X86InstrInfo.td

                      (implicit EFLAGS)]>, OpSize;
  def SUB32mi8 : Ii8<0x83, MRM5m, (outs), (ins i32mem:$dst, i32i8imm :$src2),
                     "sub{l}\t{$src2, $dst|$dst, $src2}",
                     [(store (sub (load addr:$dst), i32immSExt8:$src2),
                             addr:$dst),
                      (implicit EFLAGS)]>;
                      
  def SUB8i8 : Ii8<0x2C, RawFrm, (outs), (ins i8imm:$src),
                   "sub{b}\t{$src, %al|%al, $src}", []>;
  def SUB16i16 : Ii16<0x2D, RawFrm, (outs), (ins i16imm:$src),
                      "sub{w}\t{$src, %ax|%ax, $src}", []>, OpSize;
  def SUB32i32 : Ii32<0x2D, RawFrm, (outs), (ins i32imm:$src),
                      "sub{l}\t{$src, %eax|%eax, $src}", []>;
}

let Uses = [EFLAGS] in {
def SBB8rr     : I<0x18, MRMDestReg, (outs GR8:$dst),
                                     (ins GR8:$src1, GR8:$src2),
                  "sbb{b}\t{$src2, $dst|$dst, $src2}",
                 [(set GR8:$dst, (sube GR8:$src1, GR8:$src2))]>;
def SBB16rr    : I<0x19, MRMDestReg, (outs GR16:$dst),
                                     (ins GR16:$src1, GR16:$src2),
                  "sbb{w}\t{$src2, $dst|$dst, $src2}",
                 [(set GR16:$dst, (sube GR16:$src1, GR16:$src2))]>, OpSize;
def SBB32rr    : I<0x19, MRMDestReg, (outs GR32:$dst),
                                      (ins GR32:$src1, GR32:$src2),
                  "sbb{l}\t{$src2, $dst|$dst, $src2}",
                 [(set GR32:$dst, (sube GR32:$src1, GR32:$src2))]>;

let isTwoAddress = 0 in {
  def SBB8mr   : I<0x18, MRMDestMem, (outs), (ins i8mem:$dst, GR8:$src2), 
                   "sbb{b}\t{$src2, $dst|$dst, $src2}",
                   [(store (sube (load addr:$dst), GR8:$src2), addr:$dst)]>;
  def SBB16mr  : I<0x19, MRMDestMem, (outs), (ins i16mem:$dst, GR16:$src2), 
                   "sbb{w}\t{$src2, $dst|$dst, $src2}",
                   [(store (sube (load addr:$dst), GR16:$src2), addr:$dst)]>,
                   OpSize;
  def SBB32mr  : I<0x19, MRMDestMem, (outs), (ins i32mem:$dst, GR32:$src2), 
                   "sbb{l}\t{$src2, $dst|$dst, $src2}",
                   [(store (sube (load addr:$dst), GR32:$src2), addr:$dst)]>;
  def SBB8mi  : Ii8<0x80, MRM3m, (outs), (ins i8mem:$dst, i8imm:$src2), 
                    "sbb{b}\t{$src2, $dst|$dst, $src2}",
                   [(store (sube (loadi8 addr:$dst), imm:$src2), addr:$dst)]>;
  def SBB16mi  : Ii16<0x81, MRM3m, (outs), (ins i16mem:$dst, i16imm:$src2), 
                      "sbb{w}\t{$src2, $dst|$dst, $src2}",
                  [(store (sube (loadi16 addr:$dst), imm:$src2), addr:$dst)]>,
                  OpSize;
  def SBB16mi8 : Ii8<0x83, MRM3m, (outs), (ins i16mem:$dst, i16i8imm :$src2), 
                     "sbb{w}\t{$src2, $dst|$dst, $src2}",
               [(store (sube (load addr:$dst), i16immSExt8:$src2), addr:$dst)]>,
               OpSize;
  def SBB32mi  : Ii32<0x81, MRM3m, (outs), (ins i32mem:$dst, i32imm:$src2), 
                      "sbb{l}\t{$src2, $dst|$dst, $src2}",
                  [(store (sube (loadi32 addr:$dst), imm:$src2), addr:$dst)]>;
  def SBB32mi8 : Ii8<0x83, MRM3m, (outs), (ins i32mem:$dst, i32i8imm :$src2), 
                     "sbb{l}\t{$src2, $dst|$dst, $src2}",
               [(store (sube (load addr:$dst), i32immSExt8:$src2), addr:$dst)]>;
               
  def SBB8i8 : Ii8<0x1C, RawFrm, (outs), (ins i8imm:$src),
                   "sbb{b}\t{$src, %al|%al, $src}", []>;
  def SBB16i16 : Ii16<0x1D, RawFrm, (outs), (ins i16imm:$src),
                      "sbb{w}\t{$src, %ax|%ax, $src}", []>, OpSize;
  def SBB32i32 : Ii32<0x1D, RawFrm, (outs), (ins i32imm:$src),
                      "sbb{l}\t{$src, %eax|%eax, $src}", []>;
}

def SBB8rr_REV : I<0x1A, MRMSrcReg, (outs GR8:$dst), (ins GR8:$src1, GR8:$src2),
                   "sbb{b}\t{$src2, $dst|$dst, $src2}", []>;
def SBB16rr_REV : I<0x1B, MRMSrcReg, (outs GR16:$dst), 
                    (ins GR16:$src1, GR16:$src2),
                    "sbb{w}\t{$src2, $dst|$dst, $src2}", []>, OpSize;
def SBB32rr_REV : I<0x1B, MRMSrcReg, (outs GR32:$dst), 
                    (ins GR32:$src1, GR32:$src2),
                    "sbb{l}\t{$src2, $dst|$dst, $src2}", []>;

def SBB8rm   : I<0x1A, MRMSrcMem, (outs GR8:$dst), (ins GR8:$src1, i8mem:$src2),
                    "sbb{b}\t{$src2, $dst|$dst, $src2}",
                    [(set GR8:$dst, (sube GR8:$src1, (load addr:$src2)))]>;
def SBB16rm  : I<0x1B, MRMSrcMem, (outs GR16:$dst),
                                  (ins GR16:$src1, i16mem:$src2),
                    "sbb{w}\t{$src2, $dst|$dst, $src2}",
                    [(set GR16:$dst, (sube GR16:$src1, (load addr:$src2)))]>,
                    OpSize;
def SBB32rm  : I<0x1B, MRMSrcMem, (outs GR32:$dst),
                                  (ins GR32:$src1, i32mem:$src2),
                    "sbb{l}\t{$src2, $dst|$dst, $src2}",
                    [(set GR32:$dst, (sube GR32:$src1, (load addr:$src2)))]>;
def SBB8ri   : Ii8<0x80, MRM3r, (outs GR8:$dst), (ins GR8:$src1, i8imm:$src2),
                    "sbb{b}\t{$src2, $dst|$dst, $src2}",
                    [(set GR8:$dst, (sube GR8:$src1, imm:$src2))]>;
def SBB16ri  : Ii16<0x81, MRM3r, (outs GR16:$dst),
                                 (ins GR16:$src1, i16imm:$src2),
                    "sbb{w}\t{$src2, $dst|$dst, $src2}",
                    [(set GR16:$dst, (sube GR16:$src1, imm:$src2))]>, OpSize;
def SBB16ri8 : Ii8<0x83, MRM3r, (outs GR16:$dst),
                                (ins GR16:$src1, i16i8imm:$src2),
                   "sbb{w}\t{$src2, $dst|$dst, $src2}",
                   [(set GR16:$dst, (sube GR16:$src1, i16immSExt8:$src2))]>,
                   OpSize;
def SBB32ri  : Ii32<0x81, MRM3r, (outs GR32:$dst), 
                                 (ins GR32:$src1, i32imm:$src2),
                    "sbb{l}\t{$src2, $dst|$dst, $src2}",
                    [(set GR32:$dst, (sube GR32:$src1, imm:$src2))]>;
def SBB32ri8 : Ii8<0x83, MRM3r, (outs GR32:$dst),
                                (ins GR32:$src1, i32i8imm:$src2),
                   "sbb{l}\t{$src2, $dst|$dst, $src2}",
                   [(set GR32:$dst, (sube GR32:$src1, i32immSExt8:$src2))]>;
} // Uses = [EFLAGS]
} // Defs = [EFLAGS]

let Defs = [EFLAGS] in {
let isCommutable = 1 in {  // X = IMUL Y, Z --> X = IMUL Z, Y
// Register-Register Signed Integer Multiply
def IMUL16rr : I<0xAF, MRMSrcReg, (outs GR16:$dst), (ins GR16:$src1,GR16:$src2),
                 "imul{w}\t{$src2, $dst|$dst, $src2}",
                 [(set GR16:$dst, EFLAGS,
                       (X86smul_flag GR16:$src1, GR16:$src2))]>, TB, OpSize;
def IMUL32rr : I<0xAF, MRMSrcReg, (outs GR32:$dst), (ins GR32:$src1,GR32:$src2),
                 "imul{l}\t{$src2, $dst|$dst, $src2}",
                 [(set GR32:$dst, EFLAGS,
                       (X86smul_flag GR32:$src1, GR32:$src2))]>, TB;
}

