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


[ROCm/clr commit: fe38e9652b]

projects/clr/hipamd/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){