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comparison src/cpu/x86/vm/templateInterpreter_x86_32.cpp @ 0:a61af66fc99e jdk7-b24

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1 /*
2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 #include "incls/_precompiled.incl"
26 #include "incls/_templateInterpreter_x86_32.cpp.incl"
27
28 #define __ _masm->
29
30
31 #ifndef CC_INTERP
32 const int method_offset = frame::interpreter_frame_method_offset * wordSize;
33 const int bci_offset = frame::interpreter_frame_bcx_offset * wordSize;
34 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;
35
36 //------------------------------------------------------------------------------------------------------------------------
37
38 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
39 address entry = __ pc();
40
41 // Note: There should be a minimal interpreter frame set up when stack
42 // overflow occurs since we check explicitly for it now.
43 //
44 #ifdef ASSERT
45 { Label L;
46 __ leal(rax, Address(rbp,
47 frame::interpreter_frame_monitor_block_top_offset * wordSize));
48 __ cmpl(rax, rsp); // rax, = maximal rsp for current rbp,
49 // (stack grows negative)
50 __ jcc(Assembler::aboveEqual, L); // check if frame is complete
51 __ stop ("interpreter frame not set up");
52 __ bind(L);
53 }
54 #endif // ASSERT
55 // Restore bcp under the assumption that the current frame is still
56 // interpreted
57 __ restore_bcp();
58
59 // expression stack must be empty before entering the VM if an exception
60 // happened
61 __ empty_expression_stack();
62 __ empty_FPU_stack();
63 // throw exception
64 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError));
65 return entry;
66 }
67
68 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(const char* name) {
69 address entry = __ pc();
70 // expression stack must be empty before entering the VM if an exception happened
71 __ empty_expression_stack();
72 __ empty_FPU_stack();
73 // setup parameters
74 // ??? convention: expect aberrant index in register rbx,
75 __ lea(rax, ExternalAddress((address)name));
76 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException), rax, rbx);
77 return entry;
78 }
79
80 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
81 address entry = __ pc();
82 // object is at TOS
83 __ popl(rax);
84 // expression stack must be empty before entering the VM if an exception
85 // happened
86 __ empty_expression_stack();
87 __ empty_FPU_stack();
88 __ call_VM(noreg,
89 CAST_FROM_FN_PTR(address,
90 InterpreterRuntime::throw_ClassCastException),
91 rax);
92 return entry;
93 }
94
95 address TemplateInterpreterGenerator::generate_exception_handler_common(const char* name, const char* message, bool pass_oop) {
96 assert(!pass_oop || message == NULL, "either oop or message but not both");
97 address entry = __ pc();
98 if (pass_oop) {
99 // object is at TOS
100 __ popl(rbx);
101 }
102 // expression stack must be empty before entering the VM if an exception happened
103 __ empty_expression_stack();
104 __ empty_FPU_stack();
105 // setup parameters
106 __ lea(rax, ExternalAddress((address)name));
107 if (pass_oop) {
108 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception), rax, rbx);
109 } else {
110 if (message != NULL) {
111 __ lea(rbx, ExternalAddress((address)message));
112 } else {
113 __ movl(rbx, NULL_WORD);
114 }
115 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), rax, rbx);
116 }
117 // throw exception
118 __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
119 return entry;
120 }
121
122
123 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) {
124 address entry = __ pc();
125 // NULL last_sp until next java call
126 __ movl(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
127 __ dispatch_next(state);
128 return entry;
129 }
130
131
132 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step) {
133 Label interpreter_entry;
134 address compiled_entry = __ pc();
135
136 #ifdef COMPILER2
137 // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases
138 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
139 for (int i = 1; i < 8; i++) {
140 __ ffree(i);
141 }
142 } else if (UseSSE < 2) {
143 __ empty_FPU_stack();
144 }
145 #endif
146 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
147 __ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled");
148 } else {
149 __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled");
150 }
151
152 __ jmp(interpreter_entry, relocInfo::none);
153 // emit a sentinel we can test for when converting an interpreter
154 // entry point to a compiled entry point.
155 __ a_long(Interpreter::return_sentinel);
156 __ a_long((int)compiled_entry);
157 address entry = __ pc();
158 __ bind(interpreter_entry);
159
160 // In SSE mode, interpreter returns FP results in xmm0 but they need
161 // to end up back on the FPU so it can operate on them.
162 if (state == ftos && UseSSE >= 1) {
163 __ subl(rsp, wordSize);
164 __ movflt(Address(rsp, 0), xmm0);
165 __ fld_s(Address(rsp, 0));
166 __ addl(rsp, wordSize);
167 } else if (state == dtos && UseSSE >= 2) {
168 __ subl(rsp, 2*wordSize);
169 __ movdbl(Address(rsp, 0), xmm0);
170 __ fld_d(Address(rsp, 0));
171 __ addl(rsp, 2*wordSize);
172 }
173
174 __ MacroAssembler::verify_FPU(state == ftos || state == dtos ? 1 : 0, "generate_return_entry_for in interpreter");
175
176 // Restore stack bottom in case i2c adjusted stack
177 __ movl(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
178 // and NULL it as marker that rsp is now tos until next java call
179 __ movl(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
180
181 __ restore_bcp();
182 __ restore_locals();
183 __ get_cache_and_index_at_bcp(rbx, rcx, 1);
184 __ movl(rbx, Address(rbx, rcx,
185 Address::times_4, constantPoolCacheOopDesc::base_offset() +
186 ConstantPoolCacheEntry::flags_offset()));
187 __ andl(rbx, 0xFF);
188 __ leal(rsp, Address(rsp, rbx, Interpreter::stackElementScale()));
189 __ dispatch_next(state, step);
190 return entry;
191 }
192
193
194 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step) {
195 address entry = __ pc();
196
197 // In SSE mode, FP results are in xmm0
198 if (state == ftos && UseSSE > 0) {
199 __ subl(rsp, wordSize);
200 __ movflt(Address(rsp, 0), xmm0);
201 __ fld_s(Address(rsp, 0));
202 __ addl(rsp, wordSize);
203 } else if (state == dtos && UseSSE >= 2) {
204 __ subl(rsp, 2*wordSize);
205 __ movdbl(Address(rsp, 0), xmm0);
206 __ fld_d(Address(rsp, 0));
207 __ addl(rsp, 2*wordSize);
208 }
209
210 __ MacroAssembler::verify_FPU(state == ftos || state == dtos ? 1 : 0, "generate_deopt_entry_for in interpreter");
211
212 // The stack is not extended by deopt but we must NULL last_sp as this
213 // entry is like a "return".
214 __ movl(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
215 __ restore_bcp();
216 __ restore_locals();
217 // handle exceptions
218 { Label L;
219 const Register thread = rcx;
220 __ get_thread(thread);
221 __ cmpl(Address(thread, Thread::pending_exception_offset()), NULL_WORD);
222 __ jcc(Assembler::zero, L);
223 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception));
224 __ should_not_reach_here();
225 __ bind(L);
226 }
227 __ dispatch_next(state, step);
228 return entry;
229 }
230
231
232 int AbstractInterpreter::BasicType_as_index(BasicType type) {
233 int i = 0;
234 switch (type) {
235 case T_BOOLEAN: i = 0; break;
236 case T_CHAR : i = 1; break;
237 case T_BYTE : i = 2; break;
238 case T_SHORT : i = 3; break;
239 case T_INT : // fall through
240 case T_LONG : // fall through
241 case T_VOID : i = 4; break;
242 case T_FLOAT : i = 5; break; // have to treat float and double separately for SSE
243 case T_DOUBLE : i = 6; break;
244 case T_OBJECT : // fall through
245 case T_ARRAY : i = 7; break;
246 default : ShouldNotReachHere();
247 }
248 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, "index out of bounds");
249 return i;
250 }
251
252
253 address TemplateInterpreterGenerator::generate_result_handler_for(BasicType type) {
254 address entry = __ pc();
255 switch (type) {
256 case T_BOOLEAN: __ c2bool(rax); break;
257 case T_CHAR : __ andl(rax, 0xFFFF); break;
258 case T_BYTE : __ sign_extend_byte (rax); break;
259 case T_SHORT : __ sign_extend_short(rax); break;
260 case T_INT : /* nothing to do */ break;
261 case T_DOUBLE :
262 case T_FLOAT :
263 { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp();
264 __ popl(t); // remove return address first
265 __ pop_dtos_to_rsp();
266 // Must return a result for interpreter or compiler. In SSE
267 // mode, results are returned in xmm0 and the FPU stack must
268 // be empty.
