1 /*
2 * Copyright (c) 2000, 2013, 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_interface/collectedHeap.hpp"
36 #include "memory/barrierSet.hpp"
37 #include "memory/cardTableModRefBS.hpp"
38 #include "nativeInst_x86.hpp"
39 #include "oops/objArrayKlass.hpp"
40 #include "runtime/sharedRuntime.hpp"
41 #include "vmreg_x86.inline.hpp"
42 #include "utilities/macros.hpp"
43 #if INCLUDE_ALL_GCS
44 #include "shenandoahBarrierSetAssembler_x86.hpp"
45 #endif
46
47 // These masks are used to provide 128-bit aligned bitmasks to the XMM
48 // instructions, to allow sign-masking or sign-bit flipping. They allow
49 // fast versions of NegF/NegD and AbsF/AbsD.
50
51 // Note: 'double' and 'long long' have 32-bits alignment on x86.
52 static jlong* double_quadword(jlong *adr, jlong lo, jlong hi) {
53 // Use the expression (adr)&(~0xF) to provide 128-bits aligned address
54 // of 128-bits operands for SSE instructions.
55 jlong *operand = (jlong*)(((intptr_t)adr) & ((intptr_t)(~0xF)));
56 // Store the value to a 128-bits operand.
57 operand[0] = lo;
58 operand[1] = hi;
59 return operand;
60 }
61
62 // Buffer for 128-bits masks used by SSE instructions.
63 static jlong fp_signmask_pool[(4+1)*2]; // 4*128bits(data) + 128bits(alignment)
64
65 // Static initialization during VM startup.
66 static jlong *float_signmask_pool = double_quadword(&fp_signmask_pool[1*2], CONST64(0x7FFFFFFF7FFFFFFF), CONST64(0x7FFFFFFF7FFFFFFF));
67 static jlong *double_signmask_pool = double_quadword(&fp_signmask_pool[2*2], CONST64(0x7FFFFFFFFFFFFFFF), CONST64(0x7FFFFFFFFFFFFFFF));
68 static jlong *float_signflip_pool = double_quadword(&fp_signmask_pool[3*2], CONST64(0x8000000080000000), CONST64(0x8000000080000000));
69 static jlong *double_signflip_pool = double_quadword(&fp_signmask_pool[4*2], CONST64(0x8000000000000000), CONST64(0x8000000000000000));
70
71
72
73 NEEDS_CLEANUP // remove this definitions ?
74 const Register IC_Klass = rax; // where the IC klass is cached
75 const Register SYNC_header = rax; // synchronization header
76 const Register SHIFT_count = rcx; // where count for shift operations must be
77
78 #define __ _masm->
79
80
81 static void select_different_registers(Register preserve,
82 Register extra,
83 Register &tmp1,
84 Register &tmp2) {
85 if (tmp1 == preserve) {
86 assert_different_registers(tmp1, tmp2, extra);
87 tmp1 = extra;
88 } else if (tmp2 == preserve) {
89 assert_different_registers(tmp1, tmp2, extra);
90 tmp2 = extra;
91 }
92 assert_different_registers(preserve, tmp1, tmp2);
93 }
94
95
96
97 static void select_different_registers(Register preserve,
98 Register extra,
99 Register &tmp1,
100 Register &tmp2,
101 Register &tmp3) {
102 if (tmp1 == preserve) {
103 assert_different_registers(tmp1, tmp2, tmp3, extra);
104 tmp1 = extra;
105 } else if (tmp2 == preserve) {
106 assert_different_registers(tmp1, tmp2, tmp3, extra);
107 tmp2 = extra;
108 } else if (tmp3 == preserve) {
109 assert_different_registers(tmp1, tmp2, tmp3, extra);
110 tmp3 = extra;
111 }
112 assert_different_registers(preserve, tmp1, tmp2, tmp3);
113 }
114
115
116
117 bool LIR_Assembler::is_small_constant(LIR_Opr opr) {
118 if (opr->is_constant()) {
119 LIR_Const* constant = opr->as_constant_ptr();
120 switch (constant->type()) {
121 case T_INT: {
122 return true;
123 }
124
125 default:
126 return false;
127 }
128 }
129 return false;
130 }
131
132
133 LIR_Opr LIR_Assembler::receiverOpr() {
134 return FrameMap::receiver_opr;
135 }
136
137 LIR_Opr LIR_Assembler::osrBufferPointer() {
138 return FrameMap::as_pointer_opr(receiverOpr()->as_register());
139 }
140
141 //--------------fpu register translations-----------------------
142
143
144 address LIR_Assembler::float_constant(float f) {
145 address const_addr = __ float_constant(f);
146 if (const_addr == NULL) {
147 bailout("const section overflow");
148 return __ code()->consts()->start();
149 } else {
150 return const_addr;
151 }
152 }
153
154
155 address LIR_Assembler::double_constant(double d) {
156 address const_addr = __ double_constant(d);
157 if (const_addr == NULL) {
158 bailout("const section overflow");
159 return __ code()->consts()->start();
160 } else {
161 return const_addr;
162 }
163 }
164
165
166 void LIR_Assembler::set_24bit_FPU() {
167 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_24()));
168 }
169
170 void LIR_Assembler::reset_FPU() {
171 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
172 }
173
174 void LIR_Assembler::fpop() {
175 __ fpop();
176 }
177
178 void LIR_Assembler::fxch(int i) {
179 __ fxch(i);
180 }
181
182 void LIR_Assembler::fld(int i) {
183 __ fld_s(i);
184 }
185
186 void LIR_Assembler::ffree(int i) {
187 __ ffree(i);
188 }
189
190 void LIR_Assembler::breakpoint() {
191 __ int3();
192 }
193
194 void LIR_Assembler::push(LIR_Opr opr) {
195 if (opr->is_single_cpu()) {
196 __ push_reg(opr->as_register());
197 } else if (opr->is_double_cpu()) {
198 NOT_LP64(__ push_reg(opr->as_register_hi()));
199 __ push_reg(opr->as_register_lo());
200 } else if (opr->is_stack()) {
201 __ push_addr(frame_map()->address_for_slot(opr->single_stack_ix()));
202 } else if (opr->is_constant()) {
203 LIR_Const* const_opr = opr->as_constant_ptr();
204 if (const_opr->type() == T_OBJECT) {
205 __ push_oop(const_opr->as_jobject());
206 } else if (const_opr->type() == T_INT) {
207 __ push_jint(const_opr->as_jint());
208 } else {
209 ShouldNotReachHere();
210 }
211
212 } else {
213 ShouldNotReachHere();
214 }
215 }
216
217 void LIR_Assembler::pop(LIR_Opr opr) {
218 if (opr->is_single_cpu()) {
219 __ pop_reg(opr->as_register());
220 } else {
221 ShouldNotReachHere();
222 }
223 }
224
225 bool LIR_Assembler::is_literal_address(LIR_Address* addr) {
226 return addr->base()->is_illegal() && addr->index()->is_illegal();
227 }
228
229 //-------------------------------------------
230
231 Address LIR_Assembler::as_Address(LIR_Address* addr) {
232 return as_Address(addr, rscratch1);
233 }
234
235 Address LIR_Assembler::as_Address(LIR_Address* addr, Register tmp) {
236 if (addr->base()->is_illegal()) {
237 assert(addr->index()->is_illegal(), "must be illegal too");
238 AddressLiteral laddr((address)addr->disp(), relocInfo::none);
239 if (! __ reachable(laddr)) {
240 __ movptr(tmp, laddr.addr());
241 Address res(tmp, 0);
242 return res;
243 } else {
244 return __ as_Address(laddr);
245 }
246 }
247
248 Register base = addr->base()->as_pointer_register();
249
250 if (addr->index()->is_illegal()) {
251 return Address( base, addr->disp());
252 } else if (addr->index()->is_cpu_register()) {
253 Register index = addr->index()->as_pointer_register();
254 return Address(base, index, (Address::ScaleFactor) addr->scale(), addr->disp());
255 } else if (addr->index()->is_constant()) {
256 intptr_t addr_offset = (addr->index()->as_constant_ptr()->as_jint() << addr->scale()) + addr->disp();
257 assert(Assembler::is_simm32(addr_offset), "must be");
258
259 return Address(base, addr_offset);
260 } else {
261 Unimplemented();
262 return Address();
263 }
264 }
265
266
267 Address LIR_Assembler::as_Address_hi(LIR_Address* addr) {
268 Address base = as_Address(addr);
269 return Address(base._base, base._index, base._scale, base._disp + BytesPerWord);
270 }
271
272
273 Address LIR_Assembler::as_Address_lo(LIR_Address* addr) {
274 return as_Address(addr);
275 }
276
277
278 void LIR_Assembler::osr_entry() {
279 offsets()->set_value(CodeOffsets::OSR_Entry, code_offset());
280 BlockBegin* osr_entry = compilation()->hir()->osr_entry();
281 ValueStack* entry_state = osr_entry->state();
282 int number_of_locks = entry_state->locks_size();
283
284 // we jump here if osr happens with the interpreter
285 // state set up to continue at the beginning of the
286 // loop that triggered osr - in particular, we have
287 // the following registers setup:
288 //
289 // rcx: osr buffer
290 //
291
292 // build frame
293 ciMethod* m = compilation()->method();
294 __ build_frame(initial_frame_size_in_bytes(), bang_size_in_bytes());
295
296 // OSR buffer is
297 //
298 // locals[nlocals-1..0]
299 // monitors[0..number_of_locks]
300 //
301 // locals is a direct copy of the interpreter frame so in the osr buffer
302 // so first slot in the local array is the last local from the interpreter
303 // and last slot is local[0] (receiver) from the interpreter
304 //
305 // Similarly with locks. The first lock slot in the osr buffer is the nth lock
306 // from the interpreter frame, the nth lock slot in the osr buffer is 0th lock
307 // in the interpreter frame (the method lock if a sync method)
308
309 // Initialize monitors in the compiled activation.
310 // rcx: pointer to osr buffer
311 //
312 // All other registers are dead at this point and the locals will be
313 // copied into place by code emitted in the IR.
314
315 Register OSR_buf = osrBufferPointer()->as_pointer_register();
316 { assert(frame::interpreter_frame_monitor_size() == BasicObjectLock::size(), "adjust code below");
317 int monitor_offset = BytesPerWord * method()->max_locals() +
318 (2 * BytesPerWord) * (number_of_locks - 1);
319 // SharedRuntime::OSR_migration_begin() packs BasicObjectLocks in
320 // the OSR buffer using 2 word entries: first the lock and then
321 // the oop.
322 for (int i = 0; i < number_of_locks; i++) {
323 int slot_offset = monitor_offset - ((i * 2) * BytesPerWord);
324 #ifdef ASSERT
325 // verify the interpreter's monitor has a non-null object
326 {
327 Label L;
328 __ cmpptr(Address(OSR_buf, slot_offset + 1*BytesPerWord), (int32_t)NULL_WORD);
329 __ jcc(Assembler::notZero, L);
330 __ stop("locked object is NULL");
331 __ bind(L);
332 }
333 #endif
334 __ movptr(rbx, Address(OSR_buf, slot_offset + 0));
335 __ movptr(frame_map()->address_for_monitor_lock(i), rbx);
336 __ movptr(rbx, Address(OSR_buf, slot_offset + 1*BytesPerWord));
337 __ movptr(frame_map()->address_for_monitor_object(i), rbx);
338 }
339 }
340 }
341
342
343 // inline cache check; done before the frame is built.
344 int LIR_Assembler::check_icache() {
345 Register receiver = FrameMap::receiver_opr->as_register();
346 Register ic_klass = IC_Klass;
347 const int ic_cmp_size = LP64_ONLY(10) NOT_LP64(9);
348 const bool do_post_padding = VerifyOops || UseCompressedClassPointers;
349 if (!do_post_padding) {
350 // insert some nops so that the verified entry point is aligned on CodeEntryAlignment
351 while ((__ offset() + ic_cmp_size) % CodeEntryAlignment != 0) {
352 __ nop();
353 }
354 }
355 int offset = __ offset();
356 __ inline_cache_check(receiver, IC_Klass);
357 assert(__ offset() % CodeEntryAlignment == 0 || do_post_padding, "alignment must be correct");
358 if (do_post_padding) {
359 // force alignment after the cache check.
360 // It's been verified to be aligned if !VerifyOops
361 __ align(CodeEntryAlignment);
362 }
363 return offset;
364 }
365
366
367 void LIR_Assembler::jobject2reg_with_patching(Register reg, CodeEmitInfo* info) {
368 jobject o = NULL;
369 PatchingStub* patch = new PatchingStub(_masm, patching_id(info));
370 __ movoop(reg, o);
371 patching_epilog(patch, lir_patch_normal, reg, info);
372 }
373
374 void LIR_Assembler::klass2reg_with_patching(Register reg, CodeEmitInfo* info) {
375 Metadata* o = NULL;
376 PatchingStub* patch = new PatchingStub(_masm, PatchingStub::load_klass_id);
377 __ mov_metadata(reg, o);
378 patching_epilog(patch, lir_patch_normal, reg, info);
379 }
380
381 // This specifies the rsp decrement needed to build the frame
382 int LIR_Assembler::initial_frame_size_in_bytes() const {
383 // if rounding, must let FrameMap know!
384
385 // The frame_map records size in slots (32bit word)
386
387 // subtract two words to account for return address and link
388 return (frame_map()->framesize() - (2*VMRegImpl::slots_per_word)) * VMRegImpl::stack_slot_size;
389 }
390
391
392 int LIR_Assembler::emit_exception_handler() {
393 // if the last instruction is a call (typically to do a throw which
394 // is coming at the end after block reordering) the return address
395 // must still point into the code area in order to avoid assertion
396 // failures when searching for the corresponding bci => add a nop
397 // (was bug 5/14/1999 - gri)
398 __ nop();
399
400 // generate code for exception handler
401 address handler_base = __ start_a_stub(exception_handler_size);
402 if (handler_base == NULL) {
403 // not enough space left for the handler
404 bailout("exception handler overflow");
405 return -1;
406 }
407
408 int offset = code_offset();
409
410 // the exception oop and pc are in rax, and rdx
411 // no other registers need to be preserved, so invalidate them
412 __ invalidate_registers(false, true, true, false, true, true);
413
414 // check that there is really an exception
415 __ verify_not_null_oop(rax);
416
417 // search an exception handler (rax: exception oop, rdx: throwing pc)
418 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::handle_exception_from_callee_id)));
419 __ should_not_reach_here();
420 guarantee(code_offset() - offset <= exception_handler_size, "overflow");
421 __ end_a_stub();
422
423 return offset;
424 }
425
426
427 // Emit the code to remove the frame from the stack in the exception
428 // unwind path.
429 int LIR_Assembler::emit_unwind_handler() {
430 #ifndef PRODUCT
431 if (CommentedAssembly) {
432 _masm->block_comment("Unwind handler");
433 }
434 #endif
435
436 int offset = code_offset();
437
438 // Fetch the exception from TLS and clear out exception related thread state
439 Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread);
440 NOT_LP64(__ get_thread(rsi));
441 __ movptr(rax, Address(thread, JavaThread::exception_oop_offset()));
442 __ movptr(Address(thread, JavaThread::exception_oop_offset()), (intptr_t)NULL_WORD);
443 __ movptr(Address(thread, JavaThread::exception_pc_offset()), (intptr_t)NULL_WORD);
444
445 __ bind(_unwind_handler_entry);
446 __ verify_not_null_oop(rax);
447 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
448 __ mov(rbx, rax); // Preserve the exception (rbx is always callee-saved)
449 }
450
451 // Preform needed unlocking
452 MonitorExitStub* stub = NULL;
453 if (method()->is_synchronized()) {
454 monitor_address(0, FrameMap::rax_opr);
455 stub = new MonitorExitStub(FrameMap::rax_opr, true, 0);
456 __ unlock_object(rdi, rsi, rax, *stub->entry());
457 __ bind(*stub->continuation());
458 }
459
460 if (compilation()->env()->dtrace_method_probes()) {
461 #ifdef _LP64
462 __ mov(rdi, r15_thread);
463 __ mov_metadata(rsi, method()->constant_encoding());
464 #else
465 __ get_thread(rax);
466 __ movptr(Address(rsp, 0), rax);
467 __ mov_metadata(Address(rsp, sizeof(void*)), method()->constant_encoding());
468 #endif
469 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit)));
470 }
471
472 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
473 __ mov(rax, rbx); // Restore the exception
474 }
475
476 // remove the activation and dispatch to the unwind handler
477 __ remove_frame(initial_frame_size_in_bytes());
478 __ jump(RuntimeAddress(Runtime1::entry_for(Runtime1::unwind_exception_id)));
479
480 // Emit the slow path assembly
481 if (stub != NULL) {
482 stub->emit_code(this);
483 }
484
485 return offset;
486 }
487
488
489 int LIR_Assembler::emit_deopt_handler() {
490 // if the last instruction is a call (typically to do a throw which
491 // is coming at the end after block reordering) the return address
492 // must still point into the code area in order to avoid assertion
493 // failures when searching for the corresponding bci => add a nop
494 // (was bug 5/14/1999 - gri)
495 __ nop();
496
497 // generate code for exception handler
498 address handler_base = __ start_a_stub(deopt_handler_size);
499 if (handler_base == NULL) {
500 // not enough space left for the handler
501 bailout("deopt handler overflow");
502 return -1;
503 }
504
505 int offset = code_offset();
506 InternalAddress here(__ pc());
507
508 __ pushptr(here.addr());
509 __ jump(RuntimeAddress(SharedRuntime::deopt_blob()->unpack()));
510 guarantee(code_offset() - offset <= deopt_handler_size, "overflow");
511 __ end_a_stub();
512
513 return offset;
514 }
515
516
517 // This is the fast version of java.lang.String.compare; it has not
518 // OSR-entry and therefore, we generate a slow version for OSR's
519 void LIR_Assembler::emit_string_compare(LIR_Opr arg0, LIR_Opr arg1, LIR_Opr dst, CodeEmitInfo* info) {
520 __ movptr (rbx, rcx); // receiver is in rcx
521 __ movptr (rax, arg1->as_register());
522
523 // Get addresses of first characters from both Strings
524 __ load_heap_oop(rsi, Address(rax, java_lang_String::value_offset_in_bytes()));
525 if (java_lang_String::has_offset_field()) {
526 __ movptr (rcx, Address(rax, java_lang_String::offset_offset_in_bytes()));
527 __ movl (rax, Address(rax, java_lang_String::count_offset_in_bytes()));
528 __ lea (rsi, Address(rsi, rcx, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR)));
529 } else {
530 __ movl (rax, Address(rsi, arrayOopDesc::length_offset_in_bytes()));
531 __ lea (rsi, Address(rsi, arrayOopDesc::base_offset_in_bytes(T_CHAR)));
532 }
533
534 // rbx, may be NULL
535 add_debug_info_for_null_check_here(info);
536 __ load_heap_oop(rdi, Address(rbx, java_lang_String::value_offset_in_bytes()));
537 if (java_lang_String::has_offset_field()) {
538 __ movptr (rcx, Address(rbx, java_lang_String::offset_offset_in_bytes()));
539 __ movl (rbx, Address(rbx, java_lang_String::count_offset_in_bytes()));
540 __ lea (rdi, Address(rdi, rcx, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR)));
541 } else {
542 __ movl (rbx, Address(rdi, arrayOopDesc::length_offset_in_bytes()));
543 __ lea (rdi, Address(rdi, arrayOopDesc::base_offset_in_bytes(T_CHAR)));
544 }
545
546 // compute minimum length (in rax) and difference of lengths (on top of stack)
547 __ mov (rcx, rbx);
548 __ subptr(rbx, rax); // subtract lengths
549 __ push (rbx); // result
550 __ cmov (Assembler::lessEqual, rax, rcx);
551
552 // is minimum length 0?
