1 /*
2 * Copyright (c) 2005, 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 "c1/c1_Compilation.hpp"
27 #include "c1/c1_FrameMap.hpp"
28 #include "c1/c1_Instruction.hpp"
29 #include "c1/c1_LIRAssembler.hpp"
30 #include "c1/c1_LIRGenerator.hpp"
31 #include "c1/c1_Runtime1.hpp"
32 #include "c1/c1_ValueStack.hpp"
33 #include "ci/ciArray.hpp"
34 #include "ci/ciObjArrayKlass.hpp"
35 #include "ci/ciTypeArrayKlass.hpp"
36 #include "runtime/sharedRuntime.hpp"
37 #include "runtime/stubRoutines.hpp"
38 #include "vmreg_x86.inline.hpp"
39
40 #ifdef ASSERT
41 #define __ gen()->lir(__FILE__, __LINE__)->
42 #else
43 #define __ gen()->lir()->
44 #endif
45
46 // Item will be loaded into a byte register; Intel only
47 void LIRItem::load_byte_item() {
48 load_item();
49 LIR_Opr res = result();
50
51 if (!res->is_virtual() || !_gen->is_vreg_flag_set(res, LIRGenerator::byte_reg)) {
52 // make sure that it is a byte register
53 assert(!value()->type()->is_float() && !value()->type()->is_double(),
54 "can't load floats in byte register");
55 LIR_Opr reg = _gen->rlock_byte(T_BYTE);
56 __ move(res, reg);
57
58 _result = reg;
59 }
60 }
61
62
63 void LIRItem::load_nonconstant() {
64 LIR_Opr r = value()->operand();
65 if (r->is_constant()) {
66 _result = r;
67 } else {
68 load_item();
69 }
70 }
71
72 //--------------------------------------------------------------
73 // LIRGenerator
74 //--------------------------------------------------------------
75
76
77 LIR_Opr LIRGenerator::exceptionOopOpr() { return FrameMap::rax_oop_opr; }
78 LIR_Opr LIRGenerator::exceptionPcOpr() { return FrameMap::rdx_opr; }
79 LIR_Opr LIRGenerator::divInOpr() { return FrameMap::rax_opr; }
80 LIR_Opr LIRGenerator::divOutOpr() { return FrameMap::rax_opr; }
81 LIR_Opr LIRGenerator::remOutOpr() { return FrameMap::rdx_opr; }
82 LIR_Opr LIRGenerator::shiftCountOpr() { return FrameMap::rcx_opr; }
83 LIR_Opr LIRGenerator::syncTempOpr() { return FrameMap::rax_opr; }
84 LIR_Opr LIRGenerator::getThreadTemp() { return LIR_OprFact::illegalOpr; }
85
86
87 LIR_Opr LIRGenerator::result_register_for(ValueType* type, bool callee) {
88 LIR_Opr opr;
89 switch (type->tag()) {
90 case intTag: opr = FrameMap::rax_opr; break;
91 case objectTag: opr = FrameMap::rax_oop_opr; break;
92 case longTag: opr = FrameMap::long0_opr; break;
93 case floatTag: opr = UseSSE >= 1 ? FrameMap::xmm0_float_opr : FrameMap::fpu0_float_opr; break;
94 case doubleTag: opr = UseSSE >= 2 ? FrameMap::xmm0_double_opr : FrameMap::fpu0_double_opr; break;
95
96 case addressTag:
97 default: ShouldNotReachHere(); return LIR_OprFact::illegalOpr;
98 }
99
100 assert(opr->type_field() == as_OprType(as_BasicType(type)), "type mismatch");
101 return opr;
102 }
103
104
105 LIR_Opr LIRGenerator::rlock_byte(BasicType type) {
106 LIR_Opr reg = new_register(T_INT);
107 set_vreg_flag(reg, LIRGenerator::byte_reg);
108 return reg;
109 }
110
111
112 //--------- loading items into registers --------------------------------
113
114
115 // i486 instructions can inline constants
116 bool LIRGenerator::can_store_as_constant(Value v, BasicType type) const {
117 if (type == T_SHORT || type == T_CHAR) {
118 // there is no immediate move of word values in asembler_i486.?pp
119 return false;
120 }
121 Constant* c = v->as_Constant();
122 if (c && c->state_before() == NULL) {
123 // constants of any type can be stored directly, except for
124 // unloaded object constants.
125 return true;
126 }
127 return false;
128 }
129
130
131 bool LIRGenerator::can_inline_as_constant(Value v) const {
132 if (v->type()->tag() == longTag) return false;
133 return v->type()->tag() != objectTag ||
134 (v->type()->is_constant() && v->type()->as_ObjectType()->constant_value()->is_null_object());
135 }
136
137
138 bool LIRGenerator::can_inline_as_constant(LIR_Const* c) const {
139 if (c->type() == T_LONG) return false;
140 return c->type() != T_OBJECT || c->as_jobject() == NULL;
141 }
142
143
144 LIR_Opr LIRGenerator::safepoint_poll_register() {
145 return LIR_OprFact::illegalOpr;
146 }
147
148
149 LIR_Address* LIRGenerator::generate_address(LIR_Opr base, LIR_Opr index,
150 int shift, int disp, BasicType type) {
151 assert(base->is_register(), "must be");
152 if (index->is_constant()) {
153 return new LIR_Address(base,
154 (index->as_constant_ptr()->as_jint() << shift) + disp,
155 type);
156 } else {
157 return new LIR_Address(base, index, (LIR_Address::Scale)shift, disp, type);
158 }
159 }
160
161
162 LIR_Address* LIRGenerator::emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr,
163 BasicType type, bool needs_card_mark) {
164 int offset_in_bytes = arrayOopDesc::base_offset_in_bytes(type);
165
166 LIR_Address* addr;
167 if (index_opr->is_constant()) {
168 int elem_size = type2aelembytes(type);
169 addr = new LIR_Address(array_opr,
170 offset_in_bytes + index_opr->as_jint() * elem_size, type);
171 } else {
172 #ifdef _LP64
173 if (index_opr->type() == T_INT) {
174 LIR_Opr tmp = new_register(T_LONG);
175 __ convert(Bytecodes::_i2l, index_opr, tmp);
176 index_opr = tmp;
177 }
178 #endif // _LP64
179 addr = new LIR_Address(array_opr,
180 index_opr,
181 LIR_Address::scale(type),
182 offset_in_bytes, type);
183 }
184 if (needs_card_mark) {
185 // This store will need a precise card mark, so go ahead and
186 // compute the full adddres instead of computing once for the
187 // store and again for the card mark.