269 if (type == T_FLOAT && UseSSE >= 1) {
270 // Load ST0
271 __ fld_d(Address(rsp, 0));
272 // Store as float and empty fpu stack
273 __ fstp_s(Address(rsp, 0));
274 // and reload
275 __ movflt(xmm0, Address(rsp, 0));
276 } else if (type == T_DOUBLE && UseSSE >= 2 ) {
277 __ movdbl(xmm0, Address(rsp, 0));
278 } else {
279 // restore ST0
280 __ fld_d(Address(rsp, 0));
281 }
282 // and pop the temp
283 __ addl(rsp, 2 * wordSize);
284 __ pushl(t); // restore return address
285 }
286 break;
287 case T_OBJECT :
288 // retrieve result from frame
289 __ movl(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
290 // and verify it
291 __ verify_oop(rax);
292 break;
293 default : ShouldNotReachHere();
294 }
295 __ ret(0); // return from result handler
296 return entry;
297 }
298
299 address TemplateInterpreterGenerator::generate_safept_entry_for(TosState state, address runtime_entry) {
300 address entry = __ pc();
301 __ push(state);
302 __ call_VM(noreg, runtime_entry);
303 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
304 return entry;
305 }
306
307
308 // Helpers for commoning out cases in the various type of method entries.
309 //
310
311 // increment invocation count & check for overflow
312 //
313 // Note: checking for negative value instead of overflow
314 // so we have a 'sticky' overflow test
315 //
316 // rbx,: method
317 // rcx: invocation counter
318 //
319 void InterpreterGenerator::generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue) {
320
321 const Address invocation_counter(rbx, methodOopDesc::invocation_counter_offset() + InvocationCounter::counter_offset());
322 const Address backedge_counter (rbx, methodOopDesc::backedge_counter_offset() + InvocationCounter::counter_offset());
323
324 if (ProfileInterpreter) { // %%% Merge this into methodDataOop
325 __ increment(Address(rbx,methodOopDesc::interpreter_invocation_counter_offset()));
326 }
327 // Update standard invocation counters
328 __ movl(rax, backedge_counter); // load backedge counter
329
330 __ increment(rcx, InvocationCounter::count_increment);
331 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits
332
333 __ movl(invocation_counter, rcx); // save invocation count
334 __ addl(rcx, rax); // add both counters
335
336 // profile_method is non-null only for interpreted method so
337 // profile_method != NULL == !native_call
338 // BytecodeInterpreter only calls for native so code is elided.
339
340 if (ProfileInterpreter && profile_method != NULL) {
341 // Test to see if we should create a method data oop
342 __ cmp32(rcx,
343 ExternalAddress((address)&InvocationCounter::InterpreterProfileLimit));
344 __ jcc(Assembler::less, *profile_method_continue);
345
346 // if no method data exists, go to profile_method
347 __ test_method_data_pointer(rax, *profile_method);
348 }
349
350 __ cmp32(rcx,
351 ExternalAddress((address)&InvocationCounter::InterpreterInvocationLimit));
352 __ jcc(Assembler::aboveEqual, *overflow);
353
354 }
355
356 void InterpreterGenerator::generate_counter_overflow(Label* do_continue) {
357
358 // Asm interpreter on entry
359 // rdi - locals
360 // rsi - bcp
361 // rbx, - method
362 // rdx - cpool
363 // rbp, - interpreter frame
364
365 // C++ interpreter on entry
366 // rsi - new interpreter state pointer
367 // rbp - interpreter frame pointer
368 // rbx - method
369
370 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
371 // rbx, - method
372 // rcx - rcvr (assuming there is one)
373 // top of stack return address of interpreter caller
374 // rsp - sender_sp
375
376 // C++ interpreter only
377 // rsi - previous interpreter state pointer
378
379 const Address size_of_parameters(rbx, methodOopDesc::size_of_parameters_offset());
380
381 // InterpreterRuntime::frequency_counter_overflow takes one argument
382 // indicating if the counter overflow occurs at a backwards branch (non-NULL bcp).
383 // The call returns the address of the verified entry point for the method or NULL
384 // if the compilation did not complete (either went background or bailed out).
385 __ movl(rax, (int)false);
386 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), rax);
387
388 __ movl(rbx, Address(rbp, method_offset)); // restore methodOop
389
390 // Preserve invariant that rsi/rdi contain bcp/locals of sender frame
391 // and jump to the interpreted entry.
392 __ jmp(*do_continue, relocInfo::none);
393
394 }
395
396 void InterpreterGenerator::generate_stack_overflow_check(void) {
397 // see if we've got enough room on the stack for locals plus overhead.
398 // the expression stack grows down incrementally, so the normal guard
399 // page mechanism will work for that.
400 //
401 // Registers live on entry:
402 //
403 // Asm interpreter
404 // rdx: number of additional locals this frame needs (what we must check)
405 // rbx,: methodOop
406
407 // destroyed on exit
408 // rax,
409
410 // NOTE: since the additional locals are also always pushed (wasn't obvious in
411 // generate_method_entry) so the guard should work for them too.
412 //
413
414 // monitor entry size: see picture of stack set (generate_method_entry) and frame_x86.hpp
415 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
416
417 // total overhead size: entry_size + (saved rbp, thru expr stack bottom).
418 // be sure to change this if you add/subtract anything to/from the overhead area
419 const int overhead_size = -(frame::interpreter_frame_initial_sp_offset*wordSize) + entry_size;
420
421 const int page_size = os::vm_page_size();
422
423 Label after_frame_check;
424
425 // see if the frame is greater than one page in size. If so,
426 // then we need to verify there is enough stack space remaining
427 // for the additional locals.
428 __ cmpl(rdx, (page_size - overhead_size)/Interpreter::stackElementSize());
429 __ jcc(Assembler::belowEqual, after_frame_check);
430
431 // compute rsp as if this were going to be the last frame on
432 // the stack before the red zone
433
434 Label after_frame_check_pop;
435
436 __ pushl(rsi);
437
438 const Register thread = rsi;
439
440 __ get_thread(thread);
441
442 const Address stack_base(thread, Thread::stack_base_offset());
443 const Address stack_size(thread, Thread::stack_size_offset());
444
445 // locals + overhead, in bytes
446 __ leal(rax, Address(noreg, rdx, Interpreter::stackElementScale(), overhead_size));
447
448 #ifdef ASSERT
449 Label stack_base_okay, stack_size_okay;
450 // verify that thread stack base is non-zero
451 __ cmpl(stack_base, 0);
452 __ jcc(Assembler::notEqual, stack_base_okay);
453 __ stop("stack base is zero");
454 __ bind(stack_base_okay);
455 // verify that thread stack size is non-zero
456 __ cmpl(stack_size, 0);
457 __ jcc(Assembler::notEqual, stack_size_okay);
458 __ stop("stack size is zero");
459 __ bind(stack_size_okay);
460 #endif
461
462 // Add stack base to locals and subtract stack size
463 __ addl(rax, stack_base);
464 __ subl(rax, stack_size);
465
466 // Use the maximum number of pages we might bang.
467 const int max_pages = StackShadowPages > (StackRedPages+StackYellowPages) ? StackShadowPages :
468 (StackRedPages+StackYellowPages);
469 __ addl(rax, max_pages * page_size);
470
471 // check against the current stack bottom
472 __ cmpl(rsp, rax);
473 __ jcc(Assembler::above, after_frame_check_pop);
474
475 __ popl(rsi); // get saved bcp / (c++ prev state ).
