1 /* 2 * Copyright (c) 2000, 2011, 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_LIRAssembler.hpp" 28 #include "c1/c1_MacroAssembler.hpp" 29 #include "c1/c1_Runtime1.hpp" 30 #include "c1/c1_ValueStack.hpp" 31 #include "ci/ciArrayKlass.hpp" 32 #include "ci/ciInstance.hpp" 33 #include "gc_interface/collectedHeap.hpp" 34 #include "memory/barrierSet.hpp" 35 #include "memory/cardTableModRefBS.hpp" 36 #include "nativeInst_x86.hpp" 37 #include "oops/objArrayKlass.hpp" 38 #include "runtime/sharedRuntime.hpp" 39 40 41 // These masks are used to provide 128-bit aligned bitmasks to the XMM 42 // instructions, to allow sign-masking or sign-bit flipping. They allow 43 // fast versions of NegF/NegD and AbsF/AbsD. 44 45 // Note: 'double' and 'long long' have 32-bits alignment on x86. 46 static jlong* double_quadword(jlong *adr, jlong lo, jlong hi) { 47 // Use the expression (adr)&(~0xF) to provide 128-bits aligned address 48 // of 128-bits operands for SSE instructions. 49 jlong *operand = (jlong*)(((long)adr)&((long)(~0xF))); 50 // Store the value to a 128-bits operand. 51 operand[0] = lo; 52 operand[1] = hi; 53 return operand; 54 } 55 56 // Buffer for 128-bits masks used by SSE instructions. 57 static jlong fp_signmask_pool[(4+1)*2]; // 4*128bits(data) + 128bits(alignment) 58 59 // Static initialization during VM startup. 60 static jlong *float_signmask_pool = double_quadword(&fp_signmask_pool[1*2], CONST64(0x7FFFFFFF7FFFFFFF), CONST64(0x7FFFFFFF7FFFFFFF)); 61 static jlong *double_signmask_pool = double_quadword(&fp_signmask_pool[2*2], CONST64(0x7FFFFFFFFFFFFFFF), CONST64(0x7FFFFFFFFFFFFFFF)); 62 static jlong *float_signflip_pool = double_quadword(&fp_signmask_pool[3*2], CONST64(0x8000000080000000), CONST64(0x8000000080000000)); 63 static jlong *double_signflip_pool = double_quadword(&fp_signmask_pool[4*2], CONST64(0x8000000000000000), CONST64(0x8000000000000000)); 64 65 66 67 NEEDS_CLEANUP // remove this definitions ? 68 const Register IC_Klass = rax; // where the IC klass is cached 69 const Register SYNC_header = rax; // synchronization header 70 const Register SHIFT_count = rcx; // where count for shift operations must be 71 72 #define __ _masm-> 73 74 75 static void select_different_registers(Register preserve, 76 Register extra, 77 Register &tmp1, 78 Register &tmp2) { 79 if (tmp1 == preserve) { 80 assert_different_registers(tmp1, tmp2, extra); 81 tmp1 = extra; 82 } else if (tmp2 == preserve) { 83 assert_different_registers(tmp1, tmp2, extra); 84 tmp2 = extra; 85 } 86 assert_different_registers(preserve, tmp1, tmp2); 87 } 88 89 90 91 static void select_different_registers(Register preserve, 92 Register extra, 93 Register &tmp1, 94 Register &tmp2, 95 Register &tmp3) { 96 if (tmp1 == preserve) { 97 assert_different_registers(tmp1, tmp2, tmp3, extra); 98 tmp1 = extra; 99 } else if (tmp2 == preserve) { 100 assert_different_registers(tmp1, tmp2, tmp3, extra); 101 tmp2 = extra; 102 } else if (tmp3 == preserve) { 103 assert_different_registers(tmp1, tmp2, tmp3, extra); 104 tmp3 = extra; 105 } 106 assert_different_registers(preserve, tmp1, tmp2, tmp3); 107 } 108 109 110 111 bool LIR_Assembler::is_small_constant(LIR_Opr opr) { 112 if (opr->is_constant()) { 113 LIR_Const* constant = opr->as_constant_ptr(); 114 switch (constant->type()) { 115 case T_INT: { 116 return true; 117 } 118 119 default: 120 return false; 121 } 122 } 123 return false; 124 } 125 126 127 LIR_Opr LIR_Assembler::receiverOpr() { 128 return FrameMap::receiver_opr; 129 } 130 131 LIR_Opr LIR_Assembler::incomingReceiverOpr() { 132 return receiverOpr(); 133 } 134 135 LIR_Opr LIR_Assembler::osrBufferPointer() { 136 return FrameMap::as_pointer_opr(receiverOpr()->as_register()); 137 } 138 139 //--------------fpu register translations----------------------- 140 141 142 address LIR_Assembler::float_constant(float f) { 143 address const_addr = __ float_constant(f); 144 if (const_addr == NULL) { 145 bailout("const section overflow"); 146 return __ code()->consts()->start(); 147 } else { 148 return const_addr; 149 } 150 } 151 152 153 address LIR_Assembler::double_constant(double d) { 154 address const_addr = __ double_constant(d); 155 if (const_addr == NULL) { 156 bailout("const section overflow"); 157 return __ code()->consts()->start(); 158 } else { 159 return const_addr; 160 } 161 } 162 163 164 void LIR_Assembler::set_24bit_FPU() { 165 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_24())); 166 } 167 168 void LIR_Assembler::reset_FPU() { 169 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); 170 } 171 172 void LIR_Assembler::fpop() { 173 __ fpop(); 174 } 175 176 void LIR_Assembler::fxch(int i) { 177 __ fxch(i); 178 } 179 180 void LIR_Assembler::fld(int i) { 181 __ fld_s(i); 182 } 183 184 void LIR_Assembler::ffree(int i) { 185 __ ffree(i); 186 } 187 188 void LIR_Assembler::breakpoint() { 189 __ int3(); 190 } 191 192 void LIR_Assembler::push(LIR_Opr opr) { 193 if (opr->is_single_cpu()) { 194 __ push_reg(opr->as_register()); 195 } else if (opr->is_double_cpu()) { 196 NOT_LP64(__ push_reg(opr->as_register_hi())); 197 __ push_reg(opr->as_register_lo()); 198 } else if (opr->is_stack()) { 199 __ push_addr(frame_map()->address_for_slot(opr->single_stack_ix())); 200 } else if (opr->is_constant()) { 201 LIR_Const* const_opr = opr->as_constant_ptr(); 202 if (const_opr->type() == T_OBJECT) { 203 __ push_oop(const_opr->as_jobject()); 204 } else if (const_opr->type() == T_INT) { 205 __ push_jint(const_opr->as_jint()); 206 } else { 207 ShouldNotReachHere(); 208 } 209 210 } else { 211 ShouldNotReachHere(); 212 } 213 } 214 215 void LIR_Assembler::pop(LIR_Opr opr) { 216 if (opr->is_single_cpu()) { 217 __ pop_reg(opr->as_register()); 218 } else { 219 ShouldNotReachHere(); 220 } 221 } 222 223 bool LIR_Assembler::is_literal_address(LIR_Address* addr) { 224 return addr->base()->is_illegal() && addr->index()->is_illegal(); 225 } 226 227 //------------------------------------------- 228 229 Address LIR_Assembler::as_Address(LIR_Address* addr) { 230 return as_Address(addr, rscratch1); 231 } 232 233 Address LIR_Assembler::as_Address(LIR_Address* addr, Register tmp) { 234 if (addr->base()->is_illegal()) { 235 assert(addr->index()->is_illegal(), "must be illegal too"); 236 AddressLiteral laddr((address)addr->disp(), relocInfo::none); 237 if (! __ reachable(laddr)) { 238 __ movptr(tmp, laddr.addr()); 239 Address res(tmp, 0); 240 return res; 241 } else { 242 return __ as_Address(laddr); 243 } 244 } 245 246 Register base = addr->base()->as_pointer_register(); 247 248 if (addr->index()->is_illegal()) { 249 return Address( base, addr->disp()); 250 } else if (addr->index()->is_cpu_register()) { 251 Register index = addr->index()->as_pointer_register(); 252 return Address(base, index, (Address::ScaleFactor) addr->scale(), addr->disp()); 253 } else if (addr->index()->is_constant()) { 254 intptr_t addr_offset = (addr->index()->as_constant_ptr()->as_jint() << addr->scale()) + addr->disp(); 255 assert(Assembler::is_simm32(addr_offset), "must be"); 256 257 return Address(base, addr_offset); 258 } else { 259 Unimplemented(); 260 return Address(); 261 } 262 } 263 264 265 Address LIR_Assembler::as_Address_hi(LIR_Address* addr) { 266 Address base = as_Address(addr); 267 return Address(base._base, base._index, base._scale, base._disp + BytesPerWord); 268 } 269 270 271 Address LIR_Assembler::as_Address_lo(LIR_Address* addr) { 272 return as_Address(addr); 273 } 274 275 276 void LIR_Assembler::osr_entry() { 277 offsets()->set_value(CodeOffsets::OSR_Entry, code_offset()); 278 BlockBegin* osr_entry = compilation()->hir()->osr_entry(); 279 ValueStack* entry_state = osr_entry->state(); 280 int number_of_locks = entry_state->locks_size(); 281 282 // we jump here if osr happens with the interpreter 283 // state set up to continue at the beginning of the 284 // loop that triggered osr - in particular, we have 285 // the following registers setup: 286 // 287 // rcx: osr buffer 288 // 289 290 // build frame 291 ciMethod* m = compilation()->method(); 292 __ build_frame(initial_frame_size_in_bytes()); 293 294 // OSR buffer is 295 // 296 // locals[nlocals-1..0] 297 // monitors[0..number_of_locks] 298 // 299 // locals is a direct copy of the interpreter frame so in the osr buffer 300 // so first slot in the local array is the last local from the interpreter 301 // and last slot is local[0] (receiver) from the interpreter 302 // 303 // Similarly with locks. The first lock slot in the osr buffer is the nth lock 304 // from the interpreter frame, the nth lock slot in the osr buffer is 0th lock 305 // in the interpreter frame (the method lock if a sync method) 306 307 // Initialize monitors in the compiled activation. 308 // rcx: pointer to osr buffer 309 // 310 // All other registers are dead at this point and the locals will be 311 // copied into place by code emitted in the IR. 312 313 Register OSR_buf = osrBufferPointer()->as_pointer_register(); 314 { assert(frame::interpreter_frame_monitor_size() == BasicObjectLock::size(), "adjust code below"); 315 int monitor_offset = BytesPerWord * method()->max_locals() + 316 (2 * BytesPerWord) * (number_of_locks - 1); 317 // SharedRuntime::OSR_migration_begin() packs BasicObjectLocks in 318 // the OSR buffer using 2 word entries: first the lock and then 319 // the oop. 320 for (int i = 0; i < number_of_locks; i++) { 321 int slot_offset = monitor_offset - ((i * 2) * BytesPerWord); 322 #ifdef ASSERT 323 // verify the interpreter's monitor has a non-null object 324 { 325 Label L; 326 __ cmpptr(Address(OSR_buf, slot_offset + 1*BytesPerWord), (int32_t)NULL_WORD); 327 __ jcc(Assembler::notZero, L); 328 __ stop("locked object is NULL"); 329 __ bind(L); 330 } 331 #endif 332 __ movptr(rbx, Address(OSR_buf, slot_offset + 0)); 333 __ movptr(frame_map()->address_for_monitor_lock(i), rbx); 334 __ movptr(rbx, Address(OSR_buf, slot_offset + 1*BytesPerWord)); 335 __ movptr(frame_map()->address_for_monitor_object(i), rbx); 336 } 337 } 338 } 339 340 341 // inline cache check; done before the frame is built. 342 int LIR_Assembler::check_icache() { 343 Register receiver = FrameMap::receiver_opr->as_register(); 344 Register ic_klass = IC_Klass; 345 const int ic_cmp_size = LP64_ONLY(10) NOT_LP64(9); 346 const bool do_post_padding = VerifyOops || UseCompressedOops; 347 if (!do_post_padding) { 348 // insert some nops so that the verified entry point is aligned on CodeEntryAlignment 349 while ((__ offset() + ic_cmp_size) % CodeEntryAlignment != 0) { 350 __ nop(); 351 } 352 } 353 int offset = __ offset(); 354 __ inline_cache_check(receiver, IC_Klass); 355 assert(__ offset() % CodeEntryAlignment == 0 || do_post_padding, "alignment must be correct"); 356 if (do_post_padding) { 357 // force alignment after the cache check. 358 // It's been verified to be aligned if !VerifyOops 359 __ align(CodeEntryAlignment); 360 } 361 return offset; 362 } 363 364 365 void LIR_Assembler::jobject2reg_with_patching(Register reg, CodeEmitInfo* info) { 366 jobject o = NULL; 367 PatchingStub* patch = new PatchingStub(_masm, PatchingStub::load_klass_id); 368 __ movoop(reg, o); 369 patching_epilog(patch, lir_patch_normal, reg, info); 370 } 371 372 373 void LIR_Assembler::monitorexit(LIR_Opr obj_opr, LIR_Opr lock_opr, Register new_hdr, int monitor_no, Register exception) { 374 if (exception->is_valid()) { 375 // preserve exception 376 // note: the monitor_exit runtime call is a leaf routine 377 // and cannot block => no GC can happen 378 // The slow case (MonitorAccessStub) uses the first two stack slots 379 // ([esp+0] and [esp+4]), therefore we store the exception at [esp+8] 380 __ movptr (Address(rsp, 2*wordSize), exception); 381 } 382 383 Register obj_reg = obj_opr->as_register(); 384 Register lock_reg = lock_opr->as_register(); 385 386 // setup registers (lock_reg must be rax, for lock_object) 387 assert(obj_reg != SYNC_header && lock_reg != SYNC_header, "rax, must be available here"); 388 Register hdr = lock_reg; 389 assert(new_hdr == SYNC_header, "wrong register"); 390 lock_reg = new_hdr; 391 // compute pointer to BasicLock 392 Address lock_addr = frame_map()->address_for_monitor_lock(monitor_no); 393 __ lea(lock_reg, lock_addr); 394 // unlock object 395 MonitorAccessStub* slow_case = new MonitorExitStub(lock_opr, true, monitor_no); 396 // _slow_case_stubs->append(slow_case); 397 // temporary fix: must be created after exceptionhandler, therefore as call stub 398 _slow_case_stubs->append(slow_case); 399 if (UseFastLocking) { 400 // try inlined fast unlocking first, revert to slow locking if it fails 401 // note: lock_reg points to the displaced header since the displaced header offset is 0! 402 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header"); 403 __ unlock_object(hdr, obj_reg, lock_reg, *slow_case->entry()); 404 } else { 405 // always do slow unlocking 406 // note: the slow unlocking code could be inlined here, however if we use 407 // slow unlocking, speed doesn't matter anyway and this solution is 408 // simpler and requires less duplicated code - additionally, the 409 // slow unlocking code is the same in either case which simplifies 410 // debugging 411 __ jmp(*slow_case->entry()); 412 } 413 // done 414 __ bind(*slow_case->continuation()); 415 416 if (exception->is_valid()) { 417 // restore exception 418 __ movptr (exception, Address(rsp, 2 * wordSize)); 419 } 420 } 421 422 // This specifies the rsp decrement needed to build the frame 423 int LIR_Assembler::initial_frame_size_in_bytes() { 424 // if rounding, must let FrameMap know! 425 426 // The frame_map records size in slots (32bit word) 427 428 // subtract two words to account for return address and link 429 return (frame_map()->framesize() - (2*VMRegImpl::slots_per_word)) * VMRegImpl::stack_slot_size; 430 } 431 432 433 int LIR_Assembler::emit_exception_handler() { 434 // if the last instruction is a call (typically to do a throw which 435 // is coming at the end after block reordering) the return address 436 // must still point into the code area in order to avoid assertion 437 // failures when searching for the corresponding bci => add a nop 438 // (was bug 5/14/1999 - gri) 439 __ nop(); 440 441 // generate code for exception handler 442 address handler_base = __ start_a_stub(exception_handler_size); 443 if (handler_base == NULL) { 444 // not enough space left for the handler 445 bailout("exception handler overflow"); 446 return -1; 447 } 448 449 int offset = code_offset(); 450 451 // the exception oop and pc are in rax, and rdx 452 // no other registers need to be preserved, so invalidate them 453 __ invalidate_registers(false, true, true, false, true, true); 454 455 // check that there is really an exception 456 __ verify_not_null_oop(rax); 457 458 // search an exception handler (rax: exception oop, rdx: throwing pc) 459 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::handle_exception_from_callee_id))); 460 __ should_not_reach_here(); 461 assert(code_offset() - offset <= exception_handler_size, "overflow"); 462 __ end_a_stub(); 463 464 return offset; 465 } 466 467 468 // Emit the code to remove the frame from the stack in the exception 469 // unwind path. 470 int LIR_Assembler::emit_unwind_handler() { 471 #ifndef PRODUCT 472 if (CommentedAssembly) { 473 _masm->block_comment("Unwind handler"); 474 } 475 #endif 476 477 int offset = code_offset(); 478 479 // Fetch the exception from TLS and clear out exception related