1 /*
2 * Copyright (c) 2000, 2018, 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/cardTableBarrierSet.hpp"
37 #include "gc/shared/collectedHeap.hpp"
38 #include "nativeInst_x86.hpp"
39 #include "oops/objArrayKlass.hpp"
40 #include "runtime/frame.inline.hpp"
41 #include "runtime/safepointMechanism.hpp"
42 #include "runtime/sharedRuntime.hpp"
43 #include "vmreg_x86.inline.hpp"
44
45
46 // These masks are used to provide 128-bit aligned bitmasks to the XMM
47 // instructions, to allow sign-masking or sign-bit flipping. They allow
48 // fast versions of NegF/NegD and AbsF/AbsD.
49
50 // Note: 'double' and 'long long' have 32-bits alignment on x86.
51 static jlong* double_quadword(jlong *adr, jlong lo, jlong hi) {
52 // Use the expression (adr)&(~0xF) to provide 128-bits aligned address
53 // of 128-bits operands for SSE instructions.
54 jlong *operand = (jlong*)(((intptr_t)adr) & ((intptr_t)(~0xF)));
55 // Store the value to a 128-bits operand.
56 operand[0] = lo;
57 operand[1] = hi;
58 return operand;
59 }
60
61 // Buffer for 128-bits masks used by SSE instructions.
62 static jlong fp_signmask_pool[(4+1)*2]; // 4*128bits(data) + 128bits(alignment)
63
64 // Static initialization during VM startup.
65 static jlong *float_signmask_pool = double_quadword(&fp_signmask_pool[1*2], CONST64(0x7FFFFFFF7FFFFFFF), CONST64(0x7FFFFFFF7FFFFFFF));
66 static jlong *double_signmask_pool = double_quadword(&fp_signmask_pool[2*2], CONST64(0x7FFFFFFFFFFFFFFF), CONST64(0x7FFFFFFFFFFFFFFF));
67 static jlong *float_signflip_pool = double_quadword(&fp_signmask_pool[3*2], (jlong)UCONST64(0x8000000080000000), (jlong)UCONST64(0x8000000080000000));
68 static jlong *double_signflip_pool = double_quadword(&fp_signmask_pool[4*2], (jlong)UCONST64(0x8000000000000000), (jlong)UCONST64(0x8000000000000000));
69
70
71
72 NEEDS_CLEANUP // remove this definitions ?
73 const Register IC_Klass = rax; // where the IC klass is cached
74 const Register SYNC_header = rax; // synchronization header
75 const Register SHIFT_count = rcx; // where count for shift operations must be
76
77 #define __ _masm->
78
79
80 static void select_different_registers(Register preserve,
81 Register extra,
82 Register &tmp1,
83 Register &tmp2) {
84 if (tmp1 == preserve) {
85 assert_different_registers(tmp1, tmp2, extra);
86 tmp1 = extra;
87 } else if (tmp2 == preserve) {
88 assert_different_registers(tmp1, tmp2, extra);
89 tmp2 = extra;
90 }
91 assert_different_registers(preserve, tmp1, tmp2);
92 }
93
94
95
96 static void select_different_registers(Register preserve,
97 Register extra,
98 Register &tmp1,
99 Register &tmp2,
100 Register &tmp3) {
101 if (tmp1 == preserve) {
102 assert_different_registers(tmp1, tmp2, tmp3, extra);
103 tmp1 = extra;
104 } else if (tmp2 == preserve) {
105 assert_different_registers(tmp1, tmp2, tmp3, extra);
106 tmp2 = extra;
107 } else if (tmp3 == preserve) {
108 assert_different_registers(tmp1, tmp2, tmp3, extra);
109 tmp3 = extra;
110 }
111 assert_different_registers(preserve, tmp1, tmp2, tmp3);
112 }
113
114
115
116 bool LIR_Assembler::is_small_constant(LIR_Opr opr) {
117 if (opr->is_constant()) {
118 LIR_Const* constant = opr->as_constant_ptr();
119 switch (constant->type()) {
120 case T_INT: {
121 return true;
122 }
123
124 default:
125 return false;
126 }
127 }
128 return false;
129 }
130
131
132 LIR_Opr LIR_Assembler::receiverOpr() {
133 return FrameMap::receiver_opr;
134 }
135
136 LIR_Opr LIR_Assembler::osrBufferPointer() {
137 return FrameMap::as_pointer_opr(receiverOpr()->as_register());
138 }
139
140 //--------------fpu register translations-----------------------
141
142
143 address LIR_Assembler::float_constant(float f) {
144 address const_addr = __ float_constant(f);
145 if (const_addr == NULL) {
146 bailout("const section overflow");
147 return __ code()->consts()->start();
148 } else {
149 return const_addr;
150 }
151 }
152
153
154 address LIR_Assembler::double_constant(double d) {
155 address const_addr = __ double_constant(d);
156 if (const_addr == NULL) {
157 bailout("const section overflow");
158 return __ code()->consts()->start();
159 } else {
160 return const_addr;
161 }
162 }
163
164
165 void LIR_Assembler::set_24bit_FPU() {
166 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_24()));
167 }
168
169 void LIR_Assembler::reset_FPU() {
170 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
171 }
172
173 void LIR_Assembler::fpop() {
174 __ fpop();
175 }
176
177 void LIR_Assembler::fxch(int i) {
178 __ fxch(i);
179 }
180
181 void LIR_Assembler::fld(int i) {
182 __ fld_s(i);
183 }
184
185 void LIR_Assembler::ffree(int i) {
186 __ ffree(i);
187 }
188
189 void LIR_Assembler::breakpoint() {
190 __ int3();
191 }
192
193 void LIR_Assembler::push(LIR_Opr opr) {
194 if (opr->is_single_cpu()) {
195 __ push_reg(opr->as_register());
196 } else if (opr->is_double_cpu()) {
197 NOT_LP64(__ push_reg(opr->as_register_hi()));
198 __ push_reg(opr->as_register_lo());
199 } else if (opr->is_stack()) {
200 __ push_addr(frame_map()->address_for_slot(opr->single_stack_ix()));
201 } else if (opr->is_constant()) {
202 LIR_Const* const_opr = opr->as_constant_ptr();
203 if (const_opr->type() == T_OBJECT) {
204 __ push_oop(const_opr->as_jobject());
205 } else if (const_opr->type() == T_INT) {
206 __ push_jint(const_opr->as_jint());
207 } else {
208 ShouldNotReachHere();
209 }
210
211 } else {
212 ShouldNotReachHere();
213 }
214 }
215
216 void LIR_Assembler::pop(LIR_Opr opr) {
217 if (opr->is_single_cpu()) {
218 __ pop_reg(opr->as_register());
219 } else {
220 ShouldNotReachHere();
221 }
222 }
223
224 bool LIR_Assembler::is_literal_address(LIR_Address* addr) {
225 return addr->base()->is_illegal() && addr->index()->is_illegal();
226 }
227
228 //-------------------------------------------
229
230 Address LIR_Assembler::as_Address(LIR_Address* addr) {
231 return as_Address(addr, rscratch1);
232 }
233
234 Address LIR_Assembler::as_Address(LIR_Address* addr, Register tmp) {
235 if (addr->base()->is_illegal()) {
236 assert(addr->index()->is_illegal(), "must be illegal too");
237 AddressLiteral laddr((address)addr->disp(), relocInfo::none);
238 if (! __ reachable(laddr)) {
239 __ movptr(tmp, laddr.addr());
240 Address res(tmp, 0);
241 return res;
242 } else {
243 return __ as_Address(laddr);
244 }
245 }
246
247 Register base = addr->base()->as_pointer_register();
248
249 if (addr->index()->is_illegal()) {
250 return Address( base, addr->disp());
251 } else if (addr->index()->is_cpu_register()) {
252 Register index = addr->index()->as_pointer_register();
253 return Address(base, index, (Address::ScaleFactor) addr->scale(), addr->disp());
254 } else if (addr->index()->is_constant()) {
255 intptr_t addr_offset = (addr->index()->as_constant_ptr()->as_jint() << addr->scale()) + addr->disp();
256 assert(Assembler::is_simm32(addr_offset), "must be");
257
258 return Address(base, addr_offset);
259 } else {
260 Unimplemented();
261 return Address();
262 }
263 }
264
265
266 Address LIR_Assembler::as_Address_hi(LIR_Address* addr) {
267 Address base = as_Address(addr);
268 return Address(base._base, base._index, base._scale, base._disp + BytesPerWord);
269 }
270
271
272 Address LIR_Assembler::as_Address_lo(LIR_Address* addr) {
273 return as_Address(addr);
274 }
275
276
277 void LIR_Assembler::osr_entry() {
278 offsets()->set_value(CodeOffsets::OSR_Entry, code_offset());
279 BlockBegin* osr_entry = compilation()->hir()->osr_entry();
280 ValueStack* entry_state = osr_entry->state();
281 int number_of_locks = entry_state->locks_size();
282
283 // we jump here if osr happens with the interpreter
284 // state set up to continue at the beginning of the
285 // loop that triggered osr - in particular, we have
286 // the following registers setup:
287 //
288 // rcx: osr buffer
289 //
290
291 // build frame
292 ciMethod* m = compilation()->method();
293 __ build_frame(initial_frame_size_in_bytes(), bang_size_in_bytes());
294
295 // OSR buffer is
296 //
297 // locals[nlocals-1..0]
298 // monitors[0..number_of_locks]
299 //
300 // locals is a direct copy of the interpreter frame so in the osr buffer
301 // so first slot in the local array is the last local from the interpreter
302 // and last slot is local[0] (receiver) from the interpreter
303 //
304 // Similarly with locks. The first lock slot in the osr buffer is the nth lock
305 // from the interpreter frame, the nth lock slot in the osr buffer is 0th lock
306 // in the interpreter frame (the method lock if a sync method)
307
308 // Initialize monitors in the compiled activation.
309 // rcx: pointer to osr buffer
310 //
311 // All other registers are dead at this point and the locals will be
312 // copied into place by code emitted in the IR.
313
314 Register OSR_buf = osrBufferPointer()->as_pointer_register();
315 { assert(frame::interpreter_frame_monitor_size() == BasicObjectLock::size(), "adjust code below");
316 int monitor_offset = BytesPerWord * method()->max_locals() +
317 (BasicObjectLock::size() * BytesPerWord) * (number_of_locks - 1);
318 // SharedRuntime::OSR_migration_begin() packs BasicObjectLocks in
319 // the OSR buffer using 2 word entries: first the lock and then
320 // the oop.
321 for (int i = 0; i < number_of_locks; i++) {
322 int slot_offset = monitor_offset - ((i * 2) * BytesPerWord);
323 #ifdef ASSERT
324 // verify the interpreter's monitor has a non-null object
325 {
326 Label L;
327 __ cmpptr(Address(OSR_buf, slot_offset + 1*BytesPerWord), (int32_t)NULL_WORD);
328 __ jcc(Assembler::notZero, L);
329 __ stop("locked object is NULL");
330 __ bind(L);
331 }
332 #endif
333 __ movptr(rbx, Address(OSR_buf, slot_offset + 0));
334 __ movptr(frame_map()->address_for_monitor_lock(i), rbx);
335 __ movptr(rbx, Address(OSR_buf, slot_offset + 1*BytesPerWord));
336 __ movptr(frame_map()->address_for_monitor_object(i), rbx);
337 }
338 }
339 }
340
341
342 // inline cache check; done before the frame is built.
343 int LIR_Assembler::check_icache() {
344 Register receiver = FrameMap::receiver_opr->as_register();
345 Register ic_klass = IC_Klass;
346 const int ic_cmp_size = LP64_ONLY(10) NOT_LP64(9);
347 const bool do_post_padding = VerifyOops || UseCompressedClassPointers;
348 if (!do_post_padding) {
349 // insert some nops so that the verified entry point is aligned on CodeEntryAlignment
350 __ align(CodeEntryAlignment, __ offset() + ic_cmp_size);
351 }
352 int offset = __ offset();
353 __ inline_cache_check(receiver, IC_Klass);
354 assert(__ offset() % CodeEntryAlignment == 0 || do_post_padding, "alignment must be correct");
355 if (do_post_padding) {
356 // force alignment after the cache check.
357 // It's been verified to be aligned if !VerifyOops
358 __ align(CodeEntryAlignment);
359 }
360 return offset;
361 }
362
363
364 void LIR_Assembler::jobject2reg_with_patching(Register reg, CodeEmitInfo* info) {
365 jobject o = NULL;
366 PatchingStub* patch = new PatchingStub(_masm, patching_id(info));
367 __ movoop(reg, o);
368 patching_epilog(patch, lir_patch_normal, reg, info);
369 }
370
371 void LIR_Assembler::klass2reg_with_patching(Register reg, CodeEmitInfo* info) {
372 Metadata* o = NULL;
373 PatchingStub* patch = new PatchingStub(_masm, PatchingStub::load_klass_id);
374 __ mov_metadata(reg, o);
375 patching_epilog(patch, lir_patch_normal, reg, info);
376 }
377
378 // This specifies the rsp decrement needed to build the frame
379 int LIR_Assembler::initial_frame_size_in_bytes() const {
380 // if rounding, must let FrameMap know!
381
382 // The frame_map records size in slots (32bit word)
383
384 // subtract two words to account for return address and link
385 return (frame_map()->framesize() - (2*VMRegImpl::slots_per_word)) * VMRegImpl::stack_slot_size;
386 }
387
388
389 int LIR_Assembler::emit_exception_handler() {
390 // if the last instruction is a call (typically to do a throw which
391 // is coming at the end after block reordering) the return address
392 // must still point into the code area in order to avoid assertion
393 // failures when searching for the corresponding bci => add a nop
394 // (was bug 5/14/1999 - gri)
395 __ nop();
396
397 // generate code for exception handler
398 address handler_base = __ start_a_stub(exception_handler_size());
399 if (handler_base == NULL) {
400 // not enough space left for the handler
401 bailout("exception handler overflow");
402 return -1;
403 }
404
405 int offset = code_offset();
406
407 // the exception oop and pc are in rax, and rdx
408 // no other registers need to be preserved, so invalidate them
409 __ invalidate_registers(false, true, true, false, true, true);
410
411 // check that there is really an exception
412 __ verify_not_null_oop(rax);
413
414 // search an exception handler (rax: exception oop, rdx: throwing pc)
415 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::handle_exception_from_callee_id)));
416 __ should_not_reach_here();
417 guarantee(code_offset() - offset <= exception_handler_size(), "overflow");
418 __ end_a_stub();
419
420 return offset;
421 }
422
423
424 // Emit the code to remove the frame from the stack in the exception
425 // unwind path.
