1 /*
2 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 # include "incls/_precompiled.incl"
26 # include "incls/_c1_LIRGenerator_sparc.cpp.incl"
27
28 #ifdef ASSERT
29 #define __ gen()->lir(__FILE__, __LINE__)->
30 #else
31 #define __ gen()->lir()->
32 #endif
33
34 void LIRItem::load_byte_item() {
35 // byte loads use same registers as other loads
36 load_item();
37 }
38
39
40 void LIRItem::load_nonconstant() {
41 LIR_Opr r = value()->operand();
42 if (_gen->can_inline_as_constant(value())) {
43 if (!r->is_constant()) {
44 r = LIR_OprFact::value_type(value()->type());
45 }
46 _result = r;
47 } else {
48 load_item();
49 }
50 }
51
52
53 //--------------------------------------------------------------
54 // LIRGenerator
55 //--------------------------------------------------------------
56
57 LIR_Opr LIRGenerator::exceptionOopOpr() { return FrameMap::Oexception_opr; }
58 LIR_Opr LIRGenerator::exceptionPcOpr() { return FrameMap::Oissuing_pc_opr; }
59 LIR_Opr LIRGenerator::syncTempOpr() { return new_register(T_OBJECT); }
60 LIR_Opr LIRGenerator::getThreadTemp() { return rlock_callee_saved(T_INT); }
61
62 LIR_Opr LIRGenerator::result_register_for(ValueType* type, bool callee) {
63 LIR_Opr opr;
64 switch (type->tag()) {
65 case intTag: opr = callee ? FrameMap::I0_opr : FrameMap::O0_opr; break;
66 case objectTag: opr = callee ? FrameMap::I0_oop_opr : FrameMap::O0_oop_opr; break;
67 case longTag: opr = callee ? FrameMap::in_long_opr : FrameMap::out_long_opr; break;
68 case floatTag: opr = FrameMap::F0_opr; break;
69 case doubleTag: opr = FrameMap::F0_double_opr; break;
70
71 case addressTag:
72 default: ShouldNotReachHere(); return LIR_OprFact::illegalOpr;
73 }
74
75 assert(opr->type_field() == as_OprType(as_BasicType(type)), "type mismatch");
76 return opr;
77 }
78
79 LIR_Opr LIRGenerator::rlock_callee_saved(BasicType type) {
80 LIR_Opr reg = new_register(type);
81 set_vreg_flag(reg, callee_saved);
82 return reg;
83 }
84
85
86 LIR_Opr LIRGenerator::rlock_byte(BasicType type) {
87 return new_register(T_INT);
88 }
89
90
91
92
93
94 //--------- loading items into registers --------------------------------
95
96 // SPARC cannot inline all constants
97 bool LIRGenerator::can_store_as_constant(Value v, BasicType type) const {
98 if (v->type()->as_IntConstant() != NULL) {
99 return v->type()->as_IntConstant()->value() == 0;
100 } else if (v->type()->as_LongConstant() != NULL) {
101 return v->type()->as_LongConstant()->value() == 0L;
102 } else if (v->type()->as_ObjectConstant() != NULL) {
103 return v->type()->as_ObjectConstant()->value()->is_null_object();
104 } else {
105 return false;
106 }
107 }
108
109
110 // only simm13 constants can be inlined
111 bool LIRGenerator:: can_inline_as_constant(Value i) const {
112 if (i->type()->as_IntConstant() != NULL) {
113 return Assembler::is_simm13(i->type()->as_IntConstant()->value());
114 } else {
115 return can_store_as_constant(i, as_BasicType(i->type()));
116 }
117 }
118
119
120 bool LIRGenerator:: can_inline_as_constant(LIR_Const* c) const {
121 if (c->type() == T_INT) {
122 return Assembler::is_simm13(c->as_jint());
123 }
124 return false;
125 }
126
127
128 LIR_Opr LIRGenerator::safepoint_poll_register() {
129 return new_register(T_INT);
130 }
131
132
133
134 LIR_Address* LIRGenerator::generate_address(LIR_Opr base, LIR_Opr index,
135 int shift, int disp, BasicType type) {
136 assert(base->is_register(), "must be");
137
138 // accumulate fixed displacements
139 if (index->is_constant()) {
140 disp += index->as_constant_ptr()->as_jint() << shift;
141 index = LIR_OprFact::illegalOpr;
142 }
143
144 if (index->is_register()) {
145 // apply the shift and accumulate the displacement
146 if (shift > 0) {
147 LIR_Opr tmp = new_pointer_register();
148 __ shift_left(index, shift, tmp);
149 index = tmp;
150 }
151 if (disp != 0) {
152 LIR_Opr tmp = new_pointer_register();
153 if (Assembler::is_simm13(disp)) {
154 __ add(tmp, LIR_OprFact::intptrConst(disp), tmp);
155 index = tmp;
156 } else {
157 __ move(LIR_OprFact::intptrConst(disp), tmp);
158 __ add(tmp, index, tmp);
159 index = tmp;
160 }
161 disp = 0;
162 }
163 } else if (disp != 0 && !Assembler::is_simm13(disp)) {
164 // index is illegal so replace it with the displacement loaded into a register
165 index = new_pointer_register();
166 __ move(LIR_OprFact::intptrConst(disp), index);
167 disp = 0;
168 }
169
170 // at this point we either have base + index or base + displacement
171 if (disp == 0) {
172 return new LIR_Address(base, index, type);
173 } else {
174 assert(Assembler::is_simm13(disp), "must be");
175 return new LIR_Address(base, disp, type);
176 }
177 }
178
179
180 LIR_Address* LIRGenerator::emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr,
181 BasicType type, bool needs_card_mark) {
182 int elem_size = type2aelembytes(type);
183 int shift = exact_log2(elem_size);
184
185 LIR_Opr base_opr;
186 int offset = arrayOopDesc::base_offset_in_bytes(type);
187
188 if (index_opr->is_constant()) {
189 int i = index_opr->as_constant_ptr()->as_jint();
190 int array_offset = i * elem_size;
191 if (Assembler::is_simm13(array_offset + offset)) {
192 base_opr = array_opr;
193 offset = array_offset + offset;
194 } else {
195 base_opr = new_pointer_register();
196 if (Assembler::is_simm13(array_offset)) {
197 __ add(array_opr, LIR_OprFact::intptrConst(array_offset), base_opr);
198 } else {
199 __ move(LIR_OprFact::intptrConst(array_offset), base_opr);
200 __ add(base_opr, array_opr, base_opr);
201 }
202 }
203 } else {
204 #ifdef _LP64
205 if (index_opr->type() == T_INT) {
206 LIR_Opr tmp = new_register(T_LONG);
207 __ convert(Bytecodes::_i2l, index_opr, tmp);
208 index_opr = tmp;
209 }
210 #endif
