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) { 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 void LIR_Assembler::clinit_barrier(ciMethod* method) { 363 assert(VM_Version::supports_fast_class_init_checks(), "sanity"); 364 assert(!method->holder()->is_not_initialized(), "initialization should have been started"); 365 366 Label L_skip_barrier; 367 Register klass = rscratch1; 368 Register thread = LP64_ONLY( r15_thread ) NOT_LP64( noreg ); 369 assert(thread != noreg, "x86_32 not implemented"); 370 371 __ mov_metadata(klass, method->holder()->constant_encoding()); 372 __ clinit_barrier(klass, thread, &L_skip_barrier /*L_fast_path*/); 373 374 __ jump(RuntimeAddress(SharedRuntime::get_handle_wrong_method_stub())); 375 376 __ bind(L_skip_barrier); 377 } 378 379 void LIR_Assembler::jobject2reg_with_patching(Register reg, CodeEmitInfo* info) { 380 jobject o = NULL; 381 PatchingStub* patch = new PatchingStub(_masm, patching_id(info)); 382 __ movoop(reg, o); 383 patching_epilog(patch, lir_patch_normal, reg, info); 384 } 385 386 void LIR_Assembler::klass2reg_with_patching(Register reg, CodeEmitInfo* info) { 387 Metadata* o = NULL; 388 PatchingStub* patch = new PatchingStub(_masm, PatchingStub::load_klass_id); 389 __ mov_metadata(reg, o); 390 patching_epilog(patch, lir_patch_normal, reg, info); 391 } 392 393 // This specifies the rsp decrement needed to build the frame 394 int LIR_Assembler::initial_frame_size_in_bytes() const { 395 // if rounding, must let FrameMap know! 396 397 // The frame_map records size in slots (32bit word) 398 399 // subtract two words to account for return address and link 400 return (frame_map()->framesize() - (2*VMRegImpl::slots_per_word)) * VMRegImpl::stack_slot_size; 401 } 402 403 404 int LIR_Assembler::emit_exception_handler() { 405 // if the last instruction is a call (typically to do a throw which 406 // is coming at the end after block reordering) the return address 407 // must still point into the code area in order to avoid assertion 408 // failures when searching for the corresponding bci => add a nop 409 // (was bug 5/14/1999 - gri) 410 __ nop(); 411 412 // generate code for exception handler 413 address handler_base = __ start_a_stub(exception_handler_size()); 414 if (handler_base == NULL) { 415 // not enough space left for the handler 416 bailout("exception handler overflow"); 417 return -1; 418 } 419 420 int offset = code_offset(); 421 422 // the exception oop and pc are in rax, and rdx 423 // no other registers need to be preserved, so invalidate them 424 __ invalidate_registers(false, true, true, false, true, true); 425 426 // check that there is really an exception 427 __ verify_not_null_oop(rax); 428 429 // search an exception handler (rax: exception oop, rdx: throwing pc) 430 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::handle_exception_from_callee_id))); 431 __ should_not_reach_here(); 432 guarantee(code_offset() - offset <= exception_handler_size(), "overflow"); 433 __ end_a_stub(); 434 435 return offset; 436 } 437 438 439 // Emit the code to remove the frame from the stack in the exception 440 // unwind path. 441 int LIR_Assembler::emit_unwind_handler() { 442 #ifndef PRODUCT 443 if (CommentedAssembly) { 444 _masm->block_comment("Unwind handler"); 445 } 446 #endif 447 448 int offset = code_offset(); 449 450 // Fetch the exception from TLS and clear out exception related thread state 451 Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread); 452 NOT_LP64(__ get_thread(rsi)); 453 __ movptr(rax, Address(thread, JavaThread::exception_oop_offset())); 454 __ movptr(Address(thread, JavaThread::exception_oop_offset()), (intptr_t)NULL_WORD); 455 __ movptr(Address(thread, JavaThread::exception_pc_offset()), (intptr_t)NULL_WORD); 456 457 __ bind(_unwind_handler_entry); 458 __ verify_not_null_oop(rax); 459 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) { 460 __ mov(rbx, rax); // Preserve the exception (rbx is always callee-saved) 461 } 462 463 // Preform needed unlocking 464 MonitorExitStub* stub = NULL; 465 if (method()->is_synchronized()) { 466 monitor_address(0, FrameMap::rax_opr); 467 stub = new MonitorExitStub(FrameMap::rax_opr, true, 0); 468 __ unlock_object(rdi, rsi, rax, *stub->entry()); 469 __ bind(*stub->continuation()); 470 } 471 472 if (compilation()->env()->dtrace_method_probes()) { 473 #ifdef _LP64 474 __ mov(rdi, r15_thread); 475 __ mov_metadata(rsi, method()->constant_encoding()); 476 #else 477 __ get_thread(rax); 478 __ movptr(Address(rsp, 0), rax); 479 __ mov_metadata(Address(rsp, sizeof(void*)), method()->constant_encoding()); 480 #endif 481 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit))); 482 } 483 484 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) { 485 __ mov(rax, rbx); // Restore the exception 486 } 487 488 // remove the activation and dispatch to the unwind handler 489 __ remove_frame(initial_frame_size_in_bytes()); 490 __ jump(RuntimeAddress(Runtime1::entry_for(Runtime1::unwind_exception_id))); 491 492 // Emit the slow path assembly 493 if (stub != NULL) { 494 stub->emit_code(this); 495 } 496 497 return offset; 498 } 499 500 501 int LIR_Assembler::emit_deopt_handler() { 502 // if the last instruction is a call (typically to do a throw which 503 // is coming at the end after block reordering) the return address 504 // must still point into the code area in order to avoid assertion 505 // failures when searching for the corresponding bci => add a nop 506 // (was bug 5/14/1999 - gri) 507 __ nop(); 508 509 // generate code for exception handler 510 address handler_base = __ start_a_stub(deopt_handler_size()); 511 if (handler_base == NULL) { 512 // not enough space left for the handler 513 bailout("deopt handler overflow"); 514 return -1; 515 } 516 517 int offset = code_offset(); 518 InternalAddress here(__ pc()); 519 520 __ pushptr(here.addr()); 521 __ jump(RuntimeAddress(SharedRuntime::deopt_blob()->unpack())); 522 guarantee(code_offset() - offset <= deopt_handler_size(), "overflow"); 523 __ end_a_stub(); 524 525 return offset; 526 } 527 528 529 void LIR_Assembler::return_op(LIR_Opr result) { 530 assert(result->is_illegal() || !result->is_single_cpu() || result->as_register() == rax, "word returns are in rax,"); 531 if (!result->is_illegal() && result->is_float_kind() && !result->is_xmm_register()) { 532 assert(result->fpu() == 0, "result must already be on TOS"); 533 } 534 535 // Pop the stack before the safepoint code 536 __ remove_frame(initial_frame_size_in_bytes()); 537 538 if (StackReservedPages > 0 && compilation()->has_reserved_stack_access()) { 539 __ reserved_stack_check(); 540 } 541 542 bool result_is_oop = result->is_valid() ? result->is_oop() : false; 543 544 // Note: we do not need to round double result; float result has the right precision 545 // the poll sets the condition code, but no data registers 546 547 if (SafepointMechanism::uses_thread_local_poll()) { 548 #ifdef _LP64 549 const Register poll_addr = rscratch1; 550 __ movptr(poll_addr, Address(r15_thread, Thread::polling_page_offset())); 551 #else 552 const Register poll_addr = rbx; 553 assert(FrameMap::is_caller_save_register(poll_addr), "will overwrite"); 554 __ get_thread(poll_addr); 555 __ movptr(poll_addr, Address(poll_addr, Thread::polling_page_offset())); 556 #endif 557 __ relocate(relocInfo::poll_return_type); 558 __ testl(rax, Address(poll_addr, 0)); 559 } else { 560 AddressLiteral polling_page(os::get_polling_page(), relocInfo::poll_return_type); 561 562 if (Assembler::is_polling_page_far()) { 563 __ lea(rscratch1, polling_page); 564 __ relocate(relocInfo::poll_return_type); 565 __ testl(rax, Address(rscratch1, 0)); 566 } else { 567 __ testl(rax, polling_page); 568 } 569 } 570 __ ret(0); 571 } 572 573 574 int LIR_Assembler::safepoint_poll(LIR_Opr tmp, CodeEmitInfo* info) { 575 guarantee(info != NULL, "Shouldn't be NULL"); 576 int offset = __ offset(); 577 if (SafepointMechanism::uses_thread_local_poll()) { 578 #ifdef _LP64 579 const Register poll_addr = rscratch1; 580 __ movptr(poll_addr, Address(r15_thread, Thread::polling_page_offset())); 581 #else 582 assert(tmp->is_cpu_register(), "needed"); 583 const Register poll_addr = tmp->as_register(); 584 __ get_thread(poll_addr); 585 __ movptr(poll_addr, Address(poll_addr, in_bytes(Thread::polling_page_offset()))); 586 #endif 587 add_debug_info_for_branch(info); 588 __ relocate(relocInfo::poll_type); 589 address pre_pc = __ pc(); 590 __ testl(rax, Address(poll_addr, 0)); 591 address post_pc = __ pc(); 592 guarantee(pointer_delta(post_pc, pre_pc, 1) == 2 LP64_ONLY(+1), "must be exact length"); 593 } else { 594 AddressLiteral polling_page(os::get_polling_page(), relocInfo::poll_type); 595 if (Assembler::is_polling_page_far()) { 596 __ lea(rscratch1, polling_page); 597 offset = __ offset(); 598 add_debug_info_for_branch(info); 599 __ relocate(relocInfo::poll_type); 600 __ testl(rax, Address(rscratch1, 0)); 601 } else { 602 add_debug_info_for_branch(info); 603 __ testl(rax, polling_page); 604 } 605 } 606 return offset; 607 } 608 609 610 void LIR_Assembler::move_regs(Register from_reg, Register to_reg) { 611 if (from_reg != to_reg) __ mov(to_reg, from_reg); 612 } 613 614 void LIR_Assembler::swap_reg(Register a, Register b) { 615 __ xchgptr(a, b); 616 } 617 618 619 void LIR_Assembler::const2reg(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) { 620 assert(src->is_constant(), "should not call otherwise"); 621 assert(dest->is_register(), "should not call otherwise"); 622 LIR_Const* c = src->as_constant_ptr(); 623 624 switch (c->type()) { 625 case T_INT: { 626 assert(patch_code == lir_patch_none, "no patching handled here"); 627 __ movl(dest->as_register(), c->as_jint()); 628 break; 629 } 630 631 case T_ADDRESS: { 632 assert(patch_code == lir_patch_none, "no patching handled here"); 633 __ movptr(dest->as_register(), c->as_jint()); 634 break; 635 } 636 637 case T_LONG: { 638 assert(patch_code == lir_patch_none, "no patching handled here"); 639 #ifdef _LP64 640 __ movptr(dest->as_register_lo(), (intptr_t)c->as_jlong()); 641 #else 642 __ movptr(dest->as_register_lo(), c->as_jint_lo()); 643 __ movptr(dest->as_register_hi(), c->as_jint_hi()); 644 #endif // _LP64 645 break; 646 } 647 648 case T_OBJECT: { 649 if (patch_code != lir_patch_none) { 650 jobject2reg_with_patching(dest->as_register(), info); 651 } else { 652 __ movoop(dest->as_register(), c->as_jobject()); 653 } 654 break; 655 } 656 657 case T_METADATA: { 658 if (patch_code != lir_patch_none) { 659 klass2reg_with_patching(dest->as_register(), info); 660 } else { 661 __ mov_metadata(dest->as_register(), c->as_metadata()); 662 } 663 break; 664 } 665 666 case T_FLOAT: { 667 if (dest->is_single_xmm()) { 668 if (LP64_ONLY(UseAVX <= 2 &&) c->is_zero_float()) { 669 __ xorps(dest->as_xmm_float_reg(), dest->as_xmm_float_reg()); 670 } else { 671 __ movflt(dest->as_xmm_float_reg(), 672 InternalAddress(float_constant(c->as_jfloat()))); 673 } 674 } else { 675 assert(dest->is_single_fpu(), "must be"); 676 assert(dest->fpu_regnr() == 0, "dest must be TOS"); 677 if (c->is_zero_float()) { 678 __ fldz(); 679 } else if (c->is_one_float()) { 680 __ fld1(); 681 } else { 682 __ fld_s (InternalAddress(float_constant(c->as_jfloat()))); 683 } 684 } 685 break; 686 } 687 688 case T_DOUBLE: { 689 if (dest->is_double_xmm()) { 690 if (LP64_ONLY(UseAVX <= 2 &&) c->is_zero_double()) { 691 __ xorpd(dest->as_xmm_double_reg(), dest->as_xmm_double_reg()); 692 } else { 693 __ movdbl(dest->as_xmm_double_reg(), 694 InternalAddress(double_constant(c->as_jdouble()))); 695 } 696 } else { 697 assert(dest->is_double_fpu(), "must be"); 698 assert(dest->fpu_regnrLo() == 0, "dest must be TOS"); 699 if (c->is_zero_double()) { 700 __ fldz(); 701 } else if (c->is_one_double()) { 702 __ fld1(); 703 } else { 704 __ fld_d (InternalAddress(double_constant(c->as_jdouble()))); 705 } 706 } 707 break; 708 } 709 710 default: 711 ShouldNotReachHere(); 712 } 713 } 714 715 void LIR_Assembler::const2stack(LIR_Opr src, LIR_Opr dest) { 716 assert(src->is_constant(), "should not call otherwise"); 717 assert(dest->is_stack(), "should not call otherwise"); 718 LIR_Const* c = src->as_constant_ptr(); 719 720 switch (c->type()) { 721 case T_INT: // fall through 722 case T_FLOAT: 723 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits()); 724 break; 725 726 case T_ADDRESS: 727 __ movptr(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits()); 728 break; 729 730 case T_OBJECT: 731 __ movoop(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jobject()); 732 break; 733 734 case T_LONG: // fall through 735 case T_DOUBLE: 736 #ifdef _LP64 737 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(), 738 lo_word_offset_in_bytes), (intptr_t)c->as_jlong_bits()); 739 #else 740 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(), 741 lo_word_offset_in_bytes), c->as_jint_lo_bits()); 742 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(), 743 hi_word_offset_in_bytes), c->as_jint_hi_bits()); 744 #endif // _LP64 745 break; 746 747 default: 748 ShouldNotReachHere(); 749 } 750 } 751 752 void LIR_Assembler::const2mem(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info, bool wide) { 753 assert(src->is_constant(), "should not call otherwise"); 754 assert(dest->is_address(), "should not call otherwise"); 755 LIR_Const* c = src->as_constant_ptr(); 756 LIR_Address* addr = dest->as_address_ptr(); 757 758 int null_check_here = code_offset(); 759 switch (type) { 760 case T_INT: // fall through 761 case T_FLOAT: 762 __ movl(as_Address(addr), c->as_jint_bits()); 763 break; 764 765 case T_ADDRESS: 766 __ movptr(as_Address(addr), c->as_jint_bits()); 767 break; 768 769 case T_OBJECT: // fall through 770 case T_ARRAY: 771 if (c->as_jobject() == NULL) { 772 if (UseCompressedOops && !wide) { 773 __ movl(as_Address(addr), (int32_t)NULL_WORD); 774 } else { 775 #ifdef _LP64 776 __ xorptr(rscratch1, rscratch1); 777 null_check_here = code_offset(); 778 __ movptr(as_Address(addr), rscratch1); 779 #else 780 __ movptr(as_Address(addr), NULL_WORD); 781 #endif 782 } 783 } else { 784 if (is_literal_address(addr)) { 785 ShouldNotReachHere(); 786 __ movoop(as_Address(addr, noreg), c->as_jobject()); 787 } else { 788 #ifdef _LP64 789 __ movoop(rscratch1, c->as_jobject()); 790 if (UseCompressedOops && !wide) { 791 __ encode_heap_oop(rscratch1); 792 null_check_here = code_offset(); 793 __ movl(as_Address_lo(addr), rscratch1); 794 } else { 795 null_check_here = code_offset(); 796 __ movptr(as_Address_lo(addr), rscratch1); 797 } 798 #else 799 __ movoop(as_Address(addr), c->as_jobject()); 800 #endif 801 } 802 } 803 break; 804 805 case T_LONG: // fall through 806 case T_DOUBLE: 807 #ifdef _LP64 808 if (is_literal_address(addr)) { 809 ShouldNotReachHere(); 810 __ movptr(as_Address(addr, r15_thread), (intptr_t)c->as_jlong_bits()); 811 } else { 812 __ movptr(r10, (intptr_t)c->as_jlong_bits()); 813 null_check_here = code_offset(); 814 __ movptr(as_Address_lo(addr), r10); 815 } 816 #else 817 // Always reachable in 32bit so this doesn't produce useless move literal 818 __ movptr(as_Address_hi(addr), c->as_jint_hi_bits()); 819 __ movptr(as_Address_lo(addr), c->as_jint_lo_bits()); 820 #endif // _LP64 821 break; 822 823 case T_BOOLEAN: // fall through 824 case T_BYTE: 825 __ movb(as_Address(addr), c->as_jint() & 0xFF); 826 break; 827 828 case T_CHAR: // fall through 829 case T_SHORT: 830 __ movw(as_Address(addr), c->as_jint() & 0xFFFF); 831 break; 832 833 default: 834 ShouldNotReachHere(); 835 }; 836 837 if (info != NULL) { 838 add_debug_info_for_null_check(null_check_here, info); 839 } 840 } 841 842 843 void LIR_Assembler::reg2reg(LIR_Opr src, LIR_Opr dest) { 844 assert(src->is_register(), "should not call otherwise"); 845 assert(dest->is_register(), "should not call otherwise"); 846 847 // move between cpu-registers 848 if (dest->is_single_cpu()) { 