diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index f8ff6a055c3..3af393484ee 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -298,6 +298,14 @@ X86TargetLowering::X86TargetLowering(TargetMachine &TM) setOperationAction(ISD::ConstantFP, MVT::f64, Expand); setOperationAction(ISD::ConstantFP, MVT::f32, Expand); addLegalFPImmediate(+0.0); // xorps / xorpd + + // Conversions to long double (in X87) go through memory. + setConvertAction(MVT::f32, MVT::f80, Expand); + setConvertAction(MVT::f64, MVT::f80, Expand); + + // Conversions from long double (in X87) go through memory. + setConvertAction(MVT::f80, MVT::f32, Expand); + setConvertAction(MVT::f80, MVT::f64, Expand); } else { // Set up the FP register classes. addRegisterClass(MVT::f64, X86::RFP64RegisterClass); @@ -307,7 +315,11 @@ X86TargetLowering::X86TargetLowering(TargetMachine &TM) setOperationAction(ISD::UNDEF, MVT::f32, Expand); setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand); setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand); - setOperationAction(ISD::FP_ROUND, MVT::f32, Expand); + + // Floating truncations need to go through memory. + setConvertAction(MVT::f80, MVT::f32, Expand); + setConvertAction(MVT::f64, MVT::f32, Expand); + setConvertAction(MVT::f80, MVT::f64, Expand); if (!UnsafeFPMath) { setOperationAction(ISD::FSIN , MVT::f64 , Expand); |
