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//
// Copyright © 2017 Arm Ltd. All rights reserved.
// SPDX-License-Identifier: MIT
//
#include <armnn/TypesUtils.hpp>
#include <boost/assert.hpp>
#include <boost/numeric/conversion/cast.hpp>
template<typename QuantizedType>
QuantizedType armnn::Quantize(float value, float scale, int32_t offset)
{
static_assert(IsQuantizedType<QuantizedType>(), "Not an integer type.");
constexpr QuantizedType max = std::numeric_limits<QuantizedType>::max();
constexpr QuantizedType min = std::numeric_limits<QuantizedType>::lowest();
BOOST_ASSERT(scale != 0.f);
BOOST_ASSERT(!std::isnan(value));
float clampedValue = std::min(std::max(static_cast<float>(round(value/scale) + offset), static_cast<float>(min)),
static_cast<float>(max));
auto quantizedBits = static_cast<QuantizedType>(clampedValue);
return quantizedBits;
}
template <typename QuantizedType>
float armnn::Dequantize(QuantizedType value, float scale, int32_t offset)
{
static_assert(IsQuantizedType<QuantizedType>(), "Not an integer type.");
BOOST_ASSERT(scale != 0.f);
BOOST_ASSERT(!std::isnan(value));
float dequantized = boost::numeric_cast<float>(value - offset) * scale;
return dequantized;
}
/// Explicit specialization of Quantize for uint8_t
template
uint8_t armnn::Quantize<uint8_t>(float value, float scale, int32_t offset);
/// Explicit specialization of Quantize for int16_t
template
int16_t armnn::Quantize<int16_t>(float value, float scale, int32_t offset);
/// Explicit specialization of Quantize for int32_t
template
int32_t armnn::Quantize<int32_t>(float value, float scale, int32_t offset);
/// Explicit specialization of Dequantize for uint8_t
template
float armnn::Dequantize<uint8_t>(uint8_t value, float scale, int32_t offset);
/// Explicit specialization of Dequantize for int16_t
template
float armnn::Dequantize<int16_t>(int16_t value, float scale, int32_t offset);
/// Explicit specialization of Dequantize for int32_t
template
float armnn::Dequantize<int32_t>(int32_t value, float scale, int32_t offset);
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