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[mips] Fix definitions of multiply, multiply-add/sub and divide instructions.

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The new instructions have explicit register output operands and use table-gen
patterns instead of C++ code to do instruction selection.

Mips16's instructions are unaffected by this change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178403 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka
2013-03-30 01:36:35 +00:00
parent 9cf0724cc3
commit f5926fd844
7 changed files with 199 additions and 70 deletions
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70
lib/Target/Mips/MipsISelLowering.cpp
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@@ -461,28 +461,32 @@ static bool selectMADD(SDNode *ADDENode, SelectionDAG *CurDAG) {
SDValue Chain = CurDAG->getEntryNode();
DebugLoc DL = ADDENode->getDebugLoc();
// Initialize accumulator.
SDValue ACCIn = CurDAG->getNode(MipsISD::InsertLOHI, DL, MVT::Untyped,
ADDCNode->getOperand(1),
ADDENode->getOperand(1));
// create MipsMAdd(u) node
MultOpc = MultOpc == ISD::UMUL_LOHI ? MipsISD::MAddu : MipsISD::MAdd;
SDValue MAdd = CurDAG->getNode(MultOpc, DL, MVT::Glue,
SDValue MAdd = CurDAG->getNode(MultOpc, DL, MVT::Untyped,
MultNode->getOperand(0),// Factor 0
MultNode->getOperand(1),// Factor 1
ADDCNode->getOperand(1),// Lo0
ADDENode->getOperand(1));// Hi0
// create CopyFromReg nodes
SDValue CopyFromLo = CurDAG->getCopyFromReg(Chain, DL, Mips::LO, MVT::i32,
MAdd);
SDValue CopyFromHi = CurDAG->getCopyFromReg(CopyFromLo.getValue(1), DL,
Mips::HI, MVT::i32,
CopyFromLo.getValue(2));
ACCIn);
// replace uses of adde and addc here
if (!SDValue(ADDCNode, 0).use_empty())
CurDAG->ReplaceAllUsesOfValueWith(SDValue(ADDCNode, 0), CopyFromLo);
if (!SDValue(ADDENode, 0).use_empty())
CurDAG->ReplaceAllUsesOfValueWith(SDValue(ADDENode, 0), CopyFromHi);
if (!SDValue(ADDCNode, 0).use_empty()) {
SDValue LoIdx = CurDAG->getConstant(Mips::sub_lo, MVT::i32);
SDValue LoOut = CurDAG->getNode(MipsISD::ExtractLOHI, DL, MVT::i32, MAdd,
LoIdx);
CurDAG->ReplaceAllUsesOfValueWith(SDValue(ADDCNode, 0), LoOut);
}
if (!SDValue(ADDENode, 0).use_empty()) {
SDValue HiIdx = CurDAG->getConstant(Mips::sub_hi, MVT::i32);
SDValue HiOut = CurDAG->getNode(MipsISD::ExtractLOHI, DL, MVT::i32, MAdd,
HiIdx);
CurDAG->ReplaceAllUsesOfValueWith(SDValue(ADDENode, 0), HiOut);
}
return true;
}
@@ -534,28 +538,32 @@ static bool selectMSUB(SDNode *SUBENode, SelectionDAG *CurDAG) {
SDValue Chain = CurDAG->getEntryNode();
DebugLoc DL = SUBENode->getDebugLoc();
// Initialize accumulator.
SDValue ACCIn = CurDAG->getNode(MipsISD::InsertLOHI, DL, MVT::Untyped,
SUBCNode->getOperand(0),
SUBENode->getOperand(0));
// create MipsSub(u) node
MultOpc = MultOpc == ISD::UMUL_LOHI ? MipsISD::MSubu : MipsISD::MSub;
SDValue MSub = CurDAG->getNode(MultOpc, DL, MVT::Glue,
MultNode->getOperand(0),// Factor 0
MultNode->getOperand(1),// Factor 1
SUBCNode->getOperand(0),// Lo0
SUBENode->getOperand(0));// Hi0
// create CopyFromReg nodes
SDValue CopyFromLo = CurDAG->getCopyFromReg(Chain, DL, Mips::LO, MVT::i32,
MSub);
SDValue CopyFromHi = CurDAG->getCopyFromReg(CopyFromLo.getValue(1), DL,
Mips::HI, MVT::i32,
CopyFromLo.getValue(2));
ACCIn);
// replace uses of sube and subc here
if (!SDValue(SUBCNode, 0).use_empty())
CurDAG->ReplaceAllUsesOfValueWith(SDValue(SUBCNode, 0), CopyFromLo);
if (!SDValue(SUBENode, 0).use_empty())
CurDAG->ReplaceAllUsesOfValueWith(SDValue(SUBENode, 0), CopyFromHi);
if (!SDValue(SUBCNode, 0).use_empty()) {
SDValue LoIdx = CurDAG->getConstant(Mips::sub_lo, MVT::i32);
SDValue LoOut = CurDAG->getNode(MipsISD::ExtractLOHI, DL, MVT::i32, MSub,
LoIdx);
CurDAG->ReplaceAllUsesOfValueWith(SDValue(SUBCNode, 0), LoOut);
}
if (!SDValue(SUBENode, 0).use_empty()) {
SDValue HiIdx = CurDAG->getConstant(Mips::sub_hi, MVT::i32);
SDValue HiOut = CurDAG->getNode(MipsISD::ExtractLOHI, DL, MVT::i32, MSub,
HiIdx);
CurDAG->ReplaceAllUsesOfValueWith(SDValue(SUBENode, 0), HiOut);
}
return true;
}
@@ -595,8 +603,8 @@ static SDValue performDivRemCombine(SDNode *N, SelectionDAG &DAG,
EVT Ty = N->getValueType(0);
unsigned LO = (Ty == MVT::i32) ? Mips::LO : Mips::LO64;
unsigned HI = (Ty == MVT::i32) ? Mips::HI : Mips::HI64;
unsigned Opc = N->getOpcode() == ISD::SDIVREM ? MipsISD::DivRem :
MipsISD::DivRemU;
unsigned Opc = N->getOpcode() == ISD::SDIVREM ? MipsISD::DivRem16 :
MipsISD::DivRemU16;
DebugLoc DL = N->getDebugLoc();
SDValue DivRem = DAG.getNode(Opc, DL, MVT::Glue,