diff options
Diffstat (limited to 'src/gallium/drivers/radeon/AMDGPUISelLowering.cpp')
| -rw-r--r-- | src/gallium/drivers/radeon/AMDGPUISelLowering.cpp | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/gallium/drivers/radeon/AMDGPUISelLowering.cpp b/src/gallium/drivers/radeon/AMDGPUISelLowering.cpp index 53f04c57de1..0417273d971 100644 --- a/src/gallium/drivers/radeon/AMDGPUISelLowering.cpp +++ b/src/gallium/drivers/radeon/AMDGPUISelLowering.cpp @@ -45,6 +45,8 @@ SDValue AMDGPUTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, default: return Op; case AMDGPUIntrinsic::AMDIL_abs: return LowerIntrinsicIABS(Op, DAG); + case AMDGPUIntrinsic::AMDGPU_lrp: + return LowerIntrinsicLRP(Op, DAG); case AMDGPUIntrinsic::AMDIL_mad: return DAG.getNode(AMDILISD::MAD, DL, VT, Op.getOperand(1), Op.getOperand(2), Op.getOperand(3)); @@ -73,6 +75,22 @@ SDValue AMDGPUTargetLowering::LowerIntrinsicIABS(SDValue Op, return DAG.getNode(AMDGPUISD::SMAX, DL, VT, Neg, Op.getOperand(1)); } +/// Linear Interpolation +/// LRP(a, b, c) = muladd(a, b, (1 - a) * c) +SDValue AMDGPUTargetLowering::LowerIntrinsicLRP(SDValue Op, + SelectionDAG &DAG) const +{ + DebugLoc DL = Op.getDebugLoc(); + EVT VT = Op.getValueType(); + SDValue OneSubA = DAG.getNode(ISD::FSUB, DL, VT, DAG.getConstant(1, VT), + Op.getOperand(1)); + SDValue OneSubAC = DAG.getNode(ISD::FMUL, DL, VT, OneSubA, + Op.getOperand(3)); + return DAG.getNode(AMDILISD::MAD, DL, VT, Op.getOperand(1), + Op.getOperand(2), + OneSubAC); +} + void AMDGPUTargetLowering::addLiveIn(MachineInstr * MI, MachineFunction * MF, MachineRegisterInfo & MRI, const TargetInstrInfo * TII, unsigned reg) const |