426 int LIR_Assembler::emit_unwind_handler() {
427 #ifndef PRODUCT
428 if (CommentedAssembly) {
429 _masm->block_comment("Unwind handler");
430 }
431 #endif
432
433 int offset = code_offset();
434
435 // Fetch the exception from TLS and clear out exception related thread state
436 Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread);
437 NOT_LP64(__ get_thread(rsi));
438 __ movptr(rax, Address(thread, JavaThread::exception_oop_offset()));
439 __ movptr(Address(thread, JavaThread::exception_oop_offset()), (intptr_t)NULL_WORD);
440 __ movptr(Address(thread, JavaThread::exception_pc_offset()), (intptr_t)NULL_WORD);
441
442 __ bind(_unwind_handler_entry);
443 __ verify_not_null_oop(rax);
444 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
445 __ mov(rbx, rax); // Preserve the exception (rbx is always callee-saved)
446 }
447
448 // Preform needed unlocking
449 MonitorExitStub* stub = NULL;
450 if (method()->is_synchronized()) {
451 monitor_address(0, FrameMap::rax_opr);
452 stub = new MonitorExitStub(FrameMap::rax_opr, true, 0);
453 __ unlock_object(rdi, rsi, rax, *stub->entry());
454 __ bind(*stub->continuation());
455 }
456
457 if (compilation()->env()->dtrace_method_probes()) {
458 #ifdef _LP64
459 __ mov(rdi, r15_thread);
460 __ mov_metadata(rsi, method()->constant_encoding());
461 #else
462 __ get_thread(rax);
463 __ movptr(Address(rsp, 0), rax);
464 __ mov_metadata(Address(rsp, sizeof(void*)), method()->constant_encoding());
465 #endif
466 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit)));
467 }
468
469 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
470 __ mov(rax, rbx); // Restore the exception
471 }
472
473 // remove the activation and dispatch to the unwind handler
474 __ remove_frame(initial_frame_size_in_bytes());
475 __ jump(RuntimeAddress(Runtime1::entry_for(Runtime1::unwind_exception_id)));
476
477 // Emit the slow path assembly
478 if (stub != NULL) {
479 stub->emit_code(this);
480 }
481
482 return offset;
483 }
484
485
486 int LIR_Assembler::emit_deopt_handler() {
487 // if the last instruction is a call (typically to do a throw which
488 // is coming at the end after block reordering) the return address
489 // must still point into the code area in order to avoid assertion
490 // failures when searching for the corresponding bci => add a nop
491 // (was bug 5/14/1999 - gri)
492 __ nop();
493
494 // generate code for exception handler
495 address handler_base = __ start_a_stub(deopt_handler_size());
496 if (handler_base == NULL) {
497 // not enough space left for the handler
498 bailout("deopt handler overflow");
499 return -1;
500 }
501
502 int offset = code_offset();
503 InternalAddress here(__ pc());
504
505 __ pushptr(here.addr());
506 __ jump(RuntimeAddress(SharedRuntime::deopt_blob()->unpack()));
507 guarantee(code_offset() - offset <= deopt_handler_size(), "overflow");
508 __ end_a_stub();
509
510 return offset;
511 }
512
513
514 void LIR_Assembler::return_op(LIR_Opr result) {
515 assert(result->is_illegal() || !result->is_single_cpu() || result->as_register() == rax, "word returns are in rax,");
516 if (!result->is_illegal() && result->is_float_kind() && !result->is_xmm_register()) {
517 assert(result->fpu() == 0, "result must already be on TOS");
518 }
519
520 // Pop the stack before the safepoint code
521 __ remove_frame(initial_frame_size_in_bytes());
522
523 if (StackReservedPages > 0 && compilation()->has_reserved_stack_access()) {
524 __ reserved_stack_check();
525 }
526
527 bool result_is_oop = result->is_valid() ? result->is_oop() : false;
528
529 // Note: we do not need to round double result; float result has the right precision
530 // the poll sets the condition code, but no data registers
531
532 if (SafepointMechanism::uses_thread_local_poll()) {
533 #ifdef _LP64
534 const Register poll_addr = rscratch1;
535 __ movptr(poll_addr, Address(r15_thread, Thread::polling_page_offset()));
536 #else
537 const Register poll_addr = rbx;
538 assert(FrameMap::is_caller_save_register(poll_addr), "will overwrite");
539 __ get_thread(poll_addr);
540 __ movptr(poll_addr, Address(poll_addr, Thread::polling_page_offset()));
541 #endif
542 __ relocate(relocInfo::poll_return_type);
543 __ testl(rax, Address(poll_addr, 0));
544 } else {
545 AddressLiteral polling_page(os::get_polling_page(), relocInfo::poll_return_type);
546
547 if (Assembler::is_polling_page_far()) {
548 __ lea(rscratch1, polling_page);
549 __ relocate(relocInfo::poll_return_type);
550 __ testl(rax, Address(rscratch1, 0));
551 } else {
552 __ testl(rax, polling_page);
553 }
554 }
555 __ ret(0);
556 }
557
558
559 int LIR_Assembler::safepoint_poll(LIR_Opr tmp, CodeEmitInfo* info) {
560 guarantee(info != NULL, "Shouldn't be NULL");
561 int offset = __ offset();
562 if (SafepointMechanism::uses_thread_local_poll()) {
563 #ifdef _LP64
564 const Register poll_addr = rscratch1;
565 __ movptr(poll_addr, Address(r15_thread, Thread::polling_page_offset()));
566 #else
567 assert(tmp->is_cpu_register(), "needed");
568 const Register poll_addr = tmp->as_register();
569 __ get_thread(poll_addr);
570 __ movptr(poll_addr, Address(poll_addr, in_bytes(Thread::polling_page_offset())));
571 #endif
572 add_debug_info_for_branch(info);
573 __ relocate(relocInfo::poll_type);
574 address pre_pc = __ pc();
575 __ testl(rax, Address(poll_addr, 0));
576 address post_pc = __ pc();
577 guarantee(pointer_delta(post_pc, pre_pc, 1) == 2 LP64_ONLY(+1), "must be exact length");
578 } else {
579 AddressLiteral polling_page(os::get_polling_page(), relocInfo::poll_type);
580 if (Assembler::is_polling_page_far()) {
581 __ lea(rscratch1, polling_page);
582 offset = __ offset();
583 add_debug_info_for_branch(info);
584 __ relocate(relocInfo::poll_type);
585 __ testl(rax, Address(rscratch1, 0));
586 } else {
587 add_debug_info_for_branch(info);
588 __ testl(rax, polling_page);
589 }
590 }
591 return offset;
592 }
593
594
595 void LIR_Assembler::move_regs(Register from_reg, Register to_reg) {
596 if (from_reg != to_reg) __ mov(to_reg, from_reg);
597 }
598
599 void LIR_Assembler::swap_reg(Register a, Register b) {
600 __ xchgptr(a, b);
601 }
602
603
604 void LIR_Assembler::const2reg(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) {
605 assert(src->is_constant(), "should not call otherwise");
606 assert(dest->is_register(), "should not call otherwise");
607 LIR_Const* c = src->as_constant_ptr();
608
609 switch (c->type()) {
610 case T_INT: {
611 assert(patch_code == lir_patch_none, "no patching handled here");
612 __ movl(dest->as_register(), c->as_jint());
613 break;
614 }
615
616 case T_ADDRESS: {
617 assert(patch_code == lir_patch_none, "no patching handled here");
618 __ movptr(dest->as_register(), c->as_jint());
619 break;
620 }
621
622 case T_LONG: {
623 assert(patch_code == lir_patch_none, "no patching handled here");
624 #ifdef _LP64
625 __ movptr(dest->as_register_lo(), (intptr_t)c->as_jlong());
626 #else
627 __ movptr(dest->as_register_lo(), c->as_jint_lo());
628 __ movptr(dest->as_register_hi(), c->as_jint_hi());
629 #endif // _LP64
630 break;
631 }
632
633 case T_OBJECT: {
634 if (patch_code != lir_patch_none) {
635 jobject2reg_with_patching(dest->as_register(), info);
636 } else {
637 __ movoop(dest->as_register(), c->as_jobject());
638 }
639 break;
640 }
641
642 case T_METADATA: {
643 if (patch_code != lir_patch_none) {
644 klass2reg_with_patching(dest->as_register(), info);
645 } else {
646 __ mov_metadata(dest->as_register(), c->as_metadata());
647 }
648 break;
649 }
650
651 case T_FLOAT: {
652 if (dest->is_single_xmm()) {
653 if (c->is_zero_float()) {
654 __ xorps(dest->as_xmm_float_reg(), dest->as_xmm_float_reg());
655 } else {
656 __ movflt(dest->as_xmm_float_reg(),
657 InternalAddress(float_constant(c->as_jfloat())));
658 }
659 } else {
660 assert(dest->is_single_fpu(), "must be");
661 assert(dest->fpu_regnr() == 0, "dest must be TOS");
662 if (c->is_zero_float()) {
663 __ fldz();
664 } else if (c->is_one_float()) {
665 __ fld1();
666 } else {
667 __ fld_s (InternalAddress(float_constant(c->as_jfloat())));
668 }
669 }
670 break;
671 }
672
673 case T_DOUBLE: {
674 if (dest->is_double_xmm()) {
675 if (c->is_zero_double()) {
676 __ xorpd(dest->as_xmm_double_reg(), dest->as_xmm_double_reg());
677 } else {
678 __ movdbl(dest->as_xmm_double_reg(),
679 InternalAddress(double_constant(c->as_jdouble())));
680 }
681 } else {
682 assert(dest->is_double_fpu(), "must be");
683 assert(dest->fpu_regnrLo() == 0, "dest must be TOS");
684 if (c->is_zero_double()) {
685 __ fldz();
686 } else if (c->is_one_double()) {
687 __ fld1();
688 } else {
689 __ fld_d (InternalAddress(double_constant(c->as_jdouble())));
690 }
691 }
692 break;
693 }
694
695 default:
696 ShouldNotReachHere();
697 }
698 }
699
700 void LIR_Assembler::const2stack(LIR_Opr src, LIR_Opr dest) {
701 assert(src->is_constant(), "should not call otherwise");
702 assert(dest->is_stack(), "should not call otherwise");
703 LIR_Const* c = src->as_constant_ptr();
704
705 switch (c->type()) {
706 case T_INT: // fall through
707 case T_FLOAT:
708 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits());
709 break;
710
711 case T_ADDRESS:
712 __ movptr(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits());
713 break;
714
715 case T_OBJECT:
716 __ movoop(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jobject());
717 break;
718
719 case T_LONG: // fall through
720 case T_DOUBLE:
721 #ifdef _LP64
722 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(),
723 lo_word_offset_in_bytes), (intptr_t)c->as_jlong_bits());
724 #else
725 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(),
726 lo_word_offset_in_bytes), c->as_jint_lo_bits());
727 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(),
728 hi_word_offset_in_bytes), c->as_jint_hi_bits());
729 #endif // _LP64
730 break;
731
732 default:
733 ShouldNotReachHere();
734 }
735 }
736
737 void LIR_Assembler::const2mem(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info, bool wide) {
738 assert(src->is_constant(), "should not call otherwise");
739 assert(dest->is_address(), "should not call otherwise");
740 LIR_Const* c = src->as_constant_ptr();
741 LIR_Address* addr = dest->as_address_ptr();
742
743 int null_check_here = code_offset();
744 switch (type) {
745 case T_INT: // fall through
746 case T_FLOAT:
747 __ movl(as_Address(addr), c->as_jint_bits());
748 break;
749
750 case T_ADDRESS:
751 __ movptr(as_Address(addr), c->as_jint_bits());
752 break;
753
754 case T_OBJECT: // fall through
755 case T_ARRAY:
756 if (c->as_jobject() == NULL) {
757 if (UseCompressedOops && !wide) {
758 __ movl(as_Address(addr), (int32_t)NULL_WORD);
759 } else {
760 #ifdef _LP64
761 __ xorptr(rscratch1, rscratch1);
762 null_check_here = code_offset();
763 __ movptr(as_Address(addr), rscratch1);
764 #else
765 __ movptr(as_Address(addr), NULL_WORD);
766 #endif
767 }
768 } else {
769 if (is_literal_address(addr)) {
770 ShouldNotReachHere();
771 __ movoop(as_Address(addr, noreg), c->as_jobject());
772 } else {
773 #ifdef _LP64
774 __ movoop(rscratch1, c->as_jobject());
775 if (UseCompressedOops && !wide) {
776 __ encode_heap_oop(rscratch1);
777 null_check_here = code_offset();
778 __ movl(as_Address_lo(addr), rscratch1);
779 } else {
780 null_check_here = code_offset();
781 __ movptr(as_Address_lo(addr), rscratch1);
782 }
783 #else
784 __ movoop(as_Address(addr), c->as_jobject());
785 #endif
786 }
787 }
788 break;
789
790 case T_LONG: // fall through
791 case T_DOUBLE:
792 #ifdef _LP64
793 if (is_literal_address(addr)) {
794 ShouldNotReachHere();
795 __ movptr(as_Address(addr, r15_thread), (intptr_t)c->as_jlong_bits());
796 } else {
797 __ movptr(r10, (intptr_t)c->as_jlong_bits());
798 null_check_here = code_offset();
799 __ movptr(as_Address_lo(addr), r10);
800 }
801 #else
802 // Always reachable in 32bit so this doesn't produce useless move literal
803 __ movptr(as_Address_hi(addr), c->as_jint_hi_bits());
804 __ movptr(as_Address_lo(addr), c->as_jint_lo_bits());
805 #endif // _LP64
806 break;
807
808 case T_BOOLEAN: // fall through
809 case T_BYTE:
810 __ movb(as_Address(addr), c->as_jint() & 0xFF);
811 break;
812
813 case T_CHAR: // fall through
814 case T_SHORT:
815 __ movw(as_Address(addr), c->as_jint() & 0xFFFF);
816 break;
817
818 default:
819 ShouldNotReachHere();
820 };
821
822 if (info != NULL) {
823 add_debug_info_for_null_check(null_check_here, info);
824 }
825 }
826
827
828 void LIR_Assembler::reg2reg(LIR_Opr src, LIR_Opr dest) {
829 assert(src->is_register(), "should not call otherwise");
830 assert(dest->is_register(), "should not call otherwise");
831
832 // move between cpu-registers
833 if (dest->is_single_cpu()) {
834 #ifdef _LP64
835 if (src->type() == T_LONG) {
836 // Can do LONG -> OBJECT
837 move_regs(src->as_register_lo(), dest->as_register());
838 return;
839 }
840 #endif
841 assert(src->is_single_cpu(), "must match");
842 if (src->type() == T_OBJECT) {
843 __ verify_oop(src->as_register());
844 }
845 move_regs(src->as_register(), dest->as_register());
846
847 } else if (dest->is_double_cpu()) {
848 #ifdef _LP64
849 if (src->type() == T_OBJECT || src->type() == T_ARRAY) {
850 // Surprising to me but we can see move of a long to t_object
851 __ verify_oop(src->as_register());
852 move_regs(src->as_register(), dest->as_register_lo());
853 return;
854 }
855 #endif
856 assert(src->is_double_cpu(), "must match");
857 Register f_lo = src->as_register_lo();
858 Register f_hi = src->as_register_hi();
859 Register t_lo = dest->as_register_lo();
860 Register t_hi = dest->as_register_hi();
861 #ifdef _LP64
862 assert(f_hi == f_lo, "must be same");
863 assert(t_hi == t_lo, "must be same");
864 move_regs(f_lo, t_lo);
865 #else
866 assert(f_lo != f_hi && t_lo != t_hi, "invalid register allocation");
867
868
869 if (f_lo == t_hi && f_hi == t_lo) {
870 swap_reg(f_lo, f_hi);
871 } else if (f_hi == t_lo) {
872 assert(f_lo != t_hi, "overwriting register");
873 move_regs(f_hi, t_hi);
874 move_regs(f_lo, t_lo);
875 } else {
876 assert(f_hi != t_lo, "overwriting register");
877 move_regs(f_lo, t_lo);
878 move_regs(f_hi, t_hi);
879 }
880 #endif // LP64
881
882 // special moves from fpu-register to xmm-register
883 // necessary for method results
884 } else if (src->is_single_xmm() && !dest->is_single_xmm()) {
885 __ movflt(Address(rsp, 0), src->as_xmm_float_reg());
886 __ fld_s(Address(rsp, 0));
887 } else if (src->is_double_xmm() && !dest->is_double_xmm()) {
888 __ movdbl(Address(rsp, 0), src->as_xmm_double_reg());
889 __ fld_d(Address(rsp, 0));
890 } else if (dest->is_single_xmm() && !src->is_single_xmm()) {
891 __ fstp_s(Address(rsp, 0));
892 __ movflt(dest->as_xmm_float_reg(), Address(rsp, 0));
893 } else if (dest->is_double_xmm() && !src->is_double_xmm()) {
894 __ fstp_d(Address(rsp, 0));
895 __ movdbl(dest->as_xmm_double_reg(), Address(rsp, 0));
896
897 // move between xmm-registers
898 } else if (dest->is_single_xmm()) {
899 assert(src->is_single_xmm(), "must match");
900 __ movflt(dest->as_xmm_float_reg(), src->as_xmm_float_reg());
901 } else if (dest->is_double_xmm()) {
902 assert(src->is_double_xmm(), "must match");
903 __ movdbl(dest->as_xmm_double_reg(), src->as_xmm_double_reg());
904
905 // move between fpu-registers (no instruction necessary because of fpu-stack)
906 } else if (dest->is_single_fpu() || dest->is_double_fpu()) {
907 assert(src->is_single_fpu() || src->is_double_fpu(), "must match");
908 assert(src->fpu() == dest->fpu(), "currently should be nothing to do");
909 } else {
910 ShouldNotReachHere();
911 }
912 }
913
914 void LIR_Assembler::reg2stack(LIR_Opr src, LIR_Opr dest, BasicType type, bool pop_fpu_stack) {
915 assert(src->is_register(), "should not call otherwise");
916 assert(dest->is_stack(), "should not call otherwise");
917
918 if (src->is_single_cpu()) {
919 Address dst = frame_map()->address_for_slot(dest->single_stack_ix());
920 if (type == T_OBJECT || type == T_ARRAY) {
921 __ verify_oop(src->as_register());
922 __ movptr (dst, src->as_register());
923 } else if (type == T_METADATA) {
924 __ movptr (dst, src->as_register());
925 } else {
926 __ movl (dst, src->as_register());
927 }
928
929 } else if (src->is_double_cpu()) {
930 Address dstLO = frame_map()->address_for_slot(dest->double_stack_ix(), lo_word_offset_in_bytes);
931 Address dstHI = frame_map()->address_for_slot(dest->double_stack_ix(), hi_word_offset_in_bytes);
932 __ movptr (dstLO, src->as_register_lo());
933 NOT_LP64(__ movptr (dstHI, src->as_register_hi()));
934
935 } else if (src->is_single_xmm()) {
936 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix());
937 __ movflt(dst_addr, src->as_xmm_float_reg());
938
939 } else if (src->is_double_xmm()) {
940 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix());
941 __ movdbl(dst_addr, src->as_xmm_double_reg());
942
943 } else if (src->is_single_fpu()) {
944 assert(src->fpu_regnr() == 0, "argument must be on TOS");
945 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix());
946 if (pop_fpu_stack) __ fstp_s (dst_addr);
947 else __ fst_s (dst_addr);
948
949 } else if (src->is_double_fpu()) {
950 assert(src->fpu_regnrLo() == 0, "argument must be on TOS");
951 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix());
952 if (pop_fpu_stack) __ fstp_d (dst_addr);
953 else __ fst_d (dst_addr);
954
955 } else {
956 ShouldNotReachHere();
957 }
958 }
959
960
961 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 */) {
962 LIR_Address* to_addr = dest->as_address_ptr();
963 PatchingStub* patch = NULL;
964 Register compressed_src = rscratch1;
965
966 if (type == T_ARRAY || type == T_OBJECT) {
967 __ verify_oop(src->as_register());
968 #ifdef _LP64
969 if (UseCompressedOops && !wide) {
970 __ movptr(compressed_src, src->as_register());
971 __ encode_heap_oop(compressed_src);
972 if (patch_code != lir_patch_none) {
973 info->oop_map()->set_narrowoop(compressed_src->as_VMReg());
974 }
975 }
976 #endif
977 }
978
979 if (patch_code != lir_patch_none) {
980 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
981 Address toa = as_Address(to_addr);
982 assert(toa.disp() != 0, "must have");
983 }
984
985 int null_check_here = code_offset();
986 switch (type) {
987 case T_FLOAT: {
988 if (src->is_single_xmm()) {
989 __ movflt(as_Address(to_addr), src->as_xmm_float_reg());
990 } else {
991 assert(src->is_single_fpu(), "must be");
992 assert(src->fpu_regnr() == 0, "argument must be on TOS");
993 if (pop_fpu_stack) __ fstp_s(as_Address(to_addr));
994 else __ fst_s (as_Address(to_addr));
995 }
996 break;
997 }
998
999 case T_DOUBLE: {
1000 if (src->is_double_xmm()) {
1001 __ movdbl(as_Address(to_addr), src->as_xmm_double_reg());
1002 } else {
1003 assert(src->is_double_fpu(), "must be");
1004 assert(src->fpu_regnrLo() == 0, "argument must be on TOS");
1005 if (pop_fpu_stack) __ fstp_d(as_Address(to_addr));
1006 else __ fst_d (as_Address(to_addr));
1007 }
1008 break;
1009 }
1010
1011 case T_ARRAY: // fall through
1012 case T_OBJECT: // fall through
1013 if (UseCompressedOops && !wide) {
1014 __ movl(as_Address(to_addr), compressed_src);
1015 } else {
1016 __ movptr(as_Address(to_addr), src->as_register());
1017 }
1018 break;
1019 case T_METADATA:
1020 // We get here to store a method pointer to the stack to pass to
1021 // a dtrace runtime call. This can't work on 64 bit with
1022 // compressed klass ptrs: T_METADATA can be a compressed klass
1023 // ptr or a 64 bit method pointer.
