9c485e182b
Support x87-only platform (ia32 without SSE) R=danno@chromium.org Review URL: https://codereview.chromium.org/293743005 Patch from Weiliang Lin <weiliang.lin@intel.com>. git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21469 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2033 lines
43 KiB
C++
2033 lines
43 KiB
C++
// Copyright (c) 1994-2006 Sun Microsystems Inc.
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// All Rights Reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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//
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// - Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// - Redistribution in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the
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// distribution.
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//
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// - Neither the name of Sun Microsystems or the names of contributors may
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// be used to endorse or promote products derived from this software without
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// specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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// OF THE POSSIBILITY OF SUCH DAMAGE.
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// The original source code covered by the above license above has been modified
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// significantly by Google Inc.
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// Copyright 2012 the V8 project authors. All rights reserved.
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#include "v8.h"
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#if V8_TARGET_ARCH_X87
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#include "disassembler.h"
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#include "macro-assembler.h"
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#include "serialize.h"
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namespace v8 {
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namespace internal {
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// -----------------------------------------------------------------------------
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// Implementation of CpuFeatures
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void CpuFeatures::ProbeImpl(bool cross_compile) {
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CPU cpu;
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// SAHF must be available in compat/legacy mode.
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CHECK(cpu.has_sahf());
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supported_ |= 1u << SAHF;
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supported_ |= OS::CpuFeaturesImpliedByPlatform();
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// Only use statically determined features for cross compile (snapshot).
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if (cross_compile) return;
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}
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void CpuFeatures::PrintTarget() { }
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void CpuFeatures::PrintFeatures() { }
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// -----------------------------------------------------------------------------
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// Implementation of Displacement
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void Displacement::init(Label* L, Type type) {
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ASSERT(!L->is_bound());
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int next = 0;
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if (L->is_linked()) {
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next = L->pos();
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ASSERT(next > 0); // Displacements must be at positions > 0
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}
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// Ensure that we _never_ overflow the next field.
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ASSERT(NextField::is_valid(Assembler::kMaximalBufferSize));
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data_ = NextField::encode(next) | TypeField::encode(type);
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}
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// -----------------------------------------------------------------------------
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// Implementation of RelocInfo
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const int RelocInfo::kApplyMask =
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RelocInfo::kCodeTargetMask | 1 << RelocInfo::RUNTIME_ENTRY |
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1 << RelocInfo::JS_RETURN | 1 << RelocInfo::INTERNAL_REFERENCE |
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1 << RelocInfo::DEBUG_BREAK_SLOT | 1 << RelocInfo::CODE_AGE_SEQUENCE;
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bool RelocInfo::IsCodedSpecially() {
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// The deserializer needs to know whether a pointer is specially coded. Being
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// specially coded on IA32 means that it is a relative address, as used by
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// branch instructions. These are also the ones that need changing when a
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// code object moves.
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return (1 << rmode_) & kApplyMask;
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}
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bool RelocInfo::IsInConstantPool() {
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return false;
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}
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void RelocInfo::PatchCode(byte* instructions, int instruction_count) {
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// Patch the code at the current address with the supplied instructions.
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for (int i = 0; i < instruction_count; i++) {
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*(pc_ + i) = *(instructions + i);
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}
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// Indicate that code has changed.
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CPU::FlushICache(pc_, instruction_count);
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}
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// Patch the code at the current PC with a call to the target address.
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// Additional guard int3 instructions can be added if required.
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void RelocInfo::PatchCodeWithCall(Address target, int guard_bytes) {
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// Call instruction takes up 5 bytes and int3 takes up one byte.
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static const int kCallCodeSize = 5;
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int code_size = kCallCodeSize + guard_bytes;
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// Create a code patcher.
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CodePatcher patcher(pc_, code_size);
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// Add a label for checking the size of the code used for returning.
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#ifdef DEBUG
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Label check_codesize;
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patcher.masm()->bind(&check_codesize);
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#endif
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// Patch the code.
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patcher.masm()->call(target, RelocInfo::NONE32);
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// Check that the size of the code generated is as expected.
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ASSERT_EQ(kCallCodeSize,
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patcher.masm()->SizeOfCodeGeneratedSince(&check_codesize));
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// Add the requested number of int3 instructions after the call.
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ASSERT_GE(guard_bytes, 0);
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for (int i = 0; i < guard_bytes; i++) {
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patcher.masm()->int3();
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}
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}
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// -----------------------------------------------------------------------------
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// Implementation of Operand
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Operand::Operand(Register base, int32_t disp, RelocInfo::Mode rmode) {
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// [base + disp/r]
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if (disp == 0 && RelocInfo::IsNone(rmode) && !base.is(ebp)) {
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// [base]
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set_modrm(0, base);
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if (base.is(esp)) set_sib(times_1, esp, base);
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} else if (is_int8(disp) && RelocInfo::IsNone(rmode)) {
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// [base + disp8]
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set_modrm(1, base);
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if (base.is(esp)) set_sib(times_1, esp, base);
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set_disp8(disp);
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} else {
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// [base + disp/r]
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set_modrm(2, base);
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if (base.is(esp)) set_sib(times_1, esp, base);
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set_dispr(disp, rmode);
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}
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}
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Operand::Operand(Register base,
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Register index,
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ScaleFactor scale,
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int32_t disp,
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RelocInfo::Mode rmode) {
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ASSERT(!index.is(esp)); // illegal addressing mode
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// [base + index*scale + disp/r]
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if (disp == 0 && RelocInfo::IsNone(rmode) && !base.is(ebp)) {
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// [base + index*scale]
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set_modrm(0, esp);
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set_sib(scale, index, base);
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} else if (is_int8(disp) && RelocInfo::IsNone(rmode)) {
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// [base + index*scale + disp8]
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set_modrm(1, esp);
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set_sib(scale, index, base);
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set_disp8(disp);
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} else {
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// [base + index*scale + disp/r]
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set_modrm(2, esp);
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set_sib(scale, index, base);
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set_dispr(disp, rmode);
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}
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}
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Operand::Operand(Register index,
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ScaleFactor scale,
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int32_t disp,
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RelocInfo::Mode rmode) {
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ASSERT(!index.is(esp)); // illegal addressing mode
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// [index*scale + disp/r]
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set_modrm(0, esp);
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set_sib(scale, index, ebp);
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set_dispr(disp, rmode);
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}
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bool Operand::is_reg(Register reg) const {
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return ((buf_[0] & 0xF8) == 0xC0) // addressing mode is register only.
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&& ((buf_[0] & 0x07) == reg.code()); // register codes match.
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}
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bool Operand::is_reg_only() const {
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return (buf_[0] & 0xF8) == 0xC0; // Addressing mode is register only.
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}
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Register Operand::reg() const {
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ASSERT(is_reg_only());
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return Register::from_code(buf_[0] & 0x07);
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}
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// -----------------------------------------------------------------------------
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// Implementation of Assembler.
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// Emit a single byte. Must always be inlined.
