145
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1
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2 /* Implementation of the FINDLOC intrinsic
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3 Copyright (C) 2018-2020 Free Software Foundation, Inc.
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4 Contributed by Thomas König <tk@tkoenig.net>
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5
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6 This file is part of the GNU Fortran 95 runtime library (libgfortran).
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7
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8 Libgfortran is free software; you can redistribute it and/or
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9 modify it under the terms of the GNU General Public
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10 License as published by the Free Software Foundation; either
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11 version 3 of the License, or (at your option) any later version.
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12
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13 Libgfortran is distributed in the hope that it will be useful,
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 GNU General Public License for more details.
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17
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18 Under Section 7 of GPL version 3, you are granted additional
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19 permissions described in the GCC Runtime Library Exception, version
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20 3.1, as published by the Free Software Foundation.
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21
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22 You should have received a copy of the GNU General Public License and
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23 a copy of the GCC Runtime Library Exception along with this program;
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24 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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25 <http://www.gnu.org/licenses/>. */
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26
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27 #include "libgfortran.h"
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28 #include <assert.h>
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29
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30 #if defined (HAVE_GFC_INTEGER_16)
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31 extern void findloc0_i16 (gfc_array_index_type * const restrict retarray,
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32 gfc_array_i16 * const restrict array, GFC_INTEGER_16 value,
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33 GFC_LOGICAL_4);
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34 export_proto(findloc0_i16);
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35
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36 void
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37 findloc0_i16 (gfc_array_index_type * const restrict retarray,
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38 gfc_array_i16 * const restrict array, GFC_INTEGER_16 value,
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39 GFC_LOGICAL_4 back)
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40 {
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41 index_type count[GFC_MAX_DIMENSIONS];
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42 index_type extent[GFC_MAX_DIMENSIONS];
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43 index_type sstride[GFC_MAX_DIMENSIONS];
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44 index_type dstride;
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45 const GFC_INTEGER_16 *base;
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46 index_type * restrict dest;
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47 index_type rank;
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48 index_type n;
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49 index_type sz;
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50
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51 rank = GFC_DESCRIPTOR_RANK (array);
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52 if (rank <= 0)
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53 runtime_error ("Rank of array needs to be > 0");
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54
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55 if (retarray->base_addr == NULL)
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56 {
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57 GFC_DIMENSION_SET(retarray->dim[0], 0, rank-1, 1);
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58 retarray->dtype.rank = 1;
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59 retarray->offset = 0;
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60 retarray->base_addr = xmallocarray (rank, sizeof (index_type));
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61 }
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62 else
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63 {
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64 if (unlikely (compile_options.bounds_check))
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65 bounds_iforeach_return ((array_t *) retarray, (array_t *) array,
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66 "FINDLOC");
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67 }
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68
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69 dstride = GFC_DESCRIPTOR_STRIDE(retarray,0);
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70 dest = retarray->base_addr;
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71
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72 /* Set the return value. */
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73 for (n = 0; n < rank; n++)
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74 dest[n * dstride] = 0;
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75
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76 sz = 1;
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77 for (n = 0; n < rank; n++)
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78 {
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79 sstride[n] = GFC_DESCRIPTOR_STRIDE(array,n);
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80 extent[n] = GFC_DESCRIPTOR_EXTENT(array,n);
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81 sz *= extent[n];
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82 if (extent[n] <= 0)
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83 return;
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84 }
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85
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86 for (n = 0; n < rank; n++)
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87 count[n] = 0;
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88
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89 if (back)
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90 {
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91 base = array->base_addr + (sz - 1) * 1;
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92
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93 while (1)
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94 {
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95 do
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96 {
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97 if (unlikely(*base == value))
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98 {
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99 for (n = 0; n < rank; n++)
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100 dest[n * dstride] = extent[n] - count[n];
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101
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102 return;
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103 }
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104 base -= sstride[0] * 1;
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105 } while(++count[0] != extent[0]);
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106
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107 n = 0;
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108 do
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109 {
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110 /* When we get to the end of a dimension, reset it and increment
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111 the next dimension. */
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112 count[n] = 0;
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113 /* We could precalculate these products, but this is a less
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114 frequently used path so probably not worth it. */
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115 base += sstride[n] * extent[n] * 1;
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116 n++;
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117 if (n >= rank)
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118 return;
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119 else
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120 {
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121 count[n]++;
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122 base -= sstride[n] * 1;
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123 }
