1 /* 2 * Copyright (c) 2000, 2016, 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 (BasicObjectLock::size() * 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 if (StackReservedPages > 0 && compilation()->has_reserved_stack_access()) { 522 __ reserved_stack_check(); 523 } 524 525 bool result_is_oop = result->is_valid() ? result->is_oop() : false; 526 527 // Note: we do not need to round double result; float result has the right precision 528 // the poll sets the condition code, but no data registers 529 AddressLiteral polling_page(os::get_polling_page(), relocInfo::poll_return_type); 530 531 if (Assembler::is_polling_page_far()) { 532 __ lea(rscratch1, polling_page); 533 __ relocate(relocInfo::poll_return_type); 534 __ testl(rax, Address(rscratch1, 0)); 535 } else { 536 __ testl(rax, polling_page); 537 } 538 __ ret(0); 539 } 540 541 542 int LIR_Assembler::safepoint_poll(LIR_Opr tmp, CodeEmitInfo* info) { 543 AddressLiteral polling_page(os::get_polling_page(), relocInfo::poll_type); 544 guarantee(info != NULL, "Shouldn't be NULL"); 545 int offset = __ offset(); 546 if (Assembler::is_polling_page_far()) { 547 __ lea(rscratch1, polling_page); 548 offset = __ offset(); 549 add_debug_info_for_branch(info); 550 __ relocate(relocInfo::poll_type); 551 __ testl(rax, Address(rscratch1, 0)); 552 } else { 553 add_debug_info_for_branch(info); 554 __ testl(rax, polling_page); 555 } 556 return offset; 557 } 558 559 560 void LIR_Assembler::move_regs(Register from_reg, Register to_reg) { 561 if (from_reg != to_reg) __ mov(to_reg, from_reg); 562 } 563 564 void LIR_Assembler::swap_reg(Register a, Register b) { 565 __ xchgptr(a, b); 566 } 567 568 569 void LIR_Assembler::const2reg(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) { 570 assert(src->is_constant(), "should not call otherwise"); 571 assert(dest->is_register(), "should not call otherwise"); 572 LIR_Const* c = src->as_constant_ptr(); 573 574 switch (c->type()) { 575 case T_INT: { 576 assert(patch_code == lir_patch_none, "no patching handled here"); 577 __ movl(dest->as_register(), c->as_jint()); 578 break; 579 } 580 581 case T_ADDRESS: { 582 assert(patch_code == lir_patch_none, "no patching handled here"); 583 __ movptr(dest->as_register(), c->as_jint()); 584 break; 585 } 586 587 case T_LONG: { 588 assert(patch_code == lir_patch_none, "no patching handled here"); 589 #ifdef _LP64 590 __ movptr(dest->as_register_lo(), (intptr_t)c->as_jlong()); 591 #else 592 __ movptr(dest->as_register_lo(), c->as_jint_lo()); 593 __ movptr(dest->as_register_hi(), c->as_jint_hi()); 594 #endif // _LP64 595 break; 596 } 597 598 case T_OBJECT: { 599 if (patch_code != lir_patch_none) { 600 jobject2reg_with_patching(dest->as_register(), info); 601 } else { 602 __ movoop(dest->as_register(), c->as_jobject()); 603 } 604 break; 605 } 606 607 case T_METADATA: { 608 if (patch_code != lir_patch_none) { 609 klass2reg_with_patching(dest->as_register(), info); 610 } else { 611 __ mov_metadata(dest->as_register(), c->as_metadata()); 612 } 613 break; 614 } 615 616 case T_FLOAT: { 617 if (dest->is_single_xmm()) { 618 if (c->is_zero_float()) { 619 __ xorps(dest->as_xmm_float_reg(), dest->as_xmm_float_reg()); 620 } else { 621 __ movflt(dest->as_xmm_float_reg(), 622 InternalAddress(float_constant(c->as_jfloat()))); 623 } 624 } else { 625 assert(dest->is_single_fpu(), "must be"); 626 assert(dest->fpu_regnr() == 0, "dest must be TOS"); 627 if (c->is_zero_float()) { 628 __ fldz(); 629 } else if (c->is_one_float()) { 630 __ fld1(); 631 } else { 632 __ fld_s (InternalAddress(float_constant(c->as_jfloat()))); 633 } 634 } 635 break; 636 } 637 638 case T_DOUBLE: { 639 if (dest->is_double_xmm()) { 640 if (c->is_zero_double()) { 641 __ xorpd(dest->as_xmm_double_reg(), dest->as_xmm_double_reg()); 642 } else { 643 __ movdbl(dest->as_xmm_double_reg(), 644 InternalAddress(double_constant(c->as_jdouble()))); 645 } 646 } else { 647 assert(dest->is_double_fpu(), "must be"); 648 assert(dest->fpu_regnrLo() == 0, "dest must be TOS"); 649 if (c->is_zero_double()) { 650 __ fldz(); 651 } else if (c->is_one_double()) { 652 __ fld1(); 653 } else { 654 __ fld_d (InternalAddress(double_constant(c->as_jdouble()))); 655 } 656 } 657 break; 658 } 659 660 default: 661 ShouldNotReachHere(); 662 } 663 } 664 665 void LIR_Assembler::const2stack(LIR_Opr src, LIR_Opr dest) { 666 assert(src->is_constant(), "should not call otherwise"); 667 assert(dest->is_stack(), "should not call otherwise"); 668 LIR_Const* c = src->as_constant_ptr(); 669 670 switch (c->type()) { 671 case T_INT: // fall through 672 case T_FLOAT: 673 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits()); 674 break; 675 676 case T_ADDRESS: 677 __ movptr(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits()); 678 break; 679 680 case T_OBJECT: 681 __ movoop(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jobject()); 682 break; 683 684 case T_LONG: // fall through 685 case T_DOUBLE: 686 #ifdef _LP64 687 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(), 688 lo_word_offset_in_bytes), (intptr_t)c->as_jlong_bits()); 689 #else 690 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(), 691 lo_word_offset_in_bytes), c->as_jint_lo_bits()); 692 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(), 693 hi_word_offset_in_bytes), c->as_jint_hi_bits()); 694 #endif // _LP64 695 break; 696 697 default: 698 ShouldNotReachHere(); 699 } 700 } 701 702 void LIR_Assembler::const2mem(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info, bool wide) { 703 assert(src->is_constant(), "should not call otherwise"); 704 assert(dest->is_address(), "should not call otherwise"); 705 LIR_Const* c = src->as_constant_ptr(); 706 LIR_Address* addr = dest->as_address_ptr(); 707 708 int null_check_here = code_offset(); 709 switch (type) { 710 case T_INT: // fall through 711 case T_FLOAT: 712 __ movl(as_Address(addr), c->as_jint_bits()); 713 break; 714 715 case T_ADDRESS: 716 __ movptr(as_Address(addr), c->as_jint_bits()); 717 break; 718 719 case T_OBJECT: // fall through 720 case T_ARRAY: 721 if (c->as_jobject() == NULL) { 722 if (UseCompressedOops && !wide) { 723 __ movl(as_Address(addr), (int32_t)NULL_WORD); 724 } else { 725 #ifdef _LP64 726 __ xorptr(rscratch1, rscratch1); 727 null_check_here = code_offset(); 728 __ movptr(as_Address(addr), rscratch1); 729 #else 730 __ movptr(as_Address(addr), NULL_WORD); 731 #endif 732 } 733 } else { 734 if (is_literal_address(addr)) { 735 ShouldNotReachHere(); 736 __ movoop(as_Address(addr, noreg), c->as_jobject()); 737 } else { 738 #ifdef _LP64 739 __ movoop(rscratch1, c->as_jobject()); 740 if (UseCompressedOops && !wide) { 741 __ encode_heap_oop(rscratch1); 742 null_check_here = code_offset(); 743 __ movl(as_Address_lo(addr), rscratch1); 744 } else { 745 null_check_here = code_offset(); 746 __ movptr(as_Address_lo(addr), rscratch1); 747 } 748 #else 749 __ movoop(as_Address(addr), c->as_jobject()); 750 #endif 751 } 752 } 753 break; 754 755 case T_LONG: // fall through 756 case T_DOUBLE: 757 #ifdef _LP64 758 if (is_literal_address(addr)) { 759 ShouldNotReachHere(); 760 __ movptr(as_Address(addr, r15_thread), (intptr_t)c->as_jlong_bits()); 761 } else { 762 __ movptr(r10, (intptr_t)c->as_jlong_bits()); 763 null_check_here = code_offset(); 764 __ movptr(as_Address_lo(addr), r10); 765 } 766 #else 767 // Always reachable in 32bit so this doesn't produce useless move literal 768 __ movptr(as_Address_hi(addr), c->as_jint_hi_bits()); 769 __ movptr(as_Address_lo(addr), c->as_jint_lo_bits()); 770 #endif // _LP64 771 break; 772 773 case T_BOOLEAN: // fall through 774 case T_BYTE: 775 __ movb(as_Address(addr), c->as_jint() & 0xFF); 776 break; 777 778 case T_CHAR: // fall through 779 case T_SHORT: 780 __ movw(as_Address(addr), c->as_jint() & 0xFFFF); 781 break; 782 783 default: 784 ShouldNotReachHere(); 785 }; 786 787 if (info != NULL) { 788 add_debug_info_for_null_check(null_check_here, info); 789 } 790 } 791 792 793 void LIR_Assembler::reg2reg(LIR_Opr src, LIR_Opr dest) { 794 assert(src->is_register(), "should not call otherwise"); 795 assert(dest->is_register(), "should not call otherwise"); 796 797 // move between cpu-registers 798 if (dest->is_single_cpu()) { 799 #ifdef _LP64 800 if (src->type() == T_LONG) { 801 // Can do LONG -> OBJECT 802 move_regs(src->as_register_lo(), dest->as_register()); 803 return; 804 } 805 #endif 806 assert(src->is_single_cpu(), "must match"); 807 if (src->type() == T_OBJECT) { 808 __ verify_oop(src->as_register()); 809 } 810 move_regs(src->as_register(), dest->as_register()); 811 812 } else if (dest->is_double_cpu()) { 813 #ifdef _LP64 814 if (src->type() == T_OBJECT || src->type() == T_ARRAY) { 815 // Surprising to me but we can see move of a long to t_object 816 __ verify_oop(src->as_register()); 817 move_regs(src->as_register(), dest->as_register_lo()); 818 return; 819 } 820 #endif 821 assert(src->is_double_cpu(), "must match"); 822 Register f_lo = src->as_register_lo(); 823 Register f_hi = src->as_register_hi(); 824 Register t_lo = dest->as_register_lo(); 825 Register t_hi = dest->as_register_hi(); 826 #ifdef _LP64 827 assert(f_hi == f_lo, "must be same"); 828 assert(t_hi == t_lo, "must be same"); 829 move_regs(f_lo, t_lo); 830 #else 831 assert(f_lo != f_hi && t_lo != t_hi, "invalid register allocation"); 832 833 834 if (f_lo == t_hi && f_hi == t_lo) { 835 swap_reg(f_lo, f_hi); 836 } else if (f_hi == t_lo) { 837 assert(f_lo != t_hi, "overwriting register"); 838 move_regs(f_hi, t_hi); 839 move_regs(f_lo, t_lo); 840 } else { 841 assert(f_hi != t_lo, "overwriting register"); 842 move_regs(f_lo, t_lo); 843 move_regs(f_hi, t_hi); 844 } 845 #endif // LP64 846 847 // special moves from fpu-register to xmm-register 848 // necessary for method results 849 } else if (src->is_single_xmm() && !dest->is_single_xmm()) { 850 __ movflt(Address(rsp, 0), src->as_xmm_float_reg()); 851 __ fld_s(Address(rsp, 0)); 852 } else if (src->is_double_xmm() && !dest->is_double_xmm()) { 853 __ movdbl(Address(rsp, 0), src->as_xmm_double_reg()); 854 __ fld_d(Address(rsp, 0)); 855 } else if (dest->is_single_xmm() && !src->is_single_xmm()) { 856 __ fstp_s(Address(rsp, 0)); 857 __ movflt(dest->as_xmm_float_reg(), Address(rsp, 0)); 858 } else if (dest->is_double_xmm() && !src->is_double_xmm()) { 859 __ fstp_d(Address(rsp, 0)); 860 __ movdbl(dest->as_xmm_double_reg(), Address(rsp, 0)); 861 862 // move between xmm-registers 863 } else if (dest->is_single_xmm()) { 864 assert(src->is_single_xmm(), "must match"); 865 __ movflt(dest->as_xmm_float_reg(), src->as_xmm_float_reg()); 866 } else if (dest->is_double_xmm()) { 867 assert(src->is_double_xmm(), "must match"); 868 __ movdbl(dest->as_xmm_double_reg(), src->as_xmm_double_reg()); 869 870 // move between fpu-registers (no instruction necessary because of fpu-stack) 871 } else if (dest->is_single_fpu() || dest->is_double_fpu()) { 872 assert(src->is_single_fpu() || src->is_double_fpu(), "must match"); 873 assert(src->fpu() == dest->fpu(), "currently should be nothing to do"); 874 } else { 875 ShouldNotReachHere(); 876 } 877 } 878 879 void LIR_Assembler::reg2stack(LIR_Opr src, LIR_Opr dest, BasicType type, bool pop_fpu_stack) { 880 assert(src->is_register(), "should not call otherwise"); 881 assert(dest->is_stack(), "should not call otherwise"); 882 883 if (src->is_single_cpu()) { 884 Address dst = frame_map()->address_for_slot(dest->single_stack_ix()); 885 if (type == T_OBJECT || type == T_ARRAY) { 886 __ verify_oop(src->as_register()); 887 __ movptr (dst, src->as_register()); 888 } else if (type == T_METADATA) { 889 __ movptr (dst, src->as_register()); 890 } else { 891 __ movl (dst, src->as_register()); 892 } 893 894 } else if (src->is_double_cpu()) { 895 Address dstLO = frame_map()->address_for_slot(dest->double_stack_ix(), lo_word_offset_in_bytes); 896 Address dstHI = frame_map()->address_for_slot(dest->double_stack_ix(), hi_word_offset_in_bytes); 897 __ movptr (dstLO, src->as_register_lo()); 898 NOT_LP64(__ movptr (dstHI, src->as_register_hi())); 899 900 } else if (src->is_single_xmm()) { 901 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix()); 902 __ movflt(dst_addr, src->as_xmm_float_reg()); 903 904 } else if (src->is_double_xmm()) { 905 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix()); 906 __ movdbl(dst_addr, src->as_xmm_double_reg()); 907 908 } else if (src->is_single_fpu()) { 909 assert(src->fpu_regnr() == 0, "argument must be on TOS"); 910 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix()); 911 if (pop_fpu_stack) __ fstp_s (dst_addr); 912 else __ fst_s (dst_addr); 913 914 } else if (src->is_double_fpu()) { 915 assert(src->fpu_regnrLo() == 0, "argument must be on TOS"); 916 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix()); 917 if (pop_fpu_stack) __ fstp_d (dst_addr); 918 else __ fst_d (dst_addr); 919 920 } else { 921 ShouldNotReachHere(); 922 } 923 } 924 925 926 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 */) { 927 LIR_Address* to_addr = dest->as_address_ptr(); 928 PatchingStub* patch = NULL; 929 Register compressed_src = rscratch1; 930 931 if (type == T_ARRAY || type == T_OBJECT) { 932 __ verify_oop(src->as_register()); 933 #ifdef _LP64 934 if (UseCompressedOops && !wide) { 935 __ movptr(compressed_src, src->as_register()); 936 __ encode_heap_oop(compressed_src); 937 if (patch_code != lir_patch_none) { 938 info->oop_map()->set_narrowoop(compressed_src->as_VMReg()); 939 } 940 } 941 #endif 942 } 943 944 if (patch_code != lir_patch_none) { 945 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 946 Address toa = as_Address(to_addr); 947 assert(toa.disp() != 0, "must have"); 948 } 949 950 int null_check_here = code_offset(); 951 switch (type) { 952 case T_FLOAT: { 953 if (src->is_single_xmm()) { 954 __ movflt(as_Address(to_addr), src->as_xmm_float_reg()); 955 } else { 956 assert(src->is_single_fpu(), "must be"); 957 assert(src->fpu_regnr() == 0, "argument must be on TOS"); 958 if (pop_fpu_stack) __ fstp_s(as_Address(to_addr)); 959 else __ fst_s (as_Address(to_addr)); 960 } 961 break; 962 } 963 964 case T_DOUBLE: { 965 if (src->is_double_xmm()) { 966 __ movdbl(as_Address(to_addr), src->as_xmm_double_reg()); 967 } else { 968 assert(src->is_double_fpu(), "must be"); 969 assert(src->fpu_regnrLo() == 0, "argument must be on TOS"); 970 if (pop_fpu_stack) __ fstp_d(as_Address(to_addr)); 971 else __ fst_d (as_Address(to_addr)); 972 } 973 break; 974 } 975 976 case T_ARRAY: // fall through 977 case T_OBJECT: // fall through 978 if (UseCompressedOops && !wide) { 979 __ movl(as_Address(to_addr), compressed_src); 980 } else { 981 __ movptr(as_Address(to_addr), src->as_register()); 982 } 983 break; 984 case T_METADATA: 985 // We get here to store a method pointer to the stack to pass to 986 // a dtrace runtime call. This can't work on 64 bit with 987 // compressed klass ptrs: T_METADATA can be a compressed klass 988 // ptr or a 64 bit method pointer. 