211
212 base_opr = new_pointer_register();
213 assert (index_opr->is_register(), "Must be register");
214 if (shift > 0) {
215 __ shift_left(index_opr, shift, base_opr);
216 __ add(base_opr, array_opr, base_opr);
217 } else {
218 __ add(index_opr, array_opr, base_opr);
219 }
220 }
221 if (needs_card_mark) {
222 LIR_Opr ptr = new_pointer_register();
223 __ add(base_opr, LIR_OprFact::intptrConst(offset), ptr);
224 return new LIR_Address(ptr, type);
225 } else {
226 return new LIR_Address(base_opr, offset, type);
227 }
228 }
229
230 LIR_Opr LIRGenerator::load_immediate(int x, BasicType type) {
231 LIR_Opr r;
232 if (type == T_LONG) {
233 r = LIR_OprFact::longConst(x);
234 } else if (type == T_INT) {
235 r = LIR_OprFact::intConst(x);
236 } else {
237 ShouldNotReachHere();
238 }
239 if (!Assembler::is_simm13(x)) {
240 LIR_Opr tmp = new_register(type);
241 __ move(r, tmp);
242 return tmp;
243 }
244 return r;
245 }
246
247 void LIRGenerator::increment_counter(address counter, BasicType type, int step) {
248 LIR_Opr pointer = new_pointer_register();
249 __ move(LIR_OprFact::intptrConst(counter), pointer);
250 LIR_Address* addr = new LIR_Address(pointer, type);
251 increment_counter(addr, step);
252 }
253
254 void LIRGenerator::increment_counter(LIR_Address* addr, int step) {
255 LIR_Opr temp = new_register(addr->type());
256 __ move(addr, temp);
257 __ add(temp, load_immediate(step, addr->type()), temp);
258 __ move(temp, addr);
259 }
260
261 void LIRGenerator::cmp_mem_int(LIR_Condition condition, LIR_Opr base, int disp, int c, CodeEmitInfo* info) {
262 LIR_Opr o7opr = FrameMap::O7_opr;
263 __ load(new LIR_Address(base, disp, T_INT), o7opr, info);
264 __ cmp(condition, o7opr, c);
265 }
266
267
268 void LIRGenerator::cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, int disp, BasicType type, CodeEmitInfo* info) {
269 LIR_Opr o7opr = FrameMap::O7_opr;
270 __ load(new LIR_Address(base, disp, type), o7opr, info);
271 __ cmp(condition, reg, o7opr);
272 }
273
274
275 void LIRGenerator::cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, LIR_Opr disp, BasicType type, CodeEmitInfo* info) {
276 LIR_Opr o7opr = FrameMap::O7_opr;
277 __ load(new LIR_Address(base, disp, type), o7opr, info);
278 __ cmp(condition, reg, o7opr);
279 }
280
281
282 bool LIRGenerator::strength_reduce_multiply(LIR_Opr left, int c, LIR_Opr result, LIR_Opr tmp) {
283 assert(left != result, "should be different registers");
284 if (is_power_of_2(c + 1)) {
285 __ shift_left(left, log2_intptr(c + 1), result);
286 __ sub(result, left, result);
287 return true;
288 } else if (is_power_of_2(c - 1)) {
289 __ shift_left(left, log2_intptr(c - 1), result);
290 __ add(result, left, result);
291 return true;
292 }
293 return false;
294 }
295
296
297 void LIRGenerator::store_stack_parameter (LIR_Opr item, ByteSize offset_from_sp) {
298 BasicType t = item->type();
299 LIR_Opr sp_opr = FrameMap::SP_opr;
300 if ((t == T_LONG || t == T_DOUBLE) &&
301 ((in_bytes(offset_from_sp) - STACK_BIAS) % 8 != 0)) {
302 __ unaligned_move(item, new LIR_Address(sp_opr, in_bytes(offset_from_sp), t));
303 } else {
304 __ move(item, new LIR_Address(sp_opr, in_bytes(offset_from_sp), t));
305 }
306 }
307
308 //----------------------------------------------------------------------
309 // visitor functions
310 //----------------------------------------------------------------------
311
312
313 void LIRGenerator::do_StoreIndexed(StoreIndexed* x) {
314 assert(x->is_root(),"");
315 bool needs_range_check = true;
316 bool use_length = x->length() != NULL;
317 bool obj_store = x->elt_type() == T_ARRAY || x->elt_type() == T_OBJECT;
318 bool needs_store_check = obj_store && (x->value()->as_Constant() == NULL ||
319 !get_jobject_constant(x->value())->is_null_object());
320
321 LIRItem array(x->array(), this);
322 LIRItem index(x->index(), this);
323 LIRItem value(x->value(), this);
324 LIRItem length(this);
325
326 array.load_item();
327 index.load_nonconstant();
328
329 if (use_length) {
330 needs_range_check = x->compute_needs_range_check();
331 if (needs_range_check) {
332 length.set_instruction(x->length());
333 length.load_item();
334 }
335 }
336 if (needs_store_check) {
337 value.load_item();
338 } else {
339 value.load_for_store(x->elt_type());
340 }
341
342 set_no_result(x);
343
344 // the CodeEmitInfo must be duplicated for each different
345 // LIR-instruction because spilling can occur anywhere between two
346 // instructions and so the debug information must be different
347 CodeEmitInfo* range_check_info = state_for(x);
348 CodeEmitInfo* null_check_info = NULL;
349 if (x->needs_null_check()) {
350 null_check_info = new CodeEmitInfo(range_check_info);
351 }
352
353 // emit array address setup early so it schedules better
354 LIR_Address* array_addr = emit_array_address(array.result(), index.result(), x->elt_type(), obj_store);
355
356 if (GenerateRangeChecks && needs_range_check) {
357 if (use_length) {
358 __ cmp(lir_cond_belowEqual, length.result(), index.result());
359 __ branch(lir_cond_belowEqual, T_INT, new RangeCheckStub(range_check_info, index.result()));
360 } else {
361 array_range_check(array.result(), index.result(), null_check_info, range_check_info);
362 // range_check also does the null check
363 null_check_info = NULL;
364 }
365 }
366
367 if (GenerateArrayStoreCheck && needs_store_check) {
368 LIR_Opr tmp1 = FrameMap::G1_opr;
369 LIR_Opr tmp2 = FrameMap::G3_opr;
370 LIR_Opr tmp3 = FrameMap::G5_opr;
371
372 CodeEmitInfo* store_check_info = new CodeEmitInfo(range_check_info);
373 __ store_check(value.result(), array.result(), tmp1, tmp2, tmp3, store_check_info);
374 }
375
376 if (obj_store) {
377 // Needs GC write barriers.
