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src/cpu/x86/vm/c1_LIRAssembler_x86.cpp@037c727f35fb
src/cpu/x86/vm/c1_LIRAssembler_x86.cpp
Mon, 27 Dec 2010 21:51:31 -0800
- author
- iveresov
- date
- Mon, 27 Dec 2010 21:51:31 -0800
- changeset 2412
- 037c727f35fb
- parent 2355
- ec8c74742417
- child 2432
- 55f868e91c3b
- permissions
- -rw-r--r--
7009231: C1: Incorrect CAS code for longs on SPARC 32bit
Summary: Fix CAS of longs on SPARC 32bit and cmove on SPARC 64bit.
Reviewed-by: kvn
1 /*
2 * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #include "precompiled.hpp"
26 #include "c1/c1_Compilation.hpp"
27 #include "c1/c1_LIRAssembler.hpp"
28 #include "c1/c1_MacroAssembler.hpp"
29 #include "c1/c1_Runtime1.hpp"
30 #include "c1/c1_ValueStack.hpp"
31 #include "ci/ciArrayKlass.hpp"
32 #include "ci/ciInstance.hpp"
33 #include "gc_interface/collectedHeap.hpp"
34 #include "memory/barrierSet.hpp"
35 #include "memory/cardTableModRefBS.hpp"
36 #include "nativeInst_x86.hpp"
37 #include "oops/objArrayKlass.hpp"
38 #include "runtime/sharedRuntime.hpp"
41 // These masks are used to provide 128-bit aligned bitmasks to the XMM
42 // instructions, to allow sign-masking or sign-bit flipping. They allow
43 // fast versions of NegF/NegD and AbsF/AbsD.
45 // Note: 'double' and 'long long' have 32-bits alignment on x86.
46 static jlong* double_quadword(jlong *adr, jlong lo, jlong hi) {
47 // Use the expression (adr)&(~0xF) to provide 128-bits aligned address
48 // of 128-bits operands for SSE instructions.
49 jlong *operand = (jlong*)(((long)adr)&((long)(~0xF)));
50 // Store the value to a 128-bits operand.
51 operand[0] = lo;
52 operand[1] = hi;
53 return operand;
54 }
56 // Buffer for 128-bits masks used by SSE instructions.
57 static jlong fp_signmask_pool[(4+1)*2]; // 4*128bits(data) + 128bits(alignment)
59 // Static initialization during VM startup.
60 static jlong *float_signmask_pool = double_quadword(&fp_signmask_pool[1*2], CONST64(0x7FFFFFFF7FFFFFFF), CONST64(0x7FFFFFFF7FFFFFFF));
61 static jlong *double_signmask_pool = double_quadword(&fp_signmask_pool[2*2], CONST64(0x7FFFFFFFFFFFFFFF), CONST64(0x7FFFFFFFFFFFFFFF));
62 static jlong *float_signflip_pool = double_quadword(&fp_signmask_pool[3*2], CONST64(0x8000000080000000), CONST64(0x8000000080000000));
63 static jlong *double_signflip_pool = double_quadword(&fp_signmask_pool[4*2], CONST64(0x8000000000000000), CONST64(0x8000000000000000));
67 NEEDS_CLEANUP // remove this definitions ?
68 const Register IC_Klass = rax; // where the IC klass is cached
69 const Register SYNC_header = rax; // synchronization header
70 const Register SHIFT_count = rcx; // where count for shift operations must be
72 #define __ _masm->
75 static void select_different_registers(Register preserve,
76 Register extra,
77 Register &tmp1,
78 Register &tmp2) {
79 if (tmp1 == preserve) {
80 assert_different_registers(tmp1, tmp2, extra);
81 tmp1 = extra;
82 } else if (tmp2 == preserve) {
83 assert_different_registers(tmp1, tmp2, extra);
84 tmp2 = extra;
85 }
86 assert_different_registers(preserve, tmp1, tmp2);
87 }
91 static void select_different_registers(Register preserve,
92 Register extra,
93 Register &tmp1,
94 Register &tmp2,
95 Register &tmp3) {
96 if (tmp1 == preserve) {
97 assert_different_registers(tmp1, tmp2, tmp3, extra);
98 tmp1 = extra;
99 } else if (tmp2 == preserve) {
100 assert_different_registers(tmp1, tmp2, tmp3, extra);
101 tmp2 = extra;
102 } else if (tmp3 == preserve) {
103 assert_different_registers(tmp1, tmp2, tmp3, extra);
104 tmp3 = extra;
105 }
106 assert_different_registers(preserve, tmp1, tmp2, tmp3);
107 }
111 bool LIR_Assembler::is_small_constant(LIR_Opr opr) {
112 if (opr->is_constant()) {
113 LIR_Const* constant = opr->as_constant_ptr();
114 switch (constant->type()) {
115 case T_INT: {
116 return true;
117 }
119 default:
120 return false;
121 }
122 }
123 return false;
124 }
127 LIR_Opr LIR_Assembler::receiverOpr() {
128 return FrameMap::receiver_opr;
129 }
131 LIR_Opr LIR_Assembler::incomingReceiverOpr() {
132 return receiverOpr();
133 }
135 LIR_Opr LIR_Assembler::osrBufferPointer() {
136 return FrameMap::as_pointer_opr(receiverOpr()->as_register());
137 }
139 //--------------fpu register translations-----------------------
142 address LIR_Assembler::float_constant(float f) {
143 address const_addr = __ float_constant(f);
144 if (const_addr == NULL) {
145 bailout("const section overflow");
146 return __ code()->consts()->start();
147 } else {
148 return const_addr;
149 }
150 }
153 address LIR_Assembler::double_constant(double d) {
154 address const_addr = __ double_constant(d);
155 if (const_addr == NULL) {
156 bailout("const section overflow");
157 return __ code()->consts()->start();
158 } else {
159 return const_addr;
160 }
161 }
164 void LIR_Assembler::set_24bit_FPU() {
165 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_24()));
166 }
168 void LIR_Assembler::reset_FPU() {
169 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
170 }
172 void LIR_Assembler::fpop() {
173 __ fpop();
174 }
176 void LIR_Assembler::fxch(int i) {
177 __ fxch(i);
178 }
180 void LIR_Assembler::fld(int i) {
181 __ fld_s(i);
182 }
184 void LIR_Assembler::ffree(int i) {
185 __ ffree(i);
186 }
188 void LIR_Assembler::breakpoint() {
189 __ int3();
190 }
192 void LIR_Assembler::push(LIR_Opr opr) {
193 if (opr->is_single_cpu()) {
194 __ push_reg(opr->as_register());
195 } else if (opr->is_double_cpu()) {
196 NOT_LP64(__ push_reg(opr->as_register_hi()));
197 __ push_reg(opr->as_register_lo());
198 } else if (opr->is_stack()) {
199 __ push_addr(frame_map()->address_for_slot(opr->single_stack_ix()));
200 } else if (opr->is_constant()) {
201 LIR_Const* const_opr = opr->as_constant_ptr();
202 if (const_opr->type() == T_OBJECT) {
203 __ push_oop(const_opr->as_jobject());
204 } else if (const_opr->type() == T_INT) {
205 __ push_jint(const_opr->as_jint());
206 } else {
207 ShouldNotReachHere();
208 }
210 } else {
211 ShouldNotReachHere();
212 }
213 }
215 void LIR_Assembler::pop(LIR_Opr opr) {
216 if (opr->is_single_cpu()) {
217 __ pop_reg(opr->as_register());
218 } else {
219 ShouldNotReachHere();
220 }
221 }
223 bool LIR_Assembler::is_literal_address(LIR_Address* addr) {
224 return addr->base()->is_illegal() && addr->index()->is_illegal();
225 }
227 //-------------------------------------------
229 Address LIR_Assembler::as_Address(LIR_Address* addr) {
230 return as_Address(addr, rscratch1);
231 }
233 Address LIR_Assembler::as_Address(LIR_Address* addr, Register tmp) {
234 if (addr->base()->is_illegal()) {
235 assert(addr->index()->is_illegal(), "must be illegal too");
236 AddressLiteral laddr((address)addr->disp(), relocInfo::none);
237 if (! __ reachable(laddr)) {
238 __ movptr(tmp, laddr.addr());
239 Address res(tmp, 0);
240 return res;
241 } else {
242 return __ as_Address(laddr);
243 }
244 }
246 Register base = addr->base()->as_pointer_register();
248 if (addr->index()->is_illegal()) {
249 return Address( base, addr->disp());
250 } else if (addr->index()->is_cpu_register()) {
251 Register index = addr->index()->as_pointer_register();
252 return Address(base, index, (Address::ScaleFactor) addr->scale(), addr->disp());
253 } else if (addr->index()->is_constant()) {
254 intptr_t addr_offset = (addr->index()->as_constant_ptr()->as_jint() << addr->scale()) + addr->disp();
255 assert(Assembler::is_simm32(addr_offset), "must be");
257 return Address(base, addr_offset);
258 } else {
259 Unimplemented();
260 return Address();
261 }
262 }
265 Address LIR_Assembler::as_Address_hi(LIR_Address* addr) {
266 Address base = as_Address(addr);
267 return Address(base._base, base._index, base._scale, base._disp + BytesPerWord);
268 }
271 Address LIR_Assembler::as_Address_lo(LIR_Address* addr) {
272 return as_Address(addr);
273 }
276 void LIR_Assembler::osr_entry() {
277 offsets()->set_value(CodeOffsets::OSR_Entry, code_offset());
278 BlockBegin* osr_entry = compilation()->hir()->osr_entry();
279 ValueStack* entry_state = osr_entry->state();
280 int number_of_locks = entry_state->locks_size();
282 // we jump here if osr happens with the interpreter
283 // state set up to continue at the beginning of the
284 // loop that triggered osr - in particular, we have
285 // the following registers setup:
286 //
287 // rcx: osr buffer
288 //
290 // build frame
291 ciMethod* m = compilation()->method();
292 __ build_frame(initial_frame_size_in_bytes());
294 // OSR buffer is
295 //
296 // locals[nlocals-1..0]
297 // monitors[0..number_of_locks]
298 //
299 // locals is a direct copy of the interpreter frame so in the osr buffer
300 // so first slot in the local array is the last local from the interpreter
301 // and last slot is local[0] (receiver) from the interpreter
302 //
303 // Similarly with locks. The first lock slot in the osr buffer is the nth lock
304 // from the interpreter frame, the nth lock slot in the osr buffer is 0th lock
305 // in the interpreter frame (the method lock if a sync method)
307 // Initialize monitors in the compiled activation.
308 // rcx: pointer to osr buffer
309 //
310 // All other registers are dead at this point and the locals will be
311 // copied into place by code emitted in the IR.
313 Register OSR_buf = osrBufferPointer()->as_pointer_register();
314 { assert(frame::interpreter_frame_monitor_size() == BasicObjectLock::size(), "adjust code below");
315 int monitor_offset = BytesPerWord * method()->max_locals() +
316 (2 * BytesPerWord) * (number_of_locks - 1);
317 // SharedRuntime::OSR_migration_begin() packs BasicObjectLocks in
318 // the OSR buffer using 2 word entries: first the lock and then
319 // the oop.
320 for (int i = 0; i < number_of_locks; i++) {
321 int slot_offset = monitor_offset - ((i * 2) * BytesPerWord);
322 #ifdef ASSERT
323 // verify the interpreter's monitor has a non-null object
324 {
325 Label L;
326 __ cmpptr(Address(OSR_buf, slot_offset + 1*BytesPerWord), (int32_t)NULL_WORD);
327 __ jcc(Assembler::notZero, L);
328 __ stop("locked object is NULL");
329 __ bind(L);
330 }
331 #endif
332 __ movptr(rbx, Address(OSR_buf, slot_offset + 0));
333 __ movptr(frame_map()->address_for_monitor_lock(i), rbx);
334 __ movptr(rbx, Address(OSR_buf, slot_offset + 1*BytesPerWord));
335 __ movptr(frame_map()->address_for_monitor_object(i), rbx);
336 }
337 }
338 }
341 // inline cache check; done before the frame is built.
342 int LIR_Assembler::check_icache() {
343 Register receiver = FrameMap::receiver_opr->as_register();
344 Register ic_klass = IC_Klass;
345 const int ic_cmp_size = LP64_ONLY(10) NOT_LP64(9);
346 const bool do_post_padding = VerifyOops || UseCompressedOops;
347 if (!do_post_padding) {
348 // insert some nops so that the verified entry point is aligned on CodeEntryAlignment
349 while ((__ offset() + ic_cmp_size) % CodeEntryAlignment != 0) {
350 __ nop();
351 }
352 }
353 int offset = __ offset();
354 __ inline_cache_check(receiver, IC_Klass);
355 assert(__ offset() % CodeEntryAlignment == 0 || do_post_padding, "alignment must be correct");
356 if (do_post_padding) {
357 // force alignment after the cache check.
358 // It's been verified to be aligned if !VerifyOops
359 __ align(CodeEntryAlignment);
360 }
361 return offset;
362 }
365 void LIR_Assembler::jobject2reg_with_patching(Register reg, CodeEmitInfo* info) {
366 jobject o = NULL;
367 PatchingStub* patch = new PatchingStub(_masm, PatchingStub::load_klass_id);
368 __ movoop(reg, o);
369 patching_epilog(patch, lir_patch_normal, reg, info);
370 }
373 void LIR_Assembler::monitorexit(LIR_Opr obj_opr, LIR_Opr lock_opr, Register new_hdr, int monitor_no, Register exception) {
374 if (exception->is_valid()) {
375 // preserve exception
376 // note: the monitor_exit runtime call is a leaf routine
377 // and cannot block => no GC can happen
378 // The slow case (MonitorAccessStub) uses the first two stack slots
379 // ([esp+0] and [esp+4]), therefore we store the exception at [esp+8]
380 __ movptr (Address(rsp, 2*wordSize), exception);
381 }
383 Register obj_reg = obj_opr->as_register();
384 Register lock_reg = lock_opr->as_register();
386 // setup registers (lock_reg must be rax, for lock_object)
387 assert(obj_reg != SYNC_header && lock_reg != SYNC_header, "rax, must be available here");
388 Register hdr = lock_reg;
389 assert(new_hdr == SYNC_header, "wrong register");
390 lock_reg = new_hdr;
391 // compute pointer to BasicLock
392 Address lock_addr = frame_map()->address_for_monitor_lock(monitor_no);
393 __ lea(lock_reg, lock_addr);
394 // unlock object
395 MonitorAccessStub* slow_case = new MonitorExitStub(lock_opr, true, monitor_no);
396 // _slow_case_stubs->append(slow_case);
397 // temporary fix: must be created after exceptionhandler, therefore as call stub
398 _slow_case_stubs->append(slow_case);
399 if (UseFastLocking) {
400 // try inlined fast unlocking first, revert to slow locking if it fails
401 // note: lock_reg points to the displaced header since the displaced header offset is 0!
402 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
403 __ unlock_object(hdr, obj_reg, lock_reg, *slow_case->entry());
404 } else {
405 // always do slow unlocking
406 // note: the slow unlocking code could be inlined here, however if we use
407 // slow unlocking, speed doesn't matter anyway and this solution is
408 // simpler and requires less duplicated code - additionally, the
409 // slow unlocking code is the same in either case which simplifies
410 // debugging
411 __ jmp(*slow_case->entry());
412 }
413 // done
414 __ bind(*slow_case->continuation());
416 if (exception->is_valid()) {
417 // restore exception
418 __ movptr (exception, Address(rsp, 2 * wordSize));
419 }
420 }
422 // This specifies the rsp decrement needed to build the frame
423 int LIR_Assembler::initial_frame_size_in_bytes() {
424 // if rounding, must let FrameMap know!
426 // The frame_map records size in slots (32bit word)
428 // subtract two words to account for return address and link
429 return (frame_map()->framesize() - (2*VMRegImpl::slots_per_word)) * VMRegImpl::stack_slot_size;
430 }
433 int LIR_Assembler::emit_exception_handler() {
434 // if the last instruction is a call (typically to do a throw which
435 // is coming at the end after block reordering) the return address
436 // must still point into the code area in order to avoid assertion
437 // failures when searching for the corresponding bci => add a nop
438 // (was bug 5/14/1999 - gri)
439 __ nop();
441 // generate code for exception handler
442 address handler_base = __ start_a_stub(exception_handler_size);
443 if (handler_base == NULL) {
444 // not enough space left for the handler
445 bailout("exception handler overflow");
446 return -1;
447 }
449 int offset = code_offset();
451 // the exception oop and pc are in rax, and rdx
452 // no other registers need to be preserved, so invalidate them
453 __ invalidate_registers(false, true, true, false, true, true);
455 // check that there is really an exception
456 __ verify_not_null_oop(rax);
458 // search an exception handler (rax: exception oop, rdx: throwing pc)
459 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::handle_exception_nofpu_id)));
461 __ stop("should not reach here");
463 assert(code_offset() - offset <= exception_handler_size, "overflow");
464 __ end_a_stub();
466 return offset;
467 }
470 // Emit the code to remove the frame from the stack in the exception
471 // unwind path.
