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src/cpu/x86/vm/c1_LIRAssembler_x86.cpp@22e4420d19f7
src/cpu/x86/vm/c1_LIRAssembler_x86.cpp
Wed, 06 Oct 2010 14:18:32 -0700
- author
- kvn
- date
- Wed, 06 Oct 2010 14:18:32 -0700
- changeset 2187
- 22e4420d19f7
- parent 2163
- 5511edd5d719
- parent 2185
- a3f7f95b0165
- child 2203
- c393f046f4c5
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Merge
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 "incls/_precompiled.incl"
26 # include "incls/_c1_LIRAssembler_x86.cpp.incl"
29 // These masks are used to provide 128-bit aligned bitmasks to the XMM
30 // instructions, to allow sign-masking or sign-bit flipping. They allow
31 // fast versions of NegF/NegD and AbsF/AbsD.
33 // Note: 'double' and 'long long' have 32-bits alignment on x86.
34 static jlong* double_quadword(jlong *adr, jlong lo, jlong hi) {
35 // Use the expression (adr)&(~0xF) to provide 128-bits aligned address
36 // of 128-bits operands for SSE instructions.
37 jlong *operand = (jlong*)(((long)adr)&((long)(~0xF)));
38 // Store the value to a 128-bits operand.
39 operand[0] = lo;
40 operand[1] = hi;
41 return operand;
42 }
44 // Buffer for 128-bits masks used by SSE instructions.
45 static jlong fp_signmask_pool[(4+1)*2]; // 4*128bits(data) + 128bits(alignment)
47 // Static initialization during VM startup.
48 static jlong *float_signmask_pool = double_quadword(&fp_signmask_pool[1*2], CONST64(0x7FFFFFFF7FFFFFFF), CONST64(0x7FFFFFFF7FFFFFFF));
49 static jlong *double_signmask_pool = double_quadword(&fp_signmask_pool[2*2], CONST64(0x7FFFFFFFFFFFFFFF), CONST64(0x7FFFFFFFFFFFFFFF));
50 static jlong *float_signflip_pool = double_quadword(&fp_signmask_pool[3*2], CONST64(0x8000000080000000), CONST64(0x8000000080000000));
51 static jlong *double_signflip_pool = double_quadword(&fp_signmask_pool[4*2], CONST64(0x8000000000000000), CONST64(0x8000000000000000));
55 NEEDS_CLEANUP // remove this definitions ?
56 const Register IC_Klass = rax; // where the IC klass is cached
57 const Register SYNC_header = rax; // synchronization header
58 const Register SHIFT_count = rcx; // where count for shift operations must be
60 #define __ _masm->
63 static void select_different_registers(Register preserve,
64 Register extra,
65 Register &tmp1,
66 Register &tmp2) {
67 if (tmp1 == preserve) {
68 assert_different_registers(tmp1, tmp2, extra);
69 tmp1 = extra;
70 } else if (tmp2 == preserve) {
71 assert_different_registers(tmp1, tmp2, extra);
72 tmp2 = extra;
73 }
74 assert_different_registers(preserve, tmp1, tmp2);
75 }
79 static void select_different_registers(Register preserve,
80 Register extra,
81 Register &tmp1,
82 Register &tmp2,
83 Register &tmp3) {
84 if (tmp1 == preserve) {
85 assert_different_registers(tmp1, tmp2, tmp3, extra);
86 tmp1 = extra;
87 } else if (tmp2 == preserve) {
88 assert_different_registers(tmp1, tmp2, tmp3, extra);
89 tmp2 = extra;
90 } else if (tmp3 == preserve) {
91 assert_different_registers(tmp1, tmp2, tmp3, extra);
92 tmp3 = extra;
93 }
94 assert_different_registers(preserve, tmp1, tmp2, tmp3);
95 }
99 bool LIR_Assembler::is_small_constant(LIR_Opr opr) {
100 if (opr->is_constant()) {
101 LIR_Const* constant = opr->as_constant_ptr();
102 switch (constant->type()) {
103 case T_INT: {
104 return true;
105 }
107 default:
108 return false;
109 }
110 }
111 return false;
112 }
115 LIR_Opr LIR_Assembler::receiverOpr() {
116 return FrameMap::receiver_opr;
117 }
119 LIR_Opr LIR_Assembler::incomingReceiverOpr() {
120 return receiverOpr();
121 }
123 LIR_Opr LIR_Assembler::osrBufferPointer() {
124 return FrameMap::as_pointer_opr(receiverOpr()->as_register());
125 }
127 //--------------fpu register translations-----------------------
130 address LIR_Assembler::float_constant(float f) {
131 address const_addr = __ float_constant(f);
132 if (const_addr == NULL) {
133 bailout("const section overflow");
134 return __ code()->consts()->start();
135 } else {
136 return const_addr;
137 }
138 }
141 address LIR_Assembler::double_constant(double d) {
142 address const_addr = __ double_constant(d);
143 if (const_addr == NULL) {
144 bailout("const section overflow");
145 return __ code()->consts()->start();
146 } else {
147 return const_addr;
148 }
149 }
152 void LIR_Assembler::set_24bit_FPU() {
153 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_24()));
154 }
156 void LIR_Assembler::reset_FPU() {
157 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
158 }
160 void LIR_Assembler::fpop() {
161 __ fpop();
162 }
164 void LIR_Assembler::fxch(int i) {
165 __ fxch(i);
166 }
168 void LIR_Assembler::fld(int i) {
169 __ fld_s(i);
170 }
172 void LIR_Assembler::ffree(int i) {
173 __ ffree(i);
174 }
176 void LIR_Assembler::breakpoint() {
177 __ int3();
178 }
180 void LIR_Assembler::push(LIR_Opr opr) {
181 if (opr->is_single_cpu()) {
182 __ push_reg(opr->as_register());
183 } else if (opr->is_double_cpu()) {
184 NOT_LP64(__ push_reg(opr->as_register_hi()));
185 __ push_reg(opr->as_register_lo());
186 } else if (opr->is_stack()) {
187 __ push_addr(frame_map()->address_for_slot(opr->single_stack_ix()));
188 } else if (opr->is_constant()) {
189 LIR_Const* const_opr = opr->as_constant_ptr();
190 if (const_opr->type() == T_OBJECT) {
191 __ push_oop(const_opr->as_jobject());
192 } else if (const_opr->type() == T_INT) {
193 __ push_jint(const_opr->as_jint());
194 } else {
195 ShouldNotReachHere();
196 }
198 } else {
199 ShouldNotReachHere();
200 }
201 }
203 void LIR_Assembler::pop(LIR_Opr opr) {
204 if (opr->is_single_cpu()) {
205 __ pop_reg(opr->as_register());
206 } else {
207 ShouldNotReachHere();
208 }
209 }
211 bool LIR_Assembler::is_literal_address(LIR_Address* addr) {
212 return addr->base()->is_illegal() && addr->index()->is_illegal();
213 }
215 //-------------------------------------------
217 Address LIR_Assembler::as_Address(LIR_Address* addr) {
218 return as_Address(addr, rscratch1);
219 }
221 Address LIR_Assembler::as_Address(LIR_Address* addr, Register tmp) {
222 if (addr->base()->is_illegal()) {
223 assert(addr->index()->is_illegal(), "must be illegal too");
224 AddressLiteral laddr((address)addr->disp(), relocInfo::none);
225 if (! __ reachable(laddr)) {
226 __ movptr(tmp, laddr.addr());
227 Address res(tmp, 0);
228 return res;
229 } else {
230 return __ as_Address(laddr);
231 }
232 }
234 Register base = addr->base()->as_pointer_register();
236 if (addr->index()->is_illegal()) {
237 return Address( base, addr->disp());
238 } else if (addr->index()->is_cpu_register()) {
239 Register index = addr->index()->as_pointer_register();
240 return Address(base, index, (Address::ScaleFactor) addr->scale(), addr->disp());
241 } else if (addr->index()->is_constant()) {
242 intptr_t addr_offset = (addr->index()->as_constant_ptr()->as_jint() << addr->scale()) + addr->disp();
243 assert(Assembler::is_simm32(addr_offset), "must be");
245 return Address(base, addr_offset);
246 } else {
247 Unimplemented();
248 return Address();
249 }
250 }
253 Address LIR_Assembler::as_Address_hi(LIR_Address* addr) {
254 Address base = as_Address(addr);
255 return Address(base._base, base._index, base._scale, base._disp + BytesPerWord);
256 }
259 Address LIR_Assembler::as_Address_lo(LIR_Address* addr) {
260 return as_Address(addr);
261 }
264 void LIR_Assembler::osr_entry() {
265 offsets()->set_value(CodeOffsets::OSR_Entry, code_offset());
266 BlockBegin* osr_entry = compilation()->hir()->osr_entry();
267 ValueStack* entry_state = osr_entry->state();
268 int number_of_locks = entry_state->locks_size();
270 // we jump here if osr happens with the interpreter
271 // state set up to continue at the beginning of the
272 // loop that triggered osr - in particular, we have
273 // the following registers setup:
274 //
275 // rcx: osr buffer
276 //
278 // build frame
279 ciMethod* m = compilation()->method();
280 __ build_frame(initial_frame_size_in_bytes());
282 // OSR buffer is
283 //
284 // locals[nlocals-1..0]
285 // monitors[0..number_of_locks]
286 //
287 // locals is a direct copy of the interpreter frame so in the osr buffer
288 // so first slot in the local array is the last local from the interpreter
289 // and last slot is local[0] (receiver) from the interpreter
290 //
291 // Similarly with locks. The first lock slot in the osr buffer is the nth lock
292 // from the interpreter frame, the nth lock slot in the osr buffer is 0th lock
293 // in the interpreter frame (the method lock if a sync method)
295 // Initialize monitors in the compiled activation.
296 // rcx: pointer to osr buffer
297 //
298 // All other registers are dead at this point and the locals will be
299 // copied into place by code emitted in the IR.
301 Register OSR_buf = osrBufferPointer()->as_pointer_register();
302 { assert(frame::interpreter_frame_monitor_size() == BasicObjectLock::size(), "adjust code below");
303 int monitor_offset = BytesPerWord * method()->max_locals() +
304 (2 * BytesPerWord) * (number_of_locks - 1);
305 // SharedRuntime::OSR_migration_begin() packs BasicObjectLocks in
306 // the OSR buffer using 2 word entries: first the lock and then
307 // the oop.
308 for (int i = 0; i < number_of_locks; i++) {
309 int slot_offset = monitor_offset - ((i * 2) * BytesPerWord);
310 #ifdef ASSERT
311 // verify the interpreter's monitor has a non-null object
312 {
313 Label L;
314 __ cmpptr(Address(OSR_buf, slot_offset + 1*BytesPerWord), (int32_t)NULL_WORD);
315 __ jcc(Assembler::notZero, L);
316 __ stop("locked object is NULL");
317 __ bind(L);
318 }
319 #endif
320 __ movptr(rbx, Address(OSR_buf, slot_offset + 0));
321 __ movptr(frame_map()->address_for_monitor_lock(i), rbx);
322 __ movptr(rbx, Address(OSR_buf, slot_offset + 1*BytesPerWord));
323 __ movptr(frame_map()->address_for_monitor_object(i), rbx);
324 }
325 }
326 }
329 // inline cache check; done before the frame is built.
330 int LIR_Assembler::check_icache() {
331 Register receiver = FrameMap::receiver_opr->as_register();
332 Register ic_klass = IC_Klass;
333 const int ic_cmp_size = LP64_ONLY(10) NOT_LP64(9);
335 if (!VerifyOops) {
336 // insert some nops so that the verified entry point is aligned on CodeEntryAlignment
337 while ((__ offset() + ic_cmp_size) % CodeEntryAlignment != 0) {
338 __ nop();
339 }
340 }
341 int offset = __ offset();
342 __ inline_cache_check(receiver, IC_Klass);
343 assert(__ offset() % CodeEntryAlignment == 0 || VerifyOops, "alignment must be correct");
344 if (VerifyOops) {
345 // force alignment after the cache check.
346 // It's been verified to be aligned if !VerifyOops
347 __ align(CodeEntryAlignment);
348 }
349 return offset;
350 }
353 void LIR_Assembler::jobject2reg_with_patching(Register reg, CodeEmitInfo* info) {
354 jobject o = NULL;
355 PatchingStub* patch = new PatchingStub(_masm, PatchingStub::load_klass_id);
356 __ movoop(reg, o);
357 patching_epilog(patch, lir_patch_normal, reg, info);
358 }
361 void LIR_Assembler::monitorexit(LIR_Opr obj_opr, LIR_Opr lock_opr, Register new_hdr, int monitor_no, Register exception) {
362 if (exception->is_valid()) {
363 // preserve exception
364 // note: the monitor_exit runtime call is a leaf routine
365 // and cannot block => no GC can happen
366 // The slow case (MonitorAccessStub) uses the first two stack slots
367 // ([esp+0] and [esp+4]), therefore we store the exception at [esp+8]
368 __ movptr (Address(rsp, 2*wordSize), exception);
369 }
371 Register obj_reg = obj_opr->as_register();
372 Register lock_reg = lock_opr->as_register();
374 // setup registers (lock_reg must be rax, for lock_object)
375 assert(obj_reg != SYNC_header && lock_reg != SYNC_header, "rax, must be available here");
376 Register hdr = lock_reg;
377 assert(new_hdr == SYNC_header, "wrong register");
378 lock_reg = new_hdr;
379 // compute pointer to BasicLock
380 Address lock_addr = frame_map()->address_for_monitor_lock(monitor_no);
381 __ lea(lock_reg, lock_addr);
382 // unlock object
383 MonitorAccessStub* slow_case = new MonitorExitStub(lock_opr, true, monitor_no);
384 // _slow_case_stubs->append(slow_case);
385 // temporary fix: must be created after exceptionhandler, therefore as call stub
386 _slow_case_stubs->append(slow_case);
387 if (UseFastLocking) {
388 // try inlined fast unlocking first, revert to slow locking if it fails
389 // note: lock_reg points to the displaced header since the displaced header offset is 0!
390 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
391 __ unlock_object(hdr, obj_reg, lock_reg, *slow_case->entry());
392 } else {
393 // always do slow unlocking
394 // note: the slow unlocking code could be inlined here, however if we use
395 // slow unlocking, speed doesn't matter anyway and this solution is
396 // simpler and requires less duplicated code - additionally, the
397 // slow unlocking code is the same in either case which simplifies
398 // debugging
399 __ jmp(*slow_case->entry());
400 }
401 // done
402 __ bind(*slow_case->continuation());
404 if (exception->is_valid()) {
405 // restore exception
406 __ movptr (exception, Address(rsp, 2 * wordSize));
407 }
408 }
410 // This specifies the rsp decrement needed to build the frame
411 int LIR_Assembler::initial_frame_size_in_bytes() {
412 // if rounding, must let FrameMap know!
414 // The frame_map records size in slots (32bit word)
416 // subtract two words to account for return address and link
417 return (frame_map()->framesize() - (2*VMRegImpl::slots_per_word)) * VMRegImpl::stack_slot_size;
418 }
421 int LIR_Assembler::emit_exception_handler() {
422 // if the last instruction is a call (typically to do a throw which
423 // is coming at the end after block reordering) the return address
424 // must still point into the code area in order to avoid assertion
425 // failures when searching for the corresponding bci => add a nop
426 // (was bug 5/14/1999 - gri)
427 __ nop();
429 // generate code for exception handler
430 address handler_base = __ start_a_stub(exception_handler_size);
431 if (handler_base == NULL) {
432 // not enough space left for the handler
433 bailout("exception handler overflow");
434 return -1;
435 }
437 int offset = code_offset();
439 // the exception oop and pc are in rax, and rdx
440 // no other registers need to be preserved, so invalidate them
441 __ invalidate_registers(false, true, true, false, true, true);
443 // check that there is really an exception
444 __ verify_not_null_oop(rax);
446 // search an exception handler (rax: exception oop, rdx: throwing pc)
447 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::handle_exception_nofpu_id)));
449 __ stop("should not reach here");
451 assert(code_offset() - offset <= exception_handler_size, "overflow");
452 __ end_a_stub();
454 return offset;
455 }
458 // Emit the code to remove the frame from the stack in the exception
459 // unwind path.
