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annotate liboctave/bsxfun-defs.cc @ 12312:b10ea6efdc58 release-3-4-x ss-3-3-91

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version is now 3.3.91
author John W. Eaton <jwe@octave.org>
date Mon, 31 Jan 2011 08:36:58 -0500
parents 12df7854fa7c
children 15eefbd9d4e8
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1 /*
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2
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3 Copyright (C) 2009-2011 Jaroslav Hajek
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4 Copyright (C) 2009 VZLU Prague
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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 #if !defined (octave_bsxfun_defs_h)
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25 #define octave_bsxfun_defs_h 1
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26
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27 #include <algorithm>
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28 #include <iostream>
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29
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30 #include "dim-vector.h"
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31 #include "oct-locbuf.h"
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32 #include "lo-error.h"
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33
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34 #include "mx-inlines.cc"
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35
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36 template <class R, class X, class Y>
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37 Array<R>
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38 do_bsxfun_op (const Array<X>& x, const Array<Y>& y,
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39 void (*op_vv) (size_t, R *, const X *, const Y *),
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40 void (*op_sv) (size_t, R *, X, const Y *),
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41 void (*op_vs) (size_t, R *, const X *, Y))
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42 {
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43 int nd = std::max (x.ndims (), y.ndims ());
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44 dim_vector dvx = x.dims ().redim (nd), dvy = y.dims ().redim (nd);
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45
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46 // Construct the result dimensions.
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47 dim_vector dvr;
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48 dvr.resize (nd);
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49 for (int i = 0; i < nd; i++)
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50 {
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51 octave_idx_type xk = dvx(i), yk = dvy(i);
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52 if (xk == 1)
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53 dvr(i) = yk;
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54 else if (yk == 1 || xk == yk)
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55 dvr(i) = xk;
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56 else
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57 {
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58 (*current_liboctave_error_handler)
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59 ("bsxfun: nonconformant dimensions: %s and %s",
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60 x.dims ().str ().c_str (), y.dims ().str ().c_str ());
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61 break;
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62 }
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63 }
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64
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65 Array<R> retval (dvr);
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66
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67 const X *xvec = x.fortran_vec ();
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68 const Y *yvec = y.fortran_vec ();
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69 R *rvec = retval.fortran_vec ();
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70
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71 // Fold the common leading dimensions.
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72 int start;
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73 octave_idx_type ldr = 1;
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74 for (start = 0; start < nd; start++)
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75 {
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76 if (dvx(start) != dvy(start))
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77 break;
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78 ldr *= dvr(start);
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79 }
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80
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81 if (retval.is_empty ())
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82 ; // do nothing
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83 else if (start == nd)
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84 op_vv (retval.numel (), rvec, xvec, yvec);
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85 else
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86 {
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87 // Determine the type of the low-level loop.
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88 bool xsing = false, ysing = false;
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89 if (ldr == 1)
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90 {
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91 xsing = dvx(start) == 1;
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92 ysing = dvy(start) == 1;
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93 if (xsing || ysing)
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94 {
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95 ldr *= dvx(start) * dvy(start);
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96 start++;
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97 }
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98 }
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99 dim_vector cdvx = dvx.cumulative (), cdvy = dvy.cumulative ();
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100 // Nullify singleton dims to achieve a spread effect.
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101 for (int i = std::max (start, 1); i < nd; i++)
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102 {
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103 if (dvx(i) == 1)
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104 cdvx(i-1) = 0;
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105 if (dvy(i) == 1)
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106 cdvy(i-1) = 0;
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107 }
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108
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109 octave_idx_type niter = dvr.numel (start);
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110 // The index array.
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111 OCTAVE_LOCAL_BUFFER_INIT (octave_idx_type, idx, nd, 0);
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112 for (octave_idx_type iter = 0; iter < niter; iter++)
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113 {
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114 octave_quit ();
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115
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116 // Compute indices.
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117 // FIXME: performance impact noticeable?
