[Mesa-dev] [PATCH] radeon/llvm: custom lowering for FP_TO_UINT when dst is i1 (bool)
Vincent Lejeune
vljn at ovi.com
Tue Sep 4 08:29:48 PDT 2012
v2:-wrap line at 80 characters
---
src/gallium/drivers/radeon/R600ISelLowering.cpp | 22 ++++++++++++++++++++++
src/gallium/drivers/radeon/R600ISelLowering.h | 6 ++++--
2 files changed, 26 insertions(+), 2 deletions(-)
diff --git a/src/gallium/drivers/radeon/R600ISelLowering.cpp b/src/gallium/drivers/radeon/R600ISelLowering.cpp
index 2bab51c..261cfa4 100644
--- a/src/gallium/drivers/radeon/R600ISelLowering.cpp
+++ b/src/gallium/drivers/radeon/R600ISelLowering.cpp
@@ -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);
diff --git a/src/gallium/drivers/radeon/R600ISelLowering.h b/src/gallium/drivers/radeon/R600ISelLowering.h
index 2eb7edd..49ea272 100644
--- a/src/gallium/drivers/radeon/R600ISelLowering.h
+++ b/src/gallium/drivers/radeon/R600ISelLowering.h
@@ -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;
--
1.7.11.4
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