476
477 __ popl(rax); // get return address
478 __ jump(ExternalAddress(Interpreter::throw_StackOverflowError_entry()));
479
480 // all done with frame size check
481 __ bind(after_frame_check_pop);
482 __ popl(rsi);
483
484 __ bind(after_frame_check);
485 }
486
487 // Allocate monitor and lock method (asm interpreter)
488 // rbx, - methodOop
489 //
490 void InterpreterGenerator::lock_method(void) {
491 // synchronize method
492 const Address access_flags (rbx, methodOopDesc::access_flags_offset());
493 const Address monitor_block_top (rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
494 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
495
496 #ifdef ASSERT
497 { Label L;
498 __ movl(rax, access_flags);
499 __ testl(rax, JVM_ACC_SYNCHRONIZED);
500 __ jcc(Assembler::notZero, L);
501 __ stop("method doesn't need synchronization");
502 __ bind(L);
503 }
504 #endif // ASSERT
505 // get synchronization object
506 { Label done;
507 const int mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
508 __ movl(rax, access_flags);
509 __ testl(rax, JVM_ACC_STATIC);
510 __ movl(rax, Address(rdi, Interpreter::local_offset_in_bytes(0))); // get receiver (assume this is frequent case)
511 __ jcc(Assembler::zero, done);
512 __ movl(rax, Address(rbx, methodOopDesc::constants_offset()));
513 __ movl(rax, Address(rax, constantPoolOopDesc::pool_holder_offset_in_bytes()));
514 __ movl(rax, Address(rax, mirror_offset));
515 __ bind(done);
516 }
517 // add space for monitor & lock
518 __ subl(rsp, entry_size); // add space for a monitor entry
519 __ movl(monitor_block_top, rsp); // set new monitor block top
520 __ movl(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax); // store object
521 __ movl(rdx, rsp); // object address
522 __ lock_object(rdx);
523 }
524
525 //
526 // Generate a fixed interpreter frame. This is identical setup for interpreted methods
527 // and for native methods hence the shared code.
528
529 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
530 // initialize fixed part of activation frame
531 __ pushl(rax); // save return address
532 __ enter(); // save old & set new rbp,
533
534
535 __ pushl(rsi); // set sender sp
536 __ pushl(NULL_WORD); // leave last_sp as null
537 __ movl(rsi, Address(rbx,methodOopDesc::const_offset())); // get constMethodOop
538 __ leal(rsi, Address(rsi,constMethodOopDesc::codes_offset())); // get codebase
539 __ pushl(rbx); // save methodOop
540 if (ProfileInterpreter) {
541 Label method_data_continue;
542 __ movl(rdx, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
543 __ testl(rdx, rdx);
544 __ jcc(Assembler::zero, method_data_continue);
545 __ addl(rdx, in_bytes(methodDataOopDesc::data_offset()));
546 __ bind(method_data_continue);
547 __ pushl(rdx); // set the mdp (method data pointer)
548 } else {
549 __ pushl(0);
550 }
551
552 __ movl(rdx, Address(rbx, methodOopDesc::constants_offset()));
553 __ movl(rdx, Address(rdx, constantPoolOopDesc::cache_offset_in_bytes()));
554 __ pushl(rdx); // set constant pool cache
555 __ pushl(rdi); // set locals pointer
556 if (native_call) {
557 __ pushl(0); // no bcp
558 } else {
559 __ pushl(rsi); // set bcp
560 }
561 __ pushl(0); // reserve word for pointer to expression stack bottom
562 __ movl(Address(rsp, 0), rsp); // set expression stack bottom
563 }
564
565 // End of helpers
566
567 //
568 // Various method entries
569 //------------------------------------------------------------------------------------------------------------------------
570 //
571 //
572
573 // Call an accessor method (assuming it is resolved, otherwise drop into vanilla (slow path) entry
574
575 address InterpreterGenerator::generate_accessor_entry(void) {
576
577 // rbx,: methodOop
578 // rcx: receiver (preserve for slow entry into asm interpreter)
579
580 // rsi: senderSP must preserved for slow path, set SP to it on fast path
581
582 address entry_point = __ pc();
583 Label xreturn_path;
584
585 // do fastpath for resolved accessor methods
586 if (UseFastAccessorMethods) {
587 Label slow_path;
588 // If we need a safepoint check, generate full interpreter entry.
589 ExternalAddress state(SafepointSynchronize::address_of_state());
590 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
591 SafepointSynchronize::_not_synchronized);
592
593 __ jcc(Assembler::notEqual, slow_path);
594 // ASM/C++ Interpreter
595 // Code: _aload_0, _(i|a)getfield, _(i|a)return or any rewrites thereof; parameter size = 1
596 // Note: We can only use this code if the getfield has been resolved
597 // and if we don't have a null-pointer exception => check for
598 // these conditions first and use slow path if necessary.
599 // rbx,: method
600 // rcx: receiver
601 __ movl(rax, Address(rsp, wordSize));
602
603 // check if local 0 != NULL and read field
604 __ testl(rax, rax);
605 __ jcc(Assembler::zero, slow_path);
606
607 __ movl(rdi, Address(rbx, methodOopDesc::constants_offset()));
608 // read first instruction word and extract bytecode @ 1 and index @ 2
609 __ movl(rdx, Address(rbx, methodOopDesc::const_offset()));
610 __ movl(rdx, Address(rdx, constMethodOopDesc::codes_offset()));
611 // Shift codes right to get the index on the right.
612 // The bytecode fetched looks like <index><0xb4><0x2a>
613 __ shrl(rdx, 2*BitsPerByte);
614 __ shll(rdx, exact_log2(in_words(ConstantPoolCacheEntry::size())));
615 __ movl(rdi, Address(rdi, constantPoolOopDesc::cache_offset_in_bytes()));
616
617 // rax,: local 0
618 // rbx,: method
619 // rcx: receiver - do not destroy since it is needed for slow path!
620 // rcx: scratch
621 // rdx: constant pool cache index
622 // rdi: constant pool cache
623 // rsi: sender sp
624
625 // check if getfield has been resolved and read constant pool cache entry
626 // check the validity of the cache entry by testing whether _indices field
627 // contains Bytecode::_getfield in b1 byte.
628 assert(in_words(ConstantPoolCacheEntry::size()) == 4, "adjust shift below");
629 __ movl(rcx,
630 Address(rdi,
631 rdx,
632 Address::times_4, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::indices_offset()));
633 __ shrl(rcx, 2*BitsPerByte);
634 __ andl(rcx, 0xFF);
635 __ cmpl(rcx, Bytecodes::_getfield);
636 __ jcc(Assembler::notEqual, slow_path);
637
638 // Note: constant pool entry is not valid before bytecode is resolved
639 __ movl(rcx,
640 Address(rdi,
641 rdx,
642 Address::times_4, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::f2_offset()));
643 __ movl(rdx,
644 Address(rdi,
645 rdx,
646 Address::times_4, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::flags_offset()));
647
648 Label notByte, notShort, notChar;
649 const Address field_address (rax, rcx, Address::times_1);
650
651 // Need to differentiate between igetfield, agetfield, bgetfield etc.
652 // because they are different sizes.
653 // Use the type from the constant pool cache
654 __ shrl(rdx, ConstantPoolCacheEntry::tosBits);
655 // Make sure we don't need to mask rdx for tosBits after the above shift
656 ConstantPoolCacheEntry::verify_tosBits();
657 __ cmpl(rdx, btos);
658 __ jcc(Assembler::notEqual, notByte);
659 __ load_signed_byte(rax, field_address);
660 __ jmp(xreturn_path);
661
662 __ bind(notByte);
663 __ cmpl(rdx, stos);
664 __ jcc(Assembler::notEqual, notShort);
665 __ load_signed_word(rax, field_address);
666 __ jmp(xreturn_path);
667
668 __ bind(notShort);
669 __ cmpl(rdx, ctos);
670 __ jcc(Assembler::notEqual, notChar);
671 __ load_unsigned_word(rax, field_address);
672 __ jmp(xreturn_path);
673
674 __ bind(notChar);
675 #ifdef ASSERT
676 Label okay;
677 __ cmpl(rdx, atos);
678 __ jcc(Assembler::equal, okay);
679 __ cmpl(rdx, itos);
680 __ jcc(Assembler::equal, okay);
681 __ stop("what type is this?");
682 __ bind(okay);
683 #endif // ASSERT
684 // All the rest are a 32 bit wordsize
685 __ movl(rax, field_address);
686
687 __ bind(xreturn_path);
688
689 // _ireturn/_areturn
690 __ popl(rdi); // get return address
691 __ movl(rsp, rsi); // set sp to sender sp
692 __ jmp(rdi);
693
694 // generate a vanilla interpreter entry as the slow path
695 __ bind(slow_path);
696
697 (void) generate_normal_entry(false);
698 return entry_point;
699 }
700 return NULL;
701
702 }
703
704 //
705 // Interpreter stub for calling a native method. (asm interpreter)
706 // This sets up a somewhat different looking stack for calling the native method
707 // than the typical interpreter frame setup.
