christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +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. |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 35 | // Copyright 2006-2008 the V8 project authors. All rights reserved. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 36 | |
| 37 | #include "v8.h" |
| 38 | |
| 39 | #include "disassembler.h" |
| 40 | #include "macro-assembler.h" |
| 41 | #include "serialize.h" |
| 42 | |
| 43 | namespace v8 { namespace internal { |
| 44 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 45 | // ----------------------------------------------------------------------------- |
| 46 | // Implementation of Register |
| 47 | |
| 48 | Register eax = { 0 }; |
| 49 | Register ecx = { 1 }; |
| 50 | Register edx = { 2 }; |
| 51 | Register ebx = { 3 }; |
| 52 | Register esp = { 4 }; |
| 53 | Register ebp = { 5 }; |
| 54 | Register esi = { 6 }; |
| 55 | Register edi = { 7 }; |
| 56 | Register no_reg = { -1 }; |
| 57 | |
| 58 | XMMRegister xmm0 = { 0 }; |
| 59 | XMMRegister xmm1 = { 1 }; |
| 60 | XMMRegister xmm2 = { 2 }; |
| 61 | XMMRegister xmm3 = { 3 }; |
| 62 | XMMRegister xmm4 = { 4 }; |
| 63 | XMMRegister xmm5 = { 5 }; |
| 64 | XMMRegister xmm6 = { 6 }; |
| 65 | XMMRegister xmm7 = { 7 }; |
| 66 | |
| 67 | |
| 68 | // ----------------------------------------------------------------------------- |
| 69 | // Implementation of CpuFeatures |
| 70 | |
| 71 | // Safe default is no features. |
| 72 | uint32_t CpuFeatures::supported_ = 0; |
| 73 | uint32_t CpuFeatures::enabled_ = 0; |
| 74 | |
| 75 | |
| 76 | typedef int (*F0)(); |
| 77 | |
| 78 | // The Probe method needs executable memory, so it uses Heap::CreateCode. |
| 79 | // Allocation failure is silent and leads to safe default. |
| 80 | void CpuFeatures::Probe() { |
| 81 | supported_ = 0; |
| 82 | if (Serializer::enabled()) return; // No features if we might serialize. |
| 83 | Assembler assm(NULL, 0); |
| 84 | Label done; |
| 85 | #define __ assm. |
| 86 | // Save old esp, since we are going to modify the stack. |
| 87 | __ push(ebp); |
| 88 | __ pushfd(); |
| 89 | __ push(ecx); |
| 90 | __ push(edx); |
| 91 | __ push(ebx); |
| 92 | __ mov(ebp, Operand(esp)); |
| 93 | // If we can modify bit 21 of the EFLAGS register, then CPUID is supported. |
| 94 | __ pushfd(); |
| 95 | __ pop(eax); |
| 96 | __ mov(edx, Operand(eax)); |
| 97 | __ xor_(eax, 0x200000); // Flip bit 21. |
| 98 | __ push(eax); |
| 99 | __ popfd(); |
| 100 | __ pushfd(); |
| 101 | __ pop(eax); |
| 102 | __ xor_(eax, Operand(edx)); // Different if CPUID is supported. |
| 103 | __ j(zero, &done); |
| 104 | // Invoke CPUID with 1 in eax to get feature information in edx. |
| 105 | __ mov(eax, 1); |
| 106 | // Temporarily force CPUID support, since we know it is safe here. |
| 107 | supported_ = (1 << CPUID); |
| 108 | { Scope fscope(CPUID); |
| 109 | __ cpuid(); |
| 110 | } |
| 111 | supported_ = 0; |
| 112 | // Return result in eax. |
| 113 | __ mov(eax, Operand(edx)); |
| 114 | __ bind(&done); |
| 115 | __ mov(esp, Operand(ebp)); |
| 116 | __ pop(ebx); |
| 117 | __ pop(edx); |
| 118 | __ pop(ecx); |
| 119 | __ popfd(); |
| 120 | __ pop(ebp); |
| 121 | __ ret(0); |
| 122 | #undef __ |
| 123 | CodeDesc desc; |
| 124 | assm.GetCode(&desc); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame^] | 125 | Object* code = |
| 126 | Heap::CreateCode(desc, NULL, Code::ComputeFlags(Code::STUB), NULL); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 127 | if (!code->IsCode()) return; |
| 128 | F0 f = FUNCTION_CAST<F0>(Code::cast(code)->entry()); |
| 129 | uint32_t res = f(); |
| 130 | supported_ = (res | (1 << CPUID)); |
| 131 | } |
| 132 | |
| 133 | |
| 134 | // ----------------------------------------------------------------------------- |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 135 | // Implementation of Displacement |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 136 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 137 | void Displacement::init(Label* L, Type type) { |
| 138 | ASSERT(!L->is_bound()); |
| 139 | int next = 0; |
| 140 | if (L->is_linked()) { |
| 141 | next = L->pos(); |
| 142 | ASSERT(next > 0); // Displacements must be at positions > 0 |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 143 | } |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 144 | // Ensure that we _never_ overflow the next field. |
| 145 | ASSERT(NextField::is_valid(Assembler::kMaximalBufferSize)); |
| 146 | data_ = NextField::encode(next) | TypeField::encode(type); |
| 147 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 148 | |
| 149 | |
| 150 | // ----------------------------------------------------------------------------- |
| 151 | // Implementation of RelocInfo |
| 152 | |
| 153 | |
| 154 | const int RelocInfo::kApplyMask = |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 155 | RelocInfo::kCodeTargetMask | 1 << RelocInfo::RUNTIME_ENTRY | |
| 156 | 1 << RelocInfo::JS_RETURN | 1 << RelocInfo::INTERNAL_REFERENCE; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 157 | |
| 158 | |
| 159 | void RelocInfo::patch_code(byte* instructions, int instruction_count) { |
| 160 | // Patch the code at the current address with the supplied instructions. |
| 161 | for (int i = 0; i < instruction_count; i++) { |
| 162 | *(pc_ + i) = *(instructions + i); |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | |
| 167 | // Patch the code at the current PC with a call to the target address. |
| 168 | // Additional guard int3 instructions can be added if required. |
| 169 | void RelocInfo::patch_code_with_call(Address target, int guard_bytes) { |
| 170 | // Call instruction takes up 5 bytes and int3 takes up one byte. |
| 171 | int code_size = 5 + guard_bytes; |
| 172 | |
| 173 | // Patch the code. |
| 174 | CodePatcher patcher(pc_, code_size); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 175 | patcher.masm()->call(target, RelocInfo::NONE); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 176 | |
| 177 | // Add the requested number of int3 instructions after the call. |
| 178 | for (int i = 0; i < guard_bytes; i++) { |
| 179 | patcher.masm()->int3(); |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | |
| 184 | // ----------------------------------------------------------------------------- |
| 185 | // Implementation of Operand |
| 186 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 187 | Operand::Operand(Register base, int32_t disp, RelocInfo::Mode rmode) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 188 | // [base + disp/r] |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 189 | if (disp == 0 && rmode == RelocInfo::NONE && !base.is(ebp)) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 190 | // [base] |
| 191 | set_modrm(0, base); |
| 192 | if (base.is(esp)) set_sib(times_1, esp, base); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 193 | } else if (is_int8(disp) && rmode == RelocInfo::NONE) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 194 | // [base + disp8] |
| 195 | set_modrm(1, base); |
| 196 | if (base.is(esp)) set_sib(times_1, esp, base); |
| 197 | set_disp8(disp); |
| 198 | } else { |
| 199 | // [base + disp/r] |
| 200 | set_modrm(2, base); |
| 201 | if (base.is(esp)) set_sib(times_1, esp, base); |
| 202 | set_dispr(disp, rmode); |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | |
| 207 | Operand::Operand(Register base, |
| 208 | Register index, |
| 209 | ScaleFactor scale, |
| 210 | int32_t disp, |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 211 | RelocInfo::Mode rmode) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 212 | ASSERT(!index.is(esp)); // illegal addressing mode |
| 213 | // [base + index*scale + disp/r] |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 214 | if (disp == 0 && rmode == RelocInfo::NONE && !base.is(ebp)) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 215 | // [base + index*scale] |
| 216 | set_modrm(0, esp); |
| 217 | set_sib(scale, index, base); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 218 | } else if (is_int8(disp) && rmode == RelocInfo::NONE) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 219 | // [base + index*scale + disp8] |
| 220 | set_modrm(1, esp); |
| 221 | set_sib(scale, index, base); |
| 222 | set_disp8(disp); |
| 223 | } else { |
| 224 | // [base + index*scale + disp/r] |
| 225 | set_modrm(2, esp); |
| 226 | set_sib(scale, index, base); |
| 227 | set_dispr(disp, rmode); |
| 228 | } |
| 229 | } |
| 230 | |
| 231 | |
| 232 | Operand::Operand(Register index, |
| 233 | ScaleFactor scale, |
| 234 | int32_t disp, |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 235 | RelocInfo::Mode rmode) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 236 | ASSERT(!index.is(esp)); // illegal addressing mode |
| 237 | // [index*scale + disp/r] |
| 238 | set_modrm(0, esp); |
| 239 | set_sib(scale, index, ebp); |
| 240 | set_dispr(disp, rmode); |
| 241 | } |
| 242 | |
| 243 | |
