1 /*
2 * Copyright (c) 2000, 2017, 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 */
24
25 #include "precompiled.hpp"
26 #include "asm/macroAssembler.hpp"
27 #include "asm/macroAssembler.inline.hpp"
28 #include "c1/c1_Compilation.hpp"
29 #include "c1/c1_LIRAssembler.hpp"
30 #include "c1/c1_MacroAssembler.hpp"
31 #include "c1/c1_Runtime1.hpp"
32 #include "c1/c1_ValueStack.hpp"
33 #include "ci/ciArrayKlass.hpp"
34 #include "ci/ciInstance.hpp"
35 #include "gc/shared/barrierSet.hpp"
36 #include "gc/shared/cardTableModRefBS.hpp"
37 #include "gc/shared/collectedHeap.hpp"
38 #include "nativeInst_x86.hpp"
39 #include "oops/objArrayKlass.hpp"
40 #include "runtime/sharedRuntime.hpp"
41 #include "vmreg_x86.inline.hpp"
42
43
44 // These masks are used to provide 128-bit aligned bitmasks to the XMM
45 // instructions, to allow sign-masking or sign-bit flipping. They allow
46 // fast versions of NegF/NegD and AbsF/AbsD.
47
48 // Note: 'double' and 'long long' have 32-bits alignment on x86.
49 static jlong* double_quadword(jlong *adr, jlong lo, jlong hi) {
50 // Use the expression (adr)&(~0xF) to provide 128-bits aligned address
51 // of 128-bits operands for SSE instructions.
52 jlong *operand = (jlong*)(((intptr_t)adr) & ((intptr_t)(~0xF)));
53 // Store the value to a 128-bits operand.
54 operand[0] = lo;
55 operand[1] = hi;
56 return operand;
57 }
58
59 // Buffer for 128-bits masks used by SSE instructions.
60 static jlong fp_signmask_pool[(4+1)*2]; // 4*128bits(data) + 128bits(alignment)
61
62 // Static initialization during VM startup.
63 static jlong *float_signmask_pool = double_quadword(&fp_signmask_pool[1*2], CONST64(0x7FFFFFFF7FFFFFFF), CONST64(0x7FFFFFFF7FFFFFFF));
64 static jlong *double_signmask_pool = double_quadword(&fp_signmask_pool[2*2], CONST64(0x7FFFFFFFFFFFFFFF), CONST64(0x7FFFFFFFFFFFFFFF));
65 static jlong *float_signflip_pool = double_quadword(&fp_signmask_pool[3*2], (jlong)UCONST64(0x8000000080000000), (jlong)UCONST64(0x8000000080000000));
66 static jlong *double_signflip_pool = double_quadword(&fp_signmask_pool[4*2], (jlong)UCONST64(0x8000000000000000), (jlong)UCONST64(0x8000000000000000));
67
68
69
70 NEEDS_CLEANUP // remove this definitions ?
71 const Register IC_Klass = rax; // where the IC klass is cached
72 const Register SYNC_header = rax; // synchronization header
73 const Register SHIFT_count = rcx; // where count for shift operations must be
74
75 #define __ _masm->
76
77
78 static void select_different_registers(Register preserve,
79 Register extra,
80 Register &tmp1,
81 Register &tmp2) {
82 if (tmp1 == preserve) {
83 assert_different_registers(tmp1, tmp2, extra);
84 tmp1 = extra;
85 } else if (tmp2 == preserve) {
86 assert_different_registers(tmp1, tmp2, extra);
87 tmp2 = extra;
88 }
89 assert_different_registers(preserve, tmp1, tmp2);
90 }
91
92
93
94 static void select_different_registers(Register preserve,
95 Register extra,
96 Register &tmp1,
97 Register &tmp2,
98 Register &tmp3) {
99 if (tmp1 == preserve) {
100 assert_different_registers(tmp1, tmp2, tmp3, extra);
101 tmp1 = extra;
102 } else if (tmp2 == preserve) {
103 assert_different_registers(tmp1, tmp2, tmp3, extra);
104 tmp2 = extra;
105 } else if (tmp3 == preserve) {
106 assert_different_registers(tmp1, tmp2, tmp3, extra);
107 tmp3 = extra;
108 }
109 assert_different_registers(preserve, tmp1, tmp2, tmp3);
110 }
111
112
113
114 bool LIR_Assembler::is_small_constant(LIR_Opr opr) {
115 if (opr->is_constant()) {
116 LIR_Const* constant = opr->as_constant_ptr();
117 switch (constant->type()) {
118 case T_INT: {
119 return true;
120 }
121
122 default:
123 return false;
124 }
125 }
126 return false;
127 }
128
129
130 LIR_Opr LIR_Assembler::receiverOpr() {
131 return FrameMap::receiver_opr;
132 }
133
134 LIR_Opr LIR_Assembler::osrBufferPointer() {
135 return FrameMap::as_pointer_opr(receiverOpr()->as_register());
136 }
137
138 //--------------fpu register translations-----------------------
139
140
141 address LIR_Assembler::float_constant(float f) {
142 address const_addr = __ float_constant(f);
143 if (const_addr == NULL) {
144 bailout("const section overflow");
145 return __ code()->consts()->start();
146 } else {
147 return const_addr;
148 }
149 }
150
151
152 address LIR_Assembler::double_constant(double d) {
153 address const_addr = __ double_constant(d);
154 if (const_addr == NULL) {
155 bailout("const section overflow");
156 return __ code()->consts()->start();
157 } else {
158 return const_addr;
159 }
160 }
161
162
163 void LIR_Assembler::set_24bit_FPU() {
164 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_24()));
165 }
166
167 void LIR_Assembler::reset_FPU() {
168 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
169 }
170
171 void LIR_Assembler::fpop() {
172 __ fpop();
173 }
174
175 void LIR_Assembler::fxch(int i) {
176 __ fxch(i);
177 }
178
179 void LIR_Assembler::fld(int i) {
180 __ fld_s(i);
181 }
182
183 void LIR_Assembler::ffree(int i) {
184 __ ffree(i);
185 }
186
187 void LIR_Assembler::breakpoint() {
188 __ int3();
189 }
190
191 void LIR_Assembler::push(LIR_Opr opr) {
192 if (opr->is_single_cpu()) {
193 __ push_reg(opr->as_register());
194 } else if (opr->is_double_cpu()) {
195 NOT_LP64(__ push_reg(opr->as_register_hi()));
196 __ push_reg(opr->as_register_lo());
197 } else if (opr->is_stack()) {
198 __ push_addr(frame_map()->address_for_slot(opr->single_stack_ix()));
199 } else if (opr->is_constant()) {
200 LIR_Const* const_opr = opr->as_constant_ptr();
201 if (const_opr->type() == T_OBJECT) {
202 __ push_oop(const_opr->as_jobject());
203 } else if (const_opr->type() == T_INT) {
204 __ push_jint(const_opr->as_jint());
205 } else {
206 ShouldNotReachHere();
207 }
208
209 } else {
210 ShouldNotReachHere();
211 }
212 }
213
214 void LIR_Assembler::pop(LIR_Opr opr) {
215 if (opr->is_single_cpu()) {
216 __ pop_reg(opr->as_register());
217 } else {
218 ShouldNotReachHere();
219 }
220 }
221
222 bool LIR_Assembler::is_literal_address(LIR_Address* addr) {
223 return addr->base()->is_illegal() && addr->index()->is_illegal();
224 }
225
226 //-------------------------------------------
227
228 Address LIR_Assembler::as_Address(LIR_Address* addr) {
229 return as_Address(addr, rscratch1);
230 }
231
232 Address LIR_Assembler::as_Address(LIR_Address* addr, Register tmp) {
233 if (addr->base()->is_illegal()) {
234 assert(addr->index()->is_illegal(), "must be illegal too");
235 AddressLiteral laddr((address)addr->disp(), relocInfo::none);
236 if (! __ reachable(laddr)) {
237 __ movptr(tmp, laddr.addr());
238 Address res(tmp, 0);
239 return res;
240 } else {
241 return __ as_Address(laddr);
242 }
243 }
244
245 Register base = addr->base()->as_pointer_register();
246
247 if (addr->index()->is_illegal()) {
248 return Address( base, addr->disp());
249 } else if (addr->index()->is_cpu_register()) {
250 Register index = addr->index()->as_pointer_register();
251 return Address(base, index, (Address::ScaleFactor) addr->scale(), addr->disp());
252 } else if (addr->index()->is_constant()) {
253 intptr_t addr_offset = (addr->index()->as_constant_ptr()->as_jint() << addr->scale()) + addr->disp();
254 assert(Assembler::is_simm32(addr_offset), "must be");
255
256 return Address(base, addr_offset);
257 } else {
258 Unimplemented();
259 return Address();
260 }
261 }
262
263
264 Address LIR_Assembler::as_Address_hi(LIR_Address* addr) {
265 Address base = as_Address(addr);
266 return Address(base._base, base._index, base._scale, base._disp + BytesPerWord);
267 }
268
269
270 Address LIR_Assembler::as_Address_lo(LIR_Address* addr) {
271 return as_Address(addr);
272 }
273
274
275 void LIR_Assembler::osr_entry() {
276 offsets()->set_value(CodeOffsets::OSR_Entry, code_offset());
277 BlockBegin* osr_entry = compilation()->hir()->osr_entry();
278 ValueStack* entry_state = osr_entry->state();
279 int number_of_locks = entry_state->locks_size();
280
281 // we jump here if osr happens with the interpreter
282 // state set up to continue at the beginning of the
283 // loop that triggered osr - in particular, we have
284 // the following registers setup:
285 //
286 // rcx: osr buffer
287 //
288
289 // build frame
290 ciMethod* m = compilation()->method();
291 __ build_frame(initial_frame_size_in_bytes(), bang_size_in_bytes());
292
293 // OSR buffer is
294 //
295 // locals[nlocals-1..0]
296 // monitors[0..number_of_locks]
297 //
298 // locals is a direct copy of the interpreter frame so in the osr buffer
299 // so first slot in the local array is the last local from the interpreter
300 // and last slot is local[0] (receiver) from the interpreter
301 //
302 // Similarly with locks. The first lock slot in the osr buffer is the nth lock
303 // from the interpreter frame, the nth lock slot in the osr buffer is 0th lock
304 // in the interpreter frame (the method lock if a sync method)
305
306 // Initialize monitors in the compiled activation.
307 // rcx: pointer to osr buffer
308 //
309 // All other registers are dead at this point and the locals will be
310 // copied into place by code emitted in the IR.
311
312 Register OSR_buf = osrBufferPointer()->as_pointer_register();
313 { assert(frame::interpreter_frame_monitor_size() == BasicObjectLock::size(), "adjust code below");
314 int monitor_offset = BytesPerWord * method()->max_locals() +
315 (BasicObjectLock::size() * BytesPerWord) * (number_of_locks - 1);
316 // SharedRuntime::OSR_migration_begin() packs BasicObjectLocks in
317 // the OSR buffer using 2 word entries: first the lock and then
318 // the oop.
319 for (int i = 0; i < number_of_locks; i++) {
320 int slot_offset = monitor_offset - ((i * 2) * BytesPerWord);
321 #ifdef ASSERT
322 // verify the interpreter's monitor has a non-null object
323 {
324 Label L;
325 __ cmpptr(Address(OSR_buf, slot_offset + 1*BytesPerWord), (int32_t)NULL_WORD);
326 __ jcc(Assembler::notZero, L);
327 __ stop("locked object is NULL");
328 __ bind(L);
329 }
330 #endif
331 __ movptr(rbx, Address(OSR_buf, slot_offset + 0));
332 __ movptr(frame_map()->address_for_monitor_lock(i), rbx);
333 __ movptr(rbx, Address(OSR_buf, slot_offset + 1*BytesPerWord));
334 __ movptr(frame_map()->address_for_monitor_object(i), rbx);
335 }
336 }
337 }
338
339
340 // inline cache check; done before the frame is built.
341 int LIR_Assembler::check_icache() {
342 Register receiver = FrameMap::receiver_opr->as_register();
343 Register ic_klass = IC_Klass;
344 const int ic_cmp_size = LP64_ONLY(10) NOT_LP64(9);
345 const bool do_post_padding = VerifyOops || UseCompressedClassPointers;
346 if (!do_post_padding) {
347 // insert some nops so that the verified entry point is aligned on CodeEntryAlignment
348 __ align(CodeEntryAlignment, __ offset() + ic_cmp_size);
349 }
350 int offset = __ offset();
351 __ inline_cache_check(receiver, IC_Klass);
352 assert(__ offset() % CodeEntryAlignment == 0 || do_post_padding, "alignment must be correct");
353 if (do_post_padding) {
354 // force alignment after the cache check.
355 // It's been verified to be aligned if !VerifyOops
356 __ align(CodeEntryAlignment);
357 }
358 return offset;
359 }
360
361
362 void LIR_Assembler::jobject2reg_with_patching(Register reg, CodeEmitInfo* info) {
363 jobject o = NULL;
364 PatchingStub* patch = new PatchingStub(_masm, patching_id(info));
365 __ movoop(reg, o);
366 patching_epilog(patch, lir_patch_normal, reg, info);
367 }
368
369 void LIR_Assembler::klass2reg_with_patching(Register reg, CodeEmitInfo* info) {
370 Metadata* o = NULL;
371 PatchingStub* patch = new PatchingStub(_masm, PatchingStub::load_klass_id);
372 __ mov_metadata(reg, o);
373 patching_epilog(patch, lir_patch_normal, reg, info);
374 }
375
376 // This specifies the rsp decrement needed to build the frame
377 int LIR_Assembler::initial_frame_size_in_bytes() const {
378 // if rounding, must let FrameMap know!
379
380 // The frame_map records size in slots (32bit word)
381
382 // subtract two words to account for return address and link
383 return (frame_map()->framesize() - (2*VMRegImpl::slots_per_word)) * VMRegImpl::stack_slot_size;
384 }
385
386
387 int LIR_Assembler::emit_exception_handler() {
388 // if the last instruction is a call (typically to do a throw which
389 // is coming at the end after block reordering) the return address
390 // must still point into the code area in order to avoid assertion
391 // failures when searching for the corresponding bci => add a nop
392 // (was bug 5/14/1999 - gri)
393 __ nop();
394
395 // generate code for exception handler
396 address handler_base = __ start_a_stub(exception_handler_size());
397 if (handler_base == NULL) {
398 // not enough space left for the handler
399 bailout("exception handler overflow");
400 return -1;
401 }
402
403 int offset = code_offset();
404
405 // the exception oop and pc are in rax, and rdx
406 // no other registers need to be preserved, so invalidate them
407 __ invalidate_registers(false, true, true, false, true, true);
408
409 // check that there is really an exception
410 __ verify_not_null_oop(rax);
411
412 // search an exception handler (rax: exception oop, rdx: throwing pc)
413 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::handle_exception_from_callee_id)));
414 __ should_not_reach_here();
415 guarantee(code_offset() - offset <= exception_handler_size(), "overflow");
416 __ end_a_stub();
417
418 return offset;
419 }
420
421
422 // Emit the code to remove the frame from the stack in the exception
423 // unwind path.
