llvm-6502/lib/Target/X86/X86InstrInfo.td

//===- X86InstrInfo.td - Describe the X86 Instruction Set -------*- C++ -*-===//
// 
//                     The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
// 
//===----------------------------------------------------------------------===//
//
// This file describes the X86 instruction set, defining the instructions, and
// properties of the instructions which are needed for code generation, machine
// code emission, and analysis.
//
//===----------------------------------------------------------------------===//

// *mem - Operand definitions for the funky X86 addressing mode operands.
//

class X86MemOperand<ValueType Ty> : Operand<Ty> {
  let NumMIOperands = 4;
  let PrintMethod = "printMemoryOperand";
}
def SSECC : Operand<i8> {
  let PrintMethod = "printSSECC";
}

def i8mem  : X86MemOperand<i8>;
def i16mem : X86MemOperand<i16>;
def i32mem : X86MemOperand<i32>;
def i64mem : X86MemOperand<i64>;
def f32mem : X86MemOperand<f32>;
def f64mem : X86MemOperand<f64>;
def f80mem : X86MemOperand<f80>;

// PCRelative calls need special operand formatting.
let PrintMethod = "printCallOperand" in
  def calltarget : Operand<i32>;

// Format specifies the encoding used by the instruction.  This is part of the
// ad-hoc solution used to emit machine instruction encodings by our machine
// code emitter.
class Format<bits<5> val> {
  bits<5> Value = val;
}

def Pseudo     : Format<0>; def RawFrm     : Format<1>;
def AddRegFrm  : Format<2>; def MRMDestReg : Format<3>;
def MRMDestMem : Format<4>; def MRMSrcReg  : Format<5>;
def MRMSrcMem  : Format<6>;
def MRM0r  : Format<16>; def MRM1r  : Format<17>; def MRM2r  : Format<18>;
def MRM3r  : Format<19>; def MRM4r  : Format<20>; def MRM5r  : Format<21>;
def MRM6r  : Format<22>; def MRM7r  : Format<23>;
def MRM0m  : Format<24>; def MRM1m  : Format<25>; def MRM2m  : Format<26>;
def MRM3m  : Format<27>; def MRM4m  : Format<28>; def MRM5m  : Format<29>;
def MRM6m  : Format<30>; def MRM7m  : Format<31>;

// ImmType - This specifies the immediate type used by an instruction. This is
// part of the ad-hoc solution used to emit machine instruction encodings by our
// machine code emitter.
class ImmType<bits<2> val> {
  bits<2> Value = val;
}
def NoImm  : ImmType<0>;
def Imm8   : ImmType<1>;
def Imm16  : ImmType<2>;
def Imm32  : ImmType<3>;

// FPFormat - This specifies what form this FP instruction has.  This is used by
// the Floating-Point stackifier pass.
class FPFormat<bits<3> val> {
  bits<3> Value = val;
}
def NotFP      : FPFormat<0>;
def ZeroArgFP  : FPFormat<1>;
def OneArgFP   : FPFormat<2>;
def OneArgFPRW : FPFormat<3>;
def TwoArgFP   : FPFormat<4>;
def CompareFP  : FPFormat<5>;
def CondMovFP  : FPFormat<6>;
def SpecialFP  : FPFormat<7>;


class X86Inst<bits<8> opcod, Format f, ImmType i, dag ops, string AsmStr>
  : Instruction {
  let Namespace = "X86";

  bits<8> Opcode = opcod;
  Format Form = f;
  bits<5> FormBits = Form.Value;
  ImmType ImmT = i;
  bits<2> ImmTypeBits = ImmT.Value;

  dag OperandList = ops;
  string AsmString = AsmStr;

  //
  // Attributes specific to X86 instructions...
  //
  bit hasOpSizePrefix = 0; // Does this inst have a 0x66 prefix?

  bits<4> Prefix = 0;       // Which prefix byte does this inst have?
  FPFormat FPForm;          // What flavor of FP instruction is this?
  bits<3> FPFormBits = 0;
}

class Imp<list<Register> uses, list<Register> defs> {
  list<Register> Uses = uses;
  list<Register> Defs = defs;
}


// Prefix byte classes which are used to indicate to the ad-hoc machine code
// emitter that various prefix bytes are required.
class OpSize { bit hasOpSizePrefix = 1; }
class TB     { bits<4> Prefix = 1; }
class REP    { bits<4> Prefix = 2; }
class D8     { bits<4> Prefix = 3; }
class D9     { bits<4> Prefix = 4; }
class DA     { bits<4> Prefix = 5; }
class DB     { bits<4> Prefix = 6; }
class DC     { bits<4> Prefix = 7; }
class DD     { bits<4> Prefix = 8; }
class DE     { bits<4> Prefix = 9; }
class DF     { bits<4> Prefix = 10; }
class XD     { bits<4> Prefix = 11; }
class XS     { bits<4> Prefix = 12; }


//===----------------------------------------------------------------------===//
// Instruction templates...

class I<bits<8> o, Format f, dag ops, string asm>
  : X86Inst<o, f, NoImm, ops, asm>;
class Ii8 <bits<8> o, Format f, dag ops, string asm>
  : X86Inst<o, f, Imm8 , ops, asm>;
class Ii16<bits<8> o, Format f, dag ops, string asm>
  : X86Inst<o, f, Imm16, ops, asm>;
class Ii32<bits<8> o, Format f, dag ops, string asm>
  : X86Inst<o, f, Imm32, ops, asm>;

//===----------------------------------------------------------------------===//
// Instruction list...
//

def PHI : I<0, Pseudo, (ops variable_ops), "PHINODE">;        // PHI node.
def NOOP : I<0x90, RawFrm, (ops), "nop">; // nop

def ADJCALLSTACKDOWN : I<0, Pseudo, (ops i32imm), "#ADJCALLSTACKDOWN">;
def ADJCALLSTACKUP   : I<0, Pseudo, (ops i32imm, i32imm), "#ADJCALLSTACKUP">;
def IMPLICIT_USE     : I<0, Pseudo, (ops variable_ops), "#IMPLICIT_USE">;
def IMPLICIT_DEF     : I<0, Pseudo, (ops variable_ops), "#IMPLICIT_DEF">;
let isTerminator = 1 in
  let Defs = [FP0, FP1, FP2, FP3, FP4, FP5, FP6] in
    def FP_REG_KILL  : I<0, Pseudo, (ops), "#FP_REG_KILL">;

//===----------------------------------------------------------------------===//
//  Control Flow Instructions...
//

// Return instructions.
let isTerminator = 1, isReturn = 1, isBarrier = 1 in
  def RET : I<0xC3, RawFrm, (ops), "ret">;
let isTerminator = 1, isReturn = 1, isBarrier = 1 in
  def RETI : Ii16<0xC2, RawFrm, (ops i16imm:$amt), "ret $amt">;

// All branches are RawFrm, Void, Branch, and Terminators
let isBranch = 1, isTerminator = 1 in
  class IBr<bits<8> opcode, dag ops, string asm> : I<opcode, RawFrm, ops, asm>;

let isBarrier = 1 in
  def JMP : IBr<0xE9, (ops i32imm:$dst), "jmp $dst">;
def JB  : IBr<0x82, (ops i32imm:$dst), "jb $dst">, TB;
def JAE : IBr<0x83, (ops i32imm:$dst), "jae $dst">, TB;
def JE  : IBr<0x84, (ops i32imm:$dst), "je $dst">, TB;
def JNE : IBr<0x85, (ops i32imm:$dst), "jne $dst">, TB;
def JBE : IBr<0x86, (ops i32imm:$dst), "jbe $dst">, TB;
def JA  : IBr<0x87, (ops i32imm:$dst), "ja $dst">, TB;
def JS  : IBr<0x88, (ops i32imm:$dst), "js $dst">, TB;
def JNS : IBr<0x89, (ops i32imm:$dst), "jns $dst">, TB;
def JP  : IBr<0x8A, (ops i32imm:$dst), "jp $dst">, TB;
def JNP : IBr<0x8B, (ops i32imm:$dst), "jnp $dst">, TB;
def JL  : IBr<0x8C, (ops i32imm:$dst), "jl $dst">, TB;
def JGE : IBr<0x8D, (ops i32imm:$dst), "jge $dst">, TB;
def JLE : IBr<0x8E, (ops i32imm:$dst), "jle $dst">, TB;
def JG  : IBr<0x8F, (ops i32imm:$dst), "jg $dst">, TB;


//===----------------------------------------------------------------------===//
//  Call Instructions...
//
let isCall = 1 in
  // All calls clobber the non-callee saved registers...
  let Defs = [EAX, ECX, EDX, FP0, FP1, FP2, FP3, FP4, FP5, FP6, ST0,
              XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7] in {
    def CALLpcrel32 : I<0xE8, RawFrm, (ops calltarget:$dst), "call $dst">;
    def CALL32r     : I<0xFF, MRM2r, (ops R32:$dst), "call {*}$dst">;
    def CALL32m     : I<0xFF, MRM2m, (ops i32mem:$dst), "call {*}$dst">;
  }

// Tail call stuff.
let isCall = 1, isTerminator = 1, isReturn = 1, isBarrier = 1 in
  def TAILJMPd : IBr<0xE9, (ops calltarget:$dst), "jmp $dst  # TAIL CALL">;
let isCall = 1, isTerminator = 1, isReturn = 1, isBarrier = 1 in
  def TAILJMPr : I<0xFF, MRM4r, (ops R32:$dst), "jmp {*}$dst  # TAIL CALL">;
let isCall = 1, isTerminator = 1, isReturn = 1, isBarrier = 1 in
  def TAILJMPm : I<0xFF, MRM4m, (ops i32mem:$dst), "jmp {*}$dst  # TAIL CALL">;

// ADJSTACKPTRri - This is a standard ADD32ri instruction, identical in every
// way, except that it is marked as being a terminator.  This causes the epilog
// inserter to insert reloads of callee saved registers BEFORE this.  We need
// this until we have a more accurate way of tracking where the stack pointer is
// within a function.
let isTerminator = 1, isTwoAddress = 1 in
  def ADJSTACKPTRri : Ii32<0x81, MRM0r, (ops R32:$dst, R32:$src1, i32imm:$src2),
                           "add{l} {$src2, $dst|$dst, $src2}">;

//===----------------------------------------------------------------------===//
//  Miscellaneous Instructions...
//
def LEAVE    : I<0xC9, RawFrm,
                 (ops), "leave">, Imp<[EBP,ESP],[EBP,ESP]>;
def POP32r   : I<0x58, AddRegFrm,
                 (ops R32:$reg), "pop{l} $reg">, Imp<[ESP],[ESP]>;

let isTwoAddress = 1 in                               // R32 = bswap R32
  def BSWAP32r : I<0xC8, AddRegFrm,
                   (ops R32:$dst, R32:$src), "bswap{l} $dst">, TB;

def XCHG8rr  : I<0x86, MRMDestReg,                    // xchg R8, R8
                 (ops R8:$src1, R8:$src2),
                 "xchg{b} {$src2|$src1}, {$src1|$src2}">;
def XCHG16rr : I<0x87, MRMDestReg,                    // xchg R16, R16
                 (ops R16:$src1, R16:$src2),
                 "xchg{w} {$src2|$src1}, {$src1|$src2}">, OpSize;
def XCHG32rr : I<0x87, MRMDestReg,                    // xchg R32, R32
                 (ops R32:$src1, R32:$src2),
                 "xchg{l} {$src2|$src1}, {$src1|$src2}">;

def XCHG8mr  : I<0x86, MRMDestMem,
                 (ops i8mem:$src1, R8:$src2),
                 "xchg{b} {$src2|$src1}, {$src1|$src2}">;
def XCHG16mr : I<0x87, MRMDestMem,
                 (ops i16mem:$src1, R16:$src2),
                 "xchg{w} {$src2|$src1}, {$src1|$src2}">, OpSize;
def XCHG32mr : I<0x87, MRMDestMem,
                 (ops i32mem:$src1, R32:$src2),
                 "xchg{l} {$src2|$src1}, {$src1|$src2}">;
def XCHG8rm  : I<0x86, MRMSrcMem,
                 (ops R8:$src1, i8mem:$src2),
                 "xchg{b} {$src2|$src1}, {$src1|$src2}">;
def XCHG16rm : I<0x87, MRMSrcMem,
                 (ops R16:$src1, i16mem:$src2),
                 "xchg{w} {$src2|$src1}, {$src1|$src2}">, OpSize;
def XCHG32rm : I<0x87, MRMSrcMem,
                 (ops R32:$src1, i32mem:$src2),
                 "xchg{l} {$src2|$src1}, {$src1|$src2}">;

def LEA16r   : I<0x8D, MRMSrcMem,
                 (ops R16:$dst, i32mem:$src),
                 "lea{w} {$src|$dst}, {$dst|$src}">, OpSize;
def LEA32r   : I<0x8D, MRMSrcMem,
                 (ops R32:$dst, i32mem:$src),
                 "lea{l} {$src|$dst}, {$dst|$src}">;


def REP_MOVSB : I<0xA4, RawFrm, (ops), "{rep;movsb|rep movsb}">,
                Imp<[ECX,EDI,ESI], [ECX,EDI,ESI]>, REP;
def REP_MOVSW : I<0xA5, RawFrm, (ops), "{rep;movsw|rep movsw}">,
                Imp<[ECX,EDI,ESI], [ECX,EDI,ESI]>, REP, OpSize;
def REP_MOVSD : I<0xA5, RawFrm, (ops), "{rep;movsd|rep movsd}">,
                Imp<[ECX,EDI,ESI], [ECX,EDI,ESI]>, REP;

def REP_STOSB : I<0xAA, RawFrm, (ops), "{rep;stosb|rep stosb}">,
                Imp<[AL,ECX,EDI], [ECX,EDI]>, REP;
def REP_STOSW : I<0xAB, RawFrm, (ops), "{rep;stosw|rep stosw}">,
                Imp<[AX,ECX,EDI], [ECX,EDI]>, REP, OpSize;
def REP_STOSD : I<0xAB, RawFrm, (ops), "{rep;stosl|rep stosd}">,
                Imp<[EAX,ECX,EDI], [ECX,EDI]>, REP;


//===----------------------------------------------------------------------===//
//  Input/Output Instructions...
//
def IN8rr  : I<0xEC, RawFrm, (ops),
               "in{b} {%dx, %al|%AL, %DX}">,  Imp<[DX], [AL]>;
def IN16rr : I<0xED, RawFrm, (ops),
               "in{w} {%dx, %ax|%AX, %DX}">,  Imp<[DX], [AX]>, OpSize;
def IN32rr : I<0xED, RawFrm, (ops),
               "in{l} {%dx, %eax|%EAX, %DX}">, Imp<[DX],[EAX]>;

def IN8ri  : Ii16<0xE4, RawFrm, (ops i16imm:$port),
                  "in{b} {$port, %al|%AL, $port}">,  Imp<[], [AL]>;
def IN16ri : Ii16<0xE5, RawFrm, (ops i16imm:$port),
                  "in{w} {$port, %ax|%AX, $port}">,  Imp<[], [AX]>, OpSize;
def IN32ri : Ii16<0xE5, RawFrm, (ops i16imm:$port),
                  "in{l} {$port, %eax|%EAX, $port}">, Imp<[],[EAX]>;

def OUT8rr  : I<0xEE, RawFrm, (ops),
                "out{b} {%al, %dx|%DX, %AL}">,  Imp<[DX,  AL], []>;
def OUT16rr : I<0xEF, RawFrm, (ops),
                "out{w} {%ax, %dx|%DX, %AX}">,  Imp<[DX,  AX], []>, OpSize;
def OUT32rr : I<0xEF, RawFrm, (ops),
                "out{l} {%eax, %dx|%DX, %EAX}">, Imp<[DX, EAX], []>;

def OUT8ir  : Ii16<0xE6, RawFrm, (ops i16imm:$port),
                   "out{b} {%al, $port|$port, %AL}">, Imp<[AL], []>;
def OUT16ir : Ii16<0xE7, RawFrm, (ops i16imm:$port),
                   "out{w} {%ax, $port|$port, %AX}">, Imp<[AX], []>, OpSize;
def OUT32ir : Ii16<0xE7, RawFrm, (ops i16imm:$port),
                   "out{l} {%eax, $port|$port, %EAX}">, Imp<[EAX], []>;