188 LIR_Opr tmp = new_pointer_register();
189 __ leal(LIR_OprFact::address(addr), tmp);
190 return new LIR_Address(tmp, type);
191 } else {
192 return addr;
193 }
194 }
195
196
197 LIR_Opr LIRGenerator::load_immediate(int x, BasicType type) {
198 LIR_Opr r;
199 if (type == T_LONG) {
200 r = LIR_OprFact::longConst(x);
201 } else if (type == T_INT) {
202 r = LIR_OprFact::intConst(x);
203 } else {
204 ShouldNotReachHere();
205 }
206 return r;
207 }
208
209 void LIRGenerator::increment_counter(address counter, BasicType type, int step) {
210 LIR_Opr pointer = new_pointer_register();
211 __ move(LIR_OprFact::intptrConst(counter), pointer);
212 LIR_Address* addr = new LIR_Address(pointer, type);
213 increment_counter(addr, step);
214 }
215
216
217 void LIRGenerator::increment_counter(LIR_Address* addr, int step) {
218 __ add((LIR_Opr)addr, LIR_OprFact::intConst(step), (LIR_Opr)addr);
219 }
220
221 void LIRGenerator::cmp_mem_int(LIR_Condition condition, LIR_Opr base, int disp, int c, CodeEmitInfo* info) {
222 __ cmp_mem_int(condition, base, disp, c, info);
223 }
224
225
226 void LIRGenerator::cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, int disp, BasicType type, CodeEmitInfo* info) {
227 __ cmp_reg_mem(condition, reg, new LIR_Address(base, disp, type), info);
228 }
229
230
231 void LIRGenerator::cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, LIR_Opr disp, BasicType type, CodeEmitInfo* info) {
232 __ cmp_reg_mem(condition, reg, new LIR_Address(base, disp, type), info);
233 }
234
235
236 bool LIRGenerator::strength_reduce_multiply(LIR_Opr left, int c, LIR_Opr result, LIR_Opr tmp) {
237 if (tmp->is_valid()) {
238 if (is_power_of_2(c + 1)) {
239 __ move(left, tmp);
240 __ shift_left(left, log2_intptr(c + 1), left);
241 __ sub(left, tmp, result);
242 return true;
243 } else if (is_power_of_2(c - 1)) {
244 __ move(left, tmp);
245 __ shift_left(left, log2_intptr(c - 1), left);
246 __ add(left, tmp, result);
247 return true;
248 }
249 }
250 return false;
251 }
252
253
254 void LIRGenerator::store_stack_parameter (LIR_Opr item, ByteSize offset_from_sp) {
255 BasicType type = item->type();
256 __ store(item, new LIR_Address(FrameMap::rsp_opr, in_bytes(offset_from_sp), type));
257 }
258
259 //----------------------------------------------------------------------
260 // visitor functions
261 //----------------------------------------------------------------------
262
263
264 void LIRGenerator::do_StoreIndexed(StoreIndexed* x) {
265 assert(x->is_pinned(),"");
266 bool needs_range_check = x->compute_needs_range_check();
267 bool use_length = x->length() != NULL;
268 bool obj_store = x->elt_type() == T_ARRAY || x->elt_type() == T_OBJECT;
269 bool needs_store_check = obj_store && (x->value()->as_Constant() == NULL ||
270 !get_jobject_constant(x->value())->is_null_object() ||
271 x->should_profile());
272
273 LIRItem array(x->array(), this);
274 LIRItem index(x->index(), this);
275 LIRItem value(x->value(), this);
276 LIRItem length(this);
277
278 array.load_item();
279 index.load_nonconstant();
280
281 if (use_length && needs_range_check) {
282 length.set_instruction(x->length());
283 length.load_item();
284
285 }
286 if (needs_store_check) {
287 value.load_item();
288 } else {
289 value.load_for_store(x->elt_type());
290 }
291
292 set_no_result(x);
293
294 // the CodeEmitInfo must be duplicated for each different
295 // LIR-instruction because spilling can occur anywhere between two
296 // instructions and so the debug information must be different
297 CodeEmitInfo* range_check_info = state_for(x);
298 CodeEmitInfo* null_check_info = NULL;
299 if (x->needs_null_check()) {
300 null_check_info = new CodeEmitInfo(range_check_info);
301 }
302
303 // emit array address setup early so it schedules better
304 LIR_Address* array_addr = emit_array_address(array.result(), index.result(), x->elt_type(), obj_store);
305
306 if (GenerateRangeChecks && needs_range_check) {
307 if (use_length) {
308 __ cmp(lir_cond_belowEqual, length.result(), index.result());
309 __ branch(lir_cond_belowEqual, T_INT, new RangeCheckStub(range_check_info, index.result()));
310 } else {
311 array_range_check(array.result(), index.result(), null_check_info, range_check_info);
312 // range_check also does the null check
313 null_check_info = NULL;
314 }
315 }
316
317 if (GenerateArrayStoreCheck && needs_store_check) {
318 LIR_Opr tmp1 = new_register(objectType);
319 LIR_Opr tmp2 = new_register(objectType);
320 LIR_Opr tmp3 = new_register(objectType);
321
322 CodeEmitInfo* store_check_info = new CodeEmitInfo(range_check_info);
323 __ store_check(value.result(), array.result(), tmp1, tmp2, tmp3, store_check_info, x->profiled_method(), x->profiled_bci());
324 }
325
326 if (obj_store) {
327 // Needs GC write barriers.
328 pre_barrier(LIR_OprFact::address(array_addr), LIR_OprFact::illegalOpr /* pre_val */,
329 true /* do_load */, false /* patch */, NULL);
330 __ move(value.result(), array_addr, null_check_info);
331 // Seems to be a precise
332 post_barrier(LIR_OprFact::address(array_addr), value.result());
333 } else {
334 __ move(value.result(), array_addr, null_check_info);
335 }
336 }
337
338
339 void LIRGenerator::do_MonitorEnter(MonitorEnter* x) {
340 assert(x->is_pinned(),"");
341 LIRItem obj(x->obj(), this);
342 obj.load_item();
343
344 set_no_result(x);
345
346 // "lock" stores the address of the monitor stack slot, so this is not an oop
347 LIR_Opr lock = new_register(T_INT);
348 // Need a scratch register for biased locking on x86
349 LIR_Opr scratch = LIR_OprFact::illegalOpr;
350 if (UseBiasedLocking) {
351 scratch = new_register(T_INT);
352 }
353
354 CodeEmitInfo* info_for_exception = NULL;
355 if (x->needs_null_check()) {
356 info_for_exception = state_for(x);
357 }
358 // this CodeEmitInfo must not have the xhandlers because here the
359 // object is already locked (xhandlers expect object to be unlocked)
360 CodeEmitInfo* info = state_for(x, x->state(), true);
361 monitor_enter(obj.result(), lock, syncTempOpr(), scratch,
362 x->monitor_no(), info_for_exception, info);
363 }
364
365
366 void LIRGenerator::do_MonitorExit(MonitorExit* x) {
367 assert(x->is_pinned(),"");
368
369 LIRItem obj(x->obj(), this);
370 obj.dont_load_item();
371
372 LIR_Opr lock = new_register(T_INT);
373 LIR_Opr obj_temp = new_register(T_INT);
374 set_no_result(x);
375 monitor_exit(obj_temp, lock, syncTempOpr(), LIR_OprFact::illegalOpr, x->monitor_no());
376 }
377
378
379 // _ineg, _lneg, _fneg, _dneg
380 void LIRGenerator::do_NegateOp(NegateOp* x) {
381 LIRItem value(x->x(), this);
382 value.set_destroys_register();
383 value.load_item();
384 LIR_Opr reg = rlock(x);
385 __ negate(value.result(), reg);
386
387 set_result(x, round_item(reg));
388 }
389
390
391 // for _fadd, _fmul, _fsub, _fdiv, _frem
392 // _dadd, _dmul, _dsub, _ddiv, _drem
393 void LIRGenerator::do_ArithmeticOp_FPU(ArithmeticOp* x) {
394 LIRItem left(x->x(), this);
395 LIRItem right(x->y(), this);
396 LIRItem* left_arg = &left;
397 LIRItem* right_arg = &right;
398 assert(!left.is_stack() || !right.is_stack(), "can't both be memory operands");
399 bool must_load_both = (x->op() == Bytecodes::_frem || x->op() == Bytecodes::_drem);
400 if (left.is_register() || x->x()->type()->is_constant() || must_load_both) {
401 left.load_item();
402 } else {
403 left.dont_load_item();
404 }
405
406 // do not load right operand if it is a constant. only 0 and 1 are
407 // loaded because there are special instructions for loading them
408 // without memory access (not needed for SSE2 instructions)
409 bool must_load_right = false;
410 if (right.is_constant()) {
411 LIR_Const* c = right.result()->as_constant_ptr();
412 assert(c != NULL, "invalid constant");
413 assert(c->type() == T_FLOAT || c->type() == T_DOUBLE, "invalid type");
414
415 if (c->type() == T_FLOAT) {
416 must_load_right = UseSSE < 1 && (c->is_one_float() || c->is_zero_float());
417 } else {
418 must_load_right = UseSSE < 2 && (c->is_one_double() || c->is_zero_double());
419 }
420 }
421
422 if (must_load_both) {
423 // frem and drem destroy also right operand, so move it to a new register
424 right.set_destroys_register();
425 right.load_item();
426 } else if (right.is_register() || must_load_right) {
427 right.load_item();
428 } else {
429 right.dont_load_item();
430 }
431 LIR_Opr reg = rlock(x);
432 LIR_Opr tmp = LIR_OprFact::illegalOpr;
433 if (x->is_strictfp() && (x->op() == Bytecodes::_dmul || x->op() == Bytecodes::_ddiv)) {
434 tmp = new_register(T_DOUBLE);
435 }
436
437 if ((UseSSE >= 1 && x->op() == Bytecodes::_frem) || (UseSSE >= 2 && x->op() == Bytecodes::_drem)) {
438 // special handling for frem and drem: no SSE instruction, so must use FPU with temporary fpu stack slots
439 LIR_Opr fpu0, fpu1;
440 if (x->op() == Bytecodes::_frem) {
441 fpu0 = LIR_OprFact::single_fpu(0);
442 fpu1 = LIR_OprFact::single_fpu(1);
443 } else {
444 fpu0 = LIR_OprFact::double_fpu(0);
445 fpu1 = LIR_OprFact::double_fpu(1);
446 }
447 __ move(right.result(), fpu1); // order of left and right operand is important!