thread state 480 __ get_thread(rsi); 481 __ movptr(rax, Address(rsi, JavaThread::exception_oop_offset())); 482 __ movptr(Address(rsi, JavaThread::exception_oop_offset()), (int32_t)NULL_WORD); 483 __ movptr(Address(rsi, JavaThread::exception_pc_offset()), (int32_t)NULL_WORD); 484 485 __ bind(_unwind_handler_entry); 486 __ verify_not_null_oop(rax); 487 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) { 488 __ mov(rsi, rax); // Preserve the exception 489 } 490 491 // Preform needed unlocking 492 MonitorExitStub* stub = NULL; 493 if (method()->is_synchronized()) { 494 monitor_address(0, FrameMap::rax_opr); 495 stub = new MonitorExitStub(FrameMap::rax_opr, true, 0); 496 __ unlock_object(rdi, rbx, rax, *stub->entry()); 497 __ bind(*stub->continuation()); 498 } 499 500 if (compilation()->env()->dtrace_method_probes()) { 501 __ get_thread(rax); 502 __ movptr(Address(rsp, 0), rax); 503 __ movoop(Address(rsp, sizeof(void*)), method()->constant_encoding()); 504 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit))); 505 } 506 507 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) { 508 __ mov(rax, rsi); // Restore the exception 509 } 510 511 // remove the activation and dispatch to the unwind handler 512 __ remove_frame(initial_frame_size_in_bytes()); 513 __ jump(RuntimeAddress(Runtime1::entry_for(Runtime1::unwind_exception_id))); 514 515 // Emit the slow path assembly 516 if (stub != NULL) { 517 stub->emit_code(this); 518 } 519 520 return offset; 521 } 522 523 524 int LIR_Assembler::emit_deopt_handler() { 525 // if the last instruction is a call (typically to do a throw which 526 // is coming at the end after block reordering) the return address 527 // must still point into the code area in order to avoid assertion 528 // failures when searching for the corresponding bci => add a nop 529 // (was bug 5/14/1999 - gri) 530 __ nop(); 531 532 // generate code for exception handler 533 address handler_base = __ start_a_stub(deopt_handler_size); 534 if (handler_base == NULL) { 535 // not enough space left for the handler 536 bailout("deopt handler overflow"); 537 return -1; 538 } 539 540 int offset = code_offset(); 541 InternalAddress here(__ pc()); 542 543 __ pushptr(here.addr()); 544 __ jump(RuntimeAddress(SharedRuntime::deopt_blob()->unpack())); 545 546 assert(code_offset() - offset <= deopt_handler_size, "overflow"); 547 __ end_a_stub(); 548 549 return offset; 550 } 551 552 553 // This is the fast version of java.lang.String.compare; it has not 554 // OSR-entry and therefore, we generate a slow version for OSR's 555 void LIR_Assembler::emit_string_compare(LIR_Opr arg0, LIR_Opr arg1, LIR_Opr dst, CodeEmitInfo* info) { 556 __ movptr (rbx, rcx); // receiver is in rcx 557 __ movptr (rax, arg1->as_register()); 558 559 // Get addresses of first characters from both Strings 560 __ load_heap_oop(rsi, Address(rax, java_lang_String::value_offset_in_bytes())); 561 __ movptr (rcx, Address(rax, java_lang_String::offset_offset_in_bytes())); 562 __ lea (rsi, Address(rsi, rcx, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR))); 563 564 565 // rbx, may be NULL 566 add_debug_info_for_null_check_here(info); 567 __ load_heap_oop(rdi, Address(rbx, java_lang_String::value_offset_in_bytes())); 568 __ movptr (rcx, Address(rbx, java_lang_String::offset_offset_in_bytes())); 569 __ lea (rdi, Address(rdi, rcx, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR))); 570 571 // compute minimum length (in rax) and difference of lengths (on top of stack) 572 if (VM_Version::supports_cmov()) { 573 __ movl (rbx, Address(rbx, java_lang_String::count_offset_in_bytes())); 574 __ movl (rax, Address(rax, java_lang_String::count_offset_in_bytes())); 575 __ mov (rcx, rbx); 576 __ subptr (rbx, rax); // subtract lengths 577 __ push (rbx); // result 578 __ cmov (Assembler::lessEqual, rax, rcx); 579 } else { 580 Label L; 581 __ movl (rbx, Address(rbx, java_lang_String::count_offset_in_bytes())); 582 __ movl (rcx, Address(rax, java_lang_String::count_offset_in_bytes())); 583 __ mov (rax, rbx); 584 __ subptr (rbx, rcx); 585 __ push (rbx); 586 __ jcc (Assembler::lessEqual, L); 587 __ mov (rax, rcx); 588 __ bind (L); 589 } 590 // is minimum length 0? 591 Label noLoop, haveResult; 592 __ testptr (rax, rax); 593 __ jcc (Assembler::zero, noLoop); 594 595 // compare first characters 596 __ load_unsigned_short(rcx, Address(rdi, 0)); 597 __ load_unsigned_short(rbx, Address(rsi, 0)); 598 __ subl(rcx, rbx); 599 __ jcc(Assembler::notZero, haveResult); 600 // starting loop 601 __ decrement(rax); // we already tested index: skip one 602 __ jcc(Assembler::zero, noLoop); 603 604 // set rsi.edi to the end of the arrays (arrays have same length) 605 // negate the index 606 607 __ lea(rsi, Address(rsi, rax, Address::times_2, type2aelembytes(T_CHAR))); 608 __ lea(rdi, Address(rdi, rax, Address::times_2, type2aelembytes(T_CHAR))); 609 __ negptr(rax); 610 611 // compare the strings in a loop 612 613 Label loop; 614 __ align(wordSize); 615 __ bind(loop); 616 __ load_unsigned_short(rcx, Address(rdi, rax, Address::times_2, 0)); 617 __ load_unsigned_short(rbx, Address(rsi, rax, Address::times_2, 0)); 618 __ subl(rcx, rbx); 619 __ jcc(Assembler::notZero, haveResult); 620 __ increment(rax); 621 __ jcc(Assembler::notZero, loop); 622 623 // strings are equal up to min length 624 625 __ bind(noLoop); 626 __ pop(rax); 627 return_op(LIR_OprFact::illegalOpr); 628 629 __ bind(haveResult); 630 // leave instruction is going to discard the TOS value 631 __ mov (rax, rcx); // result of call is in rax, 632 } 633 634 635 void LIR_Assembler::return_op(LIR_Opr result) { 636 assert(result->is_illegal() || !result->is_single_cpu() || result->as_register() == rax, "word returns are in rax,"); 637 if (!result->is_illegal() && result->is_float_kind() && !result->is_xmm_register()) { 638 assert(result->fpu() == 0, "result must already be on TOS"); 639 } 640 641 // Pop the stack before the safepoint code 642 __ remove_frame(initial_frame_size_in_bytes()); 643 644 bool result_is_oop = result->is_valid() ? result->is_oop() : false; 645 646 // Note: we do not need to round double result; float result has the right precision 647 // the poll sets the condition code, but no data registers 648 AddressLiteral polling_page(os::get_polling_page() + (SafepointPollOffset % os::vm_page_size()), 649 relocInfo::poll_return_type); 650 651 // NOTE: the requires that the polling page be reachable else the reloc 652 // goes to the movq that loads the address and not the faulting instruction 653 // which breaks the signal handler code 654 655 __ test32(rax, polling_page); 656 657 __ ret(0); 658 } 659 660 661 int LIR_Assembler::safepoint_poll(LIR_Opr tmp, CodeEmitInfo* info) { 662 AddressLiteral polling_page(os::get_polling_page() + (SafepointPollOffset % os::vm_page_size()), 663 relocInfo::poll_type); 664 665 if (info != NULL) { 666 add_debug_info_for_branch(info); 667 } else { 668 ShouldNotReachHere(); 669 } 670 671 int offset = __ offset(); 672 673 // NOTE: the requires that the polling page be reachable else the reloc 674 // goes to the movq that loads the address and not the faulting instruction 675 // which breaks the signal handler code 676 677 __ test32(rax, polling_page); 678 return offset; 679 } 680 681 682 void LIR_Assembler::move_regs(Register from_reg, Register to_reg) { 683 if (from_reg != to_reg) __ mov(to_reg, from_reg); 684 } 685 686 void LIR_Assembler::swap_reg(Register a, Register b) { 687 __ xchgptr(a, b); 688 } 689 690 691 void LIR_Assembler::const2reg(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) { 692 assert(src->is_constant(), "should not call otherwise"); 693 assert(dest->is_register(), "should not call otherwise"); 694 LIR_Const* c = src->as_constant_ptr(); 695 696 switch (c->type()) { 697 case T_INT: { 698 assert(patch_code == lir_patch_none, "no patching handled here"); 699 __ movl(dest->as_register(), c->as_jint()); 700 break; 701 } 702 703 case T_ADDRESS: { 704 assert(patch_code == lir_patch_none, "no patching handled here"); 705 __ movptr(dest->as_register(), c->as_jint()); 706 break; 707 } 708 709 case T_LONG: { 710 assert(patch_code == lir_patch_none, "no patching handled here"); 711 #ifdef _LP64 712 __ movptr(dest->as_register_lo(), (intptr_t)c->as_jlong()); 713 #else 714 __ movptr(dest->as_register_lo(), c->as_jint_lo()); 715 __ movptr(dest->as_register_hi(), c->as_jint_hi()); 716 #endif // _LP64 717 break; 718 } 719 720 case T_OBJECT: { 721 if (patch_code != lir_patch_none) { 722 jobject2reg_with_patching(dest->as_register(), info); 723 } else { 724 __ movoop(dest->as_register(), c->as_jobject()); 725 } 726 break; 727 } 728 729 case T_FLOAT: { 730 if (dest->is_single_xmm()) { 731 if (c->is_zero_float()) { 732 __ xorps(dest->as_xmm_float_reg(), dest->as_xmm_float_reg()); 733 } else { 734 __ movflt(dest->as_xmm_float_reg(), 735 InternalAddress(float_constant(c->as_jfloat()))); 736 } 737 } else { 738 assert(dest->is_single_fpu(), "must be"); 739 assert(dest->fpu_regnr() == 0, "dest must be TOS"); 740 if (c->is_zero_float()) { 741 __ fldz(); 742 } else if (c->is_one_float()) { 743 __ fld1(); 744 } else { 745 __ fld_s (InternalAddress(float_constant(c->as_jfloat()))); 746 } 747 } 748 break; 749 } 750 751 case T_DOUBLE: { 752 if (dest->is_double_xmm()) { 753 if (c->is_zero_double()) { 754 __ xorpd(dest->as_xmm_double_reg(), dest->as_xmm_double_reg()); 755 } else { 756 __ movdbl(dest->as_xmm_double_reg(), 757 InternalAddress(double_constant(c->as_jdouble()))); 758 } 759 } else { 760 assert(dest->is_double_fpu(), "must be"); 761 assert(dest->fpu_regnrLo() == 0, "dest must be TOS"); 762 if (c->is_zero_double()) { 763 __ fldz(); 764 } else if (c->is_one_double()) { 765 __ fld1(); 766 } else { 767 __ fld_d (InternalAddress(double_constant(c->as_jdouble()))); 768 } 769 } 770 break; 771 } 772 773 default: 774 ShouldNotReachHere(); 775 } 776 } 777 778 void LIR_Assembler::const2stack(LIR_Opr src, LIR_Opr dest) { 779 assert(src->is_constant(), "should not call otherwise"); 780 assert(dest->is_stack(), "should not call otherwise"); 781 LIR_Const* c = src->as_constant_ptr(); 782 783 switch (c->type()) { 784 case T_INT: // fall through 785 case T_FLOAT: 786 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits()); 787 break; 788 789 case T_ADDRESS: 790 __ movptr(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits()); 791 break; 792 793 case T_OBJECT: 794 __ movoop(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jobject()); 795 break; 796 797 case T_LONG: // fall through 798 case T_DOUBLE: 799 #ifdef _LP64 800 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(), 801 lo_word_offset_in_bytes), (intptr_t)c->as_jlong_bits()); 802 #else 803 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(), 804 lo_word_offset_in_bytes), c->as_jint_lo_bits()); 805 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(), 806 hi_word_offset_in_bytes), c->as_jint_hi_bits()); 807 #endif // _LP64 808 break; 809 810 default: 811 ShouldNotReachHere(); 812 } 813 } 814 815 void LIR_Assembler::const2mem(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info, bool wide) { 816 assert(src->is_constant(), "should not call otherwise"); 817 assert(dest->is_address(), "should not call otherwise"); 818 LIR_Const* c = src->as_constant_ptr(); 819 LIR_Address* addr = dest->as_address_ptr(); 820 821 int null_check_here = code_offset(); 822 switch (type) { 823 case T_INT: // fall through 824 case T_FLOAT: 825 __ movl(as_Address(addr), c->as_jint_bits()); 826 break; 827 828 case T_ADDRESS: 829 __ movptr(as_Address(addr), c->as_jint_bits()); 830 break; 831 832 case T_OBJECT: // fall through 833 case T_ARRAY: 834 if (c->as_jobject() == NULL) { 835 if (UseCompressedOops && !wide) { 836 __ movl(as_Address(addr), (int32_t)NULL_WORD); 837 } else { 838 __ movptr(as_Address(addr), NULL_WORD); 839 } 840 } else { 841 if (is_literal_address(addr)) { 842 ShouldNotReachHere(); 843 __ movoop(as_Address(addr, noreg), c->as_jobject()); 844 } else { 845 #ifdef _LP64 846 __ movoop(rscratch1, c->as_jobject()); 847 if (UseCompressedOops && !wide) { 848 __ encode_heap_oop(rscratch1); 849 null_check_here = code_offset(); 850 __ movl(as_Address_lo(addr), rscratch1); 851 } else { 852 null_check_here = code_offset(); 853 __ movptr(as_Address_lo(addr), rscratch1); 854 } 855 #else 856 __ movoop(as_Address(addr), c->as_jobject()); 857 #endif 858 } 859 } 860 break; 861 862 case T_LONG: // fall through 863 case T_DOUBLE: 864 #ifdef _LP64 865 if (is_literal_address(addr)) { 866 ShouldNotReachHere(); 867 __ movptr(as_Address(addr, r15_thread), (intptr_t)c->as_jlong_bits()); 868 } else { 869 __ movptr(r10, (intptr_t)c->as_jlong_bits()); 870 null_check_here = code_offset(); 871 __ movptr(as_Address_lo(addr), r10); 872 } 873 #else 874 // Always reachable in 32bit so this doesn't produce useless move literal 875 __ movptr(as_Address_hi(addr), c->as_jint_hi_bits()); 876 __ movptr(as_Address_lo(addr), c->as_jint_lo_bits()); 877 #endif // _LP64 878 break; 879 880 case T_BOOLEAN: // fall through 881 case T_BYTE: 882 __ movb(as_Address(addr), c->as_jint() & 0xFF); 883 break; 884 885 case T_CHAR: // fall through 886 case T_SHORT: 887 __ movw(as_Address(addr), c->as_jint() & 0xFFFF); 888 break; 889 890 default: 891 ShouldNotReachHere(); 892 }; 893 894 if (info != NULL) { 895 add_debug_info_for_null_check(null_check_here, info); 896 } 897 } 898 899 900 void LIR_Assembler::reg2reg(LIR_Opr src, LIR_Opr dest) { 901 assert(src->is_register(), "should not call otherwise"); 902 assert(dest->is_register(), "should not call otherwise"); 903 904 // move between cpu-registers 905 if (dest->is_single_cpu()) { 906 #ifdef _LP64 907 if (src->type() == T_LONG) { 908 // Can do LONG -> OBJECT 909 move_regs(src->as_register_lo(), dest->as_register()); 910 return; 911 } 912 #endif 913 assert(src->is_single_cpu(), "must match"); 914 if (src->type() == T_OBJECT) { 915 __ verify_oop(src->as_register()); 916 } 917 move_regs(src->as_register(), dest->as_register()); 918 919 } else if (dest->is_double_cpu()) { 920 #ifdef _LP64 921 if (src->type() == T_OBJECT || src->type() == T_ARRAY) { 922 // Surprising to me but we can see move of a long to t_object 923 __ verify_oop(src->as_register()); 924 move_regs(src->as_register(), dest->as_register_lo()); 925 return; 926 } 927 #endif 928 assert(src->is_double_cpu(), "must match"); 929 Register f_lo = src->as_register_lo(); 930 Register f_hi = src->as_register_hi(); 931 Register t_lo = dest->as_register_lo(); 932 Register t_hi = dest->as_register_hi(); 933 #ifdef _LP64 934 assert(f_hi == f_lo, "must be same"); 935 assert(t_hi == t_lo, "must be same"); 936 move_regs(f_lo, t_lo); 937 #else 938 assert(f_lo != f_hi && t_lo != t_hi, "invalid register allocation"); 939 940 941 if (f_lo == t_hi && f_hi == t_lo) { 942 swap_reg(f_lo, f_hi); 943 } else if (f_hi == t_lo) { 944 assert(f_lo != t_hi, "overwriting register"); 945 move_regs(f_hi, t_hi); 946 move_regs(f_lo, t_lo); 947 } else { 948 assert(f_hi != t_lo, "overwriting register"); 949 move_regs(f_lo, t_lo); 950 move_regs(f_hi, t_hi); 951 } 952 #endif // LP64 953 954 // special moves from fpu-register to xmm-register 955 // necessary for method results 956 } else if (src->is_single_xmm() && !dest->is_single_xmm()) { 957 __ movflt(Address(rsp, 0), src->as_xmm_float_reg()); 958 __ fld_s(Address(rsp, 0)); 959 } else if (src->is_double_xmm() && !dest->is_double_xmm()) { 960 __ movdbl(Address(rsp, 0), src->as_xmm_double_reg()); 961 __ fld_d(Address(rsp, 0)); 962 } else if (dest->is_single_xmm() && !src->is_single_xmm()) { 963 __ fstp_s(Address(rsp, 0)); 964 __ movflt(dest->as_xmm_float_reg(), Address(rsp, 0)); 965 } else if (dest->is_double_xmm() && !src->is_double_xmm()) { 966 __ fstp_d(Address(rsp, 0)); 967 __ movdbl(dest->as_xmm_double_reg(), Address(rsp, 0)); 968 969 // move between xmm-registers 970 } else if (dest->is_single_xmm()) { 971 assert(src->is_single_xmm(), "must match"); 972 __ movflt(dest->as_xmm_float_reg(), src->as_xmm_float_reg()); 973 } else if (dest->is_double_xmm()) { 974 assert(src->is_double_xmm(), "must match"); 975 __ movdbl(dest->as_xmm_double_reg(), src->as_xmm_double_reg()); 976 977 // move between fpu-registers (no instruction necessary because of fpu-stack) 978 } else if (dest->is_single_fpu() || dest->is_double_fpu()) { 979 assert(src->is_single_fpu() || src->is_double_fpu(), "must match"); 980 assert(src->fpu() == dest->fpu(), "currently should be nothing to do"); 981 } else { 982 ShouldNotReachHere(); 983 } 984 } 985 986 void LIR_Assembler::reg2stack(LIR_Opr src, LIR_Opr dest, BasicType type, bool pop_fpu_stack) { 987 assert(src->is_register(), "should not call otherwise"); 988 assert(dest->is_stack(), "should not call otherwise"); 989 990 if (src->is_single_cpu()) { 991 Address dst = frame_map()->address_for_slot(dest->single_stack_ix()); 992 if (type == T_OBJECT || type == T_ARRAY) { 993 __ verify_oop(src->as_register()); 994 __ movptr (dst, src->as_register()); 995 } else { 996 __ movl (dst, src->as_register()); 997 } 998 999 } else if (src->is_double_cpu()) { 1000 Address dstLO = frame_map()->address_for_slot(dest->double_stack_ix(), lo_word_offset_in_bytes); 1001 Address dstHI = frame_map()->address_for_slot(dest->double_stack_ix(), hi_word_offset_in_bytes); 1002 __ movptr (dstLO, src->as_register_lo()); 1003 NOT_LP64(__ movptr (dstHI, src->as_register_hi())); 1004 1005 } else if (src->is_single_xmm()) { 1006 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix()); 1007 __ movflt(dst_addr, src->as_xmm_float_reg()); 1008 1009 } else if (src->is_double_xmm()) { 1010 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix()); 1011 __ movdbl(dst_addr, src->as_xmm_double_reg()); 1012 1013 } else if (src->is_single_fpu()) { 1014 assert(src->fpu_regnr() == 0, "argument must be on TOS"); 1015 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix()); 1016 if (pop_fpu_stack) __ fstp_s (dst_addr); 1017 else __ fst_s (dst_addr); 1018 1019 } else if (src->is_double_fpu()) { 1020 assert(src->fpu_regnrLo() == 0, "argument must be on TOS"); 1021 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix()); 1022 if (pop_fpu_stack) __ fstp_d (dst_addr); 1023 else __ fst_d (dst_addr); 1024 1025 } else { 1026 ShouldNotReachHere(); 1027 } 1028 } 1029 1030 1031 void LIR_Assembler::reg2mem(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool pop_fpu_stack, bool wide, bool /* unaligned */) { 1032 LIR_Address* to_addr = dest->as_address_ptr(); 1033 PatchingStub* patch = NULL; 1034 Register compressed_src = rscratch1; 1035 1036 if (type == T_ARRAY || type == T_OBJECT) { 1037 __ verify_oop(src->as_register()); 1038 #ifdef _LP64 1039 if (UseCompressedOops && !wide) { 1040 __ movptr(compressed_src, src->as_register()); 1041 __ encode_heap_oop(compressed_src); 1042 } 1043 #endif 1044 } 1045 1046 if (patch_code != lir_patch_none) { 1047 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1048 Address toa = as_Address(to_addr); 1049 assert(toa.disp() != 0, "must have"); 1050 } 1051 1052 int null_check_here = code_offset(); 1053 switch (type) { 1054 case T_FLOAT: { 1055 if (src->is_single_xmm()) { 1056 __ movflt(as_Address(to_addr), src->as_xmm_float_reg()); 1057 } else { 1058 assert(src->is_single_fpu(), "must be"); 1059 assert(src->fpu_regnr() == 0, "argument must be on TOS"); 1060 if (pop_fpu_stack) __ fstp_s(as_Address(to_addr)); 1061 else __ fst_s (as_Address(to_addr)); 1062 } 1063 break; 1064 } 1065 1066 case T_DOUBLE: { 1067 if (src->is_double_xmm()) { 1068 __ movdbl(as_Address(to_addr), src->as_xmm_double_reg()); 1069 } else { 1070 assert(src->is_double_fpu(), "must be"); 1071 assert(src->fpu_regnrLo() == 0, "argument must be on TOS"); 1072 if (pop_fpu_stack) __ fstp_d(as_Address(to_addr)); 1073 else __ fst_d (as_Address(to_addr)); 1074 } 1075 break; 1076 } 1077 1078 case T_ARRAY: // fall through 1079 case T_OBJECT: // fall through 1080 if (UseCompressedOops && !wide) { 1081 __ movl(as_Address(to_addr), compressed_src); 1082 } else { 1083 __ movptr(as_Address(to_addr), src->as_register()); 1084 } 1085 break; 1086 case T_ADDRESS: 1087 __ movptr(as_Address(to_addr), src->as_register()); 1088 break; 1089 case T_INT: 1090 __ movl(as_Address(to_addr), src->as_register()); 1091 break; 1092 1093 case T_LONG: { 1094 Register from_lo = src->as_register_lo(); 1095 Register from_hi = src->as_register_hi(); 1096 #ifdef _LP64 1097 __ movptr(as_Address_lo(to_addr), from_lo); 1098 #else 1099 Register base = to_addr->base()->as_register(); 1100 Register index = noreg; 1101 if (to_addr->index()->is_register()) { 1102 index = to_addr->index()->as_register(); 1103 } 1104 if (base == from_lo || index == from_lo) { 1105 assert(base != from_hi, "can't be"); 1106 assert(index == noreg || (index != base && index != from_hi), "can't handle this"); 1107 __ movl(as_Address_hi(to_addr), from_hi); 1108 if (patch != NULL) { 1109 patching_epilog(patch, lir_patch_high, base, info); 1110 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1111 patch_code = lir_patch_low; 1112 } 1113 __ movl(as_Address_lo(to_addr), from_lo); 1114 } else { 1115 assert(index == noreg || (index != base && index != from_lo), "can't handle this"); 1116 __ movl(as_Address_lo(to_addr), from_lo); 1117 if (patch != NULL) { 1118 patching_epilog(patch, lir_patch_low, base, info); 1119 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1120 patch_code = lir_patch_high; 1121 } 1122 __ movl(as_Address_hi(to_addr), from_hi); 1123 } 1124 #endif // _LP64 1125 break; 1126 } 1127 1128 case T_BYTE: // fall through 1129 case T_BOOLEAN: { 1130 Register src_reg = src->as_register(); 1131 Address dst_addr = as_Address(to_addr); 1132 assert(VM_Version::is_P6() || src_reg->has_byte_register(), "must use byte registers if not P6"); 1133 __ movb(dst_addr, src_reg); 1134 break; 1135 } 1136 1137 case T_CHAR: // fall through 1138 case T_SHORT: 1139 __ movw(as_Address(to_addr), src->as_register()); 1140 break; 1141 1142 default: 1143 ShouldNotReachHere(); 1144 } 1145 if (info != NULL) { 1146 add_debug_info_for_null_check(null_check_here, info); 1147 } 1148 1149 if (patch_code != lir_patch_none) { 1150 patching_epilog(patch, patch_code, to_addr->base()->as_register(), info); 1151 } 1152 } 1153 1154 1155 void LIR_Assembler::stack2reg(LIR_Opr src, LIR_Opr dest, BasicType type) { 1156 assert(src->is_stack(), "should not call otherwise"); 1157 assert(dest->is_register(), "should not call otherwise"); 1158 1159 if (dest->is_single_cpu()) { 1160 if (type == T_ARRAY || type == T_OBJECT) { 1161 __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix())); 1162 __ verify_oop(dest->as_register()); 1163 } else { 1164 __ movl(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix())); 1165 } 1166 1167 } else if (dest->is_double_cpu()) { 1168 Address src_addr_LO = frame_map()->address_for_slot(src->double_stack_ix(), lo_word_offset_in_bytes); 1169 Address src_addr_HI = frame_map()->address_for_slot(src->double_stack_ix(), hi_word_offset_in_bytes); 1170 __ movptr(dest->as_register_lo(), src_addr_LO); 1171 NOT_LP64(__ movptr(dest->as_register_hi(), src_addr_HI)); 1172 1173 } else if (dest->is_single_xmm()) { 1174 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix()); 1175 __ movflt(dest->as_xmm_float_reg(), src_addr); 1176 1177 } else if (dest->is_double_xmm()) { 1178 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix()); 1179 __ movdbl(dest->as_xmm_double_reg(), src_addr); 1180 1181 } else if (dest->is_single_fpu()) { 1182 assert(dest->fpu_regnr() == 0, "dest must be TOS"); 1183 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix()); 1184 __ fld_s(src_addr); 1185 1186 } else if (dest->is_double_fpu()) { 1187 assert(dest->fpu_regnrLo() == 0, "dest must be TOS"); 1188 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix()); 1189 __ fld_d(src_addr); 1190 1191 } else { 1192 ShouldNotReachHere(); 1193 } 1194 } 1195 1196 1197 void LIR_Assembler::stack2stack(LIR_Opr src, LIR_Opr dest, BasicType type) { 1198 if (src->is_single_stack()) { 1199 if (type == T_OBJECT || type == T_ARRAY) { 1200 __ pushptr(frame_map()->address_for_slot(src ->single_stack_ix())); 1201 __ popptr (frame_map()->address_for_slot(dest->single_stack_ix())); 1202 } else { 1203 #ifndef _LP64 1204 __ pushl(frame_map()->address_for_slot(src ->single_stack_ix())); 1205 __ popl (frame_map()->address_for_slot(dest->single_stack_ix())); 1206 #else 1207 //no pushl on 64bits 1208 __ movl(rscratch1, frame_map()->address_for_slot(src ->single_stack_ix())); 1209 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), rscratch1); 1210 #endif 1211 } 1212 1213 } else if (src->is_double_stack()) { 1214 #ifdef _LP64 1215 __ pushptr(frame_map()->address_for_slot(src ->double_stack_ix())); 1216 __ popptr (frame_map()->address_for_slot(dest->double_stack_ix())); 1217 #else 1218 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 0)); 1219 // push and pop the part at src + wordSize, adding wordSize for the previous push 1220 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 2 * wordSize)); 1221 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 2 * wordSize)); 1222 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 0)); 1223 #endif // _LP64 1224 1225 } else { 1226 ShouldNotReachHere(); 1227 } 1228 } 1229 1230 1231 void LIR_Assembler::mem2reg(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool wide, bool /* unaligned */) { 1232 assert(src->is_address(), "should not call otherwise"); 1233 assert(dest->is_register(), "should not call otherwise"); 1234 1235 LIR_Address* addr = src->as_address_ptr(); 1236 Address from_addr = as_Address(addr); 1237 1238 switch (type) { 1239 case T_BOOLEAN: // fall through 1240 case T_BYTE: // fall through 1241 case T_CHAR: // fall through 1242 case T_SHORT: 1243 if (!VM_Version::is_P6() && !from_addr.uses(dest->as_register())) { 1244 // on pre P6 processors we may get partial register stalls 1245 // so blow away the value of to_rinfo before loading a 1246 // partial word into it. Do it here so that it precedes 1247 // the potential patch point below. 1248 __ xorptr(dest->as_register(), dest->as_register()); 1249 } 1250 break; 1251 } 1252 1253 PatchingStub* patch = NULL; 1254 if (patch_code != lir_patch_none) { 1255 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1256 assert(from_addr.disp() != 0, "must have"); 1257 } 1258 if (info != NULL) { 1259 add_debug_info_for_null_check_here(info); 1260 } 1261 1262 switch (type) { 1263 case T_FLOAT: { 1264 if (dest->is_single_xmm()) { 1265 __ movflt(dest->as_xmm_float_reg(), from_addr); 1266 } else { 1267 assert(dest->is_single_fpu(), "must be"); 1268 assert(dest->fpu_regnr() == 0, "dest must be TOS"); 1269 __ fld_s(from_addr); 1270 } 1271 break; 1272 } 1273 1274 case T_DOUBLE: { 1275 if (dest->is_double_xmm()) { 1276 __ movdbl(dest->as_xmm_double_reg(), from_addr); 1277 } else { 1278 assert(dest->is_double_fpu(), "must be"); 1279 assert(dest->fpu_regnrLo() == 0, "dest must be TOS"); 1280 __ fld_d(from_addr); 1281 } 1282 break; 1283 } 1284 1285 case T_OBJECT: // fall through 1286 case T_ARRAY: // fall through 1287 if (UseCompressedOops && !wide) { 1288 __ movl(dest->as_register(), from_addr); 1289 } else { 1290 __ movptr(dest->as_register(), from_addr); 1291 } 1292 break; 1293 1294 case T_ADDRESS: 1295 __ movptr(dest->as_register(), from_addr); 1296 break; 1297 case T_INT: 1298 __ movl(dest->as_register(), from_addr); 1299 break; 1300 1301 case T_LONG: { 1302 Register to_lo = dest->as_register_lo(); 1303 Register to_hi = dest->as_register_hi(); 1304 #ifdef _LP64 1305 __ movptr(to_lo, as_Address_lo(addr)); 1306 #else 1307 Register base = addr->base()->as_register(); 1308 Register index = noreg; 1309 if (addr->index()->is_register()) { 1310 index = addr->index()->as_register(); 1311 } 1312 if ((base == to_lo && index == to_hi) || 1313 (base == to_hi && index == to_lo)) { 1314 // addresses with 2 registers are only formed as a result of 1315 // array access so this code will never have to deal with 1316 // patches or null checks. 1317 assert(info == NULL && patch == NULL, "must be"); 1318 __ lea(to_hi, as_Address(addr)); 1319 __ movl(to_lo, Address(to_hi, 0)); 1320 __ movl(to_hi, Address(to_hi, BytesPerWord)); 1321 } else if (base == to_lo || index == to_lo) { 1322 assert(base != to_hi, "can't be"); 1323 assert(index == noreg || (index != base && index != to_hi), "can't handle this"); 1324 __ movl(to_hi, as_Address_hi(addr)); 1325 if (patch != NULL) { 1326 patching_epilog(patch, lir_patch_high, base, info); 1327 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1328 patch_code = lir_patch_low; 1329 } 1330 __ movl(to_lo, as_Address_lo(addr)); 1331 } else { 1332 assert(index == noreg || (index != base && index != to_lo), "can't handle this"); 1333 __ movl(to_lo, as_Address_lo(addr)); 1334 if (patch != NULL) { 1335 patching_epilog(patch, lir_patch_low, base, info); 1336 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1337 patch_code = lir_patch_high; 1338 } 1339 __ movl(to_hi, as_Address_hi(addr)); 1340 } 1341 #endif // _LP64 1342 break; 1343 } 1344 1345 case T_BOOLEAN: // fall through 1346 case T_BYTE: { 1347 Register dest_reg = dest->as_register(); 1348 assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6"); 1349 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) { 1350 __ movsbl(dest_reg, from_addr); 1351 } else { 1352 __ movb(dest_reg, from_addr); 1353 __ shll(dest_reg, 24); 1354 __ sarl(dest_reg, 24); 1355 } 1356 break; 1357 } 1358 1359 case T_CHAR: { 1360 Register dest_reg = dest->as_register(); 1361 assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6"); 1362 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) { 1363 __ movzwl(dest_reg, from_addr); 1364 } else { 1365 __ movw(dest_reg, from_addr); 1366 } 1367 break; 1368 } 1369 1370 case T_SHORT: { 1371 Register dest_reg = dest->as_register(); 1372 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) { 1373 __ movswl(dest_reg, from_addr); 1374 } else { 1375 __ movw(dest_reg, from_addr); 1376 __ shll(dest_reg, 16); 1377 __ sarl(dest_reg, 16); 1378 } 1379 break; 1380 } 1381 1382 default: 1383 ShouldNotReachHere(); 1384 } 1385 1386 if (patch != NULL) { 1387 patching_epilog(patch, patch_code, addr->base()->as_register(), info); 1388 } 1389 1390 if (type == T_ARRAY || type == T_OBJECT) { 1391 #ifdef _LP64 1392 if (UseCompressedOops && !wide) { 1393 __ decode_heap_oop(dest->as_register()); 1394 } 1395 #endif 1396 __ verify_oop(dest->as_register()); 1397 } 1398 } 1399 1400 1401 void LIR_Assembler::prefetchr(LIR_Opr src) { 1402 LIR_Address* addr = src->as_address_ptr(); 1403 Address from_addr = as_Address(addr); 1404 1405 if (VM_Version::supports_sse()) { 1406 switch (ReadPrefetchInstr) { 1407 case 0: 1408 __ prefetchnta(from_addr); break; 1409 case 1: 1410 __ prefetcht0(from_addr); break; 1411 case 2: 1412 __ prefetcht2(from_addr); break; 1413 default: 1414 ShouldNotReachHere(); break; 1415 } 1416 } else if (VM_Version::supports_3dnow()) { 1417 __ prefetchr(from_addr); 1418 } 1419 } 1420 1421 1422 void LIR_Assembler::prefetchw(LIR_Opr src) { 1423 LIR_Address* addr = src->as_address_ptr(); 1424 Address from_addr = as_Address(addr); 1425 1426 if (VM_Version::supports_sse()) { 1427 switch (AllocatePrefetchInstr) { 1428 case 0: 1429 __ prefetchnta(from_addr); break; 1430 case 1: 1431 __ prefetcht0(from_addr); break; 1432 case 2: 1433 __ prefetcht2(from_addr); break; 1434 case 3: 1435 __ prefetchw(from_addr); break; 1436 default: 1437 ShouldNotReachHere(); break; 1438 } 1439 } else if (VM_Version::supports_3dnow()) { 1440 __ prefetchw(from_addr); 1441 } 1442 } 1443 1444 1445 NEEDS_CLEANUP; // This could be static? 