424 int LIR_Assembler::emit_unwind_handler() {
425 #ifndef PRODUCT
426 if (CommentedAssembly) {
427 _masm->block_comment("Unwind handler");
428 }
429 #endif
430
431 int offset = code_offset();
432
433 // Fetch the exception from TLS and clear out exception related thread state
434 Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread);
435 NOT_LP64(__ get_thread(rsi));
436 __ movptr(rax, Address(thread, JavaThread::exception_oop_offset()));
437 __ movptr(Address(thread, JavaThread::exception_oop_offset()), (intptr_t)NULL_WORD);
438 __ movptr(Address(thread, JavaThread::exception_pc_offset()), (intptr_t)NULL_WORD);
439
440 __ bind(_unwind_handler_entry);
441 __ verify_not_null_oop(rax);
442 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
443 __ mov(rbx, rax); // Preserve the exception (rbx is always callee-saved)
444 }
445
446 // Preform needed unlocking
447 MonitorExitStub* stub = NULL;
448 if (method()->is_synchronized()) {
449 monitor_address(0, FrameMap::rax_opr);
450 stub = new MonitorExitStub(FrameMap::rax_opr, true, 0);
451 __ unlock_object(rdi, rsi, rax, *stub->entry());
452 __ bind(*stub->continuation());
453 }
454
455 if (compilation()->env()->dtrace_method_probes()) {
456 #ifdef _LP64
457 __ mov(rdi, r15_thread);
458 __ mov_metadata(rsi, method()->constant_encoding());
459 #else
460 __ get_thread(rax);
461 __ movptr(Address(rsp, 0), rax);
462 __ mov_metadata(Address(rsp, sizeof(void*)), method()->constant_encoding());
463 #endif
464 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit)));
465 }
466
467 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
468 __ mov(rax, rbx); // Restore the exception
469 }
470
471 // remove the activation and dispatch to the unwind handler
472 __ remove_frame(initial_frame_size_in_bytes());
473 __ jump(RuntimeAddress(Runtime1::entry_for(Runtime1::unwind_exception_id)));
474
475 // Emit the slow path assembly
476 if (stub != NULL) {
477 stub->emit_code(this);
478 }
479
480 return offset;
481 }
482
483
484 int LIR_Assembler::emit_deopt_handler() {
485 // if the last instruction is a call (typically to do a throw which
486 // is coming at the end after block reordering) the return address
487 // must still point into the code area in order to avoid assertion
488 // failures when searching for the corresponding bci => add a nop
489 // (was bug 5/14/1999 - gri)
490 __ nop();
491
492 // generate code for exception handler
493 address handler_base = __ start_a_stub(deopt_handler_size());
494 if (handler_base == NULL) {
495 // not enough space left for the handler
496 bailout("deopt handler overflow");
497 return -1;
498 }
499
500 int offset = code_offset();
501 InternalAddress here(__ pc());
502
503 __ pushptr(here.addr());
504 __ jump(RuntimeAddress(SharedRuntime::deopt_blob()->unpack()));
505 guarantee(code_offset() - offset <= deopt_handler_size(), "overflow");
506 __ end_a_stub();
507
508 return offset;
509 }
510
511
512 void LIR_Assembler::return_op(LIR_Opr result) {
513 assert(result->is_illegal() || !result->is_single_cpu() || result->as_register() == rax, "word returns are in rax,");
514 if (!result->is_illegal() && result->is_float_kind() && !result->is_xmm_register()) {
515 assert(result->fpu() == 0, "result must already be on TOS");
516 }
517
518 // Pop the stack before the safepoint code
519 __ remove_frame(initial_frame_size_in_bytes());
520
521 if (StackReservedPages > 0 && compilation()->has_reserved_stack_access()) {
522 __ reserved_stack_check();
523 }
524
525 bool result_is_oop = result->is_valid() ? result->is_oop() : false;
526
527 // Note: we do not need to round double result; float result has the right precision
528 // the poll sets the condition code, but no data registers
529
530 if (SafepointMechanism::uses_thread_local_poll()) {
531 #ifdef _LP64
532 const Register poll_addr = rscratch1;
533 __ movptr(poll_addr, Address(r15_thread, Thread::polling_page_offset()));
534 #else
535 const Register poll_addr = rbx;
536 assert(FrameMap::is_caller_save_register(poll_addr), "will overwrite");
537 __ get_thread(poll_addr);
538 __ movptr(poll_addr, Address(poll_addr, in_bytes(Thread::polling_page_offset())));
539 #endif
540 __ relocate(relocInfo::poll_return_type);
541 __ testl(rax, Address(poll_addr, 0));
542 } else {
543 AddressLiteral polling_page(os::get_polling_page(), relocInfo::poll_return_type);
544
545 if (Assembler::is_polling_page_far()) {
546 __ lea(rscratch1, polling_page);
547 __ relocate(relocInfo::poll_return_type);
548 __ testl(rax, Address(rscratch1, 0));
549 } else {
550 __ testl(rax, polling_page);
551 }
552 }
553 __ ret(0);
554 }
555
556
557 int LIR_Assembler::safepoint_poll(LIR_Opr tmp, CodeEmitInfo* info) {
558 guarantee(info != NULL, "Shouldn't be NULL");
559 int offset = __ offset();
560 if (SafepointMechanism::uses_thread_local_poll()) {
561 #ifdef _LP64
562 const Register poll_addr = rscratch1;
563 __ movptr(poll_addr, Address(r15_thread, Thread::polling_page_offset()));
564 #else
565 assert(tmp->is_cpu_register(), "needed");
566 const Register poll_addr = tmp->as_register();
567 __ get_thread(poll_addr);
568 __ movptr(poll_addr, Address(poll_addr, in_bytes(Thread::polling_page_offset())));
569 #endif
570 add_debug_info_for_branch(info);
571 __ relocate(relocInfo::poll_type);
572 address pre_pc = __ pc();
573 __ testl(rax, Address(poll_addr, 0));
574 address post_pc = __ pc();
575 guarantee(pointer_delta(post_pc, pre_pc, 1) == 2 LP64_ONLY(+1), "must be exact length");
576 } else {
577 AddressLiteral polling_page(os::get_polling_page(), relocInfo::poll_type);
578 if (Assembler::is_polling_page_far()) {
579 __ lea(rscratch1, polling_page);
580 offset = __ offset();
581 add_debug_info_for_branch(info);
582 __ relocate(relocInfo::poll_type);
583 __ testl(rax, Address(rscratch1, 0));
584 } else {
585 add_debug_info_for_branch(info);
586 __ testl(rax, polling_page);
587 }
588 }
589 return offset;
590 }
591
592
593 void LIR_Assembler::move_regs(Register from_reg, Register to_reg) {
594 if (from_reg != to_reg) __ mov(to_reg, from_reg);
595 }
596
597 void LIR_Assembler::swap_reg(Register a, Register b) {
598 __ xchgptr(a, b);
599 }
600
601
602 void LIR_Assembler::const2reg(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) {
603 assert(src->is_constant(), "should not call otherwise");
604 assert(dest->is_register(), "should not call otherwise");
605 LIR_Const* c = src->as_constant_ptr();
606
607 switch (c->type()) {
608 case T_INT: {
609 assert(patch_code == lir_patch_none, "no patching handled here");
610 __ movl(dest->as_register(), c->as_jint());
611 break;
612 }
613
614 case T_ADDRESS: {
615 assert(patch_code == lir_patch_none, "no patching handled here");
616 __ movptr(dest->as_register(), c->as_jint());
617 break;
618 }
619
620 case T_LONG: {
621 assert(patch_code == lir_patch_none, "no patching handled here");
622 #ifdef _LP64
623 __ movptr(dest->as_register_lo(), (intptr_t)c->as_jlong());
624 #else
625 __ movptr(dest->as_register_lo(), c->as_jint_lo());
626 __ movptr(dest->as_register_hi(), c->as_jint_hi());
627 #endif // _LP64
628 break;
629 }
630
631 case T_OBJECT: {
632 if (patch_code != lir_patch_none) {
633 jobject2reg_with_patching(dest->as_register(), info);
634 } else {
635 __ movoop(dest->as_register(), c->as_jobject());
636 }
637 break;
638 }
639
640 case T_METADATA: {
641 if (patch_code != lir_patch_none) {
642 klass2reg_with_patching(dest->as_register(), info);
643 } else {
644 __ mov_metadata(dest->as_register(), c->as_metadata());
645 }
646 break;
647 }
648
649 case T_FLOAT: {
650 if (dest->is_single_xmm()) {
651 if (c->is_zero_float()) {
652 __ xorps(dest->as_xmm_float_reg(), dest->as_xmm_float_reg());
653 } else {
654 __ movflt(dest->as_xmm_float_reg(),
655 InternalAddress(float_constant(c->as_jfloat())));
656 }
657 } else {
658 assert(dest->is_single_fpu(), "must be");
659 assert(dest->fpu_regnr() == 0, "dest must be TOS");
660 if (c->is_zero_float()) {
661 __ fldz();
662 } else if (c->is_one_float()) {
663 __ fld1();
664 } else {
665 __ fld_s (InternalAddress(float_constant(c->as_jfloat())));
666 }
667 }
668 break;
669 }
670
671 case T_DOUBLE: {
672 if (dest->is_double_xmm()) {
673 if (c->is_zero_double()) {
674 __ xorpd(dest->as_xmm_double_reg(), dest->as_xmm_double_reg());
675 } else {
676 __ movdbl(dest->as_xmm_double_reg(),
677 InternalAddress(double_constant(c->as_jdouble())));
678 }
679 } else {
680 assert(dest->is_double_fpu(), "must be");
681 assert(dest->fpu_regnrLo() == 0, "dest must be TOS");
682 if (c->is_zero_double()) {
683 __ fldz();
684 } else if (c->is_one_double()) {
685 __ fld1();
686 } else {
687 __ fld_d (InternalAddress(double_constant(c->as_jdouble())));
688 }
689 }
690 break;
691 }
692
693 default:
694 ShouldNotReachHere();
695 }
696 }
697
698 void LIR_Assembler::const2stack(LIR_Opr src, LIR_Opr dest) {
699 assert(src->is_constant(), "should not call otherwise");
700 assert(dest->is_stack(), "should not call otherwise");
701 LIR_Const* c = src->as_constant_ptr();
702
703 switch (c->type()) {
704 case T_INT: // fall through
705 case T_FLOAT:
706 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits());
707 break;
708
709 case T_ADDRESS:
710 __ movptr(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits());
711 break;
712
713 case T_OBJECT:
714 __ movoop(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jobject());
715 break;
716
717 case T_LONG: // fall through
718 case T_DOUBLE:
719 #ifdef _LP64
720 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(),
721 lo_word_offset_in_bytes), (intptr_t)c->as_jlong_bits());
722 #else
723 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(),
724 lo_word_offset_in_bytes), c->as_jint_lo_bits());
725 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(),
726 hi_word_offset_in_bytes), c->as_jint_hi_bits());
727 #endif // _LP64
728 break;
729
730 default:
731 ShouldNotReachHere();
732 }
733 }
734
735 void LIR_Assembler::const2mem(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info, bool wide) {
736 assert(src->is_constant(), "should not call otherwise");
737 assert(dest->is_address(), "should not call otherwise");
738 LIR_Const* c = src->as_constant_ptr();
739 LIR_Address* addr = dest->as_address_ptr();
740
741 int null_check_here = code_offset();
742 switch (type) {
743 case T_INT: // fall through
744 case T_FLOAT:
745 __ movl(as_Address(addr), c->as_jint_bits());
746 break;
747
748 case T_ADDRESS:
749 __ movptr(as_Address(addr), c->as_jint_bits());
750 break;
751
752 case T_OBJECT: // fall through
753 case T_ARRAY:
754 if (c->as_jobject() == NULL) {
755 if (UseCompressedOops && !wide) {
756 __ movl(as_Address(addr), (int32_t)NULL_WORD);
757 } else {
758 #ifdef _LP64
759 __ xorptr(rscratch1, rscratch1);
760 null_check_here = code_offset();
761 __ movptr(as_Address(addr), rscratch1);
762 #else
763 __ movptr(as_Address(addr), NULL_WORD);
764 #endif
765 }
766 } else {
767 if (is_literal_address(addr)) {
768 ShouldNotReachHere();
769 __ movoop(as_Address(addr, noreg), c->as_jobject());
770 } else {
771 #ifdef _LP64
772 __ movoop(rscratch1, c->as_jobject());
773 if (UseCompressedOops && !wide) {
774 __ encode_heap_oop(rscratch1);
775 null_check_here = code_offset();
776 __ movl(as_Address_lo(addr), rscratch1);
777 } else {
778 null_check_here = code_offset();
779 __ movptr(as_Address_lo(addr), rscratch1);
780 }
781 #else
782 __ movoop(as_Address(addr), c->as_jobject());
783 #endif
784 }
785 }
786 break;
787
788 case T_LONG: // fall through
789 case T_DOUBLE:
790 #ifdef _LP64
791 if (is_literal_address(addr)) {
792 ShouldNotReachHere();
793 __ movptr(as_Address(addr, r15_thread), (intptr_t)c->as_jlong_bits());
794 } else {
795 __ movptr(r10, (intptr_t)c->as_jlong_bits());
796 null_check_here = code_offset();
797 __ movptr(as_Address_lo(addr), r10);
798 }
799 #else
800 // Always reachable in 32bit so this doesn't produce useless move literal
801 __ movptr(as_Address_hi(addr), c->as_jint_hi_bits());
802 __ movptr(as_Address_lo(addr), c->as_jint_lo_bits());
803 #endif // _LP64
804 break;
805
806 case T_BOOLEAN: // fall through
807 case T_BYTE:
808 __ movb(as_Address(addr), c->as_jint() & 0xFF);
809 break;
810
811 case T_CHAR: // fall through
812 case T_SHORT:
813 __ movw(as_Address(addr), c->as_jint() & 0xFFFF);
814 break;
815
816 default:
817 ShouldNotReachHere();
818 };
819
820 if (info != NULL) {
821 add_debug_info_for_null_check(null_check_here, info);
822 }
823 }
824
825
826 void LIR_Assembler::reg2reg(LIR_Opr src, LIR_Opr dest) {
827 assert(src->is_register(), "should not call otherwise");
828 assert(dest->is_register(), "should not call otherwise");
829
830 // move between cpu-registers
831 if (dest->is_single_cpu()) {
832 #ifdef _LP64
833 if (src->type() == T_LONG) {
834 // Can do LONG -> OBJECT
835 move_regs(src->as_register_lo(), dest->as_register());
836 return;
837 }
838 #endif
839 assert(src->is_single_cpu(), "must match");
840 if (src->type() == T_OBJECT) {
841 __ verify_oop(src->as_register());
842 }
843 move_regs(src->as_register(), dest->as_register());
844
845 } else if (dest->is_double_cpu()) {
846 #ifdef _LP64
847 if (src->type() == T_OBJECT || src->type() == T_ARRAY) {
848 // Surprising to me but we can see move of a long to t_object
849 __ verify_oop(src->as_register());
850 move_regs(src->as_register(), dest->as_register_lo());
851 return;
852 }
853 #endif
854 assert(src->is_double_cpu(), "must match");
855 Register f_lo = src->as_register_lo();
856 Register f_hi = src->as_register_hi();
857 Register t_lo = dest->as_register_lo();
858 Register t_hi = dest->as_register_hi();
859 #ifdef _LP64
860 assert(f_hi == f_lo, "must be same");
861 assert(t_hi == t_lo, "must be same");
862 move_regs(f_lo, t_lo);
863 #else
864 assert(f_lo != f_hi && t_lo != t_hi, "invalid register allocation");
865
866
867 if (f_lo == t_hi && f_hi == t_lo) {
868 swap_reg(f_lo, f_hi);
869 } else if (f_hi == t_lo) {
870 assert(f_lo != t_hi, "overwriting register");
871 move_regs(f_hi, t_hi);
872 move_regs(f_lo, t_lo);
873 } else {
874 assert(f_hi != t_lo, "overwriting register");
875 move_regs(f_lo, t_lo);
876 move_regs(f_hi, t_hi);
877 }
878 #endif // LP64
879
880 // special moves from fpu-register to xmm-register
881 // necessary for method results
882 } else if (src->is_single_xmm() && !dest->is_single_xmm()) {
883 __ movflt(Address(rsp, 0), src->as_xmm_float_reg());
884 __ fld_s(Address(rsp, 0));
885 } else if (src->is_double_xmm() && !dest->is_double_xmm()) {
886 __ movdbl(Address(rsp, 0), src->as_xmm_double_reg());
887 __ fld_d(Address(rsp, 0));
888 } else if (dest->is_single_xmm() && !src->is_single_xmm()) {
889 __ fstp_s(Address(rsp, 0));
890 __ movflt(dest->as_xmm_float_reg(), Address(rsp, 0));
891 } else if (dest->is_double_xmm() && !src->is_double_xmm()) {
892 __ fstp_d(Address(rsp, 0));
893 __ movdbl(dest->as_xmm_double_reg(), Address(rsp, 0));
894
895 // move between xmm-registers
896 } else if (dest->is_single_xmm()) {
897 assert(src->is_single_xmm(), "must match");
898 __ movflt(dest->as_xmm_float_reg(), src->as_xmm_float_reg());
899 } else if (dest->is_double_xmm()) {
900 assert(src->is_double_xmm(), "must match");
901 __ movdbl(dest->as_xmm_double_reg(), src->as_xmm_double_reg());
902
903 // move between fpu-registers (no instruction necessary because of fpu-stack)
904 } else if (dest->is_single_fpu() || dest->is_double_fpu()) {
905 assert(src->is_single_fpu() || src->is_double_fpu(), "must match");
906 assert(src->fpu() == dest->fpu(), "currently should be nothing to do");
907 } else {
908 ShouldNotReachHere();
909 }
910 }
911
912 void LIR_Assembler::reg2stack(LIR_Opr src, LIR_Opr dest, BasicType type, bool pop_fpu_stack) {
913 assert(src->is_register(), "should not call otherwise");
914 assert(dest->is_stack(), "should not call otherwise");
915
916 if (src->is_single_cpu()) {
917 Address dst = frame_map()->address_for_slot(dest->single_stack_ix());
918 if (type == T_OBJECT || type == T_ARRAY) {
919 __ verify_oop(src->as_register());
920 __ movptr (dst, src->as_register());
921 } else if (type == T_METADATA) {
922 __ movptr (dst, src->as_register());
923 } else {
924 __ movl (dst, src->as_register());
925 }
926
927 } else if (src->is_double_cpu()) {
928 Address dstLO = frame_map()->address_for_slot(dest->double_stack_ix(), lo_word_offset_in_bytes);
929 Address dstHI = frame_map()->address_for_slot(dest->double_stack_ix(), hi_word_offset_in_bytes);
930 __ movptr (dstLO, src->as_register_lo());
931 NOT_LP64(__ movptr (dstHI, src->as_register_hi()));
932
933 } else if (src->is_single_xmm()) {
934 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix());
935 __ movflt(dst_addr, src->as_xmm_float_reg());
936
937 } else if (src->is_double_xmm()) {
938 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix());
939 __ movdbl(dst_addr, src->as_xmm_double_reg());
940
941 } else if (src->is_single_fpu()) {
942 assert(src->fpu_regnr() == 0, "argument must be on TOS");
943 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix());
944 if (pop_fpu_stack) __ fstp_s (dst_addr);
945 else __ fst_s (dst_addr);
946
947 } else if (src->is_double_fpu()) {
948 assert(src->fpu_regnrLo() == 0, "argument must be on TOS");
949 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix());
950 if (pop_fpu_stack) __ fstp_d (dst_addr);
951 else __ fst_d (dst_addr);
952
953 } else {
954 ShouldNotReachHere();
955 }
956 }
957
958
959 void LIR_Assembler::reg2mem(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool pop_fpu_stack, bool wide, bool /* unaligned */) {
960 LIR_Address* to_addr = dest->as_address_ptr();
961 PatchingStub* patch = NULL;
962 Register compressed_src = rscratch1;
963
964 if (type == T_ARRAY || type == T_OBJECT) {
965 __ verify_oop(src->as_register());
966 #ifdef _LP64
967 if (UseCompressedOops && !wide) {
968 __ movptr(compressed_src, src->as_register());
969 __ encode_heap_oop(compressed_src);
970 if (patch_code != lir_patch_none) {
971 info->oop_map()->set_narrowoop(compressed_src->as_VMReg());
972 }
973 }
974 #endif
975 }
976
977 if (patch_code != lir_patch_none) {
978 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
979 Address toa = as_Address(to_addr);
980 assert(toa.disp() != 0, "must have");
981 }
982
983 int null_check_here = code_offset();
984 switch (type) {
985 case T_FLOAT: {
986 if (src->is_single_xmm()) {
987 __ movflt(as_Address(to_addr), src->as_xmm_float_reg());
988 } else {
989 assert(src->is_single_fpu(), "must be");
990 assert(src->fpu_regnr() == 0, "argument must be on TOS");
991 if (pop_fpu_stack) __ fstp_s(as_Address(to_addr));
992 else __ fst_s (as_Address(to_addr));
993 }
994 break;
995 }
996
997 case T_DOUBLE: {
998 if (src->is_double_xmm()) {
999 __ movdbl(as_Address(to_addr), src->as_xmm_double_reg());
1000 } else {
1001 assert(src->is_double_fpu(), "must be");
1002 assert(src->fpu_regnrLo() == 0, "argument must be on TOS");
1003 if (pop_fpu_stack) __ fstp_d(as_Address(to_addr));
1004 else __ fst_d (as_Address(to_addr));
1005 }
1006 break;
1007 }
1008
1009 case T_ARRAY: // fall through
1010 case T_OBJECT: // fall through
1011 if (UseCompressedOops && !wide) {
1012 __ movl(as_Address(to_addr), compressed_src);
1013 } else {
1014 __ movptr(as_Address(to_addr), src->as_register());
1015 }
1016 break;
1017 case T_METADATA:
1018 // We get here to store a method pointer to the stack to pass to
1019 // a dtrace runtime call. This can't work on 64 bit with
1020 // compressed klass ptrs: T_METADATA can be a compressed klass
1021 // ptr or a 64 bit method pointer.
