Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1 | // Copyright 2009 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #include "v8.h" |
| 29 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 30 | #if defined(V8_TARGET_ARCH_X64) |
| 31 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 32 | #include "macro-assembler.h" |
| 33 | #include "serialize.h" |
| 34 | |
| 35 | namespace v8 { |
| 36 | namespace internal { |
| 37 | |
| 38 | // ----------------------------------------------------------------------------- |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 39 | // Implementation of CpuFeatures |
| 40 | |
| 41 | // The required user mode extensions in X64 are (from AMD64 ABI Table A.1): |
| 42 | // fpu, tsc, cx8, cmov, mmx, sse, sse2, fxsr, syscall |
| 43 | uint64_t CpuFeatures::supported_ = kDefaultCpuFeatures; |
| 44 | uint64_t CpuFeatures::enabled_ = 0; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 45 | uint64_t CpuFeatures::found_by_runtime_probing_ = 0; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 46 | |
| 47 | void CpuFeatures::Probe() { |
| 48 | ASSERT(Heap::HasBeenSetup()); |
| 49 | ASSERT(supported_ == kDefaultCpuFeatures); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 50 | if (Serializer::enabled()) { |
| 51 | supported_ |= OS::CpuFeaturesImpliedByPlatform(); |
| 52 | return; // No features if we might serialize. |
| 53 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 54 | |
| 55 | Assembler assm(NULL, 0); |
| 56 | Label cpuid, done; |
| 57 | #define __ assm. |
| 58 | // Save old rsp, since we are going to modify the stack. |
| 59 | __ push(rbp); |
| 60 | __ pushfq(); |
| 61 | __ push(rcx); |
| 62 | __ push(rbx); |
| 63 | __ movq(rbp, rsp); |
| 64 | |
| 65 | // If we can modify bit 21 of the EFLAGS register, then CPUID is supported. |
| 66 | __ pushfq(); |
| 67 | __ pop(rax); |
| 68 | __ movq(rdx, rax); |
| 69 | __ xor_(rax, Immediate(0x200000)); // Flip bit 21. |
| 70 | __ push(rax); |
| 71 | __ popfq(); |
| 72 | __ pushfq(); |
| 73 | __ pop(rax); |
| 74 | __ xor_(rax, rdx); // Different if CPUID is supported. |
| 75 | __ j(not_zero, &cpuid); |
| 76 | |
| 77 | // CPUID not supported. Clear the supported features in edx:eax. |
| 78 | __ xor_(rax, rax); |
| 79 | __ jmp(&done); |
| 80 | |
| 81 | // Invoke CPUID with 1 in eax to get feature information in |
| 82 | // ecx:edx. Temporarily enable CPUID support because we know it's |
| 83 | // safe here. |
| 84 | __ bind(&cpuid); |
| 85 | __ movq(rax, Immediate(1)); |
| 86 | supported_ = kDefaultCpuFeatures | (1 << CPUID); |
| 87 | { Scope fscope(CPUID); |
| 88 | __ cpuid(); |
| 89 | // Move the result from ecx:edx to rdi. |
| 90 | __ movl(rdi, rdx); // Zero-extended to 64 bits. |
| 91 | __ shl(rcx, Immediate(32)); |
| 92 | __ or_(rdi, rcx); |
| 93 | |
| 94 | // Get the sahf supported flag, from CPUID(0x80000001) |
| 95 | __ movq(rax, 0x80000001, RelocInfo::NONE); |
| 96 | __ cpuid(); |
| 97 | } |
| 98 | supported_ = kDefaultCpuFeatures; |
| 99 | |
| 100 | // Put the CPU flags in rax. |
| 101 | // rax = (rcx & 1) | (rdi & ~1) | (1 << CPUID). |
| 102 | __ movl(rax, Immediate(1)); |
| 103 | __ and_(rcx, rax); // Bit 0 is set if SAHF instruction supported. |
| 104 | __ not_(rax); |
| 105 | __ and_(rax, rdi); |
| 106 | __ or_(rax, rcx); |
| 107 | __ or_(rax, Immediate(1 << CPUID)); |
| 108 | |
| 109 | // Done. |
| 110 | __ bind(&done); |
| 111 | __ movq(rsp, rbp); |
| 112 | __ pop(rbx); |
| 113 | __ pop(rcx); |
| 114 | __ popfq(); |
| 115 | __ pop(rbp); |
| 116 | __ ret(0); |
| 117 | #undef __ |
| 118 | |
| 119 | CodeDesc desc; |
| 120 | assm.GetCode(&desc); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 121 | Object* code = Heap::CreateCode(desc, |
| 122 | NULL, |
| 123 | Code::ComputeFlags(Code::STUB), |
| 124 | Handle<Object>()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 125 | if (!code->IsCode()) return; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 126 | PROFILE(CodeCreateEvent(Logger::BUILTIN_TAG, |
| 127 | Code::cast(code), "CpuFeatures::Probe")); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 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 | found_by_runtime_probing_ &= ~kDefaultCpuFeatures; |
| 133 | uint64_t os_guarantees = OS::CpuFeaturesImpliedByPlatform(); |
| 134 | supported_ |= os_guarantees; |
| 135 | found_by_runtime_probing_ &= ~os_guarantees; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 136 | // SSE2 and CMOV must be available on an X64 CPU. |
| 137 | ASSERT(IsSupported(CPUID)); |
| 138 | ASSERT(IsSupported(SSE2)); |
| 139 | ASSERT(IsSupported(CMOV)); |
| 140 | } |
| 141 | |
| 142 | |
| 143 | // ----------------------------------------------------------------------------- |
| 144 | // Implementation of RelocInfo |
| 145 | |
| 146 | // Patch the code at the current PC with a call to the target address. |
| 147 | // Additional guard int3 instructions can be added if required. |
| 148 | void RelocInfo::PatchCodeWithCall(Address target, int guard_bytes) { |
| 149 | // Load register with immediate 64 and call through a register instructions |
| 150 | // takes up 13 bytes and int3 takes up one byte. |
| 151 | static const int kCallCodeSize = 13; |
| 152 | int code_size = kCallCodeSize + guard_bytes; |
| 153 | |
| 154 | // Create a code patcher. |
| 155 | CodePatcher patcher(pc_, code_size); |
| 156 | |
| 157 | // Add a label for checking the size of the code used for returning. |
| 158 | #ifdef DEBUG |
| 159 | Label check_codesize; |
| 160 | patcher.masm()->bind(&check_codesize); |
| 161 | #endif |
| 162 | |
| 163 | // Patch the code. |
| 164 | patcher.masm()->movq(r10, target, RelocInfo::NONE); |
| 165 | patcher.masm()->call(r10); |
| 166 | |
| 167 | // Check that the size of the code generated is as expected. |
| 168 | ASSERT_EQ(kCallCodeSize, |
| 169 | patcher.masm()->SizeOfCodeGeneratedSince(&check_codesize)); |
| 170 | |
| 171 | // Add the requested number of int3 instructions after the call. |
| 172 | for (int i = 0; i < guard_bytes; i++) { |
| 173 | patcher.masm()->int3(); |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | |
| 178 | void RelocInfo::PatchCode(byte* instructions, int instruction_count) { |
| 179 | // Patch the code at the current address with the supplied instructions. |
| 180 | for (int i = 0; i < instruction_count; i++) { |
| 181 | *(pc_ + i) = *(instructions + i); |
| 182 | } |
| 183 | |
| 184 | // Indicate that code has changed. |
| 185 | CPU::FlushICache(pc_, instruction_count); |
| 186 | } |
| 187 | |
| 188 | // ----------------------------------------------------------------------------- |
| 189 | // Implementation of Operand |
| 190 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 191 | Operand::Operand(Register base, int32_t disp) : rex_(0) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 192 | len_ = 1; |
| 193 | if (base.is(rsp) || base.is(r12)) { |
| 194 | // SIB byte is needed to encode (rsp + offset) or (r12 + offset). |
| 195 | set_sib(times_1, rsp, base); |
| 196 | } |
| 197 | |
| 198 | if (disp == 0 && !base.is(rbp) && !base.is(r13)) { |
| 199 | set_modrm(0, base); |
| 200 | } else if (is_int8(disp)) { |
| 201 | set_modrm(1, base); |
| 202 | set_disp8(disp); |
| 203 | } else { |
| 204 | set_modrm(2, base); |
| 205 | set_disp32(disp); |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | |
| 210 | Operand::Operand(Register base, |
| 211 | Register index, |
| 212 | ScaleFactor scale, |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 213 | int32_t disp) : rex_(0) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 214 | ASSERT(!index.is(rsp)); |
| 215 | len_ = 1; |
| 216 | set_sib(scale, index, base); |
| 217 | if (disp == 0 && !base.is(rbp) && !base.is(r13)) { |
| 218 | // This call to set_modrm doesn't overwrite the REX.B (or REX.X) bits |
| 219 | // possibly set by set_sib. |
| 220 | set_modrm(0, rsp); |
| 221 | } else if (is_int8(disp)) { |
| 222 | set_modrm(1, rsp); |
| 223 | set_disp8(disp); |
| 224 | } else { |
| 225 | set_modrm(2, rsp); |
| 226 | set_disp32(disp); |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 231 | Operand::Operand(Register index, |
| 232 | ScaleFactor scale, |
| 233 | int32_t disp) : rex_(0) { |
| 234 | ASSERT(!index.is(rsp)); |
| 235 | len_ = 1; |
| 236 | set_modrm(0, rsp); |
| 237 | set_sib(scale, index, rbp); |
| 238 | set_disp32(disp); |
| 239 | } |
| 240 | |
| 241 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 242 | Operand::Operand(const Operand& operand, int32_t offset) { |
| 243 | ASSERT(operand.len_ >= 1); |
| 244 | // Operand encodes REX ModR/M [SIB] [Disp]. |
| 245 | byte modrm = operand.buf_[0]; |
| 246 | ASSERT(modrm < 0xC0); // Disallow mode 3 (register target). |
| 247 | bool has_sib = ((modrm & 0x07) == 0x04); |
| 248 | byte mode = modrm & 0xC0; |
| 249 | int disp_offset = has_sib ? 2 : 1; |
| 250 | int base_reg = (has_sib ? operand.buf_[1] : modrm) & 0x07; |
| 251 | // Mode 0 with rbp/r13 as ModR/M or SIB base register always has a 32-bit |
| 252 | // displacement. |
| 253 | bool is_baseless = (mode == 0) && (base_reg == 0x05); // No base or RIP base. |
| 254 | int32_t disp_value = 0; |
| 255 | if (mode == 0x80 || is_baseless) { |
| 256 | // Mode 2 or mode 0 with rbp/r13 as base: Word displacement. |
| 257 | disp_value = *reinterpret_cast<const int32_t*>(&operand.buf_[disp_offset]); |
| 258 | } else if (mode == 0x40) { |
| 259 | // Mode 1: Byte displacement. |
| 260 | disp_value = static_cast<signed char>(operand.buf_[disp_offset]); |
| 261 | } |
| 262 | |
| 263 | // Write new operand with same registers, but with modified displacement. |
| 264 | ASSERT(offset >= 0 ? disp_value + offset > disp_value |
| 265 | : disp_value + offset < disp_value); // No overflow. |
| 266 | disp_value += offset; |
| 267 | rex_ = operand.rex_; |
| 268 | if (!is_int8(disp_value) || is_baseless) { |
| 269 | // Need 32 bits of displacement, mode 2 or mode 1 with register rbp/r13. |
| 270 | buf_[0] = (modrm & 0x3f) | (is_baseless ? 0x00 : 0x80); |
| 271 | len_ = disp_offset + 4; |
| 272 | Memory::int32_at(&buf_[disp_offset]) = disp_value; |
| 273 | } else if (disp_value != 0 || (base_reg == 0x05)) { |
| 274 | // Need 8 bits of displacement. |
| 275 | buf_[0] = (modrm & 0x3f) | 0x40; // Mode 1. |
| 276 | len_ = disp_offset + 1; |
| 277 | buf_[disp_offset] = static_cast<byte>(disp_value); |
| 278 | } else { |
| 279 | // Need no displacement. |
| 280 | buf_[0] = (modrm & 0x3f); // Mode 0. |
| 281 | len_ = disp_offset; |
| 282 | } |
| 283 | if (has_sib) { |
| 284 | buf_[1] = operand.buf_[1]; |
| 285 | } |
| 286 | } |
| 287 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 288 | // ----------------------------------------------------------------------------- |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 289 | // Implementation of Assembler. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 290 | |
| 291 | #ifdef GENERATED_CODE_COVERAGE |
| 292 | static void InitCoverageLog(); |
| 293 | #endif |
| 294 | |
| 295 | byte* Assembler::spare_buffer_ = NULL; |
| 296 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 297 | Assembler::Assembler(void* buffer, int buffer_size) |
| 298 | : code_targets_(100) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 299 | if (buffer == NULL) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 300 | // Do our own buffer management. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 301 | if (buffer_size <= kMinimalBufferSize) { |
| 302 | buffer_size = kMinimalBufferSize; |
| 303 | |
| 304 | if (spare_buffer_ != NULL) { |
| 305 | buffer = spare_buffer_; |
| 306 | spare_buffer_ = NULL; |
| 307 | } |
| 308 | } |
| 309 | if (buffer == NULL) { |
| 310 | buffer_ = NewArray<byte>(buffer_size); |
| 311 | } else { |
| 312 | buffer_ = static_cast<byte*>(buffer); |
| 313 | } |
| 314 | buffer_size_ = buffer_size; |
| 315 | own_buffer_ = true; |
| 316 | } else { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 317 | // Use externally provided buffer instead. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 318 | ASSERT(buffer_size > 0); |
| 319 | buffer_ = static_cast<byte*>(buffer); |
| 320 | buffer_size_ = buffer_size; |
| 321 | own_buffer_ = false; |
| 322 | } |
| 323 | |
| 324 | // Clear the buffer in debug mode unless it was provided by the |
| 325 | // caller in which case we can't be sure it's okay to overwrite |
