1 /* 2 * Copyright (c) 2000, 2015, 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 "asm/macroAssembler.hpp" 27 #include "asm/macroAssembler.inline.hpp" 28 #include "c1/c1_Compilation.hpp" 29 #include "c1/c1_LIRAssembler.hpp" 30 #include "c1/c1_MacroAssembler.hpp" 31 #include "c1/c1_Runtime1.hpp" 32 #include "c1/c1_ValueStack.hpp" 33 #include "ci/ciArrayKlass.hpp" 34 #include "ci/ciInstance.hpp" 35 #include "gc/shared/barrierSet.hpp" 36 #include "gc/shared/cardTableModRefBS.hpp" 37 #include "gc/shared/collectedHeap.hpp" 38 #include "nativeInst_x86.hpp" 39 #include "oops/objArrayKlass.hpp" 40 #include "runtime/sharedRuntime.hpp" 41 #include "vmreg_x86.inline.hpp" 42 43 44 // These masks are used to provide 128-bit aligned bitmasks to the XMM 45 // instructions, to allow sign-masking or sign-bit flipping. They allow 46 // fast versions of NegF/NegD and AbsF/AbsD. 47 48 // Note: 'double' and 'long long' have 32-bits alignment on x86. 49 static jlong* double_quadword(jlong *adr, jlong lo, jlong hi) { 50 // Use the expression (adr)&(~0xF) to provide 128-bits aligned address 51 // of 128-bits operands for SSE instructions. 52 jlong *operand = (jlong*)(((intptr_t)adr) & ((intptr_t)(~0xF))); 53 // Store the value to a 128-bits operand. 54 operand[0] = lo; 55 operand[1] = hi; 56 return operand; 57 } 58 59 // Buffer for 128-bits masks used by SSE instructions. 60 static jlong fp_signmask_pool[(4+1)*2]; // 4*128bits(data) + 128bits(alignment) 61 62 // Static initialization during VM startup. 63 static jlong *float_signmask_pool = double_quadword(&fp_signmask_pool[1*2], CONST64(0x7FFFFFFF7FFFFFFF), CONST64(0x7FFFFFFF7FFFFFFF)); 64 static jlong *double_signmask_pool = double_quadword(&fp_signmask_pool[2*2], CONST64(0x7FFFFFFFFFFFFFFF), CONST64(0x7FFFFFFFFFFFFFFF)); 65 static jlong *float_signflip_pool = double_quadword(&fp_signmask_pool[3*2], (jlong)UCONST64(0x8000000080000000), (jlong)UCONST64(0x8000000080000000)); 66 static jlong *double_signflip_pool = double_quadword(&fp_signmask_pool[4*2], (jlong)UCONST64(0x8000000000000000), (jlong)UCONST64(0x8000000000000000)); 67 68 69 70 NEEDS_CLEANUP // remove this definitions ? 71 const Register IC_Klass = rax; // where the IC klass is cached 72 const Register SYNC_header = rax; // synchronization header 73 const Register SHIFT_count = rcx; // where count for shift operations must be 74 75 #define __ _masm-> 76 77 78 static void select_different_registers(Register preserve, 79 Register extra, 80 Register &tmp1, 81 Register &tmp2) { 82 if (tmp1 == preserve) { 83 assert_different_registers(tmp1, tmp2, extra); 84 tmp1 = extra; 85 } else if (tmp2 == preserve) { 86 assert_different_registers(tmp1, tmp2, extra); 87 tmp2 = extra; 88 } 89 assert_different_registers(preserve, tmp1, tmp2); 90 } 91 92 93 94 static void select_different_registers(Register preserve, 95 Register extra, 96 Register &tmp1, 97 Register &tmp2, 98 Register &tmp3) { 99 if (tmp1 == preserve) { 100 assert_different_registers(tmp1, tmp2, tmp3, extra); 101 tmp1 = extra; 102 } else if (tmp2 == preserve) { 103 assert_different_registers(tmp1, tmp2, tmp3, extra); 104 tmp2 = extra; 105 } else if (tmp3 == preserve) { 106 assert_different_registers(tmp1, tmp2, tmp3, extra); 107 tmp3 = extra; 108 } 109 assert_different_registers(preserve, tmp1, tmp2, tmp3); 110 } 111 112 113 114 bool LIR_Assembler::is_small_constant(LIR_Opr opr) { 115 if (opr->is_constant()) { 116 LIR_Const* constant = opr->as_constant_ptr(); 117 switch (constant->type()) { 118 case T_INT: { 119 return true; 120 } 121 122 default: 123 return false; 124 } 125 } 126 return false; 127 } 128 129 130 LIR_Opr LIR_Assembler::receiverOpr() { 131 return FrameMap::receiver_opr; 132 } 133 134 LIR_Opr LIR_Assembler::osrBufferPointer() { 135 return FrameMap::as_pointer_opr(receiverOpr()->as_register()); 136 } 137 138 //--------------fpu register translations----------------------- 139 140 141 address LIR_Assembler::float_constant(float f) { 142 address const_addr = __ float_constant(f); 143 if (const_addr == NULL) { 144 bailout("const section overflow"); 145 return __ code()->consts()->start(); 146 } else { 147 return const_addr; 148 } 149 } 150 151 152 address LIR_Assembler::double_constant(double d) { 153 address const_addr = __ double_constant(d); 154 if (const_addr == NULL) { 155 bailout("const section overflow"); 156 return __ code()->consts()->start(); 157 } else { 158 return const_addr; 159 } 160 } 161 162 163 void LIR_Assembler::set_24bit_FPU() { 164 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_24())); 165 } 166 167 void LIR_Assembler::reset_FPU() { 168 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); 169 } 170 171 void LIR_Assembler::fpop() { 172 __ fpop(); 173 } 174 175 void LIR_Assembler::fxch(int i) { 176 __ fxch(i); 177 } 178 179 void LIR_Assembler::fld(int i) { 180 __ fld_s(i); 181 } 182 183 void LIR_Assembler::ffree(int i) { 184 __ ffree(i); 185 } 186 187 void LIR_Assembler::breakpoint() { 188 __ int3(); 189 } 190 191 void LIR_Assembler::push(LIR_Opr opr) { 192 if (opr->is_single_cpu()) { 193 __ push_reg(opr->as_register()); 194 } else if (opr->is_double_cpu()) { 195 NOT_LP64(__ push_reg(opr->as_register_hi())); 196 __ push_reg(opr->as_register_lo()); 197 } else if (opr->is_stack()) { 198 __ push_addr(frame_map()->address_for_slot(opr->single_stack_ix())); 199 } else if (opr->is_constant()) { 200 LIR_Const* const_opr = opr->as_constant_ptr(); 201 if (const_opr->type() == T_OBJECT) { 202 __ push_oop(const_opr->as_jobject()); 203 } else if (const_opr->type() == T_INT) { 204 __ push_jint(const_opr->as_jint()); 205 } else { 206 ShouldNotReachHere(); 207 } 208 209 } else { 210 ShouldNotReachHere(); 211 } 212 } 213 214 void LIR_Assembler::pop(LIR_Opr opr) { 215 if (opr->is_single_cpu()) { 216 __ pop_reg(opr->as_register()); 217 } else { 218 ShouldNotReachHere(); 219 } 220 } 221 222 bool LIR_Assembler::is_literal_address(LIR_Address* addr) { 223 return addr->base()->is_illegal() && addr->index()->is_illegal(); 224 } 225 226 //------------------------------------------- 227 228 Address LIR_Assembler::as_Address(LIR_Address* addr) { 229 return as_Address(addr, rscratch1); 230 } 231 232 Address LIR_Assembler::as_Address(LIR_Address* addr, Register tmp) { 233 if (addr->base()->is_illegal()) { 234 assert(addr->index()->is_illegal(), "must be illegal too"); 235 AddressLiteral laddr((address)addr->disp(), relocInfo::none); 236 if (! __ reachable(laddr)) { 237 __ movptr(tmp, laddr.addr()); 238 Address res(tmp, 0); 239 return res; 240 } else { 241 return __ as_Address(laddr); 242 } 243 } 244 245 Register base = addr->base()->as_pointer_register(); 246 247 if (addr->index()->is_illegal()) { 248 return Address( base, addr->disp()); 249 } else if (addr->index()->is_cpu_register()) { 250 Register index = addr->index()->as_pointer_register(); 251 return Address(base, index, (Address::ScaleFactor) addr->scale(), addr->disp()); 252 } else if (addr->index()->is_constant()) { 253 intptr_t addr_offset = (addr->index()->as_constant_ptr()->as_jint() << addr->scale()) + addr->disp(); 254 assert(Assembler::is_simm32(addr_offset), "must be"); 255 256 return Address(base, addr_offset); 257 } else { 258 Unimplemented(); 259 return Address(); 260 } 261 } 262 263 264 Address LIR_Assembler::as_Address_hi(LIR_Address* addr) { 265 Address base = as_Address(addr); 266 return Address(base._base, base._index, base._scale, base._disp + BytesPerWord); 267 } 268 269 270 Address LIR_Assembler::as_Address_lo(LIR_Address* addr) { 271 return as_Address(addr); 272 } 273 274 275 void LIR_Assembler::osr_entry() { 276 offsets()->set_value(CodeOffsets::OSR_Entry, code_offset()); 277 BlockBegin* osr_entry = compilation()->hir()->osr_entry(); 278 ValueStack* entry_state = osr_entry->state(); 279 int number_of_locks = entry_state->locks_size(); 280 281 // we jump here if osr happens with the interpreter 282 // state set up to continue at the beginning of the 283 // loop that triggered osr - in particular, we have 284 // the following registers setup: 285 // 286 // rcx: osr buffer 287 // 288 289 // build frame 290 ciMethod* m = compilation()->method(); 291 __ build_frame(initial_frame_size_in_bytes(), bang_size_in_bytes()); 292 293 // OSR buffer is 294 // 295 // locals[nlocals-1..0] 296 // monitors[0..number_of_locks] 297 // 298 // locals is a direct copy of the interpreter frame so in the osr buffer 299 // so first slot in the local array is the last local from the interpreter 300 // and last slot is local[0] (receiver) from the interpreter 301 // 302 // Similarly with locks. The first lock slot in the osr buffer is the nth lock 303 // from the interpreter frame, the nth lock slot in the osr buffer is 0th lock 304 // in the interpreter frame (the method lock if a sync method) 305 306 // Initialize monitors in the compiled activation. 307 // rcx: pointer to osr buffer 308 // 309 // All other registers are dead at this point and the locals will be 310 // copied into place by code emitted in the IR. 311 312 Register OSR_buf = osrBufferPointer()->as_pointer_register(); 313 { assert(frame::interpreter_frame_monitor_size() == BasicObjectLock::size(), "adjust code below"); 314 int monitor_offset = BytesPerWord * method()->max_locals() + 315 (2 * BytesPerWord) * (number_of_locks - 1); 316 // SharedRuntime::OSR_migration_begin() packs BasicObjectLocks in 317 // the OSR buffer using 2 word entries: first the lock and then 318 // the oop. 319 for (int i = 0; i < number_of_locks; i++) { 320 int slot_offset = monitor_offset - ((i * 2) * BytesPerWord); 321 #ifdef ASSERT 322 // verify the interpreter's monitor has a non-null object 323 { 324 Label L; 325 __ cmpptr(Address(OSR_buf, slot_offset + 1*BytesPerWord), (int32_t)NULL_WORD); 326 __ jcc(Assembler::notZero, L); 327 __ stop("locked object is NULL"); 328 __ bind(L); 329 } 330 #endif 331 __ movptr(rbx, Address(OSR_buf, slot_offset + 0)); 332 __ movptr(frame_map()->address_for_monitor_lock(i), rbx); 333 __ movptr(rbx, Address(OSR_buf, slot_offset + 1*BytesPerWord)); 334 __ movptr(frame_map()->address_for_monitor_object(i), rbx); 335 } 336 } 337 } 338 339 340 // inline cache check; done before the frame is built. 341 int LIR_Assembler::check_icache() { 342 Register receiver = FrameMap::receiver_opr->as_register(); 343 Register ic_klass = IC_Klass; 344 const int ic_cmp_size = LP64_ONLY(10) NOT_LP64(9); 345 const bool do_post_padding = VerifyOops || UseCompressedClassPointers; 346 if (!do_post_padding) { 347 // insert some nops so that the verified entry point is aligned on CodeEntryAlignment 348 __ align(CodeEntryAlignment, __ offset() + ic_cmp_size); 349 } 350 int offset = __ offset(); 351 __ inline_cache_check(receiver, IC_Klass); 352 assert(__ offset() % CodeEntryAlignment == 0 || do_post_padding, "alignment must be correct"); 353 if (do_post_padding) { 354 // force alignment after the cache check. 355 // It's been verified to be aligned if !VerifyOops 356 __ align(CodeEntryAlignment); 357 } 358 return offset; 359 } 360 361 362 void LIR_Assembler::jobject2reg_with_patching(Register reg, CodeEmitInfo* info) { 363 jobject o = NULL; 364 PatchingStub* patch = new PatchingStub(_masm, patching_id(info)); 365 __ movoop(reg, o); 366 patching_epilog(patch, lir_patch_normal, reg, info); 367 } 368 369 void LIR_Assembler::klass2reg_with_patching(Register reg, CodeEmitInfo* info) { 370 Metadata* o = NULL; 371 PatchingStub* patch = new PatchingStub(_masm, PatchingStub::load_klass_id); 372 __ mov_metadata(reg, o); 373 patching_epilog(patch, lir_patch_normal, reg, info); 374 } 375 376 // This specifies the rsp decrement needed to build the frame 377 int LIR_Assembler::initial_frame_size_in_bytes() const { 378 // if rounding, must let FrameMap know! 379 380 // The frame_map records size in slots (32bit word) 381 382 // subtract two words to account for return address and link 383 return (frame_map()->framesize() - (2*VMRegImpl::slots_per_word)) * VMRegImpl::stack_slot_size; 384 } 385 386 387 int LIR_Assembler::emit_exception_handler() { 388 // if the last instruction is a call (typically to do a throw which 389 // is coming at the end after block reordering) the return address 390 // must still point into the code area in order to avoid assertion 391 // failures when searching for the corresponding bci => add a nop 392 // (was bug 5/14/1999 - gri) 393 __ nop(); 394 395 // generate code for exception handler 396 address handler_base = __ start_a_stub(exception_handler_size); 397 if (handler_base == NULL) { 398 // not enough space left for the handler 399 bailout("exception handler overflow"); 400 return -1; 401 } 402 403 int offset = code_offset(); 404 405 // the exception oop and pc are in rax, and rdx 406 // no other registers need to be preserved, so invalidate them 407 __ invalidate_registers(false, true, true, false, true, true); 408 409 // check that there is really an exception 410 __ verify_not_null_oop(rax); 411 412 // search an exception handler (rax: exception oop, rdx: throwing pc) 413 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::handle_exception_from_callee_id))); 414 __ should_not_reach_here(); 415 guarantee(code_offset() - offset <= exception_handler_size, "overflow"); 416 __ end_a_stub(); 417 418 return offset; 419 } 420 421 422 // Emit the code to remove the frame from the stack in the exception 423 // unwind path. 424 int LIR_Assembler::emit_unwind_handler() { 425 #ifndef PRODUCT 426 if (CommentedAssembly) { 427 _masm->block_comment("Unwind handler"); 428 } 429 #endif 430 431 int offset = code_offset(); 432 433 // Fetch the exception from TLS and clear out exception related thread state 434 Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread); 435 NOT_LP64(__ get_thread(rsi)); 436 __ movptr(rax, Address(thread, JavaThread::exception_oop_offset())); 437 __ movptr(Address(thread, JavaThread::exception_oop_offset()), (intptr_t)NULL_WORD); 438 __ movptr(Address(thread, JavaThread::exception_pc_offset()), (intptr_t)NULL_WORD); 439 440 __ bind(_unwind_handler_entry); 441 __ verify_not_null_oop(rax); 442 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) { 443 __ mov(rbx, rax); // Preserve the exception (rbx is always callee-saved) 444 } 445 446 // Preform needed unlocking 447 MonitorExitStub* stub = NULL; 448 if (method()->is_synchronized()) { 449 monitor_address(0, FrameMap::rax_opr); 450 stub = new MonitorExitStub(FrameMap::rax_opr, true, 0); 451 __ unlock_object(rdi, rsi, rax, *stub->entry()); 452 __ bind(*stub->continuation()); 453 } 454 455 if (compilation()->env()->dtrace_method_probes()) { 456 #ifdef _LP64 457 __ mov(rdi, r15_thread); 458 __ mov_metadata(rsi, method()->constant_encoding()); 459 #else 460 __ get_thread(rax); 461 __ movptr(Address(rsp, 0), rax); 462 __ mov_metadata(Address(rsp, sizeof(void*)), method()->constant_encoding()); 463 #endif 464 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit))); 465 } 466 467 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) { 468 __ mov(rax, rbx); // Restore the exception 469 } 470 471 // remove the activation and dispatch to the unwind handler 472 __ remove_frame(initial_frame_size_in_bytes()); 473 __ jump(RuntimeAddress(Runtime1::entry_for(Runtime1::unwind_exception_id))); 474 475 // Emit the slow path assembly 476 if (stub != NULL) { 477 stub->emit_code(this); 478 } 479 480 return offset; 481 } 482 483 484 int LIR_Assembler::emit_deopt_handler() { 485 // if the last instruction is a call (typically to do a throw which 486 // is coming at the end after block reordering) the return address 487 // must still point into the code area in order to avoid assertion 488 // failures when searching for the corresponding bci => add a nop 489 // (was bug 5/14/1999 - gri) 490 __ nop(); 491 492 // generate code for exception handler 493 address handler_base = __ start_a_stub(deopt_handler_size); 494 if (handler_base == NULL) { 495 // not enough space left for the handler 496 bailout("deopt handler overflow"); 497 return -1; 498 } 499 500 int offset = code_offset(); 501 InternalAddress here(__ pc()); 502 503 __ pushptr(here.addr()); 504 __ jump(RuntimeAddress(SharedRuntime::deopt_blob()->unpack())); 505 guarantee(code_offset() - offset <= deopt_handler_size, "overflow"); 506 __ end_a_stub(); 507 508 return offset; 509 } 510 511 512 void LIR_Assembler::return_op(LIR_Opr result) { 513 assert(result->is_illegal() || !result->is_single_cpu() || result->as_register() == rax, "word returns are in rax,"); 514 if (!result->is_illegal() && result->is_float_kind() && !result->is_xmm_register()) { 515 assert(result->fpu() == 0, "result must already be on TOS"); 516 } 517 518 // Pop the stack before the safepoint code 519 __ remove_frame(initial_frame_size_in_bytes()); 520 521 bool result_is_oop = result->is_valid() ? result->is_oop() : false; 522 523 // Note: we do not need to round double result; float result has the right precision 524 // the poll sets the condition code, but no data registers 525 AddressLiteral polling_page(os::get_polling_page(), relocInfo::poll_return_type); 526 527 if (Assembler::is_polling_page_far()) { 528 __ lea(rscratch1, polling_page); 529 __ relocate(relocInfo::poll_return_type); 530 __ testl(rax, Address(rscratch1, 0)); 531 } else { 532 __ testl(rax, polling_page); 533 } 534 __ ret(0); 535 } 536 537 538 int LIR_Assembler::safepoint_poll(LIR_Opr tmp, CodeEmitInfo* info) { 539 AddressLiteral polling_page(os::get_polling_page(), relocInfo::poll_type); 540 guarantee(info != NULL, "Shouldn't be NULL"); 541 int offset = __ offset(); 542 if (Assembler::is_polling_page_far()) { 543 __ lea(rscratch1, polling_page); 544 offset = __ offset(); 545 add_debug_info_for_branch(info); 546 __ relocate(relocInfo::poll_type); 547 __ testl(rax, Address(rscratch1, 0)); 548 } else { 549 add_debug_info_for_branch(info); 550 __ testl(rax, polling_page); 551 } 552 return offset; 553 } 554 555 556 void LIR_Assembler::move_regs(Register from_reg, Register to_reg) { 557 if (from_reg != to_reg) __ mov(to_reg, from_reg); 558 } 559 560 void LIR_Assembler::swap_reg(Register a, Register b) { 561 __ xchgptr(a, b); 562 } 563 564 565 void LIR_Assembler::const2reg(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) { 566 assert(src->is_constant(), "should not call otherwise"); 567 assert(dest->is_register(), "should not call otherwise"); 568 LIR_Const* c = src->as_constant_ptr(); 569 570 switch (c->type()) { 571 case T_INT: { 572 assert(patch_code == lir_patch_none, "no patching handled here"); 573 __ movl(dest->as_register(), c->as_jint()); 574 break; 575 } 576 577 case T_ADDRESS: { 578 assert(patch_code == lir_patch_none, "no patching handled here"); 579 __ movptr(dest->as_register(), c->as_jint()); 580 break; 581 } 582 583 case T_LONG: { 584 assert(patch_code == lir_patch_none, "no patching handled here"); 585 #ifdef _LP64 586 __ movptr(dest->as_register_lo(), (intptr_t)c->as_jlong()); 587 #else 588 __ movptr(dest->as_register_lo(), c->as_jint_lo()); 589 __ movptr(dest->as_register_hi(), c->as_jint_hi()); 590 #endif // _LP64 591 break; 592 } 593 594 case T_OBJECT: { 595 if (patch_code != lir_patch_none) { 596 jobject2reg_with_patching(dest->as_register(), info); 597 } else { 598 __ movoop(dest->as_register(), c->as_jobject()); 599 } 600 break; 601 } 602 603 case T_METADATA: { 604 if (patch_code != lir_patch_none) { 605 klass2reg_with_patching(dest->as_register(), info); 606 } else { 607 __ mov_metadata(dest->as_register(), c->as_metadata()); 608 } 609 break; 610 } 611 612 case T_FLOAT: { 613 if (dest->is_single_xmm()) { 614 if (c->is_zero_float()) { 615 __ xorps(dest->as_xmm_float_reg(), dest->as_xmm_float_reg()); 616 } else { 617 __ movflt(dest->as_xmm_float_reg(), 618 InternalAddress(float_constant(c->as_jfloat()))); 619 } 620 } else { 621 assert(dest->is_single_fpu(), "must be"); 622 assert(dest->fpu_regnr() == 0, "dest must be TOS"); 623 if (c->is_zero_float()) { 624 __ fldz(); 625 } else if (c->is_one_float()) { 626 __ fld1(); 627 } else { 628 __ fld_s (InternalAddress(float_constant(c->as_jfloat()))); 629 } 630 } 631 break; 632 } 633 634 case T_DOUBLE: { 635 if (dest->is_double_xmm()) { 636 if (c->is_zero_double()) { 637 __ xorpd(dest->as_xmm_double_reg(), dest->as_xmm_double_reg()); 638 } else { 639 __ movdbl(dest->as_xmm_double_reg(), 640 InternalAddress(double_constant(c->as_jdouble()))); 641 } 642 } else { 643 assert(dest->is_double_fpu(), "must be"); 644 assert(dest->fpu_regnrLo() == 0, "dest must be TOS"); 645 if (c->is_zero_double()) { 646 __ fldz(); 647 } else if (c->is_one_double()) { 648 __ fld1(); 649 } else { 650 __ fld_d (InternalAddress(double_constant(c->as_jdouble()))); 651 } 652 } 653 break; 654 } 655 656 default: 657 ShouldNotReachHere(); 658 } 659 } 660 661 void LIR_Assembler::const2stack(LIR_Opr src, LIR_Opr dest) { 662 assert(src->is_constant(), "should not call otherwise"); 663 assert(dest->is_stack(), "should not call otherwise"); 664 LIR_Const* c = src->as_constant_ptr(); 665 666 switch (c->type()) { 667 case T_INT: // fall through 668 case T_FLOAT: 669 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits()); 670 break; 671 672 case T_ADDRESS: 673 __ movptr(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits()); 674 break; 675 676 case T_OBJECT: 677 __ movoop(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jobject()); 678 break; 679 680 case T_LONG: // fall through 681 case T_DOUBLE: 682 #ifdef _LP64 683 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(), 684 lo_word_offset_in_bytes), (intptr_t)c->as_jlong_bits()); 685 #else 686 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(), 687 lo_word_offset_in_bytes), c->as_jint_lo_bits()); 688 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(), 689 hi_word_offset_in_bytes), c->as_jint_hi_bits()); 690 #endif // _LP64 691 break; 692 693 default: 694 ShouldNotReachHere(); 695 } 696 } 697 698 void LIR_Assembler::const2mem(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info, bool wide) { 699 assert(src->is_constant(), "should not call otherwise"); 700 assert(dest->is_address(), "should not call otherwise"); 701 LIR_Const* c = src->as_constant_ptr(); 702 LIR_Address* addr = dest->as_address_ptr(); 703 704 int null_check_here = code_offset(); 705 switch (type) { 706 case T_INT: // fall through 707 case T_FLOAT: 708 __ movl(as_Address(addr), c->as_jint_bits()); 709 break; 710 711 case T_ADDRESS: 712 __ movptr(as_Address(addr), c->as_jint_bits()); 713 break; 714 715 case T_OBJECT: // fall through 716 case T_ARRAY: 717 if (c->as_jobject() == NULL) { 718 if (UseCompressedOops && !wide) { 719 __ movl(as_Address(addr), (int32_t)NULL_WORD); 720 } else { 721 #ifdef _LP64 722 __ xorptr(rscratch1, rscratch1); 723 null_check_here = code_offset(); 724 __ movptr(as_Address(addr), rscratch1); 725 #else 726 __ movptr(as_Address(addr), NULL_WORD); 727 #endif 728 } 729 } else { 730 if (is_literal_address(addr)) { 731 ShouldNotReachHere(); 732 __ movoop(as_Address(addr, noreg), c->as_jobject()); 733 } else { 734 #ifdef _LP64 735 __ movoop(rscratch1, c->as_jobject()); 736 if (UseCompressedOops && !wide) { 737 __ encode_heap_oop(rscratch1); 738 null_check_here = code_offset(); 739 __ movl(as_Address_lo(addr), rscratch1); 740 } else { 741 null_check_here = code_offset(); 742 __ movptr(as_Address_lo(addr), rscratch1); 743 } 744 #else 745 __ movoop(as_Address(addr), c->as_jobject()); 746 #endif 747 } 748 } 749 break; 750 751 case T_LONG: // fall through 752 case T_DOUBLE: 753 #ifdef _LP64 754 if (is_literal_address(addr)) { 755 ShouldNotReachHere(); 756 __ movptr(as_Address(addr, r15_thread), (intptr_t)c->as_jlong_bits()); 757 } else { 758 __ movptr(r10, (intptr_t)c->as_jlong_bits()); 759 null_check_here = code_offset(); 760 __ movptr(as_Address_lo(addr), r10); 761 } 762 #else 763 // Always reachable in 32bit so this doesn't produce useless move literal 764 __ movptr(as_Address_hi(addr), c->as_jint_hi_bits()); 765 __ movptr(as_Address_lo(addr), c->as_jint_lo_bits()); 766 #endif // _LP64 767 break; 768 769 case T_BOOLEAN: // fall through 770 case T_BYTE: 771 __ movb(as_Address(addr), c->as_jint() & 0xFF); 772 break; 773 774 case T_CHAR: // fall through 775 case T_SHORT: 776 __ movw(as_Address(addr), c->as_jint() & 0xFFFF); 777 break; 778 779 default: 780 ShouldNotReachHere(); 781 }; 782 783 if (info != NULL) { 784 add_debug_info_for_null_check(null_check_here, info); 785 } 786 } 787 788 789 void LIR_Assembler::reg2reg(LIR_Opr src, LIR_Opr dest) { 790 assert(src->is_register(), "should not call otherwise"); 791 assert(dest->is_register(), "should not call otherwise"); 792 793 // move between cpu-registers 794 if (dest->is_single_cpu()) { 795 #ifdef _LP64 796 if (src->type() == T_LONG) { 797 // Can do LONG -> OBJECT 798 move_regs(src->as_register_lo(), dest->as_register()); 799 return; 800 } 801 #endif 802 assert(src->is_single_cpu(), "must match"); 803 if (src->type() == T_OBJECT) { 804 __ verify_oop(src->as_register()); 805 } 806 move_regs(src->as_register(), dest->as_register()); 807 808 } else if (dest->is_double_cpu()) { 809 #ifdef _LP64 810 if (src->type() == T_OBJECT || src->type() == T_ARRAY) { 811 // Surprising to me but we can see move of a long to t_object 812 __ verify_oop(src->as_register()); 813 move_regs(src->as_register(), dest->as_register_lo()); 814 return; 815 } 816 #endif 817 assert(src->is_double_cpu(), "must match"); 818 Register f_lo = src->as_register_lo(); 819 Register f_hi = src->as_register_hi(); 820 Register t_lo = dest->as_register_lo(); 821 Register t_hi = dest->as_register_hi(); 822 #ifdef _LP64 823 assert(f_hi == f_lo, "must be same"); 824 assert(t_hi == t_lo, "must be same"); 825 move_regs(f_lo, t_lo); 826 #else 827 assert(f_lo != f_hi && t_lo != t_hi, "invalid register allocation"); 828 829 830 if (f_lo == t_hi && f_hi == t_lo) { 831 swap_reg(f_lo, f_hi); 832 } else if (f_hi == t_lo) { 833 assert(f_lo != t_hi, "overwriting register"); 834 move_regs(f_hi, t_hi); 835 move_regs(f_lo, t_lo); 836 } else { 837 assert(f_hi != t_lo, "overwriting register"); 838 move_regs(f_lo, t_lo); 839 move_regs(f_hi, t_hi); 840 } 841 #endif // LP64 842 843 // special moves from fpu-register to xmm-register 844 // necessary for method results 845 } else if (src->is_single_xmm() && !dest->is_single_xmm()) { 846 __ movflt(Address(rsp, 0), src->as_xmm_float_reg()); 847 __ fld_s(Address(rsp, 0)); 848 } else if (src->is_double_xmm() && !dest->is_double_xmm()) { 849 __ movdbl(Address(rsp, 0), src->as_xmm_double_reg()); 850 __ fld_d(Address(rsp, 0)); 851 } else if (dest->is_single_xmm() && !src->is_single_xmm()) { 852 __ fstp_s(Address(rsp, 0)); 853 __ movflt(dest->as_xmm_float_reg(), Address(rsp, 0)); 854 } else if (dest->is_double_xmm() && !src->is_double_xmm()) { 855 __ fstp_d(Address(rsp, 0)); 856 __ movdbl(dest->as_xmm_double_reg(), Address(rsp, 0)); 857 858 // move between xmm-registers 859 } else if (dest->is_single_xmm()) { 860 assert(src->is_single_xmm(), "must match"); 861 __ movflt(dest->as_xmm_float_reg(), src->as_xmm_float_reg()); 862 } else if (dest->is_double_xmm()) { 863 assert(src->is_double_xmm(), "must match"); 864 __ movdbl(dest->as_xmm_double_reg(), src->as_xmm_double_reg()); 865 866 // move between fpu-registers (no instruction necessary because of fpu-stack) 867 } else if (dest->is_single_fpu() || dest->is_double_fpu()) { 868 assert(src->is_single_fpu() || src->is_double_fpu(), "must match"); 869 assert(src->fpu() == dest->fpu(), "currently should be nothing to do"); 870 } else { 871 ShouldNotReachHere(); 872 } 873 } 874 875 void LIR_Assembler::reg2stack(LIR_Opr src, LIR_Opr dest, BasicType type, bool pop_fpu_stack) { 876 assert(src->is_register(), "should not call otherwise"); 877 assert(dest->is_stack(), "should not call otherwise"); 878 879 if (src->is_single_cpu()) { 880 Address dst = frame_map()->address_for_slot(dest->single_stack_ix()); 881 if (type == T_OBJECT || type == T_ARRAY) { 882 __ verify_oop(src->as_register()); 883 __ movptr (dst, src->as_register()); 884 } else if (type == T_METADATA) { 885 __ movptr (dst, src->as_register()); 886 } else { 887 __ movl (dst, src->as_register()); 888 } 889 890 } else if (src->is_double_cpu()) { 891 Address dstLO = frame_map()->address_for_slot(dest->double_stack_ix(), lo_word_offset_in_bytes); 892 Address dstHI = frame_map()->address_for_slot(dest->double_stack_ix(), hi_word_offset_in_bytes); 893 __ movptr (dstLO, src->as_register_lo()); 894 NOT_LP64(__ movptr (dstHI, src->as_register_hi())); 895 896 } else if (src->is_single_xmm()) { 897 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix()); 898 __ movflt(dst_addr, src->as_xmm_float_reg()); 899 900 } else if (src->is_double_xmm()) { 901 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix()); 902 __ movdbl(dst_addr, src->as_xmm_double_reg()); 903 904 } else if (src->is_single_fpu()) { 905 assert(src->fpu_regnr() == 0, "argument must be on TOS"); 906 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix()); 907 if (pop_fpu_stack) __ fstp_s (dst_addr); 908 else __ fst_s (dst_addr); 909 910 } else if (src->is_double_fpu()) { 911 assert(src->fpu_regnrLo() == 0, "argument must be on TOS"); 912 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix()); 913 if (pop_fpu_stack) __ fstp_d (dst_addr); 914 else __ fst_d (dst_addr); 915 916 } else { 917 ShouldNotReachHere(); 918 } 919 } 920 921 922 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 */) { 923 LIR_Address* to_addr = dest->as_address_ptr(); 924 PatchingStub* patch = NULL; 925 Register compressed_src = rscratch1; 926 927 if (type == T_ARRAY || type == T_OBJECT) { 928 __ verify_oop(src->as_register()); 929 #ifdef _LP64 930 if (UseCompressedOops && !wide) { 931 __ movptr(compressed_src, src->as_register()); 932 __ encode_heap_oop(compressed_src); 933 if (patch_code != lir_patch_none) { 934 info->oop_map()->set_narrowoop(compressed_src->as_VMReg()); 935 } 936 } 937 #endif 938 } 939 940 if (patch_code != lir_patch_none) { 941 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 942 Address toa = as_Address(to_addr); 943 assert(toa.disp() != 0, "must have"); 944 } 945 946 int null_check_here = code_offset(); 947 switch (type) { 948 case T_FLOAT: { 949 if (src->is_single_xmm()) { 950 __ movflt(as_Address(to_addr), src->as_xmm_float_reg()); 951 } else { 952 assert(src->is_single_fpu(), "must be"); 953 assert(src->fpu_regnr() == 0, "argument must be on TOS"); 954 if (pop_fpu_stack) __ fstp_s(as_Address(to_addr)); 955 else __ fst_s (as_Address(to_addr)); 956 } 957 break; 958 } 959 960 case T_DOUBLE: { 961 if (src->is_double_xmm()) { 962 __ movdbl(as_Address(to_addr), src->as_xmm_double_reg()); 963 } else { 964 assert(src->is_double_fpu(), "must be"); 965 assert(src->fpu_regnrLo() == 0, "argument must be on TOS"); 966 if (pop_fpu_stack) __ fstp_d(as_Address(to_addr)); 967 else __ fst_d (as_Address(to_addr)); 968 } 969 break; 970 } 971 972 case T_ARRAY: // fall through 973 case T_OBJECT: // fall through 974 if (UseCompressedOops && !wide) { 975 __ movl(as_Address(to_addr), compressed_src); 976 } else { 977 __ movptr(as_Address(to_addr), src->as_register()); 978 } 979 break; 980 case T_METADATA: 981 // We get here to store a method pointer to the stack to pass to 982 // a dtrace runtime call. This can't work on 64 bit with 983 // compressed klass ptrs: T_METADATA can be a compressed klass 984 // ptr or a 64 bit method pointer. 