| 244 | void Operand::set_sib(ScaleFactor scale, Register index, Register base) { |
| 245 | ASSERT(len_ == 1); |
| 246 | ASSERT((scale & -4) == 0); |
| 247 | buf_[1] = scale << 6 | index.code() << 3 | base.code(); |
| 248 | len_ = 2; |
| 249 | } |
| 250 | |
| 251 | |
| 252 | void Operand::set_disp8(int8_t disp) { |
| 253 | ASSERT(len_ == 1 || len_ == 2); |
| 254 | *reinterpret_cast<int8_t*>(&buf_[len_++]) = disp; |
| 255 | } |
| 256 | |
| 257 | |
| 258 | void Operand::set_reg(Register reg) const { |
| 259 | ASSERT(len_ > 0); |
| 260 | buf_[0] = (buf_[0] & ~0x38) | static_cast<byte>(reg.code() << 3); |
| 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 | // spare_buffer_ |
| 278 | static byte* spare_buffer_ = NULL; |
| 279 | |
| 280 | Assembler::Assembler(void* buffer, int buffer_size) { |
| 281 | if (buffer == NULL) { |
| 282 | // do our own buffer management |
| 283 | if (buffer_size <= kMinimalBufferSize) { |
| 284 | buffer_size = kMinimalBufferSize; |
| 285 | |
| 286 | if (spare_buffer_ != NULL) { |
| 287 | buffer = spare_buffer_; |
| 288 | spare_buffer_ = NULL; |
| 289 | } |
| 290 | } |
| 291 | if (buffer == NULL) { |
| 292 | buffer_ = NewArray<byte>(buffer_size); |
| 293 | } else { |
| 294 | buffer_ = static_cast<byte*>(buffer); |
| 295 | } |
| 296 | buffer_size_ = buffer_size; |
| 297 | own_buffer_ = true; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 298 | } else { |
| 299 | // use externally provided buffer instead |
| 300 | ASSERT(buffer_size > 0); |
| 301 | buffer_ = static_cast<byte*>(buffer); |
| 302 | buffer_size_ = buffer_size; |
| 303 | own_buffer_ = false; |
| 304 | } |
| 305 | |
| 306 | // Clear the buffer in debug mode unless it was provided by the |
| 307 | // caller in which case we can't be sure it's okay to overwrite |
| 308 | // existing code in it; see CodePatcher::CodePatcher(...). |
| 309 | if (kDebug && own_buffer_) { |
| 310 | memset(buffer_, 0xCC, buffer_size); // int3 |
| 311 | } |
| 312 | |
| 313 | // setup buffer pointers |
| 314 | ASSERT(buffer_ != NULL); |
| 315 | pc_ = buffer_; |
| 316 | reloc_info_writer.Reposition(buffer_ + buffer_size, pc_); |
| 317 | |
| 318 | last_pc_ = NULL; |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 319 | last_position_ = RelocInfo::kNoPosition; |
| 320 | last_statement_position_ = RelocInfo::kNoPosition; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 321 | } |
| 322 | |
| 323 | |
| 324 | Assembler::~Assembler() { |
| 325 | if (own_buffer_) { |
| 326 | if (spare_buffer_ == NULL && buffer_size_ == kMinimalBufferSize) { |
| 327 | spare_buffer_ = buffer_; |
| 328 | } else { |
| 329 | DeleteArray(buffer_); |
| 330 | } |
| 331 | } |
| 332 | } |
| 333 | |
| 334 | |
| 335 | void Assembler::GetCode(CodeDesc* desc) { |
| 336 | // finalize code |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 337 | // (at this point overflow() may be true, but the gap ensures that |
| 338 | // we are still not overlapping instructions and relocation info) |
| 339 | ASSERT(pc_ <= reloc_info_writer.pos()); // no overlap |
| 340 | // setup desc |
| 341 | desc->buffer = buffer_; |
| 342 | desc->buffer_size = buffer_size_; |
| 343 | desc->instr_size = pc_offset(); |
| 344 | desc->reloc_size = (buffer_ + buffer_size_) - reloc_info_writer.pos(); |
| 345 | |
| 346 | Counters::reloc_info_size.Increment(desc->reloc_size); |
| 347 | } |
| 348 | |
| 349 | |
| 350 | void Assembler::Align(int m) { |
| 351 | ASSERT(IsPowerOf2(m)); |
| 352 | while ((pc_offset() & (m - 1)) != 0) { |
| 353 | nop(); |
| 354 | } |
| 355 | } |
| 356 | |
| 357 | |
| 358 | void Assembler::cpuid() { |
| 359 | ASSERT(CpuFeatures::IsEnabled(CpuFeatures::CPUID)); |
| 360 | EnsureSpace ensure_space(this); |
| 361 | last_pc_ = pc_; |
| 362 | EMIT(0x0F); |
| 363 | EMIT(0xA2); |
| 364 | } |
| 365 | |
| 366 | |
| 367 | void Assembler::pushad() { |
| 368 | EnsureSpace ensure_space(this); |
| 369 | last_pc_ = pc_; |
| 370 | EMIT(0x60); |
| 371 | } |
| 372 | |
| 373 | |
| 374 | void Assembler::popad() { |
| 375 | EnsureSpace ensure_space(this); |
| 376 | last_pc_ = pc_; |
| 377 | EMIT(0x61); |
| 378 | } |
| 379 | |
| 380 | |
| 381 | void Assembler::pushfd() { |
| 382 | EnsureSpace ensure_space(this); |
| 383 | last_pc_ = pc_; |
| 384 | EMIT(0x9C); |
| 385 | } |
| 386 | |
| 387 | |
| 388 | void Assembler::popfd() { |
| 389 | EnsureSpace ensure_space(this); |
| 390 | last_pc_ = pc_; |
| 391 | EMIT(0x9D); |
| 392 | } |
| 393 | |
| 394 | |
| 395 | void Assembler::push(const Immediate& x) { |
| 396 | EnsureSpace ensure_space(this); |
| 397 | last_pc_ = pc_; |
| 398 | if (x.is_int8()) { |
| 399 | EMIT(0x6a); |
| 400 | EMIT(x.x_); |
| 401 | } else { |
| 402 | EMIT(0x68); |
| 403 | emit(x); |
| 404 | } |
| 405 | } |
| 406 | |
| 407 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 408 | void Assembler::push(Register src) { |
| 409 | EnsureSpace ensure_space(this); |
| 410 | last_pc_ = pc_; |
| 411 | EMIT(0x50 | src.code()); |
| 412 | } |
| 413 | |
| 414 | |
| 415 | void Assembler::push(const Operand& src) { |
| 416 | EnsureSpace ensure_space(this); |
| 417 | last_pc_ = pc_; |
| 418 | EMIT(0xFF); |
| 419 | emit_operand(esi, src); |
| 420 | } |
| 421 | |
| 422 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame^] | 423 | void Assembler::push(Label* label, RelocInfo::Mode reloc_mode) { |
| 424 | ASSERT_NOT_NULL(label); |
| 425 | EnsureSpace ensure_space(this); |
| 426 | last_pc_ = pc_; |
| 427 | // If reloc_mode == NONE, the label is stored as buffer relative. |
| 428 | ASSERT(reloc_mode == RelocInfo::NONE); |
| 429 | if (label->is_bound()) { |
| 430 | // Index of position relative to Code Object-pointer. |
| 431 | int rel_pos = label->pos() + Code::kHeaderSize - kHeapObjectTag; |
| 432 | if (rel_pos >= 0 && rel_pos < 256) { |
| 433 | EMIT(0x6a); |
| 434 | EMIT(rel_pos); |
| 435 | } else { |
| 436 | EMIT(0x68); |
| 437 | emit(rel_pos); |
| 438 | } |
| 439 | } else { |
| 440 | EMIT(0x68); |
| 441 | emit_disp(label, Displacement::CODE_RELATIVE); |
| 442 | } |
| 443 | } |
| 444 | |
| 445 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 446 | void Assembler::pop(Register dst) { |
| 447 | ASSERT(reloc_info_writer.last_pc() != NULL); |
| 448 | if (FLAG_push_pop_elimination && (reloc_info_writer.last_pc() <= last_pc_)) { |
| 449 | // (last_pc_ != NULL) is rolled into the above check |
| 450 | // If a last_pc_ is set, we need to make sure that there has not been any |
| 451 | // relocation information generated between the last instruction and this |
| 452 | // pop instruction. |
| 453 | byte instr = last_pc_[0]; |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 454 | if ((instr & ~0x7) == 0x50) { |
| 455 | int push_reg_code = instr & 0x7; |
| 456 | if (push_reg_code == dst.code()) { |
| 457 | pc_ = last_pc_; |
| 458 | if (FLAG_print_push_pop_elimination) { |
| 459 | PrintF("%d push/pop (same reg) eliminated\n", pc_offset()); |
| 460 | } |
| 461 | } else { |
| 462 | // Convert 'push src; pop dst' to 'mov dst, src'. |
| 463 | last_pc_[0] = 0x8b; |
| 464 | Register src = { push_reg_code }; |
| 465 | EnsureSpace ensure_space(this); |
| 466 | emit_operand(dst, Operand(src)); |
| 467 | if (FLAG_print_push_pop_elimination) { |
| 468 | PrintF("%d push/pop (reg->reg) eliminated\n", pc_offset()); |
| 469 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 470 | } |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 471 | last_pc_ = NULL; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 472 | return; |
| 473 | } else if (instr == 0xff) { // push of an operand, convert to a move |
| 474 | byte op1 = last_pc_[1]; |
| 475 | // Check if the operation is really a push |
| 476 | if ((op1 & 0x38) == (6 << 3)) { |
| 477 | op1 = (op1 & ~0x38) | static_cast<byte>(dst.code() << 3); |
| 478 | last_pc_[0] = 0x8b; |
| 479 | last_pc_[1] = op1; |
| 480 | last_pc_ = NULL; |
| 481 | if (FLAG_print_push_pop_elimination) { |
| 482 | PrintF("%d push/pop (op->reg) eliminated\n", pc_offset()); |
| 483 | } |
| 484 | return; |
| 485 | } |
| 486 | } else if ((instr == 0x89) && |
| 487 | (last_pc_[1] == 0x04) && |
| 488 | (last_pc_[2] == 0x24)) { |
| 489 | // 0x71283c 396 890424 mov [esp],eax |
| 490 | // 0x71283f 399 58 pop eax |
| 491 | if (dst.is(eax)) { |
| 492 | // change to |
| 493 | // 0x710fac 216 83c404 add esp,0x4 |
| 494 | last_pc_[0] = 0x83; |
| 495 | last_pc_[1] = 0xc4; |
| 496 | last_pc_[2] = 0x04; |
| 497 | last_pc_ = NULL; |
| 498 | if (FLAG_print_push_pop_elimination) { |
| 499 | PrintF("%d push/pop (mov-pop) eliminated\n", pc_offset()); |
| 500 | } |
| 501 | return; |
| 502 | } |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 503 | } else if (instr == 0x6a && dst.is(eax)) { // push of immediate 8 bit |
| 504 | byte imm8 = last_pc_[1]; |
| 505 | if (imm8 == 0) { |
| 506 | // 6a00 push 0x0 |
| 507 | // 58 pop eax |
| 508 | last_pc_[0] = 0x31; |
| 509 | last_pc_[1] = 0xc0; |
| 510 | // change to |
| 511 | // 31c0 xor eax,eax |
