libgfortran/generated/minloc0_4_r4.c

   1 /* Implementation of the MINLOC 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 <float.h>
  35 #include <limits.h>
  36 #include "libgfortran.h"
  37
  38
  39 #if defined (HAVE_GFC_REAL_4) && defined (HAVE_GFC_INTEGER_4)
  40
  41
  42 extern void minloc0_4_r4 (gfc_array_i4 * const restrict retarray,
  43         gfc_array_r4 * const restrict array);
  44 export_proto(minloc0_4_r4);
  45
  46 void
  47 minloc0_4_r4 (gfc_array_i4 * const restrict retarray,
  48         gfc_array_r4 * const restrict array)
  49 {
  50   index_type count[GFC_MAX_DIMENSIONS];
  51   index_type extent[GFC_MAX_DIMENSIONS];
  52   index_type sstride[GFC_MAX_DIMENSIONS];
  53   index_type dstride;
  54   const GFC_REAL_4 *base;
  55   GFC_INTEGER_4 *dest;
  56   index_type rank;
  57   index_type n;
  58
  59   rank = GFC_DESCRIPTOR_RANK (array);
  60   if (rank <= 0)
  61     runtime_error ("Rank of array needs to be > 0");
  62
  63   if (retarray->data == NULL)
  64     {
  65       retarray->dim[0].lbound = 0;
  66       retarray->dim[0].ubound = rank-1;
  67       retarray->dim[0].stride = 1;
  68       retarray->dtype = (retarray->dtype & ~GFC_DTYPE_RANK_MASK) | 1;
  69       retarray->offset = 0;
  70       retarray->data = internal_malloc_size (sizeof (GFC_INTEGER_4) * rank);
  71     }
  72   else
  73     {
  74       if (GFC_DESCRIPTOR_RANK (retarray) != 1)
  75         runtime_error ("rank of return array does not equal 1");
  76
  77       if (retarray->dim[0].ubound + 1 - retarray->dim[0].lbound != rank)
  78         runtime_error ("dimension of return array incorrect");
  79
  80       if (retarray->dim[0].stride == 0)
  81         retarray->dim[0].stride = 1;
  82     }
  83
  84   /* TODO:  It should be a front end job to correctly set the strides.  */
  85
  86   if (array->dim[0].stride == 0)
  87     array->dim[0].stride = 1;
  88
  89   dstride = retarray->dim[0].stride;
  90   dest = retarray->data;
  91   for (n = 0; n < rank; n++)
  92     {
  93       sstride[n] = array->dim[n].stride;
  94       extent[n] = array->dim[n].ubound + 1 - array->dim[n].lbound;
  95       count[n] = 0;
  96       if (extent[n] <= 0)
  97         {
  98           /* Set the return value.  */
  99           for (n = 0; n < rank; n++)
 100             dest[n * dstride] = 0;
 101           return;
 102         }
 103     }
 104
 105   base = array->data;
 106
 107   /* Initialize the return value.  */
 108   for (n = 0; n < rank; n++)
 109     dest[n * dstride] = 1;
 110   {
 111
 112   GFC_REAL_4 minval;
 113
 114   minval = GFC_REAL_4_HUGE;
 115
 116   while (base)
 117     {
 118       {
 119         /* Implementation start.  */
 120
 121   if (*base < minval)
 122     {
 123       minval = *base;
 124       for (n = 0; n < rank; n++)
 125         dest[n * dstride] = count[n] + 1;
 126     }
 127         /* Implementation end.  */
 128       }
 129       /* Advance to the next element.  */
 130       count[0]++;
 131       base += sstride[0];
 132       n = 0;
 133       while (count[n] == extent[n])
 134         {
 135           /* When we get to the end of a dimension, reset it and increment
 136              the next dimension.  */
 137           count[n] = 0;
 138           /* We could precalculate these products, but this is a less
 139              frequently used path so proabably not worth it.  */
 140           base -= sstride[n] * extent[n];
 141           n++;
 142           if (n == rank)
 143             {
 144               /* Break out of the loop.  */
 145               base = NULL;
 146               break;
 147             }
 148           else
 149             {
 150               count[n]++;
 151               base += sstride[n];
 152             }
 153         }
 154     }
 155   }
 156 }
 157
 158
 159 extern void mminloc0_4_r4 (gfc_array_i4 * const restrict,
 160         gfc_array_r4 * const restrict, gfc_array_l4 * const restrict);
 161 export_proto(mminloc0_4_r4);
 162
 163 void
 164 mminloc0_4_r4 (gfc_array_i4 * const restrict retarray,
