| // Copyright 2009 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "v8.h" |
| |
| #include "macro-assembler.h" |
| #include "serialize.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // ----------------------------------------------------------------------------- |
| // Implementation of Register |
| |
| Register rax = { 0 }; |
| Register rcx = { 1 }; |
| Register rdx = { 2 }; |
| Register rbx = { 3 }; |
| Register rsp = { 4 }; |
| Register rbp = { 5 }; |
| Register rsi = { 6 }; |
| Register rdi = { 7 }; |
| Register r8 = { 8 }; |
| Register r9 = { 9 }; |
| Register r10 = { 10 }; |
| Register r11 = { 11 }; |
| Register r12 = { 12 }; |
| Register r13 = { 13 }; |
| Register r14 = { 14 }; |
| Register r15 = { 15 }; |
| |
| Register no_reg = { -1 }; |
| |
| XMMRegister xmm0 = { 0 }; |
| XMMRegister xmm1 = { 1 }; |
| XMMRegister xmm2 = { 2 }; |
| XMMRegister xmm3 = { 3 }; |
| XMMRegister xmm4 = { 4 }; |
| XMMRegister xmm5 = { 5 }; |
| XMMRegister xmm6 = { 6 }; |
| XMMRegister xmm7 = { 7 }; |
| XMMRegister xmm8 = { 8 }; |
| XMMRegister xmm9 = { 9 }; |
| XMMRegister xmm10 = { 10 }; |
| XMMRegister xmm11 = { 11 }; |
| XMMRegister xmm12 = { 12 }; |
| XMMRegister xmm13 = { 13 }; |
| XMMRegister xmm14 = { 14 }; |
| XMMRegister xmm15 = { 15 }; |
| |
| |
| // ----------------------------------------------------------------------------- |
| // Implementation of CpuFeatures |
| |
| // The required user mode extensions in X64 are (from AMD64 ABI Table A.1): |
| // fpu, tsc, cx8, cmov, mmx, sse, sse2, fxsr, syscall |
| uint64_t CpuFeatures::supported_ = kDefaultCpuFeatures; |
| uint64_t CpuFeatures::enabled_ = 0; |
| |
| void CpuFeatures::Probe() { |
| ASSERT(Heap::HasBeenSetup()); |
| ASSERT(supported_ == kDefaultCpuFeatures); |
| if (Serializer::enabled()) return; // No features if we might serialize. |
| |
| Assembler assm(NULL, 0); |
| Label cpuid, done; |
| #define __ assm. |
| // Save old rsp, since we are going to modify the stack. |
| __ push(rbp); |
| __ pushfq(); |
| __ push(rcx); |
| __ push(rbx); |
| __ movq(rbp, rsp); |
| |
| // If we can modify bit 21 of the EFLAGS register, then CPUID is supported. |
| __ pushfq(); |
| __ pop(rax); |
| __ movq(rdx, rax); |
| __ xor_(rax, Immediate(0x200000)); // Flip bit 21. |
| __ push(rax); |
| __ popfq(); |
| __ pushfq(); |
| __ pop(rax); |
| __ xor_(rax, rdx); // Different if CPUID is supported. |
| __ j(not_zero, &cpuid); |
| |
| // CPUID not supported. Clear the supported features in edx:eax. |
| __ xor_(rax, rax); |
| __ jmp(&done); |
| |
| // Invoke CPUID with 1 in eax to get feature information in |
| // ecx:edx. Temporarily enable CPUID support because we know it's |
| // safe here. |
| __ bind(&cpuid); |
| __ movq(rax, Immediate(1)); |
| supported_ = kDefaultCpuFeatures | (1 << CPUID); |
| { Scope fscope(CPUID); |
| __ cpuid(); |
| // Move the result from ecx:edx to rdi. |
| __ movl(rdi, rdx); // Zero-extended to 64 bits. |
| __ shl(rcx, Immediate(32)); |
| __ or_(rdi, rcx); |
| |
| // Get the sahf supported flag, from CPUID(0x80000001) |
| __ movq(rax, 0x80000001, RelocInfo::NONE); |
| __ cpuid(); |
| } |
| supported_ = kDefaultCpuFeatures; |
| |
| // Put the CPU flags in rax. |
| // rax = (rcx & 1) | (rdi & ~1) | (1 << CPUID). |
| __ movl(rax, Immediate(1)); |
| __ and_(rcx, rax); // Bit 0 is set if SAHF instruction supported. |
| __ not_(rax); |
| __ and_(rax, rdi); |
| __ or_(rax, rcx); |
| __ or_(rax, Immediate(1 << CPUID)); |
| |
| // Done. |
| __ bind(&done); |
| __ movq(rsp, rbp); |
| __ pop(rbx); |
| __ pop(rcx); |
| __ popfq(); |
| __ pop(rbp); |
| __ ret(0); |
| #undef __ |
| |
| CodeDesc desc; |
| assm.GetCode(&desc); |
| Object* code = |
| Heap::CreateCode(desc, NULL, Code::ComputeFlags(Code::STUB), NULL); |
| if (!code->IsCode()) return; |
| LOG(CodeCreateEvent(Logger::BUILTIN_TAG, |
| Code::cast(code), "CpuFeatures::Probe")); |
| typedef uint64_t (*F0)(); |
| F0 probe = FUNCTION_CAST<F0>(Code::cast(code)->entry()); |
| supported_ = probe(); |
| // SSE2 and CMOV must be available on an X64 CPU. |
| ASSERT(IsSupported(CPUID)); |
| ASSERT(IsSupported(SSE2)); |
| ASSERT(IsSupported(CMOV)); |
| } |
| |
| |
| // ----------------------------------------------------------------------------- |
| // Implementation of RelocInfo |
| |
| // Patch the code at the current PC with a call to the target address. |
| // Additional guard int3 instructions can be added if required. |
| void RelocInfo::PatchCodeWithCall(Address target, int guard_bytes) { |
| // Load register with immediate 64 and call through a register instructions |
| // takes up 13 bytes and int3 takes up one byte. |
| static const int kCallCodeSize = 13; |
| int code_size = kCallCodeSize + guard_bytes; |
| |
| // Create a code patcher. |
| CodePatcher patcher(pc_, code_size); |
| |
| // Add a label for checking the size of the code used for returning. |
| #ifdef DEBUG |
| Label check_codesize; |
| patcher.masm()->bind(&check_codesize); |
| #endif |
| |
| // Patch the code. |
| patcher.masm()->movq(r10, target, RelocInfo::NONE); |
| patcher.masm()->call(r10); |
| |
| // Check that the size of the code generated is as expected. |
| ASSERT_EQ(kCallCodeSize, |
| patcher.masm()->SizeOfCodeGeneratedSince(&check_codesize)); |
| |
| // Add the requested number of int3 instructions after the call. |
| for (int i = 0; i < guard_bytes; i++) { |
| patcher.masm()->int3(); |
| } |
| } |
| |
| |
| void RelocInfo::PatchCode(byte* instructions, int instruction_count) { |
| // Patch the code at the current address with the supplied instructions. |
| for (int i = 0; i < instruction_count; i++) { |
| *(pc_ + i) = *(instructions + i); |
| } |
| |
| // Indicate that code has changed. |
| CPU::FlushICache(pc_, instruction_count); |
| } |
| |
| // ----------------------------------------------------------------------------- |
| // Implementation of Operand |
| |
| Operand::Operand(Register base, int32_t disp): rex_(0) { |
| len_ = 1; |
| if (base.is(rsp) || base.is(r12)) { |
| // SIB byte is needed to encode (rsp + offset) or (r12 + offset). |
| set_sib(times_1, rsp, base); |
| } |
| |
| if (disp == 0 && !base.is(rbp) && !base.is(r13)) { |
| set_modrm(0, base); |
| } else if (is_int8(disp)) { |
| set_modrm(1, base); |
| set_disp8(disp); |
| } else { |
| set_modrm(2, base); |
| set_disp32(disp); |
| } |
| } |
| |
| |
| Operand::Operand(Register base, |
| Register index, |
| ScaleFactor scale, |
| int32_t disp): rex_(0) { |
| ASSERT(!index.is(rsp)); |
| len_ = 1; |
| set_sib(scale, index, base); |
| if (disp == 0 && !base.is(rbp) && !base.is(r13)) { |
| // This call to set_modrm doesn't overwrite the REX.B (or REX.X) bits |
| // possibly set by set_sib. |
| set_modrm(0, rsp); |
| } else if (is_int8(disp)) { |
| set_modrm(1, rsp); |
| set_disp8(disp); |
| } else { |
| set_modrm(2, rsp); |