// Register-Memory Signed Integer Multiply
def IMUL16rm : I<0xAF, MRMSrcMem, (outs GR16:$dst),
                                  (ins GR16:$src1, i16mem:$src2),
                 "imul{w}\t{$src2, $dst|$dst, $src2}",
                 [(set GR16:$dst, EFLAGS,
                       (X86smul_flag GR16:$src1, (load addr:$src2)))]>,
               TB, OpSize;
def IMUL32rm : I<0xAF, MRMSrcMem, (outs GR32:$dst), 
                 (ins GR32:$src1, i32mem:$src2),
                 "imul{l}\t{$src2, $dst|$dst, $src2}",
                 [(set GR32:$dst, EFLAGS,
                       (X86smul_flag GR32:$src1, (load addr:$src2)))]>, TB;
} // Defs = [EFLAGS]
} // end Two Address instructions

// Suprisingly enough, these are not two address instructions!
let Defs = [EFLAGS] in {
// Register-Integer Signed Integer Multiply
def IMUL16rri  : Ii16<0x69, MRMSrcReg,                      // GR16 = GR16*I16
                      (outs GR16:$dst), (ins GR16:$src1, i16imm:$src2),
                      "imul{w}\t{$src2, $src1, $dst|$dst, $src1, $src2}",
                      [(set GR16:$dst, EFLAGS, 
                            (X86smul_flag GR16:$src1, imm:$src2))]>, OpSize;
def IMUL32rri  : Ii32<0x69, MRMSrcReg,                      // GR32 = GR32*I32
                      (outs GR32:$dst), (ins GR32:$src1, i32imm:$src2),
                      "imul{l}\t{$src2, $src1, $dst|$dst, $src1, $src2}",
                      [(set GR32:$dst, EFLAGS,
                            (X86smul_flag GR32:$src1, imm:$src2))]>;
def IMUL16rri8 : Ii8<0x6B, MRMSrcReg,                       // GR16 = GR16*I8
                     (outs GR16:$dst), (ins GR16:$src1, i16i8imm:$src2),
                     "imul{w}\t{$src2, $src1, $dst|$dst, $src1, $src2}",
                     [(set GR16:$dst, EFLAGS,
                           (X86smul_flag GR16:$src1, i16immSExt8:$src2))]>,
                 OpSize;
def IMUL32rri8 : Ii8<0x6B, MRMSrcReg,                       // GR32 = GR32*I8
                     (outs GR32:$dst), (ins GR32:$src1, i32i8imm:$src2),
                     "imul{l}\t{$src2, $src1, $dst|$dst, $src1, $src2}",
                     [(set GR32:$dst, EFLAGS,
                           (X86smul_flag GR32:$src1, i32immSExt8:$src2))]>;

// Memory-Integer Signed Integer Multiply
def IMUL16rmi  : Ii16<0x69, MRMSrcMem,                     // GR16 = [mem16]*I16
                      (outs GR16:$dst), (ins i16mem:$src1, i16imm:$src2),
                      "imul{w}\t{$src2, $src1, $dst|$dst, $src1, $src2}",
                      [(set GR16:$dst, EFLAGS,
                            (X86smul_flag (load addr:$src1), imm:$src2))]>,
                 OpSize;
def IMUL32rmi  : Ii32<0x69, MRMSrcMem,                     // GR32 = [mem32]*I32
                      (outs GR32:$dst), (ins i32mem:$src1, i32imm:$src2),
                      "imul{l}\t{$src2, $src1, $dst|$dst, $src1, $src2}",
                      [(set GR32:$dst, EFLAGS,
                            (X86smul_flag (load addr:$src1), imm:$src2))]>;
def IMUL16rmi8 : Ii8<0x6B, MRMSrcMem,                       // GR16 = [mem16]*I8
                     (outs GR16:$dst), (ins i16mem:$src1, i16i8imm :$src2),
                     "imul{w}\t{$src2, $src1, $dst|$dst, $src1, $src2}",
                     [(set GR16:$dst, EFLAGS,
                           (X86smul_flag (load addr:$src1),
                                         i16immSExt8:$src2))]>, OpSize;
def IMUL32rmi8 : Ii8<0x6B, MRMSrcMem,                       // GR32 = [mem32]*I8
                     (outs GR32:$dst), (ins i32mem:$src1, i32i8imm: $src2),
                     "imul{l}\t{$src2, $src1, $dst|$dst, $src1, $src2}",
                     [(set GR32:$dst, EFLAGS,
                           (X86smul_flag (load addr:$src1),
                                         i32immSExt8:$src2))]>;
} // Defs = [EFLAGS]

//===----------------------------------------------------------------------===//
// Test instructions are just like AND, except they don't generate a result.
//
let Defs = [EFLAGS] in {
let isCommutable = 1 in {   // TEST X, Y   --> TEST Y, X
def TEST8rr  : I<0x84, MRMSrcReg, (outs),  (ins GR8:$src1, GR8:$src2),
                     "test{b}\t{$src2, $src1|$src1, $src2}",
                     [(set EFLAGS, (X86cmp (and_su GR8:$src1, GR8:$src2), 0))]>;
def TEST16rr : I<0x85, MRMSrcReg, (outs),  (ins GR16:$src1, GR16:$src2),
                     "test{w}\t{$src2, $src1|$src1, $src2}",
                     [(set EFLAGS, (X86cmp (and_su GR16:$src1, GR16:$src2),
                      0))]>,
                 OpSize;
def TEST32rr : I<0x85, MRMSrcReg, (outs),  (ins GR32:$src1, GR32:$src2),
                     "test{l}\t{$src2, $src1|$src1, $src2}",
                     [(set EFLAGS, (X86cmp (and_su GR32:$src1, GR32:$src2),
                      0))]>;
}

def TEST8i8  : Ii8<0xA8, RawFrm, (outs), (ins i8imm:$src),
                   "test{b}\t{$src, %al|%al, $src}", []>;
def TEST16i16 : Ii16<0xA9, RawFrm, (outs), (ins i16imm:$src),
                     "test{w}\t{$src, %ax|%ax, $src}", []>, OpSize;
def TEST32i32 : Ii32<0xA9, RawFrm, (outs), (ins i32imm:$src),
                     "test{l}\t{$src, %eax|%eax, $src}", []>;

def TEST8rm  : I<0x84, MRMSrcMem, (outs),  (ins GR8 :$src1, i8mem :$src2),
                     "test{b}\t{$src2, $src1|$src1, $src2}",
                     [(set EFLAGS, (X86cmp (and GR8:$src1, (loadi8 addr:$src2)),
                       0))]>;
def TEST16rm : I<0x85, MRMSrcMem, (outs),  (ins GR16:$src1, i16mem:$src2),
                     "test{w}\t{$src2, $src1|$src1, $src2}",
                     [(set EFLAGS, (X86cmp (and GR16:$src1,
                                         (loadi16 addr:$src2)), 0))]>, OpSize;
def TEST32rm : I<0x85, MRMSrcMem, (outs),  (ins GR32:$src1, i32mem:$src2),
                     "test{l}\t{$src2, $src1|$src1, $src2}",
                     [(set EFLAGS, (X86cmp (and GR32:$src1,
                                                (loadi32 addr:$src2)), 0))]>;

