Steve Block | a7e24c1 | 2009-10-30 11:49:00 +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 2006-2008 the V8 project authors. All rights reserved. |
| 36 | |
| 37 | #include "v8.h" |
| 38 | |
| 39 | #include "disassembler.h" |
| 40 | #include "macro-assembler.h" |
| 41 | #include "serialize.h" |
| 42 | |
| 43 | namespace v8 { |
| 44 | namespace internal { |
| 45 | |
| 46 | // ----------------------------------------------------------------------------- |
| 47 | // Implementation of CpuFeatures |
| 48 | |
| 49 | // Safe default is no features. |
| 50 | uint64_t CpuFeatures::supported_ = 0; |
| 51 | uint64_t CpuFeatures::enabled_ = 0; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 52 | uint64_t CpuFeatures::found_by_runtime_probing_ = 0; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 53 | |
| 54 | |
| 55 | // The Probe method needs executable memory, so it uses Heap::CreateCode. |
| 56 | // Allocation failure is silent and leads to safe default. |
| 57 | void CpuFeatures::Probe() { |
| 58 | ASSERT(Heap::HasBeenSetup()); |
| 59 | ASSERT(supported_ == 0); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 60 | if (Serializer::enabled()) { |
| 61 | supported_ |= OS::CpuFeaturesImpliedByPlatform(); |
| 62 | return; // No features if we might serialize. |
| 63 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 64 | |
| 65 | Assembler assm(NULL, 0); |
| 66 | Label cpuid, done; |
| 67 | #define __ assm. |
| 68 | // Save old esp, since we are going to modify the stack. |
| 69 | __ push(ebp); |
| 70 | __ pushfd(); |
| 71 | __ push(ecx); |
| 72 | __ push(ebx); |
| 73 | __ mov(ebp, Operand(esp)); |
| 74 | |
| 75 | // If we can modify bit 21 of the EFLAGS register, then CPUID is supported. |
| 76 | __ pushfd(); |
| 77 | __ pop(eax); |
| 78 | __ mov(edx, Operand(eax)); |
| 79 | __ xor_(eax, 0x200000); // Flip bit 21. |
| 80 | __ push(eax); |
| 81 | __ popfd(); |
| 82 | __ pushfd(); |
| 83 | __ pop(eax); |
| 84 | __ xor_(eax, Operand(edx)); // Different if CPUID is supported. |
| 85 | __ j(not_zero, &cpuid); |
| 86 | |
| 87 | // CPUID not supported. Clear the supported features in edx:eax. |
| 88 | __ xor_(eax, Operand(eax)); |
| 89 | __ xor_(edx, Operand(edx)); |
| 90 | __ jmp(&done); |
| 91 | |
| 92 | // Invoke CPUID with 1 in eax to get feature information in |
| 93 | // ecx:edx. Temporarily enable CPUID support because we know it's |
| 94 | // safe here. |
| 95 | __ bind(&cpuid); |
| 96 | __ mov(eax, 1); |
| 97 | supported_ = (1 << CPUID); |
| 98 | { Scope fscope(CPUID); |
| 99 | __ cpuid(); |
| 100 | } |
| 101 | supported_ = 0; |
| 102 | |
| 103 | // Move the result from ecx:edx to edx:eax and make sure to mark the |
| 104 | // CPUID feature as supported. |
| 105 | __ mov(eax, Operand(edx)); |
| 106 | __ or_(eax, 1 << CPUID); |
| 107 | __ mov(edx, Operand(ecx)); |
| 108 | |
| 109 | // Done. |
| 110 | __ bind(&done); |
| 111 | __ mov(esp, Operand(ebp)); |
| 112 | __ pop(ebx); |
| 113 | __ pop(ecx); |
| 114 | __ popfd(); |
| 115 | __ pop(ebp); |
| 116 | __ ret(0); |
| 117 | #undef __ |
| 118 | |
| 119 | CodeDesc desc; |
| 120 | assm.GetCode(&desc); |
| 121 | Object* code = Heap::CreateCode(desc, |
| 122 | NULL, |
| 123 | Code::ComputeFlags(Code::STUB), |
| 124 | Handle<Code>::null()); |
| 125 | if (!code->IsCode()) return; |
| 126 | LOG(CodeCreateEvent(Logger::BUILTIN_TAG, |
| 127 | Code::cast(code), "CpuFeatures::Probe")); |
| 128 | typedef uint64_t (*F0)(); |
| 129 | F0 probe = FUNCTION_CAST<F0>(Code::cast(code)->entry()); |
| 130 | supported_ = probe(); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 131 | found_by_runtime_probing_ = supported_; |
| 132 | uint64_t os_guarantees = OS::CpuFeaturesImpliedByPlatform(); |
| 133 | supported_ |= os_guarantees; |
| 134 | found_by_runtime_probing_ &= ~os_guarantees; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 135 | } |
| 136 | |
| 137 | |
| 138 | // ----------------------------------------------------------------------------- |
| 139 | // Implementation of Displacement |
| 140 | |
| 141 | void Displacement::init(Label* L, Type type) { |
| 142 | ASSERT(!L->is_bound()); |
| 143 | int next = 0; |
| 144 | if (L->is_linked()) { |
| 145 | next = L->pos(); |
| 146 | ASSERT(next > 0); // Displacements must be at positions > 0 |
| 147 | } |
| 148 | // Ensure that we _never_ overflow the next field. |
| 149 | ASSERT(NextField::is_valid(Assembler::kMaximalBufferSize)); |
| 150 | data_ = NextField::encode(next) | TypeField::encode(type); |
| 151 | } |
| 152 | |
| 153 | |
| 154 | // ----------------------------------------------------------------------------- |
| 155 | // Implementation of RelocInfo |
| 156 | |
| 157 | |
| 158 | const int RelocInfo::kApplyMask = |
| 159 | RelocInfo::kCodeTargetMask | 1 << RelocInfo::RUNTIME_ENTRY | |
| 160 | 1 << RelocInfo::JS_RETURN | 1 << RelocInfo::INTERNAL_REFERENCE; |
| 161 | |
| 162 | |
| 163 | void RelocInfo::PatchCode(byte* instructions, int instruction_count) { |
| 164 | // Patch the code at the current address with the supplied instructions. |
| 165 | for (int i = 0; i < instruction_count; i++) { |
| 166 | *(pc_ + i) = *(instructions + i); |
| 167 | } |
| 168 | |
| 169 | // Indicate that code has changed. |
| 170 | CPU::FlushICache(pc_, instruction_count); |
| 171 | } |
| 172 | |
| 173 | |
| 174 | // Patch the code at the current PC with a call to the target address. |
| 175 | // Additional guard int3 instructions can be added if required. |
| 176 | void RelocInfo::PatchCodeWithCall(Address target, int guard_bytes) { |
| 177 | // Call instruction takes up 5 bytes and int3 takes up one byte. |
| 178 | static const int kCallCodeSize = 5; |
| 179 | int code_size = kCallCodeSize + guard_bytes; |
| 180 | |
| 181 | // Create a code patcher. |
| 182 | CodePatcher patcher(pc_, code_size); |
| 183 | |
| 184 | // Add a label for checking the size of the code used for returning. |
| 185 | #ifdef DEBUG |
| 186 | Label check_codesize; |
| 187 | patcher.masm()->bind(&check_codesize); |
| 188 | #endif |
| 189 | |
| 190 | // Patch the code. |
| 191 | patcher.masm()->call(target, RelocInfo::NONE); |
| 192 | |
| 193 | // Check that the size of the code generated is as expected. |
| 194 | ASSERT_EQ(kCallCodeSize, |
| 195 | patcher.masm()->SizeOfCodeGeneratedSince(&check_codesize)); |
| 196 | |
| 197 | // Add the requested number of int3 instructions after the call. |
| 198 | for (int i = 0; i < guard_bytes; i++) { |
| 199 | patcher.masm()->int3(); |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | |
| 204 | // ----------------------------------------------------------------------------- |
| 205 | // Implementation of Operand |
| 206 | |
| 207 | Operand::Operand(Register base, int32_t disp, RelocInfo::Mode rmode) { |
| 208 | // [base + disp/r] |
| 209 | if (disp == 0 && rmode == RelocInfo::NONE && !base.is(ebp)) { |
| 210 | // [base] |
| 211 | set_modrm(0, base); |
| 212 | if (base.is(esp)) set_sib(times_1, esp, base); |
| 213 | } else if (is_int8(disp) && rmode == RelocInfo::NONE) { |
| 214 | // [base + disp8] |
| 215 | set_modrm(1, base); |
| 216 | if (base.is(esp)) set_sib(times_1, esp, base); |
| 217 | set_disp8(disp); |
| 218 | } else { |
| 219 | // [base + disp/r] |
| 220 | set_modrm(2, base); |
| 221 | if (base.is(esp)) set_sib(times_1, esp, base); |
| 222 | set_dispr(disp, rmode); |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | |
| 227 | Operand::Operand(Register base, |
| 228 | Register index, |
| 229 | ScaleFactor scale, |
| 230 | int32_t disp, |
| 231 | RelocInfo::Mode rmode) { |
| 232 | ASSERT(!index.is(esp)); // illegal addressing mode |
| 233 | // [base + index*scale + disp/r] |
| 234 | if (disp == 0 && rmode == RelocInfo::NONE && !base.is(ebp)) { |
| 235 | // [base + index*scale] |
| 236 | set_modrm(0, esp); |
| 237 | set_sib(scale, index, base); |
| 238 | } else if (is_int8(disp) && rmode == RelocInfo::NONE) { |
| 239 | // [base + index*scale + disp8] |
| 240 | set_modrm(1, esp); |
| 241 | set_sib(scale, index, base); |
| 242 | set_disp8(disp); |
| 243 | } else { |
| 244 | // [base + index*scale + disp/r] |
| 245 | set_modrm(2, esp); |
| 246 | set_sib(scale, index, base); |
| 247 | set_dispr(disp, rmode); |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | |
| 252 | Operand::Operand(Register index, |
| 253 | ScaleFactor scale, |
| 254 | int32_t disp, |
| 255 | RelocInfo::Mode rmode) { |
| 256 | ASSERT(!index.is(esp)); // illegal addressing mode |
| 257 | // [index*scale + disp/r] |
| 258 | set_modrm(0, esp); |
| 259 | set_sib(scale, index, ebp); |
| 260 | set_dispr(disp, rmode); |
| 261 | } |
| 262 | |
| 263 | |
| 264 | bool Operand::is_reg(Register reg) const { |
| 265 | return ((buf_[0] & 0xF8) == 0xC0) // addressing mode is register only. |
| 266 | && ((buf_[0] & 0x07) == reg.code()); // register codes match. |
| 267 | } |
| 268 | |
| 269 | // ----------------------------------------------------------------------------- |
| 270 | // Implementation of Assembler |
| 271 | |
| 272 | // Emit a single byte. Must always be inlined. |
| 273 | #define EMIT(x) \ |