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#define EMIT(x) \
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*pc_++ = (x)
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#ifdef GENERATED_CODE_COVERAGE
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static void InitCoverageLog();
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#endif
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Assembler::Assembler(Isolate* isolate, void* buffer, int buffer_size)
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: AssemblerBase(isolate, buffer, buffer_size),
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positions_recorder_(this) {
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// Clear the buffer in debug mode unless it was provided by the
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// caller in which case we can't be sure it's okay to overwrite
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// existing code in it; see CodePatcher::CodePatcher(...).
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#ifdef DEBUG
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if (own_buffer_) {
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memset(buffer_, 0xCC, buffer_size_); // int3
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}
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#endif
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reloc_info_writer.Reposition(buffer_ + buffer_size_, pc_);
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#ifdef GENERATED_CODE_COVERAGE
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InitCoverageLog();
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#endif
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}
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void Assembler::GetCode(CodeDesc* desc) {
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// Finalize code (at this point overflow() may be true, but the gap ensures
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// that we are still not overlapping instructions and relocation info).
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ASSERT(pc_ <= reloc_info_writer.pos()); // No overlap.
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// Set up code descriptor.
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desc->buffer = buffer_;
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desc->buffer_size = buffer_size_;
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desc->instr_size = pc_offset();
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desc->reloc_size = (buffer_ + buffer_size_) - reloc_info_writer.pos();
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desc->origin = this;
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}
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void Assembler::Align(int m) {
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ASSERT(IsPowerOf2(m));
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int mask = m - 1;
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int addr = pc_offset();
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Nop((m - (addr & mask)) & mask);
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}
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bool Assembler::IsNop(Address addr) {
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Address a = addr;
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while (*a == 0x66) a++;
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if (*a == 0x90) return true;
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if (a[0] == 0xf && a[1] == 0x1f) return true;
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return false;
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}
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void Assembler::Nop(int bytes) {
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EnsureSpace ensure_space(this);
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// Older CPUs that do not support SSE2 may not support multibyte NOP
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// instructions.
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for (; bytes > 0; bytes--) {
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EMIT(0x90);
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}
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return;
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}
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void Assembler::CodeTargetAlign() {
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Align(16); // Preferred alignment of jump targets on ia32.
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}
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void Assembler::cpuid() {
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EnsureSpace ensure_space(this);
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EMIT(0x0F);
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EMIT(0xA2);
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}
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void Assembler::pushad() {
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EnsureSpace ensure_space(this);
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EMIT(0x60);
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}
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void Assembler::popad() {
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EnsureSpace ensure_space(this);
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EMIT(0x61);
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}
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void Assembler::pushfd() {
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EnsureSpace ensure_space(this);
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EMIT(0x9C);
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}
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void Assembler::popfd() {
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EnsureSpace ensure_space(this);
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EMIT(0x9D);
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}
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void Assembler::push(const Immediate& x) {
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EnsureSpace ensure_space(this);
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if (x.is_int8()) {
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EMIT(0x6a);
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EMIT(x.x_);
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} else {
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EMIT(0x68);
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emit(x);
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}
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}
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void Assembler::push_imm32(int32_t imm32) {
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EnsureSpace ensure_space(this);
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EMIT(0x68);
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emit(imm32);
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}
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void Assembler::push(Register src) {
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EnsureSpace ensure_space(this);
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EMIT(0x50 | src.code());
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}
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void Assembler::push(const Operand& src) {
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EnsureSpace ensure_space(this);
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EMIT(0xFF);
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emit_operand(esi, src);
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}
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void Assembler::pop(Register dst) {
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ASSERT(reloc_info_writer.last_pc() != NULL);
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EnsureSpace ensure_space(this);
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EMIT(0x58 | dst.code());
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}
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void Assembler::pop(const Operand& dst) {
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EnsureSpace ensure_space(this);
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EMIT(0x8F);
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emit_operand(eax, dst);
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}
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void Assembler::enter(const Immediate& size) {
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EnsureSpace ensure_space(this);
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EMIT(0xC8);
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emit_w(size);
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EMIT(0);
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}
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void Assembler::leave() {
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EnsureSpace ensure_space(this);
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EMIT(0xC9);
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}
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void Assembler::mov_b(Register dst, const Operand& src) {
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CHECK(dst.is_byte_register());
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EnsureSpace ensure_space(this);
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EMIT(0x8A);
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emit_operand(dst, src);
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}
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void Assembler::mov_b(const Operand& dst, int8_t imm8) {
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EnsureSpace ensure_space(this);
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EMIT(0xC6);
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emit_operand(eax, dst);
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EMIT(imm8);
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}
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void Assembler::mov_b(const Operand& dst, Register src) {
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CHECK(src.is_byte_register());
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EnsureSpace ensure_space(this);
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EMIT(0x88);
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emit_operand(src, dst);
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}
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void Assembler::mov_w(Register dst, const Operand& src) {
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EnsureSpace ensure_space(this);
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EMIT(0x66);
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EMIT(0x8B);
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emit_operand(dst, src);
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}
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void Assembler::mov_w(const Operand& dst, Register src) {
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EnsureSpace ensure_space(this);
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EMIT(0x66);
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EMIT(0x89);
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emit_operand(src, dst);
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}
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void Assembler::mov_w(const Operand& dst, int16_t imm16) {
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EnsureSpace ensure_space(this);
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EMIT(0x66);
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EMIT(0xC7);
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emit_operand(eax, dst);
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EMIT(static_cast<int8_t>(imm16 & 0xff));
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EMIT(static_cast<int8_t>(imm16 >> 8));
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}
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void Assembler::mov(Register dst, int32_t imm32) {
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EnsureSpace ensure_space(this);
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EMIT(0xB8 | dst.code());
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emit(imm32);
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}
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void Assembler::mov(Register dst, const Immediate& x) {
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EnsureSpace ensure_space(this);
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EMIT(0xB8 | dst.code());
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emit(x);
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}
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void Assembler::mov(Register dst, Handle<Object> handle) {
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EnsureSpace ensure_space(this);
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EMIT(0xB8 | dst.code());
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emit(handle);
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}
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void Assembler::mov(Register dst, const Operand& src) {
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EnsureSpace ensure_space(this);
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EMIT(0x8B);
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emit_operand(dst, src);
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}
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void Assembler::mov(Register dst, Register src) {
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EnsureSpace ensure_space(this);
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EMIT(0x89);
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EMIT(0xC0 | src.code() << 3 | dst.code());
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}
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void Assembler::mov(const Operand& dst, const Immediate& x) {
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EnsureSpace ensure_space(this);
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EMIT(0xC7);
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emit_operand(eax, dst);
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emit(x);
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}
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void Assembler::mov(const Operand& dst, Handle<Object> handle) {
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EnsureSpace ensure_space(this);
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EMIT(0xC7);
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emit_operand(eax, dst);
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emit(handle);
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}
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void Assembler::mov(const Operand& dst, Register src) {
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EnsureSpace ensure_space(this);
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EMIT(0x89);
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emit_operand(src, dst);
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}
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void Assembler::movsx_b(Register dst, const Operand& src) {
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EnsureSpace ensure_space(this);
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EMIT(0x0F);
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EMIT(0xBE);
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emit_operand(dst, src);
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}
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void Assembler::movsx_w(Register dst, const Operand& src) {
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EnsureSpace ensure_space(this);
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EMIT(0x0F);
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EMIT(0xBF);
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emit_operand(dst, src);
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}
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void Assembler::movzx_b(Register dst, const Operand& src) {
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EnsureSpace ensure_space(this);
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EMIT(0x0F);
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EMIT(0xB6);
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emit_operand(dst, src);
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}
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void Assembler::movzx_w(Register dst, const Operand& src) {
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EnsureSpace ensure_space(this);
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EMIT(0x0F);
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EMIT(0xB7);
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emit_operand(dst, src);
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}
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void Assembler::cld() {
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EnsureSpace ensure_space(this);
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EMIT(0xFC);
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}
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void Assembler::rep_movs() {
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EnsureSpace ensure_space(this);
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EMIT(0xF3);
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EMIT(0xA5);
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}
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void Assembler::rep_stos() {
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EnsureSpace ensure_space(this);
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EMIT(0xF3);
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EMIT(0xAB);
|
|
}
|
|
|
|
|
|
void Assembler::stos() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xAB);
|
|
}
|
|
|
|
|
|
void Assembler::xchg(Register dst, Register src) {
|
|
EnsureSpace ensure_space(this);
|
|
if (src.is(eax) || dst.is(eax)) { // Single-byte encoding.
