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The sequence for ppcf128 compares was not IEEE

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safe in the presence of NaNs.

llvm-svn: 56136
This commit is contained in:
Dale Johannesen 2008-09-12 00:30:56 +00:00
parent 0b6d3a9a9b
commit fbc17046ff
1 changed files with 6 additions and 4 deletions
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10
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -4763,14 +4763,16 @@ void SelectionDAGLegalize::LegalizeSetCCOperands(SDValue &LHS,
if (VT==MVT::ppcf128) {
// FIXME: This generated code sucks. We want to generate
// FCMP crN, hi1, hi2
// FCMPU crN, hi1, hi2
// BNE crN, L:
// FCMP crN, lo1, lo2
// FCMPU crN, lo1, lo2
// The following can be improved, but not that much.
Tmp1 = DAG.getSetCC(TLI.getSetCCResultType(LHSHi), LHSHi, RHSHi, ISD::SETEQ);
Tmp1 = DAG.getSetCC(TLI.getSetCCResultType(LHSHi), LHSHi, RHSHi,
ISD::SETOEQ);
Tmp2 = DAG.getSetCC(TLI.getSetCCResultType(LHSLo), LHSLo, RHSLo, CCCode);
Tmp3 = DAG.getNode(ISD::AND, Tmp1.getValueType(), Tmp1, Tmp2);
Tmp1 = DAG.getSetCC(TLI.getSetCCResultType(LHSHi), LHSHi, RHSHi, ISD::SETNE);
Tmp1 = DAG.getSetCC(TLI.getSetCCResultType(LHSHi), LHSHi, RHSHi,
ISD::SETUNE);
Tmp2 = DAG.getSetCC(TLI.getSetCCResultType(LHSHi), LHSHi, RHSHi, CCCode);
Tmp1 = DAG.getNode(ISD::AND, Tmp1.getValueType(), Tmp1, Tmp2);
Tmp1 = DAG.getNode(ISD::OR, Tmp1.getValueType(), Tmp1, Tmp3);