| 274 | *pc_++ = (x) |
| 275 | |
| 276 | |
| 277 | #ifdef GENERATED_CODE_COVERAGE |
| 278 | static void InitCoverageLog(); |
| 279 | #endif |
| 280 | |
| 281 | // spare_buffer_ |
| 282 | byte* Assembler::spare_buffer_ = NULL; |
| 283 | |
| 284 | Assembler::Assembler(void* buffer, int buffer_size) { |
| 285 | if (buffer == NULL) { |
| 286 | // do our own buffer management |
| 287 | if (buffer_size <= kMinimalBufferSize) { |
| 288 | buffer_size = kMinimalBufferSize; |
| 289 | |
| 290 | if (spare_buffer_ != NULL) { |
| 291 | buffer = spare_buffer_; |
| 292 | spare_buffer_ = NULL; |
| 293 | } |
| 294 | } |
| 295 | if (buffer == NULL) { |
| 296 | buffer_ = NewArray<byte>(buffer_size); |
| 297 | } else { |
| 298 | buffer_ = static_cast<byte*>(buffer); |
| 299 | } |
| 300 | buffer_size_ = buffer_size; |
| 301 | own_buffer_ = true; |
| 302 | } else { |
| 303 | // use externally provided buffer instead |
| 304 | ASSERT(buffer_size > 0); |
| 305 | buffer_ = static_cast<byte*>(buffer); |
| 306 | buffer_size_ = buffer_size; |
| 307 | own_buffer_ = false; |
| 308 | } |
| 309 | |
| 310 | // Clear the buffer in debug mode unless it was provided by the |
| 311 | // caller in which case we can't be sure it's okay to overwrite |
| 312 | // existing code in it; see CodePatcher::CodePatcher(...). |
| 313 | #ifdef DEBUG |
| 314 | if (own_buffer_) { |
| 315 | memset(buffer_, 0xCC, buffer_size); // int3 |
| 316 | } |
| 317 | #endif |
| 318 | |
| 319 | // setup buffer pointers |
| 320 | ASSERT(buffer_ != NULL); |
| 321 | pc_ = buffer_; |
| 322 | reloc_info_writer.Reposition(buffer_ + buffer_size, pc_); |
| 323 | |
| 324 | last_pc_ = NULL; |
| 325 | current_statement_position_ = RelocInfo::kNoPosition; |
| 326 | current_position_ = RelocInfo::kNoPosition; |
| 327 | written_statement_position_ = current_statement_position_; |
| 328 | written_position_ = current_position_; |
| 329 | #ifdef GENERATED_CODE_COVERAGE |
| 330 | InitCoverageLog(); |
| 331 | #endif |
| 332 | } |
| 333 | |
| 334 | |
| 335 | Assembler::~Assembler() { |
| 336 | if (own_buffer_) { |
| 337 | if (spare_buffer_ == NULL && buffer_size_ == kMinimalBufferSize) { |
| 338 | spare_buffer_ = buffer_; |
| 339 | } else { |
| 340 | DeleteArray(buffer_); |
| 341 | } |
| 342 | } |
| 343 | } |
| 344 | |
| 345 | |
| 346 | void Assembler::GetCode(CodeDesc* desc) { |
| 347 | // finalize code |
| 348 | // (at this point overflow() may be true, but the gap ensures that |
| 349 | // we are still not overlapping instructions and relocation info) |
| 350 | ASSERT(pc_ <= reloc_info_writer.pos()); // no overlap |
| 351 | // setup desc |
| 352 | desc->buffer = buffer_; |
| 353 | desc->buffer_size = buffer_size_; |
| 354 | desc->instr_size = pc_offset(); |
| 355 | desc->reloc_size = (buffer_ + buffer_size_) - reloc_info_writer.pos(); |
| 356 | desc->origin = this; |
| 357 | |
| 358 | Counters::reloc_info_size.Increment(desc->reloc_size); |
| 359 | } |
| 360 | |
| 361 | |
| 362 | void Assembler::Align(int m) { |
| 363 | ASSERT(IsPowerOf2(m)); |
| 364 | while ((pc_offset() & (m - 1)) != 0) { |
| 365 | nop(); |
| 366 | } |
| 367 | } |
| 368 | |
| 369 | |
| 370 | void Assembler::cpuid() { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 371 | ASSERT(CpuFeatures::IsEnabled(CPUID)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 372 | EnsureSpace ensure_space(this); |
| 373 | last_pc_ = pc_; |
| 374 | EMIT(0x0F); |
| 375 | EMIT(0xA2); |
| 376 | } |
| 377 | |
| 378 | |
| 379 | void Assembler::pushad() { |
| 380 | EnsureSpace ensure_space(this); |
| 381 | last_pc_ = pc_; |
| 382 | EMIT(0x60); |
| 383 | } |
| 384 | |
| 385 | |
| 386 | void Assembler::popad() { |
| 387 | EnsureSpace ensure_space(this); |
| 388 | last_pc_ = pc_; |
| 389 | EMIT(0x61); |
| 390 | } |
| 391 | |
| 392 | |
| 393 | void Assembler::pushfd() { |
| 394 | EnsureSpace ensure_space(this); |
| 395 | last_pc_ = pc_; |
| 396 | EMIT(0x9C); |
| 397 | } |
| 398 | |
| 399 | |
| 400 | void Assembler::popfd() { |
| 401 | EnsureSpace ensure_space(this); |
| 402 | last_pc_ = pc_; |
| 403 | EMIT(0x9D); |
| 404 | } |
| 405 | |
| 406 | |
| 407 | void Assembler::push(const Immediate& x) { |
| 408 | EnsureSpace ensure_space(this); |
| 409 | last_pc_ = pc_; |
| 410 | if (x.is_int8()) { |
| 411 | EMIT(0x6a); |
| 412 | EMIT(x.x_); |
| 413 | } else { |
| 414 | EMIT(0x68); |
| 415 | emit(x); |
| 416 | } |
| 417 | } |
| 418 | |
| 419 | |
| 420 | void Assembler::push(Register src) { |
| 421 | EnsureSpace ensure_space(this); |
| 422 | last_pc_ = pc_; |
| 423 | EMIT(0x50 | src.code()); |
| 424 | } |
| 425 | |
| 426 | |
| 427 | void Assembler::push(const Operand& src) { |
| 428 | EnsureSpace ensure_space(this); |
| 429 | last_pc_ = pc_; |
| 430 | EMIT(0xFF); |
| 431 | emit_operand(esi, src); |
| 432 | } |
| 433 | |
| 434 | |
| 435 | void Assembler::pop(Register dst) { |
| 436 | ASSERT(reloc_info_writer.last_pc() != NULL); |
| 437 | if (FLAG_push_pop_elimination && (reloc_info_writer.last_pc() <= last_pc_)) { |
| 438 | // (last_pc_ != NULL) is rolled into the above check |
| 439 | // If a last_pc_ is set, we need to make sure that there has not been any |
| 440 | // relocation information generated between the last instruction and this |
| 441 | // pop instruction. |
| 442 | byte instr = last_pc_[0]; |
| 443 | if ((instr & ~0x7) == 0x50) { |
| 444 | int push_reg_code = instr & 0x7; |
| 445 | if (push_reg_code == dst.code()) { |
| 446 | pc_ = last_pc_; |
| 447 | if (FLAG_print_push_pop_elimination) { |
| 448 | PrintF("%d push/pop (same reg) eliminated\n", pc_offset()); |
| 449 | } |
| 450 | } else { |
| 451 | // Convert 'push src; pop dst' to 'mov dst, src'. |
| 452 | last_pc_[0] = 0x8b; |
| 453 | Register src = { push_reg_code }; |
| 454 | EnsureSpace ensure_space(this); |
| 455 | emit_operand(dst, Operand(src)); |
| 456 | if (FLAG_print_push_pop_elimination) { |
| 457 | PrintF("%d push/pop (reg->reg) eliminated\n", pc_offset()); |
| 458 | } |
| 459 | } |
| 460 | last_pc_ = NULL; |
| 461 | return; |
| 462 | } else if (instr == 0xff) { // push of an operand, convert to a move |
| 463 | byte op1 = last_pc_[1]; |
| 464 | // Check if the operation is really a push |
| 465 | if ((op1 & 0x38) == (6 << 3)) { |
| 466 | op1 = (op1 & ~0x38) | static_cast<byte>(dst.code() << 3); |
| 467 | last_pc_[0] = 0x8b; |
| 468 | last_pc_[1] = op1; |
| 469 | last_pc_ = NULL; |
| 470 | if (FLAG_print_push_pop_elimination) { |
| 471 | PrintF("%d push/pop (op->reg) eliminated\n", pc_offset()); |
| 472 | } |
| 473 | return; |
| 474 | } |
| 475 | } else if ((instr == 0x89) && |
| 476 | (last_pc_[1] == 0x04) && |
| 477 | (last_pc_[2] == 0x24)) { |
| 478 | // 0x71283c 396 890424 mov [esp],eax |
| 479 | // 0x71283f 399 58 pop eax |
| 480 | if (dst.is(eax)) { |
| 481 | // change to |
| 482 | // 0x710fac 216 83c404 add esp,0x4 |
| 483 | last_pc_[0] = 0x83; |
| 484 | last_pc_[1] = 0xc4; |
| 485 | last_pc_[2] = 0x04; |
| 486 | last_pc_ = NULL; |
| 487 | if (FLAG_print_push_pop_elimination) { |
| 488 | PrintF("%d push/pop (mov-pop) eliminated\n", pc_offset()); |
| 489 | } |
| 490 | return; |
| 491 | } |
| 492 | } else if (instr == 0x6a && dst.is(eax)) { // push of immediate 8 bit |
| 493 | byte imm8 = last_pc_[1]; |
| 494 | if (imm8 == 0) { |
| 495 | // 6a00 push 0x0 |
| 496 | // 58 pop eax |
| 497 | last_pc_[0] = 0x31; |
| 498 | last_pc_[1] = 0xc0; |
| 499 | // change to |
| 500 | // 31c0 xor eax,eax |
| 501 | last_pc_ = NULL; |
| 502 | if (FLAG_print_push_pop_elimination) { |
| 503 | PrintF("%d push/pop (imm->reg) eliminated\n", pc_offset()); |
| 504 | } |
| 505 | return; |
| 506 | } else { |
| 507 | // 6a00 push 0xXX |
| 508 | // 58 pop eax |
| 509 | last_pc_[0] = 0xb8; |
| 510 | EnsureSpace ensure_space(this); |
| 511 | if ((imm8 & 0x80) != 0) { |
| 512 | EMIT(0xff); |
| 513 | EMIT(0xff); |
| 514 | EMIT(0xff); |
| 515 | // change to |
| 516 | // b8XXffffff mov eax,0xffffffXX |
| 517 | } else { |
| 518 | EMIT(0x00); |
| 519 | EMIT(0x00); |
| 520 | EMIT(0x00); |
| 521 | // change to |
| 522 | // b8XX000000 mov eax,0x000000XX |
| 523 | } |
| 524 | last_pc_ = NULL; |
| 525 | if (FLAG_print_push_pop_elimination) { |
| 526 | PrintF("%d push/pop (imm->reg) eliminated\n", pc_offset()); |
| 527 | } |
| 528 | return; |
| 529 | } |
| 530 | } else if (instr == 0x68 && dst.is(eax)) { // push of immediate 32 bit |
| 531 | // 68XXXXXXXX push 0xXXXXXXXX |
| 532 | // 58 pop eax |
| 533 | last_pc_[0] = 0xb8; |
| 534 | last_pc_ = NULL; |
| 535 | // change to |
| 536 | // b8XXXXXXXX mov eax,0xXXXXXXXX |
| 537 | if (FLAG_print_push_pop_elimination) { |
| 538 | PrintF("%d push/pop (imm->reg) eliminated\n", pc_offset()); |
| 539 | } |
| 540 | return; |
| 541 | } |
| 542 | |
| 543 | // Other potential patterns for peephole: |
| 544 | // 0x712716 102 890424 mov [esp], eax |
| 545 | // 0x712719 105 8b1424 mov edx, [esp] |
| 546 | } |
| 547 | EnsureSpace ensure_space(this); |
| 548 | last_pc_ = pc_; |
| 549 | EMIT(0x58 | dst.code()); |
| 550 | } |
| 551 | |
| 552 | |
| 553 | void Assembler::pop(const Operand& dst) { |
| 554 | EnsureSpace ensure_space(this); |
