libgfortran/generated/count_4_l16.c

   1 /* Implementation of the COUNT intrinsic
   2    Copyright 2002 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 "config.h"
  32 #include <stdlib.h>
  33 #include <assert.h>
  34 #include "libgfortran.h"
  35
  36
  37 #if defined (HAVE_GFC_LOGICAL_16) && defined (HAVE_GFC_INTEGER_4)
  38
  39
  40 extern void count_4_l16 (gfc_array_i4 * const restrict,
  41         gfc_array_l16 * const restrict, const index_type * const restrict);
  42 export_proto(count_4_l16);
  43
  44 void
  45 count_4_l16 (gfc_array_i4 * const restrict retarray,
  46         gfc_array_l16 * const restrict array,
  47         const index_type * const restrict pdim)
  48 {
  49   index_type count[GFC_MAX_DIMENSIONS];
  50   index_type extent[GFC_MAX_DIMENSIONS];
  51   index_type sstride[GFC_MAX_DIMENSIONS];
  52   index_type dstride[GFC_MAX_DIMENSIONS];
  53   const GFC_LOGICAL_16 * restrict base;
  54   GFC_INTEGER_4 * restrict dest;
  55   index_type rank;
  56   index_type n;
  57   index_type len;
  58   index_type delta;
  59   index_type dim;
  60
  61   /* Make dim zero based to avoid confusion.  */
  62   dim = (*pdim) - 1;
  63   rank = GFC_DESCRIPTOR_RANK (array) - 1;
  64
  65   len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
  66   delta = array->dim[dim].stride;
  67
  68   for (n = 0; n < dim; n++)
  69     {
  70       sstride[n] = array->dim[n].stride;
  71       extent[n] = array->dim[n].ubound + 1 - array->dim[n].lbound;
  72
  73       if (extent[n] < 0)
  74         extent[n] = 0;
  75     }
  76   for (n = dim; n < rank; n++)
  77     {
  78       sstride[n] = array->dim[n + 1].stride;
  79       extent[n] =
  80         array->dim[n + 1].ubound + 1 - array->dim[n + 1].lbound;
  81
  82       if (extent[n] < 0)
  83         extent[n] = 0;
  84     }
  85
  86   if (retarray->data == NULL)
  87     {
  88       size_t alloc_size;
  89
  90       for (n = 0; n < rank; n++)
  91         {
  92           retarray->dim[n].lbound = 0;
  93           retarray->dim[n].ubound = extent[n]-1;
  94           if (n == 0)
  95             retarray->dim[n].stride = 1;
  96           else
  97             retarray->dim[n].stride = retarray->dim[n-1].stride * extent[n-1];
  98         }
  99
 100       retarray->offset = 0;
 101       retarray->dtype = (array->dtype & ~GFC_DTYPE_RANK_MASK) | rank;
 102
 103       alloc_size = sizeof (GFC_INTEGER_4) * retarray->dim[rank-1].stride
 104                    * extent[rank-1];
 105
 106       if (alloc_size == 0)
 107         {
 108           /* Make sure we have a zero-sized array.  */
 109           retarray->dim[0].lbound = 0;
 110           retarray->dim[0].ubound = -1;
 111           return;
 112         }
 113       else
 114         retarray->data = internal_malloc_size (alloc_size);
 115     }
 116   else
 117     {
 118       if (rank != GFC_DESCRIPTOR_RANK (retarray))
 119         runtime_error ("rank of return array incorrect");
 120     }
 121
 122   for (n = 0; n < rank; n++)
 123     {
 124       count[n] = 0;
 125       dstride[n] = retarray->dim[n].stride;
 126       if (extent[n] <= 0)
 127         len = 0;
 128     }
 129
 130   base = array->data;
 131   dest = retarray->data;
 132
 133   while (base)
 134     {
 135       const GFC_LOGICAL_16 * restrict src;
 136       GFC_INTEGER_4 result;
 137       src = base;
 138       {
 139
 140   result = 0;
 141         if (len <= 0)
 142           *dest = 0;
 143         else
 144           {
 145             for (n = 0; n < len; n++, src += delta)
 146               {
 147
 148   if (*src)
 149     result++;
 150           }
 151             *dest = result;
 152           }
 153       }
 154       /* Advance to the next element.  */
 155       count[0]++;
 156       base += sstride[0];
 157       dest += dstride[0];
 158       n = 0;
 159       while (count[n] == extent[n])
 160         {
 161           /* When we get to the end of a dimension, reset it and increment
 162              the next dimension.  */
 163           count[n] = 0;
 164           /* We could precalculate these products, but this is a less
 165              frequently used path so probably not worth it.  */
 166           base -= sstride[n] * extent[n];
 167           dest -= dstride[n] * extent[n];
 168           n++;
 169           if (n == rank)
 170             {
 171               /* Break out of the look.  */
 172               base = NULL;
 173               break;
 174             }
 175           else
 176             {
 177               count[n]++;
 178               base += sstride[n];
 179               dest += dstride[n];
 180             }
 181         }
 182     }
 183 }
 184
 185 #endif