460 int LIR_Assembler::emit_unwind_handler() {
461 #ifndef PRODUCT
462 if (CommentedAssembly) {
463 _masm->block_comment("Unwind handler");
464 }
465 #endif
467 int offset = code_offset();
469 // Fetch the exception from TLS and clear out exception related thread state
470 __ get_thread(rsi);
471 __ movptr(rax, Address(rsi, JavaThread::exception_oop_offset()));
472 __ movptr(Address(rsi, JavaThread::exception_oop_offset()), (int32_t)NULL_WORD);
473 __ movptr(Address(rsi, JavaThread::exception_pc_offset()), (int32_t)NULL_WORD);
475 __ bind(_unwind_handler_entry);
476 __ verify_not_null_oop(rax);
477 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
478 __ mov(rsi, rax); // Preserve the exception
479 }
481 // Preform needed unlocking
482 MonitorExitStub* stub = NULL;
483 if (method()->is_synchronized()) {
484 monitor_address(0, FrameMap::rax_opr);
485 stub = new MonitorExitStub(FrameMap::rax_opr, true, 0);
486 __ unlock_object(rdi, rbx, rax, *stub->entry());
487 __ bind(*stub->continuation());
488 }
490 if (compilation()->env()->dtrace_method_probes()) {
491 __ get_thread(rax);
492 __ movptr(Address(rsp, 0), rax);
493 __ movoop(Address(rsp, sizeof(void*)), method()->constant_encoding());
494 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit)));
495 }
497 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
498 __ mov(rax, rsi); // Restore the exception
499 }
501 // remove the activation and dispatch to the unwind handler
502 __ remove_frame(initial_frame_size_in_bytes());
503 __ jump(RuntimeAddress(Runtime1::entry_for(Runtime1::unwind_exception_id)));
505 // Emit the slow path assembly
506 if (stub != NULL) {
507 stub->emit_code(this);
508 }
510 return offset;
511 }
514 int LIR_Assembler::emit_deopt_handler() {
515 // if the last instruction is a call (typically to do a throw which
516 // is coming at the end after block reordering) the return address
517 // must still point into the code area in order to avoid assertion
518 // failures when searching for the corresponding bci => add a nop
519 // (was bug 5/14/1999 - gri)
520 __ nop();
522 // generate code for exception handler
523 address handler_base = __ start_a_stub(deopt_handler_size);
524 if (handler_base == NULL) {
525 // not enough space left for the handler
526 bailout("deopt handler overflow");
527 return -1;
528 }
530 int offset = code_offset();
531 InternalAddress here(__ pc());
533 __ pushptr(here.addr());
534 __ jump(RuntimeAddress(SharedRuntime::deopt_blob()->unpack()));
536 assert(code_offset() - offset <= deopt_handler_size, "overflow");
537 __ end_a_stub();
539 return offset;
540 }
543 // This is the fast version of java.lang.String.compare; it has not
544 // OSR-entry and therefore, we generate a slow version for OSR's
545 void LIR_Assembler::emit_string_compare(LIR_Opr arg0, LIR_Opr arg1, LIR_Opr dst, CodeEmitInfo* info) {
546 __ movptr (rbx, rcx); // receiver is in rcx
547 __ movptr (rax, arg1->as_register());
549 // Get addresses of first characters from both Strings
550 __ movptr (rsi, Address(rax, java_lang_String::value_offset_in_bytes()));
551 __ movptr (rcx, Address(rax, java_lang_String::offset_offset_in_bytes()));
552 __ lea (rsi, Address(rsi, rcx, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR)));
555 // rbx, may be NULL
556 add_debug_info_for_null_check_here(info);
557 __ movptr (rdi, Address(rbx, java_lang_String::value_offset_in_bytes()));
558 __ movptr (rcx, Address(rbx, java_lang_String::offset_offset_in_bytes()));
559 __ lea (rdi, Address(rdi, rcx, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR)));
561 // compute minimum length (in rax) and difference of lengths (on top of stack)
562 if (VM_Version::supports_cmov()) {
563 __ movl (rbx, Address(rbx, java_lang_String::count_offset_in_bytes()));
564 __ movl (rax, Address(rax, java_lang_String::count_offset_in_bytes()));
565 __ mov (rcx, rbx);
566 __ subptr (rbx, rax); // subtract lengths
567 __ push (rbx); // result
568 __ cmov (Assembler::lessEqual, rax, rcx);
569 } else {
570 Label L;
571 __ movl (rbx, Address(rbx, java_lang_String::count_offset_in_bytes()));
572 __ movl (rcx, Address(rax, java_lang_String::count_offset_in_bytes()));
573 __ mov (rax, rbx);
574 __ subptr (rbx, rcx);
575 __ push (rbx);
576 __ jcc (Assembler::lessEqual, L);
577 __ mov (rax, rcx);
578 __ bind (L);
579 }
580 // is minimum length 0?
581 Label noLoop, haveResult;
582 __ testptr (rax, rax);
583 __ jcc (Assembler::zero, noLoop);
585 // compare first characters
586 __ load_unsigned_short(rcx, Address(rdi, 0));
587 __ load_unsigned_short(rbx, Address(rsi, 0));
588 __ subl(rcx, rbx);
589 __ jcc(Assembler::notZero, haveResult);
590 // starting loop
591 __ decrement(rax); // we already tested index: skip one
592 __ jcc(Assembler::zero, noLoop);
594 // set rsi.edi to the end of the arrays (arrays have same length)
595 // negate the index
597 __ lea(rsi, Address(rsi, rax, Address::times_2, type2aelembytes(T_CHAR)));
598 __ lea(rdi, Address(rdi, rax, Address::times_2, type2aelembytes(T_CHAR)));
599 __ negptr(rax);
601 // compare the strings in a loop
603 Label loop;
604 __ align(wordSize);
605 __ bind(loop);
606 __ load_unsigned_short(rcx, Address(rdi, rax, Address::times_2, 0));
607 __ load_unsigned_short(rbx, Address(rsi, rax, Address::times_2, 0));
608 __ subl(rcx, rbx);
609 __ jcc(Assembler::notZero, haveResult);
610 __ increment(rax);
611 __ jcc(Assembler::notZero, loop);
613 // strings are equal up to min length
615 __ bind(noLoop);
616 __ pop(rax);
617 return_op(LIR_OprFact::illegalOpr);
619 __ bind(haveResult);
620 // leave instruction is going to discard the TOS value
621 __ mov (rax, rcx); // result of call is in rax,
622 }
625 void LIR_Assembler::return_op(LIR_Opr result) {
626 assert(result->is_illegal() || !result->is_single_cpu() || result->as_register() == rax, "word returns are in rax,");
627 if (!result->is_illegal() && result->is_float_kind() && !result->is_xmm_register()) {
628 assert(result->fpu() == 0, "result must already be on TOS");
629 }
631 // Pop the stack before the safepoint code
632 __ remove_frame(initial_frame_size_in_bytes());
634 bool result_is_oop = result->is_valid() ? result->is_oop() : false;
636 // Note: we do not need to round double result; float result has the right precision
637 // the poll sets the condition code, but no data registers
638 AddressLiteral polling_page(os::get_polling_page() + (SafepointPollOffset % os::vm_page_size()),
639 relocInfo::poll_return_type);
641 // NOTE: the requires that the polling page be reachable else the reloc
642 // goes to the movq that loads the address and not the faulting instruction
643 // which breaks the signal handler code
645 __ test32(rax, polling_page);
647 __ ret(0);
648 }
651 int LIR_Assembler::safepoint_poll(LIR_Opr tmp, CodeEmitInfo* info) {
652 AddressLiteral polling_page(os::get_polling_page() + (SafepointPollOffset % os::vm_page_size()),
653 relocInfo::poll_type);
655 if (info != NULL) {
656 add_debug_info_for_branch(info);
657 } else {
658 ShouldNotReachHere();
659 }
661 int offset = __ offset();
663 // NOTE: the requires that the polling page be reachable else the reloc
664 // goes to the movq that loads the address and not the faulting instruction
665 // which breaks the signal handler code
667 __ test32(rax, polling_page);
668 return offset;
669 }
672 void LIR_Assembler::move_regs(Register from_reg, Register to_reg) {
673 if (from_reg != to_reg) __ mov(to_reg, from_reg);
674 }
676 void LIR_Assembler::swap_reg(Register a, Register b) {
677 __ xchgptr(a, b);
678 }
681 void LIR_Assembler::const2reg(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) {
682 assert(src->is_constant(), "should not call otherwise");
683 assert(dest->is_register(), "should not call otherwise");
684 LIR_Const* c = src->as_constant_ptr();
686 switch (c->type()) {
687 case T_INT:
688 case T_ADDRESS: {
689 assert(patch_code == lir_patch_none, "no patching handled here");
690 __ movl(dest->as_register(), c->as_jint());
691 break;
692 }
694 case T_LONG: {
695 assert(patch_code == lir_patch_none, "no patching handled here");
696 #ifdef _LP64
697 __ movptr(dest->as_register_lo(), (intptr_t)c->as_jlong());
698 #else
699 __ movptr(dest->as_register_lo(), c->as_jint_lo());
700 __ movptr(dest->as_register_hi(), c->as_jint_hi());
701 #endif // _LP64
702 break;
703 }
705 case T_OBJECT: {
706 if (patch_code != lir_patch_none) {
707 jobject2reg_with_patching(dest->as_register(), info);
708 } else {
709 __ movoop(dest->as_register(), c->as_jobject());
710 }
711 break;
712 }
714 case T_FLOAT: {
715 if (dest->is_single_xmm()) {
716 if (c->is_zero_float()) {
717 __ xorps(dest->as_xmm_float_reg(), dest->as_xmm_float_reg());
718 } else {
719 __ movflt(dest->as_xmm_float_reg(),
720 InternalAddress(float_constant(c->as_jfloat())));
721 }
722 } else {
723 assert(dest->is_single_fpu(), "must be");
724 assert(dest->fpu_regnr() == 0, "dest must be TOS");
725 if (c->is_zero_float()) {
726 __ fldz();
727 } else if (c->is_one_float()) {
728 __ fld1();
729 } else {
730 __ fld_s (InternalAddress(float_constant(c->as_jfloat())));
731 }
732 }
733 break;
734 }
736 case T_DOUBLE: {
737 if (dest->is_double_xmm()) {
738 if (c->is_zero_double()) {
739 __ xorpd(dest->as_xmm_double_reg(), dest->as_xmm_double_reg());
740 } else {
741 __ movdbl(dest->as_xmm_double_reg(),
742 InternalAddress(double_constant(c->as_jdouble())));
743 }
744 } else {
745 assert(dest->is_double_fpu(), "must be");
746 assert(dest->fpu_regnrLo() == 0, "dest must be TOS");
747 if (c->is_zero_double()) {
748 __ fldz();
749 } else if (c->is_one_double()) {
750 __ fld1();
751 } else {
752 __ fld_d (InternalAddress(double_constant(c->as_jdouble())));
753 }
754 }
755 break;
756 }
758 default:
759 ShouldNotReachHere();
760 }
761 }
763 void LIR_Assembler::const2stack(LIR_Opr src, LIR_Opr dest) {
764 assert(src->is_constant(), "should not call otherwise");
765 assert(dest->is_stack(), "should not call otherwise");
766 LIR_Const* c = src->as_constant_ptr();
768 switch (c->type()) {
769 case T_INT: // fall through
770 case T_FLOAT:
771 case T_ADDRESS:
772 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits());
773 break;
775 case T_OBJECT:
776 __ movoop(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jobject());
777 break;
779 case T_LONG: // fall through
780 case T_DOUBLE:
781 #ifdef _LP64
782 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(),
783 lo_word_offset_in_bytes), (intptr_t)c->as_jlong_bits());
784 #else
785 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(),
786 lo_word_offset_in_bytes), c->as_jint_lo_bits());
787 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(),
788 hi_word_offset_in_bytes), c->as_jint_hi_bits());
789 #endif // _LP64
790 break;
792 default:
793 ShouldNotReachHere();
794 }
795 }
797 void LIR_Assembler::const2mem(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info ) {
798 assert(src->is_constant(), "should not call otherwise");
799 assert(dest->is_address(), "should not call otherwise");
800 LIR_Const* c = src->as_constant_ptr();
801 LIR_Address* addr = dest->as_address_ptr();
803 int null_check_here = code_offset();
804 switch (type) {
805 case T_INT: // fall through
806 case T_FLOAT:
807 case T_ADDRESS:
808 __ movl(as_Address(addr), c->as_jint_bits());
809 break;
811 case T_OBJECT: // fall through
812 case T_ARRAY:
813 if (c->as_jobject() == NULL) {
814 __ movptr(as_Address(addr), NULL_WORD);
815 } else {
816 if (is_literal_address(addr)) {
817 ShouldNotReachHere();
818 __ movoop(as_Address(addr, noreg), c->as_jobject());
819 } else {
820 #ifdef _LP64
821 __ movoop(rscratch1, c->as_jobject());
822 null_check_here = code_offset();
823 __ movptr(as_Address_lo(addr), rscratch1);
824 #else
825 __ movoop(as_Address(addr), c->as_jobject());
826 #endif
827 }
828 }
829 break;
831 case T_LONG: // fall through
832 case T_DOUBLE:
833 #ifdef _LP64
834 if (is_literal_address(addr)) {
835 ShouldNotReachHere();
836 __ movptr(as_Address(addr, r15_thread), (intptr_t)c->as_jlong_bits());
837 } else {
838 __ movptr(r10, (intptr_t)c->as_jlong_bits());
839 null_check_here = code_offset();
840 __ movptr(as_Address_lo(addr), r10);
841 }
842 #else
843 // Always reachable in 32bit so this doesn't produce useless move literal
844 __ movptr(as_Address_hi(addr), c->as_jint_hi_bits());
845 __ movptr(as_Address_lo(addr), c->as_jint_lo_bits());
846 #endif // _LP64
847 break;
849 case T_BOOLEAN: // fall through
850 case T_BYTE:
851 __ movb(as_Address(addr), c->as_jint() & 0xFF);
852 break;
854 case T_CHAR: // fall through
855 case T_SHORT:
856 __ movw(as_Address(addr), c->as_jint() & 0xFFFF);
857 break;
859 default:
860 ShouldNotReachHere();
861 };
863 if (info != NULL) {
864 add_debug_info_for_null_check(null_check_here, info);
865 }
866 }
869 void LIR_Assembler::reg2reg(LIR_Opr src, LIR_Opr dest) {
870 assert(src->is_register(), "should not call otherwise");
871 assert(dest->is_register(), "should not call otherwise");
873 // move between cpu-registers
874 if (dest->is_single_cpu()) {
875 #ifdef _LP64
876 if (src->type() == T_LONG) {
877 // Can do LONG -> OBJECT
878 move_regs(src->as_register_lo(), dest->as_register());
879 return;
880 }
881 #endif
882 assert(src->is_single_cpu(), "must match");
883 if (src->type() == T_OBJECT) {
884 __ verify_oop(src->as_register());
885 }
886 move_regs(src->as_register(), dest->as_register());
888 } else if (dest->is_double_cpu()) {
889 #ifdef _LP64
890 if (src->type() == T_OBJECT || src->type() == T_ARRAY) {
891 // Surprising to me but we can see move of a long to t_object
892 __ verify_oop(src->as_register());
893 move_regs(src->as_register(), dest->as_register_lo());
894 return;
895 }
896 #endif
897 assert(src->is_double_cpu(), "must match");
898 Register f_lo = src->as_register_lo();
899 Register f_hi = src->as_register_hi();
900 Register t_lo = dest->as_register_lo();
901 Register t_hi = dest->as_register_hi();
902 #ifdef _LP64
903 assert(f_hi == f_lo, "must be same");
904 assert(t_hi == t_lo, "must be same");
905 move_regs(f_lo, t_lo);
906 #else
907 assert(f_lo != f_hi && t_lo != t_hi, "invalid register allocation");
910 if (f_lo == t_hi && f_hi == t_lo) {
911 swap_reg(f_lo, f_hi);
912 } else if (f_hi == t_lo) {
913 assert(f_lo != t_hi, "overwriting register");
914 move_regs(f_hi, t_hi);
915 move_regs(f_lo, t_lo);
916 } else {
917 assert(f_hi != t_lo, "overwriting register");
918 move_regs(f_lo, t_lo);
919 move_regs(f_hi, t_hi);
920 }
921 #endif // LP64
923 // special moves from fpu-register to xmm-register
924 // necessary for method results
925 } else if (src->is_single_xmm() && !dest->is_single_xmm()) {
926 __ movflt(Address(rsp, 0), src->as_xmm_float_reg());
927 __ fld_s(Address(rsp, 0));
928 } else if (src->is_double_xmm() && !dest->is_double_xmm()) {
929 __ movdbl(Address(rsp, 0), src->as_xmm_double_reg());
930 __ fld_d(Address(rsp, 0));
931 } else if (dest->is_single_xmm() && !src->is_single_xmm()) {
932 __ fstp_s(Address(rsp, 0));
933 __ movflt(dest->as_xmm_float_reg(), Address(rsp, 0));