1024 LP64_ONLY(ShouldNotReachHere());
1025 __ movptr(as_Address(to_addr), src->as_register());
1026 break;
1027 case T_ADDRESS:
1028 __ movptr(as_Address(to_addr), src->as_register());
1029 break;
1030 case T_INT:
1031 __ movl(as_Address(to_addr), src->as_register());
1032 break;
1033
1034 case T_LONG: {
1035 Register from_lo = src->as_register_lo();
1036 Register from_hi = src->as_register_hi();
1037 #ifdef _LP64
1038 __ movptr(as_Address_lo(to_addr), from_lo);
1039 #else
1040 Register base = to_addr->base()->as_register();
1041 Register index = noreg;
1042 if (to_addr->index()->is_register()) {
1043 index = to_addr->index()->as_register();
1044 }
1045 if (base == from_lo || index == from_lo) {
1046 assert(base != from_hi, "can't be");
1047 assert(index == noreg || (index != base && index != from_hi), "can't handle this");
1048 __ movl(as_Address_hi(to_addr), from_hi);
1049 if (patch != NULL) {
1050 patching_epilog(patch, lir_patch_high, base, info);
1051 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1052 patch_code = lir_patch_low;
1053 }
1054 __ movl(as_Address_lo(to_addr), from_lo);
1055 } else {
1056 assert(index == noreg || (index != base && index != from_lo), "can't handle this");
1057 __ movl(as_Address_lo(to_addr), from_lo);
1058 if (patch != NULL) {
1059 patching_epilog(patch, lir_patch_low, base, info);
1060 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1061 patch_code = lir_patch_high;
1062 }
1063 __ movl(as_Address_hi(to_addr), from_hi);
1064 }
1065 #endif // _LP64
1066 break;
1067 }
1068
1069 case T_BYTE: // fall through
1070 case T_BOOLEAN: {
1071 Register src_reg = src->as_register();
1072 Address dst_addr = as_Address(to_addr);
1073 assert(VM_Version::is_P6() || src_reg->has_byte_register(), "must use byte registers if not P6");
1074 __ movb(dst_addr, src_reg);
1075 break;
1076 }
1077
1078 case T_CHAR: // fall through
1079 case T_SHORT:
1080 __ movw(as_Address(to_addr), src->as_register());
1081 break;
1082
1083 default:
1084 ShouldNotReachHere();
1085 }
1086 if (info != NULL) {
1087 add_debug_info_for_null_check(null_check_here, info);
1088 }
1089
1090 if (patch_code != lir_patch_none) {
1091 patching_epilog(patch, patch_code, to_addr->base()->as_register(), info);
1092 }
1093 }
1094
1095
1096 void LIR_Assembler::stack2reg(LIR_Opr src, LIR_Opr dest, BasicType type) {
1097 assert(src->is_stack(), "should not call otherwise");
1098 assert(dest->is_register(), "should not call otherwise");
1099
1100 if (dest->is_single_cpu()) {
1101 if (type == T_ARRAY || type == T_OBJECT) {
1102 __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()));
1103 __ verify_oop(dest->as_register());
1104 } else if (type == T_METADATA) {
1105 __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()));
1106 } else {
1107 __ movl(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()));
1108 }
1109
1110 } else if (dest->is_double_cpu()) {
1111 Address src_addr_LO = frame_map()->address_for_slot(src->double_stack_ix(), lo_word_offset_in_bytes);
1112 Address src_addr_HI = frame_map()->address_for_slot(src->double_stack_ix(), hi_word_offset_in_bytes);
1113 __ movptr(dest->as_register_lo(), src_addr_LO);
1114 NOT_LP64(__ movptr(dest->as_register_hi(), src_addr_HI));
1115
1116 } else if (dest->is_single_xmm()) {
1117 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix());
1118 __ movflt(dest->as_xmm_float_reg(), src_addr);
1119
1120 } else if (dest->is_double_xmm()) {
1121 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix());
1122 __ movdbl(dest->as_xmm_double_reg(), src_addr);
1123
1124 } else if (dest->is_single_fpu()) {
1125 assert(dest->fpu_regnr() == 0, "dest must be TOS");
1126 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix());
1127 __ fld_s(src_addr);
1128
1129 } else if (dest->is_double_fpu()) {
1130 assert(dest->fpu_regnrLo() == 0, "dest must be TOS");
1131 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix());
1132 __ fld_d(src_addr);
1133
1134 } else {
1135 ShouldNotReachHere();
1136 }
1137 }
1138
1139
1140 void LIR_Assembler::stack2stack(LIR_Opr src, LIR_Opr dest, BasicType type) {
1141 if (src->is_single_stack()) {
1142 if (type == T_OBJECT || type == T_ARRAY) {
1143 __ pushptr(frame_map()->address_for_slot(src ->single_stack_ix()));
1144 __ popptr (frame_map()->address_for_slot(dest->single_stack_ix()));
1145 } else {
1146 #ifndef _LP64
1147 __ pushl(frame_map()->address_for_slot(src ->single_stack_ix()));
1148 __ popl (frame_map()->address_for_slot(dest->single_stack_ix()));
1149 #else
1150 //no pushl on 64bits
1151 __ movl(rscratch1, frame_map()->address_for_slot(src ->single_stack_ix()));
1152 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), rscratch1);
1153 #endif
1154 }
1155
1156 } else if (src->is_double_stack()) {
1157 #ifdef _LP64
1158 __ pushptr(frame_map()->address_for_slot(src ->double_stack_ix()));
1159 __ popptr (frame_map()->address_for_slot(dest->double_stack_ix()));
1160 #else
1161 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 0));
1162 // push and pop the part at src + wordSize, adding wordSize for the previous push
1163 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 2 * wordSize));
1164 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 2 * wordSize));
1165 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 0));
1166 #endif // _LP64
1167
1168 } else {
1169 ShouldNotReachHere();
1170 }
1171 }
1172
1173
1174 void LIR_Assembler::mem2reg(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool wide, bool /* unaligned */) {
1175 assert(src->is_address(), "should not call otherwise");
1176 assert(dest->is_register(), "should not call otherwise");
1177
1178 LIR_Address* addr = src->as_address_ptr();
1179 Address from_addr = as_Address(addr);
1180
1181 if (addr->base()->type() == T_OBJECT) {
1182 __ verify_oop(addr->base()->as_pointer_register());
1183 }
1184
1185 switch (type) {
1186 case T_BOOLEAN: // fall through
1187 case T_BYTE: // fall through
1188 case T_CHAR: // fall through
1189 case T_SHORT:
1190 if (!VM_Version::is_P6() && !from_addr.uses(dest->as_register())) {
1191 // on pre P6 processors we may get partial register stalls
1192 // so blow away the value of to_rinfo before loading a
1193 // partial word into it. Do it here so that it precedes
1194 // the potential patch point below.
1195 __ xorptr(dest->as_register(), dest->as_register());
1196 }
1197 break;
1198 default:
1199 break;
1200 }
1201
1202 PatchingStub* patch = NULL;
1203 if (patch_code != lir_patch_none) {
1204 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1205 assert(from_addr.disp() != 0, "must have");
1206 }
1207 if (info != NULL) {
1208 add_debug_info_for_null_check_here(info);
1209 }
1210
1211 switch (type) {
1212 case T_FLOAT: {
1213 if (dest->is_single_xmm()) {
1214 __ movflt(dest->as_xmm_float_reg(), from_addr);
1215 } else {
1216 assert(dest->is_single_fpu(), "must be");
1217 assert(dest->fpu_regnr() == 0, "dest must be TOS");
1218 __ fld_s(from_addr);
1219 }
1220 break;
1221 }
1222
1223 case T_DOUBLE: {
1224 if (dest->is_double_xmm()) {
1225 __ movdbl(dest->as_xmm_double_reg(), from_addr);
1226 } else {
1227 assert(dest->is_double_fpu(), "must be");
1228 assert(dest->fpu_regnrLo() == 0, "dest must be TOS");
1229 __ fld_d(from_addr);
1230 }
1231 break;
1232 }
1233
1234 case T_OBJECT: // fall through
1235 case T_ARRAY: // fall through
1236 if (UseCompressedOops && !wide) {
1237 __ movl(dest->as_register(), from_addr);
1238 } else {
1239 __ movptr(dest->as_register(), from_addr);
1240 }
1241 break;
1242
1243 case T_ADDRESS:
1244 if (UseCompressedClassPointers && addr->disp() == oopDesc::klass_offset_in_bytes()) {
1245 __ movl(dest->as_register(), from_addr);
1246 } else {
1247 __ movptr(dest->as_register(), from_addr);
1248 }
1249 break;
1250 case T_INT:
1251 __ movl(dest->as_register(), from_addr);
1252 break;
1253
1254 case T_LONG: {
1255 Register to_lo = dest->as_register_lo();
1256 Register to_hi = dest->as_register_hi();
1257 #ifdef _LP64
1258 __ movptr(to_lo, as_Address_lo(addr));
1259 #else
1260 Register base = addr->base()->as_register();
1261 Register index = noreg;
1262 if (addr->index()->is_register()) {
1263 index = addr->index()->as_register();
1264 }
1265 if ((base == to_lo && index == to_hi) ||
1266 (base == to_hi && index == to_lo)) {
1267 // addresses with 2 registers are only formed as a result of
1268 // array access so this code will never have to deal with
1269 // patches or null checks.
1270 assert(info == NULL && patch == NULL, "must be");
1271 __ lea(to_hi, as_Address(addr));
1272 __ movl(to_lo, Address(to_hi, 0));
1273 __ movl(to_hi, Address(to_hi, BytesPerWord));
1274 } else if (base == to_lo || index == to_lo) {
1275 assert(base != to_hi, "can't be");
1276 assert(index == noreg || (index != base && index != to_hi), "can't handle this");
1277 __ movl(to_hi, as_Address_hi(addr));
1278 if (patch != NULL) {
1279 patching_epilog(patch, lir_patch_high, base, info);
1280 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1281 patch_code = lir_patch_low;
1282 }
1283 __ movl(to_lo, as_Address_lo(addr));
1284 } else {
1285 assert(index == noreg || (index != base && index != to_lo), "can't handle this");
1286 __ movl(to_lo, as_Address_lo(addr));
1287 if (patch != NULL) {
1288 patching_epilog(patch, lir_patch_low, base, info);
1289 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1290 patch_code = lir_patch_high;
1291 }
1292 __ movl(to_hi, as_Address_hi(addr));
1293 }
1294 #endif // _LP64
1295 break;
1296 }
1297
1298 case T_BOOLEAN: // fall through
1299 case T_BYTE: {
1300 Register dest_reg = dest->as_register();
1301 assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6");
1302 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) {
1303 __ movsbl(dest_reg, from_addr);
1304 } else {
1305 __ movb(dest_reg, from_addr);
1306 __ shll(dest_reg, 24);
1307 __ sarl(dest_reg, 24);
1308 }
1309 break;
1310 }
1311
1312 case T_CHAR: {
1313 Register dest_reg = dest->as_register();
1314 assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6");
1315 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) {
1316 __ movzwl(dest_reg, from_addr);
1317 } else {
1318 __ movw(dest_reg, from_addr);
1319 }
1320 break;
1321 }
1322
1323 case T_SHORT: {
1324 Register dest_reg = dest->as_register();
1325 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) {
1326 __ movswl(dest_reg, from_addr);
1327 } else {
1328 __ movw(dest_reg, from_addr);
1329 __ shll(dest_reg, 16);
1330 __ sarl(dest_reg, 16);
1331 }
1332 break;
1333 }
1334
1335 default:
1336 ShouldNotReachHere();
1337 }
1338
1339 if (patch != NULL) {
1340 patching_epilog(patch, patch_code, addr->base()->as_register(), info);
1341 }
1342
1343 if (type == T_ARRAY || type == T_OBJECT) {
1344 #ifdef _LP64
1345 if (UseCompressedOops && !wide) {
1346 __ decode_heap_oop(dest->as_register());
1347 }
1348 #endif
1349
1350 // Load barrier has not yet been applied, so ZGC can't verify the oop here
1351 if (!UseZGC) {
1352 __ verify_oop(dest->as_register());
1353 }
1354 } else if (type == T_ADDRESS && addr->disp() == oopDesc::klass_offset_in_bytes()) {
1355 #ifdef _LP64
1356 if (UseCompressedClassPointers) {
1357 __ decode_klass_not_null(dest->as_register());
1358 }
1359 #endif
1360 }
1361 }
1362
1363
1364 NEEDS_CLEANUP; // This could be static?
1365 Address::ScaleFactor LIR_Assembler::array_element_size(BasicType type) const {
1366 int elem_size = type2aelembytes(type);
1367 switch (elem_size) {
1368 case 1: return Address::times_1;
1369 case 2: return Address::times_2;
1370 case 4: return Address::times_4;
1371 case 8: return Address::times_8;
1372 }
1373 ShouldNotReachHere();
1374 return Address::no_scale;
1375 }
1376
1377
1378 void LIR_Assembler::emit_op3(LIR_Op3* op) {
1379 switch (op->code()) {
1380 case lir_idiv:
1381 case lir_irem:
1382 arithmetic_idiv(op->code(),
1383 op->in_opr1(),
1384 op->in_opr2(),
1385 op->in_opr3(),
1386 op->result_opr(),
1387 op->info());
1388 break;
1389 case lir_fmad:
1390 __ fmad(op->result_opr()->as_xmm_double_reg(),
1391 op->in_opr1()->as_xmm_double_reg(),
1392 op->in_opr2()->as_xmm_double_reg(),
1393 op->in_opr3()->as_xmm_double_reg());
1394 break;
1395 case lir_fmaf:
1396 __ fmaf(op->result_opr()->as_xmm_float_reg(),
1397 op->in_opr1()->as_xmm_float_reg(),
1398 op->in_opr2()->as_xmm_float_reg(),
1399 op->in_opr3()->as_xmm_float_reg());
1400 break;
1401 default: ShouldNotReachHere(); break;
1402 }
1403 }
1404
1405 void LIR_Assembler::emit_opBranch(LIR_OpBranch* op) {
1406 #ifdef ASSERT
1407 assert(op->block() == NULL || op->block()->label() == op->label(), "wrong label");
1408 if (op->block() != NULL) _branch_target_blocks.append(op->block());
1409 if (op->ublock() != NULL) _branch_target_blocks.append(op->ublock());
1410 #endif
1411
1412 if (op->cond() == lir_cond_always) {
1413 if (op->info() != NULL) add_debug_info_for_branch(op->info());
1414 __ jmp (*(op->label()));
1415 } else {
1416 Assembler::Condition acond = Assembler::zero;
1417 if (op->code() == lir_cond_float_branch) {
1418 assert(op->ublock() != NULL, "must have unordered successor");
1419 __ jcc(Assembler::parity, *(op->ublock()->label()));
1420 switch(op->cond()) {
1421 case lir_cond_equal: acond = Assembler::equal; break;
1422 case lir_cond_notEqual: acond = Assembler::notEqual; break;
1423 case lir_cond_less: acond = Assembler::below; break;
1424 case lir_cond_lessEqual: acond = Assembler::belowEqual; break;
1425 case lir_cond_greaterEqual: acond = Assembler::aboveEqual; break;
1426 case lir_cond_greater: acond = Assembler::above; break;
1427 default: ShouldNotReachHere();
1428 }
1429 } else {
1430 switch (op->cond()) {
1431 case lir_cond_equal: acond = Assembler::equal; break;
1432 case lir_cond_notEqual: acond = Assembler::notEqual; break;
1433 case lir_cond_less: acond = Assembler::less; break;
1434 case lir_cond_lessEqual: acond = Assembler::lessEqual; break;
1435 case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break;
1436 case lir_cond_greater: acond = Assembler::greater; break;
1437 case lir_cond_belowEqual: acond = Assembler::belowEqual; break;
1438 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; break;
1439 default: ShouldNotReachHere();
1440 }
1441 }
1442 __ jcc(acond,*(op->label()));
1443 }
1444 }
1445
1446 void LIR_Assembler::emit_opConvert(LIR_OpConvert* op) {
1447 LIR_Opr src = op->in_opr();
1448 LIR_Opr dest = op->result_opr();
1449
1450 switch (op->bytecode()) {
1451 case Bytecodes::_i2l:
1452 #ifdef _LP64
1453 __ movl2ptr(dest->as_register_lo(), src->as_register());
1454 #else
1455 move_regs(src->as_register(), dest->as_register_lo());
1456 move_regs(src->as_register(), dest->as_register_hi());
1457 __ sarl(dest->as_register_hi(), 31);
1458 #endif // LP64
1459 break;
1460
1461 case Bytecodes::_l2i:
1462 #ifdef _LP64
1463 __ movl(dest->as_register(), src->as_register_lo());
1464 #else
1465 move_regs(src->as_register_lo(), dest->as_register());
1466 #endif
1467 break;
1468
1469 case Bytecodes::_i2b:
1470 move_regs(src->as_register(), dest->as_register());
1471 __ sign_extend_byte(dest->as_register());
1472 break;
1473
1474 case Bytecodes::_i2c:
1475 move_regs(src->as_register(), dest->as_register());
1476 __ andl(dest->as_register(), 0xFFFF);
1477 break;
1478
1479 case Bytecodes::_i2s:
1480 move_regs(src->as_register(), dest->as_register());
1481 __ sign_extend_short(dest->as_register());
1482 break;
1483
1484
1485 case Bytecodes::_f2d:
1486 case Bytecodes::_d2f:
1487 if (dest->is_single_xmm()) {
1488 __ cvtsd2ss(dest->as_xmm_float_reg(), src->as_xmm_double_reg());
1489 } else if (dest->is_double_xmm()) {
1490 __ cvtss2sd(dest->as_xmm_double_reg(), src->as_xmm_float_reg());
1491 } else {
1492 assert(src->fpu() == dest->fpu(), "register must be equal");
1493 // do nothing (float result is rounded later through spilling)
1494 }
1495 break;
1496
1497 case Bytecodes::_i2f:
1498 case Bytecodes::_i2d:
1499 if (dest->is_single_xmm()) {
1500 __ cvtsi2ssl(dest->as_xmm_float_reg(), src->as_register());
1501 } else if (dest->is_double_xmm()) {
1502 __ cvtsi2sdl(dest->as_xmm_double_reg(), src->as_register());
1503 } else {
1504 assert(dest->fpu() == 0, "result must be on TOS");
1505 __ movl(Address(rsp, 0), src->as_register());
1506 __ fild_s(Address(rsp, 0));
1507 }
1508 break;
1509
1510 case Bytecodes::_f2i:
1511 case Bytecodes::_d2i:
1512 if (src->is_single_xmm()) {
1513 __ cvttss2sil(dest->as_register(), src->as_xmm_float_reg());
1514 } else if (src->is_double_xmm()) {
1515 __ cvttsd2sil(dest->as_register(), src->as_xmm_double_reg());
1516 } else {
1517 assert(src->fpu() == 0, "input must be on TOS");
1518 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_trunc()));
1519 __ fist_s(Address(rsp, 0));
1520 __ movl(dest->as_register(), Address(rsp, 0));
1521 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
1522 }
1523
1524 // IA32 conversion instructions do not match JLS for overflow, underflow and NaN -> fixup in stub
1525 assert(op->stub() != NULL, "stub required");
1526 __ cmpl(dest->as_register(), 0x80000000);
1527 __ jcc(Assembler::equal, *op->stub()->entry());
1528 __ bind(*op->stub()->continuation());
1529 break;
1530
1531 case Bytecodes::_l2f:
1532 case Bytecodes::_l2d:
1533 assert(!dest->is_xmm_register(), "result in xmm register not supported (no SSE instruction present)");
1534 assert(dest->fpu() == 0, "result must be on TOS");
1535
1536 __ movptr(Address(rsp, 0), src->as_register_lo());
1537 NOT_LP64(__ movl(Address(rsp, BytesPerWord), src->as_register_hi()));
1538 __ fild_d(Address(rsp, 0));
1539 // float result is rounded later through spilling
1540 break;
1541
1542 case Bytecodes::_f2l:
1543 case Bytecodes::_d2l:
1544 assert(!src->is_xmm_register(), "input in xmm register not supported (no SSE instruction present)");
1545 assert(src->fpu() == 0, "input must be on TOS");
1546 assert(dest == FrameMap::long0_opr, "runtime stub places result in these registers");
1547
1548 // instruction sequence too long to inline it here
1549 {
1550 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::fpu2long_stub_id)));
1551 }
1552 break;
1553
1554 default: ShouldNotReachHere();
1555 }
1556 }
1557
1558 void LIR_Assembler::emit_alloc_obj(LIR_OpAllocObj* op) {
1559 if (op->init_check()) {
1560 add_debug_info_for_null_check_here(op->stub()->info());
1561 __ cmpb(Address(op->klass()->as_register(),
1562 InstanceKlass::init_state_offset()),
1563 InstanceKlass::fully_initialized);
1564 __ jcc(Assembler::notEqual, *op->stub()->entry());
1565 }
1566 __ allocate_object(op->obj()->as_register(),
1567 op->tmp1()->as_register(),
1568 op->tmp2()->as_register(),
1569 op->header_size(),
1570 op->object_size(),
1571 op->klass()->as_register(),
1572 *op->stub()->entry());
1573 __ bind(*op->stub()->continuation());
1574 }
1575
1576 void LIR_Assembler::emit_alloc_array(LIR_OpAllocArray* op) {
1577 Register len = op->len()->as_register();
1578 LP64_ONLY( __ movslq(len, len); )
1579
1580 if (UseSlowPath ||
1581 (!UseFastNewObjectArray && (op->type() == T_OBJECT || op->type() == T_ARRAY)) ||
1582 (!UseFastNewTypeArray && (op->type() != T_OBJECT && op->type() != T_ARRAY))) {
1583 __ jmp(*op->stub()->entry());
1584 } else {
1585 Register tmp1 = op->tmp1()->as_register();
1586 Register tmp2 = op->tmp2()->as_register();
1587 Register tmp3 = op->tmp3()->as_register();
1588 if (len == tmp1) {
1589 tmp1 = tmp3;
1590 } else if (len == tmp2) {
1591 tmp2 = tmp3;
1592 } else if (len == tmp3) {
1593 // everything is ok
1594 } else {
1595 __ mov(tmp3, len);
1596 }
1597 __ allocate_array(op->obj()->as_register(),
1598 len,
1599 tmp1,
1600 tmp2,
1601 arrayOopDesc::header_size(op->type()),
1602 array_element_size(op->type()),
1603 op->klass()->as_register(),
1604 *op->stub()->entry());
1605 }
1606 __ bind(*op->stub()->continuation());
1607 }
1608
1609 void LIR_Assembler::type_profile_helper(Register mdo,
1610 ciMethodData *md, ciProfileData *data,
1611 Register recv, Label* update_done) {
1612 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) {
1613 Label next_test;
1614 // See if the receiver is receiver[n].