989 LP64_ONLY(ShouldNotReachHere()); 990 __ movptr(as_Address(to_addr), src->as_register()); 991 break; 992 case T_ADDRESS: 993 __ movptr(as_Address(to_addr), src->as_register()); 994 break; 995 case T_INT: 996 __ movl(as_Address(to_addr), src->as_register()); 997 break; 998 999 case T_LONG: { 1000 Register from_lo = src->as_register_lo(); 1001 Register from_hi = src->as_register_hi(); 1002 #ifdef _LP64 1003 __ movptr(as_Address_lo(to_addr), from_lo); 1004 #else 1005 Register base = to_addr->base()->as_register(); 1006 Register index = noreg; 1007 if (to_addr->index()->is_register()) { 1008 index = to_addr->index()->as_register(); 1009 } 1010 if (base == from_lo || index == from_lo) { 1011 assert(base != from_hi, "can't be"); 1012 assert(index == noreg || (index != base && index != from_hi), "can't handle this"); 1013 __ movl(as_Address_hi(to_addr), from_hi); 1014 if (patch != NULL) { 1015 patching_epilog(patch, lir_patch_high, base, info); 1016 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1017 patch_code = lir_patch_low; 1018 } 1019 __ movl(as_Address_lo(to_addr), from_lo); 1020 } else { 1021 assert(index == noreg || (index != base && index != from_lo), "can't handle this"); 1022 __ movl(as_Address_lo(to_addr), from_lo); 1023 if (patch != NULL) { 1024 patching_epilog(patch, lir_patch_low, base, info); 1025 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1026 patch_code = lir_patch_high; 1027 } 1028 __ movl(as_Address_hi(to_addr), from_hi); 1029 } 1030 #endif // _LP64 1031 break; 1032 } 1033 1034 case T_BYTE: // fall through 1035 case T_BOOLEAN: { 1036 Register src_reg = src->as_register(); 1037 Address dst_addr = as_Address(to_addr); 1038 assert(VM_Version::is_P6() || src_reg->has_byte_register(), "must use byte registers if not P6"); 1039 __ movb(dst_addr, src_reg); 1040 break; 1041 } 1042 1043 case T_CHAR: // fall through 1044 case T_SHORT: 1045 __ movw(as_Address(to_addr), src->as_register()); 1046 break; 1047 1048 default: 1049 ShouldNotReachHere(); 1050 } 1051 if (info != NULL) { 1052 add_debug_info_for_null_check(null_check_here, info); 1053 } 1054 1055 if (patch_code != lir_patch_none) { 1056 patching_epilog(patch, patch_code, to_addr->base()->as_register(), info); 1057 } 1058 } 1059 1060 1061 void LIR_Assembler::stack2reg(LIR_Opr src, LIR_Opr dest, BasicType type) { 1062 assert(src->is_stack(), "should not call otherwise"); 1063 assert(dest->is_register(), "should not call otherwise"); 1064 1065 if (dest->is_single_cpu()) { 1066 if (type == T_ARRAY || type == T_OBJECT) { 1067 __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix())); 1068 __ verify_oop(dest->as_register()); 1069 } else if (type == T_METADATA) { 1070 __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix())); 1071 } else { 1072 __ movl(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix())); 1073 } 1074 1075 } else if (dest->is_double_cpu()) { 1076 Address src_addr_LO = frame_map()->address_for_slot(src->double_stack_ix(), lo_word_offset_in_bytes); 1077 Address src_addr_HI = frame_map()->address_for_slot(src->double_stack_ix(), hi_word_offset_in_bytes); 1078 __ movptr(dest->as_register_lo(), src_addr_LO); 1079 NOT_LP64(__ movptr(dest->as_register_hi(), src_addr_HI)); 1080 1081 } else if (dest->is_single_xmm()) { 1082 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix()); 1083 __ movflt(dest->as_xmm_float_reg(), src_addr); 1084 1085 } else if (dest->is_double_xmm()) { 1086 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix()); 1087 __ movdbl(dest->as_xmm_double_reg(), src_addr); 1088 1089 } else if (dest->is_single_fpu()) { 1090 assert(dest->fpu_regnr() == 0, "dest must be TOS"); 1091 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix()); 1092 __ fld_s(src_addr); 1093 1094 } else if (dest->is_double_fpu()) { 1095 assert(dest->fpu_regnrLo() == 0, "dest must be TOS"); 1096 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix()); 1097 __ fld_d(src_addr); 1098 1099 } else { 1100 ShouldNotReachHere(); 1101 } 1102 } 1103 1104 1105 void LIR_Assembler::stack2stack(LIR_Opr src, LIR_Opr dest, BasicType type) { 1106 if (src->is_single_stack()) { 1107 if (type == T_OBJECT || type == T_ARRAY) { 1108 __ pushptr(frame_map()->address_for_slot(src ->single_stack_ix())); 1109 __ popptr (frame_map()->address_for_slot(dest->single_stack_ix())); 1110 } else { 1111 #ifndef _LP64 1112 __ pushl(frame_map()->address_for_slot(src ->single_stack_ix())); 1113 __ popl (frame_map()->address_for_slot(dest->single_stack_ix())); 1114 #else 1115 //no pushl on 64bits 1116 __ movl(rscratch1, frame_map()->address_for_slot(src ->single_stack_ix())); 1117 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), rscratch1); 1118 #endif 1119 } 1120 1121 } else if (src->is_double_stack()) { 1122 #ifdef _LP64 1123 __ pushptr(frame_map()->address_for_slot(src ->double_stack_ix())); 1124 __ popptr (frame_map()->address_for_slot(dest->double_stack_ix())); 1125 #else 1126 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 0)); 1127 // push and pop the part at src + wordSize, adding wordSize for the previous push 1128 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 2 * wordSize)); 1129 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 2 * wordSize)); 1130 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 0)); 1131 #endif // _LP64 1132 1133 } else { 1134 ShouldNotReachHere(); 1135 } 1136 } 1137 1138 1139 void LIR_Assembler::mem2reg(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool wide, bool /* unaligned */) { 1140 assert(src->is_address(), "should not call otherwise"); 1141 assert(dest->is_register(), "should not call otherwise"); 1142 1143 LIR_Address* addr = src->as_address_ptr(); 1144 Address from_addr = as_Address(addr); 1145 1146 if (addr->base()->type() == T_OBJECT) { 1147 __ verify_oop(addr->base()->as_pointer_register()); 1148 } 1149 1150 switch (type) { 1151 case T_BOOLEAN: // fall through 1152 case T_BYTE: // fall through 1153 case T_CHAR: // fall through 1154 case T_SHORT: 1155 if (!VM_Version::is_P6() && !from_addr.uses(dest->as_register())) { 1156 // on pre P6 processors we may get partial register stalls 1157 // so blow away the value of to_rinfo before loading a 1158 // partial word into it. Do it here so that it precedes 1159 // the potential patch point below. 1160 __ xorptr(dest->as_register(), dest->as_register()); 1161 } 1162 break; 1163 } 1164 1165 PatchingStub* patch = NULL; 1166 if (patch_code != lir_patch_none) { 1167 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1168 assert(from_addr.disp() != 0, "must have"); 1169 } 1170 if (info != NULL) { 1171 add_debug_info_for_null_check_here(info); 1172 } 1173 1174 switch (type) { 1175 case T_FLOAT: { 1176 if (dest->is_single_xmm()) { 1177 __ movflt(dest->as_xmm_float_reg(), from_addr); 1178 } else { 1179 assert(dest->is_single_fpu(), "must be"); 1180 assert(dest->fpu_regnr() == 0, "dest must be TOS"); 1181 __ fld_s(from_addr); 1182 } 1183 break; 1184 } 1185 1186 case T_DOUBLE: { 1187 if (dest->is_double_xmm()) { 1188 __ movdbl(dest->as_xmm_double_reg(), from_addr); 1189 } else { 1190 assert(dest->is_double_fpu(), "must be"); 1191 assert(dest->fpu_regnrLo() == 0, "dest must be TOS"); 1192 __ fld_d(from_addr); 1193 } 1194 break; 1195 } 1196 1197 case T_OBJECT: // fall through 1198 case T_ARRAY: // fall through 1199 if (UseCompressedOops && !wide) { 1200 __ movl(dest->as_register(), from_addr); 1201 } else { 1202 __ movptr(dest->as_register(), from_addr); 1203 } 1204 break; 1205 1206 case T_ADDRESS: 1207 if (UseCompressedClassPointers && addr->disp() == oopDesc::klass_offset_in_bytes()) { 1208 __ movl(dest->as_register(), from_addr); 1209 } else { 1210 __ movptr(dest->as_register(), from_addr); 1211 } 1212 break; 1213 case T_INT: 1214 __ movl(dest->as_register(), from_addr); 1215 break; 1216 1217 case T_LONG: { 1218 Register to_lo = dest->as_register_lo(); 1219 Register to_hi = dest->as_register_hi(); 1220 #ifdef _LP64 1221 __ movptr(to_lo, as_Address_lo(addr)); 1222 #else 1223 Register base = addr->base()->as_register(); 1224 Register index = noreg; 1225 if (addr->index()->is_register()) { 1226 index = addr->index()->as_register(); 1227 } 1228 if ((base == to_lo && index == to_hi) || 1229 (base == to_hi && index == to_lo)) { 1230 // addresses with 2 registers are only formed as a result of 1231 // array access so this code will never have to deal with 1232 // patches or null checks. 1233 assert(info == NULL && patch == NULL, "must be"); 1234 __ lea(to_hi, as_Address(addr)); 1235 __ movl(to_lo, Address(to_hi, 0)); 1236 __ movl(to_hi, Address(to_hi, BytesPerWord)); 1237 } else if (base == to_lo || index == to_lo) { 1238 assert(base != to_hi, "can't be"); 1239 assert(index == noreg || (index != base && index != to_hi), "can't handle this"); 1240 __ movl(to_hi, as_Address_hi(addr)); 1241 if (patch != NULL) { 1242 patching_epilog(patch, lir_patch_high, base, info); 1243 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1244 patch_code = lir_patch_low; 1245 } 1246 __ movl(to_lo, as_Address_lo(addr)); 1247 } else { 1248 assert(index == noreg || (index != base && index != to_lo), "can't handle this"); 1249 __ movl(to_lo, as_Address_lo(addr)); 1250 if (patch != NULL) { 1251 patching_epilog(patch, lir_patch_low, base, info); 1252 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1253 patch_code = lir_patch_high; 1254 } 1255 __ movl(to_hi, as_Address_hi(addr)); 1256 } 1257 #endif // _LP64 1258 break; 1259 } 1260 1261 case T_BOOLEAN: // fall through 1262 case T_BYTE: { 1263 Register dest_reg = dest->as_register(); 1264 assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6"); 1265 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) { 1266 __ movsbl(dest_reg, from_addr); 1267 } else { 1268 __ movb(dest_reg, from_addr); 1269 __ shll(dest_reg, 24); 1270 __ sarl(dest_reg, 24); 1271 } 1272 break; 1273 } 1274 1275 case T_CHAR: { 1276 Register dest_reg = dest->as_register(); 1277 assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6"); 1278 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) { 1279 __ movzwl(dest_reg, from_addr); 1280 } else { 1281 __ movw(dest_reg, from_addr); 1282 } 1283 break; 1284 } 1285 1286 case T_SHORT: { 1287 Register dest_reg = dest->as_register(); 1288 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) { 1289 __ movswl(dest_reg, from_addr); 1290 } else { 1291 __ movw(dest_reg, from_addr); 1292 __ shll(dest_reg, 16); 1293 __ sarl(dest_reg, 16); 1294 } 1295 break; 1296 } 1297 1298 default: 1299 ShouldNotReachHere(); 1300 } 1301 1302 if (patch != NULL) { 1303 patching_epilog(patch, patch_code, addr->base()->as_register(), info); 1304 } 1305 1306 if (type == T_ARRAY || type == T_OBJECT) { 1307 #ifdef _LP64 1308 if (UseCompressedOops && !wide) { 1309 __ decode_heap_oop(dest->as_register()); 1310 } 1311 #endif 1312 __ verify_oop(dest->as_register()); 1313 } else if (type == T_ADDRESS && addr->disp() == oopDesc::klass_offset_in_bytes()) { 1314 #ifdef _LP64 1315 if (UseCompressedClassPointers) { 1316 __ decode_klass_not_null(dest->as_register()); 1317 } 1318 #endif 1319 } 1320 } 1321 1322 1323 NEEDS_CLEANUP; // This could be static? 1324 Address::ScaleFactor LIR_Assembler::array_element_size(BasicType type) const { 1325 int elem_size = type2aelembytes(type); 1326 switch (elem_size) { 1327 case 1: return Address::times_1; 1328 case 2: return Address::times_2; 1329 case 4: return Address::times_4; 1330 case 8: return Address::times_8; 1331 } 1332 ShouldNotReachHere(); 1333 return Address::no_scale; 1334 } 1335 1336 1337 void LIR_Assembler::emit_op3(LIR_Op3* op) { 1338 switch (op->code()) { 1339 case lir_idiv: 1340 case lir_irem: 1341 arithmetic_idiv(op->code(), 1342 op->in_opr1(), 1343 op->in_opr2(), 1344 op->in_opr3(), 1345 op->result_opr(), 1346 op->info()); 1347 break; 1348 default: ShouldNotReachHere(); break; 1349 } 1350 } 1351 1352 void LIR_Assembler::emit_opBranch(LIR_OpBranch* op) { 1353 #ifdef ASSERT 1354 assert(op->block() == NULL || op->block()->label() == op->label(), "wrong label"); 1355 if (op->block() != NULL) _branch_target_blocks.append(op->block()); 1356 if (op->ublock() != NULL) _branch_target_blocks.append(op->ublock()); 1357 #endif 1358 1359 if (op->cond() == lir_cond_always) { 1360 if (op->info() != NULL) add_debug_info_for_branch(op->info()); 1361 __ jmp (*(op->label())); 1362 } else { 1363 Assembler::Condition acond = Assembler::zero; 1364 if (op->code() == lir_cond_float_branch) { 1365 assert(op->ublock() != NULL, "must have unordered successor"); 1366 __ jcc(Assembler::parity, *(op->ublock()->label())); 1367 switch(op->cond()) { 1368 case lir_cond_equal: acond = Assembler::equal; break; 1369 case lir_cond_notEqual: acond = Assembler::notEqual; break; 1370 case lir_cond_less: acond = Assembler::below; break; 1371 case lir_cond_lessEqual: acond = Assembler::belowEqual; break; 1372 case lir_cond_greaterEqual: acond = Assembler::aboveEqual; break; 1373 case lir_cond_greater: acond = Assembler::above; break; 1374 default: ShouldNotReachHere(); 1375 } 1376 } else { 1377 switch (op->cond()) { 1378 case lir_cond_equal: acond = Assembler::equal; break; 1379 case lir_cond_notEqual: acond = Assembler::notEqual; break; 1380 case lir_cond_less: acond = Assembler::less; break; 1381 case lir_cond_lessEqual: acond = Assembler::lessEqual; break; 1382 case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break; 1383 case lir_cond_greater: acond = Assembler::greater; break; 1384 case lir_cond_belowEqual: acond = Assembler::belowEqual; break; 1385 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; break; 1386 default: ShouldNotReachHere(); 1387 } 1388 } 1389 __ jcc(acond,*(op->label())); 1390 } 1391 } 1392 1393 void LIR_Assembler::emit_opConvert(LIR_OpConvert* op) { 1394 LIR_Opr src = op->in_opr(); 1395 LIR_Opr dest = op->result_opr(); 1396 1397 switch (op->bytecode()) { 1398 case Bytecodes::_i2l: 1399 #ifdef _LP64 1400 __ movl2ptr(dest->as_register_lo(), src->as_register()); 1401 #else 1402 move_regs(src->as_register(), dest->as_register_lo()); 1403 move_regs(src->as_register(), dest->as_register_hi()); 1404 __ sarl(dest->as_register_hi(), 31); 1405 #endif // LP64 1406 break; 1407 1408 case Bytecodes::_l2i: 1409 #ifdef _LP64 1410 __ movl(dest->as_register(), src->as_register_lo()); 1411 #else 1412 move_regs(src->as_register_lo(), dest->as_register()); 1413 #endif 1414 break; 1415 1416 case Bytecodes::_i2b: 1417 move_regs(src->as_register(), dest->as_register()); 1418 __ sign_extend_byte(dest->as_register()); 1419 break; 1420 1421 case Bytecodes::_i2c: 1422 move_regs(src->as_register(), dest->as_register()); 1423 __ andl(dest->as_register(), 0xFFFF); 1424 