1 /* 2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2014, 2015, Red Hat Inc. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #ifndef CPU_AARCH64_VM_MACROASSEMBLER_AARCH64_HPP 27 #define CPU_AARCH64_VM_MACROASSEMBLER_AARCH64_HPP 28 29 #include "asm/assembler.hpp" 30 31 // MacroAssembler extends Assembler by frequently used macros. 32 // 33 // Instructions for which a 'better' code sequence exists depending 34 // on arguments should also go in here. 35 36 class MacroAssembler: public Assembler { 37 friend class LIR_Assembler; 38 39 public: 40 using Assembler::mov; 41 using Assembler::movi; 42 43 protected: 44 45 // Support for VM calls 46 // 47 // This is the base routine called by the different versions of call_VM_leaf. The interpreter 48 // may customize this version by overriding it for its purposes (e.g., to save/restore 49 // additional registers when doing a VM call). 50 virtual void call_VM_leaf_base( 51 address entry_point, // the entry point 52 int number_of_arguments, // the number of arguments to pop after the call 53 Label *retaddr = NULL 54 ); 55 56 virtual void call_VM_leaf_base( 57 address entry_point, // the entry point 58 int number_of_arguments, // the number of arguments to pop after the call 59 Label &retaddr) { 60 call_VM_leaf_base(entry_point, number_of_arguments, &retaddr); 61 } 62 63 // This is the base routine called by the different versions of call_VM. The interpreter 64 // may customize this version by overriding it for its purposes (e.g., to save/restore 65 // additional registers when doing a VM call). 66 // 67 // If no java_thread register is specified (noreg) than rthread will be used instead. call_VM_base 68 // returns the register which contains the thread upon return. If a thread register has been 69 // specified, the return value will correspond to that register. If no last_java_sp is specified 70 // (noreg) than rsp will be used instead. 71 virtual void call_VM_base( // returns the register containing the thread upon return 72 Register oop_result, // where an oop-result ends up if any; use noreg otherwise 73 Register java_thread, // the thread if computed before ; use noreg otherwise 74 Register last_java_sp, // to set up last_Java_frame in stubs; use noreg otherwise 75 address entry_point, // the entry point 76 int number_of_arguments, // the number of arguments (w/o thread) to pop after the call 77 bool check_exceptions // whether to check for pending exceptions after return 78 ); 79 80 void call_VM_helper(Register oop_result, address entry_point, int number_of_arguments, bool check_exceptions = true); 81 82 // True if an XOR can be used to expand narrow klass references. 83 bool use_XOR_for_compressed_class_base; 84 85 public: 86 MacroAssembler(CodeBuffer* code) : Assembler(code) { 87 use_XOR_for_compressed_class_base 88 = (operand_valid_for_logical_immediate(false /*is32*/, 89 (uint64_t)Universe::narrow_klass_base()) 90 && ((uint64_t)Universe::narrow_klass_base() 91 > (1UL << log2_intptr(Universe::narrow_klass_range())))); 92 } 93 94 // These routines should emit JVMTI PopFrame and ForceEarlyReturn handling code. 95 // The implementation is only non-empty for the InterpreterMacroAssembler, 96 // as only the interpreter handles PopFrame and ForceEarlyReturn requests. 97 virtual void check_and_handle_popframe(Register java_thread); 98 virtual void check_and_handle_earlyret(Register java_thread); 99 100 void safepoint_poll(Label& slow_path); 101 void safepoint_poll_acquire(Label& slow_path); 102 103 // Biased locking support 104 // lock_reg and obj_reg must be loaded up with the appropriate values. 105 // swap_reg is killed. 106 // tmp_reg must be supplied and must not be rscratch1 or rscratch2 107 // Optional slow case is for implementations (interpreter and C1) which branch to 108 // slow case directly. Leaves condition codes set for C2's Fast_Lock node. 109 // Returns offset of first potentially-faulting instruction for null 110 // check info (currently consumed only by C1). If 111 // swap_reg_contains_mark is true then returns -1 as it is assumed 112 // the calling code has already passed any potential faults. 113 int biased_locking_enter(Register lock_reg, Register obj_reg, 114 Register swap_reg, Register tmp_reg, 115 bool swap_reg_contains_mark, 116 Label& done, Label* slow_case = NULL, 117 BiasedLockingCounters* counters = NULL); 118 void biased_locking_exit (Register obj_reg, Register temp_reg, Label& done); 119 120 121 // Helper functions for statistics gathering. 122 // Unconditional atomic increment. 123 void atomic_incw(Register counter_addr, Register tmp, Register tmp2); 124 void atomic_incw(Address counter_addr, Register tmp1, Register tmp2, Register tmp3) { 125 lea(tmp1, counter_addr); 126 atomic_incw(tmp1, tmp2, tmp3); 127 } 128 // Load Effective Address 129 void lea(Register r, const Address &a) { 130 InstructionMark im(this); 131 code_section()->relocate(inst_mark(), a.rspec()); 132 a.lea(this, r); 133 } 134 135 void addmw(Address a, Register incr, Register scratch) { 136 ldrw(scratch, a); 137 addw(scratch, scratch, incr); 138 strw(scratch, a); 139 } 140 141 // Add constant to memory word 142 void addmw(Address a, int imm, Register scratch) { 143 ldrw(scratch, a); 144 if (imm > 0) 145 addw(scratch, scratch, (unsigned)imm); 146 else 147 subw(scratch, scratch, (unsigned)-imm); 148 strw(scratch, a); 149 } 150 151 void bind(Label& L) { 152 Assembler::bind(L); 153 code()->clear_last_insn(); 154 } 155 156 void membar(Membar_mask_bits order_constraint); 157 158 using Assembler::ldr; 159 using Assembler::str; 160 161 void ldr(Register Rx, const Address &adr); 162 void ldrw(Register Rw, const Address &adr); 163 void str(Register Rx, const Address &adr); 164 void strw(Register Rx, const Address &adr); 165 166 // Frame creation and destruction shared between JITs. 167 void build_frame(int framesize); 168 void remove_frame(int framesize); 169 170 virtual void _call_Unimplemented(address call_site) { 171 mov(rscratch2, call_site); 172 haltsim(); 173 } 174 175 #define call_Unimplemented() _call_Unimplemented((address)__PRETTY_FUNCTION__) 176 177 virtual void notify(int type); 178 179 // aliases defined in AARCH64 spec 180 181 template<class T> 182 inline void cmpw(Register Rd, T imm) { subsw(zr, Rd, imm); } 183 184 inline void cmp(Register Rd, unsigned char