1 /* 2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "jvm.h" 27 #include "asm/assembler.hpp" 28 #include "asm/assembler.inline.hpp" 29 #include "compiler/disassembler.hpp" 30 #include "gc/shared/barrierSet.hpp" 31 #include "gc/shared/barrierSetAssembler.hpp" 32 #include "gc/shared/collectedHeap.inline.hpp" 33 #include "interpreter/interpreter.hpp" 34 #include "memory/resourceArea.hpp" 35 #include "memory/universe.hpp" 36 #include "oops/accessDecorators.hpp" 37 #include "oops/klass.inline.hpp" 38 #include "prims/methodHandles.hpp" 39 #include "runtime/biasedLocking.hpp" 40 #include "runtime/flags/flagSetting.hpp" 41 #include "runtime/interfaceSupport.inline.hpp" 42 #include "runtime/objectMonitor.hpp" 43 #include "runtime/os.hpp" 44 #include "runtime/safepoint.hpp" 45 #include "runtime/safepointMechanism.hpp" 46 #include "runtime/sharedRuntime.hpp" 47 #include "runtime/stubRoutines.hpp" 48 #include "runtime/thread.hpp" 49 #include "utilities/macros.hpp" 50 #include "crc32c.h" 51 #ifdef COMPILER2 52 #include "opto/intrinsicnode.hpp" 53 #endif 54 55 #ifdef PRODUCT 56 #define BLOCK_COMMENT(str) /* nothing */ 57 #define STOP(error) stop(error) 58 #else 59 #define BLOCK_COMMENT(str) block_comment(str) 60 #define STOP(error) block_comment(error); stop(error) 61 #endif 62 63 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") 64 65 #ifdef ASSERT 66 bool AbstractAssembler::pd_check_instruction_mark() { return true; } 67 #endif 68 69 static Assembler::Condition reverse[] = { 70 Assembler::noOverflow /* overflow = 0x0 */ , 71 Assembler::overflow /* noOverflow = 0x1 */ , 72 Assembler::aboveEqual /* carrySet = 0x2, below = 0x2 */ , 73 Assembler::below /* aboveEqual = 0x3, carryClear = 0x3 */ , 74 Assembler::notZero /* zero = 0x4, equal = 0x4 */ , 75 Assembler::zero /* notZero = 0x5, notEqual = 0x5 */ , 76 Assembler::above /* belowEqual = 0x6 */ , 77 Assembler::belowEqual /* above = 0x7 */ , 78 Assembler::positive /* negative = 0x8 */ , 79 Assembler::negative /* positive = 0x9 */ , 80 Assembler::noParity /* parity = 0xa */ , 81 Assembler::parity /* noParity = 0xb */ , 82 Assembler::greaterEqual /* less = 0xc */ , 83 Assembler::less /* greaterEqual = 0xd */ , 84 Assembler::greater /* lessEqual = 0xe */ , 85 Assembler::lessEqual /* greater = 0xf, */ 86 87 }; 88 89 90 // Implementation of MacroAssembler 91 92 // First all the versions that have distinct versions depending on 32/64 bit 93 // Unless the difference is trivial (1 line or so). 94 95 #ifndef _LP64 96 97 // 32bit versions 98 99 Address MacroAssembler::as_Address(AddressLiteral adr) { 100 return Address(adr.target(), adr.rspec()); 101 } 102 103 Address MacroAssembler::as_Address(ArrayAddress adr) { 104 return Address::make_array(adr); 105 } 106 107 void MacroAssembler::call_VM_leaf_base(address entry_point, 108 int number_of_arguments) { 109 call(RuntimeAddress(entry_point)); 110 increment(rsp, number_of_arguments * wordSize); 111 } 112 113 void MacroAssembler::cmpklass(Address src1, Metadata* obj) { 114 cmp_literal32(src1, (int32_t)obj, metadata_Relocation::spec_for_immediate()); 115 } 116 117 void MacroAssembler::cmpklass(Register src1, Metadata* obj) { 118 cmp_literal32(src1, (int32_t)obj, metadata_Relocation::spec_for_immediate()); 119 } 120 121 void MacroAssembler::cmpoop_raw(Address src1, jobject obj) { 122 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate()); 123 } 124 125 void MacroAssembler::cmpoop_raw(Register src1, jobject obj) { 126 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate()); 127 } 128 129 void MacroAssembler::cmpoop(Address src1, jobject obj) { 130 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler(); 131 bs->obj_equals(this, src1, obj); 132 } 133 134 void MacroAssembler::cmpoop(Register src1, jobject obj) { 135 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler(); 136 bs->obj_equals(this, src1, obj); 137 } 138 139 void MacroAssembler::extend_sign(Register hi, Register lo) { 140 // According to Intel Doc. AP-526, "Integer Divide", p.18. 141 if (VM_Version::is_P6() && hi == rdx && lo == rax) { 142 cdql(); 143 } else { 144 movl(hi, lo); 145 sarl(hi, 31); 146 } 147 } 148 149 void MacroAssembler::jC2(Register tmp, Label& L) { 150 // set parity bit if FPU flag C2 is set (via rax) 151 save_rax(tmp); 152 fwait(); fnstsw_ax(); 153 sahf(); 154 restore_rax(tmp); 155 // branch 156 jcc(Assembler::parity, L); 157 } 158 159 void MacroAssembler::jnC2(Register tmp, Label& L) { 160 // set parity bit if FPU flag C2 is set (via rax) 161 save_rax(tmp); 162 fwait(); fnstsw_ax(); 163 sahf(); 164 restore_rax(tmp); 165 // branch 166 jcc(Assembler::noParity, L); 167 } 168 169 // 32bit can do a case table jump in one instruction but we no longer allow the base 170 // to be installed in the Address class 171 void MacroAssembler::jump(ArrayAddress entry) { 172 jmp(as_Address(entry)); 173 } 174 175 // Note: y_lo will be destroyed 176 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) { 177 // Long compare for Java (semantics as described in JVM spec.) 178 Label high, low, done; 179 180 cmpl(x_hi, y_hi); 181 jcc(Assembler::less, low); 182 jcc(Assembler::greater, high); 183 // x_hi is the return register 184 xorl(x_hi, x_hi); 185 cmpl(x_lo, y_lo); 186 jcc(Assembler::below, low); 187 jcc(Assembler::equal, done); 188 189 bind(high); 190 xorl(x_hi, x_hi); 191 increment(x_hi); 192 jmp(done); 193 194 bind(low); 195 xorl(x_hi, x_hi); 196 decrementl(x_hi); 197 198 bind(done); 199 } 200 201 void MacroAssembler::lea(Register dst, AddressLiteral src) { 202 mov_literal32(dst, (int32_t)src.target(), src.rspec()); 203 } 204 205 void MacroAssembler::lea(Address dst, AddressLiteral adr) { 206 // leal(dst, as_Address(adr)); 207 // see note in movl as to why we must use a move 208 mov_literal32(dst, (int32_t) adr.target(), adr.rspec()); 209 } 210 211 void MacroAssembler::leave() { 212 mov(rsp, rbp); 213 pop(rbp); 214 } 215 216 void MacroAssembler::lmul(int x_rsp_offset, int y_rsp_offset) { 217 // Multiplication of two Java long values stored on the stack 218 // as illustrated below. Result is in rdx:rax. 219 // 220 // rsp ---> [ ?? ] \ \ 221 // .... | y_rsp_offset | 222 // [ y_lo ] / (in bytes) | x_rsp_offset 223 // [ y_hi ] | (in bytes) 224 // .... | 225 // [ x_lo ] / 226 // [ x_hi ] 227 // .... 228 // 229 // Basic idea: lo(result) = lo(x_lo * y_lo) 230 // hi(result) = hi(x_lo * y_lo) + lo(x_hi * y_lo) + lo(x_lo * y_hi) 231 Address x_hi(rsp, x_rsp_offset + wordSize); Address x_lo(rsp, x_rsp_offset); 232 Address y_hi(rsp, y_rsp_offset + wordSize); Address y_lo(rsp, y_rsp_offset); 233 Label quick; 234 // load x_hi, y_hi and check if quick 235 // multiplication is possible 236 movl(rbx, x_hi); 237 movl(rcx, y_hi); 238 movl(rax, rbx); 239 orl(rbx, rcx); // rbx, = 0 <=> x_hi = 0 and y_hi = 0 240 jcc(Assembler::zero, quick); // if rbx, = 0 do quick multiply 241 // do full multiplication 242 // 1st step 243 mull(y_lo); // x_hi * y_lo 244 movl(rbx, rax); // save lo(x_hi * y_lo) in rbx, 245 // 2nd step 246 movl(rax, x_lo); 247 mull(rcx); // x_lo * y_hi 248 addl(rbx, rax); // add lo(x_lo * y_hi) to rbx, 249 // 3rd step 250 bind(quick); // note: rbx, = 0 if quick multiply! 251 movl(rax, x_lo); 252 mull(y_lo); // x_lo * y_lo 253 addl(rdx, rbx); // correct hi(x_lo * y_lo) 254 } 255 256 void MacroAssembler::lneg(Register hi, Register lo) { 257 negl(lo); 258 adcl(hi, 0); 259 negl(hi); 260 } 261 262 void MacroAssembler::lshl(Register hi, Register lo) { 263 // Java shift left long support (semantics as described in JVM spec., p.305) 264 // (basic idea for shift counts s >= n: x << s == (x << n) << (s - n)) 265 // shift value is in rcx ! 266 assert(hi != rcx, "must not use rcx"); 267 assert(lo != rcx, "must not use rcx"); 268 const Register s = rcx; // shift count 269 const int n = BitsPerWord; 270 Label L; 271 andl(s, 0x3f); // s := s & 0x3f (s < 0x40) 272 cmpl(s, n); // if (s < n) 273 jcc(Assembler::less, L); // else (s >= n) 274 movl(hi, lo); // x := x << n 275 xorl(lo, lo); 276 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n! 277 bind(L); // s (mod n) < n 278 shldl(hi, lo); // x := x << s 279 shll(lo); 280 } 281 282 283 void MacroAssembler::lshr(Register hi, Register lo, bool sign_extension) { 284 // Java shift right long support (semantics as described in JVM spec., p.306 & p.310) 285 // (basic idea for shift counts s >= n: x >> s == (x >> n) >> (s - n)) 286 assert(hi != rcx, "must not use rcx"); 287 assert(lo != rcx, "must not use rcx"); 288 const Register s = rcx; // shift count 289 const int n = BitsPerWord; 290 Label L; 291 andl(s, 0x3f); // s := s & 0x3f (s < 0x40) 292 cmpl(s, n); // if (s < n) 293 jcc(Assembler::less, L); // else (s >= n) 294 movl(lo, hi); // x := x >> n 295 if (sign_extension) sarl(hi, 31); 296 else xorl(hi, hi); 297 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n! 298 bind(L); // s (mod n) < n 299 shrdl(lo, hi); // x := x >> s 300 if (sign_extension) sarl(hi); 301 else shrl(hi); 302 } 303 304 void MacroAssembler::movoop(Register dst, jobject obj) { 305 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate()); 306 } 307 308 void MacroAssembler::movoop(Address dst, jobject obj) { 309 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate()); 310 } 311 312 void MacroAssembler::mov_metadata(Register dst, Metadata* obj) { 313 mov_literal32(dst, (int32_t)obj, metadata_Relocation::spec_for_immediate()); 314 } 315 316 void MacroAssembler::mov_metadata(Address dst, Metadata* obj) { 317 mov_literal32(dst, (int32_t)obj, metadata_Relocation::spec_for_immediate()); 318 } 319 320 void MacroAssembler::movptr(Register dst, AddressLiteral src, Register scratch) { 321 // scratch register is not used, 322 // it is defined to match parameters of 64-bit version of this method. 323 if (src.is_lval()) { 324 mov_literal32(dst, (intptr_t)src.target(), src.rspec()); 325 } else { 326 movl(dst, as_Address(src)); 327 } 328 } 329 330 void MacroAssembler::movptr(ArrayAddress dst, Register src) { 331 movl(as_Address(dst), src); 332 } 333 334 void MacroAssembler::movptr(Register dst, ArrayAddress src) { 335 movl(dst, as_Address(src)); 336 } 337 338 // src should NEVER be a real pointer. Use AddressLiteral for true pointers 339 void MacroAssembler::movptr(Address dst, intptr_t src) { 340 movl(dst, src); 341 } 342 343 344 void MacroAssembler::pop_callee_saved_registers() { 345 pop(rcx); 346 pop(rdx); 347 pop(rdi); 348 pop(rsi); 349 } 350 351 void MacroAssembler::pop_fTOS() { 352 fld_d(Address(rsp, 0)); 353 addl(rsp, 2 * wordSize); 354 } 355 356 void MacroAssembler::push_callee_saved_registers() { 357 push(rsi); 358 push(rdi); 359 push(rdx); 360 push(rcx); 361 } 362 363 void MacroAssembler::push_fTOS() { 364 subl(rsp, 2 * wordSize); 365 fstp_d(Address(rsp, 0)); 366 } 367 368 369 void MacroAssembler::pushoop(jobject obj) { 370 push_literal32((int32_t)obj, oop_Relocation::spec_for_immediate()); 371 } 372 373 void MacroAssembler::pushklass(Metadata* obj) { 374 push_literal32((int32_t)obj, metadata_Relocation::spec_for_immediate()); 375 } 376 377 void MacroAssembler::pushptr(AddressLiteral src) { 378 if (src.is_lval()) { 379 push_literal32((int32_t)src.target(), src.rspec()); 380 } else { 381 pushl(as_Address(src)); 382 } 383 } 384 385 void MacroAssembler::set_word_if_not_zero(Register dst) { 386 xorl(dst, dst); 387 set_byte_if_not_zero(dst); 388 } 389 390 static void pass_arg0(MacroAssembler* masm, Register arg) { 391 masm->push(arg); 392 } 393 394 static void pass_arg1(MacroAssembler* masm, Register arg) { 395 masm->push(arg); 396 } 397 398 static void pass_arg2(MacroAssembler* masm, Register arg) { 399 masm->push(arg); 400 } 401 402 static void pass_arg3(MacroAssembler* masm, Register arg) { 403 masm->push(arg); 404 } 405 406 #ifndef PRODUCT 407 extern "C" void findpc(intptr_t x); 408 #endif 409 410 void MacroAssembler::debug32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip, char* msg) { 411 // In order to get locks to work, we need to fake a in_VM state 412 JavaThread* thread = JavaThread::current(); 413 JavaThreadState saved_state = thread->thread_state(); 414 thread->set_thread_state(_thread_in_vm); 415 if (ShowMessageBoxOnError) { 416 JavaThread* thread = JavaThread::current(); 417 JavaThreadState saved_state = thread->thread_state(); 418 thread->set_thread_state(_thread_in_vm); 419 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 420 ttyLocker ttyl; 421 BytecodeCounter::print(); 422 } 423 // To see where a verify_oop failed, get $ebx+40/X for this frame. 424 // This is the value of eip which points to where verify_oop will return. 425 if (os::message_box(msg, "Execution stopped, print registers?")) { 426 print_state32(rdi, rsi, rbp, rsp, rbx, rdx, rcx, rax, eip); 427 BREAKPOINT; 428 } 429 } else { 430 ttyLocker ttyl; 431 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n", msg); 432 } 433 // Don't assert holding the ttyLock 434 assert(false, "DEBUG MESSAGE: %s", msg); 435 ThreadStateTransition::transition(thread, _thread_in_vm, saved_state); 436 } 437 438 void MacroAssembler::print_state32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip) { 439 ttyLocker ttyl; 440 FlagSetting fs(Debugging, true); 441 tty->print_cr("eip = 0x%08x", eip); 442 #ifndef PRODUCT 443 if ((WizardMode || Verbose) && PrintMiscellaneous) { 444 tty->cr(); 445 findpc(eip); 446 tty->cr(); 447 } 448 #endif 449 #define PRINT_REG(rax) \ 450 { tty->print("%s = ", #rax); os::print_location(tty, rax); } 451 PRINT_REG(rax); 452 PRINT_REG(rbx); 453 PRINT_REG(rcx); 454 PRINT_REG(rdx); 455 PRINT_REG(rdi); 456 PRINT_REG(rsi); 457 PRINT_REG(rbp); 458 PRINT_REG(rsp); 459 #undef PRINT_REG 460 // Print some words near top of staack. 461 int* dump_sp = (int*) rsp; 462 for (int col1 = 0; col1 < 8; col1++) { 463 tty->print("(rsp+0x%03x) 0x%08x: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp); 464 os::print_location(tty, *dump_sp++); 465 } 466 for (int row = 0; row < 16; row++) { 467 tty->print("(rsp+0x%03x) 0x%08x: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp); 468 for (int col = 0; col < 8; col++) { 469 tty->print(" 0x%08x", *dump_sp++); 470 } 471 tty->cr(); 472 } 473 // Print some instructions around pc: 474 Disassembler::decode((address)eip-64, (address)eip); 475 tty->print_cr("--------"); 476 Disassembler::decode((address)eip, (address)eip+32); 477 } 478 479 void MacroAssembler::stop(const char* msg) { 480 ExternalAddress message((address)msg); 481 // push address of message 482 pushptr(message.addr()); 483 { Label L; call(L, relocInfo::none); bind(L); } // push eip 484 pusha(); // push registers 485 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug32))); 486 hlt(); 487 } 488 489 void MacroAssembler::warn(const char* msg) { 490 push_CPU_state(); 491 492 ExternalAddress message((address) msg); 493 // push address of message 494 pushptr(message.addr()); 495 496 call(RuntimeAddress(CAST_FROM_FN_PTR(address, warning))); 497 addl(rsp, wordSize); // discard argument 498 pop_CPU_state(); 499 } 500 501 void MacroAssembler::print_state() { 502 { Label L; call(L, relocInfo::none); bind(L); } // push eip 503 pusha(); // push registers 504 505 push_CPU_state(); 506 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::print_state32))); 507 pop_CPU_state(); 508 509 popa(); 510 addl(rsp, wordSize); 511 } 512 513 #else // _LP64 514 515 // 64 bit versions 516 517 Address MacroAssembler::as_Address(AddressLiteral adr) { 518 // amd64 always does this as a pc-rel 519 // we can be absolute or disp based on the instruction type 520 // jmp/call are displacements others are absolute 521 assert(!adr.is_lval(), "must be rval"); 522 assert(reachable(adr), "must be"); 523 return Address((int32_t)(intptr_t)(adr.target() - pc()), adr.target(), adr.reloc()); 524 525 } 526 527 Address MacroAssembler::as_Address(ArrayAddress adr) { 528 AddressLiteral base = adr.base(); 529 lea(rscratch1, base); 530 Address index = adr.index(); 531 assert(index._disp == 0, "must not have disp"); // maybe it can? 532 Address array(rscratch1, index._index, index._scale, index._disp); 533 return array; 534 } 535 536 void MacroAssembler::call_VM_leaf_base(address entry_point, int num_args) { 537 Label L, E; 538 539 #ifdef _WIN64 540 // Windows always allocates space for it's register args 541 assert(num_args <= 4, "only register arguments supported"); 542 subq(rsp, frame::arg_reg_save_area_bytes); 543 #endif 544 545 // Align stack if necessary 546 testl(rsp, 15); 547 jcc(Assembler::zero, L); 548 549 subq(rsp, 8); 550 { 551 call(RuntimeAddress(entry_point)); 552 } 553 addq(rsp, 8); 554 jmp(E); 555 556 bind(L); 557 { 558 call(RuntimeAddress(entry_point)); 559 } 560 561 bind(E); 562 563 #ifdef _WIN64 564 // restore stack pointer 565 addq(rsp, frame::arg_reg_save_area_bytes); 566 #endif 567 568 } 569 570 void MacroAssembler::cmp64(Register src1, AddressLiteral src2) { 571 assert(!src2.is_lval(), "should use cmpptr"); 572 573 if (reachable(src2)) { 574 cmpq(src1, as_Address(src2)); 575 } else { 576 lea(rscratch1, src2); 577 Assembler::cmpq(src1, Address(rscratch1, 0)); 578 } 579 } 580 581 int MacroAssembler::corrected_idivq(Register reg) { 582 // Full implementation of Java ldiv and lrem; checks for special 583 // case as described in JVM spec., p.243 & p.271. The function 584 // returns the (pc) offset of the idivl instruction - may be needed 585 // for implicit exceptions. 586 // 587 // normal case special case 588 // 589 // input : rax: dividend min_long 590 // reg: divisor (may not be eax/edx) -1 591 // 592 // output: rax: quotient (= rax idiv reg) min_long 593 // rdx: remainder (= rax irem reg) 0 594 assert(reg != rax && reg != rdx, "reg cannot be rax or rdx register"); 595 static const int64_t min_long = 0x8000000000000000; 596 Label normal_case, special_case; 597 598 // check for special case 599 cmp64(rax, ExternalAddress((address) &min_long)); 600 jcc(Assembler::notEqual, normal_case); 601 xorl(rdx, rdx); // prepare rdx for possible special case (where 602 // remainder = 0) 603 cmpq(reg, -1); 604 jcc(Assembler::equal, special_case); 605 606 // handle normal case 607 bind(normal_case); 608 cdqq(); 609 int idivq_offset = offset(); 610 idivq(reg); 611 612 // normal and special case exit 613 bind(special_case); 614 615 return idivq_offset; 616 } 617 618 void MacroAssembler::decrementq(Register reg, int value) { 619 if (value == min_jint) { subq(reg, value); return; } 620 if (value < 0) { incrementq(reg, -value); return; } 621 if (value == 0) { ; return; } 622 if (value == 1 && UseIncDec) { decq(reg) ; return; } 623 /* else */ { subq(reg, value) ; return; } 624 } 625 626 void MacroAssembler::decrementq(Address dst, int value) { 627 if (value == min_jint) { subq(dst, value); return; } 628 if (value < 0) { incrementq(dst, -value); return; } 629 if (value == 0) { ; return; } 630 if (value == 1 && UseIncDec) { decq(dst) ; return; } 631 /* else */ { subq(dst, value) ; return; } 632 } 633 634 void MacroAssembler::incrementq(AddressLiteral dst) { 635 if (reachable(dst)) { 636 incrementq(as_Address(dst)); 637 } else { 638 lea(rscratch1, dst); 639 incrementq(Address(rscratch1, 0)); 640 } 641 } 642 643 void MacroAssembler::incrementq(Register reg, int value) { 644 if (value == min_jint) { addq(reg, value); return; } 645 if (value < 0) { decrementq(reg, -value); return; } 646 if (value == 0) { ; return; } 647 if (value == 1 && UseIncDec) { incq(reg) ; return; } 648 /* else */ { addq(reg, value) ; return; } 649 } 650 651 void MacroAssembler::incrementq(Address dst, int value) { 652 if (value == min_jint) { addq(dst, value); return; } 653 if (value < 0) { decrementq(dst, -value); return; } 654 if (value == 0) { ; return; } 655 if (value == 1 && UseIncDec) { incq(dst) ; return; } 656 /* else */ { addq(dst, value) ; return; } 657 } 658 659 // 32bit can do a case table jump in one instruction but we no longer allow the base 660 // to be installed in the Address class 661 void MacroAssembler::jump(ArrayAddress entry) { 662 lea(rscratch1, entry.base()); 663 Address dispatch = entry.index(); 664 assert(dispatch._base == noreg, "must be"); 665 dispatch._base = rscratch1; 666 jmp(dispatch); 667 } 668 669 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) { 670 ShouldNotReachHere(); // 64bit doesn't use two regs 671 cmpq(x_lo, y_lo); 672 } 673 674 void MacroAssembler::lea(Register dst, AddressLiteral src) { 675 mov_literal64(dst, (intptr_t)src.target(), src.rspec()); 676 } 677 678 void MacroAssembler::lea(Address dst, AddressLiteral adr) { 679 mov_literal64(rscratch1, (intptr_t)adr.target(), adr.rspec()); 680 movptr(dst, rscratch1); 681 } 682 683 void MacroAssembler::leave() { 684 // %%% is this really better? Why not on 32bit too? 685 emit_int8((unsigned char)0xC9); // LEAVE 686 } 687 688 void MacroAssembler::lneg(Register hi, Register lo) { 689 ShouldNotReachHere(); // 64bit doesn't use two regs 690 negq(lo); 691 } 692 693 void MacroAssembler::movoop(Register dst, jobject obj) { 694 mov_literal64(dst, (intptr_t)obj, oop_Relocation::spec_for_immediate()); 695 } 696 697 void MacroAssembler::movoop(Address dst, jobject obj) { 698 mov_literal64(rscratch1, (intptr_t)obj, oop_Relocation::spec_for_immediate()); 699 movq(dst, rscratch1); 700 } 701 702 void MacroAssembler::mov_metadata(Register dst, Metadata* obj) { 703 mov_literal64(dst, (intptr_t)obj, metadata_Relocation::spec_for_immediate()); 704 } 705 706 void MacroAssembler::mov_metadata(Address dst, Metadata* obj) { 707 mov_literal64(rscratch1, (intptr_t)obj, metadata_Relocation::spec_for_immediate()); 708 movq(dst, rscratch1); 709 } 710 711 void MacroAssembler::movptr(Register dst, AddressLiteral src, Register scratch) { 712 if (src.is_lval()) { 713 mov_literal64(dst, (intptr_t)src.target(), src.rspec()); 714 } else { 715 if (reachable(src)) { 716 movq(dst, as_Address(src)); 717 } else { 718 lea(scratch, src); 719 movq(dst, Address(scratch, 0)); 720 } 721 } 722 } 723 724 void MacroAssembler::movptr(ArrayAddress dst, Register src) { 725 movq(as_Address(dst), src); 726 } 727 728 void MacroAssembler::movptr(Register dst, ArrayAddress src) { 729 movq(dst, as_Address(src)); 730 } 731 732 // src should NEVER be a real pointer. Use AddressLiteral for true pointers 733 void MacroAssembler::movptr(Address dst, intptr_t src) { 734 mov64(rscratch1, src); 735 movq(dst, rscratch1); 736 } 737 738 // These are mostly for initializing NULL 739 void MacroAssembler::movptr(Address dst, int32_t src) { 740 movslq(dst, src); 741 } 742 743 void MacroAssembler::movptr(Register dst, int32_t src) { 744 mov64(dst, (intptr_t)src); 745 } 746 747 void MacroAssembler::pushoop(jobject obj) { 748 movoop(rscratch1, obj); 749 push(rscratch1); 750 } 751 752 void MacroAssembler::pushklass(Metadata* obj) { 753 mov_metadata(rscratch1, obj); 754 push(rscratch1); 755 } 756 757 void MacroAssembler::pushptr(AddressLiteral src) { 758 lea(rscratch1, src); 759 if (src.is_lval()) { 760 push(rscratch1); 761 } else { 762 pushq(Address(rscratch1, 0)); 763 } 764 } 765 766 void MacroAssembler::reset_last_Java_frame(bool clear_fp) { 767 // we must set sp to zero to clear frame 768 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), NULL_WORD); 769 // must clear fp, so that compiled frames are not confused; it is 770 // possible that we need it only for debugging 771 if (clear_fp) { 772 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()), NULL_WORD); 773 } 774 775 // Always clear the pc because it could have been set by make_walkable() 776 movptr(Address(r15_thread, JavaThread::last_Java_pc_offset()), NULL_WORD); 777 vzeroupper(); 778 } 779 780 void MacroAssembler::set_last_Java_frame(Register last_java_sp, 781 Register last_java_fp, 782 address last_java_pc) { 783 vzeroupper(); 784 // determine last_java_sp register 785 if (!last_java_sp->is_valid()) { 786 last_java_sp = rsp; 787 } 788 789 // last_java_fp is optional 790 if (last_java_fp->is_valid()) { 791 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()), 792 last_java_fp); 793 } 794 795 // last_java_pc is optional 796 if (last_java_pc != NULL) { 797 Address java_pc(r15_thread, 798 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset()); 799 lea(rscratch1, InternalAddress(last_java_pc)); 800 movptr(java_pc, rscratch1); 801 } 802 803 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), last_java_sp); 804 } 805 806 static void pass_arg0(MacroAssembler* masm, Register arg) { 807 if (c_rarg0 != arg ) { 808 masm->mov(c_rarg0, arg); 809 } 810 } 811 812 static void pass_arg1(MacroAssembler* masm, Register arg) { 813 if (c_rarg1 != arg ) { 814 masm->mov(c_rarg1, arg); 815 } 816 } 817 818 static void pass_arg2(MacroAssembler* masm, Register arg) { 819 if (c_rarg2 != arg ) { 820 masm->mov(c_rarg2, arg); 821 } 822 } 823 824 static void pass_arg3(MacroAssembler* masm, Register arg) { 825 if (c_rarg3 != arg ) { 826 masm->mov(c_rarg3, arg); 827 } 828 } 829 830 void MacroAssembler::stop(const char* msg) { 831 address rip = pc(); 832 pusha(); // get regs on stack 833 lea(c_rarg0, ExternalAddress((address) msg)); 834 lea(c_rarg1, InternalAddress(rip)); 835 movq(c_rarg2, rsp); // pass pointer to regs array 836 andq(rsp, -16); // align stack as required by ABI 837 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug64))); 838 hlt(); 839 } 840 841 void MacroAssembler::warn(const char* msg) { 842 push(rbp); 843 movq(rbp, rsp); 844 andq(rsp, -16); // align stack as required by push_CPU_state and call 845 push_CPU_state(); // keeps alignment at 16 bytes 846 lea(c_rarg0, ExternalAddress((address) msg)); 847 lea(rax, ExternalAddress(CAST_FROM_FN_PTR(address, warning))); 848 call(rax); 849 pop_CPU_state(); 850 mov(rsp, rbp); 851 pop(rbp); 852 } 853 854 void MacroAssembler::print_state() { 855 address rip = pc(); 856 pusha(); // get regs on stack 857 push(rbp); 858 movq(rbp, rsp); 859 andq(rsp, -16); // align stack as required by push_CPU_state and call 860 push_CPU_state(); // keeps alignment at 16 bytes 861 862 lea(c_rarg0, InternalAddress(rip)); 863 lea(c_rarg1, Address(rbp, wordSize)); // pass pointer to regs array 864 call_VM_leaf(CAST_FROM_FN_PTR(address, MacroAssembler::print_state64), c_rarg0, c_rarg1); 865 866 pop_CPU_state(); 867 mov(rsp, rbp); 868 pop(rbp); 869 popa(); 870 } 871 872 #ifndef PRODUCT 873 extern "C" void findpc(intptr_t x); 874 #endif 875 876 void MacroAssembler::debug64(char* msg, int64_t pc, int64_t regs[]) { 877 // In order to get locks to work, we need to fake a in_VM state 878 if (ShowMessageBoxOnError) { 879 JavaThread* thread = JavaThread::current(); 880 JavaThreadState saved_state = thread->thread_state(); 881 thread->set_thread_state(_thread_in_vm); 882 #ifndef PRODUCT 883 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 884 ttyLocker ttyl; 885 BytecodeCounter::print(); 886 } 887 #endif 888 // To see where a verify_oop failed, get $ebx+40/X for this frame. 889 // XXX correct this offset for amd64 890 // This is the value of eip which points to where verify_oop will return. 891 if (os::message_box(msg, "Execution stopped, print registers?")) { 892 print_state64(pc, regs); 893 BREAKPOINT; 894 assert(false, "start up GDB"); 895 } 896 ThreadStateTransition::transition(thread, _thread_in_vm, saved_state); 897 } else { 898 ttyLocker ttyl; 899 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n", 900 msg); 901 assert(false, "DEBUG MESSAGE: %s", msg); 902 } 903 } 904 905 void MacroAssembler::print_state64(int64_t pc, int64_t regs[]) { 906 ttyLocker ttyl; 907 FlagSetting fs(Debugging, true); 908 tty->print_cr("rip = 0x%016lx", (intptr_t)pc); 909 #ifndef PRODUCT 910 tty->cr(); 911 findpc(pc); 912 tty->cr(); 913 #endif 914 #define PRINT_REG(rax, value) \ 915 { tty->print("%s = ", #rax); os::print_location(tty, value); } 916 PRINT_REG(rax, regs[15]); 917 PRINT_REG(rbx, regs[12]); 918 PRINT_REG(rcx, regs[14]); 919 PRINT_REG(rdx, regs[13]); 920 PRINT_REG(rdi, regs[8]); 921 PRINT_REG(rsi, regs[9]); 922 PRINT_REG(rbp, regs[10]); 923 PRINT_REG(rsp, regs[11]); 924 PRINT_REG(r8 , regs[7]); 925 PRINT_REG(r9 , regs[6]); 926 PRINT_REG(r10, regs[5]); 927 PRINT_REG(r11, regs[4]); 928 PRINT_REG(r12, regs[3]); 929 PRINT_REG(r13, regs[2]); 930 PRINT_REG(r14, regs[1]); 931 PRINT_REG(r15, regs[0]); 932 #undef PRINT_REG 933 // Print some words near top of staack. 934 int64_t* rsp = (int64_t*) regs[11]; 935 int64_t* dump_sp = rsp; 936 for (int col1 = 0; col1 < 8; col1++) { 937 tty->print("(rsp+0x%03x) 0x%016lx: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp); 938 os::print_location(tty, *dump_sp++); 939 } 940 for (int row = 0; row < 25; row++) { 941 tty->print("(rsp+0x%03x) 0x%016lx: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp); 942 for (int col = 0; col < 4; col++) { 943 tty->print(" 0x%016lx", (intptr_t)*dump_sp++); 944 } 945 tty->cr(); 946 } 947 // Print some instructions around pc: 948 Disassembler::decode((address)pc-64, (address)pc); 949 tty->print_cr("--------"); 950 Disassembler::decode((address)pc, (address)pc+32); 951 } 952 953 #endif // _LP64 954 955 // Now versions that are common to 32/64 bit 956 957 void MacroAssembler::addptr(Register dst, int32_t imm32) { 958 LP64_ONLY(addq(dst, imm32)) NOT_LP64(addl(dst, imm32)); 959 } 960 961 void MacroAssembler::addptr(Register dst, Register src) { 962 LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src)); 963 } 964 965 void MacroAssembler::addptr(Address dst, Register src) { 966 LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src)); 967 } 968 969 void MacroAssembler::addsd(XMMRegister dst, AddressLiteral src) { 970 if (reachable(src)) { 971 Assembler::addsd(dst, as_Address(src)); 972 } else { 973 lea(rscratch1, src); 974 Assembler::addsd(dst, Address(rscratch1, 0)); 975 } 976 } 977 978 void MacroAssembler::addss(XMMRegister dst, AddressLiteral src) { 979 if (reachable(src)) { 980 addss(dst, as_Address(src)); 981 } else { 982 lea(rscratch1, src); 983 addss(dst, Address(rscratch1, 0)); 984 } 985 } 986 987 void MacroAssembler::addpd(XMMRegister dst, AddressLiteral src) { 988 if (reachable(src)) { 989 Assembler::addpd(dst, as_Address(src)); 990 } else { 991 lea(rscratch1, src); 992 Assembler::addpd(dst, Address(rscratch1, 0)); 993 } 994 } 995 996 void MacroAssembler::align(int modulus) { 997 align(modulus, offset()); 998 } 999 1000 void MacroAssembler::align(int modulus, int target) { 1001 if (target % modulus != 0) { 1002 nop(modulus - (target % modulus)); 1003 } 1004 } 1005 1006 void MacroAssembler::andpd(XMMRegister dst, AddressLiteral src) { 1007 // Used in sign-masking with aligned address. 1008 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes"); 1009 if (reachable(src)) { 1010 Assembler::andpd(dst, as_Address(src)); 1011 } else { 1012 lea(rscratch1, src); 1013 Assembler::andpd(dst, Address(rscratch1, 0)); 1014 } 1015 } 1016 1017 void MacroAssembler::andps(XMMRegister dst, AddressLiteral src) { 1018 // Used in sign-masking with aligned address. 1019 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes"); 1020 if (reachable(src)) { 1021 Assembler::andps(dst, as_Address(src)); 1022 } else { 1023 lea(rscratch1, src); 1024 Assembler::andps(dst, Address(rscratch1, 0)); 1025 } 1026 } 1027 1028 void MacroAssembler::andptr(Register dst, int32_t imm32) { 1029 LP64_ONLY(andq(dst, imm32)) NOT_LP64(andl(dst, imm32)); 1030 } 1031 1032 void MacroAssembler::atomic_incl(Address counter_addr) { 1033 if (os::is_MP()) 1034 lock(); 1035 incrementl(counter_addr); 1036 } 1037 1038 void MacroAssembler::atomic_incl(AddressLiteral counter_addr, Register scr) { 1039 if (reachable(counter_addr)) { 1040 atomic_incl(as_Address(counter_addr)); 1041 } else { 1042 lea(scr, counter_addr); 1043 atomic_incl(Address(scr, 0)); 1044 } 1045 } 1046 1047 #ifdef _LP64 1048 void MacroAssembler::atomic_incq(Address counter_addr) { 1049 if (os::is_MP()) 1050 lock(); 1051 incrementq(counter_addr); 1052 } 1053 1054 void MacroAssembler::atomic_incq(AddressLiteral counter_addr, Register scr) { 1055 if (reachable(counter_addr)) { 1056 atomic_incq(as_Address(counter_addr)); 1057 } else { 1058 lea(scr, counter_addr); 1059 atomic_incq(Address(scr, 0)); 1060 } 1061 } 1062 #endif 1063 1064 // Writes to stack successive pages until offset reached to check for 1065 // stack overflow + shadow pages. This clobbers tmp. 1066 void MacroAssembler::bang_stack_size(Register size, Register tmp) { 1067 movptr(tmp, rsp); 1068 // Bang stack for total size given plus shadow page size. 1069 // Bang one page at a time because large size can bang beyond yellow and 1070 // red zones. 1071 Label loop; 1072 bind(loop); 1073 movl(Address(tmp, (-os::vm_page_size())), size ); 1074 subptr(tmp, os::vm_page_size()); 1075 subl(size, os::vm_page_size()); 1076 jcc(Assembler::greater, loop); 1077 1078 // Bang down shadow pages too. 1079 // At this point, (tmp-0) is the last address touched, so don't 1080 // touch it again. (It was touched as (tmp-pagesize) but then tmp 1081 // was post-decremented.) Skip this address by starting at i=1, and 1082 // touch a few more pages below. N.B. It is important to touch all 1083 // the way down including all pages in the shadow zone. 1084 for (int i = 1; i < ((int)JavaThread::stack_shadow_zone_size() / os::vm_page_size()); i++) { 1085 // this could be any sized move but this is can be a debugging crumb 1086 // so the bigger the better. 1087 movptr(Address(tmp, (-i*os::vm_page_size())), size ); 1088 } 1089 } 1090 1091 void MacroAssembler::reserved_stack_check() { 1092 // testing if reserved zone needs to be enabled 1093 Label no_reserved_zone_enabling; 1094 Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread); 1095 NOT_LP64(get_thread(rsi);) 1096 1097 cmpptr(rsp, Address(thread, JavaThread::reserved_stack_activation_offset())); 1098 jcc(Assembler::below, no_reserved_zone_enabling); 1099 1100 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), thread); 1101 jump(RuntimeAddress(StubRoutines::throw_delayed_StackOverflowError_entry())); 1102 should_not_reach_here(); 1103 1104 bind(no_reserved_zone_enabling); 1105 } 1106 1107 int MacroAssembler::biased_locking_enter(Register lock_reg, 1108 Register obj_reg, 1109 Register swap_reg, 1110 Register tmp_reg, 1111 bool swap_reg_contains_mark, 1112 Label& done, 1113 Label* slow_case, 1114 BiasedLockingCounters* counters) { 1115 assert(UseBiasedLocking, "why call this otherwise?"); 1116 assert(swap_reg == rax, "swap_reg must be rax for cmpxchgq"); 1117 assert(tmp_reg != noreg, "tmp_reg must be supplied"); 1118 assert_different_registers(lock_reg, obj_reg, swap_reg, tmp_reg); 1119 assert(markOopDesc::age_shift == markOopDesc::lock_bits + markOopDesc::biased_lock_bits, "biased locking makes assumptions about bit layout"); 1120 Address mark_addr (obj_reg, oopDesc::mark_offset_in_bytes()); 1121 NOT_LP64( Address saved_mark_addr(lock_reg, 0); ) 1122 1123 if (PrintBiasedLockingStatistics && counters == NULL) { 1124 counters = BiasedLocking::counters(); 1125 } 1126 // Biased locking 1127 // See whether the lock is currently biased toward our thread and 1128 // whether the epoch is still valid 1129 // Note that the runtime guarantees sufficient alignment of JavaThread 1130 // pointers to allow age to be placed into low bits 1131 // First check to see whether biasing is even enabled for this object 1132 Label cas_label; 1133 int null_check_offset = -1; 1134 if (!swap_reg_contains_mark) { 1135 null_check_offset = offset(); 1136 movptr(swap_reg, mark_addr); 1137 } 1138 movptr(tmp_reg, swap_reg); 1139 andptr(tmp_reg, markOopDesc::biased_lock_mask_in_place); 1140 cmpptr(tmp_reg, markOopDesc::biased_lock_pattern); 1141 jcc(Assembler::notEqual, cas_label); 1142 // The bias pattern is present in the object's header. Need to check 1143 // whether the bias owner and the epoch are both still current. 1144 #ifndef _LP64 1145 // Note that because there is no current thread register on x86_32 we 1146 // need to store off the mark word we read out of the object to 1147 // avoid reloading it and needing to recheck invariants below. This 1148 // store is unfortunate but it makes the overall code shorter and 1149 // simpler. 1150 movptr(saved_mark_addr, swap_reg); 1151 #endif 1152 if (swap_reg_contains_mark) { 1153 null_check_offset = offset(); 1154 } 1155 load_prototype_header(tmp_reg, obj_reg); 1156 #ifdef _LP64 1157 orptr(tmp_reg, r15_thread); 1158 xorptr(tmp_reg, swap_reg); 1159 Register header_reg = tmp_reg; 1160 #else 1161 xorptr(tmp_reg, swap_reg); 1162 get_thread(swap_reg); 1163 xorptr(swap_reg, tmp_reg); 1164 Register header_reg = swap_reg; 1165 #endif 1166 andptr(header_reg, ~((int) markOopDesc::age_mask_in_place)); 1167 if (counters != NULL) { 1168 cond_inc32(Assembler::zero, 1169 ExternalAddress((address) counters->biased_lock_entry_count_addr())); 1170 } 1171 jcc(Assembler::equal, done); 1172 1173 Label try_revoke_bias; 1174 Label try_rebias; 1175 1176 // At this point we know that the header has the bias pattern and 1177 // that we are not the bias owner in the current epoch. We need to 1178 // figure out more details about the state of the header in order to 1179 // know what operations can be legally performed on the object's 1180 // header. 1181 1182 // If the low three bits in the xor result aren't clear, that means 1183 // the prototype header is no longer biased and we have to revoke 1184 // the bias on this object. 1185 testptr(header_reg, markOopDesc::biased_lock_mask_in_place); 1186 jccb(Assembler::notZero, try_revoke_bias); 1187 1188 // Biasing is still enabled for this data type. See whether the 1189 // epoch of the current bias is still valid, meaning that the epoch 1190 // bits of the mark word are equal to the epoch bits of the 1191 // prototype header. (Note that the prototype header's epoch bits 1192 // only change at a safepoint.) If not, attempt to rebias the object 1193 // toward the current thread. Note that we must be absolutely sure 1194 // that the current epoch is invalid in order to do this because 1195 // otherwise the manipulations it performs on the mark word are 1196 // illegal. 1197 testptr(header_reg, markOopDesc::epoch_mask_in_place); 1198 jccb(Assembler::notZero, try_rebias); 1199 1200 // The epoch of the current bias is still valid but we know nothing 1201 // about the owner; it might be set or it might be clear. Try to 1202 // acquire the bias of the object using an atomic operation. If this 1203 // fails we will go in to the runtime to revoke the object's bias. 1204 // Note that we first construct the presumed unbiased header so we 1205 // don't accidentally blow away another thread's valid bias. 1206 NOT_LP64( movptr(swap_reg, saved_mark_addr); ) 1207 andptr(swap_reg, 1208 markOopDesc::biased_lock_mask_in_place | markOopDesc::age_mask_in_place | markOopDesc::epoch_mask_in_place); 1209 #ifdef _LP64 1210 movptr(tmp_reg, swap_reg); 1211 orptr(tmp_reg, r15_thread); 1212 #else 1213 get_thread(tmp_reg); 1214 orptr(tmp_reg, swap_reg); 1215 #endif 1216 if (os::is_MP()) { 1217 lock(); 1218 } 1219 cmpxchgptr(tmp_reg, mark_addr); // compare tmp_reg and swap_reg 1220 // If the biasing toward our thread failed, this means that 1221 // another thread succeeded in biasing it toward itself and we 1222 // need to revoke that bias. The revocation will occur in the 1223 // interpreter runtime in the slow case. 1224 if (counters != NULL) { 1225 cond_inc32(Assembler::zero, 1226 ExternalAddress((address) counters->anonymously_biased_lock_entry_count_addr())); 1227 } 1228 if (slow_case != NULL) { 1229 jcc(Assembler::notZero, *slow_case); 1230 } 1231 jmp(done); 1232 1233 bind(try_rebias); 1234 // At this point we know the epoch has expired, meaning that the 1235 // current "bias owner", if any, is actually invalid. Under these 1236 // circumstances _only_, we are allowed to use the current header's 1237 // value as the comparison value when doing the cas to acquire the 1238 // bias in the current epoch. In other words, we allow transfer of 1239 // the bias from one thread to another directly in this situation. 1240 // 1241 // FIXME: due to a lack of registers we currently blow away the age 1242 // bits in this situation. Should attempt to preserve them. 1243 load_prototype_header(tmp_reg, obj_reg); 1244 #ifdef _LP64 1245 orptr(tmp_reg, r15_thread); 1246 #else 1247 get_thread(swap_reg); 1248 orptr(tmp_reg, swap_reg); 1249 movptr(swap_reg, saved_mark_addr); 1250 #endif 1251 if (os::is_MP()) { 1252 lock(); 1253 } 1254 cmpxchgptr(tmp_reg, mark_addr); // compare tmp_reg and swap_reg 1255 // If the biasing toward our thread failed, then another thread 1256 // succeeded in biasing it toward itself and we need to revoke that 1257 // bias. The revocation will occur in the runtime in the slow case. 1258 if (counters != NULL) { 1259 cond_inc32(Assembler::zero, 1260 ExternalAddress((address) counters->rebiased_lock_entry_count_addr())); 1261 } 1262 if (slow_case != NULL) { 1263 jcc(Assembler::notZero, *slow_case); 1264 } 1265 jmp(done); 1266 1267 bind(try_revoke_bias); 1268 // The prototype mark in the klass doesn't have the bias bit set any 1269 // more, indicating that objects of this data type are not supposed 1270 // to be biased any more. We are going to try to reset the mark of 1271 // this object to the prototype value and fall through to the 1272 // CAS-based locking scheme. Note that if our CAS fails, it means 1273 // that another thread raced us for the privilege of revoking the 1274 // bias of this particular object, so it's okay to continue in the 1275 // normal locking code. 1276 // 1277 // FIXME: due to a lack of registers we currently blow away the age 1278 // bits in this situation. Should attempt to preserve them. 1279 NOT_LP64( movptr(swap_reg, saved_mark_addr); ) 1280 load_prototype_header(tmp_reg, obj_reg); 1281 if (os::is_MP()) { 1282 lock(); 1283 } 1284 cmpxchgptr(tmp_reg, mark_addr); // compare tmp_reg and swap_reg 1285 // Fall through to the normal CAS-based lock, because no matter what 1286 // the result of the above CAS, some thread must have succeeded in 1287 // removing the bias bit from the object's header. 1288 if (counters != NULL) { 1289 cond_inc32(Assembler::zero, 1290 ExternalAddress((address) counters->revoked_lock_entry_count_addr())); 1291 } 1292 1293 bind(cas_label); 1294 1295 return null_check_offset; 1296 } 1297 1298 void MacroAssembler::biased_locking_exit(Register obj_reg, Register temp_reg, Label& done) { 1299 assert(UseBiasedLocking, "why call this otherwise?"); 1300 1301 // Check for biased locking unlock case, which is a no-op 1302 // Note: we do not have to check the thread ID for two reasons. 1303 // First, the interpreter checks for IllegalMonitorStateException at 1304 // a higher level. Second, if the bias was revoked while we held the 1305 // lock, the object could not be rebiased toward another thread, so 1306 // the bias bit would be clear. 