break; 1425 1426 case Bytecodes::_i2s: 1427 move_regs(src->as_register(), dest->as_register()); 1428 __ sign_extend_short(dest->as_register()); 1429 break; 1430 1431 1432 case Bytecodes::_f2d: 1433 case Bytecodes::_d2f: 1434 if (dest->is_single_xmm()) { 1435 __ cvtsd2ss(dest->as_xmm_float_reg(), src->as_xmm_double_reg()); 1436 } else if (dest->is_double_xmm()) { 1437 __ cvtss2sd(dest->as_xmm_double_reg(), src->as_xmm_float_reg()); 1438 } else { 1439 assert(src->fpu() == dest->fpu(), "register must be equal"); 1440 // do nothing (float result is rounded later through spilling) 1441 } 1442 break; 1443 1444 case Bytecodes::_i2f: 1445 case Bytecodes::_i2d: 1446 if (dest->is_single_xmm()) { 1447 __ cvtsi2ssl(dest->as_xmm_float_reg(), src->as_register()); 1448 } else if (dest->is_double_xmm()) { 1449 __ cvtsi2sdl(dest->as_xmm_double_reg(), src->as_register()); 1450 } else { 1451 assert(dest->fpu() == 0, "result must be on TOS"); 1452 __ movl(Address(rsp, 0), src->as_register()); 1453 __ fild_s(Address(rsp, 0)); 1454 } 1455 break; 1456 1457 case Bytecodes::_f2i: 1458 case Bytecodes::_d2i: 1459 if (src->is_single_xmm()) { 1460 __ cvttss2sil(dest->as_register(), src->as_xmm_float_reg()); 1461 } else if (src->is_double_xmm()) { 1462 __ cvttsd2sil(dest->as_register(), src->as_xmm_double_reg()); 1463 } else { 1464 assert(src->fpu() == 0, "input must be on TOS"); 1465 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_trunc())); 1466 __ fist_s(Address(rsp, 0)); 1467 __ movl(dest->as_register(), Address(rsp, 0)); 1468 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); 1469 } 1470 1471 // IA32 conversion instructions do not match JLS for overflow, underflow and NaN -> fixup in stub 1472 assert(op->stub() != NULL, "stub required"); 1473 __ cmpl(dest->as_register(), 0x80000000); 1474 __ jcc(Assembler::equal, *op->stub()->entry()); 1475 __ bind(*op->stub()->continuation()); 1476 break; 1477 1478 case Bytecodes::_l2f: 1479 case Bytecodes::_l2d: 1480 assert(!dest->is_xmm_register(), "result in xmm register not supported (no SSE instruction present)"); 1481 assert(dest->fpu() == 0, "result must be on TOS"); 1482 1483 __ movptr(Address(rsp, 0), src->as_register_lo()); 1484 NOT_LP64(__ movl(Address(rsp, BytesPerWord), src->as_register_hi())); 1485 __ fild_d(Address(rsp, 0)); 1486 // float result is rounded later through spilling 1487 break; 1488 1489 case Bytecodes::_f2l: 1490 case Bytecodes::_d2l: 1491 assert(!src->is_xmm_register(), "input in xmm register not supported (no SSE instruction present)"); 1492 assert(src->fpu() == 0, "input must be on TOS"); 1493 assert(dest == FrameMap::long0_opr, "runtime stub places result in these registers"); 1494 1495 // instruction sequence too long to inline it here 1496 { 1497 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::fpu2long_stub_id))); 1498 } 1499 break; 1500 1501 default: ShouldNotReachHere(); 1502 } 1503 } 1504 1505 void LIR_Assembler::emit_alloc_obj(LIR_OpAllocObj* op) { 1506 if (op->init_check()) { 1507 __ cmpb(Address(op->klass()->as_register(), 1508 InstanceKlass::init_state_offset()), 1509 InstanceKlass::fully_initialized); 1510 add_debug_info_for_null_check_here(op->stub()->info()); 1511 __ jcc(Assembler::notEqual, *op->stub()->entry()); 1512 } 1513 __ allocate_object(op->obj()->as_register(), 1514 op->tmp1()->as_register(), 1515 op->tmp2()->as_register(), 1516 op->header_size(), 1517 op->object_size(), 1518 op->klass()->as_register(), 1519 *op->stub()->entry()); 1520 __ bind(*op->stub()->continuation()); 1521 } 1522 1523 void LIR_Assembler::emit_alloc_array(LIR_OpAllocArray* op) { 1524 Register len = op->len()->as_register(); 1525 LP64_ONLY( __ movslq(len, len); ) 1526 1527 if (UseSlowPath || 1528 (!UseFastNewObjectArray && (op->type() == T_OBJECT || op->type() == T_ARRAY)) || 1529 (!UseFastNewTypeArray && (op->type() != T_OBJECT && op->type() != T_ARRAY))) { 1530 __ jmp(*op->stub()->entry()); 1531 } else { 1532 Register tmp1 = op->tmp1()->as_register(); 1533 Register tmp2 = op->tmp2()->as_register(); 1534 Register tmp3 = op->tmp3()->as_register(); 1535 if (len == tmp1) { 1536 tmp1 = tmp3; 1537 } else if (len == tmp2) { 1538 tmp2 = tmp3; 1539 } else if (len == tmp3) { 1540 // everything is ok 1541 } else { 1542 __ mov(tmp3, len); 1543 } 1544 __ allocate_array(op->obj()->as_register(), 1545 len, 1546 tmp1, 1547 tmp2, 1548 arrayOopDesc::header_size(op->type()), 1549 array_element_size(op->type()), 1550 op->klass()->as_register(), 1551 *op->stub()->entry()); 1552 } 1553 __ bind(*op->stub()->continuation()); 1554 } 1555 1556 void LIR_Assembler::type_profile_helper(Register mdo, 1557 ciMethodData *md, ciProfileData *data, 1558 Register recv, Label* update_done) { 1559 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) { 1560 Label next_test; 1561 // See if the receiver is receiver[n]. 1562 __ cmpptr(recv, Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i)))); 1563 __ jccb(Assembler::notEqual, next_test); 1564 Address data_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i))); 1565 __ addptr(data_addr, DataLayout::counter_increment); 1566 __ jmp(*update_done); 1567 __ bind(next_test); 1568 } 1569 1570 // Didn't find receiver; find next empty slot and fill it in 1571 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) { 1572 Label next_test; 1573 Address recv_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i))); 1574 __ cmpptr(recv_addr, (intptr_t)NULL_WORD); 1575 __ jccb(Assembler::notEqual, next_test); 1576 __ movptr(recv_addr, recv); 1577 __ movptr(Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i))), DataLayout::counter_increment); 1578 __ jmp(*update_done); 1579 __ bind(next_test); 1580 } 1581 } 1582 1583 void LIR_Assembler::emit_typecheck_helper(LIR_OpTypeCheck *op, Label* success, Label* failure, Label* obj_is_null) { 1584 // we always need a stub for the failure case. 1585 CodeStub* stub = op->stub(); 1586 Register obj = op->object()->as_register(); 1587 Register k_RInfo = op->tmp1()->as_register(); 1588 Register klass_RInfo = op->tmp2()->as_register(); 1589 Register dst = op->result_opr()->as_register(); 1590 ciKlass* k = op->klass(); 1591 Register Rtmp1 = noreg; 1592 1593 // check if it needs to be profiled 1594 ciMethodData* md = NULL; 1595 ciProfileData* data = NULL; 1596 1597 if (op->should_profile()) { 1598 ciMethod* method = op->profiled_method(); 1599 assert(method != NULL, "Should have method"); 1600 int bci = op->profiled_bci(); 1601 md = method->method_data_or_null(); 1602 assert(md != NULL, "Sanity"); 1603 data = md->bci_to_data(bci); 1604 assert(data != NULL, "need data for type check"); 1605 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check"); 1606 } 1607 Label profile_cast_success, profile_cast_failure; 1608 Label *success_target = op->should_profile() ? &profile_cast_success : success; 1609 Label *failure_target = op->should_profile() ? &profile_cast_failure : failure; 1610 1611 if (obj == k_RInfo) { 1612 k_RInfo = dst; 1613 } else if (obj == klass_RInfo) { 1614 klass_RInfo = dst; 1615 } 1616 if (k->is_loaded() && !UseCompressedClassPointers) { 1617 select_different_registers(obj, dst, k_RInfo, klass_RInfo); 1618 } else { 1619 Rtmp1 = op->tmp3()->as_register(); 1620 select_different_registers(obj, dst, k_RInfo, klass_RInfo, Rtmp1); 1621 } 1622 1623 assert_different_registers(obj, k_RInfo, klass_RInfo); 1624 1625 __ cmpptr(obj, (int32_t)NULL_WORD); 1626 if (op->should_profile()) { 1627 Label not_null; 1628 __ jccb(Assembler::notEqual, not_null); 1629 // Object is null; update MDO and exit 1630 Register mdo = klass_RInfo; 1631 __ mov_metadata(mdo, md->constant_encoding()); 1632 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::header_offset())); 1633 int header_bits = DataLayout::flag_mask_to_header_mask(BitData::null_seen_byte_constant()); 1634 __ orl(data_addr, header_bits); 1635 __ jmp(*obj_is_null); 1636 __ bind(not_null); 1637 } else { 1638 __ jcc(Assembler::equal, *obj_is_null); 1639 } 1640 1641 if (!k->is_loaded()) { 1642 klass2reg_with_patching(k_RInfo, op->info_for_patch()); 1643 } else { 1644 #ifdef _LP64 1645 __ mov_metadata(k_RInfo, k->constant_encoding()); 1646 #endif // _LP64 1647 } 1648 __ verify_oop(obj); 1649 1650 if (op->fast_check()) { 1651 // get object class 1652 // not a safepoint as obj null check happens earlier 1653 #ifdef _LP64 1654 if (UseCompressedClassPointers) { 1655 __ load_klass(Rtmp1, obj); 1656 __ cmpptr(k_RInfo, Rtmp1); 1657 } else { 1658 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes())); 1659 } 1660 #else 1661 if (k->is_loaded()) { 1662 __ cmpklass(Address(obj, oopDesc::klass_offset_in_bytes()), k->constant_encoding()); 1663 } else { 1664 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes())); 1665 } 1666 #endif 1667 __ jcc(Assembler::notEqual, *failure_target); 1668 // successful cast, fall through to profile or jump 1669 } else { 1670 // get object class 1671 // not a safepoint as obj null check happens earlier 1672 __ load_klass(klass_RInfo, obj); 1673 if (k->is_loaded()) { 1674 // See if we get an immediate positive hit 1675 #ifdef _LP64 1676 __ cmpptr(k_RInfo, Address(klass_RInfo, k->super_check_offset())); 1677 #else 1678 __ cmpklass(Address(klass_RInfo, k->super_check_offset()), k->constant_encoding()); 1679 #endif // _LP64 1680 if ((juint)in_bytes(Klass::secondary_super_cache_offset()) != k->super_check_offset()) { 1681 __ jcc(Assembler::notEqual, *failure_target); 1682 // successful cast, fall through to profile or jump 1683 } else { 1684 // See if we get an immediate positive hit 1685 __ jcc(Assembler::equal, *success_target); 1686 // check for self 1687 #ifdef _LP64 1688 __ cmpptr(klass_RInfo, k_RInfo); 1689 #else 1690 __ cmpklass(klass_RInfo, k->constant_encoding()); 1691 #endif // _LP64 1692 __ jcc(Assembler::equal, *success_target); 1693 1694 __ push(klass_RInfo); 1695 #ifdef _LP64 1696 __ push(k_RInfo); 1697 #else 1698 __ pushklass(k->constant_encoding()); 1699 #endif // _LP64 1700 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 1701 __ pop(klass_RInfo); 1702 __ pop(klass_RInfo); 1703 // result is a boolean 1704 __ cmpl(klass_RInfo, 0); 1705 __ jcc(Assembler::equal, *failure_target); 1706 // successful cast, fall through to profile or jump 1707 } 1708 } else { 1709 // perform the fast part of the checking logic 1710 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL); 1711 // call out-of-line instance of __ check_klass_subtype_slow_path(...): 1712 __ push(klass_RInfo); 1713 __ push(k_RInfo); 1714 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 1715 __ pop(klass_RInfo); 1716 __ pop(k_RInfo); 1717 // result is a boolean 1718 __ cmpl(k_RInfo, 0); 1719 __ jcc(Assembler::equal, *failure_target); 1720 // successful cast, fall through to profile or jump 1721 } 1722 } 1723 if (op->should_profile()) { 1724 Register mdo = klass_RInfo, recv = k_RInfo; 1725 __ bind(profile_cast_success); 1726 __ mov_metadata(mdo, md->constant_encoding()); 1727 __ load_klass(recv, obj); 1728 Label update_done; 1729 type_profile_helper(mdo, md, data, recv, success); 1730 __ jmp(*success); 1731 1732 __ bind(profile_cast_failure); 1733 __ mov_metadata(mdo, md->constant_encoding()); 1734 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset())); 1735 __ subptr(counter_addr, DataLayout::counter_increment); 1736 __ jmp(*failure); 1737 } 1738 __ jmp(*success); 1739 } 1740 1741 1742 void LIR_Assembler::emit_opTypeCheck(LIR_OpTypeCheck* op) { 1743 LIR_Code code = op->code(); 1744 if (code == lir_store_check) { 1745 Register value = op->object()->as_register(); 1746 Register array = op->array()->as_register(); 1747 Register k_RInfo = op->tmp1()->as_register(); 1748 Register klass_RInfo = op->tmp2()->as_register(); 1749 Register Rtmp1 = op->tmp3()->as_register(); 1750 1751 CodeStub* stub = op->stub(); 1752 1753 // check if it needs to be profiled 1754 ciMethodData* md = NULL; 1755 ciProfileData* data = NULL; 1756 1757 if (op->should_profile()) { 1758 ciMethod* method = op->profiled_method(); 1759 assert(method != NULL, "Should have method"); 1760 int bci = op->profiled_bci(); 1761 md = method->method_data_or_null(); 1762 assert(md != NULL, "Sanity"); 1763 data = md->bci_to_data(bci); 1764 assert(data != NULL, "need data for type check"); 1765 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check"); 1766 } 1767 Label profile_cast_success, profile_cast_failure, done; 1768 Label *success_target = op->should_profile() ? &profile_cast_success : &done; 1769 Label *failure_target = op->should_profile() ? &profile_cast_failure : stub->entry(); 1770 1771 __ cmpptr(value, (int32_t)NULL_WORD); 1772 if (op->should_profile()) { 1773 Label not_null; 1774 __ jccb(Assembler::notEqual, not_null); 1775 // Object is null; update MDO and exit 1776 Register mdo = klass_RInfo; 1777 __ mov_metadata(mdo, md->constant_encoding()); 1778 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::header_offset())); 1779 int header_bits = DataLayout::flag_mask_to_header_mask(BitData::null_seen_byte_constant()); 1780 __ orl(data_addr, header_bits); 1781 __ jmp(done); 1782 __ bind(not_null); 1783 } else { 1784 __ jcc(Assembler::equal, done); 1785 } 1786 1787 add_debug_info_for_null_check_here(op->info_for_exception()); 1788 __ load_klass(k_RInfo, array); 1789 __ load_klass(klass_RInfo, value); 1790 1791 // get instance klass (it's already uncompressed) 1792 __ movptr(k_RInfo, Address(k_RInfo, ObjArrayKlass::element_klass_offset())); 1793 // perform the fast part of the checking logic 1794 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL); 1795 // call out-of-line instance of __ check_klass_subtype_slow_path(...): 1796 __ push(klass_RInfo); 1797 __ push(k_RInfo); 1798 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 1799 __ pop(klass_RInfo); 1800 __ pop(k_RInfo); 1801 // result is a boolean 1802 __ cmpl(k_RInfo, 0); 1803 __ jcc(Assembler::equal, *failure_target); 1804 // fall through to the success case 1805 1806 if (op->should_profile()) { 1807 Register mdo = klass_RInfo, recv = k_RInfo; 1808 __ bind(profile_cast_success); 1809 __ mov_metadata(mdo, md->constant_encoding()); 1810 __ load_klass(recv, value); 1811 Label update_done; 1812 type_profile_helper(mdo, md, data, recv, &done); 1813 __ jmpb(done); 1814 1815 __ bind(profile_cast_failure); 1816 __ mov_metadata(mdo, md->constant_encoding()); 1817 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset())); 1818 __ subptr(counter_addr, DataLayout::counter_increment); 1819 __ jmp(*stub->entry()); 1820 } 1821 1822 __ bind(done); 1823 } else 1824 if (code == lir_checkcast) { 1825 Register obj = op->object()->as_register(); 1826 Register dst = op->result_opr()->as_register(); 1827 Label success; 1828 emit_typecheck_helper(op, &success, op->stub()->entry(), &success); 1829 __ bind(success); 1830 if (dst != obj) { 1831 __ mov(dst, obj); 1832 } 1833 } else 1834 if (code == lir_instanceof) { 1835 Register obj = op->object()->as_register(); 1836 Register dst = op->result_opr()->as_register(); 1837 Label success, failure, done; 1838 emit_typecheck_helper(op, &success, &failure, &failure); 1839 __ bind(failure); 1840 __ xorptr(dst, dst); 1841 __ jmpb(done); 1842 __ bind(success); 1843 __ movptr(dst, 1); 1844 __ bind(done); 1845 } else { 1846 ShouldNotReachHere(); 1847 } 1848 1849 } 1850 1851 1852 void LIR_Assembler::emit_compare_and_swap(LIR_OpCompareAndSwap* op) { 1853 if (LP64_ONLY(false &&) op->code() == lir_cas_long && VM_Version::supports_cx8()) { 1854 assert(op->cmp_value()->as_register_lo() == rax, "wrong register"); 1855 assert(op->cmp_value()->as_register_hi() == rdx, "wrong register"); 1856 assert(op->new_value()->as_register_lo() == rbx, "wrong register"); 1857 assert(op->new_value()->as_register_hi() == rcx, "wrong register"); 1858 Register addr = op->addr()->as_register(); 1859 if (os::is_MP()) { 1860 __ lock(); 1861 } 1862 NOT_LP64(__ cmpxchg8(Address(addr, 0))); 1863 1864 } else if (op->code() == lir_cas_int || op->code() == lir_cas_obj ) { 1865 NOT_LP64(assert(op->addr()->is_single_cpu(), "must be single");) 1866 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo()); 1867 Register newval = op->new_value()->as_register(); 1868 Register cmpval = op->cmp_value()->as_register(); 1869 assert(cmpval == rax, "wrong register"); 1870 assert(newval != NULL, "new val must be register"); 1871 assert(cmpval != newval, "cmp and new values must be in different registers"); 1872 assert(cmpval != addr, "cmp and addr must be in different registers"); 1873 assert(newval != addr, "new value and addr must be in different registers"); 1874 1875 if ( op->code() == lir_cas_obj) { 1876 #ifdef _LP64 1877 if (UseCompressedOops) { 1878 __ encode_heap_oop(cmpval); 1879 __ mov(rscratch1, newval); 1880 __ encode_heap_oop(rscratch1); 1881 if (os::is_MP()) { 1882 __ lock(); 1883 } 1884 // cmpval (rax) is implicitly used by this instruction 1885 __ cmpxchgl(rscratch1, Address(addr, 0)); 1886 } else 1887 #endif 1888 { 1889 if (os::is_MP()) { 1890 __ lock(); 1891 } 1892 __ cmpxchgptr(newval, Address(addr, 0)); 1893 } 1894 } else { 1895 assert(op->code() == lir_cas_int, "lir_cas_int expected"); 1896 if (os::is_MP()) { 1897 __ lock(); 1898 } 1899 __ cmpxchgl(newval, Address(addr, 0)); 1900 } 1901 #ifdef _LP64 1902 } else if (op->code() == lir_cas_long) { 1903 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo()); 1904 Register newval = op->new_value()->as_register_lo(); 1905 Register cmpval = op->cmp_value()->as_register_lo(); 1906 assert(cmpval == rax, "wrong register"); 1907 assert(newval != NULL, "new val must be register"); 1908 assert(cmpval != newval, "cmp and new values must be in different registers"); 1909 assert(cmpval != addr, "cmp and addr must be in different registers"); 1910 assert(newval != addr, "new value and addr must be in different registers"); 1911 if (os::is_MP()) { 1912 __ lock(); 1913 } 1914 __ cmpxchgq(newval, Address(addr, 0)); 1915 #endif // _LP64 1916 } else { 1917 Unimplemented(); 1918 } 1919 } 1920 1921 void LIR_Assembler::cmove(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result, BasicType type) { 1922 Assembler::Condition acond, ncond; 1923 switch (condition) { 1924 case lir_cond_equal: acond = Assembler::equal; ncond = Assembler::notEqual; break; 1925 case lir_cond_notEqual: acond = Assembler::notEqual; ncond = Assembler::equal; break; 1926 case lir_cond_less: acond = Assembler::less; ncond = Assembler::greaterEqual; break; 1927 case lir_cond_lessEqual: acond = Assembler::lessEqual; ncond = Assembler::greater; break; 1928 case lir_cond_greaterEqual: acond = Assembler::greaterEqual; ncond = Assembler::less; break; 1929 case lir_cond_greater: acond = Assembler::greater; ncond = Assembler::lessEqual; break; 1930 case lir_cond_belowEqual: acond = Assembler::belowEqual; ncond = Assembler::above; break; 1931 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; ncond = Assembler::below; break; 1932 default: acond = Assembler::equal; ncond = Assembler::notEqual; 1933 ShouldNotReachHere(); 1934 } 1935 1936 if (opr1->is_cpu_register()) { 1937 reg2reg(opr1, result); 1938 } else if (opr1->is_stack()) { 1939 stack2reg(opr1, result, result->type()); 1940 } else if (opr1->is_constant()) { 1941 const2reg(opr1, result, lir_patch_none, NULL); 1942 } else { 1943 ShouldNotReachHere(); 1944 } 1945 1946 if (VM_Version::supports_cmov() && !opr2->is_constant()) { 1947 // optimized version that does not require a branch 1948 if (opr2->is_single_cpu()) { 1949 assert(opr2->cpu_regnr() != result->cpu_regnr(), "opr2 already overwritten by previous move"); 1950 __ cmov(ncond, result->as_register(), opr2->as_register()); 1951 } else if (opr2->is_double_cpu()) { 1952 assert(opr2->cpu_regnrLo() != result->cpu_regnrLo() && opr2->cpu_regnrLo() != result->cpu_regnrHi(), "opr2 already overwritten by previous move"); 1953 assert(opr2->cpu_regnrHi() != result->cpu_regnrLo() && opr2->cpu_regnrHi() != result->cpu_regnrHi(), "opr2 already overwritten by previous move"); 1954 __ cmovptr(ncond, result->as_register_lo(), opr2->as_register_lo()); 1955 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), opr2->as_register_hi());) 1956 } else if (opr2->is_single_stack()) { 1957 __ cmovl(ncond, result->as_register(), frame_map()->address_for_slot(opr2->single_stack_ix())); 1958 } else if (opr2->is_double_stack()) { 1959 __ cmovptr(ncond, result->as_register_lo(), frame_map()->address_for_slot(opr2->double_stack_ix(), lo_word_offset_in_bytes)); 1960 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), frame_map()->address_for_slot(opr2->double_stack_ix(), hi_word_offset_in_bytes));) 1961 } else { 1962 ShouldNotReachHere(); 1963 } 1964 1965 } else { 1966 Label skip; 1967 __ jcc (acond, skip); 1968 if (opr2->is_cpu_register()) { 1969 reg2reg(opr2, result); 1970 } else if (opr2->is_stack()) { 1971 stack2reg(opr2, result, result->type()); 1972 } else if (opr2->is_constant()) { 1973 const2reg(opr2, result, lir_patch_none, NULL); 1974 } else { 1975 ShouldNotReachHere(); 1976 } 1977 __ bind(skip); 1978 } 1979 } 1980 1981 1982 void LIR_Assembler::arith_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dest, CodeEmitInfo* info, bool pop_fpu_stack) { 1983 assert(info == NULL, "should never be used, idiv/irem and ldiv/lrem not handled by this method"); 1984 1985 if (left->is_single_cpu()) { 1986 assert(left == dest, "left and dest must be equal"); 1987 Register lreg = left->as_register(); 1988 1989 if (right->is_single_cpu()) { 1990 // cpu register - cpu register 1991 Register rreg = right->as_register(); 1992 switch (code) { 1993 case lir_add: __ addl (lreg, rreg); break; 1994 case lir_sub: __ subl (lreg, rreg); break; 1995 case lir_mul: __ imull(lreg, rreg); break; 1996 default: ShouldNotReachHere(); 1997 } 1998 1999 } else if (right->is_stack()) { 2000 // cpu register - stack 2001 Address raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2002 switch (code) { 2003 case lir_add: __ addl(lreg, raddr); break; 2004 case lir_sub: __ subl(lreg, raddr); break; 2005 default: ShouldNotReachHere(); 2006 } 2007 2008 } else if (right->is_constant()) { 2009 // cpu register - constant 2010 jint c = right->as_constant_ptr()->as_jint(); 2011 switch (code) { 2012 case lir_add: { 2013 __ incrementl(lreg, c); 2014 break; 2015 } 2016 case lir_sub: { 2017 __ decrementl(lreg, c); 2018 break; 2019 } 2020 default: ShouldNotReachHere(); 2021 } 2022 2023 } else { 2024 ShouldNotReachHere(); 2025 } 2026 2027 } else if (left->is_double_cpu()) { 2028 assert(left == dest, "left and dest must be equal"); 2029 Register lreg_lo = left->as_register_lo(); 2030 Register lreg_hi = left->as_register_hi(); 2031 2032 if (right->is_double_cpu()) { 2033 // cpu register - cpu register 2034 Register rreg_lo = right->as_register_lo(); 2035 Register rreg_hi = right->as_register_hi(); 2036 NOT_LP64(assert_different_registers(lreg_lo, lreg_hi, rreg_lo, rreg_hi)); 2037 LP64_ONLY(assert_different_registers(lreg_lo, rreg_lo)); 2038 switch (code) { 2039 case lir_add: 2040 __ addptr(lreg_lo, rreg_lo); 2041 NOT_LP64(__ adcl(lreg_hi, rreg_hi)); 2042 break; 2043 case lir_sub: 2044 __ subptr(lreg_lo, rreg_lo); 2045 NOT_LP64(__ sbbl(lreg_hi, rreg_hi)); 2046 break; 2047 case lir_mul: 2048 #ifdef _LP64 2049 __ imulq(lreg_lo, rreg_lo); 2050 #else 2051 assert(lreg_lo == rax && lreg_hi == rdx, "must be"); 2052 __ imull(lreg_hi, rreg_lo); 2053 __ imull(rreg_hi, lreg_lo); 2054 __ addl (rreg_hi, lreg_hi); 2055 __ mull (rreg_lo); 2056 __ addl (lreg_hi, rreg_hi); 2057 #endif // _LP64 2058 break; 2059 default: 2060 ShouldNotReachHere(); 2061 } 2062 2063 } else if (right->is_constant()) { 2064 // cpu register - constant 2065 #ifdef _LP64 2066 jlong c = right->as_constant_ptr()->as_jlong_bits(); 2067 __ movptr(r10, (intptr_t) c); 2068 switch (code) { 2069 case lir_add: 2070 __ addptr(lreg_lo, r10); 2071 break; 2072 case lir_sub: 2073 __ subptr(lreg_lo, r10); 2074 break; 2075 default: 2076 ShouldNotReachHere(); 2077 } 2078 #else 2079 jint c_lo = right->as_constant_ptr()->as_jint_lo(); 2080 jint c_hi = right->as_constant_ptr()->as_jint_hi(); 2081 switch (code) { 2082 case lir_add: 2083 __ addptr(lreg_lo, c_lo); 2084 __ adcl(lreg_hi, c_hi); 2085 break; 2086 case lir_sub: 2087 __ subptr(lreg_lo, c_lo); 2088 __ sbbl(lreg_hi, c_hi); 2089 break; 2090 default: 2091 ShouldNotReachHere(); 2092 } 2093 #endif // _LP64 2094 2095 } else { 2096 ShouldNotReachHere(); 2097 } 2098 2099 } else if (left->is_single_xmm()) { 2100 assert(left == dest, "left and dest must be equal"); 2101 XMMRegister lreg = left->as_xmm_float_reg(); 2102 2103 if (right->is_single_xmm()) { 2104 XMMRegister rreg = right->as_xmm_float_reg(); 2105 switch (code) { 2106 case lir_add: __ addss(lreg, rreg); break; 2107 case lir_sub: __ subss(lreg, rreg); break; 2108 case lir_mul_strictfp: // fall through 2109 case lir_mul: __ mulss(lreg, rreg); break; 2110 case lir_div_strictfp: // fall through 2111 case lir_div: __ divss(lreg, rreg); break; 2112 default: ShouldNotReachHere(); 2113 } 2114 } else { 2115 Address raddr; 2116 if (right->is_single_stack()) { 2117 raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2118 } else if (right->is_constant()) { 2119 // hack for now 2120 raddr = __ as_Address(InternalAddress(float_constant(right->as_jfloat()))); 2121 } else { 2122 ShouldNotReachHere(); 2123 } 2124 switch (code) { 2125 case lir_add: __ addss(lreg, raddr); break; 2126 case lir_sub: __ subss(lreg, raddr); break; 2127 case lir_mul_strictfp: // fall through 2128 case lir_mul: __ mulss(lreg, raddr); break; 2129 case lir_div_strictfp: // fall through 2130 case lir_div: __ divss(lreg, raddr); break; 2131 default: ShouldNotReachHere(); 2132 } 2133 } 2134 2135 } else if (left->is_double_xmm()) { 2136 assert(left == dest, "left and dest must be equal"); 2137 2138 XMMRegister lreg = left->as_xmm_double_reg(); 2139 if (right->is_double_xmm()) { 2140 XMMRegister rreg = right->as_xmm_double_reg(); 2141 switch (code) { 2142 case lir_add: __ addsd(lreg, rreg); break; 2143 case lir_sub: __ subsd(lreg, rreg); break; 2144 case lir_mul_strictfp: // fall through 2145 case lir_mul: __ mulsd(lreg, rreg); break; 2146 case lir_div_strictfp: // fall through 2147 case lir_div: __ divsd(lreg, rreg); break; 2148 default: ShouldNotReachHere(); 2149 } 2150 } else { 2151 Address raddr; 2152 if (right->is_double_stack()) { 2153 raddr = frame_map()->address_for_slot(right->double_stack_ix()); 2154 } else if (right->is_constant()) { 2155 // hack for now 2156 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble()))); 2157 } else { 2158 ShouldNotReachHere(); 2159 } 2160 switch (code) { 2161 case lir_add: __ addsd(lreg, raddr); break; 2162 case lir_sub: __ subsd(lreg, raddr); break; 2163 case lir_mul_strictfp: // fall through 2164 case lir_mul: __ mulsd(lreg, raddr); break; 2165 case lir_div_strictfp: // fall through 2166 case lir_div: __ divsd(lreg, raddr); break; 2167 default: ShouldNotReachHere(); 2168 } 2169 } 2170 2171 } else if (left->is_single_fpu()) { 2172 assert(dest->is_single_fpu(), "fpu stack allocation required"); 2173 2174 if (right->is_single_fpu()) { 2175 arith_fpu_implementation(code, left->fpu_regnr(), right->fpu_regnr(), dest->fpu_regnr(), pop_fpu_stack); 2176 2177 } else { 2178 assert(left->fpu_regnr() == 0, "left must be on TOS"); 2179 assert(dest->fpu_regnr() == 0, "dest must be on TOS"); 2180 2181 Address raddr; 2182 if (right->is_single_stack()) { 2183 raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2184 } else if (right->is_constant()) { 2185 address const_addr = float_constant(right->as_jfloat()); 2186 assert(const_addr != NULL, "incorrect float/double constant maintainance"); 2187 // hack for now 2188 raddr = __ as_Address(InternalAddress(const_addr)); 2189 } else { 2190 ShouldNotReachHere(); 2191 } 2192 2193 switch (code) { 2194 case lir_add: __ fadd_s(raddr); break; 2195 case lir_sub: __ fsub_s(raddr); break; 2196 case lir_mul_strictfp: // fall through 2197 case lir_mul: __ fmul_s(raddr); break; 2198 case lir_div_strictfp: // fall through 2199 case lir_div: __ fdiv_s(raddr); break; 2200 default: ShouldNotReachHere(); 2201 } 2202 } 2203 2204 } else if (left->is_double_fpu()) { 2205 assert(dest->is_double_fpu(), "fpu stack allocation required"); 2206 2207 if (code == lir_mul_strictfp || code == lir_div_strictfp) { 2208 // Double values require special handling for strictfp mul/div on x86 2209 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1())); 2210 __ fmulp(left->fpu_regnrLo() + 1); 2211 } 2212 2213 if (right->is_double_fpu()) { 2214 arith_fpu_implementation(code, left->fpu_regnrLo(), right->fpu_regnrLo(), dest->fpu_regnrLo(), pop_fpu_stack); 2215 2216 } else { 2217 assert(left->fpu_regnrLo() == 0, "left must be on TOS"); 2218 assert(dest->fpu_regnrLo() == 0, "dest must be on TOS"); 2219 2220 Address raddr; 2221 if (right->is_double_stack()) { 2222 raddr = frame_map()->address_for_slot(right->double_stack_ix()); 2223 } else if (right->is_constant()) { 2224 // hack for now 2225 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble()))); 2226 } else { 2227 ShouldNotReachHere(); 2228 } 2229 2230 switch (code) { 2231 case lir_add: __ fadd_d(raddr); break; 2232 case lir_sub: __ fsub_d(raddr); break; 2233 case lir_mul_strictfp: // fall through 2234 case lir_mul: __ fmul_d(raddr); break; 2235 case lir_div_strictfp: // fall through 2236 case lir_div: __ fdiv_d(raddr); break; 2237 default: ShouldNotReachHere(); 2238 } 2239 } 2240 2241 if (code == lir_mul_strictfp || code == lir_div_strictfp) { 2242 // Double values require special handling for strictfp mul/div on x86 2243 