849 #ifdef _LP64 850 if (src->type() == T_LONG) { 851 // Can do LONG -> OBJECT 852 move_regs(src->as_register_lo(), dest->as_register()); 853 return; 854 } 855 #endif 856 assert(src->is_single_cpu(), "must match"); 857 if (src->type() == T_OBJECT) { 858 __ verify_oop(src->as_register()); 859 } 860 move_regs(src->as_register(), dest->as_register()); 861 862 } else if (dest->is_double_cpu()) { 863 #ifdef _LP64 864 if (src->type() == T_OBJECT || src->type() == T_ARRAY) { 865 // Surprising to me but we can see move of a long to t_object 866 __ verify_oop(src->as_register()); 867 move_regs(src->as_register(), dest->as_register_lo()); 868 return; 869 } 870 #endif 871 assert(src->is_double_cpu(), "must match"); 872 Register f_lo = src->as_register_lo(); 873 Register f_hi = src->as_register_hi(); 874 Register t_lo = dest->as_register_lo(); 875 Register t_hi = dest->as_register_hi(); 876 #ifdef _LP64 877 assert(f_hi == f_lo, "must be same"); 878 assert(t_hi == t_lo, "must be same"); 879 move_regs(f_lo, t_lo); 880 #else 881 assert(f_lo != f_hi && t_lo != t_hi, "invalid register allocation"); 882 883 884 if (f_lo == t_hi && f_hi == t_lo) { 885 swap_reg(f_lo, f_hi); 886 } else if (f_hi == t_lo) { 887 assert(f_lo != t_hi, "overwriting register"); 888 move_regs(f_hi, t_hi); 889 move_regs(f_lo, t_lo); 890 } else { 891 assert(f_hi != t_lo, "overwriting register"); 892 move_regs(f_lo, t_lo); 893 move_regs(f_hi, t_hi); 894 } 895 #endif // LP64 896 897 // special moves from fpu-register to xmm-register 898 // necessary for method results 899 } else if (src->is_single_xmm() && !dest->is_single_xmm()) { 900 __ movflt(Address(rsp, 0), src->as_xmm_float_reg()); 901 __ fld_s(Address(rsp, 0)); 902 } else if (src->is_double_xmm() && !dest->is_double_xmm()) { 903 __ movdbl(Address(rsp, 0), src->as_xmm_double_reg()); 904 __ fld_d(Address(rsp, 0)); 905 } else if (dest->is_single_xmm() && !src->is_single_xmm()) { 906 __ fstp_s(Address(rsp, 0)); 907 __ movflt(dest->as_xmm_float_reg(), Address(rsp, 0)); 908 } else if (dest->is_double_xmm() && !src->is_double_xmm()) { 909 __ fstp_d(Address(rsp, 0)); 910 __ movdbl(dest->as_xmm_double_reg(), Address(rsp, 0)); 911 912 // move between xmm-registers 913 } else if (dest->is_single_xmm()) { 914 assert(src->is_single_xmm(), "must match"); 915 __ movflt(dest->as_xmm_float_reg(), src->as_xmm_float_reg()); 916 } else if (dest->is_double_xmm()) { 917 assert(src->is_double_xmm(), "must match"); 918 __ movdbl(dest->as_xmm_double_reg(), src->as_xmm_double_reg()); 919 920 // move between fpu-registers (no instruction necessary because of fpu-stack) 921 } else if (dest->is_single_fpu() || dest->is_double_fpu()) { 922 assert(src->is_single_fpu() || src->is_double_fpu(), "must match"); 923 assert(src->fpu() == dest->fpu(), "currently should be nothing to do"); 924 } else { 925 ShouldNotReachHere(); 926 } 927 } 928 929 void LIR_Assembler::reg2stack(LIR_Opr src, LIR_Opr dest, BasicType type, bool pop_fpu_stack) { 930 assert(src->is_register(), "should not call otherwise"); 931 assert(dest->is_stack(), "should not call otherwise"); 932 933 if (src->is_single_cpu()) { 934 Address dst = frame_map()->address_for_slot(dest->single_stack_ix()); 935 if (type == T_OBJECT || type == T_ARRAY) { 936 __ verify_oop(src->as_register()); 937 __ movptr (dst, src->as_register()); 938 } else if (type == T_METADATA) { 939 __ movptr (dst, src->as_register()); 940 } else { 941 __ movl (dst, src->as_register()); 942 } 943 944 } else if (src->is_double_cpu()) { 945 Address dstLO = frame_map()->address_for_slot(dest->double_stack_ix(), lo_word_offset_in_bytes); 946 Address dstHI = frame_map()->address_for_slot(dest->double_stack_ix(), hi_word_offset_in_bytes); 947 __ movptr (dstLO, src->as_register_lo()); 948 NOT_LP64(__ movptr (dstHI, src->as_register_hi())); 949 950 } else if (src->is_single_xmm()) { 951 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix()); 952 __ movflt(dst_addr, src->as_xmm_float_reg()); 953 954 } else if (src->is_double_xmm()) { 955 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix()); 956 __ movdbl(dst_addr, src->as_xmm_double_reg()); 957 958 } else if (src->is_single_fpu()) { 959 assert(src->fpu_regnr() == 0, "argument must be on TOS"); 960 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix()); 961 if (pop_fpu_stack) __ fstp_s (dst_addr); 962 else __ fst_s (dst_addr); 963 964 } else if (src->is_double_fpu()) { 965 assert(src->fpu_regnrLo() == 0, "argument must be on TOS"); 966 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix()); 967 if (pop_fpu_stack) __ fstp_d (dst_addr); 968 else __ fst_d (dst_addr); 969 970 } else { 971 ShouldNotReachHere(); 972 } 973 } 974 975 976 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 */) { 977 LIR_Address* to_addr = dest->as_address_ptr(); 978 PatchingStub* patch = NULL; 979 Register compressed_src = rscratch1; 980 981 if (type == T_ARRAY || type == T_OBJECT) { 982 __ verify_oop(src->as_register()); 983 #ifdef _LP64 984 if (UseCompressedOops && !wide) { 985 __ movptr(compressed_src, src->as_register()); 986 __ encode_heap_oop(compressed_src); 987 if (patch_code != lir_patch_none) { 988 info->oop_map()->set_narrowoop(compressed_src->as_VMReg()); 989 } 990 } 991 #endif 992 } 993 994 if (patch_code != lir_patch_none) { 995 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 996 Address toa = as_Address(to_addr); 997 assert(toa.disp() != 0, "must have"); 998 } 999 1000 int null_check_here = code_offset(); 1001 switch (type) { 1002 case T_FLOAT: { 1003 if (src->is_single_xmm()) { 1004 __ movflt(as_Address(to_addr), src->as_xmm_float_reg()); 1005 } else { 1006 assert(src->is_single_fpu(), "must be"); 1007 assert(src->fpu_regnr() == 0, "argument must be on TOS"); 1008 if (pop_fpu_stack) __ fstp_s(as_Address(to_addr)); 1009 else __ fst_s (as_Address(to_addr)); 1010 } 1011 break; 1012 } 1013 1014 case T_DOUBLE: { 1015 if (src->is_double_xmm()) { 1016 __ movdbl(as_Address(to_addr), src->as_xmm_double_reg()); 1017 } else { 1018 assert(src->is_double_fpu(), "must be"); 1019 assert(src->fpu_regnrLo() == 0, "argument must be on TOS"); 1020 if (pop_fpu_stack) __ fstp_d(as_Address(to_addr)); 1021 else __ fst_d (as_Address(to_addr)); 1022 } 1023 break; 1024 } 1025 1026 case T_ARRAY: // fall through 1027 case T_OBJECT: // fall through 1028 if (UseCompressedOops && !wide) { 1029 __ movl(as_Address(to_addr), compressed_src); 1030 } else { 1031 __ movptr(as_Address(to_addr), src->as_register()); 1032 } 1033 break; 1034 case T_METADATA: 1035 // We get here to store a method pointer to the stack to pass to 1036 // a dtrace runtime call. This can't work on 64 bit with 1037 // compressed klass ptrs: T_METADATA can be a compressed klass 1038 // ptr or a 64 bit method pointer. 1039 LP64_ONLY(ShouldNotReachHere()); 1040 __ movptr(as_Address(to_addr), src->as_register()); 1041 break; 1042 case T_ADDRESS: 1043 __ movptr(as_Address(to_addr), src->as_register()); 1044 break; 1045 case T_INT: 1046 __ movl(as_Address(to_addr), src->as_register()); 1047 break; 1048 1049 case T_LONG: { 1050 Register from_lo = src->as_register_lo(); 1051 Register from_hi = src->as_register_hi(); 1052 #ifdef _LP64 1053 __ movptr(as_Address_lo(to_addr), from_lo); 1054 #else 1055 Register base = to_addr->base()->as_register(); 1056 Register index = noreg; 1057 if (to_addr->index()->is_register()) { 1058 index = to_addr->index()->as_register(); 1059 } 1060 if (base == from_lo || index == from_lo) { 1061 assert(base != from_hi, "can't be"); 1062 assert(index == noreg || (index != base && index != from_hi), "can't handle this"); 1063 __ movl(as_Address_hi(to_addr), from_hi); 1064 if (patch != NULL) { 1065 patching_epilog(patch, lir_patch_high, base, info); 1066 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1067 patch_code = lir_patch_low; 1068 } 1069 __ movl(as_Address_lo(to_addr), from_lo); 1070 } else { 1071 assert(index == noreg || (index != base && index != from_lo), "can't handle this"); 1072 __ movl(as_Address_lo(to_addr), from_lo); 1073 if (patch != NULL) { 1074 patching_epilog(patch, lir_patch_low, base, info); 1075 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1076 patch_code = lir_patch_high; 1077 } 1078 __ movl(as_Address_hi(to_addr), from_hi); 1079 } 1080 #endif // _LP64 1081 break; 1082 } 1083 1084 case T_BYTE: // fall through 1085 case T_BOOLEAN: { 1086 Register src_reg = src->as_register(); 1087 Address dst_addr = as_Address(to_addr); 1088 assert(VM_Version::is_P6() || src_reg->has_byte_register(), "must use byte registers if not P6"); 1089 __ movb(dst_addr, src_reg); 1090 break; 1091 } 1092 1093 case T_CHAR: // fall through 1094 case T_SHORT: 1095 __ movw(as_Address(to_addr), src->as_register()); 1096 break; 1097 1098 default: 1099 ShouldNotReachHere(); 1100 } 1101 if (info != NULL) { 1102 add_debug_info_for_null_check(null_check_here, info); 1103 } 1104 1105 if (patch_code != lir_patch_none) { 1106 patching_epilog(patch, patch_code, to_addr->base()->as_register(), info); 1107 } 1108 } 1109 1110 1111 void LIR_Assembler::stack2reg(LIR_Opr src, LIR_Opr dest, BasicType type) { 1112 assert(src->is_stack(), "should not call otherwise"); 1113 assert(dest->is_register(), "should not call otherwise"); 1114 1115 if (dest->is_single_cpu()) { 1116 if (type == T_ARRAY || type == T_OBJECT) { 1117 __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix())); 1118 __ verify_oop(dest->as_register()); 1119 } else if (type == T_METADATA) { 1120 __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix())); 1121 } else { 1122 __ movl(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix())); 1123 } 1124 1125 } else if (dest->is_double_cpu()) { 1126 Address src_addr_LO = frame_map()->address_for_slot(src->double_stack_ix(), lo_word_offset_in_bytes); 1127 Address src_addr_HI = frame_map()->address_for_slot(src->double_stack_ix(), hi_word_offset_in_bytes); 1128 __ movptr(dest->as_register_lo(), src_addr_LO); 1129 NOT_LP64(__ movptr(dest->as_register_hi(), src_addr_HI)); 1130 1131 } else if (dest->is_single_xmm()) { 1132 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix()); 1133 __ movflt(dest->as_xmm_float_reg(), src_addr); 1134 1135 } else if (dest->is_double_xmm()) { 1136 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix()); 1137 __ movdbl(dest->as_xmm_double_reg(), src_addr); 1138 1139 } else if (dest->is_single_fpu()) { 1140 assert(dest->fpu_regnr() == 0, "dest must be TOS"); 1141 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix()); 1142 __ fld_s(src_addr); 1143 1144 } else if (dest->is_double_fpu()) { 1145 assert(dest->fpu_regnrLo() == 0, "dest must be TOS"); 1146 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix()); 1147 __ fld_d(src_addr); 1148 1149 } else { 1150 ShouldNotReachHere(); 1151 } 1152 } 1153 1154 1155 void LIR_Assembler::stack2stack(LIR_Opr src, LIR_Opr dest, BasicType type) { 1156 if (src->is_single_stack()) { 1157 if (type == T_OBJECT || type == T_ARRAY) { 1158 __ pushptr(frame_map()->address_for_slot(src ->single_stack_ix())); 1159 __ popptr (frame_map()->address_for_slot(dest->single_stack_ix())); 1160 } else { 1161 #ifndef _LP64 1162 __ pushl(frame_map()->address_for_slot(src ->single_stack_ix())); 1163 __ popl (frame_map()->address_for_slot(dest->single_stack_ix())); 1164 #else 1165 //no pushl on 64bits 1166 __ movl(rscratch1, frame_map()->address_for_slot(src ->single_stack_ix())); 1167 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), rscratch1); 1168 #endif 1169 } 1170 1171 } else if (src->is_double_stack()) { 1172 #ifdef _LP64 1173 __ pushptr(frame_map()->address_for_slot(src ->double_stack_ix())); 1174 __ popptr (frame_map()->address_for_slot(dest->double_stack_ix())); 1175 #else 1176 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 0)); 1177 // push and pop the part at src + wordSize, adding wordSize for the previous push 1178 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 2 * wordSize)); 1179 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 2 * wordSize)); 1180 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 0)); 1181 #endif // _LP64 1182 1183 } else { 1184 ShouldNotReachHere(); 1185 } 1186 } 1187 1188 1189 void LIR_Assembler::mem2reg(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool wide, bool /* unaligned */) { 1190 assert(src->is_address(), "should not call otherwise"); 1191 assert(dest->is_register(), "should not call otherwise"); 1192 1193 LIR_Address* addr = src->as_address_ptr(); 1194 Address from_addr = as_Address(addr); 1195 1196 if (addr->base()->type() == T_OBJECT) { 1197 __ verify_oop(addr->base()->as_pointer_register()); 1198 } 1199 1200 switch (type) { 1201 case T_BOOLEAN: // fall through 1202 case T_BYTE: // fall through 1203 case T_CHAR: // fall through 1204 case T_SHORT: 1205 if (!VM_Version::is_P6() && !from_addr.uses(dest->as_register())) { 1206 // on pre P6 processors we may get partial register stalls 1207 // so blow away the value of to_rinfo before loading a 1208 // partial word into it. Do it here so that it precedes 1209 // the potential patch point below. 1210 __ xorptr(dest->as_register(), dest->as_register()); 1211 } 1212 break; 1213 default: 1214 break; 1215 } 1216 1217 PatchingStub* patch = NULL; 1218 if (patch_code != lir_patch_none) { 1219 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1220 assert(from_addr.disp() != 0, "must have"); 1221 } 1222 if (info != NULL) { 1223 add_debug_info_for_null_check_here(info); 1224 } 1225 1226 switch (type) { 1227 case T_FLOAT: { 1228 if (dest->is_single_xmm()) { 1229 __ movflt(dest->as_xmm_float_reg(), from_addr); 1230 } else { 1231 assert(dest->is_single_fpu(), "must be"); 1232 assert(dest->fpu_regnr() == 0, "dest must be TOS"); 1233 __ fld_s(from_addr); 1234 } 1235 break; 1236 } 1237 1238 case T_DOUBLE: { 1239 if (dest->is_double_xmm()) { 1240 __ movdbl(dest->as_xmm_double_reg(), from_addr); 1241 } else { 1242 assert(dest->is_double_fpu(), "must be"); 1243 assert(dest->fpu_regnrLo() == 0, "dest must be TOS"); 1244 __ fld_d(from_addr); 1245 } 1246 break; 1247 } 1248 1249 case T_OBJECT: // fall through 1250 case T_ARRAY: // fall through 1251 if (UseCompressedOops && !wide) { 1252 __ movl(dest->as_register(), from_addr); 1253 } else { 1254 __ movptr(dest->as_register(), from_addr); 1255 } 1256 break; 1257 1258 case T_ADDRESS: 1259 if (UseCompressedClassPointers && addr->disp() == oopDesc::klass_offset_in_bytes()) { 1260 __ movl(dest->as_register(), from_addr); 1261 } else { 1262 __ movptr(dest->as_register(), from_addr); 1263 } 1264 break; 1265 case T_INT: 1266 __ movl(dest->as_register(), from_addr); 1267 break; 1268 1269 case T_LONG: { 1270 Register to_lo = dest->as_register_lo(); 1271 Register to_hi = dest->as_register_hi(); 1272 #ifdef _LP64 1273 __ movptr(to_lo, as_Address_lo(addr)); 1274 #else 1275 Register base = addr->base()->as_register(); 1276 Register index = noreg; 1277 if (addr->index()->is_register()) { 1278 index = addr->index()->as_register(); 1279 } 1280 if ((base == to_lo && index == to_hi) || 1281 (base == to_hi && index == to_lo)) { 1282 // addresses with 2 registers are only formed as a result of 1283 // array access so this code will never have to deal with 1284 // patches or null checks. 