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annotate liboctave/floatLU.cc @ 10514:40c58502a78b

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improve conversion & copy ctors of sparse matrix
author Jaroslav Hajek <highegg@gmail.com>
date Tue, 13 Apr 2010 12:45:24 +0200
parents 12884915a8e4
children 141b3fb5cef7
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1 /*
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2
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3 Copyright (C) 1994, 1995, 1996, 1997, 1999, 2002, 2003, 2004, 2005,
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4 2007, 2008 John W. Eaton
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5 Copyright (C) 2009 VZLU Prague, a.s.
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6
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7 This file is part of Octave.
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8
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9 Octave is free software; you can redistribute it and/or modify it
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10 under the terms of the GNU General Public License as published by the
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11 Free Software Foundation; either version 3 of the License, or (at your
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12 option) any later version.
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13
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14 Octave is distributed in the hope that it will be useful, but WITHOUT
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15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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17 for more details.
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18
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19 You should have received a copy of the GNU General Public License
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20 along with Octave; see the file COPYING. If not, see
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21 <http://www.gnu.org/licenses/>.
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22
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23 */
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24
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25 #ifdef HAVE_CONFIG_H
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26 #include <config.h>
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27 #endif
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28
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29 #include "floatLU.h"
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30 #include "f77-fcn.h"
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31 #include "lo-error.h"
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32 #include "oct-locbuf.h"
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33 #include "fColVector.h"
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34
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35 // Instantiate the base LU class for the types we need.
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36
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37 #include <base-lu.h>
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38 #include <base-lu.cc>
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39
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40 template class base_lu <FloatMatrix>;
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41
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42 // Define the constructor for this particular derivation.
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43
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44 extern "C"
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45 {
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46 F77_RET_T
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47 F77_FUNC (sgetrf, SGETRF) (const octave_idx_type&, const octave_idx_type&, float*,
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48 const octave_idx_type&, octave_idx_type*, octave_idx_type&);
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49
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50 #ifdef HAVE_QRUPDATE_LUU
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51 F77_RET_T
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52 F77_FUNC (slu1up, SLU1UP) (const octave_idx_type&, const octave_idx_type&,
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53 float *, const octave_idx_type&,
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54 float *, const octave_idx_type&,
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55 float *, float *);
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56
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57 F77_RET_T
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58 F77_FUNC (slup1up, SLUP1UP) (const octave_idx_type&, const octave_idx_type&,
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59 float *, const octave_idx_type&,
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60 float *, const octave_idx_type&,
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61 octave_idx_type *, const float *,
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62 const float *, float *);
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63 #endif
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64 }
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65
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66 FloatLU::FloatLU (const FloatMatrix& a)
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67 {
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68 octave_idx_type a_nr = a.rows ();
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69 octave_idx_type a_nc = a.cols ();
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70 octave_idx_type mn = (a_nr < a_nc ? a_nr : a_nc);
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71
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72 ipvt.resize (mn, 1);
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73 octave_idx_type *pipvt = ipvt.fortran_vec ();
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74
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75 a_fact = a;
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76 float *tmp_data = a_fact.fortran_vec ();
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77
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78 octave_idx_type info = 0;
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79
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80 F77_XFCN (sgetrf, SGETRF, (a_nr, a_nc, tmp_data, a_nr, pipvt, info));
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81
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82 for (octave_idx_type i = 0; i < mn; i++)
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83 pipvt[i] -= 1;
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84 }
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85
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86 #ifdef HAVE_QRUPDATE_LUU
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87
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88 void FloatLU::update (const FloatColumnVector& u, const FloatColumnVector& v)
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89 {
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90 if (packed ())
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91 unpack ();
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92
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93 FloatMatrix& l = l_fact;
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94 FloatMatrix& r = a_fact;
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95
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96 octave_idx_type m = l.rows ();
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97 octave_idx_type n = r.columns ();
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98 octave_idx_type k = l.columns ();
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99
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100 if (u.length () == m && v.length () == n)
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101 {
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102 FloatColumnVector utmp = u, vtmp = v;
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103 F77_XFCN (slu1up, SLU1UP, (m, n, l.fortran_vec (), m, r.fortran_vec (), k,
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104 utmp.fortran_vec (), vtmp.fortran_vec ()));
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105 }
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106 else