553 Label noLoop, haveResult;
554 __ testptr (rax, rax);
555 __ jcc (Assembler::zero, noLoop);
556
557 // compare first characters
558 __ load_unsigned_short(rcx, Address(rdi, 0));
559 __ load_unsigned_short(rbx, Address(rsi, 0));
560 __ subl(rcx, rbx);
561 __ jcc(Assembler::notZero, haveResult);
562 // starting loop
563 __ decrement(rax); // we already tested index: skip one
564 __ jcc(Assembler::zero, noLoop);
565
566 // set rsi.edi to the end of the arrays (arrays have same length)
567 // negate the index
568
569 __ lea(rsi, Address(rsi, rax, Address::times_2, type2aelembytes(T_CHAR)));
570 __ lea(rdi, Address(rdi, rax, Address::times_2, type2aelembytes(T_CHAR)));
571 __ negptr(rax);
572
573 // compare the strings in a loop
574
575 Label loop;
576 __ align(wordSize);
577 __ bind(loop);
578 __ load_unsigned_short(rcx, Address(rdi, rax, Address::times_2, 0));
579 __ load_unsigned_short(rbx, Address(rsi, rax, Address::times_2, 0));
580 __ subl(rcx, rbx);
581 __ jcc(Assembler::notZero, haveResult);
582 __ increment(rax);
583 __ jcc(Assembler::notZero, loop);
584
585 // strings are equal up to min length
586
587 __ bind(noLoop);
588 __ pop(rax);
589 return_op(LIR_OprFact::illegalOpr);
590
591 __ bind(haveResult);
592 // leave instruction is going to discard the TOS value
593 __ mov (rax, rcx); // result of call is in rax,
594 }
595
596
597 void LIR_Assembler::return_op(LIR_Opr result) {
598 assert(result->is_illegal() || !result->is_single_cpu() || result->as_register() == rax, "word returns are in rax,");
599 if (!result->is_illegal() && result->is_float_kind() && !result->is_xmm_register()) {
600 assert(result->fpu() == 0, "result must already be on TOS");
601 }
602
603 // Pop the stack before the safepoint code
604 __ remove_frame(initial_frame_size_in_bytes());
605
606 bool result_is_oop = result->is_valid() ? result->is_oop() : false;
607
608 // Note: we do not need to round double result; float result has the right precision
609 // the poll sets the condition code, but no data registers
610 AddressLiteral polling_page(os::get_polling_page() + (SafepointPollOffset % os::vm_page_size()),
611 relocInfo::poll_return_type);
612
613 if (Assembler::is_polling_page_far()) {
614 __ lea(rscratch1, polling_page);
615 __ relocate(relocInfo::poll_return_type);
616 __ testl(rax, Address(rscratch1, 0));
617 } else {
618 __ testl(rax, polling_page);
619 }
620 __ ret(0);
621 }
622
623
624 int LIR_Assembler::safepoint_poll(LIR_Opr tmp, CodeEmitInfo* info) {
625 AddressLiteral polling_page(os::get_polling_page() + (SafepointPollOffset % os::vm_page_size()),
626 relocInfo::poll_type);
627 guarantee(info != NULL, "Shouldn't be NULL");
628 int offset = __ offset();
629 if (Assembler::is_polling_page_far()) {
630 __ lea(rscratch1, polling_page);
631 offset = __ offset();
632 add_debug_info_for_branch(info);
633 __ testl(rax, Address(rscratch1, 0));
634 } else {
635 add_debug_info_for_branch(info);
636 __ testl(rax, polling_page);
637 }
638 return offset;
639 }
640
641
642 void LIR_Assembler::move_regs(Register from_reg, Register to_reg) {
643 if (from_reg != to_reg) __ mov(to_reg, from_reg);
644 }
645
646 void LIR_Assembler::swap_reg(Register a, Register b) {
647 __ xchgptr(a, b);
648 }
649
650
651 void LIR_Assembler::const2reg(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) {
652 assert(src->is_constant(), "should not call otherwise");
653 assert(dest->is_register(), "should not call otherwise");
654 LIR_Const* c = src->as_constant_ptr();
655
656 switch (c->type()) {
657 case T_INT: {
658 assert(patch_code == lir_patch_none, "no patching handled here");
659 __ movl(dest->as_register(), c->as_jint());
660 break;
661 }
662
663 case T_ADDRESS: {
664 assert(patch_code == lir_patch_none, "no patching handled here");
665 __ movptr(dest->as_register(), c->as_jint());
666 break;
667 }
668
669 case T_LONG: {
670 assert(patch_code == lir_patch_none, "no patching handled here");
671 #ifdef _LP64
672 __ movptr(dest->as_register_lo(), (intptr_t)c->as_jlong());
673 #else
674 __ movptr(dest->as_register_lo(), c->as_jint_lo());
675 __ movptr(dest->as_register_hi(), c->as_jint_hi());
676 #endif // _LP64
677 break;
678 }
679
680 case T_OBJECT: {
681 if (patch_code != lir_patch_none) {
682 jobject2reg_with_patching(dest->as_register(), info);
683 } else {
684 __ movoop(dest->as_register(), c->as_jobject());
685 }
686 break;
687 }
688
689 case T_METADATA: {
690 if (patch_code != lir_patch_none) {
691 klass2reg_with_patching(dest->as_register(), info);
692 } else {
693 __ mov_metadata(dest->as_register(), c->as_metadata());
694 }
695 break;
696 }
697
698 case T_FLOAT: {
699 if (dest->is_single_xmm()) {
700 if (c->is_zero_float()) {
701 __ xorps(dest->as_xmm_float_reg(), dest->as_xmm_float_reg());
702 } else {
703 __ movflt(dest->as_xmm_float_reg(),
704 InternalAddress(float_constant(c->as_jfloat())));
705 }
706 } else {
707 assert(dest->is_single_fpu(), "must be");
708 assert(dest->fpu_regnr() == 0, "dest must be TOS");
709 if (c->is_zero_float()) {
710 __ fldz();
711 } else if (c->is_one_float()) {
712 __ fld1();
713 } else {
714 __ fld_s (InternalAddress(float_constant(c->as_jfloat())));
715 }
716 }
717 break;
718 }
719
720 case T_DOUBLE: {
721 if (dest->is_double_xmm()) {
722 if (c->is_zero_double()) {
723 __ xorpd(dest->as_xmm_double_reg(), dest->as_xmm_double_reg());
724 } else {
725 __ movdbl(dest->as_xmm_double_reg(),
726 InternalAddress(double_constant(c->as_jdouble())));
727 }
728 } else {
729 assert(dest->is_double_fpu(), "must be");
730 assert(dest->fpu_regnrLo() == 0, "dest must be TOS");
731 if (c->is_zero_double()) {
732 __ fldz();
733 } else if (c->is_one_double()) {
734 __ fld1();
735 } else {
736 __ fld_d (InternalAddress(double_constant(c->as_jdouble())));
737 }
738 }
739 break;
740 }
741
742 default:
743 ShouldNotReachHere();
744 }
745 }
746
747 void LIR_Assembler::const2stack(LIR_Opr src, LIR_Opr dest) {
748 assert(src->is_constant(), "should not call otherwise");
749 assert(dest->is_stack(), "should not call otherwise");
750 LIR_Const* c = src->as_constant_ptr();
751
752 switch (c->type()) {
753 case T_INT: // fall through
754 case T_FLOAT:
755 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits());
756 break;
757
758 case T_ADDRESS:
759 __ movptr(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits());
760 break;
761
762 case T_OBJECT:
763 __ movoop(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jobject());
764 break;
765
766 case T_LONG: // fall through
767 case T_DOUBLE:
768 #ifdef _LP64
769 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(),
770 lo_word_offset_in_bytes), (intptr_t)c->as_jlong_bits());
771 #else
772 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(),
773 lo_word_offset_in_bytes), c->as_jint_lo_bits());
774 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(),
775 hi_word_offset_in_bytes), c->as_jint_hi_bits());
776 #endif // _LP64
777 break;
778
779 default:
780 ShouldNotReachHere();
781 }
782 }
783
784 void LIR_Assembler::const2mem(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info, bool wide) {
785 assert(src->is_constant(), "should not call otherwise");
786 assert(dest->is_address(), "should not call otherwise");
787 LIR_Const* c = src->as_constant_ptr();
788 LIR_Address* addr = dest->as_address_ptr();
789
790 int null_check_here = code_offset();
791 switch (type) {
792 case T_INT: // fall through
793 case T_FLOAT:
794 __ movl(as_Address(addr), c->as_jint_bits());
795 break;
796
797 case T_ADDRESS:
798 __ movptr(as_Address(addr), c->as_jint_bits());
799 break;
800
801 case T_OBJECT: // fall through
802 case T_ARRAY:
803 if (c->as_jobject() == NULL) {
804 if (UseCompressedOops && !wide) {
805 __ movl(as_Address(addr), (int32_t)NULL_WORD);
806 } else {
807 #ifdef _LP64
808 __ xorptr(rscratch1, rscratch1);
809 null_check_here = code_offset();
810 __ movptr(as_Address(addr), rscratch1);
811 #else
812 __ movptr(as_Address(addr), NULL_WORD);
813 #endif
814 }
815 } else {
816 if (is_literal_address(addr)) {
817 ShouldNotReachHere();
818 __ movoop(as_Address(addr, noreg), c->as_jobject());
819 } else {
820 #ifdef _LP64
821 __ movoop(rscratch1, c->as_jobject());
822 if (UseCompressedOops && !wide) {
823 __ encode_heap_oop(rscratch1);
824 null_check_here = code_offset();
825 __ movl(as_Address_lo(addr), rscratch1);
826 } else {
827 null_check_here = code_offset();
828 __ movptr(as_Address_lo(addr), rscratch1);
829 }
830 #else
831 __ movoop(as_Address(addr), c->as_jobject());
832 #endif
833 }
834 }
835 break;
836
837 case T_LONG: // fall through
838 case T_DOUBLE:
839 #ifdef _LP64
840 if (is_literal_address(addr)) {
841 ShouldNotReachHere();
842 __ movptr(as_Address(addr, r15_thread), (intptr_t)c->as_jlong_bits());
843 } else {
844 __ movptr(r10, (intptr_t)c->as_jlong_bits());
845 null_check_here = code_offset();
846 __ movptr(as_Address_lo(addr), r10);
847 }
848 #else
849 // Always reachable in 32bit so this doesn't produce useless move literal
850 __ movptr(as_Address_hi(addr), c->as_jint_hi_bits());
851 __ movptr(as_Address_lo(addr), c->as_jint_lo_bits());
852 #endif // _LP64
853 break;
854
855 case T_BOOLEAN: // fall through
856 case T_BYTE:
857 __ movb(as_Address(addr), c->as_jint() & 0xFF);
858 break;
859
860 case T_CHAR: // fall through
861 case T_SHORT:
862 __ movw(as_Address(addr), c->as_jint() & 0xFFFF);
863 break;
864
865 default:
866 ShouldNotReachHere();
867 };
868
869 if (info != NULL) {
870 add_debug_info_for_null_check(null_check_here, info);
871 }
872 }
873
874
875 void LIR_Assembler::reg2reg(LIR_Opr src, LIR_Opr dest) {
876 assert(src->is_register(), "should not call otherwise");
877 assert(dest->is_register(), "should not call otherwise");
878
879 // move between cpu-registers
880 if (dest->is_single_cpu()) {
881 #ifdef _LP64
882 if (src->type() == T_LONG) {
883 // Can do LONG -> OBJECT
884 move_regs(src->as_register_lo(), dest->as_register());
885 return;
886 }
887 #endif
888 assert(src->is_single_cpu(), "must match");
889 if (src->type() == T_OBJECT) {
890 __ verify_oop(src->as_register());
891 }
892 move_regs(src->as_register(), dest->as_register());
893
894 } else if (dest->is_double_cpu()) {
895 #ifdef _LP64
896 if (src->type() == T_OBJECT || src->type() == T_ARRAY) {
897 // Surprising to me but we can see move of a long to t_object
898 __ verify_oop(src->as_register());
899 move_regs(src->as_register(), dest->as_register_lo());
900 return;
901 }
902 #endif
903 assert(src->is_double_cpu(), "must match");
904 Register f_lo = src->as_register_lo();
905 Register f_hi = src->as_register_hi();
906 Register t_lo = dest->as_register_lo();
907 Register t_hi = dest->as_register_hi();
908 #ifdef _LP64
909 assert(f_hi == f_lo, "must be same");
910 assert(t_hi == t_lo, "must be same");
911 move_regs(f_lo, t_lo);
912 #else
913 assert(f_lo != f_hi && t_lo != t_hi, "invalid register allocation");
914
915
916 if (f_lo == t_hi && f_hi == t_lo) {
917 swap_reg(f_lo, f_hi);
918 } else if (f_hi == t_lo) {
919 assert(f_lo != t_hi, "overwriting register");
920 move_regs(f_hi, t_hi);
921 move_regs(f_lo, t_lo);
922 } else {
923 assert(f_hi != t_lo, "overwriting register");
924 move_regs(f_lo, t_lo);
925 move_regs(f_hi, t_hi);
926 }
927 #endif // LP64
928
929 // special moves from fpu-register to xmm-register
930 // necessary for method results
931 } else if (src->is_single_xmm() && !dest->is_single_xmm()) {
932 __ movflt(Address(rsp, 0), src->as_xmm_float_reg());
933 __ fld_s(Address(rsp, 0));
934 } else if (src->is_double_xmm() && !dest->is_double_xmm()) {
935 __ movdbl(Address(rsp, 0), src->as_xmm_double_reg());
936 __ fld_d(Address(rsp, 0));
937 } else if (dest->is_single_xmm() && !src->is_single_xmm()) {
938 __ fstp_s(Address(rsp, 0));
939 __ movflt(dest->as_xmm_float_reg(), Address(rsp, 0));
940 } else if (dest->is_double_xmm() && !src->is_double_xmm()) {
941 __ fstp_d(Address(rsp, 0));
942 __ movdbl(dest->as_xmm_double_reg(), Address(rsp, 0));
943
944 // move between xmm-registers
945 } else if (dest->is_single_xmm()) {
946 assert(src->is_single_xmm(), "must match");
947 __ movflt(dest->as_xmm_float_reg(), src->as_xmm_float_reg());
948 } else if (dest->is_double_xmm()) {
949 assert(src->is_double_xmm(), "must match");
950 __ movdbl(dest->as_xmm_double_reg(), src->as_xmm_double_reg());
951
952 // move between fpu-registers (no instruction necessary because of fpu-stack)
953 } else if (dest->is_single_fpu() || dest->is_double_fpu()) {
954 assert(src->is_single_fpu() || src->is_double_fpu(), "must match");
955 assert(src->fpu() == dest->fpu(), "currently should be nothing to do");
956 } else {
957 ShouldNotReachHere();
958 }
959 }
960
961 void LIR_Assembler::reg2stack(LIR_Opr src, LIR_Opr dest, BasicType type, bool pop_fpu_stack) {
962 assert(src->is_register(), "should not call otherwise");
963 assert(dest->is_stack(), "should not call otherwise");
964
965 if (src->is_single_cpu()) {
966 Address dst = frame_map()->address_for_slot(dest->single_stack_ix());
967 if (type == T_OBJECT || type == T_ARRAY) {
968 __ verify_oop(src->as_register());
969 __ movptr (dst, src->as_register());
970 } else if (type == T_METADATA || type == T_ADDRESS) {
971 __ movptr (dst, src->as_register());
972 } else {
973 __ movl (dst, src->as_register());
974 }
975
976 } else if (src->is_double_cpu()) {
977 Address dstLO = frame_map()->address_for_slot(dest->double_stack_ix(), lo_word_offset_in_bytes);
978 Address dstHI = frame_map()->address_for_slot(dest->double_stack_ix(), hi_word_offset_in_bytes);
979 __ movptr (dstLO, src->as_register_lo());
980 NOT_LP64(__ movptr (dstHI, src->as_register_hi()));
981
982 } else if (src->is_single_xmm()) {
983 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix());
984 __ movflt(dst_addr, src->as_xmm_float_reg());
985
986 } else if (src->is_double_xmm()) {
987 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix());
988 __ movdbl(dst_addr, src->as_xmm_double_reg());
989
990 } else if (src->is_single_fpu()) {
991 assert(src->fpu_regnr() == 0, "argument must be on TOS");
992 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix());
993 if (pop_fpu_stack) __ fstp_s (dst_addr);
994 else __ fst_s (dst_addr);
995
996 } else if (src->is_double_fpu()) {
997 assert(src->fpu_regnrLo() == 0, "argument must be on TOS");
998 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix());
999 if (pop_fpu_stack) __ fstp_d (dst_addr);
1000 else __ fst_d (dst_addr);
1001
1002 } else {
1003 ShouldNotReachHere();
1004 }
1005 }
1006
1007
1008 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 */) {
1009 LIR_Address* to_addr = dest->as_address_ptr();
1010 PatchingStub* patch = NULL;
1011 Register compressed_src = rscratch1;
1012
1013 if (type == T_ARRAY || type == T_OBJECT) {
1014 __ verify_oop(src->as_register());
1015 #ifdef _LP64
1016 if (UseCompressedOops && !wide) {
1017 __ movptr(compressed_src, src->as_register());
1018 __ encode_heap_oop(compressed_src);
1019 if (patch_code != lir_patch_none) {
1020 info->oop_map()->set_narrowoop(compressed_src->as_VMReg());
1021 }
1022 }
1023 #endif
1024 }
1025
1026 if (patch_code != lir_patch_none) {
1027 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1028 Address toa = as_Address(to_addr);
1029 assert(toa.disp() != 0, "must have");
1030 }
1031
1032 int null_check_here = code_offset();
1033 switch (type) {
1034 case T_FLOAT: {
1035 if (src->is_single_xmm()) {
1036 __ movflt(as_Address(to_addr), src->as_xmm_float_reg());
1037 } else {
1038 assert(src->is_single_fpu(), "must be");
1039 assert(src->fpu_regnr() == 0, "argument must be on TOS");
1040 if (pop_fpu_stack) __ fstp_s(as_Address(to_addr));
1041 else __ fst_s (as_Address(to_addr));
1042 }
1043 break;
1044 }
1045
1046 case T_DOUBLE: {
1047 if (src->is_double_xmm()) {
1048 __ movdbl(as_Address(to_addr), src->as_xmm_double_reg());
1049 } else {
1050 assert(src->is_double_fpu(), "must be");
1051 assert(src->fpu_regnrLo() == 0, "argument must be on TOS");
1052 if (pop_fpu_stack) __ fstp_d(as_Address(to_addr));
1053 else __ fst_d (as_Address(to_addr));
1054 }
1055 break;
1056 }
1057
1058 case T_ARRAY: // fall through
1059 case T_OBJECT: // fall through
1060 if (UseCompressedOops && !wide) {
1061 __ movl(as_Address(to_addr), compressed_src);
1062 } else {
1063 __ movptr(as_Address(to_addr), src->as_register());
1064 }
1065 break;
1066 case T_METADATA:
1067 // We get here to store a method pointer to the stack to pass to
1068 // a dtrace runtime call. This can't work on 64 bit with
1069 // compressed klass ptrs: T_METADATA can be a compressed klass
1070 // ptr or a 64 bit method pointer.
