Add initial integrated assembler w/ some Xmm ops.

src/assembler_ia32.cpp

+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+//
+// Modified by the Subzero authors.
+//
+//===- subzero/src/assembler_ia32.cpp - Assembler for x86-32  -------------===//
+//
+//                        The Subzero Code Generator
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the Assembler class for x86-32.
+//
+//===----------------------------------------------------------------------===//
+
+#include "assembler_ia32.h"
+#include "IceCfg.h"
+#include "IceMemoryRegion.h"
+#include "IceOperand.h"
+
+namespace Ice {
+namespace x86 {
+
+class DirectCallRelocation : public AssemblerFixup {
+public:
+  static DirectCallRelocation *create(Assembler *Asm, FixupKind Kind,
+                                      const ConstantRelocatable *Sym) {
+    return new (Asm->Allocate<DirectCallRelocation>())
+        DirectCallRelocation(Kind, Sym);
+  }
+
+  void Process(const MemoryRegion &region, intptr_t position) {
+    // Direct calls are relative to the following instruction on x86.
+    int32_t pointer = region.Load<int32_t>(position);
+    int32_t delta = region.start() + position + sizeof(int32_t);
+    region.Store<int32_t>(position, pointer - delta);
+  }
+
+private:
+  DirectCallRelocation(FixupKind Kind, const ConstantRelocatable *Sym)
+      : AssemblerFixup(Kind, Sym) {}
+};
+
+Address Address::ofConstPool(GlobalContext *Ctx, Assembler *Asm,
+                             const Constant *Imm) {
+  // We should make this much lighter-weight. E.g., just record the const pool
+  // entry ID.
+  std::string Buffer;
+  llvm::raw_string_ostream StrBuf(Buffer);
+  Type Ty = Imm->getType();
+  assert(llvm::isa<ConstantFloat>(Imm) || llvm::isa<ConstantDouble>(Imm));
+  StrBuf << "L$" << Ty << "$" << Imm->getPoolEntryID();
+  const int64_t Offset = 0;
+  const bool SuppressMangling = true;
+  Constant *Sym =
+      Ctx->getConstantSym(Ty, Offset, StrBuf.str(), SuppressMangling);
+  AssemblerFixup *Fixup = x86::DisplacementRelocation::create(
+      Asm, FK_Abs_4, llvm::cast<ConstantRelocatable>(Sym));
+  return x86::Address::Absolute(Offset, Fixup);
+}
+
+void AssemblerX86::call(GPRRegister reg) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xFF);
+  EmitRegisterOperand(2, reg);
+}
+
+void AssemblerX86::call(const Address &address) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xFF);
+  EmitOperand(2, address);
+}
+
+void AssemblerX86::call(Label *label) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xE8);
+  static const int kSize = 5;
+  EmitLabel(label, kSize);
+}
+
+void AssemblerX86::call(const ConstantRelocatable *label) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  intptr_t call_start = buffer_.GetPosition();
+  EmitUint8(0xE8);
+  EmitFixup(DirectCallRelocation::create(this, FK_PcRel_4, label));
+  EmitInt32(-4);
+  assert((buffer_.GetPosition() - call_start) == kCallExternalLabelSize);
+}
+
+void AssemblerX86::pushl(GPRRegister reg) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x50 + reg);
+}
+
+void AssemblerX86::pushl(const Address &address) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xFF);
+  EmitOperand(6, address);
+}
+
+void AssemblerX86::pushl(const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x68);
+  EmitImmediate(imm);
+}
+
+void AssemblerX86::popl(GPRRegister reg) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x58 + reg);
+}
+
+void AssemblerX86::popl(const Address &address) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x8F);
+  EmitOperand(0, address);
+}
+
+void AssemblerX86::pushal() {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x60);
+}
+
+void AssemblerX86::popal() {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x61);
+}
+
+void AssemblerX86::setcc(CondX86::BrCond condition, ByteRegister dst) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x90 + condition);
+  EmitUint8(0xC0 + dst);
+}
+
+void AssemblerX86::movl(GPRRegister dst, const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xB8 + dst);
+  EmitImmediate(imm);
+}
+
+void AssemblerX86::movl(GPRRegister dst, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x89);
+  EmitRegisterOperand(src, dst);
+}
+
+void AssemblerX86::movl(GPRRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x8B);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::movl(const Address &dst, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x89);
+  EmitOperand(src, dst);
+}
+
+void AssemblerX86::movl(const Address &dst, const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xC7);
+  EmitOperand(0, dst);
+  EmitImmediate(imm);
+}
+
+void AssemblerX86::movzxb(GPRRegister dst, ByteRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xB6);
+  EmitRegisterOperand(dst, src);
+}
+
+void AssemblerX86::movzxb(GPRRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xB6);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::movsxb(GPRRegister dst, ByteRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xBE);
+  EmitRegisterOperand(dst, src);
+}
+
+void AssemblerX86::movsxb(GPRRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xBE);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::movb(ByteRegister dst, const Address &src) {
+  (void)dst;
+  (void)src;
+  // FATAL
+  llvm_unreachable("Use movzxb or movsxb instead.");
+}
+
+void AssemblerX86::movb(const Address &dst, ByteRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x88);
+  EmitOperand(src, dst);
+}
+
+void AssemblerX86::movb(const Address &dst, const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xC6);
+  EmitOperand(RegX8632::Encoded_Reg_eax, dst);
+  assert(imm.is_int8());
+  EmitUint8(imm.value() & 0xFF);
+}
+
+void AssemblerX86::movzxw(GPRRegister dst, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xB7);