|
|
EMIT(0x90 | (src.is(eax) ? dst.code() : src.code()));
|
|
} else {
|
|
EMIT(0x87);
|
|
EMIT(0xC0 | src.code() << 3 | dst.code());
|
|
}
|
|
}
|
|
|
|
|
|
void Assembler::adc(Register dst, int32_t imm32) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_arith(2, Operand(dst), Immediate(imm32));
|
|
}
|
|
|
|
|
|
void Assembler::adc(Register dst, const Operand& src) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x13);
|
|
emit_operand(dst, src);
|
|
}
|
|
|
|
|
|
void Assembler::add(Register dst, const Operand& src) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x03);
|
|
emit_operand(dst, src);
|
|
}
|
|
|
|
|
|
void Assembler::add(const Operand& dst, Register src) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x01);
|
|
emit_operand(src, dst);
|
|
}
|
|
|
|
|
|
void Assembler::add(const Operand& dst, const Immediate& x) {
|
|
ASSERT(reloc_info_writer.last_pc() != NULL);
|
|
EnsureSpace ensure_space(this);
|
|
emit_arith(0, dst, x);
|
|
}
|
|
|
|
|
|
void Assembler::and_(Register dst, int32_t imm32) {
|
|
and_(dst, Immediate(imm32));
|
|
}
|
|
|
|
|
|
void Assembler::and_(Register dst, const Immediate& x) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_arith(4, Operand(dst), x);
|
|
}
|
|
|
|
|
|
void Assembler::and_(Register dst, const Operand& src) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x23);
|
|
emit_operand(dst, src);
|
|
}
|
|
|
|
|
|
void Assembler::and_(const Operand& dst, const Immediate& x) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_arith(4, dst, x);
|
|
}
|
|
|
|
|
|
void Assembler::and_(const Operand& dst, Register src) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x21);
|
|
emit_operand(src, dst);
|
|
}
|
|
|
|
|
|
void Assembler::cmpb(const Operand& op, int8_t imm8) {
|
|
EnsureSpace ensure_space(this);
|
|
if (op.is_reg(eax)) {
|
|
EMIT(0x3C);
|
|
} else {
|
|
EMIT(0x80);
|
|
emit_operand(edi, op); // edi == 7
|
|
}
|
|
EMIT(imm8);
|
|
}
|
|
|
|
|
|
void Assembler::cmpb(const Operand& op, Register reg) {
|
|
CHECK(reg.is_byte_register());
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x38);
|
|
emit_operand(reg, op);
|
|
}
|
|
|
|
|
|
void Assembler::cmpb(Register reg, const Operand& op) {
|
|
CHECK(reg.is_byte_register());
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x3A);
|
|
emit_operand(reg, op);
|
|
}
|
|
|
|
|
|
void Assembler::cmpw(const Operand& op, Immediate imm16) {
|
|
ASSERT(imm16.is_int16());
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x66);
|
|
EMIT(0x81);
|
|
emit_operand(edi, op);
|
|
emit_w(imm16);
|
|
}
|
|
|
|
|
|
void Assembler::cmp(Register reg, int32_t imm32) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_arith(7, Operand(reg), Immediate(imm32));
|
|
}
|
|
|
|
|
|
void Assembler::cmp(Register reg, Handle<Object> handle) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_arith(7, Operand(reg), Immediate(handle));
|
|
}
|
|
|
|
|
|
void Assembler::cmp(Register reg, const Operand& op) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x3B);
|
|
emit_operand(reg, op);
|
|
}
|
|
|
|
|
|
void Assembler::cmp(const Operand& op, const Immediate& imm) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_arith(7, op, imm);
|
|
}
|
|
|
|
|
|
void Assembler::cmp(const Operand& op, Handle<Object> handle) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_arith(7, op, Immediate(handle));
|
|
}
|
|
|
|
|
|
void Assembler::cmpb_al(const Operand& op) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x38); // CMP r/m8, r8
|
|
emit_operand(eax, op); // eax has same code as register al.
|
|
}
|
|
|
|
|
|
void Assembler::cmpw_ax(const Operand& op) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x66);
|
|
EMIT(0x39); // CMP r/m16, r16
|
|
emit_operand(eax, op); // eax has same code as register ax.