imm8) { subs(zr, Rd, imm8); } 185 inline void cmp(Register Rd, unsigned imm) __attribute__ ((deprecated)); 186 187 inline void cmnw(Register Rd, unsigned imm) { addsw(zr, Rd, imm); } 188 inline void cmn(Register Rd, unsigned imm) { adds(zr, Rd, imm); } 189 190 void cset(Register Rd, Assembler::Condition cond) { 191 csinc(Rd, zr, zr, ~cond); 192 } 193 void csetw(Register Rd, Assembler::Condition cond) { 194 csincw(Rd, zr, zr, ~cond); 195 } 196 197 void cneg(Register Rd, Register Rn, Assembler::Condition cond) { 198 csneg(Rd, Rn, Rn, ~cond); 199 } 200 void cnegw(Register Rd, Register Rn, Assembler::Condition cond) { 201 csnegw(Rd, Rn, Rn, ~cond); 202 } 203 204 inline void movw(Register Rd, Register Rn) { 205 if (Rd == sp || Rn == sp) { 206 addw(Rd, Rn, 0U); 207 } else { 208 orrw(Rd, zr, Rn); 209 } 210 } 211 inline void mov(Register Rd, Register Rn) { 212 assert(Rd != r31_sp && Rn != r31_sp, "should be"); 213 if (Rd == Rn) { 214 } else if (Rd == sp || Rn == sp) { 215 add(Rd, Rn, 0U); 216 } else { 217 orr(Rd, zr, Rn); 218 } 219 } 220 221 inline void moviw(Register Rd, unsigned imm) { orrw(Rd, zr, imm); } 222 inline void movi(Register Rd, unsigned imm) { orr(Rd, zr, imm); } 223 224 inline void tstw(Register Rd, Register Rn) { andsw(zr, Rd, Rn); } 225 inline void tst(Register Rd, Register Rn) { ands(zr, Rd, Rn); } 226 227 inline void tstw(Register Rd, uint64_t imm) { andsw(zr, Rd, imm); } 228 inline void tst(Register Rd, uint64_t imm) { ands(zr, Rd, imm); } 229 230 inline void bfiw(Register Rd, Register Rn, unsigned lsb, unsigned width) { 231 bfmw(Rd, Rn, ((32 - lsb) & 31), (width - 1)); 232 } 233 inline void bfi(Register Rd, Register Rn, unsigned lsb, unsigned width) { 234 bfm(Rd, Rn, ((64 - lsb) & 63), (width - 1)); 235 } 236 237 inline void bfxilw(Register Rd, Register Rn, unsigned lsb, unsigned width) { 238 bfmw(Rd, Rn, lsb, (lsb + width - 1)); 239 } 240 inline void bfxil(Register Rd, Register Rn, unsigned lsb, unsigned width) { 241 bfm(Rd, Rn, lsb , (lsb + width - 1)); 242 } 243 244 inline void sbfizw(Register Rd, Register Rn, unsigned lsb, unsigned width) { 245 sbfmw(Rd, Rn, ((32 - lsb) & 31), (width - 1)); 246 } 247 inline void sbfiz(Register Rd, Register Rn, unsigned lsb, unsigned width) { 248 sbfm(Rd, Rn, ((64 - lsb) & 63), (width - 1)); 249 } 250 251 inline void sbfxw(Register Rd, Register Rn, unsigned lsb, unsigned width) { 252 sbfmw(Rd, Rn, lsb, (lsb + width - 1)); 253 } 254 inline void sbfx(Register Rd, Register Rn, unsigned lsb, unsigned width) { 255 sbfm(Rd, Rn, lsb , (lsb + width - 1)); 256 } 257 258 inline void ubfizw(Register Rd, Register Rn, unsigned lsb, unsigned width) { 259 ubfmw(Rd, Rn, ((32 - lsb) & 31), (width - 1)); 260 } 261 inline void ubfiz(Register Rd, Register Rn, unsigned lsb, unsigned width) { 262 ubfm(Rd, Rn, ((64 - lsb) & 63), (width - 1)); 263 } 264 265 inline void ubfxw(Register Rd, Register Rn, unsigned lsb, unsigned width) { 266 ubfmw(Rd, Rn, lsb, (lsb + width - 1)); 267 } 268 inline void ubfx(Register Rd, Register Rn, unsigned lsb, unsigned width) { 269 ubfm(Rd, Rn, lsb , (lsb + width - 1)); 270 } 271 272 inline void asrw(Register Rd, Register Rn, unsigned imm) { 273 sbfmw(Rd, Rn, imm, 31); 274 } 275 276 inline void asr(Register Rd, Register Rn, unsigned imm) { 277 sbfm(Rd, Rn, imm, 63); 278 } 279 280 inline void lslw(Register Rd, Register Rn, unsigned imm) { 281 ubfmw(Rd, Rn, ((32 - imm) & 31), (31 - imm)); 282 } 283 284 inline void lsl(Register Rd, Register Rn, unsigned imm) { 285 ubfm(Rd, Rn, ((64 - imm) & 63), (63 - imm)); 286 } 287 288 inline void lsrw(Register Rd, Register Rn, unsigned imm) { 289 ubfmw(Rd, Rn, imm, 31); 290 } 291 292 inline void lsr(Register Rd, Register Rn, unsigned imm) { 293 ubfm(Rd, Rn, imm, 63); 294 } 295 296 inline void rorw(Register Rd, Register Rn, unsigned imm) { 297 extrw(Rd, Rn, Rn, imm); 298 } 299 300 inline void ror(Register Rd, Register Rn, unsigned imm) { 301 extr(Rd, Rn, Rn, imm); 302 } 303 304 inline void sxtbw(Register Rd, Register Rn) { 305 sbfmw(Rd, Rn, 0, 7); 306 } 307 inline void sxthw(Register Rd, Register Rn) { 308 sbfmw(Rd, Rn, 0, 15); 309 } 310 inline void sxtb(Register Rd, Register Rn) { 311 sbfm(Rd, Rn, 0, 7); 312 } 313 inline void sxth(Register Rd, Register Rn) { 314 sbfm(Rd, Rn, 0, 15); 315 } 316 inline void sxtw(Register Rd, Register Rn) { 317 sbfm(Rd, Rn, 0, 31); 318 } 319 320 inline void uxtbw(Register Rd, Register Rn) { 321 ubfmw(Rd, Rn, 0, 7); 322 } 323 inline void uxthw(Register Rd, Register Rn) { 324 ubfmw(Rd, Rn, 0, 15); 325 } 326 inline void uxtb(Register Rd, Register Rn) { 327 ubfm(Rd, Rn, 0, 7); 328 } 329 inline void uxth(Register Rd, Register Rn) { 330 ubfm(Rd, Rn, 0, 15); 331 } 332 inline void uxtw(Register Rd, Register Rn) { 333 ubfm(Rd, Rn, 0, 31); 334 } 335 336 inline void cmnw(Register Rn, Register Rm) { 337 addsw(zr, Rn, Rm); 338 } 339 inline void cmn(Register Rn, Register Rm) { 340 adds(zr, Rn, Rm); 341 } 342 343 inline void cmpw(Register Rn, Register Rm) { 344 subsw(zr, Rn, Rm); 345 } 346 inline void cmp(Register Rn, Register Rm) { 347 subs(zr, Rn, Rm); 348 } 349 350 inline void negw(Register Rd, Register Rn) { 351 subw(Rd, zr, Rn); 352 } 353 354 inline void neg(Register Rd, Register Rn) { 355 sub(Rd, zr, Rn); 356 } 357 358 inline void negsw(Register Rd, Register Rn) { 359 subsw(Rd, zr, Rn); 360 } 361 362 inline void negs(Register Rd, Register Rn) { 363 subs(Rd, zr, Rn); 364 } 365 366 inline void cmnw(Register Rn, Register Rm, enum shift_kind kind, unsigned shift = 0) { 367 addsw(zr, Rn, Rm, kind, shift); 368 } 369 inline void cmn(Register Rn, Register Rm, enum shift_kind kind, unsigned shift = 0) { 370 adds(zr, Rn, Rm, kind, shift); 371 } 372 373 inline void cmpw(Register Rn, Register Rm, enum shift_kind kind, unsigned shift = 0) { 374 subsw(zr, Rn, Rm, kind, shift); 375 } 376 inline void cmp(Register Rn, Register Rm, enum shift_kind kind, unsigned shift = 0) { 377 subs(zr, Rn, Rm, kind, shift); 378 } 379 380 inline void negw(Register Rd, Register Rn, enum shift_kind kind, unsigned shift = 0) { 381 subw(Rd, zr, Rn, kind, shift); 382 } 383 384 inline void neg(Register Rd, Register Rn, enum shift_kind kind, unsigned shift = 0) { 385 sub(Rd, zr, Rn, kind, shift); 386 } 387 388 inline void negsw(Register Rd, Register Rn, enum shift_kind kind, unsigned shift = 0) { 389 subsw(Rd, zr, Rn, kind, shift); 390 } 391 392 