+  EmitRegisterOperand(dst, src);
+}
+
+void AssemblerX86::movzxw(GPRRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xB7);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::movsxw(GPRRegister dst, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xBF);
+  EmitRegisterOperand(dst, src);
+}
+
+void AssemblerX86::movsxw(GPRRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xBF);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::movw(GPRRegister dst, const Address &src) {
+  (void)dst;
+  (void)src;
+  // FATAL
+  llvm_unreachable("Use movzxw or movsxw instead.");
+}
+
+void AssemblerX86::movw(const Address &dst, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitOperandSizeOverride();
+  EmitUint8(0x89);
+  EmitOperand(src, dst);
+}
+
+void AssemblerX86::leal(GPRRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x8D);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::cmov(CondX86::BrCond cond, GPRRegister dst,
+                        GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x40 + cond);
+  EmitRegisterOperand(dst, src);
+}
+
+void AssemblerX86::rep_movsb() {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF3);
+  EmitUint8(0xA4);
+}
+
+void AssemblerX86::movss(XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF3);
+  EmitUint8(0x0F);
+  EmitUint8(0x10);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::movss(const Address &dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF3);
+  EmitUint8(0x0F);
+  EmitUint8(0x11);
+  EmitOperand(src, dst);
+}
+
+void AssemblerX86::movss(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF3);
+  EmitUint8(0x0F);
+  EmitUint8(0x11);
+  EmitXmmRegisterOperand(src, dst);
+}
+
+void AssemblerX86::movd(XmmRegister dst, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x6E);
+  EmitOperand(dst, Operand(src));
+}
+
+void AssemblerX86::movd(GPRRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x7E);
+  EmitOperand(src, Operand(dst));
+}
+
+void AssemblerX86::movq(const Address &dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0xD6);
+  EmitOperand(src, Operand(dst));
+}
+
+void AssemblerX86::movq(XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF3);
+  EmitUint8(0x0F);
+  EmitUint8(0x7E);
+  EmitOperand(dst, Operand(src));
+}
+
+void AssemblerX86::addss(Type Ty, XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(Ty == IceType_f32 ? 0xF3 : 0xF2);

[jvoung (off chromium), 2014/09/20 18:13:34]

I debated a bunch where to put the Type check. This seemed not-so-awful, since
the compiler is able to turn this into a:

sete ...
or ...
To flip the bit from F2 to F3.

+  EmitUint8(0x0F);
+  EmitUint8(0x58);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::addss(Type Ty, XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(Ty == IceType_f32 ? 0xF3 : 0xF2);
+  EmitUint8(0x0F);
+  EmitUint8(0x58);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::subss(Type Ty, XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(Ty == IceType_f32 ? 0xF3 : 0xF2);
+  EmitUint8(0x0F);
+  EmitUint8(0x5C);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::subss(Type Ty, XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(Ty == IceType_f32 ? 0xF3 : 0xF2);
+  EmitUint8(0x0F);
+  EmitUint8(0x5C);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::mulss(Type Ty, XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(Ty == IceType_f32 ? 0xF3 : 0xF2);
+  EmitUint8(0x0F);
+  EmitUint8(0x59);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::mulss(Type Ty, XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(Ty == IceType_f32 ? 0xF3 : 0xF2);
+  EmitUint8(0x0F);
+  EmitUint8(0x59);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::divss(Type Ty, XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(Ty == IceType_f32 ? 0xF3 : 0xF2);
+  EmitUint8(0x0F);
+  EmitUint8(0x5E);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::divss(Type Ty, XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(Ty == IceType_f32 ? 0xF3 : 0xF2);
+  EmitUint8(0x0F);
+  EmitUint8(0x5E);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::flds(const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xD9);
+  EmitOperand(0, src);
+}
+
+void AssemblerX86::fstps(const Address &dst) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xD9);
+  EmitOperand(3, dst);
+}
+
+void AssemblerX86::movsd(XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF2);
+  EmitUint8(0x0F);
+  EmitUint8(0x10);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::movsd(const Address &dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF2);
+  EmitUint8(0x0F);
+  EmitUint8(0x11);
+  EmitOperand(src, dst);
+}
+
+void AssemblerX86::movsd(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF2);
+  EmitUint8(0x0F);
+  EmitUint8(0x11);
+  EmitXmmRegisterOperand(src, dst);
+}
+
+void AssemblerX86::movaps(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x28);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::movups(XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x10);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::movups(const Address &dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x11);
+  EmitOperand(src, dst);
+}
+
+void AssemblerX86::padd(Type Ty, XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  if (Ty == IceType_i8 || Ty == IceType_i1) {
+    EmitUint8(0xFC);
+  } else if (Ty == IceType_i16) {
+    EmitUint8(0xFD);
+  } else {
+    EmitUint8(0xFE);
+  }
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::padd(Type Ty, XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  if (Ty == IceType_i8 || Ty == IceType_i1) {
+    EmitUint8(0xFC);
+  } else if (Ty == IceType_i16) {
+    EmitUint8(0xFD);
+  } else {
+    EmitUint8(0xFE);
+  }