1071 LP64_ONLY(ShouldNotReachHere());
1072 __ movptr(as_Address(to_addr), src->as_register());
1073 break;
1074 case T_ADDRESS:
1075 __ movptr(as_Address(to_addr), src->as_register());
1076 break;
1077 case T_INT:
1078 __ movl(as_Address(to_addr), src->as_register());
1079 break;
1080
1081 case T_LONG: {
1082 Register from_lo = src->as_register_lo();
1083 Register from_hi = src->as_register_hi();
1084 #ifdef _LP64
1085 __ movptr(as_Address_lo(to_addr), from_lo);
1086 #else
1087 Register base = to_addr->base()->as_register();
1088 Register index = noreg;
1089 if (to_addr->index()->is_register()) {
1090 index = to_addr->index()->as_register();
1091 }
1092 if (base == from_lo || index == from_lo) {
1093 assert(base != from_hi, "can't be");
1094 assert(index == noreg || (index != base && index != from_hi), "can't handle this");
1095 __ movl(as_Address_hi(to_addr), from_hi);
1096 if (patch != NULL) {
1097 patching_epilog(patch, lir_patch_high, base, info);
1098 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1099 patch_code = lir_patch_low;
1100 }
1101 __ movl(as_Address_lo(to_addr), from_lo);
1102 } else {
1103 assert(index == noreg || (index != base && index != from_lo), "can't handle this");
1104 __ movl(as_Address_lo(to_addr), from_lo);
1105 if (patch != NULL) {
1106 patching_epilog(patch, lir_patch_low, base, info);
1107 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1108 patch_code = lir_patch_high;
1109 }
1110 __ movl(as_Address_hi(to_addr), from_hi);
1111 }
1112 #endif // _LP64
1113 break;
1114 }
1115
1116 case T_BYTE: // fall through
1117 case T_BOOLEAN: {
1118 Register src_reg = src->as_register();
1119 Address dst_addr = as_Address(to_addr);
1120 assert(VM_Version::is_P6() || src_reg->has_byte_register(), "must use byte registers if not P6");
1121 __ movb(dst_addr, src_reg);
1122 break;
1123 }
1124
1125 case T_CHAR: // fall through
1126 case T_SHORT:
1127 __ movw(as_Address(to_addr), src->as_register());
1128 break;
1129
1130 default:
1131 ShouldNotReachHere();
1132 }
1133 if (info != NULL) {
1134 add_debug_info_for_null_check(null_check_here, info);
1135 }
1136
1137 if (patch_code != lir_patch_none) {
1138 patching_epilog(patch, patch_code, to_addr->base()->as_register(), info);
1139 }
1140 }
1141
1142
1143 void LIR_Assembler::stack2reg(LIR_Opr src, LIR_Opr dest, BasicType type) {
1144 assert(src->is_stack(), "should not call otherwise");
1145 assert(dest->is_register(), "should not call otherwise");
1146
1147 if (dest->is_single_cpu()) {
1148 if (type == T_ARRAY || type == T_OBJECT) {
1149 __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()));
1150 __ verify_oop(dest->as_register());
1151 } else if (type == T_METADATA || type == T_ADDRESS) {
1152 __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()));
1153 } else {
1154 __ movl(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix()));
1155 }
1156
1157 } else if (dest->is_double_cpu()) {
1158 Address src_addr_LO = frame_map()->address_for_slot(src->double_stack_ix(), lo_word_offset_in_bytes);
1159 Address src_addr_HI = frame_map()->address_for_slot(src->double_stack_ix(), hi_word_offset_in_bytes);
1160 __ movptr(dest->as_register_lo(), src_addr_LO);
1161 NOT_LP64(__ movptr(dest->as_register_hi(), src_addr_HI));
1162
1163 } else if (dest->is_single_xmm()) {
1164 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix());
1165 __ movflt(dest->as_xmm_float_reg(), src_addr);
1166
1167 } else if (dest->is_double_xmm()) {
1168 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix());
1169 __ movdbl(dest->as_xmm_double_reg(), src_addr);
1170
1171 } else if (dest->is_single_fpu()) {
1172 assert(dest->fpu_regnr() == 0, "dest must be TOS");
1173 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix());
1174 __ fld_s(src_addr);
1175
1176 } else if (dest->is_double_fpu()) {
1177 assert(dest->fpu_regnrLo() == 0, "dest must be TOS");
1178 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix());
1179 __ fld_d(src_addr);
1180
1181 } else {
1182 ShouldNotReachHere();
1183 }
1184 }
1185
1186
1187 void LIR_Assembler::stack2stack(LIR_Opr src, LIR_Opr dest, BasicType type) {
1188 if (src->is_single_stack()) {
1189 if (type == T_OBJECT || type == T_ARRAY) {
1190 __ pushptr(frame_map()->address_for_slot(src ->single_stack_ix()));
1191 __ popptr (frame_map()->address_for_slot(dest->single_stack_ix()));
1192 } else {
1193 #ifndef _LP64
1194 __ pushl(frame_map()->address_for_slot(src ->single_stack_ix()));
1195 __ popl (frame_map()->address_for_slot(dest->single_stack_ix()));
1196 #else
1197 //no pushl on 64bits
1198 __ movl(rscratch1, frame_map()->address_for_slot(src ->single_stack_ix()));
1199 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), rscratch1);
1200 #endif
1201 }
1202
1203 } else if (src->is_double_stack()) {
1204 #ifdef _LP64
1205 __ pushptr(frame_map()->address_for_slot(src ->double_stack_ix()));
1206 __ popptr (frame_map()->address_for_slot(dest->double_stack_ix()));
1207 #else
1208 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 0));
1209 // push and pop the part at src + wordSize, adding wordSize for the previous push
1210 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 2 * wordSize));
1211 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 2 * wordSize));
1212 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 0));
1213 #endif // _LP64
1214
1215 } else {
1216 ShouldNotReachHere();
1217 }
1218 }
1219
1220
1221 void LIR_Assembler::mem2reg(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool wide, bool /* unaligned */) {
1222 assert(src->is_address(), "should not call otherwise");
1223 assert(dest->is_register(), "should not call otherwise");
1224
1225 LIR_Address* addr = src->as_address_ptr();
1226 Address from_addr = as_Address(addr);
1227
1228 if (addr->base()->type() == T_OBJECT) {
1229 __ verify_oop(addr->base()->as_pointer_register());
1230 }
1231
1232 switch (type) {
1233 case T_BOOLEAN: // fall through
1234 case T_BYTE: // fall through
1235 case T_CHAR: // fall through
1236 case T_SHORT:
1237 if (!VM_Version::is_P6() && !from_addr.uses(dest->as_register())) {
1238 // on pre P6 processors we may get partial register stalls
1239 // so blow away the value of to_rinfo before loading a
1240 // partial word into it. Do it here so that it precedes
1241 // the potential patch point below.
1242 __ xorptr(dest->as_register(), dest->as_register());
1243 }
1244 break;
1245 }
1246
1247 PatchingStub* patch = NULL;
1248 if (patch_code != lir_patch_none) {
1249 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1250 assert(from_addr.disp() != 0, "must have");
1251 }
1252 if (info != NULL) {
1253 add_debug_info_for_null_check_here(info);
1254 }
1255
1256 switch (type) {
1257 case T_FLOAT: {
1258 if (dest->is_single_xmm()) {
1259 __ movflt(dest->as_xmm_float_reg(), from_addr);
1260 } else {
1261 assert(dest->is_single_fpu(), "must be");
1262 assert(dest->fpu_regnr() == 0, "dest must be TOS");
1263 __ fld_s(from_addr);
1264 }
1265 break;
1266 }
1267
1268 case T_DOUBLE: {
1269 if (dest->is_double_xmm()) {
1270 __ movdbl(dest->as_xmm_double_reg(), from_addr);
1271 } else {
1272 assert(dest->is_double_fpu(), "must be");
1273 assert(dest->fpu_regnrLo() == 0, "dest must be TOS");
1274 __ fld_d(from_addr);
1275 }
1276 break;
1277 }
1278
1279 case T_OBJECT: // fall through
1280 case T_ARRAY: // fall through
1281 if (UseCompressedOops && !wide) {
1282 __ movl(dest->as_register(), from_addr);
1283 } else {
1284 __ movptr(dest->as_register(), from_addr);
1285 }
1286 break;
1287
1288 case T_ADDRESS:
1289 if (UseCompressedClassPointers && addr->disp() == oopDesc::klass_offset_in_bytes()) {
1290 __ movl(dest->as_register(), from_addr);
1291 } else {
1292 __ movptr(dest->as_register(), from_addr);
1293 }
1294 break;
1295 case T_INT:
1296 __ movl(dest->as_register(), from_addr);
1297 break;
1298
1299 case T_LONG: {
1300 Register to_lo = dest->as_register_lo();
1301 Register to_hi = dest->as_register_hi();
1302 #ifdef _LP64
1303 __ movptr(to_lo, as_Address_lo(addr));
1304 #else
1305 Register base = addr->base()->as_register();
1306 Register index = noreg;
1307 if (addr->index()->is_register()) {
1308 index = addr->index()->as_register();
1309 }
1310 if ((base == to_lo && index == to_hi) ||
1311 (base == to_hi && index == to_lo)) {
1312 // addresses with 2 registers are only formed as a result of
1313 // array access so this code will never have to deal with
1314 // patches or null checks.
1315 assert(info == NULL && patch == NULL, "must be");
1316 __ lea(to_hi, as_Address(addr));
1317 __ movl(to_lo, Address(to_hi, 0));
1318 __ movl(to_hi, Address(to_hi, BytesPerWord));
1319 } else if (base == to_lo || index == to_lo) {
1320 assert(base != to_hi, "can't be");
1321 assert(index == noreg || (index != base && index != to_hi), "can't handle this");
1322 __ movl(to_hi, as_Address_hi(addr));
1323 if (patch != NULL) {
1324 patching_epilog(patch, lir_patch_high, base, info);
1325 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1326 patch_code = lir_patch_low;
1327 }
1328 __ movl(to_lo, as_Address_lo(addr));
1329 } else {
1330 assert(index == noreg || (index != base && index != to_lo), "can't handle this");
1331 __ movl(to_lo, as_Address_lo(addr));
1332 if (patch != NULL) {
1333 patching_epilog(patch, lir_patch_low, base, info);
1334 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
1335 patch_code = lir_patch_high;
1336 }
1337 __ movl(to_hi, as_Address_hi(addr));
1338 }
1339 #endif // _LP64
1340 break;
1341 }
1342
1343 case T_BOOLEAN: // fall through
1344 case T_BYTE: {
1345 Register dest_reg = dest->as_register();
1346 assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6");
1347 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) {
1348 __ movsbl(dest_reg, from_addr);
1349 } else {
1350 __ movb(dest_reg, from_addr);
1351 __ shll(dest_reg, 24);
1352 __ sarl(dest_reg, 24);
1353 }
1354 break;
1355 }
1356
1357 case T_CHAR: {
1358 Register dest_reg = dest->as_register();
1359 assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6");
1360 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) {
1361 __ movzwl(dest_reg, from_addr);
1362 } else {
1363 __ movw(dest_reg, from_addr);
1364 }
1365 break;
1366 }
1367
1368 case T_SHORT: {
1369 Register dest_reg = dest->as_register();
1370 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) {
1371 __ movswl(dest_reg, from_addr);
1372 } else {
1373 __ movw(dest_reg, from_addr);
1374 __ shll(dest_reg, 16);
1375 __ sarl(dest_reg, 16);
1376 }
1377 break;
1378 }
1379
1380 default:
1381 ShouldNotReachHere();
1382 }
1383
1384 if (patch != NULL) {
1385 patching_epilog(patch, patch_code, addr->base()->as_register(), info);
1386 }
1387
1388 if (type == T_ARRAY || type == T_OBJECT) {
1389 #ifdef _LP64
1390 if (UseCompressedOops && !wide) {
1391 __ decode_heap_oop(dest->as_register());
1392 }
1393 #endif
1394 __ verify_oop(dest->as_register());
1395 } else if (type == T_ADDRESS && addr->disp() == oopDesc::klass_offset_in_bytes()) {
1396 #ifdef _LP64
1397 if (UseCompressedClassPointers) {
1398 __ decode_klass_not_null(dest->as_register());
1399 }
1400 #endif
1401 }
1402 }
1403
1404
1405 void LIR_Assembler::prefetchr(LIR_Opr src) {
1406 LIR_Address* addr = src->as_address_ptr();
1407 Address from_addr = as_Address(addr);
1408
1409 if (VM_Version::supports_sse()) {
1410 switch (ReadPrefetchInstr) {
1411 case 0:
1412 __ prefetchnta(from_addr); break;
1413 case 1:
1414 __ prefetcht0(from_addr); break;
1415 case 2:
1416 __ prefetcht2(from_addr); break;
1417 default:
1418 ShouldNotReachHere(); break;
1419 }
1420 } else if (VM_Version::supports_3dnow_prefetch()) {
1421 __ prefetchr(from_addr);
1422 }
1423 }
1424
1425
1426 void LIR_Assembler::prefetchw(LIR_Opr src) {
1427 LIR_Address* addr = src->as_address_ptr();
1428 Address from_addr = as_Address(addr);
1429
1430 if (VM_Version::supports_sse()) {
1431 switch (AllocatePrefetchInstr) {
1432 case 0:
1433 __ prefetchnta(from_addr); break;
1434 case 1:
1435 __ prefetcht0(from_addr); break;
1436 case 2:
1437 __ prefetcht2(from_addr); break;
1438 case 3:
1439 __ prefetchw(from_addr); break;
1440 default:
1441 ShouldNotReachHere(); break;
1442 }
1443 } else if (VM_Version::supports_3dnow_prefetch()) {
1444 __ prefetchw(from_addr);
1445 }
1446 }
1447
1448
1449 NEEDS_CLEANUP; // This could be static?
1450 Address::ScaleFactor LIR_Assembler::array_element_size(BasicType type) const {
1451 int elem_size = type2aelembytes(type);
1452 switch (elem_size) {
1453 case 1: return Address::times_1;
1454 case 2: return Address::times_2;
1455 case 4: return Address::times_4;
1456 case 8: return Address::times_8;
1457 }
1458 ShouldNotReachHere();
1459 return Address::no_scale;
1460 }
1461
1462
1463 void LIR_Assembler::emit_op3(LIR_Op3* op) {
1464 switch (op->code()) {
1465 case lir_idiv:
1466 case lir_irem:
1467 arithmetic_idiv(op->code(),
1468 op->in_opr1(),
1469 op->in_opr2(),
1470 op->in_opr3(),
1471 op->result_opr(),
1472 op->info());
1473 break;
1474 default: ShouldNotReachHere(); break;
1475 }
1476 }
1477
1478 void LIR_Assembler::emit_opBranch(LIR_OpBranch* op) {
1479 #ifdef ASSERT
1480 assert(op->block() == NULL || op->block()->label() == op->label(), "wrong label");
1481 if (op->block() != NULL) _branch_target_blocks.append(op->block());
1482 if (op->ublock() != NULL) _branch_target_blocks.append(op->ublock());
1483 #endif
1484
1485 if (op->cond() == lir_cond_always) {
1486 if (op->info() != NULL) add_debug_info_for_branch(op->info());
1487 __ jmp (*(op->label()));
1488 } else {
1489 Assembler::Condition acond = Assembler::zero;
1490 if (op->code() == lir_cond_float_branch) {
1491 assert(op->ublock() != NULL, "must have unordered successor");
1492 __ jcc(Assembler::parity, *(op->ublock()->label()));
1493 switch(op->cond()) {
1494 case lir_cond_equal: acond = Assembler::equal; break;
1495 case lir_cond_notEqual: acond = Assembler::notEqual; break;
1496 case lir_cond_less: acond = Assembler::below; break;
1497 case lir_cond_lessEqual: acond = Assembler::belowEqual; break;
1498 case lir_cond_greaterEqual: acond = Assembler::aboveEqual; break;
1499 case lir_cond_greater: acond = Assembler::above; break;
1500 default: ShouldNotReachHere();
1501 }
1502 } else {
1503 switch (op->cond()) {
1504 case lir_cond_equal: acond = Assembler::equal; break;
1505 case lir_cond_notEqual: acond = Assembler::notEqual; break;
1506 case lir_cond_less: acond = Assembler::less; break;
1507 case lir_cond_lessEqual: acond = Assembler::lessEqual; break;
1508 case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break;
1509 case lir_cond_greater: acond = Assembler::greater; break;
1510 case lir_cond_belowEqual: acond = Assembler::belowEqual; break;
1511 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; break;
1512 default: ShouldNotReachHere();
1513 }
1514 }
1515 __ jcc(acond,*(op->label()));
1516 }
1517 }
1518
1519 void LIR_Assembler::emit_opConvert(LIR_OpConvert* op) {
1520 LIR_Opr src = op->in_opr();
1521 LIR_Opr dest = op->result_opr();
1522
1523 switch (op->bytecode()) {
1524 case Bytecodes::_i2l:
1525 #ifdef _LP64
1526 __ movl2ptr(dest->as_register_lo(), src->as_register());
1527 #else
1528 move_regs(src->as_register(), dest->as_register_lo());
1529 move_regs(src->as_register(), dest->as_register_hi());
1530 __ sarl(dest->as_register_hi(), 31);
1531 #endif // LP64
1532 break;
1533
1534 case Bytecodes::_l2i:
1535 #ifdef _LP64
1536 __ movl(dest->as_register(), src->as_register_lo());
1537 #else
1538 move_regs(src->as_register_lo(), dest->as_register());
1539 #endif
1540 break;
1541
1542 case Bytecodes::_i2b:
1543 move_regs(src->as_register(), dest->as_register());
1544 __ sign_extend_byte(dest->as_register());
1545 break;
1546
1547 case Bytecodes::_i2c:
1548 move_regs(src->as_register(), dest->as_register());
1549 __ andl(dest->as_register(), 0xFFFF);
1550 break;
1551
1552 case Bytecodes::_i2s:
1553 move_regs(src->as_register(), dest->as_register());
1554 __ sign_extend_short(dest->as_register());
1555 break;
1556
1557
1558 case Bytecodes::_f2d:
1559 case Bytecodes::_d2f:
1560 if (dest->is_single_xmm()) {
1561 __ cvtsd2ss(dest->as_xmm_float_reg(), src->as_xmm_double_reg());
1562 } else if (dest->is_double_xmm()) {
1563 __ cvtss2sd(dest->as_xmm_double_reg(), src->as_xmm_float_reg());
1564 } else {
1565 assert(src->fpu() == dest->fpu(), "register must be equal");
1566 // do nothing (float result is rounded later through spilling)
1567 }
1568 break;
1569
1570 case Bytecodes::_i2f:
1571 case Bytecodes::_i2d:
1572 if (dest->is_single_xmm()) {
1573 __ cvtsi2ssl(dest->as_xmm_float_reg(), src->as_register());
1574 } else if (dest->is_double_xmm()) {
1575 __ cvtsi2sdl(dest->as_xmm_double_reg(), src->as_register());
1576 } else {
1577 assert(dest->fpu() == 0, "result must be on TOS");
1578 __ movl(Address(rsp, 0), src->as_register());
1579 __ fild_s(Address(rsp, 0));
1580 }
1581 break;
1582
1583 case Bytecodes::_f2i:
1584 case Bytecodes::_d2i:
1585 if (src->is_single_xmm()) {
1586 __ cvttss2sil(dest->as_register(), src->as_xmm_float_reg());
1587 } else if (src->is_double_xmm()) {
1588 __ cvttsd2sil(dest->as_register(), src->as_xmm_double_reg());
1589 } else {
1590 assert(src->fpu() == 0, "input must be on TOS");
1591 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_trunc()));
1592 __ fist_s(Address(rsp, 0));
1593 __ movl(dest->as_register(), Address(rsp, 0));
1594 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
1595 }
1596
1597 // IA32 conversion instructions do not match JLS for overflow, underflow and NaN -> fixup in stub
1598 assert(op->stub() != NULL, "stub required");
1599 __ cmpl(dest->as_register(), 0x80000000);
1600 __ jcc(Assembler::equal, *op->stub()->entry());
1601 __ bind(*op->stub()->continuation());
1602 break;
1603
1604 case Bytecodes::_l2f:
1605 case Bytecodes::_l2d:
1606 assert(!dest->is_xmm_register(), "result in xmm register not supported (no SSE instruction present)");
1607 assert(dest->fpu() == 0, "result must be on TOS");
1608
1609 __ movptr(Address(rsp, 0), src->as_register_lo());
1610 NOT_LP64(__ movl(Address(rsp, BytesPerWord), src->as_register_hi()));
1611 __ fild_d(Address(rsp, 0));
1612 // float result is rounded later through spilling
1613 break;
1614
1615 case Bytecodes::_f2l:
1616 case Bytecodes::_d2l:
1617 assert(!src->is_xmm_register(), "input in xmm register not supported (no SSE instruction present)");
1618 assert(src->fpu() == 0, "input must be on TOS");
1619 assert(dest == FrameMap::long0_opr, "runtime stub places result in these registers");
1620
1621 // instruction sequence too long to inline it here
1622 {
1623 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::fpu2long_stub_id)));
1624 }
1625 break;
1626
1627 default: ShouldNotReachHere();
1628 }
1629 }
1630
1631 void LIR_Assembler::emit_alloc_obj(LIR_OpAllocObj* op) {
1632 if (op->init_check()) {
1633 __ cmpb(Address(op->klass()->as_register(),
1634 InstanceKlass::init_state_offset()),
1635 InstanceKlass::fully_initialized);
1636 add_debug_info_for_null_check_here(op->stub()->info());
1637 __ jcc(Assembler::notEqual, *op->stub()->entry());
1638 }
1639 __ allocate_object(op->obj()->as_register(),
1640 op->tmp1()->as_register(),
1641 op->tmp2()->as_register(),
1642 op->header_size(),
1643 op->object_size(),
1644 op->klass()->as_register(),
1645 *op->stub()->entry());
1646 __ bind(*op->stub()->continuation());
1647 }
1648
1649 void LIR_Assembler::emit_alloc_array(LIR_OpAllocArray* op) {
1650 Register len = op->len()->as_register();
1651 LP64_ONLY( __ movslq(len, len); )
1652
1653 if (UseSlowPath ||
1654 (!UseFastNewObjectArray && (op->type() == T_OBJECT || op->type() == T_ARRAY)) ||
1655 (!UseFastNewTypeArray && (op->type() != T_OBJECT && op->type() != T_ARRAY))) {
1656 __ jmp(*op->stub()->entry());
1657 } else {
1658 Register tmp1 = op->tmp1()->as_register();
1659 Register tmp2 = op->tmp2()->as_register();
1660 Register tmp3 = op->tmp3()->as_register();
1661 if (len == tmp1) {
1662 tmp1 = tmp3;
1663 } else if (len == tmp2) {
1664 tmp2 = tmp3;
1665 } else if (len == tmp3) {
1666 // everything is ok
1667 } else {
1668 __ mov(tmp3, len);
1669 }
1670 __ allocate_array(op->obj()->as_register(),
1671 len,
1672 tmp1,
1673 tmp2,
1674 arrayOopDesc::header_size(op->type()),
1675 array_element_size(op->type()),
1676 op->klass()->as_register(),
1677 *op->stub()->entry());
1678 }
1679 __ bind(*op->stub()->continuation());
1680 }
1681
1682 void LIR_Assembler::type_profile_helper(Register mdo,
1683 ciMethodData *md, ciProfileData *data,
1684 Register recv, Label* update_done) {
1685 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) {
1686 Label next_test;
1687 // See if the receiver is receiver[n].
