Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright (c) 1994-2006 Sun Microsystems Inc. |
| 2 | // All Rights Reserved. |
| 3 | // |
| 4 | // Redistribution and use in source and binary forms, with or without |
| 5 | // modification, are permitted provided that the following conditions |
| 6 | // are met: |
| 7 | // |
| 8 | // - Redistributions of source code must retain the above copyright notice, |
| 9 | // this list of conditions and the following disclaimer. |
| 10 | // |
| 11 | // - Redistribution in binary form must reproduce the above copyright |
| 12 | // notice, this list of conditions and the following disclaimer in the |
| 13 | // documentation and/or other materials provided with the |
| 14 | // distribution. |
| 15 | // |
| 16 | // - Neither the name of Sun Microsystems or the names of contributors may |
| 17 | // be used to endorse or promote products derived from this software without |
| 18 | // specific prior written permission. |
| 19 | // |
| 20 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 23 | // FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 24 | // COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 25 | // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 26 | // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 27 | // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | // HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 29 | // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 30 | // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 31 | // OF THE POSSIBILITY OF SUCH DAMAGE. |
| 32 | |
| 33 | // The original source code covered by the above license above has been modified |
| 34 | // significantly by Google Inc. |
| 35 | // Copyright 2012 the V8 project authors. All rights reserved. |
| 36 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 37 | #include "src/x87/assembler-x87.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 38 | |
| 39 | #if V8_TARGET_ARCH_X87 |
| 40 | |
| 41 | #include "src/base/bits.h" |
| 42 | #include "src/base/cpu.h" |
| 43 | #include "src/disassembler.h" |
| 44 | #include "src/macro-assembler.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 45 | #include "src/v8.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 46 | |
| 47 | namespace v8 { |
| 48 | namespace internal { |
| 49 | |
| 50 | // ----------------------------------------------------------------------------- |
| 51 | // Implementation of CpuFeatures |
| 52 | |
| 53 | void CpuFeatures::ProbeImpl(bool cross_compile) { |
| 54 | base::CPU cpu; |
| 55 | |
| 56 | // Only use statically determined features for cross compile (snapshot). |
| 57 | if (cross_compile) return; |
| 58 | } |
| 59 | |
| 60 | |
| 61 | void CpuFeatures::PrintTarget() { } |
| 62 | void CpuFeatures::PrintFeatures() { } |
| 63 | |
| 64 | |
| 65 | // ----------------------------------------------------------------------------- |
| 66 | // Implementation of Displacement |
| 67 | |
| 68 | void Displacement::init(Label* L, Type type) { |
| 69 | DCHECK(!L->is_bound()); |
| 70 | int next = 0; |
| 71 | if (L->is_linked()) { |
| 72 | next = L->pos(); |
| 73 | DCHECK(next > 0); // Displacements must be at positions > 0 |
| 74 | } |
| 75 | // Ensure that we _never_ overflow the next field. |
| 76 | DCHECK(NextField::is_valid(Assembler::kMaximalBufferSize)); |
| 77 | data_ = NextField::encode(next) | TypeField::encode(type); |
| 78 | } |
| 79 | |
| 80 | |
| 81 | // ----------------------------------------------------------------------------- |
| 82 | // Implementation of RelocInfo |
| 83 | |
| 84 | |
| 85 | const int RelocInfo::kApplyMask = |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 86 | RelocInfo::kCodeTargetMask | 1 << RelocInfo::RUNTIME_ENTRY | |
| 87 | 1 << RelocInfo::INTERNAL_REFERENCE | 1 << RelocInfo::CODE_AGE_SEQUENCE | |
| 88 | RelocInfo::kDebugBreakSlotMask; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 89 | |
| 90 | |
| 91 | bool RelocInfo::IsCodedSpecially() { |
| 92 | // The deserializer needs to know whether a pointer is specially coded. Being |
| 93 | // specially coded on IA32 means that it is a relative address, as used by |
| 94 | // branch instructions. These are also the ones that need changing when a |
| 95 | // code object moves. |
| 96 | return (1 << rmode_) & kApplyMask; |
| 97 | } |
| 98 | |
| 99 | |
| 100 | bool RelocInfo::IsInConstantPool() { |
| 101 | return false; |
| 102 | } |
| 103 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 104 | Address RelocInfo::wasm_memory_reference() { |
| 105 | DCHECK(IsWasmMemoryReference(rmode_)); |
| 106 | return Memory::Address_at(pc_); |
| 107 | } |
| 108 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 109 | Address RelocInfo::wasm_global_reference() { |
| 110 | DCHECK(IsWasmGlobalReference(rmode_)); |
| 111 | return Memory::Address_at(pc_); |
| 112 | } |
| 113 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 114 | uint32_t RelocInfo::wasm_memory_size_reference() { |
| 115 | DCHECK(IsWasmMemorySizeReference(rmode_)); |
| 116 | return Memory::uint32_at(pc_); |
| 117 | } |
| 118 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 119 | void RelocInfo::unchecked_update_wasm_memory_reference( |
| 120 | Address address, ICacheFlushMode flush_mode) { |
| 121 | Memory::Address_at(pc_) = address; |
| 122 | } |
| 123 | |
| 124 | void RelocInfo::unchecked_update_wasm_memory_size(uint32_t size, |
| 125 | ICacheFlushMode flush_mode) { |
| 126 | Memory::uint32_at(pc_) = size; |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 127 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 128 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 129 | // ----------------------------------------------------------------------------- |
| 130 | // Implementation of Operand |
| 131 | |
| 132 | Operand::Operand(Register base, int32_t disp, RelocInfo::Mode rmode) { |
| 133 | // [base + disp/r] |
| 134 | if (disp == 0 && RelocInfo::IsNone(rmode) && !base.is(ebp)) { |
| 135 | // [base] |
| 136 | set_modrm(0, base); |
| 137 | if (base.is(esp)) set_sib(times_1, esp, base); |
| 138 | } else if (is_int8(disp) && RelocInfo::IsNone(rmode)) { |
| 139 | // [base + disp8] |
| 140 | set_modrm(1, base); |
| 141 | if (base.is(esp)) set_sib(times_1, esp, base); |
| 142 | set_disp8(disp); |
| 143 | } else { |
| 144 | // [base + disp/r] |
| 145 | set_modrm(2, base); |
| 146 | if (base.is(esp)) set_sib(times_1, esp, base); |
| 147 | set_dispr(disp, rmode); |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | |
| 152 | Operand::Operand(Register base, |
| 153 | Register index, |
| 154 | ScaleFactor scale, |
| 155 | int32_t disp, |
| 156 | RelocInfo::Mode rmode) { |
| 157 | DCHECK(!index.is(esp)); // illegal addressing mode |
| 158 | // [base + index*scale + disp/r] |
| 159 | if (disp == 0 && RelocInfo::IsNone(rmode) && !base.is(ebp)) { |
| 160 | // [base + index*scale] |
| 161 | set_modrm(0, esp); |
| 162 | set_sib(scale, index, base); |
| 163 | } else if (is_int8(disp) && RelocInfo::IsNone(rmode)) { |
| 164 | // [base + index*scale + disp8] |
| 165 | set_modrm(1, esp); |
| 166 | set_sib(scale, index, base); |
| 167 | set_disp8(disp); |
| 168 | } else { |
| 169 | // [base + index*scale + disp/r] |
| 170 | set_modrm(2, esp); |
| 171 | set_sib(scale, index, base); |
| 172 | set_dispr(disp, rmode); |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | |
| 177 | Operand::Operand(Register index, |
| 178 | ScaleFactor scale, |
| 179 | int32_t disp, |
| 180 | RelocInfo::Mode rmode) { |
| 181 | DCHECK(!index.is(esp)); // illegal addressing mode |
| 182 | // [index*scale + disp/r] |
| 183 | set_modrm(0, esp); |
| 184 | set_sib(scale, index, ebp); |
| 185 | set_dispr(disp, rmode); |
| 186 | } |
| 187 | |
| 188 | |
| 189 | bool Operand::is_reg(Register reg) const { |
| 190 | return ((buf_[0] & 0xF8) == 0xC0) // addressing mode is register only. |
| 191 | && ((buf_[0] & 0x07) == reg.code()); // register codes match. |
| 192 | } |
| 193 | |
| 194 | |
| 195 | bool Operand::is_reg_only() const { |
| 196 | return (buf_[0] & 0xF8) == 0xC0; // Addressing mode is register only. |
| 197 | } |
| 198 | |
| 199 | |
| 200 | Register Operand::reg() const { |
| 201 | DCHECK(is_reg_only()); |
| 202 | return Register::from_code(buf_[0] & 0x07); |
| 203 | } |
| 204 | |
| 205 | |
| 206 | // ----------------------------------------------------------------------------- |
| 207 | // Implementation of Assembler. |
| 208 | |
| 209 | // Emit a single byte. Must always be inlined. |
| 210 | #define EMIT(x) \ |
| 211 | *pc_++ = (x) |
| 212 | |
| 213 | |
| 214 | #ifdef GENERATED_CODE_COVERAGE |
| 215 | static void InitCoverageLog(); |
| 216 | #endif |
| 217 | |
| 218 | Assembler::Assembler(Isolate* isolate, void* buffer, int buffer_size) |
| 219 | : AssemblerBase(isolate, buffer, buffer_size), |
| 220 | positions_recorder_(this) { |
| 221 | // Clear the buffer in debug mode unless it was provided by the |
| 222 | // caller in which case we can't be sure it's okay to overwrite |
| 223 | // existing code in it; see CodePatcher::CodePatcher(...). |
| 224 | #ifdef DEBUG |
| 225 | if (own_buffer_) { |