| 512 | last_pc_ = NULL; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 513 | if (FLAG_print_push_pop_elimination) { |
| 514 | PrintF("%d push/pop (imm->reg) eliminated\n", pc_offset()); |
| 515 | } |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 516 | return; |
| 517 | } else { |
| 518 | // 6a00 push 0xXX |
| 519 | // 58 pop eax |
| 520 | last_pc_[0] = 0xb8; |
| 521 | EnsureSpace ensure_space(this); |
| 522 | if ((imm8 & 0x80) != 0) { |
| 523 | EMIT(0xff); |
| 524 | EMIT(0xff); |
| 525 | EMIT(0xff); |
| 526 | // change to |
| 527 | // b8XXffffff mov eax,0xffffffXX |
| 528 | } else { |
| 529 | EMIT(0x00); |
| 530 | EMIT(0x00); |
| 531 | EMIT(0x00); |
| 532 | // change to |
| 533 | // b8XX000000 mov eax,0x000000XX |
| 534 | } |
| 535 | last_pc_ = NULL; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 536 | if (FLAG_print_push_pop_elimination) { |
| 537 | PrintF("%d push/pop (imm->reg) eliminated\n", pc_offset()); |
| 538 | } |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 539 | return; |
| 540 | } |
| 541 | } else if (instr == 0x68 && dst.is(eax)) { // push of immediate 32 bit |
| 542 | // 68XXXXXXXX push 0xXXXXXXXX |
| 543 | // 58 pop eax |
| 544 | last_pc_[0] = 0xb8; |
| 545 | last_pc_ = NULL; |
| 546 | // change to |
| 547 | // b8XXXXXXXX mov eax,0xXXXXXXXX |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 548 | if (FLAG_print_push_pop_elimination) { |
| 549 | PrintF("%d push/pop (imm->reg) eliminated\n", pc_offset()); |
| 550 | } |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 551 | return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 552 | } |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 553 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 554 | // Other potential patterns for peephole: |
| 555 | // 0x712716 102 890424 mov [esp], eax |
| 556 | // 0x712719 105 8b1424 mov edx, [esp] |
| 557 | } |
| 558 | EnsureSpace ensure_space(this); |
| 559 | last_pc_ = pc_; |
| 560 | EMIT(0x58 | dst.code()); |
| 561 | } |
| 562 | |
| 563 | |
| 564 | void Assembler::pop(const Operand& dst) { |
| 565 | EnsureSpace ensure_space(this); |
| 566 | last_pc_ = pc_; |
| 567 | EMIT(0x8F); |
| 568 | emit_operand(eax, dst); |
| 569 | } |
| 570 | |
| 571 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame^] | 572 | void Assembler::enter(const Immediate& size) { |
| 573 | EnsureSpace ensure_space(this); |
| 574 | last_pc_ = pc_; |
| 575 | EMIT(0xC8); |
| 576 | emit_w(size); |
| 577 | EMIT(0); |
| 578 | } |
| 579 | |
| 580 | |
| 581 | void Assembler::leave() { |
| 582 | EnsureSpace ensure_space(this); |
| 583 | last_pc_ = pc_; |
| 584 | EMIT(0xC9); |
| 585 | } |
| 586 | |
| 587 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 588 | void Assembler::mov_b(Register dst, const Operand& src) { |
| 589 | EnsureSpace ensure_space(this); |
| 590 | last_pc_ = pc_; |
| 591 | EMIT(0x8A); |
| 592 | emit_operand(dst, src); |
| 593 | } |
| 594 | |
| 595 | |
| 596 | void Assembler::mov_b(const Operand& dst, int8_t imm8) { |
| 597 | EnsureSpace ensure_space(this); |
| 598 | last_pc_ = pc_; |
| 599 | EMIT(0xC6); |
| 600 | emit_operand(eax, dst); |
| 601 | EMIT(imm8); |
| 602 | } |
| 603 | |
| 604 | |
| 605 | void Assembler::mov_b(const Operand& dst, Register src) { |
| 606 | EnsureSpace ensure_space(this); |
| 607 | last_pc_ = pc_; |
| 608 | EMIT(0x88); |
| 609 | emit_operand(src, dst); |
| 610 | } |
| 611 | |
| 612 | |
| 613 | void Assembler::mov_w(Register dst, const Operand& src) { |
| 614 | EnsureSpace ensure_space(this); |
| 615 | last_pc_ = pc_; |
| 616 | EMIT(0x66); |
| 617 | EMIT(0x8B); |
| 618 | emit_operand(dst, src); |
| 619 | } |
| 620 | |
| 621 | |
| 622 | void Assembler::mov_w(const Operand& dst, Register src) { |
| 623 | EnsureSpace ensure_space(this); |
| 624 | last_pc_ = pc_; |
| 625 | EMIT(0x66); |
| 626 | EMIT(0x89); |
| 627 | emit_operand(src, dst); |
| 628 | } |
| 629 | |
| 630 | |
| 631 | void Assembler::mov(Register dst, int32_t imm32) { |
| 632 | EnsureSpace ensure_space(this); |
| 633 | last_pc_ = pc_; |
| 634 | EMIT(0xB8 | dst.code()); |
| 635 | emit(imm32); |
| 636 | } |
| 637 | |
| 638 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 639 | void Assembler::mov(Register dst, const Immediate& x) { |
| 640 | EnsureSpace ensure_space(this); |
| 641 | last_pc_ = pc_; |
| 642 | EMIT(0xB8 | dst.code()); |
| 643 | emit(x); |
| 644 | } |
| 645 | |
| 646 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 647 | void Assembler::mov(Register dst, Handle<Object> handle) { |
| 648 | EnsureSpace ensure_space(this); |
| 649 | last_pc_ = pc_; |
| 650 | EMIT(0xB8 | dst.code()); |
| 651 | emit(handle); |
| 652 | } |
| 653 | |
| 654 | |
| 655 | void Assembler::mov(Register dst, const Operand& src) { |
| 656 | EnsureSpace ensure_space(this); |
| 657 | last_pc_ = pc_; |
| 658 | EMIT(0x8B); |
| 659 | emit_operand(dst, src); |
| 660 | } |
| 661 | |
| 662 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 663 | void Assembler::mov(Register dst, Register src) { |
| 664 | EnsureSpace ensure_space(this); |
| 665 | last_pc_ = pc_; |
| 666 | EMIT(0x89); |
| 667 | EMIT(0xC0 | src.code() << 3 | dst.code()); |
| 668 | } |
| 669 | |
| 670 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 671 | void Assembler::mov(const Operand& dst, const Immediate& x) { |
| 672 | EnsureSpace ensure_space(this); |
| 673 | last_pc_ = pc_; |
| 674 | EMIT(0xC7); |
| 675 | emit_operand(eax, dst); |
| 676 | emit(x); |
| 677 | } |
| 678 | |
| 679 | |
| 680 | void Assembler::mov(const Operand& dst, Handle<Object> handle) { |
| 681 | EnsureSpace ensure_space(this); |
| 682 | last_pc_ = pc_; |
| 683 | EMIT(0xC7); |
| 684 | emit_operand(eax, dst); |
| 685 | emit(handle); |
| 686 | } |
| 687 | |
| 688 | |
| 689 | void Assembler::mov(const Operand& dst, Register src) { |
| 690 | EnsureSpace ensure_space(this); |
| 691 | last_pc_ = pc_; |
| 692 | EMIT(0x89); |
| 693 | emit_operand(src, dst); |
| 694 | } |
| 695 | |
| 696 | |
| 697 | void Assembler::movsx_b(Register dst, const Operand& src) { |
| 698 | EnsureSpace ensure_space(this); |
| 699 | last_pc_ = pc_; |
| 700 | EMIT(0x0F); |
| 701 | EMIT(0xBE); |
| 702 | emit_operand(dst, src); |
| 703 | } |
| 704 | |
| 705 | |
| 706 | void Assembler::movsx_w(Register dst, const Operand& src) { |
| 707 | EnsureSpace ensure_space(this); |
| 708 | last_pc_ = pc_; |
| 709 | EMIT(0x0F); |
| 710 | EMIT(0xBF); |
| 711 | emit_operand(dst, src); |
| 712 | } |
| 713 | |
| 714 | |
| 715 | void Assembler::movzx_b(Register dst, const Operand& src) { |
| 716 | EnsureSpace ensure_space(this); |
| 717 | last_pc_ = pc_; |
| 718 | EMIT(0x0F); |
| 719 | EMIT(0xB6); |
| 720 | emit_operand(dst, src); |
| 721 | } |
| 722 | |
| 723 | |
| 724 | void Assembler::movzx_w(Register dst, const Operand& src) { |
| 725 | EnsureSpace ensure_space(this); |
| 726 | last_pc_ = pc_; |
| 727 | EMIT(0x0F); |
| 728 | EMIT(0xB7); |
| 729 | emit_operand(dst, src); |
| 730 | } |
| 731 | |
| 732 | |
| 733 | void Assembler::cmov(Condition cc, Register dst, int32_t imm32) { |
| 734 | ASSERT(CpuFeatures::IsEnabled(CpuFeatures::CMOV)); |
| 735 | EnsureSpace ensure_space(this); |
| 736 | last_pc_ = pc_; |
| 737 | UNIMPLEMENTED(); |
| 738 | USE(cc); |
| 739 | USE(dst); |
| 740 | USE(imm32); |
| 741 | } |
| 742 | |
| 743 | |
| 744 | void Assembler::cmov(Condition cc, Register dst, Handle<Object> handle) { |
| 745 | ASSERT(CpuFeatures::IsEnabled(CpuFeatures::CMOV)); |
| 746 | EnsureSpace ensure_space(this); |
| 747 | last_pc_ = pc_; |
| 748 | UNIMPLEMENTED(); |
| 749 | USE(cc); |
| 750 | USE(dst); |
| 751 | USE(handle); |
| 752 | } |
| 753 | |
| 754 | |
| 755 | void Assembler::cmov(Condition cc, Register dst, const Operand& src) { |
| 756 | ASSERT(CpuFeatures::IsEnabled(CpuFeatures::CMOV)); |
| 757 | EnsureSpace ensure_space(this); |
| 758 | last_pc_ = pc_; |
| 759 | UNIMPLEMENTED(); |
| 760 | USE(cc); |
| 761 | USE(dst); |
| 762 | USE(src); |
| 763 | } |
| 764 | |
| 765 | |
| 766 | void Assembler::adc(Register dst, int32_t imm32) { |
| 767 | EnsureSpace ensure_space(this); |
| 768 | last_pc_ = pc_; |
| 769 | emit_arith(2, Operand(dst), Immediate(imm32)); |
| 770 | } |
| 771 | |
| 772 | |
| 773 | void Assembler::adc(Register dst, const Operand& src) { |
| 774 | EnsureSpace ensure_space(this); |
| 775 | last_pc_ = pc_; |
| 776 | EMIT(0x13); |
| 777 | emit_operand(dst, src); |
| 778 | } |
| 779 | |
| 780 | |
| 781 | void Assembler::add(Register dst, const Operand& src) { |
| 782 | EnsureSpace ensure_space(this); |
| 783 | last_pc_ = pc_; |
| 784 | EMIT(0x03); |
| 785 | emit_operand(dst, src); |
| 786 | } |
| 787 | |
| 788 | |
| 789 | void Assembler::add(const Operand& dst, const Immediate& x) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 790 | ASSERT(reloc_info_writer.last_pc() != NULL); |
| 791 | if (FLAG_push_pop_elimination && (reloc_info_writer.last_pc() <= last_pc_)) { |
| 792 | byte instr = last_pc_[0]; |
| 793 | if ((instr & 0xf8) == 0x50) { |
| 794 | // Last instruction was a push. Check whether this is a pop without a |
| 795 | // result. |
