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annotate libinterp/corefcn/dot.cc @ 18099:6a71e5030df5

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Follow coding convention of defining and initializing only 1 variable per line in liboctinterp. * libinterp/corefcn/balance.cc, libinterp/corefcn/bsxfun.cc, libinterp/corefcn/cellfun.cc, libinterp/corefcn/data.cc, libinterp/corefcn/dlmread.cc, libinterp/corefcn/dot.cc, libinterp/corefcn/eig.cc, libinterp/corefcn/find.cc, libinterp/corefcn/gcd.cc, libinterp/corefcn/gl-render.cc, libinterp/corefcn/gl2ps-renderer.cc, libinterp/corefcn/graphics.cc, libinterp/corefcn/kron.cc, libinterp/corefcn/load-save.cc, libinterp/corefcn/lookup.cc, libinterp/corefcn/ls-hdf5.cc, libinterp/corefcn/ls-mat5.cc, libinterp/corefcn/lu.cc, libinterp/corefcn/max.cc, libinterp/corefcn/oct-map.cc, libinterp/corefcn/oct-obj.cc, libinterp/corefcn/oct-stream.cc, libinterp/corefcn/sparse.cc, libinterp/corefcn/sqrtm.cc, libinterp/corefcn/str2double.cc, libinterp/corefcn/strfind.cc, libinterp/corefcn/strfns.cc, libinterp/corefcn/tril.cc, libinterp/corefcn/txt-eng-ft.cc, libinterp/corefcn/variables.cc, libinterp/corefcn/xdiv.cc, libinterp/dldfcn/__delaunayn__.cc, libinterp/dldfcn/qr.cc, libinterp/dldfcn/symrcm.cc, libinterp/dldfcn/tsearch.cc, libinterp/octave-value/ov-base-diag.cc, libinterp/octave-value/ov-base-int.cc, libinterp/octave-value/ov-base-mat.cc, libinterp/octave-value/ov-bool-mat.cc, libinterp/octave-value/ov-bool-sparse.cc, libinterp/octave-value/ov-bool.cc, libinterp/octave-value/ov-cell.cc, libinterp/octave-value/ov-class.cc, libinterp/octave-value/ov-complex.cc, libinterp/octave-value/ov-cx-diag.cc, libinterp/octave-value/ov-cx-mat.cc, libinterp/octave-value/ov-cx-sparse.cc, libinterp/octave-value/ov-fcn-handle.cc, libinterp/octave-value/ov-fcn-inline.cc, libinterp/octave-value/ov-float.cc, libinterp/octave-value/ov-flt-complex.cc, libinterp/octave-value/ov-flt-cx-diag.cc, libinterp/octave-value/ov-flt-cx-mat.cc, libinterp/octave-value/ov-flt-re-diag.cc, libinterp/octave-value/ov-flt-re-mat.cc, libinterp/octave-value/ov-java.cc, libinterp/octave-value/ov-range.cc, libinterp/octave-value/ov-re-diag.cc, libinterp/octave-value/ov-re-mat.cc, libinterp/octave-value/ov-re-sparse.cc, libinterp/octave-value/ov-scalar.cc, libinterp/octave-value/ov-str-mat.cc, libinterp/octave-value/ov-usr-fcn.cc, libinterp/parse-tree/pt-cbinop.cc, libinterp/parse-tree/pt-eval.cc, libinterp/parse-tree/pt-mat.cc: Follow coding convention of defining and initializing only 1 variable per line in liboctinterp.