| 326 | // existing code in it. |
| 327 | #ifdef DEBUG |
| 328 | if (own_buffer_) { |
| 329 | memset(buffer_, 0xCC, buffer_size); // int3 |
| 330 | } |
| 331 | #endif |
| 332 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 333 | // Setup buffer pointers. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 334 | ASSERT(buffer_ != NULL); |
| 335 | pc_ = buffer_; |
| 336 | reloc_info_writer.Reposition(buffer_ + buffer_size, pc_); |
| 337 | |
| 338 | last_pc_ = NULL; |
| 339 | current_statement_position_ = RelocInfo::kNoPosition; |
| 340 | current_position_ = RelocInfo::kNoPosition; |
| 341 | written_statement_position_ = current_statement_position_; |
| 342 | written_position_ = current_position_; |
| 343 | #ifdef GENERATED_CODE_COVERAGE |
| 344 | InitCoverageLog(); |
| 345 | #endif |
| 346 | } |
| 347 | |
| 348 | |
| 349 | Assembler::~Assembler() { |
| 350 | if (own_buffer_) { |
| 351 | if (spare_buffer_ == NULL && buffer_size_ == kMinimalBufferSize) { |
| 352 | spare_buffer_ = buffer_; |
| 353 | } else { |
| 354 | DeleteArray(buffer_); |
| 355 | } |
| 356 | } |
| 357 | } |
| 358 | |
| 359 | |
| 360 | void Assembler::GetCode(CodeDesc* desc) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 361 | // Finalize code (at this point overflow() may be true, but the gap ensures |
| 362 | // that we are still not overlapping instructions and relocation info). |
| 363 | ASSERT(pc_ <= reloc_info_writer.pos()); // No overlap. |
| 364 | // Setup code descriptor. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 365 | desc->buffer = buffer_; |
| 366 | desc->buffer_size = buffer_size_; |
| 367 | desc->instr_size = pc_offset(); |
| 368 | ASSERT(desc->instr_size > 0); // Zero-size code objects upset the system. |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 369 | desc->reloc_size = |
| 370 | static_cast<int>((buffer_ + buffer_size_) - reloc_info_writer.pos()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 371 | desc->origin = this; |
| 372 | |
| 373 | Counters::reloc_info_size.Increment(desc->reloc_size); |
| 374 | } |
| 375 | |
| 376 | |
| 377 | void Assembler::Align(int m) { |
| 378 | ASSERT(IsPowerOf2(m)); |
| 379 | while ((pc_offset() & (m - 1)) != 0) { |
| 380 | nop(); |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 385 | void Assembler::CodeTargetAlign() { |
| 386 | Align(16); // Preferred alignment of jump targets on x64. |
| 387 | } |
| 388 | |
| 389 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 390 | void Assembler::bind_to(Label* L, int pos) { |
| 391 | ASSERT(!L->is_bound()); // Label may only be bound once. |
| 392 | last_pc_ = NULL; |
| 393 | ASSERT(0 <= pos && pos <= pc_offset()); // Position must be valid. |
| 394 | if (L->is_linked()) { |
| 395 | int current = L->pos(); |
| 396 | int next = long_at(current); |
| 397 | while (next != current) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 398 | // Relative address, relative to point after address. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 399 | int imm32 = pos - (current + sizeof(int32_t)); |
| 400 | long_at_put(current, imm32); |
| 401 | current = next; |
| 402 | next = long_at(next); |
| 403 | } |
| 404 | // Fix up last fixup on linked list. |
| 405 | int last_imm32 = pos - (current + sizeof(int32_t)); |
| 406 | long_at_put(current, last_imm32); |
| 407 | } |
| 408 | L->bind_to(pos); |
| 409 | } |
| 410 | |
| 411 | |
| 412 | void Assembler::bind(Label* L) { |
| 413 | bind_to(L, pc_offset()); |
| 414 | } |
| 415 | |
| 416 | |
| 417 | void Assembler::GrowBuffer() { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 418 | ASSERT(buffer_overflow()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 419 | if (!own_buffer_) FATAL("external code buffer is too small"); |
| 420 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 421 | // Compute new buffer size. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 422 | CodeDesc desc; // the new buffer |
| 423 | if (buffer_size_ < 4*KB) { |
| 424 | desc.buffer_size = 4*KB; |
| 425 | } else { |
| 426 | desc.buffer_size = 2*buffer_size_; |
| 427 | } |
| 428 | // Some internal data structures overflow for very large buffers, |
| 429 | // they must ensure that kMaximalBufferSize is not too large. |
| 430 | if ((desc.buffer_size > kMaximalBufferSize) || |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 431 | (desc.buffer_size > Heap::MaxOldGenerationSize())) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 432 | V8::FatalProcessOutOfMemory("Assembler::GrowBuffer"); |
| 433 | } |
| 434 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 435 | // Setup new buffer. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 436 | desc.buffer = NewArray<byte>(desc.buffer_size); |
| 437 | desc.instr_size = pc_offset(); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 438 | desc.reloc_size = |
| 439 | static_cast<int>((buffer_ + buffer_size_) - (reloc_info_writer.pos())); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 440 | |
| 441 | // Clear the buffer in debug mode. Use 'int3' instructions to make |
| 442 | // sure to get into problems if we ever run uninitialized code. |
| 443 | #ifdef DEBUG |
| 444 | memset(desc.buffer, 0xCC, desc.buffer_size); |
| 445 | #endif |
| 446 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 447 | // Copy the data. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 448 | intptr_t pc_delta = desc.buffer - buffer_; |
| 449 | intptr_t rc_delta = (desc.buffer + desc.buffer_size) - |
| 450 | (buffer_ + buffer_size_); |
| 451 | memmove(desc.buffer, buffer_, desc.instr_size); |
| 452 | memmove(rc_delta + reloc_info_writer.pos(), |
| 453 | reloc_info_writer.pos(), desc.reloc_size); |
| 454 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 455 | // Switch buffers. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 456 | if (spare_buffer_ == NULL && buffer_size_ == kMinimalBufferSize) { |
| 457 | spare_buffer_ = buffer_; |
| 458 | } else { |
| 459 | DeleteArray(buffer_); |
| 460 | } |
| 461 | buffer_ = desc.buffer; |
| 462 | buffer_size_ = desc.buffer_size; |
| 463 | pc_ += pc_delta; |
| 464 | if (last_pc_ != NULL) { |
| 465 | last_pc_ += pc_delta; |
| 466 | } |
| 467 | reloc_info_writer.Reposition(reloc_info_writer.pos() + rc_delta, |
| 468 | reloc_info_writer.last_pc() + pc_delta); |
| 469 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 470 | // Relocate runtime entries. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 471 | for (RelocIterator it(desc); !it.done(); it.next()) { |
| 472 | RelocInfo::Mode rmode = it.rinfo()->rmode(); |
| 473 | if (rmode == RelocInfo::INTERNAL_REFERENCE) { |
| 474 | intptr_t* p = reinterpret_cast<intptr_t*>(it.rinfo()->pc()); |
| 475 | if (*p != 0) { // 0 means uninitialized. |
| 476 | *p += pc_delta; |
| 477 | } |
| 478 | } |
| 479 | } |
| 480 | |
| 481 | ASSERT(!buffer_overflow()); |
| 482 | } |
| 483 | |
| 484 | |
| 485 | void Assembler::emit_operand(int code, const Operand& adr) { |
| 486 | ASSERT(is_uint3(code)); |
| 487 | const unsigned length = adr.len_; |
| 488 | ASSERT(length > 0); |
| 489 | |
| 490 | // Emit updated ModR/M byte containing the given register. |
| 491 | ASSERT((adr.buf_[0] & 0x38) == 0); |
| 492 | pc_[0] = adr.buf_[0] | code << 3; |
| 493 | |
| 494 | // Emit the rest of the encoded operand. |
| 495 | for (unsigned i = 1; i < length; i++) pc_[i] = adr.buf_[i]; |
| 496 | pc_ += length; |
| 497 | } |
| 498 | |
| 499 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 500 | // Assembler Instruction implementations. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 501 | |
| 502 | void Assembler::arithmetic_op(byte opcode, Register reg, const Operand& op) { |
| 503 | EnsureSpace ensure_space(this); |
| 504 | last_pc_ = pc_; |
| 505 | emit_rex_64(reg, op); |
| 506 | emit(opcode); |
| 507 | emit_operand(reg, op); |
| 508 | } |
| 509 | |
| 510 | |
| 511 | void Assembler::arithmetic_op(byte opcode, Register reg, Register rm_reg) { |
| 512 | EnsureSpace ensure_space(this); |
| 513 | last_pc_ = pc_; |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 514 | ASSERT((opcode & 0xC6) == 2); |
| 515 | if (rm_reg.low_bits() == 4) { // Forces SIB byte. |
| 516 | // Swap reg and rm_reg and change opcode operand order. |
| 517 | emit_rex_64(rm_reg, reg); |
| 518 | emit(opcode ^ 0x02); |
| 519 | emit_modrm(rm_reg, reg); |
| 520 | } else { |
| 521 | emit_rex_64(reg, rm_reg); |
| 522 | emit(opcode); |
| 523 | emit_modrm(reg, rm_reg); |
| 524 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 525 | } |
| 526 | |
| 527 | |
| 528 | void Assembler::arithmetic_op_16(byte opcode, Register reg, Register rm_reg) { |
| 529 | EnsureSpace ensure_space(this); |
| 530 | last_pc_ = pc_; |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 531 | ASSERT((opcode & 0xC6) == 2); |
| 532 | if (rm_reg.low_bits() == 4) { // Forces SIB byte. |
| 533 | // Swap reg and rm_reg and change opcode operand order. |
| 534 | emit(0x66); |
| 535 | emit_optional_rex_32(rm_reg, reg); |
| 536 | emit(opcode ^ 0x02); |
| 537 | emit_modrm(rm_reg, reg); |
| 538 | } else { |
| 539 | emit(0x66); |
| 540 | emit_optional_rex_32(reg, rm_reg); |
| 541 | emit(opcode); |
| 542 | emit_modrm(reg, rm_reg); |
| 543 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 544 | } |
| 545 | |
| 546 | |
| 547 | void Assembler::arithmetic_op_16(byte opcode, |
| 548 | Register reg, |
| 549 | const Operand& rm_reg) { |
| 550 | EnsureSpace ensure_space(this); |
| 551 | last_pc_ = pc_; |
| 552 | emit(0x66); |
| 553 | emit_optional_rex_32(reg, rm_reg); |
| 554 | emit(opcode); |
| 555 | emit_operand(reg, rm_reg); |
| 556 | } |
| 557 | |
| 558 | |
| 559 | void Assembler::arithmetic_op_32(byte opcode, Register reg, Register rm_reg) { |
| 560 | EnsureSpace ensure_space(this); |
| 561 | last_pc_ = pc_; |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 562 | ASSERT((opcode & 0xC6) == 2); |
| 563 | if (rm_reg.low_bits() == 4) { // Forces SIB byte. |
| 564 | // Swap reg and rm_reg and change opcode operand order. |
| 565 | emit_optional_rex_32(rm_reg, reg); |
| 566 | emit(opcode ^ 0x02); // E.g. 0x03 -> 0x01 for ADD. |
| 567 | emit_modrm(rm_reg, reg); |
| 568 | } else { |
| 569 | emit_optional_rex_32(reg, rm_reg); |
| 570 | emit(opcode); |
| 571 | emit_modrm(reg, rm_reg); |
| 572 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 573 | } |
| 574 | |
| 575 | |
| 576 | void Assembler::arithmetic_op_32(byte opcode, |
| 577 | Register reg, |
| 578 | const Operand& rm_reg) { |
| 579 | EnsureSpace ensure_space(this); |
| 580 | last_pc_ = pc_; |
| 581 | emit_optional_rex_32(reg, rm_reg); |
| 582 | emit(opcode); |
| 583 | emit_operand(reg, rm_reg); |
| 584 | } |
| 585 | |
| 586 | |
| 587 | void Assembler::immediate_arithmetic_op(byte subcode, |
| 588 | Register dst, |
| 589 | Immediate src) { |
| 590 | EnsureSpace ensure_space(this); |
| 591 | last_pc_ = pc_; |
| 592 | emit_rex_64(dst); |
| 593 | if (is_int8(src.value_)) { |
| 594 | emit(0x83); |
| 595 | emit_modrm(subcode, dst); |
| 596 | emit(src.value_); |
| 597 | } else if (dst.is(rax)) { |
| 598 | emit(0x05 | (subcode << 3)); |
| 599 | emitl(src.value_); |
| 600 | } else { |
| 601 | emit(0x81); |
| 602 | emit_modrm(subcode, dst); |
| 603 | emitl(src.value_); |
| 604 | } |
| 605 | } |
| 606 | |
| 607 | void Assembler::immediate_arithmetic_op(byte subcode, |
| 608 | const Operand& dst, |
| 609 | Immediate src) { |
| 610 | EnsureSpace ensure_space(this); |
| 611 | last_pc_ = pc_; |
| 612 | emit_rex_64(dst); |
| 613 | if (is_int8(src.value_)) { |
| 614 | emit(0x83); |
| 615 | emit_operand(subcode, dst); |
| 616 | emit(src.value_); |
| 617 | } else { |
| 618 | emit(0x81); |
| 619 | emit_operand(subcode, dst); |
| 620 | emitl(src.value_); |
| 621 | } |
| 622 | } |
| 623 | |
| 624 | |
| 625 | void Assembler::immediate_arithmetic_op_16(byte subcode, |
| 626 | Register dst, |
| 627 | Immediate src) { |
| 628 | EnsureSpace ensure_space(this); |
| 629 | last_pc_ = pc_; |
| 630 | emit(0x66); // Operand size override prefix. |
| 631 | emit_optional_rex_32(dst); |
| 632 | if (is_int8(src.value_)) { |
| 633 | emit(0x83); |
| 634 | emit_modrm(subcode, dst); |
| 635 | emit(src.value_); |
| 636 | } else if (dst.is(rax)) { |
| 637 | emit(0x05 | (subcode << 3)); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 638 | emitw(src.value_); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 639 | } else { |