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124 } while (count[n] == extent[n]);
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125 }
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126 }
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127 else
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128 {
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129 base = array->base_addr;
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130 while (1)
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131 {
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132 do
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133 {
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134 if (unlikely(*base == value))
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135 {
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136 for (n = 0; n < rank; n++)
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137 dest[n * dstride] = count[n] + 1;
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138
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139 return;
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140 }
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141 base += sstride[0] * 1;
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142 } while(++count[0] != extent[0]);
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143
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144 n = 0;
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145 do
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146 {
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147 /* When we get to the end of a dimension, reset it and increment
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148 the next dimension. */
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149 count[n] = 0;
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150 /* We could precalculate these products, but this is a less
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151 frequently used path so probably not worth it. */
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152 base -= sstride[n] * extent[n] * 1;
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153 n++;
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154 if (n >= rank)
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155 return;
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156 else
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157 {
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158 count[n]++;
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159 base += sstride[n] * 1;
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160 }
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161 } while (count[n] == extent[n]);
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162 }
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163 }
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164 return;
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165 }
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166
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167 extern void mfindloc0_i16 (gfc_array_index_type * const restrict retarray,
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168 gfc_array_i16 * const restrict array, GFC_INTEGER_16 value,
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169 gfc_array_l1 *const restrict, GFC_LOGICAL_4);
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170 export_proto(mfindloc0_i16);
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171
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172 void
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173 mfindloc0_i16 (gfc_array_index_type * const restrict retarray,
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174 gfc_array_i16 * const restrict array, GFC_INTEGER_16 value,
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175 gfc_array_l1 *const restrict mask, GFC_LOGICAL_4 back)
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176 {
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177 index_type count[GFC_MAX_DIMENSIONS];
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178 index_type extent[GFC_MAX_DIMENSIONS];
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179 index_type sstride[GFC_MAX_DIMENSIONS];
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180 index_type mstride[GFC_MAX_DIMENSIONS];
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181 index_type dstride;
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182 const GFC_INTEGER_16 *base;
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183 index_type * restrict dest;
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184 GFC_LOGICAL_1 *mbase;
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185 index_type rank;
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186 index_type n;
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187 int mask_kind;
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188 index_type sz;
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189
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190 rank = GFC_DESCRIPTOR_RANK (array);
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191 if (rank <= 0)
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192 runtime_error ("Rank of array needs to be > 0");
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193
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194 if (retarray->base_addr == NULL)
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195 {
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196 GFC_DIMENSION_SET(retarray->dim[0], 0, rank-1, 1);
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197 retarray->dtype.rank = 1;
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198 retarray->offset = 0;
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199 retarray->base_addr = xmallocarray (rank, sizeof (index_type));
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200 }
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201 else
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202 {
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203 if (unlikely (compile_options.bounds_check))
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204 {
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205 bounds_iforeach_return ((array_t *) retarray, (array_t *) array,
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206 "FINDLOC");
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207 bounds_equal_extents ((array_t *) mask, (array_t *) array,
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208 "MASK argument", "FINDLOC");
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209 }
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210 }
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211
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212 mask_kind = GFC_DESCRIPTOR_SIZE (mask);
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213
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214 mbase = mask->base_addr;
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215
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216 if (mask_kind == 1 || mask_kind == 2 || mask_kind == 4 || mask_kind == 8
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217 #ifdef HAVE_GFC_LOGICAL_16
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218 || mask_kind == 16
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219 #endif
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220 )
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221 mbase = GFOR_POINTER_TO_L1 (mbase, mask_kind);
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222 else
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223 internal_error (NULL, "Funny sized logical array");
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224
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225 dstride = GFC_DESCRIPTOR_STRIDE(retarray,0);
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226 dest = retarray->base_addr;
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227
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228 /* Set the return value. */
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229 for (n = 0; n < rank; n++)
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230 dest[n * dstride] = 0;
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231
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232 sz = 1;
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233 for (n = 0; n < rank; n++)
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234 {
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235 sstride[n] = GFC_DESCRIPTOR_STRIDE(array,n);
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236 mstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(mask,n);
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237 extent[n] = GFC_DESCRIPTOR_EXTENT(array,n);
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238 sz *= extent[n];
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239 if (extent[n] <= 0)
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240 return;
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241 }
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242
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243 for (n = 0; n < rank; n++)
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244 count[n] = 0;
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245
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246 if (back)
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247 {
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248 base = array->base_addr + (sz - 1) * 1;
