1 /* 2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "asm/assembler.hpp" 27 #include "asm/assembler.inline.hpp" 28 #include "compiler/disassembler.hpp" 29 #include "gc/shared/cardTableModRefBS.hpp" 30 #include "gc/shared/collectedHeap.inline.hpp" 31 #include "interpreter/interpreter.hpp" 32 #include "memory/resourceArea.hpp" 33 #include "memory/universe.hpp" 34 #include "oops/klass.inline.hpp" 35 #include "prims/methodHandles.hpp" 36 #include "runtime/biasedLocking.hpp" 37 #include "runtime/interfaceSupport.hpp" 38 #include "runtime/objectMonitor.hpp" 39 #include "runtime/os.hpp" 40 #include "runtime/sharedRuntime.hpp" 41 #include "runtime/stubRoutines.hpp" 42 #include "runtime/thread.hpp" 43 #include "utilities/macros.hpp" 44 #if INCLUDE_ALL_GCS 45 #include "gc/g1/g1CollectedHeap.inline.hpp" 46 #include "gc/g1/g1SATBCardTableModRefBS.hpp" 47 #include "gc/g1/heapRegion.hpp" 48 #endif // INCLUDE_ALL_GCS 49 #include "crc32c.h" 50 #ifdef COMPILER2 51 #include "opto/intrinsicnode.hpp" 52 #endif 53 54 #ifdef PRODUCT 55 #define BLOCK_COMMENT(str) /* nothing */ 56 #define STOP(error) stop(error) 57 #else 58 #define BLOCK_COMMENT(str) block_comment(str) 59 #define STOP(error) block_comment(error); stop(error) 60 #endif 61 62 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") 63 64 #ifdef ASSERT 65 bool AbstractAssembler::pd_check_instruction_mark() { return true; } 66 #endif 67 68 static Assembler::Condition reverse[] = { 69 Assembler::noOverflow /* overflow = 0x0 */ , 70 Assembler::overflow /* noOverflow = 0x1 */ , 71 Assembler::aboveEqual /* carrySet = 0x2, below = 0x2 */ , 72 Assembler::below /* aboveEqual = 0x3, carryClear = 0x3 */ , 73 Assembler::notZero /* zero = 0x4, equal = 0x4 */ , 74 Assembler::zero /* notZero = 0x5, notEqual = 0x5 */ , 75 Assembler::above /* belowEqual = 0x6 */ , 76 Assembler::belowEqual /* above = 0x7 */ , 77 Assembler::positive /* negative = 0x8 */ , 78 Assembler::negative /* positive = 0x9 */ , 79 Assembler::noParity /* parity = 0xa */ , 80 Assembler::parity /* noParity = 0xb */ , 81 Assembler::greaterEqual /* less = 0xc */ , 82 Assembler::less /* greaterEqual = 0xd */ , 83 Assembler::greater /* lessEqual = 0xe */ , 84 Assembler::lessEqual /* greater = 0xf, */ 85 86 }; 87 88 89 // Implementation of MacroAssembler 90 91 // First all the versions that have distinct versions depending on 32/64 bit 92 // Unless the difference is trivial (1 line or so). 93 94 #ifndef _LP64 95 96 // 32bit versions 97 98 Address MacroAssembler::as_Address(AddressLiteral adr) { 99 return Address(adr.target(), adr.rspec()); 100 } 101 102 Address MacroAssembler::as_Address(ArrayAddress adr) { 103 return Address::make_array(adr); 104 } 105 106 void MacroAssembler::call_VM_leaf_base(address entry_point, 107 int number_of_arguments) { 108 call(RuntimeAddress(entry_point)); 109 increment(rsp, number_of_arguments * wordSize); 110 } 111 112 void MacroAssembler::cmpklass(Address src1, Metadata* obj) { 113 cmp_literal32(src1, (int32_t)obj, metadata_Relocation::spec_for_immediate()); 114 } 115 116 void MacroAssembler::cmpklass(Register src1, Metadata* obj) { 117 cmp_literal32(src1, (int32_t)obj, metadata_Relocation::spec_for_immediate()); 118 } 119 120 void MacroAssembler::cmpoop(Address src1, jobject obj) { 121 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate()); 122 } 123 124 void MacroAssembler::cmpoop(Register src1, jobject obj) { 125 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate()); 126 } 127 128 void MacroAssembler::extend_sign(Register hi, Register lo) { 129 // According to Intel Doc. AP-526, "Integer Divide", p.18. 130 if (VM_Version::is_P6() && hi == rdx && lo == rax) { 131 cdql(); 132 } else { 133 movl(hi, lo); 134 sarl(hi, 31); 135 } 136 } 137 138 void MacroAssembler::jC2(Register tmp, Label& L) { 139 // set parity bit if FPU flag C2 is set (via rax) 140 save_rax(tmp); 141 fwait(); fnstsw_ax(); 142 sahf(); 143 restore_rax(tmp); 144 // branch 145 jcc(Assembler::parity, L); 146 } 147 148 void MacroAssembler::jnC2(Register tmp, Label& L) { 149 // set parity bit if FPU flag C2 is set (via rax) 150 save_rax(tmp); 151 fwait(); fnstsw_ax(); 152 sahf(); 153 restore_rax(tmp); 154 // branch 155 jcc(Assembler::noParity, L); 156 } 157 158 // 32bit can do a case table jump in one instruction but we no longer allow the base 159 // to be installed in the Address class 160 void MacroAssembler::jump(ArrayAddress entry) { 161 jmp(as_Address(entry)); 162 } 163 164 // Note: y_lo will be destroyed 165 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) { 166 // Long compare for Java (semantics as described in JVM spec.) 167 Label high, low, done; 168 169 cmpl(x_hi, y_hi); 170 jcc(Assembler::less, low); 171 jcc(Assembler::greater, high); 172 // x_hi is the return register 173 xorl(x_hi, x_hi); 174 cmpl(x_lo, y_lo); 175 jcc(Assembler::below, low); 176 jcc(Assembler::equal, done); 177 178 bind(high); 179 xorl(x_hi, x_hi); 180 increment(x_hi); 181 jmp(done); 182 183 bind(low); 184 xorl(x_hi, x_hi); 185 decrementl(x_hi); 186 187 bind(done); 188 } 189 190 void MacroAssembler::lea(Register dst, AddressLiteral src) { 191 mov_literal32(dst, (int32_t)src.target(), src.rspec()); 192 } 193 194 void MacroAssembler::lea(Address dst, AddressLiteral adr) { 195 // leal(dst, as_Address(adr)); 196 // see note in movl as to why we must use a move 197 mov_literal32(dst, (int32_t) adr.target(), adr.rspec()); 198 } 199 200 void MacroAssembler::leave() { 201 mov(rsp, rbp); 202 pop(rbp); 203 } 204 205 void MacroAssembler::lmul(int x_rsp_offset, int y_rsp_offset) { 206 // Multiplication of two Java long values stored on the stack 207 // as illustrated below. Result is in rdx:rax. 208 // 209 // rsp ---> [ ?? ] \ \ 210 // .... | y_rsp_offset | 211 // [ y_lo ] / (in bytes) | x_rsp_offset 212 // [ y_hi ] | (in bytes) 213 // .... | 214 // [ x_lo ] / 215 // [ x_hi ] 216 // .... 217 // 218 // Basic idea: lo(result) = lo(x_lo * y_lo) 219 // hi(result) = hi(x_lo * y_lo) + lo(x_hi * y_lo) + lo(x_lo * y_hi) 220 Address x_hi(rsp, x_rsp_offset + wordSize); Address x_lo(rsp, x_rsp_offset); 221 Address y_hi(rsp, y_rsp_offset + wordSize); Address y_lo(rsp, y_rsp_offset); 222 Label quick; 223 // load x_hi, y_hi and check if quick 224 // multiplication is possible 225 movl(rbx, x_hi); 226 movl(rcx, y_hi); 227 movl(rax, rbx); 228 orl(rbx, rcx); // rbx, = 0 <=> x_hi = 0 and y_hi = 0 229 jcc(Assembler::zero, quick); // if rbx, = 0 do quick multiply 230 // do full multiplication 231 // 1st step 232 mull(y_lo); // x_hi * y_lo 233 movl(rbx, rax); // save lo(x_hi * y_lo) in rbx, 234 // 2nd step 235 movl(rax, x_lo); 236 mull(rcx); // x_lo * y_hi 237 addl(rbx, rax); // add lo(x_lo * y_hi) to rbx, 238 // 3rd step 239 bind(quick); // note: rbx, = 0 if quick multiply! 240 movl(rax, x_lo); 241 mull(y_lo); // x_lo * y_lo 242 addl(rdx, rbx); // correct hi(x_lo * y_lo) 243 } 244 245 void MacroAssembler::lneg(Register hi, Register lo) { 246 negl(lo); 247 adcl(hi, 0); 248 negl(hi); 249 } 250 251 void MacroAssembler::lshl(Register hi, Register lo) { 252 // Java shift left long support (semantics as described in JVM spec., p.305) 253 // (basic idea for shift counts s >= n: x << s == (x << n) << (s - n)) 254 // shift value is in rcx ! 255 assert(hi != rcx, "must not use rcx"); 256 assert(lo != rcx, "must not use rcx"); 257 const Register s = rcx; // shift count 258 const int n = BitsPerWord; 259 Label L; 260 andl(s, 0x3f); // s := s & 0x3f (s < 0x40) 261 cmpl(s, n); // if (s < n) 262 jcc(Assembler::less, L); // else (s >= n) 263 movl(hi, lo); // x := x << n 264 xorl(lo, lo); 265 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n! 266 bind(L); // s (mod n) < n 267 shldl(hi, lo); // x := x << s 268 shll(lo); 269 } 270 271 272 void MacroAssembler::lshr(Register hi, Register lo, bool sign_extension) { 273 // Java shift right long support (semantics as described in JVM spec., p.306 & p.310) 274 // (basic idea for shift counts s >= n: x >> s == (x >> n) >> (s - n)) 275 assert(hi != rcx, "must not use rcx"); 276 assert(lo != rcx, "must not use rcx"); 277 const Register s = rcx; // shift count 278 const int n = BitsPerWord; 279 Label L; 280 andl(s, 0x3f); // s := s & 0x3f (s < 0x40) 281 cmpl(s, n); // if (s < n) 282 jcc(Assembler::less, L); // else (s >= n) 283 movl(lo, hi); // x := x >> n 284 if (sign_extension) sarl(hi, 31); 285 else xorl(hi, hi); 286 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n! 287 bind(L); // s (mod n) < n 288 shrdl(lo, hi); // x := x >> s 289 if (sign_extension) sarl(hi); 290 else shrl(hi); 291 } 292 293 void MacroAssembler::movoop(Register dst, jobject obj) { 294 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate()); 295 } 296 297 void MacroAssembler::movoop(Address dst, jobject obj) { 298 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate()); 299 } 300 301 void MacroAssembler::mov_metadata(Register dst, Metadata* obj) { 302 mov_literal32(dst, (int32_t)obj, metadata_Relocation::spec_for_immediate()); 303 } 304 305 void MacroAssembler::mov_metadata(Address dst, Metadata* obj) { 306 mov_literal32(dst, (int32_t)obj, metadata_Relocation::spec_for_immediate()); 307 } 308 309 void MacroAssembler::movptr(Register dst, AddressLiteral src, Register scratch) { 310 // scratch register is not used, 311 // it is defined to match parameters of 64-bit version of this method. 312 if (src.is_lval()) { 313 mov_literal32(dst, (intptr_t)src.target(), src.rspec()); 314 } else { 315 movl(dst, as_Address(src)); 316 } 317 } 318 319 void MacroAssembler::movptr(ArrayAddress dst, Register src) { 320 movl(as_Address(dst), src); 321 } 322 323 void MacroAssembler::movptr(Register dst, ArrayAddress src) { 324 movl(dst, as_Address(src)); 325 } 326 327 // src should NEVER be a real pointer. Use AddressLiteral for true pointers 328 void MacroAssembler::movptr(Address dst, intptr_t src) { 329 movl(dst, src); 330 } 331 332 333 void MacroAssembler::pop_callee_saved_registers() { 334 pop(rcx); 335 pop(rdx); 336 pop(rdi); 337 pop(rsi); 338 } 339 340 void MacroAssembler::pop_fTOS() { 341 fld_d(Address(rsp, 0)); 342 addl(rsp, 2 * wordSize); 343 } 344 345 void MacroAssembler::push_callee_saved_registers() { 346 push(rsi); 347 push(rdi); 348 push(rdx); 349 push(rcx); 350 } 351 352 void MacroAssembler::push_fTOS() { 353 subl(rsp, 2 * wordSize); 354 fstp_d(Address(rsp, 0)); 355 } 356 357 358 void MacroAssembler::pushoop(jobject obj) { 359 push_literal32((int32_t)obj, oop_Relocation::spec_for_immediate()); 360 } 361 362 void MacroAssembler::pushklass(Metadata* obj) { 363 push_literal32((int32_t)obj, metadata_Relocation::spec_for_immediate()); 364 } 365 366 void MacroAssembler::pushptr(AddressLiteral src) { 367 if (src.is_lval()) { 368 push_literal32((int32_t)src.target(), src.rspec()); 369 } else { 370 pushl(as_Address(src)); 371 } 372 } 373 374 void MacroAssembler::set_word_if_not_zero(Register dst) { 375 xorl(dst, dst); 376 set_byte_if_not_zero(dst); 377 } 378 379 static void pass_arg0(MacroAssembler* masm, Register arg) { 380 masm->push(arg); 381 } 382 383 static void pass_arg1(MacroAssembler* masm, Register arg) { 384 masm->push(arg); 385 } 386 387 static void pass_arg2(MacroAssembler* masm, Register arg) { 388 masm->push(arg); 389 } 390 391 static void pass_arg3(MacroAssembler* masm, Register arg) { 392 masm->push(arg); 393 } 394 395 #ifndef PRODUCT 396 extern "C" void findpc(intptr_t x); 397 #endif 398 399 void MacroAssembler::debug32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip, char* msg) { 400 // In order to get locks to work, we need to fake a in_VM state 401 JavaThread* thread = JavaThread::current(); 402 JavaThreadState saved_state = thread->thread_state(); 403 thread->set_thread_state(_thread_in_vm); 404 if (ShowMessageBoxOnError) { 405 JavaThread* thread = JavaThread::current(); 406 JavaThreadState saved_state = thread->thread_state(); 407 thread->set_thread_state(_thread_in_vm); 408 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 409 ttyLocker ttyl; 410 BytecodeCounter::print(); 411 } 412 // To see where a verify_oop failed, get $ebx+40/X for this frame. 413 // This is the value of eip which points to where verify_oop will return. 414 if (os::message_box(msg, "Execution stopped, print registers?")) { 415 print_state32(rdi, rsi, rbp, rsp, rbx, rdx, rcx, rax, eip); 416 BREAKPOINT; 417 } 418 } else { 419 ttyLocker ttyl; 420 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n", msg); 421 } 422 // Don't assert holding the ttyLock 423 assert(false, "DEBUG MESSAGE: %s", msg); 424 ThreadStateTransition::transition(thread, _thread_in_vm, saved_state); 425 } 426 427 void MacroAssembler::print_state32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip) { 428 ttyLocker ttyl; 429 FlagSetting fs(Debugging, true); 430 tty->print_cr("eip = 0x%08x", eip); 431 #ifndef PRODUCT 432 if ((WizardMode || Verbose) && PrintMiscellaneous) { 433 tty->cr(); 434 findpc(eip); 435 tty->cr(); 436 } 437 #endif 438 #define PRINT_REG(rax) \ 439 { tty->print("%s = ", #rax); os::print_location(tty, rax); } 440 PRINT_REG(rax); 441 PRINT_REG(rbx); 442 PRINT_REG(rcx); 443 PRINT_REG(rdx); 444 PRINT_REG(rdi); 445 PRINT_REG(rsi); 446 PRINT_REG(rbp); 447 PRINT_REG(rsp); 448 #undef PRINT_REG 449 // Print some words near top of staack. 450 int* dump_sp = (int*) rsp; 451 for (int col1 = 0; col1 < 8; col1++) { 452 tty->print("(rsp+0x%03x) 0x%08x: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp); 453 os::print_location(tty, *dump_sp++); 454 } 455 for (int row = 0; row < 16; row++) { 456 tty->print("(rsp+0x%03x) 0x%08x: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp); 457 for (int col = 0; col < 8; col++) { 458 tty->print(" 0x%08x", *dump_sp++); 459 } 460 tty->cr(); 461 } 462 // Print some instructions around pc: 463 Disassembler::decode((address)eip-64, (address)eip); 464 tty->print_cr("--------"); 465 Disassembler::decode((address)eip, (address)eip+32); 466 } 467 468 void MacroAssembler::stop(const char* msg) { 469 ExternalAddress message((address)msg); 470 // push address of message 471 pushptr(message.addr()); 472 { Label L; call(L, relocInfo::none); bind(L); } // push eip 473 pusha(); // push registers 474 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug32))); 475 hlt(); 476 } 477 478 void MacroAssembler::warn(const char* msg) { 479 push_CPU_state(); 480 481 ExternalAddress message((address) msg); 482 // push address of message 483 pushptr(message.addr()); 484 485 call(RuntimeAddress(CAST_FROM_FN_PTR(address, warning))); 486 addl(rsp, wordSize); // discard argument 487 pop_CPU_state(); 488 } 489 490 void MacroAssembler::print_state() { 491 { Label L; call(L, relocInfo::none); bind(L); } // push eip 492 pusha(); // push registers 493 494 push_CPU_state(); 495 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::print_state32))); 496 pop_CPU_state(); 497 498 popa(); 499 addl(rsp, wordSize); 500 } 501 502 #else // _LP64 503 504 // 64 bit versions 505 506 Address MacroAssembler::as_Address(AddressLiteral adr) { 507 // amd64 always does this as a pc-rel 508 // we can be absolute or disp based on the instruction type 509 // jmp/call are displacements others are absolute 510 assert(!adr.is_lval(), "must be rval"); 511 assert(reachable(adr), "must be"); 512 return Address((int32_t)(intptr_t)(adr.target() - pc()), adr.target(), adr.reloc()); 513 514 } 515 516 Address MacroAssembler::as_Address(ArrayAddress adr) { 517 AddressLiteral base = adr.base(); 518 lea(rscratch1, base); 519 Address index = adr.index(); 520 assert(index._disp == 0, "must not have disp"); // maybe it can? 521 Address array(rscratch1, index._index, index._scale, index._disp); 522 return array; 523 } 524 525 void MacroAssembler::call_VM_leaf_base(address entry_point, int num_args) { 526 Label L, E; 527 528 #ifdef _WIN64 529 // Windows always allocates space for it's register args 530 assert(num_args <= 4, "only register arguments supported"); 531 subq(rsp, frame::arg_reg_save_area_bytes); 532 #endif 533 534 // Align stack if necessary 535 testl(rsp, 15); 536 jcc(Assembler::zero, L); 537 538 subq(rsp, 8); 539 { 540 call(RuntimeAddress(entry_point)); 541 } 542 addq(rsp, 8); 543 jmp(E); 544 545 bind(L); 546 { 547 call(RuntimeAddress(entry_point)); 548 } 549 550 bind(E); 551 552 #ifdef _WIN64 553 // restore stack pointer 554 addq(rsp, frame::arg_reg_save_area_bytes); 555 #endif 556 557 } 558 559 void MacroAssembler::cmp64(Register src1, AddressLiteral src2) { 560 assert(!src2.is_lval(), "should use cmpptr"); 561 562 if (reachable(src2)) { 563 cmpq(src1, as_Address(src2)); 564 } else { 565 lea(rscratch1, src2); 566 Assembler::cmpq(src1, Address(rscratch1, 0)); 567 } 568 } 569 570 int MacroAssembler::corrected_idivq(Register reg) { 571 // Full implementation of Java ldiv and lrem; checks for special 572 // case as described in JVM spec., p.243 & p.271. The function 573 // returns the (pc) offset of the idivl instruction - may be needed 574 // for implicit exceptions. 575 // 576 // normal case special case 577 // 578 // input : rax: dividend min_long 579 // reg: divisor (may not be eax/edx) -1 580 // 581 // output: rax: quotient (= rax idiv reg) min_long 582 // rdx: remainder (= rax irem reg) 0 583 assert(reg != rax && reg != rdx, "reg cannot be rax or rdx register"); 584 static const int64_t min_long = 0x8000000000000000; 585 Label normal_case, special_case; 586 587 // check for special case 588 cmp64(rax, ExternalAddress((address) &min_long)); 589 jcc(Assembler::notEqual, normal_case); 590 xorl(rdx, rdx); // prepare rdx for possible special case (where 591 // remainder = 0) 592 cmpq(reg, -1); 593 jcc(Assembler::equal, special_case); 594 595 // handle normal case 596 bind(normal_case); 597 cdqq(); 598 int idivq_offset = offset(); 599 idivq(reg); 600 601 // normal and special case exit 602 bind(special_case); 603 604 return idivq_offset; 605 } 606 607 void MacroAssembler::decrementq(Register reg, int value) { 608 if (value == min_jint) { subq(reg, value); return; } 609 if (value < 0) { incrementq(reg, -value); return; } 610 if (value == 0) { ; return; } 611 if (value == 1 && UseIncDec) { decq(reg) ; return; } 612 /* else */ { subq(reg, value) ; return; } 613 } 614 615 void MacroAssembler::decrementq(Address dst, int value) { 616 if (value == min_jint) { subq(dst, value); return; } 617 if (value < 0) { incrementq(dst, -value); return; } 618 if (value == 0) { ; return; } 619 if (value == 1 && UseIncDec) { decq(dst) ; return; } 620 /* else */ { subq(dst, value) ; return; } 621 } 622 623 void MacroAssembler::incrementq(AddressLiteral dst) { 624 if (reachable(dst)) { 625 incrementq(as_Address(dst)); 626 } else { 627 lea(rscratch1, dst); 628 incrementq(Address(rscratch1, 0)); 629 } 630 } 631 632 void MacroAssembler::incrementq(Register reg, int value) { 633 if (value == min_jint) { addq(reg, value); return; } 634 if (value < 0) { decrementq(reg, -value); return; } 635 if (value == 0) { ; return; } 636 if (value == 1 && UseIncDec) { incq(reg) ; return; } 637 /* else */ { addq(reg, value) ; return; } 638 } 639 640 void MacroAssembler::incrementq(Address dst, int value) { 641 if (value == min_jint) { addq(dst, value); return; } 642 if (value < 0) { decrementq(dst, -value); return; } 643 if (value == 0) { ; return; } 644 if (value == 1 && UseIncDec) { incq(dst) ; return; } 645 /* else */ { addq(dst, value) ; return; } 646 } 647 648 // 32bit can do a case table jump in one instruction but we no longer allow the base 649 // to be installed in the Address class 650 void MacroAssembler::jump(ArrayAddress entry) { 651 lea(rscratch1, entry.base()); 652 Address dispatch = entry.index(); 653 assert(dispatch._base == noreg, "must be"); 654 dispatch._base = rscratch1; 655 jmp(dispatch); 656 } 657 658 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) { 659 ShouldNotReachHere(); // 64bit doesn't use two regs 660 cmpq(x_lo, y_lo); 661 } 662 663 void MacroAssembler::lea(Register dst, AddressLiteral src) { 664 mov_literal64(dst, (intptr_t)src.target(), src.rspec()); 665 } 666 667 void MacroAssembler::lea(Address dst, AddressLiteral adr) { 668 mov_literal64(rscratch1, (intptr_t)adr.target(), adr.rspec()); 669 movptr(dst, rscratch1); 670 } 671 672 void MacroAssembler::leave() { 673 // %%% is this really better? Why not on 32bit too? 674 emit_int8((unsigned char)0xC9); // LEAVE 675 } 676 677 void MacroAssembler::lneg(Register hi, Register lo) { 678 ShouldNotReachHere(); // 64bit doesn't use two regs 679 negq(lo); 680 } 681 682 void MacroAssembler::movoop(Register dst, jobject obj) { 683 mov_literal64(dst, (intptr_t)obj, oop_Relocation::spec_for_immediate()); 684 } 685 686 void MacroAssembler::movoop(Address dst, jobject obj) { 687 mov_literal64(rscratch1, (intptr_t)obj, oop_Relocation::spec_for_immediate()); 688 movq(dst, rscratch1); 689 } 690 691 void MacroAssembler::mov_metadata(Register dst, Metadata* obj) { 692 mov_literal64(dst, (intptr_t)obj, metadata_Relocation::spec_for_immediate()); 693 } 694 695 void MacroAssembler::mov_metadata(Address dst, Metadata* obj) { 696 mov_literal64(rscratch1, (intptr_t)obj, metadata_Relocation::spec_for_immediate()); 697 movq(dst, rscratch1); 698 } 699 700 void MacroAssembler::movptr(Register dst, AddressLiteral src, Register scratch) { 701 if (src.is_lval()) { 702 mov_literal64(dst, (intptr_t)src.target(), src.rspec()); 703 } else { 704 if (reachable(src)) { 705 movq(dst, as_Address(src)); 706 } else { 707 lea(scratch, src); 708 movq(dst, Address(scratch, 0)); 709 } 710 } 711 } 712 713 void MacroAssembler::movptr(ArrayAddress dst, Register src) { 714 movq(as_Address(dst), src); 715 } 716 717 void MacroAssembler::movptr(Register dst, ArrayAddress src) { 718 movq(dst, as_Address(src)); 719 } 720 721 // src should NEVER be a real pointer. Use AddressLiteral for true pointers 722 void MacroAssembler::movptr(Address dst, intptr_t src) { 723 mov64(rscratch1, src); 724 movq(dst, rscratch1); 725 } 726 727 // These are mostly for initializing NULL 728 void MacroAssembler::movptr(Address dst, int32_t src) { 729 movslq(dst, src); 730 } 731 732 void MacroAssembler::movptr(Register dst, int32_t src) { 733 mov64(dst, (intptr_t)src); 734 } 735 736 void MacroAssembler::pushoop(jobject obj) { 737 movoop(rscratch1, obj); 738 push(rscratch1); 739 } 740 741 void MacroAssembler::pushklass(Metadata* obj) { 742 mov_metadata(rscratch1, obj); 743 push(rscratch1); 744 } 745 746 void MacroAssembler::pushptr(AddressLiteral src) { 747 lea(rscratch1, src); 748 if (src.is_lval()) { 749 push(rscratch1); 750 } else { 751 pushq(Address(rscratch1, 0)); 752 } 753 } 754 755 void MacroAssembler::reset_last_Java_frame(bool clear_fp, 756 bool clear_pc) { 757 // we must set sp to zero to clear frame 758 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), NULL_WORD); 759 // must clear fp, so that compiled frames are not confused; it is 760 // possible that we need it only for debugging 761 if (clear_fp) { 762 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()), NULL_WORD); 763 } 764 765 if (clear_pc) { 766 movptr(Address(r15_thread, JavaThread::last_Java_pc_offset()), NULL_WORD); 767 } 768 } 769 770 void MacroAssembler::set_last_Java_frame(Register last_java_sp, 771 Register last_java_fp, 772 address last_java_pc) { 773 // determine last_java_sp register 774 if (!last_java_sp->is_valid()) { 775 last_java_sp = rsp; 776 } 777 778 // last_java_fp is optional 779 if (last_java_fp->is_valid()) { 780 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()), 781 last_java_fp); 782 } 783 784 // last_java_pc is optional 785 if (last_java_pc != NULL) { 786 Address java_pc(r15_thread, 787 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset()); 788 lea(rscratch1, InternalAddress(last_java_pc)); 789 movptr(java_pc, rscratch1); 790 } 791 792 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), last_java_sp); 793 } 794 795 static void pass_arg0(MacroAssembler* masm, Register arg) { 796 if (c_rarg0 != arg ) { 797 masm->mov(c_rarg0, arg); 798 } 799 } 800 801 static void pass_arg1(MacroAssembler* masm, Register arg) { 802 if (c_rarg1 != arg ) { 803 masm->mov(c_rarg1, arg); 804 } 805 } 806 807 static void pass_arg2(MacroAssembler* masm, Register arg) { 808 if (c_rarg2 != arg ) { 809 masm->mov(c_rarg2, arg); 810 } 811 } 812 813 static void pass_arg3(MacroAssembler* masm, Register arg) { 814 if (c_rarg3 != arg ) { 815 masm->mov(c_rarg3, arg); 816 } 817 } 818 819 void MacroAssembler::stop(const char* msg) { 820 address rip = pc(); 821 pusha(); // get regs on stack 822 lea(c_rarg0, ExternalAddress((address) msg)); 823 lea(c_rarg1, InternalAddress(rip)); 824 movq(c_rarg2, rsp); // pass pointer to regs array 825 andq(rsp, -16); // align stack as required by ABI 826 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug64))); 827 hlt(); 828 } 829 830 void MacroAssembler::warn(const char* msg) { 831 push(rbp); 832 movq(rbp, rsp); 833 andq(rsp, -16); // align stack as required by push_CPU_state and call 834 push_CPU_state(); // keeps alignment at 16 bytes 835 lea(c_rarg0, ExternalAddress((address) msg)); 836 call_VM_leaf(CAST_FROM_FN_PTR(address, warning), c_rarg0); 837 pop_CPU_state(); 838 mov(rsp, rbp); 839 pop(rbp); 840 } 841 842 void MacroAssembler::print_state() { 843 address rip = pc(); 844 pusha(); // get regs on stack 845 push(rbp); 846 movq(rbp, rsp); 847 andq(rsp, -16); // align stack as required by push_CPU_state and call 848 push_CPU_state(); // keeps alignment at 16 bytes 849 850 lea(c_rarg0, InternalAddress(rip)); 851 lea(c_rarg1, Address(rbp, wordSize)); // pass pointer to regs array 852 call_VM_leaf(CAST_FROM_FN_PTR(address, MacroAssembler::print_state64), c_rarg0, c_rarg1); 853 854 pop_CPU_state(); 855 mov(rsp, rbp); 856 pop(rbp); 857 popa(); 858 } 859 860 #ifndef PRODUCT 861 extern "C" void findpc(intptr_t x); 862 #endif 863 864 void MacroAssembler::debug64(char* msg, int64_t pc, int64_t regs[]) { 865 // In order to get locks to work, we need to fake a in_VM state 866 if (ShowMessageBoxOnError) { 867 JavaThread* thread = JavaThread::current(); 868 JavaThreadState saved_state = thread->thread_state(); 869 thread->set_thread_state(_thread_in_vm); 870 #ifndef PRODUCT 871 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 872 ttyLocker ttyl; 873 BytecodeCounter::print(); 874 } 875 #endif 876 // To see where a verify_oop failed, get $ebx+40/X for this frame. 877 // XXX correct this offset for amd64 878 // This is the value of eip which points to where verify_oop will return. 879 if (os::message_box(msg, "Execution stopped, print registers?")) { 880 print_state64(pc, regs); 881 BREAKPOINT; 882 assert(false, "start up GDB"); 883 } 884 ThreadStateTransition::transition(thread, _thread_in_vm, saved_state); 885 } else { 886 ttyLocker ttyl; 887 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n", 888 msg); 889 assert(false, "DEBUG MESSAGE: %s", msg); 890 } 891 } 892 893 void MacroAssembler::print_state64(int64_t pc, int64_t regs[]) { 894 ttyLocker ttyl; 895 FlagSetting fs(Debugging, true); 896 tty->print_cr("rip = 0x%016lx", pc); 897 #ifndef PRODUCT 898 tty->cr(); 899 findpc(pc); 900 tty->cr(); 901 #endif 902 #define PRINT_REG(rax, value) \ 903 { tty->print("%s = ", #rax); os::print_location(tty, value); } 904 PRINT_REG(rax, regs[15]); 905 PRINT_REG(rbx, regs[12]); 906 PRINT_REG(rcx, regs[14]); 907 PRINT_REG(rdx, regs[13]); 908 PRINT_REG(rdi, regs[8]); 909 PRINT_REG(rsi, regs[9]); 910 PRINT_REG(rbp, regs[10]); 911 PRINT_REG(rsp, regs[11]); 912 PRINT_REG(r8 , regs[7]); 913 PRINT_REG(r9 , regs[6]); 914 PRINT_REG(r10, regs[5]); 915 PRINT_REG(r11, regs[4]); 916 PRINT_REG(r12, regs[3]); 917 PRINT_REG(r13, regs[2]); 918 PRINT_REG(r14, regs[1]); 919 PRINT_REG(r15, regs[0]); 920 #undef PRINT_REG 921 // Print some words near top of staack. 922 int64_t* rsp = (int64_t*) regs[11]; 923 int64_t* dump_sp = rsp; 924 for (int col1 = 0; col1 < 8; col1++) { 925 tty->print("(rsp+0x%03x) 0x%016lx: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (int64_t)dump_sp); 926 os::print_location(tty, *dump_sp++); 927 } 928 for (int row = 0; row < 25; row++) { 929 tty->print("(rsp+0x%03x) 0x%016lx: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (int64_t)dump_sp); 930 for (int col = 0; col < 4; col++) { 931 tty->print(" 0x%016lx", *dump_sp++); 932 } 933 tty->cr(); 934 } 935 // Print some instructions around pc: 936 Disassembler::decode((address)pc-64, (address)pc); 937 tty->print_cr("--------"); 938 Disassembler::decode((address)pc, (address)pc+32); 939 } 940 941 #endif // _LP64 942 943 // Now versions that are common to 32/64 bit 944 945 void MacroAssembler::addptr(Register dst, int32_t imm32) { 946 LP64_ONLY(addq(dst, imm32)) NOT_LP64(addl(dst, imm32)); 947 } 948 949 void MacroAssembler::addptr(Register dst, Register src) { 950 LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src)); 951 } 952 953 void MacroAssembler::addptr(Address dst, Register src) { 954 LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src)); 955 } 956 957 void MacroAssembler::addsd(XMMRegister dst, AddressLiteral src) { 958 if (reachable(src)) { 959 Assembler::addsd(dst, as_Address(src)); 960 } else { 961 lea(rscratch1, src); 962 Assembler::addsd(dst, Address(rscratch1, 0)); 963 } 964 } 965 966 void MacroAssembler::addss(XMMRegister dst, AddressLiteral src) { 967 if (reachable(src)) { 968 addss(dst, as_Address(src)); 969 } else { 970 lea(rscratch1, src); 971 addss(dst, Address(rscratch1, 0)); 972 } 973 } 974 975 void MacroAssembler::addpd(XMMRegister dst, AddressLiteral src) { 976 if (reachable(src)) { 977 Assembler::addpd(dst, as_Address(src)); 978 } else { 979 lea(rscratch1, src); 980 Assembler::addpd(dst, Address(rscratch1, 0)); 981 } 982 } 983 984 void MacroAssembler::align(int modulus) { 985 align(modulus, offset()); 986 } 987 988 void MacroAssembler::align(int modulus, int target) { 989 if (target % modulus != 0) { 990 nop(modulus - (target % modulus)); 991 } 992 } 993 994 void MacroAssembler::andpd(XMMRegister dst, AddressLiteral src) { 995 // Used in sign-masking with aligned address. 996 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes"); 997 if (reachable(src)) { 998 Assembler::andpd(dst, as_Address(src)); 999 } else { 1000 lea(rscratch1, src); 1001 Assembler::andpd(dst, Address(rscratch1, 0)); 1002 } 1003 } 1004 1005 void MacroAssembler::andps(XMMRegister dst, AddressLiteral src) { 1006 // Used in sign-masking with aligned address. 1007 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes"); 1008 if (reachable(src)) { 1009 Assembler::andps(dst, as_Address(src)); 1010 } else { 1011 lea(rscratch1, src); 1012 Assembler::andps(dst, Address(rscratch1, 0)); 1013 } 1014 } 1015 1016 void MacroAssembler::andptr(Register dst, int32_t imm32) { 1017 LP64_ONLY(andq(dst, imm32)) NOT_LP64(andl(dst, imm32)); 1018 } 1019 1020 void MacroAssembler::atomic_incl(Address counter_addr) { 1021 if (os::is_MP()) 1022 lock(); 1023 incrementl(counter_addr); 1024 } 1025 1026 void MacroAssembler::atomic_incl(AddressLiteral counter_addr, Register scr) { 1027 if (reachable(counter_addr)) { 1028 atomic_incl(as_Address(counter_addr)); 1029 } else { 1030 lea(scr, counter_addr); 1031 atomic_incl(Address(scr, 0)); 1032 } 1033 } 1034 1035 #ifdef _LP64 1036 void MacroAssembler::atomic_incq(Address counter_addr) { 1037 if (os::is_MP()) 1038 lock(); 1039 incrementq(counter_addr); 1040 } 1041 1042 void MacroAssembler::atomic_incq(AddressLiteral counter_addr, Register scr) { 1043 if (reachable(counter_addr)) { 1044 atomic_incq(as_Address(counter_addr)); 1045 } else { 1046 lea(scr, counter_addr); 1047 atomic_incq(Address(scr, 0)); 1048 } 1049 } 1050 #endif 1051 1052 // Writes to stack successive pages until offset reached to check for 1053 // stack overflow + shadow pages. This clobbers tmp. 1054 void MacroAssembler::bang_stack_size(Register size, Register tmp) { 1055 movptr(tmp, rsp); 1056 // Bang stack for total size given plus shadow page size. 1057 // Bang one page at a time because large size can bang beyond yellow and 1058 // red zones. 1059 Label loop; 1060 bind(loop); 1061 movl(Address(tmp, (-os::vm_page_size())), size ); 1062 subptr(tmp, os::vm_page_size()); 1063 subl(size, os::vm_page_size()); 1064 jcc(Assembler::greater, loop); 1065 1066 // Bang down shadow pages too. 1067 // At this point, (tmp-0) is the last address touched, so don't 1068 // touch it again. (It was touched as (tmp-pagesize) but then tmp 1069 // was post-decremented.) Skip this address by starting at i=1, and 1070 // touch a few more pages below. N.B. It is important to touch all 1071 // the way down to and including i=StackShadowPages. 1072 for (int i = 1; i < StackShadowPages; i++) { 1073 // this could be any sized move but this is can be a debugging crumb 1074 // so the bigger the better. 1075 movptr(Address(tmp, (-i*os::vm_page_size())), size ); 1076 } 1077 } 1078 1079 void MacroAssembler::reserved_stack_check() { 1080 // testing if reserved zone needs to be enabled 1081 Label no_reserved_zone_enabling; 1082 Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread); 1083 NOT_LP64(get_thread(rsi);) 1084 1085 cmpptr(rsp, Address(thread, JavaThread::reserved_stack_activation_offset())); 1086 jcc(Assembler::below, no_reserved_zone_enabling); 1087 1088 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), thread); 1089 jump(RuntimeAddress(StubRoutines::throw_delayed_StackOverflowError_entry())); 1090 should_not_reach_here(); 1091 1092 bind(no_reserved_zone_enabling); 1093 } 1094 1095 int MacroAssembler::biased_locking_enter(Register lock_reg, 1096 Register obj_reg, 1097 Register swap_reg, 1098 Register tmp_reg, 1099 bool swap_reg_contains_mark, 1100 Label& done, 1101 Label* slow_case, 1102 BiasedLockingCounters* counters) { 1103 assert(UseBiasedLocking, "why call this otherwise?"); 1104 assert(swap_reg == rax, "swap_reg must be rax for cmpxchgq"); 1105 assert(tmp_reg != noreg, "tmp_reg must be supplied"); 1106 assert_different_registers(lock_reg, obj_reg, swap_reg, tmp_reg); 1107 assert(markOopDesc::age_shift == markOopDesc::lock_bits + markOopDesc::biased_lock_bits, "biased locking makes assumptions about bit layout"); 1108 Address mark_addr (obj_reg, oopDesc::mark_offset_in_bytes()); 1109 Address saved_mark_addr(lock_reg, 0); 1110 1111 if (PrintBiasedLockingStatistics && counters == NULL) { 1112 counters = BiasedLocking::counters(); 1113 } 1114 // Biased locking 1115 // See whether the lock is currently biased toward our thread and 1116 // whether the epoch is still valid 1117 // Note that the runtime guarantees sufficient alignment of JavaThread 1118 // pointers to allow age to be placed into low bits 1119 // First check to see whether biasing is even enabled for this object 1120 Label cas_label; 1121 int null_check_offset = -1; 1122 if (!swap_reg_contains_mark) { 1123 null_check_offset = offset(); 1124 movptr(swap_reg, mark_addr); 1125 } 1126 movptr(tmp_reg, swap_reg); 1127 andptr(tmp_reg, markOopDesc::biased_lock_mask_in_place); 1128 cmpptr(tmp_reg, markOopDesc::biased_lock_pattern); 1129 jcc(Assembler::notEqual, cas_label); 1130 // The bias pattern is present in the object's header. Need to check 1131 // whether the bias owner and the epoch are both still current. 1132 #ifndef _LP64 1133 // Note that because there is no current thread register on x86_32 we 1134 // need to store off the mark word we read out of the object to 1135 // avoid reloading it and needing to recheck invariants below. This 1136 // store is unfortunate but it makes the overall code shorter and 1137 // simpler. 1138 movptr(saved_mark_addr, swap_reg); 1139 #endif 1140 if (swap_reg_contains_mark) { 1141 null_check_offset = offset(); 1142 } 1143 load_prototype_header(tmp_reg, obj_reg); 1144 #ifdef _LP64 1145 orptr(tmp_reg, r15_thread); 1146 xorptr(tmp_reg, swap_reg); 1147 Register header_reg = tmp_reg; 1148 #else 1149 xorptr(tmp_reg, swap_reg); 1150 get_thread(swap_reg); 1151 xorptr(swap_reg, tmp_reg); 1152 Register header_reg = swap_reg; 1153 #endif 1154 andptr(header_reg, ~((int) markOopDesc::age_mask_in_place)); 1155 if (counters != NULL) { 1156 cond_inc32(Assembler::zero, 1157 ExternalAddress((address) counters->biased_lock_entry_count_addr())); 1158 } 1159 jcc(Assembler::equal, done); 1160 1161 Label try_revoke_bias; 1162 Label try_rebias; 1163 1164 // At this point we know that the header has the bias pattern and 1165 // that we are not the bias owner in the current epoch. We need to 1166 // figure out more details about the state of the header in order to 1167 // know what operations can be legally performed on the object's 1168 // header. 1169 1170 // If the low three bits in the xor result aren't clear, that means 1171 // the prototype header is no longer biased and we have to revoke 1172 // the bias on this object. 1173 testptr(header_reg, markOopDesc::biased_lock_mask_in_place); 1174 jccb(Assembler::notZero, try_revoke_bias); 1175 1176 // Biasing is still enabled for this data type. See whether the 1177 // epoch of the current bias is still valid, meaning that the epoch 1178 // bits of the mark word are equal to the epoch bits of the 1179 // prototype header. (Note that the prototype header's epoch bits 1180 // only change at a safepoint.) If not, attempt to rebias the object 1181 // toward the current thread. Note that we must be absolutely sure 1182 // that the current epoch is invalid in order to do this because 1183 // otherwise the manipulations it performs on the mark word are 1184 // illegal. 1185 testptr(header_reg, markOopDesc::epoch_mask_in_place); 1186 jccb(Assembler::notZero, try_rebias); 1187 1188 // The epoch of the current bias is still valid but we know nothing 1189 // about the owner; it might be set or it might be clear. Try to 1190 // acquire the bias of the object using an atomic operation. If this 1191 // fails we will go in to the runtime to revoke the object's bias. 1192 // Note that we first construct the presumed unbiased header so we 1193 // don't accidentally blow away another thread's valid bias. 1194 NOT_LP64( movptr(swap_reg, saved_mark_addr); ) 1195 andptr(swap_reg, 1196 markOopDesc::biased_lock_mask_in_place | markOopDesc::age_mask_in_place | markOopDesc::epoch_mask_in_place); 1197 #ifdef _LP64 1198 movptr(tmp_reg, swap_reg); 1199 orptr(tmp_reg, r15_thread); 1200 #else 1201 get_thread(tmp_reg); 1202 orptr(tmp_reg, swap_reg); 1203 #endif 1204 if (os::is_MP()) { 1205 lock(); 1206 } 1207 cmpxchgptr(tmp_reg, mark_addr); // compare tmp_reg and swap_reg 1208 // If the biasing toward our thread failed, this means that 1209 // another thread succeeded in biasing it toward itself and we 1210 // need to revoke that bias. The revocation will occur in the 1211 // interpreter runtime in the slow case. 1212 if (counters != NULL) { 1213 cond_inc32(Assembler::zero, 1214 ExternalAddress((address) counters->anonymously_biased_lock_entry_count_addr())); 1215 } 1216 if (slow_case != NULL) { 1217 jcc(Assembler::notZero, *slow_case); 1218 } 1219 jmp(done); 1220 1221 bind(try_rebias); 1222 // At this point we know the epoch has expired, meaning that the 1223 // current "bias owner", if any, is actually invalid. Under these 1224 // circumstances _only_, we are allowed to use the current header's 1225 // value as the comparison value when doing the cas to acquire the 1226 // bias in the current epoch. In other words, we allow transfer of 1227 // the bias from one thread to another directly in this situation. 1228 // 1229 // FIXME: due to a lack of registers we currently blow away the age 1230 // bits in this situation. Should attempt to preserve them. 1231 load_prototype_header(tmp_reg, obj_reg); 1232 #ifdef _LP64 1233 orptr(tmp_reg, r15_thread); 1234 #else 1235 get_thread(swap_reg); 1236 orptr(tmp_reg, swap_reg); 1237 movptr(swap_reg, saved_mark_addr); 1238 #endif 1239 if (os::is_MP()) { 1240 lock(); 1241 } 1242 cmpxchgptr(tmp_reg, mark_addr); // compare tmp_reg and swap_reg 1243 // If the biasing toward our thread failed, then another thread 1244 // succeeded in biasing it toward itself and we need to revoke that 1245 // bias. The revocation will occur in the runtime in the slow case. 1246 if (counters != NULL) { 1247 cond_inc32(Assembler::zero, 1248 ExternalAddress((address) counters->rebiased_lock_entry_count_addr())); 1249 } 1250 if (slow_case != NULL) { 1251 jcc(Assembler::notZero, *slow_case); 1252 } 1253 jmp(done); 1254 1255 bind(try_revoke_bias); 1256 // The prototype mark in the klass doesn't have the bias bit set any 1257 // more, indicating that objects of this data type are not supposed 1258 // to be biased any more. We are going to try to reset the mark of 1259 // this object to the prototype value and fall through to the 1260 // CAS-based locking scheme. Note that if our CAS fails, it means 1261 // that another thread raced us for the privilege of revoking the 1262 // bias of this particular object, so it's okay to continue in the 1263 // normal locking code. 1264 // 1265 // FIXME: due to a lack of registers we currently blow away the age 1266 // bits in this situation. Should attempt to preserve them. 1267 NOT_LP64( movptr(swap_reg, saved_mark_addr); ) 1268 load_prototype_header(tmp_reg, obj_reg); 1269 if (os::is_MP()) { 1270 lock(); 1271 } 1272 cmpxchgptr(tmp_reg, mark_addr); // compare tmp_reg and swap_reg 1273 // Fall through to the normal CAS-based lock, because no matter what 1274 // the result of the above CAS, some thread must have succeeded in 1275 // removing the bias bit from the object's header. 1276 if (counters != NULL) { 1277 cond_inc32(Assembler::zero, 1278 ExternalAddress((address) counters->revoked_lock_entry_count_addr())); 1279 } 1280 1281 bind(cas_label); 1282 1283 return null_check_offset; 1284 } 1285 1286 void MacroAssembler::biased_locking_exit(Register obj_reg, Register temp_reg, Label& done) { 1287 assert(UseBiasedLocking, "why call this otherwise?"); 1288 1289 // Check for biased locking unlock case, which is a no-op 1290 // Note: we do not have to check the thread ID for two reasons. 1291 // First, the interpreter checks for IllegalMonitorStateException at 1292 // a higher level. Second, if the bias was revoked while we held the 1293 // lock, the object could not be rebiased toward another thread, so 1294 // the bias bit would be clear. 