472 int LIR_Assembler::emit_unwind_handler() {
473 #ifndef PRODUCT
474 if (CommentedAssembly) {
475 _masm->block_comment("Unwind handler");
476 }
477 #endif
479 int offset = code_offset();
481 // Fetch the exception from TLS and clear out exception related thread state
482 __ get_thread(rsi);
483 __ movptr(rax, Address(rsi, JavaThread::exception_oop_offset()));
484 __ movptr(Address(rsi, JavaThread::exception_oop_offset()), (int32_t)NULL_WORD);
485 __ movptr(Address(rsi, JavaThread::exception_pc_offset()), (int32_t)NULL_WORD);
487 __ bind(_unwind_handler_entry);
488 __ verify_not_null_oop(rax);
489 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
490 __ mov(rsi, rax); // Preserve the exception
491 }
493 // Preform needed unlocking
494 MonitorExitStub* stub = NULL;
495 if (method()->is_synchronized()) {
496 monitor_address(0, FrameMap::rax_opr);
497 stub = new MonitorExitStub(FrameMap::rax_opr, true, 0);
498 __ unlock_object(rdi, rbx, rax, *stub->entry());
499 __ bind(*stub->continuation());
500 }
502 if (compilation()->env()->dtrace_method_probes()) {
503 __ get_thread(rax);
504 __ movptr(Address(rsp, 0), rax);
505 __ movoop(Address(rsp, sizeof(void*)), method()->constant_encoding());
506 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit)));
507 }
509 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
510 __ mov(rax, rsi); // Restore the exception
511 }
513 // remove the activation and dispatch to the unwind handler
514 __ remove_frame(initial_frame_size_in_bytes());
515 __ jump(RuntimeAddress(Runtime1::entry_for(Runtime1::unwind_exception_id)));
517 // Emit the slow path assembly
518 if (stub != NULL) {
519 stub->emit_code(this);
520 }
522 return offset;
523 }
526 int LIR_Assembler::emit_deopt_handler() {
527 // if the last instruction is a call (typically to do a throw which
528 // is coming at the end after block reordering) the return address
529 // must still point into the code area in order to avoid assertion
530 // failures when searching for the corresponding bci => add a nop
531 // (was bug 5/14/1999 - gri)
532 __ nop();
534 // generate code for exception handler
535 address handler_base = __ start_a_stub(deopt_handler_size);
536 if (handler_base == NULL) {
537 // not enough space left for the handler
538 bailout("deopt handler overflow");
539 return -1;
540 }
542 int offset = code_offset();
543 InternalAddress here(__ pc());
545 __ pushptr(here.addr());
546 __ jump(RuntimeAddress(SharedRuntime::deopt_blob()->unpack()));
548 assert(code_offset() - offset <= deopt_handler_size, "overflow");
549 __ end_a_stub();
551 return offset;
552 }
555 // This is the fast version of java.lang.String.compare; it has not
556 // OSR-entry and therefore, we generate a slow version for OSR's
557 void LIR_Assembler::emit_string_compare(LIR_Opr arg0, LIR_Opr arg1, LIR_Opr dst, CodeEmitInfo* info) {
558 __ movptr (rbx, rcx); // receiver is in rcx
559 __ movptr (rax, arg1->as_register());
561 // Get addresses of first characters from both Strings
562 __ load_heap_oop(rsi, Address(rax, java_lang_String::value_offset_in_bytes()));
563 __ movptr (rcx, Address(rax, java_lang_String::offset_offset_in_bytes()));
564 __ lea (rsi, Address(rsi, rcx, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR)));
567 // rbx, may be NULL
568 add_debug_info_for_null_check_here(info);
569 __ load_heap_oop(rdi, Address(rbx, java_lang_String::value_offset_in_bytes()));
570 __ movptr (rcx, Address(rbx, java_lang_String::offset_offset_in_bytes()));
571 __ lea (rdi, Address(rdi, rcx, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR)));
573 // compute minimum length (in rax) and difference of lengths (on top of stack)
574 if (VM_Version::supports_cmov()) {
575 __ movl (rbx, Address(rbx, java_lang_String::count_offset_in_bytes()));
576 __ movl (rax, Address(rax, java_lang_String::count_offset_in_bytes()));
577 __ mov (rcx, rbx);
578 __ subptr (rbx, rax); // subtract lengths
579 __ push (rbx); // result
580 __ cmov (Assembler::lessEqual, rax, rcx);
581 } else {
582 Label L;
583 __ movl (rbx, Address(rbx, java_lang_String::count_offset_in_bytes()));
584 __ movl (rcx, Address(rax, java_lang_String::count_offset_in_bytes()));
585 __ mov (rax, rbx);
586 __ subptr (rbx, rcx);
587 __ push (rbx);
588 __ jcc (Assembler::lessEqual, L);
589 __ mov (rax, rcx);
590 __ bind (L);
591 }
592 // is minimum length 0?
593 Label noLoop, haveResult;
594 __ testptr (rax, rax);
595 __ jcc (Assembler::zero, noLoop);
597 // compare first characters
598 __ load_unsigned_short(rcx, Address(rdi, 0));
599 __ load_unsigned_short(rbx, Address(rsi, 0));
600 __ subl(rcx, rbx);
601 __ jcc(Assembler::notZero, haveResult);
602 // starting loop
603 __ decrement(rax); // we already tested index: skip one
604 __ jcc(Assembler::zero, noLoop);
606 // set rsi.edi to the end of the arrays (arrays have same length)
607 // negate the index
609 __ lea(rsi, Address(rsi, rax, Address::times_2, type2aelembytes(T_CHAR)));
610 __ lea(rdi, Address(rdi, rax, Address::times_2, type2aelembytes(T_CHAR)));
611 __ negptr(rax);
613 // compare the strings in a loop
615 Label loop;
616 __ align(wordSize);
617 __ bind(loop);
618 __ load_unsigned_short(rcx, Address(rdi, rax, Address::times_2, 0));
619 __ load_unsigned_short(rbx, Address(rsi, rax, Address::times_2, 0));
620 __ subl(rcx, rbx);
621 __ jcc(Assembler::notZero, haveResult);
622 __ increment(rax);
623 __ jcc(Assembler::notZero, loop);
625 // strings are equal up to min length
627 __ bind(noLoop);
628 __ pop(rax);
629 return_op(LIR_OprFact::illegalOpr);
631 __ bind(haveResult);
632 // leave instruction is going to discard the TOS value
633 __ mov (rax, rcx); // result of call is in rax,
634 }
637 void LIR_Assembler::return_op(LIR_Opr result) {
638 assert(result->is_illegal() || !result->is_single_cpu() || result->as_register() == rax, "word returns are in rax,");
639 if (!result->is_illegal() && result->is_float_kind() && !result->is_xmm_register()) {
640 assert(result->fpu() == 0, "result must already be on TOS");
641 }
643 // Pop the stack before the safepoint code
644 __ remove_frame(initial_frame_size_in_bytes());
646 bool result_is_oop = result->is_valid() ? result->is_oop() : false;
648 // Note: we do not need to round double result; float result has the right precision
649 // the poll sets the condition code, but no data registers
650 AddressLiteral polling_page(os::get_polling_page() + (SafepointPollOffset % os::vm_page_size()),
651 relocInfo::poll_return_type);
653 // NOTE: the requires that the polling page be reachable else the reloc
654 // goes to the movq that loads the address and not the faulting instruction
655 // which breaks the signal handler code
657 __ test32(rax, polling_page);
659 __ ret(0);
660 }
663 int LIR_Assembler::safepoint_poll(LIR_Opr tmp, CodeEmitInfo* info) {
664 AddressLiteral polling_page(os::get_polling_page() + (SafepointPollOffset % os::vm_page_size()),
665 relocInfo::poll_type);
667 if (info != NULL) {
668 add_debug_info_for_branch(info);
669 } else {
670 ShouldNotReachHere();
671 }
673 int offset = __ offset();
675 // NOTE: the requires that the polling page be reachable else the reloc
676 // goes to the movq that loads the address and not the faulting instruction
677 // which breaks the signal handler code
679 __ test32(rax, polling_page);
680 return offset;
681 }
684 void LIR_Assembler::move_regs(Register from_reg, Register to_reg) {
685 if (from_reg != to_reg) __ mov(to_reg, from_reg);
686 }
688 void LIR_Assembler::swap_reg(Register a, Register b) {
689 __ xchgptr(a, b);
690 }
693 void LIR_Assembler::const2reg(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) {
694 assert(src->is_constant(), "should not call otherwise");
695 assert(dest->is_register(), "should not call otherwise");
696 LIR_Const* c = src->as_constant_ptr();
698 switch (c->type()) {
699 case T_INT: {
700 assert(patch_code == lir_patch_none, "no patching handled here");
701 __ movl(dest->as_register(), c->as_jint());
702 break;
703 }
705 case T_ADDRESS: {
706 assert(patch_code == lir_patch_none, "no patching handled here");
707 __ movptr(dest->as_register(), c->as_jint());
708 break;
709 }
711 case T_LONG: {
712 assert(patch_code == lir_patch_none, "no patching handled here");
713 #ifdef _LP64
714 __ movptr(dest->as_register_lo(), (intptr_t)c->as_jlong());
715 #else
716 __ movptr(dest->as_register_lo(), c->as_jint_lo());
717 __ movptr(dest->as_register_hi(), c->as_jint_hi());
718 #endif // _LP64
719 break;
720 }
722 case T_OBJECT: {
723 if (patch_code != lir_patch_none) {
724 jobject2reg_with_patching(dest->as_register(), info);
725 } else {
726 __ movoop(dest->as_register(), c->as_jobject());
727 }
728 break;
729 }
731 case T_FLOAT: {
732 if (dest->is_single_xmm()) {
733 if (c->is_zero_float()) {
734 __ xorps(dest->as_xmm_float_reg(), dest->as_xmm_float_reg());
735 } else {
736 __ movflt(dest->as_xmm_float_reg(),
737 InternalAddress(float_constant(c->as_jfloat())));
738 }
739 } else {
740 assert(dest->is_single_fpu(), "must be");
741 assert(dest->fpu_regnr() == 0, "dest must be TOS");
742 if (c->is_zero_float()) {
743 __ fldz();
744 } else if (c->is_one_float()) {
745 __ fld1();
746 } else {
747 __ fld_s (InternalAddress(float_constant(c->as_jfloat())));
748 }
749 }
750 break;
751 }
753 case T_DOUBLE: {
754 if (dest->is_double_xmm()) {
755 if (c->is_zero_double()) {
756 __ xorpd(dest->as_xmm_double_reg(), dest->as_xmm_double_reg());
757 } else {
758 __ movdbl(dest->as_xmm_double_reg(),
759 InternalAddress(double_constant(c->as_jdouble())));
760 }
761 } else {
762 assert(dest->is_double_fpu(), "must be");
763 assert(dest->fpu_regnrLo() == 0, "dest must be TOS");
764 if (c->is_zero_double()) {
765 __ fldz();
766 } else if (c->is_one_double()) {
767 __ fld1();
768 } else {
769 __ fld_d (InternalAddress(double_constant(c->as_jdouble())));
770 }
771 }
772 break;
773 }
775 default:
776 ShouldNotReachHere();
777 }
778 }
780 void LIR_Assembler::const2stack(LIR_Opr src, LIR_Opr dest) {
781 assert(src->is_constant(), "should not call otherwise");
782 assert(dest->is_stack(), "should not call otherwise");
783 LIR_Const* c = src->as_constant_ptr();
785 switch (c->type()) {
786 case T_INT: // fall through
787 case T_FLOAT:
788 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits());
789 break;
791 case T_ADDRESS:
792 __ movptr(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits());
793 break;
795 case T_OBJECT:
796 __ movoop(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jobject());
797 break;
799 case T_LONG: // fall through
800 case T_DOUBLE:
801 #ifdef _LP64
802 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(),
803 lo_word_offset_in_bytes), (intptr_t)c->as_jlong_bits());
804 #else
805 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(),
806 lo_word_offset_in_bytes), c->as_jint_lo_bits());
807 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(),
808 hi_word_offset_in_bytes), c->as_jint_hi_bits());
809 #endif // _LP64
810 break;
812 default:
813 ShouldNotReachHere();
814 }
815 }
817 void LIR_Assembler::const2mem(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info, bool wide) {
818 assert(src->is_constant(), "should not call otherwise");
819 assert(dest->is_address(), "should not call otherwise");
820 LIR_Const* c = src->as_constant_ptr();
821 LIR_Address* addr = dest->as_address_ptr();
823 int null_check_here = code_offset();
824 switch (type) {
825 case T_INT: // fall through
826 case T_FLOAT:
827 __ movl(as_Address(addr), c->as_jint_bits());
828 break;
830 case T_ADDRESS:
831 __ movptr(as_Address(addr), c->as_jint_bits());
832 break;
834 case T_OBJECT: // fall through
835 case T_ARRAY:
836 if (c->as_jobject() == NULL) {
837 if (UseCompressedOops && !wide) {
838 __ movl(as_Address(addr), (int32_t)NULL_WORD);
839 } else {
840 __ movptr(as_Address(addr), NULL_WORD);
841 }
842 } else {
843 if (is_literal_address(addr)) {
844 ShouldNotReachHere();
845 __ movoop(as_Address(addr, noreg), c->as_jobject());
846 } else {
847 #ifdef _LP64
848 __ movoop(rscratch1, c->as_jobject());
849 if (UseCompressedOops && !wide) {
850 __ encode_heap_oop(rscratch1);
851 null_check_here = code_offset();
852 __ movl(as_Address_lo(addr), rscratch1);
853 } else {
854 null_check_here = code_offset();
855 __ movptr(as_Address_lo(addr), rscratch1);
856 }
857 #else
858 __ movoop(as_Address(addr), c->as_jobject());
859 #endif
860 }
861 }
862 break;
864 case T_LONG: // fall through
865 case T_DOUBLE:
866 #ifdef _LP64
867 if (is_literal_address(addr)) {
868 ShouldNotReachHere();
869 __ movptr(as_Address(addr, r15_thread), (intptr_t)c->as_jlong_bits());
870 } else {
871 __ movptr(r10, (intptr_t)c->as_jlong_bits());
872 null_check_here = code_offset();
873 __ movptr(as_Address_lo(addr), r10);
874 }
875 #else
876 // Always reachable in 32bit so this doesn't produce useless move literal
877 __ movptr(as_Address_hi(addr), c->as_jint_hi_bits());
878 __ movptr(as_Address_lo(addr), c->as_jint_lo_bits());
879 #endif // _LP64
880 break;
882 case T_BOOLEAN: // fall through
883 case T_BYTE:
884 __ movb(as_Address(addr), c->as_jint() & 0xFF);
885 break;
887 case T_CHAR: // fall through
888 case T_SHORT:
889 __ movw(as_Address(addr), c->as_jint() & 0xFFFF);
890 break;
892 default:
893 ShouldNotReachHere();
894 };
896 if (info != NULL) {
897 add_debug_info_for_null_check(null_check_here, info);
898 }
899 }
902 void LIR_Assembler::reg2reg(LIR_Opr src, LIR_Opr dest) {
903 assert(src->is_register(), "should not call otherwise");
904 assert(dest->is_register(), "should not call otherwise");
906 // move between cpu-registers
907 if (dest->is_single_cpu()) {
908 #ifdef _LP64
909 if (src->type() == T_LONG) {
910 // Can do LONG -> OBJECT
911 move_regs(src->as_register_lo(), dest->as_register());
912 return;
913 }
914 #endif
915 assert(src->is_single_cpu(), "must match");
916 if (src->type() == T_OBJECT) {
917 __ verify_oop(src->as_register());
918 }
919 move_regs(src->as_register(), dest->as_register());
921 } else if (dest->is_double_cpu()) {
922 #ifdef _LP64
923 if (src->type() == T_OBJECT || src->type() == T_ARRAY) {
924 // Surprising to me but we can see move of a long to t_object
925 __ verify_oop(src->as_register());
926 move_regs(src->as_register(), dest->as_register_lo());
927 return;
928 }
929 #endif
930 assert(src->is_double_cpu(), "must match");
931 Register f_lo = src->as_register_lo();
932 Register f_hi = src->as_register_hi();
933 Register t_lo = dest->as_register_lo();
934 Register t_hi = dest->as_register_hi();
935 #ifdef _LP64
936 assert(f_hi == f_lo, "must be same");
937 assert(t_hi == t_lo, "must be same");
938 move_regs(f_lo, t_lo);
939 #else
940 assert(f_lo != f_hi && t_lo != t_hi, "invalid register allocation");
943 if (f_lo == t_hi && f_hi == t_lo) {
944 swap_reg(f_lo, f_hi);
945 } else if (f_hi == t_lo) {
946 assert(f_lo != t_hi, "overwriting register");
947 move_regs(f_hi, t_hi);
948 move_regs(f_lo, t_lo);
949 } else {
950 assert(f_hi != t_lo, "overwriting register");
951 move_regs(f_lo, t_lo);
952 move_regs(f_hi, t_hi);
953 }
954 #endif // LP64
956 // special moves from fpu-register to xmm-register
957 // necessary for method results
958 } else if (src->is_single_xmm() && !dest->is_single_xmm()) {
959 __ movflt(Address(rsp, 0), src->as_xmm_float_reg());
960 __ fld_s(Address(rsp, 0));
961 } else if (src->is_double_xmm() && !dest->is_double_xmm()) {
962 __ movdbl(Address(rsp, 0), src->as_xmm_double_reg());
963 __ fld_d(Address(rsp, 0));
964 } else if (dest->is_single_xmm() && !src->is_single_xmm()) {
965 __ fstp_s(Address(rsp, 0));
966 __ movflt(dest->as_xmm_float_reg(), Address(rsp, 0));