def TEST8ri  : Ii8 <0xF6, MRM0r,                     // flags = GR8  & imm8
                    (outs),  (ins GR8:$src1, i8imm:$src2),
                    "test{b}\t{$src2, $src1|$src1, $src2}",
                    [(set EFLAGS, (X86cmp (and_su GR8:$src1, imm:$src2), 0))]>;
def TEST16ri : Ii16<0xF7, MRM0r,                     // flags = GR16 & imm16
                    (outs),  (ins GR16:$src1, i16imm:$src2),
                    "test{w}\t{$src2, $src1|$src1, $src2}",
                    [(set EFLAGS, (X86cmp (and_su GR16:$src1, imm:$src2), 0))]>,
                    OpSize;
def TEST32ri : Ii32<0xF7, MRM0r,                     // flags = GR32 & imm32
                    (outs),  (ins GR32:$src1, i32imm:$src2),
                    "test{l}\t{$src2, $src1|$src1, $src2}",
                    [(set EFLAGS, (X86cmp (and_su GR32:$src1, imm:$src2), 0))]>;

def TEST8mi  : Ii8 <0xF6, MRM0m,                   // flags = [mem8]  & imm8
                    (outs), (ins i8mem:$src1, i8imm:$src2),
                    "test{b}\t{$src2, $src1|$src1, $src2}",
                    [(set EFLAGS, (X86cmp (and (loadi8 addr:$src1), imm:$src2),
                     0))]>;
def TEST16mi : Ii16<0xF7, MRM0m,                   // flags = [mem16] & imm16
                    (outs), (ins i16mem:$src1, i16imm:$src2),
                    "test{w}\t{$src2, $src1|$src1, $src2}",
                    [(set EFLAGS, (X86cmp (and (loadi16 addr:$src1), imm:$src2),
                     0))]>, OpSize;
def TEST32mi : Ii32<0xF7, MRM0m,                   // flags = [mem32] & imm32
                    (outs), (ins i32mem:$src1, i32imm:$src2),
                    "test{l}\t{$src2, $src1|$src1, $src2}",
                    [(set EFLAGS, (X86cmp (and (loadi32 addr:$src1), imm:$src2),
                     0))]>;
} // Defs = [EFLAGS]


// Condition code ops, incl. set if equal/not equal/...
let Defs = [EFLAGS], Uses = [AH], neverHasSideEffects = 1 in
def SAHF     : I<0x9E, RawFrm, (outs),  (ins), "sahf", []>;  // flags = AH
let Defs = [AH], Uses = [EFLAGS], neverHasSideEffects = 1 in
def LAHF     : I<0x9F, RawFrm, (outs),  (ins), "lahf", []>;  // AH = flags

let Uses = [EFLAGS] in {
// Use sbb to materialize carry bit.
let Defs = [EFLAGS], isCodeGenOnly = 1 in {
// FIXME: These are pseudo ops that should be replaced with Pat<> patterns.
// However, Pat<> can't replicate the destination reg into the inputs of the
// result.
// FIXME: Change these to have encoding Pseudo when X86MCCodeEmitter replaces
// X86CodeEmitter.
def SETB_C8r : I<0x18, MRMInitReg, (outs GR8:$dst), (ins), "",
                 [(set GR8:$dst, (X86setcc_c X86_COND_B, EFLAGS))]>;
def SETB_C16r : I<0x19, MRMInitReg, (outs GR16:$dst), (ins), "",
                 [(set GR16:$dst, (X86setcc_c X86_COND_B, EFLAGS))]>,
                OpSize;
def SETB_C32r : I<0x19, MRMInitReg, (outs GR32:$dst), (ins), "",
                 [(set GR32:$dst, (X86setcc_c X86_COND_B, EFLAGS))]>;
} // isCodeGenOnly

def SETEr    : I<0x94, MRM0r, 
                 (outs GR8   :$dst), (ins),
                 "sete\t$dst",
                 [(set GR8:$dst, (X86setcc X86_COND_E, EFLAGS))]>,
               TB;                        // GR8 = ==
def SETEm    : I<0x94, MRM0m, 
                 (outs), (ins i8mem:$dst),
                 "sete\t$dst",
                 [(store (X86setcc X86_COND_E, EFLAGS), addr:$dst)]>,
               TB;                        // [mem8] = ==

def SETNEr   : I<0x95, MRM0r, 
                 (outs GR8   :$dst), (ins),
                 "setne\t$dst",
                 [(set GR8:$dst, (X86setcc X86_COND_NE, EFLAGS))]>,
               TB;                        // GR8 = !=
def SETNEm   : I<0x95, MRM0m, 
                 (outs), (ins i8mem:$dst),
                 "setne\t$dst",
                 [(store (X86setcc X86_COND_NE, EFLAGS), addr:$dst)]>,
               TB;                        // [mem8] = !=

def SETLr    : I<0x9C, MRM0r, 
                 (outs GR8   :$dst), (ins),
                 "setl\t$dst",
                 [(set GR8:$dst, (X86setcc X86_COND_L, EFLAGS))]>,
               TB;                        // GR8 = <  signed
def SETLm    : I<0x9C, MRM0m, 
                 (outs), (ins i8mem:$dst),
                 "setl\t$dst",
                 [(store (X86setcc X86_COND_L, EFLAGS), addr:$dst)]>,
               TB;                        // [mem8] = <  signed

def SETGEr   : I<0x9D, MRM0r, 
                 (outs GR8   :$dst), (ins),
                 "setge\t$dst",
                 [(set GR8:$dst, (X86setcc X86_COND_GE, EFLAGS))]>,
               TB;                        // GR8 = >= signed
def SETGEm   : I<0x9D, MRM0m, 
                 (outs), (ins i8mem:$dst),
                 "setge\t$dst",
                 [(store (X86setcc X86_COND_GE, EFLAGS), addr:$dst)]>,
               TB;                        // [mem8] = >= signed

def SETLEr   : I<0x9E, MRM0r, 
                 (outs GR8   :$dst), (ins),
                 "setle\t$dst",
                 [(set GR8:$dst, (X86setcc X86_COND_LE, EFLAGS))]>,
               TB;                        // GR8 = <= signed
def SETLEm   : I<0x9E, MRM0m, 
                 (outs), (ins i8mem:$dst),
                 "setle\t$dst",
                 [(store (X86setcc X86_COND_LE, EFLAGS), addr:$dst)]>,
               TB;                        // [mem8] = <= signed

def SETGr    : I<0x9F, MRM0r, 
                 (outs GR8   :$dst), (ins),
                 "setg\t$dst",
                 [(set GR8:$dst, (X86setcc X86_COND_G, EFLAGS))]>,
               TB;                        // GR8 = >  signed
def SETGm    : I<0x9F, MRM0m, 
                 (outs), (ins i8mem:$dst),
                 "setg\t$dst",
                 [(store (X86setcc X86_COND_G, EFLAGS), addr:$dst)]>,
               TB;                        // [mem8] = >  signed

def SETBr    : I<0x92, MRM0r,
                 (outs GR8   :$dst), (ins),
                 "setb\t$dst",
                 [(set GR8:$dst, (X86setcc X86_COND_B, EFLAGS))]>,
               TB;                        // GR8 = <  unsign
def SETBm    : I<0x92, MRM0m,
                 (outs), (ins i8mem:$dst),
                 "setb\t$dst",
                 [(store (X86setcc X86_COND_B, EFLAGS), addr:$dst)]>,
               TB;                        // [mem8] = <  unsign

def SETAEr   : I<0x93, MRM0r, 
                 (outs GR8   :$dst), (ins),
                 "setae\t$dst",
                 [(set GR8:$dst, (X86setcc X86_COND_AE, EFLAGS))]>,
               TB;                        // GR8 = >= unsign
def SETAEm   : I<0x93, MRM0m, 
                 (outs), (ins i8mem:$dst),
                 "setae\t$dst",
                 [(store (X86setcc X86_COND_AE, EFLAGS), addr:$dst)]>,
               TB;                        // [mem8] = >= unsign

def SETBEr   : I<0x96, MRM0r, 
                 (outs GR8   :$dst), (ins),
                 "setbe\t$dst",
                 [(set GR8:$dst, (X86setcc X86_COND_BE, EFLAGS))]>,
               TB;                        // GR8 = <= unsign
def SETBEm   : I<0x96, MRM0m, 
                 (outs), (ins i8mem:$dst),
                 "setbe\t$dst",
                 [(store (X86setcc X86_COND_BE, EFLAGS), addr:$dst)]>,
               TB;                        // [mem8] = <= unsign

def SETAr    : I<0x97, MRM0r, 
                 (outs GR8   :$dst), (ins),
                 "seta\t$dst",
                 [(set GR8:$dst, (X86setcc X86_COND_A, EFLAGS))]>,
               TB;                        // GR8 = >  signed
def SETAm    : I<0x97, MRM0m, 
                 (outs), (ins i8mem:$dst),
                 "seta\t$dst",
                 [(store (X86setcc X86_COND_A, EFLAGS), addr:$dst)]>,
               TB;                        // [mem8] = >  signed

