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 = NULL; 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 = NULL; 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 || x->id() == vmIntrinsics::_dlog || 813 x->id() == vmIntrinsics::_dcos || x->id() == vmIntrinsics::_dsin) { 814 do_LibmIntrinsic(x); 815 return; 816 } 817 818 LIRItem value(x->argument_at(0), this); 819 820 bool use_fpu = false; 821 if (UseSSE >= 2) { 822 switch (x->id()) { 823 case vmIntrinsics::_dtan: 824 case vmIntrinsics::_dlog10: 825 case vmIntrinsics::_dpow: 826 use_fpu = true; 827 break; 828 } 829 } else { 830 value.set_destroys_register(); 831 } 832 833 value.load_item(); 834 835 LIR_Opr calc_input = value.result(); 836 LIR_Opr calc_input2 = NULL; 837 if (x->id() == vmIntrinsics::_dpow) { 838 LIRItem extra_arg(x->argument_at(1), this); 839 if (UseSSE < 2) { 840 extra_arg.set_destroys_register(); 841 } 842 extra_arg.load_item(); 843 calc_input2 = extra_arg.result(); 844 } 845 LIR_Opr calc_result = rlock_result(x); 846 847 // sin, cos, pow and exp need two free fpu stack slots, so register 848 // two temporary operands 849 LIR_Opr tmp1 = FrameMap::caller_save_fpu_reg_at(0); 850 LIR_Opr tmp2 = FrameMap::caller_save_fpu_reg_at(1); 851 852 if (use_fpu) { 853 LIR_Opr tmp = FrameMap::fpu0_double_opr; 854 int tmp_start = 1; 855 if (calc_input2 != NULL) { 856 __ move(calc_input2, tmp); 857 tmp_start = 2; 858 calc_input2 = tmp; 859 } 860 __ move(calc_input, tmp); 861 862 calc_input = tmp; 863 calc_result = tmp; 864 865 tmp1 = FrameMap::caller_save_fpu_reg_at(tmp_start); 866 tmp2 = FrameMap::caller_save_fpu_reg_at(tmp_start + 1); 867 } 868 869 switch(x->id()) { 870 case vmIntrinsics::_dabs: __ abs (calc_input, calc_result, LIR_OprFact::illegalOpr); break; 871 case vmIntrinsics::_dsqrt: __ sqrt (calc_input, calc_result, LIR_OprFact::illegalOpr); break; 872 case vmIntrinsics::_dtan: __ tan (calc_input, calc_result, tmp1, tmp2); break; 873 case vmIntrinsics::_dlog10: __ log10(calc_input, calc_result, tmp1); break; 874 case vmIntrinsics::_dpow: __ pow (calc_input, calc_input2, calc_result, tmp1, tmp2, FrameMap::rax_opr, FrameMap::rcx_opr, FrameMap::rdx_opr); break; 875 default: ShouldNotReachHere(); 876 } 877 878 if (use_fpu) { 879 __ move(calc_result, x->operand()); 880 } 881 } 882 883 void LIRGenerator::do_LibmIntrinsic(Intrinsic* x) { 884 LIRItem value(x->argument_at(0), this); 885 value.set_destroys_register(); 886 887 LIR_Opr calc_result = rlock_result(x); 888 LIR_Opr result_reg = result_register_for(x->type()); 889 890 BasicTypeList signature(1); 891 signature.append(T_DOUBLE); 892 CallingConvention* cc = frame_map()->c_calling_convention(&signature); 893 894 value.load_item_force(cc->at(0)); 895 896 #ifndef _LP64 897 LIR_Opr tmp = FrameMap::fpu0_double_opr; 898 result_reg = tmp; 899 switch(x->id()) { 900 case vmIntrinsics::_dexp: 901 if (VM_Version::supports_sse2()) { 902 __ call_runtime_leaf(StubRoutines::dexp(), getThreadTemp(), result_reg, cc->args()); 903 } else { 904 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dexp), getThreadTemp(), result_reg, cc->args()); 905 } 906 break; 907 case vmIntrinsics::_dlog: 908 if (VM_Version::supports_sse2()) { 909 __ call_runtime_leaf(StubRoutines::dlog(), getThreadTemp(), result_reg, cc->args()); 910 } else { 911 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dlog), getThreadTemp(), result_reg, cc->args()); 912 } 913 break; 914 case vmIntrinsics::_dsin: 