COMPMID-727 - Implement reference and CL/NEON validation for CustomConvolutionRectangle

Change-Id: I108a48ad5e6dc3f331fd5ceb38ced8ccdb31d81a
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/113130
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
diff --git a/tests/validation/Validation.h b/tests/validation/Validation.h
index 1f81d38..b12d7de 100644
--- a/tests/validation/Validation.h
+++ b/tests/validation/Validation.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017 ARM Limited.
+ * Copyright (c) 2017, 2018 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -163,6 +163,12 @@
  */
 void validate(const arm_compute::PaddingSize &padding, const arm_compute::PaddingSize &reference);
 
+/** Validate padding.
+ *
+ * Padding on all sides has to be the same.
+ */
+void validate(const arm_compute::PaddingSize &padding, const arm_compute::PaddingSize &width_reference, const arm_compute::PaddingSize &height_reference);
+
 /** Validate tensors.
  *
  * - Dimensionality has to be the same.