diff options
author | Gael Guennebaud <g.gael@free.fr> | 2009-11-20 16:30:14 +0100 |
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committer | Gael Guennebaud <g.gael@free.fr> | 2009-11-20 16:30:14 +0100 |
commit | 4af1753b6fa83e2c0013f38e6d9e8538896d9d3c (patch) | |
tree | 65d8d1573ba8505e30f22e5939b804f0206135de /Eigen/src/Core/ForceAlignedAccess.h | |
parent | eb8f4500719b52f410c545f738d8fda399cea587 (diff) |
* remove EnforceAlignedAccess option to Block, VectorBlock, Map and MapBase
because thanks to the previous commit this is not needed anymore
* add a more general ForceAlignedAccess expression which can be used for any expression.
It is already used by StableNorm.h.
Diffstat (limited to 'Eigen/src/Core/ForceAlignedAccess.h')
-rw-r--r-- | Eigen/src/Core/ForceAlignedAccess.h | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/Eigen/src/Core/ForceAlignedAccess.h b/Eigen/src/Core/ForceAlignedAccess.h new file mode 100644 index 000000000..b3fbb3c5c --- /dev/null +++ b/Eigen/src/Core/ForceAlignedAccess.h @@ -0,0 +1,151 @@ +// This file is part of Eigen, a lightweight C++ template library +// for linear algebra. +// +// Copyright (C) 2009 Gael Guennebaud <g.gael@free.fr> +// +// Eigen is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 3 of the License, or (at your option) any later version. +// +// Alternatively, you can redistribute it and/or +// modify it under the terms of the GNU General Public License as +// published by the Free Software Foundation; either version 2 of +// the License, or (at your option) any later version. +// +// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY +// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License or the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License and a copy of the GNU General Public License along with +// Eigen. If not, see <http://www.gnu.org/licenses/>. + +#ifndef EIGEN_FORCEALIGNEDACCESS_H +#define EIGEN_FORCEALIGNEDACCESS_H + +/** \class ForceAlignedAccess + * + * \brief Enforce aligned packet loads and stores regardless of what is requested + * + * \param ExpressionType the type of the object of which we are forcing aligned packet access + * + * This class is the return type of MatrixBase::forceAlignedAccess() + * and most of the time this is the only way it is used. + * + * \sa MatrixBase::forceAlignedAccess() + */ +template<typename ExpressionType> +struct ei_traits<ForceAlignedAccess<ExpressionType> > : public ei_traits<ExpressionType> +{}; + +template<typename ExpressionType> class ForceAlignedAccess + : public MatrixBase<ForceAlignedAccess<ExpressionType> > +{ + public: + + EIGEN_GENERIC_PUBLIC_INTERFACE(ForceAlignedAccess) + + inline ForceAlignedAccess(const ExpressionType& matrix) : m_expression(matrix) {} + + inline int rows() const { return m_expression.rows(); } + inline int cols() const { return m_expression.cols(); } + inline int stride() const { return m_expression.stride(); } + + inline const CoeffReturnType coeff(int row, int col) const + { + return m_expression.coeff(row, col); + } + + inline Scalar& coeffRef(int row, int col) + { + return m_expression.const_cast_derived().coeffRef(row, col); + } + + inline const CoeffReturnType coeff(int index) const + { + return m_expression.coeff(index); + } + + inline Scalar& coeffRef(int index) + { + return m_expression.const_cast_derived().coeffRef(index); + } + + template<int LoadMode> + inline const PacketScalar packet(int row, int col) const + { + return m_expression.template packet<Aligned>(row, col); + } + + template<int LoadMode> + inline void writePacket(int row, int col, const PacketScalar& x) + { + m_expression.const_cast_derived().template writePacket<Aligned>(row, col, x); + } + + template<int LoadMode> + inline const PacketScalar packet(int index) const + { + return m_expression.template packet<Aligned>(index); + } + + template<int LoadMode> + inline void writePacket(int index, const PacketScalar& x) + { + m_expression.const_cast_derived().template writePacket<Aligned>(index, x); + } + + operator const ExpressionType&() const { return m_expression; } + + protected: + const ExpressionType& m_expression; + + private: + ForceAlignedAccess& operator=(const ForceAlignedAccess&); +}; + +/** \returns an expression of *this with forced aligned access + * \sa forceAlignedAccessIf(),class ForceAlignedAccess + */ +template<typename Derived> +inline const ForceAlignedAccess<Derived> +MatrixBase<Derived>::forceAlignedAccess() const +{ + return ForceAlignedAccess<Derived>(derived()); +} + +/** \returns an expression of *this with forced aligned access + * \sa forceAlignedAccessIf(), class ForceAlignedAccess + */ +template<typename Derived> +inline ForceAlignedAccess<Derived> +MatrixBase<Derived>::forceAlignedAccess() +{ + return ForceAlignedAccess<Derived>(derived()); +} + +/** \returns an expression of *this with forced aligned access if \a Enable is true. + * \sa forceAlignedAccess(), class ForceAlignedAccess + */ +template<typename Derived> +template<bool Enable> +inline const typename ei_meta_if<Enable,ForceAlignedAccess<Derived>,Derived&>::ret +MatrixBase<Derived>::forceAlignedAccessIf() const +{ + return derived(); +} + +/** \returns an expression of *this with forced aligned access if \a Enable is true. + * \sa forceAlignedAccess(), class ForceAlignedAccess + */ +template<typename Derived> +template<bool Enable> +inline typename ei_meta_if<Enable,ForceAlignedAccess<Derived>,Derived&>::ret +MatrixBase<Derived>::forceAlignedAccessIf() +{ + return derived(); +} + +#endif // EIGEN_FORCEALIGNEDACCESS_H |