Add substarget feature for FP16

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98503 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index d37a36e..ac21068 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -436,7 +436,7 @@
       setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
     }
     // Special handling for half-precision FP.
-    if (Subtarget->hasVFP3()) {
+    if (Subtarget->hasVFP3() && Subtarget->hasFP16()) {
       setOperationAction(ISD::FP16_TO_FP32, MVT::f32, Custom);
       setOperationAction(ISD::FP32_TO_FP16, MVT::i32, Custom);
     }