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147 lines
4.7 KiB
C++
147 lines
4.7 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra.
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//
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// Copyright (C) 2009-2010 Gael Guennebaud <gael.guennebaud@inria.fr>
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//
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// This Source Code Form is subject to the terms of the Mozilla
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// Public License v. 2.0. If a copy of the MPL was not distributed
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// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#ifndef EIGEN_FORCEALIGNEDACCESS_H
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#define EIGEN_FORCEALIGNEDACCESS_H
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namespace Eigen {
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/** \class ForceAlignedAccess
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* \ingroup Core_Module
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*
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* \brief Enforce aligned packet loads and stores regardless of what is requested
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*
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* \param ExpressionType the type of the object of which we are forcing aligned packet access
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*
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* This class is the return type of MatrixBase::forceAlignedAccess()
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* and most of the time this is the only way it is used.
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*
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* \sa MatrixBase::forceAlignedAccess()
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*/
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namespace internal {
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template<typename ExpressionType>
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struct traits<ForceAlignedAccess<ExpressionType> > : public traits<ExpressionType>
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{};
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}
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template<typename ExpressionType> class ForceAlignedAccess
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: public internal::dense_xpr_base< ForceAlignedAccess<ExpressionType> >::type
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{
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public:
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typedef typename internal::dense_xpr_base<ForceAlignedAccess>::type Base;
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EIGEN_DENSE_PUBLIC_INTERFACE(ForceAlignedAccess)
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EIGEN_DEVICE_FUNC explicit inline ForceAlignedAccess(const ExpressionType& matrix) : m_expression(matrix) {}
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EIGEN_DEVICE_FUNC inline Index rows() const { return m_expression.rows(); }
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EIGEN_DEVICE_FUNC inline Index cols() const { return m_expression.cols(); }
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EIGEN_DEVICE_FUNC inline Index outerStride() const { return m_expression.outerStride(); }
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EIGEN_DEVICE_FUNC inline Index innerStride() const { return m_expression.innerStride(); }
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EIGEN_DEVICE_FUNC inline const CoeffReturnType coeff(Index row, Index col) const
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{
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return m_expression.coeff(row, col);
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}
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EIGEN_DEVICE_FUNC inline Scalar& coeffRef(Index row, Index col)
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{
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return m_expression.const_cast_derived().coeffRef(row, col);
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}
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EIGEN_DEVICE_FUNC inline const CoeffReturnType coeff(Index index) const
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{
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return m_expression.coeff(index);
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}
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EIGEN_DEVICE_FUNC inline Scalar& coeffRef(Index index)
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{
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return m_expression.const_cast_derived().coeffRef(index);
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}
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template<int LoadMode>
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inline const PacketScalar packet(Index row, Index col) const
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{
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return m_expression.template packet<Aligned>(row, col);
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}
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template<int LoadMode>
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inline void writePacket(Index row, Index col, const PacketScalar& x)
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{
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m_expression.const_cast_derived().template writePacket<Aligned>(row, col, x);
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}
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template<int LoadMode>
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inline const PacketScalar packet(Index index) const
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{
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return m_expression.template packet<Aligned>(index);
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}
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template<int LoadMode>
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inline void writePacket(Index index, const PacketScalar& x)
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{
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m_expression.const_cast_derived().template writePacket<Aligned>(index, x);
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}
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EIGEN_DEVICE_FUNC operator const ExpressionType&() const { return m_expression; }
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protected:
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const ExpressionType& m_expression;
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private:
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ForceAlignedAccess& operator=(const ForceAlignedAccess&);
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};
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/** \returns an expression of *this with forced aligned access
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* \sa forceAlignedAccessIf(),class ForceAlignedAccess
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*/
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template<typename Derived>
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inline const ForceAlignedAccess<Derived>
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MatrixBase<Derived>::forceAlignedAccess() const
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{
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return ForceAlignedAccess<Derived>(derived());
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}
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/** \returns an expression of *this with forced aligned access
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* \sa forceAlignedAccessIf(), class ForceAlignedAccess
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*/
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template<typename Derived>
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inline ForceAlignedAccess<Derived>
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MatrixBase<Derived>::forceAlignedAccess()
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{
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return ForceAlignedAccess<Derived>(derived());
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}
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/** \returns an expression of *this with forced aligned access if \a Enable is true.
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* \sa forceAlignedAccess(), class ForceAlignedAccess
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*/
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template<typename Derived>
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template<bool Enable>
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inline typename internal::add_const_on_value_type<typename internal::conditional<Enable,ForceAlignedAccess<Derived>,Derived&>::type>::type
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MatrixBase<Derived>::forceAlignedAccessIf() const
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{
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return derived(); // FIXME This should not work but apparently is never used
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}
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/** \returns an expression of *this with forced aligned access if \a Enable is true.
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* \sa forceAlignedAccess(), class ForceAlignedAccess
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*/
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template<typename Derived>
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template<bool Enable>
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inline typename internal::conditional<Enable,ForceAlignedAccess<Derived>,Derived&>::type
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MatrixBase<Derived>::forceAlignedAccessIf()
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{
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return derived(); // FIXME This should not work but apparently is never used
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}
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} // end namespace Eigen
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#endif // EIGEN_FORCEALIGNEDACCESS_H
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