author Rik <rik@octave.org>
date Thu, 05 Dec 2013 10:50:17 -0800
parents 175b392e91fe
children 78fac67300e8
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1 /*
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2
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3 Copyright (C) 2009-2013 VZLU Prague
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include "f77-fcn.h"
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28 #include "mx-base.h"
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29 #include "error.h"
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30 #include "defun.h"
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31 #include "parse.h"
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32
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33 extern "C"
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34 {
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35 F77_RET_T
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36 F77_FUNC (ddot3, DDOT3) (const octave_idx_type&, const octave_idx_type&,
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37 const octave_idx_type&, const double*,
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38 const double*, double*);
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39
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40 F77_RET_T
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41 F77_FUNC (sdot3, SDOT3) (const octave_idx_type&, const octave_idx_type&,
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42 const octave_idx_type&, const float*,
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43 const float*, float*);
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44
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45 F77_RET_T
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46 F77_FUNC (zdotc3, ZDOTC3) (const octave_idx_type&, const octave_idx_type&,
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47 const octave_idx_type&, const Complex*,
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48 const Complex*, Complex*);
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49
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50 F77_RET_T
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51 F77_FUNC (cdotc3, CDOTC3) (const octave_idx_type&, const octave_idx_type&,
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52 const octave_idx_type&, const FloatComplex*,
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53 const FloatComplex*, FloatComplex*);
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54
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55 F77_RET_T
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56 F77_FUNC (dmatm3, DMATM3) (const octave_idx_type&, const octave_idx_type&,
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57 const octave_idx_type&, const octave_idx_type&,
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58 const double*, const double*, double*);
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59
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60 F77_RET_T
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61 F77_FUNC (smatm3, SMATM3) (const octave_idx_type&, const octave_idx_type&,
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62 const octave_idx_type&, const octave_idx_type&,
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63 const float*, const float*, float*);
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64
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65 F77_RET_T
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66 F77_FUNC (zmatm3, ZMATM3) (const octave_idx_type&, const octave_idx_type&,
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67 const octave_idx_type&, const octave_idx_type&,
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68 const Complex*, const Complex*, Complex*);
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69
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70 F77_RET_T
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71 F77_FUNC (cmatm3, CMATM3) (const octave_idx_type&, const octave_idx_type&,
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72 const octave_idx_type&, const octave_idx_type&,
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73 const FloatComplex*, const FloatComplex*,
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74 FloatComplex*);
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75 }
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76
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77 static void
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78 get_red_dims (const dim_vector& x, const dim_vector& y, int dim,
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79 dim_vector& z, octave_idx_type& m, octave_idx_type& n,
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80 octave_idx_type& k)
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81 {
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82 int nd = x.length ();
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83 assert (nd == y.length ());
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84 z = dim_vector::alloc (nd);
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85 m = 1, n = 1, k = 1;
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86 for (int i = 0; i < nd; i++)
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87 {
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88 if (i < dim)
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89 {
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90 z(i) = x(i);
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91 m *= x(i);
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92 }
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93 else if (i > dim)
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94 {
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95 z(i) = x(i);
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96 n *= x(i);
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97 }
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98 else
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99 {
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100 k = x(i);
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101 z(i) = 1;
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102 }
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103 }
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104 }
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105
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106 DEFUN (dot, args, ,
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107 "-*- texinfo -*-\n\
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108 @deftypefn {Built-in Function} {} dot (@var{x}, @var{y}, @var{dim})\n\
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109 Compute the dot product of two vectors. If @var{x} and @var{y}\n\
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110 are matrices, calculate the dot products along the first\n\
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111 non-singleton dimension. If the optional argument @var{dim} is\n\
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112 given, calculate the dot products along this dimension.\n\
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113 \n\
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114 This is equivalent to\n\
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115 @code{sum (conj (@var{X}) .* @var{Y}, @var{dim})},\n\
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116 but avoids forming a temporary array and is faster. When @var{X} and\n\
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117 @var{Y} are column vectors, the result is equivalent to\n\
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118 @code{@var{X}' * @var{Y}}.\n\
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119 @seealso{cross, divergence}\n\
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120 @end deftypefn")
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121 {
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122 octave_value retval;
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123 int nargin = args.length ();
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124
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125 if (nargin < 2 || nargin > 3)
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126 {
90bc0cc4518f implement compiled dot and blkmm
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127 print_usage ();
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128 return retval;
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129 }
90bc0cc4518f implement compiled dot and blkmm
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parents:
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130
18099
6a71e5030df5 Follow coding convention of defining and initializing only 1 variable per line in liboctinterp.
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131 octave_value argx = args(0);
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132 octave_value argy = args(1);
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133
90bc0cc4518f implement compiled dot and blkmm
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134 if (argx.is_numeric_type () && argy.is_numeric_type ())
90bc0cc4518f implement compiled dot and blkmm
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parents:
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135 {
18099
6a71e5030df5 Follow coding convention of defining and initializing only 1 variable per line in liboctinterp.