1688 __ cmpptr(recv, Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i))));
1689 __ jccb(Assembler::notEqual, next_test);
1690 Address data_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i)));
1691 __ addptr(data_addr, DataLayout::counter_increment);
1692 __ jmp(*update_done);
1693 __ bind(next_test);
1694 }
1695
1696 // Didn't find receiver; find next empty slot and fill it in
1697 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) {
1698 Label next_test;
1699 Address recv_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i)));
1700 __ cmpptr(recv_addr, (intptr_t)NULL_WORD);
1701 __ jccb(Assembler::notEqual, next_test);
1702 __ movptr(recv_addr, recv);
1703 __ movptr(Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i))), DataLayout::counter_increment);
1704 __ jmp(*update_done);
1705 __ bind(next_test);
1706 }
1707 }
1708
1709 void LIR_Assembler::emit_typecheck_helper(LIR_OpTypeCheck *op, Label* success, Label* failure, Label* obj_is_null) {
1710 // we always need a stub for the failure case.
1711 CodeStub* stub = op->stub();
1712 Register obj = op->object()->as_register();
1713 Register k_RInfo = op->tmp1()->as_register();
1714 Register klass_RInfo = op->tmp2()->as_register();
1715 Register dst = op->result_opr()->as_register();
1716 ciKlass* k = op->klass();
1717 Register Rtmp1 = noreg;
1718
1719 // check if it needs to be profiled
1720 ciMethodData* md = NULL;
1721 ciProfileData* data = NULL;
1722
1723 if (op->should_profile()) {
1724 ciMethod* method = op->profiled_method();
1725 assert(method != NULL, "Should have method");
1726 int bci = op->profiled_bci();
1727 md = method->method_data_or_null();
1728 assert(md != NULL, "Sanity");
1729 data = md->bci_to_data(bci);
1730 assert(data != NULL, "need data for type check");
1731 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check");
1732 }
1733 Label profile_cast_success, profile_cast_failure;
1734 Label *success_target = op->should_profile() ? &profile_cast_success : success;
1735 Label *failure_target = op->should_profile() ? &profile_cast_failure : failure;
1736
1737 if (obj == k_RInfo) {
1738 k_RInfo = dst;
1739 } else if (obj == klass_RInfo) {
1740 klass_RInfo = dst;
1741 }
1742 if (k->is_loaded() && !UseCompressedClassPointers) {
1743 select_different_registers(obj, dst, k_RInfo, klass_RInfo);
1744 } else {
1745 Rtmp1 = op->tmp3()->as_register();
1746 select_different_registers(obj, dst, k_RInfo, klass_RInfo, Rtmp1);
1747 }
1748
1749 assert_different_registers(obj, k_RInfo, klass_RInfo);
1750
1751 __ cmpptr(obj, (int32_t)NULL_WORD);
1752 if (op->should_profile()) {
1753 Label not_null;
1754 __ jccb(Assembler::notEqual, not_null);
1755 // Object is null; update MDO and exit
1756 Register mdo = klass_RInfo;
1757 __ mov_metadata(mdo, md->constant_encoding());
1758 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::header_offset()));
1759 int header_bits = DataLayout::flag_mask_to_header_mask(BitData::null_seen_byte_constant());
1760 __ orl(data_addr, header_bits);
1761 __ jmp(*obj_is_null);
1762 __ bind(not_null);
1763 } else {
1764 __ jcc(Assembler::equal, *obj_is_null);
1765 }
1766
1767 if (!k->is_loaded()) {
1768 klass2reg_with_patching(k_RInfo, op->info_for_patch());
1769 } else {
1770 #ifdef _LP64
1771 __ mov_metadata(k_RInfo, k->constant_encoding());
1772 #endif // _LP64
1773 }
1774 __ verify_oop(obj);
1775
1776 if (op->fast_check()) {
1777 // get object class
1778 // not a safepoint as obj null check happens earlier
1779 #ifdef _LP64
1780 if (UseCompressedClassPointers) {
1781 __ load_klass(Rtmp1, obj);
1782 __ cmpptr(k_RInfo, Rtmp1);
1783 } else {
1784 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes()));
1785 }
1786 #else
1787 if (k->is_loaded()) {
1788 __ cmpklass(Address(obj, oopDesc::klass_offset_in_bytes()), k->constant_encoding());
1789 } else {
1790 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes()));
1791 }
1792 #endif
1793 __ jcc(Assembler::notEqual, *failure_target);
1794 // successful cast, fall through to profile or jump
1795 } else {
1796 // get object class
1797 // not a safepoint as obj null check happens earlier
1798 __ load_klass(klass_RInfo, obj);
1799 if (k->is_loaded()) {
1800 // See if we get an immediate positive hit
1801 #ifdef _LP64
1802 __ cmpptr(k_RInfo, Address(klass_RInfo, k->super_check_offset()));
1803 #else
1804 __ cmpklass(Address(klass_RInfo, k->super_check_offset()), k->constant_encoding());
1805 #endif // _LP64
1806 if ((juint)in_bytes(Klass::secondary_super_cache_offset()) != k->super_check_offset()) {
1807 __ jcc(Assembler::notEqual, *failure_target);
1808 // successful cast, fall through to profile or jump
1809 } else {
1810 // See if we get an immediate positive hit
1811 __ jcc(Assembler::equal, *success_target);
1812 // check for self
1813 #ifdef _LP64
1814 __ cmpptr(klass_RInfo, k_RInfo);
1815 #else
1816 __ cmpklass(klass_RInfo, k->constant_encoding());
1817 #endif // _LP64
1818 __ jcc(Assembler::equal, *success_target);
1819
1820 __ push(klass_RInfo);
1821 #ifdef _LP64
1822 __ push(k_RInfo);
1823 #else
1824 __ pushklass(k->constant_encoding());
1825 #endif // _LP64
1826 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
1827 __ pop(klass_RInfo);
1828 __ pop(klass_RInfo);
1829 // result is a boolean
1830 __ cmpl(klass_RInfo, 0);
1831 __ jcc(Assembler::equal, *failure_target);
1832 // successful cast, fall through to profile or jump
1833 }
1834 } else {
1835 // perform the fast part of the checking logic
1836 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL);
1837 // call out-of-line instance of __ check_klass_subtype_slow_path(...):
1838 __ push(klass_RInfo);
1839 __ push(k_RInfo);
1840 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
1841 __ pop(klass_RInfo);
1842 __ pop(k_RInfo);
1843 // result is a boolean
1844 __ cmpl(k_RInfo, 0);
1845 __ jcc(Assembler::equal, *failure_target);
1846 // successful cast, fall through to profile or jump
1847 }
1848 }
1849 if (op->should_profile()) {
1850 Register mdo = klass_RInfo, recv = k_RInfo;
1851 __ bind(profile_cast_success);
1852 __ mov_metadata(mdo, md->constant_encoding());
1853 __ load_klass(recv, obj);
1854 Label update_done;
1855 type_profile_helper(mdo, md, data, recv, success);
1856 __ jmp(*success);
1857
1858 __ bind(profile_cast_failure);
1859 __ mov_metadata(mdo, md->constant_encoding());
1860 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
1861 __ subptr(counter_addr, DataLayout::counter_increment);
1862 __ jmp(*failure);
1863 }
1864 __ jmp(*success);
1865 }
1866
1867
1868 void LIR_Assembler::emit_opTypeCheck(LIR_OpTypeCheck* op) {
1869 LIR_Code code = op->code();
1870 if (code == lir_store_check) {
1871 Register value = op->object()->as_register();
1872 Register array = op->array()->as_register();
1873 Register k_RInfo = op->tmp1()->as_register();
1874 Register klass_RInfo = op->tmp2()->as_register();
1875 Register Rtmp1 = op->tmp3()->as_register();
1876
1877 CodeStub* stub = op->stub();
1878
1879 // check if it needs to be profiled
1880 ciMethodData* md = NULL;
1881 ciProfileData* data = NULL;
1882
1883 if (op->should_profile()) {
1884 ciMethod* method = op->profiled_method();
1885 assert(method != NULL, "Should have method");
1886 int bci = op->profiled_bci();
1887 md = method->method_data_or_null();
1888 assert(md != NULL, "Sanity");
1889 data = md->bci_to_data(bci);
1890 assert(data != NULL, "need data for type check");
1891 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check");
1892 }
1893 Label profile_cast_success, profile_cast_failure, done;
1894 Label *success_target = op->should_profile() ? &profile_cast_success : &done;
1895 Label *failure_target = op->should_profile() ? &profile_cast_failure : stub->entry();
1896
1897 __ cmpptr(value, (int32_t)NULL_WORD);
1898 if (op->should_profile()) {
1899 Label not_null;
1900 __ jccb(Assembler::notEqual, not_null);
1901 // Object is null; update MDO and exit
1902 Register mdo = klass_RInfo;
1903 __ mov_metadata(mdo, md->constant_encoding());
1904 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::header_offset()));
1905 int header_bits = DataLayout::flag_mask_to_header_mask(BitData::null_seen_byte_constant());
1906 __ orl(data_addr, header_bits);
1907 __ jmp(done);
1908 __ bind(not_null);
1909 } else {
1910 __ jcc(Assembler::equal, done);
1911 }
1912
1913 add_debug_info_for_null_check_here(op->info_for_exception());
1914 __ load_klass(k_RInfo, array);
1915 __ load_klass(klass_RInfo, value);
1916
1917 // get instance klass (it's already uncompressed)
1918 __ movptr(k_RInfo, Address(k_RInfo, ObjArrayKlass::element_klass_offset()));
1919 // perform the fast part of the checking logic
1920 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL);
1921 // call out-of-line instance of __ check_klass_subtype_slow_path(...):
1922 __ push(klass_RInfo);
1923 __ push(k_RInfo);
1924 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
1925 __ pop(klass_RInfo);
1926 __ pop(k_RInfo);
1927 // result is a boolean
1928 __ cmpl(k_RInfo, 0);
1929 __ jcc(Assembler::equal, *failure_target);
1930 // fall through to the success case
1931
1932 if (op->should_profile()) {
1933 Register mdo = klass_RInfo, recv = k_RInfo;
1934 __ bind(profile_cast_success);
1935 __ mov_metadata(mdo, md->constant_encoding());
1936 __ load_klass(recv, value);
1937 Label update_done;
1938 type_profile_helper(mdo, md, data, recv, &done);
1939 __ jmpb(done);
1940
1941 __ bind(profile_cast_failure);
1942 __ mov_metadata(mdo, md->constant_encoding());
1943 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
1944 __ subptr(counter_addr, DataLayout::counter_increment);
1945 __ jmp(*stub->entry());
1946 }
1947
1948 __ bind(done);
1949 } else
1950 if (code == lir_checkcast) {
1951 Register obj = op->object()->as_register();
1952 Register dst = op->result_opr()->as_register();
1953 Label success;
1954 emit_typecheck_helper(op, &success, op->stub()->entry(), &success);
1955 __ bind(success);
1956 if (dst != obj) {
1957 __ mov(dst, obj);
1958 }
1959 } else
1960 if (code == lir_instanceof) {
1961 Register obj = op->object()->as_register();
1962 Register dst = op->result_opr()->as_register();
1963 Label success, failure, done;
1964 emit_typecheck_helper(op, &success, &failure, &failure);
1965 __ bind(failure);
1966 __ xorptr(dst, dst);
1967 __ jmpb(done);
1968 __ bind(success);
1969 __ movptr(dst, 1);
1970 __ bind(done);
1971 } else {
1972 ShouldNotReachHere();
1973 }
1974
1975 }
1976
1977
1978 void LIR_Assembler::emit_compare_and_swap(LIR_OpCompareAndSwap* op) {
1979 if (LP64_ONLY(false &&) op->code() == lir_cas_long && VM_Version::supports_cx8()) {
1980 assert(op->cmp_value()->as_register_lo() == rax, "wrong register");
1981 assert(op->cmp_value()->as_register_hi() == rdx, "wrong register");
1982 assert(op->new_value()->as_register_lo() == rbx, "wrong register");
1983 assert(op->new_value()->as_register_hi() == rcx, "wrong register");
1984 Register addr = op->addr()->as_register();
1985 if (os::is_MP()) {
1986 __ lock();
1987 }
1988 NOT_LP64(__ cmpxchg8(Address(addr, 0)));
1989
1990 } else if (op->code() == lir_cas_int || op->code() == lir_cas_obj ) {
1991 NOT_LP64(assert(op->addr()->is_single_cpu(), "must be single");)
1992 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo());
1993 Register newval = op->new_value()->as_register();
1994 Register cmpval = op->cmp_value()->as_register();
1995 assert(cmpval == rax, "wrong register");
1996 assert(newval != NULL, "new val must be register");
1997 assert(cmpval != newval, "cmp and new values must be in different registers");
1998 assert(cmpval != addr, "cmp and addr must be in different registers");
1999 assert(newval != addr, "new value and addr must be in different registers");
2000
2001 if ( op->code() == lir_cas_obj) {
2002 #ifdef _LP64
2003 if (UseCompressedOops) {
2004 #if INCLUDE_ALL_GCS
2005 if (UseShenandoahGC && ShenandoahCASBarrier) {
2006 Register tmp1 = op->tmp1()->as_register();
2007 Register tmp2 = op->tmp2()->as_register();
2008 Register res = op->result_opr()->as_register();
2009 __ encode_heap_oop(cmpval);
2010 __ mov(rscratch1, newval);
2011 __ encode_heap_oop(rscratch1);
2012 ShenandoahBarrierSetAssembler::bsasm()->cmpxchg_oop(_masm, res, Address(addr, 0), cmpval, rscratch1, false, tmp1, tmp2);
2013 } else
2014 #endif
2015 {
2016 __ encode_heap_oop(cmpval);
2017 __ mov(rscratch1, newval);
2018 __ encode_heap_oop(rscratch1);
2019 if (os::is_MP()) {
2020 __ lock();
2021 }
2022 // cmpval (rax) is implicitly used by this instruction
2023 __ cmpxchgl(rscratch1, Address(addr, 0));
2024 }
2025 } else
2026 #endif
2027 {
2028 #if INCLUDE_ALL_GCS
2029 if (UseShenandoahGC && ShenandoahCASBarrier) {
2030 Register tmp1 = op->tmp1()->as_register();
2031 Register tmp2 = op->tmp2()->as_register();
2032 Register res = op->result_opr()->as_register();
2033 ShenandoahBarrierSetAssembler::bsasm()->cmpxchg_oop(_masm, res, Address(addr, 0), cmpval, newval, false, tmp1, tmp2);
2034 } else
2035 #endif
2036 {
2037 if (os::is_MP()) {
2038 __ lock();
2039 }
2040 __ cmpxchgptr(newval, Address(addr, 0));
2041 }
2042 }
2043 } else {
2044 assert(op->code() == lir_cas_int, "lir_cas_int expected");
2045 if (os::is_MP()) {
2046 __ lock();
2047 }
2048 __ cmpxchgl(newval, Address(addr, 0));
2049 }
2050 #ifdef _LP64
2051 } else if (op->code() == lir_cas_long) {
2052 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo());
2053 Register newval = op->new_value()->as_register_lo();
2054 Register cmpval = op->cmp_value()->as_register_lo();
2055 assert(cmpval == rax, "wrong register");
2056 assert(newval != NULL, "new val must be register");
2057 assert(cmpval != newval, "cmp and new values must be in different registers");
2058 assert(cmpval != addr, "cmp and addr must be in different registers");
2059 assert(newval != addr, "new value and addr must be in different registers");
2060 if (os::is_MP()) {
2061 __ lock();
2062 }
2063 __ cmpxchgq(newval, Address(addr, 0));
2064 #endif // _LP64
2065 } else {
2066 Unimplemented();
2067 }
2068 }
2069
2070 void LIR_Assembler::cmove(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result, BasicType type) {
2071 Assembler::Condition acond, ncond;
2072 switch (condition) {
2073 case lir_cond_equal: acond = Assembler::equal; ncond = Assembler::notEqual; break;
2074 case lir_cond_notEqual: acond = Assembler::notEqual; ncond = Assembler::equal; break;
2075 case lir_cond_less: acond = Assembler::less; ncond = Assembler::greaterEqual; break;
2076 case lir_cond_lessEqual: acond = Assembler::lessEqual; ncond = Assembler::greater; break;
2077 case lir_cond_greaterEqual: acond = Assembler::greaterEqual; ncond = Assembler::less; break;
2078 case lir_cond_greater: acond = Assembler::greater; ncond = Assembler::lessEqual; break;
2079 case lir_cond_belowEqual: acond = Assembler::belowEqual; ncond = Assembler::above; break;
2080 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; ncond = Assembler::below; break;
2081 default: acond = Assembler::equal; ncond = Assembler::notEqual;
2082 ShouldNotReachHere();
2083 }
2084
2085 if (opr1->is_cpu_register()) {
2086 reg2reg(opr1, result);
2087 } else if (opr1->is_stack()) {
2088 stack2reg(opr1, result, result->type());
2089 } else if (opr1->is_constant()) {
2090 const2reg(opr1, result, lir_patch_none, NULL);
2091 } else {
2092 ShouldNotReachHere();
2093 }
2094
2095 if (VM_Version::supports_cmov() && !opr2->is_constant()) {
2096 // optimized version that does not require a branch
2097 if (opr2->is_single_cpu()) {
2098 assert(opr2->cpu_regnr() != result->cpu_regnr(), "opr2 already overwritten by previous move");
2099 __ cmov(ncond, result->as_register(), opr2->as_register());
2100 } else if (opr2->is_double_cpu()) {
2101 assert(opr2->cpu_regnrLo() != result->cpu_regnrLo() && opr2->cpu_regnrLo() != result->cpu_regnrHi(), "opr2 already overwritten by previous move");
2102 assert(opr2->cpu_regnrHi() != result->cpu_regnrLo() && opr2->cpu_regnrHi() != result->cpu_regnrHi(), "opr2 already overwritten by previous move");
2103 __ cmovptr(ncond, result->as_register_lo(), opr2->as_register_lo());
2104 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), opr2->as_register_hi());)
2105 } else if (opr2->is_single_stack()) {
2106 __ cmovl(ncond, result->as_register(), frame_map()->address_for_slot(opr2->single_stack_ix()));
2107 } else if (opr2->is_double_stack()) {
2108 __ cmovptr(ncond, result->as_register_lo(), frame_map()->address_for_slot(opr2->double_stack_ix(), lo_word_offset_in_bytes));
2109 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), frame_map()->address_for_slot(opr2->double_stack_ix(), hi_word_offset_in_bytes));)
2110 } else {
2111 ShouldNotReachHere();
2112 }
2113
2114 } else {
2115 Label skip;
2116 __ jcc (acond, skip);
2117 if (opr2->is_cpu_register()) {
2118 reg2reg(opr2, result);
2119 } else if (opr2->is_stack()) {
2120 stack2reg(opr2, result, result->type());
2121 } else if (opr2->is_constant()) {
2122 const2reg(opr2, result, lir_patch_none, NULL);
2123 } else {
2124 ShouldNotReachHere();
2125 }
2126 __ bind(skip);
2127 }
2128 }
2129
2130
2131 void LIR_Assembler::arith_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dest, CodeEmitInfo* info, bool pop_fpu_stack) {
2132 assert(info == NULL, "should never be used, idiv/irem and ldiv/lrem not handled by this method");
2133
2134 if (left->is_single_cpu()) {
