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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_DEVICE_H
#define EIGEN_CXX11_TENSOR_TENSOR_DEVICE_H
namespace Eigen {
/** \class TensorDevice
* \ingroup CXX11_Tensor_Module
*
* \brief Pseudo expression providing an operator = that will evaluate its argument
* on the specified computing 'device' (GPU, thread pool, ...)
*
* Example:
* C.device(EIGEN_GPU) = A + B;
*
* Todo: thread pools.
* Todo: operator +=, -=, *= and so on.
*/
template <typename ExpressionType, typename DeviceType> class TensorDevice {
public:
TensorDevice(const DeviceType& device, ExpressionType& expression) : m_device(device), m_expression(expression) {}
template<typename OtherDerived>
EIGEN_STRONG_INLINE TensorDevice& operator=(const OtherDerived& other) {
internal::TensorAssign<ExpressionType, const OtherDerived>::run(m_expression, other);
return *this;
}
protected:
const DeviceType& m_device;
ExpressionType& m_expression;
};
#ifdef EIGEN_USE_THREADS
template <typename ExpressionType> class TensorDevice<ExpressionType, ThreadPoolDevice> {
public:
TensorDevice(const ThreadPoolDevice& device, ExpressionType& expression) : m_device(device), m_expression(expression) {}
template<typename OtherDerived>
EIGEN_STRONG_INLINE TensorDevice& operator=(const OtherDerived& other) {
internal::TensorAssignMultiThreaded<ExpressionType, const OtherDerived>::run(m_expression, other, m_device);
return *this;
}
protected:
const ThreadPoolDevice& m_device;
ExpressionType& m_expression;
};
#endif
#if defined(EIGEN_USE_GPU) && defined(__CUDACC__)
template <typename ExpressionType> class TensorDevice<ExpressionType, GpuDevice>
{
public:
TensorDevice(const GpuDevice& device, ExpressionType& expression) : m_device(device), m_expression(expression) {}
template<typename OtherDerived>
EIGEN_STRONG_INLINE TensorDevice& operator=(const OtherDerived& other) {
internal::TensorAssignGpu<ExpressionType, const OtherDerived>::run(m_expression, other, m_device);
return *this;
}
protected:
const GpuDevice& m_device;
ExpressionType& m_expression;
};
#endif
} // end namespace Eigen
#endif // EIGEN_CXX11_TENSOR_TENSOR_DEVICE_H
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