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2())); 2244 __ fmulp(dest->fpu_regnrLo() + 1); 2245 } 2246 2247 } else if (left->is_single_stack() || left->is_address()) { 2248 assert(left == dest, "left and dest must be equal"); 2249 2250 Address laddr; 2251 if (left->is_single_stack()) { 2252 laddr = frame_map()->address_for_slot(left->single_stack_ix()); 2253 } else if (left->is_address()) { 2254 laddr = as_Address(left->as_address_ptr()); 2255 } else { 2256 ShouldNotReachHere(); 2257 } 2258 2259 if (right->is_single_cpu()) { 2260 Register rreg = right->as_register(); 2261 switch (code) { 2262 case lir_add: __ addl(laddr, rreg); break; 2263 case lir_sub: __ subl(laddr, rreg); break; 2264 default: ShouldNotReachHere(); 2265 } 2266 } else if (right->is_constant()) { 2267 jint c = right->as_constant_ptr()->as_jint(); 2268 switch (code) { 2269 case lir_add: { 2270 __ incrementl(laddr, c); 2271 break; 2272 } 2273 case lir_sub: { 2274 __ decrementl(laddr, c); 2275 break; 2276 } 2277 default: ShouldNotReachHere(); 2278 } 2279 } else { 2280 ShouldNotReachHere(); 2281 } 2282 2283 } else { 2284 ShouldNotReachHere(); 2285 } 2286 } 2287 2288 void LIR_Assembler::arith_fpu_implementation(LIR_Code code, int left_index, int right_index, int dest_index, bool pop_fpu_stack) { 2289 assert(pop_fpu_stack || (left_index == dest_index || right_index == dest_index), "invalid LIR"); 2290 assert(!pop_fpu_stack || (left_index - 1 == dest_index || right_index - 1 == dest_index), "invalid LIR"); 2291 assert(left_index == 0 || right_index == 0, "either must be on top of stack"); 2292 2293 bool left_is_tos = (left_index == 0); 2294 bool dest_is_tos = (dest_index == 0); 2295 int non_tos_index = (left_is_tos ? right_index : left_index); 2296 2297 switch (code) { 2298 case lir_add: 2299 if (pop_fpu_stack) __ faddp(non_tos_index); 2300 else if (dest_is_tos) __ fadd (non_tos_index); 2301 else __ fadda(non_tos_index); 2302 break; 2303 2304 case lir_sub: 2305 if (left_is_tos) { 2306 if (pop_fpu_stack) __ fsubrp(non_tos_index); 2307 else if (dest_is_tos) __ fsub (non_tos_index); 2308 else __ fsubra(non_tos_index); 2309 } else { 2310 if (pop_fpu_stack) __ fsubp (non_tos_index); 2311 else if (dest_is_tos) __ fsubr (non_tos_index); 2312 else __ fsuba (non_tos_index); 2313 } 2314 break; 2315 2316 case lir_mul_strictfp: // fall through 2317 case lir_mul: 2318 if (pop_fpu_stack) __ fmulp(non_tos_index); 2319 else if (dest_is_tos) __ fmul (non_tos_index); 2320 else __ fmula(non_tos_index); 2321 break; 2322 2323 case lir_div_strictfp: // fall through 2324 case lir_div: 2325 if (left_is_tos) { 2326 if (pop_fpu_stack) __ fdivrp(non_tos_index); 2327 else if (dest_is_tos) __ fdiv (non_tos_index); 2328 else __ fdivra(non_tos_index); 2329 } else { 2330 if (pop_fpu_stack) __ fdivp (non_tos_index); 2331 else if (dest_is_tos) __ fdivr (non_tos_index); 2332 else __ fdiva (non_tos_index); 2333 } 2334 break; 2335 2336 case lir_rem: 2337 assert(left_is_tos && dest_is_tos && right_index == 1, "must be guaranteed by FPU stack allocation"); 2338 __ fremr(noreg); 2339 break; 2340 2341 default: 2342 ShouldNotReachHere(); 2343 } 2344 } 2345 2346 2347 void LIR_Assembler::intrinsic_op(LIR_Code code, LIR_Opr value, LIR_Opr unused, LIR_Opr dest, LIR_Op* op) { 2348 if (value->is_double_xmm()) { 2349 switch(code) { 2350 case lir_abs : 2351 { 2352 if (dest->as_xmm_double_reg() != value->as_xmm_double_reg()) { 2353 __ movdbl(dest->as_xmm_double_reg(), value->as_xmm_double_reg()); 2354 } 2355 __ andpd(dest->as_xmm_double_reg(), 2356 ExternalAddress((address)double_signmask_pool)); 2357 } 2358 break; 2359 2360 case lir_sqrt: __ sqrtsd(dest->as_xmm_double_reg(), value->as_xmm_double_reg()); break; 2361 // all other intrinsics are not available in the SSE instruction set, so FPU is used 2362 default : ShouldNotReachHere(); 2363 } 2364 2365 } else if (value->is_double_fpu()) { 2366 assert(value->fpu_regnrLo() == 0 && dest->fpu_regnrLo() == 0, "both must be on TOS"); 2367 switch(code) { 2368 case lir_abs : __ fabs() ; break; 2369 case lir_sqrt : __ fsqrt(); break; 2370 default : ShouldNotReachHere(); 2371 } 2372 } else { 2373 Unimplemented(); 2374 } 2375 } 2376 2377 void LIR_Assembler::logic_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst) { 2378 // assert(left->destroys_register(), "check"); 2379 if (left->is_single_cpu()) { 2380 Register reg = left->as_register(); 2381 if (right->is_constant()) { 2382 int val = right->as_constant_ptr()->as_jint(); 2383 switch (code) { 2384 case lir_logic_and: __ andl (reg, val); break; 2385 case lir_logic_or: __ orl (reg, val); break; 2386 case lir_logic_xor: __ xorl (reg, val); break; 2387 default: ShouldNotReachHere(); 2388 } 2389 } else if (right->is_stack()) { 2390 // added support for stack operands 2391 Address raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2392 switch (code) { 2393 case lir_logic_and: __ andl (reg, raddr); break; 2394 case lir_logic_or: __ orl (reg, raddr); break; 2395 case lir_logic_xor: __ xorl (reg, raddr); break; 2396 default: ShouldNotReachHere(); 2397 } 2398 } else { 2399 Register rright = right->as_register(); 2400 switch (code) { 2401 case lir_logic_and: __ andptr (reg, rright); break; 2402 case lir_logic_or : __ orptr (reg, rright); break; 2403 case lir_logic_xor: __ xorptr (reg, rright); break; 2404 default: ShouldNotReachHere(); 2405 } 2406 } 2407 move_regs(reg, dst->as_register()); 2408 } else { 2409 Register l_lo = left->as_register_lo(); 2410 Register l_hi = left->as_register_hi(); 2411 if (right->is_constant()) { 2412 #ifdef _LP64 2413 __ mov64(rscratch1, right->as_constant_ptr()->as_jlong()); 2414 switch (code) { 2415 case lir_logic_and: 2416 __ andq(l_lo, rscratch1); 2417 break; 2418 case lir_logic_or: 2419 __ orq(l_lo, rscratch1); 2420 break; 2421 case lir_logic_xor: 2422 __ xorq(l_lo, rscratch1); 2423 break; 2424 default: ShouldNotReachHere(); 2425 } 2426 #else 2427 int r_lo = right->as_constant_ptr()->as_jint_lo(); 2428 int r_hi = right->as_constant_ptr()->as_jint_hi(); 2429 switch (code) { 2430 case lir_logic_and: 2431 __ andl(l_lo, r_lo); 2432 __ andl(l_hi, r_hi); 2433 break; 2434 case lir_logic_or: 2435 __ orl(l_lo, r_lo); 2436 __ orl(l_hi, r_hi); 2437 break; 2438 case lir_logic_xor: 2439 __ xorl(l_lo, r_lo); 2440 __ xorl(l_hi, r_hi); 2441 break; 2442 default: ShouldNotReachHere(); 2443 } 2444 #endif // _LP64 2445 } else { 2446 #ifdef _LP64 2447 Register r_lo; 2448 if (right->type() == T_OBJECT || right->type() == T_ARRAY) { 2449 r_lo = right->as_register(); 2450 } else { 2451 r_lo = right->as_register_lo(); 2452 } 2453 #else 2454 Register r_lo = right->as_register_lo(); 2455 Register r_hi = right->as_register_hi(); 2456 assert(l_lo != r_hi, "overwriting registers"); 2457 #endif 2458 switch (code) { 2459 case lir_logic_and: 2460 __ andptr(l_lo, r_lo); 2461 NOT_LP64(__ andptr(l_hi, r_hi);) 2462 break; 2463 case lir_logic_or: 2464 __ orptr(l_lo, r_lo); 2465 NOT_LP64(__ orptr(l_hi, r_hi);) 2466 break; 2467 case lir_logic_xor: 2468 __ xorptr(l_lo, r_lo); 2469 NOT_LP64(__ xorptr(l_hi, r_hi);) 2470 break; 2471 default: ShouldNotReachHere(); 2472 } 2473 } 2474 2475 Register dst_lo = dst->as_register_lo(); 2476 Register dst_hi = dst->as_register_hi(); 2477 2478 #ifdef _LP64 2479 move_regs(l_lo, dst_lo); 2480 #else 2481 if (dst_lo == l_hi) { 2482 assert(dst_hi != l_lo, "overwriting registers"); 2483 move_regs(l_hi, dst_hi); 2484 move_regs(l_lo, dst_lo); 2485 } else { 2486 assert(dst_lo != l_hi, "overwriting registers"); 2487 move_regs(l_lo, dst_lo); 2488 move_regs(l_hi, dst_hi); 2489 } 2490 #endif // _LP64 2491 } 2492 } 2493 2494 2495 // we assume that rax, and rdx can be overwritten 2496 void LIR_Assembler::arithmetic_idiv(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr temp, LIR_Opr result, CodeEmitInfo* info) { 2497 2498 assert(left->is_single_cpu(), "left must be register"); 2499 assert(right->is_single_cpu() || right->is_constant(), "right must be register or constant"); 2500 assert(result->is_single_cpu(), "result must be register"); 2501 2502 // assert(left->destroys_register(), "check"); 2503 // assert(right->destroys_register(), "check"); 2504 2505 Register lreg = left->as_register(); 2506 Register dreg = result->as_register(); 2507 2508 if (right->is_constant()) { 2509 int divisor = right->as_constant_ptr()->as_jint(); 2510 assert(divisor > 0 && is_power_of_2(divisor), "must be"); 2511 if (code == lir_idiv) { 2512 assert(lreg == rax, "must be rax,"); 2513 assert(temp->as_register() == rdx, "tmp register must be rdx"); 2514 __ cdql(); // sign extend into rdx:rax 2515 if (divisor == 2) { 2516 __ subl(lreg, rdx); 2517 } else { 2518 __ andl(rdx, divisor - 1); 2519 __ addl(lreg, rdx); 2520 } 2521 __ sarl(lreg, log2_intptr(divisor)); 2522 move_regs(lreg, dreg); 2523 } else if (code == lir_irem) { 2524 Label done; 2525 __ mov(dreg, lreg); 2526 __ andl(dreg, 0x80000000 | (divisor - 1)); 2527 __ jcc(Assembler::positive, done); 2528 __ decrement(dreg); 2529 __ orl(dreg, ~(divisor - 1)); 2530 __ increment(dreg); 2531 __ bind(done); 2532 } else { 2533 ShouldNotReachHere(); 2534 } 2535 } else { 2536 Register rreg = right->as_register(); 2537 assert(lreg == rax, "left register must be rax,"); 2538 assert(rreg != rdx, "right register must not be rdx"); 2539 assert(temp->as_register() == rdx, "tmp register must be rdx"); 2540 2541 move_regs(lreg, rax); 2542 2543 int idivl_offset = __ corrected_idivl(rreg); 2544 add_debug_info_for_div0(idivl_offset, info); 2545 if (code == lir_irem) { 2546 move_regs(rdx, dreg); // result is in rdx 2547 } else { 2548 move_regs(rax, dreg); 2549 } 2550 } 2551 } 2552 2553 2554 void LIR_Assembler::comp_op(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Op2* op) { 2555 if (opr1->is_single_cpu()) { 2556 Register reg1 = opr1->as_register(); 2557 if (opr2->is_single_cpu()) { 2558 // cpu register - cpu register 2559 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) { 2560 __ cmpptr(reg1, opr2->as_register()); 2561 } else { 2562 assert(opr2->type() != T_OBJECT && opr2->type() != T_ARRAY, "cmp int, oop?"); 2563 __ cmpl(reg1, opr2->as_register()); 2564 } 2565 } else if (opr2->is_stack()) { 2566 // cpu register - stack 2567 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) { 2568 __ cmpptr(reg1, frame_map()->address_for_slot(opr2->single_stack_ix())); 2569 } else { 2570 __ cmpl(reg1, frame_map()->address_for_slot(opr2->single_stack_ix())); 2571 } 2572 } else if (opr2->is_constant()) { 2573 // cpu register - constant 2574 LIR_Const* c = opr2->as_constant_ptr(); 2575 if (c->type() == T_INT) { 2576 __ cmpl(reg1, c->as_jint()); 2577 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) { 2578 // In 64bit oops are single register 2579 jobject o = c->as_jobject(); 2580 if (o == NULL) { 2581 __ cmpptr(reg1, (int32_t)NULL_WORD); 2582 } else { 2583 #ifdef _LP64 2584 __ movoop(rscratch1, o); 2585 __ cmpptr(reg1, rscratch1); 2586 #else 2587 __ cmpoop(reg1, c->as_jobject()); 2588 #endif // _LP64 2589 } 2590 } else { 2591 fatal("unexpected type: %s", basictype_to_str(c->type())); 2592 } 2593 // cpu register - address 2594 } else if (opr2->is_address()) { 2595 if (op->info() != NULL) { 2596 add_debug_info_for_null_check_here(op->info()); 2597 } 2598 __ cmpl(reg1, as_Address(opr2->as_address_ptr())); 2599 } else { 2600 ShouldNotReachHere(); 2601 } 2602 2603 } else if(opr1->is_double_cpu()) { 2604 Register xlo = opr1->as_register_lo(); 2605 Register xhi = opr1->as_register_hi(); 2606 if (opr2->is_double_cpu()) { 2607 #ifdef _LP64 2608 __ cmpptr(xlo, opr2->as_register_lo()); 2609 #else 2610 // cpu register - cpu register 2611 Register ylo = opr2->as_register_lo(); 2612 Register yhi = opr2->as_register_hi(); 2613 __ subl(xlo, ylo); 2614 __ sbbl(xhi, yhi); 2615 if (condition == lir_cond_equal || condition == lir_cond_notEqual) { 2616 __ orl(xhi, xlo); 2617 } 2618 #endif // _LP64 2619 } else if (opr2->is_constant()) { 2620 // cpu register - constant 0 2621 assert(opr2->as_jlong() == (jlong)0, "only handles zero"); 2622 #ifdef _LP64 2623 __ cmpptr(xlo, (int32_t)opr2->as_jlong()); 2624 #else 2625 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "only handles equals case"); 2626 __ orl(xhi, xlo); 2627 #endif // _LP64 2628 } else { 2629 ShouldNotReachHere(); 2630 } 2631 2632 } else if (opr1->is_single_xmm()) { 2633 XMMRegister reg1 = opr1->as_xmm_float_reg(); 2634 if (opr2->is_single_xmm()) { 2635 // xmm register - xmm register 2636 __ ucomiss(reg1, opr2->as_xmm_float_reg()); 2637 } else if (opr2->is_stack()) { 2638 // xmm register - stack 2639 __ ucomiss(reg1, frame_map()->address_for_slot(opr2->single_stack_ix())); 2640 } else if (opr2->is_constant()) { 2641 // xmm register - constant 2642 __ ucomiss(reg1, InternalAddress(float_constant(opr2->as_jfloat()))); 2643 } else if (opr2->is_address()) { 2644 // xmm register - address 2645 if (op->info() != NULL) { 2646 add_debug_info_for_null_check_here(op->info()); 2647 } 2648 __ ucomiss(reg1, as_Address(opr2->as_address_ptr())); 2649 } else { 2650 ShouldNotReachHere(); 2651 } 2652 2653 } else if (opr1->is_double_xmm()) { 2654 XMMRegister reg1 = opr1->as_xmm_double_reg(); 2655 if (opr2->is_double_xmm()) { 2656 // xmm register - xmm register 2657 __ ucomisd(reg1, opr2->as_xmm_double_reg()); 2658 } else if (opr2->is_stack()) { 2659 // xmm register - stack 2660 __ ucomisd(reg1, frame_map()->address_for_slot(opr2->double_stack_ix())); 2661 } else if (opr2->is_constant()) { 2662 // xmm register - constant 2663 __ ucomisd(reg1, InternalAddress(double_constant(opr2->as_jdouble()))); 2664 } else if (opr2->is_address()) { 2665 // xmm register - address 2666 if (op->info() != NULL) { 2667 add_debug_info_for_null_check_here(op->info()); 2668 } 2669 __ ucomisd(reg1, as_Address(opr2->pointer()->as_address())); 2670 } else { 2671 ShouldNotReachHere(); 2672 } 2673 2674 } else if(opr1->is_single_fpu() || opr1->is_double_fpu()) { 2675 assert(opr1->is_fpu_register() && opr1->fpu() == 0, "currently left-hand side must be on TOS (relax this restriction)"); 2676 assert(opr2->is_fpu_register(), "both must be registers"); 2677 __ fcmp(noreg, opr2->fpu(), op->fpu_pop_count() > 0, op->fpu_pop_count() > 1); 2678 2679 } else if (opr1->is_address() && opr2->is_constant()) { 2680 LIR_Const* c = opr2->as_constant_ptr(); 2681 #ifdef _LP64 2682 if (c->type() == T_OBJECT || c->type() == T_ARRAY) { 2683 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "need to reverse"); 2684 __ movoop(rscratch1, c->as_jobject()); 2685 } 2686 #endif // LP64 2687 if (op->info() != NULL) { 2688 add_debug_info_for_null_check_here(op->info()); 2689 } 2690 // special case: address - constant 2691 LIR_Address* addr = opr1->as_address_ptr(); 2692 if (c->type() == T_INT) { 2693 __ cmpl(as_Address(addr), c->as_jint()); 2694 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) { 