1 /*
2 * Copyright (c) 2003, 2022, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, Red Hat Inc. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "asm/macroAssembler.inline.hpp"
28 #include "compiler/compilerDefinitions.inline.hpp"
29 #include "gc/shared/barrierSetAssembler.hpp"
30 #include "gc/shared/collectedHeap.hpp"
31 #include "gc/shared/tlab_globals.hpp"
32 #include "interpreter/interpreter.hpp"
33 #include "interpreter/interpreterRuntime.hpp"
34 #include "interpreter/interp_masm.hpp"
35 #include "interpreter/templateTable.hpp"
36 #include "memory/universe.hpp"
37 #include "oops/methodData.hpp"
38 #include "oops/method.hpp"
39 #include "oops/objArrayKlass.hpp"
40 #include "oops/oop.inline.hpp"
41 #include "prims/jvmtiExport.hpp"
42 #include "prims/methodHandles.hpp"
43 #include "runtime/frame.inline.hpp"
44 #include "runtime/sharedRuntime.hpp"
45 #include "runtime/stubRoutines.hpp"
46 #include "runtime/synchronizer.hpp"
47 #include "utilities/powerOfTwo.hpp"
48
49 #define __ _masm->
50
51 // Address computation: local variables
52
53 static inline Address iaddress(int n) {
54 return Address(rlocals, Interpreter::local_offset_in_bytes(n));
55 }
56
57 static inline Address laddress(int n) {
58 return iaddress(n + 1);
59 }
60
61 static inline Address faddress(int n) {
62 return iaddress(n);
63 }
64
65 static inline Address daddress(int n) {
66 return laddress(n);
67 }
68
69 static inline Address aaddress(int n) {
70 return iaddress(n);
71 }
72
73 static inline Address iaddress(Register r) {
74 return Address(rlocals, r, Address::lsl(3));
75 }
76
77 static inline Address laddress(Register r, Register scratch,
78 InterpreterMacroAssembler* _masm) {
79 __ lea(scratch, Address(rlocals, r, Address::lsl(3)));
80 return Address(scratch, Interpreter::local_offset_in_bytes(1));
81 }
82
83 static inline Address faddress(Register r) {
84 return iaddress(r);
85 }
86
87 static inline Address daddress(Register r, Register scratch,
88 InterpreterMacroAssembler* _masm) {
89 return laddress(r, scratch, _masm);
90 }
91
92 static inline Address aaddress(Register r) {
93 return iaddress(r);
94 }
95
96 static inline Address at_rsp() {
97 return Address(esp, 0);
98 }
99
100 // At top of Java expression stack which may be different than esp(). It
101 // isn't for category 1 objects.
102 static inline Address at_tos () {
103 return Address(esp, Interpreter::expr_offset_in_bytes(0));
104 }
105
106 static inline Address at_tos_p1() {
107 return Address(esp, Interpreter::expr_offset_in_bytes(1));
108 }
109
110 static inline Address at_tos_p2() {
111 return Address(esp, Interpreter::expr_offset_in_bytes(2));
112 }
113
114 static inline Address at_tos_p3() {
115 return Address(esp, Interpreter::expr_offset_in_bytes(3));
116 }
117
118 static inline Address at_tos_p4() {
119 return Address(esp, Interpreter::expr_offset_in_bytes(4));
120 }
121
122 static inline Address at_tos_p5() {
123 return Address(esp, Interpreter::expr_offset_in_bytes(5));
124 }
125
126 // Condition conversion
127 static Assembler::Condition j_not(TemplateTable::Condition cc) {
128 switch (cc) {
129 case TemplateTable::equal : return Assembler::NE;
130 case TemplateTable::not_equal : return Assembler::EQ;
131 case TemplateTable::less : return Assembler::GE;
132 case TemplateTable::less_equal : return Assembler::GT;
133 case TemplateTable::greater : return Assembler::LE;
134 case TemplateTable::greater_equal: return Assembler::LT;
135 }
136 ShouldNotReachHere();
137 return Assembler::EQ;
138 }
139
140
141 // Miscellaneous helper routines
142 // Store an oop (or NULL) at the Address described by obj.
143 // If val == noreg this means store a NULL
144 static void do_oop_store(InterpreterMacroAssembler* _masm,
145 Address dst,
146 Register val,
147 DecoratorSet decorators) {
148 assert(val == noreg || val == r0, "parameter is just for looks");
149 __ store_heap_oop(dst, val, r10, r11, r3, decorators);
150 }
151
152 static void do_oop_load(InterpreterMacroAssembler* _masm,
153 Address src,
154 Register dst,
155 DecoratorSet decorators) {
156 __ load_heap_oop(dst, src, r10, r11, decorators);
157 }
158
159 Address TemplateTable::at_bcp(int offset) {
160 assert(_desc->uses_bcp(), "inconsistent uses_bcp information");
161 return Address(rbcp, offset);
162 }
163
164 void TemplateTable::patch_bytecode(Bytecodes::Code bc, Register bc_reg,
165 Register temp_reg, bool load_bc_into_bc_reg/*=true*/,
166 int byte_no)
167 {
168 if (!RewriteBytecodes) return;
169 Label L_patch_done;
170
171 switch (bc) {
172 case Bytecodes::_fast_aputfield:
173 case Bytecodes::_fast_bputfield:
174 case Bytecodes::_fast_zputfield:
175 case Bytecodes::_fast_cputfield:
176 case Bytecodes::_fast_dputfield:
177 case Bytecodes::_fast_fputfield:
178 case Bytecodes::_fast_iputfield:
179 case Bytecodes::_fast_lputfield:
180 case Bytecodes::_fast_sputfield:
181 {
182 // We skip bytecode quickening for putfield instructions when
183 // the put_code written to the constant pool cache is zero.
184 // This is required so that every execution of this instruction
185 // calls out to InterpreterRuntime::resolve_get_put to do
186 // additional, required work.
187 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");
188 assert(load_bc_into_bc_reg, "we use bc_reg as temp");
189 __ get_cache_and_index_and_bytecode_at_bcp(temp_reg, bc_reg, temp_reg, byte_no, 1);
190 __ movw(bc_reg, bc);
191 __ cbzw(temp_reg, L_patch_done); // don't patch
192 }
193 break;
194 default:
195 assert(byte_no == -1, "sanity");
196 // the pair bytecodes have already done the load.
197 if (load_bc_into_bc_reg) {
198 __ movw(bc_reg, bc);
199 }
200 }
201
202 if (JvmtiExport::can_post_breakpoint()) {
203 Label L_fast_patch;
204 // if a breakpoint is present we can't rewrite the stream directly
205 __ load_unsigned_byte(temp_reg, at_bcp(0));
206 __ cmpw(temp_reg, Bytecodes::_breakpoint);
207 __ br(Assembler::NE, L_fast_patch);
208 // Let breakpoint table handling rewrite to quicker bytecode
209 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::set_original_bytecode_at), rmethod, rbcp, bc_reg);
210 __ b(L_patch_done);
211 __ bind(L_fast_patch);
212 }
213
214 #ifdef ASSERT
215 Label L_okay;
216 __ load_unsigned_byte(temp_reg, at_bcp(0));
217 __ cmpw(temp_reg, (int) Bytecodes::java_code(bc));
218 __ br(Assembler::EQ, L_okay);
219 __ cmpw(temp_reg, bc_reg);
220 __ br(Assembler::EQ, L_okay);
221 __ stop("patching the wrong bytecode");
222 __ bind(L_okay);
223 #endif
224
225 // patch bytecode
226 __ strb(bc_reg, at_bcp(0));
227 __ bind(L_patch_done);
228 }
229
230
231 // Individual instructions
232
233 void TemplateTable::nop() {
234 transition(vtos, vtos);
235 // nothing to do
236 }
237
238 void TemplateTable::shouldnotreachhere() {
239 transition(vtos, vtos);
240 __ stop("shouldnotreachhere bytecode");
241 }
242
243 void TemplateTable::aconst_null()
244 {
245 transition(vtos, atos);
246 __ mov(r0, 0);
247 }
248
249 void TemplateTable::iconst(int value)
250 {
251 transition(vtos, itos);
252 __ mov(r0, value);
253 }
254
255 void TemplateTable::lconst(int value)
256 {
257 __ mov(r0, value);
258 }
259
260 void TemplateTable::fconst(int value)
261 {
262 transition(vtos, ftos);
263 switch (value) {
264 case 0:
265 __ fmovs(v0, 0.0);
266 break;
267 case 1:
268 __ fmovs(v0, 1.0);
269 break;
270 case 2:
271 __ fmovs(v0, 2.0);
272 break;
273 default:
274 ShouldNotReachHere();
275 break;
276 }
277 }
278
279 void TemplateTable::dconst(int value)
280 {
281 transition(vtos, dtos);
282 switch (value) {
283 case 0:
284 __ fmovd(v0, 0.0);
285 break;
286 case 1:
287 __ fmovd(v0, 1.0);
288 break;
289 case 2:
290 __ fmovd(v0, 2.0);
291 break;
292 default:
293 ShouldNotReachHere();
294 break;
295 }
296 }
297
298 void TemplateTable::bipush()
299 {
300 transition(vtos, itos);
301 __ load_signed_byte32(r0, at_bcp(1));
302 }
303
304 void TemplateTable::sipush()
305 {
306 transition(vtos, itos);
307 __ load_unsigned_short(r0, at_bcp(1));
308 __ revw(r0, r0);
309 __ asrw(r0, r0, 16);
310 }
311
312 void TemplateTable::ldc(LdcType type)
313 {
314 transition(vtos, vtos);
315 Label call_ldc, notFloat, notClass, notInt, Done;
316
317 if (is_ldc_wide(type)) {
318 __ get_unsigned_2_byte_index_at_bcp(r1, 1);
319 } else {
320 __ load_unsigned_byte(r1, at_bcp(1));
321 }
322 __ get_cpool_and_tags(r2, r0);
323
324 const int base_offset = ConstantPool::header_size() * wordSize;
325 const int tags_offset = Array<u1>::base_offset_in_bytes();
326
327 // get type
328 __ add(r3, r1, tags_offset);
329 __ lea(r3, Address(r0, r3));
330 __ ldarb(r3, r3);
331
332 // unresolved class - get the resolved class
333 __ cmp(r3, (u1)JVM_CONSTANT_UnresolvedClass);
334 __ br(Assembler::EQ, call_ldc);
335
336 // unresolved class in error state - call into runtime to throw the error
337 // from the first resolution attempt
338 __ cmp(r3, (u1)JVM_CONSTANT_UnresolvedClassInError);
339 __ br(Assembler::EQ, call_ldc);
340
341 // resolved class - need to call vm to get java mirror of the class
342 __ cmp(r3, (u1)JVM_CONSTANT_Class);
343 __ br(Assembler::NE, notClass);
344
345 __ bind(call_ldc);
346 __ mov(c_rarg1, is_ldc_wide(type) ? 1 : 0);
347 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::ldc), c_rarg1);
348 __ push_ptr(r0);
349 __ verify_oop(r0);
350 __ b(Done);
351
352 __ bind(notClass);
353 __ cmp(r3, (u1)JVM_CONSTANT_Float);
354 __ br(Assembler::NE, notFloat);
355 // ftos
356 __ adds(r1, r2, r1, Assembler::LSL, 3);
357 __ ldrs(v0, Address(r1, base_offset));
358 __ push_f();
359 __ b(Done);
360
361 __ bind(notFloat);
362
363 __ cmp(r3, (u1)JVM_CONSTANT_Integer);
364 __ br(Assembler::NE, notInt);
365
366 // itos
367 __ adds(r1, r2, r1, Assembler::LSL, 3);
368 __ ldrw(r0, Address(r1, base_offset));
369 __ push_i(r0);
370 __ b(Done);
371
372 __ bind(notInt);
373 condy_helper(Done);
374
375 __ bind(Done);
376 }
377
378 // Fast path for caching oop constants.
379 void TemplateTable::fast_aldc(LdcType type)
380 {
381 transition(vtos, atos);
382
383 Register result = r0;
384 Register tmp = r1;
385 Register rarg = r2;
386
387 int index_size = is_ldc_wide(type) ? sizeof(u2) : sizeof(u1);
388
389 Label resolved;
390
391 // We are resolved if the resolved reference cache entry contains a
392 // non-null object (String, MethodType, etc.)
393 assert_different_registers(result, tmp);
394 __ get_cache_index_at_bcp(tmp, 1, index_size);
395 __ load_resolved_reference_at_index(result, tmp);
396 __ cbnz(result, resolved);
397
398 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc);
399
400 // first time invocation - must resolve first
401 __ mov(rarg, (int)bytecode());
402 __ call_VM(result, entry, rarg);
403
404 __ bind(resolved);
405
406 { // Check for the null sentinel.
407 // If we just called the VM, it already did the mapping for us,
408 // but it's harmless to retry.
409 Label notNull;
410
411 // Stash null_sentinel address to get its value later
412 __ movptr(rarg, (uintptr_t)Universe::the_null_sentinel_addr());
413 __ ldr(tmp, Address(rarg));
414 __ resolve_oop_handle(tmp, r5, rscratch2);
415 __ cmpoop(result, tmp);
416 __ br(Assembler::NE, notNull);
417 __ mov(result, 0); // NULL object reference
418 __ bind(notNull);
419 }
420
421 if (VerifyOops) {
422 // Safe to call with 0 result
423 __ verify_oop(result);
424 }
425 }
426
427 void TemplateTable::ldc2_w()
428 {
429 transition(vtos, vtos);
430 Label notDouble, notLong, Done;
431 __ get_unsigned_2_byte_index_at_bcp(r0, 1);
432
433 __ get_cpool_and_tags(r1, r2);
434 const int base_offset = ConstantPool::header_size() * wordSize;
435 const int tags_offset = Array<u1>::base_offset_in_bytes();
436
437 // get type
438 __ lea(r2, Address(r2, r0, Address::lsl(0)));
439 __ load_unsigned_byte(r2, Address(r2, tags_offset));
440 __ cmpw(r2, (int)JVM_CONSTANT_Double);
441 __ br(Assembler::NE, notDouble);
442
443 // dtos
444 __ lea (r2, Address(r1, r0, Address::lsl(3)));
445 __ ldrd(v0, Address(r2, base_offset));
446 __ push_d();
447 __ b(Done);
448
449 __ bind(notDouble);
450 __ cmpw(r2, (int)JVM_CONSTANT_Long);
451 __ br(Assembler::NE, notLong);
452
453 // ltos
454 __ lea(r0, Address(r1, r0, Address::lsl(3)));
455 __ ldr(r0, Address(r0, base_offset));
456 __ push_l();
457 __ b(Done);
458
459 __ bind(notLong);
460 condy_helper(Done);
461
462 __ bind(Done);
463 }
464
465 void TemplateTable::condy_helper(Label& Done)
466 {
467 Register obj = r0;
468 Register rarg = r1;
469 Register flags = r2;
470 Register off = r3;
471
472 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc);
473
474 __ mov(rarg, (int) bytecode());
475 __ call_VM(obj, entry, rarg);
476
477 __ get_vm_result_2(flags, rthread);
478
479 // VMr = obj = base address to find primitive value to push
480 // VMr2 = flags = (tos, off) using format of CPCE::_flags
481 __ mov(off, flags);
482 __ andw(off, off, ConstantPoolCacheEntry::field_index_mask);
483
484 const Address field(obj, off);
485
486 // What sort of thing are we loading?
487 // x86 uses a shift and mask or wings it with a shift plus assert
488 // the mask is not needed. aarch64 just uses bitfield extract
489 __ ubfxw(flags, flags, ConstantPoolCacheEntry::tos_state_shift,
490 ConstantPoolCacheEntry::tos_state_bits);
491
492 switch (bytecode()) {
493 case Bytecodes::_ldc:
494 case Bytecodes::_ldc_w:
495 {
496 // tos in (itos, ftos, stos, btos, ctos, ztos)
497 Label notInt, notFloat, notShort, notByte, notChar, notBool;
498 __ cmpw(flags, itos);
499 __ br(Assembler::NE, notInt);
500 // itos
501 __ ldrw(r0, field);
502 __ push(itos);
503 __ b(Done);
504
505 __ bind(notInt);
506 __ cmpw(flags, ftos);
507 __ br(Assembler::NE, notFloat);
508 // ftos
509 __ load_float(field);
510 __ push(ftos);
511 __ b(Done);
512
513 __ bind(notFloat);
514 __ cmpw(flags, stos);
515 __ br(Assembler::NE, notShort);
516 // stos
517 __ load_signed_short(r0, field);
518 __ push(stos);
519 __ b(Done);
520
521 __ bind(notShort);
522 __ cmpw(flags, btos);
523 __ br(Assembler::NE, notByte);
524 // btos
525 __ load_signed_byte(r0, field);
526 __ push(btos);
527 __ b(Done);
528
529 __ bind(notByte);
530 __ cmpw(flags, ctos);
531 __ br(Assembler::NE, notChar);
532 // ctos
533 __ load_unsigned_short(r0, field);
534 __ push(ctos);
535 __ b(Done);
536
537 __ bind(notChar);
538 __ cmpw(flags, ztos);
539 __ br(Assembler::NE, notBool);
540 // ztos
541 __ load_signed_byte(r0, field);
542 __ push(ztos);
543 __ b(Done);
544
545 __ bind(notBool);
546 break;
547 }
548
549 case Bytecodes::_ldc2_w:
550 {
551 Label notLong, notDouble;
552 __ cmpw(flags, ltos);
553 __ br(Assembler::NE, notLong);
554 // ltos
555 __ ldr(r0, field);
556 __ push(ltos);
557 __ b(Done);
558
559 __ bind(notLong);
560 __ cmpw(flags, dtos);
561 __ br(Assembler::NE, notDouble);
562 // dtos
563 __ load_double(field);
564 __ push(dtos);
565 __ b(Done);
566
567 __ bind(notDouble);
568 break;
569 }
570
571 default:
572 ShouldNotReachHere();
573 }
574
575 __ stop("bad ldc/condy");
576 }
577
578 void TemplateTable::locals_index(Register reg, int offset)
579 {
580 __ ldrb(reg, at_bcp(offset));
581 __ neg(reg, reg);
582 }
583
584 void TemplateTable::iload() {
585 iload_internal();
586 }
587
588 void TemplateTable::nofast_iload() {
589 iload_internal(may_not_rewrite);
590 }
591
592 void TemplateTable::iload_internal(RewriteControl rc) {
593 transition(vtos, itos);
594 if (RewriteFrequentPairs && rc == may_rewrite) {
595 Label rewrite, done;
596 Register bc = r4;
597
598 // get next bytecode
599 __ load_unsigned_byte(r1, at_bcp(Bytecodes::length_for(Bytecodes::_iload)));
600
601 // if _iload, wait to rewrite to iload2. We only want to rewrite the
602 // last two iloads in a pair. Comparing against fast_iload means that
603 // the next bytecode is neither an iload or a caload, and therefore
604 // an iload pair.
