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/*
* Copyright (c) 2019-2023 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_NEGATHERKERNEL_H
#define ARM_COMPUTE_NEGATHERKERNEL_H
#include "arm_compute/core/Types.h"
#include "src/core/NEON/INEKernel.h"
namespace arm_compute
{
// Forward declarations
class ITensor;
/** Kernel to perform gather operation. */
class NEGatherKernel : public INEKernel
{
public:
/** Default constructor. */
NEGatherKernel();
/** Prevent instances of this class from being copied (As this class contains pointers). */
NEGatherKernel(const NEGatherKernel &) = delete;
/** Prevent instances of this class from being copied (As this class contains pointers). */
NEGatherKernel &operator=(const NEGatherKernel &) = delete;
/** Allow instances of this class to be moved. */
NEGatherKernel(NEGatherKernel &&) = default;
/** Allow instances of this class to be moved. */
NEGatherKernel &operator=(NEGatherKernel &&) = default;
/** Default detructor */
~NEGatherKernel() = default;
/** Name of the kernel
*
* @return Kernel name
*/
const char *name() const override
{
return "NEGatherKernel";
}
/** Initialise the kernel's inputs and outputs
*
* @param[in] input Source tensor. Supported tensor rank: up to 4. Data type supported: All
* @param[in] indices Indices tensor. Supported tensor rank: up to 3. Must be one of the following type: U32/S32. Each value Must be in range [0, input.shape[@p axis])
* @note 2D or 3D indices are only supported for the axis 1.
* @param[out] output Destination tensor. Data type supported: Same as @p input
* @param[in] axis (Optional) The axis in @p input to gather @p indices from. Negative values wrap around. Defaults to 0.
*
*/
void configure(const ITensor *input, const ITensor *indices, ITensor *output, int axis = 0);
/** Static function to check if given info will lead to a valid configuration
*
* Similar to @ref NEGatherKernel::configure()
*
* @return a status
*/
static Status validate(const ITensorInfo *input, const ITensorInfo *indices, const ITensorInfo *output, int axis);
// Inherited methods overridden:
void run(const Window &window, const ThreadInfo &info) override;
private:
template <typename TIndex>
void gather_common(const Window &window, const ThreadInfo &info);
using kernel_ptr = void (NEGatherKernel::*)(const Window &window, const ThreadInfo &info);
const ITensor *_input;
const ITensor *_indices;
int _axis;
ITensor *_output;
kernel_ptr _func;
Strides _src_it_strides;
Strides _idx_it_strides;
};
} // namespace arm_compute
#endif /* ARM_COMPUTE_NEGATHERKERNEL_H */
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