| 226 | memset(buffer_, 0xCC, buffer_size_); // int3 |
| 227 | } |
| 228 | #endif |
| 229 | |
| 230 | reloc_info_writer.Reposition(buffer_ + buffer_size_, pc_); |
| 231 | |
| 232 | #ifdef GENERATED_CODE_COVERAGE |
| 233 | InitCoverageLog(); |
| 234 | #endif |
| 235 | } |
| 236 | |
| 237 | |
| 238 | void Assembler::GetCode(CodeDesc* desc) { |
| 239 | // Finalize code (at this point overflow() may be true, but the gap ensures |
| 240 | // that we are still not overlapping instructions and relocation info). |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 241 | reloc_info_writer.Finish(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 242 | DCHECK(pc_ <= reloc_info_writer.pos()); // No overlap. |
| 243 | // Set up code descriptor. |
| 244 | desc->buffer = buffer_; |
| 245 | desc->buffer_size = buffer_size_; |
| 246 | desc->instr_size = pc_offset(); |
| 247 | desc->reloc_size = (buffer_ + buffer_size_) - reloc_info_writer.pos(); |
| 248 | desc->origin = this; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 249 | desc->constant_pool_size = 0; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 250 | desc->unwinding_info_size = 0; |
| 251 | desc->unwinding_info = nullptr; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | |
| 255 | void Assembler::Align(int m) { |
| 256 | DCHECK(base::bits::IsPowerOfTwo32(m)); |
| 257 | int mask = m - 1; |
| 258 | int addr = pc_offset(); |
| 259 | Nop((m - (addr & mask)) & mask); |
| 260 | } |
| 261 | |
| 262 | |
| 263 | bool Assembler::IsNop(Address addr) { |
| 264 | Address a = addr; |
| 265 | while (*a == 0x66) a++; |
| 266 | if (*a == 0x90) return true; |
| 267 | if (a[0] == 0xf && a[1] == 0x1f) return true; |
| 268 | return false; |
| 269 | } |
| 270 | |
| 271 | |
| 272 | void Assembler::Nop(int bytes) { |
| 273 | EnsureSpace ensure_space(this); |
| 274 | |
| 275 | // Older CPUs that do not support SSE2 may not support multibyte NOP |
| 276 | // instructions. |
| 277 | for (; bytes > 0; bytes--) { |
| 278 | EMIT(0x90); |
| 279 | } |
| 280 | return; |
| 281 | } |
| 282 | |
| 283 | |
| 284 | void Assembler::CodeTargetAlign() { |
| 285 | Align(16); // Preferred alignment of jump targets on ia32. |
| 286 | } |
| 287 | |
| 288 | |
| 289 | void Assembler::cpuid() { |
| 290 | EnsureSpace ensure_space(this); |
| 291 | EMIT(0x0F); |
| 292 | EMIT(0xA2); |
| 293 | } |
| 294 | |
| 295 | |
| 296 | void Assembler::pushad() { |
| 297 | EnsureSpace ensure_space(this); |
| 298 | EMIT(0x60); |
| 299 | } |
| 300 | |
| 301 | |
| 302 | void Assembler::popad() { |
| 303 | EnsureSpace ensure_space(this); |
| 304 | EMIT(0x61); |
| 305 | } |
| 306 | |
| 307 | |
| 308 | void Assembler::pushfd() { |
| 309 | EnsureSpace ensure_space(this); |
| 310 | EMIT(0x9C); |
| 311 | } |
| 312 | |
| 313 | |
| 314 | void Assembler::popfd() { |
| 315 | EnsureSpace ensure_space(this); |
| 316 | EMIT(0x9D); |
| 317 | } |
| 318 | |
| 319 | |
| 320 | void Assembler::push(const Immediate& x) { |
| 321 | EnsureSpace ensure_space(this); |
| 322 | if (x.is_int8()) { |
| 323 | EMIT(0x6a); |
| 324 | EMIT(x.x_); |
| 325 | } else { |
| 326 | EMIT(0x68); |
| 327 | emit(x); |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | |
| 332 | void Assembler::push_imm32(int32_t imm32) { |
| 333 | EnsureSpace ensure_space(this); |
| 334 | EMIT(0x68); |
| 335 | emit(imm32); |
| 336 | } |
| 337 | |
| 338 | |
| 339 | void Assembler::push(Register src) { |
| 340 | EnsureSpace ensure_space(this); |
| 341 | EMIT(0x50 | src.code()); |
| 342 | } |
| 343 | |
| 344 | |
| 345 | void Assembler::push(const Operand& src) { |
| 346 | EnsureSpace ensure_space(this); |
| 347 | EMIT(0xFF); |
| 348 | emit_operand(esi, src); |
| 349 | } |
| 350 | |
| 351 | |
| 352 | void Assembler::pop(Register dst) { |
| 353 | DCHECK(reloc_info_writer.last_pc() != NULL); |
| 354 | EnsureSpace ensure_space(this); |
| 355 | EMIT(0x58 | dst.code()); |
| 356 | } |
| 357 | |
| 358 | |
| 359 | void Assembler::pop(const Operand& dst) { |
| 360 | EnsureSpace ensure_space(this); |
| 361 | EMIT(0x8F); |
| 362 | emit_operand(eax, dst); |
| 363 | } |
| 364 | |
| 365 | |
| 366 | void Assembler::enter(const Immediate& size) { |
| 367 | EnsureSpace ensure_space(this); |
| 368 | EMIT(0xC8); |
| 369 | emit_w(size); |
| 370 | EMIT(0); |
| 371 | } |
| 372 | |
| 373 | |
| 374 | void Assembler::leave() { |
| 375 | EnsureSpace ensure_space(this); |
| 376 | EMIT(0xC9); |
| 377 | } |
| 378 | |
| 379 | |
| 380 | void Assembler::mov_b(Register dst, const Operand& src) { |
| 381 | CHECK(dst.is_byte_register()); |
| 382 | EnsureSpace ensure_space(this); |
| 383 | EMIT(0x8A); |
| 384 | emit_operand(dst, src); |
| 385 | } |
| 386 | |
| 387 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 388 | void Assembler::mov_b(const Operand& dst, const Immediate& src) { |
| 389 | EnsureSpace ensure_space(this); |
| 390 | EMIT(0xC6); |
| 391 | emit_operand(eax, dst); |
| 392 | EMIT(static_cast<int8_t>(src.x_)); |
| 393 | } |
| 394 | |
| 395 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 396 | void Assembler::mov_b(const Operand& dst, int8_t imm8) { |
| 397 | EnsureSpace ensure_space(this); |
| 398 | EMIT(0xC6); |
| 399 | emit_operand(eax, dst); |
| 400 | EMIT(imm8); |
| 401 | } |
| 402 | |
| 403 | |
| 404 | void Assembler::mov_b(const Operand& dst, Register src) { |
| 405 | CHECK(src.is_byte_register()); |
| 406 | EnsureSpace ensure_space(this); |
| 407 | EMIT(0x88); |
| 408 | emit_operand(src, dst); |
| 409 | } |
| 410 | |
| 411 | |
| 412 | void Assembler::mov_w(Register dst, const Operand& src) { |
| 413 | EnsureSpace ensure_space(this); |
| 414 | EMIT(0x66); |
| 415 | EMIT(0x8B); |
| 416 | emit_operand(dst, src); |
| 417 | } |
| 418 | |
| 419 | |
| 420 | void Assembler::mov_w(const Operand& dst, Register src) { |
| 421 | EnsureSpace ensure_space(this); |
| 422 | EMIT(0x66); |
| 423 | EMIT(0x89); |
| 424 | emit_operand(src, dst); |
| 425 | } |
| 426 | |
| 427 | |
| 428 | void Assembler::mov_w(const Operand& dst, int16_t imm16) { |
| 429 | EnsureSpace ensure_space(this); |
| 430 | EMIT(0x66); |
| 431 | EMIT(0xC7); |
| 432 | emit_operand(eax, dst); |
| 433 | EMIT(static_cast<int8_t>(imm16 & 0xff)); |
| 434 | EMIT(static_cast<int8_t>(imm16 >> 8)); |
| 435 | } |
| 436 | |
| 437 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 438 | void Assembler::mov_w(const Operand& dst, const Immediate& src) { |
| 439 | EnsureSpace ensure_space(this); |
| 440 | EMIT(0x66); |
| 441 | EMIT(0xC7); |
| 442 | emit_operand(eax, dst); |
| 443 | EMIT(static_cast<int8_t>(src.x_ & 0xff)); |
| 444 | EMIT(static_cast<int8_t>(src.x_ >> 8)); |
| 445 | } |
| 446 | |
| 447 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 448 | void Assembler::mov(Register dst, int32_t imm32) { |
| 449 | EnsureSpace ensure_space(this); |
| 450 | EMIT(0xB8 | dst.code()); |
| 451 | emit(imm32); |
| 452 | } |
| 453 | |
| 454 | |
| 455 | void Assembler::mov(Register dst, const Immediate& x) { |
| 456 | EnsureSpace ensure_space(this); |
| 457 | EMIT(0xB8 | dst.code()); |
| 458 | emit(x); |
| 459 | } |
| 460 | |
| 461 | |
| 462 | void Assembler::mov(Register dst, Handle<Object> handle) { |
| 463 | EnsureSpace ensure_space(this); |
| 464 | EMIT(0xB8 | dst.code()); |
| 465 | emit(handle); |
| 466 | } |
| 467 | |
| 468 | |
| 469 | void Assembler::mov(Register dst, const Operand& src) { |
| 470 | EnsureSpace ensure_space(this); |
| 471 | EMIT(0x8B); |
| 472 | emit_operand(dst, src); |
| 473 | } |
| 474 | |
| 475 | |
| 476 | void Assembler::mov(Register dst, Register src) { |
| 477 | EnsureSpace ensure_space(this); |
| 478 | EMIT(0x89); |
| 479 | EMIT(0xC0 | src.code() << 3 | dst.code()); |
| 480 | } |
| 481 | |
| 482 | |
| 483 | void Assembler::mov(const Operand& dst, const Immediate& x) { |
| 484 | EnsureSpace ensure_space(this); |
| 485 | EMIT(0xC7); |
| 486 | emit_operand(eax, dst); |
| 487 | emit(x); |
| 488 | } |
| 489 | |
| 490 | |
| 491 | void Assembler::mov(const Operand& dst, Handle<Object> handle) { |
| 492 | EnsureSpace ensure_space(this); |
| 493 | EMIT(0xC7); |
| 494 | emit_operand(eax, dst); |
| 495 | emit(handle); |
| 496 | } |
| 497 | |
| 498 | |
| 499 | void Assembler::mov(const Operand& dst, Register src) { |
| 500 | EnsureSpace ensure_space(this); |
| 501 | EMIT(0x89); |
| 502 | emit_operand(src, dst); |
| 503 | } |
| 504 | |
| 505 | |
| 506 | void Assembler::movsx_b(Register dst, const Operand& src) { |
| 507 | EnsureSpace ensure_space(this); |
| 508 | EMIT(0x0F); |
| 509 | EMIT(0xBE); |
| 510 | emit_operand(dst, src); |
| 511 | } |
| 512 | |
| 513 | |
| 514 | void Assembler::movsx_w(Register dst, const Operand& src) { |
| 515 | EnsureSpace ensure_space(this); |
| 516 | EMIT(0x0F); |
| 517 | EMIT(0xBF); |
| 518 | emit_operand(dst, src); |
| 519 | } |
| 520 | |
| 521 | |
| 522 | void Assembler::movzx_b(Register dst, const Operand& src) { |
| 523 | EnsureSpace ensure_space(this); |
| 524 | EMIT(0x0F); |
| 525 | EMIT(0xB6); |
| 526 | emit_operand(dst, src); |
| 527 | } |
| 528 | |
| 529 | |
| 530 | void Assembler::movzx_w(Register dst, const Operand& src) { |
| 531 | EnsureSpace ensure_space(this); |
| 532 | EMIT(0x0F); |