|
|
}
|
|
|
|
|
|
void Assembler::dec_b(Register dst) {
|
|
CHECK(dst.is_byte_register());
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xFE);
|
|
EMIT(0xC8 | dst.code());
|
|
}
|
|
|
|
|
|
void Assembler::dec_b(const Operand& dst) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xFE);
|
|
emit_operand(ecx, dst);
|
|
}
|
|
|
|
|
|
void Assembler::dec(Register dst) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x48 | dst.code());
|
|
}
|
|
|
|
|
|
void Assembler::dec(const Operand& dst) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xFF);
|
|
emit_operand(ecx, dst);
|
|
}
|
|
|
|
|
|
void Assembler::cdq() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x99);
|
|
}
|
|
|
|
|
|
void Assembler::idiv(Register src) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xF7);
|
|
EMIT(0xF8 | src.code());
|
|
}
|
|
|
|
|
|
void Assembler::imul(Register reg) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xF7);
|
|
EMIT(0xE8 | reg.code());
|
|
}
|
|
|
|
|
|
void Assembler::imul(Register dst, const Operand& src) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x0F);
|
|
EMIT(0xAF);
|
|
emit_operand(dst, src);
|
|
}
|
|
|
|
|
|
void Assembler::imul(Register dst, Register src, int32_t imm32) {
|
|
EnsureSpace ensure_space(this);
|
|
if (is_int8(imm32)) {
|
|
EMIT(0x6B);
|
|
EMIT(0xC0 | dst.code() << 3 | src.code());
|
|
EMIT(imm32);
|
|
} else {
|
|
EMIT(0x69);
|
|
EMIT(0xC0 | dst.code() << 3 | src.code());
|
|
emit(imm32);
|
|
}
|
|
}
|
|
|
|
|
|
void Assembler::inc(Register dst) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x40 | dst.code());
|
|
}
|
|
|
|
|
|
void Assembler::inc(const Operand& dst) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xFF);
|
|
emit_operand(eax, dst);
|
|
}
|
|
|
|
|
|
void Assembler::lea(Register dst, const Operand& src) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x8D);
|
|
emit_operand(dst, src);
|
|
}
|
|
|
|
|
|
void Assembler::mul(Register src) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xF7);
|
|
EMIT(0xE0 | src.code());
|
|
}
|
|
|
|
|
|
void Assembler::neg(Register dst) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xF7);
|
|
EMIT(0xD8 | dst.code());
|
|
}
|
|
|
|
|
|
void Assembler::not_(Register dst) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xF7);
|
|
EMIT(0xD0 | dst.code());
|
|
}
|
|
|
|
|
|
void Assembler::or_(Register dst, int32_t imm32) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_arith(1, Operand(dst), Immediate(imm32));
|
|
}
|
|
|
|
|
|
void Assembler::or_(Register dst, const Operand& src) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x0B);
|
|
emit_operand(dst, src);
|
|
}
|
|
|
|
|
|
void Assembler::or_(const Operand& dst, const Immediate& x) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_arith(1, dst, x);
|
|
}
|
|
|
|
|
|
void Assembler::or_(const Operand& dst, Register src) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x09);
|
|
emit_operand(src, dst);
|
|
}
|
|
|
|
|
|
void Assembler::rcl(Register dst, uint8_t imm8) {
|
|
EnsureSpace ensure_space(this);
|
|
ASSERT(is_uint5(imm8)); // illegal shift count
|
|
if (imm8 == 1) {
|
|
EMIT(0xD1);
|
|
EMIT(0xD0 | dst.code());
|
|
} else {
|
|
EMIT(0xC1);
|
|
EMIT(0xD0 | dst.code());
|
|
EMIT(imm8);
|
|
}
|
|
}
|
|
|
|
|
|
void Assembler::rcr(Register dst, uint8_t imm8) {
|
|
EnsureSpace ensure_space(this);
|
|
ASSERT(is_uint5(imm8)); // illegal shift count
|
|
if (imm8 == 1) {
|
|
EMIT(0xD1);
|
|
EMIT(0xD8 | dst.code());
|
|
} else {
|
|
EMIT(0xC1);
|
|
EMIT(0xD8 | dst.code());
|
|
EMIT(imm8);
|
|
}
|
|
}
|
|
|
|
|
|
void Assembler::ror(Register dst, uint8_t imm8) {
|
|
EnsureSpace ensure_space(this);
|
|
ASSERT(is_uint5(imm8)); // illegal shift count
|
|
if (imm8 == 1) {
|
|
EMIT(0xD1);
|
|
EMIT(0xC8 | dst.code());
|
|
} else {
|
|
EMIT(0xC1);
|
|
EMIT(0xC8 | dst.code());
|
|
EMIT(imm8);
|
|
}
|
|
}
|
|
|
|
|
|
void Assembler::ror_cl(Register dst) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD3);
|
|
EMIT(0xC8 | dst.code());
|
|
}
|
|
|
|
|
|
void Assembler::sar(Register dst, uint8_t imm8) {
|
|
EnsureSpace ensure_space(this);
|
|
ASSERT(is_uint5(imm8)); // illegal shift count
|
|
if (imm8 == 1) {
|
|
EMIT(0xD1);
|
|
EMIT(0xF8 | dst.code());
|
|
} else {
|
|
EMIT(0xC1);
|
|
EMIT(0xF8 | dst.code());
|
|
EMIT(imm8);
|
|
}
|
|
}
|
|
|
|
|
|
void Assembler::sar_cl(Register dst) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD3);
|
|
EMIT(0xF8 | dst.code());
|
|
}
|
|
|
|
|
|
void Assembler::sbb(Register dst, const Operand& src) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x1B);
|
|
emit_operand(dst, src);
|
|
}
|
|
|
|
|
|
void Assembler::shld(Register dst, const Operand& src) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x0F);
|
|
EMIT(0xA5);
|
|
emit_operand(dst, src);
|
|
}
|
|
|
|
|
|
void Assembler::shl(Register dst, uint8_t imm8) {
|
|
EnsureSpace ensure_space(this);
|
|
ASSERT(is_uint5(imm8)); // illegal shift count
|
|
if (imm8 == 1) {
|
|
EMIT(0xD1);
|
|
EMIT(0xE0 | dst.code());
|
|
} else {
|
|
EMIT(0xC1);
|
|
EMIT(0xE0 | dst.code());
|
|
EMIT(imm8);
|
|
}
|
|
}
|
|
|
|
|
|
void Assembler::shl_cl(Register dst) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD3);
|
|
EMIT(0xE0 | dst.code());
|
|
}
|
|
|
|
|
|
void Assembler::shrd(Register dst, const Operand& src) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x0F);
|
|
EMIT(0xAD);
|
|
emit_operand(dst, src);
|
|
}
|
|
|
|
|
|
void Assembler::shr(Register dst, uint8_t imm8) {
|
|
EnsureSpace ensure_space(this);
|
|
ASSERT(is_uint5(imm8)); // illegal shift count
|
|
if (imm8 == 1) {
|
|
EMIT(0xD1);
|
|
EMIT(0xE8 | dst.code());
|
|
} else {
|
|
EMIT(0xC1);
|
|
EMIT(0xE8 | dst.code());
|
|
EMIT(imm8);
|
|
}
|
|
}
|
|
|
|
|
|
void Assembler::shr_cl(Register dst) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD3);
|
|
EMIT(0xE8 | dst.code());
|
|
}
|
|
|
|
|
|
void Assembler::sub(const Operand& dst, const Immediate& x) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_arith(5, dst, x);
|
|
}
|
|
|
|
|
|
void Assembler::sub(Register dst, const Operand& src) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x2B);
|
|
emit_operand(dst, src);
|
|
}
|
|
|
|
|
|
void Assembler::sub(const Operand& dst, Register src) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x29);
|
|
emit_operand(src, dst);
|
|
}
|
|
|
|
|
|
void Assembler::test(Register reg, const Immediate& imm) {
|
|
if (RelocInfo::IsNone(imm.rmode_) && is_uint8(imm.x_)) {
|
|
test_b(reg, imm.x_);
|
|
return;
|
|
}
|
|
|
|
EnsureSpace ensure_space(this);
|
|
// This is not using emit_arith because test doesn't support
|
|
// sign-extension of 8-bit operands.
