1 /* 2 * Copyright (c) 2005, 2012, 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_sparc.inline.hpp" 39 40 #ifdef ASSERT 41 #define __ gen()->lir(__FILE__, __LINE__)-> 42 #else 43 #define __ gen()->lir()-> 44 #endif 45 46 void LIRItem::load_byte_item() { 47 // byte loads use same registers as other loads 48 load_item(); 49 } 50 51 52 void LIRItem::load_nonconstant() { 53 LIR_Opr r = value()->operand(); 54 if (_gen->can_inline_as_constant(value())) { 55 if (!r->is_constant()) { 56 r = LIR_OprFact::value_type(value()->type()); 57 } 58 _result = r; 59 } else { 60 load_item(); 61 } 62 } 63 64 65 //-------------------------------------------------------------- 66 // LIRGenerator 67 //-------------------------------------------------------------- 68 69 LIR_Opr LIRGenerator::exceptionOopOpr() { return FrameMap::Oexception_opr; } 70 LIR_Opr LIRGenerator::exceptionPcOpr() { return FrameMap::Oissuing_pc_opr; } 71 LIR_Opr LIRGenerator::syncTempOpr() { return new_register(T_OBJECT); } 72 LIR_Opr LIRGenerator::getThreadTemp() { return rlock_callee_saved(T_INT); } 73 74 LIR_Opr LIRGenerator::result_register_for(ValueType* type, bool callee) { 75 LIR_Opr opr; 76 switch (type->tag()) { 77 case intTag: opr = callee ? FrameMap::I0_opr : FrameMap::O0_opr; break; 78 case objectTag: opr = callee ? FrameMap::I0_oop_opr : FrameMap::O0_oop_opr; break; 79 case longTag: opr = callee ? FrameMap::in_long_opr : FrameMap::out_long_opr; break; 80 case floatTag: opr = FrameMap::F0_opr; break; 81 case doubleTag: opr = FrameMap::F0_double_opr; break; 82 83 case addressTag: 84 default: ShouldNotReachHere(); return LIR_OprFact::illegalOpr; 85 } 86 87 assert(opr->type_field() == as_OprType(as_BasicType(type)), "type mismatch"); 88 return opr; 89 } 90 91 LIR_Opr LIRGenerator::rlock_callee_saved(BasicType type) { 92 LIR_Opr reg = new_register(type); 93 set_vreg_flag(reg, callee_saved); 94 return reg; 95 } 96 97 98 LIR_Opr LIRGenerator::rlock_byte(BasicType type) { 99 return new_register(T_INT); 100 } 101 102 103 104 105 106 //--------- loading items into registers -------------------------------- 107 108 // SPARC cannot inline all constants 109 bool LIRGenerator::can_store_as_constant(Value v, BasicType type) const { 110 if (v->type()->as_IntConstant() != NULL) { 111 return v->type()->as_IntConstant()->value() == 0; 112 } else if (v->type()->as_LongConstant() != NULL) { 113 return v->type()->as_LongConstant()->value() == 0L; 114 } else if (v->type()->as_ObjectConstant() != NULL) { 115 return v->type()->as_ObjectConstant()->value()->is_null_object(); 116 } else { 117 return false; 118 } 119 } 120 121 122 // only simm13 constants can be inlined 123 bool LIRGenerator:: can_inline_as_constant(Value i) const { 124 if (i->type()->as_IntConstant() != NULL) { 125 return Assembler::is_simm13(i->type()->as_IntConstant()->value()); 126 } else { 127 return can_store_as_constant(i, as_BasicType(i->type())); 128 } 129 } 130 131 132 bool LIRGenerator:: can_inline_as_constant(LIR_Const* c) const { 133 if (c->type() == T_INT) { 134 return Assembler::is_simm13(c->as_jint()); 135 } 136 return false; 137 } 138 139 140 LIR_Opr LIRGenerator::safepoint_poll_register() { 141 return new_register(T_INT); 142 } 143 144 145 146 LIR_Address* LIRGenerator::generate_address(LIR_Opr base, LIR_Opr index, 147 int shift, int disp, BasicType type) { 148 assert(base->is_register(), "must be"); 149 150 // accumulate fixed displacements 151 if (index->is_constant()) { 152 disp += index->as_constant_ptr()->as_jint() << shift; 153 index = LIR_OprFact::illegalOpr; 154 } 155 156 if (index->is_register()) { 157 // apply the shift and accumulate the displacement 158 if (shift > 0) { 159 LIR_Opr tmp = new_pointer_register(); 160 __ shift_left(index, shift, tmp); 161 index = tmp; 162 } 163 if (disp != 0) { 164 LIR_Opr tmp = new_pointer_register(); 165 if (Assembler::is_simm13(disp)) { 166 __ add(tmp, LIR_OprFact::intptrConst(disp), tmp); 167 index = tmp; 168 } else { 169 __ move(LIR_OprFact::intptrConst(disp), tmp); 170 __ add(tmp, index, tmp); 171 index = tmp; 172 } 173 disp = 0; 174 } 175 } else if (disp != 0 && !Assembler::is_simm13(disp)) { 176 // index is illegal so replace it with the displacement loaded into a register 177 index = new_pointer_register(); 178 __ move(LIR_OprFact::intptrConst(disp), index); 179 disp = 0; 180 } 181 182 // at this point we either have base + index or base + displacement 183 if (disp == 0) { 184 return new LIR_Address(base, index, type); 185 } else { 186 assert(Assembler::is_simm13(disp), "must be"); 187 return new