diff --git a/arm_compute/core/CL/CLHelpers.h b/arm_compute/core/CL/CLHelpers.h
index 4c9cfff..4b9ca4d 100644
--- a/arm_compute/core/CL/CLHelpers.h
+++ b/arm_compute/core/CL/CLHelpers.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2019 ARM Limited.
+ * Copyright (c) 2016-2020 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -66,6 +66,14 @@
  */
 std::string get_cl_unsigned_type_from_element_size(size_t element_size);
 
+/** Translates the element size to an signed integer data type
+ *
+ * @param[in] element_size Size in bytes of an element.
+ *
+ * @return The string specifying the OpenCL type to be used.
+ */
+std::string get_cl_signed_type_from_element_size(size_t element_size);
+
 /** Translates a tensor data type to the appropriate OpenCL select type.
  *
  * @param[in] dt @ref DataType to be translated to OpenCL select type.
diff --git a/arm_compute/runtime/CL/functions/CLArgMinMaxLayer.h b/arm_compute/runtime/CL/functions/CLArgMinMaxLayer.h
index 21cded0..a26fcfd 100644
--- a/arm_compute/runtime/CL/functions/CLArgMinMaxLayer.h
+++ b/arm_compute/runtime/CL/functions/CLArgMinMaxLayer.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019 ARM Limited.
+ * Copyright (c) 2018-2020 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -55,7 +55,7 @@
     CLArgMinMaxLayer(std::shared_ptr<IMemoryManager> memory_manager = nullptr);
     /** Set the input and output tensors.
      *
-     * @param[in]  input  Input source tensor. Data types supported: F16/F32.
+     * @param[in]  input  Input source tensor. Data types supported: QASYMM8/F16/F32.
      * @param[in]  axis   Axis to find max/min index.
      * @param[out] output Output source tensor. Data types supported: U32/S32.
      * @param[in]  op     Reduction operation to perform. Operations supported: ARG_IDX_MAX, ARG_IDX_MIN
@@ -63,7 +63,7 @@
     void configure(const ICLTensor *input, int axis, ICLTensor *output, const ReductionOperation &op);
     /** Static function to check if given info will lead to a valid configuration of @ref CLArgMinMaxLayer
      *
-     * @param[in] input  Input source tensor info. Data types supported: F16/F32.
+     * @param[in] input  Input source tensor info. Data types supported: QASYMM8/F16/F32.
      * @param[in] axis   Axis to find max/min index.
      * @param[in] output Output source tensor info. Data types supported: U32/S32.
      * @param[in] op     Reduction operation to perform. Operations supported: ARG_IDX_MAX, ARG_IDX_MIN