378 pre_barrier(LIR_OprFact::address(array_addr), false, NULL);
379 }
380 __ move(value.result(), array_addr, null_check_info);
381 if (obj_store) {
382 // Precise card mark
383 post_barrier(LIR_OprFact::address(array_addr), value.result());
384 }
385 }
386
387
388 void LIRGenerator::do_MonitorEnter(MonitorEnter* x) {
389 assert(x->is_root(),"");
390 LIRItem obj(x->obj(), this);
391 obj.load_item();
392
393 set_no_result(x);
394
395 LIR_Opr lock = FrameMap::G1_opr;
396 LIR_Opr scratch = FrameMap::G3_opr;
397 LIR_Opr hdr = FrameMap::G4_opr;
398
399 CodeEmitInfo* info_for_exception = NULL;
400 if (x->needs_null_check()) {
401 info_for_exception = state_for(x, x->lock_stack_before());
402 }
403
404 // this CodeEmitInfo must not have the xhandlers because here the
405 // object is already locked (xhandlers expects object to be unlocked)
406 CodeEmitInfo* info = state_for(x, x->state(), true);
407 monitor_enter(obj.result(), lock, hdr, scratch, x->monitor_no(), info_for_exception, info);
408 }
409
410
411 void LIRGenerator::do_MonitorExit(MonitorExit* x) {
412 assert(x->is_root(),"");
413 LIRItem obj(x->obj(), this);
414 obj.dont_load_item();
415
416 set_no_result(x);
417 LIR_Opr lock = FrameMap::G1_opr;
418 LIR_Opr hdr = FrameMap::G3_opr;
419 LIR_Opr obj_temp = FrameMap::G4_opr;
420 monitor_exit(obj_temp, lock, hdr, LIR_OprFact::illegalOpr, x->monitor_no());
421 }
422
423
424 // _ineg, _lneg, _fneg, _dneg
425 void LIRGenerator::do_NegateOp(NegateOp* x) {
426 LIRItem value(x->x(), this);
427 value.load_item();
428 LIR_Opr reg = rlock_result(x);
429 __ negate(value.result(), reg);
430 }
431
432
433
434 // for _fadd, _fmul, _fsub, _fdiv, _frem
435 // _dadd, _dmul, _dsub, _ddiv, _drem
436 void LIRGenerator::do_ArithmeticOp_FPU(ArithmeticOp* x) {
437 switch (x->op()) {
438 case Bytecodes::_fadd:
439 case Bytecodes::_fmul:
440 case Bytecodes::_fsub:
441 case Bytecodes::_fdiv:
442 case Bytecodes::_dadd:
443 case Bytecodes::_dmul:
444 case Bytecodes::_dsub:
445 case Bytecodes::_ddiv: {
446 LIRItem left(x->x(), this);
447 LIRItem right(x->y(), this);
448 left.load_item();
449 right.load_item();
450 rlock_result(x);
451 arithmetic_op_fpu(x->op(), x->operand(), left.result(), right.result(), x->is_strictfp());
452 }
453 break;
454
455 case Bytecodes::_frem:
456 case Bytecodes::_drem: {
457 address entry;
458 switch (x->op()) {
459 case Bytecodes::_frem:
460 entry = CAST_FROM_FN_PTR(address, SharedRuntime::frem);
461 break;
462 case Bytecodes::_drem:
463 entry = CAST_FROM_FN_PTR(address, SharedRuntime::drem);
464 break;
465 default:
466 ShouldNotReachHere();
467 }
468 LIR_Opr result = call_runtime(x->x(), x->y(), entry, x->type(), NULL);
469 set_result(x, result);
470 }
471 break;
472
473 default: ShouldNotReachHere();
474 }
475 }
476
477
478 // for _ladd, _lmul, _lsub, _ldiv, _lrem
479 void LIRGenerator::do_ArithmeticOp_Long(ArithmeticOp* x) {
480 switch (x->op()) {
481 case Bytecodes::_lrem:
482 case Bytecodes::_lmul:
483 case Bytecodes::_ldiv: {
484
485 if (x->op() == Bytecodes::_ldiv || x->op() == Bytecodes::_lrem) {
486 LIRItem right(x->y(), this);
487 right.load_item();
488
489 CodeEmitInfo* info = state_for(x);
490 LIR_Opr item = right.result();
491 assert(item->is_register(), "must be");
492 __ cmp(lir_cond_equal, item, LIR_OprFact::longConst(0));
493 __ branch(lir_cond_equal, T_LONG, new DivByZeroStub(info));
494 }
495
496 address entry;
497 switch (x->op()) {
498 case Bytecodes::_lrem:
499 entry = CAST_FROM_FN_PTR(address, SharedRuntime::lrem);
500 break; // check if dividend is 0 is done elsewhere
501 case Bytecodes::_ldiv:
502 entry = CAST_FROM_FN_PTR(address, SharedRuntime::ldiv);
503 break; // check if dividend is 0 is done elsewhere
504 case Bytecodes::_lmul:
505 entry = CAST_FROM_FN_PTR(address, SharedRuntime::lmul);
506 break;
507 default:
508 ShouldNotReachHere();
509 }
510
511 // order of arguments to runtime call is reversed.