//===----------------------------------------------------------------------===//
//  Move Instructions...
//
def MOV8rr  : I<0x88, MRMDestReg, (ops R8 :$dst, R8 :$src),
                "mov{b} {$src, $dst|$dst, $src}">;
def MOV16rr : I<0x89, MRMDestReg, (ops R16:$dst, R16:$src),
                "mov{w} {$src, $dst|$dst, $src}">, OpSize;
def MOV32rr : I<0x89, MRMDestReg, (ops R32:$dst, R32:$src),
                "mov{l} {$src, $dst|$dst, $src}">;
def MOV8ri  : Ii8 <0xB0, AddRegFrm, (ops R8 :$dst, i8imm :$src),
                   "mov{b} {$src, $dst|$dst, $src}">;
def MOV16ri : Ii16<0xB8, AddRegFrm, (ops R16:$dst, i16imm:$src),
                   "mov{w} {$src, $dst|$dst, $src}">, OpSize;
def MOV32ri : Ii32<0xB8, AddRegFrm, (ops R32:$dst, i32imm:$src),
                   "mov{l} {$src, $dst|$dst, $src}">;
def MOV8mi  : Ii8 <0xC6, MRM0m, (ops i8mem :$dst, i8imm :$src),
                   "mov{b} {$src, $dst|$dst, $src}">;
def MOV16mi : Ii16<0xC7, MRM0m, (ops i16mem:$dst, i16imm:$src),
                   "mov{w} {$src, $dst|$dst, $src}">, OpSize;
def MOV32mi : Ii32<0xC7, MRM0m, (ops i32mem:$dst, i32imm:$src),
                   "mov{l} {$src, $dst|$dst, $src}">;

def MOV8rm  : I<0x8A, MRMSrcMem, (ops R8 :$dst, i8mem :$src),
                "mov{b} {$src, $dst|$dst, $src}">;
def MOV16rm : I<0x8B, MRMSrcMem, (ops R16:$dst, i16mem:$src),
                "mov{w} {$src, $dst|$dst, $src}">, OpSize;
def MOV32rm : I<0x8B, MRMSrcMem, (ops R32:$dst, i32mem:$src),
                "mov{l} {$src, $dst|$dst, $src}">;

def MOV8mr  : I<0x88, MRMDestMem, (ops i8mem :$dst, R8 :$src),
                "mov{b} {$src, $dst|$dst, $src}">;
def MOV16mr : I<0x89, MRMDestMem, (ops i16mem:$dst, R16:$src),
                "mov{w} {$src, $dst|$dst, $src}">, OpSize;
def MOV32mr : I<0x89, MRMDestMem, (ops i32mem:$dst, R32:$src),
                "mov{l} {$src, $dst|$dst, $src}">;
                
//===----------------------------------------------------------------------===//
//  Fixed-Register Multiplication and Division Instructions...
//

// Extra precision multiplication
def MUL8r  : I<0xF6, MRM4r, (ops R8:$src), "mul{b} $src">,
             Imp<[AL],[AX]>;               // AL,AH = AL*R8
def MUL16r : I<0xF7, MRM4r, (ops R16:$src), "mul{w} $src">,
             Imp<[AX],[AX,DX]>, OpSize;    // AX,DX = AX*R16
def MUL32r : I<0xF7, MRM4r, (ops R32:$src), "mul{l} $src">,
             Imp<[EAX],[EAX,EDX]>;         // EAX,EDX = EAX*R32
def MUL8m  : I<0xF6, MRM4m, (ops i8mem :$src),
               "mul{b} $src">, Imp<[AL],[AX]>;            // AL,AH = AL*[mem8]
def MUL16m : I<0xF7, MRM4m, (ops i16mem:$src),
               "mul{w} $src">, Imp<[AX],[AX,DX]>, OpSize; // AX,DX = AX*[mem16]
def MUL32m : I<0xF7, MRM4m, (ops i32mem:$src),
               "mul{l} $src">, Imp<[EAX],[EAX,EDX]>;   // EAX,EDX = EAX*[mem32]

def IMUL8r  : I<0xF6, MRM5r, (ops R8:$src), "imul{b} $src">,
              Imp<[AL],[AX]>;               // AL,AH = AL*R8
def IMUL16r : I<0xF7, MRM5r, (ops R16:$src), "imul{w} $src">,
              Imp<[AX],[AX,DX]>, OpSize;    // AX,DX = AX*R16
def IMUL32r : I<0xF7, MRM5r, (ops R32:$src), "imul{l} $src">,
              Imp<[EAX],[EAX,EDX]>;         // EAX,EDX = EAX*R32
def IMUL8m  : I<0xF6, MRM5m, (ops i8mem :$src),
                "imul{b} $src">, Imp<[AL],[AX]>;           // AL,AH = AL*[mem8]
def IMUL16m : I<0xF7, MRM5m, (ops i16mem:$src),
                "imul{w} $src">, Imp<[AX],[AX,DX]>, OpSize;// AX,DX = AX*[mem16]
def IMUL32m : I<0xF7, MRM5m, (ops i32mem:$src),
                "imul{l} $src">, Imp<[EAX],[EAX,EDX]>;  // EAX,EDX = EAX*[mem32]

// unsigned division/remainder
def DIV8r  : I<0xF6, MRM6r, (ops R8:$src),          // AX/r8 = AL,AH
               "div{b} $src">, Imp<[AX],[AX]>;
def DIV16r : I<0xF7, MRM6r, (ops R16:$src),         // DX:AX/r16 = AX,DX
               "div{w} $src">, Imp<[AX,DX],[AX,DX]>, OpSize;
def DIV32r : I<0xF7, MRM6r, (ops R32:$src),         // EDX:EAX/r32 = EAX,EDX
               "div{l} $src">, Imp<[EAX,EDX],[EAX,EDX]>;
def DIV8m  : I<0xF6, MRM6m, (ops i8mem:$src),       // AX/[mem8] = AL,AH
               "div{b} $src">, Imp<[AX],[AX]>;
def DIV16m : I<0xF7, MRM6m, (ops i16mem:$src),      // DX:AX/[mem16] = AX,DX
               "div{w} $src">, Imp<[AX,DX],[AX,DX]>, OpSize;
def DIV32m : I<0xF7, MRM6m, (ops i32mem:$src),      // EDX:EAX/[mem32] = EAX,EDX
               "div{l} $src">, Imp<[EAX,EDX],[EAX,EDX]>;

// Signed division/remainder.
def IDIV8r : I<0xF6, MRM7r, (ops R8:$src),          // AX/r8 = AL,AH
               "idiv{b} $src">, Imp<[AX],[AX]>;
def IDIV16r: I<0xF7, MRM7r, (ops R16:$src),         // DX:AX/r16 = AX,DX
               "idiv{w} $src">, Imp<[AX,DX],[AX,DX]>, OpSize;
def IDIV32r: I<0xF7, MRM7r, (ops R32:$src),         // EDX:EAX/r32 = EAX,EDX
               "idiv{l} $src">, Imp<[EAX,EDX],[EAX,EDX]>;
def IDIV8m : I<0xF6, MRM7m, (ops i8mem:$src),      // AX/[mem8] = AL,AH
               "idiv{b} $src">, Imp<[AX],[AX]>;
def IDIV16m: I<0xF7, MRM7m, (ops i16mem:$src),     // DX:AX/[mem16] = AX,DX
               "idiv{w} $src">, Imp<[AX,DX],[AX,DX]>, OpSize;
def IDIV32m: I<0xF7, MRM7m, (ops i32mem:$src),     // EDX:EAX/[mem32] = EAX,EDX
               "idiv{l} $src">, Imp<[EAX,EDX],[EAX,EDX]>;

// Sign-extenders for division.
def CBW : I<0x98, RawFrm, (ops),
            "{cbtw|cbw}">, Imp<[AL],[AH]>;   // AX = signext(AL)
def CWD : I<0x99, RawFrm, (ops),
            "{cwtd|cwd}">, Imp<[AX],[DX]>;   // DX:AX = signext(AX)
def CDQ : I<0x99, RawFrm, (ops),
            "{cltd|cdq}">, Imp<[EAX],[EDX]>; // EDX:EAX = signext(EAX)
          

//===----------------------------------------------------------------------===//
//  Two address Instructions...
//
let isTwoAddress = 1 in {

// Conditional moves
def CMOVB16rr : I<0x42, MRMSrcReg,       // if <u, R16 = R16
                  (ops R16:$dst, R16:$src1, R16:$src2),
                  "cmovb {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVB16rm : I<0x42, MRMSrcMem,       // if <u, R16 = [mem16]
                  (ops R16:$dst, R16:$src1, i16mem:$src2),
                  "cmovb {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVB32rr : I<0x42, MRMSrcReg,       // if <u, R32 = R32
                  (ops R32:$dst, R32:$src1, R32:$src2),
                  "cmovb {$src2, $dst|$dst, $src2}">, TB;
def CMOVB32rm : I<0x42, MRMSrcMem,       // if <u, R32 = [mem32]
                  (ops R32:$dst, R32:$src1, i32mem:$src2),
                  "cmovb {$src2, $dst|$dst, $src2}">, TB;

def CMOVAE16rr: I<0x43, MRMSrcReg,       // if >=u, R16 = R16
                  (ops R16:$dst, R16:$src1, R16:$src2),
                  "cmovae {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVAE16rm: I<0x43, MRMSrcMem,       // if >=u, R16 = [mem16]
                  (ops R16:$dst, R16:$src1, i16mem:$src2),
                  "cmovae {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVAE32rr: I<0x43, MRMSrcReg,       // if >=u, R32 = R32
                  (ops R32:$dst, R32:$src1, R32:$src2),
                  "cmovae {$src2, $dst|$dst, $src2}">, TB;
def CMOVAE32rm: I<0x43, MRMSrcMem,       // if >=u, R32 = [mem32]
                  (ops R32:$dst, R32:$src1, i32mem:$src2),
                  "cmovae {$src2, $dst|$dst, $src2}">, TB;

def CMOVE16rr : I<0x44, MRMSrcReg,       // if ==, R16 = R16
                  (ops R16:$dst, R16:$src1, R16:$src2),
                  "cmove {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVE16rm : I<0x44, MRMSrcMem,       // if ==, R16 = [mem16]
                  (ops R16:$dst, R16:$src1, i16mem:$src2),
                  "cmove {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVE32rr : I<0x44, MRMSrcReg,       // if ==, R32 = R32
                  (ops R32:$dst, R32:$src1, R32:$src2),
                  "cmove {$src2, $dst|$dst, $src2}">, TB;
def CMOVE32rm : I<0x44, MRMSrcMem,       // if ==, R32 = [mem32]
                  (ops R32:$dst, R32:$src1, i32mem:$src2),
                  "cmove {$src2, $dst|$dst, $src2}">, TB;

def CMOVNE16rr: I<0x45, MRMSrcReg,       // if !=, R16 = R16
                  (ops R16:$dst, R16:$src1, R16:$src2),
                  "cmovne {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVNE16rm: I<0x45, MRMSrcMem,       // if !=, R16 = [mem16]
                  (ops R16:$dst, R16:$src1, i16mem:$src2),
                  "cmovne {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVNE32rr: I<0x45, MRMSrcReg,       // if !=, R32 = R32
                  (ops R32:$dst, R32:$src1, R32:$src2),
                  "cmovne {$src2, $dst|$dst, $src2}">, TB;
def CMOVNE32rm: I<0x45, MRMSrcMem,       // if !=, R32 = [mem32]
                  (ops R32:$dst, R32:$src1, i32mem:$src2),
                  "cmovne {$src2, $dst|$dst, $src2}">, TB;

def CMOVBE16rr: I<0x46, MRMSrcReg,       // if <=u, R16 = R16
                  (ops R16:$dst, R16:$src1, R16:$src2),
                  "cmovbe {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVBE16rm: I<0x46, MRMSrcMem,       // if <=u, R16 = [mem16]
                  (ops R16:$dst, R16:$src1, i16mem:$src2),
                  "cmovbe {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVBE32rr: I<0x46, MRMSrcReg,       // if <=u, R32 = R32
                  (ops R32:$dst, R32:$src1, R32:$src2),
                  "cmovbe {$src2, $dst|$dst, $src2}">, TB;
def CMOVBE32rm: I<0x46, MRMSrcMem,       // if <=u, R32 = [mem32]
                  (ops R32:$dst, R32:$src1, i32mem:$src2),
                  "cmovbe {$src2, $dst|$dst, $src2}">, TB;

def CMOVA16rr : I<0x47, MRMSrcReg,       // if >u, R16 = R16
                  (ops R16:$dst, R16:$src1, R16:$src2),
                  "cmova {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVA16rm : I<0x47, MRMSrcMem,       // if >u, R16 = [mem16]
                  (ops R16:$dst, R16:$src1, i16mem:$src2),
                  "cmova {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVA32rr : I<0x47, MRMSrcReg,       // if >u, R32 = R32
                  (ops R32:$dst, R32:$src1, R32:$src2),
                  "cmova {$src2, $dst|$dst, $src2}">, TB;
def CMOVA32rm : I<0x47, MRMSrcMem,       // if >u, R32 = [mem32]
                  (ops R32:$dst, R32:$src1, i32mem:$src2),
                  "cmova {$src2, $dst|$dst, $src2}">, TB;

def CMOVS16rr : I<0x48, MRMSrcReg,       // if signed, R16 = R16
                  (ops R16:$dst, R16:$src1, R16:$src2),
                  "cmovs {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVS16rm : I<0x48, MRMSrcMem,       // if signed, R16 = [mem16]
                  (ops R16:$dst, R16:$src1, i16mem:$src2),
                  "cmovs {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVS32rr : I<0x48, MRMSrcReg,       // if signed, R32 = R32
                  (ops R32:$dst, R32:$src1, R32:$src2),
                  "cmovs {$src2, $dst|$dst, $src2}">, TB;
def CMOVS32rm : I<0x48, MRMSrcMem,       // if signed, R32 = [mem32]
                  (ops R32:$dst, R32:$src1, i32mem:$src2),
                  "cmovs {$src2, $dst|$dst, $src2}">, TB;

def CMOVNS16rr: I<0x49, MRMSrcReg,       // if !signed, R16 = R16
                  (ops R16:$dst, R16:$src1, R16:$src2),
                  "cmovns {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVNS16rm: I<0x49, MRMSrcMem,       // if !signed, R16 = [mem16]
                  (ops R16:$dst, R16:$src1, i16mem:$src2),
                  "cmovns {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVNS32rr: I<0x49, MRMSrcReg,       // if !signed, R32 = R32
                  (ops R32:$dst, R32:$src1, R32:$src2),
                  "cmovns {$src2, $dst|$dst, $src2}">, TB;
def CMOVNS32rm: I<0x49, MRMSrcMem,       // if !signed, R32 = [mem32]
                  (ops R32:$dst, R32:$src1, i32mem:$src2),
                  "cmovns {$src2, $dst|$dst, $src2}">, TB;