| 533 | EMIT(0xB7); |
| 534 | emit_operand(dst, src); |
| 535 | } |
| 536 | |
| 537 | |
| 538 | void Assembler::cld() { |
| 539 | EnsureSpace ensure_space(this); |
| 540 | EMIT(0xFC); |
| 541 | } |
| 542 | |
| 543 | |
| 544 | void Assembler::rep_movs() { |
| 545 | EnsureSpace ensure_space(this); |
| 546 | EMIT(0xF3); |
| 547 | EMIT(0xA5); |
| 548 | } |
| 549 | |
| 550 | |
| 551 | void Assembler::rep_stos() { |
| 552 | EnsureSpace ensure_space(this); |
| 553 | EMIT(0xF3); |
| 554 | EMIT(0xAB); |
| 555 | } |
| 556 | |
| 557 | |
| 558 | void Assembler::stos() { |
| 559 | EnsureSpace ensure_space(this); |
| 560 | EMIT(0xAB); |
| 561 | } |
| 562 | |
| 563 | |
| 564 | void Assembler::xchg(Register dst, Register src) { |
| 565 | EnsureSpace ensure_space(this); |
| 566 | if (src.is(eax) || dst.is(eax)) { // Single-byte encoding. |
| 567 | EMIT(0x90 | (src.is(eax) ? dst.code() : src.code())); |
| 568 | } else { |
| 569 | EMIT(0x87); |
| 570 | EMIT(0xC0 | src.code() << 3 | dst.code()); |
| 571 | } |
| 572 | } |
| 573 | |
| 574 | |
| 575 | void Assembler::xchg(Register dst, const Operand& src) { |
| 576 | EnsureSpace ensure_space(this); |
| 577 | EMIT(0x87); |
| 578 | emit_operand(dst, src); |
| 579 | } |
| 580 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 581 | void Assembler::xchg_b(Register reg, const Operand& op) { |
| 582 | EnsureSpace ensure_space(this); |
| 583 | EMIT(0x86); |
| 584 | emit_operand(reg, op); |
| 585 | } |
| 586 | |
| 587 | void Assembler::xchg_w(Register reg, const Operand& op) { |
| 588 | EnsureSpace ensure_space(this); |
| 589 | EMIT(0x66); |
| 590 | EMIT(0x87); |
| 591 | emit_operand(reg, op); |
| 592 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 593 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 594 | void Assembler::lock() { |
| 595 | EnsureSpace ensure_space(this); |
| 596 | EMIT(0xF0); |
| 597 | } |
| 598 | |
| 599 | void Assembler::cmpxchg(const Operand& dst, Register src) { |
| 600 | EnsureSpace ensure_space(this); |
| 601 | EMIT(0x0F); |
| 602 | EMIT(0xB1); |
| 603 | emit_operand(src, dst); |
| 604 | } |
| 605 | |
| 606 | void Assembler::cmpxchg_b(const Operand& dst, Register src) { |
| 607 | EnsureSpace ensure_space(this); |
| 608 | EMIT(0x0F); |
| 609 | EMIT(0xB0); |
| 610 | emit_operand(src, dst); |
| 611 | } |
| 612 | |
| 613 | void Assembler::cmpxchg_w(const Operand& dst, Register src) { |
| 614 | EnsureSpace ensure_space(this); |
| 615 | EMIT(0x66); |
| 616 | EMIT(0x0F); |
| 617 | EMIT(0xB1); |
| 618 | emit_operand(src, dst); |
| 619 | } |
| 620 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 621 | void Assembler::adc(Register dst, int32_t imm32) { |
| 622 | EnsureSpace ensure_space(this); |
| 623 | emit_arith(2, Operand(dst), Immediate(imm32)); |
| 624 | } |
| 625 | |
| 626 | |
| 627 | void Assembler::adc(Register dst, const Operand& src) { |
| 628 | EnsureSpace ensure_space(this); |
| 629 | EMIT(0x13); |
| 630 | emit_operand(dst, src); |
| 631 | } |
| 632 | |
| 633 | |
| 634 | void Assembler::add(Register dst, const Operand& src) { |
| 635 | EnsureSpace ensure_space(this); |
| 636 | EMIT(0x03); |
| 637 | emit_operand(dst, src); |
| 638 | } |
| 639 | |
| 640 | |
| 641 | void Assembler::add(const Operand& dst, Register src) { |
| 642 | EnsureSpace ensure_space(this); |
| 643 | EMIT(0x01); |
| 644 | emit_operand(src, dst); |
| 645 | } |
| 646 | |
| 647 | |
| 648 | void Assembler::add(const Operand& dst, const Immediate& x) { |
| 649 | DCHECK(reloc_info_writer.last_pc() != NULL); |
| 650 | EnsureSpace ensure_space(this); |
| 651 | emit_arith(0, dst, x); |
| 652 | } |
| 653 | |
| 654 | |
| 655 | void Assembler::and_(Register dst, int32_t imm32) { |
| 656 | and_(dst, Immediate(imm32)); |
| 657 | } |
| 658 | |
| 659 | |
| 660 | void Assembler::and_(Register dst, const Immediate& x) { |
| 661 | EnsureSpace ensure_space(this); |
| 662 | emit_arith(4, Operand(dst), x); |
| 663 | } |
| 664 | |
| 665 | |
| 666 | void Assembler::and_(Register dst, const Operand& src) { |
| 667 | EnsureSpace ensure_space(this); |
| 668 | EMIT(0x23); |
| 669 | emit_operand(dst, src); |
| 670 | } |
| 671 | |
| 672 | |
| 673 | void Assembler::and_(const Operand& dst, const Immediate& x) { |
| 674 | EnsureSpace ensure_space(this); |
| 675 | emit_arith(4, dst, x); |
| 676 | } |
| 677 | |
| 678 | |
| 679 | void Assembler::and_(const Operand& dst, Register src) { |
| 680 | EnsureSpace ensure_space(this); |
| 681 | EMIT(0x21); |
| 682 | emit_operand(src, dst); |
| 683 | } |
| 684 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 685 | void Assembler::cmpb(const Operand& op, Immediate imm8) { |
| 686 | DCHECK(imm8.is_int8() || imm8.is_uint8()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 687 | EnsureSpace ensure_space(this); |
| 688 | if (op.is_reg(eax)) { |
| 689 | EMIT(0x3C); |
| 690 | } else { |
| 691 | EMIT(0x80); |
| 692 | emit_operand(edi, op); // edi == 7 |
| 693 | } |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 694 | emit_b(imm8); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 695 | } |
| 696 | |
| 697 | |
| 698 | void Assembler::cmpb(const Operand& op, Register reg) { |
| 699 | CHECK(reg.is_byte_register()); |
| 700 | EnsureSpace ensure_space(this); |
| 701 | EMIT(0x38); |
| 702 | emit_operand(reg, op); |
| 703 | } |
| 704 | |
| 705 | |
| 706 | void Assembler::cmpb(Register reg, const Operand& op) { |
| 707 | CHECK(reg.is_byte_register()); |
| 708 | EnsureSpace ensure_space(this); |
| 709 | EMIT(0x3A); |
| 710 | emit_operand(reg, op); |
| 711 | } |
| 712 | |
| 713 | |
| 714 | void Assembler::cmpw(const Operand& op, Immediate imm16) { |
| 715 | DCHECK(imm16.is_int16()); |
| 716 | EnsureSpace ensure_space(this); |
| 717 | EMIT(0x66); |
| 718 | EMIT(0x81); |
| 719 | emit_operand(edi, op); |
| 720 | emit_w(imm16); |
| 721 | } |
| 722 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 723 | void Assembler::cmpw(Register reg, const Operand& op) { |
| 724 | EnsureSpace ensure_space(this); |
| 725 | EMIT(0x66); |
| 726 | EMIT(0x39); |
| 727 | emit_operand(reg, op); |
| 728 | } |
| 729 | |
| 730 | void Assembler::cmpw(const Operand& op, Register reg) { |
| 731 | EnsureSpace ensure_space(this); |
| 732 | EMIT(0x66); |
| 733 | EMIT(0x3B); |
| 734 | emit_operand(reg, op); |
| 735 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 736 | |
| 737 | void Assembler::cmp(Register reg, int32_t imm32) { |
| 738 | EnsureSpace ensure_space(this); |
| 739 | emit_arith(7, Operand(reg), Immediate(imm32)); |
| 740 | } |
| 741 | |
| 742 | |
| 743 | void Assembler::cmp(Register reg, Handle<Object> handle) { |
| 744 | EnsureSpace ensure_space(this); |
| 745 | emit_arith(7, Operand(reg), Immediate(handle)); |
| 746 | } |
| 747 | |
| 748 | |
| 749 | void Assembler::cmp(Register reg, const Operand& op) { |
| 750 | EnsureSpace ensure_space(this); |
| 751 | EMIT(0x3B); |
| 752 | emit_operand(reg, op); |
| 753 | } |
| 754 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 755 | void Assembler::cmp(const Operand& op, Register reg) { |
| 756 | EnsureSpace ensure_space(this); |
| 757 | EMIT(0x39); |
| 758 | emit_operand(reg, op); |
| 759 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 760 | |
| 761 | void Assembler::cmp(const Operand& op, const Immediate& imm) { |
| 762 | EnsureSpace ensure_space(this); |
| 763 | emit_arith(7, op, imm); |
| 764 | } |
| 765 | |
| 766 | |
| 767 | void Assembler::cmp(const Operand& op, Handle<Object> handle) { |
| 768 | EnsureSpace ensure_space(this); |
| 769 | emit_arith(7, op, Immediate(handle)); |
| 770 | } |
| 771 | |
| 772 | |
| 773 | void Assembler::cmpb_al(const Operand& op) { |
| 774 | EnsureSpace ensure_space(this); |
| 775 | EMIT(0x38); // CMP r/m8, r8 |
| 776 | emit_operand(eax, op); // eax has same code as register al. |
| 777 | } |
| 778 | |
| 779 | |
| 780 | void Assembler::cmpw_ax(const Operand& op) { |
| 781 | EnsureSpace ensure_space(this); |
| 782 | EMIT(0x66); |
| 783 | EMIT(0x39); // CMP r/m16, r16 |
| 784 | emit_operand(eax, op); // eax has same code as register ax. |
| 785 | } |
| 786 | |
| 787 | |
| 788 | void Assembler::dec_b(Register dst) { |
| 789 | CHECK(dst.is_byte_register()); |
| 790 | EnsureSpace ensure_space(this); |
| 791 | EMIT(0xFE); |
| 792 | EMIT(0xC8 | dst.code()); |
| 793 | } |
| 794 | |
| 795 | |
| 796 | void Assembler::dec_b(const Operand& dst) { |
| 797 | EnsureSpace ensure_space(this); |
| 798 | EMIT(0xFE); |
| 799 | emit_operand(ecx, dst); |
| 800 | } |
| 801 | |
| 802 | |
| 803 | void Assembler::dec(Register dst) { |
| 804 | EnsureSpace ensure_space(this); |
| 805 | EMIT(0x48 | dst.code()); |
| 806 | } |
| 807 | |
| 808 | |
| 809 | void Assembler::dec(const Operand& dst) { |
| 810 | EnsureSpace ensure_space(this); |
| 811 | EMIT(0xFF); |
| 812 | emit_operand(ecx, dst); |
| 813 | } |
| 814 | |
| 815 | |
| 816 | void Assembler::cdq() { |
| 817 | EnsureSpace ensure_space(this); |
| 818 | EMIT(0x99); |
| 819 | } |
| 820 | |
| 821 | |
| 822 | void Assembler::idiv(const Operand& src) { |
| 823 | EnsureSpace ensure_space(this); |
| 824 | EMIT(0xF7); |
| 825 | emit_operand(edi, src); |
| 826 | } |
| 827 | |
| 828 | |