985 LP64_ONLY(ShouldNotReachHere()); 986 __ movptr(as_Address(to_addr), src->as_register()); 987 break; 988 case T_ADDRESS: 989 __ movptr(as_Address(to_addr), src->as_register()); 990 break; 991 case T_INT: 992 __ movl(as_Address(to_addr), src->as_register()); 993 break; 994 995 case T_LONG: { 996 Register from_lo = src->as_register_lo(); 997 Register from_hi = src->as_register_hi(); 998 #ifdef _LP64 999 __ movptr(as_Address_lo(to_addr), from_lo); 1000 #else 1001 Register base = to_addr->base()->as_register(); 1002 Register index = noreg; 1003 if (to_addr->index()->is_register()) { 1004 index = to_addr->index()->as_register(); 1005 } 1006 if (base == from_lo || index == from_lo) { 1007 assert(base != from_hi, "can't be"); 1008 assert(index == noreg || (index != base && index != from_hi), "can't handle this"); 1009 __ movl(as_Address_hi(to_addr), from_hi); 1010 if (patch != NULL) { 1011 patching_epilog(patch, lir_patch_high, base, info); 1012 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1013 patch_code = lir_patch_low; 1014 } 1015 __ movl(as_Address_lo(to_addr), from_lo); 1016 } else { 1017 assert(index == noreg || (index != base && index != from_lo), "can't handle this"); 1018 __ movl(as_Address_lo(to_addr), from_lo); 1019 if (patch != NULL) { 1020 patching_epilog(patch, lir_patch_low, base, info); 1021 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1022 patch_code = lir_patch_high; 1023 } 1024 __ movl(as_Address_hi(to_addr), from_hi); 1025 } 1026 #endif // _LP64 1027 break; 1028 } 1029 1030 case T_BYTE: // fall through 1031 case T_BOOLEAN: { 1032 Register src_reg = src->as_register(); 1033 Address dst_addr = as_Address(to_addr); 1034 assert(VM_Version::is_P6() || src_reg->has_byte_register(), "must use byte registers if not P6"); 1035 __ movb(dst_addr, src_reg); 1036 break; 1037 } 1038 1039 case T_CHAR: // fall through 1040 case T_SHORT: 1041 __ movw(as_Address(to_addr), src->as_register()); 1042 break; 1043 1044 default: 1045 ShouldNotReachHere(); 1046 } 1047 if (info != NULL) { 1048 add_debug_info_for_null_check(null_check_here, info); 1049 } 1050 1051 if (patch_code != lir_patch_none) { 1052 patching_epilog(patch, patch_code, to_addr->base()->as_register(), info); 1053 } 1054 } 1055 1056 1057 void LIR_Assembler::stack2reg(LIR_Opr src, LIR_Opr dest, BasicType type) { 1058 assert(src->is_stack(), "should not call otherwise"); 1059 assert(dest->is_register(), "should not call otherwise"); 1060 1061 if (dest->is_single_cpu()) { 1062 if (type == T_ARRAY || type == T_OBJECT) { 1063 __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix())); 1064 __ verify_oop(dest->as_register()); 1065 } else if (type == T_METADATA) { 1066 __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix())); 1067 } else { 1068 __ movl(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix())); 1069 } 1070 1071 } else if (dest->is_double_cpu()) { 1072 Address src_addr_LO = frame_map()->address_for_slot(src->double_stack_ix(), lo_word_offset_in_bytes); 1073 Address src_addr_HI = frame_map()->address_for_slot(src->double_stack_ix(), hi_word_offset_in_bytes); 1074 __ movptr(dest->as_register_lo(), src_addr_LO); 1075 NOT_LP64(__ movptr(dest->as_register_hi(), src_addr_HI)); 1076 1077 } else if (dest->is_single_xmm()) { 1078 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix()); 1079 __ movflt(dest->as_xmm_float_reg(), src_addr); 1080 1081 } else if (dest->is_double_xmm()) { 1082 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix()); 1083 __ movdbl(dest->as_xmm_double_reg(), src_addr); 1084 1085 } else if (dest->is_single_fpu()) { 1086 assert(dest->fpu_regnr() == 0, "dest must be TOS"); 1087 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix()); 1088 __ fld_s(src_addr); 1089 1090 } else if (dest->is_double_fpu()) { 1091 assert(dest->fpu_regnrLo() == 0, "dest must be TOS"); 1092 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix()); 1093 __ fld_d(src_addr); 1094 1095 } else { 1096 ShouldNotReachHere(); 1097 } 1098 } 1099 1100 1101 void LIR_Assembler::stack2stack(LIR_Opr src, LIR_Opr dest, BasicType type) { 1102 if (src->is_single_stack()) { 1103 if (type == T_OBJECT || type == T_ARRAY) { 1104 __ pushptr(frame_map()->address_for_slot(src ->single_stack_ix())); 1105 __ popptr (frame_map()->address_for_slot(dest->single_stack_ix())); 1106 } else { 1107 #ifndef _LP64 1108 __ pushl(frame_map()->address_for_slot(src ->single_stack_ix())); 1109 __ popl (frame_map()->address_for_slot(dest->single_stack_ix())); 1110 #else 1111 //no pushl on 64bits 1112 __ movl(rscratch1, frame_map()->address_for_slot(src ->single_stack_ix())); 1113 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), rscratch1); 1114 #endif 1115 } 1116 1117 } else if (src->is_double_stack()) { 1118 #ifdef _LP64 1119 __ pushptr(frame_map()->address_for_slot(src ->double_stack_ix())); 1120 __ popptr (frame_map()->address_for_slot(dest->double_stack_ix())); 1121 #else 1122 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 0)); 1123 // push and pop the part at src + wordSize, adding wordSize for the previous push 1124 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 2 * wordSize)); 1125 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 2 * wordSize)); 1126 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 0)); 1127 #endif // _LP64 1128 1129 } else { 1130 ShouldNotReachHere(); 1131 } 1132 } 1133 1134 1135 void LIR_Assembler::mem2reg(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool wide, bool /* unaligned */) { 1136 assert(src->is_address(), "should not call otherwise"); 1137 assert(dest->is_register(), "should not call otherwise"); 1138 1139 LIR_Address* addr = src->as_address_ptr(); 1140 Address from_addr = as_Address(addr); 1141 1142 if (addr->base()->type() == T_OBJECT) { 1143 __ verify_oop(addr->base()->as_pointer_register()); 1144 } 1145 1146 switch (type) { 1147 case T_BOOLEAN: // fall through 1148 case T_BYTE: // fall through 1149 case T_CHAR: // fall through 1150 case T_SHORT: 1151 if (!VM_Version::is_P6() && !from_addr.uses(dest->as_register())) { 1152 // on pre P6 processors we may get partial register stalls 1153 // so blow away the value of to_rinfo before loading a 1154 // partial word into it. Do it here so that it precedes 1155 // the potential patch point below. 1156 __ xorptr(dest->as_register(), dest->as_register()); 1157 } 1158 break; 1159 } 1160 1161 PatchingStub* patch = NULL; 1162 if (patch_code != lir_patch_none) { 1163 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1164 assert(from_addr.disp() != 0, "must have"); 1165 } 1166 if (info != NULL) { 1167 add_debug_info_for_null_check_here(info); 1168 } 1169 1170 switch (type) { 1171 case T_FLOAT: { 1172 if (dest->is_single_xmm()) { 1173 __ movflt(dest->as_xmm_float_reg(), from_addr); 1174 } else { 1175 assert(dest->is_single_fpu(), "must be"); 1176 assert(dest->fpu_regnr() == 0, "dest must be TOS"); 1177 __ fld_s(from_addr); 1178 } 1179 break; 1180 } 1181 1182 case T_DOUBLE: { 1183 if (dest->is_double_xmm()) { 1184 __ movdbl(dest->as_xmm_double_reg(), from_addr); 1185 } else { 1186 assert(dest->is_double_fpu(), "must be"); 1187 assert(dest->fpu_regnrLo() == 0, "dest must be TOS"); 1188 __ fld_d(from_addr); 1189 } 1190 break; 1191 } 1192 1193 case T_OBJECT: // fall through 1194 case T_ARRAY: // fall through 1195 if (UseCompressedOops && !wide) { 1196 __ movl(dest->as_register(), from_addr); 1197 } else { 1198 __ movptr(dest->as_register(), from_addr); 1199 } 1200 break; 1201 1202 case T_ADDRESS: 1203 if (UseCompressedClassPointers && addr->disp() == oopDesc::klass_offset_in_bytes()) { 1204 __ movl(dest->as_register(), from_addr); 1205 } else { 1206 __ movptr(dest->as_register(), from_addr); 1207 } 1208 break; 1209 case T_INT: 1210 __ movl(dest->as_register(), from_addr); 1211 break; 1212 1213 case T_LONG: { 1214 Register to_lo = dest->as_register_lo(); 1215 Register to_hi = dest->as_register_hi(); 1216 #ifdef _LP64 1217 __ movptr(to_lo, as_Address_lo(addr)); 1218 #else 1219 Register base = addr->base()->as_register(); 1220 Register index = noreg; 1221 if (addr->index()->is_register()) { 1222 index = addr->index()->as_register(); 1223 } 1224 if ((base == to_lo && index == to_hi) || 1225 (base == to_hi && index == to_lo)) { 1226 // addresses with 2 registers are only formed as a result of 1227 // array access so this code will never have to deal with 1228 // patches or null checks. 1229 assert(info == NULL && patch == NULL, "must be"); 1230 __ lea(to_hi, as_Address(addr)); 1231 __ movl(to_lo, Address(to_hi, 0)); 1232 __ movl(to_hi, Address(to_hi, BytesPerWord)); 1233 } else if (base == to_lo || index == to_lo) { 1234 assert(base != to_hi, "can't be"); 1235 assert(index == noreg || (index != base && index != to_hi), "can't handle this"); 1236 __ movl(to_hi, as_Address_hi(addr)); 1237 if (patch != NULL) { 1238 patching_epilog(patch, lir_patch_high, base, info); 1239 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1240 patch_code = lir_patch_low; 1241 } 1242 __ movl(to_lo, as_Address_lo(addr)); 1243 } else { 1244 assert(index == noreg || (index != base && index != to_lo), "can't handle this"); 1245 __ movl(to_lo, as_Address_lo(addr)); 1246 if (patch != NULL) { 1247 patching_epilog(patch, lir_patch_low, base, info); 1248 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1249 patch_code = lir_patch_high; 1250 } 1251 __ movl(to_hi, as_Address_hi(addr)); 1252 } 1253 #endif // _LP64 1254 break; 1255 } 1256 1257 case T_BOOLEAN: // fall through 1258 case T_BYTE: { 1259 Register dest_reg = dest->as_register(); 1260 assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6"); 1261 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) { 1262 __ movsbl(dest_reg, from_addr); 1263 } else { 1264 __ movb(dest_reg, from_addr); 1265 __ shll(dest_reg, 24); 1266 __ sarl(dest_reg, 24); 1267 } 1268 break; 1269 } 1270 1271 case T_CHAR: { 1272 Register dest_reg = dest->as_register(); 1273 assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6"); 1274 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) { 1275 __ movzwl(dest_reg, from_addr); 1276 } else { 1277 __ movw(dest_reg, from_addr); 1278 } 1279 break; 1280 } 1281 1282 case T_SHORT: { 1283 Register dest_reg = dest->as_register(); 1284 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) { 1285 __ movswl(dest_reg, from_addr); 1286 } else { 1287 __ movw(dest_reg, from_addr); 1288 __ shll(dest_reg, 16); 1289 __ sarl(dest_reg, 16); 1290 } 1291 break; 1292 } 1293 1294 default: 1295 ShouldNotReachHere(); 1296 } 1297 1298 if (patch != NULL) { 1299 patching_epilog(patch, patch_code, addr->base()->as_register(), info); 1300 } 1301 1302 if (type == T_ARRAY || type == T_OBJECT) { 1303 #ifdef _LP64 1304 if (UseCompressedOops && !wide) { 1305 __ decode_heap_oop(dest->as_register()); 1306 } 1307 #endif 1308 __ verify_oop(dest->as_register()); 1309 } else if (type == T_ADDRESS && addr->disp() == oopDesc::klass_offset_in_bytes()) { 1310 #ifdef _LP64 1311 if (UseCompressedClassPointers) { 1312 __ decode_klass_not_null(dest->as_register()); 1313 } 1314 #endif 1315 } 1316 } 1317 1318 1319 NEEDS_CLEANUP; // This could be static? 1320 Address::ScaleFactor LIR_Assembler::array_element_size(BasicType type) const { 1321 int elem_size = type2aelembytes(type); 1322 switch (elem_size) { 1323 case 1: return Address::times_1; 1324 case 2: return Address::times_2; 1325 case 4: return Address::times_4; 1326 case 8: return Address::times_8; 1327 } 1328 ShouldNotReachHere(); 1329 return Address::no_scale; 1330 } 1331 1332 1333 void LIR_Assembler::emit_op3(LIR_Op3* op) { 1334 switch (op->code()) { 1335 case lir_idiv: 1336 case lir_irem: 1337 arithmetic_idiv(op->code(), 1338 op->in_opr1(), 1339 op->in_opr2(), 1340 op->in_opr3(), 1341 op->result_opr(), 1342 op->info()); 1343 break; 1344 default: ShouldNotReachHere(); break; 1345 } 1346 } 1347 1348 void LIR_Assembler::emit_opBranch(LIR_OpBranch* op) { 1349 #ifdef ASSERT 1350 assert(op->block() == NULL || op->block()->label() == op->label(), "wrong label"); 1351 if (op->block() != NULL) _branch_target_blocks.append(op->block()); 1352 if (op->ublock() != NULL) _branch_target_blocks.append(op->ublock()); 1353 #endif 1354 1355 if (op->cond() == lir_cond_always) { 1356 if (op->info() != NULL) add_debug_info_for_branch(op->info()); 1357 __ jmp (*(op->label())); 1358 } else { 1359 Assembler::Condition acond = Assembler::zero; 1360 if (op->code() == lir_cond_float_branch) { 1361 assert(op->ublock() != NULL, "must have unordered successor"); 1362 __ jcc(Assembler::parity, *(op->ublock()->label())); 1363 switch(op->cond()) { 1364 case lir_cond_equal: acond = Assembler::equal; break; 1365 case lir_cond_notEqual: acond = Assembler::notEqual; break; 1366 case lir_cond_less: acond = Assembler::below; break; 1367 case lir_cond_lessEqual: acond = Assembler::belowEqual; break; 1368 case lir_cond_greaterEqual: acond = Assembler::aboveEqual; break; 1369 case lir_cond_greater: acond = Assembler::above; break; 1370 default: ShouldNotReachHere(); 1371 } 1372 } else { 1373 switch (op->cond()) { 1374 case lir_cond_equal: acond = Assembler::equal; break; 1375 case lir_cond_notEqual: acond = Assembler::notEqual; break; 1376 case lir_cond_less: acond = Assembler::less; break; 1377 case lir_cond_lessEqual: acond = Assembler::lessEqual; break; 1378 case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break; 1379 case lir_cond_greater: acond = Assembler::greater; break; 1380 case lir_cond_belowEqual: acond = Assembler::belowEqual; break; 1381 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; break; 1382 default: ShouldNotReachHere(); 1383 } 1384 } 1385 __ jcc(acond,*(op->label())); 1386 } 1387 } 1388 1389 void LIR_Assembler::emit_opConvert(LIR_OpConvert* op) { 1390 LIR_Opr src = op->in_opr(); 1391 LIR_Opr dest = op->result_opr(); 1392 1393 switch (op->bytecode()) { 1394 case Bytecodes::_i2l: 1395 #ifdef _LP64 1396 __ movl2ptr(dest->as_register_lo(), src->as_register()); 1397 #else 1398 move_regs(src->as_register(), dest->as_register_lo()); 1399 move_regs(src->as_register(), dest->as_register_hi()); 1400 __ sarl(dest->as_register_hi(), 31); 1401 #endif // LP64 1402 break; 1403 1404 case Bytecodes::_l2i: 1405 #ifdef _LP64 1406 __ movl(dest->as_register(), src->as_register_lo()); 1407 #else 1408 move_regs(src->as_register_lo(), dest->as_register()); 1409 #endif 1410 break; 1411 1412 case Bytecodes::_i2b: 1413 move_regs(src->as_register(), dest->as_register()); 1414 __ sign_extend_byte(dest->as_register()); 1415 break; 1416 1417 case Bytecodes::_i2c: 1418 move_regs(src->as_register(), dest->as_register()); 1419 __ andl(dest->as_register(), 0xFFFF); 1420 break; 1421 1422 case Bytecodes::_i2s: 1423 move_regs(src->as_register(), dest->as_register()); 1424 __ sign_extend_short(dest->as_register()); 1425 break; 1426 1427 1428 case Bytecodes::_f2d: 1429 case Bytecodes::_d2f: 1430 if (dest->is_single_xmm()) { 1431 __ cvtsd2ss(dest->as_xmm_float_reg(), src->as_xmm_double_reg()); 1432 } else if (dest->is_double_xmm()) { 1433 __ cvtss2sd(dest->as_xmm_double_reg(), src->as_xmm_float_reg()); 1434 } else { 1435 assert(src->fpu() == dest->fpu(), "register must be equal"); 1436 // do nothing (float result is rounded later through spilling) 1437 } 1438 break; 1439 1440 case Bytecodes::_i2f: 1441 case Bytecodes::_i2d: 1442 if (dest->is_single_xmm()) { 1443 __ cvtsi2ssl(dest->as_xmm_float_reg(), src->as_register()); 1444 } else if (dest->is_double_xmm()) { 1445 __ cvtsi2sdl(dest->as_xmm_double_reg(), src->as_register()); 1446 } else { 1447 assert(dest->fpu() == 0, "result must be on TOS"); 1448 __ movl(Address(rsp, 0), src->as_register()); 1449 __ fild_s(Address(rsp, 0)); 1450 } 1451 break; 1452 1453 case Bytecodes::_f2i: 1454 case Bytecodes::_d2i: 1455 if (src->is_single_xmm()) { 1456 __ cvttss2sil(dest->as_register(), src->as_xmm_float_reg()); 1457 } else if (src->is_double_xmm()) { 1458 __ cvttsd2sil(dest->as_register(), src->as_xmm_double_reg()); 1459 } else { 1460 assert(src->fpu() == 0, "input must be on TOS"); 1461 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_trunc())); 1462 __ fist_s(Address(rsp, 0)); 1463 __ movl(dest->as_register(), Address(rsp, 0)); 1464 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); 1465 } 1466 1467 // IA32 conversion instructions do not match JLS for overflow, underflow and NaN -> fixup in stub 1468 assert(op->stub() != NULL, "stub required"); 1469 __ cmpl(dest->as_register(), 0x80000000); 1470 __ jcc(Assembler::equal, *op->stub()->entry()); 1471 __ bind(*op->stub()->continuation()); 1472 break; 1473 1474 case Bytecodes::_l2f: 1475 case Bytecodes::_l2d: 1476 assert(!dest->is_xmm_register(), "result in xmm register not supported (no SSE instruction present)"); 1477 assert(dest->fpu() == 0, "result must be on TOS"); 1478 1479 __ movptr(Address(rsp, 0), src->as_register_lo()); 1480 NOT_LP64(__ movl(Address(rsp, BytesPerWord), src->as_register_hi())); 1481 __ fild_d(Address(rsp, 0)); 1482 // float result is rounded later through spilling 1483 break; 1484 1485 case Bytecodes::_f2l: 1486 case Bytecodes::_d2l: 1487 assert(!src->is_xmm_register(), "input in xmm register not supported (no SSE instruction present)"); 1488 assert(src->fpu() == 0, "input must be on TOS"); 1489 assert(dest == FrameMap::long0_opr, "runtime stub places result in these registers"); 1490 1491 // instruction sequence too long to inline it here 1492 { 1493 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::fpu2long_stub_id))); 1494 } 1495 break; 1496 1497 default: ShouldNotReachHere(); 1498 } 1499 } 1500 1501 void LIR_Assembler::emit_alloc_obj(LIR_OpAllocObj* op) { 1502 if (op->init_check()) { 1503 __ cmpb(Address(op->klass()->as_register(), 1504 InstanceKlass::init_state_offset()), 1505 InstanceKlass::fully_initialized); 1506 add_debug_info_for_null_check_here(op->stub()->info()); 1507 __ jcc(Assembler::notEqual, *op->stub()->entry()); 1508 } 1509 __ allocate_object(op->obj()->as_register(), 1510 op->tmp1()->as_register(), 1511 op->tmp2()->as_register(), 1512 op->header_size(), 1513 op->object_size(), 1514 op->klass()->as_register(), 1515 *op->stub()->entry()); 1516 __ bind(*op->stub()->continuation()); 1517 } 1518 1519 void LIR_Assembler::emit_alloc_array(LIR_OpAllocArray* op) { 1520 Register len = op->len()->as_register(); 1521 LP64_ONLY( __ movslq(len, len); ) 1522 1523 if (UseSlowPath || 1524 (!UseFastNewObjectArray && (op->type() == T_OBJECT || op->type() == T_ARRAY)) || 1525 (!UseFastNewTypeArray && (op->type() != T_OBJECT && op->type() != T_ARRAY))) { 1526 __ jmp(*op->stub()->entry()); 1527 } else { 1528 Register tmp1 = op->tmp1()->as_register(); 1529 Register tmp2 = op->tmp2()->as_register(); 1530 Register tmp3 = op->tmp3()->as_register(); 1531 if (len == tmp1) { 1532 tmp1 = tmp3; 1533 } else if (len == tmp2) { 1534 tmp2 = tmp3; 1535 } else if (len == tmp3) { 1536 // everything is ok 1537 } else { 1538 __ mov(tmp3, len); 1539 } 1540 __ allocate_array(op->obj()->as_register(), 1541 len, 1542 tmp1, 1543 tmp2, 1544 arrayOopDesc::header_size(op->type()), 1545 array_element_size(op->type()), 1546 op->klass()->as_register(), 1547 *op->stub()->entry()); 1548 } 1549 __ bind(*op->stub()->continuation()); 1550 } 1551 1552 void LIR_Assembler::type_profile_helper(Register mdo, 1553 ciMethodData *md, ciProfileData *data, 1554 Register recv, Label* update_done) { 1555 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) { 1556 Label next_test; 1557 // See if the receiver is receiver[n]. 