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| author | Manman Ren <mren@apple.com> | 2012-10-30 22:15:38 +0000 |
|---|---|---|
| committer | Manman Ren <mren@apple.com> | 2012-10-30 22:15:38 +0000 |
| commit | 4c74a956b2621bb7bb1df0b2f7571060eb095464 (patch) | |
| tree | b3bc0ee117a8be8e88367fb60d45ced867132a4d /lib/Target/X86/X86InstrMMX.td | |
| parent | a368b89f2842530d07c0ac8e3b533882e165f197 (diff) | |
| download | llvm-4c74a956b2621bb7bb1df0b2f7571060eb095464.tar.gz llvm-4c74a956b2621bb7bb1df0b2f7571060eb095464.tar.bz2 llvm-4c74a956b2621bb7bb1df0b2f7571060eb095464.tar.xz | |
X86 MMX: optimize transfer from mmx to i32
We used to generate a store (movq) + a load.
Now we use movd.
rdar://9946746
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167056 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86InstrMMX.td')
| -rw-r--r-- | lib/Target/X86/X86InstrMMX.td | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/lib/Target/X86/X86InstrMMX.td b/lib/Target/X86/X86InstrMMX.td index bd5485840d..127af6f7f9 100644 --- a/lib/Target/X86/X86InstrMMX.td +++ b/lib/Target/X86/X86InstrMMX.td @@ -207,8 +207,14 @@ def MMX_MOVD64rm : MMXI<0x6E, MRMSrcMem, (outs VR64:$dst), (ins i32mem:$src), let mayStore = 1 in def MMX_MOVD64mr : MMXI<0x7E, MRMDestMem, (outs), (ins i32mem:$dst, VR64:$src), "movd\t{$src, $dst|$dst, $src}", [], IIC_MMX_MOV_MM_RM>; -def MMX_MOVD64grr : MMXI<0x7E, MRMDestReg, (outs), (ins GR32:$dst, VR64:$src), - "movd\t{$src, $dst|$dst, $src}", [], IIC_MMX_MOV_REG_MM>; + +// Low word of MMX to GPR. +def MMX_X86movd2w : SDNode<"X86ISD::MMX_MOVD2W", SDTypeProfile<1, 1, + [SDTCisVT<0, i32>, SDTCisVT<1, x86mmx>]>>; +def MMX_MOVD64grr : MMXI<0x7E, MRMDestReg, (outs GR32:$dst), (ins VR64:$src), + "movd\t{$src, $dst|$dst, $src}", + [(set GR32:$dst, + (MMX_X86movd2w (x86mmx VR64:$src)))], IIC_MMX_MOV_REG_MM>; let neverHasSideEffects = 1 in def MMX_MOVD64to64rr : MMXRI<0x6E, MRMSrcReg, (outs VR64:$dst), (ins GR64:$src), |