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/*
* Copyright (c) 2018-2019, 2022-2023 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.
*/
#include "Gather.h"
#include "arm_compute/core/Types.h"
#include "arm_compute/core/utils/misc/ShapeCalculator.h"
#include "tests/validation/Helpers.h"
namespace arm_compute
{
namespace test
{
namespace validation
{
namespace reference
{
template <typename T>
SimpleTensor<T> gather(const SimpleTensor<T> &src, const SimpleTensor<uint32_t> &indices, uint32_t actual_axis)
{
const TensorShape dst_shape = arm_compute::misc::shape_calculator::compute_gather_shape(src.shape(), indices.shape(), actual_axis);
SimpleTensor<T> dst(dst_shape, src.data_type());
const auto src_ptr = static_cast<const T *>(src.data());
const auto indices_ptr = static_cast<const uint32_t *>(indices.data());
const auto dst_ptr = static_cast<T *>(dst.data());
const uint32_t index_limit = src.shape()[actual_axis];
Window win;
win.use_tensor_dimensions(dst_shape);
execute_window_loop(win, [&](const Coordinates &dst_coords) {
const auto dst_addr = coords2index(dst.shape(), dst_coords);
// Calculate the coordinates of the index value.
Coordinates idx_coords;
for(size_t i = 0; i < indices.shape().num_dimensions(); ++i)
{
idx_coords.set(i, dst_coords[i + actual_axis]);
}
const auto index = indices_ptr[coords2index(indices.shape(), idx_coords)];
if(index < index_limit)
{
// Calculate the coordinates of the source data.
Coordinates src_coords;
for(size_t i = 0; i < actual_axis; ++i)
{
src_coords.set(i, dst_coords[i]);
}
src_coords.set(actual_axis, index);
for(size_t i = actual_axis + 1; i < src.shape().num_dimensions(); ++i)
{
src_coords.set(i, dst_coords[i + indices.shape().num_dimensions() - 1]);
}
// Copy the data.
const auto src_addr = coords2index(src.shape(), src_coords);
dst_ptr[dst_addr] = src_ptr[src_addr];
}
else
{
dst_ptr[dst_addr] = 0;
}
});
return dst;
}
template SimpleTensor<float> gather(const SimpleTensor<float> &src, const SimpleTensor<uint32_t> &indices, uint32_t actual_axis);
template SimpleTensor<half> gather(const SimpleTensor<half> &src, const SimpleTensor<uint32_t> &indices, uint32_t actual_axis);
template SimpleTensor<uint16_t> gather(const SimpleTensor<uint16_t> &src, const SimpleTensor<uint32_t> &indices, uint32_t actual_axis);
template SimpleTensor<uint8_t> gather(const SimpleTensor<uint8_t> &src, const SimpleTensor<uint32_t> &indices, uint32_t actual_axis);
} // namespace reference
} // namespace validation
} // namespace test
} // namespace arm_compute
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