From: Tom Stellard <thomas.stellard@amd.com>
Date: Thu, 19 Jul 2012 17:28:25 +0000 (-0400)
Subject: radeon/llvm: Add custom lowering for SELECT_CC nodes on SI
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4cab682184640242d1e6f034f2b6bd7c4378c162;p=mesa.git

radeon/llvm: Add custom lowering for SELECT_CC nodes on SI
---

diff --git a/src/gallium/drivers/radeon/SIISelLowering.cpp b/src/gallium/drivers/radeon/SIISelLowering.cpp
index 11f79b9927a..79400851470 100644
--- a/src/gallium/drivers/radeon/SIISelLowering.cpp
+++ b/src/gallium/drivers/radeon/SIISelLowering.cpp
@@ -37,6 +37,11 @@ SITargetLowering::SITargetLowering(TargetMachine &TM) :
   setOperationAction(ISD::ADD, MVT::i32, Legal);
 
   setOperationAction(ISD::BR_CC, MVT::i32, Custom);
+
+  setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
+  setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
+
+  setOperationAction(ISD::SELECT_CC, MVT::Other, Expand);
 }
 
 MachineBasicBlock * SITargetLowering::EmitInstrWithCustomInserter(
@@ -208,6 +213,7 @@ SDValue SITargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const
   switch (Op.getOpcode()) {
   default: return AMDGPUTargetLowering::LowerOperation(Op, DAG);
   case ISD::BR_CC: return LowerBR_CC(Op, DAG);
+  case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
   }
 }
 
@@ -235,3 +241,16 @@ SDValue SITargetLowering::LowerBR_CC(SDValue Op, SelectionDAG &DAG) const
   return Result;
 }
 
+SDValue SITargetLowering::LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const
+{
+  SDValue LHS = Op.getOperand(0);
+  SDValue RHS = Op.getOperand(1);
+  SDValue True = Op.getOperand(2);
+  SDValue False = Op.getOperand(3);
+  SDValue CC = Op.getOperand(4);
+  EVT VT = Op.getValueType();
+  DebugLoc DL = Op.getDebugLoc();
+
+  SDValue Cond = DAG.getNode(ISD::SETCC, DL, MVT::i1, LHS, RHS, CC);
+  return DAG.getNode(ISD::SELECT, DL, VT, Cond, True, False);
+}
diff --git a/src/gallium/drivers/radeon/SIISelLowering.h b/src/gallium/drivers/radeon/SIISelLowering.h
index 952e0253149..f16202abcc5 100644
--- a/src/gallium/drivers/radeon/SIISelLowering.h
+++ b/src/gallium/drivers/radeon/SIISelLowering.h
@@ -39,6 +39,7 @@ class SITargetLowering : public AMDGPUTargetLowering
                      MachineRegisterInfo & MRI) const;
 
   SDValue LowerBR_CC(SDValue Op, SelectionDAG &DAG) const;
+  SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const;
 
 public:
   SITargetLowering(TargetMachine &tm);