1307 movptr(temp_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes())); 1308 andptr(temp_reg, markOopDesc::biased_lock_mask_in_place); 1309 cmpptr(temp_reg, markOopDesc::biased_lock_pattern); 1310 jcc(Assembler::equal, done); 1311 } 1312 1313 #ifdef COMPILER2 1314 1315 #if INCLUDE_RTM_OPT 1316 1317 // Update rtm_counters based on abort status 1318 // input: abort_status 1319 // rtm_counters (RTMLockingCounters*) 1320 // flags are killed 1321 void MacroAssembler::rtm_counters_update(Register abort_status, Register rtm_counters) { 1322 1323 atomic_incptr(Address(rtm_counters, RTMLockingCounters::abort_count_offset())); 1324 if (PrintPreciseRTMLockingStatistics) { 1325 for (int i = 0; i < RTMLockingCounters::ABORT_STATUS_LIMIT; i++) { 1326 Label check_abort; 1327 testl(abort_status, (1<<i)); 1328 jccb(Assembler::equal, check_abort); 1329 atomic_incptr(Address(rtm_counters, RTMLockingCounters::abortX_count_offset() + (i * sizeof(uintx)))); 1330 bind(check_abort); 1331 } 1332 } 1333 } 1334 1335 // Branch if (random & (count-1) != 0), count is 2^n 1336 // tmp, scr and flags are killed 1337 void MacroAssembler::branch_on_random_using_rdtsc(Register tmp, Register scr, int count, Label& brLabel) { 1338 assert(tmp == rax, ""); 1339 assert(scr == rdx, ""); 1340 rdtsc(); // modifies EDX:EAX 1341 andptr(tmp, count-1); 1342 jccb(Assembler::notZero, brLabel); 1343 } 1344 1345 // Perform abort ratio calculation, set no_rtm bit if high ratio 1346 // input: rtm_counters_Reg (RTMLockingCounters* address) 1347 // tmpReg, rtm_counters_Reg and flags are killed 1348 void MacroAssembler::rtm_abort_ratio_calculation(Register tmpReg, 1349 Register rtm_counters_Reg, 1350 RTMLockingCounters* rtm_counters, 1351 Metadata* method_data) { 1352 Label L_done, L_check_always_rtm1, L_check_always_rtm2; 1353 1354 if (RTMLockingCalculationDelay > 0) { 1355 // Delay calculation 1356 movptr(tmpReg, ExternalAddress((address) RTMLockingCounters::rtm_calculation_flag_addr()), tmpReg); 1357 testptr(tmpReg, tmpReg); 1358 jccb(Assembler::equal, L_done); 1359 } 1360 // Abort ratio calculation only if abort_count > RTMAbortThreshold 1361 // Aborted transactions = abort_count * 100 1362 // All transactions = total_count * RTMTotalCountIncrRate 1363 // Set no_rtm bit if (Aborted transactions >= All transactions * RTMAbortRatio) 1364 1365 movptr(tmpReg, Address(rtm_counters_Reg, RTMLockingCounters::abort_count_offset())); 1366 cmpptr(tmpReg, RTMAbortThreshold); 1367 jccb(Assembler::below, L_check_always_rtm2); 1368 imulptr(tmpReg, tmpReg, 100); 1369 1370 Register scrReg = rtm_counters_Reg; 1371 movptr(scrReg, Address(rtm_counters_Reg, RTMLockingCounters::total_count_offset())); 1372 imulptr(scrReg, scrReg, RTMTotalCountIncrRate); 1373 imulptr(scrReg, scrReg, RTMAbortRatio); 1374 cmpptr(tmpReg, scrReg); 1375 jccb(Assembler::below, L_check_always_rtm1); 1376 if (method_data != NULL) { 1377 // set rtm_state to "no rtm" in MDO 1378 mov_metadata(tmpReg, method_data); 1379 if (os::is_MP()) { 1380 lock(); 1381 } 1382 orl(Address(tmpReg, MethodData::rtm_state_offset_in_bytes()), NoRTM); 1383 } 1384 jmpb(L_done); 1385 bind(L_check_always_rtm1); 1386 // Reload RTMLockingCounters* address 1387 lea(rtm_counters_Reg, ExternalAddress((address)rtm_counters)); 1388 bind(L_check_always_rtm2); 1389 movptr(tmpReg, Address(rtm_counters_Reg, RTMLockingCounters::total_count_offset())); 1390 cmpptr(tmpReg, RTMLockingThreshold / RTMTotalCountIncrRate); 1391 jccb(Assembler::below, L_done); 1392 if (method_data != NULL) { 1393 // set rtm_state to "always rtm" in MDO 1394 mov_metadata(tmpReg, method_data); 1395 if (os::is_MP()) { 1396 lock(); 1397 } 1398 orl(Address(tmpReg, MethodData::rtm_state_offset_in_bytes()), UseRTM); 1399 } 1400 bind(L_done); 1401 } 1402 1403 // Update counters and perform abort ratio calculation 1404 // input: abort_status_Reg 1405 // rtm_counters_Reg, flags are killed 1406 void MacroAssembler::rtm_profiling(Register abort_status_Reg, 1407 Register rtm_counters_Reg, 1408 RTMLockingCounters* rtm_counters, 1409 Metadata* method_data, 1410 bool profile_rtm) { 1411 1412 assert(rtm_counters != NULL, "should not be NULL when profiling RTM"); 1413 // update rtm counters based on rax value at abort 1414 // reads abort_status_Reg, updates flags 1415 lea(rtm_counters_Reg, ExternalAddress((address)rtm_counters)); 1416 rtm_counters_update(abort_status_Reg, rtm_counters_Reg); 1417 if (profile_rtm) { 1418 // Save abort status because abort_status_Reg is used by following code. 1419 if (RTMRetryCount > 0) { 1420 push(abort_status_Reg); 1421 } 1422 assert(rtm_counters != NULL, "should not be NULL when profiling RTM"); 1423 rtm_abort_ratio_calculation(abort_status_Reg, rtm_counters_Reg, rtm_counters, method_data); 1424 // restore abort status 1425 if (RTMRetryCount > 0) { 1426 pop(abort_status_Reg); 1427 } 1428 } 1429 } 1430 1431 // Retry on abort if abort's status is 0x6: can retry (0x2) | memory conflict (0x4) 1432 // inputs: retry_count_Reg 1433 // : abort_status_Reg 1434 // output: retry_count_Reg decremented by 1 1435 // flags are killed 1436 void MacroAssembler::rtm_retry_lock_on_abort(Register retry_count_Reg, Register abort_status_Reg, Label& retryLabel) { 1437 Label doneRetry; 1438 assert(abort_status_Reg == rax, ""); 1439 // The abort reason bits are in eax (see all states in rtmLocking.hpp) 1440 // 0x6 = conflict on which we can retry (0x2) | memory conflict (0x4) 1441 // if reason is in 0x6 and retry count != 0 then retry 1442 andptr(abort_status_Reg, 0x6); 1443 jccb(Assembler::zero, doneRetry); 1444 testl(retry_count_Reg, retry_count_Reg); 1445 jccb(Assembler::zero, doneRetry); 1446 pause(); 1447 decrementl(retry_count_Reg); 1448 jmp(retryLabel); 1449 bind(doneRetry); 1450 } 1451 1452 // Spin and retry if lock is busy, 1453 // inputs: box_Reg (monitor address) 1454 // : retry_count_Reg 1455 // output: retry_count_Reg decremented by 1 1456 // : clear z flag if retry count exceeded 1457 // tmp_Reg, scr_Reg, flags are killed 1458 void MacroAssembler::rtm_retry_lock_on_busy(Register retry_count_Reg, Register box_Reg, 1459 Register tmp_Reg, Register scr_Reg, Label& retryLabel) { 1460 Label SpinLoop, SpinExit, doneRetry; 1461 int owner_offset = OM_OFFSET_NO_MONITOR_VALUE_TAG(owner); 1462 1463 testl(retry_count_Reg, retry_count_Reg); 1464 jccb(Assembler::zero, doneRetry); 1465 decrementl(retry_count_Reg); 1466 movptr(scr_Reg, RTMSpinLoopCount); 1467 1468 bind(SpinLoop); 1469 pause(); 1470 decrementl(scr_Reg); 1471 jccb(Assembler::lessEqual, SpinExit); 1472 movptr(tmp_Reg, Address(box_Reg, owner_offset)); 1473 testptr(tmp_Reg, tmp_Reg); 1474 jccb(Assembler::notZero, SpinLoop); 1475 1476 bind(SpinExit); 1477 jmp(retryLabel); 1478 bind(doneRetry); 1479 incrementl(retry_count_Reg); // clear z flag 1480 } 1481 1482 // Use RTM for normal stack locks 1483 // Input: objReg (object to lock) 1484 void MacroAssembler::rtm_stack_locking(Register objReg, Register tmpReg, Register scrReg, 1485 Register retry_on_abort_count_Reg, 1486 RTMLockingCounters* stack_rtm_counters, 1487 Metadata* method_data, bool profile_rtm, 1488 Label& DONE_LABEL, Label& IsInflated) { 1489 assert(UseRTMForStackLocks, "why call this otherwise?"); 1490 assert(!UseBiasedLocking, "Biased locking is not supported with RTM locking"); 1491 assert(tmpReg == rax, ""); 1492 assert(scrReg == rdx, ""); 1493 Label L_rtm_retry, L_decrement_retry, L_on_abort; 1494 1495 if (RTMRetryCount > 0) { 1496 movl(retry_on_abort_count_Reg, RTMRetryCount); // Retry on abort 1497 bind(L_rtm_retry); 1498 } 1499 movptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes())); 1500 testptr(tmpReg, markOopDesc::monitor_value); // inflated vs stack-locked|neutral|biased 1501 jcc(Assembler::notZero, IsInflated); 1502 1503 if (PrintPreciseRTMLockingStatistics || profile_rtm) { 1504 Label L_noincrement; 1505 if (RTMTotalCountIncrRate > 1) { 1506 // tmpReg, scrReg and flags are killed 1507 branch_on_random_using_rdtsc(tmpReg, scrReg, RTMTotalCountIncrRate, L_noincrement); 1508 } 1509 assert(stack_rtm_counters != NULL, "should not be NULL when profiling RTM"); 1510 atomic_incptr(ExternalAddress((address)stack_rtm_counters->total_count_addr()), scrReg); 1511 bind(L_noincrement); 1512 } 1513 xbegin(L_on_abort); 1514 movptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes())); // fetch markword 1515 andptr(tmpReg, markOopDesc::biased_lock_mask_in_place); // look at 3 lock bits 1516 cmpptr(tmpReg, markOopDesc::unlocked_value); // bits = 001 unlocked 1517 jcc(Assembler::equal, DONE_LABEL); // all done if unlocked 1518 1519 Register abort_status_Reg = tmpReg; // status of abort is stored in RAX 1520 if (UseRTMXendForLockBusy) { 1521 xend(); 1522 movptr(abort_status_Reg, 0x2); // Set the abort status to 2 (so we can retry) 1523 jmp(L_decrement_retry); 1524 } 1525 else { 1526 xabort(0); 1527 } 1528 bind(L_on_abort); 1529 if (PrintPreciseRTMLockingStatistics || profile_rtm) { 1530 rtm_profiling(abort_status_Reg, scrReg, stack_rtm_counters, method_data, profile_rtm); 1531 } 1532 bind(L_decrement_retry); 1533 if (RTMRetryCount > 0) { 1534 // retry on lock abort if abort status is 'can retry' (0x2) or 'memory conflict' (0x4) 1535 rtm_retry_lock_on_abort(retry_on_abort_count_Reg, abort_status_Reg, L_rtm_retry); 1536 } 1537 } 1538 1539 // Use RTM for inflating locks 1540 // inputs: objReg (object to lock) 1541 // boxReg (on-stack box address (displaced header location) - KILLED) 1542 // tmpReg (ObjectMonitor address + markOopDesc::monitor_value) 1543 void MacroAssembler::rtm_inflated_locking(Register objReg, Register boxReg, Register tmpReg, 1544 Register scrReg, Register retry_on_busy_count_Reg, 1545 Register retry_on_abort_count_Reg, 1546 RTMLockingCounters* rtm_counters, 1547 Metadata* method_data, bool profile_rtm, 1548 Label& DONE_LABEL) { 1549 assert(UseRTMLocking, "why call this otherwise?"); 1550 assert(tmpReg == rax, ""); 1551 assert(scrReg == rdx, ""); 1552 Label L_rtm_retry, L_decrement_retry, L_on_abort; 1553 int owner_offset = OM_OFFSET_NO_MONITOR_VALUE_TAG(owner); 1554 1555 // Without cast to int32_t a movptr will destroy r10 which is typically obj 1556 movptr(Address(boxReg, 0), (int32_t)intptr_t(markOopDesc::unused_mark())); 1557 movptr(boxReg, tmpReg); // Save ObjectMonitor address 1558 1559 if (RTMRetryCount > 0) { 1560 movl(retry_on_busy_count_Reg, RTMRetryCount); // Retry on lock busy 1561 movl(retry_on_abort_count_Reg, RTMRetryCount); // Retry on abort 1562 bind(L_rtm_retry); 1563 } 1564 if (PrintPreciseRTMLockingStatistics || profile_rtm) { 1565 Label L_noincrement; 1566 if (RTMTotalCountIncrRate > 1) { 1567 // tmpReg, scrReg and flags are killed 1568 branch_on_random_using_rdtsc(tmpReg, scrReg, RTMTotalCountIncrRate, L_noincrement); 1569 } 1570 assert(rtm_counters != NULL, "should not be NULL when profiling RTM"); 1571 atomic_incptr(ExternalAddress((address)rtm_counters->total_count_addr()), scrReg); 1572 bind(L_noincrement); 1573 } 1574 xbegin(L_on_abort); 1575 movptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes())); 1576 movptr(tmpReg, Address(tmpReg, owner_offset)); 1577 testptr(tmpReg, tmpReg); 1578 jcc(Assembler::zero, DONE_LABEL); 1579 if (UseRTMXendForLockBusy) { 1580 xend(); 1581 jmp(L_decrement_retry); 1582 } 1583 else { 1584 xabort(0); 1585 } 1586 bind(L_on_abort); 1587 Register abort_status_Reg = tmpReg; // status of abort is stored in RAX 1588 if (PrintPreciseRTMLockingStatistics || profile_rtm) { 1589 rtm_profiling(abort_status_Reg, scrReg, rtm_counters, method_data, profile_rtm); 1590 } 1591 if (RTMRetryCount > 0) { 1592 // retry on lock abort if abort status is 'can retry' (0x2) or 'memory conflict' (0x4) 1593 rtm_retry_lock_on_abort(retry_on_abort_count_Reg, abort_status_Reg, L_rtm_retry); 1594 } 1595 1596 movptr(tmpReg, Address(boxReg, owner_offset)) ; 1597 testptr(tmpReg, tmpReg) ; 1598 jccb(Assembler::notZero, L_decrement_retry) ; 1599 1600 // Appears unlocked - try to swing _owner from null to non-null. 1601 // Invariant: tmpReg == 0. tmpReg is EAX which is the implicit cmpxchg comparand. 1602 #ifdef _LP64 1603 Register threadReg = r15_thread; 1604 #else 1605 get_thread(scrReg); 1606 Register threadReg = scrReg; 1607 #endif 1608 if (os::is_MP()) { 1609 lock(); 1610 } 1611 cmpxchgptr(threadReg, Address(boxReg, owner_offset)); // Updates tmpReg 1612 1613 if (RTMRetryCount > 0) { 1614 // success done else retry 1615 jccb(Assembler::equal, DONE_LABEL) ; 1616 bind(L_decrement_retry); 1617 // Spin and retry if lock is busy. 1618 rtm_retry_lock_on_busy(retry_on_busy_count_Reg, boxReg, tmpReg, scrReg, L_rtm_retry); 1619 } 1620 else { 1621 bind(L_decrement_retry); 1622 } 1623 } 1624 1625 #endif // INCLUDE_RTM_OPT 1626 1627 // Fast_Lock and Fast_Unlock used by C2 1628 1629 // Because the transitions from emitted code to the runtime 1630 // monitorenter/exit helper stubs are so slow it's critical that 1631 // we inline both the stack-locking fast-path and the inflated fast path. 1632 // 1633 // See also: cmpFastLock and cmpFastUnlock. 1634 // 1635 // What follows is a specialized inline transliteration of the code 1636 // in slow_enter() and slow_exit(). If we're concerned about I$ bloat 1637 // another option would be to emit TrySlowEnter and TrySlowExit methods 1638 // at startup-time. These methods would accept arguments as 1639 // (rax,=Obj, rbx=Self, rcx=box, rdx=Scratch) and return success-failure 1640 // indications in the icc.ZFlag. Fast_Lock and Fast_Unlock would simply 1641 // marshal the arguments and emit calls to TrySlowEnter and TrySlowExit. 1642 // In practice, however, the # of lock sites is bounded and is usually small. 1643 // Besides the call overhead, TrySlowEnter and TrySlowExit might suffer 1644 // if the processor uses simple bimodal branch predictors keyed by EIP 1645 // Since the helper routines would be called from multiple synchronization 1646 // sites. 1647 // 1648 // An even better approach would be write "MonitorEnter()" and "MonitorExit()" 1649 // in java - using j.u.c and unsafe - and just bind the lock and unlock sites 1650 // to those specialized methods. That'd give us a mostly platform-independent 1651 // implementation that the JITs could optimize and inline at their pleasure. 1652 // Done correctly, the only time we'd need to cross to native could would be 1653 // to park() or unpark() threads. We'd also need a few more unsafe operators 1654 // to (a) prevent compiler-JIT reordering of non-volatile accesses, and 1655 // (b) explicit barriers or fence operations. 1656 // 1657 // TODO: 1658 // 1659 // * Arrange for C2 to pass "Self" into Fast_Lock and Fast_Unlock in one of the registers (scr). 1660 // This avoids manifesting the Self pointer in the Fast_Lock and Fast_Unlock terminals. 1661 // Given TLAB allocation, Self is usually manifested in a register, so passing it into 1662 // the lock operators would typically be faster than reifying Self. 1663 // 1664 // * Ideally I'd define the primitives as: 1665 // fast_lock (nax Obj, nax box, EAX tmp, nax scr) where box, tmp and scr are KILLED. 1666 // fast_unlock (nax Obj, EAX box, nax tmp) where box and tmp are KILLED 1667 // Unfortunately ADLC bugs prevent us from expressing the ideal form. 1668 // Instead, we're stuck with a rather awkward and brittle register assignments below. 1669 // Furthermore the register assignments are overconstrained, possibly resulting in 1670 // sub-optimal code near the synchronization site. 1671 // 1672 // * Eliminate the sp-proximity tests and just use "== Self" tests instead. 1673 // Alternately, use a better sp-proximity test. 1674 // 1675 // * Currently ObjectMonitor._Owner can hold either an sp value or a (THREAD *) value. 1676 // Either one is sufficient to uniquely identify a thread. 1677 // TODO: eliminate use of sp in _owner and use get_thread(tr) instead. 1678 // 1679 // * Intrinsify notify() and notifyAll() for the common cases where the 1680 // object is locked by the calling thread but the waitlist is empty. 1681 // avoid the expensive JNI call to JVM_Notify() and JVM_NotifyAll(). 1682 // 1683 // * use jccb and jmpb instead of jcc and jmp to improve code density. 1684 // But beware of excessive branch density on AMD Opterons. 1685 // 1686 // * Both Fast_Lock and Fast_Unlock set the ICC.ZF to indicate success 1687 // or failure of the fast-path. If the fast-path fails then we pass 1688 // control to the slow-path, typically in C. In Fast_Lock and 1689 // Fast_Unlock we often branch to DONE_LABEL, just to find that C2 1690 // will emit a conditional branch immediately after the node. 1691 // So we have branches to branches and lots of ICC.ZF games. 1692 // Instead, it might be better to have C2 pass a "FailureLabel" 1693 // into Fast_Lock and Fast_Unlock. In the case of success, control 1694 // will drop through the node. ICC.ZF is undefined at exit. 1695 // In the case of failure, the node will branch directly to the 1696 // FailureLabel 1697 1698 1699 // obj: object to lock 1700 // box: on-stack box address (displaced header location) - KILLED 1701 // rax,: tmp -- KILLED 1702 // scr: tmp -- KILLED 1703 void MacroAssembler::fast_lock(Register objReg, Register boxReg, Register tmpReg, 1704 Register scrReg, Register cx1Reg, Register cx2Reg, 1705 BiasedLockingCounters* counters, 1706 RTMLockingCounters* rtm_counters, 1707 RTMLockingCounters* stack_rtm_counters, 1708 Metadata* method_data, 1709 bool use_rtm, bool profile_rtm) { 1710 // Ensure the register assignments are disjoint 1711 assert(tmpReg == rax, ""); 1712 1713 if (use_rtm) { 1714 assert_different_registers(objReg, boxReg, tmpReg, scrReg, cx1Reg, cx2Reg); 1715 } else { 1716 assert(cx1Reg == noreg, ""); 1717 assert(cx2Reg == noreg, ""); 1718 assert_different_registers(objReg, boxReg, tmpReg, scrReg); 1719 } 1720 1721 if (counters != NULL) { 1722 atomic_incl(ExternalAddress((address)counters->total_entry_count_addr()), scrReg); 1723 } 1724 if (EmitSync & 1) { 1725 // set box->dhw = markOopDesc::unused_mark() 1726 // Force all sync thru slow-path: slow_enter() and slow_exit() 1727 movptr (Address(boxReg, 0), (int32_t)intptr_t(markOopDesc::unused_mark())); 1728 cmpptr (rsp, (int32_t)NULL_WORD); 1729 } else { 1730 // Possible cases that we'll encounter in fast_lock 1731 // ------------------------------------------------ 1732 // * Inflated 1733 // -- unlocked 1734 // -- Locked 1735 // = by self 1736 // = by other 1737 // * biased 1738 // -- by Self 1739 // -- by other 1740 // * neutral 1741 // * stack-locked 1742 // -- by self 1743 // = sp-proximity test hits 1744 // = sp-proximity test generates false-negative 1745 // -- by other 1746 // 1747 1748 Label IsInflated, DONE_LABEL; 1749 1750 // it's stack-locked, biased or neutral 1751 // TODO: optimize away redundant LDs of obj->mark and improve the markword triage 1752 // order to reduce the number of conditional branches in the most common cases. 1753 // Beware -- there's a subtle invariant that fetch of the markword 1754 // at [FETCH], below, will never observe a biased encoding (*101b). 1755 // If this invariant is not held we risk exclusion (safety) failure. 1756 if (UseBiasedLocking && !UseOptoBiasInlining) { 1757 biased_locking_enter(boxReg, objReg, tmpReg, scrReg, false, DONE_LABEL, NULL, counters); 1758 } 1759 1760 #if INCLUDE_RTM_OPT 1761 if (UseRTMForStackLocks && use_rtm) { 1762 rtm_stack_locking(objReg, tmpReg, scrReg, cx2Reg, 1763 stack_rtm_counters, method_data, profile_rtm, 1764 DONE_LABEL, IsInflated); 1765 } 1766 #endif // INCLUDE_RTM_OPT 1767 1768 movptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes())); // [FETCH] 1769 testptr(tmpReg, markOopDesc::monitor_value); // inflated vs stack-locked|neutral|biased 1770 jccb(Assembler::notZero, IsInflated); 1771 1772 // Attempt stack-locking ... 1773 orptr (tmpReg, markOopDesc::unlocked_value); 1774 movptr(Address(boxReg, 0), tmpReg); // Anticipate successful CAS 1775 if (os::is_MP()) { 1776 lock(); 1777 } 1778 cmpxchgptr(boxReg, Address(objReg, oopDesc::mark_offset_in_bytes())); // Updates tmpReg 1779 if (counters != NULL) { 1780 cond_inc32(Assembler::equal, 1781 ExternalAddress((address)counters->fast_path_entry_count_addr())); 1782 } 1783 jcc(Assembler::equal, DONE_LABEL); // Success 1784 1785 // Recursive locking. 1786 // The object is stack-locked: markword contains stack pointer to BasicLock. 1787 // Locked by current thread if difference with current SP is less than one page. 1788 subptr(tmpReg, rsp); 1789 // Next instruction set ZFlag == 1 (Success) if difference is less then one page. 1790 andptr(tmpReg, (int32_t) (NOT_LP64(0xFFFFF003) LP64_ONLY(7 - os::vm_page_size())) ); 1791 movptr(Address(boxReg, 0), tmpReg); 1792 if (counters != NULL) { 1793 cond_inc32(Assembler::equal, 1794 ExternalAddress((address)counters->fast_path_entry_count_addr())); 1795 } 1796 jmp(DONE_LABEL); 1797 1798 bind(IsInflated); 1799 // The object is inflated. tmpReg contains pointer to ObjectMonitor* + markOopDesc::monitor_value 1800 1801 #if INCLUDE_RTM_OPT 1802 // Use the same RTM locking code in 32- and 64-bit VM. 1803 if (use_rtm) { 1804 rtm_inflated_locking(objReg, boxReg, tmpReg, scrReg, cx1Reg, cx2Reg, 1805 rtm_counters, method_data, profile_rtm, DONE_LABEL); 1806 } else { 1807 #endif // INCLUDE_RTM_OPT 1808 1809 #ifndef _LP64 1810 // The object is inflated. 1811 1812 // boxReg refers to the on-stack BasicLock in the current frame. 1813 // We'd like to write: 1814 // set box->_displaced_header = markOopDesc::unused_mark(). Any non-0 value suffices. 1815 // This is convenient but results a ST-before-CAS penalty. The following CAS suffers 1816 // additional latency as we have another ST in the store buffer that must drain. 1817 1818 if (EmitSync & 8192) { 1819 movptr(Address(boxReg, 0), 3); // results in ST-before-CAS penalty 1820 get_thread (scrReg); 1821 movptr(boxReg, tmpReg); // consider: LEA box, [tmp-2] 1822 movptr(tmpReg, NULL_WORD); // consider: xor vs mov 1823 if (os::is_MP()) { 1824 lock(); 1825 } 1826 cmpxchgptr(scrReg, Address(boxReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 1827 } else 1828 if ((EmitSync & 128) == 0) { // avoid ST-before-CAS 1829 // register juggle because we need tmpReg for cmpxchgptr below 1830 movptr(scrReg, boxReg); 1831 movptr(boxReg, tmpReg); // consider: LEA box, [tmp-2] 1832 1833 // Using a prefetchw helps avoid later RTS->RTO upgrades and cache probes 1834 if ((EmitSync & 2048) && VM_Version::supports_3dnow_prefetch() && os::is_MP()) { 1835 // prefetchw [eax + Offset(_owner)-2] 1836 prefetchw(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 1837 } 1838 1839 if ((EmitSync & 64) == 0) { 1840 // Optimistic form: consider XORL tmpReg,tmpReg 1841 movptr(tmpReg, NULL_WORD); 1842 } else { 1843 // Can suffer RTS->RTO upgrades on shared or cold $ lines 1844 // Test-And-CAS instead of CAS 1845 movptr(tmpReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); // rax, = m->_owner 1846 testptr(tmpReg, tmpReg); // Locked ? 1847 jccb (Assembler::notZero, DONE_LABEL); 1848 } 1849 1850 // Appears unlocked - try to swing _owner from null to non-null. 1851 // Ideally, I'd manifest "Self" with get_thread and then attempt 1852 // to CAS the register containing Self into m->Owner. 1853 // But we don't have enough registers, so instead we can either try to CAS 1854 // rsp or the address of the box (in scr) into &m->owner. If the CAS succeeds 1855 // we later store "Self" into m->Owner. Transiently storing a stack address 1856 // (rsp or the address of the box) into m->owner is harmless. 1857 // Invariant: tmpReg == 0. tmpReg is EAX which is the implicit cmpxchg comparand. 1858 if (os::is_MP()) { 1859 lock(); 1860 } 1861 cmpxchgptr(scrReg, Address(boxReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 1862 movptr(Address(scrReg, 0), 3); // box->_displaced_header = 3 1863 // If we weren't able to swing _owner from NULL to the BasicLock 1864 // then take the slow path. 1865 jccb (Assembler::notZero, DONE_LABEL); 1866 // update _owner from BasicLock to thread 1867 get_thread (scrReg); // beware: clobbers ICCs 1868 movptr(Address(boxReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), scrReg); 1869 xorptr(boxReg, boxReg); // set icc.ZFlag = 1 to indicate success 1870 1871 // If the CAS fails we can either retry or pass control to the slow-path. 1872 // We use the latter tactic. 1873 // Pass the CAS result in the icc.ZFlag into DONE_LABEL 1874 // If the CAS was successful ... 1875 // Self has acquired the lock 1876 // Invariant: m->_recursions should already be 0, so we don't need to explicitly set it. 1877 // Intentional fall-through into DONE_LABEL ... 1878 } else { 1879 movptr(Address(boxReg, 0), intptr_t(markOopDesc::unused_mark())); // results in ST-before-CAS penalty 1880 movptr(boxReg, tmpReg); 1881 1882 // Using a prefetchw helps avoid later RTS->RTO upgrades and cache probes 1883 if ((EmitSync & 2048) && VM_Version::supports_3dnow_prefetch() && os::is_MP()) { 1884 // prefetchw [eax + Offset(_owner)-2] 1885 prefetchw(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 1886 } 1887 1888 if ((EmitSync & 64) == 0) { 1889 // Optimistic form 1890 xorptr (tmpReg, tmpReg); 1891 } else { 1892 // Can suffer RTS->RTO upgrades on shared or cold $ lines 1893 movptr(tmpReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); // rax, = m->_owner 1894 testptr(tmpReg, tmpReg); // Locked ? 1895 jccb (Assembler::notZero, DONE_LABEL); 1896 } 1897 1898 // Appears unlocked - try to swing _owner from null to non-null. 1899 // Use either "Self" (in scr) or rsp as thread identity in _owner. 1900 // Invariant: tmpReg == 0. tmpReg is EAX which is the implicit cmpxchg comparand. 1901 get_thread (scrReg); 1902 if (os::is_MP()) { 1903 lock(); 1904 } 1905 cmpxchgptr(scrReg, Address(boxReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 1906 1907 // If the CAS fails we can either retry or pass control to the slow-path. 1908 // We use the latter tactic. 1909 // Pass the CAS result in the icc.ZFlag into DONE_LABEL 1910 // If the CAS was successful ... 1911 // Self has acquired the lock 1912 // Invariant: m->_recursions should already be 0, so we don't need to explicitly set it. 1913 // Intentional fall-through into DONE_LABEL ... 1914 } 1915 #else // _LP64 1916 // It's inflated 1917 movq(scrReg, tmpReg); 1918 xorq(tmpReg, tmpReg); 1919 1920 if (os::is_MP()) { 1921 lock(); 1922 } 1923 cmpxchgptr(r15_thread, Address(scrReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 1924 // Unconditionally set box->_displaced_header = markOopDesc::unused_mark(). 1925 // Without cast to int32_t movptr will destroy r10 which is typically obj. 1926 movptr(Address(boxReg, 0), (int32_t)intptr_t(markOopDesc::unused_mark())); 1927 // Intentional fall-through into DONE_LABEL ... 1928 // Propagate ICC.ZF from CAS above into DONE_LABEL. 1929 #endif // _LP64 1930 #if INCLUDE_RTM_OPT 1931 } // use_rtm() 1932 #endif 1933 // DONE_LABEL is a hot target - we'd really like to place it at the 1934 // start of cache line by padding with NOPs. 1935 // See the AMD and Intel software optimization manuals for the 1936 // most efficient "long" NOP encodings. 1937 // Unfortunately none of our alignment mechanisms suffice. 1938 bind(DONE_LABEL); 1939 1940 // At DONE_LABEL the icc ZFlag is set as follows ... 1941 // Fast_Unlock uses the same protocol. 1942 // ZFlag == 1 -> Success 1943 // ZFlag == 0 -> Failure - force control through the slow-path 1944 } 1945 } 1946 1947 // obj: object to unlock 1948 // box: box address (displaced header location), killed. Must be EAX. 1949 // tmp: killed, cannot be obj nor box. 1950 // 1951 // Some commentary on balanced locking: 1952 // 1953 // Fast_Lock and Fast_Unlock are emitted only for provably balanced lock sites. 1954 // Methods that don't have provably balanced locking are forced to run in the 1955 // interpreter - such methods won't be compiled to use fast_lock and fast_unlock. 1956 // The interpreter provides two properties: 1957 // I1: At return-time the interpreter automatically and quietly unlocks any 1958 // objects acquired the current activation (frame). Recall that the 1959 // interpreter maintains an on-stack list of locks currently held by 1960 // a frame. 1961 // I2: If a method attempts to unlock an object that is not held by the 1962 // the frame the interpreter throws IMSX. 1963 // 1964 // Lets say A(), which has provably balanced locking, acquires O and then calls B(). 1965 // B() doesn't have provably balanced locking so it runs in the interpreter. 1966 // Control returns to A() and A() unlocks O. By I1 and I2, above, we know that O 1967 // is still locked by A(). 1968 // 1969 // The only other source of unbalanced locking would be JNI. The "Java Native Interface: 1970 // Programmer's Guide and Specification" claims that an object locked by jni_monitorenter 1971 // should not be unlocked by "normal" java-level locking and vice-versa. The specification 1972 // doesn't specify what will occur if a program engages in such mixed-mode locking, however. 1973 // Arguably given that the spec legislates the JNI case as undefined our implementation 1974 // could reasonably *avoid* checking owner in Fast_Unlock(). 1975 // In the interest of performance we elide m->Owner==Self check in unlock. 1976 // A perfectly viable alternative is to elide the owner check except when 1977 // Xcheck:jni is enabled. 1978 1979 void MacroAssembler::fast_unlock(Register objReg, Register boxReg, Register tmpReg, bool use_rtm) { 1980 assert(boxReg == rax, ""); 1981 assert_different_registers(objReg, boxReg, tmpReg); 1982 1983 if (EmitSync & 4) { 1984 // Disable - inhibit all inlining. Force control through the slow-path 1985 cmpptr (rsp, 0); 1986 } else { 1987 Label DONE_LABEL, Stacked, CheckSucc; 1988 1989 // Critically, the biased locking test must have precedence over 1990 // and appear before the (box->dhw == 0) recursive stack-lock test. 1991 if (UseBiasedLocking && !UseOptoBiasInlining) { 1992 biased_locking_exit(objReg, tmpReg, DONE_LABEL); 1993 } 1994 1995 #if INCLUDE_RTM_OPT 1996 if (UseRTMForStackLocks && use_rtm) { 1997 assert(!UseBiasedLocking, "Biased locking is not supported with RTM locking"); 1998 Label L_regular_unlock; 1999 movptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes())); // fetch markword 2000 andptr(tmpReg, markOopDesc::biased_lock_mask_in_place); // look at 3 lock bits 2001 cmpptr(tmpReg, markOopDesc::unlocked_value); // bits = 001 unlocked 2002 jccb(Assembler::notEqual, L_regular_unlock); // if !HLE RegularLock 2003 xend(); // otherwise end... 2004 jmp(DONE_LABEL); // ... and we're done 2005 bind(L_regular_unlock); 2006 } 2007 #endif 2008 2009 cmpptr(Address(boxReg, 0), (int32_t)NULL_WORD); // Examine the displaced header 2010 jcc (Assembler::zero, DONE_LABEL); // 0 indicates recursive stack-lock 2011 movptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes())); // Examine the object's markword 2012 testptr(tmpReg, markOopDesc::monitor_value); // Inflated? 2013 jccb (Assembler::zero, Stacked); 2014 2015 // It's inflated. 2016 #if INCLUDE_RTM_OPT 2017 if (use_rtm) { 2018 Label L_regular_inflated_unlock; 2019 int owner_offset = OM_OFFSET_NO_MONITOR_VALUE_TAG(owner); 2020 movptr(boxReg, Address(tmpReg, owner_offset)); 2021 testptr(boxReg, boxReg); 2022 jccb(Assembler::notZero, L_regular_inflated_unlock); 2023 xend(); 2024 jmpb(DONE_LABEL); 2025 bind(L_regular_inflated_unlock); 2026 } 2027 #endif 2028 2029 // Despite our balanced locking property we still check that m->_owner == Self 2030 // as java routines or native JNI code called by this thread might 2031 // have released the lock. 2032 // Refer to the comments in synchronizer.cpp for how we might encode extra 2033 // state in _succ so we can avoid fetching EntryList|cxq. 2034 // 2035 // I'd like to add more cases in fast_lock() and fast_unlock() -- 2036 // such as recursive enter and exit -- but we have to be wary of 2037 // I$ bloat, T$ effects and BP$ effects. 2038 // 2039 // If there's no contention try a 1-0 exit. That is, exit without 2040 // a costly MEMBAR or CAS. See synchronizer.cpp for details on how 2041 // we detect and recover from the race that the 1-0 exit admits. 2042 // 2043 // Conceptually Fast_Unlock() must execute a STST|LDST "release" barrier 2044 // before it STs null into _owner, releasing the lock. Updates 2045 // to data protected by the critical section must be visible before 2046 // we drop the lock (and thus before any other thread could acquire 2047 // the lock and observe the fields protected by the lock). 2048 // IA32's memory-model is SPO, so STs are ordered with respect to 2049 // each other and there's no need for an explicit barrier (fence). 2050 // See also http://gee.cs.oswego.edu/dl/jmm/cookbook.html. 2051 #ifndef _LP64 2052 get_thread (boxReg); 2053 if ((EmitSync & 4096) && VM_Version::supports_3dnow_prefetch() && os::is_MP()) { 2054 // prefetchw [ebx + Offset(_owner)-2] 2055 prefetchw(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 2056 } 2057 2058 // Note that we could employ various encoding schemes to reduce 2059 // the number of loads below (currently 4) to just 2 or 3. 2060 // Refer to the comments in synchronizer.cpp. 2061 // In practice the chain of fetches doesn't seem to impact performance, however. 2062 xorptr(boxReg, boxReg); 2063 if ((EmitSync & 65536) == 0 && (EmitSync & 256)) { 2064 // Attempt to reduce branch density - AMD's branch predictor. 2065 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(recursions))); 2066 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(EntryList))); 2067 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(cxq))); 2068 jccb (Assembler::notZero, DONE_LABEL); 2069 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), NULL_WORD); 2070 jmpb (DONE_LABEL); 2071 } else { 2072 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(recursions))); 2073 jccb (Assembler::notZero, DONE_LABEL); 2074 movptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(EntryList))); 2075 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(cxq))); 2076 jccb (Assembler::notZero, CheckSucc); 2077 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), NULL_WORD); 2078 jmpb (DONE_LABEL); 2079 } 2080 2081 // The Following code fragment (EmitSync & 65536) improves the performance of 2082 // contended applications and contended synchronization microbenchmarks. 2083 // Unfortunately the emission of the code - even though not executed - causes regressions 2084 // in scimark and jetstream, evidently because of $ effects. Replacing the code 2085 // with an equal number of never-executed NOPs results in the same regression. 2086 // We leave it off by default. 2087 2088 if ((EmitSync & 65536) != 0) { 2089 Label LSuccess, LGoSlowPath ; 2090 2091 bind (CheckSucc); 2092 2093 // Optional pre-test ... it's safe to elide this 2094 cmpptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(succ)), (int32_t)NULL_WORD); 2095 jccb(Assembler::zero, LGoSlowPath); 2096 2097 // We have a classic Dekker-style idiom: 2098 // ST m->_owner = 0 ; MEMBAR; LD m->_succ 2099 // There are a number of ways to implement the barrier: 2100 // (1) lock:andl &m->_owner, 0 2101 // is fast, but mask doesn't currently support the "ANDL M,IMM32" form. 2102 // LOCK: ANDL [ebx+Offset(_Owner)-2], 0 2103 // Encodes as 81 31 OFF32 IMM32 or 83 63 OFF8 IMM8 2104 // (2) If supported, an explicit MFENCE is appealing. 2105 // In older IA32 processors MFENCE is slower than lock:add or xchg 2106 // particularly if the write-buffer is full as might be the case if 2107 // if stores closely precede the fence or fence-equivalent instruction. 2108 // See https://blogs.oracle.com/dave/entry/instruction_selection_for_volatile_fences 2109 // as the situation has changed with Nehalem and Shanghai. 2110 // (3) In lieu of an explicit fence, use lock:addl to the top-of-stack 2111 // The $lines underlying the top-of-stack should be in M-state. 2112 // The locked add instruction is serializing, of course. 2113 // (4) Use xchg, which is serializing 2114 // mov boxReg, 0; xchgl boxReg, [tmpReg + Offset(_owner)-2] also works 2115 // (5) ST m->_owner = 0 and then execute lock:orl &m->_succ, 0. 2116 // The integer condition codes will tell us if succ was 0. 2117 // Since _succ and _owner should reside in the same $line and 2118 // we just stored into _owner, it's likely that the $line 2119 // remains in M-state for the lock:orl. 2120 // 2121 // We currently use (3), although it's likely that switching to (2) 2122 // is correct for the future. 2123 2124 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), NULL_WORD); 2125 if (os::is_MP()) { 2126 lock(); addptr(Address(rsp, 0), 0); 2127 } 2128 // Ratify _succ remains non-null 2129 cmpptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(succ)), 0); 2130 jccb (Assembler::notZero, LSuccess); 2131 2132 xorptr(boxReg, boxReg); // box is really EAX 2133 if (os::is_MP()) { lock(); } 2134 cmpxchgptr(rsp, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 2135 // There's no successor so we tried to regrab the lock with the 2136 // placeholder value. If that didn't work, then another thread 2137 // grabbed the lock so we're done (and exit was a success). 2138 jccb (Assembler::notEqual, LSuccess); 2139 // Since we're low on registers we installed rsp as a placeholding in _owner. 2140 // Now install Self over rsp. This is safe as we're transitioning from 2141 // non-null to non=null 2142 get_thread (boxReg); 2143 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), boxReg); 2144 // Intentional fall-through into LGoSlowPath ... 2145 2146 bind (LGoSlowPath); 2147 orptr(boxReg, 1); // set ICC.ZF=0 to indicate failure 2148 jmpb (DONE_LABEL); 2149 2150 bind (LSuccess); 2151 xorptr(boxReg, boxReg); // set ICC.ZF=1 to indicate success 2152 jmpb (DONE_LABEL); 2153 } 2154 2155 bind (Stacked); 2156 // It's not inflated and it's not recursively stack-locked and it's not biased. 2157 // It must be stack-locked. 2158 // Try to reset the header to displaced header. 2159 // The "box" value on the stack is stable, so we can reload 2160 // and be assured we observe the same value as above. 2161 movptr(tmpReg, Address(boxReg, 0)); 2162 if (os::is_MP()) { 2163 lock(); 2164 } 2165 cmpxchgptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes())); // Uses RAX which is box 2166 // Intention fall-thru into DONE_LABEL 2167 2168 // DONE_LABEL is a hot target - we'd really like to place it at the 2169 // start of cache line by padding with NOPs. 2170 // See the AMD and Intel software optimization manuals for the 2171 // most efficient "long" NOP encodings. 2172 // Unfortunately none of our alignment mechanisms suffice. 2173 if ((EmitSync & 65536) == 0) { 2174 bind (CheckSucc); 2175 } 2176 #else // _LP64 2177 // It's inflated 2178 if (EmitSync & 1024) { 2179 // Emit code to check that _owner == Self 2180 // We could fold the _owner test into subsequent code more efficiently 2181 // than using a stand-alone check, but since _owner checking is off by 2182 // default we don't bother. We also might consider predicating the 2183 // _owner==Self check on Xcheck:jni or running on a debug build. 2184 movptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 2185 xorptr(boxReg, r15_thread); 2186 } else { 2187 xorptr(boxReg, boxReg); 2188 } 2189 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(recursions))); 2190 jccb (Assembler::notZero, DONE_LABEL); 2191 movptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(cxq))); 2192 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(EntryList))); 2193 jccb (Assembler::notZero, CheckSucc); 2194 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), (int32_t)NULL_WORD); 2195 jmpb (DONE_LABEL); 2196 2197 if ((EmitSync & 65536) == 0) { 2198 // Try to avoid passing control into the slow_path ... 2199 Label LSuccess, LGoSlowPath ; 2200 bind (CheckSucc); 2201 2202 // The following optional optimization can be elided if necessary 2203 // Effectively: if (succ == null) goto SlowPath 2204 // The code reduces the window for a race, however, 2205 // and thus benefits performance. 2206 cmpptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(succ)), (int32_t)NULL_WORD); 2207 jccb (Assembler::zero, LGoSlowPath); 2208 2209 xorptr(boxReg, boxReg); 2210 if ((EmitSync & 16) && os::is_MP()) { 2211 xchgptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 2212 } else { 2213 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), (int32_t)NULL_WORD); 2214 if (os::is_MP()) { 2215 // Memory barrier/fence 2216 // Dekker pivot point -- fulcrum : ST Owner; MEMBAR; LD Succ 2217 // Instead of MFENCE we use a dummy locked add of 0 to the top-of-stack. 2218 // This is faster on Nehalem and AMD Shanghai/Barcelona. 2219 // See https://blogs.oracle.com/dave/entry/instruction_selection_for_volatile_fences 2220 // We might also restructure (ST Owner=0;barrier;LD _Succ) to 2221 // (mov box,0; xchgq box, &m->Owner; LD _succ) . 2222 lock(); addl(Address(rsp, 0), 0); 2223 } 2224 } 2225 cmpptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(succ)), (int32_t)NULL_WORD); 2226 jccb (Assembler::notZero, LSuccess); 2227 2228 // Rare inopportune interleaving - race. 2229 // The successor vanished in the small window above. 2230 // The lock is contended -- (cxq|EntryList) != null -- and there's no apparent successor. 2231 // We need to ensure progress and succession. 2232 // Try to reacquire the lock. 2233 // If that fails then the new owner is responsible for succession and this 2234 // thread needs to take no further action and can exit via the fast path (success). 2235 // If the re-acquire succeeds then pass control into the slow path. 2236 // As implemented, this latter mode is horrible because we generated more 2237 // coherence traffic on the lock *and* artifically extended the critical section 2238 // length while by virtue of passing control into the slow path. 2239 2240 // box is really RAX -- the following CMPXCHG depends on that binding 2241 // cmpxchg R,[M] is equivalent to rax = CAS(M,rax,R) 2242 if (os::is_MP()) { lock(); } 2243 cmpxchgptr(r15_thread, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 2244 // There's no successor so we tried to regrab the lock. 2245 // If that didn't work, then another thread grabbed the 2246 // lock so we're done (and exit was a success). 2247 jccb (Assembler::notEqual, LSuccess); 2248 // Intentional fall-through into slow-path 2249 2250 bind (LGoSlowPath); 2251 orl (boxReg, 1); // set ICC.ZF=0 to indicate failure 2252 jmpb (DONE_LABEL); 2253 2254 bind (LSuccess); 2255 testl (boxReg, 0); // set ICC.ZF=1 to indicate success 2256 jmpb (DONE_LABEL); 2257 } 2258 2259 bind (Stacked); 2260 movptr(tmpReg, Address (boxReg, 0)); // re-fetch 2261 if (os::is_MP()) { lock(); } 2262 cmpxchgptr(tmpReg, Address(objReg, oopDesc::mark_offset_in_bytes())); // Uses RAX which is box 2263 2264 if (EmitSync & 65536) { 2265 bind (CheckSucc); 2266 } 2267 #endif 2268 bind(DONE_LABEL); 2269 } 2270 } 2271 #endif // COMPILER2 2272 2273 void MacroAssembler::c2bool(Register x) { 2274 // implements x == 0 ? 0 : 1 2275 // note: must only look at least-significant byte of x 2276 // since C-style booleans are stored in one byte 2277 // only! (was bug) 2278 andl(x, 0xFF); 2279 setb(Assembler::notZero, x); 2280 } 2281 2282 // Wouldn't need if AddressLiteral version had new name 2283 void MacroAssembler::call(Label& L, relocInfo::relocType rtype) { 2284 Assembler::call(L, rtype); 2285 } 2286 2287 void MacroAssembler::call(Register entry) { 2288 Assembler::call(entry); 2289 } 2290 2291 void MacroAssembler::call(AddressLiteral entry) { 2292 if (reachable(entry)) { 2293 Assembler::call_literal(entry.target(), entry.rspec()); 2294 } else { 2295 lea(rscratch1, entry); 2296 Assembler::call(rscratch1); 2297 } 2298 } 2299 2300 void MacroAssembler::ic_call(address entry, jint method_index) { 2301 RelocationHolder rh = virtual_call_Relocation::spec(pc(), method_index); 2302 movptr(rax, (intptr_t)Universe::non_oop_word()); 2303 call(AddressLiteral(entry, rh)); 2304 } 2305 2306 // Implementation of call_VM versions 2307 2308 void MacroAssembler::call_VM(Register oop_result, 2309 address entry_point, 2310 bool check_exceptions) { 2311 Label C, E; 2312 call(C, relocInfo::none); 2313 jmp(E); 2314 2315 bind(C); 2316 call_VM_helper(oop_result, entry_point, 0, check_exceptions); 2317 ret(0); 2318 2319 bind(E); 2320 } 2321 2322 void MacroAssembler::call_VM(Register oop_result, 2323 address entry_point, 2324 Register arg_1, 2325 bool check_exceptions) { 2326 Label C, E; 2327 call(C, relocInfo::none); 2328 jmp(E); 2329 2330 bind(C); 2331 pass_arg1(this, arg_1); 2332 call_VM_helper(oop_result, entry_point, 1, check_exceptions); 2333 ret(0); 2334 2335 bind(E); 2336 } 2337 2338 void MacroAssembler::call_VM(Register oop_result, 2339 address entry_point, 2340 Register arg_1, 2341 Register arg_2, 2342 bool check_exceptions) { 2343 Label C, E; 2344 call(C, relocInfo::none); 2345 jmp(E); 2346 2347 bind(C); 2348 2349 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 2350 2351 pass_arg2(this, arg_2); 2352 pass_arg1(this, arg_1); 2353 call_VM_helper(oop_result, entry_point, 2, check_exceptions); 2354 ret(0); 2355 2356 bind(E); 2357 } 2358 2359 void MacroAssembler::call_VM(Register oop_result, 2360 address entry_point, 2361 Register arg_1, 2362 Register arg_2, 2363 Register arg_3, 2364 bool check_exceptions) { 2365 Label C, E; 2366 call(C, relocInfo::none); 2367 jmp(E); 2368 2369 bind(C); 2370 2371 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); 2372 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); 2373 pass_arg3(this, arg_3); 2374 2375 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 2376 pass_arg2(this, arg_2); 2377 2378 pass_arg1(this, arg_1); 2379 call_VM_helper(oop_result, entry_point, 3, check_exceptions); 2380 ret(0); 2381 2382 bind(E); 2383 } 2384 2385 void MacroAssembler::call_VM(Register oop_result, 2386 Register last_java_sp, 2387 address entry_point, 2388 int number_of_arguments, 2389 bool check_exceptions) { 2390 Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg); 2391 call_VM_base(oop_result, thread, last_java_sp, entry_point, number_of_arguments, check_exceptions); 2392 } 2393 2394 void MacroAssembler::call_VM(Register oop_result, 2395 Register last_java_sp, 2396 address entry_point, 2397 Register arg_1, 2398 bool check_exceptions) { 2399 pass_arg1(this, arg_1); 2400 call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions); 2401 } 2402 2403 void MacroAssembler::call_VM(Register oop_result, 2404 Register last_java_sp, 2405 address entry_point, 2406 Register arg_1, 2407 Register arg_2, 2408 bool check_exceptions) { 2409 2410 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 2411 pass_arg2(this, arg_2); 2412 pass_arg1(this, arg_1); 2413 call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions); 2414 } 2415 2416 void MacroAssembler::call_VM(Register oop_result, 2417 Register last_java_sp, 2418 address entry_point, 2419 Register arg_1, 2420 Register arg_2, 2421 Register arg_3, 2422 bool check_exceptions) { 2423 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); 2424 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); 2425 pass_arg3(this, arg_3); 2426 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 2427 pass_arg2(this, arg_2); 2428 pass_arg1(this, arg_1); 2429 call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions); 2430 } 2431 2432 void MacroAssembler::super_call_VM(Register oop_result, 2433 Register last_java_sp, 2434 address entry_point, 2435 int number_of_arguments, 2436 bool check_exceptions) { 2437 Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg); 2438 MacroAssembler::call_VM_base(oop_result, thread, last_java_sp, entry_point, number_of_arguments, check_exceptions); 2439 } 2440 2441 void MacroAssembler::super_call_VM(Register oop_result, 2442 Register last_java_sp, 2443 address entry_point, 2444 Register arg_1, 2445 bool check_exceptions) { 2446 pass_arg1(this, arg_1); 2447 super_call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions); 2448 } 2449 2450 void MacroAssembler::super_call_VM(Register oop_result, 2451 Register last_java_sp, 2452 address entry_point, 2453 Register arg_1, 2454 Register arg_2, 2455 bool check_exceptions) { 2456 2457 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 2458 pass_arg2(this, arg_2); 2459 pass_arg1(this, arg_1); 2460 super_call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions); 2461 } 2462 2463 void MacroAssembler::super_call_VM(Register oop_result, 2464 Register last_java_sp, 2465 address entry_point, 2466 Register arg_1, 2467 Register arg_2, 2468 Register arg_3, 2469 bool check_exceptions) { 2470 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); 2471 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); 2472 pass_arg3(this, arg_3); 2473 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 2474 pass_arg2(this, arg_2); 2475 pass_arg1(this, arg_1); 2476 super_call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions); 2477 } 2478 2479 void MacroAssembler::call_VM_base(Register oop_result, 2480 Register java_thread, 2481 Register last_java_sp, 2482 address entry_point, 2483 int number_of_arguments, 2484 bool check_exceptions) { 2485 // determine java_thread register 2486 if (!java_thread->is_valid()) { 2487 #ifdef _LP64 2488 java_thread = r15_thread; 2489 #else 2490 java_thread = rdi; 2491 get_thread(java_thread); 2492 #endif // LP64 2493 } 2494 // determine last_java_sp register 2495 if (!last_java_sp->is_valid()) { 2496 last_java_sp = rsp; 2497 } 2498 // debugging support 2499 assert(number_of_arguments >= 0 , "cannot have negative number of arguments"); 2500 LP64_ONLY(assert(java_thread == r15_thread, "unexpected register")); 2501 #ifdef ASSERT 2502 // TraceBytecodes does not use r12 but saves it over the call, so don't verify 2503 // r12 is the heapbase. 2504 LP64_ONLY(if ((UseCompressedOops || UseCompressedClassPointers) && !TraceBytecodes) verify_heapbase("call_VM_base: heap base corrupted?");) 2505 #endif // ASSERT 2506 2507 assert(java_thread != oop_result , "cannot use the same register for java_thread & oop_result"); 2508 assert(java_thread != last_java_sp, "cannot use the same register for java_thread & last_java_sp"); 2509 2510 // push java thread (becomes first argument of C function) 2511 2512 NOT_LP64(push(java_thread); number_of_arguments++); 2513 LP64_ONLY(mov(c_rarg0, r15_thread)); 2514 2515 // set last Java frame before call 2516 assert(last_java_sp != rbp, "can't use ebp/rbp"); 2517 2518 // Only interpreter should have to set fp 2519 set_last_Java_frame(java_thread, last_java_sp, rbp, NULL); 2520 2521 // do the call, remove parameters 2522 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments); 2523 2524 // restore the thread (cannot use the pushed argument since arguments 2525 // may be overwritten by C code generated by an optimizing compiler); 2526 // however can use the register value directly if it is callee saved. 2527 if (LP64_ONLY(true ||) java_thread == rdi || java_thread == rsi) { 2528 // rdi & rsi (also r15) are callee saved -> nothing to do 2529 #ifdef ASSERT 2530 guarantee(java_thread != rax, "change this code"); 2531 push(rax); 2532 { Label L; 2533 get_thread(rax); 2534 cmpptr(java_thread, rax); 2535 jcc(Assembler::equal, L); 2536 STOP("MacroAssembler::call_VM_base: rdi not callee saved?"); 2537 bind(L); 2538 } 2539 pop(rax); 2540 #endif 2541 } else { 2542 get_thread(java_thread); 2543 } 2544 // reset last Java frame 2545 // Only interpreter should have to clear fp 2546 reset_last_Java_frame(java_thread, true); 2547 2548 // C++ interp handles this in the interpreter 2549 check_and_handle_popframe(java_thread); 2550 check_and_handle_earlyret(java_thread); 2551 2552 if (check_exceptions) { 2553 // check for pending exceptions (java_thread is set upon return) 2554 cmpptr(Address(java_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD); 2555 #ifndef _LP64 2556 jump_cc(Assembler::notEqual, 2557 RuntimeAddress(StubRoutines::forward_exception_entry())); 2558 #else 2559 // This used to conditionally jump to forward_exception however it is 2560 // possible if we relocate that the branch will not reach. So we must jump 2561 // around so we can always reach 2562 2563 Label ok; 2564 jcc(Assembler::equal, ok); 2565 jump(RuntimeAddress(StubRoutines::forward_exception_entry())); 2566 bind(ok); 2567 #endif // LP64 2568 } 2569 2570 // get oop result if there is one and reset the value in the thread 2571 if (oop_result->is_valid()) { 2572 get_vm_result(oop_result, java_thread); 2573 } 2574 } 2575 2576 void MacroAssembler::call_VM_helper(Register oop_result, address entry_point, int number_of_arguments, bool check_exceptions) { 2577 2578 // Calculate the value for last_Java_sp 2579 // somewhat subtle. call_VM does an intermediate call 2580 // which places a return address on the stack just under the 2581 // stack pointer as the user finsihed with it. This allows 2582 // use to retrieve last_Java_pc from last_Java_sp[-1]. 