1558 __ cmpptr(recv, Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i)))); 1559 __ jccb(Assembler::notEqual, next_test); 1560 Address data_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i))); 1561 __ addptr(data_addr, DataLayout::counter_increment); 1562 __ jmp(*update_done); 1563 __ bind(next_test); 1564 } 1565 1566 // Didn't find receiver; find next empty slot and fill it in 1567 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) { 1568 Label next_test; 1569 Address recv_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i))); 1570 __ cmpptr(recv_addr, (intptr_t)NULL_WORD); 1571 __ jccb(Assembler::notEqual, next_test); 1572 __ movptr(recv_addr, recv); 1573 __ movptr(Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i))), DataLayout::counter_increment); 1574 __ jmp(*update_done); 1575 __ bind(next_test); 1576 } 1577 } 1578 1579 void LIR_Assembler::emit_typecheck_helper(LIR_OpTypeCheck *op, Label* success, Label* failure, Label* obj_is_null) { 1580 // we always need a stub for the failure case. 1581 CodeStub* stub = op->stub(); 1582 Register obj = op->object()->as_register(); 1583 Register k_RInfo = op->tmp1()->as_register(); 1584 Register klass_RInfo = op->tmp2()->as_register(); 1585 Register dst = op->result_opr()->as_register(); 1586 ciKlass* k = op->klass(); 1587 Register Rtmp1 = noreg; 1588 1589 // check if it needs to be profiled 1590 ciMethodData* md = NULL; 1591 ciProfileData* data = NULL; 1592 1593 if (op->should_profile()) { 1594 ciMethod* method = op->profiled_method(); 1595 assert(method != NULL, "Should have method"); 1596 int bci = op->profiled_bci(); 1597 md = method->method_data_or_null(); 1598 assert(md != NULL, "Sanity"); 1599 data = md->bci_to_data(bci); 1600 assert(data != NULL, "need data for type check"); 1601 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check"); 1602 } 1603 Label profile_cast_success, profile_cast_failure; 1604 Label *success_target = op->should_profile() ? &profile_cast_success : success; 1605 Label *failure_target = op->should_profile() ? &profile_cast_failure : failure; 1606 1607 if (obj == k_RInfo) { 1608 k_RInfo = dst; 1609 } else if (obj == klass_RInfo) { 1610 klass_RInfo = dst; 1611 } 1612 if (k->is_loaded() && !UseCompressedClassPointers) { 1613 select_different_registers(obj, dst, k_RInfo, klass_RInfo); 1614 } else { 1615 Rtmp1 = op->tmp3()->as_register(); 1616 select_different_registers(obj, dst, k_RInfo, klass_RInfo, Rtmp1); 1617 } 1618 1619 assert_different_registers(obj, k_RInfo, klass_RInfo); 1620 1621 __ cmpptr(obj, (int32_t)NULL_WORD); 1622 if (op->should_profile()) { 1623 Label not_null; 1624 __ jccb(Assembler::notEqual, not_null); 1625 // Object is null; update MDO and exit 1626 Register mdo = klass_RInfo; 1627 __ mov_metadata(mdo, md->constant_encoding()); 1628 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::header_offset())); 1629 int header_bits = DataLayout::flag_mask_to_header_mask(BitData::null_seen_byte_constant()); 1630 __ orl(data_addr, header_bits); 1631 __ jmp(*obj_is_null); 1632 __ bind(not_null); 1633 } else { 1634 __ jcc(Assembler::equal, *obj_is_null); 1635 } 1636 1637 if (!k->is_loaded()) { 1638 klass2reg_with_patching(k_RInfo, op->info_for_patch()); 1639 } else { 1640 #ifdef _LP64 1641 __ mov_metadata(k_RInfo, k->constant_encoding()); 1642 #endif // _LP64 1643 } 1644 __ verify_oop(obj); 1645 1646 if (op->fast_check()) { 1647 // get object class 1648 // not a safepoint as obj null check happens earlier 1649 #ifdef _LP64 1650 if (UseCompressedClassPointers) { 1651 __ load_klass(Rtmp1, obj); 1652 __ cmpptr(k_RInfo, Rtmp1); 1653 } else { 1654 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes())); 1655 } 1656 #else 1657 if (k->is_loaded()) { 1658 __ cmpklass(Address(obj, oopDesc::klass_offset_in_bytes()), k->constant_encoding()); 1659 } else { 1660 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes())); 1661 } 1662 #endif 1663 __ jcc(Assembler::notEqual, *failure_target); 1664 // successful cast, fall through to profile or jump 1665 } else { 1666 // get object class 1667 // not a safepoint as obj null check happens earlier 1668 __ load_klass(klass_RInfo, obj); 1669 if (k->is_loaded()) { 1670 // See if we get an immediate positive hit 1671 #ifdef _LP64 1672 __ cmpptr(k_RInfo, Address(klass_RInfo, k->super_check_offset())); 1673 #else 1674 __ cmpklass(Address(klass_RInfo, k->super_check_offset()), k->constant_encoding()); 1675 #endif // _LP64 1676 if ((juint)in_bytes(Klass::secondary_super_cache_offset()) != k->super_check_offset()) { 1677 __ jcc(Assembler::notEqual, *failure_target); 1678 // successful cast, fall through to profile or jump 1679 } else { 1680 // See if we get an immediate positive hit 1681 __ jcc(Assembler::equal, *success_target); 1682 // check for self 1683 #ifdef _LP64 1684 __ cmpptr(klass_RInfo, k_RInfo); 1685 #else 1686 __ cmpklass(klass_RInfo, k->constant_encoding()); 1687 #endif // _LP64 1688 __ jcc(Assembler::equal, *success_target); 1689 1690 __ push(klass_RInfo); 1691 #ifdef _LP64 1692 __ push(k_RInfo); 1693 #else 1694 __ pushklass(k->constant_encoding()); 1695 #endif // _LP64 1696 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 1697 __ pop(klass_RInfo); 1698 __ pop(klass_RInfo); 1699 // result is a boolean 1700 __ cmpl(klass_RInfo, 0); 1701 __ jcc(Assembler::equal, *failure_target); 1702 // successful cast, fall through to profile or jump 1703 } 1704 } else { 1705 // perform the fast part of the checking logic 1706 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL); 1707 // call out-of-line instance of __ check_klass_subtype_slow_path(...): 1708 __ push(klass_RInfo); 1709 __ push(k_RInfo); 1710 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 1711 __ pop(klass_RInfo); 1712 __ pop(k_RInfo); 1713 // result is a boolean 1714 __ cmpl(k_RInfo, 0); 1715 __ jcc(Assembler::equal, *failure_target); 1716 // successful cast, fall through to profile or jump 1717 } 1718 } 1719 if (op->should_profile()) { 1720 Register mdo = klass_RInfo, recv = k_RInfo; 1721 __ bind(profile_cast_success); 1722 __ mov_metadata(mdo, md->constant_encoding()); 1723 __ load_klass(recv, obj); 1724 Label update_done; 1725 type_profile_helper(mdo, md, data, recv, success); 1726 __ jmp(*success); 1727 1728 __ bind(profile_cast_failure); 1729 __ mov_metadata(mdo, md->constant_encoding()); 1730 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset())); 1731 __ subptr(counter_addr, DataLayout::counter_increment); 1732 __ jmp(*failure); 1733 } 1734 __ jmp(*success); 1735 } 1736 1737 1738 void LIR_Assembler::emit_opTypeCheck(LIR_OpTypeCheck* op) { 1739 LIR_Code code = op->code(); 1740 if (code == lir_store_check) { 1741 Register value = op->object()->as_register(); 1742 Register array = op->array()->as_register(); 1743 Register k_RInfo = op->tmp1()->as_register(); 1744 Register klass_RInfo = op->tmp2()->as_register(); 1745 Register Rtmp1 = op->tmp3()->as_register(); 1746 1747 CodeStub* stub = op->stub(); 1748 1749 // check if it needs to be profiled 1750 ciMethodData* md = NULL; 1751 ciProfileData* data = NULL; 1752 1753 if (op->should_profile()) { 1754 ciMethod* method = op->profiled_method(); 1755 assert(method != NULL, "Should have method"); 1756 int bci = op->profiled_bci(); 1757 md = method->method_data_or_null(); 1758 assert(md != NULL, "Sanity"); 1759 data = md->bci_to_data(bci); 1760 assert(data != NULL, "need data for type check"); 1761 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check"); 1762 } 1763 Label profile_cast_success, profile_cast_failure, done; 1764 Label *success_target = op->should_profile() ? &profile_cast_success : &done; 1765 Label *failure_target = op->should_profile() ? &profile_cast_failure : stub->entry(); 1766 1767 __ cmpptr(value, (int32_t)NULL_WORD); 1768 if (op->should_profile()) { 1769 Label not_null; 1770 __ jccb(Assembler::notEqual, not_null); 1771 // Object is null; update MDO and exit 1772 Register mdo = klass_RInfo; 1773 __ mov_metadata(mdo, md->constant_encoding()); 1774 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::header_offset())); 1775 int header_bits = DataLayout::flag_mask_to_header_mask(BitData::null_seen_byte_constant()); 1776 __ orl(data_addr, header_bits); 1777 __ jmp(done); 1778 __ bind(not_null); 1779 } else { 1780 __ jcc(Assembler::equal, done); 1781 } 1782 1783 add_debug_info_for_null_check_here(op->info_for_exception()); 1784 __ load_klass(k_RInfo, array); 1785 __ load_klass(klass_RInfo, value); 1786 1787 // get instance klass (it's already uncompressed) 1788 __ movptr(k_RInfo, Address(k_RInfo, ObjArrayKlass::element_klass_offset())); 1789 // perform the fast part of the checking logic 1790 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL); 1791 // call out-of-line instance of __ check_klass_subtype_slow_path(...): 1792 __ push(klass_RInfo); 1793 __ push(k_RInfo); 1794 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 1795 __ pop(klass_RInfo); 1796 __ pop(k_RInfo); 1797 // result is a boolean 1798 __ cmpl(k_RInfo, 0); 1799 __ jcc(Assembler::equal, *failure_target); 1800 // fall through to the success case 1801 1802 if (op->should_profile()) { 1803 Register mdo = klass_RInfo, recv = k_RInfo; 1804 __ bind(profile_cast_success); 1805 __ mov_metadata(mdo, md->constant_encoding()); 1806 __ load_klass(recv, value); 1807 Label update_done; 1808 type_profile_helper(mdo, md, data, recv, &done); 1809 __ jmpb(done); 1810 1811 __ bind(profile_cast_failure); 1812 __ mov_metadata(mdo, md->constant_encoding()); 1813 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset())); 1814 __ subptr(counter_addr, DataLayout::counter_increment); 1815 __ jmp(*stub->entry()); 1816 } 1817 1818 __ bind(done); 1819 } else 1820 if (code == lir_checkcast) { 1821 Register obj = op->object()->as_register(); 1822 Register dst = op->result_opr()->as_register(); 1823 Label success; 1824 emit_typecheck_helper(op, &success, op->stub()->entry(), &success); 1825 __ bind(success); 1826 if (dst != obj) { 1827 __ mov(dst, obj); 1828 } 1829 } else 1830 if (code == lir_instanceof) { 1831 Register obj = op->object()->as_register(); 1832 Register dst = op->result_opr()->as_register(); 1833 Label success, failure, done; 1834 emit_typecheck_helper(op, &success, &failure, &failure); 1835 __ bind(failure); 1836 __ xorptr(dst, dst); 1837 __ jmpb(done); 1838 __ bind(success); 1839 __ movptr(dst, 1); 1840 __ bind(done); 1841 } else { 1842 ShouldNotReachHere(); 1843 } 1844 1845 } 1846 1847 1848 void LIR_Assembler::emit_compare_and_swap(LIR_OpCompareAndSwap* op) { 1849 if (LP64_ONLY(false &&) op->code() == lir_cas_long && VM_Version::supports_cx8()) { 1850 assert(op->cmp_value()->as_register_lo() == rax, "wrong register"); 1851 assert(op->cmp_value()->as_register_hi() == rdx, "wrong register"); 1852 assert(op->new_value()->as_register_lo() == rbx, "wrong register"); 1853 assert(op->new_value()->as_register_hi() == rcx, "wrong register"); 1854 Register addr = op->addr()->as_register(); 1855 if (os::is_MP()) { 1856 __ lock(); 1857 } 1858 NOT_LP64(__ cmpxchg8(Address(addr, 0))); 1859 1860 } else if (op->code() == lir_cas_int || op->code() == lir_cas_obj ) { 1861 NOT_LP64(assert(op->addr()->is_single_cpu(), "must be single");) 1862 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo()); 1863 Register newval = op->new_value()->as_register(); 1864 Register cmpval = op->cmp_value()->as_register(); 1865 assert(cmpval == rax, "wrong register"); 1866 assert(newval != NULL, "new val must be register"); 1867 assert(cmpval != newval, "cmp and new values must be in different registers"); 1868 assert(cmpval != addr, "cmp and addr must be in different registers"); 1869 assert(newval != addr, "new value and addr must be in different registers"); 1870 1871 if ( op->code() == lir_cas_obj) { 1872 #ifdef _LP64 1873 if (UseCompressedOops) { 1874 __ encode_heap_oop(cmpval); 1875 __ mov(rscratch1, newval); 1876 __ encode_heap_oop(rscratch1); 1877 if (os::is_MP()) { 1878 __ lock(); 1879 } 1880 // cmpval (rax) is implicitly used by this instruction 1881 __ cmpxchgl(rscratch1, Address(addr, 0)); 1882 } else 1883 #endif 1884 { 1885 if (os::is_MP()) { 1886 __ lock(); 1887 } 1888 __ cmpxchgptr(newval, Address(addr, 0)); 1889 } 1890 } else { 1891 assert(op->code() == lir_cas_int, "lir_cas_int expected"); 1892 if (os::is_MP()) { 1893 __ lock(); 1894 } 1895 __ cmpxchgl(newval, Address(addr, 0)); 1896 } 1897 #ifdef _LP64 1898 } else if (op->code() == lir_cas_long) { 1899 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo()); 1900 Register newval = op->new_value()->as_register_lo(); 1901 Register cmpval = op->cmp_value()->as_register_lo(); 1902 assert(cmpval == rax, "wrong register"); 1903 assert(newval != NULL, "new val must be register"); 1904 assert(cmpval != newval, "cmp and new values must be in different registers"); 1905 assert(cmpval != addr, "cmp and addr must be in different registers"); 1906 assert(newval != addr, "new value and addr must be in different registers"); 1907 if (os::is_MP()) { 1908 __ lock(); 1909 } 1910 __ cmpxchgq(newval, Address(addr, 0)); 1911 #endif // _LP64 1912 } else { 1913 Unimplemented(); 1914 } 1915 } 1916 1917 void LIR_Assembler::cmove(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result, BasicType type) { 1918 Assembler::Condition acond, ncond; 1919 switch (condition) { 1920 case lir_cond_equal: acond = Assembler::equal; ncond = Assembler::notEqual; break; 1921 case lir_cond_notEqual: acond = Assembler::notEqual; ncond = Assembler::equal; break; 1922 case lir_cond_less: acond = Assembler::less; ncond = Assembler::greaterEqual; break; 1923 case lir_cond_lessEqual: acond = Assembler::lessEqual; ncond = Assembler::greater; break; 1924 case lir_cond_greaterEqual: acond = Assembler::greaterEqual; ncond = Assembler::less; break; 1925 case lir_cond_greater: acond = Assembler::greater; ncond = Assembler::lessEqual; break; 1926 case lir_cond_belowEqual: acond = Assembler::belowEqual; ncond = Assembler::above; break; 1927 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; ncond = Assembler::below; break; 1928 default: acond = Assembler::equal; ncond = Assembler::notEqual; 1929 ShouldNotReachHere(); 1930 } 1931 1932 if (opr1->is_cpu_register()) { 1933 reg2reg(opr1, result); 1934 } else if (opr1->is_stack()) { 1935 stack2reg(opr1, result, result->type()); 1936 } else if (opr1->is_constant()) { 1937 const2reg(opr1, result, lir_patch_none, NULL); 1938 } else { 1939 ShouldNotReachHere(); 1940 } 1941 1942 if (VM_Version::supports_cmov() && !opr2->is_constant()) { 1943 // optimized version that does not require a branch 1944 if (opr2->is_single_cpu()) { 1945 assert(opr2->cpu_regnr() != result->cpu_regnr(), "opr2 already overwritten by previous move"); 1946 __ cmov(ncond, result->as_register(), opr2->as_register()); 1947 } else if (opr2->is_double_cpu()) { 1948 assert(opr2->cpu_regnrLo() != result->cpu_regnrLo() && opr2->cpu_regnrLo() != result->cpu_regnrHi(), "opr2 already overwritten by previous move"); 1949 assert(opr2->cpu_regnrHi() != result->cpu_regnrLo() && opr2->cpu_regnrHi() != result->cpu_regnrHi(), "opr2 already overwritten by previous move"); 1950 __ cmovptr(ncond, result->as_register_lo(), opr2->as_register_lo()); 1951 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), opr2->as_register_hi());) 1952 } else if (opr2->is_single_stack()) { 1953 __ cmovl(ncond, result->as_register(), frame_map()->address_for_slot(opr2->single_stack_ix())); 1954 } else if (opr2->is_double_stack()) { 1955 __ cmovptr(ncond, result->as_register_lo(), frame_map()->address_for_slot(opr2->double_stack_ix(), lo_word_offset_in_bytes)); 1956 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), frame_map()->address_for_slot(opr2->double_stack_ix(), hi_word_offset_in_bytes));) 1957 } else { 1958 ShouldNotReachHere(); 1959 } 1960 1961 } else { 1962 Label skip; 1963 __ jcc (acond, skip); 1964 if (opr2->is_cpu_register()) { 1965 reg2reg(opr2, result); 1966 } else if (opr2->is_stack()) { 1967 stack2reg(opr2, result, result->type()); 1968 } else if (opr2->is_constant()) { 1969 const2reg(opr2, result, lir_patch_none, NULL); 1970 } else { 1971 ShouldNotReachHere(); 1972 } 1973 __ bind(skip); 1974 } 1975 } 1976 1977 1978 void