1446 Address::ScaleFactor LIR_Assembler::array_element_size(BasicType type) const { 1447 int elem_size = type2aelembytes(type); 1448 switch (elem_size) { 1449 case 1: return Address::times_1; 1450 case 2: return Address::times_2; 1451 case 4: return Address::times_4; 1452 case 8: return Address::times_8; 1453 } 1454 ShouldNotReachHere(); 1455 return Address::no_scale; 1456 } 1457 1458 1459 void LIR_Assembler::emit_op3(LIR_Op3* op) { 1460 switch (op->code()) { 1461 case lir_idiv: 1462 case lir_irem: 1463 arithmetic_idiv(op->code(), 1464 op->in_opr1(), 1465 op->in_opr2(), 1466 op->in_opr3(), 1467 op->result_opr(), 1468 op->info()); 1469 break; 1470 default: ShouldNotReachHere(); break; 1471 } 1472 } 1473 1474 void LIR_Assembler::emit_opBranch(LIR_OpBranch* op) { 1475 #ifdef ASSERT 1476 assert(op->block() == NULL || op->block()->label() == op->label(), "wrong label"); 1477 if (op->block() != NULL) _branch_target_blocks.append(op->block()); 1478 if (op->ublock() != NULL) _branch_target_blocks.append(op->ublock()); 1479 #endif 1480 1481 if (op->cond() == lir_cond_always) { 1482 if (op->info() != NULL) add_debug_info_for_branch(op->info()); 1483 __ jmp (*(op->label())); 1484 } else { 1485 Assembler::Condition acond = Assembler::zero; 1486 if (op->code() == lir_cond_float_branch) { 1487 assert(op->ublock() != NULL, "must have unordered successor"); 1488 __ jcc(Assembler::parity, *(op->ublock()->label())); 1489 switch(op->cond()) { 1490 case lir_cond_equal: acond = Assembler::equal; break; 1491 case lir_cond_notEqual: acond = Assembler::notEqual; break; 1492 case lir_cond_less: acond = Assembler::below; break; 1493 case lir_cond_lessEqual: acond = Assembler::belowEqual; break; 1494 case lir_cond_greaterEqual: acond = Assembler::aboveEqual; break; 1495 case lir_cond_greater: acond = Assembler::above; break; 1496 default: ShouldNotReachHere(); 1497 } 1498 } else { 1499 switch (op->cond()) { 1500 case lir_cond_equal: acond = Assembler::equal; break; 1501 case lir_cond_notEqual: acond = Assembler::notEqual; break; 1502 case lir_cond_less: acond = Assembler::less; break; 1503 case lir_cond_lessEqual: acond = Assembler::lessEqual; break; 1504 case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break; 1505 case lir_cond_greater: acond = Assembler::greater; break; 1506 case lir_cond_belowEqual: acond = Assembler::belowEqual; break; 1507 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; break; 1508 default: ShouldNotReachHere(); 1509 } 1510 } 1511 __ jcc(acond,*(op->label())); 1512 } 1513 } 1514 1515 void LIR_Assembler::emit_opConvert(LIR_OpConvert* op) { 1516 LIR_Opr src = op->in_opr(); 1517 LIR_Opr dest = op->result_opr(); 1518 1519 switch (op->bytecode()) { 1520 case Bytecodes::_i2l: 1521 #ifdef _LP64 1522 __ movl2ptr(dest->as_register_lo(), src->as_register()); 1523 #else 1524 move_regs(src->as_register(), dest->as_register_lo()); 1525 move_regs(src->as_register(), dest->as_register_hi()); 1526 __ sarl(dest->as_register_hi(), 31); 1527 #endif // LP64 1528 break; 1529 1530 case Bytecodes::_l2i: 1531 move_regs(src->as_register_lo(), dest->as_register()); 1532 break; 1533 1534 case Bytecodes::_i2b: 1535 move_regs(src->as_register(), dest->as_register()); 1536 __ sign_extend_byte(dest->as_register()); 1537 break; 1538 1539 case Bytecodes::_i2c: 1540 move_regs(src->as_register(), dest->as_register()); 1541 __ andl(dest->as_register(), 0xFFFF); 1542 break; 1543 1544 case Bytecodes::_i2s: 1545 move_regs(src->as_register(), dest->as_register()); 1546 __ sign_extend_short(dest->as_register()); 1547 break; 1548 1549 1550 case Bytecodes::_f2d: 1551 case Bytecodes::_d2f: 1552 if (dest->is_single_xmm()) { 1553 __ cvtsd2ss(dest->as_xmm_float_reg(), src->as_xmm_double_reg()); 1554 } else if (dest->is_double_xmm()) { 1555 __ cvtss2sd(dest->as_xmm_double_reg(), src->as_xmm_float_reg()); 1556 } else { 1557 assert(src->fpu() == dest->fpu(), "register must be equal"); 1558 // do nothing (float result is rounded later through spilling) 1559 } 1560 break; 1561 1562 case Bytecodes::_i2f: 1563 case Bytecodes::_i2d: 1564 if (dest->is_single_xmm()) { 1565 __ cvtsi2ssl(dest->as_xmm_float_reg(), src->as_register()); 1566 } else if (dest->is_double_xmm()) { 1567 __ cvtsi2sdl(dest->as_xmm_double_reg(), src->as_register()); 1568 } else { 1569 assert(dest->fpu() == 0, "result must be on TOS"); 1570 __ movl(Address(rsp, 0), src->as_register()); 1571 __ fild_s(Address(rsp, 0)); 1572 } 1573 break; 1574 1575 case Bytecodes::_f2i: 1576 case Bytecodes::_d2i: 1577 if (src->is_single_xmm()) { 1578 __ cvttss2sil(dest->as_register(), src->as_xmm_float_reg()); 1579 } else if (src->is_double_xmm()) { 1580 __ cvttsd2sil(dest->as_register(), src->as_xmm_double_reg()); 1581 } else { 1582 assert(src->fpu() == 0, "input must be on TOS"); 1583 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_trunc())); 1584 __ fist_s(Address(rsp, 0)); 1585 __ movl(dest->as_register(), Address(rsp, 0)); 1586 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); 1587 } 1588 1589 // IA32 conversion instructions do not match JLS for overflow, underflow and NaN -> fixup in stub 1590 assert(op->stub() != NULL, "stub required"); 1591 __ cmpl(dest->as_register(), 0x80000000); 1592 __ jcc(Assembler::equal, *op->stub()->entry()); 1593 __ bind(*op->stub()->continuation()); 1594 break; 1595 1596 case Bytecodes::_l2f: 1597 case Bytecodes::_l2d: 1598 assert(!dest->is_xmm_register(), "result in xmm register not supported (no SSE instruction present)"); 1599 assert(dest->fpu() == 0, "result must be on TOS"); 1600 1601 __ movptr(Address(rsp, 0), src->as_register_lo()); 1602 NOT_LP64(__ movl(Address(rsp, BytesPerWord), src->as_register_hi())); 1603 __ fild_d(Address(rsp, 0)); 1604 // float result is rounded later through spilling 1605 break; 1606 1607 case Bytecodes::_f2l: 1608 case Bytecodes::_d2l: 1609 assert(!src->is_xmm_register(), "input in xmm register not supported (no SSE instruction present)"); 1610 assert(src->fpu() == 0, "input must be on TOS"); 1611 assert(dest == FrameMap::long0_opr, "runtime stub places result in these registers"); 1612 1613 // instruction sequence too long to inline it here 1614 { 1615 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::fpu2long_stub_id))); 1616 } 1617 break; 1618 1619 default: ShouldNotReachHere(); 1620 } 1621 } 1622 1623 void LIR_Assembler::emit_alloc_obj(LIR_OpAllocObj* op) { 1624 if (op->init_check()) { 1625 __ cmpl(Address(op->klass()->as_register(), 1626 instanceKlass::init_state_offset_in_bytes() + sizeof(oopDesc)), 1627 instanceKlass::fully_initialized); 1628 add_debug_info_for_null_check_here(op->stub()->info()); 1629 __ jcc(Assembler::notEqual, *op->stub()->entry()); 1630 } 1631 __ allocate_object(op->obj()->as_register(), 1632 op->tmp1()->as_register(), 1633 op->tmp2()->as_register(), 1634 op->header_size(), 1635 op->object_size(), 1636 op->klass()->as_register(), 1637 *op->stub()->entry()); 1638 __ bind(*op->stub()->continuation()); 1639 } 1640 1641 void LIR_Assembler::emit_alloc_array(LIR_OpAllocArray* op) { 1642 Register len = op->len()->as_register(); 1643 LP64_ONLY( __ movslq(len, len); ) 1644 1645 if (UseSlowPath || 1646 (!UseFastNewObjectArray && (op->type() == T_OBJECT || op->type() == T_ARRAY)) || 1647 (!UseFastNewTypeArray && (op->type() != T_OBJECT && op->type() != T_ARRAY))) { 1648 __ jmp(*op->stub()->entry()); 1649 } else { 1650 Register tmp1 = op->tmp1()->as_register(); 1651 Register tmp2 = op->tmp2()->as_register(); 1652 Register tmp3 = op->tmp3()->as_register(); 1653 if (len == tmp1) { 1654 tmp1 = tmp3; 1655 } else if (len == tmp2) { 1656 tmp2 = tmp3; 1657 } else if (len == tmp3) { 1658 // everything is ok 1659 } else { 1660 __ mov(tmp3, len); 1661 } 1662 __ allocate_array(op->obj()->as_register(), 1663 len, 1664 tmp1, 1665 tmp2, 1666 arrayOopDesc::header_size(op->type()), 1667 array_element_size(op->type()), 1668 op->klass()->as_register(), 1669 *op->stub()->entry()); 1670 } 1671 __ bind(*op->stub()->continuation()); 1672 } 1673 1674 void LIR_Assembler::type_profile_helper(Register mdo, 1675 ciMethodData *md, ciProfileData *data, 1676 Register recv, Label* update_done) { 1677 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) { 1678 Label next_test; 1679 // See if the receiver is receiver[n]. 1680 __ cmpptr(recv, Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i)))); 1681 __ jccb(Assembler::notEqual, next_test); 1682 Address data_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i))); 1683 __ addptr(data_addr, DataLayout::counter_increment); 1684 __ jmp(*update_done); 1685 __ bind(next_test); 1686 } 1687 1688 // Didn't find receiver; find next empty slot and fill it in 1689 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) { 1690 Label next_test; 1691 Address recv_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i))); 1692 __ cmpptr(recv_addr, (intptr_t)NULL_WORD); 1693 __ jccb(Assembler::notEqual, next_test); 1694 __ movptr(recv_addr, recv); 1695 __ movptr(Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i))), DataLayout::counter_increment); 1696 __ jmp(*update_done); 1697 __ bind(next_test); 1698 } 1699 } 1700 1701 void LIR_Assembler::emit_typecheck_helper(LIR_OpTypeCheck *op, Label* success, Label* failure, Label* obj_is_null) { 1702 // we always need a stub for the failure case. 1703 CodeStub* stub = op->stub(); 1704 Register obj = op->object()->as_register(); 1705 Register k_RInfo = op->tmp1()->as_register(); 1706 Register klass_RInfo = op->tmp2()->as_register(); 1707 Register dst = op->result_opr()->as_register(); 1708 ciKlass* k = op->klass(); 1709 Register Rtmp1 = noreg; 1710 1711 // check if it needs to be profiled 1712 ciMethodData* md; 1713 ciProfileData* data; 1714 1715 if (op->should_profile()) { 1716 ciMethod* method = op->profiled_method(); 1717 assert(method != NULL, "Should have method"); 1718 int bci = op->profiled_bci(); 1719 md = method->method_data_or_null(); 1720 assert(md != NULL, "Sanity"); 1721 data = md->bci_to_data(bci); 1722 assert(data != NULL, "need data for type check"); 1723 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check"); 1724 } 1725 Label profile_cast_success, profile_cast_failure; 1726 Label *success_target = op->should_profile() ? &profile_cast_success : success; 1727 Label *failure_target = op->should_profile() ? &profile_cast_failure : failure; 1728 1729 if (obj == k_RInfo) { 1730 k_RInfo = dst; 1731 } else if (obj == klass_RInfo) { 1732 klass_RInfo = dst; 1733 } 1734 if (k->is_loaded() && !UseCompressedOops) { 1735 select_different_registers(obj, dst, k_RInfo, klass_RInfo); 1736 } else { 1737 Rtmp1 = op->tmp3()->as_register(); 1738 select_different_registers(obj, dst, k_RInfo, klass_RInfo, Rtmp1); 1739 } 1740 1741 assert_different_registers(obj, k_RInfo, klass_RInfo); 1742 if (!k->is_loaded()) { 1743 jobject2reg_with_patching(k_RInfo, op->info_for_patch()); 1744 } else { 1745 #ifdef _LP64 1746 __ movoop(k_RInfo, k->constant_encoding()); 1747 #endif // _LP64 1748 } 1749 assert(obj != k_RInfo, "must be different"); 1750 1751 __ cmpptr(obj, (int32_t)NULL_WORD); 1752 if (op->should_profile()) { 1753 Label not_null; 1754 __ jccb(Assembler::notEqual, not_null); 1755 // Object is null; update MDO and exit 1756 Register mdo = klass_RInfo; 1757 __ movoop(mdo, md->constant_encoding()); 1758 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::header_offset())); 1759 int header_bits = DataLayout::flag_mask_to_header_mask(BitData::null_seen_byte_constant()); 1760 __ orl(data_addr, header_bits); 1761 __ jmp(*obj_is_null); 1762 __ bind(not_null); 1763 } else { 1764 __ jcc(Assembler::equal, *obj_is_null); 1765 } 1766 __ verify_oop(obj); 1767 1768 if (op->fast_check()) { 1769 // get object class 1770 // not a safepoint as obj null check happens earlier 1771 #ifdef _LP64 1772 if (UseCompressedOops) { 1773 __ load_klass(Rtmp1, obj); 1774 __ cmpptr(k_RInfo, Rtmp1); 1775 } else { 1776 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes())); 1777 } 1778 #else 1779 if (k->is_loaded()) { 1780 __ cmpoop(Address(obj, oopDesc::klass_offset_in_bytes()), k->constant_encoding()); 1781 } else { 1782 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes())); 1783 } 1784 #endif 1785 __ jcc(Assembler::notEqual, *failure_target); 1786 // successful cast, fall through to profile or jump 1787 } else { 1788 // get object class 1789 // not a safepoint as obj null check happens earlier 1790 __ load_klass(klass_RInfo, obj); 1791 if (k->is_loaded()) { 1792 // See if we get an immediate positive hit 1793 #ifdef _LP64 1794 __ cmpptr(k_RInfo, Address(klass_RInfo, k->super_check_offset())); 1795 #else 1796 __ cmpoop(Address(klass_RInfo, k->super_check_offset()), k->constant_encoding()); 1797 #endif // _LP64 1798 if (sizeof(oopDesc) + Klass::secondary_super_cache_offset_in_bytes() != k->super_check_offset()) { 1799 __ jcc(Assembler::notEqual, *failure_target); 1800 // successful cast, fall through to profile or jump 1801 } else { 1802 // See if we get an immediate positive hit 1803 __ jcc(Assembler::equal, *success_target); 1804 // check for self 1805 #ifdef _LP64 1806 __ cmpptr(klass_RInfo, k_RInfo); 1807 #else 1808 __ cmpoop(klass_RInfo, k->constant_encoding()); 1809 #endif // _LP64 1810 __ jcc(Assembler::equal, *success_target); 1811 1812 __ push(klass_RInfo); 1813 #ifdef _LP64 1814 __ push(k_RInfo); 1815 #else 1816 __ pushoop(k->constant_encoding()); 1817 #endif // _LP64 1818 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 1819 __ pop(klass_RInfo); 1820 __ pop(klass_RInfo); 1821 // result is a boolean 1822 __ cmpl(klass_RInfo, 0); 1823 __ jcc(Assembler::equal, *failure_target); 1824 // successful cast, fall through to profile or jump 1825 } 1826 } else { 1827 // perform the fast part of the checking logic 1828 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL); 1829 // call out-of-line instance of __ check_klass_subtype_slow_path(...): 1830 __ push(klass_RInfo); 1831 __ push(k_RInfo); 1832 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 1833 __ pop(klass_RInfo); 1834 __ pop(k_RInfo); 1835 // result is a boolean 1836 __ cmpl(k_RInfo, 0); 1837 __ jcc(Assembler::equal, *failure_target); 1838 // successful cast, fall through to profile or jump 1839 } 1840 } 1841 if (op->should_profile()) { 1842 Register mdo = klass_RInfo, recv = k_RInfo; 1843 __ bind(profile_cast_success); 1844 __ movoop(mdo, md->constant_encoding()); 1845 __ load_klass(recv, obj); 1846 Label update_done; 1847 type_profile_helper(mdo, md, data, recv, success); 1848 __ jmp(*success); 1849 1850 __ bind(profile_cast_failure); 1851 __ movoop(mdo, md->constant_encoding()); 1852 