448 __ move(left.result(), fpu0);
449 __ rem (fpu0, fpu1, fpu0);
450 __ move(fpu0, reg);
451
452 } else {
453 arithmetic_op_fpu(x->op(), reg, left.result(), right.result(), x->is_strictfp(), tmp);
454 }
455
456 set_result(x, round_item(reg));
457 }
458
459
460 // for _ladd, _lmul, _lsub, _ldiv, _lrem
461 void LIRGenerator::do_ArithmeticOp_Long(ArithmeticOp* x) {
462 if (x->op() == Bytecodes::_ldiv || x->op() == Bytecodes::_lrem ) {
463 // long division is implemented as a direct call into the runtime
464 LIRItem left(x->x(), this);
465 LIRItem right(x->y(), this);
466
467 // the check for division by zero destroys the right operand
468 right.set_destroys_register();
469
470 BasicTypeList signature(2);
471 signature.append(T_LONG);
472 signature.append(T_LONG);
473 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
474
475 // check for division by zero (destroys registers of right operand!)
476 CodeEmitInfo* info = state_for(x);
477
478 const LIR_Opr result_reg = result_register_for(x->type());
479 left.load_item_force(cc->at(1));
480 right.load_item();
481
482 __ move(right.result(), cc->at(0));
483
484 __ cmp(lir_cond_equal, right.result(), LIR_OprFact::longConst(0));
485 __ branch(lir_cond_equal, T_LONG, new DivByZeroStub(info));
486
487 address entry;
488 switch (x->op()) {
489 case Bytecodes::_lrem:
490 entry = CAST_FROM_FN_PTR(address, SharedRuntime::lrem);
491 break; // check if dividend is 0 is done elsewhere
492 case Bytecodes::_ldiv:
493 entry = CAST_FROM_FN_PTR(address, SharedRuntime::ldiv);
494 break; // check if dividend is 0 is done elsewhere
495 case Bytecodes::_lmul:
496 entry = CAST_FROM_FN_PTR(address, SharedRuntime::lmul);
497 break;
498 default:
499 ShouldNotReachHere();
500 }
501
502 LIR_Opr result = rlock_result(x);
503 __ call_runtime_leaf(entry, getThreadTemp(), result_reg, cc->args());
504 __ move(result_reg, result);
505 } else if (x->op() == Bytecodes::_lmul) {
506 // missing test if instr is commutative and if we should swap
507 LIRItem left(x->x(), this);
508 LIRItem right(x->y(), this);
509
510 // right register is destroyed by the long mul, so it must be
511 // copied to a new register.
512 right.set_destroys_register();
513
514 left.load_item();
515 right.load_item();
516
517 LIR_Opr reg = FrameMap::long0_opr;
518 arithmetic_op_long(x->op(), reg, left.result(), right.result(), NULL);
519 LIR_Opr result = rlock_result(x);
520 __ move(reg, result);
521 } else {
522 // missing test if instr is commutative and if we should swap
523 LIRItem left(x->x(), this);
524 LIRItem right(x->y(), this);
525
526 left.load_item();
527 // don't load constants to save register
528 right.load_nonconstant();
529 rlock_result(x);
530 arithmetic_op_long(x->op(), x->operand(), left.result(), right.result(), NULL);
531 }
532 }
533
534
535
536 // for: _iadd, _imul, _isub, _idiv, _irem
537 void LIRGenerator::do_ArithmeticOp_Int(ArithmeticOp* x) {
538 if (x->op() == Bytecodes::_idiv || x->op() == Bytecodes::_irem) {
539 // The requirements for division and modulo
540 // input : rax,: dividend min_int
541 // reg: divisor (may not be rax,/rdx) -1
542 //
543 // output: rax,: quotient (= rax, idiv reg) min_int
544 // rdx: remainder (= rax, irem reg) 0
545
546 // rax, and rdx will be destroyed
547
548 // Note: does this invalidate the spec ???
549 LIRItem right(x->y(), this);
550 LIRItem left(x->x() , this); // visit left second, so that the is_register test is valid
551
552 // call state_for before load_item_force because state_for may
553 // force the evaluation of other instructions that are needed for
554 // correct debug info. Otherwise the live range of the fix
555 // register might be too long.
