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/*
* Copyright (c) 2018 Samsung Electronics Co., Ltd. All Rights Reserved
* Copyright (c) 2016-2018 ARM Limited.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file CLGatherExKernel.h
* @ingroup COM_AI_RUNTIME
* @brief This file defines CLGatherExKernel class
*/
#ifndef __ARM_COMPUTE_CLGATHEREXKERNEL_H__
#define __ARM_COMPUTE_CLGATHEREXKERNEL_H__
#include "arm_compute/core/CL/ICLKernel.h"
namespace arm_compute
{
class ICLTensor;
/**
* @brief Class to define an interface for the gather kernel.
*/
class CLGatherExKernel : public ICLKernel
{
public:
/**
* @brief Construct CLGatherExKernel object
* */
CLGatherExKernel();
/**
* @brief Prevent instances of this class from being copied (As this class contains pointers).
*/
CLGatherExKernel(const CLGatherExKernel &) = delete;
/**
* @brief Prevent instances of this class from being copied (As this class contains pointers).
*/
CLGatherExKernel &operator=(const CLGatherExKernel &) = delete;
/**
* @brief Construct CLGatherExKernel object by using default move constructor
* @param[in] CLGatherExKernel object to move
*/
CLGatherExKernel(CLGatherExKernel &&) = default;
/**
* @brief Move assignment operator
* @param[in] CLGatherExKernel object to move
*/
CLGatherExKernel &operator=(CLGatherExKernel &&) = default;
/**
* @brief Initialise the kernel's input, output and border mode.
* @param[in] input An input tensor. Data types supported: U8/QASYMM8/S32/F32.
* @param[in] indices Indices tensor. Data types supported: S32.
* @param[out] output The output tensor, Data types supported: same as @p input1.
* @param[in] axis (Optional) The axis in @p input to gather @p indices from. Negative
* values wrap around. Defaults to 0
* @return N/A
*/
void configure(const ICLTensor *input, const ICLTensor *indices, ICLTensor *output, int axis = 0);
/**
* @brief Static function to check if given info will lead to a valid configuration of @ref
* CLGatherExKernel
* @param[in] input An input tensor. Data types supported: U8/QASYMM8/S32/F32.
* @param[in] indices Indices tensor. Data types supported: S32.
* @param[out] output The output tensor, Data types supported: same as @p input1.
* @param[in] axis (Optional) The axis in @p input to gather @p indices from. Negative
* values wrap around. Defaults to 0
* @return a status
*/
static Status validate(const ITensorInfo *input, const ITensorInfo *indices,
const ITensorInfo *output, int axis = 0);
/**
* @brief Enqueue the OpenCL kernel to process the given window on the passed OpenCL command
* queue.
* @note The queue is *not* flushed by this method, and therefore the kernel will not have
* been executed by the time this method returns.
* @param[in] window Region on which to execute the kernel. (Must be a valid region of
* the window returned by window()).
* @param[in,out] queue Command queue on which to enqueue the kernel.@return N/A
* @return N/A
*/
void run(const Window &window, cl::CommandQueue &queue) override;
private:
const ICLTensor *_input;
const ICLTensor *_indices;
ICLTensor *_output;
int _axis;
};
} // namespace arm_compute
#endif /*__ARM_COMPUTE_CLGATHEREXKERNEL_H__ */
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