| set_disp32(disp); |
| } |
| } |
| |
| |
| // ----------------------------------------------------------------------------- |
| // Implementation of Assembler |
| |
| #ifdef GENERATED_CODE_COVERAGE |
| static void InitCoverageLog(); |
| #endif |
| |
| byte* Assembler::spare_buffer_ = NULL; |
| |
| Assembler::Assembler(void* buffer, int buffer_size) |
| : code_targets_(100) { |
| if (buffer == NULL) { |
| // do our own buffer management |
| if (buffer_size <= kMinimalBufferSize) { |
| buffer_size = kMinimalBufferSize; |
| |
| if (spare_buffer_ != NULL) { |
| buffer = spare_buffer_; |
| spare_buffer_ = NULL; |
| } |
| } |
| if (buffer == NULL) { |
| buffer_ = NewArray<byte>(buffer_size); |
| } else { |
| buffer_ = static_cast<byte*>(buffer); |
| } |
| buffer_size_ = buffer_size; |
| own_buffer_ = true; |
| } else { |
| // use externally provided buffer instead |
| ASSERT(buffer_size > 0); |
| buffer_ = static_cast<byte*>(buffer); |
| buffer_size_ = buffer_size; |
| own_buffer_ = false; |
| } |
| |
| // Clear the buffer in debug mode unless it was provided by the |
| // caller in which case we can't be sure it's okay to overwrite |
| // existing code in it. |
| #ifdef DEBUG |
| if (own_buffer_) { |
| memset(buffer_, 0xCC, buffer_size); // int3 |
| } |
| #endif |
| |
| // setup buffer pointers |
| ASSERT(buffer_ != NULL); |
| pc_ = buffer_; |
| reloc_info_writer.Reposition(buffer_ + buffer_size, pc_); |
| |
| last_pc_ = NULL; |
| current_statement_position_ = RelocInfo::kNoPosition; |
| current_position_ = RelocInfo::kNoPosition; |
| written_statement_position_ = current_statement_position_; |
| written_position_ = current_position_; |
| #ifdef GENERATED_CODE_COVERAGE |
| InitCoverageLog(); |
| #endif |
| } |
| |
| |
| Assembler::~Assembler() { |
| if (own_buffer_) { |
| if (spare_buffer_ == NULL && buffer_size_ == kMinimalBufferSize) { |
| spare_buffer_ = buffer_; |
| } else { |
| DeleteArray(buffer_); |
| } |
| } |
| } |
| |
| |
| void Assembler::GetCode(CodeDesc* desc) { |
| // finalize code |
| // (at this point overflow() may be true, but the gap ensures that |
| // we are still not overlapping instructions and relocation info) |
| ASSERT(pc_ <= reloc_info_writer.pos()); // no overlap |
| // setup desc |
| desc->buffer = buffer_; |
| desc->buffer_size = buffer_size_; |
| desc->instr_size = pc_offset(); |
| ASSERT(desc->instr_size > 0); // Zero-size code objects upset the system. |
| desc->reloc_size = (buffer_ + buffer_size_) - reloc_info_writer.pos(); |
| desc->origin = this; |
| |
| Counters::reloc_info_size.Increment(desc->reloc_size); |
| } |
| |
| |
| void Assembler::Align(int m) { |
| ASSERT(IsPowerOf2(m)); |
| while ((pc_offset() & (m - 1)) != 0) { |
| nop(); |
| } |
| } |
| |
| |
| void Assembler::bind_to(Label* L, int pos) { |
| ASSERT(!L->is_bound()); // Label may only be bound once. |
| last_pc_ = NULL; |
| ASSERT(0 <= pos && pos <= pc_offset()); // Position must be valid. |
| if (L->is_linked()) { |
| int current = L->pos(); |
| int next = long_at(current); |
| while (next != current) { |
| // relative address, relative to point after address |
| int imm32 = pos - (current + sizeof(int32_t)); |
| long_at_put(current, imm32); |
| current = next; |
| next = long_at(next); |
| } |
| // Fix up last fixup on linked list. |
| int last_imm32 = pos - (current + sizeof(int32_t)); |
| long_at_put(current, last_imm32); |
| } |
| L->bind_to(pos); |
| } |
| |
| |
| void Assembler::bind(Label* L) { |
| bind_to(L, pc_offset()); |
| } |
| |
| |
| void Assembler::GrowBuffer() { |
| ASSERT(buffer_overflow()); // should not call this otherwise |
| if (!own_buffer_) FATAL("external code buffer is too small"); |
| |
| // compute new buffer size |
| CodeDesc desc; // the new buffer |
| if (buffer_size_ < 4*KB) { |
| desc.buffer_size = 4*KB; |
| } else { |
| desc.buffer_size = 2*buffer_size_; |
| } |
| // Some internal data structures overflow for very large buffers, |
| // they must ensure that kMaximalBufferSize is not too large. |
| if ((desc.buffer_size > kMaximalBufferSize) || |
| (desc.buffer_size > Heap::OldGenerationSize())) { |
| V8::FatalProcessOutOfMemory("Assembler::GrowBuffer"); |
| } |
| |
| // setup new buffer |
| desc.buffer = NewArray<byte>(desc.buffer_size); |
| desc.instr_size = pc_offset(); |
| desc.reloc_size = (buffer_ + buffer_size_) - (reloc_info_writer.pos()); |
| |
| // Clear the buffer in debug mode. Use 'int3' instructions to make |
| // sure to get into problems if we ever run uninitialized code. |
| #ifdef DEBUG |
| memset(desc.buffer, 0xCC, desc.buffer_size); |
| #endif |
| |
| // copy the data |
| intptr_t pc_delta = desc.buffer - buffer_; |
| intptr_t rc_delta = (desc.buffer + desc.buffer_size) - |
| (buffer_ + buffer_size_); |
| memmove(desc.buffer, buffer_, desc.instr_size); |
| memmove(rc_delta + reloc_info_writer.pos(), |
| reloc_info_writer.pos(), desc.reloc_size); |
| |
| // switch buffers |
| if (spare_buffer_ == NULL && buffer_size_ == kMinimalBufferSize) { |
| spare_buffer_ = buffer_; |
| } else { |
| DeleteArray(buffer_); |
| } |
| buffer_ = desc.buffer; |
| buffer_size_ = desc.buffer_size; |
| pc_ += pc_delta; |
| if (last_pc_ != NULL) { |
| last_pc_ += pc_delta; |
| } |
| reloc_info_writer.Reposition(reloc_info_writer.pos() + rc_delta, |
| reloc_info_writer.last_pc() + pc_delta); |
| |
| // relocate runtime entries |
| for (RelocIterator it(desc); !it.done(); it.next()) { |
| RelocInfo::Mode rmode = it.rinfo()->rmode(); |
| if (rmode == RelocInfo::INTERNAL_REFERENCE) { |
| intptr_t* p = reinterpret_cast<intptr_t*>(it.rinfo()->pc()); |
| if (*p != 0) { // 0 means uninitialized. |
| *p += pc_delta; |
| } |
| } |
| } |
| |
| ASSERT(!buffer_overflow()); |
| } |
| |
| |
| void Assembler::emit_operand(int code, const Operand& adr) { |
| ASSERT(is_uint3(code)); |
| const unsigned length = adr.len_; |
| ASSERT(length > 0); |
| |
| // Emit updated ModR/M byte containing the given register. |
| ASSERT((adr.buf_[0] & 0x38) == 0); |
| pc_[0] = adr.buf_[0] | code << 3; |
| |
| // Emit the rest of the encoded operand. |
| for (unsigned i = 1; i < length; i++) pc_[i] = adr.buf_[i]; |
| pc_ += length; |
| } |
| |
| |
| // Assembler Instruction implementations |
| |
| void Assembler::arithmetic_op(byte opcode, Register reg, const Operand& op) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(reg, op); |
| emit(opcode); |
| emit_operand(reg, op); |
| } |
| |
| |
| void Assembler::arithmetic_op(byte opcode, Register reg, Register rm_reg) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(reg, rm_reg); |
| emit(opcode); |
| emit_modrm(reg, rm_reg); |
| } |
| |
| |
| void Assembler::arithmetic_op_16(byte opcode, Register reg, Register rm_reg) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0x66); |
| emit_optional_rex_32(reg, rm_reg); |
