1 /* 2 * Copyright (c) 2000, 2013, 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_interface/collectedHeap.hpp" 36 #include "memory/barrierSet.hpp" 37 #include "memory/cardTableModRefBS.hpp" 38 #include "nativeInst_x86.hpp" 39 #include "oops/objArrayKlass.hpp" 40 #include "runtime/sharedRuntime.hpp" 41 #include "vmreg_x86.inline.hpp" 42 43 #if INCLUDE_ALL_GCS 44 #include "shenandoahBarrierSetAssembler_x86.hpp" 45 #endif 46 47 // These masks are used to provide 128-bit aligned bitmasks to the XMM 48 // instructions, to allow sign-masking or sign-bit flipping. They allow 49 // fast versions of NegF/NegD and AbsF/AbsD. 50 51 // Note: 'double' and 'long long' have 32-bits alignment on x86. 52 static jlong* double_quadword(jlong *adr, jlong lo, jlong hi) { 53 // Use the expression (adr)&(~0xF) to provide 128-bits aligned address 54 // of 128-bits operands for SSE instructions. 55 jlong *operand = (jlong*)(((intptr_t)adr) & ((intptr_t)(~0xF))); 56 // Store the value to a 128-bits operand. 57 operand[0] = lo; 58 operand[1] = hi; 59 return operand; 60 } 61 62 // Buffer for 128-bits masks used by SSE instructions. 63 static jlong fp_signmask_pool[(4+1)*2]; // 4*128bits(data) + 128bits(alignment) 64 65 // Static initialization during VM startup. 66 static jlong *float_signmask_pool = double_quadword(&fp_signmask_pool[1*2], CONST64(0x7FFFFFFF7FFFFFFF), CONST64(0x7FFFFFFF7FFFFFFF)); 67 static jlong *double_signmask_pool = double_quadword(&fp_signmask_pool[2*2], CONST64(0x7FFFFFFFFFFFFFFF), CONST64(0x7FFFFFFFFFFFFFFF)); 68 static jlong *float_signflip_pool = double_quadword(&fp_signmask_pool[3*2], CONST64(0x8000000080000000), CONST64(0x8000000080000000)); 69 static jlong *double_signflip_pool = double_quadword(&fp_signmask_pool[4*2], CONST64(0x8000000000000000), CONST64(0x8000000000000000)); 70 71 72 73 NEEDS_CLEANUP // remove this definitions ? 74 const Register IC_Klass = rax; // where the IC klass is cached 75 const Register SYNC_header = rax; // synchronization header 76 const Register SHIFT_count = rcx; // where count for shift operations must be 77 78 #define __ _masm-> 79 80 81 static void select_different_registers(Register preserve, 82 Register extra, 83 Register &tmp1, 84 Register &tmp2) { 85 if (tmp1 == preserve) { 86 assert_different_registers(tmp1, tmp2, extra); 87 tmp1 = extra; 88 } else if (tmp2 == preserve) { 89 assert_different_registers(tmp1, tmp2, extra); 90 tmp2 = extra; 91 } 92 assert_different_registers(preserve, tmp1, tmp2); 93 } 94 95 96 97 static void select_different_registers(Register preserve, 98 Register extra, 99 Register &tmp1, 100 Register &tmp2, 101 Register &tmp3) { 102 if (tmp1 == preserve) { 103 assert_different_registers(tmp1, tmp2, tmp3, extra); 104 tmp1 = extra; 105 } else if (tmp2 == preserve) { 106 assert_different_registers(tmp1, tmp2, tmp3, extra); 107 tmp2 = extra; 108 } else if (tmp3 == preserve) { 109 assert_different_registers(tmp1, tmp2, tmp3, extra); 110 tmp3 = extra; 111 } 112 assert_different_registers(preserve, tmp1, tmp2, tmp3); 113 } 114 115 116 117 bool LIR_Assembler::is_small_constant(LIR_Opr opr) { 118 if (opr->is_constant()) { 119 LIR_Const* constant = opr->as_constant_ptr(); 120 switch (constant->type()) { 121 case T_INT: { 122 return true; 123 } 124 125 default: 126 return false; 127 } 128 } 129 return false; 130 } 131 132 133 LIR_Opr LIR_Assembler::receiverOpr() { 134 return FrameMap::receiver_opr; 135 } 136 137 LIR_Opr LIR_Assembler::osrBufferPointer() { 138 return FrameMap::as_pointer_opr(receiverOpr()->as_register()); 139 } 140 141 //--------------fpu register translations----------------------- 142 143 144 address LIR_Assembler::float_constant(float f) { 145 address const_addr = __ float_constant(f); 146 if (const_addr == NULL) { 147 bailout("const section overflow"); 148 return __ code()->consts()->start(); 149 } else { 150 return const_addr; 151 } 152 } 153 154 155 address LIR_Assembler::double_constant(double d) { 156 address const_addr = __ double_constant(d); 157 if (const_addr == NULL) { 158 bailout("const section overflow"); 159 return __ code()->consts()->start(); 160 } else { 161 return const_addr; 162 } 163 } 164 165 166 void LIR_Assembler::set_24bit_FPU() { 167 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_24())); 168 } 169 170 void LIR_Assembler::reset_FPU() { 171 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); 172 } 173 174 void LIR_Assembler::fpop() { 175 __ fpop(); 176 } 177 178 void LIR_Assembler::fxch(int i) { 179 __ fxch(i); 180 } 181 182 void LIR_Assembler::fld(int i) { 183 __ fld_s(i); 184 } 185 186 void LIR_Assembler::ffree(int i) { 187 __ ffree(i); 188 } 189 190 void LIR_Assembler::breakpoint() { 191 __ int3(); 192 } 193 194 void LIR_Assembler::push(LIR_Opr opr) { 195 if (opr->is_single_cpu()) { 196 __ push_reg(opr->as_register()); 197 } else if (opr->is_double_cpu()) { 198 NOT_LP64(__ push_reg(opr->as_register_hi())); 199 __ push_reg(opr->as_register_lo()); 200 } else if (opr->is_stack()) { 201 __ push_addr(frame_map()->address_for_slot(opr->single_stack_ix())); 202 } else if (opr->is_constant()) { 203 LIR_Const* const_opr = opr->as_constant_ptr(); 204 if (const_opr->type() == T_OBJECT) { 205 __ push_oop(const_opr->as_jobject()); 206 } else if (const_opr->type() == T_INT) { 207 __ push_jint(const_opr->as_jint()); 208 } else { 209 ShouldNotReachHere(); 210 } 211 212 } else { 213 ShouldNotReachHere(); 214 } 215 } 216 217 void LIR_Assembler::pop(LIR_Opr opr) { 218 if (opr->is_single_cpu()) { 219 __ pop_reg(opr->as_register()); 220 } else { 221 ShouldNotReachHere(); 222 } 223 } 224 225 bool LIR_Assembler::is_literal_address(LIR_Address* addr) { 226 return addr->base()->is_illegal() && addr->index()->is_illegal(); 227 } 228 229 //------------------------------------------- 230 231 Address LIR_Assembler::as_Address(LIR_Address* addr) { 232 return as_Address(addr, rscratch1); 233 } 234 235 Address LIR_Assembler::as_Address(LIR_Address* addr, Register tmp) { 236 if (addr->base()->is_illegal()) { 237 assert(addr->index()->is_illegal(), "must be illegal too"); 238 AddressLiteral laddr((address)addr->disp(), relocInfo::none); 239 if (! __ reachable(laddr)) { 240 __ movptr(tmp, laddr.addr()); 241 Address res(tmp, 0); 242 return res; 243 } else { 244 return __ as_Address(laddr); 245 } 246 } 247 248 Register base = addr->base()->as_pointer_register(); 249 250 if (addr->index()->is_illegal()) { 251 return Address( base, addr->disp()); 252 } else if (addr->index()->is_cpu_register()) { 253 Register index = addr->index()->as_pointer_register(); 254 return Address(base, index, (Address::ScaleFactor) addr->scale(), addr->disp()); 255 } else if (addr->index()->is_constant()) { 256 intptr_t addr_offset = (addr->index()->as_constant_ptr()->as_jint() << addr->scale()) + addr->disp(); 257 assert(Assembler::is_simm32(addr_offset), "must be"); 258 259 return Address(base, addr_offset); 260 } else { 261 Unimplemented(); 262 return Address(); 263 } 264 } 265 266 267 Address LIR_Assembler::as_Address_hi(LIR_Address* addr) { 268 Address base = as_Address(addr); 269 return Address(base._base, base._index, base._scale, base._disp + BytesPerWord); 270 } 271 272 273 Address LIR_Assembler::as_Address_lo(LIR_Address* addr) { 274 return as_Address(addr); 275 } 276 277 278 void LIR_Assembler::osr_entry() { 279 offsets()->set_value(CodeOffsets::OSR_Entry, code_offset()); 280 BlockBegin* osr_entry = compilation()->hir()->osr_entry(); 281 ValueStack* entry_state = osr_entry->state(); 282 int number_of_locks = entry_state->locks_size(); 283 284 // we jump here if osr happens with the interpreter 285 // state set up to continue at the beginning of the 286 // loop that triggered osr - in particular, we have 287 // the following registers setup: 288 // 289 // rcx: osr buffer 290 // 291 292 // build frame 293 ciMethod* m = compilation()->method(); 294 __ build_frame(initial_frame_size_in_bytes(), bang_size_in_bytes()); 295 296 // OSR buffer is 297 // 298 // locals[nlocals-1..0] 299 // monitors[0..number_of_locks] 300 // 301 // locals is a direct copy of the interpreter frame so in the osr buffer 302 // so first slot in the local array is the last local from the interpreter 303 // and last slot is local[0] (receiver) from the interpreter 304 // 305 // Similarly with locks. The first lock slot in the osr buffer is the nth lock 306 // from the interpreter frame, the nth lock slot in the osr buffer is 0th lock 307 // in the interpreter frame (the method lock if a sync method) 308 309 // Initialize monitors in the compiled activation. 310 // rcx: pointer to osr buffer 311 // 312 // All other registers are dead at this point and the locals will be 313 // copied into place by code emitted in the IR. 314 315 Register OSR_buf = osrBufferPointer()->as_pointer_register(); 316 { assert(frame::interpreter_frame_monitor_size() == BasicObjectLock::size(), "adjust code below"); 317 int monitor_offset = BytesPerWord * method()->max_locals() + 318 (2 * BytesPerWord) * (number_of_locks - 1); 319 // SharedRuntime::OSR_migration_begin() packs BasicObjectLocks in 320 // the OSR buffer using 2 word entries: first the lock and then 321 // the oop. 322 for (int i = 0; i < number_of_locks; i++) { 323 int slot_offset = monitor_offset - ((i * 2) * BytesPerWord); 324 #ifdef ASSERT 325 // verify the interpreter's monitor has a non-null object 326 { 327 Label L; 328 __ cmpptr(Address(OSR_buf, slot_offset + 1*BytesPerWord), (int32_t)NULL_WORD); 329 __ jcc(Assembler::notZero, L); 330 __ stop("locked object is NULL"); 331 __ bind(L); 332 } 333 #endif 334 __ movptr(rbx, Address(OSR_buf, slot_offset + 0)); 335 __ movptr(frame_map()->address_for_monitor_lock(i), rbx); 336 __ movptr(rbx, Address(OSR_buf, slot_offset + 1*BytesPerWord)); 337 __ movptr(frame_map()->address_for_monitor_object(i), rbx); 338 } 339 } 340 } 341 342 343 // inline cache check; done before the frame is built. 344 int LIR_Assembler::check_icache() { 345 Register receiver = FrameMap::receiver_opr->as_register(); 346 Register ic_klass = IC_Klass; 347 const int ic_cmp_size = LP64_ONLY(10) NOT_LP64(9); 348 const bool do_post_padding = VerifyOops || UseCompressedClassPointers; 349 if (!do_post_padding) { 350 // insert some nops so that the verified entry point is aligned on CodeEntryAlignment 351 while ((__ offset() + ic_cmp_size) % CodeEntryAlignment != 0) { 352 __ nop(); 353 } 354 } 355 int offset = __ offset(); 356 __ inline_cache_check(receiver, IC_Klass); 357 assert(__ offset() % CodeEntryAlignment == 0 || do_post_padding, "alignment must be correct"); 358 if (do_post_padding) { 359 // force alignment after the cache check. 360 // It's been verified to be aligned if !VerifyOops 361 __ align(CodeEntryAlignment); 362 } 363 return offset; 364 } 365 366 367 void LIR_Assembler::jobject2reg_with_patching(Register reg, CodeEmitInfo* info) { 368 jobject o = NULL; 369 PatchingStub* patch = new PatchingStub(_masm, patching_id(info)); 370 __ movoop(reg, o); 371 patching_epilog(patch, lir_patch_normal, reg, info); 372 } 373 374 void LIR_Assembler::klass2reg_with_patching(Register reg, CodeEmitInfo* info) { 375 Metadata* o = NULL; 376 PatchingStub* patch = new PatchingStub(_masm, PatchingStub::load_klass_id); 377 __ mov_metadata(reg, o); 378 patching_epilog(patch, lir_patch_normal, reg, info); 379 } 380 381 // This specifies the rsp decrement needed to build the frame 382 int LIR_Assembler::initial_frame_size_in_bytes() const { 383 // if rounding, must let FrameMap know! 384 385 // The frame_map records size in slots (32bit word) 386 387 // subtract two words to account for return address and link 388 return (frame_map()->framesize() - (2*VMRegImpl::slots_per_word)) * VMRegImpl::stack_slot_size; 389 } 390 391 392 int LIR_Assembler::emit_exception_handler() { 393 // if the last instruction is a call (typically to do a throw which 394 // is coming at the end after block reordering) the return address 395 // must still point into the code area in order to avoid assertion 396 // failures when searching for the corresponding bci => add a nop 397 // (was bug 5/14/1999 - gri) 398 __ nop(); 399 400 // generate code for exception handler 401 address handler_base = __ start_a_stub(exception_handler_size); 402 if (handler_base == NULL) { 403 // not enough space left for the handler 404 bailout("exception handler overflow"); 405 return -1; 406 } 407 408 int offset = code_offset(); 409 410 // the exception oop and pc are in rax, and rdx 411 // no other registers need to be preserved, so invalidate them 412 __ invalidate_registers(false, true, true, false, true, true); 413 414 // check that there is really an exception 415 __ verify_not_null_oop(rax); 416 417 // search an exception handler (rax: exception oop, rdx: throwing pc) 418 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::handle_exception_from_callee_id))); 419 __ should_not_reach_here(); 420 guarantee(code_offset() - offset <= exception_handler_size, "overflow"); 421 __ end_a_stub(); 422 423 return offset; 424 } 425 426 427 // Emit the code to remove the frame from the stack in the exception 428 // unwind path. 429 int LIR_Assembler::emit_unwind_handler() { 430 #ifndef PRODUCT 431 if (CommentedAssembly) { 432 _masm->block_comment("Unwind handler"); 433 } 434 #endif 435 436 int offset = code_offset(); 437 438 // Fetch the exception from TLS and clear out exception related thread state 439 Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread); 440 NOT_LP64(__ get_thread(rsi)); 441 __ movptr(rax, Address(thread, JavaThread::exception_oop_offset())); 442 __ movptr(Address(thread, JavaThread::exception_oop_offset()), (intptr_t)NULL_WORD); 443 __ movptr(Address(thread, JavaThread::exception_pc_offset()), (intptr_t)NULL_WORD); 444 445 __ bind(_unwind_handler_entry); 446 __ verify_not_null_oop(rax); 447 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) { 448 __ mov(rbx, rax); // Preserve the exception (rbx is always callee-saved) 449 } 450 451 // Preform needed unlocking 452 MonitorExitStub* stub = NULL; 453 if (method()->is_synchronized()) { 454 monitor_address(0, FrameMap::rax_opr); 455 stub = new MonitorExitStub(FrameMap::rax_opr, true, 0); 456 __ unlock_object(rdi, rsi, rax, *stub->entry()); 457 __ bind(*stub->continuation()); 458 } 459 460 if (compilation()->env()->dtrace_method_probes()) { 461 #ifdef _LP64 462 __ mov(rdi, r15_thread); 463 __ mov_metadata(rsi, method()->constant_encoding()); 464 #else 465 __ get_thread(rax); 466 __ movptr(Address(rsp, 0), rax); 467 __ mov_metadata(Address(rsp, sizeof(void*)), method()->constant_encoding()); 468 #endif 469 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit))); 470 } 471 472 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) { 473 __ mov(rax, rbx); // Restore the exception 474 } 475 476 // remove the activation and dispatch to the unwind handler 477 __ remove_frame(initial_frame_size_in_bytes()); 478 __ jump(RuntimeAddress(Runtime1::entry_for(Runtime1::unwind_exception_id))); 479 480 // Emit the slow path assembly 481 if (stub != NULL) { 482 stub->emit_code(this); 483 } 484 485 return offset; 486 } 487 488 489 int LIR_Assembler::emit_deopt_handler() { 490 // if the last instruction is a call (typically to do a throw which 491 // is coming at the end after block reordering) the return address 492 // must still point into the code area in order to avoid assertion 493 // failures when searching for the corresponding bci => add a nop 494 // (was bug 5/14/1999 - gri) 495 __ nop(); 496 497 // generate code for exception handler 498 address handler_base = __ start_a_stub(deopt_handler_size); 499 if (handler_base == NULL) { 500 // not enough space left for the handler 501 bailout("deopt handler overflow"); 502 return -1; 503 } 504 505 int offset = code_offset(); 506 InternalAddress here(__ pc()); 507 508 __ pushptr(here.addr()); 509 __ jump(RuntimeAddress(SharedRuntime::deopt_blob()->unpack())); 510 guarantee(code_offset() - offset <= deopt_handler_size, "overflow"); 511 __ end_a_stub(); 512 513 return offset; 514 } 515 516 517 // This is the fast version of java.lang.String.compare; it has not 518 // OSR-entry and therefore, we generate a slow version for OSR's 519 void LIR_Assembler::emit_string_compare(LIR_Opr arg0, LIR_Opr arg1, LIR_Opr dst, CodeEmitInfo* info) { 520 __ movptr (rbx, rcx); // receiver is in rcx 521 __ movptr (rax, arg1->as_register()); 522 523 // Get addresses of first characters from both Strings 524 __ load_heap_oop(rsi, Address(rax, java_lang_String::value_offset_in_bytes())); 525 if (java_lang_String::has_offset_field()) { 526 __ movptr (rcx, Address(rax, java_lang_String::offset_offset_in_bytes())); 527 __ movl (rax, Address(rax, java_lang_String::count_offset_in_bytes())); 528 __ lea (rsi, Address(rsi, rcx, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR))); 529 } else { 530 __ movl (rax, Address(rsi, arrayOopDesc::length_offset_in_bytes())); 531 __ lea (rsi, Address(rsi, arrayOopDesc::base_offset_in_bytes(T_CHAR))); 532 } 533 534 // rbx, may be NULL 535 add_debug_info_for_null_check_here(info); 536 __ load_heap_oop(rdi, Address(rbx, java_lang_String::value_offset_in_bytes())); 537 if (java_lang_String::has_offset_field()) { 538 __ movptr (rcx, Address(rbx, java_lang_String::offset_offset_in_bytes())); 539 __ movl (rbx, Address(rbx, java_lang_String::count_offset_in_bytes())); 540 __ lea (rdi, Address(rdi, rcx, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR))); 541 } else { 542 __ movl (rbx, Address(rdi, arrayOopDesc::length_offset_in_bytes())); 543 __ lea (rdi, Address(rdi, arrayOopDesc::base_offset_in_bytes(T_CHAR))); 544 } 545 546 // compute minimum length (in rax) and difference of lengths (on top of stack) 547 __ mov (rcx, rbx); 548 __ subptr(rbx, rax); // subtract lengths 549 __ push (rbx); // result 550 __ cmov (Assembler::lessEqual, rax, rcx); 551 552 // is minimum length 0? 