def SETSr    : I<0x98, MRM0r, 
                 (outs GR8   :$dst), (ins),
                 "sets\t$dst",
                 [(set GR8:$dst, (X86setcc X86_COND_S, EFLAGS))]>,
               TB;                        // GR8 = <sign bit>
def SETSm    : I<0x98, MRM0m, 
                 (outs), (ins i8mem:$dst),
                 "sets\t$dst",
                 [(store (X86setcc X86_COND_S, EFLAGS), addr:$dst)]>,
               TB;                        // [mem8] = <sign bit>
def SETNSr   : I<0x99, MRM0r, 
                 (outs GR8   :$dst), (ins),
                 "setns\t$dst",
                 [(set GR8:$dst, (X86setcc X86_COND_NS, EFLAGS))]>,
               TB;                        // GR8 = !<sign bit>
def SETNSm   : I<0x99, MRM0m, 
                 (outs), (ins i8mem:$dst),
                 "setns\t$dst",
                 [(store (X86setcc X86_COND_NS, EFLAGS), addr:$dst)]>,
               TB;                        // [mem8] = !<sign bit>

def SETPr    : I<0x9A, MRM0r, 
                 (outs GR8   :$dst), (ins),
                 "setp\t$dst",
                 [(set GR8:$dst, (X86setcc X86_COND_P, EFLAGS))]>,
               TB;                        // GR8 = parity
def SETPm    : I<0x9A, MRM0m, 
                 (outs), (ins i8mem:$dst),
                 "setp\t$dst",
                 [(store (X86setcc X86_COND_P, EFLAGS), addr:$dst)]>,
               TB;                        // [mem8] = parity
def SETNPr   : I<0x9B, MRM0r, 
                 (outs GR8   :$dst), (ins),
                 "setnp\t$dst",
                 [(set GR8:$dst, (X86setcc X86_COND_NP, EFLAGS))]>,
               TB;                        // GR8 = not parity
def SETNPm   : I<0x9B, MRM0m, 
                 (outs), (ins i8mem:$dst),
                 "setnp\t$dst",
                 [(store (X86setcc X86_COND_NP, EFLAGS), addr:$dst)]>,
               TB;                        // [mem8] = not parity

def SETOr    : I<0x90, MRM0r, 
                 (outs GR8   :$dst), (ins),
                 "seto\t$dst",
                 [(set GR8:$dst, (X86setcc X86_COND_O, EFLAGS))]>,
               TB;                        // GR8 = overflow
def SETOm    : I<0x90, MRM0m, 
                 (outs), (ins i8mem:$dst),
                 "seto\t$dst",
                 [(store (X86setcc X86_COND_O, EFLAGS), addr:$dst)]>,
               TB;                        // [mem8] = overflow
def SETNOr   : I<0x91, MRM0r, 
                 (outs GR8   :$dst), (ins),
                 "setno\t$dst",
                 [(set GR8:$dst, (X86setcc X86_COND_NO, EFLAGS))]>,
               TB;                        // GR8 = not overflow
def SETNOm   : I<0x91, MRM0m, 
                 (outs), (ins i8mem:$dst),
                 "setno\t$dst",
                 [(store (X86setcc X86_COND_NO, EFLAGS), addr:$dst)]>,
               TB;                        // [mem8] = not overflow
} // Uses = [EFLAGS]


// Integer comparisons
let Defs = [EFLAGS] in {
def CMP8i8 : Ii8<0x3C, RawFrm, (outs), (ins i8imm:$src),
                 "cmp{b}\t{$src, %al|%al, $src}", []>;
def CMP16i16 : Ii16<0x3D, RawFrm, (outs), (ins i16imm:$src),
                    "cmp{w}\t{$src, %ax|%ax, $src}", []>, OpSize;
def CMP32i32 : Ii32<0x3D, RawFrm, (outs), (ins i32imm:$src),
                    "cmp{l}\t{$src, %eax|%eax, $src}", []>;

def CMP8rr  : I<0x38, MRMDestReg,
                (outs), (ins GR8 :$src1, GR8 :$src2),
                "cmp{b}\t{$src2, $src1|$src1, $src2}",
                [(set EFLAGS, (X86cmp GR8:$src1, GR8:$src2))]>;
def CMP16rr : I<0x39, MRMDestReg,
                (outs), (ins GR16:$src1, GR16:$src2),
                "cmp{w}\t{$src2, $src1|$src1, $src2}",
                [(set EFLAGS, (X86cmp GR16:$src1, GR16:$src2))]>, OpSize;
def CMP32rr : I<0x39, MRMDestReg,
                (outs), (ins GR32:$src1, GR32:$src2),
                "cmp{l}\t{$src2, $src1|$src1, $src2}",
                [(set EFLAGS, (X86cmp GR32:$src1, GR32:$src2))]>;
def CMP8mr  : I<0x38, MRMDestMem,
                (outs), (ins i8mem :$src1, GR8 :$src2),
                "cmp{b}\t{$src2, $src1|$src1, $src2}",
                [(set EFLAGS, (X86cmp (loadi8 addr:$src1), GR8:$src2))]>;
def CMP16mr : I<0x39, MRMDestMem,
                (outs), (ins i16mem:$src1, GR16:$src2),
                "cmp{w}\t{$src2, $src1|$src1, $src2}",
                [(set EFLAGS, (X86cmp (loadi16 addr:$src1), GR16:$src2))]>,
                 OpSize;
def CMP32mr : I<0x39, MRMDestMem,
                (outs), (ins i32mem:$src1, GR32:$src2),
                "cmp{l}\t{$src2, $src1|$src1, $src2}",
                [(set EFLAGS, (X86cmp (loadi32 addr:$src1), GR32:$src2))]>;
def CMP8rm  : I<0x3A, MRMSrcMem,
                (outs), (ins GR8 :$src1, i8mem :$src2),
                "cmp{b}\t{$src2, $src1|$src1, $src2}",
                [(set EFLAGS, (X86cmp GR8:$src1, (loadi8 addr:$src2)))]>;
def CMP16rm : I<0x3B, MRMSrcMem,
                (outs), (ins GR16:$src1, i16mem:$src2),
                "cmp{w}\t{$src2, $src1|$src1, $src2}",
                [(set EFLAGS, (X86cmp GR16:$src1, (loadi16 addr:$src2)))]>,
                 OpSize;
def CMP32rm : I<0x3B, MRMSrcMem,
                (outs), (ins GR32:$src1, i32mem:$src2),
                "cmp{l}\t{$src2, $src1|$src1, $src2}",
                [(set EFLAGS, (X86cmp GR32:$src1, (loadi32 addr:$src2)))]>;

// These are alternate spellings for use by the disassembler, we mark them as
// code gen only to ensure they aren't matched by the assembler.
let isCodeGenOnly = 1 in {
  def CMP8rr_alt : I<0x3A, MRMSrcReg, (outs), (ins GR8:$src1, GR8:$src2),
                    "cmp{b}\t{$src2, $src1|$src1, $src2}", []>;
  def CMP16rr_alt : I<0x3B, MRMSrcReg, (outs), (ins GR16:$src1, GR16:$src2),
                     "cmp{w}\t{$src2, $src1|$src1, $src2}", []>, OpSize;
  def CMP32rr_alt : I<0x3B, MRMSrcReg, (outs), (ins GR32:$src1, GR32:$src2),
                     "cmp{l}\t{$src2, $src1|$src1, $src2}", []>;
}