LIR_Address(base, disp, type); 188 } 189 } 190 191 192 LIR_Address* LIRGenerator::emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr, 193 BasicType type, bool needs_card_mark) { 194 int elem_size = type2aelembytes(type); 195 int shift = exact_log2(elem_size); 196 197 LIR_Opr base_opr; 198 int offset = arrayOopDesc::base_offset_in_bytes(type); 199 200 if (index_opr->is_constant()) { 201 int i = index_opr->as_constant_ptr()->as_jint(); 202 int array_offset = i * elem_size; 203 if (Assembler::is_simm13(array_offset + offset)) { 204 base_opr = array_opr; 205 offset = array_offset + offset; 206 } else { 207 base_opr = new_pointer_register(); 208 if (Assembler::is_simm13(array_offset)) { 209 __ add(array_opr, LIR_OprFact::intptrConst(array_offset), base_opr); 210 } else { 211 __ move(LIR_OprFact::intptrConst(array_offset), base_opr); 212 __ add(base_opr, array_opr, base_opr); 213 } 214 } 215 } else { 216 #ifdef _LP64 217 if (index_opr->type() == T_INT) { 218 LIR_Opr tmp = new_register(T_LONG); 219 __ convert(Bytecodes::_i2l, index_opr, tmp); 220 index_opr = tmp; 221 } 222 #endif 223 224 base_opr = new_pointer_register(); 225 assert (index_opr->is_register(), "Must be register"); 226 if (shift > 0) { 227 __ shift_left(index_opr, shift, base_opr); 228 __ add(base_opr, array_opr, base_opr); 229 } else { 230 __ add(index_opr, array_opr, base_opr); 231 } 232 } 233 if (needs_card_mark) { 234 LIR_Opr ptr = new_pointer_register(); 235 __ add(base_opr, LIR_OprFact::intptrConst(offset), ptr); 236 return new LIR_Address(ptr, type); 237 } else { 238 return new LIR_Address(base_opr, offset, type); 239 } 240 } 241 242 LIR_Opr LIRGenerator::load_immediate(int x, BasicType type) { 243 LIR_Opr r; 244 if (type == T_LONG) { 245 r = LIR_OprFact::longConst(x); 246 } else if (type == T_INT) { 247 r = LIR_OprFact::intConst(x); 248 } else { 249 ShouldNotReachHere(); 250 } 251 if (!Assembler::is_simm13(x)) { 252 LIR_Opr tmp = new_register(type); 253 __ move(r, tmp); 254 return tmp; 255 } 256 return r; 257 } 258 259 void LIRGenerator::increment_counter(address counter, BasicType type, int step) { 260 LIR_Opr pointer = new_pointer_register(); 261 __ move(LIR_OprFact::intptrConst(counter), pointer); 262 LIR_Address* addr = new LIR_Address(pointer, type); 263 increment_counter(addr, step); 264 } 265 266 void LIRGenerator::increment_counter(LIR_Address* addr, int step) { 267 LIR_Opr temp = new_register(addr->type()); 268 __ move(addr, temp); 269 __ add(temp, load_immediate(step, addr->type()), temp); 270 __ move(temp, addr); 271 } 272 273 void LIRGenerator::cmp_mem_int(LIR_Condition condition, LIR_Opr base, int disp, int c, CodeEmitInfo* info) { 274 LIR_Opr o7opr = FrameMap::O7_opr; 275 __ load(new LIR_Address(base, disp, T_INT), o7opr, info); 276 __ cmp(condition, o7opr, c); 277 } 278 279 280 void LIRGenerator::cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, int disp, BasicType type, CodeEmitInfo* info) { 281 LIR_Opr o7opr = FrameMap::O7_opr; 282 __ load(new LIR_Address(base, disp, type), o7opr, info); 283 __ cmp(condition, reg, o7opr); 284 } 285 286 287 void LIRGenerator::cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, LIR_Opr disp, BasicType type, CodeEmitInfo* info) { 288 LIR_Opr o7opr = FrameMap::O7_opr; 289 __ load(new LIR_Address(base, disp, type), o7opr, info); 290 __ cmp(condition, reg, o7opr); 291 } 292 293 294 bool LIRGenerator::strength_reduce_multiply(LIR_Opr left, int c, LIR_Opr result, LIR_Opr tmp) { 295 assert(left != result, "should be different registers"); 296 if (is_power_of_2(c + 1)) { 297 __ shift_left(left, log2_intptr(c + 1), result); 298 __ sub(result, left, result); 299 return true; 300 } else if (is_power_of_2(c - 1)) { 301 __ shift_left(left, log2_intptr(c - 1), result); 302 __ add(result, left, result); 303 return true; 304 } 305 return false; 306 } 307 308 309 void LIRGenerator::store_stack_parameter (LIR_Opr item, ByteSize offset_from_sp) { 310 BasicType t = item->type(); 311 LIR_Opr sp_opr = FrameMap::SP_opr; 312 if ((t == T_LONG || t == T_DOUBLE) && 313 ((in_bytes(offset_from_sp) - STACK_BIAS) % 8 != 0)) { 314 __ unaligned_move(item, new LIR_Address(sp_opr, in_bytes(offset_from_sp), t)); 315 } else { 316 __ move(item, new LIR_Address(sp_opr, in_bytes(offset_from_sp), t)); 317 } 318 } 319 320 //---------------------------------------------------------------------- 321 // visitor functions 322 //---------------------------------------------------------------------- 323 324 325 void LIRGenerator::do_StoreIndexed(StoreIndexed* x) { 326 assert(x->is_pinned(),""); 