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111
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1 /* Generic helper function for repacking arrays.
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2 Copyright (C) 2003-2020 Free Software Foundation, Inc.
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3 Contributed by Paul Brook <paul@nowt.org>
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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 Libgfortran 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 extern void *internal_pack (gfc_array_char *);
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30 export_proto(internal_pack);
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31
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32 void *
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33 internal_pack (gfc_array_char * source)
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34 {
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35 index_type count[GFC_MAX_DIMENSIONS];
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36 index_type extent[GFC_MAX_DIMENSIONS];
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37 index_type stride[GFC_MAX_DIMENSIONS];
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38 index_type stride0;
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39 index_type dim;
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40 index_type ssize;
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41 const char *src;
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42 char *dest;
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43 void *destptr;
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44 int packed;
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45 index_type size;
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46 index_type type_size;
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47
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48 if (source->base_addr == NULL)
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49 return NULL;
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50
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51 type_size = GFC_DTYPE_TYPE_SIZE(source);
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52 size = GFC_DESCRIPTOR_SIZE (source);
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53 switch (type_size)
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54 {
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55 case GFC_DTYPE_INTEGER_1:
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56 case GFC_DTYPE_LOGICAL_1:
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57 return internal_pack_1 ((gfc_array_i1 *) source);
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58
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59 case GFC_DTYPE_INTEGER_2:
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60 case GFC_DTYPE_LOGICAL_2:
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61 return internal_pack_2 ((gfc_array_i2 *) source);
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62
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63 case GFC_DTYPE_INTEGER_4:
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64 case GFC_DTYPE_LOGICAL_4:
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65 return internal_pack_4 ((gfc_array_i4 *) source);
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66
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67 case GFC_DTYPE_INTEGER_8:
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68 case GFC_DTYPE_LOGICAL_8:
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69 return internal_pack_8 ((gfc_array_i8 *) source);
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70
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71 #if defined(HAVE_GFC_INTEGER_16)
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72 case GFC_DTYPE_INTEGER_16:
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73 case GFC_DTYPE_LOGICAL_16:
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74 return internal_pack_16 ((gfc_array_i16 *) source);
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75 #endif
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76 case GFC_DTYPE_REAL_4:
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77 return internal_pack_r4 ((gfc_array_r4 *) source);
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78
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79 case GFC_DTYPE_REAL_8:
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80 return internal_pack_r8 ((gfc_array_r8 *) source);
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81
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82 /* FIXME: This here is a hack, which will have to be removed when
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83 the array descriptor is reworked. Currently, we don't store the
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84 kind value for the type, but only the size. Because on targets with
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85 __float128, we have sizeof(logn double) == sizeof(__float128),
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86 we cannot discriminate here and have to fall back to the generic
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87 handling (which is suboptimal). */
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88 #if !defined(GFC_REAL_16_IS_FLOAT128)
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89 # if defined (HAVE_GFC_REAL_10)
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90 case GFC_DTYPE_REAL_10:
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91 return internal_pack_r10 ((gfc_array_r10 *) source);
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92 # endif
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93
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94 # if defined (HAVE_GFC_REAL_16)
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95 case GFC_DTYPE_REAL_16:
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96 return internal_pack_r16 ((gfc_array_r16 *) source);
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97 # endif
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98 #endif
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99
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100 case GFC_DTYPE_COMPLEX_4:
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101 return internal_pack_c4 ((gfc_array_c4 *) source);
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102
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103 case GFC_DTYPE_COMPLEX_8:
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104 return internal_pack_c8 ((gfc_array_c8 *) source);
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105
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106 /* FIXME: This here is a hack, which will have to be removed when
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107 the array descriptor is reworked. Currently, we don't store the
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108 kind value for the type, but only the size. Because on targets with
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109 __float128, we have sizeof(logn double) == sizeof(__float128),
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110 we cannot discriminate here and have to fall back to the generic
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111 handling (which is suboptimal). */
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112 #if !defined(GFC_REAL_16_IS_FLOAT128)
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113 # if defined (HAVE_GFC_COMPLEX_10)
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114 case GFC_DTYPE_COMPLEX_10:
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115 return internal_pack_c10 ((gfc_array_c10 *) source);
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116 # endif
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117
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118 # if defined (HAVE_GFC_COMPLEX_16)
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119 case GFC_DTYPE_COMPLEX_16:
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120 return internal_pack_c16 ((gfc_array_c16 *) source);
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121 # endif
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122 #endif
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123
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131
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124 default:
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125 break;
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126 }
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127
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128 switch(GFC_DESCRIPTOR_SIZE (source))
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129 {
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130 case 1:
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131 return internal_pack_1 ((gfc_array_i1 *) source);
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132
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133 case 2:
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134 if (GFC_UNALIGNED_2(source->base_addr))
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135 break;
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136 else
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137 return internal_pack_2 ((gfc_array_i2 *) source);
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138
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131
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139 case 4:
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140 if (GFC_UNALIGNED_4(source->base_addr))
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141 break;
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142 else
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143 return internal_pack_4 ((gfc_array_i4 *) source);
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144
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131
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145 case 8:
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146 if (GFC_UNALIGNED_8(source->base_addr))
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147 break;
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148 else
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149 return internal_pack_8 ((gfc_array_i8 *) source);
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150
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151 #ifdef HAVE_GFC_INTEGER_16
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152 case 16:
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153 if (GFC_UNALIGNED_16(source->base_addr))
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154 break;
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155 else
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156 return internal_pack_16 ((gfc_array_i16 *) source);
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157 #endif
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158 default:
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159 break;
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160 }
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131
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161
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162 dim = GFC_DESCRIPTOR_RANK (source);
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163 ssize = 1;
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164 packed = 1;
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165 for (index_type n = 0; n < dim; n++)
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166 {
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167 count[n] = 0;
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168 stride[n] = GFC_DESCRIPTOR_STRIDE(source,n);
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169 extent[n] = GFC_DESCRIPTOR_EXTENT(source,n);
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170 if (extent[n] <= 0)
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171 {
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172 /* Do nothing. */
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173 packed = 1;
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174 break;
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175 }
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176
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177 if (ssize != stride[n])
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178 packed = 0;
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179
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180 ssize *= extent[n];
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181 }
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182
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183 if (packed)
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184 return source->base_addr;
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185
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186 /* Allocate storage for the destination. */
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187 destptr = xmallocarray (ssize, size);
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188 dest = (char *)destptr;
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189 src = source->base_addr;
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190 stride0 = stride[0] * size;
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191
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192 while (src)
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193 {
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194 /* Copy the data. */
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195 memcpy(dest, src, size);
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196 /* Advance to the next element. */
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197 dest += size;
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198 src += stride0;
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199 count[0]++;
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200 /* Advance to the next source element. */
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201 index_type n = 0;
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202 while (count[n] == extent[n])
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203 {
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204 /* When we get to the end of a dimension, reset it and increment
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205 the next dimension. */
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206 count[n] = 0;
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207 /* We could precalculate these products, but this is a less
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208 frequently used path so probably not worth it. */
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209 src -= stride[n] * extent[n] * size;
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210 n++;
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211 if (n == dim)
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212 {
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213 src = NULL;
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214 break;
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215 }
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216 else
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217 {
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218 count[n]++;
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219 src += stride[n] * size;
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220 }
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221 }
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222 }
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223 return destptr;
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224 }
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