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset())); 1853 __ subptr(counter_addr, DataLayout::counter_increment); 1854 __ jmp(*failure); 1855 } 1856 __ jmp(*success); 1857 } 1858 1859 1860 void LIR_Assembler::emit_opTypeCheck(LIR_OpTypeCheck* op) { 1861 LIR_Code code = op->code(); 1862 if (code == lir_store_check) { 1863 Register value = op->object()->as_register(); 1864 Register array = op->array()->as_register(); 1865 Register k_RInfo = op->tmp1()->as_register(); 1866 Register klass_RInfo = op->tmp2()->as_register(); 1867 Register Rtmp1 = op->tmp3()->as_register(); 1868 1869 CodeStub* stub = op->stub(); 1870 1871 // check if it needs to be profiled 1872 ciMethodData* md; 1873 ciProfileData* data; 1874 1875 if (op->should_profile()) { 1876 ciMethod* method = op->profiled_method(); 1877 assert(method != NULL, "Should have method"); 1878 int bci = op->profiled_bci(); 1879 md = method->method_data_or_null(); 1880 assert(md != NULL, "Sanity"); 1881 data = md->bci_to_data(bci); 1882 assert(data != NULL, "need data for type check"); 1883 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check"); 1884 } 1885 Label profile_cast_success, profile_cast_failure, done; 1886 Label *success_target = op->should_profile() ? &profile_cast_success : &done; 1887 Label *failure_target = op->should_profile() ? &profile_cast_failure : stub->entry(); 1888 1889 __ cmpptr(value, (int32_t)NULL_WORD); 1890 if (op->should_profile()) { 1891 Label not_null; 1892 __ jccb(Assembler::notEqual, not_null); 1893 // Object is null; update MDO and exit 1894 Register mdo = klass_RInfo; 1895 __ movoop(mdo, md->constant_encoding()); 1896 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::header_offset())); 1897 int header_bits = DataLayout::flag_mask_to_header_mask(BitData::null_seen_byte_constant()); 1898 __ orl(data_addr, header_bits); 1899 __ jmp(done); 1900 __ bind(not_null); 1901 } else { 1902 __ jcc(Assembler::equal, done); 1903 } 1904 1905 add_debug_info_for_null_check_here(op->info_for_exception()); 1906 __ load_klass(k_RInfo, array); 1907 __ load_klass(klass_RInfo, value); 1908 1909 // get instance klass (it's already uncompressed) 1910 __ movptr(k_RInfo, Address(k_RInfo, objArrayKlass::element_klass_offset_in_bytes() + sizeof(oopDesc))); 1911 // perform the fast part of the checking logic 1912 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL); 1913 // call out-of-line instance of __ check_klass_subtype_slow_path(...): 1914 __ push(klass_RInfo); 1915 __ push(k_RInfo); 1916 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 1917 __ pop(klass_RInfo); 1918 __ pop(k_RInfo); 1919 // result is a boolean 1920 __ cmpl(k_RInfo, 0); 1921 __ jcc(Assembler::equal, *failure_target); 1922 // fall through to the success case 1923 1924 if (op->should_profile()) { 1925 Register mdo = klass_RInfo, recv = k_RInfo; 1926 __ bind(profile_cast_success); 1927 __ movoop(mdo, md->constant_encoding()); 1928 __ load_klass(recv, value); 1929 Label update_done; 1930 type_profile_helper(mdo, md, data, recv, &done); 1931 __ jmpb(done); 1932 1933 __ bind(profile_cast_failure); 1934 __ movoop(mdo, md->constant_encoding()); 1935 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset())); 1936 __ subptr(counter_addr, DataLayout::counter_increment); 1937 __ jmp(*stub->entry()); 1938 } 1939 1940 __ bind(done); 1941 } else 1942 if (code == lir_checkcast) { 1943 Register obj = op->object()->as_register(); 1944 Register dst = op->result_opr()->as_register(); 1945 Label success; 1946 emit_typecheck_helper(op, &success, op->stub()->entry(), &success); 1947 __ bind(success); 1948 if (dst != obj) { 1949 __ mov(dst, obj); 1950 } 1951 } else 1952 if (code == lir_instanceof) { 1953 Register obj = op->object()->as_register(); 1954 Register dst = op->result_opr()->as_register(); 1955 Label success, failure, done; 1956 emit_typecheck_helper(op, &success, &failure, &failure); 1957 __ bind(failure); 1958 __ xorptr(dst, dst); 1959 __ jmpb(done); 1960 __ bind(success); 1961 __ movptr(dst, 1); 1962 __ bind(done); 1963 } else { 1964 ShouldNotReachHere(); 1965 } 1966 1967 } 1968 1969 1970 void LIR_Assembler::emit_compare_and_swap(LIR_OpCompareAndSwap* op) { 1971 if (LP64_ONLY(false &&) op->code() == lir_cas_long && VM_Version::supports_cx8()) { 1972 assert(op->cmp_value()->as_register_lo() == rax, "wrong register"); 1973 assert(op->cmp_value()->as_register_hi() == rdx, "wrong register"); 1974 assert(op->new_value()->as_register_lo() == rbx, "wrong register"); 1975 assert(op->new_value()->as_register_hi() == rcx, "wrong register"); 1976 Register addr = op->addr()->as_register(); 1977 if (os::is_MP()) { 1978 __ lock(); 1979 } 1980 NOT_LP64(__ cmpxchg8(Address(addr, 0))); 1981 1982 } else if (op->code() == lir_cas_int || op->code() == lir_cas_obj ) { 1983 NOT_LP64(assert(op->addr()->is_single_cpu(), "must be single");) 1984 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo()); 1985 Register newval = op->new_value()->as_register(); 1986 Register cmpval = op->cmp_value()->as_register(); 1987 assert(cmpval == rax, "wrong register"); 1988 assert(newval != NULL, "new val must be register"); 1989 assert(cmpval != newval, "cmp and new values must be in different registers"); 1990 assert(cmpval != addr, "cmp and addr must be in different registers"); 1991 assert(newval != addr, "new value and addr must be in different registers"); 1992 1993 if ( op->code() == lir_cas_obj) { 1994 #ifdef _LP64 1995 if (UseCompressedOops) { 1996 __ encode_heap_oop(cmpval); 1997 __ mov(rscratch1, newval); 1998 __ encode_heap_oop(rscratch1); 1999 if (os::is_MP()) { 2000 __ lock(); 2001 } 2002 // cmpval (rax) is implicitly used by this instruction 2003 __ cmpxchgl(rscratch1, Address(addr, 0)); 2004 } else 2005 #endif 2006 { 2007 if (os::is_MP()) { 2008 __ lock(); 2009 } 2010 __ cmpxchgptr(newval, Address(addr, 0)); 2011 } 2012 } else { 2013 assert(op->code() == lir_cas_int, "lir_cas_int expected"); 2014 if (os::is_MP()) { 2015 __ lock(); 2016 } 2017 __ cmpxchgl(newval, Address(addr, 0)); 2018 } 2019 #ifdef _LP64 2020 } else if (op->code() == lir_cas_long) { 2021 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo()); 2022 Register newval = op->new_value()->as_register_lo(); 2023 Register cmpval = op->cmp_value()->as_register_lo(); 2024 assert(cmpval == rax, "wrong register"); 2025 assert(newval != NULL, "new val must be register"); 2026 assert(cmpval != newval, "cmp and new values must be in different registers"); 2027 assert(cmpval != addr, "cmp and addr must be in different registers"); 2028 assert(newval != addr, "new value and addr must be in different registers"); 2029 if (os::is_MP()) { 2030 __ lock(); 2031 } 2032 __ cmpxchgq(newval, Address(addr, 0)); 2033 #endif // _LP64 2034 } else { 2035 Unimplemented(); 2036 } 2037 } 2038 2039 void LIR_Assembler::cmove(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result, BasicType type) { 2040 Assembler::Condition acond, ncond; 2041 switch (condition) { 2042 case lir_cond_equal: acond = Assembler::equal; ncond = Assembler::notEqual; break; 2043 case lir_cond_notEqual: acond = Assembler::notEqual; ncond = Assembler::equal; break; 2044 case lir_cond_less: acond = Assembler::less; ncond = Assembler::greaterEqual; break; 2045 case lir_cond_lessEqual: acond = Assembler::lessEqual; ncond = Assembler::greater; break; 2046 case lir_cond_greaterEqual: acond = Assembler::greaterEqual; ncond = Assembler::less; break; 2047 case lir_cond_greater: acond = Assembler::greater; ncond = Assembler::lessEqual; break; 2048 case lir_cond_belowEqual: acond = Assembler::belowEqual; ncond = Assembler::above; break; 2049 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; ncond = Assembler::below; break; 2050 default: ShouldNotReachHere(); 2051 } 2052 2053 if (opr1->is_cpu_register()) { 2054 reg2reg(opr1, result); 2055 } else if (opr1->is_stack()) { 2056 stack2reg(opr1, result, result->type()); 2057 } else if (opr1->is_constant()) { 2058 const2reg(opr1, result, lir_patch_none, NULL); 2059 } else { 2060 ShouldNotReachHere(); 2061 } 2062 2063 if (VM_Version::supports_cmov() && !opr2->is_constant()) { 2064 // optimized version that does not require a branch 2065 if (opr2->is_single_cpu()) { 2066 assert(opr2->cpu_regnr() != result->cpu_regnr(), "opr2 already overwritten by previous move"); 2067 __ cmov(ncond, result->as_register(), opr2->as_register()); 2068 } else if (opr2->is_double_cpu()) { 2069 assert(opr2->cpu_regnrLo() != result->cpu_regnrLo() && opr2->cpu_regnrLo() != result->cpu_regnrHi(), "opr2 already overwritten by previous move"); 2070 assert(opr2->cpu_regnrHi() != result->cpu_regnrLo() && opr2->cpu_regnrHi() != result->cpu_regnrHi(), "opr2 already overwritten by previous move"); 2071 __ cmovptr(ncond, result->as_register_lo(), opr2->as_register_lo()); 2072 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), opr2->as_register_hi());) 2073 } else if (opr2->is_single_stack()) { 2074 __ cmovl(ncond, result->as_register(), frame_map()->address_for_slot(opr2->single_stack_ix())); 2075 } else if (opr2->is_double_stack()) { 2076 __ cmovptr(ncond, result->as_register_lo(), frame_map()->address_for_slot(opr2->double_stack_ix(), lo_word_offset_in_bytes)); 2077 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), frame_map()->address_for_slot(opr2->double_stack_ix(), hi_word_offset_in_bytes));) 2078 } else { 2079 ShouldNotReachHere(); 2080 } 2081 2082 } else { 2083 Label skip; 2084 __ jcc (acond, skip); 2085 if (opr2->is_cpu_register()) { 2086 reg2reg(opr2, result); 2087 } else if (opr2->is_stack()) { 2088 stack2reg(opr2, result, result->type()); 2089 } else if (opr2->is_constant()) { 2090 const2reg(opr2, result, lir_patch_none, NULL); 2091 } else { 2092 ShouldNotReachHere(); 2093 } 2094 __ bind(skip); 2095 } 2096 } 2097 2098 2099 void LIR_Assembler::arith_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dest, CodeEmitInfo* info, bool pop_fpu_stack) { 2100 assert(info == NULL, "should never be used, idiv/irem and ldiv/lrem not handled by this method"); 2101 2102 if (left->is_single_cpu()) { 2103 assert(left == dest, "left and dest must be equal"); 2104 Register lreg = left->as_register(); 2105 2106 if (right->is_single_cpu()) { 2107 // cpu register - cpu register 2108 Register rreg = right->as_register(); 2109 switch (code) { 2110 case lir_add: __ addl (lreg, rreg); break; 2111 case lir_sub: __ subl (lreg, rreg); break; 2112 case lir_mul: __ imull(lreg, rreg); break; 2113 default: ShouldNotReachHere(); 2114 } 2115 2116 } else if (right->is_stack()) { 2117 // cpu register - stack 2118 Address raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2119 switch (code) { 2120 case lir_add: __ addl(lreg, raddr); break; 2121 case lir_sub: __ subl(lreg, raddr); break; 2122 default: ShouldNotReachHere(); 2123 } 2124 2125 } else if (right->is_constant()) { 2126 // cpu register - constant 2127 jint c = right->as_constant_ptr()->as_jint(); 2128 switch (code) { 2129 case lir_add: { 2130 __ incrementl(lreg, c); 2131 break; 2132 } 2133 case lir_sub: { 2134 __ decrementl(lreg, c); 2135 break; 2136 } 2137 default: ShouldNotReachHere(); 2138 } 2139 2140 } else { 2141 ShouldNotReachHere(); 2142 } 2143 2144 } else if (left->is_double_cpu()) { 2145 assert(left == dest, "left and dest must be equal"); 2146 Register lreg_lo = left->as_register_lo(); 2147 Register lreg_hi = left->as_register_hi(); 2148 2149 if (right->is_double_cpu()) { 2150 // cpu register - cpu register 2151 Register rreg_lo = right->as_register_lo(); 2152 Register rreg_hi = right->as_register_hi(); 2153 NOT_LP64(assert_different_registers(lreg_lo, lreg_hi, rreg_lo, rreg_hi)); 2154 LP64_ONLY(assert_different_registers(lreg_lo, rreg_lo)); 2155 switch (code) { 2156 case lir_add: 2157 __ addptr(lreg_lo, rreg_lo); 2158 NOT_LP64(__ adcl(lreg_hi, rreg_hi)); 2159 break; 2160 case lir_sub: 2161 __ subptr(lreg_lo, rreg_lo); 2162 NOT_LP64(__ sbbl(lreg_hi, rreg_hi)); 2163 break; 2164 case lir_mul: 2165 #ifdef _LP64 2166 __ imulq(lreg_lo, rreg_lo); 2167 #else 2168 assert(lreg_lo == rax && lreg_hi == rdx, "must be"); 2169 __ imull(lreg_hi, rreg_lo); 2170 __ imull(rreg_hi, lreg_lo); 2171 __ addl (rreg_hi, lreg_hi); 2172 __ mull (rreg_lo); 2173 __ addl (lreg_hi, rreg_hi); 2174 #endif // _LP64 2175 break; 2176 default: 2177 ShouldNotReachHere(); 2178 } 2179 2180 } else if (right->is_constant()) { 2181 // cpu register - constant 2182 #ifdef _LP64 2183 jlong c = right->as_constant_ptr()->as_jlong_bits(); 2184 __ movptr(r10, (intptr_t) c); 2185 switch (code) { 2186 case lir_add: 2187 __ addptr(lreg_lo, r10); 2188 break; 2189 case lir_sub: 2190 __ subptr(lreg_lo, r10); 2191 break; 2192 default: 2193 ShouldNotReachHere(); 2194 } 2195 #else 2196 jint c_lo = right->as_constant_ptr()->as_jint_lo(); 2197 jint c_hi = right->as_constant_ptr()->as_jint_hi(); 2198 switch (code) { 2199 case lir_add: 2200 __ addptr(lreg_lo, c_lo); 2201 __ adcl(lreg_hi, c_hi); 2202 break; 2203 case lir_sub: 2204 __ subptr(lreg_lo, c_lo); 2205 __ sbbl(lreg_hi, c_hi); 2206 break; 2207 default: 2208 ShouldNotReachHere(); 2209 } 2210 #endif // _LP64 2211 2212 } else { 2213 ShouldNotReachHere(); 2214 } 2215 2216 } else if (left->is_single_xmm()) { 2217 assert(left == dest, "left and dest must be equal"); 2218 XMMRegister lreg = left->as_xmm_float_reg(); 2219 2220 if (right->is_single_xmm()) { 2221 XMMRegister rreg = right->as_xmm_float_reg(); 2222 switch (code) { 2223 case lir_add: __ addss(lreg, rreg); break; 2224 case lir_sub: __ subss(lreg, rreg); break; 2225 case lir_mul_strictfp: // fall through 2226 case lir_mul: __ mulss(lreg, rreg); break; 2227 case lir_div_strictfp: // fall through 2228 case lir_div: __ divss(lreg, rreg); break; 2229 default: ShouldNotReachHere(); 2230 } 2231 } else { 2232 Address raddr; 2233 if (right->is_single_stack()) { 2234 raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2235 } else if (right->is_constant()) { 2236 // hack for now 2237 raddr = __ as_Address(InternalAddress(float_constant(right->as_jfloat()))); 2238 } else { 2239 ShouldNotReachHere(); 2240 } 2241 switch (code) { 2242 case lir_add: __ addss(lreg, raddr); break; 2243 case lir_sub: __ subss(lreg, raddr); break; 2244 case lir_mul_strictfp: // fall through 2245 case lir_mul: __ mulss(lreg, raddr); break; 2246 case lir_div_strictfp: // fall through 2247 case lir_div: __ divss(lreg, raddr); break; 2248 default: ShouldNotReachHere(); 2249 } 2250 } 2251 2252 } else if (left->is_double_xmm()) { 2253 assert(left == dest, "left and dest must be equal"); 2254 2255 XMMRegister lreg = left->as_xmm_double_reg(); 2256 if (right->is_double_xmm()) { 2257 XMMRegister rreg = right->as_xmm_double_reg(); 2258 switch (code) { 2259 case lir_add: __ addsd(lreg, rreg); break; 2260 case lir_sub: __ subsd(lreg, rreg); break; 2261 case lir_mul_strictfp: // fall through 2262 case lir_mul: __ mulsd(lreg, rreg); break; 2263 case lir_div_strictfp: // fall through 2264 case lir_div: __ divsd(lreg, rreg); break; 2265 default: ShouldNotReachHere(); 2266 } 2267 } else { 2268 Address raddr; 2269 if (right->is_double_stack()) { 2270 raddr = frame_map()->address_for_slot(right->double_stack_ix()); 2271 } else if (right->is_constant()) { 2272 // hack for now 2273 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble()))); 2274 } else { 2275 ShouldNotReachHere(); 2276 } 2277 switch (code) { 2278 case lir_add: __ addsd(lreg, raddr); break; 2279 case lir_sub: __ subsd(lreg, raddr); break; 2280 