556 CodeEmitInfo* info = state_for(x);
557
558 left.load_item_force(divInOpr());
559
560 right.load_item();
561
562 LIR_Opr result = rlock_result(x);
563 LIR_Opr result_reg;
564 if (x->op() == Bytecodes::_idiv) {
565 result_reg = divOutOpr();
566 } else {
567 result_reg = remOutOpr();
568 }
569
570 if (!ImplicitDiv0Checks) {
571 __ cmp(lir_cond_equal, right.result(), LIR_OprFact::intConst(0));
572 __ branch(lir_cond_equal, T_INT, new DivByZeroStub(info));
573 }
574 LIR_Opr tmp = FrameMap::rdx_opr; // idiv and irem use rdx in their implementation
575 if (x->op() == Bytecodes::_irem) {
576 __ irem(left.result(), right.result(), result_reg, tmp, info);
577 } else if (x->op() == Bytecodes::_idiv) {
578 __ idiv(left.result(), right.result(), result_reg, tmp, info);
579 } else {
580 ShouldNotReachHere();
581 }
582
583 __ move(result_reg, result);
584 } else {
585 // missing test if instr is commutative and if we should swap
586 LIRItem left(x->x(), this);
587 LIRItem right(x->y(), this);
588 LIRItem* left_arg = &left;
589 LIRItem* right_arg = &right;
590 if (x->is_commutative() && left.is_stack() && right.is_register()) {
591 // swap them if left is real stack (or cached) and right is real register(not cached)
592 left_arg = &right;
593 right_arg = &left;
594 }
595
596 left_arg->load_item();
597
598 // do not need to load right, as we can handle stack and constants
599 if (x->op() == Bytecodes::_imul ) {
600 // check if we can use shift instead
601 bool use_constant = false;
602 bool use_tmp = false;
603 if (right_arg->is_constant()) {
604 int iconst = right_arg->get_jint_constant();
605 if (iconst > 0) {
606 if (is_power_of_2(iconst)) {
607 use_constant = true;
608 } else if (is_power_of_2(iconst - 1) || is_power_of_2(iconst + 1)) {
609 use_constant = true;
610 use_tmp = true;
611 }
612 }
613 }
614 if (use_constant) {
615 right_arg->dont_load_item();
616 } else {
617 right_arg->load_item();
618 }
619 LIR_Opr tmp = LIR_OprFact::illegalOpr;
620 if (use_tmp) {
621 tmp = new_register(T_INT);
622 }
623 rlock_result(x);
624
625 arithmetic_op_int(x->op(), x->operand(), left_arg->result(), right_arg->result(), tmp);
626 } else {
627 right_arg->dont_load_item();
628 rlock_result(x);
629 LIR_Opr tmp = LIR_OprFact::illegalOpr;
630 arithmetic_op_int(x->op(), x->operand(), left_arg->result(), right_arg->result(), tmp);
631 }
632 }
633 }
634
635
636 void LIRGenerator::do_ArithmeticOp(ArithmeticOp* x) {
637 // when an operand with use count 1 is the left operand, then it is
638 // likely that no move for 2-operand-LIR-form is necessary
639 if (x->is_commutative() && x->y()->as_Constant() == NULL && x->x()->use_count() > x->y()->use_count()) {
640 x->swap_operands();
641 }
642
643 ValueTag tag = x->type()->tag();
644 assert(x->x()->type()->tag() == tag && x->y()->type()->tag() == tag, "wrong parameters");
645 switch (tag) {
646 case floatTag:
647 case doubleTag: do_ArithmeticOp_FPU(x); return;
648 case longTag: do_ArithmeticOp_Long(x); return;
649 case intTag: do_ArithmeticOp_Int(x); return;
650 }
651 ShouldNotReachHere();
652 }
653
654
655 // _ishl, _lshl, _ishr, _lshr, _iushr, _lushr
656 void LIRGenerator::do_ShiftOp(ShiftOp* x) {
657 // count must always be in rcx
658 LIRItem value(x->x(), this);
659 LIRItem count(x->y(), this);
660
661 ValueTag elemType = x->type()->tag();
662 bool must_load_count = !count.is_constant() || elemType == longTag;
663 if (must_load_count) {
664 // count for long must be in register
665 count.load_item_force(shiftCountOpr());
666 } else {
667 count.dont_load_item();
668 }
669 value.load_item();
670 LIR_Opr reg = rlock_result(x);
671
672 shift_op(x->op(), reg, value.result(), count.result(), LIR_OprFact::illegalOpr);
673 }
674
675
676 // _iand, _land, _ior, _lor, _ixor, _lxor
677 void LIRGenerator::do_LogicOp(LogicOp* x) {
678 // when an operand with use count 1 is the left operand, then it is
679 // likely that no move for 2-operand-LIR-form is necessary
680 if (x->is_commutative() && x->y()->as_Constant() == NULL && x->x()->use_count() > x->y()->use_count()) {
681 x->swap_operands();
682 }
683
684 LIRItem left(x->x(), this);
685 LIRItem right(x->y(), this);
686
687 left.load_item();
688 right.load_nonconstant();
689 LIR_Opr reg = rlock_result(x);
690
691 logic_op(x->op(), reg, left.result(), right.result());
692 }
693
694
695
696 // _lcmp, _fcmpl, _fcmpg, _dcmpl, _dcmpg
697 void LIRGenerator::do_CompareOp(CompareOp* x) {
698 LIRItem left(x->x(), this);
699 LIRItem right(x->y(), this);
700 ValueTag tag = x->x()->type()->tag();
701 if (tag == longTag) {
702 left.set_destroys_register();
703 }
704 left.load_item();
705 right.load_item();
706 LIR_Opr reg = rlock_result(x);
707
708 if (x->x()->type()->is_float_kind()) {
709 Bytecodes::Code code = x->op();
710 __ fcmp2int(left.result(), right.result(), reg, (code == Bytecodes::_fcmpl || code == Bytecodes::_dcmpl));
711 } else if (x->x()->type()->tag() == longTag) {
712 __ lcmp2int(left.result(), right.result(), reg);
713 } else {
714 Unimplemented();
715 }
716 }
717
718
719 void LIRGenerator::do_CompareAndSwap(Intrinsic* x, ValueType* type) {
720 assert(x->number_of_arguments() == 4, "wrong type");
721 LIRItem obj (x->argument_at(0), this); // object
722 LIRItem offset(x->argument_at(1), this); // offset of field
723 LIRItem cmp (x->argument_at(2), this); // value to compare with field
724 LIRItem val (x->argument_at(3), this); // replace field with val if matches cmp
725
726 assert(obj.type()->tag() == objectTag, "invalid type");
727
728 // In 64bit the type can be long, sparc doesn't have this assert
729 // assert(offset.type()->tag() == intTag, "invalid type");
730
731 assert(cmp.type()->tag() == type->tag(), "invalid type");
732 assert(val.type()->tag() == type->tag(), "invalid type");
733
734 // get address of field
735 obj.load_item();
736 offset.load_nonconstant();
737
738 if (type == objectType) {
739 cmp.load_item_force(FrameMap::rax_oop_opr);
740 val.load_item();
741 } else if (type == intType) {
742 cmp.load_item_force(FrameMap::rax_opr);
743 val.load_item();
744 } else if (type == longType) {
745 cmp.load_item_force(FrameMap::long0_opr);
746 val.load_item_force(FrameMap::long1_opr);
747 } else {
748 ShouldNotReachHere();
749 }
750
751 LIR_Opr addr = new_pointer_register();
752 LIR_Address* a;
753 if(offset.result()->is_constant()) {
754 #ifdef _LP64
755 jlong c = offset.result()->as_jlong();
756 if ((jlong)((jint)c) == c) {
757 a = new LIR_Address(obj.result(),
758 (jint)c,
759 as_BasicType(type));
760 } else {
761 LIR_Opr tmp = new_register(T_LONG);
762 __ move(offset.result(), tmp);
763 a = new LIR_Address(obj.result(),
764 tmp,
765 as_BasicType(type));
766 }
767 #else
768 a = new LIR_Address(obj.result(),
769 offset.result()->as_jint(),
770 as_BasicType(type));
771 #endif
772 } else {
773 a = new LIR_Address(obj.result(),
774 offset.result(),
775 LIR_Address::times_1,
776 0,
777 as_BasicType(type));
778 }
779 __ leal(LIR_OprFact::address(a), addr);
780
781 if (type == objectType) { // Write-barrier needed for Object fields.
782 // Do the pre-write barrier, if any.
783 pre_barrier(addr, LIR_OprFact::illegalOpr /* pre_val */,
784 true /* do_load */, false /* patch */, NULL);
785 }
786
787 LIR_Opr ill = LIR_OprFact::illegalOpr; // for convenience
788 if (type == objectType)
789 __ cas_obj(addr, cmp.result(), val.result(), ill, ill);
790 else if (type == intType)
791 __ cas_int(addr, cmp.result(), val.result(), ill, ill);
792 else if (type == longType)
793 __ cas_long(addr, cmp.result(), val.result(), ill, ill);
794 else {
795 ShouldNotReachHere();
796 }
797
798 // generate conditional move of boolean result
799 LIR_Opr result = rlock_result(x);
800 __ cmove(lir_cond_equal, LIR_OprFact::intConst(1), LIR_OprFact::intConst(0),
801 result, as_BasicType(type));
802 if (type == objectType) { // Write-barrier needed for Object fields.