1285 assert(info == NULL && patch == NULL, "must be"); 1286 __ lea(to_hi, as_Address(addr)); 1287 __ movl(to_lo, Address(to_hi, 0)); 1288 __ movl(to_hi, Address(to_hi, BytesPerWord)); 1289 } else if (base == to_lo || index == to_lo) { 1290 assert(base != to_hi, "can't be"); 1291 assert(index == noreg || (index != base && index != to_hi), "can't handle this"); 1292 __ movl(to_hi, as_Address_hi(addr)); 1293 if (patch != NULL) { 1294 patching_epilog(patch, lir_patch_high, base, info); 1295 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1296 patch_code = lir_patch_low; 1297 } 1298 __ movl(to_lo, as_Address_lo(addr)); 1299 } else { 1300 assert(index == noreg || (index != base && index != to_lo), "can't handle this"); 1301 __ movl(to_lo, as_Address_lo(addr)); 1302 if (patch != NULL) { 1303 patching_epilog(patch, lir_patch_low, base, info); 1304 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1305 patch_code = lir_patch_high; 1306 } 1307 __ movl(to_hi, as_Address_hi(addr)); 1308 } 1309 #endif // _LP64 1310 break; 1311 } 1312 1313 case T_BOOLEAN: // fall through 1314 case T_BYTE: { 1315 Register dest_reg = dest->as_register(); 1316 assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6"); 1317 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) { 1318 __ movsbl(dest_reg, from_addr); 1319 } else { 1320 __ movb(dest_reg, from_addr); 1321 __ shll(dest_reg, 24); 1322 __ sarl(dest_reg, 24); 1323 } 1324 break; 1325 } 1326 1327 case T_CHAR: { 1328 Register dest_reg = dest->as_register(); 1329 assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6"); 1330 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) { 1331 __ movzwl(dest_reg, from_addr); 1332 } else { 1333 __ movw(dest_reg, from_addr); 1334 } 1335 break; 1336 } 1337 1338 case T_SHORT: { 1339 Register dest_reg = dest->as_register(); 1340 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) { 1341 __ movswl(dest_reg, from_addr); 1342 } else { 1343 __ movw(dest_reg, from_addr); 1344 __ shll(dest_reg, 16); 1345 __ sarl(dest_reg, 16); 1346 } 1347 break; 1348 } 1349 1350 default: 1351 ShouldNotReachHere(); 1352 } 1353 1354 if (patch != NULL) { 1355 patching_epilog(patch, patch_code, addr->base()->as_register(), info); 1356 } 1357 1358 if (type == T_ARRAY || type == T_OBJECT) { 1359 #ifdef _LP64 1360 if (UseCompressedOops && !wide) { 1361 __ decode_heap_oop(dest->as_register()); 1362 } 1363 #endif 1364 1365 // Load barrier has not yet been applied, so ZGC can't verify the oop here 1366 if (!UseZGC) { 1367 __ verify_oop(dest->as_register()); 1368 } 1369 } else if (type == T_ADDRESS && addr->disp() == oopDesc::klass_offset_in_bytes()) { 1370 #ifdef _LP64 1371 if (UseCompressedClassPointers) { 1372 __ decode_klass_not_null(dest->as_register()); 1373 } 1374 #endif 1375 } 1376 } 1377 1378 1379 NEEDS_CLEANUP; // This could be static? 1380 Address::ScaleFactor LIR_Assembler::array_element_size(BasicType type) const { 1381 int elem_size = type2aelembytes(type); 1382 switch (elem_size) { 1383 case 1: return Address::times_1; 1384 case 2: return Address::times_2; 1385 case 4: return Address::times_4; 1386 case 8: return Address::times_8; 1387 } 1388 ShouldNotReachHere(); 1389 return Address::no_scale; 1390 } 1391 1392 1393 void LIR_Assembler::emit_op3(LIR_Op3* op) { 1394 switch (op->code()) { 1395 case lir_idiv: 1396 case lir_irem: 1397 arithmetic_idiv(op->code(), 1398 op->in_opr1(), 1399 op->in_opr2(), 1400 op->in_opr3(), 1401 op->result_opr(), 1402 op->info()); 1403 break; 1404 case lir_fmad: 1405 __ fmad(op->result_opr()->as_xmm_double_reg(), 1406 op->in_opr1()->as_xmm_double_reg(), 1407 op->in_opr2()->as_xmm_double_reg(), 1408 op->in_opr3()->as_xmm_double_reg()); 1409 break; 1410 case lir_fmaf: 1411 __ fmaf(op->result_opr()->as_xmm_float_reg(), 1412 op->in_opr1()->as_xmm_float_reg(), 1413 op->in_opr2()->as_xmm_float_reg(), 1414 op->in_opr3()->as_xmm_float_reg()); 1415 break; 1416 default: ShouldNotReachHere(); break; 1417 } 1418 } 1419 1420 void LIR_Assembler::emit_opBranch(LIR_OpBranch* op) { 1421 #ifdef ASSERT 1422 assert(op->block() == NULL || op->block()->label() == op->label(), "wrong label"); 1423 if (op->block() != NULL) _branch_target_blocks.append(op->block()); 1424 if (op->ublock() != NULL) _branch_target_blocks.append(op->ublock()); 1425 #endif 1426 1427 if (op->cond() == lir_cond_always) { 1428 if (op->info() != NULL) add_debug_info_for_branch(op->info()); 1429 __ jmp (*(op->label())); 1430 } else { 1431 Assembler::Condition acond = Assembler::zero; 1432 if (op->code() == lir_cond_float_branch) { 1433 assert(op->ublock() != NULL, "must have unordered successor"); 1434 __ jcc(Assembler::parity, *(op->ublock()->label())); 1435 switch(op->cond()) { 1436 case lir_cond_equal: acond = Assembler::equal; break; 1437 case lir_cond_notEqual: acond = Assembler::notEqual; break; 1438 case lir_cond_less: acond = Assembler::below; break; 1439 case lir_cond_lessEqual: acond = Assembler::belowEqual; break; 1440 case lir_cond_greaterEqual: acond = Assembler::aboveEqual; break; 1441 case lir_cond_greater: acond = Assembler::above; break; 1442 default: ShouldNotReachHere(); 1443 } 1444 } else { 1445 switch (op->cond()) { 1446 case lir_cond_equal: acond = Assembler::equal; break; 1447 case lir_cond_notEqual: acond = Assembler::notEqual; break; 1448 case lir_cond_less: acond = Assembler::less; break; 1449 case lir_cond_lessEqual: acond = Assembler::lessEqual; break; 1450 case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break; 1451 case lir_cond_greater: acond = Assembler::greater; break; 1452 case lir_cond_belowEqual: acond = Assembler::belowEqual; break; 1453 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; break; 1454 default: ShouldNotReachHere(); 1455 } 1456 } 1457 __ jcc(acond,*(op->label())); 1458 } 1459 } 1460 1461 void LIR_Assembler::emit_opConvert(LIR_OpConvert* op) { 1462 LIR_Opr src = op->in_opr(); 1463 LIR_Opr dest = op->result_opr(); 1464 1465 switch (op->bytecode()) { 1466 case Bytecodes::_i2l: 1467 #ifdef _LP64 1468 __ movl2ptr(dest->as_register_lo(), src->as_register()); 1469 #else 1470 move_regs(src->as_register(), dest->as_register_lo()); 1471 move_regs(src->as_register(), dest->as_register_hi()); 1472 __ sarl(dest->as_register_hi(), 31); 1473 #endif // LP64 1474 break; 1475 1476 case Bytecodes::_l2i: 1477 #ifdef _LP64 1478 __ movl(dest->as_register(), src->as_register_lo()); 1479 #else 1480 move_regs(src->as_register_lo(), dest->as_register()); 1481 #endif 1482 break; 1483 1484 case Bytecodes::_i2b: 1485 move_regs(src->as_register(), dest->as_register()); 1486 __ sign_extend_byte(dest->as_register()); 1487 break; 1488 1489 case Bytecodes::_i2c: 1490 move_regs(src->as_register(), dest->as_register()); 1491 __ andl(dest->as_register(), 0xFFFF); 1492 break; 1493 1494 case Bytecodes::_i2s: 1495 move_regs(src->as_register(), dest->as_register()); 1496 __ sign_extend_short(dest->as_register()); 1497 break; 1498 1499 1500 case Bytecodes::_f2d: 1501 case Bytecodes::_d2f: 1502 if (dest->is_single_xmm()) { 1503 __ cvtsd2ss(dest->as_xmm_float_reg(), src->as_xmm_double_reg()); 1504 } else if (dest->is_double_xmm()) { 1505 __ cvtss2sd(dest->as_xmm_double_reg(), src->as_xmm_float_reg()); 1506 } else { 1507 assert(src->fpu() == dest->fpu(), "register must be equal"); 1508 // do nothing (float result is rounded later through spilling) 1509 } 1510 break; 1511 1512 case Bytecodes::_i2f: 1513 case Bytecodes::_i2d: 1514 if (dest->is_single_xmm()) { 1515 __ cvtsi2ssl(dest->as_xmm_float_reg(), src->as_register()); 1516 } else if (dest->is_double_xmm()) { 1517 __ cvtsi2sdl(dest->as_xmm_double_reg(), src->as_register()); 1518 } else { 1519 assert(dest->fpu() == 0, "result must be on TOS"); 1520 __ movl(Address(rsp, 0), src->as_register()); 1521 __ fild_s(Address(rsp, 0)); 1522 } 1523 break; 1524 1525 case Bytecodes::_f2i: 1526 case Bytecodes::_d2i: 1527 if (src->is_single_xmm()) { 1528 __ cvttss2sil(dest->as_register(), src->as_xmm_float_reg()); 1529 } else if (src->is_double_xmm()) { 1530 __ cvttsd2sil(dest->as_register(), src->as_xmm_double_reg()); 1531 } else { 1532 assert(src->fpu() == 0, "input must be on TOS"); 1533 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_trunc())); 1534 __ fist_s(Address(rsp, 0)); 1535 __ movl(dest->as_register(), Address(rsp, 0)); 1536 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); 1537 } 1538 1539 // IA32 conversion instructions do not match JLS for overflow, underflow and NaN -> fixup in stub 1540 assert(op->stub() != NULL, "stub required"); 1541 __ cmpl(dest->as_register(), 0x80000000); 1542 __ jcc(Assembler::equal, *op->stub()->entry()); 1543 __ bind(*op->stub()->continuation()); 1544 break; 1545 1546 case Bytecodes::_l2f: 1547 case Bytecodes::_l2d: 1548 assert(!dest->is_xmm_register(), "result in xmm register not supported (no SSE instruction present)"); 1549 assert(dest->fpu() == 0, "result must be on TOS"); 1550 1551 __ movptr(Address(rsp, 0), src->as_register_lo()); 1552 NOT_LP64(__ movl(Address(rsp, BytesPerWord), src->as_register_hi())); 1553 __ fild_d(Address(rsp, 0)); 1554 // float result is rounded later through spilling 1555 break; 1556 1557 case Bytecodes::_f2l: 1558 case Bytecodes::_d2l: 1559 assert(!src->is_xmm_register(), "input in xmm register not supported (no SSE instruction present)"); 1560 assert(src->fpu() == 0, "input must be on TOS"); 1561 assert(dest == FrameMap::long0_opr, "runtime stub places result in these registers"); 1562 1563 // instruction sequence too long to inline it here 1564 { 1565 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::fpu2long_stub_id))); 1566 } 1567 break; 1568 1569 default: ShouldNotReachHere(); 1570 } 1571 } 1572 1573 void LIR_Assembler::emit_alloc_obj(LIR_OpAllocObj* op) { 1574 if (op->init_check()) { 1575 add_debug_info_for_null_check_here(op->stub()->info()); 1576 __ cmpb(Address(op->klass()->as_register(), 1577 InstanceKlass::init_state_offset()), 1578 InstanceKlass::fully_initialized); 1579 __ jcc(Assembler::notEqual, *op->stub()->entry()); 1580 } 1581 __ allocate_object(op->obj()->as_register(), 1582 op->tmp1()->as_register(), 1583 op->tmp2()->as_register(), 1584 op->header_size(), 1585 op->object_size(), 1586 op->klass()->as_register(), 1587 *op->stub()->entry()); 1588 __ bind(*op->stub()->continuation()); 1589 } 1590 1591 void LIR_Assembler::emit_alloc_array(LIR_OpAllocArray* op) { 1592 Register len = op->len()->as_register(); 1593 LP64_ONLY( __ movslq(len, len); ) 1594 1595 if (UseSlowPath || 1596 (!UseFastNewObjectArray && (op->type() == T_OBJECT || op->type() == T_ARRAY)) || 1597 (!UseFastNewTypeArray && (op->type() != T_OBJECT && op->type() != T_ARRAY))) { 1598 __ jmp(*op->stub()->entry()); 1599 } else { 1600 Register tmp1 = op->tmp1()->as_register(); 1601 Register tmp2 = op->tmp2()->as_register(); 1602 Register tmp3 = op->tmp3()->as_register(); 1603 if (len == tmp1) { 1604 tmp1 = tmp3; 1605 } else if (len == tmp2) { 1606 tmp2 = tmp3; 1607 } else if (len == tmp3) { 1608 // everything is ok 1609 } else { 1610 __ mov(tmp3, len); 1611 } 1612 __ allocate_array(op->obj()->as_register(), 1613 len, 1614 tmp1, 1615 tmp2, 1616 arrayOopDesc::header_size(op->type()), 1617 array_element_size(op->type()), 1618 op->klass()->as_register(), 1619 *op->stub()->entry()); 1620 } 1621 __ bind(*op->stub()->continuation()); 1622 } 1623 1624 void LIR_Assembler::type_profile_helper(Register mdo, 1625 ciMethodData *md, ciProfileData *data, 1626 Register recv, Label* update_done) { 1627 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) { 1628 Label next_test; 1629 // See if the receiver is receiver[n]. 1630 __ cmpptr(recv, Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i)))); 1631 __ jccb(Assembler::notEqual, next_test); 1632 Address data_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i))); 1633 __ addptr(data_addr, DataLayout::counter_increment); 1634 __ jmp(*update_done); 1635 __ bind(next_test); 1636 } 1637 1638 // Didn't find receiver; find next empty slot and fill it in 1639 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) { 1640 Label next_test; 1641 Address recv_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i))); 1642 __ cmpptr(recv_addr, (intptr_t)NULL_WORD); 1643 __ jccb(Assembler::notEqual, next_test); 1644 __ movptr(recv_addr, recv); 1645 __ movptr(Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i))), DataLayout::counter_increment); 1646 __ jmp(*update_done); 1647 __ bind(next_test); 1648 } 1649 } 1650 1651 void LIR_Assembler::emit_typecheck_helper(LIR_OpTypeCheck *op, Label* success, Label* failure, Label* obj_is_null) { 1652 // we always need a stub for the failure case. 1653 CodeStub* stub = op->stub(); 1654 Register obj = op->object()->as_register(); 1655 Register k_RInfo = op->tmp1()->as_register(); 1656 Register klass_RInfo = op->tmp2()->as_register(); 1657 Register dst = op->result_opr()->as_register(); 1658 ciKlass* k = op->klass(); 1659 Register Rtmp1 = noreg; 1660 1661 // check if it needs to be profiled 1662 ciMethodData* md = NULL; 1663 ciProfileData* data = NULL; 1664 1665 if (op->should_profile()) { 1666 ciMethod* method = op->profiled_method(); 1667 assert(method != NULL, "Should have method"); 1668 int bci = op->profiled_bci(); 1669 md = method->method_data_or_null(); 1670 assert(md != NULL, "Sanity"); 1671 data = md->bci_to_data(bci); 1672 assert(data != NULL, "need data for type check"); 1673 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check"); 1674 } 1675 Label profile_cast_success, profile_cast_failure; 1676 Label *success_target = op->should_profile() ? &profile_cast_success : success; 1677 Label *failure_target = op->should_profile() ? &profile_cast_failure : failure; 1678 1679 if (obj == k_RInfo) { 1680 k_RInfo = dst; 1681 } else if (obj == klass_RInfo) { 1682 klass_RInfo = dst; 1683 } 1684 if (k->is_loaded() && !UseCompressedClassPointers) { 1685 select_different_registers(obj, dst, k_RInfo, klass_RInfo); 1686 } else { 1687 Rtmp1 = op->tmp3()->as_register(); 1688 select_different_registers(obj, dst, k_RInfo, klass_RInfo, Rtmp1); 1689 } 1690 1691 assert_different_registers(obj, k_RInfo, klass_RInfo); 1692 1693 __ cmpptr(obj, (int32_t)NULL_WORD); 1694 if (op->should_profile()) { 1695 Label not_null; 1696 __ jccb(Assembler::notEqual, not_null); 1697 // Object is null; update MDO and exit 1698 Register mdo = klass_RInfo; 1699 __ mov_metadata(mdo, md->constant_encoding()); 1700 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::flags_offset())); 1701 int header_bits = BitData::null_seen_byte_constant(); 1702 __ orb(data_addr, header_bits); 1703 __ jmp(*obj_is_null); 1704 __ bind(not_null); 1705 } else { 1706 __ jcc(Assembler::equal, *obj_is_null); 1707 } 1708 1709 if (!k->is_loaded()) { 1710 klass2reg_with_patching(k_RInfo, op->info_for_patch()); 1711 } else { 1712 #ifdef _LP64 1713 __ mov_metadata(k_RInfo, k->constant_encoding()); 1714 #endif // _LP64 1715 } 1716 __ verify_oop(obj); 1717 1718 if (op->fast_check()) { 1719 // get object class 1720 // not a safepoint as obj null check happens earlier 1721 #ifdef _LP64 1722 if (UseCompressedClassPointers) { 1723 __ load_klass(Rtmp1, obj); 1724 __ cmpptr(k_RInfo, Rtmp1); 1725 } else { 1726 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes())); 1727 } 1728 #else 1729 if (k->is_loaded()) { 1730 __ cmpklass(Address(obj, oopDesc::klass_offset_in_bytes()), k->constant_encoding()); 1731 } else { 1732 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes())); 1733 } 1734 #endif 1735 __ jcc(Assembler::notEqual, *failure_target); 1736 // successful cast, fall through to profile or jump 1737 } else { 1738 // get object class 1739 // not a safepoint as obj null check happens earlier 1740 __ load_klass(klass_RInfo, obj); 1741 if (k->is_loaded()) { 1742 // See if we get an immediate positive hit 1743 #ifdef _LP64 1744 __ cmpptr(k_RInfo, Address(klass_RInfo, k->super_check_offset())); 1745 #else 1746 __ cmpklass(Address(klass_RInfo, k->super_check_offset()), k->constant_encoding()); 1747 #endif // _LP64 1748 if ((juint)in_bytes(Klass::secondary_super_cache_offset()) != k->super_check_offset()) { 1749 __ jcc(Assembler::notEqual, *failure_target); 1750 // successful cast, fall through to profile or jump 1751 } else { 1752 // See if we get an immediate positive hit 1753 __ jcc(Assembler::equal, *success_target); 1754 // check for self 1755 #ifdef _LP64 1756 __ cmpptr(klass_RInfo, k_RInfo); 1757 #else 1758 __ cmpklass(klass_RInfo, k->constant_encoding()); 1759 #endif // _LP64 1760 __ jcc(Assembler::equal, *success_target); 1761 1762 __ push(klass_RInfo); 1763 #ifdef _LP64 1764 __ push(k_RInfo); 1765 #else 1766 __ pushklass(k->constant_encoding()); 1767 #endif // _LP64 1768 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 1769 __ pop(klass_RInfo); 1770 __ pop(klass_RInfo); 1771 // result is a boolean 1772 __ cmpl(klass_RInfo, 0); 1773 __ jcc(Assembler::equal, *failure_target); 1774 // successful cast, fall through to profile or jump 1775 } 1776 } else { 1777 // perform the fast part of the checking logic 1778 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL); 1779 // call out-of-line instance of __ check_klass_subtype_slow_path(...): 1780 __ push(klass_RInfo); 1781 __ push(k_RInfo); 1782 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 1783 __ pop(klass_RInfo); 1784 __ pop(k_RInfo); 1785 // result is a boolean 1786 __ cmpl(k_RInfo, 0); 1787 __ jcc(Assembler::equal, *failure_target); 1788 // successful cast, fall through to profile or jump 1789 } 1790 } 1791 if (op->should_profile()) { 1792 Register mdo = klass_RInfo, recv = k_RInfo; 1793 __ bind(profile_cast_success); 1794 __ mov_metadata(mdo, md->constant_encoding()); 1795 __ load_klass(recv, obj); 1796 type_profile_helper(mdo, md, data, recv, success); 1797 __ jmp(*success); 1798 1799 __ bind(profile_cast_failure); 1800 __ mov_metadata(mdo, md->constant_encoding()); 1801 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset())); 1802 __ subptr(counter_addr, DataLayout::counter_increment); 1803 __ jmp(*failure); 1804 } 1805 __ jmp(*success); 1806 } 1807 1808 1809 void LIR_Assembler::emit_opTypeCheck(LIR_OpTypeCheck* op) { 1810 LIR_Code code = op->code(); 1811 if (code == lir_store_check) { 1812 Register value = op->object()->as_register(); 1813 Register array = op->array()->as_register(); 1814 Register k_RInfo = op->tmp1()->as_register(); 1815 Register klass_RInfo = op->tmp2()->as_register(); 1816 Register Rtmp1 = op->tmp3()->as_register(); 1817 1818 CodeStub* stub = op->stub(); 1819 1820 // check if it needs to be profiled 1821 ciMethodData* md = NULL; 1822 ciProfileData* data = NULL; 1823 1824 if (op->should_profile()) { 1825 ciMethod* method = op->profiled_method(); 1826 assert(method != NULL, "Should have method"); 1827 int bci = op->profiled_bci(); 1828 md = method->method_data_or_null(); 1829 assert(md != NULL, "Sanity"); 1830 data = md->bci_to_data(bci); 1831 assert(data != NULL, "need data for type check"); 1832 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check"); 1833 } 1834 Label profile_cast_success, profile_cast_failure, done; 1835 Label *success_target = op->should_profile() ? &profile_cast_success : &done; 1836 Label *failure_target = op->should_profile() ? &profile_cast_failure : stub->entry(); 1837 1838 __ cmpptr(value, (int32_t)NULL_WORD); 1839 if (op->should_profile()) { 1840 Label not_null; 1841 __ jccb(Assembler::notEqual, not_null); 1842 // Object is null; update MDO and exit 1843 Register mdo = klass_RInfo; 1844 __ mov_metadata(mdo, md->constant_encoding()); 1845 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::flags_offset())); 1846 int header_bits = BitData::null_seen_byte_constant(); 1847 __ orb(data_addr, header_bits); 1848 __ jmp(done); 1849 __ bind(not_null); 1850 } else { 1851 __ jcc(Assembler::equal, done); 1852 } 1853 1854 add_debug_info_for_null_check_here(op->info_for_exception()); 1855 __ load_klass(k_RInfo, array); 1856 __ load_klass(klass_RInfo, value); 1857 1858 // get instance klass (it's already uncompressed) 1859 __ movptr(k_RInfo, Address(k_RInfo, ObjArrayKlass::element_klass_offset())); 1860 // perform the fast part of the checking logic 1861 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL); 1862 // call out-of-line instance of __ check_klass_subtype_slow_path(...): 1863 __ push(klass_RInfo); 1864 __ push(k_RInfo); 1865 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 1866 __ pop(klass_RInfo); 1867 __ pop(k_RInfo); 1868 // result is a boolean 1869 __ cmpl(k_RInfo, 0); 1870 __ jcc(Assembler::equal, *failure_target); 1871 // fall through to the success case 1872 1873 if (op->should_profile()) { 1874 Register mdo = klass_RInfo, recv = k_RInfo; 1875 __ bind(profile_cast_success); 1876 __ mov_metadata(mdo, md->constant_encoding()); 1877 __ load_klass(recv, value); 1878 type_profile_helper(mdo, md, data, recv, &done); 1879 __ jmpb(done); 1880 1881 __ bind(profile_cast_failure); 1882 __ mov_metadata(mdo, md->constant_encoding()); 1883 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset())); 1884 __ subptr(counter_addr, DataLayout::counter_increment); 1885 __ jmp(*stub->entry()); 1886 } 1887 1888 __ bind(done); 1889 } else 1890 if (code == lir_checkcast) { 1891 Register obj = op->object()->as_register(); 1892 Register dst = op->result_opr()->as_register(); 1893 Label success; 1894 emit_typecheck_helper(op, &success, op->stub()->entry(), &success); 1895 __ bind(success); 1896 if (dst != obj) { 1897 __ mov(dst, obj); 1898 } 1899 } else 1900 if (code == lir_instanceof) { 1901 Register obj = op->object()->as_register(); 1902 Register dst = op->result_opr()->as_register(); 1903 Label success, failure, done; 1904 emit_typecheck_helper(op, &success, &failure, &failure); 1905 __ bind(failure); 1906 __ xorptr(dst, dst); 1907 __ jmpb(done); 1908 __ bind(success); 1909 __ movptr(dst, 1); 1910 __ bind(done); 1911 } else { 1912 ShouldNotReachHere(); 1913 } 1914 1915 } 1916 1917 1918 void LIR_Assembler::emit_compare_and_swap(LIR_OpCompareAndSwap* op) { 1919 if (LP64_ONLY(false &&) op->code() == lir_cas_long && VM_Version::supports_cx8()) { 1920 assert(op->cmp_value()->as_register_lo() == rax, "wrong register"); 1921 assert(op->cmp_value()->as_register_hi() == rdx, "wrong register"); 1922 assert(op->new_value()->as_register_lo() == rbx, "wrong register"); 1923 assert(op->new_value()->as_register_hi() == rcx, "wrong register"); 1924 Register addr = op->addr()->as_register(); 1925 __ lock(); 1926 NOT_LP64(__ cmpxchg8(Address(addr, 0))); 1927 1928 } else if (op->code() == lir_cas_int || op->code() == lir_cas_obj ) { 1929 NOT_LP64(assert(op->addr()->is_single_cpu(), "must be single");) 1930 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo()); 1931 Register newval = op->new_value()->as_register(); 1932 Register cmpval = op->cmp_value()->as_register(); 1933 assert(cmpval == rax, "wrong register"); 1934 assert(newval != NULL, "new val must be register"); 1935 assert(cmpval != newval, "cmp and new values must be in different registers"); 1936 assert(cmpval != addr, "cmp and addr must be in different registers"); 1937 assert(newval != addr, "new value and addr must be in different registers"); 1938 1939 if ( op->code() == lir_cas_obj) { 1940 #ifdef _LP64 1941 if (UseCompressedOops) { 1942 __ encode_heap_oop(cmpval); 1943 __ mov(rscratch1, newval); 1944 __ encode_heap_oop(rscratch1); 1945 __ lock(); 1946 // cmpval (rax) is implicitly used by this instruction 1947 __ cmpxchgl(rscratch1, Address(addr, 0)); 1948 } else 1949 #endif 1950 { 1951 __ lock(); 1952 __ cmpxchgptr(newval, Address(addr, 0)); 1953 } 1954 } else { 1955 assert(op->code() == lir_cas_int, "lir_cas_int expected"); 1956 __ lock(); 1957 __ cmpxchgl(newval, Address(addr, 0)); 1958 } 1959 #ifdef _LP64 1960 } else if (op->code() == lir_cas_long) { 1961 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo()); 1962 Register newval = op->new_value()->as_register_lo(); 1963 Register cmpval = op->cmp_value()->as_register_lo(); 1964 assert(cmpval == rax, "wrong register"); 1965 assert(newval != NULL, "new val must be register"); 1966 assert(cmpval != newval, "cmp and new values must be in different registers"); 1967 assert(cmpval != addr, "cmp and addr must be in different registers"); 1968 assert(newval != addr, "new value and addr must be in different registers"); 1969 __ lock(); 1970 __ cmpxchgq(newval, Address(addr, 0)); 1971 #endif // _LP64 1972 } else { 1973 Unimplemented(); 1974 } 1975 } 1976 1977 void LIR_Assembler::cmove(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result, BasicType type) { 1978 Assembler::Condition acond, ncond; 1979 switch (condition) { 1980 case lir_cond_equal: acond = Assembler::equal; ncond = Assembler::notEqual; break; 1981 case lir_cond_notEqual: acond = Assembler::notEqual; ncond = Assembler::equal; break; 1982 case lir_cond_less: acond = Assembler::less; ncond = Assembler::greaterEqual; break; 1983 case lir_cond_lessEqual: acond = Assembler::lessEqual; ncond = Assembler::greater; break; 1984 case lir_cond_greaterEqual: acond = Assembler::greaterEqual; ncond = Assembler::less; break; 1985 case lir_cond_greater: acond = Assembler::greater; ncond = Assembler::lessEqual; break; 1986 case lir_cond_belowEqual: acond = Assembler::belowEqual; ncond = Assembler::above; break; 1987 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; ncond = Assembler::below; break; 1988 default: acond = Assembler::equal; ncond = Assembler::notEqual; 1989 ShouldNotReachHere(); 1990 } 1991 1992 if (opr1->is_cpu_register()) { 1993 reg2reg(opr1, result); 1994 } else if (opr1->is_stack()) { 1995 stack2reg(opr1, result, result->type()); 1996 } else if (opr1->is_constant()) { 1997 const2reg(opr1, result, lir_patch_none, NULL); 1998 } else { 1999 ShouldNotReachHere(); 2000 } 2001 2002 if (VM_Version::supports_cmov() && !opr2->is_constant()) { 2003 // optimized version that does not require a branch 2004 if (opr2->is_single_cpu()) { 2005 assert(opr2->cpu_regnr() != result->cpu_regnr(), "opr2 already overwritten by previous move"); 2006 __ cmov(ncond, result->as_register(), opr2->as_register()); 2007 } else if (opr2->is_double_cpu()) { 2008 assert(opr2->cpu_regnrLo() != result->cpu_regnrLo() && opr2->cpu_regnrLo() != result->cpu_regnrHi(), "opr2 already overwritten by previous move"); 2009 assert(opr2->cpu_regnrHi() != result->cpu_regnrLo() && opr2->cpu_regnrHi() != result->cpu_regnrHi(), "opr2 already overwritten by previous move"); 2010 __ cmovptr(ncond, result->as_register_lo(), opr2->as_register_lo()); 2011 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), opr2->as_register_hi());) 2012 } else if (opr2->is_single_stack()) { 2013 __ cmovl(ncond, result->as_register(), frame_map()->address_for_slot(opr2->single_stack_ix())); 2014 } else if (opr2->is_double_stack()) { 2015 __ cmovptr(ncond, result->as_register_lo(), frame_map()->address_for_slot(opr2->double_stack_ix(), lo_word_offset_in_bytes)); 2016 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), frame_map()->address_for_slot(opr2->double_stack_ix(), hi_word_offset_in_bytes));) 2017 } else { 2018 ShouldNotReachHere(); 2019 } 2020 2021 } else { 2022 Label skip; 2023 __ jcc (acond, skip); 2024 if (opr2->is_cpu_register()) { 2025 reg2reg(opr2, result); 2026 } else if (opr2->is_stack()) { 2027 stack2reg(opr2, result, result->type()); 2028 } else if (opr2->is_constant()) { 2029 const2reg(opr2, result, lir_patch_none, NULL); 2030 } else { 2031 ShouldNotReachHere(); 2032 } 2033 __ bind(skip); 2034 } 2035 } 2036 2037 2038 void LIR_Assembler::arith_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dest, CodeEmitInfo* info, bool pop_fpu_stack) { 2039 assert(info == NULL, "should never be used, idiv/irem and ldiv/lrem not handled by this method"); 2040 2041 if (left->is_single_cpu()) { 2042 assert(left == dest, "left and dest must be equal"); 2043 Register lreg = left->as_register(); 2044 2045 if (right->is_single_cpu()) { 2046 // cpu register - cpu register 2047 Register rreg = right->as_register(); 2048 switch (code) { 2049 case lir_add: __ addl (lreg, rreg); break; 2050 case lir_sub: __ subl (lreg, rreg); break; 2051 case lir_mul: __ imull(lreg, rreg); break; 2052 default: ShouldNotReachHere(); 2053 } 2054 2055 } else if (right->is_stack()) { 2056 // cpu register - stack 2057 Address raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2058 switch (code) { 2059 case lir_add: __ addl(lreg, raddr); break; 2060 case lir_sub: __ subl(lreg, raddr); break; 2061 default: ShouldNotReachHere(); 2062 } 2063 2064 } else if (right->is_constant()) { 2065 // cpu register - constant 2066 jint c = right->as_constant_ptr()->as_jint(); 2067 switch (code) { 2068 case lir_add: { 2069 __ incrementl(lreg, c); 2070 break; 2071 } 2072 case lir_sub: { 2073 __ decrementl(lreg, c); 2074 break; 2075 } 2076 default: ShouldNotReachHere(); 2077 } 2078 2079 } else { 2080 ShouldNotReachHere(); 2081 } 2082 2083 } else if (left->is_double_cpu()) { 2084 assert(left == dest, "left and dest must be equal"); 2085 Register lreg_lo = left->as_register_lo(); 2086 Register lreg_hi = left->as_register_hi(); 2087 2088 if (right->is_double_cpu()) { 2089 // cpu register - cpu register 2090 Register rreg_lo = right->as_register_lo(); 2091 Register rreg_hi = right->as_register_hi(); 2092 NOT_LP64(assert_different_registers(lreg_lo, lreg_hi, rreg_lo, rreg_hi)); 2093 LP64_ONLY(assert_different_registers(lreg_lo, rreg_lo)); 2094 switch (code) { 2095 case lir_add: 2096 __ addptr(lreg_lo, rreg_lo); 2097 NOT_LP64(__ adcl(lreg_hi, rreg_hi)); 2098 break; 2099 case lir_sub: 2100 __ subptr(lreg_lo, rreg_lo); 2101 NOT_LP64(__ sbbl(lreg_hi, rreg_hi)); 2102 break; 2103 case lir_mul: 2104 #ifdef _LP64 2105 __ imulq(lreg_lo, rreg_lo); 2106 #else 2107 assert(lreg_lo == rax && lreg_hi == rdx, "must be"); 2108 __ imull(lreg_hi, rreg_lo); 2109 __ imull(rreg_hi, lreg_lo); 2110 __ addl (rreg_hi, lreg_hi); 2111 __ mull (rreg_lo); 2112 __ addl (lreg_hi, rreg_hi); 2113 #endif // _LP64 2114 break; 2115 default: 2116 ShouldNotReachHere(); 2117 } 2118 2119 } else if (right->is_constant()) { 2120 // cpu register - constant 2121 #ifdef _LP64 2122 jlong c = right->as_constant_ptr()->as_jlong_bits(); 2123 __ movptr(r10, (intptr_t) c); 2124 switch (code) { 2125 case lir_add: 2126 __ addptr(lreg_lo, r10); 2127 break; 2128 case lir_sub: 2129 __ subptr(lreg_lo, r10); 2130 break; 2131 default: 2132 ShouldNotReachHere(); 2133 } 2134 #else 2135 jint c_lo = right->as_constant_ptr()->as_jint_lo(); 2136 jint c_hi = right->as_constant_ptr()->as_jint_hi(); 2137 switch (code) { 2138 case lir_add: 2139 __ addptr(lreg_lo, c_lo); 2140 __ adcl(lreg_hi, c_hi); 2141 break; 2142 case lir_sub: 2143 __ subptr(lreg_lo, c_lo); 2144 __ sbbl(lreg_hi, c_hi); 2145 break; 2146 default: 2147 ShouldNotReachHere(); 2148 } 2149 #endif // _LP64 2150 2151 } else { 2152 ShouldNotReachHere(); 2153 } 2154 2155 } else if (left->is_single_xmm()) { 2156 assert(left == dest, "left and dest must be equal"); 2157 XMMRegister lreg = left->as_xmm_float_reg(); 2158 2159 if (right->is_single_xmm()) { 2160 XMMRegister rreg = right->as_xmm_float_reg(); 2161 switch (code) { 2162 case lir_add: __ addss(lreg, rreg); break; 2163 case lir_sub: __ subss(lreg, rreg); break; 2164 case lir_mul_strictfp: // fall through 2165 case lir_mul: __ mulss(lreg, rreg); break; 2166 case lir_div_strictfp: // fall through 2167 case lir_div: __ divss(lreg, rreg); break; 2168 default: ShouldNotReachHere(); 2169 } 2170 } else { 2171 Address raddr; 2172 if (right->is_single_stack()) { 2173 raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2174 } else if (right->is_constant()) { 2175 // hack for now 2176 raddr = __ as_Address(InternalAddress(float_constant(right->as_jfloat()))); 2177 } else { 2178 ShouldNotReachHere(); 2179 } 2180 switch (code) { 2181 case lir_add: __ addss(lreg, raddr); break; 2182 case lir_sub: __ subss(lreg, raddr); break; 2183 case lir_mul_strictfp: // fall through 2184 case lir_mul: __ mulss(lreg, raddr); break; 2185 case lir_div_strictfp: // fall through 2186 case lir_div: __ divss(lreg, raddr); break; 2187 default: ShouldNotReachHere(); 2188 } 2189 } 2190 2191 } else if (left->is_double_xmm()) { 2192 assert(left == dest, "left and dest must be equal"); 2193 2194 XMMRegister lreg = left->as_xmm_double_reg(); 2195 if (right->is_double_xmm()) { 2196 XMMRegister