2695 #ifdef _LP64 2696 // %%% Make this explode if addr isn't reachable until we figure out a 2697 // better strategy by giving noreg as the temp for as_Address 2698 __ cmpptr(rscratch1, as_Address(addr, noreg)); 2699 #else 2700 __ cmpoop(as_Address(addr), c->as_jobject()); 2701 #endif // _LP64 2702 } else { 2703 ShouldNotReachHere(); 2704 } 2705 2706 } else { 2707 ShouldNotReachHere(); 2708 } 2709 } 2710 2711 void LIR_Assembler::comp_fl2i(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst, LIR_Op2* op) { 2712 if (code == lir_cmp_fd2i || code == lir_ucmp_fd2i) { 2713 if (left->is_single_xmm()) { 2714 assert(right->is_single_xmm(), "must match"); 2715 __ cmpss2int(left->as_xmm_float_reg(), right->as_xmm_float_reg(), dst->as_register(), code == lir_ucmp_fd2i); 2716 } else if (left->is_double_xmm()) { 2717 assert(right->is_double_xmm(), "must match"); 2718 __ cmpsd2int(left->as_xmm_double_reg(), right->as_xmm_double_reg(), dst->as_register(), code == lir_ucmp_fd2i); 2719 2720 } else { 2721 assert(left->is_single_fpu() || left->is_double_fpu(), "must be"); 2722 assert(right->is_single_fpu() || right->is_double_fpu(), "must match"); 2723 2724 assert(left->fpu() == 0, "left must be on TOS"); 2725 __ fcmp2int(dst->as_register(), code == lir_ucmp_fd2i, right->fpu(), 2726 op->fpu_pop_count() > 0, op->fpu_pop_count() > 1); 2727 } 2728 } else { 2729 assert(code == lir_cmp_l2i, "check"); 2730 #ifdef _LP64 2731 Label done; 2732 Register dest = dst->as_register(); 2733 __ cmpptr(left->as_register_lo(), right->as_register_lo()); 2734 __ movl(dest, -1); 2735 __ jccb(Assembler::less, done); 2736 __ set_byte_if_not_zero(dest); 2737 __ movzbl(dest, dest); 2738 __ bind(done); 2739 #else 2740 __ lcmp2int(left->as_register_hi(), 2741 left->as_register_lo(), 2742 right->as_register_hi(), 2743 right->as_register_lo()); 2744 move_regs(left->as_register_hi(), dst->as_register()); 2745 #endif // _LP64 2746 } 2747 } 2748 2749 2750 void LIR_Assembler::align_call(LIR_Code code) { 2751 if (os::is_MP()) { 2752 // make sure that the displacement word of the call ends up word aligned 2753 int offset = __ offset(); 2754 switch (code) { 2755 case lir_static_call: 2756 case lir_optvirtual_call: 2757 case lir_dynamic_call: 2758 offset += NativeCall::displacement_offset; 2759 break; 2760 case lir_icvirtual_call: 2761 offset += NativeCall::displacement_offset + NativeMovConstReg::instruction_size; 2762 break; 2763 case lir_virtual_call: // currently, sparc-specific for niagara 2764 default: ShouldNotReachHere(); 2765 } 2766 __ align(BytesPerWord, offset); 2767 } 2768 } 2769 2770 2771 void LIR_Assembler::call(LIR_OpJavaCall* op, relocInfo::relocType rtype) { 2772 assert(!os::is_MP() || (__ offset() + NativeCall::displacement_offset) % BytesPerWord == 0, 2773 "must be aligned"); 2774 __ call(AddressLiteral(op->addr(), rtype)); 2775 add_call_info(code_offset(), op->info()); 2776 } 2777 2778 2779 void LIR_Assembler::ic_call(LIR_OpJavaCall* op) { 2780 __ ic_call(op->addr()); 2781 add_call_info(code_offset(), op->info()); 2782 assert(!os::is_MP() || 2783 (__ offset() - NativeCall::instruction_size + NativeCall::displacement_offset) % BytesPerWord == 0, 2784 "must be aligned"); 2785 } 2786 2787 2788 /* Currently, vtable-dispatch is only enabled for sparc platforms */ 2789 void LIR_Assembler::vtable_call(LIR_OpJavaCall* op) { 2790 ShouldNotReachHere(); 2791 } 2792 2793 2794 void LIR_Assembler::emit_static_call_stub() { 2795 address call_pc = __ pc(); 2796 address stub = __ start_a_stub(call_stub_size); 2797 if (stub == NULL) { 2798 bailout("static call stub overflow"); 2799 return; 2800 } 2801 2802 int start = __ offset(); 2803 if (os::is_MP()) { 2804 // make sure that the displacement word of the call ends up word aligned 2805 __ align(BytesPerWord, __ offset() + NativeMovConstReg::instruction_size + NativeCall::displacement_offset); 2806 } 2807 __ relocate(static_stub_Relocation::spec(call_pc)); 2808 __ mov_metadata(rbx, (Metadata*)NULL); 2809 // must be set to -1 at code generation time 2810 assert(!os::is_MP() || ((__ offset() + 1) % BytesPerWord) == 0, "must be aligned on MP"); 2811 // On 64bit this will die since it will take a movq & jmp, must be only a jmp 2812 __ jump(RuntimeAddress(__ pc())); 2813 2814 assert(__ offset() - start <= call_stub_size, "stub too big"); 2815 __ end_a_stub(); 2816 } 2817 2818 2819 void LIR_Assembler::throw_op(LIR_Opr exceptionPC, LIR_Opr exceptionOop, CodeEmitInfo* info) { 2820 assert(exceptionOop->as_register() == rax, "must match"); 2821 assert(exceptionPC->as_register() == rdx, "must match"); 2822 2823 // exception object is not added to oop map by LinearScan 2824 // (LinearScan assumes that no oops are in fixed registers) 2825 info->add_register_oop(exceptionOop); 2826 Runtime1::StubID unwind_id; 2827 2828 // get current pc information 2829 // pc is only needed if the method has an exception handler, the unwind code does not need it. 2830 int pc_for_athrow_offset = __ offset(); 2831 InternalAddress pc_for_athrow(__ pc()); 2832 __ lea(exceptionPC->as_register(), pc_for_athrow); 2833 add_call_info(pc_for_athrow_offset, info); // for exception handler 2834 2835 __ verify_not_null_oop(rax); 2836 // search an exception handler (rax: exception oop, rdx: throwing pc) 2837 if (compilation()->has_fpu_code()) { 2838 unwind_id = Runtime1::handle_exception_id; 2839 } else { 2840 unwind_id = Runtime1::handle_exception_nofpu_id; 2841 } 2842 __ call(RuntimeAddress(Runtime1::entry_for(unwind_id))); 2843 2844 // enough room for two byte trap 2845 __ nop(); 2846 } 2847 2848 2849 void LIR_Assembler::unwind_op(LIR_Opr exceptionOop) { 2850 assert(exceptionOop->as_register() == rax, "must match"); 2851 2852 __ jmp(_unwind_handler_entry); 2853 } 2854 2855 2856 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, LIR_Opr count, LIR_Opr dest, LIR_Opr tmp) { 2857 2858 // optimized version for linear scan: 2859 // * count must be already in ECX (guaranteed by LinearScan) 2860 // * left and dest must be equal 2861 // * tmp must be unused 2862 assert(count->as_register() == SHIFT_count, "count must be in ECX"); 2863 assert(left == dest, "left and dest must be equal"); 2864 assert(tmp->is_illegal(), "wasting a register if tmp is allocated"); 2865 2866 if (left->is_single_cpu()) { 2867 Register value = left->as_register(); 2868 assert(value != SHIFT_count, "left cannot be ECX"); 2869 2870 switch (code) { 2871 case lir_shl: __ shll(value); break; 2872 case lir_shr: __ sarl(value); break; 2873 case lir_ushr: __ shrl(value); break; 2874 default: ShouldNotReachHere(); 2875 } 2876 } else if (left->is_double_cpu()) { 2877 Register lo = left->as_register_lo(); 2878 Register hi = left->as_register_hi(); 2879 assert(lo != SHIFT_count && hi != SHIFT_count, "left cannot be ECX"); 2880 #ifdef _LP64 2881 switch (code) { 2882 case lir_shl: __ shlptr(lo); break; 2883 case lir_shr: __ sarptr(lo); break; 2884 case lir_ushr: __ shrptr(lo); break; 2885 default: ShouldNotReachHere(); 2886 } 2887 #else 2888 2889 switch (code) { 2890 case lir_shl: __ lshl(hi, lo); break; 2891 case lir_shr: __ lshr(hi, lo, true); break; 2892 case lir_ushr: __ lshr(hi, lo, false); break; 2893 default: ShouldNotReachHere(); 2894 } 2895 #endif // LP64 2896 } else { 2897 ShouldNotReachHere(); 2898 } 2899 } 2900 2901 2902 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, jint count, LIR_Opr dest) { 2903 if (dest->is_single_cpu()) { 2904 // first move left into dest so that left is not destroyed by the shift 2905 Register value = dest->as_register(); 2906 count = count & 0x1F; // Java spec 2907 2908 move_regs(left->as_register(), value); 2909 switch (code) { 2910 case lir_shl: __ shll(value, count); break; 2911 case lir_shr: __ sarl(value, count); break; 2912 case lir_ushr: __ shrl(value, count); break; 2913 default: ShouldNotReachHere(); 2914 } 2915 } else if (dest->is_double_cpu()) { 2916 #ifndef _LP64 2917 Unimplemented(); 2918 #else 2919 // first move left into dest so that left is not destroyed by the shift 2920 Register value = dest->as_register_lo(); 2921 count = count & 0x1F; // Java spec 2922 2923 move_regs(left->as_register_lo(), value); 2924 switch (code) { 2925 case lir_shl: __ shlptr(value, count); break; 2926 case lir_shr: __ sarptr(value, count); break; 2927 case lir_ushr: __ shrptr(value, count); break; 2928 default: ShouldNotReachHere(); 2929 } 2930 #endif // _LP64 2931 } else { 2932 ShouldNotReachHere(); 2933 } 2934 } 2935 2936 2937 void LIR_Assembler::store_parameter(Register r, int offset_from_rsp_in_words) { 2938 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 2939 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 2940 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 2941 __ movptr (Address(rsp, offset_from_rsp_in_bytes), r); 2942 } 2943 2944 2945 void LIR_Assembler::store_parameter(jint c, int offset_from_rsp_in_words) { 2946 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 2947 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 2948 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 2949 __ movptr (Address(rsp, offset_from_rsp_in_bytes), c); 2950 } 2951 2952 2953 void LIR_Assembler::store_parameter(jobject o, int offset_from_rsp_in_words) { 2954 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 2955 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 2956 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 2957 __ movoop (Address(rsp, offset_from_rsp_in_bytes), o); 2958 } 2959 2960 2961 void LIR_Assembler::store_parameter(Metadata* m, int offset_from_rsp_in_words) { 2962 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 2963 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 2964 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 2965 __ mov_metadata(Address(rsp, offset_from_rsp_in_bytes), m); 2966 } 2967 2968 2969 // This code replaces a call to arraycopy; no exception may 2970 // be thrown in this code, they must be thrown in the System.arraycopy 2971 // activation frame; we could save some checks if this would not be the case 2972 void LIR_Assembler::emit_arraycopy(LIR_OpArrayCopy* op) { 2973 ciArrayKlass* default_type = op->expected_type(); 2974 Register src = op->src()->as_register(); 2975 Register dst = op->dst()->as_register(); 2976 Register src_pos = op->src_pos()->as_register(); 2977 Register dst_pos = op->dst_pos()->as_register(); 2978 Register length = op->length()->as_register(); 2979 Register tmp = op->tmp()->as_register(); 2980 2981 CodeStub* stub = op->stub(); 2982 int flags = op->flags(); 2983 BasicType basic_type = default_type != NULL ? default_type->element_type()->basic_type() : T_ILLEGAL; 2984 if (basic_type == T_ARRAY) basic_type = T_OBJECT; 2985 2986 // if we don't know anything, just go through the generic arraycopy 2987 if (default_type == NULL) { 2988 Label done; 2989 // save outgoing arguments on stack in case call to System.arraycopy is needed 2990 // HACK ALERT. This code used to push the parameters in a hardwired fashion 2991 // for interpreter calling conventions. Now we have to do it in new style conventions. 2992 // For the moment until C1 gets the new register allocator I just force all the 2993 // args to the right place (except the register args) and then on the back side 2994 // reload the register args properly if we go slow path. Yuck 2995 2996 // These are proper for the calling convention 2997 store_parameter(length, 2); 2998 store_parameter(dst_pos, 1); 2999 store_parameter(dst, 0); 3000 3001 // these are just temporary placements until we need to reload 3002 store_parameter(src_pos, 3); 3003 store_parameter(src, 4); 3004 NOT_LP64(assert(src == rcx && src_pos == rdx, "mismatch in calling convention");) 3005 3006 address C_entry = CAST_FROM_FN_PTR(address, Runtime1::arraycopy); 3007 3008 address copyfunc_addr = StubRoutines::generic_arraycopy(); 3009 3010 // pass arguments: may push as this is not a safepoint; SP must be fix at each safepoint 3011 #ifdef _LP64 3012 // The arguments are in java calling convention so we can trivially shift them to C 3013 // convention 3014 assert_different_registers(c_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4); 3015 __ mov(c_rarg0, j_rarg0); 3016 assert_different_registers(c_rarg1, j_rarg2, j_rarg3, j_rarg4); 3017 __ mov(c_rarg1, j_rarg1); 3018 assert_different_registers(c_rarg2, j_rarg3, j_rarg4); 3019 __ mov(c_rarg2, j_rarg2); 3020 assert_different_registers(c_rarg3, j_rarg4); 3021 __ mov(c_rarg3, j_rarg3); 3022 #ifdef _WIN64 3023 // Allocate abi space for args but be sure to keep stack aligned 3024 __ subptr(rsp, 6*wordSize); 3025 store_parameter(j_rarg4, 4); 3026 if (copyfunc_addr == NULL) { // Use C version if stub was not generated 3027 __ call(RuntimeAddress(C_entry)); 3028 } else { 3029 #ifndef PRODUCT 3030 if (PrintC1Statistics) { 3031 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt)); 3032 } 3033 #endif 3034 __ call(RuntimeAddress(copyfunc_addr)); 3035 } 3036 __ addptr(rsp, 6*wordSize); 3037 #else 3038 __ mov(c_rarg4, j_rarg4); 3039 if (copyfunc_addr == NULL) { // Use C version if stub was not generated 3040 __ call(RuntimeAddress(C_entry)); 3041 } else { 3042 #ifndef PRODUCT 3043 if (PrintC1Statistics) { 3044 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt)); 3045 } 3046 #endif 3047 __ call(RuntimeAddress(copyfunc_addr)); 3048 } 3049 #endif // _WIN64 3050 #else 3051 __ push(length); 3052 __ push(dst_pos); 3053 __ push(dst); 3054 __ push(src_pos); 3055 __ push(src); 3056 3057 if (copyfunc_addr == NULL) { // Use C version if stub was not generated 3058 __ call_VM_leaf(C_entry, 5); // removes pushed parameter from the stack 3059 } else { 3060 #ifndef PRODUCT 3061 if (PrintC1Statistics) { 3062 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt)); 3063 } 3064 #endif 3065 __ call_VM_leaf(copyfunc_addr, 5); // removes pushed parameter from the stack 3066 } 3067 3068 #endif // _LP64 3069 3070 __ cmpl(rax, 0); 3071 __ jcc(Assembler::equal, *stub->continuation()); 3072 3073 if (copyfunc_addr != NULL) { 3074 __ mov(tmp, rax); 3075 __ xorl(tmp, -1); 3076 } 3077 3078 // Reload values from the stack so they are where the stub 3079 // expects them. 3080 __ movptr (dst, Address(rsp, 0*BytesPerWord)); 3081 __ movptr (dst_pos, Address(rsp, 1*BytesPerWord)); 3082 __ movptr (length, Address(rsp, 2*BytesPerWord)); 3083 __ movptr (src_pos, Address(rsp, 3*BytesPerWord)); 3084 __ movptr (src, Address(rsp, 4*BytesPerWord)); 3085 3086 if (copyfunc_addr != NULL) { 3087 __ subl(length, tmp); 3088 __ addl(src_pos, tmp); 3089 __ addl(dst_pos, tmp); 3090 } 3091 __ jmp(*stub->entry()); 3092 3093 __ bind(*stub->continuation()); 3094 return; 3095 } 3096 3097 assert(default_type != NULL && default_type->is_array_klass() && default_type->is_loaded(), "must be true at this point"); 3098 3099 int elem_size = type2aelembytes(basic_type); 3100 Address::ScaleFactor scale; 3101 3102 switch (elem_size) { 3103 case 1 : 3104 scale = Address::times_1; 3105 break; 3106 case 2 : 3107 scale = Address::times_2; 3108 break; 3109 case 4 : 3110 scale = Address::times_4; 3111 break; 3112 case 8 : 3113 scale = Address::times_8; 3114 break; 3115 default: 3116 scale = Address::no_scale; 3117 ShouldNotReachHere(); 3118 } 3119 3120 Address src_length_addr = Address(src, arrayOopDesc::length_offset_in_bytes()); 3121 Address dst_length_addr = Address(dst, arrayOopDesc::length_offset_in_bytes()); 3122 Address src_klass_addr = Address(src, oopDesc::klass_offset_in_bytes()); 3123 Address dst_klass_addr = Address(dst, oopDesc::klass_offset_in_bytes()); 3124 3125 // length and pos's are all sign extended at this point on 64bit 3126 3127 // test for NULL 3128 if (flags & LIR_OpArrayCopy::src_null_check) { 3129 __ testptr(src, src); 3130 __ jcc(Assembler::zero, *stub->entry()); 3131 } 3132 if (flags & LIR_OpArrayCopy::dst_null_check) { 3133 __ testptr(dst, dst); 3134 __ jcc(Assembler::zero, *stub->entry()); 3135 } 3136 3137 // If the compiler was not able to prove that exact type of the source or the destination 3138 // of the arraycopy is an array type, check at runtime if the source or the destination is 3139 // an instance type. 3140 if (flags & LIR_OpArrayCopy::type_check) { 3141 if (!