1295 movptr(temp_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes())); 1296 andptr(temp_reg, markOopDesc::biased_lock_mask_in_place); 1297 cmpptr(temp_reg, markOopDesc::biased_lock_pattern); 1298 jcc(Assembler::equal, done); 1299 } 1300 1301 #ifdef COMPILER2 1302 1303 #if INCLUDE_RTM_OPT 1304 1305 // Update rtm_counters based on abort status 1306 // input: abort_status 1307 // rtm_counters (RTMLockingCounters*) 1308 // flags are killed 1309 void MacroAssembler::rtm_counters_update(Register abort_status, Register rtm_counters) { 1310 1311 atomic_incptr(Address(rtm_counters, RTMLockingCounters::abort_count_offset())); 1312 if (PrintPreciseRTMLockingStatistics) { 1313 for (int i = 0; i < RTMLockingCounters::ABORT_STATUS_LIMIT; i++) { 1314 Label check_abort; 1315 testl(abort_status, (1<<i)); 1316 jccb(Assembler::equal, check_abort); 1317 atomic_incptr(Address(rtm_counters, RTMLockingCounters::abortX_count_offset() + (i * sizeof(uintx)))); 1318 bind(check_abort); 1319 } 1320 } 1321 } 1322 1323 // Branch if (random & (count-1) != 0), count is 2^n 1324 // tmp, scr and flags are killed 1325 void MacroAssembler::branch_on_random_using_rdtsc(Register tmp, Register scr, int count, Label& brLabel) { 1326 assert(tmp == rax, ""); 1327 assert(scr == rdx, ""); 1328 rdtsc(); // modifies EDX:EAX 1329 andptr(tmp, count-1); 1330 jccb(Assembler::notZero, brLabel); 1331 } 1332 1333 // Perform abort ratio calculation, set no_rtm bit if high ratio 1334 // input: rtm_counters_Reg (RTMLockingCounters* address) 1335 // tmpReg, rtm_counters_Reg and flags are killed 1336 void MacroAssembler::rtm_abort_ratio_calculation(Register tmpReg, 1337 Register rtm_counters_Reg, 1338 RTMLockingCounters* rtm_counters, 1339 Metadata* method_data) { 1340 Label L_done, L_check_always_rtm1, L_check_always_rtm2; 1341 1342 if (RTMLockingCalculationDelay > 0) { 1343 // Delay calculation 1344 movptr(tmpReg, ExternalAddress((address) RTMLockingCounters::rtm_calculation_flag_addr()), tmpReg); 1345 testptr(tmpReg, tmpReg); 1346 jccb(Assembler::equal, L_done); 1347 } 1348 // Abort ratio calculation only if abort_count > RTMAbortThreshold 1349 // Aborted transactions = abort_count * 100 1350 // All transactions = total_count * RTMTotalCountIncrRate 1351 // Set no_rtm bit if (Aborted transactions >= All transactions * RTMAbortRatio) 1352 1353 movptr(tmpReg, Address(rtm_counters_Reg, RTMLockingCounters::abort_count_offset())); 1354 cmpptr(tmpReg, RTMAbortThreshold); 1355 jccb(Assembler::below, L_check_always_rtm2); 1356 imulptr(tmpReg, tmpReg, 100); 1357 1358 Register scrReg = rtm_counters_Reg; 1359 movptr(scrReg, Address(rtm_counters_Reg, RTMLockingCounters::total_count_offset())); 1360 imulptr(scrReg, scrReg, RTMTotalCountIncrRate); 1361 imulptr(scrReg, scrReg, RTMAbortRatio); 1362 cmpptr(tmpReg, scrReg); 1363 jccb(Assembler::below, L_check_always_rtm1); 1364 if (method_data != NULL) { 1365 // set rtm_state to "no rtm" in MDO 1366 mov_metadata(tmpReg, method_data); 1367 if (os::is_MP()) { 1368 lock(); 1369 } 1370 orl(Address(tmpReg, MethodData::rtm_state_offset_in_bytes()), NoRTM); 1371 } 1372 jmpb(L_done); 1373 bind(L_check_always_rtm1); 1374 // Reload RTMLockingCounters* address 1375 lea(rtm_counters_Reg, ExternalAddress((address)rtm_counters)); 1376 bind(L_check_always_rtm2); 1377 movptr(tmpReg, Address(rtm_counters_Reg, RTMLockingCounters::total_count_offset())); 1378 cmpptr(tmpReg, RTMLockingThreshold / RTMTotalCountIncrRate); 1379 jccb(Assembler::below, L_done); 1380 if (method_data != NULL) { 1381 // set rtm_state to "always rtm" in MDO 1382 mov_metadata(tmpReg, method_data); 1383 if (os::is_MP()) { 1384 lock(); 1385 } 1386 orl(Address(tmpReg, MethodData::rtm_state_offset_in_bytes()), UseRTM); 1387 } 1388 bind(L_done); 1389 } 1390 1391 // Update counters and perform abort ratio calculation 1392 // input: abort_status_Reg 1393 // rtm_counters_Reg, flags are killed 1394 void MacroAssembler::rtm_profiling(Register abort_status_Reg, 1395 Register rtm_counters_Reg, 1396 RTMLockingCounters* rtm_counters, 1397 Metadata* method_data, 1398 bool profile_rtm) { 1399 1400 assert(rtm_counters != NULL, "should not be NULL when profiling RTM"); 1401 // update rtm counters based on rax value at abort 1402 // reads abort_status_Reg, updates flags 1403 lea(rtm_counters_Reg, ExternalAddress((address)rtm_counters)); 1404 rtm_counters_update(abort_status_Reg, rtm_counters_Reg); 1405 if (profile_rtm) { 1406 // Save abort status because abort_status_Reg is used by following code. 1407 if (RTMRetryCount > 0) { 1408 push(abort_status_Reg); 1409 } 1410 assert(rtm_counters != NULL, "should not be NULL when profiling RTM"); 1411 rtm_abort_ratio_calculation(abort_status_Reg, rtm_counters_Reg, rtm_counters, method_data); 1412 // restore abort status 1413 if (RTMRetryCount > 0) { 1414 pop(abort_status_Reg); 1415 } 1416 } 1417 } 1418 1419 // Retry on abort if abort's status is 0x6: can retry (0x2) | memory conflict (0x4) 1420 // inputs: retry_count_Reg 1421 // : abort_status_Reg 1422 // output: retry_count_Reg decremented by 1 1423 // flags are killed 1424 void MacroAssembler::rtm_retry_lock_on_abort(Register retry_count_Reg, Register abort_status_Reg, Label& retryLabel) { 1425 Label doneRetry; 1426 assert(abort_status_Reg == rax, ""); 1427 // The abort reason bits are in eax (see all states in rtmLocking.hpp) 1428 // 0x6 = conflict on which we can retry (0x2) | memory conflict (0x4) 1429 // if reason is in 0x6 and retry count != 0 then retry 1430 andptr(abort_status_Reg, 0x6); 1431 jccb(Assembler::zero, doneRetry); 1432 testl(retry_count_Reg, retry_count_Reg); 1433 jccb(Assembler::zero, doneRetry); 1434 pause(); 1435 decrementl(retry_count_Reg); 1436 jmp(retryLabel); 1437 bind(doneRetry); 1438 } 1439 1440 // Spin and retry if lock is busy, 1441 // inputs: box_Reg (monitor address) 1442 // : retry_count_Reg 1443 // output: retry_count_Reg decremented by 1 1444 // : clear z flag if retry count exceeded 1445 // tmp_Reg, scr_Reg, flags are killed 1446 void MacroAssembler::rtm_retry_lock_on_busy(Register retry_count_Reg, Register box_Reg, 1447 Register tmp_Reg, Register scr_Reg, Label& retryLabel) { 1448 Label SpinLoop, SpinExit, doneRetry; 1449 int owner_offset = OM_OFFSET_NO_MONITOR_VALUE_TAG(owner); 1450 1451 testl(retry_count_Reg, retry_count_Reg); 1452 jccb(Assembler::zero, doneRetry); 1453 decrementl(retry_count_Reg); 1454 movptr(scr_Reg, RTMSpinLoopCount); 1455 1456 bind(SpinLoop); 1457 pause(); 1458 decrementl(scr_Reg); 1459 jccb(Assembler::lessEqual, SpinExit); 1460 movptr(tmp_Reg, Address(box_Reg, owner_offset)); 1461 testptr(tmp_Reg, tmp_Reg); 1462 jccb(Assembler::notZero, SpinLoop); 1463 1464 bind(SpinExit); 1465 jmp(retryLabel); 1466 bind(doneRetry); 1467 incrementl(retry_count_Reg); // clear z flag 1468 } 1469 1470 // Use RTM for normal stack locks 1471 // Input: objReg (object to lock) 1472 void MacroAssembler::rtm_stack_locking(Register objReg, Register tmpReg, Register scrReg, 1473 Register retry_on_abort_count_Reg, 1474 RTMLockingCounters* stack_rtm_counters, 1475 Metadata* method_data, bool profile_rtm, 1476 Label& DONE_LABEL, Label& IsInflated) { 1477 assert(UseRTMForStackLocks, "why call this otherwise?"); 1478 assert(!UseBiasedLocking, "Biased locking is not supported with RTM locking"); 1479 assert(tmpReg == rax, ""); 1480 assert(scrReg == rdx, ""); 1481 Label L_rtm_retry, L_decrement_retry, L_on_abort; 1482 1483 if (RTMRetryCount > 0) { 1484 movl(retry_on_abort_count_Reg, RTMRetryCount); // Retry on abort 1485 bind(L_rtm_retry); 1486 } 1487 movptr(tmpReg, Address(objReg, 0)); 1488 testptr(tmpReg, markOopDesc::monitor_value); // inflated vs stack-locked|neutral|biased 1489 jcc(Assembler::notZero, IsInflated); 1490 1491 if (PrintPreciseRTMLockingStatistics || profile_rtm) { 1492 Label L_noincrement; 1493 if (RTMTotalCountIncrRate > 1) { 1494 // tmpReg, scrReg and flags are killed 1495 branch_on_random_using_rdtsc(tmpReg, scrReg, (int)RTMTotalCountIncrRate, L_noincrement); 1496 } 1497 assert(stack_rtm_counters != NULL, "should not be NULL when profiling RTM"); 1498 atomic_incptr(ExternalAddress((address)stack_rtm_counters->total_count_addr()), scrReg); 1499 bind(L_noincrement); 1500 } 1501 xbegin(L_on_abort); 1502 movptr(tmpReg, Address(objReg, 0)); // fetch markword 1503 andptr(tmpReg, markOopDesc::biased_lock_mask_in_place); // look at 3 lock bits 1504 cmpptr(tmpReg, markOopDesc::unlocked_value); // bits = 001 unlocked 1505 jcc(Assembler::equal, DONE_LABEL); // all done if unlocked 1506 1507 Register abort_status_Reg = tmpReg; // status of abort is stored in RAX 1508 if (UseRTMXendForLockBusy) { 1509 xend(); 1510 movptr(abort_status_Reg, 0x2); // Set the abort status to 2 (so we can retry) 1511 jmp(L_decrement_retry); 1512 } 1513 else { 1514 xabort(0); 1515 } 1516 bind(L_on_abort); 1517 if (PrintPreciseRTMLockingStatistics || profile_rtm) { 1518 rtm_profiling(abort_status_Reg, scrReg, stack_rtm_counters, method_data, profile_rtm); 1519 } 1520 bind(L_decrement_retry); 1521 if (RTMRetryCount > 0) { 1522 // retry on lock abort if abort status is 'can retry' (0x2) or 'memory conflict' (0x4) 1523 rtm_retry_lock_on_abort(retry_on_abort_count_Reg, abort_status_Reg, L_rtm_retry); 1524 } 1525 } 1526 1527 // Use RTM for inflating locks 1528 // inputs: objReg (object to lock) 1529 // boxReg (on-stack box address (displaced header location) - KILLED) 1530 // tmpReg (ObjectMonitor address + markOopDesc::monitor_value) 1531 void MacroAssembler::rtm_inflated_locking(Register objReg, Register boxReg, Register tmpReg, 1532 Register scrReg, Register retry_on_busy_count_Reg, 1533 Register retry_on_abort_count_Reg, 1534 RTMLockingCounters* rtm_counters, 1535 Metadata* method_data, bool profile_rtm, 1536 Label& DONE_LABEL) { 1537 assert(UseRTMLocking, "why call this otherwise?"); 1538 assert(tmpReg == rax, ""); 1539 assert(scrReg == rdx, ""); 1540 Label L_rtm_retry, L_decrement_retry, L_on_abort; 1541 int owner_offset = OM_OFFSET_NO_MONITOR_VALUE_TAG(owner); 1542 1543 // Without cast to int32_t a movptr will destroy r10 which is typically obj 1544 movptr(Address(boxReg, 0), (int32_t)intptr_t(markOopDesc::unused_mark())); 1545 movptr(boxReg, tmpReg); // Save ObjectMonitor address 1546 1547 if (RTMRetryCount > 0) { 1548 movl(retry_on_busy_count_Reg, RTMRetryCount); // Retry on lock busy 1549 movl(retry_on_abort_count_Reg, RTMRetryCount); // Retry on abort 1550 bind(L_rtm_retry); 1551 } 1552 if (PrintPreciseRTMLockingStatistics || profile_rtm) { 1553 Label L_noincrement; 1554 if (RTMTotalCountIncrRate > 1) { 1555 // tmpReg, scrReg and flags are killed 1556 branch_on_random_using_rdtsc(tmpReg, scrReg, (int)RTMTotalCountIncrRate, L_noincrement); 1557 } 1558 assert(rtm_counters != NULL, "should not be NULL when profiling RTM"); 1559 atomic_incptr(ExternalAddress((address)rtm_counters->total_count_addr()), scrReg); 1560 bind(L_noincrement); 1561 } 1562 xbegin(L_on_abort); 1563 movptr(tmpReg, Address(objReg, 0)); 1564 movptr(tmpReg, Address(tmpReg, owner_offset)); 1565 testptr(tmpReg, tmpReg); 1566 jcc(Assembler::zero, DONE_LABEL); 1567 if (UseRTMXendForLockBusy) { 1568 xend(); 1569 jmp(L_decrement_retry); 1570 } 1571 else { 1572 xabort(0); 1573 } 1574 bind(L_on_abort); 1575 Register abort_status_Reg = tmpReg; // status of abort is stored in RAX 1576 if (PrintPreciseRTMLockingStatistics || profile_rtm) { 1577 rtm_profiling(abort_status_Reg, scrReg, rtm_counters, method_data, profile_rtm); 1578 } 1579 if (RTMRetryCount > 0) { 1580 // retry on lock abort if abort status is 'can retry' (0x2) or 'memory conflict' (0x4) 1581 rtm_retry_lock_on_abort(retry_on_abort_count_Reg, abort_status_Reg, L_rtm_retry); 1582 } 1583 1584 movptr(tmpReg, Address(boxReg, owner_offset)) ; 1585 testptr(tmpReg, tmpReg) ; 1586 jccb(Assembler::notZero, L_decrement_retry) ; 1587 1588 // Appears unlocked - try to swing _owner from null to non-null. 1589 // Invariant: tmpReg == 0. tmpReg is EAX which is the implicit cmpxchg comparand. 1590 #ifdef _LP64 1591 Register threadReg = r15_thread; 1592 #else 1593 get_thread(scrReg); 1594 Register threadReg = scrReg; 1595 #endif 1596 if (os::is_MP()) { 1597 lock(); 1598 } 1599 cmpxchgptr(threadReg, Address(boxReg, owner_offset)); // Updates tmpReg 1600 1601 if (RTMRetryCount > 0) { 1602 // success done else retry 1603 jccb(Assembler::equal, DONE_LABEL) ; 1604 bind(L_decrement_retry); 1605 // Spin and retry if lock is busy. 1606 rtm_retry_lock_on_busy(retry_on_busy_count_Reg, boxReg, tmpReg, scrReg, L_rtm_retry); 1607 } 1608 else { 1609 bind(L_decrement_retry); 1610 } 1611 } 1612 1613 #endif // INCLUDE_RTM_OPT 1614 1615 // Fast_Lock and Fast_Unlock used by C2 1616 1617 // Because the transitions from emitted code to the runtime 1618 // monitorenter/exit helper stubs are so slow it's critical that 1619 // we inline both the stack-locking fast-path and the inflated fast path. 1620 // 1621 // See also: cmpFastLock and cmpFastUnlock. 1622 // 1623 // What follows is a specialized inline transliteration of the code 1624 // in slow_enter() and slow_exit(). If we're concerned about I$ bloat 1625 // another option would be to emit TrySlowEnter and TrySlowExit methods 1626 // at startup-time. These methods would accept arguments as 1627 // (rax,=Obj, rbx=Self, rcx=box, rdx=Scratch) and return success-failure 1628 // indications in the icc.ZFlag. Fast_Lock and Fast_Unlock would simply 1629 // marshal the arguments and emit calls to TrySlowEnter and TrySlowExit. 1630 // In practice, however, the # of lock sites is bounded and is usually small. 1631 // Besides the call overhead, TrySlowEnter and TrySlowExit might suffer 1632 // if the processor uses simple bimodal branch predictors keyed by EIP 1633 // Since the helper routines would be called from multiple synchronization 1634 // sites. 1635 // 1636 // An even better approach would be write "MonitorEnter()" and "MonitorExit()" 1637 // in java - using j.u.c and unsafe - and just bind the lock and unlock sites 1638 // to those specialized methods. That'd give us a mostly platform-independent 1639 // implementation that the JITs could optimize and inline at their pleasure. 1640 // Done correctly, the only time we'd need to cross to native could would be 1641 // to park() or unpark() threads. We'd also need a few more unsafe operators 1642 // to (a) prevent compiler-JIT reordering of non-volatile accesses, and 1643 // (b) explicit barriers or fence operations. 1644 // 1645 // TODO: 1646 // 1647 // * Arrange for C2 to pass "Self" into Fast_Lock and Fast_Unlock in one of the registers (scr). 1648 // This avoids manifesting the Self pointer in the Fast_Lock and Fast_Unlock terminals. 1649 // Given TLAB allocation, Self is usually manifested in a register, so passing it into 1650 // the lock operators would typically be faster than reifying Self. 1651 // 1652 // * Ideally I'd define the primitives as: 1653 // fast_lock (nax Obj, nax box, EAX tmp, nax scr) where box, tmp and scr are KILLED. 1654 // fast_unlock (nax Obj, EAX box, nax tmp) where box and tmp are KILLED 1655 // Unfortunately ADLC bugs prevent us from expressing the ideal form. 1656 // Instead, we're stuck with a rather awkward and brittle register assignments below. 1657 // Furthermore the register assignments are overconstrained, possibly resulting in 1658 // sub-optimal code near the synchronization site. 1659 // 1660 // * Eliminate the sp-proximity tests and just use "== Self" tests instead. 1661 // Alternately, use a better sp-proximity test. 1662 // 1663 // * Currently ObjectMonitor._Owner can hold either an sp value or a (THREAD *) value. 1664 // Either one is sufficient to uniquely identify a thread. 1665 // TODO: eliminate use of sp in _owner and use get_thread(tr) instead. 1666 // 1667 // * Intrinsify notify() and notifyAll() for the common cases where the 1668 // object is locked by the calling thread but the waitlist is empty. 1669 // avoid the expensive JNI call to JVM_Notify() and JVM_NotifyAll(). 1670 // 1671 // * use jccb and jmpb instead of jcc and jmp to improve code density. 1672 // But beware of excessive branch density on AMD Opterons. 1673 // 1674 // * Both Fast_Lock and Fast_Unlock set the ICC.ZF to indicate success 1675 // or failure of the fast-path. If the fast-path fails then we pass 1676 // control to the slow-path, typically in C. In Fast_Lock and 1677 // Fast_Unlock we often branch to DONE_LABEL, just to find that C2 1678 // will emit a conditional branch immediately after the node. 1679 // So we have branches to branches and lots of ICC.ZF games. 1680 // Instead, it might be better to have C2 pass a "FailureLabel" 1681 // into Fast_Lock and Fast_Unlock. In the case of success, control 1682 // will drop through the node. ICC.ZF is undefined at exit. 1683 // In the case of failure, the node will branch directly to the 1684 // FailureLabel 1685 1686 1687 // obj: object to lock 1688 // box: on-stack box address (displaced header location) - KILLED 1689 // rax,: tmp -- KILLED 1690 // scr: tmp -- KILLED 1691 void MacroAssembler::fast_lock(Register objReg, Register boxReg, Register tmpReg, 1692 Register scrReg, Register cx1Reg, Register cx2Reg, 1693 BiasedLockingCounters* counters, 1694 RTMLockingCounters* rtm_counters, 1695 RTMLockingCounters* stack_rtm_counters, 1696 Metadata* method_data, 1697 bool use_rtm, bool profile_rtm) { 1698 // Ensure the register assignents are disjoint 1699 assert(tmpReg == rax, ""); 1700 1701 if (use_rtm) { 1702 assert_different_registers(objReg, boxReg, tmpReg, scrReg, cx1Reg, cx2Reg); 1703 } else { 1704 assert(cx1Reg == noreg, ""); 1705 assert(cx2Reg == noreg, ""); 1706 assert_different_registers(objReg, boxReg, tmpReg, scrReg); 1707 } 1708 1709 if (counters != NULL) { 1710 atomic_incl(ExternalAddress((address)counters->total_entry_count_addr()), scrReg); 1711 } 1712 if (EmitSync & 1) { 1713 // set box->dhw = markOopDesc::unused_mark() 1714 // Force all sync thru slow-path: slow_enter() and slow_exit() 1715 movptr (Address(boxReg, 0), (int32_t)intptr_t(markOopDesc::unused_mark())); 1716 cmpptr (rsp, (int32_t)NULL_WORD); 1717 } else { 1718 // Possible cases that we'll encounter in fast_lock 1719 // ------------------------------------------------ 1720 // * Inflated 1721 // -- unlocked 1722 // -- Locked 1723 // = by self 1724 // = by other 1725 // * biased 1726 // -- by Self 1727 // -- by other 1728 // * neutral 1729 // * stack-locked 1730 // -- by self 1731 // = sp-proximity test hits 1732 // = sp-proximity test generates false-negative 1733 // -- by other 1734 // 1735 1736 Label IsInflated, DONE_LABEL; 1737 1738 // it's stack-locked, biased or neutral 1739 // TODO: optimize away redundant LDs of obj->mark and improve the markword triage 1740 // order to reduce the number of conditional branches in the most common cases. 1741 // Beware -- there's a subtle invariant that fetch of the markword 1742 // at [FETCH], below, will never observe a biased encoding (*101b). 1743 // If this invariant is not held we risk exclusion (safety) failure. 1744 if (UseBiasedLocking && !UseOptoBiasInlining) { 1745 biased_locking_enter(boxReg, objReg, tmpReg, scrReg, false, DONE_LABEL, NULL, counters); 1746 } 1747 1748 #if INCLUDE_RTM_OPT 1749 if (UseRTMForStackLocks && use_rtm) { 1750 rtm_stack_locking(objReg, tmpReg, scrReg, cx2Reg, 1751 stack_rtm_counters, method_data, profile_rtm, 1752 DONE_LABEL, IsInflated); 1753 } 1754 #endif // INCLUDE_RTM_OPT 1755 1756 movptr(tmpReg, Address(objReg, 0)); // [FETCH] 1757 testptr(tmpReg, markOopDesc::monitor_value); // inflated vs stack-locked|neutral|biased 1758 jccb(Assembler::notZero, IsInflated); 1759 1760 // Attempt stack-locking ... 1761 orptr (tmpReg, markOopDesc::unlocked_value); 1762 movptr(Address(boxReg, 0), tmpReg); // Anticipate successful CAS 1763 if (os::is_MP()) { 1764 lock(); 1765 } 1766 cmpxchgptr(boxReg, Address(objReg, 0)); // Updates tmpReg 1767 if (counters != NULL) { 1768 cond_inc32(Assembler::equal, 1769 ExternalAddress((address)counters->fast_path_entry_count_addr())); 1770 } 1771 jcc(Assembler::equal, DONE_LABEL); // Success 1772 1773 // Recursive locking. 1774 // The object is stack-locked: markword contains stack pointer to BasicLock. 1775 // Locked by current thread if difference with current SP is less than one page. 1776 subptr(tmpReg, rsp); 1777 // Next instruction set ZFlag == 1 (Success) if difference is less then one page. 1778 andptr(tmpReg, (int32_t) (NOT_LP64(0xFFFFF003) LP64_ONLY(7 - os::vm_page_size())) ); 1779 movptr(Address(boxReg, 0), tmpReg); 1780 if (counters != NULL) { 1781 cond_inc32(Assembler::equal, 1782 ExternalAddress((address)counters->fast_path_entry_count_addr())); 1783 } 1784 jmp(DONE_LABEL); 1785 1786 bind(IsInflated); 1787 // The object is inflated. tmpReg contains pointer to ObjectMonitor* + markOopDesc::monitor_value 1788 1789 #if INCLUDE_RTM_OPT 1790 // Use the same RTM locking code in 32- and 64-bit VM. 1791 if (use_rtm) { 1792 rtm_inflated_locking(objReg, boxReg, tmpReg, scrReg, cx1Reg, cx2Reg, 1793 rtm_counters, method_data, profile_rtm, DONE_LABEL); 1794 } else { 1795 #endif // INCLUDE_RTM_OPT 1796 1797 #ifndef _LP64 1798 // The object is inflated. 1799 1800 // boxReg refers to the on-stack BasicLock in the current frame. 1801 // We'd like to write: 1802 // set box->_displaced_header = markOopDesc::unused_mark(). Any non-0 value suffices. 1803 // This is convenient but results a ST-before-CAS penalty. The following CAS suffers 1804 // additional latency as we have another ST in the store buffer that must drain. 1805 1806 if (EmitSync & 8192) { 1807 movptr(Address(boxReg, 0), 3); // results in ST-before-CAS penalty 1808 get_thread (scrReg); 1809 movptr(boxReg, tmpReg); // consider: LEA box, [tmp-2] 1810 movptr(tmpReg, NULL_WORD); // consider: xor vs mov 1811 if (os::is_MP()) { 1812 lock(); 1813 } 1814 cmpxchgptr(scrReg, Address(boxReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 1815 } else 1816 if ((EmitSync & 128) == 0) { // avoid ST-before-CAS 1817 // register juggle because we need tmpReg for cmpxchgptr below 1818 movptr(scrReg, boxReg); 1819 movptr(boxReg, tmpReg); // consider: LEA box, [tmp-2] 1820 1821 // Using a prefetchw helps avoid later RTS->RTO upgrades and cache probes 1822 if ((EmitSync & 2048) && VM_Version::supports_3dnow_prefetch() && os::is_MP()) { 1823 // prefetchw [eax + Offset(_owner)-2] 1824 prefetchw(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 1825 } 1826 1827 if ((EmitSync & 64) == 0) { 1828 // Optimistic form: consider XORL tmpReg,tmpReg 1829 movptr(tmpReg, NULL_WORD); 1830 } else { 1831 // Can suffer RTS->RTO upgrades on shared or cold $ lines 1832 // Test-And-CAS instead of CAS 1833 movptr(tmpReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); // rax, = m->_owner 1834 testptr(tmpReg, tmpReg); // Locked ? 1835 jccb (Assembler::notZero, DONE_LABEL); 1836 } 1837 1838 // Appears unlocked - try to swing _owner from null to non-null. 1839 // Ideally, I'd manifest "Self" with get_thread and then attempt 1840 // to CAS the register containing Self into m->Owner. 1841 // But we don't have enough registers, so instead we can either try to CAS 1842 // rsp or the address of the box (in scr) into &m->owner. If the CAS succeeds 1843 // we later store "Self" into m->Owner. Transiently storing a stack address 1844 // (rsp or the address of the box) into m->owner is harmless. 1845 // Invariant: tmpReg == 0. tmpReg is EAX which is the implicit cmpxchg comparand. 1846 if (os::is_MP()) { 1847 lock(); 1848 } 1849 cmpxchgptr(scrReg, Address(boxReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 1850 movptr(Address(scrReg, 0), 3); // box->_displaced_header = 3 1851 // If we weren't able to swing _owner from NULL to the BasicLock 1852 // then take the slow path. 1853 jccb (Assembler::notZero, DONE_LABEL); 1854 // update _owner from BasicLock to thread 1855 get_thread (scrReg); // beware: clobbers ICCs 1856 movptr(Address(boxReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), scrReg); 1857 xorptr(boxReg, boxReg); // set icc.ZFlag = 1 to indicate success 1858 1859 // If the CAS fails we can either retry or pass control to the slow-path. 1860 // We use the latter tactic. 1861 // Pass the CAS result in the icc.ZFlag into DONE_LABEL 1862 // If the CAS was successful ... 1863 // Self has acquired the lock 1864 // Invariant: m->_recursions should already be 0, so we don't need to explicitly set it. 1865 // Intentional fall-through into DONE_LABEL ... 1866 } else { 1867 movptr(Address(boxReg, 0), intptr_t(markOopDesc::unused_mark())); // results in ST-before-CAS penalty 1868 movptr(boxReg, tmpReg); 1869 1870 // Using a prefetchw helps avoid later RTS->RTO upgrades and cache probes 1871 if ((EmitSync & 2048) && VM_Version::supports_3dnow_prefetch() && os::is_MP()) { 1872 // prefetchw [eax + Offset(_owner)-2] 1873 prefetchw(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 1874 } 1875 1876 if ((EmitSync & 64) == 0) { 1877 // Optimistic form 1878 xorptr (tmpReg, tmpReg); 1879 } else { 1880 // Can suffer RTS->RTO upgrades on shared or cold $ lines 1881 movptr(tmpReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); // rax, = m->_owner 1882 testptr(tmpReg, tmpReg); // Locked ? 1883 jccb (Assembler::notZero, DONE_LABEL); 1884 } 1885 1886 // Appears unlocked - try to swing _owner from null to non-null. 1887 // Use either "Self" (in scr) or rsp as thread identity in _owner. 1888 // Invariant: tmpReg == 0. tmpReg is EAX which is the implicit cmpxchg comparand. 1889 get_thread (scrReg); 1890 if (os::is_MP()) { 1891 lock(); 1892 } 1893 cmpxchgptr(scrReg, Address(boxReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 1894 1895 // If the CAS fails we can either retry or pass control to the slow-path. 1896 // We use the latter tactic. 1897 // Pass the CAS result in the icc.ZFlag into DONE_LABEL 1898 // If the CAS was successful ... 1899 // Self has acquired the lock 1900 // Invariant: m->_recursions should already be 0, so we don't need to explicitly set it. 1901 // Intentional fall-through into DONE_LABEL ... 1902 } 1903 #else // _LP64 1904 // It's inflated 1905 movq(scrReg, tmpReg); 1906 xorq(tmpReg, tmpReg); 1907 1908 if (os::is_MP()) { 1909 lock(); 1910 } 1911 cmpxchgptr(r15_thread, Address(scrReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 1912 // Unconditionally set box->_displaced_header = markOopDesc::unused_mark(). 1913 // Without cast to int32_t movptr will destroy r10 which is typically obj. 1914 movptr(Address(boxReg, 0), (int32_t)intptr_t(markOopDesc::unused_mark())); 1915 // Intentional fall-through into DONE_LABEL ... 1916 // Propagate ICC.ZF from CAS above into DONE_LABEL. 1917 #endif // _LP64 1918 #if INCLUDE_RTM_OPT 1919 } // use_rtm() 1920 #endif 1921 // DONE_LABEL is a hot target - we'd really like to place it at the 1922 // start of cache line by padding with NOPs. 1923 // See the AMD and Intel software optimization manuals for the 1924 // most efficient "long" NOP encodings. 1925 // Unfortunately none of our alignment mechanisms suffice. 1926 bind(DONE_LABEL); 1927 1928 // At DONE_LABEL the icc ZFlag is set as follows ... 1929 // Fast_Unlock uses the same protocol. 1930 // ZFlag == 1 -> Success 1931 // ZFlag == 0 -> Failure - force control through the slow-path 1932 } 1933 } 1934 1935 // obj: object to unlock 1936 // box: box address (displaced header location), killed. Must be EAX. 1937 // tmp: killed, cannot be obj nor box. 1938 // 1939 // Some commentary on balanced locking: 1940 // 1941 // Fast_Lock and Fast_Unlock are emitted only for provably balanced lock sites. 1942 // Methods that don't have provably balanced locking are forced to run in the 1943 // interpreter - such methods won't be compiled to use fast_lock and fast_unlock. 1944 // The interpreter provides two properties: 1945 // I1: At return-time the interpreter automatically and quietly unlocks any 1946 // objects acquired the current activation (frame). Recall that the 1947 // interpreter maintains an on-stack list of locks currently held by 1948 // a frame. 1949 // I2: If a method attempts to unlock an object that is not held by the 1950 // the frame the interpreter throws IMSX. 1951 // 1952 // Lets say A(), which has provably balanced locking, acquires O and then calls B(). 1953 // B() doesn't have provably balanced locking so it runs in the interpreter. 1954 // Control returns to A() and A() unlocks O. By I1 and I2, above, we know that O 1955 // is still locked by A(). 1956 // 1957 // The only other source of unbalanced locking would be JNI. The "Java Native Interface: 1958 // Programmer's Guide and Specification" claims that an object locked by jni_monitorenter 1959 // should not be unlocked by "normal" java-level locking and vice-versa. The specification 1960 // doesn't specify what will occur if a program engages in such mixed-mode locking, however. 1961 // Arguably given that the spec legislates the JNI case as undefined our implementation 1962 // could reasonably *avoid* checking owner in Fast_Unlock(). 1963 // In the interest of performance we elide m->Owner==Self check in unlock. 1964 // A perfectly viable alternative is to elide the owner check except when 1965 // Xcheck:jni is enabled. 1966 1967 void MacroAssembler::fast_unlock(Register objReg, Register boxReg, Register tmpReg, bool use_rtm) { 1968 assert(boxReg == rax, ""); 1969 assert_different_registers(objReg, boxReg, tmpReg); 1970 1971 if (EmitSync & 4) { 1972 // Disable - inhibit all inlining. Force control through the slow-path 1973 cmpptr (rsp, 0); 1974 } else { 1975 Label DONE_LABEL, Stacked, CheckSucc; 1976 1977 // Critically, the biased locking test must have precedence over 1978 // and appear before the (box->dhw == 0) recursive stack-lock test. 1979 if (UseBiasedLocking && !UseOptoBiasInlining) { 1980 biased_locking_exit(objReg, tmpReg, DONE_LABEL); 1981 } 1982 1983 #if INCLUDE_RTM_OPT 1984 if (UseRTMForStackLocks && use_rtm) { 1985 assert(!UseBiasedLocking, "Biased locking is not supported with RTM locking"); 1986 Label L_regular_unlock; 1987 movptr(tmpReg, Address(objReg, 0)); // fetch markword 1988 andptr(tmpReg, markOopDesc::biased_lock_mask_in_place); // look at 3 lock bits 1989 cmpptr(tmpReg, markOopDesc::unlocked_value); // bits = 001 unlocked 1990 jccb(Assembler::notEqual, L_regular_unlock); // if !HLE RegularLock 1991 xend(); // otherwise end... 1992 jmp(DONE_LABEL); // ... and we're done 1993 bind(L_regular_unlock); 1994 } 1995 #endif 1996 1997 cmpptr(Address(boxReg, 0), (int32_t)NULL_WORD); // Examine the displaced header 1998 jcc (Assembler::zero, DONE_LABEL); // 0 indicates recursive stack-lock 1999 movptr(tmpReg, Address(objReg, 0)); // Examine the object's markword 2000 testptr(tmpReg, markOopDesc::monitor_value); // Inflated? 2001 jccb (Assembler::zero, Stacked); 2002 2003 // It's inflated. 2004 #if INCLUDE_RTM_OPT 2005 if (use_rtm) { 2006 Label L_regular_inflated_unlock; 2007 int owner_offset = OM_OFFSET_NO_MONITOR_VALUE_TAG(owner); 2008 movptr(boxReg, Address(tmpReg, owner_offset)); 2009 testptr(boxReg, boxReg); 2010 jccb(Assembler::notZero, L_regular_inflated_unlock); 2011 xend(); 2012 jmpb(DONE_LABEL); 2013 bind(L_regular_inflated_unlock); 2014 } 2015 #endif 2016 2017 // Despite our balanced locking property we still check that m->_owner == Self 2018 // as java routines or native JNI code called by this thread might 2019 // have released the lock. 2020 // Refer to the comments in synchronizer.cpp for how we might encode extra 2021 // state in _succ so we can avoid fetching EntryList|cxq. 2022 // 2023 // I'd like to add more cases in fast_lock() and fast_unlock() -- 2024 // such as recursive enter and exit -- but we have to be wary of 2025 // I$ bloat, T$ effects and BP$ effects. 2026 // 2027 // If there's no contention try a 1-0 exit. That is, exit without 2028 // a costly MEMBAR or CAS. See synchronizer.cpp for details on how 2029 // we detect and recover from the race that the 1-0 exit admits. 2030 // 2031 // Conceptually Fast_Unlock() must execute a STST|LDST "release" barrier 2032 // before it STs null into _owner, releasing the lock. Updates 2033 // to data protected by the critical section must be visible before 2034 // we drop the lock (and thus before any other thread could acquire 2035 // the lock and observe the fields protected by the lock). 2036 // IA32's memory-model is SPO, so STs are ordered with respect to 2037 // each other and there's no need for an explicit barrier (fence). 2038 // See also http://gee.cs.oswego.edu/dl/jmm/cookbook.html. 2039 #ifndef _LP64 2040 get_thread (boxReg); 2041 if ((EmitSync & 4096) && VM_Version::supports_3dnow_prefetch() && os::is_MP()) { 2042 // prefetchw [ebx + Offset(_owner)-2] 2043 prefetchw(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 2044 } 2045 2046 // Note that we could employ various encoding schemes to reduce 2047 // the number of loads below (currently 4) to just 2 or 3. 2048 // Refer to the comments in synchronizer.cpp. 2049 // In practice the chain of fetches doesn't seem to impact performance, however. 2050 xorptr(boxReg, boxReg); 2051 if ((EmitSync & 65536) == 0 && (EmitSync & 256)) { 2052 // Attempt to reduce branch density - AMD's branch predictor. 2053 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(recursions))); 2054 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(EntryList))); 2055 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(cxq))); 2056 jccb (Assembler::notZero, DONE_LABEL); 2057 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), NULL_WORD); 2058 jmpb (DONE_LABEL); 2059 } else { 2060 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(recursions))); 2061 jccb (Assembler::notZero, DONE_LABEL); 2062 movptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(EntryList))); 2063 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(cxq))); 2064 jccb (Assembler::notZero, CheckSucc); 2065 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), NULL_WORD); 2066 jmpb (DONE_LABEL); 2067 } 2068 2069 // The Following code fragment (EmitSync & 65536) improves the performance of 2070 // contended applications and contended synchronization microbenchmarks. 2071 // Unfortunately the emission of the code - even though not executed - causes regressions 2072 // in scimark and jetstream, evidently because of $ effects. Replacing the code 2073 // with an equal number of never-executed NOPs results in the same regression. 2074 // We leave it off by default. 2075 2076 if ((EmitSync & 65536) != 0) { 2077 Label LSuccess, LGoSlowPath ; 2078 2079 bind (CheckSucc); 2080 2081 // Optional pre-test ... it's safe to elide this 2082 cmpptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(succ)), (int32_t)NULL_WORD); 2083 jccb(Assembler::zero, LGoSlowPath); 2084 2085 // We have a classic Dekker-style idiom: 2086 // ST m->_owner = 0 ; MEMBAR; LD m->_succ 2087 // There are a number of ways to implement the barrier: 2088 // (1) lock:andl &m->_owner, 0 2089 // is fast, but mask doesn't currently support the "ANDL M,IMM32" form. 2090 // LOCK: ANDL [ebx+Offset(_Owner)-2], 0 2091 // Encodes as 81 31 OFF32 IMM32 or 83 63 OFF8 IMM8 2092 // (2) If supported, an explicit MFENCE is appealing. 2093 // In older IA32 processors MFENCE is slower than lock:add or xchg 2094 // particularly if the write-buffer is full as might be the case if 2095 // if stores closely precede the fence or fence-equivalent instruction. 2096 // See https://blogs.oracle.com/dave/entry/instruction_selection_for_volatile_fences 2097 // as the situation has changed with Nehalem and Shanghai. 2098 // (3) In lieu of an explicit fence, use lock:addl to the top-of-stack 2099 // The $lines underlying the top-of-stack should be in M-state. 2100 // The locked add instruction is serializing, of course. 2101 // (4) Use xchg, which is serializing 2102 // mov boxReg, 0; xchgl boxReg, [tmpReg + Offset(_owner)-2] also works 2103 // (5) ST m->_owner = 0 and then execute lock:orl &m->_succ, 0. 2104 // The integer condition codes will tell us if succ was 0. 2105 // Since _succ and _owner should reside in the same $line and 2106 // we just stored into _owner, it's likely that the $line 2107 // remains in M-state for the lock:orl. 2108 // 2109 // We currently use (3), although it's likely that switching to (2) 2110 // is correct for the future. 2111 2112 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), NULL_WORD); 2113 if (os::is_MP()) { 2114 lock(); addptr(Address(rsp, 0), 0); 2115 } 2116 // Ratify _succ remains non-null 2117 cmpptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(succ)), 0); 2118 jccb (Assembler::notZero, LSuccess); 2119 2120 xorptr(boxReg, boxReg); // box is really EAX 2121 if (os::is_MP()) { lock(); } 2122 cmpxchgptr(rsp, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 2123 // There's no successor so we tried to regrab the lock with the 2124 // placeholder value. If that didn't work, then another thread 2125 // grabbed the lock so we're done (and exit was a success). 2126 jccb (Assembler::notEqual, LSuccess); 2127 // Since we're low on registers we installed rsp as a placeholding in _owner. 2128 // Now install Self over rsp. This is safe as we're transitioning from 2129 // non-null to non=null 2130 get_thread (boxReg); 2131 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), boxReg); 2132 // Intentional fall-through into LGoSlowPath ... 2133 2134 bind (LGoSlowPath); 2135 orptr(boxReg, 1); // set ICC.ZF=0 to indicate failure 2136 jmpb (DONE_LABEL); 2137 2138 bind (LSuccess); 2139 xorptr(boxReg, boxReg); // set ICC.ZF=1 to indicate success 2140 jmpb (DONE_LABEL); 2141 } 2142 2143 bind (Stacked); 2144 // It's not inflated and it's not recursively stack-locked and it's not biased. 2145 // It must be stack-locked. 2146 // Try to reset the header to displaced header. 2147 // The "box" value on the stack is stable, so we can reload 2148 // and be assured we observe the same value as above. 2149 movptr(tmpReg, Address(boxReg, 0)); 2150 if (os::is_MP()) { 2151 lock(); 2152 } 2153 cmpxchgptr(tmpReg, Address(objReg, 0)); // Uses RAX which is box 2154 // Intention fall-thru into DONE_LABEL 2155 2156 // DONE_LABEL is a hot target - we'd really like to place it at the 2157 // start of cache line by padding with NOPs. 2158 // See the AMD and Intel software optimization manuals for the 2159 // most efficient "long" NOP encodings. 2160 // Unfortunately none of our alignment mechanisms suffice. 2161 if ((EmitSync & 65536) == 0) { 2162 bind (CheckSucc); 2163 } 2164 #else // _LP64 2165 // It's inflated 2166 if (EmitSync & 1024) { 2167 // Emit code to check that _owner == Self 2168 // We could fold the _owner test into subsequent code more efficiently 2169 // than using a stand-alone check, but since _owner checking is off by 2170 // default we don't bother. We also might consider predicating the 2171 // _owner==Self check on Xcheck:jni or running on a debug build. 2172 movptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 2173 xorptr(boxReg, r15_thread); 2174 } else { 2175 xorptr(boxReg, boxReg); 2176 } 2177 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(recursions))); 2178 jccb (Assembler::notZero, DONE_LABEL); 2179 movptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(cxq))); 2180 orptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(EntryList))); 2181 jccb (Assembler::notZero, CheckSucc); 2182 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), (int32_t)NULL_WORD); 2183 jmpb (DONE_LABEL); 2184 2185 if ((EmitSync & 65536) == 0) { 2186 // Try to avoid passing control into the slow_path ... 2187 Label LSuccess, LGoSlowPath ; 2188 bind (CheckSucc); 2189 2190 // The following optional optimization can be elided if necessary 2191 // Effectively: if (succ == null) goto SlowPath 2192 // The code reduces the window for a race, however, 2193 // and thus benefits performance. 2194 cmpptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(succ)), (int32_t)NULL_WORD); 2195 jccb (Assembler::zero, LGoSlowPath); 2196 2197 if ((EmitSync & 16) && os::is_MP()) { 2198 orptr(boxReg, boxReg); 2199 xchgptr(boxReg, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 2200 } else { 2201 movptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner)), (int32_t)NULL_WORD); 2202 if (os::is_MP()) { 2203 // Memory barrier/fence 2204 // Dekker pivot point -- fulcrum : ST Owner; MEMBAR; LD Succ 2205 // Instead of MFENCE we use a dummy locked add of 0 to the top-of-stack. 2206 // This is faster on Nehalem and AMD Shanghai/Barcelona. 2207 // See https://blogs.oracle.com/dave/entry/instruction_selection_for_volatile_fences 2208 // We might also restructure (ST Owner=0;barrier;LD _Succ) to 2209 // (mov box,0; xchgq box, &m->Owner; LD _succ) . 2210 lock(); addl(Address(rsp, 0), 0); 2211 } 2212 } 2213 cmpptr(Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(succ)), (int32_t)NULL_WORD); 2214 jccb (Assembler::notZero, LSuccess); 2215 2216 // Rare inopportune interleaving - race. 2217 // The successor vanished in the small window above. 2218 // The lock is contended -- (cxq|EntryList) != null -- and there's no apparent successor. 2219 // We need to ensure progress and succession. 2220 // Try to reacquire the lock. 2221 // If that fails then the new owner is responsible for succession and this 2222 // thread needs to take no further action and can exit via the fast path (success). 2223 // If the re-acquire succeeds then pass control into the slow path. 2224 // As implemented, this latter mode is horrible because we generated more 2225 // coherence traffic on the lock *and* artifically extended the critical section 2226 // length while by virtue of passing control into the slow path. 2227 2228 // box is really RAX -- the following CMPXCHG depends on that binding 2229 // cmpxchg R,[M] is equivalent to rax = CAS(M,rax,R) 2230 movptr(boxReg, (int32_t)NULL_WORD); 2231 if (os::is_MP()) { lock(); } 2232 cmpxchgptr(r15_thread, Address(tmpReg, OM_OFFSET_NO_MONITOR_VALUE_TAG(owner))); 2233 // There's no successor so we tried to regrab the lock. 2234 // If that didn't work, then another thread grabbed the 2235 // lock so we're done (and exit was a success). 2236 jccb (Assembler::notEqual, LSuccess); 2237 // Intentional fall-through into slow-path 2238 2239 bind (LGoSlowPath); 2240 orl (boxReg, 1); // set ICC.ZF=0 to indicate failure 2241 jmpb (DONE_LABEL); 2242 2243 bind (LSuccess); 2244 testl (boxReg, 0); // set ICC.ZF=1 to indicate success 2245 jmpb (DONE_LABEL); 2246 } 2247 2248 bind (Stacked); 2249 movptr(tmpReg, Address (boxReg, 0)); // re-fetch 2250 if (os::is_MP()) { lock(); } 2251 cmpxchgptr(tmpReg, Address(objReg, 0)); // Uses RAX which is box 2252 2253 if (EmitSync & 65536) { 2254 bind (CheckSucc); 2255 } 2256 #endif 2257 bind(DONE_LABEL); 2258 } 2259 } 2260 #endif // COMPILER2 2261 2262 void MacroAssembler::c2bool(Register x) { 2263 // implements x == 0 ? 0 : 1 2264 // note: must only look at least-significant byte of x 2265 // since C-style booleans are stored in one byte 2266 // only! (was bug) 2267 andl(x, 0xFF); 2268 setb(Assembler::notZero, x); 2269 } 2270 2271 // Wouldn't need if AddressLiteral version had new name 2272 void MacroAssembler::call(Label& L, relocInfo::relocType rtype) { 2273 Assembler::call(L, rtype); 2274 } 2275 2276 void MacroAssembler::call(Register entry) { 2277 Assembler::call(entry); 2278 } 2279 2280 void MacroAssembler::call(AddressLiteral entry) { 2281 if (reachable(entry)) { 2282 Assembler::call_literal(entry.target(), entry.rspec()); 2283 } else { 2284 lea(rscratch1, entry); 2285 Assembler::call(rscratch1); 2286 } 2287 } 2288 2289 void MacroAssembler::ic_call(address entry, jint method_index) { 2290 RelocationHolder rh = virtual_call_Relocation::spec(pc(), method_index); 2291 movptr(rax, (intptr_t)Universe::non_oop_word()); 2292 call(AddressLiteral(entry, rh)); 2293 } 2294 2295 // Implementation of call_VM versions 2296 2297 void MacroAssembler::call_VM(Register oop_result, 2298 address entry_point, 2299 bool check_exceptions) { 2300 Label C, E; 2301 call(C, relocInfo::none); 2302 jmp(E); 2303 2304 bind(C); 2305 call_VM_helper(oop_result, entry_point, 0, check_exceptions); 2306 ret(0); 2307 2308 bind(E); 2309 } 2310 2311 void MacroAssembler::call_VM(Register oop_result, 2312 address entry_point, 2313 Register arg_1, 2314 bool check_exceptions) { 2315 Label C, E; 2316 call(C, relocInfo::none); 2317 jmp(E); 2318 2319 bind(C); 2320 pass_arg1(this, arg_1); 2321 call_VM_helper(oop_result, entry_point, 1, check_exceptions); 2322 ret(0); 2323 2324 bind(E); 2325 } 2326 2327 void MacroAssembler::call_VM(Register oop_result, 2328 address entry_point, 2329 Register arg_1, 2330 Register arg_2, 2331 bool check_exceptions) { 2332 Label C, E; 2333 call(C, relocInfo::none); 2334 jmp(E); 2335 2336 bind(C); 2337 2338 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 2339 2340 pass_arg2(this, arg_2); 2341 pass_arg1(this, arg_1); 2342 call_VM_helper(oop_result, entry_point, 2, check_exceptions); 2343 ret(0); 2344 2345 bind(E); 2346 } 2347 2348 void MacroAssembler::call_VM(Register oop_result, 2349 address entry_point, 2350 Register arg_1, 2351 Register arg_2, 2352 Register arg_3, 2353 bool check_exceptions) { 2354 Label C, E; 2355 call(C, relocInfo::none); 2356 jmp(E); 2357 2358 bind(C); 2359 2360 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); 2361 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); 2362 pass_arg3(this, arg_3); 2363 2364 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 2365 pass_arg2(this, arg_2); 2366 2367 pass_arg1(this, arg_1); 2368 call_VM_helper(oop_result, entry_point, 3, check_exceptions); 2369 ret(0); 2370 2371 bind(E); 2372 } 2373 2374 void MacroAssembler::call_VM(Register oop_result, 2375 Register last_java_sp, 2376 address entry_point, 2377 int number_of_arguments, 2378 bool check_exceptions) { 2379 Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg); 2380 call_VM_base(oop_result, thread, last_java_sp, entry_point, number_of_arguments, check_exceptions); 2381 } 2382 2383 void MacroAssembler::call_VM(Register oop_result, 2384 Register last_java_sp, 2385 address entry_point, 2386 Register arg_1, 2387 bool check_exceptions) { 2388 pass_arg1(this, arg_1); 2389 call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions); 2390 } 2391 2392 void MacroAssembler::call_VM(Register oop_result, 2393 Register last_java_sp, 2394 address entry_point, 2395 Register arg_1, 2396 Register arg_2, 2397 bool check_exceptions) { 2398 2399 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 2400 pass_arg2(this, arg_2); 2401 pass_arg1(this, arg_1); 2402 call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions); 2403 } 2404 2405 void MacroAssembler::call_VM(Register oop_result, 2406 Register last_java_sp, 2407 address entry_point, 2408 Register arg_1, 2409 Register arg_2, 2410 Register arg_3, 2411 bool check_exceptions) { 2412 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); 2413 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); 2414 pass_arg3(this, arg_3); 2415 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 2416 pass_arg2(this, arg_2); 2417 pass_arg1(this, arg_1); 2418 call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions); 2419 } 2420 2421 void MacroAssembler::super_call_VM(Register oop_result, 2422 Register last_java_sp, 2423 address entry_point, 2424 int number_of_arguments, 2425 bool check_exceptions) { 2426 Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg); 2427 MacroAssembler::call_VM_base(oop_result, thread, last_java_sp, entry_point, number_of_arguments, check_exceptions); 2428 } 2429 2430 void MacroAssembler::super_call_VM(Register oop_result, 2431 Register last_java_sp, 2432 address entry_point, 2433 Register arg_1, 2434 bool check_exceptions) { 2435 pass_arg1(this, arg_1); 2436 super_call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions); 2437 } 2438 2439 void MacroAssembler::super_call_VM(Register oop_result, 2440 Register last_java_sp, 2441 address entry_point, 2442 Register arg_1, 2443 Register arg_2, 2444 bool check_exceptions) { 2445 2446 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 2447 pass_arg2(this, arg_2); 2448 pass_arg1(this, arg_1); 2449 super_call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions); 2450 } 2451 2452 void MacroAssembler::super_call_VM(Register oop_result, 2453 Register last_java_sp, 2454 address entry_point, 2455 Register arg_1, 2456 Register arg_2, 2457 Register arg_3, 2458 bool check_exceptions) { 2459 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); 2460 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); 2461 pass_arg3(this, arg_3); 2462 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 2463 pass_arg2(this, arg_2); 2464 pass_arg1(this, arg_1); 2465 super_call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions); 2466 } 2467 2468 void MacroAssembler::call_VM_base(Register oop_result, 2469 Register java_thread, 2470 Register last_java_sp, 2471 address entry_point, 2472 int number_of_arguments, 2473 bool check_exceptions) { 2474 // determine java_thread register 2475 if (!java_thread->is_valid()) { 2476 #ifdef _LP64 2477 java_thread = r15_thread; 2478 #else 2479 java_thread = rdi; 2480 get_thread(java_thread); 2481 #endif // LP64 2482 } 2483 // determine last_java_sp register 2484 if (!last_java_sp->is_valid()) { 2485 last_java_sp = rsp; 2486 } 2487 // debugging support 2488 assert(number_of_arguments >= 0 , "cannot have negative number of arguments"); 2489 LP64_ONLY(assert(java_thread == r15_thread, "unexpected register")); 2490 #ifdef ASSERT 2491 // TraceBytecodes does not use r12 but saves it over the call, so don't verify 2492 // r12 is the heapbase. 2493 LP64_ONLY(if ((UseCompressedOops || UseCompressedClassPointers) && !TraceBytecodes) verify_heapbase("call_VM_base: heap base corrupted?");) 2494 #endif // ASSERT 2495 2496 assert(java_thread != oop_result , "cannot use the same register for java_thread & oop_result"); 2497 assert(java_thread != last_java_sp, "cannot use the same register for java_thread & last_java_sp"); 2498 2499 // push java thread (becomes first argument of C function) 2500 2501 NOT_LP64(push(java_thread); number_of_arguments++); 2502 LP64_ONLY(mov(c_rarg0, r15_thread)); 2503 2504 // set last Java frame before call 2505 assert(last_java_sp != rbp, "can't use ebp/rbp"); 2506 2507 // Only interpreter should have to set fp 2508 set_last_Java_frame(java_thread, last_java_sp, rbp, NULL); 2509 2510 // do the call, remove parameters 2511 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments); 2512 2513 // restore the thread (cannot use the pushed argument since arguments 2514 // may be overwritten by C code generated by an optimizing compiler); 2515 // however can use the register value directly if it is callee saved. 2516 if (LP64_ONLY(true ||) java_thread == rdi || java_thread == rsi) { 2517 // rdi & rsi (also r15) are callee saved -> nothing to do 2518 #ifdef ASSERT 2519 guarantee(java_thread != rax, "change this code"); 2520 push(rax); 2521 { Label L; 2522 get_thread(rax); 2523 cmpptr(java_thread, rax); 2524 jcc(Assembler::equal, L); 2525 STOP("MacroAssembler::call_VM_base: rdi not callee saved?"); 2526 bind(L); 2527 } 2528 pop(rax); 2529 #endif 2530 } else { 2531 get_thread(java_thread); 2532 } 2533 // reset last Java frame 2534 // Only interpreter should have to clear fp 2535 reset_last_Java_frame(java_thread, true, false); 2536 2537 #ifndef CC_INTERP 2538 // C++ interp handles this in the interpreter 2539 check_and_handle_popframe(java_thread); 2540 check_and_handle_earlyret(java_thread); 2541 #endif /* CC_INTERP */ 2542 2543 if (check_exceptions) { 2544 // check for pending exceptions (java_thread is set upon return) 2545 cmpptr(Address(java_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD); 2546 #ifndef _LP64 2547 jump_cc(Assembler::notEqual, 2548 RuntimeAddress(StubRoutines::forward_exception_entry())); 2549 #else 2550 // This used to conditionally jump to forward_exception however it is 2551 // possible if we relocate that the branch will not reach. So we must jump 2552 // around so we can always reach 2553 2554 Label ok; 2555 jcc(Assembler::equal, ok); 2556 jump(RuntimeAddress(StubRoutines::forward_exception_entry())); 2557 bind(ok); 2558 #endif // LP64 2559 } 2560 2561 // get oop result if there is one and reset the value in the thread 2562 if (oop_result->is_valid()) { 2563 get_vm_result(oop_result, java_thread); 2564 } 2565 } 2566 2567 void MacroAssembler::call_VM_helper(Register oop_result, address entry_point, int number_of_arguments, bool check_exceptions) { 2568 2569 // Calculate the value for last_Java_sp 2570 // somewhat subtle. call_VM does an intermediate call 2571 // which places a return address on the stack just under the 2572 // stack pointer as the user finsihed with it. This allows 2573 // use to retrieve last_Java_pc from last_Java_sp[-1]. 