| 829 | void Assembler::div(const Operand& src) { |
| 830 | EnsureSpace ensure_space(this); |
| 831 | EMIT(0xF7); |
| 832 | emit_operand(esi, src); |
| 833 | } |
| 834 | |
| 835 | |
| 836 | void Assembler::imul(Register reg) { |
| 837 | EnsureSpace ensure_space(this); |
| 838 | EMIT(0xF7); |
| 839 | EMIT(0xE8 | reg.code()); |
| 840 | } |
| 841 | |
| 842 | |
| 843 | void Assembler::imul(Register dst, const Operand& src) { |
| 844 | EnsureSpace ensure_space(this); |
| 845 | EMIT(0x0F); |
| 846 | EMIT(0xAF); |
| 847 | emit_operand(dst, src); |
| 848 | } |
| 849 | |
| 850 | |
| 851 | void Assembler::imul(Register dst, Register src, int32_t imm32) { |
| 852 | imul(dst, Operand(src), imm32); |
| 853 | } |
| 854 | |
| 855 | |
| 856 | void Assembler::imul(Register dst, const Operand& src, int32_t imm32) { |
| 857 | EnsureSpace ensure_space(this); |
| 858 | if (is_int8(imm32)) { |
| 859 | EMIT(0x6B); |
| 860 | emit_operand(dst, src); |
| 861 | EMIT(imm32); |
| 862 | } else { |
| 863 | EMIT(0x69); |
| 864 | emit_operand(dst, src); |
| 865 | emit(imm32); |
| 866 | } |
| 867 | } |
| 868 | |
| 869 | |
| 870 | void Assembler::inc(Register dst) { |
| 871 | EnsureSpace ensure_space(this); |
| 872 | EMIT(0x40 | dst.code()); |
| 873 | } |
| 874 | |
| 875 | |
| 876 | void Assembler::inc(const Operand& dst) { |
| 877 | EnsureSpace ensure_space(this); |
| 878 | EMIT(0xFF); |
| 879 | emit_operand(eax, dst); |
| 880 | } |
| 881 | |
| 882 | |
| 883 | void Assembler::lea(Register dst, const Operand& src) { |
| 884 | EnsureSpace ensure_space(this); |
| 885 | EMIT(0x8D); |
| 886 | emit_operand(dst, src); |
| 887 | } |
| 888 | |
| 889 | |
| 890 | void Assembler::mul(Register src) { |
| 891 | EnsureSpace ensure_space(this); |
| 892 | EMIT(0xF7); |
| 893 | EMIT(0xE0 | src.code()); |
| 894 | } |
| 895 | |
| 896 | |
| 897 | void Assembler::neg(Register dst) { |
| 898 | EnsureSpace ensure_space(this); |
| 899 | EMIT(0xF7); |
| 900 | EMIT(0xD8 | dst.code()); |
| 901 | } |
| 902 | |
| 903 | |
| 904 | void Assembler::neg(const Operand& dst) { |
| 905 | EnsureSpace ensure_space(this); |
| 906 | EMIT(0xF7); |
| 907 | emit_operand(ebx, dst); |
| 908 | } |
| 909 | |
| 910 | |
| 911 | void Assembler::not_(Register dst) { |
| 912 | EnsureSpace ensure_space(this); |
| 913 | EMIT(0xF7); |
| 914 | EMIT(0xD0 | dst.code()); |
| 915 | } |
| 916 | |
| 917 | |
| 918 | void Assembler::not_(const Operand& dst) { |
| 919 | EnsureSpace ensure_space(this); |
| 920 | EMIT(0xF7); |
| 921 | emit_operand(edx, dst); |
| 922 | } |
| 923 | |
| 924 | |
| 925 | void Assembler::or_(Register dst, int32_t imm32) { |
| 926 | EnsureSpace ensure_space(this); |
| 927 | emit_arith(1, Operand(dst), Immediate(imm32)); |
| 928 | } |
| 929 | |
| 930 | |
| 931 | void Assembler::or_(Register dst, const Operand& src) { |
| 932 | EnsureSpace ensure_space(this); |
| 933 | EMIT(0x0B); |
| 934 | emit_operand(dst, src); |
| 935 | } |
| 936 | |
| 937 | |
| 938 | void Assembler::or_(const Operand& dst, const Immediate& x) { |
| 939 | EnsureSpace ensure_space(this); |
| 940 | emit_arith(1, dst, x); |
| 941 | } |
| 942 | |
| 943 | |
| 944 | void Assembler::or_(const Operand& dst, Register src) { |
| 945 | EnsureSpace ensure_space(this); |
| 946 | EMIT(0x09); |
| 947 | emit_operand(src, dst); |
| 948 | } |
| 949 | |
| 950 | |
| 951 | void Assembler::rcl(Register dst, uint8_t imm8) { |
| 952 | EnsureSpace ensure_space(this); |
| 953 | DCHECK(is_uint5(imm8)); // illegal shift count |
| 954 | if (imm8 == 1) { |
| 955 | EMIT(0xD1); |
| 956 | EMIT(0xD0 | dst.code()); |
| 957 | } else { |
| 958 | EMIT(0xC1); |
| 959 | EMIT(0xD0 | dst.code()); |
| 960 | EMIT(imm8); |
| 961 | } |
| 962 | } |
| 963 | |
| 964 | |
| 965 | void Assembler::rcr(Register dst, uint8_t imm8) { |
| 966 | EnsureSpace ensure_space(this); |
| 967 | DCHECK(is_uint5(imm8)); // illegal shift count |
| 968 | if (imm8 == 1) { |
| 969 | EMIT(0xD1); |
| 970 | EMIT(0xD8 | dst.code()); |
| 971 | } else { |
| 972 | EMIT(0xC1); |
| 973 | EMIT(0xD8 | dst.code()); |
| 974 | EMIT(imm8); |
| 975 | } |
| 976 | } |
| 977 | |
| 978 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 979 | void Assembler::ror(const Operand& dst, uint8_t imm8) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 980 | EnsureSpace ensure_space(this); |
| 981 | DCHECK(is_uint5(imm8)); // illegal shift count |
| 982 | if (imm8 == 1) { |
| 983 | EMIT(0xD1); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 984 | emit_operand(ecx, dst); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 985 | } else { |
| 986 | EMIT(0xC1); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 987 | emit_operand(ecx, dst); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 988 | EMIT(imm8); |
| 989 | } |
| 990 | } |
| 991 | |
| 992 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 993 | void Assembler::ror_cl(const Operand& dst) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 994 | EnsureSpace ensure_space(this); |
| 995 | EMIT(0xD3); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 996 | emit_operand(ecx, dst); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 997 | } |
| 998 | |
| 999 | |
| 1000 | void Assembler::sar(const Operand& dst, uint8_t imm8) { |
| 1001 | EnsureSpace ensure_space(this); |
| 1002 | DCHECK(is_uint5(imm8)); // illegal shift count |
| 1003 | if (imm8 == 1) { |
| 1004 | EMIT(0xD1); |
| 1005 | emit_operand(edi, dst); |
| 1006 | } else { |
| 1007 | EMIT(0xC1); |
| 1008 | emit_operand(edi, dst); |
| 1009 | EMIT(imm8); |
| 1010 | } |
| 1011 | } |
| 1012 | |
| 1013 | |
| 1014 | void Assembler::sar_cl(const Operand& dst) { |
| 1015 | EnsureSpace ensure_space(this); |
| 1016 | EMIT(0xD3); |
| 1017 | emit_operand(edi, dst); |
| 1018 | } |
| 1019 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1020 | void Assembler::sbb(Register dst, const Operand& src) { |
| 1021 | EnsureSpace ensure_space(this); |
| 1022 | EMIT(0x1B); |
| 1023 | emit_operand(dst, src); |
| 1024 | } |
| 1025 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1026 | void Assembler::shld(Register dst, Register src, uint8_t shift) { |
| 1027 | DCHECK(is_uint5(shift)); |
| 1028 | EnsureSpace ensure_space(this); |
| 1029 | EMIT(0x0F); |
| 1030 | EMIT(0xA4); |
| 1031 | emit_operand(src, Operand(dst)); |
| 1032 | EMIT(shift); |
| 1033 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1034 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1035 | void Assembler::shld_cl(Register dst, Register src) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1036 | EnsureSpace ensure_space(this); |
| 1037 | EMIT(0x0F); |
| 1038 | EMIT(0xA5); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1039 | emit_operand(src, Operand(dst)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1040 | } |
| 1041 | |
| 1042 | |
| 1043 | void Assembler::shl(const Operand& dst, uint8_t imm8) { |
| 1044 | EnsureSpace ensure_space(this); |
| 1045 | DCHECK(is_uint5(imm8)); // illegal shift count |
| 1046 | if (imm8 == 1) { |
| 1047 | EMIT(0xD1); |
| 1048 | emit_operand(esp, dst); |
| 1049 | } else { |
| 1050 | EMIT(0xC1); |
| 1051 | emit_operand(esp, dst); |
| 1052 | EMIT(imm8); |
| 1053 | } |
| 1054 | } |
| 1055 | |
| 1056 | |
| 1057 | void Assembler::shl_cl(const Operand& dst) { |
| 1058 | EnsureSpace ensure_space(this); |
| 1059 | EMIT(0xD3); |
| 1060 | emit_operand(esp, dst); |
| 1061 | } |
| 1062 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1063 | void Assembler::shr(const Operand& dst, uint8_t imm8) { |
| 1064 | EnsureSpace ensure_space(this); |
| 1065 | DCHECK(is_uint5(imm8)); // illegal shift count |
| 1066 | if (imm8 == 1) { |
| 1067 | EMIT(0xD1); |
| 1068 | emit_operand(ebp, dst); |
| 1069 | } else { |
| 1070 | EMIT(0xC1); |
| 1071 | emit_operand(ebp, dst); |
| 1072 | EMIT(imm8); |
| 1073 | } |
| 1074 | } |
| 1075 | |
| 1076 | |
| 1077 | void Assembler::shr_cl(const Operand& dst) { |
| 1078 | EnsureSpace ensure_space(this); |
| 1079 | EMIT(0xD3); |
| 1080 | emit_operand(ebp, dst); |
| 1081 | } |
| 1082 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1083 | void Assembler::shrd(Register dst, Register src, uint8_t shift) { |
| 1084 | DCHECK(is_uint5(shift)); |
| 1085 | EnsureSpace ensure_space(this); |
| 1086 | EMIT(0x0F); |
| 1087 | EMIT(0xAC); |
| 1088 | emit_operand(dst, Operand(src)); |
| 1089 | EMIT(shift); |
| 1090 | } |
| 1091 | |
| 1092 | void Assembler::shrd_cl(const Operand& dst, Register src) { |
| 1093 | EnsureSpace ensure_space(this); |
| 1094 | EMIT(0x0F); |
| 1095 | EMIT(0xAD); |
| 1096 | emit_operand(src, dst); |
| 1097 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1098 | |
| 1099 | void Assembler::sub(const Operand& dst, const Immediate& x) { |
| 1100 | EnsureSpace ensure_space(this); |
| 1101 | emit_arith(5, dst, x); |
| 1102 | } |
| 1103 | |
| 1104 | |
| 1105 | void Assembler::sub(Register dst, const Operand& src) { |
| 1106 | EnsureSpace ensure_space(this); |
| 1107 | EMIT(0x2B); |
| 1108 | emit_operand(dst, src); |
| 1109 | } |
| 1110 | |
| 1111 | |
| 1112 | void Assembler::sub(const Operand& dst, Register src) { |
| 1113 | EnsureSpace ensure_space(this); |
| 1114 | EMIT(0x29); |
| 1115 | emit_operand(src, dst); |