915 if (VM_Version::supports_sse2() && StubRoutines::dsin() != NULL) { 916 __ call_runtime_leaf(StubRoutines::dsin(), getThreadTemp(), result_reg, cc->args()); 917 } else { 918 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dsin), getThreadTemp(), result_reg, cc->args()); 919 } 920 break; 921 case vmIntrinsics::_dcos: 922 if (VM_Version::supports_sse2() && StubRoutines::dcos() != NULL) { 923 __ call_runtime_leaf(StubRoutines::dcos(), getThreadTemp(), result_reg, cc->args()); 924 } else { 925 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dcos), getThreadTemp(), result_reg, cc->args()); 926 } 927 break; 928 default: ShouldNotReachHere(); 929 } 930 #else 931 switch (x->id()) { 932 case vmIntrinsics::_dexp: 933 __ call_runtime_leaf(StubRoutines::dexp(), getThreadTemp(), result_reg, cc->args()); 934 break; 935 case vmIntrinsics::_dlog: 936 __ call_runtime_leaf(StubRoutines::dlog(), getThreadTemp(), result_reg, cc->args()); 937 break; 938 case vmIntrinsics::_dsin: 939 if (StubRoutines::dsin() != NULL) { 940 __ call_runtime_leaf(StubRoutines::dsin(), getThreadTemp(), result_reg, cc->args()); 941 } else { 942 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dsin), getThreadTemp(), result_reg, cc->args()); 943 } 944 break; 945 case vmIntrinsics::_dcos: 946 if (StubRoutines::dcos() != NULL) { 947 __ call_runtime_leaf(StubRoutines::dcos(), getThreadTemp(), result_reg, cc->args()); 948 } else { 949 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dcos), getThreadTemp(), result_reg, cc->args()); 950 } 951 break; 952 } 953 #endif 954 __ move(result_reg, calc_result); 955 } 956 957 void LIRGenerator::do_ArrayCopy(Intrinsic* x) { 958 assert(x->number_of_arguments() == 5, "wrong type"); 959 960 // Make all state_for calls early since they can emit code 961 CodeEmitInfo* info = state_for(x, x->state()); 962 963 LIRItem src(x->argument_at(0), this); 964 LIRItem src_pos(x->argument_at(1), this); 965 LIRItem dst(x->argument_at(2), this); 966 LIRItem dst_pos(x->argument_at(3), this); 967 LIRItem length(x->argument_at(4), this); 968 969 // operands for arraycopy must use fixed registers, otherwise 970 // LinearScan will fail allocation (because arraycopy always needs a 971 // call) 972 973 #ifndef _LP64 974 src.load_item_force (FrameMap::rcx_oop_opr); 975 src_pos.load_item_force (FrameMap::rdx_opr); 976 dst.load_item_force (FrameMap::rax_oop_opr); 977 dst_pos.load_item_force (FrameMap::rbx_opr); 978 length.load_item_force (FrameMap::rdi_opr); 979 LIR_Opr tmp = (FrameMap::rsi_opr); 980 #else 981 982 // The java calling convention will give us enough registers 983 // so that on the stub side the args will be perfect already. 984 // On the other slow/special case side we call C and the arg 985 // positions are not similar enough to pick one as the best. 986 // Also because the java calling convention is a "shifted" version 987 // of the C convention we can process the java args trivially into C 988 // args without worry of overwriting during the xfer 989 990 src.load_item_force (FrameMap::as_oop_opr(j_rarg0)); 991 src_pos.load_item_force (FrameMap::as_opr(j_rarg1)); 992 dst.load_item_force (FrameMap::as_oop_opr(j_rarg2)); 993 dst_pos.load_item_force (FrameMap::as_opr(j_rarg3)); 994 length.load_item_force (FrameMap::as_opr(j_rarg4)); 995 996 LIR_Opr tmp = FrameMap::as_opr(j_rarg5); 997 #endif // LP64 998 999 set_no_result(x); 1000 1001 int flags; 1002 ciArrayKlass* expected_type; 