2574 // On 32bit we then have to push additional args on the stack to accomplish 2575 // the actual requested call. On 64bit call_VM only can use register args 2576 // so the only extra space is the return address that call_VM created. 2577 // This hopefully explains the calculations here. 2578 2579 #ifdef _LP64 2580 // We've pushed one address, correct last_Java_sp 2581 lea(rax, Address(rsp, wordSize)); 2582 #else 2583 lea(rax, Address(rsp, (1 + number_of_arguments) * wordSize)); 2584 #endif // LP64 2585 2586 call_VM_base(oop_result, noreg, rax, entry_point, number_of_arguments, check_exceptions); 2587 2588 } 2589 2590 void MacroAssembler::call_VM_leaf(address entry_point, int number_of_arguments) { 2591 call_VM_leaf_base(entry_point, number_of_arguments); 2592 } 2593 2594 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0) { 2595 pass_arg0(this, arg_0); 2596 call_VM_leaf(entry_point, 1); 2597 } 2598 2599 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1) { 2600 2601 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); 2602 pass_arg1(this, arg_1); 2603 pass_arg0(this, arg_0); 2604 call_VM_leaf(entry_point, 2); 2605 } 2606 2607 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) { 2608 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg")); 2609 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 2610 pass_arg2(this, arg_2); 2611 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); 2612 pass_arg1(this, arg_1); 2613 pass_arg0(this, arg_0); 2614 call_VM_leaf(entry_point, 3); 2615 } 2616 2617 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0) { 2618 pass_arg0(this, arg_0); 2619 MacroAssembler::call_VM_leaf_base(entry_point, 1); 2620 } 2621 2622 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1) { 2623 2624 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); 2625 pass_arg1(this, arg_1); 2626 pass_arg0(this, arg_0); 2627 MacroAssembler::call_VM_leaf_base(entry_point, 2); 2628 } 2629 2630 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) { 2631 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg")); 2632 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); 2633 pass_arg2(this, arg_2); 2634 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); 2635 pass_arg1(this, arg_1); 2636 pass_arg0(this, arg_0); 2637 MacroAssembler::call_VM_leaf_base(entry_point, 3); 2638 } 2639 2640 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2, Register arg_3) { 2641 LP64_ONLY(assert(arg_0 != c_rarg3, "smashed arg")); 2642 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); 2643 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); 2644 pass_arg3(this, arg_3); 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, 4); 2652 } 2653 2654 void MacroAssembler::get_vm_result(Register oop_result, Register java_thread) { 2655 movptr(oop_result, Address(java_thread, JavaThread::vm_result_offset())); 2656 movptr(Address(java_thread, JavaThread::vm_result_offset()), NULL_WORD); 2657 verify_oop(oop_result, "broken oop in call_VM_base"); 2658 } 2659 2660 void MacroAssembler::get_vm_result_2(Register metadata_result, Register java_thread) { 2661 movptr(metadata_result, Address(java_thread, JavaThread::vm_result_2_offset())); 2662 movptr(Address(java_thread, JavaThread::vm_result_2_offset()), NULL_WORD); 2663 } 2664 2665 void MacroAssembler::check_and_handle_earlyret(Register java_thread) { 2666 } 2667 2668 void MacroAssembler::check_and_handle_popframe(Register java_thread) { 2669 } 2670 2671 void MacroAssembler::cmp32(AddressLiteral src1, int32_t imm) { 2672 if (reachable(src1)) { 2673 cmpl(as_Address(src1), imm); 2674 } else { 2675 lea(rscratch1, src1); 2676 cmpl(Address(rscratch1, 0), imm); 2677 } 2678 } 2679 2680 void MacroAssembler::cmp32(Register src1, AddressLiteral src2) { 2681 assert(!src2.is_lval(), "use cmpptr"); 2682 if (reachable(src2)) { 2683 cmpl(src1, as_Address(src2)); 2684 } else { 2685 lea(rscratch1, src2); 2686 cmpl(src1, Address(rscratch1, 0)); 2687 } 2688 } 2689 2690 void MacroAssembler::cmp32(Register src1, int32_t imm) { 2691 Assembler::cmpl(src1, imm); 2692 } 2693 2694 void MacroAssembler::cmp32(Register src1, Address src2) { 2695 Assembler::cmpl(src1, src2); 2696 } 2697 2698 void MacroAssembler::cmpsd2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) { 2699 ucomisd(opr1, opr2); 2700 2701 Label L; 2702 if (unordered_is_less) { 2703 movl(dst, -1); 2704 jcc(Assembler::parity, L); 2705 jcc(Assembler::below , L); 2706 movl(dst, 0); 2707 jcc(Assembler::equal , L); 2708 increment(dst); 2709 } else { // unordered is greater 2710 movl(dst, 1); 2711 jcc(Assembler::parity, L); 2712 jcc(Assembler::above , L); 2713 movl(dst, 0); 2714 jcc(Assembler::equal , L); 2715 decrementl(dst); 2716 } 2717 bind(L); 2718 } 2719 2720 void MacroAssembler::cmpss2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) { 2721 ucomiss(opr1, opr2); 2722 2723 Label L; 2724 if (unordered_is_less) { 2725 movl(dst, -1); 2726 jcc(Assembler::parity, L); 2727 jcc(Assembler::below , L); 2728 movl(dst, 0); 2729 jcc(Assembler::equal , L); 2730 increment(dst); 2731 } else { // unordered is greater 2732 movl(dst, 1); 2733 jcc(Assembler::parity, L); 2734 jcc(Assembler::above , L); 2735 movl(dst, 0); 2736 jcc(Assembler::equal , L); 2737 decrementl(dst); 2738 } 2739 bind(L); 2740 } 2741 2742 2743 void MacroAssembler::cmp8(AddressLiteral src1, int imm) { 2744 if (reachable(src1)) { 2745 cmpb(as_Address(src1), imm); 2746 } else { 2747 lea(rscratch1, src1); 2748 cmpb(Address(rscratch1, 0), imm); 2749 } 2750 } 2751 2752 void MacroAssembler::cmpptr(Register src1, AddressLiteral src2) { 2753 #ifdef _LP64 2754 if (src2.is_lval()) { 2755 movptr(rscratch1, src2); 2756 Assembler::cmpq(src1, rscratch1); 2757 } else if (reachable(src2)) { 2758 cmpq(src1, as_Address(src2)); 2759 } else { 2760 lea(rscratch1, src2); 2761 Assembler::cmpq(src1, Address(rscratch1, 0)); 2762 } 2763 #else 2764 if (src2.is_lval()) { 2765 cmp_literal32(src1, (int32_t) src2.target(), src2.rspec()); 2766 } else { 2767 cmpl(src1, as_Address(src2)); 2768 } 2769 #endif // _LP64 2770 } 2771 2772 void MacroAssembler::cmpptr(Address src1, AddressLiteral src2) { 2773 assert(src2.is_lval(), "not a mem-mem compare"); 2774 #ifdef _LP64 2775 // moves src2's literal address 2776 movptr(rscratch1, src2); 2777 Assembler::cmpq(src1, rscratch1); 2778 #else 2779 cmp_literal32(src1, (int32_t) src2.target(), src2.rspec()); 2780 #endif // _LP64 2781 } 2782 2783 void MacroAssembler::locked_cmpxchgptr(Register reg, AddressLiteral adr) { 2784 if (reachable(adr)) { 2785 if (os::is_MP()) 2786 lock(); 2787 cmpxchgptr(reg, as_Address(adr)); 2788 } else { 2789 lea(rscratch1, adr); 2790 if (os::is_MP()) 2791 lock(); 2792 cmpxchgptr(reg, Address(rscratch1, 0)); 2793 } 2794 } 2795 2796 void MacroAssembler::cmpxchgptr(Register reg, Address adr) { 2797 LP64_ONLY(cmpxchgq(reg, adr)) NOT_LP64(cmpxchgl(reg, adr)); 2798 } 2799 2800 void MacroAssembler::comisd(XMMRegister dst, AddressLiteral src) { 2801 if (reachable(src)) { 2802 Assembler::comisd(dst, as_Address(src)); 2803 } else { 2804 lea(rscratch1, src); 2805 Assembler::comisd(dst, Address(rscratch1, 0)); 2806 } 2807 } 2808 2809 void MacroAssembler::comiss(XMMRegister dst, AddressLiteral src) { 2810 if (reachable(src)) { 2811 Assembler::comiss(dst, as_Address(src)); 2812 } else { 2813 lea(rscratch1, src); 2814 Assembler::comiss(dst, Address(rscratch1, 0)); 2815 } 2816 } 2817 2818 2819 void MacroAssembler::cond_inc32(Condition cond, AddressLiteral counter_addr) { 2820 Condition negated_cond = negate_condition(cond); 2821 Label L; 2822 jcc(negated_cond, L); 2823 pushf(); // Preserve flags 2824 atomic_incl(counter_addr); 2825 popf(); 2826 bind(L); 2827 } 2828 2829 int MacroAssembler::corrected_idivl(Register reg) { 2830 // Full implementation of Java idiv and irem; checks for 2831 // special case as described in JVM spec., p.243 & p.271. 2832 // The function returns the (pc) offset of the idivl 2833 // instruction - may be needed for implicit exceptions. 2834 // 2835 // normal case special case 2836 // 2837 // input : rax,: dividend min_int 2838 // reg: divisor (may not be rax,/rdx) -1 2839 // 2840 // output: rax,: quotient (= rax, idiv reg) min_int 2841 // rdx: remainder (= rax, irem reg) 0 2842 assert(reg != rax && reg != rdx, "reg cannot be rax, or rdx register"); 2843 const int min_int = 0x80000000; 2844 Label normal_case, special_case; 2845 2846 // check for special case 2847 cmpl(rax, min_int); 2848 jcc(Assembler::notEqual, normal_case); 2849 xorl(rdx, rdx); // prepare rdx for possible special case (where remainder = 0) 2850 cmpl(reg, -1); 2851 jcc(Assembler::equal, special_case); 2852 2853 // handle normal case 2854 bind(normal_case); 2855 cdql(); 2856 int idivl_offset = offset(); 2857 idivl(reg); 2858 2859 // normal and special case exit 2860 bind(special_case); 2861 2862 return idivl_offset; 2863 } 2864 2865 2866 2867 void MacroAssembler::decrementl(Register reg, int value) { 2868 if (value == min_jint) {subl(reg, value) ; return; } 2869 if (value < 0) { incrementl(reg, -value); return; } 2870 if (value == 0) { ; return; } 2871 if (value == 1 && UseIncDec) { decl(reg) ; return; } 2872 /* else */ { subl(reg, value) ; return; } 2873 } 2874 2875 void MacroAssembler::decrementl(Address dst, int value) { 2876 if (value == min_jint) {subl(dst, value) ; return; } 2877 if (value < 0) { incrementl(dst, -value); return; } 2878 if (value == 0) { ; return; } 2879 if (value == 1 && UseIncDec) { decl(dst) ; return; } 2880 /* else */ { subl(dst, value) ; return; } 2881 } 2882 2883 void MacroAssembler::division_with_shift (Register reg, int shift_value) { 2884 assert (shift_value > 0, "illegal shift value"); 2885 Label _is_positive; 2886 testl (reg, reg); 2887 jcc (Assembler::positive, _is_positive); 2888 int offset = (1 << shift_value) - 1 ; 2889 2890 if (offset == 1) { 2891 incrementl(reg); 2892 } else { 2893 addl(reg, offset); 2894 } 2895 2896 bind (_is_positive); 2897 sarl(reg, shift_value); 2898 } 2899 2900 void MacroAssembler::divsd(XMMRegister dst, AddressLiteral src) { 2901 if (reachable(src)) { 2902 Assembler::divsd(dst, as_Address(src)); 2903 } else { 2904 lea(rscratch1, src); 2905 Assembler::divsd(dst, Address(rscratch1, 0)); 2906 } 2907 } 2908 2909 void MacroAssembler::divss(XMMRegister dst, AddressLiteral src) { 2910 if (reachable(src)) { 2911 Assembler::divss(dst, as_Address(src)); 2912 } else { 2913 lea(rscratch1, src); 2914 Assembler::divss(dst, Address(rscratch1, 0)); 2915 } 2916 } 2917 2918 // !defined(COMPILER2) is because of stupid core builds 2919 #if !defined(_LP64) || defined(COMPILER1) || !defined(COMPILER2) || INCLUDE_JVMCI 2920 void MacroAssembler::empty_FPU_stack() { 2921 if (VM_Version::supports_mmx()) { 2922 emms(); 2923 } else { 2924 for (int i = 8; i-- > 0; ) ffree(i); 2925 } 2926 } 2927 #endif // !LP64 || C1 || !C2 || INCLUDE_JVMCI 2928 2929 2930 // Defines obj, preserves var_size_in_bytes 2931 void MacroAssembler::eden_allocate(Register obj, 2932 Register var_size_in_bytes, 2933 int con_size_in_bytes, 2934 Register t1, 2935 Label& slow_case) { 2936 assert(obj == rax, "obj must be in rax, for cmpxchg"); 2937 assert_different_registers(obj, var_size_in_bytes, t1); 2938 if (!Universe::heap()->supports_inline_contig_alloc()) { 2939 jmp(slow_case); 2940 } else { 2941 Register end = t1; 2942 Label retry; 2943 bind(retry); 2944 ExternalAddress heap_top((address) Universe::heap()->top_addr()); 2945 movptr(obj, heap_top); 2946 if (var_size_in_bytes == noreg) { 2947 lea(end, Address(obj, con_size_in_bytes)); 2948 } else { 2949 lea(end, Address(obj, var_size_in_bytes, Address::times_1)); 2950 } 2951 // if end < obj then we wrapped around => object too long => slow case 2952 cmpptr(end, obj); 2953 jcc(Assembler::below, slow_case); 2954 cmpptr(end, ExternalAddress((address) Universe::heap()->end_addr())); 2955 jcc(Assembler::above, slow_case); 2956 // Compare obj with the top addr, and if still equal, store the new top addr in 2957 // end at the address of the top addr pointer. Sets ZF if was equal, and clears 2958 // it otherwise. Use lock prefix for atomicity on MPs. 2959 locked_cmpxchgptr(end, heap_top); 2960 jcc(Assembler::notEqual, retry); 2961 } 2962 } 2963 2964 void MacroAssembler::enter() { 2965 push(rbp); 2966 mov(rbp, rsp); 2967 } 2968 2969 // A 5 byte nop that is safe for patching (see patch_verified_entry) 2970 void MacroAssembler::fat_nop() { 2971 if (UseAddressNop) { 2972 addr_nop_5(); 2973 } else { 2974 emit_int8(0x26); // es: 2975 emit_int8(0x2e); // cs: 2976 emit_int8(0x64); // fs: 2977 emit_int8(0x65); // gs: 2978 emit_int8((unsigned char)0x90); 2979 } 2980 } 2981 2982 void MacroAssembler::fcmp(Register tmp) { 2983 fcmp(tmp, 1, true, true); 2984 } 2985 2986 void MacroAssembler::fcmp(Register tmp, int index, bool pop_left, bool pop_right) { 2987 assert(!pop_right || pop_left, "usage error"); 2988 if (VM_Version::supports_cmov()) { 2989 assert(tmp == noreg, "unneeded temp"); 2990 if (pop_left) { 2991 fucomip(index); 2992 } else { 2993 fucomi(index); 2994 } 2995 if (pop_right) { 2996 fpop(); 2997 } 2998 } else { 2999 assert(tmp != noreg, "need temp"); 3000 if (pop_left) { 3001 if (pop_right) { 3002 fcompp(); 3003 } else { 3004 fcomp(index); 3005 } 3006 } else { 3007 fcom(index); 3008 } 3009 // convert FPU condition into eflags condition via rax, 3010 save_rax(tmp); 3011 fwait(); fnstsw_ax(); 3012 sahf(); 3013 restore_rax(tmp); 3014 } 3015 // condition codes set as follows: 3016 // 3017 // CF (corresponds to C0) if x < y 3018 // PF (corresponds to C2) if unordered 3019 // ZF (corresponds to C3) if x = y 3020 } 3021 3022 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less) { 3023 fcmp2int(dst, unordered_is_less, 1, true, true); 3024 } 3025 3026 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less, int index, bool pop_left, bool pop_right) { 3027 fcmp(VM_Version::supports_cmov() ? noreg : dst, index, pop_left, pop_right); 3028 Label L; 3029 if (unordered_is_less) { 3030 movl(dst, -1); 3031 jcc(Assembler::parity, L); 3032 jcc(Assembler::below , L); 3033 movl(dst, 0); 3034 jcc(Assembler::equal , L); 3035 increment(dst); 3036 } else { // unordered is greater 3037 movl(dst, 1); 3038 jcc(Assembler::parity, L); 3039 jcc(Assembler::above , L); 3040 movl(dst, 0); 3041 jcc(Assembler::equal , L); 3042 decrementl(dst); 3043 } 3044 bind(L); 3045 } 3046 3047 void MacroAssembler::fld_d(AddressLiteral src) { 3048 fld_d(as_Address(src)); 3049 } 3050 3051 void MacroAssembler::fld_s(AddressLiteral src) { 3052 fld_s(as_Address(src)); 3053 } 3054 3055 void MacroAssembler::fld_x(AddressLiteral src) { 3056 Assembler::fld_x(as_Address(src)); 3057 } 3058 3059 void MacroAssembler::fldcw(AddressLiteral src) { 3060 Assembler::fldcw(as_Address(src)); 3061 } 3062 3063 void MacroAssembler::mulpd(XMMRegister dst, AddressLiteral src) { 3064 if (reachable(src)) { 3065 Assembler::mulpd(dst, as_Address(src)); 3066 } else { 3067 lea(rscratch1, src); 3068 Assembler::mulpd(dst, Address(rscratch1, 0)); 3069 } 3070 } 3071 3072 void MacroAssembler::increase_precision() { 3073 subptr(rsp, BytesPerWord); 3074 fnstcw(Address(rsp, 0)); 3075 movl(rax, Address(rsp, 0)); 3076 orl(rax, 0x300); 3077 push(rax); 3078 fldcw(Address(rsp, 0)); 3079 pop(rax); 3080 } 3081 3082 void MacroAssembler::restore_precision() { 3083 fldcw(Address(rsp, 0)); 3084 addptr(rsp, BytesPerWord); 3085 } 3086 3087 void MacroAssembler::fpop() { 3088 ffree(); 3089 fincstp(); 3090 } 3091 3092 void MacroAssembler::load_float(Address src) { 3093 if (UseSSE >= 1) { 3094 movflt(xmm0, src); 3095 } else { 3096 LP64_ONLY(ShouldNotReachHere()); 3097 NOT_LP64(fld_s(src)); 3098 } 3099 } 3100 3101 void MacroAssembler::store_float(Address dst) { 3102 if (UseSSE >= 1) { 3103 movflt(dst, xmm0); 3104 } else { 3105 LP64_ONLY(ShouldNotReachHere()); 3106 NOT_LP64(fstp_s(dst)); 3107 } 3108 } 3109 3110 void MacroAssembler::load_double(Address src) { 3111 if (UseSSE >= 2) { 3112 movdbl(xmm0, src); 3113 } else { 3114 LP64_ONLY(ShouldNotReachHere()); 3115 NOT_LP64(fld_d(src)); 3116 } 3117 } 3118 3119 void MacroAssembler::store_double(Address dst) { 3120 if (UseSSE >= 2) { 3121 movdbl(dst, xmm0); 3122 } else { 3123 LP64_ONLY(ShouldNotReachHere()); 3124 NOT_LP64(fstp_d(dst)); 3125 } 3126 } 3127 3128 void MacroAssembler::fremr(Register tmp) { 3129 save_rax(tmp); 3130 { Label L; 3131 bind(L); 3132 fprem(); 3133 fwait(); fnstsw_ax(); 3134 #ifdef _LP64 3135 testl(rax, 0x400); 3136 jcc(Assembler::notEqual, L); 3137 #else 3138 sahf(); 3139 jcc(Assembler::parity, L); 3140 #endif // _LP64 3141 } 3142 restore_rax(tmp); 3143 // Result is in ST0. 3144 // Note: fxch & fpop to get rid of ST1 3145 // (otherwise FPU stack could overflow eventually) 3146 fxch(1); 3147 fpop(); 3148 } 3149 3150 3151 void MacroAssembler::incrementl(AddressLiteral dst) { 3152 if (reachable(dst)) { 3153 incrementl(as_Address(dst)); 3154 } else { 3155 lea(rscratch1, dst); 3156 incrementl(Address(rscratch1, 0)); 3157 } 3158 } 3159 3160 void MacroAssembler::incrementl(ArrayAddress dst) { 3161 incrementl(as_Address(dst)); 3162 } 3163 3164 void MacroAssembler::incrementl(Register reg, int value) { 3165 if (value == min_jint) {addl(reg, value) ; return; } 3166 if (value < 0) { decrementl(reg, -value); return; } 3167 if (value == 0) { ; return; } 3168 if (value == 1 && UseIncDec) { incl(reg) ; return; } 3169 /* else */ { addl(reg, value) ; return; } 3170 } 3171 3172 void MacroAssembler::incrementl(Address dst, int value) { 3173 if (value == min_jint) {addl(dst, value) ; return; } 3174 if (value < 0) { decrementl(dst, -value); return; } 3175 if (value == 0) { ; return; } 3176 if (value == 1 && UseIncDec) { incl(dst) ; return; } 3177 /* else */ { addl(dst, value) ; return; } 3178 } 3179 3180 void MacroAssembler::jump(AddressLiteral dst) { 3181 if (reachable(dst)) { 3182 jmp_literal(dst.target(), dst.rspec()); 3183 } else { 3184 lea(rscratch1, dst); 3185 jmp(rscratch1); 3186 } 3187 } 3188 3189 void MacroAssembler::jump_cc(Condition cc, AddressLiteral dst) { 3190 if (reachable(dst)) { 3191 InstructionMark im(this); 3192 relocate(dst.reloc()); 3193 const int short_size = 2; 3194 const int long_size = 6; 3195 int offs = (intptr_t)dst.target() - ((intptr_t)pc()); 3196 if (dst.reloc() == relocInfo::none && is8bit(offs - short_size)) { 3197 // 0111 tttn #8-bit disp 3198 emit_int8(0x70 | cc); 3199 emit_int8((offs - short_size) & 0xFF); 3200 } else { 3201 // 0000 1111 1000 tttn #32-bit disp 3202 emit_int8(0x0F); 3203 emit_int8((unsigned char)(0x80 | cc)); 3204 emit_int32(offs - long_size); 3205 } 3206 } else { 3207 #ifdef ASSERT 3208 warning("reversing conditional branch"); 3209 #endif /* ASSERT */ 3210 Label skip; 3211 jccb(reverse[cc], skip); 3212 lea(rscratch1, dst); 3213 Assembler::jmp(rscratch1); 3214 bind(skip); 3215 } 3216 } 3217 3218 void MacroAssembler::ldmxcsr(AddressLiteral src) { 3219 if (reachable(src)) { 3220 Assembler::ldmxcsr(as_Address(src)); 3221 } else { 3222 lea(rscratch1, src); 3223 Assembler::ldmxcsr(Address(rscratch1, 0)); 3224 } 3225 } 3226 3227 int MacroAssembler::load_signed_byte(Register dst, Address src) { 3228 int off; 3229 if (LP64_ONLY(true ||) VM_Version::is_P6()) { 3230 off = offset(); 3231 movsbl(dst, src); // movsxb 3232 } else { 3233 off = load_unsigned_byte(dst, src); 3234 shll(dst, 24); 3235 sarl(dst, 24); 3236 } 3237 return off; 3238 } 3239 3240 // Note: load_signed_short used to be called load_signed_word. 3241 // Although the 'w' in x86 opcodes refers to the term "word" in the assembler 3242 // manual, which means 16 bits, that usage is found nowhere in HotSpot code. 3243 // The term "word" in HotSpot means a 32- or 64-bit machine word. 3244 int MacroAssembler::load_signed_short(Register dst, Address src) { 3245 int off; 3246 if (LP64_ONLY(true ||) VM_Version::is_P6()) { 3247 // This is dubious to me since it seems safe to do a signed 16 => 64 bit 3248 // version but this is what 64bit has always done. This seems to imply 3249 // that users are only using 32bits worth. 3250 off = offset(); 3251 movswl(dst, src); // movsxw 3252 } else { 3253 off = load_unsigned_short(dst, src); 3254 shll(dst, 16); 3255 sarl(dst, 16); 3256 } 3257 return off; 3258 } 3259 3260 int MacroAssembler::load_unsigned_byte(Register dst, Address src) { 3261 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16, 3262 // and "3.9 Partial Register Penalties", p. 22). 3263 int off; 3264 if (LP64_ONLY(true || ) VM_Version::is_P6() || src.uses(dst)) { 3265 off = offset(); 3266 movzbl(dst, src); // movzxb 3267 } else { 3268 xorl(dst, dst); 3269 off = offset(); 3270 movb(dst, src); 3271 } 3272 return off; 3273 } 3274 3275 // Note: load_unsigned_short used to be called load_unsigned_word. 3276 int MacroAssembler::load_unsigned_short(Register dst, Address src) { 3277 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16, 3278 // and "3.9 Partial Register Penalties", p. 22). 3279 int off; 3280 if (LP64_ONLY(true ||) VM_Version::is_P6() || src.uses(dst)) { 3281 off = offset(); 3282 movzwl(dst, src); // movzxw 3283 } else { 3284 xorl(dst, dst); 3285 off = offset(); 3286 movw(dst, src); 3287 } 3288 return off; 3289 } 3290 3291 void MacroAssembler::load_sized_value(Register dst, Address src, size_t size_in_bytes, bool is_signed, Register dst2) { 3292 switch (size_in_bytes) { 3293 #ifndef _LP64 3294 case 8: 3295 assert(dst2 != noreg, "second dest register required"); 3296 movl(dst, src); 3297 movl(dst2, src.plus_disp(BytesPerInt)); 3298 break; 3299 #else 3300 case 8: movq(dst, src); break; 3301 #endif 3302 case 4: movl(dst, src); break; 3303 case 2: is_signed ? load_signed_short(dst, src) : load_unsigned_short(dst, src); break; 3304 case 1: is_signed ? load_signed_byte( dst, src) : load_unsigned_byte( dst, src); break; 3305 default: ShouldNotReachHere(); 3306 } 3307 } 3308 3309 void MacroAssembler::store_sized_value(Address dst, Register src, size_t size_in_bytes, Register src2) { 3310 switch (size_in_bytes) { 3311 #ifndef _LP64 3312 case 8: 3313 assert(src2 != noreg, "second source register required"); 3314 movl(dst, src); 3315 movl(dst.plus_disp(BytesPerInt), src2); 3316 break; 3317 #else 3318 case 8: movq(dst, src); break; 3319 #endif 3320 case 4: movl(dst, src); break; 3321 case 2: movw(dst, src); break; 3322 case 1: movb(dst, src); break; 3323 default: ShouldNotReachHere(); 3324 } 3325 } 3326 3327 void MacroAssembler::mov32(AddressLiteral dst, Register src) { 3328 if (reachable(dst)) { 3329 movl(as_Address(dst), src); 3330 } else { 3331 lea(rscratch1, dst); 3332 movl(Address(rscratch1, 0), src); 3333 } 3334 } 3335 3336 void MacroAssembler::mov32(Register dst, AddressLiteral src) { 3337 if (reachable(src)) { 3338 movl(dst, as_Address(src)); 3339 } else { 3340 lea(rscratch1, src); 3341 movl(dst, Address(rscratch1, 0)); 3342 } 3343 } 3344 3345 // C++ bool manipulation 3346 3347 void MacroAssembler::movbool(Register dst, Address src) { 3348 if(sizeof(bool) == 1) 3349 movb(dst, src); 3350 else if(sizeof(bool) == 2) 3351 movw(dst, src); 3352 else if(sizeof(bool) == 4) 3353 movl(dst, src); 3354 else 3355 // unsupported 3356 ShouldNotReachHere(); 3357 } 3358 3359 void MacroAssembler::movbool(Address dst, bool boolconst) { 3360 if(sizeof(bool) == 1) 3361 movb(dst, (int) boolconst); 3362 else if(sizeof(bool) == 2) 3363 movw(dst, (int) boolconst); 3364 else if(sizeof(bool) == 4) 3365 movl(dst, (int) boolconst); 3366 else 3367 // unsupported 3368 ShouldNotReachHere(); 3369 } 3370 3371 void MacroAssembler::movbool(Address dst, Register src) { 3372 if(sizeof(bool) == 1) 3373 movb(dst, src); 3374 else if(sizeof(bool) == 2) 3375 movw(dst, src); 3376 else if(sizeof(bool) == 4) 3377 movl(dst, src); 3378 else 3379 // unsupported 3380 ShouldNotReachHere(); 3381 } 3382 3383 void MacroAssembler::movbyte(ArrayAddress dst, int src) { 3384 movb(as_Address(dst), src); 3385 } 3386 3387 void MacroAssembler::movdl(XMMRegister dst, AddressLiteral src) { 3388 if (reachable(src)) { 3389 movdl(dst, as_Address(src)); 3390 } else { 3391 lea(rscratch1, src); 3392 movdl(dst, Address(rscratch1, 0)); 3393 } 3394 } 3395 3396 void MacroAssembler::movq(XMMRegister dst, AddressLiteral src) { 3397 if (reachable(src)) { 3398 movq(dst, as_Address(src)); 3399 } else { 3400 lea(rscratch1, src); 3401 movq(dst, Address(rscratch1, 0)); 3402 } 3403 } 3404 3405 void MacroAssembler::movdbl(XMMRegister dst, AddressLiteral src) { 3406 if (reachable(src)) { 3407 if (UseXmmLoadAndClearUpper) { 3408 movsd (dst, as_Address(src)); 3409 } else { 3410 movlpd(dst, as_Address(src)); 3411 } 3412 } else { 3413 lea(rscratch1, src); 3414 if (UseXmmLoadAndClearUpper) { 3415 movsd (dst, Address(rscratch1, 0)); 3416 } else { 3417 movlpd(dst, Address(rscratch1, 0)); 3418 } 3419 } 3420 } 3421 3422 void MacroAssembler::movflt(XMMRegister dst, AddressLiteral src) { 3423 if (reachable(src)) { 3424 movss(dst, as_Address(src)); 3425 } else { 3426 lea(rscratch1, src); 3427 movss(dst, Address(rscratch1, 0)); 3428 } 3429 } 3430 3431 void MacroAssembler::movptr(Register dst, Register src) { 3432 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src)); 3433 } 3434 3435 void MacroAssembler::movptr(Register dst, Address src) { 3436 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src)); 3437 } 3438 3439 // src should NEVER be a real pointer. Use AddressLiteral for true pointers 3440 void MacroAssembler::movptr(Register dst, intptr_t src) { 3441 LP64_ONLY(mov64(dst, src)) NOT_LP64(movl(dst, src)); 3442 } 3443 3444 void MacroAssembler::movptr(Address dst, Register src) { 3445 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src)); 3446 } 3447 3448 void MacroAssembler::movdqu(Address dst, XMMRegister src) { 3449 if (UseAVX > 2 && !VM_Version::supports_avx512vl() && (src->encoding() > 15)) { 3450 Assembler::vextractf32x4h(dst, src, 0); 3451 } else { 3452 Assembler::movdqu(dst, src); 3453 } 3454 } 3455 3456 void MacroAssembler::movdqu(XMMRegister dst, Address src) { 3457 if (UseAVX > 2 && !VM_Version::supports_avx512vl() && (dst->encoding() > 15)) { 3458 Assembler::vinsertf32x4h(dst, src, 0); 3459 } else { 3460 Assembler::movdqu(dst, src); 3461 } 3462 } 3463 3464 void MacroAssembler::movdqu(XMMRegister dst, XMMRegister src) { 3465 if (UseAVX > 2 && !VM_Version::supports_avx512vl()) { 3466 Assembler::evmovdqul(dst, src, Assembler::AVX_512bit); 3467 } else { 3468 Assembler::movdqu(dst, src); 3469 } 3470 } 3471 3472 void MacroAssembler::movdqu(XMMRegister dst, AddressLiteral src) { 3473 if (reachable(src)) { 3474 movdqu(dst, as_Address(src)); 3475 } else { 3476 lea(rscratch1, src); 3477 movdqu(dst, Address(rscratch1, 0)); 3478 } 3479 } 3480 3481 void MacroAssembler::vmovdqu(Address dst, XMMRegister src) { 3482 if (UseAVX > 2 && !VM_Version::supports_avx512vl() && (src->encoding() > 15)) { 3483 Assembler::vextractf64x4h(dst, src, 0); 3484 } else { 3485 Assembler::vmovdqu(dst, src); 3486 } 3487 } 3488 3489 void MacroAssembler::vmovdqu(XMMRegister dst, Address src) { 3490 if (UseAVX > 2 && !VM_Version::supports_avx512vl() && (dst->encoding() > 15)) { 3491 Assembler::vinsertf64x4h(dst, src, 0); 3492 } else { 3493 Assembler::vmovdqu(dst, src); 3494 } 3495 } 3496 3497 void MacroAssembler::vmovdqu(XMMRegister dst, XMMRegister src) { 3498 if (UseAVX > 2 && !VM_Version::supports_avx512vl()) { 3499 Assembler::evmovdqul(dst, src, Assembler::AVX_512bit); 3500 } 3501 else { 3502 Assembler::vmovdqu(dst, src); 3503 } 3504 } 3505 3506 void MacroAssembler::vmovdqu(XMMRegister dst, AddressLiteral src) { 3507 if (reachable(src)) { 3508 vmovdqu(dst, as_Address(src)); 3509 } 3510 else { 3511 lea(rscratch1, src); 3512 vmovdqu(dst, Address(rscratch1, 0)); 3513 } 3514 } 3515 3516 void MacroAssembler::movdqa(XMMRegister dst, AddressLiteral src) { 3517 if (reachable(src)) { 3518 Assembler::movdqa(dst, as_Address(src)); 3519 } else { 3520 lea(rscratch1, src); 3521 Assembler::movdqa(dst, Address(rscratch1, 0)); 3522 } 3523 } 3524 3525 void MacroAssembler::movsd(XMMRegister dst, AddressLiteral src) { 3526 if (reachable(src)) { 3527 Assembler::movsd(dst, as_Address(src)); 3528 } else { 3529 lea(rscratch1, src); 3530 Assembler::movsd(dst, Address(rscratch1, 0)); 3531 } 3532 } 3533 3534 void MacroAssembler::movss(XMMRegister dst, AddressLiteral src) { 3535 if (reachable(src)) { 3536 Assembler::movss(dst, as_Address(src)); 3537 } else { 3538 lea(rscratch1, src); 3539 Assembler::movss(dst, Address(rscratch1, 0)); 3540 } 3541 } 3542 3543 void MacroAssembler::mulsd(XMMRegister dst, AddressLiteral src) { 3544 if (reachable(src)) { 3545 Assembler::mulsd(dst, as_Address(src)); 3546 } else { 3547 lea(rscratch1, src); 3548 Assembler::mulsd(dst, Address(rscratch1, 0)); 3549 } 3550 } 3551 3552 void MacroAssembler::mulss(XMMRegister dst, AddressLiteral src) { 3553 if (reachable(src)) { 3554 Assembler::mulss(dst, as_Address(src)); 3555 } else { 3556 lea(rscratch1, src); 3557 Assembler::mulss(dst, Address(rscratch1, 0)); 3558 } 3559 } 3560 3561 void MacroAssembler::null_check(Register reg, int offset) { 3562 if (needs_explicit_null_check(offset)) { 3563 // provoke OS NULL exception if reg = NULL by 3564 // accessing M[reg] w/o changing any (non-CC) registers 3565 // NOTE: cmpl is plenty here to provoke a segv 3566 cmpptr(rax, Address(reg, 0)); 3567 // Note: should probably use testl(rax, Address(reg, 0)); 3568 // may be shorter code (however, this version of 3569 // testl needs to be implemented first) 3570 } else { 3571 // nothing to do, (later) access of M[reg + offset] 3572 // will provoke OS NULL exception if reg = NULL 3573 } 3574 } 3575 3576 void MacroAssembler::os_breakpoint() { 3577 // instead of directly emitting a breakpoint, call os:breakpoint for better debugability 3578 // (e.g., MSVC can't call ps() otherwise) 3579 call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint))); 3580 } 3581 3582 #ifdef _LP64 3583 #define XSTATE_BV 0x200 3584 #endif 3585 3586 void MacroAssembler::pop_CPU_state() { 3587 pop_FPU_state(); 3588 pop_IU_state(); 3589 } 3590 3591 void MacroAssembler::pop_FPU_state() { 3592 #ifndef _LP64 3593 frstor(Address(rsp, 0)); 3594 #else 3595 fxrstor(Address(rsp, 0)); 3596 #endif 3597 addptr(rsp, FPUStateSizeInWords * wordSize); 3598 } 3599 3600 void MacroAssembler::pop_IU_state() { 3601 popa(); 3602 LP64_ONLY(addq(rsp, 8)); 3603 popf(); 3604 } 3605 3606 // Save Integer and Float state 3607 // Warning: Stack must be 16 byte aligned (64bit) 3608 void MacroAssembler::push_CPU_state() { 3609 push_IU_state(); 3610 push_FPU_state(); 3611 } 3612 3613 void MacroAssembler::push_FPU_state() { 3614 subptr(rsp, FPUStateSizeInWords * wordSize); 3615 #ifndef _LP64 3616 fnsave(Address(rsp, 0)); 3617 fwait(); 3618 #else 3619 fxsave(Address(rsp, 0)); 3620 #endif // LP64 3621 } 3622 3623 void MacroAssembler::push_IU_state() { 3624 // Push flags first because pusha kills them 3625 pushf(); 3626 // Make sure rsp stays 16-byte aligned 3627 LP64_ONLY(subq(rsp, 8)); 3628 pusha(); 3629 } 3630 3631 void MacroAssembler::reset_last_Java_frame(Register java_thread, bool clear_fp, bool clear_pc) { 3632 // determine java_thread register 3633 if (!java_thread->is_valid()) { 3634 java_thread = rdi; 3635 get_thread(java_thread); 3636 } 3637 // we must set sp to zero to clear frame 3638 movptr(Address(java_thread, JavaThread::last_Java_sp_offset()), NULL_WORD); 3639 if (clear_fp) { 3640 movptr(Address(java_thread, JavaThread::last_Java_fp_offset()), NULL_WORD); 3641 } 3642 3643 if (clear_pc) 3644 movptr(Address(java_thread, JavaThread::last_Java_pc_offset()), NULL_WORD); 3645 3646 } 3647 3648 void MacroAssembler::restore_rax(Register tmp) { 3649 if (tmp == noreg) pop(rax); 3650 else if (tmp != rax) mov(rax, tmp); 3651 } 3652 3653 void MacroAssembler::round_to(Register reg, int modulus) { 3654 addptr(reg, modulus - 1); 3655 andptr(reg, -modulus); 3656 } 3657 3658 void MacroAssembler::save_rax(Register tmp) { 3659 if (tmp == noreg) push(rax); 3660 else if (tmp != rax) mov(tmp, rax); 3661 } 3662 3663 // Write serialization page so VM thread can do a pseudo remote membar. 3664 // We use the current thread pointer to calculate a thread specific 3665 // offset to write to within the page. This minimizes bus traffic 3666 // due to cache line collision. 3667 void MacroAssembler::serialize_memory(Register thread, Register tmp) { 3668 movl(tmp, thread); 3669 shrl(tmp, os::get_serialize_page_shift_count()); 3670 andl(tmp, (os::vm_page_size() - sizeof(int))); 3671 3672 Address index(noreg, tmp, Address::times_1); 3673 ExternalAddress page(os::get_memory_serialize_page()); 3674 3675 // Size of store must match masking code above 3676 movl(as_Address(ArrayAddress(page, index)), tmp); 3677 } 3678 3679 // Calls to C land 3680 // 3681 // When entering C land, the rbp, & rsp of the last Java frame have to be recorded 3682 // in the (thread-local) JavaThread object. When leaving C land, the last Java fp 3683 // has to be reset to 0. This is required to allow proper stack traversal. 3684 void MacroAssembler::set_last_Java_frame(Register java_thread, 3685 Register last_java_sp, 3686 Register last_java_fp, 3687 address last_java_pc) { 3688 // determine java_thread register 3689 if (!java_thread->is_valid()) { 3690 java_thread = rdi; 3691 get_thread(java_thread); 3692 } 3693 // determine last_java_sp register 3694 if (!last_java_sp->is_valid()) { 3695 last_java_sp = rsp; 3696 } 3697 3698 // last_java_fp is optional 3699 3700 if (last_java_fp->is_valid()) { 3701 movptr(Address(java_thread, JavaThread::last_Java_fp_offset()), last_java_fp); 3702 } 3703 3704 // last_java_pc is optional 3705 3706 if (last_java_pc != NULL) { 3707 lea(Address(java_thread, 3708 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset()), 3709 InternalAddress(last_java_pc)); 3710 3711 } 3712 movptr(Address(java_thread, JavaThread::last_Java_sp_offset()), last_java_sp); 3713 } 3714 3715 void MacroAssembler::shlptr(Register dst, int imm8) { 3716 LP64_ONLY(shlq(dst, imm8)) NOT_LP64(shll(dst, imm8)); 3717 } 3718 3719 void MacroAssembler::shrptr(Register dst, int imm8) { 3720 LP64_ONLY(shrq(dst, imm8)) NOT_LP64(shrl(dst, imm8)); 3721 } 3722 3723 void MacroAssembler::sign_extend_byte(Register reg) { 3724 if (LP64_ONLY(true ||) (VM_Version::is_P6() && reg->has_byte_register())) { 3725 movsbl(reg, reg); // movsxb 3726 } else { 3727 shll(reg, 24); 3728 sarl(reg, 24); 3729 } 3730 } 3731 3732 void MacroAssembler::sign_extend_short(Register reg) { 3733 if (LP64_ONLY(true ||) VM_Version::is_P6()) { 3734 movswl(reg, reg); // movsxw 3735 } else { 3736 shll(reg, 16); 3737 sarl(reg, 16); 3738 } 3739 } 3740 3741 void MacroAssembler::testl(Register dst, AddressLiteral src) { 3742 assert(reachable(src), "Address should be reachable"); 3743 testl(dst, as_Address(src)); 3744 } 3745 3746 void MacroAssembler::pcmpeqb(XMMRegister dst, XMMRegister src) { 3747 int dst_enc = dst->encoding(); 3748 int src_enc = src->encoding(); 3749 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 3750 Assembler::pcmpeqb(dst, src); 3751 } else if ((dst_enc < 16) && (src_enc < 16)) { 3752 Assembler::pcmpeqb(dst, src); 3753 } else if (src_enc < 16) { 3754 subptr(rsp, 64); 3755 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3756 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 3757 Assembler::pcmpeqb(xmm0, src); 3758 movdqu(dst, xmm0); 3759 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3760 addptr(rsp, 64); 3761 } else if (dst_enc < 16) { 3762 subptr(rsp, 64); 3763 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3764 evmovdqul(xmm0, src, Assembler::AVX_512bit); 3765 Assembler::pcmpeqb(dst, xmm0); 3766 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3767 addptr(rsp, 64); 3768 } else { 3769 subptr(rsp, 64); 3770 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3771 subptr(rsp, 64); 3772 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 3773 movdqu(xmm0, src); 3774 movdqu(xmm1, dst); 3775 Assembler::pcmpeqb(xmm1, xmm0); 3776 movdqu(dst, xmm1); 3777 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 3778 addptr(rsp, 64); 3779 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3780 addptr(rsp, 64); 3781 } 3782 } 3783 3784 void MacroAssembler::pcmpeqw(XMMRegister dst, XMMRegister src) { 3785 int dst_enc = dst->encoding(); 3786 int src_enc = src->encoding(); 3787 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 3788 Assembler::pcmpeqw(dst, src); 3789 } else if ((dst_enc < 16) && (src_enc < 16)) { 3790 Assembler::pcmpeqw(dst, src); 3791 } else if (src_enc < 16) { 3792 subptr(rsp, 64); 3793 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3794 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 3795 Assembler::pcmpeqw(xmm0, src); 3796 movdqu(dst, xmm0); 3797 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3798 addptr(rsp, 64); 3799 } else if (dst_enc < 16) { 3800 subptr(rsp, 64); 3801 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3802 evmovdqul(xmm0, src, Assembler::AVX_512bit); 3803 Assembler::pcmpeqw(dst, xmm0); 3804 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3805 addptr(rsp, 64); 3806 } else { 3807 subptr(rsp, 64); 3808 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3809 subptr(rsp, 64); 3810 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 3811 movdqu(xmm0, src); 3812 movdqu(xmm1, dst); 3813 Assembler::pcmpeqw(xmm1, xmm0); 3814 movdqu(dst, xmm1); 3815 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 3816 addptr(rsp, 64); 3817 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3818 addptr(rsp, 64); 3819 } 3820 } 3821 3822 void MacroAssembler::pcmpestri(XMMRegister dst, Address src, int imm8) { 3823 int dst_enc = dst->encoding(); 3824 if (dst_enc < 16) { 3825 Assembler::pcmpestri(dst, src, imm8); 3826 } else { 3827 subptr(rsp, 64); 3828 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3829 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 3830 Assembler::pcmpestri(xmm0, src, imm8); 3831 movdqu(dst, xmm0); 3832 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3833 addptr(rsp, 64); 3834 } 3835 } 3836 3837 void MacroAssembler::pcmpestri(XMMRegister dst, XMMRegister src, int imm8) { 3838 int dst_enc = dst->encoding(); 3839 int src_enc = src->encoding(); 3840 if ((dst_enc < 16) && (src_enc < 16)) { 3841 Assembler::pcmpestri(dst, src, imm8); 3842 } else if (src_enc < 16) { 3843 subptr(rsp, 64); 3844 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3845 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 3846 Assembler::pcmpestri(xmm0, src, imm8); 3847 movdqu(dst, xmm0); 3848 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3849 addptr(rsp, 64); 3850 } else if (dst_enc < 16) { 3851 subptr(rsp, 64); 3852 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3853 evmovdqul(xmm0, src, Assembler::AVX_512bit); 3854 Assembler::pcmpestri(dst, xmm0, imm8); 3855 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3856 addptr(rsp, 64); 3857 } else { 3858 subptr(rsp, 64); 3859 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3860 subptr(rsp, 64); 3861 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 3862 movdqu(xmm0, src); 3863 movdqu(xmm1, dst); 3864 Assembler::pcmpestri(xmm1, xmm0, imm8); 3865 movdqu(dst, xmm1); 3866 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 3867 addptr(rsp, 64); 3868 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3869 addptr(rsp, 64); 3870 } 3871 } 3872 3873 void MacroAssembler::pmovzxbw(XMMRegister dst, XMMRegister src) { 3874 int dst_enc = dst->encoding(); 3875 int src_enc = src->encoding(); 3876 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 3877 Assembler::pmovzxbw(dst, src); 3878 } else if ((dst_enc < 16) && (src_enc < 16)) { 3879 Assembler::pmovzxbw(dst, src); 3880 } else if (src_enc < 16) { 3881 subptr(rsp, 64); 3882 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3883 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 3884 Assembler::pmovzxbw(xmm0, src); 3885 movdqu(dst, xmm0); 3886 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3887 addptr(rsp, 64); 3888 } else if (dst_enc < 16) { 3889 subptr(rsp, 64); 3890 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3891 evmovdqul(xmm0, src, Assembler::AVX_512bit); 3892 Assembler::pmovzxbw(dst, xmm0); 3893 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3894 addptr(rsp, 64); 3895 } else { 3896 subptr(rsp, 64); 3897 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3898 subptr(rsp, 64); 3899 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 3900 movdqu(xmm0, src); 3901 movdqu(xmm1, dst); 3902 Assembler::pmovzxbw(xmm1, xmm0); 3903 movdqu(dst, xmm1); 3904 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 3905 addptr(rsp, 64); 3906 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3907 addptr(rsp, 64); 3908 } 3909 } 3910 3911 void MacroAssembler::pmovzxbw(XMMRegister dst, Address src) { 3912 int dst_enc = dst->encoding(); 3913 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 3914 Assembler::pmovzxbw(dst, src); 3915 } else if (dst_enc < 16) { 3916 Assembler::pmovzxbw(dst, src); 3917 } else { 3918 subptr(rsp, 64); 3919 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3920 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 3921 Assembler::pmovzxbw(xmm0, src); 3922 movdqu(dst, xmm0); 3923 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3924 addptr(rsp, 64); 3925 } 3926 } 3927 3928 void MacroAssembler::pmovmskb(Register dst, XMMRegister src) { 3929 int src_enc = src->encoding(); 3930 if (src_enc < 16) { 3931 Assembler::pmovmskb(dst, src); 3932 } else { 3933 subptr(rsp, 64); 3934 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3935 evmovdqul(xmm0, src, Assembler::AVX_512bit); 3936 Assembler::pmovmskb(dst, xmm0); 3937 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3938 addptr(rsp, 64); 3939 } 3940 } 3941 3942 void MacroAssembler::ptest(XMMRegister dst, XMMRegister src) { 3943 int dst_enc = dst->encoding(); 3944 int src_enc = src->encoding(); 3945 if ((dst_enc < 16) && (src_enc < 16)) { 3946 Assembler::ptest(dst, src); 3947 } else if (src_enc < 16) { 3948 subptr(rsp, 64); 3949 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3950 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 3951 Assembler::ptest(xmm0, src); 3952 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3953 addptr(rsp, 64); 3954 } else if (dst_enc < 16) { 3955 subptr(rsp, 64); 3956 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3957 evmovdqul(xmm0, src, Assembler::AVX_512bit); 3958 Assembler::ptest(dst, xmm0); 3959 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3960 addptr(rsp, 64); 3961 } else { 3962 subptr(rsp, 64); 3963 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 3964 subptr(rsp, 64); 3965 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 3966 movdqu(xmm0, src); 3967 movdqu(xmm1, dst); 3968 Assembler::ptest(xmm1, xmm0); 3969 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 3970 addptr(rsp, 64); 3971 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 3972 addptr(rsp, 64); 3973 } 3974 } 3975 3976 void MacroAssembler::sqrtsd(XMMRegister dst, AddressLiteral src) { 3977 if (reachable(src)) { 3978 Assembler::sqrtsd(dst, as_Address(src)); 3979 } else { 3980 lea(rscratch1, src); 3981 Assembler::sqrtsd(dst, Address(rscratch1, 0)); 3982 } 3983 } 3984 3985 void MacroAssembler::sqrtss(XMMRegister dst, AddressLiteral src) { 3986 if (reachable(src)) { 3987 Assembler::sqrtss(dst, as_Address(src)); 3988 } else { 3989 lea(rscratch1, src); 3990 Assembler::sqrtss(dst, Address(rscratch1, 0)); 3991 } 3992 } 3993 3994 void MacroAssembler::subsd(XMMRegister dst, AddressLiteral src) { 3995 if (reachable(src)) { 3996 Assembler::subsd(dst, as_Address(src)); 3997 } else { 3998 lea(rscratch1, src); 3999 Assembler::subsd(dst, Address(rscratch1, 0)); 4000 } 4001 } 4002 4003 void MacroAssembler::subss(XMMRegister dst, AddressLiteral src) { 4004 if (reachable(src)) { 4005 Assembler::subss(dst, as_Address(src)); 4006 } else { 4007 lea(rscratch1, src); 4008 Assembler::subss(dst, Address(rscratch1, 0)); 4009 } 4010 } 4011 4012 void MacroAssembler::ucomisd(XMMRegister dst, AddressLiteral src) { 4013 if (reachable(src)) { 4014 Assembler::ucomisd(dst, as_Address(src)); 4015 } else { 4016 lea(rscratch1, src); 4017 Assembler::ucomisd(dst, Address(rscratch1, 0)); 4018 } 4019 } 4020 4021 void MacroAssembler::ucomiss(XMMRegister dst, AddressLiteral src) { 4022 if (reachable(src)) { 4023 Assembler::ucomiss(dst, as_Address(src)); 4024 } else { 4025 lea(rscratch1, src); 4026 Assembler::ucomiss(dst, Address(rscratch1, 0)); 4027 } 4028 } 4029 4030 void MacroAssembler::xorpd(XMMRegister dst, AddressLiteral src) { 4031 // Used in sign-bit flipping with aligned address. 4032 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes"); 4033 if (reachable(src)) { 4034 Assembler::xorpd(dst, as_Address(src)); 4035 } else { 4036 lea(rscratch1, src); 4037 Assembler::xorpd(dst, Address(rscratch1, 0)); 4038 } 4039 } 4040 4041 void MacroAssembler::xorpd(XMMRegister dst, XMMRegister src) { 4042 if (UseAVX > 2 && !VM_Version::supports_avx512dq() && (dst->encoding() == src->encoding())) { 4043 Assembler::vpxor(dst, dst, src, Assembler::AVX_512bit); 4044 } 4045 else { 4046 Assembler::xorpd(dst, src); 4047 } 4048 } 4049 4050 void MacroAssembler::xorps(XMMRegister dst, XMMRegister src) { 4051 if (UseAVX > 2 && !VM_Version::supports_avx512dq() && (dst->encoding() == src->encoding())) { 4052 Assembler::vpxor(dst, dst, src, Assembler::AVX_512bit); 4053 } else { 4054 Assembler::xorps(dst, src); 4055 } 4056 } 4057 4058 void MacroAssembler::xorps(XMMRegister dst, AddressLiteral src) { 4059 // Used in sign-bit flipping with aligned address. 4060 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes"); 4061 if (reachable(src)) { 4062 Assembler::xorps(dst, as_Address(src)); 4063 } else { 4064 lea(rscratch1, src); 4065 Assembler::xorps(dst, Address(rscratch1, 0)); 4066 } 4067 } 4068 4069 void MacroAssembler::pshufb(XMMRegister dst, AddressLiteral src) { 4070 // Used in sign-bit flipping with aligned address. 