LIR_Assembler::arith_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dest, CodeEmitInfo* info, bool pop_fpu_stack) { 1979 assert(info == NULL, "should never be used, idiv/irem and ldiv/lrem not handled by this method"); 1980 1981 if (left->is_single_cpu()) { 1982 assert(left == dest, "left and dest must be equal"); 1983 Register lreg = left->as_register(); 1984 1985 if (right->is_single_cpu()) { 1986 // cpu register - cpu register 1987 Register rreg = right->as_register(); 1988 switch (code) { 1989 case lir_add: __ addl (lreg, rreg); break; 1990 case lir_sub: __ subl (lreg, rreg); break; 1991 case lir_mul: __ imull(lreg, rreg); break; 1992 default: ShouldNotReachHere(); 1993 } 1994 1995 } else if (right->is_stack()) { 1996 // cpu register - stack 1997 Address raddr = frame_map()->address_for_slot(right->single_stack_ix()); 1998 switch (code) { 1999 case lir_add: __ addl(lreg, raddr); break; 2000 case lir_sub: __ subl(lreg, raddr); break; 2001 default: ShouldNotReachHere(); 2002 } 2003 2004 } else if (right->is_constant()) { 2005 // cpu register - constant 2006 jint c = right->as_constant_ptr()->as_jint(); 2007 switch (code) { 2008 case lir_add: { 2009 __ incrementl(lreg, c); 2010 break; 2011 } 2012 case lir_sub: { 2013 __ decrementl(lreg, c); 2014 break; 2015 } 2016 default: ShouldNotReachHere(); 2017 } 2018 2019 } else { 2020 ShouldNotReachHere(); 2021 } 2022 2023 } else if (left->is_double_cpu()) { 2024 assert(left == dest, "left and dest must be equal"); 2025 Register lreg_lo = left->as_register_lo(); 2026 Register lreg_hi = left->as_register_hi(); 2027 2028 if (right->is_double_cpu()) { 2029 // cpu register - cpu register 2030 Register rreg_lo = right->as_register_lo(); 2031 Register rreg_hi = right->as_register_hi(); 2032 NOT_LP64(assert_different_registers(lreg_lo, lreg_hi, rreg_lo, rreg_hi)); 2033 LP64_ONLY(assert_different_registers(lreg_lo, rreg_lo)); 2034 switch (code) { 2035 case lir_add: 2036 __ addptr(lreg_lo, rreg_lo); 2037 NOT_LP64(__ adcl(lreg_hi, rreg_hi)); 2038 break; 2039 case lir_sub: 2040 __ subptr(lreg_lo, rreg_lo); 2041 NOT_LP64(__ sbbl(lreg_hi, rreg_hi)); 2042 break; 2043 case lir_mul: 2044 #ifdef _LP64 2045 __ imulq(lreg_lo, rreg_lo); 2046 #else 2047 assert(lreg_lo == rax && lreg_hi == rdx, "must be"); 2048 __ imull(lreg_hi, rreg_lo); 2049 __ imull(rreg_hi, lreg_lo); 2050 __ addl (rreg_hi, lreg_hi); 2051 __ mull (rreg_lo); 2052 __ addl (lreg_hi, rreg_hi); 2053 #endif // _LP64 2054 break; 2055 default: 2056 ShouldNotReachHere(); 2057 } 2058 2059 } else if (right->is_constant()) { 2060 // cpu register - constant 2061 #ifdef _LP64 2062 jlong c = right->as_constant_ptr()->as_jlong_bits(); 2063 __ movptr(r10, (intptr_t) c); 2064 switch (code) { 2065 case lir_add: 2066 __ addptr(lreg_lo, r10); 2067 break; 2068 case lir_sub: 2069 __ subptr(lreg_lo, r10); 2070 break; 2071 default: 2072 ShouldNotReachHere(); 2073 } 2074 #else 2075 jint c_lo = right->as_constant_ptr()->as_jint_lo(); 2076 jint c_hi = right->as_constant_ptr()->as_jint_hi(); 2077 switch (code) { 2078 case lir_add: 2079 __ addptr(lreg_lo, c_lo); 2080 __ adcl(lreg_hi, c_hi); 2081 break; 2082 case lir_sub: 2083 __ subptr(lreg_lo, c_lo); 2084 __ sbbl(lreg_hi, c_hi); 2085 break; 2086 default: 2087 ShouldNotReachHere(); 2088 } 2089 #endif // _LP64 2090 2091 } else { 2092 ShouldNotReachHere(); 2093 } 2094 2095 } else if (left->is_single_xmm()) { 2096 assert(left == dest, "left and dest must be equal"); 2097 XMMRegister lreg = left->as_xmm_float_reg(); 2098 2099 if (right->is_single_xmm()) { 2100 XMMRegister rreg = right->as_xmm_float_reg(); 2101 switch (code) { 2102 case lir_add: __ addss(lreg, rreg); break; 2103 case lir_sub: __ subss(lreg, rreg); break; 2104 case lir_mul_strictfp: // fall through 2105 case lir_mul: __ mulss(lreg, rreg); break; 2106 case lir_div_strictfp: // fall through 2107 case lir_div: __ divss(lreg, rreg); break; 2108 default: ShouldNotReachHere(); 2109 } 2110 } else { 2111 Address raddr; 2112 if (right->is_single_stack()) { 2113 raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2114 } else if (right->is_constant()) { 2115 // hack for now 2116 raddr = __ as_Address(InternalAddress(float_constant(right->as_jfloat()))); 2117 } else { 2118 ShouldNotReachHere(); 2119 } 2120 switch (code) { 2121 case lir_add: __ addss(lreg, raddr); break; 2122 case lir_sub: __ subss(lreg, raddr); break; 2123 case lir_mul_strictfp: // fall through 2124 case lir_mul: __ mulss(lreg, raddr); break; 2125 case lir_div_strictfp: // fall through 2126 case lir_div: __ divss(lreg, raddr); break; 2127 default: ShouldNotReachHere(); 2128 } 2129 } 2130 2131 } else if (left->is_double_xmm()) { 2132 assert(left == dest, "left and dest must be equal"); 2133 2134 XMMRegister lreg = left->as_xmm_double_reg(); 2135 if (right->is_double_xmm()) { 2136 XMMRegister rreg = right->as_xmm_double_reg(); 2137 switch (code) { 2138 case lir_add: __ addsd(lreg, rreg); break; 2139 case lir_sub: __ subsd(lreg, rreg); break; 2140 case lir_mul_strictfp: // fall through 2141 case lir_mul: __ mulsd(lreg, rreg); break; 2142 case lir_div_strictfp: // fall through 2143 case lir_div: __ divsd(lreg, rreg); break; 2144 default: ShouldNotReachHere(); 2145 } 2146 } else { 2147 Address raddr; 2148 if (right->is_double_stack()) { 2149 raddr = frame_map()->address_for_slot(right->double_stack_ix()); 2150 } else if (right->is_constant()) { 2151 // hack for now 2152 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble()))); 2153 } else { 2154 ShouldNotReachHere(); 2155 } 2156 switch (code) { 2157 case lir_add: __ addsd(lreg, raddr); break; 2158 case lir_sub: __ subsd(lreg, raddr); break; 2159 case lir_mul_strictfp: // fall through 2160 case lir_mul: __ mulsd(lreg, raddr); break; 2161 case lir_div_strictfp: // fall through 2162 case lir_div: __ divsd(lreg, raddr); break; 2163 default: ShouldNotReachHere(); 2164 } 2165 } 2166 2167 } else if (left->is_single_fpu()) { 2168 assert(dest->is_single_fpu(), "fpu stack allocation required"); 2169 2170 if (right->is_single_fpu()) { 2171 arith_fpu_implementation(code, left->fpu_regnr(), right->fpu_regnr(), dest->fpu_regnr(), pop_fpu_stack); 2172 2173 } else { 2174 assert(left->fpu_regnr() == 0, "left must be on TOS"); 2175 assert(dest->fpu_regnr() == 0, "dest must be on TOS"); 2176 2177 Address raddr; 2178 if (right->is_single_stack()) { 2179 raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2180 } else if (right->is_constant()) { 2181 address const_addr = float_constant(right->as_jfloat()); 2182 assert(const_addr != NULL, "incorrect float/double constant maintainance"); 2183 // hack for now 2184 raddr = __ as_Address(InternalAddress(const_addr)); 2185 } else { 2186 ShouldNotReachHere(); 2187 } 2188 2189 switch (code) { 2190 case lir_add: __ fadd_s(raddr); break; 2191 case lir_sub: __ fsub_s(raddr); break; 2192 case lir_mul_strictfp: // fall through 2193 case lir_mul: __ fmul_s(raddr); break; 2194 case lir_div_strictfp: // fall through 2195 case lir_div: __ fdiv_s(raddr); break; 2196 default: ShouldNotReachHere(); 2197 } 2198 } 2199 2200 } else if (left->is_double_fpu()) { 2201 assert(dest->is_double_fpu(), "fpu stack allocation required"); 2202 2203 if (code == lir_mul_strictfp || code == lir_div_strictfp) { 2204 // Double values require special handling for strictfp mul/div on x86 2205 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1())); 2206 __ fmulp(left->fpu_regnrLo() + 1); 2207 } 2208 2209 if (right->is_double_fpu()) { 2210 arith_fpu_implementation(code, left->fpu_regnrLo(), right->fpu_regnrLo(), dest->fpu_regnrLo(), pop_fpu_stack); 2211 2212 } else { 2213 assert(left->fpu_regnrLo() == 0, "left must be on TOS"); 2214 assert(dest->fpu_regnrLo() == 0, "dest must be on TOS"); 2215 2216 Address raddr; 2217 if (right->is_double_stack()) { 2218 raddr = frame_map()->address_for_slot(right->double_stack_ix()); 2219 } else if (right->is_constant()) { 2220 // hack for now 2221 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble()))); 2222 } else { 2223 ShouldNotReachHere(); 2224 } 2225 2226 switch (code) { 2227 case lir_add: __ fadd_d(raddr); break; 2228 case lir_sub: __ fsub_d(raddr); break; 2229 case lir_mul_strictfp: // fall through 2230 case lir_mul: __ fmul_d(raddr); break; 2231 case lir_div_strictfp: // fall through 2232 case lir_div: __ fdiv_d(raddr); break; 2233 default: ShouldNotReachHere(); 2234 } 2235 } 2236 2237 if (code == lir_mul_strictfp || code == lir_div_strictfp) { 2238 // Double values require special handling for strictfp mul/div on x86 2239 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2())); 2240 __ fmulp(dest->fpu_regnrLo() + 1); 2241 } 2242 2243 } else if (left->is_single_stack() || left->is_address()) { 2244 assert(left == dest, "left and dest must be equal"); 2245 2246 Address laddr; 2247 if (left->is_single_stack()) { 2248 laddr = frame_map()->address_for_slot(left->single_stack_ix()); 2249 } else if (left->is_address()) { 2250 laddr = as_Address(left->as_address_ptr()); 2251 } else { 2252 ShouldNotReachHere(); 2253 } 2254 2255 if (right->is_single_cpu()) { 2256 Register rreg = right->as_register(); 2257 switch (code) { 2258 case lir_add: __ addl(laddr, rreg); break; 2259 case lir_sub: __ subl(laddr, rreg); break; 2260 default: ShouldNotReachHere(); 2261 } 2262 } else if (right->is_constant()) { 2263 jint c = right->as_constant_ptr()->as_jint(); 2264 switch (code) { 2265 case lir_add: { 2266 __ incrementl(laddr, c); 2267 break; 2268 } 2269 case lir_sub: { 2270 __ decrementl(laddr, c); 2271 break; 2272 } 2273 default: ShouldNotReachHere(); 2274 } 2275 } else { 2276 ShouldNotReachHere(); 2277 } 2278 2279 } else { 2280 ShouldNotReachHere(); 2281 } 2282 } 2283 2284 void LIR_Assembler::arith_fpu_implementation(LIR_Code code, int left_index, int right_index, int dest_index, bool pop_fpu_stack) { 2285 assert(pop_fpu_stack || (left_index == dest_index || right_index == dest_index), "invalid LIR"); 2286 assert(!pop_fpu_stack || (left_index - 1 == dest_index || right_index - 1 == dest_index), "invalid LIR"); 2287 assert(left_index == 0 || right_index == 0, "either must be on top of stack"); 2288 2289 bool left_is_tos = (left_index == 0); 2290 bool dest_is_tos = (dest_index == 0); 2291 int non_tos_index = (left_is_tos ? right_index : left_index); 2292 2293 switch (code) { 2294 case lir_add: 2295 if (pop_fpu_stack) __ faddp(non_tos_index); 2296 else if (dest_is_tos) __ fadd (non_tos_index); 2297 else __ fadda(non_tos_index); 2298 break; 2299 2300 case lir_sub: 2301 if (left_is_tos) { 2302 if (pop_fpu_stack) __ fsubrp(non_tos_index); 2303 else if (dest_is_tos) __ fsub (non_tos_index); 2304 else __ fsubra(non_tos_index); 2305 } else { 2306 if (pop_fpu_stack) __ fsubp (non_tos_index); 2307 else if (dest_is_tos) __ fsubr (non_tos_index); 2308 else __ fsuba (non_tos_index); 2309 } 2310 break; 2311 2312 case lir_mul_strictfp: // fall through 2313 case lir_mul: 2314 if (pop_fpu_stack) __ fmulp(non_tos_index); 2315 else if (dest_is_tos) __ fmul (non_tos_index); 2316 else __ fmula(non_tos_index); 2317 break; 2318 2319 case lir_div_strictfp: // fall through 2320 case lir_div: 2321 if (left_is_tos) { 2322 if (pop_fpu_stack) __ fdivrp(non_tos_index); 2323 else if (dest_is_tos) __ fdiv (non_tos_index); 2324 else __ fdivra(non_tos_index); 2325 } else { 2326 if (pop_fpu_stack) __ fdivp (non_tos_index); 2327 else if (dest_is_tos) __ fdivr (non_tos_index); 2328 else __ fdiva (non_tos_index); 2329 } 2330 break; 2331 2332 case lir_rem: 2333 assert(left_is_tos && dest_is_tos && right_index == 1, "must be guaranteed by FPU stack allocation"); 2334 __ fremr(noreg); 2335 break; 2336 2337 default: 2338 ShouldNotReachHere(); 2339 } 2340 } 2341 2342 2343 void LIR_Assembler::intrinsic_op(LIR_Code code, LIR_Opr value, LIR_Opr unused, LIR_Opr dest, LIR_Op* op) { 2344 if (value->is_double_xmm()) { 2345 switch(code) { 2346 case lir_abs : 2347 { 2348 if (dest->as_xmm_double_reg() != value->as_xmm_double_reg()) { 2349 __ movdbl(dest->as_xmm_double_reg(), value->as_xmm_double_reg()); 2350 } 2351 __ andpd(dest->as_xmm_double_reg(), 2352 ExternalAddress((address)double_signmask_pool)); 2353 } 2354 break; 2355 2356 case lir_sqrt: __ sqrtsd(dest->as_xmm_double_reg(), value->as_xmm_double_reg()); break; 2357 // all other intrinsics are not available in the SSE instruction set, so FPU is used 2358 default : ShouldNotReachHere(); 2359 } 2360 2361 } else if (value->is_double_fpu()) { 2362 assert(value->fpu_regnrLo() == 0 && dest->fpu_regnrLo() == 0, "both must be on TOS"); 2363 switch(code) { 2364 case lir_log10 : __ flog10() ; break; 2365 case lir_abs : __ fabs() ; break; 2366 case lir_sqrt : __ fsqrt(); break; 2367 case lir_tan : 2368 // Should consider not saving rbx, if not necessary 2369 __ trigfunc('t', op->as_Op2()->fpu_stack_size()); 2370 break; 2371 case lir_pow : 2372 __ pow_with_fallback(op->as_Op2()->fpu_stack_size()); 2373 break; 2374 default : ShouldNotReachHere(); 2375 } 2376 } else { 2377 Unimplemented(); 2378 } 2379 } 2380 2381 void LIR_Assembler::logic_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst) { 2382 // assert(left->destroys_register(), "check"); 2383 if (left->is_single_cpu()) { 2384 Register reg = left->as_register(); 2385 if (right->is_constant()) { 2386 int val = right->as_constant_ptr()->as_jint(); 2387 switch (code) { 2388 case lir_logic_and: __ andl (reg, val); break; 2389 case lir_logic_or: __ orl (reg, val); break; 2390 case lir_logic_xor: __ xorl (reg, val); break; 2391 default: ShouldNotReachHere(); 2392 } 2393 } else if (right->is_stack()) { 2394 // added support for stack operands 2395 Address raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2396 switch (code) { 2397 case lir_logic_and: __ andl (reg, raddr); break; 2398 case lir_logic_or: __ orl (reg, raddr); break; 2399 case lir_logic_xor: __ xorl (reg, raddr); break; 2400 default: ShouldNotReachHere(); 2401 } 2402 } else { 2403 Register rright = right->as_register(); 2404 switch (code) { 2405 case lir_logic_and: __ andptr (reg, rright); break; 2406 case lir_logic_or : __ orptr (reg, rright); break; 2407 case lir_logic_xor: __ xorptr (reg, rright); break; 2408 default: ShouldNotReachHere(); 2409 } 2410 } 2411 move_regs(reg, dst->as_register()); 2412 } else { 2413 Register l_lo = left->as_register_lo(); 2414 Register l_hi = left->as_register_hi(); 2415 if (right->is_constant()) { 2416 #ifdef _LP64 2417 __ mov64(rscratch1, right->as_constant_ptr()->as_jlong()); 2418 switch (code) { 2419 case lir_logic_and: 2420 __ andq(l_lo, rscratch1); 2421 break; 2422 case lir_logic_or: 2423 __ orq(l_lo, rscratch1); 2424 break; 2425 case lir_logic_xor: 2426 __ xorq(l_lo, rscratch1); 2427 break; 2428 default: ShouldNotReachHere(); 2429 } 2430 #else 2431 int r_lo = right->as_constant_ptr()->as_jint_lo(); 2432 int r_hi = right->as_constant_ptr()->as_jint_hi(); 2433 switch (code) { 2434 case lir_logic_and: 2435 __ andl(l_lo, r_lo); 2436 __ andl(l_hi, r_hi); 2437 break; 2438 case lir_logic_or: 2439 __ orl(l_lo, r_lo); 2440 __ orl(l_hi, r_hi); 2441 break; 2442 case lir_logic_xor: 2443 __ xorl(l_lo, r_lo); 2444 __ xorl(l_hi, r_hi); 2445 break; 2446 default: ShouldNotReachHere(); 2447 } 2448 #endif // _LP64 2449 } else { 2450 #ifdef _LP64 2451 Register r_lo; 2452 if (right->type() == T_OBJECT || right->type() == T_ARRAY) { 2453 r_lo = right->as_register(); 2454 } else { 2455 r_lo = right->as_register_lo(); 2456 } 2457 #else 2458 Register r_lo = right->as_register_lo(); 2459 Register r_hi = right->as_register_hi(); 2460 assert(l_lo != r_hi, "overwriting registers"); 2461 #endif 2462 switch (code) { 2463 case lir_logic_and: 2464 __ andptr(l_lo, r_lo); 2465 NOT_LP64(__ andptr(l_hi, r_hi);) 2466 break; 2467 case lir_logic_or: 2468 __ orptr(l_lo, r_lo); 2469 NOT_LP64(__ orptr(l_hi, r_hi);) 2470 break; 2471 case lir_logic_xor: 2472 __ xorptr(l_lo, r_lo); 2473 NOT_LP64(__ xorptr(l_hi, r_hi);) 2474 break; 2475 default: ShouldNotReachHere(); 2476 } 2477 } 2478 2479 Register dst_lo = dst->as_register_lo(); 2480 Register dst_hi = dst->as_register_hi(); 2481 2482 #ifdef _LP64 2483 move_regs(l_lo, dst_lo); 2484 #else 2485 if (dst_lo == l_hi) { 2486 assert(dst_hi != l_lo, "overwriting registers"); 2487 move_regs(l_hi, dst_hi); 2488 move_regs(l_lo, dst_lo); 2489 } else { 2490 assert(dst_lo != l_hi, "overwriting registers"); 2491 move_regs(l_lo, dst_lo); 2492 move_regs(l_hi, dst_hi); 2493 } 2494 #endif // _LP64 2495 } 2496 } 2497 2498 2499 // we assume that rax, and rdx can be overwritten 2500 void LIR_Assembler::arithmetic_idiv(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr temp, LIR_Opr result, CodeEmitInfo* info) { 2501 2502 assert(left->is_single_cpu(), "left must be register"); 2503 assert(right->is_single_cpu() || right->is_constant(), "right must be register or constant"); 2504 assert(result->is_single_cpu(), "result must