1615 __ cmpptr(recv, Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i))));
1616 __ jccb(Assembler::notEqual, next_test);
1617 Address data_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i)));
1618 __ addptr(data_addr, DataLayout::counter_increment);
1619 __ jmp(*update_done);
1620 __ bind(next_test);
1621 }
1622
1623 // Didn't find receiver; find next empty slot and fill it in
1624 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) {
1625 Label next_test;
1626 Address recv_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i)));
1627 __ cmpptr(recv_addr, (intptr_t)NULL_WORD);
1628 __ jccb(Assembler::notEqual, next_test);
1629 __ movptr(recv_addr, recv);
1630 __ movptr(Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i))), DataLayout::counter_increment);
1631 __ jmp(*update_done);
1632 __ bind(next_test);
1633 }
1634 }
1635
1636 void LIR_Assembler::emit_typecheck_helper(LIR_OpTypeCheck *op, Label* success, Label* failure, Label* obj_is_null) {
1637 // we always need a stub for the failure case.
1638 CodeStub* stub = op->stub();
1639 Register obj = op->object()->as_register();
1640 Register k_RInfo = op->tmp1()->as_register();
1641 Register klass_RInfo = op->tmp2()->as_register();
1642 Register dst = op->result_opr()->as_register();
1643 ciKlass* k = op->klass();
1644 Register Rtmp1 = noreg;
1645
1646 // check if it needs to be profiled
1647 ciMethodData* md = NULL;
1648 ciProfileData* data = NULL;
1649
1650 if (op->should_profile()) {
1651 ciMethod* method = op->profiled_method();
1652 assert(method != NULL, "Should have method");
1653 int bci = op->profiled_bci();
1654 md = method->method_data_or_null();
1655 assert(md != NULL, "Sanity");
1656 data = md->bci_to_data(bci);
1657 assert(data != NULL, "need data for type check");
1658 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check");
1659 }
1660 Label profile_cast_success, profile_cast_failure;
1661 Label *success_target = op->should_profile() ? &profile_cast_success : success;
1662 Label *failure_target = op->should_profile() ? &profile_cast_failure : failure;
1663
1664 if (obj == k_RInfo) {
1665 k_RInfo = dst;
1666 } else if (obj == klass_RInfo) {
1667 klass_RInfo = dst;
1668 }
1669 if (k->is_loaded() && !UseCompressedClassPointers) {
1670 select_different_registers(obj, dst, k_RInfo, klass_RInfo);
1671 } else {
1672 Rtmp1 = op->tmp3()->as_register();
1673 select_different_registers(obj, dst, k_RInfo, klass_RInfo, Rtmp1);
1674 }
1675
1676 assert_different_registers(obj, k_RInfo, klass_RInfo);
1677
1678 __ cmpptr(obj, (int32_t)NULL_WORD);
1679 if (op->should_profile()) {
1680 Label not_null;
1681 __ jccb(Assembler::notEqual, not_null);
1682 // Object is null; update MDO and exit
1683 Register mdo = klass_RInfo;
1684 __ mov_metadata(mdo, md->constant_encoding());
1685 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::header_offset()));
1686 int header_bits = DataLayout::flag_mask_to_header_mask(BitData::null_seen_byte_constant());
1687 __ orl(data_addr, header_bits);
1688 __ jmp(*obj_is_null);
1689 __ bind(not_null);
1690 } else {
1691 __ jcc(Assembler::equal, *obj_is_null);
1692 }
1693
1694 if (!k->is_loaded()) {
1695 klass2reg_with_patching(k_RInfo, op->info_for_patch());
1696 } else {
1697 #ifdef _LP64
1698 __ mov_metadata(k_RInfo, k->constant_encoding());
1699 #endif // _LP64
1700 }
1701 __ verify_oop(obj);
1702
1703 if (op->fast_check()) {
1704 // get object class
1705 // not a safepoint as obj null check happens earlier
1706 #ifdef _LP64
1707 if (UseCompressedClassPointers) {
1708 __ load_klass(Rtmp1, obj);
1709 __ cmpptr(k_RInfo, Rtmp1);
1710 } else {
1711 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes()));
1712 }
1713 #else
1714 if (k->is_loaded()) {
1715 __ cmpklass(Address(obj, oopDesc::klass_offset_in_bytes()), k->constant_encoding());
1716 } else {
1717 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes()));
1718 }
1719 #endif
1720 __ jcc(Assembler::notEqual, *failure_target);
1721 // successful cast, fall through to profile or jump
1722 } else {
1723 // get object class
1724 // not a safepoint as obj null check happens earlier
1725 __ load_klass(klass_RInfo, obj);
1726 if (k->is_loaded()) {
1727 // See if we get an immediate positive hit
1728 #ifdef _LP64
1729 __ cmpptr(k_RInfo, Address(klass_RInfo, k->super_check_offset()));
1730 #else
1731 __ cmpklass(Address(klass_RInfo, k->super_check_offset()), k->constant_encoding());
1732 #endif // _LP64
1733 if ((juint)in_bytes(Klass::secondary_super_cache_offset()) != k->super_check_offset()) {
1734 __ jcc(Assembler::notEqual, *failure_target);
1735 // successful cast, fall through to profile or jump
1736 } else {
1737 // See if we get an immediate positive hit
1738 __ jcc(Assembler::equal, *success_target);
1739 // check for self
1740 #ifdef _LP64
1741 __ cmpptr(klass_RInfo, k_RInfo);
1742 #else
1743 __ cmpklass(klass_RInfo, k->constant_encoding());
1744 #endif // _LP64
1745 __ jcc(Assembler::equal, *success_target);
1746
1747 __ push(klass_RInfo);
1748 #ifdef _LP64
1749 __ push(k_RInfo);
1750 #else
1751 __ pushklass(k->constant_encoding());
1752 #endif // _LP64
1753 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
1754 __ pop(klass_RInfo);
1755 __ pop(klass_RInfo);
1756 // result is a boolean
1757 __ cmpl(klass_RInfo, 0);
1758 __ jcc(Assembler::equal, *failure_target);
1759 // successful cast, fall through to profile or jump
1760 }
1761 } else {
1762 // perform the fast part of the checking logic
1763 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL);
1764 // call out-of-line instance of __ check_klass_subtype_slow_path(...):
1765 __ push(klass_RInfo);
1766 __ push(k_RInfo);
1767 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
1768 __ pop(klass_RInfo);
1769 __ pop(k_RInfo);
1770 // result is a boolean
1771 __ cmpl(k_RInfo, 0);
1772 __ jcc(Assembler::equal, *failure_target);
1773 // successful cast, fall through to profile or jump
1774 }
1775 }
1776 if (op->should_profile()) {
1777 Register mdo = klass_RInfo, recv = k_RInfo;
1778 __ bind(profile_cast_success);
1779 __ mov_metadata(mdo, md->constant_encoding());
1780 __ load_klass(recv, obj);
1781 Label update_done;
1782 type_profile_helper(mdo, md, data, recv, success);
1783 __ jmp(*success);
1784
1785 __ bind(profile_cast_failure);
1786 __ mov_metadata(mdo, md->constant_encoding());
1787 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
1788 __ subptr(counter_addr, DataLayout::counter_increment);
1789 __ jmp(*failure);
1790 }
1791 __ jmp(*success);
1792 }
1793
1794
1795 void LIR_Assembler::emit_opTypeCheck(LIR_OpTypeCheck* op) {
1796 LIR_Code code = op->code();
1797 if (code == lir_store_check) {
1798 Register value = op->object()->as_register();
1799 Register array = op->array()->as_register();
1800 Register k_RInfo = op->tmp1()->as_register();
1801 Register klass_RInfo = op->tmp2()->as_register();
1802 Register Rtmp1 = op->tmp3()->as_register();
1803
1804 CodeStub* stub = op->stub();
1805
1806 // check if it needs to be profiled
1807 ciMethodData* md = NULL;
1808 ciProfileData* data = NULL;
1809
1810 if (op->should_profile()) {
1811 ciMethod* method = op->profiled_method();
1812 assert(method != NULL, "Should have method");
1813 int bci = op->profiled_bci();
1814 md = method->method_data_or_null();
1815 assert(md != NULL, "Sanity");
1816 data = md->bci_to_data(bci);
1817 assert(data != NULL, "need data for type check");
1818 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check");
1819 }
1820 Label profile_cast_success, profile_cast_failure, done;
1821 Label *success_target = op->should_profile() ? &profile_cast_success : &done;
1822 Label *failure_target = op->should_profile() ? &profile_cast_failure : stub->entry();
1823
1824 __ cmpptr(value, (int32_t)NULL_WORD);
1825 if (op->should_profile()) {
1826 Label not_null;
1827 __ jccb(Assembler::notEqual, not_null);
1828 // Object is null; update MDO and exit
1829 Register mdo = klass_RInfo;
1830 __ mov_metadata(mdo, md->constant_encoding());
1831 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::header_offset()));
1832 int header_bits = DataLayout::flag_mask_to_header_mask(BitData::null_seen_byte_constant());
1833 __ orl(data_addr, header_bits);
1834 __ jmp(done);
1835 __ bind(not_null);
1836 } else {
1837 __ jcc(Assembler::equal, done);
1838 }
1839
1840 add_debug_info_for_null_check_here(op->info_for_exception());
1841 __ load_klass(k_RInfo, array);
1842 __ load_klass(klass_RInfo, value);
1843
1844 // get instance klass (it's already uncompressed)
1845 __ movptr(k_RInfo, Address(k_RInfo, ObjArrayKlass::element_klass_offset()));
1846 // perform the fast part of the checking logic
1847 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL);
1848 // call out-of-line instance of __ check_klass_subtype_slow_path(...):
1849 __ push(klass_RInfo);
1850 __ push(k_RInfo);
1851 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
1852 __ pop(klass_RInfo);
1853 __ pop(k_RInfo);
1854 // result is a boolean
1855 __ cmpl(k_RInfo, 0);
1856 __ jcc(Assembler::equal, *failure_target);
1857 // fall through to the success case
1858
1859 if (op->should_profile()) {
1860 Register mdo = klass_RInfo, recv = k_RInfo;
1861 __ bind(profile_cast_success);
1862 __ mov_metadata(mdo, md->constant_encoding());
1863 __ load_klass(recv, value);
1864 Label update_done;
1865 type_profile_helper(mdo, md, data, recv, &done);
1866 __ jmpb(done);
1867
1868 __ bind(profile_cast_failure);
1869 __ mov_metadata(mdo, md->constant_encoding());
1870 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
1871 __ subptr(counter_addr, DataLayout::counter_increment);
1872 __ jmp(*stub->entry());
1873 }
1874
1875 __ bind(done);
1876 } else
1877 if (code == lir_checkcast) {
1878 Register obj = op->object()->as_register();
1879 Register dst = op->result_opr()->as_register();
1880 Label success;
1881 emit_typecheck_helper(op, &success, op->stub()->entry(), &success);
1882 __ bind(success);
1883 if (dst != obj) {
1884 __ mov(dst, obj);
1885 }
1886 } else
1887 if (code == lir_instanceof) {
1888 Register obj = op->object()->as_register();
1889 Register dst = op->result_opr()->as_register();
1890 Label success, failure, done;
1891 emit_typecheck_helper(op, &success, &failure, &failure);
1892 __ bind(failure);
1893 __ xorptr(dst, dst);
1894 __ jmpb(done);
1895 __ bind(success);
1896 __ movptr(dst, 1);
1897 __ bind(done);
1898 } else {
1899 ShouldNotReachHere();
1900 }
1901
1902 }
1903
1904
1905 void LIR_Assembler::emit_compare_and_swap(LIR_OpCompareAndSwap* op) {
1906 if (LP64_ONLY(false &&) op->code() == lir_cas_long && VM_Version::supports_cx8()) {
1907 assert(op->cmp_value()->as_register_lo() == rax, "wrong register");
1908 assert(op->cmp_value()->as_register_hi() == rdx, "wrong register");
1909 assert(op->new_value()->as_register_lo() == rbx, "wrong register");
1910 assert(op->new_value()->as_register_hi() == rcx, "wrong register");
1911 Register addr = op->addr()->as_register();
1912 if (os::is_MP()) {
1913 __ lock();
1914 }
1915 NOT_LP64(__ cmpxchg8(Address(addr, 0)));
1916
1917 } else if (op->code() == lir_cas_int || op->code() == lir_cas_obj ) {
1918 NOT_LP64(assert(op->addr()->is_single_cpu(), "must be single");)
1919 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo());
1920 Register newval = op->new_value()->as_register();
1921 Register cmpval = op->cmp_value()->as_register();
1922 assert(cmpval == rax, "wrong register");
1923 assert(newval != NULL, "new val must be register");
1924 assert(cmpval != newval, "cmp and new values must be in different registers");
1925 assert(cmpval != addr, "cmp and addr must be in different registers");
1926 assert(newval != addr, "new value and addr must be in different registers");
1927
1928 if ( op->code() == lir_cas_obj) {
1929 #ifdef _LP64
1930 if (UseCompressedOops) {
1931 __ encode_heap_oop(cmpval);
1932 __ mov(rscratch1, newval);
1933 __ encode_heap_oop(rscratch1);
1934 if (os::is_MP()) {
1935 __ lock();
1936 }
1937 // cmpval (rax) is implicitly used by this instruction
1938 __ cmpxchgl(rscratch1, Address(addr, 0));
1939 } else
1940 #endif
1941 {
1942 if (os::is_MP()) {
1943 __ lock();
1944 }
1945 __ cmpxchgptr(newval, Address(addr, 0));
1946 }
1947 } else {
1948 assert(op->code() == lir_cas_int, "lir_cas_int expected");
1949 if (os::is_MP()) {
1950 __ lock();
1951 }
1952 __ cmpxchgl(newval, Address(addr, 0));
1953 }
1954 #ifdef _LP64
1955 } else if (op->code() == lir_cas_long) {
1956 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo());
1957 Register newval = op->new_value()->as_register_lo();
1958 Register cmpval = op->cmp_value()->as_register_lo();
1959 assert(cmpval == rax, "wrong register");
1960 assert(newval != NULL, "new val must be register");
1961 assert(cmpval != newval, "cmp and new values must be in different registers");
1962 assert(cmpval != addr, "cmp and addr must be in different registers");
1963 assert(newval != addr, "new value and addr must be in different registers");
1964 if (os::is_MP()) {
1965 __ lock();
1966 }
1967 __ cmpxchgq(newval, Address(addr, 0));
1968 #endif // _LP64
1969 } else {
1970 Unimplemented();
1971 }
1972 }
1973
1974 void LIR_Assembler::cmove(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result, BasicType type) {
1975 Assembler::Condition acond, ncond;
1976 switch (condition) {
1977 case lir_cond_equal: acond = Assembler::equal; ncond = Assembler::notEqual; break;
1978 case lir_cond_notEqual: acond = Assembler::notEqual; ncond = Assembler::equal; break;
1979 case lir_cond_less: acond = Assembler::less; ncond = Assembler::greaterEqual; break;
1980 case lir_cond_lessEqual: acond = Assembler::lessEqual; ncond = Assembler::greater; break;
1981 case lir_cond_greaterEqual: acond = Assembler::greaterEqual; ncond = Assembler::less; break;
1982 case lir_cond_greater: acond = Assembler::greater; ncond = Assembler::lessEqual; break;
1983 case lir_cond_belowEqual: acond = Assembler::belowEqual; ncond = Assembler::above; break;
1984 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; ncond = Assembler::below; break;
1985 default: acond = Assembler::equal; ncond = Assembler::notEqual;
1986 ShouldNotReachHere();
1987 }
1988
1989 if (opr1->is_cpu_register()) {
1990 reg2reg(opr1, result);
1991 } else if (opr1->is_stack()) {
1992 stack2reg(opr1, result, result->type());
1993 } else if (opr1->is_constant()) {
1994 const2reg(opr1, result, lir_patch_none, NULL);
1995 } else {
1996 ShouldNotReachHere();
1997 }
1998
1999 if (VM_Version::supports_cmov() && !opr2->is_constant()) {
2000 // optimized version that does not require a branch
2001 if (opr2->is_single_cpu()) {
2002 assert(opr2->cpu_regnr() != result->cpu_regnr(), "opr2 already overwritten by previous move");
2003 __ cmov(ncond, result->as_register(), opr2->as_register());
2004 } else if (opr2->is_double_cpu()) {
2005 assert(opr2->cpu_regnrLo() != result->cpu_regnrLo() && opr2->cpu_regnrLo() != result->cpu_regnrHi(), "opr2 already overwritten by previous move");
2006 assert(opr2->cpu_regnrHi() != result->cpu_regnrLo() && opr2->cpu_regnrHi() != result->cpu_regnrHi(), "opr2 already overwritten by previous move");
2007 __ cmovptr(ncond, result->as_register_lo(), opr2->as_register_lo());
2008 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), opr2->as_register_hi());)
2009 } else if (opr2->is_single_stack()) {
2010 __ cmovl(ncond, result->as_register(), frame_map()->address_for_slot(opr2->single_stack_ix()));
2011 } else if (opr2->is_double_stack()) {
2012 __ cmovptr(ncond, result->as_register_lo(), frame_map()->address_for_slot(opr2->double_stack_ix(), lo_word_offset_in_bytes));
2013 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), frame_map()->address_for_slot(opr2->double_stack_ix(), hi_word_offset_in_bytes));)
2014 } else {
2015 ShouldNotReachHere();
2016 }
2017
2018 } else {
2019 Label skip;
2020 __ jcc (acond, skip);
2021 if (opr2->is_cpu_register()) {
2022 reg2reg(opr2, result);
2023 } else if (opr2->is_stack()) {
2024 stack2reg(opr2, result, result->type());
2025 } else if (opr2->is_constant()) {
2026 const2reg(opr2, result, lir_patch_none, NULL);
2027 } else {
2028 ShouldNotReachHere();
2029 }
2030 __ bind(skip);
2031 }
2032 }
2033
2034
2035 void LIR_Assembler::arith_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dest, CodeEmitInfo* info, bool pop_fpu_stack) {
2036 assert(info == NULL, "should never be used, idiv/irem and ldiv/lrem not handled by this method");
2037
2038 if (left->is_single_cpu()) {
2039 assert(left == dest, "left and dest must be equal");
2040 Register lreg = left->as_register();
2041
2042 if (right->is_single_cpu()) {
2043 // cpu register - cpu register
2044 Register rreg = right->as_register();
2045 switch (code) {
2046 case lir_add: __ addl (lreg, rreg); break;
2047 case lir_sub: __ subl (lreg, rreg); break;