4071 bool aligned_adr = (((intptr_t)src.target() & 15) == 0); 4072 assert((UseAVX > 0) || aligned_adr, "SSE mode requires address alignment 16 bytes"); 4073 if (reachable(src)) { 4074 Assembler::pshufb(dst, as_Address(src)); 4075 } else { 4076 lea(rscratch1, src); 4077 Assembler::pshufb(dst, Address(rscratch1, 0)); 4078 } 4079 } 4080 4081 // AVX 3-operands instructions 4082 4083 void MacroAssembler::vaddsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { 4084 if (reachable(src)) { 4085 vaddsd(dst, nds, as_Address(src)); 4086 } else { 4087 lea(rscratch1, src); 4088 vaddsd(dst, nds, Address(rscratch1, 0)); 4089 } 4090 } 4091 4092 void MacroAssembler::vaddss(XMMRegister dst, XMMRegister nds, AddressLiteral src) { 4093 if (reachable(src)) { 4094 vaddss(dst, nds, as_Address(src)); 4095 } else { 4096 lea(rscratch1, src); 4097 vaddss(dst, nds, Address(rscratch1, 0)); 4098 } 4099 } 4100 4101 void MacroAssembler::vabsss(XMMRegister dst, XMMRegister nds, XMMRegister src, AddressLiteral negate_field, int vector_len) { 4102 int dst_enc = dst->encoding(); 4103 int nds_enc = nds->encoding(); 4104 int src_enc = src->encoding(); 4105 if ((dst_enc < 16) && (nds_enc < 16)) { 4106 vandps(dst, nds, negate_field, vector_len); 4107 } else if ((src_enc < 16) && (dst_enc < 16)) { 4108 movss(src, nds); 4109 vandps(dst, src, negate_field, vector_len); 4110 } else if (src_enc < 16) { 4111 movss(src, nds); 4112 vandps(src, src, negate_field, vector_len); 4113 movss(dst, src); 4114 } else if (dst_enc < 16) { 4115 movdqu(src, xmm0); 4116 movss(xmm0, nds); 4117 vandps(dst, xmm0, negate_field, vector_len); 4118 movdqu(xmm0, src); 4119 } else if (nds_enc < 16) { 4120 movdqu(src, xmm0); 4121 vandps(xmm0, nds, negate_field, vector_len); 4122 movss(dst, xmm0); 4123 movdqu(xmm0, src); 4124 } else { 4125 movdqu(src, xmm0); 4126 movss(xmm0, nds); 4127 vandps(xmm0, xmm0, negate_field, vector_len); 4128 movss(dst, xmm0); 4129 movdqu(xmm0, src); 4130 } 4131 } 4132 4133 void MacroAssembler::vabssd(XMMRegister dst, XMMRegister nds, XMMRegister src, AddressLiteral negate_field, int vector_len) { 4134 int dst_enc = dst->encoding(); 4135 int nds_enc = nds->encoding(); 4136 int src_enc = src->encoding(); 4137 if ((dst_enc < 16) && (nds_enc < 16)) { 4138 vandpd(dst, nds, negate_field, vector_len); 4139 } else if ((src_enc < 16) && (dst_enc < 16)) { 4140 movsd(src, nds); 4141 vandpd(dst, src, negate_field, vector_len); 4142 } else if (src_enc < 16) { 4143 movsd(src, nds); 4144 vandpd(src, src, negate_field, vector_len); 4145 movsd(dst, src); 4146 } else if (dst_enc < 16) { 4147 movdqu(src, xmm0); 4148 movsd(xmm0, nds); 4149 vandpd(dst, xmm0, negate_field, vector_len); 4150 movdqu(xmm0, src); 4151 } else if (nds_enc < 16) { 4152 movdqu(src, xmm0); 4153 vandpd(xmm0, nds, negate_field, vector_len); 4154 movsd(dst, xmm0); 4155 movdqu(xmm0, src); 4156 } else { 4157 movdqu(src, xmm0); 4158 movsd(xmm0, nds); 4159 vandpd(xmm0, xmm0, negate_field, vector_len); 4160 movsd(dst, xmm0); 4161 movdqu(xmm0, src); 4162 } 4163 } 4164 4165 void MacroAssembler::vpaddb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) { 4166 int dst_enc = dst->encoding(); 4167 int nds_enc = nds->encoding(); 4168 int src_enc = src->encoding(); 4169 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4170 Assembler::vpaddb(dst, nds, src, vector_len); 4171 } else if ((dst_enc < 16) && (src_enc < 16)) { 4172 Assembler::vpaddb(dst, dst, src, vector_len); 4173 } else if ((dst_enc < 16) && (nds_enc < 16)) { 4174 // use nds as scratch for src 4175 evmovdqul(nds, src, Assembler::AVX_512bit); 4176 Assembler::vpaddb(dst, dst, nds, vector_len); 4177 } else if ((src_enc < 16) && (nds_enc < 16)) { 4178 // use nds as scratch for dst 4179 evmovdqul(nds, dst, Assembler::AVX_512bit); 4180 Assembler::vpaddb(nds, nds, src, vector_len); 4181 evmovdqul(dst, nds, Assembler::AVX_512bit); 4182 } else if (dst_enc < 16) { 4183 // use nds as scatch for xmm0 to hold src 4184 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4185 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4186 Assembler::vpaddb(dst, dst, xmm0, vector_len); 4187 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4188 } else { 4189 // worse case scenario, all regs are in the upper bank 4190 subptr(rsp, 64); 4191 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4192 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4193 evmovdqul(xmm1, src, Assembler::AVX_512bit); 4194 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4195 Assembler::vpaddb(xmm0, xmm0, xmm1, vector_len); 4196 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4197 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4198 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4199 addptr(rsp, 64); 4200 } 4201 } 4202 4203 void MacroAssembler::vpaddb(XMMRegister dst, XMMRegister nds, Address src, int vector_len) { 4204 int dst_enc = dst->encoding(); 4205 int nds_enc = nds->encoding(); 4206 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4207 Assembler::vpaddb(dst, nds, src, vector_len); 4208 } else if (dst_enc < 16) { 4209 Assembler::vpaddb(dst, dst, src, vector_len); 4210 } else if (nds_enc < 16) { 4211 // implies dst_enc in upper bank with src as scratch 4212 evmovdqul(nds, dst, Assembler::AVX_512bit); 4213 Assembler::vpaddb(nds, nds, src, vector_len); 4214 evmovdqul(dst, nds, Assembler::AVX_512bit); 4215 } else { 4216 // worse case scenario, all regs in upper bank 4217 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4218 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4219 Assembler::vpaddb(xmm0, xmm0, src, vector_len); 4220 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4221 } 4222 } 4223 4224 void MacroAssembler::vpaddw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) { 4225 int dst_enc = dst->encoding(); 4226 int nds_enc = nds->encoding(); 4227 int src_enc = src->encoding(); 4228 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4229 Assembler::vpaddw(dst, nds, src, vector_len); 4230 } else if ((dst_enc < 16) && (src_enc < 16)) { 4231 Assembler::vpaddw(dst, dst, src, vector_len); 4232 } else if ((dst_enc < 16) && (nds_enc < 16)) { 4233 // use nds as scratch for src 4234 evmovdqul(nds, src, Assembler::AVX_512bit); 4235 Assembler::vpaddw(dst, dst, nds, vector_len); 4236 } else if ((src_enc < 16) && (nds_enc < 16)) { 4237 // use nds as scratch for dst 4238 evmovdqul(nds, dst, Assembler::AVX_512bit); 4239 Assembler::vpaddw(nds, nds, src, vector_len); 4240 evmovdqul(dst, nds, Assembler::AVX_512bit); 4241 } else if (dst_enc < 16) { 4242 // use nds as scatch for xmm0 to hold src 4243 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4244 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4245 Assembler::vpaddw(dst, dst, xmm0, vector_len); 4246 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4247 } else { 4248 // worse case scenario, all regs are in the upper bank 4249 subptr(rsp, 64); 4250 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4251 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4252 evmovdqul(xmm1, src, Assembler::AVX_512bit); 4253 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4254 Assembler::vpaddw(xmm0, xmm0, xmm1, vector_len); 4255 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4256 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4257 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4258 addptr(rsp, 64); 4259 } 4260 } 4261 4262 void MacroAssembler::vpaddw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) { 4263 int dst_enc = dst->encoding(); 4264 int nds_enc = nds->encoding(); 4265 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4266 Assembler::vpaddw(dst, nds, src, vector_len); 4267 } else if (dst_enc < 16) { 4268 Assembler::vpaddw(dst, dst, src, vector_len); 4269 } else if (nds_enc < 16) { 4270 // implies dst_enc in upper bank with src as scratch 4271 evmovdqul(nds, dst, Assembler::AVX_512bit); 4272 Assembler::vpaddw(nds, nds, src, vector_len); 4273 evmovdqul(dst, nds, Assembler::AVX_512bit); 4274 } else { 4275 // worse case scenario, all regs in upper bank 4276 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4277 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4278 Assembler::vpaddw(xmm0, xmm0, src, vector_len); 4279 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4280 } 4281 } 4282 4283 void MacroAssembler::vpbroadcastw(XMMRegister dst, XMMRegister src) { 4284 int dst_enc = dst->encoding(); 4285 int src_enc = src->encoding(); 4286 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4287 Assembler::vpbroadcastw(dst, src); 4288 } else if ((dst_enc < 16) && (src_enc < 16)) { 4289 Assembler::vpbroadcastw(dst, src); 4290 } else if (src_enc < 16) { 4291 subptr(rsp, 64); 4292 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4293 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4294 Assembler::vpbroadcastw(xmm0, src); 4295 movdqu(dst, xmm0); 4296 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4297 addptr(rsp, 64); 4298 } else if (dst_enc < 16) { 4299 subptr(rsp, 64); 4300 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4301 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4302 Assembler::vpbroadcastw(dst, xmm0); 4303 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4304 addptr(rsp, 64); 4305 } else { 4306 subptr(rsp, 64); 4307 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4308 subptr(rsp, 64); 4309 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4310 movdqu(xmm0, src); 4311 movdqu(xmm1, dst); 4312 Assembler::vpbroadcastw(xmm1, xmm0); 4313 movdqu(dst, xmm1); 4314 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4315 addptr(rsp, 64); 4316 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4317 addptr(rsp, 64); 4318 } 4319 } 4320 4321 void MacroAssembler::vpcmpeqb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) { 4322 int dst_enc = dst->encoding(); 4323 int nds_enc = nds->encoding(); 4324 int src_enc = src->encoding(); 4325 assert(dst_enc == nds_enc, ""); 4326 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4327 Assembler::vpcmpeqb(dst, nds, src, vector_len); 4328 } else if ((dst_enc < 16) && (src_enc < 16)) { 4329 Assembler::vpcmpeqb(dst, nds, src, vector_len); 4330 } else if (src_enc < 16) { 4331 subptr(rsp, 64); 4332 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4333 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4334 Assembler::vpcmpeqb(xmm0, xmm0, src, vector_len); 4335 movdqu(dst, xmm0); 4336 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4337 addptr(rsp, 64); 4338 } else if (dst_enc < 16) { 4339 subptr(rsp, 64); 4340 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4341 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4342 Assembler::vpcmpeqb(dst, dst, xmm0, vector_len); 4343 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4344 addptr(rsp, 64); 4345 } else { 4346 subptr(rsp, 64); 4347 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4348 subptr(rsp, 64); 4349 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4350 movdqu(xmm0, src); 4351 movdqu(xmm1, dst); 4352 Assembler::vpcmpeqb(xmm1, xmm1, xmm0, vector_len); 4353 movdqu(dst, xmm1); 4354 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4355 addptr(rsp, 64); 4356 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4357 addptr(rsp, 64); 4358 } 4359 } 4360 4361 void MacroAssembler::vpcmpeqw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) { 4362 int dst_enc = dst->encoding(); 4363 int nds_enc = nds->encoding(); 4364 int src_enc = src->encoding(); 4365 assert(dst_enc == nds_enc, ""); 4366 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4367 Assembler::vpcmpeqw(dst, nds, src, vector_len); 4368 } else if ((dst_enc < 16) && (src_enc < 16)) { 4369 Assembler::vpcmpeqw(dst, nds, src, vector_len); 4370 } else if (src_enc < 16) { 4371 subptr(rsp, 64); 4372 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4373 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4374 Assembler::vpcmpeqw(xmm0, xmm0, src, vector_len); 4375 movdqu(dst, xmm0); 4376 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4377 addptr(rsp, 64); 4378 } else if (dst_enc < 16) { 4379 subptr(rsp, 64); 4380 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4381 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4382 Assembler::vpcmpeqw(dst, dst, xmm0, vector_len); 4383 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4384 addptr(rsp, 64); 4385 } else { 4386 subptr(rsp, 64); 4387 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4388 subptr(rsp, 64); 4389 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4390 movdqu(xmm0, src); 4391 movdqu(xmm1, dst); 4392 Assembler::vpcmpeqw(xmm1, xmm1, xmm0, vector_len); 4393 movdqu(dst, xmm1); 4394 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4395 addptr(rsp, 64); 4396 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4397 addptr(rsp, 64); 4398 } 4399 } 4400 4401 void MacroAssembler::vpmovzxbw(XMMRegister dst, Address src, int vector_len) { 4402 int dst_enc = dst->encoding(); 4403 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4404 Assembler::vpmovzxbw(dst, src, vector_len); 4405 } else if (dst_enc < 16) { 4406 Assembler::vpmovzxbw(dst, src, vector_len); 4407 } else { 4408 subptr(rsp, 64); 4409 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4410 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4411 Assembler::vpmovzxbw(xmm0, src, vector_len); 4412 movdqu(dst, xmm0); 4413 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4414 addptr(rsp, 64); 4415 } 4416 } 4417 4418 void MacroAssembler::vpmovmskb(Register dst, XMMRegister src) { 4419 int src_enc = src->encoding(); 4420 if (src_enc < 16) { 4421 Assembler::vpmovmskb(dst, src); 4422 } else { 4423 subptr(rsp, 64); 4424 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4425 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4426 Assembler::vpmovmskb(dst, xmm0); 4427 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4428 addptr(rsp, 64); 4429 } 4430 } 4431 4432 void MacroAssembler::vpmullw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) { 4433 int dst_enc = dst->encoding(); 4434 int nds_enc = nds->encoding(); 4435 int src_enc = src->encoding(); 4436 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4437 Assembler::vpmullw(dst, nds, src, vector_len); 4438 } else if ((dst_enc < 16) && (src_enc < 16)) { 4439 Assembler::vpmullw(dst, dst, src, vector_len); 4440 } else if ((dst_enc < 16) && (nds_enc < 16)) { 4441 // use nds as scratch for src 4442 evmovdqul(nds, src, Assembler::AVX_512bit); 4443 Assembler::vpmullw(dst, dst, nds, vector_len); 4444 } else if ((src_enc < 16) && (nds_enc < 16)) { 4445 // use nds as scratch for dst 4446 evmovdqul(nds, dst, Assembler::AVX_512bit); 4447 Assembler::vpmullw(nds, nds, src, vector_len); 4448 evmovdqul(dst, nds, Assembler::AVX_512bit); 4449 } else if (dst_enc < 16) { 4450 // use nds as scatch for xmm0 to hold src 4451 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4452 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4453 Assembler::vpmullw(dst, dst, xmm0, vector_len); 4454 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4455 } else { 4456 // worse case scenario, all regs are in the upper bank 4457 subptr(rsp, 64); 4458 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4459 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4460 evmovdqul(xmm1, src, Assembler::AVX_512bit); 4461 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4462 Assembler::vpmullw(xmm0, xmm0, xmm1, vector_len); 4463 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4464 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4465 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4466 addptr(rsp, 64); 4467 } 4468 } 4469 4470 void MacroAssembler::vpmullw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) { 4471 int dst_enc = dst->encoding(); 4472 int nds_enc = nds->encoding(); 4473 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4474 Assembler::vpmullw(dst, nds, src, vector_len); 4475 } else if (dst_enc < 16) { 4476 Assembler::vpmullw(dst, dst, src, vector_len); 4477 } else if (nds_enc < 16) { 4478 // implies dst_enc in upper bank with src as scratch 4479 evmovdqul(nds, dst, Assembler::AVX_512bit); 4480 Assembler::vpmullw(nds, nds, src, vector_len); 4481 evmovdqul(dst, nds, Assembler::AVX_512bit); 4482 } else { 4483 // worse case scenario, all regs in upper bank 4484 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4485 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4486 Assembler::vpmullw(xmm0, xmm0, src, vector_len); 4487 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4488 } 4489 } 4490 4491 void MacroAssembler::vpsubb(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) { 4492 int dst_enc = dst->encoding(); 4493 int nds_enc = nds->encoding(); 4494 int src_enc = src->encoding(); 4495 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4496 Assembler::vpsubb(dst, nds, src, vector_len); 4497 } else if ((dst_enc < 16) && (src_enc < 16)) { 4498 Assembler::vpsubb(dst, dst, src, vector_len); 4499 } else if ((dst_enc < 16) && (nds_enc < 16)) { 4500 // use nds as scratch for src 4501 evmovdqul(nds, src, Assembler::AVX_512bit); 4502 Assembler::vpsubb(dst, dst, nds, vector_len); 4503 } else if ((src_enc < 16) && (nds_enc < 16)) { 4504 // use nds as scratch for dst 4505 evmovdqul(nds, dst, Assembler::AVX_512bit); 4506 Assembler::vpsubb(nds, nds, src, vector_len); 4507 evmovdqul(dst, nds, Assembler::AVX_512bit); 4508 } else if (dst_enc < 16) { 4509 // use nds as scatch for xmm0 to hold src 4510 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4511 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4512 Assembler::vpsubb(dst, dst, xmm0, vector_len); 4513 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4514 } else { 4515 // worse case scenario, all regs are in the upper bank 4516 subptr(rsp, 64); 4517 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4518 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4519 evmovdqul(xmm1, src, Assembler::AVX_512bit); 4520 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4521 Assembler::vpsubb(xmm0, xmm0, xmm1, vector_len); 4522 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4523 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4524 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4525 addptr(rsp, 64); 4526 } 4527 } 4528 4529 void MacroAssembler::vpsubb(XMMRegister dst, XMMRegister nds, Address src, int vector_len) { 4530 int dst_enc = dst->encoding(); 4531 int nds_enc = nds->encoding(); 4532 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4533 Assembler::vpsubb(dst, nds, src, vector_len); 4534 } else if (dst_enc < 16) { 4535 Assembler::vpsubb(dst, dst, src, vector_len); 4536 } else if (nds_enc < 16) { 4537 // implies dst_enc in upper bank with src as scratch 4538 evmovdqul(nds, dst, Assembler::AVX_512bit); 4539 Assembler::vpsubb(nds, nds, src, vector_len); 4540 evmovdqul(dst, nds, Assembler::AVX_512bit); 4541 } else { 4542 // worse case scenario, all regs in upper bank 4543 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4544 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4545 Assembler::vpsubw(xmm0, xmm0, src, vector_len); 4546 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4547 } 4548 } 4549 4550 void MacroAssembler::vpsubw(XMMRegister dst, XMMRegister nds, XMMRegister src, int vector_len) { 4551 int dst_enc = dst->encoding(); 4552 int nds_enc = nds->encoding(); 4553 int src_enc = src->encoding(); 4554 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4555 Assembler::vpsubw(dst, nds, src, vector_len); 4556 } else if ((dst_enc < 16) && (src_enc < 16)) { 4557 Assembler::vpsubw(dst, dst, src, vector_len); 4558 } else if ((dst_enc < 16) && (nds_enc < 16)) { 4559 // use nds as scratch for src 4560 evmovdqul(nds, src, Assembler::AVX_512bit); 4561 Assembler::vpsubw(dst, dst, nds, vector_len); 4562 } else if ((src_enc < 16) && (nds_enc < 16)) { 4563 // use nds as scratch for dst 4564 evmovdqul(nds, dst, Assembler::AVX_512bit); 4565 Assembler::vpsubw(nds, nds, src, vector_len); 4566 evmovdqul(dst, nds, Assembler::AVX_512bit); 4567 } else if (dst_enc < 16) { 4568 // use nds as scatch for xmm0 to hold src 4569 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4570 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4571 Assembler::vpsubw(dst, dst, xmm0, vector_len); 4572 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4573 } else { 4574 // worse case scenario, all regs are in the upper bank 4575 subptr(rsp, 64); 4576 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4577 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4578 evmovdqul(xmm1, src, Assembler::AVX_512bit); 4579 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4580 Assembler::vpsubw(xmm0, xmm0, xmm1, vector_len); 4581 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4582 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4583 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4584 addptr(rsp, 64); 4585 } 4586 } 4587 4588 void MacroAssembler::vpsubw(XMMRegister dst, XMMRegister nds, Address src, int vector_len) { 4589 int dst_enc = dst->encoding(); 4590 int nds_enc = nds->encoding(); 4591 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4592 Assembler::vpsubw(dst, nds, src, vector_len); 4593 } else if (dst_enc < 16) { 4594 Assembler::vpsubw(dst, dst, src, vector_len); 4595 } else if (nds_enc < 16) { 4596 // implies dst_enc in upper bank with src as scratch 4597 evmovdqul(nds, dst, Assembler::AVX_512bit); 4598 Assembler::vpsubw(nds, nds, src, vector_len); 4599 evmovdqul(dst, nds, Assembler::AVX_512bit); 4600 } else { 4601 // worse case scenario, all regs in upper bank 4602 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4603 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4604 Assembler::vpsubw(xmm0, xmm0, src, vector_len); 4605 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4606 } 4607 } 4608 4609 void MacroAssembler::vpsraw(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) { 4610 int dst_enc = dst->encoding(); 4611 int nds_enc = nds->encoding(); 4612 int shift_enc = shift->encoding(); 4613 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4614 Assembler::vpsraw(dst, nds, shift, vector_len); 4615 } else if ((dst_enc < 16) && (shift_enc < 16)) { 4616 Assembler::vpsraw(dst, dst, shift, vector_len); 4617 } else if ((dst_enc < 16) && (nds_enc < 16)) { 4618 // use nds_enc as scratch with shift 4619 evmovdqul(nds, shift, Assembler::AVX_512bit); 4620 Assembler::vpsraw(dst, dst, nds, vector_len); 4621 } else if ((shift_enc < 16) && (nds_enc < 16)) { 4622 // use nds as scratch with dst 4623 evmovdqul(nds, dst, Assembler::AVX_512bit); 4624 Assembler::vpsraw(nds, nds, shift, vector_len); 4625 evmovdqul(dst, nds, Assembler::AVX_512bit); 4626 } else if (dst_enc < 16) { 4627 // use nds to save a copy of xmm0 and hold shift 4628 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4629 evmovdqul(xmm0, shift, Assembler::AVX_512bit); 4630 Assembler::vpsraw(dst, dst, xmm0, vector_len); 4631 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4632 } else if (nds_enc < 16) { 4633 // use nds as dest as temps 4634 evmovdqul(nds, dst, Assembler::AVX_512bit); 4635 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4636 evmovdqul(xmm0, shift, Assembler::AVX_512bit); 4637 Assembler::vpsraw(nds, nds, xmm0, vector_len); 4638 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4639 evmovdqul(dst, nds, Assembler::AVX_512bit); 4640 } else { 4641 // worse case scenario, all regs are in the upper bank 4642 subptr(rsp, 64); 4643 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4644 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4645 evmovdqul(xmm1, shift, Assembler::AVX_512bit); 4646 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4647 Assembler::vpsllw(xmm0, xmm0, xmm1, vector_len); 4648 evmovdqul(xmm1, dst, Assembler::AVX_512bit); 4649 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4650 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4651 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4652 addptr(rsp, 64); 4653 } 4654 } 4655 4656 void MacroAssembler::vpsraw(XMMRegister dst, XMMRegister nds, int shift, int vector_len) { 4657 int dst_enc = dst->encoding(); 4658 int nds_enc = nds->encoding(); 4659 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4660 Assembler::vpsraw(dst, nds, shift, vector_len); 4661 } else if (dst_enc < 16) { 4662 Assembler::vpsraw(dst, dst, shift, vector_len); 4663 } else if (nds_enc < 16) { 4664 // use nds as scratch 4665 evmovdqul(nds, dst, Assembler::AVX_512bit); 4666 Assembler::vpsraw(nds, nds, shift, vector_len); 4667 evmovdqul(dst, nds, Assembler::AVX_512bit); 4668 } else { 4669 // use nds as scratch for xmm0 4670 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4671 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4672 Assembler::vpsraw(xmm0, xmm0, shift, vector_len); 4673 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4674 } 4675 } 4676 4677 void MacroAssembler::vpsrlw(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) { 4678 int dst_enc = dst->encoding(); 4679 int nds_enc = nds->encoding(); 4680 int shift_enc = shift->encoding(); 4681 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4682 Assembler::vpsrlw(dst, nds, shift, vector_len); 4683 } else if ((dst_enc < 16) && (shift_enc < 16)) { 4684 Assembler::vpsrlw(dst, dst, shift, vector_len); 4685 } else if ((dst_enc < 16) && (nds_enc < 16)) { 4686 // use nds_enc as scratch with shift 4687 evmovdqul(nds, shift, Assembler::AVX_512bit); 4688 Assembler::vpsrlw(dst, dst, nds, vector_len); 4689 } else if ((shift_enc < 16) && (nds_enc < 16)) { 4690 // use nds as scratch with dst 4691 evmovdqul(nds, dst, Assembler::AVX_512bit); 4692 Assembler::vpsrlw(nds, nds, shift, vector_len); 4693 evmovdqul(dst, nds, Assembler::AVX_512bit); 4694 } else if (dst_enc < 16) { 4695 // use nds to save a copy of xmm0 and hold shift 4696 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4697 evmovdqul(xmm0, shift, Assembler::AVX_512bit); 4698 Assembler::vpsrlw(dst, dst, xmm0, vector_len); 4699 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4700 } else if (nds_enc < 16) { 4701 // use nds as dest as temps 4702 evmovdqul(nds, dst, Assembler::AVX_512bit); 4703 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4704 evmovdqul(xmm0, shift, Assembler::AVX_512bit); 4705 Assembler::vpsrlw(nds, nds, xmm0, vector_len); 4706 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4707 evmovdqul(dst, nds, Assembler::AVX_512bit); 4708 } else { 4709 // worse case scenario, all regs are in the upper bank 4710 subptr(rsp, 64); 4711 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4712 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4713 evmovdqul(xmm1, shift, Assembler::AVX_512bit); 4714 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4715 Assembler::vpsllw(xmm0, xmm0, xmm1, vector_len); 4716 evmovdqul(xmm1, dst, Assembler::AVX_512bit); 4717 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4718 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4719 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4720 addptr(rsp, 64); 4721 } 4722 } 4723 4724 void MacroAssembler::vpsrlw(XMMRegister dst, XMMRegister nds, int shift, int vector_len) { 4725 int dst_enc = dst->encoding(); 4726 int nds_enc = nds->encoding(); 4727 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4728 Assembler::vpsrlw(dst, nds, shift, vector_len); 4729 } else if (dst_enc < 16) { 4730 Assembler::vpsrlw(dst, dst, shift, vector_len); 4731 } else if (nds_enc < 16) { 4732 // use nds as scratch 4733 evmovdqul(nds, dst, Assembler::AVX_512bit); 4734 Assembler::vpsrlw(nds, nds, shift, vector_len); 4735 evmovdqul(dst, nds, Assembler::AVX_512bit); 4736 } else { 4737 // use nds as scratch for xmm0 4738 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4739 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4740 Assembler::vpsrlw(xmm0, xmm0, shift, vector_len); 4741 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4742 } 4743 } 4744 4745 void MacroAssembler::vpsllw(XMMRegister dst, XMMRegister nds, XMMRegister shift, int vector_len) { 4746 int dst_enc = dst->encoding(); 4747 int nds_enc = nds->encoding(); 4748 int shift_enc = shift->encoding(); 4749 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4750 Assembler::vpsllw(dst, nds, shift, vector_len); 4751 } else if ((dst_enc < 16) && (shift_enc < 16)) { 4752 Assembler::vpsllw(dst, dst, shift, vector_len); 4753 } else if ((dst_enc < 16) && (nds_enc < 16)) { 4754 // use nds_enc as scratch with shift 4755 evmovdqul(nds, shift, Assembler::AVX_512bit); 4756 Assembler::vpsllw(dst, dst, nds, vector_len); 4757 } else if ((shift_enc < 16) && (nds_enc < 16)) { 4758 // use nds as scratch with dst 4759 evmovdqul(nds, dst, Assembler::AVX_512bit); 4760 Assembler::vpsllw(nds, nds, shift, vector_len); 4761 evmovdqul(dst, nds, Assembler::AVX_512bit); 4762 } else if (dst_enc < 16) { 4763 // use nds to save a copy of xmm0 and hold shift 4764 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4765 evmovdqul(xmm0, shift, Assembler::AVX_512bit); 4766 Assembler::vpsllw(dst, dst, xmm0, vector_len); 4767 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4768 } else if (nds_enc < 16) { 4769 // use nds as dest as temps 4770 evmovdqul(nds, dst, Assembler::AVX_512bit); 4771 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4772 evmovdqul(xmm0, shift, Assembler::AVX_512bit); 4773 Assembler::vpsllw(nds, nds, xmm0, vector_len); 4774 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4775 evmovdqul(dst, nds, Assembler::AVX_512bit); 4776 } else { 4777 // worse case scenario, all regs are in the upper bank 4778 subptr(rsp, 64); 4779 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4780 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4781 evmovdqul(xmm1, shift, Assembler::AVX_512bit); 4782 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4783 Assembler::vpsllw(xmm0, xmm0, xmm1, vector_len); 4784 evmovdqul(xmm1, dst, Assembler::AVX_512bit); 4785 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4786 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4787 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4788 addptr(rsp, 64); 4789 } 4790 } 4791 4792 void MacroAssembler::vpsllw(XMMRegister dst, XMMRegister nds, int shift, int vector_len) { 4793 int dst_enc = dst->encoding(); 4794 int nds_enc = nds->encoding(); 4795 if (VM_Version::supports_avxonly() || VM_Version::supports_avx512bw()) { 4796 Assembler::vpsllw(dst, nds, shift, vector_len); 4797 } else if (dst_enc < 16) { 4798 Assembler::vpsllw(dst, dst, shift, vector_len); 4799 } else if (nds_enc < 16) { 4800 // use nds as scratch 4801 evmovdqul(nds, dst, Assembler::AVX_512bit); 4802 Assembler::vpsllw(nds, nds, shift, vector_len); 4803 evmovdqul(dst, nds, Assembler::AVX_512bit); 4804 } else { 4805 // use nds as scratch for xmm0 4806 evmovdqul(nds, xmm0, Assembler::AVX_512bit); 4807 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4808 Assembler::vpsllw(xmm0, xmm0, shift, vector_len); 4809 evmovdqul(xmm0, nds, Assembler::AVX_512bit); 4810 } 4811 } 4812 4813 void MacroAssembler::vptest(XMMRegister dst, XMMRegister src) { 4814 int dst_enc = dst->encoding(); 4815 int src_enc = src->encoding(); 4816 if ((dst_enc < 16) && (src_enc < 16)) { 4817 Assembler::vptest(dst, src); 4818 } else if (src_enc < 16) { 4819 subptr(rsp, 64); 4820 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4821 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4822 Assembler::vptest(xmm0, src); 4823 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4824 addptr(rsp, 64); 4825 } else if (dst_enc < 16) { 4826 subptr(rsp, 64); 4827 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4828 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4829 Assembler::vptest(dst, xmm0); 4830 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4831 addptr(rsp, 64); 4832 } else { 4833 subptr(rsp, 64); 4834 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4835 subptr(rsp, 64); 4836 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4837 movdqu(xmm0, src); 4838 movdqu(xmm1, dst); 4839 Assembler::vptest(xmm1, xmm0); 4840 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4841 addptr(rsp, 64); 4842 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4843 addptr(rsp, 64); 4844 } 4845 } 4846 4847 // This instruction exists within macros, ergo we cannot control its input 4848 // when emitted through those patterns. 4849 void MacroAssembler::punpcklbw(XMMRegister dst, XMMRegister src) { 4850 if (VM_Version::supports_avx512nobw()) { 4851 int dst_enc = dst->encoding(); 4852 int src_enc = src->encoding(); 4853 if (dst_enc == src_enc) { 4854 if (dst_enc < 16) { 4855 Assembler::punpcklbw(dst, src); 4856 } else { 4857 subptr(rsp, 64); 4858 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4859 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4860 Assembler::punpcklbw(xmm0, xmm0); 4861 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4862 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4863 addptr(rsp, 64); 4864 } 4865 } else { 4866 if ((src_enc < 16) && (dst_enc < 16)) { 4867 Assembler::punpcklbw(dst, src); 4868 } else if (src_enc < 16) { 4869 subptr(rsp, 64); 4870 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4871 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4872 Assembler::punpcklbw(xmm0, src); 4873 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4874 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4875 addptr(rsp, 64); 4876 } else if (dst_enc < 16) { 4877 subptr(rsp, 64); 4878 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4879 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4880 Assembler::punpcklbw(dst, xmm0); 4881 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4882 addptr(rsp, 64); 4883 } else { 4884 subptr(rsp, 64); 4885 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4886 subptr(rsp, 64); 4887 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4888 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4889 evmovdqul(xmm1, src, Assembler::AVX_512bit); 4890 Assembler::punpcklbw(xmm0, xmm1); 4891 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4892 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4893 addptr(rsp, 64); 4894 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4895 addptr(rsp, 64); 4896 } 4897 } 4898 } else { 4899 Assembler::punpcklbw(dst, src); 4900 } 4901 } 4902 4903 // This instruction exists within macros, ergo we cannot control its input 4904 // when emitted through those patterns. 4905 void MacroAssembler::pshuflw(XMMRegister dst, XMMRegister src, int mode) { 4906 if (VM_Version::supports_avx512nobw()) { 4907 int dst_enc = dst->encoding(); 4908 int src_enc = src->encoding(); 4909 if (dst_enc == src_enc) { 4910 if (dst_enc < 16) { 4911 Assembler::pshuflw(dst, src, mode); 4912 } else { 4913 subptr(rsp, 64); 4914 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4915 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4916 Assembler::pshuflw(xmm0, xmm0, mode); 4917 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4918 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4919 addptr(rsp, 64); 4920 } 4921 } else { 4922 if ((src_enc < 16) && (dst_enc < 16)) { 4923 Assembler::pshuflw(dst, src, mode); 4924 } else if (src_enc < 16) { 4925 subptr(rsp, 64); 4926 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4927 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4928 Assembler::pshuflw(xmm0, src, mode); 4929 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4930 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4931 addptr(rsp, 64); 4932 } else if (dst_enc < 16) { 4933 subptr(rsp, 64); 4934 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4935 evmovdqul(xmm0, src, Assembler::AVX_512bit); 4936 Assembler::pshuflw(dst, xmm0, mode); 4937 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4938 addptr(rsp, 64); 4939 } else { 4940 subptr(rsp, 64); 4941 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 4942 subptr(rsp, 64); 4943 evmovdqul(Address(rsp, 0), xmm1, Assembler::AVX_512bit); 4944 evmovdqul(xmm0, dst, Assembler::AVX_512bit); 4945 evmovdqul(xmm1, src, Assembler::AVX_512bit); 4946 Assembler::pshuflw(xmm0, xmm1, mode); 4947 evmovdqul(dst, xmm0, Assembler::AVX_512bit); 4948 evmovdqul(xmm1, Address(rsp, 0), Assembler::AVX_512bit); 4949 addptr(rsp, 64); 4950 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 4951 addptr(rsp, 64); 4952 } 4953 } 4954 } else { 4955 Assembler::pshuflw(dst, src, mode); 4956 } 4957 } 4958 4959 void MacroAssembler::vandpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len) { 4960 if (reachable(src)) { 4961 vandpd(dst, nds, as_Address(src), vector_len); 4962 } else { 4963 lea(rscratch1, src); 4964 vandpd(dst, nds, Address(rscratch1, 0), vector_len); 4965 } 4966 } 4967 4968 void MacroAssembler::vandps(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len) { 4969 if (reachable(src)) { 4970 vandps(dst, nds, as_Address(src), vector_len); 4971 } else { 4972 lea(rscratch1, src); 4973 vandps(dst, nds, Address(rscratch1, 0), vector_len); 4974 } 4975 } 4976 4977 void MacroAssembler::vdivsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { 4978 if (reachable(src)) { 4979 vdivsd(dst, nds, as_Address(src)); 4980 } else { 4981 lea(rscratch1, src); 4982 vdivsd(dst, nds, Address(rscratch1, 0)); 4983 } 4984 } 4985 4986 void MacroAssembler::vdivss(XMMRegister dst, XMMRegister nds, AddressLiteral src) { 4987 if (reachable(src)) { 4988 vdivss(dst, nds, as_Address(src)); 4989 } else { 4990 lea(rscratch1, src); 4991 vdivss(dst, nds, Address(rscratch1, 0)); 4992 } 4993 } 4994 4995 void MacroAssembler::vmulsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { 4996 if (reachable(src)) { 4997 vmulsd(dst, nds, as_Address(src)); 4998 } else { 4999 lea(rscratch1, src); 5000 vmulsd(dst, nds, Address(rscratch1, 0)); 5001 } 5002 } 5003 5004 void MacroAssembler::vmulss(XMMRegister dst, XMMRegister nds, AddressLiteral src) { 5005 if (reachable(src)) { 5006 vmulss(dst, nds, as_Address(src)); 5007 } else { 5008 lea(rscratch1, src); 5009 vmulss(dst, nds, Address(rscratch1, 0)); 5010 } 5011 } 5012 5013 void MacroAssembler::vsubsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { 5014 if (reachable(src)) { 5015 vsubsd(dst, nds, as_Address(src)); 5016 } else { 5017 lea(rscratch1, src); 5018 vsubsd(dst, nds, Address(rscratch1, 0)); 5019 } 5020 } 5021 5022 void MacroAssembler::vsubss(XMMRegister dst, XMMRegister nds, AddressLiteral src) { 5023 if (reachable(src)) { 5024 vsubss(dst, nds, as_Address(src)); 5025 } else { 5026 lea(rscratch1, src); 5027 vsubss(dst, nds, Address(rscratch1, 0)); 5028 } 5029 } 5030 5031 void MacroAssembler::vnegatess(XMMRegister dst, XMMRegister nds, AddressLiteral src) { 5032 int nds_enc = nds->encoding(); 5033 int dst_enc = dst->encoding(); 5034 bool dst_upper_bank = (dst_enc > 15); 5035 bool nds_upper_bank = (nds_enc > 15); 5036 if (VM_Version::supports_avx512novl() && 5037 (nds_upper_bank || dst_upper_bank)) { 5038 if (dst_upper_bank) { 5039 subptr(rsp, 64); 5040 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 5041 movflt(xmm0, nds); 5042 vxorps(xmm0, xmm0, src, Assembler::AVX_128bit); 5043 movflt(dst, xmm0); 5044 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 5045 addptr(rsp, 64); 5046 } else { 5047 movflt(dst, nds); 5048 vxorps(dst, dst, src, Assembler::AVX_128bit); 5049 } 5050 } else { 5051 vxorps(dst, nds, src, Assembler::AVX_128bit); 5052 } 5053 } 5054 5055 void MacroAssembler::vnegatesd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { 5056 int nds_enc = nds->encoding(); 5057 int dst_enc = dst->encoding(); 5058 bool dst_upper_bank = (dst_enc > 15); 5059 bool nds_upper_bank = (nds_enc > 15); 5060 if (VM_Version::supports_avx512novl() && 5061 (nds_upper_bank || dst_upper_bank)) { 5062 if (dst_upper_bank) { 5063 subptr(rsp, 64); 5064 evmovdqul(Address(rsp, 0), xmm0, Assembler::AVX_512bit); 5065 movdbl(xmm0, nds); 5066 vxorpd(xmm0, xmm0, src, Assembler::AVX_128bit); 5067 movdbl(dst, xmm0); 5068 evmovdqul(xmm0, Address(rsp, 0), Assembler::AVX_512bit); 5069 addptr(rsp, 64); 5070 } else { 5071 movdbl(dst, nds); 5072 vxorpd(dst, dst, src, Assembler::AVX_128bit); 5073 } 5074 } else { 5075 vxorpd(dst, nds, src, Assembler::AVX_128bit); 5076 } 5077 } 5078 5079 void MacroAssembler::vxorpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len) { 5080 if (reachable(src)) { 5081 vxorpd(dst, nds, as_Address(src), vector_len); 5082 } else { 5083 lea(rscratch1, src); 5084 vxorpd(dst, nds, Address(rscratch1, 0), vector_len); 5085 } 5086 } 5087 5088 void MacroAssembler::vxorps(XMMRegister dst, XMMRegister nds, AddressLiteral src, int vector_len) { 5089 if (reachable(src)) { 5090 vxorps(dst, nds, as_Address(src), vector_len); 5091 } else { 5092 lea(rscratch1, src); 5093 vxorps(dst, nds, Address(rscratch1, 0), vector_len); 5094 } 5095 } 5096 5097 5098 ////////////////////////////////////////////////////////////////////////////////// 5099 #if INCLUDE_ALL_GCS 5100 5101 void MacroAssembler::g1_write_barrier_pre(Register obj, 5102 Register pre_val, 5103 Register thread, 5104 Register tmp, 5105 bool tosca_live, 5106 bool expand_call) { 5107 5108 // If expand_call is true then we expand the call_VM_leaf macro 5109 // directly to skip generating the check by 5110 // InterpreterMacroAssembler::call_VM_leaf_base that checks _last_sp. 5111 5112 #ifdef _LP64 5113 assert(thread == r15_thread, "must be"); 5114 #endif // _LP64 5115 5116 Label done; 5117 Label runtime; 5118 5119 assert(pre_val != noreg, "check this code"); 5120 5121 if (obj != noreg) { 5122 assert_different_registers(obj, pre_val, tmp); 5123 assert(pre_val != rax, "check this code"); 5124 } 5125 5126 Address in_progress(thread, in_bytes(JavaThread::satb_mark_queue_offset() + 5127 SATBMarkQueue::byte_offset_of_active())); 5128 Address index(thread, in_bytes(JavaThread::satb_mark_queue_offset() + 5129 SATBMarkQueue::byte_offset_of_index())); 5130 Address buffer(thread, in_bytes(JavaThread::satb_mark_queue_offset() + 5131 SATBMarkQueue::byte_offset_of_buf())); 5132 5133 5134 // Is marking active? 5135 if (in_bytes(SATBMarkQueue::byte_width_of_active()) == 4) { 5136 cmpl(in_progress, 0); 5137 } else { 5138 assert(in_bytes(SATBMarkQueue::byte_width_of_active()) == 1, "Assumption"); 5139 cmpb(in_progress, 0); 5140 } 5141 jcc(Assembler::equal, done); 5142 5143 // Do we need to load the previous value? 5144 if (obj != noreg) { 5145 load_heap_oop(pre_val, Address(obj, 0)); 5146 } 5147 5148 // Is the previous value null? 5149 cmpptr(pre_val, (int32_t) NULL_WORD); 5150 jcc(Assembler::equal, done); 5151 5152 // Can we store original value in the thread's buffer? 5153 // Is index == 0? 5154 // (The index field is typed as size_t.) 5155 5156 movptr(tmp, index); // tmp := *index_adr 5157 cmpptr(tmp, 0); // tmp == 0? 5158 jcc(Assembler::equal, runtime); // If yes, goto runtime 5159 5160 subptr(tmp, wordSize); // tmp := tmp - wordSize 5161 movptr(index, tmp); // *index_adr := tmp 5162 addptr(tmp, buffer); // tmp := tmp + *buffer_adr 5163 5164 // Record the previous value 5165 movptr(Address(tmp, 0), pre_val); 5166 jmp(done); 5167 5168 bind(runtime); 5169 // save the live input values 5170 if(tosca_live) push(rax); 5171 5172 if (obj != noreg && obj != rax) 5173 push(obj); 5174 5175 if (pre_val != rax) 5176 push(pre_val); 5177 5178 // Calling the runtime using the regular call_VM_leaf mechanism generates 5179 // code (generated by InterpreterMacroAssember::call_VM_leaf_base) 5180 // that checks that the *(ebp+frame::interpreter_frame_last_sp) == NULL. 5181 // 5182 // If we care generating the pre-barrier without a frame (e.g. in the 5183 // intrinsified Reference.get() routine) then ebp might be pointing to 5184 // the caller frame and so this check will most likely fail at runtime. 5185 // 5186 // Expanding the call directly bypasses the generation of the check. 5187 // So when we do not have have a full interpreter frame on the stack 5188 // expand_call should be passed true. 5189 5190 NOT_LP64( push(thread); ) 5191 5192 if (expand_call) { 5193 LP64_ONLY( assert(pre_val != c_rarg1, "smashed arg"); ) 5194 pass_arg1(this, thread); 5195 pass_arg0(this, pre_val); 5196 MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), 2); 5197 } else { 5198 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), pre_val, thread); 5199 } 5200 5201 NOT_LP64( pop(thread); ) 5202 5203 // save the live input values 5204 if (pre_val != rax) 5205 pop(pre_val); 5206 5207 if (obj != noreg && obj != rax) 5208 pop(obj); 5209 5210 if(tosca_live) pop(rax); 5211 5212 bind(done); 5213 } 5214 5215 void MacroAssembler::g1_write_barrier_post(Register store_addr, 5216 Register new_val, 5217 Register thread, 5218 Register tmp, 5219 Register tmp2) { 5220 #ifdef _LP64 5221 assert(thread == r15_thread, "must be"); 5222 #endif // _LP64 5223 5224 Address queue_index(thread, in_bytes(JavaThread::dirty_card_queue_offset() + 5225 DirtyCardQueue::byte_offset_of_index())); 5226 Address buffer(thread, in_bytes(JavaThread::dirty_card_queue_offset() + 5227 DirtyCardQueue::byte_offset_of_buf())); 5228 5229 CardTableModRefBS* ct = 5230 barrier_set_cast<CardTableModRefBS>(Universe::heap()->barrier_set()); 5231 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); 5232 5233 Label done; 5234 Label runtime; 5235 5236 // Does store cross heap regions? 5237 5238 movptr(tmp, store_addr); 5239 xorptr(tmp, new_val); 5240 shrptr(tmp, HeapRegion::LogOfHRGrainBytes); 5241 jcc(Assembler::equal, done); 5242 5243 // crosses regions, storing NULL? 5244 5245 cmpptr(new_val, (int32_t) NULL_WORD); 5246 jcc(Assembler::equal, done); 5247 5248 // storing region crossing non-NULL, is card already dirty? 5249 5250 const Register card_addr = tmp; 5251 const Register cardtable = tmp2; 5252 5253 movptr(card_addr, store_addr); 5254 shrptr(card_addr, CardTableModRefBS::card_shift); 5255 // Do not use ExternalAddress to load 'byte_map_base', since 'byte_map_base' is NOT 5256 // a valid address and therefore is not properly handled by the relocation code. 5257 movptr(cardtable, (intptr_t)ct->byte_map_base); 5258 addptr(card_addr, cardtable); 5259 5260 cmpb(Address(card_addr, 0), (int)G1SATBCardTableModRefBS::g1_young_card_val()); 5261 jcc(Assembler::equal, done); 5262 5263 membar(Assembler::Membar_mask_bits(Assembler::StoreLoad)); 5264 cmpb(Address(card_addr, 0), (int)CardTableModRefBS::dirty_card_val()); 5265 jcc(Assembler::equal, done); 5266 5267 5268 // storing a region crossing, non-NULL oop, card is clean. 5269 // dirty card and log. 5270 5271 movb(Address(card_addr, 0), (int)CardTableModRefBS::dirty_card_val()); 5272 5273 cmpl(queue_index, 0); 5274 jcc(Assembler::equal, runtime); 5275 subl(queue_index, wordSize); 5276 movptr(tmp2, buffer); 5277 #ifdef _LP64 5278 movslq(rscratch1, queue_index); 5279 addq(tmp2, rscratch1); 5280 movq(Address(tmp2, 0), card_addr); 5281 #else 5282 addl(tmp2, queue_index); 5283 movl(Address(tmp2, 0), card_addr); 5284 #endif 5285 jmp(done); 5286 5287 bind(runtime); 5288 // save the live input values 5289 push(store_addr); 5290 push(new_val); 5291 #ifdef _LP64 5292 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_post), card_addr, r15_thread); 5293 #else 5294 push(thread); 5295 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_post), card_addr, thread); 5296 pop(thread); 5297 #endif 5298 pop(new_val); 5299 pop(store_addr); 5300 5301 bind(done); 5302 } 5303 5304 #endif // INCLUDE_ALL_GCS 5305 ////////////////////////////////////////////////////////////////////////////////// 5306 5307 5308 void MacroAssembler::store_check(Register obj, Address dst) { 5309 store_check(obj); 5310 } 5311 5312 void MacroAssembler::store_check(Register obj) { 5313 // Does a store check for the oop in register obj. The content of 5314 // register obj is destroyed afterwards. 5315 BarrierSet* bs = Universe::heap()->barrier_set(); 5316 assert(bs->kind() == BarrierSet::CardTableForRS || 5317 bs->kind() == BarrierSet::CardTableExtension, 5318 "Wrong barrier set kind"); 5319 5320 CardTableModRefBS* ct = barrier_set_cast<CardTableModRefBS>(bs); 5321 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); 5322 5323 shrptr(obj, CardTableModRefBS::card_shift); 5324 5325 Address card_addr; 5326 5327 // The calculation for byte_map_base is as follows: 5328 // byte_map_base = _byte_map - (uintptr_t(low_bound) >> card_shift); 5329 // So this essentially converts an address to a displacement and it will 5330 // never need to be relocated. On 64bit however the value may be too 5331 // large for a 32bit displacement. 