libgfortran/generated/all_l2.c

   1 /* Implementation of the ALL intrinsic
   2    Copyright 2002, 2007, 2009 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 3 of the License, or (at your option) any later version.
  11
  12 Libgfortran is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 #include "libgfortran.h"
  27 #include <stdlib.h>
  28 #include <assert.h>
  29
  30
  31 #if defined (HAVE_GFC_LOGICAL_2)
  32
  33
  34 extern void all_l2 (gfc_array_l2 * const restrict,
  35         gfc_array_l1 * const restrict, const index_type * const restrict);
  36 export_proto(all_l2);
  37
  38 void
  39 all_l2 (gfc_array_l2 * const restrict retarray,
  40         gfc_array_l1 * const restrict array,
  41         const index_type * const restrict 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   const GFC_LOGICAL_1 * restrict base;
  48   GFC_LOGICAL_2 * restrict dest;
  49   index_type rank;
  50   index_type n;
  51   index_type len;
  52   index_type delta;
  53   index_type dim;
  54   int src_kind;
  55   int continue_loop;
  56
  57   /* Make dim zero based to avoid confusion.  */
  58   dim = (*pdim) - 1;
  59   rank = GFC_DESCRIPTOR_RANK (array) - 1;
  60
  61   src_kind = GFC_DESCRIPTOR_SIZE (array);
  62
  63   len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
  64   if (len < 0)
  65     len = 0;
  66
  67   delta = array->dim[dim].stride * src_kind;
  68
  69   for (n = 0; n < dim; n++)
  70     {
  71       sstride[n] = array->dim[n].stride * src_kind;
  72       extent[n] = array->dim[n].ubound + 1 - array->dim[n].lbound;
  73
  74       if (extent[n] < 0)
  75         extent[n] = 0;
  76     }
  77   for (n = dim; n < rank; n++)
  78     {
  79       sstride[n] = array->dim[n + 1].stride * src_kind;
  80       extent[n] =
  81         array->dim[n + 1].ubound + 1 - array->dim[n + 1].lbound;
  82
  83       if (extent[n] < 0)
  84         extent[n] = 0;
  85     }
  86
  87   if (retarray->data == NULL)
  88     {
  89       size_t alloc_size;
  90
  91       for (n = 0; n < rank; n++)
  92         {
  93           retarray->dim[n].lbound = 0;
  94           retarray->dim[n].ubound = extent[n]-1;
  95           if (n == 0)
  96             retarray->dim[n].stride = 1;
  97           else
  98             retarray->dim[n].stride = retarray->dim[n-1].stride * extent[n-1];
  99         }
 100
 101       retarray->offset = 0;
 102       retarray->dtype = (array->dtype & ~GFC_DTYPE_RANK_MASK) | rank;
 103
 104       alloc_size = sizeof (GFC_LOGICAL_2) * retarray->dim[rank-1].stride
 105                    * extent[rank-1];
 106
 107       if (alloc_size == 0)
 108         {
 109           /* Make sure we have a zero-sized array.  */
 110           retarray->dim[0].lbound = 0;
 111           retarray->dim[0].ubound = -1;
 112           return;
 113         }
 114       else
 115         retarray->data = internal_malloc_size (alloc_size);
 116     }
 117   else
 118     {
 119       if (rank != GFC_DESCRIPTOR_RANK (retarray))
 120         runtime_error ("rank of return array incorrect in"
 121                        " ALL intrinsic: is %ld, should be %ld",
 122                        (long int) GFC_DESCRIPTOR_RANK (retarray),
 123                        (long int) rank);
 124
 125       if (unlikely (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", (int) 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   continue_loop = 1;
 167   while (continue_loop)
 168     {
 169       const GFC_LOGICAL_1 * restrict src;
 170       GFC_LOGICAL_2 result;
 171       src = base;
 172       {
 173
 174   /* Return true only if all the elements are set.  */
 175   result = 1;
 176         if (len <= 0)
 177           *dest = 1;
 178         else
 179           {
 180             for (n = 0; n < len; n++, src += delta)
 181               {
 182
 183   if (! *src)
 184     {
 185       result = 0;
 186       break;
 187     }
 188           }
 189             *dest = result;
 190           }
 191       }
 192       /* Advance to the next element.  */
 193       count[0]++;
 194       base += sstride[0];
 195       dest += dstride[0];
 196       n = 0;
 197       while (count[n] == extent[n])
 198         {
 199           /* When we get to the end of a dimension, reset it and increment
 200              the next dimension.  */
 201           count[n] = 0;
 202           /* We could precalculate these products, but this is a less
 203              frequently used path so probably not worth it.  */
 204           base -= sstride[n] * extent[n];
 205           dest -= dstride[n] * extent[n];
 206           n++;
 207           if (n == rank)
 208             {
 209               /* Break out of the look.  */
 210               continue_loop = 0;
 211               break;
 212             }
 213           else
 214             {
 215               count[n]++;
 216               base += sstride[n];
 217               dest += dstride[n];
 218             }
 219         }
 220     }
 221 }
 222
 223 #endif