327 bool needs_range_check = x->compute_needs_range_check(); 328 bool use_length = x->length() != NULL; 329 bool obj_store = x->elt_type() == T_ARRAY || x->elt_type() == T_OBJECT; 330 bool needs_store_check = obj_store && (x->value()->as_Constant() == NULL || 331 !get_jobject_constant(x->value())->is_null_object() || 332 x->should_profile()); 333 334 LIRItem array(x->array(), this); 335 LIRItem index(x->index(), this); 336 LIRItem value(x->value(), this); 337 LIRItem length(this); 338 339 array.load_item(); 340 index.load_nonconstant(); 341 342 if (use_length && needs_range_check) { 343 length.set_instruction(x->length()); 344 length.load_item(); 345 } 346 if (needs_store_check) { 347 value.load_item(); 348 } else { 349 value.load_for_store(x->elt_type()); 350 } 351 352 set_no_result(x); 353 354 // the CodeEmitInfo must be duplicated for each different 355 // LIR-instruction because spilling can occur anywhere between two 356 // instructions and so the debug information must be different 357 CodeEmitInfo* range_check_info = state_for(x); 358 CodeEmitInfo* null_check_info = NULL; 359 if (x->needs_null_check()) { 360 null_check_info = new CodeEmitInfo(range_check_info); 361 } 362 363 // emit array address setup early so it schedules better 364 LIR_Address* array_addr = emit_array_address(array.result(), index.result(), x->elt_type(), obj_store); 365 366 if (GenerateRangeChecks && needs_range_check) { 367 if (use_length) { 368 __ cmp(lir_cond_belowEqual, length.result(), index.result()); 369 __ branch(lir_cond_belowEqual, T_INT, new RangeCheckStub(range_check_info, index.result())); 370 } else { 371 array_range_check(array.result(), index.result(), null_check_info, range_check_info); 372 // range_check also does the null check 373 null_check_info = NULL; 374 } 375 } 376 377 if (GenerateArrayStoreCheck && needs_store_check) { 378 LIR_Opr tmp1 = FrameMap::G1_opr; 379 LIR_Opr tmp2 = FrameMap::G3_opr; 380 LIR_Opr tmp3 = FrameMap::G5_opr; 381 382 CodeEmitInfo* store_check_info = new CodeEmitInfo(range_check_info); 383 __ store_check(value.result(), array.result(), tmp1, tmp2, tmp3, store_check_info, x->profiled_method(), x->profiled_bci()); 384 } 385 386 if (obj_store) { 387 // Needs GC write barriers. 388 pre_barrier(LIR_OprFact::address(array_addr), LIR_OprFact::illegalOpr /* pre_val */, 389 true /* do_load */, false /* patch */, NULL); 390 } 391 __ move(value.result(), array_addr, null_check_info); 392 if (obj_store) { 393 // Precise card mark 394 post_barrier(LIR_OprFact::address(array_addr), value.result()); 395 } 396 } 397 398 399 void LIRGenerator::do_MonitorEnter(MonitorEnter* x) { 400 assert(x->is_pinned(),""); 401 LIRItem obj(x->obj(), this); 402 obj.load_item(); 403 404 set_no_result(x); 405 406 LIR_Opr lock = FrameMap::G1_opr; 407 LIR_Opr scratch = FrameMap::G3_opr; 408 LIR_Opr hdr = FrameMap::G4_opr; 409 410 CodeEmitInfo* info_for_exception = NULL; 411 if (x->needs_null_check()) { 412 info_for_exception = state_for(x); 413 } 414 415 // this CodeEmitInfo must not have the xhandlers because here the 416 // object is already locked (xhandlers expects object to be unlocked) 417 CodeEmitInfo* info = state_for(x, x->state(), true); 418 monitor_enter(obj.result(), lock, hdr, scratch, x->monitor_no(), info_for_exception, info); 419 } 420 421 422 void LIRGenerator::do_MonitorExit(MonitorExit* x) { 423 assert(x->is_pinned(),""); 424 LIRItem obj(x->obj(), this); 425 obj.dont_load_item(); 426 427 set_no_result(x); 428 LIR_Opr lock = FrameMap::G1_opr; 429 LIR_Opr hdr = FrameMap::G3_opr; 430 LIR_Opr obj_temp = FrameMap::G4_opr; 431 monitor_exit(obj_temp, lock, hdr, LIR_OprFact::illegalOpr, x->monitor_no()); 432 } 433 434 435 // _ineg, _lneg, _fneg, _dneg 436 void LIRGenerator::do_NegateOp(NegateOp* x) { 437 LIRItem value(x->x(), this); 438 value.load_item(); 439 LIR_Opr reg = rlock_result(x); 440 __ negate(value.result(), reg); 441 } 442 443 444 445 // for _fadd, _fmul, _fsub, _fdiv, _frem 446 // _dadd, _dmul, _dsub, _ddiv, _drem 447 void LIRGenerator::do_ArithmeticOp_FPU(ArithmeticOp* x) { 448 switch (x->op()) { 449 case Bytecodes::_fadd: 450 case Bytecodes::_fmul: 451 case Bytecodes::_fsub: 452 case Bytecodes::_fdiv: 453 case Bytecodes::_dadd: 454 case Bytecodes::_dmul: 455 case Bytecodes::_dsub: 456 case Bytecodes::_ddiv: { 457 LIRItem left(x->x(), this); 458 LIRItem right(x->y(), this); 459 left.load_item(); 460 right.load_item(); 461 rlock_result(x); 462 arithmetic_op_fpu(x->op(), x->operand(), left.result(), right.result(), x->is_strictfp()); 463 } 464 break; 465 466 case