case lir_mul_strictfp: // fall through 2281 case lir_mul: __ mulsd(lreg, raddr); break; 2282 case lir_div_strictfp: // fall through 2283 case lir_div: __ divsd(lreg, raddr); break; 2284 default: ShouldNotReachHere(); 2285 } 2286 } 2287 2288 } else if (left->is_single_fpu()) { 2289 assert(dest->is_single_fpu(), "fpu stack allocation required"); 2290 2291 if (right->is_single_fpu()) { 2292 arith_fpu_implementation(code, left->fpu_regnr(), right->fpu_regnr(), dest->fpu_regnr(), pop_fpu_stack); 2293 2294 } else { 2295 assert(left->fpu_regnr() == 0, "left must be on TOS"); 2296 assert(dest->fpu_regnr() == 0, "dest must be on TOS"); 2297 2298 Address raddr; 2299 if (right->is_single_stack()) { 2300 raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2301 } else if (right->is_constant()) { 2302 address const_addr = float_constant(right->as_jfloat()); 2303 assert(const_addr != NULL, "incorrect float/double constant maintainance"); 2304 // hack for now 2305 raddr = __ as_Address(InternalAddress(const_addr)); 2306 } else { 2307 ShouldNotReachHere(); 2308 } 2309 2310 switch (code) { 2311 case lir_add: __ fadd_s(raddr); break; 2312 case lir_sub: __ fsub_s(raddr); break; 2313 case lir_mul_strictfp: // fall through 2314 case lir_mul: __ fmul_s(raddr); break; 2315 case lir_div_strictfp: // fall through 2316 case lir_div: __ fdiv_s(raddr); break; 2317 default: ShouldNotReachHere(); 2318 } 2319 } 2320 2321 } else if (left->is_double_fpu()) { 2322 assert(dest->is_double_fpu(), "fpu stack allocation required"); 2323 2324 if (code == lir_mul_strictfp || code == lir_div_strictfp) { 2325 // Double values require special handling for strictfp mul/div on x86 2326 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1())); 2327 __ fmulp(left->fpu_regnrLo() + 1); 2328 } 2329 2330 if (right->is_double_fpu()) { 2331 arith_fpu_implementation(code, left->fpu_regnrLo(), right->fpu_regnrLo(), dest->fpu_regnrLo(), pop_fpu_stack); 2332 2333 } else { 2334 assert(left->fpu_regnrLo() == 0, "left must be on TOS"); 2335 assert(dest->fpu_regnrLo() == 0, "dest must be on TOS"); 2336 2337 Address raddr; 2338 if (right->is_double_stack()) { 2339 raddr = frame_map()->address_for_slot(right->double_stack_ix()); 2340 } else if (right->is_constant()) { 2341 // hack for now 2342 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble()))); 2343 } else { 2344 ShouldNotReachHere(); 2345 } 2346 2347 switch (code) { 2348 case lir_add: __ fadd_d(raddr); break; 2349 case lir_sub: __ fsub_d(raddr); break; 2350 case lir_mul_strictfp: // fall through 2351 case lir_mul: __ fmul_d(raddr); break; 2352 case lir_div_strictfp: // fall through 2353 case lir_div: __ fdiv_d(raddr); break; 2354 default: ShouldNotReachHere(); 2355 } 2356 } 2357 2358 if (code == lir_mul_strictfp || code == lir_div_strictfp) { 2359 // Double values require special handling for strictfp mul/div on x86 2360 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2())); 2361 __ fmulp(dest->fpu_regnrLo() + 1); 2362 } 2363 2364 } else if (left->is_single_stack() || left->is_address()) { 2365 assert(left == dest, "left and dest must be equal"); 2366 2367 Address laddr; 2368 if (left->is_single_stack()) { 2369 laddr = frame_map()->address_for_slot(left->single_stack_ix()); 2370 } else if (left->is_address()) { 2371 laddr = as_Address(left->as_address_ptr()); 2372 } else { 2373 ShouldNotReachHere(); 2374 } 2375 2376 if (right->is_single_cpu()) { 2377 Register rreg = right->as_register(); 2378 switch (code) { 2379 case lir_add: __ addl(laddr, rreg); break; 2380 case lir_sub: __ subl(laddr, rreg); break; 2381 default: ShouldNotReachHere(); 2382 } 2383 } else if (right->is_constant()) { 2384 jint c = right->as_constant_ptr()->as_jint(); 2385 switch (code) { 2386 case lir_add: { 2387 __ incrementl(laddr, c); 2388 break; 2389 } 2390 case lir_sub: { 2391 __ decrementl(laddr, c); 2392 break; 2393 } 2394 default: ShouldNotReachHere(); 2395 } 2396 } else { 2397 ShouldNotReachHere(); 2398 } 2399 2400 } else { 2401 ShouldNotReachHere(); 2402 } 2403 } 2404 2405 void LIR_Assembler::arith_fpu_implementation(LIR_Code code, int left_index, int right_index, int dest_index, bool pop_fpu_stack) { 2406 assert(pop_fpu_stack || (left_index == dest_index || right_index == dest_index), "invalid LIR"); 2407 assert(!pop_fpu_stack || (left_index - 1 == dest_index || right_index - 1 == dest_index), "invalid LIR"); 2408 assert(left_index == 0 || right_index == 0, "either must be on top of stack"); 2409 2410 bool left_is_tos = (left_index == 0); 2411 bool dest_is_tos = (dest_index == 0); 2412 int non_tos_index = (left_is_tos ? right_index : left_index); 2413 2414 switch (code) { 2415 case lir_add: 2416 if (pop_fpu_stack) __ faddp(non_tos_index); 2417 else if (dest_is_tos) __ fadd (non_tos_index); 2418 else __ fadda(non_tos_index); 2419 break; 2420 2421 case lir_sub: 2422 if (left_is_tos) { 2423 if (pop_fpu_stack) __ fsubrp(non_tos_index); 2424 else if (dest_is_tos) __ fsub (non_tos_index); 2425 else __ fsubra(non_tos_index); 2426 } else { 2427 if (pop_fpu_stack) __ fsubp (non_tos_index); 2428 else if (dest_is_tos) __ fsubr (non_tos_index); 2429 else __ fsuba (non_tos_index); 2430 } 2431 break; 2432 2433 case lir_mul_strictfp: // fall through 2434 case lir_mul: 2435 if (pop_fpu_stack) __ fmulp(non_tos_index); 2436 else if (dest_is_tos) __ fmul (non_tos_index); 2437 else __ fmula(non_tos_index); 2438 break; 2439 2440 case lir_div_strictfp: // fall through 2441 case lir_div: 2442 if (left_is_tos) { 2443 if (pop_fpu_stack) __ fdivrp(non_tos_index); 2444 else if (dest_is_tos) __ fdiv (non_tos_index); 2445 else __ fdivra(non_tos_index); 2446 } else { 2447 if (pop_fpu_stack) __ fdivp (non_tos_index); 2448 else if (dest_is_tos) __ fdivr (non_tos_index); 2449 else __ fdiva (non_tos_index); 2450 } 2451 break; 2452 2453 case lir_rem: 2454 assert(left_is_tos && dest_is_tos && right_index == 1, "must be guaranteed by FPU stack allocation"); 2455 __ fremr(noreg); 2456 break; 2457 2458 default: 2459 ShouldNotReachHere(); 2460 } 2461 } 2462 2463 2464 void LIR_Assembler::intrinsic_op(LIR_Code code, LIR_Opr value, LIR_Opr unused, LIR_Opr dest, LIR_Op* op) { 2465 if (value->is_double_xmm()) { 2466 switch(code) { 2467 case lir_abs : 2468 { 2469 if (dest->as_xmm_double_reg() != value->as_xmm_double_reg()) { 2470 __ movdbl(dest->as_xmm_double_reg(), value->as_xmm_double_reg()); 2471 } 2472 __ andpd(dest->as_xmm_double_reg(), 2473 ExternalAddress((address)double_signmask_pool)); 2474 } 2475 break; 2476 2477 case lir_sqrt: __ sqrtsd(dest->as_xmm_double_reg(), value->as_xmm_double_reg()); break; 2478 // all other intrinsics are not available in the SSE instruction set, so FPU is used 2479 default : ShouldNotReachHere(); 2480 } 2481 2482 } else if (value->is_double_fpu()) { 2483 assert(value->fpu_regnrLo() == 0 && dest->fpu_regnrLo() == 0, "both must be on TOS"); 2484 switch(code) { 2485 case lir_log : __ flog() ; break; 2486 case lir_log10 : __ flog10() ; break; 2487 case lir_abs : __ fabs() ; break; 2488 case lir_sqrt : __ fsqrt(); break; 2489 case lir_sin : 2490 // Should consider not saving rbx, if not necessary 2491 __ trigfunc('s', op->as_Op2()->fpu_stack_size()); 2492 break; 2493 case lir_cos : 2494 // Should consider not saving rbx, if not necessary 2495 assert(op->as_Op2()->fpu_stack_size() <= 6, "sin and cos need two free stack slots"); 2496 __ trigfunc('c', op->as_Op2()->fpu_stack_size()); 2497 break; 2498 case lir_tan : 2499 // Should consider not saving rbx, if not necessary 2500 __ trigfunc('t', op->as_Op2()->fpu_stack_size()); 2501 break; 2502 default : ShouldNotReachHere(); 2503 } 2504 } else { 2505 Unimplemented(); 2506 } 2507 } 2508 2509 void LIR_Assembler::logic_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst) { 2510 // assert(left->destroys_register(), "check"); 2511 if (left->is_single_cpu()) { 2512 Register reg = left->as_register(); 2513 if (right->is_constant()) { 2514 int val = right->as_constant_ptr()->as_jint(); 2515 switch (code) { 2516 case lir_logic_and: __ andl (reg, val); break; 2517 case lir_logic_or: __ orl (reg, val); break; 2518 case lir_logic_xor: __ xorl (reg, val); break; 2519 default: ShouldNotReachHere(); 2520 } 2521 } else if (right->is_stack()) { 2522 // added support for stack operands 2523 Address raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2524 switch (code) { 2525 case lir_logic_and: __ andl (reg, raddr); break; 2526 case lir_logic_or: __ orl (reg, raddr); break; 2527 case lir_logic_xor: __ xorl (reg, raddr); break; 2528 default: ShouldNotReachHere(); 2529 } 2530 } else { 2531 Register rright = right->as_register(); 2532 switch (code) { 2533 case lir_logic_and: __ andptr (reg, rright); break; 2534 case lir_logic_or : __ orptr (reg, rright); break; 2535 case lir_logic_xor: __ xorptr (reg, rright); break; 2536 default: ShouldNotReachHere(); 2537 } 2538 } 2539 move_regs(reg, dst->as_register()); 2540 } else { 2541 Register l_lo = left->as_register_lo(); 2542 Register l_hi = left->as_register_hi(); 2543 if (right->is_constant()) { 2544 #ifdef _LP64 2545 __ mov64(rscratch1, right->as_constant_ptr()->as_jlong()); 2546 switch (code) { 2547 case lir_logic_and: 2548 __ andq(l_lo, rscratch1); 2549 break; 2550 case lir_logic_or: 2551 __ orq(l_lo, rscratch1); 2552 break; 2553 case lir_logic_xor: 2554 __ xorq(l_lo, rscratch1); 2555 break; 2556 default: ShouldNotReachHere(); 2557 } 2558 #else 2559 int r_lo = right->as_constant_ptr()->as_jint_lo(); 2560 int r_hi = right->as_constant_ptr()->as_jint_hi(); 2561 switch (code) { 2562 case lir_logic_and: 2563 __ andl(l_lo, r_lo); 2564 __ andl(l_hi, r_hi); 2565 break; 2566 case lir_logic_or: 2567 __ orl(l_lo, r_lo); 2568 __ orl(l_hi, r_hi); 2569 break; 2570 case lir_logic_xor: 2571 __ xorl(l_lo, r_lo); 2572 __ xorl(l_hi, r_hi); 2573 break; 2574 default: ShouldNotReachHere(); 2575 } 2576 #endif // _LP64 2577 } else { 2578 #ifdef _LP64 2579 Register r_lo; 2580 if (right->type() == T_OBJECT || right->type() == T_ARRAY) { 2581 r_lo = right->as_register(); 2582 } else { 2583 r_lo = right->as_register_lo(); 2584 } 2585 #else 2586 Register r_lo = right->as_register_lo(); 2587 Register r_hi = right->as_register_hi(); 2588 assert(l_lo != r_hi, "overwriting registers"); 2589 #endif 2590 switch (code) { 2591 case lir_logic_and: 2592 __ andptr(l_lo, r_lo); 2593 NOT_LP64(__ andptr(l_hi, r_hi);) 2594 break; 2595 case lir_logic_or: 2596 __ orptr(l_lo, r_lo); 2597 NOT_LP64(__ orptr(l_hi, r_hi);) 2598 break; 2599 case lir_logic_xor: 2600 __ xorptr(l_lo, r_lo); 2601 NOT_LP64(__ xorptr(l_hi, r_hi);) 2602 break; 2603 default: ShouldNotReachHere(); 2604 } 2605 } 2606 2607 Register dst_lo = dst->as_register_lo(); 2608 Register dst_hi = dst->as_register_hi(); 2609 2610 #ifdef _LP64 2611 move_regs(l_lo, dst_lo); 2612 #else 2613 if (dst_lo == l_hi) { 2614 assert(dst_hi != l_lo, "overwriting registers"); 2615 move_regs(l_hi, dst_hi); 2616 move_regs(l_lo, dst_lo); 2617 } else { 2618 assert(dst_lo != l_hi, "overwriting registers"); 2619 move_regs(l_lo, dst_lo); 2620 move_regs(l_hi, dst_hi); 2621 } 2622 #endif // _LP64 2623 } 2624 } 2625 2626 2627 // we assume that rax, and rdx can be overwritten 2628 void LIR_Assembler::arithmetic_idiv(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr temp, LIR_Opr result, CodeEmitInfo* info) { 2629 2630 assert(left->is_single_cpu(), "left must be register"); 2631 assert(right->is_single_cpu() || right->is_constant(), "right must be register or constant"); 2632 assert(result->is_single_cpu(), "result must be register"); 2633 2634 // assert(left->destroys_register(), "check"); 2635 // assert(right->destroys_register(), "check"); 2636 2637 Register lreg = left->as_register(); 2638 Register dreg = result->as_register(); 2639 2640 if (right->is_constant()) { 2641 int divisor = right->as_constant_ptr()->as_jint(); 2642 assert(divisor > 0 && is_power_of_2(divisor), "must be"); 2643 if (code == lir_idiv) { 2644 assert(lreg == rax, "must be rax,"); 2645 assert(temp->as_register() == rdx, "tmp register must be rdx"); 2646 __ cdql(); // sign extend into rdx:rax 2647 if (divisor == 2) { 2648 __ subl(lreg, rdx); 2649 } else { 2650 __ andl(rdx, divisor - 1); 2651 __ addl(lreg, rdx); 2652 } 2653 __ sarl(lreg, log2_intptr(divisor)); 2654 move_regs(lreg, dreg); 2655 } else if (code == lir_irem) { 2656 Label done; 2657 __ mov(dreg, lreg); 2658 __ andl(dreg, 0x80000000 | (divisor - 1)); 2659 __ jcc(Assembler::positive, done); 2660 __ decrement(dreg); 2661 __ orl(dreg, ~(divisor - 1)); 2662 __ increment(dreg); 2663 __ bind(done); 2664 } else { 2665 ShouldNotReachHere(); 2666 } 2667 } else { 2668 Register rreg = right->as_register(); 2669 assert(lreg == rax, "left register must be rax,"); 2670 assert(rreg != rdx, "right register must not be rdx"); 2671 assert(temp->as_register() == rdx, "tmp register must be rdx"); 2672 2673 move_regs(lreg, rax); 2674 2675 int idivl_offset = __ corrected_idivl(rreg); 2676 add_debug_info_for_div0(idivl_offset, info); 2677 if (code == lir_irem) { 2678 move_regs(rdx, dreg); // result is in rdx 2679 } else { 2680 move_regs(rax, dreg); 2681 } 2682 } 2683 } 2684 2685 2686 void LIR_Assembler::comp_op(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Op2* op) { 2687 if (opr1->is_single_cpu()) { 2688 Register reg1 = opr1->as_register(); 2689 if (opr2->is_single_cpu()) { 2690 // cpu register - cpu register 2691 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) { 2692 __ cmpptr(reg1, opr2->as_register()); 2693 } else { 2694 assert(opr2->type() != T_OBJECT && opr2->type() != T_ARRAY, "cmp int, oop?"); 2695 __ cmpl(reg1, opr2->as_register()); 2696 } 2697 } else if (opr2->is_stack()) { 2698 // cpu register - stack 2699 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) { 2700 __ cmpptr(reg1, frame_map()->address_for_slot(opr2->single_stack_ix())); 2701 } else { 2702 __ cmpl(reg1, frame_map()->address_for_slot(opr2->single_stack_ix())); 2703 } 2704 } else if (opr2->is_constant()) { 2705 // cpu register - constant 2706 LIR_Const* c = opr2->as_constant_ptr(); 2707 if (c->type() == T_INT) { 2708 __ cmpl(reg1, c->as_jint()); 2709 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) { 2710 // In 64bit oops are single register 2711 jobject o = c->as_jobject(); 2712 if (o == NULL) { 2713 __ cmpptr(reg1, (int32_t)NULL_WORD); 2714 } else { 2715 #ifdef _LP64 2716 __ movoop(rscratch1, o); 2717 __ cmpptr(reg1, rscratch1); 2718 #else 2719 __ cmpoop(reg1, c->as_jobject()); 2720 #endif // _LP64 2721 } 2722 } else { 2723 ShouldNotReachHere(); 2724 } 2725 // cpu register - address 2726 } else if (opr2->is_address()) { 2727 if (op->info() != NULL) { 2728 add_debug_info_for_null_check_here(op->info()); 2729 } 2730 __ cmpl(reg1, as_Address(opr2->as_address_ptr())); 2731 } else { 2732 ShouldNotReachHere(); 2733 } 2734 2735 } else if(opr1->is_double_cpu()) { 2736 Register xlo = opr1->as_register_lo(); 2737 Register xhi = opr1->as_register_hi(); 2738 if (opr2->is_double_cpu()) { 2739 #ifdef _LP64 2740 __ cmpptr(xlo, opr2->as_register_lo()); 2741 #else 2742 // cpu register - cpu register 2743 Register ylo = opr2->as_register_lo(); 2744 Register yhi = opr2->as_register_hi(); 2745 __ subl(xlo, ylo); 2746 __ sbbl(xhi, yhi); 2747 if (condition == lir_cond_equal || condition == lir_cond_notEqual) { 2748 __ orl(xhi, xlo); 2749 } 2750 #endif // _LP64 2751 } else if (opr2->is_constant()) { 2752 // cpu register - constant 0 2753 assert(opr2->as_jlong() == (jlong)0, "only