| 555 | last_pc_ = pc_; |
| 556 | EMIT(0x8F); |
| 557 | emit_operand(eax, dst); |
| 558 | } |
| 559 | |
| 560 | |
| 561 | void Assembler::enter(const Immediate& size) { |
| 562 | EnsureSpace ensure_space(this); |
| 563 | last_pc_ = pc_; |
| 564 | EMIT(0xC8); |
| 565 | emit_w(size); |
| 566 | EMIT(0); |
| 567 | } |
| 568 | |
| 569 | |
| 570 | void Assembler::leave() { |
| 571 | EnsureSpace ensure_space(this); |
| 572 | last_pc_ = pc_; |
| 573 | EMIT(0xC9); |
| 574 | } |
| 575 | |
| 576 | |
| 577 | void Assembler::mov_b(Register dst, const Operand& src) { |
| 578 | EnsureSpace ensure_space(this); |
| 579 | last_pc_ = pc_; |
| 580 | EMIT(0x8A); |
| 581 | emit_operand(dst, src); |
| 582 | } |
| 583 | |
| 584 | |
| 585 | void Assembler::mov_b(const Operand& dst, int8_t imm8) { |
| 586 | EnsureSpace ensure_space(this); |
| 587 | last_pc_ = pc_; |
| 588 | EMIT(0xC6); |
| 589 | emit_operand(eax, dst); |
| 590 | EMIT(imm8); |
| 591 | } |
| 592 | |
| 593 | |
| 594 | void Assembler::mov_b(const Operand& dst, Register src) { |
| 595 | EnsureSpace ensure_space(this); |
| 596 | last_pc_ = pc_; |
| 597 | EMIT(0x88); |
| 598 | emit_operand(src, dst); |
| 599 | } |
| 600 | |
| 601 | |
| 602 | void Assembler::mov_w(Register dst, const Operand& src) { |
| 603 | EnsureSpace ensure_space(this); |
| 604 | last_pc_ = pc_; |
| 605 | EMIT(0x66); |
| 606 | EMIT(0x8B); |
| 607 | emit_operand(dst, src); |
| 608 | } |
| 609 | |
| 610 | |
| 611 | void Assembler::mov_w(const Operand& dst, Register src) { |
| 612 | EnsureSpace ensure_space(this); |
| 613 | last_pc_ = pc_; |
| 614 | EMIT(0x66); |
| 615 | EMIT(0x89); |
| 616 | emit_operand(src, dst); |
| 617 | } |
| 618 | |
| 619 | |
| 620 | void Assembler::mov(Register dst, int32_t imm32) { |
| 621 | EnsureSpace ensure_space(this); |
| 622 | last_pc_ = pc_; |
| 623 | EMIT(0xB8 | dst.code()); |
| 624 | emit(imm32); |
| 625 | } |
| 626 | |
| 627 | |
| 628 | void Assembler::mov(Register dst, const Immediate& x) { |
| 629 | EnsureSpace ensure_space(this); |
| 630 | last_pc_ = pc_; |
| 631 | EMIT(0xB8 | dst.code()); |
| 632 | emit(x); |
| 633 | } |
| 634 | |
| 635 | |
| 636 | void Assembler::mov(Register dst, Handle<Object> handle) { |
| 637 | EnsureSpace ensure_space(this); |
| 638 | last_pc_ = pc_; |
| 639 | EMIT(0xB8 | dst.code()); |
| 640 | emit(handle); |
| 641 | } |
| 642 | |
| 643 | |
| 644 | void Assembler::mov(Register dst, const Operand& src) { |
| 645 | EnsureSpace ensure_space(this); |
| 646 | last_pc_ = pc_; |
| 647 | EMIT(0x8B); |
| 648 | emit_operand(dst, src); |
| 649 | } |
| 650 | |
| 651 | |
| 652 | void Assembler::mov(Register dst, Register src) { |
| 653 | EnsureSpace ensure_space(this); |
| 654 | last_pc_ = pc_; |
| 655 | EMIT(0x89); |
| 656 | EMIT(0xC0 | src.code() << 3 | dst.code()); |
| 657 | } |
| 658 | |
| 659 | |
| 660 | void Assembler::mov(const Operand& dst, const Immediate& x) { |
| 661 | EnsureSpace ensure_space(this); |
| 662 | last_pc_ = pc_; |
| 663 | EMIT(0xC7); |
| 664 | emit_operand(eax, dst); |
| 665 | emit(x); |
| 666 | } |
| 667 | |
| 668 | |
| 669 | void Assembler::mov(const Operand& dst, Handle<Object> handle) { |
| 670 | EnsureSpace ensure_space(this); |
| 671 | last_pc_ = pc_; |
| 672 | EMIT(0xC7); |
| 673 | emit_operand(eax, dst); |
| 674 | emit(handle); |
| 675 | } |
| 676 | |
| 677 | |
| 678 | void Assembler::mov(const Operand& dst, Register src) { |
| 679 | EnsureSpace ensure_space(this); |
| 680 | last_pc_ = pc_; |
| 681 | EMIT(0x89); |
| 682 | emit_operand(src, dst); |
| 683 | } |
| 684 | |
| 685 | |
| 686 | void Assembler::movsx_b(Register dst, const Operand& src) { |
| 687 | EnsureSpace ensure_space(this); |
| 688 | last_pc_ = pc_; |
| 689 | EMIT(0x0F); |
| 690 | EMIT(0xBE); |
| 691 | emit_operand(dst, src); |
| 692 | } |
| 693 | |
| 694 | |
| 695 | void Assembler::movsx_w(Register dst, const Operand& src) { |
| 696 | EnsureSpace ensure_space(this); |
| 697 | last_pc_ = pc_; |
| 698 | EMIT(0x0F); |
| 699 | EMIT(0xBF); |
| 700 | emit_operand(dst, src); |
| 701 | } |
| 702 | |
| 703 | |
| 704 | void Assembler::movzx_b(Register dst, const Operand& src) { |
| 705 | EnsureSpace ensure_space(this); |
| 706 | last_pc_ = pc_; |
| 707 | EMIT(0x0F); |
| 708 | EMIT(0xB6); |
| 709 | emit_operand(dst, src); |
| 710 | } |
| 711 | |
| 712 | |
| 713 | void Assembler::movzx_w(Register dst, const Operand& src) { |
| 714 | EnsureSpace ensure_space(this); |
| 715 | last_pc_ = pc_; |
| 716 | EMIT(0x0F); |
| 717 | EMIT(0xB7); |
| 718 | emit_operand(dst, src); |
| 719 | } |
| 720 | |
| 721 | |
| 722 | void Assembler::cmov(Condition cc, Register dst, int32_t imm32) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 723 | ASSERT(CpuFeatures::IsEnabled(CMOV)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 724 | EnsureSpace ensure_space(this); |
| 725 | last_pc_ = pc_; |
| 726 | UNIMPLEMENTED(); |
| 727 | USE(cc); |
| 728 | USE(dst); |
| 729 | USE(imm32); |
| 730 | } |
| 731 | |
| 732 | |
| 733 | void Assembler::cmov(Condition cc, Register dst, Handle<Object> handle) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 734 | ASSERT(CpuFeatures::IsEnabled(CMOV)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 735 | EnsureSpace ensure_space(this); |
| 736 | last_pc_ = pc_; |
| 737 | UNIMPLEMENTED(); |
| 738 | USE(cc); |
| 739 | USE(dst); |
| 740 | USE(handle); |
| 741 | } |
| 742 | |
| 743 | |
| 744 | void Assembler::cmov(Condition cc, Register dst, const Operand& src) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 745 | ASSERT(CpuFeatures::IsEnabled(CMOV)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 746 | EnsureSpace ensure_space(this); |
| 747 | last_pc_ = pc_; |
| 748 | // Opcode: 0f 40 + cc /r |
| 749 | EMIT(0x0F); |
| 750 | EMIT(0x40 + cc); |
| 751 | emit_operand(dst, src); |
| 752 | } |
| 753 | |
| 754 | |
| 755 | void Assembler::xchg(Register dst, Register src) { |
| 756 | EnsureSpace ensure_space(this); |
| 757 | last_pc_ = pc_; |
| 758 | if (src.is(eax) || dst.is(eax)) { // Single-byte encoding |
| 759 | EMIT(0x90 | (src.is(eax) ? dst.code() : src.code())); |
| 760 | } else { |
| 761 | EMIT(0x87); |
| 762 | EMIT(0xC0 | src.code() << 3 | dst.code()); |
| 763 | } |
| 764 | } |
| 765 | |
| 766 | |
| 767 | void Assembler::adc(Register dst, int32_t imm32) { |
| 768 | EnsureSpace ensure_space(this); |
| 769 | last_pc_ = pc_; |
| 770 | emit_arith(2, Operand(dst), Immediate(imm32)); |
| 771 | } |
| 772 | |
| 773 | |
| 774 | void Assembler::adc(Register dst, const Operand& src) { |
| 775 | EnsureSpace ensure_space(this); |
| 776 | last_pc_ = pc_; |
| 777 | EMIT(0x13); |
| 778 | emit_operand(dst, src); |
| 779 | } |
| 780 | |
| 781 | |
| 782 | void Assembler::add(Register dst, const Operand& src) { |
| 783 | EnsureSpace ensure_space(this); |
| 784 | last_pc_ = pc_; |
| 785 | EMIT(0x03); |
| 786 | emit_operand(dst, src); |
| 787 | } |
| 788 | |
| 789 | |
| 790 | void Assembler::add(const Operand& dst, const Immediate& x) { |
| 791 | ASSERT(reloc_info_writer.last_pc() != NULL); |
| 792 | if (FLAG_push_pop_elimination && (reloc_info_writer.last_pc() <= last_pc_)) { |
| 793 | byte instr = last_pc_[0]; |
| 794 | if ((instr & 0xf8) == 0x50) { |
| 795 | // Last instruction was a push. Check whether this is a pop without a |
| 796 | // result. |
| 797 | if ((dst.is_reg(esp)) && |
| 798 | (x.x_ == kPointerSize) && (x.rmode_ == RelocInfo::NONE)) { |
| 799 | pc_ = last_pc_; |
| 800 | last_pc_ = NULL; |
| 801 | if (FLAG_print_push_pop_elimination) { |
| 802 | PrintF("%d push/pop(noreg) eliminated\n", pc_offset()); |
| 803 | } |
| 804 | return; |
| 805 | } |
| 806 | } |
| 807 | } |
| 808 | EnsureSpace ensure_space(this); |
| 809 | last_pc_ = pc_; |
| 810 | emit_arith(0, dst, x); |
| 811 | } |
| 812 | |
| 813 | |
| 814 | void Assembler::and_(Register dst, int32_t imm32) { |
| 815 | EnsureSpace ensure_space(this); |
| 816 | last_pc_ = pc_; |
| 817 | emit_arith(4, Operand(dst), Immediate(imm32)); |
| 818 | } |
| 819 | |
| 820 | |
| 821 | void Assembler::and_(Register dst, const Operand& src) { |
| 822 | EnsureSpace ensure_space(this); |
| 823 | last_pc_ = pc_; |
| 824 | EMIT(0x23); |
| 825 | emit_operand(dst, src); |
| 826 | } |
| 827 | |
| 828 | |
| 829 | void Assembler::and_(const Operand& dst, const Immediate& x) { |
| 830 | EnsureSpace ensure_space(this); |
| 831 | last_pc_ = pc_; |
| 832 | emit_arith(4, dst, x); |
| 833 | } |
| 834 | |
| 835 | |
| 836 | void Assembler::and_(const Operand& dst, Register src) { |
| 837 | EnsureSpace ensure_space(this); |
| 838 | last_pc_ = pc_; |
| 839 | EMIT(0x21); |
| 840 | emit_operand(src, dst); |
| 841 | } |
| 842 | |
| 843 | |
| 844 | void Assembler::cmpb(const Operand& op, int8_t imm8) { |
| 845 | EnsureSpace ensure_space(this); |
| 846 | last_pc_ = pc_; |
| 847 | EMIT(0x80); |
| 848 | emit_operand(edi, op); // edi == 7 |
| 849 | EMIT(imm8); |
| 850 | } |
| 851 | |
| 852 | |
| 853 | void Assembler::cmpw(const Operand& op, Immediate imm16) { |
| 854 | ASSERT(imm16.is_int16()); |
| 855 | EnsureSpace ensure_space(this); |
| 856 | last_pc_ = pc_; |
| 857 | EMIT(0x66); |
| 858 | EMIT(0x81); |