1022 LP64_ONLY(ShouldNotReachHere());
1023 __ movptr(as_Address(to_addr), src->as_register());
1024 break;
1025 case T_ADDRESS:
1026 __ movptr(as_Address(to_addr), src->as_register());
1027 break;
1028 case T_INT:
1029 __ movl(as_Address(to_addr), src->as_register());
1030 break;
1031
1032 case T_LONG: {
1033 Register from_lo = src->as_register_lo();
1034 Register from_hi = src->as_register_hi();
1035 #ifdef _LP64
1036 __ movptr(as_Address_lo(to_addr), from_lo);
1037 #else
1038 Register base = to_addr->base()->as_register();
1039 Register index = noreg;
1040 if (to_addr->index()->is_register()) {
1041 index = to_addr->index()->as_register();
1042 }
1043 if (base == from_lo || index == from_lo) {
1044 assert(base != from_hi, "can't be");
1045 assert(index == noreg || (index != base && index != from_hi), "can't handle this");
1046 __ movl(as_Address_hi(to_addr), from_hi);
1047 if (patch != NULL) {
1048 patching_epilog(patch, lir_patch_high, base, info);
1049 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1050 patch_code = lir_patch_low;
1051 }
1052 __ movl(as_Address_lo(to_addr), from_lo);
1053 } else {
1054 assert(index == noreg || (index != base && index != from_lo), "can't handle this");
1055 __ movl(as_Address_lo(to_addr), from_lo);
1056 if (patch != NULL) {
1057 patching_epilog(patch, lir_patch_low, base, info);
1058 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1059 patch_code = lir_patch_high;
1060 }
1061 __ movl(as_Address_hi(to_addr), from_hi);
1062 }
1063 #endif // _LP64
1064 break;
1065 }
1066
1067 case T_BYTE: // fall through
1068 case T_BOOLEAN: {
1069 Register src_reg = src->as_register();
1070 Address dst_addr = as_Address(to_addr);
1071 assert(VM_Version::is_P6() || src_reg->has_byte_register(), "must use byte registers if not P6");
1072 __ movb(dst_addr, src_reg);
1073 break;
1074 }
1075
1076 case T_CHAR: // fall through
1077 case T_SHORT:
1078 __ movw(as_Address(to_addr), src->as_register());
1079 break;
1080
1081 default:
1082 ShouldNotReachHere();
1083 }
1084 if (info != NULL) {
1085 add_debug_info_for_null_check(null_check_here, info);
1086 }
1087
1088 if (patch_code != lir_patch_none) {
1089 patching_epilog(patch, patch_code, to_addr->base()->as_register(), info);
1090 }
1091 }
1092
1093
1094 void LIR_Assembler::stack2reg(LIR_Opr src, LIR_Opr dest, BasicType type) {
1095 assert(src->is_stack(), "should not call otherwise");
1096 assert(dest->is_register(), "should not call otherwise");
1097
1098 if (dest->is_single_cpu()) {
1099 if (type == T_ARRAY || type == T_OBJECT) {
1100 __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()));
1101 __ verify_oop(dest->as_register());
1102 } else if (type == T_METADATA) {
1103 __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()));
1104 } else {
1105 __ movl(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()));
1106 }
1107
1108 } else if (dest->is_double_cpu()) {
1109 Address src_addr_LO = frame_map()->address_for_slot(src->double_stack_ix(), lo_word_offset_in_bytes);
1110 Address src_addr_HI = frame_map()->address_for_slot(src->double_stack_ix(), hi_word_offset_in_bytes);
1111 __ movptr(dest->as_register_lo(), src_addr_LO);
1112 NOT_LP64(__ movptr(dest->as_register_hi(), src_addr_HI));
1113
1114 } else if (dest->is_single_xmm()) {
1115 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix());
1116 __ movflt(dest->as_xmm_float_reg(), src_addr);
1117
1118 } else if (dest->is_double_xmm()) {
1119 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix());
1120 __ movdbl(dest->as_xmm_double_reg(), src_addr);
1121
1122 } else if (dest->is_single_fpu()) {
1123 assert(dest->fpu_regnr() == 0, "dest must be TOS");
1124 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix());
1125 __ fld_s(src_addr);
1126
1127 } else if (dest->is_double_fpu()) {
1128 assert(dest->fpu_regnrLo() == 0, "dest must be TOS");
1129 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix());
1130 __ fld_d(src_addr);
1131
1132 } else {
1133 ShouldNotReachHere();
1134 }
1135 }
1136
1137
1138 void LIR_Assembler::stack2stack(LIR_Opr src, LIR_Opr dest, BasicType type) {
1139 if (src->is_single_stack()) {
1140 if (type == T_OBJECT || type == T_ARRAY) {
1141 __ pushptr(frame_map()->address_for_slot(src ->single_stack_ix()));
1142 __ popptr (frame_map()->address_for_slot(dest->single_stack_ix()));
1143 } else {
1144 #ifndef _LP64
1145 __ pushl(frame_map()->address_for_slot(src ->single_stack_ix()));
1146 __ popl (frame_map()->address_for_slot(dest->single_stack_ix()));
1147 #else
1148 //no pushl on 64bits
1149 __ movl(rscratch1, frame_map()->address_for_slot(src ->single_stack_ix()));
1150 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), rscratch1);
1151 #endif
1152 }
1153
1154 } else if (src->is_double_stack()) {
1155 #ifdef _LP64
1156 __ pushptr(frame_map()->address_for_slot(src ->double_stack_ix()));
1157 __ popptr (frame_map()->address_for_slot(dest->double_stack_ix()));
1158 #else
1159 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 0));
1160 // push and pop the part at src + wordSize, adding wordSize for the previous push
1161 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 2 * wordSize));
1162 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 2 * wordSize));
1163 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 0));
1164 #endif // _LP64
1165
1166 } else {
1167 ShouldNotReachHere();
1168 }
1169 }
1170
1171
1172 void LIR_Assembler::mem2reg(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool wide, bool /* unaligned */) {
1173 assert(src->is_address(), "should not call otherwise");
1174 assert(dest->is_register(), "should not call otherwise");
1175
1176 LIR_Address* addr = src->as_address_ptr();
1177 Address from_addr = as_Address(addr);
1178
1179 if (addr->base()->type() == T_OBJECT) {
1180 __ verify_oop(addr->base()->as_pointer_register());
1181 }
1182
1183 switch (type) {
1184 case T_BOOLEAN: // fall through
1185 case T_BYTE: // fall through
1186 case T_CHAR: // fall through
1187 case T_SHORT:
1188 if (!VM_Version::is_P6() && !from_addr.uses(dest->as_register())) {
1189 // on pre P6 processors we may get partial register stalls
1190 // so blow away the value of to_rinfo before loading a
1191 // partial word into it. Do it here so that it precedes
1192 // the potential patch point below.
1193 __ xorptr(dest->as_register(), dest->as_register());
1194 }
1195 break;
1196 default:
1197 break;
1198 }
1199
1200 PatchingStub* patch = NULL;
1201 if (patch_code != lir_patch_none) {
1202 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1203 assert(from_addr.disp() != 0, "must have");
1204 }
1205 if (info != NULL) {
1206 add_debug_info_for_null_check_here(info);
1207 }
1208
1209 switch (type) {
1210 case T_FLOAT: {
1211 if (dest->is_single_xmm()) {
1212 __ movflt(dest->as_xmm_float_reg(), from_addr);
1213 } else {
1214 assert(dest->is_single_fpu(), "must be");
1215 assert(dest->fpu_regnr() == 0, "dest must be TOS");
1216 __ fld_s(from_addr);
1217 }
1218 break;
1219 }
1220
1221 case T_DOUBLE: {
1222 if (dest->is_double_xmm()) {
1223 __ movdbl(dest->as_xmm_double_reg(), from_addr);
1224 } else {
1225 assert(dest->is_double_fpu(), "must be");
1226 assert(dest->fpu_regnrLo() == 0, "dest must be TOS");
1227 __ fld_d(from_addr);
1228 }
1229 break;
1230 }
1231
1232 case T_OBJECT: // fall through
1233 case T_ARRAY: // fall through
1234 if (UseCompressedOops && !wide) {
1235 __ movl(dest->as_register(), from_addr);
1236 } else {
1237 __ movptr(dest->as_register(), from_addr);
1238 }
1239 break;
1240
1241 case T_ADDRESS:
1242 if (UseCompressedClassPointers && addr->disp() == oopDesc::klass_offset_in_bytes()) {
1243 __ movl(dest->as_register(), from_addr);
1244 } else {
1245 __ movptr(dest->as_register(), from_addr);
1246 }
1247 break;
1248 case T_INT:
1249 __ movl(dest->as_register(), from_addr);
1250 break;
1251
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 }
1295
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 }
1309
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 }
1320
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 }
1332
1333 default:
1334 ShouldNotReachHere();
1335 }
1336
1337 if (patch != NULL) {
1338 patching_epilog(patch, patch_code, addr->base()->as_register(), info);
1339 }
1340
1341 if (type == T_ARRAY || type == T_OBJECT) {
1342 #ifdef _LP64
1343 if (UseCompressedOops && !wide) {
1344 __ decode_heap_oop(dest->as_register());
1345 }
1346 #endif
1347 __ verify_oop(dest->as_register());
1348 } else if (type == T_ADDRESS && addr->disp() == oopDesc::klass_offset_in_bytes()) {
1349 #ifdef _LP64
1350 if (UseCompressedClassPointers) {
1351 __ decode_klass_not_null(dest->as_register());
1352 }
1353 #endif
1354 }
1355 }
1356
1357
1358 NEEDS_CLEANUP; // This could be static?
1359 Address::ScaleFactor LIR_Assembler::array_element_size(BasicType type) const {
1360 int elem_size = type2aelembytes(type);
1361 switch (elem_size) {
1362 case 1: return Address::times_1;
1363 case 2: return Address::times_2;
1364 case 4: return Address::times_4;
1365 case 8: return Address::times_8;
1366 }
1367 ShouldNotReachHere();
1368 return Address::no_scale;
1369 }
1370
1371
1372 void LIR_Assembler::emit_op3(LIR_Op3* op) {
1373 switch (op->code()) {
1374 case lir_idiv:
1375 case lir_irem:
1376 arithmetic_idiv(op->code(),
1377 op->in_opr1(),
1378 op->in_opr2(),
1379 op->in_opr3(),
1380 op->result_opr(),
1381 op->info());
1382 break;
1383 case lir_fmad:
1384 __ fmad(op->result_opr()->as_xmm_double_reg(),
1385 op->in_opr1()->as_xmm_double_reg(),
1386 op->in_opr2()->as_xmm_double_reg(),
1387 op->in_opr3()->as_xmm_double_reg());
1388 break;
1389 case lir_fmaf:
1390 __ fmaf(op->result_opr()->as_xmm_float_reg(),
1391 op->in_opr1()->as_xmm_float_reg(),
1392 op->in_opr2()->as_xmm_float_reg(),
1393 op->in_opr3()->as_xmm_float_reg());
1394 break;
1395 default: ShouldNotReachHere(); break;
1396 }
1397 }
1398
1399 void LIR_Assembler::emit_opBranch(LIR_OpBranch* op) {
1400 #ifdef ASSERT
1401 assert(op->block() == NULL || op->block()->label() == op->label(), "wrong label");
1402 if (op->block() != NULL) _branch_target_blocks.append(op->block());
1403 if (op->ublock() != NULL) _branch_target_blocks.append(op->ublock());
1404 #endif
1405
1406 if (op->cond() == lir_cond_always) {
1407 if (op->info() != NULL) add_debug_info_for_branch(op->info());
1408 __ jmp (*(op->label()));
1409 } else {
1410 Assembler::Condition acond = Assembler::zero;
1411 if (op->code() == lir_cond_float_branch) {
1412 assert(op->ublock() != NULL, "must have unordered successor");
1413 __ jcc(Assembler::parity, *(op->ublock()->label()));
1414 switch(op->cond()) {
1415 case lir_cond_equal: acond = Assembler::equal; break;
1416 case lir_cond_notEqual: acond = Assembler::notEqual; break;
1417 case lir_cond_less: acond = Assembler::below; break;
1418 case lir_cond_lessEqual: acond = Assembler::belowEqual; break;
1419 case lir_cond_greaterEqual: acond = Assembler::aboveEqual; break;
1420 case lir_cond_greater: acond = Assembler::above; break;
1421 default: ShouldNotReachHere();
1422 }
1423 } else {
1424 switch (op->cond()) {
1425 case lir_cond_equal: acond = Assembler::equal; break;
1426 case lir_cond_notEqual: acond = Assembler::notEqual; break;
1427 case lir_cond_less: acond = Assembler::less; break;
1428 case lir_cond_lessEqual: acond = Assembler::lessEqual; break;
1429 case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break;
1430 case lir_cond_greater: acond = Assembler::greater; break;
1431 case lir_cond_belowEqual: acond = Assembler::belowEqual; break;
1432 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; break;
1433 default: ShouldNotReachHere();
1434 }
1435 }
1436 __ jcc(acond,*(op->label()));
1437 }
1438 }
1439
1440 void LIR_Assembler::emit_opConvert(LIR_OpConvert* op) {
1441 LIR_Opr src = op->in_opr();
1442 LIR_Opr dest = op->result_opr();
1443
1444 switch (op->bytecode()) {
1445 case Bytecodes::_i2l:
1446 #ifdef _LP64
1447 __ movl2ptr(dest->as_register_lo(), src->as_register());
1448 #else
1449 move_regs(src->as_register(), dest->as_register_lo());
1450 move_regs(src->as_register(), dest->as_register_hi());
1451 __ sarl(dest->as_register_hi(), 31);
1452 #endif // LP64
1453 break;
1454
1455 case Bytecodes::_l2i:
1456 #ifdef _LP64
1457 __ movl(dest->as_register(), src->as_register_lo());
1458 #else
1459 move_regs(src->as_register_lo(), dest->as_register());
1460 #endif
1461 break;
1462
1463 case Bytecodes::_i2b:
1464 move_regs(src->as_register(), dest->as_register());
1465 __ sign_extend_byte(dest->as_register());
1466 break;
1467
1468 case Bytecodes::_i2c:
1469 move_regs(src->as_register(), dest->as_register());
1470 __ andl(dest->as_register(), 0xFFFF);
1471 break;
1472
1473 case Bytecodes::_i2s:
1474 move_regs(src->as_register(), dest->as_register());
1475 __ sign_extend_short(dest->as_register());
1476 break;
1477
1478
1479 case Bytecodes::_f2d:
1480 case Bytecodes::_d2f:
1481 if (dest->is_single_xmm()) {
1482 __ cvtsd2ss(dest->as_xmm_float_reg(), src->as_xmm_double_reg());
1483 } else if (dest->is_double_xmm()) {
1484 __ cvtss2sd(dest->as_xmm_double_reg(), src->as_xmm_float_reg());
1485 } else {
1486 assert(src->fpu() == dest->fpu(), "register must be equal");
1487 // do nothing (float result is rounded later through spilling)
1488 }
1489 break;
1490
1491 case Bytecodes::_i2f:
1492 case Bytecodes::_i2d:
1493 if (dest->is_single_xmm()) {
1494 __ cvtsi2ssl(dest->as_xmm_float_reg(), src->as_register());
1495 } else if (dest->is_double_xmm()) {
1496 __ cvtsi2sdl(dest->as_xmm_double_reg(), src->as_register());
1497 } else {
1498 assert(dest->fpu() == 0, "result must be on TOS");
1499 __ movl(Address(rsp, 0), src->as_register());
1500 __ fild_s(Address(rsp, 0));
1501 }
1502 break;
1503
1504 case Bytecodes::_f2i:
1505 case Bytecodes::_d2i:
1506 if (src->is_single_xmm()) {
1507 __ cvttss2sil(dest->as_register(), src->as_xmm_float_reg());
1508 } else if (src->is_double_xmm()) {
1509 __ cvttsd2sil(dest->as_register(), src->as_xmm_double_reg());
1510 } else {
1511 assert(src->fpu() == 0, "input must be on TOS");
1512 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_trunc()));
1513 __ fist_s(Address(rsp, 0));
1514 __ movl(dest->as_register(), Address(rsp, 0));
1515 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
1516 }
1517
1518 // IA32 conversion instructions do not match JLS for overflow, underflow and NaN -> fixup in stub
1519 assert(op->stub() != NULL, "stub required");
1520 __ cmpl(dest->as_register(), 0x80000000);
1521 __ jcc(Assembler::equal, *op->stub()->entry());
1522 __ bind(*op->stub()->continuation());
1523 break;
1524
1525 case Bytecodes::_l2f:
1526 case Bytecodes::_l2d:
1527 assert(!dest->is_xmm_register(), "result in xmm register not supported (no SSE instruction present)");
1528 assert(dest->fpu() == 0, "result must be on TOS");
1529
1530 __ movptr(Address(rsp, 0), src->as_register_lo());
1531 NOT_LP64(__ movl(Address(rsp, BytesPerWord), src->as_register_hi()));
1532 __ fild_d(Address(rsp, 0));
1533 // float result is rounded later through spilling
1534 break;
1535
1536 case Bytecodes::_f2l:
1537 case Bytecodes::_d2l:
1538 assert(!src->is_xmm_register(), "input in xmm register not supported (no SSE instruction present)");
1539 assert(src->fpu() == 0, "input must be on TOS");
1540 assert(dest == FrameMap::long0_opr, "runtime stub places result in these registers");
1541
1542 // instruction sequence too long to inline it here
1543 {
1544 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::fpu2long_stub_id)));
1545 }
1546 break;
1547
1548 default: ShouldNotReachHere();
1549 }
1550 }
1551
1552 void LIR_Assembler::emit_alloc_obj(LIR_OpAllocObj* op) {
1553 if (op->init_check()) {
1554 __ cmpb(Address(op->klass()->as_register(),
1555 InstanceKlass::init_state_offset()),
1556 InstanceKlass::fully_initialized);
1557 add_debug_info_for_null_check_here(op->stub()->info());
1558 __ jcc(Assembler::notEqual, *op->stub()->entry());
1559 }
1560 __ allocate_object(op->obj()->as_register(),
1561 op->tmp1()->as_register(),
1562 op->tmp2()->as_register(),
1563 op->header_size(),
1564 op->object_size(),
1565 op->klass()->as_register(),
1566 *op->stub()->entry());
1567 __ bind(*op->stub()->continuation());
1568 }
1569
1570 void LIR_Assembler::emit_alloc_array(LIR_OpAllocArray* op) {
1571 Register len = op->len()->as_register();
1572 LP64_ONLY( __ movslq(len, len); )
1573
1574 if (UseSlowPath ||
1575 (!UseFastNewObjectArray && (op->type() == T_OBJECT || op->type() == T_ARRAY)) ||
1576 (!UseFastNewTypeArray && (op->type() != T_OBJECT && op->type() != T_ARRAY))) {
1577 __ jmp(*op->stub()->entry());
1578 } else {
1579 Register tmp1 = op->tmp1()->as_register();
1580 Register tmp2 = op->tmp2()->as_register();
1581 Register tmp3 = op->tmp3()->as_register();
1582 if (len == tmp1) {
1583 tmp1 = tmp3;
1584 } else if (len == tmp2) {
1585 tmp2 = tmp3;
1586 } else if (len == tmp3) {
1587 // everything is ok
1588 } else {
1589 __ mov(tmp3, len);
1590 }
1591 __ allocate_array(op->obj()->as_register(),
1592 len,
1593 tmp1,
1594 tmp2,
1595 arrayOopDesc::header_size(op->type()),
1596 array_element_size(op->type()),
1597 op->klass()->as_register(),
1598 *op->stub()->entry());
1599 }
1600 __ bind(*op->stub()->continuation());
1601 }
1602
1603 void LIR_Assembler::type_profile_helper(Register mdo,
1604 ciMethodData *md, ciProfileData *data,
1605 Register recv, Label* update_done) {
1606 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) {
1607 Label next_test;
1608 // See if the receiver is receiver[n].
1609 __ cmpptr(recv, Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i))));
1610 __ jccb(Assembler::notEqual, next_test);
1611 Address data_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i)));
1612 __ addptr(data_addr, DataLayout::counter_increment);
1613 __ jmp(*update_done);
1614 __ bind(next_test);
1615 }
1616
1617 // Didn't find receiver; find next empty slot and fill it in
1618 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) {
1619 Label next_test;
1620 Address recv_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i)));
1621 __ cmpptr(recv_addr, (intptr_t)NULL_WORD);
1622 __ jccb(Assembler::notEqual, next_test);
1623 __ movptr(recv_addr, recv);
1624 __ movptr(Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i))), DataLayout::counter_increment);
1625 __ jmp(*update_done);
1626 __ bind(next_test);
1627 }
1628 }
1629
1630 void LIR_Assembler::emit_typecheck_helper(LIR_OpTypeCheck *op, Label* success, Label* failure, Label* obj_is_null) {
1631 // we always need a stub for the failure case.
