to monitor entry
4330 __ bind(allocated);
4331
4332 // Increment bcp to point to the next bytecode, so exception
4333 // handling for async. exceptions work correctly.
4334 // The object has already been popped from the stack, so the
4335 // expression stack looks correct.
4336 __ increment(rbcp);
4337
4338 // store object
4339 __ movptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), rax);
4340 __ lock_object(rmon);
4341
4342 // check to make sure this monitor doesn't cause stack overflow after locking
4343 __ save_bcp(); // in case of exception
4344 __ generate_stack_overflow_check(0);
4345
4346 // The bcp has already been incremented. Just need to dispatch to
4347 // next instruction.
4348 __ dispatch_next(vtos);
4349 }
4350
4351 void TemplateTable::monitorexit() {
4352 transition(atos, vtos);
4353
4354 // check for NULL object
4355 __ null_check(rax);
4356
4357 const Address monitor_block_top(
4358 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
4359 const Address monitor_block_bot(
4360 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
4361 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
4362
4363 Register rtop = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
4364 Register rbot = LP64_ONLY(c_rarg2) NOT_LP64(rbx);
4365
4366 Label found;
4367
4368 // find matching slot
4369 {
4370 Label entry, loop;
4371 __ movptr(rtop, monitor_block_top); // points to current entry,
4372 // starting with top-most entry
4373 __ lea(rbot, monitor_block_bot); // points to word before bottom
4374 // of monitor block
4375 __ jmpb(entry);
4376
4377 __ bind(loop);
4378 // check if current entry is for same object
4379 __ cmpptr(rax, Address(rtop, BasicObjectLock::obj_offset_in_bytes()));
4380 // if same object then stop searching
4381 __ jcc(Assembler::equal, found);
4382 // otherwise advance to next entry
4383 __ addptr(rtop, entry_size);
4384 __ bind(entry);
4385 // check if bottom reached
4386 __ cmpptr(rtop, rbot);
4387 // if not at bottom then check this entry
4388 __ jcc(Assembler::notEqual, loop);
4389 }
4390
4391 // error handling. Unlocking was not block-structured
4392 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
4393 InterpreterRuntime::throw_illegal_monitor_state_exception));
4394 __ should_not_reach_here();
4395
4396 // call run-time routine
4397 __ bind(found);
4398 __ push_ptr(rax); // make sure object is on stack (contract with oopMaps)
4399 __ unlock_object(rtop);
4400 __ pop_ptr(rax); // discard object
4401 }
4402
4403 // Wide instructions
4404 void TemplateTable::wide() {
4405 transition(vtos, vtos);
4406 __ load_unsigned_byte(rbx, at_bcp(1));
4407 ExternalAddress wtable((address)Interpreter::_wentry_point);
4408 __ jump(ArrayAddress(wtable, Address(noreg, rbx, Address::times_ptr)), rscratch1);
4409 // Note: the rbcp increment step is part of the individual wide bytecode implementations
4410 }
4411
4412 // Multi arrays
4413 void TemplateTable::multianewarray() {
4414 transition(vtos, atos);
4415
4416 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rax);
4417 __ load_unsigned_byte(rax, at_bcp(3)); // get number of dimensions
4418 // last dim is on top of stack; we want address of first one:
4419 // first_addr = last_addr + (ndims - 1) * stackElementSize - 1*wordsize
4420 // the latter wordSize to point to the beginning of the array.
4421 __ lea(rarg, Address(rsp, rax, Interpreter::stackElementScale(), -wordSize));
4422 call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::multianewarray), rarg);
4423 __ load_unsigned_byte(rbx, at_bcp(3));
4424 __ lea(rsp, Address(rsp, rbx, Interpreter::stackElementScale())); // get rid of counts
4425 }