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::pand(Type /* Ty */, XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0xDB);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::pand(Type /* Ty */, XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0xDB);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::pandn(Type /* Ty */, XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0xDF);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::pandn(Type /* Ty */, XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0xDF);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::pmuludq(Type /* Ty */, XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0xF4);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::pmuludq(Type /* Ty */, XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0xF4);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::por(Type /* Ty */, XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0xEB);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::por(Type /* Ty */, XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0xEB);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::psub(Type Ty, XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  if (Ty == IceType_i8 || Ty == IceType_i1) {
+    EmitUint8(0xF8);
+  } else if (Ty == IceType_i16) {
+    EmitUint8(0xF9);
+  } else {
+    EmitUint8(0xFA);
+  }
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::psub(Type Ty, XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  if (Ty == IceType_i8 || Ty == IceType_i1) {
+    EmitUint8(0xF8);
+  } else if (Ty == IceType_i16) {
+    EmitUint8(0xF9);
+  } else {
+    EmitUint8(0xFA);
+  }
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::pxor(Type /* Ty */, XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0xEF);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::pxor(Type /* Ty */, XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0xEF);
+  EmitOperand(dst, src);
+}
+
+// {add,sub,mul,div}ps are given a Ty parameter for consistency with
+// {add,sub,mul,div}ss. In the future, when the PNaCl ABI allows
+// addpd, etc., we can use the Ty parameter to decide on adding
+// a 0x66 prefix.
+void AssemblerX86::addps(Type /* Ty */, XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x58);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::addps(Type /* Ty */, XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x58);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::subps(Type /* Ty */, XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x5C);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::subps(Type /* Ty */, XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x5C);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::divps(Type /* Ty */, XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x5E);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::divps(Type /* Ty */, XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x5E);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::mulps(Type /* Ty */, XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x59);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::mulps(Type /* Ty */, XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x59);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::minps(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x5D);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::maxps(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x5F);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::andps(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x54);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::andps(XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x54);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::orps(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x56);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::cmpps(XmmRegister dst, XmmRegister src,
+                         uint8_t CmpCondition) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xC2);
+  EmitXmmRegisterOperand(dst, src);
+  EmitUint8(CmpCondition);
+}
+
+void AssemblerX86::cmpps(XmmRegister dst, const Address &src,
+                         uint8_t CmpCondition) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xC2);
+  EmitOperand(dst, src);
+  EmitUint8(CmpCondition);
+}
+
+void AssemblerX86::sqrtps(XmmRegister dst) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x51);
+  EmitXmmRegisterOperand(dst, dst);
+}
+
+void AssemblerX86::rsqrtps(XmmRegister dst) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x52);
+  EmitXmmRegisterOperand(dst, dst);
+}
+
+void AssemblerX86::reciprocalps(XmmRegister dst) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x53);
+  EmitXmmRegisterOperand(dst, dst);
+}
+
+void AssemblerX86::movhlps(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x12);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::movlhps(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x16);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::unpcklps(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x14);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::unpckhps(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x15);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::unpcklpd(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x14);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::unpckhpd(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x15);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::set1ps(XmmRegister dst, GPRRegister tmp1,
+                          const Immediate &imm) {
+  // Load 32-bit immediate value into tmp1.
+  movl(tmp1, imm);
+  // Move value from tmp1 into dst.
+  movd(dst, tmp1);
+  // Broadcast low lane into other three lanes.