803 // Seems to be precise
804 post_barrier(addr, val.result());
805 }
806 }
807
808
809 void LIRGenerator::do_MathIntrinsic(Intrinsic* x) {
810 assert(x->number_of_arguments() == 1 || (x->number_of_arguments() == 2 && x->id() == vmIntrinsics::_dpow), "wrong type");
811
812 if (x->id() == vmIntrinsics::_dexp) {
813 do_ExpIntrinsic(x);
814 return;
815 }
816
817 LIRItem value(x->argument_at(0), this);
818
819 bool use_fpu = false;
820 if (UseSSE >= 2) {
821 switch(x->id()) {
822 case vmIntrinsics::_dsin:
823 case vmIntrinsics::_dcos:
824 case vmIntrinsics::_dtan:
825 case vmIntrinsics::_dlog:
826 case vmIntrinsics::_dlog10:
827 case vmIntrinsics::_dpow:
828 use_fpu = true;
829 }
830 } else {
831 value.set_destroys_register();
832 }
833
834 value.load_item();
835
836 LIR_Opr calc_input = value.result();
837 LIR_Opr calc_input2 = NULL;
838 if (x->id() == vmIntrinsics::_dpow) {
839 LIRItem extra_arg(x->argument_at(1), this);
840 if (UseSSE < 2) {
841 extra_arg.set_destroys_register();
842 }
843 extra_arg.load_item();
844 calc_input2 = extra_arg.result();
845 }
846 LIR_Opr calc_result = rlock_result(x);
847
848 // sin, cos, pow and exp need two free fpu stack slots, so register
849 // two temporary operands
850 LIR_Opr tmp1 = FrameMap::caller_save_fpu_reg_at(0);
851 LIR_Opr tmp2 = FrameMap::caller_save_fpu_reg_at(1);
852
853 if (use_fpu) {
854 LIR_Opr tmp = FrameMap::fpu0_double_opr;
855 int tmp_start = 1;
856 if (calc_input2 != NULL) {
857 __ move(calc_input2, tmp);
858 tmp_start = 2;
859 calc_input2 = tmp;
860 }
861 __ move(calc_input, tmp);
862
863 calc_input = tmp;
864 calc_result = tmp;
865
866 tmp1 = FrameMap::caller_save_fpu_reg_at(tmp_start);
867 tmp2 = FrameMap::caller_save_fpu_reg_at(tmp_start + 1);
868 }
869
870 switch(x->id()) {
871 case vmIntrinsics::_dabs: __ abs (calc_input, calc_result, LIR_OprFact::illegalOpr); break;
872 case vmIntrinsics::_dsqrt: __ sqrt (calc_input, calc_result, LIR_OprFact::illegalOpr); break;
873 case vmIntrinsics::_dsin: __ sin (calc_input, calc_result, tmp1, tmp2); break;
874 case vmIntrinsics::_dcos: __ cos (calc_input, calc_result, tmp1, tmp2); break;
875 case vmIntrinsics::_dtan: __ tan (calc_input, calc_result, tmp1, tmp2); break;
876 case vmIntrinsics::_dlog: __ log (calc_input, calc_result, tmp1); break;
877 case vmIntrinsics::_dlog10: __ log10(calc_input, calc_result, tmp1); break;
878 case vmIntrinsics::_dpow: __ pow (calc_input, calc_input2, calc_result, tmp1, tmp2, FrameMap::rax_opr, FrameMap::rcx_opr, FrameMap::rdx_opr); break;
879 default: ShouldNotReachHere();
880 }
881
882 if (use_fpu) {
883 __ move(calc_result, x->operand());
884 }
885 }
886
887 void LIRGenerator::do_ExpIntrinsic(Intrinsic* x) {
888 LIRItem value(x->argument_at(0), this);
889 value.set_destroys_register();
890
891 LIR_Opr calc_result = rlock_result(x);
892 LIR_Opr result_reg = result_register_for(x->type());
893
894 BasicTypeList signature(1);
895 signature.append(T_DOUBLE);
896 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
897
898 value.load_item_force(cc->at(0));
899
900 #ifndef _LP64
901 LIR_Opr tmp = FrameMap::fpu0_double_opr;
902 result_reg = tmp;
903 if (VM_Version::supports_sse2()) {
904 __ call_runtime_leaf(StubRoutines::dexp(), getThreadTemp(), result_reg, cc->args());
905 } else {
906 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dexp), getThreadTemp(), result_reg, cc->args());
907 }
908 #else
909 __ call_runtime_leaf(StubRoutines::dexp(), getThreadTemp(), result_reg, cc->args());
910 #endif
911 __ move(result_reg, calc_result);
912 }
913
914 void LIRGenerator::do_ArrayCopy(Intrinsic* x) {
915 assert(x->number_of_arguments() == 5, "wrong type");
916
917 // Make all state_for calls early since they can emit code
918 CodeEmitInfo* info = state_for(x, x->state());
919
920 LIRItem src(x->argument_at(0), this);
921 LIRItem src_pos(x->argument_at(1), this);
922 LIRItem dst(x->argument_at(2), this);
923 LIRItem dst_pos(x->argument_at(3), this);
924 LIRItem length(x->argument_at(4), this);
925
926 // operands for arraycopy must use fixed registers, otherwise
927 // LinearScan will fail allocation (because arraycopy always needs a
928 // call)
929
930 #ifndef _LP64
931 src.load_item_force (FrameMap::rcx_oop_opr);
932 src_pos.load_item_force (FrameMap::rdx_opr);
933 dst.load_item_force (FrameMap::rax_oop_opr);
934 dst_pos.load_item_force (FrameMap::rbx_opr);
935 length.load_item_force (FrameMap::rdi_opr);
936 LIR_Opr tmp = (FrameMap::rsi_opr);
937 #else
938
939 // The java calling convention will give us enough registers
940 // so that on the stub side the args will be perfect already.
941 // On the other slow/special case side we call C and the arg
942 // positions are not similar enough to pick one as the best.
943 // Also because the java calling convention is a "shifted" version
944 // of the C convention we can process the java args trivially into C
945 // args without worry of overwriting during the xfer
946
947 src.load_item_force (FrameMap::as_oop_opr(j_rarg0));
948 src_pos.load_item_force (FrameMap::as_opr(j_rarg1));
949 dst.load_item_force (FrameMap::as_oop_opr(j_rarg2));
950 dst_pos.load_item_force (FrameMap::as_opr(j_rarg3));
951 length.load_item_force (FrameMap::as_opr(j_rarg4));
952
953 LIR_Opr tmp = FrameMap::as_opr(j_rarg5);
954 #endif // LP64
955
956 set_no_result(x);
957
958 int flags;
959 ciArrayKlass* expected_type;
960 arraycopy_helper(x, &flags, &expected_type);
961
962 __ arraycopy(src.result(), src_pos.result(), dst.result(), dst_pos.result(), length.result(), tmp, expected_type, flags, info); // does add_safepoint
963 }
964
965 void LIRGenerator::do_update_CRC32(Intrinsic* x) {
966 assert(UseCRC32Intrinsics, "need AVX and LCMUL instructions support");
967 // Make all state_for calls early since they can emit code
968 LIR_Opr result = rlock_result(x);
969 int flags = 0;
970 switch (x->id()) {
971 case vmIntrinsics::_updateCRC32: {
972 LIRItem crc(x->argument_at(0), this);
973 LIRItem val(x->argument_at(1), this);
974 // val is destroyed by update_crc32
975 val.set_destroys_register();
976 crc.load_item();
977 val.load_item();
978 __ update_crc32(crc.result(), val.result(), result);
979 break;
980 }
981 case vmIntrinsics::_updateBytesCRC32:
982 case vmIntrinsics::_updateByteBufferCRC32: {
983 bool is_updateBytes = (x->id() == vmIntrinsics::_updateBytesCRC32);
984
985 LIRItem crc(x->argument_at(0), this);
986 LIRItem buf(x->argument_at(1), this);
987 LIRItem off(x->argument_at(2), this);
988 LIRItem len(x->argument_at(3), this);
989 buf.load_item();
990 off.load_nonconstant();
991
992 LIR_Opr index = off.result();
993 int offset = is_updateBytes ? arrayOopDesc::base_offset_in_bytes(T_BYTE) : 0;
994 if(off.result()->is_constant()) {
995 index = LIR_OprFact::illegalOpr;
996 offset += off.result()->as_jint();
997 }
998 LIR_Opr base_op = buf.result();
999
1000 #ifndef _LP64
1001 if (!is_updateBytes) { // long b raw address
1002 base_op = new_register(T_INT);
1003 __ convert(Bytecodes::_l2i, buf.result(), base_op);
1004 }
1005 #else
1006 if (index->is_valid()) {
1007 LIR_Opr tmp = new_register(T_LONG);
1008 __ convert(Bytecodes::_i2l, index, tmp);
1009 index = tmp;
1010 }
1011 #endif
1012
1013 LIR_Address* a = new LIR_Address(base_op,