2048 case lir_mul: __ imull(lreg, rreg); break;
2049 default: ShouldNotReachHere();
2050 }
2051
2052 } else if (right->is_stack()) {
2053 // cpu register - stack
2054 Address raddr = frame_map()->address_for_slot(right->single_stack_ix());
2055 switch (code) {
2056 case lir_add: __ addl(lreg, raddr); break;
2057 case lir_sub: __ subl(lreg, raddr); break;
2058 default: ShouldNotReachHere();
2059 }
2060
2061 } else if (right->is_constant()) {
2062 // cpu register - constant
2063 jint c = right->as_constant_ptr()->as_jint();
2064 switch (code) {
2065 case lir_add: {
2066 __ incrementl(lreg, c);
2067 break;
2068 }
2069 case lir_sub: {
2070 __ decrementl(lreg, c);
2071 break;
2072 }
2073 default: ShouldNotReachHere();
2074 }
2075
2076 } else {
2077 ShouldNotReachHere();
2078 }
2079
2080 } else if (left->is_double_cpu()) {
2081 assert(left == dest, "left and dest must be equal");
2082 Register lreg_lo = left->as_register_lo();
2083 Register lreg_hi = left->as_register_hi();
2084
2085 if (right->is_double_cpu()) {
2086 // cpu register - cpu register
2087 Register rreg_lo = right->as_register_lo();
2088 Register rreg_hi = right->as_register_hi();
2089 NOT_LP64(assert_different_registers(lreg_lo, lreg_hi, rreg_lo, rreg_hi));
2090 LP64_ONLY(assert_different_registers(lreg_lo, rreg_lo));
2091 switch (code) {
2092 case lir_add:
2093 __ addptr(lreg_lo, rreg_lo);
2094 NOT_LP64(__ adcl(lreg_hi, rreg_hi));
2095 break;
2096 case lir_sub:
2097 __ subptr(lreg_lo, rreg_lo);
2098 NOT_LP64(__ sbbl(lreg_hi, rreg_hi));
2099 break;
2100 case lir_mul:
2101 #ifdef _LP64
2102 __ imulq(lreg_lo, rreg_lo);
2103 #else
2104 assert(lreg_lo == rax && lreg_hi == rdx, "must be");
2105 __ imull(lreg_hi, rreg_lo);
2106 __ imull(rreg_hi, lreg_lo);
2107 __ addl (rreg_hi, lreg_hi);
2108 __ mull (rreg_lo);
2109 __ addl (lreg_hi, rreg_hi);
2110 #endif // _LP64
2111 break;
2112 default:
2113 ShouldNotReachHere();
2114 }
2115
2116 } else if (right->is_constant()) {
2117 // cpu register - constant
2118 #ifdef _LP64
2119 jlong c = right->as_constant_ptr()->as_jlong_bits();
2120 __ movptr(r10, (intptr_t) c);
2121 switch (code) {
2122 case lir_add:
2123 __ addptr(lreg_lo, r10);
2124 break;
2125 case lir_sub:
2126 __ subptr(lreg_lo, r10);
2127 break;
2128 default:
2129 ShouldNotReachHere();
2130 }
2131 #else
2132 jint c_lo = right->as_constant_ptr()->as_jint_lo();
2133 jint c_hi = right->as_constant_ptr()->as_jint_hi();
2134 switch (code) {
2135 case lir_add:
2136 __ addptr(lreg_lo, c_lo);
2137 __ adcl(lreg_hi, c_hi);
2138 break;
2139 case lir_sub:
2140 __ subptr(lreg_lo, c_lo);
2141 __ sbbl(lreg_hi, c_hi);
2142 break;
2143 default:
2144 ShouldNotReachHere();
2145 }
2146 #endif // _LP64
2147
2148 } else {
2149 ShouldNotReachHere();
2150 }
2151
2152 } else if (left->is_single_xmm()) {
2153 assert(left == dest, "left and dest must be equal");
2154 XMMRegister lreg = left->as_xmm_float_reg();
2155
2156 if (right->is_single_xmm()) {
2157 XMMRegister rreg = right->as_xmm_float_reg();
2158 switch (code) {
2159 case lir_add: __ addss(lreg, rreg); break;
2160 case lir_sub: __ subss(lreg, rreg); break;
2161 case lir_mul_strictfp: // fall through
2162 case lir_mul: __ mulss(lreg, rreg); break;
2163 case lir_div_strictfp: // fall through
2164 case lir_div: __ divss(lreg, rreg); break;
2165 default: ShouldNotReachHere();
2166 }
2167 } else {
2168 Address raddr;
2169 if (right->is_single_stack()) {
2170 raddr = frame_map()->address_for_slot(right->single_stack_ix());
2171 } else if (right->is_constant()) {
2172 // hack for now
2173 raddr = __ as_Address(InternalAddress(float_constant(right->as_jfloat())));
2174 } else {
2175 ShouldNotReachHere();
2176 }
2177 switch (code) {
2178 case lir_add: __ addss(lreg, raddr); break;
2179 case lir_sub: __ subss(lreg, raddr); break;
2180 case lir_mul_strictfp: // fall through
2181 case lir_mul: __ mulss(lreg, raddr); break;
2182 case lir_div_strictfp: // fall through
2183 case lir_div: __ divss(lreg, raddr); break;
2184 default: ShouldNotReachHere();
2185 }
2186 }
2187
2188 } else if (left->is_double_xmm()) {
2189 assert(left == dest, "left and dest must be equal");
2190
2191 XMMRegister lreg = left->as_xmm_double_reg();
2192 if (right->is_double_xmm()) {
2193 XMMRegister rreg = right->as_xmm_double_reg();
2194 switch (code) {
2195 case lir_add: __ addsd(lreg, rreg); break;
2196 case lir_sub: __ subsd(lreg, rreg); break;
2197 case lir_mul_strictfp: // fall through
2198 case lir_mul: __ mulsd(lreg, rreg); break;
2199 case lir_div_strictfp: // fall through
2200 case lir_div: __ divsd(lreg, rreg); break;
2201 default: ShouldNotReachHere();
2202 }
2203 } else {
2204 Address raddr;
2205 if (right->is_double_stack()) {
2206 raddr = frame_map()->address_for_slot(right->double_stack_ix());
2207 } else if (right->is_constant()) {
2208 // hack for now
2209 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble())));
2210 } else {
2211 ShouldNotReachHere();
2212 }
2213 switch (code) {
2214 case lir_add: __ addsd(lreg, raddr); break;
2215 case lir_sub: __ subsd(lreg, raddr); break;
2216 case lir_mul_strictfp: // fall through
2217 case lir_mul: __ mulsd(lreg, raddr); break;
2218 case lir_div_strictfp: // fall through
2219 case lir_div: __ divsd(lreg, raddr); break;
2220 default: ShouldNotReachHere();
2221 }
2222 }
2223
2224 } else if (left->is_single_fpu()) {
2225 assert(dest->is_single_fpu(), "fpu stack allocation required");
2226
2227 if (right->is_single_fpu()) {
2228 arith_fpu_implementation(code, left->fpu_regnr(), right->fpu_regnr(), dest->fpu_regnr(), pop_fpu_stack);
2229
2230 } else {
2231 assert(left->fpu_regnr() == 0, "left must be on TOS");
2232 assert(dest->fpu_regnr() == 0, "dest must be on TOS");
2233
2234 Address raddr;
2235 if (right->is_single_stack()) {
2236 raddr = frame_map()->address_for_slot(right->single_stack_ix());
2237 } else if (right->is_constant()) {
2238 address const_addr = float_constant(right->as_jfloat());
2239 assert(const_addr != NULL, "incorrect float/double constant maintainance");
2240 // hack for now
2241 raddr = __ as_Address(InternalAddress(const_addr));
2242 } else {
2243 ShouldNotReachHere();
2244 }
2245
2246 switch (code) {
2247 case lir_add: __ fadd_s(raddr); break;
2248 case lir_sub: __ fsub_s(raddr); break;
2249 case lir_mul_strictfp: // fall through
2250 case lir_mul: __ fmul_s(raddr); break;
2251 case lir_div_strictfp: // fall through
2252 case lir_div: __ fdiv_s(raddr); break;
2253 default: ShouldNotReachHere();
2254 }
2255 }
2256
2257 } else if (left->is_double_fpu()) {
2258 assert(dest->is_double_fpu(), "fpu stack allocation required");
2259
2260 if (code == lir_mul_strictfp || code == lir_div_strictfp) {
2261 // Double values require special handling for strictfp mul/div on x86
2262 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1()));
2263 __ fmulp(left->fpu_regnrLo() + 1);
2264 }
2265
2266 if (right->is_double_fpu()) {
2267 arith_fpu_implementation(code, left->fpu_regnrLo(), right->fpu_regnrLo(), dest->fpu_regnrLo(), pop_fpu_stack);
2268
2269 } else {
2270 assert(left->fpu_regnrLo() == 0, "left must be on TOS");
2271 assert(dest->fpu_regnrLo() == 0, "dest must be on TOS");
2272
2273 Address raddr;
2274 if (right->is_double_stack()) {
2275 raddr = frame_map()->address_for_slot(right->double_stack_ix());
2276 } else if (right->is_constant()) {
2277 // hack for now
2278 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble())));
2279 } else {
2280 ShouldNotReachHere();
2281 }
2282
2283 switch (code) {
2284 case lir_add: __ fadd_d(raddr); break;
2285 case lir_sub: __ fsub_d(raddr); break;
2286 case lir_mul_strictfp: // fall through
2287 case lir_mul: __ fmul_d(raddr); break;
2288 case lir_div_strictfp: // fall through
2289 case lir_div: __ fdiv_d(raddr); break;
2290 default: ShouldNotReachHere();
2291 }
2292 }
2293
2294 if (code == lir_mul_strictfp || code == lir_div_strictfp) {
2295 // Double values require special handling for strictfp mul/div on x86
2296 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2()));
2297 __ fmulp(dest->fpu_regnrLo() + 1);
2298 }
2299
2300 } else if (left->is_single_stack() || left->is_address()) {
2301 assert(left == dest, "left and dest must be equal");
2302
2303 Address laddr;
2304 if (left->is_single_stack()) {
2305 laddr = frame_map()->address_for_slot(left->single_stack_ix());
2306 } else if (left->is_address()) {
2307 laddr = as_Address(left->as_address_ptr());
2308 } else {
2309 ShouldNotReachHere();
2310 }
2311
2312 if (right->is_single_cpu()) {
2313 Register rreg = right->as_register();
2314 switch (code) {
2315 case lir_add: __ addl(laddr, rreg); break;
2316 case lir_sub: __ subl(laddr, rreg); break;
2317 default: ShouldNotReachHere();
2318 }
2319 } else if (right->is_constant()) {
2320 jint c = right->as_constant_ptr()->as_jint();
2321 switch (code) {
2322 case lir_add: {
2323 __ incrementl(laddr, c);
2324 break;
2325 }
2326 case lir_sub: {
2327 __ decrementl(laddr, c);
2328 break;
2329 }
2330 default: ShouldNotReachHere();
2331 }
2332 } else {
2333 ShouldNotReachHere();
2334 }
2335
2336 } else {
2337 ShouldNotReachHere();
2338 }
2339 }
2340
2341 void LIR_Assembler::arith_fpu_implementation(LIR_Code code, int left_index, int right_index, int dest_index, bool pop_fpu_stack) {
2342 assert(pop_fpu_stack || (left_index == dest_index || right_index == dest_index), "invalid LIR");
2343 assert(!pop_fpu_stack || (left_index - 1 == dest_index || right_index - 1 == dest_index), "invalid LIR");
2344 assert(left_index == 0 || right_index == 0, "either must be on top of stack");
2345
2346 bool left_is_tos = (left_index == 0);
2347 bool dest_is_tos = (dest_index == 0);
2348 int non_tos_index = (left_is_tos ? right_index : left_index);
2349
2350 switch (code) {
2351 case lir_add:
2352 if (pop_fpu_stack) __ faddp(non_tos_index);
2353 else if (dest_is_tos) __ fadd (non_tos_index);
2354 else __ fadda(non_tos_index);
2355 break;
2356
2357 case lir_sub:
2358 if (left_is_tos) {
2359 if (pop_fpu_stack) __ fsubrp(non_tos_index);
2360 else if (dest_is_tos) __ fsub (non_tos_index);
2361 else __ fsubra(non_tos_index);
2362 } else {
2363 if (pop_fpu_stack) __ fsubp (non_tos_index);
2364 else if (dest_is_tos) __ fsubr (non_tos_index);
2365 else __ fsuba (non_tos_index);
2366 }
2367 break;
2368
2369 case lir_mul_strictfp: // fall through
2370 case lir_mul:
2371 if (pop_fpu_stack) __ fmulp(non_tos_index);
2372 else if (dest_is_tos) __ fmul (non_tos_index);
2373 else __ fmula(non_tos_index);
2374 break;
2375
2376 case lir_div_strictfp: // fall through
2377 case lir_div:
2378 if (left_is_tos) {
2379 if (pop_fpu_stack) __ fdivrp(non_tos_index);
2380 else if (dest_is_tos) __ fdiv (non_tos_index);
2381 else __ fdivra(non_tos_index);
2382 } else {
2383 if (pop_fpu_stack) __ fdivp (non_tos_index);
2384 else if (dest_is_tos) __ fdivr (non_tos_index);
2385 else __ fdiva (non_tos_index);
2386 }
2387 break;
2388
2389 case lir_rem:
2390 assert(left_is_tos && dest_is_tos && right_index == 1, "must be guaranteed by FPU stack allocation");
2391 __ fremr(noreg);
2392 break;
2393
2394 default:
2395 ShouldNotReachHere();
2396 }
2397 }
2398
2399
2400 void LIR_Assembler::intrinsic_op(LIR_Code code, LIR_Opr value, LIR_Opr unused, LIR_Opr dest, LIR_Op* op) {
2401 if (value->is_double_xmm()) {
2402 switch(code) {
2403 case lir_abs :
2404 {
2405 if (dest->as_xmm_double_reg() != value->as_xmm_double_reg()) {
2406 __ movdbl(dest->as_xmm_double_reg(), value->as_xmm_double_reg());
2407 }
2408 __ andpd(dest->as_xmm_double_reg(),
2409 ExternalAddress((address)double_signmask_pool));
2410 }
2411 break;
2412
2413 case lir_sqrt: __ sqrtsd(dest->as_xmm_double_reg(), value->as_xmm_double_reg()); break;
2414 // all other intrinsics are not available in the SSE instruction set, so FPU is used
2415 default : ShouldNotReachHere();
2416 }
2417
2418 } else if (value->is_double_fpu()) {
2419 assert(value->fpu_regnrLo() == 0 && dest->fpu_regnrLo() == 0, "both must be on TOS");
2420 switch(code) {
2421 case lir_abs : __ fabs() ; break;
2422 case lir_sqrt : __ fsqrt(); break;
2423 default : ShouldNotReachHere();
2424 }
2425 } else {
2426 Unimplemented();
2427 }
2428 }
2429
2430 void LIR_Assembler::logic_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst) {
2431 // assert(left->destroys_register(), "check");
2432 if (left->is_single_cpu()) {
2433 Register reg = left->as_register();
2434 if (right->is_constant()) {
2435 int val = right->as_constant_ptr()->as_jint();
2436 switch (code) {
2437 case lir_logic_and: __ andl (reg, val); break;
2438 case lir_logic_or: __ orl (reg, val); break;
2439 case lir_logic_xor: __ xorl (reg, val); break;
2440 default: ShouldNotReachHere();
2441 }
2442 } else if (right->is_stack()) {
2443 // added support for stack operands
2444 Address raddr = frame_map()->address_for_slot(right->single_stack_ix());
2445 switch (code) {
2446 case lir_logic_and: __ andl (reg, raddr); break;
2447 case lir_logic_or: __ orl (reg, raddr); break;
2448 case lir_logic_xor: __ xorl (reg, raddr); break;
2449 default: ShouldNotReachHere();
2450 }
2451 } else {
2452 Register rright = right->as_register();
2453 switch (code) {
2454 case lir_logic_and: __ andptr (reg, rright); break;
2455 case lir_logic_or : __ orptr (reg, rright); break;
2456 case lir_logic_xor: __ xorptr (reg, rright); break;
2457 default: ShouldNotReachHere();
2458 }
2459 }
2460 move_regs(reg, dst->as_register());
2461 } else {
2462 Register l_lo = left->as_register_lo();
2463 Register l_hi = left->as_register_hi();
2464 if (right->is_constant()) {
2465 #ifdef _LP64
2466 __ mov64(rscratch1, right->as_constant_ptr()->as_jlong());
2467 switch (code) {
2468 case lir_logic_and:
2469 __ andq(l_lo, rscratch1);
2470 break;
2471 case lir_logic_or:
2472 __ orq(l_lo, rscratch1);
2473 break;
2474 case lir_logic_xor:
2475 __ xorq(l_lo, rscratch1);
2476 break;
2477 default: ShouldNotReachHere();
2478 }
2479 #else
2480 int r_lo = right->as_constant_ptr()->as_jint_lo();
2481 int r_hi = right->as_constant_ptr()->as_jint_hi();
2482 switch (code) {
2483 case lir_logic_and:
2484 __ andl(l_lo, r_lo);
2485 __ andl(l_hi, r_hi);
2486 break;
2487 case lir_logic_or:
2488 __ orl(l_lo, r_lo);
2489 __ orl(l_hi, r_hi);
2490 break;
2491 case lir_logic_xor:
2492 __ xorl(l_lo, r_lo);
2493 __ xorl(l_hi, r_hi);
2494 break;
2495 default: ShouldNotReachHere();
2496 }
2497 #endif // _LP64
2498 } else {
2499 #ifdef _LP64
2500 Register r_lo;
2501 if (right->type() == T_OBJECT || right->type() == T_ARRAY) {
2502 r_lo = right->as_register();
2503 } else {
2504 r_lo = right->as_register_lo();
2505 }
2506 #else
2507 Register r_lo = right->as_register_lo();
2508 Register r_hi = right->as_register_hi();
2509 assert(l_lo != r_hi, "overwriting registers");
2510 #endif
2511 switch (code) {
2512 case lir_logic_and:
2513 __ andptr(l_lo, r_lo);
2514 NOT_LP64(__ andptr(l_hi, r_hi);)
2515 break;
2516 case lir_logic_or:
2517 __ orptr(l_lo, r_lo);
2518 NOT_LP64(__ orptr(l_hi, r_hi);)
2519 break;
2520 case lir_logic_xor:
2521 __ xorptr(l_lo, r_lo);
2522 NOT_LP64(__ xorptr(l_hi, r_hi);)
2523 break;
2524 default: ShouldNotReachHere();
2525 }
2526 }
2527
2528 Register dst_lo = dst->as_register_lo();
2529 Register dst_hi = dst->as_register_hi();
2530
2531 #ifdef _LP64
2532 move_regs(l_lo, dst_lo);
2533 #else
2534 if (dst_lo == l_hi) {
2535 assert(dst_hi != l_lo, "overwriting registers");
2536 move_regs(l_hi, dst_hi);
2537 move_regs(l_lo, dst_lo);
2538 } else {
2539 assert(dst_lo != l_hi, "overwriting registers");
2540 move_regs(l_lo, dst_lo);
2541 move_regs(l_hi, dst_hi);
2542 }
2543 #endif // _LP64
2544 }
2545 }
2546
2547
2548 // we assume that rax, and rdx can be overwritten
2549 void LIR_Assembler::arithmetic_idiv(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr temp, LIR_Opr result, CodeEmitInfo* info) {
2550
2551 assert(left->is_single_cpu(), "left must be register");
2552 assert(right->is_single_cpu() || right->is_constant(), "right must be register or constant");
2553 assert(result->is_single_cpu(), "result must be register");
2554
2555 // assert(left->destroys_register(), "check");
2556 // assert(right->destroys_register(), "check");
2557
2558 Register lreg = left->as_register();
2559 Register dreg = result->as_register();
2560
2561 if (right->is_constant()) {
2562 int divisor = right->as_constant_ptr()->as_jint();
2563 assert(divisor > 0 && is_power_of_2(divisor), "must be");
2564 if (code == lir_idiv) {
2565 assert(lreg == rax, "must be rax,");
2566 assert(temp->as_register() == rdx, "tmp register must be rdx");
2567 __ cdql(); // sign extend into rdx:rax
2568 if (divisor == 2) {
2569 __ subl(lreg, rdx);
2570 } else {
2571 __ andl(rdx, divisor - 1);
2572 __ addl(lreg, rdx);
2573 }
2574 __ sarl(lreg, log2_intptr(divisor));
2575 move_regs(lreg, dreg);
2576 } else if (code == lir_irem) {
2577 Label done;
