libgfortran/generated/count_16_l.c

   1 /* Implementation of the COUNT 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_INTEGER_16)
  37
  38
  39 extern void count_16_l (gfc_array_i16 * const restrict,
  40         gfc_array_l1 * const restrict, const index_type * const restrict);
  41 export_proto(count_16_l);
  42
  43 void
  44 count_16_l (gfc_array_i16 * 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_INTEGER_16 * 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_INTEGER_16) * 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                        " COUNT intrinsic: is %ld, should be %ld",
 123                        (long int) GFC_DESCRIPTOR_RANK (retarray),
 124                        (long int) rank);
 125
 126       if (compile_options.bounds_check)
 127         {
 128           for (n=0; n < rank; n++)
 129             {
 130               index_type ret_extent;
 131
 132               ret_extent = retarray->dim[n].ubound + 1
 133                 - retarray->dim[n].lbound;
 134               if (extent[n] != ret_extent)
 135                 runtime_error ("Incorrect extent in return value of"
 136                                " COUNT intrinsic in dimension %d:"
 137                                " is %ld, should be %ld", n + 1,
 138                                (long int) ret_extent, (long int) extent[n]);
 139             }
 140         }
 141     }
 142
 143   for (n = 0; n < rank; n++)
 144     {
 145       count[n] = 0;
 146       dstride[n] = retarray->dim[n].stride;
 147       if (extent[n] <= 0)
 148         len = 0;
 149     }
 150
 151   base = array->data;
 152
 153   if (src_kind == 1 || src_kind == 2 || src_kind == 4 || src_kind == 8
 154 #ifdef HAVE_GFC_LOGICAL_16
 155       || src_kind == 16
 156 #endif
 157     )
 158     {
 159       if (base)
 160         base = GFOR_POINTER_TO_L1 (base, src_kind);
 161     }
 162   else
 163     internal_error (NULL, "Funny sized logical array in COUNT intrinsic");
 164
 165   dest = retarray->data;
 166
 167   while (base)
 168     {
 169       const GFC_LOGICAL_1 * restrict src;
 170       GFC_INTEGER_16 result;
 171       src = base;
 172       {
 173
 174   result = 0;
 175         if (len <= 0)
 176           *dest = 0;
 177         else
 178           {
 179             for (n = 0; n < len; n++, src += delta)
 180               {
 181
 182   if (*src)
 183     result++;
 184           }
 185             *dest = result;
 186           }
 187       }
 188       /* Advance to the next element.  */
 189       count[0]++;
 190       base += sstride[0];
 191       dest += dstride[0];
 192       n = 0;
 193       while (count[n] == extent[n])
 194         {
 195           /* When we get to the end of a dimension, reset it and increment
 196              the next dimension.  */
 197           count[n] = 0;
 198           /* We could precalculate these products, but this is a less
 199              frequently used path so probably not worth it.  */
 200           base -= sstride[n] * extent[n];
 201           dest -= dstride[n] * extent[n];
 202           n++;
 203           if (n == rank)
 204             {
 205               /* Break out of the look.  */
 206               base = NULL;
 207               break;
 208             }
 209           else
 210             {
 211               count[n]++;
 212               base += sstride[n];
 213               dest += dstride[n];
 214             }
 215         }
 216     }
 217 }
 218
 219 #endif