934 } else if (dest->is_double_xmm() && !src->is_double_xmm()) {
935 __ fstp_d(Address(rsp, 0));
936 __ movdbl(dest->as_xmm_double_reg(), Address(rsp, 0));
938 // move between xmm-registers
939 } else if (dest->is_single_xmm()) {
940 assert(src->is_single_xmm(), "must match");
941 __ movflt(dest->as_xmm_float_reg(), src->as_xmm_float_reg());
942 } else if (dest->is_double_xmm()) {
943 assert(src->is_double_xmm(), "must match");
944 __ movdbl(dest->as_xmm_double_reg(), src->as_xmm_double_reg());
946 // move between fpu-registers (no instruction necessary because of fpu-stack)
947 } else if (dest->is_single_fpu() || dest->is_double_fpu()) {
948 assert(src->is_single_fpu() || src->is_double_fpu(), "must match");
949 assert(src->fpu() == dest->fpu(), "currently should be nothing to do");
950 } else {
951 ShouldNotReachHere();
952 }
953 }
955 void LIR_Assembler::reg2stack(LIR_Opr src, LIR_Opr dest, BasicType type, bool pop_fpu_stack) {
956 assert(src->is_register(), "should not call otherwise");
957 assert(dest->is_stack(), "should not call otherwise");
959 if (src->is_single_cpu()) {
960 Address dst = frame_map()->address_for_slot(dest->single_stack_ix());
961 if (type == T_OBJECT || type == T_ARRAY) {
962 __ verify_oop(src->as_register());
963 __ movptr (dst, src->as_register());
964 } else {
965 __ movl (dst, src->as_register());
966 }
968 } else if (src->is_double_cpu()) {
969 Address dstLO = frame_map()->address_for_slot(dest->double_stack_ix(), lo_word_offset_in_bytes);
970 Address dstHI = frame_map()->address_for_slot(dest->double_stack_ix(), hi_word_offset_in_bytes);
971 __ movptr (dstLO, src->as_register_lo());
972 NOT_LP64(__ movptr (dstHI, src->as_register_hi()));
974 } else if (src->is_single_xmm()) {
975 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix());
976 __ movflt(dst_addr, src->as_xmm_float_reg());
978 } else if (src->is_double_xmm()) {
979 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix());
980 __ movdbl(dst_addr, src->as_xmm_double_reg());
982 } else if (src->is_single_fpu()) {
983 assert(src->fpu_regnr() == 0, "argument must be on TOS");
984 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix());
985 if (pop_fpu_stack) __ fstp_s (dst_addr);
986 else __ fst_s (dst_addr);
988 } else if (src->is_double_fpu()) {
989 assert(src->fpu_regnrLo() == 0, "argument must be on TOS");
990 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix());
991 if (pop_fpu_stack) __ fstp_d (dst_addr);
992 else __ fst_d (dst_addr);
994 } else {
995 ShouldNotReachHere();
996 }
997 }
1000 void LIR_Assembler::reg2mem(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool pop_fpu_stack, bool /* unaligned */) {
1001 LIR_Address* to_addr = dest->as_address_ptr();
1002 PatchingStub* patch = NULL;
1004 if (type == T_ARRAY || type == T_OBJECT) {
1005 __ verify_oop(src->as_register());
1006 }
1007 if (patch_code != lir_patch_none) {
1008 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1009 Address toa = as_Address(to_addr);
1010 assert(toa.disp() != 0, "must have");
1011 }
1012 if (info != NULL) {
1013 add_debug_info_for_null_check_here(info);
1014 }
1016 switch (type) {
1017 case T_FLOAT: {
1018 if (src->is_single_xmm()) {
1019 __ movflt(as_Address(to_addr), src->as_xmm_float_reg());
1020 } else {
1021 assert(src->is_single_fpu(), "must be");
1022 assert(src->fpu_regnr() == 0, "argument must be on TOS");
1023 if (pop_fpu_stack) __ fstp_s(as_Address(to_addr));
1024 else __ fst_s (as_Address(to_addr));
1025 }
1026 break;
1027 }
1029 case T_DOUBLE: {
1030 if (src->is_double_xmm()) {
1031 __ movdbl(as_Address(to_addr), src->as_xmm_double_reg());
1032 } else {
1033 assert(src->is_double_fpu(), "must be");
1034 assert(src->fpu_regnrLo() == 0, "argument must be on TOS");
1035 if (pop_fpu_stack) __ fstp_d(as_Address(to_addr));
1036 else __ fst_d (as_Address(to_addr));
1037 }
1038 break;
1039 }
1041 case T_ADDRESS: // fall through
1042 case T_ARRAY: // fall through
1043 case T_OBJECT: // fall through
1044 #ifdef _LP64
1045 __ movptr(as_Address(to_addr), src->as_register());
1046 break;
1047 #endif // _LP64
1048 case T_INT:
1049 __ movl(as_Address(to_addr), src->as_register());
1050 break;
1052 case T_LONG: {
1053 Register from_lo = src->as_register_lo();
1054 Register from_hi = src->as_register_hi();
1055 #ifdef _LP64
1056 __ movptr(as_Address_lo(to_addr), from_lo);
1057 #else
1058 Register base = to_addr->base()->as_register();
1059 Register index = noreg;
1060 if (to_addr->index()->is_register()) {
1061 index = to_addr->index()->as_register();
1062 }
1063 if (base == from_lo || index == from_lo) {
1064 assert(base != from_hi, "can't be");
1065 assert(index == noreg || (index != base && index != from_hi), "can't handle this");
1066 __ movl(as_Address_hi(to_addr), from_hi);
1067 if (patch != NULL) {
1068 patching_epilog(patch, lir_patch_high, base, info);
1069 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1070 patch_code = lir_patch_low;
1071 }
1072 __ movl(as_Address_lo(to_addr), from_lo);
1073 } else {
1074 assert(index == noreg || (index != base && index != from_lo), "can't handle this");
1075 __ movl(as_Address_lo(to_addr), from_lo);
1076 if (patch != NULL) {
1077 patching_epilog(patch, lir_patch_low, base, info);
1078 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1079 patch_code = lir_patch_high;
1080 }
1081 __ movl(as_Address_hi(to_addr), from_hi);
1082 }
1083 #endif // _LP64
1084 break;
1085 }
1087 case T_BYTE: // fall through
1088 case T_BOOLEAN: {
1089 Register src_reg = src->as_register();
1090 Address dst_addr = as_Address(to_addr);
1091 assert(VM_Version::is_P6() || src_reg->has_byte_register(), "must use byte registers if not P6");
1092 __ movb(dst_addr, src_reg);
1093 break;
1094 }
1096 case T_CHAR: // fall through
1097 case T_SHORT:
1098 __ movw(as_Address(to_addr), src->as_register());
1099 break;
1101 default:
1102 ShouldNotReachHere();
1103 }
1105 if (patch_code != lir_patch_none) {
1106 patching_epilog(patch, patch_code, to_addr->base()->as_register(), info);
1107 }
1108 }
1111 void LIR_Assembler::stack2reg(LIR_Opr src, LIR_Opr dest, BasicType type) {
1112 assert(src->is_stack(), "should not call otherwise");
1113 assert(dest->is_register(), "should not call otherwise");
1115 if (dest->is_single_cpu()) {
1116 if (type == T_ARRAY || type == T_OBJECT) {
1117 __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()));
1118 __ verify_oop(dest->as_register());
1119 } else {
1120 __ movl(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()));
1121 }
1123 } else if (dest->is_double_cpu()) {
1124 Address src_addr_LO = frame_map()->address_for_slot(src->double_stack_ix(), lo_word_offset_in_bytes);
1125 Address src_addr_HI = frame_map()->address_for_slot(src->double_stack_ix(), hi_word_offset_in_bytes);
1126 __ movptr(dest->as_register_lo(), src_addr_LO);
1127 NOT_LP64(__ movptr(dest->as_register_hi(), src_addr_HI));
1129 } else if (dest->is_single_xmm()) {
1130 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix());
1131 __ movflt(dest->as_xmm_float_reg(), src_addr);
1133 } else if (dest->is_double_xmm()) {
1134 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix());
1135 __ movdbl(dest->as_xmm_double_reg(), src_addr);
1137 } else if (dest->is_single_fpu()) {
1138 assert(dest->fpu_regnr() == 0, "dest must be TOS");
1139 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix());
1140 __ fld_s(src_addr);
1142 } else if (dest->is_double_fpu()) {
1143 assert(dest->fpu_regnrLo() == 0, "dest must be TOS");
1144 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix());
1145 __ fld_d(src_addr);
1147 } else {
1148 ShouldNotReachHere();
1149 }
1150 }
1153 void LIR_Assembler::stack2stack(LIR_Opr src, LIR_Opr dest, BasicType type) {
1154 if (src->is_single_stack()) {
1155 if (type == T_OBJECT || type == T_ARRAY) {
1156 __ pushptr(frame_map()->address_for_slot(src ->single_stack_ix()));
1157 __ popptr (frame_map()->address_for_slot(dest->single_stack_ix()));
1158 } else {
1159 #ifndef _LP64
1160 __ pushl(frame_map()->address_for_slot(src ->single_stack_ix()));
1161 __ popl (frame_map()->address_for_slot(dest->single_stack_ix()));
1162 #else
1163 //no pushl on 64bits
1164 __ movl(rscratch1, frame_map()->address_for_slot(src ->single_stack_ix()));
1165 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), rscratch1);
1166 #endif
1167 }
1169 } else if (src->is_double_stack()) {
1170 #ifdef _LP64
1171 __ pushptr(frame_map()->address_for_slot(src ->double_stack_ix()));
1172 __ popptr (frame_map()->address_for_slot(dest->double_stack_ix()));
1173 #else
1174 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 0));
1175 // push and pop the part at src + wordSize, adding wordSize for the previous push
1176 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 2 * wordSize));
1177 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 2 * wordSize));
1178 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 0));
1179 #endif // _LP64
1181 } else {
1182 ShouldNotReachHere();
1183 }
1184 }
1187 void LIR_Assembler::mem2reg(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool /* unaligned */) {
1188 assert(src->is_address(), "should not call otherwise");
1189 assert(dest->is_register(), "should not call otherwise");
1191 LIR_Address* addr = src->as_address_ptr();
1192 Address from_addr = as_Address(addr);
1194 switch (type) {
1195 case T_BOOLEAN: // fall through
1196 case T_BYTE: // fall through
1197 case T_CHAR: // fall through
1198 case T_SHORT:
1199 if (!VM_Version::is_P6() && !from_addr.uses(dest->as_register())) {
1200 // on pre P6 processors we may get partial register stalls
1201 // so blow away the value of to_rinfo before loading a
1202 // partial word into it. Do it here so that it precedes
1203 // the potential patch point below.
1204 __ xorptr(dest->as_register(), dest->as_register());
1205 }
1206 break;
1207 }
1209 PatchingStub* patch = NULL;
1210 if (patch_code != lir_patch_none) {
1211 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1212 assert(from_addr.disp() != 0, "must have");
1213 }
1214 if (info != NULL) {
1215 add_debug_info_for_null_check_here(info);
1216 }
1218 switch (type) {
1219 case T_FLOAT: {
1220 if (dest->is_single_xmm()) {
1221 __ movflt(dest->as_xmm_float_reg(), from_addr);
1222 } else {
1223 assert(dest->is_single_fpu(), "must be");
1224 assert(dest->fpu_regnr() == 0, "dest must be TOS");
1225 __ fld_s(from_addr);
1226 }
1227 break;
1228 }
1230 case T_DOUBLE: {
1231 if (dest->is_double_xmm()) {
1232 __ movdbl(dest->as_xmm_double_reg(), from_addr);
1233 } else {
1234 assert(dest->is_double_fpu(), "must be");
1235 assert(dest->fpu_regnrLo() == 0, "dest must be TOS");
1236 __ fld_d(from_addr);
1237 }
1238 break;
1239 }
1241 case T_ADDRESS: // fall through
1242 case T_OBJECT: // fall through
1243 case T_ARRAY: // fall through
1244 #ifdef _LP64
1245 __ movptr(dest->as_register(), from_addr);
1246 break;
1247 #endif // _L64
1248 case T_INT:
1249 __ movl(dest->as_register(), from_addr);
1250 break;
1252 case T_LONG: {
1253 Register to_lo = dest->as_register_lo();
1254 Register to_hi = dest->as_register_hi();
1255 #ifdef _LP64
1256 __ movptr(to_lo, as_Address_lo(addr));
1257 #else
1258 Register base = addr->base()->as_register();
1259 Register index = noreg;
1260 if (addr->index()->is_register()) {
1261 index = addr->index()->as_register();
1262 }
1263 if ((base == to_lo && index == to_hi) ||
1264 (base == to_hi && index == to_lo)) {
1265 // addresses with 2 registers are only formed as a result of
1266 // array access so this code will never have to deal with
1267 // patches or null checks.
1268 assert(info == NULL && patch == NULL, "must be");
1269 __ lea(to_hi, as_Address(addr));
1270 __ movl(to_lo, Address(to_hi, 0));
1271 __ movl(to_hi, Address(to_hi, BytesPerWord));
1272 } else if (base == to_lo || index == to_lo) {
1273 assert(base != to_hi, "can't be");
1274 assert(index == noreg || (index != base && index != to_hi), "can't handle this");
1275 __ movl(to_hi, as_Address_hi(addr));
1276 if (patch != NULL) {
1277 patching_epilog(patch, lir_patch_high, base, info);
1278 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1279 patch_code = lir_patch_low;
1280 }
1281 __ movl(to_lo, as_Address_lo(addr));
1282 } else {
1283 assert(index == noreg || (index != base && index != to_lo), "can't handle this");
1284 __ movl(to_lo, as_Address_lo(addr));
1285 if (patch != NULL) {
1286 patching_epilog(patch, lir_patch_low, base, info);
1287 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1288 patch_code = lir_patch_high;
1289 }
1290 __ movl(to_hi, as_Address_hi(addr));
1291 }
1292 #endif // _LP64
1293 break;
1294 }
1296 case T_BOOLEAN: // fall through
1297 case T_BYTE: {
1298 Register dest_reg = dest->as_register();
1299 assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6");
1300 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) {
1301 __ movsbl(dest_reg, from_addr);
1302 } else {
1303 __ movb(dest_reg, from_addr);
1304 __ shll(dest_reg, 24);
1305 __ sarl(dest_reg, 24);
1306 }
1307 break;
1308 }
1310 case T_CHAR: {
1311 Register dest_reg = dest->as_register();
1312 assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6");
1313 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) {
1314 __ movzwl(dest_reg, from_addr);
1315 } else {
1316 __ movw(dest_reg, from_addr);
1317 }
1318 break;
1319 }
1321 case T_SHORT: {
1322 Register dest_reg = dest->as_register();
1323 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) {
1324 __ movswl(dest_reg, from_addr);
1325 } else {
1326 __ movw(dest_reg, from_addr);
1327 __ shll(dest_reg, 16);
1328 __ sarl(dest_reg, 16);
1329 }
1330 break;
1331 }
1333 default:
1334 ShouldNotReachHere();
1335 }
1337 if (patch != NULL) {
1338 patching_epilog(patch, patch_code, addr->base()->as_register(), info);
1339 }
1341 if (type == T_ARRAY || type == T_OBJECT) {
1342 __ verify_oop(dest->as_register());
1343 }
1344 }
1347 void LIR_Assembler::prefetchr(LIR_Opr src) {
1348 LIR_Address* addr = src->as_address_ptr();
1349 Address from_addr = as_Address(addr);
1351 if (VM_Version::supports_sse()) {
1352 switch (ReadPrefetchInstr) {
1353 case 0:
1354 __ prefetchnta(from_addr); break;
1355 case 1:
1356 __ prefetcht0(from_addr); break;
1357 case 2:
1358 __ prefetcht2(from_addr); break;
1359 default:
1360 ShouldNotReachHere(); break;
1361 }
1362 } else if (VM_Version::supports_3dnow()) {
1363 __ prefetchr(from_addr);
1364 }
1365 }
1368 void LIR_Assembler::prefetchw(LIR_Opr src) {
1369 LIR_Address* addr = src->as_address_ptr();
1370 Address from_addr = as_Address(addr);
1372 if (VM_Version::supports_sse()) {
1373 switch (AllocatePrefetchInstr) {
1374 case 0:
1375 __ prefetchnta(from_addr); break;
1376 case 1:
1377 __ prefetcht0(from_addr); break;
1378 case 2:
1379 __ prefetcht2(from_addr); break;
1380 case 3:
1381 __ prefetchw(from_addr); break;
1382 default:
1383 ShouldNotReachHere(); break;
1384 }
1385 } else if (VM_Version::supports_3dnow()) {
1386 __ prefetchw(from_addr);
