COMPMID-1719 CL: Implement RSqrt, Exp

Change-Id: I827b26239043a9e90d26c2583122648d2a45303a
Reviewed-on: https://review.mlplatform.org/317
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/core/Types.h b/arm_compute/core/Types.h
index d46c932..6833a66 100644
--- a/arm_compute/core/Types.h
+++ b/arm_compute/core/Types.h
@@ -563,6 +563,13 @@
     SQUARED_DIFF, /**< (x - y)^2 */
 };
 
+/** Available element wise unary operations */
+enum class ElementWiseUnary
+{
+    RSQRT, /**< Reverse square root */
+    EXP,   /**< Exponential */
+};
+
 /** The normalization type used for the normalization layer */
 enum class NormType
 {