+  shufps(dst, dst, Immediate(0x0));
+}
+
+void AssemblerX86::shufps(XmmRegister dst, XmmRegister src,
+                          const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xC6);
+  EmitXmmRegisterOperand(dst, src);
+  assert(imm.is_uint8());
+  EmitUint8(imm.value());
+}
+
+void AssemblerX86::minpd(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x5D);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::maxpd(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x5F);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::sqrtpd(XmmRegister dst) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x51);
+  EmitXmmRegisterOperand(dst, dst);
+}
+
+void AssemblerX86::cvtps2pd(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x5A);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::cvtpd2ps(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x5A);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::shufpd(XmmRegister dst, XmmRegister src,
+                          const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0xC6);
+  EmitXmmRegisterOperand(dst, src);
+  assert(imm.is_uint8());
+  EmitUint8(imm.value());
+}
+
+void AssemblerX86::cvtsi2ss(XmmRegister dst, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF3);
+  EmitUint8(0x0F);
+  EmitUint8(0x2A);
+  EmitOperand(dst, Operand(src));
+}
+
+void AssemblerX86::cvtsi2sd(XmmRegister dst, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF2);
+  EmitUint8(0x0F);
+  EmitUint8(0x2A);
+  EmitOperand(dst, Operand(src));
+}
+
+void AssemblerX86::cvtss2si(GPRRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF3);
+  EmitUint8(0x0F);
+  EmitUint8(0x2D);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::cvtss2sd(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF3);
+  EmitUint8(0x0F);
+  EmitUint8(0x5A);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::cvtsd2si(GPRRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF2);
+  EmitUint8(0x0F);
+  EmitUint8(0x2D);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::cvttss2si(GPRRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF3);
+  EmitUint8(0x0F);
+  EmitUint8(0x2C);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::cvttsd2si(GPRRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF2);
+  EmitUint8(0x0F);
+  EmitUint8(0x2C);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::cvtsd2ss(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF2);
+  EmitUint8(0x0F);
+  EmitUint8(0x5A);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::cvtdq2pd(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF3);
+  EmitUint8(0x0F);
+  EmitUint8(0xE6);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::ucomiss(Type Ty, XmmRegister a, XmmRegister b) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  if (Ty == IceType_f64)
+    EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x2E);
+  EmitXmmRegisterOperand(a, b);
+}
+
+void AssemblerX86::ucomiss(Type Ty, XmmRegister a, const Address &b) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  if (Ty == IceType_f64)
+    EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x2E);
+  EmitOperand(a, b);
+}
+
+void AssemblerX86::movmskpd(GPRRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x50);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::movmskps(GPRRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x50);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::sqrtss(Type Ty, XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(Ty == IceType_f32 ? 0xF3 : 0xF2);
+  EmitUint8(0x0F);
+  EmitUint8(0x51);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::sqrtss(Type Ty, XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(Ty == IceType_f32 ? 0xF3 : 0xF2);
+  EmitUint8(0x0F);
+  EmitUint8(0x51);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::xorpd(XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x57);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::xorpd(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x57);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::orpd(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x56);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::xorps(XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x57);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::xorps(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x57);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::andpd(XmmRegister dst, const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x54);
+  EmitOperand(dst, src);
+}
+
+void AssemblerX86::andpd(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x54);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::pextrd(GPRRegister dst, XmmRegister src,
+                          const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x3A);
+  EmitUint8(0x16);
+  EmitOperand(src, Operand(dst));
+  assert(imm.is_uint8());
+  EmitUint8(imm.value());
+}
+
+void AssemblerX86::pmovsxdq(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x38);
+  EmitUint8(0x25);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::pcmpeqq(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x38);
+  EmitUint8(0x29);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::pxor(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0xEF);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+void AssemblerX86::roundsd(XmmRegister dst, XmmRegister src,
+                           RoundingMode mode) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x3A);
+  EmitUint8(0x0B);
+  EmitXmmRegisterOperand(dst, src);
+  // Mask precision exeption.
+  EmitUint8(static_cast<uint8_t>(mode) | 0x8);
+}
+
+void AssemblerX86::fldl(const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xDD);
+  EmitOperand(0, src);
+}
+
+void AssemblerX86::fstpl(const Address &dst) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xDD);
+  EmitOperand(3, dst);
+}
+
+void AssemblerX86::fnstcw(const Address &dst) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xD9);
+  EmitOperand(7, dst);
+}
+
+void AssemblerX86::fldcw(const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xD9);
+  EmitOperand(5, src);
+}
+
+void AssemblerX86::fistpl(const Address &dst) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xDF);
+  EmitOperand(7, dst);
+}
+
+void AssemblerX86::fistps(const Address &dst) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xDB);
+  EmitOperand(3, dst);
+}
+
+void AssemblerX86::fildl(const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xDF);
+  EmitOperand(5, src);
+}
+
+void AssemblerX86::filds(const Address &src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xDB);
+  EmitOperand(0, src);
+}
+
+void AssemblerX86::fincstp() {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xD9);
+  EmitUint8(0xF7);
+}
+
+void AssemblerX86::xchgl(GPRRegister dst, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x87);
+  EmitRegisterOperand(dst, src);
+}
+
+void AssemblerX86::cmpl(GPRRegister reg, const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitComplex(7, Operand(reg), imm);
+}
+
+void AssemblerX86::cmpl(GPRRegister reg0, GPRRegister reg1) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x3B);
+  EmitOperand(reg0, Operand(reg1));
+}
+
+void AssemblerX86::cmpl(GPRRegister reg, const Address &address) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x3B);
+  EmitOperand(reg, address);
+}
+
+void AssemblerX86::addl(GPRRegister dst, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x03);
+  EmitRegisterOperand(dst, src);
+}
+
+void AssemblerX86::addl(GPRRegister reg, const Address &address) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x03);
+  EmitOperand(reg, address);
+}
+
+void AssemblerX86::cmpl(const Address &address, GPRRegister reg) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x39);
+  EmitOperand(reg, address);
+}
+
+void AssemblerX86::cmpl(const Address &address, const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitComplex(7, address, imm);
+}
+
+void AssemblerX86::cmpb(const Address &address, const Immediate &imm) {
+  assert(imm.is_int8());
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x80);
+  EmitOperand(7, address);
+  EmitUint8(imm.value() & 0xFF);
+}
+
+void AssemblerX86::testl(GPRRegister reg1, GPRRegister reg2) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x85);
+  EmitRegisterOperand(reg1, reg2);
+}
+
+void AssemblerX86::testl(GPRRegister reg, const Immediate &immediate) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  // For registers that have a byte variant (EAX, EBX, ECX, and EDX)
+  // we only test the byte register to keep the encoding short.