| 859 | emit_operand(edi, op); |
| 860 | emit_w(imm16); |
| 861 | } |
| 862 | |
| 863 | |
| 864 | void Assembler::cmp(Register reg, int32_t imm32) { |
| 865 | EnsureSpace ensure_space(this); |
| 866 | last_pc_ = pc_; |
| 867 | emit_arith(7, Operand(reg), Immediate(imm32)); |
| 868 | } |
| 869 | |
| 870 | |
| 871 | void Assembler::cmp(Register reg, Handle<Object> handle) { |
| 872 | EnsureSpace ensure_space(this); |
| 873 | last_pc_ = pc_; |
| 874 | emit_arith(7, Operand(reg), Immediate(handle)); |
| 875 | } |
| 876 | |
| 877 | |
| 878 | void Assembler::cmp(Register reg, const Operand& op) { |
| 879 | EnsureSpace ensure_space(this); |
| 880 | last_pc_ = pc_; |
| 881 | EMIT(0x3B); |
| 882 | emit_operand(reg, op); |
| 883 | } |
| 884 | |
| 885 | |
| 886 | void Assembler::cmp(const Operand& op, const Immediate& imm) { |
| 887 | EnsureSpace ensure_space(this); |
| 888 | last_pc_ = pc_; |
| 889 | emit_arith(7, op, imm); |
| 890 | } |
| 891 | |
| 892 | |
| 893 | void Assembler::cmp(const Operand& op, Handle<Object> handle) { |
| 894 | EnsureSpace ensure_space(this); |
| 895 | last_pc_ = pc_; |
| 896 | emit_arith(7, op, Immediate(handle)); |
| 897 | } |
| 898 | |
| 899 | |
| 900 | void Assembler::cmpb_al(const Operand& op) { |
| 901 | EnsureSpace ensure_space(this); |
| 902 | last_pc_ = pc_; |
| 903 | EMIT(0x38); // CMP r/m8, r8 |
| 904 | emit_operand(eax, op); // eax has same code as register al. |
| 905 | } |
| 906 | |
| 907 | |
| 908 | void Assembler::cmpw_ax(const Operand& op) { |
| 909 | EnsureSpace ensure_space(this); |
| 910 | last_pc_ = pc_; |
| 911 | EMIT(0x66); |
| 912 | EMIT(0x39); // CMP r/m16, r16 |
| 913 | emit_operand(eax, op); // eax has same code as register ax. |
| 914 | } |
| 915 | |
| 916 | |
| 917 | void Assembler::dec_b(Register dst) { |
| 918 | EnsureSpace ensure_space(this); |
| 919 | last_pc_ = pc_; |
| 920 | EMIT(0xFE); |
| 921 | EMIT(0xC8 | dst.code()); |
| 922 | } |
| 923 | |
| 924 | |
| 925 | void Assembler::dec(Register dst) { |
| 926 | EnsureSpace ensure_space(this); |
| 927 | last_pc_ = pc_; |
| 928 | EMIT(0x48 | dst.code()); |
| 929 | } |
| 930 | |
| 931 | |
| 932 | void Assembler::dec(const Operand& dst) { |
| 933 | EnsureSpace ensure_space(this); |
| 934 | last_pc_ = pc_; |
| 935 | EMIT(0xFF); |
| 936 | emit_operand(ecx, dst); |
| 937 | } |
| 938 | |
| 939 | |
| 940 | void Assembler::cdq() { |
| 941 | EnsureSpace ensure_space(this); |
| 942 | last_pc_ = pc_; |
| 943 | EMIT(0x99); |
| 944 | } |
| 945 | |
| 946 | |
| 947 | void Assembler::idiv(Register src) { |
| 948 | EnsureSpace ensure_space(this); |
| 949 | last_pc_ = pc_; |
| 950 | EMIT(0xF7); |
| 951 | EMIT(0xF8 | src.code()); |
| 952 | } |
| 953 | |
| 954 | |
| 955 | void Assembler::imul(Register reg) { |
| 956 | EnsureSpace ensure_space(this); |
| 957 | last_pc_ = pc_; |
| 958 | EMIT(0xF7); |
| 959 | EMIT(0xE8 | reg.code()); |
| 960 | } |
| 961 | |
| 962 | |
| 963 | void Assembler::imul(Register dst, const Operand& src) { |
| 964 | EnsureSpace ensure_space(this); |
| 965 | last_pc_ = pc_; |
| 966 | EMIT(0x0F); |
| 967 | EMIT(0xAF); |
| 968 | emit_operand(dst, src); |
| 969 | } |
| 970 | |
| 971 | |
| 972 | void Assembler::imul(Register dst, Register src, int32_t imm32) { |
| 973 | EnsureSpace ensure_space(this); |
| 974 | last_pc_ = pc_; |
| 975 | if (is_int8(imm32)) { |
| 976 | EMIT(0x6B); |
| 977 | EMIT(0xC0 | dst.code() << 3 | src.code()); |
| 978 | EMIT(imm32); |
| 979 | } else { |
| 980 | EMIT(0x69); |
| 981 | EMIT(0xC0 | dst.code() << 3 | src.code()); |
| 982 | emit(imm32); |
| 983 | } |
| 984 | } |
| 985 | |
| 986 | |
| 987 | void Assembler::inc(Register dst) { |
| 988 | EnsureSpace ensure_space(this); |
| 989 | last_pc_ = pc_; |
| 990 | EMIT(0x40 | dst.code()); |
| 991 | } |
| 992 | |
| 993 | |
| 994 | void Assembler::inc(const Operand& dst) { |
| 995 | EnsureSpace ensure_space(this); |
| 996 | last_pc_ = pc_; |
| 997 | EMIT(0xFF); |
| 998 | emit_operand(eax, dst); |
| 999 | } |
| 1000 | |
| 1001 | |
| 1002 | void Assembler::lea(Register dst, const Operand& src) { |
| 1003 | EnsureSpace ensure_space(this); |
| 1004 | last_pc_ = pc_; |
| 1005 | EMIT(0x8D); |
| 1006 | emit_operand(dst, src); |
| 1007 | } |
| 1008 | |
| 1009 | |
| 1010 | void Assembler::mul(Register src) { |
| 1011 | EnsureSpace ensure_space(this); |
| 1012 | last_pc_ = pc_; |
| 1013 | EMIT(0xF7); |
| 1014 | EMIT(0xE0 | src.code()); |
| 1015 | } |
| 1016 | |
| 1017 | |
| 1018 | void Assembler::neg(Register dst) { |
| 1019 | EnsureSpace ensure_space(this); |
| 1020 | last_pc_ = pc_; |
| 1021 | EMIT(0xF7); |
| 1022 | EMIT(0xD8 | dst.code()); |
| 1023 | } |
| 1024 | |
| 1025 | |
| 1026 | void Assembler::not_(Register dst) { |
| 1027 | EnsureSpace ensure_space(this); |
| 1028 | last_pc_ = pc_; |
| 1029 | EMIT(0xF7); |
| 1030 | EMIT(0xD0 | dst.code()); |
| 1031 | } |
| 1032 | |
| 1033 | |
| 1034 | void Assembler::or_(Register dst, int32_t imm32) { |
| 1035 | EnsureSpace ensure_space(this); |
| 1036 | last_pc_ = pc_; |
| 1037 | emit_arith(1, Operand(dst), Immediate(imm32)); |
| 1038 | } |
| 1039 | |
| 1040 | |
| 1041 | void Assembler::or_(Register dst, const Operand& src) { |
| 1042 | EnsureSpace ensure_space(this); |
| 1043 | last_pc_ = pc_; |
| 1044 | EMIT(0x0B); |
| 1045 | emit_operand(dst, src); |
| 1046 | } |
| 1047 | |
| 1048 | |
| 1049 | void Assembler::or_(const Operand& dst, const Immediate& x) { |
| 1050 | EnsureSpace ensure_space(this); |
| 1051 | last_pc_ = pc_; |
| 1052 | emit_arith(1, dst, x); |
| 1053 | } |
| 1054 | |
| 1055 | |
| 1056 | void Assembler::or_(const Operand& dst, Register src) { |
| 1057 | EnsureSpace ensure_space(this); |
| 1058 | last_pc_ = pc_; |
| 1059 | EMIT(0x09); |
| 1060 | emit_operand(src, dst); |
| 1061 | } |
| 1062 | |
| 1063 | |
| 1064 | void Assembler::rcl(Register dst, uint8_t imm8) { |
| 1065 | EnsureSpace ensure_space(this); |
| 1066 | last_pc_ = pc_; |
| 1067 | ASSERT(is_uint5(imm8)); // illegal shift count |
| 1068 | if (imm8 == 1) { |
| 1069 | EMIT(0xD1); |
| 1070 | EMIT(0xD0 | dst.code()); |
| 1071 | } else { |
| 1072 | EMIT(0xC1); |
| 1073 | EMIT(0xD0 | dst.code()); |
| 1074 | EMIT(imm8); |
| 1075 | } |
| 1076 | } |
| 1077 | |
| 1078 | |
| 1079 | void Assembler::sar(Register dst, uint8_t imm8) { |
| 1080 | EnsureSpace ensure_space(this); |
| 1081 | last_pc_ = pc_; |
| 1082 | ASSERT(is_uint5(imm8)); // illegal shift count |
| 1083 | if (imm8 == 1) { |
| 1084 | EMIT(0xD1); |
| 1085 | EMIT(0xF8 | dst.code()); |
| 1086 | } else { |
| 1087 | EMIT(0xC1); |
| 1088 | EMIT(0xF8 | dst.code()); |
| 1089 | EMIT(imm8); |
| 1090 | } |
| 1091 | } |
| 1092 | |
| 1093 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 1094 | void Assembler::sar_cl(Register dst) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1095 | EnsureSpace ensure_space(this); |
| 1096 | last_pc_ = pc_; |
| 1097 | EMIT(0xD3); |
| 1098 | EMIT(0xF8 | dst.code()); |
| 1099 | } |
| 1100 | |
| 1101 | |
| 1102 | void Assembler::sbb(Register dst, const Operand& src) { |
| 1103 | EnsureSpace ensure_space(this); |
| 1104 | last_pc_ = pc_; |
| 1105 | EMIT(0x1B); |
| 1106 | emit_operand(dst, src); |
| 1107 | } |
| 1108 | |
| 1109 | |
| 1110 | void Assembler::shld(Register dst, const Operand& src) { |
| 1111 | EnsureSpace ensure_space(this); |
| 1112 | last_pc_ = pc_; |
| 1113 | EMIT(0x0F); |
| 1114 | EMIT(0xA5); |
| 1115 | emit_operand(dst, src); |
| 1116 | } |
| 1117 | |
| 1118 | |
| 1119 | void Assembler::shl(Register dst, uint8_t imm8) { |
| 1120 | EnsureSpace ensure_space(this); |
| 1121 | last_pc_ = pc_; |
| 1122 | ASSERT(is_uint5(imm8)); // illegal shift count |
| 1123 | if (imm8 == 1) { |
| 1124 | EMIT(0xD1); |
| 1125 | EMIT(0xE0 | dst.code()); |
| 1126 | } else { |
| 1127 | EMIT(0xC1); |
| 1128 | EMIT(0xE0 | dst.code()); |
| 1129 | EMIT(imm8); |
| 1130 | } |
| 1131 | } |
| 1132 | |
| 1133 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 1134 | void Assembler::shl_cl(Register dst) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1135 | EnsureSpace ensure_space(this); |
| 1136 | last_pc_ = pc_; |
| 1137 | EMIT(0xD3); |
| 1138 | EMIT(0xE0 | dst.code()); |
| 1139 | } |
| 1140 | |
| 1141 | |
| 1142 | void Assembler::shrd(Register dst, const Operand& src) { |
| 1143 | EnsureSpace ensure_space(this); |
| 1144 | last_pc_ = pc_; |
| 1145 | EMIT(0x0F); |
| 1146 | EMIT(0xAD); |
| 1147 | emit_operand(dst, src); |
| 1148 | } |
| 1149 | |
| 1150 | |
| 1151 | void Assembler::shr(Register dst, uint8_t imm8) { |
| 1152 | EnsureSpace ensure_space(this); |
| 1153 | last_pc_ = pc_; |
| 1154 | ASSERT(is_uint5(imm8)); // illegal shift count |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 1155 | if (imm8 == 1) { |
| 1156 | EMIT(0xD1); |
| 1157 | EMIT(0xE8 | dst.code()); |
| 1158 | } else { |
| 1159 | EMIT(0xC1); |
| 1160 | EMIT(0xE8 | dst.code()); |
| 1161 | EMIT(imm8); |
| 1162 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1163 | } |
| 1164 | |
| 1165 | |
| 1166 | void Assembler::shr_cl(Register dst) { |
| 1167 | EnsureSpace ensure_space(this); |