512 LIR_Opr result = call_runtime(x->y(), x->x(), entry, x->type(), NULL);
513 set_result(x, result);
514 break;
515 }
516 case Bytecodes::_ladd:
517 case Bytecodes::_lsub: {
518 LIRItem left(x->x(), this);
519 LIRItem right(x->y(), this);
520 left.load_item();
521 right.load_item();
522 rlock_result(x);
523
524 arithmetic_op_long(x->op(), x->operand(), left.result(), right.result(), NULL);
525 break;
526 }
527 default: ShouldNotReachHere();
528 }
529 }
530
531
532 // Returns if item is an int constant that can be represented by a simm13
533 static bool is_simm13(LIR_Opr item) {
534 if (item->is_constant() && item->type() == T_INT) {
535 return Assembler::is_simm13(item->as_constant_ptr()->as_jint());
536 } else {
537 return false;
538 }
539 }
540
541
542 // for: _iadd, _imul, _isub, _idiv, _irem
543 void LIRGenerator::do_ArithmeticOp_Int(ArithmeticOp* x) {
544 bool is_div_rem = x->op() == Bytecodes::_idiv || x->op() == Bytecodes::_irem;
545 LIRItem left(x->x(), this);
546 LIRItem right(x->y(), this);
547 // missing test if instr is commutative and if we should swap
548 right.load_nonconstant();
549 assert(right.is_constant() || right.is_register(), "wrong state of right");
550 left.load_item();
551 rlock_result(x);
552 if (is_div_rem) {
553 CodeEmitInfo* info = state_for(x);
554 LIR_Opr tmp = FrameMap::G1_opr;
555 if (x->op() == Bytecodes::_irem) {
556 __ irem(left.result(), right.result(), x->operand(), tmp, info);
557 } else if (x->op() == Bytecodes::_idiv) {
558 __ idiv(left.result(), right.result(), x->operand(), tmp, info);
559 }
560 } else {
561 arithmetic_op_int(x->op(), x->operand(), left.result(), right.result(), FrameMap::G1_opr);
562 }
563 }
564
565
566 void LIRGenerator::do_ArithmeticOp(ArithmeticOp* x) {
567 ValueTag tag = x->type()->tag();
568 assert(x->x()->type()->tag() == tag && x->y()->type()->tag() == tag, "wrong parameters");
569 switch (tag) {
570 case floatTag:
571 case doubleTag: do_ArithmeticOp_FPU(x); return;
572 case longTag: do_ArithmeticOp_Long(x); return;
573 case intTag: do_ArithmeticOp_Int(x); return;
574 }
575 ShouldNotReachHere();
576 }
577
578
579 // _ishl, _lshl, _ishr, _lshr, _iushr, _lushr
580 void LIRGenerator::do_ShiftOp(ShiftOp* x) {
581 LIRItem value(x->x(), this);
582 LIRItem count(x->y(), this);
583 // Long shift destroys count register
584 if (value.type()->is_long()) {
585 count.set_destroys_register();
586 }
587 value.load_item();
588 // the old backend doesn't support this
589 if (count.is_constant() && count.type()->as_IntConstant() != NULL && value.type()->is_int()) {
590 jint c = count.get_jint_constant() & 0x1f;
591 assert(c >= 0 && c < 32, "should be small");
592 count.dont_load_item();
593 } else {
594 count.load_item();
595 }
596 LIR_Opr reg = rlock_result(x);
597 shift_op(x->op(), reg, value.result(), count.result(), LIR_OprFact::illegalOpr);
598 }
599
600
601 // _iand, _land, _ior, _lor, _ixor, _lxor
602 void LIRGenerator::do_LogicOp(LogicOp* x) {
603 LIRItem left(x->x(), this);
604 LIRItem right(x->y(), this);
605
606 left.load_item();
607 right.load_nonconstant();
608 LIR_Opr reg = rlock_result(x);
609
610 logic_op(x->op(), reg, left.result(), right.result());
611 }
612
613
614
615 // _lcmp, _fcmpl, _fcmpg, _dcmpl, _dcmpg
616 void LIRGenerator::do_CompareOp(CompareOp* x) {
617 LIRItem left(x->x(), this);
618 LIRItem right(x->y(), this);
619 left.load_item();
620 right.load_item();
621 LIR_Opr reg = rlock_result(x);
622 if (x->x()->type()->is_float_kind()) {
623 Bytecodes::Code code = x->op();
624 __ fcmp2int(left.result(), right.result(), reg, (code == Bytecodes::_fcmpl || code == Bytecodes::_dcmpl));
625 } else if (x->x()->type()->tag() == longTag) {
626 __ lcmp2int(left.result(), right.result(), reg);
627 } else {
628 Unimplemented();
629 }
630 }
631
632
633 void LIRGenerator::do_AttemptUpdate(Intrinsic* x) {
634 assert(x->number_of_arguments() == 3, "wrong type");
635 LIRItem obj (x->argument_at(0), this); // AtomicLong object
636 LIRItem cmp_value (x->argument_at(1), this); // value to compare with field
637 LIRItem new_value (x->argument_at(2), this); // replace field with new_value if it matches cmp_value
638
639 obj.load_item();
640 cmp_value.load_item();
641 new_value.load_item();
642
643 // generate compare-and-swap and produce zero condition if swap occurs
644 int value_offset = sun_misc_AtomicLongCSImpl::value_offset();
645 LIR_Opr addr = FrameMap::O7_opr;
646 __ add(obj.result(), LIR_OprFact::intConst(value_offset), addr);
647 LIR_Opr t1 = FrameMap::G1_opr; // temp for 64-bit value
648 LIR_Opr t2 = FrameMap::G3_opr; // temp for 64-bit value
649 __ cas_long(addr, cmp_value.result(), new_value.result(), t1, t2);
650
651 // generate conditional move of boolean result
652 LIR_Opr result = rlock_result(x);
653 __ cmove(lir_cond_equal, LIR_OprFact::intConst(1), LIR_OprFact::intConst(0), result);
654 }
655
656
657 void LIRGenerator::do_CompareAndSwap(Intrinsic* x, ValueType* type) {
658 assert(x->number_of_arguments() == 4, "wrong type");
659 LIRItem obj (x->argument_at(0), this); // object
660 LIRItem offset(x->argument_at(1), this); // offset of field
661 LIRItem cmp (x->argument_at(2), this); // value to compare with field
662 LIRItem val (x->argument_at(3), this); // replace field with val if matches cmp
663
664 // Use temps to avoid kills
665 LIR_Opr t1 = FrameMap::G1_opr;
666 LIR_Opr t2 = FrameMap::G3_opr;
667 LIR_Opr addr = new_pointer_register();
668
669 // get address of field
670 obj.load_item();
671 offset.load_item();
672 cmp.load_item();
673 val.load_item();
674
675 __ add(obj.result(), offset.result(), addr);
676
677 if (type == objectType) { // Write-barrier needed for Object fields.