+  if (immediate.is_uint8() && reg < 4) {
+    // Use zero-extended 8-bit immediate.
+    if (reg == RegX8632::Encoded_Reg_eax) {
+      EmitUint8(0xA8);
+    } else {
+      EmitUint8(0xF6);
+      EmitUint8(0xC0 + reg);
+    }
+    EmitUint8(immediate.value() & 0xFF);
+  } else if (reg == RegX8632::Encoded_Reg_eax) {
+    // Use short form if the destination is EAX.
+    EmitUint8(0xA9);
+    EmitImmediate(immediate);
+  } else {
+    EmitUint8(0xF7);
+    EmitOperand(0, Operand(reg));
+    EmitImmediate(immediate);
+  }
+}
+
+void AssemblerX86::andl(GPRRegister dst, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x23);
+  EmitOperand(dst, Operand(src));
+}
+
+void AssemblerX86::andl(GPRRegister dst, const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitComplex(4, Operand(dst), imm);
+}
+
+void AssemblerX86::andl(GPRRegister dst, const Address &address) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x23);
+  EmitOperand(dst, address);
+}
+
+void AssemblerX86::orl(GPRRegister dst, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0B);
+  EmitOperand(dst, Operand(src));
+}
+
+void AssemblerX86::orl(GPRRegister dst, const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitComplex(1, Operand(dst), imm);
+}
+
+void AssemblerX86::orl(GPRRegister dst, const Address &address) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0B);
+  EmitOperand(dst, address);
+}
+
+void AssemblerX86::xorl(GPRRegister dst, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x33);
+  EmitOperand(dst, Operand(src));
+}
+
+void AssemblerX86::xorl(GPRRegister dst, const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitComplex(6, Operand(dst), imm);
+}
+
+void AssemblerX86::xorl(GPRRegister dst, const Address &address) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x33);
+  EmitOperand(dst, address);
+}
+
+void AssemblerX86::addl(GPRRegister reg, const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitComplex(0, Operand(reg), imm);
+}
+
+void AssemblerX86::addl(const Address &address, GPRRegister reg) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x01);
+  EmitOperand(reg, address);
+}
+
+void AssemblerX86::addl(const Address &address, const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitComplex(0, address, imm);
+}
+
+void AssemblerX86::adcl(GPRRegister reg, const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitComplex(2, Operand(reg), imm);
+}
+
+void AssemblerX86::adcl(GPRRegister dst, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x13);
+  EmitOperand(dst, Operand(src));
+}
+
+void AssemblerX86::adcl(GPRRegister dst, const Address &address) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x13);
+  EmitOperand(dst, address);
+}
+
+void AssemblerX86::adcl(const Address &address, GPRRegister reg) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x11);
+  EmitOperand(reg, address);
+}
+
+void AssemblerX86::subl(GPRRegister dst, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x2B);
+  EmitOperand(dst, Operand(src));
+}
+
+void AssemblerX86::subl(GPRRegister reg, const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitComplex(5, Operand(reg), imm);
+}
+
+void AssemblerX86::subl(GPRRegister reg, const Address &address) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x2B);
+  EmitOperand(reg, address);
+}
+
+void AssemblerX86::subl(const Address &address, GPRRegister reg) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x29);
+  EmitOperand(reg, address);
+}
+
+void AssemblerX86::cdq() {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x99);
+}
+
+void AssemblerX86::idivl(GPRRegister reg) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF7);
+  EmitUint8(0xF8 | reg);
+}
+
+void AssemblerX86::imull(GPRRegister dst, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xAF);
+  EmitOperand(dst, Operand(src));
+}
+
+void AssemblerX86::imull(GPRRegister reg, const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x69);
+  EmitOperand(reg, Operand(reg));
+  EmitImmediate(imm);
+}
+
+void AssemblerX86::imull(GPRRegister reg, const Address &address) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xAF);
+  EmitOperand(reg, address);
+}
+
+void AssemblerX86::imull(GPRRegister reg) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF7);
+  EmitOperand(5, Operand(reg));
+}
+
+void AssemblerX86::imull(const Address &address) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF7);
+  EmitOperand(5, address);
+}
+
