diff options
author | Benoit Steiner <benoit.steiner.goog@gmail.com> | 2014-10-01 20:38:22 -0700 |
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committer | Benoit Steiner <benoit.steiner.goog@gmail.com> | 2014-10-01 20:38:22 -0700 |
commit | 7caaf6453b7b1f58d953729380d596b2d9b27835 (patch) | |
tree | 59003efb25e7119af4da63b0371efb53daddbcf8 /unsupported/Eigen/CXX11/src/Tensor/TensorFunctors.h | |
parent | 1c236f4c9ae78cc58156eebe3b2bb43588897af4 (diff) |
Added support for tensor reductions and concatenations
Diffstat (limited to 'unsupported/Eigen/CXX11/src/Tensor/TensorFunctors.h')
-rw-r--r-- | unsupported/Eigen/CXX11/src/Tensor/TensorFunctors.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorFunctors.h b/unsupported/Eigen/CXX11/src/Tensor/TensorFunctors.h new file mode 100644 index 000000000..92984336c --- /dev/null +++ b/unsupported/Eigen/CXX11/src/Tensor/TensorFunctors.h @@ -0,0 +1,62 @@ +// 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 |