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//
// Copyright © 2017 Arm Ltd. All rights reserved.
// See LICENSE file in the project root for full license information.
//
#pragma once
#include "Types.hpp"
#include <cmath>
#include <ostream>
#include <boost/assert.hpp>
#include <boost/numeric/conversion/cast.hpp>
namespace armnn
{
constexpr char const* GetStatusAsCString(Status compute)
{
switch (compute)
{
case armnn::Status::Success: return "Status::Success";
case armnn::Status::Failure: return "Status::Failure";
default: return "Unknown";
}
}
constexpr char const* GetComputeDeviceAsCString(Compute compute)
{
switch (compute)
{
case armnn::Compute::CpuRef: return "CpuRef";
case armnn::Compute::CpuAcc: return "CpuAcc";
case armnn::Compute::GpuAcc: return "GpuAcc";
default: return "Unknown";
}
}
constexpr unsigned int GetDataTypeSize(DataType dataType)
{
switch (dataType)
{
case DataType::Signed32:
case DataType::Float32: return 4U;
case DataType::QuantisedAsymm8: return 1U;
default: return 0U;
}
}
template <int N>
constexpr bool StrEqual(const char* strA, const char (&strB)[N])
{
bool isEqual = true;
for (int i = 0; isEqual && (i < N); ++i)
{
isEqual = (strA[i] == strB[i]);
}
return isEqual;
}
constexpr Compute ParseComputeDevice(const char* str)
{
if (StrEqual(str, "CpuAcc"))
{
return armnn::Compute::CpuAcc;
}
else if (StrEqual(str, "CpuRef"))
{
return armnn::Compute::CpuRef;
}
else if (StrEqual(str, "GpuAcc"))
{
return armnn::Compute::GpuAcc;
}
else
{
return armnn::Compute::Undefined;
}
}
constexpr const char* GetDataTypeName(DataType dataType)
{
switch (dataType)
{
case DataType::Float32: return "Float32";
case DataType::QuantisedAsymm8: return "Unsigned8";
case DataType::Signed32: return "Signed32";
default: return "Unknown";
}
}
template <typename T>
constexpr DataType GetDataType();
template <>
constexpr DataType GetDataType<float>()
{
return DataType::Float32;
}
template <>
constexpr DataType GetDataType<uint8_t>()
{
return DataType::QuantisedAsymm8;
}
template <>
constexpr DataType GetDataType<int32_t>()
{
return DataType::Signed32;
}
template<typename T>
constexpr bool IsQuantizedType()
{
return std::is_integral<T>::value;
}
template<DataType DT>
struct ResolveTypeImpl;
template<>
struct ResolveTypeImpl<DataType::QuantisedAsymm8>
{
using Type = uint8_t;
};
template<>
struct ResolveTypeImpl<DataType::Float32>
{
using Type = float;
};
template<DataType DT>
using ResolveType = typename ResolveTypeImpl<DT>::Type;
inline std::ostream& operator<<(std::ostream& os, Status stat)
{
os << GetStatusAsCString(stat);
return os;
}
inline std::ostream& operator<<(std::ostream& os, Compute compute)
{
os << GetComputeDeviceAsCString(compute);
return os;
}
/// Quantize a floating point data type into an 8-bit data type
/// @param value The value to quantize
/// @param scale The scale (must be non-zero)
/// @param offset The offset
/// @return The quantized value calculated as round(value/scale)+offset
///
template<typename QuantizedType>
inline QuantizedType 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);
int quantized = boost::numeric_cast<int>(round(value / scale)) + offset;
QuantizedType quantizedBits = quantized < min ? min : quantized > max ? max : static_cast<QuantizedType>(quantized);
return quantizedBits;
}
/// Dequantize an 8-bit data type into a floating point data type
/// @param value The value to dequantize
/// @param scale The scale (must be non-zero)
/// @param offset The offset
/// @return The dequantized value calculated as (value-offset)*scale
///
template <typename QuantizedType>
inline float Dequantize(QuantizedType value, float scale, int32_t offset)
{
static_assert(IsQuantizedType<QuantizedType>(), "Not an integer type.");
BOOST_ASSERT(scale != 0.f);
float dequantized = boost::numeric_cast<float>(value - offset) * scale;
return dequantized;
}
} //namespace armnn
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