def CMOVP16rr : I<0x4A, MRMSrcReg,       // if parity, R16 = R16
                  (ops R16:$dst, R16:$src1, R16:$src2),
                  "cmovp {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVP16rm : I<0x4A, MRMSrcMem,       // if parity, R16 = [mem16]
                  (ops R16:$dst, R16:$src1, i16mem:$src2),
                  "cmovp {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVP32rr : I<0x4A, MRMSrcReg,       // if parity, R32 = R32
                  (ops R32:$dst, R32:$src1, R32:$src2),
                  "cmovp {$src2, $dst|$dst, $src2}">, TB;
def CMOVP32rm : I<0x4A, MRMSrcMem,       // if parity, R32 = [mem32]
                  (ops R32:$dst, R32:$src1, i32mem:$src2),
                  "cmovp {$src2, $dst|$dst, $src2}">, TB;

 
def CMOVNP16rr : I<0x4B, MRMSrcReg,       // if !parity, R16 = R16
                  (ops R16:$dst, R16:$src1, R16:$src2),
                  "cmovnp {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVNP16rm : I<0x4B, MRMSrcMem,       // if !parity, R16 = [mem16]
                  (ops R16:$dst, R16:$src1, i16mem:$src2),
                  "cmovnp {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVNP32rr : I<0x4B, MRMSrcReg,       // if !parity, R32 = R32
                  (ops R32:$dst, R32:$src1, R32:$src2),
                  "cmovnp {$src2, $dst|$dst, $src2}">, TB;
def CMOVNP32rm : I<0x4B, MRMSrcMem,       // if !parity, R32 = [mem32]
                  (ops R32:$dst, R32:$src1, i32mem:$src2),
                  "cmovnp {$src2, $dst|$dst, $src2}">, TB;


def CMOVL16rr : I<0x4C, MRMSrcReg,       // if <s, R16 = R16
                  (ops R16:$dst, R16:$src1, R16:$src2),
                  "cmovl {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVL16rm : I<0x4C, MRMSrcMem,       // if <s, R16 = [mem16]
                  (ops R16:$dst, R16:$src1, i16mem:$src2),
                  "cmovl {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVL32rr : I<0x4C, MRMSrcReg,       // if <s, R32 = R32
                  (ops R32:$dst, R32:$src1, R32:$src2),
                  "cmovl {$src2, $dst|$dst, $src2}">, TB;
def CMOVL32rm : I<0x4C, MRMSrcMem,       // if <s, R32 = [mem32]
                  (ops R32:$dst, R32:$src1, i32mem:$src2),
                  "cmovl {$src2, $dst|$dst, $src2}">, TB;

def CMOVGE16rr: I<0x4D, MRMSrcReg,       // if >=s, R16 = R16
                  (ops R16:$dst, R16:$src1, R16:$src2),
                  "cmovge {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVGE16rm: I<0x4D, MRMSrcMem,       // if >=s, R16 = [mem16]
                  (ops R16:$dst, R16:$src1, i16mem:$src2),
                  "cmovge {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVGE32rr: I<0x4D, MRMSrcReg,       // if >=s, R32 = R32
                  (ops R32:$dst, R32:$src1, R32:$src2),
                  "cmovge {$src2, $dst|$dst, $src2}">, TB;
def CMOVGE32rm: I<0x4D, MRMSrcMem,       // if >=s, R32 = [mem32]
                  (ops R32:$dst, R32:$src1, i32mem:$src2),
                  "cmovge {$src2, $dst|$dst, $src2}">, TB;

def CMOVLE16rr: I<0x4E, MRMSrcReg,       // if <=s, R16 = R16
                  (ops R16:$dst, R16:$src1, R16:$src2),
                  "cmovle {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVLE16rm: I<0x4E, MRMSrcMem,       // if <=s, R16 = [mem16]
                  (ops R16:$dst, R16:$src1, i16mem:$src2),
                  "cmovle {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVLE32rr: I<0x4E, MRMSrcReg,       // if <=s, R32 = R32
                  (ops R32:$dst, R32:$src1, R32:$src2),
                  "cmovle {$src2, $dst|$dst, $src2}">, TB;
def CMOVLE32rm: I<0x4E, MRMSrcMem,       // if <=s, R32 = [mem32]
                  (ops R32:$dst, R32:$src1, i32mem:$src2),
                  "cmovle {$src2, $dst|$dst, $src2}">, TB;

def CMOVG16rr : I<0x4F, MRMSrcReg,       // if >s, R16 = R16
                  (ops R16:$dst, R16:$src1, R16:$src2),
                  "cmovg {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVG16rm : I<0x4F, MRMSrcMem,       // if >s, R16 = [mem16]
                  (ops R16:$dst, R16:$src1, i16mem:$src2),
                  "cmovg {$src2, $dst|$dst, $src2}">, TB, OpSize;
def CMOVG32rr : I<0x4F, MRMSrcReg,       // if >s, R32 = R32
                  (ops R32:$dst, R32:$src1, R32:$src2),
                  "cmovg {$src2, $dst|$dst, $src2}">, TB;
def CMOVG32rm : I<0x4F, MRMSrcMem,       // if >s, R32 = [mem32]
                  (ops R32:$dst, R32:$src1, i32mem:$src2),
                  "cmovg {$src2, $dst|$dst, $src2}">, TB;

// unary instructions
def NEG8r  : I<0xF6, MRM3r, (ops R8 :$dst, R8 :$src), "neg{b} $dst">;
def NEG16r : I<0xF7, MRM3r, (ops R16:$dst, R16:$src), "neg{w} $dst">, OpSize;
def NEG32r : I<0xF7, MRM3r, (ops R32:$dst, R32:$src), "neg{l} $dst">;
let isTwoAddress = 0 in {
  def NEG8m  : I<0xF6, MRM3m, (ops i8mem :$dst), "neg{b} $dst">;
  def NEG16m : I<0xF7, MRM3m, (ops i16mem:$dst), "neg{w} $dst">, OpSize;
  def NEG32m : I<0xF7, MRM3m, (ops i32mem:$dst), "neg{l} $dst">;
}

def NOT8r  : I<0xF6, MRM2r, (ops R8 :$dst, R8 :$src), "not{b} $dst">;
def NOT16r : I<0xF7, MRM2r, (ops R16:$dst, R16:$src), "not{w} $dst">, OpSize;
def NOT32r : I<0xF7, MRM2r, (ops R32:$dst, R32:$src), "not{l} $dst">;
let isTwoAddress = 0 in {
  def NOT8m  : I<0xF6, MRM2m, (ops i8mem :$dst), "not{b} $dst">;
  def NOT16m : I<0xF7, MRM2m, (ops i16mem:$dst), "not{w} $dst">, OpSize;
  def NOT32m : I<0xF7, MRM2m, (ops i32mem:$dst), "not{l} $dst">;
}

def INC8r  : I<0xFE, MRM0r, (ops R8 :$dst, R8 :$src), "inc{b} $dst">;
let isConvertibleToThreeAddress = 1 in {   // Can transform into LEA.
def INC16r : I<0xFF, MRM0r, (ops R16:$dst, R16:$src), "inc{w} $dst">, OpSize;
def INC32r : I<0xFF, MRM0r, (ops R32:$dst, R32:$src), "inc{l} $dst">;
}
let isTwoAddress = 0 in {
  def INC8m  : I<0xFE, MRM0m, (ops i8mem :$dst), "inc{b} $dst">;
  def INC16m : I<0xFF, MRM0m, (ops i16mem:$dst), "inc{w} $dst">, OpSize;
  def INC32m : I<0xFF, MRM0m, (ops i32mem:$dst), "inc{l} $dst">;
}

def DEC8r  : I<0xFE, MRM1r, (ops R8 :$dst, R8 :$src), "dec{b} $dst">;
let isConvertibleToThreeAddress = 1 in {   // Can transform into LEA.
def DEC16r : I<0xFF, MRM1r, (ops R16:$dst, R16:$src), "dec{w} $dst">, OpSize;
def DEC32r : I<0xFF, MRM1r, (ops R32:$dst, R32:$src), "dec{l} $dst">;
}

let isTwoAddress = 0 in {
  def DEC8m  : I<0xFE, MRM1m, (ops i8mem :$dst), "dec{b} $dst">;
  def DEC16m : I<0xFF, MRM1m, (ops i16mem:$dst), "dec{w} $dst">, OpSize;
  def DEC32m : I<0xFF, MRM1m, (ops i32mem:$dst), "dec{l} $dst">;
}

// Logical operators...
let isCommutable = 1 in {   // X = AND Y, Z   --> X = AND Z, Y
def AND8rr   : I<0x20, MRMDestReg,
                (ops R8 :$dst, R8 :$src1, R8 :$src2),
                "and{b} {$src2, $dst|$dst, $src2}">;
def AND16rr  : I<0x21, MRMDestReg,
                 (ops R16:$dst, R16:$src1, R16:$src2),
                 "and{w} {$src2, $dst|$dst, $src2}">, OpSize;
def AND32rr  : I<0x21, MRMDestReg, 
                 (ops R32:$dst, R32:$src1, R32:$src2),
                 "and{l} {$src2, $dst|$dst, $src2}">;
}

def AND8rm   : I<0x22, MRMSrcMem, 
                 (ops R8 :$dst, R8 :$src1, i8mem :$src2),
                 "and{b} {$src2, $dst|$dst, $src2}">;
def AND16rm  : I<0x23, MRMSrcMem, 
                 (ops R16:$dst, R16:$src1, i16mem:$src2),
                 "and{w} {$src2, $dst|$dst, $src2}">, OpSize;
def AND32rm  : I<0x23, MRMSrcMem,
                 (ops R32:$dst, R32:$src1, i32mem:$src2),
                 "and{l} {$src2, $dst|$dst, $src2}">;

def AND8ri   : Ii8<0x80, MRM4r, 
                   (ops R8 :$dst, R8 :$src1, i8imm :$src2),
                   "and{b} {$src2, $dst|$dst, $src2}">;
def AND16ri  : Ii16<0x81, MRM4r, 
                    (ops R16:$dst, R16:$src1, i16imm:$src2),
                    "and{w} {$src2, $dst|$dst, $src2}">, OpSize;
def AND32ri  : Ii32<0x81, MRM4r, 
                    (ops R32:$dst, R32:$src1, i32imm:$src2),
                    "and{l} {$src2, $dst|$dst, $src2}">;
def AND16ri8 : Ii8<0x83, MRM4r, 
                   (ops R16:$dst, R16:$src1, i8imm:$src2),
                   "and{w} {$src2, $dst|$dst, $src2}" >, OpSize;
def AND32ri8 : Ii8<0x83, MRM4r, 
                   (ops R32:$dst, R32:$src1, i8imm:$src2),
                   "and{l} {$src2, $dst|$dst, $src2}">;

let isTwoAddress = 0 in {
  def AND8mr   : I<0x20, MRMDestMem,
                   (ops i8mem :$dst, R8 :$src),
                   "and{b} {$src, $dst|$dst, $src}">;
  def AND16mr  : I<0x21, MRMDestMem,
                   (ops i16mem:$dst, R16:$src),
                   "and{w} {$src, $dst|$dst, $src}">, OpSize;
  def AND32mr  : I<0x21, MRMDestMem,
                   (ops i32mem:$dst, R32:$src),
                   "and{l} {$src, $dst|$dst, $src}">;
  def AND8mi   : Ii8<0x80, MRM4m,
                     (ops i8mem :$dst, i8imm :$src),
                     "and{b} {$src, $dst|$dst, $src}">;
  def AND16mi  : Ii16<0x81, MRM4m,
                      (ops i16mem:$dst, i16imm:$src),
                      "and{w} {$src, $dst|$dst, $src}">, OpSize;
  def AND32mi  : Ii32<0x81, MRM4m,
                      (ops i32mem:$dst, i32imm:$src),
                      "and{l} {$src, $dst|$dst, $src}">;
  def AND16mi8 : Ii8<0x83, MRM4m,
                     (ops i16mem:$dst, i8imm :$src),
                     "and{w} {$src, $dst|$dst, $src}">, OpSize;
  def AND32mi8 : Ii8<0x83, MRM4m,
                     (ops i32mem:$dst, i8imm :$src),
                     "and{l} {$src, $dst|$dst, $src}">;
}


let isCommutable = 1 in {   // X = OR Y, Z   --> X = OR Z, Y
def OR8rr    : I<0x08, MRMDestReg, (ops R8 :$dst, R8 :$src1, R8 :$src2),
                 "or{b} {$src2, $dst|$dst, $src2}">;
def OR16rr   : I<0x09, MRMDestReg, (ops R16:$dst, R16:$src1, R16:$src2),
                 "or{w} {$src2, $dst|$dst, $src2}">, OpSize;
def OR32rr   : I<0x09, MRMDestReg, (ops R32:$dst, R32:$src1, R32:$src2),
                 "or{l} {$src2, $dst|$dst, $src2}">;
}
def OR8rm    : I<0x0A, MRMSrcMem , (ops R8 :$dst, R8 :$src1, i8mem :$src2),
                 "or{b} {$src2, $dst|$dst, $src2}">;
def OR16rm   : I<0x0B, MRMSrcMem , (ops R16:$dst, R16:$src1, i16mem:$src2),
                 "or{w} {$src2, $dst|$dst, $src2}">, OpSize;
def OR32rm   : I<0x0B, MRMSrcMem , (ops R32:$dst, R32:$src1, i32mem:$src2),
                 "or{l} {$src2, $dst|$dst, $src2}">;

def OR8ri    : Ii8 <0x80, MRM1r, (ops R8 :$dst, R8 :$src1, i8imm:$src2),
                    "or{b} {$src2, $dst|$dst, $src2}">;
def OR16ri   : Ii16<0x81, MRM1r, (ops R16:$dst, R16:$src1, i16imm:$src2),
                    "or{w} {$src2, $dst|$dst, $src2}">, OpSize;
def OR32ri   : Ii32<0x81, MRM1r, (ops R32:$dst, R32:$src1, i32imm:$src2),
                    "or{l} {$src2, $dst|$dst, $src2}">;

def OR16ri8  : Ii8<0x83, MRM1r, (ops R8 :$dst, R8 :$src1, i8imm:$src2),
                   "or{w} {$src2, $dst|$dst, $src2}">, OpSize;
def OR32ri8  : Ii8<0x83, MRM1r, (ops R32:$dst, R32:$src1, i8imm:$src2),
                   "or{l} {$src2, $dst|$dst, $src2}">;
let isTwoAddress = 0 in {
  def OR8mr  : I<0x08, MRMDestMem, (ops i8mem:$dst, R8:$src),
                 "or{b} {$src, $dst|$dst, $src}">;
  def OR16mr : I<0x09, MRMDestMem, (ops i16mem:$dst, R16:$src),
                 "or{w} {$src, $dst|$dst, $src}">, OpSize;
  def OR32mr : I<0x09, MRMDestMem, (ops i32mem:$dst, R32:$src),
                 "or{l} {$src, $dst|$dst, $src}">;
  def OR8mi    : Ii8<0x80, MRM1m, (ops i8mem :$dst, i8imm:$src),
                 "or{b} {$src, $dst|$dst, $src}">;
  def OR16mi   : Ii16<0x81, MRM1m, (ops i16mem:$dst, i16imm:$src),
                 "or{w} {$src, $dst|$dst, $src}">, OpSize;
  def OR32mi   : Ii32<0x81, MRM1m, (ops i32mem:$dst, i32imm:$src),
                 "or{l} {$src, $dst|$dst, $src}">;
  def OR16mi8  : Ii8<0x83, MRM1m, (ops i16mem:$dst, i8imm:$src),
                 "or{w} {$src, $dst|$dst, $src}">, OpSize;
  def OR32mi8  : Ii8<0x83, MRM1m, (ops i32mem:$dst, i8imm:$src),
                 "or{l} {$src, $dst|$dst, $src}">;
}