def CMP8ri  : Ii8<0x80, MRM7r,
                  (outs), (ins GR8:$src1, i8imm:$src2),
                  "cmp{b}\t{$src2, $src1|$src1, $src2}",
                  [(set EFLAGS, (X86cmp GR8:$src1, imm:$src2))]>;
def CMP16ri : Ii16<0x81, MRM7r,
                   (outs), (ins GR16:$src1, i16imm:$src2),
                   "cmp{w}\t{$src2, $src1|$src1, $src2}",
                   [(set EFLAGS, (X86cmp GR16:$src1, imm:$src2))]>, OpSize;
def CMP32ri : Ii32<0x81, MRM7r,
                   (outs), (ins GR32:$src1, i32imm:$src2),
                   "cmp{l}\t{$src2, $src1|$src1, $src2}",
                   [(set EFLAGS, (X86cmp GR32:$src1, imm:$src2))]>;
def CMP8mi  : Ii8 <0x80, MRM7m,
                   (outs), (ins i8mem :$src1, i8imm :$src2),
                   "cmp{b}\t{$src2, $src1|$src1, $src2}",
                   [(set EFLAGS, (X86cmp (loadi8 addr:$src1), imm:$src2))]>;
def CMP16mi : Ii16<0x81, MRM7m,
                   (outs), (ins i16mem:$src1, i16imm:$src2),
                   "cmp{w}\t{$src2, $src1|$src1, $src2}",
                   [(set EFLAGS, (X86cmp (loadi16 addr:$src1), imm:$src2))]>,
                   OpSize;
def CMP32mi : Ii32<0x81, MRM7m,
                   (outs), (ins i32mem:$src1, i32imm:$src2),
                   "cmp{l}\t{$src2, $src1|$src1, $src2}",
                   [(set EFLAGS, (X86cmp (loadi32 addr:$src1), imm:$src2))]>;
def CMP16ri8 : Ii8<0x83, MRM7r,
                   (outs), (ins GR16:$src1, i16i8imm:$src2),
                   "cmp{w}\t{$src2, $src1|$src1, $src2}",
                   [(set EFLAGS, (X86cmp GR16:$src1, i16immSExt8:$src2))]>,
                    OpSize;
def CMP16mi8 : Ii8<0x83, MRM7m,
                   (outs), (ins i16mem:$src1, i16i8imm:$src2),
                   "cmp{w}\t{$src2, $src1|$src1, $src2}",
                   [(set EFLAGS, (X86cmp (loadi16 addr:$src1),
                                         i16immSExt8:$src2))]>, OpSize;
def CMP32mi8 : Ii8<0x83, MRM7m,
                   (outs), (ins i32mem:$src1, i32i8imm:$src2),
                   "cmp{l}\t{$src2, $src1|$src1, $src2}",
                   [(set EFLAGS, (X86cmp (loadi32 addr:$src1),
                                         i32immSExt8:$src2))]>;
def CMP32ri8 : Ii8<0x83, MRM7r,
                   (outs), (ins GR32:$src1, i32i8imm:$src2),
                   "cmp{l}\t{$src2, $src1|$src1, $src2}",
                   [(set EFLAGS, (X86cmp GR32:$src1, i32immSExt8:$src2))]>;
} // Defs = [EFLAGS]

// Bit tests.
// TODO: BTC, BTR, and BTS
let Defs = [EFLAGS] in {
def BT16rr : I<0xA3, MRMDestReg, (outs), (ins GR16:$src1, GR16:$src2),
               "bt{w}\t{$src2, $src1|$src1, $src2}",
               [(set EFLAGS, (X86bt GR16:$src1, GR16:$src2))]>, OpSize, TB;
def BT32rr : I<0xA3, MRMDestReg, (outs), (ins GR32:$src1, GR32:$src2),
               "bt{l}\t{$src2, $src1|$src1, $src2}",
               [(set EFLAGS, (X86bt GR32:$src1, GR32:$src2))]>, TB;

// Unlike with the register+register form, the memory+register form of the
// bt instruction does not ignore the high bits of the index. From ISel's
// perspective, this is pretty bizarre. Make these instructions disassembly
// only for now.

def BT16mr : I<0xA3, MRMDestMem, (outs), (ins i16mem:$src1, GR16:$src2),
               "bt{w}\t{$src2, $src1|$src1, $src2}", 
//               [(X86bt (loadi16 addr:$src1), GR16:$src2),
//                (implicit EFLAGS)]
               []
               >, OpSize, TB, Requires<[FastBTMem]>;
def BT32mr : I<0xA3, MRMDestMem, (outs), (ins i32mem:$src1, GR32:$src2),
               "bt{l}\t{$src2, $src1|$src1, $src2}", 
//               [(X86bt (loadi32 addr:$src1), GR32:$src2),
//                (implicit EFLAGS)]
               []
               >, TB, Requires<[FastBTMem]>;

def BT16ri8 : Ii8<0xBA, MRM4r, (outs), (ins GR16:$src1, i16i8imm:$src2),
                "bt{w}\t{$src2, $src1|$src1, $src2}",
                [(set EFLAGS, (X86bt GR16:$src1, i16immSExt8:$src2))]>,
                OpSize, TB;
def BT32ri8 : Ii8<0xBA, MRM4r, (outs), (ins GR32:$src1, i32i8imm:$src2),
                "bt{l}\t{$src2, $src1|$src1, $src2}",
                [(set EFLAGS, (X86bt GR32:$src1, i32immSExt8:$src2))]>, TB;
// Note that these instructions don't need FastBTMem because that
// only applies when the other operand is in a register. When it's
// an immediate, bt is still fast.
def BT16mi8 : Ii8<0xBA, MRM4m, (outs), (ins i16mem:$src1, i16i8imm:$src2),
                "bt{w}\t{$src2, $src1|$src1, $src2}",
                [(set EFLAGS, (X86bt (loadi16 addr:$src1), i16immSExt8:$src2))
                 ]>, OpSize, TB;
def BT32mi8 : Ii8<0xBA, MRM4m, (outs), (ins i32mem:$src1, i32i8imm:$src2),
                "bt{l}\t{$src2, $src1|$src1, $src2}",
                [(set EFLAGS, (X86bt (loadi32 addr:$src1), i32immSExt8:$src2))
                 ]>, TB;

def BTC16rr : I<0xBB, MRMDestReg, (outs), (ins GR16:$src1, GR16:$src2),
                "btc{w}\t{$src2, $src1|$src1, $src2}", []>, OpSize, TB;
def BTC32rr : I<0xBB, MRMDestReg, (outs), (ins GR32:$src1, GR32:$src2),
                "btc{l}\t{$src2, $src1|$src1, $src2}", []>, TB;
def BTC16mr : I<0xBB, MRMDestMem, (outs), (ins i16mem:$src1, GR16:$src2),
                "btc{w}\t{$src2, $src1|$src1, $src2}", []>, OpSize, TB;
def BTC32mr : I<0xBB, MRMDestMem, (outs), (ins i32mem:$src1, GR32:$src2),
                "btc{l}\t{$src2, $src1|$src1, $src2}", []>, TB;
def BTC16ri8 : Ii8<0xBA, MRM7r, (outs), (ins GR16:$src1, i16i8imm:$src2),
                    "btc{w}\t{$src2, $src1|$src1, $src2}", []>, OpSize, TB;
def BTC32ri8 : Ii8<0xBA, MRM7r, (outs), (ins GR32:$src1, i32i8imm:$src2),
                    "btc{l}\t{$src2, $src1|$src1, $src2}", []>, TB;
def BTC16mi8 : Ii8<0xBA, MRM7m, (outs), (ins i16mem:$src1, i16i8imm:$src2),
                    "btc{w}\t{$src2, $src1|$src1, $src2}", []>, OpSize, TB;
def BTC32mi8 : Ii8<0xBA, MRM7m, (outs), (ins i32mem:$src1, i32i8imm:$src2),
                    "btc{l}\t{$src2, $src1|$src1, $src2}", []>, TB;

def BTR16rr : I<0xB3, MRMDestReg, (outs), (ins GR16:$src1, GR16:$src2),
                "btr{w}\t{$src2, $src1|$src1, $src2}", []>, OpSize, TB;
def BTR32rr : I<0xB3, MRMDestReg, (outs), (ins GR32:$src1, GR32:$src2),
                "btr{l}\t{$src2, $src1|$src1, $src2}", []>, TB;
def BTR16mr : I<0xB3, MRMDestMem, (outs), (ins i16mem:$src1, GR16:$src2),
                "btr{w}\t{$src2, $src1|$src1, $src2}", []>, OpSize, TB;
def BTR32mr : I<0xB3, MRMDestMem, (outs), (ins i32mem:$src1, GR32:$src2),
                "btr{l}\t{$src2, $src1|$src1, $src2}", []>, TB;
def BTR16ri8 : Ii8<0xBA, MRM6r, (outs), (ins GR16:$src1, i16i8imm:$src2),
                    "btr{w}\t{$src2, $src1|$src1, $src2}", []>, OpSize, TB;
def BTR32ri8 : Ii8<0xBA, MRM6r, (outs), (ins GR32:$src1, i32i8imm:$src2),
                    "btr{l}\t{$src2, $src1|$src1, $src2}", []>, TB;
def BTR16mi8 : Ii8<0xBA, MRM6m, (outs), (ins i16mem:$src1, i16i8imm:$src2),
                    "btr{w}\t{$src2, $src1|$src1, $src2}", []>, OpSize, TB;
def BTR32mi8 : Ii8<0xBA, MRM6m, (outs), (ins i32mem:$src1, i32i8imm:$src2),
                    "btr{l}\t{$src2, $src1|$src1, $src2}", []>, TB;