967 } else if (dest->is_double_xmm() && !src->is_double_xmm()) {
968 __ fstp_d(Address(rsp, 0));
969 __ movdbl(dest->as_xmm_double_reg(), Address(rsp, 0));
971 // move between xmm-registers
972 } else if (dest->is_single_xmm()) {
973 assert(src->is_single_xmm(), "must match");
974 __ movflt(dest->as_xmm_float_reg(), src->as_xmm_float_reg());
975 } else if (dest->is_double_xmm()) {
976 assert(src->is_double_xmm(), "must match");
977 __ movdbl(dest->as_xmm_double_reg(), src->as_xmm_double_reg());
979 // move between fpu-registers (no instruction necessary because of fpu-stack)
980 } else if (dest->is_single_fpu() || dest->is_double_fpu()) {
981 assert(src->is_single_fpu() || src->is_double_fpu(), "must match");
982 assert(src->fpu() == dest->fpu(), "currently should be nothing to do");
983 } else {
984 ShouldNotReachHere();
985 }
986 }
988 void LIR_Assembler::reg2stack(LIR_Opr src, LIR_Opr dest, BasicType type, bool pop_fpu_stack) {
989 assert(src->is_register(), "should not call otherwise");
990 assert(dest->is_stack(), "should not call otherwise");
992 if (src->is_single_cpu()) {
993 Address dst = frame_map()->address_for_slot(dest->single_stack_ix());
994 if (type == T_OBJECT || type == T_ARRAY) {
995 __ verify_oop(src->as_register());
996 __ movptr (dst, src->as_register());
997 } else {
998 __ movl (dst, src->as_register());
999 }
1001 } else if (src->is_double_cpu()) {
1002 Address dstLO = frame_map()->address_for_slot(dest->double_stack_ix(), lo_word_offset_in_bytes);
1003 Address dstHI = frame_map()->address_for_slot(dest->double_stack_ix(), hi_word_offset_in_bytes);
1004 __ movptr (dstLO, src->as_register_lo());
1005 NOT_LP64(__ movptr (dstHI, src->as_register_hi()));
1007 } else if (src->is_single_xmm()) {
1008 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix());
1009 __ movflt(dst_addr, src->as_xmm_float_reg());
1011 } else if (src->is_double_xmm()) {
1012 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix());
1013 __ movdbl(dst_addr, src->as_xmm_double_reg());
1015 } else if (src->is_single_fpu()) {
1016 assert(src->fpu_regnr() == 0, "argument must be on TOS");
1017 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix());
1018 if (pop_fpu_stack) __ fstp_s (dst_addr);
1019 else __ fst_s (dst_addr);
1021 } else if (src->is_double_fpu()) {
1022 assert(src->fpu_regnrLo() == 0, "argument must be on TOS");
1023 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix());
1024 if (pop_fpu_stack) __ fstp_d (dst_addr);
1025 else __ fst_d (dst_addr);
1027 } else {
1028 ShouldNotReachHere();
1029 }
1030 }
1033 void LIR_Assembler::reg2mem(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool pop_fpu_stack, bool wide, bool /* unaligned */) {
1034 LIR_Address* to_addr = dest->as_address_ptr();
1035 PatchingStub* patch = NULL;
1036 Register compressed_src = rscratch1;
1038 if (type == T_ARRAY || type == T_OBJECT) {
1039 __ verify_oop(src->as_register());
1040 #ifdef _LP64
1041 if (UseCompressedOops && !wide) {
1042 __ movptr(compressed_src, src->as_register());
1043 __ encode_heap_oop(compressed_src);
1044 }
1045 #endif
1046 }
1048 if (patch_code != lir_patch_none) {
1049 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1050 Address toa = as_Address(to_addr);
1051 assert(toa.disp() != 0, "must have");
1052 }
1054 int null_check_here = code_offset();
1055 switch (type) {
1056 case T_FLOAT: {
1057 if (src->is_single_xmm()) {
1058 __ movflt(as_Address(to_addr), src->as_xmm_float_reg());
1059 } else {
1060 assert(src->is_single_fpu(), "must be");
1061 assert(src->fpu_regnr() == 0, "argument must be on TOS");
1062 if (pop_fpu_stack) __ fstp_s(as_Address(to_addr));
1063 else __ fst_s (as_Address(to_addr));
1064 }
1065 break;
1066 }
1068 case T_DOUBLE: {
1069 if (src->is_double_xmm()) {
1070 __ movdbl(as_Address(to_addr), src->as_xmm_double_reg());
1071 } else {
1072 assert(src->is_double_fpu(), "must be");
1073 assert(src->fpu_regnrLo() == 0, "argument must be on TOS");
1074 if (pop_fpu_stack) __ fstp_d(as_Address(to_addr));
1075 else __ fst_d (as_Address(to_addr));
1076 }
1077 break;
1078 }
1080 case T_ARRAY: // fall through
1081 case T_OBJECT: // fall through
1082 if (UseCompressedOops && !wide) {
1083 __ movl(as_Address(to_addr), compressed_src);
1084 } else {
1085 __ movptr(as_Address(to_addr), src->as_register());
1086 }
1087 break;
1088 case T_ADDRESS:
1089 __ movptr(as_Address(to_addr), src->as_register());
1090 break;
1091 case T_INT:
1092 __ movl(as_Address(to_addr), src->as_register());
1093 break;
1095 case T_LONG: {
1096 Register from_lo = src->as_register_lo();
1097 Register from_hi = src->as_register_hi();
1098 #ifdef _LP64
1099 __ movptr(as_Address_lo(to_addr), from_lo);
1100 #else
1101 Register base = to_addr->base()->as_register();
1102 Register index = noreg;
1103 if (to_addr->index()->is_register()) {
1104 index = to_addr->index()->as_register();
1105 }
1106 if (base == from_lo || index == from_lo) {
1107 assert(base != from_hi, "can't be");
1108 assert(index == noreg || (index != base && index != from_hi), "can't handle this");
1109 __ movl(as_Address_hi(to_addr), from_hi);
1110 if (patch != NULL) {
1111 patching_epilog(patch, lir_patch_high, base, info);
1112 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1113 patch_code = lir_patch_low;
1114 }
1115 __ movl(as_Address_lo(to_addr), from_lo);
1116 } else {
1117 assert(index == noreg || (index != base && index != from_lo), "can't handle this");
1118 __ movl(as_Address_lo(to_addr), from_lo);
1119 if (patch != NULL) {
1120 patching_epilog(patch, lir_patch_low, base, info);
1121 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1122 patch_code = lir_patch_high;
1123 }
1124 __ movl(as_Address_hi(to_addr), from_hi);
1125 }
1126 #endif // _LP64
1127 break;
1128 }
1130 case T_BYTE: // fall through
1131 case T_BOOLEAN: {
1132 Register src_reg = src->as_register();
1133 Address dst_addr = as_Address(to_addr);
1134 assert(VM_Version::is_P6() || src_reg->has_byte_register(), "must use byte registers if not P6");
1135 __ movb(dst_addr, src_reg);
1136 break;
1137 }
1139 case T_CHAR: // fall through
1140 case T_SHORT:
1141 __ movw(as_Address(to_addr), src->as_register());
1142 break;
1144 default:
1145 ShouldNotReachHere();
1146 }
1147 if (info != NULL) {
1148 add_debug_info_for_null_check(null_check_here, info);
1149 }
1151 if (patch_code != lir_patch_none) {
1152 patching_epilog(patch, patch_code, to_addr->base()->as_register(), info);
1153 }
1154 }
1157 void LIR_Assembler::stack2reg(LIR_Opr src, LIR_Opr dest, BasicType type) {
1158 assert(src->is_stack(), "should not call otherwise");
1159 assert(dest->is_register(), "should not call otherwise");
1161 if (dest->is_single_cpu()) {
1162 if (type == T_ARRAY || type == T_OBJECT) {
1163 __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()));
1164 __ verify_oop(dest->as_register());
1165 } else {
1166 __ movl(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()));
1167 }
1169 } else if (dest->is_double_cpu()) {
1170 Address src_addr_LO = frame_map()->address_for_slot(src->double_stack_ix(), lo_word_offset_in_bytes);
1171 Address src_addr_HI = frame_map()->address_for_slot(src->double_stack_ix(), hi_word_offset_in_bytes);
1172 __ movptr(dest->as_register_lo(), src_addr_LO);
1173 NOT_LP64(__ movptr(dest->as_register_hi(), src_addr_HI));
1175 } else if (dest->is_single_xmm()) {
1176 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix());
1177 __ movflt(dest->as_xmm_float_reg(), src_addr);
1179 } else if (dest->is_double_xmm()) {
1180 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix());
1181 __ movdbl(dest->as_xmm_double_reg(), src_addr);
1183 } else if (dest->is_single_fpu()) {
1184 assert(dest->fpu_regnr() == 0, "dest must be TOS");
1185 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix());
1186 __ fld_s(src_addr);
1188 } else if (dest->is_double_fpu()) {
1189 assert(dest->fpu_regnrLo() == 0, "dest must be TOS");
1190 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix());
1191 __ fld_d(src_addr);
1193 } else {
1194 ShouldNotReachHere();
1195 }
1196 }
1199 void LIR_Assembler::stack2stack(LIR_Opr src, LIR_Opr dest, BasicType type) {
1200 if (src->is_single_stack()) {
1201 if (type == T_OBJECT || type == T_ARRAY) {
1202 __ pushptr(frame_map()->address_for_slot(src ->single_stack_ix()));
1203 __ popptr (frame_map()->address_for_slot(dest->single_stack_ix()));
1204 } else {
1205 #ifndef _LP64
1206 __ pushl(frame_map()->address_for_slot(src ->single_stack_ix()));
1207 __ popl (frame_map()->address_for_slot(dest->single_stack_ix()));
1208 #else
1209 //no pushl on 64bits
1210 __ movl(rscratch1, frame_map()->address_for_slot(src ->single_stack_ix()));
1211 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), rscratch1);
1212 #endif
1213 }
1215 } else if (src->is_double_stack()) {
1216 #ifdef _LP64
1217 __ pushptr(frame_map()->address_for_slot(src ->double_stack_ix()));
1218 __ popptr (frame_map()->address_for_slot(dest->double_stack_ix()));
1219 #else
1220 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 0));
1221 // push and pop the part at src + wordSize, adding wordSize for the previous push
1222 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 2 * wordSize));
1223 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 2 * wordSize));
1224 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 0));
1225 #endif // _LP64
1227 } else {
1228 ShouldNotReachHere();
1229 }
1230 }
1233 void LIR_Assembler::mem2reg(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool wide, bool /* unaligned */) {
1234 assert(src->is_address(), "should not call otherwise");
1235 assert(dest->is_register(), "should not call otherwise");
1237 LIR_Address* addr = src->as_address_ptr();
1238 Address from_addr = as_Address(addr);
1240 switch (type) {
1241 case T_BOOLEAN: // fall through
1242 case T_BYTE: // fall through
1243 case T_CHAR: // fall through
1244 case T_SHORT:
1245 if (!VM_Version::is_P6() && !from_addr.uses(dest->as_register())) {
1246 // on pre P6 processors we may get partial register stalls
1247 // so blow away the value of to_rinfo before loading a
1248 // partial word into it. Do it here so that it precedes
1249 // the potential patch point below.
1250 __ xorptr(dest->as_register(), dest->as_register());
1251 }
1252 break;
1253 }
1255 PatchingStub* patch = NULL;
1256 if (patch_code != lir_patch_none) {
1257 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1258 assert(from_addr.disp() != 0, "must have");
1259 }
1260 if (info != NULL) {
1261 add_debug_info_for_null_check_here(info);
1262 }
1264 switch (type) {
1265 case T_FLOAT: {
1266 if (dest->is_single_xmm()) {
1267 __ movflt(dest->as_xmm_float_reg(), from_addr);
1268 } else {
1269 assert(dest->is_single_fpu(), "must be");
1270 assert(dest->fpu_regnr() == 0, "dest must be TOS");
1271 __ fld_s(from_addr);
1272 }
1273 break;
1274 }
1276 case T_DOUBLE: {
1277 if (dest->is_double_xmm()) {
1278 __ movdbl(dest->as_xmm_double_reg(), from_addr);
1279 } else {
1280 assert(dest->is_double_fpu(), "must be");
1281 assert(dest->fpu_regnrLo() == 0, "dest must be TOS");
1282 __ fld_d(from_addr);
1283 }
1284 break;
1285 }
1287 case T_OBJECT: // fall through
1288 case T_ARRAY: // fall through
1289 if (UseCompressedOops && !wide) {
1290 __ movl(dest->as_register(), from_addr);
1291 } else {
1292 __ movptr(dest->as_register(), from_addr);
1293 }
1294 break;
1296 case T_ADDRESS:
1297 __ movptr(dest->as_register(), from_addr);
1298 break;
1299 case T_INT:
1300 __ movl(dest->as_register(), from_addr);
1301 break;
1303 case T_LONG: {
1304 Register to_lo = dest->as_register_lo();
1305 Register to_hi = dest->as_register_hi();
1306 #ifdef _LP64
1307 __ movptr(to_lo, as_Address_lo(addr));
1308 #else
1309 Register base = addr->base()->as_register();
1310 Register index = noreg;
1311 if (addr->index()->is_register()) {
1312 index = addr->index()->as_register();
1313 }
1314 if ((base == to_lo && index == to_hi) ||
1315 (base == to_hi && index == to_lo)) {
1316 // addresses with 2 registers are only formed as a result of
1317 // array access so this code will never have to deal with
1318 // patches or null checks.
1319 assert(info == NULL && patch == NULL, "must be");
1320 __ lea(to_hi, as_Address(addr));
1321 __ movl(to_lo, Address(to_hi, 0));
1322 __ movl(to_hi, Address(to_hi, BytesPerWord));
1323 } else if (base == to_lo || index == to_lo) {
1324 assert(base != to_hi, "can't be");
1325 assert(index == noreg || (index != base && index != to_hi), "can't handle this");
1326 __ movl(to_hi, as_Address_hi(addr));
1327 if (patch != NULL) {
1328 patching_epilog(patch, lir_patch_high, base, info);
1329 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1330 patch_code = lir_patch_low;
1331 }
1332 __ movl(to_lo, as_Address_lo(addr));
1333 } else {
1334 assert(index == noreg || (index != base && index != to_lo), "can't handle this");
1335 __ movl(to_lo, as_Address_lo(addr));
1336 if (patch != NULL) {
1337 patching_epilog(patch, lir_patch_low, base, info);
1338 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1339 patch_code = lir_patch_high;
1340 }
1341 __ movl(to_hi, as_Address_hi(addr));
1342 }
1343 #endif // _LP64
1344 break;
1345 }
1347 case T_BOOLEAN: // fall through
1348 case T_BYTE: {
1349 Register dest_reg = dest->as_register();
1350 assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6");
1351 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) {
1352 __ movsbl(dest_reg, from_addr);
1353 } else {
1354 __ movb(dest_reg, from_addr);
1355 __ shll(dest_reg, 24);
1356 __ sarl(dest_reg, 24);
1357 }
1358 break;
1359 }
1361 case T_CHAR: {
1362 Register dest_reg = dest->as_register();
1363 assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6");
1364 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) {
1365 __ movzwl(dest_reg, from_addr);
1366 } else {
1367 __ movw(dest_reg, from_addr);
1368 }
1369 break;
1370 }
1372 case T_SHORT: {
1373 Register dest_reg = dest->as_register();
1374 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) {
1375 __ movswl(dest_reg, from_addr);
1376 } else {
1377 __ movw(dest_reg, from_addr);
1378 __ shll(dest_reg, 16);
1379 __ sarl(dest_reg, 16);
1380 }
1381 break;
1382 }
1384 default:
1385 ShouldNotReachHere();
1386 }
1388 if (patch != NULL) {
1389 patching_epilog(patch, patch_code, addr->base()->as_register(), info);
1390 }
1392 if (type == T_ARRAY || type == T_OBJECT) {
1393 #ifdef _LP64
1394 if (UseCompressedOops && !wide) {
1395 __ decode_heap_oop(dest->as_register());
1396 }
1397 #endif
1398 __ verify_oop(dest->as_register());
1399 }
1400 }
1403 void LIR_Assembler::prefetchr(LIR_Opr src) {
1404 LIR_Address* addr = src->as_address_ptr();
1405 Address from_addr = as_Address(addr);
1407 if (VM_Version::supports_sse()) {
1408 switch (ReadPrefetchInstr) {
1409 case 0:
1410 __ prefetchnta(from_addr); break;
1411 case 1:
1412 __ prefetcht0(from_addr); break;
1413 case 2:
1414 __ prefetcht2(from_addr); break;
1415 default:
1416 ShouldNotReachHere(); break;
1417 }
1418 } else if (VM_Version::supports_3dnow()) {
1419 __ prefetchr(from_addr);
1420 }
1421 }
1424 void LIR_Assembler::prefetchw(LIR_Opr src) {
1425 LIR_Address* addr = src->as_address_ptr();
1426 Address from_addr = as_Address(addr);
1428 if (VM_Version::supports_sse()) {
1429 switch (AllocatePrefetchInstr) {
1430 case 0:
1431 __ prefetchnta(from_addr); break;
1432 case 1:
1433 __ prefetcht0(from_addr); break;
1434 case 2:
1435 __ prefetcht2(from_addr); break;
1436 case 3:
1437 __ prefetchw(from_addr); break;
1438 default:
1439 ShouldNotReachHere(); break;
1440 }
1441 } else if (VM_Version::supports_3dnow()) {
1442 __ prefetchw(from_addr);