2583 // On 32bit we then have to push additional args on the stack to accomplish 2584 // the actual requested call. On 64bit call_VM only can use register args 2585 // so the only extra space is the return address that call_VM created. 2586 // This hopefully explains the calculations here. 2587 2588 #ifdef _LP64 2589 // We've pushed one address, correct last_Java_sp 2590 lea(rax, Address(rsp, wordSize)); 2591 #else 2592 lea(rax, Address(rsp, (1 + number_of_arguments) * wordSize)); 2593 #endif // LP64 2594 2595 call_VM_base(oop_result, noreg, rax, entry_point, number_of_arguments, check_exceptions); 2596 2597 } 2598 2599 // Use this method when MacroAssembler version of call_VM_leaf_base() should be called from Interpreter. 2600 void MacroAssembler::call_VM_leaf0(address entry_point) { 2601 MacroAssembler::call_VM_leaf_base(entry_point, 0); 2602 } 2603 2604 void MacroAssembler::call_VM_leaf(address entry_point, int number_of_arguments) { 2605 call_VM_leaf_base(entry_point, number_of_arguments); 2606 } 2607 2608 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0) { 2609 pass_arg0(this, arg_0); 2610 call_VM_leaf(entry_point, 1); 2611 } 2612 2613 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1) { 2614 2615 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); 2616 pass_arg1(this, arg_1); 2617 pass_arg0(this, arg_0); 2618 call_VM_leaf(entry_point, 2); 2619 } 2620 2621 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) { 2622 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg")); 2623 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 2624 pass_arg2(this, arg_2); 2625 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); 2626 pass_arg1(this, arg_1); 2627 pass_arg0(this, arg_0); 2628 call_VM_leaf(entry_point, 3); 2629 } 2630 2631 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0) { 2632 pass_arg0(this, arg_0); 2633 MacroAssembler::call_VM_leaf_base(entry_point, 1); 2634 } 2635 2636 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1) { 2637 2638 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); 2639 pass_arg1(this, arg_1); 2640 pass_arg0(this, arg_0); 2641 MacroAssembler::call_VM_leaf_base(entry_point, 2); 2642 } 2643 2644 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) { 2645 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg")); 2646 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 2647 pass_arg2(this, arg_2); 2648 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); 2649 pass_arg1(this, arg_1); 2650 pass_arg0(this, arg_0); 2651 MacroAssembler::call_VM_leaf_base(entry_point, 3); 2652 } 2653 2654 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2, Register arg_3) { 2655 LP64_ONLY(assert(arg_0 != c_rarg3, "smashed arg")); 2656 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); 2657 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); 2658 pass_arg3(this, arg_3); 2659 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg")); 2660 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 2661 pass_arg2(this, arg_2); 2662 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); 2663 pass_arg1(this, arg_1); 2664 pass_arg0(this, arg_0); 2665 MacroAssembler::call_VM_leaf_base(entry_point, 4); 2666 } 2667 2668 void MacroAssembler::get_vm_result(Register oop_result, Register java_thread) { 2669 movptr(oop_result, Address(java_thread, JavaThread::vm_result_offset())); 2670 movptr(Address(java_thread, JavaThread::vm_result_offset()), NULL_WORD); 2671 verify_oop(oop_result, "broken oop in call_VM_base"); 2672 } 2673 2674 void MacroAssembler::get_vm_result_2(Register metadata_result, Register java_thread) { 2675 movptr(metadata_result, Address(java_thread, JavaThread::vm_result_2_offset())); 2676 movptr(Address(java_thread, JavaThread::vm_result_2_offset()), NULL_WORD); 2677 } 2678 2679 void MacroAssembler::check_and_handle_earlyret(Register java_thread) { 2680 } 2681 2682 void MacroAssembler::check_and_handle_popframe(Register java_thread) { 2683 } 2684 2685 void MacroAssembler::cmp32(AddressLiteral src1, int32_t imm) { 2686 if (reachable(src1)) { 2687 cmpl(as_Address(src1), imm); 2688 } else { 2689 lea(rscratch1, src1); 2690 cmpl(Address(rscratch1, 0), imm); 2691 } 2692 } 2693 2694 void MacroAssembler::cmp32(Register src1, AddressLiteral src2) { 2695 assert(!src2.is_lval(), "use cmpptr"); 2696 if (reachable(src2)) { 2697 cmpl(src1, as_Address(src2)); 2698 } else { 2699 lea(rscratch1, src2); 2700 cmpl(src1, Address(rscratch1, 0)); 2701 } 2702 } 2703 2704 void MacroAssembler::cmp32(Register src1, int32_t imm) { 2705 Assembler::cmpl(src1, imm); 2706 } 2707 2708 void MacroAssembler::cmp32(Register src1, Address src2) { 2709 Assembler::cmpl(src1, src2); 2710 } 2711 2712 void MacroAssembler::cmpsd2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) { 2713 ucomisd(opr1, opr2); 2714 2715 Label L; 2716 if (unordered_is_less) { 2717 movl(dst, -1); 2718 jcc(Assembler::parity, L); 2719 jcc(Assembler::below , L); 2720 movl(dst, 0); 2721 jcc(Assembler::equal , L); 2722 increment(dst); 2723 } else { // unordered is greater 2724 movl(dst, 1); 2725 jcc(Assembler::parity, L); 2726 jcc(Assembler::above , L); 2727 movl(dst, 0); 2728 jcc(Assembler::equal , L); 2729 decrementl(dst); 2730 } 2731 bind(L); 2732 } 2733 2734 void MacroAssembler::cmpss2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) { 2735 ucomiss(opr1, opr2); 2736 2737 Label L; 2738 if (unordered_is_less) { 2739 movl(dst, -1); 2740 jcc(Assembler::parity, L); 2741 jcc(Assembler::below , L); 2742 movl(dst, 0); 2743 jcc(Assembler::equal , L); 2744 increment(dst); 2745 } else { // unordered is greater 2746 movl(dst, 1); 2747 jcc(Assembler::parity, L); 2748 jcc(Assembler::above , L); 2749 movl(dst, 0); 2750 jcc(Assembler::equal , L); 2751 decrementl(dst); 2752 } 2753 bind(L); 2754 } 2755 2756 2757 void MacroAssembler::cmp8(AddressLiteral src1, int imm) { 2758 if (reachable(src1)) { 2759 cmpb(as_Address(src1), imm); 2760 } else { 2761 lea(rscratch1, src1); 2762 cmpb(Address(rscratch1, 0), imm); 2763 } 2764 } 2765 2766 void MacroAssembler::cmpptr(Register src1, AddressLiteral src2) { 2767 #ifdef _LP64 2768 if (src2.is_lval()) { 2769 movptr(rscratch1, src2); 2770 Assembler::cmpq(src1, rscratch1); 2771 } else if (reachable(src2)) { 2772 cmpq(src1, as_Address(src2)); 2773 } else { 2774 lea(rscratch1, src2); 2775 Assembler::cmpq(src1, Address(rscratch1, 0)); 2776 } 2777 #else 2778 if (src2.is_lval()) { 2779 cmp_literal32(src1, (int32_t) src2.target(), src2.rspec()); 2780 } else { 2781 cmpl(src1, as_Address(src2)); 2782 } 2783 #endif // _LP64 2784 } 2785 2786 void MacroAssembler::cmpptr(Address src1, AddressLiteral src2) { 2787 assert(src2.is_lval(), "not a mem-mem compare"); 2788 #ifdef _LP64 2789 // moves src2's literal address 2790 movptr(rscratch1, src2); 2791 Assembler::cmpq(src1, rscratch1); 2792 #else 2793 cmp_literal32(src1, (int32_t) src2.target(), src2.rspec()); 2794 #endif // _LP64 2795 } 2796 2797 void MacroAssembler::cmpoop(Register src1, Register src2) { 2798 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler(); 2799 bs->obj_equals(this, src1, src2); 2800 } 2801 2802 void MacroAssembler::cmpoop(Register src1, Address src2) { 2803 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler(); 2804 bs->obj_equals(this, src1, src2); 2805 } 2806 2807 #ifdef _LP64 2808 void MacroAssembler::cmpoop(Register src1, jobject src2) { 2809 movoop(rscratch1, src2); 2810 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler(); 2811 bs->obj_equals(this, src1, rscratch1); 2812 } 2813 #endif 2814 2815 void MacroAssembler::locked_cmpxchgptr(Register reg, AddressLiteral adr) { 2816 if (reachable(adr)) { 2817 if (os::is_MP()) 2818 lock(); 2819 cmpxchgptr(reg, as_Address(adr)); 2820 } else { 2821 lea(rscratch1, adr); 2822 if (os::is_MP()) 2823 lock(); 2824 cmpxchgptr(reg, Address(rscratch1, 0)); 2825 } 2826 } 2827 2828 void MacroAssembler::cmpxchgptr(Register reg, Address adr) { 2829 LP64_ONLY(cmpxchgq(reg, adr)) NOT_LP64(cmpxchgl(reg, adr)); 2830 } 2831 2832 void MacroAssembler::comisd(XMMRegister dst, AddressLiteral src) { 2833 if (reachable(src)) { 2834 Assembler::comisd(dst, as_Address(src)); 2835 } else { 2836 lea(rscratch1, src); 2837 Assembler::comisd(dst, Address(rscratch1, 0)); 2838 } 2839 } 2840 2841 void MacroAssembler::comiss(XMMRegister dst, AddressLiteral src) { 2842 if (reachable(src)) { 2843 Assembler::comiss(dst, as_Address(src)); 2844 } else { 2845 lea(rscratch1, src); 2846 Assembler::comiss(dst, Address(rscratch1, 0)); 2847 } 2848 } 2849 2850 2851 void MacroAssembler::cond_inc32(Condition cond, AddressLiteral counter_addr) { 2852 Condition negated_cond = negate_condition(cond); 2853 Label L; 2854 jcc(negated_cond, L); 2855 pushf(); // Preserve flags 2856 atomic_incl(counter_addr); 2857 popf(); 2858 bind(L); 2859 } 2860 2861 int MacroAssembler::corrected_idivl(Register reg) { 2862 // Full implementation of Java idiv and irem; checks for 2863 // special case as described in JVM spec., p.243 & p.271. 2864 // The function returns the (pc) offset of the idivl 2865 // instruction - may be needed for implicit exceptions. 2866 // 2867 // normal case special case 2868 // 2869 // input : rax,: dividend min_int 2870 // reg: divisor (may not be rax,/rdx) -1 2871 // 2872 // output: rax,: quotient (= rax, idiv reg) min_int 2873 // rdx: remainder (= rax, irem reg) 0 2874 assert(reg != rax && reg != rdx, "reg cannot be rax, or rdx register"); 2875 const int min_int = 0x80000000; 2876 Label normal_case, special_case; 2877 2878 // check for special case 2879 cmpl(rax, min_int); 2880 jcc(Assembler::notEqual, normal_case); 2881 xorl(rdx, rdx); // prepare rdx for possible special case (where remainder = 0) 2882 cmpl(reg, -1); 2883 jcc(Assembler::equal, special_case); 2884 2885 // handle normal case 2886 bind(normal_case); 2887 cdql(); 2888 int idivl_offset = offset(); 2889 idivl(reg); 2890 2891 // normal and special case exit 2892 bind(special_case); 2893 2894 return idivl_offset; 2895 } 2896 2897 2898 2899 void MacroAssembler::decrementl(Register reg, int value) { 2900 if (value == min_jint) {subl(reg, value) ; return; } 2901 if (value < 0) { incrementl(reg, -value); return; } 2902 if (value == 0) { ; return; } 2903 if (value == 1 && UseIncDec) { decl(reg) ; return; } 2904 /* else */ { subl(reg, value) ; return; } 2905 } 2906 2907 void MacroAssembler::decrementl(Address dst, int value) { 2908 if (value == min_jint) {subl(dst, value) ; return; } 2909 if (value < 0) { incrementl(dst, -value); return; } 2910 if (value == 0) { ; return; } 2911 if (value == 1 && UseIncDec) { decl(dst) ; return; } 2912 /* else */ { subl(dst, value) ; return; } 2913 } 2914 2915 void MacroAssembler::division_with_shift (Register reg, int shift_value) { 2916 assert (shift_value > 0, "illegal shift value"); 2917 Label _is_positive; 2918 testl (reg, reg); 2919 jcc (Assembler::positive, _is_positive); 2920 int offset = (1 << shift_value) - 1 ; 2921 2922 if (offset == 1) { 2923 incrementl(reg); 2924 } else { 2925 addl(reg, offset); 2926 } 2927 2928 bind (_is_positive); 2929 sarl(reg, shift_value); 2930 } 2931 2932 void MacroAssembler::divsd(XMMRegister dst, AddressLiteral src) { 2933 if (reachable(src)) { 2934 Assembler::divsd(dst, as_Address(src)); 2935 } else { 2936 lea(rscratch1, src); 2937 Assembler::divsd(dst, Address(rscratch1, 0)); 2938 } 2939 } 2940 2941 void MacroAssembler::divss(XMMRegister dst, AddressLiteral src) { 2942 if (reachable(src)) { 2943 Assembler::divss(dst, as_Address(src)); 2944 } else { 2945 lea(rscratch1, src); 2946 Assembler::divss(dst, Address(rscratch1, 0)); 2947 } 2948 } 2949 2950 // !defined(COMPILER2) is because of stupid core builds 2951 #if !defined(_LP64) || defined(COMPILER1) || !defined(COMPILER2) || INCLUDE_JVMCI 2952 void MacroAssembler::empty_FPU_stack() { 2953 if (VM_Version::supports_mmx()) { 2954 emms(); 2955 } else { 2956 for (int i = 8; i-- > 0; ) ffree(i); 2957 } 2958 } 2959 #endif // !LP64 || C1 || !C2 || INCLUDE_JVMCI 2960 2961 2962 void MacroAssembler::enter() { 2963 push(rbp); 2964 mov(rbp, rsp); 2965 } 2966 2967 // A 5 byte nop that is safe for patching (see patch_verified_entry) 2968 void MacroAssembler::fat_nop() { 2969 if (UseAddressNop) { 2970 addr_nop_5(); 2971 } else { 2972 emit_int8(0x26); // es: 2973 emit_int8(0x2e); // cs: 2974 emit_int8(0x64); // fs: 2975 emit_int8(0x65); // gs: 2976 emit_int8((unsigned char)0x90); 2977 } 2978 } 2979 2980 void MacroAssembler::fcmp(Register tmp) { 2981 fcmp(tmp, 1, true, true); 2982 } 2983 2984 void MacroAssembler::fcmp(Register tmp, int index, bool pop_left, bool pop_right) { 2985 assert(!pop_right || pop_left, "usage error"); 2986 if (VM_Version::supports_cmov()) { 2987 assert(tmp == noreg, "unneeded temp"); 2988 if (pop_left) { 2989 fucomip(index); 2990 } else { 2991 fucomi(index); 2992 } 2993 if (pop_right) { 2994 fpop(); 2995 } 2996 } else { 2997 assert(tmp != noreg, "need temp"); 2998 if (pop_left) { 2999 if (pop_right) { 3000 fcompp(); 3001 } else { 3002 fcomp(index); 3003 } 3004 } else { 3005 fcom(index); 3006 } 3007 // convert FPU condition into eflags condition via rax, 3008 save_rax(tmp); 3009 fwait(); fnstsw_ax(); 3010 sahf(); 3011 restore_rax(tmp); 3012 } 3013 // condition codes set as follows: 3014 // 3015 // CF (corresponds to C0) if x < y 3016 // PF (corresponds to C2) if unordered 3017 // ZF (corresponds to C3) if x = y 3018 } 3019 3020 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less) { 3021 fcmp2int(dst, unordered_is_less, 1, true, true); 3022 } 3023 3024 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less, int index, bool pop_left, bool pop_right) { 3025 fcmp(VM_Version::supports_cmov() ? noreg : dst, index, pop_left, pop_right); 3026 Label L; 3027 if (unordered_is_less) { 3028 movl(dst, -1); 3029 jcc(Assembler::parity, L); 3030 jcc(Assembler::below , L); 3031 movl(dst, 0); 3032 jcc(Assembler::equal , L); 3033 increment(dst); 3034 } else { // unordered is greater 3035 movl(dst, 1); 3036 jcc(Assembler::parity, L); 3037 jcc(Assembler::above , L); 3038 movl(dst, 0); 3039 jcc(Assembler::equal , L); 3040 decrementl(dst); 3041 } 3042 bind(L); 3043 } 3044 3045 void MacroAssembler::fld_d(AddressLiteral src) { 3046 fld_d(as_Address(src)); 3047 } 3048 3049 void MacroAssembler::fld_s(AddressLiteral src) { 3050 fld_s(as_Address(src)); 3051 } 3052 3053 void MacroAssembler::fld_x(AddressLiteral src) { 3054 Assembler::fld_x(as_Address(src)); 3055 } 3056 3057 void MacroAssembler::fldcw(AddressLiteral src) { 3058 Assembler::fldcw(as_Address(src)); 3059 } 3060 3061 void MacroAssembler::mulpd(XMMRegister dst, AddressLiteral src) { 3062 if (reachable(src)) { 3063 Assembler::mulpd(dst, as_Address(src)); 3064 } else { 3065 lea(rscratch1, src); 3066 Assembler::mulpd(dst, Address(rscratch1, 0)); 3067 } 3068 } 3069 3070 void MacroAssembler::increase_precision() { 3071 subptr(rsp, BytesPerWord); 3072 fnstcw(Address(rsp, 0)); 3073 movl(rax, Address(rsp, 0)); 3074 orl(rax, 0x300); 3075 push(rax); 3076 fldcw(Address(rsp, 0)); 3077 pop(rax); 3078 } 3079 3080 void MacroAssembler::restore_precision() { 3081 fldcw(Address(rsp, 0)); 3082 addptr(rsp, BytesPerWord); 3083 } 3084 3085 void MacroAssembler::fpop() { 3086 ffree(); 3087 fincstp(); 3088 } 3089 3090 void MacroAssembler::load_float(Address src) { 3091 if (UseSSE >= 1) { 3092 movflt(xmm0, src); 3093 } else { 3094 LP64_ONLY(ShouldNotReachHere()); 3095 NOT_LP64(fld_s(src)); 3096 } 3097 } 3098 3099 void MacroAssembler::store_float(Address dst) { 3100 if (UseSSE >= 1) { 3101 movflt(dst, xmm0); 3102 } else { 3103 LP64_ONLY(ShouldNotReachHere()); 3104 NOT_LP64(fstp_s(dst)); 3105 } 3106 } 3107 3108 void MacroAssembler::load_double(Address src) { 3109 if (UseSSE >= 2) { 3110 movdbl(xmm0, src); 3111 } else { 3112 LP64_ONLY(ShouldNotReachHere()); 3113 NOT_LP64(fld_d(src)); 3114 } 3115 } 3116 3117 void MacroAssembler::store_double(Address dst) { 3118 if (UseSSE >= 2) { 3119 movdbl(dst, xmm0); 3120 } else { 3121 LP64_ONLY(ShouldNotReachHere()); 3122 NOT_LP64(fstp_d(dst)); 3123 } 3124 } 3125 3126 void MacroAssembler::fremr(Register tmp) { 3127 save_rax(tmp); 3128 { Label L; 3129 bind(L); 3130 fprem(); 3131 fwait(); fnstsw_ax(); 3132 #ifdef _LP64 3133 testl(rax, 0x400); 3134 jcc(Assembler::notEqual, L); 3135 #else 3136 sahf(); 3137 jcc(Assembler::parity, L); 3138 #endif // _LP64 3139 } 3140 restore_rax(tmp); 3141 // Result is in ST0. 3142 // Note: fxch & fpop to get rid of ST1 3143 // (otherwise FPU stack could overflow eventually) 3144 fxch(1); 3145 fpop(); 3146 } 3147 3148 // dst = c = a * b + c 3149 void MacroAssembler::fmad(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c) { 3150 Assembler::vfmadd231sd(c, a, b); 3151 if (dst != c) { 3152 movdbl(dst, c); 3153 } 3154 } 3155 3156 // dst = c = a * b + c 3157 void MacroAssembler::fmaf(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c) { 3158 Assembler::vfmadd231ss(c, a, b); 3159 if (dst != c) { 3160 movflt(dst, c); 3161 } 3162 } 3163 3164 // dst = c = a * b + c 3165 void MacroAssembler::vfmad(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c, int vector_len) { 3166 Assembler::vfmadd231pd(c, a, b, vector_len); 3167 if (dst != c) { 3168 vmovdqu(dst, c); 3169 } 3170 } 3171 3172 // dst = c = a * b + c 3173 void MacroAssembler::vfmaf(XMMRegister dst, XMMRegister a, XMMRegister b, XMMRegister c, int vector_len) { 3174 Assembler::vfmadd231ps(c, a, b, vector_len); 3175 if (dst != c) { 3176 vmovdqu(dst, c); 3177 } 3178 } 3179 3180 // dst = c = a * b + c 3181 void MacroAssembler::vfmad(XMMRegister dst, XMMRegister a, Address b, XMMRegister c, int vector_len) { 3182 Assembler::vfmadd231pd(c, a, b, vector_len); 3183 if (dst != c) { 3184 vmovdqu(dst, c); 3185 } 3186 } 3187 3188 // dst = c = a * b + c 3189 void MacroAssembler::vfmaf(XMMRegister dst, XMMRegister a, Address b, XMMRegister c, int vector_len) { 3190 Assembler::vfmadd231ps(c, a, b, vector_len); 3191 if (dst != c) { 3192 vmovdqu(dst, c); 3193 } 3194 } 3195 3196 void MacroAssembler::incrementl(AddressLiteral dst) { 3197 if (reachable(dst)) { 3198 incrementl(as_Address(dst)); 3199 } else { 3200 lea(rscratch1, dst); 3201 incrementl(Address(rscratch1, 0)); 3202 } 3203 } 3204 3205 void MacroAssembler::incrementl(ArrayAddress dst) { 3206 incrementl(as_Address(dst)); 3207 } 3208 3209 void MacroAssembler::incrementl(Register reg, int value) { 3210 if (value == min_jint) {addl(reg, value) ; return; } 3211 if (value < 0) { decrementl(reg, -value); return; } 3212 if (value == 0) { ; return; } 3213 if (value == 1 && UseIncDec) { incl(reg) ; return; } 3214 /* else */ { addl(reg, value) ; return; } 3215 } 3216 3217 void MacroAssembler::incrementl(Address dst, int value) { 3218 if (value == min_jint) {addl(dst, value) ; return; } 3219 if (value < 0) { decrementl(dst, -value); return; } 3220 if (value == 0) { ; return; } 3221 if (value == 1 && UseIncDec) { incl(dst) ; return; } 3222 /* else */ { addl(dst, value) ; return; } 3223 } 3224 3225 void MacroAssembler::jump(AddressLiteral dst) { 3226 if (reachable(dst)) { 3227 jmp_literal(dst.target(), dst.rspec()); 3228 } else { 3229 lea(rscratch1, dst); 3230 jmp(rscratch1); 3231 } 3232 } 3233 3234 void MacroAssembler::jump_cc(Condition cc, AddressLiteral dst) { 3235 if (reachable(dst)) { 3236 InstructionMark im(this); 3237 relocate(dst.reloc()); 3238 const int short_size = 2; 3239 const int long_size = 6; 3240 int offs = (intptr_t)dst.target() - ((intptr_t)pc()); 3241 if (dst.reloc() == relocInfo::none && is8bit(offs - short_size)) { 3242 // 0111 tttn #8-bit disp 3243 emit_int8(0x70 | cc); 3244 emit_int8((offs - short_size) & 0xFF); 3245 } else { 3246 // 0000 1111 1000 tttn #32-bit disp 3247 emit_int8(0x0F); 3248 emit_int8((unsigned char)(0x80 | cc)); 3249 emit_int32(offs - long_size); 3250 } 3251 } else { 3252 #ifdef ASSERT 3253 warning("reversing conditional branch"); 3254 #endif /* ASSERT */ 3255 Label skip; 3256 jccb(reverse[cc], skip); 3257 lea(rscratch1, dst); 3258 Assembler::jmp(rscratch1); 3259 bind(skip); 3260 } 3261 } 3262 3263 void MacroAssembler::ldmxcsr(AddressLiteral src) { 3264 if (reachable(src)) { 3265 Assembler::ldmxcsr(as_Address(src)); 3266 } else { 3267 lea(rscratch1, src); 3268 Assembler::ldmxcsr(Address(rscratch1, 0)); 3269 } 3270 } 3271 3272 int MacroAssembler::load_signed_byte(Register dst, Address src) { 3273 int off; 3274 if (LP64_ONLY(true ||) VM_Version::is_P6()) { 3275 off = offset(); 3276 movsbl(dst, src); // movsxb 3277 } else { 3278 off = load_unsigned_byte(dst, src); 3279 shll(dst, 24); 3280 sarl(dst, 24); 3281 } 3282 return off; 3283 } 3284 3285 // Note: load_signed_short used to be called load_signed_word. 3286 // Although the 'w' in x86 opcodes refers to the term "word" in the assembler 3287 // manual, which means 16 bits, that usage is found nowhere in HotSpot code. 3288 // The term "word" in HotSpot means a 32- or 64-bit machine word. 3289 int MacroAssembler::load_signed_short(Register dst, Address src) { 3290 int off; 3291 if (LP64_ONLY(true ||) VM_Version::is_P6()) { 3292 // This is dubious to me since it seems safe to do a signed 16 => 64 bit 3293 // version but this is what 64bit has always done. This seems to imply 3294 // that users are only using 32bits worth. 3295 off = offset(); 3296 movswl(dst, src); // movsxw 3297 } else { 3298 off = load_unsigned_short(dst, src); 3299 shll(dst, 16); 3300 sarl(dst, 16); 3301 } 3302 return off; 3303 } 3304 3305 int MacroAssembler::load_unsigned_byte(Register dst, Address src) { 3306 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16, 3307 // and "3.9 Partial Register Penalties", p. 22). 3308 int off; 3309 if (LP64_ONLY(true || ) VM_Version::is_P6() || src.uses(dst)) { 3310 off = offset(); 3311 movzbl(dst, src); // movzxb 3312 } else { 3313 xorl(dst, dst); 3314 off = offset(); 3315 movb(dst, src); 3316 } 3317 return off; 3318 } 3319 3320 // Note: load_unsigned_short used to be called load_unsigned_word. 3321 int MacroAssembler::load_unsigned_short(Register dst, Address src) { 3322 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16, 3323 // and "3.9 Partial Register Penalties", p. 22). 3324 int off; 3325 if (LP64_ONLY(true ||) VM_Version::is_P6() || src.uses(dst)) { 3326 off = offset(); 3327 movzwl(dst, src); // movzxw 3328 } else { 3329 xorl(dst, dst); 3330 off = offset(); 3331 movw(dst, src); 3332 } 3333 return off; 3334 } 3335 3336 void MacroAssembler::load_sized_value(Register dst, Address src, size_t size_in_bytes, bool is_signed, Register dst2) { 3337 switch (size_in_bytes) { 3338 #ifndef _LP64 3339 case 8: 3340 assert(dst2 != noreg, "second dest register required"); 3341 movl(dst, src); 3342 movl(dst2, src.plus_disp(BytesPerInt)); 3343 break; 3344 #else 3345 case 8: movq(dst, src); break; 3346 #endif 3347 case 4: movl(dst, src); break; 3348 case 2: is_signed ? load_signed_short(dst, src) : load_unsigned_short(dst, src); break; 3349 case 1: is_signed ? load_signed_byte( dst, src) : load_unsigned_byte( dst, src); break; 3350 default: ShouldNotReachHere(); 3351 } 3352 } 3353 3354 void MacroAssembler::store_sized_value(Address dst, Register src, size_t size_in_bytes, Register src2) { 3355 switch (size_in_bytes) { 3356 #ifndef _LP64 3357 case 8: 3358 assert(src2 != noreg, "second source register required"); 3359 movl(dst, src); 3360 movl(dst.plus_disp(BytesPerInt), src2); 3361 break; 3362 #else 3363 case 8: movq(dst, src); break; 3364 #endif 3365 case 4: movl(dst, src); break; 3366 case 2: movw(dst, src); break; 3367 case 1: movb(dst, src); break; 3368 default: ShouldNotReachHere(); 3369 } 3370 } 3371 3372 void MacroAssembler::mov32(AddressLiteral dst, Register src) { 3373 if (reachable(dst)) { 3374 movl(as_Address(dst), src); 3375 } else { 3376 lea(rscratch1, dst); 3377 movl(Address(rscratch1, 0), src); 3378 } 3379 } 3380 3381 void MacroAssembler::mov32(Register dst, AddressLiteral src) { 3382 if (reachable(src)) { 3383 movl(dst, as_Address(src)); 3384 } else { 3385 lea(rscratch1, src); 3386 movl(dst, Address(rscratch1, 0)); 3387 } 3388 } 3389 3390 // C++ bool manipulation 3391 3392 void MacroAssembler::movbool(Register dst, Address src) { 3393 if(sizeof(bool) == 1) 3394 movb(dst, src); 3395 else if(sizeof(bool) == 2) 3396 movw(dst, src); 3397 else if(sizeof(bool) == 4) 3398 movl(dst, src); 3399 else 3400 // unsupported 3401 ShouldNotReachHere(); 3402 } 3403 3404 void MacroAssembler::movbool(Address dst, bool boolconst) { 3405 if(sizeof(bool) == 1) 3406 movb(dst, (int) boolconst); 3407 else if(sizeof(bool) == 2) 3408 movw(dst, (int) boolconst); 3409 else if(sizeof(bool) == 4) 3410 movl(dst, (int) boolconst); 3411 else 3412 // unsupported 3413 ShouldNotReachHere(); 3414 } 3415 3416 void MacroAssembler::movbool(Address dst, Register src) { 3417 if(sizeof(bool) == 1) 3418 movb(dst, src); 3419 else if(sizeof(bool) == 2) 3420 movw(dst, src); 3421 else if(sizeof(bool) == 4) 3422 movl(dst, src); 3423 else 3424 // unsupported 3425 ShouldNotReachHere(); 3426 } 3427 3428 void MacroAssembler::movbyte(ArrayAddress dst, int src) { 3429 movb(as_Address(dst), src); 3430 } 3431 3432 void MacroAssembler::movdl(XMMRegister dst, AddressLiteral src) { 3433 if (reachable(src)) { 3434 movdl(dst, as_Address(src)); 3435 } else { 3436 lea(rscratch1, src); 3437 movdl(dst, Address(rscratch1, 0)); 3438 } 3439 } 3440 3441 void MacroAssembler::movq(XMMRegister dst, AddressLiteral src) { 3442 if (reachable(src)) { 3443 movq(dst, as_Address(src)); 3444 } else { 3445 lea(rscratch1, src); 3446 movq(dst, Address(rscratch1, 0)); 3447 } 3448 } 3449 3450 void MacroAssembler::setvectmask(Register dst, Register src) { 3451 Assembler::movl(dst, 1); 3452 Assembler::shlxl(dst, dst, src); 3453 Assembler::decl(dst); 3454 Assembler::kmovdl(k1, dst); 3455 Assembler::movl(dst, src); 3456 } 3457 3458 void MacroAssembler::restorevectmask() { 3459 Assembler::knotwl(k1, k0); 3460 } 3461 3462 void MacroAssembler::movdbl(XMMRegister dst, AddressLiteral src) { 3463 if (reachable(src)) { 3464 if (UseXmmLoadAndClearUpper) { 3465 movsd (dst, as_Address(src)); 3466 } else { 3467 movlpd(dst, as_Address(src)); 3468 } 3469 } else { 3470 lea(rscratch1, src); 3471 if (UseXmmLoadAndClearUpper) { 3472 movsd (dst, Address(rscratch1, 0)); 3473 } else { 3474 movlpd(dst, Address(rscratch1, 0)); 3475 } 3476 } 3477 } 3478 3479 void MacroAssembler::movflt(XMMRegister dst, AddressLiteral src) { 3480 if (reachable(src)) { 3481 movss(dst, as_Address(src)); 3482 } else { 3483 lea(rscratch1, src); 3484 movss(dst, Address(rscratch1, 0)); 3485 } 3486 } 3487 3488 void MacroAssembler::movptr(Register dst, Register src) { 3489 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src)); 3490 } 3491 3492 void MacroAssembler::movptr(Register dst, Address src) { 3493 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src)); 3494 } 3495 3496 // src should NEVER be a real pointer. Use AddressLiteral for true pointers 3497 void MacroAssembler::movptr(Register dst, intptr_t src) { 3498 LP64_ONLY(mov64(dst, src)) NOT_LP64(movl(dst, src)); 3499 } 3500 3501 void MacroAssembler::movptr(Address dst, Register src) { 3502 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src)); 3503 } 3504 3505 void MacroAssembler::movdqu(Address dst, XMMRegister src) { 3506 if (UseAVX > 2 && !VM_Version::supports_avx512vl() && (src->encoding() > 15)) { 3507 Assembler::vextractf32x4(dst, src, 0); 3508 } else { 3509 Assembler::movdqu(dst, src); 3510 } 3511 } 3512 3513 void MacroAssembler::movdqu(XMMRegister dst, Address src) { 3514 if (UseAVX > 2 && !VM_Version::supports_avx512vl() && (dst->encoding() > 15)) { 3515 Assembler::vinsertf32x4(dst, dst, src, 0); 3516 } else { 3517 Assembler::movdqu(dst, src); 3518 } 3519 } 3520 3521 void MacroAssembler::movdqu(XMMRegister dst, XMMRegister src) { 3522 if (UseAVX > 2 && !VM_Version::supports_avx512vl()) { 3523 Assembler::evmovdqul(dst, src, Assembler::AVX_512bit); 3524 } else { 3525 Assembler::movdqu(dst, src); 3526 } 3527 } 3528 3529 void MacroAssembler::movdqu(XMMRegister dst, AddressLiteral src, Register scratchReg) { 3530 if (reachable(src)) { 3531 movdqu(dst, as_Address(src)); 3532 } else { 3533 lea(scratchReg, src); 3534 movdqu(dst, Address(scratchReg, 0)); 3535 } 3536 } 3537 3538 void MacroAssembler::vmovdqu(Address dst, XMMRegister src) { 3539 if (UseAVX > 2 && !VM_Version::supports_avx512vl() && (src->encoding() > 15)) { 3540 vextractf64x4_low(dst, src); 3541 } else { 3542 Assembler::vmovdqu(dst, src); 3543 } 3544 } 3545 3546 void MacroAssembler::vmovdqu(XMMRegister dst, Address src) { 3547 if (UseAVX > 2 && !VM_Version::supports_avx512vl() && (dst->encoding() > 15)) { 3548 vinsertf64x4_low(dst, src); 3549 } else { 3550 Assembler::vmovdqu(dst, src); 3551 } 3552 } 3553 3554 void MacroAssembler::vmovdqu(XMMRegister dst, XMMRegister src) { 3555 if (UseAVX > 2 && !VM_Version::supports_avx512vl()) { 3556 Assembler::evmovdqul(dst, src, Assembler::AVX_512bit); 3557 } 3558 else { 3559 Assembler::vmovdqu(dst, src); 3560 } 3561 } 3562 3563 void MacroAssembler::vmovdqu(XMMRegister dst, AddressLiteral src) { 3564 if (reachable(src)) { 3565 vmovdqu(dst, as_Address(src)); 3566 } 3567 else { 3568 lea(rscratch1, src); 3569 vmovdqu(dst, Address(rscratch1, 0)); 3570 } 3571 } 3572 3573 void MacroAssembler::evmovdquq(XMMRegister dst, AddressLiteral src, int vector_len, Register rscratch) { 3574 if (reachable(src)) { 3575 Assembler::evmovdquq(dst, as_Address(src), vector_len); 3576 } else { 3577 lea(rscratch, src); 3578 Assembler::evmovdquq(dst, Address(rscratch, 0), vector_len); 3579 } 3580 } 3581 3582 void MacroAssembler::movdqa(XMMRegister dst, AddressLiteral src) { 3583 if (reachable(src)) { 3584 Assembler::movdqa(dst, as_Address(src)); 3585 } else { 3586 lea(rscratch1, src); 3587 Assembler::movdqa(dst, Address(rscratch1, 0)); 3588 } 3589 } 3590 3591 void MacroAssembler::movsd(XMMRegister dst, AddressLiteral src) { 3592 if (reachable(src)) { 3593 Assembler::movsd(dst, as_Address(src)); 3594 } else { 3595 lea(rscratch1, src); 3596 Assembler::movsd(dst, Address(rscratch1, 0)); 3597 } 3598 } 3599 3600 void MacroAssembler::movss(XMMRegister dst, AddressLiteral src) { 3601 if (reachable(src)) { 3602 Assembler::movss(dst, as_Address(src)); 3603 } else { 3604 lea(rscratch1, src); 3605 Assembler::movss(dst, Address(rscratch1, 0)); 3606 } 3607 } 3608 3609 void MacroAssembler::mulsd(XMMRegister dst, AddressLiteral src) { 3610 if (reachable(src)) { 3611 Assembler::mulsd(dst, as_Address(src)); 3612 } else { 3613 lea(rscratch1, src); 3614 Assembler::mulsd(dst, Address(rscratch1, 0)); 3615 } 3616 } 3617 3618 void MacroAssembler::mulss(XMMRegister dst, AddressLiteral src) { 3619 if (reachable(src)) { 3620 Assembler::mulss(dst, as_Address(src)); 3621 } else { 3622 lea(rscratch1, src); 3623 Assembler::mulss(dst, Address(rscratch1, 0)); 3624 } 3625 } 3626 3627 void MacroAssembler::null_check(Register reg, int offset) { 3628 if (needs_explicit_null_check(offset)) { 3629 // provoke OS NULL exception if reg = NULL by 3630 // accessing M[reg] w/o changing any (non-CC) registers 3631 // NOTE: cmpl is plenty here to provoke a segv 3632 cmpptr(rax, Address(reg, 0)); 3633 // Note: should probably use testl(rax, Address(reg, 0)); 3634 // may be shorter code (however, this version of 3635 // testl needs to be implemented first) 3636 } else { 3637 // nothing to do, (later) access of M[reg + offset] 3638 // will provoke OS NULL exception if reg = NULL 3639 } 3640 } 3641 3642 void MacroAssembler::os_breakpoint() { 3643 // instead of directly emitting a breakpoint, call os:breakpoint for better debugability 3644 // (e.g., MSVC can't call ps() otherwise) 3645 call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint))); 3646 } 3647 3648 void MacroAssembler::unimplemented(const char* what) { 3649 const char* buf = NULL; 3650 { 3651 ResourceMark rm; 3652 stringStream ss; 3653 ss.print("unimplemented: %s", what); 3654 buf = code_string(ss.as_string()); 3655 } 3656 stop(buf); 3657 } 3658 3659 #ifdef _LP64 3660 #define XSTATE_BV 0x200 3661 #endif 3662 3663 void MacroAssembler::pop_CPU_state() { 3664 pop_FPU_state(); 3665 pop_IU_state(); 3666 } 3667 3668 void MacroAssembler::pop_FPU_state() { 3669 #ifndef _LP64 3670 frstor(Address(rsp, 0)); 3671 #else 3672 fxrstor(Address(rsp, 0)); 3673 #endif 3674 addptr(rsp, FPUStateSizeInWords * wordSize); 3675 } 3676 3677 void MacroAssembler::pop_IU_state() { 3678 popa(); 3679 LP64_ONLY(addq(rsp, 8)); 3680 popf(); 3681 } 3682 3683 // Save Integer and Float state 3684 // Warning: Stack must be 16 byte aligned (64bit) 3685 void MacroAssembler::push_CPU_state() { 3686 push_IU_state(); 3687 push_FPU_state(); 3688 } 3689 3690 void MacroAssembler::push_FPU_state() { 3691 subptr(rsp, FPUStateSizeInWords * wordSize); 3692 #ifndef _LP64 3693 fnsave(Address(rsp, 0)); 3694 fwait(); 3695 #else 3696 fxsave(Address(rsp, 0)); 3697 #endif // LP64 3698 } 3699 3700 void MacroAssembler::push_IU_state() { 3701 // Push flags first because pusha kills them 3702 pushf(); 3703 // Make sure rsp stays 16-byte aligned 3704 LP64_ONLY(subq(rsp, 8)); 3705 pusha(); 3706 } 3707 3708 void MacroAssembler::reset_last_Java_frame(Register java_thread, bool clear_fp) { // determine java_thread register 3709 if (!java_thread->is_valid()) { 3710 java_thread = rdi; 3711 get_thread(java_thread); 3712 } 3713 // we must set sp to zero to clear frame 3714 movptr(Address(java_thread, JavaThread::last_Java_sp_offset()), NULL_WORD); 3715 if (clear_fp) { 3716 movptr(Address(java_thread, JavaThread::last_Java_fp_offset()), NULL_WORD); 3717 } 3718 3719 // Always clear the pc because it could have been set by make_walkable() 3720 movptr(Address(java_thread, JavaThread::last_Java_pc_offset()), NULL_WORD); 3721 3722 vzeroupper(); 3723 } 3724 3725 void MacroAssembler::restore_rax(Register tmp) { 3726 if (tmp == noreg) pop(rax); 3727 else if (tmp != rax) mov(rax, tmp); 3728 } 3729 3730 void MacroAssembler::round_to(Register reg, int modulus) { 3731 addptr(reg, modulus - 1); 3732 andptr(reg, -modulus); 3733 } 3734 3735 void MacroAssembler::save_rax(Register tmp) { 3736 if (tmp == noreg) push(rax); 3737 else if (tmp != rax) mov(tmp, rax); 3738 } 3739 3740 // Write serialization page so VM thread can do a pseudo remote membar. 3741 // We use the current thread pointer to calculate a thread specific 3742 // offset to write to within the page. This minimizes bus traffic 3743 // due to cache line collision. 3744 void MacroAssembler::serialize_memory(Register thread, Register tmp) { 3745 movl(tmp, thread); 3746 shrl(tmp, os::get_serialize_page_shift_count()); 3747 andl(tmp, (os::vm_page_size() - sizeof(int))); 3748 3749 Address index(noreg, tmp, Address::times_1); 3750 ExternalAddress page(os::get_memory_serialize_page()); 3751 3752 // Size of store must match masking code above 3753 movl(as_Address(ArrayAddress(page, index)), tmp); 3754 } 3755 3756 void MacroAssembler::safepoint_poll(Label& slow_path, Register thread_reg, Register temp_reg) { 3757 if (SafepointMechanism::uses_thread_local_poll()) { 3758 #ifdef _LP64 3759 assert(thread_reg == r15_thread, "should be"); 3760 #else 3761 if (thread_reg == noreg) { 3762 thread_reg = temp_reg; 3763 get_thread(thread_reg); 3764 } 3765 #endif 3766 testb(Address(thread_reg, Thread::polling_page_offset()), SafepointMechanism::poll_bit()); 3767 jcc(Assembler::notZero, slow_path); // handshake bit set implies poll 3768 } else { 3769 cmp32(ExternalAddress(SafepointSynchronize::address_of_state()), 3770 SafepointSynchronize::_not_synchronized); 3771 jcc(Assembler::notEqual, slow_path); 3772 } 3773 } 3774 3775 // Calls to C land 3776 // 3777 // When entering C land, the rbp, & rsp of the last Java frame have to be recorded 3778 // in the (thread-local) JavaThread object. When leaving C land, the last Java fp 3779 // has to be reset to 0. This is required to allow proper stack traversal. 3780 void MacroAssembler::set_last_Java_frame(Register java_thread, 3781 Register last_java_sp, 3782 Register last_java_fp, 3783 address last_java_pc) { 3784 vzeroupper(); 3785 // determine java_thread register 3786 if (!java_thread->is_valid()) { 3787 java_thread = rdi; 3788 get_thread(java_thread); 3789 } 3790 // determine last_java_sp register 3791 if (!last_java_sp->is_valid()) { 3792 last_java_sp = rsp; 3793 } 3794 3795 // last_java_fp is optional 3796 3797 if (last_java_fp->is_valid()) { 3798 movptr(Address(java_thread, JavaThread::last_Java_fp_offset()), last_java_fp); 3799 } 3800 3801 // last_java_pc is optional 3802 3803 if (last_java_pc != NULL) { 3804 lea(Address(java_thread, 3805 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset()), 3806 InternalAddress(last_java_pc)); 3807 3808 } 3809 movptr(Address(java_thread, JavaThread::last_Java_sp_offset()), last_java_sp); 3810 } 3811 3812 void MacroAssembler::shlptr(Register dst, int imm8) { 3813 LP64_ONLY(shlq(dst, imm8)) NOT_LP64(shll(dst, imm8)); 3814 } 3815 3816 void MacroAssembler::shrptr(Register dst, int imm8) { 3817 LP64_ONLY(shrq(dst, imm8)) NOT_LP64(shrl(dst, imm8)); 3818 } 3819 3820 void MacroAssembler::sign_extend_byte(Register reg) { 3821 if (LP64_ONLY(true ||) (VM_Version::is_P6() && reg->has_byte_register())) { 3822 movsbl(reg, reg); // movsxb 3823 } else { 3824 shll(reg, 24); 3825 sarl(reg, 24); 3826 } 3827 } 3828 3829 void MacroAssembler::sign_extend_short(Register reg) { 3830 if (LP64_ONLY(true ||) VM_Version::is_P6()) { 3831 movswl(reg, reg); // movsxw 3832 } else { 3833 shll(reg, 16); 3834 sarl(reg, 16); 3835 } 3836 } 3837 3838 void MacroAssembler::testl(Register dst, AddressLiteral src) { 3839 assert(reachable(src), "Address should be reachable"); 3840 testl(dst, as_Address(src)); 3841 } 3842 3843 void MacroAssembler::pcmpeqb(XMMRegister dst, XMMRegister src) { 3844 int dst_enc = dst->encoding(); 3845 int src_enc = src->encoding(); 3846 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 3847 Assembler::pcmpeqb(dst, src); 3848 } else if ((dst_enc < 16) && (src_enc < 16)) { 3849 Assembler::pcmpeqb(dst, src); 3850 } else if (src_enc < 16) { 3851 subptr(rsp, 64); 3852 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3853 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 3854 Assembler::pcmpeqb(xmm0, src); 3855 movdqu(dst, xmm0); 3856 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3857 addptr(rsp, 64); 3858 } else if (dst_enc < 16) { 3859 subptr(rsp, 64); 3860 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3861 evmovdqul(xmm0, src, Assembler::AVX_512bit); 3862 Assembler::pcmpeqb(dst, xmm0); 3863 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3864 addptr(rsp, 64); 3865 } else { 3866 subptr(rsp, 64); 3867 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3868 subptr(rsp, 64); 3869 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 3870 movdqu(xmm0, src); 3871 movdqu(xmm1, dst); 3872 Assembler::pcmpeqb(xmm1, xmm0); 3873 movdqu(dst, xmm1); 3874 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 3875 addptr(rsp, 64); 3876 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3877 addptr(rsp, 64); 3878 } 3879 } 3880 3881 void MacroAssembler::pcmpeqw(XMMRegister dst, XMMRegister src) { 3882 int dst_enc = dst->encoding(); 3883 int src_enc = src->encoding(); 3884 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 3885 Assembler::pcmpeqw(dst, src); 3886 } else if ((dst_enc < 16) && (src_enc < 16)) { 3887 Assembler::pcmpeqw(dst, src); 3888 } else if (src_enc < 16) { 3889 subptr(rsp, 64); 3890 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3891 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 3892 Assembler::pcmpeqw(xmm0, src); 3893 movdqu(dst, xmm0); 3894 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3895 addptr(rsp, 64); 3896 } else if (dst_enc < 16) { 3897 subptr(rsp, 64); 3898 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3899 evmovdqul(xmm0, src, Assembler::AVX_512bit); 3900 Assembler::pcmpeqw(dst, xmm0); 3901 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3902 addptr(rsp, 64); 3903 } else { 3904 subptr(rsp, 64); 3905 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3906 subptr(rsp, 64); 3907 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 3908 movdqu(xmm0, src); 3909 movdqu(xmm1, dst); 3910 Assembler::pcmpeqw(xmm1, xmm0); 3911 movdqu(dst, xmm1); 3912 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 3913 addptr(rsp, 64); 3914 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3915 addptr(rsp, 64); 3916 } 3917 } 3918 3919 void MacroAssembler::pcmpestri(XMMRegister dst, Address src, int imm8) { 3920 int dst_enc = dst->encoding(); 3921 if (dst_enc < 16) { 3922 Assembler::pcmpestri(dst, src, imm8); 3923 } else { 3924 subptr(rsp, 64); 3925 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3926 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 3927 Assembler::pcmpestri(xmm0, src, imm8); 3928 movdqu(dst, xmm0); 3929 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3930 addptr(rsp, 64); 3931 } 3932 } 3933 3934 void MacroAssembler::pcmpestri(XMMRegister dst, XMMRegister src, int imm8) { 3935 int dst_enc = dst->encoding(); 3936 int src_enc = src->encoding(); 3937 if ((dst_enc < 16) && (src_enc < 16)) { 3938 Assembler::pcmpestri(dst, src, imm8); 3939 } else if (src_enc < 16) { 3940 subptr(rsp, 64); 3941 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3942 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 3943 Assembler::pcmpestri(xmm0, src, imm8); 3944 movdqu(dst, xmm0); 3945 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3946 addptr(rsp, 64); 3947 } else if (dst_enc < 16) { 3948 subptr(rsp, 64); 3949 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3950 evmovdqul(xmm0, src, Assembler::AVX_512bit); 3951 Assembler::pcmpestri(dst, xmm0, imm8); 3952 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3953 addptr(rsp, 64); 3954 } else { 3955 subptr(rsp, 64); 3956 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3957 subptr(rsp, 64); 3958 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 3959 movdqu(xmm0, src); 3960 movdqu(xmm1, dst); 3961 Assembler::pcmpestri(xmm1, xmm0, imm8); 3962 movdqu(dst, xmm1); 3963 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 3964 addptr(rsp, 64); 3965 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3966 addptr(rsp, 64); 3967 } 3968 } 3969 3970 void MacroAssembler::pmovzxbw(XMMRegister dst, XMMRegister src) { 3971 int dst_enc = dst->encoding(); 3972 int src_enc = src->encoding(); 3973 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 3974 Assembler::pmovzxbw(dst, src); 3975 } else if ((dst_enc < 16) && (src_enc < 16)) { 3976 Assembler::pmovzxbw(dst, src); 3977 } else if (src_enc < 16) { 3978 subptr(rsp, 64); 3979 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3980 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 3981 Assembler::pmovzxbw(xmm0, src); 3982 movdqu(dst, xmm0); 3983 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3984 addptr(rsp, 64); 3985 } else if (dst_enc < 16) { 3986 subptr(rsp, 64); 3987 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3988 evmovdqul(xmm0, src, Assembler::AVX_512bit); 3989 Assembler::pmovzxbw(dst, xmm0); 3990 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3991 addptr(rsp, 64); 3992 } else { 3993 subptr(rsp, 64); 3994 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3995 subptr(rsp, 64); 3996 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 3997 movdqu(xmm0, src); 3998 movdqu(xmm1, dst); 3999 Assembler::pmovzxbw(xmm1, xmm0); 4000 movdqu(dst, xmm1); 4001 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4002 addptr(rsp, 64); 4003 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4004 addptr(rsp, 64); 4005 } 4006 } 4007 4008 void MacroAssembler::pmovzxbw(XMMRegister dst, Address src) { 4009 int dst_enc = dst->encoding(); 4010 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4011 Assembler::pmovzxbw(dst, src); 4012 } else if (dst_enc < 16) { 4013 Assembler::pmovzxbw(dst, src); 4014 } else { 4015 subptr(rsp, 64); 4016 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4017 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4018 Assembler::pmovzxbw(xmm0, src); 4019 movdqu(dst, xmm0); 4020 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4021 addptr(rsp, 64); 4022 } 4023 } 4024 4025 void MacroAssembler::pmovmskb(Register dst, XMMRegister src) { 4026 int src_enc = src->encoding(); 4027 if (src_enc < 16) { 4028 Assembler::pmovmskb(dst, src); 4029 } else { 4030 subptr(rsp, 64); 4031 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4032 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4033 Assembler::pmovmskb(dst, xmm0); 4034 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4035 addptr(rsp, 64); 4036 } 4037 } 4038 4039 void MacroAssembler::ptest(XMMRegister dst, XMMRegister src) { 4040 int dst_enc = dst->encoding(); 4041 int src_enc = src->encoding(); 4042 if ((dst_enc < 16) && (src_enc < 16)) { 4043 Assembler::ptest(dst, src); 4044 } else if (src_enc < 16) { 4045 subptr(rsp, 64); 4046 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4047 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4048 Assembler::ptest(xmm0, src); 4049 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4050 addptr(rsp, 64); 4051 } else if (dst_enc < 16) { 4052 subptr(rsp, 64); 4053 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4054 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4055 Assembler::ptest(dst, xmm0); 4056 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4057 addptr(rsp, 64); 4058 } else { 4059 subptr(rsp, 64); 4060 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4061 subptr(rsp, 64); 4062 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4063 movdqu(xmm0, src); 4064 movdqu(xmm1, dst); 4065 Assembler::ptest(xmm1, xmm0); 4066 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4067 addptr(rsp, 64); 4068 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4069 addptr(rsp, 64); 4070 } 4071 } 4072 4073 void MacroAssembler::sqrtsd(XMMRegister dst, AddressLiteral src) { 4074 if (reachable(src)) { 4075 Assembler::sqrtsd(dst, as_Address(src)); 4076 } else { 4077 lea(rscratch1, src); 4078 Assembler::sqrtsd(dst, Address(rscratch1, 0)); 4079 } 4080 } 4081 4082 void MacroAssembler::sqrtss(XMMRegister dst, AddressLiteral src) { 4083 if (reachable(src)) { 4084 Assembler::sqrtss(dst, as_Address(src)); 4085 } else { 4086 lea(rscratch1, src); 4087 Assembler::sqrtss(dst, Address(rscratch1, 0)); 4088 } 4089 } 4090 4091 void MacroAssembler::subsd(XMMRegister dst, AddressLiteral src) { 4092 if (reachable(src)) { 4093 Assembler::subsd(dst, as_Address(src)); 4094 } else { 4095 lea(rscratch1, src); 4096 Assembler::subsd(dst, Address(rscratch1, 0)); 4097 } 4098 } 4099 4100 void MacroAssembler::subss(XMMRegister dst, AddressLiteral src) { 4101 if (reachable(src)) { 4102 Assembler::subss(dst, as_Address(src)); 4103 } else { 4104 lea(rscratch1, src); 4105 Assembler::subss(dst, Address(rscratch1, 0)); 4106 } 4107 } 4108 4109 void MacroAssembler::ucomisd(XMMRegister dst, AddressLiteral src) { 4110 if (reachable(src)) { 4111 Assembler::ucomisd(dst, as_Address(src)); 4112 } else { 4113 lea(rscratch1, src); 4114 Assembler::ucomisd(dst, Address(rscratch1, 0)); 4115 } 4116 } 4117 4118 void MacroAssembler::ucomiss(XMMRegister dst, AddressLiteral src) { 4119 if (reachable(src)) { 4120 Assembler::ucomiss(dst, as_Address(src)); 4121 } else { 4122 lea(rscratch1, src); 4123 Assembler::ucomiss(dst, Address(rscratch1, 0)); 4124 } 4125 } 4126 4127 void MacroAssembler::xorpd(XMMRegister dst, AddressLiteral src) { 4128 // Used in sign-bit flipping with aligned address. 