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111
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1 /* Implementation of the CSHIFT intrinsic
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2 Copyright (C) 2003-2017 Free Software Foundation, Inc.
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3 Contributed by Feng Wang <wf_cs@yahoo.com>
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4
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5 This file is part of the GNU Fortran runtime library (libgfortran).
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6
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7 Libgfortran is free software; you can redistribute it and/or
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8 modify it under the terms of the GNU General Public
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9 License as published by the Free Software Foundation; either
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10 version 3 of the License, or (at your option) any later version.
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11
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12 Ligbfortran is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 Under Section 7 of GPL version 3, you are granted additional
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18 permissions described in the GCC Runtime Library Exception, version
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19 3.1, as published by the Free Software Foundation.
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20
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21 You should have received a copy of the GNU General Public License and
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22 a copy of the GCC Runtime Library Exception along with this program;
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23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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24 <http://www.gnu.org/licenses/>. */
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25
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26 #include "libgfortran.h"
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27 #include <string.h>
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28
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29
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30 #if defined (HAVE_GFC_INTEGER_16)
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31
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32 static void
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33 cshift1 (gfc_array_char * const restrict ret,
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34 const gfc_array_char * const restrict array,
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35 const gfc_array_i16 * const restrict h,
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36 const GFC_INTEGER_16 * const restrict pwhich)
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37 {
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38 /* r.* indicates the return array. */
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39 index_type rstride[GFC_MAX_DIMENSIONS];
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40 index_type rstride0;
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41 index_type roffset;
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42 char *rptr;
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43 char *dest;
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44 /* s.* indicates the source array. */
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45 index_type sstride[GFC_MAX_DIMENSIONS];
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46 index_type sstride0;
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47 index_type soffset;
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48 const char *sptr;
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49 const char *src;
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50 /* h.* indicates the shift array. */
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51 index_type hstride[GFC_MAX_DIMENSIONS];
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52 index_type hstride0;
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53 const GFC_INTEGER_16 *hptr;
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54
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55 index_type count[GFC_MAX_DIMENSIONS];
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56 index_type extent[GFC_MAX_DIMENSIONS];
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57 index_type dim;
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58 index_type len;
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59 index_type n;
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60 int which;
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61 GFC_INTEGER_16 sh;
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62 index_type arraysize;
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63 index_type size;
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64 index_type type_size;
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65
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66 if (pwhich)
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67 which = *pwhich - 1;
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68 else
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69 which = 0;
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70
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71 if (which < 0 || (which + 1) > GFC_DESCRIPTOR_RANK (array))
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72 runtime_error ("Argument 'DIM' is out of range in call to 'CSHIFT'");
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73
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74 size = GFC_DESCRIPTOR_SIZE(array);
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75
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76 arraysize = size0 ((array_t *)array);
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77
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78 if (ret->base_addr == NULL)
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79 {
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80 int i;
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81
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82 ret->base_addr = xmallocarray (arraysize, size);
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83 ret->offset = 0;
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84 ret->dtype = array->dtype;
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85 for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
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86 {
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87 index_type ub, str;
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88
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89 ub = GFC_DESCRIPTOR_EXTENT(array,i) - 1;
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90
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91 if (i == 0)
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92 str = 1;
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93 else
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94 str = GFC_DESCRIPTOR_EXTENT(ret,i-1) *
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95 GFC_DESCRIPTOR_STRIDE(ret,i-1);
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96
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97 GFC_DIMENSION_SET(ret->dim[i], 0, ub, str);
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98 }
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99 }
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100 else if (unlikely (compile_options.bounds_check))
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101 {
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102 bounds_equal_extents ((array_t *) ret, (array_t *) array,
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103 "return value", "CSHIFT");
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104 }
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105
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106 if (unlikely (compile_options.bounds_check))
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107 {
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108 bounds_reduced_extents ((array_t *) h, (array_t *) array, which,
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109 "SHIFT argument", "CSHIFT");
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110 }
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111
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112 if (arraysize == 0)
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113 return;
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114
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115 /* See if we should dispatch to a helper function. */
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116
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117 type_size = GFC_DTYPE_TYPE_SIZE (array);
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118
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119 switch (type_size)
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120 {
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121 case GFC_DTYPE_LOGICAL_1:
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122 case GFC_DTYPE_INTEGER_1:
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123 case GFC_DTYPE_DERIVED_1:
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124 cshift1_16_i1 ((gfc_array_i1 *)ret, (gfc_array_i1 *) array,
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125 h, pwhich);
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126 return;
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127
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128 case GFC_DTYPE_LOGICAL_2:
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129 case GFC_DTYPE_INTEGER_2:
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130 cshift1_16_i2 ((gfc_array_i2 *)ret, (gfc_array_i2 *) array,
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131 h, pwhich);
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132 return;
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133
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134 case GFC_DTYPE_LOGICAL_4:
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135 case GFC_DTYPE_INTEGER_4:
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136 cshift1_16_i4 ((gfc_array_i4 *)ret, (gfc_array_i4 *) array,
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137 h, pwhich);
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138 return;
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139
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140 case GFC_DTYPE_LOGICAL_8:
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141 case GFC_DTYPE_INTEGER_8:
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142 cshift1_16_i8 ((gfc_array_i8 *)ret, (gfc_array_i8 *) array,
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143 h, pwhich);
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144 return;
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145
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146 #if defined (HAVE_INTEGER_16)
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147 case GFC_DTYPE_LOGICAL_16:
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148 case GFC_DTYPE_INTEGER_16:
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149 cshift1_16_i16 ((gfc_array_i16 *)ret, (gfc_array_i16 *) array,
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150 h, pwhich);
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151 return;
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152 #endif
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153
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154 case GFC_DTYPE_REAL_4:
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155 cshift1_16_r4 ((gfc_array_r4 *)ret, (gfc_array_r4 *) array,
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156 h, pwhich);
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157 return;
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158
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159 case GFC_DTYPE_REAL_8:
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160 cshift1_16_r8 ((gfc_array_r8 *)ret, (gfc_array_r8 *) array,
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161 h, pwhich);
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162 return;
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163
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164 #if defined (HAVE_REAL_10)
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165 case GFC_DTYPE_REAL_10:
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166 cshift1_16_r10 ((gfc_array_r10 *)ret, (gfc_array_r10 *) array,
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167 h, pwhich);
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168 return;
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169 #endif
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170
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171 #if defined (HAVE_REAL_16)
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172 case GFC_DTYPE_REAL_16:
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173 cshift1_16_r16 ((gfc_array_r16 *)ret, (gfc_array_r16 *) array,
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174 h, pwhich);
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175 return;
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176 #endif
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177
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178 case GFC_DTYPE_COMPLEX_4:
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179 cshift1_16_c4 ((gfc_array_c4 *)ret, (gfc_array_c4 *) array,
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180 h, pwhich);
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181 return;
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182
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183 case GFC_DTYPE_COMPLEX_8:
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184 cshift1_16_c8 ((gfc_array_c8 *)ret, (gfc_array_c8 *) array,
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185 h, pwhich);
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186 return;
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187
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188 #if defined (HAVE_COMPLEX_10)
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189 case GFC_DTYPE_COMPLEX_10:
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190 cshift1_16_c10 ((gfc_array_c10 *)ret, (gfc_array_c10 *) array,
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191 h, pwhich);
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192 return;
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193 #endif
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194
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195 #if defined (HAVE_COMPLEX_16)
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196 case GFC_DTYPE_COMPLEX_16:
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197 cshift1_16_c16 ((gfc_array_c16 *)ret, (gfc_array_c16 *) array,
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198 h, pwhich);
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199 return;
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200 #endif
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201
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202 default:
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203 break;
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204
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205 }
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206
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207 extent[0] = 1;
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208 count[0] = 0;
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209 n = 0;
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210
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211 /* Initialized for avoiding compiler warnings. */
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212 roffset = size;
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213 soffset = size;
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214 len = 0;
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215
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216 for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
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217 {
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218 if (dim == which)
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219 {
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220 roffset = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
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221 if (roffset == 0)
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222 roffset = size;
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223 soffset = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
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224 if (soffset == 0)
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225 soffset = size;
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226 len = GFC_DESCRIPTOR_EXTENT(array,dim);
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227 }
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228 else
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229 {
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230 count[n] = 0;
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231 extent[n] = GFC_DESCRIPTOR_EXTENT(array,dim);
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232 rstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
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233 sstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
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234
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235 hstride[n] = GFC_DESCRIPTOR_STRIDE(h,n);
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236 n++;
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237 }
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238 }
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239 if (sstride[0] == 0)
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240 sstride[0] = size;
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241 if (rstride[0] == 0)
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242 rstride[0] = size;
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243 if (hstride[0] == 0)
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244 hstride[0] = 1;
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245
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246 dim = GFC_DESCRIPTOR_RANK (array);
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247 rstride0 = rstride[0];
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248 sstride0 = sstride[0];
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249 hstride0 = hstride[0];
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250 rptr = ret->base_addr;
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251 sptr = array->base_addr;
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252 hptr = h->base_addr;
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253
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254 while (rptr)
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255 {
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256 /* Do the shift for this dimension. */
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257 sh = *hptr;