553 Label noLoop, haveResult; 554 __ testptr (rax, rax); 555 __ jcc (Assembler::zero, noLoop); 556 557 // compare first characters 558 __ load_unsigned_short(rcx, Address(rdi, 0)); 559 __ load_unsigned_short(rbx, Address(rsi, 0)); 560 __ subl(rcx, rbx); 561 __ jcc(Assembler::notZero, haveResult); 562 // starting loop 563 __ decrement(rax); // we already tested index: skip one 564 __ jcc(Assembler::zero, noLoop); 565 566 // set rsi.edi to the end of the arrays (arrays have same length) 567 // negate the index 568 569 __ lea(rsi, Address(rsi, rax, Address::times_2, type2aelembytes(T_CHAR))); 570 __ lea(rdi, Address(rdi, rax, Address::times_2, type2aelembytes(T_CHAR))); 571 __ negptr(rax); 572 573 // compare the strings in a loop 574 575 Label loop; 576 __ align(wordSize); 577 __ bind(loop); 578 __ load_unsigned_short(rcx, Address(rdi, rax, Address::times_2, 0)); 579 __ load_unsigned_short(rbx, Address(rsi, rax, Address::times_2, 0)); 580 __ subl(rcx, rbx); 581 __ jcc(Assembler::notZero, haveResult); 582 __ increment(rax); 583 __ jcc(Assembler::notZero, loop); 584 585 // strings are equal up to min length 586 587 __ bind(noLoop); 588 __ pop(rax); 589 return_op(LIR_OprFact::illegalOpr); 590 591 __ bind(haveResult); 592 // leave instruction is going to discard the TOS value 593 __ mov (rax, rcx); // result of call is in rax, 594 } 595 596 597 void LIR_Assembler::return_op(LIR_Opr result) { 598 assert(result->is_illegal() || !result->is_single_cpu() || result->as_register() == rax, "word returns are in rax,"); 599 if (!result->is_illegal() && result->is_float_kind() && !result->is_xmm_register()) { 600 assert(result->fpu() == 0, "result must already be on TOS"); 601 } 602 603 // Pop the stack before the safepoint code 604 __ remove_frame(initial_frame_size_in_bytes()); 605 606 bool result_is_oop = result->is_valid() ? result->is_oop() : false; 607 608 // Note: we do not need to round double result; float result has the right precision 609 // the poll sets the condition code, but no data registers 610 AddressLiteral polling_page(os::get_polling_page() + (SafepointPollOffset % os::vm_page_size()), 611 relocInfo::poll_return_type); 612 613 if (Assembler::is_polling_page_far()) { 614 __ lea(rscratch1, polling_page); 615 __ relocate(relocInfo::poll_return_type); 616 __ testl(rax, Address(rscratch1, 0)); 617 } else { 618 __ testl(rax, polling_page); 619 } 620 __ ret(0); 621 } 622 623 624 int LIR_Assembler::safepoint_poll(LIR_Opr tmp, CodeEmitInfo* info) { 625 AddressLiteral polling_page(os::get_polling_page() + (SafepointPollOffset % os::vm_page_size()), 626 relocInfo::poll_type); 627 guarantee(info != NULL, "Shouldn't be NULL"); 628 int offset = __ offset(); 629 if (Assembler::is_polling_page_far()) { 630 __ lea(rscratch1, polling_page); 631 offset = __ offset(); 632 add_debug_info_for_branch(info); 633 __ testl(rax, Address(rscratch1, 0)); 634 } else { 635 add_debug_info_for_branch(info); 636 __ testl(rax, polling_page); 637 } 638 return offset; 639 } 640 641 642 void LIR_Assembler::move_regs(Register from_reg, Register to_reg) { 643 if (from_reg != to_reg) __ mov(to_reg, from_reg); 644 } 645 646 void LIR_Assembler::swap_reg(Register a, Register b) { 647 __ xchgptr(a, b); 648 } 649 650 651 void LIR_Assembler::const2reg(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) { 652 assert(src->is_constant(), "should not call otherwise"); 653 assert(dest->is_register(), "should not call otherwise"); 654 LIR_Const* c = src->as_constant_ptr(); 655 656 switch (c->type()) { 657 case T_INT: { 658 assert(patch_code == lir_patch_none, "no patching handled here"); 659 __ movl(dest->as_register(), c->as_jint()); 660 break; 661 } 662 663 case T_ADDRESS: { 664 assert(patch_code == lir_patch_none, "no patching handled here"); 665 __ movptr(dest->as_register(), c->as_jint()); 666 break; 667 } 668 669 case T_LONG: { 670 assert(patch_code == lir_patch_none, "no patching handled here"); 671 #ifdef _LP64 672 __ movptr(dest->as_register_lo(), (intptr_t)c->as_jlong()); 673 #else 674 __ movptr(dest->as_register_lo(), c->as_jint_lo()); 675 __ movptr(dest->as_register_hi(), c->as_jint_hi()); 676 #endif // _LP64 677 break; 678 } 679 680 case T_OBJECT: { 681 if (patch_code != lir_patch_none) { 682 jobject2reg_with_patching(dest->as_register(), info); 683 } else { 684 __ movoop(dest->as_register(), c->as_jobject()); 685 } 686 break; 687 } 688 689 case T_METADATA: { 690 if (patch_code != lir_patch_none) { 691 klass2reg_with_patching(dest->as_register(), info); 692 } else { 693 __ mov_metadata(dest->as_register(), c->as_metadata()); 694 } 695 break; 696 } 697 698 case T_FLOAT: { 699 if (dest->is_single_xmm()) { 700 if (c->is_zero_float()) { 701 __ xorps(dest->as_xmm_float_reg(), dest->as_xmm_float_reg()); 702 } else { 703 __ movflt(dest->as_xmm_float_reg(), 704 InternalAddress(float_constant(c->as_jfloat()))); 705 } 706 } else { 707 assert(dest->is_single_fpu(), "must be"); 708 assert(dest->fpu_regnr() == 0, "dest must be TOS"); 709 if (c->is_zero_float()) { 710 __ fldz(); 711 } else if (c->is_one_float()) { 712 __ fld1(); 713 } else { 714 __ fld_s (InternalAddress(float_constant(c->as_jfloat()))); 715 } 716 } 717 break; 718 } 719 720 case T_DOUBLE: { 721 if (dest->is_double_xmm()) { 722 if (c->is_zero_double()) { 723 __ xorpd(dest->as_xmm_double_reg(), dest->as_xmm_double_reg()); 724 } else { 725 __ movdbl(dest->as_xmm_double_reg(), 726 InternalAddress(double_constant(c->as_jdouble()))); 727 } 728 } else { 729 assert(dest->is_double_fpu(), "must be"); 730 assert(dest->fpu_regnrLo() == 0, "dest must be TOS"); 731 if (c->is_zero_double()) { 732 __ fldz(); 733 } else if (c->is_one_double()) { 734 __ fld1(); 735 } else { 736 __ fld_d (InternalAddress(double_constant(c->as_jdouble()))); 737 } 738 } 739 break; 740 } 741 742 default: 743 ShouldNotReachHere(); 744 } 745 } 746 747 void LIR_Assembler::const2stack(LIR_Opr src, LIR_Opr dest) { 748 assert(src->is_constant(), "should not call otherwise"); 749 assert(dest->is_stack(), "should not call otherwise"); 750 LIR_Const* c = src->as_constant_ptr(); 751 752 switch (c->type()) { 753 case T_INT: // fall through 754 case T_FLOAT: 755 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits()); 756 break; 757 758 case T_ADDRESS: 759 __ movptr(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jint_bits()); 760 break; 761 762 case T_OBJECT: 763 __ movoop(frame_map()->address_for_slot(dest->single_stack_ix()), c->as_jobject()); 764 break; 765 766 case T_LONG: // fall through 767 case T_DOUBLE: 768 #ifdef _LP64 769 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(), 770 lo_word_offset_in_bytes), (intptr_t)c->as_jlong_bits()); 771 #else 772 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(), 773 lo_word_offset_in_bytes), c->as_jint_lo_bits()); 774 __ movptr(frame_map()->address_for_slot(dest->double_stack_ix(), 775 hi_word_offset_in_bytes), c->as_jint_hi_bits()); 776 #endif // _LP64 777 break; 778 779 default: 780 ShouldNotReachHere(); 781 } 782 } 783 784 void LIR_Assembler::const2mem(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info, bool wide) { 785 assert(src->is_constant(), "should not call otherwise"); 786 assert(dest->is_address(), "should not call otherwise"); 787 LIR_Const* c = src->as_constant_ptr(); 788 LIR_Address* addr = dest->as_address_ptr(); 789 790 int null_check_here = code_offset(); 791 switch (type) { 792 case T_INT: // fall through 793 case T_FLOAT: 794 __ movl(as_Address(addr), c->as_jint_bits()); 795 break; 796 797 case T_ADDRESS: 798 __ movptr(as_Address(addr), c->as_jint_bits()); 799 break; 800 801 case T_OBJECT: // fall through 802 case T_ARRAY: 803 if (c->as_jobject() == NULL) { 804 if (UseCompressedOops && !wide) { 805 __ movl(as_Address(addr), (int32_t)NULL_WORD); 806 } else { 807 #ifdef _LP64 808 __ xorptr(rscratch1, rscratch1); 809 null_check_here = code_offset(); 810 __ movptr(as_Address(addr), rscratch1); 811 #else 812 __ movptr(as_Address(addr), NULL_WORD); 813 #endif 814 } 815 } else { 816 if (is_literal_address(addr)) { 817 ShouldNotReachHere(); 818 __ movoop(as_Address(addr, noreg), c->as_jobject()); 819 } else { 820 #ifdef _LP64 821 __ movoop(rscratch1, c->as_jobject()); 822 if (UseCompressedOops && !wide) { 823 __ encode_heap_oop(rscratch1); 824 null_check_here = code_offset(); 825 __ movl(as_Address_lo(addr), rscratch1); 826 } else { 827 null_check_here = code_offset(); 828 __ movptr(as_Address_lo(addr), rscratch1); 829 } 830 #else 831 __ movoop(as_Address(addr), c->as_jobject()); 832 #endif 833 } 834 } 835 break; 836 837 case T_LONG: // fall through 838 case T_DOUBLE: 839 #ifdef _LP64 840 if (is_literal_address(addr)) { 841 ShouldNotReachHere(); 842 __ movptr(as_Address(addr, r15_thread), (intptr_t)c->as_jlong_bits()); 843 } else { 844 __ movptr(r10, (intptr_t)c->as_jlong_bits()); 845 null_check_here = code_offset(); 846 __ movptr(as_Address_lo(addr), r10); 847 } 848 #else 849 // Always reachable in 32bit so this doesn't produce useless move literal 850 __ movptr(as_Address_hi(addr), c->as_jint_hi_bits()); 851 __ movptr(as_Address_lo(addr), c->as_jint_lo_bits()); 852 #endif // _LP64 853 break; 854 855 case T_BOOLEAN: // fall through 856 case T_BYTE: 857 __ movb(as_Address(addr), c->as_jint() & 0xFF); 858 break; 859 860 case T_CHAR: // fall through 861 case T_SHORT: 862 __ movw(as_Address(addr), c->as_jint() & 0xFFFF); 863 break; 864 865 default: 866 ShouldNotReachHere(); 867 }; 868 869 if (info != NULL) { 870 add_debug_info_for_null_check(null_check_here, info); 871 } 872 } 873 874 875 void LIR_Assembler::reg2reg(LIR_Opr src, LIR_Opr dest) { 876 assert(src->is_register(), "should not call otherwise"); 877 assert(dest->is_register(), "should not call otherwise"); 878 879 // move between cpu-registers 880 if (dest->is_single_cpu()) { 881 #ifdef _LP64 882 if (src->type() == T_LONG) { 883 // Can do LONG -> OBJECT 884 move_regs(src->as_register_lo(), dest->as_register()); 885 return; 886 } 887 #endif 888 assert(src->is_single_cpu(), "must match"); 889 if (src->type() == T_OBJECT) { 890 __ verify_oop(src->as_register()); 891 } 892 move_regs(src->as_register(), dest->as_register()); 893 894 } else if (dest->is_double_cpu()) { 895 #ifdef _LP64 896 if (src->type() == T_OBJECT || src->type() == T_ARRAY) { 897 // Surprising to me but we can see move of a long to t_object 898 __ verify_oop(src->as_register()); 899 move_regs(src->as_register(), dest->as_register_lo()); 900 return; 901 } 902 #endif 903 assert(src->is_double_cpu(), "must match"); 904 Register f_lo = src->as_register_lo(); 905 Register f_hi = src->as_register_hi(); 906 Register t_lo = dest->as_register_lo(); 907 Register t_hi = dest->as_register_hi(); 908 #ifdef _LP64 909 assert(f_hi == f_lo, "must be same"); 910 assert(t_hi == t_lo, "must be same"); 911 move_regs(f_lo, t_lo); 912 #else 913 assert(f_lo != f_hi && t_lo != t_hi, "invalid register allocation"); 914 915 916 if (f_lo == t_hi && f_hi == t_lo) { 917 swap_reg(f_lo, f_hi); 918 } else if (f_hi == t_lo) { 919 assert(f_lo != t_hi, "overwriting register"); 920 move_regs(f_hi, t_hi); 921 move_regs(f_lo, t_lo); 922 } else { 923 assert(f_hi != t_lo, "overwriting register"); 924 move_regs(f_lo, t_lo); 925 move_regs(f_hi, t_hi); 926 } 927 #endif // LP64 928 929 // special moves from fpu-register to xmm-register 930 // necessary for method results 931 } else if (src->is_single_xmm() && !dest->is_single_xmm()) { 932 __ movflt(Address(rsp, 0), src->as_xmm_float_reg()); 933 __ fld_s(Address(rsp, 0)); 934 } else if (src->is_double_xmm() && !dest->is_double_xmm()) { 935 __ movdbl(Address(rsp, 0), src->as_xmm_double_reg()); 936 __ fld_d(Address(rsp, 0)); 937 } else if (dest->is_single_xmm() && !src->is_single_xmm()) { 938 __ fstp_s(Address(rsp, 0)); 939 __ movflt(dest->as_xmm_float_reg(), Address(rsp, 0)); 940 } else if (dest->is_double_xmm() && !src->is_double_xmm()) { 941 __ fstp_d(Address(rsp, 0)); 942 __ movdbl(dest->as_xmm_double_reg(), Address(rsp, 0)); 943 944 // move between xmm-registers 945 } else if (dest->is_single_xmm()) { 946 assert(src->is_single_xmm(), "must match"); 947 __ movflt(dest->as_xmm_float_reg(), src->as_xmm_float_reg()); 948 } else if (dest->is_double_xmm()) { 949 assert(src->is_double_xmm(), "must match"); 950 __ movdbl(dest->as_xmm_double_reg(), src->as_xmm_double_reg()); 951 952 // move between fpu-registers (no instruction necessary because of fpu-stack) 953 } else if (dest->is_single_fpu() || dest->is_double_fpu()) { 954 assert(src->is_single_fpu() || src->is_double_fpu(), "must match"); 955 assert(src->fpu() == dest->fpu(), "currently should be nothing to do"); 956 } else { 957 ShouldNotReachHere(); 958 } 959 } 960 961 void LIR_Assembler::reg2stack(LIR_Opr src, LIR_Opr dest, BasicType type, bool pop_fpu_stack) { 962 assert(src->is_register(), "should not call otherwise"); 963 assert(dest->is_stack(), "should not call otherwise"); 964 965 if (src->is_single_cpu()) { 966 Address dst = frame_map()->address_for_slot(dest->single_stack_ix()); 967 if (type == T_OBJECT || type == T_ARRAY) { 968 __ verify_oop(src->as_register()); 969 __ movptr (dst, src->as_register()); 970 } else if (type == T_METADATA) { 971 __ movptr (dst, src->as_register()); 972 } else { 973 __ movl (dst, src->as_register()); 974 } 975 976 } else if (src->is_double_cpu()) { 977 Address dstLO = frame_map()->address_for_slot(dest->double_stack_ix(), lo_word_offset_in_bytes); 978 Address dstHI = frame_map()->address_for_slot(dest->double_stack_ix(), hi_word_offset_in_bytes); 979 __ movptr (dstLO, src->as_register_lo()); 980 NOT_LP64(__ movptr (dstHI, src->as_register_hi())); 981 982 } else if (src->is_single_xmm()) { 983 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix()); 984 __ movflt(dst_addr, src->as_xmm_float_reg()); 985 986 } else if (src->is_double_xmm()) { 987 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix()); 988 __ movdbl(dst_addr, src->as_xmm_double_reg()); 989 990 } else if (src->is_single_fpu()) { 991 assert(src->fpu_regnr() == 0, "argument must be on TOS"); 992 Address dst_addr = frame_map()->address_for_slot(dest->single_stack_ix()); 993 if (pop_fpu_stack) __ fstp_s (dst_addr); 994 else __ fst_s (dst_addr); 995 996 } else if (src->is_double_fpu()) { 997 assert(src->fpu_regnrLo() == 0, "argument must be on TOS"); 998 Address dst_addr = frame_map()->address_for_slot(dest->double_stack_ix()); 999 if (pop_fpu_stack) __ fstp_d (dst_addr); 1000 else __ fst_d (dst_addr); 1001 1002 } else { 1003 ShouldNotReachHere(); 1004 } 1005 } 1006 1007 1008 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 */) { 1009 LIR_Address* to_addr = dest->as_address_ptr(); 1010 PatchingStub* patch = NULL; 1011 Register compressed_src = rscratch1; 1012 1013 if (type == T_ARRAY || type == T_OBJECT) { 1014 __ verify_oop(src->as_register()); 1015 #ifdef _LP64 1016 if (UseCompressedOops && !wide) { 1017 __ movptr(compressed_src, src->as_register()); 1018 __ encode_heap_oop(compressed_src); 1019 if (patch_code != lir_patch_none) { 1020 info->oop_map()->set_narrowoop(compressed_src->as_VMReg()); 1021 } 1022 } 1023 #endif 1024 } 1025 1026 if (patch_code != lir_patch_none) { 1027 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1028 Address toa = as_Address(to_addr); 1029 assert(toa.disp() != 0, "must have"); 1030 } 1031 1032 int null_check_here = code_offset(); 1033 switch (type) { 1034 case T_FLOAT: { 1035 if (src->is_single_xmm()) { 1036 __ movflt(as_Address(to_addr), src->as_xmm_float_reg()); 1037 } else { 1038 assert(src->is_single_fpu(), "must be"); 1039 assert(src->fpu_regnr() == 0, "argument must be on TOS"); 1040 if (pop_fpu_stack) __ fstp_s(as_Address(to_addr)); 1041 else __ fst_s (as_Address(to_addr)); 1042 } 1043 break; 1044 } 1045 1046 case T_DOUBLE: { 1047 if (src->is_double_xmm()) { 1048 __ movdbl(as_Address(to_addr), src->as_xmm_double_reg()); 1049 } else { 1050 assert(src->is_double_fpu(), "must be"); 1051 assert(src->fpu_regnrLo() == 0, "argument must be on TOS"); 1052 if (pop_fpu_stack) __ fstp_d(as_Address(to_addr)); 1053 else __ fst_d (as_Address(to_addr)); 1054 } 1055 break; 1056 } 1057 1058 case T_ARRAY: // fall through 1059 case T_OBJECT: // fall through 1060 if (UseCompressedOops && !wide) { 1061 __ movl(as_Address(to_addr), compressed_src); 1062 } else { 1063 __ movptr(as_Address(to_addr), src->as_register()); 1064 } 1065 break; 1066 case T_METADATA: 1067 // We get here to store a method pointer to the stack to pass to 1068 // a dtrace runtime call. This can't work on 64 bit with 1069 // compressed klass ptrs: T_METADATA can be a compressed klass 1070 // ptr or a 64 bit method pointer. 