Mercurial > octave-nkf
annotate src/pt-cbinop.cc @ 8874:bd1b1fe9c6e9 ss-3-1-53
bump version info for snapshot
author | John W. Eaton <jwe@octave.org> |
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date | Wed, 25 Feb 2009 18:35:47 -0500 |
parents | 73c4516fae10 |
children | eb63fbe60fab |
rev | line source |
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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 octave_value |
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114 tree_compound_binary_expression::rvalue1 (int) |
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115 { |
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116 octave_value retval; |
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117 |
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118 if (error_state) |
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119 return retval; |
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120 |
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121 if (op_lhs) |
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122 { |
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123 octave_value a = op_lhs->rvalue1 (); |
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124 |
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125 if (! error_state && a.is_defined () && op_rhs) |
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126 { |
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127 octave_value b = op_rhs->rvalue1 (); |
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128 |
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129 if (! error_state && b.is_defined ()) |
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130 { |
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131 retval = ::do_binary_op (etype, a, b); |
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132 |
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133 if (error_state) |
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134 retval = octave_value (); |
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135 } |
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136 } |
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137 } |
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138 |
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139 return retval; |
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140 } |
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141 |
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142 |