| emit(opcode); |
| emit_modrm(reg, rm_reg); |
| } |
| |
| |
| void Assembler::arithmetic_op_16(byte opcode, |
| Register reg, |
| const Operand& rm_reg) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0x66); |
| emit_optional_rex_32(reg, rm_reg); |
| emit(opcode); |
| emit_operand(reg, rm_reg); |
| } |
| |
| |
| void Assembler::arithmetic_op_32(byte opcode, Register reg, Register rm_reg) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(reg, rm_reg); |
| emit(opcode); |
| emit_modrm(reg, rm_reg); |
| } |
| |
| |
| void Assembler::arithmetic_op_32(byte opcode, |
| Register reg, |
| const Operand& rm_reg) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(reg, rm_reg); |
| emit(opcode); |
| emit_operand(reg, rm_reg); |
| } |
| |
| |
| void Assembler::immediate_arithmetic_op(byte subcode, |
| Register dst, |
| Immediate src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst); |
| if (is_int8(src.value_)) { |
| emit(0x83); |
| emit_modrm(subcode, dst); |
| emit(src.value_); |
| } else if (dst.is(rax)) { |
| emit(0x05 | (subcode << 3)); |
| emitl(src.value_); |
| } else { |
| emit(0x81); |
| emit_modrm(subcode, dst); |
| emitl(src.value_); |
| } |
| } |
| |
| void Assembler::immediate_arithmetic_op(byte subcode, |
| const Operand& dst, |
| Immediate src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst); |
| if (is_int8(src.value_)) { |
| emit(0x83); |
| emit_operand(subcode, dst); |
| emit(src.value_); |
| } else { |
| emit(0x81); |
| emit_operand(subcode, dst); |
| emitl(src.value_); |
| } |
| } |
| |
| |
| void Assembler::immediate_arithmetic_op_16(byte subcode, |
| Register dst, |
| Immediate src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0x66); // Operand size override prefix. |
| emit_optional_rex_32(dst); |
| if (is_int8(src.value_)) { |
| emit(0x83); |
| emit_modrm(subcode, dst); |
| emit(src.value_); |
| } else if (dst.is(rax)) { |
| emit(0x05 | (subcode << 3)); |
| emitl(src.value_); |
| } else { |
| emit(0x81); |
| emit_modrm(subcode, dst); |
| emitl(src.value_); |
| } |
| } |
| |
| |
| void Assembler::immediate_arithmetic_op_16(byte subcode, |
| const Operand& dst, |
| Immediate src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0x66); // Operand size override prefix. |
| emit_optional_rex_32(dst); |
| if (is_int8(src.value_)) { |
| emit(0x83); |
| emit_operand(subcode, dst); |
| emit(src.value_); |
| } else { |
| emit(0x81); |
| emit_operand(subcode, dst); |
| emitl(src.value_); |
| } |
| } |
| |
| |
| void Assembler::immediate_arithmetic_op_32(byte subcode, |
| Register dst, |
| Immediate src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(dst); |
| if (is_int8(src.value_)) { |
| emit(0x83); |
| emit_modrm(subcode, dst); |
| emit(src.value_); |
| } else if (dst.is(rax)) { |
| emit(0x05 | (subcode << 3)); |
| emitl(src.value_); |
| } else { |
| emit(0x81); |
| emit_modrm(subcode, dst); |
| emitl(src.value_); |
| } |
| } |
| |
| |
| void Assembler::immediate_arithmetic_op_32(byte subcode, |
| const Operand& dst, |
| Immediate src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(dst); |
| if (is_int8(src.value_)) { |
| emit(0x83); |
| emit_operand(subcode, dst); |
| emit(src.value_); |
| } else { |
| emit(0x81); |
| emit_operand(subcode, dst); |
| emitl(src.value_); |
| } |
| } |
| |
| |
| void Assembler::immediate_arithmetic_op_8(byte subcode, |
| const Operand& dst, |
| Immediate src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(dst); |
| ASSERT(is_int8(src.value_) || is_uint8(src.value_)); |
| emit(0x80); |
| emit_operand(subcode, dst); |
| emit(src.value_); |
| } |
| |
| |
| void Assembler::immediate_arithmetic_op_8(byte subcode, |
| Register dst, |
| Immediate src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| if (dst.code() > 3) { |
| // Use 64-bit mode byte registers. |
| emit_rex_64(dst); |
| } |
| ASSERT(is_int8(src.value_) || is_uint8(src.value_)); |
| emit(0x80); |
| emit_modrm(subcode, dst); |
| emit(src.value_); |
| } |
| |
| |
| void Assembler::shift(Register dst, Immediate shift_amount, int subcode) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| ASSERT(is_uint6(shift_amount.value_)); // illegal shift count |
| if (shift_amount.value_ == 1) { |
| emit_rex_64(dst); |
| emit(0xD1); |
| emit_modrm(subcode, dst); |
| } else { |
| emit_rex_64(dst); |
| emit(0xC1); |
| emit_modrm(subcode, dst); |
| emit(shift_amount.value_); |
| } |
| } |
| |
| |
| void Assembler::shift(Register dst, int subcode) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst); |
| emit(0xD3); |
| emit_modrm(subcode, dst); |
| } |
| |
| |
| void Assembler::shift_32(Register dst, int subcode) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(dst); |
| emit(0xD3); |
| emit_modrm(subcode, dst); |
| } |
| |
| |
| void Assembler::shift_32(Register dst, Immediate shift_amount, int subcode) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| ASSERT(is_uint6(shift_amount.value_)); // illegal shift count |
| if (shift_amount.value_ == 1) { |
| emit_optional_rex_32(dst); |
| emit(0xD1); |
| emit_modrm(subcode, dst); |
| } else { |
| emit_optional_rex_32(dst); |
| emit(0xC1); |
| emit_modrm(subcode, dst); |
| emit(shift_amount.value_); |
| } |
| } |
| |
| |
| void Assembler::bt(const Operand& dst, Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(src, dst); |
| emit(0x0F); |
| emit(0xA3); |
| emit_operand(src, dst); |
| } |
| |
| |
| void Assembler::bts(const Operand& dst, Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(src, dst); |
| emit(0x0F); |
| emit(0xAB); |
| emit_operand(src, dst); |
| } |
| |
| |
| void Assembler::call(Label* L) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| // 1110 1000 #32-bit disp |
| emit(0xE8); |
| if (L->is_bound()) { |
| int offset = L->pos() - pc_offset() - sizeof(int32_t); |
| ASSERT(offset <= 0); |
| emitl(offset); |
| } else if (L->is_linked()) { |
| emitl(L->pos()); |
| L->link_to(pc_offset() - sizeof(int32_t)); |
| } else { |
| ASSERT(L->is_unused()); |
| int32_t current = pc_offset(); |
| emitl(current); |
| L->link_to(current); |
| } |
| } |
| |
| |
| void Assembler::call(Handle<Code> target, RelocInfo::Mode rmode) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| // 1110 1000 #32-bit disp |
| emit(0xE8); |
| emit_code_target(target, rmode); |
| } |
| |
| |
| void Assembler::call(Register adr) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| // Opcode: FF /2 r64 |
| if (adr.high_bit()) { |
| emit_rex_64(adr); |
| } |
| emit(0xFF); |
| emit_modrm(0x2, adr); |
| } |
| |
| |
| void Assembler::call(const Operand& op) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| // Opcode: FF /2 m64 |
| emit_rex_64(op); |
| emit(0xFF); |
| emit_operand(2, op); |
| } |
| |
| |
| void Assembler::cdq() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0x99); |
| } |
| |
| |
