1 /*
2 * Copyright (c) 2003, 2024, 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/disassembler.hpp"
29 #include "compiler/compilerDefinitions.inline.hpp"
30 #include "gc/shared/barrierSetAssembler.hpp"
31 #include "gc/shared/collectedHeap.hpp"
32 #include "gc/shared/tlab_globals.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "interpreter/interpreterRuntime.hpp"
35 #include "interpreter/interp_masm.hpp"
36 #include "interpreter/templateTable.hpp"
37 #include "memory/universe.hpp"
38 #include "oops/methodData.hpp"
39 #include "oops/method.inline.hpp"
40 #include "oops/objArrayKlass.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "oops/resolvedFieldEntry.hpp"
43 #include "oops/resolvedIndyEntry.hpp"
44 #include "oops/resolvedMethodEntry.hpp"
45 #include "prims/jvmtiExport.hpp"
46 #include "prims/methodHandles.hpp"
47 #include "runtime/frame.inline.hpp"
48 #include "runtime/sharedRuntime.hpp"
49 #include "runtime/stubRoutines.hpp"
50 #include "runtime/synchronizer.hpp"
51 #include "utilities/powerOfTwo.hpp"
52
53 #define __ Disassembler::hook<InterpreterMacroAssembler>(__FILE__, __LINE__, _masm)->
54
55 // Address computation: local variables
56
57 static inline Address iaddress(int n) {
58 return Address(rlocals, Interpreter::local_offset_in_bytes(n));
59 }
60
61 static inline Address laddress(int n) {
62 return iaddress(n + 1);
63 }
64
65 static inline Address faddress(int n) {
66 return iaddress(n);
67 }
68
69 static inline Address daddress(int n) {
70 return laddress(n);
71 }
72
73 static inline Address aaddress(int n) {
74 return iaddress(n);
75 }
76
77 static inline Address iaddress(Register r) {
78 return Address(rlocals, r, Address::lsl(3));
79 }
80
81 static inline Address laddress(Register r, Register scratch,
82 InterpreterMacroAssembler* _masm) {
83 __ lea(scratch, Address(rlocals, r, Address::lsl(3)));
84 return Address(scratch, Interpreter::local_offset_in_bytes(1));
85 }
86
87 static inline Address faddress(Register r) {
88 return iaddress(r);
89 }
90
91 static inline Address daddress(Register r, Register scratch,
92 InterpreterMacroAssembler* _masm) {
93 return laddress(r, scratch, _masm);
94 }
95
96 static inline Address aaddress(Register r) {
97 return iaddress(r);
98 }
99
100 static inline Address at_rsp() {
101 return Address(esp, 0);
102 }
103
104 // At top of Java expression stack which may be different than esp(). It
105 // isn't for category 1 objects.
106 static inline Address at_tos () {
107 return Address(esp, Interpreter::expr_offset_in_bytes(0));
108 }
109
110 static inline Address at_tos_p1() {
111 return Address(esp, Interpreter::expr_offset_in_bytes(1));
112 }
113
114 static inline Address at_tos_p2() {
115 return Address(esp, Interpreter::expr_offset_in_bytes(2));
116 }
117
118 static inline Address at_tos_p3() {
119 return Address(esp, Interpreter::expr_offset_in_bytes(3));
120 }
121
122 static inline Address at_tos_p4() {
123 return Address(esp, Interpreter::expr_offset_in_bytes(4));
124 }
125
126 static inline Address at_tos_p5() {
127 return Address(esp, Interpreter::expr_offset_in_bytes(5));
128 }
129
130 // Condition conversion
131 static Assembler::Condition j_not(TemplateTable::Condition cc) {
132 switch (cc) {
133 case TemplateTable::equal : return Assembler::NE;
134 case TemplateTable::not_equal : return Assembler::EQ;
135 case TemplateTable::less : return Assembler::GE;
136 case TemplateTable::less_equal : return Assembler::GT;
137 case TemplateTable::greater : return Assembler::LE;
138 case TemplateTable::greater_equal: return Assembler::LT;
139 }
140 ShouldNotReachHere();
141 return Assembler::EQ;
142 }
143
144
145 // Miscellaneous helper routines
146 // Store an oop (or null) at the Address described by obj.
147 // If val == noreg this means store a null
148 static void do_oop_store(InterpreterMacroAssembler* _masm,
149 Address dst,
150 Register val,
151 DecoratorSet decorators) {
152 assert(val == noreg || val == r0, "parameter is just for looks");
153 __ store_heap_oop(dst, val, r10, r11, r3, decorators);
154 }
155
156 static void do_oop_load(InterpreterMacroAssembler* _masm,
157 Address src,
158 Register dst,
159 DecoratorSet decorators) {
160 __ load_heap_oop(dst, src, r10, r11, decorators);
161 }
162
163 Address TemplateTable::at_bcp(int offset) {
164 assert(_desc->uses_bcp(), "inconsistent uses_bcp information");
165 return Address(rbcp, offset);
166 }
167
168 void TemplateTable::patch_bytecode(Bytecodes::Code bc, Register bc_reg,
169 Register temp_reg, bool load_bc_into_bc_reg/*=true*/,
170 int byte_no)
171 {
172 if (!RewriteBytecodes) return;
173 Label L_patch_done;
174
175 switch (bc) {
176 case Bytecodes::_fast_aputfield:
177 case Bytecodes::_fast_bputfield:
178 case Bytecodes::_fast_zputfield:
179 case Bytecodes::_fast_cputfield:
180 case Bytecodes::_fast_dputfield:
181 case Bytecodes::_fast_fputfield:
182 case Bytecodes::_fast_iputfield:
183 case Bytecodes::_fast_lputfield:
184 case Bytecodes::_fast_sputfield:
185 {
186 // We skip bytecode quickening for putfield instructions when
187 // the put_code written to the constant pool cache is zero.
188 // This is required so that every execution of this instruction
189 // calls out to InterpreterRuntime::resolve_get_put to do
190 // additional, required work.
191 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");
192 assert(load_bc_into_bc_reg, "we use bc_reg as temp");
193 __ load_field_entry(temp_reg, bc_reg);
194 if (byte_no == f1_byte) {
195 __ lea(temp_reg, Address(temp_reg, in_bytes(ResolvedFieldEntry::get_code_offset())));
196 } else {
197 __ lea(temp_reg, Address(temp_reg, in_bytes(ResolvedFieldEntry::put_code_offset())));
198 }
199 // Load-acquire the bytecode to match store-release in ResolvedFieldEntry::fill_in()
200 __ ldarb(temp_reg, temp_reg);
201 __ movw(bc_reg, bc);
202 __ cbzw(temp_reg, L_patch_done); // don't patch
203 }
204 break;
205 default:
206 assert(byte_no == -1, "sanity");
207 // the pair bytecodes have already done the load.
208 if (load_bc_into_bc_reg) {
209 __ movw(bc_reg, bc);
210 }
211 }
212
213 if (JvmtiExport::can_post_breakpoint()) {
214 Label L_fast_patch;
215 // if a breakpoint is present we can't rewrite the stream directly
216 __ load_unsigned_byte(temp_reg, at_bcp(0));
217 __ cmpw(temp_reg, Bytecodes::_breakpoint);
218 __ br(Assembler::NE, L_fast_patch);
219 // Let breakpoint table handling rewrite to quicker bytecode
220 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::set_original_bytecode_at), rmethod, rbcp, bc_reg);
221 __ b(L_patch_done);
222 __ bind(L_fast_patch);
223 }
224
225 #ifdef ASSERT
226 Label L_okay;
227 __ load_unsigned_byte(temp_reg, at_bcp(0));
228 __ cmpw(temp_reg, (int) Bytecodes::java_code(bc));
229 __ br(Assembler::EQ, L_okay);
230 __ cmpw(temp_reg, bc_reg);
231 __ br(Assembler::EQ, L_okay);
232 __ stop("patching the wrong bytecode");
233 __ bind(L_okay);
234 #endif
235
236 // patch bytecode
237 __ strb(bc_reg, at_bcp(0));
238 __ bind(L_patch_done);
239 }
240
241
242 // Individual instructions
243
244 void TemplateTable::nop() {
245 transition(vtos, vtos);
246 // nothing to do
247 }
248
249 void TemplateTable::shouldnotreachhere() {
250 transition(vtos, vtos);
251 __ stop("shouldnotreachhere bytecode");
252 }
253
254 void TemplateTable::aconst_null()
255 {
256 transition(vtos, atos);
257 __ mov(r0, 0);
258 }
259
260 void TemplateTable::iconst(int value)
261 {
262 transition(vtos, itos);
263 __ mov(r0, value);
264 }
265
266 void TemplateTable::lconst(int value)
267 {
268 __ mov(r0, value);
269 }
270
271 void TemplateTable::fconst(int value)
272 {
273 transition(vtos, ftos);
274 switch (value) {
275 case 0:
276 __ fmovs(v0, 0.0);
277 break;
278 case 1:
279 __ fmovs(v0, 1.0);
280 break;
281 case 2:
282 __ fmovs(v0, 2.0);
283 break;
284 default:
285 ShouldNotReachHere();
286 break;
287 }
288 }
289
290 void TemplateTable::dconst(int value)
291 {
292 transition(vtos, dtos);
293 switch (value) {
294 case 0:
295 __ fmovd(v0, 0.0);
296 break;
297 case 1:
298 __ fmovd(v0, 1.0);
299 break;
300 case 2:
301 __ fmovd(v0, 2.0);
302 break;
303 default:
304 ShouldNotReachHere();
305 break;
306 }
307 }
308
309 void TemplateTable::bipush()
310 {
311 transition(vtos, itos);
312 __ load_signed_byte32(r0, at_bcp(1));
313 }
314
315 void TemplateTable::sipush()
316 {
317 transition(vtos, itos);
318 __ load_unsigned_short(r0, at_bcp(1));
319 __ revw(r0, r0);
320 __ asrw(r0, r0, 16);
321 }
322
323 void TemplateTable::ldc(LdcType type)
324 {
325 transition(vtos, vtos);
326 Label call_ldc, notFloat, notClass, notInt, Done;
327
328 if (is_ldc_wide(type)) {
329 __ get_unsigned_2_byte_index_at_bcp(r1, 1);
330 } else {
331 __ load_unsigned_byte(r1, at_bcp(1));
332 }
333 __ get_cpool_and_tags(r2, r0);
334
335 const int base_offset = ConstantPool::header_size() * wordSize;
336 const int tags_offset = Array<u1>::base_offset_in_bytes();
337
338 // get type
339 __ add(r3, r1, tags_offset);
340 __ lea(r3, Address(r0, r3));
341 __ ldarb(r3, r3);
342
343 // unresolved class - get the resolved class
344 __ cmp(r3, (u1)JVM_CONSTANT_UnresolvedClass);
345 __ br(Assembler::EQ, call_ldc);
346
347 // unresolved class in error state - call into runtime to throw the error
348 // from the first resolution attempt
349 __ cmp(r3, (u1)JVM_CONSTANT_UnresolvedClassInError);
350 __ br(Assembler::EQ, call_ldc);
351
352 // resolved class - need to call vm to get java mirror of the class
353 __ cmp(r3, (u1)JVM_CONSTANT_Class);
354 __ br(Assembler::NE, notClass);
355
356 __ bind(call_ldc);
357 __ mov(c_rarg1, is_ldc_wide(type) ? 1 : 0);
358 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::ldc), c_rarg1);
359 __ push_ptr(r0);
360 __ verify_oop(r0);
361 __ b(Done);
362
363 __ bind(notClass);
364 __ cmp(r3, (u1)JVM_CONSTANT_Float);
365 __ br(Assembler::NE, notFloat);
366 // ftos
367 __ adds(r1, r2, r1, Assembler::LSL, 3);
368 __ ldrs(v0, Address(r1, base_offset));
369 __ push_f();
370 __ b(Done);
371
372 __ bind(notFloat);
373
374 __ cmp(r3, (u1)JVM_CONSTANT_Integer);
375 __ br(Assembler::NE, notInt);
376
377 // itos
378 __ adds(r1, r2, r1, Assembler::LSL, 3);
379 __ ldrw(r0, Address(r1, base_offset));
380 __ push_i(r0);
381 __ b(Done);
382
383 __ bind(notInt);
384 condy_helper(Done);
385
386 __ bind(Done);
387 }
388
389 // Fast path for caching oop constants.
390 void TemplateTable::fast_aldc(LdcType type)
391 {
392 transition(vtos, atos);
393
394 Register result = r0;
395 Register tmp = r1;
396 Register rarg = r2;
397
398 int index_size = is_ldc_wide(type) ? sizeof(u2) : sizeof(u1);
399
400 Label resolved;
401
402 // We are resolved if the resolved reference cache entry contains a
403 // non-null object (String, MethodType, etc.)
404 assert_different_registers(result, tmp);
405 __ get_cache_index_at_bcp(tmp, 1, index_size);
406 __ load_resolved_reference_at_index(result, tmp);
407 __ cbnz(result, resolved);
408
409 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc);
410
411 // first time invocation - must resolve first
412 __ mov(rarg, (int)bytecode());
413 __ call_VM(result, entry, rarg);
414
415 __ bind(resolved);
416
417 { // Check for the null sentinel.
418 // If we just called the VM, it already did the mapping for us,
419 // but it's harmless to retry.
420 Label notNull;
421
422 // Stash null_sentinel address to get its value later
423 __ movptr(rarg, (uintptr_t)Universe::the_null_sentinel_addr());
424 __ ldr(tmp, Address(rarg));
425 __ resolve_oop_handle(tmp, r5, rscratch2);
426 __ cmpoop(result, tmp);
427 __ br(Assembler::NE, notNull);
428 __ mov(result, 0); // null object reference
429 __ bind(notNull);
430 }
431
432 if (VerifyOops) {
433 // Safe to call with 0 result
434 __ verify_oop(result);
435 }
436 }
437
438 void TemplateTable::ldc2_w()
439 {
440 transition(vtos, vtos);
441 Label notDouble, notLong, Done;
442 __ get_unsigned_2_byte_index_at_bcp(r0, 1);
443
444 __ get_cpool_and_tags(r1, r2);
445 const int base_offset = ConstantPool::header_size() * wordSize;
446 const int tags_offset = Array<u1>::base_offset_in_bytes();
447
448 // get type
449 __ lea(r2, Address(r2, r0, Address::lsl(0)));
450 __ load_unsigned_byte(r2, Address(r2, tags_offset));
451 __ cmpw(r2, (int)JVM_CONSTANT_Double);
452 __ br(Assembler::NE, notDouble);
453
454 // dtos
455 __ lea (r2, Address(r1, r0, Address::lsl(3)));
456 __ ldrd(v0, Address(r2, base_offset));
457 __ push_d();
458 __ b(Done);
459
460 __ bind(notDouble);
461 __ cmpw(r2, (int)JVM_CONSTANT_Long);
462 __ br(Assembler::NE, notLong);
463
464 // ltos
465 __ lea(r0, Address(r1, r0, Address::lsl(3)));
466 __ ldr(r0, Address(r0, base_offset));
467 __ push_l();
468 __ b(Done);
469
470 __ bind(notLong);
471 condy_helper(Done);
472
473 __ bind(Done);
474 }
475
476 void TemplateTable::condy_helper(Label& Done)
477 {
478 Register obj = r0;
479 Register rarg = r1;
480 Register flags = r2;
481 Register off = r3;
482
483 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc);
484
485 __ mov(rarg, (int) bytecode());
486 __ call_VM(obj, entry, rarg);
487
488 __ get_vm_result_2(flags, rthread);
489
490 // VMr = obj = base address to find primitive value to push
491 // VMr2 = flags = (tos, off) using format of CPCE::_flags
492 __ mov(off, flags);
493 __ andw(off, off, ConstantPoolCache::field_index_mask);
494
495 const Address field(obj, off);
496
497 // What sort of thing are we loading?
498 // x86 uses a shift and mask or wings it with a shift plus assert
499 // the mask is not needed. aarch64 just uses bitfield extract
500 __ ubfxw(flags, flags, ConstantPoolCache::tos_state_shift,
501 ConstantPoolCache::tos_state_bits);
502
503 switch (bytecode()) {
504 case Bytecodes::_ldc:
505 case Bytecodes::_ldc_w:
506 {
507 // tos in (itos, ftos, stos, btos, ctos, ztos)
508 Label notInt, notFloat, notShort, notByte, notChar, notBool;
509 __ cmpw(flags, itos);
510 __ br(Assembler::NE, notInt);
511 // itos
512 __ ldrw(r0, field);
513 __ push(itos);
514 __ b(Done);
515
516 __ bind(notInt);
517 __ cmpw(flags, ftos);
518 __ br(Assembler::NE, notFloat);
519 // ftos
520 __ load_float(field);
521 __ push(ftos);
522 __ b(Done);
523
524 __ bind(notFloat);
525 __ cmpw(flags, stos);
526 __ br(Assembler::NE, notShort);
527 // stos
528 __ load_signed_short(r0, field);
529 __ push(stos);
530 __ b(Done);
531
532 __ bind(notShort);
533 __ cmpw(flags, btos);
534 __ br(Assembler::NE, notByte);
535 // btos
536 __ load_signed_byte(r0, field);
537 __ push(btos);
538 __ b(Done);
539
540 __ bind(notByte);
541 __ cmpw(flags, ctos);
542 __ br(Assembler::NE, notChar);
543 // ctos
544 __ load_unsigned_short(r0, field);
545 __ push(ctos);
546 __ b(Done);
547
548 __ bind(notChar);
549 __ cmpw(flags, ztos);
550 __ br(Assembler::NE, notBool);
551 // ztos
552 __ load_signed_byte(r0, field);
553 __ push(ztos);
554 __ b(Done);
555
556 __ bind(notBool);
557 break;
558 }
559
560 case Bytecodes::_ldc2_w:
561 {
562 Label notLong, notDouble;
563 __ cmpw(flags, ltos);
564 __ br(Assembler::NE, notLong);
565 // ltos
566 __ ldr(r0, field);
567 __ push(ltos);
568 __ b(Done);
569
570 __ bind(notLong);
571 __ cmpw(flags, dtos);
572 __ br(Assembler::NE, notDouble);
573 // dtos
574 __ load_double(field);
575 __ push(dtos);
576 __ b(Done);
577
578 __ bind(notDouble);
579 break;
580 }
581
582 default:
583 ShouldNotReachHere();
584 }
585
586 __ stop("bad ldc/condy");
587 }
588
589 void TemplateTable::locals_index(Register reg, int offset)
590 {
591 __ ldrb(reg, at_bcp(offset));
592 __ neg(reg, reg);
593 }
594
595 void TemplateTable::iload() {
596 iload_internal();
597 }
598
599 void TemplateTable::nofast_iload() {
600 iload_internal(may_not_rewrite);
601 }
602
603 void TemplateTable::iload_internal(RewriteControl rc) {
604 transition(vtos, itos);
605 if (RewriteFrequentPairs && rc == may_rewrite) {
606 Label rewrite, done;
607 Register bc = r4;
608
609 // get next bytecode
610 __ load_unsigned_byte(r1, at_bcp(Bytecodes::length_for(Bytecodes::_iload)));
611
612 // if _iload, wait to rewrite to iload2. We only want to rewrite the
613 // last two iloads in a pair. Comparing against fast_iload means that
614 // the next bytecode is neither an iload or a caload, and therefore
615 // an iload pair.