be register"); 2505 2506 // assert(left->destroys_register(), "check"); 2507 // assert(right->destroys_register(), "check"); 2508 2509 Register lreg = left->as_register(); 2510 Register dreg = result->as_register(); 2511 2512 if (right->is_constant()) { 2513 int divisor = right->as_constant_ptr()->as_jint(); 2514 assert(divisor > 0 && is_power_of_2(divisor), "must be"); 2515 if (code == lir_idiv) { 2516 assert(lreg == rax, "must be rax,"); 2517 assert(temp->as_register() == rdx, "tmp register must be rdx"); 2518 __ cdql(); // sign extend into rdx:rax 2519 if (divisor == 2) { 2520 __ subl(lreg, rdx); 2521 } else { 2522 __ andl(rdx, divisor - 1); 2523 __ addl(lreg, rdx); 2524 } 2525 __ sarl(lreg, log2_intptr(divisor)); 2526 move_regs(lreg, dreg); 2527 } else if (code == lir_irem) { 2528 Label done; 2529 __ mov(dreg, lreg); 2530 __ andl(dreg, 0x80000000 | (divisor - 1)); 2531 __ jcc(Assembler::positive, done); 2532 __ decrement(dreg); 2533 __ orl(dreg, ~(divisor - 1)); 2534 __ increment(dreg); 2535 __ bind(done); 2536 } else { 2537 ShouldNotReachHere(); 2538 } 2539 } else { 2540 Register rreg = right->as_register(); 2541 assert(lreg == rax, "left register must be rax,"); 2542 assert(rreg != rdx, "right register must not be rdx"); 2543 assert(temp->as_register() == rdx, "tmp register must be rdx"); 2544 2545 move_regs(lreg, rax); 2546 2547 int idivl_offset = __ corrected_idivl(rreg); 2548 add_debug_info_for_div0(idivl_offset, info); 2549 if (code == lir_irem) { 2550 move_regs(rdx, dreg); // result is in rdx 2551 } else { 2552 move_regs(rax, dreg); 2553 } 2554 } 2555 } 2556 2557 2558 void LIR_Assembler::comp_op(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Op2* op) { 2559 if (opr1->is_single_cpu()) { 2560 Register reg1 = opr1->as_register(); 2561 if (opr2->is_single_cpu()) { 2562 // cpu register - cpu register 2563 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) { 2564 __ cmpptr(reg1, opr2->as_register()); 2565 } else { 2566 assert(opr2->type() != T_OBJECT && opr2->type() != T_ARRAY, "cmp int, oop?"); 2567 __ cmpl(reg1, opr2->as_register()); 2568 } 2569 } else if (opr2->is_stack()) { 2570 // cpu register - stack 2571 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) { 2572 __ cmpptr(reg1, frame_map()->address_for_slot(opr2->single_stack_ix())); 2573 } else { 2574 __ cmpl(reg1, frame_map()->address_for_slot(opr2->single_stack_ix())); 2575 } 2576 } else if (opr2->is_constant()) { 2577 // cpu register - constant 2578 LIR_Const* c = opr2->as_constant_ptr(); 2579 if (c->type() == T_INT) { 2580 __ cmpl(reg1, c->as_jint()); 2581 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) { 2582 // In 64bit oops are single register 2583 jobject o = c->as_jobject(); 2584 if (o == NULL) { 2585 __ cmpptr(reg1, (int32_t)NULL_WORD); 2586 } else { 2587 #ifdef _LP64 2588 __ movoop(rscratch1, o); 2589 __ cmpptr(reg1, rscratch1); 2590 #else 2591 __ cmpoop(reg1, c->as_jobject()); 2592 #endif // _LP64 2593 } 2594 } else { 2595 fatal("unexpected type: %s", basictype_to_str(c->type())); 2596 } 2597 // cpu register - address 2598 } else if (opr2->is_address()) { 2599 if (op->info() != NULL) { 2600 add_debug_info_for_null_check_here(op->info()); 2601 } 2602 __ cmpl(reg1, as_Address(opr2->as_address_ptr())); 2603 } else { 2604 ShouldNotReachHere(); 2605 } 2606 2607 } else if(opr1->is_double_cpu()) { 2608 Register xlo = opr1->as_register_lo(); 2609 Register xhi = opr1->as_register_hi(); 2610 if (opr2->is_double_cpu()) { 2611 #ifdef _LP64 2612 __ cmpptr(xlo, opr2->as_register_lo()); 2613 #else 2614 // cpu register - cpu register 2615 Register ylo = opr2->as_register_lo(); 2616 Register yhi = opr2->as_register_hi(); 2617 __ subl(xlo, ylo); 2618 __ sbbl(xhi, yhi); 2619 if (condition == lir_cond_equal || condition == lir_cond_notEqual) { 2620 __ orl(xhi, xlo); 2621 } 2622 #endif // _LP64 2623 } else if (opr2->is_constant()) { 2624 // cpu register - constant 0 2625 assert(opr2->as_jlong() == (jlong)0, "only handles zero"); 2626 #ifdef _LP64 2627 __ cmpptr(xlo, (int32_t)opr2->as_jlong()); 2628 #else 2629 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "only handles equals case"); 2630 __ orl(xhi, xlo); 2631 #endif // _LP64 2632 } else { 2633 ShouldNotReachHere(); 2634 } 2635 2636 } else if (opr1->is_single_xmm()) { 2637 XMMRegister reg1 = opr1->as_xmm_float_reg(); 2638 if (opr2->is_single_xmm()) { 2639 // xmm register - xmm register 2640 __ ucomiss(reg1, opr2->as_xmm_float_reg()); 2641 } else if (opr2->is_stack()) { 2642 // xmm register - stack 2643 __ ucomiss(reg1, frame_map()->address_for_slot(opr2->single_stack_ix())); 2644 } else if (opr2->is_constant()) { 2645 // xmm register - constant 2646 __ ucomiss(reg1, InternalAddress(float_constant(opr2->as_jfloat()))); 2647 } else if (opr2->is_address()) { 2648 // xmm register - address 2649 if (op->info() != NULL) { 2650 add_debug_info_for_null_check_here(op->info()); 2651 } 2652 __ ucomiss(reg1, as_Address(opr2->as_address_ptr())); 2653 } else { 2654 ShouldNotReachHere(); 2655 } 2656 2657 } else if (opr1->is_double_xmm()) { 2658 XMMRegister reg1 = opr1->as_xmm_double_reg(); 2659 if (opr2->is_double_xmm()) { 2660 // xmm register - xmm register 2661 __ ucomisd(reg1, opr2->as_xmm_double_reg()); 2662 } else if (opr2->is_stack()) { 2663 // xmm register - stack 2664 __ ucomisd(reg1, frame_map()->address_for_slot(opr2->double_stack_ix())); 2665 } else if (opr2->is_constant()) { 2666 // xmm register - constant 2667 __ ucomisd(reg1, InternalAddress(double_constant(opr2->as_jdouble()))); 2668 } else if (opr2->is_address()) { 2669 // xmm register - address 2670 if (op->info() != NULL) { 2671 add_debug_info_for_null_check_here(op->info()); 2672 } 2673 __ ucomisd(reg1, as_Address(opr2->pointer()->as_address())); 2674 } else { 2675 ShouldNotReachHere(); 2676 } 2677 2678 } else if(opr1->is_single_fpu() || opr1->is_double_fpu()) { 2679 assert(opr1->is_fpu_register() && opr1->fpu() == 0, "currently left-hand side must be on TOS (relax this restriction)"); 2680 assert(opr2->is_fpu_register(), "both must be registers"); 2681 __ fcmp(noreg, opr2->fpu(), op->fpu_pop_count() > 0, op->fpu_pop_count() > 1); 2682 2683 } else if (opr1->is_address() && opr2->is_constant()) { 2684 LIR_Const* c = opr2->as_constant_ptr(); 2685 #ifdef _LP64 2686 if (c->type() == T_OBJECT || c->type() == T_ARRAY) { 2687 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "need to reverse"); 2688 __ movoop(rscratch1, c->as_jobject()); 2689 } 2690 #endif // LP64 2691 if (op->info() != NULL) { 2692 add_debug_info_for_null_check_here(op->info()); 2693 } 2694 // special case: address - constant 2695 LIR_Address* addr = opr1->as_address_ptr(); 2696 if (c->type() == T_INT) { 2697 __ cmpl(as_Address(addr), c->as_jint()); 2698 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) { 2699 #ifdef _LP64 2700 // %%% Make this explode if addr isn't reachable until we figure out a 2701 // better strategy by giving noreg as the temp for as_Address 2702 __ cmpptr(rscratch1, as_Address(addr, noreg)); 2703 #else 2704 __ cmpoop(as_Address(addr), c->as_jobject()); 2705 #endif // _LP64 2706 } else { 2707 ShouldNotReachHere(); 2708 } 2709 2710 } else { 2711 ShouldNotReachHere(); 2712 } 2713 } 2714 2715 void LIR_Assembler::comp_fl2i(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst, LIR_Op2* op) { 2716 if (code == lir_cmp_fd2i || code == lir_ucmp_fd2i) { 2717 if (left->is_single_xmm()) { 2718 assert(right->is_single_xmm(), "must match"); 2719 __ cmpss2int(left->as_xmm_float_reg(), right->as_xmm_float_reg(), dst->as_register(), code == lir_ucmp_fd2i); 2720 } else if (left->is_double_xmm()) { 2721 assert(right->is_double_xmm(), "must match"); 2722 __ cmpsd2int(left->as_xmm_double_reg(), right->as_xmm_double_reg(), dst->as_register(), code == lir_ucmp_fd2i); 2723 2724 } else { 2725 assert(left->is_single_fpu() || left->is_double_fpu(), "must be"); 2726 assert(right->is_single_fpu() || right->is_double_fpu(), "must match"); 2727 2728 assert(left->fpu() == 0, "left must be on TOS"); 2729 __ fcmp2int(dst->as_register(), code == lir_ucmp_fd2i, right->fpu(), 2730 op->fpu_pop_count() > 0, op->fpu_pop_count() > 1); 2731 } 2732 } else { 2733 assert(code == lir_cmp_l2i, "check"); 2734 #ifdef _LP64 2735 Label done; 2736 Register dest = dst->as_register(); 2737 __ cmpptr(left->as_register_lo(), right->as_register_lo()); 2738 __ movl(dest, -1); 2739 __ jccb(Assembler::less, done); 2740 __ set_byte_if_not_zero(dest); 2741 __ movzbl(dest, dest); 2742 __ bind(done); 2743 #else 2744 __ lcmp2int(left->as_register_hi(), 2745 left->as_register_lo(), 2746 right->as_register_hi(), 2747 right->as_register_lo()); 2748 move_regs(left->as_register_hi(), dst->as_register()); 2749 #endif // _LP64 2750 } 2751 } 2752 2753 2754 void LIR_Assembler::align_call(LIR_Code code) { 2755 if (os::is_MP()) { 2756 // make sure that the displacement word of the call ends up word aligned 2757 int offset = __ offset(); 2758 switch (code) { 2759 case lir_static_call: 2760 case lir_optvirtual_call: 2761 case lir_dynamic_call: 2762 offset += NativeCall::displacement_offset; 2763 break; 2764 case lir_icvirtual_call: 2765 offset += NativeCall::displacement_offset + NativeMovConstReg::instruction_size; 2766 break; 2767 case lir_virtual_call: // currently, sparc-specific for niagara 2768 default: ShouldNotReachHere(); 2769 } 2770 __ align(BytesPerWord, offset); 2771 } 2772 } 2773 2774 2775 void LIR_Assembler::call(LIR_OpJavaCall* op, relocInfo::relocType rtype) { 2776 assert(!os::is_MP() || (__ offset() + NativeCall::displacement_offset) % BytesPerWord == 0, 2777 "must be aligned"); 2778 __ call(AddressLiteral(op->addr(), rtype)); 2779 add_call_info(code_offset(), op->info()); 2780 } 2781 2782 2783 void LIR_Assembler::ic_call(LIR_OpJavaCall* op) { 2784 __ ic_call(op->addr()); 2785 add_call_info(code_offset(), op->info()); 2786 assert(!os::is_MP() || 2787 (__ offset() - NativeCall::instruction_size + NativeCall::displacement_offset) % BytesPerWord == 0, 2788 "must be aligned"); 2789 } 2790 2791 2792 /* Currently, vtable-dispatch is only enabled for sparc platforms */ 2793 void LIR_Assembler::vtable_call(LIR_OpJavaCall* op) { 2794 ShouldNotReachHere(); 2795 } 2796 2797 2798 void LIR_Assembler::emit_static_call_stub() { 2799 address call_pc = __ pc(); 2800 address stub = __ start_a_stub(call_stub_size); 2801 if (stub == NULL) { 2802 bailout("static call stub overflow"); 2803 return; 2804 } 2805 2806 int start = __ offset(); 2807 if (os::is_MP()) { 2808 // make sure that the displacement word of the call ends up word aligned 2809 __ align(BytesPerWord, __ offset() + NativeMovConstReg::instruction_size + NativeCall::displacement_offset); 2810 } 2811 __ relocate(static_stub_Relocation::spec(call_pc)); 2812 __ mov_metadata(rbx, (Metadata*)NULL); 2813 // must be set to -1 at code generation time 2814 assert(!os::is_MP() || ((__ offset() + 1) % BytesPerWord) == 0, "must be aligned on MP"); 2815 // On 64bit this will die since it will take a movq & jmp, must be only a jmp 2816 __ jump(RuntimeAddress(__ pc())); 2817 2818 assert(__ offset() - start <= call_stub_size, "stub too big"); 2819 __ end_a_stub(); 2820 } 2821 2822 2823 void LIR_Assembler::throw_op(LIR_Opr exceptionPC, LIR_Opr exceptionOop, CodeEmitInfo* info) { 2824 assert(exceptionOop->as_register() == rax, "must match"); 2825 assert(exceptionPC->as_register() == rdx, "must match"); 2826 2827 // exception object is not added to oop map by LinearScan 2828 // (LinearScan assumes that no oops are in fixed registers) 2829 info->add_register_oop(exceptionOop); 2830 Runtime1::StubID unwind_id; 2831 2832 // get current pc information 2833 // pc is only needed if the method has an exception handler, the unwind code does not need it. 2834 int pc_for_athrow_offset = __ offset(); 2835 InternalAddress pc_for_athrow(__ pc()); 2836 __ lea(exceptionPC->as_register(), pc_for_athrow); 2837 add_call_info(pc_for_athrow_offset, info); // for exception handler 2838 2839 __ verify_not_null_oop(rax); 2840 // search an exception handler (rax: exception oop, rdx: throwing pc) 2841 if (compilation()->has_fpu_code()) { 2842 unwind_id = Runtime1::handle_exception_id; 2843 } else { 2844 unwind_id = Runtime1::handle_exception_nofpu_id; 2845 } 2846 __ call(RuntimeAddress(Runtime1::entry_for(unwind_id))); 2847 2848 // enough room for two byte trap 2849 __ nop(); 2850 } 2851 2852 2853 void LIR_Assembler::unwind_op(LIR_Opr exceptionOop) { 2854 assert(exceptionOop->as_register() == rax, "must match"); 2855 2856 __ jmp(_unwind_handler_entry); 2857 } 2858 2859 2860 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, LIR_Opr count, LIR_Opr dest, LIR_Opr tmp) { 2861 2862 // optimized version for linear scan: 2863 // * count must be already in ECX (guaranteed by LinearScan) 2864 // * left and dest must be equal 2865 // * tmp must be unused 2866 assert(count->as_register() == SHIFT_count, "count must be in ECX"); 2867 assert(left == dest, "left and dest must be equal"); 2868 assert(tmp->is_illegal(), "wasting a register if tmp is allocated"); 2869 2870 if (left->is_single_cpu()) { 2871 Register value = left->as_register(); 2872 assert(value != SHIFT_count, "left cannot be ECX"); 2873 2874 switch (code) { 2875 case lir_shl: __ shll(value); break; 2876 case lir_shr: __ sarl(value); break; 2877 case lir_ushr: __ shrl(value); break; 2878 default: ShouldNotReachHere(); 2879 } 2880 } else if (left->is_double_cpu()) { 2881 Register lo = left->as_register_lo(); 2882 Register hi = left->as_register_hi(); 2883 assert(lo != SHIFT_count && hi != SHIFT_count, "left cannot be ECX"); 2884 #ifdef _LP64 2885 switch (code) { 2886 case lir_shl: __ shlptr(lo); break; 2887 case lir_shr: __ sarptr(lo); break; 2888 case lir_ushr: __ shrptr(lo); break; 2889 default: ShouldNotReachHere(); 2890 } 2891 #else 2892 2893 switch (code) { 2894 case lir_shl: __ lshl(hi, lo); break; 2895 case lir_shr: __ lshr(hi, lo, true); break; 2896 case lir_ushr: __ lshr(hi, lo, false); break; 2897 default: ShouldNotReachHere(); 2898 } 2899 #endif // LP64 2900 } else { 2901 ShouldNotReachHere(); 2902 } 2903 } 2904 2905 2906 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, jint count, LIR_Opr dest) { 2907 if (dest->is_single_cpu()) { 2908 // first move left into dest so that left is not destroyed by the shift 2909 Register value = dest->as_register(); 2910 count = count & 0x1F; // Java spec 2911 2912 move_regs(left->as_register(), value); 2913 switch (code) { 2914 case lir_shl: __ shll(value, count); break; 2915 case lir_shr: __ sarl(value, count); break; 2916 case lir_ushr: __ shrl(value, count); break; 2917 default: ShouldNotReachHere(); 2918 } 2919 } else if (dest->is_double_cpu()) { 2920 #ifndef _LP64 2921 Unimplemented(); 2922 #else 2923 // first move left into dest so that left is not destroyed by the shift 2924 Register value = dest->as_register_lo(); 2925 count = count & 0x1F; // Java spec 2926 2927 move_regs(left->as_register_lo(), value); 2928 switch (code) { 2929 case lir_shl: __ shlptr(value, count); break; 2930 case lir_shr: __ sarptr(value, count); break; 2931 case lir_ushr: __ shrptr(value, count); break; 2932 default: ShouldNotReachHere(); 2933 } 2934 #endif // _LP64 2935 } else { 2936 ShouldNotReachHere(); 2937 } 2938 } 2939 2940 2941 void LIR_Assembler::store_parameter(Register r, int offset_from_rsp_in_words) { 2942 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 2943 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 2944 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 2945 __ movptr (Address(rsp, offset_from_rsp_in_bytes), r); 2946 } 2947 2948 2949 void LIR_Assembler::store_parameter(jint c, int offset_from_rsp_in_words) { 2950 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 2951 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 2952 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 2953 __ movptr (Address(rsp, offset_from_rsp_in_bytes), c); 2954 } 2955 2956 2957 void LIR_Assembler::store_parameter(jobject o, int offset_from_rsp_in_words) { 2958 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 2959 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 2960 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 2961 __ movoop (Address(rsp, offset_from_rsp_in_bytes), o); 2962 } 2963 2964 2965 void LIR_Assembler::store_parameter(Metadata* m, int offset_from_rsp_in_words) { 2966 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 2967 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 2968 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 2969 __ mov_metadata(Address(rsp, offset_from_rsp_in_bytes), m); 2970 } 2971 2972 2973 // This code replaces a call to arraycopy; no exception may 2974 // be thrown in this code, they must be thrown in the System.arraycopy 2975 // activation frame; we could save some checks if this would not be the case 2976 void LIR_Assembler::emit_arraycopy(LIR_OpArrayCopy* op) { 2977 ciArrayKlass* default_type = op->expected_type(); 2978 Register src = op->src()->as_register(); 2979 Register dst = op->dst()->as_register(); 2980 Register src_pos = op->src_pos()->as_register(); 2981 Register dst_pos = op->dst_pos()->as_register(); 2982 Register length = op->length()->as_register(); 2983 Register tmp = op->tmp()->as_register(); 2984 2985 CodeStub* stub = op->stub(); 2986 int flags = op->flags(); 2987 BasicType basic_type = default_type != NULL ? default_type->element_type()->basic_type() : T_ILLEGAL; 2988 if (basic_type == T_ARRAY) basic_type = T_OBJECT; 2989 2990 // if we don't know anything, just go through the generic arraycopy 2991 if (default_type == NULL) { 2992 Label done; 2993 // save outgoing arguments on stack in case call to System.arraycopy is needed 2994 // HACK ALERT. This code used to push the parameters in a hardwired fashion 2995 // for interpreter calling conventions. Now we have to do it in new style conventions. 