605 __ cmpw(r1, Bytecodes::_iload);
606 __ br(Assembler::EQ, done);
607
608 // if _fast_iload rewrite to _fast_iload2
609 __ cmpw(r1, Bytecodes::_fast_iload);
610 __ movw(bc, Bytecodes::_fast_iload2);
611 __ br(Assembler::EQ, rewrite);
612
613 // if _caload rewrite to _fast_icaload
614 __ cmpw(r1, Bytecodes::_caload);
615 __ movw(bc, Bytecodes::_fast_icaload);
616 __ br(Assembler::EQ, rewrite);
617
618 // else rewrite to _fast_iload
619 __ movw(bc, Bytecodes::_fast_iload);
620
621 // rewrite
622 // bc: new bytecode
623 __ bind(rewrite);
624 patch_bytecode(Bytecodes::_iload, bc, r1, false);
625 __ bind(done);
626
627 }
628
629 // do iload, get the local value into tos
630 locals_index(r1);
631 __ ldr(r0, iaddress(r1));
632
633 }
634
635 void TemplateTable::fast_iload2()
636 {
637 transition(vtos, itos);
638 locals_index(r1);
639 __ ldr(r0, iaddress(r1));
640 __ push(itos);
641 locals_index(r1, 3);
642 __ ldr(r0, iaddress(r1));
643 }
644
645 void TemplateTable::fast_iload()
646 {
647 transition(vtos, itos);
648 locals_index(r1);
649 __ ldr(r0, iaddress(r1));
650 }
651
652 void TemplateTable::lload()
653 {
654 transition(vtos, ltos);
655 __ ldrb(r1, at_bcp(1));
656 __ sub(r1, rlocals, r1, ext::uxtw, LogBytesPerWord);
657 __ ldr(r0, Address(r1, Interpreter::local_offset_in_bytes(1)));
658 }
659
660 void TemplateTable::fload()
661 {
662 transition(vtos, ftos);
663 locals_index(r1);
664 // n.b. we use ldrd here because this is a 64 bit slot
665 // this is comparable to the iload case
666 __ ldrd(v0, faddress(r1));
667 }
668
669 void TemplateTable::dload()
670 {
671 transition(vtos, dtos);
672 __ ldrb(r1, at_bcp(1));
673 __ sub(r1, rlocals, r1, ext::uxtw, LogBytesPerWord);
674 __ ldrd(v0, Address(r1, Interpreter::local_offset_in_bytes(1)));
675 }
676
677 void TemplateTable::aload()
678 {
679 transition(vtos, atos);
680 locals_index(r1);
681 __ ldr(r0, iaddress(r1));
682 }
683
684 void TemplateTable::locals_index_wide(Register reg) {
685 __ ldrh(reg, at_bcp(2));
686 __ rev16w(reg, reg);
687 __ neg(reg, reg);
688 }
689
690 void TemplateTable::wide_iload() {
691 transition(vtos, itos);
692 locals_index_wide(r1);
693 __ ldr(r0, iaddress(r1));
694 }
695
696 void TemplateTable::wide_lload()
697 {
698 transition(vtos, ltos);
699 __ ldrh(r1, at_bcp(2));
700 __ rev16w(r1, r1);
701 __ sub(r1, rlocals, r1, ext::uxtw, LogBytesPerWord);
702 __ ldr(r0, Address(r1, Interpreter::local_offset_in_bytes(1)));
703 }
704
705 void TemplateTable::wide_fload()
706 {
707 transition(vtos, ftos);
708 locals_index_wide(r1);
709 // n.b. we use ldrd here because this is a 64 bit slot
710 // this is comparable to the iload case
711 __ ldrd(v0, faddress(r1));
712 }
713
714 void TemplateTable::wide_dload()
715 {
716 transition(vtos, dtos);
717 __ ldrh(r1, at_bcp(2));
718 __ rev16w(r1, r1);
719 __ sub(r1, rlocals, r1, ext::uxtw, LogBytesPerWord);
720 __ ldrd(v0, Address(r1, Interpreter::local_offset_in_bytes(1)));
721 }
722
723 void TemplateTable::wide_aload()
724 {
725 transition(vtos, atos);
726 locals_index_wide(r1);
727 __ ldr(r0, aaddress(r1));
728 }
729
730 void TemplateTable::index_check(Register array, Register index)
731 {
732 // destroys r1, rscratch1
733 // check array
734 __ null_check(array, arrayOopDesc::length_offset_in_bytes());
735 // sign extend index for use by indexed load
736 // __ movl2ptr(index, index);
737 // check index
738 Register length = rscratch1;
739 __ ldrw(length, Address(array, arrayOopDesc::length_offset_in_bytes()));
740 __ cmpw(index, length);
741 if (index != r1) {
742 // ??? convention: move aberrant index into r1 for exception message
743 assert(r1 != array, "different registers");
744 __ mov(r1, index);
745 }
746 Label ok;
747 __ br(Assembler::LO, ok);
748 // ??? convention: move array into r3 for exception message
749 __ mov(r3, array);
750 __ mov(rscratch1, Interpreter::_throw_ArrayIndexOutOfBoundsException_entry);
751 __ br(rscratch1);
752 __ bind(ok);
753 }
754
755 void TemplateTable::iaload()
756 {
757 transition(itos, itos);
758 __ mov(r1, r0);
759 __ pop_ptr(r0);
760 // r0: array
761 // r1: index
762 index_check(r0, r1); // leaves index in r1, kills rscratch1
763 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_INT) >> 2);
764 __ access_load_at(T_INT, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(2)), noreg, noreg);
765 }
766
767 void TemplateTable::laload()
768 {
769 transition(itos, ltos);
770 __ mov(r1, r0);
771 __ pop_ptr(r0);
772 // r0: array
773 // r1: index
774 index_check(r0, r1); // leaves index in r1, kills rscratch1
775 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_LONG) >> 3);
776 __ access_load_at(T_LONG, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(3)), noreg, noreg);
777 }
778
779 void TemplateTable::faload()
780 {
781 transition(itos, ftos);
782 __ mov(r1, r0);
783 __ pop_ptr(r0);
784 // r0: array
785 // r1: index
786 index_check(r0, r1); // leaves index in r1, kills rscratch1
787 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_FLOAT) >> 2);
788 __ access_load_at(T_FLOAT, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(2)), noreg, noreg);
789 }
790
791 void TemplateTable::daload()
792 {
793 transition(itos, dtos);
794 __ mov(r1, r0);
795 __ pop_ptr(r0);
796 // r0: array
797 // r1: index
798 index_check(r0, r1); // leaves index in r1, kills rscratch1
799 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_DOUBLE) >> 3);
800 __ access_load_at(T_DOUBLE, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(3)), noreg, noreg);
801 }
802
803 void TemplateTable::aaload()
804 {
805 transition(itos, atos);
806 __ mov(r1, r0);
807 __ pop_ptr(r0);
808 // r0: array
809 // r1: index
810 index_check(r0, r1); // leaves index in r1, kills rscratch1
811 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_OBJECT) >> LogBytesPerHeapOop);
812 do_oop_load(_masm,
813 Address(r0, r1, Address::uxtw(LogBytesPerHeapOop)),
814 r0,
815 IS_ARRAY);
816 }
817
818 void TemplateTable::baload()
819 {
820 transition(itos, itos);
821 __ mov(r1, r0);
822 __ pop_ptr(r0);
823 // r0: array
824 // r1: index
825 index_check(r0, r1); // leaves index in r1, kills rscratch1
826 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_BYTE) >> 0);
827 __ access_load_at(T_BYTE, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(0)), noreg, noreg);
828 }
829
830 void TemplateTable::caload()
831 {
832 transition(itos, itos);
833 __ mov(r1, r0);
834 __ pop_ptr(r0);
835 // r0: array
836 // r1: index
837 index_check(r0, r1); // leaves index in r1, kills rscratch1
838 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_CHAR) >> 1);
839 __ access_load_at(T_CHAR, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(1)), noreg, noreg);
840 }
841
842 // iload followed by caload frequent pair
843 void TemplateTable::fast_icaload()
844 {
845 transition(vtos, itos);
846 // load index out of locals
847 locals_index(r2);
848 __ ldr(r1, iaddress(r2));
849
850 __ pop_ptr(r0);
851
852 // r0: array
853 // r1: index
854 index_check(r0, r1); // leaves index in r1, kills rscratch1
855 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_CHAR) >> 1);
856 __ access_load_at(T_CHAR, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(1)), noreg, noreg);
857 }
858
859 void TemplateTable::saload()
860 {
861 transition(itos, itos);
862 __ mov(r1, r0);
863 __ pop_ptr(r0);
864 // r0: array
865 // r1: index
866 index_check(r0, r1); // leaves index in r1, kills rscratch1
867 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_SHORT) >> 1);
868 __ access_load_at(T_SHORT, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(1)), noreg, noreg);
869 }
870
871 void TemplateTable::iload(int n)
872 {
873 transition(vtos, itos);
874 __ ldr(r0, iaddress(n));
875 }
876
877 void TemplateTable::lload(int n)
878 {
879 transition(vtos, ltos);
880 __ ldr(r0, laddress(n));
881 }
882
883 void TemplateTable::fload(int n)
884 {
885 transition(vtos, ftos);
886 __ ldrs(v0, faddress(n));
887 }
888
889 void TemplateTable::dload(int n)
890 {
891 transition(vtos, dtos);
892 __ ldrd(v0, daddress(n));
893 }
894
895 void TemplateTable::aload(int n)
896 {
897 transition(vtos, atos);
898 __ ldr(r0, iaddress(n));
899 }
900
901 void TemplateTable::aload_0() {
902 aload_0_internal();
903 }
904
905 void TemplateTable::nofast_aload_0() {
906 aload_0_internal(may_not_rewrite);
907 }
908
909 void TemplateTable::aload_0_internal(RewriteControl rc) {
910 // According to bytecode histograms, the pairs:
911 //
912 // _aload_0, _fast_igetfield
913 // _aload_0, _fast_agetfield
914 // _aload_0, _fast_fgetfield
915 //
916 // occur frequently. If RewriteFrequentPairs is set, the (slow)
917 // _aload_0 bytecode checks if the next bytecode is either
918 // _fast_igetfield, _fast_agetfield or _fast_fgetfield and then
919 // rewrites the current bytecode into a pair bytecode; otherwise it
920 // rewrites the current bytecode into _fast_aload_0 that doesn't do
921 // the pair check anymore.
922 //
923 // Note: If the next bytecode is _getfield, the rewrite must be
924 // delayed, otherwise we may miss an opportunity for a pair.
925 //
926 // Also rewrite frequent pairs
927 // aload_0, aload_1
928 // aload_0, iload_1
929 // These bytecodes with a small amount of code are most profitable
930 // to rewrite
931 if (RewriteFrequentPairs && rc == may_rewrite) {
932 Label rewrite, done;
933 const Register bc = r4;
934
935 // get next bytecode
936 __ load_unsigned_byte(r1, at_bcp(Bytecodes::length_for(Bytecodes::_aload_0)));
937
938 // if _getfield then wait with rewrite
939 __ cmpw(r1, Bytecodes::Bytecodes::_getfield);
940 __ br(Assembler::EQ, done);
941
942 // if _igetfield then rewrite to _fast_iaccess_0
943 assert(Bytecodes::java_code(Bytecodes::_fast_iaccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
944 __ cmpw(r1, Bytecodes::_fast_igetfield);
945 __ movw(bc, Bytecodes::_fast_iaccess_0);
946 __ br(Assembler::EQ, rewrite);
947
948 // if _agetfield then rewrite to _fast_aaccess_0
949 assert(Bytecodes::java_code(Bytecodes::_fast_aaccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
950 __ cmpw(r1, Bytecodes::_fast_agetfield);
951 __ movw(bc, Bytecodes::_fast_aaccess_0);
952 __ br(Assembler::EQ, rewrite);
953
954 // if _fgetfield then rewrite to _fast_faccess_0
955 assert(Bytecodes::java_code(Bytecodes::_fast_faccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
956 __ cmpw(r1, Bytecodes::_fast_fgetfield);
957 __ movw(bc, Bytecodes::_fast_faccess_0);
958 __ br(Assembler::EQ, rewrite);
959
960 // else rewrite to _fast_aload0
961 assert(Bytecodes::java_code(Bytecodes::_fast_aload_0) == Bytecodes::_aload_0, "fix bytecode definition");
962 __ movw(bc, Bytecodes::Bytecodes::_fast_aload_0);
963
964 // rewrite
965 // bc: new bytecode
966 __ bind(rewrite);
967 patch_bytecode(Bytecodes::_aload_0, bc, r1, false);
968
969 __ bind(done);
970 }
971
972 // Do actual aload_0 (must do this after patch_bytecode which might call VM and GC might change oop).
973 aload(0);
974 }
975
976 void TemplateTable::istore()
977 {
978 transition(itos, vtos);
979 locals_index(r1);
980 // FIXME: We're being very pernickerty here storing a jint in a
981 // local with strw, which costs an extra instruction over what we'd
982 // be able to do with a simple str. We should just store the whole
983 // word.
984 __ lea(rscratch1, iaddress(r1));
985 __ strw(r0, Address(rscratch1));
986 }
987
988 void TemplateTable::lstore()
989 {
990 transition(ltos, vtos);
991 locals_index(r1);
992 __ str(r0, laddress(r1, rscratch1, _masm));
993 }
994
995 void TemplateTable::fstore() {
996 transition(ftos, vtos);
997 locals_index(r1);
998 __ lea(rscratch1, iaddress(r1));
999 __ strs(v0, Address(rscratch1));
1000 }
1001
1002 void TemplateTable::dstore() {
1003 transition(dtos, vtos);
1004 locals_index(r1);
1005 __ strd(v0, daddress(r1, rscratch1, _masm));
1006 }
1007
1008 void TemplateTable::astore()
1009 {
1010 transition(vtos, vtos);
1011 __ pop_ptr(r0);
1012 locals_index(r1);
1013 __ str(r0, aaddress(r1));
1014 }
1015
1016 void TemplateTable::wide_istore() {
1017 transition(vtos, vtos);
1018 __ pop_i();
1019 locals_index_wide(r1);
1020 __ lea(rscratch1, iaddress(r1));
1021 __ strw(r0, Address(rscratch1));
1022 }
1023
1024 void TemplateTable::wide_lstore() {
1025 transition(vtos, vtos);
1026 __ pop_l();
1027 locals_index_wide(r1);
1028 __ str(r0, laddress(r1, rscratch1, _masm));
1029 }
1030
1031 void TemplateTable::wide_fstore() {
1032 transition(vtos, vtos);
1033 __ pop_f();
1034 locals_index_wide(r1);
1035 __ lea(rscratch1, faddress(r1));
1036 __ strs(v0, rscratch1);
1037 }
1038
1039 void TemplateTable::wide_dstore() {
1040 transition(vtos, vtos);
1041 __ pop_d();
1042 locals_index_wide(r1);
1043 __ strd(v0, daddress(r1, rscratch1, _masm));
1044 }
1045
1046 void TemplateTable::wide_astore() {
1047 transition(vtos, vtos);
1048 __ pop_ptr(r0);
1049 locals_index_wide(r1);
1050 __ str(r0, aaddress(r1));
1051 }
1052
1053 void TemplateTable::iastore() {
1054 transition(itos, vtos);
1055 __ pop_i(r1);
1056 __ pop_ptr(r3);
1057 // r0: value
1058 // r1: index
1059 // r3: array
1060 index_check(r3, r1); // prefer index in r1
1061 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_INT) >> 2);
1062 __ access_store_at(T_INT, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(2)), r0, noreg, noreg, noreg);
1063 }
1064
1065 void TemplateTable::lastore() {
1066 transition(ltos, vtos);
1067 __ pop_i(r1);
1068 __ pop_ptr(r3);
1069 // r0: value
1070 // r1: index
1071 // r3: array
1072 index_check(r3, r1); // prefer index in r1
1073 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_LONG) >> 3);
1074 __ access_store_at(T_LONG, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(3)), r0, noreg, noreg, noreg);
1075 }
1076
1077 void TemplateTable::fastore() {
1078 transition(ftos, vtos);
1079 __ pop_i(r1);
1080 __ pop_ptr(r3);
1081 // v0: value
1082 // r1: index
1083 // r3: array
1084 index_check(r3, r1); // prefer index in r1
1085 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_FLOAT) >> 2);
1086 __ access_store_at(T_FLOAT, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(2)), noreg /* ftos */, noreg, noreg, noreg);
1087 }
1088
1089 void TemplateTable::dastore() {
1090 transition(dtos, vtos);
1091 __ pop_i(r1);
1092 __ pop_ptr(r3);
1093 // v0: value
1094 // r1: index
1095 // r3: array
1096 index_check(r3, r1); // prefer index in r1
1097 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_DOUBLE) >> 3);
1098 __ access_store_at(T_DOUBLE, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(3)), noreg /* dtos */, noreg, noreg, noreg);
1099 }
1100
1101 void TemplateTable::aastore() {
1102 Label is_null, ok_is_subtype, done;
1103 transition(vtos, vtos);
1104 // stack: ..., array, index, value
1105 __ ldr(r0, at_tos()); // value
1106 __ ldr(r2, at_tos_p1()); // index
1107 __ ldr(r3, at_tos_p2()); // array
1108
1109 Address element_address(r3, r4, Address::uxtw(LogBytesPerHeapOop));
1110
1111 index_check(r3, r2); // kills r1
1112 __ add(r4, r2, arrayOopDesc::base_offset_in_bytes(T_OBJECT) >> LogBytesPerHeapOop);
1113
1114 // do array store check - check for NULL value first
1115 __ cbz(r0, is_null);
1116
1117 // Move subklass into r1
1118 __ load_klass(r1, r0);
1119 // Move superklass into r0
1120 __ load_klass(r0, r3);
1121 __ ldr(r0, Address(r0,
1122 ObjArrayKlass::element_klass_offset()));
1123 // Compress array + index*oopSize + 12 into a single register. Frees r2.
1124
1125 // Generate subtype check. Blows r2, r5
1126 // Superklass in r0. Subklass in r1.