rreg = right->as_xmm_double_reg(); 2197 switch (code) { 2198 case lir_add: __ addsd(lreg, rreg); break; 2199 case lir_sub: __ subsd(lreg, rreg); break; 2200 case lir_mul_strictfp: // fall through 2201 case lir_mul: __ mulsd(lreg, rreg); break; 2202 case lir_div_strictfp: // fall through 2203 case lir_div: __ divsd(lreg, rreg); break; 2204 default: ShouldNotReachHere(); 2205 } 2206 } else { 2207 Address raddr; 2208 if (right->is_double_stack()) { 2209 raddr = frame_map()->address_for_slot(right->double_stack_ix()); 2210 } else if (right->is_constant()) { 2211 // hack for now 2212 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble()))); 2213 } else { 2214 ShouldNotReachHere(); 2215 } 2216 switch (code) { 2217 case lir_add: __ addsd(lreg, raddr); break; 2218 case lir_sub: __ subsd(lreg, raddr); break; 2219 case lir_mul_strictfp: // fall through 2220 case lir_mul: __ mulsd(lreg, raddr); break; 2221 case lir_div_strictfp: // fall through 2222 case lir_div: __ divsd(lreg, raddr); break; 2223 default: ShouldNotReachHere(); 2224 } 2225 } 2226 2227 } else if (left->is_single_fpu()) { 2228 assert(dest->is_single_fpu(), "fpu stack allocation required"); 2229 2230 if (right->is_single_fpu()) { 2231 arith_fpu_implementation(code, left->fpu_regnr(), right->fpu_regnr(), dest->fpu_regnr(), pop_fpu_stack); 2232 2233 } else { 2234 assert(left->fpu_regnr() == 0, "left must be on TOS"); 2235 assert(dest->fpu_regnr() == 0, "dest must be on TOS"); 2236 2237 Address raddr; 2238 if (right->is_single_stack()) { 2239 raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2240 } else if (right->is_constant()) { 2241 address const_addr = float_constant(right->as_jfloat()); 2242 assert(const_addr != NULL, "incorrect float/double constant maintainance"); 2243 // hack for now 2244 raddr = __ as_Address(InternalAddress(const_addr)); 2245 } else { 2246 ShouldNotReachHere(); 2247 } 2248 2249 switch (code) { 2250 case lir_add: __ fadd_s(raddr); break; 2251 case lir_sub: __ fsub_s(raddr); break; 2252 case lir_mul_strictfp: // fall through 2253 case lir_mul: __ fmul_s(raddr); break; 2254 case lir_div_strictfp: // fall through 2255 case lir_div: __ fdiv_s(raddr); break; 2256 default: ShouldNotReachHere(); 2257 } 2258 } 2259 2260 } else if (left->is_double_fpu()) { 2261 assert(dest->is_double_fpu(), "fpu stack allocation required"); 2262 2263 if (code == lir_mul_strictfp || code == lir_div_strictfp) { 2264 // Double values require special handling for strictfp mul/div on x86 2265 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1())); 2266 __ fmulp(left->fpu_regnrLo() + 1); 2267 } 2268 2269 if (right->is_double_fpu()) { 2270 arith_fpu_implementation(code, left->fpu_regnrLo(), right->fpu_regnrLo(), dest->fpu_regnrLo(), pop_fpu_stack); 2271 2272 } else { 2273 assert(left->fpu_regnrLo() == 0, "left must be on TOS"); 2274 assert(dest->fpu_regnrLo() == 0, "dest must be on TOS"); 2275 2276 Address raddr; 2277 if (right->is_double_stack()) { 2278 raddr = frame_map()->address_for_slot(right->double_stack_ix()); 2279 } else if (right->is_constant()) { 2280 // hack for now 2281 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble()))); 2282 } else { 2283 ShouldNotReachHere(); 2284 } 2285 2286 switch (code) { 2287 case lir_add: __ fadd_d(raddr); break; 2288 case lir_sub: __ fsub_d(raddr); break; 2289 case lir_mul_strictfp: // fall through 2290 case lir_mul: __ fmul_d(raddr); break; 2291 case lir_div_strictfp: // fall through 2292 case lir_div: __ fdiv_d(raddr); break; 2293 default: ShouldNotReachHere(); 2294 } 2295 } 2296 2297 if (code == lir_mul_strictfp || code == lir_div_strictfp) { 2298 // Double values require special handling for strictfp mul/div on x86 2299 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2())); 2300 __ fmulp(dest->fpu_regnrLo() + 1); 2301 } 2302 2303 } else if (left->is_single_stack() || left->is_address()) { 2304 assert(left == dest, "left and dest must be equal"); 2305 2306 Address laddr; 2307 if (left->is_single_stack()) { 2308 laddr = frame_map()->address_for_slot(left->single_stack_ix()); 2309 } else if (left->is_address()) { 2310 laddr = as_Address(left->as_address_ptr()); 2311 } else { 2312 ShouldNotReachHere(); 2313 } 2314 2315 if (right->is_single_cpu()) { 2316 Register rreg = right->as_register(); 2317 switch (code) { 2318 case lir_add: __ addl(laddr, rreg); break; 2319 case lir_sub: __ subl(laddr, rreg); break; 2320 default: ShouldNotReachHere(); 2321 } 2322 } else if (right->is_constant()) { 2323 jint c = right->as_constant_ptr()->as_jint(); 2324 switch (code) { 2325 case lir_add: { 2326 __ incrementl(laddr, c); 2327 break; 2328 } 2329 case lir_sub: { 2330 __ decrementl(laddr, c); 2331 break; 2332 } 2333 default: ShouldNotReachHere(); 2334 } 2335 } else { 2336 ShouldNotReachHere(); 2337 } 2338 2339 } else { 2340 ShouldNotReachHere(); 2341 } 2342 } 2343 2344 void LIR_Assembler::arith_fpu_implementation(LIR_Code code, int left_index, int right_index, int dest_index, bool pop_fpu_stack) { 2345 assert(pop_fpu_stack || (left_index == dest_index || right_index == dest_index), "invalid LIR"); 2346 assert(!pop_fpu_stack || (left_index - 1 == dest_index || right_index - 1 == dest_index), "invalid LIR"); 2347 assert(left_index == 0 || right_index == 0, "either must be on top of stack"); 2348 2349 bool left_is_tos = (left_index == 0); 2350 bool dest_is_tos = (dest_index == 0); 2351 int non_tos_index = (left_is_tos ? right_index : left_index); 2352 2353 switch (code) { 2354 case lir_add: 2355 if (pop_fpu_stack) __ faddp(non_tos_index); 2356 else if (dest_is_tos) __ fadd (non_tos_index); 2357 else __ fadda(non_tos_index); 2358 break; 2359 2360 case lir_sub: 2361 if (left_is_tos) { 2362 if (pop_fpu_stack) __ fsubrp(non_tos_index); 2363 else if (dest_is_tos) __ fsub (non_tos_index); 2364 else __ fsubra(non_tos_index); 2365 } else { 2366 if (pop_fpu_stack) __ fsubp (non_tos_index); 2367 else if (dest_is_tos) __ fsubr (non_tos_index); 2368 else __ fsuba (non_tos_index); 2369 } 2370 break; 2371 2372 case lir_mul_strictfp: // fall through 2373 case lir_mul: 2374 if (pop_fpu_stack) __ fmulp(non_tos_index); 2375 else if (dest_is_tos) __ fmul (non_tos_index); 2376 else __ fmula(non_tos_index); 2377 break; 2378 2379 case lir_div_strictfp: // fall through 2380 case lir_div: 2381 if (left_is_tos) { 2382 if (pop_fpu_stack) __ fdivrp(non_tos_index); 2383 else if (dest_is_tos) __ fdiv (non_tos_index); 2384 else __ fdivra(non_tos_index); 2385 } else { 2386 if (pop_fpu_stack) __ fdivp (non_tos_index); 2387 else if (dest_is_tos) __ fdivr (non_tos_index); 2388 else __ fdiva (non_tos_index); 2389 } 2390 break; 2391 2392 case lir_rem: 2393 assert(left_is_tos && dest_is_tos && right_index == 1, "must be guaranteed by FPU stack allocation"); 2394 __ fremr(noreg); 2395 break; 2396 2397 default: 2398 ShouldNotReachHere(); 2399 } 2400 } 2401 2402 2403 void LIR_Assembler::intrinsic_op(LIR_Code code, LIR_Opr value, LIR_Opr tmp, LIR_Opr dest, LIR_Op* op) { 2404 if (value->is_double_xmm()) { 2405 switch(code) { 2406 case lir_abs : 2407 { 2408 #ifdef _LP64 2409 if (UseAVX > 2 && !VM_Version::supports_avx512vl()) { 2410 assert(tmp->is_valid(), "need temporary"); 2411 __ vpandn(dest->as_xmm_double_reg(), tmp->as_xmm_double_reg(), value->as_xmm_double_reg(), 2); 2412 } else 2413 #endif 2414 { 2415 if (dest->as_xmm_double_reg() != value->as_xmm_double_reg()) { 2416 __ movdbl(dest->as_xmm_double_reg(), value->as_xmm_double_reg()); 2417 } 2418 assert(!tmp->is_valid(), "do not need temporary"); 2419 __ andpd(dest->as_xmm_double_reg(), 2420 ExternalAddress((address)double_signmask_pool)); 2421 } 2422 } 2423 break; 2424 2425 case lir_sqrt: __ sqrtsd(dest->as_xmm_double_reg(), value->as_xmm_double_reg()); break; 2426 // all other intrinsics are not available in the SSE instruction set, so FPU is used 2427 default : ShouldNotReachHere(); 2428 } 2429 2430 } else if (value->is_double_fpu()) { 2431 assert(value->fpu_regnrLo() == 0 && dest->fpu_regnrLo() == 0, "both must be on TOS"); 2432 switch(code) { 2433 case lir_abs : __ fabs() ; break; 2434 case lir_sqrt : __ fsqrt(); break; 2435 default : ShouldNotReachHere(); 2436 } 2437 } else { 2438 Unimplemented(); 2439 } 2440 } 2441 2442 void LIR_Assembler::logic_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst) { 2443 // assert(left->destroys_register(), "check"); 2444 if (left->is_single_cpu()) { 2445 Register reg = left->as_register(); 2446 if (right->is_constant()) { 2447 int val = right->as_constant_ptr()->as_jint(); 2448 switch (code) { 2449 case lir_logic_and: __ andl (reg, val); break; 2450 case lir_logic_or: __ orl (reg, val); break; 2451 case lir_logic_xor: __ xorl (reg, val); break; 2452 default: ShouldNotReachHere(); 2453 } 2454 } else if (right->is_stack()) { 2455 // added support for stack operands 2456 Address raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2457 switch (code) { 2458 case lir_logic_and: __ andl (reg, raddr); break; 2459 case lir_logic_or: __ orl (reg, raddr); break; 2460 case lir_logic_xor: __ xorl (reg, raddr); break; 2461 default: ShouldNotReachHere(); 2462 } 2463 } else { 2464 Register rright = right->as_register(); 2465 switch (code) { 2466 case lir_logic_and: __ andptr (reg, rright); break; 2467 case lir_logic_or : __ orptr (reg, rright); break; 2468 case lir_logic_xor: __ xorptr (reg, rright); break; 2469 default: ShouldNotReachHere(); 2470 } 2471 } 2472 move_regs(reg, dst->as_register()); 2473 } else { 2474 Register l_lo = left->as_register_lo(); 2475 Register l_hi = left->as_register_hi(); 2476 if (right->is_constant()) { 2477 #ifdef _LP64 2478 __ mov64(rscratch1, right->as_constant_ptr()->as_jlong()); 2479 switch (code) { 2480 case lir_logic_and: 2481 __ andq(l_lo, rscratch1); 2482 break; 2483 case lir_logic_or: 2484 __ orq(l_lo, rscratch1); 2485 break; 2486 case lir_logic_xor: 2487 __ xorq(l_lo, rscratch1); 2488 break; 2489 default: ShouldNotReachHere(); 2490 } 2491 #else 2492 int r_lo = right->as_constant_ptr()->as_jint_lo(); 2493 int r_hi = right->as_constant_ptr()->as_jint_hi(); 2494 switch (code) { 2495 case lir_logic_and: 2496 __ andl(l_lo, r_lo); 2497 __ andl(l_hi, r_hi); 2498 break; 2499 case lir_logic_or: 2500 __ orl(l_lo, r_lo); 2501 __ orl(l_hi, r_hi); 2502 break; 2503 case lir_logic_xor: 2504 __ xorl(l_lo, r_lo); 2505 __ xorl(l_hi, r_hi); 2506 break; 2507 default: ShouldNotReachHere(); 2508 } 2509 #endif // _LP64 2510 } else { 2511 #ifdef _LP64 2512 Register r_lo; 2513 if (right->type() == T_OBJECT || right->type() == T_ARRAY) { 2514 r_lo = right->as_register(); 2515 } else { 2516 r_lo = right->as_register_lo(); 2517 } 2518 #else 2519 Register r_lo = right->as_register_lo(); 2520 Register r_hi = right->as_register_hi(); 2521 assert(l_lo != r_hi, "overwriting registers"); 2522 #endif 2523 switch (code) { 2524 case lir_logic_and: 2525 __ andptr(l_lo, r_lo); 2526 NOT_LP64(__ andptr(l_hi, r_hi);) 2527 break; 2528 case lir_logic_or: 2529 __ orptr(l_lo, r_lo); 2530 NOT_LP64(__ orptr(l_hi, r_hi);) 2531 break; 2532 case lir_logic_xor: 2533 __ xorptr(l_lo, r_lo); 2534 NOT_LP64(__ xorptr(l_hi, r_hi);) 2535 break; 2536 default: ShouldNotReachHere(); 2537 } 2538 } 2539 2540 Register dst_lo = dst->as_register_lo(); 2541 Register dst_hi = dst->as_register_hi(); 2542 2543 #ifdef _LP64 2544 move_regs(l_lo, dst_lo); 2545 #else 2546 if (dst_lo == l_hi) { 2547 assert(dst_hi != l_lo, "overwriting registers"); 2548 move_regs(l_hi, dst_hi); 2549 move_regs(l_lo, dst_lo); 2550 } else { 2551 assert(dst_lo != l_hi, "overwriting registers"); 2552 move_regs(l_lo, dst_lo); 2553 move_regs(l_hi, dst_hi); 2554 } 2555 #endif // _LP64 2556 } 2557 } 2558 2559 2560 // we assume that rax, and rdx can be overwritten 2561 void LIR_Assembler::arithmetic_idiv(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr temp, LIR_Opr result, CodeEmitInfo* info) { 2562 2563 assert(left->is_single_cpu(), "left must be register"); 2564 assert(right->is_single_cpu() || right->is_constant(), "right must be register or constant"); 2565 assert(result->is_single_cpu(), "result must be register"); 2566 2567 // assert(left->destroys_register(), "check"); 2568 // assert(right->destroys_register(), "check"); 2569 2570 Register lreg = left->as_register(); 2571 Register dreg = result->as_register(); 2572 2573 if (right->is_constant()) { 2574 jint divisor = right->as_constant_ptr()->as_jint(); 2575 assert(divisor > 0 && is_power_of_2(divisor), "must be"); 2576 if (code == lir_idiv) { 2577 assert(lreg == rax, "must be rax,"); 2578 assert(temp->as_register() == rdx, "tmp register must be rdx"); 2579 __ cdql(); // sign extend into rdx:rax 2580 if (divisor == 2) { 2581 __ subl(lreg, rdx); 2582 } else { 2583 __ andl(rdx, divisor - 1); 2584 __ addl(lreg, rdx); 2585 } 2586 __ sarl(lreg, log2_jint(divisor)); 2587 move_regs(lreg, dreg); 2588 } else if (code == lir_irem) { 2589 Label done; 2590 __ mov(dreg, lreg); 2591 __ andl(dreg, 0x80000000 | (divisor - 1)); 2592 __ jcc(Assembler::positive, done); 2593 __ decrement(dreg); 2594 __ orl(dreg, ~(divisor - 1)); 2595 __ increment(dreg); 2596 __ bind(done); 2597 } else { 2598 ShouldNotReachHere(); 2599 } 2600 } else { 2601 Register rreg = right->as_register(); 2602 assert(lreg == rax, "left register must be rax,"); 2603 assert(rreg != rdx, "right register must not be rdx"); 2604 assert(temp->as_register() == rdx, "tmp register must be rdx"); 2605 2606 move_regs(lreg, rax); 2607 2608 int idivl_offset = __ corrected_idivl(rreg); 2609 if (ImplicitDiv0Checks) { 2610 add_debug_info_for_div0(idivl_offset, info); 2611 } 2612 if (code == lir_irem) { 2613 move_regs(rdx, dreg); // result is in rdx 2614 } else { 2615 move_regs(rax, dreg); 2616 } 2617 } 2618 } 2619 2620 2621 void LIR_Assembler::comp_op(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Op2* op) { 2622 if (opr1->is_single_cpu()) { 2623 Register reg1 = opr1->as_register(); 2624 if (opr2->is_single_cpu()) { 2625 // cpu register - cpu register 2626 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) { 2627 __ cmpoop(reg1, opr2->as_register()); 2628 } else { 2629 assert(opr2->type() != T_OBJECT && opr2->type() != T_ARRAY, "cmp int, oop?"); 2630 __ cmpl(reg1, opr2->as_register()); 2631 } 2632 } else if (opr2->is_stack()) { 2633 // cpu register - stack 2634 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) { 2635 __ cmpoop(reg1, frame_map()->address_for_slot(opr2->single_stack_ix())); 2636 } else { 2637 __ cmpl(reg1, frame_map()->address_for_slot(opr2->single_stack_ix())); 2638 } 2639 } else if (opr2->is_constant()) { 2640 // cpu register - constant 2641 LIR_Const* c = opr2->as_constant_ptr(); 2642 if (c->type() == T_INT) { 2643 __ cmpl(reg1, c->as_jint()); 2644 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) { 2645 // In 64bit oops are single register 2646 jobject o = c->as_jobject(); 2647 if (o == NULL) { 2648 __ cmpptr(reg1, (int32_t)NULL_WORD); 2649 } else { 2650 __ cmpoop(reg1, o); 2651 } 2652 } else { 2653 fatal("unexpected type: %s", basictype_to_str(c->type())); 2654 } 2655 // cpu register - address 2656 } else if (opr2->is_address()) { 2657 if (op->info() != NULL) { 2658 add_debug_info_for_null_check_here(op->info()); 2659 } 2660 __ cmpl(reg1, as_Address(opr2->as_address_ptr())); 2661 } else { 2662 ShouldNotReachHere(); 2663 } 2664 2665 } else if(opr1->is_double_cpu()) { 2666 Register xlo = opr1->as_register_lo(); 2667 Register xhi = opr1->as_register_hi(); 2668 if (opr2->is_double_cpu()) { 2669 #ifdef _LP64 2670 __ cmpptr(xlo, opr2->as_register_lo()); 2671 #else 2672 // cpu register - cpu register 2673 Register ylo = opr2->as_register_lo(); 2674 Register yhi = opr2->as_register_hi(); 2675 __ subl(xlo, ylo); 2676 __ sbbl(xhi, yhi); 2677 if (condition == lir_cond_equal || condition == lir_cond_notEqual) { 2678 __ orl(xhi, xlo); 2679 } 2680 #endif // _LP64 2681 } else if (opr2->is_constant()) { 2682 // cpu