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Add shifts. 

llvm-svn: 22884
This commit is contained in:
Nate Begeman 2005-08-18 23:38:00 +00:00
parent 4bd805e785
commit 33acb2c135
1 changed files with 45 additions and 0 deletions
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45
llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
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@ -486,6 +486,51 @@ SDOperand PPC32DAGToDAGISel::Select(SDOperand Op) {
CurDAG->SelectNodeTo(N, MVT::i32, PPC::XOR, Select(N->getOperand(0)),
Select(N->getOperand(1)));
break;
case ISD::SHL: {
unsigned Imm, SH, MB, ME;
if (isOpcWithIntImmediate(N->getOperand(0).Val, ISD::AND, Imm) &&
isRotateAndMask(N, Imm, true, SH, MB, ME))
CurDAG->SelectNodeTo(N, MVT::i32, PPC::RLWINM,
Select(N->getOperand(0).getOperand(0)),
getI32Imm(SH), getI32Imm(MB), getI32Imm(ME));
else if (isIntImmediate(N->getOperand(1), Imm))
CurDAG->SelectNodeTo(N, MVT::i32, PPC::RLWINM, Select(N->getOperand(0)),
getI32Imm(Imm), getI32Imm(0), getI32Imm(31-Imm));
else
CurDAG->SelectNodeTo(N, MVT::i32, PPC::SLW, Select(N->getOperand(0)),
Select(N->getOperand(1)));
break;
}
case ISD::SRL: {
unsigned Imm, SH, MB, ME;
if (isOpcWithIntImmediate(N->getOperand(0).Val, ISD::AND, Imm) &&
isRotateAndMask(N, Imm, true, SH, MB, ME))
CurDAG->SelectNodeTo(N, MVT::i32, PPC::RLWINM,
Select(N->getOperand(0).getOperand(0)),
getI32Imm(SH), getI32Imm(MB), getI32Imm(ME));
else if (isIntImmediate(N->getOperand(1), Imm))
CurDAG->SelectNodeTo(N, MVT::i32, PPC::RLWINM, Select(N->getOperand(0)),
getI32Imm(32-Imm), getI32Imm(Imm), getI32Imm(31));
else
CurDAG->SelectNodeTo(N, MVT::i32, PPC::SRW, Select(N->getOperand(0)),
Select(N->getOperand(1)));
break;
}
case ISD::SRA: {
unsigned Imm, SH, MB, ME;
if (isOpcWithIntImmediate(N->getOperand(0).Val, ISD::AND, Imm) &&
isRotateAndMask(N, Imm, true, SH, MB, ME))
CurDAG->SelectNodeTo(N, MVT::i32, PPC::RLWINM,
Select(N->getOperand(0).getOperand(0)),
getI32Imm(SH), getI32Imm(MB), getI32Imm(ME));
else if (isIntImmediate(N->getOperand(1), Imm))
CurDAG->SelectNodeTo(N, MVT::i32, PPC::SRAWI, Select(N->getOperand(0)),
getI32Imm(Imm));
else
CurDAG->SelectNodeTo(N, MVT::i32, PPC::SRAW, Select(N->getOperand(0)),
Select(N->getOperand(1)));
break;
}
case ISD::FABS:
CurDAG->SelectNodeTo(N, N->getValueType(0), PPC::FABS,
Select(N->getOperand(0)));