2135 assert(left == dest, "left and dest must be equal");
2136 Register lreg = left->as_register();
2137
2138 if (right->is_single_cpu()) {
2139 // cpu register - cpu register
2140 Register rreg = right->as_register();
2141 switch (code) {
2142 case lir_add: __ addl (lreg, rreg); break;
2143 case lir_sub: __ subl (lreg, rreg); break;
2144 case lir_mul: __ imull(lreg, rreg); break;
2145 default: ShouldNotReachHere();
2146 }
2147
2148 } else if (right->is_stack()) {
2149 // cpu register - stack
2150 Address raddr = frame_map()->address_for_slot(right->single_stack_ix());
2151 switch (code) {
2152 case lir_add: __ addl(lreg, raddr); break;
2153 case lir_sub: __ subl(lreg, raddr); break;
2154 default: ShouldNotReachHere();
2155 }
2156
2157 } else if (right->is_constant()) {
2158 // cpu register - constant
2159 jint c = right->as_constant_ptr()->as_jint();
2160 switch (code) {
2161 case lir_add: {
2162 __ incrementl(lreg, c);
2163 break;
2164 }
2165 case lir_sub: {
2166 __ decrementl(lreg, c);
2167 break;
2168 }
2169 default: ShouldNotReachHere();
2170 }
2171
2172 } else {
2173 ShouldNotReachHere();
2174 }
2175
2176 } else if (left->is_double_cpu()) {
2177 assert(left == dest, "left and dest must be equal");
2178 Register lreg_lo = left->as_register_lo();
2179 Register lreg_hi = left->as_register_hi();
2180
2181 if (right->is_double_cpu()) {
2182 // cpu register - cpu register
2183 Register rreg_lo = right->as_register_lo();
2184 Register rreg_hi = right->as_register_hi();
2185 NOT_LP64(assert_different_registers(lreg_lo, lreg_hi, rreg_lo, rreg_hi));
2186 LP64_ONLY(assert_different_registers(lreg_lo, rreg_lo));
2187 switch (code) {
2188 case lir_add:
2189 __ addptr(lreg_lo, rreg_lo);
2190 NOT_LP64(__ adcl(lreg_hi, rreg_hi));
2191 break;
2192 case lir_sub:
2193 __ subptr(lreg_lo, rreg_lo);
2194 NOT_LP64(__ sbbl(lreg_hi, rreg_hi));
2195 break;
2196 case lir_mul:
2197 #ifdef _LP64
2198 __ imulq(lreg_lo, rreg_lo);
2199 #else
2200 assert(lreg_lo == rax && lreg_hi == rdx, "must be");
2201 __ imull(lreg_hi, rreg_lo);
2202 __ imull(rreg_hi, lreg_lo);
2203 __ addl (rreg_hi, lreg_hi);
2204 __ mull (rreg_lo);
2205 __ addl (lreg_hi, rreg_hi);
2206 #endif // _LP64
2207 break;
2208 default:
2209 ShouldNotReachHere();
2210 }
2211
2212 } else if (right->is_constant()) {
2213 // cpu register - constant
2214 #ifdef _LP64
2215 jlong c = right->as_constant_ptr()->as_jlong_bits();
2216 __ movptr(r10, (intptr_t) c);
2217 switch (code) {
2218 case lir_add:
2219 __ addptr(lreg_lo, r10);
2220 break;
2221 case lir_sub:
2222 __ subptr(lreg_lo, r10);
2223 break;
2224 default:
2225 ShouldNotReachHere();
2226 }
2227 #else
2228 jint c_lo = right->as_constant_ptr()->as_jint_lo();
2229 jint c_hi = right->as_constant_ptr()->as_jint_hi();
2230 switch (code) {
2231 case lir_add:
2232 __ addptr(lreg_lo, c_lo);
2233 __ adcl(lreg_hi, c_hi);
2234 break;
2235 case lir_sub:
2236 __ subptr(lreg_lo, c_lo);
2237 __ sbbl(lreg_hi, c_hi);
2238 break;
2239 default:
2240 ShouldNotReachHere();
2241 }
2242 #endif // _LP64
2243
2244 } else {
2245 ShouldNotReachHere();
2246 }
2247
2248 } else if (left->is_single_xmm()) {
2249 assert(left == dest, "left and dest must be equal");
2250 XMMRegister lreg = left->as_xmm_float_reg();
2251
2252 if (right->is_single_xmm()) {
2253 XMMRegister rreg = right->as_xmm_float_reg();
2254 switch (code) {
2255 case lir_add: __ addss(lreg, rreg); break;
2256 case lir_sub: __ subss(lreg, rreg); break;
2257 case lir_mul_strictfp: // fall through
2258 case lir_mul: __ mulss(lreg, rreg); break;
2259 case lir_div_strictfp: // fall through
2260 case lir_div: __ divss(lreg, rreg); break;
2261 default: ShouldNotReachHere();
2262 }
2263 } else {
2264 Address raddr;
2265 if (right->is_single_stack()) {
2266 raddr = frame_map()->address_for_slot(right->single_stack_ix());
2267 } else if (right->is_constant()) {
2268 // hack for now
2269 raddr = __ as_Address(InternalAddress(float_constant(right->as_jfloat())));
2270 } else {
2271 ShouldNotReachHere();
2272 }
2273 switch (code) {
2274 case lir_add: __ addss(lreg, raddr); break;
2275 case lir_sub: __ subss(lreg, raddr); break;
2276 case lir_mul_strictfp: // fall through
2277 case lir_mul: __ mulss(lreg, raddr); break;
2278 case lir_div_strictfp: // fall through
2279 case lir_div: __ divss(lreg, raddr); break;
2280 default: ShouldNotReachHere();
2281 }
2282 }
2283
2284 } else if (left->is_double_xmm()) {
2285 assert(left == dest, "left and dest must be equal");
2286
2287 XMMRegister lreg = left->as_xmm_double_reg();
2288 if (right->is_double_xmm()) {
2289 XMMRegister rreg = right->as_xmm_double_reg();
2290 switch (code) {
2291 case lir_add: __ addsd(lreg, rreg); break;
2292 case lir_sub: __ subsd(lreg, rreg); break;
2293 case lir_mul_strictfp: // fall through
2294 case lir_mul: __ mulsd(lreg, rreg); break;
2295 case lir_div_strictfp: // fall through
2296 case lir_div: __ divsd(lreg, rreg); break;
2297 default: ShouldNotReachHere();
2298 }
2299 } else {
2300 Address raddr;
2301 if (right->is_double_stack()) {
2302 raddr = frame_map()->address_for_slot(right->double_stack_ix());
2303 } else if (right->is_constant()) {
2304 // hack for now
2305 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble())));
2306 } else {
2307 ShouldNotReachHere();
2308 }
2309 switch (code) {
2310 case lir_add: __ addsd(lreg, raddr); break;
2311 case lir_sub: __ subsd(lreg, raddr); break;
2312 case lir_mul_strictfp: // fall through
2313 case lir_mul: __ mulsd(lreg, raddr); break;
2314 case lir_div_strictfp: // fall through
2315 case lir_div: __ divsd(lreg, raddr); break;
2316 default: ShouldNotReachHere();
2317 }
2318 }
2319
2320 } else if (left->is_single_fpu()) {
2321 assert(dest->is_single_fpu(), "fpu stack allocation required");
2322
2323 if (right->is_single_fpu()) {
2324 arith_fpu_implementation(code, left->fpu_regnr(), right->fpu_regnr(), dest->fpu_regnr(), pop_fpu_stack);
2325
2326 } else {
2327 assert(left->fpu_regnr() == 0, "left must be on TOS");
2328 assert(dest->fpu_regnr() == 0, "dest must be on TOS");
2329
2330 Address raddr;
2331 if (right->is_single_stack()) {
2332 raddr = frame_map()->address_for_slot(right->single_stack_ix());
2333 } else if (right->is_constant()) {
2334 address const_addr = float_constant(right->as_jfloat());
2335 assert(const_addr != NULL, "incorrect float/double constant maintainance");
2336 // hack for now
2337 raddr = __ as_Address(InternalAddress(const_addr));
2338 } else {
2339 ShouldNotReachHere();
2340 }
2341
2342 switch (code) {
2343 case lir_add: __ fadd_s(raddr); break;
2344 case lir_sub: __ fsub_s(raddr); break;
2345 case lir_mul_strictfp: // fall through
2346 case lir_mul: __ fmul_s(raddr); break;
2347 case lir_div_strictfp: // fall through
2348 case lir_div: __ fdiv_s(raddr); break;
2349 default: ShouldNotReachHere();
2350 }
2351 }
2352
2353 } else if (left->is_double_fpu()) {
2354 assert(dest->is_double_fpu(), "fpu stack allocation required");
2355
2356 if (code == lir_mul_strictfp || code == lir_div_strictfp) {
2357 // Double values require special handling for strictfp mul/div on x86
2358 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1()));
2359 __ fmulp(left->fpu_regnrLo() + 1);
2360 }
2361
2362 if (right->is_double_fpu()) {
2363 arith_fpu_implementation(code, left->fpu_regnrLo(), right->fpu_regnrLo(), dest->fpu_regnrLo(), pop_fpu_stack);
2364
2365 } else {
2366 assert(left->fpu_regnrLo() == 0, "left must be on TOS");
2367 assert(dest->fpu_regnrLo() == 0, "dest must be on TOS");
2368
2369 Address raddr;
2370 if (right->is_double_stack()) {
2371 raddr = frame_map()->address_for_slot(right->double_stack_ix());
2372 } else if (right->is_constant()) {
2373 // hack for now
2374 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble())));
2375 } else {
2376 ShouldNotReachHere();
2377 }
2378
2379 switch (code) {
2380 case lir_add: __ fadd_d(raddr); break;
2381 case lir_sub: __ fsub_d(raddr); break;
2382 case lir_mul_strictfp: // fall through
2383 case lir_mul: __ fmul_d(raddr); break;
2384 case lir_div_strictfp: // fall through
2385 case lir_div: __ fdiv_d(raddr); break;
2386 default: ShouldNotReachHere();
2387 }
2388 }
2389
2390 if (code == lir_mul_strictfp || code == lir_div_strictfp) {
2391 // Double values require special handling for strictfp mul/div on x86
2392 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2()));
2393 __ fmulp(dest->fpu_regnrLo() + 1);
2394 }
2395
2396 } else if (left->is_single_stack() || left->is_address()) {
2397 assert(left == dest, "left and dest must be equal");
2398
2399 Address laddr;
2400 if (left->is_single_stack()) {
2401 laddr = frame_map()->address_for_slot(left->single_stack_ix());
2402 } else if (left->is_address()) {
2403 laddr = as_Address(left->as_address_ptr());
2404 } else {
2405 ShouldNotReachHere();
2406 }
2407
2408 if (right->is_single_cpu()) {
2409 Register rreg = right->as_register();
2410 switch (code) {
2411 case lir_add: __ addl(laddr, rreg); break;
2412 case lir_sub: __ subl(laddr, rreg); break;
2413 default: ShouldNotReachHere();
2414 }
2415 } else if (right->is_constant()) {
2416 jint c = right->as_constant_ptr()->as_jint();
2417 switch (code) {
2418 case lir_add: {
2419 __ incrementl(laddr, c);
2420 break;
2421 }
2422 case lir_sub: {
2423 __ decrementl(laddr, c);
2424 break;
2425 }
2426 default: ShouldNotReachHere();
2427 }
2428 } else {
2429 ShouldNotReachHere();
2430 }
2431
2432 } else {
2433 ShouldNotReachHere();
2434 }
2435 }
2436
2437 void LIR_Assembler::arith_fpu_implementation(LIR_Code code, int left_index, int right_index, int dest_index, bool pop_fpu_stack) {
2438 assert(pop_fpu_stack || (left_index == dest_index || right_index == dest_index), "invalid LIR");
2439 assert(!pop_fpu_stack || (left_index - 1 == dest_index || right_index - 1 == dest_index), "invalid LIR");
2440 assert(left_index == 0 || right_index == 0, "either must be on top of stack");
2441
2442 bool left_is_tos = (left_index == 0);
2443 bool dest_is_tos = (dest_index == 0);
2444 int non_tos_index = (left_is_tos ? right_index : left_index);
2445
2446 switch (code) {
2447 case lir_add:
2448 if (pop_fpu_stack) __ faddp(non_tos_index);
2449 else if (dest_is_tos) __ fadd (non_tos_index);
2450 else __ fadda(non_tos_index);
2451 break;
2452
2453 case lir_sub:
2454 if (left_is_tos) {
2455 if (pop_fpu_stack) __ fsubrp(non_tos_index);
2456 else if (dest_is_tos) __ fsub (non_tos_index);
2457 else __ fsubra(non_tos_index);
2458 } else {
2459 if (pop_fpu_stack) __ fsubp (non_tos_index);
2460 else if (dest_is_tos) __ fsubr (non_tos_index);
2461 else __ fsuba (non_tos_index);
2462 }
2463 break;
2464
2465 case lir_mul_strictfp: // fall through
2466 case lir_mul:
2467 if (pop_fpu_stack) __ fmulp(non_tos_index);
2468 else if (dest_is_tos) __ fmul (non_tos_index);
2469 else __ fmula(non_tos_index);
2470 break;
2471
2472 case lir_div_strictfp: // fall through
2473 case lir_div:
2474 if (left_is_tos) {
2475 if (pop_fpu_stack) __ fdivrp(non_tos_index);
2476 else if (dest_is_tos) __ fdiv (non_tos_index);
2477 else __ fdivra(non_tos_index);
2478 } else {
2479 if (pop_fpu_stack) __ fdivp (non_tos_index);
2480 else if (dest_is_tos) __ fdivr (non_tos_index);
2481 else __ fdiva (non_tos_index);
2482 }
2483 break;
2484
2485 case lir_rem:
2486 assert(left_is_tos && dest_is_tos && right_index == 1, "must be guaranteed by FPU stack allocation");
2487 __ fremr(noreg);
2488 break;
2489
2490 default:
2491 ShouldNotReachHere();
2492 }
2493 }
2494
2495
2496 void LIR_Assembler::intrinsic_op(LIR_Code code, LIR_Opr value, LIR_Opr unused, LIR_Opr dest, LIR_Op* op) {
2497 if (value->is_double_xmm()) {
2498 switch(code) {
2499 case lir_abs :
2500 {
2501 if (dest->as_xmm_double_reg() != value->as_xmm_double_reg()) {
2502 __ movdbl(dest->as_xmm_double_reg(), value->as_xmm_double_reg());
2503 }
2504 __ andpd(dest->as_xmm_double_reg(),
2505 ExternalAddress((address)double_signmask_pool));
2506 }
2507 break;
2508
2509 case lir_sqrt: __ sqrtsd(dest->as_xmm_double_reg(), value->as_xmm_double_reg()); break;
2510 // all other intrinsics are not available in the SSE instruction set, so FPU is used
2511 default : ShouldNotReachHere();
2512 }
2513
2514 } else if (value->is_double_fpu()) {
2515 assert(value->fpu_regnrLo() == 0 && dest->fpu_regnrLo() == 0, "both must be on TOS");
2516 switch(code) {
2517 case lir_log : __ flog() ; break;
2518 case lir_log10 : __ flog10() ; break;
2519 case lir_abs : __ fabs() ; break;
2520 case lir_sqrt : __ fsqrt(); break;
2521 case lir_sin :
2522 // Should consider not saving rbx, if not necessary
2523 __ trigfunc('s', op->as_Op2()->fpu_stack_size());
2524 break;
2525 case lir_cos :
2526 // Should consider not saving rbx, if not necessary
2527 assert(op->as_Op2()->fpu_stack_size() <= 6, "sin and cos need two free stack slots");
2528 __ trigfunc('c', op->as_Op2()->fpu_stack_size());
2529 break;
2530 case lir_tan :
2531 // Should consider not saving rbx, if not necessary
2532 __ trigfunc('t', op->as_Op2()->fpu_stack_size());
2533 break;
2534 case lir_exp :
2535 __ exp_with_fallback(op->as_Op2()->fpu_stack_size());
2536 break;
2537 case lir_pow :
2538 __ pow_with_fallback(op->as_Op2()->fpu_stack_size());
2539 break;
2540 default : ShouldNotReachHere();
2541 }
2542 } else {
2543 Unimplemented();
2544 }
2545 }
2546
2547 void LIR_Assembler::logic_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst) {
2548 // assert(left->destroys_register(), "check");
2549 if (left->is_single_cpu()) {
2550 Register reg = left->as_register();
2551 if (right->is_constant()) {
2552 int val = right->as_constant_ptr()->as_jint();
2553 switch (code) {
2554 case lir_logic_and: __ andl (reg, val); break;
2555 case lir_logic_or: __ orl (reg, val); break;
2556 case lir_logic_xor: __ xorl (reg, val); break;
2557 default: ShouldNotReachHere();
2558 }
2559 } else if (right->is_stack()) {
2560 // added support for stack operands
2561 Address raddr = frame_map()->address_for_slot(right->single_stack_ix());
2562 switch (code) {
2563 case lir_logic_and: __ andl (reg, raddr); break;
2564 case lir_logic_or: __ orl (reg, raddr); break;
2565 case lir_logic_xor: __ xorl (reg, raddr); break;
2566 default: ShouldNotReachHere();
2567 }
2568 } else {
2569 Register rright = right->as_register();
2570 switch (code) {
2571 case lir_logic_and: __ andptr (reg, rright); break;
2572 case lir_logic_or : __ orptr (reg, rright); break;
2573 case lir_logic_xor: __ xorptr (reg, rright); break;
2574 default: ShouldNotReachHere();
2575 }
2576 }
2577 move_regs(reg, dst->as_register());
2578 } else {
2579 Register l_lo = left->as_register_lo();
2580 Register l_hi = left->as_register_hi();
2581 if (right->is_constant()) {
2582 #ifdef _LP64
2583 __ mov64(rscratch1, right->as_constant_ptr()->as_jlong());
2584 switch (code) {
2585 case lir_logic_and:
2586 __ andq(l_lo, rscratch1);
2587 break;
2588 case lir_logic_or:
2589 __ orq(l_lo, rscratch1);
2590 break;
2591 case lir_logic_xor:
2592 __ xorq(l_lo, rscratch1);
2593 break;
2594 default: ShouldNotReachHere();
2595 }
2596 #else
2597 int r_lo = right->as_constant_ptr()->as_jint_lo();
2598 int r_hi = right->as_constant_ptr()->as_jint_hi();
2599 switch (code) {
2600 case lir_logic_and:
2601 __ andl(l_lo, r_lo);
2602 __ andl(l_hi, r_hi);
2603 break;
2604 case lir_logic_or:
2605 __ orl(l_lo, r_lo);
2606 __ orl(l_hi, r_hi);
2607 break;
2608 case lir_logic_xor:
2609 __ xorl(l_lo, r_lo);
2610 __ xorl(l_hi, r_hi);
2611 break;
2612 default: ShouldNotReachHere();
2613 }
2614 #endif // _LP64
2615 } else {
2616 #ifdef _LP64
2617 Register r_lo;
2618 if (right->type() == T_OBJECT || right->type() == T_ARRAY) {
2619 r_lo = right->as_register();
2620 } else {
2621 r_lo = right->as_register_lo();
2622 }
2623 #else
2624 Register r_lo = right->as_register_lo();
2625 Register r_hi = right->as_register_hi();
2626 assert(l_lo != r_hi, "overwriting registers");
2627 #endif
2628 switch (code) {
2629 case lir_logic_and:
2630 __ andptr(l_lo, r_lo);
2631 NOT_LP64(__ andptr(l_hi, r_hi);)
2632 break;
2633 case lir_logic_or:
2634 __ orptr(l_lo, r_lo);
2635 NOT_LP64(__ orptr(l_hi, r_hi);)
2636 break;
2637 case lir_logic_xor:
2638 __ xorptr(l_lo, r_lo);
2639 NOT_LP64(__ xorptr(l_hi, r_hi);)
2640 break;
2641 default: ShouldNotReachHere();
2642 }
2643 }
2644
2645 Register dst_lo = dst->as_register_lo();
2646 Register dst_hi = dst->as_register_hi();
2647
2648 #ifdef _LP64
2649 move_regs(l_lo, dst_lo);
2650 #else
2651 if (dst_lo == l_hi) {
2652 assert(dst_hi != l_lo, "overwriting registers");
2653 move_regs(l_hi, dst_hi);
2654 move_regs(l_lo, dst_lo);
2655 } else {
2656 assert(dst_lo != l_hi, "overwriting registers");
2657 move_regs(l_lo, dst_lo);
2658 move_regs(l_hi, dst_hi);
2659 }
2660 #endif // _LP64
2661 }
2662 }
2663
2664
2665 // we assume that rax, and rdx can be overwritten
2666 void LIR_Assembler::arithmetic_idiv(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr temp, LIR_Opr result, CodeEmitInfo* info) {
2667
2668 assert(left->is_single_cpu(), "left must be register");
2669 assert(right->is_single_cpu() || right->is_constant(), "right must be register or constant");
2670 assert(result->is_single_cpu(), "result must be register");
2671
2672 // assert(left->destroys_register(), "check");
2673 // assert(right->destroys_register(), "check");
2674
2675 Register lreg = left->as_register();
2676 Register dreg = result->as_register();
2677
2678 if (right->is_constant()) {