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107 (*current_liboctave_error_handler) ("luupdate: dimensions mismatch");
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108 }
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109
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110 void FloatLU::update (const FloatMatrix& u, const FloatMatrix& v)
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111 {
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112 if (packed ())
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113 unpack ();
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114
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115 FloatMatrix& l = l_fact;
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116 FloatMatrix& r = a_fact;
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117
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118 octave_idx_type m = l.rows ();
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119 octave_idx_type n = r.columns ();
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120 octave_idx_type k = l.columns ();
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121
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122 if (u.rows () == m && v.rows () == n && u.cols () == v.cols ())
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123 {
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124 for (volatile octave_idx_type i = 0; i < u.cols (); i++)
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125 {
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126 FloatColumnVector utmp = u.column (i), vtmp = v.column (i);
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127 F77_XFCN (slu1up, SLU1UP, (m, n, l.fortran_vec (), m, r.fortran_vec (), k,
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128 utmp.fortran_vec (), vtmp.fortran_vec ()));
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129 }
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130 }
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131 else
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132 (*current_liboctave_error_handler) ("luupdate: dimensions mismatch");
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133 }
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134
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135 void FloatLU::update_piv (const FloatColumnVector& u, const FloatColumnVector& v)
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136 {
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137 if (packed ())
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138 unpack ();
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139
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140 FloatMatrix& l = l_fact;
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141 FloatMatrix& r = a_fact;
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142
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143 octave_idx_type m = l.rows ();
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144 octave_idx_type n = r.columns ();
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145 octave_idx_type k = l.columns ();
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146
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147 if (u.length () == m && v.length () == n)
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148 {
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149 FloatColumnVector utmp = u, vtmp = v;
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150 OCTAVE_LOCAL_BUFFER (float, w, m);
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151 for (octave_idx_type i = 0; i < m; i++) ipvt(i) += 1; // increment
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152 F77_XFCN (slup1up, SLUP1UP, (m, n, l.fortran_vec (), m, r.fortran_vec (), k,
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153 ipvt.fortran_vec (), utmp.data (), vtmp.data (), w));
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154 for (octave_idx_type i = 0; i < m; i++) ipvt(i) -= 1; // decrement
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155 }
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156 else
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157 (*current_liboctave_error_handler) ("luupdate: dimensions mismatch");
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158 }
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159
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160 void FloatLU::update_piv (const FloatMatrix& u, const FloatMatrix& v)
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161 {
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162 if (packed ())
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163 unpack ();
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164
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165 FloatMatrix& l = l_fact;
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166 FloatMatrix& r = a_fact;
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167
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168 octave_idx_type m = l.rows ();
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169 octave_idx_type n = r.columns ();
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170 octave_idx_type k = l.columns ();
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171
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172 if (u.rows () == m && v.rows () == n && u.cols () == v.cols ())
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173 {
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174 OCTAVE_LOCAL_BUFFER (float, w, m);
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175 for (octave_idx_type i = 0; i < m; i++) ipvt(i) += 1; // increment
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176 for (volatile octave_idx_type i = 0; i < u.cols (); i++)
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177 {
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178 FloatColumnVector utmp = u.column (i), vtmp = v.column (i);
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179 F77_XFCN (slup1up, SLUP1UP, (m, n, l.fortran_vec (), m, r.fortran_vec (), k,
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180 ipvt.fortran_vec (), utmp.data (), vtmp.data (), w));
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181 }
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182 for (octave_idx_type i = 0; i < m; i++) ipvt(i) -= 1; // decrement
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183 }
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184 else
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185 (*current_liboctave_error_handler) ("luupdate: dimensions mismatch");
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186 }
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187
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188 #else
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189
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190 void FloatLU::update (const FloatColumnVector&, const FloatColumnVector&)
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191 {
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192 (*current_liboctave_error_handler) ("luupdate: not available in this version");
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193 }
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194
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195 void FloatLU::update (const FloatMatrix&, const FloatMatrix&)
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196 {
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197 (*current_liboctave_error_handler) ("luupdate: not available in this version");
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198 }
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199
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200 void FloatLU::update_piv (const FloatColumnVector&, const FloatColumnVector&)
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201 {
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202 (*current_liboctave_error_handler) ("luupdate: not available in this version");
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203 }
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204
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205 void FloatLU::update_piv (const FloatMatrix&, const FloatMatrix&)
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206 {
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207 (*current_liboctave_error_handler) ("luupdate: not available in this version");
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208 }
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209
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210 #endif