| void Assembler::cmovq(Condition cc, Register dst, Register src) { |
| // No need to check CpuInfo for CMOV support, it's a required part of the |
| // 64-bit architecture. |
| ASSERT(cc >= 0); // Use mov for unconditional moves. |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| // Opcode: REX.W 0f 40 + cc /r |
| emit_rex_64(dst, src); |
| emit(0x0f); |
| emit(0x40 + cc); |
| emit_modrm(dst, src); |
| } |
| |
| |
| void Assembler::cmovq(Condition cc, Register dst, const Operand& src) { |
| ASSERT(cc >= 0); |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| // Opcode: REX.W 0f 40 + cc /r |
| emit_rex_64(dst, src); |
| emit(0x0f); |
| emit(0x40 + cc); |
| emit_operand(dst, src); |
| } |
| |
| |
| void Assembler::cmovl(Condition cc, Register dst, Register src) { |
| ASSERT(cc >= 0); |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| // Opcode: 0f 40 + cc /r |
| emit_optional_rex_32(dst, src); |
| emit(0x0f); |
| emit(0x40 + cc); |
| emit_modrm(dst, src); |
| } |
| |
| |
| void Assembler::cmovl(Condition cc, Register dst, const Operand& src) { |
| ASSERT(cc >= 0); |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| // Opcode: 0f 40 + cc /r |
| emit_optional_rex_32(dst, src); |
| emit(0x0f); |
| emit(0x40 + cc); |
| emit_operand(dst, src); |
| } |
| |
| |
| void Assembler::cmpb_al(Immediate imm8) { |
| ASSERT(is_int8(imm8.value_) || is_uint8(imm8.value_)); |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0x3c); |
| emit(imm8.value_); |
| } |
| |
| |
| void Assembler::cpuid() { |
| ASSERT(CpuFeatures::IsEnabled(CpuFeatures::CPUID)); |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0x0F); |
| emit(0xA2); |
| } |
| |
| |
| void Assembler::cqo() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(); |
| emit(0x99); |
| } |
| |
| |
| void Assembler::decq(Register dst) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst); |
| emit(0xFF); |
| emit_modrm(0x1, dst); |
| } |
| |
| |
| void Assembler::decq(const Operand& dst) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst); |
| emit(0xFF); |
| emit_operand(1, dst); |
| } |
| |
| |
| void Assembler::decl(Register dst) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(dst); |
| emit(0xFF); |
| emit_modrm(0x1, dst); |
| } |
| |
| |
| void Assembler::decl(const Operand& dst) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(dst); |
| emit(0xFF); |
| emit_operand(1, dst); |
| } |
| |
| |
| void Assembler::enter(Immediate size) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xC8); |
| emitw(size.value_); // 16 bit operand, always. |
| emit(0); |
| } |
| |
| |
| void Assembler::hlt() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xF4); |
| } |
| |
| |
| void Assembler::idivq(Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(src); |
| emit(0xF7); |
| emit_modrm(0x7, src); |
| } |
| |
| |
| void Assembler::idivl(Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(src); |
| emit(0xF7); |
| emit_modrm(0x7, src); |
| } |
| |
| |
| void Assembler::imul(Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(src); |
| emit(0xF7); |
| emit_modrm(0x5, src); |
| } |
| |
| |
| void Assembler::imul(Register dst, Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst, src); |
| emit(0x0F); |
| emit(0xAF); |
| emit_modrm(dst, src); |
| } |
| |
| |
| void Assembler::imul(Register dst, const Operand& src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst, src); |
| emit(0x0F); |
| emit(0xAF); |
| emit_operand(dst, src); |
| } |
| |
| |
| void Assembler::imul(Register dst, Register src, Immediate imm) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst, src); |
| if (is_int8(imm.value_)) { |
| emit(0x6B); |
| emit_modrm(dst, src); |
| emit(imm.value_); |
| } else { |
| emit(0x69); |
| emit_modrm(dst, src); |
| emitl(imm.value_); |
| } |
| } |
| |
| |
| void Assembler::imull(Register dst, Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(dst, src); |
| emit(0x0F); |
| emit(0xAF); |
| emit_modrm(dst, src); |
| } |
| |
| |
| void Assembler::incq(Register dst) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst); |
| emit(0xFF); |
| emit_modrm(0x0, dst); |
| } |
| |
| |
| void Assembler::incq(const Operand& dst) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst); |
| emit(0xFF); |
| emit_operand(0, dst); |
| } |
| |
| |
| void Assembler::incl(const Operand& dst) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(dst); |
| emit(0xFF); |
| emit_operand(0, dst); |
| } |
| |
| |
| void Assembler::int3() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xCC); |
| } |
| |
| |
| void Assembler::j(Condition cc, Label* L) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| ASSERT(is_uint4(cc)); |
| if (L->is_bound()) { |
| const int short_size = 2; |
| const int long_size = 6; |
| int offs = L->pos() - pc_offset(); |
| ASSERT(offs <= 0); |
| if (is_int8(offs - short_size)) { |
| // 0111 tttn #8-bit disp |
| emit(0x70 | cc); |
| emit((offs - short_size) & 0xFF); |
| } else { |
| // 0000 1111 1000 tttn #32-bit disp |
| emit(0x0F); |
| emit(0x80 | cc); |
| emitl(offs - long_size); |
| } |
| } else if (L->is_linked()) { |
| // 0000 1111 1000 tttn #32-bit disp |
| emit(0x0F); |
| emit(0x80 | cc); |
| emitl(L->pos()); |
| L->link_to(pc_offset() - sizeof(int32_t)); |
| } else { |
| ASSERT(L->is_unused()); |
| emit(0x0F); |
| emit(0x80 | cc); |
| int32_t current = pc_offset(); |
| emitl(current); |
| L->link_to(current); |
| } |
| } |
| |
| |
| void Assembler::j(Condition cc, |
| Handle<Code> target, |
| RelocInfo::Mode rmode) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| ASSERT(is_uint4(cc)); |
| // 0000 1111 1000 tttn #32-bit disp |
| emit(0x0F); |
| emit(0x80 | cc); |
| emit_code_target(target, rmode); |
| } |
| |
| |
| void Assembler::jmp(Label* L) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| if (L->is_bound()) { |
| int offs = L->pos() - pc_offset() - 1; |
| ASSERT(offs <= 0); |
| if (is_int8(offs - sizeof(int8_t))) { |
| // 1110 1011 #8-bit disp |
| emit(0xEB); |
| emit((offs - sizeof(int8_t)) & 0xFF); |
| } else { |
| // 1110 1001 #32-bit disp |
| emit(0xE9); |
| emitl(offs - sizeof(int32_t)); |
| } |
| } else if (L->is_linked()) { |
| // 1110 1001 #32-bit disp |
| emit(0xE9); |
| emitl(L->pos()); |
| L->link_to(pc_offset() - sizeof(int32_t)); |
| } else { |
| // 1110 1001 #32-bit disp |
| ASSERT(L->is_unused()); |
| emit(0xE9); |
| int32_t current = pc_offset(); |
| emitl(current); |
| L->link_to(current); |
| } |
| } |
| |
| |
| void Assembler::jmp(Handle<Code> target, RelocInfo::Mode rmode) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| // 1110 1001 #32-bit disp |
| emit(0xE9); |
| emit_code_target(target, rmode); |
| } |
| |
| |
| void Assembler::jmp(Register target) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| // Opcode FF/4 r64 |
| if (target.high_bit()) { |