1443 }
1444 }
1447 NEEDS_CLEANUP; // This could be static?
1448 Address::ScaleFactor LIR_Assembler::array_element_size(BasicType type) const {
1449 int elem_size = type2aelembytes(type);
1450 switch (elem_size) {
1451 case 1: return Address::times_1;
1452 case 2: return Address::times_2;
1453 case 4: return Address::times_4;
1454 case 8: return Address::times_8;
1455 }
1456 ShouldNotReachHere();
1457 return Address::no_scale;
1458 }
1461 void LIR_Assembler::emit_op3(LIR_Op3* op) {
1462 switch (op->code()) {
1463 case lir_idiv:
1464 case lir_irem:
1465 arithmetic_idiv(op->code(),
1466 op->in_opr1(),
1467 op->in_opr2(),
1468 op->in_opr3(),
1469 op->result_opr(),
1470 op->info());
1471 break;
1472 default: ShouldNotReachHere(); break;
1473 }
1474 }
1476 void LIR_Assembler::emit_opBranch(LIR_OpBranch* op) {
1477 #ifdef ASSERT
1478 assert(op->block() == NULL || op->block()->label() == op->label(), "wrong label");
1479 if (op->block() != NULL) _branch_target_blocks.append(op->block());
1480 if (op->ublock() != NULL) _branch_target_blocks.append(op->ublock());
1481 #endif
1483 if (op->cond() == lir_cond_always) {
1484 if (op->info() != NULL) add_debug_info_for_branch(op->info());
1485 __ jmp (*(op->label()));
1486 } else {
1487 Assembler::Condition acond = Assembler::zero;
1488 if (op->code() == lir_cond_float_branch) {
1489 assert(op->ublock() != NULL, "must have unordered successor");
1490 __ jcc(Assembler::parity, *(op->ublock()->label()));
1491 switch(op->cond()) {
1492 case lir_cond_equal: acond = Assembler::equal; break;
1493 case lir_cond_notEqual: acond = Assembler::notEqual; break;
1494 case lir_cond_less: acond = Assembler::below; break;
1495 case lir_cond_lessEqual: acond = Assembler::belowEqual; break;
1496 case lir_cond_greaterEqual: acond = Assembler::aboveEqual; break;
1497 case lir_cond_greater: acond = Assembler::above; break;
1498 default: ShouldNotReachHere();
1499 }
1500 } else {
1501 switch (op->cond()) {
1502 case lir_cond_equal: acond = Assembler::equal; break;
1503 case lir_cond_notEqual: acond = Assembler::notEqual; break;
1504 case lir_cond_less: acond = Assembler::less; break;
1505 case lir_cond_lessEqual: acond = Assembler::lessEqual; break;
1506 case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break;
1507 case lir_cond_greater: acond = Assembler::greater; break;
1508 case lir_cond_belowEqual: acond = Assembler::belowEqual; break;
1509 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; break;
1510 default: ShouldNotReachHere();
1511 }
1512 }
1513 __ jcc(acond,*(op->label()));
1514 }
1515 }
1517 void LIR_Assembler::emit_opConvert(LIR_OpConvert* op) {
1518 LIR_Opr src = op->in_opr();
1519 LIR_Opr dest = op->result_opr();
1521 switch (op->bytecode()) {
1522 case Bytecodes::_i2l:
1523 #ifdef _LP64
1524 __ movl2ptr(dest->as_register_lo(), src->as_register());
1525 #else
1526 move_regs(src->as_register(), dest->as_register_lo());
1527 move_regs(src->as_register(), dest->as_register_hi());
1528 __ sarl(dest->as_register_hi(), 31);
1529 #endif // LP64
1530 break;
1532 case Bytecodes::_l2i:
1533 move_regs(src->as_register_lo(), dest->as_register());
1534 break;
1536 case Bytecodes::_i2b:
1537 move_regs(src->as_register(), dest->as_register());
1538 __ sign_extend_byte(dest->as_register());
1539 break;
1541 case Bytecodes::_i2c:
1542 move_regs(src->as_register(), dest->as_register());
1543 __ andl(dest->as_register(), 0xFFFF);
1544 break;
1546 case Bytecodes::_i2s:
1547 move_regs(src->as_register(), dest->as_register());
1548 __ sign_extend_short(dest->as_register());
1549 break;
1552 case Bytecodes::_f2d:
1553 case Bytecodes::_d2f:
1554 if (dest->is_single_xmm()) {
1555 __ cvtsd2ss(dest->as_xmm_float_reg(), src->as_xmm_double_reg());
1556 } else if (dest->is_double_xmm()) {
1557 __ cvtss2sd(dest->as_xmm_double_reg(), src->as_xmm_float_reg());
1558 } else {
1559 assert(src->fpu() == dest->fpu(), "register must be equal");
1560 // do nothing (float result is rounded later through spilling)
1561 }
1562 break;
1564 case Bytecodes::_i2f:
1565 case Bytecodes::_i2d:
1566 if (dest->is_single_xmm()) {
1567 __ cvtsi2ssl(dest->as_xmm_float_reg(), src->as_register());
1568 } else if (dest->is_double_xmm()) {
1569 __ cvtsi2sdl(dest->as_xmm_double_reg(), src->as_register());
1570 } else {
1571 assert(dest->fpu() == 0, "result must be on TOS");
1572 __ movl(Address(rsp, 0), src->as_register());
1573 __ fild_s(Address(rsp, 0));
1574 }
1575 break;
1577 case Bytecodes::_f2i:
1578 case Bytecodes::_d2i:
1579 if (src->is_single_xmm()) {
1580 __ cvttss2sil(dest->as_register(), src->as_xmm_float_reg());
1581 } else if (src->is_double_xmm()) {
1582 __ cvttsd2sil(dest->as_register(), src->as_xmm_double_reg());
1583 } else {
1584 assert(src->fpu() == 0, "input must be on TOS");
1585 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_trunc()));
1586 __ fist_s(Address(rsp, 0));
1587 __ movl(dest->as_register(), Address(rsp, 0));
1588 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
1589 }
1591 // IA32 conversion instructions do not match JLS for overflow, underflow and NaN -> fixup in stub
1592 assert(op->stub() != NULL, "stub required");
1593 __ cmpl(dest->as_register(), 0x80000000);
1594 __ jcc(Assembler::equal, *op->stub()->entry());
1595 __ bind(*op->stub()->continuation());
1596 break;
1598 case Bytecodes::_l2f:
1599 case Bytecodes::_l2d:
1600 assert(!dest->is_xmm_register(), "result in xmm register not supported (no SSE instruction present)");
1601 assert(dest->fpu() == 0, "result must be on TOS");
1603 __ movptr(Address(rsp, 0), src->as_register_lo());
1604 NOT_LP64(__ movl(Address(rsp, BytesPerWord), src->as_register_hi()));
1605 __ fild_d(Address(rsp, 0));
1606 // float result is rounded later through spilling
1607 break;
1609 case Bytecodes::_f2l:
1610 case Bytecodes::_d2l:
1611 assert(!src->is_xmm_register(), "input in xmm register not supported (no SSE instruction present)");
1612 assert(src->fpu() == 0, "input must be on TOS");
1613 assert(dest == FrameMap::long0_opr, "runtime stub places result in these registers");
1615 // instruction sequence too long to inline it here
1616 {
1617 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::fpu2long_stub_id)));
1618 }
1619 break;
1621 default: ShouldNotReachHere();
1622 }
1623 }
1625 void LIR_Assembler::emit_alloc_obj(LIR_OpAllocObj* op) {
1626 if (op->init_check()) {
1627 __ cmpl(Address(op->klass()->as_register(),
1628 instanceKlass::init_state_offset_in_bytes() + sizeof(oopDesc)),
1629 instanceKlass::fully_initialized);
1630 add_debug_info_for_null_check_here(op->stub()->info());
1631 __ jcc(Assembler::notEqual, *op->stub()->entry());
1632 }
1633 __ allocate_object(op->obj()->as_register(),
1634 op->tmp1()->as_register(),
1635 op->tmp2()->as_register(),
1636 op->header_size(),
1637 op->object_size(),
1638 op->klass()->as_register(),
1639 *op->stub()->entry());
1640 __ bind(*op->stub()->continuation());
1641 }
1643 void LIR_Assembler::emit_alloc_array(LIR_OpAllocArray* op) {
1644 if (UseSlowPath ||
1645 (!UseFastNewObjectArray && (op->type() == T_OBJECT || op->type() == T_ARRAY)) ||
1646 (!UseFastNewTypeArray && (op->type() != T_OBJECT && op->type() != T_ARRAY))) {
1647 __ jmp(*op->stub()->entry());
1648 } else {
1649 Register len = op->len()->as_register();
1650 Register tmp1 = op->tmp1()->as_register();
1651 Register tmp2 = op->tmp2()->as_register();
1652 Register tmp3 = op->tmp3()->as_register();
1653 if (len == tmp1) {
1654 tmp1 = tmp3;
1655 } else if (len == tmp2) {
1656 tmp2 = tmp3;
1657 } else if (len == tmp3) {
1658 // everything is ok
1659 } else {
1660 __ mov(tmp3, len);
1661 }
1662 __ allocate_array(op->obj()->as_register(),
1663 len,
1664 tmp1,
1665 tmp2,
1666 arrayOopDesc::header_size(op->type()),
1667 array_element_size(op->type()),
1668 op->klass()->as_register(),
1669 *op->stub()->entry());
1670 }
1671 __ bind(*op->stub()->continuation());
1672 }
1674 void LIR_Assembler::type_profile_helper(Register mdo,
1675 ciMethodData *md, ciProfileData *data,
1676 Register recv, Label* update_done) {
1677 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) {
1678 Label next_test;
1679 // See if the receiver is receiver[n].
1680 __ cmpptr(recv, Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i))));
1681 __ jccb(Assembler::notEqual, next_test);
1682 Address data_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i)));
1683 __ addptr(data_addr, DataLayout::counter_increment);
1684 __ jmp(*update_done);
1685 __ bind(next_test);
1686 }
1688 // Didn't find receiver; find next empty slot and fill it in
1689 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) {
1690 Label next_test;
1691 Address recv_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i)));
1692 __ cmpptr(recv_addr, (intptr_t)NULL_WORD);
1693 __ jccb(Assembler::notEqual, next_test);
1694 __ movptr(recv_addr, recv);
1695 __ movptr(Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i))), DataLayout::counter_increment);
1696 __ jmp(*update_done);
1697 __ bind(next_test);
1698 }
1699 }
1701 void LIR_Assembler::emit_typecheck_helper(LIR_OpTypeCheck *op, Label* success, Label* failure, Label* obj_is_null) {
1702 // we always need a stub for the failure case.
1703 CodeStub* stub = op->stub();
1704 Register obj = op->object()->as_register();
1705 Register k_RInfo = op->tmp1()->as_register();
1706 Register klass_RInfo = op->tmp2()->as_register();
1707 Register dst = op->result_opr()->as_register();
1708 ciKlass* k = op->klass();
1709 Register Rtmp1 = noreg;
1711 // check if it needs to be profiled
1712 ciMethodData* md;
1713 ciProfileData* data;
1715 if (op->should_profile()) {
1716 ciMethod* method = op->profiled_method();
1717 assert(method != NULL, "Should have method");
1718 int bci = op->profiled_bci();
1719 md = method->method_data_or_null();
1720 assert(md != NULL, "Sanity");
1721 data = md->bci_to_data(bci);
1722 assert(data != NULL, "need data for type check");
1723 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check");
1724 }
1725 Label profile_cast_success, profile_cast_failure;
1726 Label *success_target = op->should_profile() ? &profile_cast_success : success;
1727 Label *failure_target = op->should_profile() ? &profile_cast_failure : failure;
1729 if (obj == k_RInfo) {
1730 k_RInfo = dst;
1731 } else if (obj == klass_RInfo) {
1732 klass_RInfo = dst;
1733 }
1734 if (k->is_loaded() && !UseCompressedOops) {
1735 select_different_registers(obj, dst, k_RInfo, klass_RInfo);
1736 } else {
1737 Rtmp1 = op->tmp3()->as_register();
1738 select_different_registers(obj, dst, k_RInfo, klass_RInfo, Rtmp1);
1739 }
1741 assert_different_registers(obj, k_RInfo, klass_RInfo);
1742 if (!k->is_loaded()) {
1743 jobject2reg_with_patching(k_RInfo, op->info_for_patch());
1744 } else {
1745 #ifdef _LP64
1746 __ movoop(k_RInfo, k->constant_encoding());
1747 #endif // _LP64
1748 }
1749 assert(obj != k_RInfo, "must be different");
1751 __ cmpptr(obj, (int32_t)NULL_WORD);
1752 if (op->should_profile()) {
1753 Label not_null;
1754 __ jccb(Assembler::notEqual, not_null);
1755 // Object is null; update MDO and exit
1756 Register mdo = klass_RInfo;
1757 __ movoop(mdo, md->constant_encoding());
1758 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::header_offset()));
1759 int header_bits = DataLayout::flag_mask_to_header_mask(BitData::null_seen_byte_constant());
1760 __ orl(data_addr, header_bits);
1761 __ jmp(*obj_is_null);
1762 __ bind(not_null);
1763 } else {
1764 __ jcc(Assembler::equal, *obj_is_null);
1765 }
1766 __ verify_oop(obj);
1768 if (op->fast_check()) {
1769 // get object class
1770 // not a safepoint as obj null check happens earlier
1771 #ifdef _LP64
1772 if (UseCompressedOops) {
1773 __ load_klass(Rtmp1, obj);
1774 __ cmpptr(k_RInfo, Rtmp1);
1775 } else {
1776 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes()));
1777 }
1778 #else
1779 if (k->is_loaded()) {
1780 __ cmpoop(Address(obj, oopDesc::klass_offset_in_bytes()), k->constant_encoding());
1781 } else {
1782 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes()));
1783 }
1784 #endif
1785 __ jcc(Assembler::notEqual, *failure_target);
1786 // successful cast, fall through to profile or jump
1787 } else {
1788 // get object class
1789 // not a safepoint as obj null check happens earlier
1790 __ load_klass(klass_RInfo, obj);
1791 if (k->is_loaded()) {
1792 // See if we get an immediate positive hit
1793 #ifdef _LP64
1794 __ cmpptr(k_RInfo, Address(klass_RInfo, k->super_check_offset()));
1795 #else
1796 __ cmpoop(Address(klass_RInfo, k->super_check_offset()), k->constant_encoding());
1797 #endif // _LP64
1798 if (sizeof(oopDesc) + Klass::secondary_super_cache_offset_in_bytes() != k->super_check_offset()) {
1799 __ jcc(Assembler::notEqual, *failure_target);
1800 // successful cast, fall through to profile or jump
1801 } else {
1802 // See if we get an immediate positive hit
1803 __ jcc(Assembler::equal, *success_target);
1804 // check for self
1805 #ifdef _LP64
1806 __ cmpptr(klass_RInfo, k_RInfo);
1807 #else
1808 __ cmpoop(klass_RInfo, k->constant_encoding());
1809 #endif // _LP64
1810 __ jcc(Assembler::equal, *success_target);
1812 __ push(klass_RInfo);
1813 #ifdef _LP64
1814 __ push(k_RInfo);
1815 #else
1816 __ pushoop(k->constant_encoding());
1817 #endif // _LP64
1818 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
1819 __ pop(klass_RInfo);
1820 __ pop(klass_RInfo);
1821 // result is a boolean
1822 __ cmpl(klass_RInfo, 0);
1823 __ jcc(Assembler::equal, *failure_target);
1824 // successful cast, fall through to profile or jump
1825 }
1826 } else {
1827 // perform the fast part of the checking logic
1828 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL);
1829 // call out-of-line instance of __ check_klass_subtype_slow_path(...):
1830 __ push(klass_RInfo);
1831 __ push(k_RInfo);
1832 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
1833 __ pop(klass_RInfo);
1834 __ pop(k_RInfo);
1835 // result is a boolean
1836 __ cmpl(k_RInfo, 0);
1837 __ jcc(Assembler::equal, *failure_target);
1838 // successful cast, fall through to profile or jump
1839 }
1840 }
1841 if (op->should_profile()) {
1842 Register mdo = klass_RInfo, recv = k_RInfo;
1843 __ bind(profile_cast_success);
1844 __ movoop(mdo, md->constant_encoding());
1845 __ load_klass(recv, obj);
1846 Label update_done;
1847 type_profile_helper(mdo, md, data, recv, success);
1848 __ jmp(*success);
1850 __ bind(profile_cast_failure);
1851 __ movoop(mdo, md->constant_encoding());
1852 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
1853 __ subptr(counter_addr, DataLayout::counter_increment);
1854 __ jmp(*failure);
1855 }
1856 __ jmp(*success);
1857 }
1860 void LIR_Assembler::emit_opTypeCheck(LIR_OpTypeCheck* op) {
1861 LIR_Code code = op->code();
1862 if (code == lir_store_check) {
1863 Register value = op->object()->as_register();
1864 Register array = op->array()->as_register();
1865 Register k_RInfo = op->tmp1()->as_register();
1866 Register klass_RInfo = op->tmp2()->as_register();
1867 Register Rtmp1 = op->tmp3()->as_register();
1869 CodeStub* stub = op->stub();
1871 // check if it needs to be profiled
1872 ciMethodData* md;
