1 /* 2 * Copyright (c) 2000, 2018, 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/cardTableBarrierSet.hpp" 37 #include "gc/shared/collectedHeap.hpp" 38 #include "nativeInst_x86.hpp" 39 #include "oops/objArrayKlass.hpp" 40 #include "runtime/frame.inline.hpp" 41 #include "runtime/safepointMechanism.hpp" 42 #include "runtime/sharedRuntime.hpp" 43 #include "vmreg_x86.inline.hpp" 44 45 46 // These masks are used to provide 128-bit aligned bitmasks to the XMM 47 // instructions, to allow sign-masking or sign-bit flipping. They allow 48 // fast versions of NegF/NegD and AbsF/AbsD. 49 50 // Note: 'double' and 'long long' have 32-bits alignment on x86. 51 static jlong* double_quadword(jlong *adr, jlong lo, jlong hi) { 52 // Use the expression (adr)&(~0xF) to provide 128-bits aligned address 53 // of 128-bits operands for SSE instructions. 54 jlong *operand = (jlong*)(((intptr_t)adr) & ((intptr_t)(~0xF))); 55 // Store the value to a 128-bits operand. 56 operand[0] = lo; 57 operand[1] = hi; 58 return operand; 59 } 60 61 // Buffer for 128-bits masks used by SSE instructions. 62 static jlong fp_signmask_pool[(4+1)*2]; // 4*128bits(data) + 128bits(alignment) 63 64 // Static initialization during VM startup. 65 static jlong *float_signmask_pool = double_quadword(&fp_signmask_pool[1*2], CONST64(0x7FFFFFFF7FFFFFFF), CONST64(0x7FFFFFFF7FFFFFFF)); 66 static jlong *double_signmask_pool = double_quadword(&fp_signmask_pool[2*2], CONST64(0x7FFFFFFFFFFFFFFF), CONST64(0x7FFFFFFFFFFFFFFF)); 67 static jlong *float_signflip_pool = double_quadword(&fp_signmask_pool[3*2], (jlong)UCONST64(0x8000000080000000), (jlong)UCONST64(0x8000000080000000)); 68 static jlong *double_signflip_pool = double_quadword(&fp_signmask_pool[4*2], (jlong)UCONST64(0x8000000000000000), (jlong)UCONST64(0x8000000000000000)); 69 70 71 NEEDS_CLEANUP // remove this definitions ? 72 const Register IC_Klass = rax; // where the IC klass is cached 73 const Register SYNC_header = rax; // synchronization header 74 const Register SHIFT_count = rcx; // where count for shift operations must be 75 76 #define __ _masm-> 77 78 79 static void select_different_registers(Register preserve, 80 Register extra, 81 Register &tmp1, 82 Register &tmp2) { 83 if (tmp1 == preserve) { 84 assert_different_registers(tmp1, tmp2, extra); 85 tmp1 = extra; 86 } else if (tmp2 == preserve) { 87 assert_different_registers(tmp1, tmp2, extra); 88 tmp2 = extra; 89 } 90 assert_different_registers(preserve, tmp1, tmp2); 91 } 92 93 94 95 static void select_different_registers(Register preserve, 96 Register extra, 97 Register &tmp1, 98 Register &tmp2, 99 Register &tmp3) { 100 if (tmp1 == preserve) { 101 assert_different_registers(tmp1, tmp2, tmp3, extra); 102 tmp1 = extra; 103 } else if (tmp2 == preserve) { 104 assert_different_registers(tmp1, tmp2, tmp3, extra); 105 tmp2 = extra; 106 } else if (tmp3 == preserve) { 107 assert_different_registers(tmp1, tmp2, tmp3, extra); 108 tmp3 = extra; 109 } 110 assert_different_registers(preserve, tmp1, tmp2, tmp3); 111 } 112 113 114 115 bool LIR_Assembler::is_small_constant(LIR_Opr opr) { 116 if (opr->is_constant()) { 117 LIR_Const* constant = opr->as_constant_ptr(); 118 switch (constant->type()) { 119 case T_INT: { 120 return true; 121 } 122 123 default: 124 return false; 125 } 126 } 127 return false; 128 } 129 130 131 LIR_Opr LIR_Assembler::receiverOpr() { 132 return FrameMap::receiver_opr; 133 } 134 135 LIR_Opr LIR_Assembler::osrBufferPointer() { 136 return FrameMap::as_pointer_opr(receiverOpr()->as_register()); 137 } 138 139 //--------------fpu register translations----------------------- 140 141 142 address LIR_Assembler::float_constant(float f) { 143 address const_addr = __ float_constant(f); 144 if (const_addr == NULL) { 145 bailout("const section overflow"); 146 return __ code()->consts()->start(); 147 } else { 148 return const_addr; 149 } 150 } 151 152 153 address LIR_Assembler::double_constant(double d) { 154 address const_addr = __ double_constant(d); 155 if (const_addr == NULL) { 156 bailout("const section overflow"); 157 return __ code()->consts()->start(); 158 } else { 159 return const_addr; 160 } 161 } 162 163 164 void LIR_Assembler::set_24bit_FPU() { 165 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_24())); 166 } 167 168 void LIR_Assembler::reset_FPU() { 169 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); 170 } 171 172 void LIR_Assembler::fpop() { 173 __ fpop(); 174 } 175 176 void LIR_Assembler::fxch(int i) { 177 __ fxch(i); 178 } 179 180 void LIR_Assembler::fld(int i) { 181 __ fld_s(i); 182 } 183 184 void LIR_Assembler::ffree(int i) { 185 __ ffree(i); 186 } 187 188 void LIR_Assembler::breakpoint() { 189 __ int3(); 190 } 191 192 void LIR_Assembler::push(LIR_Opr opr) { 193 if (opr->is_single_cpu()) { 194 __ push_reg(opr->as_register()); 195 } else if (opr->is_double_cpu()) { 196 NOT_LP64(__ push_reg(opr->as_register_hi())); 197 __ push_reg(opr->as_register_lo()); 198 } else if (opr->is_stack()) { 199 __ push_addr(frame_map()->address_for_slot(opr->single_stack_ix())); 200 } else if (opr->is_constant()) { 201 LIR_Const* const_opr = opr->as_constant_ptr(); 202 if (const_opr->type() == T_OBJECT || const_opr->type() == T_VALUETYPE) { 203 __ push_oop(const_opr->as_jobject()); 204 } else if (const_opr->type() == T_INT) { 205 __ push_jint(const_opr->as_jint()); 206 } else { 207 ShouldNotReachHere(); 208 } 209 210 } else { 211 ShouldNotReachHere(); 212 } 213 } 214 215 void LIR_Assembler::pop(LIR_Opr opr) { 216 if (opr->is_single_cpu()) { 217 __ pop_reg(opr->as_register()); 218 } else { 219 ShouldNotReachHere(); 220 } 221 } 222 223 bool LIR_Assembler::is_literal_address(LIR_Address* addr) { 224 return addr->base()->is_illegal() && addr->index()->is_illegal(); 225 } 226 227 //------------------------------------------- 228 229 Address LIR_Assembler::as_Address(LIR_Address* addr) { 230 return as_Address(addr, rscratch1); 231 } 232 233 Address LIR_Assembler::as_Address(LIR_Address* addr, Register tmp) { 234 if (addr->base()->is_illegal()) { 235 assert(addr->index()->is_illegal(), "must be illegal too"); 236 AddressLiteral laddr((address)addr->disp(), relocInfo::none); 237 if (! __ reachable(laddr)) { 238 __ movptr(tmp, laddr.addr()); 239 Address res(tmp, 0); 240 return res; 241 } else { 242 return __ as_Address(laddr); 243 } 244 } 245 246 Register base = addr->base()->as_pointer_register(); 247 248 if (addr->index()->is_illegal()) { 249 return Address( base, addr->disp()); 250 } else if (addr->index()->is_cpu_register()) { 251 Register index = addr->index()->as_pointer_register(); 252 return Address(base, index, (Address::ScaleFactor) addr->scale(), addr->disp()); 253 } else if (addr->index()->is_constant()) { 254 intptr_t addr_offset = (addr->index()->as_constant_ptr()->as_jint() << addr->scale()) + addr->disp(); 255 assert(Assembler::is_simm32(addr_offset), "must be"); 256 257 return Address(base, addr_offset); 258 } else { 259 Unimplemented(); 260 return Address(); 261 } 262 } 263 264 265 Address LIR_Assembler::as_Address_hi(LIR_Address* addr) { 266 Address base = as_Address(addr); 267 return Address(base._base, base._index, base._scale, base._disp + BytesPerWord); 268 } 269 270 271 Address LIR_Assembler::as_Address_lo(LIR_Address* addr) { 272 return as_Address(addr); 273 } 274 275 276 void LIR_Assembler::osr_entry() { 277 offsets()->set_value(CodeOffsets::OSR_Entry, code_offset()); 278 BlockBegin* osr_entry = compilation()->hir()->osr_entry(); 279 ValueStack* entry_state = osr_entry->state(); 280 int number_of_locks = entry_state->locks_size(); 281 282 // we jump here if osr happens with the interpreter 283 // state set up to continue at the beginning of the 284 // loop that triggered osr - in particular, we have 285 // the following registers setup: 286 // 287 // rcx: osr buffer 288 // 289 290 // build frame 291 ciMethod* m = compilation()->method(); 292 __ build_frame(initial_frame_size_in_bytes(), bang_size_in_bytes()); 293 294 // OSR buffer is 295 // 296 // locals[nlocals-1..0] 297 // monitors[0..number_of_locks] 298 // 299 // locals is a direct copy of the interpreter frame so in the osr buffer 300 // so first slot in the local array is the last local from the interpreter 301 // and last slot is local[0] (receiver) from the interpreter 302 // 303 // Similarly with locks. The first lock slot in the osr buffer is the nth lock 304 // from the interpreter frame, the nth lock slot in the osr buffer is 0th lock 305 // in the interpreter frame (the method lock if a sync method) 306 307 // Initialize monitors in the compiled activation. 308 // rcx: pointer to osr buffer 309 // 310 // All other registers are dead at this point and the locals will be 311 // copied into place by code emitted in the IR. 312 313 Register OSR_buf = osrBufferPointer()->as_pointer_register(); 314 { assert(frame::interpreter_frame_monitor_size() == BasicObjectLock::size(), "adjust code below"); 315 int monitor_offset = BytesPerWord * method()->max_locals() + 316 (BasicObjectLock::size() * BytesPerWord) * (number_of_locks - 1); 317 // SharedRuntime::OSR_migration_begin() packs BasicObjectLocks in 318 // the OSR buffer using 2 word entries: first the lock and then 319 // the oop. 320 for (int i = 0; i < number_of_locks; i++) { 321 int slot_offset = monitor_offset - ((i * 2) * BytesPerWord); 322 #ifdef ASSERT 323 // verify the interpreter's monitor has a non-null object 324 { 325 Label L; 326 __ cmpptr(Address(OSR_buf, slot_offset + 1*BytesPerWord), (int32_t)NULL_WORD); 327 __ jcc(Assembler::notZero, L); 328 __ stop("locked object is NULL"); 329 __ bind(L); 330 } 331 #endif 332 __ movptr(rbx, Address(OSR_buf, slot_offset + 0)); 333 __ movptr(frame_map()->address_for_monitor_lock(i), rbx); 334 __ movptr(rbx, Address(OSR_buf, slot_offset + 1*BytesPerWord)); 335 __ movptr(frame_map()->address_for_monitor_object(i), rbx); 336 } 337 } 338 } 339 340 341 // inline cache check; done before the frame is built. 342 int LIR_Assembler::check_icache() { 343 Register receiver = FrameMap::receiver_opr->as_register(); 344 Register ic_klass = IC_Klass; 345 const int ic_cmp_size = LP64_ONLY(10) NOT_LP64(9); 346 const bool do_post_padding = VerifyOops || UseCompressedClassPointers; 347 if (!do_post_padding) { 348 // insert some nops so that the verified entry point is aligned on CodeEntryAlignment 349 __ align(CodeEntryAlignment, __ offset() + ic_cmp_size); 350 } 351 int offset = __ offset(); 352 __ inline_cache_check(receiver, IC_Klass); 353 assert(__ offset() % CodeEntryAlignment == 0 || do_post_padding, "alignment must be correct"); 354 if (do_post_padding) { 355 // force alignment after the cache check. 356 // It's been verified to be aligned if !VerifyOops 357 __ align(CodeEntryAlignment); 358 } 359 return offset; 360 } 361 362 363 void LIR_Assembler::jobject2reg_with_patching(Register reg, CodeEmitInfo* info) { 364 jobject o = NULL; 365 PatchingStub* patch = new PatchingStub(_masm, patching_id(info)); 366 __ movoop(reg, o); 367 patching_epilog(patch, lir_patch_normal, reg, info); 368 } 369 370 void LIR_Assembler::klass2reg_with_patching(Register reg, CodeEmitInfo* info) { 371 Metadata* o = NULL; 372 PatchingStub* patch = new PatchingStub(_masm, PatchingStub::load_klass_id); 373 __ mov_metadata(reg, o); 374 patching_epilog(patch, lir_patch_normal, reg, info); 375 } 376 377 // This specifies the rsp decrement needed to build the frame 378 int LIR_Assembler::initial_frame_size_in_bytes() const { 379 // if rounding, must let FrameMap know! 380 381 // The frame_map records size in slots (32bit word) 382 383 // subtract two words to account for return address and link 384 return (frame_map()->framesize() - (2*VMRegImpl::slots_per_word)) * VMRegImpl::stack_slot_size; 385 } 386 387 388 int LIR_Assembler::emit_exception_handler() { 389 // if the last instruction is a call (typically to do a throw which 390 // is coming at the end after block reordering) the return address 391 // must still point into the code area in order to avoid assertion 392 // failures when searching for the corresponding bci => add a nop 393 // (was bug 5/14/1999 - gri) 394 __ nop(); 395 396 // generate code for exception handler 397 address handler_base = __ start_a_stub(exception_handler_size()); 398 if (handler_base == NULL) { 399 // not enough space left for the handler 400 bailout("exception handler overflow"); 401 return -1; 402 } 403 404 int offset = code_offset(); 405 406 // the exception oop and pc are in rax, and rdx 407 // no other registers need to be preserved, so invalidate them 408 __ invalidate_registers(false, true, true, false, true, true); 409 410 // check that there is really an exception 411 __ verify_not_null_oop(rax); 412 413 // search an exception handler (rax: exception oop, rdx: throwing pc) 414 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::handle_exception_from_callee_id))); 415 __ should_not_reach_here(); 416 guarantee(code_offset() - offset <= exception_handler_size(), "overflow"); 417 __ end_a_stub(); 418 419 return offset; 420 } 421 422 423 // Emit the code to remove the frame from the stack in the exception 424 // unwind path. 425 int LIR_Assembler::emit_unwind_handler() { 426 #ifndef PRODUCT 427 if (CommentedAssembly) { 428 _masm->block_comment("Unwind handler"); 429 } 430 #endif 431 432 int offset = code_offset(); 433 434 // Fetch the exception from TLS and clear out exception related thread state 435 Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread); 436 NOT_LP64(__ get_thread(rsi)); 437 __ movptr(rax, Address(thread, JavaThread::exception_oop_offset())); 438 __ movptr(Address(thread, JavaThread::exception_oop_offset()), (intptr_t)NULL_WORD); 439 __ movptr(Address(thread, JavaThread::exception_pc_offset()), (intptr_t)NULL_WORD); 440 441 __ bind(_unwind_handler_entry); 442 __ verify_not_null_oop(rax); 443 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) { 444 __ mov(rbx, rax); // Preserve the exception (rbx is always callee-saved) 445 } 446 447 // Preform needed unlocking 448 MonitorExitStub* stub = NULL; 449 if (method()->is_synchronized()) { 450 monitor_address(0, FrameMap::rax_opr); 451 stub = new MonitorExitStub(FrameMap::rax_opr, true, 0); 452 __ unlock_object(rdi, rsi, rax, *stub->entry()); 453 __ bind(*stub->continuation()); 454 } 455 456 if (compilation()->env()->dtrace_method_probes()) { 457 #ifdef _LP64 458 __ mov(rdi, r15_thread); 459 __ mov_metadata(rsi, method()->constant_encoding()); 460 #else 461 __ get_thread(rax); 462 __ movptr(Address(rsp, 0), rax); 463 __ mov_metadata(Address(rsp, sizeof(void*)), method()->constant_encoding()); 464 #endif 465 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit))); 466 } 467 468 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) { 469 __ mov(rax, rbx); // Restore the exception 470 } 471 472 // remove the activation and dispatch to the unwind handler 473 __ remove_frame(initial_frame_size_in_bytes()); 474 __ jump(RuntimeAddress(Runtime1::entry_for(Runtime1::unwind_exception_id))); 475 476 // Emit the slow path assembly 477 if (stub != NULL) { 478 stub->emit_code(this); 479 } 480 481 return offset; 482 } 483 484 485 int LIR_Assembler::emit_deopt_handler() { 486 // if the last instruction is a call (typically to do a throw which 487 // is coming at the end after block reordering) the return address 488 // must still point into the code area in order to avoid assertion 489 // failures when searching for the corresponding bci => add a nop 490 // (was bug 5/14/1999 - gri) 491 __ nop(); 492 493 // generate code for exception handler 494 address handler_base = __ start_a_stub(deopt_handler_size()); 495 if (handler_base == NULL) { 496 // not enough space left for the handler 497 bailout("deopt handler overflow"); 498 return -1; 499 } 500 501 int offset = code_offset(); 502 InternalAddress here(__ pc()); 503 504 __ pushptr(here.addr()); 505 __ jump(RuntimeAddress(SharedRuntime::deopt_blob()->unpack())); 506 guarantee(code_offset() - offset <= deopt_handler_size(), "overflow"); 507 __ end_a_stub(); 508 509 return offset; 510 } 511 512 513 void LIR_Assembler::return_op(LIR_Opr result) { 514 assert(result->is_illegal() || !result->is_single_cpu() || result->as_register() == rax, "word returns are in rax,"); 515 if (!result->is_illegal() && result->is_float_kind() && !result->is_xmm_register()) { 516 assert(result->fpu() == 0, "result must already be on TOS"); 517 } 518 519 // Pop the stack before the safepoint code 520 __ remove_frame(initial_frame_size_in_bytes()); 521 522 if (StackReservedPages > 0 && compilation()->has_reserved_stack_access()) { 523 __ reserved_stack_check(); 524 } 525 526 bool result_is_oop = result->is_valid() ? result->is_oop() : false; 527 528 // Note: we do not need to round double result; float result has the right precision 529 // the poll sets the condition code, but no data registers 530 531 if (SafepointMechanism::uses_thread_local_poll()) { 532 #ifdef _LP64 533 const Register poll_addr = rscratch1; 534 __ movptr(poll_addr, Address(r15_thread, Thread::polling_page_offset())); 535 #else 536 const Register poll_addr = rbx; 537 assert(FrameMap::is_caller_save_register(poll_addr), "will overwrite"); 