inline void negs(Register Rd, Register Rn, enum shift_kind kind, unsigned shift = 0) { 393 subs(Rd, zr, Rn, kind, shift); 394 } 395 396 inline void mnegw(Register Rd, Register Rn, Register Rm) { 397 msubw(Rd, Rn, Rm, zr); 398 } 399 inline void mneg(Register Rd, Register Rn, Register Rm) { 400 msub(Rd, Rn, Rm, zr); 401 } 402 403 inline void mulw(Register Rd, Register Rn, Register Rm) { 404 maddw(Rd, Rn, Rm, zr); 405 } 406 inline void mul(Register Rd, Register Rn, Register Rm) { 407 madd(Rd, Rn, Rm, zr); 408 } 409 410 inline void smnegl(Register Rd, Register Rn, Register Rm) { 411 smsubl(Rd, Rn, Rm, zr); 412 } 413 inline void smull(Register Rd, Register Rn, Register Rm) { 414 smaddl(Rd, Rn, Rm, zr); 415 } 416 417 inline void umnegl(Register Rd, Register Rn, Register Rm) { 418 umsubl(Rd, Rn, Rm, zr); 419 } 420 inline void umull(Register Rd, Register Rn, Register Rm) { 421 umaddl(Rd, Rn, Rm, zr); 422 } 423 424 #define WRAP(INSN) \ 425 void INSN(Register Rd, Register Rn, Register Rm, Register Ra) { \ 426 if ((VM_Version::features() & VM_Version::CPU_A53MAC) && Ra != zr) \ 427 nop(); \ 428 Assembler::INSN(Rd, Rn, Rm, Ra); \ 429 } 430 431 WRAP(madd) WRAP(msub) WRAP(maddw) WRAP(msubw) 432 WRAP(smaddl) WRAP(smsubl) WRAP(umaddl) WRAP(umsubl) 433 #undef WRAP 434 435 436 // macro assembly operations needed for aarch64 437 438 // first two private routines for loading 32 bit or 64 bit constants 439 private: 440 441 void mov_immediate64(Register dst, u_int64_t imm64); 442 void mov_immediate32(Register dst, u_int32_t imm32); 443 444 int push(unsigned int bitset, Register stack); 445 int pop(unsigned int bitset, Register stack); 446 447 void mov(Register dst, Address a); 448 449 public: 450 void push(RegSet regs, Register stack) { if (regs.bits()) push(regs.bits(), stack); } 451 void pop(RegSet regs, Register stack) { if (regs.bits()) pop(regs.bits(), stack); } 452 453 // Push and pop everything that might be clobbered by a native 454 // runtime call except rscratch1 and rscratch2. (They are always 455 // scratch, so we don't have to protect them.) Only save the lower 456 // 64 bits of each vector register. 457 void push_call_clobbered_registers(); 458 void pop_call_clobbered_registers(); 459 460 // now mov instructions for loading absolute addresses and 32 or 461 // 64 bit integers 462 463 inline void mov(Register dst, address addr) 464 { 465 mov_immediate64(dst, (u_int64_t)addr); 466 } 467 468 inline void mov(Register dst, u_int64_t imm64) 469 { 470 mov_immediate64(dst, imm64); 471 } 472 473 inline void movw(Register dst, u_int32_t imm32) 474 { 475 mov_immediate32(dst, imm32); 476 } 477 478 inline void mov(Register dst, long l) 479 { 480 mov(dst, (u_int64_t)l); 481 } 482 483 inline void mov(Register dst, int i) 484 { 485 mov(dst, (long)i); 486 } 487 488 void mov(Register dst, RegisterOrConstant src) { 489 if (src.is_register()) 490 mov(dst, src.as_register()); 491 else 492 mov(dst, src.as_constant()); 493 } 494 495 void movptr(Register r, uintptr_t imm64); 496 497 void mov(FloatRegister Vd, SIMD_Arrangement T, u_int32_t imm32); 498 499 void mov(FloatRegister Vd, SIMD_Arrangement T, FloatRegister Vn) { 500 orr(Vd, T, Vn, Vn); 501 } 502 503 public: 504 505 // Generalized Test Bit And Branch, including a "far" variety which 506 // spans more than 32KiB. 507 void tbr(Condition cond, Register Rt, int bitpos, Label &dest, bool far = false) { 508 assert(cond == EQ || cond == NE, "must be"); 509 510 if (far) 511 cond = ~cond; 512 513 void (Assembler::* branch)(Register Rt, int bitpos, Label &L); 514 if (cond == Assembler::EQ) 515 branch = &Assembler::tbz; 516 else 517 branch = &Assembler::tbnz; 518 519 if (far) { 520 Label L; 521 (this->*branch)(Rt, bitpos, L); 522 b(dest); 523 bind(L); 524 } else { 525 (this->*branch)(Rt, bitpos, dest); 526 } 527 } 528 529 // macro instructions for accessing and updating floating point 530 // status register 531 // 532 // FPSR : op1 == 011 533 // CRn == 0100 534 // CRm == 0100 535 // op2 == 001 536 537 inline void get_fpsr(Register reg) 538 { 539 mrs(0b11, 0b0100, 0b0100, 0b001, reg); 540 } 541 542 inline void set_fpsr(Register reg) 543 { 544 msr(0b011, 0b0100, 0b0100, 0b001, reg); 545 } 546 547 inline void clear_fpsr() 548 { 549 msr(0b011, 0b0100, 0b0100, 0b001, zr); 550 } 551 552 // DCZID_EL0: op1 == 011 553 // CRn == 0000 554 // CRm == 0000 555 // op2 == 111 556 inline void get_dczid_el0(Register reg) 557 { 558 mrs(0b011, 0b0000, 0b0000, 0b111, reg); 559 } 560 561 // CTR_EL0: op1 == 011 562 // CRn == 0000 563 // CRm == 0000 564 // op2 == 001 565 inline void get_ctr_el0(Register reg) 566 { 567 mrs(0b011, 0b0000, 0b0000, 0b001, reg); 568 } 569 570 // idiv variant which deals with MINLONG as dividend and -1 as divisor 571 int corrected_idivl(Register result, Register ra, Register rb, 572 bool want_remainder, Register tmp = rscratch1); 573 int corrected_idivq(Register result, Register ra, Register rb, 574 bool want_remainder, Register tmp = rscratch1); 575 576 // Support for NULL-checks 577 // 578 // Generates code that causes a NULL OS exception if the content of reg is NULL. 579 // If the accessed location is M[reg + offset] and the offset is known, provide the 580 // offset. No explicit code generation is needed if the offset is within a certain 581 // range (0 <= offset <= page_size). 582 583 virtual void null_check(Register reg, int offset = -1); 584 static bool needs_explicit_null_check(intptr_t offset); 585 static bool uses_implicit_null_check(void* address); 586 587 static address target_addr_for_insn(address insn_addr, unsigned insn); 588 static address target_addr_for_insn(address insn_addr) { 589 unsigned insn = *(unsigned*)insn_addr; 590 return target_addr_for_insn(insn_addr, insn); 591 } 592 593 // Required platform-specific helpers for Label::patch_instructions. 594 // They _shadow_ the declarations in AbstractAssembler, which are undefined. 595 static int pd_patch_instruction_size(address branch, address target); 596 static void pd_patch_instruction(address branch, address target, const char* file = NULL, int line = 0) { 597 pd_patch_instruction_size(branch, target); 598 } 599 static address pd_call_destination(address branch) { 600 return target_addr_for_insn(branch); 601 } 602 #ifndef PRODUCT 603 static void pd_print_patched_instruction(address branch); 604 #endif 605 606 static int patch_oop(address insn_addr, address o); 607 static int patch_narrow_klass(address insn_addr, narrowKlass n); 608 609 address emit_trampoline_stub(int insts_call_instruction_offset, address target); 610 611 // The following 4 methods return the offset of the appropriate move instruction 612 613 // Support for fast byte/short loading with zero extension (depending on particular CPU) 614 int load_unsigned_byte(Register dst, Address src); 615 int load_unsigned_short(Register dst, Address src); 616 617 // Support for fast byte/short loading with sign extension (depending on particular CPU) 618 int load_signed_byte(Register dst, Address src); 619 int load_signed_short(Register dst, Address src); 620 621 int load_signed_byte32(Register dst, Address src); 622 int load_signed_short32(Register dst, Address src); 623 624 // Support for sign-extension (hi:lo = extend_sign(lo)) 625 void extend_sign(Register hi, Register lo); 626 627 // Load and store values by size and signed-ness 628 void load_sized_value(Register dst, Address src, size_t size_in_bytes, bool is_signed, Register dst2 = noreg); 629 void store_sized_value(Address dst, Register src, size_t size_in_bytes, Register src2 = noreg); 630 631 // Support for inc/dec with optimal instruction selection depending on value 632 633 // x86_64 aliases an unqualified register/address increment and 634 // decrement to call incrementq and decrementq but also supports 635 // explicitly sized calls to incrementq/decrementq or 636 // incrementl/decrementl 637 638 // for aarch64 the proper convention would be to use 639 // increment/decrement for 64 bit operatons and 640 // incrementw/decrementw for 32 bit operations. so when porting 641 // x86_64 code we can leave calls to increment/decrement as is, 642 // replace incrementq/decrementq with increment/decrement and 643 // replace incrementl/decrementl with incrementw/decrementw. 644 645 // n.b. increment/decrement calls with an Address destination will 646 // need to use a scratch register to load the value to be 647 // incremented. increment/decrement calls which add or subtract a 648 // constant value greater than 2^12 will need to use a 2nd scratch 649 // register to hold the constant. so, a register increment/decrement 650 // may trash rscratch2 and an address increment/decrement trash 651 // rscratch and rscratch2 652 653 void decrementw(Address dst, int value = 1); 654 void decrementw(Register reg, int value = 1); 655 656 void decrement(Register reg, int value = 1); 657 void decrement(Address dst, int value = 1); 658 659 void incrementw(Address dst, int value = 1); 660 void incrementw(Register reg, int value = 1); 661 662 void increment(Register reg, int value = 1); 663 void increment(Address dst, int value = 1); 664 665 666 // Alignment 667 void align(int modulus); 668 669 // Stack frame creation/removal 670 void enter() 671 { 672 stp(rfp, lr, Address(pre(sp, -2 * wordSize))); 673 mov(rfp, sp); 674 } 675 void leave() 676 { 677 mov(sp, rfp); 678 ldp(rfp, lr, Address(post(sp, 2 * wordSize))); 679 } 680 681 // Support for getting the JavaThread pointer (i.e.; a reference to thread-local information) 682 // The pointer will be loaded into the thread register. 683 void get_thread(Register thread); 684 685 686 // Support for VM calls 687 // 688 // It is imperative that all calls into the VM are handled via the call_VM macros. 689 // They make sure that the stack linkage is setup correctly. call_VM's correspond 690 // to ENTRY/ENTRY_X entry points while call_VM_leaf's correspond to LEAF entry points. 691 692 693 void call_VM(Register oop_result, 694 address entry_point, 695 bool check_exceptions = true); 696 void call_VM(Register oop_result, 697 address entry_point, 698 Register arg_1, 699 bool check_exceptions = true); 700 void call_VM(Register oop_result, 701 address entry_point, 702 Register arg_1, Register arg_2, 703 bool check_exceptions = true); 704 void call_VM(Register oop_result, 705 address entry_point, 706 Register arg_1, Register arg_2, Register arg_3, 707 bool check_exceptions = true); 708 709 // Overloadings with last_Java_sp 710 void call_VM(Register oop_result, 711 Register last_java_sp, 712 address entry_point, 713 int number_of_arguments = 0, 714 bool check_exceptions = true); 715 void call_VM(Register oop_result, 716 Register last_java_sp, 717 address entry_point, 718 Register arg_1, bool 719 check_exceptions = true); 720 void call_VM(Register oop_result, 721 Register last_java_sp, 722 address entry_point, 723 Register arg_1, Register arg_2, 724 bool check_exceptions = true); 725 void call_VM(Register oop_result, 726 Register last_java_sp, 727 address entry_point, 728 Register arg_1, Register arg_2, Register arg_3, 729 bool check_exceptions = true); 730 731 void get_vm_result (Register oop_result, Register thread); 732 void get_vm_result_2(Register metadata_result, Register thread); 733 734 // These always tightly bind to MacroAssembler::call_VM_base 735 // bypassing the virtual implementation 736 void super_call_VM(Register oop_result, Register last_java_sp, address entry_point, int number_of_arguments = 0, bool check_exceptions = true); 737 void super_call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, bool check_exceptions = true); 738 void super_call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, Register arg_2, bool check_exceptions = true); 739 void super_call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, Register arg_2, Register arg_3, bool check_exceptions = true); 740 void super_call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, Register arg_2, Register arg_3, Register arg_4, bool check_exceptions = true); 741 742 void call_VM_leaf(address entry_point, 743 int number_of_arguments = 0); 744 void call_VM_leaf(address entry_point, 745 Register arg_1); 746 void call_VM_leaf(address entry_point, 747 Register arg_1, Register arg_2); 748 void call_VM_leaf(address entry_point, 749 Register arg_1, Register arg_2, Register arg_3); 750 751 // These always tightly bind to MacroAssembler::call_VM_leaf_base 752 // bypassing the virtual implementation 753 void super_call_VM_leaf(address entry_point); 754 void super_call_VM_leaf(address entry_point, Register arg_1); 755 void super_call_VM_leaf(address entry_point, Register arg_1, Register arg_2); 756 void super_call_VM_leaf(address entry_point, Register