708 //
709
710 address InterpreterGenerator::generate_native_entry(bool synchronized) {
711 // determine code generation flags
712 bool inc_counter = UseCompiler || CountCompiledCalls;
713
714 // rbx,: methodOop
715 // rsi: sender sp
716 // rsi: previous interpreter state (C++ interpreter) must preserve
717 address entry_point = __ pc();
718
719
720 const Address size_of_parameters(rbx, methodOopDesc::size_of_parameters_offset());
721 const Address invocation_counter(rbx, methodOopDesc::invocation_counter_offset() + InvocationCounter::counter_offset());
722 const Address access_flags (rbx, methodOopDesc::access_flags_offset());
723
724 // get parameter size (always needed)
725 __ load_unsigned_word(rcx, size_of_parameters);
726
727 // native calls don't need the stack size check since they have no expression stack
728 // and the arguments are already on the stack and we only add a handful of words
729 // to the stack
730
731 // rbx,: methodOop
732 // rcx: size of parameters
733 // rsi: sender sp
734
735 __ popl(rax); // get return address
736 // for natives the size of locals is zero
737
738 // compute beginning of parameters (rdi)
739 __ leal(rdi, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
740
741
742 // add 2 zero-initialized slots for native calls
743 // NULL result handler
744 __ pushl(NULL_WORD);
745 // NULL oop temp (mirror or jni oop result)
746 __ pushl(NULL_WORD);
747
748 if (inc_counter) __ movl(rcx, invocation_counter); // (pre-)fetch invocation count
749 // initialize fixed part of activation frame
750
751 generate_fixed_frame(true);
752
753 // make sure method is native & not abstract
754 #ifdef ASSERT
755 __ movl(rax, access_flags);
756 {
757 Label L;
758 __ testl(rax, JVM_ACC_NATIVE);
759 __ jcc(Assembler::notZero, L);
760 __ stop("tried to execute non-native method as native");
761 __ bind(L);
762 }
763 { Label L;
764 __ testl(rax, JVM_ACC_ABSTRACT);
765 __ jcc(Assembler::zero, L);
766 __ stop("tried to execute abstract method in interpreter");
767 __ bind(L);
768 }
769 #endif
770
771 // Since at this point in the method invocation the exception handler
772 // would try to exit the monitor of synchronized methods which hasn't
773 // been entered yet, we set the thread local variable
774 // _do_not_unlock_if_synchronized to true. The remove_activation will
775 // check this flag.
776
777 __ get_thread(rax);
778 const Address do_not_unlock_if_synchronized(rax,
779 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
780 __ movbool(do_not_unlock_if_synchronized, true);
781
782 // increment invocation count & check for overflow
783 Label invocation_counter_overflow;
784 if (inc_counter) {
785 generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
786 }
787
788 Label continue_after_compile;
789 __ bind(continue_after_compile);
790
791 bang_stack_shadow_pages(true);
792
793 // reset the _do_not_unlock_if_synchronized flag
794 __ get_thread(rax);
795 __ movbool(do_not_unlock_if_synchronized, false);
796
797 // check for synchronized methods
798 // Must happen AFTER invocation_counter check and stack overflow check,
799 // so method is not locked if overflows.
800 //
801 if (synchronized) {
802 lock_method();
803 } else {
804 // no synchronization necessary
805 #ifdef ASSERT
806 { Label L;
807 __ movl(rax, access_flags);
808 __ testl(rax, JVM_ACC_SYNCHRONIZED);
809 __ jcc(Assembler::zero, L);
810 __ stop("method needs synchronization");
811 __ bind(L);
812 }
813 #endif
814 }
815
816 // start execution
817 #ifdef ASSERT
818 { Label L;
819 const Address monitor_block_top (rbp,
820 frame::interpreter_frame_monitor_block_top_offset * wordSize);
821 __ movl(rax, monitor_block_top);
822 __ cmpl(rax, rsp);
823 __ jcc(Assembler::equal, L);
824 __ stop("broken stack frame setup in interpreter");
825 __ bind(L);
826 }
827 #endif
828
829 // jvmti/dtrace support
830 __ notify_method_entry();
831
832 // work registers
833 const Register method = rbx;
834 const Register thread = rdi;
835 const Register t = rcx;
836
837 // allocate space for parameters
838 __ get_method(method);
839 __ verify_oop(method);
840 __ load_unsigned_word(t, Address(method, methodOopDesc::size_of_parameters_offset()));
841 __ shll(t, Interpreter::logStackElementSize());
842 __ addl(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror
843 __ subl(rsp, t);
844 __ andl(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics
845
846 // get signature handler
847 { Label L;
848 __ movl(t, Address(method, methodOopDesc::signature_handler_offset()));
849 __ testl(t, t);
850 __ jcc(Assembler::notZero, L);
851 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method);
852 __ get_method(method);
853 __ movl(t, Address(method, methodOopDesc::signature_handler_offset()));
854 __ bind(L);
855 }
856
857 // call signature handler
858 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rdi, "adjust this code");
859 assert(InterpreterRuntime::SignatureHandlerGenerator::to () == rsp, "adjust this code");
860 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == t , "adjust this code");
861 // The generated handlers do not touch RBX (the method oop).
862 // However, large signatures cannot be cached and are generated
863 // each time here. The slow-path generator will blow RBX
864 // sometime, so we must reload it after the call.
865 __ call(t);
866 __ get_method(method); // slow path call blows RBX on DevStudio 5.0
867
868 // result handler is in rax,
869 // set result handler
870 __ movl(Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize), rax);
871
872 // pass mirror handle if static call
873 { Label L;
874 const int mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
875 __ movl(t, Address(method, methodOopDesc::access_flags_offset()));
876 __ testl(t, JVM_ACC_STATIC);
877 __ jcc(Assembler::zero, L);
878 // get mirror
879 __ movl(t, Address(method, methodOopDesc:: constants_offset()));
880 __ movl(t, Address(t, constantPoolOopDesc::pool_holder_offset_in_bytes()));
881 __ movl(t, Address(t, mirror_offset));
882 // copy mirror into activation frame
883 __ movl(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize), t);
884 // pass handle to mirror
885 __ leal(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
886 __ movl(Address(rsp, wordSize), t);
887 __ bind(L);
888 }
889
890 // get native function entry point
891 { Label L;
892 __ movl(rax, Address(method, methodOopDesc::native_function_offset()));
893 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
894 __ cmp32(rax, unsatisfied.addr());
895 __ jcc(Assembler::notEqual, L);
896 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method);
897 __ get_method(method);
898 __ verify_oop(method);
899 __ movl(rax, Address(method, methodOopDesc::native_function_offset()));
900 __ bind(L);
901 }
902
903 // pass JNIEnv
904 __ get_thread(thread);
905 __ leal(t, Address(thread, JavaThread::jni_environment_offset()));
906 __ movl(Address(rsp, 0), t);
907
908 // set_last_Java_frame_before_call
909 // It is enough that the pc()
910 // points into the right code segment. It does not have to be the correct return pc.
911 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
912
913 // change thread state
914 #ifdef ASSERT
915 { Label L;
916 __ movl(t, Address(thread, JavaThread::thread_state_offset()));
917 __ cmpl(t, _thread_in_Java);
918 __ jcc(Assembler::equal, L);
919 __ stop("Wrong thread state in native stub");
920 __ bind(L);
921 }
922 #endif
923
924 // Change state to native
925 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native);
926 __ call(rax);
927
928 // result potentially in rdx:rax or ST0
929
930 // Either restore the MXCSR register after returning from the JNI Call
931 // or verify that it wasn't changed.