1387 }
1388 }
1391 NEEDS_CLEANUP; // This could be static?
1392 Address::ScaleFactor LIR_Assembler::array_element_size(BasicType type) const {
1393 int elem_size = type2aelembytes(type);
1394 switch (elem_size) {
1395 case 1: return Address::times_1;
1396 case 2: return Address::times_2;
1397 case 4: return Address::times_4;
1398 case 8: return Address::times_8;
1399 }
1400 ShouldNotReachHere();
1401 return Address::no_scale;
1402 }
1405 void LIR_Assembler::emit_op3(LIR_Op3* op) {
1406 switch (op->code()) {
1407 case lir_idiv:
1408 case lir_irem:
1409 arithmetic_idiv(op->code(),
1410 op->in_opr1(),
1411 op->in_opr2(),
1412 op->in_opr3(),
1413 op->result_opr(),
1414 op->info());
1415 break;
1416 default: ShouldNotReachHere(); break;
1417 }
1418 }
1420 void LIR_Assembler::emit_opBranch(LIR_OpBranch* op) {
1421 #ifdef ASSERT
1422 assert(op->block() == NULL || op->block()->label() == op->label(), "wrong label");
1423 if (op->block() != NULL) _branch_target_blocks.append(op->block());
1424 if (op->ublock() != NULL) _branch_target_blocks.append(op->ublock());
1425 #endif
1427 if (op->cond() == lir_cond_always) {
1428 if (op->info() != NULL) add_debug_info_for_branch(op->info());
1429 __ jmp (*(op->label()));
1430 } else {
1431 Assembler::Condition acond = Assembler::zero;
1432 if (op->code() == lir_cond_float_branch) {
1433 assert(op->ublock() != NULL, "must have unordered successor");
1434 __ jcc(Assembler::parity, *(op->ublock()->label()));
1435 switch(op->cond()) {
1436 case lir_cond_equal: acond = Assembler::equal; break;
1437 case lir_cond_notEqual: acond = Assembler::notEqual; break;
1438 case lir_cond_less: acond = Assembler::below; break;
1439 case lir_cond_lessEqual: acond = Assembler::belowEqual; break;
1440 case lir_cond_greaterEqual: acond = Assembler::aboveEqual; break;
1441 case lir_cond_greater: acond = Assembler::above; break;
1442 default: ShouldNotReachHere();
1443 }
1444 } else {
1445 switch (op->cond()) {
1446 case lir_cond_equal: acond = Assembler::equal; break;
1447 case lir_cond_notEqual: acond = Assembler::notEqual; break;
1448 case lir_cond_less: acond = Assembler::less; break;
1449 case lir_cond_lessEqual: acond = Assembler::lessEqual; break;
1450 case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break;
1451 case lir_cond_greater: acond = Assembler::greater; break;
1452 case lir_cond_belowEqual: acond = Assembler::belowEqual; break;
1453 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; break;
1454 default: ShouldNotReachHere();
1455 }
1456 }
1457 __ jcc(acond,*(op->label()));
1458 }
1459 }
1461 void LIR_Assembler::emit_opConvert(LIR_OpConvert* op) {
1462 LIR_Opr src = op->in_opr();
1463 LIR_Opr dest = op->result_opr();
1465 switch (op->bytecode()) {
1466 case Bytecodes::_i2l:
1467 #ifdef _LP64
1468 __ movl2ptr(dest->as_register_lo(), src->as_register());
1469 #else
1470 move_regs(src->as_register(), dest->as_register_lo());
1471 move_regs(src->as_register(), dest->as_register_hi());
1472 __ sarl(dest->as_register_hi(), 31);
1473 #endif // LP64
1474 break;
1476 case Bytecodes::_l2i:
1477 move_regs(src->as_register_lo(), dest->as_register());
1478 break;
1480 case Bytecodes::_i2b:
1481 move_regs(src->as_register(), dest->as_register());
1482 __ sign_extend_byte(dest->as_register());
1483 break;
1485 case Bytecodes::_i2c:
1486 move_regs(src->as_register(), dest->as_register());
1487 __ andl(dest->as_register(), 0xFFFF);
1488 break;
1490 case Bytecodes::_i2s:
1491 move_regs(src->as_register(), dest->as_register());
1492 __ sign_extend_short(dest->as_register());
1493 break;
1496 case Bytecodes::_f2d:
1497 case Bytecodes::_d2f:
1498 if (dest->is_single_xmm()) {
1499 __ cvtsd2ss(dest->as_xmm_float_reg(), src->as_xmm_double_reg());
1500 } else if (dest->is_double_xmm()) {
1501 __ cvtss2sd(dest->as_xmm_double_reg(), src->as_xmm_float_reg());
1502 } else {
1503 assert(src->fpu() == dest->fpu(), "register must be equal");
1504 // do nothing (float result is rounded later through spilling)
1505 }
1506 break;
1508 case Bytecodes::_i2f:
1509 case Bytecodes::_i2d:
1510 if (dest->is_single_xmm()) {
1511 __ cvtsi2ssl(dest->as_xmm_float_reg(), src->as_register());
1512 } else if (dest->is_double_xmm()) {
1513 __ cvtsi2sdl(dest->as_xmm_double_reg(), src->as_register());
1514 } else {
1515 assert(dest->fpu() == 0, "result must be on TOS");
1516 __ movl(Address(rsp, 0), src->as_register());
1517 __ fild_s(Address(rsp, 0));
1518 }
1519 break;
1521 case Bytecodes::_f2i:
1522 case Bytecodes::_d2i:
1523 if (src->is_single_xmm()) {
1524 __ cvttss2sil(dest->as_register(), src->as_xmm_float_reg());
1525 } else if (src->is_double_xmm()) {
1526 __ cvttsd2sil(dest->as_register(), src->as_xmm_double_reg());
1527 } else {
1528 assert(src->fpu() == 0, "input must be on TOS");
1529 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_trunc()));
1530 __ fist_s(Address(rsp, 0));
1531 __ movl(dest->as_register(), Address(rsp, 0));
1532 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
1533 }
1535 // IA32 conversion instructions do not match JLS for overflow, underflow and NaN -> fixup in stub
1536 assert(op->stub() != NULL, "stub required");
1537 __ cmpl(dest->as_register(), 0x80000000);
1538 __ jcc(Assembler::equal, *op->stub()->entry());
1539 __ bind(*op->stub()->continuation());
1540 break;
1542 case Bytecodes::_l2f:
1543 case Bytecodes::_l2d:
1544 assert(!dest->is_xmm_register(), "result in xmm register not supported (no SSE instruction present)");
1545 assert(dest->fpu() == 0, "result must be on TOS");
1547 __ movptr(Address(rsp, 0), src->as_register_lo());
1548 NOT_LP64(__ movl(Address(rsp, BytesPerWord), src->as_register_hi()));
1549 __ fild_d(Address(rsp, 0));
1550 // float result is rounded later through spilling
1551 break;
1553 case Bytecodes::_f2l:
1554 case Bytecodes::_d2l:
1555 assert(!src->is_xmm_register(), "input in xmm register not supported (no SSE instruction present)");
1556 assert(src->fpu() == 0, "input must be on TOS");
1557 assert(dest == FrameMap::long0_opr, "runtime stub places result in these registers");
1559 // instruction sequence too long to inline it here
1560 {
1561 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::fpu2long_stub_id)));
1562 }
1563 break;
1565 default: ShouldNotReachHere();
1566 }
1567 }
1569 void LIR_Assembler::emit_alloc_obj(LIR_OpAllocObj* op) {
1570 if (op->init_check()) {
1571 __ cmpl(Address(op->klass()->as_register(),
1572 instanceKlass::init_state_offset_in_bytes() + sizeof(oopDesc)),
1573 instanceKlass::fully_initialized);
1574 add_debug_info_for_null_check_here(op->stub()->info());
1575 __ jcc(Assembler::notEqual, *op->stub()->entry());
1576 }
1577 __ allocate_object(op->obj()->as_register(),
1578 op->tmp1()->as_register(),
1579 op->tmp2()->as_register(),
1580 op->header_size(),
1581 op->object_size(),
1582 op->klass()->as_register(),
1583 *op->stub()->entry());
1584 __ bind(*op->stub()->continuation());
1585 }
1587 void LIR_Assembler::emit_alloc_array(LIR_OpAllocArray* op) {
1588 if (UseSlowPath ||
1589 (!UseFastNewObjectArray && (op->type() == T_OBJECT || op->type() == T_ARRAY)) ||
1590 (!UseFastNewTypeArray && (op->type() != T_OBJECT && op->type() != T_ARRAY))) {
1591 __ jmp(*op->stub()->entry());
1592 } else {
1593 Register len = op->len()->as_register();
1594 Register tmp1 = op->tmp1()->as_register();
1595 Register tmp2 = op->tmp2()->as_register();
1596 Register tmp3 = op->tmp3()->as_register();
1597 if (len == tmp1) {
1598 tmp1 = tmp3;
1599 } else if (len == tmp2) {
1600 tmp2 = tmp3;
1601 } else if (len == tmp3) {
1602 // everything is ok
1603 } else {
1604 __ mov(tmp3, len);
1605 }
1606 __ allocate_array(op->obj()->as_register(),
1607 len,
1608 tmp1,
1609 tmp2,
1610 arrayOopDesc::header_size(op->type()),
1611 array_element_size(op->type()),
1612 op->klass()->as_register(),
1613 *op->stub()->entry());
1614 }
1615 __ bind(*op->stub()->continuation());
1616 }
1618 void LIR_Assembler::type_profile_helper(Register mdo,
1619 ciMethodData *md, ciProfileData *data,
1620 Register recv, Label* update_done) {
1621 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) {
1622 Label next_test;
1623 // See if the receiver is receiver[n].
1624 __ cmpptr(recv, Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i))));
1625 __ jccb(Assembler::notEqual, next_test);
1626 Address data_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i)));
1627 __ addptr(data_addr, DataLayout::counter_increment);
1628 __ jmp(*update_done);
1629 __ bind(next_test);
1630 }
1632 // Didn't find receiver; find next empty slot and fill it in
1633 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) {
1634 Label next_test;
1635 Address recv_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i)));
1636 __ cmpptr(recv_addr, (intptr_t)NULL_WORD);
1637 __ jccb(Assembler::notEqual, next_test);
1638 __ movptr(recv_addr, recv);
1639 __ movptr(Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i))), DataLayout::counter_increment);
1640 __ jmp(*update_done);
1641 __ bind(next_test);
1642 }
1643 }
1645 void LIR_Assembler::emit_typecheck_helper(LIR_OpTypeCheck *op, Label* success, Label* failure, Label* obj_is_null) {
1646 // we always need a stub for the failure case.
1647 CodeStub* stub = op->stub();
1648 Register obj = op->object()->as_register();
1649 Register k_RInfo = op->tmp1()->as_register();
1650 Register klass_RInfo = op->tmp2()->as_register();
1651 Register dst = op->result_opr()->as_register();
1652 ciKlass* k = op->klass();
1653 Register Rtmp1 = noreg;
1655 // check if it needs to be profiled
1656 ciMethodData* md;
1657 ciProfileData* data;
1659 if (op->should_profile()) {
1660 ciMethod* method = op->profiled_method();
1661 assert(method != NULL, "Should have method");
1662 int bci = op->profiled_bci();
1663 md = method->method_data();
1664 if (md == NULL) {
1665 bailout("out of memory building methodDataOop");
1666 return;
1667 }
1668 data = md->bci_to_data(bci);
1669 assert(data != NULL, "need data for type check");
1670 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check");
1671 }
1672 Label profile_cast_success, profile_cast_failure;
1673 Label *success_target = op->should_profile() ? &profile_cast_success : success;
1674 Label *failure_target = op->should_profile() ? &profile_cast_failure : failure;
1676 if (obj == k_RInfo) {
1677 k_RInfo = dst;
1678 } else if (obj == klass_RInfo) {
1679 klass_RInfo = dst;
1680 }
1681 if (k->is_loaded()) {
1682 select_different_registers(obj, dst, k_RInfo, klass_RInfo);
1683 } else {
1684 Rtmp1 = op->tmp3()->as_register();
1685 select_different_registers(obj, dst, k_RInfo, klass_RInfo, Rtmp1);
1686 }
1688 assert_different_registers(obj, k_RInfo, klass_RInfo);
1689 if (!k->is_loaded()) {
1690 jobject2reg_with_patching(k_RInfo, op->info_for_patch());
1691 } else {
1692 #ifdef _LP64
1693 __ movoop(k_RInfo, k->constant_encoding());
1694 #endif // _LP64
1695 }
1696 assert(obj != k_RInfo, "must be different");
1698 __ cmpptr(obj, (int32_t)NULL_WORD);
1699 if (op->should_profile()) {
1700 Label not_null;
1701 __ jccb(Assembler::notEqual, not_null);
1702 // Object is null; update MDO and exit
1703 Register mdo = klass_RInfo;
1704 __ movoop(mdo, md->constant_encoding());
1705 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::header_offset()));
1706 int header_bits = DataLayout::flag_mask_to_header_mask(BitData::null_seen_byte_constant());
1707 __ orl(data_addr, header_bits);
1708 __ jmp(*obj_is_null);
1709 __ bind(not_null);
1710 } else {
1711 __ jcc(Assembler::equal, *obj_is_null);
1712 }
1713 __ verify_oop(obj);
1715 if (op->fast_check()) {
1716 // get object class
1717 // not a safepoint as obj null check happens earlier
1718 if (k->is_loaded()) {
1719 #ifdef _LP64
1720 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes()));
1721 #else
1722 __ cmpoop(Address(obj, oopDesc::klass_offset_in_bytes()), k->constant_encoding());
1723 #endif // _LP64
1724 } else {
1725 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes()));
1726 }
1727 __ jcc(Assembler::notEqual, *failure_target);
1728 // successful cast, fall through to profile or jump
1729 } else {
1730 // get object class
1731 // not a safepoint as obj null check happens earlier
1732 __ movptr(klass_RInfo, Address(obj, oopDesc::klass_offset_in_bytes()));
1733 if (k->is_loaded()) {
1734 // See if we get an immediate positive hit
1735 #ifdef _LP64
1736 __ cmpptr(k_RInfo, Address(klass_RInfo, k->super_check_offset()));
1737 #else
1738 __ cmpoop(Address(klass_RInfo, k->super_check_offset()), k->constant_encoding());
1739 #endif // _LP64
1740 if (sizeof(oopDesc) + Klass::secondary_super_cache_offset_in_bytes() != k->super_check_offset()) {
1741 __ jcc(Assembler::notEqual, *failure_target);
1742 // successful cast, fall through to profile or jump
1743 } else {
1744 // See if we get an immediate positive hit
1745 __ jcc(Assembler::equal, *success_target);
1746 // check for self
1747 #ifdef _LP64
1748 __ cmpptr(klass_RInfo, k_RInfo);
1749 #else
1750 __ cmpoop(klass_RInfo, k->constant_encoding());
1751 #endif // _LP64
1752 __ jcc(Assembler::equal, *success_target);
1754 __ push(klass_RInfo);
1755 #ifdef _LP64
1756 __ push(k_RInfo);
1757 #else
1758 __ pushoop(k->constant_encoding());
1759 #endif // _LP64
1760 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
1761 __ pop(klass_RInfo);
1762 __ pop(klass_RInfo);
1763 // result is a boolean
1764 __ cmpl(klass_RInfo, 0);
1765 __ jcc(Assembler::equal, *failure_target);
1766 // successful cast, fall through to profile or jump
1767 }
1768 } else {
1769 // perform the fast part of the checking logic
1770 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL);
1771 // call out-of-line instance of __ check_klass_subtype_slow_path(...):
1772 __ push(klass_RInfo);
1773 __ push(k_RInfo);
1774 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
1775 __ pop(klass_RInfo);
1776 __ pop(k_RInfo);
1777 // result is a boolean
1778 __ cmpl(k_RInfo, 0);
1779 __ jcc(Assembler::equal, *failure_target);
1780 // successful cast, fall through to profile or jump
1781 }
1782 }
1783 if (op->should_profile()) {
1784 Register mdo = klass_RInfo, recv = k_RInfo;
1785 __ bind(profile_cast_success);
1786 __ movoop(mdo, md->constant_encoding());
1787 __ movptr(recv, Address(obj, oopDesc::klass_offset_in_bytes()));
1788 Label update_done;
1789 type_profile_helper(mdo, md, data, recv, success);
1790 __ jmp(*success);
1792 __ bind(profile_cast_failure);
1793 __ movoop(mdo, md->constant_encoding());
1794 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
1795 __ subptr(counter_addr, DataLayout::counter_increment);
1796 __ jmp(*failure);
1797 }
1798 __ jmp(*success);
1799 }
1802 void LIR_Assembler::emit_opTypeCheck(LIR_OpTypeCheck* op) {
1803 LIR_Code code = op->code();
1804 if (code == lir_store_check) {
1805 Register value = op->object()->as_register();
1806 Register array = op->array()->as_register();
1807 Register k_RInfo = op->tmp1()->as_register();
1808 Register klass_RInfo = op->tmp2()->as_register();
1809 Register Rtmp1 = op->tmp3()->as_register();
1811 CodeStub* stub = op->stub();