| 1116 | } |
| 1117 | |
| 1118 | |
| 1119 | void Assembler::test(Register reg, const Immediate& imm) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1120 | if (imm.is_uint8()) { |
| 1121 | test_b(reg, imm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1122 | return; |
| 1123 | } |
| 1124 | |
| 1125 | EnsureSpace ensure_space(this); |
| 1126 | // This is not using emit_arith because test doesn't support |
| 1127 | // sign-extension of 8-bit operands. |
| 1128 | if (reg.is(eax)) { |
| 1129 | EMIT(0xA9); |
| 1130 | } else { |
| 1131 | EMIT(0xF7); |
| 1132 | EMIT(0xC0 | reg.code()); |
| 1133 | } |
| 1134 | emit(imm); |
| 1135 | } |
| 1136 | |
| 1137 | |
| 1138 | void Assembler::test(Register reg, const Operand& op) { |
| 1139 | EnsureSpace ensure_space(this); |
| 1140 | EMIT(0x85); |
| 1141 | emit_operand(reg, op); |
| 1142 | } |
| 1143 | |
| 1144 | |
| 1145 | void Assembler::test_b(Register reg, const Operand& op) { |
| 1146 | CHECK(reg.is_byte_register()); |
| 1147 | EnsureSpace ensure_space(this); |
| 1148 | EMIT(0x84); |
| 1149 | emit_operand(reg, op); |
| 1150 | } |
| 1151 | |
| 1152 | |
| 1153 | void Assembler::test(const Operand& op, const Immediate& imm) { |
| 1154 | if (op.is_reg_only()) { |
| 1155 | test(op.reg(), imm); |
| 1156 | return; |
| 1157 | } |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1158 | if (imm.is_uint8()) { |
| 1159 | return test_b(op, imm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1160 | } |
| 1161 | EnsureSpace ensure_space(this); |
| 1162 | EMIT(0xF7); |
| 1163 | emit_operand(eax, op); |
| 1164 | emit(imm); |
| 1165 | } |
| 1166 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1167 | void Assembler::test_b(Register reg, Immediate imm8) { |
| 1168 | DCHECK(imm8.is_uint8()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1169 | EnsureSpace ensure_space(this); |
| 1170 | // Only use test against byte for registers that have a byte |
| 1171 | // variant: eax, ebx, ecx, and edx. |
| 1172 | if (reg.is(eax)) { |
| 1173 | EMIT(0xA8); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1174 | emit_b(imm8); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1175 | } else if (reg.is_byte_register()) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1176 | emit_arith_b(0xF6, 0xC0, reg, static_cast<uint8_t>(imm8.x_)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1177 | } else { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1178 | EMIT(0x66); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1179 | EMIT(0xF7); |
| 1180 | EMIT(0xC0 | reg.code()); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1181 | emit_w(imm8); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1182 | } |
| 1183 | } |
| 1184 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1185 | void Assembler::test_b(const Operand& op, Immediate imm8) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1186 | if (op.is_reg_only()) { |
| 1187 | test_b(op.reg(), imm8); |
| 1188 | return; |
| 1189 | } |
| 1190 | EnsureSpace ensure_space(this); |
| 1191 | EMIT(0xF6); |
| 1192 | emit_operand(eax, op); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1193 | emit_b(imm8); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1194 | } |
| 1195 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1196 | void Assembler::test_w(Register reg, Immediate imm16) { |
| 1197 | DCHECK(imm16.is_int16() || imm16.is_uint16()); |
| 1198 | EnsureSpace ensure_space(this); |
| 1199 | if (reg.is(eax)) { |
| 1200 | EMIT(0xA9); |
| 1201 | emit_w(imm16); |
| 1202 | } else { |
| 1203 | EMIT(0x66); |
| 1204 | EMIT(0xF7); |
| 1205 | EMIT(0xc0 | reg.code()); |
| 1206 | emit_w(imm16); |
| 1207 | } |
| 1208 | } |
| 1209 | |
| 1210 | void Assembler::test_w(Register reg, const Operand& op) { |
| 1211 | EnsureSpace ensure_space(this); |
| 1212 | EMIT(0x66); |
| 1213 | EMIT(0x85); |
| 1214 | emit_operand(reg, op); |
| 1215 | } |
| 1216 | |
| 1217 | void Assembler::test_w(const Operand& op, Immediate imm16) { |
| 1218 | DCHECK(imm16.is_int16() || imm16.is_uint16()); |
| 1219 | if (op.is_reg_only()) { |
| 1220 | test_w(op.reg(), imm16); |
| 1221 | return; |
| 1222 | } |
| 1223 | EnsureSpace ensure_space(this); |
| 1224 | EMIT(0x66); |
| 1225 | EMIT(0xF7); |
| 1226 | emit_operand(eax, op); |
| 1227 | emit_w(imm16); |
| 1228 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1229 | |
| 1230 | void Assembler::xor_(Register dst, int32_t imm32) { |
| 1231 | EnsureSpace ensure_space(this); |
| 1232 | emit_arith(6, Operand(dst), Immediate(imm32)); |
| 1233 | } |
| 1234 | |
| 1235 | |
| 1236 | void Assembler::xor_(Register dst, const Operand& src) { |
| 1237 | EnsureSpace ensure_space(this); |
| 1238 | EMIT(0x33); |
| 1239 | emit_operand(dst, src); |
| 1240 | } |
| 1241 | |
| 1242 | |
| 1243 | void Assembler::xor_(const Operand& dst, Register src) { |
| 1244 | EnsureSpace ensure_space(this); |
| 1245 | EMIT(0x31); |
| 1246 | emit_operand(src, dst); |
| 1247 | } |
| 1248 | |
| 1249 | |
| 1250 | void Assembler::xor_(const Operand& dst, const Immediate& x) { |
| 1251 | EnsureSpace ensure_space(this); |
| 1252 | emit_arith(6, dst, x); |
| 1253 | } |
| 1254 | |
| 1255 | |
| 1256 | void Assembler::bt(const Operand& dst, Register src) { |
| 1257 | EnsureSpace ensure_space(this); |
| 1258 | EMIT(0x0F); |
| 1259 | EMIT(0xA3); |
| 1260 | emit_operand(src, dst); |
| 1261 | } |
| 1262 | |
| 1263 | |
| 1264 | void Assembler::bts(const Operand& dst, Register src) { |
| 1265 | EnsureSpace ensure_space(this); |
| 1266 | EMIT(0x0F); |
| 1267 | EMIT(0xAB); |
| 1268 | emit_operand(src, dst); |
| 1269 | } |
| 1270 | |
| 1271 | |
| 1272 | void Assembler::bsr(Register dst, const Operand& src) { |
| 1273 | EnsureSpace ensure_space(this); |
| 1274 | EMIT(0x0F); |
| 1275 | EMIT(0xBD); |
| 1276 | emit_operand(dst, src); |
| 1277 | } |
| 1278 | |
| 1279 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1280 | void Assembler::bsf(Register dst, const Operand& src) { |
| 1281 | EnsureSpace ensure_space(this); |
| 1282 | EMIT(0x0F); |
| 1283 | EMIT(0xBC); |
| 1284 | emit_operand(dst, src); |
| 1285 | } |
| 1286 | |
| 1287 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1288 | void Assembler::hlt() { |
| 1289 | EnsureSpace ensure_space(this); |
| 1290 | EMIT(0xF4); |
| 1291 | } |
| 1292 | |
| 1293 | |
| 1294 | void Assembler::int3() { |
| 1295 | EnsureSpace ensure_space(this); |
| 1296 | EMIT(0xCC); |
| 1297 | } |
| 1298 | |
| 1299 | |
| 1300 | void Assembler::nop() { |
| 1301 | EnsureSpace ensure_space(this); |
| 1302 | EMIT(0x90); |
| 1303 | } |
| 1304 | |
| 1305 | |
| 1306 | void Assembler::ret(int imm16) { |
| 1307 | EnsureSpace ensure_space(this); |
| 1308 | DCHECK(is_uint16(imm16)); |
| 1309 | if (imm16 == 0) { |
| 1310 | EMIT(0xC3); |
| 1311 | } else { |
| 1312 | EMIT(0xC2); |
| 1313 | EMIT(imm16 & 0xFF); |
| 1314 | EMIT((imm16 >> 8) & 0xFF); |
| 1315 | } |
| 1316 | } |
| 1317 | |
| 1318 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1319 | void Assembler::ud2() { |
| 1320 | EnsureSpace ensure_space(this); |
| 1321 | EMIT(0x0F); |
| 1322 | EMIT(0x0B); |
| 1323 | } |
| 1324 | |
| 1325 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1326 | // Labels refer to positions in the (to be) generated code. |
| 1327 | // There are bound, linked, and unused labels. |
| 1328 | // |
| 1329 | // Bound labels refer to known positions in the already |
| 1330 | // generated code. pos() is the position the label refers to. |
| 1331 | // |
| 1332 | // Linked labels refer to unknown positions in the code |
| 1333 | // to be generated; pos() is the position of the 32bit |
| 1334 | // Displacement of the last instruction using the label. |
| 1335 | |
| 1336 | |
| 1337 | void Assembler::print(Label* L) { |
| 1338 | if (L->is_unused()) { |
| 1339 | PrintF("unused label\n"); |
| 1340 | } else if (L->is_bound()) { |
| 1341 | PrintF("bound label to %d\n", L->pos()); |
| 1342 | } else if (L->is_linked()) { |
| 1343 | Label l = *L; |
| 1344 | PrintF("unbound label"); |
| 1345 | while (l.is_linked()) { |
| 1346 | Displacement disp = disp_at(&l); |
| 1347 | PrintF("@ %d ", l.pos()); |
| 1348 | disp.print(); |
| 1349 | PrintF("\n"); |
| 1350 | disp.next(&l); |
| 1351 | } |
| 1352 | } else { |
| 1353 | PrintF("label in inconsistent state (pos = %d)\n", L->pos_); |
| 1354 | } |
| 1355 | } |
| 1356 | |
| 1357 | |
| 1358 | void Assembler::bind_to(Label* L, int pos) { |
| 1359 | EnsureSpace ensure_space(this); |
| 1360 | DCHECK(0 <= pos && pos <= pc_offset()); // must have a valid binding position |
| 1361 | while (L->is_linked()) { |
| 1362 | Displacement disp = disp_at(L); |
| 1363 | int fixup_pos = L->pos(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1364 | if (disp.type() == Displacement::CODE_ABSOLUTE) { |
| 1365 | long_at_put(fixup_pos, reinterpret_cast<int>(buffer_ + pos)); |
| 1366 | internal_reference_positions_.push_back(fixup_pos); |
| 1367 | } else if (disp.type() == Displacement::CODE_RELATIVE) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1368 | // Relative to Code* heap object pointer. |
| 1369 | long_at_put(fixup_pos, pos + Code::kHeaderSize - kHeapObjectTag); |