def BTS16rr : I<0xAB, MRMDestReg, (outs), (ins GR16:$src1, GR16:$src2),
                "bts{w}\t{$src2, $src1|$src1, $src2}", []>, OpSize, TB;
def BTS32rr : I<0xAB, MRMDestReg, (outs), (ins GR32:$src1, GR32:$src2),
                "bts{l}\t{$src2, $src1|$src1, $src2}", []>, TB;
def BTS16mr : I<0xAB, MRMDestMem, (outs), (ins i16mem:$src1, GR16:$src2),
                "bts{w}\t{$src2, $src1|$src1, $src2}", []>, OpSize, TB;
def BTS32mr : I<0xAB, MRMDestMem, (outs), (ins i32mem:$src1, GR32:$src2),
                "bts{l}\t{$src2, $src1|$src1, $src2}", []>, TB;
def BTS16ri8 : Ii8<0xBA, MRM5r, (outs), (ins GR16:$src1, i16i8imm:$src2),
                    "bts{w}\t{$src2, $src1|$src1, $src2}", []>, OpSize, TB;
def BTS32ri8 : Ii8<0xBA, MRM5r, (outs), (ins GR32:$src1, i32i8imm:$src2),
                    "bts{l}\t{$src2, $src1|$src1, $src2}", []>, TB;
def BTS16mi8 : Ii8<0xBA, MRM5m, (outs), (ins i16mem:$src1, i16i8imm:$src2),
                    "bts{w}\t{$src2, $src1|$src1, $src2}", []>, OpSize, TB;
def BTS32mi8 : Ii8<0xBA, MRM5m, (outs), (ins i32mem:$src1, i32i8imm:$src2),
                    "bts{l}\t{$src2, $src1|$src1, $src2}", []>, TB;
} // Defs = [EFLAGS]

// Sign/Zero extenders
// Use movsbl intead of movsbw; we don't care about the high 16 bits
// of the register here. This has a smaller encoding and avoids a
// partial-register update.  Actual movsbw included for the disassembler.
def MOVSX16rr8W : I<0xBE, MRMSrcReg, (outs GR16:$dst), (ins GR8:$src),
                    "movs{bw|x}\t{$src, $dst|$dst, $src}", []>, TB, OpSize;
def MOVSX16rm8W : I<0xBE, MRMSrcMem, (outs GR16:$dst), (ins i8mem:$src),
                    "movs{bw|x}\t{$src, $dst|$dst, $src}", []>, TB, OpSize;
def MOVSX16rr8 : I<0xBE, MRMSrcReg, (outs GR16:$dst), (ins GR8 :$src),
                   "", [(set GR16:$dst, (sext GR8:$src))]>, TB;
def MOVSX16rm8 : I<0xBE, MRMSrcMem, (outs GR16:$dst), (ins i8mem :$src),
                   "", [(set GR16:$dst, (sextloadi16i8 addr:$src))]>, TB;
def MOVSX32rr8 : I<0xBE, MRMSrcReg, (outs GR32:$dst), (ins GR8 :$src),
                   "movs{bl|x}\t{$src, $dst|$dst, $src}",
                   [(set GR32:$dst, (sext GR8:$src))]>, TB;
def MOVSX32rm8 : I<0xBE, MRMSrcMem, (outs GR32:$dst), (ins i8mem :$src),
                   "movs{bl|x}\t{$src, $dst|$dst, $src}",
                   [(set GR32:$dst, (sextloadi32i8 addr:$src))]>, TB;
def MOVSX32rr16: I<0xBF, MRMSrcReg, (outs GR32:$dst), (ins GR16:$src),
                   "movs{wl|x}\t{$src, $dst|$dst, $src}",
                   [(set GR32:$dst, (sext GR16:$src))]>, TB;
def MOVSX32rm16: I<0xBF, MRMSrcMem, (outs GR32:$dst), (ins i16mem:$src),
                   "movs{wl|x}\t{$src, $dst|$dst, $src}",
                   [(set GR32:$dst, (sextloadi32i16 addr:$src))]>, TB;

// Use movzbl intead of movzbw; we don't care about the high 16 bits
// of the register here. This has a smaller encoding and avoids a
// partial-register update.  Actual movzbw included for the disassembler.
def MOVZX16rr8W : I<0xB6, MRMSrcReg, (outs GR16:$dst), (ins GR8:$src),
                    "movz{bw|x}\t{$src, $dst|$dst, $src}", []>, TB, OpSize;
def MOVZX16rm8W : I<0xB6, MRMSrcMem, (outs GR16:$dst), (ins i8mem:$src),
                    "movz{bw|x}\t{$src, $dst|$dst, $src}", []>, TB, OpSize;  
def MOVZX16rr8 : I<0xB6, MRMSrcReg, (outs GR16:$dst), (ins GR8 :$src),
                   "", [(set GR16:$dst, (zext GR8:$src))]>, TB;
def MOVZX16rm8 : I<0xB6, MRMSrcMem, (outs GR16:$dst), (ins i8mem :$src),
                   "", [(set GR16:$dst, (zextloadi16i8 addr:$src))]>, TB;
def MOVZX32rr8 : I<0xB6, MRMSrcReg, (outs GR32:$dst), (ins GR8 :$src),
                   "movz{bl|x}\t{$src, $dst|$dst, $src}",
                   [(set GR32:$dst, (zext GR8:$src))]>, TB;
def MOVZX32rm8 : I<0xB6, MRMSrcMem, (outs GR32:$dst), (ins i8mem :$src),
                   "movz{bl|x}\t{$src, $dst|$dst, $src}",
                   [(set GR32:$dst, (zextloadi32i8 addr:$src))]>, TB;
def MOVZX32rr16: I<0xB7, MRMSrcReg, (outs GR32:$dst), (ins GR16:$src),
                   "movz{wl|x}\t{$src, $dst|$dst, $src}",
                   [(set GR32:$dst, (zext GR16:$src))]>, TB;
def MOVZX32rm16: I<0xB7, MRMSrcMem, (outs GR32:$dst), (ins i16mem:$src),
                   "movz{wl|x}\t{$src, $dst|$dst, $src}",
                   [(set GR32:$dst, (zextloadi32i16 addr:$src))]>, TB;

// These are the same as the regular MOVZX32rr8 and MOVZX32rm8
// except that they use GR32_NOREX for the output operand register class
// instead of GR32. This allows them to operate on h registers on x86-64.
def MOVZX32_NOREXrr8 : I<0xB6, MRMSrcReg,
                         (outs GR32_NOREX:$dst), (ins GR8:$src),
                         "movz{bl|x}\t{$src, $dst|$dst, $src}  # NOREX",
                         []>, TB;
let mayLoad = 1 in
def MOVZX32_NOREXrm8 : I<0xB6, MRMSrcMem,
                         (outs GR32_NOREX:$dst), (ins i8mem:$src),
                         "movz{bl|x}\t{$src, $dst|$dst, $src}  # NOREX",
                         []>, TB;

let neverHasSideEffects = 1 in {
  let Defs = [AX], Uses = [AL] in
  def CBW : I<0x98, RawFrm, (outs), (ins),
              "{cbtw|cbw}", []>, OpSize;   // AX = signext(AL)
  let Defs = [EAX], Uses = [AX] in
  def CWDE : I<0x98, RawFrm, (outs), (ins),
              "{cwtl|cwde}", []>;   // EAX = signext(AX)

  let Defs = [AX,DX], Uses = [AX] in
  def CWD : I<0x99, RawFrm, (outs), (ins),
              "{cwtd|cwd}", []>, OpSize; // DX:AX = signext(AX)
  let Defs = [EAX,EDX], Uses = [EAX] in
  def CDQ : I<0x99, RawFrm, (outs), (ins),
              "{cltd|cdq}", []>; // EDX:EAX = signext(EAX)
}

//===----------------------------------------------------------------------===//
// Alias Instructions
//===----------------------------------------------------------------------===//

// Alias instructions that map movr0 to xor.
// FIXME: remove when we can teach regalloc that xor reg, reg is ok.
// FIXME: Set encoding to pseudo.
let Defs = [EFLAGS], isReMaterializable = 1, isAsCheapAsAMove = 1,
    isCodeGenOnly = 1 in {
def MOV8r0   : I<0x30, MRMInitReg, (outs GR8 :$dst), (ins), "",
                 [(set GR8:$dst, 0)]>;