1813 // check if it needs to be profiled
1814 ciMethodData* md;
1815 ciProfileData* data;
1817 if (op->should_profile()) {
1818 ciMethod* method = op->profiled_method();
1819 assert(method != NULL, "Should have method");
1820 int bci = op->profiled_bci();
1821 md = method->method_data();
1822 if (md == NULL) {
1823 bailout("out of memory building methodDataOop");
1824 return;
1825 }
1826 data = md->bci_to_data(bci);
1827 assert(data != NULL, "need data for type check");
1828 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check");
1829 }
1830 Label profile_cast_success, profile_cast_failure, done;
1831 Label *success_target = op->should_profile() ? &profile_cast_success : &done;
1832 Label *failure_target = op->should_profile() ? &profile_cast_failure : stub->entry();
1834 __ cmpptr(value, (int32_t)NULL_WORD);
1835 if (op->should_profile()) {
1836 Label not_null;
1837 __ jccb(Assembler::notEqual, not_null);
1838 // Object is null; update MDO and exit
1839 Register mdo = klass_RInfo;
1840 __ movoop(mdo, md->constant_encoding());
1841 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::header_offset()));
1842 int header_bits = DataLayout::flag_mask_to_header_mask(BitData::null_seen_byte_constant());
1843 __ orl(data_addr, header_bits);
1844 __ jmp(done);
1845 __ bind(not_null);
1846 } else {
1847 __ jcc(Assembler::equal, done);
1848 }
1850 add_debug_info_for_null_check_here(op->info_for_exception());
1851 __ movptr(k_RInfo, Address(array, oopDesc::klass_offset_in_bytes()));
1852 __ movptr(klass_RInfo, Address(value, oopDesc::klass_offset_in_bytes()));
1854 // get instance klass
1855 __ movptr(k_RInfo, Address(k_RInfo, objArrayKlass::element_klass_offset_in_bytes() + sizeof(oopDesc)));
1856 // perform the fast part of the checking logic
1857 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL);
1858 // call out-of-line instance of __ check_klass_subtype_slow_path(...):
1859 __ push(klass_RInfo);
1860 __ push(k_RInfo);
1861 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
1862 __ pop(klass_RInfo);
1863 __ pop(k_RInfo);
1864 // result is a boolean
1865 __ cmpl(k_RInfo, 0);
1866 __ jcc(Assembler::equal, *failure_target);
1867 // fall through to the success case
1869 if (op->should_profile()) {
1870 Register mdo = klass_RInfo, recv = k_RInfo;
1871 __ bind(profile_cast_success);
1872 __ movoop(mdo, md->constant_encoding());
1873 __ movptr(recv, Address(value, oopDesc::klass_offset_in_bytes()));
1874 Label update_done;
1875 type_profile_helper(mdo, md, data, recv, &done);
1876 __ jmpb(done);
1878 __ bind(profile_cast_failure);
1879 __ movoop(mdo, md->constant_encoding());
1880 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
1881 __ subptr(counter_addr, DataLayout::counter_increment);
1882 __ jmp(*stub->entry());
1883 }
1885 __ bind(done);
1886 } else
1887 if (code == lir_checkcast) {
1888 Register obj = op->object()->as_register();
1889 Register dst = op->result_opr()->as_register();
1890 Label success;
1891 emit_typecheck_helper(op, &success, op->stub()->entry(), &success);
1892 __ bind(success);
1893 if (dst != obj) {
1894 __ mov(dst, obj);
1895 }
1896 } else
1897 if (code == lir_instanceof) {
1898 Register obj = op->object()->as_register();
1899 Register dst = op->result_opr()->as_register();
1900 Label success, failure, done;
1901 emit_typecheck_helper(op, &success, &failure, &failure);
1902 __ bind(failure);
1903 __ xorptr(dst, dst);
1904 __ jmpb(done);
1905 __ bind(success);
1906 __ movptr(dst, 1);
1907 __ bind(done);
1908 } else {
1909 ShouldNotReachHere();
1910 }
1912 }
1915 void LIR_Assembler::emit_compare_and_swap(LIR_OpCompareAndSwap* op) {
1916 if (LP64_ONLY(false &&) op->code() == lir_cas_long && VM_Version::supports_cx8()) {
1917 assert(op->cmp_value()->as_register_lo() == rax, "wrong register");
1918 assert(op->cmp_value()->as_register_hi() == rdx, "wrong register");
1919 assert(op->new_value()->as_register_lo() == rbx, "wrong register");
1920 assert(op->new_value()->as_register_hi() == rcx, "wrong register");
1921 Register addr = op->addr()->as_register();
1922 if (os::is_MP()) {
1923 __ lock();
1924 }
1925 NOT_LP64(__ cmpxchg8(Address(addr, 0)));
1927 } else if (op->code() == lir_cas_int || op->code() == lir_cas_obj ) {
1928 NOT_LP64(assert(op->addr()->is_single_cpu(), "must be single");)
1929 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo());
1930 Register newval = op->new_value()->as_register();
1931 Register cmpval = op->cmp_value()->as_register();
1932 assert(cmpval == rax, "wrong register");
1933 assert(newval != NULL, "new val must be register");
1934 assert(cmpval != newval, "cmp and new values must be in different registers");
1935 assert(cmpval != addr, "cmp and addr must be in different registers");
1936 assert(newval != addr, "new value and addr must be in different registers");
1937 if (os::is_MP()) {
1938 __ lock();
1939 }
1940 if ( op->code() == lir_cas_obj) {
1941 __ cmpxchgptr(newval, Address(addr, 0));
1942 } else if (op->code() == lir_cas_int) {
1943 __ cmpxchgl(newval, Address(addr, 0));
1944 } else {
1945 LP64_ONLY(__ cmpxchgq(newval, Address(addr, 0)));
1946 }
1947 #ifdef _LP64
1948 } else if (op->code() == lir_cas_long) {
1949 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo());
1950 Register newval = op->new_value()->as_register_lo();
1951 Register cmpval = op->cmp_value()->as_register_lo();
1952 assert(cmpval == rax, "wrong register");
1953 assert(newval != NULL, "new val must be register");
1954 assert(cmpval != newval, "cmp and new values must be in different registers");
1955 assert(cmpval != addr, "cmp and addr must be in different registers");
1956 assert(newval != addr, "new value and addr must be in different registers");
1957 if (os::is_MP()) {
1958 __ lock();
1959 }
1960 __ cmpxchgq(newval, Address(addr, 0));
1961 #endif // _LP64
1962 } else {
1963 Unimplemented();
1964 }
1965 }
1967 void LIR_Assembler::cmove(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result) {
1968 Assembler::Condition acond, ncond;
1969 switch (condition) {
1970 case lir_cond_equal: acond = Assembler::equal; ncond = Assembler::notEqual; break;
1971 case lir_cond_notEqual: acond = Assembler::notEqual; ncond = Assembler::equal; break;
1972 case lir_cond_less: acond = Assembler::less; ncond = Assembler::greaterEqual; break;
1973 case lir_cond_lessEqual: acond = Assembler::lessEqual; ncond = Assembler::greater; break;
1974 case lir_cond_greaterEqual: acond = Assembler::greaterEqual; ncond = Assembler::less; break;
1975 case lir_cond_greater: acond = Assembler::greater; ncond = Assembler::lessEqual; break;
1976 case lir_cond_belowEqual: acond = Assembler::belowEqual; ncond = Assembler::above; break;
1977 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; ncond = Assembler::below; break;
1978 default: ShouldNotReachHere();
1979 }
1981 if (opr1->is_cpu_register()) {
1982 reg2reg(opr1, result);
1983 } else if (opr1->is_stack()) {
1984 stack2reg(opr1, result, result->type());
1985 } else if (opr1->is_constant()) {
1986 const2reg(opr1, result, lir_patch_none, NULL);
1987 } else {
1988 ShouldNotReachHere();
1989 }
1991 if (VM_Version::supports_cmov() && !opr2->is_constant()) {
1992 // optimized version that does not require a branch
1993 if (opr2->is_single_cpu()) {
1994 assert(opr2->cpu_regnr() != result->cpu_regnr(), "opr2 already overwritten by previous move");
1995 __ cmov(ncond, result->as_register(), opr2->as_register());
1996 } else if (opr2->is_double_cpu()) {
1997 assert(opr2->cpu_regnrLo() != result->cpu_regnrLo() && opr2->cpu_regnrLo() != result->cpu_regnrHi(), "opr2 already overwritten by previous move");
1998 assert(opr2->cpu_regnrHi() != result->cpu_regnrLo() && opr2->cpu_regnrHi() != result->cpu_regnrHi(), "opr2 already overwritten by previous move");
1999 __ cmovptr(ncond, result->as_register_lo(), opr2->as_register_lo());
2000 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), opr2->as_register_hi());)
2001 } else if (opr2->is_single_stack()) {
2002 __ cmovl(ncond, result->as_register(), frame_map()->address_for_slot(opr2->single_stack_ix()));
2003 } else if (opr2->is_double_stack()) {
2004 __ cmovptr(ncond, result->as_register_lo(), frame_map()->address_for_slot(opr2->double_stack_ix(), lo_word_offset_in_bytes));
2005 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), frame_map()->address_for_slot(opr2->double_stack_ix(), hi_word_offset_in_bytes));)
2006 } else {
2007 ShouldNotReachHere();
2008 }
2010 } else {
2011 Label skip;
2012 __ jcc (acond, skip);
2013 if (opr2->is_cpu_register()) {
2014 reg2reg(opr2, result);
2015 } else if (opr2->is_stack()) {
2016 stack2reg(opr2, result, result->type());
2017 } else if (opr2->is_constant()) {
2018 const2reg(opr2, result, lir_patch_none, NULL);
2019 } else {
2020 ShouldNotReachHere();
2021 }
2022 __ bind(skip);
2023 }
2024 }
2027 void LIR_Assembler::arith_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dest, CodeEmitInfo* info, bool pop_fpu_stack) {
2028 assert(info == NULL, "should never be used, idiv/irem and ldiv/lrem not handled by this method");
2030 if (left->is_single_cpu()) {
2031 assert(left == dest, "left and dest must be equal");
2032 Register lreg = left->as_register();
2034 if (right->is_single_cpu()) {
2035 // cpu register - cpu register
2036 Register rreg = right->as_register();
2037 switch (code) {
2038 case lir_add: __ addl (lreg, rreg); break;
2039 case lir_sub: __ subl (lreg, rreg); break;
2040 case lir_mul: __ imull(lreg, rreg); break;
2041 default: ShouldNotReachHere();
2042 }
2044 } else if (right->is_stack()) {
2045 // cpu register - stack
2046 Address raddr = frame_map()->address_for_slot(right->single_stack_ix());
2047 switch (code) {
2048 case lir_add: __ addl(lreg, raddr); break;
2049 case lir_sub: __ subl(lreg, raddr); break;
2050 default: ShouldNotReachHere();
2051 }
2053 } else if (right->is_constant()) {
2054 // cpu register - constant
2055 jint c = right->as_constant_ptr()->as_jint();
2056 switch (code) {
2057 case lir_add: {
2058 __ incrementl(lreg, c);
2059 break;
2060 }
2061 case lir_sub: {
2062 __ decrementl(lreg, c);
2063 break;
2064 }
2065 default: ShouldNotReachHere();
2066 }
2068 } else {
2069 ShouldNotReachHere();
2070 }
2072 } else if (left->is_double_cpu()) {
2073 assert(left == dest, "left and dest must be equal");
2074 Register lreg_lo = left->as_register_lo();
2075 Register lreg_hi = left->as_register_hi();
2077 if (right->is_double_cpu()) {
2078 // cpu register - cpu register
2079 Register rreg_lo = right->as_register_lo();
2080 Register rreg_hi = right->as_register_hi();
2081 NOT_LP64(assert_different_registers(lreg_lo, lreg_hi, rreg_lo, rreg_hi));
2082 LP64_ONLY(assert_different_registers(lreg_lo, rreg_lo));
2083 switch (code) {
2084 case lir_add:
2085 __ addptr(lreg_lo, rreg_lo);
2086 NOT_LP64(__ adcl(lreg_hi, rreg_hi));
2087 break;
2088 case lir_sub:
2089 __ subptr(lreg_lo, rreg_lo);
2090 NOT_LP64(__ sbbl(lreg_hi, rreg_hi));
2091 break;
2092 case lir_mul:
2093 #ifdef _LP64
2094 __ imulq(lreg_lo, rreg_lo);
2095 #else
2096 assert(lreg_lo == rax && lreg_hi == rdx, "must be");
2097 __ imull(lreg_hi, rreg_lo);
2098 __ imull(rreg_hi, lreg_lo);
2099 __ addl (rreg_hi, lreg_hi);
2100 __ mull (rreg_lo);
2101 __ addl (lreg_hi, rreg_hi);
2102 #endif // _LP64
2103 break;
2104 default:
2105 ShouldNotReachHere();
2106 }
2108 } else if (right->is_constant()) {
2109 // cpu register - constant
2110 #ifdef _LP64
2111 jlong c = right->as_constant_ptr()->as_jlong_bits();
2112 __ movptr(r10, (intptr_t) c);
2113 switch (code) {
2114 case lir_add:
2115 __ addptr(lreg_lo, r10);
2116 break;
2117 case lir_sub:
2118 __ subptr(lreg_lo, r10);
2119 break;
2120 default:
2121 ShouldNotReachHere();
2122 }
2123 #else
2124 jint c_lo = right->as_constant_ptr()->as_jint_lo();
2125 jint c_hi = right->as_constant_ptr()->as_jint_hi();
2126 switch (code) {
2127 case lir_add:
2128 __ addptr(lreg_lo, c_lo);
2129 __ adcl(lreg_hi, c_hi);
2130 break;
2131 case lir_sub:
2132 __ subptr(lreg_lo, c_lo);
2133 __ sbbl(lreg_hi, c_hi);
2134 break;
2135 default:
2136 ShouldNotReachHere();
2137 }
2138 #endif // _LP64
2140 } else {
2141 ShouldNotReachHere();
2142 }
2144 } else if (left->is_single_xmm()) {
2145 assert(left == dest, "left and dest must be equal");
2146 XMMRegister lreg = left->as_xmm_float_reg();
2148 if (right->is_single_xmm()) {
2149 XMMRegister rreg = right->as_xmm_float_reg();
2150 switch (code) {
2151 case lir_add: __ addss(lreg, rreg); break;
2152 case lir_sub: __ subss(lreg, rreg); break;
2153 case lir_mul_strictfp: // fall through
2154 case lir_mul: __ mulss(lreg, rreg); break;
2155 case lir_div_strictfp: // fall through
2156 case lir_div: __ divss(lreg, rreg); break;
2157 default: ShouldNotReachHere();
2158 }
2159 } else {
2160 Address raddr;
2161 if (right->is_single_stack()) {
2162 raddr = frame_map()->address_for_slot(right->single_stack_ix());
2163 } else if (right->is_constant()) {
2164 // hack for now
2165 raddr = __ as_Address(InternalAddress(float_constant(right->as_jfloat())));
2166 } else {
2167 ShouldNotReachHere();
2168 }
2169 switch (code) {
2170 case lir_add: __ addss(lreg, raddr); break;
2171 case lir_sub: __ subss(lreg, raddr); break;
2172 case lir_mul_strictfp: // fall through
2173 case lir_mul: __ mulss(lreg, raddr); break;
2174 case lir_div_strictfp: // fall through
2175 case lir_div: __ divss(lreg, raddr); break;
2176 default: ShouldNotReachHere();
2177 }
2178 }
2180 } else if (left->is_double_xmm()) {
2181 assert(left == dest, "left and dest must be equal");
2183 XMMRegister lreg = left->as_xmm_double_reg();
2184 if (right->is_double_xmm()) {
2185 XMMRegister rreg = right->as_xmm_double_reg();
2186 switch (code) {
2187 case lir_add: __ addsd(lreg, rreg); break;
2188 case lir_sub: __ subsd(lreg, rreg); break;
2189 case lir_mul_strictfp: // fall through
2190 case lir_mul: __ mulsd(lreg, rreg); break;
2191 case lir_div_strictfp: // fall through
2192 case lir_div: __ divsd(lreg, rreg); break;
2193 default: ShouldNotReachHere();
2194 }
2195 } else {
2196 Address raddr;
2197 if (right->is_double_stack()) {
2198 raddr = frame_map()->address_for_slot(right->double_stack_ix());
2199 } else if (right->is_constant()) {
2200 // hack for now
2201 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble())));
2202 } else {
2203 ShouldNotReachHere();
2204 }
2205 switch (code) {
2206 case lir_add: __ addsd(lreg, raddr); break;
2207 case lir_sub: __ subsd(lreg, raddr); break;
2208 case lir_mul_strictfp: // fall through
2209 case lir_mul: __ mulsd(lreg, raddr); break;
2210 case lir_div_strictfp: // fall through
2211 case lir_div: __ divsd(lreg, raddr); break;
2212 default: ShouldNotReachHere();
2213 }
2214 }
2216 } else if (left->is_single_fpu()) {
2217 assert(dest->is_single_fpu(), "fpu stack allocation required");
2219 if (right->is_single_fpu()) {
2220 arith_fpu_implementation(code, left->fpu_regnr(), right->fpu_regnr(), dest->fpu_regnr(), pop_fpu_stack);
2222 } else {
2223 assert(left->fpu_regnr() == 0, "left must be on TOS");
2224 assert(dest->fpu_regnr() == 0, "dest must be on TOS");
2226 Address raddr;
