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annotate liboctave/numeric/sparse-base-lu.cc @ 20830:b65888ec820e draft default tip gccjit

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dmalcom gcc jit import
author Stefan Mahr <dac922@gmx.de>
date Fri, 27 Feb 2015 16:59:36 +0100
parents 4197fc428c7d
children
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1 /*
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2
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3 Copyright (C) 2004-2015 David Bateman
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4 Copyright (C) 1998-2004 Andy Adler
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5
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6 This file is part of Octave.
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7
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8 Octave is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 3 of the License, or (at your
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11 option) any later version.
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12
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13 Octave is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with Octave; see the file COPYING. If not, see
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20 <http://www.gnu.org/licenses/>.
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21
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22 */
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23
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24 #ifdef HAVE_CONFIG_H
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25 #include <config.h>
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26 #endif
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27
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28 #include "sparse-base-lu.h"
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29
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30 #include "PermMatrix.h"
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31
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32 template <class lu_type, class lu_elt_type, class p_type, class p_elt_type>
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33 lu_type
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34 sparse_base_lu <lu_type, lu_elt_type, p_type, p_elt_type> :: Y (void) const
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35 {
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36 octave_idx_type nr = Lfact.rows ();
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37 octave_idx_type nz = Lfact.cols ();
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38 octave_idx_type nc = Ufact.cols ();
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39
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40 lu_type Yout (nr, nc, Lfact.nnz () + Ufact.nnz () - (nr<nz?nr:nz));
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41 octave_idx_type ii = 0;
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42 Yout.xcidx (0) = 0;
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43
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44 for (octave_idx_type j = 0; j < nc; j++)
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45 {
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46 for (octave_idx_type i = Ufact.cidx (j); i < Ufact.cidx (j + 1); i++)
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47 {
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48 Yout.xridx (ii) = Ufact.ridx (i);
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49 Yout.xdata (ii++) = Ufact.data (i);
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50 }
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51 if (j < nz)
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52 {
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53 // Note the +1 skips the 1.0 on the diagonal
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54 for (octave_idx_type i = Lfact.cidx (j) + 1;
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55 i < Lfact.cidx (j +1); i++)
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56 {
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57 Yout.xridx (ii) = Lfact.ridx (i);
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58 Yout.xdata (ii++) = Lfact.data (i);
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59 }
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60 }
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61 Yout.xcidx (j + 1) = ii;
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62 }
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63
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64 return Yout;
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65 }
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66
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67 template <class lu_type, class lu_elt_type, class p_type, class p_elt_type>
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68 p_type
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69 sparse_base_lu <lu_type, lu_elt_type, p_type, p_elt_type> :: Pr (void) const
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70 {
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71
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72 octave_idx_type nr = Lfact.rows ();
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73
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74 p_type Pout (nr, nr, nr);
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75
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76 for (octave_idx_type i = 0; i < nr; i++)
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77 {
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78 Pout.cidx (i) = i;
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79 Pout.ridx (P (i)) = i;
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80 Pout.data (i) = 1;
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81 }
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82 Pout.cidx (nr) = nr;
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83
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84 return Pout;
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85 }
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86
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87 template <class lu_type, class lu_elt_type, class p_type, class p_elt_type>
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88 ColumnVector
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89 sparse_base_lu <lu_type, lu_elt_type, p_type, p_elt_type> :: Pr_vec (void) const
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90 {
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91
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92 octave_idx_type nr = Lfact.rows ();
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93
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94 ColumnVector Pout (nr);
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95
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96 for (octave_idx_type i = 0; i < nr; i++)
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97 Pout.xelem (i) = static_cast<double> (P(i) + 1);
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98
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99 return Pout;
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100 }
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101
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102 template <class lu_type, class lu_elt_type, class p_type, class p_elt_type>
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103 PermMatrix
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104 sparse_base_lu <lu_type, lu_elt_type, p_type, p_elt_type> :: Pr_mat (void) const
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105 {
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106 return PermMatrix (P, false);
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107 }
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108
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109 template <class lu_type, class lu_elt_type, class p_type, class p_elt_type>
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110 p_type
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111 sparse_base_lu <lu_type, lu_elt_type, p_type, p_elt_type> :: Pc (void) const
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112 {
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113 octave_idx_type nc = Ufact.cols ();
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114
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115 p_type Pout (nc, nc, nc);
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116
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117 for (octave_idx_type i = 0; i < nc; i++)
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118 {
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119 Pout.cidx (i) = i;
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120 Pout.ridx (i) = Q (i);
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121 Pout.data (i) = 1;
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122 }
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123 Pout.cidx (nc) = nc;
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124
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125 return Pout;
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126 }
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127
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128 template <class lu_type, class lu_elt_type, class p_type, class p_elt_type>
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129 ColumnVector
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130 sparse_base_lu <lu_type, lu_elt_type, p_type, p_elt_type> :: Pc_vec (void) const
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131 {
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132
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133 octave_idx_type nc = Ufact.cols ();
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134
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135 ColumnVector Pout (nc);
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136
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137 for (octave_idx_type i = 0; i < nc; i++)
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138 Pout.xelem (i) = static_cast<double> (Q(i) + 1);
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139
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140 return Pout;
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141 }
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142
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Jason Riedy <jason@acm.org>
parents: 8954
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143 template <class lu_type, class lu_elt_type, class p_type, class p_elt_type>
3ecbc236e2e0 Have sparse LU return permutation matrices rather than sparse matrices.
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parents: 8954
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144 PermMatrix
3ecbc236e2e0 Have sparse LU return permutation matrices rather than sparse matrices.
Jason Riedy <jason@acm.org>
parents: 8954
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145 sparse_base_lu <lu_type, lu_elt_type, p_type, p_elt_type> :: Pc_mat (void) const
3ecbc236e2e0 Have sparse LU return permutation matrices rather than sparse matrices.
Jason Riedy <jason@acm.org>
parents: 8954
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146 {
3ecbc236e2e0 Have sparse LU return permutation matrices rather than sparse matrices.
Jason Riedy <jason@acm.org>
parents: 8954
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147 return PermMatrix (Q, true);
3ecbc236e2e0 Have sparse LU return permutation matrices rather than sparse matrices.
Jason Riedy <jason@acm.org>
parents: 8954
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148 }