| 640 | emit(0x81); |
| 641 | emit_modrm(subcode, dst); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 642 | emitw(src.value_); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 643 | } |
| 644 | } |
| 645 | |
| 646 | |
| 647 | void Assembler::immediate_arithmetic_op_16(byte subcode, |
| 648 | const Operand& dst, |
| 649 | Immediate src) { |
| 650 | EnsureSpace ensure_space(this); |
| 651 | last_pc_ = pc_; |
| 652 | emit(0x66); // Operand size override prefix. |
| 653 | emit_optional_rex_32(dst); |
| 654 | if (is_int8(src.value_)) { |
| 655 | emit(0x83); |
| 656 | emit_operand(subcode, dst); |
| 657 | emit(src.value_); |
| 658 | } else { |
| 659 | emit(0x81); |
| 660 | emit_operand(subcode, dst); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 661 | emitw(src.value_); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 662 | } |
| 663 | } |
| 664 | |
| 665 | |
| 666 | void Assembler::immediate_arithmetic_op_32(byte subcode, |
| 667 | Register dst, |
| 668 | Immediate src) { |
| 669 | EnsureSpace ensure_space(this); |
| 670 | last_pc_ = pc_; |
| 671 | emit_optional_rex_32(dst); |
| 672 | if (is_int8(src.value_)) { |
| 673 | emit(0x83); |
| 674 | emit_modrm(subcode, dst); |
| 675 | emit(src.value_); |
| 676 | } else if (dst.is(rax)) { |
| 677 | emit(0x05 | (subcode << 3)); |
| 678 | emitl(src.value_); |
| 679 | } else { |
| 680 | emit(0x81); |
| 681 | emit_modrm(subcode, dst); |
| 682 | emitl(src.value_); |
| 683 | } |
| 684 | } |
| 685 | |
| 686 | |
| 687 | void Assembler::immediate_arithmetic_op_32(byte subcode, |
| 688 | const Operand& dst, |
| 689 | Immediate src) { |
| 690 | EnsureSpace ensure_space(this); |
| 691 | last_pc_ = pc_; |
| 692 | emit_optional_rex_32(dst); |
| 693 | if (is_int8(src.value_)) { |
| 694 | emit(0x83); |
| 695 | emit_operand(subcode, dst); |
| 696 | emit(src.value_); |
| 697 | } else { |
| 698 | emit(0x81); |
| 699 | emit_operand(subcode, dst); |
| 700 | emitl(src.value_); |
| 701 | } |
| 702 | } |
| 703 | |
| 704 | |
| 705 | void Assembler::immediate_arithmetic_op_8(byte subcode, |
| 706 | const Operand& dst, |
| 707 | Immediate src) { |
| 708 | EnsureSpace ensure_space(this); |
| 709 | last_pc_ = pc_; |
| 710 | emit_optional_rex_32(dst); |
| 711 | ASSERT(is_int8(src.value_) || is_uint8(src.value_)); |
| 712 | emit(0x80); |
| 713 | emit_operand(subcode, dst); |
| 714 | emit(src.value_); |
| 715 | } |
| 716 | |
| 717 | |
| 718 | void Assembler::immediate_arithmetic_op_8(byte subcode, |
| 719 | Register dst, |
| 720 | Immediate src) { |
| 721 | EnsureSpace ensure_space(this); |
| 722 | last_pc_ = pc_; |
| 723 | if (dst.code() > 3) { |
| 724 | // Use 64-bit mode byte registers. |
| 725 | emit_rex_64(dst); |
| 726 | } |
| 727 | ASSERT(is_int8(src.value_) || is_uint8(src.value_)); |
| 728 | emit(0x80); |
| 729 | emit_modrm(subcode, dst); |
| 730 | emit(src.value_); |
| 731 | } |
| 732 | |
| 733 | |
| 734 | void Assembler::shift(Register dst, Immediate shift_amount, int subcode) { |
| 735 | EnsureSpace ensure_space(this); |
| 736 | last_pc_ = pc_; |
| 737 | ASSERT(is_uint6(shift_amount.value_)); // illegal shift count |
| 738 | if (shift_amount.value_ == 1) { |
| 739 | emit_rex_64(dst); |
| 740 | emit(0xD1); |
| 741 | emit_modrm(subcode, dst); |
| 742 | } else { |
| 743 | emit_rex_64(dst); |
| 744 | emit(0xC1); |
| 745 | emit_modrm(subcode, dst); |
| 746 | emit(shift_amount.value_); |
| 747 | } |
| 748 | } |
| 749 | |
| 750 | |
| 751 | void Assembler::shift(Register dst, int subcode) { |
| 752 | EnsureSpace ensure_space(this); |
| 753 | last_pc_ = pc_; |
| 754 | emit_rex_64(dst); |
| 755 | emit(0xD3); |
| 756 | emit_modrm(subcode, dst); |
| 757 | } |
| 758 | |
| 759 | |
| 760 | void Assembler::shift_32(Register dst, int subcode) { |
| 761 | EnsureSpace ensure_space(this); |
| 762 | last_pc_ = pc_; |
| 763 | emit_optional_rex_32(dst); |
| 764 | emit(0xD3); |
| 765 | emit_modrm(subcode, dst); |
| 766 | } |
| 767 | |
| 768 | |
| 769 | void Assembler::shift_32(Register dst, Immediate shift_amount, int subcode) { |
| 770 | EnsureSpace ensure_space(this); |
| 771 | last_pc_ = pc_; |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 772 | ASSERT(is_uint5(shift_amount.value_)); // illegal shift count |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 773 | if (shift_amount.value_ == 1) { |
| 774 | emit_optional_rex_32(dst); |
| 775 | emit(0xD1); |
| 776 | emit_modrm(subcode, dst); |
| 777 | } else { |
| 778 | emit_optional_rex_32(dst); |
| 779 | emit(0xC1); |
| 780 | emit_modrm(subcode, dst); |
| 781 | emit(shift_amount.value_); |
| 782 | } |
| 783 | } |
| 784 | |
| 785 | |
| 786 | void Assembler::bt(const Operand& dst, Register src) { |
| 787 | EnsureSpace ensure_space(this); |
| 788 | last_pc_ = pc_; |
| 789 | emit_rex_64(src, dst); |
| 790 | emit(0x0F); |
| 791 | emit(0xA3); |
| 792 | emit_operand(src, dst); |
| 793 | } |
| 794 | |
| 795 | |
| 796 | void Assembler::bts(const Operand& dst, Register src) { |
| 797 | EnsureSpace ensure_space(this); |
| 798 | last_pc_ = pc_; |
| 799 | emit_rex_64(src, dst); |
| 800 | emit(0x0F); |
| 801 | emit(0xAB); |
| 802 | emit_operand(src, dst); |
| 803 | } |
| 804 | |
| 805 | |
| 806 | void Assembler::call(Label* L) { |
| 807 | EnsureSpace ensure_space(this); |
| 808 | last_pc_ = pc_; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 809 | // 1110 1000 #32-bit disp. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 810 | emit(0xE8); |
| 811 | if (L->is_bound()) { |
| 812 | int offset = L->pos() - pc_offset() - sizeof(int32_t); |
| 813 | ASSERT(offset <= 0); |
| 814 | emitl(offset); |
| 815 | } else if (L->is_linked()) { |
| 816 | emitl(L->pos()); |
| 817 | L->link_to(pc_offset() - sizeof(int32_t)); |
| 818 | } else { |
| 819 | ASSERT(L->is_unused()); |
| 820 | int32_t current = pc_offset(); |
| 821 | emitl(current); |
| 822 | L->link_to(current); |
| 823 | } |
| 824 | } |
| 825 | |
| 826 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 827 | void Assembler::call(Handle<Code> target, RelocInfo::Mode rmode) { |
| 828 | EnsureSpace ensure_space(this); |
| 829 | last_pc_ = pc_; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 830 | // 1110 1000 #32-bit disp. |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 831 | emit(0xE8); |
| 832 | emit_code_target(target, rmode); |
| 833 | } |
| 834 | |
| 835 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 836 | void Assembler::call(Register adr) { |
| 837 | EnsureSpace ensure_space(this); |
| 838 | last_pc_ = pc_; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 839 | // Opcode: FF /2 r64. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 840 | if (adr.high_bit()) { |
| 841 | emit_rex_64(adr); |
| 842 | } |
| 843 | emit(0xFF); |
| 844 | emit_modrm(0x2, adr); |
| 845 | } |
| 846 | |
| 847 | |
| 848 | void Assembler::call(const Operand& op) { |
| 849 | EnsureSpace ensure_space(this); |
| 850 | last_pc_ = pc_; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 851 | // Opcode: FF /2 m64. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 852 | emit_rex_64(op); |
| 853 | emit(0xFF); |
| 854 | emit_operand(2, op); |
| 855 | } |
| 856 | |
| 857 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 858 | void Assembler::clc() { |
| 859 | EnsureSpace ensure_space(this); |
| 860 | last_pc_ = pc_; |
| 861 | emit(0xF8); |
| 862 | } |
| 863 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 864 | void Assembler::cdq() { |
| 865 | EnsureSpace ensure_space(this); |
| 866 | last_pc_ = pc_; |
| 867 | emit(0x99); |
| 868 | } |
| 869 | |
| 870 | |
| 871 | void Assembler::cmovq(Condition cc, Register dst, Register src) { |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 872 | if (cc == always) { |
| 873 | movq(dst, src); |
| 874 | } else if (cc == never) { |
| 875 | return; |
| 876 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 877 | // No need to check CpuInfo for CMOV support, it's a required part of the |
| 878 | // 64-bit architecture. |
| 879 | ASSERT(cc >= 0); // Use mov for unconditional moves. |
| 880 | EnsureSpace ensure_space(this); |
| 881 | last_pc_ = pc_; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 882 | // Opcode: REX.W 0f 40 + cc /r. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 883 | emit_rex_64(dst, src); |
| 884 | emit(0x0f); |
| 885 | emit(0x40 + cc); |
| 886 | emit_modrm(dst, src); |
| 887 | } |
| 888 | |
| 889 | |
| 890 | void Assembler::cmovq(Condition cc, Register dst, const Operand& src) { |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 891 | if (cc == always) { |
| 892 | movq(dst, src); |
| 893 | } else if (cc == never) { |
| 894 | return; |
| 895 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 896 | ASSERT(cc >= 0); |
| 897 | EnsureSpace ensure_space(this); |
| 898 | last_pc_ = pc_; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 899 | // Opcode: REX.W 0f 40 + cc /r. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 900 | emit_rex_64(dst, src); |
| 901 | emit(0x0f); |
| 902 | emit(0x40 + cc); |
| 903 | emit_operand(dst, src); |
| 904 | } |
| 905 | |
| 906 | |
| 907 | void Assembler::cmovl(Condition cc, Register dst, Register src) { |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 908 | if (cc == always) { |
| 909 | movl(dst, src); |
| 910 | } else if (cc == never) { |
| 911 | return; |
| 912 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 913 | ASSERT(cc >= 0); |
| 914 | EnsureSpace ensure_space(this); |
| 915 | last_pc_ = pc_; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 916 | // Opcode: 0f 40 + cc /r. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 917 | emit_optional_rex_32(dst, src); |
| 918 | emit(0x0f); |
| 919 | emit(0x40 + cc); |
| 920 | emit_modrm(dst, src); |
| 921 | } |
| 922 | |
| 923 | |
| 924 | void Assembler::cmovl(Condition cc, Register dst, const Operand& src) { |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 925 | if (cc == always) { |
| 926 | movl(dst, src); |
| 927 | } else if (cc == never) { |
| 928 | return; |
| 929 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 930 | ASSERT(cc >= 0); |
| 931 | EnsureSpace ensure_space(this); |
| 932 | last_pc_ = pc_; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 933 | // Opcode: 0f 40 + cc /r. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 934 | emit_optional_rex_32(dst, src); |
| 935 | emit(0x0f); |
| 936 | emit(0x40 + cc); |
| 937 | emit_operand(dst, src); |
| 938 | } |
| 939 | |
| 940 | |
| 941 | void Assembler::cmpb_al(Immediate imm8) { |
| 942 | ASSERT(is_int8(imm8.value_) || is_uint8(imm8.value_)); |
| 943 | EnsureSpace ensure_space(this); |
| 944 | last_pc_ = pc_; |
| 945 | emit(0x3c); |
| 946 | emit(imm8.value_); |
| 947 | } |
| 948 | |
| 949 | |
| 950 | void Assembler::cpuid() { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 951 | ASSERT(CpuFeatures::IsEnabled(CPUID)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 952 | EnsureSpace ensure_space(this); |
| 953 | last_pc_ = pc_; |
| 954 | emit(0x0F); |
| 955 | emit(0xA2); |
| 956 | } |
| 957 | |
| 958 | |
| 959 | void Assembler::cqo() { |
| 960 | EnsureSpace ensure_space(this); |
| 961 | last_pc_ = pc_; |
| 962 | emit_rex_64(); |
| 963 | emit(0x99); |
| 964 | } |
| 965 | |
| 966 | |
| 967 | void Assembler::decq(Register dst) { |
| 968 | EnsureSpace ensure_space(this); |
| 969 | last_pc_ = pc_; |
| 970 | emit_rex_64(dst); |
| 971 | emit(0xFF); |
| 972 | emit_modrm(0x1, dst); |
| 973 | } |
| 974 | |
| 975 | |
| 976 | void Assembler::decq(const Operand& dst) { |
| 977 | EnsureSpace ensure_space(this); |
| 978 | last_pc_ = pc_; |
| 979 | emit_rex_64(dst); |
| 980 | emit(0xFF); |
| 981 | emit_operand(1, dst); |
| 982 | } |
| 983 | |
| 984 | |
| 985 | void Assembler::decl(Register dst) { |
| 986 | EnsureSpace ensure_space(this); |
| 987 | last_pc_ = pc_; |
| 988 | emit_optional_rex_32(dst); |
| 989 | emit(0xFF); |
| 990 | emit_modrm(0x1, dst); |
| 991 | } |
| 992 | |
| 993 | |
| 994 | void Assembler::decl(const Operand& dst) { |
| 995 | EnsureSpace ensure_space(this); |
| 996 | last_pc_ = pc_; |
| 997 | emit_optional_rex_32(dst); |
| 998 | emit(0xFF); |
| 999 | emit_operand(1, dst); |
| 1000 | } |
| 1001 | |
| 1002 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1003 | void Assembler::decb(Register dst) { |
| 1004 | EnsureSpace ensure_space(this); |