2227 if (right->is_single_stack()) {
2228 raddr = frame_map()->address_for_slot(right->single_stack_ix());
2229 } else if (right->is_constant()) {
2230 address const_addr = float_constant(right->as_jfloat());
2231 assert(const_addr != NULL, "incorrect float/double constant maintainance");
2232 // hack for now
2233 raddr = __ as_Address(InternalAddress(const_addr));
2234 } else {
2235 ShouldNotReachHere();
2236 }
2238 switch (code) {
2239 case lir_add: __ fadd_s(raddr); break;
2240 case lir_sub: __ fsub_s(raddr); break;
2241 case lir_mul_strictfp: // fall through
2242 case lir_mul: __ fmul_s(raddr); break;
2243 case lir_div_strictfp: // fall through
2244 case lir_div: __ fdiv_s(raddr); break;
2245 default: ShouldNotReachHere();
2246 }
2247 }
2249 } else if (left->is_double_fpu()) {
2250 assert(dest->is_double_fpu(), "fpu stack allocation required");
2252 if (code == lir_mul_strictfp || code == lir_div_strictfp) {
2253 // Double values require special handling for strictfp mul/div on x86
2254 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1()));
2255 __ fmulp(left->fpu_regnrLo() + 1);
2256 }
2258 if (right->is_double_fpu()) {
2259 arith_fpu_implementation(code, left->fpu_regnrLo(), right->fpu_regnrLo(), dest->fpu_regnrLo(), pop_fpu_stack);
2261 } else {
2262 assert(left->fpu_regnrLo() == 0, "left must be on TOS");
2263 assert(dest->fpu_regnrLo() == 0, "dest must be on TOS");
2265 Address raddr;
2266 if (right->is_double_stack()) {
2267 raddr = frame_map()->address_for_slot(right->double_stack_ix());
2268 } else if (right->is_constant()) {
2269 // hack for now
2270 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble())));
2271 } else {
2272 ShouldNotReachHere();
2273 }
2275 switch (code) {
2276 case lir_add: __ fadd_d(raddr); break;
2277 case lir_sub: __ fsub_d(raddr); break;
2278 case lir_mul_strictfp: // fall through
2279 case lir_mul: __ fmul_d(raddr); break;
2280 case lir_div_strictfp: // fall through
2281 case lir_div: __ fdiv_d(raddr); break;
2282 default: ShouldNotReachHere();
2283 }
2284 }
2286 if (code == lir_mul_strictfp || code == lir_div_strictfp) {
2287 // Double values require special handling for strictfp mul/div on x86
2288 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2()));
2289 __ fmulp(dest->fpu_regnrLo() + 1);
2290 }
2292 } else if (left->is_single_stack() || left->is_address()) {
2293 assert(left == dest, "left and dest must be equal");
2295 Address laddr;
2296 if (left->is_single_stack()) {
2297 laddr = frame_map()->address_for_slot(left->single_stack_ix());
2298 } else if (left->is_address()) {
2299 laddr = as_Address(left->as_address_ptr());
2300 } else {
2301 ShouldNotReachHere();
2302 }
2304 if (right->is_single_cpu()) {
2305 Register rreg = right->as_register();
2306 switch (code) {
2307 case lir_add: __ addl(laddr, rreg); break;
2308 case lir_sub: __ subl(laddr, rreg); break;
2309 default: ShouldNotReachHere();
2310 }
2311 } else if (right->is_constant()) {
2312 jint c = right->as_constant_ptr()->as_jint();
2313 switch (code) {
2314 case lir_add: {
2315 __ incrementl(laddr, c);
2316 break;
2317 }
2318 case lir_sub: {
2319 __ decrementl(laddr, c);
2320 break;
2321 }
2322 default: ShouldNotReachHere();
2323 }
2324 } else {
2325 ShouldNotReachHere();
2326 }
2328 } else {
2329 ShouldNotReachHere();
2330 }
2331 }
2333 void LIR_Assembler::arith_fpu_implementation(LIR_Code code, int left_index, int right_index, int dest_index, bool pop_fpu_stack) {
2334 assert(pop_fpu_stack || (left_index == dest_index || right_index == dest_index), "invalid LIR");
2335 assert(!pop_fpu_stack || (left_index - 1 == dest_index || right_index - 1 == dest_index), "invalid LIR");
2336 assert(left_index == 0 || right_index == 0, "either must be on top of stack");
2338 bool left_is_tos = (left_index == 0);
2339 bool dest_is_tos = (dest_index == 0);
2340 int non_tos_index = (left_is_tos ? right_index : left_index);
2342 switch (code) {
2343 case lir_add:
2344 if (pop_fpu_stack) __ faddp(non_tos_index);
2345 else if (dest_is_tos) __ fadd (non_tos_index);
2346 else __ fadda(non_tos_index);
2347 break;
2349 case lir_sub:
2350 if (left_is_tos) {
2351 if (pop_fpu_stack) __ fsubrp(non_tos_index);
2352 else if (dest_is_tos) __ fsub (non_tos_index);
2353 else __ fsubra(non_tos_index);
2354 } else {
2355 if (pop_fpu_stack) __ fsubp (non_tos_index);
2356 else if (dest_is_tos) __ fsubr (non_tos_index);
2357 else __ fsuba (non_tos_index);
2358 }
2359 break;
2361 case lir_mul_strictfp: // fall through
2362 case lir_mul:
2363 if (pop_fpu_stack) __ fmulp(non_tos_index);
2364 else if (dest_is_tos) __ fmul (non_tos_index);
2365 else __ fmula(non_tos_index);
2366 break;
2368 case lir_div_strictfp: // fall through
2369 case lir_div:
2370 if (left_is_tos) {
2371 if (pop_fpu_stack) __ fdivrp(non_tos_index);
2372 else if (dest_is_tos) __ fdiv (non_tos_index);
2373 else __ fdivra(non_tos_index);
2374 } else {
2375 if (pop_fpu_stack) __ fdivp (non_tos_index);
2376 else if (dest_is_tos) __ fdivr (non_tos_index);
2377 else __ fdiva (non_tos_index);
2378 }
2379 break;
2381 case lir_rem:
2382 assert(left_is_tos && dest_is_tos && right_index == 1, "must be guaranteed by FPU stack allocation");
2383 __ fremr(noreg);
2384 break;
2386 default:
2387 ShouldNotReachHere();
2388 }
2389 }
2392 void LIR_Assembler::intrinsic_op(LIR_Code code, LIR_Opr value, LIR_Opr unused, LIR_Opr dest, LIR_Op* op) {
2393 if (value->is_double_xmm()) {
2394 switch(code) {
2395 case lir_abs :
2396 {
2397 if (dest->as_xmm_double_reg() != value->as_xmm_double_reg()) {
2398 __ movdbl(dest->as_xmm_double_reg(), value->as_xmm_double_reg());
2399 }
2400 __ andpd(dest->as_xmm_double_reg(),
2401 ExternalAddress((address)double_signmask_pool));
2402 }
2403 break;
2405 case lir_sqrt: __ sqrtsd(dest->as_xmm_double_reg(), value->as_xmm_double_reg()); break;
2406 // all other intrinsics are not available in the SSE instruction set, so FPU is used
2407 default : ShouldNotReachHere();
2408 }
2410 } else if (value->is_double_fpu()) {
2411 assert(value->fpu_regnrLo() == 0 && dest->fpu_regnrLo() == 0, "both must be on TOS");
2412 switch(code) {
2413 case lir_log : __ flog() ; break;
2414 case lir_log10 : __ flog10() ; break;
2415 case lir_abs : __ fabs() ; break;
2416 case lir_sqrt : __ fsqrt(); break;
2417 case lir_sin :
2418 // Should consider not saving rbx, if not necessary
2419 __ trigfunc('s', op->as_Op2()->fpu_stack_size());
2420 break;
2421 case lir_cos :
2422 // Should consider not saving rbx, if not necessary
2423 assert(op->as_Op2()->fpu_stack_size() <= 6, "sin and cos need two free stack slots");
2424 __ trigfunc('c', op->as_Op2()->fpu_stack_size());
2425 break;
2426 case lir_tan :
2427 // Should consider not saving rbx, if not necessary
2428 __ trigfunc('t', op->as_Op2()->fpu_stack_size());
2429 break;
2430 default : ShouldNotReachHere();
2431 }
2432 } else {
2433 Unimplemented();
2434 }
2435 }
2437 void LIR_Assembler::logic_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst) {
2438 // assert(left->destroys_register(), "check");
2439 if (left->is_single_cpu()) {
2440 Register reg = left->as_register();
2441 if (right->is_constant()) {
2442 int val = right->as_constant_ptr()->as_jint();
2443 switch (code) {
2444 case lir_logic_and: __ andl (reg, val); break;
2445 case lir_logic_or: __ orl (reg, val); break;
2446 case lir_logic_xor: __ xorl (reg, val); break;
2447 default: ShouldNotReachHere();
2448 }
2449 } else if (right->is_stack()) {
2450 // added support for stack operands
2451 Address raddr = frame_map()->address_for_slot(right->single_stack_ix());
2452 switch (code) {
2453 case lir_logic_and: __ andl (reg, raddr); break;
2454 case lir_logic_or: __ orl (reg, raddr); break;
2455 case lir_logic_xor: __ xorl (reg, raddr); break;
2456 default: ShouldNotReachHere();
2457 }
2458 } else {
2459 Register rright = right->as_register();
2460 switch (code) {
2461 case lir_logic_and: __ andptr (reg, rright); break;
2462 case lir_logic_or : __ orptr (reg, rright); break;
2463 case lir_logic_xor: __ xorptr (reg, rright); break;
2464 default: ShouldNotReachHere();
2465 }
2466 }
2467 move_regs(reg, dst->as_register());
2468 } else {
2469 Register l_lo = left->as_register_lo();
2470 Register l_hi = left->as_register_hi();
2471 if (right->is_constant()) {
2472 #ifdef _LP64
2473 __ mov64(rscratch1, right->as_constant_ptr()->as_jlong());
2474 switch (code) {
2475 case lir_logic_and:
2476 __ andq(l_lo, rscratch1);
2477 break;
2478 case lir_logic_or:
2479 __ orq(l_lo, rscratch1);
2480 break;
2481 case lir_logic_xor:
2482 __ xorq(l_lo, rscratch1);
2483 break;
2484 default: ShouldNotReachHere();
2485 }
2486 #else
2487 int r_lo = right->as_constant_ptr()->as_jint_lo();
2488 int r_hi = right->as_constant_ptr()->as_jint_hi();
2489 switch (code) {
2490 case lir_logic_and:
2491 __ andl(l_lo, r_lo);
2492 __ andl(l_hi, r_hi);
2493 break;
2494 case lir_logic_or:
2495 __ orl(l_lo, r_lo);
2496 __ orl(l_hi, r_hi);
2497 break;
2498 case lir_logic_xor:
2499 __ xorl(l_lo, r_lo);
2500 __ xorl(l_hi, r_hi);
2501 break;
2502 default: ShouldNotReachHere();
2503 }
2504 #endif // _LP64
2505 } else {
2506 #ifdef _LP64
2507 Register r_lo;
2508 if (right->type() == T_OBJECT || right->type() == T_ARRAY) {
2509 r_lo = right->as_register();
2510 } else {
2511 r_lo = right->as_register_lo();
2512 }
2513 #else
2514 Register r_lo = right->as_register_lo();
2515 Register r_hi = right->as_register_hi();
2516 assert(l_lo != r_hi, "overwriting registers");
2517 #endif
2518 switch (code) {
2519 case lir_logic_and:
2520 __ andptr(l_lo, r_lo);
2521 NOT_LP64(__ andptr(l_hi, r_hi);)
2522 break;
2523 case lir_logic_or:
2524 __ orptr(l_lo, r_lo);
2525 NOT_LP64(__ orptr(l_hi, r_hi);)
2526 break;
2527 case lir_logic_xor:
2528 __ xorptr(l_lo, r_lo);
2529 NOT_LP64(__ xorptr(l_hi, r_hi);)
2530 break;
2531 default: ShouldNotReachHere();
2532 }
2533 }
2535 Register dst_lo = dst->as_register_lo();
2536 Register dst_hi = dst->as_register_hi();
2538 #ifdef _LP64
2539 move_regs(l_lo, dst_lo);
2540 #else
2541 if (dst_lo == l_hi) {
2542 assert(dst_hi != l_lo, "overwriting registers");
2543 move_regs(l_hi, dst_hi);
2544 move_regs(l_lo, dst_lo);
2545 } else {
2546 assert(dst_lo != l_hi, "overwriting registers");
2547 move_regs(l_lo, dst_lo);
2548 move_regs(l_hi, dst_hi);
2549 }
2550 #endif // _LP64
2551 }
2552 }
2555 // we assume that rax, and rdx can be overwritten
2556 void LIR_Assembler::arithmetic_idiv(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr temp, LIR_Opr result, CodeEmitInfo* info) {
2558 assert(left->is_single_cpu(), "left must be register");
2559 assert(right->is_single_cpu() || right->is_constant(), "right must be register or constant");
2560 assert(result->is_single_cpu(), "result must be register");
2562 // assert(left->destroys_register(), "check");
2563 // assert(right->destroys_register(), "check");
2565 Register lreg = left->as_register();
2566 Register dreg = result->as_register();
2568 if (right->is_constant()) {
2569 int divisor = right->as_constant_ptr()->as_jint();
2570 assert(divisor > 0 && is_power_of_2(divisor), "must be");
2571 if (code == lir_idiv) {
2572 assert(lreg == rax, "must be rax,");
2573 assert(temp->as_register() == rdx, "tmp register must be rdx");
2574 __ cdql(); // sign extend into rdx:rax
2575 if (divisor == 2) {
2576 __ subl(lreg, rdx);
2577 } else {
2578 __ andl(rdx, divisor - 1);
2579 __ addl(lreg, rdx);
2580 }
2581 __ sarl(lreg, log2_intptr(divisor));
2582 move_regs(lreg, dreg);
2583 } else if (code == lir_irem) {
2584 Label done;
2585 __ mov(dreg, lreg);
2586 __ andl(dreg, 0x80000000 | (divisor - 1));
2587 __ jcc(Assembler::positive, done);
2588 __ decrement(dreg);
2589 __ orl(dreg, ~(divisor - 1));
2590 __ increment(dreg);
2591 __ bind(done);
2592 } else {
2593 ShouldNotReachHere();
2594 }
2595 } else {
2596 Register rreg = right->as_register();
2597 assert(lreg == rax, "left register must be rax,");
2598 assert(rreg != rdx, "right register must not be rdx");
2599 assert(temp->as_register() == rdx, "tmp register must be rdx");
2601 move_regs(lreg, rax);
2603 int idivl_offset = __ corrected_idivl(rreg);
2604 add_debug_info_for_div0(idivl_offset, info);
2605 if (code == lir_irem) {
2606 move_regs(rdx, dreg); // result is in rdx
2607 } else {
2608 move_regs(rax, dreg);
2609 }
2610 }
2611 }
2614 void LIR_Assembler::comp_op(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Op2* op) {
2615 if (opr1->is_single_cpu()) {
2616 Register reg1 = opr1->as_register();
2617 if (opr2->is_single_cpu()) {
2618 // cpu register - cpu register
2619 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) {
2620 __ cmpptr(reg1, opr2->as_register());
2621 } else {
2622 assert(opr2->type() != T_OBJECT && opr2->type() != T_ARRAY, "cmp int, oop?");
2623 __ cmpl(reg1, opr2->as_register());
2624 }
2625 } else if (opr2->is_stack()) {
2626 // cpu register - stack
2627 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) {
2628 __ cmpptr(reg1, frame_map()->address_for_slot(opr2->single_stack_ix()));
2629 } else {
2630 __ cmpl(reg1, frame_map()->address_for_slot(opr2->single_stack_ix()));
2631 }
2632 } else if (opr2->is_constant()) {
2633 // cpu register - constant
2634 LIR_Const* c = opr2->as_constant_ptr();
2635 if (c->type() == T_INT) {
2636 __ cmpl(reg1, c->as_jint());
2637 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) {
2638 // In 64bit oops are single register
2639 jobject o = c->as_jobject();
2640 if (o == NULL) {
2641 __ cmpptr(reg1, (int32_t)NULL_WORD);
2642 } else {
2643 #ifdef _LP64
2644 __ movoop(rscratch1, o);
2645 __ cmpptr(reg1, rscratch1);
2646 #else
2647 __ cmpoop(reg1, c->as_jobject());
2648 #endif // _LP64
2649 }
2650 } else {
2651 ShouldNotReachHere();
2652 }
2653 // cpu register - address
2654 } else if (opr2->is_address()) {
2655 if (op->info() != NULL) {
2656 add_debug_info_for_null_check_here(op->info());
2657 }
2658 __ cmpl(reg1, as_Address(opr2->as_address_ptr()));
2659 } else {
2660 ShouldNotReachHere();
2661 }
2663 } else if(opr1->is_double_cpu()) {
2664 Register xlo = opr1->as_register_lo();
2665 Register xhi = opr1->as_register_hi();
2666 if (opr2->is_double_cpu()) {
2667 #ifdef _LP64
2668 __ cmpptr(xlo, opr2->as_register_lo());
2669 #else
2670 // cpu register - cpu register
2671 Register ylo = opr2->as_register_lo();
2672 Register yhi = opr2->as_register_hi();
2673 __ subl(xlo, ylo);
2674 __ sbbl(xhi, yhi);
2675 if (condition == lir_cond_equal || condition == lir_cond_notEqual) {
2676 __ orl(xhi, xlo);
2677 }
2678 #endif // _LP64
2679 } else if (opr2->is_constant()) {
2680 // cpu register - constant 0
2681 assert(opr2->as_jlong() == (jlong)0, "only handles zero");
2682 #ifdef _LP64
2683 __ cmpptr(xlo, (int32_t)opr2->as_jlong());
2684 #else
2685 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "only handles equals case");
2686 __ orl(xhi, xlo);
2687 #endif // _LP64
2688 } else {
2689 ShouldNotReachHere();
2690 }
2692 } else if (opr1->is_single_xmm()) {
2693 XMMRegister reg1 = opr1->as_xmm_float_reg();
2694 if (opr2->is_single_xmm()) {
2695 // xmm register - xmm register