538 __ get_thread(poll_addr); 539 __ movptr(poll_addr, Address(poll_addr, Thread::polling_page_offset())); 540 #endif 541 __ relocate(relocInfo::poll_return_type); 542 __ testl(rax, Address(poll_addr, 0)); 543 } else { 544 AddressLiteral polling_page(os::get_polling_page(), relocInfo::poll_return_type); 545 546 if (Assembler::is_polling_page_far()) { 547 __ lea(rscratch1, polling_page); 548 __ relocate(relocInfo::poll_return_type); 549 __ testl(rax, Address(rscratch1, 0)); 550 } else { 551 __ testl(rax, polling_page); 552 } 553 } 554 __ ret(0); 555 } 556 557 558 int LIR_Assembler::safepoint_poll(LIR_Opr tmp, CodeEmitInfo* info) { 559 guarantee(info != NULL, "Shouldn't be NULL"); 560 int offset = __ offset(); 561 if (SafepointMechanism::uses_thread_local_poll()) { 562 #ifdef _LP64 563 const Register poll_addr = rscratch1; 564 __ movptr(poll_addr, Address(r15_thread, Thread::polling_page_offset())); 565 #else 566 assert(tmp->is_cpu_register(), "needed"); 567 const Register poll_addr = tmp->as_register(); 568 __ get_thread(poll_addr); 569 __ movptr(poll_addr, Address(poll_addr, in_bytes(Thread::polling_page_offset()))); 570 #endif 571 add_debug_info_for_branch(info); 572 __ relocate(relocInfo::poll_type); 573 address pre_pc = __ pc(); 574 __ testl(rax, Address(poll_addr, 0)); 575 address post_pc = __ pc(); 576 guarantee(pointer_delta(post_pc, pre_pc, 1) == 2 LP64_ONLY(+1), "must be exact length"); 577 } else { 578 AddressLiteral polling_page(os::get_polling_page(), relocInfo::poll_type); 579 if (Assembler::is_polling_page_far()) { 580 __ lea(rscratch1, polling_page); 581 offset = __ offset(); 582 add_debug_info_for_branch(info); 583 __ relocate(relocInfo::poll_type); 584 __ testl(rax, Address(rscratch1, 0)); 585 } else { 586 add_debug_info_for_branch(info); 587 __ testl(rax, polling_page); 588 } 589 } 590 return offset; 591 } 592 593 594 void LIR_Assembler::move_regs(Register from_reg, Register to_reg) { 595 if (from_reg != to_reg) __ mov(to_reg, from_reg); 596 } 597 598 void LIR_Assembler::swap_reg(Register a, Register b) { 599 __ xchgptr(a, b); 600 } 601 602 603 void LIR_Assembler::const2reg(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) { 604 assert(src->is_constant(), "should not call otherwise"); 605 assert(dest->is_register(), "should not call otherwise"); 606 LIR_Const* c = src->as_constant_ptr(); 607 608 switch (c->type()) { 609 case T_INT: { 610 assert(patch_code == lir_patch_none, "no patching handled here"); 611 __ movl(dest->as_register(), c->as_jint()); 612 break; 613 } 614 615 case T_ADDRESS: { 616 assert(patch_code == lir_patch_none, "no patching handled here"); 617 __ movptr(dest->as_register(), c->as_jint()); 618 break; 619 } 620 621 case T_LONG: { 622 assert(patch_code == lir_patch_none, "no patching handled here"); 623 #ifdef _LP64 624 __ movptr(dest->as_register_lo(), (intptr_t)c->as_jlong()); 625 #else 626 __ movptr(dest->as_register_lo(), c->as_jint_lo()); 627 __ movptr(dest->as_register_hi(), c->as_jint_hi()); 628 #endif // _LP64 629 break; 630 } 631 632 case T_VALUETYPE: // Fall through 633 case T_OBJECT: { 634 if (patch_code != lir_patch_none) { 635 jobject2reg_with_patching(dest->as_register(), info); 636 } else { 637 __ movoop(dest->as_register(), c->as_jobject()); 638 } 639 break; 640 } 641 642 case T_METADATA: { 643 if (patch_code != lir_patch_none) { 644 klass2reg_with_patching(dest->as_register(), info); 645 } else { 646 __ mov_metadata(dest->as_register(), c->as_metadata()); 647 } 648 break; 649 } 650 651 case T_FLOAT: { 652 if (dest->is_single_xmm()) { 653 if (LP64_ONLY(UseAVX < 2 &&) c->is_zero_float()) { 654 __ xorps(dest->as_xmm_float_reg(), dest->as_xmm_float_reg()); 655 } else { 656 __ movflt(dest->as_xmm_float_reg(), 657 InternalAddress(float_constant(c->as_jfloat()))); 658 } 659 } else { 660 assert(dest->is_single_fpu(), "must be"); 661 assert(dest->fpu_regnr() == 0, "dest must be TOS"); 662 if (c->is_zero_float()) { 663 __ fldz(); 664 } else if (c->is_one_float()) { 665 __ fld1(); 666 } else { 667 __ fld_s (InternalAddress(float_constant(c->as_jfloat()))); 668 } 669 } 670 break; 671 } 672 673 case T_DOUBLE: { 674 if (dest->is_double_xmm()) { 675 if (LP64_ONLY(UseAVX < 2 &&) c->is_zero_double()) { 676 __ xorpd(dest->as_xmm_double_reg(), dest->as_xmm_double_reg()); 677 } else { 678 __ movdbl(dest->as_xmm_double_reg(), 679 InternalAddress(double_constant(c->as_jdouble()))); 680 } 681 } else { 682 assert(dest->is_double_fpu(), "must be"); 683 assert(dest->fpu_regnrLo() == 0, "dest must be TOS"); 684 if (c->is_zero_double()) { 685 __ fldz(); 686 } else if (c->is_one_double()) { 687 __ fld1(); 688 } else { 689 __ fld_d (InternalAddress(double_constant(c->as_jdouble()))); 690 } 691 } 692 break; 693 } 694 695 default: 696 ShouldNotReachHere(); 697 } 698 } 699 700 void LIR_Assembler::const2stack(LIR_Opr src, LIR_Opr dest) { 701 assert(src->is_constant(), "should not call otherwise"); 702 assert(dest->is_stack(), "should not call otherwise"); 703 LIR_Const* c = src->as_constant_ptr(); 704 705 switch (c->type()) { 706 case T_INT: // fall through 707 case T_FLOAT: 708 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits()); 709 break; 710 711 case T_ADDRESS: 712 __ movptr(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits()); 713 break; 714 715 case T_VALUETYPE: // Fall through 716 case T_OBJECT: 717 __ movoop(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jobject()); 718 break; 719 720 case T_LONG: // fall through 721 case T_DOUBLE: 722 #ifdef _LP64 723 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(), 724 lo_word_offset_in_bytes), (intptr_t)c->as_jlong_bits()); 725 #else 726 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(), 727 lo_word_offset_in_bytes), c->as_jint_lo_bits()); 728 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(), 729 hi_word_offset_in_bytes), c->as_jint_hi_bits()); 730 #endif // _LP64 731 break; 732 733 default: 734 ShouldNotReachHere(); 735 } 736 } 737 738 void LIR_Assembler::const2mem(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info, bool wide) { 739 assert(src->is_constant(), "should not call otherwise"); 740 assert(dest->is_address(), "should not call otherwise"); 741 LIR_Const* c = src->as_constant_ptr(); 742 LIR_Address* addr = dest->as_address_ptr(); 743 744 int null_check_here = code_offset(); 745 switch (type) { 746 case T_INT: // fall through 747 case T_FLOAT: 748 __ movl(as_Address(addr), c->as_jint_bits()); 749 break; 750 751 case T_ADDRESS: 752 __ movptr(as_Address(addr), c->as_jint_bits()); 753 break; 754 755 case T_VALUETYPE: // fall through 756 case T_OBJECT: // fall through 757 case T_ARRAY: 758 if (c->as_jobject() == NULL) { 759 if (UseCompressedOops && !wide) { 760 __ movl(as_Address(addr), (int32_t)NULL_WORD); 761 } else { 762 #ifdef _LP64 763 __ xorptr(rscratch1, rscratch1); 764 null_check_here = code_offset(); 765 __ movptr(as_Address(addr), rscratch1); 766 #else 767 __ movptr(as_Address(addr), NULL_WORD); 768 #endif 769 } 770 } else { 771 if (is_literal_address(addr)) { 772 ShouldNotReachHere(); 773 __ movoop(as_Address(addr, noreg), c->as_jobject()); 774 } else { 775 #ifdef _LP64 776 __ movoop(rscratch1, c->as_jobject()); 777 if (UseCompressedOops && !wide) { 778 __ encode_heap_oop(rscratch1); 779 null_check_here = code_offset(); 780 __ movl(as_Address_lo(addr), rscratch1); 781 } else { 782 null_check_here = code_offset(); 783 __ movptr(as_Address_lo(addr), rscratch1); 784 } 785 #else 786 __ movoop(as_Address(addr), c->as_jobject()); 787 #endif 788 } 789 } 790 break; 791 792 case T_LONG: // fall through 793 case T_DOUBLE: 794 #ifdef _LP64 795 if (is_literal_address(addr)) { 796 ShouldNotReachHere(); 797 __ movptr(as_Address(addr, r15_thread), (intptr_t)c->as_jlong_bits()); 798 } else { 799 __ movptr(r10, (intptr_t)c->as_jlong_bits()); 800 null_check_here = code_offset(); 801 __ movptr(as_Address_lo(addr), r10); 802 } 803 #else 804 // Always reachable in 32bit so this doesn't produce useless move literal 805 __ movptr(as_Address_hi(addr), c->as_jint_hi_bits()); 806 __ movptr(as_Address_lo(addr), c->as_jint_lo_bits()); 807 #endif // _LP64 808 break; 809 810 case T_BOOLEAN: // fall through 811 case T_BYTE: 812 __ movb(as_Address(addr), c->as_jint() & 0xFF); 813 break; 814 815 case T_CHAR: // fall through 816 case T_SHORT: 817 __ movw(as_Address(addr), c->as_jint() & 0xFFFF); 818 break; 819 820 default: 821 ShouldNotReachHere(); 822 }; 823 824 if (info != NULL) { 825 add_debug_info_for_null_check(null_check_here, info); 826 } 827 } 828 829 830 void LIR_Assembler::reg2reg(LIR_Opr src, LIR_Opr dest) { 831 assert(src->is_register(), "should not call otherwise"); 832 assert(dest->is_register(), "should not call otherwise"); 833 834 // move between cpu-registers 835 if (dest->is_single_cpu()) { 836 #ifdef _LP64 837 if (src->type() == T_LONG) { 838 // Can do LONG -> OBJECT 839 move_regs(src->as_register_lo(), dest->as_register()); 840 return; 841 } 842 #endif 843 assert(src->is_single_cpu(), "must match"); 844 if (src->type() == T_OBJECT || src->type() == T_VALUETYPE) { 845 __ verify_oop(src->as_register()); 846 } 847 move_regs(src->as_register(), dest->as_register()); 848 849 } else if (dest->is_double_cpu()) { 850 #ifdef _LP64 851 if (src->type() == T_OBJECT || src->type() == T_ARRAY || src->type() == T_VALUETYPE) { 852 // Surprising to me but we can see move of a long to t_object 853 __ verify_oop(src->as_register()); 854 move_regs(src->as_register(), dest->as_register_lo()); 855 return; 856 } 857 #endif 858 assert(src->is_double_cpu(), "must match"); 859 Register f_lo = src->as_register_lo(); 860 Register f_hi = src->as_register_hi(); 861 Register t_lo = dest->as_register_lo(); 862 Register t_hi = dest->as_register_hi(); 863 #ifdef _LP64 864 assert(f_hi == f_lo, "must be same"); 865 assert(t_hi == t_lo, "must be same"); 866 move_regs(f_lo, t_lo); 867 #else 868 assert(f_lo != f_hi && t_lo != t_hi, "invalid register allocation"); 869 870 871 if (f_lo == t_hi && f_hi == t_lo) { 872 swap_reg(f_lo, f_hi); 873 } else if (f_hi == t_lo) { 874 assert(f_lo != t_hi, "overwriting register"); 875 move_regs(f_hi, t_hi); 876 move_regs(f_lo, t_lo); 877 } else { 878 assert(f_hi != t_lo, "overwriting register"); 879 move_regs(f_lo, t_lo); 880 move_regs(f_hi, t_hi); 881 } 882 #endif // LP64 883 884 // special moves from fpu-register to xmm-register 885 // necessary for method results 886 } else if (src->is_single_xmm() && !dest->is_single_xmm()) { 887 __ movflt(Address(rsp, 0), src->as_xmm_float_reg()); 888 __ fld_s(Address(rsp, 0)); 889 } else if (src->is_double_xmm() && !dest->is_double_xmm()) { 890 __ movdbl(Address(rsp, 0), src->as_xmm_double_reg()); 891 __ fld_d(Address(rsp, 0)); 892 } else if (dest->is_single_xmm() && !src->is_single_xmm()) { 893 __ fstp_s(Address(rsp, 0)); 894 __ movflt(dest->as_xmm_float_reg(), Address(rsp, 0)); 895 } else if (dest->is_double_xmm() && !src->is_double_xmm()) { 896 __ fstp_d(Address(rsp, 0)); 897 __ movdbl(dest->as_xmm_double_reg(), Address(rsp, 0)); 898 899 // move between xmm-registers 900 } else if (dest->is_single_xmm()) { 901 assert(src->is_single_xmm(), "must match"); 902 __ movflt(dest->as_xmm_float_reg(), src->as_xmm_float_reg()); 903 } else if (dest->is_double_xmm()) { 904 assert(src->is_double_xmm(), "must match"); 905 __ movdbl(dest->as_xmm_double_reg(), src->as_xmm_double_reg()); 906 907 // move between fpu-registers (no instruction necessary because of fpu-stack) 908 } else if (dest->is_single_fpu() || dest->is_double_fpu()) { 909 assert(src->is_single_fpu() || src->is_double_fpu(), "must match"); 910 assert(src->fpu() == dest->fpu(), "currently should be nothing to do"); 911 } else { 912 ShouldNotReachHere(); 913 } 914 } 915 916 void LIR_Assembler::reg2stack(LIR_Opr src, LIR_Opr dest, BasicType type, bool pop_fpu_stack) { 917 assert(src->is_register(), "should not call otherwise"); 918 assert(dest->is_stack(), "should not call otherwise"); 919 920 if (src->is_single_cpu()) { 921 Address dst = frame_map()->address_for_slot(dest->single_stack_ix()); 922 if (type == T_OBJECT || type == T_ARRAY || type == T_VALUETYPE) { 923 __ verify_oop(src->as_register()); 924 __ movptr (dst, src->as_register()); 925 } else if (type == T_METADATA) { 926 __ movptr (dst, src->as_register()); 927 } else { 928 __ movl (dst, src->as_register()); 929 } 930 931 } else if (src->is_double_cpu()) { 932 Address dstLO = frame_map()->address_for_slot(dest->double_stack_ix(), lo_word_offset_in_bytes); 933 Address dstHI = frame_map()->address_for_slot(dest->double_stack_ix(), hi_word_offset_in_bytes); 934 __ movptr (dstLO, src->as_register_lo()); 935 NOT_LP64(__ movptr (dstHI, src->as_register_hi())); 936 937 } else if (src->is_single_xmm()) { 938 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix()); 939 __ movflt(dst_addr, src->as_xmm_float_reg()); 940 941 } else if (src->is_double_xmm()) { 942 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix()); 943 __ movdbl(dst_addr, src->as_xmm_double_reg()); 944 945 } else if (src->is_single_fpu()) { 946 assert(src->fpu_regnr() == 0, "argument must be on TOS"); 947 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix()); 948 if (pop_fpu_stack) __ fstp_s (dst_addr); 949 else __ fst_s (dst_addr); 950 951 } else if (src->is_double_fpu()) { 952 assert(src->fpu_regnrLo() == 0, "argument must be on TOS"); 953 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix()); 954 if (pop_fpu_stack) __ fstp_d (dst_addr); 955 else __ fst_d (dst_addr); 956 957 } else { 958 ShouldNotReachHere(); 959 } 960 } 961 962 963 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 */) { 964 LIR_Address* to_addr = dest->as_address_ptr(); 965 PatchingStub* patch = NULL; 966 Register compressed_src = rscratch1; 967 968 if (type == T_ARRAY || type == T_OBJECT || type == T_VALUETYPE) { 969 __ verify_oop(src->as_register()); 970 #ifdef _LP64 971 if (UseCompressedOops && !wide) { 972 __ movptr(compressed_src, src->as_register()); 973 __ encode_heap_oop(compressed_src); 974 if (patch_code != lir_patch_none) { 975 info->oop_map()->set_narrowoop(compressed_src->as_VMReg()); 976 } 977 } 978 #endif 979 } 980 981 if (patch_code != lir_patch_none) { 982 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 983 Address toa = as_Address(to_addr); 984 assert(toa.disp() != 0, "must have"); 985 } 986 987 int null_check_here = code_offset(); 988 switch (type) { 989 case T_FLOAT: { 990 if (src->is_single_xmm()) { 991 __ movflt(as_Address(to_addr), src->as_xmm_float_reg()); 992 } else { 993 assert(src->is_single_fpu(), "must be"); 994 assert(src->fpu_regnr() == 0, "argument must be on TOS"); 995 if (pop_fpu_stack) __ fstp_s(as_Address(to_addr)); 996 else __ fst_s (as_Address(to_addr)); 997 } 998 break; 999 } 1000 1001 case T_DOUBLE: { 1002 if (src->is_double_xmm()) { 1003 __ movdbl(as_Address(to_addr), src->as_xmm_double_reg()); 1004 } else { 1005 assert(src->is_double_fpu(), "must be"); 1006 assert(src->fpu_regnrLo() == 0, "argument must be on TOS"); 1007 if (pop_fpu_stack) __ fstp_d(as_Address(to_addr)); 1008 else __ fst_d (as_Address(to_addr)); 1009 } 1010 break; 1011 } 1012 1013 case T_VALUETYPE: // fall through 1014 case T_ARRAY: // fall through 1015 case T_OBJECT: // fall through 1016 if (UseCompressedOops && !wide) { 1017 __ movl(as_Address(to_addr), compressed_src); 1018 } else { 1019 __ movptr(as_Address(to_addr), src->as_register()); 1020 } 1021 break; 1022 case T_METADATA: 1023 // We get here to store a method pointer to the stack to pass to 1024 // a dtrace runtime call. This can't work on 64 bit with 1025 // compressed klass ptrs: T_METADATA can be a compressed klass 1026 // ptr or a 64 bit method pointer. 