| 1370 | } else { |
| 1371 | if (disp.type() == Displacement::UNCONDITIONAL_JUMP) { |
| 1372 | DCHECK(byte_at(fixup_pos - 1) == 0xE9); // jmp expected |
| 1373 | } |
| 1374 | // Relative address, relative to point after address. |
| 1375 | int imm32 = pos - (fixup_pos + sizeof(int32_t)); |
| 1376 | long_at_put(fixup_pos, imm32); |
| 1377 | } |
| 1378 | disp.next(L); |
| 1379 | } |
| 1380 | while (L->is_near_linked()) { |
| 1381 | int fixup_pos = L->near_link_pos(); |
| 1382 | int offset_to_next = |
| 1383 | static_cast<int>(*reinterpret_cast<int8_t*>(addr_at(fixup_pos))); |
| 1384 | DCHECK(offset_to_next <= 0); |
| 1385 | // Relative address, relative to point after address. |
| 1386 | int disp = pos - fixup_pos - sizeof(int8_t); |
| 1387 | CHECK(0 <= disp && disp <= 127); |
| 1388 | set_byte_at(fixup_pos, disp); |
| 1389 | if (offset_to_next < 0) { |
| 1390 | L->link_to(fixup_pos + offset_to_next, Label::kNear); |
| 1391 | } else { |
| 1392 | L->UnuseNear(); |
| 1393 | } |
| 1394 | } |
| 1395 | L->bind_to(pos); |
| 1396 | } |
| 1397 | |
| 1398 | |
| 1399 | void Assembler::bind(Label* L) { |
| 1400 | EnsureSpace ensure_space(this); |
| 1401 | DCHECK(!L->is_bound()); // label can only be bound once |
| 1402 | bind_to(L, pc_offset()); |
| 1403 | } |
| 1404 | |
| 1405 | |
| 1406 | void Assembler::call(Label* L) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1407 | EnsureSpace ensure_space(this); |
| 1408 | if (L->is_bound()) { |
| 1409 | const int long_size = 5; |
| 1410 | int offs = L->pos() - pc_offset(); |
| 1411 | DCHECK(offs <= 0); |
| 1412 | // 1110 1000 #32-bit disp. |
| 1413 | EMIT(0xE8); |
| 1414 | emit(offs - long_size); |
| 1415 | } else { |
| 1416 | // 1110 1000 #32-bit disp. |
| 1417 | EMIT(0xE8); |
| 1418 | emit_disp(L, Displacement::OTHER); |
| 1419 | } |
| 1420 | } |
| 1421 | |
| 1422 | |
| 1423 | void Assembler::call(byte* entry, RelocInfo::Mode rmode) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1424 | EnsureSpace ensure_space(this); |
| 1425 | DCHECK(!RelocInfo::IsCodeTarget(rmode)); |
| 1426 | EMIT(0xE8); |
| 1427 | if (RelocInfo::IsRuntimeEntry(rmode)) { |
| 1428 | emit(reinterpret_cast<uint32_t>(entry), rmode); |
| 1429 | } else { |
| 1430 | emit(entry - (pc_ + sizeof(int32_t)), rmode); |
| 1431 | } |
| 1432 | } |
| 1433 | |
| 1434 | |
| 1435 | int Assembler::CallSize(const Operand& adr) { |
| 1436 | // Call size is 1 (opcode) + adr.len_ (operand). |
| 1437 | return 1 + adr.len_; |
| 1438 | } |
| 1439 | |
| 1440 | |
| 1441 | void Assembler::call(const Operand& adr) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1442 | EnsureSpace ensure_space(this); |
| 1443 | EMIT(0xFF); |
| 1444 | emit_operand(edx, adr); |
| 1445 | } |
| 1446 | |
| 1447 | |
| 1448 | int Assembler::CallSize(Handle<Code> code, RelocInfo::Mode rmode) { |
| 1449 | return 1 /* EMIT */ + sizeof(uint32_t) /* emit */; |
| 1450 | } |
| 1451 | |
| 1452 | |
| 1453 | void Assembler::call(Handle<Code> code, |
| 1454 | RelocInfo::Mode rmode, |
| 1455 | TypeFeedbackId ast_id) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1456 | EnsureSpace ensure_space(this); |
| 1457 | DCHECK(RelocInfo::IsCodeTarget(rmode) |
| 1458 | || rmode == RelocInfo::CODE_AGE_SEQUENCE); |
| 1459 | EMIT(0xE8); |
| 1460 | emit(code, rmode, ast_id); |
| 1461 | } |
| 1462 | |
| 1463 | |
| 1464 | void Assembler::jmp(Label* L, Label::Distance distance) { |
| 1465 | EnsureSpace ensure_space(this); |
| 1466 | if (L->is_bound()) { |
| 1467 | const int short_size = 2; |
| 1468 | const int long_size = 5; |
| 1469 | int offs = L->pos() - pc_offset(); |
| 1470 | DCHECK(offs <= 0); |
| 1471 | if (is_int8(offs - short_size)) { |
| 1472 | // 1110 1011 #8-bit disp. |
| 1473 | EMIT(0xEB); |
| 1474 | EMIT((offs - short_size) & 0xFF); |
| 1475 | } else { |
| 1476 | // 1110 1001 #32-bit disp. |
| 1477 | EMIT(0xE9); |
| 1478 | emit(offs - long_size); |
| 1479 | } |
| 1480 | } else if (distance == Label::kNear) { |
| 1481 | EMIT(0xEB); |
| 1482 | emit_near_disp(L); |
| 1483 | } else { |
| 1484 | // 1110 1001 #32-bit disp. |
| 1485 | EMIT(0xE9); |
| 1486 | emit_disp(L, Displacement::UNCONDITIONAL_JUMP); |
| 1487 | } |
| 1488 | } |
| 1489 | |
| 1490 | |
| 1491 | void Assembler::jmp(byte* entry, RelocInfo::Mode rmode) { |
| 1492 | EnsureSpace ensure_space(this); |
| 1493 | DCHECK(!RelocInfo::IsCodeTarget(rmode)); |
| 1494 | EMIT(0xE9); |
| 1495 | if (RelocInfo::IsRuntimeEntry(rmode)) { |
| 1496 | emit(reinterpret_cast<uint32_t>(entry), rmode); |
| 1497 | } else { |
| 1498 | emit(entry - (pc_ + sizeof(int32_t)), rmode); |
| 1499 | } |
| 1500 | } |
| 1501 | |
| 1502 | |
| 1503 | void Assembler::jmp(const Operand& adr) { |
| 1504 | EnsureSpace ensure_space(this); |
| 1505 | EMIT(0xFF); |
| 1506 | emit_operand(esp, adr); |
| 1507 | } |
| 1508 | |
| 1509 | |
| 1510 | void Assembler::jmp(Handle<Code> code, RelocInfo::Mode rmode) { |
| 1511 | EnsureSpace ensure_space(this); |
| 1512 | DCHECK(RelocInfo::IsCodeTarget(rmode)); |
| 1513 | EMIT(0xE9); |
| 1514 | emit(code, rmode); |
| 1515 | } |
| 1516 | |
| 1517 | |
| 1518 | void Assembler::j(Condition cc, Label* L, Label::Distance distance) { |
| 1519 | EnsureSpace ensure_space(this); |
| 1520 | DCHECK(0 <= cc && static_cast<int>(cc) < 16); |
| 1521 | if (L->is_bound()) { |
| 1522 | const int short_size = 2; |
| 1523 | const int long_size = 6; |
| 1524 | int offs = L->pos() - pc_offset(); |
| 1525 | DCHECK(offs <= 0); |
| 1526 | if (is_int8(offs - short_size)) { |
| 1527 | // 0111 tttn #8-bit disp |
| 1528 | EMIT(0x70 | cc); |
| 1529 | EMIT((offs - short_size) & 0xFF); |
| 1530 | } else { |
| 1531 | // 0000 1111 1000 tttn #32-bit disp |
| 1532 | EMIT(0x0F); |
| 1533 | EMIT(0x80 | cc); |
| 1534 | emit(offs - long_size); |
| 1535 | } |
| 1536 | } else if (distance == Label::kNear) { |
| 1537 | EMIT(0x70 | cc); |
| 1538 | emit_near_disp(L); |
| 1539 | } else { |
| 1540 | // 0000 1111 1000 tttn #32-bit disp |
| 1541 | // Note: could eliminate cond. jumps to this jump if condition |
| 1542 | // is the same however, seems to be rather unlikely case. |
| 1543 | EMIT(0x0F); |
| 1544 | EMIT(0x80 | cc); |
| 1545 | emit_disp(L, Displacement::OTHER); |
| 1546 | } |
| 1547 | } |
| 1548 | |
| 1549 | |
| 1550 | void Assembler::j(Condition cc, byte* entry, RelocInfo::Mode rmode) { |
| 1551 | EnsureSpace ensure_space(this); |
| 1552 | DCHECK((0 <= cc) && (static_cast<int>(cc) < 16)); |
| 1553 | // 0000 1111 1000 tttn #32-bit disp. |
| 1554 | EMIT(0x0F); |
| 1555 | EMIT(0x80 | cc); |
| 1556 | if (RelocInfo::IsRuntimeEntry(rmode)) { |
| 1557 | emit(reinterpret_cast<uint32_t>(entry), rmode); |
| 1558 | } else { |
| 1559 | emit(entry - (pc_ + sizeof(int32_t)), rmode); |
| 1560 | } |
| 1561 | } |
| 1562 | |
| 1563 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1564 | void Assembler::j(Condition cc, Handle<Code> code, RelocInfo::Mode rmode) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1565 | EnsureSpace ensure_space(this); |
| 1566 | // 0000 1111 1000 tttn #32-bit disp |
| 1567 | EMIT(0x0F); |
| 1568 | EMIT(0x80 | cc); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1569 | emit(code, rmode); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1570 | } |
| 1571 | |
| 1572 | |
| 1573 | // FPU instructions. |
| 1574 | |
| 1575 | void Assembler::fld(int i) { |
| 1576 | EnsureSpace ensure_space(this); |
| 1577 | emit_farith(0xD9, 0xC0, i); |
| 1578 | } |
| 1579 | |
| 1580 | |
| 1581 | void Assembler::fstp(int i) { |
| 1582 | EnsureSpace ensure_space(this); |
| 1583 | emit_farith(0xDD, 0xD8, i); |
| 1584 | } |
| 1585 | |
| 1586 | |
| 1587 | void Assembler::fld1() { |
| 1588 | EnsureSpace ensure_space(this); |
| 1589 | EMIT(0xD9); |
| 1590 | EMIT(0xE8); |
| 1591 | } |
| 1592 | |
| 1593 | |
| 1594 | void Assembler::fldpi() { |
| 1595 | EnsureSpace ensure_space(this); |
| 1596 | EMIT(0xD9); |
| 1597 | EMIT(0xEB); |
| 1598 | } |
| 1599 | |
| 1600 | |
| 1601 | void Assembler::fldz() { |
| 1602 | EnsureSpace ensure_space(this); |
| 1603 | EMIT(0xD9); |
| 1604 | EMIT(0xEE); |
| 1605 | } |
| 1606 | |
| 1607 | |
| 1608 | void Assembler::fldln2() { |
| 1609 | EnsureSpace ensure_space(this); |
| 1610 | EMIT(0xD9); |
| 1611 | EMIT(0xED); |
| 1612 | } |
| 1613 | |
| 1614 | |
| 1615 | void Assembler::fld_s(const Operand& adr) { |
| 1616 | EnsureSpace ensure_space(this); |
| 1617 | EMIT(0xD9); |
| 1618 | emit_operand(eax, adr); |
| 1619 | } |
| 1620 | |
| 1621 | |
| 1622 | void Assembler::fld_d(const Operand& adr) { |
| 1623 | EnsureSpace ensure_space(this); |
| 1624 | EMIT(0xDD); |
| 1625 | emit_operand(eax, adr); |
| 1626 | } |
| 1627 | |
| 1628 | |
| 1629 | void Assembler::fstp_s(const Operand& adr) { |
| 1630 | EnsureSpace ensure_space(this); |
| 1631 | EMIT(0xD9); |
| 1632 | emit_operand(ebx, adr); |
| 1633 | } |
| 1634 | |
| 1635 | |
| 1636 | void Assembler::fst_s(const Operand& adr) { |
| 1637 | EnsureSpace ensure_space(this); |
| 1638 | EMIT(0xD9); |
| 1639 | emit_operand(edx, adr); |
| 1640 | } |
| 1641 | |
| 1642 | |
| 1643 | void Assembler::fldcw(const Operand& adr) { |
| 1644 | EnsureSpace ensure_space(this); |
| 1645 | EMIT(0xD9); |
| 1646 | emit_operand(ebp, adr); |