1071 LP64_ONLY(ShouldNotReachHere()); 1072 __ movptr(as_Address(to_addr), src->as_register()); 1073 break; 1074 case T_ADDRESS: 1075 __ movptr(as_Address(to_addr), src->as_register()); 1076 break; 1077 case T_INT: 1078 __ movl(as_Address(to_addr), src->as_register()); 1079 break; 1080 1081 case T_LONG: { 1082 Register from_lo = src->as_register_lo(); 1083 Register from_hi = src->as_register_hi(); 1084 #ifdef _LP64 1085 __ movptr(as_Address_lo(to_addr), from_lo); 1086 #else 1087 Register base = to_addr->base()->as_register(); 1088 Register index = noreg; 1089 if (to_addr->index()->is_register()) { 1090 index = to_addr->index()->as_register(); 1091 } 1092 if (base == from_lo || index == from_lo) { 1093 assert(base != from_hi, "can't be"); 1094 assert(index == noreg || (index != base && index != from_hi), "can't handle this"); 1095 __ movl(as_Address_hi(to_addr), from_hi); 1096 if (patch != NULL) { 1097 patching_epilog(patch, lir_patch_high, base, info); 1098 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1099 patch_code = lir_patch_low; 1100 } 1101 __ movl(as_Address_lo(to_addr), from_lo); 1102 } else { 1103 assert(index == noreg || (index != base && index != from_lo), "can't handle this"); 1104 __ movl(as_Address_lo(to_addr), from_lo); 1105 if (patch != NULL) { 1106 patching_epilog(patch, lir_patch_low, base, info); 1107 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1108 patch_code = lir_patch_high; 1109 } 1110 __ movl(as_Address_hi(to_addr), from_hi); 1111 } 1112 #endif // _LP64 1113 break; 1114 } 1115 1116 case T_BYTE: // fall through 1117 case T_BOOLEAN: { 1118 Register src_reg = src->as_register(); 1119 Address dst_addr = as_Address(to_addr); 1120 assert(VM_Version::is_P6() || src_reg->has_byte_register(), "must use byte registers if not P6"); 1121 __ movb(dst_addr, src_reg); 1122 break; 1123 } 1124 1125 case T_CHAR: // fall through 1126 case T_SHORT: 1127 __ movw(as_Address(to_addr), src->as_register()); 1128 break; 1129 1130 default: 1131 ShouldNotReachHere(); 1132 } 1133 if (info != NULL) { 1134 add_debug_info_for_null_check(null_check_here, info); 1135 } 1136 1137 if (patch_code != lir_patch_none) { 1138 patching_epilog(patch, patch_code, to_addr->base()->as_register(), info); 1139 } 1140 } 1141 1142 1143 void LIR_Assembler::stack2reg(LIR_Opr src, LIR_Opr dest, BasicType type) { 1144 assert(src->is_stack(), "should not call otherwise"); 1145 assert(dest->is_register(), "should not call otherwise"); 1146 1147 if (dest->is_single_cpu()) { 1148 if (type == T_ARRAY || type == T_OBJECT) { 1149 __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix())); 1150 __ verify_oop(dest->as_register()); 1151 } else if (type == T_METADATA) { 1152 __ movptr(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix())); 1153 } else { 1154 __ movl(dest->as_register(), frame_map()->address_for_slot(src->single_stack_ix())); 1155 } 1156 1157 } else if (dest->is_double_cpu()) { 1158 Address src_addr_LO = frame_map()->address_for_slot(src->double_stack_ix(), lo_word_offset_in_bytes); 1159 Address src_addr_HI = frame_map()->address_for_slot(src->double_stack_ix(), hi_word_offset_in_bytes); 1160 __ movptr(dest->as_register_lo(), src_addr_LO); 1161 NOT_LP64(__ movptr(dest->as_register_hi(), src_addr_HI)); 1162 1163 } else if (dest->is_single_xmm()) { 1164 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix()); 1165 __ movflt(dest->as_xmm_float_reg(), src_addr); 1166 1167 } else if (dest->is_double_xmm()) { 1168 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix()); 1169 __ movdbl(dest->as_xmm_double_reg(), src_addr); 1170 1171 } else if (dest->is_single_fpu()) { 1172 assert(dest->fpu_regnr() == 0, "dest must be TOS"); 1173 Address src_addr = frame_map()->address_for_slot(src->single_stack_ix()); 1174 __ fld_s(src_addr); 1175 1176 } else if (dest->is_double_fpu()) { 1177 assert(dest->fpu_regnrLo() == 0, "dest must be TOS"); 1178 Address src_addr = frame_map()->address_for_slot(src->double_stack_ix()); 1179 __ fld_d(src_addr); 1180 1181 } else { 1182 ShouldNotReachHere(); 1183 } 1184 } 1185 1186 1187 void LIR_Assembler::stack2stack(LIR_Opr src, LIR_Opr dest, BasicType type) { 1188 if (src->is_single_stack()) { 1189 if (type == T_OBJECT || type == T_ARRAY) { 1190 __ pushptr(frame_map()->address_for_slot(src ->single_stack_ix())); 1191 __ popptr (frame_map()->address_for_slot(dest->single_stack_ix())); 1192 } else { 1193 #ifndef _LP64 1194 __ pushl(frame_map()->address_for_slot(src ->single_stack_ix())); 1195 __ popl (frame_map()->address_for_slot(dest->single_stack_ix())); 1196 #else 1197 //no pushl on 64bits 1198 __ movl(rscratch1, frame_map()->address_for_slot(src ->single_stack_ix())); 1199 __ movl(frame_map()->address_for_slot(dest->single_stack_ix()), rscratch1); 1200 #endif 1201 } 1202 1203 } else if (src->is_double_stack()) { 1204 #ifdef _LP64 1205 __ pushptr(frame_map()->address_for_slot(src ->double_stack_ix())); 1206 __ popptr (frame_map()->address_for_slot(dest->double_stack_ix())); 1207 #else 1208 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 0)); 1209 // push and pop the part at src + wordSize, adding wordSize for the previous push 1210 __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 2 * wordSize)); 1211 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 2 * wordSize)); 1212 __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 0)); 1213 #endif // _LP64 1214 1215 } else { 1216 ShouldNotReachHere(); 1217 } 1218 } 1219 1220 1221 void LIR_Assembler::mem2reg(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool wide, bool /* unaligned */) { 1222 assert(src->is_address(), "should not call otherwise"); 1223 assert(dest->is_register(), "should not call otherwise"); 1224 1225 LIR_Address* addr = src->as_address_ptr(); 1226 Address from_addr = as_Address(addr); 1227 1228 if (addr->base()->type() == T_OBJECT) { 1229 __ verify_oop(addr->base()->as_pointer_register()); 1230 } 1231 1232 switch (type) { 1233 case T_BOOLEAN: // fall through 1234 case T_BYTE: // fall through 1235 case T_CHAR: // fall through 1236 case T_SHORT: 1237 if (!VM_Version::is_P6() && !from_addr.uses(dest->as_register())) { 1238 // on pre P6 processors we may get partial register stalls 1239 // so blow away the value of to_rinfo before loading a 1240 // partial word into it. Do it here so that it precedes 1241 // the potential patch point below. 1242 __ xorptr(dest->as_register(), dest->as_register()); 1243 } 1244 break; 1245 } 1246 1247 PatchingStub* patch = NULL; 1248 if (patch_code != lir_patch_none) { 1249 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1250 assert(from_addr.disp() != 0, "must have"); 1251 } 1252 if (info != NULL) { 1253 add_debug_info_for_null_check_here(info); 1254 } 1255 1256 switch (type) { 1257 case T_FLOAT: { 1258 if (dest->is_single_xmm()) { 1259 __ movflt(dest->as_xmm_float_reg(), from_addr); 1260 } else { 1261 assert(dest->is_single_fpu(), "must be"); 1262 assert(dest->fpu_regnr() == 0, "dest must be TOS"); 1263 __ fld_s(from_addr); 1264 } 1265 break; 1266 } 1267 1268 case T_DOUBLE: { 1269 if (dest->is_double_xmm()) { 1270 __ movdbl(dest->as_xmm_double_reg(), from_addr); 1271 } else { 1272 assert(dest->is_double_fpu(), "must be"); 1273 assert(dest->fpu_regnrLo() == 0, "dest must be TOS"); 1274 __ fld_d(from_addr); 1275 } 1276 break; 1277 } 1278 1279 case T_OBJECT: // fall through 1280 case T_ARRAY: // fall through 1281 if (UseCompressedOops && !wide) { 1282 __ movl(dest->as_register(), from_addr); 1283 } else { 1284 __ movptr(dest->as_register(), from_addr); 1285 } 1286 break; 1287 1288 case T_ADDRESS: 1289 if (UseCompressedClassPointers && addr->disp() == oopDesc::klass_offset_in_bytes()) { 1290 __ movl(dest->as_register(), from_addr); 1291 } else { 1292 __ movptr(dest->as_register(), from_addr); 1293 } 1294 break; 1295 case T_INT: 1296 __ movl(dest->as_register(), from_addr); 1297 break; 1298 1299 case T_LONG: { 1300 Register to_lo = dest->as_register_lo(); 1301 Register to_hi = dest->as_register_hi(); 1302 #ifdef _LP64 1303 __ movptr(to_lo, as_Address_lo(addr)); 1304 #else 1305 Register base = addr->base()->as_register(); 1306 Register index = noreg; 1307 if (addr->index()->is_register()) { 1308 index = addr->index()->as_register(); 1309 } 1310 if ((base == to_lo && index == to_hi) || 1311 (base == to_hi && index == to_lo)) { 1312 // addresses with 2 registers are only formed as a result of 1313 // array access so this code will never have to deal with 1314 // patches or null checks. 1315 assert(info == NULL && patch == NULL, "must be"); 1316 __ lea(to_hi, as_Address(addr)); 1317 __ movl(to_lo, Address(to_hi, 0)); 1318 __ movl(to_hi, Address(to_hi, BytesPerWord)); 1319 } else if (base == to_lo || index == to_lo) { 1320 assert(base != to_hi, "can't be"); 1321 assert(index == noreg || (index != base && index != to_hi), "can't handle this"); 1322 __ movl(to_hi, as_Address_hi(addr)); 1323 if (patch != NULL) { 1324 patching_epilog(patch, lir_patch_high, base, info); 1325 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1326 patch_code = lir_patch_low; 1327 } 1328 __ movl(to_lo, as_Address_lo(addr)); 1329 } else { 1330 assert(index == noreg || (index != base && index != to_lo), "can't handle this"); 1331 __ movl(to_lo, as_Address_lo(addr)); 1332 if (patch != NULL) { 1333 patching_epilog(patch, lir_patch_low, base, info); 1334 patch = new PatchingStub(_masm, PatchingStub::access_field_id); 1335 patch_code = lir_patch_high; 1336 } 1337 __ movl(to_hi, as_Address_hi(addr)); 1338 } 1339 #endif // _LP64 1340 break; 1341 } 1342 1343 case T_BOOLEAN: // fall through 1344 case T_BYTE: { 1345 Register dest_reg = dest->as_register(); 1346 assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6"); 1347 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) { 1348 __ movsbl(dest_reg, from_addr); 1349 } else { 1350 __ movb(dest_reg, from_addr); 1351 __ shll(dest_reg, 24); 1352 __ sarl(dest_reg, 24); 1353 } 1354 break; 1355 } 1356 1357 case T_CHAR: { 1358 Register dest_reg = dest->as_register(); 1359 assert(VM_Version::is_P6() || dest_reg->has_byte_register(), "must use byte registers if not P6"); 1360 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) { 1361 __ movzwl(dest_reg, from_addr); 1362 } else { 1363 __ movw(dest_reg, from_addr); 1364 } 1365 break; 1366 } 1367 1368 case T_SHORT: { 1369 Register dest_reg = dest->as_register(); 1370 if (VM_Version::is_P6() || from_addr.uses(dest_reg)) { 1371 __ movswl(dest_reg, from_addr); 1372 } else { 1373 __ movw(dest_reg, from_addr); 1374 __ shll(dest_reg, 16); 1375 __ sarl(dest_reg, 16); 1376 } 1377 break; 1378 } 1379 1380 default: 1381 ShouldNotReachHere(); 1382 } 1383 1384 if (patch != NULL) { 1385 patching_epilog(patch, patch_code, addr->base()->as_register(), info); 1386 } 1387 1388 if (type == T_ARRAY || type == T_OBJECT) { 1389 #ifdef _LP64 1390 if (UseCompressedOops && !wide) { 1391 __ decode_heap_oop(dest->as_register()); 1392 } 1393 #endif 1394 __ verify_oop(dest->as_register()); 1395 } else if (type == T_ADDRESS && addr->disp() == oopDesc::klass_offset_in_bytes()) { 1396 #ifdef _LP64 1397 if (UseCompressedClassPointers) { 1398 __ decode_klass_not_null(dest->as_register()); 1399 } 1400 #endif 1401 } 1402 } 1403 1404 1405 void LIR_Assembler::prefetchr(LIR_Opr src) { 1406 LIR_Address* addr = src->as_address_ptr(); 1407 Address from_addr = as_Address(addr); 1408 1409 if (VM_Version::supports_sse()) { 1410 switch (ReadPrefetchInstr) { 1411 case 0: 1412 __ prefetchnta(from_addr); break; 1413 case 1: 1414 __ prefetcht0(from_addr); break; 1415 case 2: 1416 __ prefetcht2(from_addr); break; 1417 default: 1418 ShouldNotReachHere(); break; 1419 } 1420 } else if (VM_Version::supports_3dnow_prefetch()) { 1421 __ prefetchr(from_addr); 1422 } 1423 } 1424 1425 1426 void LIR_Assembler::prefetchw(LIR_Opr src) { 1427 LIR_Address* addr = src->as_address_ptr(); 1428 Address from_addr = as_Address(addr); 1429 1430 if (VM_Version::supports_sse()) { 1431 switch (AllocatePrefetchInstr) { 1432 case 0: 1433 __ prefetchnta(from_addr); break; 1434 case 1: 1435 __ prefetcht0(from_addr); break; 1436 case 2: 1437 __ prefetcht2(from_addr); break; 1438 case 3: 1439 __ prefetchw(from_addr); break; 1440 default: 1441 ShouldNotReachHere(); break; 1442 } 1443 } else if (VM_Version::supports_3dnow_prefetch()) { 1444 __ prefetchw(from_addr); 1445 } 1446 } 1447 1448 1449 NEEDS_CLEANUP; // This could be static? 1450 Address::ScaleFactor LIR_Assembler::array_element_size(BasicType type) const { 1451 int elem_size = type2aelembytes(type); 1452 switch (elem_size) { 1453 case 1: return Address::times_1; 1454 case 2: return Address::times_2; 1455 case 4: return Address::times_4; 1456 case 8: return Address::times_8; 1457 } 1458 ShouldNotReachHere(); 1459 return Address::no_scale; 1460 } 1461 1462 1463 void LIR_Assembler::emit_op3(LIR_Op3* op) { 1464 switch (op->code()) { 1465 case lir_idiv: 1466 case lir_irem: 1467 arithmetic_idiv(op->code(), 1468 op->in_opr1(), 1469 op->in_opr2(), 1470 op->in_opr3(), 1471 op->result_opr(), 1472 op->info()); 1473 break; 1474 default: ShouldNotReachHere(); break; 1475 } 1476 } 1477 1478 void LIR_Assembler::emit_opBranch(LIR_OpBranch* op) { 1479 #ifdef ASSERT 1480 assert(op->block() == NULL || op->block()->label() == op->label(), "wrong label"); 1481 if (op->block() != NULL) _branch_target_blocks.append(op->block()); 1482 if (op->ublock() != NULL) _branch_target_blocks.append(op->ublock()); 1483 #endif 1484 1485 if (op->cond() == lir_cond_always) { 1486 if (op->info() != NULL) add_debug_info_for_branch(op->info()); 1487 __ jmp (*(op->label())); 1488 } else { 1489 Assembler::Condition acond = Assembler::zero; 1490 if (op->code() == lir_cond_float_branch) { 1491 assert(op->ublock() != NULL, "must have unordered successor"); 1492 __ jcc(Assembler::parity, *(op->ublock()->label())); 1493 switch(op->cond()) { 1494 case lir_cond_equal: acond = Assembler::equal; break; 1495 case lir_cond_notEqual: acond = Assembler::notEqual; break; 1496 case lir_cond_less: acond = Assembler::below; break; 1497 case lir_cond_lessEqual: acond = Assembler::belowEqual; break; 1498 case lir_cond_greaterEqual: acond = Assembler::aboveEqual; break; 1499 case lir_cond_greater: acond = Assembler::above; break; 1500 default: ShouldNotReachHere(); 1501 } 1502 } else { 1503 switch (op->cond()) { 1504 case lir_cond_equal: acond = Assembler::equal; break; 1505 case lir_cond_notEqual: acond = Assembler::notEqual; break; 1506 case lir_cond_less: acond = Assembler::less; break; 1507 case lir_cond_lessEqual: acond = Assembler::lessEqual; break; 1508 case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break; 1509 case lir_cond_greater: acond = Assembler::greater; break; 1510 case lir_cond_belowEqual: acond = Assembler::belowEqual; break; 1511 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; break; 1512 default: ShouldNotReachHere(); 1513 } 1514 } 1515 __ jcc(acond,*(op->label())); 1516 } 1517 } 1518 1519 void LIR_Assembler::emit_opConvert(LIR_OpConvert* op) { 1520 LIR_Opr src = op->in_opr(); 1521 LIR_Opr dest = op->result_opr(); 1522 1523 switch (op->bytecode()) { 1524 case Bytecodes::_i2l: 1525 #ifdef _LP64 1526 __ movl2ptr(dest->as_register_lo(), src->as_register()); 1527 #else 1528 move_regs(src->as_register(), dest->as_register_lo()); 1529 move_regs(src->as_register(), dest->as_register_hi()); 1530 __ sarl(dest->as_register_hi(), 31); 1531 #endif // LP64 1532 break; 1533 1534 case Bytecodes::_l2i: 1535 #ifdef _LP64 1536 __ movl(dest->as_register(), src->as_register_lo()); 1537 #else 1538 move_regs(src->as_register_lo(), dest->as_register()); 1539 #endif 1540 break; 1541 1542 case Bytecodes::_i2b: 1543 move_regs(src->as_register(), dest->as_register()); 1544 __ sign_extend_byte(dest->as_register()); 1545 break; 1546 1547 case Bytecodes::_i2c: 1548 move_regs(src->as_register(), dest->as_register()); 1549 __ andl(dest->as_register(), 0xFFFF); 1550 break; 1551 1552 case Bytecodes::_i2s: 1553 move_regs(src->as_register(), dest->as_register()); 1554 __ sign_extend_short(dest->as_register()); 1555 break; 1556 1557 1558 case Bytecodes::_f2d: 1559 case Bytecodes::_d2f: 1560 if (dest->is_single_xmm()) { 1561 __ cvtsd2ss(dest->as_xmm_float_reg(), src->as_xmm_double_reg()); 1562 } else if (dest->is_double_xmm()) { 1563 __ cvtss2sd(dest->as_xmm_double_reg(), src->as_xmm_float_reg()); 1564 } else { 1565 assert(src->fpu() == dest->fpu(), "register must be equal"); 1566 // do nothing (float result is rounded later through spilling) 1567 } 1568 break; 1569 1570 case Bytecodes::_i2f: 1571 case Bytecodes::_i2d: 1572 if (dest->is_single_xmm()) { 1573 __ cvtsi2ssl(dest->as_xmm_float_reg(), src->as_register()); 1574 } else if (dest->is_double_xmm()) { 1575 __ cvtsi2sdl(dest->as_xmm_double_reg(), src->as_register()); 1576 } else { 1577 assert(dest->fpu() == 0, "result must be on TOS"); 1578 __ movl(Address(rsp, 0), src->as_register()); 1579 __ fild_s(Address(rsp, 0)); 1580 } 1581 break; 1582 1583 case Bytecodes::_f2i: 1584 case Bytecodes::_d2i: 1585 if (src->is_single_xmm()) { 1586 __ cvttss2sil(dest->as_register(), src->as_xmm_float_reg()); 1587 } else if (src->is_double_xmm()) { 1588 __ cvttsd2sil(dest->as_register(), src->as_xmm_double_reg()); 1589 } else { 1590 assert(src->fpu() == 0, "input must be on TOS"); 1591 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_trunc())); 1592 __ fist_s(Address(rsp, 0)); 1593 __ movl(dest->as_register(), Address(rsp, 0)); 1594 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); 1595 } 1596 1597 // IA32 conversion instructions do not match JLS for overflow, underflow and NaN -> fixup in stub 1598 assert(op->stub() != NULL, "stub required"); 1599 __ cmpl(dest->as_register(), 0x80000000); 1600 __ jcc(Assembler::equal, *op->stub()->entry()); 1601 __ bind(*op->stub()->continuation()); 1602 break; 1603 1604 case Bytecodes::_l2f: 1605 case Bytecodes::_l2d: 1606 assert(!dest->is_xmm_register(), "result in xmm register not supported (no SSE instruction present)"); 1607 assert(dest->fpu() == 0, "result must be on TOS"); 1608 1609 __ movptr(Address(rsp, 0), src->as_register_lo()); 1610 NOT_LP64(__ movl(Address(rsp, BytesPerWord), src->as_register_hi())); 1611 __ fild_d(Address(rsp, 0)); 1612 // float result is rounded later through spilling 1613 break; 1614 1615 case Bytecodes::_f2l: 1616 case Bytecodes::_d2l: 1617 assert(!src->is_xmm_register(), "input in xmm register not supported (no SSE instruction present)"); 1618 assert(src->fpu() == 0, "input must be on TOS"); 1619 assert(dest == FrameMap::long0_opr, "runtime stub places result in these registers"); 1620 1621 // instruction sequence too long to inline it here 1622 { 1623 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::fpu2long_stub_id))); 1624 } 1625 break; 1626 1627 default: ShouldNotReachHere(); 1628 } 1629 } 1630 1631 void LIR_Assembler::emit_alloc_obj(LIR_OpAllocObj* op) { 1632 if (op->init_check()) { 1633 __ cmpb(Address(op->klass()->as_register(), 1634 InstanceKlass::init_state_offset()), 1635 InstanceKlass::fully_initialized); 1636 add_debug_info_for_null_check_here(op->stub()->info()); 1637 __ jcc(Assembler::notEqual, *op->stub()->entry()); 1638 } 1639 __ allocate_object(op->obj()->as_register(), 1640 op->tmp1()->as_register(), 1641 op->tmp2()->as_register(), 1642 op->header_size(), 1643 op->object_size(), 1644 op->klass()->as_register(), 1645 *op->stub()->entry()); 1646 __ bind(*op->stub()->continuation()); 1647 } 1648 1649 void LIR_Assembler::emit_alloc_array(LIR_OpAllocArray* op) { 1650 Register len = op->len()->as_register(); 1651 LP64_ONLY( __ movslq(len, len); ) 1652 1653 if (UseSlowPath || 1654 (!UseFastNewObjectArray && (op->type() == T_OBJECT || op->type() == T_ARRAY)) || 1655 (!UseFastNewTypeArray && (op->type() != T_OBJECT && op->type() != T_ARRAY))) { 1656 __ jmp(*op->stub()->entry()); 1657 } else { 1658 Register tmp1 = op->tmp1()->as_register(); 1659 Register tmp2 = op->tmp2()->as_register(); 1660 Register tmp3 = op->tmp3()->as_register(); 1661 if (len == tmp1) { 1662 tmp1 = tmp3; 1663 } else if (len == tmp2) { 1664 tmp2 = tmp3; 1665 } else if (len == tmp3) { 1666 // everything is ok 1667 } else { 1668 __ mov(tmp3, len); 1669 } 1670 __ allocate_array(op->obj()->as_register(), 1671 len, 1672 tmp1, 1673 tmp2, 1674 arrayOopDesc::header_size(op->type()), 1675 array_element_size(op->type()), 1676 op->klass()->as_register(), 1677 *op->stub()->entry()); 1678 } 1679 __ bind(*op->stub()->continuation()); 1680 } 1681 1682 void LIR_Assembler::type_profile_helper(Register mdo, 1683 ciMethodData *md, ciProfileData *data, 1684 Register recv, Label* update_done) { 1685 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) { 1686 Label next_test; 1687 // See if the receiver is receiver[n]. 