1027 LP64_ONLY(ShouldNotReachHere()); 1028 __ movptr(as_Address(to_addr), src->as_register()); 1029 break; 1030 case T_ADDRESS: 1031 __ movptr(as_Address(to_addr), src->as_register()); 1032 break; 1033 case T_INT: 1034 __ movl(as_Address(to_addr), src->as_register()); 1035 break; 1036 1037 case T_LONG: { 1038 Register from_lo = src->as_register_lo(); 1039 Register from_hi = src->as_register_hi(); 1040 #ifdef _LP64 1041 __ movptr(as_Address_lo(to_addr), from_lo); 1042 #else 1043 Register base = to_addr->base()->as_register(); 1044 Register index = noreg; 1045 if (to_addr->index()->is_register()) { 1046 index = to_addr->index()->as_register(); 1047 } 1048 if (base == from_lo || index == from_lo) { 1049 assert(base != from_hi, "can't be"); 1050 assert(index == noreg || (index != base && index != from_hi), "can't handle this"); 1051 __ movl(as_Address_hi(to_addr), from_hi); 1052 if (patch != NULL) { 1053 patching_epilog(patch, lir_patch_high, base, info); 1054 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1055 patch_code = lir_patch_low; 1056 } 1057 __ movl(as_Address_lo(to_addr), from_lo); 1058 } else { 1059 assert(index == noreg || (index != base && index != from_lo), "can't handle this"); 1060 __ movl(as_Address_lo(to_addr), from_lo); 1061 if (patch != NULL) { 1062 patching_epilog(patch, lir_patch_low, base, info); 1063 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1064 patch_code = lir_patch_high; 1065 } 1066 __ movl(as_Address_hi(to_addr), from_hi); 1067 } 1068 #endif // _LP64 1069 break; 1070 } 1071 1072 case T_BYTE: // fall through 1073 case T_BOOLEAN: { 1074 Register src_reg = src->as_register(); 1075 Address dst_addr = as_Address(to_addr); 1076 assert(VM_Version::is_P6() || src_reg->has_byte_register(), "must use byte registers if not P6"); 1077 __ movb(dst_addr, src_reg); 1078 break; 1079 } 1080 1081 case T_CHAR: // fall through 1082 case T_SHORT: 1083 __ movw(as_Address(to_addr), src->as_register()); 1084 break; 1085 1086 default: 1087 ShouldNotReachHere(); 1088 } 1089 if (info != NULL) { 1090 add_debug_info_for_null_check(null_check_here, info); 1091 } 1092 1093 if (patch_code != lir_patch_none) { 1094 patching_epilog(patch, patch_code, to_addr->base()->as_register(), info); 1095 } 1096 } 1097 1098 1099 void LIR_Assembler::stack2reg(LIR_Opr src, LIR_Opr dest, BasicType type) { 1100 assert(src->is_stack(), "should not call otherwise"); 1101 assert(dest->is_register(), "should not call otherwise"); 1102 1103 if (dest->is_single_cpu()) { 1104 if (type == T_ARRAY || type == T_OBJECT || type == T_VALUETYPE) { 1105 __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix())); 1106 __ verify_oop(dest->as_register()); 1107 } else if (type == T_METADATA) { 1108 __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix())); 1109 } else { 1110 __ movl(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix())); 1111 } 1112 1113 } else if (dest->is_double_cpu()) { 1114 Address src_addr_LO = frame_map()->address_for_slot(src->double_stack_ix(), lo_word_offset_in_bytes); 1115 Address src_addr_HI = frame_map()->address_for_slot(src->double_stack_ix(), hi_word_offset_in_bytes); 1116 __ movptr(dest->as_register_lo(), src_addr_LO); 1117 NOT_LP64(__ movptr(dest->as_register_hi(), src_addr_HI)); 1118 1119 } else if (dest->is_single_xmm()) { 1120 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix()); 1121 __ movflt(dest->as_xmm_float_reg(), src_addr); 1122 1123 } else if (dest->is_double_xmm()) { 1124 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix()); 1125 __ movdbl(dest->as_xmm_double_reg(), src_addr); 1126 1127 } else if (dest->is_single_fpu()) { 1128 assert(dest->fpu_regnr() == 0, "dest must be TOS"); 1129 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix()); 1130 __ fld_s(src_addr); 1131 1132 } else if (dest->is_double_fpu()) { 1133 assert(dest->fpu_regnrLo() == 0, "dest must be TOS"); 1134 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix()); 1135 __ fld_d(src_addr); 1136 1137 } else { 1138 ShouldNotReachHere(); 1139 } 1140 } 1141 1142 1143 void LIR_Assembler::stack2stack(LIR_Opr src, LIR_Opr dest, BasicType type) { 1144 if (src->is_single_stack()) { 1145 if (type == T_OBJECT || type == T_ARRAY || type == T_VALUETYPE) { 1146 __ pushptr(frame_map()->address_for_slot(src ->single_stack_ix())); 1147 __ popptr (frame_map()->address_for_slot(dest->single_stack_ix())); 1148 } else { 1149 #ifndef _LP64 1150 __ pushl(frame_map()->address_for_slot(src ->single_stack_ix())); 1151 __ popl (frame_map()->address_for_slot(dest->single_stack_ix())); 1152 #else 1153 //no pushl on 64bits 1154 __ movl(rscratch1, frame_map()->address_for_slot(src ->single_stack_ix())); 1155 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), rscratch1); 1156 #endif 1157 } 1158 1159 } else if (src->is_double_stack()) { 1160 #ifdef _LP64 1161 __ pushptr(frame_map()->address_for_slot(src ->double_stack_ix())); 1162 __ popptr (frame_map()->address_for_slot(dest->double_stack_ix())); 1163 #else 1164 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 0)); 1165 // push and pop the part at src + wordSize, adding wordSize for the previous push 1166 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 2 * wordSize)); 1167 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 2 * wordSize)); 1168 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 0)); 1169 #endif // _LP64 1170 1171 } else { 1172 ShouldNotReachHere(); 1173 } 1174 } 1175 1176 1177 void LIR_Assembler::mem2reg(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool wide, bool /* unaligned */) { 1178 assert(src->is_address(), "should not call otherwise"); 1179 assert(dest->is_register(), "should not call otherwise"); 1180 1181 LIR_Address* addr = src->as_address_ptr(); 1182 Address from_addr = as_Address(addr); 1183 1184 if (addr->base()->type() == T_OBJECT || addr->base()->type() == T_VALUETYPE) { 1185 __ verify_oop(addr->base()->as_pointer_register()); 1186 } 1187 1188 switch (type) { 1189 case T_BOOLEAN: // fall through 1190 case T_BYTE: // fall through 1191 case T_CHAR: // fall through 1192 case T_SHORT: 1193 if (!VM_Version::is_P6() && !from_addr.uses(dest->as_register())) { 1194 // on pre P6 processors we may get partial register stalls 1195 // so blow away the value of to_rinfo before loading a 1196 // partial word into it. Do it here so that it precedes 1197 // the potential patch point below. 1198 __ xorptr(dest->as_register(), dest->as_register()); 1199 } 1200 break; 1201 default: 1202 break; 1203 } 1204 1205 PatchingStub* patch = NULL; 1206 if (patch_code != lir_patch_none) { 1207 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1208 assert(from_addr.disp() != 0, "must have"); 1209 } 1210 if (info != NULL) { 1211 add_debug_info_for_null_check_here(info); 1212 } 1213 1214 switch (type) { 1215 case T_FLOAT: { 1216 if (dest->is_single_xmm()) { 1217 __ movflt(dest->as_xmm_float_reg(), from_addr); 1218 } else { 1219 assert(dest->is_single_fpu(), "must be"); 1220 assert(dest->fpu_regnr() == 0, "dest must be TOS"); 1221 __ fld_s(from_addr); 1222 } 1223 break; 1224 } 1225 1226 case T_DOUBLE: { 1227 if (dest->is_double_xmm()) { 1228 __ movdbl(dest->as_xmm_double_reg(), from_addr); 1229 } else { 1230 assert(dest->is_double_fpu(), "must be"); 1231 assert(dest->fpu_regnrLo() == 0, "dest must be TOS"); 1232 __ fld_d(from_addr); 1233 } 1234 break; 1235 } 1236 1237 case T_VALUETYPE: // fall through 1238 case T_OBJECT: // fall through 1239 case T_ARRAY: // fall through 1240 if (UseCompressedOops && !wide) { 1241 __ movl(dest->as_register(), from_addr); 1242 } else { 1243 __ movptr(dest->as_register(), from_addr); 1244 } 1245 break; 1246 1247 case T_ADDRESS: 1248 if (UseCompressedClassPointers && addr->disp() == oopDesc::klass_offset_in_bytes()) { 1249 __ movl(dest->as_register(), from_addr); 1250 } else { 1251 __ movptr(dest->as_register(), from_addr); 1252 } 1253 break; 1254 case T_INT: 1255 __ movl(dest->as_register(), from_addr); 1256 break; 1257 1258 case T_LONG: { 1259 Register to_lo = dest->as_register_lo(); 1260 Register to_hi = dest->as_register_hi(); 1261 #ifdef _LP64 1262 __ movptr(to_lo, as_Address_lo(addr)); 1263 #else 1264 Register base = addr->base()->as_register(); 1265 Register index = noreg; 1266 if (addr->index()->is_register()) { 1267 index = addr->index()->as_register(); 1268 } 1269 if ((base == to_lo && index == to_hi) || 1270 (base == to_hi && index == to_lo)) { 1271 // addresses with 2 registers are only formed as a result of 1272 // array access so this code will never have to deal with 1273 // patches or null checks. 1274 assert(info == NULL && patch == NULL, "must be"); 1275 __ lea(to_hi, as_Address(addr)); 1276 __ movl(to_lo, Address(to_hi, 0)); 1277 __ movl(to_hi, Address(to_hi, BytesPerWord)); 1278 } else if (base == to_lo || index == to_lo) { 1279 assert(base != to_hi, "can't be"); 1280 assert(index == noreg || (index != base && index != to_hi), "can't handle this"); 1281 __ movl(to_hi, as_Address_hi(addr)); 1282 if (patch != NULL) { 1283 patching_epilog(patch, lir_patch_high, base, info); 1284 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1285 patch_code = lir_patch_low; 1286 } 1287 __ movl(to_lo, as_Address_lo(addr)); 1288 } else { 1289 assert(index == noreg || (index != base && index != to_lo), "can't handle this"); 1290 __ movl(to_lo, as_Address_lo(addr)); 1291 if (patch != NULL) { 1292 patching_epilog(patch, lir_patch_low, base, info); 1293 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1294 patch_code = lir_patch_high; 1295 } 1296 __ movl(to_hi, as_Address_hi(addr)); 1297 } 1298 #endif // _LP64 1299 break; 1300 } 1301 1302 case T_BOOLEAN: // fall through 1303 case T_BYTE: { 1304 Register dest_reg = dest->as_register(); 1305 assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6"); 1306 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) { 1307 __ movsbl(dest_reg, from_addr); 1308 } else { 1309 __ movb(dest_reg, from_addr); 1310 __ shll(dest_reg, 24); 1311 __ sarl(dest_reg, 24); 1312 } 1313 break; 1314 } 1315 1316 case T_CHAR: { 1317 Register dest_reg = dest->as_register(); 1318 assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6"); 1319 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) { 1320 __ movzwl(dest_reg, from_addr); 1321 } else { 1322 __ movw(dest_reg, from_addr); 1323 } 1324 break; 1325 } 1326 1327 case T_SHORT: { 1328 Register dest_reg = dest->as_register(); 1329 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) { 1330 __ movswl(dest_reg, from_addr); 1331 } else { 1332 __ movw(dest_reg, from_addr); 1333 __ shll(dest_reg, 16); 1334 __ sarl(dest_reg, 16); 1335 } 1336 break; 1337 } 1338 1339 default: 1340 ShouldNotReachHere(); 1341 } 1342 1343 if (patch != NULL) { 1344 patching_epilog(patch, patch_code, addr->base()->as_register(), info); 1345 } 1346 1347 if (type == T_ARRAY || type == T_OBJECT || type == T_VALUETYPE) { 1348 #ifdef _LP64 1349 if (UseCompressedOops && !wide) { 1350 __ decode_heap_oop(dest->as_register()); 1351 } 1352 #endif 1353 1354 // Load barrier has not yet been applied, so ZGC can't verify the oop here 1355 if (!UseZGC) { 1356 __ verify_oop(dest->as_register()); 1357 } 1358 } else if (type == T_ADDRESS && addr->disp() == oopDesc::klass_offset_in_bytes()) { 1359 #ifdef _LP64 1360 if (UseCompressedClassPointers) { 1361 __ decode_klass_not_null(dest->as_register()); 1362 } 1363 #endif 1364 } 1365 } 1366 1367 1368 NEEDS_CLEANUP; // This could be static? 1369 Address::ScaleFactor LIR_Assembler::array_element_size(BasicType type) const { 1370 int elem_size = type2aelembytes(type); 1371 switch (elem_size) { 1372 case 1: return Address::times_1; 1373 case 2: return Address::times_2; 1374 case 4: return Address::times_4; 1375 case 8: return Address::times_8; 1376 } 1377 ShouldNotReachHere(); 1378 return Address::no_scale; 1379 } 1380 1381 1382 void LIR_Assembler::emit_op3(LIR_Op3* op) { 1383 switch (op->code()) { 1384 case lir_idiv: 1385 case lir_irem: 1386 arithmetic_idiv(op->code(), 1387 op->in_opr1(), 1388 op->in_opr2(), 1389 op->in_opr3(), 1390 op->result_opr(), 1391 op->info()); 1392 break; 1393 case lir_fmad: 1394 __ fmad(op->result_opr()->as_xmm_double_reg(), 1395 op->in_opr1()->as_xmm_double_reg(), 1396 op->in_opr2()->as_xmm_double_reg(), 1397 op->in_opr3()->as_xmm_double_reg()); 1398 break; 1399 case lir_fmaf: 1400 __ fmaf(op->result_opr()->as_xmm_float_reg(), 1401 op->in_opr1()->as_xmm_float_reg(), 1402 op->in_opr2()->as_xmm_float_reg(), 1403 op->in_opr3()->as_xmm_float_reg()); 1404 break; 1405 default: ShouldNotReachHere(); break; 1406 } 1407 } 1408 1409 void LIR_Assembler::emit_opBranch(LIR_OpBranch* op) { 1410 #ifdef ASSERT 1411 assert(op->block() == NULL || op->block()->label() == op->label(), "wrong label"); 1412 if (op->block() != NULL) _branch_target_blocks.append(op->block()); 1413 if (op->ublock() != NULL) _branch_target_blocks.append(op->ublock()); 1414 #endif 1415 1416 if (op->cond() == lir_cond_always) { 1417 if (op->info() != NULL) add_debug_info_for_branch(op->info()); 1418 __ jmp (*(op->label())); 1419 } else { 1420 Assembler::Condition acond = Assembler::zero; 1421 if (op->code() == lir_cond_float_branch) { 1422 assert(op->ublock() != NULL, "must have unordered successor"); 1423 __ jcc(Assembler::parity, *(op->ublock()->label())); 1424 switch(op->cond()) { 1425 case lir_cond_equal: acond = Assembler::equal; break; 1426 case lir_cond_notEqual: acond = Assembler::notEqual; break; 1427 case lir_cond_less: acond = Assembler::below; break; 1428 case lir_cond_lessEqual: acond = Assembler::belowEqual; break; 1429 case lir_cond_greaterEqual: acond = Assembler::aboveEqual; break; 1430 case lir_cond_greater: acond = Assembler::above; break; 1431 default: ShouldNotReachHere(); 1432 } 1433 } else { 1434 switch (op->cond()) { 1435 case lir_cond_equal: acond = Assembler::equal; break; 1436 case lir_cond_notEqual: acond = Assembler::notEqual; break; 1437 case lir_cond_less: acond = Assembler::less; break; 1438 case lir_cond_lessEqual: acond = Assembler::lessEqual; break; 1439 case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break; 1440 case lir_cond_greater: acond = Assembler::greater; break; 1441 case lir_cond_belowEqual: acond = Assembler::belowEqual; break; 1442 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; break; 1443 default: ShouldNotReachHere(); 1444 } 1445 } 1446 __ jcc(acond,*(op->label())); 1447 } 1448 } 1449 1450 void LIR_Assembler::emit_opConvert(LIR_OpConvert* op) { 1451 LIR_Opr src = op->in_opr(); 1452 LIR_Opr dest = op->result_opr(); 1453 1454 switch (op->bytecode()) { 1455 case Bytecodes::_i2l: 1456 #ifdef _LP64 1457 __ movl2ptr(dest->as_register_lo(), src->as_register()); 1458 #else 1459 move_regs(src->as_register(), dest->as_register_lo()); 1460 move_regs(src->as_register(), dest->as_register_hi()); 1461 __ sarl(dest->as_register_hi(), 31); 1462 #endif // LP64 1463 break; 1464 1465 case Bytecodes::_l2i: 1466 #ifdef _LP64 1467 __ movl(dest->as_register(), src->as_register_lo()); 1468 #else 1469 move_regs(src->as_register_lo(), dest->as_register()); 1470 #endif 1471 break; 1472 1473 case Bytecodes::_i2b: 1474 move_regs(src->as_register(), dest->as_register()); 1475 __ sign_extend_byte(dest->as_register()); 1476 break; 1477 1478 case Bytecodes::_i2c: 1479 move_regs(src->as_register(), dest->as_register()); 1480 __ andl(dest->as_register(), 0xFFFF); 1481 break; 1482 1483 case Bytecodes::_i2s: 1484 move_regs(src->as_register(), dest->as_register()); 1485 __ sign_extend_short(dest->as_register()); 1486 break; 1487 1488 1489 case Bytecodes::_f2d: 1490 case Bytecodes::_d2f: 1491 if (dest->is_single_xmm()) { 1492 __ cvtsd2ss(dest->as_xmm_float_reg(), src->as_xmm_double_reg()); 1493 } else if (dest->is_double_xmm()) { 1494 __ cvtss2sd(dest->as_xmm_double_reg(), src->as_xmm_float_reg()); 1495 } else { 1496 assert(src->fpu() == dest->fpu(), "register must be equal"); 1497 // do nothing (float result is rounded later through spilling) 1498 } 1499 break; 1500 1501 case Bytecodes::_i2f: 1502 case Bytecodes::_i2d: 1503 if (dest->is_single_xmm()) { 1504 __ cvtsi2ssl(dest->as_xmm_float_reg(), src->as_register()); 1505 } else if (dest->is_double_xmm()) { 1506 __ cvtsi2sdl(dest->as_xmm_double_reg(), src->as_register()); 1507 } else { 1508 assert(dest->fpu() == 0, "result must be on TOS"); 1509 __ movl(Address(rsp, 0), src->as_register()); 1510 __ fild_s(Address(rsp, 0)); 1511 } 1512 break; 1513 1514 case Bytecodes::_f2i: 1515 case Bytecodes::_d2i: 1516 if (src->is_single_xmm()) { 1517 __ cvttss2sil(dest->as_register(), src->as_xmm_float_reg()); 1518 } else if (src->is_double_xmm()) { 1519 __ cvttsd2sil(dest->as_register(), src->as_xmm_double_reg()); 1520 } else { 1521 assert(src->fpu() == 0, "input must be on TOS"); 1522 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_trunc())); 1523 __ fist_s(Address(rsp, 0)); 1524 __ movl(dest->as_register(), Address(rsp, 0)); 1525 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); 1526 } 1527 1528 // IA32 conversion instructions do not match JLS for overflow, underflow and NaN -> fixup in stub 1529 assert(op->stub() != NULL, "stub required"); 1530 __ cmpl(dest->as_register(), 0x80000000); 1531 __ jcc(Assembler::equal, *op->stub()->entry()); 1532 __ bind(*op->stub()->continuation()); 1533 break; 1534 1535 case Bytecodes::_l2f: 1536 case Bytecodes::_l2d: 1537 assert(!dest->is_xmm_register(), "result in xmm register not supported (no SSE instruction present)"); 1538 assert(dest->fpu() == 0, "result must be on TOS"); 1539 1540 __ movptr(Address(rsp, 0), src->as_register_lo()); 1541 NOT_LP64(__ movl(Address(rsp, BytesPerWord), src->as_register_hi())); 1542 __ fild_d(Address(rsp, 0)); 1543 // float result is rounded later through spilling 1544 break; 1545 1546 case Bytecodes::_f2l: 1547 case Bytecodes::_d2l: 1548 assert(!src->is_xmm_register(), "input in xmm register not supported (no SSE instruction present)"); 1549 assert(src->fpu() == 0, "input must be on TOS"); 1550 assert(dest == FrameMap::long0_opr, "runtime stub places result in these registers"); 1551 1552 // instruction sequence too long to inline it here 1553 { 1554 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::fpu2long_stub_id))); 1555 } 1556 break; 1557 1558 default: ShouldNotReachHere(); 1559 } 1560 } 1561 1562 void LIR_Assembler::emit_alloc_obj(LIR_OpAllocObj* op) { 1563 if (op->init_check()) { 1564 add_debug_info_for_null_check_here(op->stub()->info()); 1565 __ cmpb(Address(op->klass()->as_register(), 1566 InstanceKlass::init_state_offset()), 1567 InstanceKlass::fully_initialized); 1568 __ jcc(Assembler::notEqual, *op->stub()->entry()); 1569 } 1570 __ allocate_object(op->obj()->as_register(), 1571 op->tmp1()->as_register(), 1572 op->tmp2()->as_register(), 1573 op->header_size(), 1574 op->object_size(), 1575 op->klass()->as_register(), 1576 *op->stub()->entry()); 1577 __ bind(*op->stub()->continuation()); 1578 } 1579 1580 void LIR_Assembler::emit_alloc_array(LIR_OpAllocArray* op) { 1581 Register len = op->len()->as_register(); 1582 LP64_ONLY( __ movslq(len, len); ) 1583 1584 if (UseSlowPath || op->type() == T_VALUETYPE || 1585 (!UseFastNewObjectArray && (op->type() == T_OBJECT || op->type() == T_ARRAY)) || 1586 (!UseFastNewTypeArray && (op->type() != T_OBJECT && op->type() != T_ARRAY))) { 1587 __ jmp(*op->stub()->entry()); 1588 } else { 1589 Register tmp1 = op->tmp1()->as_register(); 1590 Register tmp2 = op->tmp2()->as_register(); 1591 Register tmp3 = op->tmp3()->as_register(); 1592 if (len == tmp1) { 1593 tmp1 = tmp3; 1594 } else if (len == tmp2) { 1595 tmp2 = tmp3; 1596 } else if (len == tmp3) { 1597 // everything is ok 1598 } else { 1599 __ mov(tmp3, len); 1600 } 1601 __ allocate_array(op->obj()->as_register(), 1602 len, 1603 tmp1, 1604 tmp2, 1605 arrayOopDesc::header_size(op->type()), 1606 array_element_size(op->type()), 1607 op->klass()->as_register(), 1608 *op->stub()->entry()); 1609 } 1610 __ bind(*op->stub()->continuation()); 1611 } 1612 1613 void LIR_Assembler::type_profile_helper(Register mdo, 1614 ciMethodData *md, ciProfileData *data, 1615 Register recv, Label* update_done) { 1616 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) { 1617 Label next_test; 1618 // See if the receiver is receiver[n]. 