arg_1, Register arg_2, Register arg_3); 757 void super_call_VM_leaf(address entry_point, Register arg_1, Register arg_2, Register arg_3, Register arg_4); 758 759 // last Java Frame (fills frame anchor) 760 void set_last_Java_frame(Register last_java_sp, 761 Register last_java_fp, 762 address last_java_pc, 763 Register scratch); 764 765 void set_last_Java_frame(Register last_java_sp, 766 Register last_java_fp, 767 Label &last_java_pc, 768 Register scratch); 769 770 void set_last_Java_frame(Register last_java_sp, 771 Register last_java_fp, 772 Register last_java_pc, 773 Register scratch); 774 775 void reset_last_Java_frame(Register thread); 776 777 // thread in the default location (rthread) 778 void reset_last_Java_frame(bool clear_fp); 779 780 // Stores 781 void store_check(Register obj); // store check for obj - register is destroyed afterwards 782 void store_check(Register obj, Address dst); // same as above, dst is exact store location (reg. is destroyed) 783 784 void resolve_jobject(Register value, Register thread, Register tmp); 785 786 // C 'boolean' to Java boolean: x == 0 ? 0 : 1 787 void c2bool(Register x); 788 789 // oop manipulations 790 void load_klass(Register dst, Register src); 791 void store_klass(Register dst, Register src); 792 void cmp_klass(Register oop, Register trial_klass, Register tmp); 793 794 void resolve_oop_handle(Register result, Register tmp = r5); 795 void load_mirror(Register dst, Register method, Register tmp = r5); 796 797 void access_load_at(BasicType type, DecoratorSet decorators, Register dst, Address src, 798 Register tmp1, Register tmp_thread); 799 800 void access_store_at(BasicType type, DecoratorSet decorators, Address dst, Register src, 801 Register tmp1, Register tmp_thread); 802 803 // Resolves obj for access. Result is placed in the same register. 804 // All other registers are preserved. 805 void resolve(DecoratorSet decorators, Register obj); 806 807 void load_heap_oop(Register dst, Address src, Register tmp1 = noreg, 808 Register thread_tmp = noreg, DecoratorSet decorators = 0); 809 810 void load_heap_oop_not_null(Register dst, Address src, Register tmp1 = noreg, 811 Register thread_tmp = noreg, DecoratorSet decorators = 0); 812 void store_heap_oop(Address dst, Register src, Register tmp1 = noreg, 813 Register tmp_thread = noreg, DecoratorSet decorators = 0); 814 815 // currently unimplemented 816 // Used for storing NULL. All other oop constants should be 817 // stored using routines that take a jobject. 818 void store_heap_oop_null(Address dst); 819 820 void load_prototype_header(Register dst, Register src); 821 822 void store_klass_gap(Register dst, Register src); 823 824 // This dummy is to prevent a call to store_heap_oop from 825 // converting a zero (like NULL) into a Register by giving 826 // the compiler two choices it can't resolve 827 828 void store_heap_oop(Address dst, void* dummy); 829 830 void encode_heap_oop(Register d, Register s); 831 void encode_heap_oop(Register r) { encode_heap_oop(r, r); } 832 void decode_heap_oop(Register d, Register s); 833 void decode_heap_oop(Register r) { decode_heap_oop(r, r); } 834 void encode_heap_oop_not_null(Register r); 835 void decode_heap_oop_not_null(Register r); 836 void encode_heap_oop_not_null(Register dst, Register src); 837 void decode_heap_oop_not_null(Register dst, Register src); 838 839 void set_narrow_oop(Register dst, jobject obj); 840 841 void encode_klass_not_null(Register r); 842 void decode_klass_not_null(Register r); 843 void encode_klass_not_null(Register dst, Register src); 844 void decode_klass_not_null(Register dst, Register src); 845 846 void set_narrow_klass(Register dst, Klass* k); 847 848 // if heap base register is used - reinit it with the correct value 849 void reinit_heapbase(); 850 851 DEBUG_ONLY(void verify_heapbase(const char* msg);) 852 853 void push_CPU_state(bool save_vectors = false); 854 void pop_CPU_state(bool restore_vectors = false) ; 855 856 // Round up to a power of two 857 void round_to(Register reg, int modulus); 858 859 // allocation 860 void eden_allocate( 861 Register obj, // result: pointer to object after successful allocation 862 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise 863 int con_size_in_bytes, // object size in bytes if known at compile time 864 Register t1, // temp register 865 Label& slow_case // continuation point if fast allocation fails 866 ); 867 void tlab_allocate( 868 Register obj, // result: pointer to object after successful allocation 869 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise 870 int con_size_in_bytes, // object size in bytes if known at compile time 871 Register t1, // temp register 872 Register t2, // temp register 873 Label& slow_case // continuation point if fast allocation fails 874 ); 875 void zero_memory(Register addr, Register len, Register t1); 876 void verify_tlab(); 877 878 // interface method calling 879 void lookup_interface_method(Register recv_klass, 880 Register intf_klass, 881 RegisterOrConstant itable_index, 882 Register method_result, 883 Register scan_temp, 884 Label& no_such_interface, 885 bool return_method = true); 886 887 // virtual method calling 888 // n.b. x86 allows RegisterOrConstant for vtable_index 889 void lookup_virtual_method(Register recv_klass, 890 RegisterOrConstant vtable_index, 891 Register method_result); 892 893 // Test sub_klass against super_klass, with fast and slow paths. 894 895 // The fast path produces a tri-state answer: yes / no / maybe-slow. 896 // One of the three labels can be NULL, meaning take the fall-through. 897 // If super_check_offset is -1, the value is loaded up from super_klass. 898 // No registers are killed, except temp_reg. 899 void check_klass_subtype_fast_path(Register sub_klass, 900 Register super_klass, 901 Register temp_reg, 902 Label* L_success, 903 Label* L_failure, 904 Label* L_slow_path, 905 RegisterOrConstant super_check_offset = RegisterOrConstant(-1)); 906 907 // The rest of the type check; must be wired to a corresponding fast path. 908 // It does not repeat the fast path logic, so don't use it standalone. 909 // The temp_reg and temp2_reg can be noreg, if no temps are available. 910 // Updates the sub's secondary super cache as necessary. 911 // If set_cond_codes, condition codes will be Z on success, NZ on failure. 