1003 arraycopy_helper(x, &flags, &expected_type); 1004 1005 __ arraycopy(src.result(), src_pos.result(), dst.result(), dst_pos.result(), length.result(), tmp, expected_type, flags, info); // does add_safepoint 1006 } 1007 1008 void LIRGenerator::do_update_CRC32(Intrinsic* x) { 1009 assert(UseCRC32Intrinsics, "need AVX and LCMUL instructions support"); 1010 // Make all state_for calls early since they can emit code 1011 LIR_Opr result = rlock_result(x); 1012 int flags = 0; 1013 switch (x->id()) { 1014 case vmIntrinsics::_updateCRC32: { 1015 LIRItem crc(x->argument_at(0), this); 1016 LIRItem val(x->argument_at(1), this); 1017 // val is destroyed by update_crc32 1018 val.set_destroys_register(); 1019 crc.load_item(); 1020 val.load_item(); 1021 __ update_crc32(crc.result(), val.result(), result); 1022 break; 1023 } 1024 case vmIntrinsics::_updateBytesCRC32: 1025 case vmIntrinsics::_updateByteBufferCRC32: { 1026 bool is_updateBytes = (x->id() == vmIntrinsics::_updateBytesCRC32); 1027 1028 LIRItem crc(x->argument_at(0), this); 1029 LIRItem buf(x->argument_at(1), this); 1030 LIRItem off(x->argument_at(2), this); 1031 LIRItem len(x->argument_at(3), this); 1032 buf.load_item(); 1033 off.load_nonconstant(); 1034 1035 LIR_Opr index = off.result(); 1036 int offset = is_updateBytes ? arrayOopDesc::base_offset_in_bytes(T_BYTE) : 0; 1037 if(off.result()->is_constant()) { 1038 index = LIR_OprFact::illegalOpr; 1039 offset += off.result()->as_jint(); 1040 } 1041 LIR_Opr base_op = buf.result(); 1042 1043 #ifndef _LP64 1044 if (!is_updateBytes) { // long b raw address 1045 base_op = new_register(T_INT); 1046 __ convert(Bytecodes::_l2i, buf.result(), base_op); 1047 } 1048 #else 1049 if (index->is_valid()) { 1050 LIR_Opr tmp = new_register(T_LONG); 1051 __ convert(Bytecodes::_i2l, index, tmp); 1052 index = tmp; 1053 } 1054 #endif 1055 1056 LIR_Address* a = new LIR_Address(base_op, 1057 index, 1058 LIR_Address::times_1, 1059 offset, 1060 T_BYTE); 1061 BasicTypeList signature(3); 1062 signature.append(T_INT); 1063 signature.append(T_ADDRESS); 1064 signature.append(T_INT); 1065 CallingConvention* cc = frame_map()->c_calling_convention(&signature); 1066 const LIR_Opr result_reg = result_register_for(x->type()); 1067 1068 LIR_Opr addr = new_pointer_register(); 1069 __ leal(LIR_OprFact::address(a), addr); 1070 1071 crc.load_item_force(cc->at(0)); 1072 __ move(addr, cc->at(1)); 1073 len.load_item_force(cc->at(2)); 1074 1075 __ call_runtime_leaf(StubRoutines::updateBytesCRC32(), getThreadTemp(), result_reg, cc->args()); 1076 __ move(result_reg, result); 1077 1078 break; 1079 } 1080 default: { 1081 ShouldNotReachHere(); 1082 } 1083 } 1084 } 1085 1086 // _i2l, _i2f, _i2d, _l2i, _l2f, _l2d, _f2i, _f2l, _f2d, _d2i, _d2l, _d2f 1087 // _i2b, _i2c, _i2s 1088 LIR_Opr fixed_register_for(BasicType type) { 1089 switch (type) { 1090 case T_FLOAT: return FrameMap::fpu0_float_opr; 1091 case T_DOUBLE: return FrameMap::fpu0_double_opr; 1092 case T_INT: return FrameMap::rax_opr; 1093 case T_LONG: return FrameMap::long0_opr; 1094 default: ShouldNotReachHere(); return LIR_OprFact::illegalOpr; 1095 } 1096 } 1097 1098 void LIRGenerator::do_Convert(Convert* x) { 1099 // flags that vary for the different operations and different SSE-settings 1100 bool fixed_input = false, fixed_result = false, round_result = false, needs_stub = false; 1101 1102 switch (x->op()) { 1103 case Bytecodes::_i2l: // fall through 1104 case Bytecodes::_l2i: // fall through 1105 case Bytecodes::_i2b: // fall through 1106 case Bytecodes::_i2c: // fall through 1107 case Bytecodes::_i2s: fixed_input = false; fixed_result = false; round_result = false; needs_stub = false; break; 1108 1109 case Bytecodes::_f2d: fixed_input = UseSSE == 1; fixed_result = false; round_result = false; needs_stub = false; break; 1110 case Bytecodes::_d2f: fixed_input = false; fixed_result = UseSSE == 1; round_result = UseSSE < 1; needs_stub = false; break; 1111 case Bytecodes::_i2f: fixed_input = false; fixed_result = false; round_result = UseSSE < 1; needs_stub = false; break; 1112 case Bytecodes::_i2d: fixed_input = false; fixed_result = false; round_result = false; needs_stub = false; break; 1113 case Bytecodes::_f2i: fixed_input = false; fixed_result = false; round_result = false; needs_stub = true; break; 1114 case Bytecodes::_d2i: fixed_input = false; fixed_result = false; round_result = false; needs_stub = true; break; 1115 case Bytecodes::_l2f: fixed_input = false; fixed_result = UseSSE >= 1; round_result = UseSSE < 1; needs_stub = false; break; 1116 case Bytecodes::_l2d: fixed_input = false; fixed_result = UseSSE >= 2; round_result = UseSSE < 2; needs_stub = false; break; 1117 case Bytecodes::_f2l: fixed_input = true; fixed_result = true; round_result = false; needs_stub = false; break; 1118 case Bytecodes::_d2l: fixed_input = true; fixed_result = true; round_result = false; needs_stub = false; break; 1119 default: ShouldNotReachHere(); 1120 } 1121 1122 LIRItem value(x->value(), this); 1123 value.load_item(); 1124 LIR_Opr input = value.result(); 1125 LIR_Opr result = rlock(x); 1126 1127 // arguments of lir_convert 1128 LIR_Opr conv_input = input; 1129 LIR_Opr conv_result = result; 1130 ConversionStub* stub = NULL; 1131 1132 if (fixed_input) { 1133 conv_input = fixed_register_for(input->type()); 1134 __ move(input, conv_input); 1135 } 1136 1137 assert(fixed_result == false || round_result == false, "cannot set both"); 1138 if (fixed_result) { 1139 conv_result = fixed_register_for(result->type()); 1140 } else if (round_result) { 1141 result = new_register(result->type()); 1142 set_vreg_flag(result, must_start_in_memory); 1143 } 1144 1145 if (needs_stub) { 1146 stub = new ConversionStub(x->op(), conv_input, conv_result); 1147 } 1148 1149 __ convert(x->op(), conv_input, conv_result, stub); 1150 1151 if (result != conv_result) { 1152 __ move(conv_result, result); 1153 } 1154 1155 assert(result->is_virtual(), "result must be virtual register"); 1156 set_result(x, result); 1157 } 1158 1159 1160 void LIRGenerator::do_NewInstance(NewInstance* x) { 1161 print_if_not_loaded(x); 1162 1163 CodeEmitInfo* info = state_for(x, x->state()); 1164 LIR_Opr reg = result_register_for(x->type()); 1165 new_instance(reg, x->klass(), x->is_unresolved(), 1166 FrameMap::rcx_oop_opr, 1167 FrameMap::rdi_oop_opr, 1168 FrameMap::rsi_oop_opr, 1169 LIR_OprFact::illegalOpr, 1170 FrameMap::rdx_metadata_opr, info); 1171 LIR_Opr result = rlock_result(x); 1172 __ move(reg, result); 1173 } 1174 1175 1176 void LIRGenerator::do_NewTypeArray(NewTypeArray* x) { 1177 CodeEmitInfo* info = state_for(x, x->state()); 1178 1179 LIRItem length(x->length(), this); 1180 length.load_item_force(FrameMap::rbx_opr); 1181 1182 LIR_Opr reg = result_register_for(x->type()); 1183 LIR_Opr tmp1 = FrameMap::rcx_oop_opr; 1184 LIR_Opr tmp2 = FrameMap::rsi_oop_opr; 1185 LIR_Opr tmp3 = FrameMap::rdi_oop_opr; 1186 LIR_Opr