5332 intptr_t disp = (intptr_t) ct->byte_map_base; 5333 if (is_simm32(disp)) { 5334 card_addr = Address(noreg, obj, Address::times_1, disp); 5335 } else { 5336 // By doing it as an ExternalAddress 'disp' could be converted to a rip-relative 5337 // displacement and done in a single instruction given favorable mapping and a 5338 // smarter version of as_Address. However, 'ExternalAddress' generates a relocation 5339 // entry and that entry is not properly handled by the relocation code. 5340 AddressLiteral cardtable((address)ct->byte_map_base, relocInfo::none); 5341 Address index(noreg, obj, Address::times_1); 5342 card_addr = as_Address(ArrayAddress(cardtable, index)); 5343 } 5344 5345 int dirty = CardTableModRefBS::dirty_card_val(); 5346 if (UseCondCardMark) { 5347 Label L_already_dirty; 5348 if (UseConcMarkSweepGC) { 5349 membar(Assembler::StoreLoad); 5350 } 5351 cmpb(card_addr, dirty); 5352 jcc(Assembler::equal, L_already_dirty); 5353 movb(card_addr, dirty); 5354 bind(L_already_dirty); 5355 } else { 5356 movb(card_addr, dirty); 5357 } 5358 } 5359 5360 void MacroAssembler::subptr(Register dst, int32_t imm32) { 5361 LP64_ONLY(subq(dst, imm32)) NOT_LP64(subl(dst, imm32)); 5362 } 5363 5364 // Force generation of a 4 byte immediate value even if it fits into 8bit 5365 void MacroAssembler::subptr_imm32(Register dst, int32_t imm32) { 5366 LP64_ONLY(subq_imm32(dst, imm32)) NOT_LP64(subl_imm32(dst, imm32)); 5367 } 5368 5369 void MacroAssembler::subptr(Register dst, Register src) { 5370 LP64_ONLY(subq(dst, src)) NOT_LP64(subl(dst, src)); 5371 } 5372 5373 // C++ bool manipulation 5374 void MacroAssembler::testbool(Register dst) { 5375 if(sizeof(bool) == 1) 5376 testb(dst, 0xff); 5377 else if(sizeof(bool) == 2) { 5378 // testw implementation needed for two byte bools 5379 ShouldNotReachHere(); 5380 } else if(sizeof(bool) == 4) 5381 testl(dst, dst); 5382 else 5383 // unsupported 5384 ShouldNotReachHere(); 5385 } 5386 5387 void MacroAssembler::testptr(Register dst, Register src) { 5388 LP64_ONLY(testq(dst, src)) NOT_LP64(testl(dst, src)); 5389 } 5390 5391 // Defines obj, preserves var_size_in_bytes, okay for t2 == var_size_in_bytes. 5392 void MacroAssembler::tlab_allocate(Register obj, 5393 Register var_size_in_bytes, 5394 int con_size_in_bytes, 5395 Register t1, 5396 Register t2, 5397 Label& slow_case) { 5398 assert_different_registers(obj, t1, t2); 5399 assert_different_registers(obj, var_size_in_bytes, t1); 5400 Register end = t2; 5401 Register thread = NOT_LP64(t1) LP64_ONLY(r15_thread); 5402 5403 verify_tlab(); 5404 5405 NOT_LP64(get_thread(thread)); 5406 5407 movptr(obj, Address(thread, JavaThread::tlab_top_offset())); 5408 if (var_size_in_bytes == noreg) { 5409 lea(end, Address(obj, con_size_in_bytes)); 5410 } else { 5411 lea(end, Address(obj, var_size_in_bytes, Address::times_1)); 5412 } 5413 cmpptr(end, Address(thread, JavaThread::tlab_end_offset())); 5414 jcc(Assembler::above, slow_case); 5415 5416 // update the tlab top pointer 5417 movptr(Address(thread, JavaThread::tlab_top_offset()), end); 5418 5419 // recover var_size_in_bytes if necessary 5420 if (var_size_in_bytes == end) { 5421 subptr(var_size_in_bytes, obj); 5422 } 5423 verify_tlab(); 5424 } 5425 5426 // Preserves rbx, and rdx. 5427 Register MacroAssembler::tlab_refill(Label& retry, 5428 Label& try_eden, 5429 Label& slow_case) { 5430 Register top = rax; 5431 Register t1 = rcx; // object size 5432 Register t2 = rsi; 5433 Register thread_reg = NOT_LP64(rdi) LP64_ONLY(r15_thread); 5434 assert_different_registers(top, thread_reg, t1, t2, /* preserve: */ rbx, rdx); 5435 Label do_refill, discard_tlab; 5436 5437 if (!Universe::heap()->supports_inline_contig_alloc()) { 5438 // No allocation in the shared eden. 5439 jmp(slow_case); 5440 } 5441 5442 NOT_LP64(get_thread(thread_reg)); 5443 5444 movptr(top, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset()))); 5445 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_end_offset()))); 5446 5447 // calculate amount of free space 5448 subptr(t1, top); 5449 shrptr(t1, LogHeapWordSize); 5450 5451 // Retain tlab and allocate object in shared space if 5452 // the amount free in the tlab is too large to discard. 5453 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_refill_waste_limit_offset()))); 5454 jcc(Assembler::lessEqual, discard_tlab); 5455 5456 // Retain 5457 // %%% yuck as movptr... 5458 movptr(t2, (int32_t) ThreadLocalAllocBuffer::refill_waste_limit_increment()); 5459 addptr(Address(thread_reg, in_bytes(JavaThread::tlab_refill_waste_limit_offset())), t2); 5460 if (TLABStats) { 5461 // increment number of slow_allocations 5462 addl(Address(thread_reg, in_bytes(JavaThread::tlab_slow_allocations_offset())), 1); 5463 } 5464 jmp(try_eden); 5465 5466 bind(discard_tlab); 5467 if (TLABStats) { 5468 // increment number of refills 5469 addl(Address(thread_reg, in_bytes(JavaThread::tlab_number_of_refills_offset())), 1); 5470 // accumulate wastage -- t1 is amount free in tlab 5471 addl(Address(thread_reg, in_bytes(JavaThread::tlab_fast_refill_waste_offset())), t1); 5472 } 5473 5474 // if tlab is currently allocated (top or end != null) then 5475 // fill [top, end + alignment_reserve) with array object 5476 testptr(top, top); 5477 jcc(Assembler::zero, do_refill); 5478 5479 // set up the mark word 5480 movptr(Address(top, oopDesc::mark_offset_in_bytes()), (intptr_t)markOopDesc::prototype()->copy_set_hash(0x2)); 5481 // set the length to the remaining space 5482 subptr(t1, typeArrayOopDesc::header_size(T_INT)); 5483 addptr(t1, (int32_t)ThreadLocalAllocBuffer::alignment_reserve()); 5484 shlptr(t1, log2_intptr(HeapWordSize/sizeof(jint))); 5485 movl(Address(top, arrayOopDesc::length_offset_in_bytes()), t1); 5486 // set klass to intArrayKlass 5487 // dubious reloc why not an oop reloc? 5488 movptr(t1, ExternalAddress((address)Universe::intArrayKlassObj_addr())); 5489 // store klass last. concurrent gcs assumes klass length is valid if 5490 // klass field is not null. 5491 store_klass(top, t1); 5492 5493 movptr(t1, top); 5494 subptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_start_offset()))); 5495 incr_allocated_bytes(thread_reg, t1, 0); 5496 5497 // refill the tlab with an eden allocation 5498 bind(do_refill); 5499 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_size_offset()))); 5500 shlptr(t1, LogHeapWordSize); 5501 // allocate new tlab, address returned in top 5502 eden_allocate(top, t1, 0, t2, slow_case); 5503 5504 // Check that t1 was preserved in eden_allocate. 5505 #ifdef ASSERT 5506 if (UseTLAB) { 5507 Label ok; 5508 Register tsize = rsi; 5509 assert_different_registers(tsize, thread_reg, t1); 5510 push(tsize); 5511 movptr(tsize, Address(thread_reg, in_bytes(JavaThread::tlab_size_offset()))); 5512 shlptr(tsize, LogHeapWordSize); 5513 cmpptr(t1, tsize); 5514 jcc(Assembler::equal, ok); 5515 STOP("assert(t1 != tlab size)"); 5516 should_not_reach_here(); 5517 5518 bind(ok); 5519 pop(tsize); 5520 } 5521 #endif 5522 movptr(Address(thread_reg, in_bytes(JavaThread::tlab_start_offset())), top); 5523 movptr(Address(thread_reg, in_bytes(JavaThread::tlab_top_offset())), top); 5524 addptr(top, t1); 5525 subptr(top, (int32_t)ThreadLocalAllocBuffer::alignment_reserve_in_bytes()); 5526 movptr(Address(thread_reg, in_bytes(JavaThread::tlab_end_offset())), top); 5527 5528 if (ZeroTLAB) { 5529 // This is a fast TLAB refill, therefore the GC is not notified of it. 5530 // So compiled code must fill the new TLAB with zeroes. 5531 movptr(top, Address(thread_reg, in_bytes(JavaThread::tlab_start_offset()))); 5532 zero_memory(top, t1, 0, t2); 5533 } 5534 5535 verify_tlab(); 5536 jmp(retry); 5537 5538 return thread_reg; // for use by caller 5539 } 5540 5541 // Preserves the contents of address, destroys the contents length_in_bytes and temp. 5542 void MacroAssembler::zero_memory(Register address, Register length_in_bytes, int offset_in_bytes, Register temp) { 5543 assert(address != length_in_bytes && address != temp && temp != length_in_bytes, "registers must be different"); 5544 assert((offset_in_bytes & (BytesPerWord - 1)) == 0, "offset must be a multiple of BytesPerWord"); 5545 Label done; 5546 5547 testptr(length_in_bytes, length_in_bytes); 5548 jcc(Assembler::zero, done); 5549 5550 // initialize topmost word, divide index by 2, check if odd and test if zero 5551 // note: for the remaining code to work, index must be a multiple of BytesPerWord 5552 #ifdef ASSERT 5553 { 5554 Label L; 5555 testptr(length_in_bytes, BytesPerWord - 1); 5556 jcc(Assembler::zero, L); 5557 stop("length must be a multiple of BytesPerWord"); 5558 bind(L); 5559 } 5560 #endif 5561 Register index = length_in_bytes; 5562 xorptr(temp, temp); // use _zero reg to clear memory (shorter code) 5563 if (UseIncDec) { 5564 shrptr(index, 3); // divide by 8/16 and set carry flag if bit 2 was set 5565 } else { 5566 shrptr(index, 2); // use 2 instructions to avoid partial flag stall 5567 shrptr(index, 1); 5568 } 5569 #ifndef _LP64 5570 // index could have not been a multiple of 8 (i.e., bit 2 was set) 5571 { 5572 Label even; 5573 // note: if index was a multiple of 8, then it cannot 5574 // be 0 now otherwise it must have been 0 before 5575 // => if it is even, we don't need to check for 0 again 5576 jcc(Assembler::carryClear, even); 5577 // clear topmost word (no jump would be needed if conditional assignment worked here) 5578 movptr(Address(address, index, Address::times_8, offset_in_bytes - 0*BytesPerWord), temp); 5579 // index could be 0 now, must check again 5580 jcc(Assembler::zero, done); 5581 bind(even); 5582 } 5583 #endif // !_LP64 5584 // initialize remaining object fields: index is a multiple of 2 now 5585 { 5586 Label loop; 5587 bind(loop); 5588 movptr(Address(address, index, Address::times_8, offset_in_bytes - 1*BytesPerWord), temp); 5589 NOT_LP64(movptr(Address(address, index, Address::times_8, offset_in_bytes - 2*BytesPerWord), temp);) 5590 decrement(index); 5591 jcc(Assembler::notZero, loop); 5592 } 5593 5594 bind(done); 5595 } 5596 5597 void MacroAssembler::incr_allocated_bytes(Register thread, 5598 Register var_size_in_bytes, 5599 int con_size_in_bytes, 5600 Register t1) { 5601 if (!thread->is_valid()) { 5602 #ifdef _LP64 5603 thread = r15_thread; 5604 #else 5605 assert(t1->is_valid(), "need temp reg"); 5606 thread = t1; 5607 get_thread(thread); 5608 #endif 5609 } 5610 5611 #ifdef _LP64 5612 if (var_size_in_bytes->is_valid()) { 5613 addq(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), var_size_in_bytes); 5614 } else { 5615 addq(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), con_size_in_bytes); 5616 } 5617 #else 5618 if (var_size_in_bytes->is_valid()) { 5619 addl(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), var_size_in_bytes); 5620 } else { 5621 addl(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), con_size_in_bytes); 5622 } 5623 adcl(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())+4), 0); 5624 #endif 5625 } 5626 5627 void MacroAssembler::fp_runtime_fallback(address runtime_entry, int nb_args, int num_fpu_regs_in_use) { 5628 pusha(); 5629 5630 // if we are coming from c1, xmm registers may be live 5631 int num_xmm_regs = LP64_ONLY(16) NOT_LP64(8); 5632 if (UseAVX > 2) { 5633 num_xmm_regs = LP64_ONLY(32) NOT_LP64(8); 5634 } 5635 5636 if (UseSSE == 1) { 5637 subptr(rsp, sizeof(jdouble)*8); 5638 for (int n = 0; n < 8; n++) { 5639 movflt(Address(rsp, n*sizeof(jdouble)), as_XMMRegister(n)); 5640 } 5641 } else if (UseSSE >= 2) { 5642 if (UseAVX > 2) { 5643 push(rbx); 5644 movl(rbx, 0xffff); 5645 kmovwl(k1, rbx); 5646 pop(rbx); 5647 } 5648 #ifdef COMPILER2 5649 if (MaxVectorSize > 16) { 5650 if(UseAVX > 2) { 5651 // Save upper half of ZMM registers 5652 subptr(rsp, 32*num_xmm_regs); 5653 for (int n = 0; n < num_xmm_regs; n++) { 5654 vextractf64x4h(Address(rsp, n*32), as_XMMRegister(n), 1); 5655 } 5656 } 5657 assert(UseAVX > 0, "256 bit vectors are supported only with AVX"); 5658 // Save upper half of YMM registers 5659 subptr(rsp, 16*num_xmm_regs); 5660 for (int n = 0; n < num_xmm_regs; n++) { 5661 vextractf128h(Address(rsp, n*16), as_XMMRegister(n)); 5662 } 5663 } 5664 #endif 5665 // Save whole 128bit (16 bytes) XMM registers 5666 subptr(rsp, 16*num_xmm_regs); 5667 #ifdef _LP64 5668 if (VM_Version::supports_evex()) { 5669 for (int n = 0; n < num_xmm_regs; n++) { 5670 vextractf32x4h(Address(rsp, n*16), as_XMMRegister(n), 0); 5671 } 5672 } else { 5673 for (int n = 0; n < num_xmm_regs; n++) { 5674 movdqu(Address(rsp, n*16), as_XMMRegister(n)); 5675 } 5676 } 5677 #else 5678 for (int n = 0; n < num_xmm_regs; n++) { 5679 movdqu(Address(rsp, n*16), as_XMMRegister(n)); 5680 } 5681 #endif 5682 } 5683 5684 // Preserve registers across runtime call 5685 int incoming_argument_and_return_value_offset = -1; 5686 if (num_fpu_regs_in_use > 1) { 5687 // Must preserve all other FPU regs (could alternatively convert 5688 // SharedRuntime::dsin, dcos etc. into assembly routines known not to trash 5689 // FPU state, but can not trust C compiler) 5690 NEEDS_CLEANUP; 5691 // NOTE that in this case we also push the incoming argument(s) to 5692 // the stack and restore it later; we also use this stack slot to 5693 // hold the return value from dsin, dcos etc. 5694 for (int i = 0; i < num_fpu_regs_in_use; i++) { 5695 subptr(rsp, sizeof(jdouble)); 5696 fstp_d(Address(rsp, 0)); 5697 } 5698 incoming_argument_and_return_value_offset = sizeof(jdouble)*(num_fpu_regs_in_use-1); 5699 for (int i = nb_args-1; i >= 0; i--) { 5700 fld_d(Address(rsp, incoming_argument_and_return_value_offset-i*sizeof(jdouble))); 5701 } 5702 } 5703 5704 subptr(rsp, nb_args*sizeof(jdouble)); 5705 for (int i = 0; i < nb_args; i++) { 5706 fstp_d(Address(rsp, i*sizeof(jdouble))); 5707 } 5708 5709 #ifdef _LP64 5710 if (nb_args > 0) { 5711 movdbl(xmm0, Address(rsp, 0)); 5712 } 5713 if (nb_args > 1) { 5714 movdbl(xmm1, Address(rsp, sizeof(jdouble))); 5715 } 5716 assert(nb_args <= 2, "unsupported number of args"); 5717 #endif // _LP64 5718 5719 // NOTE: we must not use call_VM_leaf here because that requires a 5720 // complete interpreter frame in debug mode -- same bug as 4387334 5721 // MacroAssembler::call_VM_leaf_base is perfectly safe and will 5722 // do proper 64bit abi 5723 5724 NEEDS_CLEANUP; 5725 // Need to add stack banging before this runtime call if it needs to 5726 // be taken; however, there is no generic stack banging routine at 5727 // the MacroAssembler level 5728 5729 MacroAssembler::call_VM_leaf_base(runtime_entry, 0); 5730 5731 #ifdef _LP64 5732 movsd(Address(rsp, 0), xmm0); 5733 fld_d(Address(rsp, 0)); 5734 #endif // _LP64 5735 addptr(rsp, sizeof(jdouble)*nb_args); 5736 if (num_fpu_regs_in_use > 1) { 5737 // Must save return value to stack and then restore entire FPU 5738 // stack except incoming arguments 5739 fstp_d(Address(rsp, incoming_argument_and_return_value_offset)); 5740 for (int i = 0; i < num_fpu_regs_in_use - nb_args; i++) { 5741 fld_d(Address(rsp, 0)); 5742 addptr(rsp, sizeof(jdouble)); 5743 } 5744 fld_d(Address(rsp, (nb_args-1)*sizeof(jdouble))); 5745 addptr(rsp, sizeof(jdouble)*nb_args); 5746 } 5747 5748 if (UseSSE == 1) { 5749 for (int n = 0; n < 8; n++) { 5750 movflt(as_XMMRegister(n), Address(rsp, n*sizeof(jdouble))); 5751 } 5752 addptr(rsp, sizeof(jdouble)*8); 5753 } else if (UseSSE >= 2) { 5754 // Restore whole 128bit (16 bytes) XMM registers 5755 #ifdef _LP64 5756 if (VM_Version::supports_evex()) { 5757 for (int n = 0; n < num_xmm_regs; n++) { 5758 vinsertf32x4h(as_XMMRegister(n), Address(rsp, n*16), 0); 5759 } 5760 } else { 5761 for (int n = 0; n < num_xmm_regs; n++) { 5762 movdqu(as_XMMRegister(n), Address(rsp, n*16)); 5763 } 5764 } 5765 #else 5766 for (int n = 0; n < num_xmm_regs; n++) { 5767 movdqu(as_XMMRegister(n), Address(rsp, n*16)); 5768 } 5769 #endif 5770 addptr(rsp, 16*num_xmm_regs); 5771 5772 #ifdef COMPILER2 5773 if (MaxVectorSize > 16) { 5774 // Restore upper half of YMM registers. 5775 for (int n = 0; n < num_xmm_regs; n++) { 5776 vinsertf128h(as_XMMRegister(n), Address(rsp, n*16)); 5777 } 5778 addptr(rsp, 16*num_xmm_regs); 5779 if(UseAVX > 2) { 5780 for (int n = 0; n < num_xmm_regs; n++) { 5781 vinsertf64x4h(as_XMMRegister(n), Address(rsp, n*32), 1); 5782 } 5783 addptr(rsp, 32*num_xmm_regs); 5784 } 5785 } 5786 #endif 5787 } 5788 popa(); 5789 } 5790 5791 static const double pi_4 = 0.7853981633974483; 5792 5793 void MacroAssembler::trigfunc(char trig, int num_fpu_regs_in_use) { 5794 // A hand-coded argument reduction for values in fabs(pi/4, pi/2) 5795 // was attempted in this code; unfortunately it appears that the 5796 // switch to 80-bit precision and back causes this to be 5797 // unprofitable compared with simply performing a runtime call if 5798 // the argument is out of the (-pi/4, pi/4) range. 5799 5800 Register tmp = noreg; 5801 if (!VM_Version::supports_cmov()) { 5802 // fcmp needs a temporary so preserve rbx, 5803 tmp = rbx; 5804 push(tmp); 5805 } 5806 5807 Label slow_case, done; 5808 if (trig == 't') { 5809 ExternalAddress pi4_adr = (address)&pi_4; 5810 if (reachable(pi4_adr)) { 5811 // x ?<= pi/4 5812 fld_d(pi4_adr); 5813 fld_s(1); // Stack: X PI/4 X 5814 fabs(); // Stack: |X| PI/4 X 5815 fcmp(tmp); 5816 jcc(Assembler::above, slow_case); 5817 5818 // fastest case: -pi/4 <= x <= pi/4 5819 ftan(); 5820 5821 jmp(done); 5822 } 5823 } 5824 // slow case: runtime call 5825 bind(slow_case); 5826 5827 switch(trig) { 5828 case 's': 5829 { 5830 fp_runtime_fallback(CAST_FROM_FN_PTR(address, SharedRuntime::dsin), 1, num_fpu_regs_in_use); 5831 } 5832 break; 5833 case 'c': 5834 { 5835 fp_runtime_fallback(CAST_FROM_FN_PTR(address, SharedRuntime::dcos), 1, num_fpu_regs_in_use); 5836 } 5837 break; 5838 case 't': 5839 { 5840 fp_runtime_fallback(CAST_FROM_FN_PTR(address, SharedRuntime::dtan), 1, num_fpu_regs_in_use); 5841 } 5842 break; 5843 default: 5844 assert(false, "bad intrinsic"); 5845 break; 5846 } 5847 5848 // Come here with result in F-TOS 5849 bind(done); 5850 5851 if (tmp != noreg) { 5852 pop(tmp); 5853 } 5854 } 5855 5856 // Look up the method for a megamorphic invokeinterface call. 5857 // The target method is determined by <intf_klass, itable_index>. 5858 // The receiver klass is in recv_klass. 5859 // On success, the result will be in method_result, and execution falls through. 5860 // On failure, execution transfers to the given label. 5861 void MacroAssembler::lookup_interface_method(Register recv_klass, 5862 Register intf_klass, 5863 RegisterOrConstant itable_index, 5864 Register method_result, 5865 Register scan_temp, 5866 Label& L_no_such_interface) { 5867 assert_different_registers(recv_klass, intf_klass, method_result, scan_temp); 5868 assert(itable_index.is_constant() || itable_index.as_register() == method_result, 5869 "caller must use same register for non-constant itable index as for method"); 5870 5871 // Compute start of first itableOffsetEntry (which is at the end of the vtable) 5872 int vtable_base = InstanceKlass::vtable_start_offset() * wordSize; 5873 int itentry_off = itableMethodEntry::method_offset_in_bytes(); 5874 int scan_step = itableOffsetEntry::size() * wordSize; 5875 int vte_size = vtableEntry::size() * wordSize; 5876 Address::ScaleFactor times_vte_scale = Address::times_ptr; 5877 assert(vte_size == wordSize, "else adjust times_vte_scale"); 5878 5879 movl(scan_temp, Address(recv_klass, InstanceKlass::vtable_length_offset() * wordSize)); 5880 5881 // %%% Could store the aligned, prescaled offset in the klassoop. 5882 lea(scan_temp, Address(recv_klass, scan_temp, times_vte_scale, vtable_base)); 5883 if (HeapWordsPerLong > 1) { 5884 // Round up to align_object_offset boundary 5885 // see code for InstanceKlass::start_of_itable! 5886 round_to(scan_temp, BytesPerLong); 5887 } 5888 5889 // Adjust recv_klass by scaled itable_index, so we can free itable_index. 5890 assert(itableMethodEntry::size() * wordSize == wordSize, "adjust the scaling in the code below"); 5891 lea(recv_klass, Address(recv_klass, itable_index, Address::times_ptr, itentry_off)); 5892 5893 // for (scan = klass->itable(); scan->interface() != NULL; scan += scan_step) { 5894 // if (scan->interface() == intf) { 5895 // result = (klass + scan->offset() + itable_index); 5896 // } 5897 // } 5898 Label search, found_method; 5899 5900 for (int peel = 1; peel >= 0; peel--) { 5901 movptr(method_result, Address(scan_temp, itableOffsetEntry::interface_offset_in_bytes())); 5902 cmpptr(intf_klass, method_result); 5903 5904 if (peel) { 5905 jccb(Assembler::equal, found_method); 5906 } else { 5907 jccb(Assembler::notEqual, search); 5908 // (invert the test to fall through to found_method...) 5909 } 5910 5911 if (!peel) break; 5912 5913 bind(search); 5914 5915 // Check that the previous entry is non-null. A null entry means that 5916 // the receiver class doesn't implement the interface, and wasn't the 5917 // same as when the caller was compiled. 5918 testptr(method_result, method_result); 5919 jcc(Assembler::zero, L_no_such_interface); 5920 addptr(scan_temp, scan_step); 5921 } 5922 5923 bind(found_method); 5924 5925 // Got a hit. 5926 movl(scan_temp, Address(scan_temp, itableOffsetEntry::offset_offset_in_bytes())); 5927 movptr(method_result, Address(recv_klass, scan_temp, Address::times_1)); 5928 } 5929 5930 5931 // virtual method calling 5932 void MacroAssembler::lookup_virtual_method(Register recv_klass, 5933 RegisterOrConstant vtable_index, 5934 Register method_result) { 5935 const int base = InstanceKlass::vtable_start_offset() * wordSize; 5936 assert(vtableEntry::size() * wordSize == wordSize, "else adjust the scaling in the code below"); 5937 Address vtable_entry_addr(recv_klass, 5938 vtable_index, Address::times_ptr, 5939 base + vtableEntry::method_offset_in_bytes()); 5940 movptr(method_result, vtable_entry_addr); 5941 } 5942 5943 5944 void MacroAssembler::check_klass_subtype(Register sub_klass, 5945 Register super_klass, 5946 Register temp_reg, 5947 Label& L_success) { 5948 Label L_failure; 5949 check_klass_subtype_fast_path(sub_klass, super_klass, temp_reg, &L_success, &L_failure, NULL); 5950 check_klass_subtype_slow_path(sub_klass, super_klass, temp_reg, noreg, &L_success, NULL); 5951 bind(L_failure); 5952 } 5953 5954 5955 void MacroAssembler::check_klass_subtype_fast_path(Register sub_klass, 5956 Register super_klass, 5957 Register temp_reg, 5958 Label* L_success, 5959 Label* L_failure, 5960 Label* L_slow_path, 5961 RegisterOrConstant super_check_offset) { 5962 assert_different_registers(sub_klass, super_klass, temp_reg); 5963 bool must_load_sco = (super_check_offset.constant_or_zero() == -1); 5964 if (super_check_offset.is_register()) { 5965 assert_different_registers(sub_klass, super_klass, 5966 super_check_offset.as_register()); 5967 } else if (must_load_sco) { 5968 assert(temp_reg != noreg, "supply either a temp or a register offset"); 5969 } 5970 5971 Label L_fallthrough; 5972 int label_nulls = 0; 5973 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; } 5974 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; } 5975 if (L_slow_path == NULL) { L_slow_path = &L_fallthrough; label_nulls++; } 5976 assert(label_nulls <= 1, "at most one NULL in the batch"); 5977 5978 int sc_offset = in_bytes(Klass::secondary_super_cache_offset()); 5979 int sco_offset = in_bytes(Klass::super_check_offset_offset()); 5980 Address super_check_offset_addr(super_klass, sco_offset); 5981 5982 // Hacked jcc, which "knows" that L_fallthrough, at least, is in 5983 // range of a jccb. If this routine grows larger, reconsider at 5984 // least some of these. 5985 #define local_jcc(assembler_cond, label) \ 5986 if (&(label) == &L_fallthrough) jccb(assembler_cond, label); \ 5987 else jcc( assembler_cond, label) /*omit semi*/ 5988 5989 // Hacked jmp, which may only be used just before L_fallthrough. 5990 #define final_jmp(label) \ 5991 if (&(label) == &L_fallthrough) { /*do nothing*/ } \ 5992 else jmp(label) /*omit semi*/ 5993 5994 // If the pointers are equal, we are done (e.g., String[] elements). 5995 // This self-check enables sharing of secondary supertype arrays among 5996 // non-primary types such as array-of-interface. Otherwise, each such 5997 // type would need its own customized SSA. 5998 // We move this check to the front of the fast path because many 5999 // type checks are in fact trivially successful in this manner, 6000 // so we get a nicely predicted branch right at the start of the check. 6001 cmpptr(sub_klass, super_klass); 6002 local_jcc(Assembler::equal, *L_success); 6003 6004 // Check the supertype display: 6005 if (must_load_sco) { 6006 // Positive movl does right thing on LP64. 6007 movl(temp_reg, super_check_offset_addr); 6008 super_check_offset = RegisterOrConstant(temp_reg); 6009 } 6010 Address super_check_addr(sub_klass, super_check_offset, Address::times_1, 0); 6011 cmpptr(super_klass, super_check_addr); // load displayed supertype 6012 6013 // This check has worked decisively for primary supers. 6014 // Secondary supers are sought in the super_cache ('super_cache_addr'). 6015 // (Secondary supers are interfaces and very deeply nested subtypes.) 6016 // This works in the same check above because of a tricky aliasing 6017 // between the super_cache and the primary super display elements. 6018 // (The 'super_check_addr' can address either, as the case requires.) 6019 // Note that the cache is updated below if it does not help us find 6020 // what we need immediately. 6021 // So if it was a primary super, we can just fail immediately. 6022 // Otherwise, it's the slow path for us (no success at this point). 6023 6024 if (super_check_offset.is_register()) { 6025 local_jcc(Assembler::equal, *L_success); 6026 cmpl(super_check_offset.as_register(), sc_offset); 6027 if (L_failure == &L_fallthrough) { 6028 local_jcc(Assembler::equal, *L_slow_path); 6029 } else { 6030 local_jcc(Assembler::notEqual, *L_failure); 6031 final_jmp(*L_slow_path); 6032 } 6033 } else if (super_check_offset.as_constant() == sc_offset) { 6034 // Need a slow path; fast failure is impossible. 6035 if (L_slow_path == &L_fallthrough) { 6036 local_jcc(Assembler::equal, *L_success); 6037 } else { 6038 local_jcc(Assembler::notEqual, *L_slow_path); 6039 final_jmp(*L_success); 6040 } 6041 } else { 6042 // No slow path; it's a fast decision. 6043 if (L_failure == &L_fallthrough) { 6044 local_jcc(Assembler::equal, *L_success); 6045 } else { 6046 local_jcc(Assembler::notEqual, *L_failure); 6047 final_jmp(*L_success); 6048 } 6049 } 6050 6051 bind(L_fallthrough); 6052 6053 #undef local_jcc 6054 #undef final_jmp 6055 } 6056 6057 6058 void MacroAssembler::check_klass_subtype_slow_path(Register sub_klass, 6059 Register super_klass, 6060 Register temp_reg, 6061 Register temp2_reg, 6062 Label* L_success, 6063 Label* L_failure, 6064 bool set_cond_codes) { 6065 assert_different_registers(sub_klass, super_klass, temp_reg); 6066 if (temp2_reg != noreg) 6067 assert_different_registers(sub_klass, super_klass, temp_reg, temp2_reg); 6068 #define IS_A_TEMP(reg) ((reg) == temp_reg || (reg) == temp2_reg) 6069 6070 Label L_fallthrough; 6071 int label_nulls = 0; 6072 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; } 6073 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; } 6074 assert(label_nulls <= 1, "at most one NULL in the batch"); 6075 6076 // a couple of useful fields in sub_klass: 6077 int ss_offset = in_bytes(Klass::secondary_supers_offset()); 6078 int sc_offset = in_bytes(Klass::secondary_super_cache_offset()); 6079 Address secondary_supers_addr(sub_klass, ss_offset); 6080 Address super_cache_addr( sub_klass, sc_offset); 6081 6082 // Do a linear scan of the secondary super-klass chain. 6083 // This code is rarely used, so simplicity is a virtue here. 6084 // The repne_scan instruction uses fixed registers, which we must spill. 6085 // Don't worry too much about pre-existing connections with the input regs. 6086 6087 assert(sub_klass != rax, "killed reg"); // killed by mov(rax, super) 6088 assert(sub_klass != rcx, "killed reg"); // killed by lea(rcx, &pst_counter) 6089 6090 // Get super_klass value into rax (even if it was in rdi or rcx). 6091 bool pushed_rax = false, pushed_rcx = false, pushed_rdi = false; 6092 if (super_klass != rax || UseCompressedOops) { 6093 if (!IS_A_TEMP(rax)) { push(rax); pushed_rax = true; } 6094 mov(rax, super_klass); 6095 } 6096 if (!IS_A_TEMP(rcx)) { push(rcx); pushed_rcx = true; } 6097 if (!IS_A_TEMP(rdi)) { push(rdi); pushed_rdi = true; } 6098 6099 #ifndef PRODUCT 6100 int* pst_counter = &SharedRuntime::_partial_subtype_ctr; 6101 ExternalAddress pst_counter_addr((address) pst_counter); 6102 NOT_LP64( incrementl(pst_counter_addr) ); 6103 LP64_ONLY( lea(rcx, pst_counter_addr) ); 6104 LP64_ONLY( incrementl(Address(rcx, 0)) ); 6105 #endif //PRODUCT 6106 6107 // We will consult the secondary-super array. 6108 movptr(rdi, secondary_supers_addr); 6109 // Load the array length. (Positive movl does right thing on LP64.) 6110 movl(rcx, Address(rdi, Array<Klass*>::length_offset_in_bytes())); 6111 // Skip to start of data. 6112 addptr(rdi, Array<Klass*>::base_offset_in_bytes()); 6113 6114 // Scan RCX words at [RDI] for an occurrence of RAX. 6115 // Set NZ/Z based on last compare. 6116 // Z flag value will not be set by 'repne' if RCX == 0 since 'repne' does 6117 // not change flags (only scas instruction which is repeated sets flags). 6118 // Set Z = 0 (not equal) before 'repne' to indicate that class was not found. 6119 6120 testptr(rax,rax); // Set Z = 0 6121 repne_scan(); 6122 6123 // Unspill the temp. registers: 6124 if (pushed_rdi) pop(rdi); 6125 if (pushed_rcx) pop(rcx); 6126 if (pushed_rax) pop(rax); 6127 6128 if (set_cond_codes) { 6129 // Special hack for the AD files: rdi is guaranteed non-zero. 6130 assert(!pushed_rdi, "rdi must be left non-NULL"); 6131 // Also, the condition codes are properly set Z/NZ on succeed/failure. 6132 } 6133 6134 if (L_failure == &L_fallthrough) 6135 jccb(Assembler::notEqual, *L_failure); 6136 else jcc(Assembler::notEqual, *L_failure); 6137 6138 // Success. Cache the super we found and proceed in triumph. 6139 movptr(super_cache_addr, super_klass); 6140 6141 if (L_success != &L_fallthrough) { 6142 jmp(*L_success); 6143 } 6144 6145 #undef IS_A_TEMP 6146 6147 bind(L_fallthrough); 6148 } 6149 6150 6151 void MacroAssembler::cmov32(Condition cc, Register dst, Address src) { 6152 if (VM_Version::supports_cmov()) { 6153 cmovl(cc, dst, src); 6154 } else { 6155 Label L; 6156 jccb(negate_condition(cc), L); 6157 movl(dst, src); 6158 bind(L); 6159 } 6160 } 6161 6162 void MacroAssembler::cmov32(Condition cc, Register dst, Register src) { 6163 if (VM_Version::supports_cmov()) { 6164 cmovl(cc, dst, src); 6165 } else { 6166 Label L; 6167 jccb(negate_condition(cc), L); 6168 movl(dst, src); 6169 bind(L); 6170 } 6171 } 6172 6173 void MacroAssembler::verify_oop(Register reg, const char* s) { 6174 if (!VerifyOops) return; 6175 6176 // Pass register number to verify_oop_subroutine 6177 const char* b = NULL; 6178 { 6179 ResourceMark rm; 6180 stringStream ss; 6181 ss.print("verify_oop: %s: %s", reg->name(), s); 6182 b = code_string(ss.as_string()); 6183 } 6184 BLOCK_COMMENT("verify_oop {"); 6185 #ifdef _LP64 6186 push(rscratch1); // save r10, trashed by movptr() 6187 #endif 6188 push(rax); // save rax, 6189 push(reg); // pass register argument 6190 ExternalAddress buffer((address) b); 6191 // avoid using pushptr, as it modifies scratch registers 6192 // and our contract is not to modify anything 6193 movptr(rax, buffer.addr()); 6194 push(rax); 6195 // call indirectly to solve generation ordering problem 6196 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address())); 6197 call(rax); 6198 // Caller pops the arguments (oop, message) and restores rax, r10 6199 BLOCK_COMMENT("} verify_oop"); 6200 } 6201 6202 6203 RegisterOrConstant MacroAssembler::delayed_value_impl(intptr_t* delayed_value_addr, 6204 Register tmp, 6205 int offset) { 6206 intptr_t value = *delayed_value_addr; 6207 if (value != 0) 6208 return RegisterOrConstant(value + offset); 6209 6210 // load indirectly to solve generation ordering problem 6211 movptr(tmp, ExternalAddress((address) delayed_value_addr)); 6212 6213 #ifdef ASSERT 6214 { Label L; 6215 testptr(tmp, tmp); 6216 if (WizardMode) { 6217 const char* buf = NULL; 6218 { 6219 ResourceMark rm; 6220 stringStream ss; 6221 ss.print("DelayedValue=" INTPTR_FORMAT, delayed_value_addr[1]); 6222 buf = code_string(ss.as_string()); 6223 } 6224 jcc(Assembler::notZero, L); 6225 STOP(buf); 6226 } else { 6227 jccb(Assembler::notZero, L); 6228 hlt(); 6229 } 6230 bind(L); 6231 } 6232 #endif 6233 6234 if (offset != 0) 6235 addptr(tmp, offset); 6236 6237 return RegisterOrConstant(tmp); 6238 } 6239 6240 6241 Address MacroAssembler::argument_address(RegisterOrConstant arg_slot, 6242 int extra_slot_offset) { 6243 // cf. TemplateTable::prepare_invoke(), if (load_receiver). 6244 int stackElementSize = Interpreter::stackElementSize; 6245 int offset = Interpreter::expr_offset_in_bytes(extra_slot_offset+0); 6246 #ifdef ASSERT 6247 int offset1 = Interpreter::expr_offset_in_bytes(extra_slot_offset+1); 6248 assert(offset1 - offset == stackElementSize, "correct arithmetic"); 6249 #endif 6250 Register scale_reg = noreg; 6251 Address::ScaleFactor scale_factor = Address::no_scale; 6252 if (arg_slot.is_constant()) { 6253 offset += arg_slot.as_constant() * stackElementSize; 6254 } else { 6255 scale_reg = arg_slot.as_register(); 6256 scale_factor = Address::times(stackElementSize); 6257 } 6258 offset += wordSize; // return PC is on stack 6259 return Address(rsp, scale_reg, scale_factor, offset); 6260 } 6261 6262 6263 void MacroAssembler::verify_oop_addr(Address addr, const char* s) { 6264 if (!VerifyOops) return; 6265 6266 // Address adjust(addr.base(), addr.index(), addr.scale(), addr.disp() + BytesPerWord); 6267 // Pass register number to verify_oop_subroutine 6268 const char* b = NULL; 6269 { 6270 ResourceMark rm; 6271 stringStream ss; 6272 ss.print("verify_oop_addr: %s", s); 6273 b = code_string(ss.as_string()); 6274 } 6275 #ifdef _LP64 6276 push(rscratch1); // save r10, trashed by movptr() 6277 #endif 6278 push(rax); // save rax, 6279 // addr may contain rsp so we will have to adjust it based on the push 6280 // we just did (and on 64 bit we do two pushes) 6281 // NOTE: 64bit seemed to have had a bug in that it did movq(addr, rax); which 6282 // stores rax into addr which is backwards of what was intended. 6283 if (addr.uses(rsp)) { 6284 lea(rax, addr); 6285 pushptr(Address(rax, LP64_ONLY(2 *) BytesPerWord)); 6286 } else { 6287 pushptr(addr); 6288 } 6289 6290 ExternalAddress buffer((address) b); 6291 // pass msg argument 6292 // avoid using pushptr, as it modifies scratch registers 6293 // and our contract is not to modify anything 6294 movptr(rax, buffer.addr()); 6295 push(rax); 6296 6297 // call indirectly to solve generation ordering problem 6298 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address())); 6299 call(rax); 6300 // Caller pops the arguments (addr, message) and restores rax, r10. 6301 } 6302 6303 void MacroAssembler::verify_tlab() { 6304 #ifdef ASSERT 6305 if (UseTLAB && VerifyOops) { 6306 Label next, ok; 6307 Register t1 = rsi; 6308 Register thread_reg = NOT_LP64(rbx) LP64_ONLY(r15_thread); 6309 6310 push(t1); 6311 NOT_LP64(push(thread_reg)); 6312 NOT_LP64(get_thread(thread_reg)); 6313 6314 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset()))); 6315 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_start_offset()))); 6316 jcc(Assembler::aboveEqual, next); 6317 STOP("assert(top >= start)"); 6318 should_not_reach_here(); 6319 6320 bind(next); 6321 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_end_offset()))); 6322 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset()))); 6323 jcc(Assembler::aboveEqual, ok); 6324 STOP("assert(top <= end)"); 6325 should_not_reach_here(); 6326 6327 bind(ok); 6328 NOT_LP64(pop(thread_reg)); 6329 pop(t1); 6330 } 6331 #endif 6332 } 6333 6334 class ControlWord { 6335 public: 6336 int32_t _value; 6337 6338 int rounding_control() const { return (_value >> 10) & 3 ; } 6339 int precision_control() const { return (_value >> 8) & 3 ; } 6340 bool precision() const { return ((_value >> 5) & 1) != 0; } 6341 bool underflow() const { return ((_value >> 4) & 1) != 0; } 6342 bool overflow() const { return ((_value >> 3) & 1) != 0; } 6343 bool zero_divide() const { return ((_value >> 2) & 1) != 0; } 6344 bool denormalized() const { return ((_value >> 1) & 1) != 0; } 6345 bool invalid() const { return ((_value >> 0) & 1) != 0; } 6346 6347 void print() const { 6348 // rounding control 6349 const char* rc; 6350 switch (rounding_control()) { 6351 case 0: rc = "round near"; break; 6352 case 1: rc = "round down"; break; 6353 case 2: rc = "round up "; break; 6354 case 3: rc = "chop "; break; 6355 }; 6356 // precision control 6357 const char* pc; 6358 switch (precision_control()) { 6359 case 0: pc = "24 bits "; break; 6360 case 1: pc = "reserved"; break; 6361 case 2: pc = "53 bits "; break; 6362 case 3: pc = "64 bits "; break; 6363 }; 6364 // flags 6365 char f[9]; 6366 f[0] = ' '; 6367 f[1] = ' '; 6368 f[2] = (precision ()) ? 'P' : 'p'; 6369 f[3] = (underflow ()) ? 'U' : 'u'; 6370 f[4] = (overflow ()) ? 'O' : 'o'; 6371 f[5] = (zero_divide ()) ? 'Z' : 'z'; 6372 f[6] = (denormalized()) ? 'D' : 'd'; 6373 f[7] = (invalid ()) ? 'I' : 'i'; 6374 f[8] = '\x0'; 6375 // output 6376 printf("%04x masks = %s, %s, %s", _value & 0xFFFF, f, rc, pc); 6377 } 6378 6379 }; 6380 6381 class StatusWord { 6382 public: 6383 int32_t _value; 6384 6385 bool busy() const { return ((_value >> 15) & 1) != 0; } 6386 bool C3() const { return ((_value >> 14) & 1) != 0; } 6387 bool C2() const { return ((_value >> 10) & 1) != 0; } 6388 bool C1() const { return ((_value >> 9) & 1) != 0; } 6389 bool C0() const { return ((_value >> 8) & 1) != 0; } 6390 int top() const { return (_value >> 11) & 7 ; } 6391 bool error_status() const { return ((_value >> 7) & 1) != 0; } 6392 bool stack_fault() const { return ((_value >> 6) & 1) != 0; } 6393 bool precision() const { return ((_value >> 5) & 1) != 0; } 6394 bool underflow() const { return ((_value >> 4) & 1) != 0; } 6395 bool overflow() const { return ((_value >> 3) & 1) != 0; } 6396 bool zero_divide() const { return ((_value >> 2) & 1) != 0; } 6397 bool denormalized() const { return ((_value >> 1) & 1) != 0; } 6398 bool invalid() const { return ((_value >> 0) & 1) != 0; } 6399 6400 void print() const { 6401 // condition codes 6402 char c[5]; 6403 c[0] = (C3()) ? '3' : '-'; 6404 c[1] = (C2()) ? '2' : '-'; 6405 c[2] = (C1()) ? '1' : '-'; 6406 c[3] = (C0()) ? '0' : '-'; 6407 c[4] = '\x0'; 6408 // flags 6409 char f[9]; 6410 f[0] = (error_status()) ? 'E' : '-'; 6411 f[1] = (stack_fault ()) ? 'S' : '-'; 6412 f[2] = (precision ()) ? 'P' : '-'; 6413 f[3] = (underflow ()) ? 'U' : '-'; 6414 f[4] = (overflow ()) ? 'O' : '-'; 6415 f[5] = (zero_divide ()) ? 'Z' : '-'; 6416 f[6] = (denormalized()) ? 'D' : '-'; 6417 f[7] = (invalid ()) ? 'I' : '-'; 6418 f[8] = '\x0'; 6419 // output 6420 printf("%04x flags = %s, cc = %s, top = %d", _value & 0xFFFF, f, c, top()); 6421 } 6422 6423 }; 6424 6425 class TagWord { 6426 public: 6427 int32_t _value; 6428 6429 int tag_at(int i) const { return (_value >> (i*2)) & 3; } 6430 6431 void print() const { 6432 printf("%04x", _value & 0xFFFF); 6433 } 6434 6435 }; 6436 6437 class FPU_Register { 6438 public: 6439 int32_t _m0; 6440 int32_t _m1; 6441 int16_t _ex; 6442 6443 bool is_indefinite() const { 6444 return _ex == -1 && _m1 == (int32_t)0xC0000000 && _m0 == 0; 6445 } 6446 6447 void print() const { 6448 char sign = (_ex < 0) ? '-' : '+'; 6449 const char* kind = (_ex == 0x7FFF || _ex == (int16_t)-1) ? "NaN" : " "; 6450 printf("%c%04hx.%08x%08x %s", sign, _ex, _m1, _m0, kind); 6451 }; 6452 6453 }; 6454 6455 class FPU_State { 6456 public: 6457 enum { 6458 register_size = 10, 6459 number_of_registers = 8, 6460 register_mask = 7 6461 }; 6462 6463 ControlWord _control_word; 6464 StatusWord _status_word; 6465 TagWord _tag_word; 6466 int32_t _error_offset; 6467 int32_t _error_selector; 6468 int32_t _data_offset; 6469 int32_t _data_selector; 6470 int8_t _register[register_size * number_of_registers]; 6471 6472 int tag_for_st(int i) const { return _tag_word.tag_at((_status_word.top() + i) & register_mask); } 6473 FPU_Register* st(int i) const { return (FPU_Register*)&_register[register_size * i]; } 6474 6475 const char* tag_as_string(int tag) const { 6476 switch (tag) { 6477 case 0: return "valid"; 6478 case 1: return "zero"; 6479 case 2: return "special"; 6480 case 3: return "empty"; 6481 } 6482 ShouldNotReachHere(); 6483 return NULL; 6484 } 6485 6486 void print() const { 6487 // print computation registers 6488 { int t = _status_word.top(); 6489 for (int i = 0; i < number_of_registers; i++) { 6490 int j = (i - t) & register_mask; 6491 printf("%c r%d = ST%d = ", (j == 0 ? '*' : ' '), i, j); 6492 st(j)->print(); 6493 printf(" %s\n", tag_as_string(_tag_word.tag_at(i))); 6494 } 6495 } 6496 printf("\n"); 6497 // print control registers 6498 printf("ctrl = "); _control_word.print(); printf("\n"); 6499 printf("stat = "); _status_word .print(); printf("\n"); 6500 printf("tags = "); _tag_word .print(); printf("\n"); 6501 } 6502 6503 }; 6504 6505 class Flag_Register { 6506 public: 6507 int32_t _value; 6508 6509 bool overflow() const { return ((_value >> 11) & 1) != 0; } 6510 bool direction() const { return ((_value >> 10) & 1) != 0; } 6511 bool sign() const { return ((_value >> 7) & 1) != 0; } 6512 bool zero() const { return ((_value >> 6) & 1) != 0; } 6513 bool auxiliary_carry() const { return ((_value >> 4) & 1) != 0; } 6514 bool parity() const { return ((_value >> 2) & 1) != 0; } 6515 bool carry() const { return ((_value >> 0) & 1) != 0; } 6516 6517 void print() const { 6518 // flags 6519 char f[8]; 6520 f[0] = (overflow ()) ? 'O' : '-'; 6521 f[1] = (direction ()) ? 'D' : '-'; 6522 f[2] = (sign ()) ? 'S' : '-'; 6523 f[3] = (zero ()) ? 'Z' : '-'; 6524 f[4] = (auxiliary_carry()) ? 'A' : '-'; 6525 f[5] = (parity ()) ? 'P' : '-'; 6526 f[6] = (carry ()) ? 'C' : '-'; 6527 f[7] = '\x0'; 6528 // output 6529 printf("%08x flags = %s", _value, f); 6530 } 6531 6532 }; 6533 6534 class IU_Register { 6535 public: 6536 int32_t _value; 6537 6538 void print() const { 6539 printf("%08x %11d", _value, _value); 6540 } 6541 6542 }; 6543 6544 class IU_State { 6545 public: 6546 Flag_Register _eflags; 6547 IU_Register _rdi; 6548 IU_Register _rsi; 6549 IU_Register _rbp; 6550 IU_Register _rsp; 6551 IU_Register _rbx; 6552 IU_Register _rdx; 6553 IU_Register _rcx; 6554 IU_Register _rax; 6555 6556 void print() const { 6557 // computation registers 6558 printf("rax, = "); _rax.print(); printf("\n"); 6559 printf("rbx, = "); _rbx.print(); printf("\n"); 6560 printf("rcx = "); _rcx.print(); printf("\n"); 6561 printf("rdx = "); _rdx.print(); printf("\n"); 6562 printf("rdi = "); _rdi.print(); printf("\n"); 6563 printf("rsi = "); _rsi.print(); printf("\n"); 6564 printf("rbp, = "); _rbp.print(); printf("\n"); 6565 printf("rsp = "); _rsp.print(); printf("\n"); 6566 printf("\n"); 6567 // control registers 6568 printf("flgs = "); _eflags.print(); printf("\n"); 6569 } 6570 }; 6571 6572 6573 class CPU_State { 6574 public: 6575 FPU_State _fpu_state; 6576 IU_State _iu_state; 6577 6578 void print() const { 6579 printf("--------------------------------------------------\n"); 6580 _iu_state .print(); 6581 printf("\n"); 6582 _fpu_state.print(); 6583 printf("--------------------------------------------------\n"); 6584 } 6585 6586 }; 6587 6588 6589 static void _print_CPU_state(CPU_State* state) { 6590 state->print(); 6591 }; 6592 6593 6594 void MacroAssembler::print_CPU_state() { 6595 push_CPU_state(); 6596 push(rsp); // pass CPU state 6597 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _print_CPU_state))); 6598 addptr(rsp, wordSize); // discard argument 6599 pop_CPU_state(); 6600 } 6601 6602 6603 static bool _verify_FPU(int stack_depth, char* s, CPU_State* state) { 6604 static int counter = 0; 6605 FPU_State* fs = &state->_fpu_state; 6606 counter++; 6607 // For leaf calls, only verify that the top few elements remain empty. 6608 // We only need 1 empty at the top for C2 code. 6609 if( stack_depth < 0 ) { 6610 if( fs->tag_for_st(7) != 3 ) { 6611 printf("FPR7 not empty\n"); 6612 state->print(); 6613 assert(false, "error"); 6614 return false; 6615 } 6616 return true; // All other stack states do not matter 6617 } 6618 6619 assert((fs->_control_word._value & 0xffff) == StubRoutines::_fpu_cntrl_wrd_std, 6620 "bad FPU control word"); 6621 6622 // compute stack depth 6623 int i = 0; 6624 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) < 3) i++; 6625 int d = i; 6626 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) == 3) i++; 6627 // verify findings 6628 if (i != FPU_State::number_of_registers) { 6629 // stack not contiguous 6630 printf("%s: stack not contiguous at ST%d\n", s, i); 6631 state->print(); 6632 assert(false, "error"); 6633 return false; 6634 } 6635 // check if computed stack depth corresponds to expected stack depth 6636 if (stack_depth < 0) { 6637 // expected stack depth is -stack_depth or less 6638 if (d > -stack_depth) { 6639 // too many elements on the stack 6640 printf("%s: <= %d stack elements expected but found %d\n", s, -stack_depth, d); 6641 state->print(); 6642 assert(false, "error"); 6643 return false; 6644 } 6645 } else { 6646 // expected stack depth is stack_depth 6647 if (d != stack_depth) { 6648 // wrong stack depth 6649 printf("%s: %d stack elements expected but found %d\n", s, stack_depth, d); 6650 state->print(); 6651 assert(false, "error"); 6652 return false; 6653 } 6654 } 6655 // everything is cool 6656 return true; 6657 } 6658 6659 6660 void MacroAssembler::verify_FPU(int stack_depth, const char* s) { 6661 if (!VerifyFPU) return; 6662 push_CPU_state(); 6663 push(rsp); // pass CPU state 6664 ExternalAddress msg((address) s); 6665 // pass message string s 6666 pushptr(msg.addr()); 6667 push(stack_depth); // pass stack depth 6668 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _verify_FPU))); 6669 addptr(rsp, 3 * wordSize); // discard arguments 6670 // check for error 6671 { Label L; 6672 testl(rax, rax); 6673 jcc(Assembler::notZero, L); 6674 int3(); // break if error condition 6675 bind(L); 6676 } 6677 pop_CPU_state(); 6678 } 6679 6680 void MacroAssembler::restore_cpu_control_state_after_jni() { 6681 // Either restore the MXCSR register after returning from the JNI Call 6682 // or verify that it wasn't changed (with -Xcheck:jni flag). 6683 if (VM_Version::supports_sse()) { 6684 if (RestoreMXCSROnJNICalls) { 6685 ldmxcsr(ExternalAddress(StubRoutines::addr_mxcsr_std())); 6686 } else if (CheckJNICalls) { 6687 call(RuntimeAddress(StubRoutines::x86::verify_mxcsr_entry())); 6688 } 6689 } 6690 if (VM_Version::supports_avx()) { 6691 // Clear upper bits of YMM registers to avoid SSE <-> AVX transition penalty. 6692 vzeroupper(); 6693 } 6694 6695 #ifndef _LP64 6696 // Either restore the x87 floating pointer control word after returning 6697 // from the JNI call or verify that it wasn't changed. 