616 __ cmpw(r1, Bytecodes::_iload);
617 __ br(Assembler::EQ, done);
618
619 // if _fast_iload rewrite to _fast_iload2
620 __ cmpw(r1, Bytecodes::_fast_iload);
621 __ movw(bc, Bytecodes::_fast_iload2);
622 __ br(Assembler::EQ, rewrite);
623
624 // if _caload rewrite to _fast_icaload
625 __ cmpw(r1, Bytecodes::_caload);
626 __ movw(bc, Bytecodes::_fast_icaload);
627 __ br(Assembler::EQ, rewrite);
628
629 // else rewrite to _fast_iload
630 __ movw(bc, Bytecodes::_fast_iload);
631
632 // rewrite
633 // bc: new bytecode
634 __ bind(rewrite);
635 patch_bytecode(Bytecodes::_iload, bc, r1, false);
636 __ bind(done);
637
638 }
639
640 // do iload, get the local value into tos
641 locals_index(r1);
642 __ ldr(r0, iaddress(r1));
643
644 }
645
646 void TemplateTable::fast_iload2()
647 {
648 transition(vtos, itos);
649 locals_index(r1);
650 __ ldr(r0, iaddress(r1));
651 __ push(itos);
652 locals_index(r1, 3);
653 __ ldr(r0, iaddress(r1));
654 }
655
656 void TemplateTable::fast_iload()
657 {
658 transition(vtos, itos);
659 locals_index(r1);
660 __ ldr(r0, iaddress(r1));
661 }
662
663 void TemplateTable::lload()
664 {
665 transition(vtos, ltos);
666 __ ldrb(r1, at_bcp(1));
667 __ sub(r1, rlocals, r1, ext::uxtw, LogBytesPerWord);
668 __ ldr(r0, Address(r1, Interpreter::local_offset_in_bytes(1)));
669 }
670
671 void TemplateTable::fload()
672 {
673 transition(vtos, ftos);
674 locals_index(r1);
675 // n.b. we use ldrd here because this is a 64 bit slot
676 // this is comparable to the iload case
677 __ ldrd(v0, faddress(r1));
678 }
679
680 void TemplateTable::dload()
681 {
682 transition(vtos, dtos);
683 __ ldrb(r1, at_bcp(1));
684 __ sub(r1, rlocals, r1, ext::uxtw, LogBytesPerWord);
685 __ ldrd(v0, Address(r1, Interpreter::local_offset_in_bytes(1)));
686 }
687
688 void TemplateTable::aload()
689 {
690 transition(vtos, atos);
691 locals_index(r1);
692 __ ldr(r0, iaddress(r1));
693 }
694
695 void TemplateTable::locals_index_wide(Register reg) {
696 __ ldrh(reg, at_bcp(2));
697 __ rev16w(reg, reg);
698 __ neg(reg, reg);
699 }
700
701 void TemplateTable::wide_iload() {
702 transition(vtos, itos);
703 locals_index_wide(r1);
704 __ ldr(r0, iaddress(r1));
705 }
706
707 void TemplateTable::wide_lload()
708 {
709 transition(vtos, ltos);
710 __ ldrh(r1, at_bcp(2));
711 __ rev16w(r1, r1);
712 __ sub(r1, rlocals, r1, ext::uxtw, LogBytesPerWord);
713 __ ldr(r0, Address(r1, Interpreter::local_offset_in_bytes(1)));
714 }
715
716 void TemplateTable::wide_fload()
717 {
718 transition(vtos, ftos);
719 locals_index_wide(r1);
720 // n.b. we use ldrd here because this is a 64 bit slot
721 // this is comparable to the iload case
722 __ ldrd(v0, faddress(r1));
723 }
724
725 void TemplateTable::wide_dload()
726 {
727 transition(vtos, dtos);
728 __ ldrh(r1, at_bcp(2));
729 __ rev16w(r1, r1);
730 __ sub(r1, rlocals, r1, ext::uxtw, LogBytesPerWord);
731 __ ldrd(v0, Address(r1, Interpreter::local_offset_in_bytes(1)));
732 }
733
734 void TemplateTable::wide_aload()
735 {
736 transition(vtos, atos);
737 locals_index_wide(r1);
738 __ ldr(r0, aaddress(r1));
739 }
740
741 void TemplateTable::index_check(Register array, Register index)
742 {
743 // destroys r1, rscratch1
744 // sign extend index for use by indexed load
745 // __ movl2ptr(index, index);
746 // check index
747 Register length = rscratch1;
748 __ ldrw(length, Address(array, arrayOopDesc::length_offset_in_bytes()));
749 __ cmpw(index, length);
750 if (index != r1) {
751 // ??? convention: move aberrant index into r1 for exception message
752 assert(r1 != array, "different registers");
753 __ mov(r1, index);
754 }
755 Label ok;
756 __ br(Assembler::LO, ok);
757 // ??? convention: move array into r3 for exception message
758 __ mov(r3, array);
759 __ mov(rscratch1, Interpreter::_throw_ArrayIndexOutOfBoundsException_entry);
760 __ br(rscratch1);
761 __ bind(ok);
762 }
763
764 void TemplateTable::iaload()
765 {
766 transition(itos, itos);
767 __ mov(r1, r0);
768 __ pop_ptr(r0);
769 // r0: array
770 // r1: index
771 index_check(r0, r1); // leaves index in r1, kills rscratch1
772 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_INT) >> 2);
773 __ access_load_at(T_INT, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(2)), noreg, noreg);
774 }
775
776 void TemplateTable::laload()
777 {
778 transition(itos, ltos);
779 __ mov(r1, r0);
780 __ pop_ptr(r0);
781 // r0: array
782 // r1: index
783 index_check(r0, r1); // leaves index in r1, kills rscratch1
784 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_LONG) >> 3);
785 __ access_load_at(T_LONG, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(3)), noreg, noreg);
786 }
787
788 void TemplateTable::faload()
789 {
790 transition(itos, ftos);
791 __ mov(r1, r0);
792 __ pop_ptr(r0);
793 // r0: array
794 // r1: index
795 index_check(r0, r1); // leaves index in r1, kills rscratch1
796 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_FLOAT) >> 2);
797 __ access_load_at(T_FLOAT, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(2)), noreg, noreg);
798 }
799
800 void TemplateTable::daload()
801 {
802 transition(itos, dtos);
803 __ mov(r1, r0);
804 __ pop_ptr(r0);
805 // r0: array
806 // r1: index
807 index_check(r0, r1); // leaves index in r1, kills rscratch1
808 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_DOUBLE) >> 3);
809 __ access_load_at(T_DOUBLE, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(3)), noreg, noreg);
810 }
811
812 void TemplateTable::aaload()
813 {
814 transition(itos, atos);
815 __ mov(r1, r0);
816 __ pop_ptr(r0);
817 // r0: array
818 // r1: index
819 index_check(r0, r1); // leaves index in r1, kills rscratch1
820 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_OBJECT) >> LogBytesPerHeapOop);
821 do_oop_load(_masm,
822 Address(r0, r1, Address::uxtw(LogBytesPerHeapOop)),
823 r0,
824 IS_ARRAY);
825 }
826
827 void TemplateTable::baload()
828 {
829 transition(itos, itos);
830 __ mov(r1, r0);
831 __ pop_ptr(r0);
832 // r0: array
833 // r1: index
834 index_check(r0, r1); // leaves index in r1, kills rscratch1
835 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_BYTE) >> 0);
836 __ access_load_at(T_BYTE, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(0)), noreg, noreg);
837 }
838
839 void TemplateTable::caload()
840 {
841 transition(itos, itos);
842 __ mov(r1, r0);
843 __ pop_ptr(r0);
844 // r0: array
845 // r1: index
846 index_check(r0, r1); // leaves index in r1, kills rscratch1
847 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_CHAR) >> 1);
848 __ access_load_at(T_CHAR, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(1)), noreg, noreg);
849 }
850
851 // iload followed by caload frequent pair
852 void TemplateTable::fast_icaload()
853 {
854 transition(vtos, itos);
855 // load index out of locals
856 locals_index(r2);
857 __ ldr(r1, iaddress(r2));
858
859 __ pop_ptr(r0);
860
861 // r0: array
862 // r1: index
863 index_check(r0, r1); // leaves index in r1, kills rscratch1
864 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_CHAR) >> 1);
865 __ access_load_at(T_CHAR, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(1)), noreg, noreg);
866 }
867
868 void TemplateTable::saload()
869 {
870 transition(itos, itos);
871 __ mov(r1, r0);
872 __ pop_ptr(r0);
873 // r0: array
874 // r1: index
875 index_check(r0, r1); // leaves index in r1, kills rscratch1
876 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_SHORT) >> 1);
877 __ access_load_at(T_SHORT, IN_HEAP | IS_ARRAY, r0, Address(r0, r1, Address::uxtw(1)), noreg, noreg);
878 }
879
880 void TemplateTable::iload(int n)
881 {
882 transition(vtos, itos);
883 __ ldr(r0, iaddress(n));
884 }
885
886 void TemplateTable::lload(int n)
887 {
888 transition(vtos, ltos);
889 __ ldr(r0, laddress(n));
890 }
891
892 void TemplateTable::fload(int n)
893 {
894 transition(vtos, ftos);
895 __ ldrs(v0, faddress(n));
896 }
897
898 void TemplateTable::dload(int n)
899 {
900 transition(vtos, dtos);
901 __ ldrd(v0, daddress(n));
902 }
903
904 void TemplateTable::aload(int n)
905 {
906 transition(vtos, atos);
907 __ ldr(r0, iaddress(n));
908 }
909
910 void TemplateTable::aload_0() {
911 aload_0_internal();
912 }
913
914 void TemplateTable::nofast_aload_0() {
915 aload_0_internal(may_not_rewrite);
916 }
917
918 void TemplateTable::aload_0_internal(RewriteControl rc) {
919 // According to bytecode histograms, the pairs:
920 //
921 // _aload_0, _fast_igetfield
922 // _aload_0, _fast_agetfield
923 // _aload_0, _fast_fgetfield
924 //
925 // occur frequently. If RewriteFrequentPairs is set, the (slow)
926 // _aload_0 bytecode checks if the next bytecode is either
927 // _fast_igetfield, _fast_agetfield or _fast_fgetfield and then
928 // rewrites the current bytecode into a pair bytecode; otherwise it
929 // rewrites the current bytecode into _fast_aload_0 that doesn't do
930 // the pair check anymore.
931 //
932 // Note: If the next bytecode is _getfield, the rewrite must be
933 // delayed, otherwise we may miss an opportunity for a pair.
934 //
935 // Also rewrite frequent pairs
936 // aload_0, aload_1
937 // aload_0, iload_1
938 // These bytecodes with a small amount of code are most profitable
939 // to rewrite
940 if (RewriteFrequentPairs && rc == may_rewrite) {
941 Label rewrite, done;
942 const Register bc = r4;
943
944 // get next bytecode
945 __ load_unsigned_byte(r1, at_bcp(Bytecodes::length_for(Bytecodes::_aload_0)));
946
947 // if _getfield then wait with rewrite
948 __ cmpw(r1, Bytecodes::Bytecodes::_getfield);
949 __ br(Assembler::EQ, done);
950
951 // if _igetfield then rewrite to _fast_iaccess_0
952 assert(Bytecodes::java_code(Bytecodes::_fast_iaccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
953 __ cmpw(r1, Bytecodes::_fast_igetfield);
954 __ movw(bc, Bytecodes::_fast_iaccess_0);
955 __ br(Assembler::EQ, rewrite);
956
957 // if _agetfield then rewrite to _fast_aaccess_0
958 assert(Bytecodes::java_code(Bytecodes::_fast_aaccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
959 __ cmpw(r1, Bytecodes::_fast_agetfield);
960 __ movw(bc, Bytecodes::_fast_aaccess_0);
961 __ br(Assembler::EQ, rewrite);
962
963 // if _fgetfield then rewrite to _fast_faccess_0
964 assert(Bytecodes::java_code(Bytecodes::_fast_faccess_0) == Bytecodes::_aload_0, "fix bytecode definition");
965 __ cmpw(r1, Bytecodes::_fast_fgetfield);
966 __ movw(bc, Bytecodes::_fast_faccess_0);
967 __ br(Assembler::EQ, rewrite);
968
969 // else rewrite to _fast_aload0
970 assert(Bytecodes::java_code(Bytecodes::_fast_aload_0) == Bytecodes::_aload_0, "fix bytecode definition");
971 __ movw(bc, Bytecodes::Bytecodes::_fast_aload_0);
972
973 // rewrite
974 // bc: new bytecode
975 __ bind(rewrite);
976 patch_bytecode(Bytecodes::_aload_0, bc, r1, false);
977
978 __ bind(done);
979 }
980
981 // Do actual aload_0 (must do this after patch_bytecode which might call VM and GC might change oop).
982 aload(0);
983 }
984
985 void TemplateTable::istore()
986 {
987 transition(itos, vtos);
988 locals_index(r1);
989 // FIXME: We're being very pernickerty here storing a jint in a
990 // local with strw, which costs an extra instruction over what we'd
991 // be able to do with a simple str. We should just store the whole
992 // word.
993 __ lea(rscratch1, iaddress(r1));
994 __ strw(r0, Address(rscratch1));
995 }
996
997 void TemplateTable::lstore()
998 {
999 transition(ltos, vtos);
1000 locals_index(r1);
1001 __ str(r0, laddress(r1, rscratch1, _masm));
1002 }
1003
1004 void TemplateTable::fstore() {
1005 transition(ftos, vtos);
1006 locals_index(r1);
1007 __ lea(rscratch1, iaddress(r1));
1008 __ strs(v0, Address(rscratch1));
1009 }
1010
1011 void TemplateTable::dstore() {
1012 transition(dtos, vtos);
1013 locals_index(r1);
1014 __ strd(v0, daddress(r1, rscratch1, _masm));
1015 }
1016
1017 void TemplateTable::astore()
1018 {
1019 transition(vtos, vtos);
1020 __ pop_ptr(r0);
1021 locals_index(r1);
1022 __ str(r0, aaddress(r1));
1023 }
1024
1025 void TemplateTable::wide_istore() {
1026 transition(vtos, vtos);
1027 __ pop_i();
1028 locals_index_wide(r1);
1029 __ lea(rscratch1, iaddress(r1));
1030 __ strw(r0, Address(rscratch1));
1031 }
1032
1033 void TemplateTable::wide_lstore() {
1034 transition(vtos, vtos);
1035 __ pop_l();
1036 locals_index_wide(r1);
1037 __ str(r0, laddress(r1, rscratch1, _masm));
1038 }
1039
1040 void TemplateTable::wide_fstore() {
1041 transition(vtos, vtos);
1042 __ pop_f();
1043 locals_index_wide(r1);
1044 __ lea(rscratch1, faddress(r1));
1045 __ strs(v0, rscratch1);
1046 }
1047
1048 void TemplateTable::wide_dstore() {
1049 transition(vtos, vtos);
1050 __ pop_d();
1051 locals_index_wide(r1);
1052 __ strd(v0, daddress(r1, rscratch1, _masm));
1053 }
1054
1055 void TemplateTable::wide_astore() {
1056 transition(vtos, vtos);
1057 __ pop_ptr(r0);
1058 locals_index_wide(r1);
1059 __ str(r0, aaddress(r1));
1060 }
1061
1062 void TemplateTable::iastore() {
1063 transition(itos, vtos);
1064 __ pop_i(r1);
1065 __ pop_ptr(r3);
1066 // r0: value
1067 // r1: index
1068 // r3: array
1069 index_check(r3, r1); // prefer index in r1
1070 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_INT) >> 2);
1071 __ access_store_at(T_INT, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(2)), r0, noreg, noreg, noreg);
1072 }
1073
1074 void TemplateTable::lastore() {
1075 transition(ltos, vtos);
1076 __ pop_i(r1);
1077 __ pop_ptr(r3);
1078 // r0: value
1079 // r1: index
1080 // r3: array
1081 index_check(r3, r1); // prefer index in r1
1082 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_LONG) >> 3);
1083 __ access_store_at(T_LONG, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(3)), r0, noreg, noreg, noreg);
1084 }
1085
1086 void TemplateTable::fastore() {
1087 transition(ftos, vtos);
1088 __ pop_i(r1);
1089 __ pop_ptr(r3);
1090 // v0: value
1091 // r1: index
1092 // r3: array
1093 index_check(r3, r1); // prefer index in r1
1094 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_FLOAT) >> 2);
1095 __ access_store_at(T_FLOAT, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(2)), noreg /* ftos */, noreg, noreg, noreg);
1096 }
1097
1098 void TemplateTable::dastore() {
1099 transition(dtos, vtos);
1100 __ pop_i(r1);
1101 __ pop_ptr(r3);
1102 // v0: value
1103 // r1: index
1104 // r3: array
1105 index_check(r3, r1); // prefer index in r1
1106 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_DOUBLE) >> 3);
1107 __ access_store_at(T_DOUBLE, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(3)), noreg /* dtos */, noreg, noreg, noreg);
1108 }
1109
1110 void TemplateTable::aastore() {
1111 Label is_null, ok_is_subtype, done;
1112 transition(vtos, vtos);
1113 // stack: ..., array, index, value
1114 __ ldr(r0, at_tos()); // value
1115 __ ldr(r2, at_tos_p1()); // index
1116 __ ldr(r3, at_tos_p2()); // array
1117
1118 Address element_address(r3, r4, Address::uxtw(LogBytesPerHeapOop));
1119
1120 index_check(r3, r2); // kills r1
1121 __ add(r4, r2, arrayOopDesc::base_offset_in_bytes(T_OBJECT) >> LogBytesPerHeapOop);
1122
1123 // do array store check - check for null value first
1124 __ cbz(r0, is_null);
1125
1126 // Move subklass into r1
1127 __ load_klass(r1, r0);
1128 // Move superklass into r0
1129 __ load_klass(r0, r3);
1130 __ ldr(r0, Address(r0,
1131 ObjArrayKlass::element_klass_offset()));
1132 // Compress array + index*oopSize + 12 into a single register. Frees r2.
1133
1134 // Generate subtype check. Blows r2, r5
1135 // Superklass in r0. Subklass in r1.
1136 __ gen_subtype_check(r1, ok_is_subtype);
1137
1138 // Come here on failure
1139 // object is at TOS
1140 __ b(Interpreter::_throw_ArrayStoreException_entry);
1141
1142 // Come here on success
1143 __ bind(ok_is_subtype);
1144
1145 // Get the value we will store
1146 __ ldr(r0, at_tos());
1147 // Now store using the appropriate barrier
1148 do_oop_store(_masm, element_address, r0, IS_ARRAY);
1149 __ b(done);
1150
1151 // Have a null in r0, r3=array, r2=index. Store null at ary[idx]
1152 __ bind(is_null);
1153 __ profile_null_seen(r2);
1154
1155 // Store a null
1156 do_oop_store(_masm, element_address, noreg, IS_ARRAY);
1157
1158 // Pop stack arguments
1159 __ bind(done);
1160 __ add(esp, esp, 3 * Interpreter::stackElementSize);
1161 }
1162
1163 void TemplateTable::bastore()
1164 {
1165 transition(itos, vtos);
1166 __ pop_i(r1);
1167 __ pop_ptr(r3);
1168 // r0: value
1169 // r1: index
1170 // r3: array
1171 index_check(r3, r1); // prefer index in r1
1172
1173 // Need to check whether array is boolean or byte
1174 // since both types share the bastore bytecode.