1127 __ gen_subtype_check(r1, ok_is_subtype);
1128
1129 // Come here on failure
1130 // object is at TOS
1131 __ b(Interpreter::_throw_ArrayStoreException_entry);
1132
1133 // Come here on success
1134 __ bind(ok_is_subtype);
1135
1136 // Get the value we will store
1137 __ ldr(r0, at_tos());
1138 // Now store using the appropriate barrier
1139 do_oop_store(_masm, element_address, r0, IS_ARRAY);
1140 __ b(done);
1141
1142 // Have a NULL in r0, r3=array, r2=index. Store NULL at ary[idx]
1143 __ bind(is_null);
1144 __ profile_null_seen(r2);
1145
1146 // Store a NULL
1147 do_oop_store(_masm, element_address, noreg, IS_ARRAY);
1148
1149 // Pop stack arguments
1150 __ bind(done);
1151 __ add(esp, esp, 3 * Interpreter::stackElementSize);
1152 }
1153
1154 void TemplateTable::bastore()
1155 {
1156 transition(itos, vtos);
1157 __ pop_i(r1);
1158 __ pop_ptr(r3);
1159 // r0: value
1160 // r1: index
1161 // r3: array
1162 index_check(r3, r1); // prefer index in r1
1163
1164 // Need to check whether array is boolean or byte
1165 // since both types share the bastore bytecode.
1166 __ load_klass(r2, r3);
1167 __ ldrw(r2, Address(r2, Klass::layout_helper_offset()));
1168 int diffbit_index = exact_log2(Klass::layout_helper_boolean_diffbit());
1169 Label L_skip;
1170 __ tbz(r2, diffbit_index, L_skip);
1171 __ andw(r0, r0, 1); // if it is a T_BOOLEAN array, mask the stored value to 0/1
1172 __ bind(L_skip);
1173
1174 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_BYTE) >> 0);
1175 __ access_store_at(T_BYTE, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(0)), r0, noreg, noreg, noreg);
1176 }
1177
1178 void TemplateTable::castore()
1179 {
1180 transition(itos, vtos);
1181 __ pop_i(r1);
1182 __ pop_ptr(r3);
1183 // r0: value
1184 // r1: index
1185 // r3: array
1186 index_check(r3, r1); // prefer index in r1
1187 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_CHAR) >> 1);
1188 __ access_store_at(T_CHAR, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(1)), r0, noreg, noreg, noreg);
1189 }
1190
1191 void TemplateTable::sastore()
1192 {
1193 castore();
1194 }
1195
1196 void TemplateTable::istore(int n)
1197 {
1198 transition(itos, vtos);
1199 __ str(r0, iaddress(n));
1200 }
1201
1202 void TemplateTable::lstore(int n)
1203 {
1204 transition(ltos, vtos);
1205 __ str(r0, laddress(n));
1206 }
1207
1208 void TemplateTable::fstore(int n)
1209 {
1210 transition(ftos, vtos);
1211 __ strs(v0, faddress(n));
1212 }
1213
1214 void TemplateTable::dstore(int n)
1215 {
1216 transition(dtos, vtos);
1217 __ strd(v0, daddress(n));
1218 }
1219
1220 void TemplateTable::astore(int n)
1221 {
1222 transition(vtos, vtos);
1223 __ pop_ptr(r0);
1224 __ str(r0, iaddress(n));
1225 }
1226
1227 void TemplateTable::pop()
1228 {
1229 transition(vtos, vtos);
1230 __ add(esp, esp, Interpreter::stackElementSize);
1231 }
1232
1233 void TemplateTable::pop2()
1234 {
1235 transition(vtos, vtos);
1236 __ add(esp, esp, 2 * Interpreter::stackElementSize);
1237 }
1238
1239 void TemplateTable::dup()
1240 {
1241 transition(vtos, vtos);
1242 __ ldr(r0, Address(esp, 0));
1243 __ push(r0);
1244 // stack: ..., a, a
1245 }
1246
1247 void TemplateTable::dup_x1()
1248 {
1249 transition(vtos, vtos);
1250 // stack: ..., a, b
1251 __ ldr(r0, at_tos()); // load b
1252 __ ldr(r2, at_tos_p1()); // load a
1253 __ str(r0, at_tos_p1()); // store b
1254 __ str(r2, at_tos()); // store a
1255 __ push(r0); // push b
1256 // stack: ..., b, a, b
1257 }
1258
1259 void TemplateTable::dup_x2()
1260 {
1261 transition(vtos, vtos);
1262 // stack: ..., a, b, c
1263 __ ldr(r0, at_tos()); // load c
1264 __ ldr(r2, at_tos_p2()); // load a
1265 __ str(r0, at_tos_p2()); // store c in a
1266 __ push(r0); // push c
1267 // stack: ..., c, b, c, c
1268 __ ldr(r0, at_tos_p2()); // load b
1269 __ str(r2, at_tos_p2()); // store a in b
1270 // stack: ..., c, a, c, c
1271 __ str(r0, at_tos_p1()); // store b in c
1272 // stack: ..., c, a, b, c
1273 }
1274
1275 void TemplateTable::dup2()
1276 {
1277 transition(vtos, vtos);
1278 // stack: ..., a, b
1279 __ ldr(r0, at_tos_p1()); // load a
1280 __ push(r0); // push a
1281 __ ldr(r0, at_tos_p1()); // load b
1282 __ push(r0); // push b
1283 // stack: ..., a, b, a, b
1284 }
1285
1286 void TemplateTable::dup2_x1()
1287 {
1288 transition(vtos, vtos);
1289 // stack: ..., a, b, c
1290 __ ldr(r2, at_tos()); // load c
1291 __ ldr(r0, at_tos_p1()); // load b
1292 __ push(r0); // push b
1293 __ push(r2); // push c
1294 // stack: ..., a, b, c, b, c
1295 __ str(r2, at_tos_p3()); // store c in b
1296 // stack: ..., a, c, c, b, c
1297 __ ldr(r2, at_tos_p4()); // load a
1298 __ str(r2, at_tos_p2()); // store a in 2nd c
1299 // stack: ..., a, c, a, b, c
1300 __ str(r0, at_tos_p4()); // store b in a
1301 // stack: ..., b, c, a, b, c
1302 }
1303
1304 void TemplateTable::dup2_x2()
1305 {
1306 transition(vtos, vtos);
1307 // stack: ..., a, b, c, d
1308 __ ldr(r2, at_tos()); // load d
1309 __ ldr(r0, at_tos_p1()); // load c
1310 __ push(r0) ; // push c
1311 __ push(r2); // push d
1312 // stack: ..., a, b, c, d, c, d
1313 __ ldr(r0, at_tos_p4()); // load b
1314 __ str(r0, at_tos_p2()); // store b in d
1315 __ str(r2, at_tos_p4()); // store d in b
1316 // stack: ..., a, d, c, b, c, d
1317 __ ldr(r2, at_tos_p5()); // load a
1318 __ ldr(r0, at_tos_p3()); // load c
1319 __ str(r2, at_tos_p3()); // store a in c
1320 __ str(r0, at_tos_p5()); // store c in a
1321 // stack: ..., c, d, a, b, c, d
1322 }
1323
1324 void TemplateTable::swap()
1325 {
1326 transition(vtos, vtos);
1327 // stack: ..., a, b
1328 __ ldr(r2, at_tos_p1()); // load a
1329 __ ldr(r0, at_tos()); // load b
1330 __ str(r2, at_tos()); // store a in b
1331 __ str(r0, at_tos_p1()); // store b in a
1332 // stack: ..., b, a
1333 }
1334
1335 void TemplateTable::iop2(Operation op)
1336 {
1337 transition(itos, itos);
1338 // r0 <== r1 op r0
1339 __ pop_i(r1);
1340 switch (op) {
1341 case add : __ addw(r0, r1, r0); break;
1342 case sub : __ subw(r0, r1, r0); break;
1343 case mul : __ mulw(r0, r1, r0); break;
1344 case _and : __ andw(r0, r1, r0); break;
1345 case _or : __ orrw(r0, r1, r0); break;
1346 case _xor : __ eorw(r0, r1, r0); break;
1347 case shl : __ lslvw(r0, r1, r0); break;
1348 case shr : __ asrvw(r0, r1, r0); break;
1349 case ushr : __ lsrvw(r0, r1, r0);break;
1350 default : ShouldNotReachHere();
1351 }
1352 }
1353
1354 void TemplateTable::lop2(Operation op)
1355 {
1356 transition(ltos, ltos);
1357 // r0 <== r1 op r0
1358 __ pop_l(r1);
1359 switch (op) {
1360 case add : __ add(r0, r1, r0); break;
1361 case sub : __ sub(r0, r1, r0); break;
1362 case mul : __ mul(r0, r1, r0); break;
1363 case _and : __ andr(r0, r1, r0); break;
1364 case _or : __ orr(r0, r1, r0); break;
1365 case _xor : __ eor(r0, r1, r0); break;
1366 default : ShouldNotReachHere();
1367 }
1368 }
1369
1370 void TemplateTable::idiv()
1371 {
1372 transition(itos, itos);
1373 // explicitly check for div0
1374 Label no_div0;
1375 __ cbnzw(r0, no_div0);
1376 __ mov(rscratch1, Interpreter::_throw_ArithmeticException_entry);
1377 __ br(rscratch1);
1378 __ bind(no_div0);
1379 __ pop_i(r1);
1380 // r0 <== r1 idiv r0
1381 __ corrected_idivl(r0, r1, r0, /* want_remainder */ false);
1382 }
1383
1384 void TemplateTable::irem()
1385 {
1386 transition(itos, itos);
1387 // explicitly check for div0
1388 Label no_div0;
1389 __ cbnzw(r0, no_div0);
1390 __ mov(rscratch1, Interpreter::_throw_ArithmeticException_entry);
1391 __ br(rscratch1);
1392 __ bind(no_div0);
1393 __ pop_i(r1);
1394 // r0 <== r1 irem r0
1395 __ corrected_idivl(r0, r1, r0, /* want_remainder */ true);
1396 }
1397
1398 void TemplateTable::lmul()
1399 {
1400 transition(ltos, ltos);
1401 __ pop_l(r1);
1402 __ mul(r0, r0, r1);
1403 }
1404
1405 void TemplateTable::ldiv()
1406 {
1407 transition(ltos, ltos);
1408 // explicitly check for div0
1409 Label no_div0;
1410 __ cbnz(r0, no_div0);
1411 __ mov(rscratch1, Interpreter::_throw_ArithmeticException_entry);
1412 __ br(rscratch1);
1413 __ bind(no_div0);
1414 __ pop_l(r1);
1415 // r0 <== r1 ldiv r0
1416 __ corrected_idivq(r0, r1, r0, /* want_remainder */ false);
1417 }
1418
1419 void TemplateTable::lrem()
1420 {
1421 transition(ltos, ltos);
1422 // explicitly check for div0
1423 Label no_div0;
1424 __ cbnz(r0, no_div0);
1425 __ mov(rscratch1, Interpreter::_throw_ArithmeticException_entry);
1426 __ br(rscratch1);
1427 __ bind(no_div0);
1428 __ pop_l(r1);
1429 // r0 <== r1 lrem r0
1430 __ corrected_idivq(r0, r1, r0, /* want_remainder */ true);
1431 }
1432
1433 void TemplateTable::lshl()
1434 {
1435 transition(itos, ltos);
1436 // shift count is in r0
1437 __ pop_l(r1);
1438 __ lslv(r0, r1, r0);
1439 }
1440
1441 void TemplateTable::lshr()
1442 {
1443 transition(itos, ltos);
1444 // shift count is in r0
1445 __ pop_l(r1);
1446 __ asrv(r0, r1, r0);
1447 }
1448
1449 void TemplateTable::lushr()
1450 {
1451 transition(itos, ltos);
1452 // shift count is in r0
1453 __ pop_l(r1);
1454 __ lsrv(r0, r1, r0);
1455 }
1456
1457 void TemplateTable::fop2(Operation op)
1458 {
1459 transition(ftos, ftos);
1460 switch (op) {
1461 case add:
1462 // n.b. use ldrd because this is a 64 bit slot
1463 __ pop_f(v1);
1464 __ fadds(v0, v1, v0);
1465 break;
1466 case sub:
1467 __ pop_f(v1);
1468 __ fsubs(v0, v1, v0);
1469 break;
1470 case mul:
1471 __ pop_f(v1);
1472 __ fmuls(v0, v1, v0);
1473 break;
1474 case div:
1475 __ pop_f(v1);
1476 __ fdivs(v0, v1, v0);
1477 break;
1478 case rem:
1479 __ fmovs(v1, v0);
1480 __ pop_f(v0);
1481 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::frem));
1482 break;
1483 default:
1484 ShouldNotReachHere();
1485 break;
1486 }
1487 }
1488
1489 void TemplateTable::dop2(Operation op)
1490 {
1491 transition(dtos, dtos);
1492 switch (op) {
1493 case add:
1494 // n.b. use ldrd because this is a 64 bit slot
1495 __ pop_d(v1);
1496 __ faddd(v0, v1, v0);
1497 break;
1498 case sub:
1499 __ pop_d(v1);
1500 __ fsubd(v0, v1, v0);
1501 break;
1502 case mul:
1503 __ pop_d(v1);
1504 __ fmuld(v0, v1, v0);
1505 break;
1506 case div:
1507 __ pop_d(v1);
1508 __ fdivd(v0, v1, v0);
1509 break;
1510 case rem:
1511 __ fmovd(v1, v0);
1512 __ pop_d(v0);
1513 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::drem));
1514 break;
1515 default:
1516 ShouldNotReachHere();
1517 break;
1518 }
1519 }
1520
1521 void TemplateTable::ineg()
1522 {
1523 transition(itos, itos);
1524 __ negw(r0, r0);
1525
1526 }
1527
1528 void TemplateTable::lneg()
1529 {
1530 transition(ltos, ltos);
1531 __ neg(r0, r0);
1532 }
1533
1534 void TemplateTable::fneg()
1535 {
1536 transition(ftos, ftos);
1537 __ fnegs(v0, v0);
1538 }
1539
1540 void TemplateTable::dneg()
1541 {
1542 transition(dtos, dtos);
1543 __ fnegd(v0, v0);
1544 }
1545
1546 void TemplateTable::iinc()
1547 {
1548 transition(vtos, vtos);
1549 __ load_signed_byte(r1, at_bcp(2)); // get constant
1550 locals_index(r2);
1551 __ ldr(r0, iaddress(r2));
1552 __ addw(r0, r0, r1);
1553 __ str(r0, iaddress(r2));
1554 }
1555
1556 void TemplateTable::wide_iinc()
1557 {
1558 transition(vtos, vtos);
1559 // __ mov(r1, zr);
1560 __ ldrw(r1, at_bcp(2)); // get constant and index
1561 __ rev16(r1, r1);
1562 __ ubfx(r2, r1, 0, 16);
1563 __ neg(r2, r2);
1564 __ sbfx(r1, r1, 16, 16);
1565 __ ldr(r0, iaddress(r2));
1566 __ addw(r0, r0, r1);
1567 __ str(r0, iaddress(r2));
1568 }
1569
1570 void TemplateTable::convert()
1571 {
1572 // Checking
1573 #ifdef ASSERT
1574 {
1575 TosState tos_in = ilgl;
1576 TosState tos_out = ilgl;
1577 switch (bytecode()) {
1578 case Bytecodes::_i2l: // fall through
1579 case Bytecodes::_i2f: // fall through
1580 case Bytecodes::_i2d: // fall through
1581 case Bytecodes::_i2b: // fall through
1582 case Bytecodes::_i2c: // fall through
1583 case Bytecodes::_i2s: tos_in = itos; break;
1584 case Bytecodes::_l2i: // fall through
1585 case Bytecodes::_l2f: // fall through
1586 case Bytecodes::_l2d: tos_in = ltos; break;
1587 case Bytecodes::_f2i: // fall through
1588 case Bytecodes::_f2l: // fall through
1589 case Bytecodes::_f2d: tos_in = ftos; break;
1590 case Bytecodes::_d2i: // fall through
1591 case Bytecodes::_d2l: // fall through
1592 case Bytecodes::_d2f: tos_in = dtos; break;
1593 default : ShouldNotReachHere();
1594 }
1595 switch (bytecode()) {
1596 case Bytecodes::_l2i: // fall through
1597 case Bytecodes::_f2i: // fall through
1598 case Bytecodes::_d2i: // fall through
1599 case Bytecodes::_i2b: // fall through
1600 case Bytecodes::_i2c: // fall through
1601 case Bytecodes::_i2s: tos_out = itos; break;
1602 case Bytecodes::_i2l: // fall through
1603 case Bytecodes::_f2l: // fall through
1604 case Bytecodes::_d2l: tos_out = ltos; break;
1605 case Bytecodes::_i2f: // fall through
1606 case Bytecodes::_l2f: // fall through
1607 case Bytecodes::_d2f: tos_out = ftos; break;
1608 case Bytecodes::_i2d: // fall through
1609 case Bytecodes::_l2d: // fall through
1610 case Bytecodes::_f2d: tos_out = dtos; break;
1611 default : ShouldNotReachHere();
1612 }
1613 transition(tos_in, tos_out);
1614 }
1615 #endif // ASSERT
1616 // static const int64_t is_nan = 0x8000000000000000L;
1617
1618 // Conversion
1619 switch (bytecode()) {
1620 case Bytecodes::_i2l:
1621 __ sxtw(r0, r0);
1622 break;
1623 case Bytecodes::_i2f:
1624 __ scvtfws(v0, r0);
1625 break;
1626 case Bytecodes::_i2d:
1627 __ scvtfwd(v0, r0);
1628 break;
1629 case Bytecodes::_i2b:
1630 __ sxtbw(r0, r0);
1631 break;
1632 case Bytecodes::_i2c:
1633 __ uxthw(r0, r0);
1634 break;
1635 case Bytecodes::_i2s:
1636 __ sxthw(r0, r0);
1637 break;
1638 case Bytecodes::_l2i:
1639 __ uxtw(r0, r0);
1640 break;
1641 case Bytecodes::_l2f:
1642 __ scvtfs(v0, r0);
1643 break;
1644 case Bytecodes::_l2d:
1645 __ scvtfd(v0, r0);
1646 break;
1647 case Bytecodes::_f2i:
1648 {
1649 Label L_Okay;
1650 __ clear_fpsr();
1651 __ fcvtzsw(r0, v0);
1652 __ get_fpsr(r1);
1653 __ cbzw(r1, L_Okay);
1654 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2i));
1655 __ bind(L_Okay);
1656 }
1657 break;
1658 case Bytecodes::_f2l:
1659 {
1660 Label L_Okay;
1661 __ clear_fpsr();
1662 __ fcvtzs(r0, v0);
1663 __ get_fpsr(r1);
1664 __ cbzw(r1, L_Okay);
1665 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2l));
1666 __ bind(L_Okay);
1667 }
1668 break;
1669 case Bytecodes::_f2d:
1670 __ fcvts(v0, v0);
1671 break;
1672 case Bytecodes::_d2i:
1673 {
1674 Label L_Okay;
1675 __ clear_fpsr();
1676 __ fcvtzdw(r0, v0);
1677 __ get_fpsr(r1);
1678 __ cbzw(r1, L_Okay);
1679 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2i));
1680 __ bind(L_Okay);
1681 }
1682 break;
1683 case Bytecodes::_d2l:
1684 {
1685 Label L_Okay;
1686 __ clear_fpsr();
1687 __ fcvtzd(r0, v0);
1688 __ get_fpsr(r1);
1689 __ cbzw(r1, L_Okay);
1690 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2l));
1691 __ bind(L_Okay);
1692 }
1693 break;
1694 case Bytecodes::_d2f:
1695 __ fcvtd(v0, v0);
1696 break;
1697 default:
1698 ShouldNotReachHere();
1699 }
1700 }
1701
1702 void TemplateTable::lcmp()
1703 {
1704 transition(ltos, itos);
1705 Label done;
1706 __ pop_l(r1);
1707 __ cmp(r1, r0);
1708 __ mov(r0, (uint64_t)-1L);
1709 __ br(Assembler::LT, done);
1710 // __ mov(r0, 1UL);
1711 // __ csel(r0, r0, zr, Assembler::NE);
1712 // and here is a faster way
1713 __ csinc(r0, zr, zr, Assembler::EQ);
1714 __ bind(done);
1715 }
1716
1717 void TemplateTable::float_cmp(bool is_float, int unordered_result)
1718 {
1719 Label done;
1720 if (is_float) {
1721 // XXX get rid of pop here, use ... reg, mem32
1722 __ pop_f(v1);
1723 __ fcmps(v1, v0);
1724 } else {
1725 // XXX get rid of pop here, use ... reg, mem64
1726 __ pop_d(v1);
1727 __ fcmpd(v1, v0);
1728 }
1729 if (unordered_result < 0) {
1730 // we want -1 for unordered or less than, 0 for equal and 1 for
1731 // greater than.
