libgfortran/generated/count_4_l.c

   1 /* Implementation of the COUNT intrinsic
   2    Copyright (C) 2002-2018 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_4)
  30
  31
  32 extern void count_4_l (gfc_array_i4 * const restrict,
  33         gfc_array_l1 * const restrict, const index_type * const restrict);
  34 export_proto(count_4_l);
  35
  36 void
  37 count_4_l (gfc_array_i4 * 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_4 * 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       if (alloc_size == 0)
 105         {
 106           /* Make sure we have a zero-sized array.  */
 107           GFC_DIMENSION_SET(retarray->dim[0], 0, -1, 1);
 108           return;
 109         }
 110       else
 111         retarray->base_addr = xmallocarray (alloc_size, sizeof (GFC_INTEGER_4));
 112     }
 113   else
 114     {
 115       if (rank != GFC_DESCRIPTOR_RANK (retarray))
 116         runtime_error ("rank of return array incorrect in"
 117                        " COUNT intrinsic: is %ld, should be %ld",
 118                        (long int) GFC_DESCRIPTOR_RANK (retarray),
 119                        (long int) rank);
 120
 121       if (unlikely (compile_options.bounds_check))
 122         {
 123           for (n=0; n < rank; n++)
 124             {
 125               index_type ret_extent;
 126
 127               ret_extent = GFC_DESCRIPTOR_EXTENT(retarray,n);
 128               if (extent[n] != ret_extent)
 129                 runtime_error ("Incorrect extent in return value of"
 130                                " COUNT intrinsic in dimension %d:"
 131                                " is %ld, should be %ld", (int) n + 1,
 132                                (long int) ret_extent, (long int) extent[n]);
 133             }
 134         }
 135     }
 136
 137   for (n = 0; n < rank; n++)
 138     {
 139       count[n] = 0;
 140       dstride[n] = GFC_DESCRIPTOR_STRIDE(retarray,n);
 141       if (extent[n] <= 0)
 142         return;
 143     }
 144
 145   base = array->base_addr;
 146
 147   if (src_kind == 1 || src_kind == 2 || src_kind == 4 || src_kind == 8
 148 #ifdef HAVE_GFC_LOGICAL_16
 149       || src_kind == 16
 150 #endif
 151     )
 152     {
 153       if (base)
 154         base = GFOR_POINTER_TO_L1 (base, src_kind);
 155     }
 156   else
 157     internal_error (NULL, "Funny sized logical array in COUNT intrinsic");
 158
 159   dest = retarray->base_addr;
 160
 161   continue_loop = 1;
 162   while (continue_loop)
 163     {
 164       const GFC_LOGICAL_1 * restrict src;
 165       GFC_INTEGER_4 result;
 166       src = base;
 167       {
 168
 169   result = 0;
 170         if (len <= 0)
 171           *dest = 0;
 172         else
 173           {
 174             for (n = 0; n < len; n++, src += delta)
 175               {
 176
 177   if (*src)
 178     result++;
 179           }
 180             *dest = result;
 181           }
 182       }
 183       /* Advance to the next element.  */
 184       count[0]++;
 185       base += sstride[0];
 186       dest += dstride[0];
 187       n = 0;
 188       while (count[n] == extent[n])
 189         {
 190           /* When we get to the end of a dimension, reset it and increment
 191              the next dimension.  */
 192           count[n] = 0;
 193           /* We could precalculate these products, but this is a less
 194              frequently used path so probably not worth it.  */
 195           base -= sstride[n] * extent[n];
 196           dest -= dstride[n] * extent[n];
 197           n++;
 198           if (n >= rank)
 199             {
 200               /* Break out of the loop.  */
 201               continue_loop = 0;
 202               break;
 203             }
 204           else
 205             {
 206               count[n]++;
 207               base += sstride[n];
 208               dest += dstride[n];
 209             }
 210         }
 211     }
 212 }
 213
 214 #endif