1175 __ load_klass(r2, r3);
1176 __ ldrw(r2, Address(r2, Klass::layout_helper_offset()));
1177 int diffbit_index = exact_log2(Klass::layout_helper_boolean_diffbit());
1178 Label L_skip;
1179 __ tbz(r2, diffbit_index, L_skip);
1180 __ andw(r0, r0, 1); // if it is a T_BOOLEAN array, mask the stored value to 0/1
1181 __ bind(L_skip);
1182
1183 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_BYTE) >> 0);
1184 __ access_store_at(T_BYTE, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(0)), r0, noreg, noreg, noreg);
1185 }
1186
1187 void TemplateTable::castore()
1188 {
1189 transition(itos, vtos);
1190 __ pop_i(r1);
1191 __ pop_ptr(r3);
1192 // r0: value
1193 // r1: index
1194 // r3: array
1195 index_check(r3, r1); // prefer index in r1
1196 __ add(r1, r1, arrayOopDesc::base_offset_in_bytes(T_CHAR) >> 1);
1197 __ access_store_at(T_CHAR, IN_HEAP | IS_ARRAY, Address(r3, r1, Address::uxtw(1)), r0, noreg, noreg, noreg);
1198 }
1199
1200 void TemplateTable::sastore()
1201 {
1202 castore();
1203 }
1204
1205 void TemplateTable::istore(int n)
1206 {
1207 transition(itos, vtos);
1208 __ str(r0, iaddress(n));
1209 }
1210
1211 void TemplateTable::lstore(int n)
1212 {
1213 transition(ltos, vtos);
1214 __ str(r0, laddress(n));
1215 }
1216
1217 void TemplateTable::fstore(int n)
1218 {
1219 transition(ftos, vtos);
1220 __ strs(v0, faddress(n));
1221 }
1222
1223 void TemplateTable::dstore(int n)
1224 {
1225 transition(dtos, vtos);
1226 __ strd(v0, daddress(n));
1227 }
1228
1229 void TemplateTable::astore(int n)
1230 {
1231 transition(vtos, vtos);
1232 __ pop_ptr(r0);
1233 __ str(r0, iaddress(n));
1234 }
1235
1236 void TemplateTable::pop()
1237 {
1238 transition(vtos, vtos);
1239 __ add(esp, esp, Interpreter::stackElementSize);
1240 }
1241
1242 void TemplateTable::pop2()
1243 {
1244 transition(vtos, vtos);
1245 __ add(esp, esp, 2 * Interpreter::stackElementSize);
1246 }
1247
1248 void TemplateTable::dup()
1249 {
1250 transition(vtos, vtos);
1251 __ ldr(r0, Address(esp, 0));
1252 __ push(r0);
1253 // stack: ..., a, a
1254 }
1255
1256 void TemplateTable::dup_x1()
1257 {
1258 transition(vtos, vtos);
1259 // stack: ..., a, b
1260 __ ldr(r0, at_tos()); // load b
1261 __ ldr(r2, at_tos_p1()); // load a
1262 __ str(r0, at_tos_p1()); // store b
1263 __ str(r2, at_tos()); // store a
1264 __ push(r0); // push b
1265 // stack: ..., b, a, b
1266 }
1267
1268 void TemplateTable::dup_x2()
1269 {
1270 transition(vtos, vtos);
1271 // stack: ..., a, b, c
1272 __ ldr(r0, at_tos()); // load c
1273 __ ldr(r2, at_tos_p2()); // load a
1274 __ str(r0, at_tos_p2()); // store c in a
1275 __ push(r0); // push c
1276 // stack: ..., c, b, c, c
1277 __ ldr(r0, at_tos_p2()); // load b
1278 __ str(r2, at_tos_p2()); // store a in b
1279 // stack: ..., c, a, c, c
1280 __ str(r0, at_tos_p1()); // store b in c
1281 // stack: ..., c, a, b, c
1282 }
1283
1284 void TemplateTable::dup2()
1285 {
1286 transition(vtos, vtos);
1287 // stack: ..., a, b
1288 __ ldr(r0, at_tos_p1()); // load a
1289 __ push(r0); // push a
1290 __ ldr(r0, at_tos_p1()); // load b
1291 __ push(r0); // push b
1292 // stack: ..., a, b, a, b
1293 }
1294
1295 void TemplateTable::dup2_x1()
1296 {
1297 transition(vtos, vtos);
1298 // stack: ..., a, b, c
1299 __ ldr(r2, at_tos()); // load c
1300 __ ldr(r0, at_tos_p1()); // load b
1301 __ push(r0); // push b
1302 __ push(r2); // push c
1303 // stack: ..., a, b, c, b, c
1304 __ str(r2, at_tos_p3()); // store c in b
1305 // stack: ..., a, c, c, b, c
1306 __ ldr(r2, at_tos_p4()); // load a
1307 __ str(r2, at_tos_p2()); // store a in 2nd c
1308 // stack: ..., a, c, a, b, c
1309 __ str(r0, at_tos_p4()); // store b in a
1310 // stack: ..., b, c, a, b, c
1311 }
1312
1313 void TemplateTable::dup2_x2()
1314 {
1315 transition(vtos, vtos);
1316 // stack: ..., a, b, c, d
1317 __ ldr(r2, at_tos()); // load d
1318 __ ldr(r0, at_tos_p1()); // load c
1319 __ push(r0) ; // push c
1320 __ push(r2); // push d
1321 // stack: ..., a, b, c, d, c, d
1322 __ ldr(r0, at_tos_p4()); // load b
1323 __ str(r0, at_tos_p2()); // store b in d
1324 __ str(r2, at_tos_p4()); // store d in b
1325 // stack: ..., a, d, c, b, c, d
1326 __ ldr(r2, at_tos_p5()); // load a
1327 __ ldr(r0, at_tos_p3()); // load c
1328 __ str(r2, at_tos_p3()); // store a in c
1329 __ str(r0, at_tos_p5()); // store c in a
1330 // stack: ..., c, d, a, b, c, d
1331 }
1332
1333 void TemplateTable::swap()
1334 {
1335 transition(vtos, vtos);
1336 // stack: ..., a, b
1337 __ ldr(r2, at_tos_p1()); // load a
1338 __ ldr(r0, at_tos()); // load b
1339 __ str(r2, at_tos()); // store a in b
1340 __ str(r0, at_tos_p1()); // store b in a
1341 // stack: ..., b, a
1342 }
1343
1344 void TemplateTable::iop2(Operation op)
1345 {
1346 transition(itos, itos);
1347 // r0 <== r1 op r0
1348 __ pop_i(r1);
1349 switch (op) {
1350 case add : __ addw(r0, r1, r0); break;
1351 case sub : __ subw(r0, r1, r0); break;
1352 case mul : __ mulw(r0, r1, r0); break;
1353 case _and : __ andw(r0, r1, r0); break;
1354 case _or : __ orrw(r0, r1, r0); break;
1355 case _xor : __ eorw(r0, r1, r0); break;
1356 case shl : __ lslvw(r0, r1, r0); break;
1357 case shr : __ asrvw(r0, r1, r0); break;
1358 case ushr : __ lsrvw(r0, r1, r0);break;
1359 default : ShouldNotReachHere();
1360 }
1361 }
1362
1363 void TemplateTable::lop2(Operation op)
1364 {
1365 transition(ltos, ltos);
1366 // r0 <== r1 op r0
1367 __ pop_l(r1);
1368 switch (op) {
1369 case add : __ add(r0, r1, r0); break;
1370 case sub : __ sub(r0, r1, r0); break;
1371 case mul : __ mul(r0, r1, r0); break;
1372 case _and : __ andr(r0, r1, r0); break;
1373 case _or : __ orr(r0, r1, r0); break;
1374 case _xor : __ eor(r0, r1, r0); break;
1375 default : ShouldNotReachHere();
1376 }
1377 }
1378
1379 void TemplateTable::idiv()
1380 {
1381 transition(itos, itos);
1382 // explicitly check for div0
1383 Label no_div0;
1384 __ cbnzw(r0, no_div0);
1385 __ mov(rscratch1, Interpreter::_throw_ArithmeticException_entry);
1386 __ br(rscratch1);
1387 __ bind(no_div0);
1388 __ pop_i(r1);
1389 // r0 <== r1 idiv r0
1390 __ corrected_idivl(r0, r1, r0, /* want_remainder */ false);
1391 }
1392
1393 void TemplateTable::irem()
1394 {
1395 transition(itos, itos);
1396 // explicitly check for div0
1397 Label no_div0;
1398 __ cbnzw(r0, no_div0);
1399 __ mov(rscratch1, Interpreter::_throw_ArithmeticException_entry);
1400 __ br(rscratch1);
1401 __ bind(no_div0);
1402 __ pop_i(r1);
1403 // r0 <== r1 irem r0
1404 __ corrected_idivl(r0, r1, r0, /* want_remainder */ true);
1405 }
1406
1407 void TemplateTable::lmul()
1408 {
1409 transition(ltos, ltos);
1410 __ pop_l(r1);
1411 __ mul(r0, r0, r1);
1412 }
1413
1414 void TemplateTable::ldiv()
1415 {
1416 transition(ltos, ltos);
1417 // explicitly check for div0
1418 Label no_div0;
1419 __ cbnz(r0, no_div0);
1420 __ mov(rscratch1, Interpreter::_throw_ArithmeticException_entry);
1421 __ br(rscratch1);
1422 __ bind(no_div0);
1423 __ pop_l(r1);
1424 // r0 <== r1 ldiv r0
1425 __ corrected_idivq(r0, r1, r0, /* want_remainder */ false);
1426 }
1427
1428 void TemplateTable::lrem()
1429 {
1430 transition(ltos, ltos);
1431 // explicitly check for div0
1432 Label no_div0;
1433 __ cbnz(r0, no_div0);
1434 __ mov(rscratch1, Interpreter::_throw_ArithmeticException_entry);
1435 __ br(rscratch1);
1436 __ bind(no_div0);
1437 __ pop_l(r1);
1438 // r0 <== r1 lrem r0
1439 __ corrected_idivq(r0, r1, r0, /* want_remainder */ true);
1440 }
1441
1442 void TemplateTable::lshl()
1443 {
1444 transition(itos, ltos);
1445 // shift count is in r0
1446 __ pop_l(r1);
1447 __ lslv(r0, r1, r0);
1448 }
1449
1450 void TemplateTable::lshr()
1451 {
1452 transition(itos, ltos);
1453 // shift count is in r0
1454 __ pop_l(r1);
1455 __ asrv(r0, r1, r0);
1456 }
1457
1458 void TemplateTable::lushr()
1459 {
1460 transition(itos, ltos);
1461 // shift count is in r0
1462 __ pop_l(r1);
1463 __ lsrv(r0, r1, r0);
1464 }
1465
1466 void TemplateTable::fop2(Operation op)
1467 {
1468 transition(ftos, ftos);
1469 switch (op) {
1470 case add:
1471 // n.b. use ldrd because this is a 64 bit slot
1472 __ pop_f(v1);
1473 __ fadds(v0, v1, v0);
1474 break;
1475 case sub:
1476 __ pop_f(v1);
1477 __ fsubs(v0, v1, v0);
1478 break;
1479 case mul:
1480 __ pop_f(v1);
1481 __ fmuls(v0, v1, v0);
1482 break;
1483 case div:
1484 __ pop_f(v1);
1485 __ fdivs(v0, v1, v0);
1486 break;
1487 case rem:
1488 __ fmovs(v1, v0);
1489 __ pop_f(v0);
1490 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::frem));
1491 break;
1492 default:
1493 ShouldNotReachHere();
1494 break;
1495 }
1496 }
1497
1498 void TemplateTable::dop2(Operation op)
1499 {
1500 transition(dtos, dtos);
1501 switch (op) {
1502 case add:
1503 // n.b. use ldrd because this is a 64 bit slot
1504 __ pop_d(v1);
1505 __ faddd(v0, v1, v0);
1506 break;
1507 case sub:
1508 __ pop_d(v1);
1509 __ fsubd(v0, v1, v0);
1510 break;
1511 case mul:
1512 __ pop_d(v1);
1513 __ fmuld(v0, v1, v0);
1514 break;
1515 case div:
1516 __ pop_d(v1);
1517 __ fdivd(v0, v1, v0);
1518 break;
1519 case rem:
1520 __ fmovd(v1, v0);
1521 __ pop_d(v0);
1522 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::drem));
1523 break;
1524 default:
1525 ShouldNotReachHere();
1526 break;
1527 }
1528 }
1529
1530 void TemplateTable::ineg()
1531 {
1532 transition(itos, itos);
1533 __ negw(r0, r0);
1534
1535 }
1536
1537 void TemplateTable::lneg()
1538 {
1539 transition(ltos, ltos);
1540 __ neg(r0, r0);
1541 }
1542
1543 void TemplateTable::fneg()
1544 {
1545 transition(ftos, ftos);
1546 __ fnegs(v0, v0);
1547 }
1548
1549 void TemplateTable::dneg()
1550 {
1551 transition(dtos, dtos);
1552 __ fnegd(v0, v0);
1553 }
1554
1555 void TemplateTable::iinc()
1556 {
1557 transition(vtos, vtos);
1558 __ load_signed_byte(r1, at_bcp(2)); // get constant
1559 locals_index(r2);
1560 __ ldr(r0, iaddress(r2));
1561 __ addw(r0, r0, r1);
1562 __ str(r0, iaddress(r2));
1563 }
1564
1565 void TemplateTable::wide_iinc()
1566 {
1567 transition(vtos, vtos);
1568 // __ mov(r1, zr);
1569 __ ldrw(r1, at_bcp(2)); // get constant and index
1570 __ rev16(r1, r1);
1571 __ ubfx(r2, r1, 0, 16);
1572 __ neg(r2, r2);
1573 __ sbfx(r1, r1, 16, 16);
1574 __ ldr(r0, iaddress(r2));
1575 __ addw(r0, r0, r1);
1576 __ str(r0, iaddress(r2));
1577 }
1578
1579 void TemplateTable::convert()
1580 {
1581 // Checking
1582 #ifdef ASSERT
1583 {
1584 TosState tos_in = ilgl;
1585 TosState tos_out = ilgl;
1586 switch (bytecode()) {
1587 case Bytecodes::_i2l: // fall through
1588 case Bytecodes::_i2f: // fall through
1589 case Bytecodes::_i2d: // fall through
1590 case Bytecodes::_i2b: // fall through
1591 case Bytecodes::_i2c: // fall through
1592 case Bytecodes::_i2s: tos_in = itos; break;
1593 case Bytecodes::_l2i: // fall through
1594 case Bytecodes::_l2f: // fall through
1595 case Bytecodes::_l2d: tos_in = ltos; break;
1596 case Bytecodes::_f2i: // fall through
1597 case Bytecodes::_f2l: // fall through
1598 case Bytecodes::_f2d: tos_in = ftos; break;
1599 case Bytecodes::_d2i: // fall through
1600 case Bytecodes::_d2l: // fall through
1601 case Bytecodes::_d2f: tos_in = dtos; break;
1602 default : ShouldNotReachHere();
1603 }
1604 switch (bytecode()) {
1605 case Bytecodes::_l2i: // fall through
1606 case Bytecodes::_f2i: // fall through
1607 case Bytecodes::_d2i: // fall through
1608 case Bytecodes::_i2b: // fall through
1609 case Bytecodes::_i2c: // fall through
1610 case Bytecodes::_i2s: tos_out = itos; break;
1611 case Bytecodes::_i2l: // fall through
1612 case Bytecodes::_f2l: // fall through
1613 case Bytecodes::_d2l: tos_out = ltos; break;
1614 case Bytecodes::_i2f: // fall through
1615 case Bytecodes::_l2f: // fall through
1616 case Bytecodes::_d2f: tos_out = ftos; break;
1617 case Bytecodes::_i2d: // fall through
1618 case Bytecodes::_l2d: // fall through
1619 case Bytecodes::_f2d: tos_out = dtos; break;
1620 default : ShouldNotReachHere();
1621 }
1622 transition(tos_in, tos_out);
1623 }
1624 #endif // ASSERT
1625 // static const int64_t is_nan = 0x8000000000000000L;
1626
1627 // Conversion
1628 switch (bytecode()) {
1629 case Bytecodes::_i2l:
1630 __ sxtw(r0, r0);
1631 break;
1632 case Bytecodes::_i2f:
1633 __ scvtfws(v0, r0);
1634 break;
1635 case Bytecodes::_i2d:
1636 __ scvtfwd(v0, r0);
1637 break;
1638 case Bytecodes::_i2b:
1639 __ sxtbw(r0, r0);
1640 break;
1641 case Bytecodes::_i2c:
1642 __ uxthw(r0, r0);
1643 break;
1644 case Bytecodes::_i2s:
1645 __ sxthw(r0, r0);
1646 break;
1647 case Bytecodes::_l2i:
1648 __ uxtw(r0, r0);
1649 break;
1650 case Bytecodes::_l2f:
1651 __ scvtfs(v0, r0);
1652 break;
1653 case Bytecodes::_l2d:
1654 __ scvtfd(v0, r0);
1655 break;
1656 case Bytecodes::_f2i:
1657 {
1658 Label L_Okay;
1659 __ clear_fpsr();
1660 __ fcvtzsw(r0, v0);
1661 __ get_fpsr(r1);
1662 __ cbzw(r1, L_Okay);
1663 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2i));
1664 __ bind(L_Okay);
1665 }
1666 break;
1667 case Bytecodes::_f2l:
1668 {
1669 Label L_Okay;
1670 __ clear_fpsr();
1671 __ fcvtzs(r0, v0);
1672 __ get_fpsr(r1);
1673 __ cbzw(r1, L_Okay);
1674 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2l));
1675 __ bind(L_Okay);
1676 }
1677 break;
1678 case Bytecodes::_f2d:
1679 __ fcvts(v0, v0);
1680 break;
1681 case Bytecodes::_d2i:
1682 {
1683 Label L_Okay;
1684 __ clear_fpsr();
1685 __ fcvtzdw(r0, v0);
1686 __ get_fpsr(r1);
1687 __ cbzw(r1, L_Okay);
1688 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2i));
1689 __ bind(L_Okay);
1690 }
1691 break;
1692 case Bytecodes::_d2l:
1693 {
1694 Label L_Okay;
1695 __ clear_fpsr();
1696 __ fcvtzd(r0, v0);
1697 __ get_fpsr(r1);
1698 __ cbzw(r1, L_Okay);
1699 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2l));
1700 __ bind(L_Okay);
1701 }
1702 break;
1703 case Bytecodes::_d2f:
1704 __ fcvtd(v0, v0);
1705 break;
1706 default:
1707 ShouldNotReachHere();
1708 }
1709 }
1710
1711 void TemplateTable::lcmp()
1712 {
1713 transition(ltos, itos);
1714 Label done;
1715 __ pop_l(r1);
1716 __ cmp(r1, r0);
1717 __ mov(r0, (uint64_t)-1L);
1718 __ br(Assembler::LT, done);
1719 // __ mov(r0, 1UL);
1720 // __ csel(r0, r0, zr, Assembler::NE);
1721 // and here is a faster way
1722 __ csinc(r0, zr, zr, Assembler::EQ);
1723 __ bind(done);
1724 }
1725
1726 void TemplateTable::float_cmp(bool is_float, int unordered_result)
1727 {
1728 Label done;
1729 if (is_float) {
1730 // XXX get rid of pop here, use ... reg, mem32
1731 __ pop_f(v1);
1732 __ fcmps(v1, v0);
1733 } else {
1734 // XXX get rid of pop here, use ... reg, mem64
1735 __ pop_d(v1);
1736 __ fcmpd(v1, v0);
1737 }
1738 if (unordered_result < 0) {
1739 // we want -1 for unordered or less than, 0 for equal and 1 for
1740 // greater than.