1732 __ mov(r0, (uint64_t)-1L);
1733 // for FP LT tests less than or unordered
1734 __ br(Assembler::LT, done);
1735 // install 0 for EQ otherwise 1
1736 __ csinc(r0, zr, zr, Assembler::EQ);
1737 } else {
1738 // we want -1 for less than, 0 for equal and 1 for unordered or
1739 // greater than.
1740 __ mov(r0, 1L);
1741 // for FP HI tests greater than or unordered
1742 __ br(Assembler::HI, done);
1743 // install 0 for EQ otherwise ~0
1744 __ csinv(r0, zr, zr, Assembler::EQ);
1745
1746 }
1747 __ bind(done);
1748 }
1749
1750 void TemplateTable::branch(bool is_jsr, bool is_wide)
1751 {
1752 // We might be moving to a safepoint. The thread which calls
1753 // Interpreter::notice_safepoints() will effectively flush its cache
1754 // when it makes a system call, but we need to do something to
1755 // ensure that we see the changed dispatch table.
1756 __ membar(MacroAssembler::LoadLoad);
1757
1758 __ profile_taken_branch(r0, r1);
1759 const ByteSize be_offset = MethodCounters::backedge_counter_offset() +
1760 InvocationCounter::counter_offset();
1761 const ByteSize inv_offset = MethodCounters::invocation_counter_offset() +
1762 InvocationCounter::counter_offset();
1763
1764 // load branch displacement
1765 if (!is_wide) {
1766 __ ldrh(r2, at_bcp(1));
1767 __ rev16(r2, r2);
1768 // sign extend the 16 bit value in r2
1769 __ sbfm(r2, r2, 0, 15);
1770 } else {
1771 __ ldrw(r2, at_bcp(1));
1772 __ revw(r2, r2);
1773 // sign extend the 32 bit value in r2
1774 __ sbfm(r2, r2, 0, 31);
1775 }
1776
1777 // Handle all the JSR stuff here, then exit.
1778 // It's much shorter and cleaner than intermingling with the non-JSR
1779 // normal-branch stuff occurring below.
1780
1781 if (is_jsr) {
1782 // Pre-load the next target bytecode into rscratch1
1783 __ load_unsigned_byte(rscratch1, Address(rbcp, r2));
1784 // compute return address as bci
1785 __ ldr(rscratch2, Address(rmethod, Method::const_offset()));
1786 __ add(rscratch2, rscratch2,
1787 in_bytes(ConstMethod::codes_offset()) - (is_wide ? 5 : 3));
1788 __ sub(r1, rbcp, rscratch2);
1789 __ push_i(r1);
1790 // Adjust the bcp by the 16-bit displacement in r2
1791 __ add(rbcp, rbcp, r2);
1792 __ dispatch_only(vtos, /*generate_poll*/true);
1793 return;
1794 }
1795
1796 // Normal (non-jsr) branch handling
1797
1798 // Adjust the bcp by the displacement in r2
1799 __ add(rbcp, rbcp, r2);
1800
1801 assert(UseLoopCounter || !UseOnStackReplacement,
1802 "on-stack-replacement requires loop counters");
1803 Label backedge_counter_overflow;
1804 Label dispatch;
1805 if (UseLoopCounter) {
1806 // increment backedge counter for backward branches
1807 // r0: MDO
1808 // w1: MDO bumped taken-count
1809 // r2: target offset
1810 __ cmp(r2, zr);
1811 __ br(Assembler::GT, dispatch); // count only if backward branch
1812
1813 // ECN: FIXME: This code smells
1814 // check if MethodCounters exists
1815 Label has_counters;
1816 __ ldr(rscratch1, Address(rmethod, Method::method_counters_offset()));
1817 __ cbnz(rscratch1, has_counters);
1818 __ push(r0);
1819 __ push(r1);
1820 __ push(r2);
1821 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
1822 InterpreterRuntime::build_method_counters), rmethod);
1823 __ pop(r2);
1824 __ pop(r1);
1825 __ pop(r0);
1826 __ ldr(rscratch1, Address(rmethod, Method::method_counters_offset()));
1827 __ cbz(rscratch1, dispatch); // No MethodCounters allocated, OutOfMemory
1828 __ bind(has_counters);
1829
1830 Label no_mdo;
1831 int increment = InvocationCounter::count_increment;
1832 if (ProfileInterpreter) {
1833 // Are we profiling?
1834 __ ldr(r1, Address(rmethod, in_bytes(Method::method_data_offset())));
1835 __ cbz(r1, no_mdo);
1836 // Increment the MDO backedge counter
1837 const Address mdo_backedge_counter(r1, in_bytes(MethodData::backedge_counter_offset()) +
1838 in_bytes(InvocationCounter::counter_offset()));
1839 const Address mask(r1, in_bytes(MethodData::backedge_mask_offset()));
1840 __ increment_mask_and_jump(mdo_backedge_counter, increment, mask,
1841 r0, rscratch1, false, Assembler::EQ,
1842 UseOnStackReplacement ? &backedge_counter_overflow : &dispatch);
1843 __ b(dispatch);
1844 }
1845 __ bind(no_mdo);
1846 // Increment backedge counter in MethodCounters*
1847 __ ldr(rscratch1, Address(rmethod, Method::method_counters_offset()));
1848 const Address mask(rscratch1, in_bytes(MethodCounters::backedge_mask_offset()));
1849 __ increment_mask_and_jump(Address(rscratch1, be_offset), increment, mask,
1850 r0, rscratch2, false, Assembler::EQ,
1851 UseOnStackReplacement ? &backedge_counter_overflow : &dispatch);
1852 __ bind(dispatch);
1853 }
1854
1855 // Pre-load the next target bytecode into rscratch1
1856 __ load_unsigned_byte(rscratch1, Address(rbcp, 0));
1857
1858 // continue with the bytecode @ target
1859 // rscratch1: target bytecode
1860 // rbcp: target bcp
1861 __ dispatch_only(vtos, /*generate_poll*/true);
1862
1863 if (UseLoopCounter && UseOnStackReplacement) {
1864 // invocation counter overflow
1865 __ bind(backedge_counter_overflow);
1866 __ neg(r2, r2);
1867 __ add(r2, r2, rbcp); // branch bcp
1868 // IcoResult frequency_counter_overflow([JavaThread*], address branch_bcp)
1869 __ call_VM(noreg,
1870 CAST_FROM_FN_PTR(address,
1871 InterpreterRuntime::frequency_counter_overflow),
1872 r2);
1873 __ load_unsigned_byte(r1, Address(rbcp, 0)); // restore target bytecode
1874
1875 // r0: osr nmethod (osr ok) or NULL (osr not possible)
1876 // w1: target bytecode
1877 // r2: scratch
1878 __ cbz(r0, dispatch); // test result -- no osr if null
1879 // nmethod may have been invalidated (VM may block upon call_VM return)
1880 __ ldrb(r2, Address(r0, nmethod::state_offset()));
1881 if (nmethod::in_use != 0)
1882 __ sub(r2, r2, nmethod::in_use);
1883 __ cbnz(r2, dispatch);
1884
1885 // We have the address of an on stack replacement routine in r0
1886 // We need to prepare to execute the OSR method. First we must
1887 // migrate the locals and monitors off of the stack.
1888
1889 __ mov(r19, r0); // save the nmethod
1890
1891 call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_begin));
1892
1893 // r0 is OSR buffer, move it to expected parameter location
1894 __ mov(j_rarg0, r0);
1895
1896 // remove activation
1897 // get sender esp
1898 __ ldr(esp,
1899 Address(rfp, frame::interpreter_frame_sender_sp_offset * wordSize));
1900 // remove frame anchor
1901 __ leave();
1902 // Ensure compiled code always sees stack at proper alignment
1903 __ andr(sp, esp, -16);
1904
1905 // and begin the OSR nmethod
1906 __ ldr(rscratch1, Address(r19, nmethod::osr_entry_point_offset()));
1907 __ br(rscratch1);
1908 }
1909 }
1910
1911
1912 void TemplateTable::if_0cmp(Condition cc)
1913 {
1914 transition(itos, vtos);
1915 // assume branch is more often taken than not (loops use backward branches)
1916 Label not_taken;
1917 if (cc == equal)
1918 __ cbnzw(r0, not_taken);
1919 else if (cc == not_equal)
1920 __ cbzw(r0, not_taken);
1921 else {
1922 __ andsw(zr, r0, r0);
1923 __ br(j_not(cc), not_taken);
1924 }
1925
1926 branch(false, false);
1927 __ bind(not_taken);
1928 __ profile_not_taken_branch(r0);
1929 }
1930
1931 void TemplateTable::if_icmp(Condition cc)
1932 {
1933 transition(itos, vtos);
1934 // assume branch is more often taken than not (loops use backward branches)
1935 Label not_taken;
1936 __ pop_i(r1);
1937 __ cmpw(r1, r0, Assembler::LSL);
1938 __ br(j_not(cc), not_taken);
1939 branch(false, false);
1940 __ bind(not_taken);
1941 __ profile_not_taken_branch(r0);
1942 }
1943
1944 void TemplateTable::if_nullcmp(Condition cc)
1945 {
1946 transition(atos, vtos);
1947 // assume branch is more often taken than not (loops use backward branches)
1948 Label not_taken;
1949 if (cc == equal)
1950 __ cbnz(r0, not_taken);
1951 else
1952 __ cbz(r0, not_taken);
1953 branch(false, false);
1954 __ bind(not_taken);
1955 __ profile_not_taken_branch(r0);
1956 }
1957
1958 void TemplateTable::if_acmp(Condition cc)
1959 {
1960 transition(atos, vtos);
1961 // assume branch is more often taken than not (loops use backward branches)
1962 Label not_taken;
1963 __ pop_ptr(r1);
1964 __ cmpoop(r1, r0);
1965 __ br(j_not(cc), not_taken);
1966 branch(false, false);
1967 __ bind(not_taken);
1968 __ profile_not_taken_branch(r0);
1969 }
1970
1971 void TemplateTable::ret() {
1972 transition(vtos, vtos);
1973 // We might be moving to a safepoint. The thread which calls
1974 // Interpreter::notice_safepoints() will effectively flush its cache
1975 // when it makes a system call, but we need to do something to
1976 // ensure that we see the changed dispatch table.
1977 __ membar(MacroAssembler::LoadLoad);
1978
1979 locals_index(r1);
1980 __ ldr(r1, aaddress(r1)); // get return bci, compute return bcp
1981 __ profile_ret(r1, r2);
1982 __ ldr(rbcp, Address(rmethod, Method::const_offset()));
1983 __ lea(rbcp, Address(rbcp, r1));
1984 __ add(rbcp, rbcp, in_bytes(ConstMethod::codes_offset()));
1985 __ dispatch_next(vtos, 0, /*generate_poll*/true);
1986 }
1987
1988 void TemplateTable::wide_ret() {
1989 transition(vtos, vtos);
1990 locals_index_wide(r1);
1991 __ ldr(r1, aaddress(r1)); // get return bci, compute return bcp
1992 __ profile_ret(r1, r2);
1993 __ ldr(rbcp, Address(rmethod, Method::const_offset()));
1994 __ lea(rbcp, Address(rbcp, r1));
1995 __ add(rbcp, rbcp, in_bytes(ConstMethod::codes_offset()));
1996 __ dispatch_next(vtos, 0, /*generate_poll*/true);
1997 }
1998
1999
2000 void TemplateTable::tableswitch() {
2001 Label default_case, continue_execution;
2002 transition(itos, vtos);
2003 // align rbcp
2004 __ lea(r1, at_bcp(BytesPerInt));
2005 __ andr(r1, r1, -BytesPerInt);
2006 // load lo & hi
2007 __ ldrw(r2, Address(r1, BytesPerInt));
2008 __ ldrw(r3, Address(r1, 2 * BytesPerInt));
2009 __ rev32(r2, r2);
2010 __ rev32(r3, r3);
2011 // check against lo & hi
2012 __ cmpw(r0, r2);
2013 __ br(Assembler::LT, default_case);
2014 __ cmpw(r0, r3);
2015 __ br(Assembler::GT, default_case);
2016 // lookup dispatch offset
2017 __ subw(r0, r0, r2);
2018 __ lea(r3, Address(r1, r0, Address::uxtw(2)));
2019 __ ldrw(r3, Address(r3, 3 * BytesPerInt));
2020 __ profile_switch_case(r0, r1, r2);
2021 // continue execution
2022 __ bind(continue_execution);
2023 __ rev32(r3, r3);
2024 __ load_unsigned_byte(rscratch1, Address(rbcp, r3, Address::sxtw(0)));
2025 __ add(rbcp, rbcp, r3, ext::sxtw);
2026 __ dispatch_only(vtos, /*generate_poll*/true);
2027 // handle default
2028 __ bind(default_case);
2029 __ profile_switch_default(r0);
2030 __ ldrw(r3, Address(r1, 0));
2031 __ b(continue_execution);
2032 }
2033
2034 void TemplateTable::lookupswitch() {
2035 transition(itos, itos);
2036 __ stop("lookupswitch bytecode should have been rewritten");
2037 }
2038
2039 void TemplateTable::fast_linearswitch() {
2040 transition(itos, vtos);
2041 Label loop_entry, loop, found, continue_execution;
2042 // bswap r0 so we can avoid bswapping the table entries
2043 __ rev32(r0, r0);
2044 // align rbcp
2045 __ lea(r19, at_bcp(BytesPerInt)); // btw: should be able to get rid of
2046 // this instruction (change offsets
2047 // below)
2048 __ andr(r19, r19, -BytesPerInt);
2049 // set counter
2050 __ ldrw(r1, Address(r19, BytesPerInt));
2051 __ rev32(r1, r1);
2052 __ b(loop_entry);
2053 // table search
2054 __ bind(loop);
2055 __ lea(rscratch1, Address(r19, r1, Address::lsl(3)));
2056 __ ldrw(rscratch1, Address(rscratch1, 2 * BytesPerInt));
2057 __ cmpw(r0, rscratch1);
2058 __ br(Assembler::EQ, found);
2059 __ bind(loop_entry);
2060 __ subs(r1, r1, 1);
2061 __ br(Assembler::PL, loop);
2062 // default case
2063 __ profile_switch_default(r0);
2064 __ ldrw(r3, Address(r19, 0));
2065 __ b(continue_execution);
2066 // entry found -> get offset
2067 __ bind(found);
2068 __ lea(rscratch1, Address(r19, r1, Address::lsl(3)));
2069 __ ldrw(r3, Address(rscratch1, 3 * BytesPerInt));
2070 __ profile_switch_case(r1, r0, r19);
2071 // continue execution
2072 __ bind(continue_execution);
2073 __ rev32(r3, r3);
2074 __ add(rbcp, rbcp, r3, ext::sxtw);
2075 __ ldrb(rscratch1, Address(rbcp, 0));
2076 __ dispatch_only(vtos, /*generate_poll*/true);
2077 }
2078
2079 void TemplateTable::fast_binaryswitch() {
2080 transition(itos, vtos);
2081 // Implementation using the following core algorithm:
2082 //
2083 // int binary_search(int key, LookupswitchPair* array, int n) {
2084 // // Binary search according to "Methodik des Programmierens" by
2085 // // Edsger W. Dijkstra and W.H.J. Feijen, Addison Wesley Germany 1985.
2086 // int i = 0;
2087 // int j = n;
2088 // while (i+1 < j) {
2089 // // invariant P: 0 <= i < j <= n and (a[i] <= key < a[j] or Q)
2090 // // with Q: for all i: 0 <= i < n: key < a[i]
2091 // // where a stands for the array and assuming that the (inexisting)
2092 // // element a[n] is infinitely big.