1619 __ cmpptr(recv, Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i)))); 1620 __ jccb(Assembler::notEqual, next_test); 1621 Address data_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i))); 1622 __ addptr(data_addr, DataLayout::counter_increment); 1623 __ jmp(*update_done); 1624 __ bind(next_test); 1625 } 1626 1627 // Didn't find receiver; find next empty slot and fill it in 1628 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) { 1629 Label next_test; 1630 Address recv_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i))); 1631 __ cmpptr(recv_addr, (intptr_t)NULL_WORD); 1632 __ jccb(Assembler::notEqual, next_test); 1633 __ movptr(recv_addr, recv); 1634 __ movptr(Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i))), DataLayout::counter_increment); 1635 __ jmp(*update_done); 1636 __ bind(next_test); 1637 } 1638 } 1639 1640 void LIR_Assembler::emit_typecheck_helper(LIR_OpTypeCheck *op, Label* success, Label* failure, Label* obj_is_null) { 1641 // we always need a stub for the failure case. 1642 CodeStub* stub = op->stub(); 1643 Register obj = op->object()->as_register(); 1644 Register k_RInfo = op->tmp1()->as_register(); 1645 Register klass_RInfo = op->tmp2()->as_register(); 1646 Register dst = op->result_opr()->as_register(); 1647 ciKlass* k = op->klass(); 1648 Register Rtmp1 = noreg; 1649 1650 // check if it needs to be profiled 1651 ciMethodData* md = NULL; 1652 ciProfileData* data = NULL; 1653 1654 if (op->should_profile()) { 1655 ciMethod* method = op->profiled_method(); 1656 assert(method != NULL, "Should have method"); 1657 int bci = op->profiled_bci(); 1658 md = method->method_data_or_null(); 1659 assert(md != NULL, "Sanity"); 1660 data = md->bci_to_data(bci); 1661 assert(data != NULL, "need data for type check"); 1662 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check"); 1663 } 1664 Label profile_cast_success, profile_cast_failure; 1665 Label *success_target = op->should_profile() ? &profile_cast_success : success; 1666 Label *failure_target = op->should_profile() ? &profile_cast_failure : failure; 1667 1668 if (obj == k_RInfo) { 1669 k_RInfo = dst; 1670 } else if (obj == klass_RInfo) { 1671 klass_RInfo = dst; 1672 } 1673 if (k->is_loaded() && !UseCompressedClassPointers) { 1674 select_different_registers(obj, dst, k_RInfo, klass_RInfo); 1675 } else { 1676 Rtmp1 = op->tmp3()->as_register(); 1677 select_different_registers(obj, dst, k_RInfo, klass_RInfo, Rtmp1); 1678 } 1679 1680 assert_different_registers(obj, k_RInfo, klass_RInfo); 1681 1682 __ cmpptr(obj, (int32_t)NULL_WORD); 1683 if (op->should_profile()) { 1684 Label not_null; 1685 __ jccb(Assembler::notEqual, not_null); 1686 // Object is null; update MDO and exit 1687 Register mdo = klass_RInfo; 1688 __ mov_metadata(mdo, md->constant_encoding()); 1689 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::flags_offset())); 1690 int header_bits = BitData::null_seen_byte_constant(); 1691 __ orb(data_addr, header_bits); 1692 __ jmp(*obj_is_null); 1693 __ bind(not_null); 1694 } else { 1695 __ jcc(Assembler::equal, *obj_is_null); 1696 } 1697 1698 if (!k->is_loaded()) { 1699 klass2reg_with_patching(k_RInfo, op->info_for_patch()); 1700 } else { 1701 #ifdef _LP64 1702 __ mov_metadata(k_RInfo, k->constant_encoding()); 1703 #endif // _LP64 1704 } 1705 __ verify_oop(obj); 1706 1707 if (op->fast_check()) { 1708 // get object class 1709 // not a safepoint as obj null check happens earlier 1710 #ifdef _LP64 1711 if (UseCompressedClassPointers) { 1712 __ load_klass(Rtmp1, obj); 1713 __ cmpptr(k_RInfo, Rtmp1); 1714 } else { 1715 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes())); 1716 } 1717 #else 1718 if (k->is_loaded()) { 1719 __ cmpklass(Address(obj, oopDesc::klass_offset_in_bytes()), k->constant_encoding()); 1720 } else { 1721 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes())); 1722 } 1723 #endif 1724 __ jcc(Assembler::notEqual, *failure_target); 1725 // successful cast, fall through to profile or jump 1726 } else { 1727 // get object class 1728 // not a safepoint as obj null check happens earlier 1729 __ load_klass(klass_RInfo, obj); 1730 if (k->is_loaded()) { 1731 // See if we get an immediate positive hit 1732 #ifdef _LP64 1733 __ cmpptr(k_RInfo, Address(klass_RInfo, k->super_check_offset())); 1734 #else 1735 __ cmpklass(Address(klass_RInfo, k->super_check_offset()), k->constant_encoding()); 1736 #endif // _LP64 1737 if ((juint)in_bytes(Klass::secondary_super_cache_offset()) != k->super_check_offset()) { 1738 __ jcc(Assembler::notEqual, *failure_target); 1739 // successful cast, fall through to profile or jump 1740 } else { 1741 // See if we get an immediate positive hit 1742 __ jcc(Assembler::equal, *success_target); 1743 // check for self 1744 #ifdef _LP64 1745 __ cmpptr(klass_RInfo, k_RInfo); 1746 #else 1747 __ cmpklass(klass_RInfo, k->constant_encoding()); 1748 #endif // _LP64 1749 __ jcc(Assembler::equal, *success_target); 1750 1751 __ push(klass_RInfo); 1752 #ifdef _LP64 1753 __ push(k_RInfo); 1754 #else 1755 __ pushklass(k->constant_encoding()); 1756 #endif // _LP64 1757 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 1758 __ pop(klass_RInfo); 1759 __ pop(klass_RInfo); 1760 // result is a boolean 1761 __ cmpl(klass_RInfo, 0); 1762 __ jcc(Assembler::equal, *failure_target); 1763 // successful cast, fall through to profile or jump 1764 } 1765 } else { 1766 // perform the fast part of the checking logic 1767 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL); 1768 // call out-of-line instance of __ check_klass_subtype_slow_path(...): 1769 __ push(klass_RInfo); 1770 __ push(k_RInfo); 1771 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 1772 __ pop(klass_RInfo); 1773 __ pop(k_RInfo); 1774 // result is a boolean 1775 __ cmpl(k_RInfo, 0); 1776 __ jcc(Assembler::equal, *failure_target); 1777 // successful cast, fall through to profile or jump 1778 } 1779 } 1780 if (op->should_profile()) { 1781 Register mdo = klass_RInfo, recv = k_RInfo; 1782 __ bind(profile_cast_success); 1783 __ mov_metadata(mdo, md->constant_encoding()); 1784 __ load_klass(recv, obj); 1785 type_profile_helper(mdo, md, data, recv, success); 1786 __ jmp(*success); 1787 1788 __ bind(profile_cast_failure); 1789 __ mov_metadata(mdo, md->constant_encoding()); 1790 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset())); 1791 __ subptr(counter_addr, DataLayout::counter_increment); 1792 __ jmp(*failure); 1793 } 1794 __ jmp(*success); 1795 } 1796 1797 1798 void LIR_Assembler::emit_opTypeCheck(LIR_OpTypeCheck* op) { 1799 LIR_Code code = op->code(); 1800 if (code == lir_store_check) { 1801 Register value = op->object()->as_register(); 1802 Register array = op->array()->as_register(); 1803 Register k_RInfo = op->tmp1()->as_register(); 1804 Register klass_RInfo = op->tmp2()->as_register(); 1805 Register Rtmp1 = op->tmp3()->as_register(); 1806 1807 CodeStub* stub = op->stub(); 1808 1809 // check if it needs to be profiled 1810 ciMethodData* md = NULL; 1811 ciProfileData* data = NULL; 1812 1813 if (op->should_profile()) { 1814 ciMethod* method = op->profiled_method(); 1815 assert(method != NULL, "Should have method"); 1816 int bci = op->profiled_bci(); 1817 md = method->method_data_or_null(); 1818 assert(md != NULL, "Sanity"); 1819 data = md->bci_to_data(bci); 1820 assert(data != NULL, "need data for type check"); 1821 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check"); 1822 } 1823 Label profile_cast_success, profile_cast_failure, done; 1824 Label *success_target = op->should_profile() ? &profile_cast_success : &done; 1825 Label *failure_target = op->should_profile() ? &profile_cast_failure : stub->entry(); 1826 1827 __ cmpptr(value, (int32_t)NULL_WORD); 1828 if (op->should_profile()) { 1829 Label not_null; 1830 __ jccb(Assembler::notEqual, not_null); 1831 // Object is null; update MDO and exit 1832 Register mdo = klass_RInfo; 1833 __ mov_metadata(mdo, md->constant_encoding()); 1834 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::flags_offset())); 1835 int header_bits = BitData::null_seen_byte_constant(); 1836 __ orb(data_addr, header_bits); 1837 __ jmp(done); 1838 __ bind(not_null); 1839 } else { 1840 __ jcc(Assembler::equal, done); 1841 } 1842 1843 add_debug_info_for_null_check_here(op->info_for_exception()); 1844 __ load_klass(k_RInfo, array); 1845 __ load_klass(klass_RInfo, value); 1846 1847 // get instance klass (it's already uncompressed) 1848 __ movptr(k_RInfo, Address(k_RInfo, ObjArrayKlass::element_klass_offset())); 1849 // perform the fast part of the checking logic 1850 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL); 1851 // call out-of-line instance of __ check_klass_subtype_slow_path(...): 1852 __ push(klass_RInfo); 1853 __ push(k_RInfo); 1854 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 1855 __ pop(klass_RInfo); 1856 __ pop(k_RInfo); 1857 // result is a boolean 1858 __ cmpl(k_RInfo, 0); 1859 __ jcc(Assembler::equal, *failure_target); 1860 // fall through to the success case 1861 1862 if (op->should_profile()) { 1863 Register mdo = klass_RInfo, recv = k_RInfo; 1864 __ bind(profile_cast_success); 1865 __ mov_metadata(mdo, md->constant_encoding()); 1866 __ load_klass(recv, value); 1867 type_profile_helper(mdo, md, data, recv, &done); 1868 __ jmpb(done); 1869 1870 __ bind(profile_cast_failure); 1871 __ mov_metadata(mdo, md->constant_encoding()); 1872 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset())); 1873 __ subptr(counter_addr, DataLayout::counter_increment); 1874 __ jmp(*stub->entry()); 1875 } 1876 1877 __ bind(done); 1878 } else 1879 if (code == lir_checkcast) { 1880 Register obj = op->object()->as_register(); 1881 Register dst = op->result_opr()->as_register(); 1882 Label success; 1883 emit_typecheck_helper(op, &success, op->stub()->entry(), &success); 1884 __ bind(success); 1885 if (dst != obj) { 1886 __ mov(dst, obj); 1887 } 1888 } else 1889 if (code == lir_instanceof) { 1890 Register obj = op->object()->as_register(); 1891 Register dst = op->result_opr()->as_register(); 1892 Label success, failure, done; 1893 emit_typecheck_helper(op, &success, &failure, &failure); 1894 __ bind(failure); 1895 __ xorptr(dst, dst); 1896 __ jmpb(done); 1897 __ bind(success); 1898 __ movptr(dst, 1); 1899 __ bind(done); 1900 } else { 1901 ShouldNotReachHere(); 1902 } 1903 1904 } 1905 1906 1907 void LIR_Assembler::emit_compare_and_swap(LIR_OpCompareAndSwap* op) { 1908 if (LP64_ONLY(false &&) op->code() == lir_cas_long && VM_Version::supports_cx8()) { 1909 assert(op->cmp_value()->as_register_lo() == rax, "wrong register"); 1910 assert(op->cmp_value()->as_register_hi() == rdx, "wrong register"); 1911 assert(op->new_value()->as_register_lo() == rbx, "wrong register"); 1912 assert(op->new_value()->as_register_hi() == rcx, "wrong register"); 1913 Register addr = op->addr()->as_register(); 1914 __ lock(); 1915 NOT_LP64(__ cmpxchg8(Address(addr, 0))); 1916 1917 } else if (op->code() == lir_cas_int || op->code() == lir_cas_obj ) { 1918 NOT_LP64(assert(op->addr()->is_single_cpu(), "must be single");) 1919 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo()); 1920 Register newval = op->new_value()->as_register(); 1921 Register cmpval = op->cmp_value()->as_register(); 1922 assert(cmpval == rax, "wrong register"); 1923 assert(newval != NULL, "new val must be register"); 1924 assert(cmpval != newval, "cmp and new values must be in different registers"); 1925 assert(cmpval != addr, "cmp and addr must be in different registers"); 1926 assert(newval != addr, "new value and addr must be in different registers"); 1927 1928 if ( op->code() == lir_cas_obj) { 1929 #ifdef _LP64 1930 if (UseCompressedOops) { 1931 __ encode_heap_oop(cmpval); 1932 __ mov(rscratch1, newval); 1933 __ encode_heap_oop(rscratch1); 1934 __ lock(); 1935 // cmpval (rax) is implicitly used by this instruction 1936 __ cmpxchgl(rscratch1, Address(addr, 0)); 1937 } else 1938 #endif 1939 { 1940 __ lock(); 1941 __ cmpxchgptr(newval, Address(addr, 0)); 1942 } 1943 } else { 1944 assert(op->code() == lir_cas_int, "lir_cas_int expected"); 1945 __ lock(); 1946 __ cmpxchgl(newval, Address(addr, 0)); 1947 } 1948 #ifdef _LP64 1949 } else if (op->code() == lir_cas_long) { 1950 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo()); 1951 Register newval = op->new_value()->as_register_lo(); 1952 Register cmpval = op->cmp_value()->as_register_lo(); 1953 assert(cmpval == rax, "wrong register"); 1954 assert(newval != NULL, "new val must be register"); 1955 assert(cmpval != newval, "cmp and new values must be in different registers"); 1956 assert(cmpval != addr, "cmp and addr must be in different registers"); 1957 assert(newval != addr, "new value and addr must be in different registers"); 1958 __ lock(); 1959 __ cmpxchgq(newval, Address(addr, 0)); 1960 #endif // _LP64 1961 } else { 1962 Unimplemented(); 1963 } 1964 } 1965 1966 void LIR_Assembler::cmove(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result, BasicType type) { 1967 Assembler::Condition acond, ncond; 1968 switch (condition) { 1969 case lir_cond_equal: acond = Assembler::equal; ncond = Assembler::notEqual; break; 1970 case lir_cond_notEqual: acond = Assembler::notEqual; ncond = Assembler::equal; break; 1971 case lir_cond_less: acond = Assembler::less; ncond = Assembler::greaterEqual; break; 1972 case lir_cond_lessEqual: acond = Assembler::lessEqual; ncond = Assembler::greater; break; 1973 case lir_cond_greaterEqual: acond = Assembler::greaterEqual; ncond = Assembler::less; break; 1974 case lir_cond_greater: acond = Assembler::greater; ncond = Assembler::lessEqual; break; 1975 case lir_cond_belowEqual: acond = Assembler::belowEqual; ncond = Assembler::above; break; 1976 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; ncond = Assembler::below; break; 1977 default: acond = Assembler::equal; ncond = Assembler::notEqual; 1978 ShouldNotReachHere(); 1979 } 1980 1981 if (opr1->is_cpu_register()) { 1982 reg2reg(opr1, result); 1983 } else if (opr1->is_stack()) { 1984 stack2reg(opr1, result, result->type()); 1985 } else if (opr1->is_constant()) { 1986 const2reg(opr1, result, lir_patch_none, NULL); 1987 } else { 1988 ShouldNotReachHere(); 1989 } 1990 1991 if (VM_Version::supports_cmov() && !opr2->is_constant()) { 1992 // optimized version that does not require a branch 1993 if (opr2->is_single_cpu()) { 1994 assert(opr2->cpu_regnr() != result->cpu_regnr(), "opr2 already overwritten by previous move"); 1995 __ cmov(ncond, result->as_register(), opr2->as_register()); 1996 } else if (opr2->is_double_cpu()) { 1997 assert(opr2->cpu_regnrLo() != result->cpu_regnrLo() && opr2->cpu_regnrLo() != result->cpu_regnrHi(), "opr2 already overwritten by previous move"); 1998 assert(opr2->cpu_regnrHi() != result->cpu_regnrLo() && opr2->cpu_regnrHi() != result->cpu_regnrHi(), "opr2 already overwritten by previous move"); 1999 __ cmovptr(ncond, result->as_register_lo(), opr2->as_register_lo()); 2000 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), opr2->as_register_hi());) 2001 } else if (opr2->is_single_stack()) { 2002 __ cmovl(ncond, result->as_register(), frame_map()->address_for_slot(opr2->single_stack_ix())); 2003 } else if (opr2->is_double_stack()) { 2004 __ cmovptr(ncond, result->as_register_lo(), frame_map()->address_for_slot(opr2->double_stack_ix(), lo_word_offset_in_bytes)); 2005 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), frame_map()->address_for_slot(opr2->double_stack_ix(), hi_word_offset_in_bytes));) 2006 } else { 2007 ShouldNotReachHere(); 2008 } 2009 2010 } else { 2011 Label skip; 2012 __ jcc (acond, skip); 2013 if (opr2->is_cpu_register()) { 2014 