let isCommutable = 1 in {   // X = XOR Y, Z   --> X = XOR Z, Y
def XOR8rr   : I<0x30, MRMDestReg,
                 (ops R8 :$dst, R8 :$src1, R8 :$src2),
                 "xor{b} {$src2, $dst|$dst, $src2}">;
def XOR16rr  : I<0x31, MRMDestReg, 
                 (ops R16:$dst, R16:$src1, R16:$src2), 
                 "xor{w} {$src2, $dst|$dst, $src2}">, OpSize;
def XOR32rr  : I<0x31, MRMDestReg, 
                 (ops R32:$dst, R32:$src1, R32:$src2), 
                 "xor{l} {$src2, $dst|$dst, $src2}">;
}

def XOR8rm   : I<0x32, MRMSrcMem , 
                 (ops R8 :$dst, R8:$src1, i8mem :$src2), 
                 "xor{b} {$src2, $dst|$dst, $src2}">;
def XOR16rm  : I<0x33, MRMSrcMem , 
                 (ops R16:$dst, R8:$src1, i16mem:$src2), 
                 "xor{w} {$src2, $dst|$dst, $src2}">, OpSize;
def XOR32rm  : I<0x33, MRMSrcMem , 
                 (ops R32:$dst, R8:$src1, i32mem:$src2), 
                 "xor{l} {$src2, $dst|$dst, $src2}">;

def XOR8ri   : Ii8<0x80, MRM6r, 
                   (ops R8:$dst, R8:$src1, i8imm:$src2), 
                   "xor{b} {$src2, $dst|$dst, $src2}">;
def XOR16ri  : Ii16<0x81, MRM6r, 
                    (ops R16:$dst, R16:$src1, i16imm:$src2), 
                    "xor{w} {$src2, $dst|$dst, $src2}">, OpSize;
def XOR32ri  : Ii32<0x81, MRM6r, 
                    (ops R32:$dst, R32:$src1, i32imm:$src2), 
                    "xor{l} {$src2, $dst|$dst, $src2}">;
def XOR16ri8 : Ii8<0x83, MRM6r, 
                   (ops R16:$dst, R16:$src1, i8imm:$src2),
                   "xor{w} {$src2, $dst|$dst, $src2}">, OpSize;
def XOR32ri8 : Ii8<0x83, MRM6r, 
                   (ops R32:$dst, R32:$src1, i8imm:$src2),
                   "xor{l} {$src2, $dst|$dst, $src2}">;
let isTwoAddress = 0 in {
  def XOR8mr   : I<0x30, MRMDestMem,
                   (ops i8mem :$dst, R8 :$src),
                   "xor{b} {$src, $dst|$dst, $src}">;
  def XOR16mr  : I<0x31, MRMDestMem,
                   (ops i16mem:$dst, R16:$src),
                   "xor{w} {$src, $dst|$dst, $src}">, OpSize;
  def XOR32mr  : I<0x31, MRMDestMem,
                   (ops i32mem:$dst, R32:$src),
                   "xor{l} {$src, $dst|$dst, $src}">;
  def XOR8mi   : Ii8<0x80, MRM6m,
                     (ops i8mem :$dst, i8imm :$src),
                     "xor{b} {$src, $dst|$dst, $src}">;
  def XOR16mi  : Ii16<0x81, MRM6m,
                      (ops i16mem:$dst, i16imm:$src),
                      "xor{w} {$src, $dst|$dst, $src}">, OpSize;
  def XOR32mi  : Ii32<0x81, MRM6m,
                      (ops i32mem:$dst, i32imm:$src),
                      "xor{l} {$src, $dst|$dst, $src}">;
  def XOR16mi8 : Ii8<0x83, MRM6m,
                     (ops i16mem:$dst, i8imm :$src),
                     "xor{w} {$src, $dst|$dst, $src}">, OpSize;
  def XOR32mi8 : Ii8<0x83, MRM6m,
                     (ops i32mem:$dst, i8imm :$src),
                     "xor{l} {$src, $dst|$dst, $src}">;
}

// Shift instructions
// FIXME: provide shorter instructions when imm8 == 1
def SHL8rCL  : I<0xD2, MRM4r, (ops R8 :$dst, R8 :$src),
                 "shl{b} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>;
def SHL16rCL : I<0xD3, MRM4r, (ops R16:$dst, R16:$src),
                 "shl{w} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>, OpSize;
def SHL32rCL : I<0xD3, MRM4r, (ops R32:$dst, R32:$src),
                 "shl{l} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>;

def SHL8ri   : Ii8<0xC0, MRM4r, (ops R8 :$dst, R8 :$src1, i8imm:$src2),
                   "shl{b} {$src2, $dst|$dst, $src2}">;
let isConvertibleToThreeAddress = 1 in {   // Can transform into LEA.
def SHL16ri  : Ii8<0xC1, MRM4r, (ops R16:$dst, R16:$src1, i8imm:$src2),
                   "shl{w} {$src2, $dst|$dst, $src2}">, OpSize;
def SHL32ri  : Ii8<0xC1, MRM4r, (ops R32:$dst, R32:$src1, i8imm:$src2),
                   "shl{l} {$src2, $dst|$dst, $src2}">;
}

let isTwoAddress = 0 in {
  def SHL8mCL  : I<0xD2, MRM4m, (ops i8mem :$dst),
                   "shl{b} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>;
  def SHL16mCL : I<0xD3, MRM4m, (ops i16mem:$dst),
                   "shl{w} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>, OpSize;
  def SHL32mCL : I<0xD3, MRM4m, (ops i32mem:$dst),
                   "shl{l} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>;
  def SHL8mi   : Ii8<0xC0, MRM4m, (ops i8mem :$dst, i8imm:$src),
                     "shl{b} {$src, $dst|$dst, $src}">;
  def SHL16mi  : Ii8<0xC1, MRM4m, (ops i16mem:$dst, i8imm:$src),
                     "shl{w} {$src, $dst|$dst, $src}">, OpSize;
  def SHL32mi  : Ii8<0xC1, MRM4m, (ops i32mem:$dst, i8imm:$src),
                     "shl{l} {$src, $dst|$dst, $src}">;
}

def SHR8rCL  : I<0xD2, MRM5r, (ops R8 :$dst, R8 :$src),
                 "shr{b} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>;
def SHR16rCL : I<0xD3, MRM5r, (ops R16:$dst, R16:$src),
                 "shr{w} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>, OpSize;
def SHR32rCL : I<0xD3, MRM5r, (ops R32:$dst, R32:$src),
                 "shr{l} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>;

def SHR8ri   : Ii8<0xC0, MRM5r, (ops R8:$dst, R8:$src1, i8imm:$src2),
                   "shr{b} {$src2, $dst|$dst, $src2}">;
def SHR16ri  : Ii8<0xC1, MRM5r, (ops R16:$dst, R16:$src1, i8imm:$src2),
                   "shr{w} {$src2, $dst|$dst, $src2}">, OpSize;
def SHR32ri  : Ii8<0xC1, MRM5r, (ops R32:$dst, R32:$src1, i8imm:$src2),
                   "shr{l} {$src2, $dst|$dst, $src2}">;

let isTwoAddress = 0 in {
  def SHR8mCL  : I<0xD2, MRM5m, (ops i8mem :$dst),
                   "shr{b} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>;
  def SHR16mCL : I<0xD3, MRM5m, (ops i16mem:$dst),
                   "shr{w} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>, OpSize;
  def SHR32mCL : I<0xD3, MRM5m, (ops i32mem:$dst),
                   "shr{l} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>;
  def SHR8mi   : Ii8<0xC0, MRM5m, (ops i8mem :$dst, i8imm:$src),
                     "shr{b} {$src, $dst|$dst, $src}">;
  def SHR16mi  : Ii8<0xC1, MRM5m, (ops i16mem:$dst, i8imm:$src),
                     "shr{w} {$src, $dst|$dst, $src}">, OpSize;
  def SHR32mi  : Ii8<0xC1, MRM5m, (ops i32mem:$dst, i8imm:$src),
                     "shr{l} {$src, $dst|$dst, $src}">;
}

def SAR8rCL  : I<0xD2, MRM7r, (ops R8 :$dst, R8 :$src),
                 "sar{b} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>;
def SAR16rCL : I<0xD3, MRM7r, (ops R16:$dst, R16:$src),
                 "sar{w} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>, OpSize;
def SAR32rCL : I<0xD3, MRM7r, (ops R32:$dst, R32:$src),
                 "sar{l} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>;

def SAR8ri   : Ii8<0xC0, MRM7r, (ops R8 :$dst, R8 :$src1, i8imm:$src2),
                   "sar{b} {$src2, $dst|$dst, $src2}">;
def SAR16ri  : Ii8<0xC1, MRM7r, (ops R16:$dst, R16:$src1, i8imm:$src2),
                   "sar{w} {$src2, $dst|$dst, $src2}">, OpSize;
def SAR32ri  : Ii8<0xC1, MRM7r, (ops R32:$dst, R32:$src1, i8imm:$src2),
                   "sar{l} {$src2, $dst|$dst, $src2}">;
let isTwoAddress = 0 in {
  def SAR8mCL  : I<0xD2, MRM7m, (ops i8mem :$dst),
                   "sar{b} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>;
  def SAR16mCL : I<0xD3, MRM7m, (ops i16mem:$dst),
                   "sar{w} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>, OpSize;
  def SAR32mCL : I<0xD3, MRM7m, (ops i32mem:$dst), 
                   "sar{l} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>;
  def SAR8mi   : Ii8<0xC0, MRM7m, (ops i8mem :$dst, i8imm:$src),
                     "sar{b} {$src, $dst|$dst, $src}">;
  def SAR16mi  : Ii8<0xC1, MRM7m, (ops i16mem:$dst, i8imm:$src),
                     "sar{w} {$src, $dst|$dst, $src}">, OpSize;
  def SAR32mi  : Ii8<0xC1, MRM7m, (ops i32mem:$dst, i8imm:$src),
                     "sar{l} {$src, $dst|$dst, $src}">;
}

// Rotate instructions
// FIXME: provide shorter instructions when imm8 == 1
def ROL8rCL  : I<0xD2, MRM0r, (ops R8 :$dst, R8 :$src),
                 "rol{b} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>;
def ROL16rCL : I<0xD3, MRM0r, (ops R16:$dst, R16:$src),
                 "rol{w} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>, OpSize;
def ROL32rCL : I<0xD3, MRM0r, (ops R32:$dst, R32:$src),
                 "rol{l} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>;

def ROL8ri   : Ii8<0xC0, MRM0r, (ops R8 :$dst, R8 :$src1, i8imm:$src2),
                   "rol{b} {$src2, $dst|$dst, $src2}">;
def ROL16ri  : Ii8<0xC1, MRM0r, (ops R16:$dst, R16:$src1, i8imm:$src2),
                   "rol{w} {$src2, $dst|$dst, $src2}">, OpSize;
def ROL32ri  : Ii8<0xC1, MRM0r, (ops R32:$dst, R32:$src1, i8imm:$src2),
                   "rol{l} {$src2, $dst|$dst, $src2}">;

let isTwoAddress = 0 in {
  def ROL8mCL  : I<0xD2, MRM0m, (ops i8mem :$dst),
                   "rol{b} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>;
  def ROL16mCL : I<0xD3, MRM0m, (ops i16mem:$dst),
                   "rol{w} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>, OpSize;
  def ROL32mCL : I<0xD3, MRM0m, (ops i32mem:$dst),
                   "rol{l} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>;
  def ROL8mi   : Ii8<0xC0, MRM0m, (ops i8mem :$dst, i8imm:$src),
                     "rol{b} {$src, $dst|$dst, $src}">;
  def ROL16mi  : Ii8<0xC1, MRM0m, (ops i16mem:$dst, i8imm:$src),
                     "rol{w} {$src, $dst|$dst, $src}">, OpSize;
  def ROL32mi  : Ii8<0xC1, MRM0m, (ops i32mem:$dst, i8imm:$src),
                     "rol{l} {$src, $dst|$dst, $src}">;
}

def ROR8rCL  : I<0xD2, MRM1r, (ops R8 :$dst, R8 :$src),
                 "ror{b} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>;
def ROR16rCL : I<0xD3, MRM1r, (ops R16:$dst, R16:$src),
                 "ror{w} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>, OpSize;
def ROR32rCL : I<0xD3, MRM1r, (ops R32:$dst, R32:$src),
                 "ror{l} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>;

def ROR8ri   : Ii8<0xC0, MRM1r, (ops R8 :$dst, R8 :$src1, i8imm:$src2),
                   "ror{b} {$src2, $dst|$dst, $src2}">;
def ROR16ri  : Ii8<0xC1, MRM1r, (ops R16:$dst, R16:$src1, i8imm:$src2),
                   "ror{w} {$src2, $dst|$dst, $src2}">, OpSize;
def ROR32ri  : Ii8<0xC1, MRM1r, (ops R32:$dst, R32:$src1, i8imm:$src2),
                   "ror{l} {$src2, $dst|$dst, $src2}">;
let isTwoAddress = 0 in {
  def ROR8mCL  : I<0xD2, MRM1m, (ops i8mem :$dst),
                   "ror{b} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>;
  def ROR16mCL : I<0xD3, MRM1m, (ops i16mem:$dst),
                   "ror{w} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>, OpSize;
  def ROR32mCL : I<0xD3, MRM1m, (ops i32mem:$dst), 
                   "ror{l} {%cl, $dst|$dst, %CL}">, Imp<[CL],[]>;
  def ROR8mi   : Ii8<0xC0, MRM1m, (ops i8mem :$dst, i8imm:$src),
                     "ror{b} {$src, $dst|$dst, $src}">;
  def ROR16mi  : Ii8<0xC1, MRM1m, (ops i16mem:$dst, i8imm:$src),
                     "ror{w} {$src, $dst|$dst, $src}">, OpSize;
  def ROR32mi  : Ii8<0xC1, MRM1m, (ops i32mem:$dst, i8imm:$src),
                     "ror{l} {$src, $dst|$dst, $src}">;
}