1014 index,
1015 LIR_Address::times_1,
1016 offset,
1017 T_BYTE);
1018 BasicTypeList signature(3);
1019 signature.append(T_INT);
1020 signature.append(T_ADDRESS);
1021 signature.append(T_INT);
1022 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
1023 const LIR_Opr result_reg = result_register_for(x->type());
1024
1025 LIR_Opr addr = new_pointer_register();
1026 __ leal(LIR_OprFact::address(a), addr);
1027
1028 crc.load_item_force(cc->at(0));
1029 __ move(addr, cc->at(1));
1030 len.load_item_force(cc->at(2));
1031
1032 __ call_runtime_leaf(StubRoutines::updateBytesCRC32(), getThreadTemp(), result_reg, cc->args());
1033 __ move(result_reg, result);
1034
1035 break;
1036 }
1037 default: {
1038 ShouldNotReachHere();
1039 }
1040 }
1041 }
1042
1043 // _i2l, _i2f, _i2d, _l2i, _l2f, _l2d, _f2i, _f2l, _f2d, _d2i, _d2l, _d2f
1044 // _i2b, _i2c, _i2s
1045 LIR_Opr fixed_register_for(BasicType type) {
1046 switch (type) {
1047 case T_FLOAT: return FrameMap::fpu0_float_opr;
1048 case T_DOUBLE: return FrameMap::fpu0_double_opr;
1049 case T_INT: return FrameMap::rax_opr;
1050 case T_LONG: return FrameMap::long0_opr;
1051 default: ShouldNotReachHere(); return LIR_OprFact::illegalOpr;
1052 }
1053 }
1054
1055 void LIRGenerator::do_Convert(Convert* x) {
1056 // flags that vary for the different operations and different SSE-settings
1057 bool fixed_input, fixed_result, round_result, needs_stub;
1058
1059 switch (x->op()) {
1060 case Bytecodes::_i2l: // fall through
1061 case Bytecodes::_l2i: // fall through
1062 case Bytecodes::_i2b: // fall through
1063 case Bytecodes::_i2c: // fall through
1064 case Bytecodes::_i2s: fixed_input = false; fixed_result = false; round_result = false; needs_stub = false; break;
1065
1066 case Bytecodes::_f2d: fixed_input = UseSSE == 1; fixed_result = false; round_result = false; needs_stub = false; break;
1067 case Bytecodes::_d2f: fixed_input = false; fixed_result = UseSSE == 1; round_result = UseSSE < 1; needs_stub = false; break;
1068 case Bytecodes::_i2f: fixed_input = false; fixed_result = false; round_result = UseSSE < 1; needs_stub = false; break;
1069 case Bytecodes::_i2d: fixed_input = false; fixed_result = false; round_result = false; needs_stub = false; break;
1070 case Bytecodes::_f2i: fixed_input = false; fixed_result = false; round_result = false; needs_stub = true; break;
1071 case Bytecodes::_d2i: fixed_input = false; fixed_result = false; round_result = false; needs_stub = true; break;
1072 case Bytecodes::_l2f: fixed_input = false; fixed_result = UseSSE >= 1; round_result = UseSSE < 1; needs_stub = false; break;
1073 case Bytecodes::_l2d: fixed_input = false; fixed_result = UseSSE >= 2; round_result = UseSSE < 2; needs_stub = false; break;
1074 case Bytecodes::_f2l: fixed_input = true; fixed_result = true; round_result = false; needs_stub = false; break;
1075 case Bytecodes::_d2l: fixed_input = true; fixed_result = true; round_result = false; needs_stub = false; break;
1076 default: ShouldNotReachHere();
1077 }
1078
1079 LIRItem value(x->value(), this);
1080 value.load_item();
1081 LIR_Opr input = value.result();
1082 LIR_Opr result = rlock(x);
1083
1084 // arguments of lir_convert
1085 LIR_Opr conv_input = input;
1086 LIR_Opr conv_result = result;
1087 ConversionStub* stub = NULL;
1088
1089 if (fixed_input) {
1090 conv_input = fixed_register_for(input->type());
1091 __ move(input, conv_input);
1092 }
1093
1094 assert(fixed_result == false || round_result == false, "cannot set both");
1095 if (fixed_result) {
1096 conv_result = fixed_register_for(result->type());
1097 } else if (round_result) {
1098 result = new_register(result->type());
1099 set_vreg_flag(result, must_start_in_memory);
1100 }
1101
1102 if (needs_stub) {
1103 stub = new ConversionStub(x->op(), conv_input, conv_result);
1104 }
1105
1106 __ convert(x->op(), conv_input, conv_result, stub);
1107
1108 if (result != conv_result) {
1109 __ move(conv_result, result);
1110 }
1111
1112 assert(result->is_virtual(), "result must be virtual register");
1113 set_result(x, result);
1114 }
1115
1116
1117 void LIRGenerator::do_NewInstance(NewInstance* x) {
1118 print_if_not_loaded(x);
1119
1120 CodeEmitInfo* info = state_for(x, x->state());
1121 LIR_Opr reg = result_register_for(x->type());
1122 new_instance(reg, x->klass(), x->is_unresolved(),
1123 FrameMap::rcx_oop_opr,
1124 FrameMap::rdi_oop_opr,
1125 FrameMap::rsi_oop_opr,
1126 LIR_OprFact::illegalOpr,
1127 FrameMap::rdx_metadata_opr, info);
1128 LIR_Opr result = rlock_result(x);
1129 __ move(reg, result);
1130 }
1131
1132
1133 void LIRGenerator::do_NewTypeArray(NewTypeArray* x) {
1134 CodeEmitInfo* info = state_for(x, x->state());
1135
1136 LIRItem length(x->length(), this);
1137 length.load_item_force(FrameMap::rbx_opr);
1138
1139 LIR_Opr reg = result_register_for(x->type());
1140 LIR_Opr tmp1 = FrameMap::rcx_oop_opr;
1141 LIR_Opr tmp2 = FrameMap::rsi_oop_opr;
1142 LIR_Opr tmp3 = FrameMap::rdi_oop_opr;
1143 LIR_Opr tmp4 = reg;
1144 LIR_Opr klass_reg = FrameMap::rdx_metadata_opr;
1145 LIR_Opr len = length.result();
1146 BasicType elem_type = x->elt_type();
1147
1148 __ metadata2reg(ciTypeArrayKlass::make(elem_type)->constant_encoding(), klass_reg);
1149
1150 CodeStub* slow_path = new NewTypeArrayStub(klass_reg, len, reg, info);
1151 __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, elem_type, klass_reg, slow_path);
1152
1153 LIR_Opr result = rlock_result(x);
1154 __ move(reg, result);
1155 }
1156
1157
1158 void LIRGenerator::do_NewObjectArray(NewObjectArray* x) {
1159 LIRItem length(x->length(), this);
1160 // in case of patching (i.e., object class is not yet loaded), we need to reexecute the instruction
1161 // and therefore provide the state before the parameters have been consumed
1162 CodeEmitInfo* patching_info = NULL;
1163 if (!x->klass()->is_loaded() || PatchALot) {
1164 patching_info = state_for(x, x->state_before());
1165 }
1166
1167 CodeEmitInfo* info = state_for(x, x->state());
1168
1169 const LIR_Opr reg = result_register_for(x->type());
1170 LIR_Opr tmp1 = FrameMap::rcx_oop_opr;
1171 LIR_Opr tmp2 = FrameMap::rsi_oop_opr;
1172 LIR_Opr tmp3 = FrameMap::rdi_oop_opr;
1173 LIR_Opr tmp4 = reg;
1174 LIR_Opr klass_reg = FrameMap::rdx_metadata_opr;
1175
1176 length.load_item_force(FrameMap::rbx_opr);
1177 LIR_Opr len = length.result();
1178
1179 CodeStub* slow_path = new NewObjectArrayStub(klass_reg, len, reg, info);
1180 ciKlass* obj = (ciKlass*) ciObjArrayKlass::make(x->klass());
1181 if (obj == ciEnv::unloaded_ciobjarrayklass()) {
1182 BAILOUT("encountered unloaded_ciobjarrayklass due to out of memory error");
1183 }
1184 klass2reg_with_patching(klass_reg, obj, patching_info);
1185 __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, T_OBJECT, klass_reg, slow_path);
1186
1187 LIR_Opr result = rlock_result(x);
1188 __ move(reg, result);
1189 }
1190
1191
1192 void LIRGenerator::do_NewMultiArray(NewMultiArray* x) {
1193 Values* dims = x->dims();
1194 int i = dims->length();
1195 LIRItemList* items = new LIRItemList(dims->length(), NULL);
1196 while (i-- > 0) {
1197 LIRItem* size = new LIRItem(dims->at(i), this);
1198 items->at_put(i, size);
1199 }
1200
1201 // Evaluate state_for early since it may emit code.