4129 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes"); 4130 if (reachable(src)) { 4131 Assembler::xorpd(dst, as_Address(src)); 4132 } else { 4133 lea(rscratch1, src); 4134 Assembler::xorpd(dst, Address(rscratch1, 0)); 4135 } 4136 } 4137 4138 void MacroAssembler::xorpd(XMMRegister dst, XMMRegister src) { 4139 if (UseAVX > 2 && !VM_Version::supports_avx512dq() && (dst->encoding() == src->encoding())) { 4140 Assembler::vpxor(dst, dst, src, Assembler::AVX_512bit); 4141 } 4142 else { 4143 Assembler::xorpd(dst, src); 4144 } 4145 } 4146 4147 void MacroAssembler::xorps(XMMRegister dst, XMMRegister src) { 4148 if (UseAVX > 2 && !VM_Version::supports_avx512dq() && (dst->encoding() == src->encoding())) { 4149 Assembler::vpxor(dst, dst, src, Assembler::AVX_512bit); 4150 } else { 4151 Assembler::xorps(dst, src); 4152 } 4153 } 4154 4155 void MacroAssembler::xorps(XMMRegister dst, AddressLiteral src) { 4156 // Used in sign-bit flipping with aligned address. 4157 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes"); 4158 if (reachable(src)) { 4159 Assembler::xorps(dst, as_Address(src)); 4160 } else { 4161 lea(rscratch1, src); 4162 Assembler::xorps(dst, Address(rscratch1, 0)); 4163 } 4164 } 4165 4166 void MacroAssembler::pshufb(XMMRegister dst, AddressLiteral src) { 4167 // Used in sign-bit flipping with aligned address. 4168 bool aligned_adr = (((intptr_t)src.target() & 15) == 0); 4169 assert((UseAVX > 0) || aligned_adr, "SSE mode requires address alignment 16 bytes"); 4170 if (reachable(src)) { 4171 Assembler::pshufb(dst, as_Address(src)); 4172 } else { 4173 lea(rscratch1, src); 4174 Assembler::pshufb(dst, Address(rscratch1, 0)); 4175 } 4176 } 4177 4178 // AVX 3-operands instructions 4179 4180 void MacroAssembler::vaddsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { 4181 if (reachable(src)) { 4182 vaddsd(dst, nds, as_Address(src)); 4183 } else { 4184 lea(rscratch1, src); 4185 vaddsd(dst, nds, Address(rscratch1, 0)); 4186 } 4187 } 4188 4189 void MacroAssembler::vaddss(XMMRegister dst, XMMRegister nds, AddressLiteral src) { 4190 if (reachable(src)) { 4191 vaddss(dst, nds, as_Address(src)); 4192 } else { 4193 lea(rscratch1, src); 4194 vaddss(dst, nds, Address(rscratch1, 0)); 4195 } 4196 } 4197 4198 void MacroAssembler::vabsss(XMMRegister dst, XMMRegister nds, XMMRegister src, AddressLiteral negate_field, int vector_len) { 4199 int dst_enc = dst->encoding(); 4200 int nds_enc = nds->encoding(); 4201 int src_enc = src->encoding(); 4202 if ((dst_enc < 16) && (nds_enc < 16)) { 4203 vandps(dst, nds, negate_field, vector_len); 4204 } else if ((src_enc < 16) && (dst_enc < 16)) { 4205 evmovdqul(src, nds, Assembler::AVX_512bit); 4206 vandps(dst, src, negate_field, vector_len); 4207 } else if (src_enc < 16) { 4208 evmovdqul(src, nds, Assembler::AVX_512bit); 4209 vandps(src, src, negate_field, vector_len); 4210 evmovdqul(dst, src, Assembler::AVX_512bit); 4211 } else if (dst_enc < 16) { 4212 evmovdqul(src, xmm0, Assembler::AVX_512bit); 4213 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4214 vandps(dst, xmm0, negate_field, vector_len); 4215 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4216 } else { 4217 if (src_enc != dst_enc) { 4218 evmovdqul(src, xmm0, Assembler::AVX_512bit); 4219 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4220 vandps(xmm0, xmm0, negate_field, vector_len); 4221 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4222 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4223 } else { 4224 subptr(rsp, 64); 4225 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4226 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4227 vandps(xmm0, xmm0, negate_field, vector_len); 4228 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4229 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4230 addptr(rsp, 64); 4231 } 4232 } 4233 } 4234 4235 void MacroAssembler::vabssd(XMMRegister dst, XMMRegister nds, XMMRegister src, AddressLiteral negate_field, int vector_len) { 4236 int dst_enc = dst->encoding(); 4237 int nds_enc = nds->encoding(); 4238 int src_enc = src->encoding(); 4239 if ((dst_enc < 16) && (nds_enc < 16)) { 4240 vandpd(dst, nds, negate_field, vector_len); 4241 } else if ((src_enc < 16) && (dst_enc < 16)) { 4242 evmovdqul(src, nds, Assembler::AVX_512bit); 4243 vandpd(dst, src, negate_field, vector_len); 4244 } else if (src_enc < 16) { 4245 evmovdqul(src, nds, Assembler::AVX_512bit); 4246 vandpd(src, src, negate_field, vector_len); 4247 evmovdqul(dst, src, Assembler::AVX_512bit); 4248 } else if (dst_enc < 16) { 4249 evmovdqul(src, xmm0, Assembler::AVX_512bit); 4250 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4251 vandpd(dst, xmm0, negate_field, vector_len); 4252 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4253 } else { 4254 if (src_enc != dst_enc) { 4255 evmovdqul(src, xmm0, Assembler::AVX_512bit); 4256 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4257 vandpd(xmm0, xmm0, negate_field, vector_len); 4258 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4259 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4260 } else { 4261 subptr(rsp, 64); 4262 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4263 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4264 vandpd(xmm0, xmm0, negate_field, vector_len); 4265 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4266 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4267 addptr(rsp, 64); 4268 } 4269 } 4270 } 4271 4272 void MacroAssembler::vpaddb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) { 4273 int dst_enc = dst->encoding(); 4274 int nds_enc = nds->encoding(); 4275 int src_enc = src->encoding(); 4276 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4277 Assembler::vpaddb(dst, nds, src, vector_len); 4278 } else if ((dst_enc < 16) && (src_enc < 16)) { 4279 Assembler::vpaddb(dst, dst, src, vector_len); 4280 } else if ((dst_enc < 16) && (nds_enc < 16)) { 4281 // use nds as scratch for src 4282 evmovdqul(nds, src, Assembler::AVX_512bit); 4283 Assembler::vpaddb(dst, dst, nds, vector_len); 4284 } else if ((src_enc < 16) && (nds_enc < 16)) { 4285 // use nds as scratch for dst 4286 evmovdqul(nds, dst, Assembler::AVX_512bit); 4287 Assembler::vpaddb(nds, nds, src, vector_len); 4288 evmovdqul(dst, nds, Assembler::AVX_512bit); 4289 } else if (dst_enc < 16) { 4290 // use nds as scatch for xmm0 to hold src 4291 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4292 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4293 Assembler::vpaddb(dst, dst, xmm0, vector_len); 4294 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4295 } else { 4296 // worse case scenario, all regs are in the upper bank 4297 subptr(rsp, 64); 4298 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4299 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4300 evmovdqul(xmm1, src, Assembler::AVX_512bit); 4301 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4302 Assembler::vpaddb(xmm0, xmm0, xmm1, vector_len); 4303 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4304 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4305 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4306 addptr(rsp, 64); 4307 } 4308 } 4309 4310 void MacroAssembler::vpaddb(XMMRegister dst, XMMRegister nds, Address src, int vector_len) { 4311 int dst_enc = dst->encoding(); 4312 int nds_enc = nds->encoding(); 4313 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4314 Assembler::vpaddb(dst, nds, src, vector_len); 4315 } else if (dst_enc < 16) { 4316 Assembler::vpaddb(dst, dst, src, vector_len); 4317 } else if (nds_enc < 16) { 4318 // implies dst_enc in upper bank with src as scratch 4319 evmovdqul(nds, dst, Assembler::AVX_512bit); 4320 Assembler::vpaddb(nds, nds, src, vector_len); 4321 evmovdqul(dst, nds, Assembler::AVX_512bit); 4322 } else { 4323 // worse case scenario, all regs in upper bank 4324 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4325 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4326 Assembler::vpaddb(xmm0, xmm0, src, vector_len); 4327 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4328 } 4329 } 4330 4331 void MacroAssembler::vpaddw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) { 4332 int dst_enc = dst->encoding(); 4333 int nds_enc = nds->encoding(); 4334 int src_enc = src->encoding(); 4335 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4336 Assembler::vpaddw(dst, nds, src, vector_len); 4337 } else if ((dst_enc < 16) && (src_enc < 16)) { 4338 Assembler::vpaddw(dst, dst, src, vector_len); 4339 } else if ((dst_enc < 16) && (nds_enc < 16)) { 4340 // use nds as scratch for src 4341 evmovdqul(nds, src, Assembler::AVX_512bit); 4342 Assembler::vpaddw(dst, dst, nds, vector_len); 4343 } else if ((src_enc < 16) && (nds_enc < 16)) { 4344 // use nds as scratch for dst 4345 evmovdqul(nds, dst, Assembler::AVX_512bit); 4346 Assembler::vpaddw(nds, nds, src, vector_len); 4347 evmovdqul(dst, nds, Assembler::AVX_512bit); 4348 } else if (dst_enc < 16) { 4349 // use nds as scatch for xmm0 to hold src 4350 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4351 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4352 Assembler::vpaddw(dst, dst, xmm0, vector_len); 4353 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4354 } else { 4355 // worse case scenario, all regs are in the upper bank 4356 subptr(rsp, 64); 4357 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4358 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4359 evmovdqul(xmm1, src, Assembler::AVX_512bit); 4360 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4361 Assembler::vpaddw(xmm0, xmm0, xmm1, vector_len); 4362 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4363 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4364 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4365 addptr(rsp, 64); 4366 } 4367 } 4368 4369 void MacroAssembler::vpaddw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) { 4370 int dst_enc = dst->encoding(); 4371 int nds_enc = nds->encoding(); 4372 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4373 Assembler::vpaddw(dst, nds, src, vector_len); 4374 } else if (dst_enc < 16) { 4375 Assembler::vpaddw(dst, dst, src, vector_len); 4376 } else if (nds_enc < 16) { 4377 // implies dst_enc in upper bank with src as scratch 4378 evmovdqul(nds, dst, Assembler::AVX_512bit); 4379 Assembler::vpaddw(nds, nds, src, vector_len); 4380 evmovdqul(dst, nds, Assembler::AVX_512bit); 4381 } else { 4382 // worse case scenario, all regs in upper bank 4383 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4384 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4385 Assembler::vpaddw(xmm0, xmm0, src, vector_len); 4386 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4387 } 4388 } 4389 4390 void MacroAssembler::vpand(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len) { 4391 if (reachable(src)) { 4392 Assembler::vpand(dst, nds, as_Address(src), vector_len); 4393 } else { 4394 lea(rscratch1, src); 4395 Assembler::vpand(dst, nds, Address(rscratch1, 0), vector_len); 4396 } 4397 } 4398 4399 void MacroAssembler::vpbroadcastw(XMMRegister dst, XMMRegister src) { 4400 int dst_enc = dst->encoding(); 4401 int src_enc = src->encoding(); 4402 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4403 Assembler::vpbroadcastw(dst, src); 4404 } else if ((dst_enc < 16) && (src_enc < 16)) { 4405 Assembler::vpbroadcastw(dst, src); 4406 } else if (src_enc < 16) { 4407 subptr(rsp, 64); 4408 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4409 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4410 Assembler::vpbroadcastw(xmm0, src); 4411 movdqu(dst, xmm0); 4412 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4413 addptr(rsp, 64); 4414 } else if (dst_enc < 16) { 4415 subptr(rsp, 64); 4416 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4417 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4418 Assembler::vpbroadcastw(dst, xmm0); 4419 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4420 addptr(rsp, 64); 4421 } else { 4422 subptr(rsp, 64); 4423 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4424 subptr(rsp, 64); 4425 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4426 movdqu(xmm0, src); 4427 movdqu(xmm1, dst); 4428 Assembler::vpbroadcastw(xmm1, xmm0); 4429 movdqu(dst, xmm1); 4430 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4431 addptr(rsp, 64); 4432 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4433 addptr(rsp, 64); 4434 } 4435 } 4436 4437 void MacroAssembler::vpcmpeqb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) { 4438 int dst_enc = dst->encoding(); 4439 int nds_enc = nds->encoding(); 4440 int src_enc = src->encoding(); 4441 assert(dst_enc == nds_enc, ""); 4442 if ((dst_enc < 16) && (src_enc < 16)) { 4443 Assembler::vpcmpeqb(dst, nds, src, vector_len); 4444 } else if (src_enc < 16) { 4445 subptr(rsp, 64); 4446 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4447 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4448 Assembler::vpcmpeqb(xmm0, xmm0, src, vector_len); 4449 movdqu(dst, xmm0); 4450 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4451 addptr(rsp, 64); 4452 } else if (dst_enc < 16) { 4453 subptr(rsp, 64); 4454 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4455 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4456 Assembler::vpcmpeqb(dst, dst, xmm0, vector_len); 4457 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4458 addptr(rsp, 64); 4459 } else { 4460 subptr(rsp, 64); 4461 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4462 subptr(rsp, 64); 4463 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4464 movdqu(xmm0, src); 4465 movdqu(xmm1, dst); 4466 Assembler::vpcmpeqb(xmm1, xmm1, xmm0, vector_len); 4467 movdqu(dst, xmm1); 4468 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4469 addptr(rsp, 64); 4470 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4471 addptr(rsp, 64); 4472 } 4473 } 4474 4475 void MacroAssembler::vpcmpeqw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) { 4476 int dst_enc = dst->encoding(); 4477 int nds_enc = nds->encoding(); 4478 int src_enc = src->encoding(); 4479 assert(dst_enc == nds_enc, ""); 4480 if ((dst_enc < 16) && (src_enc < 16)) { 4481 Assembler::vpcmpeqw(dst, nds, src, vector_len); 4482 } else if (src_enc < 16) { 4483 subptr(rsp, 64); 4484 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4485 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4486 Assembler::vpcmpeqw(xmm0, xmm0, src, vector_len); 4487 movdqu(dst, xmm0); 4488 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4489 addptr(rsp, 64); 4490 } else if (dst_enc < 16) { 4491 subptr(rsp, 64); 4492 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4493 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4494 Assembler::vpcmpeqw(dst, dst, xmm0, vector_len); 4495 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4496 addptr(rsp, 64); 4497 } else { 4498 subptr(rsp, 64); 4499 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4500 subptr(rsp, 64); 4501 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4502 movdqu(xmm0, src); 4503 movdqu(xmm1, dst); 4504 Assembler::vpcmpeqw(xmm1, xmm1, xmm0, vector_len); 4505 movdqu(dst, xmm1); 4506 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4507 addptr(rsp, 64); 4508 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4509 addptr(rsp, 64); 4510 } 4511 } 4512 4513 void MacroAssembler::vpmovzxbw(XMMRegister dst, Address src, int vector_len) { 4514 int dst_enc = dst->encoding(); 4515 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4516 Assembler::vpmovzxbw(dst, src, vector_len); 4517 } else if (dst_enc < 16) { 4518 Assembler::vpmovzxbw(dst, src, vector_len); 4519 } else { 4520 subptr(rsp, 64); 4521 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4522 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4523 Assembler::vpmovzxbw(xmm0, src, vector_len); 4524 movdqu(dst, xmm0); 4525 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4526 addptr(rsp, 64); 4527 } 4528 } 4529 4530 void MacroAssembler::vpmovmskb(Register dst, XMMRegister src) { 4531 int src_enc = src->encoding(); 4532 if (src_enc < 16) { 4533 Assembler::vpmovmskb(dst, src); 4534 } else { 4535 subptr(rsp, 64); 4536 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4537 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4538 Assembler::vpmovmskb(dst, xmm0); 4539 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4540 addptr(rsp, 64); 4541 } 4542 } 4543 4544 void MacroAssembler::vpmullw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) { 4545 int dst_enc = dst->encoding(); 4546 int nds_enc = nds->encoding(); 4547 int src_enc = src->encoding(); 4548 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4549 Assembler::vpmullw(dst, nds, src, vector_len); 4550 } else if ((dst_enc < 16) && (src_enc < 16)) { 4551 Assembler::vpmullw(dst, dst, src, vector_len); 4552 } else if ((dst_enc < 16) && (nds_enc < 16)) { 4553 // use nds as scratch for src 4554 evmovdqul(nds, src, Assembler::AVX_512bit); 4555 Assembler::vpmullw(dst, dst, nds, vector_len); 4556 } else if ((src_enc < 16) && (nds_enc < 16)) { 4557 // use nds as scratch for dst 4558 evmovdqul(nds, dst, Assembler::AVX_512bit); 4559 Assembler::vpmullw(nds, nds, src, vector_len); 4560 evmovdqul(dst, nds, Assembler::AVX_512bit); 4561 } else if (dst_enc < 16) { 4562 // use nds as scatch for xmm0 to hold src 4563 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4564 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4565 Assembler::vpmullw(dst, dst, xmm0, vector_len); 4566 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4567 } else { 4568 // worse case scenario, all regs are in the upper bank 4569 subptr(rsp, 64); 4570 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4571 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4572 evmovdqul(xmm1, src, Assembler::AVX_512bit); 4573 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4574 Assembler::vpmullw(xmm0, xmm0, xmm1, vector_len); 4575 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4576 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4577 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4578 addptr(rsp, 64); 4579 } 4580 } 4581 4582 void MacroAssembler::vpmullw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) { 4583 int dst_enc = dst->encoding(); 4584 int nds_enc = nds->encoding(); 4585 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4586 Assembler::vpmullw(dst, nds, src, vector_len); 4587 } else if (dst_enc < 16) { 4588 Assembler::vpmullw(dst, dst, src, vector_len); 4589 } else if (nds_enc < 16) { 4590 // implies dst_enc in upper bank with src as scratch 4591 evmovdqul(nds, dst, Assembler::AVX_512bit); 4592 Assembler::vpmullw(nds, nds, src, vector_len); 4593 evmovdqul(dst, nds, Assembler::AVX_512bit); 4594 } else { 4595 // worse case scenario, all regs in upper bank 4596 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4597 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4598 Assembler::vpmullw(xmm0, xmm0, src, vector_len); 4599 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4600 } 4601 } 4602 4603 void MacroAssembler::vpsubb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) { 4604 int dst_enc = dst->encoding(); 4605 int nds_enc = nds->encoding(); 4606 int src_enc = src->encoding(); 4607 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4608 Assembler::vpsubb(dst, nds, src, vector_len); 4609 } else if ((dst_enc < 16) && (src_enc < 16)) { 4610 Assembler::vpsubb(dst, dst, src, vector_len); 4611 } else if ((dst_enc < 16) && (nds_enc < 16)) { 4612 // use nds as scratch for src 4613 evmovdqul(nds, src, Assembler::AVX_512bit); 4614 Assembler::vpsubb(dst, dst, nds, vector_len); 4615 } else if ((src_enc < 16) && (nds_enc < 16)) { 4616 // use nds as scratch for dst 4617 evmovdqul(nds, dst, Assembler::AVX_512bit); 4618 Assembler::vpsubb(nds, nds, src, vector_len); 4619 evmovdqul(dst, nds, Assembler::AVX_512bit); 4620 } else if (dst_enc < 16) { 4621 // use nds as scatch for xmm0 to hold src 4622 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4623 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4624 Assembler::vpsubb(dst, dst, xmm0, vector_len); 4625 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4626 } else { 4627 // worse case scenario, all regs are in the upper bank 4628 subptr(rsp, 64); 4629 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4630 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4631 evmovdqul(xmm1, src, Assembler::AVX_512bit); 4632 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4633 Assembler::vpsubb(xmm0, xmm0, xmm1, vector_len); 4634 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4635 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4636 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4637 addptr(rsp, 64); 4638 } 4639 } 4640 4641 void MacroAssembler::vpsubb(XMMRegister dst, XMMRegister nds, Address src, int vector_len) { 4642 int dst_enc = dst->encoding(); 4643 int nds_enc = nds->encoding(); 4644 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4645 Assembler::vpsubb(dst, nds, src, vector_len); 4646 } else if (dst_enc < 16) { 4647 Assembler::vpsubb(dst, dst, src, vector_len); 4648 } else if (nds_enc < 16) { 4649 // implies dst_enc in upper bank with src as scratch 4650 evmovdqul(nds, dst, Assembler::AVX_512bit); 4651 Assembler::vpsubb(nds, nds, src, vector_len); 4652 evmovdqul(dst, nds, Assembler::AVX_512bit); 4653 } else { 4654 // worse case scenario, all regs in upper bank 4655 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4656 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4657 Assembler::vpsubw(xmm0, xmm0, src, vector_len); 4658 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4659 } 4660 } 4661 4662 void MacroAssembler::vpsubw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) { 4663 int dst_enc = dst->encoding(); 4664 int nds_enc = nds->encoding(); 4665 int src_enc = src->encoding(); 4666 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4667 Assembler::vpsubw(dst, nds, src, vector_len); 4668 } else if ((dst_enc < 16) && (src_enc < 16)) { 4669 Assembler::vpsubw(dst, dst, src, vector_len); 4670 } else if ((dst_enc < 16) && (nds_enc < 16)) { 4671 // use nds as scratch for src 4672 evmovdqul(nds, src, Assembler::AVX_512bit); 4673 Assembler::vpsubw(dst, dst, nds, vector_len); 4674 } else if ((src_enc < 16) && (nds_enc < 16)) { 4675 // use nds as scratch for dst 4676 evmovdqul(nds, dst, Assembler::AVX_512bit); 4677 Assembler::vpsubw(nds, nds, src, vector_len); 4678 evmovdqul(dst, nds, Assembler::AVX_512bit); 4679 } else if (dst_enc < 16) { 4680 // use nds as scatch for xmm0 to hold src 4681 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4682 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4683 Assembler::vpsubw(dst, dst, xmm0, vector_len); 4684 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4685 } else { 4686 // worse case scenario, all regs are in the upper bank 4687 subptr(rsp, 64); 4688 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4689 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4690 evmovdqul(xmm1, src, Assembler::AVX_512bit); 4691 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4692 Assembler::vpsubw(xmm0, xmm0, xmm1, vector_len); 4693 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4694 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4695 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4696 addptr(rsp, 64); 4697 } 4698 } 4699 4700 void MacroAssembler::vpsubw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) { 4701 int dst_enc = dst->encoding(); 4702 int nds_enc = nds->encoding(); 4703 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4704 Assembler::vpsubw(dst, nds, src, vector_len); 4705 } else if (dst_enc < 16) { 4706 Assembler::vpsubw(dst, dst, src, vector_len); 4707 } else if (nds_enc < 16) { 4708 // implies dst_enc in upper bank with src as scratch 4709 evmovdqul(nds, dst, Assembler::AVX_512bit); 4710 Assembler::vpsubw(nds, nds, src, vector_len); 4711 evmovdqul(dst, nds, Assembler::AVX_512bit); 4712 } else { 4713 // worse case scenario, all regs in upper bank 4714 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4715 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4716 Assembler::vpsubw(xmm0, xmm0, src, vector_len); 4717 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4718 } 4719 } 4720 4721 void MacroAssembler::vpsraw(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) { 4722 int dst_enc = dst->encoding(); 4723 int nds_enc = nds->encoding(); 4724 int shift_enc = shift->encoding(); 4725 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4726 Assembler::vpsraw(dst, nds, shift, vector_len); 4727 } else if ((dst_enc < 16) && (shift_enc < 16)) { 4728 Assembler::vpsraw(dst, dst, shift, vector_len); 4729 } else if ((dst_enc < 16) && (nds_enc < 16)) { 4730 // use nds_enc as scratch with shift 4731 evmovdqul(nds, shift, Assembler::AVX_512bit); 4732 Assembler::vpsraw(dst, dst, nds, vector_len); 4733 } else if ((shift_enc < 16) && (nds_enc < 16)) { 4734 // use nds as scratch with dst 4735 evmovdqul(nds, dst, Assembler::AVX_512bit); 4736 Assembler::vpsraw(nds, nds, shift, vector_len); 4737 evmovdqul(dst, nds, Assembler::AVX_512bit); 4738 } else if (dst_enc < 16) { 4739 // use nds to save a copy of xmm0 and hold shift 4740 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4741 evmovdqul(xmm0, shift, Assembler::AVX_512bit); 4742 Assembler::vpsraw(dst, dst, xmm0, vector_len); 4743 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4744 } else if (nds_enc < 16) { 4745 // use nds as dest as temps 4746 evmovdqul(nds, dst, Assembler::AVX_512bit); 4747 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4748 evmovdqul(xmm0, shift, Assembler::AVX_512bit); 4749 Assembler::vpsraw(nds, nds, xmm0, vector_len); 4750 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4751 evmovdqul(dst, nds, Assembler::AVX_512bit); 4752 } else { 4753 // worse case scenario, all regs are in the upper bank 4754 subptr(rsp, 64); 4755 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4756 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4757 evmovdqul(xmm1, shift, Assembler::AVX_512bit); 4758 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4759 Assembler::vpsllw(xmm0, xmm0, xmm1, vector_len); 4760 evmovdqul(xmm1, dst, Assembler::AVX_512bit); 4761 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4762 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4763 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4764 addptr(rsp, 64); 4765 } 4766 } 4767 4768 void MacroAssembler::vpsraw(XMMRegister dst, XMMRegister nds, int shift, int vector_len) { 4769 int dst_enc = dst->encoding(); 4770 int nds_enc = nds->encoding(); 4771 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4772 Assembler::vpsraw(dst, nds, shift, vector_len); 4773 } else if (dst_enc < 16) { 4774 Assembler::vpsraw(dst, dst, shift, vector_len); 4775 } else if (nds_enc < 16) { 4776 // use nds as scratch 4777 evmovdqul(nds, dst, Assembler::AVX_512bit); 4778 Assembler::vpsraw(nds, nds, shift, vector_len); 4779 evmovdqul(dst, nds, Assembler::AVX_512bit); 4780 } else { 4781 // use nds as scratch for xmm0 4782 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4783 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4784 Assembler::vpsraw(xmm0, xmm0, shift, vector_len); 4785 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4786 } 4787 } 4788 4789 void MacroAssembler::vpsrlw(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) { 4790 int dst_enc = dst->encoding(); 4791 int nds_enc = nds->encoding(); 4792 int shift_enc = shift->encoding(); 4793 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4794 Assembler::vpsrlw(dst, nds, shift, vector_len); 4795 } else if ((dst_enc < 16) && (shift_enc < 16)) { 4796 Assembler::vpsrlw(dst, dst, shift, vector_len); 4797 } else if ((dst_enc < 16) && (nds_enc < 16)) { 4798 // use nds_enc as scratch with shift 4799 evmovdqul(nds, shift, Assembler::AVX_512bit); 4800 Assembler::vpsrlw(dst, dst, nds, vector_len); 4801 } else if ((shift_enc < 16) && (nds_enc < 16)) { 4802 // use nds as scratch with dst 4803 evmovdqul(nds, dst, Assembler::AVX_512bit); 4804 Assembler::vpsrlw(nds, nds, shift, vector_len); 4805 evmovdqul(dst, nds, Assembler::AVX_512bit); 4806 } else if (dst_enc < 16) { 4807 // use nds to save a copy of xmm0 and hold shift 4808 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4809 evmovdqul(xmm0, shift, Assembler::AVX_512bit); 4810 Assembler::vpsrlw(dst, dst, xmm0, vector_len); 4811 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4812 } else if (nds_enc < 16) { 4813 // use nds as dest as temps 4814 evmovdqul(nds, dst, Assembler::AVX_512bit); 4815 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4816 evmovdqul(xmm0, shift, Assembler::AVX_512bit); 4817 Assembler::vpsrlw(nds, nds, xmm0, vector_len); 4818 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4819 evmovdqul(dst, nds, Assembler::AVX_512bit); 4820 } else { 4821 // worse case scenario, all regs are in the upper bank 4822 subptr(rsp, 64); 4823 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4824 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4825 evmovdqul(xmm1, shift, Assembler::AVX_512bit); 4826 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4827 Assembler::vpsllw(xmm0, xmm0, xmm1, vector_len); 4828 evmovdqul(xmm1, dst, Assembler::AVX_512bit); 4829 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4830 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4831 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4832 addptr(rsp, 64); 4833 } 4834 } 4835 4836 void MacroAssembler::vpsrlw(XMMRegister dst, XMMRegister nds, int shift, int vector_len) { 4837 int dst_enc = dst->encoding(); 4838 int nds_enc = nds->encoding(); 4839 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4840 Assembler::vpsrlw(dst, nds, shift, vector_len); 4841 } else if (dst_enc < 16) { 4842 Assembler::vpsrlw(dst, dst, shift, vector_len); 4843 } else if (nds_enc < 16) { 4844 // use nds as scratch 4845 evmovdqul(nds, dst, Assembler::AVX_512bit); 4846 Assembler::vpsrlw(nds, nds, shift, vector_len); 4847 evmovdqul(dst, nds, Assembler::AVX_512bit); 4848 } else { 4849 // use nds as scratch for xmm0 4850 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4851 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4852 Assembler::vpsrlw(xmm0, xmm0, shift, vector_len); 4853 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4854 } 4855 } 4856 4857 void MacroAssembler::vpsllw(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) { 4858 int dst_enc = dst->encoding(); 4859 int nds_enc = nds->encoding(); 4860 int shift_enc = shift->encoding(); 4861 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4862 Assembler::vpsllw(dst, nds, shift, vector_len); 4863 } else if ((dst_enc < 16) && (shift_enc < 16)) { 4864 Assembler::vpsllw(dst, dst, shift, vector_len); 4865 } else if ((dst_enc < 16) && (nds_enc < 16)) { 4866 // use nds_enc as scratch with shift 4867 evmovdqul(nds, shift, Assembler::AVX_512bit); 4868 Assembler::vpsllw(dst, dst, nds, vector_len); 4869 } else if ((shift_enc < 16) && (nds_enc < 16)) { 4870 // use nds as scratch with dst 4871 evmovdqul(nds, dst, Assembler::AVX_512bit); 4872 Assembler::vpsllw(nds, nds, shift, vector_len); 4873 evmovdqul(dst, nds, Assembler::AVX_512bit); 4874 } else if (dst_enc < 16) { 4875 // use nds to save a copy of xmm0 and hold shift 4876 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4877 evmovdqul(xmm0, shift, Assembler::AVX_512bit); 4878 Assembler::vpsllw(dst, dst, xmm0, vector_len); 4879 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4880 } else if (nds_enc < 16) { 4881 // use nds as dest as temps 4882 evmovdqul(nds, dst, Assembler::AVX_512bit); 4883 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4884 evmovdqul(xmm0, shift, Assembler::AVX_512bit); 4885 Assembler::vpsllw(nds, nds, xmm0, vector_len); 4886 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4887 evmovdqul(dst, nds, Assembler::AVX_512bit); 4888 } else { 4889 // worse case scenario, all regs are in the upper bank 4890 subptr(rsp, 64); 4891 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4892 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4893 evmovdqul(xmm1, shift, Assembler::AVX_512bit); 4894 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4895 Assembler::vpsllw(xmm0, xmm0, xmm1, vector_len); 4896 evmovdqul(xmm1, dst, Assembler::AVX_512bit); 4897 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4898 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4899 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4900 addptr(rsp, 64); 4901 } 4902 } 4903 4904 void MacroAssembler::vpsllw(XMMRegister dst, XMMRegister nds, int shift, int vector_len) { 4905 int dst_enc = dst->encoding(); 4906 int nds_enc = nds->encoding(); 4907 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4908 Assembler::vpsllw(dst, nds, shift, vector_len); 4909 } else if (dst_enc < 16) { 4910 Assembler::vpsllw(dst, dst, shift, vector_len); 4911 } else if (nds_enc < 16) { 4912 // use nds as scratch 4913 evmovdqul(nds, dst, Assembler::AVX_512bit); 4914 Assembler::vpsllw(nds, nds, shift, vector_len); 4915 evmovdqul(dst, nds, Assembler::AVX_512bit); 4916 } else { 4917 // use nds as scratch for xmm0 4918 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4919 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4920 Assembler::vpsllw(xmm0, xmm0, shift, vector_len); 4921 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4922 } 4923 } 4924 4925 void MacroAssembler::vptest(XMMRegister dst, XMMRegister src) { 4926 int dst_enc = dst->encoding(); 4927 int src_enc = src->encoding(); 4928 if ((dst_enc < 16) && (src_enc < 16)) { 4929 Assembler::vptest(dst, src); 4930 } else if (src_enc < 16) { 4931 subptr(rsp, 64); 4932 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4933 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4934 Assembler::vptest(xmm0, src); 4935 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4936 addptr(rsp, 64); 4937 } else if (dst_enc < 16) { 4938 subptr(rsp, 64); 4939 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4940 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4941 Assembler::vptest(dst, xmm0); 4942 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4943 addptr(rsp, 64); 4944 } else { 4945 subptr(rsp, 64); 4946 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4947 subptr(rsp, 64); 4948 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4949 movdqu(xmm0, src); 4950 movdqu(xmm1, dst); 4951 Assembler::vptest(xmm1, xmm0); 4952 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4953 addptr(rsp, 64); 4954 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4955 addptr(rsp, 64); 4956 } 4957 } 4958 4959 // This instruction exists within macros, ergo we cannot control its input 4960 // when emitted through those patterns. 4961 void MacroAssembler::punpcklbw(XMMRegister dst, XMMRegister src) { 4962 if (VM_Version::supports_avx512nobw()) { 4963 int dst_enc = dst->encoding(); 4964 int src_enc = src->encoding(); 4965 if (dst_enc == src_enc) { 4966 if (dst_enc < 16) { 4967 Assembler::punpcklbw(dst, src); 4968 } else { 4969 subptr(rsp, 64); 4970 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4971 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4972 Assembler::punpcklbw(xmm0, xmm0); 4973 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4974 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4975 addptr(rsp, 64); 4976 } 4977 } else { 4978 if ((src_enc < 16) && (dst_enc < 16)) { 4979 Assembler::punpcklbw(dst, src); 4980 } else if (src_enc < 16) { 4981 subptr(rsp, 64); 4982 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4983 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4984 Assembler::punpcklbw(xmm0, src); 4985 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4986 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4987 addptr(rsp, 64); 4988 } else if (dst_enc < 16) { 4989 subptr(rsp, 64); 4990 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4991 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4992 Assembler::punpcklbw(dst, xmm0); 4993 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4994 addptr(rsp, 64); 4995 } else { 4996 subptr(rsp, 64); 4997 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4998 subptr(rsp, 64); 4999 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 5000 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 5001 evmovdqul(xmm1, src, Assembler::AVX_512bit); 5002 Assembler::punpcklbw(xmm0, xmm1); 5003 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 5004 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 5005 addptr(rsp, 64); 5006 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 5007 addptr(rsp, 64); 5008 } 5009 } 5010 } else { 5011 Assembler::punpcklbw(dst, src); 5012 } 5013 } 5014 5015 void MacroAssembler::pshufd(XMMRegister dst, Address src, int mode) { 5016 if (VM_Version::supports_avx512vl()) { 5017 Assembler::pshufd(dst, src, mode); 5018 } else { 5019 int dst_enc = dst->encoding(); 5020 if (dst_enc < 16) { 5021 Assembler::pshufd(dst, src, mode); 5022 } else { 5023 subptr(rsp, 64); 5024 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 5025 Assembler::pshufd(xmm0, src, mode); 5026 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 5027 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 5028 addptr(rsp, 64); 5029 } 5030 } 5031 } 5032 5033 // This instruction exists within macros, ergo we cannot control its input 5034 // when emitted through those patterns. 5035 void MacroAssembler::pshuflw(XMMRegister dst, XMMRegister src, int mode) { 5036 if (VM_Version::supports_avx512nobw()) { 5037 int dst_enc = dst->encoding(); 5038 int src_enc = src->encoding(); 5039 if (dst_enc == src_enc) { 5040 if (dst_enc < 16) { 5041 Assembler::pshuflw(dst, src, mode); 5042 } else { 5043 subptr(rsp, 64); 5044 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 5045 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 5046 Assembler::pshuflw(xmm0, xmm0, mode); 5047 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 5048 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 5049 addptr(rsp, 64); 5050 } 5051 } else { 5052 if ((src_enc < 16) && (dst_enc < 16)) { 5053 Assembler::pshuflw(dst, src, mode); 5054 } else if (src_enc < 16) { 5055 subptr(rsp, 64); 5056 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 5057 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 5058 Assembler::pshuflw(xmm0, src, mode); 5059 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 5060 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 5061 addptr(rsp, 64); 5062 } else if (dst_enc < 16) { 5063 subptr(rsp, 64); 5064 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 5065 evmovdqul(xmm0, src, Assembler::AVX_512bit); 5066 Assembler::pshuflw(dst, xmm0, mode); 5067 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 5068 addptr(rsp, 64); 5069 } else { 5070 subptr(rsp, 64); 5071 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 5072 subptr(rsp, 64); 5073 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 5074 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 5075 evmovdqul(xmm1, src, Assembler::AVX_512bit); 5076 Assembler::pshuflw(xmm0, xmm1, mode); 5077 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 5078 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 5079 addptr(rsp, 64); 5080 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 5081 addptr(rsp, 64); 5082 } 5083 } 5084 } else { 5085 Assembler::pshuflw(dst, src, mode); 5086 } 5087 } 5088 5089 void MacroAssembler::vandpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len) { 5090 if (reachable(src)) { 5091 vandpd(dst, nds, as_Address(src), vector_len); 5092 } else { 5093 lea(rscratch1, src); 5094 vandpd(dst, nds, Address(rscratch1, 0), vector_len); 5095 } 5096 } 5097 5098 void MacroAssembler::vandps(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len) { 5099 if (reachable(src)) { 5100 vandps(dst, nds, as_Address(src), vector_len); 5101 } else { 5102 lea(rscratch1, src); 5103 vandps(dst, nds, Address(rscratch1, 0), vector_len); 5104 } 5105 } 5106 5107 void MacroAssembler::vdivsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { 5108 if (reachable(src)) { 5109 vdivsd(dst, nds, as_Address(src)); 5110 } else { 5111 lea(rscratch1, src); 5112 vdivsd(dst, nds, Address(rscratch1, 0)); 5113 } 5114 } 5115 5116 void MacroAssembler::vdivss(XMMRegister dst, XMMRegister nds, AddressLiteral src) { 5117 if (reachable(src)) { 5118 vdivss(dst, nds, as_Address(src)); 5119 } else { 5120 lea(rscratch1, src); 5121 vdivss(dst, nds, Address(rscratch1, 0)); 5122 } 5123 } 5124 5125 void MacroAssembler::vmulsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { 5126 if (reachable(src)) { 5127 vmulsd(dst, nds, as_Address(src)); 5128 } else { 5129 lea(rscratch1, src); 5130 vmulsd(dst, nds, Address(rscratch1, 0)); 5131 } 5132 } 5133 5134 void MacroAssembler::vmulss(XMMRegister dst, XMMRegister nds, AddressLiteral src) { 5135 if (reachable(src)) { 5136 vmulss(dst, nds, as_Address(src)); 5137 } else { 5138 lea(rscratch1, src); 5139 vmulss(dst, nds, Address(rscratch1, 0)); 5140 } 5141 } 5142 5143 void MacroAssembler::vsubsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { 5144 if (reachable(src)) { 5145 vsubsd(dst, nds, as_Address(src)); 5146 } else { 5147 lea(rscratch1, src); 5148 vsubsd(dst, nds, Address(rscratch1, 0)); 5149 } 5150 } 5151 5152 void MacroAssembler::vsubss(XMMRegister dst, XMMRegister nds, AddressLiteral src) { 5153 if (reachable(src)) { 5154 vsubss(dst, nds, as_Address(src)); 5155 } else { 5156 lea(rscratch1, src); 5157 vsubss(dst, nds, Address(rscratch1, 0)); 5158 } 5159 } 5160 5161 void MacroAssembler::vnegatess(XMMRegister dst, XMMRegister nds, AddressLiteral src) { 5162 int nds_enc = nds->encoding(); 5163 int dst_enc = dst->encoding(); 5164 bool dst_upper_bank = (dst_enc > 15); 5165 bool nds_upper_bank = (nds_enc > 15); 5166 if (VM_Version::supports_avx512novl() && 5167 (nds_upper_bank || dst_upper_bank)) { 5168 if (dst_upper_bank) { 5169 subptr(rsp, 64); 5170 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 5171 movflt(xmm0, nds); 5172 vxorps(xmm0, xmm0, src, Assembler::AVX_128bit); 5173 movflt(dst, xmm0); 5174 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 5175 addptr(rsp, 64); 5176 } else { 5177 movflt(dst, nds); 5178 vxorps(dst, dst, src, Assembler::AVX_128bit); 5179 } 5180 } else { 5181 vxorps(dst, nds, src, Assembler::AVX_128bit); 5182 } 5183 } 5184 5185 void MacroAssembler::vnegatesd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { 5186 int nds_enc = nds->encoding(); 5187 int dst_enc = dst->encoding(); 5188 bool dst_upper_bank = (dst_enc > 15); 5189 bool nds_upper_bank = (nds_enc > 15); 5190 if (VM_Version::supports_avx512novl() && 5191 (nds_upper_bank || dst_upper_bank)) { 5192 if (dst_upper_bank) { 5193 subptr(rsp, 64); 5194 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 5195 movdbl(xmm0, nds); 5196 vxorpd(xmm0, xmm0, src, Assembler::AVX_128bit); 5197 movdbl(dst, xmm0); 5198 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 5199 addptr(rsp, 64); 5200 } else { 5201 movdbl(dst, nds); 5202 vxorpd(dst, dst, src, Assembler::AVX_128bit); 5203 } 5204 } else { 5205 vxorpd(dst, nds, src, Assembler::AVX_128bit); 5206 } 5207 } 5208 5209 void MacroAssembler::vxorpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len) { 5210 if (reachable(src)) { 5211 vxorpd(dst, nds, as_Address(src), vector_len); 5212 } else { 5213 lea(rscratch1, src); 5214 vxorpd(dst, nds, Address(rscratch1, 0), vector_len); 5215 } 5216 } 5217 5218 void MacroAssembler::vxorps(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len) { 5219 if (reachable(src)) { 5220 vxorps(dst, nds, as_Address(src), vector_len); 5221 } else { 5222 lea(rscratch1, src); 5223 vxorps(dst, nds, Address(rscratch1, 0), vector_len); 5224 } 5225 } 5226 5227 void MacroAssembler::clear_jweak_tag(Register possibly_jweak) { 5228 const int32_t inverted_jweak_mask = ~static_cast<int32_t>(JNIHandles::weak_tag_mask); 5229 STATIC_ASSERT(inverted_jweak_mask == -2); // otherwise check this code 5230 // The inverted mask is sign-extended 5231 andptr(possibly_jweak, inverted_jweak_mask); 5232 } 5233 5234 void MacroAssembler::resolve_jobject(Register value, 5235 Register thread, 5236 Register tmp) { 5237 assert_different_registers(value, thread, tmp); 5238 Label done, not_weak; 5239 testptr(value, value); 5240 jcc(Assembler::zero, done); // Use NULL as-is. 5241 testptr(value, JNIHandles::weak_tag_mask); // Test for jweak tag. 5242 jcc(Assembler::zero, not_weak); 5243 // Resolve jweak. 5244 access_load_at(T_OBJECT, IN_NATIVE | ON_PHANTOM_OOP_REF, 5245 value, Address(value, -JNIHandles::weak_tag_value), tmp, thread); 5246 verify_oop(value); 5247 jmp(done); 5248 bind(not_weak); 5249 // Resolve (untagged) jobject. 5250 access_load_at(T_OBJECT, IN_NATIVE, value, Address(value, 0), tmp, thread); 5251 verify_oop(value); 5252 bind(done); 5253 } 5254 5255 void MacroAssembler::subptr(Register dst, int32_t imm32) { 5256 LP64_ONLY(subq(dst, imm32)) NOT_LP64(subl(dst, imm32)); 5257 } 5258 5259 // Force generation of a 4 byte immediate value even if it fits into 8bit 5260 void MacroAssembler::subptr_imm32(Register dst, int32_t imm32) { 5261 LP64_ONLY(subq_imm32(dst, imm32)) NOT_LP64(subl_imm32(dst, imm32)); 5262 } 5263 5264 void MacroAssembler::subptr(Register dst, Register src) { 5265 LP64_ONLY(subq(dst, src)) NOT_LP64(subl(dst, src)); 5266 } 5267 5268 // C++ bool manipulation 5269 void MacroAssembler::testbool(Register dst) { 5270 if(sizeof(bool) == 1) 5271 testb(dst, 0xff); 5272 else if(sizeof(bool) == 2) { 5273 // testw implementation needed for two byte bools 5274 ShouldNotReachHere(); 5275 } else if(sizeof(bool) == 4) 5276 testl(dst, dst); 5277 else 5278 // unsupported 5279 ShouldNotReachHere(); 5280 } 5281 5282 void MacroAssembler::testptr(Register dst, Register src) { 5283 LP64_ONLY(testq(dst, src)) NOT_LP64(testl(dst, src)); 5284 } 5285 5286 // Defines obj, preserves var_size_in_bytes, okay for t2 == var_size_in_bytes. 5287 void MacroAssembler::tlab_allocate(Register thread, Register obj, 5288 Register var_size_in_bytes, 5289 int con_size_in_bytes, 5290 Register t1, 5291 Register t2, 5292 Label& slow_case) { 5293 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler(); 5294 bs->tlab_allocate(this, thread, obj, var_size_in_bytes, con_size_in_bytes, t1, t2, slow_case); 5295 } 5296 5297 // Defines obj, preserves var_size_in_bytes 5298 void MacroAssembler::eden_allocate(Register thread, Register obj, 5299 Register var_size_in_bytes, 5300 int con_size_in_bytes, 5301 Register t1, 5302 Label& slow_case) { 5303 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler(); 5304 bs->eden_allocate(this, thread, obj, var_size_in_bytes, con_size_in_bytes, t1, slow_case); 5305 } 5306 5307 // Preserves the contents of address, destroys the contents length_in_bytes and temp. 5308 void MacroAssembler::zero_memory(Register address, Register length_in_bytes, int offset_in_bytes, Register temp) { 5309 assert(address != length_in_bytes && address != temp && temp != length_in_bytes, "registers must be different"); 5310 assert((offset_in_bytes & (BytesPerWord - 1)) == 0, "offset must be a multiple of BytesPerWord"); 5311 Label done; 5312 5313 testptr(length_in_bytes, length_in_bytes); 5314 jcc(Assembler::zero, done); 5315 5316 // initialize topmost word, divide index by 2, check if odd and test if zero 5317 // note: for the remaining code to work, index must be a multiple of BytesPerWord 5318 #ifdef ASSERT 5319 { 5320 Label L; 5321 testptr(length_in_bytes, BytesPerWord - 1); 5322 jcc(Assembler::zero, L); 5323 stop("length must be a multiple of BytesPerWord"); 5324 bind(L); 5325 } 5326 #endif 5327 Register index = length_in_bytes; 5328 xorptr(temp, temp); // use _zero reg to clear memory (shorter code) 5329 if (UseIncDec) { 5330 shrptr(index, 3); // divide by 8/16 and set carry flag if bit 2 was set 5331 } else { 5332 shrptr(index, 2); // use 2 instructions to avoid partial flag stall 5333 shrptr(index, 1); 5334 } 5335 #ifndef _LP64 5336 // index could have not been a multiple of 8 (i.e., bit 2 was set) 5337 { 5338 Label even; 5339 // note: if index was a multiple of 8, then it cannot 5340 // be 0 now otherwise it must have been 0 before 5341 // => if it is even, we don't need to check for 0 again 5342 jcc(Assembler::carryClear, even); 5343 // clear topmost word (no jump would be needed if conditional assignment worked here) 5344 movptr(Address(address, index, Address::times_8, offset_in_bytes - 0*BytesPerWord), temp); 5345 // index could be 0 now, must check again 5346 jcc(Assembler::zero, done); 5347 bind(even); 5348 } 5349 #endif // !