2679 jint divisor = right->as_constant_ptr()->as_jint();
2680 assert(divisor > 0 && is_power_of_2(divisor), "must be");
2681 if (code == lir_idiv) {
2682 assert(lreg == rax, "must be rax,");
2683 assert(temp->as_register() == rdx, "tmp register must be rdx");
2684 __ cdql(); // sign extend into rdx:rax
2685 if (divisor == 2) {
2686 __ subl(lreg, rdx);
2687 } else {
2688 __ andl(rdx, divisor - 1);
2689 __ addl(lreg, rdx);
2690 }
2691 __ sarl(lreg, log2_jint(divisor));
2692 move_regs(lreg, dreg);
2693 } else if (code == lir_irem) {
2694 Label done;
2695 __ mov(dreg, lreg);
2696 __ andl(dreg, 0x80000000 | (divisor - 1));
2697 __ jcc(Assembler::positive, done);
2698 __ decrement(dreg);
2699 __ orl(dreg, ~(divisor - 1));
2700 __ increment(dreg);
2701 __ bind(done);
2702 } else {
2703 ShouldNotReachHere();
2704 }
2705 } else {
2706 Register rreg = right->as_register();
2707 assert(lreg == rax, "left register must be rax,");
2708 assert(rreg != rdx, "right register must not be rdx");
2709 assert(temp->as_register() == rdx, "tmp register must be rdx");
2710
2711 move_regs(lreg, rax);
2712
2713 int idivl_offset = __ corrected_idivl(rreg);
2714 add_debug_info_for_div0(idivl_offset, info);
2715 if (code == lir_irem) {
2716 move_regs(rdx, dreg); // result is in rdx
2717 } else {
2718 move_regs(rax, dreg);
2719 }
2720 }
2721 }
2722
2723
2724 void LIR_Assembler::comp_op(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Op2* op) {
2725 if (opr1->is_single_cpu()) {
2726 Register reg1 = opr1->as_register();
2727 if (opr2->is_single_cpu()) {
2728 // cpu register - cpu register
2729 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) {
2730 __ cmpptr(reg1, opr2->as_register());
2731 } else {
2732 assert(opr2->type() != T_OBJECT && opr2->type() != T_ARRAY, "cmp int, oop?");
2733 __ cmpl(reg1, opr2->as_register());
2734 }
2735 } else if (opr2->is_stack()) {
2736 // cpu register - stack
2737 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) {
2738 __ cmpptr(reg1, frame_map()->address_for_slot(opr2->single_stack_ix()));
2739 } else {
2740 __ cmpl(reg1, frame_map()->address_for_slot(opr2->single_stack_ix()));
2741 }
2742 } else if (opr2->is_constant()) {
2743 // cpu register - constant
2744 LIR_Const* c = opr2->as_constant_ptr();
2745 if (c->type() == T_INT) {
2746 __ cmpl(reg1, c->as_jint());
2747 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) {
2748 // In 64bit oops are single register
2749 jobject o = c->as_jobject();
2750 if (o == NULL) {
2751 __ cmpptr(reg1, (int32_t)NULL_WORD);
2752 } else {
2753 #ifdef _LP64
2754 __ movoop(rscratch1, o);
2755 __ cmpptr(reg1, rscratch1);
2756 #else
2757 __ cmpoop(reg1, c->as_jobject());
2758 #endif // _LP64
2759 }
2760 } else {
2761 fatal(err_msg("unexpected type: %s", basictype_to_str(c->type())));
2762 }
2763 // cpu register - address
2764 } else if (opr2->is_address()) {
2765 if (op->info() != NULL) {
2766 add_debug_info_for_null_check_here(op->info());
2767 }
2768 __ cmpl(reg1, as_Address(opr2->as_address_ptr()));
2769 } else {
2770 ShouldNotReachHere();
2771 }
2772
2773 } else if(opr1->is_double_cpu()) {
2774 Register xlo = opr1->as_register_lo();
2775 Register xhi = opr1->as_register_hi();
2776 if (opr2->is_double_cpu()) {
2777 #ifdef _LP64
2778 __ cmpptr(xlo, opr2->as_register_lo());
2779 #else
2780 // cpu register - cpu register
2781 Register ylo = opr2->as_register_lo();
2782 Register yhi = opr2->as_register_hi();
2783 __ subl(xlo, ylo);
2784 __ sbbl(xhi, yhi);
2785 if (condition == lir_cond_equal || condition == lir_cond_notEqual) {
2786 __ orl(xhi, xlo);
2787 }
2788 #endif // _LP64
2789 } else if (opr2->is_constant()) {
2790 // cpu register - constant 0
2791 assert(opr2->as_jlong() == (jlong)0, "only handles zero");
2792 #ifdef _LP64
2793 __ cmpptr(xlo, (int32_t)opr2->as_jlong());
2794 #else
2795 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "only handles equals case");
2796 __ orl(xhi, xlo);
2797 #endif // _LP64
2798 } else {
2799 ShouldNotReachHere();
2800 }
2801
2802 } else if (opr1->is_single_xmm()) {
2803 XMMRegister reg1 = opr1->as_xmm_float_reg();
2804 if (opr2->is_single_xmm()) {
2805 // xmm register - xmm register
2806 __ ucomiss(reg1, opr2->as_xmm_float_reg());
2807 } else if (opr2->is_stack()) {
2808 // xmm register - stack
2809 __ ucomiss(reg1, frame_map()->address_for_slot(opr2->single_stack_ix()));
2810 } else if (opr2->is_constant()) {
2811 // xmm register - constant
2812 __ ucomiss(reg1, InternalAddress(float_constant(opr2->as_jfloat())));
2813 } else if (opr2->is_address()) {
2814 // xmm register - address
2815 if (op->info() != NULL) {
2816 add_debug_info_for_null_check_here(op->info());
2817 }
2818 __ ucomiss(reg1, as_Address(opr2->as_address_ptr()));
2819 } else {
2820 ShouldNotReachHere();
2821 }
2822
2823 } else if (opr1->is_double_xmm()) {
2824 XMMRegister reg1 = opr1->as_xmm_double_reg();
2825 if (opr2->is_double_xmm()) {
2826 // xmm register - xmm register
2827 __ ucomisd(reg1, opr2->as_xmm_double_reg());
2828 } else if (opr2->is_stack()) {
2829 // xmm register - stack
2830 __ ucomisd(reg1, frame_map()->address_for_slot(opr2->double_stack_ix()));
2831 } else if (opr2->is_constant()) {
2832 // xmm register - constant
2833 __ ucomisd(reg1, InternalAddress(double_constant(opr2->as_jdouble())));
2834 } else if (opr2->is_address()) {
2835 // xmm register - address
2836 if (op->info() != NULL) {
2837 add_debug_info_for_null_check_here(op->info());
2838 }
2839 __ ucomisd(reg1, as_Address(opr2->pointer()->as_address()));
2840 } else {
2841 ShouldNotReachHere();
2842 }
2843
2844 } else if(opr1->is_single_fpu() || opr1->is_double_fpu()) {
2845 assert(opr1->is_fpu_register() && opr1->fpu() == 0, "currently left-hand side must be on TOS (relax this restriction)");
2846 assert(opr2->is_fpu_register(), "both must be registers");
2847 __ fcmp(noreg, opr2->fpu(), op->fpu_pop_count() > 0, op->fpu_pop_count() > 1);
2848
2849 } else if (opr1->is_address() && opr2->is_constant()) {
2850 LIR_Const* c = opr2->as_constant_ptr();
2851 #ifdef _LP64
2852 if (c->type() == T_OBJECT || c->type() == T_ARRAY) {
2853 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "need to reverse");
2854 __ movoop(rscratch1, c->as_jobject());
2855 }
2856 #endif // LP64
2857 if (op->info() != NULL) {
2858 add_debug_info_for_null_check_here(op->info());
2859 }
2860 // special case: address - constant
2861 LIR_Address* addr = opr1->as_address_ptr();
2862 if (c->type() == T_INT) {
2863 __ cmpl(as_Address(addr), c->as_jint());
2864 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) {
2865 #ifdef _LP64
2866 // %%% Make this explode if addr isn't reachable until we figure out a
2867 // better strategy by giving noreg as the temp for as_Address
2868 __ cmpptr(rscratch1, as_Address(addr, noreg));
2869 #else
2870 __ cmpoop(as_Address(addr), c->as_jobject());
2871 #endif // _LP64
2872 } else {
2873 ShouldNotReachHere();
2874 }
2875
2876 } else {
2877 ShouldNotReachHere();
2878 }
2879 }
2880
2881 void LIR_Assembler::comp_fl2i(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst, LIR_Op2* op) {
2882 if (code == lir_cmp_fd2i || code == lir_ucmp_fd2i) {
2883 if (left->is_single_xmm()) {
2884 assert(right->is_single_xmm(), "must match");
2885 __ cmpss2int(left->as_xmm_float_reg(), right->as_xmm_float_reg(), dst->as_register(), code == lir_ucmp_fd2i);
2886 } else if (left->is_double_xmm()) {
2887 assert(right->is_double_xmm(), "must match");
2888 __ cmpsd2int(left->as_xmm_double_reg(), right->as_xmm_double_reg(), dst->as_register(), code == lir_ucmp_fd2i);
2889
2890 } else {
2891 assert(left->is_single_fpu() || left->is_double_fpu(), "must be");
2892 assert(right->is_single_fpu() || right->is_double_fpu(), "must match");
2893
2894 assert(left->fpu() == 0, "left must be on TOS");
2895 __ fcmp2int(dst->as_register(), code == lir_ucmp_fd2i, right->fpu(),
2896 op->fpu_pop_count() > 0, op->fpu_pop_count() > 1);
2897 }
2898 } else {
2899 assert(code == lir_cmp_l2i, "check");
2900 #ifdef _LP64
2901 Label done;
2902 Register dest = dst->as_register();
2903 __ cmpptr(left->as_register_lo(), right->as_register_lo());
2904 __ movl(dest, -1);
2905 __ jccb(Assembler::less, done);
2906 __ set_byte_if_not_zero(dest);
2907 __ movzbl(dest, dest);
2908 __ bind(done);
2909 #else
2910 __ lcmp2int(left->as_register_hi(),
2911 left->as_register_lo(),
2912 right->as_register_hi(),
2913 right->as_register_lo());
2914 move_regs(left->as_register_hi(), dst->as_register());
2915 #endif // _LP64
2916 }
2917 }
2918
2919
2920 void LIR_Assembler::align_call(LIR_Code code) {
2921 if (os::is_MP()) {
2922 // make sure that the displacement word of the call ends up word aligned
2923 int offset = __ offset();
2924 switch (code) {
2925 case lir_static_call:
2926 case lir_optvirtual_call:
2927 case lir_dynamic_call:
2928 offset += NativeCall::displacement_offset;
2929 break;
2930 case lir_icvirtual_call:
2931 offset += NativeCall::displacement_offset + NativeMovConstReg::instruction_size;
2932 break;
2933 case lir_virtual_call: // currently, sparc-specific for niagara
2934 default: ShouldNotReachHere();
2935 }
2936 while (offset++ % BytesPerWord != 0) {
2937 __ nop();
2938 }
2939 }
2940 }
2941
2942
2943 void LIR_Assembler::call(LIR_OpJavaCall* op, relocInfo::relocType rtype) {
2944 assert(!os::is_MP() || (__ offset() + NativeCall::displacement_offset) % BytesPerWord == 0,
2945 "must be aligned");
2946 __ call(AddressLiteral(op->addr(), rtype));
2947 add_call_info(code_offset(), op->info());
2948 }
2949
2950
2951 void LIR_Assembler::ic_call(LIR_OpJavaCall* op) {
2952 __ ic_call(op->addr());
2953 add_call_info(code_offset(), op->info());
2954 assert(!os::is_MP() ||
2955 (__ offset() - NativeCall::instruction_size + NativeCall::displacement_offset) % BytesPerWord == 0,
2956 "must be aligned");
2957 }
2958
2959
2960 /* Currently, vtable-dispatch is only enabled for sparc platforms */
2961 void LIR_Assembler::vtable_call(LIR_OpJavaCall* op) {
2962 ShouldNotReachHere();
2963 }
2964
2965
2966 void LIR_Assembler::emit_static_call_stub() {
2967 address call_pc = __ pc();
2968 address stub = __ start_a_stub(call_stub_size);
2969 if (stub == NULL) {
2970 bailout("static call stub overflow");
2971 return;
2972 }
2973
2974 int start = __ offset();
2975 if (os::is_MP()) {
2976 // make sure that the displacement word of the call ends up word aligned
2977 int offset = __ offset() + NativeMovConstReg::instruction_size + NativeCall::displacement_offset;
2978 while (offset++ % BytesPerWord != 0) {
2979 __ nop();
2980 }
2981 }
2982 __ relocate(static_stub_Relocation::spec(call_pc));
2983 __ mov_metadata(rbx, (Metadata*)NULL);
2984 // must be set to -1 at code generation time
2985 assert(!os::is_MP() || ((__ offset() + 1) % BytesPerWord) == 0, "must be aligned on MP");
2986 // On 64bit this will die since it will take a movq & jmp, must be only a jmp
2987 __ jump(RuntimeAddress(__ pc()));
2988
2989 assert(__ offset() - start <= call_stub_size, "stub too big");
2990 __ end_a_stub();
2991 }
2992
2993
2994 void LIR_Assembler::throw_op(LIR_Opr exceptionPC, LIR_Opr exceptionOop, CodeEmitInfo* info) {
2995 assert(exceptionOop->as_register() == rax, "must match");
2996 assert(exceptionPC->as_register() == rdx, "must match");
2997
2998 // exception object is not added to oop map by LinearScan
2999 // (LinearScan assumes that no oops are in fixed registers)
3000 info->add_register_oop(exceptionOop);
3001 Runtime1::StubID unwind_id;
3002
3003 // get current pc information
3004 // pc is only needed if the method has an exception handler, the unwind code does not need it.
3005 int pc_for_athrow_offset = __ offset();
3006 InternalAddress pc_for_athrow(__ pc());
3007 __ lea(exceptionPC->as_register(), pc_for_athrow);
3008 add_call_info(pc_for_athrow_offset, info); // for exception handler
3009
3010 __ verify_not_null_oop(rax);
3011 // search an exception handler (rax: exception oop, rdx: throwing pc)
3012 if (compilation()->has_fpu_code()) {
3013 unwind_id = Runtime1::handle_exception_id;
3014 } else {
3015 unwind_id = Runtime1::handle_exception_nofpu_id;
3016 }
3017 __ call(RuntimeAddress(Runtime1::entry_for(unwind_id)));
3018
3019 // enough room for two byte trap
3020 __ nop();
3021 }
3022
3023
3024 void LIR_Assembler::unwind_op(LIR_Opr exceptionOop) {
3025 assert(exceptionOop->as_register() == rax, "must match");
3026
3027 __ jmp(_unwind_handler_entry);
3028 }
3029
3030
3031 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, LIR_Opr count, LIR_Opr dest, LIR_Opr tmp) {
3032
3033 // optimized version for linear scan:
3034 // * count must be already in ECX (guaranteed by LinearScan)
3035 // * left and dest must be equal
3036 // * tmp must be unused
3037 assert(count->as_register() == SHIFT_count, "count must be in ECX");
3038 assert(left == dest, "left and dest must be equal");
3039 assert(tmp->is_illegal(), "wasting a register if tmp is allocated");
3040
3041 if (left->is_single_cpu()) {
3042 Register value = left->as_register();
3043 assert(value != SHIFT_count, "left cannot be ECX");
3044
3045 switch (code) {
3046 case lir_shl: __ shll(value); break;
3047 case lir_shr: __ sarl(value); break;
3048 case lir_ushr: __ shrl(value); break;
3049 default: ShouldNotReachHere();
3050 }
3051 } else if (left->is_double_cpu()) {
3052 Register lo = left->as_register_lo();
3053 Register hi = left->as_register_hi();
3054 assert(lo != SHIFT_count && hi != SHIFT_count, "left cannot be ECX");
3055 #ifdef _LP64
3056 switch (code) {
3057 case lir_shl: __ shlptr(lo); break;
3058 case lir_shr: __ sarptr(lo); break;
3059 case lir_ushr: __ shrptr(lo); break;
3060 default: ShouldNotReachHere();
3061 }
3062 #else
3063
3064 switch (code) {
3065 case lir_shl: __ lshl(hi, lo); break;
3066 case lir_shr: __ lshr(hi, lo, true); break;
3067 case lir_ushr: __ lshr(hi, lo, false); break;
3068 default: ShouldNotReachHere();
3069 }
3070 #endif // LP64
3071 } else {
3072 ShouldNotReachHere();
3073 }
3074 }
3075
3076
3077 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, jint count, LIR_Opr dest) {
3078 if (dest->is_single_cpu()) {
3079 // first move left into dest so that left is not destroyed by the shift
3080 Register value = dest->as_register();
3081 count = count & 0x1F; // Java spec
3082
3083 move_regs(left->as_register(), value);
3084 switch (code) {
3085 case lir_shl: __ shll(value, count); break;
3086 case lir_shr: __ sarl(value, count); break;
3087 case lir_ushr: __ shrl(value, count); break;
3088 default: ShouldNotReachHere();
3089 }
3090 } else if (dest->is_double_cpu()) {
3091 #ifndef _LP64
3092 Unimplemented();
3093 #else
3094 // first move left into dest so that left is not destroyed by the shift
3095 Register value = dest->as_register_lo();
3096 count = count & 0x1F; // Java spec
3097
3098 move_regs(left->as_register_lo(), value);
3099 switch (code) {
3100 case lir_shl: __ shlptr(value, count); break;
3101 case lir_shr: __ sarptr(value, count); break;
3102 case lir_ushr: __ shrptr(value, count); break;
3103 default: ShouldNotReachHere();
3104 }
3105 #endif // _LP64
3106 } else {
3107 ShouldNotReachHere();
3108 }
3109 }
3110
3111
3112 void LIR_Assembler::store_parameter(Register r, int offset_from_rsp_in_words) {
3113 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
3114 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
3115 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
3116 __ movptr (Address(rsp, offset_from_rsp_in_bytes), r);
3117 }
3118
3119
3120 void LIR_Assembler::store_parameter(jint c, int offset_from_rsp_in_words) {
3121 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
3122 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
3123 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
3124 __ movptr (Address(rsp, offset_from_rsp_in_bytes), c);
3125 }
3126
3127
3128 void LIR_Assembler::store_parameter(jobject o, int offset_from_rsp_in_words) {
3129 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
3130 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
3131 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
3132 __ movoop (Address(rsp, offset_from_rsp_in_bytes), o);
3133 }
3134
3135
3136 // This code replaces a call to arraycopy; no exception may
3137 // be thrown in this code, they must be thrown in the System.arraycopy
3138 // activation frame; we could save some checks if this would not be the case
3139 void LIR_Assembler::emit_arraycopy(LIR_OpArrayCopy* op) {
3140 ciArrayKlass* default_type = op->expected_type();
3141 Register src = op->src()->as_register();
3142 Register dst = op->dst()->as_register();
3143 Register src_pos = op->src_pos()->as_register();
3144 Register dst_pos = op->dst_pos()->as_register();
3145 Register length = op->length()->as_register();
3146 Register tmp = op->tmp()->as_register();
3147
3148 CodeStub* stub = op->stub();
3149 int flags = op->flags();
3150 BasicType basic_type = default_type != NULL ? default_type->element_type()->basic_type() : T_ILLEGAL;
3151 if (basic_type == T_ARRAY) basic_type = T_OBJECT;
3152
3153 // if we don't know anything, just go through the generic arraycopy
3154 if (default_type == NULL) {
3155 Label done;
3156 // save outgoing arguments on stack in case call to System.arraycopy is needed
3157 // HACK ALERT. This code used to push the parameters in a hardwired fashion
3158 // for interpreter calling conventions. Now we have to do it in new style conventions.