| 1168 | last_pc_ = pc_; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 1169 | EMIT(0xD3); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1170 | EMIT(0xE8 | dst.code()); |
| 1171 | } |
| 1172 | |
| 1173 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1174 | void Assembler::subb(const Operand& op, int8_t imm8) { |
| 1175 | EnsureSpace ensure_space(this); |
| 1176 | last_pc_ = pc_; |
| 1177 | if (op.is_reg(eax)) { |
| 1178 | EMIT(0x2c); |
| 1179 | } else { |
| 1180 | EMIT(0x80); |
| 1181 | emit_operand(ebp, op); // ebp == 5 |
| 1182 | } |
| 1183 | EMIT(imm8); |
| 1184 | } |
| 1185 | |
| 1186 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1187 | void Assembler::sub(const Operand& dst, const Immediate& x) { |
| 1188 | EnsureSpace ensure_space(this); |
| 1189 | last_pc_ = pc_; |
| 1190 | emit_arith(5, dst, x); |
| 1191 | } |
| 1192 | |
| 1193 | |
| 1194 | void Assembler::sub(Register dst, const Operand& src) { |
| 1195 | EnsureSpace ensure_space(this); |
| 1196 | last_pc_ = pc_; |
| 1197 | EMIT(0x2B); |
| 1198 | emit_operand(dst, src); |
| 1199 | } |
| 1200 | |
| 1201 | |
| 1202 | void Assembler::sub(const Operand& dst, Register src) { |
| 1203 | EnsureSpace ensure_space(this); |
| 1204 | last_pc_ = pc_; |
| 1205 | EMIT(0x29); |
| 1206 | emit_operand(src, dst); |
| 1207 | } |
| 1208 | |
| 1209 | |
| 1210 | void Assembler::test(Register reg, const Immediate& imm) { |
| 1211 | EnsureSpace ensure_space(this); |
| 1212 | last_pc_ = pc_; |
| 1213 | // Only use test against byte for registers that have a byte |
| 1214 | // variant: eax, ebx, ecx, and edx. |
| 1215 | if (imm.rmode_ == RelocInfo::NONE && is_uint8(imm.x_) && reg.code() < 4) { |
| 1216 | uint8_t imm8 = imm.x_; |
| 1217 | if (reg.is(eax)) { |
| 1218 | EMIT(0xA8); |
| 1219 | EMIT(imm8); |
| 1220 | } else { |
| 1221 | emit_arith_b(0xF6, 0xC0, reg, imm8); |
| 1222 | } |
| 1223 | } else { |
| 1224 | // This is not using emit_arith because test doesn't support |
| 1225 | // sign-extension of 8-bit operands. |
| 1226 | if (reg.is(eax)) { |
| 1227 | EMIT(0xA9); |
| 1228 | } else { |
| 1229 | EMIT(0xF7); |
| 1230 | EMIT(0xC0 | reg.code()); |
| 1231 | } |
| 1232 | emit(imm); |
| 1233 | } |
| 1234 | } |
| 1235 | |
| 1236 | |
| 1237 | void Assembler::test(Register reg, const Operand& op) { |
| 1238 | EnsureSpace ensure_space(this); |
| 1239 | last_pc_ = pc_; |
| 1240 | EMIT(0x85); |
| 1241 | emit_operand(reg, op); |
| 1242 | } |
| 1243 | |
| 1244 | |
| 1245 | void Assembler::test(const Operand& op, const Immediate& imm) { |
| 1246 | EnsureSpace ensure_space(this); |
| 1247 | last_pc_ = pc_; |
| 1248 | EMIT(0xF7); |
| 1249 | emit_operand(eax, op); |
| 1250 | emit(imm); |
| 1251 | } |
| 1252 | |
| 1253 | |
| 1254 | void Assembler::xor_(Register dst, int32_t imm32) { |
| 1255 | EnsureSpace ensure_space(this); |
| 1256 | last_pc_ = pc_; |
| 1257 | emit_arith(6, Operand(dst), Immediate(imm32)); |
| 1258 | } |
| 1259 | |
| 1260 | |
| 1261 | void Assembler::xor_(Register dst, const Operand& src) { |
| 1262 | EnsureSpace ensure_space(this); |
| 1263 | last_pc_ = pc_; |
| 1264 | EMIT(0x33); |
| 1265 | emit_operand(dst, src); |
| 1266 | } |
| 1267 | |
| 1268 | |
| 1269 | void Assembler::xor_(const Operand& src, Register dst) { |
| 1270 | EnsureSpace ensure_space(this); |
| 1271 | last_pc_ = pc_; |
| 1272 | EMIT(0x31); |
| 1273 | emit_operand(dst, src); |
| 1274 | } |
| 1275 | |
| 1276 | |
| 1277 | void Assembler::xor_(const Operand& dst, const Immediate& x) { |
| 1278 | EnsureSpace ensure_space(this); |
| 1279 | last_pc_ = pc_; |
| 1280 | emit_arith(6, dst, x); |
| 1281 | } |
| 1282 | |
| 1283 | |
| 1284 | void Assembler::bt(const Operand& dst, Register src) { |
| 1285 | EnsureSpace ensure_space(this); |
| 1286 | last_pc_ = pc_; |
| 1287 | EMIT(0x0F); |
| 1288 | EMIT(0xA3); |
| 1289 | emit_operand(src, dst); |
| 1290 | } |
| 1291 | |
| 1292 | |
| 1293 | void Assembler::bts(const Operand& dst, Register src) { |
| 1294 | EnsureSpace ensure_space(this); |
| 1295 | last_pc_ = pc_; |
| 1296 | EMIT(0x0F); |
| 1297 | EMIT(0xAB); |
| 1298 | emit_operand(src, dst); |
| 1299 | } |
| 1300 | |
| 1301 | |
| 1302 | void Assembler::hlt() { |
| 1303 | EnsureSpace ensure_space(this); |
| 1304 | last_pc_ = pc_; |
| 1305 | EMIT(0xF4); |
| 1306 | } |
| 1307 | |
| 1308 | |
| 1309 | void Assembler::int3() { |
| 1310 | EnsureSpace ensure_space(this); |
| 1311 | last_pc_ = pc_; |
| 1312 | EMIT(0xCC); |
| 1313 | } |
| 1314 | |
| 1315 | |
| 1316 | void Assembler::nop() { |
| 1317 | EnsureSpace ensure_space(this); |
| 1318 | last_pc_ = pc_; |
| 1319 | EMIT(0x90); |
| 1320 | } |
| 1321 | |
| 1322 | |
| 1323 | void Assembler::rdtsc() { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 1324 | ASSERT(CpuFeatures::IsEnabled(RDTSC)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1325 | EnsureSpace ensure_space(this); |
| 1326 | last_pc_ = pc_; |
| 1327 | EMIT(0x0F); |
| 1328 | EMIT(0x31); |
| 1329 | } |
| 1330 | |
| 1331 | |
| 1332 | void Assembler::ret(int imm16) { |
| 1333 | EnsureSpace ensure_space(this); |
| 1334 | last_pc_ = pc_; |
| 1335 | ASSERT(is_uint16(imm16)); |
| 1336 | if (imm16 == 0) { |
| 1337 | EMIT(0xC3); |
| 1338 | } else { |
| 1339 | EMIT(0xC2); |
| 1340 | EMIT(imm16 & 0xFF); |
| 1341 | EMIT((imm16 >> 8) & 0xFF); |
| 1342 | } |
| 1343 | } |
| 1344 | |
| 1345 | |
| 1346 | // Labels refer to positions in the (to be) generated code. |
| 1347 | // There are bound, linked, and unused labels. |
| 1348 | // |
| 1349 | // Bound labels refer to known positions in the already |
| 1350 | // generated code. pos() is the position the label refers to. |
| 1351 | // |
| 1352 | // Linked labels refer to unknown positions in the code |
| 1353 | // to be generated; pos() is the position of the 32bit |
| 1354 | // Displacement of the last instruction using the label. |
| 1355 | |
| 1356 | |
| 1357 | void Assembler::print(Label* L) { |
| 1358 | if (L->is_unused()) { |
| 1359 | PrintF("unused label\n"); |
| 1360 | } else if (L->is_bound()) { |
| 1361 | PrintF("bound label to %d\n", L->pos()); |
| 1362 | } else if (L->is_linked()) { |
| 1363 | Label l = *L; |
| 1364 | PrintF("unbound label"); |
| 1365 | while (l.is_linked()) { |
| 1366 | Displacement disp = disp_at(&l); |
| 1367 | PrintF("@ %d ", l.pos()); |
| 1368 | disp.print(); |
| 1369 | PrintF("\n"); |
| 1370 | disp.next(&l); |
| 1371 | } |
| 1372 | } else { |
| 1373 | PrintF("label in inconsistent state (pos = %d)\n", L->pos_); |
| 1374 | } |
| 1375 | } |
| 1376 | |
| 1377 | |
| 1378 | void Assembler::bind_to(Label* L, int pos) { |
| 1379 | EnsureSpace ensure_space(this); |
| 1380 | last_pc_ = NULL; |
| 1381 | ASSERT(0 <= pos && pos <= pc_offset()); // must have a valid binding position |
| 1382 | while (L->is_linked()) { |
| 1383 | Displacement disp = disp_at(L); |
| 1384 | int fixup_pos = L->pos(); |
| 1385 | if (disp.type() == Displacement::CODE_RELATIVE) { |
| 1386 | // Relative to Code* heap object pointer. |
| 1387 | long_at_put(fixup_pos, pos + Code::kHeaderSize - kHeapObjectTag); |
| 1388 | } else { |
| 1389 | if (disp.type() == Displacement::UNCONDITIONAL_JUMP) { |
| 1390 | ASSERT(byte_at(fixup_pos - 1) == 0xE9); // jmp expected |
| 1391 | } |
| 1392 | // relative address, relative to point after address |
| 1393 | int imm32 = pos - (fixup_pos + sizeof(int32_t)); |
| 1394 | long_at_put(fixup_pos, imm32); |
| 1395 | } |
| 1396 | disp.next(L); |
| 1397 | } |
| 1398 | L->bind_to(pos); |
| 1399 | } |
| 1400 | |
| 1401 | |
| 1402 | void Assembler::link_to(Label* L, Label* appendix) { |
| 1403 | EnsureSpace ensure_space(this); |
| 1404 | last_pc_ = NULL; |
| 1405 | if (appendix->is_linked()) { |
| 1406 | if (L->is_linked()) { |
| 1407 | // append appendix to L's list |
| 1408 | Label p; |
| 1409 | Label q = *L; |
| 1410 | do { |
| 1411 | p = q; |
| 1412 | Displacement disp = disp_at(&q); |
| 1413 | disp.next(&q); |
| 1414 | } while (q.is_linked()); |
| 1415 | Displacement disp = disp_at(&p); |
| 1416 | disp.link_to(appendix); |
| 1417 | disp_at_put(&p, disp); |
| 1418 | p.Unuse(); // to avoid assertion failure in ~Label |
| 1419 | } else { |
| 1420 | // L is empty, simply use appendix |
| 1421 | *L = *appendix; |
| 1422 | } |
| 1423 | } |
| 1424 | appendix->Unuse(); // appendix should not be used anymore |
| 1425 | } |
| 1426 | |
| 1427 | |
| 1428 | void Assembler::bind(Label* L) { |
| 1429 | EnsureSpace ensure_space(this); |
| 1430 | last_pc_ = NULL; |
| 1431 | ASSERT(!L->is_bound()); // label can only be bound once |
| 1432 | bind_to(L, pc_offset()); |
| 1433 | } |
| 1434 | |
| 1435 | |
| 1436 | void Assembler::call(Label* L) { |
| 1437 | EnsureSpace ensure_space(this); |
| 1438 | last_pc_ = pc_; |
| 1439 | if (L->is_bound()) { |
| 1440 | const int long_size = 5; |
| 1441 | int offs = L->pos() - pc_offset(); |
| 1442 | ASSERT(offs <= 0); |
| 1443 | // 1110 1000 #32-bit disp |
| 1444 | EMIT(0xE8); |
| 1445 | emit(offs - long_size); |
| 1446 | } else { |
| 1447 | // 1110 1000 #32-bit disp |
| 1448 | EMIT(0xE8); |
| 1449 | emit_disp(L, Displacement::OTHER); |
| 1450 | } |
| 1451 | } |
| 1452 | |
| 1453 | |
| 1454 | void Assembler::call(byte* entry, RelocInfo::Mode rmode) { |
