//====- X86InstrMMX.td - Describe the X86 Instruction Set -------*- C++ -*-===//
// 
//                     The LLVM Compiler Infrastructure
//
// This file was developed by the Evan Cheng and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
// 
//===----------------------------------------------------------------------===//
//
// This file describes the X86 MMX instruction set, defining the instructions,
// and properties of the instructions which are needed for code generation,
// machine code emission, and analysis.
//
//===----------------------------------------------------------------------===//

// Some 'special' instructions
def IMPLICIT_DEF_VR64 : I<0, Pseudo, (ops VR64:$dst),
                          "#IMPLICIT_DEF $dst",
                          [(set VR64:$dst, (v8i8 (undef)))]>,
                        Requires<[HasMMX]>;

def : Pat<(v4i16 (undef)), (IMPLICIT_DEF_VR64)>,  Requires<[HasMMX]>;
def : Pat<(v2i32 (undef)), (IMPLICIT_DEF_VR64)>,  Requires<[HasMMX]>;

// Move Instructions
def MOVD64rr : I<0x6E, MRMSrcReg, (ops VR64:$dst, R32:$src),
                 "movd {$src, $dst|$dst, $src}",
                 [(set VR64:$dst,
                      (v2i32 (scalar_to_vector R32:$src)))]>, TB,
               Requires<[HasMMX]>;
def MOVD64rm : I<0x6E, MRMSrcMem, (ops VR64:$dst, i32mem:$src),
                 "movd {$src, $dst|$dst, $src}", []>, TB,
               Requires<[HasMMX]>;
def MOVD64mr : I<0x7E, MRMDestMem, (ops i32mem:$dst, VR64:$src),
                 "movd {$src, $dst|$dst, $src}", []>, TB,
               Requires<[HasMMX]>;

def MOVQ64rr : I<0x6F, MRMSrcReg, (ops VR64:$dst, VR64:$src),
                 "movq {$src, $dst|$dst, $src}", []>, TB,
               Requires<[HasMMX]>;
def MOVQ64rm : I<0x6F, MRMSrcMem, (ops VR64:$dst, i64mem:$src),
                 "movq {$src, $dst|$dst, $src}", []>, TB,
               Requires<[HasMMX]>;
def MOVQ64mr : I<0x7F, MRMDestMem, (ops i64mem:$dst, VR64:$src),
                 "movq {$src, $dst|$dst, $src}", []>, TB,
               Requires<[HasMMX]>;