reg2reg(opr2, result); 2015 } else if (opr2->is_stack()) { 2016 stack2reg(opr2, result, result->type()); 2017 } else if (opr2->is_constant()) { 2018 const2reg(opr2, result, lir_patch_none, NULL); 2019 } else { 2020 ShouldNotReachHere(); 2021 } 2022 __ bind(skip); 2023 } 2024 } 2025 2026 2027 void LIR_Assembler::arith_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dest, CodeEmitInfo* info, bool pop_fpu_stack) { 2028 assert(info == NULL, "should never be used, idiv/irem and ldiv/lrem not handled by this method"); 2029 2030 if (left->is_single_cpu()) { 2031 assert(left == dest, "left and dest must be equal"); 2032 Register lreg = left->as_register(); 2033 2034 if (right->is_single_cpu()) { 2035 // cpu register - cpu register 2036 Register rreg = right->as_register(); 2037 switch (code) { 2038 case lir_add: __ addl (lreg, rreg); break; 2039 case lir_sub: __ subl (lreg, rreg); break; 2040 case lir_mul: __ imull(lreg, rreg); break; 2041 default: ShouldNotReachHere(); 2042 } 2043 2044 } else if (right->is_stack()) { 2045 // cpu register - stack 2046 Address raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2047 switch (code) { 2048 case lir_add: __ addl(lreg, raddr); break; 2049 case lir_sub: __ subl(lreg, raddr); break; 2050 default: ShouldNotReachHere(); 2051 } 2052 2053 } else if (right->is_constant()) { 2054 // cpu register - constant 2055 jint c = right->as_constant_ptr()->as_jint(); 2056 switch (code) { 2057 case lir_add: { 2058 __ incrementl(lreg, c); 2059 break; 2060 } 2061 case lir_sub: { 2062 __ decrementl(lreg, c); 2063 break; 2064 } 2065 default: ShouldNotReachHere(); 2066 } 2067 2068 } else { 2069 ShouldNotReachHere(); 2070 } 2071 2072 } else if (left->is_double_cpu()) { 2073 assert(left == dest, "left and dest must be equal"); 2074 Register lreg_lo = left->as_register_lo(); 2075 Register lreg_hi = left->as_register_hi(); 2076 2077 if (right->is_double_cpu()) { 2078 // cpu register - cpu register 2079 Register rreg_lo = right->as_register_lo(); 2080 Register rreg_hi = right->as_register_hi(); 2081 NOT_LP64(assert_different_registers(lreg_lo, lreg_hi, rreg_lo, rreg_hi)); 2082 LP64_ONLY(assert_different_registers(lreg_lo, rreg_lo)); 2083 switch (code) { 2084 case lir_add: 2085 __ addptr(lreg_lo, rreg_lo); 2086 NOT_LP64(__ adcl(lreg_hi, rreg_hi)); 2087 break; 2088 case lir_sub: 2089 __ subptr(lreg_lo, rreg_lo); 2090 NOT_LP64(__ sbbl(lreg_hi, rreg_hi)); 2091 break; 2092 case lir_mul: 2093 #ifdef _LP64 2094 __ imulq(lreg_lo, rreg_lo); 2095 #else 2096 assert(lreg_lo == rax && lreg_hi == rdx, "must be"); 2097 __ imull(lreg_hi, rreg_lo); 2098 __ imull(rreg_hi, lreg_lo); 2099 __ addl (rreg_hi, lreg_hi); 2100 __ mull (rreg_lo); 2101 __ addl (lreg_hi, rreg_hi); 2102 #endif // _LP64 2103 break; 2104 default: 2105 ShouldNotReachHere(); 2106 } 2107 2108 } else if (right->is_constant()) { 2109 // cpu register - constant 2110 #ifdef _LP64 2111 jlong c = right->as_constant_ptr()->as_jlong_bits(); 2112 __ movptr(r10, (intptr_t) c); 2113 switch (code) { 2114 case lir_add: 2115 __ addptr(lreg_lo, r10); 2116 break; 2117 case lir_sub: 2118 __ subptr(lreg_lo, r10); 2119 break; 2120 default: 2121 ShouldNotReachHere(); 2122 } 2123 #else 2124 jint c_lo = right->as_constant_ptr()->as_jint_lo(); 2125 jint c_hi = right->as_constant_ptr()->as_jint_hi(); 2126 switch (code) { 2127 case lir_add: 2128 __ addptr(lreg_lo, c_lo); 2129 __ adcl(lreg_hi, c_hi); 2130 break; 2131 case lir_sub: 2132 __ subptr(lreg_lo, c_lo); 2133 __ sbbl(lreg_hi, c_hi); 2134 break; 2135 default: 2136 ShouldNotReachHere(); 2137 } 2138 #endif // _LP64 2139 2140 } else { 2141 ShouldNotReachHere(); 2142 } 2143 2144 } else if (left->is_single_xmm()) { 2145 assert(left == dest, "left and dest must be equal"); 2146 XMMRegister lreg = left->as_xmm_float_reg(); 2147 2148 if (right->is_single_xmm()) { 2149 XMMRegister rreg = right->as_xmm_float_reg(); 2150 switch (code) { 2151 case lir_add: __ addss(lreg, rreg); break; 2152 case lir_sub: __ subss(lreg, rreg); break; 2153 case lir_mul_strictfp: // fall through 2154 case lir_mul: __ mulss(lreg, rreg); break; 2155 case lir_div_strictfp: // fall through 2156 case lir_div: __ divss(lreg, rreg); break; 2157 default: ShouldNotReachHere(); 2158 } 2159 } else { 2160 Address raddr; 2161 if (right->is_single_stack()) { 2162 raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2163 } else if (right->is_constant()) { 2164 // hack for now 2165 raddr = __ as_Address(InternalAddress(float_constant(right->as_jfloat()))); 2166 } else { 2167 ShouldNotReachHere(); 2168 } 2169 switch (code) { 2170 case lir_add: __ addss(lreg, raddr); break; 2171 case lir_sub: __ subss(lreg, raddr); break; 2172 case lir_mul_strictfp: // fall through 2173 case lir_mul: __ mulss(lreg, raddr); break; 2174 case lir_div_strictfp: // fall through 2175 case lir_div: __ divss(lreg, raddr); break; 2176 default: ShouldNotReachHere(); 2177 } 2178 } 2179 2180 } else if (left->is_double_xmm()) { 2181 assert(left == dest, "left and dest must be equal"); 2182 2183 XMMRegister lreg = left->as_xmm_double_reg(); 2184 if (right->is_double_xmm()) { 2185 XMMRegister rreg = right->as_xmm_double_reg(); 2186 switch (code) { 2187 case lir_add: __ addsd(lreg, rreg); break; 2188 case lir_sub: __ subsd(lreg, rreg); break; 2189 case lir_mul_strictfp: // fall through 2190 case lir_mul: __ mulsd(lreg, rreg); break; 2191 case lir_div_strictfp: // fall through 2192 case lir_div: __ divsd(lreg, rreg); break; 2193 default: ShouldNotReachHere(); 2194 } 2195 } else { 2196 Address raddr; 2197 if (right->is_double_stack()) { 2198 raddr = frame_map()->address_for_slot(right->double_stack_ix()); 2199 } else if (right->is_constant()) { 2200 // hack for now 2201 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble()))); 2202 } else { 2203 ShouldNotReachHere(); 2204 } 2205 switch (code) { 2206 case lir_add: __ addsd(lreg, raddr); break; 2207 case lir_sub: __ subsd(lreg, raddr); break; 2208 case lir_mul_strictfp: // fall through 2209 case lir_mul: __ mulsd(lreg, raddr); break; 2210 case lir_div_strictfp: // fall through 2211 case lir_div: __ divsd(lreg, raddr); break; 2212 default: ShouldNotReachHere(); 2213 } 2214 } 2215 2216 } else if (left->is_single_fpu()) { 2217 assert(dest->is_single_fpu(), "fpu stack allocation required"); 2218 2219 if (right->is_single_fpu()) { 2220 arith_fpu_implementation(code, left->fpu_regnr(), right->fpu_regnr(), dest->fpu_regnr(), pop_fpu_stack); 2221 2222 } else { 2223 assert(left->fpu_regnr() == 0, "left must be on TOS"); 2224 assert(dest->fpu_regnr() == 0, "dest must be on TOS"); 2225 2226 Address raddr; 2227 if (right->is_single_stack()) { 2228 raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2229 } else if (right->is_constant()) { 2230 address const_addr = float_constant(right->as_jfloat()); 2231 assert(const_addr != NULL, "incorrect float/double constant maintainance"); 2232 // hack for now 2233 raddr = __ as_Address(InternalAddress(const_addr)); 2234 } else { 2235 ShouldNotReachHere(); 2236 } 2237 2238 switch (code) { 2239 case lir_add: __ fadd_s(raddr); break; 2240 case lir_sub: __ fsub_s(raddr); break; 2241 case lir_mul_strictfp: // fall through 2242 case lir_mul: __ fmul_s(raddr); break; 2243 case lir_div_strictfp: // fall through 2244 case lir_div: __ fdiv_s(raddr); break; 2245 default: ShouldNotReachHere(); 2246 } 2247 } 2248 2249 } else if (left->is_double_fpu()) { 2250 assert(dest->is_double_fpu(), "fpu stack allocation required"); 2251 2252 if (code == lir_mul_strictfp || code == lir_div_strictfp) { 2253 // Double values require special handling for strictfp mul/div on x86 2254 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1())); 2255 __ fmulp(left->fpu_regnrLo() + 1); 2256 } 2257 2258 if (right->is_double_fpu()) { 2259 arith_fpu_implementation(code, left->fpu_regnrLo(), right->fpu_regnrLo(), dest->fpu_regnrLo(), pop_fpu_stack); 2260 2261 } else { 2262 assert(left->fpu_regnrLo() == 0, "left must be on TOS"); 2263 assert(dest->fpu_regnrLo() == 0, "dest must be on TOS"); 2264 2265 Address raddr; 2266 if (right->is_double_stack()) { 2267 raddr = frame_map()->address_for_slot(right->double_stack_ix()); 2268 } else if (right->is_constant()) { 2269 // hack for now 2270 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble()))); 2271 } else { 2272 ShouldNotReachHere(); 2273 } 2274 2275 switch (code) { 2276 case lir_add: __ fadd_d(raddr); break; 2277 case lir_sub: __ fsub_d(raddr); break; 2278 case lir_mul_strictfp: // fall through 2279 case lir_mul: __ fmul_d(raddr); break; 2280 case lir_div_strictfp: // fall through 2281 case lir_div: __ fdiv_d(raddr); break; 2282 default: ShouldNotReachHere(); 2283 } 2284 } 2285 2286 if (code == lir_mul_strictfp || code == lir_div_strictfp) { 2287 // Double values require special handling for strictfp mul/div on x86 2288 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2())); 2289 __ fmulp(dest->fpu_regnrLo() + 1); 2290 } 2291 2292 } else if (left->is_single_stack() || left->is_address()) { 2293 assert(left == dest, "left and dest must be equal"); 2294 2295 Address laddr; 2296 if (left->is_single_stack()) { 2297 laddr = frame_map()->address_for_slot(left->single_stack_ix()); 2298 } else if (left->is_address()) { 2299 laddr = as_Address(left->as_address_ptr()); 2300 } else { 2301 ShouldNotReachHere(); 2302 } 2303 2304 if (right->is_single_cpu()) { 2305 Register rreg = right->as_register(); 2306 switch (code) { 2307 case lir_add: __ addl(laddr, rreg); break; 2308 case lir_sub: __ subl(laddr, rreg); break; 2309 default: ShouldNotReachHere(); 2310 } 2311 } else if (right->is_constant()) { 2312 jint c = right->as_constant_ptr()->as_jint(); 2313 switch (code) { 2314 case lir_add: { 2315 __ incrementl(laddr, c); 2316 break; 2317 } 2318 case lir_sub: { 2319 __ decrementl(laddr, c); 2320 break; 2321 } 2322 default: ShouldNotReachHere(); 2323 } 2324 } else { 2325 ShouldNotReachHere(); 2326 } 2327 2328 } else { 2329 ShouldNotReachHere(); 2330 } 2331 } 2332 2333 void LIR_Assembler::arith_fpu_implementation(LIR_Code code, int left_index, int right_index, int dest_index, bool pop_fpu_stack) { 2334 assert(pop_fpu_stack || (left_index == dest_index || right_index == dest_index), "invalid LIR"); 2335 assert(!pop_fpu_stack || (left_index - 1 == dest_index || right_index - 1 == dest_index), "invalid LIR"); 2336 assert(left_index == 0 || right_index == 0, "either must be on top of stack"); 2337 2338 bool left_is_tos = (left_index == 0); 2339 bool dest_is_tos = (dest_index == 0); 2340 int non_tos_index = (left_is_tos ? right_index : left_index); 2341 2342 switch (code) { 2343 case lir_add: 2344 if (pop_fpu_stack) __ faddp(non_tos_index); 2345 else if (dest_is_tos) __ fadd (non_tos_index); 2346 else __ fadda(non_tos_index); 2347 break; 2348 2349 case lir_sub: 2350 if (left_is_tos) { 2351 if (pop_fpu_stack) __ fsubrp(non_tos_index); 2352 else if (dest_is_tos) __ fsub (non_tos_index); 2353 else __ fsubra(non_tos_index); 2354 } else { 2355 if (pop_fpu_stack) __ fsubp (non_tos_index); 2356 else if (dest_is_tos) __ fsubr (non_tos_index); 2357 else __ fsuba (non_tos_index); 2358 } 2359 break; 2360 2361 case lir_mul_strictfp: // fall through 2362 case lir_mul: 2363 if (pop_fpu_stack) __ fmulp(non_tos_index); 2364 else if (dest_is_tos) __ fmul (non_tos_index); 2365 else __ fmula(non_tos_index); 2366 break; 2367 2368 case lir_div_strictfp: // fall through 2369 case lir_div: 2370 if (left_is_tos) { 2371 if (pop_fpu_stack) __ fdivrp(non_tos_index); 2372 else if (dest_is_tos) __ fdiv (non_tos_index); 2373 else __ fdivra(non_tos_index); 2374 } else { 2375 if (pop_fpu_stack) __ fdivp (non_tos_index); 2376 else if (dest_is_tos) __ fdivr (non_tos_index); 2377 else __ fdiva (non_tos_index); 2378 } 2379 break; 2380 2381 case lir_rem: 2382 assert(left_is_tos && dest_is_tos && right_index == 1, "must be guaranteed by FPU stack allocation"); 2383 __ fremr(noreg); 2384 break; 2385 2386 default: 2387 ShouldNotReachHere(); 2388 } 2389 } 2390 2391 2392 void LIR_Assembler::intrinsic_op(LIR_Code code, LIR_Opr value, LIR_Opr tmp, LIR_Opr dest, LIR_Op* op) { 2393 if (value->is_double_xmm()) { 2394 switch(code) { 2395 case lir_abs : 2396 { 2397 #ifdef _LP64 2398 if (UseAVX > 2 && !VM_Version::supports_avx512vl()) { 2399 assert(tmp->is_valid(), "need temporary"); 2400 __ vpandn(dest->as_xmm_double_reg(), tmp->as_xmm_double_reg(), value->as_xmm_double_reg(), 2); 2401 } else 2402 #endif 2403 { 2404 if (dest->as_xmm_double_reg() != value->as_xmm_double_reg()) { 2405 __ movdbl(dest->as_xmm_double_reg(), value->as_xmm_double_reg()); 2406 } 2407 assert(!tmp->is_valid(), "do not need temporary"); 2408 __ andpd(dest->as_xmm_double_reg(), 2409 ExternalAddress((address)double_signmask_pool)); 2410 } 2411 } 2412 break; 2413 2414 case lir_sqrt: __ sqrtsd(dest->as_xmm_double_reg(), value->as_xmm_double_reg()); break; 2415 // all other intrinsics are not available in the SSE instruction set, so FPU is used 2416 default : ShouldNotReachHere(); 2417 } 2418 2419 } else if (value->is_double_fpu()) { 2420 assert(value->fpu_regnrLo() == 0 && dest->fpu_regnrLo() == 0, "both must be on TOS"); 2421 switch(code) { 2422 case lir_abs : __ fabs() ; break; 2423 case lir_sqrt : __ fsqrt(); break; 2424 default : ShouldNotReachHere(); 2425 } 2426 } else { 2427 Unimplemented(); 2428 } 2429 } 2430 2431 void LIR_Assembler::logic_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst) { 2432 // assert(left->destroys_register(), "check"); 2433 if (left->is_single_cpu()) { 2434 Register reg = left->as_register(); 2435 if (right->is_constant()) { 2436 int val = right->as_constant_ptr()->as_jint(); 2437 switch (code) { 2438 case lir_logic_and: __ andl (reg, val); break; 2439 case lir_logic_or: __ orl (reg, val); break; 2440 case lir_logic_xor: __ xorl (reg, val); break; 2441 default: ShouldNotReachHere(); 2442 } 2443 } else if (right->is_stack()) { 2444 // added support for stack operands 2445 Address raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2446 switch (code) { 2447 case lir_logic_and: __ andl (reg, raddr); break; 2448 case lir_logic_or: __ orl (reg, raddr); break; 2449 case lir_logic_xor: __ xorl (reg, raddr); break; 2450 default: ShouldNotReachHere(); 2451 } 2452 } else { 2453 Register rright = right->as_register(); 2454 switch (code) { 2455 case lir_logic_and: __ andptr (reg, rright); break; 2456 case lir_logic_or : __ orptr (reg, rright); break; 2457 case lir_logic_xor: __ xorptr (reg, rright); break; 2458 default: ShouldNotReachHere(); 2459 } 2460 } 2461 move_regs(reg, dst->as_register()); 2462 } else { 2463 Register l_lo = left->as_register_lo(); 2464 Register l_hi = left->as_register_hi(); 2465 if (right->is_constant()) { 2466 #ifdef _LP64 2467 __ mov64(rscratch1, right->as_constant_ptr()->as_jlong()); 2468 switch (code) { 2469 case lir_logic_and: 2470 __ andq(l_lo, rscratch1); 2471 break; 2472 case lir_logic_or: 2473 __ orq(l_lo, rscratch1); 2474 break; 2475 case lir_logic_xor: 2476 __ xorq(l_lo, rscratch1); 2477 break; 2478 default: ShouldNotReachHere(); 2479 } 2480 #else 2481 int r_lo = right->as_constant_ptr()->as_jint_lo(); 2482 int r_hi = right->as_constant_ptr()->as_jint_hi(); 2483 switch (code) { 2484 case lir_logic_and: 2485 __ andl(l_lo, r_lo); 2486 __ andl(l_hi, r_hi); 2487 break; 2488 case lir_logic_or: 2489 __ orl(l_lo, r_lo); 2490 __ orl(l_hi, r_hi); 2491 break; 2492 case lir_logic_xor: 2493 __ xorl(l_lo, r_lo); 2494 __ xorl(l_hi, r_hi); 2495 break; 2496 default: ShouldNotReachHere(); 2497 } 2498 #endif // _LP64 2499 } else { 2500 #ifdef _LP64 2501 Register r_lo; 2502 if (right->type() == T_OBJECT || right->type() == T_ARRAY || right->type() == T_VALUETYPE) { 2503 r_lo = right->as_register(); 2504 } else { 2505 r_lo = right->as_register_lo(); 2506 } 2507 #else 2508 Register r_lo = right->as_register_lo(); 2509 Register r_hi = right->as_register_hi(); 2510 assert(l_lo != r_hi, "overwriting registers"); 2511 #endif 2512 switch (code) { 2513 case lir_logic_and: 2514 __ andptr(l_lo, r_lo); 2515 NOT_LP64(__ andptr(l_hi, r_hi);) 2516 break; 2517 case lir_logic_or: 2518 __ orptr(l_lo, r_lo); 2519 NOT_LP64(__ orptr(l_hi, r_hi);) 2520 break; 2521 case lir_logic_xor: 2522 __ xorptr(l_lo, r_lo); 2523 NOT_LP64(__ xorptr(l_hi, r_hi);) 2524 break; 2525 default: ShouldNotReachHere(); 2526 } 2527 } 2528 2529 Register dst_lo = dst->as_register_lo(); 2530 Register dst_hi = dst->as_register_hi(); 2531 2532 #ifdef _LP64 2533 move_regs(l_lo, dst_lo); 2534 #else 2535 if (dst_lo == l_hi) { 2536 assert(dst_hi != l_lo, "overwriting registers"); 2537 move_regs(l_hi, dst_hi); 2538 move_regs(l_lo, dst_lo); 2539 } else { 2540 assert(dst_lo != l_hi, "overwriting registers"); 2541 move_regs(l_lo, dst_lo); 2542 move_regs(l_hi, dst_hi); 2543 } 2544 #endif // _LP64 2545 } 2546 } 2547 2548 2549 // we assume that rax, and rdx can be overwritten 2550 void LIR_Assembler::arithmetic_idiv(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr temp, LIR_Opr result, CodeEmitInfo* info) { 2551 2552 assert(left->is_single_cpu(), "left must be register"); 2553 assert(right->is_single_cpu() || right->is_constant(), "right must be register or constant"); 2554 assert(result->is_single_cpu(), "result must