// We want to rewrite MOV16r0 in terms of MOV32r0, because it's a smaller
// encoding and avoids a partial-register update sometimes, but doing so
// at isel time interferes with rematerialization in the current register
// allocator. For now, this is rewritten when the instruction is lowered
// to an MCInst.
def MOV16r0   : I<0x31, MRMInitReg, (outs GR16:$dst), (ins),
                 "",
                 [(set GR16:$dst, 0)]>, OpSize;
                 
// FIXME: Set encoding to pseudo.
def MOV32r0  : I<0x31, MRMInitReg, (outs GR32:$dst), (ins), "",
                 [(set GR32:$dst, 0)]>;
}

//===----------------------------------------------------------------------===//
// Thread Local Storage Instructions
//

// All calls clobber the non-callee saved registers. ESP is marked as
// a use to prevent stack-pointer assignments that appear immediately
// before calls from potentially appearing dead.
let Defs = [EAX, ECX, EDX, FP0, FP1, FP2, FP3, FP4, FP5, FP6, ST0,
            MM0, MM1, MM2, MM3, MM4, MM5, MM6, MM7,
            XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7,
            XMM8, XMM9, XMM10, XMM11, XMM12, XMM13, XMM14, XMM15, EFLAGS],
    Uses = [ESP] in
def TLS_addr32 : I<0, Pseudo, (outs), (ins lea32mem:$sym),
                  "leal\t$sym, %eax; "
                  "call\t___tls_get_addr@PLT",
                  [(X86tlsaddr tls32addr:$sym)]>,
                  Requires<[In32BitMode]>;

let AddedComplexity = 5, isCodeGenOnly = 1 in
def GS_MOV32rm : I<0x8B, MRMSrcMem, (outs GR32:$dst), (ins i32mem:$src),
                   "movl\t%gs:$src, $dst",
                   [(set GR32:$dst, (gsload addr:$src))]>, SegGS;

let AddedComplexity = 5, isCodeGenOnly = 1 in
def FS_MOV32rm : I<0x8B, MRMSrcMem, (outs GR32:$dst), (ins i32mem:$src),
                   "movl\t%fs:$src, $dst",
                   [(set GR32:$dst, (fsload addr:$src))]>, SegFS;

//===----------------------------------------------------------------------===//
// EH Pseudo Instructions
//
let isTerminator = 1, isReturn = 1, isBarrier = 1,
    hasCtrlDep = 1, isCodeGenOnly = 1 in {
def EH_RETURN   : I<0xC3, RawFrm, (outs), (ins GR32:$addr),
                    "ret\t#eh_return, addr: $addr",
                    [(X86ehret GR32:$addr)]>;

}

//===----------------------------------------------------------------------===//
// Atomic support
//

// Atomic swap. These are just normal xchg instructions. But since a memory
// operand is referenced, the atomicity is ensured.
let Constraints = "$val = $dst" in {
def XCHG32rm : I<0x87, MRMSrcMem, (outs GR32:$dst), 
                 (ins GR32:$val, i32mem:$ptr),
               "xchg{l}\t{$val, $ptr|$ptr, $val}", 
               [(set GR32:$dst, (atomic_swap_32 addr:$ptr, GR32:$val))]>;
def XCHG16rm : I<0x87, MRMSrcMem, (outs GR16:$dst), 
                 (ins GR16:$val, i16mem:$ptr),
               "xchg{w}\t{$val, $ptr|$ptr, $val}", 
               [(set GR16:$dst, (atomic_swap_16 addr:$ptr, GR16:$val))]>, 
                OpSize;
def XCHG8rm  : I<0x86, MRMSrcMem, (outs GR8:$dst), (ins GR8:$val, i8mem:$ptr),
               "xchg{b}\t{$val, $ptr|$ptr, $val}", 
               [(set GR8:$dst, (atomic_swap_8 addr:$ptr, GR8:$val))]>;

def XCHG32rr : I<0x87, MRMSrcReg, (outs GR32:$dst), (ins GR32:$val, GR32:$src),
                 "xchg{l}\t{$val, $src|$src, $val}", []>;
def XCHG16rr : I<0x87, MRMSrcReg, (outs GR16:$dst), (ins GR16:$val, GR16:$src),
                 "xchg{w}\t{$val, $src|$src, $val}", []>, OpSize;
def XCHG8rr : I<0x86, MRMSrcReg, (outs GR8:$dst), (ins GR8:$val, GR8:$src),
                "xchg{b}\t{$val, $src|$src, $val}", []>;
}

def XCHG16ar : I<0x90, AddRegFrm, (outs), (ins GR16:$src),
                  "xchg{w}\t{$src, %ax|%ax, $src}", []>, OpSize;
def XCHG32ar : I<0x90, AddRegFrm, (outs), (ins GR32:$src),
                  "xchg{l}\t{$src, %eax|%eax, $src}", []>;

// Atomic compare and swap.
let Defs = [EAX, EFLAGS], Uses = [EAX] in {
def LCMPXCHG32 : I<0xB1, MRMDestMem, (outs), (ins i32mem:$ptr, GR32:$swap),
               "lock\n\t"
               "cmpxchg{l}\t{$swap, $ptr|$ptr, $swap}",
               [(X86cas addr:$ptr, GR32:$swap, 4)]>, TB, LOCK;
}
let Defs = [EAX, EDX, EFLAGS], Uses = [EAX, EBX, ECX, EDX] in {
def LCMPXCHG8B : I<0xC7, MRM1m, (outs), (ins i64mem:$ptr),
               "lock\n\t"
               "cmpxchg8b\t$ptr",
               [(X86cas8 addr:$ptr)]>, TB, LOCK;
}

let Defs = [AX, EFLAGS], Uses = [AX] in {
def LCMPXCHG16 : I<0xB1, MRMDestMem, (outs), (ins i16mem:$ptr, GR16:$swap),
               "lock\n\t"
               "cmpxchg{w}\t{$swap, $ptr|$ptr, $swap}",
               [(X86cas addr:$ptr, GR16:$swap, 2)]>, TB, OpSize, LOCK;
}
let Defs = [AL, EFLAGS], Uses = [AL] in {
def LCMPXCHG8 : I<0xB0, MRMDestMem, (outs), (ins i8mem:$ptr, GR8:$swap),
               "lock\n\t"
               "cmpxchg{b}\t{$swap, $ptr|$ptr, $swap}",
               [(X86cas addr:$ptr, GR8:$swap, 1)]>, TB, LOCK;
}

// Atomic exchange and add
let Constraints = "$val = $dst", Defs = [EFLAGS] in {
def LXADD32 : I<0xC1, MRMSrcMem, (outs GR32:$dst), (ins GR32:$val, i32mem:$ptr),
               "lock\n\t"
               "xadd{l}\t{$val, $ptr|$ptr, $val}",
               [(set GR32:$dst, (atomic_load_add_32 addr:$ptr, GR32:$val))]>,
                TB, LOCK;
def LXADD16 : I<0xC1, MRMSrcMem, (outs GR16:$dst), (ins GR16:$val, i16mem:$ptr),
               "lock\n\t"
               "xadd{w}\t{$val, $ptr|$ptr, $val}",
               [(set GR16:$dst, (atomic_load_add_16 addr:$ptr, GR16:$val))]>,
                TB, OpSize, LOCK;
def LXADD8  : I<0xC0, MRMSrcMem, (outs GR8:$dst), (ins GR8:$val, i8mem:$ptr),
               "lock\n\t"
               "xadd{b}\t{$val, $ptr|$ptr, $val}",
               [(set GR8:$dst, (atomic_load_add_8 addr:$ptr, GR8:$val))]>,
                TB, LOCK;
}

def XADD8rr : I<0xC0, MRMDestReg, (outs GR8:$dst), (ins GR8:$src),
                "xadd{b}\t{$src, $dst|$dst, $src}", []>, TB;
def XADD16rr : I<0xC1, MRMDestReg, (outs GR16:$dst), (ins GR16:$src),
                 "xadd{w}\t{$src, $dst|$dst, $src}", []>, TB, OpSize;
def XADD32rr  : I<0xC1, MRMDestReg, (outs GR32:$dst), (ins GR32:$src),
                 "xadd{l}\t{$src, $dst|$dst, $src}", []>, TB;