1873 ciProfileData* data;
1875 if (op->should_profile()) {
1876 ciMethod* method = op->profiled_method();
1877 assert(method != NULL, "Should have method");
1878 int bci = op->profiled_bci();
1879 md = method->method_data_or_null();
1880 assert(md != NULL, "Sanity");
1881 data = md->bci_to_data(bci);
1882 assert(data != NULL, "need data for type check");
1883 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check");
1884 }
1885 Label profile_cast_success, profile_cast_failure, done;
1886 Label *success_target = op->should_profile() ? &profile_cast_success : &done;
1887 Label *failure_target = op->should_profile() ? &profile_cast_failure : stub->entry();
1889 __ cmpptr(value, (int32_t)NULL_WORD);
1890 if (op->should_profile()) {
1891 Label not_null;
1892 __ jccb(Assembler::notEqual, not_null);
1893 // Object is null; update MDO and exit
1894 Register mdo = klass_RInfo;
1895 __ movoop(mdo, md->constant_encoding());
1896 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::header_offset()));
1897 int header_bits = DataLayout::flag_mask_to_header_mask(BitData::null_seen_byte_constant());
1898 __ orl(data_addr, header_bits);
1899 __ jmp(done);
1900 __ bind(not_null);
1901 } else {
1902 __ jcc(Assembler::equal, done);
1903 }
1905 add_debug_info_for_null_check_here(op->info_for_exception());
1906 __ load_klass(k_RInfo, array);
1907 __ load_klass(klass_RInfo, value);
1909 // get instance klass (it's already uncompressed)
1910 __ movptr(k_RInfo, Address(k_RInfo, objArrayKlass::element_klass_offset_in_bytes() + sizeof(oopDesc)));
1911 // perform the fast part of the checking logic
1912 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL);
1913 // call out-of-line instance of __ check_klass_subtype_slow_path(...):
1914 __ push(klass_RInfo);
1915 __ push(k_RInfo);
1916 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
1917 __ pop(klass_RInfo);
1918 __ pop(k_RInfo);
1919 // result is a boolean
1920 __ cmpl(k_RInfo, 0);
1921 __ jcc(Assembler::equal, *failure_target);
1922 // fall through to the success case
1924 if (op->should_profile()) {
1925 Register mdo = klass_RInfo, recv = k_RInfo;
1926 __ bind(profile_cast_success);
1927 __ movoop(mdo, md->constant_encoding());
1928 __ load_klass(recv, value);
1929 Label update_done;
1930 type_profile_helper(mdo, md, data, recv, &done);
1931 __ jmpb(done);
1933 __ bind(profile_cast_failure);
1934 __ movoop(mdo, md->constant_encoding());
1935 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
1936 __ subptr(counter_addr, DataLayout::counter_increment);
1937 __ jmp(*stub->entry());
1938 }
1940 __ bind(done);
1941 } else
1942 if (code == lir_checkcast) {
1943 Register obj = op->object()->as_register();
1944 Register dst = op->result_opr()->as_register();
1945 Label success;
1946 emit_typecheck_helper(op, &success, op->stub()->entry(), &success);
1947 __ bind(success);
1948 if (dst != obj) {
1949 __ mov(dst, obj);
1950 }
1951 } else
1952 if (code == lir_instanceof) {
1953 Register obj = op->object()->as_register();
1954 Register dst = op->result_opr()->as_register();
1955 Label success, failure, done;
1956 emit_typecheck_helper(op, &success, &failure, &failure);
1957 __ bind(failure);
1958 __ xorptr(dst, dst);
1959 __ jmpb(done);
1960 __ bind(success);
1961 __ movptr(dst, 1);
1962 __ bind(done);
1963 } else {
1964 ShouldNotReachHere();
1965 }
1967 }
1970 void LIR_Assembler::emit_compare_and_swap(LIR_OpCompareAndSwap* op) {
1971 if (LP64_ONLY(false &&) op->code() == lir_cas_long && VM_Version::supports_cx8()) {
1972 assert(op->cmp_value()->as_register_lo() == rax, "wrong register");
1973 assert(op->cmp_value()->as_register_hi() == rdx, "wrong register");
1974 assert(op->new_value()->as_register_lo() == rbx, "wrong register");
1975 assert(op->new_value()->as_register_hi() == rcx, "wrong register");
1976 Register addr = op->addr()->as_register();
1977 if (os::is_MP()) {
1978 __ lock();
1979 }
1980 NOT_LP64(__ cmpxchg8(Address(addr, 0)));
1982 } else if (op->code() == lir_cas_int || op->code() == lir_cas_obj ) {
1983 NOT_LP64(assert(op->addr()->is_single_cpu(), "must be single");)
1984 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo());
1985 Register newval = op->new_value()->as_register();
1986 Register cmpval = op->cmp_value()->as_register();
1987 assert(cmpval == rax, "wrong register");
1988 assert(newval != NULL, "new val must be register");
1989 assert(cmpval != newval, "cmp and new values must be in different registers");
1990 assert(cmpval != addr, "cmp and addr must be in different registers");
1991 assert(newval != addr, "new value and addr must be in different registers");
1993 if ( op->code() == lir_cas_obj) {
1994 #ifdef _LP64
1995 if (UseCompressedOops) {
1996 __ encode_heap_oop(cmpval);
1997 __ mov(rscratch1, newval);
1998 __ encode_heap_oop(rscratch1);
1999 if (os::is_MP()) {
2000 __ lock();
2001 }
2002 // cmpval (rax) is implicitly used by this instruction
2003 __ cmpxchgl(rscratch1, Address(addr, 0));
2004 } else
2005 #endif
2006 {
2007 if (os::is_MP()) {
2008 __ lock();
2009 }
2010 __ cmpxchgptr(newval, Address(addr, 0));
2011 }
2012 } else {
2013 assert(op->code() == lir_cas_int, "lir_cas_int expected");
2014 if (os::is_MP()) {
2015 __ lock();
2016 }
2017 __ cmpxchgl(newval, Address(addr, 0));
2018 }
2019 #ifdef _LP64
2020 } else if (op->code() == lir_cas_long) {
2021 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo());
2022 Register newval = op->new_value()->as_register_lo();
2023 Register cmpval = op->cmp_value()->as_register_lo();
2024 assert(cmpval == rax, "wrong register");
2025 assert(newval != NULL, "new val must be register");
2026 assert(cmpval != newval, "cmp and new values must be in different registers");
2027 assert(cmpval != addr, "cmp and addr must be in different registers");
2028 assert(newval != addr, "new value and addr must be in different registers");
2029 if (os::is_MP()) {
2030 __ lock();
2031 }
2032 __ cmpxchgq(newval, Address(addr, 0));
2033 #endif // _LP64
2034 } else {
2035 Unimplemented();
2036 }
2037 }
2039 void LIR_Assembler::cmove(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result, BasicType type) {
2040 Assembler::Condition acond, ncond;
2041 switch (condition) {
2042 case lir_cond_equal: acond = Assembler::equal; ncond = Assembler::notEqual; break;
2043 case lir_cond_notEqual: acond = Assembler::notEqual; ncond = Assembler::equal; break;
2044 case lir_cond_less: acond = Assembler::less; ncond = Assembler::greaterEqual; break;
2045 case lir_cond_lessEqual: acond = Assembler::lessEqual; ncond = Assembler::greater; break;
2046 case lir_cond_greaterEqual: acond = Assembler::greaterEqual; ncond = Assembler::less; break;
2047 case lir_cond_greater: acond = Assembler::greater; ncond = Assembler::lessEqual; break;
2048 case lir_cond_belowEqual: acond = Assembler::belowEqual; ncond = Assembler::above; break;
2049 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; ncond = Assembler::below; break;
2050 default: ShouldNotReachHere();
2051 }
2053 if (opr1->is_cpu_register()) {
2054 reg2reg(opr1, result);
2055 } else if (opr1->is_stack()) {
2056 stack2reg(opr1, result, result->type());
2057 } else if (opr1->is_constant()) {
2058 const2reg(opr1, result, lir_patch_none, NULL);
2059 } else {
2060 ShouldNotReachHere();
2061 }
2063 if (VM_Version::supports_cmov() && !opr2->is_constant()) {
2064 // optimized version that does not require a branch
2065 if (opr2->is_single_cpu()) {
2066 assert(opr2->cpu_regnr() != result->cpu_regnr(), "opr2 already overwritten by previous move");
2067 __ cmov(ncond, result->as_register(), opr2->as_register());
2068 } else if (opr2->is_double_cpu()) {
2069 assert(opr2->cpu_regnrLo() != result->cpu_regnrLo() && opr2->cpu_regnrLo() != result->cpu_regnrHi(), "opr2 already overwritten by previous move");
2070 assert(opr2->cpu_regnrHi() != result->cpu_regnrLo() && opr2->cpu_regnrHi() != result->cpu_regnrHi(), "opr2 already overwritten by previous move");
2071 __ cmovptr(ncond, result->as_register_lo(), opr2->as_register_lo());
2072 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), opr2->as_register_hi());)
2073 } else if (opr2->is_single_stack()) {
2074 __ cmovl(ncond, result->as_register(), frame_map()->address_for_slot(opr2->single_stack_ix()));
2075 } else if (opr2->is_double_stack()) {
2076 __ cmovptr(ncond, result->as_register_lo(), frame_map()->address_for_slot(opr2->double_stack_ix(), lo_word_offset_in_bytes));
2077 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), frame_map()->address_for_slot(opr2->double_stack_ix(), hi_word_offset_in_bytes));)
2078 } else {
2079 ShouldNotReachHere();
2080 }
2082 } else {
2083 Label skip;
2084 __ jcc (acond, skip);
2085 if (opr2->is_cpu_register()) {
2086 reg2reg(opr2, result);
2087 } else if (opr2->is_stack()) {
2088 stack2reg(opr2, result, result->type());
2089 } else if (opr2->is_constant()) {
2090 const2reg(opr2, result, lir_patch_none, NULL);
2091 } else {
2092 ShouldNotReachHere();
2093 }
2094 __ bind(skip);
2095 }
2096 }
2099 void LIR_Assembler::arith_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dest, CodeEmitInfo* info, bool pop_fpu_stack) {
2100 assert(info == NULL, "should never be used, idiv/irem and ldiv/lrem not handled by this method");
2102 if (left->is_single_cpu()) {
2103 assert(left == dest, "left and dest must be equal");
2104 Register lreg = left->as_register();
2106 if (right->is_single_cpu()) {
2107 // cpu register - cpu register
2108 Register rreg = right->as_register();
2109 switch (code) {
2110 case lir_add: __ addl (lreg, rreg); break;
2111 case lir_sub: __ subl (lreg, rreg); break;
2112 case lir_mul: __ imull(lreg, rreg); break;
2113 default: ShouldNotReachHere();
2114 }
2116 } else if (right->is_stack()) {
2117 // cpu register - stack
2118 Address raddr = frame_map()->address_for_slot(right->single_stack_ix());
2119 switch (code) {
2120 case lir_add: __ addl(lreg, raddr); break;
2121 case lir_sub: __ subl(lreg, raddr); break;
2122 default: ShouldNotReachHere();
2123 }
2125 } else if (right->is_constant()) {
2126 // cpu register - constant
2127 jint c = right->as_constant_ptr()->as_jint();
2128 switch (code) {
2129 case lir_add: {
2130 __ incrementl(lreg, c);
2131 break;
2132 }
2133 case lir_sub: {
2134 __ decrementl(lreg, c);
2135 break;
2136 }
2137 default: ShouldNotReachHere();
2138 }
2140 } else {
2141 ShouldNotReachHere();
2142 }
2144 } else if (left->is_double_cpu()) {
2145 assert(left == dest, "left and dest must be equal");
2146 Register lreg_lo = left->as_register_lo();
2147 Register lreg_hi = left->as_register_hi();
2149 if (right->is_double_cpu()) {
2150 // cpu register - cpu register
2151 Register rreg_lo = right->as_register_lo();
2152 Register rreg_hi = right->as_register_hi();
2153 NOT_LP64(assert_different_registers(lreg_lo, lreg_hi, rreg_lo, rreg_hi));
2154 LP64_ONLY(assert_different_registers(lreg_lo, rreg_lo));
2155 switch (code) {
2156 case lir_add:
2157 __ addptr(lreg_lo, rreg_lo);
2158 NOT_LP64(__ adcl(lreg_hi, rreg_hi));
2159 break;
2160 case lir_sub:
2161 __ subptr(lreg_lo, rreg_lo);
2162 NOT_LP64(__ sbbl(lreg_hi, rreg_hi));
2163 break;
2164 case lir_mul:
2165 #ifdef _LP64
2166 __ imulq(lreg_lo, rreg_lo);
2167 #else
2168 assert(lreg_lo == rax && lreg_hi == rdx, "must be");
2169 __ imull(lreg_hi, rreg_lo);
2170 __ imull(rreg_hi, lreg_lo);
2171 __ addl (rreg_hi, lreg_hi);
2172 __ mull (rreg_lo);
2173 __ addl (lreg_hi, rreg_hi);
2174 #endif // _LP64
2175 break;
2176 default:
2177 ShouldNotReachHere();
2178 }
2180 } else if (right->is_constant()) {
2181 // cpu register - constant
2182 #ifdef _LP64
2183 jlong c = right->as_constant_ptr()->as_jlong_bits();
2184 __ movptr(r10, (intptr_t) c);
2185 switch (code) {
2186 case lir_add:
2187 __ addptr(lreg_lo, r10);
2188 break;
2189 case lir_sub:
2190 __ subptr(lreg_lo, r10);
2191 break;
2192 default:
2193 ShouldNotReachHere();
2194 }
2195 #else
2196 jint c_lo = right->as_constant_ptr()->as_jint_lo();
2197 jint c_hi = right->as_constant_ptr()->as_jint_hi();
2198 switch (code) {
2199 case lir_add:
2200 __ addptr(lreg_lo, c_lo);
2201 __ adcl(lreg_hi, c_hi);
2202 break;
2203 case lir_sub:
2204 __ subptr(lreg_lo, c_lo);
2205 __ sbbl(lreg_hi, c_hi);
2206 break;
2207 default:
2208 ShouldNotReachHere();
2209 }
2210 #endif // _LP64
2212 } else {
2213 ShouldNotReachHere();
2214 }
2216 } else if (left->is_single_xmm()) {
2217 assert(left == dest, "left and dest must be equal");
2218 XMMRegister lreg = left->as_xmm_float_reg();
2220 if (right->is_single_xmm()) {
2221 XMMRegister rreg = right->as_xmm_float_reg();
2222 switch (code) {
2223 case lir_add: __ addss(lreg, rreg); break;
2224 case lir_sub: __ subss(lreg, rreg); break;
2225 case lir_mul_strictfp: // fall through
2226 case lir_mul: __ mulss(lreg, rreg); break;
2227 case lir_div_strictfp: // fall through
2228 case lir_div: __ divss(lreg, rreg); break;
2229 default: ShouldNotReachHere();
2230 }
2231 } else {
2232 Address raddr;
2233 if (right->is_single_stack()) {
2234 raddr = frame_map()->address_for_slot(right->single_stack_ix());
2235 } else if (right->is_constant()) {
2236 // hack for now
2237 raddr = __ as_Address(InternalAddress(float_constant(right->as_jfloat())));
2238 } else {
2239 ShouldNotReachHere();
2240 }
2241 switch (code) {
2242 case lir_add: __ addss(lreg, raddr); break;
2243 case lir_sub: __ subss(lreg, raddr); break;
2244 case lir_mul_strictfp: // fall through
2245 case lir_mul: __ mulss(lreg, raddr); break;
2246 case lir_div_strictfp: // fall through
2247 case lir_div: __ divss(lreg, raddr); break;
2248 default: ShouldNotReachHere();
2249 }
2250 }
2252 } else if (left->is_double_xmm()) {
2253 assert(left == dest, "left and dest must be equal");
2255 XMMRegister lreg = left->as_xmm_double_reg();
2256 if (right->is_double_xmm()) {
2257 XMMRegister rreg = right->as_xmm_double_reg();
2258 switch (code) {
2259 case lir_add: __ addsd(lreg, rreg); break;
2260 case lir_sub: __ subsd(lreg, rreg); break;
2261 case lir_mul_strictfp: // fall through
2262 case lir_mul: __ mulsd(lreg, rreg); break;
2263 case lir_div_strictfp: // fall through
2264 case lir_div: __ divsd(lreg, rreg); break;
2265 default: ShouldNotReachHere();
2266 }
2267 } else {
2268 Address raddr;
2269 if (right->is_double_stack()) {
2270 raddr = frame_map()->address_for_slot(right->double_stack_ix());
2271 } else if (right->is_constant()) {
2272 // hack for now
2273 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble())));
2274 } else {
2275 ShouldNotReachHere();
2276 }
2277 switch (code) {
2278 case lir_add: __ addsd(lreg, raddr); break;
2279 case lir_sub: __ subsd(lreg, raddr); break;
2280 case lir_mul_strictfp: // fall through
2281 case lir_mul: __ mulsd(lreg, raddr); break;
2282 case lir_div_strictfp: // fall through
2283 case lir_div: __ divsd(lreg, raddr); break;
2284 default: ShouldNotReachHere();
2285 }
2286 }
2288 } else if (left->is_single_fpu()) {
2289 assert(dest->is_single_fpu(), "fpu stack allocation required");
2291 if (right->is_single_fpu()) {
2292 arith_fpu_implementation(code, left->fpu_regnr(), right->fpu_regnr(), dest->fpu_regnr(), pop_fpu_stack);
2294 } else {