932 if (VM_Version::supports_sse()) {
933 if (RestoreMXCSROnJNICalls) {
934 __ ldmxcsr(ExternalAddress(StubRoutines::addr_mxcsr_std()));
935 }
936 else if (CheckJNICalls ) {
937 __ call(RuntimeAddress(StubRoutines::i486::verify_mxcsr_entry()));
938 }
939 }
940
941 // Either restore the x87 floating pointer control word after returning
942 // from the JNI call or verify that it wasn't changed.
943 if (CheckJNICalls) {
944 __ call(RuntimeAddress(StubRoutines::i486::verify_fpu_cntrl_wrd_entry()));
945 }
946
947 // save potential result in ST(0) & rdx:rax
948 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 -
949 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers)
950 // It is safe to do this push because state is _thread_in_native and return address will be found
951 // via _last_native_pc and not via _last_jave_sp
952
953 // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result.
954 // If the order changes or anything else is added to the stack the code in
955 // interpreter_frame_result will have to be changed.
956
957 { Label L;
958 Label push_double;
959 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT));
960 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE));
961 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
962 float_handler.addr());
963 __ jcc(Assembler::equal, push_double);
964 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
965 double_handler.addr());
966 __ jcc(Assembler::notEqual, L);
967 __ bind(push_double);
968 __ push(dtos);
969 __ bind(L);
970 }
971 __ push(ltos);
972
973 // change thread state
974 __ get_thread(thread);
975 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native_trans);
976 if(os::is_MP()) {
977 if (UseMembar) {
978 __ membar(); // Force this write out before the read below
979 } else {
980 // Write serialization page so VM thread can do a pseudo remote membar.
981 // We use the current thread pointer to calculate a thread specific
982 // offset to write to within the page. This minimizes bus traffic
983 // due to cache line collision.
984 __ serialize_memory(thread, rcx);
985 }
986 }
987
988 if (AlwaysRestoreFPU) {
989 // Make sure the control word is correct.
990 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
991 }
992
993 // check for safepoint operation in progress and/or pending suspend requests
994 { Label Continue;
995
996 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
997 SafepointSynchronize::_not_synchronized);
998
999 Label L;
1000 __ jcc(Assembler::notEqual, L);
1001 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0);
1002 __ jcc(Assembler::equal, Continue);
1003 __ bind(L);
1004
1005 // Don't use call_VM as it will see a possible pending exception and forward it
1006 // and never return here preventing us from clearing _last_native_pc down below.
1007 // Also can't use call_VM_leaf either as it will check to see if rsi & rdi are
1008 // preserved and correspond to the bcp/locals pointers. So we do a runtime call
1009 // by hand.
1010 //
1011 __ pushl(thread);
1012 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address,
1013 JavaThread::check_special_condition_for_native_trans)));
1014 __ increment(rsp, wordSize);
1015 __ get_thread(thread);
1016
1017 __ bind(Continue);
1018 }
1019
1020 // change thread state
1021 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java);
1022
1023 __ reset_last_Java_frame(thread, true, true);
1024
1025 // reset handle block
1026 __ movl(t, Address(thread, JavaThread::active_handles_offset()));
1027 __ movl(Address(t, JNIHandleBlock::top_offset_in_bytes()), 0);
1028
1029 // If result was an oop then unbox and save it in the frame
1030 { Label L;
1031 Label no_oop, store_result;
1032 ExternalAddress handler(AbstractInterpreter::result_handler(T_OBJECT));
1033 __ cmpptr(Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize),
1034 handler.addr());
1035 __ jcc(Assembler::notEqual, no_oop);
1036 __ cmpl(Address(rsp, 0), NULL_WORD);
1037 __ pop(ltos);
1038 __ testl(rax, rax);
1039 __ jcc(Assembler::zero, store_result);
1040 // unbox
1041 __ movl(rax, Address(rax, 0));
1042 __ bind(store_result);
1043 __ movl(Address(rbp, (frame::interpreter_frame_oop_temp_offset)*wordSize), rax);
1044 // keep stack depth as expected by pushing oop which will eventually be discarded
1045 __ push(ltos);
1046 __ bind(no_oop);
1047 }
1048
1049 {
1050 Label no_reguard;
1051 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_yellow_disabled);
1052 __ jcc(Assembler::notEqual, no_reguard);
1053
1054 __ pushad();
1055 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1056 __ popad();
1057
1058 __ bind(no_reguard);
1059 }
1060
1061 // restore rsi to have legal interpreter frame,
1062 // i.e., bci == 0 <=> rsi == code_base()
1063 // Can't call_VM until bcp is within reasonable.
1064 __ get_method(method); // method is junk from thread_in_native to now.
1065 __ verify_oop(method);
1066 __ movl(rsi, Address(method,methodOopDesc::const_offset())); // get constMethodOop
1067 __ leal(rsi, Address(rsi,constMethodOopDesc::codes_offset())); // get codebase
1068
1069 // handle exceptions (exception handling will handle unlocking!)
1070 { Label L;
1071 __ cmpl(Address(thread, Thread::pending_exception_offset()), NULL_WORD);
1072 __ jcc(Assembler::zero, L);
1073 // Note: At some point we may want to unify this with the code used in call_VM_base();
1074 // i.e., we should use the StubRoutines::forward_exception code. For now this
1075 // doesn't work here because the rsp is not correctly set at this point.
1076 __ MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception));
1077 __ should_not_reach_here();
1078 __ bind(L);
1079 }
1080
1081 // do unlocking if necessary
1082 { Label L;
1083 __ movl(t, Address(method, methodOopDesc::access_flags_offset()));
1084 __ testl(t, JVM_ACC_SYNCHRONIZED);
1085 __ jcc(Assembler::zero, L);
1086 // the code below should be shared with interpreter macro assembler implementation
1087 { Label unlock;
1088 // BasicObjectLock will be first in list, since this is a synchronized method. However, need
1089 // to check that the object has not been unlocked by an explicit monitorexit bytecode.
1090 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock));
1091
1092 __ leal(rdx, monitor); // address of first monitor
1093
1094 __ movl(t, Address(rdx, BasicObjectLock::obj_offset_in_bytes()));
1095 __ testl(t, t);
1096 __ jcc(Assembler::notZero, unlock);
1097
1098 // Entry already unlocked, need to throw exception
1099 __ MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
1100 __ should_not_reach_here();
1101
1102 __ bind(unlock);
1103 __ unlock_object(rdx);
1104 }
1105 __ bind(L);
1106 }
1107
1108 // jvmti/dtrace support
1109 // Note: This must happen _after_ handling/throwing any exceptions since
1110 // the exception handler code notifies the runtime of method exits
1111 // too. If this happens before, method entry/exit notifications are
1112 // not properly paired (was bug - gri 11/22/99).
1113 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1114
1115 // restore potential result in rdx:rax, call result handler to restore potential result in ST0 & handle result
1116 __ pop(ltos);
1117 __ movl(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
1118 __ call(t);
1119
1120 // remove activation
1121 __ movl(t, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp
1122 __ leave(); // remove frame anchor
1123 __ popl(rdi); // get return address
1124 __ movl(rsp, t); // set sp to sender sp
1125 __ jmp(rdi);
1126
1127 if (inc_counter) {
1128 // Handle overflow of counter and compile method
1129 __ bind(invocation_counter_overflow);
1130 generate_counter_overflow(&continue_after_compile);
1131 }
1132
1133 return entry_point;
1134 }
1135
1136 //
1137 // Generic interpreted method entry to (asm) interpreter
1138 //
1139 address InterpreterGenerator::generate_normal_entry(bool synchronized) {
1140 // determine code generation flags
1141 bool inc_counter = UseCompiler || CountCompiledCalls;
1142
1143 // rbx,: methodOop
1144 // rsi: sender sp
1145 address entry_point = __ pc();
1146
1147
1148 const Address size_of_parameters(rbx, methodOopDesc::size_of_parameters_offset());
1149 const Address size_of_locals (rbx, methodOopDesc::size_of_locals_offset());
1150 const Address invocation_counter(rbx, methodOopDesc::invocation_counter_offset() + InvocationCounter::counter_offset());
1151 const Address access_flags (rbx, methodOopDesc::access_flags_offset());
1152
1153 // get parameter size (always needed)
1154 __ load_unsigned_word(rcx, size_of_parameters);
1155
1156 // rbx,: methodOop
1157 // rcx: size of parameters
1158
1159 // rsi: sender_sp (could differ from sp+wordSize if we were called via c2i )
1160
1161 __ load_unsigned_word(rdx, size_of_locals); // get size of locals in words
1162 __ subl(rdx, rcx); // rdx = no. of additional locals
1163
1164 // see if we've got enough room on the stack for locals plus overhead.