2996 // For the moment until C1 gets the new register allocator I just force all the 2997 // args to the right place (except the register args) and then on the back side 2998 // reload the register args properly if we go slow path. Yuck 2999 3000 // These are proper for the calling convention 3001 store_parameter(length, 2); 3002 store_parameter(dst_pos, 1); 3003 store_parameter(dst, 0); 3004 3005 // these are just temporary placements until we need to reload 3006 store_parameter(src_pos, 3); 3007 store_parameter(src, 4); 3008 NOT_LP64(assert(src == rcx && src_pos == rdx, "mismatch in calling convention");) 3009 3010 address C_entry = CAST_FROM_FN_PTR(address, Runtime1::arraycopy); 3011 3012 address copyfunc_addr = StubRoutines::generic_arraycopy(); 3013 3014 // pass arguments: may push as this is not a safepoint; SP must be fix at each safepoint 3015 #ifdef _LP64 3016 // The arguments are in java calling convention so we can trivially shift them to C 3017 // convention 3018 assert_different_registers(c_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4); 3019 __ mov(c_rarg0, j_rarg0); 3020 assert_different_registers(c_rarg1, j_rarg2, j_rarg3, j_rarg4); 3021 __ mov(c_rarg1, j_rarg1); 3022 assert_different_registers(c_rarg2, j_rarg3, j_rarg4); 3023 __ mov(c_rarg2, j_rarg2); 3024 assert_different_registers(c_rarg3, j_rarg4); 3025 __ mov(c_rarg3, j_rarg3); 3026 #ifdef _WIN64 3027 // Allocate abi space for args but be sure to keep stack aligned 3028 __ subptr(rsp, 6*wordSize); 3029 store_parameter(j_rarg4, 4); 3030 if (copyfunc_addr == NULL) { // Use C version if stub was not generated 3031 __ call(RuntimeAddress(C_entry)); 3032 } else { 3033 #ifndef PRODUCT 3034 if (PrintC1Statistics) { 3035 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt)); 3036 } 3037 #endif 3038 __ call(RuntimeAddress(copyfunc_addr)); 3039 } 3040 __ addptr(rsp, 6*wordSize); 3041 #else 3042 __ mov(c_rarg4, j_rarg4); 3043 if (copyfunc_addr == NULL) { // Use C version if stub was not generated 3044 __ call(RuntimeAddress(C_entry)); 3045 } else { 3046 #ifndef PRODUCT 3047 if (PrintC1Statistics) { 3048 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt)); 3049 } 3050 #endif 3051 __ call(RuntimeAddress(copyfunc_addr)); 3052 } 3053 #endif // _WIN64 3054 #else 3055 __ push(length); 3056 __ push(dst_pos); 3057 __ push(dst); 3058 __ push(src_pos); 3059 __ push(src); 3060 3061 if (copyfunc_addr == NULL) { // Use C version if stub was not generated 3062 __ call_VM_leaf(C_entry, 5); // removes pushed parameter from the stack 3063 } else { 3064 #ifndef PRODUCT 3065 if (PrintC1Statistics) { 3066 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt)); 3067 } 3068 #endif 3069 __ call_VM_leaf(copyfunc_addr, 5); // removes pushed parameter from the stack 3070 } 3071 3072 #endif // _LP64 3073 3074 __ cmpl(rax, 0); 3075 __ jcc(Assembler::equal, *stub->continuation()); 3076 3077 if (copyfunc_addr != NULL) { 3078 __ mov(tmp, rax); 3079 __ xorl(tmp, -1); 3080 } 3081 3082 // Reload values from the stack so they are where the stub 3083 // expects them. 3084 __ movptr (dst, Address(rsp, 0*BytesPerWord)); 3085 __ movptr (dst_pos, Address(rsp, 1*BytesPerWord)); 3086 __ movptr (length, Address(rsp, 2*BytesPerWord)); 3087 __ movptr (src_pos, Address(rsp, 3*BytesPerWord)); 3088 __ movptr (src, Address(rsp, 4*BytesPerWord)); 3089 3090 if (copyfunc_addr != NULL) { 3091 __ subl(length, tmp); 3092 __ addl(src_pos, tmp); 3093 __ addl(dst_pos, tmp); 3094 } 3095 __ jmp(*stub->entry()); 3096 3097 __ bind(*stub->continuation()); 3098 return; 3099 } 3100 3101 assert(default_type != NULL && default_type->is_array_klass() && default_type->is_loaded(), "must be true at this point"); 3102 3103 int elem_size = type2aelembytes(basic_type); 3104 Address::ScaleFactor scale; 3105 3106 switch (elem_size) { 3107 case 1 : 3108 scale = Address::times_1; 3109 break; 3110 case 2 : 3111 scale = Address::times_2; 3112 break; 3113 case 4 : 3114 scale = Address::times_4; 3115 break; 3116 case 8 : 3117 scale = Address::times_8; 3118 break; 3119 default: 3120 scale = Address::no_scale; 3121 ShouldNotReachHere(); 3122 } 3123 3124 Address src_length_addr = Address(src, arrayOopDesc::length_offset_in_bytes()); 3125 Address dst_length_addr = Address(dst, arrayOopDesc::length_offset_in_bytes()); 3126 Address src_klass_addr = Address(src, oopDesc::klass_offset_in_bytes()); 3127 Address dst_klass_addr = Address(dst, oopDesc::klass_offset_in_bytes()); 3128 3129 // length and pos's are all sign extended at this point on 64bit 3130 3131 // test for NULL 3132 if (flags & LIR_OpArrayCopy::src_null_check) { 3133 __ testptr(src, src); 3134 __ jcc(Assembler::zero, *stub->entry()); 3135 } 3136 if (flags & LIR_OpArrayCopy::dst_null_check) { 3137 __ testptr(dst, dst); 3138 __ jcc(Assembler::zero, *stub->entry()); 3139 } 3140 3141 // check if negative 3142 if (flags & LIR_OpArrayCopy::src_pos_positive_check) { 3143 __ testl(src_pos, src_pos); 3144 __ jcc(Assembler::less, *stub->entry()); 3145 } 3146 if (flags & LIR_OpArrayCopy::dst_pos_positive_check) { 3147 __ testl(dst_pos, dst_pos); 3148 __ jcc(Assembler::less, *stub->entry()); 3149 } 3150 3151 if (flags & LIR_OpArrayCopy::src_range_check) { 3152 __ lea(tmp, Address(src_pos, length, Address::times_1, 0)); 3153 __ cmpl(tmp, src_length_addr); 3154 __ jcc(Assembler::above, *stub->entry()); 3155 } 3156 if (flags & LIR_OpArrayCopy::dst_range_check) { 3157 __ lea(tmp, Address(dst_pos, length, Address::times_1, 0)); 3158 __ cmpl(tmp, dst_length_addr); 3159 __ jcc(Assembler::above, *stub->entry()); 3160 } 3161 3162 if (flags & LIR_OpArrayCopy::length_positive_check) { 3163 __ testl(length, length); 3164 __ jcc(Assembler::less, *stub->entry()); 3165 __ jcc(Assembler::zero, *stub->continuation()); 3166 } 3167 3168 #ifdef _LP64 3169 __ movl2ptr(src_pos, src_pos); //higher 32bits must be null 3170 __ movl2ptr(dst_pos, dst_pos); //higher 32bits must be null 3171 #endif 3172 3173 if (flags & LIR_OpArrayCopy::type_check) { 3174 // We don't know the array types are compatible 3175 if (basic_type != T_OBJECT) { 3176 // Simple test for basic type arrays 3177 if (UseCompressedClassPointers) { 3178 __ movl(tmp, src_klass_addr); 3179 __ cmpl(tmp, dst_klass_addr); 3180 } else { 3181 __ movptr(tmp, src_klass_addr); 3182 __ cmpptr(tmp, dst_klass_addr); 3183 } 3184 __ jcc(Assembler::notEqual, *stub->entry()); 3185 } else { 3186 // For object arrays, if src is a sub class of dst then we can 3187 // safely do the copy. 3188 Label cont, slow; 3189 3190 __ push(src); 3191 __ push(dst); 3192 3193 __ load_klass(src, src); 3194 __ load_klass(dst, dst); 3195 3196 __ check_klass_subtype_fast_path(src, dst, tmp, &cont, &slow, NULL); 3197 3198 __ push(src); 3199 __ push(dst); 3200 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 3201 __ pop(dst); 3202 __ pop(src); 3203 3204 __ cmpl(src, 0); 3205 __ jcc(Assembler::notEqual, cont); 3206 3207 __ bind(slow); 3208 __ pop(dst); 3209 __ pop(src); 3210 3211 address copyfunc_addr = StubRoutines::checkcast_arraycopy(); 3212 if (copyfunc_addr != NULL) { // use stub if available 3213 // src is not a sub class of dst so we have to do a 3214 // per-element check. 3215 3216 int mask = LIR_OpArrayCopy::src_objarray|LIR_OpArrayCopy::dst_objarray; 3217 if ((flags & mask) != mask) { 3218 // Check that at least both of them object arrays. 3219 assert(flags & mask, "one of the two should be known to be an object array"); 3220 3221 if (!(flags & LIR_OpArrayCopy::src_objarray)) { 3222 __ load_klass(tmp, src); 3223 } else if (!(flags & LIR_OpArrayCopy::dst_objarray)) { 3224 __ load_klass(tmp, dst); 3225 } 3226 int lh_offset = in_bytes(Klass::layout_helper_offset()); 3227 Address klass_lh_addr(tmp, lh_offset); 3228 jint objArray_lh = Klass::array_layout_helper(T_OBJECT); 3229 __ cmpl(klass_lh_addr, objArray_lh); 3230 __ jcc(Assembler::notEqual, *stub->entry()); 3231 } 3232 3233 // Spill because stubs can use any register they like and it's 3234 // easier to restore just those that we care about. 3235 store_parameter(dst, 0); 3236 store_parameter(dst_pos, 1); 3237 store_parameter(length, 2); 3238 store_parameter(src_pos, 3); 3239 store_parameter(src, 4); 3240 3241 #ifndef _LP64 3242 __ movptr(tmp, dst_klass_addr); 3243 __ movptr(tmp, Address(tmp, ObjArrayKlass::element_klass_offset())); 3244 __ push(tmp); 3245 __ movl(tmp, Address(tmp, Klass::super_check_offset_offset())); 3246 __ push(tmp); 3247 __ push(length); 3248 __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3249 __ push(tmp); 3250 __ lea(tmp, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3251 __ push(tmp); 3252 3253 __ call_VM_leaf(copyfunc_addr, 5); 3254 #else 3255 __ movl2ptr(length, length); //higher 32bits must be null 3256 3257 __ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3258 assert_different_registers(c_rarg0, dst, dst_pos, length); 3259 __ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3260 assert_different_registers(c_rarg1, dst, length); 3261 3262 __ mov(c_rarg2, length); 3263 assert_different_registers(c_rarg2, dst); 3264 3265 #ifdef _WIN64 3266 // Allocate abi space for args but be sure to keep stack aligned 3267 __ subptr(rsp, 6*wordSize); 3268 __ load_klass(c_rarg3, dst); 3269 __ movptr(c_rarg3, Address(c_rarg3, ObjArrayKlass::element_klass_offset())); 3270 store_parameter(c_rarg3, 4); 3271 __ movl(c_rarg3, Address(c_rarg3, Klass::super_check_offset_offset())); 3272 __ call(RuntimeAddress(copyfunc_addr)); 3273 __ addptr(rsp, 6*wordSize); 3274 #else 3275 __ load_klass(c_rarg4, dst); 3276 __ movptr(c_rarg4, Address(c_rarg4, ObjArrayKlass::element_klass_offset())); 3277 __ movl(c_rarg3, Address(c_rarg4, Klass::super_check_offset_offset())); 3278 __ call(RuntimeAddress(copyfunc_addr)); 3279 #endif 3280 3281 #endif 3282 3283 #ifndef PRODUCT 3284 if (PrintC1Statistics) { 3285 Label failed; 3286 __ testl(rax, rax); 3287 __ jcc(Assembler::notZero, failed); 3288 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_cnt)); 3289 __ bind(failed); 3290 } 3291 #endif 3292 3293 __ testl(rax, rax); 3294 __ jcc(Assembler::zero, *stub->continuation()); 3295 3296 #ifndef PRODUCT 3297 if (PrintC1Statistics) { 3298 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_attempt_cnt)); 3299 } 3300 #endif 3301 3302 __ mov(tmp, rax); 3303 3304 __ xorl(tmp, -1); 3305 3306 // Restore previously spilled arguments 3307 __ movptr (dst, Address(rsp, 0*BytesPerWord)); 3308 __ movptr (dst_pos, Address(rsp, 1*BytesPerWord)); 3309 __ movptr (length, Address(rsp, 2*BytesPerWord)); 3310 __ movptr (src_pos, Address(rsp, 3*BytesPerWord)); 3311 __ movptr (src, Address(rsp, 4*BytesPerWord)); 3312 3313 3314 __ subl(length, tmp); 3315 __ addl(src_pos, tmp); 3316 __ addl(dst_pos, tmp); 3317 } 3318 3319 __ jmp(*stub->entry()); 3320 3321 __ bind(cont); 3322 __ pop(dst); 3323 __ pop(src); 3324 } 3325 } 3326 3327 #ifdef ASSERT 3328 if (basic_type != T_OBJECT || !(flags & LIR_OpArrayCopy::type_check)) { 3329 // Sanity check the known type with the incoming class. For the 3330 // primitive case the types must match exactly with src.klass and 3331 // dst.klass each exactly matching the default type. For the 3332 // object array case, if no type check is needed then either the 3333 // dst type is exactly the expected type and the src type is a 3334 // subtype which we can't check or src is the same array as dst 3335 // but not necessarily exactly of type default_type. 3336 Label known_ok, halt; 3337 __ mov_metadata(tmp, default_type->constant_encoding()); 3338 #ifdef _LP64 3339 if (UseCompressedClassPointers) { 3340 __ encode_klass_not_null(tmp); 3341 } 3342 #endif 3343 3344 if (basic_type != T_OBJECT) { 3345 3346 if (UseCompressedClassPointers) __ cmpl(tmp, dst_klass_addr); 3347 else __ cmpptr(tmp, dst_klass_addr); 3348 __ jcc(Assembler::notEqual, halt); 3349 if (UseCompressedClassPointers) __ cmpl(tmp, src_klass_addr); 3350 else __ cmpptr(tmp, src_klass_addr); 3351 __ jcc(Assembler::equal, known_ok); 3352 } else { 3353 if (UseCompressedClassPointers) __ cmpl(tmp, dst_klass_addr); 3354 else __ cmpptr(tmp, dst_klass_addr); 3355 __ jcc(Assembler::equal, known_ok); 3356 __ cmpptr(src, dst); 3357 __ jcc(Assembler::equal, known_ok); 3358 } 3359 __ bind(halt); 3360 __ stop("incorrect type information in arraycopy"); 3361 __ bind(known_ok); 3362 } 3363 #endif 3364 3365 #ifndef PRODUCT 3366 if (PrintC1Statistics) { 3367 __ incrementl(ExternalAddress(Runtime1::arraycopy_count_address(basic_type))); 3368 } 3369 #endif 3370 3371 #ifdef _LP64 3372 assert_different_registers(c_rarg0, dst, dst_pos, length); 3373 __ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3374 assert_different_registers(c_rarg1, length); 3375 __ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3376 __ mov(c_rarg2, length); 3377 3378 #else 3379 __ lea(tmp, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3380 store_parameter(tmp, 0); 3381 __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3382 store_parameter(tmp, 1); 3383 store_parameter(length, 2); 3384 #endif // _LP64 3385 3386 bool disjoint = (flags & LIR_OpArrayCopy::overlapping) == 0; 3387 bool aligned = (flags & LIR_OpArrayCopy::unaligned) == 0; 3388 const char *name; 3389 address entry = StubRoutines::select_arraycopy_function(basic_type, aligned, disjoint, name, false); 3390 __ call_VM_leaf(entry, 0); 3391 3392 __ bind(*stub->continuation()); 3393 } 3394 3395 void LIR_Assembler::emit_updatecrc32(LIR_OpUpdateCRC32* op) { 3396 assert(op->crc()->is_single_cpu(), "crc must be register"); 3397 assert(op->val()->is_single_cpu(), "byte value must be register"); 3398 assert(op->result_opr()->is_single_cpu(), "result must be register"); 3399 Register crc = op->crc()->as_register(); 3400 Register val = op->val()->as_register(); 3401 Register res = op->result_opr()->as_register(); 3402 3403 assert_different_registers(val, crc, res); 3404 3405 __ lea(res, ExternalAddress(StubRoutines::crc_table_addr())); 3406 __ notl(crc); // ~crc 3407 __ update_byte_crc32(crc, val, res); 3408 __ notl(crc); // ~crc 3409 __ mov(res, crc); 3410 } 3411 3412 void LIR_Assembler::emit_lock(LIR_OpLock* op) { 3413 Register obj = op->obj_opr()->as_register(); // may not be an oop 3414 Register hdr = op->hdr_opr()->as_register(); 3415 Register lock = op->lock_opr()->as_register(); 3416 if (!UseFastLocking) { 3417 __ jmp(*op->stub()->entry()); 3418 } else if (op->code() == lir_lock) { 3419 Register scratch = noreg; 3420 if (UseBiasedLocking) { 3421 scratch = op->scratch_opr()->as_register(); 3422 } 3423 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header"); 3424 // add debug info for NullPointerException only if one is possible 3425 int null_check_offset = __ lock_object(hdr, obj, lock, scratch, *op->stub()->entry()); 3426 if (op->info() != NULL) { 3427 add_debug_info_for_null_check(null_check_offset, op->info()); 3428 } 3429 // done 3430 } else if (op->code() == lir_unlock) { 3431 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header"); 3432 __ unlock_object(hdr, obj, lock, *op->stub()->entry()); 3433 } else { 3434 Unimplemented(); 3435 } 3436 __ bind(*op->stub()->continuation()); 3437 } 3438 3439 3440 void LIR_Assembler::emit_profile_call(LIR_OpProfileCall* op) { 3441 ciMethod* method = op->profiled_method(); 3442 int bci = op->profiled_bci(); 3443 ciMethod* callee = op->profiled_callee(); 3444 3445 // Update counter for all call types 3446 ciMethodData* md = method->method_data_or_null(); 3447 assert(md != NULL, "Sanity"); 3448 ciProfileData* data = md->bci_to_data(bci); 3449 assert(data->is_CounterData(), "need CounterData for calls"); 3450 assert(op->mdo()->is_single_cpu(), "mdo must be allocated"); 3451 Register mdo = op->mdo()->as_register(); 