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/*
* Copyright (c) 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 "arm_compute/core/Error.h"
#include <cstdint>
#include <cstring>
namespace arm_compute
{
namespace cpu
{
void depth_to_space_nhwc_any( //
const uint8_t *src,
uint8_t *dst,
const uintptr_t src_shape[4],
const uintptr_t src_strides[4],
const uintptr_t dst_strides[4],
uintptr_t element_size,
uintptr_t block_size)
{
ARM_COMPUTE_ERROR_ON(src_strides[0] != element_size);
ARM_COMPUTE_ERROR_ON(dst_strides[0] != element_size);
const auto src_block_row_stride = (src_shape[0] / block_size) * element_size;
const auto dst_width_block_stride = block_size * dst_strides[1];
auto *src_batch_ptr = src;
auto *dst_batch_ptr = dst;
for (uintptr_t batch = 0; batch < src_shape[3]; ++batch)
{
auto *src_height_block_ptr = src_batch_ptr;
auto *dst_row_ptr = dst_batch_ptr;
for (uintptr_t height_block = 0; height_block < src_shape[2]; ++height_block)
{
auto *src_block_row_ptr = src_height_block_ptr;
for (uintptr_t block_row = 0; block_row < block_size; ++block_row)
{
auto *src_width_block_ptr = src_block_row_ptr;
auto *dst_width_block_ptr = dst_row_ptr;
for (uintptr_t width_block = 0; width_block < src_shape[1]; ++width_block)
{
// The source pointer is accumulated as:
//
// src_width_block_ptr =
// src +
// batch * src_strides[3] +
// height_block * src_strides[2] +
// width_block * src_strides[1] +
// block_row * (src_shape[0] / block_size) * element_size;
//
// The destination pointer is accumulated as:
//
// dst_width_block_ptr =
// dst +
// batch * dst_strides[3] +
// (height_block * block_size + block_row) * dst_strides[2] +
// width_block * block_size * dst_strides[1];
std::memcpy(dst_width_block_ptr, src_width_block_ptr, src_block_row_stride);
src_width_block_ptr += src_strides[1];
dst_width_block_ptr += dst_width_block_stride;
}
src_block_row_ptr += src_block_row_stride;
dst_row_ptr += dst_strides[2];
}
src_height_block_ptr += src_strides[2];
}
src_batch_ptr += src_strides[3];
dst_batch_ptr += dst_strides[3];
}
}
} // namespace cpu
} // namespace arm_compute
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