Rik <rik@octave.org>
parents: 17787
diff changeset
136 dim_vector dimx = argx.dims ();
6a71e5030df5 Follow coding convention of defining and initializing only 1 variable per line in liboctinterp.
Rik <rik@octave.org>
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137 dim_vector dimy = argy.dims ();
9874
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parents:
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138 bool match = dimx == dimy;
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11553
diff changeset
139 if (! match && nargin == 2
9874
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140 && dimx.is_vector () && dimy.is_vector ())
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141 {
90bc0cc4518f implement compiled dot and blkmm
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142 // Change to column vectors.
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143 dimx = dimx.redim (1);
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144 argx = argx.reshape (dimx);
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145 dimy = dimy.redim (1);
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146 argy = argy.reshape (dimy);
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147 match = ! error_state;
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148 }
90bc0cc4518f implement compiled dot and blkmm
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parents:
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149
90bc0cc4518f implement compiled dot and blkmm
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parents:
diff changeset
150 if (match)
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parents:
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151 {
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152 int dim;
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parents:
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153 if (nargin == 2)
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154 dim = dimx.first_non_singleton ();
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155 else
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156 dim = args(2).int_value (true) - 1;
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parents:
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157
90bc0cc4518f implement compiled dot and blkmm
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parents:
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158 if (error_state)
90bc0cc4518f implement compiled dot and blkmm
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159 ;
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160 else if (dim < 0)
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parents: 11523
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161 error ("dot: DIM must be a valid dimension");
9874
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162 else
90bc0cc4518f implement compiled dot and blkmm
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163 {
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164 octave_idx_type m, n, k;
90bc0cc4518f implement compiled dot and blkmm
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165 dim_vector dimz;
90bc0cc4518f implement compiled dot and blkmm
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166 if (argx.is_complex_type () || argy.is_complex_type ())
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167 {
90bc0cc4518f implement compiled dot and blkmm
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168 if (argx.is_single_type () || argy.is_single_type ())
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169 {
90bc0cc4518f implement compiled dot and blkmm
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170 FloatComplexNDArray x = argx.float_complex_array_value ();
90bc0cc4518f implement compiled dot and blkmm
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171 FloatComplexNDArray y = argy.float_complex_array_value ();
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172 get_red_dims (dimx, dimy, dim, dimz, m, n, k);
90bc0cc4518f implement compiled dot and blkmm
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173 FloatComplexNDArray z(dimz);
90bc0cc4518f implement compiled dot and blkmm
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174 if (! error_state)
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Rik <rik@octave.org>
parents: 17744
diff changeset
175 F77_XFCN (cdotc3, CDOTC3, (m, n, k,
175b392e91fe Use GNU style coding conventions for code in libinterp/
Rik <rik@octave.org>
parents: 17744
diff changeset
176 x.data (), y.data (),
9874
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177 z.fortran_vec ()));
90bc0cc4518f implement compiled dot and blkmm
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178 retval = z;
90bc0cc4518f implement compiled dot and blkmm
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179 }
90bc0cc4518f implement compiled dot and blkmm
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parents:
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180 else
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
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181 {
90bc0cc4518f implement compiled dot and blkmm
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182 ComplexNDArray x = argx.complex_array_value ();
90bc0cc4518f implement compiled dot and blkmm
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183 ComplexNDArray y = argy.complex_array_value ();
90bc0cc4518f implement compiled dot and blkmm
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184 get_red_dims (dimx, dimy, dim, dimz, m, n, k);
90bc0cc4518f implement compiled dot and blkmm