6698 if (CheckJNICalls) { 6699 call(RuntimeAddress(StubRoutines::x86::verify_fpu_cntrl_wrd_entry())); 6700 } 6701 #endif // _LP64 6702 } 6703 6704 6705 void MacroAssembler::load_klass(Register dst, Register src) { 6706 #ifdef _LP64 6707 if (UseCompressedClassPointers) { 6708 movl(dst, Address(src, oopDesc::klass_offset_in_bytes())); 6709 decode_klass_not_null(dst); 6710 } else 6711 #endif 6712 movptr(dst, Address(src, oopDesc::klass_offset_in_bytes())); 6713 } 6714 6715 void MacroAssembler::load_prototype_header(Register dst, Register src) { 6716 load_klass(dst, src); 6717 movptr(dst, Address(dst, Klass::prototype_header_offset())); 6718 } 6719 6720 void MacroAssembler::store_klass(Register dst, Register src) { 6721 #ifdef _LP64 6722 if (UseCompressedClassPointers) { 6723 encode_klass_not_null(src); 6724 movl(Address(dst, oopDesc::klass_offset_in_bytes()), src); 6725 } else 6726 #endif 6727 movptr(Address(dst, oopDesc::klass_offset_in_bytes()), src); 6728 } 6729 6730 void MacroAssembler::load_heap_oop(Register dst, Address src) { 6731 #ifdef _LP64 6732 // FIXME: Must change all places where we try to load the klass. 6733 if (UseCompressedOops) { 6734 movl(dst, src); 6735 decode_heap_oop(dst); 6736 } else 6737 #endif 6738 movptr(dst, src); 6739 } 6740 6741 // Doesn't do verfication, generates fixed size code 6742 void MacroAssembler::load_heap_oop_not_null(Register dst, Address src) { 6743 #ifdef _LP64 6744 if (UseCompressedOops) { 6745 movl(dst, src); 6746 decode_heap_oop_not_null(dst); 6747 } else 6748 #endif 6749 movptr(dst, src); 6750 } 6751 6752 void MacroAssembler::store_heap_oop(Address dst, Register src) { 6753 #ifdef _LP64 6754 if (UseCompressedOops) { 6755 assert(!dst.uses(src), "not enough registers"); 6756 encode_heap_oop(src); 6757 movl(dst, src); 6758 } else 6759 #endif 6760 movptr(dst, src); 6761 } 6762 6763 void MacroAssembler::cmp_heap_oop(Register src1, Address src2, Register tmp) { 6764 assert_different_registers(src1, tmp); 6765 #ifdef _LP64 6766 if (UseCompressedOops) { 6767 bool did_push = false; 6768 if (tmp == noreg) { 6769 tmp = rax; 6770 push(tmp); 6771 did_push = true; 6772 assert(!src2.uses(rsp), "can't push"); 6773 } 6774 load_heap_oop(tmp, src2); 6775 cmpptr(src1, tmp); 6776 if (did_push) pop(tmp); 6777 } else 6778 #endif 6779 cmpptr(src1, src2); 6780 } 6781 6782 // Used for storing NULLs. 6783 void MacroAssembler::store_heap_oop_null(Address dst) { 6784 #ifdef _LP64 6785 if (UseCompressedOops) { 6786 movl(dst, (int32_t)NULL_WORD); 6787 } else { 6788 movslq(dst, (int32_t)NULL_WORD); 6789 } 6790 #else 6791 movl(dst, (int32_t)NULL_WORD); 6792 #endif 6793 } 6794 6795 #ifdef _LP64 6796 void MacroAssembler::store_klass_gap(Register dst, Register src) { 6797 if (UseCompressedClassPointers) { 6798 // Store to klass gap in destination 6799 movl(Address(dst, oopDesc::klass_gap_offset_in_bytes()), src); 6800 } 6801 } 6802 6803 #ifdef ASSERT 6804 void MacroAssembler::verify_heapbase(const char* msg) { 6805 assert (UseCompressedOops, "should be compressed"); 6806 assert (Universe::heap() != NULL, "java heap should be initialized"); 6807 if (CheckCompressedOops) { 6808 Label ok; 6809 push(rscratch1); // cmpptr trashes rscratch1 6810 cmpptr(r12_heapbase, ExternalAddress((address)Universe::narrow_ptrs_base_addr())); 6811 jcc(Assembler::equal, ok); 6812 STOP(msg); 6813 bind(ok); 6814 pop(rscratch1); 6815 } 6816 } 6817 #endif 6818 6819 // Algorithm must match oop.inline.hpp encode_heap_oop. 6820 void MacroAssembler::encode_heap_oop(Register r) { 6821 #ifdef ASSERT 6822 verify_heapbase("MacroAssembler::encode_heap_oop: heap base corrupted?"); 6823 #endif 6824 verify_oop(r, "broken oop in encode_heap_oop"); 6825 if (Universe::narrow_oop_base() == NULL) { 6826 if (Universe::narrow_oop_shift() != 0) { 6827 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); 6828 shrq(r, LogMinObjAlignmentInBytes); 6829 } 6830 return; 6831 } 6832 testq(r, r); 6833 cmovq(Assembler::equal, r, r12_heapbase); 6834 subq(r, r12_heapbase); 6835 shrq(r, LogMinObjAlignmentInBytes); 6836 } 6837 6838 void MacroAssembler::encode_heap_oop_not_null(Register r) { 6839 #ifdef ASSERT 6840 verify_heapbase("MacroAssembler::encode_heap_oop_not_null: heap base corrupted?"); 6841 if (CheckCompressedOops) { 6842 Label ok; 6843 testq(r, r); 6844 jcc(Assembler::notEqual, ok); 6845 STOP("null oop passed to encode_heap_oop_not_null"); 6846 bind(ok); 6847 } 6848 #endif 6849 verify_oop(r, "broken oop in encode_heap_oop_not_null"); 6850 if (Universe::narrow_oop_base() != NULL) { 6851 subq(r, r12_heapbase); 6852 } 6853 if (Universe::narrow_oop_shift() != 0) { 6854 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); 6855 shrq(r, LogMinObjAlignmentInBytes); 6856 } 6857 } 6858 6859 void MacroAssembler::encode_heap_oop_not_null(Register dst, Register src) { 6860 #ifdef ASSERT 6861 verify_heapbase("MacroAssembler::encode_heap_oop_not_null2: heap base corrupted?"); 6862 if (CheckCompressedOops) { 6863 Label ok; 6864 testq(src, src); 6865 jcc(Assembler::notEqual, ok); 6866 STOP("null oop passed to encode_heap_oop_not_null2"); 6867 bind(ok); 6868 } 6869 #endif 6870 verify_oop(src, "broken oop in encode_heap_oop_not_null2"); 6871 if (dst != src) { 6872 movq(dst, src); 6873 } 6874 if (Universe::narrow_oop_base() != NULL) { 6875 subq(dst, r12_heapbase); 6876 } 6877 if (Universe::narrow_oop_shift() != 0) { 6878 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); 6879 shrq(dst, LogMinObjAlignmentInBytes); 6880 } 6881 } 6882 6883 void MacroAssembler::decode_heap_oop(Register r) { 6884 #ifdef ASSERT 6885 verify_heapbase("MacroAssembler::decode_heap_oop: heap base corrupted?"); 6886 #endif 6887 if (Universe::narrow_oop_base() == NULL) { 6888 if (Universe::narrow_oop_shift() != 0) { 6889 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); 6890 shlq(r, LogMinObjAlignmentInBytes); 6891 } 6892 } else { 6893 Label done; 6894 shlq(r, LogMinObjAlignmentInBytes); 6895 jccb(Assembler::equal, done); 6896 addq(r, r12_heapbase); 6897 bind(done); 6898 } 6899 verify_oop(r, "broken oop in decode_heap_oop"); 6900 } 6901 6902 void MacroAssembler::decode_heap_oop_not_null(Register r) { 6903 // Note: it will change flags 6904 assert (UseCompressedOops, "should only be used for compressed headers"); 6905 assert (Universe::heap() != NULL, "java heap should be initialized"); 6906 // Cannot assert, unverified entry point counts instructions (see .ad file) 6907 // vtableStubs also counts instructions in pd_code_size_limit. 6908 // Also do not verify_oop as this is called by verify_oop. 6909 if (Universe::narrow_oop_shift() != 0) { 6910 assert(LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); 6911 shlq(r, LogMinObjAlignmentInBytes); 6912 if (Universe::narrow_oop_base() != NULL) { 6913 addq(r, r12_heapbase); 6914 } 6915 } else { 6916 assert (Universe::narrow_oop_base() == NULL, "sanity"); 6917 } 6918 } 6919 6920 void MacroAssembler::decode_heap_oop_not_null(Register dst, Register src) { 6921 // Note: it will change flags 6922 assert (UseCompressedOops, "should only be used for compressed headers"); 6923 assert (Universe::heap() != NULL, "java heap should be initialized"); 6924 // Cannot assert, unverified entry point counts instructions (see .ad file) 6925 // vtableStubs also counts instructions in pd_code_size_limit. 6926 // Also do not verify_oop as this is called by verify_oop. 6927 if (Universe::narrow_oop_shift() != 0) { 6928 assert(LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); 6929 if (LogMinObjAlignmentInBytes == Address::times_8) { 6930 leaq(dst, Address(r12_heapbase, src, Address::times_8, 0)); 6931 } else { 6932 if (dst != src) { 6933 movq(dst, src); 6934 } 6935 shlq(dst, LogMinObjAlignmentInBytes); 6936 if (Universe::narrow_oop_base() != NULL) { 6937 addq(dst, r12_heapbase); 6938 } 6939 } 6940 } else { 6941 assert (Universe::narrow_oop_base() == NULL, "sanity"); 6942 if (dst != src) { 6943 movq(dst, src); 6944 } 6945 } 6946 } 6947 6948 void MacroAssembler::encode_klass_not_null(Register r) { 6949 if (Universe::narrow_klass_base() != NULL) { 6950 // Use r12 as a scratch register in which to temporarily load the narrow_klass_base. 6951 assert(r != r12_heapbase, "Encoding a klass in r12"); 6952 mov64(r12_heapbase, (int64_t)Universe::narrow_klass_base()); 6953 subq(r, r12_heapbase); 6954 } 6955 if (Universe::narrow_klass_shift() != 0) { 6956 assert (LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); 6957 shrq(r, LogKlassAlignmentInBytes); 6958 } 6959 if (Universe::narrow_klass_base() != NULL) { 6960 reinit_heapbase(); 6961 } 6962 } 6963 6964 void MacroAssembler::encode_klass_not_null(Register dst, Register src) { 6965 if (dst == src) { 6966 encode_klass_not_null(src); 6967 } else { 6968 if (Universe::narrow_klass_base() != NULL) { 6969 mov64(dst, (int64_t)Universe::narrow_klass_base()); 6970 negq(dst); 6971 addq(dst, src); 6972 } else { 6973 movptr(dst, src); 6974 } 6975 if (Universe::narrow_klass_shift() != 0) { 6976 assert (LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); 6977 shrq(dst, LogKlassAlignmentInBytes); 6978 } 6979 } 6980 } 6981 6982 // Function instr_size_for_decode_klass_not_null() counts the instructions 6983 // generated by decode_klass_not_null(register r) and reinit_heapbase(), 6984 // when (Universe::heap() != NULL). Hence, if the instructions they 6985 // generate change, then this method needs to be updated. 6986 int MacroAssembler::instr_size_for_decode_klass_not_null() { 6987 assert (UseCompressedClassPointers, "only for compressed klass ptrs"); 6988 if (Universe::narrow_klass_base() != NULL) { 6989 // mov64 + addq + shlq? + mov64 (for reinit_heapbase()). 6990 return (Universe::narrow_klass_shift() == 0 ? 20 : 24); 6991 } else { 6992 // longest load decode klass function, mov64, leaq 6993 return 16; 6994 } 6995 } 6996 6997 // !!! If the instructions that get generated here change then function 6998 // instr_size_for_decode_klass_not_null() needs to get updated. 6999 void MacroAssembler::decode_klass_not_null(Register r) { 7000 // Note: it will change flags 7001 assert (UseCompressedClassPointers, "should only be used for compressed headers"); 7002 assert(r != r12_heapbase, "Decoding a klass in r12"); 7003 // Cannot assert, unverified entry point counts instructions (see .ad file) 7004 // vtableStubs also counts instructions in pd_code_size_limit. 7005 // Also do not verify_oop as this is called by verify_oop. 7006 if (Universe::narrow_klass_shift() != 0) { 7007 assert(LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); 7008 shlq(r, LogKlassAlignmentInBytes); 7009 } 7010 // Use r12 as a scratch register in which to temporarily load the narrow_klass_base. 7011 if (Universe::narrow_klass_base() != NULL) { 7012 mov64(r12_heapbase, (int64_t)Universe::narrow_klass_base()); 7013 addq(r, r12_heapbase); 7014 reinit_heapbase(); 7015 } 7016 } 7017 7018 void MacroAssembler::decode_klass_not_null(Register dst, Register src) { 7019 // Note: it will change flags 7020 assert (UseCompressedClassPointers, "should only be used for compressed headers"); 7021 if (dst == src) { 7022 decode_klass_not_null(dst); 7023 } else { 7024 // Cannot assert, unverified entry point counts instructions (see .ad file) 7025 // vtableStubs also counts instructions in pd_code_size_limit. 7026 // Also do not verify_oop as this is called by verify_oop. 7027 mov64(dst, (int64_t)Universe::narrow_klass_base()); 7028 if (Universe::narrow_klass_shift() != 0) { 7029 assert(LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); 7030 assert(LogKlassAlignmentInBytes == Address::times_8, "klass not aligned on 64bits?"); 7031 leaq(dst, Address(dst, src, Address::times_8, 0)); 7032 } else { 7033 addq(dst, src); 7034 } 7035 } 7036 } 7037 7038 void MacroAssembler::set_narrow_oop(Register dst, jobject obj) { 7039 assert (UseCompressedOops, "should only be used for compressed headers"); 7040 assert (Universe::heap() != NULL, "java heap should be initialized"); 7041 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); 7042 int oop_index = oop_recorder()->find_index(obj); 7043 RelocationHolder rspec = oop_Relocation::spec(oop_index); 7044 mov_narrow_oop(dst, oop_index, rspec); 7045 } 7046 7047 void MacroAssembler::set_narrow_oop(Address dst, jobject obj) { 7048 assert (UseCompressedOops, "should only be used for compressed headers"); 7049 assert (Universe::heap() != NULL, "java heap should be initialized"); 7050 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); 7051 int oop_index = oop_recorder()->find_index(obj); 7052 RelocationHolder rspec = oop_Relocation::spec(oop_index); 7053 mov_narrow_oop(dst, oop_index, rspec); 7054 } 7055 7056 void MacroAssembler::set_narrow_klass(Register dst, Klass* k) { 7057 assert (UseCompressedClassPointers, "should only be used for compressed headers"); 7058 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); 7059 int klass_index = oop_recorder()->find_index(k); 7060 RelocationHolder rspec = metadata_Relocation::spec(klass_index); 7061 mov_narrow_oop(dst, Klass::encode_klass(k), rspec); 7062 } 7063 7064 void MacroAssembler::set_narrow_klass(Address dst, Klass* k) { 7065 assert (UseCompressedClassPointers, "should only be used for compressed headers"); 7066 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); 7067 int klass_index = oop_recorder()->find_index(k); 7068 RelocationHolder rspec = metadata_Relocation::spec(klass_index); 7069 mov_narrow_oop(dst, Klass::encode_klass(k), rspec); 7070 } 7071 7072 void MacroAssembler::cmp_narrow_oop(Register dst, jobject obj) { 7073 assert (UseCompressedOops, "should only be used for compressed headers"); 7074 assert (Universe::heap() != NULL, "java heap should be initialized"); 7075 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); 7076 int oop_index = oop_recorder()->find_index(obj); 7077 RelocationHolder rspec = oop_Relocation::spec(oop_index); 7078 Assembler::cmp_narrow_oop(dst, oop_index, rspec); 7079 } 7080 7081 void MacroAssembler::cmp_narrow_oop(Address dst, jobject obj) { 7082 assert (UseCompressedOops, "should only be used for compressed headers"); 7083 assert (Universe::heap() != NULL, "java heap should be initialized"); 7084 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); 7085 int oop_index = oop_recorder()->find_index(obj); 7086 RelocationHolder rspec = oop_Relocation::spec(oop_index); 7087 Assembler::cmp_narrow_oop(dst, oop_index, rspec); 7088 } 7089 7090 void MacroAssembler::cmp_narrow_klass(Register dst, Klass* k) { 7091 assert (UseCompressedClassPointers, "should only be used for compressed headers"); 7092 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); 7093 int klass_index = oop_recorder()->find_index(k); 7094 RelocationHolder rspec = metadata_Relocation::spec(klass_index); 7095 Assembler::cmp_narrow_oop(dst, Klass::encode_klass(k), rspec); 7096 } 7097 7098 void MacroAssembler::cmp_narrow_klass(Address dst, Klass* k) { 7099 assert (UseCompressedClassPointers, "should only be used for compressed headers"); 7100 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); 7101 int klass_index = oop_recorder()->find_index(k); 7102 RelocationHolder rspec = metadata_Relocation::spec(klass_index); 7103 Assembler::cmp_narrow_oop(dst, Klass::encode_klass(k), rspec); 7104 } 7105 7106 void MacroAssembler::reinit_heapbase() { 7107 if (UseCompressedOops || UseCompressedClassPointers) { 7108 if (Universe::heap() != NULL) { 7109 if (Universe::narrow_oop_base() == NULL) { 7110 MacroAssembler::xorptr(r12_heapbase, r12_heapbase); 7111 } else { 7112 mov64(r12_heapbase, (int64_t)Universe::narrow_ptrs_base()); 7113 } 7114 } else { 7115 movptr(r12_heapbase, ExternalAddress((address)Universe::narrow_ptrs_base_addr())); 7116 } 7117 } 7118 } 7119 7120 #endif // _LP64 7121 7122 7123 // C2 compiled method's prolog code. 7124 void MacroAssembler::verified_entry(int framesize, int stack_bang_size, bool fp_mode_24b) { 7125 7126 // WARNING: Initial instruction MUST be 5 bytes or longer so that 7127 // NativeJump::patch_verified_entry will be able to patch out the entry 7128 // code safely. The push to verify stack depth is ok at 5 bytes, 7129 // the frame allocation can be either 3 or 6 bytes. So if we don't do 7130 // stack bang then we must use the 6 byte frame allocation even if 7131 // we have no frame. :-( 7132 assert(stack_bang_size >= framesize || stack_bang_size <= 0, "stack bang size incorrect"); 7133 7134 assert((framesize & (StackAlignmentInBytes-1)) == 0, "frame size not aligned"); 7135 // Remove word for return addr 7136 framesize -= wordSize; 7137 stack_bang_size -= wordSize; 7138 7139 // Calls to C2R adapters often do not accept exceptional returns. 7140 // We require that their callers must bang for them. But be careful, because 7141 // some VM calls (such as call site linkage) can use several kilobytes of 7142 // stack. But the stack safety zone should account for that. 7143 // See bugs 4446381, 4468289, 4497237. 7144 if (stack_bang_size > 0) { 7145 generate_stack_overflow_check(stack_bang_size); 7146 7147 // We always push rbp, so that on return to interpreter rbp, will be 7148 // restored correctly and we can correct the stack. 7149 push(rbp); 7150 // Save caller's stack pointer into RBP if the frame pointer is preserved. 7151 if (PreserveFramePointer) { 7152 mov(rbp, rsp); 7153 } 7154 // Remove word for ebp 7155 framesize -= wordSize; 7156 7157 // Create frame 7158 if (framesize) { 7159 subptr(rsp, framesize); 7160 } 7161 } else { 7162 // Create frame (force generation of a 4 byte immediate value) 7163 subptr_imm32(rsp, framesize); 7164 7165 // Save RBP register now. 7166 framesize -= wordSize; 7167 movptr(Address(rsp, framesize), rbp); 7168 // Save caller's stack pointer into RBP if the frame pointer is preserved. 7169 if (PreserveFramePointer) { 7170 movptr(rbp, rsp); 7171 if (framesize > 0) { 7172 addptr(rbp, framesize); 7173 } 7174 } 7175 } 7176 7177 if (VerifyStackAtCalls) { // Majik cookie to verify stack depth 7178 framesize -= wordSize; 7179 movptr(Address(rsp, framesize), (int32_t)0xbadb100d); 7180 } 7181 7182 #ifndef _LP64 7183 // If method sets FPU control word do it now 7184 if (fp_mode_24b) { 7185 fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_24())); 7186 } 7187 if (UseSSE >= 2 && VerifyFPU) { 7188 verify_FPU(0, "FPU stack must be clean on entry"); 7189 } 7190 #endif 7191 7192 #ifdef ASSERT 7193 if (VerifyStackAtCalls) { 7194 Label L; 7195 push(rax); 7196 mov(rax, rsp); 7197 andptr(rax, StackAlignmentInBytes-1); 7198 cmpptr(rax, StackAlignmentInBytes-wordSize); 7199 pop(rax); 7200 jcc(Assembler::equal, L); 7201 STOP("Stack is not properly aligned!"); 7202 bind(L); 7203 } 7204 #endif 7205 7206 } 7207 7208 void MacroAssembler::clear_mem(Register base, Register cnt, Register tmp) { 7209 // cnt - number of qwords (8-byte words). 7210 // base - start address, qword aligned. 7211 assert(base==rdi, "base register must be edi for rep stos"); 7212 assert(tmp==rax, "tmp register must be eax for rep stos"); 7213 assert(cnt==rcx, "cnt register must be ecx for rep stos"); 7214 7215 xorptr(tmp, tmp); 7216 if (UseFastStosb) { 7217 shlptr(cnt,3); // convert to number of bytes 7218 rep_stosb(); 7219 } else { 7220 NOT_LP64(shlptr(cnt,1);) // convert to number of dwords for 32-bit VM 7221 rep_stos(); 7222 } 7223 } 7224 7225 #ifdef COMPILER2 7226 7227 // IndexOf for constant substrings with size >= 8 chars 7228 // which don't need to be loaded through stack. 7229 void MacroAssembler::string_indexofC8(Register str1, Register str2, 7230 Register cnt1, Register cnt2, 7231 int int_cnt2, Register result, 7232 XMMRegister vec, Register tmp, 7233 int ae) { 7234 ShortBranchVerifier sbv(this); 7235 assert(UseSSE42Intrinsics, "SSE4.2 intrinsics are required"); 7236 assert(UseSSE >= 4, "SSE4 must be enabled for SSE4.2 intrinsics to be available"); 7237 assert(ae != StrIntrinsicNode::LU, "Invalid encoding"); 7238 7239 // This method uses the pcmpestri instruction with bound registers 7240 // inputs: 7241 // xmm - substring 7242 // rax - substring length (elements count) 7243 // mem - scanned string 7244 // rdx - string length (elements count) 7245 // 0xd - mode: 1100 (substring search) + 01 (unsigned shorts) 7246 // 0xc - mode: 1100 (substring search) + 00 (unsigned bytes) 7247 // outputs: 7248 // rcx - matched index in string 7249 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri"); 7250 int mode = (ae == StrIntrinsicNode::LL) ? 0x0c : 0x0d; // bytes or shorts 7251 int stride = (ae == StrIntrinsicNode::LL) ? 16 : 8; //UU, UL -> 8 7252 Address::ScaleFactor scale1 = (ae == StrIntrinsicNode::LL) ? Address::times_1 : Address::times_2; 7253 Address::ScaleFactor scale2 = (ae == StrIntrinsicNode::UL) ? Address::times_1 : scale1; 7254 7255 Label RELOAD_SUBSTR, SCAN_TO_SUBSTR, SCAN_SUBSTR, 7256 RET_FOUND, RET_NOT_FOUND, EXIT, FOUND_SUBSTR, 7257 MATCH_SUBSTR_HEAD, RELOAD_STR, FOUND_CANDIDATE; 7258 7259 // Note, inline_string_indexOf() generates checks: 7260 // if (substr.count > string.count) return -1; 7261 // if (substr.count == 0) return 0; 7262 assert(int_cnt2 >= stride, "this code is used only for cnt2 >= 8 chars"); 7263 7264 // Load substring. 7265 if (ae == StrIntrinsicNode::UL) { 7266 pmovzxbw(vec, Address(str2, 0)); 7267 } else { 7268 movdqu(vec, Address(str2, 0)); 7269 } 7270 movl(cnt2, int_cnt2); 7271 movptr(result, str1); // string addr 7272 7273 if (int_cnt2 > stride) { 7274 jmpb(SCAN_TO_SUBSTR); 7275 7276 // Reload substr for rescan, this code 7277 // is executed only for large substrings (> 8 chars) 7278 bind(RELOAD_SUBSTR); 7279 if (ae == StrIntrinsicNode::UL) { 7280 pmovzxbw(vec, Address(str2, 0)); 7281 } else { 7282 movdqu(vec, Address(str2, 0)); 7283 } 7284 negptr(cnt2); // Jumped here with negative cnt2, convert to positive 7285 7286 bind(RELOAD_STR); 7287 // We came here after the beginning of the substring was 7288 // matched but the rest of it was not so we need to search 7289 // again. Start from the next element after the previous match. 7290 7291 // cnt2 is number of substring reminding elements and 7292 // cnt1 is number of string reminding elements when cmp failed. 7293 // Restored cnt1 = cnt1 - cnt2 + int_cnt2 7294 subl(cnt1, cnt2); 7295 addl(cnt1, int_cnt2); 7296 movl(cnt2, int_cnt2); // Now restore cnt2 7297 7298 decrementl(cnt1); // Shift to next element 7299 cmpl(cnt1, cnt2); 7300 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring 7301 7302 addptr(result, (1<<scale1)); 7303 7304 } // (int_cnt2 > 8) 7305 7306 // Scan string for start of substr in 16-byte vectors 7307 bind(SCAN_TO_SUBSTR); 7308 pcmpestri(vec, Address(result, 0), mode); 7309 jccb(Assembler::below, FOUND_CANDIDATE); // CF == 1 7310 subl(cnt1, stride); 7311 jccb(Assembler::lessEqual, RET_NOT_FOUND); // Scanned full string 7312 cmpl(cnt1, cnt2); 7313 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring 7314 addptr(result, 16); 7315 jmpb(SCAN_TO_SUBSTR); 7316 7317 // Found a potential substr 7318 bind(FOUND_CANDIDATE); 7319 // Matched whole vector if first element matched (tmp(rcx) == 0). 7320 if (int_cnt2 == stride) { 7321 jccb(Assembler::overflow, RET_FOUND); // OF == 1 7322 } else { // int_cnt2 > 8 7323 jccb(Assembler::overflow, FOUND_SUBSTR); 7324 } 7325 // After pcmpestri tmp(rcx) contains matched element index 7326 // Compute start addr of substr 7327 lea(result, Address(result, tmp, scale1)); 7328 7329 // Make sure string is still long enough 7330 subl(cnt1, tmp); 7331 cmpl(cnt1, cnt2); 7332 if (int_cnt2 == stride) { 7333 jccb(Assembler::greaterEqual, SCAN_TO_SUBSTR); 7334 } else { // int_cnt2 > 8 7335 jccb(Assembler::greaterEqual, MATCH_SUBSTR_HEAD); 7336 } 7337 // Left less then substring. 7338 7339 bind(RET_NOT_FOUND); 7340 movl(result, -1); 7341 jmpb(EXIT); 7342 7343 if (int_cnt2 > stride) { 7344 // This code is optimized for the case when whole substring 7345 // is matched if its head is matched. 7346 bind(MATCH_SUBSTR_HEAD); 7347 pcmpestri(vec, Address(result, 0), mode); 7348 // Reload only string if does not match 7349 jccb(Assembler::noOverflow, RELOAD_STR); // OF == 0 7350 7351 Label CONT_SCAN_SUBSTR; 7352 // Compare the rest of substring (> 8 chars). 7353 bind(FOUND_SUBSTR); 7354 // First 8 chars are already matched. 7355 negptr(cnt2); 7356 addptr(cnt2, stride); 7357 7358 bind(SCAN_SUBSTR); 7359 subl(cnt1, stride); 7360 cmpl(cnt2, -stride); // Do not read beyond substring 7361 jccb(Assembler::lessEqual, CONT_SCAN_SUBSTR); 7362 // Back-up strings to avoid reading beyond substring: 7363 // cnt1 = cnt1 - cnt2 + 8 7364 addl(cnt1, cnt2); // cnt2 is negative 7365 addl(cnt1, stride); 7366 movl(cnt2, stride); negptr(cnt2); 7367 bind(CONT_SCAN_SUBSTR); 7368 if (int_cnt2 < (int)G) { 7369 int tail_off1 = int_cnt2<<scale1; 7370 int tail_off2 = int_cnt2<<scale2; 7371 if (ae == StrIntrinsicNode::UL) { 7372 pmovzxbw(vec, Address(str2, cnt2, scale2, tail_off2)); 7373 } else { 7374 movdqu(vec, Address(str2, cnt2, scale2, tail_off2)); 7375 } 7376 pcmpestri(vec, Address(result, cnt2, scale1, tail_off1), mode); 7377 } else { 7378 // calculate index in register to avoid integer overflow (int_cnt2*2) 7379 movl(tmp, int_cnt2); 7380 addptr(tmp, cnt2); 7381 if (ae == StrIntrinsicNode::UL) { 7382 pmovzxbw(vec, Address(str2, tmp, scale2, 0)); 7383 } else { 7384 movdqu(vec, Address(str2, tmp, scale2, 0)); 7385 } 7386 pcmpestri(vec, Address(result, tmp, scale1, 0), mode); 7387 } 7388 // Need to reload strings pointers if not matched whole vector 7389 jcc(Assembler::noOverflow, RELOAD_SUBSTR); // OF == 0 7390 addptr(cnt2, stride); 7391 jcc(Assembler::negative, SCAN_SUBSTR); 7392 // Fall through if found full substring 7393 7394 } // (int_cnt2 > 8) 7395 7396 bind(RET_FOUND); 7397 // Found result if we matched full small substring. 7398 // Compute substr offset 7399 subptr(result, str1); 7400 if (ae == StrIntrinsicNode::UU || ae == StrIntrinsicNode::UL) { 7401 shrl(result, 1); // index 7402 } 7403 bind(EXIT); 7404 7405 } // string_indexofC8 7406 7407 // Small strings are loaded through stack if they cross page boundary. 7408 void MacroAssembler::string_indexof(Register str1, Register str2, 7409 Register cnt1, Register cnt2, 7410 int int_cnt2, Register result, 7411 XMMRegister vec, Register tmp, 7412 int ae) { 7413 ShortBranchVerifier sbv(this); 7414 assert(UseSSE42Intrinsics, "SSE4.2 intrinsics are required"); 7415 assert(UseSSE >= 4, "SSE4 must be enabled for SSE4.2 intrinsics to be available"); 7416 assert(ae != StrIntrinsicNode::LU, "Invalid encoding"); 7417 7418 // 7419 // int_cnt2 is length of small (< 8 chars) constant substring 7420 // or (-1) for non constant substring in which case its length 7421 // is in cnt2 register. 7422 // 7423 // Note, inline_string_indexOf() generates checks: 7424 // if (substr.count > string.count) return -1; 7425 // if (substr.count == 0) return 0; 7426 // 7427 int stride = (ae == StrIntrinsicNode::LL) ? 16 : 8; //UU, UL -> 8 7428 assert(int_cnt2 == -1 || (0 < int_cnt2 && int_cnt2 < stride), "should be != 0"); 7429 // This method uses the pcmpestri instruction with bound registers 7430 // inputs: 7431 // xmm - substring 7432 // rax - substring length (elements count) 7433 // mem - scanned string 7434 // rdx - string length (elements count) 7435 // 0xd - mode: 1100 (substring search) + 01 (unsigned shorts) 7436 // 0xc - mode: 1100 (substring search) + 00 (unsigned bytes) 7437 // outputs: 7438 // rcx - matched index in string 7439 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri"); 7440 int mode = (ae == StrIntrinsicNode::LL) ? 0x0c : 0x0d; // bytes or shorts 7441 Address::ScaleFactor scale1 = (ae == StrIntrinsicNode::LL) ? Address::times_1 : Address::times_2; 7442 Address::ScaleFactor scale2 = (ae == StrIntrinsicNode::UL) ? Address::times_1 : scale1; 7443 7444 Label RELOAD_SUBSTR, SCAN_TO_SUBSTR, SCAN_SUBSTR, ADJUST_STR, 7445 RET_FOUND, RET_NOT_FOUND, CLEANUP, FOUND_SUBSTR, 7446 FOUND_CANDIDATE; 7447 7448 { //======================================================== 7449 // We don't know where these strings are located 7450 // and we can't read beyond them. Load them through stack. 7451 Label BIG_STRINGS, CHECK_STR, COPY_SUBSTR, COPY_STR; 7452 7453 movptr(tmp, rsp); // save old SP 7454 7455 if (int_cnt2 > 0) { // small (< 8 chars) constant substring 7456 if (int_cnt2 == (1>>scale2)) { // One byte 7457 assert((ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UL), "Only possible for latin1 encoding"); 7458 load_unsigned_byte(result, Address(str2, 0)); 7459 movdl(vec, result); // move 32 bits 7460 } else if (ae == StrIntrinsicNode::LL && int_cnt2 == 3) { // Three bytes 7461 // Not enough header space in 32-bit VM: 12+3 = 15. 7462 movl(result, Address(str2, -1)); 7463 shrl(result, 8); 7464 movdl(vec, result); // move 32 bits 7465 } else if (ae != StrIntrinsicNode::UL && int_cnt2 == (2>>scale2)) { // One char 7466 load_unsigned_short(result, Address(str2, 0)); 7467 movdl(vec, result); // move 32 bits 7468 } else if (ae != StrIntrinsicNode::UL && int_cnt2 == (4>>scale2)) { // Two chars 7469 movdl(vec, Address(str2, 0)); // move 32 bits 7470 } else if (ae != StrIntrinsicNode::UL && int_cnt2 == (8>>scale2)) { // Four chars 7471 movq(vec, Address(str2, 0)); // move 64 bits 7472 } else { // cnt2 = { 3, 5, 6, 7 } || (ae == StrIntrinsicNode::UL && cnt2 ={2, ..., 7}) 7473 // Array header size is 12 bytes in 32-bit VM 7474 // + 6 bytes for 3 chars == 18 bytes, 7475 // enough space to load vec and shift. 7476 assert(HeapWordSize*TypeArrayKlass::header_size() >= 12,"sanity"); 7477 if (ae == StrIntrinsicNode::UL) { 7478 int tail_off = int_cnt2-8; 7479 pmovzxbw(vec, Address(str2, tail_off)); 7480 psrldq(vec, -2*tail_off); 7481 } 7482 else { 7483 int tail_off = int_cnt2*(1<<scale2); 7484 movdqu(vec, Address(str2, tail_off-16)); 7485 psrldq(vec, 16-tail_off); 7486 } 7487 } 7488 } else { // not constant substring 7489 cmpl(cnt2, stride); 7490 jccb(Assembler::aboveEqual, BIG_STRINGS); // Both strings are big enough 7491 7492 // We can read beyond string if srt+16 does not cross page boundary 7493 // since heaps are aligned and mapped by pages. 7494 assert(os::vm_page_size() < (int)G, "default page should be small"); 7495 movl(result, str2); // We need only low 32 bits 7496 andl(result, (os::vm_page_size()-1)); 7497 cmpl(result, (os::vm_page_size()-16)); 7498 jccb(Assembler::belowEqual, CHECK_STR); 7499 7500 // Move small strings to stack to allow load 16 bytes into vec. 7501 subptr(rsp, 16); 7502 int stk_offset = wordSize-(1<<scale2); 7503 push(cnt2); 7504 7505 bind(COPY_SUBSTR); 7506 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UL) { 7507 load_unsigned_byte(result, Address(str2, cnt2, scale2, -1)); 7508 movb(Address(rsp, cnt2, scale2, stk_offset), result); 7509 } else if (ae == StrIntrinsicNode::UU) { 7510 load_unsigned_short(result, Address(str2, cnt2, scale2, -2)); 7511 movw(Address(rsp, cnt2, scale2, stk_offset), result); 7512 } 7513 decrement(cnt2); 7514 jccb(Assembler::notZero, COPY_SUBSTR); 7515 7516 pop(cnt2); 7517 movptr(str2, rsp); // New substring address 7518 } // non constant 7519 7520 bind(CHECK_STR); 7521 cmpl(cnt1, stride); 7522 jccb(Assembler::aboveEqual, BIG_STRINGS); 7523 7524 // Check cross page boundary. 7525 movl(result, str1); // We need only low 32 bits 7526 andl(result, (os::vm_page_size()-1)); 7527 cmpl(result, (os::vm_page_size()-16)); 7528 jccb(Assembler::belowEqual, BIG_STRINGS); 7529 7530 subptr(rsp, 16); 7531 int stk_offset = -(1<<scale1); 7532 if (int_cnt2 < 0) { // not constant 7533 push(cnt2); 7534 stk_offset += wordSize; 7535 } 7536 movl(cnt2, cnt1); 7537 7538 bind(COPY_STR); 7539 if (ae == StrIntrinsicNode::LL) { 7540 load_unsigned_byte(result, Address(str1, cnt2, scale1, -1)); 7541 movb(Address(rsp, cnt2, scale1, stk_offset), result); 7542 } else { 7543 load_unsigned_short(result, Address(str1, cnt2, scale1, -2)); 7544 movw(Address(rsp, cnt2, scale1, stk_offset), result); 7545 } 7546 decrement(cnt2); 7547 jccb(Assembler::notZero, COPY_STR); 7548 7549 if (int_cnt2 < 0) { // not constant 7550 pop(cnt2); 7551 } 7552 movptr(str1, rsp); // New string address 7553 7554 bind(BIG_STRINGS); 7555 // Load substring. 7556 if (int_cnt2 < 0) { // -1 7557 if (ae == StrIntrinsicNode::UL) { 7558 pmovzxbw(vec, Address(str2, 0)); 7559 } else { 7560 movdqu(vec, Address(str2, 0)); 7561 } 7562 push(cnt2); // substr count 7563 push(str2); // substr addr 7564 push(str1); // string addr 7565 } else { 7566 // Small (< 8 chars) constant substrings are loaded already. 7567 movl(cnt2, int_cnt2); 7568 } 7569 push(tmp); // original SP 7570 7571 } // Finished loading 7572 7573 //======================================================== 7574 // Start search 7575 // 7576 7577 movptr(result, str1); // string addr 7578 7579 if (int_cnt2 < 0) { // Only for non constant substring 7580 jmpb(SCAN_TO_SUBSTR); 7581 7582 // SP saved at sp+0 7583 // String saved at sp+1*wordSize 7584 // Substr saved at sp+2*wordSize 7585 // Substr count saved at sp+3*wordSize 7586 7587 // Reload substr for rescan, this code 7588 // is executed only for large substrings (> 8 chars) 7589 bind(RELOAD_SUBSTR); 7590 movptr(str2, Address(rsp, 2*wordSize)); 7591 movl(cnt2, Address(rsp, 3*wordSize)); 7592 if (ae == StrIntrinsicNode::UL) { 7593 pmovzxbw(vec, Address(str2, 0)); 7594 } else { 7595 movdqu(vec, Address(str2, 0)); 7596 } 7597 // We came here after the beginning of the substring was 7598 // matched but the rest of it was not so we need to search 7599 // again. Start from the next element after the previous match. 7600 subptr(str1, result); // Restore counter 7601 if (ae == StrIntrinsicNode::UU || ae == StrIntrinsicNode::UL) { 7602 shrl(str1, 1); 7603 } 7604 addl(cnt1, str1); 7605 decrementl(cnt1); // Shift to next element 7606 cmpl(cnt1, cnt2); 7607 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring 7608 7609 addptr(result, (1<<scale1)); 7610 } // non constant 7611 7612 // Scan string for start of substr in 16-byte vectors 7613 bind(SCAN_TO_SUBSTR); 7614 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri"); 7615 pcmpestri(vec, Address(result, 0), mode); 7616 jccb(Assembler::below, FOUND_CANDIDATE); // CF == 1 7617 subl(cnt1, stride); 7618 jccb(Assembler::lessEqual, RET_NOT_FOUND); // Scanned full string 7619 cmpl(cnt1, cnt2); 7620 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring 7621 addptr(result, 16); 7622 7623 bind(ADJUST_STR); 7624 cmpl(cnt1, stride); // Do not read beyond string 7625 jccb(Assembler::greaterEqual, SCAN_TO_SUBSTR); 7626 // Back-up string to avoid reading beyond string. 7627 lea(result, Address(result, cnt1, scale1, -16)); 7628 movl(cnt1, stride); 7629 jmpb(SCAN_TO_SUBSTR); 7630 7631 // Found a potential substr 7632 bind(FOUND_CANDIDATE); 7633 // After pcmpestri tmp(rcx) contains matched element index 7634 7635 // Make sure string is still long enough 7636 subl(cnt1, tmp); 7637 cmpl(cnt1, cnt2); 7638 jccb(Assembler::greaterEqual, FOUND_SUBSTR); 7639 // Left less then substring. 7640 7641 bind(RET_NOT_FOUND); 7642 movl(result, -1); 7643 jmpb(CLEANUP); 7644 7645 bind(FOUND_SUBSTR); 7646 // Compute start addr of substr 7647 lea(result, Address(result, tmp, scale1)); 7648 if (int_cnt2 > 0) { // Constant substring 7649 // Repeat search for small substring (< 8 chars) 7650 // from new point without reloading substring. 7651 // Have to check that we don't read beyond string. 7652 cmpl(tmp, stride-int_cnt2); 7653 jccb(Assembler::greater, ADJUST_STR); 7654 // Fall through if matched whole substring. 7655 } else { // non constant 7656 assert(int_cnt2 == -1, "should be != 0"); 7657 7658 addl(tmp, cnt2); 7659 // Found result if we matched whole substring. 7660 cmpl(tmp, stride); 7661 jccb(Assembler::lessEqual, RET_FOUND); 7662 7663 // Repeat search for small substring (<= 8 chars) 7664 // from new point 'str1' without reloading substring. 7665 cmpl(cnt2, stride); 7666 // Have to check that we don't read beyond string. 7667 jccb(Assembler::lessEqual, ADJUST_STR); 7668 7669 Label CHECK_NEXT, CONT_SCAN_SUBSTR, RET_FOUND_LONG; 7670 // Compare the rest of substring (> 8 chars). 7671 movptr(str1, result); 7672 7673 cmpl(tmp, cnt2); 7674 // First 8 chars are already matched. 7675 jccb(Assembler::equal, CHECK_NEXT); 7676 7677 bind(SCAN_SUBSTR); 7678 pcmpestri(vec, Address(str1, 0), mode); 7679 // Need to reload strings pointers if not matched whole vector 7680 jcc(Assembler::noOverflow, RELOAD_SUBSTR); // OF == 0 7681 7682 bind(CHECK_NEXT); 7683 subl(cnt2, stride); 7684 jccb(Assembler::lessEqual, RET_FOUND_LONG); // Found full substring 7685 addptr(str1, 16); 7686 if (ae == StrIntrinsicNode::UL) { 7687 addptr(str2, 8); 7688 } else { 7689 addptr(str2, 16); 7690 } 7691 subl(cnt1, stride); 7692 cmpl(cnt2, stride); // Do not read beyond substring 7693 jccb(Assembler::greaterEqual, CONT_SCAN_SUBSTR); 7694 // Back-up strings to avoid reading beyond substring. 7695 7696 if (ae == StrIntrinsicNode::UL) { 7697 lea(str2, Address(str2, cnt2, scale2, -8)); 7698 lea(str1, Address(str1, cnt2, scale1, -16)); 7699 } else { 7700 lea(str2, Address(str2, cnt2, scale2, -16)); 7701 lea(str1, Address(str1, cnt2, scale1, -16)); 7702 } 7703 subl(cnt1, cnt2); 7704 movl(cnt2, stride); 7705 addl(cnt1, stride); 7706 bind(CONT_SCAN_SUBSTR); 7707 if (ae == StrIntrinsicNode::UL) { 7708 pmovzxbw(vec, Address(str2, 0)); 7709 } else { 7710 movdqu(vec, Address(str2, 0)); 7711 } 7712 jmpb(SCAN_SUBSTR); 7713 7714 bind(RET_FOUND_LONG); 7715 movptr(str1, Address(rsp, wordSize)); 7716 } // non constant 7717 7718 bind(RET_FOUND); 7719 // Compute substr offset 7720 subptr(result, str1); 7721 if (ae == StrIntrinsicNode::UU || ae == StrIntrinsicNode::UL) { 7722 shrl(result, 1); // index 7723 } 7724 bind(CLEANUP); 7725 pop(rsp); // restore SP 7726 7727 } // string_indexof 7728 7729 void MacroAssembler::string_indexof_char(Register str1, Register cnt1, Register ch, Register result, 7730 XMMRegister vec1, XMMRegister vec2, XMMRegister vec3, Register tmp) { 7731 ShortBranchVerifier sbv(this); 7732 assert(UseSSE42Intrinsics, "SSE4.2 intrinsics are required"); 7733 assert(UseSSE >= 4, "SSE4 must be enabled for SSE4.2 intrinsics to be available"); 7734 7735 int stride = 8; 7736 7737 Label FOUND_CHAR, SCAN_TO_CHAR, SCAN_TO_CHAR_LOOP, 7738 SCAN_TO_8_CHAR, SCAN_TO_8_CHAR_LOOP, SCAN_TO_16_CHAR_LOOP, 7739 RET_NOT_FOUND, SCAN_TO_8_CHAR_INIT, 7740 FOUND_SEQ_CHAR, DONE_LABEL; 7741 7742 movptr(result, str1); 7743 if (UseAVX >= 2) { 7744 cmpl(cnt1, stride); 7745 jccb(Assembler::less, SCAN_TO_CHAR_LOOP); 7746 cmpl(cnt1, 2*stride); 7747 jccb(Assembler::less, SCAN_TO_8_CHAR_INIT); 7748 movdl(vec1, ch); 7749 vpbroadcastw(vec1, vec1); 7750 vpxor(vec2, vec2); 7751 movl(tmp, cnt1); 7752 andl(tmp, 0xFFFFFFF0); //vector count (in chars) 7753 andl(cnt1,0x0000000F); //tail count (in chars) 7754 7755 bind(SCAN_TO_16_CHAR_LOOP); 7756 vmovdqu(vec3, Address(result, 0)); 7757 vpcmpeqw(vec3, vec3, vec1, 1); 7758 vptest(vec2, vec3); 7759 jcc(Assembler::carryClear, FOUND_CHAR); 7760 addptr(result, 32); 7761 subl(tmp, 2*stride); 7762 jccb(Assembler::notZero, SCAN_TO_16_CHAR_LOOP); 7763 jmp(SCAN_TO_8_CHAR); 7764 bind(SCAN_TO_8_CHAR_INIT); 7765 movdl(vec1, ch); 7766 pshuflw(vec1, vec1, 0x00); 7767 pshufd(vec1, vec1, 0); 7768 pxor(vec2, vec2); 7769 } 7770 bind(SCAN_TO_8_CHAR); 7771 cmpl(cnt1, stride); 7772 if (UseAVX >= 2) { 7773 jccb(Assembler::less, SCAN_TO_CHAR); 7774 } else { 7775 jccb(Assembler::less, SCAN_TO_CHAR_LOOP); 7776 movdl(vec1, ch); 7777 pshuflw(vec1, vec1, 0x00); 7778 pshufd(vec1, vec1, 0); 7779 pxor(vec2, vec2); 7780 } 7781 movl(tmp, cnt1); 7782 andl(tmp, 0xFFFFFFF8); //vector count (in chars) 7783 andl(cnt1,0x00000007); //tail count (in chars) 7784 7785 bind(SCAN_TO_8_CHAR_LOOP); 7786 movdqu(vec3, Address(result, 0)); 7787 pcmpeqw(vec3, vec1); 7788 ptest(vec2, vec3); 7789 jcc(Assembler::carryClear, FOUND_CHAR); 7790 addptr(result, 16); 7791 subl(tmp, stride); 7792 jccb(Assembler::notZero, SCAN_TO_8_CHAR_LOOP); 7793 bind(SCAN_TO_CHAR); 7794 testl(cnt1, cnt1); 7795 jcc(Assembler::zero, RET_NOT_FOUND); 7796 bind(SCAN_TO_CHAR_LOOP); 7797 load_unsigned_short(tmp, Address(result, 0)); 7798 cmpl(ch, tmp); 7799 jccb(Assembler::equal, FOUND_SEQ_CHAR); 7800 addptr(result, 2); 7801 subl(cnt1, 1); 7802 jccb(Assembler::zero, RET_NOT_FOUND); 7803 jmp(SCAN_TO_CHAR_LOOP); 7804 7805 bind(RET_NOT_FOUND); 7806 movl(result, -1); 7807 jmpb(DONE_LABEL); 7808 7809 bind(FOUND_CHAR); 7810 if (UseAVX >= 2) { 7811 vpmovmskb(tmp, vec3); 7812 } else { 7813 pmovmskb(tmp, vec3); 7814 } 7815 bsfl(ch, tmp); 7816 addl(result, ch); 7817 7818 bind(FOUND_SEQ_CHAR); 7819 subptr(result, str1); 7820 shrl(result, 1); 7821 7822 bind(DONE_LABEL); 7823 } // string_indexof_char 7824 7825 // helper function for string_compare 7826 void MacroAssembler::load_next_elements(Register elem1, Register elem2, Register str1, Register str2, 7827 Address::ScaleFactor scale, Address::ScaleFactor scale1, 7828 Address::ScaleFactor scale2, Register index, int ae) { 7829 if (ae == StrIntrinsicNode::LL) { 7830 load_unsigned_byte(elem1, Address(str1, index, scale, 0)); 7831 load_unsigned_byte(elem2, Address(str2, index, scale, 0)); 7832 } else if (ae == StrIntrinsicNode::UU) { 7833 load_unsigned_short(elem1, Address(str1, index, scale, 0)); 7834 load_unsigned_short(elem2, Address(str2, index, scale, 0)); 7835 } else { 7836 load_unsigned_byte(elem1, Address(str1, index, scale1, 0)); 7837 load_unsigned_short(elem2, Address(str2, index, scale2, 0)); 7838 } 7839 } 7840 7841 // Compare strings, used for char[] and byte[]. 7842 void MacroAssembler::string_compare(Register str1, Register str2, 7843 Register cnt1, Register cnt2, Register result, 7844 XMMRegister vec1, int ae) { 7845 ShortBranchVerifier sbv(this); 7846 Label LENGTH_DIFF_LABEL, POP_LABEL, DONE_LABEL, WHILE_HEAD_LABEL; 7847 Label COMPARE_WIDE_VECTORS_LOOP_FAILED; // used only _LP64 && AVX3 7848 int stride, stride2, adr_stride, adr_stride1, adr_stride2; 7849 int stride2x2 = 0x40; 7850 Address::ScaleFactor scale, scale1, scale2; 7851 7852 if (ae != StrIntrinsicNode::LL) { 7853 stride2x2 = 0x20; 7854 } 7855 7856 if (ae == StrIntrinsicNode::LU || ae == StrIntrinsicNode::UL) { 7857 shrl(cnt2, 1); 7858 } 7859 // Compute the minimum of the string lengths and the 7860 // difference of the string lengths (stack). 7861 // Do the conditional move stuff 7862 movl(result, cnt1); 7863 subl(cnt1, cnt2); 7864 push(cnt1); 7865 cmov32(Assembler::lessEqual, cnt2, result); // cnt2 = min(cnt1, cnt2) 7866 7867 // Is the minimum length zero? 7868 testl(cnt2, cnt2); 7869 jcc(Assembler::zero, LENGTH_DIFF_LABEL); 7870 if (ae == StrIntrinsicNode::LL) { 7871 // Load first bytes 7872 load_unsigned_byte(result, Address(str1, 0)); // result = str1[0] 7873 load_unsigned_byte(cnt1, Address(str2, 0)); // cnt1 = str2[0] 7874 } else if (ae == StrIntrinsicNode::UU) { 7875 // Load first characters 7876 load_unsigned_short(result, Address(str1, 0)); 7877 load_unsigned_short(cnt1, Address(str2, 0)); 7878 } else { 7879 load_unsigned_byte(result, Address(str1, 0)); 7880 load_unsigned_short(cnt1, Address(str2, 0)); 7881 } 7882 subl(result, cnt1); 7883 jcc(Assembler::notZero, POP_LABEL); 7884 7885 if (ae == StrIntrinsicNode::UU) { 7886 // Divide length by 2 to get number of chars 7887 shrl(cnt2, 1); 7888 } 7889 cmpl(cnt2, 1); 7890 jcc(Assembler::equal, LENGTH_DIFF_LABEL); 7891 7892 // Check if the strings start at the same location and setup scale and stride 7893 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 7894 cmpptr(str1, str2); 7895 jcc(Assembler::equal, LENGTH_DIFF_LABEL); 7896 if (ae == StrIntrinsicNode::LL) { 7897 scale = Address::times_1; 7898 stride = 16; 7899 } else { 7900 scale = Address::times_2; 7901 stride = 8; 7902 } 7903 } else { 7904 scale = Address::no_scale; // not used 7905 scale1 = Address::times_1; 7906 scale2 = Address::times_2; 7907 stride = 8; 7908 } 7909 7910 if (UseAVX >= 2 && UseSSE42Intrinsics) { 7911 assert(UseSSE >= 4, "SSE4 must be enabled for SSE4.2 intrinsics to be available"); 7912 Label COMPARE_WIDE_VECTORS, VECTOR_NOT_EQUAL, COMPARE_WIDE_TAIL, COMPARE_SMALL_STR; 7913 Label COMPARE_WIDE_VECTORS_LOOP, COMPARE_16_CHARS, COMPARE_INDEX_CHAR; 7914 Label COMPARE_WIDE_VECTORS_LOOP_AVX2; 7915 Label COMPARE_TAIL_LONG; 7916 Label COMPARE_WIDE_VECTORS_LOOP_AVX3; // used only _LP64 && AVX3 7917 7918 int pcmpmask = 0x19; 7919 if (ae == StrIntrinsicNode::LL) { 7920 pcmpmask &= ~0x01; 7921 } 7922 7923 // Setup to compare 16-chars (32-bytes) vectors, 7924 // start from first character again because it has aligned address. 7925 if (ae == StrIntrinsicNode::LL) { 7926 stride2 = 32; 7927 } else { 7928 stride2 = 16; 7929 } 7930 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 7931 adr_stride = stride << scale; 7932 } else { 7933 adr_stride1 = 8; //stride << scale1; 7934 adr_stride2 = 16; //stride << scale2; 7935 } 7936 7937 assert(result == rax && cnt2 == rdx && cnt1 == rcx, "pcmpestri"); 7938 // rax and rdx are used by pcmpestri as elements counters 7939 movl(result, cnt2); 7940 andl(cnt2, ~(stride2-1)); // cnt2 holds the vector count 7941 jcc(Assembler::zero, COMPARE_TAIL_LONG); 7942 7943 // fast path : compare first 2 8-char vectors. 7944 bind(COMPARE_16_CHARS); 7945 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 7946 movdqu(vec1, Address(str1, 0)); 7947 } else { 7948 pmovzxbw(vec1, Address(str1, 0)); 7949 } 7950 pcmpestri(vec1, Address(str2, 0), pcmpmask); 7951 jccb(Assembler::below, COMPARE_INDEX_CHAR); 7952 7953 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 7954 movdqu(vec1, Address(str1, adr_stride)); 7955 pcmpestri(vec1, Address(str2, adr_stride), pcmpmask); 7956 } else { 7957 pmovzxbw(vec1, Address(str1, adr_stride1)); 7958 pcmpestri(vec1, Address(str2, adr_stride2), pcmpmask); 7959 } 7960 jccb(Assembler::aboveEqual, COMPARE_WIDE_VECTORS); 7961 addl(cnt1, stride); 7962 7963 // Compare the characters at index in cnt1 7964 bind(COMPARE_INDEX_CHAR); // cnt1 has the offset of the mismatching character 7965 load_next_elements(result, cnt2, str1, str2, scale, scale1, scale2, cnt1, ae); 7966 subl(result, cnt2); 7967 jmp(POP_LABEL); 7968 7969 // Setup the registers to start vector comparison loop 7970 bind(COMPARE_WIDE_VECTORS); 7971 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 7972 lea(str1, Address(str1, result, scale)); 7973 lea(str2, Address(str2, result, scale)); 7974 } else { 7975 lea(str1, Address(str1, result, scale1)); 7976 lea(str2, Address(str2, result, scale2)); 7977 } 7978 subl(result, stride2); 7979 subl(cnt2, stride2); 7980 jcc(Assembler::zero, COMPARE_WIDE_TAIL); 7981 negptr(result); 7982 7983 // In a loop, compare 16-chars (32-bytes) at once using (vpxor+vptest) 7984 bind(COMPARE_WIDE_VECTORS_LOOP); 7985 7986 #ifdef _LP64 7987 if (VM_Version::supports_avx512vlbw()) { // trying 64 bytes fast loop 7988 cmpl(cnt2, stride2x2); 7989 jccb(Assembler::below, COMPARE_WIDE_VECTORS_LOOP_AVX2); 7990 testl(cnt2, stride2x2-1); // cnt2 holds the vector count 7991 jccb(Assembler::notZero, COMPARE_WIDE_VECTORS_LOOP_AVX2); // means we cannot subtract by 0x40 7992 7993 bind(COMPARE_WIDE_VECTORS_LOOP_AVX3); // the hottest loop 7994 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 7995 evmovdquq(vec1, Address(str1, result, scale), Assembler::AVX_512bit); 7996 evpcmpeqb(k7, vec1, Address(str2, result, scale), Assembler::AVX_512bit); // k7 == 11..11, if operands equal, otherwise k7 has some 0 7997 } else { 7998 vpmovzxbw(vec1, Address(str1, result, scale1), Assembler::AVX_512bit); 7999 evpcmpeqb(k7, vec1, Address(str2, result, scale2), Assembler::AVX_512bit); // k7 == 11..11, if operands equal, otherwise k7 has some 0 8000 } 8001 kortestql(k7, k7); 8002 jcc(Assembler::aboveEqual, COMPARE_WIDE_VECTORS_LOOP_FAILED); // miscompare 8003 addptr(result, stride2x2); // update since we already compared at this addr 8004 subl(cnt2, stride2x2); // and sub the size too 8005 jccb(Assembler::notZero, COMPARE_WIDE_VECTORS_LOOP_AVX3); 8006 8007 vpxor(vec1, vec1); 8008 jmpb(COMPARE_WIDE_TAIL); 8009 }//if (VM_Version::supports_avx512vlbw()) 8010 #endif // _LP64 8011 8012 8013 bind(COMPARE_WIDE_VECTORS_LOOP_AVX2); 8014 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 8015 vmovdqu(vec1, Address(str1, result, scale)); 8016 vpxor(vec1, Address(str2, result, scale)); 8017 } else { 8018 vpmovzxbw(vec1, Address(str1, result, scale1), Assembler::AVX_256bit); 8019 vpxor(vec1, Address(str2, result, scale2)); 8020 } 8021 vptest(vec1, vec1); 8022 jcc(Assembler::notZero, VECTOR_NOT_EQUAL); 8023 addptr(result, stride2); 8024 subl(cnt2, stride2); 8025 jccb(Assembler::notZero, COMPARE_WIDE_VECTORS_LOOP); 8026 // clean upper bits of YMM registers 8027 vpxor(vec1, vec1); 8028 8029 // compare wide vectors tail 8030 bind(COMPARE_WIDE_TAIL); 8031 testptr(result, result); 8032 jccb(Assembler::zero, LENGTH_DIFF_LABEL); 8033 8034 movl(result, stride2); 8035 movl(cnt2, result); 8036 negptr(result); 8037 jmp(COMPARE_WIDE_VECTORS_LOOP_AVX2); 8038 8039 // Identifies the mismatching (higher or lower)16-bytes in the 32-byte vectors. 