2093 // int h = (i + j) >> 1;
2094 // // i < h < j
2095 // if (key < array[h].fast_match()) {
2096 // j = h;
2097 // } else {
2098 // i = h;
2099 // }
2100 // }
2101 // // R: a[i] <= key < a[i+1] or Q
2102 // // (i.e., if key is within array, i is the correct index)
2103 // return i;
2104 // }
2105
2106 // Register allocation
2107 const Register key = r0; // already set (tosca)
2108 const Register array = r1;
2109 const Register i = r2;
2110 const Register j = r3;
2111 const Register h = rscratch1;
2112 const Register temp = rscratch2;
2113
2114 // Find array start
2115 __ lea(array, at_bcp(3 * BytesPerInt)); // btw: should be able to
2116 // get rid of this
2117 // instruction (change
2118 // offsets below)
2119 __ andr(array, array, -BytesPerInt);
2120
2121 // Initialize i & j
2122 __ mov(i, 0); // i = 0;
2123 __ ldrw(j, Address(array, -BytesPerInt)); // j = length(array);
2124
2125 // Convert j into native byteordering
2126 __ rev32(j, j);
2127
2128 // And start
2129 Label entry;
2130 __ b(entry);
2131
2132 // binary search loop
2133 {
2134 Label loop;
2135 __ bind(loop);
2136 // int h = (i + j) >> 1;
2137 __ addw(h, i, j); // h = i + j;
2138 __ lsrw(h, h, 1); // h = (i + j) >> 1;
2139 // if (key < array[h].fast_match()) {
2140 // j = h;
2141 // } else {
2142 // i = h;
2143 // }
2144 // Convert array[h].match to native byte-ordering before compare
2145 __ ldr(temp, Address(array, h, Address::lsl(3)));
2146 __ rev32(temp, temp);
2147 __ cmpw(key, temp);
2148 // j = h if (key < array[h].fast_match())
2149 __ csel(j, h, j, Assembler::LT);
2150 // i = h if (key >= array[h].fast_match())
2151 __ csel(i, h, i, Assembler::GE);
2152 // while (i+1 < j)
2153 __ bind(entry);
2154 __ addw(h, i, 1); // i+1
2155 __ cmpw(h, j); // i+1 < j
2156 __ br(Assembler::LT, loop);
2157 }
2158
2159 // end of binary search, result index is i (must check again!)
2160 Label default_case;
2161 // Convert array[i].match to native byte-ordering before compare
2162 __ ldr(temp, Address(array, i, Address::lsl(3)));
2163 __ rev32(temp, temp);
2164 __ cmpw(key, temp);
2165 __ br(Assembler::NE, default_case);
2166
2167 // entry found -> j = offset
2168 __ add(j, array, i, ext::uxtx, 3);
2169 __ ldrw(j, Address(j, BytesPerInt));
2170 __ profile_switch_case(i, key, array);
2171 __ rev32(j, j);
2172 __ load_unsigned_byte(rscratch1, Address(rbcp, j, Address::sxtw(0)));
2173 __ lea(rbcp, Address(rbcp, j, Address::sxtw(0)));
2174 __ dispatch_only(vtos, /*generate_poll*/true);
2175
2176 // default case -> j = default offset
2177 __ bind(default_case);
2178 __ profile_switch_default(i);
2179 __ ldrw(j, Address(array, -2 * BytesPerInt));
2180 __ rev32(j, j);
2181 __ load_unsigned_byte(rscratch1, Address(rbcp, j, Address::sxtw(0)));
2182 __ lea(rbcp, Address(rbcp, j, Address::sxtw(0)));
2183 __ dispatch_only(vtos, /*generate_poll*/true);
2184 }
2185
2186
2187 void TemplateTable::_return(TosState state)
2188 {
2189 transition(state, state);
2190 assert(_desc->calls_vm(),
2191 "inconsistent calls_vm information"); // call in remove_activation
2192
2193 if (_desc->bytecode() == Bytecodes::_return_register_finalizer) {
2194 assert(state == vtos, "only valid state");
2195
2196 __ ldr(c_rarg1, aaddress(0));
2197 __ load_klass(r3, c_rarg1);
2198 __ ldrw(r3, Address(r3, Klass::access_flags_offset()));
2199 Label skip_register_finalizer;
2200 __ tbz(r3, exact_log2(JVM_ACC_HAS_FINALIZER), skip_register_finalizer);
2201
2202 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::register_finalizer), c_rarg1);
2203
2204 __ bind(skip_register_finalizer);
2205 }
2206
2207 // Issue a StoreStore barrier after all stores but before return
2208 // from any constructor for any class with a final field. We don't
2209 // know if this is a finalizer, so we always do so.
2210 if (_desc->bytecode() == Bytecodes::_return)
2211 __ membar(MacroAssembler::StoreStore);
2212
2213 // Narrow result if state is itos but result type is smaller.
2214 // Need to narrow in the return bytecode rather than in generate_return_entry
2215 // since compiled code callers expect the result to already be narrowed.
2216 if (state == itos) {
2217 __ narrow(r0);
2218 }
2219
2220 __ remove_activation(state);
2221 __ ret(lr);
2222 }
2223
2224 // ----------------------------------------------------------------------------
2225 // Volatile variables demand their effects be made known to all CPU's
2226 // in order. Store buffers on most chips allow reads & writes to
2227 // reorder; the JMM's ReadAfterWrite.java test fails in -Xint mode
2228 // without some kind of memory barrier (i.e., it's not sufficient that
2229 // the interpreter does not reorder volatile references, the hardware
2230 // also must not reorder them).
2231 //
2232 // According to the new Java Memory Model (JMM):
2233 // (1) All volatiles are serialized wrt to each other. ALSO reads &
2234 // writes act as acquire & release, so:
2235 // (2) A read cannot let unrelated NON-volatile memory refs that
2236 // happen after the read float up to before the read. It's OK for
2237 // non-volatile memory refs that happen before the volatile read to
2238 // float down below it.
2239 // (3) Similar a volatile write cannot let unrelated NON-volatile
2240 // memory refs that happen BEFORE the write float down to after the
2241 // write. It's OK for non-volatile memory refs that happen after the
2242 // volatile write to float up before it.
2243 //
2244 // We only put in barriers around volatile refs (they are expensive),
2245 // not _between_ memory refs (that would require us to track the
2246 // flavor of the previous memory refs). Requirements (2) and (3)
2247 // require some barriers before volatile stores and after volatile
2248 // loads. These nearly cover requirement (1) but miss the
2249 // volatile-store-volatile-load case. This final case is placed after
2250 // volatile-stores although it could just as well go before
2251 // volatile-loads.
2252
2253 void TemplateTable::resolve_cache_and_index(int byte_no,
2254 Register Rcache,
2255 Register index,
2256 size_t index_size) {
2257 const Register temp = r19;
2258 assert_different_registers(Rcache, index, temp);
2259
2260 Label resolved, clinit_barrier_slow;
2261
2262 Bytecodes::Code code = bytecode();
2263 switch (code) {
2264 case Bytecodes::_nofast_getfield: code = Bytecodes::_getfield; break;
2265 case Bytecodes::_nofast_putfield: code = Bytecodes::_putfield; break;
2266 default: break;
2267 }
2268
2269 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");
2270 __ get_cache_and_index_and_bytecode_at_bcp(Rcache, index, temp, byte_no, 1, index_size);
2271 __ subs(zr, temp, (int) code); // have we resolved this bytecode?
2272 __ br(Assembler::EQ, resolved);
2273
2274 // resolve first time through
2275 // Class initialization barrier slow path lands here as well.
2276 __ bind(clinit_barrier_slow);
2277 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_from_cache);
2278 __ mov(temp, (int) code);
2279 __ call_VM(noreg, entry, temp);
2280
2281 // Update registers with resolved info
2282 __ get_cache_and_index_at_bcp(Rcache, index, 1, index_size);
2283 // n.b. unlike x86 Rcache is now rcpool plus the indexed offset
2284 // so all clients ofthis method must be modified accordingly
2285 __ bind(resolved);
2286
2287 // Class initialization barrier for static methods
2288 if (VM_Version::supports_fast_class_init_checks() && bytecode() == Bytecodes::_invokestatic) {
2289 __ load_resolved_method_at_index(byte_no, temp, Rcache);
2290 __ load_method_holder(temp, temp);
2291 __ clinit_barrier(temp, rscratch1, NULL, &clinit_barrier_slow);
2292 }
2293 }
2294
2295 // The Rcache and index registers must be set before call
2296 // n.b unlike x86 cache already includes the index offset
2297 void TemplateTable::load_field_cp_cache_entry(Register obj,
2298 Register cache,
2299 Register index,
2300 Register off,
2301 Register flags,
2302 bool is_static = false) {
2303 assert_different_registers(cache, index, flags, off);
2304
2305 ByteSize cp_base_offset = ConstantPoolCache::base_offset();
2306 // Field offset
2307 __ ldr(off, Address(cache, in_bytes(cp_base_offset +
2308 ConstantPoolCacheEntry::f2_offset())));
2309 // Flags
2310 __ ldrw(flags, Address(cache, in_bytes(cp_base_offset +
2311 ConstantPoolCacheEntry::flags_offset())));
2312
2313 // klass overwrite register
2314 if (is_static) {
2315 __ ldr(obj, Address(cache, in_bytes(cp_base_offset +
2316 ConstantPoolCacheEntry::f1_offset())));
2317 const int mirror_offset = in_bytes(Klass::java_mirror_offset());
2318 __ ldr(obj, Address(obj, mirror_offset));
2319 __ resolve_oop_handle(obj, r5, rscratch2);
2320 }
2321 }
2322
2323 void TemplateTable::load_invoke_cp_cache_entry(int byte_no,
2324 Register method,
2325 Register itable_index,
2326 Register flags,
2327 bool is_invokevirtual,
2328 bool is_invokevfinal, /*unused*/
2329 bool is_invokedynamic) {
2330 // setup registers
2331 const Register cache = rscratch2;
2332 const Register index = r4;
2333 assert_different_registers(method, flags);
2334 assert_different_registers(method, cache, index);
2335 assert_different_registers(itable_index, flags);
2336 assert_different_registers(itable_index, cache, index);
2337 // determine constant pool cache field offsets
2338 assert(is_invokevirtual == (byte_no == f2_byte), "is_invokevirtual flag redundant");
2339 const int method_offset = in_bytes(
2340 ConstantPoolCache::base_offset() +
2341 (is_invokevirtual
2342 ? ConstantPoolCacheEntry::f2_offset()
2343 : ConstantPoolCacheEntry::f1_offset()));
2344 const int flags_offset = in_bytes(ConstantPoolCache::base_offset() +
2345 ConstantPoolCacheEntry::flags_offset());
2346 // access constant pool cache fields
2347 const int index_offset = in_bytes(ConstantPoolCache::base_offset() +
2348 ConstantPoolCacheEntry::f2_offset());
2349
2350 size_t index_size = (is_invokedynamic ? sizeof(u4) : sizeof(u2));
2351 resolve_cache_and_index(byte_no, cache, index, index_size);
2352 __ ldr(method, Address(cache, method_offset));
2353
2354 if (itable_index != noreg) {
2355 __ ldr(itable_index, Address(cache, index_offset));
2356 }
2357 __ ldrw(flags, Address(cache, flags_offset));
2358 }
2359
2360
2361 // The registers cache and index expected to be set before call.
2362 // Correct values of the cache and index registers are preserved.
2363 void TemplateTable::jvmti_post_field_access(Register cache, Register index,
2364 bool is_static, bool has_tos) {
2365 // do the JVMTI work here to avoid disturbing the register state below
2366 // We use c_rarg registers here because we want to use the register used in
2367 // the call to the VM
2368 if (JvmtiExport::can_post_field_access()) {
2369 // Check to see if a field access watch has been set before we
2370 // take the time to call into the VM.
2371 Label L1;
2372 assert_different_registers(cache, index, r0);
2373 __ lea(rscratch1, ExternalAddress((address) JvmtiExport::get_field_access_count_addr()));
2374 __ ldrw(r0, Address(rscratch1));
2375 __ cbzw(r0, L1);
2376
2377 __ get_cache_and_index_at_bcp(c_rarg2, c_rarg3, 1);
2378 __ lea(c_rarg2, Address(c_rarg2, in_bytes(ConstantPoolCache::base_offset())));
2379
2380 if (is_static) {
2381 __ mov(c_rarg1, zr); // NULL object reference
2382 } else {
2383 __ ldr(c_rarg1, at_tos()); // get object pointer without popping it
2384 __ verify_oop(c_rarg1);
2385 }
2386 // c_rarg1: object pointer or NULL
2387 // c_rarg2: cache entry pointer
2388 // c_rarg3: jvalue object on the stack
2389 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
2390 InterpreterRuntime::post_field_access),
2391 c_rarg1, c_rarg2, c_rarg3);
2392 __ get_cache_and_index_at_bcp(cache, index, 1);
2393 __ bind(L1);
2394 }
2395 }
2396
2397 void TemplateTable::pop_and_check_object(Register r)
2398 {
2399 __ pop_ptr(r);
2400 __ null_check(r); // for field access must check obj.
2401 __ verify_oop(r);
2402 }
2403
2404 void TemplateTable::getfield_or_static(int byte_no, bool is_static, RewriteControl rc)
2405 {
2406 const Register cache = r2;
2407 const Register index = r3;
2408 const Register obj = r4;
2409 const Register off = r19;
2410 const Register flags = r0;
2411 const Register raw_flags = r6;
2412 const Register bc = r4; // uses same reg as obj, so don't mix them
2413
2414 resolve_cache_and_index(byte_no, cache, index, sizeof(u2));
2415 jvmti_post_field_access(cache, index, is_static, false);
2416 load_field_cp_cache_entry(obj, cache, index, off, raw_flags, is_static);
2417
2418 if (!is_static) {
2419 // obj is on the stack
2420 pop_and_check_object(obj);
2421 }
2422
2423 // 8179954: We need to make sure that the code generated for
2424 // volatile accesses forms a sequentially-consistent set of
2425 // operations when combined with STLR and LDAR. Without a leading
2426 // membar it's possible for a simple Dekker test to fail if loads
2427 // use LDR;DMB but stores use STLR. This can happen if C2 compiles
2428 // the stores in one method and we interpret the loads in another.
2429 if (!CompilerConfig::is_c1_or_interpreter_only_no_jvmci()){
2430 Label notVolatile;
2431 __ tbz(raw_flags, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
2432 __ membar(MacroAssembler::AnyAny);
2433 __ bind(notVolatile);
2434 }
2435
2436 const Address field(obj, off);
2437
2438 Label Done, notByte, notBool, notInt, notShort, notChar,
2439 notLong, notFloat, notObj, notDouble;
2440
2441 // x86 uses a shift and mask or wings it with a shift plus assert
2442 // the mask is not needed. aarch64 just uses bitfield extract
2443 __ ubfxw(flags, raw_flags, ConstantPoolCacheEntry::tos_state_shift,
2444 ConstantPoolCacheEntry::tos_state_bits);
2445
2446 assert(btos == 0, "change code, btos != 0");
2447 __ cbnz(flags, notByte);
2448
2449 // Don't rewrite getstatic, only getfield
2450 if (is_static) rc = may_not_rewrite;
2451
2452 // btos
2453 __ access_load_at(T_BYTE, IN_HEAP, r0, field, noreg, noreg);
2454 __ push(btos);
2455 // Rewrite bytecode to be faster
2456 if (rc == may_rewrite) {
2457 patch_bytecode(Bytecodes::_fast_bgetfield, bc, r1);
2458 }
2459 __ b(Done);
2460
2461 __ bind(notByte);
2462 __ cmp(flags, (u1)ztos);
2463 __ br(Assembler::NE, notBool);
2464
2465 // ztos (same code as btos)
2466 __ access_load_at(T_BOOLEAN, IN_HEAP, r0, field, noreg, noreg);
2467 __ push(ztos);
2468 // Rewrite bytecode to be faster
2469 if (rc == may_rewrite) {
2470 // use btos rewriting, no truncating to t/f bit is needed for getfield.
2471 patch_bytecode(Bytecodes::_fast_bgetfield, bc, r1);
2472 }
2473 __ b(Done);
2474
2475 __ bind(notBool);
2476 __ cmp(flags, (u1)atos);
2477 __ br(Assembler::NE, notObj);
2478 // atos
2479 do_oop_load(_masm, field, r0, IN_HEAP);
2480 __ push(atos);
2481 if (rc == may_rewrite) {
2482 patch_bytecode(Bytecodes::_fast_agetfield, bc, r1);
2483 }
2484 __ b(Done);
2485
2486 __ bind(notObj);
2487 __ cmp(flags, (u1)itos);
2488 __ br(Assembler::NE, notInt);
2489 // itos
2490 __ access_load_at(T_INT, IN_HEAP, r0, field, noreg, noreg);
2491 __ push(itos);
2492 // Rewrite bytecode to be faster
2493 if (rc == may_rewrite) {
2494 patch_bytecode(Bytecodes::_fast_igetfield, bc, r1);
2495 }
2496 __ b(Done);
2497
2498 __ bind(notInt);
2499 __ cmp(flags, (u1)ctos);
2500 __ br(Assembler::NE, notChar);
2501 // ctos
2502 __ access_load_at(T_CHAR, IN_HEAP, r0, field, noreg, noreg);
2503 __ push(ctos);
2504 // Rewrite bytecode to be faster
2505 if (rc == may_rewrite) {
2506 patch_bytecode(Bytecodes::_fast_cgetfield, bc, r1);
2507 }
2508 __ b(Done);
2509
2510 __ bind(notChar);
2511 __ cmp(flags, (u1)stos);
2512 __ br(Assembler::NE, notShort);
2513 // stos
2514 __ access_load_at(T_SHORT, IN_HEAP, r0, field, noreg, noreg);
2515 __ push(stos);
2516 // Rewrite bytecode to be faster
2517 if (rc == may_rewrite) {
2518 patch_bytecode(Bytecodes::_fast_sgetfield, bc, r1);
2519 }
2520 __ b(Done);
2521
2522 __ bind(notShort);
2523 __ cmp(flags, (u1)ltos);
2524 __ br(Assembler::NE, notLong);
2525 // ltos
2526 __ access_load_at(T_LONG, IN_HEAP, r0, field, noreg, noreg);
2527 __ push(ltos);
2528 // Rewrite bytecode to be faster
2529 if (rc == may_rewrite) {
2530 patch_bytecode(Bytecodes::_fast_lgetfield, bc, r1);
2531 }
2532 __ b(Done);
2533
2534 __ bind(notLong);
2535 __ cmp(flags, (u1)ftos);
2536 __ br(Assembler::NE, notFloat);
2537 // ftos
2538 __ access_load_at(T_FLOAT, IN_HEAP, noreg /* ftos */, field, noreg, noreg);
2539 __ push(ftos);
2540 // Rewrite bytecode to be faster
2541 if (rc == may_rewrite) {
2542 patch_bytecode(Bytecodes::_fast_fgetfield, bc, r1);
2543 }
2544 __ b(Done);
2545
2546 __ bind(notFloat);
2547 #ifdef ASSERT
2548 __ cmp(flags, (u1)dtos);
2549 __ br(Assembler::NE, notDouble);
2550 #endif
2551 // dtos
2552 __ access_load_at(T_DOUBLE, IN_HEAP, noreg /* ftos */, field, noreg, noreg);
2553 __ push(dtos);
2554 // Rewrite bytecode to be faster
2555 if (rc == may_rewrite) {
2556 patch_bytecode(Bytecodes::_fast_dgetfield, bc, r1);
2557 }
2558 #ifdef ASSERT
2559 __ b(Done);
2560
2561 __ bind(notDouble);
2562 __ stop("Bad state");
2563 #endif
2564
2565 __ bind(Done);
2566
2567 Label notVolatile;
2568 __ tbz(raw_flags, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
2569 __ membar(MacroAssembler::LoadLoad | MacroAssembler::LoadStore);
2570 __ bind(notVolatile);
2571 }
2572
2573
2574 void TemplateTable::getfield(int byte_no)
2575 {
2576 getfield_or_static(byte_no, false);
2577 }
2578
2579 void TemplateTable::nofast_getfield(int byte_no) {
2580 getfield_or_static(byte_no, false, may_not_rewrite);
2581 }
2582
2583 void TemplateTable::getstatic(int byte_no)
2584 {
2585 getfield_or_static(byte_no, true);
2586 }
2587
2588 // The registers cache and index expected to be set before call.
