DiagonalProduct.h
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00001 // This file is part of Eigen, a lightweight C++ template library
00002 // for linear algebra.
00003 //
00004 // Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr>
00005 // Copyright (C) 2007-2009 Benoit Jacob <jacob.benoit.1@gmail.com>
00006 //
00007 // This Source Code Form is subject to the terms of the Mozilla
00008 // Public License v. 2.0. If a copy of the MPL was not distributed
00009 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
00010 
00011 #ifndef EIGEN_DIAGONALPRODUCT_H
00012 #define EIGEN_DIAGONALPRODUCT_H
00013 
00014 namespace Eigen { 
00015 
00016 namespace internal {
00017 template<typename MatrixType, typename DiagonalType, int ProductOrder>
00018 struct traits<DiagonalProduct<MatrixType, DiagonalType, ProductOrder> >
00019  : traits<MatrixType>
00020 {
00021   typedef typename scalar_product_traits<typename MatrixType::Scalar, typename DiagonalType::Scalar>::ReturnType Scalar;
00022   enum {
00023     RowsAtCompileTime = MatrixType::RowsAtCompileTime,
00024     ColsAtCompileTime = MatrixType::ColsAtCompileTime,
00025     MaxRowsAtCompileTime = MatrixType::MaxRowsAtCompileTime,
00026     MaxColsAtCompileTime = MatrixType::MaxColsAtCompileTime,
00027 
00028     _StorageOrder = MatrixType::Flags & RowMajorBit ? RowMajor : ColMajor,
00029     _ScalarAccessOnDiag =  !((int(_StorageOrder) == ColMajor && int(ProductOrder) == OnTheLeft)
00030                           ||(int(_StorageOrder) == RowMajor && int(ProductOrder) == OnTheRight)),
00031     _SameTypes = is_same<typename MatrixType::Scalar, typename DiagonalType::Scalar>::value,
00032     // FIXME currently we need same types, but in the future the next rule should be the one
00033     //_Vectorizable = bool(int(MatrixType::Flags)&PacketAccessBit) && ((!_PacketOnDiag) || (_SameTypes && bool(int(DiagonalType::DiagonalVectorType::Flags)&PacketAccessBit))),
00034     _Vectorizable = bool(int(MatrixType::Flags)&PacketAccessBit) && _SameTypes && (_ScalarAccessOnDiag || (bool(int(DiagonalType::DiagonalVectorType::Flags)&PacketAccessBit))),
00035     _LinearAccessMask = (RowsAtCompileTime==1 || ColsAtCompileTime==1) ? LinearAccessBit : 0,
00036 
00037     Flags = ((HereditaryBits|_LinearAccessMask) & (unsigned int)(MatrixType::Flags)) | (_Vectorizable ? PacketAccessBit : 0) | AlignedBit,//(int(MatrixType::Flags)&int(DiagonalType::DiagonalVectorType::Flags)&AlignedBit),
00038     CoeffReadCost = NumTraits<Scalar>::MulCost + MatrixType::CoeffReadCost + DiagonalType::DiagonalVectorType::CoeffReadCost
00039   };
00040 };
00041 }
00042 
00043 template<typename MatrixType, typename DiagonalType, int ProductOrder>
00044 class DiagonalProduct : internal::no_assignment_operator,
00045                         public MatrixBase<DiagonalProduct<MatrixType, DiagonalType, ProductOrder> >
00046 {
00047   public:
00048 
00049     typedef MatrixBase<DiagonalProduct> Base;
00050     EIGEN_DENSE_PUBLIC_INTERFACE(DiagonalProduct)
00051 
00052     inline DiagonalProduct(const MatrixType& matrix, const DiagonalType& diagonal)
00053       : m_matrix(matrix), m_diagonal(diagonal)
00054     {
00055       eigen_assert(diagonal.diagonal().size() == (ProductOrder == OnTheLeft ? matrix.rows() : matrix.cols()));
00056     }
00057 
00058     EIGEN_STRONG_INLINE Index rows() const { return m_matrix.rows(); }