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118 octave_idx_type xidx = cdvx.cum_compute_index (idx);
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119 octave_idx_type yidx = cdvy.cum_compute_index (idx);
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120 octave_idx_type ridx = dvr.compute_index (idx);
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121
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122 // Apply the low-level loop.
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123 if (xsing)
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124 op_sv (ldr, rvec + ridx, xvec[xidx], yvec + yidx);
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125 else if (ysing)
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126 op_vs (ldr, rvec + ridx, xvec + xidx, yvec[yidx]);
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127 else
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128 op_vv (ldr, rvec + ridx, xvec + xidx, yvec + yidx);
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129
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130 dvr.increment_index (idx + start, start);
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131 }
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132 }
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133
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134 return retval;
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135 }
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136
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137 #define BSXFUN_OP_DEF(OP, ARRAY) \
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138 ARRAY bsxfun_ ## OP (const ARRAY& x, const ARRAY& y)
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139
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140 #define BSXFUN_OP2_DEF(OP, ARRAY, ARRAY1, ARRAY2) \
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141 ARRAY bsxfun_ ## OP (const ARRAY1& x, const ARRAY2& y)
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142
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143 #define BSXFUN_REL_DEF(OP, ARRAY) \
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144 boolNDArray bsxfun_ ## OP (const ARRAY& x, const ARRAY& y)
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145
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146 #define BSXFUN_OP_DEF_MXLOOP(OP, ARRAY, LOOP) \
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147 BSXFUN_OP_DEF(OP, ARRAY) \
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148 { return do_bsxfun_op<ARRAY::element_type, ARRAY::element_type, ARRAY::element_type> \
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149 (x, y, LOOP, LOOP, LOOP); }
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150
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151 #define BSXFUN_OP2_DEF_MXLOOP(OP, ARRAY, ARRAY1, ARRAY2, LOOP) \
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152 BSXFUN_OP2_DEF(OP, ARRAY, ARRAY1, ARRAY2) \
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153 { return do_bsxfun_op<ARRAY::element_type, ARRAY1::element_type, ARRAY2::element_type> \
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154 (x, y, LOOP, LOOP, LOOP); }
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155
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156 #define BSXFUN_REL_DEF_MXLOOP(OP, ARRAY, LOOP) \
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157 BSXFUN_REL_DEF(OP, ARRAY) \
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158 { return do_bsxfun_op<bool, ARRAY::element_type, ARRAY::element_type> \
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159 (x, y, LOOP, LOOP, LOOP); }
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160
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161 #define BSXFUN_STDOP_DEFS_MXLOOP(ARRAY) \
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162 BSXFUN_OP_DEF_MXLOOP (add, ARRAY, mx_inline_add) \
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163 BSXFUN_OP_DEF_MXLOOP (sub, ARRAY, mx_inline_sub) \
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164 BSXFUN_OP_DEF_MXLOOP (mul, ARRAY, mx_inline_mul) \
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165 BSXFUN_OP_DEF_MXLOOP (div, ARRAY, mx_inline_div) \
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166 BSXFUN_OP_DEF_MXLOOP (min, ARRAY, mx_inline_xmin) \
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167 BSXFUN_OP_DEF_MXLOOP (max, ARRAY, mx_inline_xmax) \
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168
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169 #define BSXFUN_STDREL_DEFS_MXLOOP(ARRAY) \
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170 BSXFUN_REL_DEF_MXLOOP (eq, ARRAY, mx_inline_eq) \
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171 BSXFUN_REL_DEF_MXLOOP (ne, ARRAY, mx_inline_ne) \
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172 BSXFUN_REL_DEF_MXLOOP (lt, ARRAY, mx_inline_lt) \
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173 BSXFUN_REL_DEF_MXLOOP (le, ARRAY, mx_inline_le) \
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174 BSXFUN_REL_DEF_MXLOOP (gt, ARRAY, mx_inline_gt) \
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175 BSXFUN_REL_DEF_MXLOOP (ge, ARRAY, mx_inline_ge)
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176
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177 #endif