1741 __ mov(r0, (uint64_t)-1L);
1742 // for FP LT tests less than or unordered
1743 __ br(Assembler::LT, done);
1744 // install 0 for EQ otherwise 1
1745 __ csinc(r0, zr, zr, Assembler::EQ);
1746 } else {
1747 // we want -1 for less than, 0 for equal and 1 for unordered or
1748 // greater than.
1749 __ mov(r0, 1L);
1750 // for FP HI tests greater than or unordered
1751 __ br(Assembler::HI, done);
1752 // install 0 for EQ otherwise ~0
1753 __ csinv(r0, zr, zr, Assembler::EQ);
1754
1755 }
1756 __ bind(done);
1757 }
1758
1759 void TemplateTable::branch(bool is_jsr, bool is_wide)
1760 {
1761 __ profile_taken_branch(r0, r1);
1762 const ByteSize be_offset = MethodCounters::backedge_counter_offset() +
1763 InvocationCounter::counter_offset();
1764 const ByteSize inv_offset = MethodCounters::invocation_counter_offset() +
1765 InvocationCounter::counter_offset();
1766
1767 // load branch displacement
1768 if (!is_wide) {
1769 __ ldrh(r2, at_bcp(1));
1770 __ rev16(r2, r2);
1771 // sign extend the 16 bit value in r2
1772 __ sbfm(r2, r2, 0, 15);
1773 } else {
1774 __ ldrw(r2, at_bcp(1));
1775 __ revw(r2, r2);
1776 // sign extend the 32 bit value in r2
1777 __ sbfm(r2, r2, 0, 31);
1778 }
1779
1780 // Handle all the JSR stuff here, then exit.
1781 // It's much shorter and cleaner than intermingling with the non-JSR
1782 // normal-branch stuff occurring below.
1783
1784 if (is_jsr) {
1785 // Pre-load the next target bytecode into rscratch1
1786 __ load_unsigned_byte(rscratch1, Address(rbcp, r2));
1787 // compute return address as bci
1788 __ ldr(rscratch2, Address(rmethod, Method::const_offset()));
1789 __ add(rscratch2, rscratch2,
1790 in_bytes(ConstMethod::codes_offset()) - (is_wide ? 5 : 3));
1791 __ sub(r1, rbcp, rscratch2);
1792 __ push_i(r1);
1793 // Adjust the bcp by the 16-bit displacement in r2
1794 __ add(rbcp, rbcp, r2);
1795 __ dispatch_only(vtos, /*generate_poll*/true);
1796 return;
1797 }
1798
1799 // Normal (non-jsr) branch handling
1800
1801 // Adjust the bcp by the displacement in r2
1802 __ add(rbcp, rbcp, r2);
1803
1804 assert(UseLoopCounter || !UseOnStackReplacement,
1805 "on-stack-replacement requires loop counters");
1806 Label backedge_counter_overflow;
1807 Label dispatch;
1808 if (UseLoopCounter) {
1809 // increment backedge counter for backward branches
1810 // r0: MDO
1811 // w1: MDO bumped taken-count
1812 // r2: target offset
1813 __ cmp(r2, zr);
1814 __ br(Assembler::GT, dispatch); // count only if backward branch
1815
1816 // ECN: FIXME: This code smells
1817 // check if MethodCounters exists
1818 Label has_counters;
1819 __ ldr(rscratch1, Address(rmethod, Method::method_counters_offset()));
1820 __ cbnz(rscratch1, has_counters);
1821 __ push(r0);
1822 __ push(r1);
1823 __ push(r2);
1824 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
1825 InterpreterRuntime::build_method_counters), rmethod);
1826 __ pop(r2);
1827 __ pop(r1);
1828 __ pop(r0);
1829 __ ldr(rscratch1, Address(rmethod, Method::method_counters_offset()));
1830 __ cbz(rscratch1, dispatch); // No MethodCounters allocated, OutOfMemory
1831 __ bind(has_counters);
1832
1833 Label no_mdo;
1834 int increment = InvocationCounter::count_increment;
1835 if (ProfileInterpreter) {
1836 // Are we profiling?
1837 __ ldr(r1, Address(rmethod, in_bytes(Method::method_data_offset())));
1838 __ cbz(r1, no_mdo);
1839 // Increment the MDO backedge counter
1840 const Address mdo_backedge_counter(r1, in_bytes(MethodData::backedge_counter_offset()) +
1841 in_bytes(InvocationCounter::counter_offset()));
1842 const Address mask(r1, in_bytes(MethodData::backedge_mask_offset()));
1843 __ increment_mask_and_jump(mdo_backedge_counter, increment, mask,
1844 r0, rscratch1, false, Assembler::EQ,
1845 UseOnStackReplacement ? &backedge_counter_overflow : &dispatch);
1846 __ b(dispatch);
1847 }
1848 __ bind(no_mdo);
1849 // Increment backedge counter in MethodCounters*
1850 __ ldr(rscratch1, Address(rmethod, Method::method_counters_offset()));
1851 const Address mask(rscratch1, in_bytes(MethodCounters::backedge_mask_offset()));
1852 __ increment_mask_and_jump(Address(rscratch1, be_offset), increment, mask,
1853 r0, rscratch2, false, Assembler::EQ,
1854 UseOnStackReplacement ? &backedge_counter_overflow : &dispatch);
1855 __ bind(dispatch);
1856 }
1857
1858 // Pre-load the next target bytecode into rscratch1
1859 __ load_unsigned_byte(rscratch1, Address(rbcp, 0));
1860
1861 // continue with the bytecode @ target
1862 // rscratch1: target bytecode
1863 // rbcp: target bcp
1864 __ dispatch_only(vtos, /*generate_poll*/true);
1865
1866 if (UseLoopCounter && UseOnStackReplacement) {
1867 // invocation counter overflow
1868 __ bind(backedge_counter_overflow);
1869 __ neg(r2, r2);
1870 __ add(r2, r2, rbcp); // branch bcp
1871 // IcoResult frequency_counter_overflow([JavaThread*], address branch_bcp)
1872 __ call_VM(noreg,
1873 CAST_FROM_FN_PTR(address,
1874 InterpreterRuntime::frequency_counter_overflow),
1875 r2);
1876 __ load_unsigned_byte(r1, Address(rbcp, 0)); // restore target bytecode
1877
1878 // r0: osr nmethod (osr ok) or null (osr not possible)
1879 // w1: target bytecode
1880 // r2: scratch
1881 __ cbz(r0, dispatch); // test result -- no osr if null
1882 // nmethod may have been invalidated (VM may block upon call_VM return)
1883 __ ldrb(r2, Address(r0, nmethod::state_offset()));
1884 if (nmethod::in_use != 0)
1885 __ sub(r2, r2, nmethod::in_use);
1886 __ cbnz(r2, dispatch);
1887
1888 // We have the address of an on stack replacement routine in r0
1889 // We need to prepare to execute the OSR method. First we must
1890 // migrate the locals and monitors off of the stack.
1891
1892 __ mov(r19, r0); // save the nmethod
1893
1894 call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_begin));
1895
1896 // r0 is OSR buffer, move it to expected parameter location
1897 __ mov(j_rarg0, r0);
1898
1899 // remove activation
1900 // get sender esp
1901 __ ldr(esp,
1902 Address(rfp, frame::interpreter_frame_sender_sp_offset * wordSize));
1903 // remove frame anchor
1904 __ leave();
1905 // Ensure compiled code always sees stack at proper alignment
1906 __ andr(sp, esp, -16);
1907
1908 // and begin the OSR nmethod
1909 __ ldr(rscratch1, Address(r19, nmethod::osr_entry_point_offset()));
1910 __ br(rscratch1);
1911 }
1912 }
1913
1914
1915 void TemplateTable::if_0cmp(Condition cc)
1916 {
1917 transition(itos, vtos);
1918 // assume branch is more often taken than not (loops use backward branches)
1919 Label not_taken;
1920 if (cc == equal)
1921 __ cbnzw(r0, not_taken);
1922 else if (cc == not_equal)
1923 __ cbzw(r0, not_taken);
1924 else {
1925 __ andsw(zr, r0, r0);
1926 __ br(j_not(cc), not_taken);
1927 }
1928
1929 branch(false, false);
1930 __ bind(not_taken);
1931 __ profile_not_taken_branch(r0);
1932 }
1933
1934 void TemplateTable::if_icmp(Condition cc)
1935 {
1936 transition(itos, vtos);
1937 // assume branch is more often taken than not (loops use backward branches)
1938 Label not_taken;
1939 __ pop_i(r1);
1940 __ cmpw(r1, r0, Assembler::LSL);
1941 __ br(j_not(cc), not_taken);
1942 branch(false, false);
1943 __ bind(not_taken);
1944 __ profile_not_taken_branch(r0);
1945 }
1946
1947 void TemplateTable::if_nullcmp(Condition cc)
1948 {
1949 transition(atos, vtos);
1950 // assume branch is more often taken than not (loops use backward branches)
1951 Label not_taken;
1952 if (cc == equal)
1953 __ cbnz(r0, not_taken);
1954 else
1955 __ cbz(r0, not_taken);
1956 branch(false, false);
1957 __ bind(not_taken);
1958 __ profile_not_taken_branch(r0);
1959 }
1960
1961 void TemplateTable::if_acmp(Condition cc)
1962 {
1963 transition(atos, vtos);
1964 // assume branch is more often taken than not (loops use backward branches)
1965 Label not_taken;
1966 __ pop_ptr(r1);
1967 __ cmpoop(r1, r0);
1968 __ br(j_not(cc), not_taken);
1969 branch(false, false);
1970 __ bind(not_taken);
1971 __ profile_not_taken_branch(r0);
1972 }
1973
1974 void TemplateTable::ret() {
1975 transition(vtos, vtos);
1976 locals_index(r1);
1977 __ ldr(r1, aaddress(r1)); // get return bci, compute return bcp
1978 __ profile_ret(r1, r2);
1979 __ ldr(rbcp, Address(rmethod, Method::const_offset()));
1980 __ lea(rbcp, Address(rbcp, r1));
1981 __ add(rbcp, rbcp, in_bytes(ConstMethod::codes_offset()));
1982 __ dispatch_next(vtos, 0, /*generate_poll*/true);
1983 }
1984
1985 void TemplateTable::wide_ret() {
1986 transition(vtos, vtos);
1987 locals_index_wide(r1);
1988 __ ldr(r1, aaddress(r1)); // get return bci, compute return bcp
1989 __ profile_ret(r1, r2);
1990 __ ldr(rbcp, Address(rmethod, Method::const_offset()));
1991 __ lea(rbcp, Address(rbcp, r1));
1992 __ add(rbcp, rbcp, in_bytes(ConstMethod::codes_offset()));
1993 __ dispatch_next(vtos, 0, /*generate_poll*/true);
1994 }
1995
1996
1997 void TemplateTable::tableswitch() {
1998 Label default_case, continue_execution;
1999 transition(itos, vtos);
2000 // align rbcp
2001 __ lea(r1, at_bcp(BytesPerInt));
2002 __ andr(r1, r1, -BytesPerInt);
2003 // load lo & hi
2004 __ ldrw(r2, Address(r1, BytesPerInt));
2005 __ ldrw(r3, Address(r1, 2 * BytesPerInt));
2006 __ rev32(r2, r2);
2007 __ rev32(r3, r3);
2008 // check against lo & hi
2009 __ cmpw(r0, r2);
2010 __ br(Assembler::LT, default_case);
2011 __ cmpw(r0, r3);
2012 __ br(Assembler::GT, default_case);
2013 // lookup dispatch offset
2014 __ subw(r0, r0, r2);
2015 __ lea(r3, Address(r1, r0, Address::uxtw(2)));
2016 __ ldrw(r3, Address(r3, 3 * BytesPerInt));
2017 __ profile_switch_case(r0, r1, r2);
2018 // continue execution
2019 __ bind(continue_execution);
2020 __ rev32(r3, r3);
2021 __ load_unsigned_byte(rscratch1, Address(rbcp, r3, Address::sxtw(0)));
2022 __ add(rbcp, rbcp, r3, ext::sxtw);
2023 __ dispatch_only(vtos, /*generate_poll*/true);
2024 // handle default
2025 __ bind(default_case);
2026 __ profile_switch_default(r0);
2027 __ ldrw(r3, Address(r1, 0));
2028 __ b(continue_execution);
2029 }
2030
2031 void TemplateTable::lookupswitch() {
2032 transition(itos, itos);
2033 __ stop("lookupswitch bytecode should have been rewritten");
2034 }
2035
2036 void TemplateTable::fast_linearswitch() {
2037 transition(itos, vtos);
2038 Label loop_entry, loop, found, continue_execution;
2039 // bswap r0 so we can avoid bswapping the table entries
2040 __ rev32(r0, r0);
2041 // align rbcp
2042 __ lea(r19, at_bcp(BytesPerInt)); // btw: should be able to get rid of
2043 // this instruction (change offsets
2044 // below)
2045 __ andr(r19, r19, -BytesPerInt);
2046 // set counter
2047 __ ldrw(r1, Address(r19, BytesPerInt));
2048 __ rev32(r1, r1);
2049 __ b(loop_entry);
2050 // table search
2051 __ bind(loop);
2052 __ lea(rscratch1, Address(r19, r1, Address::lsl(3)));
2053 __ ldrw(rscratch1, Address(rscratch1, 2 * BytesPerInt));
2054 __ cmpw(r0, rscratch1);
2055 __ br(Assembler::EQ, found);
2056 __ bind(loop_entry);
2057 __ subs(r1, r1, 1);
2058 __ br(Assembler::PL, loop);
2059 // default case
2060 __ profile_switch_default(r0);
2061 __ ldrw(r3, Address(r19, 0));
2062 __ b(continue_execution);
2063 // entry found -> get offset
2064 __ bind(found);
2065 __ lea(rscratch1, Address(r19, r1, Address::lsl(3)));
2066 __ ldrw(r3, Address(rscratch1, 3 * BytesPerInt));
2067 __ profile_switch_case(r1, r0, r19);
2068 // continue execution
2069 __ bind(continue_execution);
2070 __ rev32(r3, r3);
2071 __ add(rbcp, rbcp, r3, ext::sxtw);
2072 __ ldrb(rscratch1, Address(rbcp, 0));
2073 __ dispatch_only(vtos, /*generate_poll*/true);
2074 }
2075
2076 void TemplateTable::fast_binaryswitch() {
2077 transition(itos, vtos);
2078 // Implementation using the following core algorithm:
2079 //
2080 // int binary_search(int key, LookupswitchPair* array, int n) {
2081 // // Binary search according to "Methodik des Programmierens" by
2082 // // Edsger W. Dijkstra and W.H.J. Feijen, Addison Wesley Germany 1985.
2083 // int i = 0;
2084 // int j = n;
2085 // while (i+1 < j) {
2086 // // invariant P: 0 <= i < j <= n and (a[i] <= key < a[j] or Q)
2087 // // with Q: for all i: 0 <= i < n: key < a[i]
2088 // // where a stands for the array and assuming that the (inexisting)
2089 // // element a[n] is infinitely big.
2090 // int h = (i + j) >> 1;
2091 // // i < h < j
2092 // if (key < array[h].fast_match()) {
2093 // j = h;
2094 // } else {
2095 // i = h;
2096 // }
2097 // }
2098 // // R: a[i] <= key < a[i+1] or Q
2099 // // (i.e., if key is within array, i is the correct index)
2100 // return i;
2101 // }
2102
2103 // Register allocation
2104 const Register key = r0; // already set (tosca)
2105 const Register array = r1;
2106 const Register i = r2;
2107 const Register j = r3;
2108 const Register h = rscratch1;
2109 const Register temp = rscratch2;
2110
2111 // Find array start
2112 __ lea(array, at_bcp(3 * BytesPerInt)); // btw: should be able to
2113 // get rid of this
2114 // instruction (change
2115 // offsets below)
2116 __ andr(array, array, -BytesPerInt);
2117
2118 // Initialize i & j
2119 __ mov(i, 0); // i = 0;
2120 __ ldrw(j, Address(array, -BytesPerInt)); // j = length(array);
2121
2122 // Convert j into native byteordering
2123 __ rev32(j, j);
2124
2125 // And start
2126 Label entry;
2127 __ b(entry);
2128
2129 // binary search loop
2130 {
2131 Label loop;
2132 __ bind(loop);
2133 // int h = (i + j) >> 1;
2134 __ addw(h, i, j); // h = i + j;
2135 __ lsrw(h, h, 1); // h = (i + j) >> 1;
2136 // if (key < array[h].fast_match()) {
2137 // j = h;
2138 // } else {
2139 // i = h;
2140 // }
2141 // Convert array[h].match to native byte-ordering before compare
2142 __ ldr(temp, Address(array, h, Address::lsl(3)));
2143 __ rev32(temp, temp);
2144 __ cmpw(key, temp);
2145 // j = h if (key < array[h].fast_match())
2146 __ csel(j, h, j, Assembler::LT);
2147 // i = h if (key >= array[h].fast_match())
2148 __ csel(i, h, i, Assembler::GE);
2149 // while (i+1 < j)
2150 __ bind(entry);
2151 __ addw(h, i, 1); // i+1
2152 __ cmpw(h, j); // i+1 < j
2153 __ br(Assembler::LT, loop);
2154 }
2155
2156 // end of binary search, result index is i (must check again!)
2157 Label default_case;
2158 // Convert array[i].match to native byte-ordering before compare
2159 __ ldr(temp, Address(array, i, Address::lsl(3)));
2160 __ rev32(temp, temp);
2161 __ cmpw(key, temp);
2162 __ br(Assembler::NE, default_case);
2163
2164 // entry found -> j = offset
2165 __ add(j, array, i, ext::uxtx, 3);
2166 __ ldrw(j, Address(j, BytesPerInt));
2167 __ profile_switch_case(i, key, array);
2168 __ rev32(j, j);
2169 __ load_unsigned_byte(rscratch1, Address(rbcp, j, Address::sxtw(0)));
2170 __ lea(rbcp, Address(rbcp, j, Address::sxtw(0)));
2171 __ dispatch_only(vtos, /*generate_poll*/true);
2172
2173 // default case -> j = default offset
2174 __ bind(default_case);
2175 __ profile_switch_default(i);
2176 __ ldrw(j, Address(array, -2 * BytesPerInt));
2177 __ rev32(j, j);
2178 __ load_unsigned_byte(rscratch1, Address(rbcp, j, Address::sxtw(0)));
2179 __ lea(rbcp, Address(rbcp, j, Address::sxtw(0)));
2180 __ dispatch_only(vtos, /*generate_poll*/true);
2181 }
2182
2183
2184 void TemplateTable::_return(TosState state)
2185 {
2186 transition(state, state);
2187 assert(_desc->calls_vm(),
2188 "inconsistent calls_vm information"); // call in remove_activation
2189
2190 if (_desc->bytecode() == Bytecodes::_return_register_finalizer) {
2191 assert(state == vtos, "only valid state");
2192
2193 __ ldr(c_rarg1, aaddress(0));
2194 __ load_klass(r3, c_rarg1);
2195 __ ldrb(r3, Address(r3, Klass::misc_flags_offset()));
2196 Label skip_register_finalizer;
2197 __ tbz(r3, exact_log2(KlassFlags::_misc_has_finalizer), skip_register_finalizer);
2198
2199 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::register_finalizer), c_rarg1);
2200
2201 __ bind(skip_register_finalizer);
2202 }
2203
2204 // Issue a StoreStore barrier after all stores but before return
2205 // from any constructor for any class with a final field. We don't
2206 // know if this is a finalizer, so we always do so.