2589 // The function may destroy various registers, just not the cache and index registers.
2590 void TemplateTable::jvmti_post_field_mod(Register cache, Register index, bool is_static) {
2591 transition(vtos, vtos);
2592
2593 ByteSize cp_base_offset = ConstantPoolCache::base_offset();
2594
2595 if (JvmtiExport::can_post_field_modification()) {
2596 // Check to see if a field modification watch has been set before
2597 // we take the time to call into the VM.
2598 Label L1;
2599 assert_different_registers(cache, index, r0);
2600 __ lea(rscratch1, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr()));
2601 __ ldrw(r0, Address(rscratch1));
2602 __ cbz(r0, L1);
2603
2604 __ get_cache_and_index_at_bcp(c_rarg2, rscratch1, 1);
2605
2606 if (is_static) {
2607 // Life is simple. Null out the object pointer.
2608 __ mov(c_rarg1, zr);
2609 } else {
2610 // Life is harder. The stack holds the value on top, followed by
2611 // the object. We don't know the size of the value, though; it
2612 // could be one or two words depending on its type. As a result,
2613 // we must find the type to determine where the object is.
2614 __ ldrw(c_rarg3, Address(c_rarg2,
2615 in_bytes(cp_base_offset +
2616 ConstantPoolCacheEntry::flags_offset())));
2617 __ lsr(c_rarg3, c_rarg3,
2618 ConstantPoolCacheEntry::tos_state_shift);
2619 ConstantPoolCacheEntry::verify_tos_state_shift();
2620 Label nope2, done, ok;
2621 __ ldr(c_rarg1, at_tos_p1()); // initially assume a one word jvalue
2622 __ cmpw(c_rarg3, ltos);
2623 __ br(Assembler::EQ, ok);
2624 __ cmpw(c_rarg3, dtos);
2625 __ br(Assembler::NE, nope2);
2626 __ bind(ok);
2627 __ ldr(c_rarg1, at_tos_p2()); // ltos (two word jvalue)
2628 __ bind(nope2);
2629 }
2630 // cache entry pointer
2631 __ add(c_rarg2, c_rarg2, in_bytes(cp_base_offset));
2632 // object (tos)
2633 __ mov(c_rarg3, esp);
2634 // c_rarg1: object pointer set up above (NULL if static)
2635 // c_rarg2: cache entry pointer
2636 // c_rarg3: jvalue object on the stack
2637 __ call_VM(noreg,
2638 CAST_FROM_FN_PTR(address,
2639 InterpreterRuntime::post_field_modification),
2640 c_rarg1, c_rarg2, c_rarg3);
2641 __ get_cache_and_index_at_bcp(cache, index, 1);
2642 __ bind(L1);
2643 }
2644 }
2645
2646 void TemplateTable::putfield_or_static(int byte_no, bool is_static, RewriteControl rc) {
2647 transition(vtos, vtos);
2648
2649 const Register cache = r2;
2650 const Register index = r3;
2651 const Register obj = r2;
2652 const Register off = r19;
2653 const Register flags = r0;
2654 const Register bc = r4;
2655
2656 resolve_cache_and_index(byte_no, cache, index, sizeof(u2));
2657 jvmti_post_field_mod(cache, index, is_static);
2658 load_field_cp_cache_entry(obj, cache, index, off, flags, is_static);
2659
2660 Label Done;
2661 __ mov(r5, flags);
2662
2663 {
2664 Label notVolatile;
2665 __ tbz(r5, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
2666 __ membar(MacroAssembler::StoreStore | MacroAssembler::LoadStore);
2667 __ bind(notVolatile);
2668 }
2669
2670 // field address
2671 const Address field(obj, off);
2672
2673 Label notByte, notBool, notInt, notShort, notChar,
2674 notLong, notFloat, notObj, notDouble;
2675
2676 // x86 uses a shift and mask or wings it with a shift plus assert
2677 // the mask is not needed. aarch64 just uses bitfield extract
2678 __ ubfxw(flags, flags, ConstantPoolCacheEntry::tos_state_shift, ConstantPoolCacheEntry::tos_state_bits);
2679
2680 assert(btos == 0, "change code, btos != 0");
2681 __ cbnz(flags, notByte);
2682
2683 // Don't rewrite putstatic, only putfield
2684 if (is_static) rc = may_not_rewrite;
2685
2686 // btos
2687 {
2688 __ pop(btos);
2689 if (!is_static) pop_and_check_object(obj);
2690 __ access_store_at(T_BYTE, IN_HEAP, field, r0, noreg, noreg, noreg);
2691 if (rc == may_rewrite) {
2692 patch_bytecode(Bytecodes::_fast_bputfield, bc, r1, true, byte_no);
2693 }
2694 __ b(Done);
2695 }
2696
2697 __ bind(notByte);
2698 __ cmp(flags, (u1)ztos);
2699 __ br(Assembler::NE, notBool);
2700
2701 // ztos
2702 {
2703 __ pop(ztos);
2704 if (!is_static) pop_and_check_object(obj);
2705 __ access_store_at(T_BOOLEAN, IN_HEAP, field, r0, noreg, noreg, noreg);
2706 if (rc == may_rewrite) {
2707 patch_bytecode(Bytecodes::_fast_zputfield, bc, r1, true, byte_no);
2708 }
2709 __ b(Done);
2710 }
2711
2712 __ bind(notBool);
2713 __ cmp(flags, (u1)atos);
2714 __ br(Assembler::NE, notObj);
2715
2716 // atos
2717 {
2718 __ pop(atos);
2719 if (!is_static) pop_and_check_object(obj);
2720 // Store into the field
2721 do_oop_store(_masm, field, r0, IN_HEAP);
2722 if (rc == may_rewrite) {
2723 patch_bytecode(Bytecodes::_fast_aputfield, bc, r1, true, byte_no);
2724 }
2725 __ b(Done);
2726 }
2727
2728 __ bind(notObj);
2729 __ cmp(flags, (u1)itos);
2730 __ br(Assembler::NE, notInt);
2731
2732 // itos
2733 {
2734 __ pop(itos);
2735 if (!is_static) pop_and_check_object(obj);
2736 __ access_store_at(T_INT, IN_HEAP, field, r0, noreg, noreg, noreg);
2737 if (rc == may_rewrite) {
2738 patch_bytecode(Bytecodes::_fast_iputfield, bc, r1, true, byte_no);
2739 }
2740 __ b(Done);
2741 }
2742
2743 __ bind(notInt);
2744 __ cmp(flags, (u1)ctos);
2745 __ br(Assembler::NE, notChar);
2746
2747 // ctos
2748 {
2749 __ pop(ctos);
2750 if (!is_static) pop_and_check_object(obj);
2751 __ access_store_at(T_CHAR, IN_HEAP, field, r0, noreg, noreg, noreg);
2752 if (rc == may_rewrite) {
2753 patch_bytecode(Bytecodes::_fast_cputfield, bc, r1, true, byte_no);
2754 }
2755 __ b(Done);
2756 }
2757
2758 __ bind(notChar);
2759 __ cmp(flags, (u1)stos);
2760 __ br(Assembler::NE, notShort);
2761
2762 // stos
2763 {
2764 __ pop(stos);
2765 if (!is_static) pop_and_check_object(obj);
2766 __ access_store_at(T_SHORT, IN_HEAP, field, r0, noreg, noreg, noreg);
2767 if (rc == may_rewrite) {
2768 patch_bytecode(Bytecodes::_fast_sputfield, bc, r1, true, byte_no);
2769 }
2770 __ b(Done);
2771 }
2772
2773 __ bind(notShort);
2774 __ cmp(flags, (u1)ltos);
2775 __ br(Assembler::NE, notLong);
2776
2777 // ltos
2778 {
2779 __ pop(ltos);
2780 if (!is_static) pop_and_check_object(obj);
2781 __ access_store_at(T_LONG, IN_HEAP, field, r0, noreg, noreg, noreg);
2782 if (rc == may_rewrite) {
2783 patch_bytecode(Bytecodes::_fast_lputfield, bc, r1, true, byte_no);
2784 }
2785 __ b(Done);
2786 }
2787
2788 __ bind(notLong);
2789 __ cmp(flags, (u1)ftos);
2790 __ br(Assembler::NE, notFloat);
2791
2792 // ftos
2793 {
2794 __ pop(ftos);
2795 if (!is_static) pop_and_check_object(obj);
2796 __ access_store_at(T_FLOAT, IN_HEAP, field, noreg /* ftos */, noreg, noreg, noreg);
2797 if (rc == may_rewrite) {
2798 patch_bytecode(Bytecodes::_fast_fputfield, bc, r1, true, byte_no);
2799 }
2800 __ b(Done);
2801 }
2802
2803 __ bind(notFloat);
2804 #ifdef ASSERT
2805 __ cmp(flags, (u1)dtos);
2806 __ br(Assembler::NE, notDouble);
2807 #endif
2808
2809 // dtos
2810 {
2811 __ pop(dtos);
2812 if (!is_static) pop_and_check_object(obj);
2813 __ access_store_at(T_DOUBLE, IN_HEAP, field, noreg /* dtos */, noreg, noreg, noreg);
2814 if (rc == may_rewrite) {
2815 patch_bytecode(Bytecodes::_fast_dputfield, bc, r1, true, byte_no);
2816 }
2817 }
2818
2819 #ifdef ASSERT
2820 __ b(Done);
2821
2822 __ bind(notDouble);
2823 __ stop("Bad state");
2824 #endif
2825
2826 __ bind(Done);
2827
2828 {
2829 Label notVolatile;
2830 __ tbz(r5, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
2831 __ membar(MacroAssembler::StoreLoad | MacroAssembler::StoreStore);
2832 __ bind(notVolatile);
2833 }
2834 }
2835
2836 void TemplateTable::putfield(int byte_no)
2837 {
2838 putfield_or_static(byte_no, false);
2839 }
2840
2841 void TemplateTable::nofast_putfield(int byte_no) {
2842 putfield_or_static(byte_no, false, may_not_rewrite);
2843 }
2844
2845 void TemplateTable::putstatic(int byte_no) {
2846 putfield_or_static(byte_no, true);
2847 }
2848
2849 void TemplateTable::jvmti_post_fast_field_mod()
2850 {
2851 if (JvmtiExport::can_post_field_modification()) {
2852 // Check to see if a field modification watch has been set before
2853 // we take the time to call into the VM.
2854 Label L2;
2855 __ lea(rscratch1, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr()));
2856 __ ldrw(c_rarg3, Address(rscratch1));
2857 __ cbzw(c_rarg3, L2);
2858 __ pop_ptr(r19); // copy the object pointer from tos
2859 __ verify_oop(r19);
2860 __ push_ptr(r19); // put the object pointer back on tos
2861 // Save tos values before call_VM() clobbers them. Since we have
2862 // to do it for every data type, we use the saved values as the
2863 // jvalue object.
2864 switch (bytecode()) { // load values into the jvalue object
2865 case Bytecodes::_fast_aputfield: __ push_ptr(r0); break;
2866 case Bytecodes::_fast_bputfield: // fall through
2867 case Bytecodes::_fast_zputfield: // fall through
2868 case Bytecodes::_fast_sputfield: // fall through
2869 case Bytecodes::_fast_cputfield: // fall through
2870 case Bytecodes::_fast_iputfield: __ push_i(r0); break;
2871 case Bytecodes::_fast_dputfield: __ push_d(); break;
2872 case Bytecodes::_fast_fputfield: __ push_f(); break;
2873 case Bytecodes::_fast_lputfield: __ push_l(r0); break;
2874
2875 default:
2876 ShouldNotReachHere();
2877 }
2878 __ mov(c_rarg3, esp); // points to jvalue on the stack
2879 // access constant pool cache entry
2880 __ get_cache_entry_pointer_at_bcp(c_rarg2, r0, 1);
2881 __ verify_oop(r19);
2882 // r19: object pointer copied above
2883 // c_rarg2: cache entry pointer
2884 // c_rarg3: jvalue object on the stack
2885 __ call_VM(noreg,
2886 CAST_FROM_FN_PTR(address,
2887 InterpreterRuntime::post_field_modification),
2888 r19, c_rarg2, c_rarg3);
2889
2890 switch (bytecode()) { // restore tos values
2891 case Bytecodes::_fast_aputfield: __ pop_ptr(r0); break;
2892 case Bytecodes::_fast_bputfield: // fall through
2893 case Bytecodes::_fast_zputfield: // fall through
2894 case Bytecodes::_fast_sputfield: // fall through
2895 case Bytecodes::_fast_cputfield: // fall through
2896 case Bytecodes::_fast_iputfield: __ pop_i(r0); break;
2897 case Bytecodes::_fast_dputfield: __ pop_d(); break;
2898 case Bytecodes::_fast_fputfield: __ pop_f(); break;
2899 case Bytecodes::_fast_lputfield: __ pop_l(r0); break;
2900 default: break;
2901 }
2902 __ bind(L2);
2903 }
2904 }
2905
2906 void TemplateTable::fast_storefield(TosState state)
2907 {
2908 transition(state, vtos);
2909
2910 ByteSize base = ConstantPoolCache::base_offset();
2911
2912 jvmti_post_fast_field_mod();
2913
2914 // access constant pool cache
2915 __ get_cache_and_index_at_bcp(r2, r1, 1);
2916
2917 // Must prevent reordering of the following cp cache loads with bytecode load
2918 __ membar(MacroAssembler::LoadLoad);
2919
2920 // test for volatile with r3
2921 __ ldrw(r3, Address(r2, in_bytes(base +
2922 ConstantPoolCacheEntry::flags_offset())));
2923
2924 // replace index with field offset from cache entry
2925 __ ldr(r1, Address(r2, in_bytes(base + ConstantPoolCacheEntry::f2_offset())));
2926
2927 {
2928 Label notVolatile;
2929 __ tbz(r3, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
2930 __ membar(MacroAssembler::StoreStore | MacroAssembler::LoadStore);
2931 __ bind(notVolatile);
2932 }
2933
2934 Label notVolatile;
2935
2936 // Get object from stack
2937 pop_and_check_object(r2);
2938
2939 // field address
2940 const Address field(r2, r1);
2941
2942 // access field
2943 switch (bytecode()) {
2944 case Bytecodes::_fast_aputfield:
2945 do_oop_store(_masm, field, r0, IN_HEAP);
2946 break;
2947 case Bytecodes::_fast_lputfield:
2948 __ access_store_at(T_LONG, IN_HEAP, field, r0, noreg, noreg, noreg);
2949 break;
2950 case Bytecodes::_fast_iputfield:
2951 __ access_store_at(T_INT, IN_HEAP, field, r0, noreg, noreg, noreg);
2952 break;
2953 case Bytecodes::_fast_zputfield:
2954 __ access_store_at(T_BOOLEAN, IN_HEAP, field, r0, noreg, noreg, noreg);
2955 break;
2956 case Bytecodes::_fast_bputfield:
2957 __ access_store_at(T_BYTE, IN_HEAP, field, r0, noreg, noreg, noreg);
2958 break;
2959 case Bytecodes::_fast_sputfield:
2960 __ access_store_at(T_SHORT, IN_HEAP, field, r0, noreg, noreg, noreg);
2961 break;
2962 case Bytecodes::_fast_cputfield:
2963 __ access_store_at(T_CHAR, IN_HEAP, field, r0, noreg, noreg, noreg);
2964 break;
2965 case Bytecodes::_fast_fputfield:
2966 __ access_store_at(T_FLOAT, IN_HEAP, field, noreg /* ftos */, noreg, noreg, noreg);
2967 break;
2968 case Bytecodes::_fast_dputfield:
2969 __ access_store_at(T_DOUBLE, IN_HEAP, field, noreg /* dtos */, noreg, noreg, noreg);
2970 break;
2971 default:
2972 ShouldNotReachHere();
2973 }
2974
2975 {
2976 Label notVolatile;
2977 __ tbz(r3, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
2978 __ membar(MacroAssembler::StoreLoad | MacroAssembler::StoreStore);
2979 __ bind(notVolatile);
2980 }
2981 }
2982
2983
2984 void TemplateTable::fast_accessfield(TosState state)
2985 {
2986 transition(atos, state);
2987 // Do the JVMTI work here to avoid disturbing the register state below
2988 if (JvmtiExport::can_post_field_access()) {
2989 // Check to see if a field access watch has been set before we
2990 // take the time to call into the VM.
