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radeon/llvm: custom lowering for FP_TO_UINT when dst is i1 (bool)

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v2:-wrap line at 80 characters

Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
This commit is contained in:
Vincent Lejeune 2012-09-04 17:29:48 +02:00
parent d9e135e18c
commit a4325b3229
2 changed files with 26 additions and 2 deletions
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22
src/gallium/drivers/radeon/R600ISelLowering.cpp
View file

@ -48,6 +48,7 @@ R600TargetLowering::R600TargetLowering(TargetMachine &TM) :
setOperationAction(ISD::SETCC, MVT::i32, Custom);
setOperationAction(ISD::SETCC, MVT::f32, Custom);
setOperationAction(ISD::FP_TO_UINT, MVT::i1, Custom);
setSchedulingPreference(Sched::VLIW);
}
@ -330,6 +331,27 @@ SDValue R600TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const
return SDValue();
}
void R600TargetLowering::ReplaceNodeResults(SDNode *N,
SmallVectorImpl<SDValue> &Results,
SelectionDAG &DAG) const
{
switch (N->getOpcode()) {
default: return;
case ISD::FP_TO_UINT: Results.push_back(LowerFPTOUINT(N->getOperand(0), DAG));
}
}
SDValue R600TargetLowering::LowerFPTOUINT(SDValue Op, SelectionDAG &DAG) const
{
return DAG.getNode(
ISD::SETCC,
Op.getDebugLoc(),
MVT::i1,
Op, DAG.getConstantFP(0.0f, MVT::f32),
DAG.getCondCode(ISD::SETNE)
);
}
SDValue R600TargetLowering::LowerBR_CC(SDValue Op, SelectionDAG &DAG) const
{
SDValue Chain = Op.getOperand(0);

6
src/gallium/drivers/radeon/R600ISelLowering.h
View file

@ -27,7 +27,9 @@ public:
virtual MachineBasicBlock * EmitInstrWithCustomInserter(MachineInstr *MI,
MachineBasicBlock * BB) const;
virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;
void ReplaceNodeResults(SDNode * N,
SmallVectorImpl<SDValue> &Results,
SelectionDAG &DAG) const;
private:
const R600InstrInfo * TII;
@ -48,7 +50,7 @@ private:
SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerSETCC(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerFPTOUINT(SDValue Op, SelectionDAG &DAG) const;
};
} // End namespace llvm;