_LP64 5350 // initialize remaining object fields: index is a multiple of 2 now 5351 { 5352 Label loop; 5353 bind(loop); 5354 movptr(Address(address, index, Address::times_8, offset_in_bytes - 1*BytesPerWord), temp); 5355 NOT_LP64(movptr(Address(address, index, Address::times_8, offset_in_bytes - 2*BytesPerWord), temp);) 5356 decrement(index); 5357 jcc(Assembler::notZero, loop); 5358 } 5359 5360 bind(done); 5361 } 5362 5363 // Look up the method for a megamorphic invokeinterface call. 5364 // The target method is determined by <intf_klass, itable_index>. 5365 // The receiver klass is in recv_klass. 5366 // On success, the result will be in method_result, and execution falls through. 5367 // On failure, execution transfers to the given label. 5368 void MacroAssembler::lookup_interface_method(Register recv_klass, 5369 Register intf_klass, 5370 RegisterOrConstant itable_index, 5371 Register method_result, 5372 Register scan_temp, 5373 Label& L_no_such_interface, 5374 bool return_method) { 5375 assert_different_registers(recv_klass, intf_klass, scan_temp); 5376 assert_different_registers(method_result, intf_klass, scan_temp); 5377 assert(recv_klass != method_result || !return_method, 5378 "recv_klass can be destroyed when method isn't needed"); 5379 5380 assert(itable_index.is_constant() || itable_index.as_register() == method_result, 5381 "caller must use same register for non-constant itable index as for method"); 5382 5383 // Compute start of first itableOffsetEntry (which is at the end of the vtable) 5384 int vtable_base = in_bytes(Klass::vtable_start_offset()); 5385 int itentry_off = itableMethodEntry::method_offset_in_bytes(); 5386 int scan_step = itableOffsetEntry::size() * wordSize; 5387 int vte_size = vtableEntry::size_in_bytes(); 5388 Address::ScaleFactor times_vte_scale = Address::times_ptr; 5389 assert(vte_size == wordSize, "else adjust times_vte_scale"); 5390 5391 movl(scan_temp, Address(recv_klass, Klass::vtable_length_offset())); 5392 5393 // %%% Could store the aligned, prescaled offset in the klassoop. 5394 lea(scan_temp, Address(recv_klass, scan_temp, times_vte_scale, vtable_base)); 5395 5396 if (return_method) { 5397 // Adjust recv_klass by scaled itable_index, so we can free itable_index. 5398 assert(itableMethodEntry::size() * wordSize == wordSize, "adjust the scaling in the code below"); 5399 lea(recv_klass, Address(recv_klass, itable_index, Address::times_ptr, itentry_off)); 5400 } 5401 5402 // for (scan = klass->itable(); scan->interface() != NULL; scan += scan_step) { 5403 // if (scan->interface() == intf) { 5404 // result = (klass + scan->offset() + itable_index); 5405 // } 5406 // } 5407 Label search, found_method; 5408 5409 for (int peel = 1; peel >= 0; peel--) { 5410 movptr(method_result, Address(scan_temp, itableOffsetEntry::interface_offset_in_bytes())); 5411 cmpptr(intf_klass, method_result); 5412 5413 if (peel) { 5414 jccb(Assembler::equal, found_method); 5415 } else { 5416 jccb(Assembler::notEqual, search); 5417 // (invert the test to fall through to found_method...) 5418 } 5419 5420 if (!peel) break; 5421 5422 bind(search); 5423 5424 // Check that the previous entry is non-null. A null entry means that 5425 // the receiver class doesn't implement the interface, and wasn't the 5426 // same as when the caller was compiled. 5427 testptr(method_result, method_result); 5428 jcc(Assembler::zero, L_no_such_interface); 5429 addptr(scan_temp, scan_step); 5430 } 5431 5432 bind(found_method); 5433 5434 if (return_method) { 5435 // Got a hit. 5436 movl(scan_temp, Address(scan_temp, itableOffsetEntry::offset_offset_in_bytes())); 5437 movptr(method_result, Address(recv_klass, scan_temp, Address::times_1)); 5438 } 5439 } 5440 5441 5442 // virtual method calling 5443 void MacroAssembler::lookup_virtual_method(Register recv_klass, 5444 RegisterOrConstant vtable_index, 5445 Register method_result) { 5446 const int base = in_bytes(Klass::vtable_start_offset()); 5447 assert(vtableEntry::size() * wordSize == wordSize, "else adjust the scaling in the code below"); 5448 Address vtable_entry_addr(recv_klass, 5449 vtable_index, Address::times_ptr, 5450 base + vtableEntry::method_offset_in_bytes()); 5451 movptr(method_result, vtable_entry_addr); 5452 } 5453 5454 5455 void MacroAssembler::check_klass_subtype(Register sub_klass, 5456 Register super_klass, 5457 Register temp_reg, 5458 Label& L_success) { 5459 Label L_failure; 5460 check_klass_subtype_fast_path(sub_klass, super_klass, temp_reg, &L_success, &L_failure, NULL); 5461 check_klass_subtype_slow_path(sub_klass, super_klass, temp_reg, noreg, &L_success, NULL); 5462 bind(L_failure); 5463 } 5464 5465 5466 void MacroAssembler::check_klass_subtype_fast_path(Register sub_klass, 5467 Register super_klass, 5468 Register temp_reg, 5469 Label* L_success, 5470 Label* L_failure, 5471 Label* L_slow_path, 5472 RegisterOrConstant super_check_offset) { 5473 assert_different_registers(sub_klass, super_klass, temp_reg); 5474 bool must_load_sco = (super_check_offset.constant_or_zero() == -1); 5475 if (super_check_offset.is_register()) { 5476 assert_different_registers(sub_klass, super_klass, 5477 super_check_offset.as_register()); 5478 } else if (must_load_sco) { 5479 assert(temp_reg != noreg, "supply either a temp or a register offset"); 5480 } 5481 5482 Label L_fallthrough; 5483 int label_nulls = 0; 5484 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; } 5485 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; } 5486 if (L_slow_path == NULL) { L_slow_path = &L_fallthrough; label_nulls++; } 5487 assert(label_nulls <= 1, "at most one NULL in the batch"); 5488 5489 int sc_offset = in_bytes(Klass::secondary_super_cache_offset()); 5490 int sco_offset = in_bytes(Klass::super_check_offset_offset()); 5491 Address super_check_offset_addr(super_klass, sco_offset); 5492 5493 // Hacked jcc, which "knows" that L_fallthrough, at least, is in 5494 // range of a jccb. If this routine grows larger, reconsider at 5495 // least some of these. 5496 #define local_jcc(assembler_cond, label) \ 5497 if (&(label) == &L_fallthrough) jccb(assembler_cond, label); \ 5498 else jcc( assembler_cond, label) /*omit semi*/ 5499 5500 // Hacked jmp, which may only be used just before L_fallthrough. 5501 #define final_jmp(label) \ 5502 if (&(label) == &L_fallthrough) { /*do nothing*/ } \ 5503 else jmp(label) /*omit semi*/ 5504 5505 // If the pointers are equal, we are done (e.g., String[] elements). 5506 // This self-check enables sharing of secondary supertype arrays among 5507 // non-primary types such as array-of-interface. Otherwise, each such 5508 // type would need its own customized SSA. 5509 // We move this check to the front of the fast path because many 5510 // type checks are in fact trivially successful in this manner, 5511 // so we get a nicely predicted branch right at the start of the check. 5512 cmpptr(sub_klass, super_klass); 5513 local_jcc(Assembler::equal, *L_success); 5514 5515 // Check the supertype display: 5516 if (must_load_sco) { 5517 // Positive movl does right thing on LP64. 5518 movl(temp_reg, super_check_offset_addr); 5519 super_check_offset = RegisterOrConstant(temp_reg); 5520 } 5521 Address super_check_addr(sub_klass, super_check_offset, Address::times_1, 0); 5522 cmpptr(super_klass, super_check_addr); // load displayed supertype 5523 5524 // This check has worked decisively for primary supers. 5525 // Secondary supers are sought in the super_cache ('super_cache_addr'). 5526 // (Secondary supers are interfaces and very deeply nested subtypes.) 5527 // This works in the same check above because of a tricky aliasing 5528 // between the super_cache and the primary super display elements. 5529 // (The 'super_check_addr' can address either, as the case requires.) 5530 // Note that the cache is updated below if it does not help us find 5531 // what we need immediately. 5532 // So if it was a primary super, we can just fail immediately. 5533 // Otherwise, it's the slow path for us (no success at this point). 5534 5535 if (super_check_offset.is_register()) { 5536 local_jcc(Assembler::equal, *L_success); 5537 cmpl(super_check_offset.as_register(), sc_offset); 5538 if (L_failure == &L_fallthrough) { 5539 local_jcc(Assembler::equal, *L_slow_path); 5540 } else { 5541 local_jcc(Assembler::notEqual, *L_failure); 5542 final_jmp(*L_slow_path); 5543 } 5544 } else if (super_check_offset.as_constant() == sc_offset) { 5545 // Need a slow path; fast failure is impossible. 5546 if (L_slow_path == &L_fallthrough) { 5547 local_jcc(Assembler::equal, *L_success); 5548 } else { 5549 local_jcc(Assembler::notEqual, *L_slow_path); 5550 final_jmp(*L_success); 5551 } 5552 } else { 5553 // No slow path; it's a fast decision. 5554 if (L_failure == &L_fallthrough) { 5555 local_jcc(Assembler::equal, *L_success); 5556 } else { 5557 local_jcc(Assembler::notEqual, *L_failure); 5558 final_jmp(*L_success); 5559 } 5560 } 5561 5562 bind(L_fallthrough); 5563 5564 #undef local_jcc 5565 #undef final_jmp 5566 } 5567 5568 5569 void MacroAssembler::check_klass_subtype_slow_path(Register sub_klass, 5570 Register super_klass, 5571 Register temp_reg, 5572 Register temp2_reg, 5573 Label* L_success, 5574 Label* L_failure, 5575 bool set_cond_codes) { 5576 assert_different_registers(sub_klass, super_klass, temp_reg); 5577 if (temp2_reg != noreg) 5578 assert_different_registers(sub_klass, super_klass, temp_reg, temp2_reg); 5579 #define IS_A_TEMP(reg) ((reg) == temp_reg || (reg) == temp2_reg) 5580 5581 Label L_fallthrough; 5582 int label_nulls = 0; 5583 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; } 5584 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; } 5585 assert(label_nulls <= 1, "at most one NULL in the batch"); 5586 5587 // a couple of useful fields in sub_klass: 5588 int ss_offset = in_bytes(Klass::secondary_supers_offset()); 5589 int sc_offset = in_bytes(Klass::secondary_super_cache_offset()); 5590 Address secondary_supers_addr(sub_klass, ss_offset); 5591 Address super_cache_addr( sub_klass, sc_offset); 5592 5593 // Do a linear scan of the secondary super-klass chain. 5594 // This code is rarely used, so simplicity is a virtue here. 5595 // The repne_scan instruction uses fixed registers, which we must spill. 5596 // Don't worry too much about pre-existing connections with the input regs. 5597 5598 assert(sub_klass != rax, "killed reg"); // killed by mov(rax, super) 5599 assert(sub_klass != rcx, "killed reg"); // killed by lea(rcx, &pst_counter) 5600 5601 // Get super_klass value into rax (even if it was in rdi or rcx). 5602 bool pushed_rax = false, pushed_rcx = false, pushed_rdi = false; 5603 if (super_klass != rax || UseCompressedOops) { 5604 if (!IS_A_TEMP(rax)) { push(rax); pushed_rax = true; } 5605 mov(rax, super_klass); 5606 } 5607 if (!IS_A_TEMP(rcx)) { push(rcx); pushed_rcx = true; } 5608 if (!IS_A_TEMP(rdi)) { push(rdi); pushed_rdi = true; } 5609 5610 #ifndef PRODUCT 5611 int* pst_counter = &SharedRuntime::_partial_subtype_ctr; 5612 ExternalAddress pst_counter_addr((address) pst_counter); 5613 NOT_LP64( incrementl(pst_counter_addr) ); 5614 LP64_ONLY( lea(rcx, pst_counter_addr) ); 5615 LP64_ONLY( incrementl(Address(rcx, 0)) ); 5616 #endif //PRODUCT 5617 5618 // We will consult the secondary-super array. 5619 movptr(rdi, secondary_supers_addr); 5620 // Load the array length. (Positive movl does right thing on LP64.) 5621 movl(rcx, Address(rdi, Array<Klass*>::length_offset_in_bytes())); 5622 // Skip to start of data. 5623 addptr(rdi, Array<Klass*>::base_offset_in_bytes()); 5624 5625 // Scan RCX words at [RDI] for an occurrence of RAX. 5626 // Set NZ/Z based on last compare. 5627 // Z flag value will not be set by 'repne' if RCX == 0 since 'repne' does 5628 // not change flags (only scas instruction which is repeated sets flags). 5629 // Set Z = 0 (not equal) before 'repne' to indicate that class was not found. 5630 5631 testptr(rax,rax); // Set Z = 0 5632 repne_scan(); 5633 5634 // Unspill the temp. registers: 5635 if (pushed_rdi) pop(rdi); 5636 if (pushed_rcx) pop(rcx); 5637 if (pushed_rax) pop(rax); 5638 5639 if (set_cond_codes) { 5640 // Special hack for the AD files: rdi is guaranteed non-zero. 5641 assert(!pushed_rdi, "rdi must be left non-NULL"); 5642 // Also, the condition codes are properly set Z/NZ on succeed/failure. 5643 } 5644 5645 if (L_failure == &L_fallthrough) 5646 jccb(Assembler::notEqual, *L_failure); 5647 else jcc(Assembler::notEqual, *L_failure); 5648 5649 // Success. Cache the super we found and proceed in triumph. 5650 movptr(super_cache_addr, super_klass); 5651 5652 if (L_success != &L_fallthrough) { 5653 jmp(*L_success); 5654 } 5655 5656 #undef IS_A_TEMP 5657 5658 bind(L_fallthrough); 5659 } 5660 5661 5662 void MacroAssembler::cmov32(Condition cc, Register dst, Address src) { 5663 if (VM_Version::supports_cmov()) { 5664 cmovl(cc, dst, src); 5665 } else { 5666 Label L; 5667 jccb(negate_condition(cc), L); 5668 movl(dst, src); 5669 bind(L); 5670 } 5671 } 5672 5673 void MacroAssembler::cmov32(Condition cc, Register dst, Register src) { 5674 if (VM_Version::supports_cmov()) { 5675 cmovl(cc, dst, src); 5676 } else { 5677 Label L; 5678 jccb(negate_condition(cc), L); 5679 movl(dst, src); 5680 bind(L); 5681 } 5682 } 5683 5684 void MacroAssembler::verify_oop(Register reg, const char* s) { 5685 if (!VerifyOops) return; 5686 5687 // Pass register number to verify_oop_subroutine 5688 const char* b = NULL; 5689 { 5690 ResourceMark rm; 5691 stringStream ss; 5692 ss.print("verify_oop: %s: %s", reg->name(), s); 5693 b = code_string(ss.as_string()); 5694 } 5695 BLOCK_COMMENT("verify_oop {"); 5696 #ifdef _LP64 5697 push(rscratch1); // save r10, trashed by movptr() 5698 #endif 5699 push(rax); // save rax, 5700 push(reg); // pass register argument 5701 ExternalAddress buffer((address) b); 5702 // avoid using pushptr, as it modifies scratch registers 5703 // and our contract is not to modify anything 5704 movptr(rax, buffer.addr()); 5705 push(rax); 5706 // call indirectly to solve generation ordering problem 5707 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address())); 5708 call(rax); 5709 // Caller pops the arguments (oop, message) and restores rax, r10 5710 BLOCK_COMMENT("} verify_oop"); 5711 } 5712 5713 5714 RegisterOrConstant MacroAssembler::delayed_value_impl(intptr_t* delayed_value_addr, 5715 Register tmp, 5716 int offset) { 5717 intptr_t value = *delayed_value_addr; 5718 if (value != 0) 5719 return RegisterOrConstant(value + offset); 5720 5721 // load indirectly to solve generation ordering problem 5722 movptr(tmp, ExternalAddress((address) delayed_value_addr)); 5723 5724 #ifdef ASSERT 5725 { Label L; 5726 testptr(tmp, tmp); 5727 if (WizardMode) { 5728 const char* buf = NULL; 5729 { 5730 ResourceMark rm; 5731 stringStream ss; 5732 ss.print("DelayedValue=" INTPTR_FORMAT, delayed_value_addr[1]); 5733 buf = code_string(ss.as_string()); 5734 } 5735 jcc(Assembler::notZero, L); 5736 STOP(buf); 5737 } else { 5738 jccb(Assembler::notZero, L); 5739 hlt(); 5740 } 5741 bind(L); 5742 } 5743 #endif 5744 5745 if (offset != 0) 5746 addptr(tmp, offset); 5747 5748 return RegisterOrConstant(tmp); 5749 } 5750 5751 5752 Address MacroAssembler::argument_address(RegisterOrConstant arg_slot, 5753 int extra_slot_offset) { 5754 // cf. TemplateTable::prepare_invoke(), if (load_receiver). 5755 int stackElementSize = Interpreter::stackElementSize; 5756 int offset = Interpreter::expr_offset_in_bytes(extra_slot_offset+0); 5757 #ifdef ASSERT 5758 int offset1 = Interpreter::expr_offset_in_bytes(extra_slot_offset+1); 5759 assert(offset1 - offset == stackElementSize, "correct arithmetic"); 5760 #endif 5761 Register scale_reg = noreg; 5762 Address::ScaleFactor scale_factor = Address::no_scale; 5763 if (arg_slot.is_constant()) { 5764 offset += arg_slot.as_constant() * stackElementSize; 5765 } else { 5766 scale_reg = arg_slot.as_register(); 5767 scale_factor = Address::times(stackElementSize); 5768 } 5769 offset += wordSize; // return PC is on stack 5770 return Address(rsp, scale_reg, scale_factor, offset); 5771 } 5772 5773 5774 void MacroAssembler::verify_oop_addr(Address addr, const char* s) { 5775 if (!VerifyOops) return; 5776 5777 // Address adjust(addr.base(), addr.index(), addr.scale(), addr.disp() + BytesPerWord); 5778 // Pass register number to verify_oop_subroutine 5779 const char* b = NULL; 5780 { 5781 ResourceMark rm; 5782 stringStream ss; 5783 ss.print("verify_oop_addr: %s", s); 5784 b = code_string(ss.as_string()); 5785 } 5786 #ifdef _LP64 5787 push(rscratch1); // save r10, trashed by movptr() 5788 #endif 5789 push(rax); // save rax, 5790 // addr may contain rsp so we will have to adjust it based on the push 5791 // we just did (and on 64 bit we do two pushes) 5792 // NOTE: 64bit seemed to have had a bug in that it did movq(addr, rax); which 5793 // stores rax into addr which is backwards of what was intended. 5794 if (addr.uses(rsp)) { 5795 lea(rax, addr); 5796 pushptr(Address(rax, LP64_ONLY(2 *) BytesPerWord)); 5797 } else { 5798 pushptr(addr); 5799 } 5800 5801 ExternalAddress buffer((address) b); 5802 // pass msg argument 5803 // avoid using pushptr, as it modifies scratch registers 5804 // and our contract is not to modify anything 5805 movptr(rax, buffer.addr()); 5806 push(rax); 5807 5808 // call indirectly to solve generation ordering problem 5809 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address())); 5810 call(rax); 5811 // Caller pops the arguments (addr, message) and restores rax, r10. 5812 } 5813 5814 void MacroAssembler::verify_tlab() { 5815 #ifdef ASSERT 5816 if (UseTLAB && VerifyOops) { 5817 Label next, ok; 5818 Register t1 = rsi; 5819 Register thread_reg = NOT_LP64(rbx) LP64_ONLY(r15_thread); 5820 5821 push(t1); 5822 NOT_LP64(push(thread_reg)); 5823 NOT_LP64(get_thread(thread_reg)); 5824 5825 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset()))); 5826 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_start_offset()))); 5827 jcc(Assembler::aboveEqual, next); 5828 STOP("assert(top >= start)"); 5829 should_not_reach_here(); 5830 5831 bind(next); 5832 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_end_offset()))); 5833 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset()))); 5834 jcc(Assembler::aboveEqual, ok); 5835 STOP("assert(top <= end)"); 5836 should_not_reach_here(); 5837 5838 bind(ok); 5839 NOT_LP64(pop(thread_reg)); 5840 pop(t1); 5841 } 5842 #endif 5843 } 5844 5845 class ControlWord { 5846 public: 5847 int32_t _value; 5848 5849 int rounding_control() const { return (_value >> 10) & 3 ; } 5850 int precision_control() const { return (_value >> 8) & 3 ; } 5851 bool precision() const { return ((_value >> 5) & 1) != 0; } 5852 bool underflow() const { return ((_value >> 4) & 1) != 0; } 5853 bool overflow() const { return ((_value >> 3) & 1) != 0; } 5854 bool zero_divide() const { return ((_value >> 2) & 1) != 0; } 5855 bool denormalized() const { return ((_value >> 1) & 1) != 0; } 5856 bool invalid() const { return ((_value >> 0) & 1) != 0; } 5857 5858 void print() const { 5859 // rounding control 5860 const char* rc; 5861 switch (rounding_control()) { 5862 case 0: rc = "round near"; break; 5863 case 1: rc = "round down"; break; 5864 case 2: rc = "round up "; break; 5865 case 3: rc = "chop "; break; 5866 }; 5867 // precision control 5868 const char* pc; 5869 switch (precision_control()) { 5870 case 0: pc = "24 bits "; break; 5871 case 1: pc = "reserved"; break; 5872 case 2: pc = "53 bits "; break; 5873 case 3: pc = "64 bits "; break; 5874 }; 5875 // flags 5876 char f[9]; 5877 f[0] = ' '; 5878 f[1] = ' '; 5879 f[2] = (precision ()) ? 'P' : 'p'; 5880 f[3] = (underflow ()) ? 'U' : 'u'; 5881 f[4] = (overflow ()) ? 'O' : 'o'; 5882 f[5] = (zero_divide ()) ? 'Z' : 'z'; 5883 f[6] = (denormalized()) ? 'D' : 'd'; 5884 f[7] = (invalid ()) ? 'I' : 'i'; 5885 f[8] = '\x0'; 5886 // output 5887 printf("%04x masks = %s, %s, %s", _value & 0xFFFF, f, rc, pc); 5888 } 5889 5890 }; 5891 5892 class StatusWord { 5893 public: 5894 int32_t _value; 5895 5896 bool busy() const { return ((_value >> 15) & 1) != 0; } 5897 bool C3() const { return ((_value >> 14) & 1) != 0; } 5898 bool C2() const { return ((_value >> 10) & 1) != 0; } 5899 bool C1() const { return ((_value >> 9) & 1) != 0; } 5900 bool C0() const { return ((_value >> 8) & 1) != 0; } 5901 int top() const { return (_value >> 11) & 7 ; } 5902 bool error_status() const { return ((_value >> 7) & 1) != 0; } 5903 bool stack_fault() const { return ((_value >> 6) & 1) != 0; } 5904 bool precision() const { return ((_value >> 5) & 1) != 0; } 5905 bool underflow() const { return ((_value >> 4) & 1) != 0; } 5906 bool overflow() const { return ((_value >> 3) & 1) != 0; } 5907 bool zero_divide() const { return ((_value >> 2) & 1) != 0; } 5908 bool denormalized() const { return ((_value >> 1) & 1) != 0; } 5909 bool invalid() const { return ((_value >> 0) & 1) != 0; } 5910 5911 void print() const { 5912 // condition codes 5913 char c[5]; 5914 c[0] = (C3()) ? '3' : '-'; 5915 c[1] = (C2()) ? '2' : '-'; 5916 c[2] = (C1()) ? '1' : '-'; 5917 c[3] = (C0()) ? '0' : '-'; 5918 c[4] = '\x0'; 5919 // flags 5920 char f[9]; 5921 f[0] = (error_status()) ? 'E' : '-'; 5922 f[1] = (stack_fault ()) ? 'S' : '-'; 5923 f[2] = (precision ()) ? 'P' : '-'; 5924 f[3] = (underflow ()) ? 'U' : '-'; 5925 f[4] = (overflow ()) ? 'O' : '-'; 5926 f[5] = (zero_divide ()) ? 'Z' : '-'; 5927 f[6] = (denormalized()) ? 'D' : '-'; 5928 f[7] = (invalid ()) ? 'I' : '-'; 5929 f[8] = '\x0'; 5930 // output 5931 printf("%04x flags = %s, cc = %s, top = %d", _value & 0xFFFF, f, c, top()); 5932 } 5933 5934 }; 5935 5936 class TagWord { 5937 public: 5938 int32_t _value; 5939 5940 int tag_at(int i) const { return (_value >> (i*2)) & 3; } 5941 5942 void print() const { 5943 printf("%04x", _value & 0xFFFF); 5944 } 5945 5946 }; 5947 5948 class FPU_Register { 5949 public: 5950 int32_t _m0; 5951 int32_t _m1; 5952 int16_t _ex; 5953 5954 bool is_indefinite() const { 5955 return _ex == -1 && _m1 == (int32_t)0xC0000000 && _m0 == 0; 5956 } 5957 5958 void print() const { 5959 char sign = (_ex < 0) ? '-' : '+'; 5960 const char* kind = (_ex == 0x7FFF || _ex == (int16_t)-1) ? "NaN" : " "; 5961 printf("%c%04hx.%08x%08x %s", sign, _ex, _m1, _m0, kind); 5962 }; 5963 5964 }; 5965 5966 class FPU_State { 5967 public: 5968 enum { 5969 register_size = 10, 5970 number_of_registers = 8, 5971 register_mask = 7 5972 }; 5973 5974 ControlWord _control_word; 5975 StatusWord _status_word; 5976 TagWord _tag_word; 5977 int32_t _error_offset; 5978 int32_t _error_selector; 5979 int32_t _data_offset; 5980 int32_t _data_selector; 5981 int8_t _register[register_size * number_of_registers]; 5982 5983 int tag_for_st(int i) const { return _tag_word.tag_at((_status_word.top() + i) & register_mask); } 5984 FPU_Register* st(int i) const { return (FPU_Register*)&_register[register_size * i]; } 5985 5986 const char* tag_as_string(int tag) const { 5987 switch (tag) { 5988 case 0: return "valid"; 5989 case 1: return "zero"; 5990 case 2: return "special"; 5991 case 3: return "empty"; 5992 } 5993 ShouldNotReachHere(); 5994 return NULL; 5995 } 5996 5997 void print() const { 5998 // print computation registers 5999 { int t = _status_word.top(); 6000 for (int i = 0; i < number_of_registers; i++) { 6001 int j = (i - t) & register_mask; 6002 printf("%c r%d = ST%d = ", (j == 0 ? '*' : ' '), i, j); 6003 st(j)->print(); 6004 printf(" %s\n", tag_as_string(_tag_word.tag_at(i))); 6005 } 6006 } 6007 printf("\n"); 6008 // print control registers 6009 printf("ctrl = "); _control_word.print(); printf("\n"); 6010 printf("stat = "); _status_word .print(); printf("\n"); 6011 printf("tags = "); _tag_word .print(); printf("\n"); 6012 } 6013 6014 }; 6015 6016 class Flag_Register { 6017 public: 6018 int32_t _value; 6019 6020 bool overflow() const { return ((_value >> 11) & 1) != 0; } 6021 bool direction() const { return ((_value >> 10) & 1) != 0; } 6022 bool sign() const { return ((_value >> 7) & 1) != 0; } 6023 bool zero() const { return ((_value >> 6) & 1) != 0; } 6024 bool auxiliary_carry() const { return ((_value >> 4) & 1) != 0; } 6025 bool parity() const { return ((_value >> 2) & 1) != 0; } 6026 bool carry() const { return ((_value >> 0) & 1) != 0; } 6027 6028 void print() const { 6029 // flags 6030 char f[8]; 6031 f[0] = (overflow ()) ? 'O' : '-'; 6032 f[1] = (direction ()) ? 'D' : '-'; 6033 f[2] = (sign ()) ? 'S' : '-'; 6034 f[3] = (zero ()) ? 'Z' : '-'; 6035 f[4] = (auxiliary_carry()) ? 'A' : '-'; 6036 f[5] = (parity ()) ? 'P' : '-'; 6037 f[6] = (carry ()) ? 'C' : '-'; 6038 f[7] = '\x0'; 6039 // output 6040 printf("%08x flags = %s", _value, f); 6041 } 6042 6043 }; 6044 6045 class IU_Register { 6046 public: 6047 int32_t _value; 6048 6049 void print() const { 6050 printf("%08x %11d", _value, _value); 6051 } 6052 6053 }; 6054 6055 class IU_State { 6056 public: 6057 Flag_Register _eflags; 6058 IU_Register _rdi; 6059 IU_Register _rsi; 6060 IU_Register _rbp; 6061 IU_Register _rsp; 6062 IU_Register _rbx; 6063 IU_Register _rdx; 6064 IU_Register _rcx; 6065 IU_Register _rax; 6066 6067 void print() const { 6068 // computation registers 6069 printf("rax, = "); _rax.print(); printf("\n"); 6070 printf("rbx, = "); _rbx.print(); printf("\n"); 6071 printf("rcx = "); _rcx.print(); printf("\n"); 6072 printf("rdx = "); _rdx.print(); printf("\n"); 6073 printf("rdi = "); _rdi.print(); printf("\n"); 6074 printf("rsi = "); _rsi.print(); printf("\n"); 6075 printf("rbp, = "); _rbp.print(); printf("\n"); 6076 printf("rsp = "); _rsp.print(); printf("\n"); 6077 printf("\n"); 6078 // control registers 6079 printf("flgs = "); _eflags.print(); printf("\n"); 6080 } 6081 }; 6082 6083 6084 class CPU_State { 6085 public: 6086 FPU_State _fpu_state; 6087 IU_State _iu_state; 6088 6089 void print() const { 6090 printf("--------------------------------------------------\n"); 6091 _iu_state .print(); 6092 printf("\n"); 6093 _fpu_state.print(); 6094 printf("--------------------------------------------------\n"); 6095 } 6096 6097 }; 6098 6099 6100 static void _print_CPU_state(CPU_State* state) { 6101 state->print(); 6102 }; 6103 6104 6105 void MacroAssembler::print_CPU_state() { 6106 push_CPU_state(); 6107 push(rsp); // pass CPU state 6108 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _print_CPU_state))); 6109 addptr(rsp, wordSize); // discard argument 6110 pop_CPU_state(); 6111 } 6112 6113 6114 static bool _verify_FPU(int stack_depth, char* s, CPU_State* state) { 6115 static int counter = 0; 6116 FPU_State* fs = &state->_fpu_state; 6117 counter++; 6118 // For leaf calls, only verify that the top few elements remain empty. 6119 // We only need 1 empty at the top for C2 code. 6120 if( stack_depth < 0 ) { 6121 if( fs->tag_for_st(7) != 3 ) { 6122 printf("FPR7 not empty\n"); 6123 state->print(); 6124 assert(false, "error"); 6125 return false; 6126 } 6127 return true; // All other stack states do not matter 6128 } 6129 6130 assert((fs->_control_word._value & 0xffff) == StubRoutines::_fpu_cntrl_wrd_std, 6131 "bad FPU control word"); 6132 6133 // compute stack depth 6134 int i = 0; 6135 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) < 3) i++; 6136 int d = i; 6137 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) == 3) i++; 6138 // verify findings 6139 if (i != FPU_State::number_of_registers) { 6140 // stack not contiguous 6141 printf("%s: stack not contiguous at ST%d\n", s, i); 6142 state->print(); 6143 assert(false, "error"); 6144 return false; 6145 } 6146 // check if computed stack depth corresponds to expected stack depth 6147 if (stack_depth < 0) { 6148 // expected stack depth is -stack_depth or less 6149 if (d > -stack_depth) { 6150 // too many elements on the stack 6151 printf("%s: <= %d stack elements expected but found %d\n", s, -stack_depth, d); 6152 state->print(); 6153 assert(false, "error"); 6154 return false; 6155 } 6156 } else { 6157 // expected stack depth is stack_depth 6158 if (d != stack_depth) { 6159 // wrong stack depth 6160 printf("%s: %d stack elements expected but found %d\n", s, stack_depth, d); 6161 state->print(); 6162 assert(false, "error"); 6163 return false; 6164 } 6165 } 6166 // everything is cool 6167 return true; 6168 } 6169 6170 6171 void MacroAssembler::verify_FPU(int stack_depth, const char* s) { 6172 if (!VerifyFPU) return; 6173 push_CPU_state(); 6174 push(rsp); // pass CPU state 6175 ExternalAddress msg((address) s); 6176 // pass message string s 6177 pushptr(msg.addr()); 6178 push(stack_depth); // pass stack depth 6179 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _verify_FPU))); 6180 addptr(rsp, 3 * wordSize); // discard arguments 6181 // check for error 6182 { Label L; 6183 testl(rax, rax); 6184 jcc(Assembler::notZero, L); 6185 int3(); // break if error condition 6186 bind(L); 6187 } 6188 pop_CPU_state(); 6189 } 6190 6191 void MacroAssembler::restore_cpu_control_state_after_jni() { 6192 // Either restore the MXCSR register after returning from the JNI Call 6193 // or verify that it wasn't changed (with -Xcheck:jni flag). 6194 if (VM_Version::supports_sse()) { 6195 if (RestoreMXCSROnJNICalls) { 6196 ldmxcsr(ExternalAddress(StubRoutines::addr_mxcsr_std())); 6197 } else if (CheckJNICalls) { 6198 call(RuntimeAddress(StubRoutines::x86::verify_mxcsr_entry())); 6199 } 6200 } 6201 // Clear upper bits of YMM registers to avoid SSE <-> AVX transition penalty. 6202 vzeroupper(); 6203 // Reset k1 to 0xffff. 6204 if (VM_Version::supports_evex()) { 6205 push(rcx); 6206 movl(rcx, 0xffff); 6207 kmovwl(k1, rcx); 6208 pop(rcx); 6209 } 6210 6211 #ifndef _LP64 6212 // Either restore the x87 floating pointer control word after returning 6213 // from the JNI call or verify that it wasn't changed. 6214 if (CheckJNICalls) { 6215 call(RuntimeAddress(StubRoutines::x86::verify_fpu_cntrl_wrd_entry())); 6216 } 6217 #endif // _LP64 6218 } 6219 6220 // ((OopHandle)result).resolve(); 6221 void MacroAssembler::resolve_oop_handle(Register result, Register tmp) { 6222 assert_different_registers(result, tmp); 6223 6224 // Only 64 bit platforms support GCs that require a tmp register 6225 // Only IN_HEAP loads require a thread_tmp register 6226 // OopHandle::resolve is an indirection like jobject. 6227 access_load_at(T_OBJECT, IN_NATIVE, 6228 result, Address(result, 0), tmp, /*tmp_thread*/noreg); 6229 } 6230 6231 void MacroAssembler::load_mirror(Register mirror, Register method, Register tmp) { 6232 // get mirror 6233 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); 6234 movptr(mirror, Address(method, Method::const_offset())); 6235 movptr(mirror, Address(mirror, ConstMethod::constants_offset())); 6236 movptr(mirror, Address(mirror, ConstantPool::pool_holder_offset_in_bytes())); 6237 movptr(mirror, Address(mirror, mirror_offset)); 6238 resolve_oop_handle(mirror, tmp); 6239 } 6240 6241 void MacroAssembler::load_klass(Register dst, Register src) { 6242 #ifdef _LP64 6243 if (UseCompressedClassPointers) { 6244 movl(dst, Address(src, oopDesc::klass_offset_in_bytes())); 6245 decode_klass_not_null(dst); 6246 } else 6247 #endif 6248 movptr(dst, Address(src, oopDesc::klass_offset_in_bytes())); 6249 } 6250 6251 void MacroAssembler::load_prototype_header(Register dst, Register src) { 6252 load_klass(dst, src); 6253 movptr(dst, Address(dst, Klass::prototype_header_offset())); 6254 } 6255 6256 void MacroAssembler::store_klass(Register dst, Register src) { 6257 #ifdef _LP64 6258 if (UseCompressedClassPointers) { 6259 encode_klass_not_null(src); 6260 movl(Address(dst, oopDesc::klass_offset_in_bytes()), src); 6261 } else 6262 #endif 6263 movptr(Address(dst, oopDesc::klass_offset_in_bytes()), src); 6264 } 6265 6266 void MacroAssembler::access_load_at(BasicType type, DecoratorSet decorators, Register dst, Address src, 6267 Register tmp1, Register thread_tmp) { 6268 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler(); 6269 decorators = AccessInternal::decorator_fixup(decorators); 6270 bool as_raw = (decorators & AS_RAW) != 0; 6271 if (as_raw) { 6272 bs->BarrierSetAssembler::load_at(this, decorators, type, dst, src, tmp1, thread_tmp); 6273 } else { 6274 bs->load_at(this, decorators, type, dst, src, tmp1, thread_tmp); 6275 } 6276 } 6277 6278 void MacroAssembler::access_store_at(BasicType type, DecoratorSet decorators, Address dst, Register src, 6279 Register tmp1, Register tmp2) { 6280 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler(); 6281 decorators = AccessInternal::decorator_fixup(decorators); 6282 bool as_raw = (decorators & AS_RAW) != 0; 6283 if (as_raw) { 6284 bs->BarrierSetAssembler::store_at(this, decorators, type, dst, src, tmp1, tmp2); 6285 } else { 6286 bs->store_at(this, decorators, type, dst, src, tmp1, tmp2); 6287 } 6288 } 6289 6290 void MacroAssembler::resolve(DecoratorSet decorators, Register obj) { 6291 // Use stronger ACCESS_WRITE|ACCESS_READ by default. 6292 if ((decorators & (ACCESS_READ | ACCESS_WRITE)) == 0) { 6293 decorators |= ACCESS_READ | ACCESS_WRITE; 6294 } 6295 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler(); 6296 return bs->resolve(this, decorators, obj); 6297 } 6298 6299 void MacroAssembler::load_heap_oop(Register dst, Address src, Register tmp1, 6300 Register thread_tmp, DecoratorSet decorators) { 6301 access_load_at(T_OBJECT, IN_HEAP | decorators, dst, src, tmp1, thread_tmp); 6302 } 6303 6304 // Doesn't do verfication, generates fixed size code 6305 void MacroAssembler::load_heap_oop_not_null(Register dst, Address src, Register tmp1, 6306 Register thread_tmp, DecoratorSet decorators) { 6307 access_load_at(T_OBJECT, IN_HEAP | IS_NOT_NULL | decorators, dst, src, tmp1, thread_tmp); 6308 } 6309 6310 void MacroAssembler::store_heap_oop(Address dst, Register src, Register tmp1, 6311 Register tmp2, DecoratorSet decorators) { 6312 access_store_at(T_OBJECT, IN_HEAP | decorators, dst, src, tmp1, tmp2); 6313 } 6314 6315 // Used for storing NULLs. 6316 void MacroAssembler::store_heap_oop_null(Address dst) { 6317 access_store_at(T_OBJECT, IN_HEAP, dst, noreg, noreg, noreg); 6318 } 6319 6320 #ifdef _LP64 6321 void MacroAssembler::store_klass_gap(Register dst, Register src) { 6322 if (UseCompressedClassPointers) { 6323 // Store to klass gap in destination 6324 movl(Address(dst, oopDesc::klass_gap_offset_in_bytes()), src); 6325 } 6326 } 6327 6328 #ifdef ASSERT 6329 void MacroAssembler::verify_heapbase(const char* msg) { 6330 assert (UseCompressedOops, "should be compressed"); 6331 assert (Universe::heap() != NULL, "java heap should be initialized"); 6332 if (CheckCompressedOops) { 6333 Label ok; 6334 push(rscratch1); // cmpptr trashes rscratch1 6335 cmpptr(r12_heapbase, ExternalAddress((address)Universe::narrow_ptrs_base_addr())); 6336 jcc(Assembler::equal, ok); 6337 STOP(msg); 6338 bind(ok); 6339 pop(rscratch1); 6340 } 6341 } 6342 #endif 6343 6344 // Algorithm must match oop.inline.hpp encode_heap_oop. 6345 void MacroAssembler::encode_heap_oop(Register r) { 6346 #ifdef ASSERT 6347 verify_heapbase("MacroAssembler::encode_heap_oop: heap base corrupted?"); 6348 #endif 6349 verify_oop(r, "broken oop in encode_heap_oop"); 6350 if (Universe::narrow_oop_base() == NULL) { 6351 if (Universe::narrow_oop_shift() != 0) { 6352 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); 6353 shrq(r, LogMinObjAlignmentInBytes); 6354 } 6355 return; 6356 } 6357 testq(r, r); 6358 cmovq(Assembler::equal, r, r12_heapbase); 6359 subq(r, r12_heapbase); 6360 shrq(r, LogMinObjAlignmentInBytes); 6361 } 6362 6363 void MacroAssembler::encode_heap_oop_not_null(Register r) { 6364 #ifdef ASSERT 6365 verify_heapbase("MacroAssembler::encode_heap_oop_not_null: heap base corrupted?"); 6366 if (CheckCompressedOops) { 6367 Label ok; 6368 testq(r, r); 6369 jcc(Assembler::notEqual, ok); 6370 STOP("null oop passed to encode_heap_oop_not_null"); 6371 bind(ok); 6372 } 6373 #endif 6374 verify_oop(r, "broken oop in encode_heap_oop_not_null"); 6375 if (Universe::narrow_oop_base() != NULL) { 6376 subq(r, r12_heapbase); 6377 } 6378 if (Universe::narrow_oop_shift() != 0) { 6379 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); 6380 shrq(r, LogMinObjAlignmentInBytes); 6381 } 6382 } 6383 6384 void MacroAssembler::encode_heap_oop_not_null(Register dst, Register src) { 6385 #ifdef ASSERT 6386 verify_heapbase("MacroAssembler::encode_heap_oop_not_null2: heap base corrupted?"); 6387 if (CheckCompressedOops) { 6388 Label ok; 6389 testq(src, src); 6390 jcc(Assembler::notEqual, ok); 6391 STOP("null oop passed to encode_heap_oop_not_null2"); 6392 bind(ok); 6393 } 6394 #endif 6395 verify_oop(src, "broken oop in encode_heap_oop_not_null2"); 6396 if (dst != src) { 6397 movq(dst, src); 6398 } 6399 if (Universe::narrow_oop_base() != NULL) { 6400 subq(dst, r12_heapbase); 6401 } 6402 if (Universe::narrow_oop_shift() != 0) { 6403 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); 6404 shrq(dst, LogMinObjAlignmentInBytes); 6405 } 6406 } 6407 6408 void MacroAssembler::decode_heap_oop(Register r) { 6409 #ifdef ASSERT 6410 verify_heapbase("MacroAssembler::decode_heap_oop: heap base corrupted?"); 6411 #endif 6412 if (Universe::narrow_oop_base() == NULL) { 6413 if (Universe::narrow_oop_shift() != 0) { 6414 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); 6415 shlq(r, LogMinObjAlignmentInBytes); 6416 } 6417 } else { 6418 Label done; 6419 shlq(r, LogMinObjAlignmentInBytes); 6420 jccb(Assembler::equal, done); 6421 addq(r, r12_heapbase); 6422 bind(done); 6423 } 6424 verify_oop(r, "broken oop in decode_heap_oop"); 6425 } 6426 6427 void MacroAssembler::decode_heap_oop_not_null(Register r) { 6428 // Note: it will change flags 6429 assert (UseCompressedOops, "should only be used for compressed headers"); 6430 assert (Universe::heap() != NULL, "java heap should be initialized"); 6431 // Cannot assert, unverified entry point counts instructions (see .ad file) 6432 // vtableStubs also counts instructions in pd_code_size_limit. 6433 // Also do not verify_oop as this is called by verify_oop. 6434 if (Universe::narrow_oop_shift() != 0) { 6435 assert(LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); 6436 shlq(r, LogMinObjAlignmentInBytes); 6437 if (Universe::narrow_oop_base() != NULL) { 6438 addq(r, r12_heapbase); 6439 } 6440 } else { 6441 assert (Universe::narrow_oop_base() == NULL, "sanity"); 6442 } 6443 } 6444 6445 void MacroAssembler::decode_heap_oop_not_null(Register dst, Register src) { 6446 // Note: it will change flags 6447 assert (UseCompressedOops, "should only be used for compressed headers"); 6448 assert (Universe::heap() != NULL, "java heap should be initialized"); 6449 // Cannot assert, unverified entry point counts instructions (see .ad file) 6450 // vtableStubs also counts instructions in pd_code_size_limit. 6451 // Also do not verify_oop as this is called by verify_oop. 6452 if (Universe::narrow_oop_shift() != 0) { 6453 assert(LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); 6454 if (LogMinObjAlignmentInBytes == Address::times_8) { 6455 leaq(dst, Address(r12_heapbase, src, Address::times_8, 0)); 6456 } else { 6457 if (dst != src) { 6458 movq(dst, src); 6459 } 6460 shlq(dst, LogMinObjAlignmentInBytes); 6461 if (Universe::narrow_oop_base() != NULL) { 6462 addq(dst, r12_heapbase); 6463 } 6464 } 6465 } else { 6466 assert (Universe::narrow_oop_base() == NULL, "sanity"); 6467 if (dst != src) { 6468 movq(dst, src); 6469 } 6470 } 6471 } 6472 6473 void MacroAssembler::encode_klass_not_null(Register r) { 6474 if (Universe::narrow_klass_base() != NULL) { 6475 // Use r12 as a scratch register in which to temporarily load the narrow_klass_base. 6476 assert(r != r12_heapbase, "Encoding a klass in r12"); 6477 mov64(r12_heapbase, (int64_t)Universe::narrow_klass_base()); 6478 subq(r, r12_heapbase); 6479 } 6480 if (Universe::narrow_klass_shift() != 0) { 6481 assert (LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); 6482 shrq(r, LogKlassAlignmentInBytes); 6483 } 6484 if (Universe::narrow_klass_base() != NULL) { 6485 reinit_heapbase(); 6486 } 6487 } 6488 6489 void MacroAssembler::encode_klass_not_null(Register dst, Register src) { 6490 if (dst == src) { 6491 encode_klass_not_null(src); 6492 } else { 6493 if (Universe::narrow_klass_base() != NULL) { 6494 mov64(dst, (int64_t)Universe::narrow_klass_base()); 6495 negq(dst); 6496 addq(dst, src); 6497 } else { 6498 movptr(dst, src); 6499 } 6500 if (Universe::narrow_klass_shift() != 0) { 6501 assert (LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); 6502 shrq(dst, LogKlassAlignmentInBytes); 6503 } 6504 } 6505 } 6506 6507 // Function instr_size_for_decode_klass_not_null() counts the instructions 6508 // generated by decode_klass_not_null(register r) and reinit_heapbase(), 6509 // when (Universe::heap() != NULL). Hence, if the instructions they 6510 // generate change, then this method needs to be updated. 6511 int MacroAssembler::instr_size_for_decode_klass_not_null() { 6512 assert (UseCompressedClassPointers, "only for compressed klass ptrs"); 6513 if (Universe::narrow_klass_base() != NULL) { 6514 // mov64 + addq + shlq? + mov64 (for reinit_heapbase()). 6515 return (Universe::narrow_klass_shift() == 0 ? 20 : 24); 6516 } else { 6517 // longest load decode klass function, mov64, leaq 6518 return 16; 6519 } 6520 } 6521 6522 // !!! If the instructions that get generated here change then function 6523 // instr_size_for_decode_klass_not_null() needs to get updated. 6524 void MacroAssembler::decode_klass_not_null(Register r) { 6525 // Note: it will change flags 6526 assert (UseCompressedClassPointers, "should only be used for compressed headers"); 6527 assert(r != r12_heapbase, "Decoding a klass in r12"); 6528 // Cannot assert, unverified entry point counts instructions (see .ad file) 6529 // vtableStubs also counts instructions in pd_code_size_limit. 6530 // Also do not verify_oop as this is called by verify_oop. 6531 if (Universe::narrow_klass_shift() != 0) { 6532 assert(LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); 6533 shlq(r, LogKlassAlignmentInBytes); 6534 } 6535 // Use r12 as a scratch register in which to temporarily load the narrow_klass_base. 6536 if (Universe::narrow_klass_base() != NULL) { 6537 mov64(r12_heapbase, (int64_t)Universe::narrow_klass_base()); 6538 addq(r, r12_heapbase); 6539 reinit_heapbase(); 6540 } 6541 } 6542 6543 void MacroAssembler::decode_klass_not_null(Register dst, Register src) { 6544 // Note: it will change flags 6545 assert (UseCompressedClassPointers, "should only be used for compressed headers"); 6546 if (dst == src) { 6547 decode_klass_not_null(dst); 6548 } else { 6549 // Cannot assert, unverified entry point counts instructions (see .ad file) 6550 // vtableStubs also counts instructions in pd_code_size_limit. 6551 // Also do not verify_oop as this is called by verify_oop. 6552 mov64(dst, (int64_t)Universe::narrow_klass_base()); 6553 if (Universe::narrow_klass_shift() != 0) { 6554 assert(LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); 6555 assert(LogKlassAlignmentInBytes == Address::times_8, "klass not aligned on 64bits?"); 6556 leaq(dst, Address(dst, src, Address::times_8, 0)); 6557 } else { 6558 addq(dst, src); 6559 } 6560 } 6561 } 6562 6563 void MacroAssembler::set_narrow_oop(Register dst, jobject obj) { 6564 assert (UseCompressedOops, "should only be used for compressed headers"); 6565 assert (Universe::heap() != NULL, "java heap should be initialized"); 6566 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); 6567 int oop_index = oop_recorder()->find_index(obj); 6568 RelocationHolder rspec = oop_Relocation::spec(oop_index); 6569 mov_narrow_oop(dst, oop_index, rspec); 6570 } 6571 6572 void MacroAssembler::set_narrow_oop(Address dst, jobject obj) { 6573 assert (UseCompressedOops, "should only be used for compressed headers"); 6574 assert (Universe::heap() != NULL, "java heap should be initialized"); 6575 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); 6576 int oop_index = oop_recorder()->find_index(obj); 6577 RelocationHolder rspec = oop_Relocation::spec(oop_index); 6578 mov_narrow_oop(dst, oop_index, rspec); 6579 } 6580 6581 void MacroAssembler::set_narrow_klass(Register dst, Klass* k) { 6582 assert (UseCompressedClassPointers, "should only be used for compressed headers"); 6583 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); 6584 int klass_index = oop_recorder()->find_index(k); 6585 RelocationHolder rspec = metadata_Relocation::spec(klass_index); 6586 mov_narrow_oop(dst, Klass::encode_klass(k), rspec); 6587 } 6588 6589 void MacroAssembler::set_narrow_klass(Address dst, Klass* k) { 6590 assert (UseCompressedClassPointers, "should only be used for compressed headers"); 6591 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); 6592 int klass_index = oop_recorder()->find_index(k); 6593 RelocationHolder rspec = metadata_Relocation::spec(klass_index); 6594 mov_narrow_oop(dst, Klass::encode_klass(k), rspec); 6595 } 6596 6597 void MacroAssembler::cmp_narrow_oop(Register dst, jobject obj) { 6598 assert (UseCompressedOops, "should only be used for compressed headers"); 6599 assert (Universe::heap() != NULL, "java heap should be initialized"); 6600 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); 6601 int oop_index = oop_recorder()->find_index(obj); 6602 RelocationHolder rspec = oop_Relocation::spec(oop_index); 6603 Assembler::cmp_narrow_oop(dst, oop_index, rspec); 6604 } 6605 6606 void MacroAssembler::cmp_narrow_oop(Address dst, jobject obj) { 6607 assert (UseCompressedOops, "should only be used for compressed headers"); 6608 assert (Universe::heap() != NULL, "java heap should be initialized"); 6609 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); 6610 int oop_index = oop_recorder()->find_index(obj); 6611 RelocationHolder rspec = oop_Relocation::spec(oop_index); 6612 Assembler::cmp_narrow_oop(dst, oop_index, rspec); 6613 } 6614 6615 void MacroAssembler::cmp_narrow_klass(Register dst, Klass* k) { 6616 assert (UseCompressedClassPointers, "should only be used for compressed headers"); 6617 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); 6618 int klass_index = oop_recorder()->find_index(k); 6619 RelocationHolder rspec = metadata_Relocation::spec(klass_index); 6620 Assembler::cmp_narrow_oop(dst, Klass::encode_klass(k), rspec); 6621 } 6622 6623 void MacroAssembler::cmp_narrow_klass(Address dst, Klass* k) { 6624 assert (UseCompressedClassPointers, "should only be used for compressed headers"); 6625 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); 6626 int klass_index = oop_recorder()->find_index(k); 6627 RelocationHolder rspec = metadata_Relocation::spec(klass_index); 6628 Assembler::cmp_narrow_oop(dst, Klass::encode_klass(k), rspec); 6629 } 6630 6631 void MacroAssembler::reinit_heapbase() { 6632 if (UseCompressedOops || UseCompressedClassPointers) { 6633 if (Universe::heap() != NULL) { 6634 if (Universe::narrow_oop_base() == NULL) { 6635 MacroAssembler::xorptr(r12_heapbase, r12_heapbase); 6636 } else { 6637 mov64(r12_heapbase, (int64_t)Universe::narrow_ptrs_base()); 6638 } 6639 } else { 6640 movptr(r12_heapbase, ExternalAddress((address)Universe::narrow_ptrs_base_addr())); 6641 } 6642 } 6643 } 6644 6645 #endif // _LP64 6646 6647 // C2 compiled method's prolog code. 6648 void MacroAssembler::verified_entry(int framesize, int stack_bang_size, bool fp_mode_24b) { 6649 6650 // WARNING: Initial instruction MUST be 5 bytes or longer so that 6651 // NativeJump::patch_verified_entry will be able to patch out the entry 6652 // code safely. The push to verify stack depth is ok at 5 bytes, 6653 // the frame allocation can be either 3 or 6 bytes. So if we don't do 6654 // stack bang then we must use the 6 byte frame allocation even if 6655 // we have no frame. :-( 6656 assert(stack_bang_size >= framesize || stack_bang_size <= 0, "stack bang size incorrect"); 6657 6658 assert((framesize & (StackAlignmentInBytes-1)) == 0, "frame size not aligned"); 6659 // Remove word for return addr 6660 framesize -= wordSize; 6661 stack_bang_size -= wordSize; 6662 6663 // Calls to C2R adapters often do not accept exceptional returns. 