| 1005 | last_pc_ = pc_; |
| 1006 | if (dst.code() > 3) { |
| 1007 | // Register is not one of al, bl, cl, dl. Its encoding needs REX. |
| 1008 | emit_rex_32(dst); |
| 1009 | } |
| 1010 | emit(0xFE); |
| 1011 | emit_modrm(0x1, dst); |
| 1012 | } |
| 1013 | |
| 1014 | |
| 1015 | void Assembler::decb(const Operand& dst) { |
| 1016 | EnsureSpace ensure_space(this); |
| 1017 | last_pc_ = pc_; |
| 1018 | emit_optional_rex_32(dst); |
| 1019 | emit(0xFE); |
| 1020 | emit_operand(1, dst); |
| 1021 | } |
| 1022 | |
| 1023 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1024 | void Assembler::enter(Immediate size) { |
| 1025 | EnsureSpace ensure_space(this); |
| 1026 | last_pc_ = pc_; |
| 1027 | emit(0xC8); |
| 1028 | emitw(size.value_); // 16 bit operand, always. |
| 1029 | emit(0); |
| 1030 | } |
| 1031 | |
| 1032 | |
| 1033 | void Assembler::hlt() { |
| 1034 | EnsureSpace ensure_space(this); |
| 1035 | last_pc_ = pc_; |
| 1036 | emit(0xF4); |
| 1037 | } |
| 1038 | |
| 1039 | |
| 1040 | void Assembler::idivq(Register src) { |
| 1041 | EnsureSpace ensure_space(this); |
| 1042 | last_pc_ = pc_; |
| 1043 | emit_rex_64(src); |
| 1044 | emit(0xF7); |
| 1045 | emit_modrm(0x7, src); |
| 1046 | } |
| 1047 | |
| 1048 | |
| 1049 | void Assembler::idivl(Register src) { |
| 1050 | EnsureSpace ensure_space(this); |
| 1051 | last_pc_ = pc_; |
| 1052 | emit_optional_rex_32(src); |
| 1053 | emit(0xF7); |
| 1054 | emit_modrm(0x7, src); |
| 1055 | } |
| 1056 | |
| 1057 | |
| 1058 | void Assembler::imul(Register src) { |
| 1059 | EnsureSpace ensure_space(this); |
| 1060 | last_pc_ = pc_; |
| 1061 | emit_rex_64(src); |
| 1062 | emit(0xF7); |
| 1063 | emit_modrm(0x5, src); |
| 1064 | } |
| 1065 | |
| 1066 | |
| 1067 | void Assembler::imul(Register dst, Register src) { |
| 1068 | EnsureSpace ensure_space(this); |
| 1069 | last_pc_ = pc_; |
| 1070 | emit_rex_64(dst, src); |
| 1071 | emit(0x0F); |
| 1072 | emit(0xAF); |
| 1073 | emit_modrm(dst, src); |
| 1074 | } |
| 1075 | |
| 1076 | |
| 1077 | void Assembler::imul(Register dst, const Operand& src) { |
| 1078 | EnsureSpace ensure_space(this); |
| 1079 | last_pc_ = pc_; |
| 1080 | emit_rex_64(dst, src); |
| 1081 | emit(0x0F); |
| 1082 | emit(0xAF); |
| 1083 | emit_operand(dst, src); |
| 1084 | } |
| 1085 | |
| 1086 | |
| 1087 | void Assembler::imul(Register dst, Register src, Immediate imm) { |
| 1088 | EnsureSpace ensure_space(this); |
| 1089 | last_pc_ = pc_; |
| 1090 | emit_rex_64(dst, src); |
| 1091 | if (is_int8(imm.value_)) { |
| 1092 | emit(0x6B); |
| 1093 | emit_modrm(dst, src); |
| 1094 | emit(imm.value_); |
| 1095 | } else { |
| 1096 | emit(0x69); |
| 1097 | emit_modrm(dst, src); |
| 1098 | emitl(imm.value_); |
| 1099 | } |
| 1100 | } |
| 1101 | |
| 1102 | |
| 1103 | void Assembler::imull(Register dst, Register src) { |
| 1104 | EnsureSpace ensure_space(this); |
| 1105 | last_pc_ = pc_; |
| 1106 | emit_optional_rex_32(dst, src); |
| 1107 | emit(0x0F); |
| 1108 | emit(0xAF); |
| 1109 | emit_modrm(dst, src); |
| 1110 | } |
| 1111 | |
| 1112 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1113 | void Assembler::imull(Register dst, Register src, Immediate imm) { |
| 1114 | EnsureSpace ensure_space(this); |
| 1115 | last_pc_ = pc_; |
| 1116 | emit_optional_rex_32(dst, src); |
| 1117 | if (is_int8(imm.value_)) { |
| 1118 | emit(0x6B); |
| 1119 | emit_modrm(dst, src); |
| 1120 | emit(imm.value_); |
| 1121 | } else { |
| 1122 | emit(0x69); |
| 1123 | emit_modrm(dst, src); |
| 1124 | emitl(imm.value_); |
| 1125 | } |
| 1126 | } |
| 1127 | |
| 1128 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1129 | void Assembler::incq(Register dst) { |
| 1130 | EnsureSpace ensure_space(this); |
| 1131 | last_pc_ = pc_; |
| 1132 | emit_rex_64(dst); |
| 1133 | emit(0xFF); |
| 1134 | emit_modrm(0x0, dst); |
| 1135 | } |
| 1136 | |
| 1137 | |
| 1138 | void Assembler::incq(const Operand& dst) { |
| 1139 | EnsureSpace ensure_space(this); |
| 1140 | last_pc_ = pc_; |
| 1141 | emit_rex_64(dst); |
| 1142 | emit(0xFF); |
| 1143 | emit_operand(0, dst); |
| 1144 | } |
| 1145 | |
| 1146 | |
| 1147 | void Assembler::incl(const Operand& dst) { |
| 1148 | EnsureSpace ensure_space(this); |
| 1149 | last_pc_ = pc_; |
| 1150 | emit_optional_rex_32(dst); |
| 1151 | emit(0xFF); |
| 1152 | emit_operand(0, dst); |
| 1153 | } |
| 1154 | |
| 1155 | |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 1156 | void Assembler::incl(Register dst) { |
| 1157 | EnsureSpace ensure_space(this); |
| 1158 | last_pc_ = pc_; |
| 1159 | emit_optional_rex_32(dst); |
| 1160 | emit(0xFF); |
| 1161 | emit_modrm(0, dst); |
| 1162 | } |
| 1163 | |
| 1164 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1165 | void Assembler::int3() { |
| 1166 | EnsureSpace ensure_space(this); |
| 1167 | last_pc_ = pc_; |
| 1168 | emit(0xCC); |
| 1169 | } |
| 1170 | |
| 1171 | |
| 1172 | void Assembler::j(Condition cc, Label* L) { |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1173 | if (cc == always) { |
| 1174 | jmp(L); |
| 1175 | return; |
| 1176 | } else if (cc == never) { |
| 1177 | return; |
| 1178 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1179 | EnsureSpace ensure_space(this); |
| 1180 | last_pc_ = pc_; |
| 1181 | ASSERT(is_uint4(cc)); |
| 1182 | if (L->is_bound()) { |
| 1183 | const int short_size = 2; |
| 1184 | const int long_size = 6; |
| 1185 | int offs = L->pos() - pc_offset(); |
| 1186 | ASSERT(offs <= 0); |
| 1187 | if (is_int8(offs - short_size)) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1188 | // 0111 tttn #8-bit disp. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1189 | emit(0x70 | cc); |
| 1190 | emit((offs - short_size) & 0xFF); |
| 1191 | } else { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1192 | // 0000 1111 1000 tttn #32-bit disp. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1193 | emit(0x0F); |
| 1194 | emit(0x80 | cc); |
| 1195 | emitl(offs - long_size); |
| 1196 | } |
| 1197 | } else if (L->is_linked()) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1198 | // 0000 1111 1000 tttn #32-bit disp. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1199 | emit(0x0F); |
| 1200 | emit(0x80 | cc); |
| 1201 | emitl(L->pos()); |
| 1202 | L->link_to(pc_offset() - sizeof(int32_t)); |
| 1203 | } else { |
| 1204 | ASSERT(L->is_unused()); |
| 1205 | emit(0x0F); |
| 1206 | emit(0x80 | cc); |
| 1207 | int32_t current = pc_offset(); |
| 1208 | emitl(current); |
| 1209 | L->link_to(current); |
| 1210 | } |
| 1211 | } |
| 1212 | |
| 1213 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1214 | void Assembler::j(Condition cc, |
| 1215 | Handle<Code> target, |
| 1216 | RelocInfo::Mode rmode) { |
| 1217 | EnsureSpace ensure_space(this); |
| 1218 | last_pc_ = pc_; |
| 1219 | ASSERT(is_uint4(cc)); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1220 | // 0000 1111 1000 tttn #32-bit disp. |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1221 | emit(0x0F); |
| 1222 | emit(0x80 | cc); |
| 1223 | emit_code_target(target, rmode); |
| 1224 | } |
| 1225 | |
| 1226 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1227 | void Assembler::jmp(Label* L) { |
| 1228 | EnsureSpace ensure_space(this); |
| 1229 | last_pc_ = pc_; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1230 | const int short_size = sizeof(int8_t); |
| 1231 | const int long_size = sizeof(int32_t); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1232 | if (L->is_bound()) { |
| 1233 | int offs = L->pos() - pc_offset() - 1; |
| 1234 | ASSERT(offs <= 0); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1235 | if (is_int8(offs - short_size)) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1236 | // 1110 1011 #8-bit disp. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1237 | emit(0xEB); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1238 | emit((offs - short_size) & 0xFF); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1239 | } else { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1240 | // 1110 1001 #32-bit disp. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1241 | emit(0xE9); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1242 | emitl(offs - long_size); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1243 | } |
| 1244 | } else if (L->is_linked()) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1245 | // 1110 1001 #32-bit disp. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1246 | emit(0xE9); |
| 1247 | emitl(L->pos()); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1248 | L->link_to(pc_offset() - long_size); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1249 | } else { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1250 | // 1110 1001 #32-bit disp. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1251 | ASSERT(L->is_unused()); |
| 1252 | emit(0xE9); |
| 1253 | int32_t current = pc_offset(); |
| 1254 | emitl(current); |
| 1255 | L->link_to(current); |
| 1256 | } |
| 1257 | } |
| 1258 | |
| 1259 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1260 | void Assembler::jmp(Handle<Code> target, RelocInfo::Mode rmode) { |
| 1261 | EnsureSpace ensure_space(this); |
| 1262 | last_pc_ = pc_; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1263 | // 1110 1001 #32-bit disp. |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1264 | emit(0xE9); |
| 1265 | emit_code_target(target, rmode); |
| 1266 | } |
| 1267 | |
| 1268 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1269 | void Assembler::jmp(Register target) { |
| 1270 | EnsureSpace ensure_space(this); |
| 1271 | last_pc_ = pc_; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1272 | // Opcode FF/4 r64. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1273 | if (target.high_bit()) { |
| 1274 | emit_rex_64(target); |
| 1275 | } |
| 1276 | emit(0xFF); |
| 1277 | emit_modrm(0x4, target); |
| 1278 | } |
| 1279 | |
| 1280 | |
| 1281 | void Assembler::jmp(const Operand& src) { |
| 1282 | EnsureSpace ensure_space(this); |
| 1283 | last_pc_ = pc_; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1284 | // Opcode FF/4 m64. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1285 | emit_optional_rex_32(src); |
| 1286 | emit(0xFF); |
| 1287 | emit_operand(0x4, src); |
| 1288 | } |
| 1289 | |
| 1290 | |
| 1291 | void Assembler::lea(Register dst, const Operand& src) { |
| 1292 | EnsureSpace ensure_space(this); |
| 1293 | last_pc_ = pc_; |
| 1294 | emit_rex_64(dst, src); |
| 1295 | emit(0x8D); |
| 1296 | emit_operand(dst, src); |
| 1297 | } |
| 1298 | |
| 1299 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1300 | void Assembler::leal(Register dst, const Operand& src) { |
| 1301 | EnsureSpace ensure_space(this); |
| 1302 | last_pc_ = pc_; |
| 1303 | emit_optional_rex_32(dst, src); |
| 1304 | emit(0x8D); |
| 1305 | emit_operand(dst, src); |
| 1306 | } |
| 1307 | |
| 1308 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1309 | void Assembler::load_rax(void* value, RelocInfo::Mode mode) { |
| 1310 | EnsureSpace ensure_space(this); |
| 1311 | last_pc_ = pc_; |
| 1312 | emit(0x48); // REX.W |
| 1313 | emit(0xA1); |
| 1314 | emitq(reinterpret_cast<uintptr_t>(value), mode); |
| 1315 | } |
| 1316 | |
| 1317 | |
| 1318 | void Assembler::load_rax(ExternalReference ref) { |
| 1319 | load_rax(ref.address(), RelocInfo::EXTERNAL_REFERENCE); |
| 1320 | } |
| 1321 | |
| 1322 | |
| 1323 | void Assembler::leave() { |
| 1324 | EnsureSpace ensure_space(this); |
| 1325 | last_pc_ = pc_; |
| 1326 | emit(0xC9); |
| 1327 | } |
| 1328 | |
| 1329 | |
| 1330 | void Assembler::movb(Register dst, const Operand& src) { |
| 1331 | EnsureSpace ensure_space(this); |
| 1332 | last_pc_ = pc_; |
| 1333 | emit_rex_32(dst, src); |
| 1334 | emit(0x8A); |
| 1335 | emit_operand(dst, src); |
| 1336 | } |
| 1337 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1338 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1339 | void Assembler::movb(Register dst, Immediate imm) { |
| 1340 | EnsureSpace ensure_space(this); |
| 1341 | last_pc_ = pc_; |
| 1342 | emit_rex_32(dst); |
| 1343 | emit(0xC6); |
| 1344 | emit_modrm(0x0, dst); |
| 1345 | emit(imm.value_); |
| 1346 | } |
| 1347 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1348 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1349 | void Assembler::movb(const Operand& dst, Register src) { |
| 1350 | EnsureSpace ensure_space(this); |