Bytecodes::_frem: 467 case Bytecodes::_drem: { 468 address entry; 469 switch (x->op()) { 470 case Bytecodes::_frem: 471 entry = CAST_FROM_FN_PTR(address, SharedRuntime::frem); 472 break; 473 case Bytecodes::_drem: 474 entry = CAST_FROM_FN_PTR(address, SharedRuntime::drem); 475 break; 476 default: 477 ShouldNotReachHere(); 478 } 479 LIR_Opr result = call_runtime(x->x(), x->y(), entry, x->type(), NULL); 480 set_result(x, result); 481 } 482 break; 483 484 default: ShouldNotReachHere(); 485 } 486 } 487 488 489 // for _ladd, _lmul, _lsub, _ldiv, _lrem 490 void LIRGenerator::do_ArithmeticOp_Long(ArithmeticOp* x) { 491 switch (x->op()) { 492 case Bytecodes::_lrem: 493 case Bytecodes::_lmul: 494 case Bytecodes::_ldiv: { 495 496 if (x->op() == Bytecodes::_ldiv || x->op() == Bytecodes::_lrem) { 497 LIRItem right(x->y(), this); 498 right.load_item(); 499 500 CodeEmitInfo* info = state_for(x); 501 LIR_Opr item = right.result(); 502 assert(item->is_register(), "must be"); 503 __ cmp(lir_cond_equal, item, LIR_OprFact::longConst(0)); 504 __ branch(lir_cond_equal, T_LONG, new DivByZeroStub(info)); 505 } 506 507 address entry; 508 switch (x->op()) { 509 case Bytecodes::_lrem: 510 entry = CAST_FROM_FN_PTR(address, SharedRuntime::lrem); 511 break; // check if dividend is 0 is done elsewhere 512 case Bytecodes::_ldiv: 513 entry = CAST_FROM_FN_PTR(address, SharedRuntime::ldiv); 514 break; // check if dividend is 0 is done elsewhere 515 case Bytecodes::_lmul: 516 entry = CAST_FROM_FN_PTR(address, SharedRuntime::lmul); 517 break; 518 default: 519 ShouldNotReachHere(); 520 } 521 522 // order of arguments to runtime call is reversed. 523 LIR_Opr result = call_runtime(x->y(), x->x(), entry, x->type(), NULL); 524 set_result(x, result); 525 break; 526 } 527 case Bytecodes::_ladd: 528 case Bytecodes::_lsub: { 529 LIRItem left(x->x(), this); 530 LIRItem right(x->y(), this); 531 left.load_item(); 532 right.load_item(); 533 rlock_result(x); 534 535 arithmetic_op_long(x->op(), x->operand(), left.result(), right.result(), NULL); 536 break; 537 } 538 default: ShouldNotReachHere(); 539 } 540 } 541 542 543 // Returns if item is an int constant that can be represented by a simm13 544 static bool is_simm13(LIR_Opr item) { 545 if (item->is_constant() && item->type() == T_INT) { 546 return Assembler::is_simm13(item->as_constant_ptr()->as_jint()); 547 } else { 548 return false; 549 } 550 } 551 552 553 // for: _iadd, _imul, _isub, _idiv, _irem 554 void LIRGenerator::do_ArithmeticOp_Int(ArithmeticOp* x) { 555 bool is_div_rem = x->op() == Bytecodes::_idiv || x->op() == Bytecodes::_irem; 556 LIRItem left(x->x(), this); 557 LIRItem right(x->y(), this); 558 // missing test if instr is commutative and if we should swap 559 right.load_nonconstant(); 560 assert(right.is_constant() || right.is_register(), "wrong state of right"); 561 left.load_item(); 562 rlock_result(x); 563 if (is_div_rem) { 564 CodeEmitInfo* info = state_for(x); 565 LIR_Opr tmp = FrameMap::G1_opr; 566 if (x->op() == Bytecodes::_irem) { 567 __ irem(left.result(), right.result(), x->operand(), tmp, info); 568 } else if (x->op() == Bytecodes::_idiv) { 569 __ idiv(left.result(), right.result(), x->operand(), tmp, info); 570 } 571 } else { 572 arithmetic_op_int(x->op(), x->operand(), left.result(), right.result(), FrameMap::G1_opr); 573 } 574 } 575 576 577 void LIRGenerator::do_ArithmeticOp(ArithmeticOp* x) { 578 ValueTag tag = x->type()->tag(); 579 assert(x->x()->type()->tag() == tag && x->y()->type()->tag() == tag, "wrong parameters"); 580 switch (tag) { 581 case floatTag: 582 case doubleTag: do_ArithmeticOp_FPU(x); return; 583 case longTag: do_ArithmeticOp_Long(x); return; 584 case intTag: do_ArithmeticOp_Int(x); return; 585 } 586 ShouldNotReachHere(); 587 } 588 589 590 // _ishl, _lshl, _ishr, _lshr, _iushr, _lushr 591 void LIRGenerator::do_ShiftOp(ShiftOp* x) { 592 LIRItem value(x->x(), this); 593 LIRItem count(x->y(), this); 594 // Long shift destroys count register 595 if (value.type()->is_long()) { 596 count.set_destroys_register(); 597 } 598 value.load_item(); 599 // the old backend doesn't support this 600 if (count.is_constant() && count.type()->as_IntConstant() != NULL && value.type()->is_int()) { 601 jint c = count.get_jint_constant() & 0x1f; 602 assert(c >= 0 && c < 32, "should be small"); 603 count.dont_load_item(); 604 } else { 605 count.load_item(); 606 } 607 LIR_Opr reg = rlock_result(x); 608 shift_op(x->op(), reg, value.result(), count.result(), LIR_OprFact::illegalOpr); 609 } 610 611 612 // _iand, _land, _ior, _lor, _ixor, _lxor 613 void