COMPMID-2307: QUANTIZED_16BIT_LSTM operator for CL

Change-Id: I1b52df359f1a368d585fac43a08496544dd2f86f
Signed-off-by: Manuel Bottini <manuel.bottini@arm.com>
Reviewed-on: https://review.mlplatform.org/c/1568
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Giuseppe Rossini <giuseppe.rossini@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/runtime/CL/functions/CLConcatenateLayer.h b/arm_compute/runtime/CL/functions/CLConcatenateLayer.h
index b69930c..fb9724d 100644
--- a/arm_compute/runtime/CL/functions/CLConcatenateLayer.h
+++ b/arm_compute/runtime/CL/functions/CLConcatenateLayer.h
@@ -60,7 +60,8 @@
      * @param[out]    output        Output tensor. Data types supported: Same as @p input.
      * @param[in]     axis          Concatenation axis. Supported underlying concatenation axis are 0, 1, 2 and 3.
      */
-    void configure(const std::vector<ICLTensor *> &inputs_vector, ICLTensor *output, size_t axis);
+    void configure(std::vector<ICLTensor *> &inputs_vector, ICLTensor *output, size_t axis);
+    void configure(std::vector<const ICLTensor *> &inputs_vector, ICLTensor *output, size_t axis);
     /** Static function to check if given info will lead to a valid configuration of @ref CLConcatenateLayer
      *
      * @note Input and output tensor dimensions preconditions defer depending on the concatenation axis.
@@ -73,11 +74,18 @@
      * @return a status
      */
     static Status validate(const std::vector<ITensorInfo *> &inputs_vector, const ITensorInfo *output, size_t axis);
+    static Status validate(const std::vector<const ITensorInfo *> &inputs_vector, const ITensorInfo *output, size_t axis);
 
     // Inherited methods overridden:
     void run() override;
 
 private:
+    template <typename TensorType>
+    void configure_internal(std::vector<TensorType *> &&inputs_vector, ICLTensor *output, size_t axis);
+
+    template <typename TensorInfoType>
+    static Status validate_internal(const std::vector<TensorInfoType *> &inputs_vector, const ITensorInfo *output, size_t axis);
+
     std::vector<std::unique_ptr<ICLKernel>> _concat_kernels;
     unsigned int                            _num_inputs;
     unsigned int                            _axis;