 165         gfc_array_r4 * const restrict array,
 166         gfc_array_l4 * const restrict mask)
 167 {
 168   index_type count[GFC_MAX_DIMENSIONS];
 169   index_type extent[GFC_MAX_DIMENSIONS];
 170   index_type sstride[GFC_MAX_DIMENSIONS];
 171   index_type mstride[GFC_MAX_DIMENSIONS];
 172   index_type dstride;
 173   GFC_INTEGER_4 *dest;
 174   const GFC_REAL_4 *base;
 175   GFC_LOGICAL_4 *mbase;
 176   int rank;
 177   index_type n;
 178
 179   rank = GFC_DESCRIPTOR_RANK (array);
 180   if (rank <= 0)
 181     runtime_error ("Rank of array needs to be > 0");
 182
 183   if (retarray->data == NULL)
 184     {
 185       retarray->dim[0].lbound = 0;
 186       retarray->dim[0].ubound = rank-1;
 187       retarray->dim[0].stride = 1;
 188       retarray->dtype = (retarray->dtype & ~GFC_DTYPE_RANK_MASK) | 1;
 189       retarray->offset = 0;
 190       retarray->data = internal_malloc_size (sizeof (GFC_INTEGER_4) * rank);
 191     }
 192   else
 193     {
 194       if (GFC_DESCRIPTOR_RANK (retarray) != 1)
 195         runtime_error ("rank of return array does not equal 1");
 196
 197       if (retarray->dim[0].ubound + 1 - retarray->dim[0].lbound != rank)
 198         runtime_error ("dimension of return array incorrect");
 199
 200       if (retarray->dim[0].stride == 0)
 201         retarray->dim[0].stride = 1;
 202     }
 203
 204   /* TODO:  It should be a front end job to correctly set the strides.  */
 205
 206   if (array->dim[0].stride == 0)
 207     array->dim[0].stride = 1;
 208
 209   if (mask->dim[0].stride == 0)
 210     mask->dim[0].stride = 1;
 211
 212   dstride = retarray->dim[0].stride;
 213   dest = retarray->data;
 214   for (n = 0; n < rank; n++)
 215     {
 216       sstride[n] = array->dim[n].stride;
 217       mstride[n] = mask->dim[n].stride;
 218       extent[n] = array->dim[n].ubound + 1 - array->dim[n].lbound;
 219       count[n] = 0;
 220       if (extent[n] <= 0)
 221         {
 222           /* Set the return value.  */
 223           for (n = 0; n < rank; n++)
 224             dest[n * dstride] = 0;
 225           return;
 226         }
 227     }
 228
 229   base = array->data;
 230   mbase = mask->data;
 231
 232   if (GFC_DESCRIPTOR_SIZE (mask) != 4)
 233     {
 234       /* This allows the same loop to be used for all logical types.  */
 235       assert (GFC_DESCRIPTOR_SIZE (mask) == 8);
 236       for (n = 0; n < rank; n++)
 237         mstride[n] <<= 1;
 238       mbase = (GFOR_POINTER_L8_TO_L4 (mbase));
 239     }
 240
 241
 242   /* Initialize the return value.  */
 243   for (n = 0; n < rank; n++)
 244     dest[n * dstride] = 1;
 245   {
 246
 247   GFC_REAL_4 minval;
 248
 249   minval = GFC_REAL_4_HUGE;
 250
 251   while (base)
 252     {
 253       {
 254         /* Implementation start.  */
 255
 256   if (*mbase && *base < minval)
 257     {
 258       minval = *base;
 259       for (n = 0; n < rank; n++)
 260         dest[n * dstride] = count[n] + 1;
 261     }
 262         /* Implementation end.  */
 263       }
 264       /* Advance to the next element.  */
 265       count[0]++;
 266       base += sstride[0];
 267       mbase += mstride[0];
 268       n = 0;
 269       while (count[n] == extent[n])
 270         {
 271           /* When we get to the end of a dimension, reset it and increment
 272              the next dimension.  */
 273           count[n] = 0;
 274           /* We could precalculate these products, but this is a less
 275              frequently used path so proabably not worth it.  */
 276           base -= sstride[n] * extent[n];
 277           mbase -= mstride[n] * extent[n];
 278           n++;
 279           if (n == rank)
 280             {
 281               /* Break out of the loop.  */
 282               base = NULL;
 283               break;
 284             }
 285           else
 286             {
 287               count[n]++;
 288               base += sstride[n];
 289               mbase += mstride[n];
 290             }
 291         }
 292     }
 293   }
 294 }
 295
 296 #endif