| 1647 | } |
| 1648 | |
| 1649 | |
| 1650 | void Assembler::fnstcw(const Operand& adr) { |
| 1651 | EnsureSpace ensure_space(this); |
| 1652 | EMIT(0xD9); |
| 1653 | emit_operand(edi, adr); |
| 1654 | } |
| 1655 | |
| 1656 | |
| 1657 | void Assembler::fstp_d(const Operand& adr) { |
| 1658 | EnsureSpace ensure_space(this); |
| 1659 | EMIT(0xDD); |
| 1660 | emit_operand(ebx, adr); |
| 1661 | } |
| 1662 | |
| 1663 | |
| 1664 | void Assembler::fst_d(const Operand& adr) { |
| 1665 | EnsureSpace ensure_space(this); |
| 1666 | EMIT(0xDD); |
| 1667 | emit_operand(edx, adr); |
| 1668 | } |
| 1669 | |
| 1670 | |
| 1671 | void Assembler::fild_s(const Operand& adr) { |
| 1672 | EnsureSpace ensure_space(this); |
| 1673 | EMIT(0xDB); |
| 1674 | emit_operand(eax, adr); |
| 1675 | } |
| 1676 | |
| 1677 | |
| 1678 | void Assembler::fild_d(const Operand& adr) { |
| 1679 | EnsureSpace ensure_space(this); |
| 1680 | EMIT(0xDF); |
| 1681 | emit_operand(ebp, adr); |
| 1682 | } |
| 1683 | |
| 1684 | |
| 1685 | void Assembler::fistp_s(const Operand& adr) { |
| 1686 | EnsureSpace ensure_space(this); |
| 1687 | EMIT(0xDB); |
| 1688 | emit_operand(ebx, adr); |
| 1689 | } |
| 1690 | |
| 1691 | |
| 1692 | void Assembler::fisttp_s(const Operand& adr) { |
| 1693 | DCHECK(IsEnabled(SSE3)); |
| 1694 | EnsureSpace ensure_space(this); |
| 1695 | EMIT(0xDB); |
| 1696 | emit_operand(ecx, adr); |
| 1697 | } |
| 1698 | |
| 1699 | |
| 1700 | void Assembler::fisttp_d(const Operand& adr) { |
| 1701 | DCHECK(IsEnabled(SSE3)); |
| 1702 | EnsureSpace ensure_space(this); |
| 1703 | EMIT(0xDD); |
| 1704 | emit_operand(ecx, adr); |
| 1705 | } |
| 1706 | |
| 1707 | |
| 1708 | void Assembler::fist_s(const Operand& adr) { |
| 1709 | EnsureSpace ensure_space(this); |
| 1710 | EMIT(0xDB); |
| 1711 | emit_operand(edx, adr); |
| 1712 | } |
| 1713 | |
| 1714 | |
| 1715 | void Assembler::fistp_d(const Operand& adr) { |
| 1716 | EnsureSpace ensure_space(this); |
| 1717 | EMIT(0xDF); |
| 1718 | emit_operand(edi, adr); |
| 1719 | } |
| 1720 | |
| 1721 | |
| 1722 | void Assembler::fabs() { |
| 1723 | EnsureSpace ensure_space(this); |
| 1724 | EMIT(0xD9); |
| 1725 | EMIT(0xE1); |
| 1726 | } |
| 1727 | |
| 1728 | |
| 1729 | void Assembler::fchs() { |
| 1730 | EnsureSpace ensure_space(this); |
| 1731 | EMIT(0xD9); |
| 1732 | EMIT(0xE0); |
| 1733 | } |
| 1734 | |
| 1735 | |
| 1736 | void Assembler::fsqrt() { |
| 1737 | EnsureSpace ensure_space(this); |
| 1738 | EMIT(0xD9); |
| 1739 | EMIT(0xFA); |
| 1740 | } |
| 1741 | |
| 1742 | |
| 1743 | void Assembler::fcos() { |
| 1744 | EnsureSpace ensure_space(this); |
| 1745 | EMIT(0xD9); |
| 1746 | EMIT(0xFF); |
| 1747 | } |
| 1748 | |
| 1749 | |
| 1750 | void Assembler::fsin() { |
| 1751 | EnsureSpace ensure_space(this); |
| 1752 | EMIT(0xD9); |
| 1753 | EMIT(0xFE); |
| 1754 | } |
| 1755 | |
| 1756 | |
| 1757 | void Assembler::fptan() { |
| 1758 | EnsureSpace ensure_space(this); |
| 1759 | EMIT(0xD9); |
| 1760 | EMIT(0xF2); |
| 1761 | } |
| 1762 | |
| 1763 | |
| 1764 | void Assembler::fyl2x() { |
| 1765 | EnsureSpace ensure_space(this); |
| 1766 | EMIT(0xD9); |
| 1767 | EMIT(0xF1); |
| 1768 | } |
| 1769 | |
| 1770 | |
| 1771 | void Assembler::f2xm1() { |
| 1772 | EnsureSpace ensure_space(this); |
| 1773 | EMIT(0xD9); |
| 1774 | EMIT(0xF0); |
| 1775 | } |
| 1776 | |
| 1777 | |
| 1778 | void Assembler::fscale() { |
| 1779 | EnsureSpace ensure_space(this); |
| 1780 | EMIT(0xD9); |
| 1781 | EMIT(0xFD); |
| 1782 | } |
| 1783 | |
| 1784 | |
| 1785 | void Assembler::fninit() { |
| 1786 | EnsureSpace ensure_space(this); |
| 1787 | EMIT(0xDB); |
| 1788 | EMIT(0xE3); |
| 1789 | } |
| 1790 | |
| 1791 | |
| 1792 | void Assembler::fadd(int i) { |
| 1793 | EnsureSpace ensure_space(this); |
| 1794 | emit_farith(0xDC, 0xC0, i); |
| 1795 | } |
| 1796 | |
| 1797 | |
| 1798 | void Assembler::fadd_i(int i) { |
| 1799 | EnsureSpace ensure_space(this); |
| 1800 | emit_farith(0xD8, 0xC0, i); |
| 1801 | } |
| 1802 | |
| 1803 | |
| 1804 | void Assembler::fadd_d(const Operand& adr) { |
| 1805 | EnsureSpace ensure_space(this); |
| 1806 | EMIT(0xDC); |
| 1807 | emit_operand(eax, adr); |
| 1808 | } |
| 1809 | |
| 1810 | |
| 1811 | void Assembler::fsub(int i) { |
| 1812 | EnsureSpace ensure_space(this); |
| 1813 | emit_farith(0xDC, 0xE8, i); |
| 1814 | } |
| 1815 | |
| 1816 | |
| 1817 | void Assembler::fsub_i(int i) { |
| 1818 | EnsureSpace ensure_space(this); |
| 1819 | emit_farith(0xD8, 0xE0, i); |
| 1820 | } |
| 1821 | |
| 1822 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1823 | void Assembler::fsubr_d(const Operand& adr) { |
| 1824 | EnsureSpace ensure_space(this); |
| 1825 | EMIT(0xDC); |
| 1826 | emit_operand(ebp, adr); |
| 1827 | } |
| 1828 | |
| 1829 | |
| 1830 | void Assembler::fsub_d(const Operand& adr) { |
| 1831 | EnsureSpace ensure_space(this); |
| 1832 | EMIT(0xDC); |
| 1833 | emit_operand(esp, adr); |
| 1834 | } |
| 1835 | |
| 1836 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1837 | void Assembler::fisub_s(const Operand& adr) { |
| 1838 | EnsureSpace ensure_space(this); |
| 1839 | EMIT(0xDA); |
| 1840 | emit_operand(esp, adr); |
| 1841 | } |
| 1842 | |
| 1843 | |
| 1844 | void Assembler::fmul_i(int i) { |
| 1845 | EnsureSpace ensure_space(this); |
| 1846 | emit_farith(0xD8, 0xC8, i); |
| 1847 | } |
| 1848 | |
| 1849 | |
| 1850 | void Assembler::fmul(int i) { |
| 1851 | EnsureSpace ensure_space(this); |
| 1852 | emit_farith(0xDC, 0xC8, i); |
| 1853 | } |
| 1854 | |
| 1855 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1856 | void Assembler::fmul_d(const Operand& adr) { |
| 1857 | EnsureSpace ensure_space(this); |
| 1858 | EMIT(0xDC); |
| 1859 | emit_operand(ecx, adr); |
| 1860 | } |
| 1861 | |
| 1862 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1863 | void Assembler::fdiv(int i) { |
| 1864 | EnsureSpace ensure_space(this); |
| 1865 | emit_farith(0xDC, 0xF8, i); |
| 1866 | } |
| 1867 | |
| 1868 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1869 | void Assembler::fdiv_d(const Operand& adr) { |
| 1870 | EnsureSpace ensure_space(this); |
| 1871 | EMIT(0xDC); |
| 1872 | emit_operand(esi, adr); |
| 1873 | } |
| 1874 | |
| 1875 | |
| 1876 | void Assembler::fdivr_d(const Operand& adr) { |
| 1877 | EnsureSpace ensure_space(this); |
| 1878 | EMIT(0xDC); |
| 1879 | emit_operand(edi, adr); |
| 1880 | } |
| 1881 | |
| 1882 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1883 | void Assembler::fdiv_i(int i) { |
| 1884 | EnsureSpace ensure_space(this); |
| 1885 | emit_farith(0xD8, 0xF0, i); |
| 1886 | } |
| 1887 | |
| 1888 | |
| 1889 | void Assembler::faddp(int i) { |
| 1890 | EnsureSpace ensure_space(this); |
| 1891 | emit_farith(0xDE, 0xC0, i); |
| 1892 | } |
| 1893 | |
| 1894 | |
| 1895 | void Assembler::fsubp(int i) { |
| 1896 | EnsureSpace ensure_space(this); |
| 1897 | emit_farith(0xDE, 0xE8, i); |
| 1898 | } |
| 1899 | |
| 1900 | |
| 1901 | void Assembler::fsubrp(int i) { |
| 1902 | EnsureSpace ensure_space(this); |
| 1903 | emit_farith(0xDE, 0xE0, i); |
| 1904 | } |
| 1905 | |
| 1906 | |
| 1907 | void Assembler::fmulp(int i) { |
| 1908 | EnsureSpace ensure_space(this); |
| 1909 | emit_farith(0xDE, 0xC8, i); |
| 1910 | } |
| 1911 | |
| 1912 | |
| 1913 | void Assembler::fdivp(int i) { |
| 1914 | EnsureSpace ensure_space(this); |
| 1915 | emit_farith(0xDE, 0xF8, i); |
| 1916 | } |
| 1917 | |
| 1918 | |
| 1919 | void Assembler::fprem() { |
| 1920 | EnsureSpace ensure_space(this); |
| 1921 | EMIT(0xD9); |
| 1922 | EMIT(0xF8); |
| 1923 | } |
| 1924 | |
| 1925 | |
| 1926 | void Assembler::fprem1() { |
| 1927 | EnsureSpace ensure_space(this); |
| 1928 | EMIT(0xD9); |
| 1929 | EMIT(0xF5); |
| 1930 | } |
| 1931 | |
| 1932 | |
| 1933 | void Assembler::fxch(int i) { |
| 1934 | EnsureSpace ensure_space(this); |
| 1935 | emit_farith(0xD9, 0xC8, i); |
| 1936 | } |
| 1937 | |
| 1938 | |
| 1939 | void Assembler::fincstp() { |
| 1940 | EnsureSpace ensure_space(this); |
| 1941 | EMIT(0xD9); |
| 1942 | EMIT(0xF7); |
| 1943 | } |
| 1944 | |
| 1945 | |
| 1946 | void Assembler::ffree(int i) { |
| 1947 | EnsureSpace ensure_space(this); |
| 1948 | emit_farith(0xDD, 0xC0, i); |
| 1949 | } |
| 1950 | |
| 1951 | |
| 1952 | void Assembler::ftst() { |
| 1953 | EnsureSpace ensure_space(this); |
| 1954 | EMIT(0xD9); |
| 1955 | EMIT(0xE4); |
| 1956 | } |
| 1957 | |
| 1958 | |
| 1959 | void Assembler::fxam() { |
| 1960 | EnsureSpace ensure_space(this); |
| 1961 | EMIT(0xD9); |
| 1962 | EMIT(0xE5); |
| 1963 | } |
| 1964 | |
| 1965 | |
| 1966 | void Assembler::fucomp(int i) { |
| 1967 | EnsureSpace ensure_space(this); |
| 1968 | emit_farith(0xDD, 0xE8, i); |
| 1969 | } |
| 1970 | |
| 1971 | |
| 1972 | void Assembler::fucompp() { |
| 1973 | EnsureSpace ensure_space(this); |
| 1974 | EMIT(0xDA); |
| 1975 | EMIT(0xE9); |
| 1976 | } |
| 1977 | |
| 1978 | |
| 1979 | void Assembler::fucomi(int i) { |
| 1980 | EnsureSpace ensure_space(this); |
| 1981 | EMIT(0xDB); |
| 1982 | EMIT(0xE8 + i); |
| 1983 | } |
| 1984 | |
| 1985 | |
| 1986 | void Assembler::fucomip() { |
| 1987 | EnsureSpace ensure_space(this); |
| 1988 | EMIT(0xDF); |
| 1989 | EMIT(0xE9); |
| 1990 | } |
| 1991 | |