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185 ComplexNDArray z(dimz);
90bc0cc4518f implement compiled dot and blkmm
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186 if (! error_state)
17787
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diff changeset
187 F77_XFCN (zdotc3, ZDOTC3, (m, n, k,
175b392e91fe Use GNU style coding conventions for code in libinterp/
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parents: 17744
diff changeset
188 x.data (), y.data (),
9874
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189 z.fortran_vec ()));
90bc0cc4518f implement compiled dot and blkmm
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190 retval = z;
90bc0cc4518f implement compiled dot and blkmm
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191 }
90bc0cc4518f implement compiled dot and blkmm
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parents:
diff changeset
192 }
90bc0cc4518f implement compiled dot and blkmm
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193 else if (argx.is_float_type () && argy.is_float_type ())
90bc0cc4518f implement compiled dot and blkmm
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194 {
90bc0cc4518f implement compiled dot and blkmm
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parents:
diff changeset
195 if (argx.is_single_type () || argy.is_single_type ())
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
196 {
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
197 FloatNDArray x = argx.float_array_value ();
90bc0cc4518f implement compiled dot and blkmm
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diff changeset
198 FloatNDArray y = argy.float_array_value ();
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
199 get_red_dims (dimx, dimy, dim, dimz, m, n, k);
90bc0cc4518f implement compiled dot and blkmm
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diff changeset
200 FloatNDArray z(dimz);
90bc0cc4518f implement compiled dot and blkmm
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parents:
diff changeset
201 if (! error_state)
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
202 F77_XFCN (sdot3, SDOT3, (m, n, k, x.data (), y.data (),
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
203 z.fortran_vec ()));
90bc0cc4518f implement compiled dot and blkmm
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parents:
diff changeset
204 retval = z;
90bc0cc4518f implement compiled dot and blkmm
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diff changeset
205 }
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
206 else
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
207 {
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
208 NDArray x = argx.array_value ();
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
209 NDArray y = argy.array_value ();
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
210 get_red_dims (dimx, dimy, dim, dimz, m, n, k);
90bc0cc4518f implement compiled dot and blkmm
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parents:
diff changeset
211 NDArray z(dimz);
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
212 if (! error_state)
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
213 F77_XFCN (ddot3, DDOT3, (m, n, k, x.data (), y.data (),
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
214 z.fortran_vec ()));
90bc0cc4518f implement compiled dot and blkmm
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parents:
diff changeset
215 retval = z;
90bc0cc4518f implement compiled dot and blkmm
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parents:
diff changeset
216 }
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
217 }
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
218 else
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
219 {
90bc0cc4518f implement compiled dot and blkmm
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parents:
diff changeset
220 // Non-optimized evaluation.
90bc0cc4518f implement compiled dot and blkmm
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parents:
diff changeset
221 octave_value_list tmp;
15239
a38d5ed5b3d8 dot.cc: Segfault with integers (bug #37199)
Max Brister <max@2bass.com>
parents: 15195
diff changeset
222 tmp(1) = dim + 1;
9874
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diff changeset
223 tmp(0) = do_binary_op (octave_value::op_el_mul, argx, argy);
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
224 if (! error_state)
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
225 {
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
226 tmp = feval ("sum", tmp, 1);
90bc0cc4518f implement compiled dot and blkmm
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parents:
diff changeset
227 if (! tmp.empty ())
90bc0cc4518f implement compiled dot and blkmm
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parents:
diff changeset
228 retval = tmp(0);
90bc0cc4518f implement compiled dot and blkmm
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parents:
diff changeset
229 }
90bc0cc4518f implement compiled dot and blkmm
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parents:
diff changeset
230 }
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
231 }
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
232 }
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
233 else
11553
01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory.
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
234 error ("dot: sizes of X and Y must match");
9874
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
235
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
236 }
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
237 else
11553
01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory.
