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support for compound operators, implement trans_mul, mul_trans, herm_mul and mul_herm
author Jaroslav Hajek <highegg@gmail.com>
date Wed, 07 May 2008 16:33:15 +0200
parents
children 3100283874d7
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7800
5861b95e9879 support for compound operators, implement trans_mul, mul_trans, herm_mul and mul_herm
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1 /*
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2
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3 Copyright (C) 2008 Jaroslav Hajek
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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 "error.h"
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28 #include "oct-obj.h"
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29 #include "ov.h"
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30 #include "pt-cbinop.h"
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31 #include "pt-bp.h"
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32 #include "pt-unop.h"
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33 #include "pt-walk.h"
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34
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35 // If a tree expression is a transpose or hermitian transpose, return
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36 // the argument and corresponding operator.
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37
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38 static octave_value::unary_op
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39 strip_trans_herm (tree_expression *&exp)
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40 {
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41 if (exp->is_unary_expression ())
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42 {
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43 tree_unary_expression *uexp =
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44 dynamic_cast<tree_unary_expression *> (exp);
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45
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46 octave_value::unary_op op = uexp->op_type ();
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47
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48 if (op == octave_value::op_transpose
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49 || op == octave_value::op_hermitian)
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50 exp = uexp->operand ();
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51 else
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52 op = octave_value::unknown_unary_op;
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53
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54 return op;
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55 }
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56 else
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57 return octave_value::unknown_unary_op;
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58 }
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59
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60 // Possibly convert multiplication to trans_mul, mul_trans, herm_mul,
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61 // or mul_herm.
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62
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63 static octave_value::compound_binary_op
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64 simplify_mul_op (tree_expression *&a, tree_expression *&b)
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65 {
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66 octave_value::compound_binary_op retop;
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67 octave_value::unary_op opa = strip_trans_herm (a);
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68
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69 if (opa == octave_value::op_hermitian)
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70 retop = octave_value::op_herm_mul;
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71 else if (opa == octave_value::op_transpose)
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72 retop = octave_value::op_trans_mul;
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73 else
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74 {
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75 octave_value::unary_op opb = strip_trans_herm (b);
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76
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77 if (opb == octave_value::op_hermitian)
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78 retop = octave_value::op_mul_herm;
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79 else if (opb == octave_value::op_transpose)
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80 retop = octave_value::op_mul_trans;
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81 else
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82 retop = octave_value::unknown_compound_binary_op;
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83 }
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84
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85 return retop;
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86 }
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87
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88 tree_binary_expression *
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89 maybe_compound_binary_expression (tree_expression *a, tree_expression *b,
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90 int l, int c, octave_value::binary_op t)
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91 {
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92 tree_expression *ca = a, *cb = b;
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93 octave_value::compound_binary_op ct;
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94
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95 switch (t)
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96 {
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97 case octave_value::op_mul:
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98 ct = simplify_mul_op (ca, cb);
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99 break;
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100
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101 default:
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102 ct = octave_value::unknown_compound_binary_op;
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103 break;
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104 }
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105
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106 tree_binary_expression *ret = (ct == octave_value::unknown_compound_binary_op)
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107 ? new tree_binary_expression (a, b, l, c, t)
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108 : new tree_compound_binary_expression (a, b, l, c, t, ca, cb, ct);
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109
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110 return ret;
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111 }
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112
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113
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114 octave_value
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115 tree_compound_binary_expression::rvalue (void)
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116 {
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117 octave_value retval;
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118
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119 MAYBE_DO_BREAKPOINT;
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120
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121 if (error_state)
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122 return retval;
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123
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124 if (op_lhs)
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125 {
5861b95e9879 support for compound operators, implement trans_mul, mul_trans, herm_mul and mul_herm
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126 octave_value a = op_lhs->rvalue ();
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127
5861b95e9879 support for compound operators, implement trans_mul, mul_trans, herm_mul and mul_herm
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128 if (error_state)
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129 eval_error ();
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130 else if (a.is_defined () && op_rhs)
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131 {
5861b95e9879 support for compound operators, implement trans_mul, mul_trans, herm_mul and mul_herm
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132 octave_value b = op_rhs->rvalue ();
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133
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134 if (error_state)
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135 eval_error ();
5861b95e9879 support for compound operators, implement trans_mul, mul_trans, herm_mul and mul_herm
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136 else if (b.is_defined ())
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137 {
5861b95e9879 support for compound operators, implement trans_mul, mul_trans, herm_mul and mul_herm
Jaroslav Hajek <highegg@gmail.com>
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138 retval = ::do_binary_op (etype, a, b);
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139
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140 if (error_state)
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141 {
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Jaroslav Hajek <highegg@gmail.com>
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142 retval = octave_value ();
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143 eval_error ();
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144 }
5861b95e9879 support for compound operators, implement trans_mul, mul_trans, herm_mul and mul_herm
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145 }
5861b95e9879 support for compound operators, implement trans_mul, mul_trans, herm_mul and mul_herm
Jaroslav Hajek <highegg@gmail.com>
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146 else
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Jaroslav Hajek <highegg@gmail.com>
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147 eval_error ();
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148 }
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149 else
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150 eval_error ();
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151 }
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152 else
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153 eval_error ();
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154
5861b95e9879 support for compound operators, implement trans_mul, mul_trans, herm_mul and mul_herm
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155 return retval;
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156 }
5861b95e9879 support for compound operators, implement trans_mul, mul_trans, herm_mul and mul_herm
Jaroslav Hajek <highegg@gmail.com>
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157
5861b95e9879 support for compound operators, implement trans_mul, mul_trans, herm_mul and mul_herm
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158