2696 __ ucomiss(reg1, opr2->as_xmm_float_reg());
2697 } else if (opr2->is_stack()) {
2698 // xmm register - stack
2699 __ ucomiss(reg1, frame_map()->address_for_slot(opr2->single_stack_ix()));
2700 } else if (opr2->is_constant()) {
2701 // xmm register - constant
2702 __ ucomiss(reg1, InternalAddress(float_constant(opr2->as_jfloat())));
2703 } else if (opr2->is_address()) {
2704 // xmm register - address
2705 if (op->info() != NULL) {
2706 add_debug_info_for_null_check_here(op->info());
2707 }
2708 __ ucomiss(reg1, as_Address(opr2->as_address_ptr()));
2709 } else {
2710 ShouldNotReachHere();
2711 }
2713 } else if (opr1->is_double_xmm()) {
2714 XMMRegister reg1 = opr1->as_xmm_double_reg();
2715 if (opr2->is_double_xmm()) {
2716 // xmm register - xmm register
2717 __ ucomisd(reg1, opr2->as_xmm_double_reg());
2718 } else if (opr2->is_stack()) {
2719 // xmm register - stack
2720 __ ucomisd(reg1, frame_map()->address_for_slot(opr2->double_stack_ix()));
2721 } else if (opr2->is_constant()) {
2722 // xmm register - constant
2723 __ ucomisd(reg1, InternalAddress(double_constant(opr2->as_jdouble())));
2724 } else if (opr2->is_address()) {
2725 // xmm register - address
2726 if (op->info() != NULL) {
2727 add_debug_info_for_null_check_here(op->info());
2728 }
2729 __ ucomisd(reg1, as_Address(opr2->pointer()->as_address()));
2730 } else {
2731 ShouldNotReachHere();
2732 }
2734 } else if(opr1->is_single_fpu() || opr1->is_double_fpu()) {
2735 assert(opr1->is_fpu_register() && opr1->fpu() == 0, "currently left-hand side must be on TOS (relax this restriction)");
2736 assert(opr2->is_fpu_register(), "both must be registers");
2737 __ fcmp(noreg, opr2->fpu(), op->fpu_pop_count() > 0, op->fpu_pop_count() > 1);
2739 } else if (opr1->is_address() && opr2->is_constant()) {
2740 LIR_Const* c = opr2->as_constant_ptr();
2741 #ifdef _LP64
2742 if (c->type() == T_OBJECT || c->type() == T_ARRAY) {
2743 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "need to reverse");
2744 __ movoop(rscratch1, c->as_jobject());
2745 }
2746 #endif // LP64
2747 if (op->info() != NULL) {
2748 add_debug_info_for_null_check_here(op->info());
2749 }
2750 // special case: address - constant
2751 LIR_Address* addr = opr1->as_address_ptr();
2752 if (c->type() == T_INT) {
2753 __ cmpl(as_Address(addr), c->as_jint());
2754 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) {
2755 #ifdef _LP64
2756 // %%% Make this explode if addr isn't reachable until we figure out a
2757 // better strategy by giving noreg as the temp for as_Address
2758 __ cmpptr(rscratch1, as_Address(addr, noreg));
2759 #else
2760 __ cmpoop(as_Address(addr), c->as_jobject());
2761 #endif // _LP64
2762 } else {
2763 ShouldNotReachHere();
2764 }
2766 } else {
2767 ShouldNotReachHere();
2768 }
2769 }
2771 void LIR_Assembler::comp_fl2i(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst, LIR_Op2* op) {
2772 if (code == lir_cmp_fd2i || code == lir_ucmp_fd2i) {
2773 if (left->is_single_xmm()) {
2774 assert(right->is_single_xmm(), "must match");
2775 __ cmpss2int(left->as_xmm_float_reg(), right->as_xmm_float_reg(), dst->as_register(), code == lir_ucmp_fd2i);
2776 } else if (left->is_double_xmm()) {
2777 assert(right->is_double_xmm(), "must match");
2778 __ cmpsd2int(left->as_xmm_double_reg(), right->as_xmm_double_reg(), dst->as_register(), code == lir_ucmp_fd2i);
2780 } else {
2781 assert(left->is_single_fpu() || left->is_double_fpu(), "must be");
2782 assert(right->is_single_fpu() || right->is_double_fpu(), "must match");
2784 assert(left->fpu() == 0, "left must be on TOS");
2785 __ fcmp2int(dst->as_register(), code == lir_ucmp_fd2i, right->fpu(),
2786 op->fpu_pop_count() > 0, op->fpu_pop_count() > 1);
2787 }
2788 } else {
2789 assert(code == lir_cmp_l2i, "check");
2790 #ifdef _LP64
2791 Label done;
2792 Register dest = dst->as_register();
2793 __ cmpptr(left->as_register_lo(), right->as_register_lo());
2794 __ movl(dest, -1);
2795 __ jccb(Assembler::less, done);
2796 __ set_byte_if_not_zero(dest);
2797 __ movzbl(dest, dest);
2798 __ bind(done);
2799 #else
2800 __ lcmp2int(left->as_register_hi(),
2801 left->as_register_lo(),
2802 right->as_register_hi(),
2803 right->as_register_lo());
2804 move_regs(left->as_register_hi(), dst->as_register());
2805 #endif // _LP64
2806 }
2807 }
2810 void LIR_Assembler::align_call(LIR_Code code) {
2811 if (os::is_MP()) {
2812 // make sure that the displacement word of the call ends up word aligned
2813 int offset = __ offset();
2814 switch (code) {
2815 case lir_static_call:
2816 case lir_optvirtual_call:
2817 case lir_dynamic_call:
2818 offset += NativeCall::displacement_offset;
2819 break;
2820 case lir_icvirtual_call:
2821 offset += NativeCall::displacement_offset + NativeMovConstReg::instruction_size;
2822 break;
2823 case lir_virtual_call: // currently, sparc-specific for niagara
2824 default: ShouldNotReachHere();
2825 }
2826 while (offset++ % BytesPerWord != 0) {
2827 __ nop();
2828 }
2829 }
2830 }
2833 void LIR_Assembler::call(LIR_OpJavaCall* op, relocInfo::relocType rtype) {
2834 assert(!os::is_MP() || (__ offset() + NativeCall::displacement_offset) % BytesPerWord == 0,
2835 "must be aligned");
2836 __ call(AddressLiteral(op->addr(), rtype));
2837 add_call_info(code_offset(), op->info());
2838 }
2841 void LIR_Assembler::ic_call(LIR_OpJavaCall* op) {
2842 RelocationHolder rh = virtual_call_Relocation::spec(pc());
2843 __ movoop(IC_Klass, (jobject)Universe::non_oop_word());
2844 assert(!os::is_MP() ||
2845 (__ offset() + NativeCall::displacement_offset) % BytesPerWord == 0,
2846 "must be aligned");
2847 __ call(AddressLiteral(op->addr(), rh));
2848 add_call_info(code_offset(), op->info());
2849 }
2852 /* Currently, vtable-dispatch is only enabled for sparc platforms */
2853 void LIR_Assembler::vtable_call(LIR_OpJavaCall* op) {
2854 ShouldNotReachHere();
2855 }
2858 void LIR_Assembler::emit_static_call_stub() {
2859 address call_pc = __ pc();
2860 address stub = __ start_a_stub(call_stub_size);
2861 if (stub == NULL) {
2862 bailout("static call stub overflow");
2863 return;
2864 }
2866 int start = __ offset();
2867 if (os::is_MP()) {
2868 // make sure that the displacement word of the call ends up word aligned
2869 int offset = __ offset() + NativeMovConstReg::instruction_size + NativeCall::displacement_offset;
2870 while (offset++ % BytesPerWord != 0) {
2871 __ nop();
2872 }
2873 }
2874 __ relocate(static_stub_Relocation::spec(call_pc));
2875 __ movoop(rbx, (jobject)NULL);
2876 // must be set to -1 at code generation time
2877 assert(!os::is_MP() || ((__ offset() + 1) % BytesPerWord) == 0, "must be aligned on MP");
2878 // On 64bit this will die since it will take a movq & jmp, must be only a jmp
2879 __ jump(RuntimeAddress(__ pc()));
2881 assert(__ offset() - start <= call_stub_size, "stub too big");
2882 __ end_a_stub();
2883 }
2886 void LIR_Assembler::throw_op(LIR_Opr exceptionPC, LIR_Opr exceptionOop, CodeEmitInfo* info) {
2887 assert(exceptionOop->as_register() == rax, "must match");
2888 assert(exceptionPC->as_register() == rdx, "must match");
2890 // exception object is not added to oop map by LinearScan
2891 // (LinearScan assumes that no oops are in fixed registers)
2892 info->add_register_oop(exceptionOop);
2893 Runtime1::StubID unwind_id;
2895 // get current pc information
2896 // pc is only needed if the method has an exception handler, the unwind code does not need it.
2897 int pc_for_athrow_offset = __ offset();
2898 InternalAddress pc_for_athrow(__ pc());
2899 __ lea(exceptionPC->as_register(), pc_for_athrow);
2900 add_call_info(pc_for_athrow_offset, info); // for exception handler
2902 __ verify_not_null_oop(rax);
2903 // search an exception handler (rax: exception oop, rdx: throwing pc)
2904 if (compilation()->has_fpu_code()) {
2905 unwind_id = Runtime1::handle_exception_id;
2906 } else {
2907 unwind_id = Runtime1::handle_exception_nofpu_id;
2908 }
2909 __ call(RuntimeAddress(Runtime1::entry_for(unwind_id)));
2911 // enough room for two byte trap
2912 __ nop();
2913 }
2916 void LIR_Assembler::unwind_op(LIR_Opr exceptionOop) {
2917 assert(exceptionOop->as_register() == rax, "must match");
2919 __ jmp(_unwind_handler_entry);
2920 }
2923 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, LIR_Opr count, LIR_Opr dest, LIR_Opr tmp) {
2925 // optimized version for linear scan:
2926 // * count must be already in ECX (guaranteed by LinearScan)
2927 // * left and dest must be equal
2928 // * tmp must be unused
2929 assert(count->as_register() == SHIFT_count, "count must be in ECX");
2930 assert(left == dest, "left and dest must be equal");
2931 assert(tmp->is_illegal(), "wasting a register if tmp is allocated");
2933 if (left->is_single_cpu()) {
2934 Register value = left->as_register();
2935 assert(value != SHIFT_count, "left cannot be ECX");
2937 switch (code) {
2938 case lir_shl: __ shll(value); break;
2939 case lir_shr: __ sarl(value); break;
2940 case lir_ushr: __ shrl(value); break;
2941 default: ShouldNotReachHere();
2942 }
2943 } else if (left->is_double_cpu()) {
2944 Register lo = left->as_register_lo();
2945 Register hi = left->as_register_hi();
2946 assert(lo != SHIFT_count && hi != SHIFT_count, "left cannot be ECX");
2947 #ifdef _LP64
2948 switch (code) {
2949 case lir_shl: __ shlptr(lo); break;
2950 case lir_shr: __ sarptr(lo); break;
2951 case lir_ushr: __ shrptr(lo); break;
2952 default: ShouldNotReachHere();
2953 }
2954 #else
2956 switch (code) {
2957 case lir_shl: __ lshl(hi, lo); break;
2958 case lir_shr: __ lshr(hi, lo, true); break;
2959 case lir_ushr: __ lshr(hi, lo, false); break;
2960 default: ShouldNotReachHere();
2961 }
2962 #endif // LP64
2963 } else {
2964 ShouldNotReachHere();
2965 }
2966 }
2969 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, jint count, LIR_Opr dest) {
2970 if (dest->is_single_cpu()) {
2971 // first move left into dest so that left is not destroyed by the shift
2972 Register value = dest->as_register();
2973 count = count & 0x1F; // Java spec
2975 move_regs(left->as_register(), value);
2976 switch (code) {
2977 case lir_shl: __ shll(value, count); break;
2978 case lir_shr: __ sarl(value, count); break;
2979 case lir_ushr: __ shrl(value, count); break;
2980 default: ShouldNotReachHere();
2981 }
2982 } else if (dest->is_double_cpu()) {
2983 #ifndef _LP64
2984 Unimplemented();
2985 #else
2986 // first move left into dest so that left is not destroyed by the shift
2987 Register value = dest->as_register_lo();
2988 count = count & 0x1F; // Java spec
2990 move_regs(left->as_register_lo(), value);
2991 switch (code) {
2992 case lir_shl: __ shlptr(value, count); break;
2993 case lir_shr: __ sarptr(value, count); break;
2994 case lir_ushr: __ shrptr(value, count); break;
2995 default: ShouldNotReachHere();
2996 }
2997 #endif // _LP64
2998 } else {
2999 ShouldNotReachHere();
3000 }
3001 }
3004 void LIR_Assembler::store_parameter(Register r, int offset_from_rsp_in_words) {
3005 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
3006 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
3007 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
3008 __ movptr (Address(rsp, offset_from_rsp_in_bytes), r);
3009 }
3012 void LIR_Assembler::store_parameter(jint c, int offset_from_rsp_in_words) {
3013 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
3014 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
3015 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
3016 __ movptr (Address(rsp, offset_from_rsp_in_bytes), c);
3017 }
3020 void LIR_Assembler::store_parameter(jobject o, int offset_from_rsp_in_words) {
3021 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
3022 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
3023 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
3024 __ movoop (Address(rsp, offset_from_rsp_in_bytes), o);
3025 }
3028 // This code replaces a call to arraycopy; no exception may
3029 // be thrown in this code, they must be thrown in the System.arraycopy
3030 // activation frame; we could save some checks if this would not be the case
3031 void LIR_Assembler::emit_arraycopy(LIR_OpArrayCopy* op) {
3032 ciArrayKlass* default_type = op->expected_type();
3033 Register src = op->src()->as_register();
3034 Register dst = op->dst()->as_register();
3035 Register src_pos = op->src_pos()->as_register();
3036 Register dst_pos = op->dst_pos()->as_register();
3037 Register length = op->length()->as_register();
3038 Register tmp = op->tmp()->as_register();
3040 CodeStub* stub = op->stub();
3041 int flags = op->flags();
3042 BasicType basic_type = default_type != NULL ? default_type->element_type()->basic_type() : T_ILLEGAL;
3043 if (basic_type == T_ARRAY) basic_type = T_OBJECT;
3045 // if we don't know anything or it's an object array, just go through the generic arraycopy
3046 if (default_type == NULL) {
3047 Label done;
3048 // save outgoing arguments on stack in case call to System.arraycopy is needed
3049 // HACK ALERT. This code used to push the parameters in a hardwired fashion
3050 // for interpreter calling conventions. Now we have to do it in new style conventions.
3051 // For the moment until C1 gets the new register allocator I just force all the
3052 // args to the right place (except the register args) and then on the back side
3053 // reload the register args properly if we go slow path. Yuck
3055 // These are proper for the calling convention
3057 store_parameter(length, 2);
3058 store_parameter(dst_pos, 1);
3059 store_parameter(dst, 0);
3061 // these are just temporary placements until we need to reload
3062 store_parameter(src_pos, 3);
3063 store_parameter(src, 4);
3064 NOT_LP64(assert(src == rcx && src_pos == rdx, "mismatch in calling convention");)
3066 address entry = CAST_FROM_FN_PTR(address, Runtime1::arraycopy);
3068 // pass arguments: may push as this is not a safepoint; SP must be fix at each safepoint
3069 #ifdef _LP64
3070 // The arguments are in java calling convention so we can trivially shift them to C
3071 // convention
3072 assert_different_registers(c_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4);
3073 __ mov(c_rarg0, j_rarg0);
3074 assert_different_registers(c_rarg1, j_rarg2, j_rarg3, j_rarg4);
3075 __ mov(c_rarg1, j_rarg1);
3076 assert_different_registers(c_rarg2, j_rarg3, j_rarg4);
3077 __ mov(c_rarg2, j_rarg2);
3078 assert_different_registers(c_rarg3, j_rarg4);
3079 __ mov(c_rarg3, j_rarg3);
3080 #ifdef _WIN64
3081 // Allocate abi space for args but be sure to keep stack aligned
3082 __ subptr(rsp, 6*wordSize);
3083 store_parameter(j_rarg4, 4);
3084 __ call(RuntimeAddress(entry));
3085 __ addptr(rsp, 6*wordSize);
3086 #else
3087 __ mov(c_rarg4, j_rarg4);
3088 __ call(RuntimeAddress(entry));
3089 #endif // _WIN64
3090 #else
3091 __ push(length);
3092 __ push(dst_pos);
3093 __ push(dst);
3094 __ push(src_pos);
3095 __ push(src);
3096 __ call_VM_leaf(entry, 5); // removes pushed parameter from the stack
3098 #endif // _LP64
3100 __ cmpl(rax, 0);
3101 __ jcc(Assembler::equal, *stub->continuation());
3103 // Reload values from the stack so they are where the stub
3104 // expects them.