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
238 error ("dot: X and Y must be numeric");
9874
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
239
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
240 return retval;
90bc0cc4518f implement compiled dot and blkmm
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parents:
diff changeset
241 }
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
242
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
243 /*
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
244 %!assert (dot ([1, 2], [2, 3]), 8)
12788
9f4b48b93f6d codesprint: Write test for dot.cc
Jordi Gutiérrez Hermoso <jordigh@gmail.com>
parents: 12642
diff changeset
245
9f4b48b93f6d codesprint: Write test for dot.cc
Jordi Gutiérrez Hermoso <jordigh@gmail.com>
parents: 12642
diff changeset
246 %!test
9f4b48b93f6d codesprint: Write test for dot.cc
Jordi Gutiérrez Hermoso <jordigh@gmail.com>
parents: 12642
diff changeset
247 %! x = [2, 1; 2, 1];
9f4b48b93f6d codesprint: Write test for dot.cc
Jordi Gutiérrez Hermoso <jordigh@gmail.com>
parents: 12642
diff changeset
248 %! y = [-0.5, 2; 0.5, -2];
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
249 %! assert (dot (x, y), [0 0]);
12788
9f4b48b93f6d codesprint: Write test for dot.cc
Jordi Gutiérrez Hermoso <jordigh@gmail.com>
parents: 12642
diff changeset
250
9f4b48b93f6d codesprint: Write test for dot.cc
Jordi Gutiérrez Hermoso <jordigh@gmail.com>
parents: 12642
diff changeset
251 %!test
14501
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
252 %! x = [1+i, 3-i; 1-i, 3-i];
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents: 14360
diff changeset
253 %! assert (dot (x, x), [4, 20]);
15239
a38d5ed5b3d8 dot.cc: Segfault with integers (bug #37199)
Max Brister <max@2bass.com>
parents: 15195
diff changeset
254
a38d5ed5b3d8 dot.cc: Segfault with integers (bug #37199)
Max Brister <max@2bass.com>
parents: 15195
diff changeset
255 %!test
a38d5ed5b3d8 dot.cc: Segfault with integers (bug #37199)
Max Brister <max@2bass.com>
parents: 15195
diff changeset
256 %! x = int8 ([1 2]);
a38d5ed5b3d8 dot.cc: Segfault with integers (bug #37199)
Max Brister <max@2bass.com>
parents: 15195
diff changeset
257 %! y = int8 ([2 3]);
a38d5ed5b3d8 dot.cc: Segfault with integers (bug #37199)
Max Brister <max@2bass.com>
parents: 15195
diff changeset
258 %! assert (dot (x, y), 8);
a38d5ed5b3d8 dot.cc: Segfault with integers (bug #37199)
Max Brister <max@2bass.com>
parents: 15195
diff changeset
259
a38d5ed5b3d8 dot.cc: Segfault with integers (bug #37199)
Max Brister <max@2bass.com>
parents: 15195
diff changeset
260 %!test
a38d5ed5b3d8 dot.cc: Segfault with integers (bug #37199)
Max Brister <max@2bass.com>
parents: 15195
diff changeset
261 %! x = int8 ([1 2; 3 4]);
a38d5ed5b3d8 dot.cc: Segfault with integers (bug #37199)
Max Brister <max@2bass.com>
parents: 15195
diff changeset
262 %! y = int8 ([5 6; 7 8]);
a38d5ed5b3d8 dot.cc: Segfault with integers (bug #37199)
Max Brister <max@2bass.com>
parents: 15195
diff changeset
263 %! assert (dot (x, y), [26 44]);
a38d5ed5b3d8 dot.cc: Segfault with integers (bug #37199)
Max Brister <max@2bass.com>
parents: 15195
diff changeset
264 %! assert (dot (x, y, 2), [17; 53]);
a38d5ed5b3d8 dot.cc: Segfault with integers (bug #37199)
Max Brister <max@2bass.com>
parents: 15195
diff changeset
265 %! assert (dot (x, y, 3), [5 12; 21 32]);
a38d5ed5b3d8 dot.cc: Segfault with integers (bug #37199)
Max Brister <max@2bass.com>
parents: 15195
diff changeset
266
9874
90bc0cc4518f implement compiled dot and blkmm
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parents:
diff changeset
267 */
90bc0cc4518f implement compiled dot and blkmm
Jaroslav Hajek <highegg@gmail.com>
parents:
diff changeset
268
15039
e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory
Rik <rik@octave.org>
parents: 14501
diff changeset
269 DEFUN (blkmm, args, ,
17787
175b392e91fe Use GNU style coding conventions for code in libinterp/
Rik <rik@octave.org>
parents: 17744
diff changeset
270 "-*- texinfo -*-\n\
15039
e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory
Rik <rik@octave.org>
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271 @deftypefn {Built-in Function} {} blkmm (@var{A}, @var{B})\n\
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272 Compute products of matrix blocks. The blocks are given as\n\
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273 2-dimensional subarrays of the arrays @var{A}, @var{B}.\n\
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274 The size of @var{A} must have the form @code{[m,k,@dots{}]} and\n\
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275 size of @var{B} must be @code{[k,n,@dots{}]}. The result is\n\
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276 then of size @code{[m,n,@dots{}]} and is computed as follows:\n\
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277 \n\
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278 @example\n\
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279 @group\n\
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280 for i = 1:prod (size (@var{A})(3:end))\n\
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281 @var{C}(:,:,i) = @var{A}(:,:,i) * @var{B}(:,:,i)\n\
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282 endfor\n\
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283 @end group\n\
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284 @end example\n\
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285 @end deftypefn")
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286 {
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287 octave_value retval;
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288 int nargin = args.length ();
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289
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290 if (nargin != 2)
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291 {
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292 print_usage ();
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293 return retval;
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294 }
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295
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296 octave_value argx = args(0);
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297 octave_value argy = args(1);
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298
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299 if (argx.is_numeric_type () && argy.is_numeric_type ())
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300 {
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301 const dim_vector dimx = argx.dims ();
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302 const dim_vector dimy = argy.dims ();