+void AssemblerX86::mull(GPRRegister reg) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF7);
+  EmitOperand(4, Operand(reg));
+}
+
+void AssemblerX86::mull(const Address &address) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF7);
+  EmitOperand(4, address);
+}
+
+void AssemblerX86::sbbl(GPRRegister dst, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x1B);
+  EmitOperand(dst, Operand(src));
+}
+
+void AssemblerX86::sbbl(GPRRegister reg, const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitComplex(3, Operand(reg), imm);
+}
+
+void AssemblerX86::sbbl(GPRRegister dst, const Address &address) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x1B);
+  EmitOperand(dst, address);
+}
+
+void AssemblerX86::sbbl(const Address &address, GPRRegister dst) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x19);
+  EmitOperand(dst, address);
+}
+
+void AssemblerX86::incl(GPRRegister reg) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x40 + reg);
+}
+
+void AssemblerX86::incl(const Address &address) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xFF);
+  EmitOperand(0, address);
+}
+
+void AssemblerX86::decl(GPRRegister reg) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x48 + reg);
+}
+
+void AssemblerX86::decl(const Address &address) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xFF);
+  EmitOperand(1, address);
+}
+
+void AssemblerX86::shll(GPRRegister reg, const Immediate &imm) {
+  EmitGenericShift(4, reg, imm);
+}
+
+void AssemblerX86::shll(GPRRegister operand, GPRRegister shifter) {
+  EmitGenericShift(4, Operand(operand), shifter);
+}
+
+void AssemblerX86::shll(const Address &operand, GPRRegister shifter) {
+  EmitGenericShift(4, Operand(operand), shifter);
+}
+
+void AssemblerX86::shrl(GPRRegister reg, const Immediate &imm) {
+  EmitGenericShift(5, reg, imm);
+}
+
+void AssemblerX86::shrl(GPRRegister operand, GPRRegister shifter) {
+  EmitGenericShift(5, Operand(operand), shifter);
+}
+
+void AssemblerX86::sarl(GPRRegister reg, const Immediate &imm) {
+  EmitGenericShift(7, reg, imm);
+}
+
+void AssemblerX86::sarl(GPRRegister operand, GPRRegister shifter) {
+  EmitGenericShift(7, Operand(operand), shifter);
+}
+
+void AssemblerX86::sarl(const Address &address, GPRRegister shifter) {
+  EmitGenericShift(7, Operand(address), shifter);
+}
+
+void AssemblerX86::shld(GPRRegister dst, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xA5);
+  EmitRegisterOperand(src, dst);
+}
+
+void AssemblerX86::shld(GPRRegister dst, GPRRegister src,
+                        const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  assert(imm.is_int8());
+  EmitUint8(0x0F);
+  EmitUint8(0xA4);
+  EmitRegisterOperand(src, dst);
+  EmitUint8(imm.value() & 0xFF);
+}
+
+void AssemblerX86::shld(const Address &operand, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xA5);
+  EmitOperand(src, Operand(operand));
+}
+
+void AssemblerX86::shrd(GPRRegister dst, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xAD);
+  EmitRegisterOperand(src, dst);
+}
+
+void AssemblerX86::shrd(GPRRegister dst, GPRRegister src,
+                        const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  assert(imm.is_int8());
+  EmitUint8(0x0F);
+  EmitUint8(0xAC);
+  EmitRegisterOperand(src, dst);
+  EmitUint8(imm.value() & 0xFF);
+}
+
+void AssemblerX86::shrd(const Address &dst, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xAD);
+  EmitOperand(src, Operand(dst));
+}
+
+void AssemblerX86::negl(GPRRegister reg) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF7);
+  EmitOperand(3, Operand(reg));
+}
+
+void AssemblerX86::notl(GPRRegister reg) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF7);
+  EmitUint8(0xD0 | reg);
+}
+
+void AssemblerX86::bsrl(GPRRegister dst, GPRRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xBD);
+  EmitRegisterOperand(dst, src);
+}
+
+void AssemblerX86::bt(GPRRegister base, GPRRegister offset) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xA3);
+  EmitRegisterOperand(offset, base);
+}
+
+void AssemblerX86::ret() {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xC3);
+}
+
+void AssemblerX86::ret(const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xC2);
+  assert(imm.is_uint16());
+  EmitUint8(imm.value() & 0xFF);
+  EmitUint8((imm.value() >> 8) & 0xFF);
+}
+
+void AssemblerX86::nop(int size) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  // There are nops up to size 15, but for now just provide up to size 8.