1632 CodeStub* stub = op->stub();
1633 Register obj = op->object()->as_register();
1634 Register k_RInfo = op->tmp1()->as_register();
1635 Register klass_RInfo = op->tmp2()->as_register();
1636 Register dst = op->result_opr()->as_register();
1637 ciKlass* k = op->klass();
1638 Register Rtmp1 = noreg;
1639
1640 // check if it needs to be profiled
1641 ciMethodData* md = NULL;
1642 ciProfileData* data = NULL;
1643
1644 if (op->should_profile()) {
1645 ciMethod* method = op->profiled_method();
1646 assert(method != NULL, "Should have method");
1647 int bci = op->profiled_bci();
1648 md = method->method_data_or_null();
1649 assert(md != NULL, "Sanity");
1650 data = md->bci_to_data(bci);
1651 assert(data != NULL, "need data for type check");
1652 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check");
1653 }
1654 Label profile_cast_success, profile_cast_failure;
1655 Label *success_target = op->should_profile() ? &profile_cast_success : success;
1656 Label *failure_target = op->should_profile() ? &profile_cast_failure : failure;
1657
1658 if (obj == k_RInfo) {
1659 k_RInfo = dst;
1660 } else if (obj == klass_RInfo) {
1661 klass_RInfo = dst;
1662 }
1663 if (k->is_loaded() && !UseCompressedClassPointers) {
1664 select_different_registers(obj, dst, k_RInfo, klass_RInfo);
1665 } else {
1666 Rtmp1 = op->tmp3()->as_register();
1667 select_different_registers(obj, dst, k_RInfo, klass_RInfo, Rtmp1);
1668 }
1669
1670 assert_different_registers(obj, k_RInfo, klass_RInfo);
1671
1672 __ cmpptr(obj, (int32_t)NULL_WORD);
1673 if (op->should_profile()) {
1674 Label not_null;
1675 __ jccb(Assembler::notEqual, not_null);
1676 // Object is null; update MDO and exit
1677 Register mdo = klass_RInfo;
1678 __ mov_metadata(mdo, md->constant_encoding());
1679 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::header_offset()));
1680 int header_bits = DataLayout::flag_mask_to_header_mask(BitData::null_seen_byte_constant());
1681 __ orl(data_addr, header_bits);
1682 __ jmp(*obj_is_null);
1683 __ bind(not_null);
1684 } else {
1685 __ jcc(Assembler::equal, *obj_is_null);
1686 }
1687
1688 if (!k->is_loaded()) {
1689 klass2reg_with_patching(k_RInfo, op->info_for_patch());
1690 } else {
1691 #ifdef _LP64
1692 __ mov_metadata(k_RInfo, k->constant_encoding());
1693 #endif // _LP64
1694 }
1695 __ verify_oop(obj);
1696
1697 if (op->fast_check()) {
1698 // get object class
1699 // not a safepoint as obj null check happens earlier
1700 #ifdef _LP64
1701 if (UseCompressedClassPointers) {
1702 __ load_klass(Rtmp1, obj);
1703 __ cmpptr(k_RInfo, Rtmp1);
1704 } else {
1705 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes()));
1706 }
1707 #else
1708 if (k->is_loaded()) {
1709 __ cmpklass(Address(obj, oopDesc::klass_offset_in_bytes()), k->constant_encoding());
1710 } else {
1711 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes()));
1712 }
1713 #endif
1714 __ jcc(Assembler::notEqual, *failure_target);
1715 // successful cast, fall through to profile or jump
1716 } else {
1717 // get object class
1718 // not a safepoint as obj null check happens earlier
1719 __ load_klass(klass_RInfo, obj);
1720 if (k->is_loaded()) {
1721 // See if we get an immediate positive hit
1722 #ifdef _LP64
1723 __ cmpptr(k_RInfo, Address(klass_RInfo, k->super_check_offset()));
1724 #else
1725 __ cmpklass(Address(klass_RInfo, k->super_check_offset()), k->constant_encoding());
1726 #endif // _LP64
1727 if ((juint)in_bytes(Klass::secondary_super_cache_offset()) != k->super_check_offset()) {
1728 __ jcc(Assembler::notEqual, *failure_target);
1729 // successful cast, fall through to profile or jump
1730 } else {
1731 // See if we get an immediate positive hit
1732 __ jcc(Assembler::equal, *success_target);
1733 // check for self
1734 #ifdef _LP64
1735 __ cmpptr(klass_RInfo, k_RInfo);
1736 #else
1737 __ cmpklass(klass_RInfo, k->constant_encoding());
1738 #endif // _LP64
1739 __ jcc(Assembler::equal, *success_target);
1740
1741 __ push(klass_RInfo);
1742 #ifdef _LP64
1743 __ push(k_RInfo);
1744 #else
1745 __ pushklass(k->constant_encoding());
1746 #endif // _LP64
1747 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
1748 __ pop(klass_RInfo);
1749 __ pop(klass_RInfo);
1750 // result is a boolean
1751 __ cmpl(klass_RInfo, 0);
1752 __ jcc(Assembler::equal, *failure_target);
1753 // successful cast, fall through to profile or jump
1754 }
1755 } else {
1756 // perform the fast part of the checking logic
1757 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL);
1758 // call out-of-line instance of __ check_klass_subtype_slow_path(...):
1759 __ push(klass_RInfo);
1760 __ push(k_RInfo);
1761 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
1762 __ pop(klass_RInfo);
1763 __ pop(k_RInfo);
1764 // result is a boolean
1765 __ cmpl(k_RInfo, 0);
1766 __ jcc(Assembler::equal, *failure_target);
1767 // successful cast, fall through to profile or jump
1768 }
1769 }
1770 if (op->should_profile()) {
1771 Register mdo = klass_RInfo, recv = k_RInfo;
1772 __ bind(profile_cast_success);
1773 __ mov_metadata(mdo, md->constant_encoding());
1774 __ load_klass(recv, obj);
1775 Label update_done;
1776 type_profile_helper(mdo, md, data, recv, success);
1777 __ jmp(*success);
1778
1779 __ bind(profile_cast_failure);
1780 __ mov_metadata(mdo, md->constant_encoding());
1781 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
1782 __ subptr(counter_addr, DataLayout::counter_increment);
1783 __ jmp(*failure);
1784 }
1785 __ jmp(*success);
1786 }
1787
1788
1789 void LIR_Assembler::emit_opTypeCheck(LIR_OpTypeCheck* op) {
1790 LIR_Code code = op->code();
1791 if (code == lir_store_check) {
1792 Register value = op->object()->as_register();
1793 Register array = op->array()->as_register();
1794 Register k_RInfo = op->tmp1()->as_register();
1795 Register klass_RInfo = op->tmp2()->as_register();
1796 Register Rtmp1 = op->tmp3()->as_register();
1797
1798 CodeStub* stub = op->stub();
1799
1800 // check if it needs to be profiled
1801 ciMethodData* md = NULL;
1802 ciProfileData* data = NULL;
1803
1804 if (op->should_profile()) {
1805 ciMethod* method = op->profiled_method();
1806 assert(method != NULL, "Should have method");
1807 int bci = op->profiled_bci();
1808 md = method->method_data_or_null();
1809 assert(md != NULL, "Sanity");
1810 data = md->bci_to_data(bci);
1811 assert(data != NULL, "need data for type check");
1812 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check");
1813 }
1814 Label profile_cast_success, profile_cast_failure, done;
1815 Label *success_target = op->should_profile() ? &profile_cast_success : &done;
1816 Label *failure_target = op->should_profile() ? &profile_cast_failure : stub->entry();
1817
1818 __ cmpptr(value, (int32_t)NULL_WORD);
1819 if (op->should_profile()) {
1820 Label not_null;
1821 __ jccb(Assembler::notEqual, not_null);
1822 // Object is null; update MDO and exit
1823 Register mdo = klass_RInfo;
1824 __ mov_metadata(mdo, md->constant_encoding());
1825 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::header_offset()));
1826 int header_bits = DataLayout::flag_mask_to_header_mask(BitData::null_seen_byte_constant());
1827 __ orl(data_addr, header_bits);
1828 __ jmp(done);
1829 __ bind(not_null);
1830 } else {
1831 __ jcc(Assembler::equal, done);
1832 }
1833
1834 add_debug_info_for_null_check_here(op->info_for_exception());
1835 __ load_klass(k_RInfo, array);
1836 __ load_klass(klass_RInfo, value);
1837
1838 // get instance klass (it's already uncompressed)
1839 __ movptr(k_RInfo, Address(k_RInfo, ObjArrayKlass::element_klass_offset()));
1840 // perform the fast part of the checking logic
1841 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL);
1842 // call out-of-line instance of __ check_klass_subtype_slow_path(...):
1843 __ push(klass_RInfo);
1844 __ push(k_RInfo);
1845 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
1846 __ pop(klass_RInfo);
1847 __ pop(k_RInfo);
1848 // result is a boolean
1849 __ cmpl(k_RInfo, 0);
1850 __ jcc(Assembler::equal, *failure_target);
1851 // fall through to the success case
1852
1853 if (op->should_profile()) {
1854 Register mdo = klass_RInfo, recv = k_RInfo;
1855 __ bind(profile_cast_success);
1856 __ mov_metadata(mdo, md->constant_encoding());
1857 __ load_klass(recv, value);
1858 Label update_done;
1859 type_profile_helper(mdo, md, data, recv, &done);
1860 __ jmpb(done);
1861
1862 __ bind(profile_cast_failure);
1863 __ mov_metadata(mdo, md->constant_encoding());
1864 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
1865 __ subptr(counter_addr, DataLayout::counter_increment);
1866 __ jmp(*stub->entry());
1867 }
1868
1869 __ bind(done);
1870 } else
1871 if (code == lir_checkcast) {
1872 Register obj = op->object()->as_register();
1873 Register dst = op->result_opr()->as_register();
1874 Label success;
1875 emit_typecheck_helper(op, &success, op->stub()->entry(), &success);
1876 __ bind(success);
1877 if (dst != obj) {
1878 __ mov(dst, obj);
1879 }
1880 } else
1881 if (code == lir_instanceof) {
1882 Register obj = op->object()->as_register();
1883 Register dst = op->result_opr()->as_register();
1884 Label success, failure, done;
1885 emit_typecheck_helper(op, &success, &failure, &failure);
1886 __ bind(failure);
1887 __ xorptr(dst, dst);
1888 __ jmpb(done);
1889 __ bind(success);
1890 __ movptr(dst, 1);
1891 __ bind(done);
1892 } else {
1893 ShouldNotReachHere();
1894 }
1895
1896 }
1897
1898
1899 void LIR_Assembler::emit_compare_and_swap(LIR_OpCompareAndSwap* op) {
1900 if (LP64_ONLY(false &&) op->code() == lir_cas_long && VM_Version::supports_cx8()) {
1901 assert(op->cmp_value()->as_register_lo() == rax, "wrong register");
1902 assert(op->cmp_value()->as_register_hi() == rdx, "wrong register");
1903 assert(op->new_value()->as_register_lo() == rbx, "wrong register");
1904 assert(op->new_value()->as_register_hi() == rcx, "wrong register");
1905 Register addr = op->addr()->as_register();
1906 if (os::is_MP()) {
1907 __ lock();
1908 }
1909 NOT_LP64(__ cmpxchg8(Address(addr, 0)));
1910
1911 } else if (op->code() == lir_cas_int || op->code() == lir_cas_obj ) {
1912 NOT_LP64(assert(op->addr()->is_single_cpu(), "must be single");)
1913 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo());
1914 Register newval = op->new_value()->as_register();
1915 Register cmpval = op->cmp_value()->as_register();
1916 assert(cmpval == rax, "wrong register");
1917 assert(newval != NULL, "new val must be register");
1918 assert(cmpval != newval, "cmp and new values must be in different registers");
1919 assert(cmpval != addr, "cmp and addr must be in different registers");
1920 assert(newval != addr, "new value and addr must be in different registers");
1921
1922 if ( op->code() == lir_cas_obj) {
1923 #ifdef _LP64
1924 if (UseCompressedOops) {
1925 __ encode_heap_oop(cmpval);
1926 __ mov(rscratch1, newval);
1927 __ encode_heap_oop(rscratch1);
1928 if (os::is_MP()) {
1929 __ lock();
1930 }
1931 // cmpval (rax) is implicitly used by this instruction
1932 __ cmpxchgl(rscratch1, Address(addr, 0));
1933 } else
1934 #endif
1935 {
1936 if (os::is_MP()) {
1937 __ lock();
1938 }
1939 __ cmpxchgptr(newval, Address(addr, 0));
1940 }
1941 } else {
1942 assert(op->code() == lir_cas_int, "lir_cas_int expected");
1943 if (os::is_MP()) {
1944 __ lock();
1945 }
1946 __ cmpxchgl(newval, Address(addr, 0));
1947 }
1948 #ifdef _LP64
1949 } else if (op->code() == lir_cas_long) {
1950 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo());
1951 Register newval = op->new_value()->as_register_lo();
1952 Register cmpval = op->cmp_value()->as_register_lo();
1953 assert(cmpval == rax, "wrong register");
1954 assert(newval != NULL, "new val must be register");
1955 assert(cmpval != newval, "cmp and new values must be in different registers");
1956 assert(cmpval != addr, "cmp and addr must be in different registers");
1957 assert(newval != addr, "new value and addr must be in different registers");
1958 if (os::is_MP()) {
1959 __ lock();
1960 }
1961 __ cmpxchgq(newval, Address(addr, 0));
1962 #endif // _LP64
1963 } else {
1964 Unimplemented();
1965 }
1966 }
1967
1968 void LIR_Assembler::cmove(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result, BasicType type) {
1969 Assembler::Condition acond, ncond;
1970 switch (condition) {
1971 case lir_cond_equal: acond = Assembler::equal; ncond = Assembler::notEqual; break;
1972 case lir_cond_notEqual: acond = Assembler::notEqual; ncond = Assembler::equal; break;
1973 case lir_cond_less: acond = Assembler::less; ncond = Assembler::greaterEqual; break;
1974 case lir_cond_lessEqual: acond = Assembler::lessEqual; ncond = Assembler::greater; break;
1975 case lir_cond_greaterEqual: acond = Assembler::greaterEqual; ncond = Assembler::less; break;
1976 case lir_cond_greater: acond = Assembler::greater; ncond = Assembler::lessEqual; break;
1977 case lir_cond_belowEqual: acond = Assembler::belowEqual; ncond = Assembler::above; break;
1978 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; ncond = Assembler::below; break;
1979 default: acond = Assembler::equal; ncond = Assembler::notEqual;
1980 ShouldNotReachHere();
1981 }
1982
1983 if (opr1->is_cpu_register()) {
1984 reg2reg(opr1, result);
1985 } else if (opr1->is_stack()) {
1986 stack2reg(opr1, result, result->type());
1987 } else if (opr1->is_constant()) {
1988 const2reg(opr1, result, lir_patch_none, NULL);
1989 } else {
1990 ShouldNotReachHere();
1991 }
1992
1993 if (VM_Version::supports_cmov() && !opr2->is_constant()) {
1994 // optimized version that does not require a branch
1995 if (opr2->is_single_cpu()) {
1996 assert(opr2->cpu_regnr() != result->cpu_regnr(), "opr2 already overwritten by previous move");
1997 __ cmov(ncond, result->as_register(), opr2->as_register());
1998 } else if (opr2->is_double_cpu()) {
1999 assert(opr2->cpu_regnrLo() != result->cpu_regnrLo() && opr2->cpu_regnrLo() != result->cpu_regnrHi(), "opr2 already overwritten by previous move");
2000 assert(opr2->cpu_regnrHi() != result->cpu_regnrLo() && opr2->cpu_regnrHi() != result->cpu_regnrHi(), "opr2 already overwritten by previous move");
2001 __ cmovptr(ncond, result->as_register_lo(), opr2->as_register_lo());
2002 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), opr2->as_register_hi());)
2003 } else if (opr2->is_single_stack()) {
2004 __ cmovl(ncond, result->as_register(), frame_map()->address_for_slot(opr2->single_stack_ix()));
2005 } else if (opr2->is_double_stack()) {
2006 __ cmovptr(ncond, result->as_register_lo(), frame_map()->address_for_slot(opr2->double_stack_ix(), lo_word_offset_in_bytes));
2007 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), frame_map()->address_for_slot(opr2->double_stack_ix(), hi_word_offset_in_bytes));)
2008 } else {
2009 ShouldNotReachHere();
2010 }
2011
2012 } else {
2013 Label skip;
2014 __ jcc (acond, skip);
2015 if (opr2->is_cpu_register()) {
2016 reg2reg(opr2, result);
2017 } else if (opr2->is_stack()) {
2018 stack2reg(opr2, result, result->type());
2019 } else if (opr2->is_constant()) {
2020 const2reg(opr2, result, lir_patch_none, NULL);
2021 } else {
2022 ShouldNotReachHere();
2023 }
2024 __ bind(skip);
2025 }
2026 }
2027
2028
2029 void LIR_Assembler::arith_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dest, CodeEmitInfo* info, bool pop_fpu_stack) {
2030 assert(info == NULL, "should never be used, idiv/irem and ldiv/lrem not handled by this method");
2031
2032 if (left->is_single_cpu()) {
2033 assert(left == dest, "left and dest must be equal");
2034 Register lreg = left->as_register();
2035
2036 if (right->is_single_cpu()) {
2037 // cpu register - cpu register
2038 Register rreg = right->as_register();
2039 switch (code) {
2040 case lir_add: __ addl (lreg, rreg); break;
2041 case lir_sub: __ subl (lreg, rreg); break;
2042 case lir_mul: __ imull(lreg, rreg); break;
2043 default: ShouldNotReachHere();
2044 }
2045
2046 } else if (right->is_stack()) {
2047 // cpu register - stack
2048 Address raddr = frame_map()->address_for_slot(right->single_stack_ix());
2049 switch (code) {
2050 case lir_add: __ addl(lreg, raddr); break;
2051 case lir_sub: __ subl(lreg, raddr); break;
2052 default: ShouldNotReachHere();
2053 }
2054
2055 } else if (right->is_constant()) {
2056 // cpu register - constant
2057 jint c = right->as_constant_ptr()->as_jint();
2058 switch (code) {
2059 case lir_add: {
2060 __ incrementl(lreg, c);
2061 break;
2062 }
2063 case lir_sub: {
2064 __ decrementl(lreg, c);
2065 break;
2066 }
2067 default: ShouldNotReachHere();
2068 }
2069
2070 } else {
2071 ShouldNotReachHere();
2072 }
2073
2074 } else if (left->is_double_cpu()) {
2075 assert(left == dest, "left and dest must be equal");