2207 if (_desc->bytecode() == Bytecodes::_return)
2208 __ membar(MacroAssembler::StoreStore);
2209
2210 if (_desc->bytecode() != Bytecodes::_return_register_finalizer) {
2211 Label no_safepoint;
2212 __ ldr(rscratch1, Address(rthread, JavaThread::polling_word_offset()));
2213 __ tbz(rscratch1, log2i_exact(SafepointMechanism::poll_bit()), no_safepoint);
2214 __ push(state);
2215 __ push_cont_fastpath(rthread);
2216 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint));
2217 __ pop_cont_fastpath(rthread);
2218 __ pop(state);
2219 __ bind(no_safepoint);
2220 }
2221
2222 // Narrow result if state is itos but result type is smaller.
2223 // Need to narrow in the return bytecode rather than in generate_return_entry
2224 // since compiled code callers expect the result to already be narrowed.
2225 if (state == itos) {
2226 __ narrow(r0);
2227 }
2228
2229 __ remove_activation(state);
2230 __ ret(lr);
2231 }
2232
2233 // ----------------------------------------------------------------------------
2234 // Volatile variables demand their effects be made known to all CPU's
2235 // in order. Store buffers on most chips allow reads & writes to
2236 // reorder; the JMM's ReadAfterWrite.java test fails in -Xint mode
2237 // without some kind of memory barrier (i.e., it's not sufficient that
2238 // the interpreter does not reorder volatile references, the hardware
2239 // also must not reorder them).
2240 //
2241 // According to the new Java Memory Model (JMM):
2242 // (1) All volatiles are serialized wrt to each other. ALSO reads &
2243 // writes act as acquire & release, so:
2244 // (2) A read cannot let unrelated NON-volatile memory refs that
2245 // happen after the read float up to before the read. It's OK for
2246 // non-volatile memory refs that happen before the volatile read to
2247 // float down below it.
2248 // (3) Similar a volatile write cannot let unrelated NON-volatile
2249 // memory refs that happen BEFORE the write float down to after the
2250 // write. It's OK for non-volatile memory refs that happen after the
2251 // volatile write to float up before it.
2252 //
2253 // We only put in barriers around volatile refs (they are expensive),
2254 // not _between_ memory refs (that would require us to track the
2255 // flavor of the previous memory refs). Requirements (2) and (3)
2256 // require some barriers before volatile stores and after volatile
2257 // loads. These nearly cover requirement (1) but miss the
2258 // volatile-store-volatile-load case. This final case is placed after
2259 // volatile-stores although it could just as well go before
2260 // volatile-loads.
2261
2262 void TemplateTable::resolve_cache_and_index_for_method(int byte_no,
2263 Register Rcache,
2264 Register index) {
2265 const Register temp = r19;
2266 assert_different_registers(Rcache, index, temp);
2267 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");
2268
2269 Label resolved, clinit_barrier_slow;
2270
2271 Bytecodes::Code code = bytecode();
2272 __ load_method_entry(Rcache, index);
2273 switch(byte_no) {
2274 case f1_byte:
2275 __ lea(temp, Address(Rcache, in_bytes(ResolvedMethodEntry::bytecode1_offset())));
2276 break;
2277 case f2_byte:
2278 __ lea(temp, Address(Rcache, in_bytes(ResolvedMethodEntry::bytecode2_offset())));
2279 break;
2280 }
2281 // Load-acquire the bytecode to match store-release in InterpreterRuntime
2282 __ ldarb(temp, temp);
2283 __ subs(zr, temp, (int) code); // have we resolved this bytecode?
2284 __ br(Assembler::EQ, resolved);
2285
2286 // resolve first time through
2287 // Class initialization barrier slow path lands here as well.
2288 __ bind(clinit_barrier_slow);
2289 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_from_cache);
2290 __ mov(temp, (int) code);
2291 __ call_VM(noreg, entry, temp);
2292
2293 // Update registers with resolved info
2294 __ load_method_entry(Rcache, index);
2295 // n.b. unlike x86 Rcache is now rcpool plus the indexed offset
2296 // so all clients ofthis method must be modified accordingly
2297 __ bind(resolved);
2298
2299 // Class initialization barrier for static methods
2300 if (VM_Version::supports_fast_class_init_checks() && bytecode() == Bytecodes::_invokestatic) {
2301 __ ldr(temp, Address(Rcache, in_bytes(ResolvedMethodEntry::method_offset())));
2302 __ load_method_holder(temp, temp);
2303 __ clinit_barrier(temp, rscratch1, nullptr, &clinit_barrier_slow);
2304 }
2305 }
2306
2307 void TemplateTable::resolve_cache_and_index_for_field(int byte_no,
2308 Register Rcache,
2309 Register index) {
2310 const Register temp = r19;
2311 assert_different_registers(Rcache, index, temp);
2312
2313 Label resolved;
2314
2315 Bytecodes::Code code = bytecode();
2316 switch (code) {
2317 case Bytecodes::_nofast_getfield: code = Bytecodes::_getfield; break;
2318 case Bytecodes::_nofast_putfield: code = Bytecodes::_putfield; break;
2319 default: break;
2320 }
2321
2322 assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");
2323 __ load_field_entry(Rcache, index);
2324 if (byte_no == f1_byte) {
2325 __ lea(temp, Address(Rcache, in_bytes(ResolvedFieldEntry::get_code_offset())));
2326 } else {
2327 __ lea(temp, Address(Rcache, in_bytes(ResolvedFieldEntry::put_code_offset())));
2328 }
2329 // Load-acquire the bytecode to match store-release in ResolvedFieldEntry::fill_in()
2330 __ ldarb(temp, temp);
2331 __ subs(zr, temp, (int) code); // have we resolved this bytecode?
2332 __ br(Assembler::EQ, resolved);
2333
2334 // resolve first time through
2335 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_from_cache);
2336 __ mov(temp, (int) code);
2337 __ call_VM(noreg, entry, temp);
2338
2339 // Update registers with resolved info
2340 __ load_field_entry(Rcache, index);
2341 __ bind(resolved);
2342 }
2343
2344 void TemplateTable::load_resolved_field_entry(Register obj,
2345 Register cache,
2346 Register tos_state,
2347 Register offset,
2348 Register flags,
2349 bool is_static = false) {
2350 assert_different_registers(cache, tos_state, flags, offset);
2351
2352 // Field offset
2353 __ load_sized_value(offset, Address(cache, in_bytes(ResolvedFieldEntry::field_offset_offset())), sizeof(int), true /*is_signed*/);
2354
2355 // Flags
2356 __ load_unsigned_byte(flags, Address(cache, in_bytes(ResolvedFieldEntry::flags_offset())));
2357
2358 // TOS state
2359 if (tos_state != noreg) {
2360 __ load_unsigned_byte(tos_state, Address(cache, in_bytes(ResolvedFieldEntry::type_offset())));
2361 }
2362
2363 // Klass overwrite register
2364 if (is_static) {
2365 __ ldr(obj, Address(cache, ResolvedFieldEntry::field_holder_offset()));
2366 const int mirror_offset = in_bytes(Klass::java_mirror_offset());
2367 __ ldr(obj, Address(obj, mirror_offset));
2368 __ resolve_oop_handle(obj, r5, rscratch2);
2369 }
2370 }
2371
2372 void TemplateTable::load_resolved_method_entry_special_or_static(Register cache,
2373 Register method,
2374 Register flags) {
2375
2376 // setup registers
2377 const Register index = flags;
2378 assert_different_registers(method, cache, flags);
2379
2380 // determine constant pool cache field offsets
2381 resolve_cache_and_index_for_method(f1_byte, cache, index);
2382 __ load_unsigned_byte(flags, Address(cache, in_bytes(ResolvedMethodEntry::flags_offset())));
2383 __ ldr(method, Address(cache, in_bytes(ResolvedMethodEntry::method_offset())));
2384 }
2385
2386 void TemplateTable::load_resolved_method_entry_handle(Register cache,
2387 Register method,
2388 Register ref_index,
2389 Register flags) {
2390 // setup registers
2391 const Register index = ref_index;
2392 assert_different_registers(method, flags);
2393 assert_different_registers(method, cache, index);
2394
2395 // determine constant pool cache field offsets
2396 resolve_cache_and_index_for_method(f1_byte, cache, index);
2397 __ load_unsigned_byte(flags, Address(cache, in_bytes(ResolvedMethodEntry::flags_offset())));
2398
2399 // maybe push appendix to arguments (just before return address)
2400 Label L_no_push;
2401 __ tbz(flags, ResolvedMethodEntry::has_appendix_shift, L_no_push);
2402 // invokehandle uses an index into the resolved references array
2403 __ load_unsigned_short(ref_index, Address(cache, in_bytes(ResolvedMethodEntry::resolved_references_index_offset())));
2404 // Push the appendix as a trailing parameter.
2405 // This must be done before we get the receiver,
2406 // since the parameter_size includes it.
2407 Register appendix = method;
2408 __ load_resolved_reference_at_index(appendix, ref_index);
2409 __ push(appendix); // push appendix (MethodType, CallSite, etc.)
2410 __ bind(L_no_push);
2411
2412 __ ldr(method, Address(cache, in_bytes(ResolvedMethodEntry::method_offset())));
2413 }
2414
2415 void TemplateTable::load_resolved_method_entry_interface(Register cache,
2416 Register klass,
2417 Register method_or_table_index,
2418 Register flags) {
2419 // setup registers
2420 const Register index = method_or_table_index;
2421 assert_different_registers(method_or_table_index, cache, flags);
2422
2423 // determine constant pool cache field offsets
2424 resolve_cache_and_index_for_method(f1_byte, cache, index);
2425 __ load_unsigned_byte(flags, Address(cache, in_bytes(ResolvedMethodEntry::flags_offset())));
2426
2427 // Invokeinterface can behave in different ways:
2428 // If calling a method from java.lang.Object, the forced virtual flag is true so the invocation will
2429 // behave like an invokevirtual call. The state of the virtual final flag will determine whether a method or
2430 // vtable index is placed in the register.
2431 // Otherwise, the registers will be populated with the klass and method.
2432
2433 Label NotVirtual; Label NotVFinal; Label Done;
2434 __ tbz(flags, ResolvedMethodEntry::is_forced_virtual_shift, NotVirtual);
2435 __ tbz(flags, ResolvedMethodEntry::is_vfinal_shift, NotVFinal);
2436 __ ldr(method_or_table_index, Address(cache, in_bytes(ResolvedMethodEntry::method_offset())));
2437 __ b(Done);
2438
2439 __ bind(NotVFinal);
2440 __ load_unsigned_short(method_or_table_index, Address(cache, in_bytes(ResolvedMethodEntry::table_index_offset())));
2441 __ b(Done);
2442
2443 __ bind(NotVirtual);
2444 __ ldr(method_or_table_index, Address(cache, in_bytes(ResolvedMethodEntry::method_offset())));
2445 __ ldr(klass, Address(cache, in_bytes(ResolvedMethodEntry::klass_offset())));
2446 __ bind(Done);
2447 }
2448
2449 void TemplateTable::load_resolved_method_entry_virtual(Register cache,
2450 Register method_or_table_index,
2451 Register flags) {
2452 // setup registers
2453 const Register index = flags;
2454 assert_different_registers(method_or_table_index, cache, flags);
2455
2456 // determine constant pool cache field offsets
2457 resolve_cache_and_index_for_method(f2_byte, cache, index);
2458 __ load_unsigned_byte(flags, Address(cache, in_bytes(ResolvedMethodEntry::flags_offset())));
2459
2460 // method_or_table_index can either be an itable index or a method depending on the virtual final flag
2461 Label NotVFinal; Label Done;
2462 __ tbz(flags, ResolvedMethodEntry::is_vfinal_shift, NotVFinal);
2463 __ ldr(method_or_table_index, Address(cache, in_bytes(ResolvedMethodEntry::method_offset())));
2464 __ b(Done);
2465
2466 __ bind(NotVFinal);
2467 __ load_unsigned_short(method_or_table_index, Address(cache, in_bytes(ResolvedMethodEntry::table_index_offset())));
2468 __ bind(Done);
2469 }
2470
2471 // The rmethod register is input and overwritten to be the adapter method for the
2472 // indy call. Link Register (lr) is set to the return address for the adapter and
2473 // an appendix may be pushed to the stack. Registers r0-r3 are clobbered
2474 void TemplateTable::load_invokedynamic_entry(Register method) {
2475 // setup registers
2476 const Register appendix = r0;
2477 const Register cache = r2;
2478 const Register index = r3;
2479 assert_different_registers(method, appendix, cache, index, rcpool);
2480
2481 __ save_bcp();
2482
2483 Label resolved;
2484
2485 __ load_resolved_indy_entry(cache, index);
2486 // Load-acquire the adapter method to match store-release in ResolvedIndyEntry::fill_in()
2487 __ lea(method, Address(cache, in_bytes(ResolvedIndyEntry::method_offset())));
2488 __ ldar(method, method);
2489
2490 // Compare the method to zero
2491 __ cbnz(method, resolved);
2492
2493 Bytecodes::Code code = bytecode();
2494
2495 // Call to the interpreter runtime to resolve invokedynamic
2496 address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_from_cache);
2497 __ mov(method, code); // this is essentially Bytecodes::_invokedynamic
2498 __ call_VM(noreg, entry, method);
2499 // Update registers with resolved info
2500 __ load_resolved_indy_entry(cache, index);
2501 // Load-acquire the adapter method to match store-release in ResolvedIndyEntry::fill_in()
2502 __ lea(method, Address(cache, in_bytes(ResolvedIndyEntry::method_offset())));
2503 __ ldar(method, method);
2504
2505 #ifdef ASSERT
2506 __ cbnz(method, resolved);
2507 __ stop("Should be resolved by now");
2508 #endif // ASSERT
2509 __ bind(resolved);
2510
2511 Label L_no_push;
2512 // Check if there is an appendix
2513 __ load_unsigned_byte(index, Address(cache, in_bytes(ResolvedIndyEntry::flags_offset())));
2514 __ tbz(index, ResolvedIndyEntry::has_appendix_shift, L_no_push);
2515
2516 // Get appendix
2517 __ load_unsigned_short(index, Address(cache, in_bytes(ResolvedIndyEntry::resolved_references_index_offset())));
2518 // Push the appendix as a trailing parameter
2519 // since the parameter_size includes it.
2520 __ push(method);
2521 __ mov(method, index);
2522 __ load_resolved_reference_at_index(appendix, method);
2523 __ verify_oop(appendix);
2524 __ pop(method);
2525 __ push(appendix); // push appendix (MethodType, CallSite, etc.)
2526 __ bind(L_no_push);
2527
2528 // compute return type
2529 __ load_unsigned_byte(index, Address(cache, in_bytes(ResolvedIndyEntry::result_type_offset())));
2530 // load return address
2531 // Return address is loaded into link register(lr) and not pushed to the stack
2532 // like x86
2533 {
2534 const address table_addr = (address) Interpreter::invoke_return_entry_table_for(code);
2535 __ mov(rscratch1, table_addr);
2536 __ ldr(lr, Address(rscratch1, index, Address::lsl(3)));
2537 }
2538 }
2539
2540 // The registers cache and index expected to be set before call.
2541 // Correct values of the cache and index registers are preserved.
2542 void TemplateTable::jvmti_post_field_access(Register cache, Register index,
2543 bool is_static, bool has_tos) {
2544 // do the JVMTI work here to avoid disturbing the register state below
2545 // We use c_rarg registers here because we want to use the register used in
2546 // the call to the VM
2547 if (JvmtiExport::can_post_field_access()) {
2548 // Check to see if a field access watch has been set before we
2549 // take the time to call into the VM.
2550 Label L1;
2551 assert_different_registers(cache, index, r0);
2552 __ lea(rscratch1, ExternalAddress((address) JvmtiExport::get_field_access_count_addr()));
2553 __ ldrw(r0, Address(rscratch1));
2554 __ cbzw(r0, L1);
2555
2556 __ load_field_entry(c_rarg2, index);
2557
2558 if (is_static) {
2559 __ mov(c_rarg1, zr); // null object reference
2560 } else {
2561 __ ldr(c_rarg1, at_tos()); // get object pointer without popping it
2562 __ verify_oop(c_rarg1);
2563 }
2564 // c_rarg1: object pointer or null
2565 // c_rarg2: cache entry pointer
2566 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
2567 InterpreterRuntime::post_field_access),
2568 c_rarg1, c_rarg2);
2569 __ load_field_entry(cache, index);
2570 __ bind(L1);
2571 }
2572 }
2573
2574 void TemplateTable::pop_and_check_object(Register r)
2575 {
2576 __ pop_ptr(r);
2577 __ null_check(r); // for field access must check obj.
2578 __ verify_oop(r);
2579 }
2580
2581 void TemplateTable::getfield_or_static(int byte_no, bool is_static, RewriteControl rc)
2582 {
2583 const Register cache = r4;
2584 const Register obj = r4;
2585 const Register index = r3;
2586 const Register tos_state = r3;
2587 const Register off = r19;
2588 const Register flags = r6;
2589 const Register bc = r4; // uses same reg as obj, so don't mix them
2590
2591 resolve_cache_and_index_for_field(byte_no, cache, index);
2592 jvmti_post_field_access(cache, index, is_static, false);
2593 load_resolved_field_entry(obj, cache, tos_state, off, flags, is_static);
2594
2595 if (!is_static) {
2596 // obj is on the stack
2597 pop_and_check_object(obj);
2598 }
2599
2600 // 8179954: We need to make sure that the code generated for
2601 // volatile accesses forms a sequentially-consistent set of
2602 // operations when combined with STLR and LDAR. Without a leading
2603 // membar it's possible for a simple Dekker test to fail if loads
2604 // use LDR;DMB but stores use STLR. This can happen if C2 compiles
2605 // the stores in one method and we interpret the loads in another.