|
|
if (reg.is(eax)) {
|
|
EMIT(0xA9);
|
|
} else {
|
|
EMIT(0xF7);
|
|
EMIT(0xC0 | reg.code());
|
|
}
|
|
emit(imm);
|
|
}
|
|
|
|
|
|
void Assembler::test(Register reg, const Operand& op) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x85);
|
|
emit_operand(reg, op);
|
|
}
|
|
|
|
|
|
void Assembler::test_b(Register reg, const Operand& op) {
|
|
CHECK(reg.is_byte_register());
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x84);
|
|
emit_operand(reg, op);
|
|
}
|
|
|
|
|
|
void Assembler::test(const Operand& op, const Immediate& imm) {
|
|
if (op.is_reg_only()) {
|
|
test(op.reg(), imm);
|
|
return;
|
|
}
|
|
if (RelocInfo::IsNone(imm.rmode_) && is_uint8(imm.x_)) {
|
|
return test_b(op, imm.x_);
|
|
}
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xF7);
|
|
emit_operand(eax, op);
|
|
emit(imm);
|
|
}
|
|
|
|
|
|
void Assembler::test_b(Register reg, uint8_t imm8) {
|
|
EnsureSpace ensure_space(this);
|
|
// Only use test against byte for registers that have a byte
|
|
// variant: eax, ebx, ecx, and edx.
|
|
if (reg.is(eax)) {
|
|
EMIT(0xA8);
|
|
EMIT(imm8);
|
|
} else if (reg.is_byte_register()) {
|
|
emit_arith_b(0xF6, 0xC0, reg, imm8);
|
|
} else {
|
|
EMIT(0xF7);
|
|
EMIT(0xC0 | reg.code());
|
|
emit(imm8);
|
|
}
|
|
}
|
|
|
|
|
|
void Assembler::test_b(const Operand& op, uint8_t imm8) {
|
|
if (op.is_reg_only()) {
|
|
test_b(op.reg(), imm8);
|
|
return;
|
|
}
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xF6);
|
|
emit_operand(eax, op);
|
|
EMIT(imm8);
|
|
}
|
|
|
|
|
|
void Assembler::xor_(Register dst, int32_t imm32) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_arith(6, Operand(dst), Immediate(imm32));
|
|
}
|
|
|
|
|
|
void Assembler::xor_(Register dst, const Operand& src) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x33);
|
|
emit_operand(dst, src);
|
|
}
|
|
|
|
|
|
void Assembler::xor_(const Operand& dst, Register src) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x31);
|
|
emit_operand(src, dst);
|
|
}
|
|
|
|
|
|
void Assembler::xor_(const Operand& dst, const Immediate& x) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_arith(6, dst, x);
|
|
}
|
|
|
|
|
|
void Assembler::bt(const Operand& dst, Register src) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x0F);
|
|
EMIT(0xA3);
|
|
emit_operand(src, dst);
|
|
}
|
|
|
|
|
|
void Assembler::bts(const Operand& dst, Register src) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x0F);
|
|
EMIT(0xAB);
|
|
emit_operand(src, dst);
|
|
}
|
|
|
|
|
|
void Assembler::bsr(Register dst, const Operand& src) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x0F);
|
|
EMIT(0xBD);
|
|
emit_operand(dst, src);
|
|
}
|
|
|
|
|
|
void Assembler::hlt() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xF4);
|
|
}
|
|
|
|
|
|
void Assembler::int3() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xCC);
|
|
}
|
|
|
|
|
|
void Assembler::nop() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x90);
|
|
}
|
|
|
|
|
|
void Assembler::ret(int imm16) {
|
|
EnsureSpace ensure_space(this);
|
|
ASSERT(is_uint16(imm16));
|
|
if (imm16 == 0) {
|
|
EMIT(0xC3);
|
|
} else {
|
|
EMIT(0xC2);
|
|
EMIT(imm16 & 0xFF);
|
|
EMIT((imm16 >> 8) & 0xFF);
|
|
}
|
|
}
|
|
|
|
|
|
// Labels refer to positions in the (to be) generated code.
|
|
// There are bound, linked, and unused labels.
|
|
//
|
|
// Bound labels refer to known positions in the already
|
|
// generated code. pos() is the position the label refers to.
|
|
//
|
|
// Linked labels refer to unknown positions in the code
|
|
// to be generated; pos() is the position of the 32bit
|
|
// Displacement of the last instruction using the label.
|
|
|
|
|
|
void Assembler::print(Label* L) {
|
|
if (L->is_unused()) {
|
|
PrintF("unused label\n");
|
|
} else if (L->is_bound()) {
|
|
PrintF("bound label to %d\n", L->pos());
|
|
} else if (L->is_linked()) {
|
|
Label l = *L;
|
|
PrintF("unbound label");
|
|
while (l.is_linked()) {
|
|
Displacement disp = disp_at(&l);
|
|
PrintF("@ %d ", l.pos());
|
|
disp.print();
|
|
PrintF("\n");
|
|
disp.next(&l);
|
|
}
|
|
} else {
|
|
PrintF("label in inconsistent state (pos = %d)\n", L->pos_);
|
|
}
|
|
}
|
|
|
|
|
|
void Assembler::bind_to(Label* L, int pos) {
|
|
EnsureSpace ensure_space(this);
|
|
ASSERT(0 <= pos && pos <= pc_offset()); // must have a valid binding position
|
|
while (L->is_linked()) {
|
|
Displacement disp = disp_at(L);
|
|
int fixup_pos = L->pos();
|
|
if (disp.type() == Displacement::CODE_RELATIVE) {
|
|
// Relative to Code* heap object pointer.
|
|
long_at_put(fixup_pos, pos + Code::kHeaderSize - kHeapObjectTag);
|
|
} else {
|
|
if (disp.type() == Displacement::UNCONDITIONAL_JUMP) {
|
|
ASSERT(byte_at(fixup_pos - 1) == 0xE9); // jmp expected
|
|
}
|
|
// Relative address, relative to point after address.
|
|
int imm32 = pos - (fixup_pos + sizeof(int32_t));
|
|
long_at_put(fixup_pos, imm32);
|
|
}
|
|
disp.next(L);
|
|
}
|
|
while (L->is_near_linked()) {
|
|
int fixup_pos = L->near_link_pos();
|
|
int offset_to_next =
|
|
static_cast<int>(*reinterpret_cast<int8_t*>(addr_at(fixup_pos)));
|
|
ASSERT(offset_to_next <= 0);
|
|
// Relative address, relative to point after address.
|
|
int disp = pos - fixup_pos - sizeof(int8_t);
|
|
CHECK(0 <= disp && disp <= 127);
|
|
set_byte_at(fixup_pos, disp);
|
|
if (offset_to_next < 0) {
|
|
L->link_to(fixup_pos + offset_to_next, Label::kNear);
|
|
} else {
|
|
L->UnuseNear();
|
|
}
|
|
}
|
|
L->bind_to(pos);
|
|
}
|
|
|
|
|
|
void Assembler::bind(Label* L) {
|
|
EnsureSpace ensure_space(this);
|
|
ASSERT(!L->is_bound()); // label can only be bound once
|
|
bind_to(L, pc_offset());
|
|
}
|
|
|
|
|
|
void Assembler::call(Label* L) {
|
|
positions_recorder()->WriteRecordedPositions();
|
|
EnsureSpace ensure_space(this);
|
|
if (L->is_bound()) {
|
|
const int long_size = 5;
|
|
int offs = L->pos() - pc_offset();
|
|
ASSERT(offs <= 0);
|
|
// 1110 1000 #32-bit disp.
|
|
EMIT(0xE8);
|
|
emit(offs - long_size);
|
|
} else {
|
|
// 1110 1000 #32-bit disp.