6664 // We require that their callers must bang for them. But be careful, because 6665 // some VM calls (such as call site linkage) can use several kilobytes of 6666 // stack. But the stack safety zone should account for that. 6667 // See bugs 4446381, 4468289, 4497237. 6668 if (stack_bang_size > 0) { 6669 generate_stack_overflow_check(stack_bang_size); 6670 6671 // We always push rbp, so that on return to interpreter rbp, will be 6672 // restored correctly and we can correct the stack. 6673 push(rbp); 6674 // Save caller's stack pointer into RBP if the frame pointer is preserved. 6675 if (PreserveFramePointer) { 6676 mov(rbp, rsp); 6677 } 6678 // Remove word for ebp 6679 framesize -= wordSize; 6680 6681 // Create frame 6682 if (framesize) { 6683 subptr(rsp, framesize); 6684 } 6685 } else { 6686 // Create frame (force generation of a 4 byte immediate value) 6687 subptr_imm32(rsp, framesize); 6688 6689 // Save RBP register now. 6690 framesize -= wordSize; 6691 movptr(Address(rsp, framesize), rbp); 6692 // Save caller's stack pointer into RBP if the frame pointer is preserved. 6693 if (PreserveFramePointer) { 6694 movptr(rbp, rsp); 6695 if (framesize > 0) { 6696 addptr(rbp, framesize); 6697 } 6698 } 6699 } 6700 6701 if (VerifyStackAtCalls) { // Majik cookie to verify stack depth 6702 framesize -= wordSize; 6703 movptr(Address(rsp, framesize), (int32_t)0xbadb100d); 6704 } 6705 6706 #ifndef _LP64 6707 // If method sets FPU control word do it now 6708 if (fp_mode_24b) { 6709 fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_24())); 6710 } 6711 if (UseSSE >= 2 && VerifyFPU) { 6712 verify_FPU(0, "FPU stack must be clean on entry"); 6713 } 6714 #endif 6715 6716 #ifdef ASSERT 6717 if (VerifyStackAtCalls) { 6718 Label L; 6719 push(rax); 6720 mov(rax, rsp); 6721 andptr(rax, StackAlignmentInBytes-1); 6722 cmpptr(rax, StackAlignmentInBytes-wordSize); 6723 pop(rax); 6724 jcc(Assembler::equal, L); 6725 STOP("Stack is not properly aligned!"); 6726 bind(L); 6727 } 6728 #endif 6729 6730 } 6731 6732 // clear memory of size 'cnt' qwords, starting at 'base' using XMM/YMM registers 6733 void MacroAssembler::xmm_clear_mem(Register base, Register cnt, XMMRegister xtmp) { 6734 // cnt - number of qwords (8-byte words). 6735 // base - start address, qword aligned. 6736 Label L_zero_64_bytes, L_loop, L_sloop, L_tail, L_end; 6737 if (UseAVX >= 2) { 6738 vpxor(xtmp, xtmp, xtmp, AVX_256bit); 6739 } else { 6740 pxor(xtmp, xtmp); 6741 } 6742 jmp(L_zero_64_bytes); 6743 6744 BIND(L_loop); 6745 if (UseAVX >= 2) { 6746 vmovdqu(Address(base, 0), xtmp); 6747 vmovdqu(Address(base, 32), xtmp); 6748 } else { 6749 movdqu(Address(base, 0), xtmp); 6750 movdqu(Address(base, 16), xtmp); 6751 movdqu(Address(base, 32), xtmp); 6752 movdqu(Address(base, 48), xtmp); 6753 } 6754 addptr(base, 64); 6755 6756 BIND(L_zero_64_bytes); 6757 subptr(cnt, 8); 6758 jccb(Assembler::greaterEqual, L_loop); 6759 addptr(cnt, 4); 6760 jccb(Assembler::less, L_tail); 6761 // Copy trailing 32 bytes 6762 if (UseAVX >= 2) { 6763 vmovdqu(Address(base, 0), xtmp); 6764 } else { 6765 movdqu(Address(base, 0), xtmp); 6766 movdqu(Address(base, 16), xtmp); 6767 } 6768 addptr(base, 32); 6769 subptr(cnt, 4); 6770 6771 BIND(L_tail); 6772 addptr(cnt, 4); 6773 jccb(Assembler::lessEqual, L_end); 6774 decrement(cnt); 6775 6776 BIND(L_sloop); 6777 movq(Address(base, 0), xtmp); 6778 addptr(base, 8); 6779 decrement(cnt); 6780 jccb(Assembler::greaterEqual, L_sloop); 6781 BIND(L_end); 6782 } 6783 6784 void MacroAssembler::clear_mem(Register base, Register cnt, Register tmp, XMMRegister xtmp, bool is_large) { 6785 // cnt - number of qwords (8-byte words). 6786 // base - start address, qword aligned. 6787 // is_large - if optimizers know cnt is larger than InitArrayShortSize 6788 assert(base==rdi, "base register must be edi for rep stos"); 6789 assert(tmp==rax, "tmp register must be eax for rep stos"); 6790 assert(cnt==rcx, "cnt register must be ecx for rep stos"); 6791 assert(InitArrayShortSize % BytesPerLong == 0, 6792 "InitArrayShortSize should be the multiple of BytesPerLong"); 6793 6794 Label DONE; 6795 6796 if (!is_large || !UseXMMForObjInit) { 6797 xorptr(tmp, tmp); 6798 } 6799 6800 if (!is_large) { 6801 Label LOOP, LONG; 6802 cmpptr(cnt, InitArrayShortSize/BytesPerLong); 6803 jccb(Assembler::greater, LONG); 6804 6805 NOT_LP64(shlptr(cnt, 1);) // convert to number of 32-bit words for 32-bit VM 6806 6807 decrement(cnt); 6808 jccb(Assembler::negative, DONE); // Zero length 6809 6810 // Use individual pointer-sized stores for small counts: 6811 BIND(LOOP); 6812 movptr(Address(base, cnt, Address::times_ptr), tmp); 6813 decrement(cnt); 6814 jccb(Assembler::greaterEqual, LOOP); 6815 jmpb(DONE); 6816 6817 BIND(LONG); 6818 } 6819 6820 // Use longer rep-prefixed ops for non-small counts: 6821 if (UseFastStosb) { 6822 shlptr(cnt, 3); // convert to number of bytes 6823 rep_stosb(); 6824 } else if (UseXMMForObjInit) { 6825 movptr(tmp, base); 6826 xmm_clear_mem(tmp, cnt, xtmp); 6827 } else { 6828 NOT_LP64(shlptr(cnt, 1);) // convert to number of 32-bit words for 32-bit VM 6829 rep_stos(); 6830 } 6831 6832 BIND(DONE); 6833 } 6834 6835 #ifdef COMPILER2 6836 6837 // IndexOf for constant substrings with size >= 8 chars 6838 // which don't need to be loaded through stack. 6839 void MacroAssembler::string_indexofC8(Register str1, Register str2, 6840 Register cnt1, Register cnt2, 6841 int int_cnt2, Register result, 6842 XMMRegister vec, Register tmp, 6843 int ae) { 6844 ShortBranchVerifier sbv(this); 6845 assert(UseSSE42Intrinsics, "SSE4.2 intrinsics are required"); 6846 assert(ae != StrIntrinsicNode::LU, "Invalid encoding"); 6847 6848 // This method uses the pcmpestri instruction with bound registers 6849 // inputs: 6850 // xmm - substring 6851 // rax - substring length (elements count) 6852 // mem - scanned string 6853 // rdx - string length (elements count) 6854 // 0xd - mode: 1100 (substring search) + 01 (unsigned shorts) 6855 // 0xc - mode: 1100 (substring search) + 00 (unsigned bytes) 6856 // outputs: 6857 // rcx - matched index in string 6858 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri"); 6859 int mode = (ae == StrIntrinsicNode::LL) ? 0x0c : 0x0d; // bytes or shorts 6860 int stride = (ae == StrIntrinsicNode::LL) ? 16 : 8; //UU, UL -> 8 6861 Address::ScaleFactor scale1 = (ae == StrIntrinsicNode::LL) ? Address::times_1 : Address::times_2; 6862 Address::ScaleFactor scale2 = (ae == StrIntrinsicNode::UL) ? Address::times_1 : scale1; 6863 6864 Label RELOAD_SUBSTR, SCAN_TO_SUBSTR, SCAN_SUBSTR, 6865 RET_FOUND, RET_NOT_FOUND, EXIT, FOUND_SUBSTR, 6866 MATCH_SUBSTR_HEAD, RELOAD_STR, FOUND_CANDIDATE; 6867 6868 // Note, inline_string_indexOf() generates checks: 6869 // if (substr.count > string.count) return -1; 6870 // if (substr.count == 0) return 0; 6871 assert(int_cnt2 >= stride, "this code is used only for cnt2 >= 8 chars"); 6872 6873 // Load substring. 6874 if (ae == StrIntrinsicNode::UL) { 6875 pmovzxbw(vec, Address(str2, 0)); 6876 } else { 6877 movdqu(vec, Address(str2, 0)); 6878 } 6879 movl(cnt2, int_cnt2); 6880 movptr(result, str1); // string addr 6881 6882 if (int_cnt2 > stride) { 6883 jmpb(SCAN_TO_SUBSTR); 6884 6885 // Reload substr for rescan, this code 6886 // is executed only for large substrings (> 8 chars) 6887 bind(RELOAD_SUBSTR); 6888 if (ae == StrIntrinsicNode::UL) { 6889 pmovzxbw(vec, Address(str2, 0)); 6890 } else { 6891 movdqu(vec, Address(str2, 0)); 6892 } 6893 negptr(cnt2); // Jumped here with negative cnt2, convert to positive 6894 6895 bind(RELOAD_STR); 6896 // We came here after the beginning of the substring was 6897 // matched but the rest of it was not so we need to search 6898 // again. Start from the next element after the previous match. 6899 6900 // cnt2 is number of substring reminding elements and 6901 // cnt1 is number of string reminding elements when cmp failed. 6902 // Restored cnt1 = cnt1 - cnt2 + int_cnt2 6903 subl(cnt1, cnt2); 6904 addl(cnt1, int_cnt2); 6905 movl(cnt2, int_cnt2); // Now restore cnt2 6906 6907 decrementl(cnt1); // Shift to next element 6908 cmpl(cnt1, cnt2); 6909 jcc(Assembler::negative, RET_NOT_FOUND); // Left less then substring 6910 6911 addptr(result, (1<<scale1)); 6912 6913 } // (int_cnt2 > 8) 6914 6915 // Scan string for start of substr in 16-byte vectors 6916 bind(SCAN_TO_SUBSTR); 6917 pcmpestri(vec, Address(result, 0), mode); 6918 jccb(Assembler::below, FOUND_CANDIDATE); // CF == 1 6919 subl(cnt1, stride); 6920 jccb(Assembler::lessEqual, RET_NOT_FOUND); // Scanned full string 6921 cmpl(cnt1, cnt2); 6922 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring 6923 addptr(result, 16); 6924 jmpb(SCAN_TO_SUBSTR); 6925 6926 // Found a potential substr 6927 bind(FOUND_CANDIDATE); 6928 // Matched whole vector if first element matched (tmp(rcx) == 0). 6929 if (int_cnt2 == stride) { 6930 jccb(Assembler::overflow, RET_FOUND); // OF == 1 6931 } else { // int_cnt2 > 8 6932 jccb(Assembler::overflow, FOUND_SUBSTR); 6933 } 6934 // After pcmpestri tmp(rcx) contains matched element index 6935 // Compute start addr of substr 6936 lea(result, Address(result, tmp, scale1)); 6937 6938 // Make sure string is still long enough 6939 subl(cnt1, tmp); 6940 cmpl(cnt1, cnt2); 6941 if (int_cnt2 == stride) { 6942 jccb(Assembler::greaterEqual, SCAN_TO_SUBSTR); 6943 } else { // int_cnt2 > 8 6944 jccb(Assembler::greaterEqual, MATCH_SUBSTR_HEAD); 6945 } 6946 // Left less then substring. 6947 6948 bind(RET_NOT_FOUND); 6949 movl(result, -1); 6950 jmp(EXIT); 6951 6952 if (int_cnt2 > stride) { 6953 // This code is optimized for the case when whole substring 6954 // is matched if its head is matched. 6955 bind(MATCH_SUBSTR_HEAD); 6956 pcmpestri(vec, Address(result, 0), mode); 6957 // Reload only string if does not match 6958 jcc(Assembler::noOverflow, RELOAD_STR); // OF == 0 6959 6960 Label CONT_SCAN_SUBSTR; 6961 // Compare the rest of substring (> 8 chars). 6962 bind(FOUND_SUBSTR); 6963 // First 8 chars are already matched. 6964 negptr(cnt2); 6965 addptr(cnt2, stride); 6966 6967 bind(SCAN_SUBSTR); 6968 subl(cnt1, stride); 6969 cmpl(cnt2, -stride); // Do not read beyond substring 6970 jccb(Assembler::lessEqual, CONT_SCAN_SUBSTR); 6971 // Back-up strings to avoid reading beyond substring: 6972 // cnt1 = cnt1 - cnt2 + 8 6973 addl(cnt1, cnt2); // cnt2 is negative 6974 addl(cnt1, stride); 6975 movl(cnt2, stride); negptr(cnt2); 6976 bind(CONT_SCAN_SUBSTR); 6977 if (int_cnt2 < (int)G) { 6978 int tail_off1 = int_cnt2<<scale1; 6979 int tail_off2 = int_cnt2<<scale2; 6980 if (ae == StrIntrinsicNode::UL) { 6981 pmovzxbw(vec, Address(str2, cnt2, scale2, tail_off2)); 6982 } else { 6983 movdqu(vec, Address(str2, cnt2, scale2, tail_off2)); 6984 } 6985 pcmpestri(vec, Address(result, cnt2, scale1, tail_off1), mode); 6986 } else { 6987 // calculate index in register to avoid integer overflow (int_cnt2*2) 6988 movl(tmp, int_cnt2); 6989 addptr(tmp, cnt2); 6990 if (ae == StrIntrinsicNode::UL) { 6991 pmovzxbw(vec, Address(str2, tmp, scale2, 0)); 6992 } else { 6993 movdqu(vec, Address(str2, tmp, scale2, 0)); 6994 } 6995 pcmpestri(vec, Address(result, tmp, scale1, 0), mode); 6996 } 6997 // Need to reload strings pointers if not matched whole vector 6998 jcc(Assembler::noOverflow, RELOAD_SUBSTR); // OF == 0 6999 addptr(cnt2, stride); 7000 jcc(Assembler::negative, SCAN_SUBSTR); 7001 // Fall through if found full substring 7002 7003 } // (int_cnt2 > 8) 7004 7005 bind(RET_FOUND); 7006 // Found result if we matched full small substring. 7007 // Compute substr offset 7008 subptr(result, str1); 7009 if (ae == StrIntrinsicNode::UU || ae == StrIntrinsicNode::UL) { 7010 shrl(result, 1); // index 7011 } 7012 bind(EXIT); 7013 7014 } // string_indexofC8 7015 7016 // Small strings are loaded through stack if they cross page boundary. 7017 void MacroAssembler::string_indexof(Register str1, Register str2, 7018 Register cnt1, Register cnt2, 7019 int int_cnt2, Register result, 7020 XMMRegister vec, Register tmp, 7021 int ae) { 7022 ShortBranchVerifier sbv(this); 7023 assert(UseSSE42Intrinsics, "SSE4.2 intrinsics are required"); 7024 assert(ae != StrIntrinsicNode::LU, "Invalid encoding"); 7025 7026 // 7027 // int_cnt2 is length of small (< 8 chars) constant substring 7028 // or (-1) for non constant substring in which case its length 7029 // is in cnt2 register. 7030 // 7031 // Note, inline_string_indexOf() generates checks: 7032 // if (substr.count > string.count) return -1; 7033 // if (substr.count == 0) return 0; 7034 // 7035 int stride = (ae == StrIntrinsicNode::LL) ? 16 : 8; //UU, UL -> 8 7036 assert(int_cnt2 == -1 || (0 < int_cnt2 && int_cnt2 < stride), "should be != 0"); 7037 // This method uses the pcmpestri instruction with bound registers 7038 // inputs: 7039 // xmm - substring 7040 // rax - substring length (elements count) 7041 // mem - scanned string 7042 // rdx - string length (elements count) 7043 // 0xd - mode: 1100 (substring search) + 01 (unsigned shorts) 7044 // 0xc - mode: 1100 (substring search) + 00 (unsigned bytes) 7045 // outputs: 7046 // rcx - matched index in string 7047 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri"); 7048 int mode = (ae == StrIntrinsicNode::LL) ? 0x0c : 0x0d; // bytes or shorts 7049 Address::ScaleFactor scale1 = (ae == StrIntrinsicNode::LL) ? Address::times_1 : Address::times_2; 7050 Address::ScaleFactor scale2 = (ae == StrIntrinsicNode::UL) ? Address::times_1 : scale1; 7051 7052 Label RELOAD_SUBSTR, SCAN_TO_SUBSTR, SCAN_SUBSTR, ADJUST_STR, 7053 RET_FOUND, RET_NOT_FOUND, CLEANUP, FOUND_SUBSTR, 7054 FOUND_CANDIDATE; 7055 7056 { //======================================================== 7057 // We don't know where these strings are located 7058 // and we can't read beyond them. Load them through stack. 7059 Label BIG_STRINGS, CHECK_STR, COPY_SUBSTR, COPY_STR; 7060 7061 movptr(tmp, rsp); // save old SP 7062 7063 if (int_cnt2 > 0) { // small (< 8 chars) constant substring 7064 if (int_cnt2 == (1>>scale2)) { // One byte 7065 assert((ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UL), "Only possible for latin1 encoding"); 7066 load_unsigned_byte(result, Address(str2, 0)); 7067 movdl(vec, result); // move 32 bits 7068 } else if (ae == StrIntrinsicNode::LL && int_cnt2 == 3) { // Three bytes 7069 // Not enough header space in 32-bit VM: 12+3 = 15. 7070 movl(result, Address(str2, -1)); 7071 shrl(result, 8); 7072 movdl(vec, result); // move 32 bits 7073 } else if (ae != StrIntrinsicNode::UL && int_cnt2 == (2>>scale2)) { // One char 7074 load_unsigned_short(result, Address(str2, 0)); 7075 movdl(vec, result); // move 32 bits 7076 } else if (ae != StrIntrinsicNode::UL && int_cnt2 == (4>>scale2)) { // Two chars 7077 movdl(vec, Address(str2, 0)); // move 32 bits 7078 } else if (ae != StrIntrinsicNode::UL && int_cnt2 == (8>>scale2)) { // Four chars 7079 movq(vec, Address(str2, 0)); // move 64 bits 7080 } else { // cnt2 = { 3, 5, 6, 7 } || (ae == StrIntrinsicNode::UL && cnt2 ={2, ..., 7}) 7081 // Array header size is 12 bytes in 32-bit VM 7082 // + 6 bytes for 3 chars == 18 bytes, 7083 // enough space to load vec and shift. 7084 assert(HeapWordSize*TypeArrayKlass::header_size() >= 12,"sanity"); 7085 if (ae == StrIntrinsicNode::UL) { 7086 int tail_off = int_cnt2-8; 7087 pmovzxbw(vec, Address(str2, tail_off)); 7088 psrldq(vec, -2*tail_off); 7089 } 7090 else { 7091 int tail_off = int_cnt2*(1<<scale2); 7092 movdqu(vec, Address(str2, tail_off-16)); 7093 psrldq(vec, 16-tail_off); 7094 } 7095 } 7096 } else { // not constant substring 7097 cmpl(cnt2, stride); 7098 jccb(Assembler::aboveEqual, BIG_STRINGS); // Both strings are big enough 7099 7100 // We can read beyond string if srt+16 does not cross page boundary 7101 // since heaps are aligned and mapped by pages. 7102 assert(os::vm_page_size() < (int)G, "default page should be small"); 7103 movl(result, str2); // We need only low 32 bits 7104 andl(result, (os::vm_page_size()-1)); 7105 cmpl(result, (os::vm_page_size()-16)); 7106 jccb(Assembler::belowEqual, CHECK_STR); 7107 7108 // Move small strings to stack to allow load 16 bytes into vec. 7109 subptr(rsp, 16); 7110 int stk_offset = wordSize-(1<<scale2); 7111 push(cnt2); 7112 7113 bind(COPY_SUBSTR); 7114 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UL) { 7115 load_unsigned_byte(result, Address(str2, cnt2, scale2, -1)); 7116 movb(Address(rsp, cnt2, scale2, stk_offset), result); 7117 } else if (ae == StrIntrinsicNode::UU) { 7118 load_unsigned_short(result, Address(str2, cnt2, scale2, -2)); 7119 movw(Address(rsp, cnt2, scale2, stk_offset), result); 7120 } 7121 decrement(cnt2); 7122 jccb(Assembler::notZero, COPY_SUBSTR); 7123 7124 pop(cnt2); 7125 movptr(str2, rsp); // New substring address 7126 } // non constant 7127 7128 bind(CHECK_STR); 7129 cmpl(cnt1, stride); 7130 jccb(Assembler::aboveEqual, BIG_STRINGS); 7131 7132 // Check cross page boundary. 7133 movl(result, str1); // We need only low 32 bits 7134 andl(result, (os::vm_page_size()-1)); 7135 cmpl(result, (os::vm_page_size()-16)); 7136 jccb(Assembler::belowEqual, BIG_STRINGS); 7137 7138 subptr(rsp, 16); 7139 int stk_offset = -(1<<scale1); 7140 if (int_cnt2 < 0) { // not constant 7141 push(cnt2); 7142 stk_offset += wordSize; 7143 } 7144 movl(cnt2, cnt1); 7145 7146 bind(COPY_STR); 7147 if (ae == StrIntrinsicNode::LL) { 7148 load_unsigned_byte(result, Address(str1, cnt2, scale1, -1)); 7149 movb(Address(rsp, cnt2, scale1, stk_offset), result); 7150 } else { 7151 load_unsigned_short(result, Address(str1, cnt2, scale1, -2)); 7152 movw(Address(rsp, cnt2, scale1, stk_offset), result); 7153 } 7154 decrement(cnt2); 7155 jccb(Assembler::notZero, COPY_STR); 7156 7157 if (int_cnt2 < 0) { // not constant 7158 pop(cnt2); 7159 } 7160 movptr(str1, rsp); // New string address 7161 7162 bind(BIG_STRINGS); 7163 // Load substring. 7164 if (int_cnt2 < 0) { // -1 7165 if (ae == StrIntrinsicNode::UL) { 7166 pmovzxbw(vec, Address(str2, 0)); 7167 } else { 7168 movdqu(vec, Address(str2, 0)); 7169 } 7170 push(cnt2); // substr count 7171 push(str2); // substr addr 7172 push(str1); // string addr 7173 } else { 7174 // Small (< 8 chars) constant substrings are loaded already. 7175 movl(cnt2, int_cnt2); 7176 } 7177 push(tmp); // original SP 7178 7179 } // Finished loading 7180 7181 //======================================================== 7182 // Start search 7183 // 7184 7185 movptr(result, str1); // string addr 7186 7187 if (int_cnt2 < 0) { // Only for non constant substring 7188 jmpb(SCAN_TO_SUBSTR); 7189 7190 // SP saved at sp+0 7191 // String saved at sp+1*wordSize 7192 // Substr saved at sp+2*wordSize 7193 // Substr count saved at sp+3*wordSize 7194 7195 // Reload substr for rescan, this code 7196 // is executed only for large substrings (> 8 chars) 7197 bind(RELOAD_SUBSTR); 7198 movptr(str2, Address(rsp, 2*wordSize)); 7199 movl(cnt2, Address(rsp, 3*wordSize)); 7200 if (ae == StrIntrinsicNode::UL) { 7201 pmovzxbw(vec, Address(str2, 0)); 7202 } else { 7203 movdqu(vec, Address(str2, 0)); 7204 } 7205 // We came here after the beginning of the substring was 7206 // matched but the rest of it was not so we need to search 7207 // again. Start from the next element after the previous match. 7208 subptr(str1, result); // Restore counter 7209 if (ae == StrIntrinsicNode::UU || ae == StrIntrinsicNode::UL) { 7210 shrl(str1, 1); 7211 } 7212 addl(cnt1, str1); 7213 decrementl(cnt1); // Shift to next element 7214 cmpl(cnt1, cnt2); 7215 jcc(Assembler::negative, RET_NOT_FOUND); // Left less then substring 7216 7217 addptr(result, (1<<scale1)); 7218 } // non constant 7219 7220 // Scan string for start of substr in 16-byte vectors 7221 bind(SCAN_TO_SUBSTR); 7222 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri"); 7223 pcmpestri(vec, Address(result, 0), mode); 7224 jccb(Assembler::below, FOUND_CANDIDATE); // CF == 1 7225 subl(cnt1, stride); 7226 jccb(Assembler::lessEqual, RET_NOT_FOUND); // Scanned full string 7227 cmpl(cnt1, cnt2); 7228 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring 7229 addptr(result, 16); 7230 7231 bind(ADJUST_STR); 7232 cmpl(cnt1, stride); // Do not read beyond string 7233 jccb(Assembler::greaterEqual, SCAN_TO_SUBSTR); 7234 // Back-up string to avoid reading beyond string. 7235 lea(result, Address(result, cnt1, scale1, -16)); 7236 movl(cnt1, stride); 7237 jmpb(SCAN_TO_SUBSTR); 7238 7239 // Found a potential substr 7240 bind(FOUND_CANDIDATE); 7241 // After pcmpestri tmp(rcx) contains matched element index 7242 7243 // Make sure string is still long enough 7244 subl(cnt1, tmp); 7245 cmpl(cnt1, cnt2); 7246 jccb(Assembler::greaterEqual, FOUND_SUBSTR); 7247 // Left less then substring. 7248 7249 bind(RET_NOT_FOUND); 7250 movl(result, -1); 7251 jmpb(CLEANUP); 7252 7253 bind(FOUND_SUBSTR); 7254 // Compute start addr of substr 7255 lea(result, Address(result, tmp, scale1)); 7256 if (int_cnt2 > 0) { // Constant substring 7257 // Repeat search for small substring (< 8 chars) 7258 // from new point without reloading substring. 7259 // Have to check that we don't read beyond string. 7260 cmpl(tmp, stride-int_cnt2); 7261 jccb(Assembler::greater, ADJUST_STR); 7262 // Fall through if matched whole substring. 7263 } else { // non constant 7264 assert(int_cnt2 == -1, "should be != 0"); 7265 7266 addl(tmp, cnt2); 7267 // Found result if we matched whole substring. 7268 cmpl(tmp, stride); 7269 jccb(Assembler::lessEqual, RET_FOUND); 7270 7271 // Repeat search for small substring (<= 8 chars) 7272 // from new point 'str1' without reloading substring. 7273 cmpl(cnt2, stride); 7274 // Have to check that we don't read beyond string. 7275 jccb(Assembler::lessEqual, ADJUST_STR); 7276 7277 Label CHECK_NEXT, CONT_SCAN_SUBSTR, RET_FOUND_LONG; 7278 // Compare the rest of substring (> 8 chars). 7279 movptr(str1, result); 7280 7281 cmpl(tmp, cnt2); 7282 // First 8 chars are already matched. 7283 jccb(Assembler::equal, CHECK_NEXT); 7284 7285 bind(SCAN_SUBSTR); 7286 pcmpestri(vec, Address(str1, 0), mode); 7287 // Need to reload strings pointers if not matched whole vector 7288 jcc(Assembler::noOverflow, RELOAD_SUBSTR); // OF == 0 7289 7290 bind(CHECK_NEXT); 7291 subl(cnt2, stride); 7292 jccb(Assembler::lessEqual, RET_FOUND_LONG); // Found full substring 7293 addptr(str1, 16); 7294 if (ae == StrIntrinsicNode::UL) { 7295 addptr(str2, 8); 7296 } else { 7297 addptr(str2, 16); 7298 } 7299 subl(cnt1, stride); 7300 cmpl(cnt2, stride); // Do not read beyond substring 7301 jccb(Assembler::greaterEqual, CONT_SCAN_SUBSTR); 7302 // Back-up strings to avoid reading beyond substring. 7303 7304 if (ae == StrIntrinsicNode::UL) { 7305 lea(str2, Address(str2, cnt2, scale2, -8)); 7306 lea(str1, Address(str1, cnt2, scale1, -16)); 7307 } else { 7308 lea(str2, Address(str2, cnt2, scale2, -16)); 7309 lea(str1, Address(str1, cnt2, scale1, -16)); 7310 } 7311 subl(cnt1, cnt2); 7312 movl(cnt2, stride); 7313 addl(cnt1, stride); 7314 bind(CONT_SCAN_SUBSTR); 7315 if (ae == StrIntrinsicNode::UL) { 7316 pmovzxbw(vec, Address(str2, 0)); 7317 } else { 7318 movdqu(vec, Address(str2, 0)); 7319 } 7320 jmp(SCAN_SUBSTR); 7321 7322 bind(RET_FOUND_LONG); 7323 movptr(str1, Address(rsp, wordSize)); 7324 } // non constant 7325 7326 bind(RET_FOUND); 7327 // Compute substr offset 7328 subptr(result, str1); 7329 if (ae == StrIntrinsicNode::UU || ae == StrIntrinsicNode::UL) { 7330 shrl(result, 1); // index 7331 } 7332 bind(CLEANUP); 7333 pop(rsp); // restore SP 7334 7335 } // string_indexof 7336 7337 void MacroAssembler::string_indexof_char(Register str1, Register cnt1, Register ch, Register result, 7338 XMMRegister vec1, XMMRegister vec2, XMMRegister vec3, Register tmp) { 7339 ShortBranchVerifier sbv(this); 7340 assert(UseSSE42Intrinsics, "SSE4.2 intrinsics are required"); 7341 7342 int stride = 8; 7343 7344 Label FOUND_CHAR, SCAN_TO_CHAR, SCAN_TO_CHAR_LOOP, 7345 SCAN_TO_8_CHAR, SCAN_TO_8_CHAR_LOOP, SCAN_TO_16_CHAR_LOOP, 7346 RET_NOT_FOUND, SCAN_TO_8_CHAR_INIT, 7347 FOUND_SEQ_CHAR, DONE_LABEL; 7348 7349 movptr(result, str1); 7350 if (UseAVX >= 2) { 7351 cmpl(cnt1, stride); 7352 jcc(Assembler::less, SCAN_TO_CHAR_LOOP); 7353 cmpl(cnt1, 2*stride); 7354 jcc(Assembler::less, SCAN_TO_8_CHAR_INIT); 7355 movdl(vec1, ch); 7356 vpbroadcastw(vec1, vec1); 7357 vpxor(vec2, vec2); 7358 movl(tmp, cnt1); 7359 andl(tmp, 0xFFFFFFF0); //vector count (in chars) 7360 andl(cnt1,0x0000000F); //tail count (in chars) 7361 7362 bind(SCAN_TO_16_CHAR_LOOP); 7363 vmovdqu(vec3, Address(result, 0)); 7364 vpcmpeqw(vec3, vec3, vec1, 1); 7365 vptest(vec2, vec3); 7366 jcc(Assembler::carryClear, FOUND_CHAR); 7367 addptr(result, 32); 7368 subl(tmp, 2*stride); 7369 jccb(Assembler::notZero, SCAN_TO_16_CHAR_LOOP); 7370 jmp(SCAN_TO_8_CHAR); 7371 bind(SCAN_TO_8_CHAR_INIT); 7372 movdl(vec1, ch); 7373 pshuflw(vec1, vec1, 0x00); 7374 pshufd(vec1, vec1, 0); 7375 pxor(vec2, vec2); 7376 } 7377 bind(SCAN_TO_8_CHAR); 7378 cmpl(cnt1, stride); 7379 if (UseAVX >= 2) { 7380 jcc(Assembler::less, SCAN_TO_CHAR); 7381 } else { 7382 jcc(Assembler::less, SCAN_TO_CHAR_LOOP); 7383 movdl(vec1, ch); 7384 pshuflw(vec1, vec1, 0x00); 7385 pshufd(vec1, vec1, 0); 7386 pxor(vec2, vec2); 7387 } 7388 movl(tmp, cnt1); 7389 andl(tmp, 0xFFFFFFF8); //vector count (in chars) 7390 andl(cnt1,0x00000007); //tail count (in chars) 7391 7392 bind(SCAN_TO_8_CHAR_LOOP); 7393 movdqu(vec3, Address(result, 0)); 7394 pcmpeqw(vec3, vec1); 7395 ptest(vec2, vec3); 7396 jcc(Assembler::carryClear, FOUND_CHAR); 7397 addptr(result, 16); 7398 subl(tmp, stride); 7399 jccb(Assembler::notZero, SCAN_TO_8_CHAR_LOOP); 7400 bind(SCAN_TO_CHAR); 7401 testl(cnt1, cnt1); 7402 jcc(Assembler::zero, RET_NOT_FOUND); 7403 bind(SCAN_TO_CHAR_LOOP); 7404 load_unsigned_short(tmp, Address(result, 0)); 7405 cmpl(ch, tmp); 7406 jccb(Assembler::equal, FOUND_SEQ_CHAR); 7407 addptr(result, 2); 7408 subl(cnt1, 1); 7409 jccb(Assembler::zero, RET_NOT_FOUND); 7410 jmp(SCAN_TO_CHAR_LOOP); 7411 7412 bind(RET_NOT_FOUND); 7413 movl(result, -1); 7414 jmpb(DONE_LABEL); 7415 7416 bind(FOUND_CHAR); 7417 if (UseAVX >= 2) { 7418 vpmovmskb(tmp, vec3); 7419 } else { 7420 pmovmskb(tmp, vec3); 7421 } 7422 bsfl(ch, tmp); 7423 addl(result, ch); 7424 7425 bind(FOUND_SEQ_CHAR); 7426 subptr(result, str1); 7427 shrl(result, 1); 7428 7429 bind(DONE_LABEL); 7430 } // string_indexof_char 7431 7432 // helper function for string_compare 7433 void MacroAssembler::load_next_elements(Register elem1, Register elem2, Register str1, Register str2, 7434 Address::ScaleFactor scale, Address::ScaleFactor scale1, 7435 Address::ScaleFactor scale2, Register index, int ae) { 7436 if (ae == StrIntrinsicNode::LL) { 7437 load_unsigned_byte(elem1, Address(str1, index, scale, 0)); 7438 load_unsigned_byte(elem2, Address(str2, index, scale, 0)); 7439 } else if (ae == StrIntrinsicNode::UU) { 7440 load_unsigned_short(elem1, Address(str1, index, scale, 0)); 7441 load_unsigned_short(elem2, Address(str2, index, scale, 0)); 7442 } else { 7443 load_unsigned_byte(elem1, Address(str1, index, scale1, 0)); 7444 load_unsigned_short(elem2, Address(str2, index, scale2, 0)); 7445 } 7446 } 7447 7448 // Compare strings, used for char[] and byte[]. 7449 void MacroAssembler::string_compare(Register str1, Register str2, 7450 Register cnt1, Register cnt2, Register result, 7451 XMMRegister vec1, int ae) { 7452 ShortBranchVerifier sbv(this); 7453 Label LENGTH_DIFF_LABEL, POP_LABEL, DONE_LABEL, WHILE_HEAD_LABEL; 7454 Label COMPARE_WIDE_VECTORS_LOOP_FAILED; // used only _LP64 && AVX3 7455 int stride, stride2, adr_stride, adr_stride1, adr_stride2; 7456 int stride2x2 = 0x40; 7457 Address::ScaleFactor scale = Address::no_scale; 7458 Address::ScaleFactor scale1 = Address::no_scale; 7459 Address::ScaleFactor scale2 = Address::no_scale; 7460 7461 if (ae != StrIntrinsicNode::LL) { 7462 stride2x2 = 0x20; 7463 } 7464 7465 if (ae == StrIntrinsicNode::LU || ae == StrIntrinsicNode::UL) { 7466 shrl(cnt2, 1); 7467 } 7468 // Compute the minimum of the string lengths and the 7469 // difference of the string lengths (stack). 7470 // Do the conditional move stuff 7471 movl(result, cnt1); 7472 subl(cnt1, cnt2); 7473 push(cnt1); 7474 cmov32(Assembler::lessEqual, cnt2, result); // cnt2 = min(cnt1, cnt2) 7475 7476 // Is the minimum length zero? 7477 testl(cnt2, cnt2); 7478 jcc(Assembler::zero, LENGTH_DIFF_LABEL); 7479 if (ae == StrIntrinsicNode::LL) { 7480 // Load first bytes 7481 load_unsigned_byte(result, Address(str1, 0)); // result = str1[0] 7482 load_unsigned_byte(cnt1, Address(str2, 0)); // cnt1 = str2[0] 7483 } else if (ae == StrIntrinsicNode::UU) { 7484 // Load first characters 7485 load_unsigned_short(result, Address(str1, 0)); 7486 load_unsigned_short(cnt1, Address(str2, 0)); 7487 } else { 7488 load_unsigned_byte(result, Address(str1, 0)); 7489 load_unsigned_short(cnt1, Address(str2, 0)); 7490 } 7491 subl(result, cnt1); 7492 jcc(Assembler::notZero, POP_LABEL); 7493 7494 if (ae == StrIntrinsicNode::UU) { 7495 // Divide length by 2 to get number of chars 7496 shrl(cnt2, 1); 7497 } 7498 cmpl(cnt2, 1); 7499 jcc(Assembler::equal, LENGTH_DIFF_LABEL); 7500 7501 // Check if the strings start at the same location and setup scale and stride 7502 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 7503 cmpptr(str1, str2); 7504 jcc(Assembler::equal, LENGTH_DIFF_LABEL); 7505 if (ae == StrIntrinsicNode::LL) { 7506 scale = Address::times_1; 7507 stride = 16; 7508 } else { 7509 scale = Address::times_2; 7510 stride = 8; 7511 } 7512 } else { 7513 scale1 = Address::times_1; 7514 scale2 = Address::times_2; 7515 // scale not used 7516 stride = 8; 7517 } 7518 7519 if (UseAVX >= 2 && UseSSE42Intrinsics) { 7520 Label COMPARE_WIDE_VECTORS, VECTOR_NOT_EQUAL, COMPARE_WIDE_TAIL, COMPARE_SMALL_STR; 7521 Label COMPARE_WIDE_VECTORS_LOOP, COMPARE_16_CHARS, COMPARE_INDEX_CHAR; 7522 Label COMPARE_WIDE_VECTORS_LOOP_AVX2; 7523 Label COMPARE_TAIL_LONG; 7524 Label COMPARE_WIDE_VECTORS_LOOP_AVX3; // used only _LP64 && AVX3 7525 7526 int pcmpmask = 0x19; 7527 if (ae == StrIntrinsicNode::LL) { 7528 pcmpmask &= ~0x01; 7529 } 7530 7531 // Setup to compare 16-chars (32-bytes) vectors, 7532 // start from first character again because it has aligned address. 7533 if (ae == StrIntrinsicNode::LL) { 7534 stride2 = 32; 7535 } else { 7536 stride2 = 16; 7537 } 7538 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 7539 adr_stride = stride << scale; 7540 } else { 7541 adr_stride1 = 8; //stride << scale1; 7542 adr_stride2 = 16; //stride << scale2; 7543 } 7544 7545 assert(result == rax && cnt2 == rdx && cnt1 == rcx, "pcmpestri"); 7546 // rax and rdx are used by pcmpestri as elements counters 7547 movl(result, cnt2); 7548 andl(cnt2, ~(stride2-1)); // cnt2 holds the vector count 7549 jcc(Assembler::zero, COMPARE_TAIL_LONG); 7550 7551 // fast path : compare first 2 8-char vectors. 7552 bind(COMPARE_16_CHARS); 7553 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 7554 movdqu(vec1, Address(str1, 0)); 7555 } else { 7556 pmovzxbw(vec1, Address(str1, 0)); 7557 } 7558 pcmpestri(vec1, Address(str2, 0), pcmpmask); 7559 jccb(Assembler::below, COMPARE_INDEX_CHAR); 7560 7561 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 7562 movdqu(vec1, Address(str1, adr_stride)); 7563 pcmpestri(vec1, Address(str2, adr_stride), pcmpmask); 7564 } else { 7565 pmovzxbw(vec1, Address(str1, adr_stride1)); 7566 pcmpestri(vec1, Address(str2, adr_stride2), pcmpmask); 7567 } 7568 jccb(Assembler::aboveEqual, COMPARE_WIDE_VECTORS); 7569 addl(cnt1, stride); 7570 7571 // Compare the characters at index in cnt1 7572 bind(COMPARE_INDEX_CHAR); // cnt1 has the offset of the mismatching character 7573 load_next_elements(result, cnt2, str1, str2, scale, scale1, scale2, cnt1, ae); 7574 subl(result, cnt2); 7575 jmp(POP_LABEL); 7576 7577 // Setup the registers to start vector comparison loop 7578 bind(COMPARE_WIDE_VECTORS); 7579 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 7580 lea(str1, Address(str1, result, scale)); 7581 lea(str2, Address(str2, result, scale)); 7582 } else { 7583 lea(str1, Address(str1, result, scale1)); 7584 lea(str2, Address(str2, result, scale2)); 7585 } 7586 subl(result, stride2); 7587 subl(cnt2, stride2); 7588 jcc(Assembler::zero, COMPARE_WIDE_TAIL); 7589 negptr(result); 7590 7591 // In a loop, compare 16-chars (32-bytes) at once using (vpxor+vptest) 7592 bind(COMPARE_WIDE_VECTORS_LOOP); 7593 7594 #ifdef _LP64 7595 if (VM_Version::supports_avx512vlbw()) { // trying 64 bytes fast loop 7596 cmpl(cnt2, stride2x2); 7597 jccb(Assembler::below, COMPARE_WIDE_VECTORS_LOOP_AVX2); 7598 testl(cnt2, stride2x2-1); // cnt2 holds the vector count 7599 jccb(Assembler::notZero, COMPARE_WIDE_VECTORS_LOOP_AVX2); // means we cannot subtract by 0x40 7600 7601 bind(COMPARE_WIDE_VECTORS_LOOP_AVX3); // the hottest loop 7602 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 7603 evmovdquq(vec1, Address(str1, result, scale), Assembler::AVX_512bit); 7604 evpcmpeqb(k7, vec1, Address(str2, result, scale), Assembler::AVX_512bit); // k7 == 11..11, if operands equal, otherwise k7 has some 0 7605 } else { 7606 vpmovzxbw(vec1, Address(str1, result, scale1), Assembler::AVX_512bit); 7607 evpcmpeqb(k7, vec1, Address(str2, result, scale2), Assembler::AVX_512bit); // k7 == 11..11, if operands equal, otherwise k7 has some 0 7608 } 7609 kortestql(k7, k7); 7610 jcc(Assembler::aboveEqual, COMPARE_WIDE_VECTORS_LOOP_FAILED); // miscompare 7611 addptr(result, stride2x2); // update since we already compared at this addr 7612 subl(cnt2, stride2x2); // and sub the size too 7613 jccb(Assembler::notZero, COMPARE_WIDE_VECTORS_LOOP_AVX3); 7614 7615 vpxor(vec1, vec1); 7616 jmpb(COMPARE_WIDE_TAIL); 7617 }//if (VM_Version::supports_avx512vlbw()) 7618 #endif // _LP64 7619 7620 7621 bind(COMPARE_WIDE_VECTORS_LOOP_AVX2); 7622 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 7623 vmovdqu(vec1, Address(str1, result, scale)); 7624 vpxor(vec1, Address(str2, result, scale)); 7625 } else { 7626 vpmovzxbw(vec1, Address(str1, result, scale1), Assembler::AVX_256bit); 7627 vpxor(vec1, Address(str2, result, scale2)); 7628 } 7629 vptest(vec1, vec1); 7630 jcc(Assembler::notZero, VECTOR_NOT_EQUAL); 7631 addptr(result, stride2); 7632 subl(cnt2, stride2); 7633 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS_LOOP); 7634 // clean upper bits of YMM registers 7635 vpxor(vec1, vec1); 7636 7637 // compare wide vectors tail 7638 bind(COMPARE_WIDE_TAIL); 7639 testptr(result, result); 7640 jcc(Assembler::zero, LENGTH_DIFF_LABEL); 7641 7642 movl(result, stride2); 7643 movl(cnt2, result); 7644 negptr(result); 7645 jmp(COMPARE_WIDE_VECTORS_LOOP_AVX2); 7646 7647 // Identifies the mismatching (higher or lower)16-bytes in the 32-byte vectors. 7648 bind(VECTOR_NOT_EQUAL); 7649 // clean upper bits of YMM registers 7650 vpxor(vec1, vec1); 7651 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 7652 lea(str1, Address(str1, result, scale)); 7653 lea(str2, Address(str2, result, scale)); 7654 } else { 7655 lea(str1, Address(str1, result, scale1)); 7656 lea(str2, Address(str2, result, scale2)); 7657 } 7658 jmp(COMPARE_16_CHARS); 7659 7660 // Compare tail chars, length between 1 to 15 chars 7661 bind(COMPARE_TAIL_LONG); 7662 movl(cnt2, result); 7663 cmpl(cnt2, stride); 7664 jcc(Assembler::less, COMPARE_SMALL_STR); 7665 7666 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 7667 movdqu(vec1, Address(str1, 0)); 7668 } else { 7669 pmovzxbw(vec1, Address(str1, 0)); 7670 } 7671 pcmpestri(vec1, Address(str2, 0), pcmpmask); 7672 jcc(Assembler::below, COMPARE_INDEX_CHAR); 7673 subptr(cnt2, stride); 7674 jcc(Assembler::zero, LENGTH_DIFF_LABEL); 7675 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 7676 lea(str1, Address(str1, result, scale)); 7677 lea(str2, Address(str2, result, scale)); 7678 } else { 7679 lea(str1, Address(str1, result, scale1)); 7680 lea(str2, Address(str2, result, scale2)); 7681 } 7682 negptr(cnt2); 7683 jmpb(WHILE_HEAD_LABEL); 7684 7685 bind(COMPARE_SMALL_STR); 7686 } else if (UseSSE42Intrinsics) { 7687 Label COMPARE_WIDE_VECTORS, VECTOR_NOT_EQUAL, COMPARE_TAIL; 7688 int pcmpmask = 0x19; 7689 // Setup to compare 8-char (16-byte) vectors, 7690 // start from first character again because it has aligned address. 7691 movl(result, cnt2); 7692 andl(cnt2, ~(stride - 1)); // cnt2 holds the vector count 7693 if (ae == StrIntrinsicNode::LL) { 7694 pcmpmask &= ~0x01; 7695 } 7696 jcc(Assembler::zero, COMPARE_TAIL); 7697 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 7698 lea(str1, Address(str1, result, scale)); 7699 lea(str2, Address(str2, result, scale)); 7700 } else { 7701 lea(str1, Address(str1, result, scale1)); 7702 lea(str2, Address(str2, result, scale2)); 7703 } 7704 negptr(result); 7705 7706 // pcmpestri 7707 // inputs: 7708 // vec1- substring 7709 // rax - negative string length (elements count) 7710 // mem - scanned string 7711 // rdx - string length (elements count) 7712 // pcmpmask - cmp mode: 11000 (string compare with negated result) 7713 // + 00 (unsigned bytes) or + 01 (unsigned shorts) 7714 // outputs: 7715 // rcx - first mismatched element index 7716 assert(result == rax && cnt2 == rdx && cnt1 == rcx, "pcmpestri"); 7717 7718 bind(COMPARE_WIDE_VECTORS); 7719 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 7720 movdqu(vec1, Address(str1, result, scale)); 7721 pcmpestri(vec1, Address(str2, result, scale), pcmpmask); 7722 } else { 7723 pmovzxbw(vec1, Address(str1, result, scale1)); 7724 pcmpestri(vec1, Address(str2, result, scale2), pcmpmask); 7725 } 7726 // After pcmpestri cnt1(rcx) contains mismatched element index 7727 7728 jccb(Assembler::below, VECTOR_NOT_EQUAL); // CF==1 7729 addptr(result, stride); 7730 subptr(cnt2, stride); 7731 jccb(Assembler::notZero, COMPARE_WIDE_VECTORS); 7732 7733 // compare wide vectors tail 7734 testptr(result, result); 7735 jcc(Assembler::zero, LENGTH_DIFF_LABEL); 7736 7737 movl(cnt2, stride); 7738 movl(result, stride); 7739 negptr(result); 7740 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 7741 movdqu(vec1, Address(str1, result, scale)); 7742 pcmpestri(vec1, Address(str2, result, scale), pcmpmask); 7743 } else { 7744 pmovzxbw(vec1, Address(str1, result, scale1)); 7745 pcmpestri(vec1, Address(str2, result, scale2), pcmpmask); 7746 } 7747 jccb(Assembler::aboveEqual, LENGTH_DIFF_LABEL); 7748 7749 // Mismatched characters in the vectors 7750 bind(VECTOR_NOT_EQUAL); 7751 addptr(cnt1, result); 7752 load_next_elements(result, cnt2, str1, str2, scale, scale1, scale2, cnt1, ae); 7753 subl(result, cnt2); 7754 jmpb(POP_LABEL); 7755 7756 bind(COMPARE_TAIL); // limit is zero 7757 movl(cnt2, result); 7758 // Fallthru to tail compare 7759 } 7760 // Shift str2 and str1 to the end of the arrays, negate min 7761 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 7762 lea(str1, Address(str1, cnt2, scale)); 7763 lea(str2, Address(str2, cnt2, scale)); 7764 } else { 7765 lea(str1, Address(str1, cnt2, scale1)); 7766 lea(str2, Address(str2, cnt2, scale2)); 7767 } 7768 decrementl(cnt2); // first character was compared already 7769 negptr(cnt2); 7770 7771 // Compare the rest of the elements 7772 bind(WHILE_HEAD_LABEL); 7773 load_next_elements(result, cnt1, str1, str2, scale, scale1, scale2, cnt2, ae); 7774 subl(result, cnt1); 7775 jccb(Assembler::notZero, POP_LABEL); 7776 increment(cnt2); 7777 jccb(Assembler::notZero, WHILE_HEAD_LABEL); 7778 7779 // Strings are equal up to min length. Return the length difference. 7780 bind(LENGTH_DIFF_LABEL); 7781 pop(result); 7782 if (ae == StrIntrinsicNode::UU) { 7783 // Divide diff by 2 to get number of chars 7784 sarl(result, 1); 7785 } 7786 jmpb(DONE_LABEL); 7787 7788 #ifdef _LP64 7789 if (VM_Version::supports_avx512vlbw()) { 7790 7791 bind(COMPARE_WIDE_VECTORS_LOOP_FAILED); 7792 7793 kmovql(cnt1, k7); 7794 notq(cnt1); 7795 bsfq(cnt2, cnt1); 7796 if (ae != StrIntrinsicNode::LL) { 7797 // Divide diff by 2 to get number of chars 7798 sarl(cnt2, 1); 7799 } 7800 addq(result, cnt2); 7801 if (ae == StrIntrinsicNode::LL) { 7802 load_unsigned_byte(cnt1, Address(str2, result)); 7803 load_unsigned_byte(result, Address(str1, result)); 7804 } else if (ae == StrIntrinsicNode::UU) { 7805 load_unsigned_short(cnt1, Address(str2, result, scale)); 7806 load_unsigned_short(result, Address(str1, result, scale)); 7807 } else { 7808 load_unsigned_short(cnt1, Address(str2, result, scale2)); 7809 load_unsigned_byte(result, Address(str1, result, scale1)); 7810 } 7811 subl(result, cnt1); 7812 jmpb(POP_LABEL); 7813 }//if (VM_Version::supports_avx512vlbw()) 7814 #endif // _LP64 7815 7816 // Discard the stored length difference 7817 bind(POP_LABEL); 7818 pop(cnt1); 7819 7820 // That's it 7821 bind(DONE_LABEL); 7822 if(ae == StrIntrinsicNode::UL) { 7823 negl(result); 7824 } 7825 7826 } 7827 7828 // Search for Non-ASCII character (Negative byte value) in a byte array, 7829 // return true if it has any and false otherwise. 7830 // ..\jdk\src\java.base\share\classes\java\lang\StringCoding.java 7831 // @HotSpotIntrinsicCandidate 7832 // private static boolean hasNegatives(byte[] ba, int off, int len) { 7833 // for (int i = off; i < off + len; i++) { 7834 // if (ba[i] < 0) { 7835 // return true; 7836 // } 7837 // } 7838 // return false; 7839 // } 7840 void MacroAssembler::has_negatives(Register ary1, Register len, 7841 Register result, Register tmp1, 7842 XMMRegister vec1, XMMRegister vec2) { 7843 // rsi: byte array 7844 // rcx: len 7845 // rax: result 7846 ShortBranchVerifier sbv(this); 7847 assert_different_registers(ary1, len, result, tmp1); 7848 assert_different_registers(vec1, vec2); 7849 Label TRUE_LABEL, FALSE_LABEL, DONE, COMPARE_CHAR, COMPARE_VECTORS, COMPARE_BYTE; 7850 7851 // len == 0 7852 testl(len, len); 7853 jcc(Assembler::zero, FALSE_LABEL); 7854 7855 if ((UseAVX > 2) && // AVX512 7856 VM_Version::supports_avx512vlbw() && 7857 VM_Version::supports_bmi2()) { 7858 7859 set_vector_masking(); // opening of the stub context for programming mask registers 7860 7861 Label test_64_loop, test_tail; 7862 Register tmp3_aliased = len; 7863 7864 movl(tmp1, len); 7865 vpxor(vec2, vec2, vec2, Assembler::AVX_512bit); 7866 7867 andl(tmp1, 64 - 1); // tail count (in chars) 0x3F 7868 andl(len, ~(64 - 1)); // vector count (in chars) 7869 jccb(Assembler::zero, test_tail); 7870 7871 lea(ary1, Address(ary1, len, Address::times_1)); 7872 negptr(len); 7873 7874 bind(test_64_loop); 7875 // Check whether our 64 elements of size byte contain negatives 7876 evpcmpgtb(k2, vec2, Address(ary1, len, Address::times_1), Assembler::AVX_512bit); 7877 kortestql(k2, k2); 7878 jcc(Assembler::notZero, TRUE_LABEL); 7879 7880 addptr(len, 64); 7881 jccb(Assembler::notZero, test_64_loop); 7882 7883 7884 bind(test_tail); 7885 // bail out when there is nothing to be done 7886 testl(tmp1, -1); 7887 jcc(Assembler::zero, FALSE_LABEL); 7888 7889 // Save k1 7890 kmovql(k3, k1); 7891 7892 // ~(~0 << len) applied up to two times (for 32-bit scenario) 7893 #ifdef _LP64 7894 mov64(tmp3_aliased, 0xFFFFFFFFFFFFFFFF); 7895 shlxq(tmp3_aliased, tmp3_aliased, tmp1); 7896 notq(tmp3_aliased); 7897 kmovql(k1, tmp3_aliased); 7898 #else 7899 Label k_init; 7900 jmp(k_init); 7901 7902 // We could not read 64-bits from a general purpose register thus we move 7903 // data required to compose 64 1's to the instruction stream 7904 // We emit 64 byte wide series of elements from 0..63 which later on would 7905 // be used as a compare targets with tail count contained in tmp1 register. 7906 // Result would be a k1 register having tmp1 consecutive number or 1 7907 // counting from least significant bit. 7908 address tmp = pc(); 7909 emit_int64(0x0706050403020100); 7910 emit_int64(0x0F0E0D0C0B0A0908); 7911 emit_int64(0x1716151413121110); 7912 emit_int64(0x1F1E1D1C1B1A1918); 7913 emit_int64(0x2726252423222120); 7914 emit_int64(0x2F2E2D2C2B2A2928); 7915 emit_int64(0x3736353433323130); 7916 emit_int64(0x3F3E3D3C3B3A3938); 7917 7918 bind(k_init); 7919 lea(len, InternalAddress(tmp)); 7920 // create mask to test for negative byte inside a vector 7921 evpbroadcastb(vec1, tmp1, Assembler::AVX_512bit); 7922 evpcmpgtb(k1, vec1, Address(len, 0), Assembler::AVX_512bit); 7923 7924 #endif 7925 evpcmpgtb(k2, k1, vec2, Address(ary1, 0), Assembler::AVX_512bit); 7926 ktestq(k2, k1); 7927 // Restore k1 7928 kmovql(k1, k3); 7929 jcc(Assembler::notZero, TRUE_LABEL); 7930 7931 jmp(FALSE_LABEL); 7932 7933 clear_vector_masking(); // closing of the stub context for programming mask registers 7934 } else { 7935 movl(result, len); // copy 7936 7937 if (UseAVX == 2 && UseSSE >= 2) { 7938 // With AVX2, use 32-byte vector compare 7939 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL; 7940 7941 // Compare 32-byte vectors 7942 andl(result, 0x0000001f); // tail count (in bytes) 7943 andl(len, 0xffffffe0); // vector count (in bytes) 7944 jccb(Assembler::zero, COMPARE_TAIL); 7945 7946 lea(ary1, Address(ary1, len, Address::times_1)); 7947 negptr(len); 7948 7949 movl(tmp1, 0x80808080); // create mask to test for Unicode chars in vector 7950 movdl(vec2, tmp1); 7951 vpbroadcastd(vec2, vec2); 7952 7953 bind(COMPARE_WIDE_VECTORS); 7954 vmovdqu(vec1, Address(ary1, len, Address::times_1)); 7955 vptest(vec1, vec2); 7956 jccb(Assembler::notZero, TRUE_LABEL); 7957 addptr(len, 32); 7958 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS); 7959 7960 testl(result, result); 7961 jccb(Assembler::zero, FALSE_LABEL); 7962 7963 vmovdqu(vec1, Address(ary1, result, Address::times_1, -32)); 7964 vptest(vec1, vec2); 7965 jccb(Assembler::notZero, TRUE_LABEL); 7966 jmpb(FALSE_LABEL); 7967 7968 bind(COMPARE_TAIL); // len is zero 7969 movl(len, result); 7970 // Fallthru to tail compare 7971 } else if (UseSSE42Intrinsics) { 7972 // With SSE4.2, use double quad vector compare 7973 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL; 7974 7975 // Compare 16-byte vectors 7976 andl(result, 0x0000000f); // tail count (in bytes) 7977 andl(len, 0xfffffff0); // vector count (in bytes) 7978 jccb(Assembler::zero, COMPARE_TAIL); 7979 7980 lea(ary1, Address(ary1, len, Address::times_1)); 7981 negptr(len); 7982 7983 movl(tmp1, 0x80808080); 7984 movdl(vec2, tmp1); 7985 pshufd(vec2, vec2, 0); 7986 7987 bind(COMPARE_WIDE_VECTORS); 7988 movdqu(vec1, Address(ary1, len, Address::times_1)); 7989 ptest(vec1, vec2); 7990 jccb(Assembler::notZero, TRUE_LABEL); 7991 addptr(len, 16); 7992 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS); 7993 7994 testl(result, result); 7995 jccb(Assembler::zero, FALSE_LABEL); 7996 7997 movdqu(vec1, Address(ary1, result, Address::times_1, -16)); 7998 ptest(vec1, vec2); 7999 jccb(Assembler::notZero, TRUE_LABEL); 8000 jmpb(FALSE_LABEL); 8001 8002 bind(COMPARE_TAIL); // len is zero 8003 movl(len, result); 8004 // Fallthru to tail compare 8005 } 8006 } 8007 // Compare 4-byte vectors 8008 andl(len, 0xfffffffc); // vector count (in bytes) 8009 jccb(Assembler::zero, COMPARE_CHAR); 8010 8011 lea(ary1, Address(ary1, len, Address::times_1)); 8012 negptr(len); 8013 8014 bind(COMPARE_VECTORS); 8015 movl(tmp1, Address(ary1, len, Address::times_1)); 8016 andl(tmp1, 0x80808080); 8017 jccb(Assembler::notZero, TRUE_LABEL); 8018 addptr(len, 4); 8019 jcc(Assembler::notZero, COMPARE_VECTORS); 8020 8021 // Compare trailing char (final 2 bytes), if any 8022 bind(COMPARE_CHAR); 8023 testl(result, 0x2); // tail char 8024 jccb(Assembler::zero, COMPARE_BYTE); 8025 load_unsigned_short(tmp1, Address(ary1, 0)); 8026 andl(tmp1, 0x00008080); 8027 jccb(Assembler::notZero, TRUE_LABEL); 8028 subptr(result, 2); 8029 lea(ary1, Address(ary1, 2)); 8030 8031 bind(COMPARE_BYTE); 8032 testl(result, 0x1); // tail byte 8033 jccb(Assembler::zero, FALSE_LABEL); 8034 load_unsigned_byte(tmp1, Address(ary1, 0)); 8035 andl(tmp1, 0x00000080); 8036 jccb(Assembler::notEqual, TRUE_LABEL); 8037 jmpb(FALSE_LABEL); 8038 8039 bind(TRUE_LABEL); 8040 movl(result, 1); // return true 8041 jmpb(DONE); 8042 8043 bind(FALSE_LABEL); 8044 xorl(result, result); // return false 8045 8046 // That's it 8047 bind(DONE); 8048 if (UseAVX >= 2 && UseSSE >= 2) { 8049 // clean upper bits of YMM registers 8050 vpxor(vec1, vec1); 8051 vpxor(vec2, vec2); 8052 } 8053 } 8054 // Compare char[] or byte[] arrays aligned to 4 bytes or substrings. 