912 void check_klass_subtype_slow_path(Register sub_klass, 913 Register super_klass, 914 Register temp_reg, 915 Register temp2_reg, 916 Label* L_success, 917 Label* L_failure, 918 bool set_cond_codes = false); 919 920 // Simplified, combined version, good for typical uses. 921 // Falls through on failure. 922 void check_klass_subtype(Register sub_klass, 923 Register super_klass, 924 Register temp_reg, 925 Label& L_success); 926 927 Address argument_address(RegisterOrConstant arg_slot, int extra_slot_offset = 0); 928 929 930 // Debugging 931 932 // only if +VerifyOops 933 void verify_oop(Register reg, const char* s = "broken oop"); 934 void verify_oop_addr(Address addr, const char * s = "broken oop addr"); 935 936 // TODO: verify method and klass metadata (compare against vptr?) 937 void _verify_method_ptr(Register reg, const char * msg, const char * file, int line) {} 938 void _verify_klass_ptr(Register reg, const char * msg, const char * file, int line){} 939 940 #define verify_method_ptr(reg) _verify_method_ptr(reg, "broken method " #reg, __FILE__, __LINE__) 941 #define verify_klass_ptr(reg) _verify_klass_ptr(reg, "broken klass " #reg, __FILE__, __LINE__) 942 943 // only if +VerifyFPU 944 void verify_FPU(int stack_depth, const char* s = "illegal FPU state"); 945 946 // prints msg, dumps registers and stops execution 947 void stop(const char* msg); 948 949 // prints msg and continues 950 void warn(const char* msg); 951 952 static void debug64(char* msg, int64_t pc, int64_t regs[]); 953 954 void untested() { stop("untested"); } 955 956 void unimplemented(const char* what = ""); 957 958 void should_not_reach_here() { stop("should not reach here"); } 959 960 // Stack overflow checking 961 void bang_stack_with_offset(int offset) { 962 // stack grows down, caller passes positive offset 963 assert(offset > 0, "must bang with negative offset"); 964 sub(rscratch2, sp, offset); 965 str(zr, Address(rscratch2)); 966 } 967 968 // Writes to stack successive pages until offset reached to check for 969 // stack overflow + shadow pages. Also, clobbers tmp 970 void bang_stack_size(Register size, Register tmp); 971 972 // Check for reserved stack access in method being exited (for JIT) 973 void reserved_stack_check(); 974 975 virtual RegisterOrConstant delayed_value_impl(intptr_t* delayed_value_addr, 976 Register tmp, 977 int offset); 978 979 // Arithmetics 980 981 void addptr(const Address &dst, int32_t src); 982 void cmpptr(Register src1, Address src2); 983 984 void cmpoop(Register obj1, Register obj2); 985 986 // Various forms of CAS 987 988 void cmpxchg_obj_header(Register oldv, Register newv, Register obj, Register tmp, 989 Label &suceed, Label *fail); 990 void cmpxchgptr(Register oldv, Register newv, Register addr, Register tmp, 991 Label &suceed, Label *fail); 992 993 void cmpxchgw(Register oldv, Register newv, Register addr, Register tmp, 994 Label &suceed, Label *fail); 995 996 void atomic_add(Register prev, RegisterOrConstant incr, Register addr); 997 void atomic_addw(Register prev, RegisterOrConstant incr, Register addr); 998 void atomic_addal(Register prev, RegisterOrConstant incr, Register addr); 999 void atomic_addalw(Register prev, RegisterOrConstant incr, Register addr); 1000 1001 void atomic_xchg(Register prev, Register newv, Register addr); 1002 void atomic_xchgw(Register prev, Register newv, Register addr); 1003 void atomic_xchgal(Register prev, Register newv, Register addr); 1004 void atomic_xchgalw(Register prev, Register newv, Register addr); 1005 1006 void orptr(Address adr, RegisterOrConstant src) { 1007 ldr(rscratch1, adr); 1008 if (src.is_register()) 1009 orr(rscratch1, rscratch1, src.as_register()); 1010 else 1011 orr(rscratch1, rscratch1, src.as_constant()); 1012 str(rscratch1, adr); 1013 } 1014 1015 // A generic CAS; success or failure is in the EQ flag. 1016 // Clobbers rscratch1 1017 void cmpxchg(Register addr, Register expected, Register new_val, 1018 enum operand_size size, 1019 bool acquire, bool release, bool weak, 1020 Register result); 1021 private: 1022 void compare_eq(Register rn, Register rm, enum operand_size size); 1023 1024 public: 1025 // Calls 1026 1027 address trampoline_call(Address entry, CodeBuffer *cbuf = NULL); 1028 1029 static bool far_branches() { 1030 return ReservedCodeCacheSize > branch_range || UseAOT; 1031 } 1032 1033 // Jumps that can reach anywhere in the code cache. 1034 // Trashes tmp. 1035 void far_call(Address entry, CodeBuffer *cbuf = NULL, Register tmp = rscratch1); 1036 void far_jump(Address entry, CodeBuffer *cbuf = NULL, Register tmp = rscratch1); 1037 1038 static int far_branch_size() { 1039 if (far_branches()) { 1040 return 3 * 4; // adrp, add, br 1041 } else { 1042 return 4; 1043 } 1044 } 1045 1046 // Emit the CompiledIC call idiom 1047 address ic_call(address entry, jint method_index = 0); 1048 1049 public: 1050 1051 // Data 1052 1053 void mov_metadata(Register dst, Metadata* obj); 1054 Address allocate_metadata_address(Metadata* obj); 1055 Address constant_oop_address(jobject obj); 1056 1057 void movoop(Register dst, jobject obj, bool immediate = false); 1058 1059 // CRC32 code for java.util.zip.CRC32::updateBytes() instrinsic. 1060 void kernel_crc32(Register crc, Register buf, Register len, 1061 Register table0, Register table1, Register table2, Register table3, 1062 Register tmp, Register tmp2, Register tmp3); 1063 // CRC32 code for java.util.zip.CRC32C::updateBytes() instrinsic. 