// Double shift instructions (generalizations of rotate)

def SHLD32rrCL : I<0xA5, MRMDestReg, (ops R32:$dst, R32:$src1, R32:$src2),
                   "shld{l} {%cl, $src2, $dst|$dst, $src2, %CL}">,
                   Imp<[CL],[]>, TB;
def SHRD32rrCL : I<0xAD, MRMDestReg, (ops R32:$dst, R32:$src1, R32:$src2),
                   "shrd{l} {%cl, $src2, $dst|$dst, $src2, %CL}">,
                   Imp<[CL],[]>, TB;
def SHLD16rrCL : I<0xA5, MRMDestReg, (ops R16:$dst, R16:$src1, R16:$src2),
                   "shld{w} {%cl, $src2, $dst|$dst, $src2, %CL}">,
                   Imp<[CL],[]>, TB, OpSize;
def SHRD16rrCL : I<0xAD, MRMDestReg, (ops R16:$dst, R16:$src1, R16:$src2),
                   "shrd{w} {%cl, $src2, $dst|$dst, $src2, %CL}">,
                   Imp<[CL],[]>, TB, OpSize;

let isCommutable = 1 in {  // These instructions commute to each other.
def SHLD32rri8 : Ii8<0xA4, MRMDestReg,
                     (ops R32:$dst, R32:$src1, R32:$src2, i8imm:$src3),
                     "shld{l} {$src3, $src2, $dst|$dst, $src2, $src3}">, TB;
def SHRD32rri8 : Ii8<0xAC, MRMDestReg,
                     (ops R32:$dst, R32:$src1, R32:$src2, i8imm:$src3),
                     "shrd{l} {$src3, $src2, $dst|$dst, $src2, $src3}">, TB;
def SHLD16rri8 : Ii8<0xA4, MRMDestReg,
                     (ops R16:$dst, R16:$src1, R16:$src2, i8imm:$src3),
                     "shld{w} {$src3, $src2, $dst|$dst, $src2, $src3}">,
                     TB, OpSize;
def SHRD16rri8 : Ii8<0xAC, MRMDestReg,
                     (ops R16:$dst, R16:$src1, R16:$src2, i8imm:$src3),
                     "shrd{w} {$src3, $src2, $dst|$dst, $src2, $src3}">,
                     TB, OpSize;
}

let isTwoAddress = 0 in {
  def SHLD32mrCL : I<0xA5, MRMDestMem, (ops i32mem:$dst, R32:$src2),
                     "shld{l} {%cl, $src2, $dst|$dst, $src2, %CL}">,
                     Imp<[CL],[]>, TB;
  def SHRD32mrCL : I<0xAD, MRMDestMem, (ops i32mem:$dst, R32:$src2),
                    "shrd{l} {%cl, $src2, $dst|$dst, $src2, %CL}">,
                    Imp<[CL],[]>, TB;
  def SHLD32mri8 : Ii8<0xA4, MRMDestMem,
                      (ops i32mem:$dst, R32:$src2, i8imm:$src3),
                      "shld{l} {$src3, $src2, $dst|$dst, $src2, $src3}">, TB;
  def SHRD32mri8 : Ii8<0xAC, MRMDestMem, 
                       (ops i32mem:$dst, R32:$src2, i8imm:$src3),
                       "shrd{l} {$src3, $src2, $dst|$dst, $src2, $src3}">, TB;

  def SHLD16mrCL : I<0xA5, MRMDestMem, (ops i16mem:$dst, R16:$src2),
                     "shld{w} {%cl, $src2, $dst|$dst, $src2, %CL}">,
                     Imp<[CL],[]>, TB, OpSize;
  def SHRD16mrCL : I<0xAD, MRMDestMem, (ops i16mem:$dst, R16:$src2),
                    "shrd{w} {%cl, $src2, $dst|$dst, $src2, %CL}">,
                    Imp<[CL],[]>, TB, OpSize;
  def SHLD16mri8 : Ii8<0xA4, MRMDestMem,
                      (ops i16mem:$dst, R16:$src2, i8imm:$src3),
                      "shld{w} {$src3, $src2, $dst|$dst, $src2, $src3}">,
                      TB, OpSize;
  def SHRD16mri8 : Ii8<0xAC, MRMDestMem, 
                       (ops i16mem:$dst, R16:$src2, i8imm:$src3),
                       "shrd{w} {$src3, $src2, $dst|$dst, $src2, $src3}">,
                       TB, OpSize;
}


// Arithmetic.
let isCommutable = 1 in {   // X = ADD Y, Z   --> X = ADD Z, Y
def ADD8rr   : I<0x00, MRMDestReg, (ops R8 :$dst, R8 :$src1, R8 :$src2),
                 "add{b} {$src2, $dst|$dst, $src2}">;
let isConvertibleToThreeAddress = 1 in {   // Can transform into LEA.
def ADD16rr  : I<0x01, MRMDestReg, (ops R16:$dst, R16:$src1, R16:$src2),
                 "add{w} {$src2, $dst|$dst, $src2}">, OpSize;
def ADD32rr  : I<0x01, MRMDestReg, (ops R32:$dst, R32:$src1, R32:$src2),
                 "add{l} {$src2, $dst|$dst, $src2}">;
} // end isConvertibleToThreeAddress
} // end isCommutable
def ADD8rm   : I<0x02, MRMSrcMem, (ops R8 :$dst, R8 :$src1, i8mem :$src2),
                 "add{b} {$src2, $dst|$dst, $src2}">;
def ADD16rm  : I<0x03, MRMSrcMem, (ops R16:$dst, R16:$src1, i16mem:$src2),
                 "add{w} {$src2, $dst|$dst, $src2}">, OpSize;
def ADD32rm  : I<0x03, MRMSrcMem, (ops R32:$dst, R32:$src1, i32mem:$src2),
                 "add{l} {$src2, $dst|$dst, $src2}">;

def ADD8ri   : Ii8<0x80, MRM0r, (ops R8:$dst, R8:$src1, i8imm:$src2),
                   "add{b} {$src2, $dst|$dst, $src2}">;

let isConvertibleToThreeAddress = 1 in {   // Can transform into LEA.
def ADD16ri  : Ii16<0x81, MRM0r, (ops R16:$dst, R16:$src1, i16imm:$src2),
                    "add{w} {$src2, $dst|$dst, $src2}">, OpSize;
def ADD32ri  : Ii32<0x81, MRM0r, (ops R32:$dst, R32:$src1, i32imm:$src2),
                    "add{l} {$src2, $dst|$dst, $src2}">;
}

def ADD16ri8 : Ii8<0x83, MRM0r, (ops R16:$dst, R16:$src1, i8imm:$src2),
                   "add{w} {$src2, $dst|$dst, $src2}">, OpSize;
def ADD32ri8 : Ii8<0x83, MRM0r, (ops R32:$dst, R32:$src1, i8imm:$src2),
                   "add{l} {$src2, $dst|$dst, $src2}">;

let isTwoAddress = 0 in {
  def ADD8mr   : I<0x00, MRMDestMem, (ops i8mem :$dst, R8 :$src2),
                   "add{b} {$src2, $dst|$dst, $src2}">;
  def ADD16mr  : I<0x01, MRMDestMem, (ops i16mem:$dst, R16:$src2),
                   "add{w} {$src2, $dst|$dst, $src2}">, OpSize;
  def ADD32mr  : I<0x01, MRMDestMem, (ops i32mem:$dst, R32:$src2),
                   "add{l} {$src2, $dst|$dst, $src2}">;
  def ADD8mi   : Ii8<0x80, MRM0m, (ops i8mem :$dst, i8imm :$src2),
                     "add{b} {$src2, $dst|$dst, $src2}">;
  def ADD16mi  : Ii16<0x81, MRM0m, (ops i16mem:$dst, i16imm:$src2),
                      "add{w} {$src2, $dst|$dst, $src2}">, OpSize;
  def ADD32mi  : Ii32<0x81, MRM0m, (ops i32mem:$dst, i32imm:$src2),
                      "add{l} {$src2, $dst|$dst, $src2}">;
  def ADD16mi8 : Ii8<0x83, MRM0m, (ops i16mem:$dst, i8imm :$src2),
                     "add{w} {$src2, $dst|$dst, $src2}">, OpSize;
  def ADD32mi8 : Ii8<0x83, MRM0m, (ops i32mem:$dst, i8imm :$src2),
                     "add{l} {$src2, $dst|$dst, $src2}">;
}

let isCommutable = 1 in {  // X = ADC Y, Z --> X = ADC Z, Y
def ADC32rr  : I<0x11, MRMDestReg, (ops R32:$dst, R32:$src1, R32:$src2),
                 "adc{l} {$src2, $dst|$dst, $src2}">;
}
def ADC32rm  : I<0x13, MRMSrcMem , (ops R32:$dst, R32:$src1, i32mem:$src2),
                 "adc{l} {$src2, $dst|$dst, $src2}">;
def ADC32ri  : Ii32<0x81, MRM2r, (ops R32:$dst, R32:$src1, i32imm:$src2),
                    "adc{l} {$src2, $dst|$dst, $src2}">;
def ADC32ri8 : Ii8<0x83, MRM2r, (ops R32:$dst, R32:$src1, i8imm:$src2),
                   "adc{l} {$src2, $dst|$dst, $src2}">;

let isTwoAddress = 0 in {
  def ADC32mr  : I<0x11, MRMDestMem, (ops i32mem:$dst, R32:$src2),
                   "adc{l} {$src2, $dst|$dst, $src2}">;
  def ADC32mi  : Ii32<0x81, MRM2m, (ops i32mem:$dst, i32imm:$src2),
                      "adc{l} {$src2, $dst|$dst, $src2}">;
  def ADC32mi8 : Ii8<0x83, MRM2m, (ops i32mem:$dst, i8imm :$src2),
                     "adc{l} {$src2, $dst|$dst, $src2}">;
}

def SUB8rr   : I<0x28, MRMDestReg, (ops R8 :$dst, R8 :$src1, R8 :$src2),
                 "sub{b} {$src2, $dst|$dst, $src2}">;
def SUB16rr  : I<0x29, MRMDestReg, (ops R16:$dst, R16:$src1, R16:$src2),
                 "sub{w} {$src2, $dst|$dst, $src2}">, OpSize;
def SUB32rr  : I<0x29, MRMDestReg, (ops R32:$dst, R32:$src1, R32:$src2),
                 "sub{l} {$src2, $dst|$dst, $src2}">;
def SUB8rm   : I<0x2A, MRMSrcMem, (ops R8 :$dst, R8 :$src1, i8mem :$src2),
                 "sub{b} {$src2, $dst|$dst, $src2}">;
def SUB16rm  : I<0x2B, MRMSrcMem, (ops R16:$dst, R16:$src1, i16mem:$src2),
                 "sub{w} {$src2, $dst|$dst, $src2}">, OpSize;
def SUB32rm  : I<0x2B, MRMSrcMem, (ops R32:$dst, R32:$src1, i32mem:$src2),
                 "sub{l} {$src2, $dst|$dst, $src2}">;

def SUB8ri   : Ii8 <0x80, MRM5r, (ops R8:$dst, R8:$src1, i8imm:$src2),
                    "sub{b} {$src2, $dst|$dst, $src2}">;
def SUB16ri  : Ii16<0x81, MRM5r, (ops R16:$dst, R16:$src1, i16imm:$src2),
                    "sub{w} {$src2, $dst|$dst, $src2}">, OpSize;
def SUB32ri  : Ii32<0x81, MRM5r, (ops R32:$dst, R32:$src1, i32imm:$src2),
                    "sub{l} {$src2, $dst|$dst, $src2}">;
def SUB16ri8 : Ii8<0x83, MRM5r, (ops R16:$dst, R16:$src1, i8imm:$src2),
                   "sub{w} {$src2, $dst|$dst, $src2}">, OpSize;
def SUB32ri8 : Ii8<0x83, MRM5r, (ops R32:$dst, R32:$src1, i8imm:$src2),
                   "sub{l} {$src2, $dst|$dst, $src2}">;
let isTwoAddress = 0 in {
  def SUB8mr   : I<0x28, MRMDestMem, (ops i8mem :$dst, R8 :$src2),
                   "sub{b} {$src2, $dst|$dst, $src2}">;
  def SUB16mr  : I<0x29, MRMDestMem, (ops i16mem:$dst, R16:$src2),
                   "sub{w} {$src2, $dst|$dst, $src2}">, OpSize;
  def SUB32mr  : I<0x29, MRMDestMem, (ops i32mem:$dst, R32:$src2), 
                   "sub{l} {$src2, $dst|$dst, $src2}">;
  def SUB8mi   : Ii8<0x80, MRM5m, (ops i8mem :$dst, i8imm:$src2), 
                     "sub{b} {$src2, $dst|$dst, $src2}">;
  def SUB16mi  : Ii16<0x81, MRM5m, (ops i16mem:$dst, i16imm:$src2), 
                      "sub{w} {$src2, $dst|$dst, $src2}">, OpSize;
  def SUB32mi  : Ii32<0x81, MRM5m, (ops i32mem:$dst, i32imm:$src2), 
                      "sub{l} {$src2, $dst|$dst, $src2}">;
  def SUB16mi8 : Ii8<0x83, MRM5m, (ops i16mem:$dst, i8imm :$src2), 
                     "sub{w} {$src2, $dst|$dst, $src2}">, OpSize;
  def SUB32mi8 : Ii8<0x83, MRM5m, (ops i32mem:$dst, i8imm :$src2), 
                     "sub{l} {$src2, $dst|$dst, $src2}">;
}

def SBB32rr    : I<0x19, MRMDestReg, (ops R32:$dst, R32:$src1, R32:$src2),
                  "sbb{l} {$src2, $dst|$dst, $src2}">;

let isTwoAddress = 0 in {
  def SBB32mr  : I<0x19, MRMDestMem, (ops i32mem:$dst, R32:$src2), 
                   "sbb{l} {$src2, $dst|$dst, $src2}">;
  def SBB8mi  : Ii32<0x80, MRM3m, (ops i8mem:$dst, i8imm:$src2), 
                      "sbb{b} {$src2, $dst|$dst, $src2}">;
  def SBB16mi  : Ii32<0x81, MRM3m, (ops i16mem:$dst, i16imm:$src2), 
                      "sbb{w} {$src2, $dst|$dst, $src2}">, OpSize;
  def SBB32mi  : Ii32<0x81, MRM3m, (ops i32mem:$dst, i32imm:$src2), 
                      "sbb{l} {$src2, $dst|$dst, $src2}">;
  def SBB16mi8 : Ii8<0x83, MRM3m, (ops i16mem:$dst, i8imm :$src2), 
                     "sbb{w} {$src2, $dst|$dst, $src2}">, OpSize;
  def SBB32mi8 : Ii8<0x83, MRM3m, (ops i32mem:$dst, i8imm :$src2), 
                     "sbb{l} {$src2, $dst|$dst, $src2}">;
}
def SBB8ri   : Ii8<0x80, MRM3r, (ops R8:$dst, R8:$src1, i8imm:$src2),
                    "sbb{b} {$src2, $dst|$dst, $src2}">;
def SBB16ri  : Ii16<0x81, MRM3r, (ops R16:$dst, R16:$src1, i16imm:$src2),
                    "sbb{w} {$src2, $dst|$dst, $src2}">, OpSize;

def SBB32rm  : I<0x1B, MRMSrcMem, (ops R32:$dst, R32:$src1, i32mem:$src2),
                    "sbb{l} {$src2, $dst|$dst, $src2}">;
def SBB32ri  : Ii32<0x81, MRM3r, (ops R32:$dst, R32:$src1, i32imm:$src2),
                    "sbb{l} {$src2, $dst|$dst, $src2}">;

def SBB16ri8 : Ii8<0x83, MRM3r, (ops R16:$dst, R16:$src1, i8imm:$src2),
                   "sbb{w} {$src2, $dst|$dst, $src2}">, OpSize;
def SBB32ri8 : Ii8<0x83, MRM3r, (ops R32:$dst, R32:$src1, i8imm:$src2),
                   "sbb{l} {$src2, $dst|$dst, $src2}">;

let isCommutable = 1 in {  // X = IMUL Y, Z --> X = IMUL Z, Y
def IMUL16rr : I<0xAF, MRMSrcReg, (ops R16:$dst, R16:$src1, R16:$src2),
                 "imul{w} {$src2, $dst|$dst, $src2}">, TB, OpSize;
def IMUL32rr : I<0xAF, MRMSrcReg, (ops R32:$dst, R32:$src1, R32:$src2),
                 "imul{l} {$src2, $dst|$dst, $src2}">, TB;
}
def IMUL16rm : I<0xAF, MRMSrcMem, (ops R16:$dst, R16:$src1, i16mem:$src2),
                 "imul{w} {$src2, $dst|$dst, $src2}">, TB, OpSize;
def IMUL32rm : I<0xAF, MRMSrcMem, (ops R32:$dst, R32:$src1, i32mem:$src2),
                 "imul{l} {$src2, $dst|$dst, $src2}">, TB;