tmp4 = reg; 1187 LIR_Opr klass_reg = FrameMap::rdx_metadata_opr; 1188 LIR_Opr len = length.result(); 1189 BasicType elem_type = x->elt_type(); 1190 1191 __ metadata2reg(ciTypeArrayKlass::make(elem_type)->constant_encoding(), klass_reg); 1192 1193 CodeStub* slow_path = new NewTypeArrayStub(klass_reg, len, reg, info); 1194 __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, elem_type, klass_reg, slow_path); 1195 1196 LIR_Opr result = rlock_result(x); 1197 __ move(reg, result); 1198 } 1199 1200 1201 void LIRGenerator::do_NewObjectArray(NewObjectArray* x) { 1202 LIRItem length(x->length(), this); 1203 // in case of patching (i.e., object class is not yet loaded), we need to reexecute the instruction 1204 // and therefore provide the state before the parameters have been consumed 1205 CodeEmitInfo* patching_info = NULL; 1206 if (!x->klass()->is_loaded() || PatchALot) { 1207 patching_info = state_for(x, x->state_before()); 1208 } 1209 1210 CodeEmitInfo* info = state_for(x, x->state()); 1211 1212 const LIR_Opr reg = result_register_for(x->type()); 1213 LIR_Opr tmp1 = FrameMap::rcx_oop_opr; 1214 LIR_Opr tmp2 = FrameMap::rsi_oop_opr; 1215 LIR_Opr tmp3 = FrameMap::rdi_oop_opr; 1216 LIR_Opr tmp4 = reg; 1217 LIR_Opr klass_reg = FrameMap::rdx_metadata_opr; 1218 1219 length.load_item_force(FrameMap::rbx_opr); 1220 LIR_Opr len = length.result(); 1221 1222 CodeStub* slow_path = new NewObjectArrayStub(klass_reg, len, reg, info); 1223 ciKlass* obj = (ciKlass*) ciObjArrayKlass::make(x->klass()); 1224 if (obj == ciEnv::unloaded_ciobjarrayklass()) { 1225 BAILOUT("encountered unloaded_ciobjarrayklass due to out of memory error"); 1226 } 1227 klass2reg_with_patching(klass_reg, obj, patching_info); 1228 __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, T_OBJECT, klass_reg, slow_path); 1229 1230 LIR_Opr result = rlock_result(x); 1231 __ move(reg, result); 1232 } 1233 1234 1235 void LIRGenerator::do_NewMultiArray(NewMultiArray* x) { 1236 Values* dims = x->dims(); 1237 int i = dims->length(); 1238 LIRItemList* items = new LIRItemList(dims->length(), NULL); 1239 while (i-- > 0) { 1240 LIRItem* size = new LIRItem(dims->at(i), this); 1241 items->at_put(i, size); 1242 } 1243 1244 // Evaluate state_for early since it may emit code. 1245 CodeEmitInfo* patching_info = NULL; 1246 if (!x->klass()->is_loaded() || PatchALot) { 1247 patching_info = state_for(x, x->state_before()); 1248 1249 // Cannot re-use same xhandlers for multiple CodeEmitInfos, so 1250 // clone all handlers (NOTE: Usually this is handled transparently 1251 // by the CodeEmitInfo cloning logic in CodeStub constructors but 1252 // is done explicitly here because a stub isn't being used). 1253 x->set_exception_handlers(new XHandlers(x->exception_handlers())); 1254 } 1255 CodeEmitInfo* info = state_for(x, x->state()); 1256 1257 i = dims->length(); 1258 while (i-- > 0) { 1259 LIRItem* size = items->at(i); 1260 size->load_nonconstant(); 1261 1262 store_stack_parameter(size->result(), in_ByteSize(i*4)); 1263 } 1264 1265 LIR_Opr klass_reg = FrameMap::rax_metadata_opr; 1266 klass2reg_with_patching(klass_reg, x->klass(), patching_info); 1267 1268 LIR_Opr rank = FrameMap::rbx_opr; 1269 __ move(LIR_OprFact::intConst(x->rank()), rank); 1270 LIR_Opr varargs = FrameMap::rcx_opr; 1271 __ move(FrameMap::rsp_opr, varargs); 1272 LIR_OprList* args = new LIR_OprList(3); 1273 args->append(klass_reg); 1274 args->append(rank); 1275 args->append(varargs); 