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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 */