| 1455 | EnsureSpace ensure_space(this); |
| 1456 | last_pc_ = pc_; |
| 1457 | ASSERT(!RelocInfo::IsCodeTarget(rmode)); |
| 1458 | EMIT(0xE8); |
| 1459 | emit(entry - (pc_ + sizeof(int32_t)), rmode); |
| 1460 | } |
| 1461 | |
| 1462 | |
| 1463 | void Assembler::call(const Operand& adr) { |
| 1464 | EnsureSpace ensure_space(this); |
| 1465 | last_pc_ = pc_; |
| 1466 | EMIT(0xFF); |
| 1467 | emit_operand(edx, adr); |
| 1468 | } |
| 1469 | |
| 1470 | |
| 1471 | void Assembler::call(Handle<Code> code, RelocInfo::Mode rmode) { |
| 1472 | WriteRecordedPositions(); |
| 1473 | EnsureSpace ensure_space(this); |
| 1474 | last_pc_ = pc_; |
| 1475 | ASSERT(RelocInfo::IsCodeTarget(rmode)); |
| 1476 | EMIT(0xE8); |
| 1477 | emit(reinterpret_cast<intptr_t>(code.location()), rmode); |
| 1478 | } |
| 1479 | |
| 1480 | |
| 1481 | void Assembler::jmp(Label* L) { |
| 1482 | EnsureSpace ensure_space(this); |
| 1483 | last_pc_ = pc_; |
| 1484 | if (L->is_bound()) { |
| 1485 | const int short_size = 2; |
| 1486 | const int long_size = 5; |
| 1487 | int offs = L->pos() - pc_offset(); |
| 1488 | ASSERT(offs <= 0); |
| 1489 | if (is_int8(offs - short_size)) { |
| 1490 | // 1110 1011 #8-bit disp |
| 1491 | EMIT(0xEB); |
| 1492 | EMIT((offs - short_size) & 0xFF); |
| 1493 | } else { |
| 1494 | // 1110 1001 #32-bit disp |
| 1495 | EMIT(0xE9); |
| 1496 | emit(offs - long_size); |
| 1497 | } |
| 1498 | } else { |
| 1499 | // 1110 1001 #32-bit disp |
| 1500 | EMIT(0xE9); |
| 1501 | emit_disp(L, Displacement::UNCONDITIONAL_JUMP); |
| 1502 | } |
| 1503 | } |
| 1504 | |
| 1505 | |
| 1506 | void Assembler::jmp(byte* entry, RelocInfo::Mode rmode) { |
| 1507 | EnsureSpace ensure_space(this); |
| 1508 | last_pc_ = pc_; |
| 1509 | ASSERT(!RelocInfo::IsCodeTarget(rmode)); |
| 1510 | EMIT(0xE9); |
| 1511 | emit(entry - (pc_ + sizeof(int32_t)), rmode); |
| 1512 | } |
| 1513 | |
| 1514 | |
| 1515 | void Assembler::jmp(const Operand& adr) { |
| 1516 | EnsureSpace ensure_space(this); |
| 1517 | last_pc_ = pc_; |
| 1518 | EMIT(0xFF); |
| 1519 | emit_operand(esp, adr); |
| 1520 | } |
| 1521 | |
| 1522 | |
| 1523 | void Assembler::jmp(Handle<Code> code, RelocInfo::Mode rmode) { |
| 1524 | EnsureSpace ensure_space(this); |
| 1525 | last_pc_ = pc_; |
| 1526 | ASSERT(RelocInfo::IsCodeTarget(rmode)); |
| 1527 | EMIT(0xE9); |
| 1528 | emit(reinterpret_cast<intptr_t>(code.location()), rmode); |
| 1529 | } |
| 1530 | |
| 1531 | |
| 1532 | |
| 1533 | void Assembler::j(Condition cc, Label* L, Hint hint) { |
| 1534 | EnsureSpace ensure_space(this); |
| 1535 | last_pc_ = pc_; |
| 1536 | ASSERT(0 <= cc && cc < 16); |
| 1537 | if (FLAG_emit_branch_hints && hint != no_hint) EMIT(hint); |
| 1538 | if (L->is_bound()) { |
| 1539 | const int short_size = 2; |
| 1540 | const int long_size = 6; |
| 1541 | int offs = L->pos() - pc_offset(); |
| 1542 | ASSERT(offs <= 0); |
| 1543 | if (is_int8(offs - short_size)) { |
| 1544 | // 0111 tttn #8-bit disp |
| 1545 | EMIT(0x70 | cc); |
| 1546 | EMIT((offs - short_size) & 0xFF); |
| 1547 | } else { |
| 1548 | // 0000 1111 1000 tttn #32-bit disp |
| 1549 | EMIT(0x0F); |
| 1550 | EMIT(0x80 | cc); |
| 1551 | emit(offs - long_size); |
| 1552 | } |
| 1553 | } else { |
| 1554 | // 0000 1111 1000 tttn #32-bit disp |
| 1555 | // Note: could eliminate cond. jumps to this jump if condition |
| 1556 | // is the same however, seems to be rather unlikely case. |
| 1557 | EMIT(0x0F); |
| 1558 | EMIT(0x80 | cc); |
| 1559 | emit_disp(L, Displacement::OTHER); |
| 1560 | } |
| 1561 | } |
| 1562 | |
| 1563 | |
| 1564 | void Assembler::j(Condition cc, byte* entry, RelocInfo::Mode rmode, Hint hint) { |
| 1565 | EnsureSpace ensure_space(this); |
| 1566 | last_pc_ = pc_; |
| 1567 | ASSERT((0 <= cc) && (cc < 16)); |
| 1568 | if (FLAG_emit_branch_hints && hint != no_hint) EMIT(hint); |
| 1569 | // 0000 1111 1000 tttn #32-bit disp |
| 1570 | EMIT(0x0F); |
| 1571 | EMIT(0x80 | cc); |
| 1572 | emit(entry - (pc_ + sizeof(int32_t)), rmode); |
| 1573 | } |
| 1574 | |
| 1575 | |
| 1576 | void Assembler::j(Condition cc, Handle<Code> code, Hint hint) { |
| 1577 | EnsureSpace ensure_space(this); |
| 1578 | last_pc_ = pc_; |
| 1579 | if (FLAG_emit_branch_hints && hint != no_hint) EMIT(hint); |
| 1580 | // 0000 1111 1000 tttn #32-bit disp |
| 1581 | EMIT(0x0F); |
| 1582 | EMIT(0x80 | cc); |
| 1583 | emit(reinterpret_cast<intptr_t>(code.location()), RelocInfo::CODE_TARGET); |
| 1584 | } |
| 1585 | |
| 1586 | |
| 1587 | // FPU instructions |
| 1588 | |
| 1589 | |
| 1590 | void Assembler::fld(int i) { |
| 1591 | EnsureSpace ensure_space(this); |
| 1592 | last_pc_ = pc_; |
| 1593 | emit_farith(0xD9, 0xC0, i); |
| 1594 | } |
| 1595 | |
| 1596 | |
| 1597 | void Assembler::fld1() { |
| 1598 | EnsureSpace ensure_space(this); |
| 1599 | last_pc_ = pc_; |
| 1600 | EMIT(0xD9); |
| 1601 | EMIT(0xE8); |
| 1602 | } |
| 1603 | |
| 1604 | |
| 1605 | void Assembler::fldz() { |
| 1606 | EnsureSpace ensure_space(this); |
| 1607 | last_pc_ = pc_; |
| 1608 | EMIT(0xD9); |
| 1609 | EMIT(0xEE); |
| 1610 | } |
| 1611 | |
| 1612 | |
| 1613 | void Assembler::fld_s(const Operand& adr) { |
| 1614 | EnsureSpace ensure_space(this); |
| 1615 | last_pc_ = pc_; |
| 1616 | EMIT(0xD9); |
| 1617 | emit_operand(eax, adr); |
| 1618 | } |
| 1619 | |
| 1620 | |
| 1621 | void Assembler::fld_d(const Operand& adr) { |
| 1622 | EnsureSpace ensure_space(this); |
| 1623 | last_pc_ = pc_; |
| 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 | last_pc_ = pc_; |
| 1632 | EMIT(0xD9); |
| 1633 | emit_operand(ebx, adr); |
| 1634 | } |
| 1635 | |
| 1636 | |
| 1637 | void Assembler::fstp_d(const Operand& adr) { |
| 1638 | EnsureSpace ensure_space(this); |
| 1639 | last_pc_ = pc_; |
| 1640 | EMIT(0xDD); |
| 1641 | emit_operand(ebx, adr); |
| 1642 | } |
| 1643 | |
| 1644 | |
| 1645 | void Assembler::fild_s(const Operand& adr) { |
| 1646 | EnsureSpace ensure_space(this); |
| 1647 | last_pc_ = pc_; |
| 1648 | EMIT(0xDB); |
| 1649 | emit_operand(eax, adr); |
| 1650 | } |
| 1651 | |
| 1652 | |
| 1653 | void Assembler::fild_d(const Operand& adr) { |
| 1654 | EnsureSpace ensure_space(this); |
| 1655 | last_pc_ = pc_; |
| 1656 | EMIT(0xDF); |
| 1657 | emit_operand(ebp, adr); |
| 1658 | } |
| 1659 | |
| 1660 | |
| 1661 | void Assembler::fistp_s(const Operand& adr) { |
| 1662 | EnsureSpace ensure_space(this); |
| 1663 | last_pc_ = pc_; |
| 1664 | EMIT(0xDB); |
| 1665 | emit_operand(ebx, adr); |
| 1666 | } |
| 1667 | |
| 1668 | |
| 1669 | void Assembler::fisttp_s(const Operand& adr) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 1670 | ASSERT(CpuFeatures::IsEnabled(SSE3)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1671 | EnsureSpace ensure_space(this); |
| 1672 | last_pc_ = pc_; |
| 1673 | EMIT(0xDB); |
| 1674 | emit_operand(ecx, adr); |
| 1675 | } |
| 1676 | |
| 1677 | |
| 1678 | void Assembler::fist_s(const Operand& adr) { |
| 1679 | EnsureSpace ensure_space(this); |
| 1680 | last_pc_ = pc_; |
| 1681 | EMIT(0xDB); |
| 1682 | emit_operand(edx, adr); |
| 1683 | } |
| 1684 | |
| 1685 | |
| 1686 | void Assembler::fistp_d(const Operand& adr) { |
| 1687 | EnsureSpace ensure_space(this); |
| 1688 | last_pc_ = pc_; |
| 1689 | EMIT(0xDF); |
| 1690 | emit_operand(edi, adr); |
| 1691 | } |
| 1692 | |
| 1693 | |
| 1694 | void Assembler::fabs() { |
| 1695 | EnsureSpace ensure_space(this); |
| 1696 | last_pc_ = pc_; |
| 1697 | EMIT(0xD9); |
| 1698 | EMIT(0xE1); |
| 1699 | } |
| 1700 | |
| 1701 | |
| 1702 | void Assembler::fchs() { |
| 1703 | EnsureSpace ensure_space(this); |
| 1704 | last_pc_ = pc_; |
| 1705 | EMIT(0xD9); |
| 1706 | EMIT(0xE0); |
| 1707 | } |
| 1708 | |
| 1709 | |
| 1710 | void Assembler::fcos() { |
| 1711 | EnsureSpace ensure_space(this); |
| 1712 | last_pc_ = pc_; |
| 1713 | EMIT(0xD9); |
| 1714 | EMIT(0xFF); |
| 1715 | } |
| 1716 | |
| 1717 | |
| 1718 | void Assembler::fsin() { |
| 1719 | EnsureSpace ensure_space(this); |
| 1720 | last_pc_ = pc_; |
| 1721 | EMIT(0xD9); |
| 1722 | EMIT(0xFE); |
| 1723 | } |
| 1724 | |
| 1725 | |
| 1726 | void Assembler::fadd(int i) { |
| 1727 | EnsureSpace ensure_space(this); |
| 1728 | last_pc_ = pc_; |
| 1729 | emit_farith(0xDC, 0xC0, i); |
| 1730 | } |
| 1731 | |
| 1732 | |
| 1733 | void Assembler::fsub(int i) { |
| 1734 | EnsureSpace ensure_space(this); |
| 1735 | last_pc_ = pc_; |
| 1736 | emit_farith(0xDC, 0xE8, i); |
| 1737 | } |
| 1738 | |
| 1739 | |
| 1740 | void Assembler::fisub_s(const Operand& adr) { |
| 1741 | EnsureSpace ensure_space(this); |
| 1742 | last_pc_ = pc_; |
| 1743 | EMIT(0xDA); |
| 1744 | emit_operand(esp, adr); |
| 1745 | } |
| 1746 | |
| 1747 | |
| 1748 | void Assembler::fmul(int i) { |
| 1749 | EnsureSpace ensure_space(this); |
| 1750 | last_pc_ = pc_; |
| 1751 | emit_farith(0xDC, 0xC8, i); |
| 1752 | } |
| 1753 | |
| 1754 | |
| 1755 | void Assembler::fdiv(int i) { |
| 1756 | EnsureSpace ensure_space(this); |
| 1757 | last_pc_ = pc_; |
| 1758 | emit_farith(0xDC, 0xF8, i); |
| 1759 | } |
| 1760 | |
| 1761 | |
| 1762 | void Assembler::faddp(int i) { |
| 1763 | EnsureSpace ensure_space(this); |
