AMDGPU: Implement f16 fround

llvm-svn: 298730
diff --git a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
index 14797da..5673434 100644
--- a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
@@ -365,6 +365,7 @@
     setOperationAction(ISD::FP_TO_UINT, MVT::f16, Promote);
     setOperationAction(ISD::SINT_TO_FP, MVT::f16, Promote);
     setOperationAction(ISD::UINT_TO_FP, MVT::f16, Promote);
+    setOperationAction(ISD::FROUND, MVT::f16, Custom);
 
     // F16 - VOP2 Actions.
     setOperationAction(ISD::BR_CC, MVT::f16, Expand);