| 1351 | last_pc_ = pc_; |
| 1352 | emit_rex_32(src, dst); |
| 1353 | emit(0x88); |
| 1354 | emit_operand(src, dst); |
| 1355 | } |
| 1356 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1357 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1358 | void Assembler::movw(const Operand& dst, Register src) { |
| 1359 | EnsureSpace ensure_space(this); |
| 1360 | last_pc_ = pc_; |
| 1361 | emit(0x66); |
| 1362 | emit_optional_rex_32(src, dst); |
| 1363 | emit(0x89); |
| 1364 | emit_operand(src, dst); |
| 1365 | } |
| 1366 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1367 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1368 | void Assembler::movl(Register dst, const Operand& src) { |
| 1369 | EnsureSpace ensure_space(this); |
| 1370 | last_pc_ = pc_; |
| 1371 | emit_optional_rex_32(dst, src); |
| 1372 | emit(0x8B); |
| 1373 | emit_operand(dst, src); |
| 1374 | } |
| 1375 | |
| 1376 | |
| 1377 | void Assembler::movl(Register dst, Register src) { |
| 1378 | EnsureSpace ensure_space(this); |
| 1379 | last_pc_ = pc_; |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 1380 | if (src.low_bits() == 4) { |
| 1381 | emit_optional_rex_32(src, dst); |
| 1382 | emit(0x89); |
| 1383 | emit_modrm(src, dst); |
| 1384 | } else { |
| 1385 | emit_optional_rex_32(dst, src); |
| 1386 | emit(0x8B); |
| 1387 | emit_modrm(dst, src); |
| 1388 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1389 | } |
| 1390 | |
| 1391 | |
| 1392 | void Assembler::movl(const Operand& dst, Register src) { |
| 1393 | EnsureSpace ensure_space(this); |
| 1394 | last_pc_ = pc_; |
| 1395 | emit_optional_rex_32(src, dst); |
| 1396 | emit(0x89); |
| 1397 | emit_operand(src, dst); |
| 1398 | } |
| 1399 | |
| 1400 | |
| 1401 | void Assembler::movl(const Operand& dst, Immediate value) { |
| 1402 | EnsureSpace ensure_space(this); |
| 1403 | last_pc_ = pc_; |
| 1404 | emit_optional_rex_32(dst); |
| 1405 | emit(0xC7); |
| 1406 | emit_operand(0x0, dst); |
| 1407 | emit(value); // Only 32-bit immediates are possible, not 8-bit immediates. |
| 1408 | } |
| 1409 | |
| 1410 | |
| 1411 | void Assembler::movl(Register dst, Immediate value) { |
| 1412 | EnsureSpace ensure_space(this); |
| 1413 | last_pc_ = pc_; |
| 1414 | emit_optional_rex_32(dst); |
| 1415 | emit(0xC7); |
| 1416 | emit_modrm(0x0, dst); |
| 1417 | emit(value); // Only 32-bit immediates are possible, not 8-bit immediates. |
| 1418 | } |
| 1419 | |
| 1420 | |
| 1421 | void Assembler::movq(Register dst, const Operand& src) { |
| 1422 | EnsureSpace ensure_space(this); |
| 1423 | last_pc_ = pc_; |
| 1424 | emit_rex_64(dst, src); |
| 1425 | emit(0x8B); |
| 1426 | emit_operand(dst, src); |
| 1427 | } |
| 1428 | |
| 1429 | |
| 1430 | void Assembler::movq(Register dst, Register src) { |
| 1431 | EnsureSpace ensure_space(this); |
| 1432 | last_pc_ = pc_; |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 1433 | if (src.low_bits() == 4) { |
| 1434 | emit_rex_64(src, dst); |
| 1435 | emit(0x89); |
| 1436 | emit_modrm(src, dst); |
| 1437 | } else { |
| 1438 | emit_rex_64(dst, src); |
| 1439 | emit(0x8B); |
| 1440 | emit_modrm(dst, src); |
| 1441 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1442 | } |
| 1443 | |
| 1444 | |
| 1445 | void Assembler::movq(Register dst, Immediate value) { |
| 1446 | EnsureSpace ensure_space(this); |
| 1447 | last_pc_ = pc_; |
| 1448 | emit_rex_64(dst); |
| 1449 | emit(0xC7); |
| 1450 | emit_modrm(0x0, dst); |
| 1451 | emit(value); // Only 32-bit immediates are possible, not 8-bit immediates. |
| 1452 | } |
| 1453 | |
| 1454 | |
| 1455 | void Assembler::movq(const Operand& dst, Register src) { |
| 1456 | EnsureSpace ensure_space(this); |
| 1457 | last_pc_ = pc_; |
| 1458 | emit_rex_64(src, dst); |
| 1459 | emit(0x89); |
| 1460 | emit_operand(src, dst); |
| 1461 | } |
| 1462 | |
| 1463 | |
| 1464 | void Assembler::movq(Register dst, void* value, RelocInfo::Mode rmode) { |
| 1465 | // This method must not be used with heap object references. The stored |
| 1466 | // address is not GC safe. Use the handle version instead. |
| 1467 | ASSERT(rmode > RelocInfo::LAST_GCED_ENUM); |
| 1468 | EnsureSpace ensure_space(this); |
| 1469 | last_pc_ = pc_; |
| 1470 | emit_rex_64(dst); |
| 1471 | emit(0xB8 | dst.low_bits()); |
| 1472 | emitq(reinterpret_cast<uintptr_t>(value), rmode); |
| 1473 | } |
| 1474 | |
| 1475 | |
| 1476 | void Assembler::movq(Register dst, int64_t value, RelocInfo::Mode rmode) { |
| 1477 | // Non-relocatable values might not need a 64-bit representation. |
| 1478 | if (rmode == RelocInfo::NONE) { |
| 1479 | // Sadly, there is no zero or sign extending move for 8-bit immediates. |
| 1480 | if (is_int32(value)) { |
| 1481 | movq(dst, Immediate(static_cast<int32_t>(value))); |
| 1482 | return; |
| 1483 | } else if (is_uint32(value)) { |
| 1484 | movl(dst, Immediate(static_cast<int32_t>(value))); |
| 1485 | return; |
| 1486 | } |
| 1487 | // Value cannot be represented by 32 bits, so do a full 64 bit immediate |
| 1488 | // value. |
| 1489 | } |
| 1490 | EnsureSpace ensure_space(this); |
| 1491 | last_pc_ = pc_; |
| 1492 | emit_rex_64(dst); |
| 1493 | emit(0xB8 | dst.low_bits()); |
| 1494 | emitq(value, rmode); |
| 1495 | } |
| 1496 | |
| 1497 | |
| 1498 | void Assembler::movq(Register dst, ExternalReference ref) { |
| 1499 | EnsureSpace ensure_space(this); |
| 1500 | last_pc_ = pc_; |
| 1501 | emit_rex_64(dst); |
| 1502 | emit(0xB8 | dst.low_bits()); |
| 1503 | emitq(reinterpret_cast<uintptr_t>(ref.address()), |
| 1504 | RelocInfo::EXTERNAL_REFERENCE); |
| 1505 | } |
| 1506 | |
| 1507 | |
| 1508 | void Assembler::movq(const Operand& dst, Immediate value) { |
| 1509 | EnsureSpace ensure_space(this); |
| 1510 | last_pc_ = pc_; |
| 1511 | emit_rex_64(dst); |
| 1512 | emit(0xC7); |
| 1513 | emit_operand(0, dst); |
| 1514 | emit(value); |
| 1515 | } |
| 1516 | |
| 1517 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1518 | // Loads the ip-relative location of the src label into the target location |
| 1519 | // (as a 32-bit offset sign extended to 64-bit). |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1520 | void Assembler::movl(const Operand& dst, Label* src) { |
| 1521 | EnsureSpace ensure_space(this); |
| 1522 | last_pc_ = pc_; |
| 1523 | emit_optional_rex_32(dst); |
| 1524 | emit(0xC7); |
| 1525 | emit_operand(0, dst); |
| 1526 | if (src->is_bound()) { |
| 1527 | int offset = src->pos() - pc_offset() - sizeof(int32_t); |
| 1528 | ASSERT(offset <= 0); |
| 1529 | emitl(offset); |
| 1530 | } else if (src->is_linked()) { |
| 1531 | emitl(src->pos()); |
| 1532 | src->link_to(pc_offset() - sizeof(int32_t)); |
| 1533 | } else { |
| 1534 | ASSERT(src->is_unused()); |
| 1535 | int32_t current = pc_offset(); |
| 1536 | emitl(current); |
| 1537 | src->link_to(current); |
| 1538 | } |
| 1539 | } |
| 1540 | |
| 1541 | |
| 1542 | void Assembler::movq(Register dst, Handle<Object> value, RelocInfo::Mode mode) { |
| 1543 | // If there is no relocation info, emit the value of the handle efficiently |
| 1544 | // (possibly using less that 8 bytes for the value). |
| 1545 | if (mode == RelocInfo::NONE) { |
| 1546 | // There is no possible reason to store a heap pointer without relocation |
| 1547 | // info, so it must be a smi. |
| 1548 | ASSERT(value->IsSmi()); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1549 | movq(dst, reinterpret_cast<int64_t>(*value), RelocInfo::NONE); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1550 | } else { |
| 1551 | EnsureSpace ensure_space(this); |
| 1552 | last_pc_ = pc_; |
| 1553 | ASSERT(value->IsHeapObject()); |
| 1554 | ASSERT(!Heap::InNewSpace(*value)); |
| 1555 | emit_rex_64(dst); |
| 1556 | emit(0xB8 | dst.low_bits()); |
| 1557 | emitq(reinterpret_cast<uintptr_t>(value.location()), mode); |
| 1558 | } |
| 1559 | } |
| 1560 | |
| 1561 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1562 | void Assembler::movsxbq(Register dst, const Operand& src) { |
| 1563 | EnsureSpace ensure_space(this); |
| 1564 | last_pc_ = pc_; |
| 1565 | emit_rex_32(dst, src); |
| 1566 | emit(0x0F); |
| 1567 | emit(0xBE); |
| 1568 | emit_operand(dst, src); |
| 1569 | } |
| 1570 | |
| 1571 | |
| 1572 | void Assembler::movsxwq(Register dst, const Operand& src) { |
| 1573 | EnsureSpace ensure_space(this); |
| 1574 | last_pc_ = pc_; |
| 1575 | emit_rex_64(dst, src); |
| 1576 | emit(0x0F); |
| 1577 | emit(0xBF); |
| 1578 | emit_operand(dst, src); |
| 1579 | } |
| 1580 | |
| 1581 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1582 | void Assembler::movsxlq(Register dst, Register src) { |
| 1583 | EnsureSpace ensure_space(this); |
| 1584 | last_pc_ = pc_; |
| 1585 | emit_rex_64(dst, src); |
| 1586 | emit(0x63); |
| 1587 | emit_modrm(dst, src); |
| 1588 | } |
| 1589 | |
| 1590 | |
| 1591 | void Assembler::movsxlq(Register dst, const Operand& src) { |
| 1592 | EnsureSpace ensure_space(this); |
| 1593 | last_pc_ = pc_; |
| 1594 | emit_rex_64(dst, src); |
| 1595 | emit(0x63); |
| 1596 | emit_operand(dst, src); |
| 1597 | } |
| 1598 | |
| 1599 | |
| 1600 | void Assembler::movzxbq(Register dst, const Operand& src) { |
| 1601 | EnsureSpace ensure_space(this); |
| 1602 | last_pc_ = pc_; |
| 1603 | emit_rex_64(dst, src); |
| 1604 | emit(0x0F); |
| 1605 | emit(0xB6); |
| 1606 | emit_operand(dst, src); |
| 1607 | } |
| 1608 | |
| 1609 | |
| 1610 | void Assembler::movzxbl(Register dst, const Operand& src) { |
| 1611 | EnsureSpace ensure_space(this); |
| 1612 | last_pc_ = pc_; |
| 1613 | emit_optional_rex_32(dst, src); |
| 1614 | emit(0x0F); |
| 1615 | emit(0xB6); |
| 1616 | emit_operand(dst, src); |
| 1617 | } |
| 1618 | |
| 1619 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1620 | void Assembler::movzxwq(Register dst, const Operand& src) { |
| 1621 | EnsureSpace ensure_space(this); |
| 1622 | last_pc_ = pc_; |
| 1623 | emit_rex_64(dst, src); |
| 1624 | emit(0x0F); |
| 1625 | emit(0xB7); |
| 1626 | emit_operand(dst, src); |
| 1627 | } |
| 1628 | |
| 1629 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1630 | void Assembler::movzxwl(Register dst, const Operand& src) { |
| 1631 | EnsureSpace ensure_space(this); |
| 1632 | last_pc_ = pc_; |
| 1633 | emit_optional_rex_32(dst, src); |
| 1634 | emit(0x0F); |
| 1635 | emit(0xB7); |
| 1636 | emit_operand(dst, src); |
| 1637 | } |
| 1638 | |
| 1639 | |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 1640 | void Assembler::repmovsb() { |
| 1641 | EnsureSpace ensure_space(this); |
| 1642 | last_pc_ = pc_; |
| 1643 | emit(0xF3); |
| 1644 | emit(0xA4); |
| 1645 | } |
| 1646 | |
| 1647 | |
| 1648 | void Assembler::repmovsw() { |
| 1649 | EnsureSpace ensure_space(this); |
| 1650 | last_pc_ = pc_; |
| 1651 | emit(0x66); // Operand size override. |
| 1652 | emit(0xF3); |
| 1653 | emit(0xA4); |
| 1654 | } |
| 1655 | |
| 1656 | |
| 1657 | void Assembler::repmovsl() { |
| 1658 | EnsureSpace ensure_space(this); |
| 1659 | last_pc_ = pc_; |
| 1660 | emit(0xF3); |
| 1661 | emit(0xA5); |
| 1662 | } |
| 1663 | |
| 1664 | |
| 1665 | void Assembler::repmovsq() { |
| 1666 | EnsureSpace ensure_space(this); |
| 1667 | last_pc_ = pc_; |
| 1668 | emit(0xF3); |
| 1669 | emit_rex_64(); |
| 1670 | emit(0xA5); |
| 1671 | } |
| 1672 | |
| 1673 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1674 | void Assembler::mul(Register src) { |
| 1675 | EnsureSpace ensure_space(this); |
| 1676 | last_pc_ = pc_; |
| 1677 | emit_rex_64(src); |
| 1678 | emit(0xF7); |
| 1679 | emit_modrm(0x4, src); |
| 1680 | } |
| 1681 | |
| 1682 | |
| 1683 | void Assembler::neg(Register dst) { |
| 1684 | EnsureSpace ensure_space(this); |
| 1685 | last_pc_ = pc_; |
| 1686 | emit_rex_64(dst); |
| 1687 | emit(0xF7); |
| 1688 | emit_modrm(0x3, dst); |
| 1689 | } |
| 1690 | |
| 1691 | |
| 1692 | void Assembler::negl(Register dst) { |
| 1693 | EnsureSpace ensure_space(this); |
| 1694 | last_pc_ = pc_; |
| 1695 | emit_optional_rex_32(dst); |
| 1696 | emit(0xF7); |
| 1697 | emit_modrm(0x3, dst); |
| 1698 | } |
| 1699 | |
| 1700 | |
| 1701 | void Assembler::neg(const Operand& dst) { |
| 1702 | EnsureSpace ensure_space(this); |
| 1703 | last_pc_ = pc_; |
| 1704 | emit_rex_64(dst); |
| 1705 | emit(0xF7); |
| 1706 | emit_operand(3, dst); |
| 1707 | } |
| 1708 | |
| 1709 | |
| 1710 | void Assembler::nop() { |
| 1711 | EnsureSpace ensure_space(this); |
| 1712 | last_pc_ = pc_; |
| 1713 | emit(0x90); |
| 1714 | } |