| 1764 | last_pc_ = pc_; |
| 1765 | emit_farith(0xDE, 0xC0, i); |
| 1766 | } |
| 1767 | |
| 1768 | |
| 1769 | void Assembler::fsubp(int i) { |
| 1770 | EnsureSpace ensure_space(this); |
| 1771 | last_pc_ = pc_; |
| 1772 | emit_farith(0xDE, 0xE8, i); |
| 1773 | } |
| 1774 | |
| 1775 | |
| 1776 | void Assembler::fsubrp(int i) { |
| 1777 | EnsureSpace ensure_space(this); |
| 1778 | last_pc_ = pc_; |
| 1779 | emit_farith(0xDE, 0xE0, i); |
| 1780 | } |
| 1781 | |
| 1782 | |
| 1783 | void Assembler::fmulp(int i) { |
| 1784 | EnsureSpace ensure_space(this); |
| 1785 | last_pc_ = pc_; |
| 1786 | emit_farith(0xDE, 0xC8, i); |
| 1787 | } |
| 1788 | |
| 1789 | |
| 1790 | void Assembler::fdivp(int i) { |
| 1791 | EnsureSpace ensure_space(this); |
| 1792 | last_pc_ = pc_; |
| 1793 | emit_farith(0xDE, 0xF8, i); |
| 1794 | } |
| 1795 | |
| 1796 | |
| 1797 | void Assembler::fprem() { |
| 1798 | EnsureSpace ensure_space(this); |
| 1799 | last_pc_ = pc_; |
| 1800 | EMIT(0xD9); |
| 1801 | EMIT(0xF8); |
| 1802 | } |
| 1803 | |
| 1804 | |
| 1805 | void Assembler::fprem1() { |
| 1806 | EnsureSpace ensure_space(this); |
| 1807 | last_pc_ = pc_; |
| 1808 | EMIT(0xD9); |
| 1809 | EMIT(0xF5); |
| 1810 | } |
| 1811 | |
| 1812 | |
| 1813 | void Assembler::fxch(int i) { |
| 1814 | EnsureSpace ensure_space(this); |
| 1815 | last_pc_ = pc_; |
| 1816 | emit_farith(0xD9, 0xC8, i); |
| 1817 | } |
| 1818 | |
| 1819 | |
| 1820 | void Assembler::fincstp() { |
| 1821 | EnsureSpace ensure_space(this); |
| 1822 | last_pc_ = pc_; |
| 1823 | EMIT(0xD9); |
| 1824 | EMIT(0xF7); |
| 1825 | } |
| 1826 | |
| 1827 | |
| 1828 | void Assembler::ffree(int i) { |
| 1829 | EnsureSpace ensure_space(this); |
| 1830 | last_pc_ = pc_; |
| 1831 | emit_farith(0xDD, 0xC0, i); |
| 1832 | } |
| 1833 | |
| 1834 | |
| 1835 | void Assembler::ftst() { |
| 1836 | EnsureSpace ensure_space(this); |
| 1837 | last_pc_ = pc_; |
| 1838 | EMIT(0xD9); |
| 1839 | EMIT(0xE4); |
| 1840 | } |
| 1841 | |
| 1842 | |
| 1843 | void Assembler::fucomp(int i) { |
| 1844 | EnsureSpace ensure_space(this); |
| 1845 | last_pc_ = pc_; |
| 1846 | emit_farith(0xDD, 0xE8, i); |
| 1847 | } |
| 1848 | |
| 1849 | |
| 1850 | void Assembler::fucompp() { |
| 1851 | EnsureSpace ensure_space(this); |
| 1852 | last_pc_ = pc_; |
| 1853 | EMIT(0xDA); |
| 1854 | EMIT(0xE9); |
| 1855 | } |
| 1856 | |
| 1857 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1858 | void Assembler::fucomi(int i) { |
| 1859 | EnsureSpace ensure_space(this); |
| 1860 | last_pc_ = pc_; |
| 1861 | EMIT(0xDB); |
| 1862 | EMIT(0xE8 + i); |
| 1863 | } |
| 1864 | |
| 1865 | |
| 1866 | void Assembler::fucomip() { |
| 1867 | EnsureSpace ensure_space(this); |
| 1868 | last_pc_ = pc_; |
| 1869 | EMIT(0xDF); |
| 1870 | EMIT(0xE9); |
| 1871 | } |
| 1872 | |
| 1873 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1874 | void Assembler::fcompp() { |
| 1875 | EnsureSpace ensure_space(this); |
| 1876 | last_pc_ = pc_; |
| 1877 | EMIT(0xDE); |
| 1878 | EMIT(0xD9); |
| 1879 | } |
| 1880 | |
| 1881 | |
| 1882 | void Assembler::fnstsw_ax() { |
| 1883 | EnsureSpace ensure_space(this); |
| 1884 | last_pc_ = pc_; |
| 1885 | EMIT(0xDF); |
| 1886 | EMIT(0xE0); |
| 1887 | } |
| 1888 | |
| 1889 | |
| 1890 | void Assembler::fwait() { |
| 1891 | EnsureSpace ensure_space(this); |
| 1892 | last_pc_ = pc_; |
| 1893 | EMIT(0x9B); |
| 1894 | } |
| 1895 | |
| 1896 | |
| 1897 | void Assembler::frndint() { |
| 1898 | EnsureSpace ensure_space(this); |
| 1899 | last_pc_ = pc_; |
| 1900 | EMIT(0xD9); |
| 1901 | EMIT(0xFC); |
| 1902 | } |
| 1903 | |
| 1904 | |
| 1905 | void Assembler::fnclex() { |
| 1906 | EnsureSpace ensure_space(this); |
| 1907 | last_pc_ = pc_; |
| 1908 | EMIT(0xDB); |
| 1909 | EMIT(0xE2); |
| 1910 | } |
| 1911 | |
| 1912 | |
| 1913 | void Assembler::sahf() { |
| 1914 | EnsureSpace ensure_space(this); |
| 1915 | last_pc_ = pc_; |
| 1916 | EMIT(0x9E); |
| 1917 | } |
| 1918 | |
| 1919 | |
| 1920 | void Assembler::setcc(Condition cc, Register reg) { |
| 1921 | ASSERT(reg.is_byte_register()); |
| 1922 | EnsureSpace ensure_space(this); |
| 1923 | last_pc_ = pc_; |
| 1924 | EMIT(0x0F); |
| 1925 | EMIT(0x90 | cc); |
| 1926 | EMIT(0xC0 | reg.code()); |
| 1927 | } |
| 1928 | |
| 1929 | |
| 1930 | void Assembler::cvttss2si(Register dst, const Operand& src) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 1931 | ASSERT(CpuFeatures::IsEnabled(SSE2)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1932 | EnsureSpace ensure_space(this); |
| 1933 | last_pc_ = pc_; |
| 1934 | EMIT(0xF3); |
| 1935 | EMIT(0x0F); |
| 1936 | EMIT(0x2C); |
| 1937 | emit_operand(dst, src); |
| 1938 | } |
| 1939 | |
| 1940 | |
| 1941 | void Assembler::cvttsd2si(Register dst, const Operand& src) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 1942 | ASSERT(CpuFeatures::IsEnabled(SSE2)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1943 | EnsureSpace ensure_space(this); |
| 1944 | last_pc_ = pc_; |
| 1945 | EMIT(0xF2); |
| 1946 | EMIT(0x0F); |
| 1947 | EMIT(0x2C); |
| 1948 | emit_operand(dst, src); |
| 1949 | } |
| 1950 | |
| 1951 | |
| 1952 | void Assembler::cvtsi2sd(XMMRegister dst, const Operand& src) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 1953 | ASSERT(CpuFeatures::IsEnabled(SSE2)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1954 | EnsureSpace ensure_space(this); |
| 1955 | last_pc_ = pc_; |
| 1956 | EMIT(0xF2); |
| 1957 | EMIT(0x0F); |
| 1958 | EMIT(0x2A); |
| 1959 | emit_sse_operand(dst, src); |
| 1960 | } |
| 1961 | |
| 1962 | |
| 1963 | void Assembler::addsd(XMMRegister dst, XMMRegister src) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 1964 | ASSERT(CpuFeatures::IsEnabled(SSE2)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1965 | EnsureSpace ensure_space(this); |
| 1966 | last_pc_ = pc_; |
| 1967 | EMIT(0xF2); |
| 1968 | EMIT(0x0F); |
| 1969 | EMIT(0x58); |
| 1970 | emit_sse_operand(dst, src); |
| 1971 | } |
| 1972 | |
| 1973 | |
| 1974 | void Assembler::mulsd(XMMRegister dst, XMMRegister src) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 1975 | ASSERT(CpuFeatures::IsEnabled(SSE2)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1976 | EnsureSpace ensure_space(this); |
| 1977 | last_pc_ = pc_; |
| 1978 | EMIT(0xF2); |
| 1979 | EMIT(0x0F); |
| 1980 | EMIT(0x59); |
| 1981 | emit_sse_operand(dst, src); |
| 1982 | } |
| 1983 | |
| 1984 | |
| 1985 | void Assembler::subsd(XMMRegister dst, XMMRegister src) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 1986 | ASSERT(CpuFeatures::IsEnabled(SSE2)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1987 | EnsureSpace ensure_space(this); |
| 1988 | last_pc_ = pc_; |
| 1989 | EMIT(0xF2); |
| 1990 | EMIT(0x0F); |
| 1991 | EMIT(0x5C); |
| 1992 | emit_sse_operand(dst, src); |
| 1993 | } |
| 1994 | |
| 1995 | |
| 1996 | void Assembler::divsd(XMMRegister dst, XMMRegister src) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 1997 | ASSERT(CpuFeatures::IsEnabled(SSE2)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1998 | EnsureSpace ensure_space(this); |
| 1999 | last_pc_ = pc_; |
| 2000 | EMIT(0xF2); |
| 2001 | EMIT(0x0F); |
| 2002 | EMIT(0x5E); |
| 2003 | emit_sse_operand(dst, src); |
| 2004 | } |
| 2005 | |
| 2006 | |
| 2007 | void Assembler::comisd(XMMRegister dst, XMMRegister src) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 2008 | ASSERT(CpuFeatures::IsEnabled(SSE2)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2009 | EnsureSpace ensure_space(this); |
| 2010 | last_pc_ = pc_; |
| 2011 | EMIT(0x66); |
| 2012 | EMIT(0x0F); |
| 2013 | EMIT(0x2F); |
| 2014 | emit_sse_operand(dst, src); |
| 2015 | } |
| 2016 | |
| 2017 | |
| 2018 | void Assembler::movdbl(XMMRegister dst, const Operand& src) { |
| 2019 | EnsureSpace ensure_space(this); |
| 2020 | last_pc_ = pc_; |
| 2021 | movsd(dst, src); |
| 2022 | } |
| 2023 | |
| 2024 | |
| 2025 | void Assembler::movdbl(const Operand& dst, XMMRegister src) { |
| 2026 | EnsureSpace ensure_space(this); |
| 2027 | last_pc_ = pc_; |
| 2028 | movsd(dst, src); |
| 2029 | } |
| 2030 | |
| 2031 | |
| 2032 | void Assembler::movsd(const Operand& dst, XMMRegister src ) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 2033 | ASSERT(CpuFeatures::IsEnabled(SSE2)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2034 | EnsureSpace ensure_space(this); |
| 2035 | last_pc_ = pc_; |
| 2036 | EMIT(0xF2); // double |
| 2037 | EMIT(0x0F); |
| 2038 | EMIT(0x11); // store |
| 2039 | emit_sse_operand(src, dst); |
| 2040 | } |
| 2041 | |
| 2042 | |
| 2043 | void Assembler::movsd(XMMRegister dst, const Operand& src) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 2044 | ASSERT(CpuFeatures::IsEnabled(SSE2)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2045 | EnsureSpace ensure_space(this); |
| 2046 | last_pc_ = pc_; |
| 2047 | EMIT(0xF2); // double |
| 2048 | EMIT(0x0F); |
| 2049 | EMIT(0x10); // load |
| 2050 | emit_sse_operand(dst, src); |
| 2051 | } |
| 2052 | |
| 2053 | |
| 2054 | void Assembler::emit_sse_operand(XMMRegister reg, const Operand& adr) { |
| 2055 | Register ireg = { reg.code() }; |