| 796 | if ((dst.is_reg(esp)) && |
| 797 | (x.x_ == kPointerSize) && (x.rmode_ == RelocInfo::NONE)) { |
| 798 | pc_ = last_pc_; |
| 799 | last_pc_ = NULL; |
| 800 | if (FLAG_print_push_pop_elimination) { |
| 801 | PrintF("%d push/pop(noreg) eliminated\n", pc_offset()); |
| 802 | } |
| 803 | return; |
| 804 | } |
| 805 | } |
| 806 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 807 | EnsureSpace ensure_space(this); |
| 808 | last_pc_ = pc_; |
| 809 | emit_arith(0, dst, x); |
| 810 | } |
| 811 | |
| 812 | |
| 813 | void Assembler::and_(Register dst, int32_t imm32) { |
| 814 | EnsureSpace ensure_space(this); |
| 815 | last_pc_ = pc_; |
| 816 | emit_arith(4, Operand(dst), Immediate(imm32)); |
| 817 | } |
| 818 | |
| 819 | |
| 820 | void Assembler::and_(Register dst, const Operand& src) { |
| 821 | EnsureSpace ensure_space(this); |
| 822 | last_pc_ = pc_; |
| 823 | EMIT(0x23); |
| 824 | emit_operand(dst, src); |
| 825 | } |
| 826 | |
| 827 | |
| 828 | void Assembler::and_(const Operand& dst, const Immediate& x) { |
| 829 | EnsureSpace ensure_space(this); |
| 830 | last_pc_ = pc_; |
| 831 | emit_arith(4, dst, x); |
| 832 | } |
| 833 | |
| 834 | |
| 835 | void Assembler::and_(const Operand& dst, Register src) { |
| 836 | EnsureSpace ensure_space(this); |
| 837 | last_pc_ = pc_; |
| 838 | EMIT(0x21); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 839 | emit_operand(src, dst); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 840 | } |
| 841 | |
| 842 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame^] | 843 | void Assembler::cmpb(const Operand& op, int8_t imm8) { |
| 844 | EnsureSpace ensure_space(this); |
| 845 | last_pc_ = pc_; |
| 846 | EMIT(0x80); |
| 847 | emit_operand(edi, op); // edi == 7 |
| 848 | EMIT(imm8); |
| 849 | } |
| 850 | |
| 851 | |
| 852 | void Assembler::cmpw(const Operand& op, Immediate imm16) { |
| 853 | ASSERT(imm16.is_int16()); |
| 854 | EnsureSpace ensure_space(this); |
| 855 | last_pc_ = pc_; |
| 856 | EMIT(0x66); |
| 857 | EMIT(0x81); |
| 858 | emit_operand(edi, op); |
| 859 | emit_w(imm16); |
| 860 | } |
| 861 | |
| 862 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 863 | void Assembler::cmp(Register reg, int32_t imm32) { |
| 864 | EnsureSpace ensure_space(this); |
| 865 | last_pc_ = pc_; |
| 866 | emit_arith(7, Operand(reg), Immediate(imm32)); |
| 867 | } |
| 868 | |
| 869 | |
| 870 | void Assembler::cmp(Register reg, Handle<Object> handle) { |
| 871 | EnsureSpace ensure_space(this); |
| 872 | last_pc_ = pc_; |
| 873 | emit_arith(7, Operand(reg), Immediate(handle)); |
| 874 | } |
| 875 | |
| 876 | |
| 877 | void Assembler::cmp(Register reg, const Operand& op) { |
| 878 | EnsureSpace ensure_space(this); |
| 879 | last_pc_ = pc_; |
| 880 | EMIT(0x3B); |
| 881 | emit_operand(reg, op); |
| 882 | } |
| 883 | |
| 884 | |
| 885 | void Assembler::cmp(const Operand& op, const Immediate& imm) { |
| 886 | EnsureSpace ensure_space(this); |
| 887 | last_pc_ = pc_; |
| 888 | emit_arith(7, op, imm); |
| 889 | } |
| 890 | |
| 891 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame^] | 892 | void Assembler::rep_cmpsb() { |
| 893 | EnsureSpace ensure_space(this); |
| 894 | last_pc_ = pc_; |
| 895 | EMIT(0xFC); // CLD to ensure forward operation |
| 896 | EMIT(0xF3); // REP |
| 897 | EMIT(0xA6); // CMPSB |
| 898 | } |
| 899 | |
| 900 | void Assembler::rep_cmpsw() { |
| 901 | EnsureSpace ensure_space(this); |
| 902 | last_pc_ = pc_; |
| 903 | EMIT(0xFC); // CLD to ensure forward operation |
| 904 | EMIT(0xF3); // REP |
| 905 | EMIT(0x66); // Operand size overide. |
| 906 | EMIT(0xA7); // CMPS |
| 907 | } |
| 908 | |
| 909 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 910 | void Assembler::dec_b(Register dst) { |
| 911 | EnsureSpace ensure_space(this); |
| 912 | last_pc_ = pc_; |
| 913 | EMIT(0xFE); |
| 914 | EMIT(0xC8 | dst.code()); |
| 915 | } |
| 916 | |
| 917 | |
| 918 | void Assembler::dec(Register dst) { |
| 919 | EnsureSpace ensure_space(this); |
| 920 | last_pc_ = pc_; |
| 921 | EMIT(0x48 | dst.code()); |
| 922 | } |
| 923 | |
| 924 | |
| 925 | void Assembler::dec(const Operand& dst) { |
| 926 | EnsureSpace ensure_space(this); |
| 927 | last_pc_ = pc_; |
| 928 | EMIT(0xFF); |
| 929 | emit_operand(ecx, dst); |
| 930 | } |
| 931 | |
| 932 | |
| 933 | void Assembler::cdq() { |
| 934 | EnsureSpace ensure_space(this); |
| 935 | last_pc_ = pc_; |
| 936 | EMIT(0x99); |
| 937 | } |
| 938 | |
| 939 | |
| 940 | void Assembler::idiv(Register src) { |
| 941 | EnsureSpace ensure_space(this); |
| 942 | last_pc_ = pc_; |
| 943 | EMIT(0xF7); |
| 944 | EMIT(0xF8 | src.code()); |
| 945 | } |
| 946 | |
| 947 | |
| 948 | void Assembler::imul(Register dst, const Operand& src) { |
| 949 | EnsureSpace ensure_space(this); |
| 950 | last_pc_ = pc_; |
| 951 | EMIT(0x0F); |
| 952 | EMIT(0xAF); |
| 953 | emit_operand(dst, src); |
| 954 | } |
| 955 | |
| 956 | |
| 957 | void Assembler::imul(Register dst, Register src, int32_t imm32) { |
| 958 | EnsureSpace ensure_space(this); |
| 959 | last_pc_ = pc_; |
| 960 | if (is_int8(imm32)) { |
| 961 | EMIT(0x6B); |
| 962 | EMIT(0xC0 | dst.code() << 3 | src.code()); |
| 963 | EMIT(imm32); |
| 964 | } else { |
| 965 | EMIT(0x69); |
| 966 | EMIT(0xC0 | dst.code() << 3 | src.code()); |
| 967 | emit(imm32); |
| 968 | } |
| 969 | } |
| 970 | |
| 971 | |
| 972 | void Assembler::inc(Register dst) { |
| 973 | EnsureSpace ensure_space(this); |
| 974 | last_pc_ = pc_; |
| 975 | EMIT(0x40 | dst.code()); |
| 976 | } |
| 977 | |
| 978 | |
| 979 | void Assembler::inc(const Operand& dst) { |
| 980 | EnsureSpace ensure_space(this); |
| 981 | last_pc_ = pc_; |
| 982 | EMIT(0xFF); |
| 983 | emit_operand(eax, dst); |
| 984 | } |
| 985 | |
| 986 | |
| 987 | void Assembler::lea(Register dst, const Operand& src) { |
| 988 | EnsureSpace ensure_space(this); |
| 989 | last_pc_ = pc_; |
| 990 | EMIT(0x8D); |
| 991 | emit_operand(dst, src); |
| 992 | } |
| 993 | |
| 994 | |
| 995 | void Assembler::mul(Register src) { |
| 996 | EnsureSpace ensure_space(this); |
| 997 | last_pc_ = pc_; |
| 998 | EMIT(0xF7); |
| 999 | EMIT(0xE0 | src.code()); |
| 1000 | } |
| 1001 | |
| 1002 | |
| 1003 | void Assembler::neg(Register dst) { |
| 1004 | EnsureSpace ensure_space(this); |
| 1005 | last_pc_ = pc_; |
| 1006 | EMIT(0xF7); |
| 1007 | EMIT(0xD8 | dst.code()); |
| 1008 | } |
| 1009 | |
| 1010 | |
| 1011 | void Assembler::not_(Register dst) { |
| 1012 | EnsureSpace ensure_space(this); |
| 1013 | last_pc_ = pc_; |
| 1014 | EMIT(0xF7); |
| 1015 | EMIT(0xD0 | dst.code()); |
| 1016 | } |
| 1017 | |
| 1018 | |
| 1019 | void Assembler::or_(Register dst, int32_t imm32) { |
| 1020 | EnsureSpace ensure_space(this); |
| 1021 | last_pc_ = pc_; |
| 1022 | emit_arith(1, Operand(dst), Immediate(imm32)); |
| 1023 | } |
| 1024 | |
| 1025 | |
| 1026 | void Assembler::or_(Register dst, const Operand& src) { |
| 1027 | EnsureSpace ensure_space(this); |
| 1028 | last_pc_ = pc_; |
| 1029 | EMIT(0x0B); |
| 1030 | emit_operand(dst, src); |
| 1031 | } |
| 1032 | |
| 1033 | |
| 1034 | void Assembler::or_(const Operand& dst, const Immediate& x) { |
| 1035 | EnsureSpace ensure_space(this); |
| 1036 | last_pc_ = pc_; |
| 1037 | emit_arith(1, dst, x); |
| 1038 | } |
| 1039 | |
| 1040 | |
| 1041 | void Assembler::or_(const Operand& dst, Register src) { |
| 1042 | EnsureSpace ensure_space(this); |
| 1043 | last_pc_ = pc_; |
| 1044 | EMIT(0x09); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 1045 | emit_operand(src, dst); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1046 | } |
| 1047 | |
| 1048 | |
| 1049 | void Assembler::rcl(Register dst, uint8_t imm8) { |
| 1050 | EnsureSpace ensure_space(this); |
| 1051 | last_pc_ = pc_; |
| 1052 | ASSERT(is_uint5(imm8)); // illegal shift count |
| 1053 | if (imm8 == 1) { |
| 1054 | EMIT(0xD1); |
| 1055 | EMIT(0xD0 | dst.code()); |
| 1056 | } else { |
| 1057 | EMIT(0xC1); |
| 1058 | EMIT(0xD0 | dst.code()); |
| 1059 | EMIT(imm8); |
| 1060 | } |
| 1061 | } |
| 1062 | |
| 1063 | |
| 1064 | void Assembler::sar(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(0xF8 | dst.code()); |
| 1071 | } else { |
| 1072 | EMIT(0xC1); |
| 1073 | EMIT(0xF8 | dst.code()); |
| 1074 | EMIT(imm8); |
| 1075 | } |
| 1076 | } |
| 1077 | |
| 1078 | |
| 1079 | void Assembler::sar(Register dst) { |
| 1080 | EnsureSpace ensure_space(this); |
| 1081 | last_pc_ = pc_; |
| 1082 | EMIT(0xD3); |
| 1083 | EMIT(0xF8 | dst.code()); |
| 1084 | } |
| 1085 | |
| 1086 | |
| 1087 | void Assembler::sbb(Register dst, const Operand& src) { |
| 1088 | EnsureSpace ensure_space(this); |
| 1089 | last_pc_ = pc_; |
| 1090 | EMIT(0x1B); |
| 1091 | emit_operand(dst, src); |
| 1092 | } |
| 1093 | |
| 1094 | |
| 1095 | void Assembler::shld(Register dst, const Operand& src) { |
| 1096 | EnsureSpace ensure_space(this); |
| 1097 | last_pc_ = pc_; |
| 1098 | EMIT(0x0F); |
| 1099 | EMIT(0xA5); |
| 1100 | emit_operand(dst, src); |
| 1101 | } |
| 1102 | |
| 1103 | |
