Changes in directory llvm/lib/Target/X86:
X86ISelLowering.cpp updated: 1.89 -> 1.90
---
Log message:
If SSE3 is available, promote FP_TO_UINT i32 to FP_TO_SINT i64 to take
advantage of fisttpll.
---
Diffs of the changes: (+2 -1)
X86ISelLowering.cpp | 3 ++-
1 files changed, 2 insertions(+), 1 deletion(-)
Index: llvm/lib/Target/X86/X86ISelLowering.cpp
diff -u llvm/lib/Target/X86/X86ISelLowering.cpp:1.89
llvm/lib/Target/X86/X86ISelLowering.cpp:1.90
--- llvm/lib/Target/X86/X86ISelLowering.cpp:1.89 Fri Feb 17 18:15:05 2006
+++ llvm/lib/Target/X86/X86ISelLowering.cpp Sat Feb 18 01:26:17 2006
@@ -101,12 +101,13 @@
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);
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