libgfortran/generated/count_1_l.c

   1 /* Implementation of the COUNT intrinsic
   2    Copyright (C) 2002-2024 Free Software Foundation, Inc.
   3    Contributed by Paul Brook <paul@nowt.org>
   4
   5 This file is part of the GNU Fortran 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
  28
  29 #if defined (HAVE_GFC_INTEGER_1)
  30
  31
  32 extern void count_1_l (gfc_array_i1 * const restrict,
  33         gfc_array_l1 * const restrict, const index_type * const restrict);
  34 export_proto(count_1_l);
  35
  36 void
  37 count_1_l (gfc_array_i1 * const restrict retarray,
  38         gfc_array_l1 * const restrict array,
  39         const index_type * const restrict pdim)
  40 {
  41   index_type count[GFC_MAX_DIMENSIONS];
  42   index_type extent[GFC_MAX_DIMENSIONS];
  43   index_type sstride[GFC_MAX_DIMENSIONS];
  44   index_type dstride[GFC_MAX_DIMENSIONS];
  45   const GFC_LOGICAL_1 * restrict base;
  46   GFC_INTEGER_1 * restrict dest;
  47   index_type rank;
  48   index_type n;
  49   index_type len;
  50   index_type delta;
  51   index_type dim;
  52   int src_kind;
  53   int continue_loop;
  54
  55   /* Make dim zero based to avoid confusion.  */
  56   dim = (*pdim) - 1;
  57   rank = GFC_DESCRIPTOR_RANK (array) - 1;
  58
  59   src_kind = GFC_DESCRIPTOR_SIZE (array);
  60
  61   len = GFC_DESCRIPTOR_EXTENT(array,dim);
  62   if (len < 0)
  63     len = 0;
  64
  65   delta = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
  66
  67   for (n = 0; n < dim; n++)
  68     {
  69       sstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(array,n);
  70       extent[n] = GFC_DESCRIPTOR_EXTENT(array,n);
  71
  72       if (extent[n] < 0)
  73         extent[n] = 0;
  74     }
  75   for (n = dim; n < rank; n++)
  76     {
  77       sstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(array,n + 1);
  78       extent[n] = GFC_DESCRIPTOR_EXTENT(array,n + 1);
  79
  80       if (extent[n] < 0)
  81         extent[n] = 0;
  82     }
  83
  84   if (retarray->base_addr == NULL)
  85     {
  86       size_t alloc_size, str;
  87
  88       for (n = 0; n < rank; n++)
  89         {
  90           if (n == 0)
  91             str = 1;
  92           else
  93             str = GFC_DESCRIPTOR_STRIDE(retarray,n-1) * extent[n-1];
  94
  95           GFC_DIMENSION_SET(retarray->dim[n], 0, extent[n] - 1, str);
  96
  97         }
  98
  99       retarray->offset = 0;
 100       retarray->dtype.rank = rank;
 101
 102       alloc_size = GFC_DESCRIPTOR_STRIDE(retarray,rank-1) * extent[rank-1];
 103
 104       retarray->base_addr = xmallocarray (alloc_size, sizeof (GFC_INTEGER_1));
 105       if (alloc_size == 0)
 106         return;
 107     }
 108   else
 109     {
 110       if (rank != GFC_DESCRIPTOR_RANK (retarray))
 111         runtime_error ("rank of return array incorrect in"
 112                        " COUNT intrinsic: is %ld, should be %ld",
 113                        (long int) GFC_DESCRIPTOR_RANK (retarray),
 114                        (long int) rank);
 115
 116       if (unlikely (compile_options.bounds_check))
 117         {
 118           for (n=0; n < rank; n++)
 119             {
 120               index_type ret_extent;
 121
 122               ret_extent = GFC_DESCRIPTOR_EXTENT(retarray,n);
 123               if (extent[n] != ret_extent)
 124                 runtime_error ("Incorrect extent in return value of"
 125                                " COUNT intrinsic in dimension %d:"
 126                                " is %ld, should be %ld", (int) n + 1,
 127                                (long int) ret_extent, (long int) extent[n]);
 128             }
 129         }
 130     }
 131
 132   for (n = 0; n < rank; n++)
 133     {
 134       count[n] = 0;
 135       dstride[n] = GFC_DESCRIPTOR_STRIDE(retarray,n);
 136       if (extent[n] <= 0)
 137         return;
 138     }
 139
 140   base = array->base_addr;
 141
 142   if (src_kind == 1 || src_kind == 2 || src_kind == 4 || src_kind == 8
 143 #ifdef HAVE_GFC_LOGICAL_16
 144       || src_kind == 16
 145 #endif
 146     )
 147     {
 148       if (base)
 149         base = GFOR_POINTER_TO_L1 (base, src_kind);
 150     }
 151   else
 152     internal_error (NULL, "Funny sized logical array in COUNT intrinsic");
 153
 154   dest = retarray->base_addr;
 155
 156   continue_loop = 1;
 157   while (continue_loop)
 158     {
 159       const GFC_LOGICAL_1 * restrict src;
 160       GFC_INTEGER_1 result;
 161       src = base;
 162       {
 163
 164   result = 0;
 165         if (len <= 0)
 166           *dest = 0;
 167         else
 168           {
 169             for (n = 0; n < len; n++, src += delta)
 170               {
 171
 172   if (*src)
 173     result++;
 174           }
 175             *dest = result;
 176           }
 177       }
 178       /* Advance to the next element.  */
 179       count[0]++;
 180       base += sstride[0];
 181       dest += dstride[0];
 182       n = 0;
 183       while (count[n] == extent[n])
 184         {
 185           /* When we get to the end of a dimension, reset it and increment
 186              the next dimension.  */
 187           count[n] = 0;
 188           /* We could precalculate these products, but this is a less
 189              frequently used path so probably not worth it.  */
 190           base -= sstride[n] * extent[n];
 191           dest -= dstride[n] * extent[n];
 192           n++;
 193           if (n >= rank)
 194             {
 195               /* Break out of the loop.  */
 196               continue_loop = 0;
 197               break;
 198             }
 199           else
 200             {
 201               count[n]++;
 202               base += sstride[n];
 203               dest += dstride[n];
 204             }
 205         }
 206     }
 207 }
 208
 209 #endif