added support for rcp for float and double

Change-Id: Ibeba3a9f64494fc0a176bcb4a854fb2f56567b55


[ROCm/clr commit: de89b25d52]

projects/clr/hipamd/tests/src/deviceLib/hipDoublePrecisionIntrinsics.cpp

@@ -39,10 +39,10 @@ __device__ void double_precision_intrinsics()
     //__dmul_rn(1.0, 2.0);
     //__dmul_ru(1.0, 2.0);
     //__dmul_rz(1.0, 2.0);
-    //__drcp_rd(2.0);
-    //__drcp_rn(2.0);
-    //__drcp_ru(2.0);
-    //__drcp_rz(2.0);
+    __drcp_rd(2.0);
+    __drcp_rn(2.0);
+    __drcp_ru(2.0);
+    __drcp_rz(2.0);
     __dsqrt_rd(4.0);
     __dsqrt_rn(4.0);
     __dsqrt_ru(4.0);