handles zero"); 2754 #ifdef _LP64 2755 __ cmpptr(xlo, (int32_t)opr2->as_jlong()); 2756 #else 2757 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "only handles equals case"); 2758 __ orl(xhi, xlo); 2759 #endif // _LP64 2760 } else { 2761 ShouldNotReachHere(); 2762 } 2763 2764 } else if (opr1->is_single_xmm()) { 2765 XMMRegister reg1 = opr1->as_xmm_float_reg(); 2766 if (opr2->is_single_xmm()) { 2767 // xmm register - xmm register 2768 __ ucomiss(reg1, opr2->as_xmm_float_reg()); 2769 } else if (opr2->is_stack()) { 2770 // xmm register - stack 2771 __ ucomiss(reg1, frame_map()->address_for_slot(opr2->single_stack_ix())); 2772 } else if (opr2->is_constant()) { 2773 // xmm register - constant 2774 __ ucomiss(reg1, InternalAddress(float_constant(opr2->as_jfloat()))); 2775 } else if (opr2->is_address()) { 2776 // xmm register - address 2777 if (op->info() != NULL) { 2778 add_debug_info_for_null_check_here(op->info()); 2779 } 2780 __ ucomiss(reg1, as_Address(opr2->as_address_ptr())); 2781 } else { 2782 ShouldNotReachHere(); 2783 } 2784 2785 } else if (opr1->is_double_xmm()) { 2786 XMMRegister reg1 = opr1->as_xmm_double_reg(); 2787 if (opr2->is_double_xmm()) { 2788 // xmm register - xmm register 2789 __ ucomisd(reg1, opr2->as_xmm_double_reg()); 2790 } else if (opr2->is_stack()) { 2791 // xmm register - stack 2792 __ ucomisd(reg1, frame_map()->address_for_slot(opr2->double_stack_ix())); 2793 } else if (opr2->is_constant()) { 2794 // xmm register - constant 2795 __ ucomisd(reg1, InternalAddress(double_constant(opr2->as_jdouble()))); 2796 } else if (opr2->is_address()) { 2797 // xmm register - address 2798 if (op->info() != NULL) { 2799 add_debug_info_for_null_check_here(op->info()); 2800 } 2801 __ ucomisd(reg1, as_Address(opr2->pointer()->as_address())); 2802 } else { 2803 ShouldNotReachHere(); 2804 } 2805 2806 } else if(opr1->is_single_fpu() || opr1->is_double_fpu()) { 2807 assert(opr1->is_fpu_register() && opr1->fpu() == 0, "currently left-hand side must be on TOS (relax this restriction)"); 2808 assert(opr2->is_fpu_register(), "both must be registers"); 2809 __ fcmp(noreg, opr2->fpu(), op->fpu_pop_count() > 0, op->fpu_pop_count() > 1); 2810 2811 } else if (opr1->is_address() && opr2->is_constant()) { 2812 LIR_Const* c = opr2->as_constant_ptr(); 2813 #ifdef _LP64 2814 if (c->type() == T_OBJECT || c->type() == T_ARRAY) { 2815 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "need to reverse"); 2816 __ movoop(rscratch1, c->as_jobject()); 2817 } 2818 #endif // LP64 2819 if (op->info() != NULL) { 2820 add_debug_info_for_null_check_here(op->info()); 2821 } 2822 // special case: address - constant 2823 LIR_Address* addr = opr1->as_address_ptr(); 2824 if (c->type() == T_INT) { 2825 __ cmpl(as_Address(addr), c->as_jint()); 2826 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) { 2827 #ifdef _LP64 2828 // %%% Make this explode if addr isn't reachable until we figure out a 2829 // better strategy by giving noreg as the temp for as_Address 2830 __ cmpptr(rscratch1, as_Address(addr, noreg)); 2831 #else 2832 __ cmpoop(as_Address(addr), c->as_jobject()); 2833 #endif // _LP64 2834 } else { 2835 ShouldNotReachHere(); 2836 } 2837 2838 } else { 2839 ShouldNotReachHere(); 2840 } 2841 } 2842 2843 void LIR_Assembler::comp_fl2i(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst, LIR_Op2* op) { 2844 if (code == lir_cmp_fd2i || code == lir_ucmp_fd2i) { 2845 if (left->is_single_xmm()) { 2846 assert(right->is_single_xmm(), "must match"); 2847 __ cmpss2int(left->as_xmm_float_reg(), right->as_xmm_float_reg(), dst->as_register(), code == lir_ucmp_fd2i); 2848 } else if (left->is_double_xmm()) { 2849 assert(right->is_double_xmm(), "must match"); 2850 __ cmpsd2int(left->as_xmm_double_reg(), right->as_xmm_double_reg(), dst->as_register(), code == lir_ucmp_fd2i); 2851 2852 } else { 2853 assert(left->is_single_fpu() || left->is_double_fpu(), "must be"); 2854 assert(right->is_single_fpu() || right->is_double_fpu(), "must match"); 2855 2856 assert(left->fpu() == 0, "left must be on TOS"); 2857 __ fcmp2int(dst->as_register(), code == lir_ucmp_fd2i, right->fpu(), 2858 op->fpu_pop_count() > 0, op->fpu_pop_count() > 1); 2859 } 2860 } else { 2861 assert(code == lir_cmp_l2i, "check"); 2862 #ifdef _LP64 2863 Label done; 2864 Register dest = dst->as_register(); 2865 __ cmpptr(left->as_register_lo(), right->as_register_lo()); 2866 __ movl(dest, -1); 2867 __ jccb(Assembler::less, done); 2868 __ set_byte_if_not_zero(dest); 2869 __ movzbl(dest, dest); 2870 __ bind(done); 2871 #else 2872 __ lcmp2int(left->as_register_hi(), 2873 left->as_register_lo(), 2874 right->as_register_hi(), 2875 right->as_register_lo()); 2876 move_regs(left->as_register_hi(), dst->as_register()); 2877 #endif // _LP64 2878 } 2879 } 2880 2881 2882 void LIR_Assembler::align_call(LIR_Code code) { 2883 if (os::is_MP()) { 2884 // make sure that the displacement word of the call ends up word aligned 2885 int offset = __ offset(); 2886 switch (code) { 2887 case lir_static_call: 2888 case lir_optvirtual_call: 2889 case lir_dynamic_call: 2890 offset += NativeCall::displacement_offset; 2891 break; 2892 case lir_icvirtual_call: 2893 offset += NativeCall::displacement_offset + NativeMovConstReg::instruction_size; 2894 break; 2895 case lir_virtual_call: // currently, sparc-specific for niagara 2896 default: ShouldNotReachHere(); 2897 } 2898 while (offset++ % BytesPerWord != 0) { 2899 __ nop(); 2900 } 2901 } 2902 } 2903 2904 2905 void LIR_Assembler::call(LIR_OpJavaCall* op, relocInfo::relocType rtype) { 2906 assert(!os::is_MP() || (__ offset() + NativeCall::displacement_offset) % BytesPerWord == 0, 2907 "must be aligned"); 2908 __ call(AddressLiteral(op->addr(), rtype)); 2909 add_call_info(code_offset(), op->info()); 2910 } 2911 2912 2913 void LIR_Assembler::ic_call(LIR_OpJavaCall* op) { 2914 RelocationHolder rh = virtual_call_Relocation::spec(pc()); 2915 __ movoop(IC_Klass, (jobject)Universe::non_oop_word()); 2916 assert(!os::is_MP() || 2917 (__ offset() + NativeCall::displacement_offset) % BytesPerWord == 0, 2918 "must be aligned"); 2919 __ call(AddressLiteral(op->addr(), rh)); 2920 add_call_info(code_offset(), op->info()); 2921 } 2922 2923 2924 /* Currently, vtable-dispatch is only enabled for sparc platforms */ 2925 void LIR_Assembler::vtable_call(LIR_OpJavaCall* op) { 2926 ShouldNotReachHere(); 2927 } 2928 2929 2930 void LIR_Assembler::emit_static_call_stub() { 2931 address call_pc = __ pc(); 2932 address stub = __ start_a_stub(call_stub_size); 2933 if (stub == NULL) { 2934 bailout("static call stub overflow"); 2935 return; 2936 } 2937 2938 int start = __ offset(); 2939 if (os::is_MP()) { 2940 // make sure that the displacement word of the call ends up word aligned 2941 int offset = __ offset() + NativeMovConstReg::instruction_size + NativeCall::displacement_offset; 2942 while (offset++ % BytesPerWord != 0) { 2943 __ nop(); 2944 } 2945 } 2946 __ relocate(static_stub_Relocation::spec(call_pc)); 2947 __ movoop(rbx, (jobject)NULL); 2948 // must be set to -1 at code generation time 2949 assert(!os::is_MP() || ((__ offset() + 1) % BytesPerWord) == 0, "must be aligned on MP"); 2950 // On 64bit this will die since it will take a movq & jmp, must be only a jmp 2951 __ jump(RuntimeAddress(__ pc())); 2952 2953 assert(__ offset() - start <= call_stub_size, "stub too big"); 2954 __ end_a_stub(); 2955 } 2956 2957 2958 void LIR_Assembler::throw_op(LIR_Opr exceptionPC, LIR_Opr exceptionOop, CodeEmitInfo* info) { 2959 assert(exceptionOop->as_register() == rax, "must match"); 2960 assert(exceptionPC->as_register() == rdx, "must match"); 2961 2962 // exception object is not added to oop map by LinearScan 2963 // (LinearScan assumes that no oops are in fixed registers) 2964 info->add_register_oop(exceptionOop); 2965 Runtime1::StubID unwind_id; 2966 2967 // get current pc information 2968 // pc is only needed if the method has an exception handler, the unwind code does not need it. 2969 int pc_for_athrow_offset = __ offset(); 2970 InternalAddress pc_for_athrow(__ pc()); 2971 __ lea(exceptionPC->as_register(), pc_for_athrow); 2972 add_call_info(pc_for_athrow_offset, info); // for exception handler 2973 2974 __ verify_not_null_oop(rax); 2975 // search an exception handler (rax: exception oop, rdx: throwing pc) 2976 if (compilation()->has_fpu_code()) { 2977 unwind_id = Runtime1::handle_exception_id; 2978 } else { 2979 unwind_id = Runtime1::handle_exception_nofpu_id; 2980 } 2981 __ call(RuntimeAddress(Runtime1::entry_for(unwind_id))); 2982 2983 // enough room for two byte trap 2984 __ nop(); 2985 } 2986 2987 2988 void LIR_Assembler::unwind_op(LIR_Opr exceptionOop) { 2989 assert(exceptionOop->as_register() == rax, "must match"); 2990 2991 __ jmp(_unwind_handler_entry); 2992 } 2993 2994 2995 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, LIR_Opr count, LIR_Opr dest, LIR_Opr tmp) { 2996 2997 // optimized version for linear scan: 2998 // * count must be already in ECX (guaranteed by LinearScan) 2999 // * left and dest must be equal 3000 // * tmp must be unused 3001 assert(count->as_register() == SHIFT_count, "count must be in ECX"); 3002 assert(left == dest, "left and dest must be equal"); 3003 assert(tmp->is_illegal(), "wasting a register if tmp is allocated"); 3004 3005 if (left->is_single_cpu()) { 3006 Register value = left->as_register(); 3007 assert(value != SHIFT_count, "left cannot be ECX"); 3008 3009 switch (code) { 3010 case lir_shl: __ shll(value); break; 3011 case lir_shr: __ sarl(value); break; 3012 case lir_ushr: __ shrl(value); break; 3013 default: ShouldNotReachHere(); 3014 } 3015 } else if (left->is_double_cpu()) { 3016 Register lo = left->as_register_lo(); 3017 Register hi = left->as_register_hi(); 3018 assert(lo != SHIFT_count && hi != SHIFT_count, "left cannot be ECX"); 3019 #ifdef _LP64 3020 switch (code) { 3021 case lir_shl: __ shlptr(lo); break; 3022 case lir_shr: __ sarptr(lo); break; 3023 case lir_ushr: __ shrptr(lo); break; 3024 default: ShouldNotReachHere(); 3025 } 3026 #else 3027 3028 switch (code) { 3029 case lir_shl: __ lshl(hi, lo); break; 3030 case lir_shr: __ lshr(hi, lo, true); break; 3031 case lir_ushr: __ lshr(hi, lo, false); break; 3032 default: ShouldNotReachHere(); 3033 } 3034 #endif // LP64 3035 } else { 3036 ShouldNotReachHere(); 3037 } 3038 } 3039 3040 3041 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, jint count, LIR_Opr dest) { 3042 if (dest->is_single_cpu()) { 3043 // first move left into dest so that left is not destroyed by the shift 3044 Register value = dest->as_register(); 3045 count = count & 0x1F; // Java spec 3046 3047 move_regs(left->as_register(), value); 3048 switch (code) { 3049 case lir_shl: __ shll(value, count); break; 3050 case lir_shr: __ sarl(value, count); break; 3051 case lir_ushr: __ shrl(value, count); break; 3052 default: ShouldNotReachHere(); 3053 } 3054 } else if (dest->is_double_cpu()) { 3055 #ifndef _LP64 3056 Unimplemented(); 3057 #else 3058 // first move left into dest so that left is not destroyed by the shift 3059 Register value = dest->as_register_lo(); 3060 count = count & 0x1F; // Java spec 3061 3062 move_regs(left->as_register_lo(), value); 3063 switch (code) { 3064 case lir_shl: __ shlptr(value, count); break; 3065 case lir_shr: __ sarptr(value, count); break; 3066 case lir_ushr: __ shrptr(value, count); break; 3067 default: ShouldNotReachHere(); 3068 } 3069 #endif // _LP64 3070 } else { 3071 ShouldNotReachHere(); 3072 } 3073 } 3074 3075 3076 void LIR_Assembler::store_parameter(Register r, int offset_from_rsp_in_words) { 3077 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 3078 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 3079 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 3080 __ movptr (Address(rsp, offset_from_rsp_in_bytes), r); 3081 } 3082 3083 3084 void LIR_Assembler::store_parameter(jint c, int offset_from_rsp_in_words) { 3085 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 3086 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 3087 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 3088 __ movptr (Address(rsp, offset_from_rsp_in_bytes), c); 3089 } 3090 3091 3092 void LIR_Assembler::store_parameter(jobject o, int offset_from_rsp_in_words) { 3093 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 3094 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 3095 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 3096 __ movoop (Address(rsp, offset_from_rsp_in_bytes), o); 3097 } 3098 3099 3100 // This code replaces a call to arraycopy; no exception may 3101 // be thrown in this code, they must be thrown in the System.arraycopy 3102 // activation frame; we could save some checks if this would not be the case 3103 void LIR_Assembler::emit_arraycopy(LIR_OpArrayCopy* op) { 3104 ciArrayKlass* default_type = op->expected_type(); 3105 Register src = op->src()->as_register(); 3106 Register dst = op->dst()->as_register(); 3107 Register src_pos = op->src_pos()->as_register(); 3108 Register dst_pos = op->dst_pos()->as_register(); 3109 Register length = op->length()->as_register(); 3110 Register tmp = op->tmp()->as_register(); 3111 3112 CodeStub* stub = op->stub(); 3113 int flags = op->flags(); 3114 BasicType basic_type = default_type != NULL ? default_type->element_type()->basic_type() : T_ILLEGAL; 3115 if (basic_type == T_ARRAY) basic_type = T_OBJECT; 3116 3117 // if we don't know anything or it's an object array, just go through the generic arraycopy 3118 if (default_type == NULL) { 3119 Label done; 3120 // save outgoing arguments on stack in case call to System.arraycopy is needed 3121 // HACK ALERT. This code used to push the parameters in a hardwired fashion 3122 // for interpreter calling conventions. Now we have to do it in new style conventions. 3123 // For the moment until C1 gets the new register allocator I just force all the 3124 // args to the right place (except the register args) and then on the back side 3125 // reload the register args properly if we go slow path. Yuck 3126 3127 // These are proper for the calling convention 3128 3129 store_parameter(length, 2); 3130 store_parameter(dst_pos, 1); 3131 store_parameter(dst, 0); 3132 3133 // these are just temporary placements until we need to reload 3134 store_parameter(src_pos, 3); 3135 store_parameter(src, 4); 3136 NOT_LP64(assert(src == rcx && src_pos == rdx, "mismatch in calling convention");) 3137 3138 address entry = CAST_FROM_FN_PTR(address, Runtime1::arraycopy); 3139 3140 // pass arguments: may push as this is not a safepoint; SP must be fix at each safepoint 3141 #ifdef _LP64 3142 // The arguments are in java calling convention so we can trivially shift them to C 3143 // convention 3144 assert_different_registers(c_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4); 3145 __ mov(c_rarg0, j_rarg0); 3146 assert_different_registers(c_rarg1, j_rarg2, j_rarg3, j_rarg4); 3147 __ mov(c_rarg1, j_rarg1); 3148 assert_different_registers(c_rarg2, j_rarg3, j_rarg4); 3149 __ mov(c_rarg2, j_rarg2); 3150 assert_different_registers(c_rarg3, j_rarg4); 3151 __ mov(c_rarg3, j_rarg3); 3152 #ifdef _WIN64 3153 // Allocate abi space for args but be sure to keep stack aligned 3154 __ subptr(rsp, 6*wordSize); 3155 store_parameter(j_rarg4, 4); 3156 __ call(RuntimeAddress(entry)); 3157 __ addptr(rsp, 6*wordSize); 3158 #else 3159 __ mov(c_rarg4, j_rarg4); 3160 __ call(RuntimeAddress(entry)); 3161 #endif // _WIN64 3162 #else 3163 __ push(length); 3164 __ push(dst_pos); 3165 __ push(dst); 3166 __ push(src_pos); 3167 __ push(src); 3168 __ call_VM_leaf(entry, 5); // removes pushed parameter from the stack 3169 3170 #endif // _LP64 3171 3172 __ cmpl(rax, 0); 3173 __ jcc(Assembler::equal, *stub->continuation()); 3174 3175 // Reload values from the stack so they are where the stub 3176 // expects them. 3177 __ movptr (dst, Address(rsp, 0*BytesPerWord)); 3178 __ movptr (dst_pos, Address(rsp, 1*BytesPerWord)); 3179 __ movptr (length, Address(rsp, 2*BytesPerWord)); 3180 __ movptr (src_pos, Address(rsp, 3*BytesPerWord)); 3181 __ movptr (src, Address(rsp, 4*BytesPerWord)); 3182 __ jmp(*stub->entry()); 3183 3184 __ bind(*stub->continuation()); 3185 return; 3186 } 3187 3188 assert(default_type != NULL && default_type->is_array_klass() && default_type->is_loaded(), "must be true at this point"); 3189 3190 int elem_size = type2aelembytes(basic_type); 3191 int shift_amount; 3192 Address::ScaleFactor scale; 3193 3194 switch (elem_size) { 3195 case 1 : 3196 shift_amount = 0; 3197 scale = Address::times_1; 3198 break; 3199 case 2 : 3200 shift_amount = 1; 3201 scale = Address::times_2; 3202 break; 3203 case 4 : 3204 shift_amount = 2; 3205 scale = Address::times_4; 3206 break; 3207 case 8 : 3208 shift_amount = 3; 3209 scale = Address::times_8; 3210 break; 3211 default: 3212 ShouldNotReachHere(); 3213 } 3214 3215 Address src_length_addr = Address(src, arrayOopDesc::length_offset_in_bytes()); 3216 Address dst_length_addr = Address(dst, arrayOopDesc::length_offset_in_bytes()); 3217 Address src_klass_addr = Address(src, oopDesc::klass_offset_in_bytes()); 3218 Address dst_klass_addr = Address(dst, oopDesc::klass_offset_in_bytes()); 3219 3220 // length and pos's are all sign extended at this point on 64bit 3221 3222 // test for NULL 3223 if (flags & LIR_OpArrayCopy::src_null_check) { 3224 __ testptr(src, src); 3225 __ jcc(Assembler::zero, *stub->entry()); 3226 } 3227 if (flags & LIR_OpArrayCopy::dst_null_check) { 3228 __ testptr(dst, dst); 3229 __ jcc(Assembler::zero, *stub->entry()); 3230 } 3231 3232 // check if negative 3233 if (flags & LIR_OpArrayCopy::src_pos_positive_check) { 3234 __ testl(src_pos, src_pos); 3235 __ jcc(Assembler::less, *stub->entry()); 3236 } 3237 if (flags & LIR_OpArrayCopy::dst_pos_positive_check) { 3238 __ testl(dst_pos, dst_pos); 3239 __ jcc(Assembler::less, *stub->entry()); 3240 } 3241 if (flags & LIR_OpArrayCopy::length_positive_check) { 3242 __ testl(length, length); 3243 __ jcc(Assembler::less, *stub->entry()); 3244 } 3245 3246 if (flags & LIR_OpArrayCopy::src_range_check) { 3247 __ lea(tmp, Address(src_pos, length, Address::times_1, 0)); 3248 __ cmpl(tmp, src_length_addr); 3249 __ jcc(Assembler::above, *stub->entry()); 3250 } 3251 if (flags & LIR_OpArrayCopy::dst_range_check) { 3252 __ lea(tmp, Address(dst_pos, length, Address::times_1, 0)); 3253 __ cmpl(tmp, dst_length_addr); 3254 __ jcc(Assembler::above, *stub->entry()); 3255 } 3256 3257 if (flags & LIR_OpArrayCopy::type_check) { 3258 if (UseCompressedOops) { 3259 __ movl(tmp, src_klass_addr); 3260 __ cmpl(tmp, dst_klass_addr); 3261 } else { 3262 __ movptr(tmp, src_klass_addr); 3263 __ cmpptr(tmp, dst_klass_addr); 3264 } 3265 __ jcc(Assembler::notEqual, *stub->entry()); 3266 } 3267 3268 #ifdef ASSERT 3269 if (basic_type != T_OBJECT || !(flags & LIR_OpArrayCopy::type_check)) { 3270 // Sanity check the known type with the incoming class. For the 3271 // primitive case the types must match exactly with src.klass and 3272 // dst.klass each exactly matching the default type. For the 3273 // object array case, if no type check is needed then either the 3274 // dst type is exactly the expected type and the src type is a 3275 // subtype which we can't check or src is the same array as dst 3276 // but not necessarily exactly of type default_type. 3277 Label known_ok, halt; 3278 __ movoop(tmp, default_type->constant_encoding()); 3279 #ifdef _LP64 3280 if (UseCompressedOops) { 3281 __ encode_heap_oop(tmp); 3282 } 3283 #endif 3284 3285 if (basic_type != T_OBJECT) { 3286 3287 if (UseCompressedOops) __ cmpl(tmp, dst_klass_addr); 3288 else __ cmpptr(tmp, dst_klass_addr); 3289 __ jcc(Assembler::notEqual, halt); 3290 if (UseCompressedOops) __ cmpl(tmp, src_klass_addr); 3291 else __ cmpptr(tmp, src_klass_addr); 3292 __ jcc(Assembler::equal, known_ok); 3293 } else { 3294 if (UseCompressedOops) __ cmpl(tmp, dst_klass_addr); 3295 else __ cmpptr(tmp, dst_klass_addr); 3296 __ jcc(Assembler::equal, known_ok); 3297 __ cmpptr(src, dst); 3298 __ jcc(Assembler::equal, known_ok); 3299 } 3300 __ bind(halt); 3301 __ stop("incorrect type information in arraycopy"); 3302 __ bind(known_ok); 3303 } 3304 #endif 3305 3306 if (shift_amount > 0 && basic_type != T_OBJECT) { 3307 __ shlptr(length, shift_amount); 3308 } 3309 3310 #ifdef _LP64 3311 assert_different_registers(c_rarg0, dst, dst_pos, length); 3312 __ movl2ptr(src_pos, src_pos); //higher 32bits must be null 3313 __ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3314 assert_different_registers(c_rarg1, length); 3315 __ movl2ptr(dst_pos, dst_pos); //higher 32bits must be null 3316 __ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3317 __ mov(c_rarg2, length); 3318 3319 #else 3320 __ lea(tmp, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3321 store_parameter(tmp, 0); 3322 __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3323 store_parameter(tmp, 1); 3324 store_parameter(length, 2); 3325 #endif // _LP64 3326 if (basic_type == T_OBJECT) { 3327 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Runtime1::oop_arraycopy), 0); 3328 } else { 3329 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Runtime1::primitive_arraycopy), 0); 3330 } 3331 3332 __ bind(*stub->continuation()); 3333 } 3334 3335 3336 void LIR_Assembler::emit_lock(LIR_OpLock* op) { 3337 Register obj = op->obj_opr()->as_register(); // may not be an oop 3338 Register hdr = op->hdr_opr()->as_register(); 3339 Register lock = op->lock_opr()->as_register(); 3340 if (!UseFastLocking) { 3341 __ jmp(*op->stub()->entry()); 3342 } else if (op->code() == lir_lock) { 3343 Register scratch = noreg; 3344 if (UseBiasedLocking) { 3345 scratch = op->scratch_opr()->as_register(); 3346 } 3347 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header"); 3348 // add debug info for NullPointerException only if one is possible 3349 int null_check_offset = __ lock_object(hdr, obj, lock, scratch, *op->stub()->entry()); 3350 if (op->info() != NULL) { 3351 add_debug_info_for_null_check(null_check_offset, op->info()); 3352 } 3353 // done 3354 } else if (op->code() == lir_unlock) { 3355 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header"); 3356 __ unlock_object(hdr, obj, lock, *op->stub()->entry()); 3357 } else { 3358 Unimplemented(); 3359 } 3360 __ bind(*op->stub()->continuation()); 3361 } 3362 3363 3364 void LIR_Assembler::emit_profile_call(LIR_OpProfileCall* op) { 3365 ciMethod* method = op->profiled_method(); 3366 int bci = op->profiled_bci(); 3367 3368 // Update counter for all call types 3369 ciMethodData* md = method->method_data_or_null(); 3370 assert(md != NULL, "Sanity"); 3371 ciProfileData* data = md->bci_to_data(bci); 3372 assert(data->is_CounterData(), "need CounterData for calls"); 3373 assert(op->mdo()->is_single_cpu(), "mdo must be allocated"); 3374 Register mdo = op->mdo()->as_register(); 3375 __ movoop(mdo, md->constant_encoding()); 3376 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset())); 3377 Bytecodes::Code bc = method->java_code_at_bci(bci); 3378 // Perform additional virtual call profiling for invokevirtual and 3379 // invokeinterface bytecodes 3380 if ((bc == Bytecodes::_invokevirtual || bc == Bytecodes::_invokeinterface) && 3381 C1ProfileVirtualCalls) { 3382 assert(op->recv()->is_single_cpu(), "recv must be allocated"); 3383 Register recv = op->recv()->as_register(); 3384 assert_different_registers(mdo, recv); 3385 assert(data->is_VirtualCallData(), "need VirtualCallData for virtual calls"); 3386 ciKlass* known_klass = op->known_holder(); 3387 if (C1OptimizeVirtualCallProfiling && known_klass != NULL) { 3388 // We know the type that will be seen at this call site; we can 3389 // statically update the methodDataOop rather than needing to do 3390 // dynamic tests on the receiver type 3391 3392 // NOTE: we should probably put a lock around this search to 3393 // avoid collisions by concurrent compilations 3394 ciVirtualCallData* vc_data = (ciVirtualCallData*) data; 3395 uint i; 3396 for (i = 0; i < VirtualCallData::row_limit(); i++) { 3397 ciKlass* receiver = vc_data->receiver(i); 3398 if (known_klass->equals(receiver)) { 3399 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i))); 3400 __ addptr(data_addr, DataLayout::counter_increment); 3401 return; 3402 } 3403 } 3404 3405 // Receiver type not found in profile data; select an empty slot 3406 3407 // Note that this is less efficient than it should be because it 3408 // always does a write to the receiver part of the 3409 // VirtualCallData rather than just the first time 3410 for (i = 0; i < VirtualCallData::row_limit(); i++) { 3411 ciKlass* receiver = vc_data->receiver(i); 3412 if (receiver == NULL) { 3413 Address recv_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_offset(i))); 3414 __ movoop(recv_addr, known_klass->constant_encoding()); 3415 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i))); 3416 __ addptr(data_addr, DataLayout::counter_increment); 3417 return; 3418 } 3419 } 3420 } else { 3421 __ load_klass(recv, recv); 3422 Label update_done; 3423 type_profile_helper(mdo, md, data, recv, &update_done); 3424 // Receiver did not match any saved receiver and there is no empty row for it. 3425 // Increment total counter to indicate polymorphic case. 3426 __ addptr(counter_addr, DataLayout::counter_increment); 3427 3428 __ bind(update_done); 3429 } 3430 } else { 3431 // Static call 3432 __ addptr(counter_addr, DataLayout::counter_increment); 3433 } 3434 } 3435 3436 void LIR_Assembler::emit_delay(LIR_OpDelay*) { 3437 Unimplemented(); 3438 } 3439 3440 3441 void LIR_Assembler::monitor_address(int monitor_no, LIR_Opr dst) { 3442 __ lea(dst->as_register(), frame_map()->address_for_monitor_lock(monitor_no)); 3443 } 3444 3445 3446 void LIR_Assembler::align_backward_branch_target() { 3447 __ align(BytesPerWord); 3448 } 3449 3450 3451 void LIR_Assembler::negate(LIR_Opr left, LIR_Opr dest) { 3452 if (left->is_single_cpu()) { 3453 __ negl(left->as_register()); 3454 move_regs(left->as_register(), dest->as_register()); 3455 3456 } else if (left->is_double_cpu()) { 3457 Register lo = left->as_register_lo(); 3458 #ifdef _LP64 3459 Register dst = dest->as_register_lo(); 3460 __ movptr(dst, lo); 3461 __ negptr(dst); 3462 #else 3463 Register hi = left->as_register_hi(); 3464 __ lneg(hi, lo); 3465 if (dest->as_register_lo() == hi) { 3466 assert(dest->as_register_hi() != lo, "destroying register"); 3467 move_regs(hi, dest->as_register_hi()); 3468 move_regs(lo, dest->as_register_lo()); 3469 } else { 3470 move_regs(lo, dest->as_register_lo()); 3471 move_regs(hi, dest->as_register_hi()); 3472 } 3473 #endif // _LP64 3474 3475 } else if (dest->is_single_xmm()) { 3476 if (left->as_xmm_float_reg() != dest->as_xmm_float_reg()) { 3477 __ movflt(dest->as_xmm_float_reg(), left->as_xmm_float_reg()); 3478 } 3479 __ xorps(dest->as_xmm_float_reg(), 3480 ExternalAddress((address)float_signflip_pool)); 3481 3482 } else if (dest->is_double_xmm()) { 3483 if (left->as_xmm_double_reg() != dest->as_xmm_double_reg()) { 3484 __ movdbl(dest->as_xmm_double_reg(), left->as_xmm_double_reg()); 3485 } 3486 __ xorpd(dest->as_xmm_double_reg(), 3487 ExternalAddress((address)double_signflip_pool)); 3488 3489 } else if (left->is_single_fpu() || left->is_double_fpu()) { 3490 assert(left->fpu() == 0, "arg must be on TOS"); 3491 assert(dest->fpu() == 0, "dest must be TOS"); 3492 __ fchs(); 3493 3494 } else { 3495 ShouldNotReachHere(); 3496 } 3497 } 3498 3499 3500 void LIR_Assembler::leal(LIR_Opr addr, LIR_Opr dest) { 3501 assert(addr->is_address() && dest->is_register(), "check"); 3502 Register reg; 3503 reg = dest->as_pointer_register(); 3504 __ lea(reg, as_Address(addr->as_address_ptr())); 3505 } 3506 3507 3508 3509 void LIR_Assembler::rt_call(LIR_Opr result, address dest, const LIR_OprList* args, LIR_Opr tmp, CodeEmitInfo* info) { 3510 assert(!tmp->is_valid(), "don't need temporary"); 3511 __ call(RuntimeAddress(dest)); 3512 if (info != NULL) { 3513 add_call_info_here(info); 3514 } 3515 } 3516 3517 3518 void LIR_Assembler::volatile_move_op(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info) { 3519 assert(type == T_LONG, "only for volatile long fields"); 3520 3521 if (info != NULL) { 3522 add_debug_info_for_null_check_here(info); 3523 } 3524 3525 if (src->is_double_xmm()) { 3526 if (dest->is_double_cpu()) { 3527 #ifdef _LP64 3528 __ movdq(dest->as_register_lo(), src->as_xmm_double_reg()); 3529 #else 3530 __ movdl(dest->as_register_lo(), src->as_xmm_double_reg()); 3531 __ psrlq(src->as_xmm_double_reg(), 32); 3532 __ movdl(dest->as_register_hi(), src->as_xmm_double_reg()); 3533 #endif // _LP64 3534 } else if (dest->is_double_stack()) { 3535 __ movdbl(frame_map()->address_for_slot(dest->double_stack_ix()), src->as_xmm_double_reg()); 3536 } else if (dest->is_address()) { 3537 __ movdbl(as_Address(dest->as_address_ptr()), src->as_xmm_double_reg()); 3538 } else { 3539 ShouldNotReachHere(); 3540 } 3541 3542 } else if (dest->is_double_xmm()) { 3543 if (src->is_double_stack()) { 3544 __ movdbl(dest->as_xmm_double_reg(), frame_map()->address_for_slot(src->double_stack_ix())); 3545 } else if (src->is_address()) { 3546 __ movdbl(dest->as_xmm_double_reg(), as_Address(src->as_address_ptr())); 3547 } else { 3548 ShouldNotReachHere(); 3549 } 3550 3551 } else if (src->is_double_fpu()) { 3552 assert(src->fpu_regnrLo() == 0, "must be TOS"); 3553 if (dest->is_double_stack()) { 3554 __ fistp_d(frame_map()->address_for_slot(dest->double_stack_ix())); 3555 } else if (dest->is_address()) { 3556 __ fistp_d(as_Address(dest->as_address_ptr())); 3557 } else { 3558 ShouldNotReachHere(); 3559 } 3560 3561 } else if (dest->is_double_fpu()) { 3562 assert(dest->fpu_regnrLo() == 0, "must be TOS"); 3563 if (src->is_double_stack()) { 3564 __ fild_d(frame_map()->address_for_slot(src->double_stack_ix())); 3565 } else if (src->is_address()) { 3566 __ fild_d(as_Address(src->as_address_ptr())); 3567 } else { 3568 ShouldNotReachHere(); 3569 } 3570 } else { 3571 ShouldNotReachHere(); 3572 } 3573 } 3574 3575 3576 void LIR_Assembler::membar() { 3577 // QQQ sparc TSO uses this, 3578 __ membar( Assembler::Membar_mask_bits(Assembler::StoreLoad)); 3579 } 3580 3581 void LIR_Assembler::membar_acquire() { 3582 // No x86 machines currently require load fences 3583 // __ load_fence(); 3584 } 3585 3586 void LIR_Assembler::membar_release() { 3587 // No x86 machines currently require store fences 3588 // __ store_fence(); 3589 } 3590 3591 void LIR_Assembler::get_thread(LIR_Opr result_reg) { 3592 assert(result_reg->is_register(), "check"); 3593 #ifdef _LP64 3594 // __ get_thread(result_reg->as_register_lo()); 3595 __ mov(result_reg->as_register(), r15_thread); 3596 #else 3597 __ get_thread(result_reg->as_register()); 3598 #endif // _LP64 3599 } 3600 3601 3602 void LIR_Assembler::peephole(LIR_List*) { 3603 // do nothing for now 3604 } 3605 3606 3607 #undef __