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258 /* Normal case should be -len < sh < len; try to
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259 avoid the expensive remainder operation if possible. */
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260 if (sh < 0)
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261 sh += len;
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262 if (unlikely (sh >= len || sh < 0))
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263 {
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264 sh = sh % len;
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265 if (sh < 0)
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266 sh += len;
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267 }
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268
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269 src = &sptr[sh * soffset];
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270 dest = rptr;
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271 if (soffset == size && roffset == size)
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272 {
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273 size_t len1 = sh * size;
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274 size_t len2 = (len - sh) * size;
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275 memcpy (rptr, sptr + len1, len2);
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276 memcpy (rptr + len2, sptr, len1);
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277 }
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278 else
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279 {
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280 for (n = 0; n < len - sh; n++)
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281 {
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282 memcpy (dest, src, size);
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283 dest += roffset;
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284 src += soffset;
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285 }
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286 for (src = sptr, n = 0; n < sh; n++)
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287 {
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288 memcpy (dest, src, size);
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289 dest += roffset;
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290 src += soffset;
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291 }
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292 }
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293
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294 /* Advance to the next section. */
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295 rptr += rstride0;
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296 sptr += sstride0;
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297 hptr += hstride0;
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298 count[0]++;
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299 n = 0;
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300 while (count[n] == extent[n])
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301 {
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302 /* When we get to the end of a dimension, reset it and increment
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303 the next dimension. */
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304 count[n] = 0;
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305 /* We could precalculate these products, but this is a less
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306 frequently used path so probably not worth it. */
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307 rptr -= rstride[n] * extent[n];
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308 sptr -= sstride[n] * extent[n];
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309 hptr -= hstride[n] * extent[n];
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310 n++;
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311 if (n >= dim - 1)
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312 {
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313 /* Break out of the loop. */
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314 rptr = NULL;
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315 break;
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316 }
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317 else
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318 {
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319 count[n]++;
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320 rptr += rstride[n];
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321 sptr += sstride[n];
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322 hptr += hstride[n];
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323 }
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324 }
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325 }
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326 }
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327
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328 void cshift1_16 (gfc_array_char * const restrict,
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329 const gfc_array_char * const restrict,
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330 const gfc_array_i16 * const restrict,
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331 const GFC_INTEGER_16 * const restrict);
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332 export_proto(cshift1_16);
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333
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334 void
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335 cshift1_16 (gfc_array_char * const restrict ret,
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336 const gfc_array_char * const restrict array,
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337 const gfc_array_i16 * const restrict h,
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338 const GFC_INTEGER_16 * const restrict pwhich)
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339 {
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340 cshift1 (ret, array, h, pwhich);
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341 }
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342
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343
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344 void cshift1_16_char (gfc_array_char * const restrict ret,
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345 GFC_INTEGER_4,
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346 const gfc_array_char * const restrict array,
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347 const gfc_array_i16 * const restrict h,
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348 const GFC_INTEGER_16 * const restrict pwhich,
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349 GFC_INTEGER_4);
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350 export_proto(cshift1_16_char);
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351
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352 void
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353 cshift1_16_char (gfc_array_char * const restrict ret,
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354 GFC_INTEGER_4 ret_length __attribute__((unused)),
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355 const gfc_array_char * const restrict array,
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356 const gfc_array_i16 * const restrict h,
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357 const GFC_INTEGER_16 * const restrict pwhich,
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358 GFC_INTEGER_4 array_length __attribute__((unused)))
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359 {
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360 cshift1 (ret, array, h, pwhich);
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361 }
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362
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363
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364 void cshift1_16_char4 (gfc_array_char * const restrict ret,
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365 GFC_INTEGER_4,
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366 const gfc_array_char * const restrict array,
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367 const gfc_array_i16 * const restrict h,
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368 const GFC_INTEGER_16 * const restrict pwhich,
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369 GFC_INTEGER_4);
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370 export_proto(cshift1_16_char4);
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371
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372 void
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373 cshift1_16_char4 (gfc_array_char * const restrict ret,
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374 GFC_INTEGER_4 ret_length __attribute__((unused)),
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375 const gfc_array_char * const restrict array,
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376 const gfc_array_i16 * const restrict h,
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377 const GFC_INTEGER_16 * const restrict pwhich,
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378 GFC_INTEGER_4 array_length __attribute__((unused)))
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379 {
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380 cshift1 (ret, array, h, pwhich);
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381 }
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382
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383 #endif
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