(flags & LIR_OpArrayCopy::dst_objarray)) { 3142 __ load_klass(tmp, dst); 3143 __ cmpl(Address(tmp, in_bytes(Klass::layout_helper_offset())), Klass::_lh_neutral_value); 3144 __ jcc(Assembler::greaterEqual, *stub->entry()); 3145 } 3146 3147 if (!(flags & LIR_OpArrayCopy::src_objarray)) { 3148 __ load_klass(tmp, src); 3149 __ cmpl(Address(tmp, in_bytes(Klass::layout_helper_offset())), Klass::_lh_neutral_value); 3150 __ jcc(Assembler::greaterEqual, *stub->entry()); 3151 } 3152 } 3153 3154 // check if negative 3155 if (flags & LIR_OpArrayCopy::src_pos_positive_check) { 3156 __ testl(src_pos, src_pos); 3157 __ jcc(Assembler::less, *stub->entry()); 3158 } 3159 if (flags & LIR_OpArrayCopy::dst_pos_positive_check) { 3160 __ testl(dst_pos, dst_pos); 3161 __ jcc(Assembler::less, *stub->entry()); 3162 } 3163 3164 if (flags & LIR_OpArrayCopy::src_range_check) { 3165 __ lea(tmp, Address(src_pos, length, Address::times_1, 0)); 3166 __ cmpl(tmp, src_length_addr); 3167 __ jcc(Assembler::above, *stub->entry()); 3168 } 3169 if (flags & LIR_OpArrayCopy::dst_range_check) { 3170 __ lea(tmp, Address(dst_pos, length, Address::times_1, 0)); 3171 __ cmpl(tmp, dst_length_addr); 3172 __ jcc(Assembler::above, *stub->entry()); 3173 } 3174 3175 if (flags & LIR_OpArrayCopy::length_positive_check) { 3176 __ testl(length, length); 3177 __ jcc(Assembler::less, *stub->entry()); 3178 __ jcc(Assembler::zero, *stub->continuation()); 3179 } 3180 3181 #ifdef _LP64 3182 __ movl2ptr(src_pos, src_pos); //higher 32bits must be null 3183 __ movl2ptr(dst_pos, dst_pos); //higher 32bits must be null 3184 #endif 3185 3186 if (flags & LIR_OpArrayCopy::type_check) { 3187 // We don't know the array types are compatible 3188 if (basic_type != T_OBJECT) { 3189 // Simple test for basic type arrays 3190 if (UseCompressedClassPointers) { 3191 __ movl(tmp, src_klass_addr); 3192 __ cmpl(tmp, dst_klass_addr); 3193 } else { 3194 __ movptr(tmp, src_klass_addr); 3195 __ cmpptr(tmp, dst_klass_addr); 3196 } 3197 __ jcc(Assembler::notEqual, *stub->entry()); 3198 } else { 3199 // For object arrays, if src is a sub class of dst then we can 3200 // safely do the copy. 3201 Label cont, slow; 3202 3203 __ push(src); 3204 __ push(dst); 3205 3206 __ load_klass(src, src); 3207 __ load_klass(dst, dst); 3208 3209 __ check_klass_subtype_fast_path(src, dst, tmp, &cont, &slow, NULL); 3210 3211 __ push(src); 3212 __ push(dst); 3213 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 3214 __ pop(dst); 3215 __ pop(src); 3216 3217 __ cmpl(src, 0); 3218 __ jcc(Assembler::notEqual, cont); 3219 3220 __ bind(slow); 3221 __ pop(dst); 3222 __ pop(src); 3223 3224 address copyfunc_addr = StubRoutines::checkcast_arraycopy(); 3225 if (copyfunc_addr != NULL) { // use stub if available 3226 // src is not a sub class of dst so we have to do a 3227 // per-element check. 3228 3229 int mask = LIR_OpArrayCopy::src_objarray|LIR_OpArrayCopy::dst_objarray; 3230 if ((flags & mask) != mask) { 3231 // Check that at least both of them object arrays. 3232 assert(flags & mask, "one of the two should be known to be an object array"); 3233 3234 if (!(flags & LIR_OpArrayCopy::src_objarray)) { 3235 __ load_klass(tmp, src); 3236 } else if (!(flags & LIR_OpArrayCopy::dst_objarray)) { 3237 __ load_klass(tmp, dst); 3238 } 3239 int lh_offset = in_bytes(Klass::layout_helper_offset()); 3240 Address klass_lh_addr(tmp, lh_offset); 3241 jint objArray_lh = Klass::array_layout_helper(T_OBJECT); 3242 __ cmpl(klass_lh_addr, objArray_lh); 3243 __ jcc(Assembler::notEqual, *stub->entry()); 3244 } 3245 3246 // Spill because stubs can use any register they like and it's 3247 // easier to restore just those that we care about. 3248 store_parameter(dst, 0); 3249 store_parameter(dst_pos, 1); 3250 store_parameter(length, 2); 3251 store_parameter(src_pos, 3); 3252 store_parameter(src, 4); 3253 3254 #ifndef _LP64 3255 __ movptr(tmp, dst_klass_addr); 3256 __ movptr(tmp, Address(tmp, ObjArrayKlass::element_klass_offset())); 3257 __ push(tmp); 3258 __ movl(tmp, Address(tmp, Klass::super_check_offset_offset())); 3259 __ push(tmp); 3260 __ push(length); 3261 __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3262 __ push(tmp); 3263 __ lea(tmp, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3264 __ push(tmp); 3265 3266 __ call_VM_leaf(copyfunc_addr, 5); 3267 #else 3268 __ movl2ptr(length, length); //higher 32bits must be null 3269 3270 __ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3271 assert_different_registers(c_rarg0, dst, dst_pos, length); 3272 __ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3273 assert_different_registers(c_rarg1, dst, length); 3274 3275 __ mov(c_rarg2, length); 3276 assert_different_registers(c_rarg2, dst); 3277 3278 #ifdef _WIN64 3279 // Allocate abi space for args but be sure to keep stack aligned 3280 __ subptr(rsp, 6*wordSize); 3281 __ load_klass(c_rarg3, dst); 3282 __ movptr(c_rarg3, Address(c_rarg3, ObjArrayKlass::element_klass_offset())); 3283 store_parameter(c_rarg3, 4); 3284 __ movl(c_rarg3, Address(c_rarg3, Klass::super_check_offset_offset())); 3285 __ call(RuntimeAddress(copyfunc_addr)); 3286 __ addptr(rsp, 6*wordSize); 3287 #else 3288 __ load_klass(c_rarg4, dst); 3289 __ movptr(c_rarg4, Address(c_rarg4, ObjArrayKlass::element_klass_offset())); 3290 __ movl(c_rarg3, Address(c_rarg4, Klass::super_check_offset_offset())); 3291 __ call(RuntimeAddress(copyfunc_addr)); 3292 #endif 3293 3294 #endif 3295 3296 #ifndef PRODUCT 3297 if (PrintC1Statistics) { 3298 Label failed; 3299 __ testl(rax, rax); 3300 __ jcc(Assembler::notZero, failed); 3301 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_cnt)); 3302 __ bind(failed); 3303 } 3304 #endif 3305 3306 __ testl(rax, rax); 3307 __ jcc(Assembler::zero, *stub->continuation()); 3308 3309 #ifndef PRODUCT 3310 if (PrintC1Statistics) { 3311 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_attempt_cnt)); 3312 } 3313 #endif 3314 3315 __ mov(tmp, rax); 3316 3317 __ xorl(tmp, -1); 3318 3319 // Restore previously spilled arguments 3320 __ movptr (dst, Address(rsp, 0*BytesPerWord)); 3321 __ movptr (dst_pos, Address(rsp, 1*BytesPerWord)); 3322 __ movptr (length, Address(rsp, 2*BytesPerWord)); 3323 __ movptr (src_pos, Address(rsp, 3*BytesPerWord)); 3324 __ movptr (src, Address(rsp, 4*BytesPerWord)); 3325 3326 3327 __ subl(length, tmp); 3328 __ addl(src_pos, tmp); 3329 __ addl(dst_pos, tmp); 3330 } 3331 3332 __ jmp(*stub->entry()); 3333 3334 __ bind(cont); 3335 __ pop(dst); 3336 __ pop(src); 3337 } 3338 } 3339 3340 #ifdef ASSERT 3341 if (basic_type != T_OBJECT || !(flags & LIR_OpArrayCopy::type_check)) { 3342 // Sanity check the known type with the incoming class. For the 3343 // primitive case the types must match exactly with src.klass and 3344 // dst.klass each exactly matching the default type. For the 3345 // object array case, if no type check is needed then either the 3346 // dst type is exactly the expected type and the src type is a 3347 // subtype which we can't check or src is the same array as dst 3348 // but not necessarily exactly of type default_type. 3349 Label known_ok, halt; 3350 __ mov_metadata(tmp, default_type->constant_encoding()); 3351 #ifdef _LP64 3352 if (UseCompressedClassPointers) { 3353 __ encode_klass_not_null(tmp); 3354 } 3355 #endif 3356 3357 if (basic_type != T_OBJECT) { 3358 3359 if (UseCompressedClassPointers) __ cmpl(tmp, dst_klass_addr); 3360 else __ cmpptr(tmp, dst_klass_addr); 3361 __ jcc(Assembler::notEqual, halt); 3362 if (UseCompressedClassPointers) __ cmpl(tmp, src_klass_addr); 3363 else __ cmpptr(tmp, src_klass_addr); 3364 __ jcc(Assembler::equal, known_ok); 3365 } else { 3366 if (UseCompressedClassPointers) __ cmpl(tmp, dst_klass_addr); 3367 else __ cmpptr(tmp, dst_klass_addr); 3368 __ jcc(Assembler::equal, known_ok); 3369 __ cmpptr(src, dst); 3370 __ jcc(Assembler::equal, known_ok); 3371 } 3372 __ bind(halt); 3373 __ stop("incorrect type information in arraycopy"); 3374 __ bind(known_ok); 3375 } 3376 #endif 3377 3378 #ifndef PRODUCT 3379 if (PrintC1Statistics) { 3380 __ incrementl(ExternalAddress(Runtime1::arraycopy_count_address(basic_type))); 3381 } 3382 #endif 3383 3384 #ifdef _LP64 3385 assert_different_registers(c_rarg0, dst, dst_pos, length); 3386 __ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3387 assert_different_registers(c_rarg1, length); 3388 __ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3389 __ mov(c_rarg2, length); 3390 3391 #else 3392 __ lea(tmp, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3393 store_parameter(tmp, 0); 3394 __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3395 store_parameter(tmp, 1); 3396 store_parameter(length, 2); 3397 #endif // _LP64 3398 3399 bool disjoint = (flags & LIR_OpArrayCopy::overlapping) == 0; 3400 bool aligned = (flags & LIR_OpArrayCopy::unaligned) == 0; 3401 const char *name; 3402 address entry = StubRoutines::select_arraycopy_function(basic_type, aligned, disjoint, name, false); 3403 __ call_VM_leaf(entry, 0); 3404 3405 __ bind(*stub->continuation()); 3406 } 3407 3408 void LIR_Assembler::emit_updatecrc32(LIR_OpUpdateCRC32* op) { 3409 assert(op->crc()->is_single_cpu(), "crc must be register"); 3410 assert(op->val()->is_single_cpu(), "byte value must be register"); 3411 assert(op->result_opr()->is_single_cpu(), "result must be register"); 3412 Register crc = op->crc()->as_register(); 3413 Register val = op->val()->as_register(); 3414 Register res = op->result_opr()->as_register(); 3415 3416 assert_different_registers(val, crc, res); 3417 3418 __ lea(res, ExternalAddress(StubRoutines::crc_table_addr())); 3419 __ notl(crc); // ~crc 3420 __ update_byte_crc32(crc, val, res); 3421 __ notl(crc); // ~crc 3422 __ mov(res, crc); 3423 } 3424 3425 void LIR_Assembler::emit_lock(LIR_OpLock* op) { 3426 Register obj = op->obj_opr()->as_register(); // may not be an oop 3427 Register hdr = op->hdr_opr()->as_register(); 3428 Register lock = op->lock_opr()->as_register(); 3429 if (!UseFastLocking) { 3430 __ jmp(*op->stub()->entry()); 3431 } else if (op->code() == lir_lock) { 3432 Register scratch = noreg; 3433 if (UseBiasedLocking) { 3434 scratch = op->scratch_opr()->as_register(); 3435 } 3436 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header"); 3437 // add debug info for NullPointerException only if one is possible 3438 int null_check_offset = __ lock_object(hdr, obj, lock, scratch, *op->stub()->entry()); 3439 if (op->info() != NULL) { 3440 add_debug_info_for_null_check(null_check_offset, op->info()); 3441 } 3442 // done 3443 } else if (op->code() == lir_unlock) { 3444 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header"); 3445 __ unlock_object(hdr, obj, lock, *op->stub()->entry()); 3446 } else { 3447 Unimplemented(); 3448 } 3449 __ bind(*op->stub()->continuation()); 3450 } 3451 3452 3453 void LIR_Assembler::emit_profile_call(LIR_OpProfileCall* op) { 3454 ciMethod* method = op->profiled_method(); 3455 int bci = op->profiled_bci(); 3456 ciMethod* callee = op->profiled_callee(); 3457 3458 // Update counter for all call types 3459 ciMethodData* md = method->method_data_or_null(); 3460 assert(md != NULL, "Sanity"); 3461 ciProfileData* data = md->bci_to_data(bci); 3462 assert(data->is_CounterData(), "need CounterData for calls"); 3463 assert(op->mdo()->is_single_cpu(), "mdo must be allocated"); 3464 Register mdo = op->mdo()->as_register(); 3465 __ mov_metadata(mdo, md->constant_encoding()); 3466 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset())); 3467 Bytecodes::Code bc = method->java_code_at_bci(bci); 3468 const bool callee_is_static = callee->is_loaded() && callee->is_static(); 3469 // Perform additional virtual call profiling for invokevirtual and 3470 // invokeinterface bytecodes 3471 if ((bc == Bytecodes::_invokevirtual || bc == Bytecodes::_invokeinterface) && 3472 !callee_is_static && // required for optimized MH invokes 3473 C1ProfileVirtualCalls) { 3474 assert(op->recv()->is_single_cpu(), "recv must be allocated"); 3475 Register recv = op->recv()->as_register(); 3476 assert_different_registers(mdo, recv); 3477 assert(data->is_VirtualCallData(), "need VirtualCallData for virtual calls"); 3478 ciKlass* known_klass = op->known_holder(); 3479 if (C1OptimizeVirtualCallProfiling && known_klass != NULL) { 3480 // We know the type that will be seen at this call site; we can 3481 // statically update the MethodData* rather than needing to do 3482 // dynamic tests on the receiver type 3483 3484 // NOTE: we should probably put a lock around this search to 3485 // avoid collisions by concurrent compilations 3486 ciVirtualCallData* vc_data = (ciVirtualCallData*) data; 3487 uint i; 3488 for (i = 0; i < VirtualCallData::row_limit(); i++) { 3489 ciKlass* receiver = vc_data->receiver(i); 3490 if (known_klass->equals(receiver)) { 3491 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i))); 3492 __ addptr(data_addr, DataLayout::counter_increment); 3493 return; 3494 } 3495 } 3496 3497 // Receiver type not found in profile data; select an empty slot 3498 3499 // Note that this is less efficient than it should be because it 3500 // always does a write to the receiver part of the 3501 // VirtualCallData rather than just the first time 3502 for (i = 0; i < VirtualCallData::row_limit(); i++) { 3503 ciKlass* receiver = vc_data->receiver(i); 3504 if (receiver == NULL) { 3505 Address recv_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_offset(i))); 