00059     EIGEN_STRONG_INLINE Index cols() const { return m_matrix.cols(); }
00060 
00061     EIGEN_STRONG_INLINE const Scalar coeff(Index row, Index col) const
00062     {
00063       return m_diagonal.diagonal().coeff(ProductOrder == OnTheLeft ? row : col) * m_matrix.coeff(row, col);
00064     }
00065     
00066     EIGEN_STRONG_INLINE const Scalar coeff(Index idx) const
00067     {
00068       enum {
00069         StorageOrder = int(MatrixType::Flags) & RowMajorBit ? RowMajor : ColMajor
00070       };
00071       return coeff(int(StorageOrder)==ColMajor?idx:0,int(StorageOrder)==ColMajor?0:idx);
00072     }
00073 
00074     template<int LoadMode>
00075     EIGEN_STRONG_INLINE PacketScalar packet(Index row, Index col) const
00076     {
00077       enum {
00078         StorageOrder = Flags & RowMajorBit ? RowMajor : ColMajor
00079       };
00080       const Index indexInDiagonalVector = ProductOrder == OnTheLeft ? row : col;
00081       return packet_impl<LoadMode>(row,col,indexInDiagonalVector,typename internal::conditional<
00082         ((int(StorageOrder) == RowMajor && int(ProductOrder) == OnTheLeft)
00083        ||(int(StorageOrder) == ColMajor && int(ProductOrder) == OnTheRight)), internal::true_type, internal::false_type>::type());
00084     }
00085     
00086     template<int LoadMode>
00087     EIGEN_STRONG_INLINE PacketScalar packet(Index idx) const
00088     {
00089       enum {
00090         StorageOrder = int(MatrixType::Flags) & RowMajorBit ? RowMajor : ColMajor
00091       };
00092       return packet<LoadMode>(int(StorageOrder)==ColMajor?idx:0,int(StorageOrder)==ColMajor?0:idx);
00093     }
00094 
00095   protected:
00096     template<int LoadMode>
00097     EIGEN_STRONG_INLINE PacketScalar packet_impl(Index row, Index col, Index id, internal::true_type) const
00098     {
00099       return internal::pmul(m_matrix.template packet<LoadMode>(row, col),
00100                      internal::pset1<PacketScalar>(m_diagonal.diagonal().coeff(id)));
00101     }
00102 
00103     template<int LoadMode>
00104     EIGEN_STRONG_INLINE PacketScalar packet_impl(Index row, Index col, Index id, internal::false_type) const
00105     {
00106       enum {
00107         InnerSize = (MatrixType::Flags & RowMajorBit) ? MatrixType::ColsAtCompileTime : MatrixType::RowsAtCompileTime,
00108         DiagonalVectorPacketLoadMode = (LoadMode == Aligned && (((InnerSize%16) == 0) || (int(DiagonalType::DiagonalVectorType::Flags)&AlignedBit)==AlignedBit) ? Aligned : Unaligned)
00109       };
00110       return internal::pmul(m_matrix.template packet<LoadMode>(row, col),
00111                      m_diagonal.diagonal().template packet<DiagonalVectorPacketLoadMode>(id));
00112     }
00113 
00114     typename MatrixType::Nested m_matrix;
00115     typename DiagonalType::Nested m_diagonal;
00116 };
00117 
00120 template<typename Derived>
00121 template<typename DiagonalDerived>
00122 inline const DiagonalProduct<Derived, DiagonalDerived, OnTheRight>
00123 MatrixBase<Derived>::operator*(const DiagonalBase<DiagonalDerived> &a_diagonal) const
00124 {
00125   return DiagonalProduct<Derived, DiagonalDerived, OnTheRight>(derived(), a_diagonal.derived());
00126 }
00127 
00128 } // end namespace Eigen
00129 
00130 #endif // EIGEN_DIAGONALPRODUCT_H


acado
Author(s): Milan Vukov, Rien Quirynen
autogenerated on Thu Aug 27 2015 11:58:07