diff options
Diffstat (limited to 'lib/Target/X86/X86ISelLowering.cpp')
-rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 60 |
1 files changed, 58 insertions, 2 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 6b5466d70b..5853b5109c 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -17526,6 +17526,23 @@ int FindInTable(const X86CostTblEntry *Tbl, unsigned len, int ISD, MVT Ty) { return -1; } +struct X86TypeConversionCostTblEntry { + int ISD; + MVT Dst; + MVT Src; + unsigned Cost; +}; + +int FindInConvertTable(const X86TypeConversionCostTblEntry *Tbl, unsigned len, + int ISD, MVT Dst, MVT Src) { + for (unsigned int i = 0; i < len; ++i) + if (Tbl[i].ISD == ISD && Tbl[i].Src == Src && Tbl[i].Dst == Dst) + return i; + + // Could not find an entry. + return -1; +} + unsigned X86VectorTargetTransformInfo::getArithmeticInstrCost(unsigned Opcode, Type *Ty) const { @@ -17535,8 +17552,7 @@ X86VectorTargetTransformInfo::getArithmeticInstrCost(unsigned Opcode, int ISD = InstructionOpcodeToISD(Opcode); assert(ISD && "Invalid opcode"); - const X86Subtarget &ST = - TLI->getTargetMachine().getSubtarget<X86Subtarget>(); + const X86Subtarget &ST = TLI->getTargetMachine().getSubtarget<X86Subtarget>(); static const X86CostTblEntry AVX1CostTable[] = { // We don't have to scalarize unsupported ops. We can issue two half-sized @@ -17647,5 +17663,45 @@ unsigned X86VectorTargetTransformInfo::getCmpSelInstrCost(unsigned Opcode, return VectorTargetTransformImpl::getCmpSelInstrCost(Opcode, ValTy, CondTy); } +unsigned X86VectorTargetTransformInfo::getCastInstrCost(unsigned Opcode, + Type *Dst, + Type *Src) const { + int ISD = InstructionOpcodeToISD(Opcode); + assert(ISD && "Invalid opcode"); + + EVT SrcTy = TLI->getValueType(Src); + EVT DstTy = TLI->getValueType(Dst); + + if (!SrcTy.isSimple() || !DstTy.isSimple()) + return VectorTargetTransformImpl::getCastInstrCost(Opcode, Dst, Src); + + const X86Subtarget &ST = TLI->getTargetMachine().getSubtarget<X86Subtarget>(); + + static const X86TypeConversionCostTblEntry AVXConversionTbl[] = { + { ISD::SIGN_EXTEND, MVT::v8i32, MVT::v8i16, 1 }, + { ISD::ZERO_EXTEND, MVT::v8i32, MVT::v8i16, 1 }, + { ISD::SIGN_EXTEND, MVT::v4i64, MVT::v4i32, 1 }, + { ISD::ZERO_EXTEND, MVT::v4i64, MVT::v4i32, 1 }, + { ISD::TRUNCATE, MVT::v4i32, MVT::v4i64, 1 }, + { ISD::TRUNCATE, MVT::v8i16, MVT::v8i32, 1 }, + { ISD::SINT_TO_FP, MVT::v8f32, MVT::v8i8, 1 }, + { ISD::SINT_TO_FP, MVT::v4f32, MVT::v4i8, 1 }, + { ISD::UINT_TO_FP, MVT::v8f32, MVT::v8i8, 1 }, + { ISD::UINT_TO_FP, MVT::v4f32, MVT::v4i8, 1 }, + { ISD::FP_TO_SINT, MVT::v8i8, MVT::v8f32, 1 }, + { ISD::FP_TO_SINT, MVT::v4i8, MVT::v4f32, 1 }, + { ISD::ZERO_EXTEND, MVT::v8i32, MVT::v8i1, 6 }, + { ISD::SIGN_EXTEND, MVT::v8i32, MVT::v8i1, 9 }, + }; + if (ST.hasAVX()) { + int Idx = FindInConvertTable(AVXConversionTbl, + array_lengthof(AVXConversionTbl), + ISD, DstTy.getSimpleVT(), SrcTy.getSimpleVT()); + if (Idx != -1) + return AVXConversionTbl[Idx].Cost; + } + + return VectorTargetTransformImpl::getCastInstrCost(Opcode, Dst, Src); +} |