2578 __ mov(dreg, lreg);
2579 __ andl(dreg, 0x80000000 | (divisor - 1));
2580 __ jcc(Assembler::positive, done);
2581 __ decrement(dreg);
2582 __ orl(dreg, ~(divisor - 1));
2583 __ increment(dreg);
2584 __ bind(done);
2585 } else {
2586 ShouldNotReachHere();
2587 }
2588 } else {
2589 Register rreg = right->as_register();
2590 assert(lreg == rax, "left register must be rax,");
2591 assert(rreg != rdx, "right register must not be rdx");
2592 assert(temp->as_register() == rdx, "tmp register must be rdx");
2593
2594 move_regs(lreg, rax);
2595
2596 int idivl_offset = __ corrected_idivl(rreg);
2597 if (ImplicitDiv0Checks) {
2598 add_debug_info_for_div0(idivl_offset, info);
2599 }
2600 if (code == lir_irem) {
2601 move_regs(rdx, dreg); // result is in rdx
2602 } else {
2603 move_regs(rax, dreg);
2604 }
2605 }
2606 }
2607
2608
2609 void LIR_Assembler::comp_op(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Op2* op) {
2610 if (opr1->is_single_cpu()) {
2611 Register reg1 = opr1->as_register();
2612 if (opr2->is_single_cpu()) {
2613 // cpu register - cpu register
2614 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) {
2615 __ cmpoop(reg1, opr2->as_register());
2616 } else {
2617 assert(opr2->type() != T_OBJECT && opr2->type() != T_ARRAY, "cmp int, oop?");
2618 __ cmpl(reg1, opr2->as_register());
2619 }
2620 } else if (opr2->is_stack()) {
2621 // cpu register - stack
2622 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) {
2623 __ cmpoop(reg1, frame_map()->address_for_slot(opr2->single_stack_ix()));
2624 } else {
2625 __ cmpl(reg1, frame_map()->address_for_slot(opr2->single_stack_ix()));
2626 }
2627 } else if (opr2->is_constant()) {
2628 // cpu register - constant
2629 LIR_Const* c = opr2->as_constant_ptr();
2630 if (c->type() == T_INT) {
2631 __ cmpl(reg1, c->as_jint());
2632 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) {
2633 // In 64bit oops are single register
2634 jobject o = c->as_jobject();
2635 if (o == NULL) {
2636 __ cmpptr(reg1, (int32_t)NULL_WORD);
2637 } else {
2638 __ cmpoop(reg1, o);
2639 }
2640 } else {
2641 fatal("unexpected type: %s", basictype_to_str(c->type()));
2642 }
2643 // cpu register - address
2644 } else if (opr2->is_address()) {
2645 if (op->info() != NULL) {
2646 add_debug_info_for_null_check_here(op->info());
2647 }
2648 __ cmpl(reg1, as_Address(opr2->as_address_ptr()));
2649 } else {
2650 ShouldNotReachHere();
2651 }
2652
2653 } else if(opr1->is_double_cpu()) {
2654 Register xlo = opr1->as_register_lo();
2655 Register xhi = opr1->as_register_hi();
2656 if (opr2->is_double_cpu()) {
2657 #ifdef _LP64
2658 __ cmpptr(xlo, opr2->as_register_lo());
2659 #else
2660 // cpu register - cpu register
2661 Register ylo = opr2->as_register_lo();
2662 Register yhi = opr2->as_register_hi();
2663 __ subl(xlo, ylo);
2664 __ sbbl(xhi, yhi);
2665 if (condition == lir_cond_equal || condition == lir_cond_notEqual) {
2666 __ orl(xhi, xlo);
2667 }
2668 #endif // _LP64
2669 } else if (opr2->is_constant()) {
2670 // cpu register - constant 0
2671 assert(opr2->as_jlong() == (jlong)0, "only handles zero");
2672 #ifdef _LP64
2673 __ cmpptr(xlo, (int32_t)opr2->as_jlong());
2674 #else
2675 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "only handles equals case");
2676 __ orl(xhi, xlo);
2677 #endif // _LP64
2678 } else {
2679 ShouldNotReachHere();
2680 }
2681
2682 } else if (opr1->is_single_xmm()) {
2683 XMMRegister reg1 = opr1->as_xmm_float_reg();
2684 if (opr2->is_single_xmm()) {
2685 // xmm register - xmm register
2686 __ ucomiss(reg1, opr2->as_xmm_float_reg());
2687 } else if (opr2->is_stack()) {
2688 // xmm register - stack
2689 __ ucomiss(reg1, frame_map()->address_for_slot(opr2->single_stack_ix()));
2690 } else if (opr2->is_constant()) {
2691 // xmm register - constant
2692 __ ucomiss(reg1, InternalAddress(float_constant(opr2->as_jfloat())));
2693 } else if (opr2->is_address()) {
2694 // xmm register - address
2695 if (op->info() != NULL) {
2696 add_debug_info_for_null_check_here(op->info());
2697 }
2698 __ ucomiss(reg1, as_Address(opr2->as_address_ptr()));
2699 } else {
2700 ShouldNotReachHere();
2701 }
2702
2703 } else if (opr1->is_double_xmm()) {
2704 XMMRegister reg1 = opr1->as_xmm_double_reg();
2705 if (opr2->is_double_xmm()) {
2706 // xmm register - xmm register
2707 __ ucomisd(reg1, opr2->as_xmm_double_reg());
2708 } else if (opr2->is_stack()) {
2709 // xmm register - stack
2710 __ ucomisd(reg1, frame_map()->address_for_slot(opr2->double_stack_ix()));
2711 } else if (opr2->is_constant()) {
2712 // xmm register - constant
2713 __ ucomisd(reg1, InternalAddress(double_constant(opr2->as_jdouble())));
2714 } else if (opr2->is_address()) {
2715 // xmm register - address
2716 if (op->info() != NULL) {
2717 add_debug_info_for_null_check_here(op->info());
2718 }
2719 __ ucomisd(reg1, as_Address(opr2->pointer()->as_address()));
2720 } else {
2721 ShouldNotReachHere();
2722 }
2723
2724 } else if(opr1->is_single_fpu() || opr1->is_double_fpu()) {
2725 assert(opr1->is_fpu_register() && opr1->fpu() == 0, "currently left-hand side must be on TOS (relax this restriction)");
2726 assert(opr2->is_fpu_register(), "both must be registers");
2727 __ fcmp(noreg, opr2->fpu(), op->fpu_pop_count() > 0, op->fpu_pop_count() > 1);
2728
2729 } else if (opr1->is_address() && opr2->is_constant()) {
2730 LIR_Const* c = opr2->as_constant_ptr();
2731 #ifdef _LP64
2732 if (c->type() == T_OBJECT || c->type() == T_ARRAY) {
2733 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "need to reverse");
2734 __ movoop(rscratch1, c->as_jobject());
2735 }
2736 #endif // LP64
2737 if (op->info() != NULL) {
2738 add_debug_info_for_null_check_here(op->info());
2739 }
2740 // special case: address - constant
2741 LIR_Address* addr = opr1->as_address_ptr();
2742 if (c->type() == T_INT) {
2743 __ cmpl(as_Address(addr), c->as_jint());
2744 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) {
2745 #ifdef _LP64
2746 // %%% Make this explode if addr isn't reachable until we figure out a
2747 // better strategy by giving noreg as the temp for as_Address
2748 __ cmpoop(rscratch1, as_Address(addr, noreg));
2749 #else
2750 __ cmpoop(as_Address(addr), c->as_jobject());
2751 #endif // _LP64
2752 } else {
2753 ShouldNotReachHere();
2754 }
2755
2756 } else {
2757 ShouldNotReachHere();
2758 }
2759 }
2760
2761 void LIR_Assembler::comp_fl2i(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst, LIR_Op2* op) {
2762 if (code == lir_cmp_fd2i || code == lir_ucmp_fd2i) {
2763 if (left->is_single_xmm()) {
2764 assert(right->is_single_xmm(), "must match");
2765 __ cmpss2int(left->as_xmm_float_reg(), right->as_xmm_float_reg(), dst->as_register(), code == lir_ucmp_fd2i);
2766 } else if (left->is_double_xmm()) {
2767 assert(right->is_double_xmm(), "must match");
2768 __ cmpsd2int(left->as_xmm_double_reg(), right->as_xmm_double_reg(), dst->as_register(), code == lir_ucmp_fd2i);
2769
2770 } else {
2771 assert(left->is_single_fpu() || left->is_double_fpu(), "must be");
2772 assert(right->is_single_fpu() || right->is_double_fpu(), "must match");
2773
2774 assert(left->fpu() == 0, "left must be on TOS");
2775 __ fcmp2int(dst->as_register(), code == lir_ucmp_fd2i, right->fpu(),
2776 op->fpu_pop_count() > 0, op->fpu_pop_count() > 1);
2777 }
2778 } else {
2779 assert(code == lir_cmp_l2i, "check");
2780 #ifdef _LP64
2781 Label done;
2782 Register dest = dst->as_register();
2783 __ cmpptr(left->as_register_lo(), right->as_register_lo());
2784 __ movl(dest, -1);
2785 __ jccb(Assembler::less, done);
2786 __ set_byte_if_not_zero(dest);
2787 __ movzbl(dest, dest);
2788 __ bind(done);
2789 #else
2790 __ lcmp2int(left->as_register_hi(),
2791 left->as_register_lo(),
2792 right->as_register_hi(),
2793 right->as_register_lo());
2794 move_regs(left->as_register_hi(), dst->as_register());
2795 #endif // _LP64
2796 }
2797 }
2798
2799
2800 void LIR_Assembler::align_call(LIR_Code code) {
2801 if (os::is_MP()) {
2802 // make sure that the displacement word of the call ends up word aligned
2803 int offset = __ offset();
2804 switch (code) {
2805 case lir_static_call:
2806 case lir_optvirtual_call:
2807 case lir_dynamic_call:
2808 offset += NativeCall::displacement_offset;
2809 break;
2810 case lir_icvirtual_call:
2811 offset += NativeCall::displacement_offset + NativeMovConstReg::instruction_size;
2812 break;
2813 case lir_virtual_call: // currently, sparc-specific for niagara
2814 default: ShouldNotReachHere();
2815 }
2816 __ align(BytesPerWord, offset);
2817 }
2818 }
2819
2820
2821 void LIR_Assembler::call(LIR_OpJavaCall* op, relocInfo::relocType rtype) {
2822 assert(!os::is_MP() || (__ offset() + NativeCall::displacement_offset) % BytesPerWord == 0,
2823 "must be aligned");
2824 __ call(AddressLiteral(op->addr(), rtype));
2825 add_call_info(code_offset(), op->info());
2826 }
2827
2828
2829 void LIR_Assembler::ic_call(LIR_OpJavaCall* op) {
2830 __ ic_call(op->addr());
2831 add_call_info(code_offset(), op->info());
2832 assert(!os::is_MP() ||
2833 (__ offset() - NativeCall::instruction_size + NativeCall::displacement_offset) % BytesPerWord == 0,
2834 "must be aligned");
2835 }
2836
2837
2838 /* Currently, vtable-dispatch is only enabled for sparc platforms */
2839 void LIR_Assembler::vtable_call(LIR_OpJavaCall* op) {
2840 ShouldNotReachHere();
2841 }
2842
2843
2844 void LIR_Assembler::emit_static_call_stub() {
2845 address call_pc = __ pc();
2846 address stub = __ start_a_stub(call_stub_size());
2847 if (stub == NULL) {
2848 bailout("static call stub overflow");
2849 return;
2850 }
2851
2852 int start = __ offset();
2853 if (os::is_MP()) {
2854 // make sure that the displacement word of the call ends up word aligned
2855 __ align(BytesPerWord, __ offset() + NativeMovConstReg::instruction_size + NativeCall::displacement_offset);
2856 }
2857 __ relocate(static_stub_Relocation::spec(call_pc, false /* is_aot */));
2858 __ mov_metadata(rbx, (Metadata*)NULL);
2859 // must be set to -1 at code generation time
2860 assert(!os::is_MP() || ((__ offset() + 1) % BytesPerWord) == 0, "must be aligned on MP");
2861 // On 64bit this will die since it will take a movq & jmp, must be only a jmp
2862 __ jump(RuntimeAddress(__ pc()));
2863
2864 if (UseAOT) {
2865 // Trampoline to aot code
2866 __ relocate(static_stub_Relocation::spec(call_pc, true /* is_aot */));
2867 #ifdef _LP64
2868 __ mov64(rax, CONST64(0)); // address is zapped till fixup time.
2869 #else
2870 __ movl(rax, 0xdeadffff); // address is zapped till fixup time.
2871 #endif
2872 __ jmp(rax);
2873 }
2874 assert(__ offset() - start <= call_stub_size(), "stub too big");
2875 __ end_a_stub();
2876 }
2877
2878
2879 void LIR_Assembler::throw_op(LIR_Opr exceptionPC, LIR_Opr exceptionOop, CodeEmitInfo* info) {
2880 assert(exceptionOop->as_register() == rax, "must match");
2881 assert(exceptionPC->as_register() == rdx, "must match");
2882
2883 // exception object is not added to oop map by LinearScan
2884 // (LinearScan assumes that no oops are in fixed registers)
2885 info->add_register_oop(exceptionOop);
2886 Runtime1::StubID unwind_id;
2887
2888 // get current pc information
2889 // pc is only needed if the method has an exception handler, the unwind code does not need it.
2890 int pc_for_athrow_offset = __ offset();
2891 InternalAddress pc_for_athrow(__ pc());
2892 __ lea(exceptionPC->as_register(), pc_for_athrow);
2893 add_call_info(pc_for_athrow_offset, info); // for exception handler
2894
2895 __ verify_not_null_oop(rax);
2896 // search an exception handler (rax: exception oop, rdx: throwing pc)
2897 if (compilation()->has_fpu_code()) {
2898 unwind_id = Runtime1::handle_exception_id;
2899 } else {
2900 unwind_id = Runtime1::handle_exception_nofpu_id;
2901 }
2902 __ call(RuntimeAddress(Runtime1::entry_for(unwind_id)));
2903
2904 // enough room for two byte trap
2905 __ nop();
2906 }
2907
2908
2909 void LIR_Assembler::unwind_op(LIR_Opr exceptionOop) {
2910 assert(exceptionOop->as_register() == rax, "must match");
2911
2912 __ jmp(_unwind_handler_entry);
2913 }
2914
2915
2916 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, LIR_Opr count, LIR_Opr dest, LIR_Opr tmp) {
2917
2918 // optimized version for linear scan:
2919 // * count must be already in ECX (guaranteed by LinearScan)
2920 // * left and dest must be equal
2921 // * tmp must be unused
2922 assert(count->as_register() == SHIFT_count, "count must be in ECX");
2923 assert(left == dest, "left and dest must be equal");
2924 assert(tmp->is_illegal(), "wasting a register if tmp is allocated");
2925
2926 if (left->is_single_cpu()) {
2927 Register value = left->as_register();
2928 assert(value != SHIFT_count, "left cannot be ECX");
2929
2930 switch (code) {
2931 case lir_shl: __ shll(value); break;
2932 case lir_shr: __ sarl(value); break;
2933 case lir_ushr: __ shrl(value); break;
2934 default: ShouldNotReachHere();
2935 }
2936 } else if (left->is_double_cpu()) {
2937 Register lo = left->as_register_lo();
2938 Register hi = left->as_register_hi();
2939 assert(lo != SHIFT_count && hi != SHIFT_count, "left cannot be ECX");
2940 #ifdef _LP64
2941 switch (code) {
2942 case lir_shl: __ shlptr(lo); break;
2943 case lir_shr: __ sarptr(lo); break;
2944 case lir_ushr: __ shrptr(lo); break;
2945 default: ShouldNotReachHere();
2946 }
2947 #else
2948
2949 switch (code) {
2950 case lir_shl: __ lshl(hi, lo); break;
2951 case lir_shr: __ lshr(hi, lo, true); break;
2952 case lir_ushr: __ lshr(hi, lo, false); break;
2953 default: ShouldNotReachHere();
2954 }
2955 #endif // LP64
2956 } else {
2957 ShouldNotReachHere();
2958 }
2959 }
2960
2961
2962 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, jint count, LIR_Opr dest) {
2963 if (dest->is_single_cpu()) {
2964 // first move left into dest so that left is not destroyed by the shift
2965 Register value = dest->as_register();
2966 count = count & 0x1F; // Java spec
2967
2968 move_regs(left->as_register(), value);
2969 switch (code) {
2970 case lir_shl: __ shll(value, count); break;
2971 case lir_shr: __ sarl(value, count); break;
2972 case lir_ushr: __ shrl(value, count); break;
2973 default: ShouldNotReachHere();
2974 }
2975 } else if (dest->is_double_cpu()) {
2976 #ifndef _LP64
2977 Unimplemented();
2978 #else
2979 // first move left into dest so that left is not destroyed by the shift
2980 Register value = dest->as_register_lo();
2981 count = count & 0x1F; // Java spec
2982
2983 move_regs(left->as_register_lo(), value);
2984 switch (code) {
2985 case lir_shl: __ shlptr(value, count); break;
2986 case lir_shr: __ sarptr(value, count); break;
2987 case lir_ushr: __ shrptr(value, count); break;
2988 default: ShouldNotReachHere();
2989 }
2990 #endif // _LP64
2991 } else {
2992 ShouldNotReachHere();
2993 }
2994 }
2995
2996
2997 void LIR_Assembler::store_parameter(Register r, 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), r);
3002 }
3003
3004
3005 void LIR_Assembler::store_parameter(jint c, 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 __ movptr (Address(rsp, offset_from_rsp_in_bytes), c);
3010 }
3011
3012
3013 void LIR_Assembler::store_parameter(jobject o, 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 __ movoop (Address(rsp, offset_from_rsp_in_bytes), o);
3018 }
3019
3020
3021 void LIR_Assembler::store_parameter(Metadata* m, int offset_from_rsp_in_words) {
3022 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
3023 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
3024 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
3025 __ mov_metadata(Address(rsp, offset_from_rsp_in_bytes), m);
3026 }
3027
3028
3029 // This code replaces a call to arraycopy; no exception may
3030 // be thrown in this code, they must be thrown in the System.arraycopy
3031 // activation frame; we could save some checks if this would not be the case
3032 void LIR_Assembler::emit_arraycopy(LIR_OpArrayCopy* op) {
3033 ciArrayKlass* default_type = op->expected_type();
3034 Register src = op->src()->as_register();
3035 Register dst = op->dst()->as_register();
3036 Register src_pos = op->src_pos()->as_register();
3037 Register dst_pos = op->dst_pos()->as_register();
3038 Register length = op->length()->as_register();
3039 Register tmp = op->tmp()->as_register();
3040
3041 CodeStub* stub = op->stub();
3042 int flags = op->flags();
3043 BasicType basic_type = default_type != NULL ? default_type->element_type()->basic_type() : T_ILLEGAL;
3044 if (basic_type == T_ARRAY) basic_type = T_OBJECT;
3045
3046 // if we don't know anything, just go through the generic arraycopy
3047 if (default_type == NULL) {
3048 Label done;
3049 // save outgoing arguments on stack in case call to System.arraycopy is needed
3050 // HACK ALERT. This code used to push the parameters in a hardwired fashion
3051 // for interpreter calling conventions. Now we have to do it in new style conventions.