| 1715 | |
| 1716 | |
| 1717 | void Assembler::not_(Register dst) { |
| 1718 | EnsureSpace ensure_space(this); |
| 1719 | last_pc_ = pc_; |
| 1720 | emit_rex_64(dst); |
| 1721 | emit(0xF7); |
| 1722 | emit_modrm(0x2, dst); |
| 1723 | } |
| 1724 | |
| 1725 | |
| 1726 | void Assembler::not_(const Operand& dst) { |
| 1727 | EnsureSpace ensure_space(this); |
| 1728 | last_pc_ = pc_; |
| 1729 | emit_rex_64(dst); |
| 1730 | emit(0xF7); |
| 1731 | emit_operand(2, dst); |
| 1732 | } |
| 1733 | |
| 1734 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1735 | void Assembler::notl(Register dst) { |
| 1736 | EnsureSpace ensure_space(this); |
| 1737 | last_pc_ = pc_; |
| 1738 | emit_optional_rex_32(dst); |
| 1739 | emit(0xF7); |
| 1740 | emit_modrm(0x2, dst); |
| 1741 | } |
| 1742 | |
| 1743 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1744 | void Assembler::nop(int n) { |
| 1745 | // The recommended muti-byte sequences of NOP instructions from the Intel 64 |
| 1746 | // and IA-32 Architectures Software Developer's Manual. |
| 1747 | // |
| 1748 | // Length Assembly Byte Sequence |
| 1749 | // 2 bytes 66 NOP 66 90H |
| 1750 | // 3 bytes NOP DWORD ptr [EAX] 0F 1F 00H |
| 1751 | // 4 bytes NOP DWORD ptr [EAX + 00H] 0F 1F 40 00H |
| 1752 | // 5 bytes NOP DWORD ptr [EAX + EAX*1 + 00H] 0F 1F 44 00 00H |
| 1753 | // 6 bytes 66 NOP DWORD ptr [EAX + EAX*1 + 00H] 66 0F 1F 44 00 00H |
| 1754 | // 7 bytes NOP DWORD ptr [EAX + 00000000H] 0F 1F 80 00 00 00 00H |
| 1755 | // 8 bytes NOP DWORD ptr [EAX + EAX*1 + 00000000H] 0F 1F 84 00 00 00 00 00H |
| 1756 | // 9 bytes 66 NOP DWORD ptr [EAX + EAX*1 + 66 0F 1F 84 00 00 00 00 |
| 1757 | // 00000000H] 00H |
| 1758 | |
| 1759 | ASSERT(1 <= n); |
| 1760 | ASSERT(n <= 9); |
| 1761 | EnsureSpace ensure_space(this); |
| 1762 | last_pc_ = pc_; |
| 1763 | switch (n) { |
| 1764 | case 1: |
| 1765 | emit(0x90); |
| 1766 | return; |
| 1767 | case 2: |
| 1768 | emit(0x66); |
| 1769 | emit(0x90); |
| 1770 | return; |
| 1771 | case 3: |
| 1772 | emit(0x0f); |
| 1773 | emit(0x1f); |
| 1774 | emit(0x00); |
| 1775 | return; |
| 1776 | case 4: |
| 1777 | emit(0x0f); |
| 1778 | emit(0x1f); |
| 1779 | emit(0x40); |
| 1780 | emit(0x00); |
| 1781 | return; |
| 1782 | case 5: |
| 1783 | emit(0x0f); |
| 1784 | emit(0x1f); |
| 1785 | emit(0x44); |
| 1786 | emit(0x00); |
| 1787 | emit(0x00); |
| 1788 | return; |
| 1789 | case 6: |
| 1790 | emit(0x66); |
| 1791 | emit(0x0f); |
| 1792 | emit(0x1f); |
| 1793 | emit(0x44); |
| 1794 | emit(0x00); |
| 1795 | emit(0x00); |
| 1796 | return; |
| 1797 | case 7: |
| 1798 | emit(0x0f); |
| 1799 | emit(0x1f); |
| 1800 | emit(0x80); |
| 1801 | emit(0x00); |
| 1802 | emit(0x00); |
| 1803 | emit(0x00); |
| 1804 | emit(0x00); |
| 1805 | return; |
| 1806 | case 8: |
| 1807 | emit(0x0f); |
| 1808 | emit(0x1f); |
| 1809 | emit(0x84); |
| 1810 | emit(0x00); |
| 1811 | emit(0x00); |
| 1812 | emit(0x00); |
| 1813 | emit(0x00); |
| 1814 | emit(0x00); |
| 1815 | return; |
| 1816 | case 9: |
| 1817 | emit(0x66); |
| 1818 | emit(0x0f); |
| 1819 | emit(0x1f); |
| 1820 | emit(0x84); |
| 1821 | emit(0x00); |
| 1822 | emit(0x00); |
| 1823 | emit(0x00); |
| 1824 | emit(0x00); |
| 1825 | emit(0x00); |
| 1826 | return; |
| 1827 | } |
| 1828 | } |
| 1829 | |
| 1830 | |
| 1831 | void Assembler::pop(Register dst) { |
| 1832 | EnsureSpace ensure_space(this); |
| 1833 | last_pc_ = pc_; |
| 1834 | if (dst.high_bit()) { |
| 1835 | emit_rex_64(dst); |
| 1836 | } |
| 1837 | emit(0x58 | dst.low_bits()); |
| 1838 | } |
| 1839 | |
| 1840 | |
| 1841 | void Assembler::pop(const Operand& dst) { |
| 1842 | EnsureSpace ensure_space(this); |
| 1843 | last_pc_ = pc_; |
| 1844 | emit_rex_64(dst); // Could be omitted in some cases. |
| 1845 | emit(0x8F); |
| 1846 | emit_operand(0, dst); |
| 1847 | } |
| 1848 | |
| 1849 | |
| 1850 | void Assembler::popfq() { |
| 1851 | EnsureSpace ensure_space(this); |
| 1852 | last_pc_ = pc_; |
| 1853 | emit(0x9D); |
| 1854 | } |
| 1855 | |
| 1856 | |
| 1857 | void Assembler::push(Register src) { |
| 1858 | EnsureSpace ensure_space(this); |
| 1859 | last_pc_ = pc_; |
| 1860 | if (src.high_bit()) { |
| 1861 | emit_rex_64(src); |
| 1862 | } |
| 1863 | emit(0x50 | src.low_bits()); |
| 1864 | } |
| 1865 | |
| 1866 | |
| 1867 | void Assembler::push(const Operand& src) { |
| 1868 | EnsureSpace ensure_space(this); |
| 1869 | last_pc_ = pc_; |
| 1870 | emit_rex_64(src); // Could be omitted in some cases. |
| 1871 | emit(0xFF); |
| 1872 | emit_operand(6, src); |
| 1873 | } |
| 1874 | |
| 1875 | |
| 1876 | void Assembler::push(Immediate value) { |
| 1877 | EnsureSpace ensure_space(this); |
| 1878 | last_pc_ = pc_; |
| 1879 | if (is_int8(value.value_)) { |
| 1880 | emit(0x6A); |
| 1881 | emit(value.value_); // Emit low byte of value. |
| 1882 | } else { |
| 1883 | emit(0x68); |
| 1884 | emitl(value.value_); |
| 1885 | } |
| 1886 | } |
| 1887 | |
| 1888 | |
| 1889 | void Assembler::pushfq() { |
| 1890 | EnsureSpace ensure_space(this); |
| 1891 | last_pc_ = pc_; |
| 1892 | emit(0x9C); |
| 1893 | } |
| 1894 | |
| 1895 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1896 | void Assembler::rdtsc() { |
| 1897 | EnsureSpace ensure_space(this); |
| 1898 | last_pc_ = pc_; |
| 1899 | emit(0x0F); |
| 1900 | emit(0x31); |
| 1901 | } |
| 1902 | |
| 1903 | |
| 1904 | void Assembler::ret(int imm16) { |
| 1905 | EnsureSpace ensure_space(this); |
| 1906 | last_pc_ = pc_; |
| 1907 | ASSERT(is_uint16(imm16)); |
| 1908 | if (imm16 == 0) { |
| 1909 | emit(0xC3); |
| 1910 | } else { |
| 1911 | emit(0xC2); |
| 1912 | emit(imm16 & 0xFF); |
| 1913 | emit((imm16 >> 8) & 0xFF); |
| 1914 | } |
| 1915 | } |
| 1916 | |
| 1917 | |
| 1918 | void Assembler::setcc(Condition cc, Register reg) { |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1919 | if (cc > last_condition) { |
| 1920 | movb(reg, Immediate(cc == always ? 1 : 0)); |
| 1921 | return; |
| 1922 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1923 | EnsureSpace ensure_space(this); |
| 1924 | last_pc_ = pc_; |
| 1925 | ASSERT(is_uint4(cc)); |
| 1926 | if (reg.code() > 3) { // Use x64 byte registers, where different. |
| 1927 | emit_rex_32(reg); |
| 1928 | } |
| 1929 | emit(0x0F); |
| 1930 | emit(0x90 | cc); |
| 1931 | emit_modrm(0x0, reg); |
| 1932 | } |
| 1933 | |
| 1934 | |
| 1935 | void Assembler::shld(Register dst, Register src) { |
| 1936 | EnsureSpace ensure_space(this); |
| 1937 | last_pc_ = pc_; |
| 1938 | emit_rex_64(src, dst); |
| 1939 | emit(0x0F); |
| 1940 | emit(0xA5); |
| 1941 | emit_modrm(src, dst); |
| 1942 | } |
| 1943 | |
| 1944 | |
| 1945 | void Assembler::shrd(Register dst, Register src) { |
| 1946 | EnsureSpace ensure_space(this); |
| 1947 | last_pc_ = pc_; |
| 1948 | emit_rex_64(src, dst); |
| 1949 | emit(0x0F); |
| 1950 | emit(0xAD); |
| 1951 | emit_modrm(src, dst); |
| 1952 | } |
| 1953 | |
| 1954 | |
| 1955 | void Assembler::xchg(Register dst, Register src) { |
| 1956 | EnsureSpace ensure_space(this); |
| 1957 | last_pc_ = pc_; |
| 1958 | if (src.is(rax) || dst.is(rax)) { // Single-byte encoding |
| 1959 | Register other = src.is(rax) ? dst : src; |
| 1960 | emit_rex_64(other); |
| 1961 | emit(0x90 | other.low_bits()); |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 1962 | } else if (dst.low_bits() == 4) { |
| 1963 | emit_rex_64(dst, src); |
| 1964 | emit(0x87); |
| 1965 | emit_modrm(dst, src); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1966 | } else { |
| 1967 | emit_rex_64(src, dst); |
| 1968 | emit(0x87); |
| 1969 | emit_modrm(src, dst); |
| 1970 | } |
| 1971 | } |
| 1972 | |
| 1973 | |
| 1974 | void Assembler::store_rax(void* dst, RelocInfo::Mode mode) { |
| 1975 | EnsureSpace ensure_space(this); |
| 1976 | last_pc_ = pc_; |
| 1977 | emit(0x48); // REX.W |
| 1978 | emit(0xA3); |
| 1979 | emitq(reinterpret_cast<uintptr_t>(dst), mode); |
| 1980 | } |
| 1981 | |
| 1982 | |
| 1983 | void Assembler::store_rax(ExternalReference ref) { |
| 1984 | store_rax(ref.address(), RelocInfo::EXTERNAL_REFERENCE); |
| 1985 | } |
| 1986 | |
| 1987 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1988 | void Assembler::testb(Register dst, Register src) { |
| 1989 | EnsureSpace ensure_space(this); |
| 1990 | last_pc_ = pc_; |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 1991 | if (src.low_bits() == 4) { |
| 1992 | emit_rex_32(src, dst); |
| 1993 | emit(0x84); |
| 1994 | emit_modrm(src, dst); |
| 1995 | } else { |
| 1996 | if (dst.code() > 3 || src.code() > 3) { |
| 1997 | // Register is not one of al, bl, cl, dl. Its encoding needs REX. |
| 1998 | emit_rex_32(dst, src); |
| 1999 | } |
| 2000 | emit(0x84); |
| 2001 | emit_modrm(dst, src); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 2002 | } |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 2003 | } |
| 2004 | |
| 2005 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2006 | void Assembler::testb(Register reg, Immediate mask) { |
| 2007 | ASSERT(is_int8(mask.value_) || is_uint8(mask.value_)); |
| 2008 | EnsureSpace ensure_space(this); |
| 2009 | last_pc_ = pc_; |
| 2010 | if (reg.is(rax)) { |
| 2011 | emit(0xA8); |
| 2012 | emit(mask.value_); // Low byte emitted. |
| 2013 | } else { |
| 2014 | if (reg.code() > 3) { |
| 2015 | // Register is not one of al, bl, cl, dl. Its encoding needs REX. |
| 2016 | emit_rex_32(reg); |
| 2017 | } |
| 2018 | emit(0xF6); |
| 2019 | emit_modrm(0x0, reg); |
| 2020 | emit(mask.value_); // Low byte emitted. |
| 2021 | } |
| 2022 | } |
| 2023 | |
| 2024 | |
| 2025 | void Assembler::testb(const Operand& op, Immediate mask) { |
| 2026 | ASSERT(is_int8(mask.value_) || is_uint8(mask.value_)); |
| 2027 | EnsureSpace ensure_space(this); |
| 2028 | last_pc_ = pc_; |
| 2029 | emit_optional_rex_32(rax, op); |
| 2030 | emit(0xF6); |
| 2031 | emit_operand(rax, op); // Operation code 0 |
| 2032 | emit(mask.value_); // Low byte emitted. |
| 2033 | } |
| 2034 | |
| 2035 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2036 | void Assembler::testb(const Operand& op, Register reg) { |
| 2037 | EnsureSpace ensure_space(this); |
| 2038 | last_pc_ = pc_; |
| 2039 | if (reg.code() > 3) { |
| 2040 | // Register is not one of al, bl, cl, dl. Its encoding needs REX. |
| 2041 | emit_rex_32(reg, op); |
| 2042 | } else { |
| 2043 | emit_optional_rex_32(reg, op); |
| 2044 | } |
| 2045 | emit(0x84); |
| 2046 | emit_operand(reg, op); |
| 2047 | } |
| 2048 | |
| 2049 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2050 | void Assembler::testl(Register dst, Register src) { |
| 2051 | EnsureSpace ensure_space(this); |
| 2052 | last_pc_ = pc_; |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 2053 | if (src.low_bits() == 4) { |
| 2054 | emit_optional_rex_32(src, dst); |
| 2055 | emit(0x85); |
| 2056 | emit_modrm(src, dst); |
| 2057 | } else { |
| 2058 | emit_optional_rex_32(dst, src); |
| 2059 | emit(0x85); |
| 2060 | emit_modrm(dst, src); |
| 2061 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2062 | } |
| 2063 | |
| 2064 | |
| 2065 | void Assembler::testl(Register reg, Immediate mask) { |
| 2066 | // testl with a mask that fits in the low byte is exactly testb. |
| 2067 | if (is_uint8(mask.value_)) { |
| 2068 | testb(reg, mask); |
| 2069 | return; |
| 2070 | } |
| 2071 | EnsureSpace ensure_space(this); |
| 2072 | last_pc_ = pc_; |
| 2073 | if (reg.is(rax)) { |
| 2074 | emit(0xA9); |
| 2075 | emit(mask); |
| 2076 | } else { |
| 2077 | emit_optional_rex_32(rax, reg); |
| 2078 | emit(0xF7); |
| 2079 | emit_modrm(0x0, reg); |
| 2080 | emit(mask); |
| 2081 | } |
| 2082 | } |
| 2083 | |
| 2084 | |
| 2085 | void Assembler::testl(const Operand& op, Immediate mask) { |
| 2086 | // testl with a mask that fits in the low byte is exactly testb. |
| 2087 | if (is_uint8(mask.value_)) { |
| 2088 | testb(op, mask); |
| 2089 | return; |
| 2090 | } |
| 2091 | EnsureSpace ensure_space(this); |
| 2092 | last_pc_ = pc_; |
| 2093 | emit_optional_rex_32(rax, op); |
| 2094 | emit(0xF7); |
| 2095 | emit_operand(rax, op); // Operation code 0 |
| 2096 | emit(mask); |
| 2097 | } |
| 2098 | |
| 2099 | |
| 2100 | void Assembler::testq(const Operand& op, Register reg) { |
| 2101 | EnsureSpace ensure_space(this); |
| 2102 | last_pc_ = pc_; |
| 2103 | emit_rex_64(reg, op); |
| 2104 | emit(0x85); |
| 2105 | emit_operand(reg, op); |
| 2106 | } |
| 2107 | |
| 2108 | |
| 2109 | void Assembler::testq(Register dst, Register src) { |