LIRGenerator::do_LogicOp(LogicOp* x) { 614 LIRItem left(x->x(), this); 615 LIRItem right(x->y(), this); 616 617 left.load_item(); 618 right.load_nonconstant(); 619 LIR_Opr reg = rlock_result(x); 620 621 logic_op(x->op(), reg, left.result(), right.result()); 622 } 623 624 625 626 // _lcmp, _fcmpl, _fcmpg, _dcmpl, _dcmpg 627 void LIRGenerator::do_CompareOp(CompareOp* x) { 628 LIRItem left(x->x(), this); 629 LIRItem right(x->y(), this); 630 left.load_item(); 631 right.load_item(); 632 LIR_Opr reg = rlock_result(x); 633 if (x->x()->type()->is_float_kind()) { 634 Bytecodes::Code code = x->op(); 635 __ fcmp2int(left.result(), right.result(), reg, (code == Bytecodes::_fcmpl || code == Bytecodes::_dcmpl)); 636 } else if (x->x()->type()->tag() == longTag) { 637 __ lcmp2int(left.result(), right.result(), reg); 638 } else { 639 Unimplemented(); 640 } 641 } 642 643 644 void LIRGenerator::do_CompareAndSwap(Intrinsic* x, ValueType* type) { 645 assert(x->number_of_arguments() == 4, "wrong type"); 646 LIRItem obj (x->argument_at(0), this); // object 647 LIRItem offset(x->argument_at(1), this); // offset of field 648 LIRItem cmp (x->argument_at(2), this); // value to compare with field 649 LIRItem val (x->argument_at(3), this); // replace field with val if matches cmp 650 651 // Use temps to avoid kills 652 LIR_Opr t1 = FrameMap::G1_opr; 653 LIR_Opr t2 = FrameMap::G3_opr; 654 LIR_Opr addr = new_pointer_register(); 655 656 // get address of field 657 obj.load_item(); 658 offset.load_item(); 659 cmp.load_item(); 660 val.load_item(); 661 662 __ add(obj.result(), offset.result(), addr); 663 664 if (type == objectType) { // Write-barrier needed for Object fields. 665 pre_barrier(addr, LIR_OprFact::illegalOpr /* pre_val */, 666 true /* do_load */, false /* patch */, NULL); 667 } 668 669 if (type == objectType) 670 __ cas_obj(addr, cmp.result(), val.result(), t1, t2); 671 else if (type == intType) 672 __ cas_int(addr, cmp.result(), val.result(), t1, t2); 673 else if (type == longType) 674 __ cas_long(addr, cmp.result(), val.result(), t1, t2); 675 else { 676 ShouldNotReachHere(); 677 } 678 // generate conditional move of boolean result 679 LIR_Opr result = rlock_result(x); 680 __ cmove(lir_cond_equal, LIR_OprFact::intConst(1), LIR_OprFact::intConst(0), 681 result, as_BasicType(type)); 682 if (type == objectType) { // Write-barrier needed for Object fields. 683 // Precise card mark since could either be object or array 684 post_barrier(addr, val.result()); 685 } 686 } 687 688 689 void LIRGenerator::do_MathIntrinsic(Intrinsic* x) { 690 switch (x->id()) { 691 case vmIntrinsics::_dabs: 692 case vmIntrinsics::_dsqrt: { 693 assert(x->number_of_arguments() == 1, "wrong type"); 694 LIRItem value(x->argument_at(0), this); 695 value.load_item(); 696 LIR_Opr dst = rlock_result(x); 697 698 switch (x->id()) { 699 case vmIntrinsics::_dsqrt: { 700 __ sqrt(value.result(), dst, LIR_OprFact::illegalOpr); 701 break; 702 } 703 case vmIntrinsics::_dabs: { 704 __ abs(value.result(), dst, LIR_OprFact::illegalOpr); 705 break; 706 } 707 } 708 break; 709 } 710 case vmIntrinsics::_dlog10: // fall through 711 case vmIntrinsics::_dlog: // fall through 712 case vmIntrinsics::_dsin: // fall through 713 case vmIntrinsics::_dtan: // fall through 714 case vmIntrinsics::_dcos: // fall through 715 case vmIntrinsics::_dexp: { 716 assert(x->number_of_arguments() == 1, "wrong type"); 717 718 address runtime_entry = NULL; 719 switch (x->id()) { 720 case vmIntrinsics::_dsin: 721 runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dsin); 722 break; 723 case vmIntrinsics::_dcos: 724 runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dcos); 725 break; 726 case vmIntrinsics::_dtan: 727 runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dtan); 728 break; 729 case vmIntrinsics::_dlog: 730 runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog); 731 break; 732 case vmIntrinsics::_dlog10: 733 runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog10); 734 break; 735 case vmIntrinsics::_dexp: 736 runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dexp); 737 break; 738 default: 739 ShouldNotReachHere(); 740 } 741 742 LIR_Opr result = call_runtime(x->argument_at(0), runtime_entry, x->type(), NULL); 743 set_result(x, result); 744 break; 745 } 746 case vmIntrinsics::_dpow: { 747 assert(x->number_of_arguments() == 2, "wrong type"); 748 address runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dpow); 749 LIR_Opr result = call_runtime(x->argument_at(0), x->argument_at(1), runtime_entry, x->type(), NULL); 750 set_result(x, result); 751 