| emit_rex_64(target); |
| } |
| emit(0xFF); |
| emit_modrm(0x4, target); |
| } |
| |
| |
| void Assembler::jmp(const Operand& src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| // Opcode FF/4 m64 |
| emit_optional_rex_32(src); |
| emit(0xFF); |
| emit_operand(0x4, src); |
| } |
| |
| |
| void Assembler::lea(Register dst, const Operand& src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst, src); |
| emit(0x8D); |
| emit_operand(dst, src); |
| } |
| |
| |
| void Assembler::load_rax(void* value, RelocInfo::Mode mode) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0x48); // REX.W |
| emit(0xA1); |
| emitq(reinterpret_cast<uintptr_t>(value), mode); |
| } |
| |
| |
| void Assembler::load_rax(ExternalReference ref) { |
| load_rax(ref.address(), RelocInfo::EXTERNAL_REFERENCE); |
| } |
| |
| |
| void Assembler::leave() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xC9); |
| } |
| |
| |
| void Assembler::movb(Register dst, const Operand& src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_32(dst, src); |
| emit(0x8A); |
| emit_operand(dst, src); |
| } |
| |
| void Assembler::movb(Register dst, Immediate imm) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_32(dst); |
| emit(0xC6); |
| emit_modrm(0x0, dst); |
| emit(imm.value_); |
| } |
| |
| void Assembler::movb(const Operand& dst, Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_32(src, dst); |
| emit(0x88); |
| emit_operand(src, dst); |
| } |
| |
| void Assembler::movl(Register dst, const Operand& src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(dst, src); |
| emit(0x8B); |
| emit_operand(dst, src); |
| } |
| |
| |
| void Assembler::movl(Register dst, Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(dst, src); |
| emit(0x8B); |
| emit_modrm(dst, src); |
| } |
| |
| |
| void Assembler::movl(const Operand& dst, Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(src, dst); |
| emit(0x89); |
| emit_operand(src, dst); |
| } |
| |
| |
| void Assembler::movl(const Operand& dst, Immediate value) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(dst); |
| emit(0xC7); |
| emit_operand(0x0, dst); |
| emit(value); // Only 32-bit immediates are possible, not 8-bit immediates. |
| } |
| |
| |
| void Assembler::movl(Register dst, Immediate value) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(dst); |
| emit(0xC7); |
| emit_modrm(0x0, dst); |
| emit(value); // Only 32-bit immediates are possible, not 8-bit immediates. |
| } |
| |
| |
| void Assembler::movq(Register dst, const Operand& src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst, src); |
| emit(0x8B); |
| emit_operand(dst, src); |
| } |
| |
| |
| void Assembler::movq(Register dst, Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst, src); |
| emit(0x8B); |
| emit_modrm(dst, src); |
| } |
| |
| |
| void Assembler::movq(Register dst, Immediate value) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst); |
| emit(0xC7); |
| emit_modrm(0x0, dst); |
| emit(value); // Only 32-bit immediates are possible, not 8-bit immediates. |
| } |
| |
| |
| void Assembler::movq(const Operand& dst, Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(src, dst); |
| emit(0x89); |
| emit_operand(src, dst); |
| } |
| |
| |
| void Assembler::movq(Register dst, void* value, RelocInfo::Mode rmode) { |
| // This method must not be used with heap object references. The stored |
| // address is not GC safe. Use the handle version instead. |
| ASSERT(rmode > RelocInfo::LAST_GCED_ENUM); |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst); |
| emit(0xB8 | dst.low_bits()); |
| emitq(reinterpret_cast<uintptr_t>(value), rmode); |
| } |
| |
| |
| void Assembler::movq(Register dst, int64_t value, RelocInfo::Mode rmode) { |
| // Non-relocatable values might not need a 64-bit representation. |
| if (rmode == RelocInfo::NONE) { |
| // Sadly, there is no zero or sign extending move for 8-bit immediates. |
| if (is_int32(value)) { |
| movq(dst, Immediate(static_cast<int32_t>(value))); |
| return; |
| } else if (is_uint32(value)) { |
| movl(dst, Immediate(static_cast<int32_t>(value))); |
| return; |
| } |
| // Value cannot be represented by 32 bits, so do a full 64 bit immediate |
| // value. |
| } |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst); |
| emit(0xB8 | dst.low_bits()); |
| emitq(value, rmode); |
| } |
| |
| |
| void Assembler::movq(Register dst, ExternalReference ref) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst); |
| emit(0xB8 | dst.low_bits()); |
| emitq(reinterpret_cast<uintptr_t>(ref.address()), |
| RelocInfo::EXTERNAL_REFERENCE); |
| } |
| |
| |
| void Assembler::movq(const Operand& dst, Immediate value) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst); |
| emit(0xC7); |
| emit_operand(0, dst); |
| emit(value); |
| } |
| |
| |
| /* |
| * Loads the ip-relative location of the src label into the target |
| * location (as a 32-bit offset sign extended to 64-bit). |
| */ |
| void Assembler::movl(const Operand& dst, Label* src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(dst); |
| emit(0xC7); |
| emit_operand(0, dst); |
| if (src->is_bound()) { |
| int offset = src->pos() - pc_offset() - sizeof(int32_t); |
| ASSERT(offset <= 0); |
| emitl(offset); |
| } else if (src->is_linked()) { |
| emitl(src->pos()); |
| src->link_to(pc_offset() - sizeof(int32_t)); |
| } else { |
| ASSERT(src->is_unused()); |
| int32_t current = pc_offset(); |
| emitl(current); |
| src->link_to(current); |
| } |
| } |
| |
| |
| void Assembler::movq(Register dst, Handle<Object> value, RelocInfo::Mode mode) { |
| // If there is no relocation info, emit the value of the handle efficiently |
| // (possibly using less that 8 bytes for the value). |
| if (mode == RelocInfo::NONE) { |
| // There is no possible reason to store a heap pointer without relocation |
| // info, so it must be a smi. |
| ASSERT(value->IsSmi()); |
| // Smis never have more than 32 significant bits, but they might |
| // have garbage in the high bits. |
| movq(dst, |
| Immediate(static_cast<int32_t>(reinterpret_cast<intptr_t>(*value)))); |
| } else { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| ASSERT(value->IsHeapObject()); |
| ASSERT(!Heap::InNewSpace(*value)); |
| emit_rex_64(dst); |
| emit(0xB8 | dst.low_bits()); |
| emitq(reinterpret_cast<uintptr_t>(value.location()), mode); |
| } |
| } |
| |
| |
| void Assembler::movsxlq(Register dst, Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst, src); |
| emit(0x63); |
| emit_modrm(dst, src); |
| } |
| |
| |
| void Assembler::movsxlq(Register dst, const Operand& src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst, src); |
| emit(0x63); |
| emit_operand(dst, src); |
| } |
| |
| |
| void Assembler::movzxbq(Register dst, const Operand& src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst, src); |