| 1104 | void Assembler::shl(Register dst, uint8_t imm8) { |
| 1105 | EnsureSpace ensure_space(this); |
| 1106 | last_pc_ = pc_; |
| 1107 | ASSERT(is_uint5(imm8)); // illegal shift count |
| 1108 | if (imm8 == 1) { |
| 1109 | EMIT(0xD1); |
| 1110 | EMIT(0xE0 | dst.code()); |
| 1111 | } else { |
| 1112 | EMIT(0xC1); |
| 1113 | EMIT(0xE0 | dst.code()); |
| 1114 | EMIT(imm8); |
| 1115 | } |
| 1116 | } |
| 1117 | |
| 1118 | |
| 1119 | void Assembler::shl(Register dst) { |
| 1120 | EnsureSpace ensure_space(this); |
| 1121 | last_pc_ = pc_; |
| 1122 | EMIT(0xD3); |
| 1123 | EMIT(0xE0 | dst.code()); |
| 1124 | } |
| 1125 | |
| 1126 | |
| 1127 | void Assembler::shrd(Register dst, const Operand& src) { |
| 1128 | EnsureSpace ensure_space(this); |
| 1129 | last_pc_ = pc_; |
| 1130 | EMIT(0x0F); |
| 1131 | EMIT(0xAD); |
| 1132 | emit_operand(dst, src); |
| 1133 | } |
| 1134 | |
| 1135 | |
| 1136 | void Assembler::shr(Register dst, uint8_t imm8) { |
| 1137 | EnsureSpace ensure_space(this); |
| 1138 | last_pc_ = pc_; |
| 1139 | ASSERT(is_uint5(imm8)); // illegal shift count |
| 1140 | EMIT(0xC1); |
| 1141 | EMIT(0xE8 | dst.code()); |
| 1142 | EMIT(imm8); |
| 1143 | } |
| 1144 | |
| 1145 | |
| 1146 | void Assembler::shr(Register dst) { |
| 1147 | EnsureSpace ensure_space(this); |
| 1148 | last_pc_ = pc_; |
| 1149 | EMIT(0xD3); |
| 1150 | EMIT(0xE8 | dst.code()); |
| 1151 | } |
| 1152 | |
| 1153 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame^] | 1154 | void Assembler::shr_cl(Register dst) { |
| 1155 | EnsureSpace ensure_space(this); |
| 1156 | last_pc_ = pc_; |
| 1157 | EMIT(0xD1); |
| 1158 | EMIT(0xE8 | dst.code()); |
| 1159 | } |
| 1160 | |
| 1161 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1162 | void Assembler::sub(const Operand& dst, const Immediate& x) { |
| 1163 | EnsureSpace ensure_space(this); |
| 1164 | last_pc_ = pc_; |
| 1165 | emit_arith(5, dst, x); |
| 1166 | } |
| 1167 | |
| 1168 | |
| 1169 | void Assembler::sub(Register dst, const Operand& src) { |
| 1170 | EnsureSpace ensure_space(this); |
| 1171 | last_pc_ = pc_; |
| 1172 | EMIT(0x2B); |
| 1173 | emit_operand(dst, src); |
| 1174 | } |
| 1175 | |
| 1176 | |
| 1177 | void Assembler::sub(const Operand& dst, Register src) { |
| 1178 | EnsureSpace ensure_space(this); |
| 1179 | last_pc_ = pc_; |
| 1180 | EMIT(0x29); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 1181 | emit_operand(src, dst); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1182 | } |
| 1183 | |
| 1184 | |
| 1185 | void Assembler::test(Register reg, const Immediate& imm) { |
| 1186 | EnsureSpace ensure_space(this); |
| 1187 | last_pc_ = pc_; |
| 1188 | // Only use test against byte for registers that have a byte |
| 1189 | // variant: eax, ebx, ecx, and edx. |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1190 | if (imm.rmode_ == RelocInfo::NONE && is_uint8(imm.x_) && reg.code() < 4) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1191 | uint8_t imm8 = imm.x_; |
| 1192 | if (reg.is(eax)) { |
| 1193 | EMIT(0xA8); |
| 1194 | EMIT(imm8); |
| 1195 | } else { |
| 1196 | emit_arith_b(0xF6, 0xC0, reg, imm8); |
| 1197 | } |
| 1198 | } else { |
| 1199 | // This is not using emit_arith because test doesn't support |
| 1200 | // sign-extension of 8-bit operands. |
| 1201 | if (reg.is(eax)) { |
| 1202 | EMIT(0xA9); |
| 1203 | } else { |
| 1204 | EMIT(0xF7); |
| 1205 | EMIT(0xC0 | reg.code()); |
| 1206 | } |
| 1207 | emit(imm); |
| 1208 | } |
| 1209 | } |
| 1210 | |
| 1211 | |
| 1212 | void Assembler::test(Register reg, const Operand& op) { |
| 1213 | EnsureSpace ensure_space(this); |
| 1214 | last_pc_ = pc_; |
| 1215 | EMIT(0x85); |
| 1216 | emit_operand(reg, op); |
| 1217 | } |
| 1218 | |
| 1219 | |
| 1220 | void Assembler::test(const Operand& op, const Immediate& imm) { |
| 1221 | EnsureSpace ensure_space(this); |
| 1222 | last_pc_ = pc_; |
| 1223 | EMIT(0xF7); |
| 1224 | emit_operand(eax, op); |
| 1225 | emit(imm); |
| 1226 | } |
| 1227 | |
| 1228 | |
| 1229 | void Assembler::xor_(Register dst, int32_t imm32) { |
| 1230 | EnsureSpace ensure_space(this); |
| 1231 | last_pc_ = pc_; |
| 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 | last_pc_ = pc_; |
| 1239 | EMIT(0x33); |
| 1240 | emit_operand(dst, src); |
| 1241 | } |
| 1242 | |
| 1243 | |
| 1244 | void Assembler::xor_(const Operand& src, Register dst) { |
| 1245 | EnsureSpace ensure_space(this); |
| 1246 | last_pc_ = pc_; |
| 1247 | EMIT(0x31); |
| 1248 | emit_operand(dst, src); |
| 1249 | } |
| 1250 | |
| 1251 | |
| 1252 | void Assembler::xor_(const Operand& dst, const Immediate& x) { |
| 1253 | EnsureSpace ensure_space(this); |
| 1254 | last_pc_ = pc_; |
| 1255 | emit_arith(6, dst, x); |
| 1256 | } |
| 1257 | |
| 1258 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame^] | 1259 | void Assembler::bt(const Operand& dst, Register src) { |
| 1260 | EnsureSpace ensure_space(this); |
| 1261 | last_pc_ = pc_; |
| 1262 | EMIT(0x0F); |
| 1263 | EMIT(0xA3); |
| 1264 | emit_operand(src, dst); |
| 1265 | } |
| 1266 | |
| 1267 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1268 | void Assembler::bts(const Operand& dst, Register src) { |
| 1269 | EnsureSpace ensure_space(this); |
| 1270 | last_pc_ = pc_; |
| 1271 | EMIT(0x0F); |
| 1272 | EMIT(0xAB); |
| 1273 | emit_operand(src, dst); |
| 1274 | } |
| 1275 | |
| 1276 | |
| 1277 | void Assembler::hlt() { |
| 1278 | EnsureSpace ensure_space(this); |
| 1279 | last_pc_ = pc_; |
| 1280 | EMIT(0xF4); |
| 1281 | } |
| 1282 | |
| 1283 | |
| 1284 | void Assembler::int3() { |
| 1285 | EnsureSpace ensure_space(this); |
| 1286 | last_pc_ = pc_; |
| 1287 | EMIT(0xCC); |
| 1288 | } |
| 1289 | |
| 1290 | |
| 1291 | void Assembler::nop() { |
| 1292 | EnsureSpace ensure_space(this); |
| 1293 | last_pc_ = pc_; |
| 1294 | EMIT(0x90); |
| 1295 | } |
| 1296 | |
| 1297 | |
| 1298 | void Assembler::rdtsc() { |
| 1299 | ASSERT(CpuFeatures::IsEnabled(CpuFeatures::RDTSC)); |
| 1300 | EnsureSpace ensure_space(this); |
| 1301 | last_pc_ = pc_; |
| 1302 | EMIT(0x0F); |
| 1303 | EMIT(0x31); |
| 1304 | } |
| 1305 | |
| 1306 | |
| 1307 | void Assembler::ret(int imm16) { |
| 1308 | EnsureSpace ensure_space(this); |
| 1309 | last_pc_ = pc_; |
| 1310 | ASSERT(is_uint16(imm16)); |
| 1311 | if (imm16 == 0) { |
| 1312 | EMIT(0xC3); |
| 1313 | } else { |
| 1314 | EMIT(0xC2); |
| 1315 | EMIT(imm16 & 0xFF); |
| 1316 | EMIT((imm16 >> 8) & 0xFF); |
| 1317 | } |
| 1318 | } |
| 1319 | |
| 1320 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1321 | // Labels refer to positions in the (to be) generated code. |
| 1322 | // There are bound, linked, and unused labels. |
| 1323 | // |
| 1324 | // Bound labels refer to known positions in the already |
| 1325 | // generated code. pos() is the position the label refers to. |
| 1326 | // |
| 1327 | // Linked labels refer to unknown positions in the code |
| 1328 | // to be generated; pos() is the position of the 32bit |
| 1329 | // Displacement of the last instruction using the label. |
| 1330 | |
| 1331 | |
| 1332 | void Assembler::print(Label* L) { |
| 1333 | if (L->is_unused()) { |
| 1334 | PrintF("unused label\n"); |
| 1335 | } else if (L->is_bound()) { |
| 1336 | PrintF("bound label to %d\n", L->pos()); |
| 1337 | } else if (L->is_linked()) { |
| 1338 | Label l = *L; |
| 1339 | PrintF("unbound label"); |
| 1340 | while (l.is_linked()) { |
| 1341 | Displacement disp = disp_at(&l); |
| 1342 | PrintF("@ %d ", l.pos()); |
| 1343 | disp.print(); |
| 1344 | PrintF("\n"); |
| 1345 | disp.next(&l); |
| 1346 | } |
| 1347 | } else { |
| 1348 | PrintF("label in inconsistent state (pos = %d)\n", L->pos_); |
| 1349 | } |
| 1350 | } |
| 1351 | |
| 1352 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1353 | void Assembler::bind_to(Label* L, int pos) { |
| 1354 | EnsureSpace ensure_space(this); |
| 1355 | last_pc_ = NULL; |
| 1356 | ASSERT(0 <= pos && pos <= pc_offset()); // must have a valid binding position |
| 1357 | while (L->is_linked()) { |
| 1358 | Displacement disp = disp_at(L); |
| 1359 | int fixup_pos = L->pos(); |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame^] | 1360 | if (disp.type() == Displacement::CODE_RELATIVE) { |
| 1361 | // Relative to Code* heap object pointer. |
| 1362 | long_at_put(fixup_pos, pos + Code::kHeaderSize - kHeapObjectTag); |
| 1363 | } else { |
| 1364 | if (disp.type() == Displacement::UNCONDITIONAL_JUMP) { |
| 1365 | ASSERT(byte_at(fixup_pos - 1) == 0xE9); // jmp expected |
| 1366 | } |
| 1367 | // relative address, relative to point after address |
| 1368 | int imm32 = pos - (fixup_pos + sizeof(int32_t)); |
| 1369 | long_at_put(fixup_pos, imm32); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1370 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1371 | disp.next(L); |
| 1372 | } |
| 1373 | L->bind_to(pos); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1374 | } |
| 1375 | |
| 1376 | |
| 1377 | void Assembler::link_to(Label* L, Label* appendix) { |
| 1378 | EnsureSpace ensure_space(this); |
| 1379 | last_pc_ = NULL; |
