Added Qasymm8 datatype support to NEROIPoolingLayer with Tests

Tests added to check ROIPooling Layer against reference with both Float32 and Qasymm8 input.
Resolves : COMPMID-2319

Change-Id: I867bc4dde1e3e91f9f42f4a7ce8debfe83b8db50
Signed-off-by: Mohammed Suhail Munshi <MohammedSuhail.Munshi@arm.com>
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/c/VisualCompute/ComputeLibrary/+/296640
Tested-by: bsgcomp <bsgcomp@arm.com>
Reviewed-by: Pablo Tello <pablo.tello@arm.com>
Comments-Addressed: Pablo Tello <pablo.tello@arm.com>
Signed-off-by: Suhail Munshi <MohammedSuhail.Munshi@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/5060
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Pablo Marquez Tello <pablo.tello@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/src/core/NEON/kernels/NEROIPoolingLayerKernel.h b/src/core/NEON/kernels/NEROIPoolingLayerKernel.h
index 3642417..2fcdb81 100644
--- a/src/core/NEON/kernels/NEROIPoolingLayerKernel.h
+++ b/src/core/NEON/kernels/NEROIPoolingLayerKernel.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2020 Arm Limited.
+ * Copyright (c) 2017-2021 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -55,7 +55,7 @@
 
     /** Set the input and output tensors.
      *
-     * @param[in]  input     Source tensor. Data types supported: F32.
+     * @param[in]  input     Source tensor. Data types supported: QASYMM8/F32
      * @param[in]  rois      ROIs tensor, it is a 2D tensor of size [5, N] (where N is the number of ROIs) containing top left and bottom right corner
      *                       as coordinate of an image and batch_id of ROI [ batch_id, x1, y1, x2, y2 ]. Data types supported: U16
      * @param[out] output    Destination tensor. Data types supported: Same as @p input.
@@ -66,15 +66,31 @@
      * @note The z dimensions of @p output tensor and @p input tensor must be the same.
      * @note The fourth dimension of @p output tensor must be the same as the number of elements in @p rois tensor.
      */
-    void configure(const ITensor *input, const ITensor *rois, ITensor *output, const ROIPoolingLayerInfo &pool_info);
+    void configure(const ITensor *input, const ITensor *rois, const ITensor *output, const ROIPoolingLayerInfo &pool_info);
 
     // Inherited methods overridden:
     void run(const Window &window, const ThreadInfo &info) override;
 
+    /** Static function to check if given info will lead to a valid configuration of @ref NEROIPoolingLayerKernel
+     *
+     * @param[in] input     Source tensor info. Data types supported: QASYMM8/F32.
+     * @param[in] rois      ROIs tensor info. Data types supported: U16
+     * @param[in] output    Destination tensor info. Data types supported: Same as @p input.
+     * @param[in] pool_info Contains pooling operation information described in @ref ROIPoolingLayerInfo.
+     *
+     * @note The x and y dimensions of @p output tensor must be the same as @p pool_info 's pooled
+     * width and pooled height.
+     * @note The datatype of @p output should be the same as the datatype of @p input
+     * @note The fourth dimension of @p output tensor must be the same as the number of elements in @p rois array.
+     *
+     * @return a Status
+     */
+    static Status validate(const ITensorInfo *input, const ITensorInfo *rois, const ITensorInfo *output, const ROIPoolingLayerInfo &pool_info);
+
 private:
     const ITensor      *_input;
     const ITensor      *_rois;
-    ITensor            *_output;
+    const ITensor            *_output;
     ROIPoolingLayerInfo _pool_info;
 };
 } // namespace arm_compute