2076 Register lreg_lo = left->as_register_lo();
2077 Register lreg_hi = left->as_register_hi();
2078
2079 if (right->is_double_cpu()) {
2080 // cpu register - cpu register
2081 Register rreg_lo = right->as_register_lo();
2082 Register rreg_hi = right->as_register_hi();
2083 NOT_LP64(assert_different_registers(lreg_lo, lreg_hi, rreg_lo, rreg_hi));
2084 LP64_ONLY(assert_different_registers(lreg_lo, rreg_lo));
2085 switch (code) {
2086 case lir_add:
2087 __ addptr(lreg_lo, rreg_lo);
2088 NOT_LP64(__ adcl(lreg_hi, rreg_hi));
2089 break;
2090 case lir_sub:
2091 __ subptr(lreg_lo, rreg_lo);
2092 NOT_LP64(__ sbbl(lreg_hi, rreg_hi));
2093 break;
2094 case lir_mul:
2095 #ifdef _LP64
2096 __ imulq(lreg_lo, rreg_lo);
2097 #else
2098 assert(lreg_lo == rax && lreg_hi == rdx, "must be");
2099 __ imull(lreg_hi, rreg_lo);
2100 __ imull(rreg_hi, lreg_lo);
2101 __ addl (rreg_hi, lreg_hi);
2102 __ mull (rreg_lo);
2103 __ addl (lreg_hi, rreg_hi);
2104 #endif // _LP64
2105 break;
2106 default:
2107 ShouldNotReachHere();
2108 }
2109
2110 } else if (right->is_constant()) {
2111 // cpu register - constant
2112 #ifdef _LP64
2113 jlong c = right->as_constant_ptr()->as_jlong_bits();
2114 __ movptr(r10, (intptr_t) c);
2115 switch (code) {
2116 case lir_add:
2117 __ addptr(lreg_lo, r10);
2118 break;
2119 case lir_sub:
2120 __ subptr(lreg_lo, r10);
2121 break;
2122 default:
2123 ShouldNotReachHere();
2124 }
2125 #else
2126 jint c_lo = right->as_constant_ptr()->as_jint_lo();
2127 jint c_hi = right->as_constant_ptr()->as_jint_hi();
2128 switch (code) {
2129 case lir_add:
2130 __ addptr(lreg_lo, c_lo);
2131 __ adcl(lreg_hi, c_hi);
2132 break;
2133 case lir_sub:
2134 __ subptr(lreg_lo, c_lo);
2135 __ sbbl(lreg_hi, c_hi);
2136 break;
2137 default:
2138 ShouldNotReachHere();
2139 }
2140 #endif // _LP64
2141
2142 } else {
2143 ShouldNotReachHere();
2144 }
2145
2146 } else if (left->is_single_xmm()) {
2147 assert(left == dest, "left and dest must be equal");
2148 XMMRegister lreg = left->as_xmm_float_reg();
2149
2150 if (right->is_single_xmm()) {
2151 XMMRegister rreg = right->as_xmm_float_reg();
2152 switch (code) {
2153 case lir_add: __ addss(lreg, rreg); break;
2154 case lir_sub: __ subss(lreg, rreg); break;
2155 case lir_mul_strictfp: // fall through
2156 case lir_mul: __ mulss(lreg, rreg); break;
2157 case lir_div_strictfp: // fall through
2158 case lir_div: __ divss(lreg, rreg); break;
2159 default: ShouldNotReachHere();
2160 }
2161 } else {
2162 Address raddr;
2163 if (right->is_single_stack()) {
2164 raddr = frame_map()->address_for_slot(right->single_stack_ix());
2165 } else if (right->is_constant()) {
2166 // hack for now
2167 raddr = __ as_Address(InternalAddress(float_constant(right->as_jfloat())));
2168 } else {
2169 ShouldNotReachHere();
2170 }
2171 switch (code) {
2172 case lir_add: __ addss(lreg, raddr); break;
2173 case lir_sub: __ subss(lreg, raddr); break;
2174 case lir_mul_strictfp: // fall through
2175 case lir_mul: __ mulss(lreg, raddr); break;
2176 case lir_div_strictfp: // fall through
2177 case lir_div: __ divss(lreg, raddr); break;
2178 default: ShouldNotReachHere();
2179 }
2180 }
2181
2182 } else if (left->is_double_xmm()) {
2183 assert(left == dest, "left and dest must be equal");
2184
2185 XMMRegister lreg = left->as_xmm_double_reg();
2186 if (right->is_double_xmm()) {
2187 XMMRegister rreg = right->as_xmm_double_reg();
2188 switch (code) {
2189 case lir_add: __ addsd(lreg, rreg); break;
2190 case lir_sub: __ subsd(lreg, rreg); break;
2191 case lir_mul_strictfp: // fall through
2192 case lir_mul: __ mulsd(lreg, rreg); break;
2193 case lir_div_strictfp: // fall through
2194 case lir_div: __ divsd(lreg, rreg); break;
2195 default: ShouldNotReachHere();
2196 }
2197 } else {
2198 Address raddr;
2199 if (right->is_double_stack()) {
2200 raddr = frame_map()->address_for_slot(right->double_stack_ix());
2201 } else if (right->is_constant()) {
2202 // hack for now
2203 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble())));
2204 } else {
2205 ShouldNotReachHere();
2206 }
2207 switch (code) {
2208 case lir_add: __ addsd(lreg, raddr); break;
2209 case lir_sub: __ subsd(lreg, raddr); break;
2210 case lir_mul_strictfp: // fall through
2211 case lir_mul: __ mulsd(lreg, raddr); break;
2212 case lir_div_strictfp: // fall through
2213 case lir_div: __ divsd(lreg, raddr); break;
2214 default: ShouldNotReachHere();
2215 }
2216 }
2217
2218 } else if (left->is_single_fpu()) {
2219 assert(dest->is_single_fpu(), "fpu stack allocation required");
2220
2221 if (right->is_single_fpu()) {
2222 arith_fpu_implementation(code, left->fpu_regnr(), right->fpu_regnr(), dest->fpu_regnr(), pop_fpu_stack);
2223
2224 } else {
2225 assert(left->fpu_regnr() == 0, "left must be on TOS");
2226 assert(dest->fpu_regnr() == 0, "dest must be on TOS");
2227
2228 Address raddr;
2229 if (right->is_single_stack()) {
2230 raddr = frame_map()->address_for_slot(right->single_stack_ix());
2231 } else if (right->is_constant()) {
2232 address const_addr = float_constant(right->as_jfloat());
2233 assert(const_addr != NULL, "incorrect float/double constant maintainance");
2234 // hack for now
2235 raddr = __ as_Address(InternalAddress(const_addr));
2236 } else {
2237 ShouldNotReachHere();
2238 }
2239
2240 switch (code) {
2241 case lir_add: __ fadd_s(raddr); break;
2242 case lir_sub: __ fsub_s(raddr); break;
2243 case lir_mul_strictfp: // fall through
2244 case lir_mul: __ fmul_s(raddr); break;
2245 case lir_div_strictfp: // fall through
2246 case lir_div: __ fdiv_s(raddr); break;
2247 default: ShouldNotReachHere();
2248 }
2249 }
2250
2251 } else if (left->is_double_fpu()) {
2252 assert(dest->is_double_fpu(), "fpu stack allocation required");
2253
2254 if (code == lir_mul_strictfp || code == lir_div_strictfp) {
2255 // Double values require special handling for strictfp mul/div on x86
2256 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1()));
2257 __ fmulp(left->fpu_regnrLo() + 1);
2258 }
2259
2260 if (right->is_double_fpu()) {
2261 arith_fpu_implementation(code, left->fpu_regnrLo(), right->fpu_regnrLo(), dest->fpu_regnrLo(), pop_fpu_stack);
2262
2263 } else {
2264 assert(left->fpu_regnrLo() == 0, "left must be on TOS");
2265 assert(dest->fpu_regnrLo() == 0, "dest must be on TOS");
2266
2267 Address raddr;
2268 if (right->is_double_stack()) {
2269 raddr = frame_map()->address_for_slot(right->double_stack_ix());
2270 } else if (right->is_constant()) {
2271 // hack for now
2272 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble())));
2273 } else {
2274 ShouldNotReachHere();
2275 }
2276
2277 switch (code) {
2278 case lir_add: __ fadd_d(raddr); break;
2279 case lir_sub: __ fsub_d(raddr); break;
2280 case lir_mul_strictfp: // fall through
2281 case lir_mul: __ fmul_d(raddr); break;
2282 case lir_div_strictfp: // fall through
2283 case lir_div: __ fdiv_d(raddr); break;
2284 default: ShouldNotReachHere();
2285 }
2286 }
2287
2288 if (code == lir_mul_strictfp || code == lir_div_strictfp) {
2289 // Double values require special handling for strictfp mul/div on x86
2290 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2()));
2291 __ fmulp(dest->fpu_regnrLo() + 1);
2292 }
2293
2294 } else if (left->is_single_stack() || left->is_address()) {
2295 assert(left == dest, "left and dest must be equal");
2296
2297 Address laddr;
2298 if (left->is_single_stack()) {
2299 laddr = frame_map()->address_for_slot(left->single_stack_ix());
2300 } else if (left->is_address()) {
2301 laddr = as_Address(left->as_address_ptr());
2302 } else {
2303 ShouldNotReachHere();
2304 }
2305
2306 if (right->is_single_cpu()) {
2307 Register rreg = right->as_register();
2308 switch (code) {
2309 case lir_add: __ addl(laddr, rreg); break;
2310 case lir_sub: __ subl(laddr, rreg); break;
2311 default: ShouldNotReachHere();
2312 }
2313 } else if (right->is_constant()) {
2314 jint c = right->as_constant_ptr()->as_jint();
2315 switch (code) {
2316 case lir_add: {
2317 __ incrementl(laddr, c);
2318 break;
2319 }
2320 case lir_sub: {
2321 __ decrementl(laddr, c);
2322 break;
2323 }
2324 default: ShouldNotReachHere();
2325 }
2326 } else {
2327 ShouldNotReachHere();
2328 }
2329
2330 } else {
2331 ShouldNotReachHere();
2332 }
2333 }
2334
2335 void LIR_Assembler::arith_fpu_implementation(LIR_Code code, int left_index, int right_index, int dest_index, bool pop_fpu_stack) {
2336 assert(pop_fpu_stack || (left_index == dest_index || right_index == dest_index), "invalid LIR");
2337 assert(!pop_fpu_stack || (left_index - 1 == dest_index || right_index - 1 == dest_index), "invalid LIR");
2338 assert(left_index == 0 || right_index == 0, "either must be on top of stack");
2339
2340 bool left_is_tos = (left_index == 0);
2341 bool dest_is_tos = (dest_index == 0);
2342 int non_tos_index = (left_is_tos ? right_index : left_index);
2343
2344 switch (code) {
2345 case lir_add:
2346 if (pop_fpu_stack) __ faddp(non_tos_index);
2347 else if (dest_is_tos) __ fadd (non_tos_index);
2348 else __ fadda(non_tos_index);
2349 break;
2350
2351 case lir_sub:
2352 if (left_is_tos) {
2353 if (pop_fpu_stack) __ fsubrp(non_tos_index);
2354 else if (dest_is_tos) __ fsub (non_tos_index);
2355 else __ fsubra(non_tos_index);
2356 } else {
2357 if (pop_fpu_stack) __ fsubp (non_tos_index);
2358 else if (dest_is_tos) __ fsubr (non_tos_index);
2359 else __ fsuba (non_tos_index);
2360 }
2361 break;
2362
2363 case lir_mul_strictfp: // fall through
2364 case lir_mul:
2365 if (pop_fpu_stack) __ fmulp(non_tos_index);
2366 else if (dest_is_tos) __ fmul (non_tos_index);
2367 else __ fmula(non_tos_index);
2368 break;
2369
2370 case lir_div_strictfp: // fall through
2371 case lir_div:
2372 if (left_is_tos) {
2373 if (pop_fpu_stack) __ fdivrp(non_tos_index);
2374 else if (dest_is_tos) __ fdiv (non_tos_index);
2375 else __ fdivra(non_tos_index);
2376 } else {
2377 if (pop_fpu_stack) __ fdivp (non_tos_index);
2378 else if (dest_is_tos) __ fdivr (non_tos_index);
2379 else __ fdiva (non_tos_index);
2380 }
2381 break;
2382
2383 case lir_rem:
2384 assert(left_is_tos && dest_is_tos && right_index == 1, "must be guaranteed by FPU stack allocation");
2385 __ fremr(noreg);
2386 break;
2387
2388 default:
2389 ShouldNotReachHere();
2390 }
2391 }
2392
2393
2394 void LIR_Assembler::intrinsic_op(LIR_Code code, LIR_Opr value, LIR_Opr unused, LIR_Opr dest, LIR_Op* op) {
2395 if (value->is_double_xmm()) {
2396 switch(code) {
2397 case lir_abs :
2398 {
2399 if (dest->as_xmm_double_reg() != value->as_xmm_double_reg()) {
2400 __ movdbl(dest->as_xmm_double_reg(), value->as_xmm_double_reg());
2401 }
2402 __ andpd(dest->as_xmm_double_reg(),
2403 ExternalAddress((address)double_signmask_pool));
2404 }
2405 break;
2406
2407 case lir_sqrt: __ sqrtsd(dest->as_xmm_double_reg(), value->as_xmm_double_reg()); break;
2408 // all other intrinsics are not available in the SSE instruction set, so FPU is used
2409 default : ShouldNotReachHere();
2410 }
2411
2412 } else if (value->is_double_fpu()) {
2413 assert(value->fpu_regnrLo() == 0 && dest->fpu_regnrLo() == 0, "both must be on TOS");
2414 switch(code) {
2415 case lir_abs : __ fabs() ; break;
2416 case lir_sqrt : __ fsqrt(); break;
2417 default : ShouldNotReachHere();
2418 }
2419 } else {
2420 Unimplemented();
2421 }
2422 }
2423
2424 void LIR_Assembler::logic_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst) {
2425 // assert(left->destroys_register(), "check");
2426 if (left->is_single_cpu()) {
2427 Register reg = left->as_register();
2428 if (right->is_constant()) {
2429 int val = right->as_constant_ptr()->as_jint();
2430 switch (code) {
2431 case lir_logic_and: __ andl (reg, val); break;
2432 case lir_logic_or: __ orl (reg, val); break;
2433 case lir_logic_xor: __ xorl (reg, val); break;
2434 default: ShouldNotReachHere();
2435 }
2436 } else if (right->is_stack()) {
2437 // added support for stack operands
2438 Address raddr = frame_map()->address_for_slot(right->single_stack_ix());
2439 switch (code) {
2440 case lir_logic_and: __ andl (reg, raddr); break;
2441 case lir_logic_or: __ orl (reg, raddr); break;
2442 case lir_logic_xor: __ xorl (reg, raddr); break;
2443 default: ShouldNotReachHere();
2444 }
2445 } else {
2446 Register rright = right->as_register();
2447 switch (code) {
2448 case lir_logic_and: __ andptr (reg, rright); break;
2449 case lir_logic_or : __ orptr (reg, rright); break;
2450 case lir_logic_xor: __ xorptr (reg, rright); break;
2451 default: ShouldNotReachHere();
2452 }
2453 }
2454 move_regs(reg, dst->as_register());
2455 } else {
2456 Register l_lo = left->as_register_lo();
2457 Register l_hi = left->as_register_hi();
2458 if (right->is_constant()) {
2459 #ifdef _LP64
2460 __ mov64(rscratch1, right->as_constant_ptr()->as_jlong());
2461 switch (code) {
2462 case lir_logic_and:
2463 __ andq(l_lo, rscratch1);
2464 break;
2465 case lir_logic_or:
2466 __ orq(l_lo, rscratch1);
2467 break;
2468 case lir_logic_xor:
2469 __ xorq(l_lo, rscratch1);
2470 break;
2471 default: ShouldNotReachHere();
2472 }
2473 #else
2474 int r_lo = right->as_constant_ptr()->as_jint_lo();
2475 int r_hi = right->as_constant_ptr()->as_jint_hi();
2476 switch (code) {
2477 case lir_logic_and:
2478 __ andl(l_lo, r_lo);
2479 __ andl(l_hi, r_hi);
2480 break;
2481 case lir_logic_or:
2482 __ orl(l_lo, r_lo);
2483 __ orl(l_hi, r_hi);
2484 break;
2485 case lir_logic_xor:
2486 __ xorl(l_lo, r_lo);
2487 __ xorl(l_hi, r_hi);
2488 break;
2489 default: ShouldNotReachHere();
2490 }
2491 #endif // _LP64
2492 } else {
2493 #ifdef _LP64
2494 Register r_lo;
2495 if (right->type() == T_OBJECT || right->type() == T_ARRAY) {
2496 r_lo = right->as_register();
2497 } else {
2498 r_lo = right->as_register_lo();
2499 }
2500 #else
2501 Register r_lo = right->as_register_lo();
2502 Register r_hi = right->as_register_hi();
2503 assert(l_lo != r_hi, "overwriting registers");
2504 #endif
2505 switch (code) {
2506 case lir_logic_and:
2507 __ andptr(l_lo, r_lo);
2508 NOT_LP64(__ andptr(l_hi, r_hi);)
2509 break;
2510 case lir_logic_or:
2511 __ orptr(l_lo, r_lo);
2512 NOT_LP64(__ orptr(l_hi, r_hi);)
2513 break;
2514 case lir_logic_xor:
2515 __ xorptr(l_lo, r_lo);
2516 NOT_LP64(__ xorptr(l_hi, r_hi);)
2517 break;
2518 default: ShouldNotReachHere();
2519 }
2520 }
2521
2522 Register dst_lo = dst->as_register_lo();
2523 Register dst_hi = dst->as_register_hi();
2524
2525 #ifdef _LP64
2526 move_regs(l_lo, dst_lo);
2527 #else
2528 if (dst_lo == l_hi) {
2529 assert(dst_hi != l_lo, "overwriting registers");
2530 move_regs(l_hi, dst_hi);
2531 move_regs(l_lo, dst_lo);
2532 } else {
2533 assert(dst_lo != l_hi, "overwriting registers");
2534 move_regs(l_lo, dst_lo);
2535 move_regs(l_hi, dst_hi);
2536 }
2537 #endif // _LP64
2538 }
2539 }
2540
2541
2542 // we assume that rax, and rdx can be overwritten
2543 void LIR_Assembler::arithmetic_idiv(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr temp, LIR_Opr result, CodeEmitInfo* info) {
2544
2545 assert(left->is_single_cpu(), "left must be register");
2546 assert(right->is_single_cpu() || right->is_constant(), "right must be register or constant");
2547 assert(result->is_single_cpu(), "result must be register");
2548
2549 // assert(left->destroys_register(), "check");
2550 // assert(right->destroys_register(), "check");
2551
2552 Register lreg = left->as_register();
2553 Register dreg = result->as_register();
2554
2555 if (right->is_constant()) {
2556 int divisor = right->as_constant_ptr()->as_jint();
2557 assert(divisor > 0 && is_power_of_2(divisor), "must be");
2558 if (code == lir_idiv) {
2559 assert(lreg == rax, "must be rax,");
2560 assert(temp->as_register() == rdx, "tmp register must be rdx");
2561 __ cdql(); // sign extend into rdx:rax
2562 if (divisor == 2) {
2563 __ subl(lreg, rdx);
2564 } else {
2565 __ andl(rdx, divisor - 1);
2566 __ addl(lreg, rdx);
2567 }
2568 __ sarl(lreg, log2_intptr(divisor));
2569 move_regs(lreg, dreg);
2570 } else if (code == lir_irem) {
2571 Label done;
2572 __ mov(dreg, lreg);
2573 __ andl(dreg, 0x80000000 | (divisor - 1));
2574 __ jcc(Assembler::positive, done);
2575 __ decrement(dreg);
2576 __ orl(dreg, ~(divisor - 1));
2577 __ increment(dreg);
2578 __ bind(done);
2579 } else {
2580 ShouldNotReachHere();
2581 }
2582 } else {
2583 Register rreg = right->as_register();
2584 assert(lreg == rax, "left register must be rax,");
2585 assert(rreg != rdx, "right register must not be rdx");
2586 assert(temp->as_register() == rdx, "tmp register must be rdx");
2587
2588 move_regs(lreg, rax);
2589
2590 int idivl_offset = __ corrected_idivl(rreg);
2591 add_debug_info_for_div0(idivl_offset, info);
2592 if (code == lir_irem) {