break; 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 #ifndef PRODUCT 875 if (PrintNotLoaded && !x->klass()->is_loaded()) { 876 tty->print_cr(" ###class not loaded at new bci %d", x->printable_bci()); 877 } 878 #endif 879 CodeEmitInfo* info = state_for(x, x->state()); 880 LIR_Opr tmp1 = FrameMap::G1_oop_opr; 881 LIR_Opr tmp2 = FrameMap::G3_oop_opr; 882 LIR_Opr tmp3 = FrameMap::G4_oop_opr; 883 LIR_Opr tmp4 = FrameMap::O1_oop_opr; 884 LIR_Opr klass_reg = FrameMap::G5_metadata_opr; 885 new_instance(reg, x->klass(), tmp1, tmp2, tmp3, tmp4, klass_reg, info); 886 LIR_Opr result = rlock_result(x); 887 __ move(reg, result); 888 } 889 890 891 void LIRGenerator::do_NewTypeArray(NewTypeArray* x) { 892 // Evaluate state_for early since it may emit code 893 CodeEmitInfo* info = state_for(x, x->state()); 894 895 LIRItem length(x->length(), this); 896 length.load_item(); 897 898 LIR_Opr reg = result_register_for(x->type()); 899 LIR_Opr tmp1 = FrameMap::G1_oop_opr; 900 LIR_Opr tmp2 = FrameMap::G3_oop_opr; 901 LIR_Opr tmp3 = FrameMap::G4_oop_opr; 902 LIR_Opr tmp4 = FrameMap::O1_oop_opr; 903 LIR_Opr klass_reg = FrameMap::G5_metadata_opr; 904 LIR_Opr len = length.result(); 905 BasicType elem_type = x->elt_type(); 906 907 __ metadata2reg(ciTypeArrayKlass::make(elem_type)->constant_encoding(), klass_reg); 908 909 CodeStub* slow_path = new NewTypeArrayStub(klass_reg, len, reg, info); 910 __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, elem_type, klass_reg, slow_path); 911 912 LIR_Opr result = rlock_result(x); 913 __ move(reg, result); 914 } 915 916 917 void LIRGenerator::do_NewObjectArray(NewObjectArray* x) { 918 // Evaluate state_for early since it may emit code. 919 CodeEmitInfo* info = state_for(x, x->state()); 920 // in case of patching (i.e., object class is not yet loaded), we need to reexecute the instruction 921 // and therefore provide the state before the parameters have been consumed 922 CodeEmitInfo* patching_info = NULL; 923 if (!x->klass()->is_loaded() || PatchALot) { 924 patching_info = state_for(x, x->state_before()); 925 } 926 927 LIRItem length(x->length(), this); 928 length.load_item(); 929 930 const LIR_Opr reg = result_register_for(x->type()); 931 LIR_Opr tmp1 = FrameMap::G1_oop_opr; 932 LIR_Opr tmp2 = FrameMap::G3_oop_opr; 933 LIR_Opr tmp3 = FrameMap::G4_oop_opr; 934 LIR_Opr tmp4 = FrameMap::O1_oop_opr; 935 LIR_Opr klass_reg = FrameMap::G5_metadata_opr; 936 LIR_Opr len = length.result(); 937 938 CodeStub* slow_path = new NewObjectArrayStub(klass_reg, len, reg, info); 939 ciMetadata* obj = ciObjArrayKlass::make(x->klass()); 940 if (obj == ciEnv::unloaded_ciobjarrayklass()) { 941 BAILOUT("encountered unloaded_ciobjarrayklass due to out of memory error"); 942 } 943 klass2reg_with_patching(klass_reg, obj, patching_info); 944 __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, T_OBJECT, klass_reg, slow_path); 945 946 LIR_Opr result = rlock_result(x); 947 __ move(reg, result); 948 } 949 950 951 void LIRGenerator::do_NewMultiArray(NewMultiArray* x) { 952 Values* dims = x->dims(); 953 int i = dims->length(); 954 LIRItemList* items = new LIRItemList(dims->length(), NULL); 955 while (i-- > 0) { 956 LIRItem* size = new LIRItem(dims->at(i), this); 957 items->at_put(i, size); 958 } 959 960 // Evaluate state_for early since it may emit code. 961 CodeEmitInfo* patching_info = NULL; 962 if (!x->klass()->is_loaded() || PatchALot) { 963 patching_info = state_for(x, x->state_before()); 964 965 // Cannot re-use same xhandlers for multiple CodeEmitInfos, so 966 // clone all handlers (NOTE: Usually this is handled transparently 967 // by the CodeEmitInfo cloning logic in CodeStub constructors but 968 // is done explicitly here because a stub isn't being used). 969 x->set_exception_handlers(new XHandlers(x->exception_handlers())); 970 } 971 CodeEmitInfo* info = state_for(x, x->state()); 972 973 i = dims->length(); 974 while (i-- > 0) { 975 LIRItem* size = items->at(i); 976 size->load_item(); 977 store_stack_parameter (size->result(), 978 in_ByteSize(STACK_BIAS + 979 frame::memory_parameter_word_sp_offset * wordSize + 980 i * sizeof(jint))); 981 } 982 983 // This instruction can be deoptimized in the slow path : use 984 // O0 as result register. 