|
|
EMIT(0xE8);
|
|
emit_disp(L, Displacement::OTHER);
|
|
}
|
|
}
|
|
|
|
|
|
void Assembler::call(byte* entry, RelocInfo::Mode rmode) {
|
|
positions_recorder()->WriteRecordedPositions();
|
|
EnsureSpace ensure_space(this);
|
|
ASSERT(!RelocInfo::IsCodeTarget(rmode));
|
|
EMIT(0xE8);
|
|
if (RelocInfo::IsRuntimeEntry(rmode)) {
|
|
emit(reinterpret_cast<uint32_t>(entry), rmode);
|
|
} else {
|
|
emit(entry - (pc_ + sizeof(int32_t)), rmode);
|
|
}
|
|
}
|
|
|
|
|
|
int Assembler::CallSize(const Operand& adr) {
|
|
// Call size is 1 (opcode) + adr.len_ (operand).
|
|
return 1 + adr.len_;
|
|
}
|
|
|
|
|
|
void Assembler::call(const Operand& adr) {
|
|
positions_recorder()->WriteRecordedPositions();
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xFF);
|
|
emit_operand(edx, adr);
|
|
}
|
|
|
|
|
|
int Assembler::CallSize(Handle<Code> code, RelocInfo::Mode rmode) {
|
|
return 1 /* EMIT */ + sizeof(uint32_t) /* emit */;
|
|
}
|
|
|
|
|
|
void Assembler::call(Handle<Code> code,
|
|
RelocInfo::Mode rmode,
|
|
TypeFeedbackId ast_id) {
|
|
positions_recorder()->WriteRecordedPositions();
|
|
EnsureSpace ensure_space(this);
|
|
ASSERT(RelocInfo::IsCodeTarget(rmode)
|
|
|| rmode == RelocInfo::CODE_AGE_SEQUENCE);
|
|
EMIT(0xE8);
|
|
emit(code, rmode, ast_id);
|
|
}
|
|
|
|
|
|
void Assembler::jmp(Label* L, Label::Distance distance) {
|
|
EnsureSpace ensure_space(this);
|
|
if (L->is_bound()) {
|
|
const int short_size = 2;
|
|
const int long_size = 5;
|
|
int offs = L->pos() - pc_offset();
|
|
ASSERT(offs <= 0);
|
|
if (is_int8(offs - short_size)) {
|
|
// 1110 1011 #8-bit disp.
|
|
EMIT(0xEB);
|
|
EMIT((offs - short_size) & 0xFF);
|
|
} else {
|
|
// 1110 1001 #32-bit disp.
|
|
EMIT(0xE9);
|
|
emit(offs - long_size);
|
|
}
|
|
} else if (distance == Label::kNear) {
|
|
EMIT(0xEB);
|
|
emit_near_disp(L);
|
|
} else {
|
|
// 1110 1001 #32-bit disp.
|
|
EMIT(0xE9);
|
|
emit_disp(L, Displacement::UNCONDITIONAL_JUMP);
|
|
}
|
|
}
|
|
|
|
|
|
void Assembler::jmp(byte* entry, RelocInfo::Mode rmode) {
|
|
EnsureSpace ensure_space(this);
|
|
ASSERT(!RelocInfo::IsCodeTarget(rmode));
|
|
EMIT(0xE9);
|
|
if (RelocInfo::IsRuntimeEntry(rmode)) {
|
|
emit(reinterpret_cast<uint32_t>(entry), rmode);
|
|
} else {
|
|
emit(entry - (pc_ + sizeof(int32_t)), rmode);
|
|
}
|
|
}
|
|
|
|
|
|
void Assembler::jmp(const Operand& adr) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xFF);
|
|
emit_operand(esp, adr);
|
|
}
|
|
|
|
|
|
void Assembler::jmp(Handle<Code> code, RelocInfo::Mode rmode) {
|
|
EnsureSpace ensure_space(this);
|
|
ASSERT(RelocInfo::IsCodeTarget(rmode));
|
|
EMIT(0xE9);
|
|
emit(code, rmode);
|
|
}
|
|
|
|
|
|
void Assembler::j(Condition cc, Label* L, Label::Distance distance) {
|
|
EnsureSpace ensure_space(this);
|
|
ASSERT(0 <= cc && static_cast<int>(cc) < 16);
|
|
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);
|
|
emit(offs - long_size);
|
|
}
|
|
} else if (distance == Label::kNear) {
|
|
EMIT(0x70 | cc);
|
|
emit_near_disp(L);
|
|
} else {
|
|
// 0000 1111 1000 tttn #32-bit disp
|
|
// Note: could eliminate cond. jumps to this jump if condition
|
|
// is the same however, seems to be rather unlikely case.
|
|
EMIT(0x0F);
|
|
EMIT(0x80 | cc);
|
|
emit_disp(L, Displacement::OTHER);
|
|
}
|
|
}
|
|
|
|
|
|
void Assembler::j(Condition cc, byte* entry, RelocInfo::Mode rmode) {
|
|
EnsureSpace ensure_space(this);
|
|
ASSERT((0 <= cc) && (static_cast<int>(cc) < 16));
|
|
// 0000 1111 1000 tttn #32-bit disp.
|
|
EMIT(0x0F);
|
|
EMIT(0x80 | cc);
|
|
if (RelocInfo::IsRuntimeEntry(rmode)) {
|
|
emit(reinterpret_cast<uint32_t>(entry), rmode);
|
|
} else {
|
|
emit(entry - (pc_ + sizeof(int32_t)), rmode);
|
|
}
|
|
}
|
|
|
|
|
|
void Assembler::j(Condition cc, Handle<Code> code) {
|
|
EnsureSpace ensure_space(this);
|
|
// 0000 1111 1000 tttn #32-bit disp
|
|
EMIT(0x0F);
|
|
EMIT(0x80 | cc);
|
|
emit(code, RelocInfo::CODE_TARGET);
|
|
}
|
|
|
|
|
|
// FPU instructions.