| 1380 | if (appendix->is_linked()) { |
| 1381 | if (L->is_linked()) { |
| 1382 | // append appendix to L's list |
| 1383 | Label p; |
| 1384 | Label q = *L; |
| 1385 | do { |
| 1386 | p = q; |
| 1387 | Displacement disp = disp_at(&q); |
| 1388 | disp.next(&q); |
| 1389 | } while (q.is_linked()); |
| 1390 | Displacement disp = disp_at(&p); |
| 1391 | disp.link_to(appendix); |
| 1392 | disp_at_put(&p, disp); |
| 1393 | p.Unuse(); // to avoid assertion failure in ~Label |
| 1394 | } else { |
| 1395 | // L is empty, simply use appendix |
| 1396 | *L = *appendix; |
| 1397 | } |
| 1398 | } |
| 1399 | appendix->Unuse(); // appendix should not be used anymore |
| 1400 | } |
| 1401 | |
| 1402 | |
| 1403 | void Assembler::bind(Label* L) { |
| 1404 | EnsureSpace ensure_space(this); |
| 1405 | last_pc_ = NULL; |
| 1406 | ASSERT(!L->is_bound()); // label can only be bound once |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1407 | bind_to(L, pc_offset()); |
| 1408 | } |
| 1409 | |
| 1410 | |
| 1411 | void Assembler::call(Label* L) { |
| 1412 | EnsureSpace ensure_space(this); |
| 1413 | last_pc_ = pc_; |
| 1414 | if (L->is_bound()) { |
| 1415 | const int long_size = 5; |
| 1416 | int offs = L->pos() - pc_offset(); |
| 1417 | ASSERT(offs <= 0); |
| 1418 | // 1110 1000 #32-bit disp |
| 1419 | EMIT(0xE8); |
| 1420 | emit(offs - long_size); |
| 1421 | } else { |
| 1422 | // 1110 1000 #32-bit disp |
| 1423 | EMIT(0xE8); |
| 1424 | emit_disp(L, Displacement::OTHER); |
| 1425 | } |
| 1426 | } |
| 1427 | |
| 1428 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1429 | void Assembler::call(byte* entry, RelocInfo::Mode rmode) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1430 | EnsureSpace ensure_space(this); |
| 1431 | last_pc_ = pc_; |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1432 | ASSERT(!RelocInfo::IsCodeTarget(rmode)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1433 | EMIT(0xE8); |
| 1434 | emit(entry - (pc_ + sizeof(int32_t)), rmode); |
| 1435 | } |
| 1436 | |
| 1437 | |
| 1438 | void Assembler::call(const Operand& adr) { |
| 1439 | EnsureSpace ensure_space(this); |
| 1440 | last_pc_ = pc_; |
| 1441 | EMIT(0xFF); |
| 1442 | emit_operand(edx, adr); |
| 1443 | } |
| 1444 | |
| 1445 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1446 | void Assembler::call(Handle<Code> code, RelocInfo::Mode rmode) { |
| 1447 | WriteRecordedPositions(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1448 | EnsureSpace ensure_space(this); |
| 1449 | last_pc_ = pc_; |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1450 | ASSERT(RelocInfo::IsCodeTarget(rmode)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1451 | EMIT(0xE8); |
| 1452 | emit(reinterpret_cast<intptr_t>(code.location()), rmode); |
| 1453 | } |
| 1454 | |
| 1455 | |
| 1456 | void Assembler::jmp(Label* L) { |
| 1457 | EnsureSpace ensure_space(this); |
| 1458 | last_pc_ = pc_; |
| 1459 | if (L->is_bound()) { |
| 1460 | const int short_size = 2; |
| 1461 | const int long_size = 5; |
| 1462 | int offs = L->pos() - pc_offset(); |
| 1463 | ASSERT(offs <= 0); |
| 1464 | if (is_int8(offs - short_size)) { |
| 1465 | // 1110 1011 #8-bit disp |
| 1466 | EMIT(0xEB); |
| 1467 | EMIT((offs - short_size) & 0xFF); |
| 1468 | } else { |
| 1469 | // 1110 1001 #32-bit disp |
| 1470 | EMIT(0xE9); |
| 1471 | emit(offs - long_size); |
| 1472 | } |
| 1473 | } else { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1474 | // 1110 1001 #32-bit disp |
| 1475 | EMIT(0xE9); |
| 1476 | emit_disp(L, Displacement::UNCONDITIONAL_JUMP); |
| 1477 | } |
| 1478 | } |
| 1479 | |
| 1480 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1481 | void Assembler::jmp(byte* entry, RelocInfo::Mode rmode) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1482 | EnsureSpace ensure_space(this); |
| 1483 | last_pc_ = pc_; |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1484 | ASSERT(!RelocInfo::IsCodeTarget(rmode)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1485 | EMIT(0xE9); |
| 1486 | emit(entry - (pc_ + sizeof(int32_t)), rmode); |
| 1487 | } |
| 1488 | |
| 1489 | |
| 1490 | void Assembler::jmp(const Operand& adr) { |
| 1491 | EnsureSpace ensure_space(this); |
| 1492 | last_pc_ = pc_; |
| 1493 | EMIT(0xFF); |
| 1494 | emit_operand(esp, adr); |
| 1495 | } |
| 1496 | |
| 1497 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1498 | void Assembler::jmp(Handle<Code> code, RelocInfo::Mode rmode) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1499 | EnsureSpace ensure_space(this); |
| 1500 | last_pc_ = pc_; |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1501 | ASSERT(RelocInfo::IsCodeTarget(rmode)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1502 | EMIT(0xE9); |
| 1503 | emit(reinterpret_cast<intptr_t>(code.location()), rmode); |
| 1504 | } |
| 1505 | |
| 1506 | |
| 1507 | |
| 1508 | void Assembler::j(Condition cc, Label* L, Hint hint) { |
| 1509 | EnsureSpace ensure_space(this); |
| 1510 | last_pc_ = pc_; |
| 1511 | ASSERT(0 <= cc && cc < 16); |
| 1512 | if (FLAG_emit_branch_hints && hint != no_hint) EMIT(hint); |
| 1513 | if (L->is_bound()) { |
| 1514 | const int short_size = 2; |
| 1515 | const int long_size = 6; |
| 1516 | int offs = L->pos() - pc_offset(); |
| 1517 | ASSERT(offs <= 0); |
| 1518 | if (is_int8(offs - short_size)) { |
| 1519 | // 0111 tttn #8-bit disp |
| 1520 | EMIT(0x70 | cc); |
| 1521 | EMIT((offs - short_size) & 0xFF); |
| 1522 | } else { |
| 1523 | // 0000 1111 1000 tttn #32-bit disp |
| 1524 | EMIT(0x0F); |
| 1525 | EMIT(0x80 | cc); |
| 1526 | emit(offs - long_size); |
| 1527 | } |
| 1528 | } else { |
| 1529 | // 0000 1111 1000 tttn #32-bit disp |
| 1530 | // Note: could eliminate cond. jumps to this jump if condition |
| 1531 | // is the same however, seems to be rather unlikely case. |
| 1532 | EMIT(0x0F); |
| 1533 | EMIT(0x80 | cc); |
| 1534 | emit_disp(L, Displacement::OTHER); |
| 1535 | } |
| 1536 | } |
| 1537 | |
| 1538 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1539 | void Assembler::j(Condition cc, byte* entry, RelocInfo::Mode rmode, Hint hint) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1540 | EnsureSpace ensure_space(this); |
| 1541 | last_pc_ = pc_; |
| 1542 | ASSERT((0 <= cc) && (cc < 16)); |
| 1543 | if (FLAG_emit_branch_hints && hint != no_hint) EMIT(hint); |
| 1544 | // 0000 1111 1000 tttn #32-bit disp |
| 1545 | EMIT(0x0F); |
| 1546 | EMIT(0x80 | cc); |
| 1547 | emit(entry - (pc_ + sizeof(int32_t)), rmode); |
| 1548 | } |
| 1549 | |
| 1550 | |
| 1551 | void Assembler::j(Condition cc, Handle<Code> code, Hint hint) { |
| 1552 | EnsureSpace ensure_space(this); |
| 1553 | last_pc_ = pc_; |
| 1554 | if (FLAG_emit_branch_hints && hint != no_hint) EMIT(hint); |
| 1555 | // 0000 1111 1000 tttn #32-bit disp |
| 1556 | EMIT(0x0F); |
| 1557 | EMIT(0x80 | cc); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1558 | emit(reinterpret_cast<intptr_t>(code.location()), RelocInfo::CODE_TARGET); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1559 | } |
| 1560 | |
| 1561 | |
| 1562 | // FPU instructions |
| 1563 | |
| 1564 | |
| 1565 | void Assembler::fld(int i) { |
| 1566 | EnsureSpace ensure_space(this); |
| 1567 | last_pc_ = pc_; |
| 1568 | emit_farith(0xD9, 0xC0, i); |
| 1569 | } |
| 1570 | |
| 1571 | |
| 1572 | void Assembler::fld1() { |
| 1573 | EnsureSpace ensure_space(this); |
| 1574 | last_pc_ = pc_; |
| 1575 | EMIT(0xD9); |
| 1576 | EMIT(0xE8); |
| 1577 | } |
| 1578 | |
| 1579 | |
| 1580 | void Assembler::fldz() { |
| 1581 | EnsureSpace ensure_space(this); |
| 1582 | last_pc_ = pc_; |
| 1583 | EMIT(0xD9); |
| 1584 | EMIT(0xEE); |
| 1585 | } |
| 1586 | |
| 1587 | |
| 1588 | void Assembler::fld_s(const Operand& adr) { |
| 1589 | EnsureSpace ensure_space(this); |
| 1590 | last_pc_ = pc_; |
| 1591 | EMIT(0xD9); |
| 1592 | emit_operand(eax, adr); |
| 1593 | } |
| 1594 | |
| 1595 | |
| 1596 | void Assembler::fld_d(const Operand& adr) { |
| 1597 | EnsureSpace ensure_space(this); |
| 1598 | last_pc_ = pc_; |
| 1599 | EMIT(0xDD); |
| 1600 | emit_operand(eax, adr); |
| 1601 | } |
| 1602 | |
| 1603 | |
| 1604 | void Assembler::fstp_s(const Operand& adr) { |
| 1605 | EnsureSpace ensure_space(this); |
| 1606 | last_pc_ = pc_; |
| 1607 | EMIT(0xD9); |
| 1608 | emit_operand(ebx, adr); |
| 1609 | } |
| 1610 | |
| 1611 | |
| 1612 | void Assembler::fstp_d(const Operand& adr) { |
| 1613 | EnsureSpace ensure_space(this); |
| 1614 | last_pc_ = pc_; |
| 1615 | EMIT(0xDD); |
| 1616 | emit_operand(ebx, adr); |
| 1617 | } |
| 1618 | |
| 1619 | |
| 1620 | void Assembler::fild_s(const Operand& adr) { |
| 1621 | EnsureSpace ensure_space(this); |
| 1622 | last_pc_ = pc_; |
| 1623 | EMIT(0xDB); |
| 1624 | emit_operand(eax, adr); |
| 1625 | } |
| 1626 | |
| 1627 | |
| 1628 | void Assembler::fild_d(const Operand& adr) { |
| 1629 | EnsureSpace ensure_space(this); |
| 1630 | last_pc_ = pc_; |
| 1631 | EMIT(0xDF); |
| 1632 | emit_operand(ebp, adr); |
| 1633 | } |
| 1634 | |
| 1635 | |