678 pre_barrier(addr, false, NULL);
679 }
680
681 if (type == objectType)
682 __ cas_obj(addr, cmp.result(), val.result(), t1, t2);
683 else if (type == intType)
684 __ cas_int(addr, cmp.result(), val.result(), t1, t2);
685 else if (type == longType)
686 __ cas_long(addr, cmp.result(), val.result(), t1, t2);
687 else {
688 ShouldNotReachHere();
689 }
690
691 // generate conditional move of boolean result
692 LIR_Opr result = rlock_result(x);
693 __ cmove(lir_cond_equal, LIR_OprFact::intConst(1), LIR_OprFact::intConst(0), result);
694 if (type == objectType) { // Write-barrier needed for Object fields.
695 // Precise card mark since could either be object or array
696 post_barrier(addr, val.result());
697 }
698 }
699
700
701 void LIRGenerator::do_MathIntrinsic(Intrinsic* x) {
702 switch (x->id()) {
703 case vmIntrinsics::_dabs:
704 case vmIntrinsics::_dsqrt: {
705 assert(x->number_of_arguments() == 1, "wrong type");
706 LIRItem value(x->argument_at(0), this);
707 value.load_item();
708 LIR_Opr dst = rlock_result(x);
709
710 switch (x->id()) {
711 case vmIntrinsics::_dsqrt: {
712 __ sqrt(value.result(), dst, LIR_OprFact::illegalOpr);
713 break;
714 }
715 case vmIntrinsics::_dabs: {
716 __ abs(value.result(), dst, LIR_OprFact::illegalOpr);
717 break;
718 }
719 }
720 break;
721 }
722 case vmIntrinsics::_dlog10: // fall through
723 case vmIntrinsics::_dlog: // fall through
724 case vmIntrinsics::_dsin: // fall through
725 case vmIntrinsics::_dtan: // fall through
726 case vmIntrinsics::_dcos: {
727 assert(x->number_of_arguments() == 1, "wrong type");
728
729 address runtime_entry = NULL;
730 switch (x->id()) {
731 case vmIntrinsics::_dsin:
732 runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dsin);
733 break;
734 case vmIntrinsics::_dcos:
735 runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dcos);
736 break;
737 case vmIntrinsics::_dtan:
738 runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dtan);
739 break;
740 case vmIntrinsics::_dlog:
741 runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog);
742 break;
743 case vmIntrinsics::_dlog10:
744 runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog10);
745 break;
746 default:
747 ShouldNotReachHere();
748 }
749
750 LIR_Opr result = call_runtime(x->argument_at(0), runtime_entry, x->type(), NULL);
751 set_result(x, result);
752 }
753 }
754 }
755
756
757 void LIRGenerator::do_ArrayCopy(Intrinsic* x) {
758 assert(x->number_of_arguments() == 5, "wrong type");
759
760 // Make all state_for calls early since they can emit code
761 CodeEmitInfo* info = state_for(x, x->state());
762
763 // Note: spill caller save before setting the item
764 LIRItem src (x->argument_at(0), this);
765 LIRItem src_pos (x->argument_at(1), this);
766 LIRItem dst (x->argument_at(2), this);
767 LIRItem dst_pos (x->argument_at(3), this);
768 LIRItem length (x->argument_at(4), this);
769 // load all values in callee_save_registers, as this makes the
770 // parameter passing to the fast case simpler
771 src.load_item_force (rlock_callee_saved(T_OBJECT));
772 src_pos.load_item_force (rlock_callee_saved(T_INT));
773 dst.load_item_force (rlock_callee_saved(T_OBJECT));
774 dst_pos.load_item_force (rlock_callee_saved(T_INT));
775 length.load_item_force (rlock_callee_saved(T_INT));
776
777 int flags;
778 ciArrayKlass* expected_type;
779 arraycopy_helper(x, &flags, &expected_type);
780
781 __ arraycopy(src.result(), src_pos.result(), dst.result(), dst_pos.result(),
782 length.result(), rlock_callee_saved(T_INT),
783 expected_type, flags, info);
784 set_no_result(x);
785 }
786
787 // _i2l, _i2f, _i2d, _l2i, _l2f, _l2d, _f2i, _f2l, _f2d, _d2i, _d2l, _d2f
788 // _i2b, _i2c, _i2s
789 void LIRGenerator::do_Convert(Convert* x) {
790
791 switch (x->op()) {
792 case Bytecodes::_f2l:
793 case Bytecodes::_d2l:
794 case Bytecodes::_d2i:
795 case Bytecodes::_l2f:
796 case Bytecodes::_l2d: {
797
798 address entry;
799 switch (x->op()) {
800 case Bytecodes::_l2f:
801 entry = CAST_FROM_FN_PTR(address, SharedRuntime::l2f);
802 break;
803 case Bytecodes::_l2d:
804 entry = CAST_FROM_FN_PTR(address, SharedRuntime::l2d);
805 break;
806 case Bytecodes::_f2l:
807 entry = CAST_FROM_FN_PTR(address, SharedRuntime::f2l);
808 break;
809 case Bytecodes::_d2l:
810 entry = CAST_FROM_FN_PTR(address, SharedRuntime::d2l);
811 break;
812 case Bytecodes::_d2i:
813 entry = CAST_FROM_FN_PTR(address, SharedRuntime::d2i);
814 break;
815 default:
816 ShouldNotReachHere();
817 }
818 LIR_Opr result = call_runtime(x->value(), entry, x->type(), NULL);
819 set_result(x, result);
820 break;
821 }
822
823 case Bytecodes::_i2f:
824 case Bytecodes::_i2d: {
825 LIRItem value(x->value(), this);
826
827 LIR_Opr reg = rlock_result(x);
828 // To convert an int to double, we need to load the 32-bit int
829 // from memory into a single precision floating point register
830 // (even numbered). Then the sparc fitod instruction takes care
831 // of the conversion. This is a bit ugly, but is the best way to
832 // get the int value in a single precision floating point register
833 value.load_item();
834 LIR_Opr tmp = force_to_spill(value.result(), T_FLOAT);
835 __ convert(x->op(), tmp, reg);
836 break;
837 }
838 break;
839
840 case Bytecodes::_i2l:
841 case Bytecodes::_i2b:
842 case Bytecodes::_i2c:
843 case Bytecodes::_i2s:
844 case Bytecodes::_l2i:
845 case Bytecodes::_f2d:
846 case Bytecodes::_d2f: { // inline code
847 LIRItem value(x->value(), this);
848
849 value.load_item();
850 LIR_Opr reg = rlock_result(x);
851 __ convert(x->op(), value.result(), reg, false);
852 }
853 break;
854
855 case Bytecodes::_f2i: {
856 LIRItem value (x->value(), this);
857 value.set_destroys_register();
858 value.load_item();
859 LIR_Opr reg = rlock_result(x);
860 set_vreg_flag(reg, must_start_in_memory);
861 __ convert(x->op(), value.result(), reg, false);
862 }
863 break;
864
865 default: ShouldNotReachHere();
866 }
867 }
868
869
870 void LIRGenerator::do_NewInstance(NewInstance* x) {
871 // This instruction can be deoptimized in the slow path : use
872 // O0 as result register.
873 const LIR_Opr reg = result_register_for(x->type());
874
875 if (PrintNotLoaded && !x->klass()->is_loaded()) {
876 tty->print_cr(" ###class not loaded at new bci %d", x->bci());
877 }
878 CodeEmitInfo* info = state_for(x, x->state());
879 LIR_Opr tmp1 = FrameMap::G1_oop_opr;
880 LIR_Opr tmp2 = FrameMap::G3_oop_opr;
881 LIR_Opr tmp3 = FrameMap::G4_oop_opr;
882 LIR_Opr tmp4 = FrameMap::O1_oop_opr;
883 LIR_Opr klass_reg = FrameMap::G5_oop_opr;
884 new_instance(reg, x->klass(), tmp1, tmp2, tmp3, tmp4, klass_reg, info);
885 LIR_Opr result = rlock_result(x);
886 __ move(reg, result);
887 }
888
889
890 void LIRGenerator::do_NewTypeArray(NewTypeArray* x) {
891 // Evaluate state_for early since it may emit code
892 CodeEmitInfo* info = state_for(x, x->state());
893
894 LIRItem length(x->length(), this);
895 length.load_item();
896
897 LIR_Opr reg = result_register_for(x->type());
898 LIR_Opr tmp1 = FrameMap::G1_oop_opr;
899 LIR_Opr tmp2 = FrameMap::G3_oop_opr;
900 LIR_Opr tmp3 = FrameMap::G4_oop_opr;
901 LIR_Opr tmp4 = FrameMap::O1_oop_opr;
902 LIR_Opr klass_reg = FrameMap::G5_oop_opr;
903 LIR_Opr len = length.result();
904 BasicType elem_type = x->elt_type();
905
906 __ oop2reg(ciTypeArrayKlass::make(elem_type)->constant_encoding(), klass_reg);
907
908 CodeStub* slow_path = new NewTypeArrayStub(klass_reg, len, reg, info);
909 __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, elem_type, klass_reg, slow_path);
910
911 LIR_Opr result = rlock_result(x);
912 __ move(reg, result);
913 }
914
915
916 void LIRGenerator::do_NewObjectArray(NewObjectArray* x) {
917 // Evaluate state_for early since it may emit code.