2991 Label L1;
2992 __ lea(rscratch1, ExternalAddress((address) JvmtiExport::get_field_access_count_addr()));
2993 __ ldrw(r2, Address(rscratch1));
2994 __ cbzw(r2, L1);
2995 // access constant pool cache entry
2996 __ get_cache_entry_pointer_at_bcp(c_rarg2, rscratch2, 1);
2997 __ verify_oop(r0);
2998 __ push_ptr(r0); // save object pointer before call_VM() clobbers it
2999 __ mov(c_rarg1, r0);
3000 // c_rarg1: object pointer copied above
3001 // c_rarg2: cache entry pointer
3002 __ call_VM(noreg,
3003 CAST_FROM_FN_PTR(address,
3004 InterpreterRuntime::post_field_access),
3005 c_rarg1, c_rarg2);
3006 __ pop_ptr(r0); // restore object pointer
3007 __ bind(L1);
3008 }
3009
3010 // access constant pool cache
3011 __ get_cache_and_index_at_bcp(r2, r1, 1);
3012
3013 // Must prevent reordering of the following cp cache loads with bytecode load
3014 __ membar(MacroAssembler::LoadLoad);
3015
3016 __ ldr(r1, Address(r2, in_bytes(ConstantPoolCache::base_offset() +
3017 ConstantPoolCacheEntry::f2_offset())));
3018 __ ldrw(r3, Address(r2, in_bytes(ConstantPoolCache::base_offset() +
3019 ConstantPoolCacheEntry::flags_offset())));
3020
3021 // r0: object
3022 __ verify_oop(r0);
3023 __ null_check(r0);
3024 const Address field(r0, r1);
3025
3026 // 8179954: We need to make sure that the code generated for
3027 // volatile accesses forms a sequentially-consistent set of
3028 // operations when combined with STLR and LDAR. Without a leading
3029 // membar it's possible for a simple Dekker test to fail if loads
3030 // use LDR;DMB but stores use STLR. This can happen if C2 compiles
3031 // the stores in one method and we interpret the loads in another.
3032 if (!CompilerConfig::is_c1_or_interpreter_only_no_jvmci()) {
3033 Label notVolatile;
3034 __ tbz(r3, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
3035 __ membar(MacroAssembler::AnyAny);
3036 __ bind(notVolatile);
3037 }
3038
3039 // access field
3040 switch (bytecode()) {
3041 case Bytecodes::_fast_agetfield:
3042 do_oop_load(_masm, field, r0, IN_HEAP);
3043 __ verify_oop(r0);
3044 break;
3045 case Bytecodes::_fast_lgetfield:
3046 __ access_load_at(T_LONG, IN_HEAP, r0, field, noreg, noreg);
3047 break;
3048 case Bytecodes::_fast_igetfield:
3049 __ access_load_at(T_INT, IN_HEAP, r0, field, noreg, noreg);
3050 break;
3051 case Bytecodes::_fast_bgetfield:
3052 __ access_load_at(T_BYTE, IN_HEAP, r0, field, noreg, noreg);
3053 break;
3054 case Bytecodes::_fast_sgetfield:
3055 __ access_load_at(T_SHORT, IN_HEAP, r0, field, noreg, noreg);
3056 break;
3057 case Bytecodes::_fast_cgetfield:
3058 __ access_load_at(T_CHAR, IN_HEAP, r0, field, noreg, noreg);
3059 break;
3060 case Bytecodes::_fast_fgetfield:
3061 __ access_load_at(T_FLOAT, IN_HEAP, noreg /* ftos */, field, noreg, noreg);
3062 break;
3063 case Bytecodes::_fast_dgetfield:
3064 __ access_load_at(T_DOUBLE, IN_HEAP, noreg /* dtos */, field, noreg, noreg);
3065 break;
3066 default:
3067 ShouldNotReachHere();
3068 }
3069 {
3070 Label notVolatile;
3071 __ tbz(r3, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
3072 __ membar(MacroAssembler::LoadLoad | MacroAssembler::LoadStore);
3073 __ bind(notVolatile);
3074 }
3075 }
3076
3077 void TemplateTable::fast_xaccess(TosState state)
3078 {
3079 transition(vtos, state);
3080
3081 // get receiver
3082 __ ldr(r0, aaddress(0));
3083 // access constant pool cache
3084 __ get_cache_and_index_at_bcp(r2, r3, 2);
3085 __ ldr(r1, Address(r2, in_bytes(ConstantPoolCache::base_offset() +
3086 ConstantPoolCacheEntry::f2_offset())));
3087
3088 // 8179954: We need to make sure that the code generated for
3089 // volatile accesses forms a sequentially-consistent set of
3090 // operations when combined with STLR and LDAR. Without a leading
3091 // membar it's possible for a simple Dekker test to fail if loads
3092 // use LDR;DMB but stores use STLR. This can happen if C2 compiles
3093 // the stores in one method and we interpret the loads in another.
3094 if (!CompilerConfig::is_c1_or_interpreter_only_no_jvmci()) {
3095 Label notVolatile;
3096 __ ldrw(r3, Address(r2, in_bytes(ConstantPoolCache::base_offset() +
3097 ConstantPoolCacheEntry::flags_offset())));
3098 __ tbz(r3, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
3099 __ membar(MacroAssembler::AnyAny);
3100 __ bind(notVolatile);
3101 }
3102
3103 // make sure exception is reported in correct bcp range (getfield is
3104 // next instruction)
3105 __ increment(rbcp);
3106 __ null_check(r0);
3107 switch (state) {
3108 case itos:
3109 __ access_load_at(T_INT, IN_HEAP, r0, Address(r0, r1, Address::lsl(0)), noreg, noreg);
3110 break;
3111 case atos:
3112 do_oop_load(_masm, Address(r0, r1, Address::lsl(0)), r0, IN_HEAP);
3113 __ verify_oop(r0);
3114 break;
3115 case ftos:
3116 __ access_load_at(T_FLOAT, IN_HEAP, noreg /* ftos */, Address(r0, r1, Address::lsl(0)), noreg, noreg);
3117 break;
3118 default:
3119 ShouldNotReachHere();
3120 }
3121
3122 {
3123 Label notVolatile;
3124 __ ldrw(r3, Address(r2, in_bytes(ConstantPoolCache::base_offset() +
3125 ConstantPoolCacheEntry::flags_offset())));
3126 __ tbz(r3, ConstantPoolCacheEntry::is_volatile_shift, notVolatile);
3127 __ membar(MacroAssembler::LoadLoad | MacroAssembler::LoadStore);
3128 __ bind(notVolatile);
3129 }
3130
3131 __ decrement(rbcp);
3132 }
3133
3134
3135
3136 //-----------------------------------------------------------------------------
3137 // Calls
3138
3139 void TemplateTable::prepare_invoke(int byte_no,
3140 Register method, // linked method (or i-klass)
3141 Register index, // itable index, MethodType, etc.
3142 Register recv, // if caller wants to see it
3143 Register flags // if caller wants to test it
3144 ) {
3145 // determine flags
3146 Bytecodes::Code code = bytecode();
3147 const bool is_invokeinterface = code == Bytecodes::_invokeinterface;
3148 const bool is_invokedynamic = code == Bytecodes::_invokedynamic;
3149 const bool is_invokehandle = code == Bytecodes::_invokehandle;
3150 const bool is_invokevirtual = code == Bytecodes::_invokevirtual;
3151 const bool is_invokespecial = code == Bytecodes::_invokespecial;
3152 const bool load_receiver = (recv != noreg);
3153 const bool save_flags = (flags != noreg);
3154 assert(load_receiver == (code != Bytecodes::_invokestatic && code != Bytecodes::_invokedynamic), "");
3155 assert(save_flags == (is_invokeinterface || is_invokevirtual), "need flags for vfinal");
3156 assert(flags == noreg || flags == r3, "");
3157 assert(recv == noreg || recv == r2, "");
3158
3159 // setup registers & access constant pool cache
3160 if (recv == noreg) recv = r2;
3161 if (flags == noreg) flags = r3;
3162 assert_different_registers(method, index, recv, flags);
3163
3164 // save 'interpreter return address'
3165 __ save_bcp();
3166
3167 load_invoke_cp_cache_entry(byte_no, method, index, flags, is_invokevirtual, false, is_invokedynamic);
3168
3169 // maybe push appendix to arguments (just before return address)
3170 if (is_invokedynamic || is_invokehandle) {
3171 Label L_no_push;
3172 __ tbz(flags, ConstantPoolCacheEntry::has_appendix_shift, L_no_push);
3173 // Push the appendix as a trailing parameter.
3174 // This must be done before we get the receiver,
3175 // since the parameter_size includes it.
3176 __ push(r19);
3177 __ mov(r19, index);
3178 __ load_resolved_reference_at_index(index, r19);
3179 __ pop(r19);
3180 __ push(index); // push appendix (MethodType, CallSite, etc.)
3181 __ bind(L_no_push);
3182 }
3183
3184 // load receiver if needed (note: no return address pushed yet)
3185 if (load_receiver) {
3186 __ andw(recv, flags, ConstantPoolCacheEntry::parameter_size_mask);
3187 // FIXME -- is this actually correct? looks like it should be 2
3188 // const int no_return_pc_pushed_yet = -1; // argument slot correction before we push return address
3189 // const int receiver_is_at_end = -1; // back off one slot to get receiver
3190 // Address recv_addr = __ argument_address(recv, no_return_pc_pushed_yet + receiver_is_at_end);
3191 // __ movptr(recv, recv_addr);
3192 __ add(rscratch1, esp, recv, ext::uxtx, 3); // FIXME: uxtb here?
3193 __ ldr(recv, Address(rscratch1, -Interpreter::expr_offset_in_bytes(1)));
3194 __ verify_oop(recv);
3195 }
3196
3197 // compute return type
3198 // x86 uses a shift and mask or wings it with a shift plus assert
3199 // the mask is not needed. aarch64 just uses bitfield extract
3200 __ ubfxw(rscratch2, flags, ConstantPoolCacheEntry::tos_state_shift, ConstantPoolCacheEntry::tos_state_bits);
3201 // load return address
3202 {
3203 const address table_addr = (address) Interpreter::invoke_return_entry_table_for(code);
3204 __ mov(rscratch1, table_addr);
3205 __ ldr(lr, Address(rscratch1, rscratch2, Address::lsl(3)));
3206 }
3207 }
3208
3209
3210 void TemplateTable::invokevirtual_helper(Register index,
3211 Register recv,
3212 Register flags)
3213 {
3214 // Uses temporary registers r0, r3
3215 assert_different_registers(index, recv, r0, r3);
3216 // Test for an invoke of a final method
3217 Label notFinal;
3218 __ tbz(flags, ConstantPoolCacheEntry::is_vfinal_shift, notFinal);
3219
3220 const Register method = index; // method must be rmethod
3221 assert(method == rmethod,
3222 "Method must be rmethod for interpreter calling convention");
3223
3224 // do the call - the index is actually the method to call
3225 // that is, f2 is a vtable index if !is_vfinal, else f2 is a Method*
3226
3227 // It's final, need a null check here!
3228 __ null_check(recv);
3229
3230 // profile this call
3231 __ profile_final_call(r0);
3232 __ profile_arguments_type(r0, method, r4, true);
3233
3234 __ jump_from_interpreted(method, r0);
3235
3236 __ bind(notFinal);
3237
3238 // get receiver klass
3239 __ load_klass_check_null(r0, recv);
3240
3241 // profile this call
3242 __ profile_virtual_call(r0, rlocals, r3);
3243
3244 // get target Method & entry point
3245 __ lookup_virtual_method(r0, index, method);
3246 __ profile_arguments_type(r3, method, r4, true);
3247 // FIXME -- this looks completely redundant. is it?
3248 // __ ldr(r3, Address(method, Method::interpreter_entry_offset()));
3249 __ jump_from_interpreted(method, r3);
3250 }
3251
3252 void TemplateTable::invokevirtual(int byte_no)
3253 {
3254 transition(vtos, vtos);
3255 assert(byte_no == f2_byte, "use this argument");
3256
3257 prepare_invoke(byte_no, rmethod, noreg, r2, r3);
3258
3259 // rmethod: index (actually a Method*)
3260 // r2: receiver
3261 // r3: flags
3262
3263 invokevirtual_helper(rmethod, r2, r3);
3264 }
3265
3266 void TemplateTable::invokespecial(int byte_no)
3267 {
3268 transition(vtos, vtos);
3269 assert(byte_no == f1_byte, "use this argument");
3270
3271 prepare_invoke(byte_no, rmethod, noreg, // get f1 Method*
3272 r2); // get receiver also for null check
3273 __ verify_oop(r2);
3274 __ null_check(r2);
3275 // do the call
3276 __ profile_call(r0);
3277 __ profile_arguments_type(r0, rmethod, rbcp, false);
3278 __ jump_from_interpreted(rmethod, r0);
3279 }
3280
3281 void TemplateTable::invokestatic(int byte_no)
3282 {
3283 transition(vtos, vtos);
3284 assert(byte_no == f1_byte, "use this argument");
3285
3286 prepare_invoke(byte_no, rmethod); // get f1 Method*
3287 // do the call
3288 __ profile_call(r0);
3289 __ profile_arguments_type(r0, rmethod, r4, false);
3290 __ jump_from_interpreted(rmethod, r0);
3291 }
3292
3293 void TemplateTable::fast_invokevfinal(int byte_no)
3294 {
3295 __ call_Unimplemented();
3296 }
3297
3298 void TemplateTable::invokeinterface(int byte_no) {
3299 transition(vtos, vtos);
3300 assert(byte_no == f1_byte, "use this argument");
3301
3302 prepare_invoke(byte_no, r0, rmethod, // get f1 Klass*, f2 Method*
3303 r2, r3); // recv, flags
3304
3305 // r0: interface klass (from f1)
3306 // rmethod: method (from f2)
3307 // r2: receiver
3308 // r3: flags
3309
3310 // First check for Object case, then private interface method,
3311 // then regular interface method.
3312
3313 // Special case of invokeinterface called for virtual method of
3314 // java.lang.Object. See cpCache.cpp for details.
3315 Label notObjectMethod;
3316 __ tbz(r3, ConstantPoolCacheEntry::is_forced_virtual_shift, notObjectMethod);
3317
3318 invokevirtual_helper(rmethod, r2, r3);
3319 __ bind(notObjectMethod);
3320
3321 Label no_such_interface;
3322
3323 // Check for private method invocation - indicated by vfinal
3324 Label notVFinal;
3325 __ tbz(r3, ConstantPoolCacheEntry::is_vfinal_shift, notVFinal);
3326
3327 // Get receiver klass into r3 - also a null check
3328 __ load_klass_check_null(r3, r2);
3329
3330 Label subtype;
3331 __ check_klass_subtype(r3, r0, r4, subtype);
3332 // If we get here the typecheck failed
3333 __ b(no_such_interface);
3334 __ bind(subtype);
3335
3336 __ profile_final_call(r0);
3337 __ profile_arguments_type(r0, rmethod, r4, true);
3338 __ jump_from_interpreted(rmethod, r0);
3339
3340 __ bind(notVFinal);
3341
3342 // Get receiver klass into r3 - also a null check
3343 __ restore_locals();
3344 __ load_klass_check_null(r3, r2);
3345
3346 Label no_such_method;
3347
3348 // Preserve method for throw_AbstractMethodErrorVerbose.
3349 __ mov(r16, rmethod);
3350 // Receiver subtype check against REFC.
3351 // Superklass in r0. Subklass in r3. Blows rscratch2, r13
3352 __ lookup_interface_method(// inputs: rec. class, interface, itable index
3353 r3, r0, noreg,
3354 // outputs: scan temp. reg, scan temp. reg
3355 rscratch2, r13,
3356 no_such_interface,
3357 /*return_method=*/false);
3358
3359 // profile this call
3360 __ profile_virtual_call(r3, r13, r19);
3361
3362 // Get declaring interface class from method, and itable index
3363
3364 __ load_method_holder(r0, rmethod);
3365 __ ldrw(rmethod, Address(rmethod, Method::itable_index_offset()));
3366 __ subw(rmethod, rmethod, Method::itable_index_max);
3367 __ negw(rmethod, rmethod);
3368
3369 // Preserve recvKlass for throw_AbstractMethodErrorVerbose.
3370 __ mov(rlocals, r3);
3371 __ lookup_interface_method(// inputs: rec. class, interface, itable index
3372 rlocals, r0, rmethod,
3373 // outputs: method, scan temp. reg
3374 rmethod, r13,
3375 no_such_interface);
3376
3377 // rmethod,: Method to call
3378 // r2: receiver
3379 // Check for abstract method error
3380 // Note: This should be done more efficiently via a throw_abstract_method_error
3381 // interpreter entry point and a conditional jump to it in case of a null
3382 // method.
3383 __ cbz(rmethod, no_such_method);
3384
3385 __ profile_arguments_type(r3, rmethod, r13, true);
3386
3387 // do the call
3388 // r2: receiver
3389 // rmethod,: Method
3390 __ jump_from_interpreted(rmethod, r3);
3391 __ should_not_reach_here();
3392
3393 // exception handling code follows...
3394 // note: must restore interpreter registers to canonical
3395 // state for exception handling to work correctly!
3396
3397 __ bind(no_such_method);
3398 // throw exception
3399 __ restore_bcp(); // bcp must be correct for exception handler (was destroyed)
3400 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
3401 // Pass arguments for generating a verbose error message.
3402 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodErrorVerbose), r3, r16);
3403 // the call_VM checks for exception, so we should never return here.
3404 __ should_not_reach_here();
3405
3406 __ bind(no_such_interface);
3407 // throw exception
3408 __ restore_bcp(); // bcp must be correct for exception handler (was destroyed)
3409 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
3410 // Pass arguments for generating a verbose error message.
3411 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
3412 InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose), r3, r0);
3413 // the call_VM checks for exception, so we should never return here.
3414 __ should_not_reach_here();
3415 return;
3416 }
3417
3418 void TemplateTable::invokehandle(int byte_no) {
3419 transition(vtos, vtos);
3420 assert(byte_no == f1_byte, "use this argument");
3421
3422 prepare_invoke(byte_no, rmethod, r0, r2);
3423 __ verify_method_ptr(r2);
3424 __ verify_oop(r2);
3425 __ null_check(r2);
3426
3427 // FIXME: profile the LambdaForm also
3428
3429 // r13 is safe to use here as a scratch reg because it is about to
3430 // be clobbered by jump_from_interpreted().
3431 __ profile_final_call(r13);
3432 __ profile_arguments_type(r13, rmethod, r4, true);
3433
3434 __ jump_from_interpreted(rmethod, r0);
3435 }
3436
3437 void TemplateTable::invokedynamic(int byte_no) {
3438 transition(vtos, vtos);
3439 assert(byte_no == f1_byte, "use this argument");
3440
3441 prepare_invoke(byte_no, rmethod, r0);
3442
3443 // r0: CallSite object (from cpool->resolved_references[])
3444 // rmethod: MH.linkToCallSite method (from f2)
3445
3446 // Note: r0_callsite is already pushed by prepare_invoke
3447
3448 // %%% should make a type profile for any invokedynamic that takes a ref argument
3449 // profile this call
3450 __ profile_call(rbcp);
3451 __ profile_arguments_type(r3, rmethod, r13, false);
3452
3453 __ verify_oop(r0);
3454
3455 __ jump_from_interpreted(rmethod, r0);
3456 }
3457
3458
3459 //-----------------------------------------------------------------------------
3460 // Allocation
3461
3462 void TemplateTable::_new() {
3463 transition(vtos, atos);
3464
3465 __ get_unsigned_2_byte_index_at_bcp(r3, 1);
3466 Label slow_case;
3467 Label done;
3468 Label initialize_header;
3469
3470 __ get_cpool_and_tags(r4, r0);
3471 // Make sure the class we're about to instantiate has been resolved.