| emit(0x0F); |
| emit(0xB6); |
| emit_operand(dst, src); |
| } |
| |
| |
| void Assembler::movzxbl(Register dst, const Operand& src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(dst, src); |
| emit(0x0F); |
| emit(0xB6); |
| emit_operand(dst, src); |
| } |
| |
| |
| void Assembler::movzxwl(Register dst, const Operand& src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(dst, src); |
| emit(0x0F); |
| emit(0xB7); |
| emit_operand(dst, src); |
| } |
| |
| |
| void Assembler::mul(Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(src); |
| emit(0xF7); |
| emit_modrm(0x4, src); |
| } |
| |
| |
| void Assembler::neg(Register dst) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst); |
| emit(0xF7); |
| emit_modrm(0x3, dst); |
| } |
| |
| |
| void Assembler::negl(Register dst) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(dst); |
| emit(0xF7); |
| emit_modrm(0x3, dst); |
| } |
| |
| |
| void Assembler::neg(const Operand& dst) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst); |
| emit(0xF7); |
| emit_operand(3, dst); |
| } |
| |
| |
| void Assembler::nop() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0x90); |
| } |
| |
| |
| void Assembler::not_(Register dst) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst); |
| emit(0xF7); |
| emit_modrm(0x2, dst); |
| } |
| |
| |
| void Assembler::not_(const Operand& dst) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst); |
| emit(0xF7); |
| emit_operand(2, dst); |
| } |
| |
| |
| void Assembler::nop(int n) { |
| // The recommended muti-byte sequences of NOP instructions from the Intel 64 |
| // and IA-32 Architectures Software Developer's Manual. |
| // |
| // Length Assembly Byte Sequence |
| // 2 bytes 66 NOP 66 90H |
| // 3 bytes NOP DWORD ptr [EAX] 0F 1F 00H |
| // 4 bytes NOP DWORD ptr [EAX + 00H] 0F 1F 40 00H |
| // 5 bytes NOP DWORD ptr [EAX + EAX*1 + 00H] 0F 1F 44 00 00H |
| // 6 bytes 66 NOP DWORD ptr [EAX + EAX*1 + 00H] 66 0F 1F 44 00 00H |
| // 7 bytes NOP DWORD ptr [EAX + 00000000H] 0F 1F 80 00 00 00 00H |
| // 8 bytes NOP DWORD ptr [EAX + EAX*1 + 00000000H] 0F 1F 84 00 00 00 00 00H |
| // 9 bytes 66 NOP DWORD ptr [EAX + EAX*1 + 66 0F 1F 84 00 00 00 00 |
| // 00000000H] 00H |
| |
| ASSERT(1 <= n); |
| ASSERT(n <= 9); |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| switch (n) { |
| case 1: |
| emit(0x90); |
| return; |
| case 2: |
| emit(0x66); |
| emit(0x90); |
| return; |
| case 3: |
| emit(0x0f); |
| emit(0x1f); |
| emit(0x00); |
| return; |
| case 4: |
| emit(0x0f); |
| emit(0x1f); |
| emit(0x40); |
| emit(0x00); |
| return; |
| case 5: |
| emit(0x0f); |
| emit(0x1f); |
| emit(0x44); |
| emit(0x00); |
| emit(0x00); |
| return; |
| case 6: |
| emit(0x66); |
| emit(0x0f); |
| emit(0x1f); |
| emit(0x44); |
| emit(0x00); |
| emit(0x00); |
| return; |
| case 7: |
| emit(0x0f); |
| emit(0x1f); |
| emit(0x80); |
| emit(0x00); |
| emit(0x00); |
| emit(0x00); |
| emit(0x00); |
| return; |
| case 8: |
| emit(0x0f); |
| emit(0x1f); |
| emit(0x84); |
| emit(0x00); |
| emit(0x00); |
| emit(0x00); |
| emit(0x00); |
| emit(0x00); |
| return; |
| case 9: |
| emit(0x66); |
| emit(0x0f); |
| emit(0x1f); |
| emit(0x84); |
| emit(0x00); |
| emit(0x00); |
| emit(0x00); |
| emit(0x00); |
| emit(0x00); |
| return; |
| } |
| } |
| |
| |
| void Assembler::pop(Register dst) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| if (dst.high_bit()) { |
| emit_rex_64(dst); |
| } |
| emit(0x58 | dst.low_bits()); |
| } |
| |
| |
| void Assembler::pop(const Operand& dst) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst); // Could be omitted in some cases. |
| emit(0x8F); |
| emit_operand(0, dst); |
| } |
| |
| |
| void Assembler::popfq() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0x9D); |
| } |
| |
| |
| void Assembler::push(Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| if (src.high_bit()) { |
| emit_rex_64(src); |
| } |
| emit(0x50 | src.low_bits()); |
| } |
| |
| |
| void Assembler::push(const Operand& src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(src); // Could be omitted in some cases. |
| emit(0xFF); |
| emit_operand(6, src); |
| } |
| |
| |
| void Assembler::push(Immediate value) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| if (is_int8(value.value_)) { |
| emit(0x6A); |
| emit(value.value_); // Emit low byte of value. |
| } else { |
| emit(0x68); |
| emitl(value.value_); |
| } |
| } |
| |
| |
| void Assembler::pushfq() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0x9C); |
| } |
| |
| |
| void Assembler::rcl(Register dst, uint8_t imm8) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| ASSERT(is_uint6(imm8)); // illegal shift count |
| if (imm8 == 1) { |
| emit_rex_64(dst); |
| emit(0xD1); |
| emit_modrm(0x2, dst); |
| } else { |
| emit_rex_64(dst); |
| emit(0xC1); |
| emit_modrm(0x2, dst); |
| emit(imm8); |
| } |
| } |
| |
| void Assembler::rdtsc() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0x0F); |
| emit(0x31); |
| } |
| |
| |
| void Assembler::ret(int imm16) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| ASSERT(is_uint16(imm16)); |
| if (imm16 == 0) { |
| emit(0xC3); |
| } else { |
| emit(0xC2); |
| emit(imm16 & 0xFF); |
| emit((imm16 >> 8) & 0xFF); |
| } |
| } |
| |
| |
| void Assembler::setcc(Condition cc, Register reg) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| ASSERT(is_uint4(cc)); |
| if (reg.code() > 3) { // Use x64 byte registers, where different. |
| emit_rex_32(reg); |
| } |
| emit(0x0F); |
| emit(0x90 | cc); |
| emit_modrm(0x0, reg); |
| } |
| |
| |
| void Assembler::shld(Register dst, Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(src, dst); |
| emit(0x0F); |
| emit(0xA5); |
| emit_modrm(src, dst); |
| } |
| |
| |
| void Assembler::shrd(Register dst, Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(src, dst); |
| emit(0x0F); |
| emit(0xAD); |
| emit_modrm(src, dst); |
| } |
| |
| |
| void Assembler::xchg(Register dst, Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| if (src.is(rax) || dst.is(rax)) { // Single-byte encoding |
| Register other = src.is(rax) ? dst : src; |
| emit_rex_64(other); |
| emit(0x90 | other.low_bits()); |
| } else { |
| emit_rex_64(src, dst); |
| emit(0x87); |
| emit_modrm(src, dst); |
| } |
| } |
| |
| |
| void Assembler::store_rax(void* dst, RelocInfo::Mode mode) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0x48); // REX.W |
| emit(0xA3); |
| emitq(reinterpret_cast<uintptr_t>(dst), mode); |
| } |
| |
| |
| void Assembler::store_rax(ExternalReference ref) { |
| store_rax(ref.address(), RelocInfo::EXTERNAL_REFERENCE); |
| } |
| |
| |
| void Assembler::testb(Register reg, Immediate mask) { |
| ASSERT(is_int8(mask.value_) || is_uint8(mask.value_)); |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| if (reg.is(rax)) { |
| emit(0xA8); |
