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Add neg and not patterns which fold load + stores.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24685 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2005-12-13 00:54:44 +00:00
parent 5a38e0210d
commit 5ce4edb967
1 changed files with 12 additions and 6 deletions
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18
lib/Target/X86/X86InstrInfo.td
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@ -682,9 +682,12 @@ def NEG16r : I<0xF7, MRM3r, (ops R16:$dst, R16:$src), "neg{w} $dst",
def NEG32r : I<0xF7, MRM3r, (ops R32:$dst, R32:$src), "neg{l} $dst",
[(set R32:$dst, (ineg R32:$src))]>;
let isTwoAddress = 0 in {
def NEG8m : I<0xF6, MRM3m, (ops i8mem :$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} $dst", []>;
def NEG8m : I<0xF6, MRM3m, (ops i8mem :$dst), "neg{b} $dst",
[(store (ineg (i8 (load addr:$dst))), addr:$dst)]>;
def NEG16m : I<0xF7, MRM3m, (ops i16mem:$dst), "neg{w} $dst",
[(store (ineg (i16 (load addr:$dst))), addr:$dst)]>, OpSize;
def NEG32m : I<0xF7, MRM3m, (ops i32mem:$dst), "neg{l} $dst",
[(store (ineg (i32 (load addr:$dst))), addr:$dst)]>;
}
def NOT8r : I<0xF6, MRM2r, (ops R8 :$dst, R8 :$src), "not{b} $dst",
@ -694,9 +697,12 @@ def NOT16r : I<0xF7, MRM2r, (ops R16:$dst, R16:$src), "not{w} $dst",
def NOT32r : I<0xF7, MRM2r, (ops R32:$dst, R32:$src), "not{l} $dst",
[(set R32:$dst, (not R32:$src))]>;
let isTwoAddress = 0 in {
def NOT8m : I<0xF6, MRM2m, (ops i8mem :$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} $dst", []>;
def NOT8m : I<0xF6, MRM2m, (ops i8mem :$dst), "not{b} $dst",
[(store (not (i8 (load addr:$dst))), addr:$dst)]>;
def NOT16m : I<0xF7, MRM2m, (ops i16mem:$dst), "not{w} $dst",
[(store (not (i16 (load addr:$dst))), addr:$dst)]>, OpSize;
def NOT32m : I<0xF7, MRM2m, (ops i32mem:$dst), "not{l} $dst",
[(store (not (i32 (load addr:$dst))), addr:$dst)]>;
}
// TODO: inc/dec is slow for P4, but fast for Pentium-M.