8040 bind(VECTOR_NOT_EQUAL); 8041 // clean upper bits of YMM registers 8042 vpxor(vec1, vec1); 8043 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 8044 lea(str1, Address(str1, result, scale)); 8045 lea(str2, Address(str2, result, scale)); 8046 } else { 8047 lea(str1, Address(str1, result, scale1)); 8048 lea(str2, Address(str2, result, scale2)); 8049 } 8050 jmp(COMPARE_16_CHARS); 8051 8052 // Compare tail chars, length between 1 to 15 chars 8053 bind(COMPARE_TAIL_LONG); 8054 movl(cnt2, result); 8055 cmpl(cnt2, stride); 8056 jccb(Assembler::less, COMPARE_SMALL_STR); 8057 8058 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 8059 movdqu(vec1, Address(str1, 0)); 8060 } else { 8061 pmovzxbw(vec1, Address(str1, 0)); 8062 } 8063 pcmpestri(vec1, Address(str2, 0), pcmpmask); 8064 jcc(Assembler::below, COMPARE_INDEX_CHAR); 8065 subptr(cnt2, stride); 8066 jccb(Assembler::zero, LENGTH_DIFF_LABEL); 8067 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 8068 lea(str1, Address(str1, result, scale)); 8069 lea(str2, Address(str2, result, scale)); 8070 } else { 8071 lea(str1, Address(str1, result, scale1)); 8072 lea(str2, Address(str2, result, scale2)); 8073 } 8074 negptr(cnt2); 8075 jmpb(WHILE_HEAD_LABEL); 8076 8077 bind(COMPARE_SMALL_STR); 8078 } else if (UseSSE42Intrinsics) { 8079 assert(UseSSE >= 4, "SSE4 must be enabled for SSE4.2 intrinsics to be available"); 8080 Label COMPARE_WIDE_VECTORS, VECTOR_NOT_EQUAL, COMPARE_TAIL; 8081 int pcmpmask = 0x19; 8082 // Setup to compare 8-char (16-byte) vectors, 8083 // start from first character again because it has aligned address. 8084 movl(result, cnt2); 8085 andl(cnt2, ~(stride - 1)); // cnt2 holds the vector count 8086 if (ae == StrIntrinsicNode::LL) { 8087 pcmpmask &= ~0x01; 8088 } 8089 jccb(Assembler::zero, COMPARE_TAIL); 8090 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 8091 lea(str1, Address(str1, result, scale)); 8092 lea(str2, Address(str2, result, scale)); 8093 } else { 8094 lea(str1, Address(str1, result, scale1)); 8095 lea(str2, Address(str2, result, scale2)); 8096 } 8097 negptr(result); 8098 8099 // pcmpestri 8100 // inputs: 8101 // vec1- substring 8102 // rax - negative string length (elements count) 8103 // mem - scanned string 8104 // rdx - string length (elements count) 8105 // pcmpmask - cmp mode: 11000 (string compare with negated result) 8106 // + 00 (unsigned bytes) or + 01 (unsigned shorts) 8107 // outputs: 8108 // rcx - first mismatched element index 8109 assert(result == rax && cnt2 == rdx && cnt1 == rcx, "pcmpestri"); 8110 8111 bind(COMPARE_WIDE_VECTORS); 8112 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 8113 movdqu(vec1, Address(str1, result, scale)); 8114 pcmpestri(vec1, Address(str2, result, scale), pcmpmask); 8115 } else { 8116 pmovzxbw(vec1, Address(str1, result, scale1)); 8117 pcmpestri(vec1, Address(str2, result, scale2), pcmpmask); 8118 } 8119 // After pcmpestri cnt1(rcx) contains mismatched element index 8120 8121 jccb(Assembler::below, VECTOR_NOT_EQUAL); // CF==1 8122 addptr(result, stride); 8123 subptr(cnt2, stride); 8124 jccb(Assembler::notZero, COMPARE_WIDE_VECTORS); 8125 8126 // compare wide vectors tail 8127 testptr(result, result); 8128 jccb(Assembler::zero, LENGTH_DIFF_LABEL); 8129 8130 movl(cnt2, stride); 8131 movl(result, stride); 8132 negptr(result); 8133 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 8134 movdqu(vec1, Address(str1, result, scale)); 8135 pcmpestri(vec1, Address(str2, result, scale), pcmpmask); 8136 } else { 8137 pmovzxbw(vec1, Address(str1, result, scale1)); 8138 pcmpestri(vec1, Address(str2, result, scale2), pcmpmask); 8139 } 8140 jccb(Assembler::aboveEqual, LENGTH_DIFF_LABEL); 8141 8142 // Mismatched characters in the vectors 8143 bind(VECTOR_NOT_EQUAL); 8144 addptr(cnt1, result); 8145 load_next_elements(result, cnt2, str1, str2, scale, scale1, scale2, cnt1, ae); 8146 subl(result, cnt2); 8147 jmpb(POP_LABEL); 8148 8149 bind(COMPARE_TAIL); // limit is zero 8150 movl(cnt2, result); 8151 // Fallthru to tail compare 8152 } 8153 // Shift str2 and str1 to the end of the arrays, negate min 8154 if (ae == StrIntrinsicNode::LL || ae == StrIntrinsicNode::UU) { 8155 lea(str1, Address(str1, cnt2, scale)); 8156 lea(str2, Address(str2, cnt2, scale)); 8157 } else { 8158 lea(str1, Address(str1, cnt2, scale1)); 8159 lea(str2, Address(str2, cnt2, scale2)); 8160 } 8161 decrementl(cnt2); // first character was compared already 8162 negptr(cnt2); 8163 8164 // Compare the rest of the elements 8165 bind(WHILE_HEAD_LABEL); 8166 load_next_elements(result, cnt1, str1, str2, scale, scale1, scale2, cnt2, ae); 8167 subl(result, cnt1); 8168 jccb(Assembler::notZero, POP_LABEL); 8169 increment(cnt2); 8170 jccb(Assembler::notZero, WHILE_HEAD_LABEL); 8171 8172 // Strings are equal up to min length. Return the length difference. 8173 bind(LENGTH_DIFF_LABEL); 8174 pop(result); 8175 if (ae == StrIntrinsicNode::UU) { 8176 // Divide diff by 2 to get number of chars 8177 sarl(result, 1); 8178 } 8179 jmpb(DONE_LABEL); 8180 8181 #ifdef _LP64 8182 if (VM_Version::supports_avx512vlbw()) { 8183 8184 bind(COMPARE_WIDE_VECTORS_LOOP_FAILED); 8185 8186 kmovql(cnt1, k7); 8187 notq(cnt1); 8188 bsfq(cnt2, cnt1); 8189 if (ae != StrIntrinsicNode::LL) { 8190 // Divide diff by 2 to get number of chars 8191 sarl(cnt2, 1); 8192 } 8193 addq(result, cnt2); 8194 if (ae == StrIntrinsicNode::LL) { 8195 load_unsigned_byte(cnt1, Address(str2, result)); 8196 load_unsigned_byte(result, Address(str1, result)); 8197 } else if (ae == StrIntrinsicNode::UU) { 8198 load_unsigned_short(cnt1, Address(str2, result, scale)); 8199 load_unsigned_short(result, Address(str1, result, scale)); 8200 } else { 8201 load_unsigned_short(cnt1, Address(str2, result, scale2)); 8202 load_unsigned_byte(result, Address(str1, result, scale1)); 8203 } 8204 subl(result, cnt1); 8205 jmpb(POP_LABEL); 8206 }//if (VM_Version::supports_avx512vlbw()) 8207 #endif // _LP64 8208 8209 // Discard the stored length difference 8210 bind(POP_LABEL); 8211 pop(cnt1); 8212 8213 // That's it 8214 bind(DONE_LABEL); 8215 if(ae == StrIntrinsicNode::UL) { 8216 negl(result); 8217 } 8218 8219 } 8220 8221 // Search for Non-ASCII character (Negative byte value) in a byte array, 8222 // return true if it has any and false otherwise. 8223 void MacroAssembler::has_negatives(Register ary1, Register len, 8224 Register result, Register tmp1, 8225 XMMRegister vec1, XMMRegister vec2) { 8226 8227 // rsi: byte array 8228 // rcx: len 8229 // rax: result 8230 ShortBranchVerifier sbv(this); 8231 assert_different_registers(ary1, len, result, tmp1); 8232 assert_different_registers(vec1, vec2); 8233 Label TRUE_LABEL, FALSE_LABEL, DONE, COMPARE_CHAR, COMPARE_VECTORS, COMPARE_BYTE; 8234 8235 // len == 0 8236 testl(len, len); 8237 jcc(Assembler::zero, FALSE_LABEL); 8238 8239 movl(result, len); // copy 8240 8241 if (UseAVX >= 2 && UseSSE >= 2) { 8242 // With AVX2, use 32-byte vector compare 8243 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL; 8244 8245 // Compare 32-byte vectors 8246 andl(result, 0x0000001f); // tail count (in bytes) 8247 andl(len, 0xffffffe0); // vector count (in bytes) 8248 jccb(Assembler::zero, COMPARE_TAIL); 8249 8250 lea(ary1, Address(ary1, len, Address::times_1)); 8251 negptr(len); 8252 8253 movl(tmp1, 0x80808080); // create mask to test for Unicode chars in vector 8254 movdl(vec2, tmp1); 8255 vpbroadcastd(vec2, vec2); 8256 8257 bind(COMPARE_WIDE_VECTORS); 8258 vmovdqu(vec1, Address(ary1, len, Address::times_1)); 8259 vptest(vec1, vec2); 8260 jccb(Assembler::notZero, TRUE_LABEL); 8261 addptr(len, 32); 8262 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS); 8263 8264 testl(result, result); 8265 jccb(Assembler::zero, FALSE_LABEL); 8266 8267 vmovdqu(vec1, Address(ary1, result, Address::times_1, -32)); 8268 vptest(vec1, vec2); 8269 jccb(Assembler::notZero, TRUE_LABEL); 8270 jmpb(FALSE_LABEL); 8271 8272 bind(COMPARE_TAIL); // len is zero 8273 movl(len, result); 8274 // Fallthru to tail compare 8275 } else if (UseSSE42Intrinsics) { 8276 assert(UseSSE >= 4, "SSE4 must be for SSE4.2 intrinsics to be available"); 8277 // With SSE4.2, use double quad vector compare 8278 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL; 8279 8280 // Compare 16-byte vectors 8281 andl(result, 0x0000000f); // tail count (in bytes) 8282 andl(len, 0xfffffff0); // vector count (in bytes) 8283 jccb(Assembler::zero, COMPARE_TAIL); 8284 8285 lea(ary1, Address(ary1, len, Address::times_1)); 8286 negptr(len); 8287 8288 movl(tmp1, 0x80808080); 8289 movdl(vec2, tmp1); 8290 pshufd(vec2, vec2, 0); 8291 8292 bind(COMPARE_WIDE_VECTORS); 8293 movdqu(vec1, Address(ary1, len, Address::times_1)); 8294 ptest(vec1, vec2); 8295 jccb(Assembler::notZero, TRUE_LABEL); 8296 addptr(len, 16); 8297 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS); 8298 8299 testl(result, result); 8300 jccb(Assembler::zero, FALSE_LABEL); 8301 8302 movdqu(vec1, Address(ary1, result, Address::times_1, -16)); 8303 ptest(vec1, vec2); 8304 jccb(Assembler::notZero, TRUE_LABEL); 8305 jmpb(FALSE_LABEL); 8306 8307 bind(COMPARE_TAIL); // len is zero 8308 movl(len, result); 8309 // Fallthru to tail compare 8310 } 8311 8312 // Compare 4-byte vectors 8313 andl(len, 0xfffffffc); // vector count (in bytes) 8314 jccb(Assembler::zero, COMPARE_CHAR); 8315 8316 lea(ary1, Address(ary1, len, Address::times_1)); 8317 negptr(len); 8318 8319 bind(COMPARE_VECTORS); 8320 movl(tmp1, Address(ary1, len, Address::times_1)); 8321 andl(tmp1, 0x80808080); 8322 jccb(Assembler::notZero, TRUE_LABEL); 8323 addptr(len, 4); 8324 jcc(Assembler::notZero, COMPARE_VECTORS); 8325 8326 // Compare trailing char (final 2 bytes), if any 8327 bind(COMPARE_CHAR); 8328 testl(result, 0x2); // tail char 8329 jccb(Assembler::zero, COMPARE_BYTE); 8330 load_unsigned_short(tmp1, Address(ary1, 0)); 8331 andl(tmp1, 0x00008080); 8332 jccb(Assembler::notZero, TRUE_LABEL); 8333 subptr(result, 2); 8334 lea(ary1, Address(ary1, 2)); 8335 8336 bind(COMPARE_BYTE); 8337 testl(result, 0x1); // tail byte 8338 jccb(Assembler::zero, FALSE_LABEL); 8339 load_unsigned_byte(tmp1, Address(ary1, 0)); 8340 andl(tmp1, 0x00000080); 8341 jccb(Assembler::notEqual, TRUE_LABEL); 8342 jmpb(FALSE_LABEL); 8343 8344 bind(TRUE_LABEL); 8345 movl(result, 1); // return true 8346 jmpb(DONE); 8347 8348 bind(FALSE_LABEL); 8349 xorl(result, result); // return false 8350 8351 // That's it 8352 bind(DONE); 8353 if (UseAVX >= 2 && UseSSE >= 2) { 8354 // clean upper bits of YMM registers 8355 vpxor(vec1, vec1); 8356 vpxor(vec2, vec2); 8357 } 8358 } 8359 8360 // Compare char[] or byte[] arrays aligned to 4 bytes or substrings. 8361 void MacroAssembler::arrays_equals(bool is_array_equ, Register ary1, Register ary2, 8362 Register limit, Register result, Register chr, 8363 XMMRegister vec1, XMMRegister vec2, bool is_char) { 8364 ShortBranchVerifier sbv(this); 8365 Label TRUE_LABEL, FALSE_LABEL, DONE, COMPARE_VECTORS, COMPARE_CHAR, COMPARE_BYTE; 8366 8367 int length_offset = arrayOopDesc::length_offset_in_bytes(); 8368 int base_offset = arrayOopDesc::base_offset_in_bytes(is_char ? T_CHAR : T_BYTE); 8369 8370 if (is_array_equ) { 8371 // Check the input args 8372 cmpptr(ary1, ary2); 8373 jcc(Assembler::equal, TRUE_LABEL); 8374 8375 // Need additional checks for arrays_equals. 8376 testptr(ary1, ary1); 8377 jcc(Assembler::zero, FALSE_LABEL); 8378 testptr(ary2, ary2); 8379 jcc(Assembler::zero, FALSE_LABEL); 8380 8381 // Check the lengths 8382 movl(limit, Address(ary1, length_offset)); 8383 cmpl(limit, Address(ary2, length_offset)); 8384 jcc(Assembler::notEqual, FALSE_LABEL); 8385 } 8386 8387 // count == 0 8388 testl(limit, limit); 8389 jcc(Assembler::zero, TRUE_LABEL); 8390 8391 if (is_array_equ) { 8392 // Load array address 8393 lea(ary1, Address(ary1, base_offset)); 8394 lea(ary2, Address(ary2, base_offset)); 8395 } 8396 8397 if (is_array_equ && is_char) { 8398 // arrays_equals when used for char[]. 8399 shll(limit, 1); // byte count != 0 8400 } 8401 movl(result, limit); // copy 8402 8403 if (UseAVX >= 2) { 8404 // With AVX2, use 32-byte vector compare 8405 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL; 8406 8407 // Compare 32-byte vectors 8408 andl(result, 0x0000001f); // tail count (in bytes) 8409 andl(limit, 0xffffffe0); // vector count (in bytes) 8410 jcc(Assembler::zero, COMPARE_TAIL); 8411 8412 lea(ary1, Address(ary1, limit, Address::times_1)); 8413 lea(ary2, Address(ary2, limit, Address::times_1)); 8414 negptr(limit); 8415 8416 bind(COMPARE_WIDE_VECTORS); 8417 8418 #ifdef _LP64 8419 if (VM_Version::supports_avx512vlbw()) { // trying 64 bytes fast loop 8420 Label COMPARE_WIDE_VECTORS_LOOP_AVX2, COMPARE_WIDE_VECTORS_LOOP_AVX3; 8421 8422 cmpl(limit, -64); 8423 jccb(Assembler::greater, COMPARE_WIDE_VECTORS_LOOP_AVX2); 8424 8425 bind(COMPARE_WIDE_VECTORS_LOOP_AVX3); // the hottest loop 8426 8427 evmovdquq(vec1, Address(ary1, limit, Address::times_1), Assembler::AVX_512bit); 8428 evpcmpeqb(k7, vec1, Address(ary2, limit, Address::times_1), Assembler::AVX_512bit); 8429 kortestql(k7, k7); 8430 jcc(Assembler::aboveEqual, FALSE_LABEL); // miscompare 8431 addptr(limit, 64); // update since we already compared at this addr 8432 cmpl(limit, -64); 8433 jccb(Assembler::lessEqual, COMPARE_WIDE_VECTORS_LOOP_AVX3); 8434 8435 // At this point we may still need to compare -limit+result bytes. 8436 // We could execute the next two instruction and just continue via non-wide path: 8437 // cmpl(limit, 0); 8438 // jcc(Assembler::equal, COMPARE_TAIL); // true 8439 // But since we stopped at the points ary{1,2}+limit which are 8440 // not farther than 64 bytes from the ends of arrays ary{1,2}+result 8441 // (|limit| <= 32 and result < 32), 8442 // we may just compare the last 64 bytes. 8443 // 8444 addptr(result, -64); // it is safe, bc we just came from this area 8445 evmovdquq(vec1, Address(ary1, result, Address::times_1), Assembler::AVX_512bit); 8446 evpcmpeqb(k7, vec1, Address(ary2, result, Address::times_1), Assembler::AVX_512bit); 8447 kortestql(k7, k7); 8448 jcc(Assembler::aboveEqual, FALSE_LABEL); // miscompare 8449 8450 jmp(TRUE_LABEL); 8451 8452 bind(COMPARE_WIDE_VECTORS_LOOP_AVX2); 8453 8454 }//if (VM_Version::supports_avx512vlbw()) 8455 #endif //_LP64 8456 8457 vmovdqu(vec1, Address(ary1, limit, Address::times_1)); 8458 vmovdqu(vec2, Address(ary2, limit, Address::times_1)); 8459 vpxor(vec1, vec2); 8460 8461 vptest(vec1, vec1); 8462 jccb(Assembler::notZero, FALSE_LABEL); 8463 addptr(limit, 32); 8464 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS); 8465 8466 testl(result, result); 8467 jccb(Assembler::zero, TRUE_LABEL); 8468 8469 vmovdqu(vec1, Address(ary1, result, Address::times_1, -32)); 8470 vmovdqu(vec2, Address(ary2, result, Address::times_1, -32)); 8471 vpxor(vec1, vec2); 8472 8473 vptest(vec1, vec1); 8474 jccb(Assembler::notZero, FALSE_LABEL); 8475 jmpb(TRUE_LABEL); 8476 8477 bind(COMPARE_TAIL); // limit is zero 8478 movl(limit, result); 8479 // Fallthru to tail compare 8480 } else if (UseSSE42Intrinsics) { 8481 assert(UseSSE >= 4, "SSE4 must be enabled for SSE4.2 intrinsics to be available"); 8482 // With SSE4.2, use double quad vector compare 8483 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL; 8484 8485 // Compare 16-byte vectors 8486 andl(result, 0x0000000f); // tail count (in bytes) 8487 andl(limit, 0xfffffff0); // vector count (in bytes) 8488 jccb(Assembler::zero, COMPARE_TAIL); 8489 8490 lea(ary1, Address(ary1, limit, Address::times_1)); 8491 lea(ary2, Address(ary2, limit, Address::times_1)); 8492 negptr(limit); 8493 8494 bind(COMPARE_WIDE_VECTORS); 8495 movdqu(vec1, Address(ary1, limit, Address::times_1)); 8496 movdqu(vec2, Address(ary2, limit, Address::times_1)); 8497 pxor(vec1, vec2); 8498 8499 ptest(vec1, vec1); 8500 jccb(Assembler::notZero, FALSE_LABEL); 8501 addptr(limit, 16); 8502 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS); 8503 8504 testl(result, result); 8505 jccb(Assembler::zero, TRUE_LABEL); 8506 8507 movdqu(vec1, Address(ary1, result, Address::times_1, -16)); 8508 movdqu(vec2, Address(ary2, result, Address::times_1, -16)); 8509 pxor(vec1, vec2); 8510 8511 ptest(vec1, vec1); 8512 jccb(Assembler::notZero, FALSE_LABEL); 8513 jmpb(TRUE_LABEL); 8514 8515 bind(COMPARE_TAIL); // limit is zero 8516 movl(limit, result); 8517 // Fallthru to tail compare 8518 } 8519 8520 // Compare 4-byte vectors 8521 andl(limit, 0xfffffffc); // vector count (in bytes) 8522 jccb(Assembler::zero, COMPARE_CHAR); 8523 8524 lea(ary1, Address(ary1, limit, Address::times_1)); 8525 lea(ary2, Address(ary2, limit, Address::times_1)); 8526 negptr(limit); 8527 8528 bind(COMPARE_VECTORS); 8529 movl(chr, Address(ary1, limit, Address::times_1)); 8530 cmpl(chr, Address(ary2, limit, Address::times_1)); 8531 jccb(Assembler::notEqual, FALSE_LABEL); 8532 addptr(limit, 4); 8533 jcc(Assembler::notZero, COMPARE_VECTORS); 8534 8535 // Compare trailing char (final 2 bytes), if any 8536 bind(COMPARE_CHAR); 8537 testl(result, 0x2); // tail char 8538 jccb(Assembler::zero, COMPARE_BYTE); 8539 load_unsigned_short(chr, Address(ary1, 0)); 8540 load_unsigned_short(limit, Address(ary2, 0)); 8541 cmpl(chr, limit); 8542 jccb(Assembler::notEqual, FALSE_LABEL); 8543 8544 if (is_array_equ && is_char) { 8545 bind(COMPARE_BYTE); 8546 } else { 8547 lea(ary1, Address(ary1, 2)); 8548 lea(ary2, Address(ary2, 2)); 8549 8550 bind(COMPARE_BYTE); 8551 testl(result, 0x1); // tail byte 8552 jccb(Assembler::zero, TRUE_LABEL); 8553 load_unsigned_byte(chr, Address(ary1, 0)); 8554 load_unsigned_byte(limit, Address(ary2, 0)); 8555 cmpl(chr, limit); 8556 jccb(Assembler::notEqual, FALSE_LABEL); 8557 } 8558 bind(TRUE_LABEL); 8559 movl(result, 1); // return true 8560 jmpb(DONE); 8561 8562 bind(FALSE_LABEL); 8563 xorl(result, result); // return false 8564 8565 // That's it 8566 bind(DONE); 8567 if (UseAVX >= 2) { 8568 // clean upper bits of YMM registers 8569 vpxor(vec1, vec1); 8570 vpxor(vec2, vec2); 8571 } 8572 } 8573 8574 #endif 8575 8576 void MacroAssembler::generate_fill(BasicType t, bool aligned, 8577 Register to, Register value, Register count, 8578 Register rtmp, XMMRegister xtmp) { 8579 ShortBranchVerifier sbv(this); 8580 assert_different_registers(to, value, count, rtmp); 8581 Label L_exit, L_skip_align1, L_skip_align2, L_fill_byte; 8582 Label L_fill_2_bytes, L_fill_4_bytes; 8583 8584 int shift = -1; 8585 switch (t) { 8586 case T_BYTE: 8587 shift = 2; 8588 break; 8589 case T_SHORT: 8590 shift = 1; 8591 break; 8592 case T_INT: 8593 shift = 0; 8594 break; 8595 default: ShouldNotReachHere(); 8596 } 8597 8598 if (t == T_BYTE) { 8599 andl(value, 0xff); 8600 movl(rtmp, value); 8601 shll(rtmp, 8); 8602 orl(value, rtmp); 8603 } 8604 if (t == T_SHORT) { 8605 andl(value, 0xffff); 8606 } 8607 if (t == T_BYTE || t == T_SHORT) { 8608 movl(rtmp, value); 8609 shll(rtmp, 16); 8610 orl(value, rtmp); 8611 } 8612 8613 cmpl(count, 2<<shift); // Short arrays (< 8 bytes) fill by element 8614 jcc(Assembler::below, L_fill_4_bytes); // use unsigned cmp 8615 if (!UseUnalignedLoadStores && !aligned && (t == T_BYTE || t == T_SHORT)) { 8616 // align source address at 4 bytes address boundary 8617 if (t == T_BYTE) { 8618 // One byte misalignment happens only for byte arrays 8619 testptr(to, 1); 8620 jccb(Assembler::zero, L_skip_align1); 8621 movb(Address(to, 0), value); 8622 increment(to); 8623 decrement(count); 8624 BIND(L_skip_align1); 8625 } 8626 // Two bytes misalignment happens only for byte and short (char) arrays 8627 testptr(to, 2); 8628 jccb(Assembler::zero, L_skip_align2); 8629 movw(Address(to, 0), value); 8630 addptr(to, 2); 8631 subl(count, 1<<(shift-1)); 8632 BIND(L_skip_align2); 8633 } 8634 if (UseSSE < 2) { 8635 Label L_fill_32_bytes_loop, L_check_fill_8_bytes, L_fill_8_bytes_loop, L_fill_8_bytes; 8636 // Fill 32-byte chunks 8637 subl(count, 8 << shift); 8638 jcc(Assembler::less, L_check_fill_8_bytes); 8639 align(16); 8640 8641 BIND(L_fill_32_bytes_loop); 8642 8643 for (int i = 0; i < 32; i += 4) { 8644 movl(Address(to, i), value); 8645 } 8646 8647 addptr(to, 32); 8648 subl(count, 8 << shift); 8649 jcc(Assembler::greaterEqual, L_fill_32_bytes_loop); 8650 BIND(L_check_fill_8_bytes); 8651 addl(count, 8 << shift); 8652 jccb(Assembler::zero, L_exit); 8653 jmpb(L_fill_8_bytes); 8654 8655 // 8656 // length is too short, just fill qwords 8657 // 8658 BIND(L_fill_8_bytes_loop); 8659 movl(Address(to, 0), value); 8660 movl(Address(to, 4), value); 8661 addptr(to, 8); 8662 BIND(L_fill_8_bytes); 8663 subl(count, 1 << (shift + 1)); 8664 jcc(Assembler::greaterEqual, L_fill_8_bytes_loop); 8665 // fall through to fill 4 bytes 8666 } else { 8667 Label L_fill_32_bytes; 8668 if (!UseUnalignedLoadStores) { 8669 // align to 8 bytes, we know we are 4 byte aligned to start 8670 testptr(to, 4); 8671 jccb(Assembler::zero, L_fill_32_bytes); 8672 movl(Address(to, 0), value); 8673 addptr(to, 4); 8674 subl(count, 1<<shift); 8675 } 8676 BIND(L_fill_32_bytes); 8677 { 8678 assert( UseSSE >= 2, "supported cpu only" ); 8679 Label L_fill_32_bytes_loop, L_check_fill_8_bytes, L_fill_8_bytes_loop, L_fill_8_bytes; 8680 if (UseAVX > 2) { 8681 movl(rtmp, 0xffff); 8682 kmovwl(k1, rtmp); 8683 } 8684 movdl(xtmp, value); 8685 if (UseAVX > 2 && UseUnalignedLoadStores) { 8686 // Fill 64-byte chunks 8687 Label L_fill_64_bytes_loop, L_check_fill_32_bytes; 8688 evpbroadcastd(xtmp, xtmp, Assembler::AVX_512bit); 8689 8690 subl(count, 16 << shift); 8691 jcc(Assembler::less, L_check_fill_32_bytes); 8692 align(16); 8693 8694 BIND(L_fill_64_bytes_loop); 8695 evmovdqul(Address(to, 0), xtmp, Assembler::AVX_512bit); 8696 addptr(to, 64); 8697 subl(count, 16 << shift); 8698 jcc(Assembler::greaterEqual, L_fill_64_bytes_loop); 8699 8700 BIND(L_check_fill_32_bytes); 8701 addl(count, 8 << shift); 8702 jccb(Assembler::less, L_check_fill_8_bytes); 8703 vmovdqu(Address(to, 0), xtmp); 8704 addptr(to, 32); 8705 subl(count, 8 << shift); 8706 8707 BIND(L_check_fill_8_bytes); 8708 } else if (UseAVX == 2 && UseUnalignedLoadStores) { 8709 // Fill 64-byte chunks 8710 Label L_fill_64_bytes_loop, L_check_fill_32_bytes; 8711 vpbroadcastd(xtmp, xtmp); 8712 8713 subl(count, 16 << shift); 8714 jcc(Assembler::less, L_check_fill_32_bytes); 8715 align(16); 8716 8717 BIND(L_fill_64_bytes_loop); 8718 vmovdqu(Address(to, 0), xtmp); 8719 vmovdqu(Address(to, 32), xtmp); 8720 addptr(to, 64); 8721 subl(count, 16 << shift); 8722 jcc(Assembler::greaterEqual, L_fill_64_bytes_loop); 8723 8724 BIND(L_check_fill_32_bytes); 8725 addl(count, 8 << shift); 8726 jccb(Assembler::less, L_check_fill_8_bytes); 8727 vmovdqu(Address(to, 0), xtmp); 8728 addptr(to, 32); 8729 subl(count, 8 << shift); 8730 8731 BIND(L_check_fill_8_bytes); 8732 // clean upper bits of YMM registers 8733 movdl(xtmp, value); 8734 pshufd(xtmp, xtmp, 0); 8735 } else { 8736 // Fill 32-byte chunks 8737 pshufd(xtmp, xtmp, 0); 8738 8739 subl(count, 8 << shift); 8740 jcc(Assembler::less, L_check_fill_8_bytes); 8741 align(16); 8742 8743 BIND(L_fill_32_bytes_loop); 8744 8745 if (UseUnalignedLoadStores) { 8746 movdqu(Address(to, 0), xtmp); 8747 movdqu(Address(to, 16), xtmp); 8748 } else { 8749 movq(Address(to, 0), xtmp); 8750 movq(Address(to, 8), xtmp); 8751 movq(Address(to, 16), xtmp); 8752 movq(Address(to, 24), xtmp); 8753 } 8754 8755 addptr(to, 32); 8756 subl(count, 8 << shift); 8757 jcc(Assembler::greaterEqual, L_fill_32_bytes_loop); 8758 8759 BIND(L_check_fill_8_bytes); 8760 } 8761 addl(count, 8 << shift); 8762 jccb(Assembler::zero, L_exit); 8763 jmpb(L_fill_8_bytes); 8764 8765 // 8766 // length is too short, just fill qwords 8767 // 8768 BIND(L_fill_8_bytes_loop); 8769 movq(Address(to, 0), xtmp); 8770 addptr(to, 8); 8771 BIND(L_fill_8_bytes); 8772 subl(count, 1 << (shift + 1)); 8773 jcc(Assembler::greaterEqual, L_fill_8_bytes_loop); 8774 } 8775 } 8776 // fill trailing 4 bytes 8777 BIND(L_fill_4_bytes); 8778 testl(count, 1<<shift); 8779 jccb(Assembler::zero, L_fill_2_bytes); 8780 movl(Address(to, 0), value); 8781 if (t == T_BYTE || t == T_SHORT) { 8782 addptr(to, 4); 8783 BIND(L_fill_2_bytes); 8784 // fill trailing 2 bytes 8785 testl(count, 1<<(shift-1)); 8786 jccb(Assembler::zero, L_fill_byte); 8787 movw(Address(to, 0), value); 8788 if (t == T_BYTE) { 8789 addptr(to, 2); 8790 BIND(L_fill_byte); 8791 // fill trailing byte 8792 testl(count, 1); 8793 jccb(Assembler::zero, L_exit); 8794 movb(Address(to, 0), value); 8795 } else { 8796 BIND(L_fill_byte); 8797 } 8798 } else { 8799 BIND(L_fill_2_bytes); 8800 } 8801 BIND(L_exit); 8802 } 8803 8804 // encode char[] to byte[] in ISO_8859_1 8805 void MacroAssembler::encode_iso_array(Register src, Register dst, Register len, 8806 XMMRegister tmp1Reg, XMMRegister tmp2Reg, 8807 XMMRegister tmp3Reg, XMMRegister tmp4Reg, 8808 Register tmp5, Register result) { 8809 // rsi: src 8810 // rdi: dst 8811 // rdx: len 8812 // rcx: tmp5 8813 // rax: result 8814 ShortBranchVerifier sbv(this); 8815 assert_different_registers(src, dst, len, tmp5, result); 8816 Label L_done, L_copy_1_char, L_copy_1_char_exit; 8817 8818 // set result 8819 xorl(result, result); 8820 // check for zero length 8821 testl(len, len); 8822 jcc(Assembler::zero, L_done); 8823 movl(result, len); 8824 8825 // Setup pointers 8826 lea(src, Address(src, len, Address::times_2)); // char[] 8827 lea(dst, Address(dst, len, Address::times_1)); // byte[] 8828 negptr(len); 8829 8830 if (UseSSE42Intrinsics || UseAVX >= 2) { 8831 assert(UseSSE42Intrinsics ? UseSSE >= 4 : true, "SSE4 must be enabled for SSE4.2 intrinsics to be available"); 8832 Label L_chars_8_check, L_copy_8_chars, L_copy_8_chars_exit; 8833 Label L_chars_16_check, L_copy_16_chars, L_copy_16_chars_exit; 8834 8835 if (UseAVX >= 2) { 8836 Label L_chars_32_check, L_copy_32_chars, L_copy_32_chars_exit; 8837 movl(tmp5, 0xff00ff00); // create mask to test for Unicode chars in vector 8838 movdl(tmp1Reg, tmp5); 8839 vpbroadcastd(tmp1Reg, tmp1Reg); 8840 jmpb(L_chars_32_check); 8841 8842 bind(L_copy_32_chars); 8843 vmovdqu(tmp3Reg, Address(src, len, Address::times_2, -64)); 8844 vmovdqu(tmp4Reg, Address(src, len, Address::times_2, -32)); 8845 vpor(tmp2Reg, tmp3Reg, tmp4Reg, /* vector_len */ 1); 8846 vptest(tmp2Reg, tmp1Reg); // check for Unicode chars in vector 8847 jccb(Assembler::notZero, L_copy_32_chars_exit); 8848 vpackuswb(tmp3Reg, tmp3Reg, tmp4Reg, /* vector_len */ 1); 8849 vpermq(tmp4Reg, tmp3Reg, 0xD8, /* vector_len */ 1); 8850 vmovdqu(Address(dst, len, Address::times_1, -32), tmp4Reg); 8851 8852 bind(L_chars_32_check); 8853 addptr(len, 32); 8854 jccb(Assembler::lessEqual, L_copy_32_chars); 8855 8856 bind(L_copy_32_chars_exit); 8857 subptr(len, 16); 8858 jccb(Assembler::greater, L_copy_16_chars_exit); 8859 8860 } else if (UseSSE42Intrinsics) { 8861 movl(tmp5, 0xff00ff00); // create mask to test for Unicode chars in vector 8862 movdl(tmp1Reg, tmp5); 8863 pshufd(tmp1Reg, tmp1Reg, 0); 8864 jmpb(L_chars_16_check); 8865 } 8866 8867 bind(L_copy_16_chars); 8868 if (UseAVX >= 2) { 8869 vmovdqu(tmp2Reg, Address(src, len, Address::times_2, -32)); 8870 vptest(tmp2Reg, tmp1Reg); 8871 jccb(Assembler::notZero, L_copy_16_chars_exit); 8872 vpackuswb(tmp2Reg, tmp2Reg, tmp1Reg, /* vector_len */ 1); 8873 vpermq(tmp3Reg, tmp2Reg, 0xD8, /* vector_len */ 1); 8874 } else { 8875 if (UseAVX > 0) { 8876 movdqu(tmp3Reg, Address(src, len, Address::times_2, -32)); 8877 movdqu(tmp4Reg, Address(src, len, Address::times_2, -16)); 8878 vpor(tmp2Reg, tmp3Reg, tmp4Reg, /* vector_len */ 0); 8879 } else { 8880 movdqu(tmp3Reg, Address(src, len, Address::times_2, -32)); 8881 por(tmp2Reg, tmp3Reg); 8882 movdqu(tmp4Reg, Address(src, len, Address::times_2, -16)); 8883 por(tmp2Reg, tmp4Reg); 8884 } 8885 ptest(tmp2Reg, tmp1Reg); // check for Unicode chars in vector 8886 jccb(Assembler::notZero, L_copy_16_chars_exit); 8887 packuswb(tmp3Reg, tmp4Reg); 8888 } 8889 movdqu(Address(dst, len, Address::times_1, -16), tmp3Reg); 8890 8891 bind(L_chars_16_check); 8892 addptr(len, 16); 8893 jccb(Assembler::lessEqual, L_copy_16_chars); 8894 8895 bind(L_copy_16_chars_exit); 8896 if (UseAVX >= 2) { 8897 // clean upper bits of YMM registers 8898 vpxor(tmp2Reg, tmp2Reg); 8899 vpxor(tmp3Reg, tmp3Reg); 8900 vpxor(tmp4Reg, tmp4Reg); 8901 movdl(tmp1Reg, tmp5); 8902 pshufd(tmp1Reg, tmp1Reg, 0); 8903 } 8904 subptr(len, 8); 8905 jccb(Assembler::greater, L_copy_8_chars_exit); 8906 8907 bind(L_copy_8_chars); 8908 movdqu(tmp3Reg, Address(src, len, Address::times_2, -16)); 8909 ptest(tmp3Reg, tmp1Reg); 8910 jccb(Assembler::notZero, L_copy_8_chars_exit); 8911 packuswb(tmp3Reg, tmp1Reg); 8912 movq(Address(dst, len, Address::times_1, -8), tmp3Reg); 8913 addptr(len, 8); 8914 jccb(Assembler::lessEqual, L_copy_8_chars); 8915 8916 bind(L_copy_8_chars_exit); 8917 subptr(len, 8); 8918 jccb(Assembler::zero, L_done); 8919 } 8920 8921 bind(L_copy_1_char); 8922 load_unsigned_short(tmp5, Address(src, len, Address::times_2, 0)); 8923 testl(tmp5, 0xff00); // check if Unicode char 8924 jccb(Assembler::notZero, L_copy_1_char_exit); 8925 movb(Address(dst, len, Address::times_1, 0), tmp5); 8926 addptr(len, 1); 8927 jccb(Assembler::less, L_copy_1_char); 8928 8929 bind(L_copy_1_char_exit); 8930 addptr(result, len); // len is negative count of not processed elements 8931 bind(L_done); 8932 } 8933 8934 #ifdef _LP64 8935 /** 8936 * Helper for multiply_to_len(). 8937 */ 8938 void MacroAssembler::add2_with_carry(Register dest_hi, Register dest_lo, Register src1, Register src2) { 8939 addq(dest_lo, src1); 8940 adcq(dest_hi, 0); 8941 addq(dest_lo, src2); 8942 adcq(dest_hi, 0); 8943 } 8944 8945 /** 8946 * Multiply 64 bit by 64 bit first loop. 8947 */ 8948 void MacroAssembler::multiply_64_x_64_loop(Register x, Register xstart, Register x_xstart, 8949 Register y, Register y_idx, Register z, 8950 Register carry, Register product, 8951 Register idx, Register kdx) { 8952 // 8953 // jlong carry, x[], y[], z[]; 8954 // for (int idx=ystart, kdx=ystart+1+xstart; idx >= 0; idx-, kdx--) { 8955 // huge_128 product = y[idx] * x[xstart] + carry; 8956 // z[kdx] = (jlong)product; 8957 // carry = (jlong)(product >>> 64); 8958 // } 8959 // z[xstart] = carry; 8960 // 8961 8962 Label L_first_loop, L_first_loop_exit; 8963 Label L_one_x, L_one_y, L_multiply; 8964 8965 decrementl(xstart); 8966 jcc(Assembler::negative, L_one_x); 8967 8968 movq(x_xstart, Address(x, xstart, Address::times_4, 0)); 8969 rorq(x_xstart, 32); // convert big-endian to little-endian 8970 8971 bind(L_first_loop); 8972 decrementl(idx); 8973 jcc(Assembler::negative, L_first_loop_exit); 8974 decrementl(idx); 8975 jcc(Assembler::negative, L_one_y); 8976 movq(y_idx, Address(y, idx, Address::times_4, 0)); 8977 rorq(y_idx, 32); // convert big-endian to little-endian 8978 bind(L_multiply); 8979 movq(product, x_xstart); 8980 mulq(y_idx); // product(rax) * y_idx -> rdx:rax 8981 addq(product, carry); 8982 adcq(rdx, 0); 8983 subl(kdx, 2); 8984 movl(Address(z, kdx, Address::times_4, 4), product); 8985 shrq(product, 32); 8986 movl(Address(z, kdx, Address::times_4, 0), product); 8987 movq(carry, rdx); 8988 jmp(L_first_loop); 8989 8990 bind(L_one_y); 8991 movl(y_idx, Address(y, 0)); 8992 jmp(L_multiply); 8993 8994 bind(L_one_x); 8995 movl(x_xstart, Address(x, 0)); 8996 jmp(L_first_loop); 8997 8998 bind(L_first_loop_exit); 8999 } 9000 9001 /** 9002 * Multiply 64 bit by 64 bit and add 128 bit. 9003 */ 9004 void MacroAssembler::multiply_add_128_x_128(Register x_xstart, Register y, Register z, 9005 Register yz_idx, Register idx, 9006 Register carry, Register product, int offset) { 9007 // huge_128 product = (y[idx] * x_xstart) + z[kdx] + carry; 9008 // z[kdx] = (jlong)product; 9009 9010 movq(yz_idx, Address(y, idx, Address::times_4, offset)); 9011 rorq(yz_idx, 32); // convert big-endian to little-endian 9012 movq(product, x_xstart); 9013 mulq(yz_idx); // product(rax) * yz_idx -> rdx:product(rax) 9014 movq(yz_idx, Address(z, idx, Address::times_4, offset)); 9015 rorq(yz_idx, 32); // convert big-endian to little-endian 9016 9017 add2_with_carry(rdx, product, carry, yz_idx); 9018 9019 movl(Address(z, idx, Address::times_4, offset+4), product); 9020 shrq(product, 32); 9021 movl(Address(z, idx, Address::times_4, offset), product); 9022 9023 } 9024 9025 /** 9026 * Multiply 128 bit by 128 bit. Unrolled inner loop. 9027 */ 9028 void MacroAssembler::multiply_128_x_128_loop(Register x_xstart, Register y, Register z, 9029 Register yz_idx, Register idx, Register jdx, 9030 Register carry, Register product, 9031 Register carry2) { 9032 // jlong carry, x[], y[], z[]; 9033 // int kdx = ystart+1; 9034 // for (int idx=ystart-2; idx >= 0; idx -= 2) { // Third loop 9035 // huge_128 product = (y[idx+1] * x_xstart) + z[kdx+idx+1] + carry; 9036 // z[kdx+idx+1] = (jlong)product; 9037 // jlong carry2 = (jlong)(product >>> 64); 9038 // product = (y[idx] * x_xstart) + z[kdx+idx] + carry2; 9039 // z[kdx+idx] = (jlong)product; 9040 // carry = (jlong)(product >>> 64); 9041 // } 9042 // idx += 2; 9043 // if (idx > 0) { 9044 // product = (y[idx] * x_xstart) + z[kdx+idx] + carry; 9045 // z[kdx+idx] = (jlong)product; 9046 // carry = (jlong)(product >>> 64); 9047 // } 9048 // 9049 9050 Label L_third_loop, L_third_loop_exit, L_post_third_loop_done; 9051 9052 movl(jdx, idx); 9053 andl(jdx, 0xFFFFFFFC); 9054 shrl(jdx, 2); 9055 9056 bind(L_third_loop); 9057 subl(jdx, 1); 9058 jcc(Assembler::negative, L_third_loop_exit); 9059 subl(idx, 4); 9060 9061 multiply_add_128_x_128(x_xstart, y, z, yz_idx, idx, carry, product, 8); 9062 movq(carry2, rdx); 9063 9064 multiply_add_128_x_128(x_xstart, y, z, yz_idx, idx, carry2, product, 0); 9065 movq(carry, rdx); 9066 jmp(L_third_loop); 9067 9068 bind (L_third_loop_exit); 9069 9070 andl (idx, 0x3); 9071 jcc(Assembler::zero, L_post_third_loop_done); 9072 9073 Label L_check_1; 9074 subl(idx, 2); 9075 jcc(Assembler::negative, L_check_1); 9076 9077 multiply_add_128_x_128(x_xstart, y, z, yz_idx, idx, carry, product, 0); 9078 movq(carry, rdx); 9079 9080 bind (L_check_1); 9081 addl (idx, 0x2); 9082 andl (idx, 0x1); 9083 subl(idx, 1); 9084 jcc(Assembler::negative, L_post_third_loop_done); 9085 9086 movl(yz_idx, Address(y, idx, Address::times_4, 0)); 9087 movq(product, x_xstart); 9088 mulq(yz_idx); // product(rax) * yz_idx -> rdx:product(rax) 9089 movl(yz_idx, Address(z, idx, Address::times_4, 0)); 9090 9091 add2_with_carry(rdx, product, yz_idx, carry); 9092 9093 movl(Address(z, idx, Address::times_4, 0), product); 9094 shrq(product, 32); 9095 9096 shlq(rdx, 32); 9097 orq(product, rdx); 9098 movq(carry, product); 9099 9100 bind(L_post_third_loop_done); 9101 } 9102 9103 /** 9104 * Multiply 128 bit by 128 bit using BMI2. Unrolled inner loop. 9105 * 9106 */ 9107 void MacroAssembler::multiply_128_x_128_bmi2_loop(Register y, Register z, 9108 Register carry, Register carry2, 9109 Register idx, Register jdx, 9110 Register yz_idx1, Register yz_idx2, 9111 Register tmp, Register tmp3, Register tmp4) { 9112 assert(UseBMI2Instructions, "should be used only when BMI2 is available"); 9113 9114 // jlong carry, x[], y[], z[]; 9115 // int kdx = ystart+1; 9116 // for (int idx=ystart-2; idx >= 0; idx -= 2) { // Third loop 9117 // huge_128 tmp3 = (y[idx+1] * rdx) + z[kdx+idx+1] + carry; 9118 // jlong carry2 = (jlong)(tmp3 >>> 64); 9119 // huge_128 tmp4 = (y[idx] * rdx) + z[kdx+idx] + carry2; 9120 // carry = (jlong)(tmp4 >>> 64); 9121 // z[kdx+idx+1] = (jlong)tmp3; 9122 // z[kdx+idx] = (jlong)tmp4; 9123 // } 9124 // idx += 2; 9125 // if (idx > 0) { 9126 // yz_idx1 = (y[idx] * rdx) + z[kdx+idx] + carry; 9127 // z[kdx+idx] = (jlong)yz_idx1; 9128 // carry = (jlong)(yz_idx1 >>> 64); 9129 // } 9130 // 9131 9132 Label L_third_loop, L_third_loop_exit, L_post_third_loop_done; 9133 9134 movl(jdx, idx); 9135 andl(jdx, 0xFFFFFFFC); 9136 shrl(jdx, 2); 9137 9138 bind(L_third_loop); 9139 subl(jdx, 1); 9140 jcc(Assembler::negative, L_third_loop_exit); 9141 subl(idx, 4); 9142 9143 movq(yz_idx1, Address(y, idx, Address::times_4, 8)); 9144 rorxq(yz_idx1, yz_idx1, 32); // convert big-endian to little-endian 9145 movq(yz_idx2, Address(y, idx, Address::times_4, 0)); 9146 rorxq(yz_idx2, yz_idx2, 32); 9147 9148 mulxq(tmp4, tmp3, yz_idx1); // yz_idx1 * rdx -> tmp4:tmp3 9149 mulxq(carry2, tmp, yz_idx2); // yz_idx2 * rdx -> carry2:tmp 9150 9151 movq(yz_idx1, Address(z, idx, Address::times_4, 8)); 9152 rorxq(yz_idx1, yz_idx1, 32); 9153 movq(yz_idx2, Address(z, idx, Address::times_4, 0)); 9154 rorxq(yz_idx2, yz_idx2, 32); 9155 9156 if (VM_Version::supports_adx()) { 9157 adcxq(tmp3, carry); 9158 adoxq(tmp3, yz_idx1); 9159 9160 adcxq(tmp4, tmp); 9161 adoxq(tmp4, yz_idx2); 9162 9163 movl(carry, 0); // does not affect flags 9164 adcxq(carry2, carry); 9165 adoxq(carry2, carry); 9166 } else { 9167 add2_with_carry(tmp4, tmp3, carry, yz_idx1); 9168 add2_with_carry(carry2, tmp4, tmp, yz_idx2); 9169 } 9170 movq(carry, carry2); 9171 9172 movl(Address(z, idx, Address::times_4, 12), tmp3); 9173 shrq(tmp3, 32); 9174 movl(Address(z, idx, Address::times_4, 8), tmp3); 9175 9176 movl(Address(z, idx, Address::times_4, 4), tmp4); 9177 shrq(tmp4, 32); 9178 movl(Address(z, idx, Address::times_4, 0), tmp4); 9179 9180 jmp(L_third_loop); 9181 9182 bind (L_third_loop_exit); 9183 9184 andl (idx, 0x3); 9185 jcc(Assembler::zero, L_post_third_loop_done); 9186 9187 Label L_check_1; 9188 subl(idx, 2); 9189 jcc(Assembler::negative, L_check_1); 9190 9191 movq(yz_idx1, Address(y, idx, Address::times_4, 0)); 9192 rorxq(yz_idx1, yz_idx1, 32); 9193 mulxq(tmp4, tmp3, yz_idx1); // yz_idx1 * rdx -> tmp4:tmp3 9194 movq(yz_idx2, Address(z, idx, Address::times_4, 0)); 9195 rorxq(yz_idx2, yz_idx2, 32); 9196 9197 add2_with_carry(tmp4, tmp3, carry, yz_idx2); 9198 9199 movl(Address(z, idx, Address::times_4, 4), tmp3); 9200 shrq(tmp3, 32); 9201 movl(Address(z, idx, Address::times_4, 0), tmp3); 9202 movq(carry, tmp4); 9203 9204 bind (L_check_1); 9205 addl (idx, 0x2); 9206 andl (idx, 0x1); 9207 subl(idx, 1); 9208 jcc(Assembler::negative, L_post_third_loop_done); 9209 movl(tmp4, Address(y, idx, Address::times_4, 0)); 9210 mulxq(carry2, tmp3, tmp4); // tmp4 * rdx -> carry2:tmp3 9211 movl(tmp4, Address(z, idx, Address::times_4, 0)); 9212 9213 add2_with_carry(carry2, tmp3, tmp4, carry); 9214 9215 movl(Address(z, idx, Address::times_4, 0), tmp3); 9216 shrq(tmp3, 32); 9217 9218 shlq(carry2, 32); 9219 orq(tmp3, carry2); 9220 movq(carry, tmp3); 9221 9222 bind(L_post_third_loop_done); 9223 } 9224 9225 /** 9226 * Code for BigInteger::multiplyToLen() instrinsic. 9227 * 9228 * rdi: x 9229 * rax: xlen 9230 * rsi: y 9231 * rcx: ylen 9232 * r8: z 9233 * r11: zlen 9234 * r12: tmp1 9235 * r13: tmp2 9236 * r14: tmp3 9237 * r15: tmp4 9238 * rbx: tmp5 9239 * 9240 */ 9241 void MacroAssembler::multiply_to_len(Register x, Register xlen, Register y, Register ylen, Register z, Register zlen, 9242 Register tmp1, Register tmp2, Register tmp3, Register tmp4, Register tmp5) { 9243 ShortBranchVerifier sbv(this); 9244 assert_different_registers(x, xlen, y, ylen, z, zlen, tmp1, tmp2, tmp3, tmp4, tmp5, rdx); 9245 9246 push(tmp1); 9247 push(tmp2); 9248 push(tmp3); 9249 push(tmp4); 9250 push(tmp5); 9251 9252 push(xlen); 9253 push(zlen); 9254 9255 const Register idx = tmp1; 9256 const Register kdx = tmp2; 9257 const Register xstart = tmp3; 9258 9259 const Register y_idx = tmp4; 9260 const Register carry = tmp5; 9261 const Register product = xlen; 9262 const Register x_xstart = zlen; // reuse register 9263 9264 // First Loop. 9265 // 9266 // final static long LONG_MASK = 0xffffffffL; 9267 // int xstart = xlen - 1; 9268 // int ystart = ylen - 1; 9269 // long carry = 0; 9270 // for (int idx=ystart, kdx=ystart+1+xstart; idx >= 0; idx-, kdx--) { 9271 // long product = (y[idx] & LONG_MASK) * (x[xstart] & LONG_MASK) + carry; 9272 // z[kdx] = (int)product; 9273 // carry = product >>> 32; 9274 // } 9275 // z[xstart] = (int)carry; 9276 // 9277 9278 movl(idx, ylen); // idx = ylen; 9279 movl(kdx, zlen); // kdx = xlen+ylen; 9280 xorq(carry, carry); // carry = 0; 9281 9282 Label L_done; 9283 9284 movl(xstart, xlen); 9285 decrementl(xstart); 9286 jcc(Assembler::negative, L_done); 9287 9288 multiply_64_x_64_loop(x, xstart, x_xstart, y, y_idx, z, carry, product, idx, kdx); 9289 9290 Label L_second_loop; 9291 testl(kdx, kdx); 9292 jcc(Assembler::zero, L_second_loop); 9293 9294 Label L_carry; 9295 subl(kdx, 1); 9296 jcc(Assembler::zero, L_carry); 9297 9298 movl(Address(z, kdx, Address::times_4, 0), carry); 9299 shrq(carry, 32); 9300 subl(kdx, 1); 9301 9302 bind(L_carry); 9303 movl(Address(z, kdx, Address::times_4, 0), carry); 9304 9305 // Second and third (nested) loops. 9306 // 9307 // for (int i = xstart-1; i >= 0; i--) { // Second loop 9308 // carry = 0; 9309 // for (int jdx=ystart, k=ystart+1+i; jdx >= 0; jdx--, k--) { // Third loop 9310 // long product = (y[jdx] & LONG_MASK) * (x[i] & LONG_MASK) + 9311 // (z[k] & LONG_MASK) + carry; 9312 // z[k] = (int)product; 9313 // carry = product >>> 32; 9314 // } 9315 // z[i] = (int)carry; 9316 // } 9317 // 9318 // i = xlen, j = tmp1, k = tmp2, carry = tmp5, x[i] = rdx 9319 9320 const Register jdx = tmp1; 9321 9322 bind(L_second_loop); 9323 xorl(carry, carry); // carry = 0; 9324 movl(jdx, ylen); // j = ystart+1 9325 9326 subl(xstart, 1); // i = xstart-1; 9327 jcc(Assembler::negative, L_done); 9328 9329 push (z); 9330 9331 Label L_last_x; 9332 lea(z, Address(z, xstart, Address::times_4, 4)); // z = z + k - j 9333 subl(xstart, 1); // i = xstart-1; 9334 jcc(Assembler::negative, L_last_x); 9335 9336 if (UseBMI2Instructions) { 9337 movq(rdx, Address(x, xstart, Address::times_4, 0)); 9338 rorxq(rdx, rdx, 32); // convert big-endian to little-endian 9339 } else { 9340 movq(x_xstart, Address(x, xstart, Address::times_4, 0)); 9341 rorq(x_xstart, 32); // convert big-endian to little-endian 9342 } 9343 9344 Label L_third_loop_prologue; 9345 bind(L_third_loop_prologue); 9346 9347 push (x); 9348 push (xstart); 9349 push (ylen); 9350 9351 9352 if (UseBMI2Instructions) { 9353 multiply_128_x_128_bmi2_loop(y, z, carry, x, jdx, ylen, product, tmp2, x_xstart, tmp3, tmp4); 9354 } else { // !UseBMI2Instructions 9355 multiply_128_x_128_loop(x_xstart, y, z, y_idx, jdx, ylen, carry, product, x); 9356 } 9357 9358 pop(ylen); 9359 pop(xlen); 9360 pop(x); 9361 pop(z); 9362 9363 movl(tmp3, xlen); 9364 addl(tmp3, 1); 9365 movl(Address(z, tmp3, Address::times_4, 0), carry); 9366 subl(tmp3, 1); 9367 jccb(Assembler::negative, L_done); 9368 9369 shrq(carry, 32); 9370 movl(Address(z, tmp3, Address::times_4, 0), carry); 9371 jmp(L_second_loop); 9372 9373 // Next infrequent code is moved outside loops. 9374 bind(L_last_x); 9375 if (UseBMI2Instructions) { 9376 movl(rdx, Address(x, 0)); 9377 } else { 9378 movl(x_xstart, Address(x, 0)); 9379 } 9380 jmp(L_third_loop_prologue); 9381 9382 bind(L_done); 9383 9384 pop(zlen); 9385 pop(xlen); 9386 9387 pop(tmp5); 9388 pop(tmp4); 9389 pop(tmp3); 9390 pop(tmp2); 9391 pop(tmp1); 9392 } 9393 9394 void MacroAssembler::vectorized_mismatch(Register obja, Register objb, Register length, Register log2_array_indxscale, 9395 Register result, Register tmp1, Register tmp2, XMMRegister rymm0, XMMRegister rymm1, XMMRegister rymm2){ 9396 assert(UseSSE42Intrinsics, "SSE4.2 must be enabled."); 9397 Label VECTOR32_LOOP, VECTOR16_LOOP, VECTOR8_LOOP, VECTOR4_LOOP; 9398 Label VECTOR16_TAIL, VECTOR8_TAIL, VECTOR4_TAIL; 9399 Label VECTOR32_NOT_EQUAL, VECTOR16_NOT_EQUAL, VECTOR8_NOT_EQUAL, VECTOR4_NOT_EQUAL; 9400 Label SAME_TILL_END, DONE; 9401 Label BYTES_LOOP, BYTES_TAIL, BYTES_NOT_EQUAL; 9402 9403 //scale is in rcx in both Win64 and Unix 9404 ShortBranchVerifier sbv(this); 9405 9406 shlq(length); 9407 xorq(result, result); 9408 9409 cmpq(length, 8); 9410 jcc(Assembler::equal, VECTOR8_LOOP); 9411 jcc(Assembler::less, VECTOR4_TAIL); 9412 9413 if (UseAVX >= 2){ 9414 9415 cmpq(length, 16); 9416 jcc(Assembler::equal, VECTOR16_LOOP); 9417 jcc(Assembler::less, VECTOR8_LOOP); 9418 9419 cmpq(length, 32); 9420 jccb(Assembler::less, VECTOR16_TAIL); 9421 9422 subq(length, 32); 9423 bind(VECTOR32_LOOP); 9424 vmovdqu(rymm0, Address(obja, result)); 9425 vmovdqu(rymm1, Address(objb, result)); 9426 vpxor(rymm2, rymm0, rymm1, Assembler::AVX_256bit); 9427 vptest(rymm2, rymm2); 9428 jcc(Assembler::notZero, VECTOR32_NOT_EQUAL);//mismatch found 9429 addq(result, 32); 9430 subq(length, 32); 9431 jccb(Assembler::greaterEqual, VECTOR32_LOOP); 9432 addq(length, 32); 9433 jcc(Assembler::equal, SAME_TILL_END); 9434 //falling through if less than 32 bytes left //close the branch here. 9435 9436 bind(VECTOR16_TAIL); 9437 cmpq(length, 16); 9438 jccb(Assembler::less, VECTOR8_TAIL); 9439 bind(VECTOR16_LOOP); 9440 movdqu(rymm0, Address(obja, result)); 9441 movdqu(rymm1, Address(objb, result)); 9442 vpxor(rymm2, rymm0, rymm1, Assembler::AVX_128bit); 9443 ptest(rymm2, rymm2); 9444 jcc(Assembler::notZero, VECTOR16_NOT_EQUAL);//mismatch found 9445 addq(result, 16); 9446 subq(length, 16); 9447 jcc(Assembler::equal, SAME_TILL_END); 9448 //falling through if less than 16 bytes left 9449 } else {//regular intrinsics 9450 9451 cmpq(length, 16); 9452 jccb(Assembler::less, VECTOR8_TAIL); 9453 9454 subq(length, 16); 9455 bind(VECTOR16_LOOP); 9456 movdqu(rymm0, Address(obja, result)); 9457 movdqu(rymm1, Address(objb, result)); 9458 pxor(rymm0, rymm1); 9459 ptest(rymm0, rymm0); 9460 jcc(Assembler::notZero, VECTOR16_NOT_EQUAL);//mismatch found 9461 addq(result, 16); 9462 subq(length, 16); 9463 jccb(Assembler::greaterEqual, VECTOR16_LOOP); 9464 addq(length, 16); 9465 jcc(Assembler::equal, SAME_TILL_END); 9466 //falling through if less than 16 bytes left 9467 } 9468 9469 bind(VECTOR8_TAIL); 9470 cmpq(length, 8); 9471 jccb(Assembler::less, VECTOR4_TAIL); 9472 bind(VECTOR8_LOOP); 9473 movq(tmp1, Address(obja, result)); 9474 movq(tmp2, Address(objb, result)); 9475 xorq(tmp1, tmp2); 9476 testq(tmp1, tmp1); 9477 jcc(Assembler::notZero, VECTOR8_NOT_EQUAL);//mismatch found 9478 addq(result, 8); 9479 subq(length, 8); 9480 jcc(Assembler::equal, SAME_TILL_END); 9481 //falling through if less than 8 bytes left 9482 9483 bind(VECTOR4_TAIL); 9484 cmpq(length, 4); 9485 jccb(Assembler::less, BYTES_TAIL); 9486 bind(VECTOR4_LOOP); 9487 movl(tmp1, Address(obja, result)); 9488 xorl(tmp1, Address(objb, result)); 9489 testl(tmp1, tmp1); 9490 jcc(Assembler::notZero, VECTOR4_NOT_EQUAL);//mismatch found 9491 addq(result, 4); 9492 subq(length, 4); 9493 jcc(Assembler::equal, SAME_TILL_END); 9494 //falling through if less than 4 bytes left 9495 9496 bind(BYTES_TAIL); 9497 bind(BYTES_LOOP); 9498 load_unsigned_byte(tmp1, Address(obja, result)); 9499 load_unsigned_byte(tmp2, Address(objb, result)); 9500 xorl(tmp1, tmp2); 9501 testl(tmp1, tmp1); 9502 jccb(Assembler::notZero, BYTES_NOT_EQUAL);//mismatch found 9503 decq(length); 9504 jccb(Assembler::zero, SAME_TILL_END); 9505 incq(result); 9506 load_unsigned_byte(tmp1, Address(obja, result)); 9507 load_unsigned_byte(tmp2, Address(objb, result)); 9508 xorl(tmp1, tmp2); 9509 testl(tmp1, tmp1); 9510 jccb(Assembler::notZero, BYTES_NOT_EQUAL);//mismatch found 9511 decq(length); 9512 jccb(Assembler::zero, SAME_TILL_END); 9513 incq(result); 9514 load_unsigned_byte(tmp1, Address(obja, result)); 9515 load_unsigned_byte(tmp2, Address(objb, result)); 9516 xorl(tmp1, tmp2); 9517 testl(tmp1, tmp1); 9518 jccb(Assembler::notZero, BYTES_NOT_EQUAL);//mismatch found 9519 jmpb(SAME_TILL_END); 9520 9521 if (UseAVX >= 2){ 9522 bind(VECTOR32_NOT_EQUAL); 9523 vpcmpeqb(rymm2, rymm2, rymm2, Assembler::AVX_256bit); 9524 vpcmpeqb(rymm0, rymm0, rymm1, Assembler::AVX_256bit); 9525 vpxor(rymm0, rymm0, rymm2, Assembler::AVX_256bit); 9526 vpmovmskb(tmp1, rymm0); 9527 bsfq(tmp1, tmp1); 9528 addq(result, tmp1); 9529 shrq(result); 9530 jmpb(DONE); 9531 } 9532 9533 bind(VECTOR16_NOT_EQUAL); 9534 if (UseAVX >= 2){ 9535 vpcmpeqb(rymm2, rymm2, rymm2, Assembler::AVX_128bit); 9536 vpcmpeqb(rymm0, rymm0, rymm1, Assembler::AVX_128bit); 9537 pxor(rymm0, rymm2); 9538 } else { 9539 pcmpeqb(rymm2, rymm2); 9540 pxor(rymm0, rymm1); 9541 pcmpeqb(rymm0, rymm1); 9542 pxor(rymm0, rymm2); 9543 } 9544 pmovmskb(tmp1, rymm0); 9545 bsfq(tmp1, tmp1); 9546 addq(result, tmp1); 9547 shrq(result); 9548 jmpb(DONE); 9549 9550 bind(VECTOR8_NOT_EQUAL); 9551 bind(VECTOR4_NOT_EQUAL); 9552 bsfq(tmp1, tmp1); 9553 shrq(tmp1, 3); 9554 addq(result, tmp1); 9555 bind(BYTES_NOT_EQUAL); 9556 shrq(result); 9557 jmpb(DONE); 9558 9559 bind(SAME_TILL_END); 9560 mov64(result, -1); 9561 9562 bind(DONE); 9563 } 9564 9565 9566 //Helper functions for square_to_len() 9567 9568 /** 9569 * Store the squares of x[], right shifted one bit (divided by 2) into z[] 9570 * Preserves x and z and modifies rest of the registers. 