3452 __ mov_metadata(mdo, md->constant_encoding()); 3453 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset())); 3454 Bytecodes::Code bc = method->java_code_at_bci(bci); 3455 const bool callee_is_static = callee->is_loaded() && callee->is_static(); 3456 // Perform additional virtual call profiling for invokevirtual and 3457 // invokeinterface bytecodes 3458 if ((bc == Bytecodes::_invokevirtual || bc == Bytecodes::_invokeinterface) && 3459 !callee_is_static && // required for optimized MH invokes 3460 C1ProfileVirtualCalls) { 3461 assert(op->recv()->is_single_cpu(), "recv must be allocated"); 3462 Register recv = op->recv()->as_register(); 3463 assert_different_registers(mdo, recv); 3464 assert(data->is_VirtualCallData(), "need VirtualCallData for virtual calls"); 3465 ciKlass* known_klass = op->known_holder(); 3466 if (C1OptimizeVirtualCallProfiling && known_klass != NULL) { 3467 // We know the type that will be seen at this call site; we can 3468 // statically update the MethodData* rather than needing to do 3469 // dynamic tests on the receiver type 3470 3471 // NOTE: we should probably put a lock around this search to 3472 // avoid collisions by concurrent compilations 3473 ciVirtualCallData* vc_data = (ciVirtualCallData*) data; 3474 uint i; 3475 for (i = 0; i < VirtualCallData::row_limit(); i++) { 3476 ciKlass* receiver = vc_data->receiver(i); 3477 if (known_klass->equals(receiver)) { 3478 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i))); 3479 __ addptr(data_addr, DataLayout::counter_increment); 3480 return; 3481 } 3482 } 3483 3484 // Receiver type not found in profile data; select an empty slot 3485 3486 // Note that this is less efficient than it should be because it 3487 // always does a write to the receiver part of the 3488 // VirtualCallData rather than just the first time 3489 for (i = 0; i < VirtualCallData::row_limit(); i++) { 3490 ciKlass* receiver = vc_data->receiver(i); 3491 if (receiver == NULL) { 3492 Address recv_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_offset(i))); 3493 __ mov_metadata(recv_addr, known_klass->constant_encoding()); 3494 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i))); 3495 __ addptr(data_addr, DataLayout::counter_increment); 3496 return; 3497 } 3498 } 3499 } else { 3500 __ load_klass(recv, recv); 3501 Label update_done; 3502 type_profile_helper(mdo, md, data, recv, &update_done); 3503 // Receiver did not match any saved receiver and there is no empty row for it. 3504 // Increment total counter to indicate polymorphic case. 3505 __ addptr(counter_addr, DataLayout::counter_increment); 3506 3507 __ bind(update_done); 3508 } 3509 } else { 3510 // Static call 3511 __ addptr(counter_addr, DataLayout::counter_increment); 3512 } 3513 } 3514 3515 void LIR_Assembler::emit_profile_type(LIR_OpProfileType* op) { 3516 Register obj = op->obj()->as_register(); 3517 Register tmp = op->tmp()->as_pointer_register(); 3518 Address mdo_addr = as_Address(op->mdp()->as_address_ptr()); 3519 ciKlass* exact_klass = op->exact_klass(); 3520 intptr_t current_klass = op->current_klass(); 3521 bool not_null = op->not_null(); 3522 bool no_conflict = op->no_conflict(); 3523 3524 Label update, next, none; 3525 3526 bool do_null = !not_null; 3527 bool exact_klass_set = exact_klass != NULL && ciTypeEntries::valid_ciklass(current_klass) == exact_klass; 3528 bool do_update = !TypeEntries::is_type_unknown(current_klass) && !exact_klass_set; 3529 3530 assert(do_null || do_update, "why are we here?"); 3531 assert(!TypeEntries::was_null_seen(current_klass) || do_update, "why are we here?"); 3532 3533 __ verify_oop(obj); 3534 3535 if (tmp != obj) { 3536 __ mov(tmp, obj); 3537 } 3538 if (do_null) { 3539 __ testptr(tmp, tmp); 3540 __ jccb(Assembler::notZero, update); 3541 if (!TypeEntries::was_null_seen(current_klass)) { 3542 __ orptr(mdo_addr, TypeEntries::null_seen); 3543 } 3544 if (do_update) { 3545 #ifndef ASSERT 3546 __ jmpb(next); 3547 } 3548 #else 3549 __ jmp(next); 3550 } 3551 } else { 3552 __ testptr(tmp, tmp); 3553 __ jccb(Assembler::notZero, update); 3554 __ stop("unexpect null obj"); 3555 #endif 3556 } 3557 3558 __ bind(update); 3559 3560 if (do_update) { 3561 #ifdef ASSERT 3562 if (exact_klass != NULL) { 3563 Label ok; 3564 __ load_klass(tmp, tmp); 3565 __ push(tmp); 3566 __ mov_metadata(tmp, exact_klass->constant_encoding()); 3567 __ cmpptr(tmp, Address(rsp, 0)); 3568 __ jccb(Assembler::equal, ok); 3569 __ stop("exact klass and actual klass differ"); 3570 __ bind(ok); 3571 __ pop(tmp); 3572 } 3573 #endif 3574 if (!no_conflict) { 3575 if (exact_klass == NULL || TypeEntries::is_type_none(current_klass)) { 3576 if (exact_klass != NULL) { 3577 __ mov_metadata(tmp, exact_klass->constant_encoding()); 3578 } else { 3579 __ load_klass(tmp, tmp); 3580 } 3581 3582 __ xorptr(tmp, mdo_addr); 3583 __ testptr(tmp, TypeEntries::type_klass_mask); 3584 // klass seen before, nothing to do. The unknown bit may have been 3585 // set already but no need to check. 3586 __ jccb(Assembler::zero, next); 3587 3588 __ testptr(tmp, TypeEntries::type_unknown); 3589 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore. 3590 3591 if (TypeEntries::is_type_none(current_klass)) { 3592 __ cmpptr(mdo_addr, 0); 3593 __ jccb(Assembler::equal, none); 3594 __ cmpptr(mdo_addr, TypeEntries::null_seen); 3595 __ jccb(Assembler::equal, none); 3596 // There is a chance that the checks above (re-reading profiling 3597 // data from memory) fail if another thread has just set the 3598 // profiling to this obj's klass 3599 __ xorptr(tmp, mdo_addr); 3600 __ testptr(tmp, TypeEntries::type_klass_mask); 3601 __ jccb(Assembler::zero, next); 3602 } 3603 } else { 3604 assert(ciTypeEntries::valid_ciklass(current_klass) != NULL && 3605 ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "conflict only"); 3606 3607 __ movptr(tmp, mdo_addr); 3608 __ testptr(tmp, TypeEntries::type_unknown); 3609 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore. 3610 } 3611 3612 // different than before. Cannot keep accurate profile. 3613 __ orptr(mdo_addr, TypeEntries::type_unknown); 3614 3615 if (TypeEntries::is_type_none(current_klass)) { 3616 __ jmpb(next); 3617 3618 __ bind(none); 3619 // first time here. Set profile type. 3620 __ movptr(mdo_addr, tmp); 3621 } 3622 } else { 3623 // There's a single possible klass at this profile point 3624 assert(exact_klass != NULL, "should be"); 3625 if (TypeEntries::is_type_none(current_klass)) { 3626 __ mov_metadata(tmp, exact_klass->constant_encoding()); 3627 __ xorptr(tmp, mdo_addr); 3628 __ testptr(tmp, TypeEntries::type_klass_mask); 3629 #ifdef ASSERT 3630 __ jcc(Assembler::zero, next); 3631 3632 { 3633 Label ok; 3634 __ push(tmp); 3635 __ cmpptr(mdo_addr, 0); 3636 __ jcc(Assembler::equal, ok); 3637 __ cmpptr(mdo_addr, TypeEntries::null_seen); 3638 __ jcc(Assembler::equal, ok); 3639 // may have been set by another thread 3640 __ mov_metadata(tmp, exact_klass->constant_encoding()); 3641 __ xorptr(tmp, mdo_addr); 3642 __ testptr(tmp, TypeEntries::type_mask); 3643 __ jcc(Assembler::zero, ok); 3644 3645 __ stop("unexpected profiling mismatch"); 3646 __ bind(ok); 3647 __ pop(tmp); 3648 } 3649 #else 3650 __ jccb(Assembler::zero, next); 3651 #endif 3652 // first time here. Set profile type. 3653 __ movptr(mdo_addr, tmp); 3654 } else { 3655 assert(ciTypeEntries::valid_ciklass(current_klass) != NULL && 3656 ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "inconsistent"); 3657 3658 __ movptr(tmp, mdo_addr); 3659 __ testptr(tmp, TypeEntries::type_unknown); 3660 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore. 3661 3662 __ orptr(mdo_addr, TypeEntries::type_unknown); 3663 } 3664 } 3665 3666 __ bind(next); 3667 } 3668 } 3669 3670 void LIR_Assembler::emit_delay(LIR_OpDelay*) { 3671 Unimplemented(); 3672 } 3673 3674 3675 void LIR_Assembler::monitor_address(int monitor_no, LIR_Opr dst) { 3676 __ lea(dst->as_register(), frame_map()->address_for_monitor_lock(monitor_no)); 3677 } 3678 3679 3680 void LIR_Assembler::align_backward_branch_target() { 3681 __ align(BytesPerWord); 3682 } 3683 3684 3685 void LIR_Assembler::negate(LIR_Opr left, LIR_Opr dest) { 3686 if (left->is_single_cpu()) { 3687 __ negl(left->as_register()); 3688 move_regs(left->as_register(), dest->as_register()); 3689 3690 } else if (left->is_double_cpu()) { 3691 Register lo = left->as_register_lo(); 3692 #ifdef _LP64 3693 Register dst = dest->as_register_lo(); 3694 __ movptr(dst, lo); 3695 __ negptr(dst); 3696 #else 3697 Register hi = left->as_register_hi(); 3698 __ lneg(hi, lo); 3699 if (dest->as_register_lo() == hi) { 3700 assert(dest->as_register_hi() != lo, "destroying register"); 3701 move_regs(hi, dest->as_register_hi()); 3702 move_regs(lo, dest->as_register_lo()); 3703 } else { 3704 move_regs(lo, dest->as_register_lo()); 3705 move_regs(hi, dest->as_register_hi()); 3706 } 3707 #endif // _LP64 3708 3709 } else if (dest->is_single_xmm()) { 3710 if (left->as_xmm_float_reg() != dest->as_xmm_float_reg()) { 3711 __ movflt(dest->as_xmm_float_reg(), left->as_xmm_float_reg()); 3712 } 3713 if (UseAVX > 0) { 3714 __ vnegatess(dest->as_xmm_float_reg(), dest->as_xmm_float_reg(), 3715 ExternalAddress((address)float_signflip_pool)); 3716 } else { 3717 __ xorps(dest->as_xmm_float_reg(), 3718 ExternalAddress((address)float_signflip_pool)); 3719 } 3720 } else if (dest->is_double_xmm()) { 3721 if (left->as_xmm_double_reg() != dest->as_xmm_double_reg()) { 3722 __ movdbl(dest->as_xmm_double_reg(), left->as_xmm_double_reg()); 3723 } 3724 if (UseAVX > 0) { 3725 __ vnegatesd(dest->as_xmm_double_reg(), dest->as_xmm_double_reg(), 3726 ExternalAddress((address)double_signflip_pool)); 3727 } else { 3728 __ xorpd(dest->as_xmm_double_reg(), 3729 ExternalAddress((address)double_signflip_pool)); 3730 } 3731 } else if (left->is_single_fpu() || left->is_double_fpu()) { 3732 assert(left->fpu() == 0, "arg must be on TOS"); 3733 assert(dest->fpu() == 0, "dest must be TOS"); 3734 __ fchs(); 3735 3736 } else { 3737 ShouldNotReachHere(); 3738 } 3739 } 3740 3741 3742 void LIR_Assembler::leal(LIR_Opr addr, LIR_Opr dest) { 3743 assert(addr->is_address() && dest->is_register(), "check"); 3744 Register reg; 3745 reg = dest->as_pointer_register(); 3746 __ lea(reg, as_Address(addr->as_address_ptr())); 3747 } 3748 3749 3750 3751 void LIR_Assembler::rt_call(LIR_Opr result, address dest, const LIR_OprList* args, LIR_Opr tmp, CodeEmitInfo* info) { 3752 assert(!tmp->is_valid(), "don't need temporary"); 3753 __ call(RuntimeAddress(dest)); 3754 if (info != NULL) { 3755 add_call_info_here(info); 3756 } 3757 } 3758 3759 3760 void LIR_Assembler::volatile_move_op(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info) { 3761 assert(type == T_LONG, "only for volatile long fields"); 3762 3763 if (info != NULL) { 3764 add_debug_info_for_null_check_here(info); 3765 } 3766 3767 if (src->is_double_xmm()) { 3768 if (dest->is_double_cpu()) { 3769 #ifdef _LP64 3770 __ movdq(dest->as_register_lo(), src->as_xmm_double_reg()); 3771 #else 3772 __ movdl(dest->as_register_lo(), src->as_xmm_double_reg()); 3773 __ psrlq(src->as_xmm_double_reg(), 32); 3774 __ movdl(dest->as_register_hi(), src->as_xmm_double_reg()); 3775 #endif // _LP64 3776 } else if (dest->is_double_stack()) { 3777 __ movdbl(frame_map()->address_for_slot(dest->double_stack_ix()), src->as_xmm_double_reg()); 3778 } else if (dest->is_address()) { 3779 __ movdbl(as_Address(dest->as_address_ptr()), src->as_xmm_double_reg()); 3780 } else { 3781 ShouldNotReachHere(); 3782 } 3783 3784 } else if (dest->is_double_xmm()) { 3785 if (src->is_double_stack()) { 3786 __ movdbl(dest->as_xmm_double_reg(), frame_map()->address_for_slot(src->double_stack_ix())); 3787 } else if (src->is_address()) { 3788 __ movdbl(dest->as_xmm_double_reg(), as_Address(src->as_address_ptr())); 3789 } else { 3790 ShouldNotReachHere(); 3791 } 3792 3793 } else if (src->is_double_fpu()) { 3794 assert(src->fpu_regnrLo() == 0, "must be TOS"); 3795 if (dest->is_double_stack()) { 3796 __ fistp_d(frame_map()->address_for_slot(dest->double_stack_ix())); 3797 } else if (dest->is_address()) { 3798 __ fistp_d(as_Address(dest->as_address_ptr())); 3799 } else { 3800 ShouldNotReachHere(); 3801 } 3802 3803 } else if (dest->is_double_fpu()) { 3804 assert(dest->fpu_regnrLo() == 0, "must be TOS"); 3805 if (src->is_double_stack()) { 3806 __ fild_d(frame_map()->address_for_slot(src->double_stack_ix())); 3807 } else if (src->is_address()) { 3808 __ fild_d(as_Address(src->as_address_ptr())); 3809 } else { 3810 ShouldNotReachHere(); 3811 } 3812 } else { 3813 ShouldNotReachHere(); 3814 } 3815 } 3816 3817 #ifdef ASSERT 3818 // emit run-time assertion 3819 void LIR_Assembler::emit_assert(LIR_OpAssert* op) { 3820 assert(op->code() == lir_assert, "must be"); 3821 3822 if (op->in_opr1()->is_valid()) { 3823 assert(op->in_opr2()->is_valid(), "both operands must be valid"); 3824 comp_op(op->condition(), op->in_opr1(), op->in_opr2(), op); 3825 } else { 3826 assert(op->in_opr2()->is_illegal(), "both operands must be illegal"); 3827 assert(op->condition() == lir_cond_always, "no other conditions allowed"); 3828 } 3829 3830 Label ok; 3831 if (op->condition() != lir_cond_always) { 3832 Assembler::Condition acond = Assembler::zero; 3833 switch (op->condition()) { 3834 case lir_cond_equal: acond = Assembler::equal; break; 3835 case lir_cond_notEqual: acond = Assembler::notEqual; break; 3836 case lir_cond_less: acond = Assembler::less; break; 3837 case lir_cond_lessEqual: acond = Assembler::lessEqual; break; 3838 case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break; 3839 case lir_cond_greater: acond = Assembler::greater; break; 3840 case lir_cond_belowEqual: acond = Assembler::belowEqual; break; 3841 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; break; 3842 default: ShouldNotReachHere(); 3843 } 3844 __ jcc(acond, ok); 3845 } 3846 if (op->halt()) { 3847 const char* str = __ code_string(op->msg()); 3848 __ stop(str); 3849 } else { 3850 breakpoint(); 3851 } 3852 __ bind(ok); 3853 } 3854 #endif 3855 3856 void LIR_Assembler::membar() { 3857 // QQQ sparc TSO uses this, 3858 __ membar( Assembler::Membar_mask_bits(Assembler::StoreLoad)); 3859 } 3860 3861 void LIR_Assembler::membar_acquire() { 3862 // No x86 machines currently require load fences 3863 } 3864 3865 void LIR_Assembler::membar_release() { 3866 // No x86 machines currently require store fences 3867 } 3868 3869 void LIR_Assembler::membar_loadload() { 3870 // no-op 3871 //__ membar(Assembler::Membar_mask_bits(Assembler::loadload)); 3872 } 3873 3874 void LIR_Assembler::membar_storestore() { 3875 // no-op 3876 //__ membar(Assembler::Membar_mask_bits(Assembler::storestore)); 3877 } 3878 3879 void LIR_Assembler::membar_loadstore() { 3880 // no-op 3881 //__ membar(Assembler::Membar_mask_bits(Assembler::loadstore)); 3882 } 3883 3884 void LIR_Assembler::membar_storeload() { 3885 __ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad)); 3886 } 3887 3888 void LIR_Assembler::get_thread(LIR_Opr result_reg) { 3889 assert(result_reg->is_register(), "check"); 3890 #ifdef _LP64 3891 // __ get_thread(result_reg->as_register_lo()); 3892 __ mov(result_reg->as_register(), r15_thread); 3893 #else 3894 __ get_thread(result_reg->as_register()); 3895 #endif // _LP64 3896 } 3897 3898 3899 void LIR_Assembler::peephole(LIR_List*) { 3900 // do nothing for now 3901 } 3902 3903 void LIR_Assembler::atomic_op(LIR_Code code, LIR_Opr src, LIR_Opr data, LIR_Opr dest, LIR_Opr tmp) { 3904 assert(data == dest, "xchg/xadd uses only 2 operands"); 3905 3906 if (data->type() == T_INT) { 3907 if (code == lir_xadd) { 3908 if (os::is_MP()) { 3909 __ lock(); 3910 } 3911 __ xaddl(as_Address(src->as_address_ptr()), data->as_register()); 3912 } else { 3913 __ xchgl(data->as_register(), as_Address(src->as_address_ptr())); 3914 } 3915 } else if (data->is_oop()) { 3916 assert (code == lir_xchg, "xadd for oops"); 3917 Register obj = data->as_register(); 3918 #ifdef _LP64 3919 if (UseCompressedOops) { 3920 __ encode_heap_oop(obj); 3921 __ xchgl(obj, as_Address(src->as_address_ptr())); 3922 __ decode_heap_oop(obj); 3923 } else { 3924 __ xchgptr(obj, as_Address(src->as_address_ptr())); 3925 } 3926 #else 3927 __ xchgl(obj, as_Address(src->as_address_ptr())); 3928 #endif 3929 } else if (data->type() == T_LONG) { 3930 #ifdef _LP64 3931 assert(data->as_register_lo() == data->as_register_hi(), "should be a single register"); 3932 if (code == lir_xadd) { 3933 if (os::is_MP()) { 3934 __ lock(); 3935 } 3936 __ xaddq(as_Address(src->as_address_ptr()), data->as_register_lo()); 3937 } else { 3938 __ xchgq(data->as_register_lo(), as_Address(src->as_address_ptr())); 3939 } 3940 #else 3941 ShouldNotReachHere(); 3942 #endif 3943 } else { 3944 ShouldNotReachHere(); 3945 } 3946 } 3947 3948 #undef __