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249 mbase = mbase + (sz - 1) * mask_kind;
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250 while (1)
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251 {
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252 do
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253 {
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254 if (unlikely(*mbase && *base == value))
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255 {
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256 for (n = 0; n < rank; n++)
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257 dest[n * dstride] = extent[n] - count[n];
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258
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259 return;
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260 }
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261 base -= sstride[0] * 1;
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262 mbase -= mstride[0];
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263 } while(++count[0] != extent[0]);
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264
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265 n = 0;
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266 do
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267 {
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268 /* When we get to the end of a dimension, reset it and increment
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269 the next dimension. */
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270 count[n] = 0;
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271 /* We could precalculate these products, but this is a less
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272 frequently used path so probably not worth it. */
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273 base += sstride[n] * extent[n] * 1;
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274 mbase -= mstride[n] * extent[n];
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275 n++;
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276 if (n >= rank)
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277 return;
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278 else
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279 {
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280 count[n]++;
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281 base -= sstride[n] * 1;
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282 mbase += mstride[n];
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283 }
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284 } while (count[n] == extent[n]);
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285 }
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286 }
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287 else
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288 {
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289 base = array->base_addr;
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290 while (1)
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291 {
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292 do
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293 {
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294 if (unlikely(*mbase && *base == value))
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295 {
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296 for (n = 0; n < rank; n++)
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297 dest[n * dstride] = count[n] + 1;
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298
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299 return;
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300 }
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301 base += sstride[0] * 1;
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302 mbase += mstride[0];
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303 } while(++count[0] != extent[0]);
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304
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305 n = 0;
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306 do
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307 {
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308 /* When we get to the end of a dimension, reset it and increment
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309 the next dimension. */
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310 count[n] = 0;
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311 /* We could precalculate these products, but this is a less
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312 frequently used path so probably not worth it. */
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313 base -= sstride[n] * extent[n] * 1;
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314 mbase -= mstride[n] * extent[n];
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315 n++;
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316 if (n >= rank)
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317 return;
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318 else
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319 {
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320 count[n]++;
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321 base += sstride[n]* 1;
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322 mbase += mstride[n];
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323 }
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324 } while (count[n] == extent[n]);
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325 }
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326 }
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327 return;
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328 }
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329
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330 extern void sfindloc0_i16 (gfc_array_index_type * const restrict retarray,
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331 gfc_array_i16 * const restrict array, GFC_INTEGER_16 value,
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332 GFC_LOGICAL_4 *, GFC_LOGICAL_4);
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333 export_proto(sfindloc0_i16);
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334
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335 void
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336 sfindloc0_i16 (gfc_array_index_type * const restrict retarray,
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337 gfc_array_i16 * const restrict array, GFC_INTEGER_16 value,
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338 GFC_LOGICAL_4 * mask, GFC_LOGICAL_4 back)
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339 {
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340 index_type rank;
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341 index_type dstride;
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342 index_type * restrict dest;
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343 index_type n;
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344
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345 if (mask == NULL || *mask)
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346 {
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347 findloc0_i16 (retarray, array, value, back);
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348 return;
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349 }
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350
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351 rank = GFC_DESCRIPTOR_RANK (array);
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352
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353 if (rank <= 0)
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354 internal_error (NULL, "Rank of array needs to be > 0");
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355
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356 if (retarray->base_addr == NULL)
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357 {
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358 GFC_DIMENSION_SET(retarray->dim[0], 0, rank-1, 1);
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359 retarray->dtype.rank = 1;
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360 retarray->offset = 0;
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361 retarray->base_addr = xmallocarray (rank, sizeof (index_type));
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362 }
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363 else if (unlikely (compile_options.bounds_check))
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364 {
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365 bounds_iforeach_return ((array_t *) retarray, (array_t *) array,
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366 "FINDLOC");
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367 }
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368
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369 dstride = GFC_DESCRIPTOR_STRIDE(retarray,0);
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370 dest = retarray->base_addr;
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371 for (n = 0; n<rank; n++)
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372 dest[n * dstride] = 0 ;
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373 }
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374
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375 #endif
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