register - constant 0 2683 assert(opr2->as_jlong() == (jlong)0, "only handles zero"); 2684 #ifdef _LP64 2685 __ cmpptr(xlo, (int32_t)opr2->as_jlong()); 2686 #else 2687 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "only handles equals case"); 2688 __ orl(xhi, xlo); 2689 #endif // _LP64 2690 } else { 2691 ShouldNotReachHere(); 2692 } 2693 2694 } else if (opr1->is_single_xmm()) { 2695 XMMRegister reg1 = opr1->as_xmm_float_reg(); 2696 if (opr2->is_single_xmm()) { 2697 // xmm register - xmm register 2698 __ ucomiss(reg1, opr2->as_xmm_float_reg()); 2699 } else if (opr2->is_stack()) { 2700 // xmm register - stack 2701 __ ucomiss(reg1, frame_map()->address_for_slot(opr2->single_stack_ix())); 2702 } else if (opr2->is_constant()) { 2703 // xmm register - constant 2704 __ ucomiss(reg1, InternalAddress(float_constant(opr2->as_jfloat()))); 2705 } else if (opr2->is_address()) { 2706 // xmm register - address 2707 if (op->info() != NULL) { 2708 add_debug_info_for_null_check_here(op->info()); 2709 } 2710 __ ucomiss(reg1, as_Address(opr2->as_address_ptr())); 2711 } else { 2712 ShouldNotReachHere(); 2713 } 2714 2715 } else if (opr1->is_double_xmm()) { 2716 XMMRegister reg1 = opr1->as_xmm_double_reg(); 2717 if (opr2->is_double_xmm()) { 2718 // xmm register - xmm register 2719 __ ucomisd(reg1, opr2->as_xmm_double_reg()); 2720 } else if (opr2->is_stack()) { 2721 // xmm register - stack 2722 __ ucomisd(reg1, frame_map()->address_for_slot(opr2->double_stack_ix())); 2723 } else if (opr2->is_constant()) { 2724 // xmm register - constant 2725 __ ucomisd(reg1, InternalAddress(double_constant(opr2->as_jdouble()))); 2726 } else if (opr2->is_address()) { 2727 // xmm register - address 2728 if (op->info() != NULL) { 2729 add_debug_info_for_null_check_here(op->info()); 2730 } 2731 __ ucomisd(reg1, as_Address(opr2->pointer()->as_address())); 2732 } else { 2733 ShouldNotReachHere(); 2734 } 2735 2736 } else if(opr1->is_single_fpu() || opr1->is_double_fpu()) { 2737 assert(opr1->is_fpu_register() && opr1->fpu() == 0, "currently left-hand side must be on TOS (relax this restriction)"); 2738 assert(opr2->is_fpu_register(), "both must be registers"); 2739 __ fcmp(noreg, opr2->fpu(), op->fpu_pop_count() > 0, op->fpu_pop_count() > 1); 2740 2741 } else if (opr1->is_address() && opr2->is_constant()) { 2742 LIR_Const* c = opr2->as_constant_ptr(); 2743 #ifdef _LP64 2744 if (c->type() == T_OBJECT || c->type() == T_ARRAY) { 2745 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "need to reverse"); 2746 __ movoop(rscratch1, c->as_jobject()); 2747 } 2748 #endif // LP64 2749 if (op->info() != NULL) { 2750 add_debug_info_for_null_check_here(op->info()); 2751 } 2752 // special case: address - constant 2753 LIR_Address* addr = opr1->as_address_ptr(); 2754 if (c->type() == T_INT) { 2755 __ cmpl(as_Address(addr), c->as_jint()); 2756 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) { 2757 #ifdef _LP64 2758 // %%% Make this explode if addr isn't reachable until we figure out a 2759 // better strategy by giving noreg as the temp for as_Address 2760 __ cmpoop(rscratch1, as_Address(addr, noreg)); 2761 #else 2762 __ cmpoop(as_Address(addr), c->as_jobject()); 2763 #endif // _LP64 2764 } else { 2765 ShouldNotReachHere(); 2766 } 2767 2768 } else { 2769 ShouldNotReachHere(); 2770 } 2771 } 2772 2773 void LIR_Assembler::comp_fl2i(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst, LIR_Op2* op) { 2774 if (code == lir_cmp_fd2i || code == lir_ucmp_fd2i) { 2775 if (left->is_single_xmm()) { 2776 assert(right->is_single_xmm(), "must match"); 2777 __ cmpss2int(left->as_xmm_float_reg(), right->as_xmm_float_reg(), dst->as_register(), code == lir_ucmp_fd2i); 2778 } else if (left->is_double_xmm()) { 2779 assert(right->is_double_xmm(), "must match"); 2780 __ cmpsd2int(left->as_xmm_double_reg(), right->as_xmm_double_reg(), dst->as_register(), code == lir_ucmp_fd2i); 2781 2782 } else { 2783 assert(left->is_single_fpu() || left->is_double_fpu(), "must be"); 2784 assert(right->is_single_fpu() || right->is_double_fpu(), "must match"); 2785 2786 assert(left->fpu() == 0, "left must be on TOS"); 2787 __ fcmp2int(dst->as_register(), code == lir_ucmp_fd2i, right->fpu(), 2788 op->fpu_pop_count() > 0, op->fpu_pop_count() > 1); 2789 } 2790 } else { 2791 assert(code == lir_cmp_l2i, "check"); 2792 #ifdef _LP64 2793 Label done; 2794 Register dest = dst->as_register(); 2795 __ cmpptr(left->as_register_lo(), right->as_register_lo()); 2796 __ movl(dest, -1); 2797 __ jccb(Assembler::less, done); 2798 __ set_byte_if_not_zero(dest); 2799 __ movzbl(dest, dest); 2800 __ bind(done); 2801 #else 2802 __ lcmp2int(left->as_register_hi(), 2803 left->as_register_lo(), 2804 right->as_register_hi(), 2805 right->as_register_lo()); 2806 move_regs(left->as_register_hi(), dst->as_register()); 2807 #endif // _LP64 2808 } 2809 } 2810 2811 2812 void LIR_Assembler::align_call(LIR_Code code) { 2813 // make sure that the displacement word of the call ends up word aligned 2814 int offset = __ offset(); 2815 switch (code) { 2816 case lir_static_call: 2817 case lir_optvirtual_call: 2818 case lir_dynamic_call: 2819 offset += NativeCall::displacement_offset; 2820 break; 2821 case lir_icvirtual_call: 2822 offset += NativeCall::displacement_offset + NativeMovConstReg::instruction_size; 2823 break; 2824 case lir_virtual_call: // currently, sparc-specific for niagara 2825 default: ShouldNotReachHere(); 2826 } 2827 __ align(BytesPerWord, offset); 2828 } 2829 2830 2831 void LIR_Assembler::call(LIR_OpJavaCall* op, relocInfo::relocType rtype) { 2832 assert((__ offset() + NativeCall::displacement_offset) % BytesPerWord == 0, 2833 "must be aligned"); 2834 __ call(AddressLiteral(op->addr(), rtype)); 2835 add_call_info(code_offset(), op->info()); 2836 } 2837 2838 2839 void LIR_Assembler::ic_call(LIR_OpJavaCall* op) { 2840 __ ic_call(op->addr()); 2841 add_call_info(code_offset(), op->info()); 2842 assert((__ offset() - NativeCall::instruction_size + NativeCall::displacement_offset) % BytesPerWord == 0, 2843 "must be aligned"); 2844 } 2845 2846 2847 /* Currently, vtable-dispatch is only enabled for sparc platforms */ 2848 void LIR_Assembler::vtable_call(LIR_OpJavaCall* op) { 2849 ShouldNotReachHere(); 2850 } 2851 2852 2853 void LIR_Assembler::emit_static_call_stub() { 2854 address call_pc = __ pc(); 2855 address stub = __ start_a_stub(call_stub_size()); 2856 if (stub == NULL) { 2857 bailout("static call stub overflow"); 2858 return; 2859 } 2860 2861 int start = __ offset(); 2862 2863 // make sure that the displacement word of the call ends up word aligned 2864 __ align(BytesPerWord, __ offset() + NativeMovConstReg::instruction_size + NativeCall::displacement_offset); 2865 __ relocate(static_stub_Relocation::spec(call_pc, false /* is_aot */)); 2866 __ mov_metadata(rbx, (Metadata*)NULL); 2867 // must be set to -1 at code generation time 2868 assert(((__ offset() + 1) % BytesPerWord) == 0, "must be aligned"); 2869 // On 64bit this will die since it will take a movq & jmp, must be only a jmp 2870 __ jump(RuntimeAddress(__ pc())); 2871 2872 if (UseAOT) { 2873 // Trampoline to aot code 2874 __ relocate(static_stub_Relocation::spec(call_pc, true /* is_aot */)); 2875 #ifdef _LP64 2876 __ mov64(rax, CONST64(0)); // address is zapped till fixup time. 2877 #else 2878 __ movl(rax, 0xdeadffff); // address is zapped till fixup time. 2879 #endif 2880 __ jmp(rax); 2881 } 2882 assert(__ offset() - start <= call_stub_size(), "stub too big"); 2883 __ end_a_stub(); 2884 } 2885 2886 2887 void LIR_Assembler::throw_op(LIR_Opr exceptionPC, LIR_Opr exceptionOop, CodeEmitInfo* info) { 2888 assert(exceptionOop->as_register() == rax, "must match"); 2889 assert(exceptionPC->as_register() == rdx, "must match"); 2890 2891 // exception object is not added to oop map by LinearScan 2892 // (LinearScan assumes that no oops are in fixed registers) 2893 info->add_register_oop(exceptionOop); 2894 Runtime1::StubID unwind_id; 2895 2896 // get current pc information 2897 // pc is only needed if the method has an exception handler, the unwind code does not need it. 2898 int pc_for_athrow_offset = __ offset(); 2899 InternalAddress pc_for_athrow(__ pc()); 2900 __ lea(exceptionPC->as_register(), pc_for_athrow); 2901 add_call_info(pc_for_athrow_offset, info); // for exception handler 2902 2903 __ verify_not_null_oop(rax); 2904 // search an exception handler (rax: exception oop, rdx: throwing pc) 2905 if (compilation()->has_fpu_code()) { 2906 unwind_id = Runtime1::handle_exception_id; 2907 } else { 2908 unwind_id = Runtime1::handle_exception_nofpu_id; 2909 } 2910 __ call(RuntimeAddress(Runtime1::entry_for(unwind_id))); 2911 2912 // enough room for two byte trap 2913 __ nop(); 2914 } 2915 2916 2917 void LIR_Assembler::unwind_op(LIR_Opr exceptionOop) { 2918 assert(exceptionOop->as_register() == rax, "must match"); 2919 2920 __ jmp(_unwind_handler_entry); 2921 } 2922 2923 2924 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, LIR_Opr count, LIR_Opr dest, LIR_Opr tmp) { 2925 2926 // optimized version for linear scan: 2927 // * count must be already in ECX (guaranteed by LinearScan) 2928 // * left and dest must be equal 2929 // * tmp must be unused 2930 assert(count->as_register() == SHIFT_count, "count must be in ECX"); 2931 assert(left == dest, "left and dest must be equal"); 2932 assert(tmp->is_illegal(), "wasting a register if tmp is allocated"); 2933 2934 if (left->is_single_cpu()) { 2935 Register value = left->as_register(); 2936 assert(value != SHIFT_count, "left cannot be ECX"); 2937 2938 switch (code) { 2939 case lir_shl: __ shll(value); break; 2940 case lir_shr: __ sarl(value); break; 2941 case lir_ushr: __ shrl(value); break; 2942 default: ShouldNotReachHere(); 2943 } 2944 } else if (left->is_double_cpu()) { 2945 Register lo = left->as_register_lo(); 2946 Register hi = left->as_register_hi(); 2947 assert(lo != SHIFT_count && hi != SHIFT_count, "left cannot be ECX"); 2948 #ifdef _LP64 2949 switch (code) { 2950 case lir_shl: __ shlptr(lo); break; 2951 case lir_shr: __ sarptr(lo); break; 2952 case lir_ushr: __ shrptr(lo); break; 2953 default: ShouldNotReachHere(); 2954 } 2955 #else 2956 2957 switch (code) { 2958 case lir_shl: __ lshl(hi, lo); break; 2959 case lir_shr: __ lshr(hi, lo, true); break; 2960 case lir_ushr: __ lshr(hi, lo, false); break; 2961 default: ShouldNotReachHere(); 2962 } 2963 #endif // LP64 2964 } else { 2965 ShouldNotReachHere(); 2966 } 2967 } 2968 2969 2970 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, jint count, LIR_Opr dest) { 2971 if (dest->is_single_cpu()) { 2972 // first move left into dest so that left is not destroyed by the shift 2973 Register value = dest->as_register(); 2974 count = count & 0x1F; // Java spec 2975 2976 move_regs(left->as_register(), value); 2977 switch (code) { 2978 case lir_shl: __ shll(value, count); break; 2979 case lir_shr: __ sarl(value, count); break; 2980 case lir_ushr: __ shrl(value, count); break; 2981 default: ShouldNotReachHere(); 2982 } 2983 } else if (dest->is_double_cpu()) { 2984 #ifndef _LP64 2985 Unimplemented(); 2986 #else 2987 // first move left into dest so that left is not destroyed by the shift 2988 Register value = dest->as_register_lo(); 2989 count = count & 0x1F; // Java spec 2990 2991 move_regs(left->as_register_lo(), value); 2992 switch (code) { 2993 case lir_shl: __ shlptr(value, count); break; 2994 case lir_shr: __ sarptr(value, count); break; 2995 case lir_ushr: __ shrptr(value, count); break; 2996 default: ShouldNotReachHere(); 2997 } 2998 #endif // _LP64 2999 } else { 3000 ShouldNotReachHere(); 3001 } 3002 } 3003 3004 3005 void LIR_Assembler::store_parameter(Register r, int offset_from_rsp_in_words) { 3006 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 3007 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 3008 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 3009 __ movptr (Address(rsp, offset_from_rsp_in_bytes), r); 3010 } 3011 3012 3013 void LIR_Assembler::store_parameter(jint c, int offset_from_rsp_in_words) { 3014 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 3015 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 3016 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 3017 __ movptr (Address(rsp, offset_from_rsp_in_bytes), c); 3018 } 3019 3020 3021 void LIR_Assembler::store_parameter(jobject o, int offset_from_rsp_in_words) { 3022 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 3023 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 3024 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 3025 __ movoop (Address(rsp, offset_from_rsp_in_bytes), o); 3026 } 3027 3028 3029 void LIR_Assembler::store_parameter(Metadata* m, int offset_from_rsp_in_words) { 3030 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 3031 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 3032 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 3033 __ mov_metadata(Address(rsp, offset_from_rsp_in_bytes), m); 3034 } 3035 3036 3037 // This code replaces a call to arraycopy; no exception may 3038 // be thrown in this code, they must be thrown in the System.arraycopy 3039 // activation frame; we could save some checks if this would not be the case 3040 void LIR_Assembler::emit_arraycopy(LIR_OpArrayCopy* op) { 3041 ciArrayKlass* default_type = op->expected_type(); 3042 Register src = op->src()->as_register(); 3043 Register dst = op->dst()->as_register(); 3044 Register src_pos = op->src_pos()->as_register(); 3045 Register dst_pos = op->dst_pos()->as_register(); 3046 Register length = op->length()->as_register(); 3047 Register tmp = op->tmp()->as_register(); 3048 3049 __ resolve(ACCESS_READ, src); 3050 __ resolve(ACCESS_WRITE, dst); 3051 3052 CodeStub* stub = op->stub(); 3053 int flags = op->flags(); 3054 BasicType basic_type = default_type != NULL ? default_type->element_type()->basic_type() : T_ILLEGAL; 3055 if (basic_type == T_ARRAY) basic_type = T_OBJECT; 3056 3057 // if we don't know anything, just go through the generic arraycopy 3058 if (default_type == NULL) { 3059 // save outgoing arguments on stack in case call to System.arraycopy is needed 3060 // HACK ALERT. This code used to push the parameters in a hardwired fashion 3061 // for interpreter calling conventions. Now we have to do it in new style conventions. 