COMPMID-2255: Implement ABS operator for CL

Change-Id: I8867953f8ae84a77f126aedd32b2f98c062905b1
Signed-off-by: giuros01 <giuseppe.rossini@arm.com>
Reviewed-on: https://review.mlplatform.org/c/1151
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
diff --git a/src/core/CL/kernels/CLElementWiseUnaryLayerKernel.cpp b/src/core/CL/kernels/CLElementWiseUnaryLayerKernel.cpp
index b6484ec..15823b0 100644
--- a/src/core/CL/kernels/CLElementWiseUnaryLayerKernel.cpp
+++ b/src/core/CL/kernels/CLElementWiseUnaryLayerKernel.cpp
@@ -79,16 +79,19 @@
     switch(op)
     {
         case ElementWiseUnary::RSQRT:
-            build_opts.add_option("-DOPERATION=inverse_sqrt");
+            build_opts.add_option("-DOPERATION=rsqrt_op");
             break;
         case ElementWiseUnary::EXP:
-            build_opts.add_option("-DOPERATION=exponential");
+            build_opts.add_option("-DOPERATION=exp_op");
             break;
         case ElementWiseUnary::NEG:
-            build_opts.add_option("-DOPERATION=neg");
+            build_opts.add_option("-DOPERATION=neg_op");
             break;
         case ElementWiseUnary::SIN:
-            build_opts.add_option("-DOPERATION=sine");
+            build_opts.add_option("-DOPERATION=sin_op");
+            break;
+        case ElementWiseUnary::ABS:
+            build_opts.add_option("-DOPERATION=fabs_op");
             break;
         default:
             ARM_COMPUTE_ERROR("Not implemented");