1276 LIR_Opr reg = result_register_for(x->type()); 1277 __ call_runtime(Runtime1::entry_for(Runtime1::new_multi_array_id), 1278 LIR_OprFact::illegalOpr, 1279 reg, args, info); 1280 1281 LIR_Opr result = rlock_result(x); 1282 __ move(reg, result); 1283 } 1284 1285 1286 void LIRGenerator::do_BlockBegin(BlockBegin* x) { 1287 // nothing to do for now 1288 } 1289 1290 1291 void LIRGenerator::do_CheckCast(CheckCast* x) { 1292 LIRItem obj(x->obj(), this); 1293 1294 CodeEmitInfo* patching_info = NULL; 1295 if (!x->klass()->is_loaded() || (PatchALot && !x->is_incompatible_class_change_check())) { 1296 // must do this before locking the destination register as an oop register, 1297 // and before the obj is loaded (the latter is for deoptimization) 1298 patching_info = state_for(x, x->state_before()); 1299 } 1300 obj.load_item(); 1301 1302 // info for exceptions 1303 CodeEmitInfo* info_for_exception = state_for(x); 1304 1305 CodeStub* stub; 1306 if (x->is_incompatible_class_change_check()) { 1307 assert(patching_info == NULL, "can't patch this"); 1308 stub = new SimpleExceptionStub(Runtime1::throw_incompatible_class_change_error_id, LIR_OprFact::illegalOpr, info_for_exception); 1309 } else { 1310 stub = new SimpleExceptionStub(Runtime1::throw_class_cast_exception_id, obj.result(), info_for_exception); 1311 } 1312 LIR_Opr reg = rlock_result(x); 1313 LIR_Opr tmp3 = LIR_OprFact::illegalOpr; 1314 if (!x->klass()->is_loaded() || UseCompressedClassPointers) { 1315 tmp3 = new_register(objectType); 1316 } 1317 __ checkcast(reg, obj.result(), x->klass(), 1318 new_register(objectType), new_register(objectType), tmp3, 1319 x->direct_compare(), info_for_exception, patching_info, stub, 1320 x->profiled_method(), x->profiled_bci()); 1321 } 1322 1323 1324 void LIRGenerator::do_InstanceOf(InstanceOf* x) { 1325 LIRItem obj(x->obj(), this); 1326 1327 // result and test object may not be in same register 1328 LIR_Opr reg = rlock_result(x); 1329 CodeEmitInfo* patching_info = NULL; 1330 if ((!x->klass()->is_loaded() || PatchALot)) { 1331 // must do this before locking the destination register as an oop register 1332 patching_info = state_for(x, x->state_before()); 1333 } 1334 obj.load_item(); 1335 LIR_Opr tmp3 = LIR_OprFact::illegalOpr; 1336 if (!x->klass()->is_loaded() || UseCompressedClassPointers) { 1337 tmp3 = new_register(objectType); 1338 } 1339 __ instanceof(reg, obj.result(), x->klass(), 1340 new_register(objectType), new_register(objectType), tmp3, 1341 x->direct_compare(), patching_info, x->profiled_method(), x->profiled_bci()); 1342 } 1343 1344 1345 void LIRGenerator::do_If(If* x) { 1346 assert(x->number_of_sux() == 2, "inconsistency"); 1347 ValueTag tag = x->x()->type()->tag(); 1348 bool is_safepoint = x->is_safepoint(); 1349 1350 If::Condition cond = x->cond(); 1351 1352 LIRItem xitem(x->x(), this); 1353 LIRItem yitem(x->y(), this); 1354 LIRItem* xin = &xitem; 1355 LIRItem* yin = &yitem; 1356 1357 if (tag == longTag) { 1358 // for longs, only conditions "eql", "neq", "lss", "geq" are valid; 1359 // mirror for other conditions 1360 if (cond == If::gtr || cond == If::leq) { 1361 cond = Instruction::mirror(cond); 1362 xin = &yitem; 1363 yin = &xitem; 1364 } 1365 xin->set_destroys_register(); 1366 } 1367 xin->load_item(); 1368 if (tag == longTag && yin->is_constant() && yin->get_jlong_constant() == 0 && (cond == If::eql || cond == If::neq)) { 1369 // inline long zero 1370 yin->dont_load_item(); 1371 } else if (tag == longTag || tag == floatTag || tag == doubleTag) { 1372 // longs cannot handle constants at right side 1373 yin->load_item(); 1374 } else { 1375 yin->dont_load_item(); 1376 } 1377 1378 // add safepoint before generating condition code so it can be recomputed 1379 if (x->is_safepoint()) { 1380 // increment backedge counter if needed 1381 increment_backedge_counter(state_for(x, x->state_before()), x->profiled_bci()); 1382 __ safepoint(LIR_OprFact::illegalOpr, state_for(x, x->state_before())); 1383 } 1384 set_no_result(x); 1385 1386 LIR_Opr left = xin->result(); 1387 LIR_Opr right = yin->result(); 1388 __ cmp(lir_cond(cond), left, right); 1389 // Generate branch profiling. Profiling code doesn't kill flags. 1390 profile_branch(x, cond); 1391 move_to_phi(x->state()); 1392 if (x->x()->type()->is_float_kind()) { 1393 __ branch(lir_cond(cond), right->type(), x->tsux(), x->usux()); 1394 } else { 1395 __ branch(lir_cond(cond), right->type(), x->tsux()); 1396 } 1397 assert(x->default_sux() == x->fsux(), "wrong destination above"); 1398 __ jump(x->default_sux()); 1399 } 1400 1401 1402 LIR_Opr LIRGenerator::getThreadPointer() { 1403 #ifdef _LP64 1404 return FrameMap::as_pointer_opr(r15_thread); 1405 #else 1406 LIR_Opr result = new_register(T_INT); 1407 __ get_thread(result); 1408 return result; 1409 #endif // 1410 } 1411 1412 void LIRGenerator::trace_block_entry(BlockBegin* block) { 1413 store_stack_parameter(LIR_OprFact::intConst(block->block_id()), in_ByteSize(0)); 1414 LIR_OprList* args = new LIR_OprList(); 1415 address func = CAST_FROM_FN_PTR(address, Runtime1::trace_block_entry); 1416 __ call_runtime_leaf(func, LIR_OprFact::illegalOpr, LIR_OprFact::illegalOpr, args); 1417 } 1418 1419 1420 void LIRGenerator::volatile_field_store(LIR_Opr value, LIR_Address* address, 1421 CodeEmitInfo* info) { 1422 if (address->type() == T_LONG) { 1423 address = new LIR_Address(address->base(), 1424 address->index(), address->scale(), 1425 address->disp(), T_DOUBLE); 1426 // Transfer the value atomically by using FP moves. This means 1427 // the value has to be moved between CPU and FPU registers. It 1428 // always has to be moved through spill slot since there's no 1429 // quick way to pack the value into an SSE register. 1430 LIR_Opr temp_double = new_register(T_DOUBLE); 1431 LIR_Opr spill = new_register(T_LONG); 1432 set_vreg_flag(spill, must_start_in_memory); 1433 __ move(value, spill); 1434 __ volatile_move(spill, temp_double, T_LONG); 1435 __ volatile_move(temp_double, LIR_OprFact::address(address), T_LONG, info); 1436 } else { 1437 __ store(value, address, info); 1438 } 1439 } 1440 1441 1442 1443 void LIRGenerator::volatile_field_load(LIR_Address* address, LIR_Opr result, 1444 CodeEmitInfo* info) { 1445 if (address->type() == T_LONG) { 1446 address = new LIR_Address(address->base(), 1447 address->index(), address->scale(), 1448 address->disp(), T_DOUBLE); 1449 // Transfer the value atomically by using FP moves. This means 1450 // the value has to be moved between CPU and FPU registers. In 1451 // SSE0 and SSE1 mode it has to be moved through spill slot but in 1452 // SSE2+ mode it can be moved directly. 