3159 // For the moment until C1 gets the new register allocator I just force all the
3160 // args to the right place (except the register args) and then on the back side
3161 // reload the register args properly if we go slow path. Yuck
3162
3163 // These are proper for the calling convention
3164 store_parameter(length, 2);
3165 store_parameter(dst_pos, 1);
3166 store_parameter(dst, 0);
3167
3168 // these are just temporary placements until we need to reload
3169 store_parameter(src_pos, 3);
3170 store_parameter(src, 4);
3171 NOT_LP64(assert(src == rcx && src_pos == rdx, "mismatch in calling convention");)
3172
3173 address C_entry = CAST_FROM_FN_PTR(address, Runtime1::arraycopy);
3174
3175 address copyfunc_addr = StubRoutines::generic_arraycopy();
3176
3177 // pass arguments: may push as this is not a safepoint; SP must be fix at each safepoint
3178 #ifdef _LP64
3179 // The arguments are in java calling convention so we can trivially shift them to C
3180 // convention
3181 assert_different_registers(c_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4);
3182 __ mov(c_rarg0, j_rarg0);
3183 assert_different_registers(c_rarg1, j_rarg2, j_rarg3, j_rarg4);
3184 __ mov(c_rarg1, j_rarg1);
3185 assert_different_registers(c_rarg2, j_rarg3, j_rarg4);
3186 __ mov(c_rarg2, j_rarg2);
3187 assert_different_registers(c_rarg3, j_rarg4);
3188 __ mov(c_rarg3, j_rarg3);
3189 #ifdef _WIN64
3190 // Allocate abi space for args but be sure to keep stack aligned
3191 __ subptr(rsp, 6*wordSize);
3192 store_parameter(j_rarg4, 4);
3193 if (copyfunc_addr == NULL) { // Use C version if stub was not generated
3194 __ call(RuntimeAddress(C_entry));
3195 } else {
3196 #ifndef PRODUCT
3197 if (PrintC1Statistics) {
3198 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt));
3199 }
3200 #endif
3201 __ call(RuntimeAddress(copyfunc_addr));
3202 }
3203 __ addptr(rsp, 6*wordSize);
3204 #else
3205 __ mov(c_rarg4, j_rarg4);
3206 if (copyfunc_addr == NULL) { // Use C version if stub was not generated
3207 __ call(RuntimeAddress(C_entry));
3208 } else {
3209 #ifndef PRODUCT
3210 if (PrintC1Statistics) {
3211 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt));
3212 }
3213 #endif
3214 __ call(RuntimeAddress(copyfunc_addr));
3215 }
3216 #endif // _WIN64
3217 #else
3218 __ push(length);
3219 __ push(dst_pos);
3220 __ push(dst);
3221 __ push(src_pos);
3222 __ push(src);
3223
3224 if (copyfunc_addr == NULL) { // Use C version if stub was not generated
3225 __ call_VM_leaf(C_entry, 5); // removes pushed parameter from the stack
3226 } else {
3227 #ifndef PRODUCT
3228 if (PrintC1Statistics) {
3229 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt));
3230 }
3231 #endif
3232 __ call_VM_leaf(copyfunc_addr, 5); // removes pushed parameter from the stack
3233 }
3234
3235 #endif // _LP64
3236
3237 __ cmpl(rax, 0);
3238 __ jcc(Assembler::equal, *stub->continuation());
3239
3240 if (copyfunc_addr != NULL) {
3241 __ mov(tmp, rax);
3242 __ xorl(tmp, -1);
3243 }
3244
3245 // Reload values from the stack so they are where the stub
3246 // expects them.
3247 __ movptr (dst, Address(rsp, 0*BytesPerWord));
3248 __ movptr (dst_pos, Address(rsp, 1*BytesPerWord));
3249 __ movptr (length, Address(rsp, 2*BytesPerWord));
3250 __ movptr (src_pos, Address(rsp, 3*BytesPerWord));
3251 __ movptr (src, Address(rsp, 4*BytesPerWord));
3252
3253 if (copyfunc_addr != NULL) {
3254 __ subl(length, tmp);
3255 __ addl(src_pos, tmp);
3256 __ addl(dst_pos, tmp);
3257 }
3258 __ jmp(*stub->entry());
3259
3260 __ bind(*stub->continuation());
3261 return;
3262 }
3263
3264 assert(default_type != NULL && default_type->is_array_klass() && default_type->is_loaded(), "must be true at this point");
3265
3266 int elem_size = type2aelembytes(basic_type);
3267 Address::ScaleFactor scale;
3268
3269 switch (elem_size) {
3270 case 1 :
3271 scale = Address::times_1;
3272 break;
3273 case 2 :
3274 scale = Address::times_2;
3275 break;
3276 case 4 :
3277 scale = Address::times_4;
3278 break;
3279 case 8 :
3280 scale = Address::times_8;
3281 break;
3282 default:
3283 scale = Address::no_scale;
3284 ShouldNotReachHere();
3285 }
3286
3287 Address src_length_addr = Address(src, arrayOopDesc::length_offset_in_bytes());
3288 Address dst_length_addr = Address(dst, arrayOopDesc::length_offset_in_bytes());
3289 Address src_klass_addr = Address(src, oopDesc::klass_offset_in_bytes());
3290 Address dst_klass_addr = Address(dst, oopDesc::klass_offset_in_bytes());
3291
3292 // length and pos's are all sign extended at this point on 64bit
3293
3294 // test for NULL
3295 if (flags & LIR_OpArrayCopy::src_null_check) {
3296 __ testptr(src, src);
3297 __ jcc(Assembler::zero, *stub->entry());
3298 }
3299 if (flags & LIR_OpArrayCopy::dst_null_check) {
3300 __ testptr(dst, dst);
3301 __ jcc(Assembler::zero, *stub->entry());
3302 }
3303
3304 // If the compiler was not able to prove that exact type of the source or the destination
3305 // of the arraycopy is an array type, check at runtime if the source or the destination is
3306 // an instance type.
3307 if (flags & LIR_OpArrayCopy::type_check) {
3308 if (!(flags & LIR_OpArrayCopy::dst_objarray)) {
3309 __ load_klass(tmp, dst);
3310 __ cmpl(Address(tmp, in_bytes(Klass::layout_helper_offset())), Klass::_lh_neutral_value);
3311 __ jcc(Assembler::greaterEqual, *stub->entry());
3312 }
3313
3314 if (!(flags & LIR_OpArrayCopy::src_objarray)) {
3315 __ load_klass(tmp, src);
3316 __ cmpl(Address(tmp, in_bytes(Klass::layout_helper_offset())), Klass::_lh_neutral_value);
3317 __ jcc(Assembler::greaterEqual, *stub->entry());
3318 }
3319 }
3320
3321 // check if negative
3322 if (flags & LIR_OpArrayCopy::src_pos_positive_check) {
3323 __ testl(src_pos, src_pos);
3324 __ jcc(Assembler::less, *stub->entry());
3325 }
3326 if (flags & LIR_OpArrayCopy::dst_pos_positive_check) {
3327 __ testl(dst_pos, dst_pos);
3328 __ jcc(Assembler::less, *stub->entry());
3329 }
3330
3331 if (flags & LIR_OpArrayCopy::src_range_check) {
3332 __ lea(tmp, Address(src_pos, length, Address::times_1, 0));
3333 __ cmpl(tmp, src_length_addr);
3334 __ jcc(Assembler::above, *stub->entry());
3335 }
3336 if (flags & LIR_OpArrayCopy::dst_range_check) {
3337 __ lea(tmp, Address(dst_pos, length, Address::times_1, 0));
3338 __ cmpl(tmp, dst_length_addr);
3339 __ jcc(Assembler::above, *stub->entry());
3340 }
3341
3342 if (flags & LIR_OpArrayCopy::length_positive_check) {
3343 __ testl(length, length);
3344 __ jcc(Assembler::less, *stub->entry());
3345 __ jcc(Assembler::zero, *stub->continuation());
3346 }
3347
3348 #ifdef _LP64
3349 __ movl2ptr(src_pos, src_pos); //higher 32bits must be null
3350 __ movl2ptr(dst_pos, dst_pos); //higher 32bits must be null
3351 #endif
3352
3353 if (flags & LIR_OpArrayCopy::type_check) {
3354 // We don't know the array types are compatible
3355 if (basic_type != T_OBJECT) {
3356 // Simple test for basic type arrays
3357 if (UseCompressedClassPointers) {
3358 __ movl(tmp, src_klass_addr);
3359 __ cmpl(tmp, dst_klass_addr);
3360 } else {
3361 __ movptr(tmp, src_klass_addr);
3362 __ cmpptr(tmp, dst_klass_addr);
3363 }
3364 __ jcc(Assembler::notEqual, *stub->entry());
3365 } else {
3366 // For object arrays, if src is a sub class of dst then we can
3367 // safely do the copy.
3368 Label cont, slow;
3369
3370 __ push(src);
3371 __ push(dst);
3372
3373 __ load_klass(src, src);
3374 __ load_klass(dst, dst);
3375
3376 __ check_klass_subtype_fast_path(src, dst, tmp, &cont, &slow, NULL);
3377
3378 __ push(src);
3379 __ push(dst);
3380 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
3381 __ pop(dst);
3382 __ pop(src);
3383
3384 __ cmpl(src, 0);
3385 __ jcc(Assembler::notEqual, cont);
3386
3387 __ bind(slow);
3388 __ pop(dst);
3389 __ pop(src);
3390
3391 address copyfunc_addr = StubRoutines::checkcast_arraycopy();
3392 if (copyfunc_addr != NULL) { // use stub if available
3393 // src is not a sub class of dst so we have to do a
3394 // per-element check.
3395
3396 int mask = LIR_OpArrayCopy::src_objarray|LIR_OpArrayCopy::dst_objarray;
3397 if ((flags & mask) != mask) {
3398 // Check that at least both of them object arrays.
3399 assert(flags & mask, "one of the two should be known to be an object array");
3400
3401 if (!(flags & LIR_OpArrayCopy::src_objarray)) {
3402 __ load_klass(tmp, src);
3403 } else if (!(flags & LIR_OpArrayCopy::dst_objarray)) {
3404 __ load_klass(tmp, dst);
3405 }
3406 int lh_offset = in_bytes(Klass::layout_helper_offset());
3407 Address klass_lh_addr(tmp, lh_offset);
3408 jint objArray_lh = Klass::array_layout_helper(T_OBJECT);
3409 __ cmpl(klass_lh_addr, objArray_lh);
3410 __ jcc(Assembler::notEqual, *stub->entry());
3411 }
3412
3413 // Spill because stubs can use any register they like and it's
3414 // easier to restore just those that we care about.
3415 store_parameter(dst, 0);
3416 store_parameter(dst_pos, 1);
3417 store_parameter(length, 2);
3418 store_parameter(src_pos, 3);
3419 store_parameter(src, 4);
3420
3421 #ifndef _LP64
3422 __ movptr(tmp, dst_klass_addr);
3423 __ movptr(tmp, Address(tmp, ObjArrayKlass::element_klass_offset()));
3424 __ push(tmp);
3425 __ movl(tmp, Address(tmp, Klass::super_check_offset_offset()));
3426 __ push(tmp);
3427 __ push(length);
3428 __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3429 __ push(tmp);
3430 __ lea(tmp, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3431 __ push(tmp);
3432
3433 __ call_VM_leaf(copyfunc_addr, 5);
3434 #else
3435 __ movl2ptr(length, length); //higher 32bits must be null
3436
3437 __ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3438 assert_different_registers(c_rarg0, dst, dst_pos, length);
3439 __ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3440 assert_different_registers(c_rarg1, dst, length);
3441
3442 __ mov(c_rarg2, length);
3443 assert_different_registers(c_rarg2, dst);
3444
3445 #ifdef _WIN64
3446 // Allocate abi space for args but be sure to keep stack aligned
3447 __ subptr(rsp, 6*wordSize);
3448 __ load_klass(c_rarg3, dst);
3449 __ movptr(c_rarg3, Address(c_rarg3, ObjArrayKlass::element_klass_offset()));
3450 store_parameter(c_rarg3, 4);
3451 __ movl(c_rarg3, Address(c_rarg3, Klass::super_check_offset_offset()));
3452 __ call(RuntimeAddress(copyfunc_addr));
3453 __ addptr(rsp, 6*wordSize);
3454 #else
3455 __ load_klass(c_rarg4, dst);
3456 __ movptr(c_rarg4, Address(c_rarg4, ObjArrayKlass::element_klass_offset()));
3457 __ movl(c_rarg3, Address(c_rarg4, Klass::super_check_offset_offset()));
3458 __ call(RuntimeAddress(copyfunc_addr));
3459 #endif
3460
3461 #endif
3462
3463 #ifndef PRODUCT
3464 if (PrintC1Statistics) {
3465 Label failed;
3466 __ testl(rax, rax);
3467 __ jcc(Assembler::notZero, failed);
3468 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_cnt));
3469 __ bind(failed);
3470 }
3471 #endif
3472
3473 __ testl(rax, rax);
3474 __ jcc(Assembler::zero, *stub->continuation());
3475
3476 #ifndef PRODUCT
3477 if (PrintC1Statistics) {
3478 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_attempt_cnt));
3479 }
3480 #endif
3481
3482 __ mov(tmp, rax);
3483
3484 __ xorl(tmp, -1);
3485
3486 // Restore previously spilled arguments
3487 __ movptr (dst, Address(rsp, 0*BytesPerWord));
3488 __ movptr (dst_pos, Address(rsp, 1*BytesPerWord));
3489 __ movptr (length, Address(rsp, 2*BytesPerWord));
3490 __ movptr (src_pos, Address(rsp, 3*BytesPerWord));
3491 __ movptr (src, Address(rsp, 4*BytesPerWord));
3492
3493
3494 __ subl(length, tmp);
3495 __ addl(src_pos, tmp);
3496 __ addl(dst_pos, tmp);
3497 }
3498
3499 __ jmp(*stub->entry());
3500
3501 __ bind(cont);
3502 __ pop(dst);
3503 __ pop(src);
3504 }
3505 }
3506
3507 #ifdef ASSERT
3508 if (basic_type != T_OBJECT || !(flags & LIR_OpArrayCopy::type_check)) {
3509 // Sanity check the known type with the incoming class. For the
3510 // primitive case the types must match exactly with src.klass and
3511 // dst.klass each exactly matching the default type. For the
3512 // object array case, if no type check is needed then either the
3513 // dst type is exactly the expected type and the src type is a
3514 // subtype which we can't check or src is the same array as dst
3515 // but not necessarily exactly of type default_type.
3516 Label known_ok, halt;
3517 __ mov_metadata(tmp, default_type->constant_encoding());
3518 #ifdef _LP64
3519 if (UseCompressedClassPointers) {
3520 __ encode_klass_not_null(tmp);
3521 }
3522 #endif
3523
3524 if (basic_type != T_OBJECT) {
3525
3526 if (UseCompressedClassPointers) __ cmpl(tmp, dst_klass_addr);
3527 else __ cmpptr(tmp, dst_klass_addr);
3528 __ jcc(Assembler::notEqual, halt);
3529 if (UseCompressedClassPointers) __ cmpl(tmp, src_klass_addr);
3530 else __ cmpptr(tmp, src_klass_addr);
3531 __ jcc(Assembler::equal, known_ok);
3532 } else {
3533 if (UseCompressedClassPointers) __ cmpl(tmp, dst_klass_addr);
3534 else __ cmpptr(tmp, dst_klass_addr);
3535 __ jcc(Assembler::equal, known_ok);
3536 __ cmpptr(src, dst);
3537 __ jcc(Assembler::equal, known_ok);
3538 }
3539 __ bind(halt);
3540 __ stop("incorrect type information in arraycopy");
3541 __ bind(known_ok);
3542 }
3543 #endif
3544
3545 #ifndef PRODUCT
3546 if (PrintC1Statistics) {
3547 __ incrementl(ExternalAddress(Runtime1::arraycopy_count_address(basic_type)));
3548 }
3549 #endif
3550
3551 #ifdef _LP64
3552 assert_different_registers(c_rarg0, dst, dst_pos, length);
3553 __ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3554 assert_different_registers(c_rarg1, length);
3555 __ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3556 __ mov(c_rarg2, length);
3557
3558 #else
3559 __ lea(tmp, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3560 store_parameter(tmp, 0);
3561 __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
3562 store_parameter(tmp, 1);
3563 store_parameter(length, 2);
3564 #endif // _LP64
3565
3566 bool disjoint = (flags & LIR_OpArrayCopy::overlapping) == 0;
3567 bool aligned = (flags & LIR_OpArrayCopy::unaligned) == 0;
3568 const char *name;
3569 address entry = StubRoutines::select_arraycopy_function(basic_type, aligned, disjoint, name, false);
3570 __ call_VM_leaf(entry, 0);
3571
3572 __ bind(*stub->continuation());
3573 }
3574
3575 void LIR_Assembler::emit_updatecrc32(LIR_OpUpdateCRC32* op) {
3576 assert(op->crc()->is_single_cpu(), "crc must be register");
3577 assert(op->val()->is_single_cpu(), "byte value must be register");
3578 assert(op->result_opr()->is_single_cpu(), "result must be register");
3579 Register crc = op->crc()->as_register();
3580 Register val = op->val()->as_register();
3581 Register res = op->result_opr()->as_register();
3582
3583 assert_different_registers(val, crc, res);
3584
3585 __ lea(res, ExternalAddress(StubRoutines::crc_table_addr()));
3586 __ notl(crc); // ~crc
3587 __ update_byte_crc32(crc, val, res);
3588 __ notl(crc); // ~crc
3589 __ mov(res, crc);
3590 }
3591
3592 void LIR_Assembler::emit_lock(LIR_OpLock* op) {
3593 Register obj = op->obj_opr()->as_register(); // may not be an oop
3594 Register hdr = op->hdr_opr()->as_register();
3595 Register lock = op->lock_opr()->as_register();
3596 if (!UseFastLocking) {
3597 __ jmp(*op->stub()->entry());
3598 } else if (op->code() == lir_lock) {
3599 Register scratch = noreg;
3600 if (UseBiasedLocking) {
3601 scratch = op->scratch_opr()->as_register();
3602 }
3603 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
3604 // add debug info for NullPointerException only if one is possible
3605 int null_check_offset = __ lock_object(hdr, obj, lock, scratch, *op->stub()->entry());
3606 if (op->info() != NULL) {
3607 add_debug_info_for_null_check(null_check_offset, op->info());
3608 }
3609 // done
3610 } else if (op->code() == lir_unlock) {
3611 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
3612 __ unlock_object(hdr, obj, lock, *op->stub()->entry());
3613 } else {
3614 Unimplemented();
3615 }
3616 __ bind(*op->stub()->continuation());
3617 }
3618
3619
3620 void LIR_Assembler::emit_profile_call(LIR_OpProfileCall* op) {
3621 ciMethod* method = op->profiled_method();
3622 int bci = op->profiled_bci();
3623 ciMethod* callee = op->profiled_callee();
3624
3625 // Update counter for all call types
3626 ciMethodData* md = method->method_data_or_null();
3627 assert(md != NULL, "Sanity");
3628 ciProfileData* data = md->bci_to_data(bci);
3629 assert(data->is_CounterData(), "need CounterData for calls");
3630 assert(op->mdo()->is_single_cpu(), "mdo must be allocated");
3631 Register mdo = op->mdo()->as_register();
3632 __ mov_metadata(mdo, md->constant_encoding());
3633 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
3634 Bytecodes::Code bc = method->java_code_at_bci(bci);
3635 const bool callee_is_static = callee->is_loaded() && callee->is_static();
3636 // Perform additional virtual call profiling for invokevirtual and
3637 // invokeinterface bytecodes
3638 if ((bc == Bytecodes::_invokevirtual || bc == Bytecodes::_invokeinterface) &&
3639 !callee_is_static && // required for optimized MH invokes
3640 C1ProfileVirtualCalls) {
3641 assert(op->recv()->is_single_cpu(), "recv must be allocated");
3642 Register recv = op->recv()->as_register();
3643 assert_different_registers(mdo, recv);
3644 assert(data->is_VirtualCallData(), "need VirtualCallData for virtual calls");
3645 ciKlass* known_klass = op->known_holder();
3646 if (C1OptimizeVirtualCallProfiling && known_klass != NULL) {
3647 // We know the type that will be seen at this call site; we can
3648 // statically update the MethodData* rather than needing to do
3649 // dynamic tests on the receiver type
3650
3651 // NOTE: we should probably put a lock around this search to
3652 // avoid collisions by concurrent compilations
3653 ciVirtualCallData* vc_data = (ciVirtualCallData*) data;
3654 uint i;
3655 for (i = 0; i < VirtualCallData::row_limit(); i++) {
3656 ciKlass* receiver = vc_data->receiver(i);
3657 if (known_klass->equals(receiver)) {
3658 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i)));
3659 __ addptr(data_addr, DataLayout::counter_increment);
3660 return;
3661 }
3662 }
3663
3664 // Receiver type not found in profile data; select an empty slot
3665
3666 // Note that this is less efficient than it should be because it
3667 // always does a write to the receiver part of the
3668 // VirtualCallData rather than just the first time
3669 for (i = 0; i < VirtualCallData::row_limit(); i++) {
3670 ciKlass* receiver = vc_data->receiver(i);
3671 if (receiver == NULL) {
3672 Address recv_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_offset(i)));
3673 __ mov_metadata(recv_addr, known_klass->constant_encoding());
3674 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i)));
3675 __ addptr(data_addr, DataLayout::counter_increment);
3676 return;
3677 }
3678 }
3679 } else {
3680 __ load_klass(recv, recv);
3681 Label update_done;
3682 type_profile_helper(mdo, md, data, recv, &update_done);
3683 // Receiver did not match any saved receiver and there is no empty row for it.
