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Add support for lowering i64 SRA_PARTS and friends on x86-64. 

llvm-svn: 47865
This commit is contained in:
Dan Gohman 2008-03-03 22:22:09 +00:00
parent f2bbfa3ba0
commit a986eea82f
1 changed files with 22 additions and 16 deletions
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38
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -276,6 +276,11 @@ X86TargetLowering::X86TargetLowering(TargetMachine &TM)
setOperationAction(ISD::SHL_PARTS , MVT::i32 , Custom);
setOperationAction(ISD::SRA_PARTS , MVT::i32 , Custom);
setOperationAction(ISD::SRL_PARTS , MVT::i32 , Custom);
if (Subtarget->is64Bit()) {
setOperationAction(ISD::SHL_PARTS , MVT::i64 , Custom);
setOperationAction(ISD::SRA_PARTS , MVT::i64 , Custom);
setOperationAction(ISD::SRL_PARTS , MVT::i64 , Custom);
}
// X86 wants to expand memset / memcpy itself.
setOperationAction(ISD::MEMSET , MVT::Other, Custom);
setOperationAction(ISD::MEMCPY , MVT::Other, Custom);
@ -4087,64 +4092,65 @@ SDOperand X86TargetLowering::LowerJumpTable(SDOperand Op, SelectionDAG &DAG) {
/// LowerShift - Lower SRA_PARTS and friends, which return two i32 values and
/// take a 2 x i32 value to shift plus a shift amount.
SDOperand X86TargetLowering::LowerShift(SDOperand Op, SelectionDAG &DAG) {
assert(Op.getNumOperands() == 3 && Op.getValueType() == MVT::i32 &&
"Not an i64 shift!");
assert(Op.getNumOperands() == 3 && "Not a double-shift!");
MVT::ValueType VT = Op.getValueType();
unsigned VTBits = MVT::getSizeInBits(VT);
bool isSRA = Op.getOpcode() == ISD::SRA_PARTS;
SDOperand ShOpLo = Op.getOperand(0);
SDOperand ShOpHi = Op.getOperand(1);
SDOperand ShAmt = Op.getOperand(2);
SDOperand Tmp1 = isSRA ?
DAG.getNode(ISD::SRA, MVT::i32, ShOpHi, DAG.getConstant(31, MVT::i8)) :
DAG.getConstant(0, MVT::i32);
DAG.getNode(ISD::SRA, VT, ShOpHi, DAG.getConstant(VTBits - 1, MVT::i8)) :
DAG.getConstant(0, VT);
SDOperand Tmp2, Tmp3;
if (Op.getOpcode() == ISD::SHL_PARTS) {
Tmp2 = DAG.getNode(X86ISD::SHLD, MVT::i32, ShOpHi, ShOpLo, ShAmt);
Tmp3 = DAG.getNode(ISD::SHL, MVT::i32, ShOpLo, ShAmt);
Tmp2 = DAG.getNode(X86ISD::SHLD, VT, ShOpHi, ShOpLo, ShAmt);
Tmp3 = DAG.getNode(ISD::SHL, VT, ShOpLo, ShAmt);
} else {
Tmp2 = DAG.getNode(X86ISD::SHRD, MVT::i32, ShOpLo, ShOpHi, ShAmt);
Tmp3 = DAG.getNode(isSRA ? ISD::SRA : ISD::SRL, MVT::i32, ShOpHi, ShAmt);
Tmp2 = DAG.getNode(X86ISD::SHRD, VT, ShOpLo, ShOpHi, ShAmt);
Tmp3 = DAG.getNode(isSRA ? ISD::SRA : ISD::SRL, VT, ShOpHi, ShAmt);
}
const MVT::ValueType *VTs = DAG.getNodeValueTypes(MVT::Other, MVT::Flag);
SDOperand AndNode = DAG.getNode(ISD::AND, MVT::i8, ShAmt,
DAG.getConstant(32, MVT::i8));
SDOperand Cond = DAG.getNode(X86ISD::CMP, MVT::i32,
DAG.getConstant(VTBits, MVT::i8));
SDOperand Cond = DAG.getNode(X86ISD::CMP, VT,
AndNode, DAG.getConstant(0, MVT::i8));
SDOperand Hi, Lo;
SDOperand CC = DAG.getConstant(X86::COND_NE, MVT::i8);
VTs = DAG.getNodeValueTypes(MVT::i32, MVT::Flag);
VTs = DAG.getNodeValueTypes(VT, MVT::Flag);
SmallVector<SDOperand, 4> Ops;
if (Op.getOpcode() == ISD::SHL_PARTS) {
Ops.push_back(Tmp2);
Ops.push_back(Tmp3);
Ops.push_back(CC);
Ops.push_back(Cond);
Hi = DAG.getNode(X86ISD::CMOV, MVT::i32, &Ops[0], Ops.size());
Hi = DAG.getNode(X86ISD::CMOV, VT, &Ops[0], Ops.size());
Ops.clear();
Ops.push_back(Tmp3);
Ops.push_back(Tmp1);
Ops.push_back(CC);
Ops.push_back(Cond);
Lo = DAG.getNode(X86ISD::CMOV, MVT::i32, &Ops[0], Ops.size());
Lo = DAG.getNode(X86ISD::CMOV, VT, &Ops[0], Ops.size());
} else {
Ops.push_back(Tmp2);
Ops.push_back(Tmp3);
Ops.push_back(CC);
Ops.push_back(Cond);
Lo = DAG.getNode(X86ISD::CMOV, MVT::i32, &Ops[0], Ops.size());
Lo = DAG.getNode(X86ISD::CMOV, VT, &Ops[0], Ops.size());
Ops.clear();
Ops.push_back(Tmp3);
Ops.push_back(Tmp1);
Ops.push_back(CC);
Ops.push_back(Cond);
Hi = DAG.getNode(X86ISD::CMOV, MVT::i32, &Ops[0], Ops.size());
Hi = DAG.getNode(X86ISD::CMOV, VT, &Ops[0], Ops.size());
}
VTs = DAG.getNodeValueTypes(MVT::i32, MVT::i32);
VTs = DAG.getNodeValueTypes(VT, VT);
Ops.clear();
Ops.push_back(Lo);
Ops.push_back(Hi);