-
-SDValue MipsTargetLowering::
-LowerFP_TO_SINT(SDValue Op, SelectionDAG &DAG) const
-{
- if (!Subtarget->isMips1())
- return Op;
-
- MachineFunction &MF = DAG.getMachineFunction();
- unsigned CCReg = AddLiveIn(MF, Mips::FCR31, Mips::CCRRegisterClass);
-
- SDValue Chain = DAG.getEntryNode();
- DebugLoc dl = Op.getDebugLoc();
- SDValue Src = Op.getOperand(0);
-
- // Set the condition register
- SDValue CondReg = DAG.getCopyFromReg(Chain, dl, CCReg, MVT::i32);
- CondReg = DAG.getCopyToReg(Chain, dl, Mips::AT, CondReg);
- CondReg = DAG.getCopyFromReg(CondReg, dl, Mips::AT, MVT::i32);
-
- SDValue Cst = DAG.getConstant(3, MVT::i32);
- SDValue Or = DAG.getNode(ISD::OR, dl, MVT::i32, CondReg, Cst);
- Cst = DAG.getConstant(2, MVT::i32);
- SDValue Xor = DAG.getNode(ISD::XOR, dl, MVT::i32, Or, Cst);
-
- SDValue InFlag(0, 0);
- CondReg = DAG.getCopyToReg(Chain, dl, Mips::FCR31, Xor, InFlag);
-
- // Emit the round instruction and bit convert to integer
- SDValue Trunc = DAG.getNode(MipsISD::FPRound, dl, MVT::f32,
- Src, CondReg.getValue(1));
- SDValue BitCvt = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Trunc);
- return BitCvt;
-}
-