2295 assert(left->fpu_regnr() == 0, "left must be on TOS");
2296 assert(dest->fpu_regnr() == 0, "dest must be on TOS");
2298 Address raddr;
2299 if (right->is_single_stack()) {
2300 raddr = frame_map()->address_for_slot(right->single_stack_ix());
2301 } else if (right->is_constant()) {
2302 address const_addr = float_constant(right->as_jfloat());
2303 assert(const_addr != NULL, "incorrect float/double constant maintainance");
2304 // hack for now
2305 raddr = __ as_Address(InternalAddress(const_addr));
2306 } else {
2307 ShouldNotReachHere();
2308 }
2310 switch (code) {
2311 case lir_add: __ fadd_s(raddr); break;
2312 case lir_sub: __ fsub_s(raddr); break;
2313 case lir_mul_strictfp: // fall through
2314 case lir_mul: __ fmul_s(raddr); break;
2315 case lir_div_strictfp: // fall through
2316 case lir_div: __ fdiv_s(raddr); break;
2317 default: ShouldNotReachHere();
2318 }
2319 }
2321 } else if (left->is_double_fpu()) {
2322 assert(dest->is_double_fpu(), "fpu stack allocation required");
2324 if (code == lir_mul_strictfp || code == lir_div_strictfp) {
2325 // Double values require special handling for strictfp mul/div on x86
2326 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1()));
2327 __ fmulp(left->fpu_regnrLo() + 1);
2328 }
2330 if (right->is_double_fpu()) {
2331 arith_fpu_implementation(code, left->fpu_regnrLo(), right->fpu_regnrLo(), dest->fpu_regnrLo(), pop_fpu_stack);
2333 } else {
2334 assert(left->fpu_regnrLo() == 0, "left must be on TOS");
2335 assert(dest->fpu_regnrLo() == 0, "dest must be on TOS");
2337 Address raddr;
2338 if (right->is_double_stack()) {
2339 raddr = frame_map()->address_for_slot(right->double_stack_ix());
2340 } else if (right->is_constant()) {
2341 // hack for now
2342 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble())));
2343 } else {
2344 ShouldNotReachHere();
2345 }
2347 switch (code) {
2348 case lir_add: __ fadd_d(raddr); break;
2349 case lir_sub: __ fsub_d(raddr); break;
2350 case lir_mul_strictfp: // fall through
2351 case lir_mul: __ fmul_d(raddr); break;
2352 case lir_div_strictfp: // fall through
2353 case lir_div: __ fdiv_d(raddr); break;
2354 default: ShouldNotReachHere();
2355 }
2356 }
2358 if (code == lir_mul_strictfp || code == lir_div_strictfp) {
2359 // Double values require special handling for strictfp mul/div on x86
2360 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2()));
2361 __ fmulp(dest->fpu_regnrLo() + 1);
2362 }
2364 } else if (left->is_single_stack() || left->is_address()) {
2365 assert(left == dest, "left and dest must be equal");
2367 Address laddr;
2368 if (left->is_single_stack()) {
2369 laddr = frame_map()->address_for_slot(left->single_stack_ix());
2370 } else if (left->is_address()) {
2371 laddr = as_Address(left->as_address_ptr());
2372 } else {
2373 ShouldNotReachHere();
2374 }
2376 if (right->is_single_cpu()) {
2377 Register rreg = right->as_register();
2378 switch (code) {
2379 case lir_add: __ addl(laddr, rreg); break;
2380 case lir_sub: __ subl(laddr, rreg); break;
2381 default: ShouldNotReachHere();
2382 }
2383 } else if (right->is_constant()) {
2384 jint c = right->as_constant_ptr()->as_jint();
2385 switch (code) {
2386 case lir_add: {
2387 __ incrementl(laddr, c);
2388 break;
2389 }
2390 case lir_sub: {
2391 __ decrementl(laddr, c);
2392 break;
2393 }
2394 default: ShouldNotReachHere();
2395 }
2396 } else {
2397 ShouldNotReachHere();
2398 }
2400 } else {
2401 ShouldNotReachHere();
2402 }
2403 }
2405 void LIR_Assembler::arith_fpu_implementation(LIR_Code code, int left_index, int right_index, int dest_index, bool pop_fpu_stack) {
2406 assert(pop_fpu_stack || (left_index == dest_index || right_index == dest_index), "invalid LIR");
2407 assert(!pop_fpu_stack || (left_index - 1 == dest_index || right_index - 1 == dest_index), "invalid LIR");
2408 assert(left_index == 0 || right_index == 0, "either must be on top of stack");
2410 bool left_is_tos = (left_index == 0);
2411 bool dest_is_tos = (dest_index == 0);
2412 int non_tos_index = (left_is_tos ? right_index : left_index);
2414 switch (code) {
2415 case lir_add:
2416 if (pop_fpu_stack) __ faddp(non_tos_index);
2417 else if (dest_is_tos) __ fadd (non_tos_index);
2418 else __ fadda(non_tos_index);
2419 break;
2421 case lir_sub:
2422 if (left_is_tos) {
2423 if (pop_fpu_stack) __ fsubrp(non_tos_index);
2424 else if (dest_is_tos) __ fsub (non_tos_index);
2425 else __ fsubra(non_tos_index);
2426 } else {
2427 if (pop_fpu_stack) __ fsubp (non_tos_index);
2428 else if (dest_is_tos) __ fsubr (non_tos_index);
2429 else __ fsuba (non_tos_index);
2430 }
2431 break;
2433 case lir_mul_strictfp: // fall through
2434 case lir_mul:
2435 if (pop_fpu_stack) __ fmulp(non_tos_index);
2436 else if (dest_is_tos) __ fmul (non_tos_index);
2437 else __ fmula(non_tos_index);
2438 break;
2440 case lir_div_strictfp: // fall through
2441 case lir_div:
2442 if (left_is_tos) {
2443 if (pop_fpu_stack) __ fdivrp(non_tos_index);
2444 else if (dest_is_tos) __ fdiv (non_tos_index);
2445 else __ fdivra(non_tos_index);
2446 } else {
2447 if (pop_fpu_stack) __ fdivp (non_tos_index);
2448 else if (dest_is_tos) __ fdivr (non_tos_index);
2449 else __ fdiva (non_tos_index);
2450 }
2451 break;
2453 case lir_rem:
2454 assert(left_is_tos && dest_is_tos && right_index == 1, "must be guaranteed by FPU stack allocation");
2455 __ fremr(noreg);
2456 break;
2458 default:
2459 ShouldNotReachHere();
2460 }
2461 }
2464 void LIR_Assembler::intrinsic_op(LIR_Code code, LIR_Opr value, LIR_Opr unused, LIR_Opr dest, LIR_Op* op) {
2465 if (value->is_double_xmm()) {
2466 switch(code) {
2467 case lir_abs :
2468 {
2469 if (dest->as_xmm_double_reg() != value->as_xmm_double_reg()) {
2470 __ movdbl(dest->as_xmm_double_reg(), value->as_xmm_double_reg());
2471 }
2472 __ andpd(dest->as_xmm_double_reg(),
2473 ExternalAddress((address)double_signmask_pool));
2474 }
2475 break;
2477 case lir_sqrt: __ sqrtsd(dest->as_xmm_double_reg(), value->as_xmm_double_reg()); break;
2478 // all other intrinsics are not available in the SSE instruction set, so FPU is used
2479 default : ShouldNotReachHere();
2480 }
2482 } else if (value->is_double_fpu()) {
2483 assert(value->fpu_regnrLo() == 0 && dest->fpu_regnrLo() == 0, "both must be on TOS");
2484 switch(code) {
2485 case lir_log : __ flog() ; break;
2486 case lir_log10 : __ flog10() ; break;
2487 case lir_abs : __ fabs() ; break;
2488 case lir_sqrt : __ fsqrt(); break;
2489 case lir_sin :
2490 // Should consider not saving rbx, if not necessary
2491 __ trigfunc('s', op->as_Op2()->fpu_stack_size());
2492 break;
2493 case lir_cos :
2494 // Should consider not saving rbx, if not necessary
2495 assert(op->as_Op2()->fpu_stack_size() <= 6, "sin and cos need two free stack slots");
2496 __ trigfunc('c', op->as_Op2()->fpu_stack_size());
2497 break;
2498 case lir_tan :
2499 // Should consider not saving rbx, if not necessary
2500 __ trigfunc('t', op->as_Op2()->fpu_stack_size());
2501 break;
2502 default : ShouldNotReachHere();
2503 }
2504 } else {
2505 Unimplemented();
2506 }
2507 }
2509 void LIR_Assembler::logic_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst) {
2510 // assert(left->destroys_register(), "check");
2511 if (left->is_single_cpu()) {
2512 Register reg = left->as_register();
2513 if (right->is_constant()) {
2514 int val = right->as_constant_ptr()->as_jint();
2515 switch (code) {
2516 case lir_logic_and: __ andl (reg, val); break;
2517 case lir_logic_or: __ orl (reg, val); break;
2518 case lir_logic_xor: __ xorl (reg, val); break;
2519 default: ShouldNotReachHere();
2520 }
2521 } else if (right->is_stack()) {
2522 // added support for stack operands
2523 Address raddr = frame_map()->address_for_slot(right->single_stack_ix());
2524 switch (code) {
2525 case lir_logic_and: __ andl (reg, raddr); break;
2526 case lir_logic_or: __ orl (reg, raddr); break;
2527 case lir_logic_xor: __ xorl (reg, raddr); break;
2528 default: ShouldNotReachHere();
2529 }
2530 } else {
2531 Register rright = right->as_register();
2532 switch (code) {
2533 case lir_logic_and: __ andptr (reg, rright); break;
2534 case lir_logic_or : __ orptr (reg, rright); break;
2535 case lir_logic_xor: __ xorptr (reg, rright); break;
2536 default: ShouldNotReachHere();
2537 }
2538 }
2539 move_regs(reg, dst->as_register());
2540 } else {
2541 Register l_lo = left->as_register_lo();
2542 Register l_hi = left->as_register_hi();
2543 if (right->is_constant()) {
2544 #ifdef _LP64
2545 __ mov64(rscratch1, right->as_constant_ptr()->as_jlong());
2546 switch (code) {
2547 case lir_logic_and:
2548 __ andq(l_lo, rscratch1);
2549 break;
2550 case lir_logic_or:
2551 __ orq(l_lo, rscratch1);
2552 break;
2553 case lir_logic_xor:
2554 __ xorq(l_lo, rscratch1);
2555 break;
2556 default: ShouldNotReachHere();
2557 }
2558 #else
2559 int r_lo = right->as_constant_ptr()->as_jint_lo();
2560 int r_hi = right->as_constant_ptr()->as_jint_hi();
2561 switch (code) {
2562 case lir_logic_and:
2563 __ andl(l_lo, r_lo);
2564 __ andl(l_hi, r_hi);
2565 break;
2566 case lir_logic_or:
2567 __ orl(l_lo, r_lo);
2568 __ orl(l_hi, r_hi);
2569 break;
2570 case lir_logic_xor:
2571 __ xorl(l_lo, r_lo);
2572 __ xorl(l_hi, r_hi);
2573 break;
2574 default: ShouldNotReachHere();
2575 }
2576 #endif // _LP64
2577 } else {
2578 #ifdef _LP64
2579 Register r_lo;
2580 if (right->type() == T_OBJECT || right->type() == T_ARRAY) {
2581 r_lo = right->as_register();
2582 } else {
2583 r_lo = right->as_register_lo();
2584 }
2585 #else
2586 Register r_lo = right->as_register_lo();
2587 Register r_hi = right->as_register_hi();
2588 assert(l_lo != r_hi, "overwriting registers");
2589 #endif
2590 switch (code) {
2591 case lir_logic_and:
2592 __ andptr(l_lo, r_lo);
2593 NOT_LP64(__ andptr(l_hi, r_hi);)
2594 break;
2595 case lir_logic_or:
2596 __ orptr(l_lo, r_lo);
2597 NOT_LP64(__ orptr(l_hi, r_hi);)
2598 break;
2599 case lir_logic_xor:
2600 __ xorptr(l_lo, r_lo);
2601 NOT_LP64(__ xorptr(l_hi, r_hi);)
2602 break;
2603 default: ShouldNotReachHere();
2604 }
2605 }
2607 Register dst_lo = dst->as_register_lo();
2608 Register dst_hi = dst->as_register_hi();
2610 #ifdef _LP64
2611 move_regs(l_lo, dst_lo);
2612 #else
2613 if (dst_lo == l_hi) {
2614 assert(dst_hi != l_lo, "overwriting registers");
2615 move_regs(l_hi, dst_hi);
2616 move_regs(l_lo, dst_lo);
2617 } else {
2618 assert(dst_lo != l_hi, "overwriting registers");
2619 move_regs(l_lo, dst_lo);
2620 move_regs(l_hi, dst_hi);
2621 }
2622 #endif // _LP64
2623 }
2624 }
2627 // we assume that rax, and rdx can be overwritten
2628 void LIR_Assembler::arithmetic_idiv(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr temp, LIR_Opr result, CodeEmitInfo* info) {
2630 assert(left->is_single_cpu(), "left must be register");
2631 assert(right->is_single_cpu() || right->is_constant(), "right must be register or constant");
2632 assert(result->is_single_cpu(), "result must be register");
2634 // assert(left->destroys_register(), "check");
2635 // assert(right->destroys_register(), "check");
2637 Register lreg = left->as_register();
2638 Register dreg = result->as_register();
2640 if (right->is_constant()) {
2641 int divisor = right->as_constant_ptr()->as_jint();
2642 assert(divisor > 0 && is_power_of_2(divisor), "must be");
2643 if (code == lir_idiv) {
2644 assert(lreg == rax, "must be rax,");
2645 assert(temp->as_register() == rdx, "tmp register must be rdx");
2646 __ cdql(); // sign extend into rdx:rax
2647 if (divisor == 2) {
2648 __ subl(lreg, rdx);
2649 } else {
2650 __ andl(rdx, divisor - 1);
2651 __ addl(lreg, rdx);
2652 }
2653 __ sarl(lreg, log2_intptr(divisor));
2654 move_regs(lreg, dreg);
2655 } else if (code == lir_irem) {
2656 Label done;
2657 __ mov(dreg, lreg);
2658 __ andl(dreg, 0x80000000 | (divisor - 1));
2659 __ jcc(Assembler::positive, done);
2660 __ decrement(dreg);
2661 __ orl(dreg, ~(divisor - 1));
2662 __ increment(dreg);
2663 __ bind(done);
2664 } else {
2665 ShouldNotReachHere();
2666 }
2667 } else {
2668 Register rreg = right->as_register();
2669 assert(lreg == rax, "left register must be rax,");
2670 assert(rreg != rdx, "right register must not be rdx");
2671 assert(temp->as_register() == rdx, "tmp register must be rdx");
2673 move_regs(lreg, rax);
2675 int idivl_offset = __ corrected_idivl(rreg);
2676 add_debug_info_for_div0(idivl_offset, info);
2677 if (code == lir_irem) {
2678 move_regs(rdx, dreg); // result is in rdx
2679 } else {
2680 move_regs(rax, dreg);
2681 }
2682 }
2683 }
2686 void LIR_Assembler::comp_op(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Op2* op) {
2687 if (opr1->is_single_cpu()) {
2688 Register reg1 = opr1->as_register();
2689 if (opr2->is_single_cpu()) {
2690 // cpu register - cpu register
2691 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) {
2692 __ cmpptr(reg1, opr2->as_register());
2693 } else {
2694 assert(opr2->type() != T_OBJECT && opr2->type() != T_ARRAY, "cmp int, oop?");
2695 __ cmpl(reg1, opr2->as_register());
2696 }
2697 } else if (opr2->is_stack()) {
2698 // cpu register - stack
2699 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) {
2700 __ cmpptr(reg1, frame_map()->address_for_slot(opr2->single_stack_ix()));
2701 } else {
2702 __ cmpl(reg1, frame_map()->address_for_slot(opr2->single_stack_ix()));
2703 }
2704 } else if (opr2->is_constant()) {
2705 // cpu register - constant
2706 LIR_Const* c = opr2->as_constant_ptr();
2707 if (c->type() == T_INT) {
2708 __ cmpl(reg1, c->as_jint());
2709 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) {
2710 // In 64bit oops are single register
2711 jobject o = c->as_jobject();
2712 if (o == NULL) {
2713 __ cmpptr(reg1, (int32_t)NULL_WORD);
2714 } else {
2715 #ifdef _LP64
2716 __ movoop(rscratch1, o);
2717 __ cmpptr(reg1, rscratch1);
2718 #else
2719 __ cmpoop(reg1, c->as_jobject());
2720 #endif // _LP64
2721 }
2722 } else {
2723 ShouldNotReachHere();
2724 }
2725 // cpu register - address
2726 } else if (opr2->is_address()) {
2727 if (op->info() != NULL) {
2728 add_debug_info_for_null_check_here(op->info());
2729 }
2730 __ cmpl(reg1, as_Address(opr2->as_address_ptr()));
2731 } else {
2732 ShouldNotReachHere();
2733 }
2735 } else if(opr1->is_double_cpu()) {
2736 Register xlo = opr1->as_register_lo();
2737 Register xhi = opr1->as_register_hi();
2738 if (opr2->is_double_cpu()) {
2739 #ifdef _LP64
2740 __ cmpptr(xlo, opr2->as_register_lo());
2741 #else
2742 // cpu register - cpu register
2743 Register ylo = opr2->as_register_lo();
2744 Register yhi = opr2->as_register_hi();
2745 __ subl(xlo, ylo);
2746 __ sbbl(xhi, yhi);
2747 if (condition == lir_cond_equal || condition == lir_cond_notEqual) {
2748 __ orl(xhi, xlo);
2749 }
2750 #endif // _LP64
2751 } else if (opr2->is_constant()) {
2752 // cpu register - constant 0
2753 assert(opr2->as_jlong() == (jlong)0, "only handles zero");
2754 #ifdef _LP64
2755 __ cmpptr(xlo, (int32_t)opr2->as_jlong());
2756 #else
2757 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "only handles equals case");
2758 __ orl(xhi, xlo);
2759 #endif // _LP64
2760 } else {
2761 ShouldNotReachHere();
2762 }
2764 } else if (opr1->is_single_xmm()) {
2765 XMMRegister reg1 = opr1->as_xmm_float_reg();
2766 if (opr2->is_single_xmm()) {