2593 move_regs(rdx, dreg); // result is in rdx
2594 } else {
2595 move_regs(rax, dreg);
2596 }
2597 }
2598 }
2599
2600
2601 void LIR_Assembler::comp_op(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Op2* op) {
2602 if (opr1->is_single_cpu()) {
2603 Register reg1 = opr1->as_register();
2604 if (opr2->is_single_cpu()) {
2605 // cpu register - cpu register
2606 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) {
2607 __ cmpoop(reg1, opr2->as_register());
2608 } else {
2609 assert(opr2->type() != T_OBJECT && opr2->type() != T_ARRAY, "cmp int, oop?");
2610 __ cmpl(reg1, opr2->as_register());
2611 }
2612 } else if (opr2->is_stack()) {
2613 // cpu register - stack
2614 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) {
2615 __ cmpoop(reg1, frame_map()->address_for_slot(opr2->single_stack_ix()));
2616 } else {
2617 __ cmpl(reg1, frame_map()->address_for_slot(opr2->single_stack_ix()));
2618 }
2619 } else if (opr2->is_constant()) {
2620 // cpu register - constant
2621 LIR_Const* c = opr2->as_constant_ptr();
2622 if (c->type() == T_INT) {
2623 __ cmpl(reg1, c->as_jint());
2624 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) {
2625 // In 64bit oops are single register
2626 jobject o = c->as_jobject();
2627 if (o == NULL) {
2628 __ cmpptr(reg1, (int32_t)NULL_WORD);
2629 } else {
2630 __ cmpoop(reg1, o);
2631 }
2632 } else {
2633 fatal("unexpected type: %s", basictype_to_str(c->type()));
2634 }
2635 // cpu register - address
2636 } else if (opr2->is_address()) {
2637 if (op->info() != NULL) {
2638 add_debug_info_for_null_check_here(op->info());
2639 }
2640 __ cmpl(reg1, as_Address(opr2->as_address_ptr()));
2641 } else {
2642 ShouldNotReachHere();
2643 }
2644
2645 } else if(opr1->is_double_cpu()) {
2646 Register xlo = opr1->as_register_lo();
2647 Register xhi = opr1->as_register_hi();
2648 if (opr2->is_double_cpu()) {
2649 #ifdef _LP64
2650 __ cmpptr(xlo, opr2->as_register_lo());
2651 #else
2652 // cpu register - cpu register
2653 Register ylo = opr2->as_register_lo();
2654 Register yhi = opr2->as_register_hi();
2655 __ subl(xlo, ylo);
2656 __ sbbl(xhi, yhi);
2657 if (condition == lir_cond_equal || condition == lir_cond_notEqual) {
2658 __ orl(xhi, xlo);
2659 }
2660 #endif // _LP64
2661 } else if (opr2->is_constant()) {
2662 // cpu register - constant 0
2663 assert(opr2->as_jlong() == (jlong)0, "only handles zero");
2664 #ifdef _LP64
2665 __ cmpptr(xlo, (int32_t)opr2->as_jlong());
2666 #else
2667 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "only handles equals case");
2668 __ orl(xhi, xlo);
2669 #endif // _LP64
2670 } else {
2671 ShouldNotReachHere();
2672 }
2673
2674 } else if (opr1->is_single_xmm()) {
2675 XMMRegister reg1 = opr1->as_xmm_float_reg();
2676 if (opr2->is_single_xmm()) {
2677 // xmm register - xmm register
2678 __ ucomiss(reg1, opr2->as_xmm_float_reg());
2679 } else if (opr2->is_stack()) {
2680 // xmm register - stack
2681 __ ucomiss(reg1, frame_map()->address_for_slot(opr2->single_stack_ix()));
2682 } else if (opr2->is_constant()) {
2683 // xmm register - constant
2684 __ ucomiss(reg1, InternalAddress(float_constant(opr2->as_jfloat())));
2685 } else if (opr2->is_address()) {
2686 // xmm register - address
2687 if (op->info() != NULL) {
2688 add_debug_info_for_null_check_here(op->info());
2689 }
2690 __ ucomiss(reg1, as_Address(opr2->as_address_ptr()));
2691 } else {
2692 ShouldNotReachHere();
2693 }
2694
2695 } else if (opr1->is_double_xmm()) {
2696 XMMRegister reg1 = opr1->as_xmm_double_reg();
2697 if (opr2->is_double_xmm()) {
2698 // xmm register - xmm register
2699 __ ucomisd(reg1, opr2->as_xmm_double_reg());
2700 } else if (opr2->is_stack()) {
2701 // xmm register - stack
2702 __ ucomisd(reg1, frame_map()->address_for_slot(opr2->double_stack_ix()));
2703 } else if (opr2->is_constant()) {
2704 // xmm register - constant
2705 __ ucomisd(reg1, InternalAddress(double_constant(opr2->as_jdouble())));
2706 } else if (opr2->is_address()) {
2707 // xmm register - address
2708 if (op->info() != NULL) {
2709 add_debug_info_for_null_check_here(op->info());
2710 }
2711 __ ucomisd(reg1, as_Address(opr2->pointer()->as_address()));
2712 } else {
2713 ShouldNotReachHere();
2714 }
2715
2716 } else if(opr1->is_single_fpu() || opr1->is_double_fpu()) {
2717 assert(opr1->is_fpu_register() && opr1->fpu() == 0, "currently left-hand side must be on TOS (relax this restriction)");
2718 assert(opr2->is_fpu_register(), "both must be registers");
2719 __ fcmp(noreg, opr2->fpu(), op->fpu_pop_count() > 0, op->fpu_pop_count() > 1);
2720
2721 } else if (opr1->is_address() && opr2->is_constant()) {
2722 LIR_Const* c = opr2->as_constant_ptr();
2723 #ifdef _LP64
2724 if (c->type() == T_OBJECT || c->type() == T_ARRAY) {
2725 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "need to reverse");
2726 __ movoop(rscratch1, c->as_jobject());
2727 }
2728 #endif // LP64
2729 if (op->info() != NULL) {
2730 add_debug_info_for_null_check_here(op->info());
2731 }
2732 // special case: address - constant
2733 LIR_Address* addr = opr1->as_address_ptr();
2734 if (c->type() == T_INT) {
2735 __ cmpl(as_Address(addr), c->as_jint());
2736 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) {
2737 #ifdef _LP64
2738 // %%% Make this explode if addr isn't reachable until we figure out a
2739 // better strategy by giving noreg as the temp for as_Address
2740 __ cmpoop(rscratch1, as_Address(addr, noreg));
2741 #else
2742 __ cmpoop(as_Address(addr), c->as_jobject());
2743 #endif // _LP64
2744 } else {
2745 ShouldNotReachHere();
2746 }
2747
2748 } else {
2749 ShouldNotReachHere();
2750 }
2751 }
2752
2753 void LIR_Assembler::comp_fl2i(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst, LIR_Op2* op) {
2754 if (code == lir_cmp_fd2i || code == lir_ucmp_fd2i) {
2755 if (left->is_single_xmm()) {
2756 assert(right->is_single_xmm(), "must match");
2757 __ cmpss2int(left->as_xmm_float_reg(), right->as_xmm_float_reg(), dst->as_register(), code == lir_ucmp_fd2i);
2758 } else if (left->is_double_xmm()) {
2759 assert(right->is_double_xmm(), "must match");
2760 __ cmpsd2int(left->as_xmm_double_reg(), right->as_xmm_double_reg(), dst->as_register(), code == lir_ucmp_fd2i);
2761
2762 } else {
2763 assert(left->is_single_fpu() || left->is_double_fpu(), "must be");
2764 assert(right->is_single_fpu() || right->is_double_fpu(), "must match");
2765
2766 assert(left->fpu() == 0, "left must be on TOS");
2767 __ fcmp2int(dst->as_register(), code == lir_ucmp_fd2i, right->fpu(),
2768 op->fpu_pop_count() > 0, op->fpu_pop_count() > 1);
2769 }
2770 } else {
2771 assert(code == lir_cmp_l2i, "check");
2772 #ifdef _LP64
2773 Label done;
2774 Register dest = dst->as_register();
2775 __ cmpptr(left->as_register_lo(), right->as_register_lo());
2776 __ movl(dest, -1);
2777 __ jccb(Assembler::less, done);
2778 __ set_byte_if_not_zero(dest);
2779 __ movzbl(dest, dest);
2780 __ bind(done);
2781 #else
2782 __ lcmp2int(left->as_register_hi(),
2783 left->as_register_lo(),
2784 right->as_register_hi(),
2785 right->as_register_lo());
2786 move_regs(left->as_register_hi(), dst->as_register());
2787 #endif // _LP64
2788 }
2789 }
2790
2791
2792 void LIR_Assembler::align_call(LIR_Code code) {
2793 if (os::is_MP()) {
2794 // make sure that the displacement word of the call ends up word aligned
2795 int offset = __ offset();
2796 switch (code) {
2797 case lir_static_call:
2798 case lir_optvirtual_call:
2799 case lir_dynamic_call:
2800 offset += NativeCall::displacement_offset;
2801 break;
2802 case lir_icvirtual_call:
2803 offset += NativeCall::displacement_offset + NativeMovConstReg::instruction_size;
2804 break;
2805 case lir_virtual_call: // currently, sparc-specific for niagara
2806 default: ShouldNotReachHere();
2807 }
2808 __ align(BytesPerWord, offset);
2809 }
2810 }
2811
2812
2813 void LIR_Assembler::call(LIR_OpJavaCall* op, relocInfo::relocType rtype) {
2814 assert(!os::is_MP() || (__ offset() + NativeCall::displacement_offset) % BytesPerWord == 0,
2815 "must be aligned");
2816 __ call(AddressLiteral(op->addr(), rtype));
2817 add_call_info(code_offset(), op->info());
2818 }
2819
2820
2821 void LIR_Assembler::ic_call(LIR_OpJavaCall* op) {
2822 __ ic_call(op->addr());
2823 add_call_info(code_offset(), op->info());
2824 assert(!os::is_MP() ||
2825 (__ offset() - NativeCall::instruction_size + NativeCall::displacement_offset) % BytesPerWord == 0,
2826 "must be aligned");
2827 }
2828
2829
2830 /* Currently, vtable-dispatch is only enabled for sparc platforms */
2831 void LIR_Assembler::vtable_call(LIR_OpJavaCall* op) {
2832 ShouldNotReachHere();
2833 }
2834
2835
2836 void LIR_Assembler::emit_static_call_stub() {
2837 address call_pc = __ pc();
2838 address stub = __ start_a_stub(call_stub_size());
2839 if (stub == NULL) {
2840 bailout("static call stub overflow");
2841 return;
2842 }
2843
2844 int start = __ offset();
2845 if (os::is_MP()) {
2846 // make sure that the displacement word of the call ends up word aligned
2847 __ align(BytesPerWord, __ offset() + NativeMovConstReg::instruction_size + NativeCall::displacement_offset);
2848 }
2849 __ relocate(static_stub_Relocation::spec(call_pc, false /* is_aot */));
2850 __ mov_metadata(rbx, (Metadata*)NULL);
2851 // must be set to -1 at code generation time
2852 assert(!os::is_MP() || ((__ offset() + 1) % BytesPerWord) == 0, "must be aligned on MP");
2853 // On 64bit this will die since it will take a movq & jmp, must be only a jmp
2854 __ jump(RuntimeAddress(__ pc()));
2855
2856 if (UseAOT) {
2857 // Trampoline to aot code
2858 __ relocate(static_stub_Relocation::spec(call_pc, true /* is_aot */));
2859 #ifdef _LP64
2860 __ mov64(rax, CONST64(0)); // address is zapped till fixup time.
2861 #else
2862 __ movl(rax, 0xdeadffff); // address is zapped till fixup time.
2863 #endif
2864 __ jmp(rax);
2865 }
2866 assert(__ offset() - start <= call_stub_size(), "stub too big");
2867 __ end_a_stub();
2868 }
2869
2870
2871 void LIR_Assembler::throw_op(LIR_Opr exceptionPC, LIR_Opr exceptionOop, CodeEmitInfo* info) {
2872 assert(exceptionOop->as_register() == rax, "must match");
2873 assert(exceptionPC->as_register() == rdx, "must match");
2874
2875 // exception object is not added to oop map by LinearScan
2876 // (LinearScan assumes that no oops are in fixed registers)
2877 info->add_register_oop(exceptionOop);
2878 Runtime1::StubID unwind_id;
2879
2880 // get current pc information
2881 // pc is only needed if the method has an exception handler, the unwind code does not need it.
2882 int pc_for_athrow_offset = __ offset();
2883 InternalAddress pc_for_athrow(__ pc());
2884 __ lea(exceptionPC->as_register(), pc_for_athrow);
2885 add_call_info(pc_for_athrow_offset, info); // for exception handler
2886
2887 __ verify_not_null_oop(rax);
2888 // search an exception handler (rax: exception oop, rdx: throwing pc)
2889 if (compilation()->has_fpu_code()) {
2890 unwind_id = Runtime1::handle_exception_id;
2891 } else {
2892 unwind_id = Runtime1::handle_exception_nofpu_id;
2893 }
2894 __ call(RuntimeAddress(Runtime1::entry_for(unwind_id)));
2895
2896 // enough room for two byte trap
2897 __ nop();
2898 }
2899
2900
2901 void LIR_Assembler::unwind_op(LIR_Opr exceptionOop) {
2902 assert(exceptionOop->as_register() == rax, "must match");
2903
2904 __ jmp(_unwind_handler_entry);
2905 }
2906
2907
2908 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, LIR_Opr count, LIR_Opr dest, LIR_Opr tmp) {
2909
2910 // optimized version for linear scan:
2911 // * count must be already in ECX (guaranteed by LinearScan)
2912 // * left and dest must be equal
2913 // * tmp must be unused
2914 assert(count->as_register() == SHIFT_count, "count must be in ECX");
2915 assert(left == dest, "left and dest must be equal");
2916 assert(tmp->is_illegal(), "wasting a register if tmp is allocated");
2917
2918 if (left->is_single_cpu()) {
2919 Register value = left->as_register();
2920 assert(value != SHIFT_count, "left cannot be ECX");
2921
2922 switch (code) {
2923 case lir_shl: __ shll(value); break;
2924 case lir_shr: __ sarl(value); break;
2925 case lir_ushr: __ shrl(value); break;
2926 default: ShouldNotReachHere();
2927 }
2928 } else if (left->is_double_cpu()) {
2929 Register lo = left->as_register_lo();
2930 Register hi = left->as_register_hi();
2931 assert(lo != SHIFT_count && hi != SHIFT_count, "left cannot be ECX");
2932 #ifdef _LP64
2933 switch (code) {
2934 case lir_shl: __ shlptr(lo); break;
2935 case lir_shr: __ sarptr(lo); break;
2936 case lir_ushr: __ shrptr(lo); break;
2937 default: ShouldNotReachHere();
2938 }
2939 #else
2940
2941 switch (code) {
2942 case lir_shl: __ lshl(hi, lo); break;
2943 case lir_shr: __ lshr(hi, lo, true); break;
2944 case lir_ushr: __ lshr(hi, lo, false); break;
2945 default: ShouldNotReachHere();
2946 }
2947 #endif // LP64
2948 } else {
2949 ShouldNotReachHere();
2950 }
2951 }
2952
2953
2954 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, jint count, LIR_Opr dest) {
2955 if (dest->is_single_cpu()) {
2956 // first move left into dest so that left is not destroyed by the shift
2957 Register value = dest->as_register();
2958 count = count & 0x1F; // Java spec
2959
2960 move_regs(left->as_register(), value);
2961 switch (code) {
2962 case lir_shl: __ shll(value, count); break;
2963 case lir_shr: __ sarl(value, count); break;
2964 case lir_ushr: __ shrl(value, count); break;
2965 default: ShouldNotReachHere();
2966 }
2967 } else if (dest->is_double_cpu()) {
2968 #ifndef _LP64
2969 Unimplemented();
2970 #else
2971 // first move left into dest so that left is not destroyed by the shift
2972 Register value = dest->as_register_lo();
2973 count = count & 0x1F; // Java spec
2974
2975 move_regs(left->as_register_lo(), value);
2976 switch (code) {
2977 case lir_shl: __ shlptr(value, count); break;
2978 case lir_shr: __ sarptr(value, count); break;
2979 case lir_ushr: __ shrptr(value, count); break;
2980 default: ShouldNotReachHere();
2981 }
2982 #endif // _LP64
2983 } else {
2984 ShouldNotReachHere();
2985 }
2986 }
2987
2988
2989 void LIR_Assembler::store_parameter(Register r, int offset_from_rsp_in_words) {
2990 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
2991 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
2992 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
2993 __ movptr (Address(rsp, offset_from_rsp_in_bytes), r);
2994 }
2995
2996
2997 void LIR_Assembler::store_parameter(jint c, int offset_from_rsp_in_words) {
2998 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
2999 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
3000 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
3001 __ movptr (Address(rsp, offset_from_rsp_in_bytes), c);
3002 }
3003
3004
3005 void LIR_Assembler::store_parameter(jobject o, int offset_from_rsp_in_words) {
3006 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
3007 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
3008 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
3009 __ movoop (Address(rsp, offset_from_rsp_in_bytes), o);
3010 }
3011
3012
3013 void LIR_Assembler::store_parameter(Metadata* m, int offset_from_rsp_in_words) {
3014 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
3015 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
3016 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
3017 __ mov_metadata(Address(rsp, offset_from_rsp_in_bytes), m);
3018 }
3019
3020
3021 // This code replaces a call to arraycopy; no exception may
3022 // be thrown in this code, they must be thrown in the System.arraycopy
3023 // activation frame; we could save some checks if this would not be the case
3024 void LIR_Assembler::emit_arraycopy(LIR_OpArrayCopy* op) {
3025 ciArrayKlass* default_type = op->expected_type();
3026 Register src = op->src()->as_register();
3027 Register dst = op->dst()->as_register();
3028 Register src_pos = op->src_pos()->as_register();
3029 Register dst_pos = op->dst_pos()->as_register();
3030 Register length = op->length()->as_register();
3031 Register tmp = op->tmp()->as_register();
3032
3033 CodeStub* stub = op->stub();
3034 int flags = op->flags();
3035 BasicType basic_type = default_type != NULL ? default_type->element_type()->basic_type() : T_ILLEGAL;
3036 if (basic_type == T_ARRAY) basic_type = T_OBJECT;
3037
3038 // if we don't know anything, just go through the generic arraycopy
3039 if (default_type == NULL) {
3040 Label done;
3041 // save outgoing arguments on stack in case call to System.arraycopy is needed
3042 // HACK ALERT. This code used to push the parameters in a hardwired fashion
3043 // for interpreter calling conventions. Now we have to do it in new style conventions.
