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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2014 Benoit Steiner <benoit.steiner.goog@gmail.com>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
#ifndef EIGEN_CXX11_TENSOR_TENSOR_FUNCTORS_H
#define EIGEN_CXX11_TENSOR_TENSOR_FUNCTORS_H
namespace Eigen {
namespace internal {
// Standard reduction functors
template <typename T> struct SumReducer
{
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE SumReducer() : m_sum(0) { }
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE void reduce(const T t) {
m_sum += t;
}
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE T finalize() const {
return m_sum;
}
private:
T m_sum;
};
template <typename T> struct MaxReducer
{
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE MaxReducer() : m_max((std::numeric_limits<T>::min)()) { }
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE void reduce(const T t) {
if (t > m_max) { m_max = t; }
}
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE T finalize() const {
return m_max;
}
private:
T m_max;
};
template <typename T> struct MinReducer
{
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE MinReducer() : m_min((std::numeric_limits<T>::max)()) { }
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE void reduce(const T t) {
if (t < m_min) { m_min = t; }
}
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE T finalize() const {
return m_min;
}
private:
T m_min;
};
} // end namespace internal
} // end namespace Eigen
#endif // EIGEN_CXX11_TENSOR_TENSOR_FUNCTORS_H
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