3506 __ mov_metadata(recv_addr, known_klass->constant_encoding()); 3507 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i))); 3508 __ addptr(data_addr, DataLayout::counter_increment); 3509 return; 3510 } 3511 } 3512 } else { 3513 __ load_klass(recv, recv); 3514 Label update_done; 3515 type_profile_helper(mdo, md, data, recv, &update_done); 3516 // Receiver did not match any saved receiver and there is no empty row for it. 3517 // Increment total counter to indicate polymorphic case. 3518 __ addptr(counter_addr, DataLayout::counter_increment); 3519 3520 __ bind(update_done); 3521 } 3522 } else { 3523 // Static call 3524 __ addptr(counter_addr, DataLayout::counter_increment); 3525 } 3526 } 3527 3528 void LIR_Assembler::emit_profile_type(LIR_OpProfileType* op) { 3529 Register obj = op->obj()->as_register(); 3530 Register tmp = op->tmp()->as_pointer_register(); 3531 Address mdo_addr = as_Address(op->mdp()->as_address_ptr()); 3532 ciKlass* exact_klass = op->exact_klass(); 3533 intptr_t current_klass = op->current_klass(); 3534 bool not_null = op->not_null(); 3535 bool no_conflict = op->no_conflict(); 3536 3537 Label update, next, none; 3538 3539 bool do_null = !not_null; 3540 bool exact_klass_set = exact_klass != NULL && ciTypeEntries::valid_ciklass(current_klass) == exact_klass; 3541 bool do_update = !TypeEntries::is_type_unknown(current_klass) && !exact_klass_set; 3542 3543 assert(do_null || do_update, "why are we here?"); 3544 assert(!TypeEntries::was_null_seen(current_klass) || do_update, "why are we here?"); 3545 3546 __ verify_oop(obj); 3547 3548 if (tmp != obj) { 3549 __ mov(tmp, obj); 3550 } 3551 if (do_null) { 3552 __ testptr(tmp, tmp); 3553 __ jccb(Assembler::notZero, update); 3554 if (!TypeEntries::was_null_seen(current_klass)) { 3555 __ orptr(mdo_addr, TypeEntries::null_seen); 3556 } 3557 if (do_update) { 3558 #ifndef ASSERT 3559 __ jmpb(next); 3560 } 3561 #else 3562 __ jmp(next); 3563 } 3564 } else { 3565 __ testptr(tmp, tmp); 3566 __ jccb(Assembler::notZero, update); 3567 __ stop("unexpect null obj"); 3568 #endif 3569 } 3570 3571 __ bind(update); 3572 3573 if (do_update) { 3574 #ifdef ASSERT 3575 if (exact_klass != NULL) { 3576 Label ok; 3577 __ load_klass(tmp, tmp); 3578 __ push(tmp); 3579 __ mov_metadata(tmp, exact_klass->constant_encoding()); 3580 __ cmpptr(tmp, Address(rsp, 0)); 3581 __ jccb(Assembler::equal, ok); 3582 __ stop("exact klass and actual klass differ"); 3583 __ bind(ok); 3584 __ pop(tmp); 3585 } 3586 #endif 3587 if (!no_conflict) { 3588 if (exact_klass == NULL || TypeEntries::is_type_none(current_klass)) { 3589 if (exact_klass != NULL) { 3590 __ mov_metadata(tmp, exact_klass->constant_encoding()); 3591 } else { 3592 __ load_klass(tmp, tmp); 3593 } 3594 3595 __ xorptr(tmp, mdo_addr); 3596 __ testptr(tmp, TypeEntries::type_klass_mask); 3597 // klass seen before, nothing to do. The unknown bit may have been 3598 // set already but no need to check. 3599 __ jccb(Assembler::zero, next); 3600 3601 __ testptr(tmp, TypeEntries::type_unknown); 3602 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore. 3603 3604 if (TypeEntries::is_type_none(current_klass)) { 3605 __ cmpptr(mdo_addr, 0); 3606 __ jccb(Assembler::equal, none); 3607 __ cmpptr(mdo_addr, TypeEntries::null_seen); 3608 __ jccb(Assembler::equal, none); 3609 // There is a chance that the checks above (re-reading profiling 3610 // data from memory) fail if another thread has just set the 3611 // profiling to this obj's klass 3612 __ xorptr(tmp, mdo_addr); 3613 __ testptr(tmp, TypeEntries::type_klass_mask); 3614 __ jccb(Assembler::zero, next); 3615 } 3616 } else { 3617 assert(ciTypeEntries::valid_ciklass(current_klass) != NULL && 3618 ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "conflict only"); 3619 3620 __ movptr(tmp, mdo_addr); 3621 __ testptr(tmp, TypeEntries::type_unknown); 3622 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore. 3623 } 3624 3625 // different than before. Cannot keep accurate profile. 3626 __ orptr(mdo_addr, TypeEntries::type_unknown); 3627 3628 if (TypeEntries::is_type_none(current_klass)) { 3629 __ jmpb(next); 3630 3631 __ bind(none); 3632 // first time here. Set profile type. 3633 __ movptr(mdo_addr, tmp); 3634 } 3635 } else { 3636 // There's a single possible klass at this profile point 3637 assert(exact_klass != NULL, "should be"); 3638 if (TypeEntries::is_type_none(current_klass)) { 3639 __ mov_metadata(tmp, exact_klass->constant_encoding()); 3640 __ xorptr(tmp, mdo_addr); 3641 __ testptr(tmp, TypeEntries::type_klass_mask); 3642 #ifdef ASSERT 3643 __ jcc(Assembler::zero, next); 3644 3645 { 3646 Label ok; 3647 __ push(tmp); 3648 __ cmpptr(mdo_addr, 0); 3649 __ jcc(Assembler::equal, ok); 3650 __ cmpptr(mdo_addr, TypeEntries::null_seen); 3651 __ jcc(Assembler::equal, ok); 3652 // may have been set by another thread 3653 __ mov_metadata(tmp, exact_klass->constant_encoding()); 3654 __ xorptr(tmp, mdo_addr); 3655 __ testptr(tmp, TypeEntries::type_mask); 3656 __ jcc(Assembler::zero, ok); 3657 3658 __ stop("unexpected profiling mismatch"); 3659 __ bind(ok); 3660 __ pop(tmp); 3661 } 3662 #else 3663 __ jccb(Assembler::zero, next); 3664 #endif 3665 // first time here. Set profile type. 3666 __ movptr(mdo_addr, tmp); 3667 } else { 3668 assert(ciTypeEntries::valid_ciklass(current_klass) != NULL && 3669 ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "inconsistent"); 3670 3671 __ movptr(tmp, mdo_addr); 3672 __ testptr(tmp, TypeEntries::type_unknown); 3673 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore. 3674 3675 __ orptr(mdo_addr, TypeEntries::type_unknown); 3676 } 3677 } 3678 3679 __ bind(next); 3680 } 3681 } 3682 3683 void LIR_Assembler::emit_delay(LIR_OpDelay*) { 3684 Unimplemented(); 3685 } 3686 3687 3688 void LIR_Assembler::monitor_address(int monitor_no, LIR_Opr dst) { 3689 __ lea(dst->as_register(), frame_map()->address_for_monitor_lock(monitor_no)); 3690 } 3691 3692 3693 void LIR_Assembler::align_backward_branch_target() { 3694 __ align(BytesPerWord); 3695 } 3696 3697 3698 void LIR_Assembler::negate(LIR_Opr left, LIR_Opr dest) { 3699 if (left->is_single_cpu()) { 3700 __ negl(left->as_register()); 3701 move_regs(left->as_register(), dest->as_register()); 3702 3703 } else if (left->is_double_cpu()) { 3704 Register lo = left->as_register_lo(); 3705 #ifdef _LP64 3706 Register dst = dest->as_register_lo(); 3707 __ movptr(dst, lo); 3708 __ negptr(dst); 3709 #else 3710 Register hi = left->as_register_hi(); 3711 __ lneg(hi, lo); 3712 if (dest->as_register_lo() == hi) { 3713 assert(dest->as_register_hi() != lo, "destroying register"); 3714 move_regs(hi, dest->as_register_hi()); 3715 move_regs(lo, dest->as_register_lo()); 3716 } else { 3717 move_regs(lo, dest->as_register_lo()); 3718 move_regs(hi, dest->as_register_hi()); 3719 } 3720 #endif // _LP64 3721 3722 } else if (dest->is_single_xmm()) { 3723 if (left->as_xmm_float_reg() != dest->as_xmm_float_reg()) { 3724 __ movflt(dest->as_xmm_float_reg(), left->as_xmm_float_reg()); 3725 } 3726 if (UseAVX > 0) { 3727 __ vnegatess(dest->as_xmm_float_reg(), dest->as_xmm_float_reg(), 3728 ExternalAddress((address)float_signflip_pool)); 3729 } else { 3730 __ xorps(dest->as_xmm_float_reg(), 3731 ExternalAddress((address)float_signflip_pool)); 3732 } 3733 } else if (dest->is_double_xmm()) { 3734 if (left->as_xmm_double_reg() != dest->as_xmm_double_reg()) { 3735 __ movdbl(dest->as_xmm_double_reg(), left->as_xmm_double_reg()); 3736 } 3737 if (UseAVX > 0) { 3738 __ vnegatesd(dest->as_xmm_double_reg(), dest->as_xmm_double_reg(), 3739 ExternalAddress((address)double_signflip_pool)); 3740 } else { 3741 __ xorpd(dest->as_xmm_double_reg(), 3742 ExternalAddress((address)double_signflip_pool)); 3743 } 3744 } else if (left->is_single_fpu() || left->is_double_fpu()) { 3745 assert(left->fpu() == 0, "arg must be on TOS"); 3746 assert(dest->fpu() == 0, "dest must be TOS"); 3747 __ fchs(); 3748 3749 } else { 3750 ShouldNotReachHere(); 3751 } 3752 } 3753 3754 3755 void LIR_Assembler::leal(LIR_Opr addr, LIR_Opr dest) { 3756 assert(addr->is_address() && dest->is_register(), "check"); 3757 Register reg; 3758 reg = dest->as_pointer_register(); 3759 __ lea(reg, as_Address(addr->as_address_ptr())); 3760 } 3761 3762 3763 3764 void LIR_Assembler::rt_call(LIR_Opr result, address dest, const LIR_OprList* args, LIR_Opr tmp, CodeEmitInfo* info) { 3765 assert(!tmp->is_valid(), "don't need temporary"); 3766 __ call(RuntimeAddress(dest)); 3767 if (info != NULL) { 3768 add_call_info_here(info); 3769 } 3770 } 3771 3772 3773 void LIR_Assembler::volatile_move_op(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info) { 3774 assert(type == T_LONG, "only for volatile long fields"); 3775 3776 if (info != NULL) { 3777 add_debug_info_for_null_check_here(info); 3778 } 3779 3780 if (src->is_double_xmm()) { 3781 if (dest->is_double_cpu()) { 3782 #ifdef _LP64 3783 __ movdq(dest->as_register_lo(), src->as_xmm_double_reg()); 3784 #else 3785 __ movdl(dest->as_register_lo(), src->as_xmm_double_reg()); 3786 __ psrlq(src->as_xmm_double_reg(), 32); 3787 __ movdl(dest->as_register_hi(), src->as_xmm_double_reg()); 3788 #endif // _LP64 3789 } else if (dest->is_double_stack()) { 3790 __ movdbl(frame_map()->address_for_slot(dest->double_stack_ix()), src->as_xmm_double_reg()); 3791 } else if (dest->is_address()) { 3792 __ movdbl(as_Address(dest->as_address_ptr()), src->as_xmm_double_reg()); 3793 } else { 3794 ShouldNotReachHere(); 3795 } 3796 3797 } else if (dest->is_double_xmm()) { 3798 if (src->is_double_stack()) { 3799 __ movdbl(dest->as_xmm_double_reg(), frame_map()->address_for_slot(src->double_stack_ix())); 3800 } else if (src->is_address()) { 3801 __ movdbl(dest->as_xmm_double_reg(), as_Address(src->as_address_ptr())); 3802 } else { 3803 ShouldNotReachHere(); 3804 } 3805 3806 } else if (src->is_double_fpu()) { 3807 assert(src->fpu_regnrLo() == 0, "must be TOS"); 3808 if (dest->is_double_stack()) { 3809 __ fistp_d(frame_map()->address_for_slot(dest->double_stack_ix())); 3810 } else if (dest->is_address()) { 3811 __ fistp_d(as_Address(dest->as_address_ptr())); 3812 } else { 3813 ShouldNotReachHere(); 3814 } 3815 3816 } else if (dest->is_double_fpu()) { 3817 assert(dest->fpu_regnrLo() == 0, "must be TOS"); 3818 if (src->is_double_stack()) { 3819 __ fild_d(frame_map()->address_for_slot(src->double_stack_ix())); 3820 } else if (src->is_address()) { 3821 __ fild_d(as_Address(src->as_address_ptr())); 3822 } else { 3823 ShouldNotReachHere(); 3824 } 3825 } else { 3826 ShouldNotReachHere(); 3827 } 3828 } 3829 3830 #ifdef ASSERT 3831 // emit run-time assertion 3832 void LIR_Assembler::emit_assert(LIR_OpAssert* op) { 3833 assert(op->code() == lir_assert, "must be"); 3834 3835 if (op->in_opr1()->is_valid()) { 3836 assert(op->in_opr2()->is_valid(), "both operands must be valid"); 3837 comp_op(op->condition(), op->in_opr1(), op->in_opr2(), op); 3838 } else { 3839 assert(op->in_opr2()->is_illegal(), "both operands must be illegal"); 3840 assert(op->condition() == lir_cond_always, "no other conditions allowed"); 3841 } 3842 3843 Label ok; 3844 if (op->condition() != lir_cond_always) { 3845 Assembler::Condition acond = Assembler::zero; 3846 switch (op->condition()) { 3847 case lir_cond_equal: acond = Assembler::equal; break; 3848 case lir_cond_notEqual: acond = Assembler::notEqual; break; 3849 case lir_cond_less: acond = Assembler::less; break; 3850 case lir_cond_lessEqual: acond = Assembler::lessEqual; break; 3851 case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break; 3852 case lir_cond_greater: acond = Assembler::greater; break; 3853 case lir_cond_belowEqual: acond = Assembler::belowEqual; break; 3854 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; break; 3855 default: ShouldNotReachHere(); 3856 } 3857 __ jcc(acond, ok); 3858 } 3859 if (op->halt()) { 3860 const char* str = __ code_string(op->msg()); 3861 __ stop(str); 3862 } else { 3863 breakpoint(); 3864 } 3865 __ bind(ok); 3866 } 3867 #endif 3868 3869 void LIR_Assembler::membar() { 3870 // QQQ sparc TSO uses this, 3871 __ membar( Assembler::Membar_mask_bits(Assembler::StoreLoad)); 3872 } 3873 3874 void LIR_Assembler::membar_acquire() { 3875 // No x86 machines currently require load fences 3876 } 3877 3878 void LIR_Assembler::membar_release() { 3879 // No x86 machines currently require store fences 3880 } 3881 3882 void LIR_Assembler::membar_loadload() { 3883 // no-op 3884 //__ membar(Assembler::Membar_mask_bits(Assembler::loadload)); 3885 } 3886 3887 void LIR_Assembler::membar_storestore() { 3888 // no-op 3889 //__ membar(Assembler::Membar_mask_bits(Assembler::storestore)); 3890 } 3891 3892 void LIR_Assembler::membar_loadstore() { 3893 // no-op 3894 //__ membar(Assembler::Membar_mask_bits(Assembler::loadstore)); 3895 } 3896 3897 void LIR_Assembler::membar_storeload() { 3898 __ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad)); 3899 } 3900 3901 void LIR_Assembler::on_spin_wait() { 3902 __ pause (); 3903 } 3904 3905 void LIR_Assembler::get_thread(LIR_Opr result_reg) { 3906 assert(result_reg->is_register(), "check"); 3907 #ifdef _LP64 3908 // __ get_thread(result_reg->as_register_lo()); 3909 __ mov(result_reg->as_register(), r15_thread); 3910 #else 3911 __ get_thread(result_reg->as_register()); 3912 #endif // _LP64 3913 } 3914 3915 3916 void LIR_Assembler::peephole(LIR_List*) { 3917 // do nothing for now 3918 } 3919 3920 void LIR_Assembler::atomic_op(LIR_Code code, LIR_Opr src, LIR_Opr data, LIR_Opr dest, LIR_Opr tmp) { 3921 assert(data == dest, "xchg/xadd uses only 2 operands"); 3922 3923 if (data->type() == T_INT) { 3924 if (code == lir_xadd) { 3925 if (os::is_MP()) { 3926 __ lock(); 3927 } 3928 __ xaddl(as_Address(src->as_address_ptr()), data->as_register()); 3929 } else { 3930 __ xchgl(data->as_register(), as_Address(src->as_address_ptr())); 3931 } 3932 } else if (data->is_oop()) { 3933 assert (code == lir_xchg, "xadd for oops"); 3934 Register obj = data->as_register(); 3935 #ifdef _LP64 3936 if (UseCompressedOops) { 3937 __ encode_heap_oop(obj); 3938 __ xchgl(obj, as_Address(src->as_address_ptr())); 3939 __ decode_heap_oop(obj); 3940 } else { 3941 __ xchgptr(obj, as_Address(src->as_address_ptr())); 3942 } 3943 #else 3944 __ xchgl(obj, as_Address(src->as_address_ptr())); 3945 #endif 3946 } else if (data->type() == T_LONG) { 3947 #ifdef _LP64 3948 assert(data->as_register_lo() == data->as_register_hi(), "should be a single register"); 3949 if (code == lir_xadd) { 3950 if (os::is_MP()) { 3951 __ lock(); 3952 } 3953 __ xaddq(as_Address(src->as_address_ptr()), data->as_register_lo()); 3954 } else { 3955 __ xchgq(data->as_register_lo(), as_Address(src->as_address_ptr())); 3956 } 3957 #else 3958 ShouldNotReachHere(); 3959 #endif 3960 } else { 3961 ShouldNotReachHere(); 3962 } 3963 } 3964 3965 #undef __