| emit(mask.value_); // Low byte emitted. |
| } else { |
| if (reg.code() > 3) { |
| // Register is not one of al, bl, cl, dl. Its encoding needs REX. |
| emit_rex_32(reg); |
| } |
| emit(0xF6); |
| emit_modrm(0x0, reg); |
| emit(mask.value_); // Low byte emitted. |
| } |
| } |
| |
| |
| void Assembler::testb(const Operand& op, Immediate mask) { |
| ASSERT(is_int8(mask.value_) || is_uint8(mask.value_)); |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(rax, op); |
| emit(0xF6); |
| emit_operand(rax, op); // Operation code 0 |
| emit(mask.value_); // Low byte emitted. |
| } |
| |
| |
| void Assembler::testl(Register dst, Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(dst, src); |
| emit(0x85); |
| emit_modrm(dst, src); |
| } |
| |
| |
| void Assembler::testl(Register reg, Immediate mask) { |
| // testl with a mask that fits in the low byte is exactly testb. |
| if (is_uint8(mask.value_)) { |
| testb(reg, mask); |
| return; |
| } |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| if (reg.is(rax)) { |
| emit(0xA9); |
| emit(mask); |
| } else { |
| emit_optional_rex_32(rax, reg); |
| emit(0xF7); |
| emit_modrm(0x0, reg); |
| emit(mask); |
| } |
| } |
| |
| |
| void Assembler::testl(const Operand& op, Immediate mask) { |
| // testl with a mask that fits in the low byte is exactly testb. |
| if (is_uint8(mask.value_)) { |
| testb(op, mask); |
| return; |
| } |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(rax, op); |
| emit(0xF7); |
| emit_operand(rax, op); // Operation code 0 |
| emit(mask); |
| } |
| |
| |
| void Assembler::testq(const Operand& op, Register reg) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(reg, op); |
| emit(0x85); |
| emit_operand(reg, op); |
| } |
| |
| |
| void Assembler::testq(Register dst, Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_rex_64(dst, src); |
| emit(0x85); |
| emit_modrm(dst, src); |
| } |
| |
| |
| void Assembler::testq(Register dst, Immediate mask) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| if (dst.is(rax)) { |
| emit_rex_64(); |
| emit(0xA9); |
| emit(mask); |
| } else { |
| emit_rex_64(dst); |
| emit(0xF7); |
| emit_modrm(0, dst); |
| emit(mask); |
| } |
| } |
| |
| |
| // FPU instructions |
| |
| |
| void Assembler::fld(int i) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_farith(0xD9, 0xC0, i); |
| } |
| |
| |
| void Assembler::fld1() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xD9); |
| emit(0xE8); |
| } |
| |
| |
| void Assembler::fldz() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xD9); |
| emit(0xEE); |
| } |
| |
| |
| void Assembler::fld_s(const Operand& adr) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(adr); |
| emit(0xD9); |
| emit_operand(0, adr); |
| } |
| |
| |
| void Assembler::fld_d(const Operand& adr) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(adr); |
| emit(0xDD); |
| emit_operand(0, adr); |
| } |
| |
| |
| void Assembler::fstp_s(const Operand& adr) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(adr); |
| emit(0xD9); |
| emit_operand(3, adr); |
| } |
| |
| |
| void Assembler::fstp_d(const Operand& adr) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(adr); |
| emit(0xDD); |
| emit_operand(3, adr); |
| } |
| |
| |
| void Assembler::fild_s(const Operand& adr) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(adr); |
| emit(0xDB); |
| emit_operand(0, adr); |
| } |
| |
| |
| void Assembler::fild_d(const Operand& adr) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(adr); |
| emit(0xDF); |
| emit_operand(5, adr); |
| } |
| |
| |
| void Assembler::fistp_s(const Operand& adr) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(adr); |
| emit(0xDB); |
| emit_operand(3, adr); |
| } |
| |
| |
| void Assembler::fisttp_s(const Operand& adr) { |
| ASSERT(CpuFeatures::IsEnabled(CpuFeatures::SSE3)); |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(adr); |
| emit(0xDB); |
| emit_operand(1, adr); |
| } |
| |
| |
| void Assembler::fist_s(const Operand& adr) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(adr); |
| emit(0xDB); |
| emit_operand(2, adr); |
| } |
| |
| |
| void Assembler::fistp_d(const Operand& adr) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(adr); |
| emit(0xDF); |
| emit_operand(8, adr); |
| } |
| |
| |
| void Assembler::fabs() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xD9); |
| emit(0xE1); |
| } |
| |
| |
| void Assembler::fchs() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xD9); |
| emit(0xE0); |
| } |
| |
| |
| void Assembler::fcos() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xD9); |
| emit(0xFF); |
| } |
| |
| |
| void Assembler::fsin() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xD9); |
| emit(0xFE); |
| } |
| |
| |
| void Assembler::fadd(int i) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_farith(0xDC, 0xC0, i); |
| } |
| |
| |
| void Assembler::fsub(int i) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_farith(0xDC, 0xE8, i); |
| } |
| |
| |
| void Assembler::fisub_s(const Operand& adr) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_optional_rex_32(adr); |
| emit(0xDA); |
| emit_operand(4, adr); |
| } |
| |
| |
| void Assembler::fmul(int i) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_farith(0xDC, 0xC8, i); |
| } |
| |
| |
| void Assembler::fdiv(int i) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_farith(0xDC, 0xF8, i); |
| } |
| |
| |
| void Assembler::faddp(int i) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_farith(0xDE, 0xC0, i); |
| } |
| |
| |
| void Assembler::fsubp(int i) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_farith(0xDE, 0xE8, i); |
| } |
| |
| |
| void Assembler::fsubrp(int i) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_farith(0xDE, 0xE0, i); |
| } |
| |
| |
| void Assembler::fmulp(int i) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_farith(0xDE, 0xC8, i); |
| } |
| |
| |
| void Assembler::fdivp(int i) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_farith(0xDE, 0xF8, i); |
| } |
| |
| |
| void Assembler::fprem() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xD9); |
| emit(0xF8); |
| } |
| |
| |
| void Assembler::fprem1() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xD9); |
| emit(0xF5); |
| } |
| |
| |
| void Assembler::fxch(int i) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_farith(0xD9, 0xC8, i); |
| } |
| |
| |
| void Assembler::fincstp() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xD9); |
| emit(0xF7); |
| } |
| |
| |
| void Assembler::ffree(int i) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_farith(0xDD, 0xC0, i); |
| } |
| |
| |
| void Assembler::ftst() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xD9); |
| emit(0xE4); |
| } |
| |
| |
| void Assembler::fucomp(int i) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit_farith(0xDD, 0xE8, i); |