1688 __ cmpptr(recv, Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i)))); 1689 __ jccb(Assembler::notEqual, next_test); 1690 Address data_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i))); 1691 __ addptr(data_addr, DataLayout::counter_increment); 1692 __ jmp(*update_done); 1693 __ bind(next_test); 1694 } 1695 1696 // Didn't find receiver; find next empty slot and fill it in 1697 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) { 1698 Label next_test; 1699 Address recv_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i))); 1700 __ cmpptr(recv_addr, (intptr_t)NULL_WORD); 1701 __ jccb(Assembler::notEqual, next_test); 1702 __ movptr(recv_addr, recv); 1703 __ movptr(Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i))), DataLayout::counter_increment); 1704 __ jmp(*update_done); 1705 __ bind(next_test); 1706 } 1707 } 1708 1709 void LIR_Assembler::emit_typecheck_helper(LIR_OpTypeCheck *op, Label* success, Label* failure, Label* obj_is_null) { 1710 // we always need a stub for the failure case. 1711 CodeStub* stub = op->stub(); 1712 Register obj = op->object()->as_register(); 1713 Register k_RInfo = op->tmp1()->as_register(); 1714 Register klass_RInfo = op->tmp2()->as_register(); 1715 Register dst = op->result_opr()->as_register(); 1716 ciKlass* k = op->klass(); 1717 Register Rtmp1 = noreg; 1718 1719 // check if it needs to be profiled 1720 ciMethodData* md = NULL; 1721 ciProfileData* data = NULL; 1722 1723 if (op->should_profile()) { 1724 ciMethod* method = op->profiled_method(); 1725 assert(method != NULL, "Should have method"); 1726 int bci = op->profiled_bci(); 1727 md = method->method_data_or_null(); 1728 assert(md != NULL, "Sanity"); 1729 data = md->bci_to_data(bci); 1730 assert(data != NULL, "need data for type check"); 1731 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check"); 1732 } 1733 Label profile_cast_success, profile_cast_failure; 1734 Label *success_target = op->should_profile() ? &profile_cast_success : success; 1735 Label *failure_target = op->should_profile() ? &profile_cast_failure : failure; 1736 1737 if (obj == k_RInfo) { 1738 k_RInfo = dst; 1739 } else if (obj == klass_RInfo) { 1740 klass_RInfo = dst; 1741 } 1742 if (k->is_loaded() && !UseCompressedClassPointers) { 1743 select_different_registers(obj, dst, k_RInfo, klass_RInfo); 1744 } else { 1745 Rtmp1 = op->tmp3()->as_register(); 1746 select_different_registers(obj, dst, k_RInfo, klass_RInfo, Rtmp1); 1747 } 1748 1749 assert_different_registers(obj, k_RInfo, klass_RInfo); 1750 1751 __ cmpptr(obj, (int32_t)NULL_WORD); 1752 if (op->should_profile()) { 1753 Label not_null; 1754 __ jccb(Assembler::notEqual, not_null); 1755 // Object is null; update MDO and exit 1756 Register mdo = klass_RInfo; 1757 __ mov_metadata(mdo, md->constant_encoding()); 1758 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::header_offset())); 1759 int header_bits = DataLayout::flag_mask_to_header_mask(BitData::null_seen_byte_constant()); 1760 __ orl(data_addr, header_bits); 1761 __ jmp(*obj_is_null); 1762 __ bind(not_null); 1763 } else { 1764 __ jcc(Assembler::equal, *obj_is_null); 1765 } 1766 1767 if (!k->is_loaded()) { 1768 klass2reg_with_patching(k_RInfo, op->info_for_patch()); 1769 } else { 1770 #ifdef _LP64 1771 __ mov_metadata(k_RInfo, k->constant_encoding()); 1772 #endif // _LP64 1773 } 1774 __ verify_oop(obj); 1775 1776 if (op->fast_check()) { 1777 // get object class 1778 // not a safepoint as obj null check happens earlier 1779 #ifdef _LP64 1780 if (UseCompressedClassPointers) { 1781 __ load_klass(Rtmp1, obj); 1782 __ cmpptr(k_RInfo, Rtmp1); 1783 } else { 1784 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes())); 1785 } 1786 #else 1787 if (k->is_loaded()) { 1788 __ cmpklass(Address(obj, oopDesc::klass_offset_in_bytes()), k->constant_encoding()); 1789 } else { 1790 __ cmpptr(k_RInfo, Address(obj, oopDesc::klass_offset_in_bytes())); 1791 } 1792 #endif 1793 __ jcc(Assembler::notEqual, *failure_target); 1794 // successful cast, fall through to profile or jump 1795 } else { 1796 // get object class 1797 // not a safepoint as obj null check happens earlier 1798 __ load_klass(klass_RInfo, obj); 1799 if (k->is_loaded()) { 1800 // See if we get an immediate positive hit 1801 #ifdef _LP64 1802 __ cmpptr(k_RInfo, Address(klass_RInfo, k->super_check_offset())); 1803 #else 1804 __ cmpklass(Address(klass_RInfo, k->super_check_offset()), k->constant_encoding()); 1805 #endif // _LP64 1806 if ((juint)in_bytes(Klass::secondary_super_cache_offset()) != k->super_check_offset()) { 1807 __ jcc(Assembler::notEqual, *failure_target); 1808 // successful cast, fall through to profile or jump 1809 } else { 1810 // See if we get an immediate positive hit 1811 __ jcc(Assembler::equal, *success_target); 1812 // check for self 1813 #ifdef _LP64 1814 __ cmpptr(klass_RInfo, k_RInfo); 1815 #else 1816 __ cmpklass(klass_RInfo, k->constant_encoding()); 1817 #endif // _LP64 1818 __ jcc(Assembler::equal, *success_target); 1819 1820 __ push(klass_RInfo); 1821 #ifdef _LP64 1822 __ push(k_RInfo); 1823 #else 1824 __ pushklass(k->constant_encoding()); 1825 #endif // _LP64 1826 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 1827 __ pop(klass_RInfo); 1828 __ pop(klass_RInfo); 1829 // result is a boolean 1830 __ cmpl(klass_RInfo, 0); 1831 __ jcc(Assembler::equal, *failure_target); 1832 // successful cast, fall through to profile or jump 1833 } 1834 } else { 1835 // perform the fast part of the checking logic 1836 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL); 1837 // call out-of-line instance of __ check_klass_subtype_slow_path(...): 1838 __ push(klass_RInfo); 1839 __ push(k_RInfo); 1840 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 1841 __ pop(klass_RInfo); 1842 __ pop(k_RInfo); 1843 // result is a boolean 1844 __ cmpl(k_RInfo, 0); 1845 __ jcc(Assembler::equal, *failure_target); 1846 // successful cast, fall through to profile or jump 1847 } 1848 } 1849 if (op->should_profile()) { 1850 Register mdo = klass_RInfo, recv = k_RInfo; 1851 __ bind(profile_cast_success); 1852 __ mov_metadata(mdo, md->constant_encoding()); 1853 __ load_klass(recv, obj); 1854 Label update_done; 1855 type_profile_helper(mdo, md, data, recv, success); 1856 __ jmp(*success); 1857 1858 __ bind(profile_cast_failure); 1859 __ mov_metadata(mdo, md->constant_encoding()); 1860 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset())); 1861 __ subptr(counter_addr, DataLayout::counter_increment); 1862 __ jmp(*failure); 1863 } 1864 __ jmp(*success); 1865 } 1866 1867 1868 void LIR_Assembler::emit_opTypeCheck(LIR_OpTypeCheck* op) { 1869 LIR_Code code = op->code(); 1870 if (code == lir_store_check) { 1871 Register value = op->object()->as_register(); 1872 Register array = op->array()->as_register(); 1873 Register k_RInfo = op->tmp1()->as_register(); 1874 Register klass_RInfo = op->tmp2()->as_register(); 1875 Register Rtmp1 = op->tmp3()->as_register(); 1876 1877 CodeStub* stub = op->stub(); 1878 1879 // check if it needs to be profiled 1880 ciMethodData* md = NULL; 1881 ciProfileData* data = NULL; 1882 1883 if (op->should_profile()) { 1884 ciMethod* method = op->profiled_method(); 1885 assert(method != NULL, "Should have method"); 1886 int bci = op->profiled_bci(); 1887 md = method->method_data_or_null(); 1888 assert(md != NULL, "Sanity"); 1889 data = md->bci_to_data(bci); 1890 assert(data != NULL, "need data for type check"); 1891 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check"); 1892 } 1893 Label profile_cast_success, profile_cast_failure, done; 1894 Label *success_target = op->should_profile() ? &profile_cast_success : &done; 1895 Label *failure_target = op->should_profile() ? &profile_cast_failure : stub->entry(); 1896 1897 __ cmpptr(value, (int32_t)NULL_WORD); 1898 if (op->should_profile()) { 1899 Label not_null; 1900 __ jccb(Assembler::notEqual, not_null); 1901 // Object is null; update MDO and exit 1902 Register mdo = klass_RInfo; 1903 __ mov_metadata(mdo, md->constant_encoding()); 1904 Address data_addr(mdo, md->byte_offset_of_slot(data, DataLayout::header_offset())); 1905 int header_bits = DataLayout::flag_mask_to_header_mask(BitData::null_seen_byte_constant()); 1906 __ orl(data_addr, header_bits); 1907 __ jmp(done); 1908 __ bind(not_null); 1909 } else { 1910 __ jcc(Assembler::equal, done); 1911 } 1912 1913 add_debug_info_for_null_check_here(op->info_for_exception()); 1914 __ load_klass(k_RInfo, array); 1915 __ load_klass(klass_RInfo, value); 1916 1917 // get instance klass (it's already uncompressed) 1918 __ movptr(k_RInfo, Address(k_RInfo, ObjArrayKlass::element_klass_offset())); 1919 // perform the fast part of the checking logic 1920 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL); 1921 // call out-of-line instance of __ check_klass_subtype_slow_path(...): 1922 __ push(klass_RInfo); 1923 __ push(k_RInfo); 1924 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 1925 __ pop(klass_RInfo); 1926 __ pop(k_RInfo); 1927 // result is a boolean 1928 __ cmpl(k_RInfo, 0); 1929 __ jcc(Assembler::equal, *failure_target); 1930 // fall through to the success case 1931 1932 if (op->should_profile()) { 1933 Register mdo = klass_RInfo, recv = k_RInfo; 1934 __ bind(profile_cast_success); 1935 __ mov_metadata(mdo, md->constant_encoding()); 1936 __ load_klass(recv, value); 1937 Label update_done; 1938 type_profile_helper(mdo, md, data, recv, &done); 1939 __ jmpb(done); 1940 1941 __ bind(profile_cast_failure); 1942 __ mov_metadata(mdo, md->constant_encoding()); 1943 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset())); 1944 __ subptr(counter_addr, DataLayout::counter_increment); 1945 __ jmp(*stub->entry()); 1946 } 1947 1948 __ bind(done); 1949 } else 1950 if (code == lir_checkcast) { 1951 Register obj = op->object()->as_register(); 1952 Register dst = op->result_opr()->as_register(); 1953 Label success; 1954 emit_typecheck_helper(op, &success, op->stub()->entry(), &success); 1955 __ bind(success); 1956 if (dst != obj) { 1957 __ mov(dst, obj); 1958 } 1959 } else 1960 if (code == lir_instanceof) { 1961 Register obj = op->object()->as_register(); 1962 Register dst = op->result_opr()->as_register(); 1963 Label success, failure, done; 1964 emit_typecheck_helper(op, &success, &failure, &failure); 1965 __ bind(failure); 1966 __ xorptr(dst, dst); 1967 __ jmpb(done); 1968 __ bind(success); 1969 __ movptr(dst, 1); 1970 __ bind(done); 1971 } else { 1972 ShouldNotReachHere(); 1973 } 1974 1975 } 1976 1977 1978 void LIR_Assembler::emit_compare_and_swap(LIR_OpCompareAndSwap* op) { 1979 if (LP64_ONLY(false &&) op->code() == lir_cas_long && VM_Version::supports_cx8()) { 1980 assert(op->cmp_value()->as_register_lo() == rax, "wrong register"); 1981 assert(op->cmp_value()->as_register_hi() == rdx, "wrong register"); 1982 assert(op->new_value()->as_register_lo() == rbx, "wrong register"); 1983 assert(op->new_value()->as_register_hi() == rcx, "wrong register"); 1984 Register addr = op->addr()->as_register(); 1985 if (os::is_MP()) { 1986 __ lock(); 1987 } 1988 NOT_LP64(__ cmpxchg8(Address(addr, 0))); 1989 1990 } else if (op->code() == lir_cas_int || op->code() == lir_cas_obj ) { 1991 NOT_LP64(assert(op->addr()->is_single_cpu(), "must be single");) 1992 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo()); 1993 Register newval = op->new_value()->as_register(); 1994 Register cmpval = op->cmp_value()->as_register(); 1995 assert(cmpval == rax, "wrong register"); 1996 assert(newval != NULL, "new val must be register"); 1997 assert(cmpval != newval, "cmp and new values must be in different registers"); 1998 assert(cmpval != addr, "cmp and addr must be in different registers"); 1999 assert(newval != addr, "new value and addr must be in different registers"); 2000 2001 if ( op->code() == lir_cas_obj) { 2002 #ifdef _LP64 2003 if (UseCompressedOops) { 2004 #if INCLUDE_ALL_GCS 2005 if (UseShenandoahGC && ShenandoahCASBarrier) { 2006 Register tmp1 = op->tmp1()->as_register(); 2007 Register tmp2 = op->tmp2()->as_register(); 2008 2009 __ encode_heap_oop(cmpval); 2010 __ mov(rscratch1, newval); 2011 __ encode_heap_oop(rscratch1); 2012 ShenandoahBarrierSetAssembler::bsasm()->cmpxchg_oop(_masm, NULL, Address(addr, 0), cmpval, rscratch1, true, tmp1, tmp2); 2013 } else 2014 #endif 2015 { 2016 __ encode_heap_oop(cmpval); 2017 __ mov(rscratch1, newval); 2018 __ encode_heap_oop(rscratch1); 2019 if (os::is_MP()) { 2020 __ lock(); 2021 } 2022 // cmpval (rax) is implicitly used by this instruction 2023 __ cmpxchgl(rscratch1, Address(addr, 0)); 2024 } 2025 } else 2026 #endif 2027 { 2028 #if INCLUDE_ALL_GCS 2029 if (UseShenandoahGC && ShenandoahCASBarrier) { 2030 Register tmp1 = op->tmp1()->as_register(); 2031 Register tmp2 = op->tmp2()->as_register(); 2032 ShenandoahBarrierSetAssembler::bsasm()->cmpxchg_oop(_masm, NULL, Address(addr, 0), cmpval, newval, true, tmp1, tmp2); 2033 } else 2034 #endif 2035 { 2036 if (os::is_MP()) { 2037 __ lock(); 2038 } 2039 __ cmpxchgptr(newval, Address(addr, 0)); 2040 } 2041 } 2042 } else { 2043 assert(op->code() == lir_cas_int, "lir_cas_int expected"); 2044 if (os::is_MP()) { 2045 __ lock(); 2046 } 2047 __ cmpxchgl(newval, Address(addr, 0)); 2048 } 2049 #ifdef _LP64 2050 } else if (op->code() == lir_cas_long) { 2051 Register addr = (op->addr()->is_single_cpu() ? op->addr()->as_register() : op->addr()->as_register_lo()); 2052 Register newval = op->new_value()->as_register_lo(); 2053 Register cmpval = op->cmp_value()->as_register_lo(); 2054 assert(cmpval == rax, "wrong register"); 2055 assert(newval != NULL, "new val must be register"); 2056 assert(cmpval != newval, "cmp and new values must be in different registers"); 2057 assert(cmpval != addr, "cmp and addr must be in different registers"); 2058 assert(newval != addr, "new value and addr must be in different registers"); 2059 if (os::is_MP()) { 2060 __ lock(); 2061 } 2062 __ cmpxchgq(newval, Address(addr, 0)); 2063 #endif // _LP64 2064 } else { 2065 Unimplemented(); 2066 } 2067 } 2068 2069 void LIR_Assembler::cmove(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result, BasicType type) { 2070 Assembler::Condition acond, ncond; 2071 switch (condition) { 2072 case lir_cond_equal: acond = Assembler::equal; ncond = Assembler::notEqual; break; 2073 case lir_cond_notEqual: acond = Assembler::notEqual; ncond = Assembler::equal; break; 2074 case lir_cond_less: acond = Assembler::less; ncond = Assembler::greaterEqual; break; 2075 case lir_cond_lessEqual: acond = Assembler::lessEqual; ncond = Assembler::greater; break; 2076 case lir_cond_greaterEqual: acond = Assembler::greaterEqual; ncond = Assembler::less; break; 2077 case lir_cond_greater: acond = Assembler::greater; ncond = Assembler::lessEqual; break; 2078 case lir_cond_belowEqual: acond = Assembler::belowEqual; ncond = Assembler::above; break; 2079 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; ncond = Assembler::below; break; 2080 default: acond = Assembler::equal; ncond = Assembler::notEqual; 2081 ShouldNotReachHere(); 2082 } 2083 2084 if (opr1->is_cpu_register()) { 2085 reg2reg(opr1, result); 2086 } else if (opr1->is_stack()) { 2087 stack2reg(opr1, result, result->type()); 2088 } else if (opr1->is_constant()) { 2089 const2reg(opr1, result, lir_patch_none, NULL); 2090 } else { 2091 ShouldNotReachHere(); 2092 } 2093 2094 if (VM_Version::supports_cmov() && !opr2->is_constant()) { 2095 // optimized version that does not require a branch 2096 if (opr2->is_single_cpu()) { 2097 assert(opr2->cpu_regnr() != result->cpu_regnr(), "opr2 already overwritten by previous move"); 2098 __ cmov(ncond, result->as_register(), opr2->as_register()); 2099 } else if (opr2->is_double_cpu()) { 2100 assert(opr2->cpu_regnrLo() != result->cpu_regnrLo() && opr2->cpu_regnrLo() != result->cpu_regnrHi(), "opr2 already overwritten by previous move"); 2101 assert(opr2->cpu_regnrHi() != result->cpu_regnrLo() && opr2->cpu_regnrHi() != result->cpu_regnrHi(), "opr2 already overwritten by previous move"); 2102 __ cmovptr(ncond, result->as_register_lo(), opr2->as_register_lo()); 2103 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), opr2->as_register_hi());) 2104 } else if (opr2->is_single_stack()) { 2105 __ cmovl(ncond, result->as_register(), frame_map()->address_for_slot(opr2->single_stack_ix())); 2106 } else if (opr2->is_double_stack()) { 2107 __ cmovptr(ncond, result->as_register_lo(), frame_map()->address_for_slot(opr2->double_stack_ix(), lo_word_offset_in_bytes)); 2108 NOT_LP64(__ cmovptr(ncond, result->as_register_hi(), frame_map()->address_for_slot(opr2->double_stack_ix(), hi_word_offset_in_bytes));) 2109 } else { 2110 ShouldNotReachHere(); 2111 } 2112 2113 } else { 2114 Label skip; 2115 __ jcc (acond, skip); 2116 if (opr2->is_cpu_register()) { 2117 reg2reg(opr2, result); 2118 } else if (opr2->is_stack()) { 2119 stack2reg(opr2, result, result->type()); 2120 } else if (opr2->is_constant()) { 2121 const2reg(opr2, result, lir_patch_none, NULL); 2122 } else { 2123 ShouldNotReachHere(); 2124 } 2125 __ bind(skip); 2126 } 2127 } 2128 2129 2130 void LIR_Assembler::arith_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dest, CodeEmitInfo* info, bool pop_fpu_stack) { 2131 assert(info == NULL, "should never be used, idiv/irem and ldiv/lrem not handled by this method"); 2132 2133 if (left->is_single_cpu()) { 2134 assert(left == dest, "left and dest must be equal"); 2135 Register lreg = left->as_register(); 2136 2137 if (right->is_single_cpu()) { 2138 // cpu register - cpu register 2139 Register rreg = right->as_register(); 2140 switch (code) { 2141 case lir_add: __ addl (lreg, rreg); break; 2142 case lir_sub: __ subl (lreg, rreg); break; 2143 case lir_mul: __ imull(lreg, rreg); break; 2144 default: ShouldNotReachHere(); 2145 } 2146 2147 } else if (right->is_stack()) { 2148 // cpu register - stack 2149 Address raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2150 switch (code) { 2151 case lir_add: __ addl(lreg, raddr); break; 2152 case lir_sub: __ subl(lreg, raddr); break; 2153 default: ShouldNotReachHere(); 2154 } 2155 2156 } else if (right->is_constant()) { 2157 // cpu register - constant 2158 jint c = right->as_constant_ptr()->as_jint(); 2159 switch (code) { 2160 case lir_add: { 2161 __ incrementl(lreg, c); 2162 break; 2163 } 2164 case lir_sub: { 2165 __ decrementl(lreg, c); 2166 break; 2167 } 2168 default: ShouldNotReachHere(); 2169 } 2170 2171 } else { 2172 ShouldNotReachHere(); 2173 } 2174 2175 } else if (left->is_double_cpu()) { 2176 assert(left == dest, "left and dest must be equal"); 2177 Register lreg_lo = left->as_register_lo(); 2178 Register lreg_hi = left->as_register_hi(); 2179 2180 if (right->is_double_cpu()) { 2181 // cpu register - cpu register 2182 Register rreg_lo = right->as_register_lo(); 2183 Register rreg_hi = right->as_register_hi(); 2184 NOT_LP64(assert_different_registers(lreg_lo, lreg_hi, rreg_lo, rreg_hi)); 2185 LP64_ONLY(assert_different_registers(lreg_lo, rreg_lo)); 2186 switch (code) { 2187 case lir_add: 2188 __ addptr(lreg_lo, rreg_lo); 2189 NOT_LP64(__ adcl(lreg_hi, rreg_hi)); 2190 break; 2191 case lir_sub: 2192 __ subptr(lreg_lo, rreg_lo); 2193 NOT_LP64(__ sbbl(lreg_hi, rreg_hi)); 2194 break; 2195 case lir_mul: 2196 #ifdef _LP64 2197 __ imulq(lreg_lo, rreg_lo); 2198 #else 2199 assert(lreg_lo == rax && lreg_hi == rdx, "must be"); 2200 __ imull(lreg_hi, rreg_lo); 2201 __ imull(rreg_hi, lreg_lo); 2202 __ addl (rreg_hi, lreg_hi); 2203 __ mull (rreg_lo); 2204 __ addl (lreg_hi, rreg_hi); 2205 #endif // _LP64 2206 break; 2207 default: 2208 ShouldNotReachHere(); 2209 } 2210 2211 } else if (right->is_constant()) { 2212 // cpu register - constant 2213 #ifdef _LP64 2214 jlong c = right->as_constant_ptr()->as_jlong_bits(); 2215 __ movptr(r10, (intptr_t) c); 2216 switch (code) { 2217 case lir_add: 2218 __ addptr(lreg_lo, r10); 2219 break; 2220 case lir_sub: 2221 __ subptr(lreg_lo, r10); 2222 break; 2223 default: 2224 ShouldNotReachHere(); 2225 } 2226 #else 2227 jint c_lo = right->as_constant_ptr()->as_jint_lo(); 2228 jint c_hi = right->as_constant_ptr()->as_jint_hi(); 2229 switch (code) { 2230 case lir_add: 2231 __ addptr(lreg_lo, c_lo); 2232 __ adcl(lreg_hi, c_hi); 2233 break; 2234 case lir_sub: 2235 __ subptr(lreg_lo, c_lo); 2236 __ sbbl(lreg_hi, c_hi); 2237 break; 2238 default: 2239 ShouldNotReachHere(); 2240 } 2241 #endif // _LP64 2242 2243 } else { 2244 ShouldNotReachHere(); 2245 } 2246 2247 } else if (left->is_single_xmm()) { 2248 assert(left == dest, "left and dest must be equal"); 2249 XMMRegister lreg = left->as_xmm_float_reg(); 2250 2251 if (right->is_single_xmm()) { 2252 XMMRegister rreg = right->as_xmm_float_reg(); 2253 switch (code) { 2254 case lir_add: __ addss(lreg, rreg); break; 2255 case lir_sub: __ subss(lreg, rreg); break; 2256 case lir_mul_strictfp: // fall through 2257 case lir_mul: __ mulss(lreg, rreg); break; 2258 case lir_div_strictfp: // fall through 2259 case lir_div: __ divss(lreg, rreg); break; 2260 default: ShouldNotReachHere(); 2261 } 2262 } else { 2263 Address raddr; 2264 if (right->is_single_stack()) { 2265 raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2266 } else if (right->is_constant()) { 2267 // hack for now 2268 raddr = __ as_Address(InternalAddress(float_constant(right->as_jfloat()))); 2269 } else { 2270 ShouldNotReachHere(); 2271 } 2272 switch (code) { 2273 case lir_add: __ addss(lreg, raddr); break; 2274 case lir_sub: __ subss(lreg, raddr); break; 2275 case lir_mul_strictfp: // fall through 2276 case lir_mul: __ mulss(lreg, raddr); break; 2277 case lir_div_strictfp: // fall through 2278 case lir_div: __ divss(lreg, raddr); break; 2279 default: ShouldNotReachHere(); 2280 } 2281 } 2282 2283 } else if (left->is_double_xmm()) { 2284 assert(left == dest, "left and dest must be equal"); 2285 2286 XMMRegister lreg = left->as_xmm_double_reg(); 2287 if (right->is_double_xmm()) { 2288 XMMRegister rreg = right->as_xmm_double_reg(); 2289 switch (code) { 2290 case lir_add: __ addsd(lreg, rreg); break; 2291 case lir_sub: __ subsd(lreg, rreg); break; 2292 case lir_mul_strictfp: // fall through 2293 case lir_mul: __ mulsd(lreg, rreg); break; 2294 case lir_div_strictfp: // fall through 2295 case lir_div: __ divsd(lreg, rreg); break; 2296 default: ShouldNotReachHere(); 2297 } 2298 } else { 2299 Address raddr; 2300 if (right->is_double_stack()) { 2301 raddr = frame_map()->address_for_slot(right->double_stack_ix()); 2302 } else if (right->is_constant()) { 2303 // hack for now 2304 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble()))); 2305 } else { 2306 ShouldNotReachHere(); 2307 } 2308 switch (code) { 2309 case lir_add: __ addsd(lreg, raddr); break; 2310 case lir_sub: __ subsd(lreg, raddr); break; 2311 case lir_mul_strictfp: // fall through 2312 case lir_mul: __ mulsd(lreg, raddr); break; 2313 case lir_div_strictfp: // fall through 2314 case lir_div: __ divsd(lreg, raddr); break; 2315 default: ShouldNotReachHere(); 2316 } 2317 } 2318 2319 } else if (left->is_single_fpu()) { 2320 assert(dest->is_single_fpu(), "fpu stack allocation required"); 2321 2322 if (right->is_single_fpu()) { 2323 arith_fpu_implementation(code, left->fpu_regnr(), right->fpu_regnr(), dest->fpu_regnr(), pop_fpu_stack); 2324 2325 } else { 2326 assert(left->fpu_regnr() == 0, "left must be on TOS"); 2327 assert(dest->fpu_regnr() == 0, "dest must be on TOS"); 2328 2329 Address raddr; 2330 if (right->is_single_stack()) { 2331 raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2332 } else if (right->is_constant()) { 2333 address const_addr = float_constant(right->as_jfloat()); 2334 assert(const_addr != NULL, "incorrect float/double constant maintainance"); 2335 // hack for now 2336 raddr = __ as_Address(InternalAddress(const_addr)); 2337 } else { 2338 ShouldNotReachHere(); 2339 } 2340 2341 switch (code) { 2342 case lir_add: __ fadd_s(raddr); break; 2343 case lir_sub: __ fsub_s(raddr); break; 2344 case lir_mul_strictfp: // fall through 2345 case lir_mul: __ fmul_s(raddr); break; 2346 case lir_div_strictfp: // fall through 2347 case lir_div: __ fdiv_s(raddr); break; 2348 default: ShouldNotReachHere(); 2349 } 2350 } 2351 2352 } else if (left->is_double_fpu()) { 2353 assert(dest->is_double_fpu(), "fpu stack allocation required"); 2354 2355 if (code == lir_mul_strictfp || code == lir_div_strictfp) { 2356 // Double values require special handling for strictfp mul/div on x86 2357 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias1())); 2358 __ fmulp(left->fpu_regnrLo() + 1); 2359 } 2360 2361 if (right->is_double_fpu()) { 2362 arith_fpu_implementation(code, left->fpu_regnrLo(), right->fpu_regnrLo(), dest->fpu_regnrLo(), pop_fpu_stack); 2363 2364 } else { 2365 assert(left->fpu_regnrLo() == 0, "left must be on TOS"); 2366 assert(dest->fpu_regnrLo() == 0, "dest must be on TOS"); 2367 2368 Address raddr; 2369 if (right->is_double_stack()) { 2370 raddr = frame_map()->address_for_slot(right->double_stack_ix()); 2371 } else if (right->is_constant()) { 2372 // hack for now 2373 raddr = __ as_Address(InternalAddress(double_constant(right->as_jdouble()))); 2374 } else { 2375 ShouldNotReachHere(); 2376 } 2377 2378 switch (code) { 2379 case lir_add: __ fadd_d(raddr); break; 2380 case lir_sub: __ fsub_d(raddr); break; 2381 case lir_mul_strictfp: // fall through 2382 case lir_mul: __ fmul_d(raddr); break; 2383 case lir_div_strictfp: // fall through 2384 case lir_div: __ fdiv_d(raddr); break; 2385 default: ShouldNotReachHere(); 2386 } 2387 } 2388 2389 if (code == lir_mul_strictfp || code == lir_div_strictfp) { 2390 // Double values require special handling for strictfp mul/div on x86 2391 __ fld_x(ExternalAddress(StubRoutines::addr_fpu_subnormal_bias2())); 2392 __ fmulp(dest->fpu_regnrLo() + 1); 2393 } 2394 2395 } else if (left->is_single_stack() || left->is_address()) { 2396 assert(left == dest, "left and dest must be equal"); 2397 2398 Address laddr; 2399 if (left->is_single_stack()) { 2400 laddr = frame_map()->address_for_slot(left->single_stack_ix()); 2401 } else if (left->is_address()) { 2402 laddr = as_Address(left->as_address_ptr()); 2403 } else { 2404 ShouldNotReachHere(); 2405 } 2406 2407 if (right->is_single_cpu()) { 2408 Register rreg = right->as_register(); 2409 switch (code) { 2410 case lir_add: __ addl(laddr, rreg); break; 2411 case lir_sub: __ subl(laddr, rreg); break; 2412 default: ShouldNotReachHere(); 2413 } 2414 } else if (right->is_constant()) { 2415 jint c = right->as_constant_ptr()->as_jint(); 2416 switch (code) { 2417 case lir_add: { 2418 __ incrementl(laddr, c); 2419 break; 2420 } 2421 case lir_sub: { 2422 __ decrementl(laddr, c); 2423 break; 2424 } 2425 default: ShouldNotReachHere(); 2426 } 2427 } else { 2428 ShouldNotReachHere(); 2429 } 2430 2431 } else { 2432 ShouldNotReachHere(); 2433 } 2434 } 2435 2436 void LIR_Assembler::arith_fpu_implementation(LIR_Code code, int left_index, int right_index, int dest_index, bool pop_fpu_stack) { 2437 assert(pop_fpu_stack || (left_index == dest_index || right_index == dest_index), "invalid LIR"); 2438 assert(!pop_fpu_stack || (left_index - 1 == dest_index || right_index - 1 == dest_index), "invalid LIR"); 2439 assert(left_index == 0 || right_index == 0, "either must be on top of stack"); 2440 2441 bool left_is_tos = (left_index == 0); 2442 bool dest_is_tos = (dest_index == 0); 2443 int non_tos_index = (left_is_tos ? right_index : left_index); 2444 2445 switch (code) { 2446 case lir_add: 2447 if (pop_fpu_stack) __ faddp(non_tos_index); 2448 else if (dest_is_tos) __ fadd (non_tos_index); 2449 else __ fadda(non_tos_index); 2450 break; 2451 2452 case lir_sub: 2453 if (left_is_tos) { 2454 if (pop_fpu_stack) __ fsubrp(non_tos_index); 2455 else if (dest_is_tos) __ fsub (non_tos_index); 2456 else __ fsubra(non_tos_index); 2457 } else { 2458 if (pop_fpu_stack) __ fsubp (non_tos_index); 2459 else if (dest_is_tos) __ fsubr (non_tos_index); 2460 else __ fsuba (non_tos_index); 2461 } 2462 break; 2463 2464 case lir_mul_strictfp: // fall through 2465 case lir_mul: 2466 if (pop_fpu_stack) __ fmulp(non_tos_index); 2467 else if (dest_is_tos) __ fmul (non_tos_index); 2468 else __ fmula(non_tos_index); 2469 break; 2470 2471 case lir_div_strictfp: // fall through 2472 case lir_div: 2473 if (left_is_tos) { 2474 if (pop_fpu_stack) __ fdivrp(non_tos_index); 2475 else if (dest_is_tos) __ fdiv (non_tos_index); 2476 else __ fdivra(non_tos_index); 2477 } else { 2478 if (pop_fpu_stack) __ fdivp (non_tos_index); 2479 else if (dest_is_tos) __ fdivr (non_tos_index); 2480 else __ fdiva (non_tos_index); 2481 } 2482 break; 2483 2484 case lir_rem: 2485 assert(left_is_tos && dest_is_tos && right_index == 1, "must be guaranteed by FPU stack allocation"); 2486 __ fremr(noreg); 2487 break; 2488 2489 default: 2490 ShouldNotReachHere(); 2491 } 2492 } 2493 2494 2495 void LIR_Assembler::intrinsic_op(LIR_Code code, LIR_Opr value, LIR_Opr unused, LIR_Opr dest, LIR_Op* op) { 2496 if (value->is_double_xmm()) { 2497 switch(code) { 2498 case lir_abs : 2499 { 2500 if (dest->as_xmm_double_reg() != value->as_xmm_double_reg()) { 2501 __ movdbl(dest->as_xmm_double_reg(), value->as_xmm_double_reg()); 2502 } 2503 __ andpd(dest->as_xmm_double_reg(), 2504 ExternalAddress((address)double_signmask_pool)); 2505 } 2506 break; 2507 2508 case lir_sqrt: __ sqrtsd(dest->as_xmm_double_reg(), value->as_xmm_double_reg()); break; 2509 // all other intrinsics are not available in the SSE instruction set, so FPU is used 2510 default : ShouldNotReachHere(); 2511 } 2512 2513 } else if (value->is_double_fpu()) { 2514 assert(value->fpu_regnrLo() == 0 && dest->fpu_regnrLo() == 0, "both must be on TOS"); 2515 switch(code) { 2516 case lir_log : __ flog() ; break; 2517 case lir_log10 : __ flog10() ; break; 2518 case lir_abs : __ fabs() ; break; 2519 case lir_sqrt : __ fsqrt(); break; 2520 case lir_sin : 2521 // Should consider not saving rbx, if not necessary 2522 __ trigfunc('s', op->as_Op2()->fpu_stack_size()); 2523 break; 2524 case lir_cos : 2525 // Should consider not saving rbx, if not necessary 2526 assert(op->as_Op2()->fpu_stack_size() <= 6, "sin and cos need two free stack slots"); 2527 __ trigfunc('c', op->as_Op2()->fpu_stack_size()); 2528 break; 2529 case lir_tan : 2530 // Should consider not saving rbx, if not necessary 2531 __ trigfunc('t', op->as_Op2()->fpu_stack_size()); 2532 break; 2533 case lir_exp : 2534 __ exp_with_fallback(op->as_Op2()->fpu_stack_size()); 2535 break; 2536 case lir_pow : 2537 __ pow_with_fallback(op->as_Op2()->fpu_stack_size()); 2538 break; 2539 default : ShouldNotReachHere(); 2540 } 2541 } else { 2542 Unimplemented(); 2543 } 2544 } 2545 2546 void LIR_Assembler::logic_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst) { 2547 // assert(left->destroys_register(), "check"); 2548 if (left->is_single_cpu()) { 2549 Register reg = left->as_register(); 2550 if (right->is_constant()) { 2551 int val = right->as_constant_ptr()->as_jint(); 2552 switch (code) { 2553 case lir_logic_and: __ andl (reg, val); break; 2554 case lir_logic_or: __ orl (reg, val); break; 2555 case lir_logic_xor: __ xorl (reg, val); break; 2556 default: ShouldNotReachHere(); 2557 } 2558 } else if (right->is_stack()) { 2559 // added support for stack operands 2560 Address raddr = frame_map()->address_for_slot(right->single_stack_ix()); 2561 switch (code) { 2562 case lir_logic_and: __ andl (reg, raddr); break; 2563 case lir_logic_or: __ orl (reg, raddr); break; 2564 case lir_logic_xor: __ xorl (reg, raddr); break; 2565 default: ShouldNotReachHere(); 2566 } 2567 } else { 2568 Register rright = right->as_register(); 2569 switch (code) { 2570 case lir_logic_and: __ andptr (reg, rright); break; 2571 case lir_logic_or : __ orptr (reg, rright); break; 2572 case lir_logic_xor: __ xorptr (reg, rright); break; 2573 default: ShouldNotReachHere(); 2574 } 2575 } 2576 move_regs(reg, dst->as_register()); 2577 } else { 2578 Register l_lo = left->as_register_lo(); 2579 Register l_hi = left->as_register_hi(); 2580 if (right->is_constant()) { 2581 #ifdef _LP64 2582 __ mov64(rscratch1, right->as_constant_ptr()->as_jlong()); 2583 switch (code) { 2584 case lir_logic_and: 2585 __ andq(l_lo, rscratch1); 2586 break; 2587 case lir_logic_or: 2588 __ orq(l_lo, rscratch1); 2589 break; 2590 case lir_logic_xor: 2591 __ xorq(l_lo, rscratch1); 2592 break; 2593 default: ShouldNotReachHere(); 2594 } 2595 #else 2596 int r_lo = right->as_constant_ptr()->as_jint_lo(); 2597 int r_hi = right->as_constant_ptr()->as_jint_hi(); 2598 switch (code) { 2599 case lir_logic_and: 2600 __ andl(l_lo, r_lo); 