densematrix_operations.h

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/*
 * Copyright (c) 2010-2015:  G-CSC, Goethe University Frankfurt
 * Author: Martin Rupp
 * 
 * This file is part of UG4.
 * 
 * UG4 is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License version 3 (as published by the
 * Free Software Foundation) with the following additional attribution
 * requirements (according to LGPL/GPL v3 §7):
 * 
 * (1) The following notice must be displayed in the Appropriate Legal Notices
 * of covered and combined works: "Based on UG4 (www.ug4.org/license)".
 * 
 * (2) The following notice must be displayed at a prominent place in the
 * terminal output of covered works: "Based on UG4 (www.ug4.org/license)".
 * 
 * (3) The following bibliography is recommended for citation and must be
 * preserved in all covered files:
 * "Reiter, S., Vogel, A., Heppner, I., Rupp, M., and Wittum, G. A massively
 *   parallel geometric multigrid solver on hierarchically distributed grids.
 *   Computing and visualization in science 16, 4 (2013), 151-164"
 * "Vogel, A., Reiter, S., Rupp, M., Nägel, A., and Wittum, G. UG4 -- a novel
 *   flexible software system for simulating pde based models on high performance
 *   computers. Computing and visualization in science 16, 4 (2013), 165-179"
 * 
 * This program 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 for more details.
 */
 
#ifndef __H__UG__COMMON__DENSEMATRIX_OPERATIONS_H__
#define __H__UG__COMMON__DENSEMATRIX_OPERATIONS_H__
 
#include "densematrix.h"
#include "densevector.h"
 
#include "../../common/operations.h"
 
namespace ug{
 
 
template<typename T>
struct matrix_algebra_type_traits;
 
template<typename T>
struct matrix_algebra_type_traits<DenseMatrix<T> >
{
  static const int type = MATRIX_USE_GLOBAL_FUNCTIONS;
};
 
template<typename vector_t, typename matrix_t>
inline void MatMult(DenseVector<vector_t> &dest,
    const number &beta1, const DenseMatrix<matrix_t> &A1, const DenseVector<vector_t> &w1)
{
  for(size_t r = 0; r < dest.size(); ++r)
  {
    MatMult(dest[r], beta1, A1(r,0), w1[0]);
    for(size_t c = 1; c < w1.size(); ++c)
      MatMultAdd(dest[r], 1.0, dest[r], beta1, A1(r,c), w1[c]);
  }
}
 
template<typename vector_t, typename matrix_t>
inline void MatMultAdd(DenseVector<vector_t> &dest,
    const number &alpha1, const DenseVector<vector_t> &v1,
    const number &beta1, const DenseMatrix<matrix_t> &A1, const DenseVector<vector_t> &w1)
{
  for(size_t r = 0; r < dest.size(); ++r)
  {
    VecScaleAssign(dest[r], alpha1, v1[r]);
    for(size_t c = 0; c < w1.size(); ++c)
      MatMultAdd(dest[r], 1.0, dest[r], beta1, A1(r,c), w1[c]);
  }
}
 
template<typename vector_t, typename matrix_t>
inline void MatMultTransposedAdd(DenseVector<vector_t> &dest,
    const number &alpha1, const DenseVector<vector_t> &v1,
    const number &beta1, const DenseMatrix<matrix_t> &A1, const DenseVector<vector_t> &w1)
{
  for(size_t r = 0; r < dest.size(); ++r)
  {
    VecScaleAssign(dest[r], alpha1, v1[r]);
    for(size_t c = 0; c < w1.size(); ++c)
      MatMultTransposedAdd(dest[r], 1.0, dest[r], beta1, A1(c,r), w1[c]);
  }
}
 
// end group small_algebra
 
}
 
#endif // __H__UG__COMMON__DENSEMATRIX_OPERATIONS_H__