libgfortran/generated/sum_r8.c

   1 /* Implementation of the SUM intrinsic
   2    Copyright 2002 Free Software Foundation, Inc.
   3    Contributed by Paul Brook <paul@nowt.org>
   4
   5 This file is part of the GNU Fortran 95 runtime library (libgfortran).
   6
   7 Libgfortran is free software; you can redistribute it and/or
   8 modify it under the terms of the GNU General Public
   9 License as published by the Free Software Foundation; either
  10 version 2 of the License, or (at your option) any later version.
  11
  12 In addition to the permissions in the GNU General Public License, the
  13 Free Software Foundation gives you unlimited permission to link the
  14 compiled version of this file into combinations with other programs,
  15 and to distribute those combinations without any restriction coming
  16 from the use of this file.  (The General Public License restrictions
  17 do apply in other respects; for example, they cover modification of
  18 the file, and distribution when not linked into a combine
  19 executable.)
  20
  21 Libgfortran is distributed in the hope that it will be useful,
  22 but WITHOUT ANY WARRANTY; without even the implied warranty of
  23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24 GNU General Public License for more details.
  25
  26 You should have received a copy of the GNU General Public
  27 License along with libgfortran; see the file COPYING.  If not,
  28 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  29 Boston, MA 02111-1307, USA.  */
  30
  31 #include "config.h"
  32 #include <stdlib.h>
  33 #include <assert.h>
  34 #include "libgfortran.h"
  35
  36
  37 extern void sum_r8 (gfc_array_r8 *, gfc_array_r8 *, index_type *);
  38 export_proto(sum_r8);
  39
  40 void
  41 sum_r8 (gfc_array_r8 *retarray, gfc_array_r8 *array, index_type *pdim)
  42 {
  43   index_type count[GFC_MAX_DIMENSIONS];
  44   index_type extent[GFC_MAX_DIMENSIONS];
  45   index_type sstride[GFC_MAX_DIMENSIONS];
  46   index_type dstride[GFC_MAX_DIMENSIONS];
  47   GFC_REAL_8 *base;
  48   GFC_REAL_8 *dest;
  49   index_type rank;
  50   index_type n;
  51   index_type len;
  52   index_type delta;
  53   index_type dim;
  54
  55   /* Make dim zero based to avoid confusion.  */
  56   dim = (*pdim) - 1;
  57   rank = GFC_DESCRIPTOR_RANK (array) - 1;
  58
  59   /* TODO:  It should be a front end job to correctly set the strides.  */
  60
  61   if (array->dim[0].stride == 0)
  62     array->dim[0].stride = 1;
  63
  64   len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
  65   delta = array->dim[dim].stride;
  66
  67   for (n = 0; n < dim; n++)
  68     {
  69       sstride[n] = array->dim[n].stride;
  70       extent[n] = array->dim[n].ubound + 1 - array->dim[n].lbound;
  71     }
  72   for (n = dim; n < rank; n++)
  73     {
  74       sstride[n] = array->dim[n + 1].stride;
  75       extent[n] =
  76         array->dim[n + 1].ubound + 1 - array->dim[n + 1].lbound;
  77     }
  78
  79   if (retarray->data == NULL)
  80     {
  81       for (n = 0; n < rank; n++)
  82         {
  83           retarray->dim[n].lbound = 0;
  84           retarray->dim[n].ubound = extent[n]-1;
  85           if (n == 0)
  86             retarray->dim[n].stride = 1;
  87           else
  88             retarray->dim[n].stride = retarray->dim[n-1].stride * extent[n-1];
  89         }
  90
  91       retarray->data
  92          = internal_malloc_size (sizeof (GFC_REAL_8)
  93                                  * retarray->dim[rank-1].stride
  94                                  * extent[rank-1]);
  95       retarray->offset = 0;
  96       retarray->dtype = (array->dtype & ~GFC_DTYPE_RANK_MASK) | rank;
  97     }
  98   else
  99     {
 100       if (retarray->dim[0].stride == 0)
 101         retarray->dim[0].stride = 1;
 102
 103       if (rank != GFC_DESCRIPTOR_RANK (retarray))
 104         runtime_error ("rank of return array incorrect");
 105     }
 106
 107   for (n = 0; n < rank; n++)
 108     {
 109       count[n] = 0;
 110       dstride[n] = retarray->dim[n].stride;
 111       if (extent[n] <= 0)
 112         len = 0;
 113     }
 114
 115   base = array->data;
 116   dest = retarray->data;
 117
 118   while (base)
 119     {
 120       GFC_REAL_8 *src;
 121       GFC_REAL_8 result;
 122       src = base;
 123       {
 124
 125   result = 0;
 126         if (len <= 0)
 127           *dest = 0;
 128         else
 129           {
 130             for (n = 0; n < len; n++, src += delta)
 131               {
 132
 133   result += *src;
 134           }
 135             *dest = result;
 136           }
 137       }
 138       /* Advance to the next element.  */
 139       count[0]++;
 140       base += sstride[0];
 141       dest += dstride[0];
 142       n = 0;
 143       while (count[n] == extent[n])
 144         {
 145           /* When we get to the end of a dimension, reset it and increment
 146              the next dimension.  */
 147           count[n] = 0;
 148           /* We could precalculate these products, but this is a less
 149              frequently used path so proabably not worth it.  */
 150           base -= sstride[n] * extent[n];
 151           dest -= dstride[n] * extent[n];
 152           n++;
 153           if (n == rank)
 154             {