9571 */ 9572 void MacroAssembler::square_rshift(Register x, Register xlen, Register z, Register tmp1, Register tmp3, Register tmp4, Register tmp5, Register rdxReg, Register raxReg) { 9573 // Perform square and right shift by 1 9574 // Handle odd xlen case first, then for even xlen do the following 9575 // jlong carry = 0; 9576 // for (int j=0, i=0; j < xlen; j+=2, i+=4) { 9577 // huge_128 product = x[j:j+1] * x[j:j+1]; 9578 // z[i:i+1] = (carry << 63) | (jlong)(product >>> 65); 9579 // z[i+2:i+3] = (jlong)(product >>> 1); 9580 // carry = (jlong)product; 9581 // } 9582 9583 xorq(tmp5, tmp5); // carry 9584 xorq(rdxReg, rdxReg); 9585 xorl(tmp1, tmp1); // index for x 9586 xorl(tmp4, tmp4); // index for z 9587 9588 Label L_first_loop, L_first_loop_exit; 9589 9590 testl(xlen, 1); 9591 jccb(Assembler::zero, L_first_loop); //jump if xlen is even 9592 9593 // Square and right shift by 1 the odd element using 32 bit multiply 9594 movl(raxReg, Address(x, tmp1, Address::times_4, 0)); 9595 imulq(raxReg, raxReg); 9596 shrq(raxReg, 1); 9597 adcq(tmp5, 0); 9598 movq(Address(z, tmp4, Address::times_4, 0), raxReg); 9599 incrementl(tmp1); 9600 addl(tmp4, 2); 9601 9602 // Square and right shift by 1 the rest using 64 bit multiply 9603 bind(L_first_loop); 9604 cmpptr(tmp1, xlen); 9605 jccb(Assembler::equal, L_first_loop_exit); 9606 9607 // Square 9608 movq(raxReg, Address(x, tmp1, Address::times_4, 0)); 9609 rorq(raxReg, 32); // convert big-endian to little-endian 9610 mulq(raxReg); // 64-bit multiply rax * rax -> rdx:rax 9611 9612 // Right shift by 1 and save carry 9613 shrq(tmp5, 1); // rdx:rax:tmp5 = (tmp5:rdx:rax) >>> 1 9614 rcrq(rdxReg, 1); 9615 rcrq(raxReg, 1); 9616 adcq(tmp5, 0); 9617 9618 // Store result in z 9619 movq(Address(z, tmp4, Address::times_4, 0), rdxReg); 9620 movq(Address(z, tmp4, Address::times_4, 8), raxReg); 9621 9622 // Update indices for x and z 9623 addl(tmp1, 2); 9624 addl(tmp4, 4); 9625 jmp(L_first_loop); 9626 9627 bind(L_first_loop_exit); 9628 } 9629 9630 9631 /** 9632 * Perform the following multiply add operation using BMI2 instructions 9633 * carry:sum = sum + op1*op2 + carry 9634 * op2 should be in rdx 9635 * op2 is preserved, all other registers are modified 9636 */ 9637 void MacroAssembler::multiply_add_64_bmi2(Register sum, Register op1, Register op2, Register carry, Register tmp2) { 9638 // assert op2 is rdx 9639 mulxq(tmp2, op1, op1); // op1 * op2 -> tmp2:op1 9640 addq(sum, carry); 9641 adcq(tmp2, 0); 9642 addq(sum, op1); 9643 adcq(tmp2, 0); 9644 movq(carry, tmp2); 9645 } 9646 9647 /** 9648 * Perform the following multiply add operation: 9649 * carry:sum = sum + op1*op2 + carry 9650 * Preserves op1, op2 and modifies rest of registers 9651 */ 9652 void MacroAssembler::multiply_add_64(Register sum, Register op1, Register op2, Register carry, Register rdxReg, Register raxReg) { 9653 // rdx:rax = op1 * op2 9654 movq(raxReg, op2); 9655 mulq(op1); 9656 9657 // rdx:rax = sum + carry + rdx:rax 9658 addq(sum, carry); 9659 adcq(rdxReg, 0); 9660 addq(sum, raxReg); 9661 adcq(rdxReg, 0); 9662 9663 // carry:sum = rdx:sum 9664 movq(carry, rdxReg); 9665 } 9666 9667 /** 9668 * Add 64 bit long carry into z[] with carry propogation. 9669 * Preserves z and carry register values and modifies rest of registers. 9670 * 9671 */ 9672 void MacroAssembler::add_one_64(Register z, Register zlen, Register carry, Register tmp1) { 9673 Label L_fourth_loop, L_fourth_loop_exit; 9674 9675 movl(tmp1, 1); 9676 subl(zlen, 2); 9677 addq(Address(z, zlen, Address::times_4, 0), carry); 9678 9679 bind(L_fourth_loop); 9680 jccb(Assembler::carryClear, L_fourth_loop_exit); 9681 subl(zlen, 2); 9682 jccb(Assembler::negative, L_fourth_loop_exit); 9683 addq(Address(z, zlen, Address::times_4, 0), tmp1); 9684 jmp(L_fourth_loop); 9685 bind(L_fourth_loop_exit); 9686 } 9687 9688 /** 9689 * Shift z[] left by 1 bit. 9690 * Preserves x, len, z and zlen registers and modifies rest of the registers. 9691 * 9692 */ 9693 void MacroAssembler::lshift_by_1(Register x, Register len, Register z, Register zlen, Register tmp1, Register tmp2, Register tmp3, Register tmp4) { 9694 9695 Label L_fifth_loop, L_fifth_loop_exit; 9696 9697 // Fifth loop 9698 // Perform primitiveLeftShift(z, zlen, 1) 9699 9700 const Register prev_carry = tmp1; 9701 const Register new_carry = tmp4; 9702 const Register value = tmp2; 9703 const Register zidx = tmp3; 9704 9705 // int zidx, carry; 9706 // long value; 9707 // carry = 0; 9708 // for (zidx = zlen-2; zidx >=0; zidx -= 2) { 9709 // (carry:value) = (z[i] << 1) | carry ; 9710 // z[i] = value; 9711 // } 9712 9713 movl(zidx, zlen); 9714 xorl(prev_carry, prev_carry); // clear carry flag and prev_carry register 9715 9716 bind(L_fifth_loop); 9717 decl(zidx); // Use decl to preserve carry flag 9718 decl(zidx); 9719 jccb(Assembler::negative, L_fifth_loop_exit); 9720 9721 if (UseBMI2Instructions) { 9722 movq(value, Address(z, zidx, Address::times_4, 0)); 9723 rclq(value, 1); 9724 rorxq(value, value, 32); 9725 movq(Address(z, zidx, Address::times_4, 0), value); // Store back in big endian form 9726 } 9727 else { 9728 // clear new_carry 9729 xorl(new_carry, new_carry); 9730 9731 // Shift z[i] by 1, or in previous carry and save new carry 9732 movq(value, Address(z, zidx, Address::times_4, 0)); 9733 shlq(value, 1); 9734 adcl(new_carry, 0); 9735 9736 orq(value, prev_carry); 9737 rorq(value, 0x20); 9738 movq(Address(z, zidx, Address::times_4, 0), value); // Store back in big endian form 9739 9740 // Set previous carry = new carry 9741 movl(prev_carry, new_carry); 9742 } 9743 jmp(L_fifth_loop); 9744 9745 bind(L_fifth_loop_exit); 9746 } 9747 9748 9749 /** 9750 * Code for BigInteger::squareToLen() intrinsic 9751 * 9752 * rdi: x 9753 * rsi: len 9754 * r8: z 9755 * rcx: zlen 9756 * r12: tmp1 9757 * r13: tmp2 9758 * r14: tmp3 9759 * r15: tmp4 9760 * rbx: tmp5 9761 * 9762 */ 9763 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) { 9764 9765 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; 9766 push(tmp1); 9767 push(tmp2); 9768 push(tmp3); 9769 push(tmp4); 9770 push(tmp5); 9771 9772 // First loop 9773 // Store the squares, right shifted one bit (i.e., divided by 2). 9774 square_rshift(x, len, z, tmp1, tmp3, tmp4, tmp5, rdxReg, raxReg); 9775 9776 // Add in off-diagonal sums. 9777 // 9778 // Second, third (nested) and fourth loops. 9779 // zlen +=2; 9780 // for (int xidx=len-2,zidx=zlen-4; xidx > 0; xidx-=2,zidx-=4) { 9781 // carry = 0; 9782 // long op2 = x[xidx:xidx+1]; 9783 // for (int j=xidx-2,k=zidx; j >= 0; j-=2) { 9784 // k -= 2; 9785 // long op1 = x[j:j+1]; 9786 // long sum = z[k:k+1]; 9787 // carry:sum = multiply_add_64(sum, op1, op2, carry, tmp_regs); 9788 // z[k:k+1] = sum; 9789 // } 9790 // add_one_64(z, k, carry, tmp_regs); 9791 // } 9792 9793 const Register carry = tmp5; 9794 const Register sum = tmp3; 9795 const Register op1 = tmp4; 9796 Register op2 = tmp2; 9797 9798 push(zlen); 9799 push(len); 9800 addl(zlen,2); 9801 bind(L_second_loop); 9802 xorq(carry, carry); 9803 subl(zlen, 4); 9804 subl(len, 2); 9805 push(zlen); 9806 push(len); 9807 cmpl(len, 0); 9808 jccb(Assembler::lessEqual, L_second_loop_exit); 9809 9810 // Multiply an array by one 64 bit long. 9811 if (UseBMI2Instructions) { 9812 op2 = rdxReg; 9813 movq(op2, Address(x, len, Address::times_4, 0)); 9814 rorxq(op2, op2, 32); 9815 } 9816 else { 9817 movq(op2, Address(x, len, Address::times_4, 0)); 9818 rorq(op2, 32); 9819 } 9820 9821 bind(L_third_loop); 9822 decrementl(len); 9823 jccb(Assembler::negative, L_third_loop_exit); 9824 decrementl(len); 9825 jccb(Assembler::negative, L_last_x); 9826 9827 movq(op1, Address(x, len, Address::times_4, 0)); 9828 rorq(op1, 32); 9829 9830 bind(L_multiply); 9831 subl(zlen, 2); 9832 movq(sum, Address(z, zlen, Address::times_4, 0)); 9833 9834 // Multiply 64 bit by 64 bit and add 64 bits lower half and upper 64 bits as carry. 9835 if (UseBMI2Instructions) { 9836 multiply_add_64_bmi2(sum, op1, op2, carry, tmp2); 9837 } 9838 else { 9839 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg); 9840 } 9841 9842 movq(Address(z, zlen, Address::times_4, 0), sum); 9843 9844 jmp(L_third_loop); 9845 bind(L_third_loop_exit); 9846 9847 // Fourth loop 9848 // Add 64 bit long carry into z with carry propogation. 9849 // Uses offsetted zlen. 9850 add_one_64(z, zlen, carry, tmp1); 9851 9852 pop(len); 9853 pop(zlen); 9854 jmp(L_second_loop); 9855 9856 // Next infrequent code is moved outside loops. 9857 bind(L_last_x); 9858 movl(op1, Address(x, 0)); 9859 jmp(L_multiply); 9860 9861 bind(L_second_loop_exit); 9862 pop(len); 9863 pop(zlen); 9864 pop(len); 9865 pop(zlen); 9866 9867 // Fifth loop 9868 // Shift z left 1 bit. 9869 lshift_by_1(x, len, z, zlen, tmp1, tmp2, tmp3, tmp4); 9870 9871 // z[zlen-1] |= x[len-1] & 1; 9872 movl(tmp3, Address(x, len, Address::times_4, -4)); 9873 andl(tmp3, 1); 9874 orl(Address(z, zlen, Address::times_4, -4), tmp3); 9875 9876 pop(tmp5); 9877 pop(tmp4); 9878 pop(tmp3); 9879 pop(tmp2); 9880 pop(tmp1); 9881 } 9882 9883 /** 9884 * Helper function for mul_add() 9885 * Multiply the in[] by int k and add to out[] starting at offset offs using 9886 * 128 bit by 32 bit multiply and return the carry in tmp5. 9887 * Only quad int aligned length of in[] is operated on in this function. 9888 * k is in rdxReg for BMI2Instructions, for others it is in tmp2. 9889 * This function preserves out, in and k registers. 9890 * len and offset point to the appropriate index in "in" & "out" correspondingly 9891 * tmp5 has the carry. 9892 * other registers are temporary and are modified. 9893 * 9894 */ 9895 void MacroAssembler::mul_add_128_x_32_loop(Register out, Register in, 9896 Register offset, Register len, Register tmp1, Register tmp2, Register tmp3, 9897 Register tmp4, Register tmp5, Register rdxReg, Register raxReg) { 9898 9899 Label L_first_loop, L_first_loop_exit; 9900 9901 movl(tmp1, len); 9902 shrl(tmp1, 2); 9903 9904 bind(L_first_loop); 9905 subl(tmp1, 1); 9906 jccb(Assembler::negative, L_first_loop_exit); 9907 9908 subl(len, 4); 9909 subl(offset, 4); 9910 9911 Register op2 = tmp2; 9912 const Register sum = tmp3; 9913 const Register op1 = tmp4; 9914 const Register carry = tmp5; 9915 9916 if (UseBMI2Instructions) { 9917 op2 = rdxReg; 9918 } 9919 9920 movq(op1, Address(in, len, Address::times_4, 8)); 9921 rorq(op1, 32); 9922 movq(sum, Address(out, offset, Address::times_4, 8)); 9923 rorq(sum, 32); 9924 if (UseBMI2Instructions) { 9925 multiply_add_64_bmi2(sum, op1, op2, carry, raxReg); 9926 } 9927 else { 9928 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg); 9929 } 9930 // Store back in big endian from little endian 9931 rorq(sum, 0x20); 9932 movq(Address(out, offset, Address::times_4, 8), sum); 9933 9934 movq(op1, Address(in, len, Address::times_4, 0)); 9935 rorq(op1, 32); 9936 movq(sum, Address(out, offset, Address::times_4, 0)); 9937 rorq(sum, 32); 9938 if (UseBMI2Instructions) { 9939 multiply_add_64_bmi2(sum, op1, op2, carry, raxReg); 9940 } 9941 else { 9942 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg); 9943 } 9944 // Store back in big endian from little endian 9945 rorq(sum, 0x20); 9946 movq(Address(out, offset, Address::times_4, 0), sum); 9947 9948 jmp(L_first_loop); 9949 bind(L_first_loop_exit); 9950 } 9951 9952 /** 9953 * Code for BigInteger::mulAdd() intrinsic 9954 * 9955 * rdi: out 9956 * rsi: in 9957 * r11: offs (out.length - offset) 9958 * rcx: len 9959 * r8: k 9960 * r12: tmp1 9961 * r13: tmp2 9962 * r14: tmp3 9963 * r15: tmp4 9964 * rbx: tmp5 9965 * Multiply the in[] by word k and add to out[], return the carry in rax 9966 */ 9967 void MacroAssembler::mul_add(Register out, Register in, Register offs, 9968 Register len, Register k, Register tmp1, Register tmp2, Register tmp3, 9969 Register tmp4, Register tmp5, Register rdxReg, Register raxReg) { 9970 9971 Label L_carry, L_last_in, L_done; 9972 9973 // carry = 0; 9974 // for (int j=len-1; j >= 0; j--) { 9975 // long product = (in[j] & LONG_MASK) * kLong + 9976 // (out[offs] & LONG_MASK) + carry; 9977 // out[offs--] = (int)product; 9978 // carry = product >>> 32; 9979 // } 9980 // 9981 push(tmp1); 9982 push(tmp2); 9983 push(tmp3); 9984 push(tmp4); 9985 push(tmp5); 9986 9987 Register op2 = tmp2; 9988 const Register sum = tmp3; 9989 const Register op1 = tmp4; 9990 const Register carry = tmp5; 9991 9992 if (UseBMI2Instructions) { 9993 op2 = rdxReg; 9994 movl(op2, k); 9995 } 9996 else { 9997 movl(op2, k); 9998 } 9999 10000 xorq(carry, carry); 10001 10002 //First loop 10003 10004 //Multiply in[] by k in a 4 way unrolled loop using 128 bit by 32 bit multiply 10005 //The carry is in tmp5 10006 mul_add_128_x_32_loop(out, in, offs, len, tmp1, tmp2, tmp3, tmp4, tmp5, rdxReg, raxReg); 10007 10008 //Multiply the trailing in[] entry using 64 bit by 32 bit, if any 10009 decrementl(len); 10010 jccb(Assembler::negative, L_carry); 10011 decrementl(len); 10012 jccb(Assembler::negative, L_last_in); 10013 10014 movq(op1, Address(in, len, Address::times_4, 0)); 10015 rorq(op1, 32); 10016 10017 subl(offs, 2); 10018 movq(sum, Address(out, offs, Address::times_4, 0)); 10019 rorq(sum, 32); 10020 10021 if (UseBMI2Instructions) { 10022 multiply_add_64_bmi2(sum, op1, op2, carry, raxReg); 10023 } 10024 else { 10025 multiply_add_64(sum, op1, op2, carry, rdxReg, raxReg); 10026 } 10027 10028 // Store back in big endian from little endian 10029 rorq(sum, 0x20); 10030 movq(Address(out, offs, Address::times_4, 0), sum); 10031 10032 testl(len, len); 10033 jccb(Assembler::zero, L_carry); 10034 10035 //Multiply the last in[] entry, if any 10036 bind(L_last_in); 10037 movl(op1, Address(in, 0)); 10038 movl(sum, Address(out, offs, Address::times_4, -4)); 10039 10040 movl(raxReg, k); 10041 mull(op1); //tmp4 * eax -> edx:eax 10042 addl(sum, carry); 10043 adcl(rdxReg, 0); 10044 addl(sum, raxReg); 10045 adcl(rdxReg, 0); 10046 movl(carry, rdxReg); 10047 10048 movl(Address(out, offs, Address::times_4, -4), sum); 10049 10050 bind(L_carry); 10051 //return tmp5/carry as carry in rax 10052 movl(rax, carry); 10053 10054 bind(L_done); 10055 pop(tmp5); 10056 pop(tmp4); 10057 pop(tmp3); 10058 pop(tmp2); 10059 pop(tmp1); 10060 } 10061 #endif 10062 10063 /** 10064 * Emits code to update CRC-32 with a byte value according to constants in table 10065 * 10066 * @param [in,out]crc Register containing the crc. 10067 * @param [in]val Register containing the byte to fold into the CRC. 10068 * @param [in]table Register containing the table of crc constants. 10069 * 10070 * uint32_t crc; 10071 * val = crc_table[(val ^ crc) & 0xFF]; 10072 * crc = val ^ (crc >> 8); 10073 * 10074 */ 10075 void MacroAssembler::update_byte_crc32(Register crc, Register val, Register table) { 10076 xorl(val, crc); 10077 andl(val, 0xFF); 10078 shrl(crc, 8); // unsigned shift 10079 xorl(crc, Address(table, val, Address::times_4, 0)); 10080 } 10081 10082 /** 10083 * Fold 128-bit data chunk 10084 */ 10085 void MacroAssembler::fold_128bit_crc32(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, Register buf, int offset) { 10086 if (UseAVX > 0) { 10087 vpclmulhdq(xtmp, xK, xcrc); // [123:64] 10088 vpclmulldq(xcrc, xK, xcrc); // [63:0] 10089 vpxor(xcrc, xcrc, Address(buf, offset), 0 /* vector_len */); 10090 pxor(xcrc, xtmp); 10091 } else { 10092 movdqa(xtmp, xcrc); 10093 pclmulhdq(xtmp, xK); // [123:64] 10094 pclmulldq(xcrc, xK); // [63:0] 10095 pxor(xcrc, xtmp); 10096 movdqu(xtmp, Address(buf, offset)); 10097 pxor(xcrc, xtmp); 10098 } 10099 } 10100 10101 void MacroAssembler::fold_128bit_crc32(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, XMMRegister xbuf) { 10102 if (UseAVX > 0) { 10103 vpclmulhdq(xtmp, xK, xcrc); 10104 vpclmulldq(xcrc, xK, xcrc); 10105 pxor(xcrc, xbuf); 10106 pxor(xcrc, xtmp); 10107 } else { 10108 movdqa(xtmp, xcrc); 10109 pclmulhdq(xtmp, xK); 10110 pclmulldq(xcrc, xK); 10111 pxor(xcrc, xbuf); 10112 pxor(xcrc, xtmp); 10113 } 10114 } 10115 10116 /** 10117 * 8-bit folds to compute 32-bit CRC 10118 * 10119 * uint64_t xcrc; 10120 * timesXtoThe32[xcrc & 0xFF] ^ (xcrc >> 8); 10121 */ 10122 void MacroAssembler::fold_8bit_crc32(XMMRegister xcrc, Register table, XMMRegister xtmp, Register tmp) { 10123 movdl(tmp, xcrc); 10124 andl(tmp, 0xFF); 10125 movdl(xtmp, Address(table, tmp, Address::times_4, 0)); 10126 psrldq(xcrc, 1); // unsigned shift one byte 10127 pxor(xcrc, xtmp); 10128 } 10129 10130 /** 10131 * uint32_t crc; 10132 * timesXtoThe32[crc & 0xFF] ^ (crc >> 8); 10133 */ 10134 void MacroAssembler::fold_8bit_crc32(Register crc, Register table, Register tmp) { 10135 movl(tmp, crc); 10136 andl(tmp, 0xFF); 10137 shrl(crc, 8); 10138 xorl(crc, Address(table, tmp, Address::times_4, 0)); 10139 } 10140 10141 /** 10142 * @param crc register containing existing CRC (32-bit) 10143 * @param buf register pointing to input byte buffer (byte*) 10144 * @param len register containing number of bytes 10145 * @param table register that will contain address of CRC table 10146 * @param tmp scratch register 10147 */ 10148 void MacroAssembler::kernel_crc32(Register crc, Register buf, Register len, Register table, Register tmp) { 10149 assert_different_registers(crc, buf, len, table, tmp, rax); 10150 10151 Label L_tail, L_tail_restore, L_tail_loop, L_exit, L_align_loop, L_aligned; 10152 Label L_fold_tail, L_fold_128b, L_fold_512b, L_fold_512b_loop, L_fold_tail_loop; 10153 10154 // For EVEX with VL and BW, provide a standard mask, VL = 128 will guide the merge 10155 // context for the registers used, where all instructions below are using 128-bit mode 10156 // On EVEX without VL and BW, these instructions will all be AVX. 10157 if (VM_Version::supports_avx512vlbw()) { 10158 movl(tmp, 0xffff); 10159 kmovwl(k1, tmp); 10160 } 10161 10162 lea(table, ExternalAddress(StubRoutines::crc_table_addr())); 10163 notl(crc); // ~crc 10164 cmpl(len, 16); 10165 jcc(Assembler::less, L_tail); 10166 10167 // Align buffer to 16 bytes 10168 movl(tmp, buf); 10169 andl(tmp, 0xF); 10170 jccb(Assembler::zero, L_aligned); 10171 subl(tmp, 16); 10172 addl(len, tmp); 10173 10174 align(4); 10175 BIND(L_align_loop); 10176 movsbl(rax, Address(buf, 0)); // load byte with sign extension 10177 update_byte_crc32(crc, rax, table); 10178 increment(buf); 10179 incrementl(tmp); 10180 jccb(Assembler::less, L_align_loop); 10181 10182 BIND(L_aligned); 10183 movl(tmp, len); // save 10184 shrl(len, 4); 10185 jcc(Assembler::zero, L_tail_restore); 10186 10187 // Fold crc into first bytes of vector 10188 movdqa(xmm1, Address(buf, 0)); 10189 movdl(rax, xmm1); 10190 xorl(crc, rax); 10191 pinsrd(xmm1, crc, 0); 10192 addptr(buf, 16); 10193 subl(len, 4); // len > 0 10194 jcc(Assembler::less, L_fold_tail); 10195 10196 movdqa(xmm2, Address(buf, 0)); 10197 movdqa(xmm3, Address(buf, 16)); 10198 movdqa(xmm4, Address(buf, 32)); 10199 addptr(buf, 48); 10200 subl(len, 3); 10201 jcc(Assembler::lessEqual, L_fold_512b); 10202 10203 // Fold total 512 bits of polynomial on each iteration, 10204 // 128 bits per each of 4 parallel streams. 10205 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 32)); 10206 10207 align(32); 10208 BIND(L_fold_512b_loop); 10209 fold_128bit_crc32(xmm1, xmm0, xmm5, buf, 0); 10210 fold_128bit_crc32(xmm2, xmm0, xmm5, buf, 16); 10211 fold_128bit_crc32(xmm3, xmm0, xmm5, buf, 32); 10212 fold_128bit_crc32(xmm4, xmm0, xmm5, buf, 48); 10213 addptr(buf, 64); 10214 subl(len, 4); 10215 jcc(Assembler::greater, L_fold_512b_loop); 10216 10217 // Fold 512 bits to 128 bits. 10218 BIND(L_fold_512b); 10219 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 16)); 10220 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm2); 10221 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm3); 10222 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm4); 10223 10224 // Fold the rest of 128 bits data chunks 10225 BIND(L_fold_tail); 10226 addl(len, 3); 10227 jccb(Assembler::lessEqual, L_fold_128b); 10228 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 16)); 10229 10230 BIND(L_fold_tail_loop); 10231 fold_128bit_crc32(xmm1, xmm0, xmm5, buf, 0); 10232 addptr(buf, 16); 10233 decrementl(len); 10234 jccb(Assembler::greater, L_fold_tail_loop); 10235 10236 // Fold 128 bits in xmm1 down into 32 bits in crc register. 10237 BIND(L_fold_128b); 10238 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr())); 10239 if (UseAVX > 0) { 10240 vpclmulqdq(xmm2, xmm0, xmm1, 0x1); 10241 vpand(xmm3, xmm0, xmm2, 0 /* vector_len */); 10242 vpclmulqdq(xmm0, xmm0, xmm3, 0x1); 10243 } else { 10244 movdqa(xmm2, xmm0); 10245 pclmulqdq(xmm2, xmm1, 0x1); 10246 movdqa(xmm3, xmm0); 10247 pand(xmm3, xmm2); 10248 pclmulqdq(xmm0, xmm3, 0x1); 10249 } 10250 psrldq(xmm1, 8); 10251 psrldq(xmm2, 4); 10252 pxor(xmm0, xmm1); 10253 pxor(xmm0, xmm2); 10254 10255 // 8 8-bit folds to compute 32-bit CRC. 10256 for (int j = 0; j < 4; j++) { 10257 fold_8bit_crc32(xmm0, table, xmm1, rax); 10258 } 10259 movdl(crc, xmm0); // mov 32 bits to general register 10260 for (int j = 0; j < 4; j++) { 10261 fold_8bit_crc32(crc, table, rax); 10262 } 10263 10264 BIND(L_tail_restore); 10265 movl(len, tmp); // restore 10266 BIND(L_tail); 10267 andl(len, 0xf); 10268 jccb(Assembler::zero, L_exit); 10269 10270 // Fold the rest of bytes 10271 align(4); 10272 BIND(L_tail_loop); 10273 movsbl(rax, Address(buf, 0)); // load byte with sign extension 10274 update_byte_crc32(crc, rax, table); 10275 increment(buf); 10276 decrementl(len); 10277 jccb(Assembler::greater, L_tail_loop); 10278 10279 BIND(L_exit); 10280 notl(crc); // ~c 10281 } 10282 10283 #ifdef _LP64 10284 // S. Gueron / Information Processing Letters 112 (2012) 184 10285 // Algorithm 4: Computing carry-less multiplication using a precomputed lookup table. 10286 // Input: A 32 bit value B = [byte3, byte2, byte1, byte0]. 10287 // Output: the 64-bit carry-less product of B * CONST 10288 void MacroAssembler::crc32c_ipl_alg4(Register in, uint32_t n, 10289 Register tmp1, Register tmp2, Register tmp3) { 10290 lea(tmp3, ExternalAddress(StubRoutines::crc32c_table_addr())); 10291 if (n > 0) { 10292 addq(tmp3, n * 256 * 8); 10293 } 10294 // Q1 = TABLEExt[n][B & 0xFF]; 10295 movl(tmp1, in); 10296 andl(tmp1, 0x000000FF); 10297 shll(tmp1, 3); 10298 addq(tmp1, tmp3); 10299 movq(tmp1, Address(tmp1, 0)); 10300 10301 // Q2 = TABLEExt[n][B >> 8 & 0xFF]; 10302 movl(tmp2, in); 10303 shrl(tmp2, 8); 10304 andl(tmp2, 0x000000FF); 10305 shll(tmp2, 3); 10306 addq(tmp2, tmp3); 10307 movq(tmp2, Address(tmp2, 0)); 10308 10309 shlq(tmp2, 8); 10310 xorq(tmp1, tmp2); 10311 10312 // Q3 = TABLEExt[n][B >> 16 & 0xFF]; 10313 movl(tmp2, in); 10314 shrl(tmp2, 16); 10315 andl(tmp2, 0x000000FF); 10316 shll(tmp2, 3); 10317 addq(tmp2, tmp3); 10318 movq(tmp2, Address(tmp2, 0)); 10319 10320 shlq(tmp2, 16); 10321 xorq(tmp1, tmp2); 10322 10323 // Q4 = TABLEExt[n][B >> 24 & 0xFF]; 10324 shrl(in, 24); 10325 andl(in, 0x000000FF); 10326 shll(in, 3); 10327 addq(in, tmp3); 10328 movq(in, Address(in, 0)); 10329 10330 shlq(in, 24); 10331 xorq(in, tmp1); 10332 // return Q1 ^ Q2 << 8 ^ Q3 << 16 ^ Q4 << 24; 10333 } 10334 10335 void MacroAssembler::crc32c_pclmulqdq(XMMRegister w_xtmp1, 10336 Register in_out, 10337 uint32_t const_or_pre_comp_const_index, bool is_pclmulqdq_supported, 10338 XMMRegister w_xtmp2, 10339 Register tmp1, 10340 Register n_tmp2, Register n_tmp3) { 10341 if (is_pclmulqdq_supported) { 10342 movdl(w_xtmp1, in_out); // modified blindly 10343 10344 movl(tmp1, const_or_pre_comp_const_index); 10345 movdl(w_xtmp2, tmp1); 10346 pclmulqdq(w_xtmp1, w_xtmp2, 0); 10347 10348 movdq(in_out, w_xtmp1); 10349 } else { 10350 crc32c_ipl_alg4(in_out, const_or_pre_comp_const_index, tmp1, n_tmp2, n_tmp3); 10351 } 10352 } 10353 10354 // Recombination Alternative 2: No bit-reflections 10355 // T1 = (CRC_A * U1) << 1 10356 // T2 = (CRC_B * U2) << 1 10357 // C1 = T1 >> 32 10358 // C2 = T2 >> 32 10359 // T1 = T1 & 0xFFFFFFFF 10360 // T2 = T2 & 0xFFFFFFFF 10361 // T1 = CRC32(0, T1) 10362 // T2 = CRC32(0, T2) 10363 // C1 = C1 ^ T1 10364 // C2 = C2 ^ T2 10365 // CRC = C1 ^ C2 ^ CRC_C 10366 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, 10367 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3, 10368 Register tmp1, Register tmp2, 10369 Register n_tmp3) { 10370 crc32c_pclmulqdq(w_xtmp1, in_out, const_or_pre_comp_const_index_u1, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3); 10371 crc32c_pclmulqdq(w_xtmp2, in1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3); 10372 shlq(in_out, 1); 10373 movl(tmp1, in_out); 10374 shrq(in_out, 32); 10375 xorl(tmp2, tmp2); 10376 crc32(tmp2, tmp1, 4); 10377 xorl(in_out, tmp2); // we don't care about upper 32 bit contents here 10378 shlq(in1, 1); 10379 movl(tmp1, in1); 10380 shrq(in1, 32); 10381 xorl(tmp2, tmp2); 10382 crc32(tmp2, tmp1, 4); 10383 xorl(in1, tmp2); 10384 xorl(in_out, in1); 10385 xorl(in_out, in2); 10386 } 10387 10388 // Set N to predefined value 10389 // Subtract from a lenght of a buffer 10390 // execute in a loop: 10391 // CRC_A = 0xFFFFFFFF, CRC_B = 0, CRC_C = 0 10392 // for i = 1 to N do 10393 // CRC_A = CRC32(CRC_A, A[i]) 10394 // CRC_B = CRC32(CRC_B, B[i]) 10395 // CRC_C = CRC32(CRC_C, C[i]) 10396 // end for 10397 // Recombine 10398 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, 10399 Register in_out1, Register in_out2, Register in_out3, 10400 Register tmp1, Register tmp2, Register tmp3, 10401 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3, 10402 Register tmp4, Register tmp5, 10403 Register n_tmp6) { 10404 Label L_processPartitions; 10405 Label L_processPartition; 10406 Label L_exit; 10407 10408 bind(L_processPartitions); 10409 cmpl(in_out1, 3 * size); 10410 jcc(Assembler::less, L_exit); 10411 xorl(tmp1, tmp1); 10412 xorl(tmp2, tmp2); 10413 movq(tmp3, in_out2); 10414 addq(tmp3, size); 10415 10416 bind(L_processPartition); 10417 crc32(in_out3, Address(in_out2, 0), 8); 10418 crc32(tmp1, Address(in_out2, size), 8); 10419 crc32(tmp2, Address(in_out2, size * 2), 8); 10420 addq(in_out2, 8); 10421 cmpq(in_out2, tmp3); 10422 jcc(Assembler::less, L_processPartition); 10423 crc32c_rec_alt2(const_or_pre_comp_const_index_u1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, in_out3, tmp1, tmp2, 10424 w_xtmp1, w_xtmp2, w_xtmp3, 10425 tmp4, tmp5, 10426 n_tmp6); 10427 addq(in_out2, 2 * size); 10428 subl(in_out1, 3 * size); 10429 jmp(L_processPartitions); 10430 10431 bind(L_exit); 10432 } 10433 #else 10434 void MacroAssembler::crc32c_ipl_alg4(Register in_out, uint32_t n, 10435 Register tmp1, Register tmp2, Register tmp3, 10436 XMMRegister xtmp1, XMMRegister xtmp2) { 10437 lea(tmp3, ExternalAddress(StubRoutines::crc32c_table_addr())); 10438 if (n > 0) { 10439 addl(tmp3, n * 256 * 8); 10440 } 10441 // Q1 = TABLEExt[n][B & 0xFF]; 10442 movl(tmp1, in_out); 10443 andl(tmp1, 0x000000FF); 10444 shll(tmp1, 3); 10445 addl(tmp1, tmp3); 10446 movq(xtmp1, Address(tmp1, 0)); 10447 10448 // Q2 = TABLEExt[n][B >> 8 & 0xFF]; 10449 movl(tmp2, in_out); 10450 shrl(tmp2, 8); 10451 andl(tmp2, 0x000000FF); 10452 shll(tmp2, 3); 10453 addl(tmp2, tmp3); 10454 movq(xtmp2, Address(tmp2, 0)); 10455 10456 psllq(xtmp2, 8); 10457 pxor(xtmp1, xtmp2); 10458 10459 // Q3 = TABLEExt[n][B >> 16 & 0xFF]; 10460 movl(tmp2, in_out); 10461 shrl(tmp2, 16); 10462 andl(tmp2, 0x000000FF); 10463 shll(tmp2, 3); 10464 addl(tmp2, tmp3); 10465 movq(xtmp2, Address(tmp2, 0)); 10466 10467 psllq(xtmp2, 16); 10468 pxor(xtmp1, xtmp2); 10469 10470 // Q4 = TABLEExt[n][B >> 24 & 0xFF]; 10471 shrl(in_out, 24); 10472 andl(in_out, 0x000000FF); 10473 shll(in_out, 3); 10474 addl(in_out, tmp3); 10475 movq(xtmp2, Address(in_out, 0)); 10476 10477 psllq(xtmp2, 24); 10478 pxor(xtmp1, xtmp2); // Result in CXMM 10479 // return Q1 ^ Q2 << 8 ^ Q3 << 16 ^ Q4 << 24; 10480 } 10481 10482 void MacroAssembler::crc32c_pclmulqdq(XMMRegister w_xtmp1, 10483 Register in_out, 10484 uint32_t const_or_pre_comp_const_index, bool is_pclmulqdq_supported, 10485 XMMRegister w_xtmp2, 10486 Register tmp1, 10487 Register n_tmp2, Register n_tmp3) { 10488 if (is_pclmulqdq_supported) { 10489 movdl(w_xtmp1, in_out); 10490 10491 movl(tmp1, const_or_pre_comp_const_index); 10492 movdl(w_xtmp2, tmp1); 10493 pclmulqdq(w_xtmp1, w_xtmp2, 0); 10494 // Keep result in XMM since GPR is 32 bit in length 10495 } else { 10496 crc32c_ipl_alg4(in_out, const_or_pre_comp_const_index, tmp1, n_tmp2, n_tmp3, w_xtmp1, w_xtmp2); 10497 } 10498 } 10499 10500 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, 10501 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3, 10502 Register tmp1, Register tmp2, 10503 Register n_tmp3) { 10504 crc32c_pclmulqdq(w_xtmp1, in_out, const_or_pre_comp_const_index_u1, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3); 10505 crc32c_pclmulqdq(w_xtmp2, in1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, w_xtmp3, tmp1, tmp2, n_tmp3); 10506 10507 psllq(w_xtmp1, 1); 10508 movdl(tmp1, w_xtmp1); 10509 psrlq(w_xtmp1, 32); 10510 movdl(in_out, w_xtmp1); 10511 10512 xorl(tmp2, tmp2); 10513 crc32(tmp2, tmp1, 4); 10514 xorl(in_out, tmp2); 10515 10516 psllq(w_xtmp2, 1); 10517 movdl(tmp1, w_xtmp2); 10518 psrlq(w_xtmp2, 32); 10519 movdl(in1, w_xtmp2); 10520 10521 xorl(tmp2, tmp2); 10522 crc32(tmp2, tmp1, 4); 10523 xorl(in1, tmp2); 10524 xorl(in_out, in1); 10525 xorl(in_out, in2); 10526 } 10527 10528 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, 10529 Register in_out1, Register in_out2, Register in_out3, 10530 Register tmp1, Register tmp2, Register tmp3, 10531 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3, 10532 Register tmp4, Register tmp5, 10533 Register n_tmp6) { 10534 Label L_processPartitions; 10535 Label L_processPartition; 10536 Label L_exit; 10537 10538 bind(L_processPartitions); 10539 cmpl(in_out1, 3 * size); 10540 jcc(Assembler::less, L_exit); 10541 xorl(tmp1, tmp1); 10542 xorl(tmp2, tmp2); 10543 movl(tmp3, in_out2); 10544 addl(tmp3, size); 10545 10546 bind(L_processPartition); 10547 crc32(in_out3, Address(in_out2, 0), 4); 10548 crc32(tmp1, Address(in_out2, size), 4); 10549 crc32(tmp2, Address(in_out2, size*2), 4); 10550 crc32(in_out3, Address(in_out2, 0+4), 4); 10551 crc32(tmp1, Address(in_out2, size+4), 4); 10552 crc32(tmp2, Address(in_out2, size*2+4), 4); 10553 addl(in_out2, 8); 10554 cmpl(in_out2, tmp3); 10555 jcc(Assembler::less, L_processPartition); 10556 10557 push(tmp3); 10558 push(in_out1); 10559 push(in_out2); 10560 tmp4 = tmp3; 10561 tmp5 = in_out1; 10562 n_tmp6 = in_out2; 10563 10564 crc32c_rec_alt2(const_or_pre_comp_const_index_u1, const_or_pre_comp_const_index_u2, is_pclmulqdq_supported, in_out3, tmp1, tmp2, 10565 w_xtmp1, w_xtmp2, w_xtmp3, 10566 tmp4, tmp5, 10567 n_tmp6); 10568 10569 pop(in_out2); 10570 pop(in_out1); 10571 pop(tmp3); 10572 10573 addl(in_out2, 2 * size); 10574 subl(in_out1, 3 * size); 10575 jmp(L_processPartitions); 10576 10577 bind(L_exit); 10578 } 10579 #endif //LP64 10580 10581 #ifdef _LP64 10582 // Algorithm 2: Pipelined usage of the CRC32 instruction. 10583 // Input: A buffer I of L bytes. 10584 // Output: the CRC32C value of the buffer. 10585 // Notations: 10586 // Write L = 24N + r, with N = floor (L/24). 10587 // r = L mod 24 (0 <= r < 24). 10588 // Consider I as the concatenation of A|B|C|R, where A, B, C, each, 10589 // N quadwords, and R consists of r bytes. 10590 // A[j] = I [8j+7:8j], j= 0, 1, ..., N-1 10591 // B[j] = I [N + 8j+7:N + 8j], j= 0, 1, ..., N-1 10592 // C[j] = I [2N + 8j+7:2N + 8j], j= 0, 1, ..., N-1 10593 // if r > 0 R[j] = I [3N +j], j= 0, 1, ...,r-1 10594 void MacroAssembler::crc32c_ipl_alg2_alt2(Register in_out, Register in1, Register in2, 10595 Register tmp1, Register tmp2, Register tmp3, 10596 Register tmp4, Register tmp5, Register tmp6, 10597 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3, 10598 bool is_pclmulqdq_supported) { 10599 uint32_t const_or_pre_comp_const_index[CRC32C_NUM_PRECOMPUTED_CONSTANTS]; 10600 Label L_wordByWord; 10601 Label L_byteByByteProlog; 10602 Label L_byteByByte; 10603 Label L_exit; 10604 10605 if (is_pclmulqdq_supported ) { 10606 const_or_pre_comp_const_index[1] = *(uint32_t *)StubRoutines::_crc32c_table_addr; 10607 const_or_pre_comp_const_index[0] = *((uint32_t *)StubRoutines::_crc32c_table_addr+1); 10608 10609 const_or_pre_comp_const_index[3] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 2); 10610 const_or_pre_comp_const_index[2] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 3); 10611 10612 const_or_pre_comp_const_index[5] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 4); 10613 const_or_pre_comp_const_index[4] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 5); 10614 assert((CRC32C_NUM_PRECOMPUTED_CONSTANTS - 1 ) == 5, "Checking whether you declared all of the constants based on the number of \"chunks\""); 10615 } else { 10616 const_or_pre_comp_const_index[0] = 1; 10617 const_or_pre_comp_const_index[1] = 0; 10618 10619 const_or_pre_comp_const_index[2] = 3; 10620 const_or_pre_comp_const_index[3] = 2; 10621 10622 const_or_pre_comp_const_index[4] = 5; 10623 const_or_pre_comp_const_index[5] = 4; 10624 } 10625 crc32c_proc_chunk(CRC32C_HIGH, const_or_pre_comp_const_index[0], const_or_pre_comp_const_index[1], is_pclmulqdq_supported, 10626 in2, in1, in_out, 10627 tmp1, tmp2, tmp3, 10628 w_xtmp1, w_xtmp2, w_xtmp3, 10629 tmp4, tmp5, 10630 tmp6); 10631 crc32c_proc_chunk(CRC32C_MIDDLE, const_or_pre_comp_const_index[2], const_or_pre_comp_const_index[3], is_pclmulqdq_supported, 10632 in2, in1, in_out, 10633 tmp1, tmp2, tmp3, 10634 w_xtmp1, w_xtmp2, w_xtmp3, 10635 tmp4, tmp5, 10636 tmp6); 10637 crc32c_proc_chunk(CRC32C_LOW, const_or_pre_comp_const_index[4], const_or_pre_comp_const_index[5], is_pclmulqdq_supported, 10638 in2, in1, in_out, 10639 tmp1, tmp2, tmp3, 10640 w_xtmp1, w_xtmp2, w_xtmp3, 10641 tmp4, tmp5, 10642 tmp6); 10643 movl(tmp1, in2); 10644 andl(tmp1, 0x00000007); 10645 negl(tmp1); 10646 addl(tmp1, in2); 10647 addq(tmp1, in1); 10648 10649 BIND(L_wordByWord); 10650 cmpq(in1, tmp1); 10651 jcc(Assembler::greaterEqual, L_byteByByteProlog); 10652 crc32(in_out, Address(in1, 0), 4); 10653 addq(in1, 4); 10654 jmp(L_wordByWord); 10655 10656 BIND(L_byteByByteProlog); 10657 andl(in2, 0x00000007); 10658 movl(tmp2, 1); 10659 10660 BIND(L_byteByByte); 10661 cmpl(tmp2, in2); 10662 jccb(Assembler::greater, L_exit); 10663 crc32(in_out, Address(in1, 0), 1); 10664 incq(in1); 10665 incl(tmp2); 10666 jmp(L_byteByByte); 10667 10668 BIND(L_exit); 10669 } 10670 #else 10671 void MacroAssembler::crc32c_ipl_alg2_alt2(Register in_out, Register in1, Register in2, 10672 Register tmp1, Register tmp2, Register tmp3, 10673 Register tmp4, Register tmp5, Register tmp6, 10674 XMMRegister w_xtmp1, XMMRegister w_xtmp2, XMMRegister w_xtmp3, 10675 bool is_pclmulqdq_supported) { 10676 uint32_t const_or_pre_comp_const_index[CRC32C_NUM_PRECOMPUTED_CONSTANTS]; 10677 Label L_wordByWord; 10678 Label L_byteByByteProlog; 10679 Label L_byteByByte; 10680 Label L_exit; 10681 10682 if (is_pclmulqdq_supported) { 10683 const_or_pre_comp_const_index[1] = *(uint32_t *)StubRoutines::_crc32c_table_addr; 10684 const_or_pre_comp_const_index[0] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 1); 10685 10686 const_or_pre_comp_const_index[3] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 2); 10687 const_or_pre_comp_const_index[2] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 3); 10688 10689 const_or_pre_comp_const_index[5] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 4); 10690 const_or_pre_comp_const_index[4] = *((uint32_t *)StubRoutines::_crc32c_table_addr + 5); 10691 } else { 10692 const_or_pre_comp_const_index[0] = 1; 10693 const_or_pre_comp_const_index[1] = 0; 10694 10695 const_or_pre_comp_const_index[2] = 3; 10696 const_or_pre_comp_const_index[3] = 2; 10697 10698 const_or_pre_comp_const_index[4] = 5; 10699 const_or_pre_comp_const_index[5] = 4; 10700 } 10701 crc32c_proc_chunk(CRC32C_HIGH, const_or_pre_comp_const_index[0], const_or_pre_comp_const_index[1], is_pclmulqdq_supported, 10702 in2, in1, in_out, 10703 tmp1, tmp2, tmp3, 10704 w_xtmp1, w_xtmp2, w_xtmp3, 10705 tmp4, tmp5, 10706 tmp6); 10707 crc32c_proc_chunk(CRC32C_MIDDLE, const_or_pre_comp_const_index[2], const_or_pre_comp_const_index[3], is_pclmulqdq_supported, 10708 in2, in1, in_out, 10709 tmp1, tmp2, tmp3, 10710 w_xtmp1, w_xtmp2, w_xtmp3, 10711 tmp4, tmp5, 10712 tmp6); 10713 crc32c_proc_chunk(CRC32C_LOW, const_or_pre_comp_const_index[4], const_or_pre_comp_const_index[5], is_pclmulqdq_supported, 10714 in2, in1, in_out, 10715 tmp1, tmp2, tmp3, 10716 w_xtmp1, w_xtmp2, w_xtmp3, 10717 tmp4, tmp5, 10718 tmp6); 10719 movl(tmp1, in2); 10720 andl(tmp1, 0x00000007); 10721 negl(tmp1); 10722 addl(tmp1, in2); 10723 addl(tmp1, in1); 10724 10725 BIND(L_wordByWord); 10726 cmpl(in1, tmp1); 10727 jcc(Assembler::greaterEqual, L_byteByByteProlog); 10728 crc32(in_out, Address(in1,0), 4); 10729 addl(in1, 4); 10730 jmp(L_wordByWord); 10731 10732 BIND(L_byteByByteProlog); 10733 andl(in2, 0x00000007); 10734 movl(tmp2, 1); 10735 10736 BIND(L_byteByByte); 10737 cmpl(tmp2, in2); 10738 jccb(Assembler::greater, L_exit); 10739 movb(tmp1, Address(in1, 0)); 10740 crc32(in_out, tmp1, 1); 10741 incl(in1); 10742 incl(tmp2); 10743 jmp(L_byteByByte); 10744 10745 BIND(L_exit); 10746 } 10747 #endif // LP64 10748 #undef BIND 10749 #undef BLOCK_COMMENT 10750 10751 10752 // Compress char[] array to byte[]. 10753 void MacroAssembler::char_array_compress(Register src, Register dst, Register len, 10754 XMMRegister tmp1Reg, XMMRegister tmp2Reg, 10755 XMMRegister tmp3Reg, XMMRegister tmp4Reg, 10756 Register tmp5, Register result) { 10757 Label copy_chars_loop, return_length, return_zero, done; 10758 10759 // rsi: src 10760 // rdi: dst 10761 // rdx: len 10762 // rcx: tmp5 10763 // rax: result 10764 10765 // rsi holds start addr of source char[] to be compressed 10766 // rdi holds start addr of destination byte[] 10767 // rdx holds length 10768 10769 assert(len != result, ""); 10770 10771 // save length for return 10772 push(len); 10773 10774 if (UseSSE42Intrinsics) { 10775 assert(UseSSE >= 4, "SSE4 must be enabled for SSE4.2 intrinsics to be available"); 10776 Label copy_32_loop, copy_16, copy_tail; 10777 10778 movl(result, len); 10779 movl(tmp5, 0xff00ff00); // create mask to test for Unicode chars in vectors 10780 10781 // vectored compression 10782 andl(len, 0xfffffff0); // vector count (in chars) 10783 andl(result, 0x0000000f); // tail count (in chars) 10784 testl(len, len); 10785 jccb(Assembler::zero, copy_16); 10786 10787 // compress 16 chars per iter 10788 movdl(tmp1Reg, tmp5); 10789 pshufd(tmp1Reg, tmp1Reg, 0); // store Unicode mask in tmp1Reg 10790 pxor(tmp4Reg, tmp4Reg); 10791 10792 lea(src, Address(src, len, Address::times_2)); 10793 lea(dst, Address(dst, len, Address::times_1)); 10794 negptr(len); 10795 10796 bind(copy_32_loop); 10797 movdqu(tmp2Reg, Address(src, len, Address::times_2)); // load 1st 8 characters 10798 por(tmp4Reg, tmp2Reg); 10799 movdqu(tmp3Reg, Address(src, len, Address::times_2, 16)); // load next 8 characters 10800 por(tmp4Reg, tmp3Reg); 10801 ptest(tmp4Reg, tmp1Reg); // check for Unicode chars in next vector 10802 jcc(Assembler::notZero, return_zero); 10803 packuswb(tmp2Reg, tmp3Reg); // only ASCII chars; compress each to 1 byte 10804 movdqu(Address(dst, len, Address::times_1), tmp2Reg); 10805 addptr(len, 16); 10806 jcc(Assembler::notZero, copy_32_loop); 10807 10808 // compress next vector of 8 chars (if any) 10809 bind(copy_16); 10810 movl(len, result); 10811 andl(len, 0xfffffff8); // vector count (in chars) 10812 andl(result, 0x00000007); // tail count (in chars) 10813 testl(len, len); 10814 jccb(Assembler::zero, copy_tail); 10815 10816 movdl(tmp1Reg, tmp5); 10817 pshufd(tmp1Reg, tmp1Reg, 0); // store Unicode mask in tmp1Reg 10818 pxor(tmp3Reg, tmp3Reg); 10819 10820 movdqu(tmp2Reg, Address(src, 0)); 10821 ptest(tmp2Reg, tmp1Reg); // check for Unicode chars in vector 10822 jccb(Assembler::notZero, return_zero); 10823 packuswb(tmp2Reg, tmp3Reg); // only LATIN1 chars; compress each to 1 byte 10824 movq(Address(dst, 0), tmp2Reg); 10825 addptr(src, 16); 10826 addptr(dst, 8); 10827 10828 bind(copy_tail); 10829 movl(len, result); 10830 } 10831 // compress 1 char per iter 10832 testl(len, len); 10833 jccb(Assembler::zero, return_length); 10834 lea(src, Address(src, len, Address::times_2)); 10835 lea(dst, Address(dst, len, Address::times_1)); 10836 negptr(len); 10837 10838 bind(copy_chars_loop); 10839 load_unsigned_short(result, Address(src, len, Address::times_2)); 10840 testl(result, 0xff00); // check if Unicode char 10841 jccb(Assembler::notZero, return_zero); 10842 movb(Address(dst, len, Address::times_1), result); // ASCII char; compress to 1 byte 10843 increment(len); 10844 jcc(Assembler::notZero, copy_chars_loop); 10845 10846 // if compression succeeded, return length 10847 bind(return_length); 10848 pop(result); 10849 jmpb(done); 10850 10851 // if compression failed, return 0 10852 bind(return_zero); 10853 xorl(result, result); 10854 addptr(rsp, wordSize); 10855 10856 bind(done); 10857 } 10858 10859 // Inflate byte[] array to char[]. 10860 void MacroAssembler::byte_array_inflate(Register src, Register dst, Register len, 10861 XMMRegister tmp1, Register tmp2) { 10862 Label copy_chars_loop, done; 10863 10864 // rsi: src 10865 // rdi: dst 10866 // rdx: len 10867 // rcx: tmp2 10868 10869 // rsi holds start addr of source byte[] to be inflated 10870 // rdi holds start addr of destination char[] 10871 // rdx holds length 10872 assert_different_registers(src, dst, len, tmp2); 10873 10874 if (UseSSE42Intrinsics) { 10875 assert(UseSSE >= 4, "SSE4 must be enabled for SSE4.2 intrinsics to be available"); 10876 Label copy_8_loop, copy_bytes, copy_tail; 10877 10878 movl(tmp2, len); 10879 andl(tmp2, 0x00000007); // tail count (in chars) 10880 andl(len, 0xfffffff8); // vector count (in chars) 10881 jccb(Assembler::zero, copy_tail); 10882 10883 // vectored inflation 10884 lea(src, Address(src, len, Address::times_1)); 10885 lea(dst, Address(dst, len, Address::times_2)); 10886 negptr(len); 10887 10888 // inflate 8 chars per iter 10889 bind(copy_8_loop); 10890 pmovzxbw(tmp1, Address(src, len, Address::times_1)); // unpack to 8 words 10891 movdqu(Address(dst, len, Address::times_2), tmp1); 10892 addptr(len, 8); 10893 jcc(Assembler::notZero, copy_8_loop); 10894 10895 bind(copy_tail); 10896 movl(len, tmp2); 10897 10898 cmpl(len, 4); 10899 jccb(Assembler::less, copy_bytes); 10900 10901 movdl(tmp1, Address(src, 0)); // load 4 byte chars 10902 pmovzxbw(tmp1, tmp1); 10903 movq(Address(dst, 0), tmp1); 10904 subptr(len, 4); 10905 addptr(src, 4); 10906 addptr(dst, 8); 10907 10908 bind(copy_bytes); 10909 } 10910 testl(len, len); 10911 jccb(Assembler::zero, done); 10912 lea(src, Address(src, len, Address::times_1)); 10913 lea(dst, Address(dst, len, Address::times_2)); 10914 negptr(len); 10915 10916 // inflate 1 char per iter 10917 bind(copy_chars_loop); 10918 load_unsigned_byte(tmp2, Address(src, len, Address::times_1)); // load byte char 10919 movw(Address(dst, len, Address::times_2), tmp2); // inflate byte char to word 10920 increment(len); 10921 jcc(Assembler::notZero, copy_chars_loop); 10922 10923 bind(done); 10924 } 10925 10926 10927 Assembler::Condition MacroAssembler::negate_condition(Assembler::Condition cond) { 10928 switch (cond) { 10929 // Note some conditions are synonyms for others 10930 case Assembler::zero: return Assembler::notZero; 10931 case Assembler::notZero: return Assembler::zero; 10932 case Assembler::less: return Assembler::greaterEqual; 10933 case Assembler::lessEqual: return Assembler::greater; 10934 case Assembler::greater: return Assembler::lessEqual; 10935 case Assembler::greaterEqual: return Assembler::less; 10936 case Assembler::below: return Assembler::aboveEqual; 10937 case Assembler::belowEqual: return Assembler::above; 10938 case Assembler::above: return Assembler::belowEqual; 10939 case Assembler::aboveEqual: return Assembler::below; 10940 case Assembler::overflow: return Assembler::noOverflow; 10941 case Assembler::noOverflow: return Assembler::overflow; 10942 case Assembler::negative: return Assembler::positive; 10943 case Assembler::positive: return Assembler::negative; 10944 case Assembler::parity: return Assembler::noParity; 10945 case Assembler::noParity: return Assembler::parity; 10946 } 10947 ShouldNotReachHere(); return Assembler::overflow; 10948 } 10949 10950 SkipIfEqual::SkipIfEqual( 10951 MacroAssembler* masm, const bool* flag_addr, bool value) { 10952 _masm = masm; 10953 _masm->cmp8(ExternalAddress((address)flag_addr), value); 10954 _masm->jcc(Assembler::equal, _label); 10955 } 10956 10957 SkipIfEqual::~SkipIfEqual() { 10958 _masm->bind(_label); 10959 } 10960 10961 // 32-bit Windows has its own fast-path implementation 10962 // of get_thread 10963 #if !defined(WIN32) || defined(_LP64) 10964 10965 // This is simply a call to Thread::current() 10966 void MacroAssembler::get_thread(Register thread) { 10967 if (thread != rax) { 10968 push(rax); 10969 } 10970 LP64_ONLY(push(rdi);) 10971 LP64_ONLY(push(rsi);) 10972 push(rdx); 10973 push(rcx); 10974 #ifdef _LP64 10975 push(r8); 10976 push(r9); 10977 push(r10); 10978 push(r11); 10979 #endif 10980 10981 MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, Thread::current), 0); 10982 10983 #ifdef _LP64 10984 pop(r11); 10985 pop(r10); 10986 pop(r9); 10987 pop(r8); 10988 #endif 10989 pop(rcx); 10990 pop(rdx); 10991 LP64_ONLY(pop(rsi);) 10992 LP64_ONLY(pop(rdi);) 10993 if (thread != rax) { 10994 mov(thread, rax); 10995 pop(rax); 10996 } 10997 } 10998 10999 #endif