3062 // For the moment until C1 gets the new register allocator I just force all the 3063 // args to the right place (except the register args) and then on the back side 3064 // reload the register args properly if we go slow path. Yuck 3065 3066 // These are proper for the calling convention 3067 store_parameter(length, 2); 3068 store_parameter(dst_pos, 1); 3069 store_parameter(dst, 0); 3070 3071 // these are just temporary placements until we need to reload 3072 store_parameter(src_pos, 3); 3073 store_parameter(src, 4); 3074 NOT_LP64(assert(src == rcx && src_pos == rdx, "mismatch in calling convention");) 3075 3076 address copyfunc_addr = StubRoutines::generic_arraycopy(); 3077 assert(copyfunc_addr != NULL, "generic arraycopy stub required"); 3078 3079 // pass arguments: may push as this is not a safepoint; SP must be fix at each safepoint 3080 #ifdef _LP64 3081 // The arguments are in java calling convention so we can trivially shift them to C 3082 // convention 3083 assert_different_registers(c_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4); 3084 __ mov(c_rarg0, j_rarg0); 3085 assert_different_registers(c_rarg1, j_rarg2, j_rarg3, j_rarg4); 3086 __ mov(c_rarg1, j_rarg1); 3087 assert_different_registers(c_rarg2, j_rarg3, j_rarg4); 3088 __ mov(c_rarg2, j_rarg2); 3089 assert_different_registers(c_rarg3, j_rarg4); 3090 __ mov(c_rarg3, j_rarg3); 3091 #ifdef _WIN64 3092 // Allocate abi space for args but be sure to keep stack aligned 3093 __ subptr(rsp, 6*wordSize); 3094 store_parameter(j_rarg4, 4); 3095 #ifndef PRODUCT 3096 if (PrintC1Statistics) { 3097 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt)); 3098 } 3099 #endif 3100 __ call(RuntimeAddress(copyfunc_addr)); 3101 __ addptr(rsp, 6*wordSize); 3102 #else 3103 __ mov(c_rarg4, j_rarg4); 3104 #ifndef PRODUCT 3105 if (PrintC1Statistics) { 3106 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt)); 3107 } 3108 #endif 3109 __ call(RuntimeAddress(copyfunc_addr)); 3110 #endif // _WIN64 3111 #else 3112 __ push(length); 3113 __ push(dst_pos); 3114 __ push(dst); 3115 __ push(src_pos); 3116 __ push(src); 3117 3118 #ifndef PRODUCT 3119 if (PrintC1Statistics) { 3120 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt)); 3121 } 3122 #endif 3123 __ call_VM_leaf(copyfunc_addr, 5); // removes pushed parameter from the stack 3124 3125 #endif // _LP64 3126 3127 __ cmpl(rax, 0); 3128 __ jcc(Assembler::equal, *stub->continuation()); 3129 3130 __ mov(tmp, rax); 3131 __ xorl(tmp, -1); 3132 3133 // Reload values from the stack so they are where the stub 3134 // expects them. 3135 __ movptr (dst, Address(rsp, 0*BytesPerWord)); 3136 __ movptr (dst_pos, Address(rsp, 1*BytesPerWord)); 3137 __ movptr (length, Address(rsp, 2*BytesPerWord)); 3138 __ movptr (src_pos, Address(rsp, 3*BytesPerWord)); 3139 __ movptr (src, Address(rsp, 4*BytesPerWord)); 3140 3141 __ subl(length, tmp); 3142 __ addl(src_pos, tmp); 3143 __ addl(dst_pos, tmp); 3144 __ jmp(*stub->entry()); 3145 3146 __ bind(*stub->continuation()); 3147 return; 3148 } 3149 3150 assert(default_type != NULL && default_type->is_array_klass() && default_type->is_loaded(), "must be true at this point"); 3151 3152 int elem_size = type2aelembytes(basic_type); 3153 Address::ScaleFactor scale; 3154 3155 switch (elem_size) { 3156 case 1 : 3157 scale = Address::times_1; 3158 break; 3159 case 2 : 3160 scale = Address::times_2; 3161 break; 3162 case 4 : 3163 scale = Address::times_4; 3164 break; 3165 case 8 : 3166 scale = Address::times_8; 3167 break; 3168 default: 3169 scale = Address::no_scale; 3170 ShouldNotReachHere(); 3171 } 3172 3173 Address src_length_addr = Address(src, arrayOopDesc::length_offset_in_bytes()); 3174 Address dst_length_addr = Address(dst, arrayOopDesc::length_offset_in_bytes()); 3175 Address src_klass_addr = Address(src, oopDesc::klass_offset_in_bytes()); 3176 Address dst_klass_addr = Address(dst, oopDesc::klass_offset_in_bytes()); 3177 3178 // length and pos's are all sign extended at this point on 64bit 3179 3180 // test for NULL 3181 if (flags & LIR_OpArrayCopy::src_null_check) { 3182 __ testptr(src, src); 3183 __ jcc(Assembler::zero, *stub->entry()); 3184 } 3185 if (flags & LIR_OpArrayCopy::dst_null_check) { 3186 __ testptr(dst, dst); 3187 __ jcc(Assembler::zero, *stub->entry()); 3188 } 3189 3190 // If the compiler was not able to prove that exact type of the source or the destination 3191 // of the arraycopy is an array type, check at runtime if the source or the destination is 3192 // an instance type. 3193 if (flags & LIR_OpArrayCopy::type_check) { 3194 if (!(flags & LIR_OpArrayCopy::dst_objarray)) { 3195 __ load_klass(tmp, dst); 3196 __ cmpl(Address(tmp, in_bytes(Klass::layout_helper_offset())), Klass::_lh_neutral_value); 3197 __ jcc(Assembler::greaterEqual, *stub->entry()); 3198 } 3199 3200 if (!(flags & LIR_OpArrayCopy::src_objarray)) { 3201 __ load_klass(tmp, src); 3202 __ cmpl(Address(tmp, in_bytes(Klass::layout_helper_offset())), Klass::_lh_neutral_value); 3203 __ jcc(Assembler::greaterEqual, *stub->entry()); 3204 } 3205 } 3206 3207 // check if negative 3208 if (flags & LIR_OpArrayCopy::src_pos_positive_check) { 3209 __ testl(src_pos, src_pos); 3210 __ jcc(Assembler::less, *stub->entry()); 3211 } 3212 if (flags & LIR_OpArrayCopy::dst_pos_positive_check) { 3213 __ testl(dst_pos, dst_pos); 3214 __ jcc(Assembler::less, *stub->entry()); 3215 } 3216 3217 if (flags & LIR_OpArrayCopy::src_range_check) { 3218 __ lea(tmp, Address(src_pos, length, Address::times_1, 0)); 3219 __ cmpl(tmp, src_length_addr); 3220 __ jcc(Assembler::above, *stub->entry()); 3221 } 3222 if (flags & LIR_OpArrayCopy::dst_range_check) { 3223 __ lea(tmp, Address(dst_pos, length, Address::times_1, 0)); 3224 __ cmpl(tmp, dst_length_addr); 3225 __ jcc(Assembler::above, *stub->entry()); 3226 } 3227 3228 if (flags & LIR_OpArrayCopy::length_positive_check) { 3229 __ testl(length, length); 3230 __ jcc(Assembler::less, *stub->entry()); 3231 } 3232 3233 #ifdef _LP64 3234 __ movl2ptr(src_pos, src_pos); //higher 32bits must be null 3235 __ movl2ptr(dst_pos, dst_pos); //higher 32bits must be null 3236 #endif 3237 3238 if (flags & LIR_OpArrayCopy::type_check) { 3239 // We don't know the array types are compatible 3240 if (basic_type != T_OBJECT) { 3241 // Simple test for basic type arrays 3242 if (UseCompressedClassPointers) { 3243 __ movl(tmp, src_klass_addr); 3244 __ cmpl(tmp, dst_klass_addr); 3245 } else { 3246 __ movptr(tmp, src_klass_addr); 3247 __ cmpptr(tmp, dst_klass_addr); 3248 } 3249 __ jcc(Assembler::notEqual, *stub->entry()); 3250 } else { 3251 // For object arrays, if src is a sub class of dst then we can 3252 // safely do the copy. 3253 Label cont, slow; 3254 3255 __ push(src); 3256 __ push(dst); 3257 3258 __ load_klass(src, src); 3259 __ load_klass(dst, dst); 3260 3261 __ check_klass_subtype_fast_path(src, dst, tmp, &cont, &slow, NULL); 3262 3263 __ push(src); 3264 __ push(dst); 3265 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 3266 __ pop(dst); 3267 __ pop(src); 3268 3269 __ cmpl(src, 0); 3270 __ jcc(Assembler::notEqual, cont); 3271 3272 __ bind(slow); 3273 __ pop(dst); 3274 __ pop(src); 3275 3276 address copyfunc_addr = StubRoutines::checkcast_arraycopy(); 3277 if (copyfunc_addr != NULL) { // use stub if available 3278 // src is not a sub class of dst so we have to do a 3279 // per-element check. 3280 3281 int mask = LIR_OpArrayCopy::src_objarray|LIR_OpArrayCopy::dst_objarray; 3282 if ((flags & mask) != mask) { 3283 // Check that at least both of them object arrays. 3284 assert(flags & mask, "one of the two should be known to be an object array"); 3285 3286 if (!(flags & LIR_OpArrayCopy::src_objarray)) { 3287 __ load_klass(tmp, src); 3288 } else if (!(flags & LIR_OpArrayCopy::dst_objarray)) { 3289 __ load_klass(tmp, dst); 3290 } 3291 int lh_offset = in_bytes(Klass::layout_helper_offset()); 3292 Address klass_lh_addr(tmp, lh_offset); 3293 jint objArray_lh = Klass::array_layout_helper(T_OBJECT); 3294 __ cmpl(klass_lh_addr, objArray_lh); 3295 __ jcc(Assembler::notEqual, *stub->entry()); 3296 } 3297 3298 // Spill because stubs can use any register they like and it's 3299 // easier to restore just those that we care about. 3300 store_parameter(dst, 0); 3301 store_parameter(dst_pos, 1); 3302 store_parameter(length, 2); 3303 store_parameter(src_pos, 3); 3304 store_parameter(src, 4); 3305 3306 #ifndef _LP64 3307 __ movptr(tmp, dst_klass_addr); 3308 __ movptr(tmp, Address(tmp, ObjArrayKlass::element_klass_offset())); 3309 __ push(tmp); 3310 __ movl(tmp, Address(tmp, Klass::super_check_offset_offset())); 3311 __ push(tmp); 3312 __ push(length); 3313 __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3314 __ push(tmp); 3315 __ lea(tmp, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3316 __ push(tmp); 3317 3318 __ call_VM_leaf(copyfunc_addr, 5); 3319 #else 3320 __ movl2ptr(length, length); //higher 32bits must be null 3321 3322 __ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3323 assert_different_registers(c_rarg0, dst, dst_pos, length); 3324 __ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3325 assert_different_registers(c_rarg1, dst, length); 3326 3327 __ mov(c_rarg2, length); 3328 assert_different_registers(c_rarg2, dst); 3329 3330 #ifdef _WIN64 3331 // Allocate abi space for args but be sure to keep stack aligned 3332 __ subptr(rsp, 6*wordSize); 3333 __ load_klass(c_rarg3, dst); 3334 __ movptr(c_rarg3, Address(c_rarg3, ObjArrayKlass::element_klass_offset())); 3335 store_parameter(c_rarg3, 4); 3336 __ movl(c_rarg3, Address(c_rarg3, Klass::super_check_offset_offset())); 3337 __ call(RuntimeAddress(copyfunc_addr)); 3338 __ addptr(rsp, 6*wordSize); 3339 #else 3340 __ load_klass(c_rarg4, dst); 3341 __ movptr(c_rarg4, Address(c_rarg4, ObjArrayKlass::element_klass_offset())); 3342 __ movl(c_rarg3, Address(c_rarg4, Klass::super_check_offset_offset())); 3343 __ call(RuntimeAddress(copyfunc_addr)); 3344 #endif 3345 3346 #endif 3347 3348 #ifndef PRODUCT 3349 if (PrintC1Statistics) { 3350 Label failed; 3351 __ testl(rax, rax); 3352 __ jcc(Assembler::notZero, failed); 3353 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_cnt)); 3354 __ bind(failed); 3355 } 3356 #endif 3357 3358 __ testl(rax, rax); 3359 __ jcc(Assembler::zero, *stub->continuation()); 3360 3361 #ifndef PRODUCT 3362 if (PrintC1Statistics) { 3363 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_attempt_cnt)); 3364 } 3365 #endif 3366 3367 __ mov(tmp, rax); 3368 3369 __ xorl(tmp, -1); 3370 3371 // Restore previously spilled arguments 3372 __ movptr (dst, Address(rsp, 0*BytesPerWord)); 3373 __ movptr (dst_pos, Address(rsp, 1*BytesPerWord)); 3374 __ movptr (length, Address(rsp, 2*BytesPerWord)); 3375 __ movptr (src_pos, Address(rsp, 3*BytesPerWord)); 3376 __ movptr (src, Address(rsp, 4*BytesPerWord)); 3377 3378 3379 __ subl(length, tmp); 3380 __ addl(src_pos, tmp); 3381 __ addl(dst_pos, tmp); 3382 } 3383 3384 __ jmp(*stub->entry()); 3385 3386 __ bind(cont); 3387 __ pop(dst); 3388 __ pop(src); 3389 } 3390 } 3391 3392 #ifdef ASSERT 3393 if (basic_type != T_OBJECT || !(flags & LIR_OpArrayCopy::type_check)) { 3394 // Sanity check the known type with the incoming class. For the 3395 // primitive case the types must match exactly with src.klass and 3396 // dst.klass each exactly matching the default type. For the 3397 // object array case, if no type check is needed then either the 3398 // dst type is exactly the expected type and the src type is a 3399 // subtype which we can't check or src is the same array as dst 3400 // but not necessarily exactly of type default_type. 3401 Label known_ok, halt; 3402 __ mov_metadata(tmp, default_type->constant_encoding()); 3403 #ifdef _LP64 3404 if (UseCompressedClassPointers) { 3405 __ encode_klass_not_null(tmp); 3406 } 3407 #endif 3408 3409 if (basic_type != T_OBJECT) { 3410 3411 if (UseCompressedClassPointers) __ cmpl(tmp, dst_klass_addr); 3412 else __ cmpptr(tmp, dst_klass_addr); 3413 __ jcc(Assembler::notEqual, halt); 3414 if (UseCompressedClassPointers) __ cmpl(tmp, src_klass_addr); 3415 else __ cmpptr(tmp, src_klass_addr); 3416 __ jcc(Assembler::equal, known_ok); 3417 } else { 3418 if (UseCompressedClassPointers) __ cmpl(tmp, dst_klass_addr); 3419 else __ cmpptr(tmp, dst_klass_addr); 3420 __ jcc(Assembler::equal, known_ok); 3421 __ cmpptr(src, dst); 3422 __ jcc(Assembler::equal, known_ok); 3423 } 3424 __ bind(halt); 3425 __ stop("incorrect type information in arraycopy"); 3426 __ bind(known_ok); 3427 } 3428 #endif 3429 3430 #ifndef PRODUCT 3431 if (PrintC1Statistics) { 3432 __ incrementl(ExternalAddress(Runtime1::arraycopy_count_address(basic_type))); 3433 } 3434 #endif 3435 3436 #ifdef _LP64 3437 assert_different_registers(c_rarg0, dst, dst_pos, length); 3438 __ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3439 assert_different_registers(c_rarg1, length); 3440 __ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3441 __ mov(c_rarg2, length); 3442 3443 #else 3444 __ lea(tmp, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3445 store_parameter(tmp, 0); 3446 __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3447 store_parameter(tmp, 1); 3448 store_parameter(length, 2); 3449 #endif // _LP64 3450 3451 bool disjoint = (flags & LIR_OpArrayCopy::overlapping) == 0; 3452 bool aligned = (flags & LIR_OpArrayCopy::unaligned) == 0; 3453 const char *name; 3454 address entry = StubRoutines::select_arraycopy_function(basic_type, aligned, disjoint, name, false); 3455 __ call_VM_leaf(entry, 0); 3456 3457 __ bind(*stub->continuation()); 3458 } 3459 3460 void LIR_Assembler::emit_updatecrc32(LIR_OpUpdateCRC32* op) { 3461 assert(op->crc()->is_single_cpu(), "crc must be register"); 3462 assert(op->val()->is_single_cpu(), "byte value must be register"); 3463 assert(op->result_opr()->is_single_cpu(), "result must be register"); 3464 Register crc = op->crc()->as_register(); 3465 Register val = op->val()->as_register(); 3466 Register res = op->result_opr()->as_register(); 3467 3468 assert_different_registers(val, crc, res); 3469 3470 __ lea(res, ExternalAddress(StubRoutines::crc_table_addr())); 3471 __ notl(crc); // ~crc 3472 __ update_byte_crc32(crc, val, res); 3473 __ notl(crc); // ~crc 3474 __ mov(res, crc); 3475 } 3476 3477 void LIR_Assembler::emit_lock(LIR_OpLock* op) { 3478 Register obj = op->obj_opr()->as_register(); // may not be an oop 3479 Register hdr = op->hdr_opr()->as_register(); 3480 Register lock = op->lock_opr()->as_register(); 3481 if (!UseFastLocking) { 3482 __ jmp(*op->stub()->entry()); 3483 } else if (op->code() == lir_lock) { 3484 Register scratch = noreg; 3485 if (UseBiasedLocking) { 3486 scratch = op->scratch_opr()->as_register(); 3487 } 3488 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header"); 3489 __ resolve(ACCESS_READ | ACCESS_WRITE, obj); 3490 // add debug info for NullPointerException only if one is possible 3491 int null_check_offset = __ lock_object(hdr, obj, lock, scratch, *op->stub()->entry()); 3492 if (op->info() != NULL) { 3493 add_debug_info_for_null_check(null_check_offset, op->info()); 3494 } 3495 // done 3496 } else if (op->code() == lir_unlock) { 3497 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header"); 3498 __ unlock_object(hdr, obj, lock, *op->stub()->entry()); 3499 } else { 3500 Unimplemented(); 3501 } 3502 __ bind(*op->stub()->continuation()); 3503 } 3504 3505 3506 void LIR_Assembler::emit_profile_call(LIR_OpProfileCall* op) { 3507 ciMethod* method = op->profiled_method(); 3508 int bci = op->profiled_bci(); 3509 ciMethod* callee = op->profiled_callee(); 3510 3511 // Update counter for all call types 3512 ciMethodData* md = method->method_data_or_null(); 3513 assert(md != NULL, "Sanity"); 3514 ciProfileData* data = md->bci_to_data(bci); 3515 assert(data != NULL && data->is_CounterData(), "need CounterData for calls"); 3516 assert(op->mdo()->is_single_cpu(), "mdo must be allocated"); 3517 Register mdo = op->mdo()->as_register(); 3518 __ mov_metadata(mdo, md->constant_encoding()); 3519 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset())); 3520 // Perform additional virtual call profiling for invokevirtual and 3521 // invokeinterface bytecodes 3522 if (op->should_profile_receiver_type()) { 3523 assert(op->recv()->is_single_cpu(), "recv must be allocated"); 3524 Register recv = op->recv()->as_register(); 3525 assert_different_registers(mdo, recv); 3526 assert(data->is_VirtualCallData(), "need VirtualCallData for virtual calls"); 3527 ciKlass* known_klass = op->known_holder(); 3528 if (C1OptimizeVirtualCallProfiling && known_klass != NULL) { 3529 // We know the type that will be seen at this call site; we can 3530 // statically update the MethodData* rather than needing to do 3531 // dynamic tests on the receiver type 3532 3533 // NOTE: we should probably put a lock around this search to 3534 // avoid collisions by concurrent compilations 3535 ciVirtualCallData* vc_data = (ciVirtualCallData*) data; 3536 uint i; 3537 for (i = 0; i < VirtualCallData::row_limit(); i++) { 3538 ciKlass* receiver = vc_data->receiver(i); 3539 if (known_klass->equals(receiver)) { 3540 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i))); 3541 __ addptr(data_addr, DataLayout::counter_increment); 3542 return; 3543 } 3544 } 3545 3546 // Receiver type not found in profile data; select an empty slot 3547 3548 // Note that this is less efficient than it should be because it 3549 // always does a write to the receiver