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Vector fneg must be expanded into fsub -0.0, X.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40586 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2007-07-30 07:51:22 +00:00
parent db9530599e
commit 66ffe6be0c
3 changed files with 21 additions and 2 deletions
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lib/Target/PowerPC/PPCISelLowering.cpp
+11
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@@ -259,6 +259,7 @@ PPCTargetLowering::PPCTargetLowering(PPCTargetMachine &TM)
setOperationAction(ISD::UDIV, (MVT::ValueType)VT, Expand);
setOperationAction(ISD::UREM, (MVT::ValueType)VT, Expand);
setOperationAction(ISD::FDIV, (MVT::ValueType)VT, Expand);
setOperationAction(ISD::FNEG, (MVT::ValueType)VT, Expand);
setOperationAction(ISD::EXTRACT_VECTOR_ELT, (MVT::ValueType)VT, Expand);
setOperationAction(ISD::INSERT_VECTOR_ELT, (MVT::ValueType)VT, Expand);
setOperationAction(ISD::BUILD_VECTOR, (MVT::ValueType)VT, Expand);
@@ -523,6 +524,16 @@ bool PPC::isSplatShuffleMask(SDNode *N, unsigned EltSize) {
return true;
}
/// isAllNegativeZeroVector - Returns true if all elements of build_vector
/// are -0.0.
bool PPC::isAllNegativeZeroVector(SDNode *N) {
assert(N->getOpcode() == ISD::BUILD_VECTOR);
if (PPC::isSplatShuffleMask(N, N->getNumOperands()))
if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(N))
return CFP->isExactlyValue(-0.0);
return false;
}
/// getVSPLTImmediate - Return the appropriate VSPLT* immediate to splat the
/// specified isSplatShuffleMask VECTOR_SHUFFLE mask.
unsigned PPC::getVSPLTImmediate(SDNode *N, unsigned EltSize) {