matrix_use_operators.h

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/*
 * Copyright (c) 2011-2012:  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.
 */
 
 
// MATRIX_USE_OPERATORS: elementary types like double, float, or template operatored classes: use operators
 
namespace ug{
 
template<typename vector_t, typename matrix_t>
struct mat_operations_class<vector_t, matrix_t, MATRIX_USE_OPERATORS>
{
  static inline bool MatMult(vector_t &dest, const number &beta1, const matrix_t &A1, const vector_t &w1)
  {
    dest = beta1 * A1 * w1;
    return true;
  }
 
  static inline bool MatMultAdd(vector_t &dest,
      const number &alpha1, const vector_t &v1,
      const number &beta1, const matrix_t &A1, const vector_t &w1)
  {
    dest = alpha1*v1 + beta1 * A1 * w1;
    return true;
  }
  static inline bool MatMultAdd(vector_t &dest,
      const number &alpha1, const vector_t &v1,
      const number &alpha2, const vector_t &v2,
      const number &beta1, const matrix_t &A1, const vector_t &w1)
  {
    dest = alpha1*v1 + alpha2*v2 + beta1 * A1 * w1;
    return true;
  }
  static inline bool MatMultAdd(vector_t &dest,
      const number &beta1, const matrix_t &A1, const vector_t &w1,
      const number &beta2, const matrix_t &A2, const vector_t &w2)
  {
    dest = beta1 * A1 * w1 + beta2 * A2 * w2;
    return true;
  }
  static inline bool MatMultAdd(vector_t &dest,
      const number &alpha1, const vector_t &v1,
      const number &beta1, const matrix_t &A1, const vector_t &w1,
      const number &beta2, const matrix_t &A2, const vector_t &w2)
  {
    dest = alpha1*v1 + beta1 * A1 * w1 + beta2 * A2 * w2;
    return true;
  }
 
  static inline bool MatMultTransposed(vector_t &dest,
      const number &beta1, const matrix_t &A1, const vector_t &w1)
  {
    dest = beta1 * A1 * w1;
    return true;
  }
 
  static inline bool MatMultTransposedAdd(vector_t &dest,
      const number &alpha1, const vector_t &v1,
      const number &beta1, const matrix_t &A1, const vector_t &w1)
  {
    dest = alpha1*v1 + beta1 * A1 * w1;
    return true;
  }
};
 
}