} // end Two Address instructions

// Suprisingly enough, these are not two address instructions!
def IMUL16rri  : Ii16<0x69, MRMSrcReg,                      // R16 = R16*I16
                      (ops R16:$dst, R16:$src1, i16imm:$src2),
                      "imul{w} {$src2, $src1, $dst|$dst, $src1, $src2}">,
                 OpSize;
def IMUL32rri  : Ii32<0x69, MRMSrcReg,                      // R32 = R32*I32
                      (ops R32:$dst, R32:$src1, i32imm:$src2),
                      "imul{l} {$src2, $src1, $dst|$dst, $src1, $src2}">;
def IMUL16rri8 : Ii8<0x6B, MRMSrcReg,                       // R16 = R16*I8
                     (ops R16:$dst, R16:$src1, i8imm:$src2),
                     "imul{w} {$src2, $src1, $dst|$dst, $src1, $src2}">, OpSize;
def IMUL32rri8 : Ii8<0x6B, MRMSrcReg,                       // R32 = R32*I8
                     (ops R32:$dst, R32:$src1, i8imm:$src2),
                     "imul{l} {$src2, $src1, $dst|$dst, $src1, $src2}">;

def IMUL16rmi  : Ii16<0x69, MRMSrcMem,                      // R16 = [mem16]*I16
                      (ops R32:$dst, i16mem:$src1, i16imm:$src2),
                     "imul{w} {$src2, $src1, $dst|$dst, $src1, $src2}">, OpSize;
def IMUL32rmi  : Ii32<0x69, MRMSrcMem,                      // R32 = [mem32]*I32
                      (ops R32:$dst, i32mem:$src1, i32imm:$src2),
                     "imul{l} {$src2, $src1, $dst|$dst, $src1, $src2}">;
def IMUL16rmi8 : Ii8<0x6B, MRMSrcMem,                       // R16 = [mem16]*I8
                     (ops R32:$dst, i16mem:$src1, i8imm :$src2),
                     "imul{w} {$src2, $src1, $dst|$dst, $src1, $src2}">, OpSize;
def IMUL32rmi8 : Ii8<0x6B, MRMSrcMem,                       // R32 = [mem32]*I8
                     (ops R32:$dst, i32mem:$src1, i8imm: $src2),
                     "imul{l} {$src2, $src1, $dst|$dst, $src1, $src2}">;

//===----------------------------------------------------------------------===//
// Test instructions are just like AND, except they don't generate a result.
//
let isCommutable = 1 in {   // TEST X, Y   --> TEST Y, X
def TEST8rr  : I<0x84, MRMDestReg, (ops R8:$src1, R8:$src2),
                 "test{b} {$src2, $src1|$src1, $src2}">;
def TEST16rr : I<0x85, MRMDestReg, (ops R16:$src1, R16:$src2),
                 "test{w} {$src2, $src1|$src1, $src2}">, OpSize;
def TEST32rr : I<0x85, MRMDestReg, (ops R32:$src1, R32:$src2),
                 "test{l} {$src2, $src1|$src1, $src2}">;
}
def TEST8mr  : I<0x84, MRMDestMem, (ops i8mem :$src1, R8 :$src2),
                 "test{b} {$src2, $src1|$src1, $src2}">;
def TEST16mr : I<0x85, MRMDestMem, (ops i16mem:$src1, R16:$src2),
                 "test{w} {$src2, $src1|$src1, $src2}">, OpSize;
def TEST32mr : I<0x85, MRMDestMem, (ops i32mem:$src1, R32:$src2),
                 "test{l} {$src2, $src1|$src1, $src2}">;
def TEST8rm  : I<0x84, MRMSrcMem, (ops R8 :$src1, i8mem :$src2),
                 "test{b} {$src2, $src1|$src1, $src2}">;
def TEST16rm : I<0x85, MRMSrcMem, (ops R16:$src1, i16mem:$src2),
                 "test{w} {$src2, $src1|$src1, $src2}">, OpSize;
def TEST32rm : I<0x85, MRMSrcMem, (ops R32:$src1, i32mem:$src2),
                 "test{l} {$src2, $src1|$src1, $src2}">;

def TEST8ri  : Ii8 <0xF6, MRM0r,                     // flags = R8  & imm8
                    (ops R8:$src1, i8imm:$src2),
                    "test{b} {$src2, $src1|$src1, $src2}">;
def TEST16ri : Ii16<0xF7, MRM0r,                     // flags = R16 & imm16
                    (ops R16:$src1, i16imm:$src2),
                    "test{w} {$src2, $src1|$src1, $src2}">, OpSize;
def TEST32ri : Ii32<0xF7, MRM0r,                     // flags = R32 & imm32
                    (ops R32:$src1, i32imm:$src2),
                    "test{l} {$src2, $src1|$src1, $src2}">;
def TEST8mi  : Ii8 <0xF6, MRM0m,                     // flags = [mem8]  & imm8
                    (ops i32mem:$src1, i8imm:$src2),
                    "test{b} {$src2, $src1|$src1, $src2}">;
def TEST16mi : Ii16<0xF7, MRM0m,                     // flags = [mem16] & imm16
                    (ops i16mem:$src1, i16imm:$src2),
                    "test{w} {$src2, $src1|$src1, $src2}">, OpSize;
def TEST32mi : Ii32<0xF7, MRM0m,                     // flags = [mem32] & imm32
                    (ops i32mem:$src1, i32imm:$src2),
                    "test{l} {$src2, $src1|$src1, $src2}">;



// Condition code ops, incl. set if equal/not equal/...
def SAHF     : I<0x9E, RawFrm, (ops), "sahf">, Imp<[AH],[]>;  // flags = AH
def LAHF     : I<0x9F, RawFrm, (ops), "lahf">, Imp<[],[AH]>;  // AH = flags

def SETBr    : I<0x92, MRM0r,
                 (ops R8   :$dst), "setb $dst">, TB;    // R8 = <  unsign
def SETBm    : I<0x92, MRM0m,
                 (ops i8mem:$dst), "setb $dst">, TB;    // [mem8] = <  unsign
def SETAEr   : I<0x93, MRM0r, 
                 (ops R8   :$dst), "setae $dst">, TB;   // R8 = >= unsign
def SETAEm   : I<0x93, MRM0m, 
                 (ops i8mem:$dst), "setae $dst">, TB;   // [mem8] = >= unsign
def SETEr    : I<0x94, MRM0r, 
                 (ops R8   :$dst), "sete $dst">, TB;    // R8 = ==
def SETEm    : I<0x94, MRM0m, 
                 (ops i8mem:$dst), "sete $dst">, TB;    // [mem8] = ==
def SETNEr   : I<0x95, MRM0r, 
                 (ops R8   :$dst), "setne $dst">, TB;   // R8 = !=
def SETNEm   : I<0x95, MRM0m, 
                 (ops i8mem:$dst), "setne $dst">, TB;   // [mem8] = !=
def SETBEr   : I<0x96, MRM0r, 
                 (ops R8   :$dst), "setbe $dst">, TB;   // R8 = <= unsign
def SETBEm   : I<0x96, MRM0m, 
                 (ops i8mem:$dst), "setbe $dst">, TB;   // [mem8] = <= unsign
def SETAr    : I<0x97, MRM0r, 
                 (ops R8   :$dst), "seta $dst">, TB;    // R8 = >  signed
def SETAm    : I<0x97, MRM0m, 
                 (ops i8mem:$dst), "seta $dst">, TB;    // [mem8] = >  signed
def SETSr    : I<0x98, MRM0r, 
                 (ops R8   :$dst), "sets $dst">, TB;    // R8 = <sign bit>
def SETSm    : I<0x98, MRM0m, 
                 (ops i8mem:$dst), "sets $dst">, TB;    // [mem8] = <sign bit>
def SETNSr   : I<0x99, MRM0r, 
                 (ops R8   :$dst), "setns $dst">, TB;   // R8 = !<sign bit>
def SETNSm   : I<0x99, MRM0m, 
                 (ops i8mem:$dst), "setns $dst">, TB;   // [mem8] = !<sign bit>
def SETPr    : I<0x9A, MRM0r, 
                 (ops R8   :$dst), "setp $dst">, TB;    // R8 = parity
def SETPm    : I<0x9A, MRM0m, 
                 (ops i8mem:$dst), "setp $dst">, TB;    // [mem8] = parity
def SETNPr   : I<0x9B, MRM0r, 
                 (ops R8   :$dst), "setnp $dst">, TB;   // R8 = not parity
def SETNPm   : I<0x9B, MRM0m, 
                 (ops i8mem:$dst), "setnp $dst">, TB;   // [mem8] = not parity
def SETLr    : I<0x9C, MRM0r, 
                 (ops R8   :$dst), "setl $dst">, TB;    // R8 = <  signed
def SETLm    : I<0x9C, MRM0m, 
                 (ops i8mem:$dst), "setl $dst">, TB;    // [mem8] = <  signed
def SETGEr   : I<0x9D, MRM0r, 
                 (ops R8   :$dst), "setge $dst">, TB;   // R8 = >= signed
def SETGEm   : I<0x9D, MRM0m, 
                 (ops i8mem:$dst), "setge $dst">, TB;   // [mem8] = >= signed
def SETLEr   : I<0x9E, MRM0r, 
                 (ops R8   :$dst), "setle $dst">, TB;   // R8 = <= signed
def SETLEm   : I<0x9E, MRM0m, 
                 (ops i8mem:$dst), "setle $dst">, TB;   // [mem8] = <= signed
def SETGr    : I<0x9F, MRM0r, 
                 (ops R8   :$dst), "setg $dst">, TB;    // R8 = <  signed
def SETGm    : I<0x9F, MRM0m, 
                 (ops i8mem:$dst), "setg $dst">, TB;    // [mem8] = <  signed

// Integer comparisons
def CMP8rr  : I<0x38, MRMDestReg,
                (ops R8 :$src1, R8 :$src2),
                "cmp{b} {$src2, $src1|$src1, $src2}">;
def CMP16rr : I<0x39, MRMDestReg,
                (ops R16:$src1, R16:$src2),
                "cmp{w} {$src2, $src1|$src1, $src2}">, OpSize;
def CMP32rr : I<0x39, MRMDestReg,
                (ops R32:$src1, R32:$src2),
                "cmp{l} {$src2, $src1|$src1, $src2}">;
def CMP8mr  : I<0x38, MRMDestMem,
                (ops i8mem :$src1, R8 :$src2),
                "cmp{b} {$src2, $src1|$src1, $src2}">;
def CMP16mr : I<0x39, MRMDestMem,
                (ops i16mem:$src1, R16:$src2),
                "cmp{w} {$src2, $src1|$src1, $src2}">, OpSize;
def CMP32mr : I<0x39, MRMDestMem,
                (ops i32mem:$src1, R32:$src2),
                "cmp{l} {$src2, $src1|$src1, $src2}">;
def CMP8rm  : I<0x3A, MRMSrcMem,
                (ops R8 :$src1, i8mem :$src2),
                "cmp{b} {$src2, $src1|$src1, $src2}">;
def CMP16rm : I<0x3B, MRMSrcMem,
                (ops R16:$src1, i16mem:$src2),
                "cmp{w} {$src2, $src1|$src1, $src2}">, OpSize;
def CMP32rm : I<0x3B, MRMSrcMem,
                (ops R32:$src1, i32mem:$src2),
                "cmp{l} {$src2, $src1|$src1, $src2}">;
def CMP8ri  : Ii8<0x80, MRM7r,
                  (ops R16:$src1, i8imm:$src2),
                  "cmp{b} {$src2, $src1|$src1, $src2}">;
def CMP16ri : Ii16<0x81, MRM7r,
                   (ops R16:$src1, i16imm:$src2),
                   "cmp{w} {$src2, $src1|$src1, $src2}">, OpSize;
def CMP32ri : Ii32<0x81, MRM7r,
                   (ops R32:$src1, i32imm:$src2),
                   "cmp{l} {$src2, $src1|$src1, $src2}">;
def CMP8mi  : Ii8 <0x80, MRM7m,
                   (ops i8mem :$src1, i8imm :$src2),
                   "cmp{b} {$src2, $src1|$src1, $src2}">;
def CMP16mi : Ii16<0x81, MRM7m,
                   (ops i16mem:$src1, i16imm:$src2),
                   "cmp{w} {$src2, $src1|$src1, $src2}">, OpSize;
def CMP32mi : Ii32<0x81, MRM7m,
                   (ops i32mem:$src1, i32imm:$src2),
                   "cmp{l} {$src2, $src1|$src1, $src2}">;

// Sign/Zero extenders
def MOVSX16rr8 : I<0xBE, MRMSrcReg, (ops R16:$dst, R8 :$src),
                   "movs{bw|x} {$src, $dst|$dst, $src}">, TB, OpSize;
def MOVSX16rm8 : I<0xBE, MRMSrcMem, (ops R16:$dst, i8mem :$src),
                   "movs{bw|x} {$src, $dst|$dst, $src}">, TB, OpSize;
def MOVSX32rr8 : I<0xBE, MRMSrcReg, (ops R32:$dst, R8 :$src),
                   "movs{bl|x} {$src, $dst|$dst, $src}">, TB;
def MOVSX32rm8 : I<0xBE, MRMSrcMem, (ops R32:$dst, i8mem :$src),
                   "movs{bl|x} {$src, $dst|$dst, $src}">, TB;
def MOVSX32rr16: I<0xBF, MRMSrcReg, (ops R32:$dst, R16:$src),
                   "movs{wl|x} {$src, $dst|$dst, $src}">, TB;
def MOVSX32rm16: I<0xBF, MRMSrcMem, (ops R32:$dst, i16mem:$src),
                   "movs{wl|x} {$src, $dst|$dst, $src}">, TB;

def MOVZX16rr8 : I<0xB6, MRMSrcReg, (ops R16:$dst, R8 :$src),
                   "movz{bw|x} {$src, $dst|$dst, $src}">, TB, OpSize;
def MOVZX16rm8 : I<0xB6, MRMSrcMem, (ops R16:$dst, i8mem :$src),
                   "movz{bw|x} {$src, $dst|$dst, $src}">, TB, OpSize;
def MOVZX32rr8 : I<0xB6, MRMSrcReg, (ops R32:$dst, R8 :$src),
                   "movz{bl|x} {$src, $dst|$dst, $src}">, TB;
def MOVZX32rm8 : I<0xB6, MRMSrcMem, (ops R32:$dst, i8mem :$src),
                   "movz{bl|x} {$src, $dst|$dst, $src}">, TB;
def MOVZX32rr16: I<0xB7, MRMSrcReg, (ops R32:$dst, R16:$src),
                   "movz{wl|x} {$src, $dst|$dst, $src}">, TB;
def MOVZX32rm16: I<0xB7, MRMSrcMem, (ops R32:$dst, i16mem:$src),
                   "movz{wl|x} {$src, $dst|$dst, $src}">, TB;

