arm_compute/core/NEON/kernels/convolution/common/qasymm8.hpp

/*
 * Copyright (c) 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
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 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#pragma once
#include <cstdint>

namespace qasymm8
{

struct QAsymm8Params
{
  uint8_t quantize(float value) const;
  float dequantize(uint8_t value) const;

  uint8_t offset;
  float scale;
};

struct QAsymm8RescaleParams
{
  static QAsymm8RescaleParams make_rescale_params(
    const QAsymm8Params& weight_quant,
    const QAsymm8Params& input_quant,
    const QAsymm8Params& output_quant
  );

  QAsymm8RescaleParams(int32_t shift, int32_t multiplier, float rescale);

  const int32_t shift, multiplier;
  const float rescale;
};

}