985 const LIR_Opr klass_reg = FrameMap::O0_metadata_opr; 986 klass2reg_with_patching(klass_reg, x->klass(), patching_info); 987 LIR_Opr rank = FrameMap::O1_opr; 988 __ move(LIR_OprFact::intConst(x->rank()), rank); 989 LIR_Opr varargs = FrameMap::as_pointer_opr(O2); 990 int offset_from_sp = (frame::memory_parameter_word_sp_offset * wordSize) + STACK_BIAS; 991 __ add(FrameMap::SP_opr, 992 LIR_OprFact::intptrConst(offset_from_sp), 993 varargs); 994 LIR_OprList* args = new LIR_OprList(3); 995 args->append(klass_reg); 996 args->append(rank); 997 args->append(varargs); 998 const LIR_Opr reg = result_register_for(x->type()); 999 __ call_runtime(Runtime1::entry_for(Runtime1::new_multi_array_id), 1000 LIR_OprFact::illegalOpr, 1001 reg, args, info); 1002 1003 LIR_Opr result = rlock_result(x); 1004 __ move(reg, result); 1005 } 1006 1007 1008 void LIRGenerator::do_BlockBegin(BlockBegin* x) { 1009 } 1010 1011 1012 void LIRGenerator::do_CheckCast(CheckCast* x) { 1013 LIRItem obj(x->obj(), this); 1014 CodeEmitInfo* patching_info = NULL; 1015 if (!x->klass()->is_loaded() || (PatchALot && !x->is_incompatible_class_change_check())) { 1016 // must do this before locking the destination register as an oop register, 1017 // and before the obj is loaded (so x->obj()->item() is valid for creating a debug info location) 1018 patching_info = state_for(x, x->state_before()); 1019 } 1020 obj.load_item(); 1021 LIR_Opr out_reg = rlock_result(x); 1022 CodeStub* stub; 1023 CodeEmitInfo* info_for_exception = state_for(x); 1024 1025 if (x->is_incompatible_class_change_check()) { 1026 assert(patching_info == NULL, "can't patch this"); 1027 stub = new SimpleExceptionStub(Runtime1::throw_incompatible_class_change_error_id, LIR_OprFact::illegalOpr, info_for_exception); 1028 } else { 1029 stub = new SimpleExceptionStub(Runtime1::throw_class_cast_exception_id, obj.result(), info_for_exception); 1030 } 1031 LIR_Opr tmp1 = FrameMap::G1_oop_opr; 1032 LIR_Opr tmp2 = FrameMap::G3_oop_opr; 1033 LIR_Opr tmp3 = FrameMap::G4_oop_opr; 1034 __ checkcast(out_reg, obj.result(), x->klass(), tmp1, tmp2, tmp3, 1035 x->direct_compare(), info_for_exception, patching_info, stub, 1036 x->profiled_method(), x->profiled_bci()); 1037 } 1038 1039 1040 void LIRGenerator::do_InstanceOf(InstanceOf* x) { 1041 LIRItem obj(x->obj(), this); 1042 CodeEmitInfo* patching_info = NULL; 1043 if (!x->klass()->is_loaded() || PatchALot) { 1044 patching_info = state_for(x, x->state_before()); 1045 } 1046 // ensure the result register is not the input register because the result is initialized before the patching safepoint 1047 obj.load_item(); 1048 LIR_Opr out_reg = rlock_result(x); 1049 LIR_Opr tmp1 = FrameMap::G1_oop_opr; 1050 LIR_Opr tmp2 = FrameMap::G3_oop_opr; 1051 LIR_Opr tmp3 = FrameMap::G4_oop_opr; 1052 __ instanceof(out_reg, obj.result(), x->klass(), tmp1, tmp2, tmp3, 1053 x->direct_compare(), patching_info, 1054 x->profiled_method(), x->profiled_bci()); 1055 } 1056 1057 1058 void LIRGenerator::do_If(If* x) { 1059 assert(x->number_of_sux() == 2, "inconsistency"); 1060 ValueTag tag = x->x()->type()->tag(); 1061 LIRItem xitem(x->x(), this); 1062 LIRItem yitem(x->y(), this); 1063 LIRItem* xin = &xitem; 1064 LIRItem* yin = &yitem; 1065 If::Condition cond = x->cond(); 1066 1067 if (tag == longTag) { 1068 // for longs, only conditions "eql", "neq", "lss", "geq" are valid; 1069 // mirror for other conditions 1070 if (cond == If::gtr || cond == If::leq) { 1071 // swap inputs 1072 cond = Instruction::mirror(cond); 1073 xin = &yitem; 1074 yin = &xitem; 1075 } 1076 xin->set_destroys_register(); 1077 } 1078 1079 LIR_Opr left = LIR_OprFact::illegalOpr; 1080 LIR_Opr right = LIR_OprFact::illegalOpr; 1081 1082 xin->load_item(); 1083 left = xin->result(); 1084 1085 if (is_simm13(yin->result())) { 1086 // inline int constants which are small enough to be immediate operands 1087 right = LIR_OprFact::value_type(yin->value()->type()); 1088 } else if (tag == longTag && yin->is_constant() && yin->get_jlong_constant() == 0 && 1089 (cond == If::eql || cond == If::neq)) { 1090 // inline long zero 1091 right = LIR_OprFact::value_type(yin->value()->type()); 1092 } else if (tag == objectTag && yin->is_constant() && (yin->get_jobject_constant()->is_null_object())) { 1093 right = LIR_OprFact::value_type(yin->value()->type()); 1094 } else { 1095 yin->load_item(); 1096 right = yin->result(); 1097 } 1098 set_no_result(x); 1099 1100 // add safepoint before generating condition code so it can be recomputed 1101 if (x->is_safepoint()) { 1102 // increment backedge counter if needed 1103 increment_backedge_counter(state_for(x, x->state_before()), x->profiled_bci()); 1104 __ safepoint(new_register(T_INT), state_for(x, x->state_before())); 1105 } 1106 1107 __ cmp(lir_cond(cond), left, right); 1108 // Generate branch profiling. Profiling code doesn't kill flags. 