+  assert(0 < size && size <= MAX_NOP_SIZE);
+  switch (size) {
+  case 1:
+    EmitUint8(0x90);
+    break;
+  case 2:
+    EmitUint8(0x66);
+    EmitUint8(0x90);
+    break;
+  case 3:
+    EmitUint8(0x0F);
+    EmitUint8(0x1F);
+    EmitUint8(0x00);
+    break;
+  case 4:
+    EmitUint8(0x0F);
+    EmitUint8(0x1F);
+    EmitUint8(0x40);
+    EmitUint8(0x00);
+    break;
+  case 5:
+    EmitUint8(0x0F);
+    EmitUint8(0x1F);
+    EmitUint8(0x44);
+    EmitUint8(0x00);
+    EmitUint8(0x00);
+    break;
+  case 6:
+    EmitUint8(0x66);
+    EmitUint8(0x0F);
+    EmitUint8(0x1F);
+    EmitUint8(0x44);
+    EmitUint8(0x00);
+    EmitUint8(0x00);
+    break;
+  case 7:
+    EmitUint8(0x0F);
+    EmitUint8(0x1F);
+    EmitUint8(0x80);
+    EmitUint8(0x00);
+    EmitUint8(0x00);
+    EmitUint8(0x00);
+    EmitUint8(0x00);
+    break;
+  case 8:
+    EmitUint8(0x0F);
+    EmitUint8(0x1F);
+    EmitUint8(0x84);
+    EmitUint8(0x00);
+    EmitUint8(0x00);
+    EmitUint8(0x00);
+    EmitUint8(0x00);
+    EmitUint8(0x00);
+    break;
+  default:
+    llvm_unreachable("Unimplemented");
+  }
+}
+
+void AssemblerX86::int3() {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xCC);
+}
+
+void AssemblerX86::hlt() {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF4);
+}
+
+void AssemblerX86::j(CondX86::BrCond condition, Label *label, bool near) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  if (label->IsBound()) {
+    static const int kShortSize = 2;
+    static const int kLongSize = 6;
+    intptr_t offset = label->Position() - buffer_.Size();
+    assert(offset <= 0);
+    if (Utils::IsInt(8, offset - kShortSize)) {
+      EmitUint8(0x70 + condition);
+      EmitUint8((offset - kShortSize) & 0xFF);
+    } else {
+      EmitUint8(0x0F);
+      EmitUint8(0x80 + condition);
+      EmitInt32(offset - kLongSize);
+    }
+  } else if (near) {
+    EmitUint8(0x70 + condition);
+    EmitNearLabelLink(label);
+  } else {
+    EmitUint8(0x0F);
+    EmitUint8(0x80 + condition);
+    EmitLabelLink(label);
+  }
+}
+
+void AssemblerX86::j(CondX86::BrCond condition,
+                     const ConstantRelocatable *label) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x80 + condition);
+  EmitFixup(DirectCallRelocation::create(this, FK_PcRel_4, label));
+  EmitInt32(-4);
+}
+
+void AssemblerX86::jmp(GPRRegister reg) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xFF);
+  EmitRegisterOperand(4, reg);
+}
+
+void AssemblerX86::jmp(Label *label, bool near) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  if (label->IsBound()) {
+    static const int kShortSize = 2;
+    static const int kLongSize = 5;
+    intptr_t offset = label->Position() - buffer_.Size();
+    assert(offset <= 0);
+    if (Utils::IsInt(8, offset - kShortSize)) {
+      EmitUint8(0xEB);
+      EmitUint8((offset - kShortSize) & 0xFF);
+    } else {
+      EmitUint8(0xE9);
+      EmitInt32(offset - kLongSize);
+    }
+  } else if (near) {
+    EmitUint8(0xEB);
+    EmitNearLabelLink(label);
+  } else {
+    EmitUint8(0xE9);
+    EmitLabelLink(label);
+  }
+}
+
+void AssemblerX86::jmp(const ConstantRelocatable *label) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xE9);
+  EmitFixup(DirectCallRelocation::create(this, FK_PcRel_4, label));
+  EmitInt32(-4);
+}
+
+void AssemblerX86::lock() {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF0);
+}
+
+void AssemblerX86::cmpxchgl(const Address &address, GPRRegister reg) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xB1);
+  EmitOperand(reg, address);
+}
+
+void AssemblerX86::Align(intptr_t alignment, intptr_t offset) {
+  assert(llvm::isPowerOf2_32(alignment));
+  intptr_t pos = offset + buffer_.GetPosition();
+  intptr_t mod = pos & (alignment - 1);
+  if (mod == 0) {
+    return;
+  }
+  intptr_t bytes_needed = alignment - mod;
+  while (bytes_needed > MAX_NOP_SIZE) {
+    nop(MAX_NOP_SIZE);
+    bytes_needed -= MAX_NOP_SIZE;
+  }
+  if (bytes_needed) {
+    nop(bytes_needed);
+  }
+  assert(((offset + buffer_.GetPosition()) & (alignment - 1)) == 0);
+}
+
+void AssemblerX86::Bind(Label *label) {
+  intptr_t bound = buffer_.Size();
+  assert(!label->IsBound()); // Labels can only be bound once.