2767 // xmm register - xmm register
2768 __ ucomiss(reg1, opr2->as_xmm_float_reg());
2769 } else if (opr2->is_stack()) {
2770 // xmm register - stack
2771 __ ucomiss(reg1, frame_map()->address_for_slot(opr2->single_stack_ix()));
2772 } else if (opr2->is_constant()) {
2773 // xmm register - constant
2774 __ ucomiss(reg1, InternalAddress(float_constant(opr2->as_jfloat())));
2775 } else if (opr2->is_address()) {
2776 // xmm register - address
2777 if (op->info() != NULL) {
2778 add_debug_info_for_null_check_here(op->info());
2779 }
2780 __ ucomiss(reg1, as_Address(opr2->as_address_ptr()));
2781 } else {
2782 ShouldNotReachHere();
2783 }
2785 } else if (opr1->is_double_xmm()) {
2786 XMMRegister reg1 = opr1->as_xmm_double_reg();
2787 if (opr2->is_double_xmm()) {
2788 // xmm register - xmm register
2789 __ ucomisd(reg1, opr2->as_xmm_double_reg());
2790 } else if (opr2->is_stack()) {
2791 // xmm register - stack
2792 __ ucomisd(reg1, frame_map()->address_for_slot(opr2->double_stack_ix()));
2793 } else if (opr2->is_constant()) {
2794 // xmm register - constant
2795 __ ucomisd(reg1, InternalAddress(double_constant(opr2->as_jdouble())));
2796 } else if (opr2->is_address()) {
2797 // xmm register - address
2798 if (op->info() != NULL) {
2799 add_debug_info_for_null_check_here(op->info());
2800 }
2801 __ ucomisd(reg1, as_Address(opr2->pointer()->as_address()));
2802 } else {
2803 ShouldNotReachHere();
2804 }
2806 } else if(opr1->is_single_fpu() || opr1->is_double_fpu()) {
2807 assert(opr1->is_fpu_register() && opr1->fpu() == 0, "currently left-hand side must be on TOS (relax this restriction)");
2808 assert(opr2->is_fpu_register(), "both must be registers");
2809 __ fcmp(noreg, opr2->fpu(), op->fpu_pop_count() > 0, op->fpu_pop_count() > 1);
2811 } else if (opr1->is_address() && opr2->is_constant()) {
2812 LIR_Const* c = opr2->as_constant_ptr();
2813 #ifdef _LP64
2814 if (c->type() == T_OBJECT || c->type() == T_ARRAY) {
2815 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "need to reverse");
2816 __ movoop(rscratch1, c->as_jobject());
2817 }
2818 #endif // LP64
2819 if (op->info() != NULL) {
2820 add_debug_info_for_null_check_here(op->info());
2821 }
2822 // special case: address - constant
2823 LIR_Address* addr = opr1->as_address_ptr();
2824 if (c->type() == T_INT) {
2825 __ cmpl(as_Address(addr), c->as_jint());
2826 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) {
2827 #ifdef _LP64
2828 // %%% Make this explode if addr isn't reachable until we figure out a
2829 // better strategy by giving noreg as the temp for as_Address
2830 __ cmpptr(rscratch1, as_Address(addr, noreg));
2831 #else
2832 __ cmpoop(as_Address(addr), c->as_jobject());
2833 #endif // _LP64
2834 } else {
2835 ShouldNotReachHere();
2836 }
2838 } else {
2839 ShouldNotReachHere();
2840 }
2841 }
2843 void LIR_Assembler::comp_fl2i(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst, LIR_Op2* op) {
2844 if (code == lir_cmp_fd2i || code == lir_ucmp_fd2i) {
2845 if (left->is_single_xmm()) {
2846 assert(right->is_single_xmm(), "must match");
2847 __ cmpss2int(left->as_xmm_float_reg(), right->as_xmm_float_reg(), dst->as_register(), code == lir_ucmp_fd2i);
2848 } else if (left->is_double_xmm()) {
2849 assert(right->is_double_xmm(), "must match");
2850 __ cmpsd2int(left->as_xmm_double_reg(), right->as_xmm_double_reg(), dst->as_register(), code == lir_ucmp_fd2i);
2852 } else {
2853 assert(left->is_single_fpu() || left->is_double_fpu(), "must be");
2854 assert(right->is_single_fpu() || right->is_double_fpu(), "must match");
2856 assert(left->fpu() == 0, "left must be on TOS");
2857 __ fcmp2int(dst->as_register(), code == lir_ucmp_fd2i, right->fpu(),
2858 op->fpu_pop_count() > 0, op->fpu_pop_count() > 1);
2859 }
2860 } else {
2861 assert(code == lir_cmp_l2i, "check");
2862 #ifdef _LP64
2863 Label done;
2864 Register dest = dst->as_register();
2865 __ cmpptr(left->as_register_lo(), right->as_register_lo());
2866 __ movl(dest, -1);
2867 __ jccb(Assembler::less, done);
2868 __ set_byte_if_not_zero(dest);
2869 __ movzbl(dest, dest);
2870 __ bind(done);
2871 #else
2872 __ lcmp2int(left->as_register_hi(),
2873 left->as_register_lo(),
2874 right->as_register_hi(),
2875 right->as_register_lo());
2876 move_regs(left->as_register_hi(), dst->as_register());
2877 #endif // _LP64
2878 }
2879 }
2882 void LIR_Assembler::align_call(LIR_Code code) {
2883 if (os::is_MP()) {
2884 // make sure that the displacement word of the call ends up word aligned
2885 int offset = __ offset();
2886 switch (code) {
2887 case lir_static_call:
2888 case lir_optvirtual_call:
2889 case lir_dynamic_call:
2890 offset += NativeCall::displacement_offset;
2891 break;
2892 case lir_icvirtual_call:
2893 offset += NativeCall::displacement_offset + NativeMovConstReg::instruction_size;
2894 break;
2895 case lir_virtual_call: // currently, sparc-specific for niagara
2896 default: ShouldNotReachHere();
2897 }
2898 while (offset++ % BytesPerWord != 0) {
2899 __ nop();
2900 }
2901 }
2902 }
2905 void LIR_Assembler::call(LIR_OpJavaCall* op, relocInfo::relocType rtype) {
2906 assert(!os::is_MP() || (__ offset() + NativeCall::displacement_offset) % BytesPerWord == 0,
2907 "must be aligned");
2908 __ call(AddressLiteral(op->addr(), rtype));
2909 add_call_info(code_offset(), op->info());
2910 }
2913 void LIR_Assembler::ic_call(LIR_OpJavaCall* op) {
2914 RelocationHolder rh = virtual_call_Relocation::spec(pc());
2915 __ movoop(IC_Klass, (jobject)Universe::non_oop_word());
2916 assert(!os::is_MP() ||
2917 (__ offset() + NativeCall::displacement_offset) % BytesPerWord == 0,
2918 "must be aligned");
2919 __ call(AddressLiteral(op->addr(), rh));
2920 add_call_info(code_offset(), op->info());
2921 }
2924 /* Currently, vtable-dispatch is only enabled for sparc platforms */
2925 void LIR_Assembler::vtable_call(LIR_OpJavaCall* op) {
2926 ShouldNotReachHere();
2927 }
2930 void LIR_Assembler::emit_static_call_stub() {
2931 address call_pc = __ pc();
2932 address stub = __ start_a_stub(call_stub_size);
2933 if (stub == NULL) {
2934 bailout("static call stub overflow");
2935 return;
2936 }
2938 int start = __ offset();
2939 if (os::is_MP()) {
2940 // make sure that the displacement word of the call ends up word aligned
2941 int offset = __ offset() + NativeMovConstReg::instruction_size + NativeCall::displacement_offset;
2942 while (offset++ % BytesPerWord != 0) {
2943 __ nop();
2944 }
2945 }
2946 __ relocate(static_stub_Relocation::spec(call_pc));
2947 __ movoop(rbx, (jobject)NULL);
2948 // must be set to -1 at code generation time
2949 assert(!os::is_MP() || ((__ offset() + 1) % BytesPerWord) == 0, "must be aligned on MP");
2950 // On 64bit this will die since it will take a movq & jmp, must be only a jmp
2951 __ jump(RuntimeAddress(__ pc()));
2953 assert(__ offset() - start <= call_stub_size, "stub too big");
2954 __ end_a_stub();
2955 }
2958 void LIR_Assembler::throw_op(LIR_Opr exceptionPC, LIR_Opr exceptionOop, CodeEmitInfo* info) {
2959 assert(exceptionOop->as_register() == rax, "must match");
2960 assert(exceptionPC->as_register() == rdx, "must match");
2962 // exception object is not added to oop map by LinearScan
2963 // (LinearScan assumes that no oops are in fixed registers)
2964 info->add_register_oop(exceptionOop);
2965 Runtime1::StubID unwind_id;
2967 // get current pc information
2968 // pc is only needed if the method has an exception handler, the unwind code does not need it.
2969 int pc_for_athrow_offset = __ offset();
2970 InternalAddress pc_for_athrow(__ pc());
2971 __ lea(exceptionPC->as_register(), pc_for_athrow);
2972 add_call_info(pc_for_athrow_offset, info); // for exception handler
2974 __ verify_not_null_oop(rax);
2975 // search an exception handler (rax: exception oop, rdx: throwing pc)
2976 if (compilation()->has_fpu_code()) {
2977 unwind_id = Runtime1::handle_exception_id;
2978 } else {
2979 unwind_id = Runtime1::handle_exception_nofpu_id;
2980 }
2981 __ call(RuntimeAddress(Runtime1::entry_for(unwind_id)));
2983 // enough room for two byte trap
2984 __ nop();
2985 }
2988 void LIR_Assembler::unwind_op(LIR_Opr exceptionOop) {
2989 assert(exceptionOop->as_register() == rax, "must match");
2991 __ jmp(_unwind_handler_entry);
2992 }
2995 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, LIR_Opr count, LIR_Opr dest, LIR_Opr tmp) {
2997 // optimized version for linear scan:
2998 // * count must be already in ECX (guaranteed by LinearScan)
2999 // * left and dest must be equal
3000 // * tmp must be unused
3001 assert(count->as_register() == SHIFT_count, "count must be in ECX");
3002 assert(left == dest, "left and dest must be equal");
3003 assert(tmp->is_illegal(), "wasting a register if tmp is allocated");
3005 if (left->is_single_cpu()) {
3006 Register value = left->as_register();
3007 assert(value != SHIFT_count, "left cannot be ECX");
3009 switch (code) {
3010 case lir_shl: __ shll(value); break;
3011 case lir_shr: __ sarl(value); break;
3012 case lir_ushr: __ shrl(value); break;
3013 default: ShouldNotReachHere();
3014 }
3015 } else if (left->is_double_cpu()) {
3016 Register lo = left->as_register_lo();
3017 Register hi = left->as_register_hi();
3018 assert(lo != SHIFT_count && hi != SHIFT_count, "left cannot be ECX");
3019 #ifdef _LP64
3020 switch (code) {
3021 case lir_shl: __ shlptr(lo); break;
3022 case lir_shr: __ sarptr(lo); break;
3023 case lir_ushr: __ shrptr(lo); break;
3024 default: ShouldNotReachHere();
3025 }
3026 #else
3028 switch (code) {
3029 case lir_shl: __ lshl(hi, lo); break;
3030 case lir_shr: __ lshr(hi, lo, true); break;
3031 case lir_ushr: __ lshr(hi, lo, false); break;
3032 default: ShouldNotReachHere();
3033 }
3034 #endif // LP64
3035 } else {
3036 ShouldNotReachHere();
3037 }
3038 }
3041 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, jint count, LIR_Opr dest) {
3042 if (dest->is_single_cpu()) {
3043 // first move left into dest so that left is not destroyed by the shift
3044 Register value = dest->as_register();
3045 count = count & 0x1F; // Java spec
3047 move_regs(left->as_register(), value);
3048 switch (code) {
3049 case lir_shl: __ shll(value, count); break;
3050 case lir_shr: __ sarl(value, count); break;
3051 case lir_ushr: __ shrl(value, count); break;
3052 default: ShouldNotReachHere();
3053 }
3054 } else if (dest->is_double_cpu()) {
3055 #ifndef _LP64
3056 Unimplemented();
3057 #else
3058 // first move left into dest so that left is not destroyed by the shift
3059 Register value = dest->as_register_lo();
3060 count = count & 0x1F; // Java spec
3062 move_regs(left->as_register_lo(), value);
3063 switch (code) {
3064 case lir_shl: __ shlptr(value, count); break;
3065 case lir_shr: __ sarptr(value, count); break;
3066 case lir_ushr: __ shrptr(value, count); break;
3067 default: ShouldNotReachHere();
3068 }
3069 #endif // _LP64
3070 } else {
3071 ShouldNotReachHere();
3072 }
3073 }
3076 void LIR_Assembler::store_parameter(Register r, int offset_from_rsp_in_words) {
3077 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
3078 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
3079 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
3080 __ movptr (Address(rsp, offset_from_rsp_in_bytes), r);
3081 }
3084 void LIR_Assembler::store_parameter(jint c, int offset_from_rsp_in_words) {
3085 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
3086 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
3087 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
3088 __ movptr (Address(rsp, offset_from_rsp_in_bytes), c);
3089 }
3092 void LIR_Assembler::store_parameter(jobject o, int offset_from_rsp_in_words) {
3093 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
3094 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
3095 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
3096 __ movoop (Address(rsp, offset_from_rsp_in_bytes), o);
3097 }
3100 // This code replaces a call to arraycopy; no exception may
3101 // be thrown in this code, they must be thrown in the System.arraycopy
3102 // activation frame; we could save some checks if this would not be the case
3103 void LIR_Assembler::emit_arraycopy(LIR_OpArrayCopy* op) {
3104 ciArrayKlass* default_type = op->expected_type();
3105 Register src = op->src()->as_register();
3106 Register dst = op->dst()->as_register();
3107 Register src_pos = op->src_pos()->as_register();
3108 Register dst_pos = op->dst_pos()->as_register();
3109 Register length = op->length()->as_register();
3110 Register tmp = op->tmp()->as_register();
3112 CodeStub* stub = op->stub();
3113 int flags = op->flags();
3114 BasicType basic_type = default_type != NULL ? default_type->element_type()->basic_type() : T_ILLEGAL;
3115 if (basic_type == T_ARRAY) basic_type = T_OBJECT;
3117 // if we don't know anything or it's an object array, just go through the generic arraycopy
3118 if (default_type == NULL) {
3119 Label done;
3120 // save outgoing arguments on stack in case call to System.arraycopy is needed
3121 // HACK ALERT. This code used to push the parameters in a hardwired fashion
3122 // for interpreter calling conventions. Now we have to do it in new style conventions.
3123 // For the moment until C1 gets the new register allocator I just force all the
3124 // args to the right place (except the register args) and then on the back side
3125 // reload the register args properly if we go slow path. Yuck
3127 // These are proper for the calling convention
3129 store_parameter(length, 2);
3130 store_parameter(dst_pos, 1);
3131 store_parameter(dst, 0);
3133 // these are just temporary placements until we need to reload
3134 store_parameter(src_pos, 3);
3135 store_parameter(src, 4);
3136 NOT_LP64(assert(src == rcx && src_pos == rdx, "mismatch in calling convention");)
3138 address entry = CAST_FROM_FN_PTR(address, Runtime1::arraycopy);
3140 // pass arguments: may push as this is not a safepoint; SP must be fix at each safepoint
3141 #ifdef _LP64
3142 // The arguments are in java calling convention so we can trivially shift them to C
3143 // convention
3144 assert_different_registers(c_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4);
3145 __ mov(c_rarg0, j_rarg0);
3146 assert_different_registers(c_rarg1, j_rarg2, j_rarg3, j_rarg4);
3147 __ mov(c_rarg1, j_rarg1);
3148 assert_different_registers(c_rarg2, j_rarg3, j_rarg4);
3149 __ mov(c_rarg2, j_rarg2);
3150 assert_different_registers(c_rarg3, j_rarg4);
3151 __ mov(c_rarg3, j_rarg3);
3152 #ifdef _WIN64
3153 // Allocate abi space for args but be sure to keep stack aligned
3154 __ subptr(rsp, 6*wordSize);
3155 store_parameter(j_rarg4, 4);
3156 __ call(RuntimeAddress(entry));
3157 __ addptr(rsp, 6*wordSize);
3158 #else
3159 __ mov(c_rarg4, j_rarg4);
3160 __ call(RuntimeAddress(entry));
3161 #endif // _WIN64
3162 #else
3163 __ push(length);
3164 __ push(dst_pos);
3165 __ push(dst);
3166 __ push(src_pos);
3167 __ push(src);
3168 __ call_VM_leaf(entry, 5); // removes pushed parameter from the stack
3170 #endif // _LP64
3172 __ cmpl(rax, 0);
3173 __ jcc(Assembler::equal, *stub->continuation());
3175 // Reload values from the stack so they are where the stub
3176 // expects them.