918 CodeEmitInfo* info = state_for(x, x->state());
919 // in case of patching (i.e., object class is not yet loaded), we need to reexecute the instruction
920 // and therefore provide the state before the parameters have been consumed
921 CodeEmitInfo* patching_info = NULL;
922 if (!x->klass()->is_loaded() || PatchALot) {
923 patching_info = state_for(x, x->state_before());
924 }
925
926 LIRItem length(x->length(), this);
927 length.load_item();
928
929 const LIR_Opr reg = result_register_for(x->type());
930 LIR_Opr tmp1 = FrameMap::G1_oop_opr;
931 LIR_Opr tmp2 = FrameMap::G3_oop_opr;
932 LIR_Opr tmp3 = FrameMap::G4_oop_opr;
933 LIR_Opr tmp4 = FrameMap::O1_oop_opr;
934 LIR_Opr klass_reg = FrameMap::G5_oop_opr;
935 LIR_Opr len = length.result();
936
937 CodeStub* slow_path = new NewObjectArrayStub(klass_reg, len, reg, info);
938 ciObject* obj = (ciObject*) ciObjArrayKlass::make(x->klass());
939 if (obj == ciEnv::unloaded_ciobjarrayklass()) {
940 BAILOUT("encountered unloaded_ciobjarrayklass due to out of memory error");
941 }
942 jobject2reg_with_patching(klass_reg, obj, patching_info);
943 __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, T_OBJECT, klass_reg, slow_path);
944
945 LIR_Opr result = rlock_result(x);
946 __ move(reg, result);
947 }
948
949
950 void LIRGenerator::do_NewMultiArray(NewMultiArray* x) {
951 Values* dims = x->dims();
952 int i = dims->length();
953 LIRItemList* items = new LIRItemList(dims->length(), NULL);
954 while (i-- > 0) {
955 LIRItem* size = new LIRItem(dims->at(i), this);
956 items->at_put(i, size);
957 }
958
959 // Evaluate state_for early since it may emit code.
960 CodeEmitInfo* patching_info = NULL;
961 if (!x->klass()->is_loaded() || PatchALot) {
962 patching_info = state_for(x, x->state_before());
963
964 // cannot re-use same xhandlers for multiple CodeEmitInfos, so
965 // clone all handlers. This is handled transparently in other
966 // places by the CodeEmitInfo cloning logic but is handled
967 // specially here because a stub isn't being used.
968 x->set_exception_handlers(new XHandlers(x->exception_handlers()));
969 }
970 CodeEmitInfo* info = state_for(x, x->state());
971
972 i = dims->length();
973 while (i-- > 0) {
974 LIRItem* size = items->at(i);
975 size->load_item();
976 store_stack_parameter (size->result(),
977 in_ByteSize(STACK_BIAS +
978 frame::memory_parameter_word_sp_offset * wordSize +
979 i * sizeof(jint)));
980 }
981
982 // This instruction can be deoptimized in the slow path : use
983 // O0 as result register.
984 const LIR_Opr reg = result_register_for(x->type());
985 jobject2reg_with_patching(reg, x->klass(), patching_info);
986 LIR_Opr rank = FrameMap::O1_opr;
987 __ move(LIR_OprFact::intConst(x->rank()), rank);
988 LIR_Opr varargs = FrameMap::as_pointer_opr(O2);
989 int offset_from_sp = (frame::memory_parameter_word_sp_offset * wordSize) + STACK_BIAS;
990 __ add(FrameMap::SP_opr,
991 LIR_OprFact::intptrConst(offset_from_sp),
992 varargs);
993 LIR_OprList* args = new LIR_OprList(3);
994 args->append(reg);
995 args->append(rank);
996 args->append(varargs);
997 __ call_runtime(Runtime1::entry_for(Runtime1::new_multi_array_id),
998 LIR_OprFact::illegalOpr,
999 reg, args, info);
1000
1001 LIR_Opr result = rlock_result(x);
1002 __ move(reg, result);
1003 }
1004
1005
1006 void LIRGenerator::do_BlockBegin(BlockBegin* x) {
1007 }
1008
1009
1010 void LIRGenerator::do_CheckCast(CheckCast* x) {
1011 LIRItem obj(x->obj(), this);
1012 CodeEmitInfo* patching_info = NULL;
1013 if (!x->klass()->is_loaded() || (PatchALot && !x->is_incompatible_class_change_check())) {
1014 // must do this before locking the destination register as an oop register,
1015 // and before the obj is loaded (so x->obj()->item() is valid for creating a debug info location)
1016 patching_info = state_for(x, x->state_before());
1017 }
1018 obj.load_item();
1019 LIR_Opr out_reg = rlock_result(x);
1020 CodeStub* stub;
1021 CodeEmitInfo* info_for_exception = state_for(x, x->state()->copy_locks());
1022
1023 if (x->is_incompatible_class_change_check()) {
1024 assert(patching_info == NULL, "can't patch this");
1025 stub = new SimpleExceptionStub(Runtime1::throw_incompatible_class_change_error_id, LIR_OprFact::illegalOpr, info_for_exception);
1026 } else {
1027 stub = new SimpleExceptionStub(Runtime1::throw_class_cast_exception_id, obj.result(), info_for_exception);
1028 }
1029 LIR_Opr tmp1 = FrameMap::G1_oop_opr;
1030 LIR_Opr tmp2 = FrameMap::G3_oop_opr;
1031 LIR_Opr tmp3 = FrameMap::G4_oop_opr;
1032 __ checkcast(out_reg, obj.result(), x->klass(), tmp1, tmp2, tmp3,
1033 x->direct_compare(), info_for_exception, patching_info, stub,
1034 x->profiled_method(), x->profiled_bci());
1035 }
1036
1037
1038 void LIRGenerator::do_InstanceOf(InstanceOf* x) {
1039 LIRItem obj(x->obj(), this);
1040 CodeEmitInfo* patching_info = NULL;
1041 if (!x->klass()->is_loaded() || PatchALot) {
1042 patching_info = state_for(x, x->state_before());
1043 }
1044 // ensure the result register is not the input register because the result is initialized before the patching safepoint
1045 obj.load_item();