| 1992 | |
| 1993 | void Assembler::fcompp() { |
| 1994 | EnsureSpace ensure_space(this); |
| 1995 | EMIT(0xDE); |
| 1996 | EMIT(0xD9); |
| 1997 | } |
| 1998 | |
| 1999 | |
| 2000 | void Assembler::fnstsw_ax() { |
| 2001 | EnsureSpace ensure_space(this); |
| 2002 | EMIT(0xDF); |
| 2003 | EMIT(0xE0); |
| 2004 | } |
| 2005 | |
| 2006 | |
| 2007 | void Assembler::fwait() { |
| 2008 | EnsureSpace ensure_space(this); |
| 2009 | EMIT(0x9B); |
| 2010 | } |
| 2011 | |
| 2012 | |
| 2013 | void Assembler::frndint() { |
| 2014 | EnsureSpace ensure_space(this); |
| 2015 | EMIT(0xD9); |
| 2016 | EMIT(0xFC); |
| 2017 | } |
| 2018 | |
| 2019 | |
| 2020 | void Assembler::fnclex() { |
| 2021 | EnsureSpace ensure_space(this); |
| 2022 | EMIT(0xDB); |
| 2023 | EMIT(0xE2); |
| 2024 | } |
| 2025 | |
| 2026 | |
| 2027 | void Assembler::fnsave(const Operand& adr) { |
| 2028 | EnsureSpace ensure_space(this); |
| 2029 | EMIT(0xDD); |
| 2030 | emit_operand(esi, adr); |
| 2031 | } |
| 2032 | |
| 2033 | |
| 2034 | void Assembler::frstor(const Operand& adr) { |
| 2035 | EnsureSpace ensure_space(this); |
| 2036 | EMIT(0xDD); |
| 2037 | emit_operand(esp, adr); |
| 2038 | } |
| 2039 | |
| 2040 | |
| 2041 | void Assembler::sahf() { |
| 2042 | EnsureSpace ensure_space(this); |
| 2043 | EMIT(0x9E); |
| 2044 | } |
| 2045 | |
| 2046 | |
| 2047 | void Assembler::setcc(Condition cc, Register reg) { |
| 2048 | DCHECK(reg.is_byte_register()); |
| 2049 | EnsureSpace ensure_space(this); |
| 2050 | EMIT(0x0F); |
| 2051 | EMIT(0x90 | cc); |
| 2052 | EMIT(0xC0 | reg.code()); |
| 2053 | } |
| 2054 | |
| 2055 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2056 | void Assembler::GrowBuffer() { |
| 2057 | DCHECK(buffer_overflow()); |
| 2058 | if (!own_buffer_) FATAL("external code buffer is too small"); |
| 2059 | |
| 2060 | // Compute new buffer size. |
| 2061 | CodeDesc desc; // the new buffer |
| 2062 | desc.buffer_size = 2 * buffer_size_; |
| 2063 | |
| 2064 | // Some internal data structures overflow for very large buffers, |
| 2065 | // they must ensure that kMaximalBufferSize is not too large. |
| 2066 | if ((desc.buffer_size > kMaximalBufferSize) || |
| 2067 | (desc.buffer_size > isolate()->heap()->MaxOldGenerationSize())) { |
| 2068 | V8::FatalProcessOutOfMemory("Assembler::GrowBuffer"); |
| 2069 | } |
| 2070 | |
| 2071 | // Set up new buffer. |
| 2072 | desc.buffer = NewArray<byte>(desc.buffer_size); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2073 | desc.origin = this; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2074 | desc.instr_size = pc_offset(); |
| 2075 | desc.reloc_size = (buffer_ + buffer_size_) - (reloc_info_writer.pos()); |
| 2076 | |
| 2077 | // Clear the buffer in debug mode. Use 'int3' instructions to make |
| 2078 | // sure to get into problems if we ever run uninitialized code. |
| 2079 | #ifdef DEBUG |
| 2080 | memset(desc.buffer, 0xCC, desc.buffer_size); |
| 2081 | #endif |
| 2082 | |
| 2083 | // Copy the data. |
| 2084 | int pc_delta = desc.buffer - buffer_; |
| 2085 | int rc_delta = (desc.buffer + desc.buffer_size) - (buffer_ + buffer_size_); |
| 2086 | MemMove(desc.buffer, buffer_, desc.instr_size); |
| 2087 | MemMove(rc_delta + reloc_info_writer.pos(), reloc_info_writer.pos(), |
| 2088 | desc.reloc_size); |
| 2089 | |
| 2090 | DeleteArray(buffer_); |
| 2091 | buffer_ = desc.buffer; |
| 2092 | buffer_size_ = desc.buffer_size; |
| 2093 | pc_ += pc_delta; |
| 2094 | reloc_info_writer.Reposition(reloc_info_writer.pos() + rc_delta, |
| 2095 | reloc_info_writer.last_pc() + pc_delta); |
| 2096 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2097 | // Relocate internal references. |
| 2098 | for (auto pos : internal_reference_positions_) { |
| 2099 | int32_t* p = reinterpret_cast<int32_t*>(buffer_ + pos); |
| 2100 | *p += pc_delta; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2101 | } |
| 2102 | |
| 2103 | DCHECK(!buffer_overflow()); |
| 2104 | } |
| 2105 | |
| 2106 | |
| 2107 | void Assembler::emit_arith_b(int op1, int op2, Register dst, int imm8) { |
| 2108 | DCHECK(is_uint8(op1) && is_uint8(op2)); // wrong opcode |
| 2109 | DCHECK(is_uint8(imm8)); |
| 2110 | DCHECK((op1 & 0x01) == 0); // should be 8bit operation |
| 2111 | EMIT(op1); |
| 2112 | EMIT(op2 | dst.code()); |
| 2113 | EMIT(imm8); |
| 2114 | } |
| 2115 | |
| 2116 | |
| 2117 | void Assembler::emit_arith(int sel, Operand dst, const Immediate& x) { |
| 2118 | DCHECK((0 <= sel) && (sel <= 7)); |
| 2119 | Register ireg = { sel }; |
| 2120 | if (x.is_int8()) { |
| 2121 | EMIT(0x83); // using a sign-extended 8-bit immediate. |
| 2122 | emit_operand(ireg, dst); |
| 2123 | EMIT(x.x_ & 0xFF); |
| 2124 | } else if (dst.is_reg(eax)) { |
| 2125 | EMIT((sel << 3) | 0x05); // short form if the destination is eax. |
| 2126 | emit(x); |
| 2127 | } else { |
| 2128 | EMIT(0x81); // using a literal 32-bit immediate. |
| 2129 | emit_operand(ireg, dst); |
| 2130 | emit(x); |
| 2131 | } |
| 2132 | } |
| 2133 | |
| 2134 | |
| 2135 | void Assembler::emit_operand(Register reg, const Operand& adr) { |
| 2136 | const unsigned length = adr.len_; |
| 2137 | DCHECK(length > 0); |
| 2138 | |
| 2139 | // Emit updated ModRM byte containing the given register. |
| 2140 | pc_[0] = (adr.buf_[0] & ~0x38) | (reg.code() << 3); |
| 2141 | |
| 2142 | // Emit the rest of the encoded operand. |
| 2143 | for (unsigned i = 1; i < length; i++) pc_[i] = adr.buf_[i]; |
| 2144 | pc_ += length; |
| 2145 | |
| 2146 | // Emit relocation information if necessary. |
| 2147 | if (length >= sizeof(int32_t) && !RelocInfo::IsNone(adr.rmode_)) { |
| 2148 | pc_ -= sizeof(int32_t); // pc_ must be *at* disp32 |
| 2149 | RecordRelocInfo(adr.rmode_); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2150 | if (adr.rmode_ == RelocInfo::INTERNAL_REFERENCE) { // Fixup for labels |
| 2151 | emit_label(*reinterpret_cast<Label**>(pc_)); |
| 2152 | } else { |
| 2153 | pc_ += sizeof(int32_t); |
| 2154 | } |
| 2155 | } |
| 2156 | } |
| 2157 | |
| 2158 | |
| 2159 | void Assembler::emit_label(Label* label) { |
| 2160 | if (label->is_bound()) { |
| 2161 | internal_reference_positions_.push_back(pc_offset()); |
| 2162 | emit(reinterpret_cast<uint32_t>(buffer_ + label->pos())); |
| 2163 | } else { |
| 2164 | emit_disp(label, Displacement::CODE_ABSOLUTE); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2165 | } |
| 2166 | } |
| 2167 | |
| 2168 | |
| 2169 | void Assembler::emit_farith(int b1, int b2, int i) { |
| 2170 | DCHECK(is_uint8(b1) && is_uint8(b2)); // wrong opcode |
| 2171 | DCHECK(0 <= i && i < 8); // illegal stack offset |
| 2172 | EMIT(b1); |
| 2173 | EMIT(b2 + i); |
| 2174 | } |
| 2175 | |
| 2176 | |
| 2177 | void Assembler::db(uint8_t data) { |
| 2178 | EnsureSpace ensure_space(this); |
| 2179 | EMIT(data); |
| 2180 | } |
| 2181 | |
| 2182 | |
| 2183 | void Assembler::dd(uint32_t data) { |
| 2184 | EnsureSpace ensure_space(this); |
| 2185 | emit(data); |
| 2186 | } |
| 2187 | |
| 2188 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2189 | void Assembler::dq(uint64_t data) { |
| 2190 | EnsureSpace ensure_space(this); |
| 2191 | emit_q(data); |
| 2192 | } |
| 2193 | |
| 2194 | |
| 2195 | void Assembler::dd(Label* label) { |
| 2196 | EnsureSpace ensure_space(this); |
| 2197 | RecordRelocInfo(RelocInfo::INTERNAL_REFERENCE); |
| 2198 | emit_label(label); |
| 2199 | } |
| 2200 | |
| 2201 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2202 | void Assembler::RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data) { |
| 2203 | DCHECK(!RelocInfo::IsNone(rmode)); |
| 2204 | // Don't record external references unless the heap will be serialized. |
| 2205 | if (rmode == RelocInfo::EXTERNAL_REFERENCE && |
| 2206 | !serializer_enabled() && !emit_debug_code()) { |
| 2207 | return; |
| 2208 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2209 | RelocInfo rinfo(isolate(), pc_, rmode, data, NULL); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2210 | reloc_info_writer.Write(&rinfo); |
| 2211 | } |
| 2212 | |
| 2213 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2214 | #ifdef GENERATED_CODE_COVERAGE |
| 2215 | static FILE* coverage_log = NULL; |
| 2216 | |
| 2217 | |
| 2218 | static void InitCoverageLog() { |
| 2219 | char* file_name = getenv("V8_GENERATED_CODE_COVERAGE_LOG"); |
| 2220 | if (file_name != NULL) { |
| 2221 | coverage_log = fopen(file_name, "aw+"); |
| 2222 | } |
| 2223 | } |
| 2224 | |
| 2225 | |
| 2226 | void LogGeneratedCodeCoverage(const char* file_line) { |
| 2227 | const char* return_address = (&file_line)[-1]; |
| 2228 | char* push_insn = const_cast<char*>(return_address - 12); |
| 2229 | push_insn[0] = 0xeb; // Relative branch insn. |
| 2230 | push_insn[1] = 13; // Skip over coverage insns. |
| 2231 | if (coverage_log != NULL) { |
| 2232 | fprintf(coverage_log, "%s\n", file_line); |
| 2233 | fflush(coverage_log); |
| 2234 | } |
| 2235 | } |
| 2236 | |
| 2237 | #endif |
| 2238 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2239 | } // namespace internal |
| 2240 | } // namespace v8 |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2241 | |
| 2242 | #endif // V8_TARGET_ARCH_X87 |