part of the 3550 // VirtualCallData rather than just the first time 3551 for (i = 0; i < VirtualCallData::row_limit(); i++) { 3552 ciKlass* receiver = vc_data->receiver(i); 3553 if (receiver == NULL) { 3554 Address recv_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_offset(i))); 3555 __ mov_metadata(recv_addr, known_klass->constant_encoding()); 3556 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i))); 3557 __ addptr(data_addr, DataLayout::counter_increment); 3558 return; 3559 } 3560 } 3561 } else { 3562 __ load_klass(recv, recv); 3563 Label update_done; 3564 type_profile_helper(mdo, md, data, recv, &update_done); 3565 // Receiver did not match any saved receiver and there is no empty row for it. 3566 // Increment total counter to indicate polymorphic case. 3567 __ addptr(counter_addr, DataLayout::counter_increment); 3568 3569 __ bind(update_done); 3570 } 3571 } else { 3572 // Static call 3573 __ addptr(counter_addr, DataLayout::counter_increment); 3574 } 3575 } 3576 3577 void LIR_Assembler::emit_profile_type(LIR_OpProfileType* op) { 3578 Register obj = op->obj()->as_register(); 3579 Register tmp = op->tmp()->as_pointer_register(); 3580 Address mdo_addr = as_Address(op->mdp()->as_address_ptr()); 3581 ciKlass* exact_klass = op->exact_klass(); 3582 intptr_t current_klass = op->current_klass(); 3583 bool not_null = op->not_null(); 3584 bool no_conflict = op->no_conflict(); 3585 3586 Label update, next, none; 3587 3588 bool do_null = !not_null; 3589 bool exact_klass_set = exact_klass != NULL && ciTypeEntries::valid_ciklass(current_klass) == exact_klass; 3590 bool do_update = !TypeEntries::is_type_unknown(current_klass) && !exact_klass_set; 3591 3592 assert(do_null || do_update, "why are we here?"); 3593 assert(!TypeEntries::was_null_seen(current_klass) || do_update, "why are we here?"); 3594 3595 __ verify_oop(obj); 3596 3597 if (tmp != obj) { 3598 __ mov(tmp, obj); 3599 } 3600 if (do_null) { 3601 __ testptr(tmp, tmp); 3602 __ jccb(Assembler::notZero, update); 3603 if (!TypeEntries::was_null_seen(current_klass)) { 3604 __ orptr(mdo_addr, TypeEntries::null_seen); 3605 } 3606 if (do_update) { 3607 #ifndef ASSERT 3608 __ jmpb(next); 3609 } 3610 #else 3611 __ jmp(next); 3612 } 3613 } else { 3614 __ testptr(tmp, tmp); 3615 __ jcc(Assembler::notZero, update); 3616 __ stop("unexpect null obj"); 3617 #endif 3618 } 3619 3620 __ bind(update); 3621 3622 if (do_update) { 3623 #ifdef ASSERT 3624 if (exact_klass != NULL) { 3625 Label ok; 3626 __ load_klass(tmp, tmp); 3627 __ push(tmp); 3628 __ mov_metadata(tmp, exact_klass->constant_encoding()); 3629 __ cmpptr(tmp, Address(rsp, 0)); 3630 __ jcc(Assembler::equal, ok); 3631 __ stop("exact klass and actual klass differ"); 3632 __ bind(ok); 3633 __ pop(tmp); 3634 } 3635 #endif 3636 if (!no_conflict) { 3637 if (exact_klass == NULL || TypeEntries::is_type_none(current_klass)) { 3638 if (exact_klass != NULL) { 3639 __ mov_metadata(tmp, exact_klass->constant_encoding()); 3640 } else { 3641 __ load_klass(tmp, tmp); 3642 } 3643 3644 __ xorptr(tmp, mdo_addr); 3645 __ testptr(tmp, TypeEntries::type_klass_mask); 3646 // klass seen before, nothing to do. The unknown bit may have been 3647 // set already but no need to check. 3648 __ jccb(Assembler::zero, next); 3649 3650 __ testptr(tmp, TypeEntries::type_unknown); 3651 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore. 3652 3653 if (TypeEntries::is_type_none(current_klass)) { 3654 __ cmpptr(mdo_addr, 0); 3655 __ jccb(Assembler::equal, none); 3656 __ cmpptr(mdo_addr, TypeEntries::null_seen); 3657 __ jccb(Assembler::equal, none); 3658 // There is a chance that the checks above (re-reading profiling 3659 // data from memory) fail if another thread has just set the 3660 // profiling to this obj's klass 3661 __ xorptr(tmp, mdo_addr); 3662 __ testptr(tmp, TypeEntries::type_klass_mask); 3663 __ jccb(Assembler::zero, next); 3664 } 3665 } else { 3666 assert(ciTypeEntries::valid_ciklass(current_klass) != NULL && 3667 ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "conflict only"); 3668 3669 __ movptr(tmp, mdo_addr); 3670 __ testptr(tmp, TypeEntries::type_unknown); 3671 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore. 3672 } 3673 3674 // different than before. Cannot keep accurate profile. 3675 __ orptr(mdo_addr, TypeEntries::type_unknown); 3676 3677 if (TypeEntries::is_type_none(current_klass)) { 3678 __ jmpb(next); 3679 3680 __ bind(none); 3681 // first time here. Set profile type. 3682 __ movptr(mdo_addr, tmp); 3683 } 3684 } else { 3685 // There's a single possible klass at this profile point 3686 assert(exact_klass != NULL, "should be"); 3687 if (TypeEntries::is_type_none(current_klass)) { 3688 __ mov_metadata(tmp, exact_klass->constant_encoding()); 3689 __ xorptr(tmp, mdo_addr); 3690 __ testptr(tmp, TypeEntries::type_klass_mask); 3691 #ifdef ASSERT 3692 __ jcc(Assembler::zero, next); 3693 3694 { 3695 Label ok; 3696 __ push(tmp); 3697 __ cmpptr(mdo_addr, 0); 3698 __ jcc(Assembler::equal, ok); 3699 __ cmpptr(mdo_addr, TypeEntries::null_seen); 3700 __ jcc(Assembler::equal, ok); 3701 // may have been set by another thread 3702 __ mov_metadata(tmp, exact_klass->constant_encoding()); 3703 __ xorptr(tmp, mdo_addr); 3704 __ testptr(tmp, TypeEntries::type_mask); 3705 __ jcc(Assembler::zero, ok); 3706 3707 __ stop("unexpected profiling mismatch"); 3708 __ bind(ok); 3709 __ pop(tmp); 3710 } 3711 #else 3712 __ jccb(Assembler::zero, next); 3713 #endif 3714 // first time here. Set profile type. 3715 __ movptr(mdo_addr, tmp); 3716 } else { 3717 assert(ciTypeEntries::valid_ciklass(current_klass) != NULL && 3718 ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "inconsistent"); 3719 3720 __ movptr(tmp, mdo_addr); 3721 __ testptr(tmp, TypeEntries::type_unknown); 3722 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore. 3723 3724 __ orptr(mdo_addr, TypeEntries::type_unknown); 3725 } 3726 } 3727 3728 __ bind(next); 3729 } 3730 } 3731 3732 void LIR_Assembler::emit_delay(LIR_OpDelay*) { 3733 Unimplemented(); 3734 } 3735 3736 3737 void LIR_Assembler::monitor_address(int monitor_no, LIR_Opr dst) { 3738 __ lea(dst->as_register(), frame_map()->address_for_monitor_lock(monitor_no)); 3739 } 3740 3741 3742 void LIR_Assembler::align_backward_branch_target() { 3743 __ align(BytesPerWord); 3744 } 3745 3746 3747 void LIR_Assembler::negate(LIR_Opr left, LIR_Opr dest, LIR_Opr tmp) { 3748 if (left->is_single_cpu()) { 3749 __ negl(left->as_register()); 3750 move_regs(left->as_register(), dest->as_register()); 3751 3752 } else if (left->is_double_cpu()) { 3753 Register lo = left->as_register_lo(); 3754 #ifdef _LP64 3755 Register dst = dest->as_register_lo(); 3756 __ movptr(dst, lo); 3757 __ negptr(dst); 3758 #else 3759 Register hi = left->as_register_hi(); 3760 __ lneg(hi, lo); 3761 if (dest->as_register_lo() == hi) { 3762 assert(dest->as_register_hi() != lo, "destroying register"); 3763 move_regs(hi, dest->as_register_hi()); 3764 move_regs(lo, dest->as_register_lo()); 3765 } else { 3766 move_regs(lo, dest->as_register_lo()); 3767 move_regs(hi, dest->as_register_hi()); 3768 } 3769 #endif // _LP64 3770 3771 } else if (dest->is_single_xmm()) { 3772 #ifdef _LP64 3773 if (UseAVX > 2 && !VM_Version::supports_avx512vl()) { 3774 assert(tmp->is_valid(), "need temporary"); 3775 assert_different_registers(left->as_xmm_float_reg(), tmp->as_xmm_float_reg()); 3776 __ vpxor(dest->as_xmm_float_reg(), tmp->as_xmm_float_reg(), left->as_xmm_float_reg(), 2); 3777 } 3778 else 3779 #endif 3780 { 3781 assert(!tmp->is_valid(), "do not need temporary"); 3782 if (left->as_xmm_float_reg() != dest->as_xmm_float_reg()) { 3783 __ movflt(dest->as_xmm_float_reg(), left->as_xmm_float_reg()); 3784 } 3785 __ xorps(dest->as_xmm_float_reg(), 3786 ExternalAddress((address)float_signflip_pool)); 3787 } 3788 } else if (dest->is_double_xmm()) { 3789 #ifdef _LP64 3790 if (UseAVX > 2 && !VM_Version::supports_avx512vl()) { 3791 assert(tmp->is_valid(), "need temporary"); 3792 assert_different_registers(left->as_xmm_double_reg(), tmp->as_xmm_double_reg()); 3793 __ vpxor(dest->as_xmm_double_reg(), tmp->as_xmm_double_reg(), left->as_xmm_double_reg(), 2); 3794 } 3795 else 3796 #endif 3797 { 3798 assert(!tmp->is_valid(), "do not need temporary"); 3799 if (left->as_xmm_double_reg() != dest->as_xmm_double_reg()) { 3800 __ movdbl(dest->as_xmm_double_reg(), left->as_xmm_double_reg()); 3801 } 3802 __ xorpd(dest->as_xmm_double_reg(), 3803 ExternalAddress((address)double_signflip_pool)); 3804 } 3805 } else if (left->is_single_fpu() || left->is_double_fpu()) { 3806 assert(left->fpu() == 0, "arg must be on TOS"); 3807 assert(dest->fpu() == 0, "dest must be TOS"); 3808 __ fchs(); 3809 3810 } else { 3811 ShouldNotReachHere(); 3812 } 3813 } 3814 3815 3816 void LIR_Assembler::leal(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) { 3817 assert(src->is_address(), "must be an address"); 3818 assert(dest->is_register(), "must be a register"); 3819 3820 PatchingStub* patch = NULL; 3821 if (patch_code != lir_patch_none) { 3822 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 3823 } 3824 3825 Register reg = dest->as_pointer_register(); 3826 LIR_Address* addr = src->as_address_ptr(); 3827 __ lea(reg, as_Address(addr)); 3828 3829 if (patch != NULL) { 3830 patching_epilog(patch, patch_code, addr->base()->as_register(), info); 3831 } 3832 } 3833 3834 3835 3836 void LIR_Assembler::rt_call(LIR_Opr result, address dest, const LIR_OprList* args, LIR_Opr tmp, CodeEmitInfo* info) { 3837 assert(!tmp->is_valid(), "don't need temporary"); 3838 __ call(RuntimeAddress(dest)); 3839 if (info != NULL) { 3840 add_call_info_here(info); 3841 } 3842 } 3843 3844 3845 void LIR_Assembler::volatile_move_op(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info) { 3846 assert(type == T_LONG, "only for volatile long fields"); 3847 3848 if (info != NULL) { 3849 add_debug_info_for_null_check_here(info); 3850 } 3851 3852 if (src->is_double_xmm()) { 3853 if (dest->is_double_cpu()) { 3854 #ifdef _LP64 3855 __ movdq(dest->as_register_lo(), src->as_xmm_double_reg()); 3856 #else 3857 __ movdl(dest->as_register_lo(), src->as_xmm_double_reg()); 3858 __ psrlq(src->as_xmm_double_reg(), 32); 3859 __ movdl(dest->as_register_hi(), src->as_xmm_double_reg()); 3860 #endif // _LP64 3861 } else if (dest->is_double_stack()) { 3862 __ movdbl(frame_map()->address_for_slot(dest->double_stack_ix()), src->as_xmm_double_reg()); 3863 } else if (dest->is_address()) { 3864 __ movdbl(as_Address(dest->as_address_ptr()), src->as_xmm_double_reg()); 3865 } else { 3866 ShouldNotReachHere(); 3867 } 3868 3869 } else if (dest->is_double_xmm()) { 3870 if (src->is_double_stack()) { 3871 __ movdbl(dest->as_xmm_double_reg(), frame_map()->address_for_slot(src->double_stack_ix())); 3872 } else if (src->is_address()) { 3873 __ movdbl(dest->as_xmm_double_reg(), as_Address(src->as_address_ptr())); 3874 } else { 3875 ShouldNotReachHere(); 3876 } 3877 3878 } else if (src->is_double_fpu()) { 3879 assert(src->fpu_regnrLo() == 0, "must be TOS"); 3880 if (dest->is_double_stack()) { 3881 __ fistp_d(frame_map()->address_for_slot(dest->double_stack_ix())); 3882 } else if (dest->is_address()) { 3883 __ fistp_d(as_Address(dest->as_address_ptr())); 3884 } else { 3885 ShouldNotReachHere(); 3886 } 3887 3888 } else if (dest->is_double_fpu()) { 3889 assert(dest->fpu_regnrLo() == 0, "must be TOS"); 3890 if (src->is_double_stack()) { 3891 __ fild_d(frame_map()->address_for_slot(src->double_stack_ix())); 3892 } else if (src->is_address()) { 3893 __ fild_d(as_Address(src->as_address_ptr())); 3894 } else { 3895 ShouldNotReachHere(); 3896 } 3897 } else { 3898 ShouldNotReachHere(); 3899 } 3900 } 3901 3902 #ifdef ASSERT 3903 // emit run-time assertion 3904 void LIR_Assembler::emit_assert(LIR_OpAssert* op) { 3905 assert(op->code() == lir_assert, "must be"); 3906 3907 if (op->in_opr1()->is_valid()) { 3908 assert(op->in_opr2()->is_valid(), "both operands must be valid"); 3909 comp_op(op->condition(), op->in_opr1(), op->in_opr2(), op); 3910 } else { 3911 assert(op->in_opr2()->is_illegal(), "both operands must be illegal"); 3912 assert(op->condition() == lir_cond_always, "no other conditions allowed"); 3913 } 3914 3915 Label ok; 3916 if (op->condition() != lir_cond_always) { 3917 Assembler::Condition acond = Assembler::zero; 3918 switch (op->condition()) { 3919 case lir_cond_equal: acond = Assembler::equal; break; 3920 case lir_cond_notEqual: acond = Assembler::notEqual; break; 3921 case lir_cond_less: acond = Assembler::less; break; 3922 case lir_cond_lessEqual: acond = Assembler::lessEqual; break; 3923 case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break; 3924 case lir_cond_greater: acond = Assembler::greater; break; 3925 case lir_cond_belowEqual: acond = Assembler::belowEqual; break; 3926 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; break; 3927 default: ShouldNotReachHere(); 3928 } 3929 __ jcc(acond, ok); 3930 } 3931 if (op->halt()) { 3932 const char* str = __ code_string(op->msg()); 3933 __ stop(str); 3934 } else { 3935 breakpoint(); 3936 } 3937 __ bind(ok); 3938 } 3939 #endif 3940 3941 void LIR_Assembler::membar() { 3942 // QQQ sparc TSO uses this, 3943 __ membar( Assembler::Membar_mask_bits(Assembler::StoreLoad)); 3944 } 3945 3946 void LIR_Assembler::membar_acquire() { 3947 // No x86 machines currently require load fences 3948 } 3949 3950 void LIR_Assembler::membar_release() { 3951 // No x86 machines currently require store fences 3952 } 3953 3954 void LIR_Assembler::membar_loadload() { 3955 // no-op 3956 //__ membar(Assembler::Membar_mask_bits(Assembler::loadload)); 3957 } 3958 3959 void LIR_Assembler::membar_storestore() { 3960 // no-op 3961 //__ membar(Assembler::Membar_mask_bits(Assembler::storestore)); 3962 } 3963 3964 void LIR_Assembler::membar_loadstore() { 3965 // no-op 3966 //__ membar(Assembler::Membar_mask_bits(Assembler::loadstore)); 3967 } 3968 3969 void LIR_Assembler::membar_storeload() { 3970 __ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad)); 3971 } 3972 3973 void LIR_Assembler::on_spin_wait() { 3974 __ pause (); 3975 } 3976 3977 void LIR_Assembler::get_thread(LIR_Opr result_reg) { 3978 assert(result_reg->is_register(), "check"); 3979 #ifdef _LP64 3980 // __ get_thread(result_reg->as_register_lo()); 3981 __ mov(result_reg->as_register(), r15_thread); 3982 #else 3983 __ get_thread(result_reg->as_register()); 3984 #endif // _LP64 3985 } 3986 3987 3988 void LIR_Assembler::peephole(LIR_List*) { 3989 // do nothing for now 3990 } 3991 3992 void LIR_Assembler::atomic_op(LIR_Code code, LIR_Opr src, LIR_Opr data, LIR_Opr dest, LIR_Opr tmp) { 3993 assert(data == dest, "xchg/xadd uses only 2 operands"); 3994 3995 if (data->type() == T_INT) { 3996 if (code == lir_xadd) { 3997 __ lock(); 3998 __ xaddl(as_Address(src->as_address_ptr()), data->as_register()); 3999 } else { 4000 __ xchgl(data->as_register(), as_Address(src->as_address_ptr())); 4001 } 4002 } else if (data->is_oop()) { 4003 assert (code == lir_xchg, "xadd for oops"); 4004 Register obj = data->as_register(); 4005 #ifdef _LP64 4006 if (UseCompressedOops) { 4007 __ encode_heap_oop(obj); 4008 __ xchgl(obj, as_Address(src->as_address_ptr())); 4009 __ decode_heap_oop(obj); 4010 } else { 4011 __ xchgptr(obj, as_Address(src->as_address_ptr())); 4012 } 4013 #else 4014 __ xchgl(obj, as_Address(src->as_address_ptr())); 4015 #endif 4016 } else if (data->type() == T_LONG) { 4017 #ifdef _LP64 4018 assert(data->as_register_lo() == data->as_register_hi(), "should be a single register"); 4019 if (code == lir_xadd) { 4020 __ lock(); 4021 __ xaddq(as_Address(src->as_address_ptr()), data->as_register_lo()); 4022 } else { 4023 __ xchgq(data->as_register_lo(), as_Address(src->as_address_ptr())); 4024 } 4025 #else 4026 ShouldNotReachHere(); 4027 #endif 4028 } else { 4029 ShouldNotReachHere(); 4030 } 4031 } 4032 4033 #undef __