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[mips] Define function MipsSEDAGToDAGISel::selectAddESubE.

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No intended functionality changes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177095 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka 2013-03-14 18:39:25 +00:00
parent 6bc99603c0
commit 275f354d6d
2 changed files with 31 additions and 31 deletions
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59
lib/Target/Mips/MipsSEISelDAGToDAG.cpp
View File

@ -198,6 +198,26 @@ MipsSEDAGToDAGISel::selectMULT(SDNode *N, unsigned Opc, DebugLoc DL, EVT Ty,
return std::make_pair(Lo, Hi);
}
SDNode *MipsSEDAGToDAGISel::selectAddESubE(unsigned MOp, SDValue InFlag,
SDValue CmpLHS, DebugLoc DL,
SDNode *Node) const {
unsigned Opc = InFlag.getOpcode(); (void)Opc;
assert(((Opc == ISD::ADDC || Opc == ISD::ADDE) ||
(Opc == ISD::SUBC || Opc == ISD::SUBE)) &&
"(ADD|SUB)E flag operand must come from (ADD|SUB)C/E insn");
SDValue Ops[] = { CmpLHS, InFlag.getOperand(1) };
SDValue LHS = Node->getOperand(0), RHS = Node->getOperand(1);
EVT VT = LHS.getValueType();
SDNode *Carry = CurDAG->getMachineNode(Mips::SLTu, DL, VT, Ops, 2);
SDNode *AddCarry = CurDAG->getMachineNode(Mips::ADDu, DL, VT,
SDValue(Carry, 0), RHS);
return CurDAG->SelectNodeTo(Node, MOp, VT, MVT::Glue, LHS,
SDValue(AddCarry, 0));
}
/// ComplexPattern used on MipsInstrInfo
/// Used on Mips Load/Store instructions
bool MipsSEDAGToDAGISel::selectAddrRegImm(SDValue Addr, SDValue &Base,
@ -294,38 +314,15 @@ std::pair<bool, SDNode*> MipsSEDAGToDAGISel::selectNode(SDNode *Node) {
switch(Opcode) {
default: break;
case ISD::SUBE:
case ISD::SUBE: {
SDValue InFlag = Node->getOperand(2);
Result = selectAddESubE(Mips::SUBu, InFlag, InFlag.getOperand(0), DL, Node);
return std::make_pair(true, Result);
}
case ISD::ADDE: {
SDValue InFlag = Node->getOperand(2), CmpLHS;
unsigned Opc = InFlag.getOpcode(); (void)Opc;
assert(((Opc == ISD::ADDC || Opc == ISD::ADDE) ||
(Opc == ISD::SUBC || Opc == ISD::SUBE)) &&
"(ADD|SUB)E flag operand must come from (ADD|SUB)C/E insn");
unsigned MOp;
if (Opcode == ISD::ADDE) {
CmpLHS = InFlag.getValue(0);
MOp = Mips::ADDu;
} else {
CmpLHS = InFlag.getOperand(0);
MOp = Mips::SUBu;
}
SDValue Ops[] = { CmpLHS, InFlag.getOperand(1) };
SDValue LHS = Node->getOperand(0);
SDValue RHS = Node->getOperand(1);
EVT VT = LHS.getValueType();
unsigned Sltu_op = Mips::SLTu;
SDNode *Carry = CurDAG->getMachineNode(Sltu_op, DL, VT, Ops, 2);
unsigned Addu_op = Mips::ADDu;
SDNode *AddCarry = CurDAG->getMachineNode(Addu_op, DL, VT,
SDValue(Carry,0), RHS);
Result = CurDAG->SelectNodeTo(Node, MOp, VT, MVT::Glue, LHS,
SDValue(AddCarry,0));
SDValue InFlag = Node->getOperand(2);
Result = selectAddESubE(Mips::ADDu, InFlag, InFlag.getValue(0), DL, Node);
return std::make_pair(true, Result);
}

3
lib/Target/Mips/MipsSEISelDAGToDAG.h
View File

@ -29,6 +29,9 @@ private:
std::pair<SDNode*, SDNode*> selectMULT(SDNode *N, unsigned Opc, DebugLoc dl,
EVT Ty, bool HasLo, bool HasHi);
SDNode *selectAddESubE(unsigned MOp, SDValue InFlag, SDValue CmpLHS,
DebugLoc DL, SDNode *Node) const;
virtual bool selectAddrRegImm(SDValue Addr, SDValue &Base,
SDValue &Offset) const;