1165 generate_stack_overflow_check();
1166
1167 // get return address
1168 __ popl(rax);
1169
1170 // compute beginning of parameters (rdi)
1171 __ leal(rdi, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
1172
1173 // rdx - # of additional locals
1174 // allocate space for locals
1175 // explicitly initialize locals
1176 {
1177 Label exit, loop;
1178 __ testl(rdx, rdx);
1179 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
1180 __ bind(loop);
1181 if (TaggedStackInterpreter) __ pushl(NULL_WORD); // push tag
1182 __ pushl(NULL_WORD); // initialize local variables
1183 __ decrement(rdx); // until everything initialized
1184 __ jcc(Assembler::greater, loop);
1185 __ bind(exit);
1186 }
1187
1188 if (inc_counter) __ movl(rcx, invocation_counter); // (pre-)fetch invocation count
1189 // initialize fixed part of activation frame
1190 generate_fixed_frame(false);
1191
1192 // make sure method is not native & not abstract
1193 #ifdef ASSERT
1194 __ movl(rax, access_flags);
1195 {
1196 Label L;
1197 __ testl(rax, JVM_ACC_NATIVE);
1198 __ jcc(Assembler::zero, L);
1199 __ stop("tried to execute native method as non-native");
1200 __ bind(L);
1201 }
1202 { Label L;
1203 __ testl(rax, JVM_ACC_ABSTRACT);
1204 __ jcc(Assembler::zero, L);
1205 __ stop("tried to execute abstract method in interpreter");
1206 __ bind(L);
1207 }
1208 #endif
1209
1210 // Since at this point in the method invocation the exception handler
1211 // would try to exit the monitor of synchronized methods which hasn't
1212 // been entered yet, we set the thread local variable
1213 // _do_not_unlock_if_synchronized to true. The remove_activation will
1214 // check this flag.
1215
1216 __ get_thread(rax);
1217 const Address do_not_unlock_if_synchronized(rax,
1218 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1219 __ movbool(do_not_unlock_if_synchronized, true);
1220
1221 // increment invocation count & check for overflow
1222 Label invocation_counter_overflow;
1223 Label profile_method;
1224 Label profile_method_continue;
1225 if (inc_counter) {
1226 generate_counter_incr(&invocation_counter_overflow, &profile_method, &profile_method_continue);
1227 if (ProfileInterpreter) {
1228 __ bind(profile_method_continue);
1229 }
1230 }
1231 Label continue_after_compile;
1232 __ bind(continue_after_compile);
1233
1234 bang_stack_shadow_pages(false);
1235
1236 // reset the _do_not_unlock_if_synchronized flag
1237 __ get_thread(rax);
1238 __ movbool(do_not_unlock_if_synchronized, false);
1239
1240 // check for synchronized methods
1241 // Must happen AFTER invocation_counter check and stack overflow check,
1242 // so method is not locked if overflows.
1243 //
1244 if (synchronized) {
1245 // Allocate monitor and lock method
1246 lock_method();
1247 } else {
1248 // no synchronization necessary
1249 #ifdef ASSERT
1250 { Label L;
1251 __ movl(rax, access_flags);
1252 __ testl(rax, JVM_ACC_SYNCHRONIZED);
1253 __ jcc(Assembler::zero, L);
1254 __ stop("method needs synchronization");
1255 __ bind(L);
1256 }
1257 #endif
1258 }
1259
1260 // start execution
1261 #ifdef ASSERT
1262 { Label L;
1263 const Address monitor_block_top (rbp,
1264 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1265 __ movl(rax, monitor_block_top);
1266 __ cmpl(rax, rsp);
1267 __ jcc(Assembler::equal, L);
1268 __ stop("broken stack frame setup in interpreter");
1269 __ bind(L);
1270 }
1271 #endif
1272
1273 // jvmti support
1274 __ notify_method_entry();
1275
1276 __ dispatch_next(vtos);
1277
1278 // invocation counter overflow
1279 if (inc_counter) {
1280 if (ProfileInterpreter) {
1281 // We have decided to profile this method in the interpreter
1282 __ bind(profile_method);
1283
1284 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method), rsi, true);
1285
1286 __ movl(rbx, Address(rbp, method_offset)); // restore methodOop
1287 __ movl(rax, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
1288 __ movl(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax);
1289 __ test_method_data_pointer(rax, profile_method_continue);
1290 __ addl(rax, in_bytes(methodDataOopDesc::data_offset()));
1291 __ movl(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax);
1292 __ jmp(profile_method_continue);
1293 }
1294 // Handle overflow of counter and compile method
1295 __ bind(invocation_counter_overflow);
1296 generate_counter_overflow(&continue_after_compile);
1297 }
1298
1299 return entry_point;
1300 }
1301
1302 //------------------------------------------------------------------------------------------------------------------------
1303 // Entry points
1304 //
1305 // Here we generate the various kind of entries into the interpreter.
1306 // The two main entry type are generic bytecode methods and native call method.
1307 // These both come in synchronized and non-synchronized versions but the
1308 // frame layout they create is very similar. The other method entry
1309 // types are really just special purpose entries that are really entry
1310 // and interpretation all in one. These are for trivial methods like
1311 // accessor, empty, or special math methods.
1312 //
1313 // When control flow reaches any of the entry types for the interpreter
1314 // the following holds ->
1315 //
1316 // Arguments:
1317 //
1318 // rbx,: methodOop
1319 // rcx: receiver
1320 //
1321 //
1322 // Stack layout immediately at entry
1323 //
1324 // [ return address ] <--- rsp
1325 // [ parameter n ]
1326 // ...
1327 // [ parameter 1 ]
1328 // [ expression stack ] (caller's java expression stack)
1329
1330 // Assuming that we don't go to one of the trivial specialized
1331 // entries the stack will look like below when we are ready to execute
1332 // the first bytecode (or call the native routine). The register usage
1333 // will be as the template based interpreter expects (see interpreter_x86.hpp).
1334 //
1335 // local variables follow incoming parameters immediately; i.e.
1336 // the return address is moved to the end of the locals).
1337 //
1338 // [ monitor entry ] <--- rsp
1339 // ...
1340 // [ monitor entry ]
1341 // [ expr. stack bottom ]
1342 // [ saved rsi ]
1343 // [ current rdi ]
1344 // [ methodOop ]
1345 // [ saved rbp, ] <--- rbp,
1346 // [ return address ]
1347 // [ local variable m ]
1348 // ...
1349 // [ local variable 1 ]
1350 // [ parameter n ]
1351 // ...
1352 // [ parameter 1 ] <--- rdi
1353
1354 address AbstractInterpreterGenerator::generate_method_entry(AbstractInterpreter::MethodKind kind) {
1355 // determine code generation flags
1356 bool synchronized = false;
1357 address entry_point = NULL;
1358
1359 switch (kind) {
1360 case Interpreter::zerolocals : break;
1361 case Interpreter::zerolocals_synchronized: synchronized = true; break;
1362 case Interpreter::native : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(false); break;
1363 case Interpreter::native_synchronized : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(true); break;
1364 case Interpreter::empty : entry_point = ((InterpreterGenerator*)this)->generate_empty_entry(); break;
1365 case Interpreter::accessor : entry_point = ((InterpreterGenerator*)this)->generate_accessor_entry(); break;
1366 case Interpreter::abstract : entry_point = ((InterpreterGenerator*)this)->generate_abstract_entry(); break;
1367
1368 case Interpreter::java_lang_math_sin : // fall thru
1369 case Interpreter::java_lang_math_cos : // fall thru
1370 case Interpreter::java_lang_math_tan : // fall thru
1371 case Interpreter::java_lang_math_abs : // fall thru
1372 case Interpreter::java_lang_math_log : // fall thru
1373 case Interpreter::java_lang_math_log10 : // fall thru
1374 case Interpreter::java_lang_math_sqrt : entry_point = ((InterpreterGenerator*)this)->generate_math_entry(kind); break;
1375 default : ShouldNotReachHere(); break;
1376 }
1377
1378 if (entry_point) return entry_point;
1379
1380 return ((InterpreterGenerator*)this)->generate_normal_entry(synchronized);
1381
1382 }
1383
1384 // How much stack a method activation needs in words.
