COMPMID-1527 - Implementing ReorgLayer on OpenCL

Also extended tests on NEON

Change-Id: Icb0eced534e904ef807972dd3a31988f501bb02e
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/147095
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Tested-by: Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/runtime/CL/functions/CLReorgLayer.h b/arm_compute/runtime/CL/functions/CLReorgLayer.h
new file mode 100644
index 0000000..88559a8
--- /dev/null
+++ b/arm_compute/runtime/CL/functions/CLReorgLayer.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_CLREORGLAYER_H__
+#define __ARM_COMPUTE_CLREORGLAYER_H__
+
+#include "arm_compute/core/Types.h"
+#include "arm_compute/runtime/CL/ICLSimpleFunction.h"
+
+namespace arm_compute
+{
+class ICLTensor;
+
+class CLReorgLayer : public ICLSimpleFunction
+{
+public:
+    /** Initialise the function's source and destination.
+     *
+     * @param[in]  input  Source tensor. Data types supported: U8/S8/QASYMM8/U16/S16/F16/U32/S32/F32.
+     * @param[out] output Destination tensor with tensor shape:
+     *                    [width_input / stride, height_input / stride, channels_input * stride * stride, batch_size]. This means the output has
+     *                    the same number of input elements. Data types supported: same as @p input.
+     * @param[in]  stride Stride value to use for reorganizing the values in the output tensor.
+     *                    It defines the spatial distance between 2 consecutive pixels in the x and y direction
+     *
+     */
+    void configure(ICLTensor *input, ICLTensor *output, int32_t stride);
+    /** Static function to check if given info will lead to a valid configuration of @ref CLReorgLayer
+     *
+     * @param[in] input  Source tensor. Data types supported: U8/S8/QASYMM8/U16/S16/F16/U32/S32/F32.
+     * @param[in] output Destination tensor with tensor shape:
+     *                   [width_input / stride, height_input / stride, channels_input * stride * stride, batch_size]. This means the output has
+     *                   the same number of input elements. Data types supported: same as @p input. Data types supported: same as @p input.
+     * @param[in] stride Stride value to use for reorganizing the values in the output tensor
+     *                   It defines the spatial distance between 2 consecutive pixels in the x and y direction
+     *
+     * @return a status
+     */
+    static Status validate(const ITensorInfo *input, const ITensorInfo *output, int32_t stride);
+};
+} // namespace arm_compute
+#endif /*__ARM_COMPUTE_CLREORGLAYER_H__ */