|
|
|
|
void Assembler::fld(int i) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_farith(0xD9, 0xC0, i);
|
|
}
|
|
|
|
|
|
void Assembler::fstp(int i) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_farith(0xDD, 0xD8, i);
|
|
}
|
|
|
|
|
|
void Assembler::fld1() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD9);
|
|
EMIT(0xE8);
|
|
}
|
|
|
|
|
|
void Assembler::fldpi() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD9);
|
|
EMIT(0xEB);
|
|
}
|
|
|
|
|
|
void Assembler::fldz() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD9);
|
|
EMIT(0xEE);
|
|
}
|
|
|
|
|
|
void Assembler::fldln2() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD9);
|
|
EMIT(0xED);
|
|
}
|
|
|
|
|
|
void Assembler::fld_s(const Operand& adr) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD9);
|
|
emit_operand(eax, adr);
|
|
}
|
|
|
|
|
|
void Assembler::fld_d(const Operand& adr) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xDD);
|
|
emit_operand(eax, adr);
|
|
}
|
|
|
|
|
|
void Assembler::fstp_s(const Operand& adr) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD9);
|
|
emit_operand(ebx, adr);
|
|
}
|
|
|
|
|
|
void Assembler::fst_s(const Operand& adr) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD9);
|
|
emit_operand(edx, adr);
|
|
}
|
|
|
|
|
|
void Assembler::fstp_d(const Operand& adr) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xDD);
|
|
emit_operand(ebx, adr);
|
|
}
|
|
|
|
|
|
void Assembler::fst_d(const Operand& adr) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xDD);
|
|
emit_operand(edx, adr);
|
|
}
|
|
|
|
|
|
void Assembler::fild_s(const Operand& adr) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xDB);
|
|
emit_operand(eax, adr);
|
|
}
|
|
|
|
|
|
void Assembler::fild_d(const Operand& adr) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xDF);
|
|
emit_operand(ebp, adr);
|
|
}
|
|
|
|
|
|
void Assembler::fistp_s(const Operand& adr) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xDB);
|
|
emit_operand(ebx, adr);
|
|
}
|
|
|
|
|
|
void Assembler::fisttp_s(const Operand& adr) {
|
|
ASSERT(IsEnabled(SSE3));
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xDB);
|
|
emit_operand(ecx, adr);
|
|
}
|
|
|
|
|
|
void Assembler::fisttp_d(const Operand& adr) {
|
|
ASSERT(IsEnabled(SSE3));
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xDD);
|
|
emit_operand(ecx, adr);
|
|
}
|
|
|
|
|
|
void Assembler::fist_s(const Operand& adr) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xDB);
|
|
emit_operand(edx, adr);
|
|
}
|
|
|
|
|
|
void Assembler::fistp_d(const Operand& adr) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xDF);
|
|
emit_operand(edi, adr);
|
|
}
|
|
|
|
|
|
void Assembler::fabs() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD9);
|
|
EMIT(0xE1);
|
|
}
|
|
|
|
|
|
void Assembler::fchs() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD9);
|
|
EMIT(0xE0);
|
|
}
|
|
|
|
|
|
void Assembler::fcos() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD9);
|
|
EMIT(0xFF);
|
|
}
|
|
|
|
|
|
void Assembler::fsin() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD9);
|
|
EMIT(0xFE);
|
|
}
|
|
|
|
|
|
void Assembler::fptan() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD9);
|
|
EMIT(0xF2);
|
|
}
|
|
|
|
|
|
void Assembler::fyl2x() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD9);
|
|
EMIT(0xF1);
|
|
}
|
|
|
|
|
|
void Assembler::f2xm1() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD9);
|
|
EMIT(0xF0);
|
|
}
|
|
|
|
|
|
void Assembler::fscale() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD9);
|
|
EMIT(0xFD);
|
|
}
|
|
|
|
|
|
void Assembler::fninit() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xDB);
|
|
EMIT(0xE3);
|
|
}
|
|
|
|
|
|
void Assembler::fadd(int i) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_farith(0xDC, 0xC0, i);
|
|
}
|
|
|
|
|
|
void Assembler::fadd_i(int i) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_farith(0xD8, 0xC0, i);
|
|
}
|
|
|
|
|
|
void Assembler::fsub(int i) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_farith(0xDC, 0xE8, i);
|
|
}
|
|
|
|
|
|
void Assembler::fsub_i(int i) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_farith(0xD8, 0xE0, i);
|
|
}
|
|
|
|
|
|
void Assembler::fisub_s(const Operand& adr) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xDA);
|
|
emit_operand(esp, adr);
|
|
}
|
|
|
|
|
|
void Assembler::fmul_i(int i) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_farith(0xD8, 0xC8, i);
|
|
}
|
|
|
|
|
|
void Assembler::fmul(int i) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_farith(0xDC, 0xC8, i);
|
|
}
|
|
|
|
|
|
void Assembler::fdiv(int i) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_farith(0xDC, 0xF8, i);
|
|
}
|
|
|
|
|
|
void Assembler::fdiv_i(int i) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_farith(0xD8, 0xF0, i);
|
|
}
|
|
|
|
|
|
void Assembler::faddp(int i) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_farith(0xDE, 0xC0, i);
|
|
}
|
|
|
|
|
|
void Assembler::fsubp(int i) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_farith(0xDE, 0xE8, i);
|
|
}
|
|
|
|
|
|
void Assembler::fsubrp(int i) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_farith(0xDE, 0xE0, i);
|
|
}
|
|
|
|
|
|
void Assembler::fmulp(int i) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_farith(0xDE, 0xC8, i);
|
|
}
|
|
|
|
|
|
void Assembler::fdivp(int i) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_farith(0xDE, 0xF8, i);
|
|
}
|
|
|
|
|
|
void Assembler::fprem() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD9);
|
|
EMIT(0xF8);
|
|
}
|
|
|
|
|
|
void Assembler::fprem1() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD9);
|
|
EMIT(0xF5);
|
|
}
|
|
|
|
|
|
void Assembler::fxch(int i) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_farith(0xD9, 0xC8, i);
|
|
}
|
|
|
|
|
|
void Assembler::fincstp() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD9);
|
|
EMIT(0xF7);
|
|
}
|
|
|
|
|
|
void Assembler::ffree(int i) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_farith(0xDD, 0xC0, i);
|
|
}
|
|
|
|
|
|
void Assembler::ftst() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD9);
|
|
EMIT(0xE4);
|
|
}
|
|
|
|
|
|
void Assembler::fucomp(int i) {
|
|
EnsureSpace ensure_space(this);
|
|
emit_farith(0xDD, 0xE8, i);
|
|
}
|
|
|
|
|
|
void Assembler::fucompp() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xDA);
|
|
EMIT(0xE9);
|
|
}
|
|
|
|
|
|
void Assembler::fucomi(int i) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xDB);
|
|
EMIT(0xE8 + i);
|
|
}
|
|
|
|
|
|
void Assembler::fucomip() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xDF);
|
|
EMIT(0xE9);
|
|
}
|
|
|
|
|
|
void Assembler::fcompp() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xDE);
|
|
EMIT(0xD9);
|
|
}
|
|
|
|
|
|
void Assembler::fnstsw_ax() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xDF);
|
|
EMIT(0xE0);
|
|
}
|
|
|
|
|
|
void Assembler::fwait() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x9B);
|
|
}
|
|
|
|
|
|
void Assembler::frndint() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xD9);
|
|
EMIT(0xFC);
|
|
}
|
|
|
|
|
|
void Assembler::fnclex() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0xDB);
|
|
EMIT(0xE2);
|
|
}
|
|
|
|
|
|
void Assembler::sahf() {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x9E);
|
|
}
|
|
|
|
|
|
void Assembler::setcc(Condition cc, Register reg) {
|
|
ASSERT(reg.is_byte_register());
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(0x0F);
|
|
EMIT(0x90 | cc);
|
|
EMIT(0xC0 | reg.code());
|
|
}
|
|
|
|
|
|
void Assembler::Print() {
|
|
Disassembler::Decode(isolate(), stdout, buffer_, pc_);
|
|
}
|
|
|
|
|
|
void Assembler::RecordJSReturn() {
|
|
positions_recorder()->WriteRecordedPositions();
|
|
EnsureSpace ensure_space(this);
|
|
RecordRelocInfo(RelocInfo::JS_RETURN);
|
|
}
|
|
|
|
|
|
void Assembler::RecordDebugBreakSlot() {
|
|
positions_recorder()->WriteRecordedPositions();
|
|
EnsureSpace ensure_space(this);
|
|
RecordRelocInfo(RelocInfo::DEBUG_BREAK_SLOT);
|
|
}
|
|
|
|
|
|
void Assembler::RecordComment(const char* msg, bool force) {
|
|
if (FLAG_code_comments || force) {
|
|
EnsureSpace ensure_space(this);
|
|
RecordRelocInfo(RelocInfo::COMMENT, reinterpret_cast<intptr_t>(msg));
|
|
}
|
|
}
|
|
|
|
|
|
void Assembler::GrowBuffer() {
|
|
ASSERT(buffer_overflow());
|
|
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 > isolate()->heap()->MaxOldGenerationSize())) {
|
|
V8::FatalProcessOutOfMemory("Assembler::GrowBuffer");
|
|
}
|
|
|
|
// Set up 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.