8055 void MacroAssembler::arrays_equals(bool is_array_equ, Register ary1, Register ary2, 8056 Register limit, Register result, Register chr, 8057 XMMRegister vec1, XMMRegister vec2, bool is_char) { 8058 ShortBranchVerifier sbv(this); 8059 Label TRUE_LABEL, FALSE_LABEL, DONE, COMPARE_VECTORS, COMPARE_CHAR, COMPARE_BYTE; 8060 8061 int length_offset = arrayOopDesc::length_offset_in_bytes(); 8062 int base_offset = arrayOopDesc::base_offset_in_bytes(is_char ? T_CHAR : T_BYTE); 8063 8064 if (is_array_equ) { 8065 // Check the input args 8066 cmpoop(ary1, ary2); 8067 jcc(Assembler::equal, TRUE_LABEL); 8068 8069 // Need additional checks for arrays_equals. 8070 testptr(ary1, ary1); 8071 jcc(Assembler::zero, FALSE_LABEL); 8072 testptr(ary2, ary2); 8073 jcc(Assembler::zero, FALSE_LABEL); 8074 8075 // Check the lengths 8076 movl(limit, Address(ary1, length_offset)); 8077 cmpl(limit, Address(ary2, length_offset)); 8078 jcc(Assembler::notEqual, FALSE_LABEL); 8079 } 8080 8081 // count == 0 8082 testl(limit, limit); 8083 jcc(Assembler::zero, TRUE_LABEL); 8084 8085 if (is_array_equ) { 8086 // Load array address 8087 lea(ary1, Address(ary1, base_offset)); 8088 lea(ary2, Address(ary2, base_offset)); 8089 } 8090 8091 if (is_array_equ && is_char) { 8092 // arrays_equals when used for char[]. 8093 shll(limit, 1); // byte count != 0 8094 } 8095 movl(result, limit); // copy 8096 8097 if (UseAVX >= 2) { 8098 // With AVX2, use 32-byte vector compare 8099 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL; 8100 8101 // Compare 32-byte vectors 8102 andl(result, 0x0000001f); // tail count (in bytes) 8103 andl(limit, 0xffffffe0); // vector count (in bytes) 8104 jcc(Assembler::zero, COMPARE_TAIL); 8105 8106 lea(ary1, Address(ary1, limit, Address::times_1)); 8107 lea(ary2, Address(ary2, limit, Address::times_1)); 8108 negptr(limit); 8109 8110 bind(COMPARE_WIDE_VECTORS); 8111 8112 #ifdef _LP64 8113 if (VM_Version::supports_avx512vlbw()) { // trying 64 bytes fast loop 8114 Label COMPARE_WIDE_VECTORS_LOOP_AVX2, COMPARE_WIDE_VECTORS_LOOP_AVX3; 8115 8116 cmpl(limit, -64); 8117 jccb(Assembler::greater, COMPARE_WIDE_VECTORS_LOOP_AVX2); 8118 8119 bind(COMPARE_WIDE_VECTORS_LOOP_AVX3); // the hottest loop 8120 8121 evmovdquq(vec1, Address(ary1, limit, Address::times_1), Assembler::AVX_512bit); 8122 evpcmpeqb(k7, vec1, Address(ary2, limit, Address::times_1), Assembler::AVX_512bit); 8123 kortestql(k7, k7); 8124 jcc(Assembler::aboveEqual, FALSE_LABEL); // miscompare 8125 addptr(limit, 64); // update since we already compared at this addr 8126 cmpl(limit, -64); 8127 jccb(Assembler::lessEqual, COMPARE_WIDE_VECTORS_LOOP_AVX3); 8128 8129 // At this point we may still need to compare -limit+result bytes. 8130 // We could execute the next two instruction and just continue via non-wide path: 8131 // cmpl(limit, 0); 8132 // jcc(Assembler::equal, COMPARE_TAIL); // true 8133 // But since we stopped at the points ary{1,2}+limit which are 8134 // not farther than 64 bytes from the ends of arrays ary{1,2}+result 8135 // (|limit| <= 32 and result < 32), 8136 // we may just compare the last 64 bytes. 8137 // 8138 addptr(result, -64); // it is safe, bc we just came from this area 8139 evmovdquq(vec1, Address(ary1, result, Address::times_1), Assembler::AVX_512bit); 8140 evpcmpeqb(k7, vec1, Address(ary2, result, Address::times_1), Assembler::AVX_512bit); 8141 kortestql(k7, k7); 8142 jcc(Assembler::aboveEqual, FALSE_LABEL); // miscompare 8143 8144 jmp(TRUE_LABEL); 8145 8146 bind(COMPARE_WIDE_VECTORS_LOOP_AVX2); 8147 8148 }//if (VM_Version::supports_avx512vlbw()) 8149 #endif //_LP64 8150 8151 vmovdqu(vec1, Address(ary1, limit, Address::times_1)); 8152 vmovdqu(vec2, Address(ary2, limit, Address::times_1)); 8153 vpxor(vec1, vec2); 8154 8155 vptest(vec1, vec1); 8156 jcc(Assembler::notZero, FALSE_LABEL); 8157 addptr(limit, 32); 8158 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS); 8159 8160 testl(result, result); 8161 jcc(Assembler::zero, TRUE_LABEL); 8162 8163 vmovdqu(vec1, Address(ary1, result, Address::times_1, -32)); 8164 vmovdqu(vec2, Address(ary2, result, Address::times_1, -32)); 8165 vpxor(vec1, vec2); 8166 8167 vptest(vec1, vec1); 8168 jccb(Assembler::notZero, FALSE_LABEL); 8169 jmpb(TRUE_LABEL); 8170 8171 bind(COMPARE_TAIL); // limit is zero 8172 movl(limit, result); 8173 // Fallthru to tail compare 8174 } else if (UseSSE42Intrinsics) { 8175 // With SSE4.2, use double quad vector compare 8176 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL; 8177 8178 // Compare 16-byte vectors 8179 andl(result, 0x0000000f); // tail count (in bytes) 8180 andl(limit, 0xfffffff0); // vector count (in bytes) 8181 jcc(Assembler::zero, COMPARE_TAIL); 8182 8183 lea(ary1, Address(ary1, limit, Address::times_1)); 8184 lea(ary2, Address(ary2, limit, Address::times_1)); 8185 negptr(limit); 8186 8187 bind(COMPARE_WIDE_VECTORS); 8188 movdqu(vec1, Address(ary1, limit, Address::times_1)); 8189 movdqu(vec2, Address(ary2, limit, Address::times_1)); 8190 pxor(vec1, vec2); 8191 8192 ptest(vec1, vec1); 8193 jcc(Assembler::notZero, FALSE_LABEL); 8194 addptr(limit, 16); 8195 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS); 8196 8197 testl(result, result); 8198 jcc(Assembler::zero, TRUE_LABEL); 8199 8200 movdqu(vec1, Address(ary1, result, Address::times_1, -16)); 8201 movdqu(vec2, Address(ary2, result, Address::times_1, -16)); 8202 pxor(vec1, vec2); 8203 8204 ptest(vec1, vec1); 8205 jccb(Assembler::notZero, FALSE_LABEL); 8206 jmpb(TRUE_LABEL); 8207 8208 bind(COMPARE_TAIL); // limit is zero 8209 movl(limit, result); 8210 // Fallthru to tail compare 8211 } 8212 8213 // Compare 4-byte vectors 8214 andl(limit, 0xfffffffc); // vector count (in bytes) 8215 jccb(Assembler::zero, COMPARE_CHAR); 8216 8217 lea(ary1, Address(ary1, limit, Address::times_1)); 8218 lea(ary2, Address(ary2, limit, Address::times_1)); 8219 negptr(limit); 8220 8221 bind(COMPARE_VECTORS); 8222 movl(chr, Address(ary1, limit, Address::times_1)); 8223 cmpl(chr, Address(ary2, limit, Address::times_1)); 8224 jccb(Assembler::notEqual, FALSE_LABEL); 8225 addptr(limit, 4); 8226 jcc(Assembler::notZero, COMPARE_VECTORS); 8227 8228 // Compare trailing char (final 2 bytes), if any 8229 bind(COMPARE_CHAR); 8230 testl(result, 0x2); // tail char 8231 jccb(Assembler::zero, COMPARE_BYTE); 8232 load_unsigned_short(chr, Address(ary1, 0)); 8233 load_unsigned_short(limit, Address(ary2, 0)); 8234 cmpl(chr, limit); 8235 jccb(Assembler::notEqual, FALSE_LABEL); 8236 8237 if (is_array_equ && is_char) { 8238 bind(COMPARE_BYTE); 8239 } else { 8240 lea(ary1, Address(ary1, 2)); 8241 lea(ary2, Address(ary2, 2)); 8242 8243 bind(COMPARE_BYTE); 8244 testl(result, 0x1); // tail byte 8245 jccb(Assembler::zero, TRUE_LABEL); 8246 load_unsigned_byte(chr, Address(ary1, 0)); 8247 load_unsigned_byte(limit, Address(ary2, 0)); 8248 cmpl(chr, limit); 8249 jccb(Assembler::notEqual, FALSE_LABEL); 8250 } 8251 bind(TRUE_LABEL); 8252 movl(result, 1); // return true 8253 jmpb(DONE); 8254 8255 bind(FALSE_LABEL); 8256 xorl(result, result); // return false 8257 8258 // That's it 8259 bind(DONE); 8260 if (UseAVX >= 2) { 8261 // clean upper bits of YMM registers 8262 vpxor(vec1, vec1); 8263 vpxor(vec2, vec2); 8264 } 8265 } 8266 8267 #endif 8268 8269 void MacroAssembler::generate_fill(BasicType t, bool aligned, 8270 Register to, Register value, Register count, 8271 Register rtmp, XMMRegister xtmp) { 8272 ShortBranchVerifier sbv(this); 8273 assert_different_registers(to, value, count, rtmp); 8274 Label L_exit, L_skip_align1, L_skip_align2, L_fill_byte; 8275 Label L_fill_2_bytes, L_fill_4_bytes; 8276 8277 int shift = -1; 8278 switch (t) { 8279 case T_BYTE: 8280 shift = 2; 8281 break; 8282 case T_SHORT: 8283 shift = 1; 8284 break; 8285 case T_INT: 8286 shift = 0; 8287 break; 8288 default: ShouldNotReachHere(); 8289 } 8290 8291 if (t == T_BYTE) { 8292 andl(value, 0xff); 8293 movl(rtmp, value); 8294 shll(rtmp, 8); 8295 orl(value, rtmp); 8296 } 8297 if (t == T_SHORT) { 8298 andl(value, 0xffff); 8299 } 8300 if (t == T_BYTE || t == T_SHORT) { 8301 movl(rtmp, value); 8302 shll(rtmp, 16); 8303 orl(value, rtmp); 8304 } 8305 8306 cmpl(count, 2<<shift); // Short arrays (< 8 bytes) fill by element 8307 jcc(Assembler::below, L_fill_4_bytes); // use unsigned cmp 8308 if (!UseUnalignedLoadStores && !aligned && (t == T_BYTE || t == T_SHORT)) { 8309 // align source address at 4 bytes address boundary 8310 if (t == T_BYTE) { 8311 // One byte misalignment happens only for byte arrays 8312 testptr(to, 1); 8313 jccb(Assembler::zero, L_skip_align1); 8314 movb(Address(to, 0), value); 8315 increment(to); 8316 decrement(count); 8317 BIND(L_skip_align1); 8318 } 8319 // Two bytes misalignment happens only for byte and short (char) arrays 8320 testptr(to, 2); 8321 jccb(Assembler::zero, L_skip_align2); 8322 movw(Address(to, 0), value); 8323 addptr(to, 2); 8324 subl(count, 1<<(shift-1)); 8325 BIND(L_skip_align2); 8326 } 8327 if (UseSSE < 2) { 8328 Label L_fill_32_bytes_loop, L_check_fill_8_bytes, L_fill_8_bytes_loop, L_fill_8_bytes; 8329 // Fill 32-byte chunks 8330 subl(count, 8 << shift); 8331 jcc(Assembler::less, L_check_fill_8_bytes); 8332 align(16); 8333 8334 BIND(L_fill_32_bytes_loop); 8335 8336 for (int i = 0; i < 32; i += 4) { 8337 movl(Address(to, i), value); 8338 } 8339 8340 addptr(to, 32); 8341 subl(count, 8 << shift); 8342 jcc(Assembler::greaterEqual, L_fill_32_bytes_loop); 8343 BIND(L_check_fill_8_bytes); 8344 addl(count, 8 << shift); 8345 jccb(Assembler::zero, L_exit); 8346 jmpb(L_fill_8_bytes); 8347 8348 // 8349 // length is too short, just fill qwords 8350 // 8351 BIND(L_fill_8_bytes_loop); 8352 movl(Address(to, 0), value); 8353 movl(Address(to, 4), value); 8354 addptr(to, 8); 8355 BIND(L_fill_8_bytes); 8356 subl(count, 1 << (shift + 1)); 8357 jcc(Assembler::greaterEqual, L_fill_8_bytes_loop); 8358 // fall through to fill 4 bytes 8359 } else { 8360 Label L_fill_32_bytes; 8361 if (!UseUnalignedLoadStores) { 8362 // align to 8 bytes, we know we are 4 byte aligned to start 8363 testptr(to, 4); 8364 jccb(Assembler::zero, L_fill_32_bytes); 8365 movl(Address(to, 0), value); 8366 addptr(to, 4); 8367 subl(count, 1<<shift); 8368 } 8369 BIND(L_fill_32_bytes); 8370 { 8371 assert( UseSSE >= 2, "supported cpu only" ); 8372 Label L_fill_32_bytes_loop, L_check_fill_8_bytes, L_fill_8_bytes_loop, L_fill_8_bytes; 8373 if (UseAVX > 2) { 8374 movl(rtmp, 0xffff); 8375 kmovwl(k1, rtmp); 8376 } 8377 movdl(xtmp, value); 8378 if (UseAVX > 2 && UseUnalignedLoadStores) { 8379 // Fill 64-byte chunks 8380 Label L_fill_64_bytes_loop, L_check_fill_32_bytes; 8381 evpbroadcastd(xtmp, xtmp, Assembler::AVX_512bit); 8382 8383 subl(count, 16 << shift); 8384 jcc(Assembler::less, L_check_fill_32_bytes); 8385 align(16); 8386 8387 BIND(L_fill_64_bytes_loop); 8388 evmovdqul(Address(to, 0), xtmp, Assembler::AVX_512bit); 8389 addptr(to, 64); 8390 subl(count, 16 << shift); 8391 jcc(Assembler::greaterEqual, L_fill_64_bytes_loop); 8392 8393 BIND(L_check_fill_32_bytes); 8394 addl(count, 8 << shift); 8395 jccb(Assembler::less, L_check_fill_8_bytes); 8396 vmovdqu(Address(to, 0), xtmp); 8397 addptr(to, 32); 8398 subl(count, 8 << shift); 8399 8400 BIND(L_check_fill_8_bytes); 8401 } else if (UseAVX == 2 && UseUnalignedLoadStores) { 8402 // Fill 64-byte chunks 8403 Label L_fill_64_bytes_loop, L_check_fill_32_bytes; 8404 vpbroadcastd(xtmp, xtmp); 8405 8406 subl(count, 16 << shift); 8407 jcc(Assembler::less, L_check_fill_32_bytes); 8408 align(16); 8409 8410 BIND(L_fill_64_bytes_loop); 8411 vmovdqu(Address(to, 0), xtmp); 8412 vmovdqu(Address(to, 32), xtmp); 8413 addptr(to, 64); 8414 subl(count, 16 << shift); 8415 jcc(Assembler::greaterEqual, L_fill_64_bytes_loop); 8416 8417 BIND(L_check_fill_32_bytes); 8418 addl(count, 8 << shift); 8419 jccb(Assembler::less, L_check_fill_8_bytes); 8420 vmovdqu(Address(to, 0), xtmp); 8421 addptr(to, 32); 8422 subl(count, 8 << shift); 8423 8424 BIND(L_check_fill_8_bytes); 8425 // clean upper bits of YMM registers 8426 movdl(xtmp, value); 8427 pshufd(xtmp, xtmp, 0); 8428 } else { 8429 // Fill 32-byte chunks 8430 pshufd(xtmp, xtmp, 0); 8431 8432 subl(count, 8 << shift); 8433 jcc(Assembler::less, L_check_fill_8_bytes); 8434 align(16); 8435 8436 BIND(L_fill_32_bytes_loop); 8437 8438 if (UseUnalignedLoadStores) { 8439 movdqu(Address(to, 0), xtmp); 8440 movdqu(Address(to, 16), xtmp); 8441 } else { 8442 movq(Address(to, 0), xtmp); 8443 movq(Address(to, 8), xtmp); 8444 movq(Address(to, 16), xtmp); 8445 movq(Address(to, 24), xtmp); 8446 } 8447 8448 addptr(to, 32); 8449 subl(count, 8 << shift); 8450 jcc(Assembler::greaterEqual, L_fill_32_bytes_loop); 8451 8452 BIND(L_check_fill_8_bytes); 8453 } 8454 addl(count, 8 << shift); 8455 jccb(Assembler::zero, L_exit); 8456 jmpb(L_fill_8_bytes); 8457 8458 // 8459 // length is too short, just fill qwords 8460 // 8461 BIND(L_fill_8_bytes_loop); 8462 movq(Address(to, 0), xtmp); 8463 addptr(to, 8); 8464 BIND(L_fill_8_bytes); 8465 subl(count, 1 << (shift + 1)); 8466 jcc(Assembler::greaterEqual, L_fill_8_bytes_loop); 8467 } 8468 } 8469 // fill trailing 4 bytes 8470 BIND(L_fill_4_bytes); 8471 testl(count, 1<<shift); 8472 jccb(Assembler::zero, L_fill_2_bytes); 8473 movl(Address(to, 0), value); 8474 if (t == T_BYTE || t == T_SHORT) { 8475 addptr(to, 4); 8476 BIND(L_fill_2_bytes); 8477 // fill trailing 2 bytes 8478 testl(count, 1<<(shift-1)); 8479 jccb(Assembler::zero, L_fill_byte); 8480 movw(Address(to, 0), value); 8481 if (t == T_BYTE) { 8482 addptr(to, 2); 8483 BIND(L_fill_byte); 8484 // fill trailing byte 8485 testl(count, 1); 8486 jccb(Assembler::zero, L_exit); 8487 movb(Address(to, 0), value); 8488 } else { 8489 BIND(L_fill_byte); 8490 } 8491 } else { 8492 BIND(L_fill_2_bytes); 8493 } 8494 BIND(L_exit); 8495 } 8496 8497 // encode char[] to byte[] in ISO_8859_1 8498 //@HotSpotIntrinsicCandidate 8499 //private static int implEncodeISOArray(byte[] sa, int sp, 8500 //byte[] da, int dp, int len) { 8501 // int i = 0; 8502 // for (; i < len; i++) { 8503 // char c = StringUTF16.getChar(sa, sp++); 8504 // if (c > '\u00FF') 8505 // break; 8506 // da[dp++] = (byte)c; 8507 // } 8508 // return i; 8509 //} 8510 void MacroAssembler::encode_iso_array(Register src, Register dst, Register len, 8511 XMMRegister tmp1Reg, XMMRegister tmp2Reg, 8512 XMMRegister tmp3Reg, XMMRegister tmp4Reg, 8513 Register tmp5, Register result) { 8514 8515 // rsi: src 8516 // rdi: dst 8517 // rdx: len 8518 // rcx: tmp5 8519 // rax: result 8520 ShortBranchVerifier sbv(this); 8521 assert_different_registers(src, dst, len, tmp5, result); 8522 Label L_done, L_copy_1_char, L_copy_1_char_exit; 8523 8524 // set result 8525 xorl(result, result); 8526 // check for zero length 8527 testl(len, len); 8528 jcc(Assembler::zero, L_done); 8529 8530 movl(result, len); 8531 8532 // Setup pointers 8533 lea(src, Address(src, len, Address::times_2)); // char[] 8534 lea(dst, Address(dst, len, Address::times_1)); // byte[] 8535 negptr(len); 8536 8537 if (UseSSE42Intrinsics || UseAVX >= 2) { 8538 Label L_chars_8_check, L_copy_8_chars, L_copy_8_chars_exit; 8539 Label L_chars_16_check, L_copy_16_chars, L_copy_16_chars_exit; 8540 8541 if (UseAVX >= 2) { 8542 Label L_chars_32_check, L_copy_32_chars, L_copy_32_chars_exit; 8543 movl(tmp5, 0xff00ff00); // create mask to test for Unicode chars in vector 8544 movdl(tmp1Reg, tmp5); 8545 vpbroadcastd(tmp1Reg, tmp1Reg); 8546 jmp(L_chars_32_check); 8547 8548 bind(L_copy_32_chars); 8549 vmovdqu(tmp3Reg, Address(src, len, Address::times_2, -64)); 8550 vmovdqu(tmp4Reg, Address(src, len, Address::times_2, -32)); 8551 vpor(tmp2Reg, tmp3Reg, tmp4Reg, /* vector_len */ 1); 8552 vptest(tmp2Reg, tmp1Reg); // check for Unicode chars in vector 8553 jccb(Assembler::notZero, L_copy_32_chars_exit); 8554 vpackuswb(tmp3Reg, tmp3Reg, tmp4Reg, /* vector_len */ 1); 8555 vpermq(tmp4Reg, tmp3Reg, 0xD8, /* vector_len */ 1); 8556 vmovdqu(Address(dst, len, Address::times_1, -32), tmp4Reg); 8557 8558 bind(L_chars_32_check); 8559 addptr(len, 32); 8560 jcc(Assembler::lessEqual, L_copy_32_chars); 8561 8562 bind(L_copy_32_chars_exit); 8563 subptr(len, 16); 8564 jccb(Assembler::greater, L_copy_16_chars_exit); 8565 8566 } else if (UseSSE42Intrinsics) { 8567 movl(tmp5, 0xff00ff00); // create mask to test for Unicode chars in vector 8568 movdl(tmp1Reg, tmp5); 8569 pshufd(tmp1Reg, tmp1Reg, 0); 8570 jmpb(L_chars_16_check); 8571 } 8572 8573 bind(L_copy_16_chars); 8574 if (UseAVX >= 2) { 8575 vmovdqu(tmp2Reg, Address(src, len, Address::times_2, -32)); 8576 vptest(tmp2Reg, tmp1Reg); 8577 jcc(Assembler::notZero, L_copy_16_chars_exit); 8578 vpackuswb(tmp2Reg, tmp2Reg, tmp1Reg, /* vector_len */ 1); 8579 vpermq(tmp3Reg, tmp2Reg, 0xD8, /* vector_len */ 1); 8580 } else { 8581 if (UseAVX > 0) { 8582 movdqu(tmp3Reg, Address(src, len, Address::times_2, -32)); 8583 movdqu(tmp4Reg, Address(src, len, Address::times_2, -16)); 8584 vpor(tmp2Reg, tmp3Reg, tmp4Reg, /* vector_len */ 0); 8585 } else { 8586 movdqu(tmp3Reg, Address(src, len, Address::times_2, -32)); 8587 por(tmp2Reg, tmp3Reg); 8588 movdqu(tmp4Reg, Address(src, len, Address::times_2, -16)); 8589 por(tmp2Reg, tmp4Reg); 8590 } 8591 ptest(tmp2Reg, tmp1Reg); // check for Unicode chars in vector 8592 jccb(Assembler::notZero, L_copy_16_chars_exit); 8593 packuswb(tmp3Reg, tmp4Reg); 8594 } 8595 movdqu(Address(dst, len, Address::times_1, -16), tmp3Reg); 8596 8597 bind(L_chars_16_check); 8598 addptr(len, 16); 8599 jcc(Assembler::lessEqual, L_copy_16_chars); 8600 8601 bind(L_copy_16_chars_exit); 8602 if (UseAVX >= 2) { 8603 // clean upper bits of YMM registers 8604 vpxor(tmp2Reg, tmp2Reg); 8605 vpxor(tmp3Reg, tmp3Reg); 8606 vpxor(tmp4Reg, tmp4Reg); 8607 movdl(tmp1Reg, tmp5); 8608 pshufd(tmp1Reg, tmp1Reg, 0); 8609 } 8610 subptr(len, 8); 8611 jccb(Assembler::greater, L_copy_8_chars_exit); 8612 8613 bind(L_copy_8_chars); 8614 movdqu(tmp3Reg, Address(src, len, Address::times_2, -16)); 8615 ptest(tmp3Reg, tmp1Reg); 8616 jccb(Assembler::notZero, L_copy_8_chars_exit); 8617 packuswb(tmp3Reg, tmp1Reg); 8618 movq(Address(dst, len, Address::times_1, -8), tmp3Reg); 8619 addptr(len, 8); 8620 jccb(Assembler::lessEqual, L_copy_8_chars); 8621 8622 bind(L_copy_8_chars_exit); 8623 subptr(len, 8); 8624 jccb(Assembler::zero, L_done); 8625 } 8626 8627 bind(L_copy_1_char); 8628 load_unsigned_short(tmp5, Address(src, len, Address::times_2, 0)); 8629 testl(tmp5, 0xff00); // check if Unicode char 8630 jccb(Assembler::notZero, L_copy_1_char_exit); 8631 movb(Address(dst, len, Address::times_1, 0), tmp5); 8632 addptr(len, 1); 8633 jccb(Assembler::less, L_copy_1_char); 8634 8635 bind(L_copy_1_char_exit); 8636 addptr(result, len); // len is negative count of not processed elements 8637 8638 bind(L_done); 8639 } 8640 8641 #ifdef _LP64 8642 /** 8643 * Helper for multiply_to_len(). 8644 */ 8645 void MacroAssembler::add2_with_carry(Register dest_hi, Register dest_lo, Register src1, Register src2) { 8646 addq(dest_lo, src1); 8647 adcq(dest_hi, 0); 8648 addq(dest_lo, src2); 8649 adcq(dest_hi, 0); 8650 } 8651 8652 /** 8653 * Multiply 64 bit by 64 bit first loop. 8654 */ 8655 void MacroAssembler::multiply_64_x_64_loop(Register x, Register xstart, Register x_xstart, 8656 Register y, Register y_idx, Register z, 8657 Register carry, Register product, 8658 Register idx, Register kdx) { 8659 // 8660 // jlong carry, x[], y[], z[]; 8661 // for (int idx=ystart, kdx=ystart+1+xstart; idx >= 0; idx-, kdx--) { 8662 // huge_128 product = y[idx] * x[xstart] + carry; 8663 // z[kdx] = (jlong)product; 8664 // carry = (jlong)(product >>> 64); 8665 // } 8666 // z[xstart] = carry; 8667 // 8668 8669 Label L_first_loop, L_first_loop_exit; 8670 Label L_one_x, L_one_y, L_multiply; 8671 8672 decrementl(xstart); 8673 jcc(Assembler::negative, L_one_x); 8674 8675 movq(x_xstart, Address(x, xstart, Address::times_4, 0)); 8676 rorq(x_xstart, 32); // convert big-endian to little-endian 8677 8678 bind(L_first_loop); 8679 decrementl(idx); 8680 jcc(Assembler::negative, L_first_loop_exit); 8681 decrementl(idx); 8682 jcc(Assembler::negative, L_one_y); 8683 movq(y_idx, Address(y, idx, Address::times_4, 0)); 8684 rorq(y_idx, 32); // convert big-endian to little-endian 8685 bind(L_multiply); 8686 movq(product, x_xstart); 8687 mulq(y_idx); // product(rax) * y_idx -> rdx:rax 8688 addq(product, carry); 8689 adcq(rdx, 0); 8690 subl(kdx, 2); 8691 movl(Address(z, kdx, Address::times_4, 4), product); 8692 shrq(product, 32); 8693 movl(Address(z, kdx, Address::times_4, 0), product); 8694 movq(carry, rdx); 8695 jmp(L_first_loop); 8696 8697 bind(L_one_y); 8698 movl(y_idx, Address(y, 0)); 8699 jmp(L_multiply); 8700 8701 bind(L_one_x); 8702 movl(x_xstart, Address(x, 0)); 8703 jmp(L_first_loop); 8704 8705 bind(L_first_loop_exit); 8706 } 8707 8708 /** 8709 * Multiply 64 bit by 64 bit and add 128 bit. 8710 */ 8711 void MacroAssembler::multiply_add_128_x_128(Register x_xstart, Register y, Register z, 8712 Register yz_idx, Register idx, 8713 Register carry, Register product, int offset) { 8714 // huge_128 product = (y[idx] * x_xstart) + z[kdx] + carry; 8715 // z[kdx] = (jlong)product; 8716 8717 movq(yz_idx, Address(y, idx, Address::times_4, offset)); 8718 rorq(yz_idx, 32); // convert big-endian to little-endian 8719 movq(product, x_xstart); 8720 mulq(yz_idx); // product(rax) * yz_idx -> rdx:product(rax) 8721 movq(yz_idx, Address(z, idx, Address::times_4, offset)); 8722 rorq(yz_idx, 32); // convert big-endian to little-endian 8723 8724 add2_with_carry(rdx, product, carry, yz_idx); 8725 8726 movl(Address(z, idx, Address::times_4, offset+4), product); 8727 shrq(product, 32); 8728 movl(Address(z, idx, Address::times_4, offset), product); 8729 8730 } 8731 8732 /** 8733 * Multiply 128 bit by 128 bit. Unrolled inner loop. 8734 */ 8735 void MacroAssembler::multiply_128_x_128_loop(Register x_xstart, Register y, Register z, 8736 Register yz_idx, Register idx, Register jdx, 8737 Register carry, Register product, 8738 Register carry2) { 8739 // jlong carry, x[], y[], z[]; 8740 // int kdx = ystart+1; 8741 // for (int idx=ystart-2; idx >= 0; idx -= 2) { // Third loop 8742 // huge_128 product = (y[idx+1] * x_xstart) + z[kdx+idx+1] + carry; 8743 // z[kdx+idx+1] = (jlong)product; 8744 // jlong carry2 = (jlong)(product >>> 64); 8745 // product = (y[idx] * x_xstart) + z[kdx+idx] + carry2; 8746 // z[kdx+idx] = (jlong)product; 8747 // carry = (jlong)(product >>> 64); 8748 // } 8749 // idx += 2; 8750 // if (idx > 0) { 8751 // product = (y[idx] * x_xstart) + z[kdx+idx] + carry; 8752 // z[kdx+idx] = (jlong)product; 8753 // carry = (jlong)(product >>> 64); 8754 // } 8755 // 8756 8757 Label L_third_loop, L_third_loop_exit, L_post_third_loop_done; 8758 8759 movl(jdx, idx); 8760 andl(jdx, 0xFFFFFFFC); 8761 shrl(jdx, 2); 8762 8763 bind(L_third_loop); 8764 subl(jdx, 1); 8765 jcc(Assembler::negative, L_third_loop_exit); 8766 subl(idx, 4); 8767 8768 multiply_add_128_x_128(x_xstart, y, z, yz_idx, idx, carry, product, 8); 8769 movq(carry2, rdx); 8770 8771 multiply_add_128_x_128(x_xstart, y, z, yz_idx, idx, carry2, product, 0); 8772 movq(carry, rdx); 8773 jmp(L_third_loop); 8774 8775 bind (L_third_loop_exit); 8776 8777 andl (idx, 0x3); 8778 jcc(Assembler::zero, L_post_third_loop_done); 8779 8780 Label L_check_1; 8781 subl(idx, 2); 8782 jcc(Assembler::negative, L_check_1); 8783 8784 multiply_add_128_x_128(x_xstart, y, z, yz_idx, idx, carry, product, 0); 8785 movq(carry, rdx); 8786 8787 bind (L_check_1); 8788 addl (idx, 0x2); 8789 andl (idx, 0x1); 8790 subl(idx, 1); 8791 jcc(Assembler::negative, L_post_third_loop_done); 8792 8793 movl(yz_idx, Address(y, idx, Address::times_4, 0)); 8794 movq(product, x_xstart); 8795 mulq(yz_idx); // product(rax) * yz_idx -> rdx:product(rax) 8796 movl(yz_idx, Address(z, idx, Address::times_4, 0)); 8797 8798 add2_with_carry(rdx, product, yz_idx, carry); 8799 8800 movl(Address(z, idx, Address::times_4, 0), product); 8801 shrq(product, 32); 8802 8803 shlq(rdx, 32); 8804 orq(product, rdx); 8805 movq(carry, product); 8806 8807 bind(L_post_third_loop_done); 8808 } 8809 8810 /** 8811 * Multiply 128 bit by 128 bit using BMI2. Unrolled inner loop. 8812 * 8813 */ 8814 void MacroAssembler::multiply_128_x_128_bmi2_loop(Register y, Register z, 8815 Register carry, Register carry2, 8816 Register idx, Register jdx, 8817 Register yz_idx1, Register yz_idx2, 8818 Register tmp, Register tmp3, Register tmp4) { 8819 assert(UseBMI2Instructions, "should be used only when BMI2 is available"); 8820 8821 // jlong carry, x[], y[], z[]; 8822 // int kdx = ystart+1; 8823 // for (int idx=ystart-2; idx >= 0; idx -= 2) { // Third loop 8824 // huge_128 tmp3 = (y[idx+1] * rdx) + z[kdx+idx+1] + carry; 8825 // jlong carry2 = (jlong)(tmp3 >>> 64); 8826 // huge_128 tmp4 = (y[idx] * rdx) + z[kdx+idx] + carry2; 8827 // carry = (jlong)(tmp4 >>> 64); 8828 // z[kdx+idx+1] = (jlong)tmp3; 8829 // z[kdx+idx] = (jlong)tmp4; 8830 // } 8831 // idx += 2; 8832 // if (idx > 0) { 8833 // yz_idx1 = (y[idx] * rdx) + z[kdx+idx] + carry; 8834 // z[kdx+idx] = (jlong)yz_idx1; 8835 // carry = (jlong)(yz_idx1 >>> 64); 8836 // } 8837 // 8838 8839 Label L_third_loop, L_third_loop_exit, L_post_third_loop_done; 8840 8841 movl(jdx, idx); 8842 andl(jdx, 0xFFFFFFFC); 8843 shrl(jdx, 2); 8844 8845 bind(L_third_loop); 8846 subl(jdx, 1); 8847 jcc(Assembler::negative, L_third_loop_exit); 8848 subl(idx, 4); 8849 8850 movq(yz_idx1, Address(y, idx, Address::times_4, 8)); 8851 rorxq(yz_idx1, yz_idx1, 32); // convert big-endian to little-endian 8852 movq(yz_idx2, Address(y, idx, Address::times_4, 0)); 8853 rorxq(yz_idx2, yz_idx2, 32); 8854 8855 mulxq(tmp4, tmp3, yz_idx1); // yz_idx1 * rdx -> tmp4:tmp3 8856 mulxq(carry2, tmp, yz_idx2); // yz_idx2 * rdx -> carry2:tmp 8857 8858 movq(yz_idx1, Address(z, idx, Address::times_4, 8)); 8859 rorxq(yz_idx1, yz_idx1, 32); 8860 movq(yz_idx2, Address(z, idx, Address::times_4, 0)); 8861 rorxq(yz_idx2, yz_idx2, 32); 8862 8863 if (VM_Version::supports_adx()) { 8864 adcxq(tmp3, carry); 8865 adoxq(tmp3, yz_idx1); 8866 8867 adcxq(tmp4, tmp); 8868 adoxq(tmp4, yz_idx2); 8869 8870 movl(carry, 0); // does not affect flags 8871 adcxq(carry2, carry); 8872 adoxq(carry2, carry); 8873 } else { 8874 add2_with_carry(tmp4, tmp3, carry, yz_idx1); 8875 add2_with_carry(carry2, tmp4, tmp, yz_idx2); 8876 } 8877 movq(carry, carry2); 8878 8879 movl(Address(z, idx, Address::times_4, 12), tmp3); 8880 shrq(tmp3, 32); 8881 movl(Address(z, idx, Address::times_4, 8), tmp3); 8882 8883 movl(Address(z, idx, Address::times_4, 4), tmp4); 8884 shrq(tmp4, 32); 8885 movl(Address(z, idx, Address::times_4, 0), tmp4); 8886 8887 jmp(L_third_loop); 8888 8889 bind (L_third_loop_exit); 8890 8891 andl (idx, 0x3); 8892 jcc(Assembler::zero, L_post_third_loop_done); 8893 8894 Label L_check_1; 8895 subl(idx, 2); 8896 jcc(Assembler::negative, L_check_1); 8897 8898 movq(yz_idx1, Address(y, idx, Address::times_4, 0)); 8899 rorxq(yz_idx1, yz_idx1, 32); 8900 mulxq(tmp4, tmp3, yz_idx1); // yz_idx1 * rdx -> tmp4:tmp3 8901 movq(yz_idx2, Address(z, idx, Address::times_4, 0)); 8902 rorxq(yz_idx2, yz_idx2, 32); 8903 8904 add2_with_carry(tmp4, tmp3, carry, yz_idx2); 8905 8906 movl(Address(z, idx, Address::times_4, 4), tmp3); 8907 shrq(tmp3, 32); 8908 movl(Address(z, idx, Address::times_4, 0), tmp3); 8909 movq(carry, tmp4); 8910 8911 bind (L_check_1); 8912 addl (idx, 0x2); 8913 andl (idx, 0x1); 8914 subl(idx, 1); 8915 jcc(Assembler::negative, L_post_third_loop_done); 8916 movl(tmp4, Address(y, idx, Address::times_4, 0)); 8917 mulxq(carry2, tmp3, tmp4); // tmp4 * rdx -> carry2:tmp3 8918 movl(tmp4, Address(z, idx, Address::times_4, 0)); 8919 8920 add2_with_carry(carry2, tmp3, tmp4, carry); 8921 8922 movl(Address(z, idx, Address::times_4, 0), tmp3); 8923 shrq(tmp3, 32); 8924 8925 shlq(carry2, 32); 8926 orq(tmp3, carry2); 8927 movq(carry, tmp3); 8928 8929 bind(L_post_third_loop_done); 8930 } 8931 8932 /** 8933 * Code for BigInteger::multiplyToLen() instrinsic. 8934 * 8935 * rdi: x 8936 * rax: xlen 8937 * rsi: y 8938 * rcx: ylen 8939 * r8: z 8940 * r11: zlen 8941 * r12: tmp1 8942 * r13: tmp2 8943 * r14: tmp3 8944 * r15: tmp4 8945 * rbx: tmp5 8946 * 8947 */ 8948 void MacroAssembler::multiply_to_len(Register x, Register xlen, Register y, Register ylen, Register z, Register zlen, 8949 Register tmp1, Register tmp2, Register tmp3, Register tmp4, Register tmp5) { 8950 ShortBranchVerifier sbv(this); 8951 assert_different_registers(x, xlen, y, ylen, z, zlen, tmp1, tmp2, tmp3, tmp4, tmp5, rdx); 8952 8953 push(tmp1); 8954 push(tmp2); 8955 push(tmp3); 8956 push(tmp4); 8957 push(tmp5); 8958 8959 push(xlen); 8960 push(zlen); 8961 8962 const Register idx = tmp1; 8963 const Register kdx = tmp2; 8964 const Register xstart = tmp3; 8965 8966 const Register y_idx = tmp4; 8967 const Register carry = tmp5; 8968 const Register product = xlen; 8969 const Register x_xstart = zlen; // reuse register 8970 8971 // First Loop. 8972 // 8973 // final static long LONG_MASK = 0xffffffffL; 8974 // int xstart = xlen - 1; 8975 // int ystart = ylen - 1; 8976 // long carry = 0; 8977 // for (int idx=ystart, kdx=ystart+1+xstart; idx >= 0; idx-, kdx--) { 8978 // long product = (y[idx] & LONG_MASK) * (x[xstart] & LONG_MASK) + carry; 8979 // z[kdx] = (int)product; 8980 // carry = product >>> 32; 8981 // } 8982 // z[xstart] = (int)carry; 8983 // 8984 8985 movl(idx, ylen); // idx = ylen; 8986 movl(kdx, zlen); // kdx = xlen+ylen; 8987 xorq(carry, carry); // carry = 0; 8988 8989 Label L_done; 8990 8991 movl(xstart, xlen); 8992 decrementl(xstart); 8993 jcc(Assembler::negative, L_done); 8994 8995 multiply_64_x_64_loop(x, xstart, x_xstart, y, y_idx, z, carry, product, idx, kdx); 8996 8997 Label L_second_loop; 8998 testl(kdx, kdx); 8999 jcc(Assembler::zero, L_second_loop); 9000 9001 Label L_carry; 9002 subl(kdx, 1); 9003 jcc(Assembler::zero, L_carry); 9004 9005 movl(Address(z, kdx, Address::times_4, 0), carry); 9006 shrq(carry, 32); 9007 subl(kdx, 1); 9008 9009 bind(L_carry); 9010 movl(Address(z, kdx, Address::times_4, 0), carry); 9011 9012 // Second and third (nested) loops. 9013 // 9014 // for (int i = xstart-1; i >= 0; i--) { // Second loop 9015 // carry = 0; 9016 // for (int jdx=ystart, k=ystart+1+i; jdx >= 0; jdx--, k--) { // Third loop 9017 // long product = (y[jdx] & LONG_MASK) * (x[i] & LONG_MASK) + 9018 // (z[k] & LONG_MASK) + carry; 9019 // z[k] = (int)product; 9020 // carry = product >>> 32; 9021 // } 9022 // z[i] = (int)carry; 9023 // } 9024 // 9025 // i = xlen, j = tmp1, k = tmp2, carry = tmp5, x[i] = rdx 9026 9027 const Register jdx = tmp1; 9028 9029 bind(L_second_loop); 9030 xorl(carry, carry); // carry = 0; 9031 movl(jdx, ylen); // j = ystart+1 9032 9033 subl(xstart, 1); // i = xstart-1; 9034 jcc(Assembler::negative, L_done); 9035 9036 push (z); 9037 9038 Label L_last_x; 9039 lea(z, Address(z, xstart, Address::times_4, 4)); // z = z + k - j 9040 subl(xstart, 1); // i = xstart-1; 9041 jcc(Assembler::negative, L_last_x); 9042 9043 if (UseBMI2Instructions) { 9044 movq(rdx, Address(x, xstart, Address::times_4, 0)); 9045 rorxq(rdx, rdx, 32); // convert big-endian to little-endian 9046 } else { 9047 movq(x_xstart, Address(x, xstart, Address::times_4, 0)); 9048 rorq(x_xstart, 32); // convert big-endian to little-endian 9049 } 9050 9051 Label L_third_loop_prologue; 9052 bind(L_third_loop_prologue); 9053 9054 push (x); 9055 push (xstart); 9056 push (ylen); 9057 9058 9059 if (UseBMI2Instructions) { 9060 multiply_128_x_128_bmi2_loop(y, z, carry, x, jdx, ylen, product, tmp2, x_xstart, tmp3, tmp4); 9061 } else { // !UseBMI2Instructions 9062 multiply_128_x_128_loop(x_xstart, y, z, y_idx, jdx, ylen, carry, product, x); 9063 } 9064 9065 pop(ylen); 9066 pop(xlen); 9067 pop(x); 9068 pop(z); 9069 9070 movl(tmp3, xlen); 9071 addl(tmp3, 1); 9072 movl(Address(z, tmp3, Address::times_4, 0), carry); 9073 subl(tmp3, 1); 9074 jccb(Assembler::negative, L_done); 9075 9076 shrq(carry, 32); 9077 movl(Address(z, tmp3, Address::times_4, 0), carry); 9078 jmp(L_second_loop); 9079 9080 // Next infrequent code is moved outside loops. 9081 bind(L_last_x); 9082 if (UseBMI2Instructions) { 9083 movl(rdx, Address(x, 0)); 9084 } else { 9085 movl(x_xstart, Address(x, 0)); 9086 } 9087 jmp(L_third_loop_prologue); 9088 9089 bind(L_done); 9090 9091 pop(zlen); 9092 pop(xlen); 9093 9094 pop(tmp5); 9095 pop(tmp4); 9096 pop(tmp3); 9097 pop(tmp2); 9098 pop(tmp1); 9099 } 9100 9101 void MacroAssembler::vectorized_mismatch(Register obja, Register objb, Register length, Register log2_array_indxscale, 9102 Register result, Register tmp1, Register tmp2, XMMRegister rymm0, XMMRegister rymm1, XMMRegister rymm2){ 9103 assert(UseSSE42Intrinsics, "SSE4.2 must be enabled."); 9104 Label VECTOR64_LOOP, VECTOR64_TAIL, VECTOR64_NOT_EQUAL, VECTOR32_TAIL; 9105 Label VECTOR32_LOOP, VECTOR16_LOOP, VECTOR8_LOOP, VECTOR4_LOOP; 9106 Label VECTOR16_TAIL, VECTOR8_TAIL, VECTOR4_TAIL; 9107 Label VECTOR32_NOT_EQUAL, VECTOR16_NOT_EQUAL, VECTOR8_NOT_EQUAL, VECTOR4_NOT_EQUAL; 9108 Label SAME_TILL_END, DONE; 9109 Label BYTES_LOOP, BYTES_TAIL, BYTES_NOT_EQUAL; 9110 9111 //scale is in rcx in both Win64 and Unix 9112 ShortBranchVerifier sbv(this); 9113 9114 shlq(length); 9115 xorq(result, result); 9116 9117 if ((UseAVX > 2) && 9118 VM_Version::supports_avx512vlbw()) { 9119 set_vector_masking(); // opening of the stub context for programming mask registers 9120 cmpq(length, 64); 9121 jcc(Assembler::less, VECTOR32_TAIL); 9122 movq(tmp1, length); 9123 andq(tmp1, 0x3F); // tail count 9124 andq(length, ~(0x3F)); //vector count 9125 9126 bind(VECTOR64_LOOP); 9127 // AVX512 code to compare 64 byte vectors. 9128 evmovdqub(rymm0, Address(obja, result), Assembler::AVX_512bit); 9129 evpcmpeqb(k7, rymm0, Address(objb, result), Assembler::AVX_512bit); 9130 kortestql(k7, k7); 9131 jcc(Assembler::aboveEqual, VECTOR64_NOT_EQUAL); // mismatch 9132 addq(result, 64); 9133 subq(length, 64); 9134 jccb(Assembler::notZero, VECTOR64_LOOP); 9135 9136 //bind(VECTOR64_TAIL); 9137 testq(tmp1, tmp1); 9138 jcc(Assembler::zero, SAME_TILL_END); 9139 9140 bind(VECTOR64_TAIL); 9141 // AVX512 code to compare upto 63 byte vectors. 9142 // Save k1 9143 kmovql(k3, k1); 9144 mov64(tmp2, 0xFFFFFFFFFFFFFFFF); 9145 shlxq(tmp2, tmp2, tmp1); 9146 notq(tmp2); 9147 kmovql(k1, tmp2); 9148 9149 evmovdqub(rymm0, k1, Address(obja, result), Assembler::AVX_512bit); 9150 evpcmpeqb(k7, k1, rymm0, Address(objb, result), Assembler::AVX_512bit); 9151 9152 ktestql(k7, k1); 9153 // Restore k1 9154 kmovql(k1, k3); 9155 jcc(Assembler::below, SAME_TILL_END); // not mismatch 9156 9157 bind(VECTOR64_NOT_EQUAL); 9158 kmovql(tmp1, k7); 9159 notq(tmp1); 9160 tzcntq(tmp1, tmp1); 9161 addq(result, tmp1); 9162 shrq(result); 9163 jmp(DONE); 9164 bind(VECTOR32_TAIL); 9165 clear_vector_masking(); // closing of the stub context for programming mask registers 9166 } 9167 9168 cmpq(length, 8); 9169 jcc(Assembler::equal, VECTOR8_LOOP); 9170 jcc(Assembler::less, VECTOR4_TAIL); 9171 9172 if (UseAVX >= 2) { 9173 9174 cmpq(length, 16); 9175 jcc(Assembler::equal, VECTOR16_LOOP); 9176 jcc(Assembler::less, VECTOR8_LOOP); 9177 9178 cmpq(length, 32); 9179 jccb(Assembler::less, VECTOR16_TAIL); 9180 9181 subq(length, 32); 9182 bind(VECTOR32_LOOP); 9183 vmovdqu(rymm0, Address(obja, result)); 9184 vmovdqu(rymm1, Address(objb, result)); 9185 vpxor(rymm2, rymm0, rymm1, Assembler::AVX_256bit); 9186 vptest(rymm2, rymm2); 9187 jcc(Assembler::notZero, VECTOR32_NOT_EQUAL);//mismatch found 9188 addq(result, 32); 9189 subq(length, 32); 9190 jccb(Assembler::greaterEqual, VECTOR32_LOOP); 9191 addq(length, 32); 9192 jcc(Assembler::equal, SAME_TILL_END); 9193 //falling through if less than 32 bytes left //close the branch here. 9194 9195 bind(VECTOR16_TAIL); 9196 cmpq(length, 16); 9197 jccb(Assembler::less, VECTOR8_TAIL); 9198 bind(VECTOR16_LOOP); 9199 movdqu(rymm0, Address(obja, result)); 9200 movdqu(rymm1, Address(objb, result)); 9201 vpxor(rymm2, rymm0, rymm1, Assembler::AVX_128bit); 9202 ptest(rymm2, rymm2); 9203 jcc(Assembler::notZero, VECTOR16_NOT_EQUAL);//mismatch found 9204 addq(result, 16); 9205 subq(length, 16); 9206 jcc(Assembler::equal, SAME_TILL_END); 9207 //falling through if less than 16 bytes left 9208 } else {//regular intrinsics 9209 9210 cmpq(length, 16); 9211 jccb(Assembler::less, VECTOR8_TAIL); 9212 9213 subq(length, 16); 9214 bind(VECTOR16_LOOP); 9215 movdqu(rymm0, Address(obja, result)); 9216 movdqu(rymm1, Address(objb, result)); 9217 pxor(rymm0, rymm1); 9218 ptest(rymm0, rymm0); 9219 jcc(Assembler::notZero, VECTOR16_NOT_EQUAL);//mismatch found 9220 addq(result, 16); 9221 subq(length, 16); 9222 jccb(Assembler::greaterEqual, VECTOR16_LOOP); 9223 addq(length, 16); 9224 jcc(Assembler::equal, SAME_TILL_END); 9225 //falling through if less than 16 bytes left 9226 } 9227 9228 bind(VECTOR8_TAIL); 9229 cmpq(length, 8); 9230 jccb(Assembler::less, VECTOR4_TAIL); 9231 bind(VECTOR8_LOOP); 9232 movq(tmp1, Address(obja, result)); 9233 movq(tmp2, Address(objb, result)); 9234 xorq(tmp1, tmp2); 9235 testq(tmp1, tmp1); 9236 jcc(Assembler::notZero, VECTOR8_NOT_EQUAL);//mismatch found 9237 addq(result, 8); 9238 subq(length, 8); 9239 jcc(Assembler::equal, SAME_TILL_END); 9240 //falling through if less than 8 bytes left 9241 9242 bind(VECTOR4_TAIL); 9243 cmpq(length, 4); 9244 jccb(Assembler::less, BYTES_TAIL); 9245 bind(VECTOR4_LOOP); 9246 movl(tmp1, Address(obja, result)); 9247 xorl(tmp1, Address(objb, result)); 9248 testl(tmp1, tmp1); 9249 jcc(Assembler::notZero, VECTOR4_NOT_EQUAL);//mismatch found 9250 addq(result, 4); 9251 subq(length, 4); 9252 jcc(Assembler::equal, SAME_TILL_END); 9253 //falling through if less than 4 bytes left 9254 9255 bind(BYTES_TAIL); 9256 bind(BYTES_LOOP); 9257 load_unsigned_byte(tmp1, Address(obja, result)); 9258 load_unsigned_byte(tmp2, Address(objb, result)); 9259 xorl(tmp1, tmp2); 9260 testl(tmp1, tmp1); 9261 jccb(Assembler::notZero, BYTES_NOT_EQUAL);//mismatch found 9262 decq(length); 9263 jccb(Assembler::zero, SAME_TILL_END); 9264 incq(result); 9265 load_unsigned_byte(tmp1, Address(obja, result)); 9266 load_unsigned_byte(tmp2, Address(objb, result)); 9267 xorl(tmp1, tmp2); 9268 testl(tmp1, tmp1); 9269 jccb(Assembler::notZero, BYTES_NOT_EQUAL);//mismatch found 9270 decq(length); 9271 jccb(Assembler::zero, SAME_TILL_END); 9272 incq(result); 9273 load_unsigned_byte(tmp1, Address(obja, result)); 9274 load_unsigned_byte(tmp2, Address(objb, result)); 9275 xorl(tmp1, tmp2); 9276 testl(tmp1, tmp1); 9277 jccb(Assembler::notZero, BYTES_NOT_EQUAL);//mismatch found 9278 jmpb(SAME_TILL_END); 9279 9280 if (UseAVX >= 2) { 9281 bind(VECTOR32_NOT_EQUAL); 9282 vpcmpeqb(rymm2, rymm2, rymm2, Assembler::AVX_256bit); 9283 vpcmpeqb(rymm0, rymm0, rymm1, Assembler::AVX_256bit); 9284 vpxor(rymm0, rymm0, rymm2, Assembler::AVX_256bit); 9285 vpmovmskb(tmp1, rymm0); 9286 bsfq(tmp1, tmp1); 9287 addq(result, tmp1); 9288 shrq(result); 9289 jmpb(DONE); 9290 } 9291 9292 bind(VECTOR16_NOT_EQUAL); 9293 if (UseAVX >= 2) { 9294 vpcmpeqb(rymm2, rymm2, rymm2, Assembler::AVX_128bit); 9295 vpcmpeqb(rymm0, rymm0, rymm1, Assembler::AVX_128bit); 9296 pxor(rymm0, rymm2); 9297 } else { 9298 pcmpeqb(rymm2, rymm2); 9299 pxor(rymm0, rymm1); 9300 pcmpeqb(rymm0, rymm1); 9301 pxor(rymm0, rymm2); 9302 } 9303 pmovmskb(tmp1, rymm0); 9304 bsfq(tmp1, tmp1); 9305 addq(result, tmp1); 9306 shrq(result); 9307 jmpb(DONE); 9308 9309 bind(VECTOR8_NOT_EQUAL); 9310 bind(VECTOR4_NOT_EQUAL); 9311 bsfq(tmp1, tmp1); 9312 shrq(tmp1, 3); 9313 addq(result, tmp1); 9314 bind(BYTES_NOT_EQUAL); 9315 shrq(result); 9316 jmpb(DONE); 9317 9318 bind(SAME_TILL_END); 9319 mov64(result, -1); 9320 9321 bind(DONE); 9322 } 9323 9324 //Helper functions for square_to_len() 9325 9326 /** 9327 * Store the squares of x[], right shifted one bit (divided by 2) into z[] 9328 * Preserves x and z and modifies rest of the registers. 9329 */ 9330 void MacroAssembler::square_rshift(Register x, Register xlen, Register z, Register tmp1, Register tmp3, Register tmp4, Register tmp5, Register rdxReg, Register raxReg) { 9331 // Perform square and right shift by 1 9332 // Handle odd xlen case first, then for even xlen do the following 9333 // jlong carry = 0; 9334 // for (int j=0, i=0; j < xlen; j+=2, i+=4) { 9335 // huge_128 product = x[j:j+1] * x[j:j+1]; 9336 // z[i:i+1] = (carry << 63) | (jlong)(product >>> 65); 9337 // z[i+2:i+3] = (jlong)(product >>> 1); 9338 // carry = (jlong)product; 9339 // } 9340 9341 xorq(tmp5, tmp5); // carry 9342 xorq(rdxReg, rdxReg); 9343 xorl(tmp1, tmp1); // index for x 9344 xorl(tmp4, tmp4); // index for z 9345 9346 Label L_first_loop, L_first_loop_exit; 9347 9348 testl(xlen, 1); 9349 jccb(Assembler::zero, L_first_loop); //jump if xlen is even 9350 9351 // Square and right shift by 1 the odd element using 32 bit multiply 9352 movl(raxReg, Address(x, tmp1, Address::times_4, 0)); 9353 imulq(raxReg, raxReg); 9354 shrq(raxReg, 1); 9355 adcq(tmp5, 0); 9356 movq(Address(z, tmp4, Address::times_4, 0), raxReg); 9357 incrementl(tmp1); 9358 addl(tmp4, 2); 9359 9360 // Square and right shift by 1 the rest using 64 bit multiply 9361 bind(L_first_loop); 9362 cmpptr(tmp1, xlen); 9363 jccb(Assembler::equal, L_first_loop_exit); 9364 9365 // Square 9366 movq(raxReg, Address(x, tmp1, Address::times_4, 0)); 9367 rorq(raxReg, 32); // convert big-endian to little-endian 9368 mulq(raxReg); // 64-bit multiply rax * rax -> rdx:rax 9369 9370 // Right shift by 1 and save carry 9371 shrq(tmp5, 1); // rdx:rax:tmp5 = (tmp5:rdx:rax) >>> 1 9372 rcrq(rdxReg, 1); 9373 rcrq(raxReg, 1); 9374 adcq(tmp5, 0); 9375 9376 // Store result in z 9377 movq(Address(z, tmp4, Address::times_4, 0), rdxReg); 9378 movq(Address(z, tmp4, Address::times_4, 8), raxReg); 9379 9380 // Update indices for x and z 9381 addl(tmp1, 2); 9382 addl(tmp4, 4); 9383 jmp(L_first_loop); 9384 9385 bind(L_first_loop_exit); 9386 } 9387 9388 9389 /** 9390 * Perform the following multiply add operation using BMI2 instructions 9391 * carry:sum = sum + op1*op2 + carry 9392 * op2 should be in rdx 9393 * op2 is preserved, all other registers are modified 9394 */ 9395 void MacroAssembler::multiply_add_64_bmi2(Register sum, Register op1, Register op2, Register carry, Register tmp2) { 9396 // assert op2 is rdx 9397 mulxq(tmp2, op1, op1); // op1 * op2 -> tmp2:op1 9398 addq(sum, carry); 9399 adcq(tmp2, 0); 9400 addq(sum, op1); 9401 adcq(tmp2, 0); 9402 movq(carry, tmp2); 9403 } 9404 9405 /** 9406 * Perform the following multiply add operation: 9407 * carry:sum = sum + op1*op2 + carry 9408 * Preserves op1, op2 and modifies rest of registers 9409 */ 9410 void MacroAssembler::multiply_add_64(Register sum, Register op1, Register op2, Register carry, Register rdxReg, Register raxReg) { 9411 // rdx:rax = op1 * op2 9412 movq(raxReg, op2); 9413 mulq(op1); 9414 9415 // rdx:rax = sum + carry + rdx:rax 9416 addq(sum, carry); 9417 adcq(rdxReg, 0); 9418 addq(sum, raxReg); 9419 adcq(rdxReg, 0); 9420 9421 // carry:sum = rdx:sum 9422 movq(carry, rdxReg); 9423 } 9424 9425 /** 9426 * Add 64 bit long carry into z[] with carry propogation. 9427 * Preserves z and carry register values and modifies rest of registers. 9428 * 9429 */ 9430 void MacroAssembler::add_one_64(Register z, Register zlen, Register carry, Register tmp1) { 9431 Label L_fourth_loop, L_fourth_loop_exit; 9432 9433 movl(tmp1, 1); 9434 subl(zlen, 2); 9435 addq(Address(z, zlen, Address::times_4, 0), carry); 9436 9437 bind(L_fourth_loop); 9438 jccb(Assembler::carryClear, L_fourth_loop_exit); 9439 subl(zlen, 2); 9440 jccb(Assembler::negative, L_fourth_loop_exit); 9441 addq(Address(z, zlen, Address::times_4, 0), tmp1); 9442 jmp(L_fourth_loop); 9443 bind(L_fourth_loop_exit); 9444 } 9445 9446 /** 9447 * Shift z[] left by 1 bit. 9448 * Preserves x, len, z and zlen registers and modifies rest of the registers. 9449 * 9450 */ 9451 void MacroAssembler::lshift_by_1(Register x, Register len, Register z, Register zlen, Register tmp1, Register tmp2, Register tmp3, Register tmp4) { 9452 9453 Label L_fifth_loop, L_fifth_loop_exit; 9454 9455 // Fifth loop 9456 // Perform primitiveLeftShift(z, zlen, 1) 9457 9458 const Register prev_carry = tmp1; 9459 const Register new_carry = tmp4; 9460 const Register value = tmp2; 9461 const Register zidx = tmp3; 9462 9463 // int zidx, carry; 9464 // long value; 9465 // carry = 0; 9466 // for (zidx = zlen-2; zidx >=0; zidx -= 2) { 9467 // (carry:value) = (z[i] << 1) | carry ; 9468 // z[i] = value; 9469 // } 9470 9471 movl(zidx, zlen); 9472 xorl(prev_carry, prev_carry); // clear carry flag and prev_carry register 9473 9474 bind(L_fifth_loop); 9475 decl(zidx); // Use decl to preserve carry flag 9476 decl(zidx); 9477 jccb(Assembler::negative, L_fifth_loop_exit); 9478 9479 if (UseBMI2Instructions) { 9480 movq(value, Address(z, zidx, Address::times_4, 0)); 9481 rclq(value, 1); 9482 rorxq(value, value, 32); 9483 movq(Address(z, zidx, Address::times_4, 0), value); // Store back in big endian form 9484 } 9485 else { 9486 // clear new_carry 9487 xorl(new_carry, new_carry); 9488 9489 // Shift z[i] by 1, or in previous carry and save new carry 9490 movq(value, Address(z, zidx, Address::times_4, 0)); 9491 shlq(value, 1); 9492 adcl(new_carry, 0); 9493 9494 orq(value, prev_carry); 9495 rorq(value, 0x20); 9496 movq(Address(z, zidx, Address::times_4, 0), value); // Store back in big endian form 9497 9498 // Set previous carry = new carry 9499 movl(prev_carry, new_carry); 9500 } 9501 jmp(L_fifth_loop); 9502 9503 bind(L_fifth_loop_exit); 9504 } 9505 9506 9507 /** 9508 * Code for BigInteger::squareToLen() intrinsic 9509 * 9510 * rdi: x 9511 * rsi: len 9512 * r8: z 9513 * rcx: zlen 9514 * r12: tmp1 9515 * r13: tmp2 9516 * r14: tmp3 9517 * r15: tmp4 9518 * rbx: tmp5 9519 * 9520 */ 9521 void MacroAssembler::square_to_len(Register x, Register len, Register z, Register zlen, Register tmp1, Register tmp2, Register tmp3, Register tmp4, Register tmp5, Register rdxReg, Register raxReg) { 9522 9523 Label L_second_loop, L_second_loop_exit, L_third_loop, L_third_loop_exit, fifth_loop, fifth_loop_exit, L_last_x, L_multiply; 9524 push(tmp1); 9525 push(tmp2); 9526 push(tmp3); 9527 push(tmp4); 9528 push(tmp5); 9529 9530 // First loop 9531 // Store the squares, right shifted one bit (i.e., divided by 2). 9532 square_rshift(x, len, z, tmp1, tmp3, tmp4, tmp5, rdxReg, raxReg); 9533 9534 // Add in off-diagonal sums. 9535 // 9536 // Second, third (nested) and fourth loops. 