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| author | Alexey Volkov <avolkov.intel@gmail.com> | 2014-11-21 11:19:34 +0000 |
|---|---|---|
| committer | Alexey Volkov <avolkov.intel@gmail.com> | 2014-11-21 11:19:34 +0000 |
| commit | fd1731d8765002abafcc97c358e6fcefa047285d (patch) | |
| tree | 6aae61c0d4df3a4c667ff381e28d3655f1b82039 /llvm/lib/Target/X86/X86.td | |
| parent | 30a990744b777c4d8414df452e5800cd1d67f352 (diff) | |
| download | bcm5719-llvm-fd1731d8765002abafcc97c358e6fcefa047285d.tar.gz bcm5719-llvm-fd1731d8765002abafcc97c358e6fcefa047285d.zip | |
[X86] For Silvermont CPU use 16-bit division instead of 64-bit for small positive numbers
Differential Revision: http://reviews.llvm.org/D5938
llvm-svn: 222521
Diffstat (limited to 'llvm/lib/Target/X86/X86.td')
| -rw-r--r-- | llvm/lib/Target/X86/X86.td | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/llvm/lib/Target/X86/X86.td b/llvm/lib/Target/X86/X86.td index 83f55d32975..9729f4638cb 100644 --- a/llvm/lib/Target/X86/X86.td +++ b/llvm/lib/Target/X86/X86.td @@ -167,9 +167,12 @@ def FeatureSMAP : SubtargetFeature<"smap", "HasSMAP", "true", "Support SMAP instructions">; def FeatureLeaForSP : SubtargetFeature<"lea-sp", "UseLeaForSP", "true", "Use LEA for adjusting the stack pointer">; -def FeatureSlowDivide : SubtargetFeature<"idiv-to-divb", - "HasSlowDivide", "true", - "Use small divide for positive values less than 256">; +def FeatureSlowDivide32 : SubtargetFeature<"idivl-to-divb", + "HasSlowDivide32", "true", + "Use 8-bit divide for positive values less than 256">; +def FeatureSlowDivide64 : SubtargetFeature<"idivq-to-divw", + "HasSlowDivide64", "true", + "Use 16-bit divide for positive values less than 65536">; def FeaturePadShortFunctions : SubtargetFeature<"pad-short-functions", "PadShortFunctions", "true", "Pad short functions">; @@ -234,7 +237,7 @@ def : ProcessorModel<"penryn", SandyBridgeModel, def : ProcessorModel<"atom", AtomModel, [ProcIntelAtom, FeatureSSSE3, FeatureCMPXCHG16B, FeatureMOVBE, FeatureSlowBTMem, FeatureLeaForSP, - FeatureSlowDivide, + FeatureSlowDivide32, FeatureSlowDivide64, FeatureCallRegIndirect, FeatureLEAUsesAG, FeaturePadShortFunctions]>; @@ -244,6 +247,7 @@ def : ProcessorModel<"slm", SLMModel, [ProcIntelSLM, FeatureSSE42, FeatureCMPXCHG16B, FeatureMOVBE, FeaturePOPCNT, FeaturePCLMUL, FeatureAES, + FeatureSlowDivide64, FeatureCallRegIndirect, FeaturePRFCHW, FeatureSlowLEA, FeatureSlowIncDec, |