def XADD8rm   : I<0xC0, MRMDestMem, (outs), (ins i8mem:$dst, GR8:$src),
                 "xadd{b}\t{$src, $dst|$dst, $src}", []>, TB;
def XADD16rm  : I<0xC1, MRMDestMem, (outs), (ins i16mem:$dst, GR16:$src),
                 "xadd{w}\t{$src, $dst|$dst, $src}", []>, TB, OpSize;
def XADD32rm  : I<0xC1, MRMDestMem, (outs), (ins i32mem:$dst, GR32:$src),
                 "xadd{l}\t{$src, $dst|$dst, $src}", []>, TB;

def CMPXCHG8rr : I<0xB0, MRMDestReg, (outs GR8:$dst), (ins GR8:$src),
                   "cmpxchg{b}\t{$src, $dst|$dst, $src}", []>, TB;
def CMPXCHG16rr : I<0xB1, MRMDestReg, (outs GR16:$dst), (ins GR16:$src),
                    "cmpxchg{w}\t{$src, $dst|$dst, $src}", []>, TB, OpSize;
def CMPXCHG32rr  : I<0xB1, MRMDestReg, (outs GR32:$dst), (ins GR32:$src),
                     "cmpxchg{l}\t{$src, $dst|$dst, $src}", []>, TB;

def CMPXCHG8rm   : I<0xB0, MRMDestMem, (outs), (ins i8mem:$dst, GR8:$src),
                     "cmpxchg{b}\t{$src, $dst|$dst, $src}", []>, TB;
def CMPXCHG16rm  : I<0xB1, MRMDestMem, (outs), (ins i16mem:$dst, GR16:$src),
                     "cmpxchg{w}\t{$src, $dst|$dst, $src}", []>, TB, OpSize;
def CMPXCHG32rm  : I<0xB1, MRMDestMem, (outs), (ins i32mem:$dst, GR32:$src),
                     "cmpxchg{l}\t{$src, $dst|$dst, $src}", []>, TB;

let Defs = [EAX, EDX, EFLAGS], Uses = [EAX, EBX, ECX, EDX] in
def CMPXCHG8B : I<0xC7, MRM1m, (outs), (ins i64mem:$dst),
                  "cmpxchg8b\t$dst", []>, TB;

// Optimized codegen when the non-memory output is not used.
// FIXME: Use normal add / sub instructions and add lock prefix dynamically.
let Defs = [EFLAGS] in {
def LOCK_ADD8mr  : I<0x00, MRMDestMem, (outs), (ins i8mem:$dst, GR8:$src2),
                    "lock\n\t"
                    "add{b}\t{$src2, $dst|$dst, $src2}", []>, LOCK;
def LOCK_ADD16mr  : I<0x01, MRMDestMem, (outs), (ins i16mem:$dst, GR16:$src2),
                    "lock\n\t"
                    "add{w}\t{$src2, $dst|$dst, $src2}", []>, OpSize, LOCK;
def LOCK_ADD32mr  : I<0x01, MRMDestMem, (outs), (ins i32mem:$dst, GR32:$src2),
                    "lock\n\t"
                    "add{l}\t{$src2, $dst|$dst, $src2}", []>, LOCK;
def LOCK_ADD8mi   : Ii8<0x80, MRM0m, (outs), (ins i8mem :$dst, i8imm :$src2),
                    "lock\n\t"
                    "add{b}\t{$src2, $dst|$dst, $src2}", []>, LOCK;
def LOCK_ADD16mi  : Ii16<0x81, MRM0m, (outs), (ins i16mem:$dst, i16imm:$src2),
                    "lock\n\t"
                     "add{w}\t{$src2, $dst|$dst, $src2}", []>, LOCK;
def LOCK_ADD32mi  : Ii32<0x81, MRM0m, (outs), (ins i32mem:$dst, i32imm:$src2),
                    "lock\n\t"
                    "add{l}\t{$src2, $dst|$dst, $src2}", []>, LOCK;
def LOCK_ADD16mi8 : Ii8<0x83, MRM0m, (outs), (ins i16mem:$dst, i16i8imm :$src2),
                    "lock\n\t"
                    "add{w}\t{$src2, $dst|$dst, $src2}", []>, OpSize, LOCK;
def LOCK_ADD32mi8 : Ii8<0x83, MRM0m, (outs), (ins i32mem:$dst, i32i8imm :$src2),
                    "lock\n\t"
                    "add{l}\t{$src2, $dst|$dst, $src2}", []>, LOCK;

def LOCK_INC8m  : I<0xFE, MRM0m, (outs), (ins i8mem :$dst),
                    "lock\n\t"
                    "inc{b}\t$dst", []>, LOCK;
def LOCK_INC16m : I<0xFF, MRM0m, (outs), (ins i16mem:$dst),
                    "lock\n\t"
                    "inc{w}\t$dst", []>, OpSize, LOCK;
def LOCK_INC32m : I<0xFF, MRM0m, (outs), (ins i32mem:$dst),
                    "lock\n\t"
                    "inc{l}\t$dst", []>, LOCK;

def LOCK_SUB8mr   : I<0x28, MRMDestMem, (outs), (ins i8mem :$dst, GR8 :$src2),
                    "lock\n\t"
                    "sub{b}\t{$src2, $dst|$dst, $src2}", []>, LOCK;
def LOCK_SUB16mr  : I<0x29, MRMDestMem, (outs), (ins i16mem:$dst, GR16:$src2),
                    "lock\n\t"
                    "sub{w}\t{$src2, $dst|$dst, $src2}", []>, OpSize, LOCK;
def LOCK_SUB32mr  : I<0x29, MRMDestMem, (outs), (ins i32mem:$dst, GR32:$src2), 
                    "lock\n\t"
                    "sub{l}\t{$src2, $dst|$dst, $src2}", []>, LOCK;
def LOCK_SUB8mi   : Ii8<0x80, MRM5m, (outs), (ins i8mem :$dst, i8imm:$src2), 
                    "lock\n\t"
                    "sub{b}\t{$src2, $dst|$dst, $src2}", []>, LOCK;
def LOCK_SUB16mi  : Ii16<0x81, MRM5m, (outs), (ins i16mem:$dst, i16imm:$src2), 
                    "lock\n\t"
                    "sub{w}\t{$src2, $dst|$dst, $src2}", []>, OpSize, LOCK;
def LOCK_SUB32mi  : Ii32<0x81, MRM5m, (outs), (ins i32mem:$dst, i32imm:$src2), 
                    "lock\n\t"
                     "sub{l}\t{$src2, $dst|$dst, $src2}", []>, LOCK;
def LOCK_SUB16mi8 : Ii8<0x83, MRM5m, (outs), (ins i16mem:$dst, i16i8imm :$src2),
                    "lock\n\t"
                     "sub{w}\t{$src2, $dst|$dst, $src2}", []>, OpSize, LOCK;
def LOCK_SUB32mi8 : Ii8<0x83, MRM5m, (outs), (ins i32mem:$dst, i32i8imm :$src2),
                    "lock\n\t"
                     "sub{l}\t{$src2, $dst|$dst, $src2}", []>, LOCK;

def LOCK_DEC8m  : I<0xFE, MRM1m, (outs), (ins i8mem :$dst),
                    "lock\n\t"
                    "dec{b}\t$dst", []>, LOCK;
def LOCK_DEC16m : I<0xFF, MRM1m, (outs), (ins i16mem:$dst),
                    "lock\n\t"
                    "dec{w}\t$dst", []>, OpSize, LOCK;
def LOCK_DEC32m : I<0xFF, MRM1m, (outs), (ins i32mem:$dst),
                    "lock\n\t"
                    "dec{l}\t$dst", []>, LOCK;
}

// Atomic exchange, and, or, xor
let Constraints = "$val = $dst", Defs = [EFLAGS],
                  usesCustomInserter = 1 in {
def ATOMAND32 : I<0, Pseudo, (outs GR32:$dst),(ins i32mem:$ptr, GR32:$val),
               "#ATOMAND32 PSEUDO!", 
               [(set GR32:$dst, (atomic_load_and_32 addr:$ptr, GR32:$val))]>;
def ATOMOR32 : I<0, Pseudo, (outs GR32:$dst),(ins i32mem:$ptr, GR32:$val),
               "#ATOMOR32 PSEUDO!", 
               [(set GR32:$dst, (atomic_load_or_32 addr:$ptr, GR32:$val))]>;
def ATOMXOR32 : I<0, Pseudo,(outs GR32:$dst),(ins i32mem:$ptr, GR32:$val),