1385 int AbstractInterpreter::size_top_interpreter_activation(methodOop method) {
1386
1387 const int stub_code = 4; // see generate_call_stub
1388 // Save space for one monitor to get into the interpreted method in case
1389 // the method is synchronized
1390 int monitor_size = method->is_synchronized() ?
1391 1*frame::interpreter_frame_monitor_size() : 0;
1392
1393 // total overhead size: entry_size + (saved rbp, thru expr stack bottom).
1394 // be sure to change this if you add/subtract anything to/from the overhead area
1395 const int overhead_size = -frame::interpreter_frame_initial_sp_offset;
1396
1397 const int method_stack = (method->max_locals() + method->max_stack()) *
1398 Interpreter::stackElementWords();
1399 return overhead_size + method_stack + stub_code;
1400 }
1401
1402 // asm based interpreter deoptimization helpers
1403
1404 int AbstractInterpreter::layout_activation(methodOop method,
1405 int tempcount,
1406 int popframe_extra_args,
1407 int moncount,
1408 int callee_param_count,
1409 int callee_locals,
1410 frame* caller,
1411 frame* interpreter_frame,
1412 bool is_top_frame) {
1413 // Note: This calculation must exactly parallel the frame setup
1414 // in AbstractInterpreterGenerator::generate_method_entry.
1415 // If interpreter_frame!=NULL, set up the method, locals, and monitors.
1416 // The frame interpreter_frame, if not NULL, is guaranteed to be the right size,
1417 // as determined by a previous call to this method.
1418 // It is also guaranteed to be walkable even though it is in a skeletal state
1419 // NOTE: return size is in words not bytes
1420
1421 // fixed size of an interpreter frame:
1422 int max_locals = method->max_locals() * Interpreter::stackElementWords();
1423 int extra_locals = (method->max_locals() - method->size_of_parameters()) *
1424 Interpreter::stackElementWords();
1425
1426 int overhead = frame::sender_sp_offset - frame::interpreter_frame_initial_sp_offset;
1427
1428 // Our locals were accounted for by the caller (or last_frame_adjust on the transistion)
1429 // Since the callee parameters already account for the callee's params we only need to account for
1430 // the extra locals.
1431
1432
1433 int size = overhead +
1434 ((callee_locals - callee_param_count)*Interpreter::stackElementWords()) +
1435 (moncount*frame::interpreter_frame_monitor_size()) +
1436 tempcount*Interpreter::stackElementWords() + popframe_extra_args;
1437
1438 if (interpreter_frame != NULL) {
1439 #ifdef ASSERT
1440 assert(caller->unextended_sp() == interpreter_frame->interpreter_frame_sender_sp(), "Frame not properly walkable");
1441 assert(caller->sp() == interpreter_frame->sender_sp(), "Frame not properly walkable(2)");
1442 #endif
1443
1444 interpreter_frame->interpreter_frame_set_method(method);
1445 // NOTE the difference in using sender_sp and interpreter_frame_sender_sp
1446 // interpreter_frame_sender_sp is the original sp of the caller (the unextended_sp)
1447 // and sender_sp is fp+8
1448 intptr_t* locals = interpreter_frame->sender_sp() + max_locals - 1;
1449
1450 interpreter_frame->interpreter_frame_set_locals(locals);
1451 BasicObjectLock* montop = interpreter_frame->interpreter_frame_monitor_begin();
1452 BasicObjectLock* monbot = montop - moncount;
1453 interpreter_frame->interpreter_frame_set_monitor_end(monbot);
1454
1455 // Set last_sp
1456 intptr_t* rsp = (intptr_t*) monbot -
1457 tempcount*Interpreter::stackElementWords() -
1458 popframe_extra_args;
1459 interpreter_frame->interpreter_frame_set_last_sp(rsp);
1460
1461 // All frames but the initial (oldest) interpreter frame we fill in have a
1462 // value for sender_sp that allows walking the stack but isn't
1463 // truly correct. Correct the value here.
1464
1465 if (extra_locals != 0 &&
1466 interpreter_frame->sender_sp() == interpreter_frame->interpreter_frame_sender_sp() ) {
1467 interpreter_frame->set_interpreter_frame_sender_sp(caller->sp() + extra_locals);
1468 }
1469 *interpreter_frame->interpreter_frame_cache_addr() =
1470 method->constants()->cache();
1471 }
1472 return size;
1473 }
1474
1475
1476 //------------------------------------------------------------------------------------------------------------------------
1477 // Exceptions
1478
1479 void TemplateInterpreterGenerator::generate_throw_exception() {
1480 // Entry point in previous activation (i.e., if the caller was interpreted)
1481 Interpreter::_rethrow_exception_entry = __ pc();
1482
1483 // Restore sp to interpreter_frame_last_sp even though we are going
1484 // to empty the expression stack for the exception processing.
1485 __ movl(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
1486 // rax,: exception
1487 // rdx: return address/pc that threw exception
1488 __ restore_bcp(); // rsi points to call/send
1489 __ restore_locals();
1490
1491 // Entry point for exceptions thrown within interpreter code
1492 Interpreter::_throw_exception_entry = __ pc();
1493 // expression stack is undefined here
1494 // rax,: exception
1495 // rsi: exception bcp
1496 __ verify_oop(rax);
1497
1498 // expression stack must be empty before entering the VM in case of an exception
1499 __ empty_expression_stack();
1500 __ empty_FPU_stack();
1501 // find exception handler address and preserve exception oop
1502 __ call_VM(rdx, CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception), rax);
1503 // rax,: exception handler entry point
1504 // rdx: preserved exception oop
1505 // rsi: bcp for exception handler
1506 __ push_ptr(rdx); // push exception which is now the only value on the stack
1507 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
1508
1509 // If the exception is not handled in the current frame the frame is removed and
1510 // the exception is rethrown (i.e. exception continuation is _rethrow_exception).
1511 //
1512 // Note: At this point the bci is still the bxi for the instruction which caused
1513 // the exception and the expression stack is empty. Thus, for any VM calls
1514 // at this point, GC will find a legal oop map (with empty expression stack).
1515
1516 // In current activation
1517 // tos: exception
1518 // rsi: exception bcp
1519
1520 //
1521 // JVMTI PopFrame support
1522 //
1523
1524 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1525 __ empty_expression_stack();
1526 __ empty_FPU_stack();
1527 // Set the popframe_processing bit in pending_popframe_condition indicating that we are
1528 // currently handling popframe, so that call_VMs that may happen later do not trigger new
1529 // popframe handling cycles.
1530 __ get_thread(rcx);
1531 __ movl(rdx, Address(rcx, JavaThread::popframe_condition_offset()));
1532 __ orl(rdx, JavaThread::popframe_processing_bit);
1533 __ movl(Address(rcx, JavaThread::popframe_condition_offset()), rdx);
1534
1535 {
1536 // Check to see whether we are returning to a deoptimized frame.
1537 // (The PopFrame call ensures that the caller of the popped frame is
1538 // either interpreted or compiled and deoptimizes it if compiled.)
1539 // In this case, we can't call dispatch_next() after the frame is
1540 // popped, but instead must save the incoming arguments and restore
1541 // them after deoptimization has occurred.
1542 //
1543 // Note that we don't compare the return PC against the
1544 // deoptimization blob's unpack entry because of the presence of
1545 // adapter frames in C2.