1453 LIR_Opr temp_double = new_register(T_DOUBLE); 1454 __ volatile_move(LIR_OprFact::address(address), temp_double, T_LONG, info); 1455 __ volatile_move(temp_double, result, T_LONG); 1456 if (UseSSE < 2) { 1457 // no spill slot needed in SSE2 mode because xmm->cpu register move is possible 1458 set_vreg_flag(result, must_start_in_memory); 1459 } 1460 } else { 1461 __ load(address, result, info); 1462 } 1463 } 1464 1465 void LIRGenerator::get_Object_unsafe(LIR_Opr dst, LIR_Opr src, LIR_Opr offset, 1466 BasicType type, bool is_volatile) { 1467 if (is_volatile && type == T_LONG) { 1468 LIR_Address* addr = new LIR_Address(src, offset, T_DOUBLE); 1469 LIR_Opr tmp = new_register(T_DOUBLE); 1470 __ load(addr, tmp); 1471 LIR_Opr spill = new_register(T_LONG); 1472 set_vreg_flag(spill, must_start_in_memory); 1473 __ move(tmp, spill); 1474 __ move(spill, dst); 1475 } else { 1476 LIR_Address* addr = new LIR_Address(src, offset, type); 1477 __ load(addr, dst); 1478 } 1479 } 1480 1481 1482 void LIRGenerator::put_Object_unsafe(LIR_Opr src, LIR_Opr offset, LIR_Opr data, 1483 BasicType type, bool is_volatile) { 1484 if (is_volatile && type == T_LONG) { 1485 LIR_Address* addr = new LIR_Address(src, offset, T_DOUBLE); 1486 LIR_Opr tmp = new_register(T_DOUBLE); 1487 LIR_Opr spill = new_register(T_DOUBLE); 1488 set_vreg_flag(spill, must_start_in_memory); 1489 __ move(data, spill); 1490 __ move(spill, tmp); 1491 __ move(tmp, addr); 1492 } else { 1493 LIR_Address* addr = new LIR_Address(src, offset, type); 1494 bool is_obj = (type == T_ARRAY || type == T_OBJECT); 1495 if (is_obj) { 1496 // Do the pre-write barrier, if any. 1497 pre_barrier(LIR_OprFact::address(addr), LIR_OprFact::illegalOpr /* pre_val */, 1498 true /* do_load */, false /* patch */, NULL); 1499 __ move(data, addr); 1500 assert(src->is_register(), "must be register"); 1501 // Seems to be a precise address 1502 post_barrier(LIR_OprFact::address(addr), data); 1503 } else { 1504 __ move(data, addr); 1505 } 1506 } 1507 } 1508 1509 void LIRGenerator::do_UnsafeGetAndSetObject(UnsafeGetAndSetObject* x) { 1510 BasicType type = x->basic_type(); 1511 LIRItem src(x->object(), this); 1512 LIRItem off(x->offset(), this); 1513 LIRItem value(x->value(), this); 1514 1515 src.load_item(); 1516 value.load_item(); 1517 off.load_nonconstant(); 1518 1519 LIR_Opr dst = rlock_result(x, type); 1520 LIR_Opr data = value.result(); 1521 bool is_obj = (type == T_ARRAY || type == T_OBJECT); 1522 LIR_Opr offset = off.result(); 1523 1524 assert (type == T_INT || (!x->is_add() && is_obj) LP64_ONLY( || type == T_LONG ), "unexpected type"); 1525 LIR_Address* addr; 1526 if (offset->is_constant()) { 1527 #ifdef _LP64 1528 jlong c = offset->as_jlong(); 1529 if ((jlong)((jint)c) == c) { 1530 addr = new LIR_Address(src.result(), (jint)c, type); 1531 } else { 1532 LIR_Opr tmp = new_register(T_LONG); 1533 __ move(offset, tmp); 1534 addr = new LIR_Address(src.result(), tmp, type); 1535 } 1536 #else 1537 addr = new LIR_Address(src.result(), offset->as_jint(), type); 1538 #endif 1539 } else { 1540 addr = new LIR_Address(src.result(), offset, type); 1541 } 1542 1543 // Because we want a 2-arg form of xchg and xadd 1544 __ move(data, dst); 1545 1546 if (x->is_add()) { 1547 __ xadd(LIR_OprFact::address(addr), dst, dst, LIR_OprFact::illegalOpr); 1548 } else { 1549 if (is_obj) { 1550 // Do the pre-write barrier, if any. 1551 pre_barrier(LIR_OprFact::address(addr), LIR_OprFact::illegalOpr /* pre_val */, 1552 true /* do_load */, false /* patch */, NULL); 1553 } 1554 __ xchg(LIR_OprFact::address(addr), dst, dst, LIR_OprFact::illegalOpr); 1555 if (is_obj) { 1556 // Seems to be a precise address 1557 post_barrier(LIR_OprFact::address(addr), data); 1558 } 1559 } 1560 }