1202 CodeEmitInfo* patching_info = NULL;
1203 if (!x->klass()->is_loaded() || PatchALot) {
1204 patching_info = state_for(x, x->state_before());
1205
1206 // Cannot re-use same xhandlers for multiple CodeEmitInfos, so
1207 // clone all handlers (NOTE: Usually this is handled transparently
1208 // by the CodeEmitInfo cloning logic in CodeStub constructors but
1209 // is done explicitly here because a stub isn't being used).
1210 x->set_exception_handlers(new XHandlers(x->exception_handlers()));
1211 }
1212 CodeEmitInfo* info = state_for(x, x->state());
1213
1214 i = dims->length();
1215 while (i-- > 0) {
1216 LIRItem* size = items->at(i);
1217 size->load_nonconstant();
1218
1219 store_stack_parameter(size->result(), in_ByteSize(i*4));
1220 }
1221
1222 LIR_Opr klass_reg = FrameMap::rax_metadata_opr;
1223 klass2reg_with_patching(klass_reg, x->klass(), patching_info);
1224
1225 LIR_Opr rank = FrameMap::rbx_opr;
1226 __ move(LIR_OprFact::intConst(x->rank()), rank);
1227 LIR_Opr varargs = FrameMap::rcx_opr;
1228 __ move(FrameMap::rsp_opr, varargs);
1229 LIR_OprList* args = new LIR_OprList(3);
1230 args->append(klass_reg);
1231 args->append(rank);
1232 args->append(varargs);
1233 LIR_Opr reg = result_register_for(x->type());
1234 __ call_runtime(Runtime1::entry_for(Runtime1::new_multi_array_id),
1235 LIR_OprFact::illegalOpr,
1236 reg, args, info);
1237
1238 LIR_Opr result = rlock_result(x);
1239 __ move(reg, result);
1240 }
1241
1242
1243 void LIRGenerator::do_BlockBegin(BlockBegin* x) {
1244 // nothing to do for now
1245 }
1246
1247
1248 void LIRGenerator::do_CheckCast(CheckCast* x) {
1249 LIRItem obj(x->obj(), this);
1250
1251 CodeEmitInfo* patching_info = NULL;
1252 if (!x->klass()->is_loaded() || (PatchALot && !x->is_incompatible_class_change_check())) {
1253 // must do this before locking the destination register as an oop register,
1254 // and before the obj is loaded (the latter is for deoptimization)
1255 patching_info = state_for(x, x->state_before());
1256 }
1257 obj.load_item();
1258
1259 // info for exceptions
1260 CodeEmitInfo* info_for_exception = state_for(x);
1261
1262 CodeStub* stub;
1263 if (x->is_incompatible_class_change_check()) {
1264 assert(patching_info == NULL, "can't patch this");
1265 stub = new SimpleExceptionStub(Runtime1::throw_incompatible_class_change_error_id, LIR_OprFact::illegalOpr, info_for_exception);
1266 } else {
1267 stub = new SimpleExceptionStub(Runtime1::throw_class_cast_exception_id, obj.result(), info_for_exception);
1268 }
1269 LIR_Opr reg = rlock_result(x);
1270 LIR_Opr tmp3 = LIR_OprFact::illegalOpr;
1271 if (!x->klass()->is_loaded() || UseCompressedClassPointers) {
1272 tmp3 = new_register(objectType);
1273 }
1274 __ checkcast(reg, obj.result(), x->klass(),
1275 new_register(objectType), new_register(objectType), tmp3,
1276 x->direct_compare(), info_for_exception, patching_info, stub,
1277 x->profiled_method(), x->profiled_bci());
1278 }
1279
1280
1281 void LIRGenerator::do_InstanceOf(InstanceOf* x) {
1282 LIRItem obj(x->obj(), this);
1283
1284 // result and test object may not be in same register
1285 LIR_Opr reg = rlock_result(x);
1286 CodeEmitInfo* patching_info = NULL;
1287 if ((!x->klass()->is_loaded() || PatchALot)) {
1288 // must do this before locking the destination register as an oop register
1289 patching_info = state_for(x, x->state_before());
1290 }
1291 obj.load_item();
1292 LIR_Opr tmp3 = LIR_OprFact::illegalOpr;
1293 if (!x->klass()->is_loaded() || UseCompressedClassPointers) {
1294 tmp3 = new_register(objectType);
1295 }
1296 __ instanceof(reg, obj.result(), x->klass(),
1297 new_register(objectType), new_register(objectType), tmp3,
1298 x->direct_compare(), patching_info, x->profiled_method(), x->profiled_bci());
1299 }
1300
1301
1302 void LIRGenerator::do_If(If* x) {
1303 assert(x->number_of_sux() == 2, "inconsistency");
1304 ValueTag tag = x->x()->type()->tag();
1305 bool is_safepoint = x->is_safepoint();
1306
1307 If::Condition cond = x->cond();
1308
1309 LIRItem xitem(x->x(), this);
1310 LIRItem yitem(x->y(), this);
1311 LIRItem* xin = &xitem;
1312 LIRItem* yin = &yitem;
1313
1314 if (tag == longTag) {
1315 // for longs, only conditions "eql", "neq", "lss", "geq" are valid;
1316 // mirror for other conditions
1317 if (cond == If::gtr || cond == If::leq) {
1318 cond = Instruction::mirror(cond);
1319 xin = &yitem;
1320 yin = &xitem;
1321 }
1322 xin->set_destroys_register();
1323 }
1324 xin->load_item();
1325 if (tag == longTag && yin->is_constant() && yin->get_jlong_constant() == 0 && (cond == If::eql || cond == If::neq)) {
1326 // inline long zero
1327 yin->dont_load_item();
1328 } else if (tag == longTag || tag == floatTag || tag == doubleTag) {
1329 // longs cannot handle constants at right side
1330 yin->load_item();
1331 } else {
1332 yin->dont_load_item();
1333 }
1334
1335 // add safepoint before generating condition code so it can be recomputed
1336 if (x->is_safepoint()) {
1337 // increment backedge counter if needed
1338 increment_backedge_counter(state_for(x, x->state_before()), x->profiled_bci());
1339 __ safepoint(LIR_OprFact::illegalOpr, state_for(x, x->state_before()));
1340 }
1341 set_no_result(x);
1342
1343 LIR_Opr left = xin->result();
1344 LIR_Opr right = yin->result();
1345 __ cmp(lir_cond(cond), left, right);
1346 // Generate branch profiling. Profiling code doesn't kill flags.