| 1636 | void Assembler::fistp_s(const Operand& adr) { |
| 1637 | EnsureSpace ensure_space(this); |
| 1638 | last_pc_ = pc_; |
| 1639 | EMIT(0xDB); |
| 1640 | emit_operand(ebx, adr); |
| 1641 | } |
| 1642 | |
| 1643 | |
| 1644 | void Assembler::fist_s(const Operand& adr) { |
| 1645 | EnsureSpace ensure_space(this); |
| 1646 | last_pc_ = pc_; |
| 1647 | EMIT(0xDB); |
| 1648 | emit_operand(edx, adr); |
| 1649 | } |
| 1650 | |
| 1651 | |
| 1652 | void Assembler::fistp_d(const Operand& adr) { |
| 1653 | EnsureSpace ensure_space(this); |
| 1654 | last_pc_ = pc_; |
| 1655 | EMIT(0xDF); |
| 1656 | emit_operand(edi, adr); |
| 1657 | } |
| 1658 | |
| 1659 | |
| 1660 | void Assembler::fabs() { |
| 1661 | EnsureSpace ensure_space(this); |
| 1662 | last_pc_ = pc_; |
| 1663 | EMIT(0xD9); |
| 1664 | EMIT(0xE1); |
| 1665 | } |
| 1666 | |
| 1667 | |
| 1668 | void Assembler::fchs() { |
| 1669 | EnsureSpace ensure_space(this); |
| 1670 | last_pc_ = pc_; |
| 1671 | EMIT(0xD9); |
| 1672 | EMIT(0xE0); |
| 1673 | } |
| 1674 | |
| 1675 | |
| 1676 | void Assembler::fadd(int i) { |
| 1677 | EnsureSpace ensure_space(this); |
| 1678 | last_pc_ = pc_; |
| 1679 | emit_farith(0xDC, 0xC0, i); |
| 1680 | } |
| 1681 | |
| 1682 | |
| 1683 | void Assembler::fsub(int i) { |
| 1684 | EnsureSpace ensure_space(this); |
| 1685 | last_pc_ = pc_; |
| 1686 | emit_farith(0xDC, 0xE8, i); |
| 1687 | } |
| 1688 | |
| 1689 | |
| 1690 | void Assembler::fisub_s(const Operand& adr) { |
| 1691 | EnsureSpace ensure_space(this); |
| 1692 | last_pc_ = pc_; |
| 1693 | EMIT(0xDA); |
| 1694 | emit_operand(esp, adr); |
| 1695 | } |
| 1696 | |
| 1697 | |
| 1698 | void Assembler::fmul(int i) { |
| 1699 | EnsureSpace ensure_space(this); |
| 1700 | last_pc_ = pc_; |
| 1701 | emit_farith(0xDC, 0xC8, i); |
| 1702 | } |
| 1703 | |
| 1704 | |
| 1705 | void Assembler::fdiv(int i) { |
| 1706 | EnsureSpace ensure_space(this); |
| 1707 | last_pc_ = pc_; |
| 1708 | emit_farith(0xDC, 0xF8, i); |
| 1709 | } |
| 1710 | |
| 1711 | |
| 1712 | void Assembler::faddp(int i) { |
| 1713 | EnsureSpace ensure_space(this); |
| 1714 | last_pc_ = pc_; |
| 1715 | emit_farith(0xDE, 0xC0, i); |
| 1716 | } |
| 1717 | |
| 1718 | |
| 1719 | void Assembler::fsubp(int i) { |
| 1720 | EnsureSpace ensure_space(this); |
| 1721 | last_pc_ = pc_; |
| 1722 | emit_farith(0xDE, 0xE8, i); |
| 1723 | } |
| 1724 | |
| 1725 | |
| 1726 | void Assembler::fsubrp(int i) { |
| 1727 | EnsureSpace ensure_space(this); |
| 1728 | last_pc_ = pc_; |
| 1729 | emit_farith(0xDE, 0xE0, i); |
| 1730 | } |
| 1731 | |
| 1732 | |
| 1733 | void Assembler::fmulp(int i) { |
| 1734 | EnsureSpace ensure_space(this); |
| 1735 | last_pc_ = pc_; |
| 1736 | emit_farith(0xDE, 0xC8, i); |
| 1737 | } |
| 1738 | |
| 1739 | |
| 1740 | void Assembler::fdivp(int i) { |
| 1741 | EnsureSpace ensure_space(this); |
| 1742 | last_pc_ = pc_; |
| 1743 | emit_farith(0xDE, 0xF8, i); |
| 1744 | } |
| 1745 | |
| 1746 | |
| 1747 | void Assembler::fprem() { |
| 1748 | EnsureSpace ensure_space(this); |
| 1749 | last_pc_ = pc_; |
| 1750 | EMIT(0xD9); |
| 1751 | EMIT(0xF8); |
| 1752 | } |
| 1753 | |
| 1754 | |
| 1755 | void Assembler::fprem1() { |
| 1756 | EnsureSpace ensure_space(this); |
| 1757 | last_pc_ = pc_; |
| 1758 | EMIT(0xD9); |
| 1759 | EMIT(0xF5); |
| 1760 | } |
| 1761 | |
| 1762 | |
| 1763 | void Assembler::fxch(int i) { |
| 1764 | EnsureSpace ensure_space(this); |
| 1765 | last_pc_ = pc_; |
| 1766 | emit_farith(0xD9, 0xC8, i); |
| 1767 | } |
| 1768 | |
| 1769 | |
| 1770 | void Assembler::fincstp() { |
| 1771 | EnsureSpace ensure_space(this); |
| 1772 | last_pc_ = pc_; |
| 1773 | EMIT(0xD9); |
| 1774 | EMIT(0xF7); |
| 1775 | } |
| 1776 | |
| 1777 | |
| 1778 | void Assembler::ffree(int i) { |
| 1779 | EnsureSpace ensure_space(this); |
| 1780 | last_pc_ = pc_; |
| 1781 | emit_farith(0xDD, 0xC0, i); |
| 1782 | } |
| 1783 | |
| 1784 | |
| 1785 | void Assembler::ftst() { |
| 1786 | EnsureSpace ensure_space(this); |
| 1787 | last_pc_ = pc_; |
| 1788 | EMIT(0xD9); |
| 1789 | EMIT(0xE4); |
| 1790 | } |
| 1791 | |
| 1792 | |
| 1793 | void Assembler::fucomp(int i) { |
| 1794 | EnsureSpace ensure_space(this); |
| 1795 | last_pc_ = pc_; |
| 1796 | emit_farith(0xDD, 0xE8, i); |
| 1797 | } |
| 1798 | |
| 1799 | |
| 1800 | void Assembler::fucompp() { |
| 1801 | EnsureSpace ensure_space(this); |
| 1802 | last_pc_ = pc_; |
| 1803 | EMIT(0xDA); |
| 1804 | EMIT(0xE9); |
| 1805 | } |
| 1806 | |
| 1807 | |
| 1808 | void Assembler::fcompp() { |
| 1809 | EnsureSpace ensure_space(this); |
| 1810 | last_pc_ = pc_; |
| 1811 | EMIT(0xDE); |
| 1812 | EMIT(0xD9); |
| 1813 | } |
| 1814 | |
| 1815 | |
| 1816 | void Assembler::fnstsw_ax() { |
| 1817 | EnsureSpace ensure_space(this); |
| 1818 | last_pc_ = pc_; |
| 1819 | EMIT(0xdF); |
| 1820 | EMIT(0xE0); |
| 1821 | } |
| 1822 | |
| 1823 | |
| 1824 | void Assembler::fwait() { |
| 1825 | EnsureSpace ensure_space(this); |
| 1826 | last_pc_ = pc_; |
| 1827 | EMIT(0x9B); |
| 1828 | } |
| 1829 | |
| 1830 | |
| 1831 | void Assembler::frndint() { |
| 1832 | EnsureSpace ensure_space(this); |
| 1833 | last_pc_ = pc_; |
| 1834 | EMIT(0xD9); |
| 1835 | EMIT(0xFC); |
| 1836 | } |
| 1837 | |
| 1838 | |
| 1839 | void Assembler::sahf() { |
| 1840 | EnsureSpace ensure_space(this); |
| 1841 | last_pc_ = pc_; |
| 1842 | EMIT(0x9E); |
| 1843 | } |
| 1844 | |
| 1845 | |
| 1846 | void Assembler::cvttss2si(Register dst, const Operand& src) { |
| 1847 | ASSERT(CpuFeatures::IsEnabled(CpuFeatures::SSE2)); |
| 1848 | EnsureSpace ensure_space(this); |
| 1849 | last_pc_ = pc_; |
| 1850 | EMIT(0xF3); |
| 1851 | EMIT(0x0F); |
| 1852 | EMIT(0x2C); |
| 1853 | emit_operand(dst, src); |
| 1854 | } |
| 1855 | |
| 1856 | |
| 1857 | void Assembler::cvttsd2si(Register dst, const Operand& src) { |
| 1858 | ASSERT(CpuFeatures::IsEnabled(CpuFeatures::SSE2)); |
| 1859 | EnsureSpace ensure_space(this); |
| 1860 | last_pc_ = pc_; |
| 1861 | EMIT(0xF2); |
| 1862 | EMIT(0x0F); |
| 1863 | EMIT(0x2C); |
| 1864 | emit_operand(dst, src); |
| 1865 | } |
| 1866 | |
| 1867 | |
| 1868 | void Assembler::cvtsi2sd(XMMRegister dst, const Operand& src) { |
| 1869 | ASSERT(CpuFeatures::IsEnabled(CpuFeatures::SSE2)); |
| 1870 | EnsureSpace ensure_space(this); |
| 1871 | last_pc_ = pc_; |
| 1872 | EMIT(0xF2); |
| 1873 | EMIT(0x0F); |
| 1874 | EMIT(0x2A); |
| 1875 | emit_sse_operand(dst, src); |
| 1876 | } |
| 1877 | |
| 1878 | |
| 1879 | void Assembler::addsd(XMMRegister dst, XMMRegister src) { |
| 1880 | ASSERT(CpuFeatures::IsEnabled(CpuFeatures::SSE2)); |
| 1881 | EnsureSpace ensure_space(this); |
| 1882 | last_pc_ = pc_; |
| 1883 | EMIT(0xF2); |
| 1884 | EMIT(0x0F); |
| 1885 | EMIT(0x58); |
| 1886 | emit_sse_operand(dst, src); |
| 1887 | } |
| 1888 | |
| 1889 | |
| 1890 | void Assembler::mulsd(XMMRegister dst, XMMRegister src) { |
| 1891 | ASSERT(CpuFeatures::IsEnabled(CpuFeatures::SSE2)); |
| 1892 | EnsureSpace ensure_space(this); |
| 1893 | last_pc_ = pc_; |
| 1894 | EMIT(0xF2); |
| 1895 | EMIT(0x0F); |
| 1896 | EMIT(0x59); |
| 1897 | emit_sse_operand(dst, src); |
| 1898 | } |
| 1899 | |
| 1900 | |
| 1901 | void Assembler::subsd(XMMRegister dst, XMMRegister src) { |
| 1902 | ASSERT(CpuFeatures::IsEnabled(CpuFeatures::SSE2)); |
| 1903 | EnsureSpace ensure_space(this); |
| 1904 | last_pc_ = pc_; |
| 1905 | EMIT(0xF2); |
| 1906 | EMIT(0x0F); |
| 1907 | EMIT(0x5C); |
| 1908 | emit_sse_operand(dst, src); |
| 1909 | } |
| 1910 | |
| 1911 | |
| 1912 | void Assembler::divsd(XMMRegister dst, XMMRegister src) { |
| 1913 | ASSERT(CpuFeatures::IsEnabled(CpuFeatures::SSE2)); |
| 1914 | EnsureSpace ensure_space(this); |
| 1915 | last_pc_ = pc_; |
| 1916 | EMIT(0xF2); |
| 1917 | EMIT(0x0F); |
| 1918 | EMIT(0x5E); |
| 1919 | emit_sse_operand(dst, src); |
| 1920 | } |
| 1921 | |
| 1922 | |
| 1923 | void Assembler::movdbl(XMMRegister dst, const Operand& src) { |
| 1924 | EnsureSpace ensure_space(this); |
| 1925 | last_pc_ = pc_; |
| 1926 | movsd(dst, src); |
| 1927 | } |
| 1928 | |
| 1929 | |
| 1930 | void Assembler::movdbl(const Operand& dst, XMMRegister src) { |
| 1931 | EnsureSpace ensure_space(this); |
| 1932 | last_pc_ = pc_; |
| 1933 | movsd(dst, src); |
| 1934 | } |
| 1935 | |
| 1936 | |
| 1937 | void Assembler::movsd(const Operand& dst, XMMRegister src ) { |
| 1938 | ASSERT(CpuFeatures::IsEnabled(CpuFeatures::SSE2)); |
| 1939 | EnsureSpace ensure_space(this); |
| 1940 | last_pc_ = pc_; |
| 1941 | EMIT(0xF2); // double |
| 1942 | EMIT(0x0F); |
| 1943 | EMIT(0x11); // store |
| 1944 | emit_sse_operand(src, dst); |
| 1945 | } |
| 1946 | |
| 1947 | |
| 1948 | void Assembler::movsd(XMMRegister dst, const Operand& src) { |
| 1949 | ASSERT(CpuFeatures::IsEnabled(CpuFeatures::SSE2)); |
| 1950 | EnsureSpace ensure_space(this); |
| 1951 | last_pc_ = pc_; |
| 1952 | EMIT(0xF2); // double |
| 1953 | EMIT(0x0F); |
| 1954 | EMIT(0x10); // load |
| 1955 | emit_sse_operand(dst, src); |
| 1956 | } |
| 1957 | |
| 1958 | |
| 1959 | void Assembler::emit_sse_operand(XMMRegister reg, const Operand& adr) { |