+  while (label->IsLinked()) {
+    intptr_t position = label->LinkPosition();
+    intptr_t next = buffer_.Load<int32_t>(position);
+    buffer_.Store<int32_t>(position, bound - (position + 4));
+    label->position_ = next;
+  }
+  while (label->HasNear()) {
+    intptr_t position = label->NearPosition();
+    intptr_t offset = bound - (position + 1);
+    assert(Utils::IsInt(8, offset));
+    buffer_.Store<int8_t>(position, offset);
+  }
+  label->BindTo(bound);
+}
+
+void AssemblerX86::EmitOperand(int rm, const Operand &operand) {
+  assert(rm >= 0 && rm < 8);
+  const intptr_t length = operand.length_;
+  assert(length > 0);
+  // Emit the ModRM byte updated with the given RM value.
+  assert((operand.encoding_[0] & 0x38) == 0);
+  EmitUint8(operand.encoding_[0] + (rm << 3));
+  if (operand.fixup()) {
+    EmitFixup(operand.fixup());
+  }
+  // Emit the rest of the encoded operand.
+  for (intptr_t i = 1; i < length; i++) {
+    EmitUint8(operand.encoding_[i]);
+  }
+}
+
+void AssemblerX86::EmitImmediate(const Immediate &imm) {
+  EmitInt32(imm.value());
+}
+
+void AssemblerX86::EmitComplexI8(int rm, const Operand &operand,
+                                 const Immediate &immediate) {
+  assert(rm >= 0 && rm < 8);
+  assert(immediate.is_int8());
+  if (operand.IsRegister(RegX8632::Encoded_Reg_eax)) {
+    // Use short form if the destination is al.
+    EmitUint8(0x04 + (rm << 3));
+    EmitUint8(immediate.value() & 0xFF);
+  } else {
+    // Use sign-extended 8-bit immediate.
+    EmitUint8(0x80);
+    EmitOperand(rm, operand);
+    EmitUint8(immediate.value() & 0xFF);
+  }
+}
+
+void AssemblerX86::EmitComplex(int rm, const Operand &operand,
+                               const Immediate &immediate) {
+  assert(rm >= 0 && rm < 8);
+  if (immediate.is_int8()) {
+    // Use sign-extended 8-bit immediate.
+    EmitUint8(0x83);
+    EmitOperand(rm, operand);
+    EmitUint8(immediate.value() & 0xFF);
+  } else if (operand.IsRegister(RegX8632::Encoded_Reg_eax)) {
+    // Use short form if the destination is eax.
+    EmitUint8(0x05 + (rm << 3));
+    EmitImmediate(immediate);
+  } else {
+    EmitUint8(0x81);
+    EmitOperand(rm, operand);
+    EmitImmediate(immediate);
+  }
+}
+
+void AssemblerX86::EmitLabel(Label *label, intptr_t instruction_size) {
+  if (label->IsBound()) {
+    intptr_t offset = label->Position() - buffer_.Size();
+    assert(offset <= 0);
+    EmitInt32(offset - instruction_size);
+  } else {
+    EmitLabelLink(label);
+  }
+}
+
+void AssemblerX86::EmitLabelLink(Label *label) {
+  assert(!label->IsBound());
+  intptr_t position = buffer_.Size();
+  EmitInt32(label->position_);
+  label->LinkTo(position);
+}
+
+void AssemblerX86::EmitNearLabelLink(Label *label) {
+  assert(!label->IsBound());
+  intptr_t position = buffer_.Size();
+  EmitUint8(0);
+  label->NearLinkTo(position);
+}
+
+void AssemblerX86::EmitGenericShift(int rm, GPRRegister reg,
+                                    const Immediate &imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  assert(imm.is_int8());
+  if (imm.value() == 1) {
+    EmitUint8(0xD1);
+    EmitOperand(rm, Operand(reg));
+  } else {
+    EmitUint8(0xC1);
+    EmitOperand(rm, Operand(reg));
+    EmitUint8(imm.value() & 0xFF);
+  }
+}
+
+void AssemblerX86::EmitGenericShift(int rm, const Operand &operand,
+                                    GPRRegister shifter) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  assert(shifter == RegX8632::Encoded_Reg_ecx);
+  EmitUint8(0xD3);
+  EmitOperand(rm, Operand(operand));
+}
+
+} // end of namespace x86
+} // end of namespace Ice