2601 __ andl(l_hi, r_hi); 2602 break; 2603 case lir_logic_or: 2604 __ orl(l_lo, r_lo); 2605 __ orl(l_hi, r_hi); 2606 break; 2607 case lir_logic_xor: 2608 __ xorl(l_lo, r_lo); 2609 __ xorl(l_hi, r_hi); 2610 break; 2611 default: ShouldNotReachHere(); 2612 } 2613 #endif // _LP64 2614 } else { 2615 #ifdef _LP64 2616 Register r_lo; 2617 if (right->type() == T_OBJECT || right->type() == T_ARRAY) { 2618 r_lo = right->as_register(); 2619 } else { 2620 r_lo = right->as_register_lo(); 2621 } 2622 #else 2623 Register r_lo = right->as_register_lo(); 2624 Register r_hi = right->as_register_hi(); 2625 assert(l_lo != r_hi, "overwriting registers"); 2626 #endif 2627 switch (code) { 2628 case lir_logic_and: 2629 __ andptr(l_lo, r_lo); 2630 NOT_LP64(__ andptr(l_hi, r_hi);) 2631 break; 2632 case lir_logic_or: 2633 __ orptr(l_lo, r_lo); 2634 NOT_LP64(__ orptr(l_hi, r_hi);) 2635 break; 2636 case lir_logic_xor: 2637 __ xorptr(l_lo, r_lo); 2638 NOT_LP64(__ xorptr(l_hi, r_hi);) 2639 break; 2640 default: ShouldNotReachHere(); 2641 } 2642 } 2643 2644 Register dst_lo = dst->as_register_lo(); 2645 Register dst_hi = dst->as_register_hi(); 2646 2647 #ifdef _LP64 2648 move_regs(l_lo, dst_lo); 2649 #else 2650 if (dst_lo == l_hi) { 2651 assert(dst_hi != l_lo, "overwriting registers"); 2652 move_regs(l_hi, dst_hi); 2653 move_regs(l_lo, dst_lo); 2654 } else { 2655 assert(dst_lo != l_hi, "overwriting registers"); 2656 move_regs(l_lo, dst_lo); 2657 move_regs(l_hi, dst_hi); 2658 } 2659 #endif // _LP64 2660 } 2661 } 2662 2663 2664 // we assume that rax, and rdx can be overwritten 2665 void LIR_Assembler::arithmetic_idiv(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr temp, LIR_Opr result, CodeEmitInfo* info) { 2666 2667 assert(left->is_single_cpu(), "left must be register"); 2668 assert(right->is_single_cpu() || right->is_constant(), "right must be register or constant"); 2669 assert(result->is_single_cpu(), "result must be register"); 2670 2671 // assert(left->destroys_register(), "check"); 2672 // assert(right->destroys_register(), "check"); 2673 2674 Register lreg = left->as_register(); 2675 Register dreg = result->as_register(); 2676 2677 if (right->is_constant()) { 2678 jint divisor = right->as_constant_ptr()->as_jint(); 2679 assert(divisor > 0 && is_power_of_2(divisor), "must be"); 2680 if (code == lir_idiv) { 2681 assert(lreg == rax, "must be rax,"); 2682 assert(temp->as_register() == rdx, "tmp register must be rdx"); 2683 __ cdql(); // sign extend into rdx:rax 2684 if (divisor == 2) { 2685 __ subl(lreg, rdx); 2686 } else { 2687 __ andl(rdx, divisor - 1); 2688 __ addl(lreg, rdx); 2689 } 2690 __ sarl(lreg, log2_jint(divisor)); 2691 move_regs(lreg, dreg); 2692 } else if (code == lir_irem) { 2693 Label done; 2694 __ mov(dreg, lreg); 2695 __ andl(dreg, 0x80000000 | (divisor - 1)); 2696 __ jcc(Assembler::positive, done); 2697 __ decrement(dreg); 2698 __ orl(dreg, ~(divisor - 1)); 2699 __ increment(dreg); 2700 __ bind(done); 2701 } else { 2702 ShouldNotReachHere(); 2703 } 2704 } else { 2705 Register rreg = right->as_register(); 2706 assert(lreg == rax, "left register must be rax,"); 2707 assert(rreg != rdx, "right register must not be rdx"); 2708 assert(temp->as_register() == rdx, "tmp register must be rdx"); 2709 2710 move_regs(lreg, rax); 2711 2712 int idivl_offset = __ corrected_idivl(rreg); 2713 add_debug_info_for_div0(idivl_offset, info); 2714 if (code == lir_irem) { 2715 move_regs(rdx, dreg); // result is in rdx 2716 } else { 2717 move_regs(rax, dreg); 2718 } 2719 } 2720 } 2721 2722 2723 void LIR_Assembler::comp_op(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Op2* op) { 2724 if (opr1->is_single_cpu()) { 2725 Register reg1 = opr1->as_register(); 2726 if (opr2->is_single_cpu()) { 2727 // cpu register - cpu register 2728 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) { 2729 __ cmpptr(reg1, opr2->as_register()); 2730 } else { 2731 assert(opr2->type() != T_OBJECT && opr2->type() != T_ARRAY, "cmp int, oop?"); 2732 __ cmpl(reg1, opr2->as_register()); 2733 } 2734 } else if (opr2->is_stack()) { 2735 // cpu register - stack 2736 if (opr1->type() == T_OBJECT || opr1->type() == T_ARRAY) { 2737 __ cmpptr(reg1, frame_map()->address_for_slot(opr2->single_stack_ix())); 2738 } else { 2739 __ cmpl(reg1, frame_map()->address_for_slot(opr2->single_stack_ix())); 2740 } 2741 } else if (opr2->is_constant()) { 2742 // cpu register - constant 2743 LIR_Const* c = opr2->as_constant_ptr(); 2744 if (c->type() == T_INT) { 2745 __ cmpl(reg1, c->as_jint()); 2746 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) { 2747 // In 64bit oops are single register 2748 jobject o = c->as_jobject(); 2749 if (o == NULL) { 2750 __ cmpptr(reg1, (int32_t)NULL_WORD); 2751 } else { 2752 #ifdef _LP64 2753 __ movoop(rscratch1, o); 2754 __ cmpptr(reg1, rscratch1); 2755 #else 2756 __ cmpoop(reg1, c->as_jobject()); 2757 #endif // _LP64 2758 } 2759 } else { 2760 fatal(err_msg("unexpected type: %s", basictype_to_str(c->type()))); 2761 } 2762 // cpu register - address 2763 } else if (opr2->is_address()) { 2764 if (op->info() != NULL) { 2765 add_debug_info_for_null_check_here(op->info()); 2766 } 2767 __ cmpl(reg1, as_Address(opr2->as_address_ptr())); 2768 } else { 2769 ShouldNotReachHere(); 2770 } 2771 2772 } else if(opr1->is_double_cpu()) { 2773 Register xlo = opr1->as_register_lo(); 2774 Register xhi = opr1->as_register_hi(); 2775 if (opr2->is_double_cpu()) { 2776 #ifdef _LP64 2777 __ cmpptr(xlo, opr2->as_register_lo()); 2778 #else 2779 // cpu register - cpu register 2780 Register ylo = opr2->as_register_lo(); 2781 Register yhi = opr2->as_register_hi(); 2782 __ subl(xlo, ylo); 2783 __ sbbl(xhi, yhi); 2784 if (condition == lir_cond_equal || condition == lir_cond_notEqual) { 2785 __ orl(xhi, xlo); 2786 } 2787 #endif // _LP64 2788 } else if (opr2->is_constant()) { 2789 // cpu register - constant 0 2790 assert(opr2->as_jlong() == (jlong)0, "only handles zero"); 2791 #ifdef _LP64 2792 __ cmpptr(xlo, (int32_t)opr2->as_jlong()); 2793 #else 2794 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "only handles equals case"); 2795 __ orl(xhi, xlo); 2796 #endif // _LP64 2797 } else { 2798 ShouldNotReachHere(); 2799 } 2800 2801 } else if (opr1->is_single_xmm()) { 2802 XMMRegister reg1 = opr1->as_xmm_float_reg(); 2803 if (opr2->is_single_xmm()) { 2804 // xmm register - xmm register 2805 __ ucomiss(reg1, opr2->as_xmm_float_reg()); 2806 } else if (opr2->is_stack()) { 2807 // xmm register - stack 2808 __ ucomiss(reg1, frame_map()->address_for_slot(opr2->single_stack_ix())); 2809 } else if (opr2->is_constant()) { 2810 // xmm register - constant 2811 __ ucomiss(reg1, InternalAddress(float_constant(opr2->as_jfloat()))); 2812 } else if (opr2->is_address()) { 2813 // xmm register - address 2814 if (op->info() != NULL) { 2815 add_debug_info_for_null_check_here(op->info()); 2816 } 2817 __ ucomiss(reg1, as_Address(opr2->as_address_ptr())); 2818 } else { 2819 ShouldNotReachHere(); 2820 } 2821 2822 } else if (opr1->is_double_xmm()) { 2823 XMMRegister reg1 = opr1->as_xmm_double_reg(); 2824 if (opr2->is_double_xmm()) { 2825 // xmm register - xmm register 2826 __ ucomisd(reg1, opr2->as_xmm_double_reg()); 2827 } else if (opr2->is_stack()) { 2828 // xmm register - stack 2829 __ ucomisd(reg1, frame_map()->address_for_slot(opr2->double_stack_ix())); 2830 } else if (opr2->is_constant()) { 2831 // xmm register - constant 2832 __ ucomisd(reg1, InternalAddress(double_constant(opr2->as_jdouble()))); 2833 } else if (opr2->is_address()) { 2834 // xmm register - address 2835 if (op->info() != NULL) { 2836 add_debug_info_for_null_check_here(op->info()); 2837 } 2838 __ ucomisd(reg1, as_Address(opr2->pointer()->as_address())); 2839 } else { 2840 ShouldNotReachHere(); 2841 } 2842 2843 } else if(opr1->is_single_fpu() || opr1->is_double_fpu()) { 2844 assert(opr1->is_fpu_register() && opr1->fpu() == 0, "currently left-hand side must be on TOS (relax this restriction)"); 2845 assert(opr2->is_fpu_register(), "both must be registers"); 2846 __ fcmp(noreg, opr2->fpu(), op->fpu_pop_count() > 0, op->fpu_pop_count() > 1); 2847 2848 } else if (opr1->is_address() && opr2->is_constant()) { 2849 LIR_Const* c = opr2->as_constant_ptr(); 2850 #ifdef _LP64 2851 if (c->type() == T_OBJECT || c->type() == T_ARRAY) { 2852 assert(condition == lir_cond_equal || condition == lir_cond_notEqual, "need to reverse"); 2853 __ movoop(rscratch1, c->as_jobject()); 2854 } 2855 #endif // LP64 2856 if (op->info() != NULL) { 2857 add_debug_info_for_null_check_here(op->info()); 2858 } 2859 // special case: address - constant 2860 LIR_Address* addr = opr1->as_address_ptr(); 2861 if (c->type() == T_INT) { 2862 __ cmpl(as_Address(addr), c->as_jint()); 2863 } else if (c->type() == T_OBJECT || c->type() == T_ARRAY) { 2864 #ifdef _LP64 2865 // %%% Make this explode if addr isn't reachable until we figure out a 2866 // better strategy by giving noreg as the temp for as_Address 2867 __ cmpptr(rscratch1, as_Address(addr, noreg)); 2868 #else 2869 __ cmpoop(as_Address(addr), c->as_jobject()); 2870 #endif // _LP64 2871 } else { 2872 ShouldNotReachHere(); 2873 } 2874 2875 } else { 2876 ShouldNotReachHere(); 2877 } 2878 } 2879 2880 void LIR_Assembler::comp_fl2i(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst, LIR_Op2* op) { 2881 if (code == lir_cmp_fd2i || code == lir_ucmp_fd2i) { 2882 if (left->is_single_xmm()) { 2883 assert(right->is_single_xmm(), "must match"); 2884 __ cmpss2int(left->as_xmm_float_reg(), right->as_xmm_float_reg(), dst->as_register(), code == lir_ucmp_fd2i); 2885 } else if (left->is_double_xmm()) { 2886 assert(right->is_double_xmm(), "must match"); 2887 __ cmpsd2int(left->as_xmm_double_reg(), right->as_xmm_double_reg(), dst->as_register(), code == lir_ucmp_fd2i); 2888 2889 } else { 2890 assert(left->is_single_fpu() || left->is_double_fpu(), "must be"); 2891 assert(right->is_single_fpu() || right->is_double_fpu(), "must match"); 2892 2893 assert(left->fpu() == 0, "left must be on TOS"); 2894 __ fcmp2int(dst->as_register(), code == lir_ucmp_fd2i, right->fpu(), 2895 op->fpu_pop_count() > 0, op->fpu_pop_count() > 1); 2896 } 2897 } else { 2898 assert(code == lir_cmp_l2i, "check"); 2899 #ifdef _LP64 2900 Label done; 2901 Register dest = dst->as_register(); 2902 __ cmpptr(left->as_register_lo(), right->as_register_lo()); 2903 __ movl(dest, -1); 2904 __ jccb(Assembler::less, done); 2905 __ set_byte_if_not_zero(dest); 2906 __ movzbl(dest, dest); 2907 __ bind(done); 2908 #else 2909 __ lcmp2int(left->as_register_hi(), 2910 left->as_register_lo(), 2911 right->as_register_hi(), 2912 right->as_register_lo()); 2913 move_regs(left->as_register_hi(), dst->as_register()); 2914 #endif // _LP64 2915 } 2916 } 2917 2918 2919 void LIR_Assembler::align_call(LIR_Code code) { 2920 if (os::is_MP()) { 2921 // make sure that the displacement word of the call ends up word aligned 2922 int offset = __ offset(); 2923 switch (code) { 2924 case lir_static_call: 2925 case lir_optvirtual_call: 2926 case lir_dynamic_call: 2927 offset += NativeCall::displacement_offset; 2928 break; 2929 case lir_icvirtual_call: 2930 offset += NativeCall::displacement_offset + NativeMovConstReg::instruction_size; 2931 break; 2932 case lir_virtual_call: // currently, sparc-specific for niagara 2933 default: ShouldNotReachHere(); 2934 } 2935 while (offset++ % BytesPerWord != 0) { 2936 __ nop(); 2937 } 2938 } 2939 } 2940 2941 2942 void LIR_Assembler::call(LIR_OpJavaCall* op, relocInfo::relocType rtype) { 2943 assert(!os::is_MP() || (__ offset() + NativeCall::displacement_offset) % BytesPerWord == 0, 2944 "must be aligned"); 2945 __ call(AddressLiteral(op->addr(), rtype)); 2946 add_call_info(code_offset(), op->info()); 2947 } 2948 2949 2950 void LIR_Assembler::ic_call(LIR_OpJavaCall* op) { 2951 __ ic_call(op->addr()); 2952 add_call_info(code_offset(), op->info()); 2953 assert(!os::is_MP() || 2954 (__ offset() - NativeCall::instruction_size + NativeCall::displacement_offset) % BytesPerWord == 0, 2955 "must be aligned"); 2956 } 2957 2958 2959 /* Currently, vtable-dispatch is only enabled for sparc platforms */ 2960 void LIR_Assembler::vtable_call(LIR_OpJavaCall* op) { 2961 ShouldNotReachHere(); 2962 } 2963 2964 2965 void LIR_Assembler::emit_static_call_stub() { 2966 address call_pc = __ pc(); 2967 address stub = __ start_a_stub(call_stub_size); 2968 if (stub == NULL) { 2969 bailout("static call stub overflow"); 2970 return; 2971 } 2972 2973 int start = __ offset(); 2974 if (os::is_MP()) { 2975 // make sure that the displacement word of the call ends up word aligned 2976 int offset = __ offset() + NativeMovConstReg::instruction_size + NativeCall::displacement_offset; 2977 while (offset++ % BytesPerWord != 0) { 2978 __ nop(); 2979 } 2980 } 2981 __ relocate(static_stub_Relocation::spec(call_pc)); 2982 __ mov_metadata(rbx, (Metadata*)NULL); 2983 // must be set to -1 at code generation time 2984 assert(!os::is_MP() || ((__ offset() + 1) % BytesPerWord) == 0, "must be aligned on MP"); 2985 // On 64bit this will die since it will take a movq & jmp, must be only a jmp 2986 __ jump(RuntimeAddress(__ pc())); 2987 2988 assert(__ offset() - start <= call_stub_size, "stub too big"); 2989 __ end_a_stub(); 2990 } 2991 2992 2993 void LIR_Assembler::throw_op(LIR_Opr exceptionPC, LIR_Opr exceptionOop, CodeEmitInfo* info) { 2994 assert(exceptionOop->as_register() == rax, "must match"); 2995 assert(exceptionPC->as_register() == rdx, "must match"); 2996 2997 // exception object is not added to oop map by LinearScan 2998 // (LinearScan assumes that no oops are in fixed registers) 2999 info->add_register_oop(exceptionOop); 3000 Runtime1::StubID unwind_id; 3001 3002 // get current pc information 3003 // pc is only needed if the method has an exception handler, the unwind code does not need it. 3004 int pc_for_athrow_offset = __ offset(); 3005 InternalAddress pc_for_athrow(__ pc()); 3006 __ lea(exceptionPC->as_register(), pc_for_athrow); 3007 add_call_info(pc_for_athrow_offset, info); // for exception handler 3008 3009 __ verify_not_null_oop(rax); 3010 // search an exception handler (rax: exception oop, rdx: throwing pc) 3011 if (compilation()->has_fpu_code()) { 3012 unwind_id = Runtime1::handle_exception_id; 3013 } else { 3014 unwind_id = Runtime1::handle_exception_nofpu_id; 3015 } 3016 __ call(RuntimeAddress(Runtime1::entry_for(unwind_id))); 3017 3018 // enough room for two byte trap 3019 __ nop(); 3020 } 3021 3022 3023 void LIR_Assembler::unwind_op(LIR_Opr exceptionOop) { 3024 assert(exceptionOop->as_register() == rax, "must match"); 3025 3026 __ jmp(_unwind_handler_entry); 3027 } 3028 3029 3030 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, LIR_Opr count, LIR_Opr dest, LIR_Opr tmp) { 3031 3032 // optimized version for linear scan: 3033 // * count must be already in ECX (guaranteed by LinearScan) 3034 // * left and dest must be equal 3035 // * tmp must be unused 3036 assert(count->as_register() == SHIFT_count, "count must be in ECX"); 3037 assert(left == dest, "left and dest must be equal"); 3038 assert(tmp->is_illegal(), "wasting a register if tmp is allocated"); 3039 3040 if (left->is_single_cpu()) { 3041 Register value = left->as_register(); 3042 assert(value != SHIFT_count, "left cannot be ECX"); 3043 3044 switch (code) { 3045 case lir_shl: __ shll(value); break; 3046 case lir_shr: __ sarl(value); break; 3047 case lir_ushr: __ shrl(value); break; 3048 default: ShouldNotReachHere(); 3049 } 3050 } else if (left->is_double_cpu()) { 3051 Register lo = left->as_register_lo(); 3052 Register hi = left->as_register_hi(); 3053 assert(lo != SHIFT_count && hi != SHIFT_count, "left cannot be ECX"); 3054 #ifdef _LP64 3055 switch (code) { 3056 case lir_shl: __ shlptr(lo); break; 3057 case lir_shr: __ sarptr(lo); break; 3058 case lir_ushr: __ shrptr(lo); break; 3059 default: ShouldNotReachHere(); 3060 } 3061 #else 3062 3063 switch (code) { 3064 case lir_shl: __ lshl(hi, lo); break; 3065 case lir_shr: __ lshr(hi, lo, true); break; 3066 case lir_ushr: __ lshr(hi, lo, false); break; 3067 default: ShouldNotReachHere(); 3068 } 3069 #endif // LP64 3070 } else { 3071 ShouldNotReachHere(); 3072 } 3073 } 3074 3075 3076 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, jint count, LIR_Opr dest) { 3077 if (dest->is_single_cpu()) { 3078 // first move left into dest so that left is not destroyed by the shift 3079 Register value = dest->as_register(); 3080 count = count & 0x1F; // Java spec 3081 3082 move_regs(left->as_register(), value); 3083 switch (code) { 3084 case lir_shl: __ shll(value, count); break; 3085 case lir_shr: __ sarl(value, count); break; 3086 case lir_ushr: __ shrl(value, count); break; 3087 default: ShouldNotReachHere(); 3088 } 3089 } else if (dest->is_double_cpu()) { 3090 #ifndef _LP64 3091 Unimplemented(); 3092 #else 3093 // first move left into dest so that left is not destroyed by the shift 3094 Register value = dest->as_register_lo(); 3095 count = count & 0x1F; // Java spec 3096 3097 move_regs(left->as_register_lo(), value); 3098 switch (code) { 3099 case lir_shl: __ shlptr(value, count); break; 3100 case lir_shr: __ sarptr(value, count); break; 3101 case lir_ushr: __ shrptr(value, count); break; 3102 default: ShouldNotReachHere(); 3103 } 3104 #endif // _LP64 3105 } else { 3106 ShouldNotReachHere(); 3107 } 3108 } 3109 3110 3111 void LIR_Assembler::store_parameter(Register r, int offset_from_rsp_in_words) { 3112 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 3113 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 3114 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 3115 __ movptr (Address(rsp, offset_from_rsp_in_bytes), r); 3116 } 3117 3118 3119 void LIR_Assembler::store_parameter(jint c, int offset_from_rsp_in_words) { 3120 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 3121 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 3122 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 3123 __ movptr (Address(rsp, offset_from_rsp_in_bytes), c); 3124 } 3125 3126 3127 void LIR_Assembler::store_parameter(jobject o, int offset_from_rsp_in_words) { 3128 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp"); 3129 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord; 3130 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset"); 3131 __ movoop (Address(rsp, offset_from_rsp_in_bytes), o); 3132 } 3133 3134 3135 // This code replaces a call to arraycopy; no exception may 3136 // be thrown in this code, they must be thrown in the System.arraycopy 3137 // activation frame; we could save some checks if this would not be the case 3138 void LIR_Assembler::emit_arraycopy(LIR_OpArrayCopy* op) { 3139 ciArrayKlass* default_type = op->expected_type(); 3140 Register src = op->src()->as_register(); 3141 Register dst = op->dst()->as_register(); 3142 Register src_pos = op->src_pos()->as_register(); 3143 Register dst_pos = op->dst_pos()->as_register(); 3144 Register length = op->length()->as_register(); 3145 Register tmp = op->tmp()->as_register(); 3146 3147 CodeStub* stub = op->stub(); 3148 int flags = op->flags(); 3149 BasicType basic_type = default_type != NULL ? default_type->element_type()->basic_type() : T_ILLEGAL; 3150 if (basic_type == T_ARRAY) basic_type = T_OBJECT; 3151 3152 // if we don't know anything, just go through the generic arraycopy 3153 if (default_type == NULL) { 3154 Label done; 3155 // save outgoing arguments on stack in case call to System.arraycopy is needed 3156 // HACK ALERT. This code used to push the parameters in a hardwired fashion 3157 // for interpreter calling conventions. Now we have to do it in new style conventions. 