| 2110 | EnsureSpace ensure_space(this); |
| 2111 | last_pc_ = pc_; |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 2112 | if (src.low_bits() == 4) { |
| 2113 | emit_rex_64(src, dst); |
| 2114 | emit(0x85); |
| 2115 | emit_modrm(src, dst); |
| 2116 | } else { |
| 2117 | emit_rex_64(dst, src); |
| 2118 | emit(0x85); |
| 2119 | emit_modrm(dst, src); |
| 2120 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2121 | } |
| 2122 | |
| 2123 | |
| 2124 | void Assembler::testq(Register dst, Immediate mask) { |
| 2125 | EnsureSpace ensure_space(this); |
| 2126 | last_pc_ = pc_; |
| 2127 | if (dst.is(rax)) { |
| 2128 | emit_rex_64(); |
| 2129 | emit(0xA9); |
| 2130 | emit(mask); |
| 2131 | } else { |
| 2132 | emit_rex_64(dst); |
| 2133 | emit(0xF7); |
| 2134 | emit_modrm(0, dst); |
| 2135 | emit(mask); |
| 2136 | } |
| 2137 | } |
| 2138 | |
| 2139 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2140 | // FPU instructions. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2141 | |
| 2142 | |
| 2143 | void Assembler::fld(int i) { |
| 2144 | EnsureSpace ensure_space(this); |
| 2145 | last_pc_ = pc_; |
| 2146 | emit_farith(0xD9, 0xC0, i); |
| 2147 | } |
| 2148 | |
| 2149 | |
| 2150 | void Assembler::fld1() { |
| 2151 | EnsureSpace ensure_space(this); |
| 2152 | last_pc_ = pc_; |
| 2153 | emit(0xD9); |
| 2154 | emit(0xE8); |
| 2155 | } |
| 2156 | |
| 2157 | |
| 2158 | void Assembler::fldz() { |
| 2159 | EnsureSpace ensure_space(this); |
| 2160 | last_pc_ = pc_; |
| 2161 | emit(0xD9); |
| 2162 | emit(0xEE); |
| 2163 | } |
| 2164 | |
| 2165 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2166 | void Assembler::fldpi() { |
| 2167 | EnsureSpace ensure_space(this); |
| 2168 | last_pc_ = pc_; |
| 2169 | emit(0xD9); |
| 2170 | emit(0xEB); |
| 2171 | } |
| 2172 | |
| 2173 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2174 | void Assembler::fld_s(const Operand& adr) { |
| 2175 | EnsureSpace ensure_space(this); |
| 2176 | last_pc_ = pc_; |
| 2177 | emit_optional_rex_32(adr); |
| 2178 | emit(0xD9); |
| 2179 | emit_operand(0, adr); |
| 2180 | } |
| 2181 | |
| 2182 | |
| 2183 | void Assembler::fld_d(const Operand& adr) { |
| 2184 | EnsureSpace ensure_space(this); |
| 2185 | last_pc_ = pc_; |
| 2186 | emit_optional_rex_32(adr); |
| 2187 | emit(0xDD); |
| 2188 | emit_operand(0, adr); |
| 2189 | } |
| 2190 | |
| 2191 | |
| 2192 | void Assembler::fstp_s(const Operand& adr) { |
| 2193 | EnsureSpace ensure_space(this); |
| 2194 | last_pc_ = pc_; |
| 2195 | emit_optional_rex_32(adr); |
| 2196 | emit(0xD9); |
| 2197 | emit_operand(3, adr); |
| 2198 | } |
| 2199 | |
| 2200 | |
| 2201 | void Assembler::fstp_d(const Operand& adr) { |
| 2202 | EnsureSpace ensure_space(this); |
| 2203 | last_pc_ = pc_; |
| 2204 | emit_optional_rex_32(adr); |
| 2205 | emit(0xDD); |
| 2206 | emit_operand(3, adr); |
| 2207 | } |
| 2208 | |
| 2209 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 2210 | void Assembler::fstp(int index) { |
| 2211 | ASSERT(is_uint3(index)); |
| 2212 | EnsureSpace ensure_space(this); |
| 2213 | last_pc_ = pc_; |
| 2214 | emit_farith(0xDD, 0xD8, index); |
| 2215 | } |
| 2216 | |
| 2217 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2218 | void Assembler::fild_s(const Operand& adr) { |
| 2219 | EnsureSpace ensure_space(this); |
| 2220 | last_pc_ = pc_; |
| 2221 | emit_optional_rex_32(adr); |
| 2222 | emit(0xDB); |
| 2223 | emit_operand(0, adr); |
| 2224 | } |
| 2225 | |
| 2226 | |
| 2227 | void Assembler::fild_d(const Operand& adr) { |
| 2228 | EnsureSpace ensure_space(this); |
| 2229 | last_pc_ = pc_; |
| 2230 | emit_optional_rex_32(adr); |
| 2231 | emit(0xDF); |
| 2232 | emit_operand(5, adr); |
| 2233 | } |
| 2234 | |
| 2235 | |
| 2236 | void Assembler::fistp_s(const Operand& adr) { |
| 2237 | EnsureSpace ensure_space(this); |
| 2238 | last_pc_ = pc_; |
| 2239 | emit_optional_rex_32(adr); |
| 2240 | emit(0xDB); |
| 2241 | emit_operand(3, adr); |
| 2242 | } |
| 2243 | |
| 2244 | |
| 2245 | void Assembler::fisttp_s(const Operand& adr) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2246 | ASSERT(CpuFeatures::IsEnabled(SSE3)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2247 | EnsureSpace ensure_space(this); |
| 2248 | last_pc_ = pc_; |
| 2249 | emit_optional_rex_32(adr); |
| 2250 | emit(0xDB); |
| 2251 | emit_operand(1, adr); |
| 2252 | } |
| 2253 | |
| 2254 | |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 2255 | void Assembler::fisttp_d(const Operand& adr) { |
| 2256 | ASSERT(CpuFeatures::IsEnabled(SSE3)); |
| 2257 | EnsureSpace ensure_space(this); |
| 2258 | last_pc_ = pc_; |
| 2259 | emit_optional_rex_32(adr); |
| 2260 | emit(0xDD); |
| 2261 | emit_operand(1, adr); |
| 2262 | } |
| 2263 | |
| 2264 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2265 | void Assembler::fist_s(const Operand& adr) { |
| 2266 | EnsureSpace ensure_space(this); |
| 2267 | last_pc_ = pc_; |
| 2268 | emit_optional_rex_32(adr); |
| 2269 | emit(0xDB); |
| 2270 | emit_operand(2, adr); |
| 2271 | } |
| 2272 | |
| 2273 | |
| 2274 | void Assembler::fistp_d(const Operand& adr) { |
| 2275 | EnsureSpace ensure_space(this); |
| 2276 | last_pc_ = pc_; |
| 2277 | emit_optional_rex_32(adr); |
| 2278 | emit(0xDF); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 2279 | emit_operand(7, adr); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2280 | } |
| 2281 | |
| 2282 | |
| 2283 | void Assembler::fabs() { |
| 2284 | EnsureSpace ensure_space(this); |
| 2285 | last_pc_ = pc_; |
| 2286 | emit(0xD9); |
| 2287 | emit(0xE1); |
| 2288 | } |
| 2289 | |
| 2290 | |
| 2291 | void Assembler::fchs() { |
| 2292 | EnsureSpace ensure_space(this); |
| 2293 | last_pc_ = pc_; |
| 2294 | emit(0xD9); |
| 2295 | emit(0xE0); |
| 2296 | } |
| 2297 | |
| 2298 | |
| 2299 | void Assembler::fcos() { |
| 2300 | EnsureSpace ensure_space(this); |
| 2301 | last_pc_ = pc_; |
| 2302 | emit(0xD9); |
| 2303 | emit(0xFF); |
| 2304 | } |
| 2305 | |
| 2306 | |
| 2307 | void Assembler::fsin() { |
| 2308 | EnsureSpace ensure_space(this); |
| 2309 | last_pc_ = pc_; |
| 2310 | emit(0xD9); |
| 2311 | emit(0xFE); |
| 2312 | } |
| 2313 | |
| 2314 | |
| 2315 | void Assembler::fadd(int i) { |
| 2316 | EnsureSpace ensure_space(this); |
| 2317 | last_pc_ = pc_; |
| 2318 | emit_farith(0xDC, 0xC0, i); |
| 2319 | } |
| 2320 | |
| 2321 | |
| 2322 | void Assembler::fsub(int i) { |
| 2323 | EnsureSpace ensure_space(this); |
| 2324 | last_pc_ = pc_; |
| 2325 | emit_farith(0xDC, 0xE8, i); |
| 2326 | } |
| 2327 | |
| 2328 | |
| 2329 | void Assembler::fisub_s(const Operand& adr) { |
| 2330 | EnsureSpace ensure_space(this); |
| 2331 | last_pc_ = pc_; |
| 2332 | emit_optional_rex_32(adr); |
| 2333 | emit(0xDA); |
| 2334 | emit_operand(4, adr); |
| 2335 | } |
| 2336 | |
| 2337 | |
| 2338 | void Assembler::fmul(int i) { |
| 2339 | EnsureSpace ensure_space(this); |
| 2340 | last_pc_ = pc_; |
| 2341 | emit_farith(0xDC, 0xC8, i); |
| 2342 | } |
| 2343 | |
| 2344 | |
| 2345 | void Assembler::fdiv(int i) { |
| 2346 | EnsureSpace ensure_space(this); |
| 2347 | last_pc_ = pc_; |
| 2348 | emit_farith(0xDC, 0xF8, i); |
| 2349 | } |
| 2350 | |
| 2351 | |
| 2352 | void Assembler::faddp(int i) { |
| 2353 | EnsureSpace ensure_space(this); |
| 2354 | last_pc_ = pc_; |
| 2355 | emit_farith(0xDE, 0xC0, i); |
| 2356 | } |
| 2357 | |
| 2358 | |
| 2359 | void Assembler::fsubp(int i) { |
| 2360 | EnsureSpace ensure_space(this); |
| 2361 | last_pc_ = pc_; |
| 2362 | emit_farith(0xDE, 0xE8, i); |
| 2363 | } |
| 2364 | |
| 2365 | |
| 2366 | void Assembler::fsubrp(int i) { |
| 2367 | EnsureSpace ensure_space(this); |
| 2368 | last_pc_ = pc_; |
| 2369 | emit_farith(0xDE, 0xE0, i); |
| 2370 | } |
| 2371 | |
| 2372 | |
| 2373 | void Assembler::fmulp(int i) { |
| 2374 | EnsureSpace ensure_space(this); |
| 2375 | last_pc_ = pc_; |
| 2376 | emit_farith(0xDE, 0xC8, i); |
| 2377 | } |
| 2378 | |
| 2379 | |
| 2380 | void Assembler::fdivp(int i) { |
| 2381 | EnsureSpace ensure_space(this); |
| 2382 | last_pc_ = pc_; |
| 2383 | emit_farith(0xDE, 0xF8, i); |
| 2384 | } |
| 2385 | |
| 2386 | |
| 2387 | void Assembler::fprem() { |
| 2388 | EnsureSpace ensure_space(this); |
| 2389 | last_pc_ = pc_; |
| 2390 | emit(0xD9); |
| 2391 | emit(0xF8); |
| 2392 | } |
| 2393 | |
| 2394 | |
| 2395 | void Assembler::fprem1() { |
| 2396 | EnsureSpace ensure_space(this); |
| 2397 | last_pc_ = pc_; |
| 2398 | emit(0xD9); |
| 2399 | emit(0xF5); |
| 2400 | } |
| 2401 | |
| 2402 | |
| 2403 | void Assembler::fxch(int i) { |
| 2404 | EnsureSpace ensure_space(this); |
| 2405 | last_pc_ = pc_; |
| 2406 | emit_farith(0xD9, 0xC8, i); |
| 2407 | } |
| 2408 | |
| 2409 | |
| 2410 | void Assembler::fincstp() { |
| 2411 | EnsureSpace ensure_space(this); |
| 2412 | last_pc_ = pc_; |
| 2413 | emit(0xD9); |
| 2414 | emit(0xF7); |
| 2415 | } |
| 2416 | |
| 2417 | |
| 2418 | void Assembler::ffree(int i) { |
| 2419 | EnsureSpace ensure_space(this); |
| 2420 | last_pc_ = pc_; |
| 2421 | emit_farith(0xDD, 0xC0, i); |
| 2422 | } |
| 2423 | |
| 2424 | |
| 2425 | void Assembler::ftst() { |
| 2426 | EnsureSpace ensure_space(this); |
| 2427 | last_pc_ = pc_; |
| 2428 | emit(0xD9); |
| 2429 | emit(0xE4); |
| 2430 | } |
| 2431 | |
| 2432 | |
| 2433 | void Assembler::fucomp(int i) { |
| 2434 | EnsureSpace ensure_space(this); |
| 2435 | last_pc_ = pc_; |
| 2436 | emit_farith(0xDD, 0xE8, i); |
| 2437 | } |
| 2438 | |
| 2439 | |
| 2440 | void Assembler::fucompp() { |
| 2441 | EnsureSpace ensure_space(this); |
| 2442 | last_pc_ = pc_; |
| 2443 | emit(0xDA); |
| 2444 | emit(0xE9); |
| 2445 | } |
| 2446 | |
| 2447 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 2448 | void Assembler::fucomi(int i) { |
| 2449 | EnsureSpace ensure_space(this); |
| 2450 | last_pc_ = pc_; |
| 2451 | emit(0xDB); |
| 2452 | emit(0xE8 + i); |
| 2453 | } |
| 2454 | |
| 2455 | |
| 2456 | void Assembler::fucomip() { |
| 2457 | EnsureSpace ensure_space(this); |
| 2458 | last_pc_ = pc_; |
| 2459 | emit(0xDF); |
| 2460 | emit(0xE9); |
| 2461 | } |
| 2462 | |
| 2463 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2464 | void Assembler::fcompp() { |
| 2465 | EnsureSpace ensure_space(this); |
| 2466 | last_pc_ = pc_; |
| 2467 | emit(0xDE); |
| 2468 | emit(0xD9); |
| 2469 | } |
| 2470 | |
| 2471 | |
| 2472 | void Assembler::fnstsw_ax() { |
| 2473 | EnsureSpace ensure_space(this); |
| 2474 | last_pc_ = pc_; |
| 2475 | emit(0xDF); |
| 2476 | emit(0xE0); |
| 2477 | } |
| 2478 | |
| 2479 | |
| 2480 | void Assembler::fwait() { |
| 2481 | EnsureSpace ensure_space(this); |
| 2482 | last_pc_ = pc_; |
| 2483 | emit(0x9B); |
| 2484 | } |
| 2485 | |
| 2486 | |
| 2487 | void Assembler::frndint() { |
| 2488 | EnsureSpace ensure_space(this); |
| 2489 | last_pc_ = pc_; |
| 2490 | emit(0xD9); |
| 2491 | emit(0xFC); |
| 2492 | } |
| 2493 | |
| 2494 | |
| 2495 | void Assembler::fnclex() { |
| 2496 | EnsureSpace ensure_space(this); |
| 2497 | last_pc_ = pc_; |
| 2498 | emit(0xDB); |
| 2499 | emit(0xE2); |
| 2500 | } |
| 2501 | |
| 2502 | |
| 2503 | void Assembler::sahf() { |
| 2504 | // TODO(X64): Test for presence. Not all 64-bit intel CPU's have sahf |
| 2505 | // in 64-bit mode. Test CpuID. |
| 2506 | EnsureSpace ensure_space(this); |
| 2507 | last_pc_ = pc_; |
| 2508 | emit(0x9E); |
| 2509 | } |
| 2510 | |
| 2511 | |
| 2512 | void Assembler::emit_farith(int b1, int b2, int i) { |
| 2513 | ASSERT(is_uint8(b1) && is_uint8(b2)); // wrong opcode |
| 2514 | ASSERT(is_uint3(i)); // illegal stack offset |
| 2515 | emit(b1); |
| 2516 | emit(b2 + i); |
| 2517 | } |
| 2518 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2519 | // SSE 2 operations. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2520 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2521 | void Assembler::movd(XMMRegister dst, Register src) { |
| 2522 | EnsureSpace ensure_space(this); |
| 2523 | last_pc_ = pc_; |
| 2524 | emit(0x66); |
| 2525 | emit_optional_rex_32(dst, src); |
| 2526 | emit(0x0F); |
| 2527 | emit(0x6E); |
| 2528 | emit_sse_operand(dst, src); |
| 2529 | } |
| 2530 | |
| 2531 | |
| 2532 | void Assembler::movd(Register dst, XMMRegister src) { |
| 2533 | EnsureSpace ensure_space(this); |
| 2534 | last_pc_ = pc_; |
| 2535 | emit(0x66); |
| 2536 | emit_optional_rex_32(dst, src); |
| 2537 | emit(0x0F); |
| 2538 | emit(0x7E); |
| 2539 | emit_sse_operand(dst, src); |
| 2540 | } |
| 2541 | |
| 2542 | |