3684 // Increment total counter to indicate polymorphic case.
3685 __ addptr(counter_addr, DataLayout::counter_increment);
3686
3687 __ bind(update_done);
3688 }
3689 } else {
3690 // Static call
3691 __ addptr(counter_addr, DataLayout::counter_increment);
3692 }
3693 }
3694
3695 void LIR_Assembler::emit_profile_type(LIR_OpProfileType* op) {
3696 Register obj = op->obj()->as_register();
3697 Register tmp = op->tmp()->as_pointer_register();
3698 Address mdo_addr = as_Address(op->mdp()->as_address_ptr());
3699 ciKlass* exact_klass = op->exact_klass();
3700 intptr_t current_klass = op->current_klass();
3701 bool not_null = op->not_null();
3702 bool no_conflict = op->no_conflict();
3703
3704 Label update, next, none;
3705
3706 bool do_null = !not_null;
3707 bool exact_klass_set = exact_klass != NULL && ciTypeEntries::valid_ciklass(current_klass) == exact_klass;
3708 bool do_update = !TypeEntries::is_type_unknown(current_klass) && !exact_klass_set;
3709
3710 assert(do_null || do_update, "why are we here?");
3711 assert(!TypeEntries::was_null_seen(current_klass) || do_update, "why are we here?");
3712
3713 __ verify_oop(obj);
3714
3715 if (tmp != obj) {
3716 __ mov(tmp, obj);
3717 }
3718 if (do_null) {
3719 __ testptr(tmp, tmp);
3720 __ jccb(Assembler::notZero, update);
3721 if (!TypeEntries::was_null_seen(current_klass)) {
3722 __ orptr(mdo_addr, TypeEntries::null_seen);
3723 }
3724 if (do_update) {
3725 #ifndef ASSERT
3726 __ jmpb(next);
3727 }
3728 #else
3729 __ jmp(next);
3730 }
3731 } else {
3732 __ testptr(tmp, tmp);
3733 __ jccb(Assembler::notZero, update);
3734 __ stop("unexpect null obj");
3735 #endif
3736 }
3737
3738 __ bind(update);
3739
3740 if (do_update) {
3741 #ifdef ASSERT
3742 if (exact_klass != NULL) {
3743 Label ok;
3744 __ load_klass(tmp, tmp);
3745 __ push(tmp);
3746 __ mov_metadata(tmp, exact_klass->constant_encoding());
3747 __ cmpptr(tmp, Address(rsp, 0));
3748 __ jccb(Assembler::equal, ok);
3749 __ stop("exact klass and actual klass differ");
3750 __ bind(ok);
3751 __ pop(tmp);
3752 }
3753 #endif
3754 if (!no_conflict) {
3755 if (exact_klass == NULL || TypeEntries::is_type_none(current_klass)) {
3756 if (exact_klass != NULL) {
3757 __ mov_metadata(tmp, exact_klass->constant_encoding());
3758 } else {
3759 __ load_klass(tmp, tmp);
3760 }
3761
3762 __ xorptr(tmp, mdo_addr);
3763 __ testptr(tmp, TypeEntries::type_klass_mask);
3764 // klass seen before, nothing to do. The unknown bit may have been
3765 // set already but no need to check.
3766 __ jccb(Assembler::zero, next);
3767
3768 __ testptr(tmp, TypeEntries::type_unknown);
3769 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
3770
3771 if (TypeEntries::is_type_none(current_klass)) {
3772 __ cmpptr(mdo_addr, 0);
3773 __ jccb(Assembler::equal, none);
3774 __ cmpptr(mdo_addr, TypeEntries::null_seen);
3775 __ jccb(Assembler::equal, none);
3776 // There is a chance that the checks above (re-reading profiling
3777 // data from memory) fail if another thread has just set the
3778 // profiling to this obj's klass
3779 __ xorptr(tmp, mdo_addr);
3780 __ testptr(tmp, TypeEntries::type_klass_mask);
3781 __ jccb(Assembler::zero, next);
3782 }
3783 } else {
3784 assert(ciTypeEntries::valid_ciklass(current_klass) != NULL &&
3785 ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "conflict only");
3786
3787 __ movptr(tmp, mdo_addr);
3788 __ testptr(tmp, TypeEntries::type_unknown);
3789 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
3790 }
3791
3792 // different than before. Cannot keep accurate profile.
3793 __ orptr(mdo_addr, TypeEntries::type_unknown);
3794
3795 if (TypeEntries::is_type_none(current_klass)) {
3796 __ jmpb(next);
3797
3798 __ bind(none);
3799 // first time here. Set profile type.
3800 __ movptr(mdo_addr, tmp);
3801 }
3802 } else {
3803 // There's a single possible klass at this profile point
3804 assert(exact_klass != NULL, "should be");
3805 if (TypeEntries::is_type_none(current_klass)) {
3806 __ mov_metadata(tmp, exact_klass->constant_encoding());
3807 __ xorptr(tmp, mdo_addr);
3808 __ testptr(tmp, TypeEntries::type_klass_mask);
3809 #ifdef ASSERT
3810 __ jcc(Assembler::zero, next);
3811
3812 {
3813 Label ok;
3814 __ push(tmp);
3815 __ cmpptr(mdo_addr, 0);
3816 __ jcc(Assembler::equal, ok);
3817 __ cmpptr(mdo_addr, TypeEntries::null_seen);
3818 __ jcc(Assembler::equal, ok);
3819 // may have been set by another thread
3820 __ mov_metadata(tmp, exact_klass->constant_encoding());
3821 __ xorptr(tmp, mdo_addr);
3822 __ testptr(tmp, TypeEntries::type_mask);
3823 __ jcc(Assembler::zero, ok);
3824
3825 __ stop("unexpected profiling mismatch");
3826 __ bind(ok);
3827 __ pop(tmp);
3828 }
3829 #else
3830 __ jccb(Assembler::zero, next);
3831 #endif
3832 // first time here. Set profile type.
3833 __ movptr(mdo_addr, tmp);
3834 } else {
3835 assert(ciTypeEntries::valid_ciklass(current_klass) != NULL &&
3836 ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "inconsistent");
3837
3838 __ movptr(tmp, mdo_addr);
3839 __ testptr(tmp, TypeEntries::type_unknown);
3840 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
3841
3842 __ orptr(mdo_addr, TypeEntries::type_unknown);
3843 }
3844 }
3845
3846 __ bind(next);
3847 }
3848 }
3849
3850 void LIR_Assembler::emit_delay(LIR_OpDelay*) {
3851 Unimplemented();
3852 }
3853
3854
3855 void LIR_Assembler::monitor_address(int monitor_no, LIR_Opr dst) {
3856 __ lea(dst->as_register(), frame_map()->address_for_monitor_lock(monitor_no));
3857 }
3858
3859
3860 void LIR_Assembler::align_backward_branch_target() {
3861 __ align(BytesPerWord);
3862 }
3863
3864
3865 void LIR_Assembler::negate(LIR_Opr left, LIR_Opr dest) {
3866 if (left->is_single_cpu()) {
3867 __ negl(left->as_register());
3868 move_regs(left->as_register(), dest->as_register());
3869
3870 } else if (left->is_double_cpu()) {
3871 Register lo = left->as_register_lo();
3872 #ifdef _LP64
3873 Register dst = dest->as_register_lo();
3874 __ movptr(dst, lo);
3875 __ negptr(dst);
3876 #else
3877 Register hi = left->as_register_hi();
3878 __ lneg(hi, lo);
3879 if (dest->as_register_lo() == hi) {
3880 assert(dest->as_register_hi() != lo, "destroying register");
3881 move_regs(hi, dest->as_register_hi());
3882 move_regs(lo, dest->as_register_lo());
3883 } else {
3884 move_regs(lo, dest->as_register_lo());
3885 move_regs(hi, dest->as_register_hi());
3886 }
3887 #endif // _LP64
3888
3889 } else if (dest->is_single_xmm()) {
3890 if (left->as_xmm_float_reg() != dest->as_xmm_float_reg()) {
3891 __ movflt(dest->as_xmm_float_reg(), left->as_xmm_float_reg());
3892 }
3893 __ xorps(dest->as_xmm_float_reg(),
3894 ExternalAddress((address)float_signflip_pool));
3895
3896 } else if (dest->is_double_xmm()) {
3897 if (left->as_xmm_double_reg() != dest->as_xmm_double_reg()) {
3898 __ movdbl(dest->as_xmm_double_reg(), left->as_xmm_double_reg());
3899 }
3900 __ xorpd(dest->as_xmm_double_reg(),
3901 ExternalAddress((address)double_signflip_pool));
3902
3903 } else if (left->is_single_fpu() || left->is_double_fpu()) {
3904 assert(left->fpu() == 0, "arg must be on TOS");
3905 assert(dest->fpu() == 0, "dest must be TOS");
3906 __ fchs();
3907
3908 } else {
3909 ShouldNotReachHere();
3910 }
3911 }
3912
3913
3914 void LIR_Assembler::leal(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) {
3915 assert(src->is_address(), "must be an address");
3916 assert(dest->is_register(), "must be a register");
3917
3918 if (!UseShenandoahGC) {
3919 Register reg = dest->as_pointer_register();
3920 __ lea(reg, as_Address(src->as_address_ptr()));
3921 } else {
3922 PatchingStub* patch = NULL;
3923 if (patch_code != lir_patch_none) {
3924 patch = new PatchingStub(_masm, PatchingStub::access_field_id);
3925 }
3926
3927 Register reg = dest->as_pointer_register();
3928 LIR_Address* addr = src->as_address_ptr();
3929 __ lea(reg, as_Address(addr));
3930
3931 if (patch != NULL) {
3932 patching_epilog(patch, patch_code, addr->base()->as_register(), info);
3933 }
3934 }
3935 }
3936
3937
3938
3939 void LIR_Assembler::rt_call(LIR_Opr result, address dest, const LIR_OprList* args, LIR_Opr tmp, CodeEmitInfo* info) {
3940 assert(!tmp->is_valid(), "don't need temporary");
3941 __ call(RuntimeAddress(dest));
3942 if (info != NULL) {
3943 add_call_info_here(info);
3944 }
3945 }
3946
3947
3948 void LIR_Assembler::volatile_move_op(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info) {
3949 assert(type == T_LONG, "only for volatile long fields");
3950
3951 if (info != NULL) {
3952 add_debug_info_for_null_check_here(info);
3953 }
3954
3955 if (src->is_double_xmm()) {
3956 if (dest->is_double_cpu()) {
3957 #ifdef _LP64
3958 __ movdq(dest->as_register_lo(), src->as_xmm_double_reg());
3959 #else
3960 __ movdl(dest->as_register_lo(), src->as_xmm_double_reg());
3961 __ psrlq(src->as_xmm_double_reg(), 32);
3962 __ movdl(dest->as_register_hi(), src->as_xmm_double_reg());
3963 #endif // _LP64
3964 } else if (dest->is_double_stack()) {
3965 __ movdbl(frame_map()->address_for_slot(dest->double_stack_ix()), src->as_xmm_double_reg());
3966 } else if (dest->is_address()) {
3967 __ movdbl(as_Address(dest->as_address_ptr()), src->as_xmm_double_reg());
3968 } else {
3969 ShouldNotReachHere();
3970 }
3971
3972 } else if (dest->is_double_xmm()) {
3973 if (src->is_double_stack()) {
3974 __ movdbl(dest->as_xmm_double_reg(), frame_map()->address_for_slot(src->double_stack_ix()));
3975 } else if (src->is_address()) {
3976 __ movdbl(dest->as_xmm_double_reg(), as_Address(src->as_address_ptr()));
3977 } else {
3978 ShouldNotReachHere();
3979 }
3980
3981 } else if (src->is_double_fpu()) {
3982 assert(src->fpu_regnrLo() == 0, "must be TOS");
3983 if (dest->is_double_stack()) {
3984 __ fistp_d(frame_map()->address_for_slot(dest->double_stack_ix()));
3985 } else if (dest->is_address()) {
3986 __ fistp_d(as_Address(dest->as_address_ptr()));
3987 } else {
3988 ShouldNotReachHere();
3989 }
3990
3991 } else if (dest->is_double_fpu()) {
3992 assert(dest->fpu_regnrLo() == 0, "must be TOS");
3993 if (src->is_double_stack()) {
3994 __ fild_d(frame_map()->address_for_slot(src->double_stack_ix()));
3995 } else if (src->is_address()) {
3996 __ fild_d(as_Address(src->as_address_ptr()));
3997 } else {
3998 ShouldNotReachHere();
3999 }
4000 } else {
4001 ShouldNotReachHere();
4002 }
4003 }
4004
4005 #ifdef ASSERT
4006 // emit run-time assertion
4007 void LIR_Assembler::emit_assert(LIR_OpAssert* op) {
4008 assert(op->code() == lir_assert, "must be");
4009
4010 if (op->in_opr1()->is_valid()) {
4011 assert(op->in_opr2()->is_valid(), "both operands must be valid");
4012 comp_op(op->condition(), op->in_opr1(), op->in_opr2(), op);
4013 } else {
4014 assert(op->in_opr2()->is_illegal(), "both operands must be illegal");
4015 assert(op->condition() == lir_cond_always, "no other conditions allowed");
4016 }
4017
4018 Label ok;
4019 if (op->condition() != lir_cond_always) {
4020 Assembler::Condition acond = Assembler::zero;
4021 switch (op->condition()) {
4022 case lir_cond_equal: acond = Assembler::equal; break;
4023 case lir_cond_notEqual: acond = Assembler::notEqual; break;
4024 case lir_cond_less: acond = Assembler::less; break;
4025 case lir_cond_lessEqual: acond = Assembler::lessEqual; break;
4026 case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break;
4027 case lir_cond_greater: acond = Assembler::greater; break;
4028 case lir_cond_belowEqual: acond = Assembler::belowEqual; break;
4029 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; break;
4030 default: ShouldNotReachHere();
4031 }
4032 __ jcc(acond, ok);
4033 }
4034 if (op->halt()) {
4035 const char* str = __ code_string(op->msg());
4036 __ stop(str);
4037 } else {
4038 breakpoint();
4039 }
4040 __ bind(ok);
4041 }
4042 #endif
4043
4044 void LIR_Assembler::membar() {
4045 // QQQ sparc TSO uses this,
4046 __ membar( Assembler::Membar_mask_bits(Assembler::StoreLoad));
4047 }
4048
4049 void LIR_Assembler::membar_acquire() {
4050 // No x86 machines currently require load fences
4051 // __ load_fence();
4052 }
4053
4054 void LIR_Assembler::membar_release() {
4055 // No x86 machines currently require store fences
4056 // __ store_fence();
4057 }
4058
4059 void LIR_Assembler::membar_loadload() {
4060 // no-op
4061 //__ membar(Assembler::Membar_mask_bits(Assembler::loadload));
4062 }
4063
4064 void LIR_Assembler::membar_storestore() {
4065 // no-op
4066 //__ membar(Assembler::Membar_mask_bits(Assembler::storestore));
4067 }
4068
4069 void LIR_Assembler::membar_loadstore() {
4070 // no-op
4071 //__ membar(Assembler::Membar_mask_bits(Assembler::loadstore));
4072 }
4073
4074 void LIR_Assembler::membar_storeload() {
4075 __ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad));
4076 }
4077
4078 void LIR_Assembler::get_thread(LIR_Opr result_reg) {
4079 assert(result_reg->is_register(), "check");
4080 #ifdef _LP64
4081 // __ get_thread(result_reg->as_register_lo());
4082 __ mov(result_reg->as_register(), r15_thread);
4083 #else
4084 __ get_thread(result_reg->as_register());
4085 #endif // _LP64
4086 }
4087
4088
4089 void LIR_Assembler::peephole(LIR_List*) {
4090 // do nothing for now
4091 }
4092
4093 void LIR_Assembler::atomic_op(LIR_Code code, LIR_Opr src, LIR_Opr data, LIR_Opr dest, LIR_Opr tmp) {
4094 assert(data == dest, "xchg/xadd uses only 2 operands");
4095
4096 if (data->type() == T_INT) {
4097 if (code == lir_xadd) {
4098 if (os::is_MP()) {
4099 __ lock();
4100 }
4101 __ xaddl(as_Address(src->as_address_ptr()), data->as_register());
4102 } else {
4103 __ xchgl(data->as_register(), as_Address(src->as_address_ptr()));
4104 }
4105 } else if (data->is_oop()) {
4106 assert (code == lir_xchg, "xadd for oops");
4107 Register obj = data->as_register();
4108 #ifdef _LP64
4109 if (UseCompressedOops) {
4110 __ encode_heap_oop(obj);
4111 __ xchgl(obj, as_Address(src->as_address_ptr()));
4112 __ decode_heap_oop(obj);
4113 } else {
4114 __ xchgptr(obj, as_Address(src->as_address_ptr()));
4115 }
4116 #else
4117 __ xchgl(obj, as_Address(src->as_address_ptr()));
4118 #endif
4119 } else if (data->type() == T_LONG) {
4120 #ifdef _LP64
4121 assert(data->as_register_lo() == data->as_register_hi(), "should be a single register");
4122 if (code == lir_xadd) {
4123 if (os::is_MP()) {
4124 __ lock();
4125 }
4126 __ xaddq(as_Address(src->as_address_ptr()), data->as_register_lo());
4127 } else {
4128 __ xchgq(data->as_register_lo(), as_Address(src->as_address_ptr()));
4129 }
4130 #else
4131 ShouldNotReachHere();
4132 #endif
4133 } else {
4134 ShouldNotReachHere();
4135 }
4136 }
4137
4138 #undef __