//===----------------------------------------------------------------------===//
// XMM Floating point support (requires SSE2)
//===----------------------------------------------------------------------===//

def MOVSSrm : I<0x10, MRMSrcMem, (ops RXMM:$dst, f32mem:$src),
                "movss {$src, $dst|$dst, $src}">, XS;
def MOVSSmr : I<0x11, MRMDestMem, (ops f32mem:$dst, RXMM:$src),
                "movss {$src, $dst|$dst, $src}">, XS;
def MOVSDrm : I<0x10, MRMSrcMem, (ops RXMM:$dst, f64mem:$src),
                "movsd {$src, $dst|$dst, $src}">, XD;
def MOVSDmr : I<0x11, MRMDestMem, (ops f64mem:$dst, RXMM:$src),
                "movsd {$src, $dst|$dst, $src}">, XD;
def MOVAPSrr: I<0x28, MRMSrcReg, (ops RXMM:$dst, RXMM:$src),
                "movaps {$src, $dst|$dst, $src}">, TB;
def MOVAPSrm: I<0x28, MRMSrcMem, (ops RXMM:$dst, f32mem:$src),
                "movaps {$src, $dst|$dst, $src}">, TB;
def MOVAPSmr: I<0x29, MRMDestMem, (ops f32mem:$dst, RXMM:$src),
                "movaps {$src, $dst|$dst, $src}">, TB;
def MOVAPDrr: I<0x28, MRMSrcReg, (ops RXMM:$dst, RXMM:$src),
                "movapd {$src, $dst|$dst, $src}">, TB, OpSize;
def MOVAPDrm: I<0x28, MRMSrcMem, (ops RXMM:$dst, f64mem:$src),
                "movapd {$src, $dst|$dst, $src}">, TB, OpSize;
def MOVAPDmr: I<0x29, MRMDestMem, (ops f64mem:$dst, RXMM:$src),
                "movapd {$src, $dst|$dst, $src}">, TB, OpSize;

def CVTTSD2SIrr: I<0x2C, MRMSrcReg, (ops R32:$dst, RXMM:$src),
                "cvttsd2si {$src, $dst|$dst, $src}">, XD;
def CVTTSD2SIrm: I<0x2C, MRMSrcMem, (ops R32:$dst, f64mem:$src),
                "cvttsd2si {$src, $dst|$dst, $src}">, XD;
def CVTTSS2SIrr: I<0x2C, MRMSrcReg, (ops R32:$dst, RXMM:$src),
                "cvttss2si {$src, $dst|$dst, $src}">, XS;
def CVTTSS2SIrm: I<0x2C, MRMSrcMem, (ops R32:$dst, f32mem:$src),
                "cvttss2si {$src, $dst|$dst, $src}">, XS;
def CVTSD2SSrr: I<0x5A, MRMSrcReg, (ops RXMM:$dst, RXMM:$src),
                "cvtsd2ss {$src, $dst|$dst, $src}">, XS;
def CVTSD2SSrm: I<0x5A, MRMSrcMem, (ops RXMM:$dst, f64mem:$src), 
                "cvtsd2ss {$src, $dst|$dst, $src}">, XS;
def CVTSS2SDrr: I<0x5A, MRMSrcReg, (ops RXMM:$dst, RXMM:$src),
                "cvtss2sd {$src, $dst|$dst, $src}">, XD;
def CVTSS2SDrm: I<0x5A, MRMSrcMem, (ops RXMM:$dst, f32mem:$src),
                "cvtss2sd {$src, $dst|$dst, $src}">, XD;
def CVTSI2SSrr: I<0x2A, MRMSrcReg, (ops R32:$dst, RXMM:$src),
                "cvtsi2ss {$src, $dst|$dst, $src}">, XS;
def CVTSI2SSrm: I<0x2A, MRMSrcMem, (ops R32:$dst, f32mem:$src),
                "cvtsi2ss {$src, $dst|$dst, $src}">, XS;
def CVTSI2SDrr: I<0x2A, MRMSrcReg, (ops R32:$dst, RXMM:$src),
                "cvtsi2sd {$src, $dst|$dst, $src}">, XD;
def CVTSI2SDrm: I<0x2A, MRMSrcMem, (ops R32:$dst, f64mem:$src),
                "cvtsi2sd {$src, $dst|$dst, $src}">, XD;

def SQRTSSrm : I<0x51, MRMSrcMem, (ops RXMM:$dst, f32mem:$src),
                "subss {$src, $dst|$dst, $src}">, XS;
def SQRTSSrr : I<0x51, MRMSrcReg, (ops RXMM:$dst, RXMM:$src),
                "subss {$src, $dst|$dst, $src}">, XS;
def SQRTSDrm : I<0x51, MRMSrcMem, (ops RXMM:$dst, f64mem:$src),
                "subsd {$src, $dst|$dst, $src}">, XD;
def SQRTSDrr : I<0x51, MRMSrcReg, (ops RXMM:$dst, RXMM:$src),
                "subsd {$src, $dst|$dst, $src}">, XD;

def UCOMISDrr: I<0x2E, MRMSrcReg, (ops RXMM:$dst, RXMM:$src),
                "ucomisd {$src, $dst|$dst, $src}">, TB, OpSize;
def UCOMISDrm: I<0x2E, MRMSrcMem, (ops RXMM:$dst, f64mem:$src),
                "ucomisd {$src, $dst|$dst, $src}">, TB, OpSize;
def UCOMISSrr: I<0x2E, MRMSrcReg, (ops RXMM:$dst, RXMM:$src),
                "ucomiss {$src, $dst|$dst, $src}">, TB;
def UCOMISSrm: I<0x2E, MRMSrcMem, (ops RXMM:$dst, f32mem:$src),
                "ucomiss {$src, $dst|$dst, $src}">, TB;

// Pseudo-instructions that map to fld0 to xorps/xorpd for sse.
// FIXME: remove when we can teach regalloc that xor reg, reg is ok.
def FLD0SS : I<0x57, MRMSrcReg, (ops RXMM:$dst),
                "xorps $dst, $dst">, TB;
def FLD0SD : I<0x57, MRMSrcReg, (ops RXMM:$dst),
                "xorpd $dst, $dst">, TB, OpSize;

let isTwoAddress = 1 in {
let isCommutable = 1 in {
def ADDSSrr : I<0x58, MRMSrcReg, (ops RXMM:$dst, RXMM:$src1, RXMM:$src),
                "addss {$src, $dst|$dst, $src}">, XS;
def ADDSDrr : I<0x58, MRMSrcReg, (ops RXMM:$dst, RXMM:$src1, RXMM:$src),
                "addsd {$src, $dst|$dst, $src}">, XD;
def ANDPSrr : I<0x54, MRMSrcReg, (ops RXMM:$dst, RXMM:$src1, RXMM:$src),
                "andps {$src, $dst|$dst, $src}">, TB;
def ANDPDrr : I<0x54, MRMSrcReg, (ops RXMM:$dst, RXMM:$src1, RXMM:$src),
                "andpd {$src, $dst|$dst, $src}">, TB, OpSize;
def MULSSrr : I<0x59, MRMSrcReg, (ops RXMM:$dst, RXMM:$src1, RXMM:$src),
                "mulss {$src, $dst|$dst, $src}">, XS;
def MULSDrr : I<0x59, MRMSrcReg, (ops RXMM:$dst, RXMM:$src1, RXMM:$src),
                "mulsd {$src, $dst|$dst, $src}">, XD;
def ORPSrr : I<0x56, MRMSrcReg, (ops RXMM:$dst, RXMM:$src1, RXMM:$src),
                "orps {$src, $dst|$dst, $src}">, TB;
def ORPDrr : I<0x56, MRMSrcReg, (ops RXMM:$dst, RXMM:$src1, RXMM:$src),
                "orpd {$src, $dst|$dst, $src}">, TB, OpSize;
def XORPSrr : I<0x57, MRMSrcReg, (ops RXMM:$dst, RXMM:$src1, RXMM:$src),
                "xorps {$src, $dst|$dst, $src}">, TB;
def XORPDrr : I<0x57, MRMSrcReg, (ops RXMM:$dst, RXMM:$src1, RXMM:$src),
                "xorpd {$src, $dst|$dst, $src}">, TB, OpSize;
}
def ANDNPSrr : I<0x55, MRMSrcReg, (ops RXMM:$dst, RXMM:$src1, RXMM:$src),
                "andnps {$src, $dst|$dst, $src}">, TB;
def ANDNPDrr : I<0x55, MRMSrcReg, (ops RXMM:$dst, RXMM:$src1, RXMM:$src),
                "andnpd {$src, $dst|$dst, $src}">, TB, OpSize;
def ADDSSrm : I<0x58, MRMSrcMem, (ops RXMM:$dst, RXMM:$src1, f32mem:$src),
                "addss {$src, $dst|$dst, $src}">, XS;
def ADDSDrm : I<0x58, MRMSrcMem, (ops RXMM:$dst, RXMM:$src1, f64mem:$src),
                "addsd {$src, $dst|$dst, $src}">, XD;
def MULSSrm : I<0x59, MRMSrcMem, (ops RXMM:$dst, RXMM:$src1, f32mem:$src),
                "mulss {$src, $dst|$dst, $src}">, XS;
def MULSDrm : I<0x59, MRMSrcMem, (ops RXMM:$dst, RXMM:$src1, f64mem:$src),
                "mulsd {$src, $dst|$dst, $src}">, XD;

def DIVSSrm : I<0x5E, MRMSrcMem, (ops RXMM:$dst, RXMM:$src1, f32mem:$src),
                "divss {$src, $dst|$dst, $src}">, XS;
def DIVSSrr : I<0x5E, MRMSrcReg, (ops RXMM:$dst, RXMM:$src1, RXMM:$src),
                "divss {$src, $dst|$dst, $src}">, XS;
def DIVSDrm : I<0x5E, MRMSrcMem, (ops RXMM:$dst, RXMM:$src1, f64mem:$src),
                "divsd {$src, $dst|$dst, $src}">, XD;
def DIVSDrr : I<0x5E, MRMSrcReg, (ops RXMM:$dst, RXMM:$src1, RXMM:$src),
                "divsd {$src, $dst|$dst, $src}">, XD;

def SUBSSrm : I<0x5C, MRMSrcMem, (ops RXMM:$dst, RXMM:$src1, f32mem:$src),
                "subss {$src, $dst|$dst, $src}">, XS;
def SUBSSrr : I<0x5C, MRMSrcReg, (ops RXMM:$dst, RXMM:$src1, RXMM:$src),
                "subss {$src, $dst|$dst, $src}">, XS;
def SUBSDrm : I<0x5C, MRMSrcMem, (ops RXMM:$dst, RXMM:$src1, f64mem:$src),
                "subsd {$src, $dst|$dst, $src}">, XD;
def SUBSDrr : I<0x5C, MRMSrcReg, (ops RXMM:$dst, RXMM:$src1, RXMM:$src),
                "subsd {$src, $dst|$dst, $src}">, XD;

def CMPSSrr : I<0xC2, MRMSrcReg, 
                (ops RXMM:$dst, RXMM:$src1, RXMM:$src, SSECC:$cc),
                "cmp${cc}ss {$src, $dst|$dst, $src}">, XS;
def CMPSSrm : I<0xC2, MRMSrcMem, 
                (ops RXMM:$dst, RXMM:$src1, f32mem:$src, SSECC:$cc),
                "cmp${cc}ss {$src, $dst|$dst, $src}">, XS;
def CMPSDrr : I<0xC2, MRMSrcReg, 
                (ops RXMM:$dst, RXMM:$src1, RXMM:$src, SSECC:$cc),
                "cmp${cc}sd {$src, $dst|$dst, $src}">, XD;
def CMPSDrm : I<0xC2, MRMSrcMem, 
                (ops RXMM:$dst, RXMM:$src1, f64mem:$src, SSECC:$cc),
                "cmp${cc}sd {$src, $dst|$dst, $src}">, XD;
}

//===----------------------------------------------------------------------===//
// Stack-based Floating point support
//===----------------------------------------------------------------------===//

// FIXME: These need to indicate mod/ref sets for FP regs... & FP 'TOP'

// Floating point instruction template
class FPI<bits<8> o, Format F, FPFormat fp, dag ops, string asm>
  : X86Inst<o, F, NoImm, ops, asm> {
  let FPForm = fp; let FPFormBits = FPForm.Value;
}

// Pseudo instructions for floating point.  We use these pseudo instructions
// because they can be expanded by the fp spackifier into one of many different
// forms of instructions for doing these operations.  Until the stackifier runs,
// we prefer to be abstract.
def FpMOV : FPI<0, Pseudo, SpecialFP,
                (ops RFP, RFP), "">;   // f1 = fmov f2
def FpADD : FPI<0, Pseudo, TwoArgFP ,
                (ops RFP, RFP, RFP), "">;    // f1 = fadd f2, f3
def FpSUB : FPI<0, Pseudo, TwoArgFP ,
                (ops RFP, RFP, RFP), "">;    // f1 = fsub f2, f3
def FpMUL : FPI<0, Pseudo, TwoArgFP ,
                (ops RFP, RFP, RFP), "">;    // f1 = fmul f2, f3
def FpDIV : FPI<0, Pseudo, TwoArgFP ,
                (ops RFP, RFP, RFP), "">;    // f1 = fdiv f2, f3

def FpGETRESULT : FPI<0, Pseudo, SpecialFP, (ops RFP), "">,
                  Imp<[ST0], []>;  // FPR = ST(0)

def FpSETRESULT : FPI<0, Pseudo, SpecialFP, (ops RFP), "">,
                  Imp<[], [ST0]>;  // ST(0) = FPR

// FADD reg, mem: Before stackification, these are represented by:
// R1 = FADD* R2, [mem]
def FADD32m  : FPI<0xD8, MRM0m, OneArgFPRW,    // ST(0) = ST(0) + [mem32real]
                   (ops f32mem:$src, variable_ops),
                   "fadd{s} $src">;
def FADD64m  : FPI<0xDC, MRM0m, OneArgFPRW,    // ST(0) = ST(0) + [mem64real]
                   (ops f64mem:$src, variable_ops),
                   "fadd{l} $src">;
//def FIADD16m : FPI<0xDE, MRM0m, OneArgFPRW>;    // ST(0) = ST(0) + [mem16int]
//def FIADD32m : FPI<0xDA, MRM0m, OneArgFPRW>;    // ST(0) = ST(0) + [mem32int]

// FMUL reg, mem: Before stackification, these are represented by:
// R1 = FMUL* R2, [mem]
def FMUL32m  : FPI<0xD8, MRM1m, OneArgFPRW,    // ST(0) = ST(0) * [mem32real]
                   (ops f32mem:$src, variable_ops),
                   "fmul{s} $src">;
def FMUL64m  : FPI<0xDC, MRM1m, OneArgFPRW,    // ST(0) = ST(0) * [mem64real]
                   (ops f64mem:$src, variable_ops),
                   "fmul{l} $src">;
// ST(0) = ST(0) * [mem16int]
//def FIMUL16m : FPI16m<"fimul", 0xDE, MRM1m, OneArgFPRW>;
// ST(0) = ST(0) * [mem32int]
//def FIMUL32m : FPI32m<"fimul", 0xDA, MRM1m, OneArgFPRW>;