3472 // This is done before loading InstanceKlass to be consistent with the order
3473 // how Constant Pool is updated (see ConstantPool::klass_at_put)
3474 const int tags_offset = Array<u1>::base_offset_in_bytes();
3475 __ lea(rscratch1, Address(r0, r3, Address::lsl(0)));
3476 __ lea(rscratch1, Address(rscratch1, tags_offset));
3477 __ ldarb(rscratch1, rscratch1);
3478 __ cmp(rscratch1, (u1)JVM_CONSTANT_Class);
3479 __ br(Assembler::NE, slow_case);
3480
3481 // get InstanceKlass
3482 __ load_resolved_klass_at_offset(r4, r3, r4, rscratch1);
3483
3484 // make sure klass is initialized & doesn't have finalizer
3485 // make sure klass is fully initialized
3486 __ ldrb(rscratch1, Address(r4, InstanceKlass::init_state_offset()));
3487 __ cmp(rscratch1, (u1)InstanceKlass::fully_initialized);
3488 __ br(Assembler::NE, slow_case);
3489
3490 // get instance_size in InstanceKlass (scaled to a count of bytes)
3491 __ ldrw(r3,
3492 Address(r4,
3493 Klass::layout_helper_offset()));
3494 // test to see if it has a finalizer or is malformed in some way
3495 __ tbnz(r3, exact_log2(Klass::_lh_instance_slow_path_bit), slow_case);
3496
3497 // Allocate the instance:
3498 // If TLAB is enabled:
3499 // Try to allocate in the TLAB.
3500 // If fails, go to the slow path.
3501 // Initialize the allocation.
3502 // Exit.
3503 //
3504 // Go to slow path.
3505
3506 if (UseTLAB) {
3507 __ tlab_allocate(r0, r3, 0, noreg, r1, slow_case);
3508
3509 if (ZeroTLAB) {
3510 // the fields have been already cleared
3511 __ b(initialize_header);
3512 }
3513
3514 // The object is initialized before the header. If the object size is
3515 // zero, go directly to the header initialization.
3516 __ sub(r3, r3, sizeof(oopDesc));
3517 __ cbz(r3, initialize_header);
3518
3519 // Initialize object fields
3520 {
3521 __ add(r2, r0, sizeof(oopDesc));
3522 Label loop;
3523 __ bind(loop);
3524 __ str(zr, Address(__ post(r2, BytesPerLong)));
3525 __ sub(r3, r3, BytesPerLong);
3526 __ cbnz(r3, loop);
3527 }
3528
3529 // initialize object header only.
3530 __ bind(initialize_header);
3531 __ mov(rscratch1, (intptr_t)markWord::prototype().value());
3532 __ str(rscratch1, Address(r0, oopDesc::mark_offset_in_bytes()));
3533 __ store_klass_gap(r0, zr); // zero klass gap for compressed oops
3534 __ store_klass(r0, r4); // store klass last
3535
3536 {
3537 SkipIfEqual skip(_masm, &DTraceAllocProbes, false);
3538 // Trigger dtrace event for fastpath
3539 __ push(atos); // save the return value
3540 __ call_VM_leaf(
3541 CAST_FROM_FN_PTR(address, static_cast<int (*)(oopDesc*)>(SharedRuntime::dtrace_object_alloc)), r0);
3542 __ pop(atos); // restore the return value
3543
3544 }
3545 __ b(done);
3546 }
3547
3548 // slow case
3549 __ bind(slow_case);
3550 __ get_constant_pool(c_rarg1);
3551 __ get_unsigned_2_byte_index_at_bcp(c_rarg2, 1);
3552 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::_new), c_rarg1, c_rarg2);
3553 __ verify_oop(r0);
3554
3555 // continue
3556 __ bind(done);
3557 // Must prevent reordering of stores for object initialization with stores that publish the new object.
3558 __ membar(Assembler::StoreStore);
3559 }
3560
3561 void TemplateTable::newarray() {
3562 transition(itos, atos);
3563 __ load_unsigned_byte(c_rarg1, at_bcp(1));
3564 __ mov(c_rarg2, r0);
3565 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::newarray),
3566 c_rarg1, c_rarg2);
3567 // Must prevent reordering of stores for object initialization with stores that publish the new object.
3568 __ membar(Assembler::StoreStore);
3569 }
3570
3571 void TemplateTable::anewarray() {
3572 transition(itos, atos);
3573 __ get_unsigned_2_byte_index_at_bcp(c_rarg2, 1);
3574 __ get_constant_pool(c_rarg1);
3575 __ mov(c_rarg3, r0);
3576 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::anewarray),
3577 c_rarg1, c_rarg2, c_rarg3);
3578 // Must prevent reordering of stores for object initialization with stores that publish the new object.
3579 __ membar(Assembler::StoreStore);
3580 }
3581
3582 void TemplateTable::arraylength() {
3583 transition(atos, itos);
3584 __ null_check(r0, arrayOopDesc::length_offset_in_bytes());
3585 __ ldrw(r0, Address(r0, arrayOopDesc::length_offset_in_bytes()));
3586 }
3587
3588 void TemplateTable::checkcast()
3589 {
3590 transition(atos, atos);
3591 Label done, is_null, ok_is_subtype, quicked, resolved;
3592 __ cbz(r0, is_null);
3593
3594 // Get cpool & tags index
3595 __ get_cpool_and_tags(r2, r3); // r2=cpool, r3=tags array
3596 __ get_unsigned_2_byte_index_at_bcp(r19, 1); // r19=index
3597 // See if bytecode has already been quicked
3598 __ add(rscratch1, r3, Array<u1>::base_offset_in_bytes());
3599 __ lea(r1, Address(rscratch1, r19));
3600 __ ldarb(r1, r1);
3601 __ cmp(r1, (u1)JVM_CONSTANT_Class);
3602 __ br(Assembler::EQ, quicked);
3603
3604 __ push(atos); // save receiver for result, and for GC
3605 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc));
3606 // vm_result_2 has metadata result
3607 __ get_vm_result_2(r0, rthread);
3608 __ pop(r3); // restore receiver
3609 __ b(resolved);
3610
3611 // Get superklass in r0 and subklass in r3
3612 __ bind(quicked);
3613 __ mov(r3, r0); // Save object in r3; r0 needed for subtype check
3614 __ load_resolved_klass_at_offset(r2, r19, r0, rscratch1); // r0 = klass
3615
3616 __ bind(resolved);
3617 __ load_klass(r19, r3);
3618
3619 // Generate subtype check. Blows r2, r5. Object in r3.
3620 // Superklass in r0. Subklass in r19.
3621 __ gen_subtype_check(r19, ok_is_subtype);
3622
3623 // Come here on failure
3624 __ push(r3);
3625 // object is at TOS
3626 __ b(Interpreter::_throw_ClassCastException_entry);
3627
3628 // Come here on success
3629 __ bind(ok_is_subtype);
3630 __ mov(r0, r3); // Restore object in r3
3631
3632 // Collect counts on whether this test sees NULLs a lot or not.
3633 if (ProfileInterpreter) {
3634 __ b(done);
3635 __ bind(is_null);
3636 __ profile_null_seen(r2);
3637 } else {
3638 __ bind(is_null); // same as 'done'
3639 }
3640 __ bind(done);
3641 }
3642
3643 void TemplateTable::instanceof() {
3644 transition(atos, itos);
3645 Label done, is_null, ok_is_subtype, quicked, resolved;
3646 __ cbz(r0, is_null);
3647
3648 // Get cpool & tags index
3649 __ get_cpool_and_tags(r2, r3); // r2=cpool, r3=tags array
3650 __ get_unsigned_2_byte_index_at_bcp(r19, 1); // r19=index
3651 // See if bytecode has already been quicked
3652 __ add(rscratch1, r3, Array<u1>::base_offset_in_bytes());
3653 __ lea(r1, Address(rscratch1, r19));
3654 __ ldarb(r1, r1);
3655 __ cmp(r1, (u1)JVM_CONSTANT_Class);
3656 __ br(Assembler::EQ, quicked);
3657
3658 __ push(atos); // save receiver for result, and for GC
3659 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc));
3660 // vm_result_2 has metadata result
3661 __ get_vm_result_2(r0, rthread);
3662 __ pop(r3); // restore receiver
3663 __ verify_oop(r3);
3664 __ load_klass(r3, r3);
3665 __ b(resolved);
3666
3667 // Get superklass in r0 and subklass in r3
3668 __ bind(quicked);
3669 __ load_klass(r3, r0);
3670 __ load_resolved_klass_at_offset(r2, r19, r0, rscratch1);
3671
3672 __ bind(resolved);
3673
3674 // Generate subtype check. Blows r2, r5
3675 // Superklass in r0. Subklass in r3.
3676 __ gen_subtype_check(r3, ok_is_subtype);
3677
3678 // Come here on failure
3679 __ mov(r0, 0);
3680 __ b(done);
3681 // Come here on success
3682 __ bind(ok_is_subtype);
3683 __ mov(r0, 1);
3684
3685 // Collect counts on whether this test sees NULLs a lot or not.
3686 if (ProfileInterpreter) {
3687 __ b(done);
3688 __ bind(is_null);
3689 __ profile_null_seen(r2);
3690 } else {
3691 __ bind(is_null); // same as 'done'
3692 }
3693 __ bind(done);
3694 // r0 = 0: obj == NULL or obj is not an instanceof the specified klass
3695 // r0 = 1: obj != NULL and obj is an instanceof the specified klass
3696 }
3697
3698 //-----------------------------------------------------------------------------
3699 // Breakpoints
3700 void TemplateTable::_breakpoint() {
3701 // Note: We get here even if we are single stepping..
3702 // jbug inists on setting breakpoints at every bytecode
3703 // even if we are in single step mode.
3704
3705 transition(vtos, vtos);
3706
3707 // get the unpatched byte code
3708 __ get_method(c_rarg1);
3709 __ call_VM(noreg,
3710 CAST_FROM_FN_PTR(address,
3711 InterpreterRuntime::get_original_bytecode_at),
3712 c_rarg1, rbcp);
3713 __ mov(r19, r0);
3714
3715 // post the breakpoint event
3716 __ call_VM(noreg,
3717 CAST_FROM_FN_PTR(address, InterpreterRuntime::_breakpoint),
3718 rmethod, rbcp);
3719
3720 // complete the execution of original bytecode
3721 __ mov(rscratch1, r19);
3722 __ dispatch_only_normal(vtos);
3723 }
3724
3725 //-----------------------------------------------------------------------------
3726 // Exceptions
3727
3728 void TemplateTable::athrow() {
3729 transition(atos, vtos);
3730 __ null_check(r0);
3731 __ b(Interpreter::throw_exception_entry());
3732 }
3733
3734 //-----------------------------------------------------------------------------
3735 // Synchronization
3736 //
3737 // Note: monitorenter & exit are symmetric routines; which is reflected
3738 // in the assembly code structure as well
3739 //
3740 // Stack layout:
3741 //
3742 // [expressions ] <--- esp = expression stack top
3743 // ..
3744 // [expressions ]
3745 // [monitor entry] <--- monitor block top = expression stack bot
3746 // ..
3747 // [monitor entry]
3748 // [frame data ] <--- monitor block bot
3749 // ...
3750 // [saved rfp ] <--- rfp
3751 void TemplateTable::monitorenter()
3752 {
3753 transition(atos, vtos);
3754
3755 // check for NULL object
3756 __ null_check(r0);
3757
3758 const Address monitor_block_top(
3759 rfp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
3760 const Address monitor_block_bot(
3761 rfp, frame::interpreter_frame_initial_sp_offset * wordSize);
3762 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
3763
3764 Label allocated;
3765
3766 // initialize entry pointer
3767 __ mov(c_rarg1, zr); // points to free slot or NULL
3768
3769 // find a free slot in the monitor block (result in c_rarg1)
3770 {
3771 Label entry, loop, exit;
3772 __ ldr(c_rarg3, monitor_block_top); // points to current entry,
3773 // starting with top-most entry
3774 __ lea(c_rarg2, monitor_block_bot); // points to word before bottom
3775
3776 __ b(entry);
3777
3778 __ bind(loop);
3779 // check if current entry is used
3780 // if not used then remember entry in c_rarg1
3781 __ ldr(rscratch1, Address(c_rarg3, BasicObjectLock::obj_offset_in_bytes()));
3782 __ cmp(zr, rscratch1);
3783 __ csel(c_rarg1, c_rarg3, c_rarg1, Assembler::EQ);
3784 // check if current entry is for same object
3785 __ cmp(r0, rscratch1);
3786 // if same object then stop searching
3787 __ br(Assembler::EQ, exit);
3788 // otherwise advance to next entry
3789 __ add(c_rarg3, c_rarg3, entry_size);
3790 __ bind(entry);
3791 // check if bottom reached
3792 __ cmp(c_rarg3, c_rarg2);
3793 // if not at bottom then check this entry
3794 __ br(Assembler::NE, loop);
3795 __ bind(exit);
3796 }
3797
3798 __ cbnz(c_rarg1, allocated); // check if a slot has been found and
3799 // if found, continue with that on
3800
3801 // allocate one if there's no free slot
3802 {
3803 Label entry, loop;
3804 // 1. compute new pointers // rsp: old expression stack top
3805
3806 __ check_extended_sp();
3807 __ sub(sp, sp, entry_size); // make room for the monitor
3808 __ mov(rscratch1, sp);
3809 __ str(rscratch1, Address(rfp, frame::interpreter_frame_extended_sp_offset * wordSize));
3810
3811 __ ldr(c_rarg1, monitor_block_bot); // c_rarg1: old expression stack bottom
3812 __ sub(esp, esp, entry_size); // move expression stack top
3813 __ sub(c_rarg1, c_rarg1, entry_size); // move expression stack bottom
3814 __ mov(c_rarg3, esp); // set start value for copy loop
3815 __ str(c_rarg1, monitor_block_bot); // set new monitor block bottom
3816
3817 __ b(entry);
3818 // 2. move expression stack contents
3819 __ bind(loop);
3820 __ ldr(c_rarg2, Address(c_rarg3, entry_size)); // load expression stack
3821 // word from old location
3822 __ str(c_rarg2, Address(c_rarg3, 0)); // and store it at new location
3823 __ add(c_rarg3, c_rarg3, wordSize); // advance to next word
3824 __ bind(entry);
3825 __ cmp(c_rarg3, c_rarg1); // check if bottom reached
3826 __ br(Assembler::NE, loop); // if not at bottom then
3827 // copy next word
3828 }
3829
3830 // call run-time routine
3831 // c_rarg1: points to monitor entry
3832 __ bind(allocated);
3833
3834 // Increment bcp to point to the next bytecode, so exception
3835 // handling for async. exceptions work correctly.
3836 // The object has already been popped from the stack, so the
3837 // expression stack looks correct.
3838 __ increment(rbcp);
3839
3840 // store object
3841 __ str(r0, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()));
3842 __ lock_object(c_rarg1);
3843
3844 // check to make sure this monitor doesn't cause stack overflow after locking
3845 __ save_bcp(); // in case of exception
3846 __ generate_stack_overflow_check(0);
3847
3848 // The bcp has already been incremented. Just need to dispatch to
3849 // next instruction.
3850 __ dispatch_next(vtos);
3851 }
3852
3853
3854 void TemplateTable::monitorexit()
3855 {
3856 transition(atos, vtos);
3857
3858 // check for NULL object
3859 __ null_check(r0);
3860
3861 const Address monitor_block_top(
3862 rfp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
3863 const Address monitor_block_bot(
3864 rfp, frame::interpreter_frame_initial_sp_offset * wordSize);
3865 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
3866
3867 Label found;
3868
3869 // find matching slot
3870 {
3871 Label entry, loop;
3872 __ ldr(c_rarg1, monitor_block_top); // points to current entry,
3873 // starting with top-most entry
3874 __ lea(c_rarg2, monitor_block_bot); // points to word before bottom
3875 // of monitor block
3876 __ b(entry);
3877
3878 __ bind(loop);
3879 // check if current entry is for same object
3880 __ ldr(rscratch1, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()));
3881 __ cmp(r0, rscratch1);
3882 // if same object then stop searching
3883 __ br(Assembler::EQ, found);
3884 // otherwise advance to next entry
3885 __ add(c_rarg1, c_rarg1, entry_size);
3886 __ bind(entry);
3887 // check if bottom reached
3888 __ cmp(c_rarg1, c_rarg2);
3889 // if not at bottom then check this entry
3890 __ br(Assembler::NE, loop);
3891 }
3892
3893 // error handling. Unlocking was not block-structured
3894 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
3895 InterpreterRuntime::throw_illegal_monitor_state_exception));
3896 __ should_not_reach_here();
3897
3898 // call run-time routine
3899 __ bind(found);
3900 __ push_ptr(r0); // make sure object is on stack (contract with oopMaps)
3901 __ unlock_object(c_rarg1);
3902 __ pop_ptr(r0); // discard object
3903 }
3904
3905
3906 // Wide instructions
3907 void TemplateTable::wide()
3908 {
3909 __ load_unsigned_byte(r19, at_bcp(1));
3910 __ mov(rscratch1, (address)Interpreter::_wentry_point);
3911 __ ldr(rscratch1, Address(rscratch1, r19, Address::uxtw(3)));
3912 __ br(rscratch1);
3913 }
3914
3915
3916 // Multi arrays
3917 void TemplateTable::multianewarray() {
3918 transition(vtos, atos);
3919 __ load_unsigned_byte(r0, at_bcp(3)); // get number of dimensions
3920 // last dim is on top of stack; we want address of first one:
3921 // first_addr = last_addr + (ndims - 1) * wordSize
3922 __ lea(c_rarg1, Address(esp, r0, Address::uxtw(3)));
3923 __ sub(c_rarg1, c_rarg1, wordSize);
3924 call_VM(r0,
3925 CAST_FROM_FN_PTR(address, InterpreterRuntime::multianewarray),
3926 c_rarg1);
3927 __ load_unsigned_byte(r1, at_bcp(3));
3928 __ lea(esp, Address(esp, r1, Address::uxtw(3)));
3929 }