| 1960 | Register ireg = { reg.code() }; |
| 1961 | emit_operand(ireg, adr); |
| 1962 | } |
| 1963 | |
| 1964 | |
| 1965 | void Assembler::emit_sse_operand(XMMRegister dst, XMMRegister src) { |
| 1966 | EMIT(0xC0 | dst.code() << 3 | src.code()); |
| 1967 | } |
| 1968 | |
| 1969 | |
| 1970 | void Assembler::Print() { |
| 1971 | Disassembler::Decode(stdout, buffer_, pc_); |
| 1972 | } |
| 1973 | |
| 1974 | |
| 1975 | void Assembler::RecordJSReturn() { |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1976 | WriteRecordedPositions(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1977 | EnsureSpace ensure_space(this); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1978 | RecordRelocInfo(RelocInfo::JS_RETURN); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1979 | } |
| 1980 | |
| 1981 | |
| 1982 | void Assembler::RecordComment(const char* msg) { |
| 1983 | if (FLAG_debug_code) { |
| 1984 | EnsureSpace ensure_space(this); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1985 | RecordRelocInfo(RelocInfo::COMMENT, reinterpret_cast<intptr_t>(msg)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1986 | } |
| 1987 | } |
| 1988 | |
| 1989 | |
| 1990 | void Assembler::RecordPosition(int pos) { |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1991 | if (pos == RelocInfo::kNoPosition) return; |
| 1992 | ASSERT(pos >= 0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1993 | last_position_ = pos; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1994 | } |
| 1995 | |
| 1996 | |
| 1997 | void Assembler::RecordStatementPosition(int pos) { |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1998 | if (pos == RelocInfo::kNoPosition) return; |
| 1999 | ASSERT(pos >= 0); |
| 2000 | last_statement_position_ = pos; |
| 2001 | } |
| 2002 | |
| 2003 | |
| 2004 | void Assembler::WriteRecordedPositions() { |
| 2005 | if (last_statement_position_ != RelocInfo::kNoPosition) { |
| 2006 | EnsureSpace ensure_space(this); |
| 2007 | RecordRelocInfo(RelocInfo::STATEMENT_POSITION, last_statement_position_); |
| 2008 | } |
| 2009 | if ((last_position_ != RelocInfo::kNoPosition) && |
| 2010 | (last_position_ != last_statement_position_)) { |
| 2011 | EnsureSpace ensure_space(this); |
| 2012 | RecordRelocInfo(RelocInfo::POSITION, last_position_); |
| 2013 | } |
| 2014 | last_statement_position_ = RelocInfo::kNoPosition; |
| 2015 | last_position_ = RelocInfo::kNoPosition; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2016 | } |
| 2017 | |
| 2018 | |
| 2019 | void Assembler::GrowBuffer() { |
| 2020 | ASSERT(overflow()); // should not call this otherwise |
| 2021 | if (!own_buffer_) FATAL("external code buffer is too small"); |
| 2022 | |
| 2023 | // compute new buffer size |
| 2024 | CodeDesc desc; // the new buffer |
| 2025 | if (buffer_size_ < 4*KB) { |
| 2026 | desc.buffer_size = 4*KB; |
| 2027 | } else { |
| 2028 | desc.buffer_size = 2*buffer_size_; |
| 2029 | } |
| 2030 | // Some internal data structures overflow for very large buffers, |
| 2031 | // they must ensure that kMaximalBufferSize is not too large. |
| 2032 | if ((desc.buffer_size > kMaximalBufferSize) || |
| 2033 | (desc.buffer_size > Heap::OldGenerationSize())) { |
| 2034 | V8::FatalProcessOutOfMemory("Assembler::GrowBuffer"); |
| 2035 | } |
| 2036 | |
| 2037 | // setup new buffer |
| 2038 | desc.buffer = NewArray<byte>(desc.buffer_size); |
| 2039 | desc.instr_size = pc_offset(); |
| 2040 | desc.reloc_size = (buffer_ + buffer_size_) - (reloc_info_writer.pos()); |
| 2041 | |
| 2042 | // Clear the buffer in debug mode. Use 'int3' instructions to make |
| 2043 | // sure to get into problems if we ever run uninitialized code. |
| 2044 | if (kDebug) { |
| 2045 | memset(desc.buffer, 0xCC, desc.buffer_size); |
| 2046 | } |
| 2047 | |
| 2048 | // copy the data |
| 2049 | int pc_delta = desc.buffer - buffer_; |
| 2050 | int rc_delta = (desc.buffer + desc.buffer_size) - (buffer_ + buffer_size_); |
| 2051 | memmove(desc.buffer, buffer_, desc.instr_size); |
| 2052 | memmove(rc_delta + reloc_info_writer.pos(), |
| 2053 | reloc_info_writer.pos(), desc.reloc_size); |
| 2054 | |
| 2055 | // switch buffers |
| 2056 | if (spare_buffer_ == NULL && buffer_size_ == kMinimalBufferSize) { |
| 2057 | spare_buffer_ = buffer_; |
| 2058 | } else { |
| 2059 | DeleteArray(buffer_); |
| 2060 | } |
| 2061 | buffer_ = desc.buffer; |
| 2062 | buffer_size_ = desc.buffer_size; |
| 2063 | pc_ += pc_delta; |
| 2064 | if (last_pc_ != NULL) { |
| 2065 | last_pc_ += pc_delta; |
| 2066 | } |
| 2067 | reloc_info_writer.Reposition(reloc_info_writer.pos() + rc_delta, |
| 2068 | reloc_info_writer.last_pc() + pc_delta); |
| 2069 | |
| 2070 | // relocate runtime entries |
| 2071 | for (RelocIterator it(desc); !it.done(); it.next()) { |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 2072 | RelocInfo::Mode rmode = it.rinfo()->rmode(); |
| 2073 | if (rmode == RelocInfo::RUNTIME_ENTRY) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2074 | int32_t* p = reinterpret_cast<int32_t*>(it.rinfo()->pc()); |
| 2075 | *p -= pc_delta; // relocate entry |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 2076 | } else if (rmode == RelocInfo::INTERNAL_REFERENCE) { |
| 2077 | int32_t* p = reinterpret_cast<int32_t*>(it.rinfo()->pc()); |
| 2078 | if (*p != 0) { // 0 means uninitialized. |
| 2079 | *p += pc_delta; |
| 2080 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2081 | } |
| 2082 | } |
| 2083 | |
| 2084 | ASSERT(!overflow()); |
| 2085 | } |
| 2086 | |
| 2087 | |
| 2088 | void Assembler::emit_arith_b(int op1, int op2, Register dst, int imm8) { |
| 2089 | ASSERT(is_uint8(op1) && is_uint8(op2)); // wrong opcode |
| 2090 | ASSERT(is_uint8(imm8)); |
| 2091 | ASSERT((op1 & 0x01) == 0); // should be 8bit operation |
| 2092 | EMIT(op1); |
| 2093 | EMIT(op2 | dst.code()); |
| 2094 | EMIT(imm8); |
| 2095 | } |
| 2096 | |
| 2097 | |
| 2098 | void Assembler::emit_arith(int sel, Operand dst, const Immediate& x) { |
| 2099 | ASSERT((0 <= sel) && (sel <= 7)); |
| 2100 | Register ireg = { sel }; |
| 2101 | if (x.is_int8()) { |
| 2102 | EMIT(0x83); // using a sign-extended 8-bit immediate. |
| 2103 | emit_operand(ireg, dst); |
| 2104 | EMIT(x.x_ & 0xFF); |
| 2105 | } else if (dst.is_reg(eax)) { |
| 2106 | EMIT((sel << 3) | 0x05); // short form if the destination is eax. |
| 2107 | emit(x); |
| 2108 | } else { |
| 2109 | EMIT(0x81); // using a literal 32-bit immediate. |
| 2110 | emit_operand(ireg, dst); |
| 2111 | emit(x); |
| 2112 | } |
| 2113 | } |
| 2114 | |
| 2115 | |
| 2116 | void Assembler::emit_operand(Register reg, const Operand& adr) { |
| 2117 | adr.set_reg(reg); |
| 2118 | memmove(pc_, adr.buf_, adr.len_); |
| 2119 | pc_ += adr.len_; |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 2120 | if (adr.len_ >= sizeof(int32_t) && adr.rmode_ != RelocInfo::NONE) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2121 | pc_ -= sizeof(int32_t); // pc_ must be *at* disp32 |
| 2122 | RecordRelocInfo(adr.rmode_); |
| 2123 | pc_ += sizeof(int32_t); |
| 2124 | } |
| 2125 | } |
| 2126 | |
| 2127 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2128 | void Assembler::emit_farith(int b1, int b2, int i) { |
| 2129 | ASSERT(is_uint8(b1) && is_uint8(b2)); // wrong opcode |
| 2130 | ASSERT(0 <= i && i < 8); // illegal stack offset |
| 2131 | EMIT(b1); |
| 2132 | EMIT(b2 + i); |
| 2133 | } |
| 2134 | |
| 2135 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 2136 | void Assembler::dd(uint32_t data, RelocInfo::Mode reloc_info) { |
| 2137 | EnsureSpace ensure_space(this); |
| 2138 | emit(data, reloc_info); |
| 2139 | } |
| 2140 | |
| 2141 | |
| 2142 | void Assembler::RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data) { |
| 2143 | ASSERT(rmode != RelocInfo::NONE); |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 2144 | // Don't record external references unless the heap will be serialized. |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 2145 | if (rmode == RelocInfo::EXTERNAL_REFERENCE && |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 2146 | !Serializer::enabled() && |
| 2147 | !FLAG_debug_code) { |
| 2148 | return; |
| 2149 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2150 | RelocInfo rinfo(pc_, rmode, data); |
| 2151 | reloc_info_writer.Write(&rinfo); |
| 2152 | } |
| 2153 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2154 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 2155 | void Assembler::WriteInternalReference(int position, const Label& bound_label) { |
| 2156 | ASSERT(bound_label.is_bound()); |
| 2157 | ASSERT(0 <= position); |
| 2158 | ASSERT(position + static_cast<int>(sizeof(uint32_t)) <= pc_offset()); |
| 2159 | ASSERT(long_at(position) == 0); // only initialize once! |
| 2160 | |
| 2161 | uint32_t label_loc = reinterpret_cast<uint32_t>(addr_at(bound_label.pos())); |
| 2162 | long_at_put(position, label_loc); |
| 2163 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2164 | |
| 2165 | } } // namespace v8::internal |