3052 // For the moment until C1 gets the new register allocator I just force all the
3053 // args to the right place (except the register args) and then on the back side
3054 // reload the register args properly if we go slow path. Yuck
3055
3056 // These are proper for the calling convention
3057 store_parameter(length, 2);
3058 store_parameter(dst_pos, 1);
3059 store_parameter(dst, 0);
3060
3061 // these are just temporary placements until we need to reload
3062 store_parameter(src_pos, 3);
3063 store_parameter(src, 4);
3064 NOT_LP64(assert(src == rcx && src_pos == rdx, "mismatch in calling convention");)
3065
3066 address copyfunc_addr = StubRoutines::generic_arraycopy();
3067 assert(copyfunc_addr != NULL, "generic arraycopy stub required");
3068
3069 // pass arguments: may push as this is not a safepoint; SP must be fix at each safepoint
3070 #ifdef _LP64
3071 // The arguments are in java calling convention so we can trivially shift them to C
3072 // convention
3073 assert_different_registers(c_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4);
3074 __ mov(c_rarg0, j_rarg0);
3075 assert_different_registers(c_rarg1, j_rarg2, j_rarg3, j_rarg4);
3076 __ mov(c_rarg1, j_rarg1);
3077 assert_different_registers(c_rarg2, j_rarg3, j_rarg4);
3078 __ mov(c_rarg2, j_rarg2);
3079 assert_different_registers(c_rarg3, j_rarg4);
3080 __ mov(c_rarg3, j_rarg3);
3081 #ifdef _WIN64
3082 // Allocate abi space for args but be sure to keep stack aligned
3083 __ subptr(rsp, 6*wordSize);
3084 store_parameter(j_rarg4, 4);
3085 #ifndef PRODUCT
3086 if (PrintC1Statistics) {
3087 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt));
3088 }
3089 #endif
3090 __ call(RuntimeAddress(copyfunc_addr));
3091 __ addptr(rsp, 6*wordSize);
3092 #else
3093 __ mov(c_rarg4, j_rarg4);
3094 #ifndef PRODUCT
3095 if (PrintC1Statistics) {
3096 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt));
3097 }
3098 #endif
3099 __ call(RuntimeAddress(copyfunc_addr));
3100 #endif // _WIN64
3101 #else
3102 __ push(length);
3103 __ push(dst_pos);
3104 __ push(dst);
3105 __ push(src_pos);
3106 __ push(src);
3107
3108 #ifndef PRODUCT
3109 if (PrintC1Statistics) {
3110 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt));
3111 }
3112 #endif
3113 __ call_VM_leaf(copyfunc_addr, 5); // removes pushed parameter from the stack
3114
3115 #endif // _LP64
3116
3117 __ cmpl(rax, 0);
3118 __ jcc(Assembler::equal, *stub->continuation());
3119
3120 __ mov(tmp, rax);
3121 __ xorl(tmp, -1);
3122
3123 // Reload values from the stack so they are where the stub
3124 // expects them.
3125 __ movptr (dst, Address(rsp, 0*BytesPerWord));
3126 __ movptr (dst_pos, Address(rsp, 1*BytesPerWord));
3127 __ movptr (length, Address(rsp, 2*BytesPerWord));
3128 __ movptr (src_pos, Address(rsp, 3*BytesPerWord));
3129 __ movptr (src, Address(rsp, 4*BytesPerWord));
3130
3131 __ subl(length, tmp);
3132 __ addl(src_pos, tmp);
3133 __ addl(dst_pos, tmp);
3134 __ jmp(*stub->entry());
3135
3136 __ bind(*stub->continuation());
3137 return;
3138 }
3139
3140 assert(default_type != NULL && default_type->is_array_klass() && default_type->is_loaded(), "must be true at this point");
3141
3142 int elem_size = type2aelembytes(basic_type);
3143 Address::ScaleFactor scale;
3144
3145 switch (elem_size) {
3146 case 1 :
3147 scale = Address::times_1;
3148 break;
3149 case 2 :
3150 scale = Address::times_2;
3151 break;
3152 case 4 :
3153 scale = Address::times_4;
3154 break;
3155 case 8 :
3156 scale = Address::times_8;
3157 break;
3158 default:
3159 scale = Address::no_scale;
3160 ShouldNotReachHere();
3161 }
3162
3163 Address src_length_addr = Address(src, arrayOopDesc::length_offset_in_bytes());
3164 Address dst_length_addr = Address(dst, arrayOopDesc::length_offset_in_bytes());
3165 Address src_klass_addr = Address(src, oopDesc::klass_offset_in_bytes());
3166 Address dst_klass_addr = Address(dst, oopDesc::klass_offset_in_bytes());
3167
3168 // length and pos's are all sign extended at this point on 64bit
3169
3170 // test for NULL
3171 if (flags & LIR_OpArrayCopy::src_null_check) {
3172 __ testptr(src, src);
3173 __ jcc(Assembler::zero, *stub->entry());
3174 }
3175 if (flags & LIR_OpArrayCopy::dst_null_check) {
3176 __ testptr(dst, dst);
3177 __ jcc(Assembler::zero, *stub->entry());
3178 }
3179
3180 // If the compiler was not able to prove that exact type of the source or the destination
3181 // of the arraycopy is an array type, check at runtime if the source or the destination is
3182 // an instance type.
3183 if (flags & LIR_OpArrayCopy::type_check) {
3184 if (!(flags & LIR_OpArrayCopy::dst_objarray)) {
3185 __ load_klass(tmp, dst);
3186 __ cmpl(Address(tmp, in_bytes(Klass::layout_helper_offset())), Klass::_lh_neutral_value);
3187 __ jcc(Assembler::greaterEqual, *stub->entry());
3188 }
3189
3190 if (!(flags & LIR_OpArrayCopy::src_objarray)) {
3191 __ load_klass(tmp, src);
3192 __ cmpl(Address(tmp, in_bytes(Klass::layout_helper_offset())), Klass::_lh_neutral_value);
3193 __ jcc(Assembler::greaterEqual, *stub->entry());
3194 }
3195 }
3196
3197 // check if negative
3198 if (flags & LIR_OpArrayCopy::src_pos_positive_check) {
3199 __ testl(src_pos, src_pos);
3200 __ jcc(Assembler::less, *stub->entry());
3201 }
3202 if (flags & LIR_OpArrayCopy::dst_pos_positive_check) {
3203 __ testl(dst_pos, dst_pos);
3204 __ jcc(Assembler::less, *stub->entry());
3205 }
3206
3207 if (flags & LIR_OpArrayCopy::src_range_check) {
3208 __ lea(tmp, Address(src_pos, length, Address::times_1, 0));
3209 __ cmpl(tmp, src_length_addr);
3210 __ jcc(Assembler::above, *stub->entry());
3211 }
3212 if (flags & LIR_OpArrayCopy::dst_range_check) {
3213 __ lea(tmp, Address(dst_pos, length, Address::times_1, 0));
3214 __ cmpl(tmp, dst_length_addr);
3215 __ jcc(Assembler::above, *stub->entry());
3216 }
3217
3218 if (flags & LIR_OpArrayCopy::length_positive_check) {
3219 __ testl(length, length);
3220 __ jcc(Assembler::less, *stub->entry());
3221 }
3222
3223 #ifdef _LP64
3224 __ movl2ptr(src_pos, src_pos); //higher 32bits must be null
3225 __ movl2ptr(dst_pos, dst_pos); //higher 32bits must be null
3226 #endif
3227
3228 if (flags & LIR_OpArrayCopy::type_check) {
3229 // We don't know the array types are compatible
3230 if (basic_type != T_OBJECT) {
3231 // Simple test for basic type arrays
3232 if (UseCompressedClassPointers) {
3233 __ movl(tmp, src_klass_addr);
3234 __ cmpl(tmp, dst_klass_addr);
3235 } else {
3236 __ movptr(tmp, src_klass_addr);
3237 __ cmpptr(tmp, dst_klass_addr);
3238 }
3239 __ jcc(Assembler::notEqual, *stub->entry());
3240 } else {
3241 // For object arrays, if src is a sub class of dst then we can
3242 // safely do the copy.
3243 Label cont, slow;
3244
3245 __ push(src);
3246 __ push(dst);
3247
3248 __ load_klass(src, src);
3249 __ load_klass(dst, dst);
3250
3251 __ check_klass_subtype_fast_path(src, dst, tmp, &cont, &slow, NULL);
3252
3253 __ push(src);
3254 __ push(dst);
3255 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
3256 __ pop(dst);
3257 __ pop(src);
3258
3259 __ cmpl(src, 0);
3260 __ jcc(Assembler::notEqual, cont);
3261
3262 __ bind(slow);
3263 __ pop(dst);
3264 __ pop(src);
3265
3266 address copyfunc_addr = StubRoutines::checkcast_arraycopy();
3267 if (copyfunc_addr != NULL) { // use stub if available
3268 // src is not a sub class of dst so we have to do a
3269 // per-element check.
3270
3271 int mask = LIR_OpArrayCopy::src_objarray|LIR_OpArrayCopy::dst_objarray;
3272 if ((flags & mask) != mask) {
3273 // Check that at least both of them object arrays.
3274 assert(flags & mask, "one of the two should be known to be an object array");
3275
3276 if (!(flags & LIR_OpArrayCopy::src_objarray)) {
3277 __ load_klass(tmp, src);
3278 } else if (!(flags & LIR_OpArrayCopy::dst_objarray)) {
3279 __ load_klass(tmp, dst);
3280 }
3281 int lh_offset = in_bytes(Klass::layout_helper_offset());
3282 Address klass_lh_addr(tmp, lh_offset);
3283 jint objArray_lh = Klass::array_layout_helper(T_OBJECT);
3284 __ cmpl(klass_lh_addr, objArray_lh);
3285 __ jcc(Assembler::notEqual, *stub->entry());
3286 }
3287
3288 // Spill because stubs can use any register they like and it's
3289 // easier to restore just those that we care about.
3290 store_parameter(dst, 0);
3291 store_parameter(dst_pos, 1);
3292 store_parameter(length, 2);
3293 store_parameter(src_pos, 3);
3294 store_parameter(src, 4);
3295
3296 #ifndef _LP64
3297 __ movptr(tmp, dst_klass_addr);
3298 __ movptr(tmp, Address(tmp, ObjArrayKlass::element_klass_offset()));
3299 __ push(tmp);
3300 __ movl(tmp, Address(tmp, Klass::super_check_offset_offset()));
3301 __ push(tmp);
3302 __ push(length);
3303 __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3304 __ push(tmp);
3305 __ lea(tmp, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3306 __ push(tmp);
3307
3308 __ call_VM_leaf(copyfunc_addr, 5);
3309 #else
3310 __ movl2ptr(length, length); //higher 32bits must be null
3311
3312 __ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3313 assert_different_registers(c_rarg0, dst, dst_pos, length);
3314 __ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3315 assert_different_registers(c_rarg1, dst, length);
3316
3317 __ mov(c_rarg2, length);
3318 assert_different_registers(c_rarg2, dst);
3319
3320 #ifdef _WIN64
3321 // Allocate abi space for args but be sure to keep stack aligned
3322 __ subptr(rsp, 6*wordSize);
3323 __ load_klass(c_rarg3, dst);
3324 __ movptr(c_rarg3, Address(c_rarg3, ObjArrayKlass::element_klass_offset()));
3325 store_parameter(c_rarg3, 4);
3326 __ movl(c_rarg3, Address(c_rarg3, Klass::super_check_offset_offset()));
3327 __ call(RuntimeAddress(copyfunc_addr));
3328 __ addptr(rsp, 6*wordSize);
3329 #else
3330 __ load_klass(c_rarg4, dst);
3331 __ movptr(c_rarg4, Address(c_rarg4, ObjArrayKlass::element_klass_offset()));
3332 __ movl(c_rarg3, Address(c_rarg4, Klass::super_check_offset_offset()));
3333 __ call(RuntimeAddress(copyfunc_addr));
3334 #endif
3335
3336 #endif
3337
3338 #ifndef PRODUCT
3339 if (PrintC1Statistics) {
3340 Label failed;
3341 __ testl(rax, rax);
3342 __ jcc(Assembler::notZero, failed);
3343 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_cnt));
3344 __ bind(failed);
3345 }
3346 #endif
3347
3348 __ testl(rax, rax);
3349 __ jcc(Assembler::zero, *stub->continuation());
3350
3351 #ifndef PRODUCT
3352 if (PrintC1Statistics) {
3353 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_attempt_cnt));
3354 }
3355 #endif
3356
3357 __ mov(tmp, rax);
3358
3359 __ xorl(tmp, -1);
3360
3361 // Restore previously spilled arguments
3362 __ movptr (dst, Address(rsp, 0*BytesPerWord));
3363 __ movptr (dst_pos, Address(rsp, 1*BytesPerWord));
3364 __ movptr (length, Address(rsp, 2*BytesPerWord));
3365 __ movptr (src_pos, Address(rsp, 3*BytesPerWord));
3366 __ movptr (src, Address(rsp, 4*BytesPerWord));
3367
3368
3369 __ subl(length, tmp);
3370 __ addl(src_pos, tmp);
3371 __ addl(dst_pos, tmp);
3372 }
3373
3374 __ jmp(*stub->entry());
3375
3376 __ bind(cont);
3377 __ pop(dst);
3378 __ pop(src);
3379 }
3380 }
3381
3382 #ifdef ASSERT
3383 if (basic_type != T_OBJECT || !(flags & LIR_OpArrayCopy::type_check)) {
3384 // Sanity check the known type with the incoming class. For the
3385 // primitive case the types must match exactly with src.klass and
3386 // dst.klass each exactly matching the default type. For the
3387 // object array case, if no type check is needed then either the
3388 // dst type is exactly the expected type and the src type is a
3389 // subtype which we can't check or src is the same array as dst
3390 // but not necessarily exactly of type default_type.
3391 Label known_ok, halt;
3392 __ mov_metadata(tmp, default_type->constant_encoding());
3393 #ifdef _LP64
3394 if (UseCompressedClassPointers) {
3395 __ encode_klass_not_null(tmp);
3396 }
3397 #endif
3398
3399 if (basic_type != T_OBJECT) {
3400
3401 if (UseCompressedClassPointers) __ cmpl(tmp, dst_klass_addr);
3402 else __ cmpptr(tmp, dst_klass_addr);
3403 __ jcc(Assembler::notEqual, halt);
3404 if (UseCompressedClassPointers) __ cmpl(tmp, src_klass_addr);
3405 else __ cmpptr(tmp, src_klass_addr);
3406 __ jcc(Assembler::equal, known_ok);
3407 } else {
3408 if (UseCompressedClassPointers) __ cmpl(tmp, dst_klass_addr);
3409 else __ cmpptr(tmp, dst_klass_addr);
3410 __ jcc(Assembler::equal, known_ok);
3411 __ cmpptr(src, dst);
3412 __ jcc(Assembler::equal, known_ok);
3413 }
3414 __ bind(halt);
3415 __ stop("incorrect type information in arraycopy");
3416 __ bind(known_ok);
3417 }
3418 #endif
3419
3420 #ifndef PRODUCT
3421 if (PrintC1Statistics) {
3422 __ incrementl(ExternalAddress(Runtime1::arraycopy_count_address(basic_type)));
3423 }
3424 #endif
3425
3426 #ifdef _LP64
3427 assert_different_registers(c_rarg0, dst, dst_pos, length);
3428 __ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3429 assert_different_registers(c_rarg1, length);
3430 __ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3431 __ mov(c_rarg2, length);
3432
3433 #else
3434 __ lea(tmp, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3435 store_parameter(tmp, 0);
3436 __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3437 store_parameter(tmp, 1);
3438 store_parameter(length, 2);
3439 #endif // _LP64
3440
3441 bool disjoint = (flags & LIR_OpArrayCopy::overlapping) == 0;
3442 bool aligned = (flags & LIR_OpArrayCopy::unaligned) == 0;
3443 const char *name;
3444 address entry = StubRoutines::select_arraycopy_function(basic_type, aligned, disjoint, name, false);
3445 __ call_VM_leaf(entry, 0);
3446
3447 __ bind(*stub->continuation());
3448 }
3449
3450 void LIR_Assembler::emit_updatecrc32(LIR_OpUpdateCRC32* op) {
3451 assert(op->crc()->is_single_cpu(), "crc must be register");
3452 assert(op->val()->is_single_cpu(), "byte value must be register");
3453 assert(op->result_opr()->is_single_cpu(), "result must be register");
3454 Register crc = op->crc()->as_register();
3455 Register val = op->val()->as_register();
3456 Register res = op->result_opr()->as_register();
3457
3458 assert_different_registers(val, crc, res);
3459
3460 __ lea(res, ExternalAddress(StubRoutines::crc_table_addr()));
3461 __ notl(crc); // ~crc
3462 __ update_byte_crc32(crc, val, res);
3463 __ notl(crc); // ~crc
3464 __ mov(res, crc);
3465 }
3466
3467 void LIR_Assembler::emit_lock(LIR_OpLock* op) {
3468 Register obj = op->obj_opr()->as_register(); // may not be an oop
3469 Register hdr = op->hdr_opr()->as_register();
3470 Register lock = op->lock_opr()->as_register();
3471 if (!UseFastLocking) {
3472 __ jmp(*op->stub()->entry());
3473 } else if (op->code() == lir_lock) {
3474 Register scratch = noreg;
3475 if (UseBiasedLocking) {
3476 scratch = op->scratch_opr()->as_register();
3477 }
3478 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
3479 // add debug info for NullPointerException only if one is possible
3480 int null_check_offset = __ lock_object(hdr, obj, lock, scratch, *op->stub()->entry());
3481 if (op->info() != NULL) {
3482 add_debug_info_for_null_check(null_check_offset, op->info());
3483 }
3484 // done
3485 } else if (op->code() == lir_unlock) {
3486 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
3487 __ unlock_object(hdr, obj, lock, *op->stub()->entry());
3488 } else {
3489 Unimplemented();
3490 }
3491 __ bind(*op->stub()->continuation());
3492 }
3493
3494
3495 void LIR_Assembler::emit_profile_call(LIR_OpProfileCall* op) {
3496 ciMethod* method = op->profiled_method();
3497 int bci = op->profiled_bci();
3498 ciMethod* callee = op->profiled_callee();
3499
3500 // Update counter for all call types
3501 ciMethodData* md = method->method_data_or_null();
3502 assert(md != NULL, "Sanity");
3503 ciProfileData* data = md->bci_to_data(bci);
3504 assert(data != NULL && data->is_CounterData(), "need CounterData for calls");
3505 assert(op->mdo()->is_single_cpu(), "mdo must be allocated");
3506 Register mdo = op->mdo()->as_register();
3507 __ mov_metadata(mdo, md->constant_encoding());
3508 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
3509 // Perform additional virtual call profiling for invokevirtual and
3510 // invokeinterface bytecodes
3511 if (op->should_profile_receiver_type()) {
3512 assert(op->recv()->is_single_cpu(), "recv must be allocated");
3513 Register recv = op->recv()->as_register();
3514 assert_different_registers(mdo, recv);
3515 assert(data->is_VirtualCallData(), "need VirtualCallData for virtual calls");
3516 ciKlass* known_klass = op->known_holder();
3517 if (C1OptimizeVirtualCallProfiling && known_klass != NULL) {
3518 // We know the type that will be seen at this call site; we can
3519 // statically update the MethodData* rather than needing to do
3520 // dynamic tests on the receiver type
3521
3522 // NOTE: we should probably put a lock around this search to
3523 // avoid collisions by concurrent compilations
3524 ciVirtualCallData* vc_data = (ciVirtualCallData*) data;
3525 uint i;
3526 for (i = 0; i < VirtualCallData::row_limit(); i++) {
3527 ciKlass* receiver = vc_data->receiver(i);
3528 if (known_klass->equals(receiver)) {
3529 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i)));
3530 __ addptr(data_addr, DataLayout::counter_increment);
3531 return;
3532 }
3533 }
3534
3535 // Receiver type not found in profile data; select an empty slot
3536
3537 // Note that this is less efficient than it should be because it
3538 // always does a write to the receiver part of the
3539 // VirtualCallData rather than just the first time
3540 for (i = 0; i < VirtualCallData::row_limit(); i++) {
3541 ciKlass* receiver = vc_data->receiver(i);
3542 if (receiver == NULL) {
3543 Address recv_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_offset(i)));
3544 __ mov_metadata(recv_addr, known_klass->constant_encoding());
3545 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i)));
3546 __ addptr(data_addr, DataLayout::counter_increment);
3547 return;
3548 }
3549 }
3550 } else {
3551 __ load_klass(recv, recv);
3552 Label update_done;
3553 type_profile_helper(mdo, md, data, recv, &update_done);
3554 // Receiver did not match any saved receiver and there is no empty row for it.
