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Another expansion for i64 multiply, suitable for PPC.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43314 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen 2007-10-24 22:26:08 +00:00
parent 0bd5fcf49f
commit 8eadd5a6db
1 changed files with 9 additions and 0 deletions
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9
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -5930,6 +5930,15 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
Hi = DAG.getNode(ISD::ADD, NVT, Hi, LH);
break;
}
if (HasMULHU) {
Lo = DAG.getNode(ISD::MUL, NVT, LL, RL);
Hi = DAG.getNode(ISD::MULHU, NVT, LL, RL);
RH = DAG.getNode(ISD::MUL, NVT, LL, RH);
LH = DAG.getNode(ISD::MUL, NVT, LH, RL);
Hi = DAG.getNode(ISD::ADD, NVT, Hi, RH);
Hi = DAG.getNode(ISD::ADD, NVT, Hi, LH);
break;
}
}
// If nothing else, we can make a libcall.