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If SSE3 is available, promote FP_TO_UINT i32 to FP_TO_SINT i64 to take

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advantage of fisttpll.

llvm-svn: 26288
This commit is contained in:
Evan Cheng 2006-02-18 07:26:17 +00:00
parent 6e4fbcce8f
commit 063df91002
1 changed files with 2 additions and 1 deletions
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3
lib/Target/X86/X86ISelLowering.cpp
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@ -101,12 +101,13 @@ X86TargetLowering::X86TargetLowering(TargetMachine &TM)
setOperationAction(ISD::FP_TO_UINT , MVT::i8 , Promote);
setOperationAction(ISD::FP_TO_UINT , MVT::i16 , Promote);
if (X86ScalarSSE)
if (X86ScalarSSE && !Subtarget->hasSSE3())
// Expand FP_TO_UINT into a select.
// FIXME: We would like to use a Custom expander here eventually to do
// the optimal thing for SSE vs. the default expansion in the legalizer.
setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Expand);
else
// With SSE3 we can use fisttpll to convert to a signed i64.
setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Promote);
setOperationAction(ISD::BIT_CONVERT , MVT::f32 , Expand);