be register"); 2555 2556 // assert(left->destroys_register(), "check"); 2557 // assert(right->destroys_register(), "check"); 2558 2559 Register lreg = left->as_register(); 2560 Register dreg = result->as_register(); 2561 2562 if (right->is_constant()) { 2563 jint divisor = right->as_constant_ptr()->as_jint(); 2564 assert(divisor > 0 && is_power_of_2(divisor), "must be"); 2565 if (code == lir_idiv) { 2566 assert(lreg == rax, "must be rax,"); 2567 assert(temp->as_register() == rdx, "tmp register must be rdx"); 2568 __ cdql(); // sign extend into rdx:rax 2569 if (divisor == 2) { 2570 __ subl(lreg, rdx); 2571 } else { 2572 __ andl(rdx, divisor - 1); 2573 __ addl(lreg, rdx); 2574 } 2575 __ sarl(lreg, log2_jint(divisor)); 2576 move_regs(lreg, dreg); 2577 } else if (code == lir_irem) { 2578 Label done; 2579 __ mov(dreg, lreg); 2580 __ andl(dreg, 0x80000000 | (divisor - 1)); 2581 __ jcc(Assembler::positive, done); 2582 __ decrement(dreg); 2583 __ orl(dreg, ~(divisor - 1)); 2584 __ increment(dreg); 2585 __ bind(done); 2586 } else { 2587 ShouldNotReachHere(); 2588 } 2589 } else { 2590 Register rreg = right->as_register(); 2591 assert(lreg == rax, "left register must be rax,"); 2592 assert(rreg != rdx, "right register must not be rdx"); 2593 assert(temp->as_register() == rdx, "tmp register must be rdx"); 2594 2595 move_regs(lreg, rax); 2596 2597 int idivl_offset = __ corrected_idivl(rreg); 2598 if (ImplicitDiv0Checks) { 2599 add_debug_info_for_div0(idivl_offset, info); 2600 } 2601 if (code == lir_irem) { 2602 move_regs(rdx, dreg); // result is in rdx 2603 } else { 2604 move_regs(rax, dreg); 2605 } 2606 } 2607 } 2608 2609 2610 void LIR_Assembler::comp_op(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Op2* op) { 2611 if (opr1->is_single_cpu()) { 2612 Register reg1 = opr1->as_register(); 2613 if (opr2->is_single_cpu()) { 2614 // cpu register - cpu register 2615 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY || opr1->type() == T_VALUETYPE) { 2616 __ cmpoop(reg1, opr2->as_register()); 2617 } else { 2618 assert(opr2->type() != T_OBJECT && opr2->type() != T_ARRAY && opr2->type() != T_VALUETYPE, "cmp int, oop?"); 2619 __ cmpl(reg1, opr2->as_register()); 2620 } 2621 } else if (opr2->is_stack()) { 2622 // cpu register - stack 2623 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY || opr1->type() == T_VALUETYPE) { 2624 __ cmpoop(reg1, frame_map()->address_for_slot(opr2->single_stack_ix())); 2625 } else { 2626 __ cmpl(reg1, frame_map()->address_for_slot(opr2->single_stack_ix())); 2627 } 2628 } else if (opr2->is_constant()) { 2629 // cpu register - constant 2630 LIR_Const* c = opr2->as_constant_ptr(); 2631 if (c->type() == T_INT) { 2632 __ cmpl(reg1, c->as_jint()); 2633 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY || c->type() == T_VALUETYPE) { 2634 // In 64bit oops are single register 2635 jobject o = c->as_jobject(); 2636 if (o == NULL) { 2637 __ cmpptr(reg1, (int32_t)NULL_WORD); 2638 } else { 2639 __ cmpoop(reg1, o); 2640 } 2641 } else { 2642 fatal("unexpected type: %s", basictype_to_str(c->type())); 2643 } 2644 // cpu register - address 2645 } else if (opr2->is_address()) { 2646 if (op->info() != NULL) { 2647 add_debug_info_for_null_check_here(op->info()); 2648 } 2649 __ cmpl(reg1, as_Address(opr2->as_address_ptr())); 2650 } else { 2651 ShouldNotReachHere(); 2652 } 2653 2654 } else if(opr1->is_double_cpu()) { 2655 Register xlo = opr1->as_register_lo(); 2656 Register xhi = opr1->as_register_hi(); 2657 if (opr2->is_double_cpu()) { 2658 #ifdef _LP64 2659 __ cmpptr(xlo, opr2->as_register_lo()); 2660 #else 2661 // cpu register - cpu register 2662 Register ylo = opr2->as_register_lo(); 2663 Register yhi = opr2->as_register_hi(); 2664 __ subl(xlo, ylo); 2665 __ sbbl(xhi, yhi); 2666 if (condition == lir_cond_equal || condition == lir_cond_notEqual) { 2667 __ orl(xhi, xlo); 2668 } 2669 #endif // _LP64 2670 } else if (opr2->is_constant()) { 2671 // cpu register - constant 0 2672 assert(opr2->as_jlong() == (jlong)0, "only handles zero"); 2673 #ifdef _LP64 2674 __ cmpptr(xlo, (int32_t)opr2->as_jlong()); 2675 #else 2676 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "only handles equals case"); 2677 __ orl(xhi, xlo); 2678 #endif // _LP64 2679 } else { 2680 ShouldNotReachHere(); 2681 } 2682 2683 } else if (opr1->is_single_xmm()) { 2684 XMMRegister reg1 = opr1->as_xmm_float_reg(); 2685 if (opr2->is_single_xmm()) { 2686 // xmm register - xmm register 2687 __ ucomiss(reg1, opr2->as_xmm_float_reg()); 2688 } else if (opr2->is_stack()) { 2689 // xmm register - stack 2690 __ ucomiss(reg1, frame_map()->address_for_slot(opr2->single_stack_ix())); 2691 } else if (opr2->is_constant()) { 2692 // xmm register - constant 2693 __ ucomiss(reg1, InternalAddress(float_constant(opr2->as_jfloat()))); 2694 } else if (opr2->is_address()) { 2695 // xmm register - address 2696 if (op->info() != NULL) { 2697 add_debug_info_for_null_check_here(op->info()); 2698 } 2699 __ ucomiss(reg1, as_Address(opr2->as_address_ptr())); 2700 } else { 2701 ShouldNotReachHere(); 2702 } 2703 2704 } else if (opr1->is_double_xmm()) { 2705 XMMRegister reg1 = opr1->as_xmm_double_reg(); 2706 if (opr2->is_double_xmm()) { 2707 // xmm register - xmm register 2708 __ ucomisd(reg1, opr2->as_xmm_double_reg()); 2709 } else if (opr2->is_stack()) { 2710 // xmm register - stack 2711 __ ucomisd(reg1, frame_map()->address_for_slot(opr2->double_stack_ix())); 2712 } else if (opr2->is_constant()) { 2713 // xmm register - constant 2714 __ ucomisd(reg1, InternalAddress(double_constant(opr2->as_jdouble()))); 2715 } else if (opr2->is_address()) { 2716 // xmm register - address 2717 if (op->info() != NULL) { 2718 add_debug_info_for_null_check_here(op->info()); 2719 } 2720 __ ucomisd(reg1, as_Address(opr2->pointer()->as_address())); 2721 } else { 2722 ShouldNotReachHere(); 2723 } 2724 2725 } else if(opr1->is_single_fpu() || opr1->is_double_fpu()) { 2726 assert(opr1->is_fpu_register() && opr1->fpu() == 0, "currently left-hand side must be on TOS (relax this restriction)"); 2727 assert(opr2->is_fpu_register(), "both must be registers"); 2728 __ fcmp(noreg, opr2->fpu(), op->fpu_pop_count() > 0, op->fpu_pop_count() > 1); 2729 2730 } else if (opr1->is_address() && opr2->is_constant()) { 2731 LIR_Const* c = opr2->as_constant_ptr(); 2732 #ifdef _LP64 2733 if (c->type() == T_OBJECT || c->type() == T_ARRAY || c->type() == T_VALUETYPE) { 2734 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "need to reverse"); 2735 __ movoop(rscratch1, c->as_jobject()); 2736 } 2737 #endif // LP64 2738 if (op->info() != NULL) { 2739 add_debug_info_for_null_check_here(op->info()); 2740 } 2741 // special case: address - constant 2742 LIR_Address* addr = opr1->as_address_ptr(); 2743 if (c->type() == T_INT) { 2744 __ cmpl(as_Address(addr), c->as_jint()); 2745 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY || c->type() == T_VALUETYPE) { 2746 #ifdef _LP64 2747 // %%% Make this explode if addr isn't reachable until we figure out a 2748 // better strategy by giving noreg as the temp for as_Address 2749 __ cmpoop(rscratch1, as_Address(addr, noreg)); 2750 #else 2751 __ cmpoop(as_Address(addr), c->as_jobject()); 2752 #endif // _LP64 2753 } else { 2754 ShouldNotReachHere(); 2755 } 2756 2757 } else { 2758 ShouldNotReachHere(); 2759 } 2760 } 2761 2762 void LIR_Assembler::comp_fl2i(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst, LIR_Op2* op) { 2763 if (code == lir_cmp_fd2i || code == lir_ucmp_fd2i) { 2764 if (left->is_single_xmm()) { 2765 assert(right->is_single_xmm(), "must match"); 2766 __ cmpss2int(left->as_xmm_float_reg(), right->as_xmm_float_reg(), dst->as_register(), code == lir_ucmp_fd2i); 2767 } else if (left->is_double_xmm()) { 2768 assert(right->is_double_xmm(), "must match"); 2769 __ cmpsd2int(left->as_xmm_double_reg(), right->as_xmm_double_reg(), dst->as_register(), code == lir_ucmp_fd2i); 2770 2771 } else { 2772 assert(left->is_single_fpu() || left->is_double_fpu(), "must be"); 2773 assert(right->is_single_fpu() || right->is_double_fpu(), "must match"); 2774 2775 assert(left->fpu() == 0, "left must be on TOS"); 2776 __ fcmp2int(dst->as_register(), code == lir_ucmp_fd2i, right->fpu(), 2777 op->fpu_pop_count() > 0, op->fpu_pop_count() > 1); 2778 } 2779 } else { 2780 assert(code == lir_cmp_l2i, "check"); 2781 #ifdef _LP64 2782 Label done; 2783 Register dest = dst->as_register(); 2784 __ cmpptr(left->as_register_lo(), right->as_register_lo()); 2785 __ movl(dest, -1); 2786 __ jccb(Assembler::less, done); 2787 __ set_byte_if_not_zero(dest); 2788 __ movzbl(dest, dest); 2789 __ bind(done); 2790 #else 2791 __ lcmp2int(left->as_register_hi(), 2792 left->as_register_lo(), 2793 right->as_register_hi(), 2794 right->as_register_lo()); 2795 move_regs(left->as_register_hi(), dst->as_register()); 2796 #endif // _LP64 2797 } 2798 } 2799 2800 2801 void LIR_Assembler::align_call(LIR_Code code) { 2802 // make sure that the displacement word of the call ends up word aligned 2803 int offset = __ offset(); 2804 switch (code) { 2805 case lir_static_call: 2806 case lir_optvirtual_call: 2807 case lir_dynamic_call: 2808 offset += NativeCall::displacement_offset; 2809 break; 2810 case lir_icvirtual_call: 2811 offset += NativeCall::displacement_offset + NativeMovConstReg::instruction_size; 2812 break; 2813 case lir_virtual_call: // currently, sparc-specific for niagara 2814 default: ShouldNotReachHere(); 2815 } 2816 __ align(BytesPerWord, offset); 2817 } 2818 2819 2820 void LIR_Assembler::call(LIR_OpJavaCall* op, relocInfo::relocType rtype) { 2821 assert((__ offset() + NativeCall::displacement_offset) % BytesPerWord == 0, 2822 "must be aligned"); 2823 __ call(AddressLiteral(op->addr(), rtype)); 2824 add_call_info(code_offset(), op->info()); 2825 } 2826 2827 2828 void LIR_Assembler::ic_call(LIR_OpJavaCall* op) { 2829 __ ic_call(op->addr()); 2830 add_call_info(code_offset(), op->info()); 2831 assert((__ offset() - NativeCall::instruction_size + NativeCall::displacement_offset) % BytesPerWord == 0, 2832 "must be aligned"); 2833 } 2834 2835 2836 /* Currently, vtable-dispatch is only enabled for sparc platforms */ 2837 void LIR_Assembler::vtable_call(LIR_OpJavaCall* op) { 2838 ShouldNotReachHere(); 2839 } 2840 2841 2842 void LIR_Assembler::emit_static_call_stub() { 2843 address call_pc = __ pc(); 2844 address stub = __ start_a_stub(call_stub_size()); 2845 if (stub == NULL) { 2846 bailout("static call stub overflow"); 2847 return; 2848 } 2849 2850 int start = __ offset(); 2851 2852 // make sure that the displacement word of the call ends up word aligned 2853 __ align(BytesPerWord, __ offset() + NativeMovConstReg::instruction_size + NativeCall::displacement_offset); 2854 __ relocate(static_stub_Relocation::spec(call_pc, false /* is_aot */)); 2855 __ mov_metadata(rbx, (Metadata*)NULL); 2856 // must be set to -1 at code generation time 2857 assert(((__ offset() + 1) % BytesPerWord) == 0, "must be aligned"); 2858 // On 64bit this will die since it will take a movq & jmp, must be only a jmp 2859 __ jump(RuntimeAddress(__ pc())); 2860 2861 if (UseAOT) { 2862 // Trampoline to aot code 2863 __ relocate(static_stub_Relocation::spec(call_pc, true /* is_aot */)); 2864 #ifdef _LP64 2865 __ mov64(rax, CONST64(0)); // address is zapped till fixup time. 2866 #else 2867 __ movl(rax, 0xdeadffff); // address is zapped till fixup time. 2868 #endif 2869 __ jmp(rax); 2870 } 2871 assert(__ offset() - start <= call_stub_size(), "stub too big"); 2872 __ end_a_stub(); 2873 } 2874 2875 2876 void LIR_Assembler::throw_op(LIR_Opr exceptionPC, LIR_Opr exceptionOop, CodeEmitInfo* info) { 2877 assert(exceptionOop->as_register() == rax, "must match"); 2878 assert(exceptionPC->as_register() == rdx, "must match"); 2879 2880 // exception object is not added to oop map by LinearScan 2881 // (LinearScan assumes that no oops are in fixed registers) 2882 info->add_register_oop(exceptionOop); 2883 Runtime1::StubID unwind_id; 2884 2885 // get current pc information 2886 // pc is only needed if the method has an exception handler, the unwind code does not need it. 2887 int pc_for_athrow_offset = __ offset(); 2888 InternalAddress pc_for_athrow(__ pc()); 2889 __ lea(exceptionPC->as_register(), pc_for_athrow); 2890 add_call_info(pc_for_athrow_offset, info); // for exception handler 2891 2892 __ verify_not_null_oop(rax); 2893 // search an exception handler (rax: exception oop, rdx: throwing pc) 2894 if (compilation()->has_fpu_code()) { 2895 unwind_id = Runtime1::handle_exception_id; 2896 } else { 2897 unwind_id = Runtime1::handle_exception_nofpu_id; 2898 } 2899 __ call(RuntimeAddress(Runtime1::entry_for(unwind_id))); 2900 2901 // enough room for two byte trap 2902 __ nop(); 2903 } 2904 2905 2906 void LIR_Assembler::unwind_op(LIR_Opr exceptionOop) { 2907 assert(exceptionOop->as_register() == rax, "must match"); 2908 2909 __ jmp(_unwind_handler_entry); 2910 } 2911 2912 2913 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, LIR_Opr count, LIR_Opr dest, LIR_Opr tmp) { 2914 2915 // optimized version for linear scan: 2916 // * count must be already in ECX (guaranteed by LinearScan) 2917 // * left and dest must be equal 2918 // * tmp must be unused 2919 assert(count->as_register() == SHIFT_count, "count must be in ECX"); 2920 assert(left == dest, "left and dest must be equal"); 2921 assert(tmp->is_illegal(), "wasting a register if tmp is allocated"); 2922 2923 if (left->is_single_cpu()) { 2924 Register value = left->as_register(); 2925 assert(value != SHIFT_count, "left cannot be ECX"); 2926 2927 switch (code) { 2928 case lir_shl: __ shll(value); break; 2929 case lir_shr: __ sarl(value); break; 2930 case lir_ushr: __ shrl(value); break; 2931 default: ShouldNotReachHere(); 2932 } 2933 } else if (left->is_double_cpu()) { 2934 Register lo = left->as_register_lo(); 2935 Register hi = left->as_register_hi(); 2936 assert(lo != SHIFT_count && hi != SHIFT_count, "left cannot be ECX"); 2937 #ifdef _LP64 2938 switch (code) { 2939 case lir_shl: __ shlptr(lo); break; 2940 case lir_shr: __ sarptr(lo); break; 2941 case lir_ushr: __ shrptr(lo); break; 2942 default: ShouldNotReachHere(); 2943 } 2944 #else 2945 2946 switch (code) { 2947 case lir_shl: __ lshl(hi, lo); break; 2948 case lir_shr: __ lshr(hi, lo, true); break; 2949 case lir_ushr: __ lshr(hi, lo, false); break; 2950 default: ShouldNotReachHere(); 2951 } 2952 #endif // LP64 2953 } else { 2954 ShouldNotReachHere(); 2955 } 2956 } 2957 2958 2959 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, jint count, LIR_Opr dest) { 2960 if (dest->is_single_cpu()) { 2961 // first move left into dest so that left is not destroyed by the shift 2962 Register value = dest->as_register(); 2963 count = count & 0x1F; // Java spec 2964 2965 move_regs(left->as_register(), value); 2966 switch (code) { 2967 case lir_shl: __ shll(value, count); break; 2968 case lir_shr: __ sarl(value, count); break; 2969 case lir_ushr: __ shrl(value, count); break; 2970 default: ShouldNotReachHere(); 2971 } 2972 } else if (dest->is_double_cpu()) { 2973 #ifndef _LP64 2974 Unimplemented(); 2975 #else 2976 // first move left into dest so that left is not destroyed by the shift 2977 Register value = dest->as_register_lo(); 2978 count = count & 0x1F; // Java spec 2979 2980 move_regs(left->as_register_lo(), value); 2981 switch (code) { 2982 case lir_shl: __ shlptr(value, count); break; 2983 case lir_shr: __ sarptr(value, count); break; 2984 case lir_ushr: __ shrptr(value, count); break; 2985 default: ShouldNotReachHere(); 2986 } 2987 #endif // _LP64 2988 } else { 2989 ShouldNotReachHere(); 2990 } 2991 } 2992 2993 2994 void LIR_Assembler::store_parameter(Register r, int offset_from_rsp_in_words) { 2995 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 2996 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 2997 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 2998 __ movptr (Address(rsp, offset_from_rsp_in_bytes), r); 2999 } 3000 3001 3002 void LIR_Assembler::store_parameter(jint c, int offset_from_rsp_in_words) { 3003 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 3004 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 3005 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 3006 __ movptr (Address(rsp, offset_from_rsp_in_bytes), c); 3007 } 3008 3009 3010 void LIR_Assembler::store_parameter(jobject o, int offset_from_rsp_in_words) { 3011 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 3012 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 3013 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 3014 __ movoop (Address(rsp, offset_from_rsp_in_bytes), o); 3015 } 3016 3017 3018 void LIR_Assembler::store_parameter(Metadata* m, int offset_from_rsp_in_words) { 3019 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 3020 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 3021 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 3022 __ mov_metadata(Address(rsp, offset_from_rsp_in_bytes), m); 3023 } 3024 3025 3026 // This code replaces a call to arraycopy; no exception may 3027 // be thrown in this code, they must be thrown in the System.arraycopy 3028 // activation frame; we could save some checks if this would not be the case 3029 void LIR_Assembler::emit_arraycopy(LIR_OpArrayCopy* op) { 3030 ciArrayKlass* default_type = op->expected_type(); 3031 Register src = op->src()->as_register(); 3032 Register dst = op->dst()->as_register(); 3033 Register src_pos = op->src_pos()->as_register(); 3034 Register dst_pos = op->dst_pos()->as_register(); 3035 Register length = op->length()->as_register(); 3036 Register tmp = op->tmp()->as_register(); 3037 3038 __ resolve(ACCESS_READ, src); 3039 __ resolve(ACCESS_WRITE, dst); 3040 3041 CodeStub* stub = op->stub(); 3042 int flags = op->flags(); 3043 BasicType basic_type = default_type != NULL ? default_type->element_type()->basic_type() : T_ILLEGAL; 3044 if (basic_type == T_ARRAY) basic_type = T_OBJECT; 3045 3046 // if we don't know anything, just go through the generic arraycopy 3047 if (default_type == NULL) { 3048 // save outgoing arguments on stack in case call to System.arraycopy is needed 3049 // HACK ALERT. This code used to push the parameters in a hardwired fashion 3050 // for interpreter calling conventions. Now we have to do it in new style conventions. 3051 // For the moment until C1 gets the new register allocator I just force all the 3052 // args to the right place (except the register args) and then on the back side 3053 // reload the register args properly if we go slow path. Yuck 3054 3055 // These are proper for the calling convention 3056 store_parameter(length, 2); 3057 store_parameter(dst_pos, 1); 3058 store_parameter(dst, 0); 3059 3060 // these are just temporary placements until we need to reload 3061 store_parameter(src_pos, 3); 3062 store_parameter(src, 4); 3063 NOT_LP64(assert(src == rcx && src_pos == rdx, "mismatch in calling convention");) 3064 3065 address copyfunc_addr = StubRoutines::generic_arraycopy(); 3066 assert(copyfunc_addr != NULL, "generic arraycopy stub required"); 3067 3068 // pass arguments: may push as this is not a safepoint; SP must be fix at each safepoint 3069 #ifdef _LP64 3070 // The arguments are in java calling convention so we can trivially shift them to C 3071 // convention 3072 assert_different_registers(c_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4); 3073 __ mov(c_rarg0, j_rarg0); 3074 assert_different_registers(c_rarg1, j_rarg2, j_rarg3, j_rarg4); 3075 __ mov(c_rarg1, j_rarg1); 3076 assert_different_registers(c_rarg2, j_rarg3, j_rarg4); 3077 __ mov(c_rarg2, j_rarg2); 3078 assert_different_registers(c_rarg3, j_rarg4); 3079 __ mov(c_rarg3, j_rarg3); 3080 #ifdef _WIN64 3081 // Allocate abi space for args but be sure to keep stack aligned 3082 __ subptr(rsp, 6*wordSize); 3083 store_parameter(j_rarg4, 4); 3084 #ifndef PRODUCT 3085 if (PrintC1Statistics) { 3086 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt)); 3087 } 3088 #endif 3089 __ call(RuntimeAddress(copyfunc_addr)); 3090 __ addptr(rsp, 6*wordSize); 3091 #else 3092 __ mov(c_rarg4, j_rarg4); 3093 #ifndef PRODUCT 3094 if (PrintC1Statistics) { 3095 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt)); 3096 } 3097 #endif 3098 __ call(RuntimeAddress(copyfunc_addr)); 3099 #endif // _WIN64 3100 #else 3101 __ push(length); 3102 __ push(dst_pos); 3103 __ push(dst); 3104 __ push(src_pos); 3105 __ push(src); 3106 3107 #ifndef PRODUCT 3108 if (PrintC1Statistics) { 3109 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt)); 3110 } 3111 #endif 3112 __ call_VM_leaf(copyfunc_addr, 5); // removes pushed parameter from the stack 3113 3114 #endif // _LP64 3115 3116 __ cmpl(rax, 0); 3117 __ jcc(Assembler::equal, *stub->continuation()); 3118 3119 __ mov(tmp, rax); 3120 __ xorl(tmp, -1); 3121 3122 // Reload values from the stack so they are where the stub 3123 // expects them. 3124 __ movptr (dst, Address(rsp, 0*BytesPerWord)); 3125 __ movptr (dst_pos, Address(rsp, 1*BytesPerWord)); 3126 __ movptr (length, Address(rsp, 2*BytesPerWord)); 3127 __ movptr (src_pos, Address(rsp, 3*BytesPerWord)); 3128 __ movptr (src, Address(rsp, 4*BytesPerWord)); 3129 3130 __ subl(length, tmp); 3131 __ addl(src_pos, tmp); 3132 __ addl(dst_pos, tmp); 3133 __ jmp(*stub->entry()); 3134 3135 __ bind(*stub->continuation()); 3136 return; 3137 } 3138 3139 assert(default_type != NULL && default_type->is_array_klass() && default_type->is_loaded(), "must be true at this point"); 3140 3141 int elem_size = type2aelembytes(basic_type); 3142 Address::ScaleFactor scale; 3143 3144 switch (elem_size) { 3145 case 1 : 3146 scale = Address::times_1; 3147 break; 3148 case 2 : 3149 scale = Address::times_2; 3150 break; 3151 case 4 : 3152 scale = Address::times_4; 3153 break; 3154 case 8 : 3155 scale = Address::times_8; 3156 break; 3157 default: 3158 scale = Address::no_scale; 3159 ShouldNotReachHere(); 3160 } 3161 3162 Address src_length_addr = Address(src, arrayOopDesc::length_offset_in_bytes()); 3163 Address dst_length_addr = Address(dst, arrayOopDesc::length_offset_in_bytes()); 3164 Address src_klass_addr = Address(src, oopDesc::klass_offset_in_bytes()); 3165 Address dst_klass_addr = Address(dst, oopDesc::klass_offset_in_bytes()); 3166 3167 // length and pos's are all sign extended at this point on 64bit 3168 3169 // test for NULL 3170 if (flags & LIR_OpArrayCopy::src_null_check) { 3171 __ testptr(src, src); 3172 __ jcc(Assembler::zero, *stub->entry()); 3173 } 3174 if (flags & LIR_OpArrayCopy::dst_null_check) { 3175 __ testptr(dst, dst); 3176 __ jcc(Assembler::zero, *stub->entry()); 3177 } 3178 3179 // If the compiler was not able to prove that exact type of the source or the destination 3180 // of the arraycopy is an array type, check at runtime if the source or the destination is 3181 // an instance type. 3182 if (flags & LIR_OpArrayCopy::type_check) { 3183 if (!(flags & LIR_OpArrayCopy::dst_objarray)) { 3184 __ load_klass(tmp, dst); 3185 __ cmpl(Address(tmp, in_bytes(Klass::layout_helper_offset())), Klass::_lh_neutral_value); 3186 __ jcc(Assembler::greaterEqual, *stub->entry()); 3187 } 3188 3189 if (!(flags & LIR_OpArrayCopy::src_objarray)) { 3190 __ load_klass(tmp, src); 3191 __ cmpl(Address(tmp, in_bytes(Klass::layout_helper_offset())), Klass::_lh_neutral_value); 3192 __ jcc(Assembler::greaterEqual, *stub->entry()); 3193 } 3194 } 3195 3196 // check if negative 3197 if (flags & LIR_OpArrayCopy::src_pos_positive_check) { 3198 __ testl(src_pos, src_pos); 3199 __ jcc(Assembler::less, *stub->entry()); 3200 } 3201 if (flags & LIR_OpArrayCopy::dst_pos_positive_check) { 3202 __ testl(dst_pos, dst_pos); 3203 __ jcc(Assembler::less, *stub->entry()); 3204 } 3205 3206 if (flags & LIR_OpArrayCopy::src_range_check) { 3207 __ lea(tmp, Address(src_pos, length, Address::times_1, 0)); 3208 __ cmpl(tmp, src_length_addr); 3209 __ jcc(Assembler::above, *stub->entry()); 3210 } 3211 if (flags & LIR_OpArrayCopy::dst_range_check) { 3212 __ lea(tmp, Address(dst_pos, length, Address::times_1, 0)); 3213 __ cmpl(tmp, dst_length_addr); 3214 __ jcc(Assembler::above, *stub->entry()); 3215 } 3216 3217 if (flags & LIR_OpArrayCopy::length_positive_check) { 3218 __ testl(length, length); 3219 __ jcc(Assembler::less, *stub->entry()); 3220 } 3221 3222 #ifdef _LP64 3223 __ movl2ptr(src_pos, src_pos); //higher 32bits must be null 3224 __ movl2ptr(dst_pos, dst_pos); //higher 32bits must be null 3225 #endif 3226 3227 if (flags & LIR_OpArrayCopy::type_check) { 3228 // We don't know the array types are compatible 3229 if (basic_type != T_OBJECT) { 3230 // Simple test for basic type arrays 3231 if (UseCompressedClassPointers) { 3232 __ movl(tmp, src_klass_addr); 3233 __ cmpl(tmp, dst_klass_addr); 3234 } else { 3235 __ movptr(tmp, src_klass_addr); 3236 __ cmpptr(tmp, dst_klass_addr); 3237 } 3238 __ jcc(Assembler::notEqual, *stub->entry()); 3239 } else { 3240 // For object arrays, if src is a sub class of dst then we can 3241 // safely do the copy. 3242 Label cont, slow; 3243 3244 __ push(src); 3245 __ push(dst); 3246 3247 __ load_klass(src, src); 3248 __ load_klass(dst, dst); 3249 3250 __ check_klass_subtype_fast_path(src, dst, tmp, &cont, &slow, NULL); 3251 3252 __ push(src); 3253 __ push(dst); 3254 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 3255 __ pop(dst); 3256 __ pop(src); 3257 3258 __ cmpl(src, 0); 3259 __ jcc(Assembler::notEqual, cont); 3260 3261 __ bind(slow); 3262 __ pop(dst); 3263 __ pop(src); 3264 3265 address copyfunc_addr = StubRoutines::checkcast_arraycopy(); 3266 if (copyfunc_addr != NULL) { // use stub if available 3267 // src is not a sub class of dst so we have to do a 3268 // per-element check. 3269 3270 int mask = LIR_OpArrayCopy::src_objarray|LIR_OpArrayCopy::dst_objarray; 3271 if ((flags & mask) != mask) { 3272 // Check that at least both of them object arrays. 3273 assert(flags & mask, "one of the two should be known to be an object array"); 3274 3275 if (!(flags & LIR_OpArrayCopy::src_objarray)) { 3276 __ load_klass(tmp, src); 3277 } else if (!(flags & LIR_OpArrayCopy::dst_objarray)) { 3278 __ load_klass(tmp, dst); 3279 } 3280 int lh_offset = in_bytes(Klass::layout_helper_offset()); 3281 Address klass_lh_addr(tmp, lh_offset); 3282 jint objArray_lh = Klass::array_layout_helper(T_OBJECT); 3283 __ cmpl(klass_lh_addr, objArray_lh); 3284 __ jcc(Assembler::notEqual, *stub->entry()); 3285 } 3286 3287 // Spill because stubs can use any register they like and it's 3288 // easier to restore just those that we care about. 3289 store_parameter(dst, 0); 3290 store_parameter(dst_pos, 1); 3291 store_parameter(length, 2); 3292 store_parameter(src_pos, 3); 3293 store_parameter(src, 4); 3294 3295 #ifndef _LP64 3296 __ movptr(tmp, dst_klass_addr); 3297 __ movptr(tmp, Address(tmp, ObjArrayKlass::element_klass_offset())); 3298 __ push(tmp); 3299 __ movl(tmp, Address(tmp, Klass::super_check_offset_offset())); 3300 __ push(tmp); 3301 __ push(length); 3302 __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3303 __ push(tmp); 3304 __ lea(tmp, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3305 __ push(tmp); 3306 3307 __ call_VM_leaf(copyfunc_addr, 5); 3308 #else 3309 __ movl2ptr(length, length); //higher 32bits must be null 3310 3311 __ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3312 assert_different_registers(c_rarg0, dst, dst_pos, length); 3313 __ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3314 assert_different_registers(c_rarg1, dst, length); 3315 3316 __ mov(c_rarg2, length); 3317 assert_different_registers(c_rarg2, dst); 3318 3319 #ifdef _WIN64 3320 // Allocate abi space for args but be sure to keep stack aligned 3321 __ subptr(rsp, 6*wordSize); 3322 __ load_klass(c_rarg3, dst); 3323 __ movptr(c_rarg3, Address(c_rarg3, ObjArrayKlass::element_klass_offset())); 3324 store_parameter(c_rarg3, 4); 3325 __ movl(c_rarg3, Address(c_rarg3, Klass::super_check_offset_offset())); 3326 __ call(RuntimeAddress(copyfunc_addr)); 3327 __ addptr(rsp, 6*wordSize); 3328 #else 3329 __ load_klass(c_rarg4, dst); 3330 __ movptr(c_rarg4, Address(c_rarg4, ObjArrayKlass::element_klass_offset())); 3331 __ movl(c_rarg3, Address(c_rarg4, Klass::super_check_offset_offset())); 3332 __ call(RuntimeAddress(copyfunc_addr)); 3333 #endif 3334 3335 #endif 3336 3337 #ifndef PRODUCT 3338 if (PrintC1Statistics) { 3339 Label failed; 3340 __ testl(rax, rax); 3341 __ jcc(Assembler::notZero, failed); 3342 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_cnt)); 3343 __ bind(failed); 3344 } 3345 #endif 3346 3347 __ testl(rax, rax); 3348 __ jcc(Assembler::zero, *stub->continuation()); 3349 3350 #ifndef PRODUCT 3351 if (PrintC1Statistics) { 3352 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_attempt_cnt)); 3353 } 3354 #endif 3355 3356 __ mov(tmp, rax); 3357 3358 __ xorl(tmp, -1); 3359 3360 // Restore previously spilled arguments 3361 __ movptr (dst, Address(rsp, 0*BytesPerWord)); 3362 __ movptr (dst_pos, Address(rsp, 1*BytesPerWord)); 3363 __ movptr (length, Address(rsp, 2*BytesPerWord)); 3364 __ movptr (src_pos, Address(rsp, 3*BytesPerWord)); 3365 __ movptr (src, Address(rsp, 4*BytesPerWord)); 3366 3367 3368 __ subl(length, tmp); 3369 __ addl(src_pos, tmp); 3370 __ addl(dst_pos, tmp); 3371 } 3372 3373 __ jmp(*stub->entry()); 3374 3375 __ bind(cont); 3376 __ pop(dst); 3377 __ pop(src); 3378 } 3379 } 3380 3381 #ifdef ASSERT 3382 if (basic_type != T_OBJECT || !(flags & LIR_OpArrayCopy::type_check)) { 3383 // Sanity check the known type with the incoming class. For the 3384 // primitive case the types must match exactly with src.klass and 3385 // dst.klass each exactly matching the default type. For the 3386 // object array case, if no type check is needed then either the 3387 // dst type is exactly the expected type and the src type is a 3388 // subtype which we can't check or src is the same array as dst 3389 // but not necessarily exactly of type default_type. 3390 Label known_ok, halt; 3391 __ mov_metadata(tmp, default_type->constant_encoding()); 3392 #ifdef _LP64 3393 if (UseCompressedClassPointers) { 3394 __ encode_klass_not_null(tmp); 3395 } 3396 #endif 3397 3398 if (basic_type != T_OBJECT) { 3399 3400 if (UseCompressedClassPointers) __ cmpl(tmp, dst_klass_addr); 3401 else __ cmpptr(tmp, dst_klass_addr); 3402 __ jcc(Assembler::notEqual, halt); 3403 if (UseCompressedClassPointers) __ cmpl(tmp, src_klass_addr); 3404 else __ cmpptr(tmp, src_klass_addr); 3405 __ jcc(Assembler::equal, known_ok); 3406 } else { 3407 if (UseCompressedClassPointers) __ cmpl(tmp, dst_klass_addr); 3408 else __ cmpptr(tmp, dst_klass_addr); 3409 __ jcc(Assembler::equal, known_ok); 3410 __ cmpptr(src, dst); 3411 __ jcc(Assembler::equal, known_ok); 3412 } 3413 __ bind(halt); 3414 __ stop("incorrect type information in arraycopy"); 3415 __ bind(known_ok); 3416 } 3417 #endif 3418 3419 #ifndef PRODUCT 3420 if (PrintC1Statistics) { 3421 __ incrementl(ExternalAddress(Runtime1::arraycopy_count_address(basic_type))); 3422 } 3423 #endif 3424 3425 #ifdef _LP64 3426 assert_different_registers(c_rarg0, dst, dst_pos, length); 3427 __ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3428 assert_different_registers(c_rarg1, length); 3429 __ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3430 __ mov(c_rarg2, length); 3431 3432 #else 3433 __ lea(tmp, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3434 store_parameter(tmp, 0); 3435 __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3436 store_parameter(tmp, 1); 3437 store_parameter(length, 2); 3438 #endif // _LP64 3439 3440 bool disjoint = (flags & LIR_OpArrayCopy::overlapping) == 0; 3441 bool aligned = (flags & LIR_OpArrayCopy::unaligned) == 0; 3442 const char *name; 3443 address entry = StubRoutines::select_arraycopy_function(basic_type, aligned, disjoint, name, false); 3444 __ call_VM_leaf(entry, 0); 3445 3446 __ bind(*stub->continuation()); 3447 } 3448 3449 void LIR_Assembler::emit_updatecrc32(LIR_OpUpdateCRC32* op) { 3450 assert(op->crc()->is_single_cpu(), "crc must be register"); 3451 assert(op->val()->is_single_cpu(), "byte value must be register"); 3452 assert(op->result_opr()->is_single_cpu(), "result must be register"); 3453 Register crc = op->crc()->as_register(); 3454 Register val = op->val()->as_register(); 3455 Register res = op->result_opr()->as_register(); 3456 3457 assert_different_registers(val, crc, res); 3458 3459 __ lea(res, ExternalAddress(StubRoutines::crc_table_addr())); 3460 __ notl(crc); // ~crc 3461 __ update_byte_crc32(crc, val, res); 3462 __ notl(crc); // ~crc 3463 __ mov(res, crc); 3464 } 3465 3466 void LIR_Assembler::emit_lock(LIR_OpLock* op) { 3467 Register obj = op->obj_opr()->as_register(); // may not be an oop 3468 Register hdr = op->hdr_opr()->as_register(); 3469 Register lock = op->lock_opr()->as_register(); 3470 if (!UseFastLocking) { 3471 __ jmp(*op->stub()->entry()); 3472 } else if (op->code() == lir_lock) { 3473 Register scratch = noreg; 3474 if (UseBiasedLocking) { 3475 scratch = op->scratch_opr()->as_register(); 3476 } 3477 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header"); 3478 __ resolve(ACCESS_READ | ACCESS_WRITE, obj); 3479 // add debug info for NullPointerException only if one is possible 3480 int null_check_offset = __ lock_object(hdr, obj, lock, scratch, *op->stub()->entry()); 3481 if (op->info() != NULL) { 3482 add_debug_info_for_null_check(null_check_offset, op->info()); 3483 } 3484 // done 3485 } else if (op->code() == lir_unlock) { 3486 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header"); 3487 __ unlock_object(hdr, obj, lock, *op->stub()->entry()); 3488 } else { 3489 Unimplemented(); 3490 } 3491 __ bind(*op->stub()->continuation()); 3492 } 3493 3494 3495 void LIR_Assembler::emit_profile_call(LIR_OpProfileCall* op) { 3496 ciMethod* method = op->profiled_method(); 3497 int bci = op->profiled_bci(); 3498 ciMethod* callee = op->profiled_callee(); 3499 3500 // Update counter for all call types 3501 ciMethodData* md = method->method_data_or_null(); 3502 assert(md != NULL, "Sanity"); 3503 ciProfileData* data = md->bci_to_data(bci); 3504 assert(data != NULL && data->is_CounterData(), "need CounterData for calls"); 3505 assert(op->mdo()->is_single_cpu(), "mdo must be allocated"); 3506 Register mdo = op->mdo()->as_register(); 3507 __ mov_metadata(mdo, md->constant_encoding()); 3508 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset())); 3509 // Perform additional virtual call profiling