1046 LIR_Opr out_reg = rlock_result(x);
1047 LIR_Opr tmp1 = FrameMap::G1_oop_opr;
1048 LIR_Opr tmp2 = FrameMap::G3_oop_opr;
1049 LIR_Opr tmp3 = FrameMap::G4_oop_opr;
1050 __ instanceof(out_reg, obj.result(), x->klass(), tmp1, tmp2, tmp3,
1051 x->direct_compare(), patching_info,
1052 x->profiled_method(), x->profiled_bci());
1053 }
1054
1055
1056 void LIRGenerator::do_If(If* x) {
1057 assert(x->number_of_sux() == 2, "inconsistency");
1058 ValueTag tag = x->x()->type()->tag();
1059 LIRItem xitem(x->x(), this);
1060 LIRItem yitem(x->y(), this);
1061 LIRItem* xin = &xitem;
1062 LIRItem* yin = &yitem;
1063 If::Condition cond = x->cond();
1064
1065 if (tag == longTag) {
1066 // for longs, only conditions "eql", "neq", "lss", "geq" are valid;
1067 // mirror for other conditions
1068 if (cond == If::gtr || cond == If::leq) {
1069 // swap inputs
1070 cond = Instruction::mirror(cond);
1071 xin = &yitem;
1072 yin = &xitem;
1073 }
1074 xin->set_destroys_register();
1075 }
1076
1077 LIR_Opr left = LIR_OprFact::illegalOpr;
1078 LIR_Opr right = LIR_OprFact::illegalOpr;
1079
1080 xin->load_item();
1081 left = xin->result();
1082
1083 if (is_simm13(yin->result())) {
1084 // inline int constants which are small enough to be immediate operands
1085 right = LIR_OprFact::value_type(yin->value()->type());
1086 } else if (tag == longTag && yin->is_constant() && yin->get_jlong_constant() == 0 &&
1087 (cond == If::eql || cond == If::neq)) {
1088 // inline long zero
1089 right = LIR_OprFact::value_type(yin->value()->type());
1090 } else if (tag == objectTag && yin->is_constant() && (yin->get_jobject_constant()->is_null_object())) {
1091 right = LIR_OprFact::value_type(yin->value()->type());
1092 } else {
1093 yin->load_item();
1094 right = yin->result();
1095 }
1096 set_no_result(x);
1097
1098 // add safepoint before generating condition code so it can be recomputed
1099 if (x->is_safepoint()) {
1100 // increment backedge counter if needed
1101 increment_backedge_counter(state_for(x, x->state_before()), x->profiled_bci());
1102 __ safepoint(new_register(T_INT), state_for(x, x->state_before()));
1103 }
1104
1105 __ cmp(lir_cond(cond), left, right);
1106 // Generate branch profiling. Profiling code doesn't kill flags.
1107 profile_branch(x, cond);
1108 move_to_phi(x->state());
1109 if (x->x()->type()->is_float_kind()) {
1110 __ branch(lir_cond(cond), right->type(), x->tsux(), x->usux());
1111 } else {
1112 __ branch(lir_cond(cond), right->type(), x->tsux());
1113 }
1114 assert(x->default_sux() == x->fsux(), "wrong destination above");
1115 __ jump(x->default_sux());
1116 }
1117
1118
1119 LIR_Opr LIRGenerator::getThreadPointer() {
1120 return FrameMap::as_pointer_opr(G2);
1121 }
1122
1123
1124 void LIRGenerator::trace_block_entry(BlockBegin* block) {
1125 __ move(LIR_OprFact::intConst(block->block_id()), FrameMap::O0_opr);
1126 LIR_OprList* args = new LIR_OprList(1);
1127 args->append(FrameMap::O0_opr);
1128 address func = CAST_FROM_FN_PTR(address, Runtime1::trace_block_entry);
1129 __ call_runtime_leaf(func, rlock_callee_saved(T_INT), LIR_OprFact::illegalOpr, args);
1130 }
1131
1132
1133 void LIRGenerator::volatile_field_store(LIR_Opr value, LIR_Address* address,
1134 CodeEmitInfo* info) {
1135 #ifdef _LP64
1136 __ store(value, address, info);
1137 #else
1138 __ volatile_store_mem_reg(value, address, info);
1139 #endif
1140 }
1141
1142 void LIRGenerator::volatile_field_load(LIR_Address* address, LIR_Opr result,
1143 CodeEmitInfo* info) {
1144 #ifdef _LP64
1145 __ load(address, result, info);
1146 #else
1147 __ volatile_load_mem_reg(address, result, info);
1148 #endif
1149 }
1150
1151
1152 void LIRGenerator::put_Object_unsafe(LIR_Opr src, LIR_Opr offset, LIR_Opr data,
1153 BasicType type, bool is_volatile) {
1154 LIR_Opr base_op = src;
1155 LIR_Opr index_op = offset;
1156
1157 bool is_obj = (type == T_ARRAY || type == T_OBJECT);
1158 #ifndef _LP64
1159 if (is_volatile && type == T_LONG) {
1160 __ volatile_store_unsafe_reg(data, src, offset, type, NULL, lir_patch_none);
1161 } else
1162 #endif
1163 {
1164 if (type == T_BOOLEAN) {
1165 type = T_BYTE;
1166 }
1167 LIR_Address* addr;
1168 if (type == T_ARRAY || type == T_OBJECT) {
1169 LIR_Opr tmp = new_pointer_register();
1170 __ add(base_op, index_op, tmp);
1171 addr = new LIR_Address(tmp, type);
1172 } else {
1173 addr = new LIR_Address(base_op, index_op, type);
1174 }
1175
1176 if (is_obj) {
1177 pre_barrier(LIR_OprFact::address(addr), false, NULL);
1178 // _bs->c1_write_barrier_pre(this, LIR_OprFact::address(addr));
1179 }
1180 __ move(data, addr);
1181 if (is_obj) {
1182 // This address is precise
1183 post_barrier(LIR_OprFact::address(addr), data);
1184 }
1185 }
1186 }
1187
1188
1189 void LIRGenerator::get_Object_unsafe(LIR_Opr dst, LIR_Opr src, LIR_Opr offset,
1190 BasicType type, bool is_volatile) {
1191 #ifndef _LP64
1192 if (is_volatile && type == T_LONG) {
1193 __ volatile_load_unsafe_reg(src, offset, dst, type, NULL, lir_patch_none);
1194 } else
1195 #endif
1196 {
1197 LIR_Address* addr = new LIR_Address(src, offset, type);
1198 __ load(addr, dst);
1199 }
1200 }