9537 // zlen +=2; 9538 // for (int xidx=len-2,zidx=zlen-4; xidx > 0; xidx-=2,zidx-=4) { 9539 // carry = 0; 9540 // long op2 = x[xidx:xidx+1]; 9541 // for (int j=xidx-2,k=zidx; j >= 0; j-=2) { 9542 // k -= 2; 9543 // long op1 = x[j:j+1]; 9544 // long sum = z[k:k+1]; 9545 // carry:sum = multiply_add_64(sum, op1, op2, carry, tmp_regs); 9546 // z[k:k+1] = sum; 9547 // } 9548 // add_one_64(z, k, carry, tmp_regs); 9549 // } 9550 9551 const Register carry = tmp5; 9552 const Register sum = tmp3; 9553 const Register op1 = tmp4; 9554 Register op2 = tmp2; 9555 9556 push(zlen); 9557 push(len); 9558 addl(zlen,2); 9559 bind(L_second_loop); 9560 xorq(carry, carry); 9561 subl(zlen, 4); 9562 subl(len, 2); 9563 push(zlen); 9564 push(len); 9565 cmpl(len, 0); 9566 jccb(Assembler::lessEqual, L_second_loop_exit); 9567 9568 // Multiply an array by one 64 bit long. 9569 if (UseBMI2Instructions) { 9570 op2 = rdxReg; 9571 movq(op2, Address(x, len, Address::times_4, 0)); 9572 rorxq(op2, op2, 32); 9573 } 9574 else { 9575 movq(op2, Address(x, len, Address::times_4, 0)); 9576 rorq(op2, 32); 9577 } 9578 9579 bind(L_third_loop); 9580 decrementl(len); 9581 jccb(Assembler::negative, L_third_loop_exit); 9582 decrementl(len); 9583 jccb(Assembler::negative, L_last_x); 9584 9585 movq(op1, Address(x, len, Address::times_4, 0)); 9586 rorq(op1, 32); 9587 9588 bind(L_multiply); 9589 subl(zlen, 2); 9590 movq(sum, Address(z, zlen, Address::times_4, 0)); 9591 9592 // Multiply 64 bit by 64 bit and add 64 bits lower half and upper 64 bits as carry. 9593 if (UseBMI2Instructions) { 9594 multiply_add_64_bmi2(sum, op1, op2, carry, tmp2); 9595 } 9596 else { 9597 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg); 9598 } 9599 9600 movq(Address(z, zlen, Address::times_4, 0), sum); 9601 9602 jmp(L_third_loop); 9603 bind(L_third_loop_exit); 9604 9605 // Fourth loop 9606 // Add 64 bit long carry into z with carry propogation. 9607 // Uses offsetted zlen. 9608 add_one_64(z, zlen, carry, tmp1); 9609 9610 pop(len); 9611 pop(zlen); 9612 jmp(L_second_loop); 9613 9614 // Next infrequent code is moved outside loops. 9615 bind(L_last_x); 9616 movl(op1, Address(x, 0)); 9617 jmp(L_multiply); 9618 9619 bind(L_second_loop_exit); 9620 pop(len); 9621 pop(zlen); 9622 pop(len); 9623 pop(zlen); 9624 9625 // Fifth loop 9626 // Shift z left 1 bit. 9627 lshift_by_1(x, len, z, zlen, tmp1, tmp2, tmp3, tmp4); 9628 9629 // z[zlen-1] |= x[len-1] & 1; 9630 movl(tmp3, Address(x, len, Address::times_4, -4)); 9631 andl(tmp3, 1); 9632 orl(Address(z, zlen, Address::times_4, -4), tmp3); 9633 9634 pop(tmp5); 9635 pop(tmp4); 9636 pop(tmp3); 9637 pop(tmp2); 9638 pop(tmp1); 9639 } 9640 9641 /** 9642 * Helper function for mul_add() 9643 * Multiply the in[] by int k and add to out[] starting at offset offs using 9644 * 128 bit by 32 bit multiply and return the carry in tmp5. 9645 * Only quad int aligned length of in[] is operated on in this function. 9646 * k is in rdxReg for BMI2Instructions, for others it is in tmp2. 9647 * This function preserves out, in and k registers. 9648 * len and offset point to the appropriate index in "in" & "out" correspondingly 9649 * tmp5 has the carry. 9650 * other registers are temporary and are modified. 9651 * 9652 */ 9653 void MacroAssembler::mul_add_128_x_32_loop(Register out, Register in, 9654 Register offset, Register len, Register tmp1, Register tmp2, Register tmp3, 9655 Register tmp4, Register tmp5, Register rdxReg, Register raxReg) { 9656 9657 Label L_first_loop, L_first_loop_exit; 9658 9659 movl(tmp1, len); 9660 shrl(tmp1, 2); 9661 9662 bind(L_first_loop); 9663 subl(tmp1, 1); 9664 jccb(Assembler::negative, L_first_loop_exit); 9665 9666 subl(len, 4); 9667 subl(offset, 4); 9668 9669 Register op2 = tmp2; 9670 const Register sum = tmp3; 9671 const Register op1 = tmp4; 9672 const Register carry = tmp5; 9673 9674 if (UseBMI2Instructions) { 9675 op2 = rdxReg; 9676 } 9677 9678 movq(op1, Address(in, len, Address::times_4, 8)); 9679 rorq(op1, 32); 9680 movq(sum, Address(out, offset, Address::times_4, 8)); 9681 rorq(sum, 32); 9682 if (UseBMI2Instructions) { 9683 multiply_add_64_bmi2(sum, op1, op2, carry, raxReg); 9684 } 9685 else { 9686 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg); 9687 } 9688 // Store back in big endian from little endian 9689 rorq(sum, 0x20); 9690 movq(Address(out, offset, Address::times_4, 8), sum); 9691 9692 movq(op1, Address(in, len, Address::times_4, 0)); 9693 rorq(op1, 32); 9694 movq(sum, Address(out, offset, Address::times_4, 0)); 9695 rorq(sum, 32); 9696 if (UseBMI2Instructions) { 9697 multiply_add_64_bmi2(sum, op1, op2, carry, raxReg); 9698 } 9699 else { 9700 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg); 9701 } 9702 // Store back in big endian from little endian 9703 rorq(sum, 0x20); 9704 movq(Address(out, offset, Address::times_4, 0), sum); 9705 9706 jmp(L_first_loop); 9707 bind(L_first_loop_exit); 9708 } 9709 9710 /** 9711 * Code for BigInteger::mulAdd() intrinsic 9712 * 9713 * rdi: out 9714 * rsi: in 9715 * r11: offs (out.length - offset) 9716 * rcx: len 9717 * r8: k 9718 * r12: tmp1 9719 * r13: tmp2 9720 * r14: tmp3 9721 * r15: tmp4 9722 * rbx: tmp5 9723 * Multiply the in[] by word k and add to out[], return the carry in rax 9724 */ 9725 void MacroAssembler::mul_add(Register out, Register in, Register offs, 9726 Register len, Register k, Register tmp1, Register tmp2, Register tmp3, 9727 Register tmp4, Register tmp5, Register rdxReg, Register raxReg) { 9728 9729 Label L_carry, L_last_in, L_done; 9730 9731 // carry = 0; 9732 // for (int j=len-1; j >= 0; j--) { 9733 // long product = (in[j] & LONG_MASK) * kLong + 9734 // (out[offs] & LONG_MASK) + carry; 9735 // out[offs--] = (int)product; 9736 // carry = product >>> 32; 9737 // } 9738 // 9739 push(tmp1); 9740 push(tmp2); 9741 push(tmp3); 9742 push(tmp4); 9743 push(tmp5); 9744 9745 Register op2 = tmp2; 9746 const Register sum = tmp3; 9747 const Register op1 = tmp4; 9748 const Register carry = tmp5; 9749 9750 if (UseBMI2Instructions) { 9751 op2 = rdxReg; 9752 movl(op2, k); 9753 } 9754 else { 9755 movl(op2, k); 9756 } 9757 9758 xorq(carry, carry); 9759 9760 //First loop 9761 9762 //Multiply in[] by k in a 4 way unrolled loop using 128 bit by 32 bit multiply 9763 //The carry is in tmp5 9764 mul_add_128_x_32_loop(out, in, offs, len, tmp1, tmp2, tmp3, tmp4, tmp5, rdxReg, raxReg); 9765 9766 //Multiply the trailing in[] entry using 64 bit by 32 bit, if any 9767 decrementl(len); 9768 jccb(Assembler::negative, L_carry); 9769 decrementl(len); 9770 jccb(Assembler::negative, L_last_in); 9771 9772 movq(op1, Address(in, len, Address::times_4, 0)); 9773 rorq(op1, 32); 9774 9775 subl(offs, 2); 9776 movq(sum, Address(out, offs, Address::times_4, 0)); 9777 rorq(sum, 32); 9778 9779 if (UseBMI2Instructions) { 9780 multiply_add_64_bmi2(sum, op1, op2, carry, raxReg); 9781 } 9782 else { 9783 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg); 9784 } 9785 9786 // Store back in big endian from little endian 9787 rorq(sum, 0x20); 9788 movq(Address(out, offs, Address::times_4, 0), sum); 9789 9790 testl(len, len); 9791 jccb(Assembler::zero, L_carry); 9792 9793 //Multiply the last in[] entry, if any 9794 bind(L_last_in); 9795 movl(op1, Address(in, 0)); 9796 movl(sum, Address(out, offs, Address::times_4, -4)); 9797 9798 movl(raxReg, k); 9799 mull(op1); //tmp4 * eax -> edx:eax 9800 addl(sum, carry); 9801 adcl(rdxReg, 0); 9802 addl(sum, raxReg); 9803 adcl(rdxReg, 0); 9804 movl(carry, rdxReg); 9805 9806 movl(Address(out, offs, Address::times_4, -4), sum); 9807 9808 bind(L_carry); 9809 //return tmp5/carry as carry in rax 9810 movl(rax, carry); 9811 9812 bind(L_done); 9813 pop(tmp5); 9814 pop(tmp4); 9815 pop(tmp3); 9816 pop(tmp2); 9817 pop(tmp1); 9818 } 9819 #endif 9820 9821 /** 9822 * Emits code to update CRC-32 with a byte value according to constants in table 9823 * 9824 * @param [in,out]crc Register containing the crc. 9825 * @param [in]val Register containing the byte to fold into the CRC. 9826 * @param [in]table Register containing the table of crc constants. 9827 * 9828 * uint32_t crc; 9829 * val = crc_table[(val ^ crc) & 0xFF]; 9830 * crc = val ^ (crc >> 8); 9831 * 9832 */ 9833 void MacroAssembler::update_byte_crc32(Register crc, Register val, Register table) { 9834 xorl(val, crc); 9835 andl(val, 0xFF); 9836 shrl(crc, 8); // unsigned shift 9837 xorl(crc, Address(table, val, Address::times_4, 0)); 9838 } 9839 9840 /** 9841 * Fold four 128-bit data chunks 9842 */ 9843 void MacroAssembler::fold_128bit_crc32_avx512(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, Register buf, int offset) { 9844 evpclmulhdq(xtmp, xK, xcrc, Assembler::AVX_512bit); // [123:64] 9845 evpclmulldq(xcrc, xK, xcrc, Assembler::AVX_512bit); // [63:0] 9846 evpxorq(xcrc, xcrc, Address(buf, offset), Assembler::AVX_512bit /* vector_len */); 9847 evpxorq(xcrc, xcrc, xtmp, Assembler::AVX_512bit /* vector_len */); 9848 } 9849 9850 /** 9851 * Fold 128-bit data chunk 9852 */ 9853 void MacroAssembler::fold_128bit_crc32(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, Register buf, int offset) { 9854 if (UseAVX > 0) { 9855 vpclmulhdq(xtmp, xK, xcrc); // [123:64] 9856 vpclmulldq(xcrc, xK, xcrc); // [63:0] 9857 vpxor(xcrc, xcrc, Address(buf, offset), 0 /* vector_len */); 9858 pxor(xcrc, xtmp); 9859 } else { 9860 movdqa(xtmp, xcrc); 9861 pclmulhdq(xtmp, xK); // [123:64] 9862 pclmulldq(xcrc, xK); // [63:0] 9863 pxor(xcrc, xtmp); 9864 movdqu(xtmp, Address(buf, offset)); 9865 pxor(xcrc, xtmp); 9866 } 9867 } 9868 9869 void MacroAssembler::fold_128bit_crc32(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, XMMRegister xbuf) { 9870 if (UseAVX > 0) { 9871 vpclmulhdq(xtmp, xK, xcrc); 9872 vpclmulldq(xcrc, xK, xcrc); 9873 pxor(xcrc, xbuf); 9874 pxor(xcrc, xtmp); 9875 } else { 9876 movdqa(xtmp, xcrc); 9877 pclmulhdq(xtmp, xK); 9878 pclmulldq(xcrc, xK); 9879 pxor(xcrc, xbuf); 9880 pxor(xcrc, xtmp); 9881 } 9882 } 9883 9884 /** 9885 * 8-bit folds to compute 32-bit CRC 9886 * 9887 * uint64_t xcrc; 9888 * timesXtoThe32[xcrc & 0xFF] ^ (xcrc >> 8); 9889 */ 9890 void MacroAssembler::fold_8bit_crc32(XMMRegister xcrc, Register table, XMMRegister xtmp, Register tmp) { 9891 movdl(tmp, xcrc); 9892 andl(tmp, 0xFF); 9893 movdl(xtmp, Address(table, tmp, Address::times_4, 0)); 9894 psrldq(xcrc, 1); // unsigned shift one byte 9895 pxor(xcrc, xtmp); 9896 } 9897 9898 /** 9899 * uint32_t crc; 9900 * timesXtoThe32[crc & 0xFF] ^ (crc >> 8); 9901 */ 9902 void MacroAssembler::fold_8bit_crc32(Register crc, Register table, Register tmp) { 9903 movl(tmp, crc); 9904 andl(tmp, 0xFF); 9905 shrl(crc, 8); 9906 xorl(crc, Address(table, tmp, Address::times_4, 0)); 9907 } 9908 9909 /** 9910 * @param crc register containing existing CRC (32-bit) 9911 * @param buf register pointing to input byte buffer (byte*) 9912 * @param len register containing number of bytes 9913 * @param table register that will contain address of CRC table 9914 * @param tmp scratch register 9915 */ 9916 void MacroAssembler::kernel_crc32(Register crc, Register buf, Register len, Register table, Register tmp) { 9917 assert_different_registers(crc, buf, len, table, tmp, rax); 9918 9919 Label L_tail, L_tail_restore, L_tail_loop, L_exit, L_align_loop, L_aligned; 9920 Label L_fold_tail, L_fold_128b, L_fold_512b, L_fold_512b_loop, L_fold_tail_loop; 9921 9922 // For EVEX with VL and BW, provide a standard mask, VL = 128 will guide the merge 9923 // context for the registers used, where all instructions below are using 128-bit mode 9924 // On EVEX without VL and BW, these instructions will all be AVX. 9925 if (VM_Version::supports_avx512vlbw()) { 9926 movl(tmp, 0xffff); 9927 kmovwl(k1, tmp); 9928 } 9929 9930 lea(table, ExternalAddress(StubRoutines::crc_table_addr())); 9931 notl(crc); // ~crc 9932 cmpl(len, 16); 9933 jcc(Assembler::less, L_tail); 9934 9935 // Align buffer to 16 bytes 9936 movl(tmp, buf); 9937 andl(tmp, 0xF); 9938 jccb(Assembler::zero, L_aligned); 9939 subl(tmp, 16); 9940 addl(len, tmp); 9941 9942 align(4); 9943 BIND(L_align_loop); 9944 movsbl(rax, Address(buf, 0)); // load byte with sign extension 9945 update_byte_crc32(crc, rax, table); 9946 increment(buf); 9947 incrementl(tmp); 9948 jccb(Assembler::less, L_align_loop); 9949 9950 BIND(L_aligned); 9951 movl(tmp, len); // save 9952 shrl(len, 4); 9953 jcc(Assembler::zero, L_tail_restore); 9954 9955 // Fold total 512 bits of polynomial on each iteration 9956 if (VM_Version::supports_vpclmulqdq()) { 9957 Label Parallel_loop, L_No_Parallel; 9958 9959 cmpl(len, 8); 9960 jccb(Assembler::less, L_No_Parallel); 9961 9962 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 32)); 9963 evmovdquq(xmm1, Address(buf, 0), Assembler::AVX_512bit); 9964 movdl(xmm5, crc); 9965 evpxorq(xmm1, xmm1, xmm5, Assembler::AVX_512bit); 9966 addptr(buf, 64); 9967 subl(len, 7); 9968 evshufi64x2(xmm0, xmm0, xmm0, 0x00, Assembler::AVX_512bit); //propagate the mask from 128 bits to 512 bits 9969 9970 BIND(Parallel_loop); 9971 fold_128bit_crc32_avx512(xmm1, xmm0, xmm5, buf, 0); 9972 addptr(buf, 64); 9973 subl(len, 4); 9974 jcc(Assembler::greater, Parallel_loop); 9975 9976 vextracti64x2(xmm2, xmm1, 0x01); 9977 vextracti64x2(xmm3, xmm1, 0x02); 9978 vextracti64x2(xmm4, xmm1, 0x03); 9979 jmp(L_fold_512b); 9980 9981 BIND(L_No_Parallel); 9982 } 9983 // Fold crc into first bytes of vector 9984 movdqa(xmm1, Address(buf, 0)); 9985 movdl(rax, xmm1); 9986 xorl(crc, rax); 9987 if (VM_Version::supports_sse4_1()) { 9988 pinsrd(xmm1, crc, 0); 9989 } else { 9990 pinsrw(xmm1, crc, 0); 9991 shrl(crc, 16); 9992 pinsrw(xmm1, crc, 1); 9993 } 9994 addptr(buf, 16); 9995 subl(len, 4); // len > 0 9996 jcc(Assembler::less, L_fold_tail); 9997 9998 movdqa(xmm2, Address(buf, 0)); 9999 movdqa(xmm3, Address(buf, 16)); 10000 movdqa(xmm4, Address(buf, 32)); 10001 addptr(buf, 48); 10002 subl(len, 3); 10003 jcc(Assembler::lessEqual, L_fold_512b); 10004 10005 // Fold total 512 bits of polynomial on each iteration, 10006 // 128 bits per each of 4 parallel streams. 10007 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 32)); 10008 10009 align(32); 10010 BIND(L_fold_512b_loop); 10011 fold_128bit_crc32(xmm1, xmm0, xmm5, buf, 0); 10012 fold_128bit_crc32(xmm2, xmm0, xmm5, buf, 16); 10013 fold_128bit_crc32(xmm3, xmm0, xmm5, buf, 32); 10014 fold_128bit_crc32(xmm4, xmm0, xmm5, buf, 48); 10015 addptr(buf, 64); 10016 subl(len, 4); 10017 jcc(Assembler::greater, L_fold_512b_loop); 10018 10019 // Fold 512 bits to 128 bits. 10020 BIND(L_fold_512b); 10021 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 16)); 10022 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm2); 10023 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm3); 10024 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm4); 10025 10026 // Fold the rest of 128 bits data chunks 10027 BIND(L_fold_tail); 10028 addl(len, 3); 10029 jccb(Assembler::lessEqual, L_fold_128b); 10030 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 16)); 10031 10032 BIND(L_fold_tail_loop); 10033 fold_128bit_crc32(xmm1, xmm0, xmm5, buf, 0); 10034 addptr(buf, 16); 10035 decrementl(len); 10036 jccb(Assembler::greater, L_fold_tail_loop); 10037 10038 // Fold 128 bits in xmm1 down into 32 bits in crc register. 10039 BIND(L_fold_128b); 10040 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr())); 10041 if (UseAVX > 0) { 10042 vpclmulqdq(xmm2, xmm0, xmm1, 0x1); 10043 vpand(xmm3, xmm0, xmm2, 0 /* vector_len */); 10044 vpclmulqdq(xmm0, xmm0, xmm3, 0x1); 10045 } else { 10046 movdqa(xmm2, xmm0); 10047 pclmulqdq(xmm2, xmm1, 0x1); 10048 movdqa(xmm3, xmm0); 10049 pand(xmm3, xmm2); 10050 pclmulqdq(xmm0, xmm3, 0x1); 10051 } 10052 psrldq(xmm1, 8); 10053 psrldq(xmm2, 4); 10054 pxor(xmm0, xmm1); 10055 pxor(xmm0, xmm2); 10056 10057 // 8 8-bit folds to compute 32-bit CRC. 10058 for (int j = 0; j < 4; j++) { 10059 fold_8bit_crc32(xmm0, table, xmm1, rax); 10060 } 10061 movdl(crc, xmm0); // mov 32 bits to general register 10062 for (int j = 0; j < 4; j++) { 10063 fold_8bit_crc32(crc, table, rax); 10064 } 10065 10066 BIND(L_tail_restore); 10067 movl(len, tmp); // restore 10068 BIND(L_tail); 10069 andl(len, 0xf); 10070 jccb(Assembler::zero, L_exit); 10071 10072 // Fold the rest of bytes 10073 align(4); 10074 BIND(L_tail_loop); 10075 movsbl(rax, Address(buf, 0)); // load byte with sign extension 10076 update_byte_crc32(crc, rax, table); 10077 increment(buf); 10078 decrementl(len); 10079 jccb(Assembler::greater, L_tail_loop); 10080 10081 BIND(L_exit); 10082 notl(crc); // ~c 10083 } 10084 10085 #ifdef _LP64 10086 // S. Gueron / Information Processing Letters 112 (2012) 184 10087 // Algorithm 4: Computing carry-less multiplication using a precomputed lookup table. 10088 // Input: A 32 bit value B = [byte3, byte2, byte1, byte0]. 10089 // Output: the 64-bit carry-less product of B * CONST 10090 void MacroAssembler::crc32c_ipl_alg4(Register in, uint32_t n, 10091 Register tmp1, Register tmp2, Register tmp3) { 10092 lea(tmp3, ExternalAddress(StubRoutines::crc32c_table_addr())); 10093 if (n > 0) { 10094 addq(tmp3, n * 256 * 8); 10095 } 10096 // Q1 = TABLEExt[n][B & 0xFF]; 10097 movl(tmp1, in); 10098 andl(tmp1, 0x000000FF); 10099 shll(tmp1, 3); 10100 addq(tmp1, tmp3); 10101 movq(tmp1, Address(tmp1, 0)); 10102 10103 // Q2 = TABLEExt[n][B >> 8 & 0xFF]; 10104 movl(tmp2, in); 10105 shrl(tmp2, 8); 10106 andl(tmp2, 0x000000FF); 10107 shll(tmp2, 3); 10108 addq(tmp2, tmp3); 10109 movq(tmp2, Address(tmp2, 0)); 10110 10111 shlq(tmp2, 8); 10112 xorq(tmp1, tmp2); 10113 10114 // Q3 = TABLEExt[n][B >> 16 & 0xFF]; 10115 movl(tmp2, in); 10116 shrl(tmp2, 16); 10117 andl(tmp2, 0x000000FF); 10118 shll(tmp2, 3); 10119 addq(tmp2, tmp3); 10120 movq(tmp2, Address(tmp2, 0)); 10121 10122 shlq(tmp2, 16); 10123 xorq(tmp1, tmp2); 10124 10125 // Q4 = TABLEExt[n][B >> 24 & 0xFF]; 10126 shrl(in, 24); 10127 andl(in, 0x000000FF); 10128 shll(in, 3); 10129 addq(in, tmp3); 10130 movq(in, Address(in, 0)); 10131 10132 shlq(in, 24); 10133 xorq(in, tmp1); 10134 // return Q1 ^ Q2 << 8 ^ Q3 << 16 ^ Q4 << 24; 10135 } 10136 10137 void MacroAssembler::crc32c_pclmulqdq(XMMRegister w_xtmp1, 10138 Register in_out, 10139 uint32_t const_or_pre_comp_const_index, bool is_pclmulqdq_supported, 10140 XMMRegister w_xtmp2, 10141 Register tmp1, 10142 Register n_tmp2, Register n_tmp3) { 10143 if (is_pclmulqdq_supported) { 10144 movdl(w_xtmp1, in_out); // modified blindly 10145 10146 movl(tmp1, const_or_pre_comp_const_index); 10147 movdl(w_xtmp2, tmp1); 10148 pclmulqdq(w_xtmp1, w_xtmp2, 0); 10149 10150 movdq(in_out, w_xtmp1); 10151 } else { 10152 crc32c_ipl_alg4(in_out, const_or_pre_comp_const_index, tmp1, n_tmp2, n_tmp3); 10153 } 10154 } 10155 10156 // Recombination Alternative 2: No bit-reflections 10157 // T1 = (CRC_A * U1) << 1 10158 // T2 = (CRC_B * U2) << 1 10159 // C1 = T1 >> 32 10160 // C2 = T2 >> 32 10161 // T1 = T1 & 0xFFFFFFFF 10162 // T2 = T2 & 0xFFFFFFFF 10163 // T1 = CRC32(0, T1) 10164 // T2 = CRC32(0, T2) 10165 // C1 = C1 ^ T1 10166 // C2 = C2 ^ T2 10167 // CRC = C1 ^ C2 ^ CRC_C 10168 void MacroAssembler::crc32c_rec_alt2(uint32_t const_or_pre_comp_const_index_u1, uint32_t const_or_pre_comp_const_index_u2, bool is_pclmulqdq_supported, Register in_out, Register in1, Register in2, 10169 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3, 10170 Register tmp1, Register tmp2, 10171 Register n_tmp3) { 10172 crc32c_pclmulqdq(w_xtmp1, in_out, const_or_pre_comp_const_index_u1, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3); 10173 crc32c_pclmulqdq(w_xtmp2, in1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3); 10174 shlq(in_out, 1); 10175 movl(tmp1, in_out); 10176 shrq(in_out, 32); 10177 xorl(tmp2, tmp2); 10178 crc32(tmp2, tmp1, 4); 10179 xorl(in_out, tmp2); // we don't care about upper 32 bit contents here 10180 shlq(in1, 1); 10181 movl(tmp1, in1); 10182 shrq(in1, 32); 10183 xorl(tmp2, tmp2); 10184 crc32(tmp2, tmp1, 4); 10185 xorl(in1, tmp2); 10186 xorl(in_out, in1); 10187 xorl(in_out, in2); 10188 } 10189 10190 // Set N to predefined value 10191 // Subtract from a lenght of a buffer 10192 // execute in a loop: 10193 // CRC_A = 0xFFFFFFFF, CRC_B = 0, CRC_C = 0 10194 // for i = 1 to N do 10195 // CRC_A = CRC32(CRC_A, A[i]) 10196 // CRC_B = CRC32(CRC_B, B[i]) 10197 // CRC_C = CRC32(CRC_C, C[i]) 10198 // end for 10199 // Recombine 10200 void MacroAssembler::crc32c_proc_chunk(uint32_t size, uint32_t const_or_pre_comp_const_index_u1, uint32_t const_or_pre_comp_const_index_u2, bool is_pclmulqdq_supported, 10201 Register in_out1, Register in_out2, Register in_out3, 10202 Register tmp1, Register tmp2, Register tmp3, 10203 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3, 10204 Register tmp4, Register tmp5, 10205 Register n_tmp6) { 10206 Label L_processPartitions; 10207 Label L_processPartition; 10208 Label L_exit; 10209 10210 bind(L_processPartitions); 10211 cmpl(in_out1, 3 * size); 10212 jcc(Assembler::less, L_exit); 10213 xorl(tmp1, tmp1); 10214 xorl(tmp2, tmp2); 10215 movq(tmp3, in_out2); 10216 addq(tmp3, size); 10217 10218 bind(L_processPartition); 10219 crc32(in_out3, Address(in_out2, 0), 8); 10220 crc32(tmp1, Address(in_out2, size), 8); 10221 crc32(tmp2, Address(in_out2, size * 2), 8); 10222 addq(in_out2, 8); 10223 cmpq(in_out2, tmp3); 10224 jcc(Assembler::less, L_processPartition); 10225 crc32c_rec_alt2(const_or_pre_comp_const_index_u1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, in_out3, tmp1, tmp2, 10226 w_xtmp1, w_xtmp2, w_xtmp3, 10227 tmp4, tmp5, 10228 n_tmp6); 10229 addq(in_out2, 2 * size); 10230 subl(in_out1, 3 * size); 10231 jmp(L_processPartitions); 10232 10233 bind(L_exit); 10234 } 10235 #else 10236 void MacroAssembler::crc32c_ipl_alg4(Register in_out, uint32_t n, 10237 Register tmp1, Register tmp2, Register tmp3, 10238 XMMRegister xtmp1, XMMRegister xtmp2) { 10239 lea(tmp3, ExternalAddress(StubRoutines::crc32c_table_addr())); 10240 if (n > 0) { 10241 addl(tmp3, n * 256 * 8); 10242 } 10243 // Q1 = TABLEExt[n][B & 0xFF]; 10244 movl(tmp1, in_out); 10245 andl(tmp1, 0x000000FF); 10246 shll(tmp1, 3); 10247 addl(tmp1, tmp3); 10248 movq(xtmp1, Address(tmp1, 0)); 10249 10250 // Q2 = TABLEExt[n][B >> 8 & 0xFF]; 10251 movl(tmp2, in_out); 10252 shrl(tmp2, 8); 10253 andl(tmp2, 0x000000FF); 10254 shll(tmp2, 3); 10255 addl(tmp2, tmp3); 10256 movq(xtmp2, Address(tmp2, 0)); 10257 10258 psllq(xtmp2, 8); 10259 pxor(xtmp1, xtmp2); 10260 10261 // Q3 = TABLEExt[n][B >> 16 & 0xFF]; 10262 movl(tmp2, in_out); 10263 shrl(tmp2, 16); 10264 andl(tmp2, 0x000000FF); 10265 shll(tmp2, 3); 10266 addl(tmp2, tmp3); 10267 movq(xtmp2, Address(tmp2, 0)); 10268 10269 psllq(xtmp2, 16); 10270 pxor(xtmp1, xtmp2); 10271 10272 // Q4 = TABLEExt[n][B >> 24 & 0xFF]; 10273 shrl(in_out, 24); 10274 andl(in_out, 0x000000FF); 10275 shll(in_out, 3); 10276 addl(in_out, tmp3); 10277 movq(xtmp2, Address(in_out, 0)); 10278 10279 psllq(xtmp2, 24); 10280 pxor(xtmp1, xtmp2); // Result in CXMM 10281 // return Q1 ^ Q2 << 8 ^ Q3 << 16 ^ Q4 << 24; 10282 } 10283 10284 void MacroAssembler::crc32c_pclmulqdq(XMMRegister w_xtmp1, 10285 Register in_out, 10286 uint32_t const_or_pre_comp_const_index, bool is_pclmulqdq_supported, 10287 XMMRegister w_xtmp2, 10288 Register tmp1, 10289 Register n_tmp2, Register n_tmp3) { 10290 if (is_pclmulqdq_supported) { 10291 movdl(w_xtmp1, in_out); 10292 10293 movl(tmp1, const_or_pre_comp_const_index); 10294 movdl(w_xtmp2, tmp1); 10295 pclmulqdq(w_xtmp1, w_xtmp2, 0); 10296 // Keep result in XMM since GPR is 32 bit in length 10297 } else { 10298 crc32c_ipl_alg4(in_out, const_or_pre_comp_const_index, tmp1, n_tmp2, n_tmp3, w_xtmp1, w_xtmp2); 10299 } 10300 } 10301 10302 void MacroAssembler::crc32c_rec_alt2(uint32_t const_or_pre_comp_const_index_u1, uint32_t const_or_pre_comp_const_index_u2, bool is_pclmulqdq_supported, Register in_out, Register in1, Register in2, 10303 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3, 10304 Register tmp1, Register tmp2, 10305 Register n_tmp3) { 10306 crc32c_pclmulqdq(w_xtmp1, in_out, const_or_pre_comp_const_index_u1, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3); 10307 crc32c_pclmulqdq(w_xtmp2, in1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3); 10308 10309 psllq(w_xtmp1, 1); 10310 movdl(tmp1, w_xtmp1); 10311 psrlq(w_xtmp1, 32); 10312 movdl(in_out, w_xtmp1); 10313 10314 xorl(tmp2, tmp2); 10315 crc32(tmp2, tmp1, 4); 10316 xorl(in_out, tmp2); 10317 10318 psllq(w_xtmp2, 1); 10319 movdl(tmp1, w_xtmp2); 10320 psrlq(w_xtmp2, 32); 10321 movdl(in1, w_xtmp2); 10322 10323 xorl(tmp2, tmp2); 10324 crc32(tmp2, tmp1, 4); 10325 xorl(in1, tmp2); 10326 xorl(in_out, in1); 10327 xorl(in_out, in2); 10328 } 10329 10330 void MacroAssembler::crc32c_proc_chunk(uint32_t size, uint32_t const_or_pre_comp_const_index_u1, uint32_t const_or_pre_comp_const_index_u2, bool is_pclmulqdq_supported, 10331 Register in_out1, Register in_out2, Register in_out3, 10332 Register tmp1, Register tmp2, Register tmp3, 10333 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3, 10334 Register tmp4, Register tmp5, 10335 Register n_tmp6) { 10336 Label L_processPartitions; 10337 Label L_processPartition; 10338 Label L_exit; 10339 10340 bind(L_processPartitions); 10341 cmpl(in_out1, 3 * size); 10342 jcc(Assembler::less, L_exit); 10343 xorl(tmp1, tmp1); 10344 xorl(tmp2, tmp2); 10345 movl(tmp3, in_out2); 10346 addl(tmp3, size); 10347 10348 bind(L_processPartition); 10349 crc32(in_out3, Address(in_out2, 0), 4); 10350 crc32(tmp1, Address(in_out2, size), 4); 10351 crc32(tmp2, Address(in_out2, size*2), 4); 10352 crc32(in_out3, Address(in_out2, 0+4), 4); 10353 crc32(tmp1, Address(in_out2, size+4), 4); 10354 crc32(tmp2, Address(in_out2, size*2+4), 4); 10355 addl(in_out2, 8); 10356 cmpl(in_out2, tmp3); 10357 jcc(Assembler::less, L_processPartition); 10358 10359 push(tmp3); 10360 push(in_out1); 10361 push(in_out2); 10362 tmp4 = tmp3; 10363 tmp5 = in_out1; 10364 n_tmp6 = in_out2; 10365 10366 crc32c_rec_alt2(const_or_pre_comp_const_index_u1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, in_out3, tmp1, tmp2, 10367 w_xtmp1, w_xtmp2, w_xtmp3, 10368 tmp4, tmp5, 10369 n_tmp6); 10370 10371 pop(in_out2); 10372 pop(in_out1); 10373 pop(tmp3); 10374 10375 addl(in_out2, 2 * size); 10376 subl(in_out1, 3 * size); 10377 jmp(L_processPartitions); 10378 10379 bind(L_exit); 10380 } 10381 #endif //LP64 10382 10383 #ifdef _LP64 10384 // Algorithm 2: Pipelined usage of the CRC32 instruction. 10385 // Input: A buffer I of L bytes. 10386 // Output: the CRC32C value of the buffer. 10387 // Notations: 10388 // Write L = 24N + r, with N = floor (L/24). 10389 // r = L mod 24 (0 <= r < 24). 10390 // Consider I as the concatenation of A|B|C|R, where A, B, C, each, 10391 // N quadwords, and R consists of r bytes. 10392 // A[j] = I [8j+7:8j], j= 0, 1, ..., N-1 10393 // B[j] = I [N + 8j+7:N + 8j], j= 0, 1, ..., N-1 10394 // C[j] = I [2N + 8j+7:2N + 8j], j= 0, 1, ..., N-1 10395 // if r > 0 R[j] = I [3N +j], j= 0, 1, ...,r-1 10396 void MacroAssembler::crc32c_ipl_alg2_alt2(Register in_out, Register in1, Register in2, 10397 Register tmp1, Register tmp2, Register tmp3, 10398 Register tmp4, Register tmp5, Register tmp6, 10399 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3, 10400 bool is_pclmulqdq_supported) { 10401 uint32_t const_or_pre_comp_const_index[CRC32C_NUM_PRECOMPUTED_CONSTANTS]; 10402 Label L_wordByWord; 10403 Label L_byteByByteProlog; 10404 Label L_byteByByte; 10405 Label L_exit; 10406 10407 if (is_pclmulqdq_supported ) { 10408 const_or_pre_comp_const_index[1] = *(uint32_t *)StubRoutines::_crc32c_table_addr; 10409 const_or_pre_comp_const_index[0] = *((uint32_t *)StubRoutines::_crc32c_table_addr+1); 10410 10411 const_or_pre_comp_const_index[3] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 2); 10412 const_or_pre_comp_const_index[2] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 3); 10413 10414 const_or_pre_comp_const_index[5] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 4); 10415 const_or_pre_comp_const_index[4] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 5); 10416 assert((CRC32C_NUM_PRECOMPUTED_CONSTANTS - 1 ) == 5, "Checking whether you declared all of the constants based on the number of \"chunks\""); 10417 } else { 10418 const_or_pre_comp_const_index[0] = 1; 10419 const_or_pre_comp_const_index[1] = 0; 10420 10421 const_or_pre_comp_const_index[2] = 3; 10422 const_or_pre_comp_const_index[3] = 2; 10423 10424 const_or_pre_comp_const_index[4] = 5; 10425 const_or_pre_comp_const_index[5] = 4; 10426 } 10427 crc32c_proc_chunk(CRC32C_HIGH, const_or_pre_comp_const_index[0], const_or_pre_comp_const_index[1], is_pclmulqdq_supported, 10428 in2, in1, in_out, 10429 tmp1, tmp2, tmp3, 10430 w_xtmp1, w_xtmp2, w_xtmp3, 10431 tmp4, tmp5, 10432 tmp6); 10433 crc32c_proc_chunk(CRC32C_MIDDLE, const_or_pre_comp_const_index[2], const_or_pre_comp_const_index[3], is_pclmulqdq_supported, 10434 in2, in1, in_out, 10435 tmp1, tmp2, tmp3, 10436 w_xtmp1, w_xtmp2, w_xtmp3, 10437 tmp4, tmp5, 10438 tmp6); 10439 crc32c_proc_chunk(CRC32C_LOW, const_or_pre_comp_const_index[4], const_or_pre_comp_const_index[5], is_pclmulqdq_supported, 10440 in2, in1, in_out, 10441 tmp1, tmp2, tmp3, 10442 w_xtmp1, w_xtmp2, w_xtmp3, 10443 tmp4, tmp5, 10444 tmp6); 10445 movl(tmp1, in2); 10446 andl(tmp1, 0x00000007); 10447 negl(tmp1); 10448 addl(tmp1, in2); 10449 addq(tmp1, in1); 10450 10451 BIND(L_wordByWord); 10452 cmpq(in1, tmp1); 10453 jcc(Assembler::greaterEqual, L_byteByByteProlog); 10454 crc32(in_out, Address(in1, 0), 4); 10455 addq(in1, 4); 10456 jmp(L_wordByWord); 10457 10458 BIND(L_byteByByteProlog); 10459 andl(in2, 0x00000007); 10460 movl(tmp2, 1); 10461 10462 BIND(L_byteByByte); 10463 cmpl(tmp2, in2); 10464 jccb(Assembler::greater, L_exit); 10465 crc32(in_out, Address(in1, 0), 1); 10466 incq(in1); 10467 incl(tmp2); 10468 jmp(L_byteByByte); 10469 10470 BIND(L_exit); 10471 } 10472 #else 10473 void MacroAssembler::crc32c_ipl_alg2_alt2(Register in_out, Register in1, Register in2, 10474 Register tmp1, Register tmp2, Register tmp3, 10475 Register tmp4, Register tmp5, Register tmp6, 10476 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3, 10477 bool is_pclmulqdq_supported) { 10478 uint32_t const_or_pre_comp_const_index[CRC32C_NUM_PRECOMPUTED_CONSTANTS]; 10479 Label L_wordByWord; 10480 Label L_byteByByteProlog; 10481 Label L_byteByByte; 10482 Label L_exit; 10483 10484 if (is_pclmulqdq_supported) { 10485 const_or_pre_comp_const_index[1] = *(uint32_t *)StubRoutines::_crc32c_table_addr; 10486 const_or_pre_comp_const_index[0] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 1); 10487 10488 const_or_pre_comp_const_index[3] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 2); 10489 const_or_pre_comp_const_index[2] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 3); 10490 10491 const_or_pre_comp_const_index[5] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 4); 10492 const_or_pre_comp_const_index[4] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 5); 10493 } else { 10494 const_or_pre_comp_const_index[0] = 1; 10495 const_or_pre_comp_const_index[1] = 0; 10496 10497 const_or_pre_comp_const_index[2] = 3; 10498 const_or_pre_comp_const_index[3] = 2; 10499 10500 const_or_pre_comp_const_index[4] = 5; 10501 const_or_pre_comp_const_index[5] = 4; 10502 } 10503 crc32c_proc_chunk(CRC32C_HIGH, const_or_pre_comp_const_index[0], const_or_pre_comp_const_index[1], is_pclmulqdq_supported, 10504 in2, in1, in_out, 10505 tmp1, tmp2, tmp3, 10506 w_xtmp1, w_xtmp2, w_xtmp3, 10507 tmp4, tmp5, 10508 tmp6); 10509 crc32c_proc_chunk(CRC32C_MIDDLE, const_or_pre_comp_const_index[2], const_or_pre_comp_const_index[3], is_pclmulqdq_supported, 10510 in2, in1, in_out, 10511 tmp1, tmp2, tmp3, 10512 w_xtmp1, w_xtmp2, w_xtmp3, 10513 tmp4, tmp5, 10514 tmp6); 10515 crc32c_proc_chunk(CRC32C_LOW, const_or_pre_comp_const_index[4], const_or_pre_comp_const_index[5], is_pclmulqdq_supported, 10516 in2, in1, in_out, 10517 tmp1, tmp2, tmp3, 10518 w_xtmp1, w_xtmp2, w_xtmp3, 10519 tmp4, tmp5, 10520 tmp6); 10521 movl(tmp1, in2); 10522 andl(tmp1, 0x00000007); 10523 negl(tmp1); 10524 addl(tmp1, in2); 10525 addl(tmp1, in1); 10526 10527 BIND(L_wordByWord); 10528 cmpl(in1, tmp1); 10529 jcc(Assembler::greaterEqual, L_byteByByteProlog); 10530 crc32(in_out, Address(in1,0), 4); 10531 addl(in1, 4); 10532 jmp(L_wordByWord); 10533 10534 BIND(L_byteByByteProlog); 10535 andl(in2, 0x00000007); 10536 movl(tmp2, 1); 10537 10538 BIND(L_byteByByte); 10539 cmpl(tmp2, in2); 10540 jccb(Assembler::greater, L_exit); 10541 movb(tmp1, Address(in1, 0)); 10542 crc32(in_out, tmp1, 1); 10543 incl(in1); 10544 incl(tmp2); 10545 jmp(L_byteByByte); 10546 10547 BIND(L_exit); 10548 } 10549 #endif // LP64 10550 #undef BIND 10551 #undef BLOCK_COMMENT 10552 10553 // Compress char[] array to byte[]. 10554 // ..\jdk\src\java.base\share\classes\java\lang\StringUTF16.java 10555 // @HotSpotIntrinsicCandidate 10556 // private static int compress(char[] src, int srcOff, byte[] dst, int dstOff, int len) { 10557 // for (int i = 0; i < len; i++) { 10558 // int c = src[srcOff++]; 10559 // if (c >>> 8 != 0) { 10560 // return 0; 10561 // } 10562 // dst[dstOff++] = (byte)c; 10563 // } 10564 // return len; 10565 // } 10566 void MacroAssembler::char_array_compress(Register src, Register dst, Register len, 10567 XMMRegister tmp1Reg, XMMRegister tmp2Reg, 10568 XMMRegister tmp3Reg, XMMRegister tmp4Reg, 10569 Register tmp5, Register result) { 10570 Label copy_chars_loop, return_length, return_zero, done, below_threshold; 10571 10572 // rsi: src 10573 // rdi: dst 10574 // rdx: len 10575 // rcx: tmp5 10576 // rax: result 10577 10578 // rsi holds start addr of source char[] to be compressed 10579 // rdi holds start addr of destination byte[] 10580 // rdx holds length 10581 10582 assert(len != result, ""); 10583 10584 // save length for return 10585 push(len); 10586 10587 if ((UseAVX > 2) && // AVX512 10588 VM_Version::supports_avx512vlbw() && 10589 VM_Version::supports_bmi2()) { 10590 10591 set_vector_masking(); // opening of the stub context for programming mask registers 10592 10593 Label copy_32_loop, copy_loop_tail, restore_k1_return_zero; 10594 10595 // alignement 10596 Label post_alignement; 10597 10598 // if length of the string is less than 16, handle it in an old fashioned 10599 // way 10600 testl(len, -32); 10601 jcc(Assembler::zero, below_threshold); 10602 10603 // First check whether a character is compressable ( <= 0xFF). 10604 // Create mask to test for Unicode chars inside zmm vector 10605 movl(result, 0x00FF); 10606 evpbroadcastw(tmp2Reg, result, Assembler::AVX_512bit); 10607 10608 // Save k1 10609 kmovql(k3, k1); 10610 10611 testl(len, -64); 10612 jcc(Assembler::zero, post_alignement); 10613 10614 movl(tmp5, dst); 10615 andl(tmp5, (32 - 1)); 10616 negl(tmp5); 10617 andl(tmp5, (32 - 1)); 10618 10619 // bail out when there is nothing to be done 10620 testl(tmp5, 0xFFFFFFFF); 10621 jcc(Assembler::zero, post_alignement); 10622 10623 // ~(~0 << len), where len is the # of remaining elements to process 10624 movl(result, 0xFFFFFFFF); 10625 shlxl(result, result, tmp5); 10626 notl(result); 10627 kmovdl(k1, result); 10628 10629 evmovdquw(tmp1Reg, k1, Address(src, 0), Assembler::AVX_512bit); 10630 evpcmpuw(k2, k1, tmp1Reg, tmp2Reg, Assembler::le, Assembler::AVX_512bit); 10631 ktestd(k2, k1); 10632 jcc(Assembler::carryClear, restore_k1_return_zero); 10633 10634 evpmovwb(Address(dst, 0), k1, tmp1Reg, Assembler::AVX_512bit); 10635 10636 addptr(src, tmp5); 10637 addptr(src, tmp5); 10638 addptr(dst, tmp5); 10639 subl(len, tmp5); 10640 10641 bind(post_alignement); 10642 // end of alignement 10643 10644 movl(tmp5, len); 10645 andl(tmp5, (32 - 1)); // tail count (in chars) 10646 andl(len, ~(32 - 1)); // vector count (in chars) 10647 jcc(Assembler::zero, copy_loop_tail); 10648 10649 lea(src, Address(src, len, Address::times_2)); 10650 lea(dst, Address(dst, len, Address::times_1)); 10651 negptr(len); 10652 10653 bind(copy_32_loop); 10654 evmovdquw(tmp1Reg, Address(src, len, Address::times_2), Assembler::AVX_512bit); 10655 evpcmpuw(k2, tmp1Reg, tmp2Reg, Assembler::le, Assembler::AVX_512bit); 10656 kortestdl(k2, k2); 10657 jcc(Assembler::carryClear, restore_k1_return_zero); 10658 10659 // All elements in current processed chunk are valid candidates for 10660 // compression. Write a truncated byte elements to the memory. 10661 evpmovwb(Address(dst, len, Address::times_1), tmp1Reg, Assembler::AVX_512bit); 10662 addptr(len, 32); 10663 jcc(Assembler::notZero, copy_32_loop); 10664 10665 bind(copy_loop_tail); 10666 // bail out when there is nothing to be done 10667 testl(tmp5, 0xFFFFFFFF); 10668 // Restore k1 10669 kmovql(k1, k3); 10670 jcc(Assembler::zero, return_length); 10671 10672 movl(len, tmp5); 10673 10674 // ~(~0 << len), where len is the # of remaining elements to process 10675 movl(result, 0xFFFFFFFF); 10676 shlxl(result, result, len); 10677 notl(result); 10678 10679 kmovdl(k1, result); 10680 10681 evmovdquw(tmp1Reg, k1, Address(src, 0), Assembler::AVX_512bit); 10682 evpcmpuw(k2, k1, tmp1Reg, tmp2Reg, Assembler::le, Assembler::AVX_512bit); 10683 ktestd(k2, k1); 10684 jcc(Assembler::carryClear, restore_k1_return_zero); 10685 10686 evpmovwb(Address(dst, 0), k1, tmp1Reg, Assembler::AVX_512bit); 10687 // Restore k1 10688 kmovql(k1, k3); 10689 jmp(return_length); 10690 10691 bind(restore_k1_return_zero); 10692 // Restore k1 10693 kmovql(k1, k3); 10694 jmp(return_zero); 10695 10696 clear_vector_masking(); // closing of the stub context for programming mask registers 10697 } 10698 if (UseSSE42Intrinsics) { 10699 Label copy_32_loop, copy_16, copy_tail; 10700 10701 bind(below_threshold); 10702 10703 movl(result, len); 10704 10705 movl(tmp5, 0xff00ff00); // create mask to test for Unicode chars in vectors 10706 10707 // vectored compression 10708 andl(len, 0xfffffff0); // vector count (in chars) 10709 andl(result, 0x0000000f); // tail count (in chars) 10710 testl(len, len); 10711 jccb(Assembler::zero, copy_16); 10712 10713 // compress 16 chars per iter 10714 movdl(tmp1Reg, tmp5); 10715 pshufd(tmp1Reg, tmp1Reg, 0); // store Unicode mask in tmp1Reg 10716 pxor(tmp4Reg, tmp4Reg); 10717 10718 lea(src, Address(src, len, Address::times_2)); 10719 lea(dst, Address(dst, len, Address::times_1)); 10720 negptr(len); 10721 10722 bind(copy_32_loop); 10723 movdqu(tmp2Reg, Address(src, len, Address::times_2)); // load 1st 8 characters 10724 por(tmp4Reg, tmp2Reg); 10725 movdqu(tmp3Reg, Address(src, len, Address::times_2, 16)); // load next 8 characters 10726 por(tmp4Reg, tmp3Reg); 10727 ptest(tmp4Reg, tmp1Reg); // check for Unicode chars in next vector 10728 jcc(Assembler::notZero, return_zero); 10729 packuswb(tmp2Reg, tmp3Reg); // only ASCII chars; compress each to 1 byte 10730 movdqu(Address(dst, len, Address::times_1), tmp2Reg); 10731 addptr(len, 16); 10732 jcc(Assembler::notZero, copy_32_loop); 10733 10734 // compress next vector of 8 chars (if any) 10735 bind(copy_16); 10736 movl(len, result); 10737 andl(len, 0xfffffff8); // vector count (in chars) 10738 andl(result, 0x00000007); // tail count (in chars) 10739 testl(len, len); 10740 jccb(Assembler::zero, copy_tail); 10741 10742 movdl(tmp1Reg, tmp5); 10743 pshufd(tmp1Reg, tmp1Reg, 0); // store Unicode mask in tmp1Reg 10744 pxor(tmp3Reg, tmp3Reg); 10745 10746 movdqu(tmp2Reg, Address(src, 0)); 10747 ptest(tmp2Reg, tmp1Reg); // check for Unicode chars in vector 10748 jccb(Assembler::notZero, return_zero); 10749 packuswb(tmp2Reg, tmp3Reg); // only LATIN1 chars; compress each to 1 byte 10750 movq(Address(dst, 0), tmp2Reg); 10751 addptr(src, 16); 10752 addptr(dst, 8); 10753 10754 bind(copy_tail); 10755 movl(len, result); 10756 } 10757 // compress 1 char per iter 10758 testl(len, len); 10759 jccb(Assembler::zero, return_length); 10760 lea(src, Address(src, len, Address::times_2)); 10761 lea(dst, Address(dst, len, Address::times_1)); 10762 negptr(len); 10763 10764 bind(copy_chars_loop); 10765 load_unsigned_short(result, Address(src, len, Address::times_2)); 10766 testl(result, 0xff00); // check if Unicode char 10767 jccb(Assembler::notZero, return_zero); 10768 movb(Address(dst, len, Address::times_1), result); // ASCII char; compress to 1 byte 10769 increment(len); 10770 jcc(Assembler::notZero, copy_chars_loop); 10771 10772 // if compression succeeded, return length 10773 bind(return_length); 10774 pop(result); 10775 jmpb(done); 10776 10777 // if compression failed, return 0 10778 bind(return_zero); 10779 xorl(result, result); 10780 addptr(rsp, wordSize); 10781 10782 bind(done); 10783 } 10784 10785 // Inflate byte[] array to char[]. 10786 // ..\jdk\src\java.base\share\classes\java\lang\StringLatin1.java 10787 // @HotSpotIntrinsicCandidate 10788 // private static void inflate(byte[] src, int srcOff, char[] dst, int dstOff, int len) { 10789 // for (int i = 0; i < len; i++) { 10790 // dst[dstOff++] = (char)(src[srcOff++] & 0xff); 10791 // } 10792 // } 10793 void MacroAssembler::byte_array_inflate(Register src, Register dst, Register len, 10794 XMMRegister tmp1, Register tmp2) { 10795 Label copy_chars_loop, done, below_threshold; 10796 // rsi: src 10797 // rdi: dst 10798 // rdx: len 10799 // rcx: tmp2 10800 10801 // rsi holds start addr of source byte[] to be inflated 10802 // rdi holds start addr of destination char[] 10803 // rdx holds length 10804 assert_different_registers(src, dst, len, tmp2); 10805 10806 if ((UseAVX > 2) && // AVX512 10807 VM_Version::supports_avx512vlbw() && 10808 VM_Version::supports_bmi2()) { 10809 10810 set_vector_masking(); // opening of the stub context for programming mask registers 10811 10812 Label copy_32_loop, copy_tail; 10813 Register tmp3_aliased = len; 10814 10815 // if length of the string is less than 16, handle it in an old fashioned 10816 // way 10817 testl(len, -16); 10818 jcc(Assembler::zero, below_threshold); 10819 10820 // In order to use only one arithmetic operation for the main loop we use 10821 // this pre-calculation 10822 movl(tmp2, len); 10823 andl(tmp2, (32 - 1)); // tail count (in chars), 32 element wide loop 10824 andl(len, -32); // vector count 10825 jccb(Assembler::zero, copy_tail); 10826 10827 lea(src, Address(src, len, Address::times_1)); 10828 lea(dst, Address(dst, len, Address::times_2)); 10829 negptr(len); 10830 10831 10832 // inflate 32 chars per iter 10833 bind(copy_32_loop); 10834 vpmovzxbw(tmp1, Address(src, len, Address::times_1), Assembler::AVX_512bit); 10835 evmovdquw(Address(dst, len, Address::times_2), tmp1, Assembler::AVX_512bit); 10836 addptr(len, 32); 10837 jcc(Assembler::notZero, copy_32_loop); 10838 10839 bind(copy_tail); 10840 // bail out when there is nothing to be done 10841 testl(tmp2, -1); // we don't destroy the contents of tmp2 here 10842 jcc(Assembler::zero, done); 10843 10844 // Save k1 10845 kmovql(k2, k1); 10846 10847 // ~(~0 << length), where length is the # of remaining elements to process 10848 movl(tmp3_aliased, -1); 10849 shlxl(tmp3_aliased, tmp3_aliased, tmp2); 10850 notl(tmp3_aliased); 10851 kmovdl(k1, tmp3_aliased); 10852 evpmovzxbw(tmp1, k1, Address(src, 0), Assembler::AVX_512bit); 10853 evmovdquw(Address(dst, 0), k1, tmp1, Assembler::AVX_512bit); 10854 10855 // Restore k1 10856 kmovql(k1, k2); 10857 jmp(done); 10858 10859 clear_vector_masking(); // closing of the stub context for programming mask registers 10860 } 10861 if (UseSSE42Intrinsics) { 10862 Label copy_16_loop, copy_8_loop, copy_bytes, copy_new_tail, copy_tail; 10863 10864 movl(tmp2, len); 10865 10866 if (UseAVX > 1) { 10867 andl(tmp2, (16 - 1)); 10868 andl(len, -16); 10869 jccb(Assembler::zero, copy_new_tail); 10870 } else { 10871 andl(tmp2, 0x00000007); // tail count (in chars) 10872 andl(len, 0xfffffff8); // vector count (in chars) 10873 jccb(Assembler::zero, copy_tail); 10874 } 10875 10876 // vectored inflation 10877 lea(src, Address(src, len, Address::times_1)); 10878 lea(dst, Address(dst, len, Address::times_2)); 10879 negptr(len); 10880 10881 if (UseAVX > 1) { 10882 bind(copy_16_loop); 10883 vpmovzxbw(tmp1, Address(src, len, Address::times_1), Assembler::AVX_256bit); 10884 vmovdqu(Address(dst, len, Address::times_2), tmp1); 10885 addptr(len, 16); 10886 jcc(Assembler::notZero, copy_16_loop); 10887 10888 bind(below_threshold); 10889 bind(copy_new_tail); 10890 if ((UseAVX > 2) && 10891 VM_Version::supports_avx512vlbw() && 10892 VM_Version::supports_bmi2()) { 10893 movl(tmp2, len); 10894 } else { 10895 movl(len, tmp2); 10896 } 10897 andl(tmp2, 0x00000007); 10898 andl(len, 0xFFFFFFF8); 10899 jccb(Assembler::zero, copy_tail); 10900 10901 pmovzxbw(tmp1, Address(src, 0)); 10902 movdqu(Address(dst, 0), tmp1); 10903 addptr(src, 8); 10904 addptr(dst, 2 * 8); 10905 10906 jmp(copy_tail, true); 10907 } 10908 10909 // inflate 8 chars per iter 10910 bind(copy_8_loop); 10911 pmovzxbw(tmp1, Address(src, len, Address::times_1)); // unpack to 8 words 10912 movdqu(Address(dst, len, Address::times_2), tmp1); 10913 addptr(len, 8); 10914 jcc(Assembler::notZero, copy_8_loop); 10915 10916 bind(copy_tail); 10917 movl(len, tmp2); 10918 10919 cmpl(len, 4); 10920 jccb(Assembler::less, copy_bytes); 10921 10922 movdl(tmp1, Address(src, 0)); // load 4 byte chars 10923 pmovzxbw(tmp1, tmp1); 10924 movq(Address(dst, 0), tmp1); 10925 subptr(len, 4); 10926 addptr(src, 4); 10927 addptr(dst, 8); 10928 10929 bind(copy_bytes); 10930 } 10931 testl(len, len); 10932 jccb(Assembler::zero, done); 10933 lea(src, Address(src, len, Address::times_1)); 10934 lea(dst, Address(dst, len, Address::times_2)); 10935 negptr(len); 10936 10937 // inflate 1 char per iter 10938 bind(copy_chars_loop); 10939 load_unsigned_byte(tmp2, Address(src, len, Address::times_1)); // load byte char 10940 movw(Address(dst, len, Address::times_2), tmp2); // inflate byte char to word 10941 increment(len); 10942 jcc(Assembler::notZero, copy_chars_loop); 10943 10944 bind(done); 10945 } 10946 10947 Assembler::Condition MacroAssembler::negate_condition(Assembler::Condition cond) { 10948 switch (cond) { 10949 // Note some conditions are synonyms for others 10950 case Assembler::zero: return Assembler::notZero; 10951 case Assembler::notZero: return Assembler::zero; 10952 case Assembler::less: return Assembler::greaterEqual; 10953 case Assembler::lessEqual: return Assembler::greater; 10954 case Assembler::greater: return Assembler::lessEqual; 10955 case Assembler::greaterEqual: return Assembler::less; 10956 case Assembler::below: return Assembler::aboveEqual; 10957 case Assembler::belowEqual: return Assembler::above; 10958 case Assembler::above: return Assembler::belowEqual; 10959 case Assembler::aboveEqual: return Assembler::below; 10960 case Assembler::overflow: return Assembler::noOverflow; 10961 case Assembler::noOverflow: return Assembler::overflow; 10962 case Assembler::negative: return Assembler::positive; 10963 case Assembler::positive: return Assembler::negative; 10964 case Assembler::parity: return Assembler::noParity; 10965 case Assembler::noParity: return Assembler::parity; 10966 } 10967 ShouldNotReachHere(); return Assembler::overflow; 10968 } 10969 10970 SkipIfEqual::SkipIfEqual( 10971 MacroAssembler* masm, const bool* flag_addr, bool value) { 10972 _masm = masm; 10973 _masm->cmp8(ExternalAddress((address)flag_addr), value); 10974 _masm->jcc(Assembler::equal, _label); 10975 } 10976 10977 SkipIfEqual::~SkipIfEqual() { 10978 _masm->bind(_label); 10979 } 10980 10981 // 32-bit Windows has its own fast-path implementation 10982 // of get_thread 10983 #if !defined(WIN32) || defined(_LP64) 10984 10985 // This is simply a call to Thread::current() 10986 void MacroAssembler::get_thread(Register thread) { 10987 if (thread != rax) { 10988 push(rax); 10989 } 10990 LP64_ONLY(push(rdi);) 10991 LP64_ONLY(push(rsi);) 10992 push(rdx); 10993 push(rcx); 10994 #ifdef _LP64 10995 push(r8); 10996 push(r9); 10997 push(r10); 10998 push(r11); 10999 #endif 11000 11001 MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, Thread::current), 0); 11002 11003 #ifdef _LP64 11004 pop(r11); 11005 pop(r10); 11006 pop(r9); 11007 pop(r8); 11008 #endif 11009 pop(rcx); 11010 pop(rdx); 11011 LP64_ONLY(pop(rsi);) 11012 LP64_ONLY(pop(rdi);) 11013 if (thread != rax) { 11014 mov(thread, rax); 11015 pop(rax); 11016 } 11017 } 11018 11019 #endif