for invokevirtual and 3510 // invokeinterface bytecodes 3511 if (op->should_profile_receiver_type()) { 3512 assert(op->recv()->is_single_cpu(), "recv must be allocated"); 3513 Register recv = op->recv()->as_register(); 3514 assert_different_registers(mdo, recv); 3515 assert(data->is_VirtualCallData(), "need VirtualCallData for virtual calls"); 3516 ciKlass* known_klass = op->known_holder(); 3517 if (C1OptimizeVirtualCallProfiling && known_klass != NULL) { 3518 // We know the type that will be seen at this call site; we can 3519 // statically update the MethodData* rather than needing to do 3520 // dynamic tests on the receiver type 3521 3522 // NOTE: we should probably put a lock around this search to 3523 // avoid collisions by concurrent compilations 3524 ciVirtualCallData* vc_data = (ciVirtualCallData*) data; 3525 uint i; 3526 for (i = 0; i < VirtualCallData::row_limit(); i++) { 3527 ciKlass* receiver = vc_data->receiver(i); 3528 if (known_klass->equals(receiver)) { 3529 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i))); 3530 __ addptr(data_addr, DataLayout::counter_increment); 3531 return; 3532 } 3533 } 3534 3535 // Receiver type not found in profile data; select an empty slot 3536 3537 // Note that this is less efficient than it should be because it 3538 // always does a write to the receiver part of the 3539 // VirtualCallData rather than just the first time 3540 for (i = 0; i < VirtualCallData::row_limit(); i++) { 3541 ciKlass* receiver = vc_data->receiver(i); 3542 if (receiver == NULL) { 3543 Address recv_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_offset(i))); 3544 __ mov_metadata(recv_addr, known_klass->constant_encoding()); 3545 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i))); 3546 __ addptr(data_addr, DataLayout::counter_increment); 3547 return; 3548 } 3549 } 3550 } else { 3551 __ load_klass(recv, recv); 3552 Label update_done; 3553 type_profile_helper(mdo, md, data, recv, &update_done); 3554 // Receiver did not match any saved receiver and there is no empty row for it. 3555 // Increment total counter to indicate polymorphic case. 3556 __ addptr(counter_addr, DataLayout::counter_increment); 3557 3558 __ bind(update_done); 3559 } 3560 } else { 3561 // Static call 3562 __ addptr(counter_addr, DataLayout::counter_increment); 3563 } 3564 } 3565 3566 void LIR_Assembler::emit_profile_type(LIR_OpProfileType* op) { 3567 Register obj = op->obj()->as_register(); 3568 Register tmp = op->tmp()->as_pointer_register(); 3569 Address mdo_addr = as_Address(op->mdp()->as_address_ptr()); 3570 ciKlass* exact_klass = op->exact_klass(); 3571 intptr_t current_klass = op->current_klass(); 3572 bool not_null = op->not_null(); 3573 bool no_conflict = op->no_conflict(); 3574 3575 Label update, next, none; 3576 3577 bool do_null = !not_null; 3578 bool exact_klass_set = exact_klass != NULL && ciTypeEntries::valid_ciklass(current_klass) == exact_klass; 3579 bool do_update = !TypeEntries::is_type_unknown(current_klass) && !exact_klass_set; 3580 3581 assert(do_null || do_update, "why are we here?"); 3582 assert(!TypeEntries::was_null_seen(current_klass) || do_update, "why are we here?"); 3583 3584 __ verify_oop(obj); 3585 3586 if (tmp != obj) { 3587 __ mov(tmp, obj); 3588 } 3589 if (do_null) { 3590 __ testptr(tmp, tmp); 3591 __ jccb(Assembler::notZero, update); 3592 if (!TypeEntries::was_null_seen(current_klass)) { 3593 __ orptr(mdo_addr, TypeEntries::null_seen); 3594 } 3595 if (do_update) { 3596 #ifndef ASSERT 3597 __ jmpb(next); 3598 } 3599 #else 3600 __ jmp(next); 3601 } 3602 } else { 3603 __ testptr(tmp, tmp); 3604 __ jcc(Assembler::notZero, update); 3605 __ stop("unexpect null obj"); 3606 #endif 3607 } 3608 3609 __ bind(update); 3610 3611 if (do_update) { 3612 #ifdef ASSERT 3613 if (exact_klass != NULL) { 3614 Label ok; 3615 __ load_klass(tmp, tmp); 3616 __ push(tmp); 3617 __ mov_metadata(tmp, exact_klass->constant_encoding()); 3618 __ cmpptr(tmp, Address(rsp, 0)); 3619 __ jcc(Assembler::equal, ok); 3620 __ stop("exact klass and actual klass differ"); 3621 __ bind(ok); 3622 __ pop(tmp); 3623 } 3624 #endif 3625 if (!no_conflict) { 3626 if (exact_klass == NULL || TypeEntries::is_type_none(current_klass)) { 3627 if (exact_klass != NULL) { 3628 __ mov_metadata(tmp, exact_klass->constant_encoding()); 3629 } else { 3630 __ load_klass(tmp, tmp); 3631 } 3632 3633 __ xorptr(tmp, mdo_addr); 3634 __ testptr(tmp, TypeEntries::type_klass_mask); 3635 // klass seen before, nothing to do. The unknown bit may have been 3636 // set already but no need to check. 3637 __ jccb(Assembler::zero, next); 3638 3639 __ testptr(tmp, TypeEntries::type_unknown); 3640 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore. 3641 3642 if (TypeEntries::is_type_none(current_klass)) { 3643 __ cmpptr(mdo_addr, 0); 3644 __ jccb(Assembler::equal, none); 3645 __ cmpptr(mdo_addr, TypeEntries::null_seen); 3646 __ jccb(Assembler::equal, none); 3647 // There is a chance that the checks above (re-reading profiling 3648 // data from memory) fail if another thread has just set the 3649 // profiling to this obj's klass 3650 __ xorptr(tmp, mdo_addr); 3651 __ testptr(tmp, TypeEntries::type_klass_mask); 3652 __ jccb(Assembler::zero, next); 3653 } 3654 } else { 3655 assert(ciTypeEntries::valid_ciklass(current_klass) != NULL && 3656 ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "conflict only"); 3657 3658 __ movptr(tmp, mdo_addr); 3659 __ testptr(tmp, TypeEntries::type_unknown); 3660 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore. 3661 } 3662 3663 // different than before. Cannot keep accurate profile. 3664 __ orptr(mdo_addr, TypeEntries::type_unknown); 3665 3666 if (TypeEntries::is_type_none(current_klass)) { 3667 __ jmpb(next); 3668 3669 __ bind(none); 3670 // first time here. Set profile type. 3671 __ movptr(mdo_addr, tmp); 3672 } 3673 } else { 3674 // There's a single possible klass at this profile point 3675 assert(exact_klass != NULL, "should be"); 3676 if (TypeEntries::is_type_none(current_klass)) { 3677 __ mov_metadata(tmp, exact_klass->constant_encoding()); 3678 __ xorptr(tmp, mdo_addr); 3679 __ testptr(tmp, TypeEntries::type_klass_mask); 3680 #ifdef ASSERT 3681 __ jcc(Assembler::zero, next); 3682 3683 { 3684 Label ok; 3685 __ push(tmp); 3686 __ cmpptr(mdo_addr, 0); 3687 __ jcc(Assembler::equal, ok); 3688 __ cmpptr(mdo_addr, TypeEntries::null_seen); 3689 __ jcc(Assembler::equal, ok); 3690 // may have been set by another thread 3691 __ mov_metadata(tmp, exact_klass->constant_encoding()); 3692 __ xorptr(tmp, mdo_addr); 3693 __ testptr(tmp, TypeEntries::type_mask); 3694 __ jcc(Assembler::zero, ok); 3695 3696 __ stop("unexpected profiling mismatch"); 3697 __ bind(ok); 3698 __ pop(tmp); 3699 } 3700 #else 3701 __ jccb(Assembler::zero, next); 3702 #endif 3703 // first time here. Set profile type. 3704 __ movptr(mdo_addr, tmp); 3705 } else { 3706 assert(ciTypeEntries::valid_ciklass(current_klass) != NULL && 3707 ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "inconsistent"); 3708 3709 __ movptr(tmp, mdo_addr); 3710 __ testptr(tmp, TypeEntries::type_unknown); 3711 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore. 3712 3713 __ orptr(mdo_addr, TypeEntries::type_unknown); 3714 } 3715 } 3716 3717 __ bind(next); 3718 } 3719 } 3720 3721 void LIR_Assembler::emit_delay(LIR_OpDelay*) { 3722 Unimplemented(); 3723 } 3724 3725 3726 void LIR_Assembler::monitor_address(int monitor_no, LIR_Opr dst) { 3727 __ lea(dst->as_register(), frame_map()->address_for_monitor_lock(monitor_no)); 3728 } 3729 3730 3731 void LIR_Assembler::align_backward_branch_target() { 3732 __ align(BytesPerWord); 3733 } 3734 3735 3736 void LIR_Assembler::negate(LIR_Opr left, LIR_Opr dest, LIR_Opr tmp) { 3737 if (left->is_single_cpu()) { 3738 __ negl(left->as_register()); 3739 move_regs(left->as_register(), dest->as_register()); 3740 3741 } else if (left->is_double_cpu()) { 3742 Register lo = left->as_register_lo(); 3743 #ifdef _LP64 3744 Register dst = dest->as_register_lo(); 3745 __ movptr(dst, lo); 3746 __ negptr(dst); 3747 #else 3748 Register hi = left->as_register_hi(); 3749 __ lneg(hi, lo); 3750 if (dest->as_register_lo() == hi) { 3751 assert(dest->as_register_hi() != lo, "destroying register"); 3752 move_regs(hi, dest->as_register_hi()); 3753 move_regs(lo, dest->as_register_lo()); 3754 } else { 3755 move_regs(lo, dest->as_register_lo()); 3756 move_regs(hi, dest->as_register_hi()); 3757 } 3758 #endif // _LP64 3759 3760 } else if (dest->is_single_xmm()) { 3761 #ifdef _LP64 3762 if (UseAVX > 2 && !VM_Version::supports_avx512vl()) { 3763 assert(tmp->is_valid(), "need temporary"); 3764 assert_different_registers(left->as_xmm_float_reg(), tmp->as_xmm_float_reg()); 3765 __ vpxor(dest->as_xmm_float_reg(), tmp->as_xmm_float_reg(), left->as_xmm_float_reg(), 2); 3766 } 3767 else 3768 #endif 3769 { 3770 assert(!tmp->is_valid(), "do not need temporary"); 3771 if (left->as_xmm_float_reg() != dest->as_xmm_float_reg()) { 3772 __ movflt(dest->as_xmm_float_reg(), left->as_xmm_float_reg()); 3773 } 3774 __ xorps(dest->as_xmm_float_reg(), 3775 ExternalAddress((address)float_signflip_pool)); 3776 } 3777 } else if (dest->is_double_xmm()) { 3778 #ifdef _LP64 3779 if (UseAVX > 2 && !VM_Version::supports_avx512vl()) { 3780 assert(tmp->is_valid(), "need temporary"); 3781 assert_different_registers(left->as_xmm_double_reg(), tmp->as_xmm_double_reg()); 3782 __ vpxor(dest->as_xmm_double_reg(), tmp->as_xmm_double_reg(), left->as_xmm_double_reg(), 2); 3783 } 3784 else 3785 #endif 3786 { 3787 assert(!tmp->is_valid(), "do not need temporary"); 3788 if (left->as_xmm_double_reg() != dest->as_xmm_double_reg()) { 3789 __ movdbl(dest->as_xmm_double_reg(), left->as_xmm_double_reg()); 3790 } 3791 __ xorpd(dest->as_xmm_double_reg(), 3792 ExternalAddress((address)double_signflip_pool)); 3793 } 3794 } else if (left->is_single_fpu() || left->is_double_fpu()) { 3795 assert(left->fpu() == 0, "arg must be on TOS"); 3796 assert(dest->fpu() == 0, "dest must be TOS"); 3797 __ fchs(); 3798 3799 } else { 3800 ShouldNotReachHere(); 3801 } 3802 } 3803 3804 3805 void LIR_Assembler::leal(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) { 3806 assert(src->is_address(), "must be an address"); 3807 assert(dest->is_register(), "must be a register"); 3808 3809 PatchingStub* patch = NULL; 3810 if (patch_code != lir_patch_none) { 3811 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 3812 } 3813 3814 Register reg = dest->as_pointer_register(); 3815 LIR_Address* addr = src->as_address_ptr(); 3816 __ lea(reg, as_Address(addr)); 3817 3818 if (patch != NULL) { 3819 patching_epilog(patch, patch_code, addr->base()->as_register(), info); 3820 } 3821 } 3822 3823 3824 3825 void LIR_Assembler::rt_call(LIR_Opr result, address dest, const LIR_OprList* args, LIR_Opr tmp, CodeEmitInfo* info) { 3826 assert(!tmp->is_valid(), "don't need temporary"); 3827 __ call(RuntimeAddress(dest)); 3828 if (info != NULL) { 3829 add_call_info_here(info); 3830 } 3831 } 3832 3833 3834 void LIR_Assembler::volatile_move_op(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info) { 3835 assert(type == T_LONG, "only for volatile long fields"); 3836 3837 if (info != NULL) { 3838 add_debug_info_for_null_check_here(info); 3839 } 3840 3841 if (src->is_double_xmm()) { 3842 if (dest->is_double_cpu()) { 3843 #ifdef _LP64 3844 __ movdq(dest->as_register_lo(), src->as_xmm_double_reg()); 3845 #else 3846 __ movdl(dest->as_register_lo(), src->as_xmm_double_reg()); 3847 __ psrlq(src->as_xmm_double_reg(), 32); 3848 __ movdl(dest->as_register_hi(), src->as_xmm_double_reg()); 3849 #endif // _LP64 3850 } else if (dest->is_double_stack()) { 3851 __ movdbl(frame_map()->address_for_slot(dest->double_stack_ix()), src->as_xmm_double_reg()); 3852 } else if (dest->is_address()) { 3853 __ movdbl(as_Address(dest->as_address_ptr()), src->as_xmm_double_reg()); 3854 } else { 3855 ShouldNotReachHere(); 3856 } 3857 3858 } else if (dest->is_double_xmm()) { 3859 if (src->is_double_stack()) { 3860 __ movdbl(dest->as_xmm_double_reg(), frame_map()->address_for_slot(src->double_stack_ix())); 3861 } else if (src->is_address()) { 3862 __ movdbl(dest->as_xmm_double_reg(), as_Address(src->as_address_ptr())); 3863 } else { 3864 ShouldNotReachHere(); 3865 } 3866 3867 } else if (src->is_double_fpu()) { 3868 assert(src->fpu_regnrLo() == 0, "must be TOS"); 3869 if (dest->is_double_stack()) { 3870 __ fistp_d(frame_map()->address_for_slot(dest->double_stack_ix())); 3871 } else if (dest->is_address()) { 3872 __ fistp_d(as_Address(dest->as_address_ptr())); 3873 } else { 3874 ShouldNotReachHere(); 3875 } 3876 3877 } else if (dest->is_double_fpu()) { 3878 assert(dest->fpu_regnrLo() == 0, "must be TOS"); 3879 if (src->is_double_stack()) { 3880 __ fild_d(frame_map()->address_for_slot(src->double_stack_ix())); 3881 } else if (src->is_address()) { 3882 __ fild_d(as_Address(src->as_address_ptr())); 3883 } else { 3884 ShouldNotReachHere(); 3885 } 3886 } else { 3887 ShouldNotReachHere(); 3888 } 3889 } 3890 3891 #ifdef ASSERT 3892 // emit run-time assertion 3893 void LIR_Assembler::emit_assert(LIR_OpAssert* op) { 3894 assert(op->code() == lir_assert, "must be"); 3895 3896 if (op->in_opr1()->is_valid()) { 3897 assert(op->in_opr2()->is_valid(), "both operands must be valid"); 3898 comp_op(op->condition(), op->in_opr1(), op->in_opr2(), op); 3899 } else { 3900 assert(op->in_opr2()->is_illegal(), "both operands must be illegal"); 3901 assert(op->condition() == lir_cond_always, "no other conditions allowed"); 3902 } 3903 3904 Label ok; 3905 if (op->condition() != lir_cond_always) { 3906 Assembler::Condition acond = Assembler::zero; 3907 switch (op->condition()) { 3908 case lir_cond_equal: acond = Assembler::equal; break; 3909 case lir_cond_notEqual: acond = Assembler::notEqual; break; 3910 case lir_cond_less: acond = Assembler::less; break; 3911 case lir_cond_lessEqual: acond = Assembler::lessEqual; break; 3912 case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break; 3913 case lir_cond_greater: acond = Assembler::greater; break; 3914 case lir_cond_belowEqual: acond = Assembler::belowEqual; break; 3915 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; break; 3916 default: ShouldNotReachHere(); 3917 } 3918 __ jcc(acond, ok); 3919 } 3920 if (op->halt()) { 3921 const char* str = __ code_string(op->msg()); 3922 __ stop(str); 3923 } else { 3924 breakpoint(); 3925 } 3926 __ bind(ok); 3927 } 3928 #endif 3929 3930 void LIR_Assembler::membar() { 3931 // QQQ sparc TSO uses this, 3932 __ membar( Assembler::Membar_mask_bits(Assembler::StoreLoad)); 3933 } 3934 3935 void LIR_Assembler::membar_acquire() { 3936 // No x86 machines currently require load fences 3937 } 3938 3939 void LIR_Assembler::membar_release() { 3940 // No x86 machines currently require store fences 3941 } 3942 3943 void LIR_Assembler::membar_loadload() { 3944 // no-op 3945 //__ membar(Assembler::Membar_mask_bits(Assembler::loadload)); 3946 } 3947 3948 void LIR_Assembler::membar_storestore() { 3949 // no-op 3950 //__ membar(Assembler::Membar_mask_bits(Assembler::storestore)); 3951 } 3952 3953 void LIR_Assembler::membar_loadstore() { 3954 // no-op 3955 //__ membar(Assembler::Membar_mask_bits(Assembler::loadstore)); 3956 } 3957 3958 void LIR_Assembler::membar_storeload() { 3959 __ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad)); 3960 } 3961 3962 void LIR_Assembler::on_spin_wait() { 3963 __ pause (); 3964 } 3965 3966 void LIR_Assembler::get_thread(LIR_Opr result_reg) { 3967 assert(result_reg->is_register(), "check"); 3968 #ifdef _LP64 3969 // __ get_thread(result_reg->as_register_lo()); 3970 __ mov(result_reg->as_register(), r15_thread); 3971 #else 3972 __ get_thread(result_reg->as_register()); 3973 #endif // _LP64 3974 } 3975 3976 3977 void LIR_Assembler::peephole(LIR_List*) { 3978 // do nothing for now 3979 } 3980 3981 void LIR_Assembler::atomic_op(LIR_Code code, LIR_Opr src, LIR_Opr data, LIR_Opr dest, LIR_Opr tmp) { 3982 assert(data == dest, "xchg/xadd uses only 2 operands"); 3983 3984 if (data->type() == T_INT) { 3985 if (code == lir_xadd) { 3986 __ lock(); 3987 __ xaddl(as_Address(src->as_address_ptr()), data->as_register()); 3988 } else { 3989 __ xchgl(data->as_register(), as_Address(src->as_address_ptr())); 3990 } 3991 } else if (data->is_oop()) { 3992 assert (code == lir_xchg, "xadd for oops"); 3993 Register obj = data->as_register(); 3994 #ifdef _LP64 3995 if (UseCompressedOops) { 3996 __ encode_heap_oop(obj); 3997 __ xchgl(obj, as_Address(src->as_address_ptr())); 3998 __ decode_heap_oop(obj); 3999 } else { 4000 __ xchgptr(obj, as_Address(src->as_address_ptr())); 4001 } 4002 #else 4003 __ xchgl(obj, as_Address(src->as_address_ptr())); 4004 #endif 4005 } else if (data->type() == T_LONG) { 4006 #ifdef _LP64 4007 assert(data->as_register_lo() == data->as_register_hi(), "should be a single register"); 4008 if (code == lir_xadd) { 4009 __ lock(); 4010 __ xaddq(as_Address(src->as_address_ptr()), data->as_register_lo()); 4011 } else { 4012 __ xchgq(data->as_register_lo(), as_Address(src->as_address_ptr())); 4013 } 4014 #else 4015 ShouldNotReachHere(); 4016 #endif 4017 } else { 4018 ShouldNotReachHere(); 4019 } 4020 } 4021 4022 #undef __