2606 if (!CompilerConfig::is_c1_or_interpreter_only_no_jvmci()){
2607 Label notVolatile;
2608 __ tbz(flags, ResolvedFieldEntry::is_volatile_shift, notVolatile);
2609 __ membar(MacroAssembler::AnyAny);
2610 __ bind(notVolatile);
2611 }
2612
2613 const Address field(obj, off);
2614
2615 Label Done, notByte, notBool, notInt, notShort, notChar,
2616 notLong, notFloat, notObj, notDouble;
2617
2618 assert(btos == 0, "change code, btos != 0");
2619 __ cbnz(tos_state, notByte);
2620
2621 // Don't rewrite getstatic, only getfield
2622 if (is_static) rc = may_not_rewrite;
2623
2624 // btos
2625 __ access_load_at(T_BYTE, IN_HEAP, r0, field, noreg, noreg);
2626 __ push(btos);
2627 // Rewrite bytecode to be faster
2628 if (rc == may_rewrite) {
2629 patch_bytecode(Bytecodes::_fast_bgetfield, bc, r1);
2630 }
2631 __ b(Done);
2632
2633 __ bind(notByte);
2634 __ cmp(tos_state, (u1)ztos);
2635 __ br(Assembler::NE, notBool);
2636
2637 // ztos (same code as btos)
2638 __ access_load_at(T_BOOLEAN, IN_HEAP, r0, field, noreg, noreg);
2639 __ push(ztos);
2640 // Rewrite bytecode to be faster
2641 if (rc == may_rewrite) {
2642 // use btos rewriting, no truncating to t/f bit is needed for getfield.
2643 patch_bytecode(Bytecodes::_fast_bgetfield, bc, r1);
2644 }
2645 __ b(Done);
2646
2647 __ bind(notBool);
2648 __ cmp(tos_state, (u1)atos);
2649 __ br(Assembler::NE, notObj);
2650 // atos
2651 do_oop_load(_masm, field, r0, IN_HEAP);
2652 __ push(atos);
2653 if (rc == may_rewrite) {
2654 patch_bytecode(Bytecodes::_fast_agetfield, bc, r1);
2655 }
2656 __ b(Done);
2657
2658 __ bind(notObj);
2659 __ cmp(tos_state, (u1)itos);
2660 __ br(Assembler::NE, notInt);
2661 // itos
2662 __ access_load_at(T_INT, IN_HEAP, r0, field, noreg, noreg);
2663 __ push(itos);
2664 // Rewrite bytecode to be faster
2665 if (rc == may_rewrite) {
2666 patch_bytecode(Bytecodes::_fast_igetfield, bc, r1);
2667 }
2668 __ b(Done);
2669
2670 __ bind(notInt);
2671 __ cmp(tos_state, (u1)ctos);
2672 __ br(Assembler::NE, notChar);
2673 // ctos
2674 __ access_load_at(T_CHAR, IN_HEAP, r0, field, noreg, noreg);
2675 __ push(ctos);
2676 // Rewrite bytecode to be faster
2677 if (rc == may_rewrite) {
2678 patch_bytecode(Bytecodes::_fast_cgetfield, bc, r1);
2679 }
2680 __ b(Done);
2681
2682 __ bind(notChar);
2683 __ cmp(tos_state, (u1)stos);
2684 __ br(Assembler::NE, notShort);
2685 // stos
2686 __ access_load_at(T_SHORT, IN_HEAP, r0, field, noreg, noreg);
2687 __ push(stos);
2688 // Rewrite bytecode to be faster
2689 if (rc == may_rewrite) {
2690 patch_bytecode(Bytecodes::_fast_sgetfield, bc, r1);
2691 }
2692 __ b(Done);
2693
2694 __ bind(notShort);
2695 __ cmp(tos_state, (u1)ltos);
2696 __ br(Assembler::NE, notLong);
2697 // ltos
2698 __ access_load_at(T_LONG, IN_HEAP, r0, field, noreg, noreg);
2699 __ push(ltos);
2700 // Rewrite bytecode to be faster
2701 if (rc == may_rewrite) {
2702 patch_bytecode(Bytecodes::_fast_lgetfield, bc, r1);
2703 }
2704 __ b(Done);
2705
2706 __ bind(notLong);
2707 __ cmp(tos_state, (u1)ftos);
2708 __ br(Assembler::NE, notFloat);
2709 // ftos
2710 __ access_load_at(T_FLOAT, IN_HEAP, noreg /* ftos */, field, noreg, noreg);
2711 __ push(ftos);
2712 // Rewrite bytecode to be faster
2713 if (rc == may_rewrite) {
2714 patch_bytecode(Bytecodes::_fast_fgetfield, bc, r1);
2715 }
2716 __ b(Done);
2717
2718 __ bind(notFloat);
2719 #ifdef ASSERT
2720 __ cmp(tos_state, (u1)dtos);
2721 __ br(Assembler::NE, notDouble);
2722 #endif
2723 // dtos
2724 __ access_load_at(T_DOUBLE, IN_HEAP, noreg /* ftos */, field, noreg, noreg);
2725 __ push(dtos);
2726 // Rewrite bytecode to be faster
2727 if (rc == may_rewrite) {
2728 patch_bytecode(Bytecodes::_fast_dgetfield, bc, r1);
2729 }
2730 #ifdef ASSERT
2731 __ b(Done);
2732
2733 __ bind(notDouble);
2734 __ stop("Bad state");
2735 #endif
2736
2737 __ bind(Done);
2738
2739 Label notVolatile;
2740 __ tbz(flags, ResolvedFieldEntry::is_volatile_shift, notVolatile);
2741 __ membar(MacroAssembler::LoadLoad | MacroAssembler::LoadStore);
2742 __ bind(notVolatile);
2743 }
2744
2745
2746 void TemplateTable::getfield(int byte_no)
2747 {
2748 getfield_or_static(byte_no, false);
2749 }
2750
2751 void TemplateTable::nofast_getfield(int byte_no) {
2752 getfield_or_static(byte_no, false, may_not_rewrite);
2753 }
2754
2755 void TemplateTable::getstatic(int byte_no)
2756 {
2757 getfield_or_static(byte_no, true);
2758 }
2759
2760 // The registers cache and index expected to be set before call.
2761 // The function may destroy various registers, just not the cache and index registers.
2762 void TemplateTable::jvmti_post_field_mod(Register cache, Register index, bool is_static) {
2763 transition(vtos, vtos);
2764
2765 if (JvmtiExport::can_post_field_modification()) {
2766 // Check to see if a field modification watch has been set before
2767 // we take the time to call into the VM.
2768 Label L1;
2769 assert_different_registers(cache, index, r0);
2770 __ lea(rscratch1, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr()));
2771 __ ldrw(r0, Address(rscratch1));
2772 __ cbz(r0, L1);
2773
2774 __ mov(c_rarg2, cache);
2775
2776 if (is_static) {
2777 // Life is simple. Null out the object pointer.
2778 __ mov(c_rarg1, zr);
2779 } else {
2780 // Life is harder. The stack holds the value on top, followed by
2781 // the object. We don't know the size of the value, though; it
2782 // could be one or two words depending on its type. As a result,
2783 // we must find the type to determine where the object is.
2784 __ load_unsigned_byte(c_rarg3, Address(c_rarg2, in_bytes(ResolvedFieldEntry::type_offset())));
2785 Label nope2, done, ok;
2786 __ ldr(c_rarg1, at_tos_p1()); // initially assume a one word jvalue
2787 __ cmpw(c_rarg3, ltos);
2788 __ br(Assembler::EQ, ok);
2789 __ cmpw(c_rarg3, dtos);
2790 __ br(Assembler::NE, nope2);
2791 __ bind(ok);
2792 __ ldr(c_rarg1, at_tos_p2()); // ltos (two word jvalue)
2793 __ bind(nope2);
2794 }
2795 // object (tos)
2796 __ mov(c_rarg3, esp);
2797 // c_rarg1: object pointer set up above (null if static)
2798 // c_rarg2: cache entry pointer
2799 // c_rarg3: jvalue object on the stack
2800 __ call_VM(noreg,
2801 CAST_FROM_FN_PTR(address,
2802 InterpreterRuntime::post_field_modification),
2803 c_rarg1, c_rarg2, c_rarg3);
2804 __ load_field_entry(cache, index);
2805 __ bind(L1);
2806 }
2807 }
2808
2809 void TemplateTable::putfield_or_static(int byte_no, bool is_static, RewriteControl rc) {
2810 transition(vtos, vtos);
2811
2812 const Register cache = r2;
2813 const Register index = r3;
2814 const Register tos_state = r3;
2815 const Register obj = r2;
2816 const Register off = r19;
2817 const Register flags = r0;
2818 const Register bc = r4;
2819
2820 resolve_cache_and_index_for_field(byte_no, cache, index);
2821 jvmti_post_field_mod(cache, index, is_static);
2822 load_resolved_field_entry(obj, cache, tos_state, off, flags, is_static);
2823
2824 Label Done;
2825 __ mov(r5, flags);
2826
2827 {
2828 Label notVolatile;
2829 __ tbz(r5, ResolvedFieldEntry::is_volatile_shift, notVolatile);
2830 __ membar(MacroAssembler::StoreStore | MacroAssembler::LoadStore);
2831 __ bind(notVolatile);
2832 }
2833
2834 // field address
2835 const Address field(obj, off);
2836
2837 Label notByte, notBool, notInt, notShort, notChar,
2838 notLong, notFloat, notObj, notDouble;
2839
2840 assert(btos == 0, "change code, btos != 0");
2841 __ cbnz(tos_state, notByte);
2842
2843 // Don't rewrite putstatic, only putfield
2844 if (is_static) rc = may_not_rewrite;
2845
2846 // btos
2847 {
2848 __ pop(btos);
2849 if (!is_static) pop_and_check_object(obj);
2850 __ access_store_at(T_BYTE, IN_HEAP, field, r0, noreg, noreg, noreg);
2851 if (rc == may_rewrite) {
2852 patch_bytecode(Bytecodes::_fast_bputfield, bc, r1, true, byte_no);
2853 }
2854 __ b(Done);
2855 }
2856
2857 __ bind(notByte);
2858 __ cmp(tos_state, (u1)ztos);
2859 __ br(Assembler::NE, notBool);
2860
2861 // ztos
2862 {
2863 __ pop(ztos);
2864 if (!is_static) pop_and_check_object(obj);
2865 __ access_store_at(T_BOOLEAN, IN_HEAP, field, r0, noreg, noreg, noreg);
2866 if (rc == may_rewrite) {
2867 patch_bytecode(Bytecodes::_fast_zputfield, bc, r1, true, byte_no);
2868 }
2869 __ b(Done);
2870 }
2871
2872 __ bind(notBool);
2873 __ cmp(tos_state, (u1)atos);
2874 __ br(Assembler::NE, notObj);
2875
2876 // atos
2877 {
2878 __ pop(atos);
2879 if (!is_static) pop_and_check_object(obj);
2880 // Store into the field
2881 do_oop_store(_masm, field, r0, IN_HEAP);
2882 if (rc == may_rewrite) {
2883 patch_bytecode(Bytecodes::_fast_aputfield, bc, r1, true, byte_no);
2884 }
2885 __ b(Done);
2886 }
2887
2888 __ bind(notObj);
2889 __ cmp(tos_state, (u1)itos);
2890 __ br(Assembler::NE, notInt);
2891
2892 // itos
2893 {
2894 __ pop(itos);
2895 if (!is_static) pop_and_check_object(obj);
2896 __ access_store_at(T_INT, IN_HEAP, field, r0, noreg, noreg, noreg);
2897 if (rc == may_rewrite) {
2898 patch_bytecode(Bytecodes::_fast_iputfield, bc, r1, true, byte_no);
2899 }
2900 __ b(Done);
2901 }
2902
2903 __ bind(notInt);
2904 __ cmp(tos_state, (u1)ctos);
2905 __ br(Assembler::NE, notChar);
2906
2907 // ctos
2908 {
2909 __ pop(ctos);
2910 if (!is_static) pop_and_check_object(obj);
2911 __ access_store_at(T_CHAR, IN_HEAP, field, r0, noreg, noreg, noreg);
2912 if (rc == may_rewrite) {
2913 patch_bytecode(Bytecodes::_fast_cputfield, bc, r1, true, byte_no);
2914 }
2915 __ b(Done);
2916 }
2917
2918 __ bind(notChar);
2919 __ cmp(tos_state, (u1)stos);
2920 __ br(Assembler::NE, notShort);
2921
2922 // stos
2923 {
2924 __ pop(stos);
2925 if (!is_static) pop_and_check_object(obj);
2926 __ access_store_at(T_SHORT, IN_HEAP, field, r0, noreg, noreg, noreg);
2927 if (rc == may_rewrite) {
2928 patch_bytecode(Bytecodes::_fast_sputfield, bc, r1, true, byte_no);
2929 }
2930 __ b(Done);
2931 }
2932
2933 __ bind(notShort);
2934 __ cmp(tos_state, (u1)ltos);
2935 __ br(Assembler::NE, notLong);
2936
2937 // ltos
2938 {
2939 __ pop(ltos);
2940 if (!is_static) pop_and_check_object(obj);
2941 __ access_store_at(T_LONG, IN_HEAP, field, r0, noreg, noreg, noreg);
2942 if (rc == may_rewrite) {
2943 patch_bytecode(Bytecodes::_fast_lputfield, bc, r1, true, byte_no);
2944 }
2945 __ b(Done);
2946 }
2947
2948 __ bind(notLong);
2949 __ cmp(tos_state, (u1)ftos);
2950 __ br(Assembler::NE, notFloat);
2951
2952 // ftos
2953 {
2954 __ pop(ftos);
2955 if (!is_static) pop_and_check_object(obj);
2956 __ access_store_at(T_FLOAT, IN_HEAP, field, noreg /* ftos */, noreg, noreg, noreg);
2957 if (rc == may_rewrite) {
2958 patch_bytecode(Bytecodes::_fast_fputfield, bc, r1, true, byte_no);
2959 }
2960 __ b(Done);
2961 }
2962
2963 __ bind(notFloat);
2964 #ifdef ASSERT
2965 __ cmp(tos_state, (u1)dtos);
2966 __ br(Assembler::NE, notDouble);
2967 #endif
2968
2969 // dtos
2970 {
2971 __ pop(dtos);
2972 if (!is_static) pop_and_check_object(obj);
2973 __ access_store_at(T_DOUBLE, IN_HEAP, field, noreg /* dtos */, noreg, noreg, noreg);
2974 if (rc == may_rewrite) {
2975 patch_bytecode(Bytecodes::_fast_dputfield, bc, r1, true, byte_no);
2976 }
2977 }
2978
2979 #ifdef ASSERT
2980 __ b(Done);
2981
2982 __ bind(notDouble);
2983 __ stop("Bad state");
2984 #endif
2985
2986 __ bind(Done);
2987
2988 {
2989 Label notVolatile;
2990 __ tbz(r5, ResolvedFieldEntry::is_volatile_shift, notVolatile);
2991 __ membar(MacroAssembler::StoreLoad | MacroAssembler::StoreStore);
2992 __ bind(notVolatile);
2993 }
2994 }
2995
2996 void TemplateTable::putfield(int byte_no)
2997 {
2998 putfield_or_static(byte_no, false);
2999 }
3000
3001 void TemplateTable::nofast_putfield(int byte_no) {
3002 putfield_or_static(byte_no, false, may_not_rewrite);
3003 }
3004
3005 void TemplateTable::putstatic(int byte_no) {
3006 putfield_or_static(byte_no, true);
3007 }
3008
3009 void TemplateTable::jvmti_post_fast_field_mod() {
3010 if (JvmtiExport::can_post_field_modification()) {
3011 // Check to see if a field modification watch has been set before
3012 // we take the time to call into the VM.
3013 Label L2;
3014 __ lea(rscratch1, ExternalAddress((address)JvmtiExport::get_field_modification_count_addr()));
3015 __ ldrw(c_rarg3, Address(rscratch1));
3016 __ cbzw(c_rarg3, L2);
3017 __ pop_ptr(r19); // copy the object pointer from tos
3018 __ verify_oop(r19);
3019 __ push_ptr(r19); // put the object pointer back on tos
3020 // Save tos values before call_VM() clobbers them. Since we have
3021 // to do it for every data type, we use the saved values as the
3022 // jvalue object.
3023 switch (bytecode()) { // load values into the jvalue object
3024 case Bytecodes::_fast_aputfield: __ push_ptr(r0); break;
3025 case Bytecodes::_fast_bputfield: // fall through
3026 case Bytecodes::_fast_zputfield: // fall through
3027 case Bytecodes::_fast_sputfield: // fall through
3028 case Bytecodes::_fast_cputfield: // fall through
3029 case Bytecodes::_fast_iputfield: __ push_i(r0); break;
3030 case Bytecodes::_fast_dputfield: __ push_d(); break;
3031 case Bytecodes::_fast_fputfield: __ push_f(); break;
3032 case Bytecodes::_fast_lputfield: __ push_l(r0); break;
3033
3034 default:
3035 ShouldNotReachHere();
3036 }
3037 __ mov(c_rarg3, esp); // points to jvalue on the stack
3038 // access constant pool cache entry
3039 __ load_field_entry(c_rarg2, r0);
3040 __ verify_oop(r19);
3041 // r19: object pointer copied above
3042 // c_rarg2: cache entry pointer
3043 // c_rarg3: jvalue object on the stack
3044 __ call_VM(noreg,
3045 CAST_FROM_FN_PTR(address,
3046 InterpreterRuntime::post_field_modification),
3047 r19, c_rarg2, c_rarg3);
3048
3049 switch (bytecode()) { // restore tos values
3050 case Bytecodes::_fast_aputfield: __ pop_ptr(r0); break;
3051 case Bytecodes::_fast_bputfield: // fall through
3052 case Bytecodes::_fast_zputfield: // fall through
3053 case Bytecodes::_fast_sputfield: // fall through
3054 case Bytecodes::_fast_cputfield: // fall through
3055 case Bytecodes::_fast_iputfield: __ pop_i(r0); break;
3056 case Bytecodes::_fast_dputfield: __ pop_d(); break;
3057 case Bytecodes::_fast_fputfield: __ pop_f(); break;
3058 case Bytecodes::_fast_lputfield: __ pop_l(r0); break;
3059 default: break;
3060 }
3061 __ bind(L2);
3062 }
3063 }
3064
3065 void TemplateTable::fast_storefield(TosState state)
3066 {
3067 transition(state, vtos);
3068
3069 ByteSize base = ConstantPoolCache::base_offset();
3070
3071 jvmti_post_fast_field_mod();
3072
3073 // access constant pool cache
3074 __ load_field_entry(r2, r1);
3075
3076 // R1: field offset, R2: field holder, R3: flags
3077 load_resolved_field_entry(r2, r2, noreg, r1, r3);
3078
3079 {
3080 Label notVolatile;
3081 __ tbz(r3, ResolvedFieldEntry::is_volatile_shift, notVolatile);
3082 __ membar(MacroAssembler::StoreStore | MacroAssembler::LoadStore);
3083 __ bind(notVolatile);
3084 }
3085
3086 Label notVolatile;
3087
3088 // Get object from stack
3089 pop_and_check_object(r2);
3090
3091 // field address
3092 const Address field(r2, r1);
3093
3094 // access field
3095 switch (bytecode()) {
3096 case Bytecodes::_fast_aputfield:
3097 do_oop_store(_masm, field, r0, IN_HEAP);
3098 break;
3099 case Bytecodes::_fast_lputfield:
3100 __ access_store_at(T_LONG, IN_HEAP, field, r0, noreg, noreg, noreg);
3101 break;
3102 case Bytecodes::_fast_iputfield:
3103 __ access_store_at(T_INT, IN_HEAP, field, r0, noreg, noreg, noreg);
3104 break;
3105 case Bytecodes::_fast_zputfield:
3106 __ access_store_at(T_BOOLEAN, IN_HEAP, field, r0, noreg, noreg, noreg);
3107 break;
3108 case Bytecodes::_fast_bputfield:
3109 __ access_store_at(T_BYTE, IN_HEAP, field, r0, noreg, noreg, noreg);
3110 break;
3111 case Bytecodes::_fast_sputfield:
3112 __ access_store_at(T_SHORT, IN_HEAP, field, r0, noreg, noreg, noreg);
3113 break;
3114 case Bytecodes::_fast_cputfield:
3115 __ access_store_at(T_CHAR, IN_HEAP, field, r0, noreg, noreg, noreg);
3116 break;
3117 case Bytecodes::_fast_fputfield:
3118 __ access_store_at(T_FLOAT, IN_HEAP, field, noreg /* ftos */, noreg, noreg, noreg);
3119 break;
3120 case Bytecodes::_fast_dputfield:
3121 __ access_store_at(T_DOUBLE, IN_HEAP, field, noreg /* dtos */, noreg, noreg, noreg);
3122 break;
3123 default:
3124 ShouldNotReachHere();
3125 }
3126
3127 {
3128 Label notVolatile;
3129 __ tbz(r3, ResolvedFieldEntry::is_volatile_shift, notVolatile);
3130 __ membar(MacroAssembler::StoreLoad | MacroAssembler::StoreStore);
3131 __ bind(notVolatile);
3132 }
3133 }
3134
3135
3136 void TemplateTable::fast_accessfield(TosState state)
3137 {
3138 transition(atos, state);
3139 // Do the JVMTI work here to avoid disturbing the register state below
3140 if (JvmtiExport::can_post_field_access()) {
3141 // Check to see if a field access watch has been set before we
3142 // take the time to call into the VM.
