diff options
| author | Simon Pilgrim <llvm-dev@redking.me.uk> | 2017-08-16 13:50:20 +0000 |
|---|---|---|
| committer | Simon Pilgrim <llvm-dev@redking.me.uk> | 2017-08-16 13:50:20 +0000 |
| commit | c63f93a197a14d263c49ea65e2c3df7af4ea3efc (patch) | |
| tree | 0124fc9e78565ceda0c73a8dbe120642f2984fd4 /llvm/lib/Target | |
| parent | 75ebc568e250c8c767ee2d60ed26ca3d2a085316 (diff) | |
| download | bcm5719-llvm-c63f93a197a14d263c49ea65e2c3df7af4ea3efc.tar.gz bcm5719-llvm-c63f93a197a14d263c49ea65e2c3df7af4ea3efc.zip | |
[CostModel][X86][XOP] Improve costs for XOP shuffles
VPPERM/VPERMIL2PD/VPERMIL2PS all provide more effective 2-input shuffles than regular AVX instructions
llvm-svn: 311005
Diffstat (limited to 'llvm/lib/Target')
| -rw-r--r-- | llvm/lib/Target/X86/X86TargetTransformInfo.cpp | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86TargetTransformInfo.cpp b/llvm/lib/Target/X86/X86TargetTransformInfo.cpp index ed56e4512f6..2f44d610840 100644 --- a/llvm/lib/Target/X86/X86TargetTransformInfo.cpp +++ b/llvm/lib/Target/X86/X86TargetTransformInfo.cpp @@ -861,6 +861,28 @@ int X86TTIImpl::getShuffleCost(TTI::ShuffleKind Kind, Type *Tp, int Index, if (const auto *Entry = CostTableLookup(AVX2ShuffleTbl, Kind, LT.second)) return LT.first * Entry->Cost; + static const CostTblEntry XOPShuffleTbl[] = { + { TTI::SK_PermuteSingleSrc, MVT::v4f64, 2 }, // vperm2f128 + vpermil2pd + { TTI::SK_PermuteSingleSrc, MVT::v8f32, 2 }, // vperm2f128 + vpermil2ps + { TTI::SK_PermuteSingleSrc, MVT::v4i64, 2 }, // vperm2f128 + vpermil2pd + { TTI::SK_PermuteSingleSrc, MVT::v8i32, 2 }, // vperm2f128 + vpermil2ps + { TTI::SK_PermuteSingleSrc, MVT::v16i16, 4 }, // vextractf128 + 2*vpperm + // + vinsertf128 + { TTI::SK_PermuteSingleSrc, MVT::v32i8, 4 }, // vextractf128 + 2*vpperm + // + vinsertf128 + + { TTI::SK_PermuteTwoSrc, MVT::v16i16, 9 }, // 2*vextractf128 + 6*vpperm + // + vinsertf128 + { TTI::SK_PermuteTwoSrc, MVT::v8i16, 1 }, // vpperm + { TTI::SK_PermuteTwoSrc, MVT::v32i8, 9 }, // 2*vextractf128 + 6*vpperm + // + vinsertf128 + { TTI::SK_PermuteTwoSrc, MVT::v16i8, 1 }, // vpperm + }; + + if (ST->hasXOP()) + if (const auto *Entry = CostTableLookup(XOPShuffleTbl, Kind, LT.second)) + return LT.first * Entry->Cost; + static const CostTblEntry AVX1ShuffleTbl[] = { { TTI::SK_Broadcast, MVT::v4f64, 2 }, // vperm2f128 + vpermilpd { TTI::SK_Broadcast, MVT::v8f32, 2 }, // vperm2f128 + vpermilps |
