From 45af8fd8c2394fdc92ce3b528cc03dd1eb8c5b45 Mon Sep 17 00:00:00 2001 From: Evan Cheng Date: Sat, 18 Feb 2006 07:26:17 +0000 Subject: [PATCH] If SSE3 is available, promote FP_TO_UINT i32 to FP_TO_SINT i64 to take advantage of fisttpll. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26288 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/X86/X86ISelLowering.cpp | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index aa48d09fd41..7c84850683e 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -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);