3143 Label L1;
3144 __ lea(rscratch1, ExternalAddress((address) JvmtiExport::get_field_access_count_addr()));
3145 __ ldrw(r2, Address(rscratch1));
3146 __ cbzw(r2, L1);
3147 // access constant pool cache entry
3148 __ load_field_entry(c_rarg2, rscratch2);
3149 __ verify_oop(r0);
3150 __ push_ptr(r0); // save object pointer before call_VM() clobbers it
3151 __ mov(c_rarg1, r0);
3152 // c_rarg1: object pointer copied above
3153 // c_rarg2: cache entry pointer
3154 __ call_VM(noreg,
3155 CAST_FROM_FN_PTR(address,
3156 InterpreterRuntime::post_field_access),
3157 c_rarg1, c_rarg2);
3158 __ pop_ptr(r0); // restore object pointer
3159 __ bind(L1);
3160 }
3161
3162 // access constant pool cache
3163 __ load_field_entry(r2, r1);
3164
3165 __ load_sized_value(r1, Address(r2, in_bytes(ResolvedFieldEntry::field_offset_offset())), sizeof(int), true /*is_signed*/);
3166 __ load_unsigned_byte(r3, Address(r2, in_bytes(ResolvedFieldEntry::flags_offset())));
3167
3168 // r0: object
3169 __ verify_oop(r0);
3170 __ null_check(r0);
3171 const Address field(r0, r1);
3172
3173 // 8179954: We need to make sure that the code generated for
3174 // volatile accesses forms a sequentially-consistent set of
3175 // operations when combined with STLR and LDAR. Without a leading
3176 // membar it's possible for a simple Dekker test to fail if loads
3177 // use LDR;DMB but stores use STLR. This can happen if C2 compiles
3178 // the stores in one method and we interpret the loads in another.
3179 if (!CompilerConfig::is_c1_or_interpreter_only_no_jvmci()) {
3180 Label notVolatile;
3181 __ tbz(r3, ResolvedFieldEntry::is_volatile_shift, notVolatile);
3182 __ membar(MacroAssembler::AnyAny);
3183 __ bind(notVolatile);
3184 }
3185
3186 // access field
3187 switch (bytecode()) {
3188 case Bytecodes::_fast_agetfield:
3189 do_oop_load(_masm, field, r0, IN_HEAP);
3190 __ verify_oop(r0);
3191 break;
3192 case Bytecodes::_fast_lgetfield:
3193 __ access_load_at(T_LONG, IN_HEAP, r0, field, noreg, noreg);
3194 break;
3195 case Bytecodes::_fast_igetfield:
3196 __ access_load_at(T_INT, IN_HEAP, r0, field, noreg, noreg);
3197 break;
3198 case Bytecodes::_fast_bgetfield:
3199 __ access_load_at(T_BYTE, IN_HEAP, r0, field, noreg, noreg);
3200 break;
3201 case Bytecodes::_fast_sgetfield:
3202 __ access_load_at(T_SHORT, IN_HEAP, r0, field, noreg, noreg);
3203 break;
3204 case Bytecodes::_fast_cgetfield:
3205 __ access_load_at(T_CHAR, IN_HEAP, r0, field, noreg, noreg);
3206 break;
3207 case Bytecodes::_fast_fgetfield:
3208 __ access_load_at(T_FLOAT, IN_HEAP, noreg /* ftos */, field, noreg, noreg);
3209 break;
3210 case Bytecodes::_fast_dgetfield:
3211 __ access_load_at(T_DOUBLE, IN_HEAP, noreg /* dtos */, field, noreg, noreg);
3212 break;
3213 default:
3214 ShouldNotReachHere();
3215 }
3216 {
3217 Label notVolatile;
3218 __ tbz(r3, ResolvedFieldEntry::is_volatile_shift, notVolatile);
3219 __ membar(MacroAssembler::LoadLoad | MacroAssembler::LoadStore);
3220 __ bind(notVolatile);
3221 }
3222 }
3223
3224 void TemplateTable::fast_xaccess(TosState state)
3225 {
3226 transition(vtos, state);
3227
3228 // get receiver
3229 __ ldr(r0, aaddress(0));
3230 // access constant pool cache
3231 __ load_field_entry(r2, r3, 2);
3232 __ load_sized_value(r1, Address(r2, in_bytes(ResolvedFieldEntry::field_offset_offset())), sizeof(int), true /*is_signed*/);
3233
3234 // 8179954: We need to make sure that the code generated for
3235 // volatile accesses forms a sequentially-consistent set of
3236 // operations when combined with STLR and LDAR. Without a leading
3237 // membar it's possible for a simple Dekker test to fail if loads
3238 // use LDR;DMB but stores use STLR. This can happen if C2 compiles
3239 // the stores in one method and we interpret the loads in another.
3240 if (!CompilerConfig::is_c1_or_interpreter_only_no_jvmci()) {
3241 Label notVolatile;
3242 __ load_unsigned_byte(r3, Address(r2, in_bytes(ResolvedFieldEntry::flags_offset())));
3243 __ tbz(r3, ResolvedFieldEntry::is_volatile_shift, notVolatile);
3244 __ membar(MacroAssembler::AnyAny);
3245 __ bind(notVolatile);
3246 }
3247
3248 // make sure exception is reported in correct bcp range (getfield is
3249 // next instruction)
3250 __ increment(rbcp);
3251 __ null_check(r0);
3252 switch (state) {
3253 case itos:
3254 __ access_load_at(T_INT, IN_HEAP, r0, Address(r0, r1, Address::lsl(0)), noreg, noreg);
3255 break;
3256 case atos:
3257 do_oop_load(_masm, Address(r0, r1, Address::lsl(0)), r0, IN_HEAP);
3258 __ verify_oop(r0);
3259 break;
3260 case ftos:
3261 __ access_load_at(T_FLOAT, IN_HEAP, noreg /* ftos */, Address(r0, r1, Address::lsl(0)), noreg, noreg);
3262 break;
3263 default:
3264 ShouldNotReachHere();
3265 }
3266
3267 {
3268 Label notVolatile;
3269 __ load_unsigned_byte(r3, Address(r2, in_bytes(ResolvedFieldEntry::flags_offset())));
3270 __ tbz(r3, ResolvedFieldEntry::is_volatile_shift, notVolatile);
3271 __ membar(MacroAssembler::LoadLoad | MacroAssembler::LoadStore);
3272 __ bind(notVolatile);
3273 }
3274
3275 __ decrement(rbcp);
3276 }
3277
3278
3279
3280 //-----------------------------------------------------------------------------
3281 // Calls
3282
3283 void TemplateTable::prepare_invoke(Register cache, Register recv) {
3284
3285 Bytecodes::Code code = bytecode();
3286 const bool load_receiver = (code != Bytecodes::_invokestatic) && (code != Bytecodes::_invokedynamic);
3287
3288 // save 'interpreter return address'
3289 __ save_bcp();
3290
3291 // Load TOS state for later
3292 __ load_unsigned_byte(rscratch2, Address(cache, in_bytes(ResolvedMethodEntry::type_offset())));
3293
3294 // load receiver if needed (note: no return address pushed yet)
3295 if (load_receiver) {
3296 __ load_unsigned_short(recv, Address(cache, in_bytes(ResolvedMethodEntry::num_parameters_offset())));
3297 __ add(rscratch1, esp, recv, ext::uxtx, 3);
3298 __ ldr(recv, Address(rscratch1, -Interpreter::expr_offset_in_bytes(1)));
3299 __ verify_oop(recv);
3300 }
3301
3302 // load return address
3303 {
3304 const address table_addr = (address) Interpreter::invoke_return_entry_table_for(code);
3305 __ mov(rscratch1, table_addr);
3306 __ ldr(lr, Address(rscratch1, rscratch2, Address::lsl(3)));
3307 }
3308 }
3309
3310
3311 void TemplateTable::invokevirtual_helper(Register index,
3312 Register recv,
3313 Register flags)
3314 {
3315 // Uses temporary registers r0, r3
3316 assert_different_registers(index, recv, r0, r3);
3317 // Test for an invoke of a final method
3318 Label notFinal;
3319 __ tbz(flags, ResolvedMethodEntry::is_vfinal_shift, notFinal);
3320
3321 const Register method = index; // method must be rmethod
3322 assert(method == rmethod,
3323 "Method must be rmethod for interpreter calling convention");
3324
3325 // do the call - the index is actually the method to call
3326 // that is, f2 is a vtable index if !is_vfinal, else f2 is a Method*
3327
3328 // It's final, need a null check here!
3329 __ null_check(recv);
3330
3331 // profile this call
3332 __ profile_final_call(r0);
3333 __ profile_arguments_type(r0, method, r4, true);
3334
3335 __ jump_from_interpreted(method, r0);
3336
3337 __ bind(notFinal);
3338
3339 // get receiver klass
3340 __ load_klass(r0, recv);
3341
3342 // profile this call
3343 __ profile_virtual_call(r0, rlocals, r3);
3344
3345 // get target Method & entry point
3346 __ lookup_virtual_method(r0, index, method);
3347 __ profile_arguments_type(r3, method, r4, true);
3348 // FIXME -- this looks completely redundant. is it?
3349 // __ ldr(r3, Address(method, Method::interpreter_entry_offset()));
3350 __ jump_from_interpreted(method, r3);
3351 }
3352
3353 void TemplateTable::invokevirtual(int byte_no)
3354 {
3355 transition(vtos, vtos);
3356 assert(byte_no == f2_byte, "use this argument");
3357
3358 load_resolved_method_entry_virtual(r2, // ResolvedMethodEntry*
3359 rmethod, // Method* or itable index
3360 r3); // flags
3361 prepare_invoke(r2, r2); // recv
3362
3363 // rmethod: index (actually a Method*)
3364 // r2: receiver
3365 // r3: flags
3366
3367 invokevirtual_helper(rmethod, r2, r3);
3368 }
3369
3370 void TemplateTable::invokespecial(int byte_no)
3371 {
3372 transition(vtos, vtos);
3373 assert(byte_no == f1_byte, "use this argument");
3374
3375 load_resolved_method_entry_special_or_static(r2, // ResolvedMethodEntry*
3376 rmethod, // Method*
3377 r3); // flags
3378 prepare_invoke(r2, r2); // get receiver also for null check
3379 __ verify_oop(r2);
3380 __ null_check(r2);
3381 // do the call
3382 __ profile_call(r0);
3383 __ profile_arguments_type(r0, rmethod, rbcp, false);
3384 __ jump_from_interpreted(rmethod, r0);
3385 }
3386
3387 void TemplateTable::invokestatic(int byte_no)
3388 {
3389 transition(vtos, vtos);
3390 assert(byte_no == f1_byte, "use this argument");
3391
3392 load_resolved_method_entry_special_or_static(r2, // ResolvedMethodEntry*
3393 rmethod, // Method*
3394 r3); // flags
3395 prepare_invoke(r2, r2); // get receiver also for null check
3396
3397 // do the call
3398 __ profile_call(r0);
3399 __ profile_arguments_type(r0, rmethod, r4, false);
3400 __ jump_from_interpreted(rmethod, r0);
3401 }
3402
3403 void TemplateTable::fast_invokevfinal(int byte_no)
3404 {
3405 __ call_Unimplemented();
3406 }
3407
3408 void TemplateTable::invokeinterface(int byte_no) {
3409 transition(vtos, vtos);
3410 assert(byte_no == f1_byte, "use this argument");
3411
3412 load_resolved_method_entry_interface(r2, // ResolvedMethodEntry*
3413 r0, // Klass*
3414 rmethod, // Method* or itable/vtable index
3415 r3); // flags
3416 prepare_invoke(r2, r2); // receiver
3417
3418 // r0: interface klass (from f1)
3419 // rmethod: method (from f2)
3420 // r2: receiver
3421 // r3: flags
3422
3423 // First check for Object case, then private interface method,
3424 // then regular interface method.
3425
3426 // Special case of invokeinterface called for virtual method of
3427 // java.lang.Object. See cpCache.cpp for details.
3428 Label notObjectMethod;
3429 __ tbz(r3, ResolvedMethodEntry::is_forced_virtual_shift, notObjectMethod);
3430
3431 invokevirtual_helper(rmethod, r2, r3);
3432 __ bind(notObjectMethod);
3433
3434 Label no_such_interface;
3435
3436 // Check for private method invocation - indicated by vfinal
3437 Label notVFinal;
3438 __ tbz(r3, ResolvedMethodEntry::is_vfinal_shift, notVFinal);
3439
3440 // Get receiver klass into r3
3441 __ load_klass(r3, r2);
3442
3443 Label subtype;
3444 __ check_klass_subtype(r3, r0, r4, subtype);
3445 // If we get here the typecheck failed
3446 __ b(no_such_interface);
3447 __ bind(subtype);
3448
3449 __ profile_final_call(r0);
3450 __ profile_arguments_type(r0, rmethod, r4, true);
3451 __ jump_from_interpreted(rmethod, r0);
3452
3453 __ bind(notVFinal);
3454
3455 // Get receiver klass into r3
3456 __ restore_locals();
3457 __ load_klass(r3, r2);
3458
3459 Label no_such_method;
3460
3461 // Preserve method for throw_AbstractMethodErrorVerbose.
3462 __ mov(r16, rmethod);
3463 // Receiver subtype check against REFC.
3464 // Superklass in r0. Subklass in r3. Blows rscratch2, r13
3465 __ lookup_interface_method(// inputs: rec. class, interface, itable index
3466 r3, r0, noreg,
3467 // outputs: scan temp. reg, scan temp. reg
3468 rscratch2, r13,
3469 no_such_interface,
3470 /*return_method=*/false);
3471
3472 // profile this call
3473 __ profile_virtual_call(r3, r13, r19);
3474
3475 // Get declaring interface class from method, and itable index
3476
3477 __ load_method_holder(r0, rmethod);
3478 __ ldrw(rmethod, Address(rmethod, Method::itable_index_offset()));
3479 __ subw(rmethod, rmethod, Method::itable_index_max);
3480 __ negw(rmethod, rmethod);
3481
3482 // Preserve recvKlass for throw_AbstractMethodErrorVerbose.
3483 __ mov(rlocals, r3);
3484 __ lookup_interface_method(// inputs: rec. class, interface, itable index
3485 rlocals, r0, rmethod,
3486 // outputs: method, scan temp. reg
3487 rmethod, r13,
3488 no_such_interface);
3489
3490 // rmethod,: Method to call
3491 // r2: receiver
3492 // Check for abstract method error
3493 // Note: This should be done more efficiently via a throw_abstract_method_error
3494 // interpreter entry point and a conditional jump to it in case of a null
3495 // method.
3496 __ cbz(rmethod, no_such_method);
3497
3498 __ profile_arguments_type(r3, rmethod, r13, true);
3499
3500 // do the call
3501 // r2: receiver
3502 // rmethod,: Method
3503 __ jump_from_interpreted(rmethod, r3);
3504 __ should_not_reach_here();
3505
3506 // exception handling code follows...
3507 // note: must restore interpreter registers to canonical
3508 // state for exception handling to work correctly!
3509
3510 __ bind(no_such_method);
3511 // throw exception
3512 __ restore_bcp(); // bcp must be correct for exception handler (was destroyed)
3513 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
3514 // Pass arguments for generating a verbose error message.
3515 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodErrorVerbose), r3, r16);
3516 // the call_VM checks for exception, so we should never return here.
3517 __ should_not_reach_here();
3518
3519 __ bind(no_such_interface);
3520 // throw exception
3521 __ restore_bcp(); // bcp must be correct for exception handler (was destroyed)
3522 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
3523 // Pass arguments for generating a verbose error message.
3524 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
3525 InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose), r3, r0);
3526 // the call_VM checks for exception, so we should never return here.
3527 __ should_not_reach_here();
3528 return;
3529 }
3530
3531 void TemplateTable::invokehandle(int byte_no) {
3532 transition(vtos, vtos);
3533 assert(byte_no == f1_byte, "use this argument");
3534
3535 load_resolved_method_entry_handle(r2, // ResolvedMethodEntry*
3536 rmethod, // Method*
3537 r0, // Resolved reference
3538 r3); // flags
3539 prepare_invoke(r2, r2);
3540
3541 __ verify_method_ptr(r2);
3542 __ verify_oop(r2);
3543 __ null_check(r2);
3544
3545 // FIXME: profile the LambdaForm also
3546
3547 // r13 is safe to use here as a scratch reg because it is about to
3548 // be clobbered by jump_from_interpreted().
3549 __ profile_final_call(r13);
3550 __ profile_arguments_type(r13, rmethod, r4, true);
3551
3552 __ jump_from_interpreted(rmethod, r0);
3553 }
3554
3555 void TemplateTable::invokedynamic(int byte_no) {
3556 transition(vtos, vtos);
3557 assert(byte_no == f1_byte, "use this argument");
3558
3559 load_invokedynamic_entry(rmethod);
3560
3561 // r0: CallSite object (from cpool->resolved_references[])
3562 // rmethod: MH.linkToCallSite method
3563
3564 // Note: r0_callsite is already pushed
3565
3566 // %%% should make a type profile for any invokedynamic that takes a ref argument
3567 // profile this call
3568 __ profile_call(rbcp);
3569 __ profile_arguments_type(r3, rmethod, r13, false);
3570
3571 __ verify_oop(r0);
3572
3573 __ jump_from_interpreted(rmethod, r0);
3574 }
3575
3576
3577 //-----------------------------------------------------------------------------
3578 // Allocation
3579
3580 void TemplateTable::_new() {
3581 transition(vtos, atos);
3582
3583 __ get_unsigned_2_byte_index_at_bcp(r3, 1);
3584 Label slow_case;
3585 Label done;
3586 Label initialize_header;
3587
3588 __ get_cpool_and_tags(r4, r0);
3589 // Make sure the class we're about to instantiate has been resolved.
3590 // This is done before loading InstanceKlass to be consistent with the order
3591 // how Constant Pool is updated (see ConstantPool::klass_at_put)
3592 const int tags_offset = Array<u1>::base_offset_in_bytes();
3593 __ lea(rscratch1, Address(r0, r3, Address::lsl(0)));
3594 __ lea(rscratch1, Address(rscratch1, tags_offset));
3595 __ ldarb(rscratch1, rscratch1);
3596 __ cmp(rscratch1, (u1)JVM_CONSTANT_Class);
3597 __ br(Assembler::NE, slow_case);
3598
3599 // get InstanceKlass
3600 __ load_resolved_klass_at_offset(r4, r3, r4, rscratch1);
3601
3602 // make sure klass is initialized
3603 assert(VM_Version::supports_fast_class_init_checks(), "Optimization requires support for fast class initialization checks");
3604 __ clinit_barrier(r4, rscratch1, nullptr /*L_fast_path*/, &slow_case);
3605
3606 // get instance_size in InstanceKlass (scaled to a count of bytes)
3607 __ ldrw(r3,
3608 Address(r4,
3609 Klass::layout_helper_offset()));
3610 // test to see if it is malformed in some way
3611 __ tbnz(r3, exact_log2(Klass::_lh_instance_slow_path_bit), slow_case);
3612
3613 // Allocate the instance:
3614 // If TLAB is enabled:
3615 // Try to allocate in the TLAB.
3616 // If fails, go to the slow path.
3617 // Initialize the allocation.
3618 // Exit.
3619 //
3620 // Go to slow path.
3621
3622 if (UseTLAB) {
3623 __ tlab_allocate(r0, r3, 0, noreg, r1, slow_case);
3624
3625 if (ZeroTLAB) {
3626 // the fields have been already cleared
3627 __ b(initialize_header);
3628 }
3629
3630 // The object is initialized before the header. If the object size is
3631 // zero, go directly to the header initialization.
3632 __ sub(r3, r3, sizeof(oopDesc));
3633 __ cbz(r3, initialize_header);
3634
3635 // Initialize object fields
3636 {
3637 __ add(r2, r0, sizeof(oopDesc));
3638 Label loop;
3639 __ bind(loop);
3640 __ str(zr, Address(__ post(r2, BytesPerLong)));
3641 __ sub(r3, r3, BytesPerLong);
3642 __ cbnz(r3, loop);
3643 }
3644
3645 // initialize object header only.
3646 __ bind(initialize_header);
3647 __ mov(rscratch1, (intptr_t)markWord::prototype().value());
3648 __ str(rscratch1, Address(r0, oopDesc::mark_offset_in_bytes()));
3649 __ store_klass_gap(r0, zr); // zero klass gap for compressed oops
3650 __ store_klass(r0, r4); // store klass last
3651
3652 if (DTraceAllocProbes) {
3653 // Trigger dtrace event for fastpath
3654 __ push(atos); // save the return value
3655 __ call_VM_leaf(
3656 CAST_FROM_FN_PTR(address, static_cast<int (*)(oopDesc*)>(SharedRuntime::dtrace_object_alloc)), r0);
3657 __ pop(atos); // restore the return value
3658
3659 }
3660 __ b(done);
3661 }
3662
3663 // slow case
3664 __ bind(slow_case);
3665 __ get_constant_pool(c_rarg1);
3666 __ get_unsigned_2_byte_index_at_bcp(c_rarg2, 1);
3667 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::_new), c_rarg1, c_rarg2);
3668 __ verify_oop(r0);
3669
3670 // continue
3671 __ bind(done);
3672 // Must prevent reordering of stores for object initialization with stores that publish the new object.
3673 __ membar(Assembler::StoreStore);
3674 }
3675
3676 void TemplateTable::newarray() {
3677 transition(itos, atos);
3678 __ load_unsigned_byte(c_rarg1, at_bcp(1));
3679 __ mov(c_rarg2, r0);
3680 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::newarray),
3681 c_rarg1, c_rarg2);
3682 // Must prevent reordering of stores for object initialization with stores that publish the new object.
3683 __ membar(Assembler::StoreStore);
3684 }
3685
3686 void TemplateTable::anewarray() {
3687 transition(itos, atos);
3688 __ get_unsigned_2_byte_index_at_bcp(c_rarg2, 1);
3689 __ get_constant_pool(c_rarg1);
3690 __ mov(c_rarg3, r0);
3691 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::anewarray),
3692 c_rarg1, c_rarg2, c_rarg3);
3693 // Must prevent reordering of stores for object initialization with stores that publish the new object.
3694 __ membar(Assembler::StoreStore);
3695 }
3696
3697 void TemplateTable::arraylength() {
3698 transition(atos, itos);
3699 __ ldrw(r0, Address(r0, arrayOopDesc::length_offset_in_bytes()));
3700 }
3701
3702 void TemplateTable::checkcast()
3703 {
3704 transition(atos, atos);
3705 Label done, is_null, ok_is_subtype, quicked, resolved;
3706 __ cbz(r0, is_null);
3707
3708 // Get cpool & tags index
3709 __ get_cpool_and_tags(r2, r3); // r2=cpool, r3=tags array
3710 __ get_unsigned_2_byte_index_at_bcp(r19, 1); // r19=index
3711 // See if bytecode has already been quicked
3712 __ add(rscratch1, r3, Array<u1>::base_offset_in_bytes());
3713 __ lea(r1, Address(rscratch1, r19));
3714 __ ldarb(r1, r1);
3715 __ cmp(r1, (u1)JVM_CONSTANT_Class);
3716 __ br(Assembler::EQ, quicked);
3717
3718 __ push(atos); // save receiver for result, and for GC
3719 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc));
3720 // vm_result_2 has metadata result
3721 __ get_vm_result_2(r0, rthread);
3722 __ pop(r3); // restore receiver
3723 __ b(resolved);
3724
3725 // Get superklass in r0 and subklass in r3
3726 __ bind(quicked);
3727 __ mov(r3, r0); // Save object in r3; r0 needed for subtype check
3728 __ load_resolved_klass_at_offset(r2, r19, r0, rscratch1); // r0 = klass
3729
3730 __ bind(resolved);
3731 __ load_klass(r19, r3);
3732
3733 // Generate subtype check. Blows r2, r5. Object in r3.
3734 // Superklass in r0. Subklass in r19.
3735 __ gen_subtype_check(r19, ok_is_subtype);
3736
3737 // Come here on failure
3738 __ push(r3);
3739 // object is at TOS
3740 __ b(Interpreter::_throw_ClassCastException_entry);
3741
3742 // Come here on success
3743 __ bind(ok_is_subtype);
3744 __ mov(r0, r3); // Restore object in r3
3745
3746 // Collect counts on whether this test sees nulls a lot or not.
3747 if (ProfileInterpreter) {
3748 __ b(done);
3749 __ bind(is_null);
3750 __ profile_null_seen(r2);
3751 } else {
3752 __ bind(is_null); // same as 'done'
3753 }
3754 __ bind(done);
3755 }
3756
3757 void TemplateTable::instanceof() {
3758 transition(atos, itos);
3759 Label done, is_null, ok_is_subtype, quicked, resolved;
3760 __ cbz(r0, is_null);
3761
3762 // Get cpool & tags index
3763 __ get_cpool_and_tags(r2, r3); // r2=cpool, r3=tags array
3764 __ get_unsigned_2_byte_index_at_bcp(r19, 1); // r19=index
3765 // See if bytecode has already been quicked
3766 __ add(rscratch1, r3, Array<u1>::base_offset_in_bytes());
3767 __ lea(r1, Address(rscratch1, r19));
3768 __ ldarb(r1, r1);
3769 __ cmp(r1, (u1)JVM_CONSTANT_Class);
3770 __ br(Assembler::EQ, quicked);
3771
3772 __ push(atos); // save receiver for result, and for GC
3773 call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc));
3774 // vm_result_2 has metadata result
3775 __ get_vm_result_2(r0, rthread);
3776 __ pop(r3); // restore receiver
3777 __ verify_oop(r3);
3778 __ load_klass(r3, r3);
3779 __ b(resolved);
3780
3781 // Get superklass in r0 and subklass in r3
3782 __ bind(quicked);
3783 __ load_klass(r3, r0);
3784 __ load_resolved_klass_at_offset(r2, r19, r0, rscratch1);
3785
3786 __ bind(resolved);
3787
3788 // Generate subtype check. Blows r2, r5
3789 // Superklass in r0. Subklass in r3.
3790 __ gen_subtype_check(r3, ok_is_subtype);
3791
3792 // Come here on failure
3793 __ mov(r0, 0);
3794 __ b(done);
3795 // Come here on success
3796 __ bind(ok_is_subtype);
3797 __ mov(r0, 1);
3798
3799 // Collect counts on whether this test sees nulls a lot or not.
3800 if (ProfileInterpreter) {
3801 __ b(done);
3802 __ bind(is_null);
3803 __ profile_null_seen(r2);
3804 } else {
3805 __ bind(is_null); // same as 'done'
3806 }
3807 __ bind(done);
3808 // r0 = 0: obj == nullptr or obj is not an instanceof the specified klass
3809 // r0 = 1: obj != nullptr and obj is an instanceof the specified klass
3810 }
3811
3812 //-----------------------------------------------------------------------------
3813 // Breakpoints
3814 void TemplateTable::_breakpoint() {
3815 // Note: We get here even if we are single stepping..
3816 // jbug inists on setting breakpoints at every bytecode
3817 // even if we are in single step mode.
3818
3819 transition(vtos, vtos);
3820
3821 // get the unpatched byte code
3822 __ get_method(c_rarg1);
3823 __ call_VM(noreg,
3824 CAST_FROM_FN_PTR(address,
3825 InterpreterRuntime::get_original_bytecode_at),
3826 c_rarg1, rbcp);
3827 __ mov(r19, r0);
3828
3829 // post the breakpoint event
3830 __ call_VM(noreg,
3831 CAST_FROM_FN_PTR(address, InterpreterRuntime::_breakpoint),
3832 rmethod, rbcp);
3833
3834 // complete the execution of original bytecode
3835 __ mov(rscratch1, r19);
3836 __ dispatch_only_normal(vtos);
3837 }
3838
3839 //-----------------------------------------------------------------------------
3840 // Exceptions
3841
3842 void TemplateTable::athrow() {
3843 transition(atos, vtos);
3844 __ null_check(r0);
3845 __ b(Interpreter::throw_exception_entry());
3846 }
3847
3848 //-----------------------------------------------------------------------------
3849 // Synchronization
3850 //
3851 // Note: monitorenter & exit are symmetric routines; which is reflected
3852 // in the assembly code structure as well
3853 //
3854 // Stack layout:
3855 //
3856 // [expressions ] <--- esp = expression stack top
3857 // ..
3858 // [expressions ]
3859 // [monitor entry] <--- monitor block top = expression stack bot
3860 // ..
3861 // [monitor entry]
3862 // [frame data ] <--- monitor block bot
3863 // ...
3864 // [saved rfp ] <--- rfp
3865 void TemplateTable::monitorenter()
3866 {
3867 transition(atos, vtos);
3868
3869 // check for null object
3870 __ null_check(r0);
3871
3872 const Address monitor_block_top(
3873 rfp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
3874 const Address monitor_block_bot(
3875 rfp, frame::interpreter_frame_initial_sp_offset * wordSize);
3876 const int entry_size = frame::interpreter_frame_monitor_size_in_bytes();
3877
3878 Label allocated;
3879
3880 // initialize entry pointer
3881 __ mov(c_rarg1, zr); // points to free slot or null
3882
3883 // find a free slot in the monitor block (result in c_rarg1)
3884 {
3885 Label entry, loop, exit;
3886 __ ldr(c_rarg3, monitor_block_top); // derelativize pointer
3887 __ lea(c_rarg3, Address(rfp, c_rarg3, Address::lsl(Interpreter::logStackElementSize)));
3888 // c_rarg3 points to current entry, starting with top-most entry
3889
3890 __ lea(c_rarg2, monitor_block_bot); // points to word before bottom
3891
3892 __ b(entry);
3893
3894 __ bind(loop);
3895 // check if current entry is used
3896 // if not used then remember entry in c_rarg1
3897 __ ldr(rscratch1, Address(c_rarg3, BasicObjectLock::obj_offset()));
3898 __ cmp(zr, rscratch1);
3899 __ csel(c_rarg1, c_rarg3, c_rarg1, Assembler::EQ);
3900 // check if current entry is for same object
3901 __ cmp(r0, rscratch1);
3902 // if same object then stop searching
3903 __ br(Assembler::EQ, exit);
3904 // otherwise advance to next entry
3905 __ add(c_rarg3, c_rarg3, entry_size);
3906 __ bind(entry);
3907 // check if bottom reached
3908 __ cmp(c_rarg3, c_rarg2);
3909 // if not at bottom then check this entry
3910 __ br(Assembler::NE, loop);
3911 __ bind(exit);
3912 }
3913
3914 __ cbnz(c_rarg1, allocated); // check if a slot has been found and
3915 // if found, continue with that on
3916
3917 // allocate one if there's no free slot
3918 {
3919 Label entry, loop;
3920 // 1. compute new pointers // rsp: old expression stack top
3921
3922 __ check_extended_sp();
3923 __ sub(sp, sp, entry_size); // make room for the monitor
3924 __ sub(rscratch1, sp, rfp);
3925 __ asr(rscratch1, rscratch1, Interpreter::logStackElementSize);
3926 __ str(rscratch1, Address(rfp, frame::interpreter_frame_extended_sp_offset * wordSize));
3927
3928 __ ldr(c_rarg1, monitor_block_bot); // derelativize pointer
3929 __ lea(c_rarg1, Address(rfp, c_rarg1, Address::lsl(Interpreter::logStackElementSize)));
3930 // c_rarg1 points to the old expression stack bottom
3931
3932 __ sub(esp, esp, entry_size); // move expression stack top
3933 __ sub(c_rarg1, c_rarg1, entry_size); // move expression stack bottom
3934 __ mov(c_rarg3, esp); // set start value for copy loop
3935 __ sub(rscratch1, c_rarg1, rfp); // relativize pointer
3936 __ asr(rscratch1, rscratch1, Interpreter::logStackElementSize);
3937 __ str(rscratch1, monitor_block_bot); // set new monitor block bottom
3938
3939 __ b(entry);
3940 // 2. move expression stack contents
3941 __ bind(loop);
3942 __ ldr(c_rarg2, Address(c_rarg3, entry_size)); // load expression stack
3943 // word from old location
3944 __ str(c_rarg2, Address(c_rarg3, 0)); // and store it at new location
3945 __ add(c_rarg3, c_rarg3, wordSize); // advance to next word
3946 __ bind(entry);
3947 __ cmp(c_rarg3, c_rarg1); // check if bottom reached
3948 __ br(Assembler::NE, loop); // if not at bottom then
3949 // copy next word
3950 }
3951
3952 // call run-time routine
3953 // c_rarg1: points to monitor entry
3954 __ bind(allocated);
3955
3956 // Increment bcp to point to the next bytecode, so exception
3957 // handling for async. exceptions work correctly.
3958 // The object has already been popped from the stack, so the
3959 // expression stack looks correct.
3960 __ increment(rbcp);
3961
3962 // store object
3963 __ str(r0, Address(c_rarg1, BasicObjectLock::obj_offset()));
3964 __ lock_object(c_rarg1);
3965
3966 // check to make sure this monitor doesn't cause stack overflow after locking
3967 __ save_bcp(); // in case of exception
3968 __ generate_stack_overflow_check(0);
3969
3970 // The bcp has already been incremented. Just need to dispatch to
3971 // next instruction.
3972 __ dispatch_next(vtos);
3973 }
3974
3975
3976 void TemplateTable::monitorexit()
3977 {
3978 transition(atos, vtos);
3979
3980 // check for null object
3981 __ null_check(r0);
3982
3983 const Address monitor_block_top(
3984 rfp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
3985 const Address monitor_block_bot(
3986 rfp, frame::interpreter_frame_initial_sp_offset * wordSize);
3987 const int entry_size = frame::interpreter_frame_monitor_size_in_bytes();
3988
3989 Label found;
3990
3991 // find matching slot
3992 {
3993 Label entry, loop;
3994 __ ldr(c_rarg1, monitor_block_top); // derelativize pointer
3995 __ lea(c_rarg1, Address(rfp, c_rarg1, Address::lsl(Interpreter::logStackElementSize)));
3996 // c_rarg1 points to current entry, starting with top-most entry
3997
3998 __ lea(c_rarg2, monitor_block_bot); // points to word before bottom
3999 // of monitor block
4000 __ b(entry);
4001
4002 __ bind(loop);
4003 // check if current entry is for same object
4004 __ ldr(rscratch1, Address(c_rarg1, BasicObjectLock::obj_offset()));
4005 __ cmp(r0, rscratch1);
4006 // if same object then stop searching
4007 __ br(Assembler::EQ, found);
4008 // otherwise advance to next entry
4009 __ add(c_rarg1, c_rarg1, entry_size);
4010 __ bind(entry);
4011 // check if bottom reached
4012 __ cmp(c_rarg1, c_rarg2);
4013 // if not at bottom then check this entry
4014 __ br(Assembler::NE, loop);
4015 }
4016
4017 // error handling. Unlocking was not block-structured
4018 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
4019 InterpreterRuntime::throw_illegal_monitor_state_exception));
4020 __ should_not_reach_here();
4021
4022 // call run-time routine
4023 __ bind(found);
4024 __ push_ptr(r0); // make sure object is on stack (contract with oopMaps)
4025 __ unlock_object(c_rarg1);
4026 __ pop_ptr(r0); // discard object
4027 }
4028
4029
4030 // Wide instructions
4031 void TemplateTable::wide()
4032 {
4033 __ load_unsigned_byte(r19, at_bcp(1));
4034 __ mov(rscratch1, (address)Interpreter::_wentry_point);
4035 __ ldr(rscratch1, Address(rscratch1, r19, Address::uxtw(3)));
4036 __ br(rscratch1);
4037 }
4038
4039
4040 // Multi arrays
4041 void TemplateTable::multianewarray() {
4042 transition(vtos, atos);
4043 __ load_unsigned_byte(r0, at_bcp(3)); // get number of dimensions
4044 // last dim is on top of stack; we want address of first one:
4045 // first_addr = last_addr + (ndims - 1) * wordSize
4046 __ lea(c_rarg1, Address(esp, r0, Address::uxtw(3)));
4047 __ sub(c_rarg1, c_rarg1, wordSize);
4048 call_VM(r0,
4049 CAST_FROM_FN_PTR(address, InterpreterRuntime::multianewarray),
4050 c_rarg1);
4051 __ load_unsigned_byte(r1, at_bcp(3));
4052 __ lea(esp, Address(esp, r1, Address::uxtw(3)));
4053 }