diff options
| author | Evan Cheng <evan.cheng@apple.com> | 2008-12-03 19:38:05 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2008-12-03 19:38:05 +0000 |
| commit | 62fb4f2e1c11d8bd8a677a015ba58c04dc5eabfc (patch) | |
| tree | 7ddb7e0e8d9b3d28c9bdfa4650c692197cd66267 /lib | |
| parent | e561751e98b63908c6a3a68ed5dbc0703f3369b9 (diff) | |
Use mmx (punpckldq VR64, (mmx_v_set0)) to clear high 32-bits of a VR64 register.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60499 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/X86/X86InstrMMX.td | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/lib/Target/X86/X86InstrMMX.td b/lib/Target/X86/X86InstrMMX.td index 3bd9af5a9f..fd708013b7 100644 --- a/lib/Target/X86/X86InstrMMX.td +++ b/lib/Target/X86/X86InstrMMX.td @@ -587,11 +587,21 @@ let AddedComplexity = 15 in { let AddedComplexity = 20 in { def : Pat<(v8i8 (X86vzmovl (bc_v8i8 (load_mmx addr:$src)))), - (MMX_MOVZDI2PDIrm addr:$src)>; + (MMX_MOVZDI2PDIrm addr:$src)>; def : Pat<(v4i16 (X86vzmovl (bc_v4i16 (load_mmx addr:$src)))), - (MMX_MOVZDI2PDIrm addr:$src)>; + (MMX_MOVZDI2PDIrm addr:$src)>; def : Pat<(v2i32 (X86vzmovl (bc_v2i32 (load_mmx addr:$src)))), - (MMX_MOVZDI2PDIrm addr:$src)>; + (MMX_MOVZDI2PDIrm addr:$src)>; +} + +// Clear top half. +let AddedComplexity = 15 in { + def : Pat<(v8i8 (X86vzmovl VR64:$src)), + (MMX_PUNPCKLDQrr VR64:$src, (MMX_V_SET0))>; + def : Pat<(v4i16 (X86vzmovl VR64:$src)), + (MMX_PUNPCKLDQrr VR64:$src, (MMX_V_SET0))>; + def : Pat<(v2i32 (X86vzmovl VR64:$src)), + (MMX_PUNPCKLDQrr VR64:$src, (MMX_V_SET0))>; } // Scalar to v4i16 / v8i8. The source may be a GR32, but only the lower |