| 2543 | void Assembler::movq(XMMRegister dst, Register src) { |
| 2544 | EnsureSpace ensure_space(this); |
| 2545 | last_pc_ = pc_; |
| 2546 | emit(0x66); |
| 2547 | emit_rex_64(dst, src); |
| 2548 | emit(0x0F); |
| 2549 | emit(0x6E); |
| 2550 | emit_sse_operand(dst, src); |
| 2551 | } |
| 2552 | |
| 2553 | |
| 2554 | void Assembler::movq(Register dst, XMMRegister src) { |
| 2555 | EnsureSpace ensure_space(this); |
| 2556 | last_pc_ = pc_; |
| 2557 | emit(0x66); |
| 2558 | emit_rex_64(dst, src); |
| 2559 | emit(0x0F); |
| 2560 | emit(0x7E); |
| 2561 | emit_sse_operand(dst, src); |
| 2562 | } |
| 2563 | |
| 2564 | |
| 2565 | void Assembler::extractps(Register dst, XMMRegister src, byte imm8) { |
| 2566 | ASSERT(is_uint2(imm8)); |
| 2567 | EnsureSpace ensure_space(this); |
| 2568 | last_pc_ = pc_; |
| 2569 | emit(0x66); |
| 2570 | emit_optional_rex_32(dst, src); |
| 2571 | emit(0x0F); |
| 2572 | emit(0x3A); |
| 2573 | emit(0x17); |
| 2574 | emit_sse_operand(dst, src); |
| 2575 | emit(imm8); |
| 2576 | } |
| 2577 | |
| 2578 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2579 | void Assembler::movsd(const Operand& dst, XMMRegister src) { |
| 2580 | EnsureSpace ensure_space(this); |
| 2581 | last_pc_ = pc_; |
| 2582 | emit(0xF2); // double |
| 2583 | emit_optional_rex_32(src, dst); |
| 2584 | emit(0x0F); |
| 2585 | emit(0x11); // store |
| 2586 | emit_sse_operand(src, dst); |
| 2587 | } |
| 2588 | |
| 2589 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 2590 | void Assembler::movsd(XMMRegister dst, XMMRegister src) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2591 | EnsureSpace ensure_space(this); |
| 2592 | last_pc_ = pc_; |
| 2593 | emit(0xF2); // double |
| 2594 | emit_optional_rex_32(dst, src); |
| 2595 | emit(0x0F); |
| 2596 | emit(0x10); // load |
| 2597 | emit_sse_operand(dst, src); |
| 2598 | } |
| 2599 | |
| 2600 | |
| 2601 | void Assembler::movsd(XMMRegister dst, const Operand& src) { |
| 2602 | EnsureSpace ensure_space(this); |
| 2603 | last_pc_ = pc_; |
| 2604 | emit(0xF2); // double |
| 2605 | emit_optional_rex_32(dst, src); |
| 2606 | emit(0x0F); |
| 2607 | emit(0x10); // load |
| 2608 | emit_sse_operand(dst, src); |
| 2609 | } |
| 2610 | |
| 2611 | |
| 2612 | void Assembler::cvttss2si(Register dst, const Operand& src) { |
| 2613 | EnsureSpace ensure_space(this); |
| 2614 | last_pc_ = pc_; |
| 2615 | emit(0xF3); |
| 2616 | emit_optional_rex_32(dst, src); |
| 2617 | emit(0x0F); |
| 2618 | emit(0x2C); |
| 2619 | emit_operand(dst, src); |
| 2620 | } |
| 2621 | |
| 2622 | |
| 2623 | void Assembler::cvttsd2si(Register dst, const Operand& src) { |
| 2624 | EnsureSpace ensure_space(this); |
| 2625 | last_pc_ = pc_; |
| 2626 | emit(0xF2); |
| 2627 | emit_optional_rex_32(dst, src); |
| 2628 | emit(0x0F); |
| 2629 | emit(0x2C); |
| 2630 | emit_operand(dst, src); |
| 2631 | } |
| 2632 | |
| 2633 | |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 2634 | void Assembler::cvttsd2siq(Register dst, XMMRegister src) { |
| 2635 | EnsureSpace ensure_space(this); |
| 2636 | last_pc_ = pc_; |
| 2637 | emit(0xF2); |
| 2638 | emit_rex_64(dst, src); |
| 2639 | emit(0x0F); |
| 2640 | emit(0x2C); |
| 2641 | emit_sse_operand(dst, src); |
| 2642 | } |
| 2643 | |
| 2644 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2645 | void Assembler::cvtlsi2sd(XMMRegister dst, const Operand& src) { |
| 2646 | EnsureSpace ensure_space(this); |
| 2647 | last_pc_ = pc_; |
| 2648 | emit(0xF2); |
| 2649 | emit_optional_rex_32(dst, src); |
| 2650 | emit(0x0F); |
| 2651 | emit(0x2A); |
| 2652 | emit_sse_operand(dst, src); |
| 2653 | } |
| 2654 | |
| 2655 | |
| 2656 | void Assembler::cvtlsi2sd(XMMRegister dst, Register src) { |
| 2657 | EnsureSpace ensure_space(this); |
| 2658 | last_pc_ = pc_; |
| 2659 | emit(0xF2); |
| 2660 | emit_optional_rex_32(dst, src); |
| 2661 | emit(0x0F); |
| 2662 | emit(0x2A); |
| 2663 | emit_sse_operand(dst, src); |
| 2664 | } |
| 2665 | |
| 2666 | |
| 2667 | void Assembler::cvtqsi2sd(XMMRegister dst, Register src) { |
| 2668 | EnsureSpace ensure_space(this); |
| 2669 | last_pc_ = pc_; |
| 2670 | emit(0xF2); |
| 2671 | emit_rex_64(dst, src); |
| 2672 | emit(0x0F); |
| 2673 | emit(0x2A); |
| 2674 | emit_sse_operand(dst, src); |
| 2675 | } |
| 2676 | |
| 2677 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2678 | void Assembler::cvtss2sd(XMMRegister dst, XMMRegister src) { |
| 2679 | EnsureSpace ensure_space(this); |
| 2680 | last_pc_ = pc_; |
| 2681 | emit(0xF3); |
| 2682 | emit_optional_rex_32(dst, src); |
| 2683 | emit(0x0F); |
| 2684 | emit(0x5A); |
| 2685 | emit_sse_operand(dst, src); |
| 2686 | } |
| 2687 | |
| 2688 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2689 | void Assembler::addsd(XMMRegister dst, XMMRegister src) { |
| 2690 | EnsureSpace ensure_space(this); |
| 2691 | last_pc_ = pc_; |
| 2692 | emit(0xF2); |
| 2693 | emit_optional_rex_32(dst, src); |
| 2694 | emit(0x0F); |
| 2695 | emit(0x58); |
| 2696 | emit_sse_operand(dst, src); |
| 2697 | } |
| 2698 | |
| 2699 | |
| 2700 | void Assembler::mulsd(XMMRegister dst, XMMRegister src) { |
| 2701 | EnsureSpace ensure_space(this); |
| 2702 | last_pc_ = pc_; |
| 2703 | emit(0xF2); |
| 2704 | emit_optional_rex_32(dst, src); |
| 2705 | emit(0x0F); |
| 2706 | emit(0x59); |
| 2707 | emit_sse_operand(dst, src); |
| 2708 | } |
| 2709 | |
| 2710 | |
| 2711 | void Assembler::subsd(XMMRegister dst, XMMRegister src) { |
| 2712 | EnsureSpace ensure_space(this); |
| 2713 | last_pc_ = pc_; |
| 2714 | emit(0xF2); |
| 2715 | emit_optional_rex_32(dst, src); |
| 2716 | emit(0x0F); |
| 2717 | emit(0x5C); |
| 2718 | emit_sse_operand(dst, src); |
| 2719 | } |
| 2720 | |
| 2721 | |
| 2722 | void Assembler::divsd(XMMRegister dst, XMMRegister src) { |
| 2723 | EnsureSpace ensure_space(this); |
| 2724 | last_pc_ = pc_; |
| 2725 | emit(0xF2); |
| 2726 | emit_optional_rex_32(dst, src); |
| 2727 | emit(0x0F); |
| 2728 | emit(0x5E); |
| 2729 | emit_sse_operand(dst, src); |
| 2730 | } |
| 2731 | |
| 2732 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 2733 | void Assembler::xorpd(XMMRegister dst, XMMRegister src) { |
| 2734 | EnsureSpace ensure_space(this); |
| 2735 | last_pc_ = pc_; |
| 2736 | emit(0x66); |
| 2737 | emit_optional_rex_32(dst, src); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2738 | emit(0x0F); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 2739 | emit(0x57); |
| 2740 | emit_sse_operand(dst, src); |
| 2741 | } |
| 2742 | |
| 2743 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2744 | void Assembler::sqrtsd(XMMRegister dst, XMMRegister src) { |
| 2745 | EnsureSpace ensure_space(this); |
| 2746 | last_pc_ = pc_; |
| 2747 | emit(0xF2); |
| 2748 | emit_optional_rex_32(dst, src); |
| 2749 | emit(0x0F); |
| 2750 | emit(0x51); |
| 2751 | emit_sse_operand(dst, src); |
| 2752 | } |
| 2753 | |
| 2754 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 2755 | void Assembler::ucomisd(XMMRegister dst, XMMRegister src) { |
| 2756 | EnsureSpace ensure_space(this); |
| 2757 | last_pc_ = pc_; |
| 2758 | emit(0x66); |
| 2759 | emit_optional_rex_32(dst, src); |
| 2760 | emit(0x0f); |
| 2761 | emit(0x2e); |
| 2762 | emit_sse_operand(dst, src); |
| 2763 | } |
| 2764 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2765 | |
| 2766 | void Assembler::emit_sse_operand(XMMRegister reg, const Operand& adr) { |
| 2767 | Register ireg = { reg.code() }; |
| 2768 | emit_operand(ireg, adr); |
| 2769 | } |
| 2770 | |
| 2771 | |
| 2772 | void Assembler::emit_sse_operand(XMMRegister dst, XMMRegister src) { |
| 2773 | emit(0xC0 | (dst.low_bits() << 3) | src.low_bits()); |
| 2774 | } |
| 2775 | |
| 2776 | void Assembler::emit_sse_operand(XMMRegister dst, Register src) { |
| 2777 | emit(0xC0 | (dst.low_bits() << 3) | src.low_bits()); |
| 2778 | } |
| 2779 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2780 | void Assembler::emit_sse_operand(Register dst, XMMRegister src) { |
| 2781 | emit(0xC0 | (dst.low_bits() << 3) | src.low_bits()); |
| 2782 | } |
| 2783 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2784 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 2785 | // Relocation information implementations. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2786 | |
| 2787 | void Assembler::RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data) { |
| 2788 | ASSERT(rmode != RelocInfo::NONE); |
| 2789 | // Don't record external references unless the heap will be serialized. |
| 2790 | if (rmode == RelocInfo::EXTERNAL_REFERENCE && |
| 2791 | !Serializer::enabled() && |
| 2792 | !FLAG_debug_code) { |
| 2793 | return; |
| 2794 | } |
| 2795 | RelocInfo rinfo(pc_, rmode, data); |
| 2796 | reloc_info_writer.Write(&rinfo); |
| 2797 | } |
| 2798 | |
| 2799 | void Assembler::RecordJSReturn() { |
| 2800 | WriteRecordedPositions(); |
| 2801 | EnsureSpace ensure_space(this); |
| 2802 | RecordRelocInfo(RelocInfo::JS_RETURN); |
| 2803 | } |
| 2804 | |
| 2805 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 2806 | void Assembler::RecordDebugBreakSlot() { |
| 2807 | WriteRecordedPositions(); |
| 2808 | EnsureSpace ensure_space(this); |
| 2809 | RecordRelocInfo(RelocInfo::DEBUG_BREAK_SLOT); |
| 2810 | } |
| 2811 | |
| 2812 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2813 | void Assembler::RecordComment(const char* msg) { |
| 2814 | if (FLAG_debug_code) { |
| 2815 | EnsureSpace ensure_space(this); |
| 2816 | RecordRelocInfo(RelocInfo::COMMENT, reinterpret_cast<intptr_t>(msg)); |
| 2817 | } |
| 2818 | } |
| 2819 | |
| 2820 | |
| 2821 | void Assembler::RecordPosition(int pos) { |
| 2822 | ASSERT(pos != RelocInfo::kNoPosition); |
| 2823 | ASSERT(pos >= 0); |
| 2824 | current_position_ = pos; |
| 2825 | } |
| 2826 | |
| 2827 | |
| 2828 | void Assembler::RecordStatementPosition(int pos) { |
| 2829 | ASSERT(pos != RelocInfo::kNoPosition); |
| 2830 | ASSERT(pos >= 0); |
| 2831 | current_statement_position_ = pos; |
| 2832 | } |
| 2833 | |
| 2834 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 2835 | bool Assembler::WriteRecordedPositions() { |
| 2836 | bool written = false; |
| 2837 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2838 | // Write the statement position if it is different from what was written last |
| 2839 | // time. |
| 2840 | if (current_statement_position_ != written_statement_position_) { |
| 2841 | EnsureSpace ensure_space(this); |
| 2842 | RecordRelocInfo(RelocInfo::STATEMENT_POSITION, current_statement_position_); |
| 2843 | written_statement_position_ = current_statement_position_; |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 2844 | written = true; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2845 | } |
| 2846 | |
| 2847 | // Write the position if it is different from what was written last time and |
| 2848 | // also different from the written statement position. |
| 2849 | if (current_position_ != written_position_ && |
| 2850 | current_position_ != written_statement_position_) { |
| 2851 | EnsureSpace ensure_space(this); |
| 2852 | RecordRelocInfo(RelocInfo::POSITION, current_position_); |
| 2853 | written_position_ = current_position_; |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 2854 | written = true; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2855 | } |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 2856 | |
| 2857 | // Return whether something was written. |
| 2858 | return written; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2859 | } |
| 2860 | |
| 2861 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 2862 | const int RelocInfo::kApplyMask = RelocInfo::kCodeTargetMask | |
| 2863 | 1 << RelocInfo::INTERNAL_REFERENCE | |
| 2864 | 1 << RelocInfo::JS_RETURN; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2865 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 2866 | |
| 2867 | bool RelocInfo::IsCodedSpecially() { |
| 2868 | // The deserializer needs to know whether a pointer is specially coded. Being |
| 2869 | // specially coded on x64 means that it is a relative 32 bit address, as used |
| 2870 | // by branch instructions. |
| 2871 | return (1 << rmode_) & kApplyMask; |
| 2872 | } |
| 2873 | |
| 2874 | |
| 2875 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2876 | } } // namespace v8::internal |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 2877 | |
| 2878 | #endif // V8_TARGET_ARCH_X64 |