1064 void kernel_crc32c(Register crc, Register buf, Register len, 1065 Register table0, Register table1, Register table2, Register table3, 1066 Register tmp, Register tmp2, Register tmp3); 1067 1068 // Stack push and pop individual 64 bit registers 1069 void push(Register src); 1070 void pop(Register dst); 1071 1072 // push all registers onto the stack 1073 void pusha(); 1074 void popa(); 1075 1076 void repne_scan(Register addr, Register value, Register count, 1077 Register scratch); 1078 void repne_scanw(Register addr, Register value, Register count, 1079 Register scratch); 1080 1081 typedef void (MacroAssembler::* add_sub_imm_insn)(Register Rd, Register Rn, unsigned imm); 1082 typedef void (MacroAssembler::* add_sub_reg_insn)(Register Rd, Register Rn, Register Rm, enum shift_kind kind, unsigned shift); 1083 1084 // If a constant does not fit in an immediate field, generate some 1085 // number of MOV instructions and then perform the operation 1086 void wrap_add_sub_imm_insn(Register Rd, Register Rn, unsigned imm, 1087 add_sub_imm_insn insn1, 1088 add_sub_reg_insn insn2); 1089 // Seperate vsn which sets the flags 1090 void wrap_adds_subs_imm_insn(Register Rd, Register Rn, unsigned imm, 1091 add_sub_imm_insn insn1, 1092 add_sub_reg_insn insn2); 1093 1094 #define WRAP(INSN) \ 1095 void INSN(Register Rd, Register Rn, unsigned imm) { \ 1096 wrap_add_sub_imm_insn(Rd, Rn, imm, &Assembler::INSN, &Assembler::INSN); \ 1097 } \ 1098 \ 1099 void INSN(Register Rd, Register Rn, Register Rm, \ 1100 enum shift_kind kind, unsigned shift = 0) { \ 1101 Assembler::INSN(Rd, Rn, Rm, kind, shift); \ 1102 } \ 1103 \ 1104 void INSN(Register Rd, Register Rn, Register Rm) { \ 1105 Assembler::INSN(Rd, Rn, Rm); \ 1106 } \ 1107 \ 1108 void INSN(Register Rd, Register Rn, Register Rm, \ 1109 ext::operation option, int amount = 0) { \ 1110 Assembler::INSN(Rd, Rn, Rm, option, amount); \ 1111 } 1112 1113 WRAP(add) WRAP(addw) WRAP(sub) WRAP(subw) 1114 1115 #undef WRAP 1116 #define WRAP(INSN) \ 1117 void INSN(Register Rd, Register Rn, unsigned imm) { \ 1118 wrap_adds_subs_imm_insn(Rd, Rn, imm, &Assembler::INSN, &Assembler::INSN); \ 1119 } \ 1120 \ 1121 void INSN(Register Rd, Register Rn, Register Rm, \ 1122 enum shift_kind kind, unsigned shift = 0) { \ 1123 Assembler::INSN(Rd, Rn, Rm, kind, shift); \ 1124 } \ 1125 \ 1126 void INSN(Register Rd, Register Rn, Register Rm) { \ 1127 Assembler::INSN(Rd, Rn, Rm); \ 1128 } \ 1129 \ 1130 void INSN(Register Rd, Register Rn, Register Rm, \ 1131 ext::operation option, int amount = 0) { \ 1132 Assembler::INSN(Rd, Rn, Rm, option, amount); \ 1133 } 1134 1135 WRAP(adds) WRAP(addsw) WRAP(subs) WRAP(subsw) 1136 1137 void add(Register Rd, Register Rn, RegisterOrConstant increment); 1138 void addw(Register Rd, Register Rn, RegisterOrConstant increment); 1139 void sub(Register Rd, Register Rn, RegisterOrConstant decrement); 1140 void subw(Register Rd, Register Rn, RegisterOrConstant decrement); 1141 1142 void adrp(Register reg1, const Address &dest, unsigned long &byte_offset); 1143 1144 void tableswitch(Register index, jint lowbound, jint highbound, 1145 Label &jumptable, Label &jumptable_end, int stride = 1) { 1146 adr(rscratch1, jumptable); 1147 subsw(rscratch2, index, lowbound); 1148 subsw(zr, rscratch2, highbound - lowbound); 1149 br(Assembler::HS, jumptable_end); 1150 add(rscratch1, rscratch1, rscratch2, 1151 ext::sxtw, exact_log2(stride * Assembler::instruction_size)); 1152 br(rscratch1); 1153 } 1154 1155 // Form an address from base + offset in Rd. Rd may or may not 1156 // actually be used: you must use the Address that is returned. It 1157 // is up to you to ensure that the shift provided matches the size 1158 // of your data. 1159 Address form_address(Register Rd, Register base, long byte_offset, int shift); 1160 1161 // Return true iff an address is within the 48-bit AArch64 address 1162 // space. 1163 bool is_valid_AArch64_address(address a) { 1164 return ((uint64_t)a >> 48) == 0; 1165 } 1166 1167 // Load the base of the cardtable byte map into reg. 1168 void load_byte_map_base(Register reg); 1169 1170 // Prolog generator routines to support switch between x86 code and 1171 // generated ARM code 1172 1173 // routine to generate an x86 prolog for a stub function which 1174 // bootstraps into the generated ARM code which directly follows the 1175 // stub 1176 // 1177 1178 public: 1179 // enum used for aarch64--x86 linkage to define return type of x86 function 1180 enum ret_type { ret_type_void, ret_type_integral, ret_type_float, ret_type_double}; 1181 1182 #ifdef BUILTIN_SIM 1183 void c_stub_prolog(int gp_arg_count, int fp_arg_count, int ret_type, address *prolog_ptr = NULL); 1184 #else 1185 void c_stub_prolog(int gp_arg_count, int fp_arg_count, int ret_type) { } 1186 #endif 1187 1188 // special version of call_VM_leaf_base needed for aarch64 simulator 1189 // where we need to specify both the gp and fp arg counts and the 1190 // return type so that the linkage routine from aarch64 to x86 and 1191 // back knows which aarch64 registers to copy to x86 registers and 1192 // which x86 result register to copy back to an aarch64 register 1193 1194 void call_VM_leaf_base1( 1195 address entry_point, // the entry point 1196 int number_of_gp_arguments, // the number of gp reg arguments to pass 1197 int number_of_fp_arguments, // the number of fp reg arguments to pass 1198 ret_type type, // the return type for the call 1199 Label* retaddr = NULL 1200 ); 1201 1202 void ldr_constant(Register dest, const Address &const_addr) { 1203 if (NearCpool) { 1204 ldr(dest, const_addr); 1205 } else { 1206 unsigned long offset; 1207 adrp(dest, InternalAddress(const_addr.target()), offset); 1208 ldr(dest, Address(dest, offset)); 1209 } 1210 } 1211 1212 address read_polling_page(Register r, address page, relocInfo::relocType rtype); 1213 address read_polling_page(Register r, relocInfo::relocType rtype); 1214 void get_polling_page(Register dest, address page, relocInfo::relocType rtype); 1215 1216 // CRC32 code for java.util.zip.CRC32::updateBytes() instrinsic. 1217 void update_byte_crc32(Register crc, Register val, Register table); 1218 void update_word_crc32(Register crc, Register v, Register tmp, 1219 Register table0, Register table1, Register table2, Register table3, 1220 bool upper = false); 1221 1222 void string_compare(Register str1, Register str2, 1223 Register cnt1, Register cnt2, Register result, 1224 Register tmp1, Register tmp2, FloatRegister vtmp1, 1225 FloatRegister vtmp2, FloatRegister vtmp3, int ae); 1226 1227 void has_negatives(Register ary1, Register len, Register result); 1228 1229 void arrays_equals(Register a1, Register a2, Register result, Register cnt1, 1230 Register tmp1, Register tmp2, Register tmp3, int elem_size); 1231 1232 void string_equals(Register a1, Register a2, Register result, Register cnt1, 1233 int elem_size); 1234 1235 void fill_words(Register base, Register cnt, Register value); 1236 void zero_words(Register base, u_int64_t cnt); 1237 void zero_words(Register ptr, Register cnt); 1238 void zero_dcache_blocks(Register base, Register cnt); 1239 1240 static const int zero_words_block_size; 1241 1242 void byte_array_inflate(Register src, Register dst, Register len, 1243 FloatRegister