3177 __ movptr (dst, Address(rsp, 0*BytesPerWord));
3178 __ movptr (dst_pos, Address(rsp, 1*BytesPerWord));
3179 __ movptr (length, Address(rsp, 2*BytesPerWord));
3180 __ movptr (src_pos, Address(rsp, 3*BytesPerWord));
3181 __ movptr (src, Address(rsp, 4*BytesPerWord));
3182 __ jmp(*stub->entry());
3184 __ bind(*stub->continuation());
3185 return;
3186 }
3188 assert(default_type != NULL && default_type->is_array_klass() && default_type->is_loaded(), "must be true at this point");
3190 int elem_size = type2aelembytes(basic_type);
3191 int shift_amount;
3192 Address::ScaleFactor scale;
3194 switch (elem_size) {
3195 case 1 :
3196 shift_amount = 0;
3197 scale = Address::times_1;
3198 break;
3199 case 2 :
3200 shift_amount = 1;
3201 scale = Address::times_2;
3202 break;
3203 case 4 :
3204 shift_amount = 2;
3205 scale = Address::times_4;
3206 break;
3207 case 8 :
3208 shift_amount = 3;
3209 scale = Address::times_8;
3210 break;
3211 default:
3212 ShouldNotReachHere();
3213 }
3215 Address src_length_addr = Address(src, arrayOopDesc::length_offset_in_bytes());
3216 Address dst_length_addr = Address(dst, arrayOopDesc::length_offset_in_bytes());
3217 Address src_klass_addr = Address(src, oopDesc::klass_offset_in_bytes());
3218 Address dst_klass_addr = Address(dst, oopDesc::klass_offset_in_bytes());
3220 // length and pos's are all sign extended at this point on 64bit
3222 // test for NULL
3223 if (flags & LIR_OpArrayCopy::src_null_check) {
3224 __ testptr(src, src);
3225 __ jcc(Assembler::zero, *stub->entry());
3226 }
3227 if (flags & LIR_OpArrayCopy::dst_null_check) {
3228 __ testptr(dst, dst);
3229 __ jcc(Assembler::zero, *stub->entry());
3230 }
3232 // check if negative
3233 if (flags & LIR_OpArrayCopy::src_pos_positive_check) {
3234 __ testl(src_pos, src_pos);
3235 __ jcc(Assembler::less, *stub->entry());
3236 }
3237 if (flags & LIR_OpArrayCopy::dst_pos_positive_check) {
3238 __ testl(dst_pos, dst_pos);
3239 __ jcc(Assembler::less, *stub->entry());
3240 }
3241 if (flags & LIR_OpArrayCopy::length_positive_check) {
3242 __ testl(length, length);
3243 __ jcc(Assembler::less, *stub->entry());
3244 }
3246 if (flags & LIR_OpArrayCopy::src_range_check) {
3247 __ lea(tmp, Address(src_pos, length, Address::times_1, 0));
3248 __ cmpl(tmp, src_length_addr);
3249 __ jcc(Assembler::above, *stub->entry());
3250 }
3251 if (flags & LIR_OpArrayCopy::dst_range_check) {
3252 __ lea(tmp, Address(dst_pos, length, Address::times_1, 0));
3253 __ cmpl(tmp, dst_length_addr);
3254 __ jcc(Assembler::above, *stub->entry());
3255 }
3257 if (flags & LIR_OpArrayCopy::type_check) {
3258 if (UseCompressedOops) {
3259 __ movl(tmp, src_klass_addr);
3260 __ cmpl(tmp, dst_klass_addr);
3261 } else {
3262 __ movptr(tmp, src_klass_addr);
3263 __ cmpptr(tmp, dst_klass_addr);
3264 }
3265 __ jcc(Assembler::notEqual, *stub->entry());
3266 }
3268 #ifdef ASSERT
3269 if (basic_type != T_OBJECT || !(flags & LIR_OpArrayCopy::type_check)) {
3270 // Sanity check the known type with the incoming class. For the
3271 // primitive case the types must match exactly with src.klass and
3272 // dst.klass each exactly matching the default type. For the
3273 // object array case, if no type check is needed then either the
3274 // dst type is exactly the expected type and the src type is a
3275 // subtype which we can't check or src is the same array as dst
3276 // but not necessarily exactly of type default_type.
3277 Label known_ok, halt;
3278 __ movoop(tmp, default_type->constant_encoding());
3279 #ifdef _LP64
3280 if (UseCompressedOops) {
3281 __ encode_heap_oop(tmp);
3282 }
3283 #endif
3285 if (basic_type != T_OBJECT) {
3287 if (UseCompressedOops) __ cmpl(tmp, dst_klass_addr);
3288 else __ cmpptr(tmp, dst_klass_addr);
3289 __ jcc(Assembler::notEqual, halt);
3290 if (UseCompressedOops) __ cmpl(tmp, src_klass_addr);
3291 else __ cmpptr(tmp, src_klass_addr);
3292 __ jcc(Assembler::equal, known_ok);
3293 } else {
3294 if (UseCompressedOops) __ cmpl(tmp, dst_klass_addr);
3295 else __ cmpptr(tmp, dst_klass_addr);
3296 __ jcc(Assembler::equal, known_ok);
3297 __ cmpptr(src, dst);
3298 __ jcc(Assembler::equal, known_ok);
3299 }
3300 __ bind(halt);
3301 __ stop("incorrect type information in arraycopy");
3302 __ bind(known_ok);
3303 }
3304 #endif
3306 if (shift_amount > 0 && basic_type != T_OBJECT) {
3307 __ shlptr(length, shift_amount);
3308 }
3310 #ifdef _LP64
3311 assert_different_registers(c_rarg0, dst, dst_pos, length);
3312 __ movl2ptr(src_pos, src_pos); //higher 32bits must be null
3313 __ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3314 assert_different_registers(c_rarg1, length);
3315 __ movl2ptr(dst_pos, dst_pos); //higher 32bits must be null
3316 __ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3317 __ mov(c_rarg2, length);
3319 #else
3320 __ lea(tmp, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3321 store_parameter(tmp, 0);
3322 __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3323 store_parameter(tmp, 1);
3324 store_parameter(length, 2);
3325 #endif // _LP64
3326 if (basic_type == T_OBJECT) {
3327 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Runtime1::oop_arraycopy), 0);
3328 } else {
3329 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Runtime1::primitive_arraycopy), 0);
3330 }
3332 __ bind(*stub->continuation());
3333 }
3336 void LIR_Assembler::emit_lock(LIR_OpLock* op) {
3337 Register obj = op->obj_opr()->as_register(); // may not be an oop
3338 Register hdr = op->hdr_opr()->as_register();
3339 Register lock = op->lock_opr()->as_register();
3340 if (!UseFastLocking) {
3341 __ jmp(*op->stub()->entry());
3342 } else if (op->code() == lir_lock) {
3343 Register scratch = noreg;
3344 if (UseBiasedLocking) {
3345 scratch = op->scratch_opr()->as_register();
3346 }
3347 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
3348 // add debug info for NullPointerException only if one is possible
3349 int null_check_offset = __ lock_object(hdr, obj, lock, scratch, *op->stub()->entry());
3350 if (op->info() != NULL) {
3351 add_debug_info_for_null_check(null_check_offset, op->info());
3352 }
3353 // done
3354 } else if (op->code() == lir_unlock) {
3355 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
3356 __ unlock_object(hdr, obj, lock, *op->stub()->entry());
3357 } else {
3358 Unimplemented();
3359 }
3360 __ bind(*op->stub()->continuation());
3361 }
3364 void LIR_Assembler::emit_profile_call(LIR_OpProfileCall* op) {
3365 ciMethod* method = op->profiled_method();
3366 int bci = op->profiled_bci();
3368 // Update counter for all call types
3369 ciMethodData* md = method->method_data_or_null();
3370 assert(md != NULL, "Sanity");
3371 ciProfileData* data = md->bci_to_data(bci);
3372 assert(data->is_CounterData(), "need CounterData for calls");
3373 assert(op->mdo()->is_single_cpu(), "mdo must be allocated");
3374 Register mdo = op->mdo()->as_register();
3375 __ movoop(mdo, md->constant_encoding());
3376 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
3377 Bytecodes::Code bc = method->java_code_at_bci(bci);
3378 // Perform additional virtual call profiling for invokevirtual and
3379 // invokeinterface bytecodes
3380 if ((bc == Bytecodes::_invokevirtual || bc == Bytecodes::_invokeinterface) &&
3381 C1ProfileVirtualCalls) {
3382 assert(op->recv()->is_single_cpu(), "recv must be allocated");
3383 Register recv = op->recv()->as_register();
3384 assert_different_registers(mdo, recv);
3385 assert(data->is_VirtualCallData(), "need VirtualCallData for virtual calls");
3386 ciKlass* known_klass = op->known_holder();
3387 if (C1OptimizeVirtualCallProfiling && known_klass != NULL) {
3388 // We know the type that will be seen at this call site; we can
3389 // statically update the methodDataOop rather than needing to do
3390 // dynamic tests on the receiver type
3392 // NOTE: we should probably put a lock around this search to
3393 // avoid collisions by concurrent compilations
3394 ciVirtualCallData* vc_data = (ciVirtualCallData*) data;
3395 uint i;
3396 for (i = 0; i < VirtualCallData::row_limit(); i++) {
3397 ciKlass* receiver = vc_data->receiver(i);
3398 if (known_klass->equals(receiver)) {
3399 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i)));
3400 __ addptr(data_addr, DataLayout::counter_increment);
3401 return;
3402 }
3403 }
3405 // Receiver type not found in profile data; select an empty slot
3407 // Note that this is less efficient than it should be because it
3408 // always does a write to the receiver part of the
3409 // VirtualCallData rather than just the first time
3410 for (i = 0; i < VirtualCallData::row_limit(); i++) {
3411 ciKlass* receiver = vc_data->receiver(i);
3412 if (receiver == NULL) {
3413 Address recv_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_offset(i)));
3414 __ movoop(recv_addr, known_klass->constant_encoding());
3415 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i)));
3416 __ addptr(data_addr, DataLayout::counter_increment);
3417 return;
3418 }
3419 }
3420 } else {
3421 __ load_klass(recv, recv);
3422 Label update_done;
3423 type_profile_helper(mdo, md, data, recv, &update_done);
3424 // Receiver did not match any saved receiver and there is no empty row for it.
3425 // Increment total counter to indicate polymorphic case.
3426 __ addptr(counter_addr, DataLayout::counter_increment);
3428 __ bind(update_done);
3429 }
3430 } else {
3431 // Static call
3432 __ addptr(counter_addr, DataLayout::counter_increment);
3433 }
3434 }
3436 void LIR_Assembler::emit_delay(LIR_OpDelay*) {
3437 Unimplemented();
3438 }
3441 void LIR_Assembler::monitor_address(int monitor_no, LIR_Opr dst) {
3442 __ lea(dst->as_register(), frame_map()->address_for_monitor_lock(monitor_no));
3443 }
3446 void LIR_Assembler::align_backward_branch_target() {
3447 __ align(BytesPerWord);
3448 }
3451 void LIR_Assembler::negate(LIR_Opr left, LIR_Opr dest) {
3452 if (left->is_single_cpu()) {
3453 __ negl(left->as_register());
3454 move_regs(left->as_register(), dest->as_register());
3456 } else if (left->is_double_cpu()) {
3457 Register lo = left->as_register_lo();
3458 #ifdef _LP64
3459 Register dst = dest->as_register_lo();
3460 __ movptr(dst, lo);
3461 __ negptr(dst);
3462 #else
3463 Register hi = left->as_register_hi();
3464 __ lneg(hi, lo);
3465 if (dest->as_register_lo() == hi) {
3466 assert(dest->as_register_hi() != lo, "destroying register");
3467 move_regs(hi, dest->as_register_hi());
3468 move_regs(lo, dest->as_register_lo());
3469 } else {
3470 move_regs(lo, dest->as_register_lo());
3471 move_regs(hi, dest->as_register_hi());
3472 }
3473 #endif // _LP64
3475 } else if (dest->is_single_xmm()) {
3476 if (left->as_xmm_float_reg() != dest->as_xmm_float_reg()) {
3477 __ movflt(dest->as_xmm_float_reg(), left->as_xmm_float_reg());
3478 }
3479 __ xorps(dest->as_xmm_float_reg(),
3480 ExternalAddress((address)float_signflip_pool));
3482 } else if (dest->is_double_xmm()) {
3483 if (left->as_xmm_double_reg() != dest->as_xmm_double_reg()) {
3484 __ movdbl(dest->as_xmm_double_reg(), left->as_xmm_double_reg());
3485 }
3486 __ xorpd(dest->as_xmm_double_reg(),
3487 ExternalAddress((address)double_signflip_pool));
3489 } else if (left->is_single_fpu() || left->is_double_fpu()) {
3490 assert(left->fpu() == 0, "arg must be on TOS");
3491 assert(dest->fpu() == 0, "dest must be TOS");
3492 __ fchs();
3494 } else {
3495 ShouldNotReachHere();
3496 }
3497 }
3500 void LIR_Assembler::leal(LIR_Opr addr, LIR_Opr dest) {
3501 assert(addr->is_address() && dest->is_register(), "check");
3502 Register reg;
3503 reg = dest->as_pointer_register();
3504 __ lea(reg, as_Address(addr->as_address_ptr()));
3505 }
3509 void LIR_Assembler::rt_call(LIR_Opr result, address dest, const LIR_OprList* args, LIR_Opr tmp, CodeEmitInfo* info) {
3510 assert(!tmp->is_valid(), "don't need temporary");
3511 __ call(RuntimeAddress(dest));
3512 if (info != NULL) {
3513 add_call_info_here(info);
3514 }
3515 }
3518 void LIR_Assembler::volatile_move_op(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info) {
3519 assert(type == T_LONG, "only for volatile long fields");
3521 if (info != NULL) {
3522 add_debug_info_for_null_check_here(info);
3523 }
3525 if (src->is_double_xmm()) {
3526 if (dest->is_double_cpu()) {
3527 #ifdef _LP64
3528 __ movdq(dest->as_register_lo(), src->as_xmm_double_reg());
3529 #else
3530 __ movdl(dest->as_register_lo(), src->as_xmm_double_reg());
3531 __ psrlq(src->as_xmm_double_reg(), 32);
3532 __ movdl(dest->as_register_hi(), src->as_xmm_double_reg());
3533 #endif // _LP64
3534 } else if (dest->is_double_stack()) {
3535 __ movdbl(frame_map()->address_for_slot(dest->double_stack_ix()), src->as_xmm_double_reg());
3536 } else if (dest->is_address()) {
3537 __ movdbl(as_Address(dest->as_address_ptr()), src->as_xmm_double_reg());
3538 } else {
3539 ShouldNotReachHere();
3540 }
3542 } else if (dest->is_double_xmm()) {
3543 if (src->is_double_stack()) {
3544 __ movdbl(dest->as_xmm_double_reg(), frame_map()->address_for_slot(src->double_stack_ix()));
3545 } else if (src->is_address()) {
3546 __ movdbl(dest->as_xmm_double_reg(), as_Address(src->as_address_ptr()));
3547 } else {
3548 ShouldNotReachHere();
3549 }
3551 } else if (src->is_double_fpu()) {
3552 assert(src->fpu_regnrLo() == 0, "must be TOS");
3553 if (dest->is_double_stack()) {
3554 __ fistp_d(frame_map()->address_for_slot(dest->double_stack_ix()));
3555 } else if (dest->is_address()) {
3556 __ fistp_d(as_Address(dest->as_address_ptr()));
3557 } else {
3558 ShouldNotReachHere();
3559 }
3561 } else if (dest->is_double_fpu()) {
3562 assert(dest->fpu_regnrLo() == 0, "must be TOS");
3563 if (src->is_double_stack()) {
3564 __ fild_d(frame_map()->address_for_slot(src->double_stack_ix()));
3565 } else if (src->is_address()) {
3566 __ fild_d(as_Address(src->as_address_ptr()));
3567 } else {
3568 ShouldNotReachHere();
3569 }
3570 } else {
3571 ShouldNotReachHere();
3572 }
3573 }
3576 void LIR_Assembler::membar() {
3577 // QQQ sparc TSO uses this,
3578 __ membar( Assembler::Membar_mask_bits(Assembler::StoreLoad));
3579 }
3581 void LIR_Assembler::membar_acquire() {
3582 // No x86 machines currently require load fences
3583 // __ load_fence();
3584 }
3586 void LIR_Assembler::membar_release() {
3587 // No x86 machines currently require store fences
3588 // __ store_fence();
3589 }
3591 void LIR_Assembler::get_thread(LIR_Opr result_reg) {
3592 assert(result_reg->is_register(), "check");
3593 #ifdef _LP64
3594 // __ get_thread(result_reg->as_register_lo());
3595 __ mov(result_reg->as_register(), r15_thread);
3596 #else
3597 __ get_thread(result_reg->as_register());
3598 #endif // _LP64
3599 }
3602 void LIR_Assembler::peephole(LIR_List*) {
3603 // do nothing for now
3604 }
3607 #undef __