3158 // For the moment until C1 gets the new register allocator I just force all the 3159 // args to the right place (except the register args) and then on the back side 3160 // reload the register args properly if we go slow path. Yuck 3161 3162 // These are proper for the calling convention 3163 store_parameter(length, 2); 3164 store_parameter(dst_pos, 1); 3165 store_parameter(dst, 0); 3166 3167 // these are just temporary placements until we need to reload 3168 store_parameter(src_pos, 3); 3169 store_parameter(src, 4); 3170 NOT_LP64(assert(src == rcx && src_pos == rdx, "mismatch in calling convention");) 3171 3172 address C_entry = CAST_FROM_FN_PTR(address, Runtime1::arraycopy); 3173 3174 address copyfunc_addr = StubRoutines::generic_arraycopy(); 3175 3176 // pass arguments: may push as this is not a safepoint; SP must be fix at each safepoint 3177 #ifdef _LP64 3178 // The arguments are in java calling convention so we can trivially shift them to C 3179 // convention 3180 assert_different_registers(c_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4); 3181 __ mov(c_rarg0, j_rarg0); 3182 assert_different_registers(c_rarg1, j_rarg2, j_rarg3, j_rarg4); 3183 __ mov(c_rarg1, j_rarg1); 3184 assert_different_registers(c_rarg2, j_rarg3, j_rarg4); 3185 __ mov(c_rarg2, j_rarg2); 3186 assert_different_registers(c_rarg3, j_rarg4); 3187 __ mov(c_rarg3, j_rarg3); 3188 #ifdef _WIN64 3189 // Allocate abi space for args but be sure to keep stack aligned 3190 __ subptr(rsp, 6*wordSize); 3191 store_parameter(j_rarg4, 4); 3192 if (copyfunc_addr == NULL) { // Use C version if stub was not generated 3193 __ call(RuntimeAddress(C_entry)); 3194 } else { 3195 #ifndef PRODUCT 3196 if (PrintC1Statistics) { 3197 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt)); 3198 } 3199 #endif // PRODUCT 3200 __ call(RuntimeAddress(copyfunc_addr)); 3201 } 3202 __ addptr(rsp, 6*wordSize); 3203 #else // 3204 __ mov(c_rarg4, j_rarg4); 3205 if (copyfunc_addr == NULL) { // Use C version if stub was not generated 3206 __ call(RuntimeAddress(C_entry)); 3207 } else { 3208 #ifndef PRODUCT 3209 if (PrintC1Statistics) { 3210 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt)); 3211 } 3212 #endif 3213 __ call(RuntimeAddress(copyfunc_addr)); 3214 } 3215 #endif // _WIN64 3216 #else 3217 __ push(length); 3218 __ push(dst_pos); 3219 __ push(dst); 3220 __ push(src_pos); 3221 __ push(src); 3222 3223 if (copyfunc_addr == NULL) { // Use C version if stub was not generated 3224 __ call_VM_leaf(C_entry, 5); // removes pushed parameter from the stack 3225 } else { 3226 #ifndef PRODUCT 3227 if (PrintC1Statistics) { 3228 __ incrementl(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt)); 3229 } 3230 #endif 3231 __ call_VM_leaf(copyfunc_addr, 5); // removes pushed parameter from the stack 3232 } 3233 3234 #endif // _LP64 3235 3236 __ cmpl(rax, 0); 3237 __ jcc(Assembler::equal, *stub->continuation()); 3238 3239 if (copyfunc_addr != NULL) { 3240 __ mov(tmp, rax); 3241 __ xorl(tmp, -1); 3242 } 3243 3244 // Reload values from the stack so they are where the stub 3245 // expects them. 3246 __ movptr (dst, Address(rsp, 0*BytesPerWord)); 3247 __ movptr (dst_pos, Address(rsp, 1*BytesPerWord)); 3248 __ movptr (length, Address(rsp, 2*BytesPerWord)); 3249 __ movptr (src_pos, Address(rsp, 3*BytesPerWord)); 3250 __ movptr (src, Address(rsp, 4*BytesPerWord)); 3251 3252 if (copyfunc_addr != NULL) { 3253 __ subl(length, tmp); 3254 __ addl(src_pos, tmp); 3255 __ addl(dst_pos, tmp); 3256 } 3257 __ jmp(*stub->entry()); 3258 3259 __ bind(*stub->continuation()); 3260 return; 3261 } 3262 3263 assert(default_type != NULL && default_type->is_array_klass() && default_type->is_loaded(), "must be true at this point"); 3264 3265 int elem_size = type2aelembytes(basic_type); 3266 Address::ScaleFactor scale; 3267 3268 switch (elem_size) { 3269 case 1 : 3270 scale = Address::times_1; 3271 break; 3272 case 2 : 3273 scale = Address::times_2; 3274 break; 3275 case 4 : 3276 scale = Address::times_4; 3277 break; 3278 case 8 : 3279 scale = Address::times_8; 3280 break; 3281 default: 3282 scale = Address::no_scale; 3283 ShouldNotReachHere(); 3284 } 3285 3286 Address src_length_addr = Address(src, arrayOopDesc::length_offset_in_bytes()); 3287 Address dst_length_addr = Address(dst, arrayOopDesc::length_offset_in_bytes()); 3288 Address src_klass_addr = Address(src, oopDesc::klass_offset_in_bytes()); 3289 Address dst_klass_addr = Address(dst, oopDesc::klass_offset_in_bytes()); 3290 3291 // length and pos's are all sign extended at this point on 64bit 3292 3293 // test for NULL 3294 if (flags & LIR_OpArrayCopy::src_null_check) { 3295 __ testptr(src, src); 3296 __ jcc(Assembler::zero, *stub->entry()); 3297 } 3298 if (flags & LIR_OpArrayCopy::dst_null_check) { 3299 __ testptr(dst, dst); 3300 __ jcc(Assembler::zero, *stub->entry()); 3301 } 3302 3303 // If the compiler was not able to prove that exact type of the source or the destination 3304 // of the arraycopy is an array type, check at runtime if the source or the destination is 3305 // an instance type. 3306 if (flags & LIR_OpArrayCopy::type_check) { 3307 if (!(flags & LIR_OpArrayCopy::dst_objarray)) { 3308 __ load_klass(tmp, dst); 3309 __ cmpl(Address(tmp, in_bytes(Klass::layout_helper_offset())), Klass::_lh_neutral_value); 3310 __ jcc(Assembler::greaterEqual, *stub->entry()); 3311 } 3312 3313 if (!(flags & LIR_OpArrayCopy::src_objarray)) { 3314 __ load_klass(tmp, src); 3315 __ cmpl(Address(tmp, in_bytes(Klass::layout_helper_offset())), Klass::_lh_neutral_value); 3316 __ jcc(Assembler::greaterEqual, *stub->entry()); 3317 } 3318 } 3319 3320 // check if negative 3321 if (flags & LIR_OpArrayCopy::src_pos_positive_check) { 3322 __ testl(src_pos, src_pos); 3323 __ jcc(Assembler::less, *stub->entry()); 3324 } 3325 if (flags & LIR_OpArrayCopy::dst_pos_positive_check) { 3326 __ testl(dst_pos, dst_pos); 3327 __ jcc(Assembler::less, *stub->entry()); 3328 } 3329 3330 if (flags & LIR_OpArrayCopy::src_range_check) { 3331 __ lea(tmp, Address(src_pos, length, Address::times_1, 0)); 3332 __ cmpl(tmp, src_length_addr); 3333 __ jcc(Assembler::above, *stub->entry()); 3334 } 3335 if (flags & LIR_OpArrayCopy::dst_range_check) { 3336 __ lea(tmp, Address(dst_pos, length, Address::times_1, 0)); 3337 __ cmpl(tmp, dst_length_addr); 3338 __ jcc(Assembler::above, *stub->entry()); 3339 } 3340 3341 if (flags & LIR_OpArrayCopy::length_positive_check) { 3342 __ testl(length, length); 3343 __ jcc(Assembler::less, *stub->entry()); 3344 __ jcc(Assembler::zero, *stub->continuation()); 3345 } 3346 3347 #ifdef _LP64 3348 __ movl2ptr(src_pos, src_pos); //higher 32bits must be null 3349 __ movl2ptr(dst_pos, dst_pos); //higher 32bits must be null 3350 #endif 3351 3352 if (flags & LIR_OpArrayCopy::type_check) { 3353 // We don't know the array types are compatible 3354 if (basic_type != T_OBJECT) { 3355 // Simple test for basic type arrays 3356 if (UseCompressedClassPointers) { 3357 __ movl(tmp, src_klass_addr); 3358 __ cmpl(tmp, dst_klass_addr); 3359 } else { 3360 __ movptr(tmp, src_klass_addr); 3361 __ cmpptr(tmp, dst_klass_addr); 3362 } 3363 __ jcc(Assembler::notEqual, *stub->entry()); 3364 } else { 3365 // For object arrays, if src is a sub class of dst then we can 3366 // safely do the copy. 3367 Label cont, slow; 3368 3369 __ push(src); 3370 __ push(dst); 3371 3372 __ load_klass(src, src); 3373 __ load_klass(dst, dst); 3374 3375 __ check_klass_subtype_fast_path(src, dst, tmp, &cont, &slow, NULL); 3376 3377 __ push(src); 3378 __ push(dst); 3379 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id))); 3380 __ pop(dst); 3381 __ pop(src); 3382 3383 __ cmpl(src, 0); 3384 __ jcc(Assembler::notEqual, cont); 3385 3386 __ bind(slow); 3387 __ pop(dst); 3388 __ pop(src); 3389 3390 address copyfunc_addr = StubRoutines::checkcast_arraycopy(); 3391 if (copyfunc_addr != NULL) { // use stub if available 3392 // src is not a sub class of dst so we have to do a 3393 // per-element check. 3394 3395 int mask = LIR_OpArrayCopy::src_objarray|LIR_OpArrayCopy::dst_objarray; 3396 if ((flags & mask) != mask) { 3397 // Check that at least both of them object arrays. 3398 assert(flags & mask, "one of the two should be known to be an object array"); 3399 3400 if (!(flags & LIR_OpArrayCopy::src_objarray)) { 3401 __ load_klass(tmp, src); 3402 } else if (!(flags & LIR_OpArrayCopy::dst_objarray)) { 3403 __ load_klass(tmp, dst); 3404 } 3405 int lh_offset = in_bytes(Klass::layout_helper_offset()); 3406 Address klass_lh_addr(tmp, lh_offset); 3407 jint objArray_lh = Klass::array_layout_helper(T_OBJECT); 3408 __ cmpl(klass_lh_addr, objArray_lh); 3409 __ jcc(Assembler::notEqual, *stub->entry()); 3410 } 3411 3412 // Spill because stubs can use any register they like and it's 3413 // easier to restore just those that we care about. 3414 store_parameter(dst, 0); 3415 store_parameter(dst_pos, 1); 3416 store_parameter(length, 2); 3417 store_parameter(src_pos, 3); 3418 store_parameter(src, 4); 3419 3420 #ifndef _LP64 3421 __ movptr(tmp, dst_klass_addr); 3422 __ movptr(tmp, Address(tmp, ObjArrayKlass::element_klass_offset())); 3423 __ push(tmp); 3424 __ movl(tmp, Address(tmp, Klass::super_check_offset_offset())); 3425 __ push(tmp); 3426 __ push(length); 3427 __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3428 __ push(tmp); 3429 __ lea(tmp, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3430 __ push(tmp); 3431 3432 __ call_VM_leaf(copyfunc_addr, 5); 3433 #else 3434 __ movl2ptr(length, length); //higher 32bits must be null 3435 3436 __ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3437 assert_different_registers(c_rarg0, dst, dst_pos, length); 3438 __ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3439 assert_different_registers(c_rarg1, dst, length); 3440 3441 __ mov(c_rarg2, length); 3442 assert_different_registers(c_rarg2, dst); 3443 3444 #ifdef _WIN64 3445 // Allocate abi space for args but be sure to keep stack aligned 3446 __ subptr(rsp, 6*wordSize); 3447 __ load_klass(c_rarg3, dst); 3448 __ movptr(c_rarg3, Address(c_rarg3, ObjArrayKlass::element_klass_offset())); 3449 store_parameter(c_rarg3, 4); 3450 __ movl(c_rarg3, Address(c_rarg3, Klass::super_check_offset_offset())); 3451 __ call(RuntimeAddress(copyfunc_addr)); 3452 __ addptr(rsp, 6*wordSize); 3453 #else 3454 __ load_klass(c_rarg4, dst); 3455 __ movptr(c_rarg4, Address(c_rarg4, ObjArrayKlass::element_klass_offset())); 3456 __ movl(c_rarg3, Address(c_rarg4, Klass::super_check_offset_offset())); 3457 __ call(RuntimeAddress(copyfunc_addr)); 3458 #endif 3459 3460 #endif 3461 3462 #ifndef PRODUCT 3463 if (PrintC1Statistics) { 3464 Label failed; 3465 __ testl(rax, rax); 3466 __ jcc(Assembler::notZero, failed); 3467 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_cnt)); 3468 __ bind(failed); 3469 } 3470 #endif 3471 3472 __ testl(rax, rax); 3473 __ jcc(Assembler::zero, *stub->continuation()); 3474 3475 #ifndef PRODUCT 3476 if (PrintC1Statistics) { 3477 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_attempt_cnt)); 3478 } 3479 #endif 3480 3481 __ mov(tmp, rax); 3482 3483 __ xorl(tmp, -1); 3484 3485 // Restore previously spilled arguments 3486 __ movptr (dst, Address(rsp, 0*BytesPerWord)); 3487 __ movptr (dst_pos, Address(rsp, 1*BytesPerWord)); 3488 __ movptr (length, Address(rsp, 2*BytesPerWord)); 3489 __ movptr (src_pos, Address(rsp, 3*BytesPerWord)); 3490 __ movptr (src, Address(rsp, 4*BytesPerWord)); 3491 3492 3493 __ subl(length, tmp); 3494 __ addl(src_pos, tmp); 3495 __ addl(dst_pos, tmp); 3496 } 3497 3498 __ jmp(*stub->entry()); 3499 3500 __ bind(cont); 3501 __ pop(dst); 3502 __ pop(src); 3503 } 3504 } 3505 3506 #ifdef ASSERT 3507 if (basic_type != T_OBJECT || !(flags & LIR_OpArrayCopy::type_check)) { 3508 // Sanity check the known type with the incoming class. For the 3509 // primitive case the types must match exactly with src.klass and 3510 // dst.klass each exactly matching the default type. For the 3511 // object array case, if no type check is needed then either the 3512 // dst type is exactly the expected type and the src type is a 3513 // subtype which we can't check or src is the same array as dst 3514 // but not necessarily exactly of type default_type. 3515 Label known_ok, halt; 3516 __ mov_metadata(tmp, default_type->constant_encoding()); 3517 #ifdef _LP64 3518 if (UseCompressedClassPointers) { 3519 __ encode_klass_not_null(tmp); 3520 } 3521 #endif 3522 3523 if (basic_type != T_OBJECT) { 3524 3525 if (UseCompressedClassPointers) __ cmpl(tmp, dst_klass_addr); 3526 else __ cmpptr(tmp, dst_klass_addr); 3527 __ jcc(Assembler::notEqual, halt); 3528 if (UseCompressedClassPointers) __ cmpl(tmp, src_klass_addr); 3529 else __ cmpptr(tmp, src_klass_addr); 3530 __ jcc(Assembler::equal, known_ok); 3531 } else { 3532 if (UseCompressedClassPointers) __ cmpl(tmp, dst_klass_addr); 3533 else __ cmpptr(tmp, dst_klass_addr); 3534 __ jcc(Assembler::equal, known_ok); 3535 __ cmpptr(src, dst); 3536 __ jcc(Assembler::equal, known_ok); 3537 } 3538 __ bind(halt); 3539 __ stop("incorrect type information in arraycopy"); 3540 __ bind(known_ok); 3541 } 3542 #endif 3543 3544 #ifndef PRODUCT 3545 if (PrintC1Statistics) { 3546 __ incrementl(ExternalAddress(Runtime1::arraycopy_count_address(basic_type))); 3547 } 3548 #endif 3549 3550 #ifdef _LP64 3551 assert_different_registers(c_rarg0, dst, dst_pos, length); 3552 __ lea(c_rarg0, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3553 assert_different_registers(c_rarg1, length); 3554 __ lea(c_rarg1, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3555 __ mov(c_rarg2, length); 3556 3557 #else 3558 __ lea(tmp, Address(src, src_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3559 store_parameter(tmp, 0); 3560 __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type))); 3561 store_parameter(tmp, 1); 3562 store_parameter(length, 2); 3563 #endif // _LP64 3564 3565 bool disjoint = (flags & LIR_OpArrayCopy::overlapping) == 0; 3566 bool aligned = (flags & LIR_OpArrayCopy::unaligned) == 0; 3567 const char *name; 3568 address entry = StubRoutines::select_arraycopy_function(basic_type, aligned, disjoint, name, false); 3569 __ call_VM_leaf(entry, 0); 3570 3571 __ bind(*stub->continuation()); 3572 } 3573 3574 void LIR_Assembler::emit_updatecrc32(LIR_OpUpdateCRC32* op) { 3575 assert(op->crc()->is_single_cpu(), "crc must be register"); 3576 assert(op->val()->is_single_cpu(), "byte value must be register"); 3577 assert(op->result_opr()->is_single_cpu(), "result must be register"); 3578 Register crc = op->crc()->as_register(); 3579 Register val = op->val()->as_register(); 3580 Register res = op->result_opr()->as_register(); 3581 3582 assert_different_registers(val, crc, res); 3583 3584 __ lea(res, ExternalAddress(StubRoutines::crc_table_addr())); 3585 __ notl(crc); // ~crc 3586 __ update_byte_crc32(crc, val, res); 3587 __ notl(crc); // ~crc 3588 __ mov(res, crc); 3589 } 3590 3591 void LIR_Assembler::emit_lock(LIR_OpLock* op) { 3592 Register obj = op->obj_opr()->as_register(); // may not be an oop 3593 Register hdr = op->hdr_opr()->as_register(); 3594 Register lock = op->lock_opr()->as_register(); 3595 if (!UseFastLocking) { 3596 __ jmp(*op->stub()->entry()); 3597 } else if (op->code() == lir_lock) { 3598 Register scratch = noreg; 3599 if (UseBiasedLocking) { 3600 scratch = op->scratch_opr()->as_register(); 3601 } 3602 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header"); 3603 // add debug info for NullPointerException only if one is possible 3604 