| } |
| |
| |
| void Assembler::fucompp() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xDA); |
| emit(0xE9); |
| } |
| |
| |
| void Assembler::fcompp() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xDE); |
| emit(0xD9); |
| } |
| |
| |
| void Assembler::fnstsw_ax() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xDF); |
| emit(0xE0); |
| } |
| |
| |
| void Assembler::fwait() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0x9B); |
| } |
| |
| |
| void Assembler::frndint() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xD9); |
| emit(0xFC); |
| } |
| |
| |
| void Assembler::fnclex() { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xDB); |
| emit(0xE2); |
| } |
| |
| |
| void Assembler::sahf() { |
| // TODO(X64): Test for presence. Not all 64-bit intel CPU's have sahf |
| // in 64-bit mode. Test CpuID. |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0x9E); |
| } |
| |
| |
| void Assembler::emit_farith(int b1, int b2, int i) { |
| ASSERT(is_uint8(b1) && is_uint8(b2)); // wrong opcode |
| ASSERT(is_uint3(i)); // illegal stack offset |
| emit(b1); |
| emit(b2 + i); |
| } |
| |
| // SSE 2 operations |
| |
| void Assembler::movsd(const Operand& dst, XMMRegister src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xF2); // double |
| emit_optional_rex_32(src, dst); |
| emit(0x0F); |
| emit(0x11); // store |
| emit_sse_operand(src, dst); |
| } |
| |
| |
| void Assembler::movsd(Register dst, XMMRegister src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xF2); // double |
| emit_optional_rex_32(src, dst); |
| emit(0x0F); |
| emit(0x11); // store |
| emit_sse_operand(src, dst); |
| } |
| |
| |
| void Assembler::movsd(XMMRegister dst, Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xF2); // double |
| emit_optional_rex_32(dst, src); |
| emit(0x0F); |
| emit(0x10); // load |
| emit_sse_operand(dst, src); |
| } |
| |
| |
| void Assembler::movsd(XMMRegister dst, const Operand& src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xF2); // double |
| emit_optional_rex_32(dst, src); |
| emit(0x0F); |
| emit(0x10); // load |
| emit_sse_operand(dst, src); |
| } |
| |
| |
| void Assembler::cvttss2si(Register dst, const Operand& src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xF3); |
| emit_optional_rex_32(dst, src); |
| emit(0x0F); |
| emit(0x2C); |
| emit_operand(dst, src); |
| } |
| |
| |
| void Assembler::cvttsd2si(Register dst, const Operand& src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xF2); |
| emit_optional_rex_32(dst, src); |
| emit(0x0F); |
| emit(0x2C); |
| emit_operand(dst, src); |
| } |
| |
| |
| void Assembler::cvtlsi2sd(XMMRegister dst, const Operand& src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xF2); |
| emit_optional_rex_32(dst, src); |
| emit(0x0F); |
| emit(0x2A); |
| emit_sse_operand(dst, src); |
| } |
| |
| |
| void Assembler::cvtlsi2sd(XMMRegister dst, Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xF2); |
| emit_optional_rex_32(dst, src); |
| emit(0x0F); |
| emit(0x2A); |
| emit_sse_operand(dst, src); |
| } |
| |
| |
| void Assembler::cvtqsi2sd(XMMRegister dst, Register src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xF2); |
| emit_rex_64(dst, src); |
| emit(0x0F); |
| emit(0x2A); |
| emit_sse_operand(dst, src); |
| } |
| |
| |
| void Assembler::addsd(XMMRegister dst, XMMRegister src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xF2); |
| emit_optional_rex_32(dst, src); |
| emit(0x0F); |
| emit(0x58); |
| emit_sse_operand(dst, src); |
| } |
| |
| |
| void Assembler::mulsd(XMMRegister dst, XMMRegister src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xF2); |
| emit_optional_rex_32(dst, src); |
| emit(0x0F); |
| emit(0x59); |
| emit_sse_operand(dst, src); |
| } |
| |
| |
| void Assembler::subsd(XMMRegister dst, XMMRegister src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xF2); |
| emit_optional_rex_32(dst, src); |
| emit(0x0F); |
| emit(0x5C); |
| emit_sse_operand(dst, src); |
| } |
| |
| |
| void Assembler::divsd(XMMRegister dst, XMMRegister src) { |
| EnsureSpace ensure_space(this); |
| last_pc_ = pc_; |
| emit(0xF2); |
| emit_optional_rex_32(dst, src); |
| emit(0x0F); |
| emit(0x5E); |
| emit_sse_operand(dst, src); |
| } |
| |
| |
| |
| void Assembler::emit_sse_operand(XMMRegister reg, const Operand& adr) { |
| Register ireg = { reg.code() }; |
| emit_operand(ireg, adr); |
| } |
| |
| |
| void Assembler::emit_sse_operand(XMMRegister dst, XMMRegister src) { |
| emit(0xC0 | (dst.low_bits() << 3) | src.low_bits()); |
| } |
| |
| void Assembler::emit_sse_operand(XMMRegister dst, Register src) { |
| emit(0xC0 | (dst.low_bits() << 3) | src.low_bits()); |
| } |
| |
| |
| // Relocation information implementations |
| |
| void Assembler::RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data) { |
| ASSERT(rmode != RelocInfo::NONE); |
| // Don't record external references unless the heap will be serialized. |
| if (rmode == RelocInfo::EXTERNAL_REFERENCE && |
| !Serializer::enabled() && |
| !FLAG_debug_code) { |
| return; |
| } |
| RelocInfo rinfo(pc_, rmode, data); |
| reloc_info_writer.Write(&rinfo); |
| } |
| |
| void Assembler::RecordJSReturn() { |
| WriteRecordedPositions(); |
| EnsureSpace ensure_space(this); |
| RecordRelocInfo(RelocInfo::JS_RETURN); |
| } |
| |
| |
| void Assembler::RecordComment(const char* msg) { |
| if (FLAG_debug_code) { |
| EnsureSpace ensure_space(this); |
| RecordRelocInfo(RelocInfo::COMMENT, reinterpret_cast<intptr_t>(msg)); |
| } |
| } |
| |
| |
| void Assembler::RecordPosition(int pos) { |
| ASSERT(pos != RelocInfo::kNoPosition); |
| ASSERT(pos >= 0); |
| current_position_ = pos; |
| } |
| |
| |
| void Assembler::RecordStatementPosition(int pos) { |
| ASSERT(pos != RelocInfo::kNoPosition); |
| ASSERT(pos >= 0); |
| current_statement_position_ = pos; |
| } |
| |
| |
| void Assembler::WriteRecordedPositions() { |
| // Write the statement position if it is different from what was written last |
| // time. |
| if (current_statement_position_ != written_statement_position_) { |
| EnsureSpace ensure_space(this); |
| RecordRelocInfo(RelocInfo::STATEMENT_POSITION, current_statement_position_); |
| written_statement_position_ = current_statement_position_; |
| } |
| |
| // Write the position if it is different from what was written last time and |
| // also different from the written statement position. |
| if (current_position_ != written_position_ && |
| current_position_ != written_statement_position_) { |
| EnsureSpace ensure_space(this); |
| RecordRelocInfo(RelocInfo::POSITION, current_position_); |
| written_position_ = current_position_; |
| } |
| } |
| |
| |
| const int RelocInfo::kApplyMask = RelocInfo::kCodeTargetMask | |
| 1 << RelocInfo::INTERNAL_REFERENCE | |
| 1 << RelocInfo::JS_RETURN; |
| |
| } } // namespace v8::internal |