// FSUB reg, mem: Before stackification, these are represented by:
// R1 = FSUB* R2, [mem]
def FSUB32m  : FPI<0xD8, MRM4m, OneArgFPRW,    // ST(0) = ST(0) - [mem32real]
                   (ops f32mem:$src, variable_ops),
                   "fsub{s} $src">;
def FSUB64m  : FPI<0xDC, MRM4m, OneArgFPRW,    // ST(0) = ST(0) - [mem64real]
                   (ops f64mem:$src, variable_ops),
                   "fsub{l} $src">;
// ST(0) = ST(0) - [mem16int]
//def FISUB16m : FPI16m<"fisub", 0xDE, MRM4m, OneArgFPRW>;
// ST(0) = ST(0) - [mem32int]
//def FISUB32m : FPI32m<"fisub", 0xDA, MRM4m, OneArgFPRW>;

// FSUBR reg, mem: Before stackification, these are represented by:
// R1 = FSUBR* R2, [mem]

// Note that the order of operands does not reflect the operation being
// performed.
def FSUBR32m  : FPI<0xD8, MRM5m, OneArgFPRW,  // ST(0) = [mem32real] - ST(0)
                    (ops f32mem:$src, variable_ops),
                    "fsubr{s} $src">;
def FSUBR64m  : FPI<0xDC, MRM5m, OneArgFPRW,  // ST(0) = [mem64real] - ST(0)
                    (ops f64mem:$src, variable_ops),
                    "fsubr{l} $src">;
// ST(0) = [mem16int] - ST(0)
//def FISUBR16m : FPI16m<"fisubr", 0xDE, MRM5m, OneArgFPRW>;
// ST(0) = [mem32int] - ST(0)
//def FISUBR32m : FPI32m<"fisubr", 0xDA, MRM5m, OneArgFPRW>;

// FDIV reg, mem: Before stackification, these are represented by:
// R1 = FDIV* R2, [mem]
def FDIV32m  : FPI<0xD8, MRM6m, OneArgFPRW,    // ST(0) = ST(0) / [mem32real]
                   (ops f32mem:$src, variable_ops),
                   "fdiv{s} $src">;
def FDIV64m  : FPI<0xDC, MRM6m, OneArgFPRW,    // ST(0) = ST(0) / [mem64real]
                   (ops f64mem:$src, variable_ops),
                   "fdiv{l} $src">;
// ST(0) = ST(0) / [mem16int]
//def FIDIV16m : FPI16m<"fidiv", 0xDE, MRM6m, OneArgFPRW>;
// ST(0) = ST(0) / [mem32int]
//def FIDIV32m : FPI32m<"fidiv", 0xDA, MRM6m, OneArgFPRW>;

// FDIVR reg, mem: Before stackification, these are represented by:
// R1 = FDIVR* R2, [mem]
// Note that the order of operands does not reflect the operation being
// performed.
def FDIVR32m  : FPI<0xD8, MRM7m, OneArgFPRW,  // ST(0) = [mem32real] / ST(0)
                    (ops f32mem:$src, variable_ops),
                    "fdivr{s} $src">;
def FDIVR64m  : FPI<0xDC, MRM7m, OneArgFPRW,  // ST(0) = [mem64real] / ST(0)
                    (ops f64mem:$src, variable_ops),
                    "fdivr{l} $src">;
// ST(0) = [mem16int] / ST(0)
//def FIDIVR16m : FPI16m<"fidivr", 0xDE, MRM7m, OneArgFPRW>;
// ST(0) = [mem32int] / ST(0)
//def FIDIVR32m : FPI32m<"fidivr", 0xDA, MRM7m, OneArgFPRW>;


// Floating point cmovs...
let isTwoAddress = 1, Uses = [ST0], Defs = [ST0] in {
  def FCMOVB  : FPI<0xC0, AddRegFrm, CondMovFP,
                    (ops RST:$op, variable_ops),
                    "fcmovb {$op, %ST(0)|%ST(0), $op}">, DA;
  def FCMOVBE : FPI<0xD0, AddRegFrm, CondMovFP,
                    (ops RST:$op, variable_ops),
                    "fcmovbe {$op, %ST(0)|%ST(0), $op}">, DA;
  def FCMOVE  : FPI<0xC8, AddRegFrm, CondMovFP,
                    (ops RST:$op, variable_ops),
                    "fcmove {$op, %ST(0)|%ST(0), $op}">, DA;
  def FCMOVP  : FPI<0xD8, AddRegFrm, CondMovFP,
                    (ops RST:$op, variable_ops),
                    "fcmovu  {$op, %ST(0)|%ST(0), $op}">, DA;
  def FCMOVAE : FPI<0xC0, AddRegFrm, CondMovFP,
                    (ops RST:$op, variable_ops),
                    "fcmovae {$op, %ST(0)|%ST(0), $op}">, DB;
  def FCMOVA  : FPI<0xD0, AddRegFrm, CondMovFP,
                    (ops RST:$op, variable_ops),
                    "fcmova {$op, %ST(0)|%ST(0), $op}">, DB;
  def FCMOVNE : FPI<0xC8, AddRegFrm, CondMovFP,
                    (ops RST:$op, variable_ops),
                    "fcmovne {$op, %ST(0)|%ST(0), $op}">, DB;
  def FCMOVNP : FPI<0xD8, AddRegFrm, CondMovFP,
                    (ops RST:$op, variable_ops),
                    "fcmovnu {$op, %ST(0)|%ST(0), $op}">, DB;
}

// Floating point loads & stores...
// FIXME: these are all marked variable_ops because they have an implicit 
// destination.  Instructions like FILD* that are generated by the instruction
//  selector (not the fp stackifier) need more accurate operand accounting.
def FLDrr   : FPI<0xC0, AddRegFrm, NotFP,
                  (ops RST:$src, variable_ops),
                  "fld $src">, D9;
def FLD32m  : FPI<0xD9, MRM0m, ZeroArgFP,
                  (ops f32mem:$src, variable_ops),
                  "fld{s} $src">;
def FLD64m  : FPI<0xDD, MRM0m, ZeroArgFP,
                  (ops f64mem:$src, variable_ops),
                  "fld{l} $src">;
def FLD80m  : FPI<0xDB, MRM5m, ZeroArgFP,
                  (ops f80mem:$src, variable_ops),
                  "fld{t} $src">;
def FILD16m : FPI<0xDF, MRM0m, ZeroArgFP,
                  (ops i16mem:$src, variable_ops),
                  "fild{s} $src">;
def FILD32m : FPI<0xDB, MRM0m, ZeroArgFP,
                  (ops i32mem:$src, variable_ops),
                  "fild{l} $src">;
def FILD64m : FPI<0xDF, MRM5m, ZeroArgFP,
                  (ops i64mem:$src, variable_ops),
                  "fild{ll} $src">;

def FSTrr    : FPI<0xD0, AddRegFrm, NotFP,
                   (ops RST:$op, variable_ops),
                   "fst $op">, DD;
def FSTPrr   : FPI<0xD8, AddRegFrm, NotFP,
                   (ops RST:$op, variable_ops),
                   "fstp $op">, DD;
def FST32m   : FPI<0xD9, MRM2m, OneArgFP,
                   (ops f32mem:$op, variable_ops),
                   "fst{s} $op">;
def FST64m   : FPI<0xDD, MRM2m, OneArgFP,
                   (ops f64mem:$op, variable_ops),
                   "fst{l} $op">;
def FSTP32m  : FPI<0xD9, MRM3m, OneArgFP,
                   (ops f32mem:$op, variable_ops),
                   "fstp{s} $op">;
def FSTP64m  : FPI<0xDD, MRM3m, OneArgFP,
                   (ops f64mem:$op, variable_ops),
                   "fstp{l} $op">;
def FSTP80m  : FPI<0xDB, MRM7m, OneArgFP,
                   (ops f80mem:$op, variable_ops),
                   "fstp{t} $op">;

def FIST16m  : FPI<0xDF, MRM2m , OneArgFP,
                   (ops i16mem:$op, variable_ops),
                   "fist{s} $op">;
def FIST32m  : FPI<0xDB, MRM2m , OneArgFP,
                   (ops i32mem:$op, variable_ops),
                   "fist{l} $op">;
def FISTP16m : FPI<0xDF, MRM3m , NotFP   ,
                   (ops i16mem:$op, variable_ops),
                   "fistp{s} $op">;
def FISTP32m : FPI<0xDB, MRM3m , NotFP   ,
                   (ops i32mem:$op, variable_ops),
                   "fistp{l} $op">;
def FISTP64m : FPI<0xDF, MRM7m , OneArgFP,
                   (ops i64mem:$op, variable_ops),
                   "fistp{ll} $op">;

def FXCH     : FPI<0xC8, AddRegFrm, NotFP,
                   (ops RST:$op), "fxch $op">, D9;      // fxch ST(i), ST(0)

// Floating point constant loads...
def FLD0 : FPI<0xEE, RawFrm, ZeroArgFP, (ops variable_ops), "fldz">, D9;
def FLD1 : FPI<0xE8, RawFrm, ZeroArgFP, (ops variable_ops), "fld1">, D9;


// Unary operations...
def FCHS  : FPI<0xE0, RawFrm, OneArgFPRW,   // f1 = fchs f2
                (ops variable_ops),
                "fchs">, D9;
def FABS  : FPI<0xE1, RawFrm, OneArgFPRW,   // f1 = fabs f2
                (ops variable_ops),
                "fabs">, D9;
def FSQRT : FPI<0xFA, RawFrm, OneArgFPRW,   // fsqrt ST(0)
                (ops variable_ops),
                "fsqrt">, D9;
def FSIN  : FPI<0xFE, RawFrm, OneArgFPRW,   // fsin  ST(0)
                (ops variable_ops),
                "fsin">, D9;
def FCOS  : FPI<0xFF, RawFrm, OneArgFPRW,   // fcos  ST(0)
                (ops variable_ops),
                "fcos">, D9;
def FTST  : FPI<0xE4, RawFrm, OneArgFP  ,   // ftst ST(0)
                (ops variable_ops),
                "ftst">, D9;

// Binary arithmetic operations...
class FPST0rInst<bits<8> o, dag ops, string asm>
  : I<o, AddRegFrm, ops, asm>, D8 {
  list<Register> Uses = [ST0];
  list<Register> Defs = [ST0];
}
class FPrST0Inst<bits<8> o, dag ops, string asm>
  : I<o, AddRegFrm, ops, asm>, DC {
  list<Register> Uses = [ST0];
}
class FPrST0PInst<bits<8> o, dag ops, string asm>
  : I<o, AddRegFrm, ops, asm>, DE {
  list<Register> Uses = [ST0];
}

def FADDST0r   : FPST0rInst <0xC0, (ops RST:$op),
                             "fadd $op">;
def FADDrST0   : FPrST0Inst <0xC0, (ops RST:$op),
                             "fadd {%ST(0), $op|$op, %ST(0)}">;
def FADDPrST0  : FPrST0PInst<0xC0, (ops RST:$op),
                             "faddp $op">;

// NOTE: GAS and apparently all other AT&T style assemblers have a broken notion
// of some of the 'reverse' forms of the fsub and fdiv instructions.  As such,
// we have to put some 'r's in and take them out of weird places.
def FSUBRST0r  : FPST0rInst <0xE8, (ops RST:$op),
                             "fsubr $op">;
def FSUBrST0   : FPrST0Inst <0xE8, (ops RST:$op),
                             "fsub{r} {%ST(0), $op|$op, %ST(0)}">;
def FSUBPrST0  : FPrST0PInst<0xE8, (ops RST:$op),
                             "fsub{r}p $op">;

def FSUBST0r   : FPST0rInst <0xE0, (ops RST:$op),
                             "fsub $op">;
def FSUBRrST0  : FPrST0Inst <0xE0, (ops RST:$op),
                             "fsub{|r} {%ST(0), $op|$op, %ST(0)}">;
def FSUBRPrST0 : FPrST0PInst<0xE0, (ops RST:$op),
                             "fsub{|r}p $op">;

def FMULST0r   : FPST0rInst <0xC8, (ops RST:$op),
                             "fmul $op">;
def FMULrST0   : FPrST0Inst <0xC8, (ops RST:$op),
                             "fmul {%ST(0), $op|$op, %ST(0)}">;
def FMULPrST0  : FPrST0PInst<0xC8, (ops RST:$op),
                             "fmulp $op">;

def FDIVRST0r  : FPST0rInst <0xF8, (ops RST:$op),
                             "fdivr $op">;
def FDIVrST0   : FPrST0Inst <0xF8, (ops RST:$op),
                             "fdiv{r} {%ST(0), $op|$op, %ST(0)}">;
def FDIVPrST0  : FPrST0PInst<0xF8, (ops RST:$op),
                             "fdiv{r}p $op">;

def FDIVST0r   : FPST0rInst <0xF0, (ops RST:$op),  // ST(0) = ST(0) / ST(i)
                             "fdiv $op">;
def FDIVRrST0  : FPrST0Inst <0xF0, (ops RST:$op),  // ST(i) = ST(0) / ST(i)
                             "fdiv{|r} {%ST(0), $op|$op, %ST(0)}">;
def FDIVRPrST0 : FPrST0PInst<0xF0, (ops RST:$op),  // ST(i) = ST(0) / ST(i), pop
                             "fdiv{|r}p $op">;

// Floating point compares
def FUCOMr    : FPI<0xE0, AddRegFrm, CompareFP,   // FPSW = cmp ST(0) with ST(i)
                    (ops RST:$reg, variable_ops),
                    "fucom $reg">, DD, Imp<[ST0],[]>;
def FUCOMPr   : I<0xE8, AddRegFrm,           // FPSW = cmp ST(0) with ST(i), pop
                  (ops RST:$reg, variable_ops),
                  "fucomp $reg">, DD, Imp<[ST0],[]>;
def FUCOMPPr  : I<0xE9, RawFrm,                // cmp ST(0) with ST(1), pop, pop
                  (ops variable_ops),
                  "fucompp">, DA, Imp<[ST0],[]>;

def FUCOMIr  : FPI<0xE8, AddRegFrm, CompareFP,  // CC = cmp ST(0) with ST(i)
                   (ops RST:$reg, variable_ops),
                   "fucomi {$reg, %ST(0)|%ST(0), $reg}">, DB, Imp<[ST0],[]>;
def FUCOMIPr : I<0xE8, AddRegFrm,              // CC = cmp ST(0) with ST(i), pop
                 (ops RST:$reg, variable_ops),
                 "fucomip {$reg, %ST(0)|%ST(0), $reg}">, DF, Imp<[ST0],[]>;


// Floating point flag ops
def FNSTSW8r  : I<0xE0, RawFrm,                  // AX = fp flags
                  (ops), "fnstsw">, DF, Imp<[],[AX]>;

def FNSTCW16m : I<0xD9, MRM7m,                   // [mem16] = X87 control world
                  (ops i16mem:$dst), "fnstcw $dst">;
def FLDCW16m  : I<0xD9, MRM5m,                   // X87 control world = [mem16]
                  (ops i16mem:$dst), "fldcw $dst">;