 155               /* Break out of the look.  */
 156               base = NULL;
 157               break;
 158             }
 159           else
 160             {
 161               count[n]++;
 162               base += sstride[n];
 163               dest += dstride[n];
 164             }
 165         }
 166     }
 167 }
 168
 169
 170 extern void msum_r8 (gfc_array_r8 *, gfc_array_r8 *, index_type *,
 171                                                gfc_array_l4 *);
 172 export_proto(msum_r8);
 173
 174 void
 175 msum_r8 (gfc_array_r8 * retarray, gfc_array_r8 * array,
 176                                   index_type *pdim, gfc_array_l4 * mask)
 177 {
 178   index_type count[GFC_MAX_DIMENSIONS];
 179   index_type extent[GFC_MAX_DIMENSIONS];
 180   index_type sstride[GFC_MAX_DIMENSIONS];
 181   index_type dstride[GFC_MAX_DIMENSIONS];
 182   index_type mstride[GFC_MAX_DIMENSIONS];
 183   GFC_REAL_8 *dest;
 184   GFC_REAL_8 *base;
 185   GFC_LOGICAL_4 *mbase;
 186   int rank;
 187   int dim;
 188   index_type n;
 189   index_type len;
 190   index_type delta;
 191   index_type mdelta;
 192
 193   dim = (*pdim) - 1;
 194   rank = GFC_DESCRIPTOR_RANK (array) - 1;
 195
 196   /* TODO:  It should be a front end job to correctly set the strides.  */
 197
 198   if (array->dim[0].stride == 0)
 199     array->dim[0].stride = 1;
 200
 201   if (mask->dim[0].stride == 0)
 202     mask->dim[0].stride = 1;
 203
 204   len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
 205   if (len <= 0)
 206     return;
 207   delta = array->dim[dim].stride;
 208   mdelta = mask->dim[dim].stride;
 209
 210   for (n = 0; n < dim; n++)
 211     {
 212       sstride[n] = array->dim[n].stride;
 213       mstride[n] = mask->dim[n].stride;
 214       extent[n] = array->dim[n].ubound + 1 - array->dim[n].lbound;
 215     }
 216   for (n = dim; n < rank; n++)
 217     {
 218       sstride[n] = array->dim[n + 1].stride;
 219       mstride[n] = mask->dim[n + 1].stride;
 220       extent[n] =
 221         array->dim[n + 1].ubound + 1 - array->dim[n + 1].lbound;
 222     }
 223
 224   if (retarray->data == NULL)
 225     {
 226       for (n = 0; n < rank; n++)
 227         {
 228           retarray->dim[n].lbound = 0;
 229           retarray->dim[n].ubound = extent[n]-1;
 230           if (n == 0)
 231             retarray->dim[n].stride = 1;
 232           else
 233             retarray->dim[n].stride = retarray->dim[n-1].stride * extent[n-1];
 234         }
 235
 236       retarray->data
 237          = internal_malloc_size (sizeof (GFC_REAL_8)
 238                                  * retarray->dim[rank-1].stride
 239                                  * extent[rank-1]);
 240       retarray->offset = 0;
 241       retarray->dtype = (array->dtype & ~GFC_DTYPE_RANK_MASK) | rank;
 242     }
 243   else
 244     {
 245       if (retarray->dim[0].stride == 0)
 246         retarray->dim[0].stride = 1;
 247
 248       if (rank != GFC_DESCRIPTOR_RANK (retarray))
 249         runtime_error ("rank of return array incorrect");
 250     }
 251
 252   for (n = 0; n < rank; n++)
 253     {
 254       count[n] = 0;
 255       dstride[n] = retarray->dim[n].stride;
 256       if (extent[n] <= 0)
 257         return;
 258     }
 259
 260   dest = retarray->data;
 261   base = array->data;
 262   mbase = mask->data;
 263
 264   if (GFC_DESCRIPTOR_SIZE (mask) != 4)
 265     {
 266       /* This allows the same loop to be used for all logical types.  */
 267       assert (GFC_DESCRIPTOR_SIZE (mask) == 8);
 268       for (n = 0; n < rank; n++)
 269         mstride[n] <<= 1;
 270       mdelta <<= 1;
 271       mbase = (GFOR_POINTER_L8_TO_L4 (mbase));
 272     }
 273
 274   while (base)
 275     {
 276       GFC_REAL_8 *src;
 277       GFC_LOGICAL_4 *msrc;
 278       GFC_REAL_8 result;
 279       src = base;
 280       msrc = mbase;
 281       {
 282
 283   result = 0;
 284         if (len <= 0)
 285           *dest = 0;
 286         else
 287           {
 288             for (n = 0; n < len; n++, src += delta, msrc += mdelta)
 289               {
 290
 291   if (*msrc)
 292     result += *src;
 293               }
 294             *dest = result;
 295           }
 296       }
 297       /* Advance to the next element.  */
 298       count[0]++;
 299       base += sstride[0];
 300       mbase += mstride[0];
 301       dest += dstride[0];
 302       n = 0;
 303       while (count[n] == extent[n])
 304         {
 305           /* When we get to the end of a dimension, reset it and increment
 306              the next dimension.  */
 307           count[n] = 0;
 308           /* We could precalculate these products, but this is a less
 309              frequently used path so proabably not worth it.  */
 310           base -= sstride[n] * extent[n];
 311           mbase -= mstride[n] * extent[n];
 312           dest -= dstride[n] * extent[n];
 313           n++;
 314           if (n == rank)
 315             {
 316               /* Break out of the look.  */
 317               base = NULL;
 318               break;
 319             }
 320           else
 321             {
 322               count[n]++;
 323               base += sstride[n];
 324               mbase += mstride[n];
 325               dest += dstride[n];
 326             }
 327         }
 328     }
 329 }