libgfortran/generated/product_r4.c

   1 /* Implementation of the PRODUCT 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 (libgfor).
   6
   7 Libgfortran is free software; you can redistribute it and/or
   8 modify it under the terms of the GNU Lesser General Public
   9 License as published by the Free Software Foundation; either
  10 version 2.1 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 Lesser General Public License for more details.
  16
  17 You should have received a copy of the GNU Lesser General Public
  18 License along with libgfor; see the file COPYING.LIB.  If not,
  19 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 #include "config.h"
  23 #include <stdlib.h>
  24 #include <assert.h>
  25 #include "libgfortran.h"
  26
  27
  28 void
  29 __product_r4 (gfc_array_r4 * retarray, gfc_array_r4 *array, index_type *pdim)
  30 {
  31   index_type count[GFC_MAX_DIMENSIONS - 1];
  32   index_type extent[GFC_MAX_DIMENSIONS - 1];
  33   index_type sstride[GFC_MAX_DIMENSIONS - 1];
  34   index_type dstride[GFC_MAX_DIMENSIONS - 1];
  35   GFC_REAL_4 *base;
  36   GFC_REAL_4 *dest;
  37   index_type rank;
  38   index_type n;
  39   index_type len;
  40   index_type delta;
  41   index_type dim;
  42
  43   /* Make dim zero based to avoid confusion.  */
  44   dim = (*pdim) - 1;
  45   rank = GFC_DESCRIPTOR_RANK (array) - 1;
  46   assert (rank == GFC_DESCRIPTOR_RANK (retarray));
  47   if (array->dim[0].stride == 0)
  48     array->dim[0].stride = 1;
  49   if (retarray->dim[0].stride == 0)
  50     retarray->dim[0].stride = 1;
  51
  52   len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
  53   if (len <= 0)
  54     return;
  55   delta = array->dim[dim].stride;
  56
  57   for (n = 0; n < dim; n++)
  58     {
  59       sstride[n] = array->dim[n].stride;
  60       extent[n] = array->dim[n].ubound + 1 - array->dim[n].lbound;
  61     }
  62   for (n = dim; n < rank; n++)
  63     {
  64       sstride[n] = array->dim[n + 1].stride;
  65       extent[n] =
  66         array->dim[n + 1].ubound + 1 - array->dim[n + 1].lbound;
  67     }
  68
  69   for (n = 0; n < rank; n++)
  70     {
  71       count[n] = 0;
  72       dstride[n] = retarray->dim[n].stride;
  73       if (extent[n] <= 0)
  74         return;
  75     }
  76
  77   base = array->data;
  78   dest = retarray->data;
  79
  80   while (base)
  81     {
  82       GFC_REAL_4 *src;
  83       GFC_REAL_4 result;
  84       src = base;
  85       {
  86
  87   result = 1;
  88        for (n = 0; n < len; n++, src += delta)
  89           {
  90
  91   result *= *src;
  92           }
  93         *dest = result;
  94       }
  95       /* Advance to the next element.  */
  96       count[0]++;
  97       base += sstride[0];
  98       dest += dstride[0];
  99       n = 0;
 100       while (count[n] == extent[n])
 101         {
 102           /* When we get to the end of a dimension, reset it and increment
 103              the next dimension.  */
 104           count[n] = 0;
 105           /* We could precalculate these products, but this is a less
 106              frequently used path so proabably not worth it.  */
 107           base -= sstride[n] * extent[n];
 108           dest -= dstride[n] * extent[n];
 109           n++;
 110           if (n == rank)
 111             {
 112               /* Break out of the look.  */
 113               base = NULL;
 114               break;
 115             }
 116           else
 117             {
 118               count[n]++;
 119               base += sstride[n];
 120               dest += dstride[n];
 121             }
 122         }
 123     }
 124 }
 125
 126 void