| 2056 | emit_operand(ireg, adr); |
| 2057 | } |
| 2058 | |
| 2059 | |
| 2060 | void Assembler::emit_sse_operand(XMMRegister dst, XMMRegister src) { |
| 2061 | EMIT(0xC0 | dst.code() << 3 | src.code()); |
| 2062 | } |
| 2063 | |
| 2064 | |
| 2065 | void Assembler::Print() { |
| 2066 | Disassembler::Decode(stdout, buffer_, pc_); |
| 2067 | } |
| 2068 | |
| 2069 | |
| 2070 | void Assembler::RecordJSReturn() { |
| 2071 | WriteRecordedPositions(); |
| 2072 | EnsureSpace ensure_space(this); |
| 2073 | RecordRelocInfo(RelocInfo::JS_RETURN); |
| 2074 | } |
| 2075 | |
| 2076 | |
| 2077 | void Assembler::RecordComment(const char* msg) { |
| 2078 | if (FLAG_debug_code) { |
| 2079 | EnsureSpace ensure_space(this); |
| 2080 | RecordRelocInfo(RelocInfo::COMMENT, reinterpret_cast<intptr_t>(msg)); |
| 2081 | } |
| 2082 | } |
| 2083 | |
| 2084 | |
| 2085 | void Assembler::RecordPosition(int pos) { |
| 2086 | ASSERT(pos != RelocInfo::kNoPosition); |
| 2087 | ASSERT(pos >= 0); |
| 2088 | current_position_ = pos; |
| 2089 | } |
| 2090 | |
| 2091 | |
| 2092 | void Assembler::RecordStatementPosition(int pos) { |
| 2093 | ASSERT(pos != RelocInfo::kNoPosition); |
| 2094 | ASSERT(pos >= 0); |
| 2095 | current_statement_position_ = pos; |
| 2096 | } |
| 2097 | |
| 2098 | |
| 2099 | void Assembler::WriteRecordedPositions() { |
| 2100 | // Write the statement position if it is different from what was written last |
| 2101 | // time. |
| 2102 | if (current_statement_position_ != written_statement_position_) { |
| 2103 | EnsureSpace ensure_space(this); |
| 2104 | RecordRelocInfo(RelocInfo::STATEMENT_POSITION, current_statement_position_); |
| 2105 | written_statement_position_ = current_statement_position_; |
| 2106 | } |
| 2107 | |
| 2108 | // Write the position if it is different from what was written last time and |
| 2109 | // also different from the written statement position. |
| 2110 | if (current_position_ != written_position_ && |
| 2111 | current_position_ != written_statement_position_) { |
| 2112 | EnsureSpace ensure_space(this); |
| 2113 | RecordRelocInfo(RelocInfo::POSITION, current_position_); |
| 2114 | written_position_ = current_position_; |
| 2115 | } |
| 2116 | } |
| 2117 | |
| 2118 | |
| 2119 | void Assembler::GrowBuffer() { |
| 2120 | ASSERT(overflow()); // should not call this otherwise |
| 2121 | if (!own_buffer_) FATAL("external code buffer is too small"); |
| 2122 | |
| 2123 | // compute new buffer size |
| 2124 | CodeDesc desc; // the new buffer |
| 2125 | if (buffer_size_ < 4*KB) { |
| 2126 | desc.buffer_size = 4*KB; |
| 2127 | } else { |
| 2128 | desc.buffer_size = 2*buffer_size_; |
| 2129 | } |
| 2130 | // Some internal data structures overflow for very large buffers, |
| 2131 | // they must ensure that kMaximalBufferSize is not too large. |
| 2132 | if ((desc.buffer_size > kMaximalBufferSize) || |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 2133 | (desc.buffer_size > Heap::MaxOldGenerationSize())) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2134 | V8::FatalProcessOutOfMemory("Assembler::GrowBuffer"); |
| 2135 | } |
| 2136 | |
| 2137 | // setup new buffer |
| 2138 | desc.buffer = NewArray<byte>(desc.buffer_size); |
| 2139 | desc.instr_size = pc_offset(); |
| 2140 | desc.reloc_size = (buffer_ + buffer_size_) - (reloc_info_writer.pos()); |
| 2141 | |
| 2142 | // Clear the buffer in debug mode. Use 'int3' instructions to make |
| 2143 | // sure to get into problems if we ever run uninitialized code. |
| 2144 | #ifdef DEBUG |
| 2145 | memset(desc.buffer, 0xCC, desc.buffer_size); |
| 2146 | #endif |
| 2147 | |
| 2148 | // copy the data |
| 2149 | int pc_delta = desc.buffer - buffer_; |
| 2150 | int rc_delta = (desc.buffer + desc.buffer_size) - (buffer_ + buffer_size_); |
| 2151 | memmove(desc.buffer, buffer_, desc.instr_size); |
| 2152 | memmove(rc_delta + reloc_info_writer.pos(), |
| 2153 | reloc_info_writer.pos(), desc.reloc_size); |
| 2154 | |
| 2155 | // switch buffers |
| 2156 | if (spare_buffer_ == NULL && buffer_size_ == kMinimalBufferSize) { |
| 2157 | spare_buffer_ = buffer_; |
| 2158 | } else { |
| 2159 | DeleteArray(buffer_); |
| 2160 | } |
| 2161 | buffer_ = desc.buffer; |
| 2162 | buffer_size_ = desc.buffer_size; |
| 2163 | pc_ += pc_delta; |
| 2164 | if (last_pc_ != NULL) { |
| 2165 | last_pc_ += pc_delta; |
| 2166 | } |
| 2167 | reloc_info_writer.Reposition(reloc_info_writer.pos() + rc_delta, |
| 2168 | reloc_info_writer.last_pc() + pc_delta); |
| 2169 | |
| 2170 | // relocate runtime entries |
| 2171 | for (RelocIterator it(desc); !it.done(); it.next()) { |
| 2172 | RelocInfo::Mode rmode = it.rinfo()->rmode(); |
| 2173 | if (rmode == RelocInfo::RUNTIME_ENTRY) { |
| 2174 | int32_t* p = reinterpret_cast<int32_t*>(it.rinfo()->pc()); |
| 2175 | *p -= pc_delta; // relocate entry |
| 2176 | } else if (rmode == RelocInfo::INTERNAL_REFERENCE) { |
| 2177 | int32_t* p = reinterpret_cast<int32_t*>(it.rinfo()->pc()); |
| 2178 | if (*p != 0) { // 0 means uninitialized. |
| 2179 | *p += pc_delta; |
| 2180 | } |
| 2181 | } |
| 2182 | } |
| 2183 | |
| 2184 | ASSERT(!overflow()); |
| 2185 | } |
| 2186 | |
| 2187 | |
| 2188 | void Assembler::emit_arith_b(int op1, int op2, Register dst, int imm8) { |
| 2189 | ASSERT(is_uint8(op1) && is_uint8(op2)); // wrong opcode |
| 2190 | ASSERT(is_uint8(imm8)); |
| 2191 | ASSERT((op1 & 0x01) == 0); // should be 8bit operation |
| 2192 | EMIT(op1); |
| 2193 | EMIT(op2 | dst.code()); |
| 2194 | EMIT(imm8); |
| 2195 | } |
| 2196 | |
| 2197 | |
| 2198 | void Assembler::emit_arith(int sel, Operand dst, const Immediate& x) { |
| 2199 | ASSERT((0 <= sel) && (sel <= 7)); |
| 2200 | Register ireg = { sel }; |
| 2201 | if (x.is_int8()) { |
| 2202 | EMIT(0x83); // using a sign-extended 8-bit immediate. |
| 2203 | emit_operand(ireg, dst); |
| 2204 | EMIT(x.x_ & 0xFF); |
| 2205 | } else if (dst.is_reg(eax)) { |
| 2206 | EMIT((sel << 3) | 0x05); // short form if the destination is eax. |
| 2207 | emit(x); |
| 2208 | } else { |
| 2209 | EMIT(0x81); // using a literal 32-bit immediate. |
| 2210 | emit_operand(ireg, dst); |
| 2211 | emit(x); |
| 2212 | } |
| 2213 | } |
| 2214 | |
| 2215 | |
| 2216 | void Assembler::emit_operand(Register reg, const Operand& adr) { |
| 2217 | const unsigned length = adr.len_; |
| 2218 | ASSERT(length > 0); |
| 2219 | |
| 2220 | // Emit updated ModRM byte containing the given register. |
| 2221 | pc_[0] = (adr.buf_[0] & ~0x38) | (reg.code() << 3); |
| 2222 | |
| 2223 | // Emit the rest of the encoded operand. |
| 2224 | for (unsigned i = 1; i < length; i++) pc_[i] = adr.buf_[i]; |
| 2225 | pc_ += length; |
| 2226 | |
| 2227 | // Emit relocation information if necessary. |
| 2228 | if (length >= sizeof(int32_t) && adr.rmode_ != RelocInfo::NONE) { |
| 2229 | pc_ -= sizeof(int32_t); // pc_ must be *at* disp32 |
| 2230 | RecordRelocInfo(adr.rmode_); |
| 2231 | pc_ += sizeof(int32_t); |
| 2232 | } |
| 2233 | } |
| 2234 | |
| 2235 | |
| 2236 | void Assembler::emit_farith(int b1, int b2, int i) { |
| 2237 | ASSERT(is_uint8(b1) && is_uint8(b2)); // wrong opcode |
| 2238 | ASSERT(0 <= i && i < 8); // illegal stack offset |
| 2239 | EMIT(b1); |
| 2240 | EMIT(b2 + i); |
| 2241 | } |
| 2242 | |
| 2243 | |
| 2244 | void Assembler::dd(uint32_t data, RelocInfo::Mode reloc_info) { |
| 2245 | EnsureSpace ensure_space(this); |
| 2246 | emit(data, reloc_info); |
| 2247 | } |
| 2248 | |
| 2249 | |
| 2250 | void Assembler::RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data) { |
| 2251 | ASSERT(rmode != RelocInfo::NONE); |
| 2252 | // Don't record external references unless the heap will be serialized. |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame^] | 2253 | if (rmode == RelocInfo::EXTERNAL_REFERENCE) { |
| 2254 | #ifdef DEBUG |
| 2255 | if (!Serializer::enabled()) { |
| 2256 | Serializer::TooLateToEnableNow(); |
| 2257 | } |
| 2258 | #endif |
| 2259 | if (!Serializer::enabled() && !FLAG_debug_code) { |
| 2260 | return; |
| 2261 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2262 | } |
| 2263 | RelocInfo rinfo(pc_, rmode, data); |
| 2264 | reloc_info_writer.Write(&rinfo); |
| 2265 | } |
| 2266 | |
| 2267 | |
| 2268 | #ifdef GENERATED_CODE_COVERAGE |
| 2269 | static FILE* coverage_log = NULL; |
| 2270 | |
| 2271 | |
| 2272 | static void InitCoverageLog() { |
| 2273 | char* file_name = getenv("V8_GENERATED_CODE_COVERAGE_LOG"); |
| 2274 | if (file_name != NULL) { |
| 2275 | coverage_log = fopen(file_name, "aw+"); |
| 2276 | } |
| 2277 | } |
| 2278 | |
| 2279 | |
| 2280 | void LogGeneratedCodeCoverage(const char* file_line) { |
| 2281 | const char* return_address = (&file_line)[-1]; |
| 2282 | char* push_insn = const_cast<char*>(return_address - 12); |
| 2283 | push_insn[0] = 0xeb; // Relative branch insn. |
| 2284 | push_insn[1] = 13; // Skip over coverage insns. |
| 2285 | if (coverage_log != NULL) { |
| 2286 | fprintf(coverage_log, "%s\n", file_line); |
| 2287 | fflush(coverage_log); |
| 2288 | } |
| 2289 | } |
| 2290 | |
| 2291 | #endif |
| 2292 | |
| 2293 | } } // namespace v8::internal |