3105 __ movptr (dst, Address(rsp, 0*BytesPerWord));
3106 __ movptr (dst_pos, Address(rsp, 1*BytesPerWord));
3107 __ movptr (length, Address(rsp, 2*BytesPerWord));
3108 __ movptr (src_pos, Address(rsp, 3*BytesPerWord));
3109 __ movptr (src, Address(rsp, 4*BytesPerWord));
3110 __ jmp(*stub->entry());
3112 __ bind(*stub->continuation());
3113 return;
3114 }
3116 assert(default_type != NULL && default_type->is_array_klass() && default_type->is_loaded(), "must be true at this point");
3118 int elem_size = type2aelembytes(basic_type);
3119 int shift_amount;
3120 Address::ScaleFactor scale;
3122 switch (elem_size) {
3123 case 1 :
3124 shift_amount = 0;
3125 scale = Address::times_1;
3126 break;
3127 case 2 :
3128 shift_amount = 1;
3129 scale = Address::times_2;
3130 break;
3131 case 4 :
3132 shift_amount = 2;
3133 scale = Address::times_4;
3134 break;
3135 case 8 :
3136 shift_amount = 3;
3137 scale = Address::times_8;
3138 break;
3139 default:
3140 ShouldNotReachHere();
3141 }
3143 Address src_length_addr = Address(src, arrayOopDesc::length_offset_in_bytes());
3144 Address dst_length_addr = Address(dst, arrayOopDesc::length_offset_in_bytes());
3145 Address src_klass_addr = Address(src, oopDesc::klass_offset_in_bytes());
3146 Address dst_klass_addr = Address(dst, oopDesc::klass_offset_in_bytes());
3148 // length and pos's are all sign extended at this point on 64bit
3150 // test for NULL
3151 if (flags & LIR_OpArrayCopy::src_null_check) {
3152 __ testptr(src, src);
3153 __ jcc(Assembler::zero, *stub->entry());
3154 }
3155 if (flags & LIR_OpArrayCopy::dst_null_check) {
3156 __ testptr(dst, dst);
3157 __ jcc(Assembler::zero, *stub->entry());
3158 }
3160 // check if negative
3161 if (flags & LIR_OpArrayCopy::src_pos_positive_check) {
3162 __ testl(src_pos, src_pos);
3163 __ jcc(Assembler::less, *stub->entry());
3164 }
3165 if (flags & LIR_OpArrayCopy::dst_pos_positive_check) {
3166 __ testl(dst_pos, dst_pos);
3167 __ jcc(Assembler::less, *stub->entry());
3168 }
3169 if (flags & LIR_OpArrayCopy::length_positive_check) {
3170 __ testl(length, length);
3171 __ jcc(Assembler::less, *stub->entry());
3172 }
3174 if (flags & LIR_OpArrayCopy::src_range_check) {
3175 __ lea(tmp, Address(src_pos, length, Address::times_1, 0));
3176 __ cmpl(tmp, src_length_addr);
3177 __ jcc(Assembler::above, *stub->entry());
3178 }
3179 if (flags & LIR_OpArrayCopy::dst_range_check) {
3180 __ lea(tmp, Address(dst_pos, length, Address::times_1, 0));
3181 __ cmpl(tmp, dst_length_addr);
3182 __ jcc(Assembler::above, *stub->entry());
3183 }
3185 if (flags & LIR_OpArrayCopy::type_check) {
3186 __ movptr(tmp, src_klass_addr);
3187 __ cmpptr(tmp, dst_klass_addr);
3188 __ jcc(Assembler::notEqual, *stub->entry());
3189 }
3191 #ifdef ASSERT
3192 if (basic_type != T_OBJECT || !(flags & LIR_OpArrayCopy::type_check)) {
3193 // Sanity check the known type with the incoming class. For the
3194 // primitive case the types must match exactly with src.klass and
3195 // dst.klass each exactly matching the default type. For the
3196 // object array case, if no type check is needed then either the
3197 // dst type is exactly the expected type and the src type is a
3198 // subtype which we can't check or src is the same array as dst
3199 // but not necessarily exactly of type default_type.
3200 Label known_ok, halt;
3201 __ movoop(tmp, default_type->constant_encoding());
3202 if (basic_type != T_OBJECT) {
3203 __ cmpptr(tmp, dst_klass_addr);
3204 __ jcc(Assembler::notEqual, halt);
3205 __ cmpptr(tmp, src_klass_addr);
3206 __ jcc(Assembler::equal, known_ok);
3207 } else {
3208 __ cmpptr(tmp, dst_klass_addr);
3209 __ jcc(Assembler::equal, known_ok);
3210 __ cmpptr(src, dst);
3211 __ jcc(Assembler::equal, known_ok);
3212 }
3213 __ bind(halt);
3214 __ stop("incorrect type information in arraycopy");
3215 __ bind(known_ok);
3216 }
3217 #endif
3219 if (shift_amount > 0 && basic_type != T_OBJECT) {
3220 __ shlptr(length, shift_amount);
3221 }
3223 #ifdef _LP64
3224 assert_different_registers(c_rarg0, dst, dst_pos, length);
3225 __ movl2ptr(src_pos, src_pos); //higher 32bits must be null
3226 __ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3227 assert_different_registers(c_rarg1, length);
3228 __ movl2ptr(dst_pos, dst_pos); //higher 32bits must be null
3229 __ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3230 __ mov(c_rarg2, length);
3232 #else
3233 __ lea(tmp, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3234 store_parameter(tmp, 0);
3235 __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3236 store_parameter(tmp, 1);
3237 store_parameter(length, 2);
3238 #endif // _LP64
3239 if (basic_type == T_OBJECT) {
3240 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Runtime1::oop_arraycopy), 0);
3241 } else {
3242 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Runtime1::primitive_arraycopy), 0);
3243 }
3245 __ bind(*stub->continuation());
3246 }
3249 void LIR_Assembler::emit_lock(LIR_OpLock* op) {
3250 Register obj = op->obj_opr()->as_register(); // may not be an oop
3251 Register hdr = op->hdr_opr()->as_register();
3252 Register lock = op->lock_opr()->as_register();
3253 if (!UseFastLocking) {
3254 __ jmp(*op->stub()->entry());
3255 } else if (op->code() == lir_lock) {
3256 Register scratch = noreg;
3257 if (UseBiasedLocking) {
3258 scratch = op->scratch_opr()->as_register();
3259 }
3260 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
3261 // add debug info for NullPointerException only if one is possible
3262 int null_check_offset = __ lock_object(hdr, obj, lock, scratch, *op->stub()->entry());
3263 if (op->info() != NULL) {
3264 add_debug_info_for_null_check(null_check_offset, op->info());
3265 }
3266 // done
3267 } else if (op->code() == lir_unlock) {
3268 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
3269 __ unlock_object(hdr, obj, lock, *op->stub()->entry());
3270 } else {
3271 Unimplemented();
3272 }
3273 __ bind(*op->stub()->continuation());
3274 }
3277 void LIR_Assembler::emit_profile_call(LIR_OpProfileCall* op) {
3278 ciMethod* method = op->profiled_method();
3279 int bci = op->profiled_bci();
3281 // Update counter for all call types
3282 ciMethodData* md = method->method_data();
3283 if (md == NULL) {
3284 bailout("out of memory building methodDataOop");
3285 return;
3286 }
3287 ciProfileData* data = md->bci_to_data(bci);
3288 assert(data->is_CounterData(), "need CounterData for calls");
3289 assert(op->mdo()->is_single_cpu(), "mdo must be allocated");
3290 Register mdo = op->mdo()->as_register();
3291 __ movoop(mdo, md->constant_encoding());
3292 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
3293 Bytecodes::Code bc = method->java_code_at_bci(bci);
3294 // Perform additional virtual call profiling for invokevirtual and
3295 // invokeinterface bytecodes
3296 if ((bc == Bytecodes::_invokevirtual || bc == Bytecodes::_invokeinterface) &&
3297 C1ProfileVirtualCalls) {
3298 assert(op->recv()->is_single_cpu(), "recv must be allocated");
3299 Register recv = op->recv()->as_register();
3300 assert_different_registers(mdo, recv);
3301 assert(data->is_VirtualCallData(), "need VirtualCallData for virtual calls");
3302 ciKlass* known_klass = op->known_holder();
3303 if (C1OptimizeVirtualCallProfiling && known_klass != NULL) {
3304 // We know the type that will be seen at this call site; we can
3305 // statically update the methodDataOop rather than needing to do
3306 // dynamic tests on the receiver type
3308 // NOTE: we should probably put a lock around this search to
3309 // avoid collisions by concurrent compilations
3310 ciVirtualCallData* vc_data = (ciVirtualCallData*) data;
3311 uint i;
3312 for (i = 0; i < VirtualCallData::row_limit(); i++) {
3313 ciKlass* receiver = vc_data->receiver(i);
3314 if (known_klass->equals(receiver)) {
3315 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i)));
3316 __ addptr(data_addr, DataLayout::counter_increment);
3317 return;
3318 }
3319 }
3321 // Receiver type not found in profile data; select an empty slot
3323 // Note that this is less efficient than it should be because it
3324 // always does a write to the receiver part of the
3325 // VirtualCallData rather than just the first time
3326 for (i = 0; i < VirtualCallData::row_limit(); i++) {
3327 ciKlass* receiver = vc_data->receiver(i);
3328 if (receiver == NULL) {
3329 Address recv_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_offset(i)));
3330 __ movoop(recv_addr, known_klass->constant_encoding());
3331 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i)));
3332 __ addptr(data_addr, DataLayout::counter_increment);
3333 return;
3334 }
3335 }
3336 } else {
3337 __ movptr(recv, Address(recv, oopDesc::klass_offset_in_bytes()));
3338 Label update_done;
3339 type_profile_helper(mdo, md, data, recv, &update_done);
3340 // Receiver did not match any saved receiver and there is no empty row for it.
3341 // Increment total counter to indicate polymorphic case.
3342 __ addptr(counter_addr, DataLayout::counter_increment);
3344 __ bind(update_done);
3345 }
3346 } else {
3347 // Static call
3348 __ addptr(counter_addr, DataLayout::counter_increment);
3349 }
3350 }
3352 void LIR_Assembler::emit_delay(LIR_OpDelay*) {
3353 Unimplemented();
3354 }
3357 void LIR_Assembler::monitor_address(int monitor_no, LIR_Opr dst) {
3358 __ lea(dst->as_register(), frame_map()->address_for_monitor_lock(monitor_no));
3359 }
3362 void LIR_Assembler::align_backward_branch_target() {
3363 __ align(BytesPerWord);
3364 }
3367 void LIR_Assembler::negate(LIR_Opr left, LIR_Opr dest) {
3368 if (left->is_single_cpu()) {
3369 __ negl(left->as_register());
3370 move_regs(left->as_register(), dest->as_register());
3372 } else if (left->is_double_cpu()) {
3373 Register lo = left->as_register_lo();
3374 #ifdef _LP64
3375 Register dst = dest->as_register_lo();
3376 __ movptr(dst, lo);
3377 __ negptr(dst);
3378 #else
3379 Register hi = left->as_register_hi();
3380 __ lneg(hi, lo);
3381 if (dest->as_register_lo() == hi) {
3382 assert(dest->as_register_hi() != lo, "destroying register");
3383 move_regs(hi, dest->as_register_hi());
3384 move_regs(lo, dest->as_register_lo());
3385 } else {
3386 move_regs(lo, dest->as_register_lo());
3387 move_regs(hi, dest->as_register_hi());
3388 }
3389 #endif // _LP64
3391 } else if (dest->is_single_xmm()) {
3392 if (left->as_xmm_float_reg() != dest->as_xmm_float_reg()) {
3393 __ movflt(dest->as_xmm_float_reg(), left->as_xmm_float_reg());
3394 }
3395 __ xorps(dest->as_xmm_float_reg(),
3396 ExternalAddress((address)float_signflip_pool));
3398 } else if (dest->is_double_xmm()) {
3399 if (left->as_xmm_double_reg() != dest->as_xmm_double_reg()) {
3400 __ movdbl(dest->as_xmm_double_reg(), left->as_xmm_double_reg());
3401 }
3402 __ xorpd(dest->as_xmm_double_reg(),
3403 ExternalAddress((address)double_signflip_pool));
3405 } else if (left->is_single_fpu() || left->is_double_fpu()) {
3406 assert(left->fpu() == 0, "arg must be on TOS");
3407 assert(dest->fpu() == 0, "dest must be TOS");
3408 __ fchs();
3410 } else {
3411 ShouldNotReachHere();
3412 }
3413 }
3416 void LIR_Assembler::leal(LIR_Opr addr, LIR_Opr dest) {
3417 assert(addr->is_address() && dest->is_register(), "check");
3418 Register reg;
3419 reg = dest->as_pointer_register();
3420 __ lea(reg, as_Address(addr->as_address_ptr()));
3421 }
3425 void LIR_Assembler::rt_call(LIR_Opr result, address dest, const LIR_OprList* args, LIR_Opr tmp, CodeEmitInfo* info) {
3426 assert(!tmp->is_valid(), "don't need temporary");
3427 __ call(RuntimeAddress(dest));
3428 if (info != NULL) {
3429 add_call_info_here(info);
3430 }
3431 }
3434 void LIR_Assembler::volatile_move_op(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info) {
3435 assert(type == T_LONG, "only for volatile long fields");
3437 if (info != NULL) {
3438 add_debug_info_for_null_check_here(info);
3439 }
3441 if (src->is_double_xmm()) {
3442 if (dest->is_double_cpu()) {
3443 #ifdef _LP64
3444 __ movdq(dest->as_register_lo(), src->as_xmm_double_reg());
3445 #else
3446 __ movdl(dest->as_register_lo(), src->as_xmm_double_reg());
3447 __ psrlq(src->as_xmm_double_reg(), 32);
3448 __ movdl(dest->as_register_hi(), src->as_xmm_double_reg());
3449 #endif // _LP64
3450 } else if (dest->is_double_stack()) {
3451 __ movdbl(frame_map()->address_for_slot(dest->double_stack_ix()), src->as_xmm_double_reg());
3452 } else if (dest->is_address()) {
3453 __ movdbl(as_Address(dest->as_address_ptr()), src->as_xmm_double_reg());
3454 } else {
3455 ShouldNotReachHere();
3456 }
3458 } else if (dest->is_double_xmm()) {
3459 if (src->is_double_stack()) {
3460 __ movdbl(dest->as_xmm_double_reg(), frame_map()->address_for_slot(src->double_stack_ix()));
3461 } else if (src->is_address()) {
3462 __ movdbl(dest->as_xmm_double_reg(), as_Address(src->as_address_ptr()));
3463 } else {
3464 ShouldNotReachHere();
3465 }
3467 } else if (src->is_double_fpu()) {
3468 assert(src->fpu_regnrLo() == 0, "must be TOS");
3469 if (dest->is_double_stack()) {
3470 __ fistp_d(frame_map()->address_for_slot(dest->double_stack_ix()));
3471 } else if (dest->is_address()) {
3472 __ fistp_d(as_Address(dest->as_address_ptr()));
3473 } else {
3474 ShouldNotReachHere();
3475 }
3477 } else if (dest->is_double_fpu()) {
3478 assert(dest->fpu_regnrLo() == 0, "must be TOS");
3479 if (src->is_double_stack()) {
3480 __ fild_d(frame_map()->address_for_slot(src->double_stack_ix()));
3481 } else if (src->is_address()) {
3482 __ fild_d(as_Address(src->as_address_ptr()));
3483 } else {
3484 ShouldNotReachHere();
3485 }
3486 } else {
3487 ShouldNotReachHere();
3488 }
3489 }
3492 void LIR_Assembler::membar() {
3493 // QQQ sparc TSO uses this,
3494 __ membar( Assembler::Membar_mask_bits(Assembler::StoreLoad));
3495 }
3497 void LIR_Assembler::membar_acquire() {
3498 // No x86 machines currently require load fences
3499 // __ load_fence();
3500 }
3502 void LIR_Assembler::membar_release() {
3503 // No x86 machines currently require store fences
3504 // __ store_fence();
3505 }
3507 void LIR_Assembler::get_thread(LIR_Opr result_reg) {
3508 assert(result_reg->is_register(), "check");
3509 #ifdef _LP64
3510 // __ get_thread(result_reg->as_register_lo());
3511 __ mov(result_reg->as_register(), r15_thread);
3512 #else
3513 __ get_thread(result_reg->as_register());
3514 #endif // _LP64
3515 }
3518 void LIR_Assembler::peephole(LIR_List*) {
3519 // do nothing for now
3520 }
3523 #undef __