1546 Label caller_not_deoptimized;
1547 __ movl(rdx, Address(rbp, frame::return_addr_offset * wordSize));
1548 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), rdx);
1549 __ testl(rax, rax);
1550 __ jcc(Assembler::notZero, caller_not_deoptimized);
1551
1552 // Compute size of arguments for saving when returning to deoptimized caller
1553 __ get_method(rax);
1554 __ verify_oop(rax);
1555 __ load_unsigned_word(rax, Address(rax, in_bytes(methodOopDesc::size_of_parameters_offset())));
1556 __ shll(rax, Interpreter::logStackElementSize());
1557 __ restore_locals();
1558 __ subl(rdi, rax);
1559 __ addl(rdi, wordSize);
1560 // Save these arguments
1561 __ get_thread(rcx);
1562 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args), rcx, rax, rdi);
1563
1564 __ remove_activation(vtos, rdx,
1565 /* throw_monitor_exception */ false,
1566 /* install_monitor_exception */ false,
1567 /* notify_jvmdi */ false);
1568
1569 // Inform deoptimization that it is responsible for restoring these arguments
1570 __ get_thread(rcx);
1571 __ movl(Address(rcx, JavaThread::popframe_condition_offset()), JavaThread::popframe_force_deopt_reexecution_bit);
1572
1573 // Continue in deoptimization handler
1574 __ jmp(rdx);
1575
1576 __ bind(caller_not_deoptimized);
1577 }
1578
1579 __ remove_activation(vtos, rdx,
1580 /* throw_monitor_exception */ false,
1581 /* install_monitor_exception */ false,
1582 /* notify_jvmdi */ false);
1583
1584 // Finish with popframe handling
1585 // A previous I2C followed by a deoptimization might have moved the
1586 // outgoing arguments further up the stack. PopFrame expects the
1587 // mutations to those outgoing arguments to be preserved and other
1588 // constraints basically require this frame to look exactly as
1589 // though it had previously invoked an interpreted activation with
1590 // no space between the top of the expression stack (current
1591 // last_sp) and the top of stack. Rather than force deopt to
1592 // maintain this kind of invariant all the time we call a small
1593 // fixup routine to move the mutated arguments onto the top of our
1594 // expression stack if necessary.
1595 __ movl(rax, rsp);
1596 __ movl(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1597 __ get_thread(rcx);
1598 // PC must point into interpreter here
1599 __ set_last_Java_frame(rcx, noreg, rbp, __ pc());
1600 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), rcx, rax, rbx);
1601 __ get_thread(rcx);
1602 __ reset_last_Java_frame(rcx, true, true);
1603 // Restore the last_sp and null it out
1604 __ movl(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1605 __ movl(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
1606
1607 __ restore_bcp();
1608 __ restore_locals();
1609 // The method data pointer was incremented already during
1610 // call profiling. We have to restore the mdp for the current bcp.
1611 if (ProfileInterpreter) {
1612 __ set_method_data_pointer_for_bcp();
1613 }
1614
1615 // Clear the popframe condition flag
1616 __ get_thread(rcx);
1617 __ movl(Address(rcx, JavaThread::popframe_condition_offset()), JavaThread::popframe_inactive);
1618
1619 __ dispatch_next(vtos);
1620 // end of PopFrame support
1621
1622 Interpreter::_remove_activation_entry = __ pc();
1623
1624 // preserve exception over this code sequence
1625 __ pop_ptr(rax);
1626 __ get_thread(rcx);
1627 __ movl(Address(rcx, JavaThread::vm_result_offset()), rax);
1628 // remove the activation (without doing throws on illegalMonitorExceptions)
1629 __ remove_activation(vtos, rdx, false, true, false);
1630 // restore exception
1631 __ get_thread(rcx);
1632 __ movl(rax, Address(rcx, JavaThread::vm_result_offset()));
1633 __ movl(Address(rcx, JavaThread::vm_result_offset()), NULL_WORD);
1634 __ verify_oop(rax);
1635
1636 // Inbetween activations - previous activation type unknown yet
1637 // compute continuation point - the continuation point expects
1638 // the following registers set up:
1639 //
1640 // rax,: exception
1641 // rdx: return address/pc that threw exception
1642 // rsp: expression stack of caller
1643 // rbp,: rbp, of caller
1644 __ pushl(rax); // save exception
1645 __ pushl(rdx); // save return address
1646 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), rdx);
1647 __ movl(rbx, rax); // save exception handler
1648 __ popl(rdx); // restore return address
1649 __ popl(rax); // restore exception
1650 // Note that an "issuing PC" is actually the next PC after the call
1651 __ jmp(rbx); // jump to exception handler of caller
1652 }
1653
1654
1655 //
1656 // JVMTI ForceEarlyReturn support
1657 //
1658 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1659 address entry = __ pc();
1660
1661 __ restore_bcp();
1662 __ restore_locals();
1663 __ empty_expression_stack();
1664 __ empty_FPU_stack();
1665 __ load_earlyret_value(state);
1666
1667 __ get_thread(rcx);
1668 __ movl(rcx, Address(rcx, JavaThread::jvmti_thread_state_offset()));
1669 const Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset());
1670
1671 // Clear the earlyret state
1672 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
1673
1674 __ remove_activation(state, rsi,
1675 false, /* throw_monitor_exception */
1676 false, /* install_monitor_exception */
1677 true); /* notify_jvmdi */
1678 __ jmp(rsi);
1679 return entry;
1680 } // end of ForceEarlyReturn support
1681
1682
1683 //------------------------------------------------------------------------------------------------------------------------
1684 // Helper for vtos entry point generation
1685
1686 void TemplateInterpreterGenerator::set_vtos_entry_points (Template* t, address& bep, address& cep, address& sep, address& aep, address& iep, address& lep, address& fep, address& dep, address& vep) {
1687 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1688 Label L;
1689 fep = __ pc(); __ push(ftos); __ jmp(L);
1690 dep = __ pc(); __ push(dtos); __ jmp(L);
1691 lep = __ pc(); __ push(ltos); __ jmp(L);
1692 aep = __ pc(); __ push(atos); __ jmp(L);
1693 bep = cep = sep = // fall through
1694 iep = __ pc(); __ push(itos); // fall through
1695 vep = __ pc(); __ bind(L); // fall through
1696 generate_and_dispatch(t);
1697 }
1698
1699 //------------------------------------------------------------------------------------------------------------------------
1700 // Generation of individual instructions
1701
1702 // helpers for generate_and_dispatch
1703
1704
1705
1706 InterpreterGenerator::InterpreterGenerator(StubQueue* code)
1707 : TemplateInterpreterGenerator(code) {
1708 generate_all(); // down here so it can be "virtual"
1709 }
1710
1711 //------------------------------------------------------------------------------------------------------------------------
1712
1713 // Non-product code
1714 #ifndef PRODUCT
1715 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1716 address entry = __ pc();
1717
1718 // prepare expression stack
1719 __ popl(rcx); // pop return address so expression stack is 'pure'
1720 __ push(state); // save tosca
1721
1722 // pass tosca registers as arguments & call tracer
1723 __ call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode), rcx, rax, rdx);
1724 __ movl(rcx, rax); // make sure return address is not destroyed by pop(state)
1725 __ pop(state); // restore tosca
1726
1727 // return
1728 __ jmp(rcx);
1729
1730 return entry;
1731 }
1732
1733
1734 void TemplateInterpreterGenerator::count_bytecode() {
1735 __ increment(ExternalAddress((address) &BytecodeCounter::_counter_value));
1736 }
1737
1738
1739 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
1740 __ increment(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]));
1741 }
1742
1743
1744 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
1745 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);
1746 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
1747 __ orl(rbx, ((int)t->bytecode()) << BytecodePairHistogram::log2_number_of_codes);
1748 ExternalAddress table((address) BytecodePairHistogram::_counters);
1749 Address index(noreg, rbx, Address::times_4);
1750 __ increment(ArrayAddress(table, index));
1751 }
1752
1753
1754 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1755 // Call a little run-time stub to avoid blow-up for each bytecode.
1756 // The run-time runtime saves the right registers, depending on
1757 // the tosca in-state for the given template.
1758 assert(Interpreter::trace_code(t->tos_in()) != NULL,
1759 "entry must have been generated");
1760 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1761 }
1762
1763
1764 void TemplateInterpreterGenerator::stop_interpreter_at() {
1765 Label L;
1766 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
1767 StopInterpreterAt);
1768 __ jcc(Assembler::notEqual, L);
1769 __ int3();
1770 __ bind(L);
1771 }
1772 #endif // !PRODUCT
1773 #endif // CC_INTERP