Author: lattner Date: Sun Jan 27 00:19:31 2008 New Revision: 46411 URL: http://llvm.org/viewvc/llvm-project?rev=46411&view=rev Log: Use fldz and fld1 for long double constants instead of a constant pool load.
Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.cpp?rev=46411&r1=46410&r2=46411&view=diff ============================================================================== --- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original) +++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Sun Jan 27 00:19:31 2008 @@ -455,7 +455,20 @@ addRegisterClass(MVT::f80, X86::RFP80RegisterClass); setOperationAction(ISD::UNDEF, MVT::f80, Expand); setOperationAction(ISD::FCOPYSIGN, MVT::f80, Expand); - setOperationAction(ISD::ConstantFP, MVT::f80, Expand); + { + setOperationAction(ISD::ConstantFP, MVT::f80, Expand); + APFloat TmpFlt(+0.0); + TmpFlt.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven); + addLegalFPImmediate(TmpFlt); // FLD0 + TmpFlt.changeSign(); + addLegalFPImmediate(TmpFlt); // FLD0/FCHS + APFloat TmpFlt2(+1.0); + TmpFlt2.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven); + addLegalFPImmediate(TmpFlt2); // FLD1 + TmpFlt2.changeSign(); + addLegalFPImmediate(TmpFlt2); // FLD1/FCHS + } + if (!UnsafeFPMath) { setOperationAction(ISD::FSIN , MVT::f80 , Expand); setOperationAction(ISD::FCOS , MVT::f80 , Expand); _______________________________________________ llvm-commits mailing list llvm-commits@cs.uiuc.edu http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits