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Added patterns for 8-bit multiply

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llvm-svn: 25338
This commit is contained in:
Evan Cheng 2006-01-15 10:05:20 +00:00
parent ddc62a9b61
commit fe83dd85c8
1 changed files with 11 additions and 2 deletions
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13
lib/Target/X86/X86InstrInfo.td
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@ -682,14 +682,23 @@ def MOV32mr : I<0x89, MRMDestMem, (ops i32mem:$dst, R32:$src),
//
// Extra precision multiplication
def MUL8r : I<0xF6, MRM4r, (ops R8:$src), "mul{b} $src", []>,
def MUL8r : I<0xF6, MRM4r, (ops R8:$src), "mul{b} $src",
// FIXME: Used for 8-bit mul, ignore result upper 8 bits.
// This probably ought to be moved to a def : Pat<> if the
// syntax can be accepted.
[(set AL, (mul AL, R8:$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]
"mul{b} $src",
// FIXME: Used for 8-bit mul, ignore result upper 8 bits.
// This probably ought to be moved to a def : Pat<> if the
// syntax can be accepted.
[(set AL, (mul AL, (loadi8 addr:$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]