int null_check_offset = __ lock_object(hdr, obj, lock, scratch, *op->stub()->entry()); 3605 if (op->info() != NULL) { 3606 add_debug_info_for_null_check(null_check_offset, op->info()); 3607 } 3608 // done 3609 } else if (op->code() == lir_unlock) { 3610 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header"); 3611 __ unlock_object(hdr, obj, lock, *op->stub()->entry()); 3612 } else { 3613 Unimplemented(); 3614 } 3615 __ bind(*op->stub()->continuation()); 3616 } 3617 3618 3619 void LIR_Assembler::emit_profile_call(LIR_OpProfileCall* op) { 3620 ciMethod* method = op->profiled_method(); 3621 int bci = op->profiled_bci(); 3622 ciMethod* callee = op->profiled_callee(); 3623 3624 // Update counter for all call types 3625 ciMethodData* md = method->method_data_or_null(); 3626 assert(md != NULL, "Sanity"); 3627 ciProfileData* data = md->bci_to_data(bci); 3628 assert(data->is_CounterData(), "need CounterData for calls"); 3629 assert(op->mdo()->is_single_cpu(), "mdo must be allocated"); 3630 Register mdo = op->mdo()->as_register(); 3631 __ mov_metadata(mdo, md->constant_encoding()); 3632 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset())); 3633 Bytecodes::Code bc = method->java_code_at_bci(bci); 3634 const bool callee_is_static = callee->is_loaded() && callee->is_static(); 3635 // Perform additional virtual call profiling for invokevirtual and 3636 // invokeinterface bytecodes 3637 if ((bc == Bytecodes::_invokevirtual || bc == Bytecodes::_invokeinterface) && 3638 !callee_is_static && // required for optimized MH invokes 3639 C1ProfileVirtualCalls) { 3640 assert(op->recv()->is_single_cpu(), "recv must be allocated"); 3641 Register recv = op->recv()->as_register(); 3642 assert_different_registers(mdo, recv); 3643 assert(data->is_VirtualCallData(), "need VirtualCallData for virtual calls"); 3644 ciKlass* known_klass = op->known_holder(); 3645 if (C1OptimizeVirtualCallProfiling && known_klass != NULL) { 3646 // We know the type that will be seen at this call site; we can 3647 // statically update the MethodData* rather than needing to do 3648 // dynamic tests on the receiver type 3649 3650 // NOTE: we should probably put a lock around this search to 3651 // avoid collisions by concurrent compilations 3652 ciVirtualCallData* vc_data = (ciVirtualCallData*) data; 3653 uint i; 3654 for (i = 0; i < VirtualCallData::row_limit(); i++) { 3655 ciKlass* receiver = vc_data->receiver(i); 3656 if (known_klass->equals(receiver)) { 3657 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i))); 3658 __ addptr(data_addr, DataLayout::counter_increment); 3659 return; 3660 } 3661 } 3662 3663 // Receiver type not found in profile data; select an empty slot 3664 3665 // Note that this is less efficient than it should be because it 3666 // always does a write to the receiver part of the 3667 // VirtualCallData rather than just the first time 3668 for (i = 0; i < VirtualCallData::row_limit(); i++) { 3669 ciKlass* receiver = vc_data->receiver(i); 3670 if (receiver == NULL) { 3671 Address recv_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_offset(i))); 3672 __ mov_metadata(recv_addr, known_klass->constant_encoding()); 3673 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i))); 3674 __ addptr(data_addr, DataLayout::counter_increment); 3675 return; 3676 } 3677 } 3678 } else { 3679 __ load_klass(recv, recv); 3680 Label update_done; 3681 type_profile_helper(mdo, md, data, recv, &update_done); 3682 // Receiver did not match any saved receiver and there is no empty row for it. 3683 // Increment total counter to indicate polymorphic case. 3684 __ addptr(counter_addr, DataLayout::counter_increment); 3685 3686 __ bind(update_done); 3687 } 3688 } else { 3689 // Static call 3690 __ addptr(counter_addr, DataLayout::counter_increment); 3691 } 3692 } 3693 3694 void LIR_Assembler::emit_profile_type(LIR_OpProfileType* op) { 3695 Register obj = op->obj()->as_register(); 3696 Register tmp = op->tmp()->as_pointer_register(); 3697 Address mdo_addr = as_Address(op->mdp()->as_address_ptr()); 3698 ciKlass* exact_klass = op->exact_klass(); 3699 intptr_t current_klass = op->current_klass(); 3700 bool not_null = op->not_null(); 3701 bool no_conflict = op->no_conflict(); 3702 3703 Label update, next, none; 3704 3705 bool do_null = !not_null; 3706 bool exact_klass_set = exact_klass != NULL && ciTypeEntries::valid_ciklass(current_klass) == exact_klass; 3707 bool do_update = !TypeEntries::is_type_unknown(current_klass) && !exact_klass_set; 3708 3709 assert(do_null || do_update, "why are we here?"); 3710 assert(!TypeEntries::was_null_seen(current_klass) || do_update, "why are we here?"); 3711 3712 __ verify_oop(obj); 3713 3714 if (tmp != obj) { 3715 __ mov(tmp, obj); 3716 } 3717 if (do_null) { 3718 __ testptr(tmp, tmp); 3719 __ jccb(Assembler::notZero, update); 3720 if (!TypeEntries::was_null_seen(current_klass)) { 3721 __ orptr(mdo_addr, TypeEntries::null_seen); 3722 } 3723 if (do_update) { 3724 #ifndef ASSERT 3725 __ jmpb(next); 3726 } 3727 #else 3728 __ jmp(next); 3729 } 3730 } else { 3731 __ testptr(tmp, tmp); 3732 __ jccb(Assembler::notZero, update); 3733 __ stop("unexpect null obj"); 3734 #endif 3735 } 3736 3737 __ bind(update); 3738 3739 if (do_update) { 3740 #ifdef ASSERT 3741 if (exact_klass != NULL) { 3742 Label ok; 3743 __ load_klass(tmp, tmp); 3744 __ push(tmp); 3745 __ mov_metadata(tmp, exact_klass->constant_encoding()); 3746 __ cmpptr(tmp, Address(rsp, 0)); 3747 __ jccb(Assembler::equal, ok); 3748 __ stop("exact klass and actual klass differ"); 3749 __ bind(ok); 3750 __ pop(tmp); 3751 } 3752 #endif 3753 if (!no_conflict) { 3754 if (exact_klass == NULL || TypeEntries::is_type_none(current_klass)) { 3755 if (exact_klass != NULL) { 3756 __ mov_metadata(tmp, exact_klass->constant_encoding()); 3757 } else { 3758 __ load_klass(tmp, tmp); 3759 } 3760 3761 __ xorptr(tmp, mdo_addr); 3762 __ testptr(tmp, TypeEntries::type_klass_mask); 3763 // klass seen before, nothing to do. The unknown bit may have been 3764 // set already but no need to check. 3765 __ jccb(Assembler::zero, next); 3766 3767 __ testptr(tmp, TypeEntries::type_unknown); 3768 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore. 3769 3770 if (TypeEntries::is_type_none(current_klass)) { 3771 __ cmpptr(mdo_addr, 0); 3772 __ jccb(Assembler::equal, none); 3773 __ cmpptr(mdo_addr, TypeEntries::null_seen); 3774 __ jccb(Assembler::equal, none); 3775 // There is a chance that the checks above (re-reading profiling 3776 // data from memory) fail if another thread has just set the 3777 // profiling to this obj's klass 3778 __ xorptr(tmp, mdo_addr); 3779 __ testptr(tmp, TypeEntries::type_klass_mask); 3780 __ jccb(Assembler::zero, next); 3781 } 3782 } else { 3783 assert(ciTypeEntries::valid_ciklass(current_klass) != NULL && 3784 ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "conflict only"); 3785 3786 __ movptr(tmp, mdo_addr); 3787 __ testptr(tmp, TypeEntries::type_unknown); 3788 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore. 3789 } 3790 3791 // different than before. Cannot keep accurate profile. 3792 __ orptr(mdo_addr, TypeEntries::type_unknown); 3793 3794 if (TypeEntries::is_type_none(current_klass)) { 3795 __ jmpb(next); 3796 3797 __ bind(none); 3798 // first time here. Set profile type. 3799 __ movptr(mdo_addr, tmp); 3800 } 3801 } else { 3802 // There's a single possible klass at this profile point 3803 assert(exact_klass != NULL, "should be"); 3804 if (TypeEntries::is_type_none(current_klass)) { 3805 __ mov_metadata(tmp, exact_klass->constant_encoding()); 3806 __ xorptr(tmp, mdo_addr); 3807 __ testptr(tmp, TypeEntries::type_klass_mask); 3808 #ifdef ASSERT 3809 __ jcc(Assembler::zero, next); 3810 3811 { 3812 Label ok; 3813 __ push(tmp); 3814 __ cmpptr(mdo_addr, 0); 3815 __ jcc(Assembler::equal, ok); 3816 __ cmpptr(mdo_addr, TypeEntries::null_seen); 3817 __ jcc(Assembler::equal, ok); 3818 // may have been set by another thread 3819 __ mov_metadata(tmp, exact_klass->constant_encoding()); 3820 __ xorptr(tmp, mdo_addr); 3821 __ testptr(tmp, TypeEntries::type_mask); 3822 __ jcc(Assembler::zero, ok); 3823 3824 __ stop("unexpected profiling mismatch"); 3825 __ bind(ok); 3826 __ pop(tmp); 3827 } 3828 #else 3829 __ jccb(Assembler::zero, next); 3830 #endif 3831 // first time here. Set profile type. 3832 __ movptr(mdo_addr, tmp); 3833 } else { 3834 assert(ciTypeEntries::valid_ciklass(current_klass) != NULL && 3835 ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "inconsistent"); 3836 3837 __ movptr(tmp, mdo_addr); 3838 __ testptr(tmp, TypeEntries::type_unknown); 3839 __ jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore. 3840 3841 __ orptr(mdo_addr, TypeEntries::type_unknown); 3842 } 3843 } 3844 3845 __ bind(next); 3846 } 3847 } 3848 3849 void LIR_Assembler::emit_delay(LIR_OpDelay*) { 3850 Unimplemented(); 3851 } 3852 3853 3854 void LIR_Assembler::monitor_address(int monitor_no, LIR_Opr dst) { 3855 __ lea(dst->as_register(), frame_map()->address_for_monitor_lock(monitor_no)); 3856 } 3857 3858 3859 void LIR_Assembler::align_backward_branch_target() { 3860 __ align(BytesPerWord); 3861 } 3862 3863 3864 void LIR_Assembler::negate(LIR_Opr left, LIR_Opr dest) { 3865 if (left->is_single_cpu()) { 3866 __ negl(left->as_register()); 3867 move_regs(left->as_register(), dest->as_register()); 3868 3869 } else if (left->is_double_cpu()) { 3870 Register lo = left->as_register_lo(); 3871 #ifdef _LP64 3872 Register dst = dest->as_register_lo(); 3873 __ movptr(dst, lo); 3874 __ negptr(dst); 3875 #else 3876 Register hi = left->as_register_hi(); 3877 __ lneg(hi, lo); 3878 if (dest->as_register_lo() == hi) { 3879 assert(dest->as_register_hi() != lo, "destroying register"); 3880 move_regs(hi, dest->as_register_hi()); 3881 move_regs(lo, dest->as_register_lo()); 3882 } else { 3883 move_regs(lo, dest->as_register_lo()); 3884 move_regs(hi, dest->as_register_hi()); 3885 } 3886 #endif // _LP64 3887 3888 } else if (dest->is_single_xmm()) { 3889 if (left->as_xmm_float_reg() != dest->as_xmm_float_reg()) { 3890 __ movflt(dest->as_xmm_float_reg(), left->as_xmm_float_reg()); 3891 } 3892 __ xorps(dest->as_xmm_float_reg(), 3893 ExternalAddress((address)float_signflip_pool)); 3894 3895 } else if (dest->is_double_xmm()) { 3896 if (left->as_xmm_double_reg() != dest->as_xmm_double_reg()) { 3897 __ movdbl(dest->as_xmm_double_reg(), left->as_xmm_double_reg()); 3898 } 3899 __ xorpd(dest->as_xmm_double_reg(), 3900 ExternalAddress((address)double_signflip_pool)); 3901 3902 } else if (left->is_single_fpu() || left->is_double_fpu()) { 3903 assert(left->fpu() == 0, "arg must be on TOS"); 3904 assert(dest->fpu() == 0, "dest must be TOS"); 3905 __ fchs(); 3906 3907 } else { 3908 ShouldNotReachHere(); 3909 } 3910 } 3911 3912 3913 void LIR_Assembler::leal(LIR_Opr addr, LIR_Opr dest) { 3914 assert(addr->is_address() && dest->is_register(), "check"); 3915 Register reg; 3916 reg = dest->as_pointer_register(); 3917 __ lea(reg, as_Address(addr->as_address_ptr())); 3918 } 3919 3920 3921 3922 void LIR_Assembler::rt_call(LIR_Opr result, address dest, const LIR_OprList* args, LIR_Opr tmp, CodeEmitInfo* info) { 3923 assert(!tmp->is_valid(), "don't need temporary"); 3924 __ call(RuntimeAddress(dest)); 3925 if (info != NULL) { 3926 add_call_info_here(info); 3927 } 3928 } 3929 3930 3931 void LIR_Assembler::volatile_move_op(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info) { 3932 assert(type == T_LONG, "only for volatile long fields"); 3933 3934 if (info != NULL) { 3935 add_debug_info_for_null_check_here(info); 3936 } 3937 3938 if (src->is_double_xmm()) { 3939 if (dest->is_double_cpu()) { 3940 #ifdef _LP64 3941 __ movdq(dest->as_register_lo(), src->as_xmm_double_reg()); 3942 #else 3943 __ movdl(dest->as_register_lo(), src->as_xmm_double_reg()); 3944 __ psrlq(src->as_xmm_double_reg(), 32); 3945 __ movdl(dest->as_register_hi(), src->as_xmm_double_reg()); 3946 #endif // _LP64 3947 } else if (dest->is_double_stack()) { 3948 __ movdbl(frame_map()->address_for_slot(dest->double_stack_ix()), src->as_xmm_double_reg()); 3949 } else if (dest->is_address()) { 3950 __ movdbl(as_Address(dest->as_address_ptr()), src->as_xmm_double_reg()); 3951 } else { 3952 ShouldNotReachHere(); 3953 } 3954 3955 } else if (dest->is_double_xmm()) { 3956 if (src->is_double_stack()) { 3957 __ movdbl(dest->as_xmm_double_reg(), frame_map()->address_for_slot(src->double_stack_ix())); 3958 } else if (src->is_address()) { 3959 __ movdbl(dest->as_xmm_double_reg(), as_Address(src->as_address_ptr())); 3960 } else { 3961 ShouldNotReachHere(); 3962 } 3963 3964 } else if (src->is_double_fpu()) { 3965 assert(src->fpu_regnrLo() == 0, "must be TOS"); 3966 if (dest->is_double_stack()) { 3967 __ fistp_d(frame_map()->address_for_slot(dest->double_stack_ix())); 3968 } else if (dest->is_address()) { 3969 __ fistp_d(as_Address(dest->as_address_ptr())); 3970 } else { 3971 ShouldNotReachHere(); 3972 } 3973 3974 } else if (dest->is_double_fpu()) { 3975 assert(dest->fpu_regnrLo() == 0, "must be TOS"); 3976 if (src->is_double_stack()) { 3977 __ fild_d(frame_map()->address_for_slot(src->double_stack_ix())); 3978 } else if (src->is_address()) { 3979 __ fild_d(as_Address(src->as_address_ptr())); 3980 } else { 3981 ShouldNotReachHere(); 3982 } 3983 } else { 3984 ShouldNotReachHere(); 3985 } 3986 } 3987 3988 #ifdef ASSERT 3989 // emit run-time assertion 3990 void LIR_Assembler::emit_assert(LIR_OpAssert* op) { 3991 assert(op->code() == lir_assert, "must be"); 3992 3993 if (op->in_opr1()->is_valid()) { 3994 assert(op->in_opr2()->is_valid(), "both operands must be valid"); 3995 comp_op(op->condition(), op->in_opr1(), op->in_opr2(), op); 3996 } else { 3997 assert(op->in_opr2()->is_illegal(), "both operands must be illegal"); 3998 assert(op->condition() == lir_cond_always, "no other conditions allowed"); 3999 } 4000 4001 Label ok; 4002 if (op->condition() != lir_cond_always) { 4003 Assembler::Condition acond = Assembler::zero; 4004 switch (op->condition()) { 4005 case lir_cond_equal: acond = Assembler::equal; break; 4006 case lir_cond_notEqual: acond = Assembler::notEqual; break; 4007 case lir_cond_less: acond = Assembler::less; break; 4008 case lir_cond_lessEqual: acond = Assembler::lessEqual; break; 4009 case lir_cond_greaterEqual: acond = Assembler::greaterEqual;break; 4010 case lir_cond_greater: acond = Assembler::greater; break; 4011 case lir_cond_belowEqual: acond = Assembler::belowEqual; break; 4012 case lir_cond_aboveEqual: acond = Assembler::aboveEqual; break; 4013 default: ShouldNotReachHere(); 4014 } 4015 __ jcc(acond, ok); 4016 } 4017 if (op->halt()) { 4018 const char* str = __ code_string(op->msg()); 4019 __ stop(str); 4020 } else { 4021 breakpoint(); 4022 } 4023 __ bind(ok); 4024 } 4025 #endif 4026 4027 void LIR_Assembler::membar() { 4028 // QQQ sparc TSO uses this, 4029 __ membar( Assembler::Membar_mask_bits(Assembler::StoreLoad)); 4030 } 4031 4032 void LIR_Assembler::membar_acquire() { 4033 // No x86 machines currently require load fences 4034 // __ load_fence(); 4035 } 4036 4037 void LIR_Assembler::membar_release() { 4038 // No x86 machines currently require store fences 4039 // __ store_fence(); 4040 } 4041 4042 void LIR_Assembler::membar_loadload() { 4043 // no-op 4044 //__ membar(Assembler::Membar_mask_bits(Assembler::loadload)); 4045 } 4046 4047 void LIR_Assembler::membar_storestore() { 4048 // no-op 4049 //__ membar(Assembler::Membar_mask_bits(Assembler::storestore)); 4050 } 4051 4052 void LIR_Assembler::membar_loadstore() { 4053 // no-op 4054 //__ membar(Assembler::Membar_mask_bits(Assembler::loadstore)); 4055 } 4056 4057 void LIR_Assembler::membar_storeload() { 4058 __ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad)); 4059 } 4060 4061 void LIR_Assembler::get_thread(LIR_Opr result_reg) { 4062 assert(result_reg->is_register(), "check"); 4063 #ifdef _LP64 4064 // __ get_thread(result_reg->as_register_lo()); 4065 __ mov(result_reg->as_register(), r15_thread); 4066 #else 4067 __ get_thread(result_reg->as_register()); 4068 #endif // _LP64 4069 } 4070 4071 4072 void LIR_Assembler::peephole(LIR_List*) { 4073 // do nothing for now 4074 } 4075 4076 void LIR_Assembler::atomic_op(LIR_Code code, LIR_Opr src, LIR_Opr data, LIR_Opr dest, LIR_Opr tmp) { 4077 assert(data == dest, "xchg/xadd uses only 2 operands"); 4078 4079 if (data->type() == T_INT) { 4080 if (code == lir_xadd) { 4081 if (os::is_MP()) { 4082 __ lock(); 4083 } 4084 __ xaddl(as_Address(src->as_address_ptr()), data->as_register()); 4085 } else { 4086 __ xchgl(data->as_register(), as_Address(src->as_address_ptr())); 4087 } 4088 } else if (data->is_oop()) { 4089 assert (code == lir_xchg, "xadd for oops"); 4090 Register obj = data->as_register(); 4091 #ifdef _LP64 4092 if (UseCompressedOops) { 4093 __ encode_heap_oop(obj); 4094 __ xchgl(obj, as_Address(src->as_address_ptr())); 4095 __ decode_heap_oop(obj); 4096 } else { 4097 __ xchgptr(obj, as_Address(src->as_address_ptr())); 4098 } 4099 #else 4100 __ xchgl(obj, as_Address(src->as_address_ptr())); 4101 #endif 4102 } else if (data->type() == T_LONG) { 4103 #ifdef _LP64 4104 assert(data->as_register_lo() == data->as_register_hi(), "should be a single register"); 4105 if (code == lir_xadd) { 4106 if (os::is_MP()) { 4107 __ lock(); 4108 } 4109 __ xaddq(as_Address(src->as_address_ptr()), data->as_register_lo()); 4110 } else { 4111 __ xchgq(data->as_register_lo(), as_Address(src->as_address_ptr())); 4112 } 4113 #else 4114 ShouldNotReachHere(); 4115 #endif 4116 } else { 4117 ShouldNotReachHere(); 4118 } 4119 } 4120 4121 #undef __