added math functions for half

1. Added math functions for half precision
2. HRCP is not available due to device code linking errors, will be enabled once it is fixed
3. Added math functions to half test file

Change-Id: Ie317ce70ef518a4fc3f27142143d01e0327f5df3

tests/src/deviceLib/hipTestHalf.cpp

@@ -60,6 +60,21 @@ __global__ void CheckHalf(hipLaunchParm lp, __half* In1, __half* In2, __half* In
   Out[7] = __hsub(In1[7], In2[7]);
   Out[8] = __hsub_sat(In1[8], In2[8]);
   Out[9] = hdiv(In1[9], In2[9]);
+  Out[10] = hceil(In1[10]);
+  Out[11] = hcos(In1[11]);
+  Out[12] = hexp(In1[12]);
+  Out[13] = hexp10(In1[13]);
+  Out[14] = hexp2(In1[14]);
+  Out[15] = hfloor(In1[15]);
+  Out[16] = hlog(In1[16]);
+  Out[17] = hlog10(In1[17]);
+  Out[18] = hlog2(In1[18]);
+//  Out[19] = hrcp(In1[19]);
+  Out[20] = hrint(In1[20]);
+  Out[21] = hrsqrt(In1[21]);
+  Out[22] = hsin(In1[22]);
+  Out[23] = hsqrt(In1[23]);
+  Out[24] = htrunc(In1[24]);
 }
 
 __global__ void CheckHalf2(hipLaunchParm lp, __half2* In1, __half2* In2, __half2* In3, __half2* Out){