1109 profile_branch(x, cond); 1110 move_to_phi(x->state()); 1111 if (x->x()->type()->is_float_kind()) { 1112 __ branch(lir_cond(cond), right->type(), x->tsux(), x->usux()); 1113 } else { 1114 __ branch(lir_cond(cond), right->type(), x->tsux()); 1115 } 1116 assert(x->default_sux() == x->fsux(), "wrong destination above"); 1117 __ jump(x->default_sux()); 1118 } 1119 1120 1121 LIR_Opr LIRGenerator::getThreadPointer() { 1122 return FrameMap::as_pointer_opr(G2); 1123 } 1124 1125 1126 void LIRGenerator::trace_block_entry(BlockBegin* block) { 1127 __ move(LIR_OprFact::intConst(block->block_id()), FrameMap::O0_opr); 1128 LIR_OprList* args = new LIR_OprList(1); 1129 args->append(FrameMap::O0_opr); 1130 address func = CAST_FROM_FN_PTR(address, Runtime1::trace_block_entry); 1131 __ call_runtime_leaf(func, rlock_callee_saved(T_INT), LIR_OprFact::illegalOpr, args); 1132 } 1133 1134 1135 void LIRGenerator::volatile_field_store(LIR_Opr value, LIR_Address* address, 1136 CodeEmitInfo* info) { 1137 #ifdef _LP64 1138 __ store(value, address, info); 1139 #else 1140 __ volatile_store_mem_reg(value, address, info); 1141 #endif 1142 } 1143 1144 void LIRGenerator::volatile_field_load(LIR_Address* address, LIR_Opr result, 1145 CodeEmitInfo* info) { 1146 #ifdef _LP64 1147 __ load(address, result, info); 1148 #else 1149 __ volatile_load_mem_reg(address, result, info); 1150 #endif 1151 } 1152 1153 1154 void LIRGenerator::put_Object_unsafe(LIR_Opr src, LIR_Opr offset, LIR_Opr data, 1155 BasicType type, bool is_volatile) { 1156 LIR_Opr base_op = src; 1157 LIR_Opr index_op = offset; 1158 1159 bool is_obj = (type == T_ARRAY || type == T_OBJECT); 1160 #ifndef _LP64 1161 if (is_volatile && type == T_LONG) { 1162 __ volatile_store_unsafe_reg(data, src, offset, type, NULL, lir_patch_none); 1163 } else 1164 #endif 1165 { 1166 if (type == T_BOOLEAN) { 1167 type = T_BYTE; 1168 } 1169 LIR_Address* addr; 1170 if (type == T_ARRAY || type == T_OBJECT) { 1171 LIR_Opr tmp = new_pointer_register(); 1172 __ add(base_op, index_op, tmp); 1173 addr = new LIR_Address(tmp, type); 1174 } else { 1175 addr = new LIR_Address(base_op, index_op, type); 1176 } 1177 1178 if (is_obj) { 1179 pre_barrier(LIR_OprFact::address(addr), LIR_OprFact::illegalOpr /* pre_val */, 1180 true /* do_load */, false /* patch */, NULL); 1181 // _bs->c1_write_barrier_pre(this, LIR_OprFact::address(addr)); 1182 } 1183 __ move(data, addr); 1184 if (is_obj) { 1185 // This address is precise 1186 post_barrier(LIR_OprFact::address(addr), data); 1187 } 1188 } 1189 } 1190 1191 1192 void LIRGenerator::get_Object_unsafe(LIR_Opr dst, LIR_Opr src, LIR_Opr offset, 1193 BasicType type, bool is_volatile) { 1194 #ifndef _LP64 1195 if (is_volatile && type == T_LONG) { 1196 __ volatile_load_unsafe_reg(src, offset, dst, type, NULL, lir_patch_none); 1197 } else 1198 #endif 1199 { 1200 LIR_Address* addr = new LIR_Address(src, offset, type); 1201 __ load(addr, dst); 1202 } 1203 } 1204 1205 void LIRGenerator::do_UnsafeGetAndSetObject(UnsafeGetAndSetObject* x) { 1206 BasicType type = x->basic_type(); 1207 LIRItem src(x->object(), this); 1208 LIRItem off(x->offset(), this); 1209 LIRItem value(x->value(), this); 1210 1211 src.load_item(); 1212 value.load_item(); 1213 off.load_nonconstant(); 1214 1215 LIR_Opr dst = rlock_result(x, type); 1216 LIR_Opr data = value.result(); 1217 bool is_obj = (type == T_ARRAY || type == T_OBJECT); 1218 LIR_Opr offset = off.result(); 1219 1220 if (data != dst) { 1221 __ move(data, dst); 1222 data = dst; 1223 } 1224 1225 assert (!x->is_add() && (type == T_INT || (is_obj LP64_ONLY(&& UseCompressedOops))), "unexpected type"); 1226 LIR_Address* addr; 1227 if (offset->is_constant()) { 1228 1229 #ifdef _LP64 1230 jlong l = offset->as_jlong(); 1231 assert((jlong)((jint)l) == l, "offset too large for constant"); 1232 jint c = (jint)l; 1233 #else 1234 jint c = offset->as_jint(); 1235 #endif 1236 addr = new LIR_Address(src.result(), c, type); 1237 } else { 1238 addr = new LIR_Address(src.result(), offset, type); 1239 } 1240 1241 LIR_Opr tmp = LIR_OprFact::illegalOpr; 1242 LIR_Opr ptr = LIR_OprFact::illegalOpr; 1243 1244 if (is_obj) { 1245 // Do the pre-write barrier, if any. 1246 // barriers on sparc don't work with a base + index address 1247 tmp = FrameMap::G3_opr; 1248 ptr = new_pointer_register(); 1249 __ add(src.result(), off.result(), ptr); 1250 pre_barrier(ptr, LIR_OprFact::illegalOpr /* pre_val */, 1251 true /* do_load */, false /* patch */, NULL); 1252 } 1253 __ xchg(LIR_OprFact::address(addr), data, dst, tmp); 1254 if (is_obj) { 1255 // Seems to be a precise address 1256 post_barrier(ptr, data); 1257 } 1258 }