|
|
int pc_delta = desc.buffer - buffer_;
|
|
int rc_delta = (desc.buffer + desc.buffer_size) - (buffer_ + buffer_size_);
|
|
OS::MemMove(desc.buffer, buffer_, desc.instr_size);
|
|
OS::MemMove(rc_delta + reloc_info_writer.pos(),
|
|
reloc_info_writer.pos(), desc.reloc_size);
|
|
|
|
// Switch buffers.
|
|
if (isolate()->assembler_spare_buffer() == NULL &&
|
|
buffer_size_ == kMinimalBufferSize) {
|
|
isolate()->set_assembler_spare_buffer(buffer_);
|
|
} else {
|
|
DeleteArray(buffer_);
|
|
}
|
|
buffer_ = desc.buffer;
|
|
buffer_size_ = desc.buffer_size;
|
|
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) {
|
|
int32_t* p = reinterpret_cast<int32_t*>(it.rinfo()->pc());
|
|
if (*p != 0) { // 0 means uninitialized.
|
|
*p += pc_delta;
|
|
}
|
|
}
|
|
}
|
|
|
|
ASSERT(!buffer_overflow());
|
|
}
|
|
|
|
|
|
void Assembler::emit_arith_b(int op1, int op2, Register dst, int imm8) {
|
|
ASSERT(is_uint8(op1) && is_uint8(op2)); // wrong opcode
|
|
ASSERT(is_uint8(imm8));
|
|
ASSERT((op1 & 0x01) == 0); // should be 8bit operation
|
|
EMIT(op1);
|
|
EMIT(op2 | dst.code());
|
|
EMIT(imm8);
|
|
}
|
|
|
|
|
|
void Assembler::emit_arith(int sel, Operand dst, const Immediate& x) {
|
|
ASSERT((0 <= sel) && (sel <= 7));
|
|
Register ireg = { sel };
|
|
if (x.is_int8()) {
|
|
EMIT(0x83); // using a sign-extended 8-bit immediate.
|
|
emit_operand(ireg, dst);
|
|
EMIT(x.x_ & 0xFF);
|
|
} else if (dst.is_reg(eax)) {
|
|
EMIT((sel << 3) | 0x05); // short form if the destination is eax.
|
|
emit(x);
|
|
} else {
|
|
EMIT(0x81); // using a literal 32-bit immediate.
|
|
emit_operand(ireg, dst);
|
|
emit(x);
|
|
}
|
|
}
|
|
|
|
|
|
void Assembler::emit_operand(Register reg, const Operand& adr) {
|
|
const unsigned length = adr.len_;
|
|
ASSERT(length > 0);
|
|
|
|
// Emit updated ModRM byte containing the given register.
|
|
pc_[0] = (adr.buf_[0] & ~0x38) | (reg.code() << 3);
|
|
|
|
// Emit the rest of the encoded operand.
|
|
for (unsigned i = 1; i < length; i++) pc_[i] = adr.buf_[i];
|
|
pc_ += length;
|
|
|
|
// Emit relocation information if necessary.
|
|
if (length >= sizeof(int32_t) && !RelocInfo::IsNone(adr.rmode_)) {
|
|
pc_ -= sizeof(int32_t); // pc_ must be *at* disp32
|
|
RecordRelocInfo(adr.rmode_);
|
|
pc_ += sizeof(int32_t);
|
|
}
|
|
}
|
|
|
|
|
|
void Assembler::emit_farith(int b1, int b2, int i) {
|
|
ASSERT(is_uint8(b1) && is_uint8(b2)); // wrong opcode
|
|
ASSERT(0 <= i && i < 8); // illegal stack offset
|
|
EMIT(b1);
|
|
EMIT(b2 + i);
|
|
}
|
|
|
|
|
|
void Assembler::db(uint8_t data) {
|
|
EnsureSpace ensure_space(this);
|
|
EMIT(data);
|
|
}
|
|
|
|
|
|
void Assembler::dd(uint32_t data) {
|
|
EnsureSpace ensure_space(this);
|
|
emit(data);
|
|
}
|
|
|
|
|
|
void Assembler::RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data) {
|
|
ASSERT(!RelocInfo::IsNone(rmode));
|
|
// Don't record external references unless the heap will be serialized.
|
|
if (rmode == RelocInfo::EXTERNAL_REFERENCE &&
|
|
!serializer_enabled() && !emit_debug_code()) {
|
|
return;
|
|
}
|
|
RelocInfo rinfo(pc_, rmode, data, NULL);
|
|
reloc_info_writer.Write(&rinfo);
|
|
}
|
|
|
|
|
|
Handle<ConstantPoolArray> Assembler::NewConstantPool(Isolate* isolate) {
|
|
// No out-of-line constant pool support.
|
|
ASSERT(!FLAG_enable_ool_constant_pool);
|
|
return isolate->factory()->empty_constant_pool_array();
|
|
}
|
|
|
|
|
|
void Assembler::PopulateConstantPool(ConstantPoolArray* constant_pool) {
|
|
// No out-of-line constant pool support.
|
|
ASSERT(!FLAG_enable_ool_constant_pool);
|
|
return;
|
|
}
|
|
|
|
|
|
#ifdef GENERATED_CODE_COVERAGE
|
|
static FILE* coverage_log = NULL;
|
|
|
|
|
|
static void InitCoverageLog() {
|
|
char* file_name = getenv("V8_GENERATED_CODE_COVERAGE_LOG");
|
|
if (file_name != NULL) {
|
|
coverage_log = fopen(file_name, "aw+");
|
|
}
|
|
}
|
|
|
|
|
|
void LogGeneratedCodeCoverage(const char* file_line) {
|
|
const char* return_address = (&file_line)[-1];
|
|
char* push_insn = const_cast<char*>(return_address - 12);
|
|
push_insn[0] = 0xeb; // Relative branch insn.
|
|
push_insn[1] = 13; // Skip over coverage insns.
|
|
if (coverage_log != NULL) {
|
|
fprintf(coverage_log, "%s\n", file_line);
|
|
fflush(coverage_log);
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
} } // namespace v8::internal
|
|
|
|
#endif // V8_TARGET_ARCH_X87
|