3044 // For the moment until C1 gets the new register allocator I just force all the
3045 // args to the right place (except the register args) and then on the back side
3046 // reload the register args properly if we go slow path. Yuck
3047
3048 // These are proper for the calling convention
3049 store_parameter(length, 2);
3050 store_parameter(dst_pos, 1);
3051 store_parameter(dst, 0);
3052
3053 // these are just temporary placements until we need to reload
3054 store_parameter(src_pos, 3);
3055 store_parameter(src, 4);
3056 NOT_LP64(assert(src == rcx && src_pos == rdx, "mismatch in calling convention");)
3057
3058 address C_entry = CAST_FROM_FN_PTR(address, Runtime1::arraycopy);
3059
3060 address copyfunc_addr = StubRoutines::generic_arraycopy();
3061
3062 // pass arguments: may push as this is not a safepoint; SP must be fix at each safepoint
3063 #ifdef _LP64
3064 // The arguments are in java calling convention so we can trivially shift them to C
3065 // convention
3066 assert_different_registers(c_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4);
3067 __ mov(c_rarg0, j_rarg0);
3068 assert_different_registers(c_rarg1, j_rarg2, j_rarg3, j_rarg4);
3069 __ mov(c_rarg1, j_rarg1);
3070 assert_different_registers(c_rarg2, j_rarg3, j_rarg4);
3071 __ mov(c_rarg2, j_rarg2);
3072 assert_different_registers(c_rarg3, j_rarg4);
3073 __ mov(c_rarg3, j_rarg3);
3074 #ifdef _WIN64
3075 // Allocate abi space for args but be sure to keep stack aligned
3076 __ subptr(rsp, 6*wordSize);
3077 store_parameter(j_rarg4, 4);
3078 if (copyfunc_addr == NULL) { // Use C version if stub was not generated
3079 __ call(RuntimeAddress(C_entry));
3080 } else {
3081 #ifndef PRODUCT
3082 if (PrintC1Statistics) {
3083 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt));
3084 }
3085 #endif
3086 __ call(RuntimeAddress(copyfunc_addr));
3087 }
3088 __ addptr(rsp, 6*wordSize);
3089 #else
3090 __ mov(c_rarg4, j_rarg4);
3091 if (copyfunc_addr == NULL) { // Use C version if stub was not generated
3092 __ call(RuntimeAddress(C_entry));
3093 } else {
3094 #ifndef PRODUCT
3095 if (PrintC1Statistics) {
3096 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt));
3097 }
3098 #endif
3099 __ call(RuntimeAddress(copyfunc_addr));
3100 }
3101 #endif // _WIN64
3102 #else
3103 __ push(length);
3104 __ push(dst_pos);
3105 __ push(dst);
3106 __ push(src_pos);
3107 __ push(src);
3108
3109 if (copyfunc_addr == NULL) { // Use C version if stub was not generated
3110 __ call_VM_leaf(C_entry, 5); // removes pushed parameter from the stack
3111 } else {
3112 #ifndef PRODUCT
3113 if (PrintC1Statistics) {
3114 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt));
3115 }
3116 #endif
3117 __ call_VM_leaf(copyfunc_addr, 5); // removes pushed parameter from the stack
3118 }
3119
3120 #endif // _LP64
3121
3122 __ cmpl(rax, 0);
3123 __ jcc(Assembler::equal, *stub->continuation());
3124
3125 if (copyfunc_addr != NULL) {
3126 __ mov(tmp, rax);
3127 __ xorl(tmp, -1);
3128 }
3129
3130 // Reload values from the stack so they are where the stub
3131 // expects them.
3132 __ movptr (dst, Address(rsp, 0*BytesPerWord));
3133 __ movptr (dst_pos, Address(rsp, 1*BytesPerWord));
3134 __ movptr (length, Address(rsp, 2*BytesPerWord));
3135 __ movptr (src_pos, Address(rsp, 3*BytesPerWord));
3136 __ movptr (src, Address(rsp, 4*BytesPerWord));
3137
3138 if (copyfunc_addr != NULL) {
3139 __ subl(length, tmp);
3140 __ addl(src_pos, tmp);
3141 __ addl(dst_pos, tmp);
3142 }
3143 __ jmp(*stub->entry());
3144
3145 __ bind(*stub->continuation());
3146 return;
3147 }
3148
3149 assert(default_type != NULL && default_type->is_array_klass() && default_type->is_loaded(), "must be true at this point");
3150
3151 int elem_size = type2aelembytes(basic_type);
3152 Address::ScaleFactor scale;
3153
3154 switch (elem_size) {
3155 case 1 :
3156 scale = Address::times_1;
3157 break;
3158 case 2 :
3159 scale = Address::times_2;
3160 break;
3161 case 4 :
3162 scale = Address::times_4;
3163 break;
3164 case 8 :
3165 scale = Address::times_8;
3166 break;
3167 default:
3168 scale = Address::no_scale;
3169 ShouldNotReachHere();
3170 }
3171
3172 Address src_length_addr = Address(src, arrayOopDesc::length_offset_in_bytes());
3173 Address dst_length_addr = Address(dst, arrayOopDesc::length_offset_in_bytes());
3174 Address src_klass_addr = Address(src, oopDesc::klass_offset_in_bytes());
3175 Address dst_klass_addr = Address(dst, oopDesc::klass_offset_in_bytes());
3176
3177 // length and pos's are all sign extended at this point on 64bit
3178
3179 // test for NULL
3180 if (flags & LIR_OpArrayCopy::src_null_check) {
3181 __ testptr(src, src);
3182 __ jcc(Assembler::zero, *stub->entry());
3183 }
3184 if (flags & LIR_OpArrayCopy::dst_null_check) {
3185 __ testptr(dst, dst);
3186 __ jcc(Assembler::zero, *stub->entry());
3187 }
3188
3189 // If the compiler was not able to prove that exact type of the source or the destination
3190 // of the arraycopy is an array type, check at runtime if the source or the destination is
3191 // an instance type.
3192 if (flags & LIR_OpArrayCopy::type_check) {
3193 if (!(flags & LIR_OpArrayCopy::dst_objarray)) {
3194 __ load_klass(tmp, dst);
3195 __ cmpl(Address(tmp, in_bytes(Klass::layout_helper_offset())), Klass::_lh_neutral_value);
3196 __ jcc(Assembler::greaterEqual, *stub->entry());
3197 }
3198
3199 if (!(flags & LIR_OpArrayCopy::src_objarray)) {
3200 __ load_klass(tmp, src);
3201 __ cmpl(Address(tmp, in_bytes(Klass::layout_helper_offset())), Klass::_lh_neutral_value);
3202 __ jcc(Assembler::greaterEqual, *stub->entry());
3203 }
3204 }
3205
3206 // check if negative
3207 if (flags & LIR_OpArrayCopy::src_pos_positive_check) {
3208 __ testl(src_pos, src_pos);
3209 __ jcc(Assembler::less, *stub->entry());
3210 }
3211 if (flags & LIR_OpArrayCopy::dst_pos_positive_check) {
3212 __ testl(dst_pos, dst_pos);
3213 __ jcc(Assembler::less, *stub->entry());
3214 }
3215
3216 if (flags & LIR_OpArrayCopy::src_range_check) {
3217 __ lea(tmp, Address(src_pos, length, Address::times_1, 0));
3218 __ cmpl(tmp, src_length_addr);
3219 __ jcc(Assembler::above, *stub->entry());
3220 }
3221 if (flags & LIR_OpArrayCopy::dst_range_check) {
3222 __ lea(tmp, Address(dst_pos, length, Address::times_1, 0));
3223 __ cmpl(tmp, dst_length_addr);
3224 __ jcc(Assembler::above, *stub->entry());
3225 }
3226
3227 if (flags & LIR_OpArrayCopy::length_positive_check) {
3228 __ testl(length, length);
3229 __ jcc(Assembler::less, *stub->entry());
3230 }
3231
3232 #ifdef _LP64
3233 __ movl2ptr(src_pos, src_pos); //higher 32bits must be null
3234 __ movl2ptr(dst_pos, dst_pos); //higher 32bits must be null
3235 #endif
3236
3237 if (flags & LIR_OpArrayCopy::type_check) {
3238 // We don't know the array types are compatible
3239 if (basic_type != T_OBJECT) {
3240 // Simple test for basic type arrays
3241 if (UseCompressedClassPointers) {
3242 __ movl(tmp, src_klass_addr);
3243 __ cmpl(tmp, dst_klass_addr);
3244 } else {
3245 __ movptr(tmp, src_klass_addr);
3246 __ cmpptr(tmp, dst_klass_addr);
3247 }
3248 __ jcc(Assembler::notEqual, *stub->entry());
3249 } else {
3250 // For object arrays, if src is a sub class of dst then we can
3251 // safely do the copy.
3252 Label cont, slow;
3253
3254 __ push(src);
3255 __ push(dst);
3256
3257 __ load_klass(src, src);
3258 __ load_klass(dst, dst);
3259
3260 __ check_klass_subtype_fast_path(src, dst, tmp, &cont, &slow, NULL);
3261
3262 __ push(src);
3263 __ push(dst);
3264 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
3265 __ pop(dst);
3266 __ pop(src);
3267
3268 __ cmpl(src, 0);
3269 __ jcc(Assembler::notEqual, cont);
3270
3271 __ bind(slow);
3272 __ pop(dst);
3273 __ pop(src);
3274
3275 address copyfunc_addr = StubRoutines::checkcast_arraycopy();
3276 if (copyfunc_addr != NULL) { // use stub if available
3277 // src is not a sub class of dst so we have to do a
3278 // per-element check.
3279
3280 int mask = LIR_OpArrayCopy::src_objarray|LIR_OpArrayCopy::dst_objarray;
3281 if ((flags & mask) != mask) {
3282 // Check that at least both of them object arrays.
3283 assert(flags & mask, "one of the two should be known to be an object array");
3284
3285 if (!(flags & LIR_OpArrayCopy::src_objarray)) {
3286 __ load_klass(tmp, src);
3287 } else if (!(flags & LIR_OpArrayCopy::dst_objarray)) {
3288 __ load_klass(tmp, dst);
3289 }
3290 int lh_offset = in_bytes(Klass::layout_helper_offset());
3291 Address klass_lh_addr(tmp, lh_offset);
3292 jint objArray_lh = Klass::array_layout_helper(T_OBJECT);
3293 __ cmpl(klass_lh_addr, objArray_lh);
3294 __ jcc(Assembler::notEqual, *stub->entry());
3295 }
3296
3297 // Spill because stubs can use any register they like and it's
3298 // easier to restore just those that we care about.
3299 store_parameter(dst, 0);
3300 store_parameter(dst_pos, 1);
3301 store_parameter(length, 2);
3302 store_parameter(src_pos, 3);
3303 store_parameter(src, 4);
3304
3305 #ifndef _LP64
3306 __ movptr(tmp, dst_klass_addr);
3307 __ movptr(tmp, Address(tmp, ObjArrayKlass::element_klass_offset()));
3308 __ push(tmp);
3309 __ movl(tmp, Address(tmp, Klass::super_check_offset_offset()));
3310 __ push(tmp);
3311 __ push(length);
3312 __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3313 __ push(tmp);
3314 __ lea(tmp, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3315 __ push(tmp);
3316
3317 __ call_VM_leaf(copyfunc_addr, 5);
3318 #else
3319 __ movl2ptr(length, length); //higher 32bits must be null
3320
3321 __ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3322 assert_different_registers(c_rarg0, dst, dst_pos, length);
3323 __ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3324 assert_different_registers(c_rarg1, dst, length);
3325
3326 __ mov(c_rarg2, length);
3327 assert_different_registers(c_rarg2, dst);
3328
3329 #ifdef _WIN64
3330 // Allocate abi space for args but be sure to keep stack aligned
3331 __ subptr(rsp, 6*wordSize);
3332 __ load_klass(c_rarg3, dst);
3333 __ movptr(c_rarg3, Address(c_rarg3, ObjArrayKlass::element_klass_offset()));
3334 store_parameter(c_rarg3, 4);
3335 __ movl(c_rarg3, Address(c_rarg3, Klass::super_check_offset_offset()));
3336 __ call(RuntimeAddress(copyfunc_addr));
3337 __ addptr(rsp, 6*wordSize);
3338 #else
3339 __ load_klass(c_rarg4, dst);
3340 __ movptr(c_rarg4, Address(c_rarg4, ObjArrayKlass::element_klass_offset()));
3341 __ movl(c_rarg3, Address(c_rarg4, Klass::super_check_offset_offset()));
3342 __ call(RuntimeAddress(copyfunc_addr));
3343 #endif
3344
3345 #endif
3346
3347 #ifndef PRODUCT
3348 if (PrintC1Statistics) {
3349 Label failed;
3350 __ testl(rax, rax);
3351 __ jcc(Assembler::notZero, failed);
3352 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_cnt));
3353 __ bind(failed);
3354 }
3355 #endif
3356
3357 __ testl(rax, rax);
3358 __ jcc(Assembler::zero, *stub->continuation());
3359
3360 #ifndef PRODUCT
3361 if (PrintC1Statistics) {
3362 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_attempt_cnt));
3363 }
3364 #endif
3365
3366 __ mov(tmp, rax);
3367
3368 __ xorl(tmp, -1);
3369
3370 // Restore previously spilled arguments
3371 __ movptr (dst, Address(rsp, 0*BytesPerWord));
3372 __ movptr (dst_pos, Address(rsp, 1*BytesPerWord));
3373 __ movptr (length, Address(rsp, 2*BytesPerWord));
3374 __ movptr (src_pos, Address(rsp, 3*BytesPerWord));
3375 __ movptr (src, Address(rsp, 4*BytesPerWord));
3376
3377
3378 __ subl(length, tmp);
3379 __ addl(src_pos, tmp);
3380 __ addl(dst_pos, tmp);
3381 }
3382
3383 __ jmp(*stub->entry());
3384
3385 __ bind(cont);
3386 __ pop(dst);
3387 __ pop(src);
3388 }
3389 }
3390
3391 #ifdef ASSERT
3392 if (basic_type != T_OBJECT || !(flags & LIR_OpArrayCopy::type_check)) {
3393 // Sanity check the known type with the incoming class. For the
3394 // primitive case the types must match exactly with src.klass and
3395 // dst.klass each exactly matching the default type. For the
3396 // object array case, if no type check is needed then either the
3397 // dst type is exactly the expected type and the src type is a
3398 // subtype which we can't check or src is the same array as dst
3399 // but not necessarily exactly of type default_type.
3400 Label known_ok, halt;
3401 __ mov_metadata(tmp, default_type->constant_encoding());
3402 #ifdef _LP64
3403 if (UseCompressedClassPointers) {
3404 __ encode_klass_not_null(tmp);
3405 }
3406 #endif
3407
3408 if (basic_type != T_OBJECT) {
3409
3410 if (UseCompressedClassPointers) __ cmpl(tmp, dst_klass_addr);
3411 else __ cmpptr(tmp, dst_klass_addr);
3412 __ jcc(Assembler::notEqual, halt);
3413 if (UseCompressedClassPointers) __ cmpl(tmp, src_klass_addr);
3414 else __ cmpptr(tmp, src_klass_addr);
3415 __ jcc(Assembler::equal, known_ok);
3416 } else {
3417 if (UseCompressedClassPointers) __ cmpl(tmp, dst_klass_addr);
3418 else __ cmpptr(tmp, dst_klass_addr);
3419 __ jcc(Assembler::equal, known_ok);
3420 __ cmpptr(src, dst);
3421 __ jcc(Assembler::equal, known_ok);
3422 }
3423 __ bind(halt);
3424 __ stop("incorrect type information in arraycopy");
3425 __ bind(known_ok);
3426 }
3427 #endif
3428
3429 #ifndef PRODUCT
3430 if (PrintC1Statistics) {
3431 __ incrementl(ExternalAddress(Runtime1::arraycopy_count_address(basic_type)));
3432 }
3433 #endif
3434
3435 #ifdef _LP64
3436 assert_different_registers(c_rarg0, dst, dst_pos, length);
3437 __ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3438 assert_different_registers(c_rarg1, length);
3439 __ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3440 __ mov(c_rarg2, length);
3441
3442 #else
3443 __ lea(tmp, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3444 store_parameter(tmp, 0);
3445 __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3446 store_parameter(tmp, 1);
3447 store_parameter(length, 2);
3448 #endif // _LP64
3449
3450 bool disjoint = (flags & LIR_OpArrayCopy::overlapping) == 0;
3451 bool aligned = (flags & LIR_OpArrayCopy::unaligned) == 0;
3452 const char *name;
3453 address entry = StubRoutines::select_arraycopy_function(basic_type, aligned, disjoint, name, false);
3454 __ call_VM_leaf(entry, 0);
3455
3456 __ bind(*stub->continuation());
3457 }
3458
3459 void LIR_Assembler::emit_updatecrc32(LIR_OpUpdateCRC32* op) {
3460 assert(op->crc()->is_single_cpu(), "crc must be register");
3461 assert(op->val()->is_single_cpu(), "byte value must be register");
3462 assert(op->result_opr()->is_single_cpu(), "result must be register");
3463 Register crc = op->crc()->as_register();
3464 Register val = op->val()->as_register();
3465 Register res = op->result_opr()->as_register();
3466
3467 assert_different_registers(val, crc, res);
3468
3469 __ lea(res, ExternalAddress(StubRoutines::crc_table_addr()));
3470 __ notl(crc); // ~crc
3471 __ update_byte_crc32(crc, val, res);
3472 __ notl(crc); // ~crc
3473 __ mov(res, crc);
3474 }
3475
3476 void LIR_Assembler::emit_lock(LIR_OpLock* op) {
3477 Register obj = op->obj_opr()->as_register(); // may not be an oop
3478 Register hdr = op->hdr_opr()->as_register();
3479 Register lock = op->lock_opr()->as_register();
3480 if (!UseFastLocking) {
3481 __ jmp(*op->stub()->entry());
3482 } else if (op->code() == lir_lock) {
3483 Register scratch = noreg;
3484 if (UseBiasedLocking) {
3485 scratch = op->scratch_opr()->as_register();
3486 }
3487 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
3488 // add debug info for NullPointerException only if one is possible
3489 int null_check_offset = __ lock_object(hdr, obj, lock, scratch, *op->stub()->entry());
3490 if (op->info() != NULL) {
3491 add_debug_info_for_null_check(null_check_offset, op->info());
3492 }
3493 // done
3494 } else if (op->code() == lir_unlock) {
3495 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
3496 __ unlock_object(hdr, obj, lock, *op->stub()->entry());
3497 } else {
3498 Unimplemented();
3499 }
3500 __ bind(*op->stub()->continuation());
3501 }
3502
3503
3504 void LIR_Assembler::emit_profile_call(LIR_OpProfileCall* op) {
3505 ciMethod* method = op->profiled_method();
3506 int bci = op->profiled_bci();
3507 ciMethod* callee = op->profiled_callee();
3508
3509 // Update counter for all call types
3510 ciMethodData* md = method->method_data_or_null();
3511 assert(md != NULL, "Sanity");
3512 ciProfileData* data = md->bci_to_data(bci);
3513 assert(data->is_CounterData(), "need CounterData for calls");
3514 assert(op->mdo()->is_single_cpu(), "mdo must be allocated");
3515 Register mdo = op->mdo()->as_register();
3516 __ mov_metadata(mdo, md->constant_encoding());
3517 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
3518 // Perform additional virtual call profiling for invokevirtual and
3519 // invokeinterface bytecodes
3520 if (op->should_profile_receiver_type()) {
3521 assert(op->recv()->is_single_cpu(), "recv must be allocated");
3522 Register recv = op->recv()->as_register();
3523 assert_different_registers(mdo, recv);
3524 assert(data->is_VirtualCallData(), "need VirtualCallData for virtual calls");
3525 ciKlass* known_klass = op->known_holder();
3526 if (C1OptimizeVirtualCallProfiling && known_klass != NULL) {
3527 // We know the type that will be seen at this call site; we can
3528 // statically update the MethodData* rather than needing to do
3529 // dynamic tests on the receiver type
3530
3531 // NOTE: we should probably put a lock around this search to
3532 // avoid collisions by concurrent compilations
3533 ciVirtualCallData* vc_data = (ciVirtualCallData*) data;
3534 uint i;
3535 for (i = 0; i < VirtualCallData::row_limit(); i++) {
3536 ciKlass* receiver = vc_data->receiver(i);
3537 if (known_klass->equals(receiver)) {
3538 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i)));
3539 __ addptr(data_addr, DataLayout::counter_increment);
3540 return;
3541 }
3542 }
3543
3544 // Receiver type not found in profile data; select an empty slot
3545
3546 // Note that this is less efficient than it should be because it
3547 // always does a write to the receiver part of the
3548 // VirtualCallData rather than just the first time
3549 for (i = 0; i < VirtualCallData::row_limit(); i++) {
3550 ciKlass* receiver = vc_data->receiver(i);
3551 if (receiver == NULL) {
3552 Address recv_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_offset(i)));
3553 __ mov_metadata(recv_addr, known_klass->constant_encoding());
3554 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i)));
3555 __ addptr(data_addr, DataLayout::counter_increment);
3556 return;
3557 }
3558 }
3559 } else {
3560 __ load_klass(recv, recv);
3561 Label update_done;
3562 type_profile_helper(mdo, md, data, recv, &update_done);
3563 // Receiver did not match any saved receiver and there is no empty row for it.