vtmp1, FloatRegister vtmp2, 1244 FloatRegister vtmp3, Register tmp4); 1245 1246 void char_array_compress(Register src, Register dst, Register len, 1247 FloatRegister tmp1Reg, FloatRegister tmp2Reg, 1248 FloatRegister tmp3Reg, FloatRegister tmp4Reg, 1249 Register result); 1250 1251 void encode_iso_array(Register src, Register dst, 1252 Register len, Register result, 1253 FloatRegister Vtmp1, FloatRegister Vtmp2, 1254 FloatRegister Vtmp3, FloatRegister Vtmp4); 1255 void string_indexof(Register str1, Register str2, 1256 Register cnt1, Register cnt2, 1257 Register tmp1, Register tmp2, 1258 Register tmp3, Register tmp4, 1259 Register tmp5, Register tmp6, 1260 int int_cnt1, Register result, int ae); 1261 void string_indexof_char(Register str1, Register cnt1, 1262 Register ch, Register result, 1263 Register tmp1, Register tmp2, Register tmp3); 1264 void fast_log(FloatRegister vtmp0, FloatRegister vtmp1, FloatRegister vtmp2, 1265 FloatRegister vtmp3, FloatRegister vtmp4, FloatRegister vtmp5, 1266 FloatRegister tmpC1, FloatRegister tmpC2, FloatRegister tmpC3, 1267 FloatRegister tmpC4, Register tmp1, Register tmp2, 1268 Register tmp3, Register tmp4, Register tmp5); 1269 void generate_dsin_dcos(bool isCos, address npio2_hw, address two_over_pi, 1270 address pio2, address dsin_coef, address dcos_coef); 1271 private: 1272 // begin trigonometric functions support block 1273 void generate__ieee754_rem_pio2(address npio2_hw, address two_over_pi, address pio2); 1274 void generate__kernel_rem_pio2(address two_over_pi, address pio2); 1275 void generate_kernel_sin(FloatRegister x, bool iyIsOne, address dsin_coef); 1276 void generate_kernel_cos(FloatRegister x, address dcos_coef); 1277 // end trigonometric functions support block 1278 void add2_with_carry(Register final_dest_hi, Register dest_hi, Register dest_lo, 1279 Register src1, Register src2); 1280 void add2_with_carry(Register dest_hi, Register dest_lo, Register src1, Register src2) { 1281 add2_with_carry(dest_hi, dest_hi, dest_lo, src1, src2); 1282 } 1283 void multiply_64_x_64_loop(Register x, Register xstart, Register x_xstart, 1284 Register y, Register y_idx, Register z, 1285 Register carry, Register product, 1286 Register idx, Register kdx); 1287 void multiply_128_x_128_loop(Register y, Register z, 1288 Register carry, Register carry2, 1289 Register idx, Register jdx, 1290 Register yz_idx1, Register yz_idx2, 1291 Register tmp, Register tmp3, Register tmp4, 1292 Register tmp7, Register product_hi); 1293 void kernel_crc32_using_crc32(Register crc, Register buf, 1294 Register len, Register tmp0, Register tmp1, Register tmp2, 1295 Register tmp3); 1296 void kernel_crc32c_using_crc32c(Register crc, Register buf, 1297 Register len, Register tmp0, Register tmp1, Register tmp2, 1298 Register tmp3); 1299 public: 1300 void multiply_to_len(Register x, Register xlen, Register y, Register ylen, Register z, 1301 Register zlen, Register tmp1, Register tmp2, Register tmp3, 1302 Register tmp4, Register tmp5, Register tmp6, Register tmp7); 1303 void mul_add(Register out, Register in, Register offs, Register len, Register k); 1304 // ISB may be needed because of a safepoint 1305 void maybe_isb() { isb(); } 1306 1307 private: 1308 // Return the effective address r + (r1 << ext) + offset. 1309 // Uses rscratch2. 1310 Address offsetted_address(Register r, Register r1, Address::extend ext, 1311 int offset, int size); 1312 1313 private: 1314 // Returns an address on the stack which is reachable with a ldr/str of size 1315 // Uses rscratch2 if the address is not directly reachable 1316 Address spill_address(int size, int offset, Register tmp=rscratch2); 1317 1318 bool merge_alignment_check(Register base, size_t size, long cur_offset, long prev_offset) const; 1319 1320 // Check whether two loads/stores can be merged into ldp/stp. 1321 bool ldst_can_merge(Register rx, const Address &adr, size_t cur_size_in_bytes, bool is_store) const; 1322 1323 // Merge current load/store with previous load/store into ldp/stp. 1324 void merge_ldst(Register rx, const Address &adr, size_t cur_size_in_bytes, bool is_store); 1325 1326 // Try to merge two loads/stores into ldp/stp. If success, returns true else false. 1327 bool try_merge_ldst(Register rt, const Address &adr, size_t cur_size_in_bytes, bool is_store); 1328 1329 public: 1330 void spill(Register Rx, bool is64, int offset) { 1331 if (is64) { 1332 str(Rx, spill_address(8, offset)); 1333 } else { 1334 strw(Rx, spill_address(4, offset)); 1335 } 1336 } 1337 void spill(FloatRegister Vx, SIMD_RegVariant T, int offset) { 1338 str(Vx, T, spill_address(1 << (int)T, offset)); 1339 } 1340 void unspill(Register Rx, bool is64, int offset) { 1341 if (is64) { 1342 ldr(Rx, spill_address(8, offset)); 1343 } else { 1344 ldrw(Rx, spill_address(4, offset)); 1345 } 1346 } 1347 void unspill(FloatRegister Vx, SIMD_RegVariant T, int offset) { 1348 ldr(Vx, T, spill_address(1 << (int)T, offset)); 1349 } 1350 void spill_copy128(int src_offset, int dst_offset, 1351 Register tmp1=rscratch1, Register tmp2=rscratch2) { 1352 if (src_offset < 512 && (src_offset & 7) == 0 && 1353 dst_offset < 512 && (dst_offset & 7) == 0) { 1354 ldp(tmp1, tmp2, Address(sp, src_offset)); 1355 stp(tmp1, tmp2, Address(sp, dst_offset)); 1356 } else { 1357 unspill(tmp1, true, src_offset); 1358 spill(tmp1, true, dst_offset); 1359 unspill(tmp1, true, src_offset+8); 1360 spill(tmp1, true, dst_offset+8); 1361 } 1362 } 1363 }; 1364 1365 #ifdef ASSERT 1366 inline bool AbstractAssembler::pd_check_instruction_mark() { return false; } 1367 #endif 1368 1369 /** 1370 * class SkipIfEqual: 1371 * 1372 * Instantiating this class will result in assembly code being output that will 1373 * jump around any code emitted between the creation of the instance and it's 1374 * automatic destruction at the end of a scope block, depending on the value of 1375 * the flag passed to the constructor, which will be checked at run-time. 1376 */ 1377 class SkipIfEqual { 1378 private: 1379 MacroAssembler* _masm; 1380 Label _label; 1381 1382 public: 1383 SkipIfEqual(MacroAssembler*, const bool* flag_addr, bool value); 1384 ~SkipIfEqual(); 1385 }; 1386 1387 struct tableswitch { 1388 Register _reg; 1389 int _insn_index; jint _first_key; jint _last_key; 1390 Label _after; 1391 Label _branches; 1392 }; 1393 1394 #endif // CPU_AARCH64_VM_MACROASSEMBLER_AARCH64_HPP