1347 profile_branch(x, cond);
1348 move_to_phi(x->state());
1349 if (x->x()->type()->is_float_kind()) {
1350 __ branch(lir_cond(cond), right->type(), x->tsux(), x->usux());
1351 } else {
1352 __ branch(lir_cond(cond), right->type(), x->tsux());
1353 }
1354 assert(x->default_sux() == x->fsux(), "wrong destination above");
1355 __ jump(x->default_sux());
1356 }
1357
1358
1359 LIR_Opr LIRGenerator::getThreadPointer() {
1360 #ifdef _LP64
1361 return FrameMap::as_pointer_opr(r15_thread);
1362 #else
1363 LIR_Opr result = new_register(T_INT);
1364 __ get_thread(result);
1365 return result;
1366 #endif //
1367 }
1368
1369 void LIRGenerator::trace_block_entry(BlockBegin* block) {
1370 store_stack_parameter(LIR_OprFact::intConst(block->block_id()), in_ByteSize(0));
1371 LIR_OprList* args = new LIR_OprList();
1372 address func = CAST_FROM_FN_PTR(address, Runtime1::trace_block_entry);
1373 __ call_runtime_leaf(func, LIR_OprFact::illegalOpr, LIR_OprFact::illegalOpr, args);
1374 }
1375
1376
1377 void LIRGenerator::volatile_field_store(LIR_Opr value, LIR_Address* address,
1378 CodeEmitInfo* info) {
1379 if (address->type() == T_LONG) {
1380 address = new LIR_Address(address->base(),
1381 address->index(), address->scale(),
1382 address->disp(), T_DOUBLE);
1383 // Transfer the value atomically by using FP moves. This means
1384 // the value has to be moved between CPU and FPU registers. It
1385 // always has to be moved through spill slot since there's no
1386 // quick way to pack the value into an SSE register.
1387 LIR_Opr temp_double = new_register(T_DOUBLE);
1388 LIR_Opr spill = new_register(T_LONG);
1389 set_vreg_flag(spill, must_start_in_memory);
1390 __ move(value, spill);
1391 __ volatile_move(spill, temp_double, T_LONG);
1392 __ volatile_move(temp_double, LIR_OprFact::address(address), T_LONG, info);
1393 } else {
1394 __ store(value, address, info);
1395 }
1396 }
1397
1398
1399
1400 void LIRGenerator::volatile_field_load(LIR_Address* address, LIR_Opr result,
1401 CodeEmitInfo* info) {
1402 if (address->type() == T_LONG) {
1403 address = new LIR_Address(address->base(),
1404 address->index(), address->scale(),
1405 address->disp(), T_DOUBLE);
1406 // Transfer the value atomically by using FP moves. This means
1407 // the value has to be moved between CPU and FPU registers. In
1408 // SSE0 and SSE1 mode it has to be moved through spill slot but in
1409 // SSE2+ mode it can be moved directly.
1410 LIR_Opr temp_double = new_register(T_DOUBLE);
1411 __ volatile_move(LIR_OprFact::address(address), temp_double, T_LONG, info);
1412 __ volatile_move(temp_double, result, T_LONG);
1413 if (UseSSE < 2) {
1414 // no spill slot needed in SSE2 mode because xmm->cpu register move is possible
1415 set_vreg_flag(result, must_start_in_memory);
1416 }
1417 } else {
1418 __ load(address, result, info);
1419 }
1420 }
1421
1422 void LIRGenerator::get_Object_unsafe(LIR_Opr dst, LIR_Opr src, LIR_Opr offset,
1423 BasicType type, bool is_volatile) {
1424 if (is_volatile && type == T_LONG) {
1425 LIR_Address* addr = new LIR_Address(src, offset, T_DOUBLE);
1426 LIR_Opr tmp = new_register(T_DOUBLE);
1427 __ load(addr, tmp);
1428 LIR_Opr spill = new_register(T_LONG);
1429 set_vreg_flag(spill, must_start_in_memory);
1430 __ move(tmp, spill);
1431 __ move(spill, dst);
1432 } else {
1433 LIR_Address* addr = new LIR_Address(src, offset, type);
1434 __ load(addr, dst);
1435 }
1436 }
1437
1438
1439 void LIRGenerator::put_Object_unsafe(LIR_Opr src, LIR_Opr offset, LIR_Opr data,
1440 BasicType type, bool is_volatile) {
1441 if (is_volatile && type == T_LONG) {
1442 LIR_Address* addr = new LIR_Address(src, offset, T_DOUBLE);
1443 LIR_Opr tmp = new_register(T_DOUBLE);
1444 LIR_Opr spill = new_register(T_DOUBLE);
1445 set_vreg_flag(spill, must_start_in_memory);
1446 __ move(data, spill);
1447 __ move(spill, tmp);
1448 __ move(tmp, addr);
1449 } else {
1450 LIR_Address* addr = new LIR_Address(src, offset, type);
1451 bool is_obj = (type == T_ARRAY || type == T_OBJECT);
1452 if (is_obj) {
1453 // Do the pre-write barrier, if any.
1454 pre_barrier(LIR_OprFact::address(addr), LIR_OprFact::illegalOpr /* pre_val */,
1455 true /* do_load */, false /* patch */, NULL);
1456 __ move(data, addr);
1457 assert(src->is_register(), "must be register");
1458 // Seems to be a precise address
1459 post_barrier(LIR_OprFact::address(addr), data);
1460 } else {
1461 __ move(data, addr);
1462 }
1463 }
1464 }
1465
1466 void LIRGenerator::do_UnsafeGetAndSetObject(UnsafeGetAndSetObject* x) {
1467 BasicType type = x->basic_type();
1468 LIRItem src(x->object(), this);
1469 LIRItem off(x->offset(), this);
1470 LIRItem value(x->value(), this);
1471
1472 src.load_item();
1473 value.load_item();
1474 off.load_nonconstant();
1475
1476 LIR_Opr dst = rlock_result(x, type);
1477 LIR_Opr data = value.result();
1478 bool is_obj = (type == T_ARRAY || type == T_OBJECT);
1479 LIR_Opr offset = off.result();
1480
1481 assert (type == T_INT || (!x->is_add() && is_obj) LP64_ONLY( || type == T_LONG ), "unexpected type");
1482 LIR_Address* addr;
1483 if (offset->is_constant()) {
1484 #ifdef _LP64
1485 jlong c = offset->as_jlong();
1486 if ((jlong)((jint)c) == c) {
1487 addr = new LIR_Address(src.result(), (jint)c, type);
1488 } else {
1489 LIR_Opr tmp = new_register(T_LONG);
1490 __ move(offset, tmp);
1491 addr = new LIR_Address(src.result(), tmp, type);
1492 }
1493 #else
1494 addr = new LIR_Address(src.result(), offset->as_jint(), type);
1495 #endif
1496 } else {
1497 addr = new LIR_Address(src.result(), offset, type);
1498 }
1499
1500 // Because we want a 2-arg form of xchg and xadd
1501 __ move(data, dst);
1502
1503 if (x->is_add()) {
1504 __ xadd(LIR_OprFact::address(addr), dst, dst, LIR_OprFact::illegalOpr);
1505 } else {
1506 if (is_obj) {
1507 // Do the pre-write barrier, if any.
1508 pre_barrier(LIR_OprFact::address(addr), LIR_OprFact::illegalOpr /* pre_val */,
1509 true /* do_load */, false /* patch */, NULL);
1510 }
1511 __ xchg(LIR_OprFact::address(addr), dst, dst, LIR_OprFact::illegalOpr);
1512 if (is_obj) {
1513 // Seems to be a precise address
1514 post_barrier(LIR_OprFact::address(addr), data);
1515 }
1516 }
1517 }