3564 // Increment total counter to indicate polymorphic case.
3565 __ addptr(counter_addr, DataLayout::counter_increment);
3566
3567 __ bind(update_done);
3568 }
3569 } else {
3570 // Static call
3571 __ addptr(counter_addr, DataLayout::counter_increment);
3572 }
3573 }
3574
3575 void LIR_Assembler::emit_profile_type(LIR_OpProfileType* op) {
3576 Register obj = op->obj()->as_register();
3577 Register tmp = op->tmp()->as_pointer_register();
3578 Address mdo_addr = as_Address(op->mdp()->as_address_ptr());
3579 ciKlass* exact_klass = op->exact_klass();
3580 intptr_t current_klass = op->current_klass();
3581 bool not_null = op->not_null();
3582 bool no_conflict = op->no_conflict();
3583
3584 Label update, next, none;
3585
3586 bool do_null = !not_null;
3587 bool exact_klass_set = exact_klass != NULL && ciTypeEntries::valid_ciklass(current_klass) == exact_klass;
3588 bool do_update = !TypeEntries::is_type_unknown(current_klass) && !exact_klass_set;
3589
3590 assert(do_null || do_update, "why are we here?");
3591 assert(!TypeEntries::was_null_seen(current_klass) || do_update, "why are we here?");
3592
3593 __ verify_oop(obj);
3594
3595 if (tmp != obj) {
3596 __ mov(tmp, obj);
3597 }
3598 if (do_null) {
3599 __ testptr(tmp, tmp);
3600 __ jccb(Assembler::notZero, update);
3601 if (!TypeEntries::was_null_seen(current_klass)) {
3602 __ orptr(mdo_addr, TypeEntries::null_seen);
3603 }
3604 if (do_update) {
3605 #ifndef ASSERT
3606 __ jmpb(next);
3607 }
3608 #else
3609 __ jmp(next);
3610 }
3611 } else {
3612 __ testptr(tmp, tmp);
3613 __ jccb(Assembler::notZero, update);
3614 __ stop("unexpect null obj");
3615 #endif
3616 }
3617
3618 __ bind(update);
3619
3620 if (do_update) {
3621 #ifdef ASSERT
3622 if (exact_klass != NULL) {
3623 Label ok;
3624 __ load_klass(tmp, tmp);
3625 __ push(tmp);
3626 __ mov_metadata(tmp, exact_klass->constant_encoding());
3627 __ cmpptr(tmp, Address(rsp, 0));
3628 __ jccb(Assembler::equal, ok);
3629 __ stop("exact klass and actual klass differ");
3630 __ bind(ok);
3631 __ pop(tmp);
3632 }
3633 #endif
3634 if (!no_conflict) {
3635 if (exact_klass == NULL || TypeEntries::is_type_none(current_klass)) {
3636 if (exact_klass != NULL) {
3637 __ mov_metadata(tmp, exact_klass->constant_encoding());
3638 } else {
3639 __ load_klass(tmp, tmp);
3640 }
3641
3642 __ xorptr(tmp, mdo_addr);
3643 __ testptr(tmp, TypeEntries::type_klass_mask);
3644 // klass seen before, nothing to do. The unknown bit may have been
3645 // set already but no need to check.
3646 __ jccb(Assembler::zero, next);
3647
3648 __ testptr(tmp, TypeEntries::type_unknown);
3649 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
3650
3651 if (TypeEntries::is_type_none(current_klass)) {
3652 __ cmpptr(mdo_addr, 0);
3653 __ jccb(Assembler::equal, none);
3654 __ cmpptr(mdo_addr, TypeEntries::null_seen);
3655 __ jccb(Assembler::equal, none);
3656 // There is a chance that the checks above (re-reading profiling
3657 // data from memory) fail if another thread has just set the
3658 // profiling to this obj's klass
3659 __ xorptr(tmp, mdo_addr);
3660 __ testptr(tmp, TypeEntries::type_klass_mask);
3661 __ jccb(Assembler::zero, next);
3662 }
3663 } else {
3664 assert(ciTypeEntries::valid_ciklass(current_klass) != NULL &&
3665 ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "conflict only");
3666
3667 __ movptr(tmp, mdo_addr);
3668 __ testptr(tmp, TypeEntries::type_unknown);
3669 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
3670 }
3671
3672 // different than before. Cannot keep accurate profile.
3673 __ orptr(mdo_addr, TypeEntries::type_unknown);
3674
3675 if (TypeEntries::is_type_none(current_klass)) {
3676 __ jmpb(next);
3677
3678 __ bind(none);
3679 // first time here. Set profile type.
3680 __ movptr(mdo_addr, tmp);
3681 }
3682 } else {
3683 // There's a single possible klass at this profile point
3684 assert(exact_klass != NULL, "should be");
3685 if (TypeEntries::is_type_none(current_klass)) {
3686 __ mov_metadata(tmp, exact_klass->constant_encoding());
3687 __ xorptr(tmp, mdo_addr);
3688 __ testptr(tmp, TypeEntries::type_klass_mask);
3689 #ifdef ASSERT
3690 __ jcc(Assembler::zero, next);
3691
3692 {
3693 Label ok;
3694 __ push(tmp);
3695 __ cmpptr(mdo_addr, 0);
3696 __ jcc(Assembler::equal, ok);
3697 __ cmpptr(mdo_addr, TypeEntries::null_seen);
3698 __ jcc(Assembler::equal, ok);
3699 // may have been set by another thread
3700 __ mov_metadata(tmp, exact_klass->constant_encoding());
3701 __ xorptr(tmp, mdo_addr);
3702 __ testptr(tmp, TypeEntries::type_mask);
3703 __ jcc(Assembler::zero, ok);
3704
3705 __ stop("unexpected profiling mismatch");
3706 __ bind(ok);
3707 __ pop(tmp);
3708 }
3709 #else
3710 __ jccb(Assembler::zero, next);
3711 #endif
3712 // first time here. Set profile type.
3713 __ movptr(mdo_addr, tmp);
3714 } else {
3715 assert(ciTypeEntries::valid_ciklass(current_klass) != NULL &&
3716 ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "inconsistent");
3717
3718 __ movptr(tmp, mdo_addr);
3719 __ testptr(tmp, TypeEntries::type_unknown);
3720 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
3721
3722 __ orptr(mdo_addr, TypeEntries::type_unknown);
3723 }
3724 }
3725
3726 __ bind(next);
3727 }
3728 }
3729
3730 void LIR_Assembler::emit_delay(LIR_OpDelay*) {
3731 Unimplemented();
3732 }
3733
3734
3735 void LIR_Assembler::monitor_address(int monitor_no, LIR_Opr dst) {
3736 __ lea(dst->as_register(), frame_map()->address_for_monitor_lock(monitor_no));
3737 }
3738
3739
3740 void LIR_Assembler::align_backward_branch_target() {
3741 __ align(BytesPerWord);
3742 }
3743
3744
3745 void LIR_Assembler::negate(LIR_Opr left, LIR_Opr dest) {
3746 if (left->is_single_cpu()) {
3747 __ negl(left->as_register());
3748 move_regs(left->as_register(), dest->as_register());
3749
3750 } else if (left->is_double_cpu()) {
3751 Register lo = left->as_register_lo();
3752 #ifdef _LP64
3753 Register dst = dest->as_register_lo();
3754 __ movptr(dst, lo);
3755 __ negptr(dst);
3756 #else
3757 Register hi = left->as_register_hi();
3758 __ lneg(hi, lo);
3759 if (dest->as_register_lo() == hi) {
3760 assert(dest->as_register_hi() != lo, "destroying register");
3761 move_regs(hi, dest->as_register_hi());
3762 move_regs(lo, dest->as_register_lo());
3763 } else {
3764 move_regs(lo, dest->as_register_lo());
3765 move_regs(hi, dest->as_register_hi());
3766 }
3767 #endif // _LP64
3768
3769 } else if (dest->is_single_xmm()) {
3770 if (left->as_xmm_float_reg() != dest->as_xmm_float_reg()) {
3771 __ movflt(dest->as_xmm_float_reg(), left->as_xmm_float_reg());
3772 }
3773 if (UseAVX > 0) {
3774 __ vnegatess(dest->as_xmm_float_reg(), dest->as_xmm_float_reg(),
3775 ExternalAddress((address)float_signflip_pool));
3776 } else {
3777 __ xorps(dest->as_xmm_float_reg(),
3778 ExternalAddress((address)float_signflip_pool));
3779 }
3780 } else if (dest->is_double_xmm()) {
3781 if (left->as_xmm_double_reg() != dest->as_xmm_double_reg()) {
3782 __ movdbl(dest->as_xmm_double_reg(), left->as_xmm_double_reg());
3783 }
3784 if (UseAVX > 0) {
3785 __ vnegatesd(dest->as_xmm_double_reg(), dest->as_xmm_double_reg(),
3786 ExternalAddress((address)double_signflip_pool));
3787 } else {
3788 __ xorpd(dest->as_xmm_double_reg(),
3789 ExternalAddress((address)double_signflip_pool));
3790 }
3791 } else if (left->is_single_fpu() || left->is_double_fpu()) {
3792 assert(left->fpu() == 0, "arg must be on TOS");
3793 assert(dest->fpu() == 0, "dest must be TOS");
3794 __ fchs();
3795
3796 } else {
3797 ShouldNotReachHere();
3798 }
3799 }
3800
3801
3802 void LIR_Assembler::leal(LIR_Opr addr, LIR_Opr dest) {
3803 assert(addr->is_address() && dest->is_register(), "check");
3804 Register reg;
3805 reg = dest->as_pointer_register();
3806 __ lea(reg, as_Address(addr->as_address_ptr()));
3807 }
3808
3809
3810
3811 void LIR_Assembler::rt_call(LIR_Opr result, address dest, const LIR_OprList* args, LIR_Opr tmp, CodeEmitInfo* info) {
3812 assert(!tmp->is_valid(), "don't need temporary");
3813 __ call(RuntimeAddress(dest));
3814 if (info != NULL) {
3815 add_call_info_here(info);
3816 }
3817 }
3818
3819
3820 void LIR_Assembler::volatile_move_op(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info) {
3821 assert(type == T_LONG, "only for volatile long fields");
3822
3823 if (info != NULL) {
3824 add_debug_info_for_null_check_here(info);
3825 }
3826
3827 if (src->is_double_xmm()) {
3828 if (dest->is_double_cpu()) {
3829 #ifdef _LP64
3830 __ movdq(dest->as_register_lo(), src->as_xmm_double_reg());
3831 #else
3832 __ movdl(dest->as_register_lo(), src->as_xmm_double_reg());
3833 __ psrlq(src->as_xmm_double_reg(), 32);
3834 __ movdl(dest->as_register_hi(), src->as_xmm_double_reg());
3835 #endif // _LP64
3836 } else if (dest->is_double_stack()) {
3837 __ movdbl(frame_map()->address_for_slot(dest->double_stack_ix()), src->as_xmm_double_reg());
3838 } else if (dest->is_address()) {
3839 __ movdbl(as_Address(dest->as_address_ptr()), src->as_xmm_double_reg());
3840 } else {
3841 ShouldNotReachHere();
3842 }
3843
3844 } else if (dest->is_double_xmm()) {
3845 if (src->is_double_stack()) {
3846 __ movdbl(dest->as_xmm_double_reg(), frame_map()->address_for_slot(src->double_stack_ix()));
3847 } else if (src->is_address()) {
3848 __ movdbl(dest->as_xmm_double_reg(), as_Address(src->as_address_ptr()));
3849 } else {
3850 ShouldNotReachHere();
3851 }
3852
3853 } else if (src->is_double_fpu()) {
3854 assert(src->fpu_regnrLo() == 0, "must be TOS");
3855 if (dest->is_double_stack()) {
3856 __ fistp_d(frame_map()->address_for_slot(dest->double_stack_ix()));
3857 } else if (dest->is_address()) {
3858 __ fistp_d(as_Address(dest->as_address_ptr()));
3859 } else {
3860 ShouldNotReachHere();
3861 }
3862
3863 } else if (dest->is_double_fpu()) {
3864 assert(dest->fpu_regnrLo() == 0, "must be TOS");
3865 if (src->is_double_stack()) {
3866 __ fild_d(frame_map()->address_for_slot(src->double_stack_ix()));
3867 } else if (src->is_address()) {
3868 __ fild_d(as_Address(src->as_address_ptr()));
3869 } else {
3870 ShouldNotReachHere();
3871 }
3872 } else {
3873 ShouldNotReachHere();
3874 }
3875 }
3876
3877 #ifdef ASSERT
3878 // emit run-time assertion
3879 void LIR_Assembler::emit_assert(LIR_OpAssert* op) {
3880 assert(op->code() == lir_assert, "must be");
3881
3882 if (op->in_opr1()->is_valid()) {
3883 assert(op->in_opr2()->is_valid(), "both operands must be valid");
3884 comp_op(op->condition(), op->in_opr1(), op->in_opr2(), op);
3885 } else {
3886 assert(op->in_opr2()->is_illegal(), "both operands must be illegal");
3887 assert(op->condition() == lir_cond_always, "no other conditions allowed");
3888 }
3889
3890 Label ok;
3891 if (op->condition() != lir_cond_always) {
3892 Assembler::Condition acond = Assembler::zero;
3893 switch (op->condition()) {
3894 case lir_cond_equal: acond = Assembler::equal; break;
3895 case lir_cond_notEqual: acond = Assembler::notEqual; break;
3896 case lir_cond_less: acond = Assembler::less; break;
3897 case lir_cond_lessEqual: acond = Assembler::lessEqual; break;
3898 case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break;
3899 case lir_cond_greater: acond = Assembler::greater; break;
3900 case lir_cond_belowEqual: acond = Assembler::belowEqual; break;
3901 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; break;
3902 default: ShouldNotReachHere();
3903 }
3904 __ jcc(acond, ok);
3905 }
3906 if (op->halt()) {
3907 const char* str = __ code_string(op->msg());
3908 __ stop(str);
3909 } else {
3910 breakpoint();
3911 }
3912 __ bind(ok);
3913 }
3914 #endif
3915
3916 void LIR_Assembler::membar() {
3917 // QQQ sparc TSO uses this,
3918 __ membar( Assembler::Membar_mask_bits(Assembler::StoreLoad));
3919 }
3920
3921 void LIR_Assembler::membar_acquire() {
3922 // No x86 machines currently require load fences
3923 }
3924
3925 void LIR_Assembler::membar_release() {
3926 // No x86 machines currently require store fences
3927 }
3928
3929 void LIR_Assembler::membar_loadload() {
3930 // no-op
3931 //__ membar(Assembler::Membar_mask_bits(Assembler::loadload));
3932 }
3933
3934 void LIR_Assembler::membar_storestore() {
3935 // no-op
3936 //__ membar(Assembler::Membar_mask_bits(Assembler::storestore));
3937 }
3938
3939 void LIR_Assembler::membar_loadstore() {
3940 // no-op
3941 //__ membar(Assembler::Membar_mask_bits(Assembler::loadstore));
3942 }
3943
3944 void LIR_Assembler::membar_storeload() {
3945 __ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad));
3946 }
3947
3948 void LIR_Assembler::on_spin_wait() {
3949 __ pause ();
3950 }
3951
3952 void LIR_Assembler::get_thread(LIR_Opr result_reg) {
3953 assert(result_reg->is_register(), "check");
3954 #ifdef _LP64
3955 // __ get_thread(result_reg->as_register_lo());
3956 __ mov(result_reg->as_register(), r15_thread);
3957 #else
3958 __ get_thread(result_reg->as_register());
3959 #endif // _LP64
3960 }
3961
3962
3963 void LIR_Assembler::peephole(LIR_List*) {
3964 // do nothing for now
3965 }
3966
3967 void LIR_Assembler::atomic_op(LIR_Code code, LIR_Opr src, LIR_Opr data, LIR_Opr dest, LIR_Opr tmp) {
3968 assert(data == dest, "xchg/xadd uses only 2 operands");
3969
3970 if (data->type() == T_INT) {
3971 if (code == lir_xadd) {
3972 if (os::is_MP()) {
3973 __ lock();
3974 }
3975 __ xaddl(as_Address(src->as_address_ptr()), data->as_register());
3976 } else {
3977 __ xchgl(data->as_register(), as_Address(src->as_address_ptr()));
3978 }
3979 } else if (data->is_oop()) {
3980 assert (code == lir_xchg, "xadd for oops");
3981 Register obj = data->as_register();
3982 #ifdef _LP64
3983 if (UseCompressedOops) {
3984 __ encode_heap_oop(obj);
3985 __ xchgl(obj, as_Address(src->as_address_ptr()));
3986 __ decode_heap_oop(obj);
3987 } else {
3988 __ xchgptr(obj, as_Address(src->as_address_ptr()));
3989 }
3990 #else
3991 __ xchgl(obj, as_Address(src->as_address_ptr()));
3992 #endif
3993 } else if (data->type() == T_LONG) {
3994 #ifdef _LP64
3995 assert(data->as_register_lo() == data->as_register_hi(), "should be a single register");
3996 if (code == lir_xadd) {
3997 if (os::is_MP()) {
3998 __ lock();
3999 }
4000 __ xaddq(as_Address(src->as_address_ptr()), data->as_register_lo());
4001 } else {
4002 __ xchgq(data->as_register_lo(), as_Address(src->as_address_ptr()));
4003 }
4004 #else
4005 ShouldNotReachHere();
4006 #endif
4007 } else {
4008 ShouldNotReachHere();
4009 }
4010 }
4011
4012 #undef __