3555 // Increment total counter to indicate polymorphic case.
3556 __ addptr(counter_addr, DataLayout::counter_increment);
3557
3558 __ bind(update_done);
3559 }
3560 } else {
3561 // Static call
3562 __ addptr(counter_addr, DataLayout::counter_increment);
3563 }
3564 }
3565
3566 void LIR_Assembler::emit_profile_type(LIR_OpProfileType* op) {
3567 Register obj = op->obj()->as_register();
3568 Register tmp = op->tmp()->as_pointer_register();
3569 Address mdo_addr = as_Address(op->mdp()->as_address_ptr());
3570 ciKlass* exact_klass = op->exact_klass();
3571 intptr_t current_klass = op->current_klass();
3572 bool not_null = op->not_null();
3573 bool no_conflict = op->no_conflict();
3574
3575 Label update, next, none;
3576
3577 bool do_null = !not_null;
3578 bool exact_klass_set = exact_klass != NULL && ciTypeEntries::valid_ciklass(current_klass) == exact_klass;
3579 bool do_update = !TypeEntries::is_type_unknown(current_klass) && !exact_klass_set;
3580
3581 assert(do_null || do_update, "why are we here?");
3582 assert(!TypeEntries::was_null_seen(current_klass) || do_update, "why are we here?");
3583
3584 __ verify_oop(obj);
3585
3586 if (tmp != obj) {
3587 __ mov(tmp, obj);
3588 }
3589 if (do_null) {
3590 __ testptr(tmp, tmp);
3591 __ jccb(Assembler::notZero, update);
3592 if (!TypeEntries::was_null_seen(current_klass)) {
3593 __ orptr(mdo_addr, TypeEntries::null_seen);
3594 }
3595 if (do_update) {
3596 #ifndef ASSERT
3597 __ jmpb(next);
3598 }
3599 #else
3600 __ jmp(next);
3601 }
3602 } else {
3603 __ testptr(tmp, tmp);
3604 __ jccb(Assembler::notZero, update);
3605 __ stop("unexpect null obj");
3606 #endif
3607 }
3608
3609 __ bind(update);
3610
3611 if (do_update) {
3612 #ifdef ASSERT
3613 if (exact_klass != NULL) {
3614 Label ok;
3615 __ load_klass(tmp, tmp);
3616 __ push(tmp);
3617 __ mov_metadata(tmp, exact_klass->constant_encoding());
3618 __ cmpptr(tmp, Address(rsp, 0));
3619 __ jccb(Assembler::equal, ok);
3620 __ stop("exact klass and actual klass differ");
3621 __ bind(ok);
3622 __ pop(tmp);
3623 }
3624 #endif
3625 if (!no_conflict) {
3626 if (exact_klass == NULL || TypeEntries::is_type_none(current_klass)) {
3627 if (exact_klass != NULL) {
3628 __ mov_metadata(tmp, exact_klass->constant_encoding());
3629 } else {
3630 __ load_klass(tmp, tmp);
3631 }
3632
3633 __ xorptr(tmp, mdo_addr);
3634 __ testptr(tmp, TypeEntries::type_klass_mask);
3635 // klass seen before, nothing to do. The unknown bit may have been
3636 // set already but no need to check.
3637 __ jccb(Assembler::zero, next);
3638
3639 __ testptr(tmp, TypeEntries::type_unknown);
3640 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
3641
3642 if (TypeEntries::is_type_none(current_klass)) {
3643 __ cmpptr(mdo_addr, 0);
3644 __ jccb(Assembler::equal, none);
3645 __ cmpptr(mdo_addr, TypeEntries::null_seen);
3646 __ jccb(Assembler::equal, none);
3647 // There is a chance that the checks above (re-reading profiling
3648 // data from memory) fail if another thread has just set the
3649 // profiling to this obj's klass
3650 __ xorptr(tmp, mdo_addr);
3651 __ testptr(tmp, TypeEntries::type_klass_mask);
3652 __ jccb(Assembler::zero, next);
3653 }
3654 } else {
3655 assert(ciTypeEntries::valid_ciklass(current_klass) != NULL &&
3656 ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "conflict only");
3657
3658 __ movptr(tmp, mdo_addr);
3659 __ testptr(tmp, TypeEntries::type_unknown);
3660 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
3661 }
3662
3663 // different than before. Cannot keep accurate profile.
3664 __ orptr(mdo_addr, TypeEntries::type_unknown);
3665
3666 if (TypeEntries::is_type_none(current_klass)) {
3667 __ jmpb(next);
3668
3669 __ bind(none);
3670 // first time here. Set profile type.
3671 __ movptr(mdo_addr, tmp);
3672 }
3673 } else {
3674 // There's a single possible klass at this profile point
3675 assert(exact_klass != NULL, "should be");
3676 if (TypeEntries::is_type_none(current_klass)) {
3677 __ mov_metadata(tmp, exact_klass->constant_encoding());
3678 __ xorptr(tmp, mdo_addr);
3679 __ testptr(tmp, TypeEntries::type_klass_mask);
3680 #ifdef ASSERT
3681 __ jcc(Assembler::zero, next);
3682
3683 {
3684 Label ok;
3685 __ push(tmp);
3686 __ cmpptr(mdo_addr, 0);
3687 __ jcc(Assembler::equal, ok);
3688 __ cmpptr(mdo_addr, TypeEntries::null_seen);
3689 __ jcc(Assembler::equal, ok);
3690 // may have been set by another thread
3691 __ mov_metadata(tmp, exact_klass->constant_encoding());
3692 __ xorptr(tmp, mdo_addr);
3693 __ testptr(tmp, TypeEntries::type_mask);
3694 __ jcc(Assembler::zero, ok);
3695
3696 __ stop("unexpected profiling mismatch");
3697 __ bind(ok);
3698 __ pop(tmp);
3699 }
3700 #else
3701 __ jccb(Assembler::zero, next);
3702 #endif
3703 // first time here. Set profile type.
3704 __ movptr(mdo_addr, tmp);
3705 } else {
3706 assert(ciTypeEntries::valid_ciklass(current_klass) != NULL &&
3707 ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "inconsistent");
3708
3709 __ movptr(tmp, mdo_addr);
3710 __ testptr(tmp, TypeEntries::type_unknown);
3711 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
3712
3713 __ orptr(mdo_addr, TypeEntries::type_unknown);
3714 }
3715 }
3716
3717 __ bind(next);
3718 }
3719 }
3720
3721 void LIR_Assembler::emit_delay(LIR_OpDelay*) {
3722 Unimplemented();
3723 }
3724
3725
3726 void LIR_Assembler::monitor_address(int monitor_no, LIR_Opr dst) {
3727 __ lea(dst->as_register(), frame_map()->address_for_monitor_lock(monitor_no));
3728 }
3729
3730
3731 void LIR_Assembler::align_backward_branch_target() {
3732 __ align(BytesPerWord);
3733 }
3734
3735
3736 void LIR_Assembler::negate(LIR_Opr left, LIR_Opr dest) {
3737 if (left->is_single_cpu()) {
3738 __ negl(left->as_register());
3739 move_regs(left->as_register(), dest->as_register());
3740
3741 } else if (left->is_double_cpu()) {
3742 Register lo = left->as_register_lo();
3743 #ifdef _LP64
3744 Register dst = dest->as_register_lo();
3745 __ movptr(dst, lo);
3746 __ negptr(dst);
3747 #else
3748 Register hi = left->as_register_hi();
3749 __ lneg(hi, lo);
3750 if (dest->as_register_lo() == hi) {
3751 assert(dest->as_register_hi() != lo, "destroying register");
3752 move_regs(hi, dest->as_register_hi());
3753 move_regs(lo, dest->as_register_lo());
3754 } else {
3755 move_regs(lo, dest->as_register_lo());
3756 move_regs(hi, dest->as_register_hi());
3757 }
3758 #endif // _LP64
3759
3760 } else if (dest->is_single_xmm()) {
3761 if (left->as_xmm_float_reg() != dest->as_xmm_float_reg()) {
3762 __ movflt(dest->as_xmm_float_reg(), left->as_xmm_float_reg());
3763 }
3764 if (UseAVX > 0) {
3765 __ vnegatess(dest->as_xmm_float_reg(), dest->as_xmm_float_reg(),
3766 ExternalAddress((address)float_signflip_pool));
3767 } else {
3768 __ xorps(dest->as_xmm_float_reg(),
3769 ExternalAddress((address)float_signflip_pool));
3770 }
3771 } else if (dest->is_double_xmm()) {
3772 if (left->as_xmm_double_reg() != dest->as_xmm_double_reg()) {
3773 __ movdbl(dest->as_xmm_double_reg(), left->as_xmm_double_reg());
3774 }
3775 if (UseAVX > 0) {
3776 __ vnegatesd(dest->as_xmm_double_reg(), dest->as_xmm_double_reg(),
3777 ExternalAddress((address)double_signflip_pool));
3778 } else {
3779 __ xorpd(dest->as_xmm_double_reg(),
3780 ExternalAddress((address)double_signflip_pool));
3781 }
3782 } else if (left->is_single_fpu() || left->is_double_fpu()) {
3783 assert(left->fpu() == 0, "arg must be on TOS");
3784 assert(dest->fpu() == 0, "dest must be TOS");
3785 __ fchs();
3786
3787 } else {
3788 ShouldNotReachHere();
3789 }
3790 }
3791
3792
3793 void LIR_Assembler::leal(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) {
3794 assert(src->is_address(), "must be an address");
3795 assert(dest->is_register(), "must be a register");
3796
3797 PatchingStub* patch = NULL;
3798 if (patch_code != lir_patch_none) {
3799 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
3800 }
3801
3802 Register reg = dest->as_pointer_register();
3803 LIR_Address* addr = src->as_address_ptr();
3804 __ lea(reg, as_Address(addr));
3805
3806 if (patch != NULL) {
3807 patching_epilog(patch, patch_code, addr->base()->as_register(), info);
3808 }
3809 }
3810
3811
3812
3813 void LIR_Assembler::rt_call(LIR_Opr result, address dest, const LIR_OprList* args, LIR_Opr tmp, CodeEmitInfo* info) {
3814 assert(!tmp->is_valid(), "don't need temporary");
3815 __ call(RuntimeAddress(dest));
3816 if (info != NULL) {
3817 add_call_info_here(info);
3818 }
3819 }
3820
3821
3822 void LIR_Assembler::volatile_move_op(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info) {
3823 assert(type == T_LONG, "only for volatile long fields");
3824
3825 if (info != NULL) {
3826 add_debug_info_for_null_check_here(info);
3827 }
3828
3829 if (src->is_double_xmm()) {
3830 if (dest->is_double_cpu()) {
3831 #ifdef _LP64
3832 __ movdq(dest->as_register_lo(), src->as_xmm_double_reg());
3833 #else
3834 __ movdl(dest->as_register_lo(), src->as_xmm_double_reg());
3835 __ psrlq(src->as_xmm_double_reg(), 32);
3836 __ movdl(dest->as_register_hi(), src->as_xmm_double_reg());
3837 #endif // _LP64
3838 } else if (dest->is_double_stack()) {
3839 __ movdbl(frame_map()->address_for_slot(dest->double_stack_ix()), src->as_xmm_double_reg());
3840 } else if (dest->is_address()) {
3841 __ movdbl(as_Address(dest->as_address_ptr()), src->as_xmm_double_reg());
3842 } else {
3843 ShouldNotReachHere();
3844 }
3845
3846 } else if (dest->is_double_xmm()) {
3847 if (src->is_double_stack()) {
3848 __ movdbl(dest->as_xmm_double_reg(), frame_map()->address_for_slot(src->double_stack_ix()));
3849 } else if (src->is_address()) {
3850 __ movdbl(dest->as_xmm_double_reg(), as_Address(src->as_address_ptr()));
3851 } else {
3852 ShouldNotReachHere();
3853 }
3854
3855 } else if (src->is_double_fpu()) {
3856 assert(src->fpu_regnrLo() == 0, "must be TOS");
3857 if (dest->is_double_stack()) {
3858 __ fistp_d(frame_map()->address_for_slot(dest->double_stack_ix()));
3859 } else if (dest->is_address()) {
3860 __ fistp_d(as_Address(dest->as_address_ptr()));
3861 } else {
3862 ShouldNotReachHere();
3863 }
3864
3865 } else if (dest->is_double_fpu()) {
3866 assert(dest->fpu_regnrLo() == 0, "must be TOS");
3867 if (src->is_double_stack()) {
3868 __ fild_d(frame_map()->address_for_slot(src->double_stack_ix()));
3869 } else if (src->is_address()) {
3870 __ fild_d(as_Address(src->as_address_ptr()));
3871 } else {
3872 ShouldNotReachHere();
3873 }
3874 } else {
3875 ShouldNotReachHere();
3876 }
3877 }
3878
3879 #ifdef ASSERT
3880 // emit run-time assertion
3881 void LIR_Assembler::emit_assert(LIR_OpAssert* op) {
3882 assert(op->code() == lir_assert, "must be");
3883
3884 if (op->in_opr1()->is_valid()) {
3885 assert(op->in_opr2()->is_valid(), "both operands must be valid");
3886 comp_op(op->condition(), op->in_opr1(), op->in_opr2(), op);
3887 } else {
3888 assert(op->in_opr2()->is_illegal(), "both operands must be illegal");
3889 assert(op->condition() == lir_cond_always, "no other conditions allowed");
3890 }
3891
3892 Label ok;
3893 if (op->condition() != lir_cond_always) {
3894 Assembler::Condition acond = Assembler::zero;
3895 switch (op->condition()) {
3896 case lir_cond_equal: acond = Assembler::equal; break;
3897 case lir_cond_notEqual: acond = Assembler::notEqual; break;
3898 case lir_cond_less: acond = Assembler::less; break;
3899 case lir_cond_lessEqual: acond = Assembler::lessEqual; break;
3900 case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break;
3901 case lir_cond_greater: acond = Assembler::greater; break;
3902 case lir_cond_belowEqual: acond = Assembler::belowEqual; break;
3903 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; break;
3904 default: ShouldNotReachHere();
3905 }
3906 __ jcc(acond, ok);
3907 }
3908 if (op->halt()) {
3909 const char* str = __ code_string(op->msg());
3910 __ stop(str);
3911 } else {
3912 breakpoint();
3913 }
3914 __ bind(ok);
3915 }
3916 #endif
3917
3918 void LIR_Assembler::membar() {
3919 // QQQ sparc TSO uses this,
3920 __ membar( Assembler::Membar_mask_bits(Assembler::StoreLoad));
3921 }
3922
3923 void LIR_Assembler::membar_acquire() {
3924 // No x86 machines currently require load fences
3925 }
3926
3927 void LIR_Assembler::membar_release() {
3928 // No x86 machines currently require store fences
3929 }
3930
3931 void LIR_Assembler::membar_loadload() {
3932 // no-op
3933 //__ membar(Assembler::Membar_mask_bits(Assembler::loadload));
3934 }
3935
3936 void LIR_Assembler::membar_storestore() {
3937 // no-op
3938 //__ membar(Assembler::Membar_mask_bits(Assembler::storestore));
3939 }
3940
3941 void LIR_Assembler::membar_loadstore() {
3942 // no-op
3943 //__ membar(Assembler::Membar_mask_bits(Assembler::loadstore));
3944 }
3945
3946 void LIR_Assembler::membar_storeload() {
3947 __ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad));
3948 }
3949
3950 void LIR_Assembler::on_spin_wait() {
3951 __ pause ();
3952 }
3953
3954 void LIR_Assembler::get_thread(LIR_Opr result_reg) {
3955 assert(result_reg->is_register(), "check");
3956 #ifdef _LP64
3957 // __ get_thread(result_reg->as_register_lo());
3958 __ mov(result_reg->as_register(), r15_thread);
3959 #else
3960 __ get_thread(result_reg->as_register());
3961 #endif // _LP64
3962 }
3963
3964
3965 void LIR_Assembler::peephole(LIR_List*) {
3966 // do nothing for now
3967 }
3968
3969 void LIR_Assembler::atomic_op(LIR_Code code, LIR_Opr src, LIR_Opr data, LIR_Opr dest, LIR_Opr tmp) {
3970 assert(data == dest, "xchg/xadd uses only 2 operands");
3971
3972 if (data->type() == T_INT) {
3973 if (code == lir_xadd) {
3974 if (os::is_MP()) {
3975 __ lock();
3976 }
3977 __ xaddl(as_Address(src->as_address_ptr()), data->as_register());
3978 } else {
3979 __ xchgl(data->as_register(), as_Address(src->as_address_ptr()));
3980 }
3981 } else if (data->is_oop()) {
3982 assert (code == lir_xchg, "xadd for oops");
3983 Register obj = data->as_register();
3984 #ifdef _LP64
3985 if (UseCompressedOops) {
3986 __ encode_heap_oop(obj);
3987 __ xchgl(obj, as_Address(src->as_address_ptr()));
3988 __ decode_heap_oop(obj);
3989 } else {
3990 __ xchgptr(obj, as_Address(src->as_address_ptr()));
3991 }
3992 #else
3993 __ xchgl(obj, as_Address(src->as_address_ptr()));
3994 #endif
3995 } else if (data->type() == T_LONG) {
3996 #ifdef _LP64
3997 assert(data->as_register_lo() == data->as_register_hi(), "should be a single register");
3998 if (code == lir_xadd) {
3999 if (os::is_MP()) {
4000 __ lock();
4001 }
4002 __ xaddq(as_Address(src->as_address_ptr()), data->as_register_lo());
4003 } else {
4004 __ xchgq(data->as_register_lo(), as_Address(src->as_address_ptr()));
4005 }
4006 #else
4007 ShouldNotReachHere();
4008 #endif
4009 } else {
4010 ShouldNotReachHere();
4011 }
4012 }
4013
4014 #undef __