libgfortran/generated/all_l4.c

   1 /* Implementation of the ALL intrinsic
   2    Copyright 2002, 2007 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., 51 Franklin Street, Fifth Floor,
  29 Boston, MA 02110-1301, USA.  */
  30
  31 #include "libgfortran.h"
  32 #include <stdlib.h>
  33 #include <assert.h>
  34
  35
  36 #if defined (HAVE_GFC_LOGICAL_4)
  37
  38
  39 extern void all_l4 (gfc_array_l4 * const restrict,
  40         gfc_array_l1 * const restrict, const index_type * const restrict);
  41 export_proto(all_l4);
  42
  43 void
  44 all_l4 (gfc_array_l4 * const restrict retarray,
  45         gfc_array_l1 * const restrict array,
  46         const index_type * const restrict pdim)
  47 {
  48   index_type count[GFC_MAX_DIMENSIONS];
  49   index_type extent[GFC_MAX_DIMENSIONS];
  50   index_type sstride[GFC_MAX_DIMENSIONS];
  51   index_type dstride[GFC_MAX_DIMENSIONS];
  52   const GFC_LOGICAL_1 * restrict base;
  53   GFC_LOGICAL_4 * restrict dest;
  54   index_type rank;
  55   index_type n;
  56   index_type len;
  57   index_type delta;
  58   index_type dim;
  59   int src_kind;
  60
  61   /* Make dim zero based to avoid confusion.  */
  62   dim = (*pdim) - 1;
  63   rank = GFC_DESCRIPTOR_RANK (array) - 1;
  64
  65   src_kind = GFC_DESCRIPTOR_SIZE (array);
  66
  67   len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
  68   delta = array->dim[dim].stride * src_kind;
  69
  70   for (n = 0; n < dim; n++)
  71     {
  72       sstride[n] = array->dim[n].stride * src_kind;
  73       extent[n] = array->dim[n].ubound + 1 - array->dim[n].lbound;
  74
  75       if (extent[n] < 0)
  76         extent[n] = 0;
  77     }
  78   for (n = dim; n < rank; n++)
  79     {
  80       sstride[n] = array->dim[n + 1].stride * src_kind;
  81       extent[n] =
  82         array->dim[n + 1].ubound + 1 - array->dim[n + 1].lbound;
  83
  84       if (extent[n] < 0)
  85         extent[n] = 0;
  86     }
  87
  88   if (retarray->data == NULL)
  89     {
  90       size_t alloc_size;
  91
  92       for (n = 0; n < rank; n++)
  93         {
  94           retarray->dim[n].lbound = 0;
  95           retarray->dim[n].ubound = extent[n]-1;
  96           if (n == 0)
  97             retarray->dim[n].stride = 1;
  98           else
  99             retarray->dim[n].stride = retarray->dim[n-1].stride * extent[n-1];
 100         }
 101
 102       retarray->offset = 0;
 103       retarray->dtype = (array->dtype & ~GFC_DTYPE_RANK_MASK) | rank;
 104
 105       alloc_size = sizeof (GFC_LOGICAL_4) * retarray->dim[rank-1].stride
 106                    * extent[rank-1];
 107
 108       if (alloc_size == 0)
 109         {
 110           /* Make sure we have a zero-sized array.  */
 111           retarray->dim[0].lbound = 0;
 112           retarray->dim[0].ubound = -1;
 113           return;
 114         }
 115       else
 116         retarray->data = internal_malloc_size (alloc_size);
 117     }
 118   else
 119     {
 120       if (rank != GFC_DESCRIPTOR_RANK (retarray))
 121         runtime_error ("rank of return array incorrect in"
 122                        " ALL intrinsic: is %d, should be %d",
 123                        GFC_DESCRIPTOR_RANK (retarray), rank);
 124
 125       if (compile_options.bounds_check)
 126         {
 127           for (n=0; n < rank; n++)
 128             {
 129               index_type ret_extent;
 130
 131               ret_extent = retarray->dim[n].ubound + 1
 132                 - retarray->dim[n].lbound;
 133               if (extent[n] != ret_extent)
 134                 runtime_error ("Incorrect extent in return value of"
 135                                " ALL intrinsic in dimension %d:"
 136                                " is %ld, should be %ld", n + 1,
 137                                (long int) ret_extent, (long int) extent[n]);
 138             }
 139         }
 140     }
 141
 142   for (n = 0; n < rank; n++)
 143     {
 144       count[n] = 0;
 145       dstride[n] = retarray->dim[n].stride;
 146       if (extent[n] <= 0)
 147         len = 0;
 148     }
 149
 150   base = array->data;
 151
 152   if (src_kind == 1 || src_kind == 2 || src_kind == 4 || src_kind == 8
 153 #ifdef HAVE_GFC_LOGICAL_16
 154       || src_kind == 16
 155 #endif
 156     )
 157     {
 158       if (base)
 159         base = GFOR_POINTER_TO_L1 (base, src_kind);
 160     }
 161   else
 162     internal_error (NULL, "Funny sized logical array in ALL intrinsic");
 163
 164   dest = retarray->data;
 165
 166   while (base)
 167     {
 168       const GFC_LOGICAL_1 * restrict src;
 169       GFC_LOGICAL_4 result;
 170       src = base;
 171       {
 172
 173   /* Return true only if all the elements are set.  */
 174   result = 1;
 175         if (len <= 0)
 176           *dest = 1;
 177         else
 178           {
 179             for (n = 0; n < len; n++, src += delta)
 180               {
 181
 182   if (! *src)
 183     {
 184       result = 0;
 185       break;
 186     }
 187           }
 188             *dest = result;
 189           }
 190       }
 191       /* Advance to the next element.  */
 192       count[0]++;
 193       base += sstride[0];
 194       dest += dstride[0];
 195       n = 0;
 196       while (count[n] == extent[n])
 197         {
 198           /* When we get to the end of a dimension, reset it and increment
 199              the next dimension.  */
 200           count[n] = 0;
 201           /* We could precalculate these products, but this is a less
 202              frequently used path so probably not worth it.  */
 203           base -= sstride[n] * extent[n];
 204           dest -= dstride[n] * extent[n];
 205           n++;
 206           if (n == rank)
 207             {
 208               /* Break out of the look.  */
 209               base = NULL;
 210               break;
 211             }
 212           else
 213             {
 214               count[n]++;
 215               base += sstride[n];
 216               dest += dstride[n];
 217             }
 218         }
 219     }
 220 }
 221
 222 #endif