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303 int nd = dimx.length ();
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304 octave_idx_type m = dimx(0);
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305 octave_idx_type k = dimx(1);
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306 octave_idx_type n = dimy(1);
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307 octave_idx_type np = 1;
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308 bool match = dimy(0) == k && nd == dimy.length ();
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309 dim_vector dimz = dim_vector::alloc (nd);
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310 dimz(0) = m;
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311 dimz(1) = n;
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312 for (int i = 2; match && i < nd; i++)
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313 {
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314 match = match && dimx(i) == dimy(i);
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315 dimz(i) = dimx(i);
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316 np *= dimz(i);
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317 }
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318
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319 if (match)
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320 {
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321 if (argx.is_complex_type () || argy.is_complex_type ())
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322 {
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323 if (argx.is_single_type () || argy.is_single_type ())
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324 {
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325 FloatComplexNDArray x = argx.float_complex_array_value ();
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326 FloatComplexNDArray y = argy.float_complex_array_value ();
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327 FloatComplexNDArray z(dimz);
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328 if (! error_state)
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329 F77_XFCN (cmatm3, CMATM3, (m, n, k, np,
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330 x.data (), y.data (),
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331 z.fortran_vec ()));
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332 retval = z;
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333 }
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334 else
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335 {
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336 ComplexNDArray x = argx.complex_array_value ();
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337 ComplexNDArray y = argy.complex_array_value ();
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338 ComplexNDArray z(dimz);
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339 if (! error_state)
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340 F77_XFCN (zmatm3, ZMATM3, (m, n, k, np,
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341 x.data (), y.data (),
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342 z.fortran_vec ()));
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343 retval = z;
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344 }
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345 }
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346 else
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347 {
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348 if (argx.is_single_type () || argy.is_single_type ())
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349 {
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350 FloatNDArray x = argx.float_array_value ();
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351 FloatNDArray y = argy.float_array_value ();
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352 FloatNDArray z(dimz);
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353 if (! error_state)
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354 F77_XFCN (smatm3, SMATM3, (m, n, k, np,
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355 x.data (), y.data (),
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356 z.fortran_vec ()));
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357 retval = z;
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358 }
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359 else
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360 {
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361 NDArray x = argx.array_value ();
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362 NDArray y = argy.array_value ();
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363 NDArray z(dimz);
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364 if (! error_state)
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365 F77_XFCN (dmatm3, DMATM3, (m, n, k, np,
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366 x.data (), y.data (),
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367 z.fortran_vec ()));
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368 retval = z;
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369 }
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370 }
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371 }
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372 else
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373 error ("blkmm: A and B dimensions don't match: (%s) and (%s)",
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374 dimx.str ().c_str (), dimy.str ().c_str ());
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375
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376 }
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377 else
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378 error ("blkmm: A and B must be numeric");
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379
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380 return retval;
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381 }
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382
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383 /*
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384 %!test
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385 %! x(:,:,1) = [1 2; 3 4];
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386 %! x(:,:,2) = [1 1; 1 1];
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387 %! z(:,:,1) = [7 10; 15 22];
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388 %! z(:,:,2) = [2 2; 2 2];
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389 %! assert (blkmm (x,x), z);
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diff changeset
390 */