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/*
* Copyright (c) 2017-2019 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_TEST_PADDING_CALCULATOR_H
#define ARM_COMPUTE_TEST_PADDING_CALCULATOR_H
#include "arm_compute/core/Types.h"
#include <cmath>
namespace arm_compute
{
namespace test
{
/** Calculate required padding. */
class PaddingCalculator final
{
public:
/** Options for computing the padding */
enum class Option
{
EXCLUDE_BORDER,
INCLUDE_BORDER
};
/** Construct calculator with size of tensor's dimension and step size.
*
* @param[in] size Number of elements available.
* @param[in] processed_elements Number of elements processed per iteration.
*/
PaddingCalculator(int size, int processed_elements)
: _size{ size }, _num_processed_elements{ processed_elements }, _num_accessed_elements{ processed_elements }
{
}
/** Set border mode.
*
* @param[in] mode Border mode.
*/
void set_border_mode(BorderMode mode);
/** Set border size.
*
* @param[in] size Border size in elements.
*/
void set_border_size(int size);
/** Set offset of the access relative to the current position.
*
* @param[in] offset Offset of the access.
*/
void set_access_offset(int offset);
/** Set number of processed elements.
*
* @param[in] elements Number of processed elements per iteration.
*/
void set_processed_elements(int elements);
/** Set number of accessed elements.
*
* @param[in] elements Number of accessed elements per iteration.
*/
void set_accessed_elements(int elements);
/** Compute the required padding.
*
* If access offset is negative and border mode is not undefined, the top,
* bottom and left padding is set to boder size. Otherwise it is zero.
* The right padding is always computed based on the specified parameters.
*
* @return Required padding in number of elements.
*/
PaddingSize required_padding() const;
/** Compute the required padding.
*
* If @p option is INCLUDE_BORDER and border mode is not undefined, the top,
* bottom and left padding is set to boder size. Otherwise it is zero.
* The right padding is always computed based on the specified parameters.
*
* @param[in] option Padding option
*
* @return Required padding in number of elements.
*/
PaddingSize required_padding(Option option) const;
private:
int _size;
int _num_processed_elements;
int _num_accessed_elements;
BorderMode _mode{ BorderMode::UNDEFINED };
int _border_size{ 0 };
int _offset{ 0 };
};
inline void PaddingCalculator::set_border_mode(BorderMode mode)
{
_mode = mode;
}
inline void PaddingCalculator::set_border_size(int size)
{
_border_size = size;
}
inline void PaddingCalculator::set_access_offset(int offset)
{
_offset = offset;
}
inline void PaddingCalculator::set_processed_elements(int elements)
{
_num_processed_elements = elements;
}
inline void PaddingCalculator::set_accessed_elements(int elements)
{
_num_accessed_elements = elements;
}
inline PaddingSize PaddingCalculator::required_padding() const
{
return required_padding(_offset < 0 ? Option::INCLUDE_BORDER : Option::EXCLUDE_BORDER);
}
inline PaddingSize PaddingCalculator::required_padding(Option option) const
{
PaddingSize padding{ (_mode == BorderMode::UNDEFINED || option == Option::EXCLUDE_BORDER) ? 0U : static_cast<unsigned int>(std::max(0, _border_size)) };
int padding_right = 0;
if(_mode == BorderMode::UNDEFINED)
{
padding_right = (((_size - 2 * _border_size + _num_processed_elements - 1) / _num_processed_elements) - 1) * _num_processed_elements + _num_accessed_elements - _size + _border_size + _offset;
}
else
{
padding_right = (((_size + _num_processed_elements - 1) / _num_processed_elements) - 1) * _num_processed_elements + _num_accessed_elements - _size + _offset;
}
padding.right = std::max(0, padding_right);
return padding;
}
} // namespace test
} // namespace arm_compute
#endif /* ARM_COMPUTE_TEST_PADDING_CALCULATOR_H */
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