1//=====================================================
2// File   :  action_cholesky.hh
3// Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr>
4//=====================================================
5//
6// This program is free software; you can redistribute it and/or
7// modify it under the terms of the GNU General Public License
8// as published by the Free Software Foundation; either version 2
9// of the License, or (at your option) any later version.
10//
11// This program is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14// GNU General Public License for more details.
15// You should have received a copy of the GNU General Public License
16// along with this program; if not, write to the Free Software
17// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
18//
19#ifndef ACTION_CHOLESKY
20#define ACTION_CHOLESKY
21#include "utilities.h"
22#include "STL_interface.hh"
23#include <string>
24#include "init/init_function.hh"
25#include "init/init_vector.hh"
26#include "init/init_matrix.hh"
27
28using namespace std;
29
30template<class Interface>
31class Action_cholesky {
32
33public :
34
35  // Ctor
36
37  Action_cholesky( int size ):_size(size)
38  {
39    MESSAGE("Action_cholesky Ctor");
40
41    // STL mat/vec initialization
42    init_matrix_symm<pseudo_random>(X_stl,_size);
43    init_matrix<null_function>(C_stl,_size);
44
45    // make sure X is invertible
46    for (int i=0; i<_size; ++i)
47      X_stl[i][i] = std::abs(X_stl[i][i]) * 1e2 + 100;
48
49    // generic matrix and vector initialization
50    Interface::matrix_from_stl(X_ref,X_stl);
51    Interface::matrix_from_stl(X,X_stl);
52    Interface::matrix_from_stl(C,C_stl);
53
54    _cost = 0;
55    for (int j=0; j<_size; ++j)
56    {
57      double r = std::max(_size - j -1,0);
58      _cost += 2*(r*j+r+j);
59    }
60  }
61
62  // invalidate copy ctor
63
64  Action_cholesky( const  Action_cholesky & )
65  {
66    INFOS("illegal call to Action_cholesky Copy Ctor");
67    exit(1);
68  }
69
70  // Dtor
71
72  ~Action_cholesky( void ){
73
74    MESSAGE("Action_cholesky Dtor");
75
76    // deallocation
77    Interface::free_matrix(X_ref,_size);
78    Interface::free_matrix(X,_size);
79    Interface::free_matrix(C,_size);
80  }
81
82  // action name
83
84  static inline std::string name( void )
85  {
86    return "cholesky_"+Interface::name();
87  }
88
89  double nb_op_base( void ){
90    return _cost;
91  }
92
93  inline void initialize( void ){
94    Interface::copy_matrix(X_ref,X,_size);
95  }
96
97  inline void calculate( void ) {
98      Interface::cholesky(X,C,_size);
99  }
100
101  void check_result( void ){
102    // calculation check
103//     STL_interface<typename Interface::real_type>::cholesky(X_stl,C_stl,_size);
104//
105//     typename Interface::real_type error=
106//       STL_interface<typename Interface::real_type>::norm_diff(C_stl,resu_stl);
107//
108//     if (error>1.e-6){
109//       INFOS("WRONG CALCULATION...residual=" << error);
110//       exit(0);
111//     }
112
113  }
114
115private :
116
117  typename Interface::stl_matrix X_stl;
118  typename Interface::stl_matrix C_stl;
119
120  typename Interface::gene_matrix X_ref;
121  typename Interface::gene_matrix X;
122  typename Interface::gene_matrix C;
123
124  int _size;
125  double _cost;
126};
127
128#endif
129