 127 __mproduct_r4 (gfc_array_r4 * retarray, gfc_array_r4 * array, index_type *pdim, gfc_array_l4 * mask)
 128 {
 129   index_type count[GFC_MAX_DIMENSIONS - 1];
 130   index_type extent[GFC_MAX_DIMENSIONS - 1];
 131   index_type sstride[GFC_MAX_DIMENSIONS - 1];
 132   index_type dstride[GFC_MAX_DIMENSIONS - 1];
 133   index_type mstride[GFC_MAX_DIMENSIONS - 1];
 134   GFC_REAL_4 *dest;
 135   GFC_REAL_4 *base;
 136   GFC_LOGICAL_4 *mbase;
 137   int rank;
 138   int dim;
 139   index_type n;
 140   index_type len;
 141   index_type delta;
 142   index_type mdelta;
 143
 144   dim = (*pdim) - 1;
 145   rank = GFC_DESCRIPTOR_RANK (array) - 1;
 146   assert (rank == GFC_DESCRIPTOR_RANK (retarray));
 147   if (array->dim[0].stride == 0)
 148     array->dim[0].stride = 1;
 149   if (retarray->dim[0].stride == 0)
 150     retarray->dim[0].stride = 1;
 151
 152   len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
 153   if (len <= 0)
 154     return;
 155   delta = array->dim[dim].stride;
 156   mdelta = mask->dim[dim].stride;
 157
 158   for (n = 0; n < dim; n++)
 159     {
 160       sstride[n] = array->dim[n].stride;
 161       mstride[n] = mask->dim[n].stride;
 162       extent[n] = array->dim[n].ubound + 1 - array->dim[n].lbound;
 163     }
 164   for (n = dim; n < rank; n++)
 165     {
 166       sstride[n] = array->dim[n + 1].stride;
 167       mstride[n] = mask->dim[n + 1].stride;
 168       extent[n] =
 169         array->dim[n + 1].ubound + 1 - array->dim[n + 1].lbound;
 170     }
 171
 172   for (n = 0; n < rank; n++)
 173     {
 174       count[n] = 0;
 175       dstride[n] = retarray->dim[n].stride;
 176       if (extent[n] <= 0)
 177         return;
 178     }
 179
 180   dest = retarray->data;
 181   base = array->data;
 182   mbase = mask->data;
 183
 184   if (GFC_DESCRIPTOR_SIZE (mask) != 4)
 185     {
 186       /* This allows the same loop to be used for all logical types.  */
 187       assert (GFC_DESCRIPTOR_SIZE (mask) == 8);
 188       for (n = 0; n < rank; n++)
 189         mstride[n] <<= 1;
 190       mdelta <<= 1;
 191       mbase = (GFOR_POINTER_L8_TO_L4 (mbase));
 192     }
 193
 194   while (base)
 195     {
 196       GFC_REAL_4 *src;
 197       GFC_LOGICAL_4 *msrc;
 198       GFC_REAL_4 result;
 199       src = base;
 200       msrc = mbase;
 201       {
 202
 203   result = 1;
 204         for (n = 0; n < len; n++, src += delta, msrc += mdelta)
 205           {
 206
 207   if (*msrc)
 208     result *= *src;
 209           }
 210         *dest = result;
 211       }
 212       /* Advance to the next element.  */
 213       count[0]++;
 214       base += sstride[0];
 215       mbase += mstride[0];
 216       dest += dstride[0];
 217       n = 0;
 218       while (count[n] == extent[n])
 219         {
 220           /* When we get to the end of a dimension, reset it and increment
 221              the next dimension.  */
 222           count[n] = 0;
 223           /* We could precalculate these products, but this is a less
 224              frequently used path so proabably not worth it.  */
 225           base -= sstride[n] * extent[n];
 226           mbase -= mstride[n] * extent[n];
 227           dest -= dstride[n] * extent[n];
 228           n++;
 229           if (n == rank)
 230             {
 231               /* Break out of the look.  */
 232               base = NULL;
 233               break;
 234             }
 235           else
 236             {
 237               count[n]++;
 238               base += sstride[n];
 239               mbase += mstride[n];
 240               dest += dstride[n];
 241             }
 242         }
 243     }
 244 }
 245