added fast math APIs

1. Added fast math apis for sin, cos, tan, sincos
2. Added test for trig math functions
3. Added logarithm fast math
4. Changed how hipGetDevice, hipDeviceGetCacheConfig emit errors

Change-Id: Ie6ab594ddd5853cbe85e39a2f6d3479a807fa323


[ROCm/hip commit: 94d2115d6d]

projects/hip/src/hip_device.cpp

@@ -44,7 +44,7 @@ hipError_t hipGetDevice(int *deviceId)
             *deviceId = ctx->getDevice()->_deviceId;
         }
     }else{
-        e = hipErrorInvalidDevice;
+        e = hipErrorInvalidValue;
     }
 
     return ihipLogStatus(e);
@@ -66,7 +66,7 @@ hipError_t hipGetDeviceCount(int *count)
             e = ihipLogStatus(hipErrorNoDevice);
         }
     } else {
-        e = ihipLogStatus(hipErrorNoDevice);
+        e = ihipLogStatus(hipErrorInvalidValue);
     }
     return e;
 }
@@ -84,6 +84,10 @@ hipError_t hipDeviceGetCacheConfig(hipFuncCache_t *cacheConfig)
 {
     HIP_INIT_API(cacheConfig);
 
+    if(cacheConfig == nullptr) {
+        return ihipLogStatus(hipErrorInvalidValue);
+    }
+
     *cacheConfig = hipFuncCachePreferNone;
 
     return ihipLogStatus(hipSuccess);