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/*
* Copyright (c) 2018-2019, 2022 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 auto *indices_ptr = static_cast<const uint32_t *>(indices.data());
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());
Window win;
win.use_tensor_dimensions(dst_shape);
if(indices.shape().num_dimensions() == 1u)
{
execute_window_loop(win, [&](const Coordinates & id)
{
Coordinates offset;
for(unsigned int dim = 0; dim < id.num_dimensions(); ++dim)
{
if(dim == actual_axis)
{
offset.set(dim, indices_ptr[id[dim]]);
}
else
{
offset.set(dim, id[dim]);
}
}
*reinterpret_cast<T *>(dst(id)) = *reinterpret_cast<const T *>(src(offset));
});
}
else
{
if(actual_axis == 0)
{
win.set(Window::DimX, Window::Dimension(0, 1, 1));
uint32_t index = 0;
execute_window_loop(win, [&](const Coordinates & id)
{
auto *dst_ptr = reinterpret_cast<T *>(dst(id));
const int row_to_copy = indices[index++];
std::copy_n(src.data() + row_to_copy * src.shape()[0], src.shape()[0], dst_ptr);
});
}
}
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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