libgfortran/generated/maxloc2_8_s4.c

   1 /* Implementation of the MAXLOC intrinsic
   2    Copyright 2017 Free Software Foundation, Inc.
   3    Contributed by Thomas Koenig
   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 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #if defined (HAVE_GFC_INTEGER_4) && defined (HAVE_GFC_INTEGER_8)
  31
  32 static inline int
  33 compare_fcn (const GFC_INTEGER_4 *a, const GFC_INTEGER_4 *b, gfc_charlen_type n)
  34 {
  35   if (sizeof (GFC_INTEGER_4) == 1)
  36     return memcmp (a, b, n);
  37   else
  38     return memcmp_char4 (a, b, n);
  39 }
  40
  41 extern GFC_INTEGER_8 maxloc2_8_s4 (gfc_array_s4 * const restrict,
  42        gfc_charlen_type);
  43 export_proto(maxloc2_8_s4);
  44
  45 GFC_INTEGER_8
  46 maxloc2_8_s4 (gfc_array_s4 * const restrict array, gfc_charlen_type len)
  47 {
  48   index_type ret;
  49   index_type sstride;
  50   index_type extent;
  51   const GFC_INTEGER_4 *src;
  52   const GFC_INTEGER_4 *maxval;
  53   index_type i;
  54
  55   extent = GFC_DESCRIPTOR_EXTENT(array,0);
  56   if (extent <= 0)
  57     return 0;
  58
  59   sstride = GFC_DESCRIPTOR_STRIDE(array,0) * len;
  60
  61   ret = 1;
  62   src = array->base_addr;
  63   maxval = src;
  64   for (i=2; i<=extent; i++)
  65     {
  66       src += sstride;
  67       if (compare_fcn (src, maxval, len) > 0)
  68       {
  69          ret = i;
  70          maxval = src;
  71       }
  72     }
  73   return ret;
  74 }
  75
  76 extern GFC_INTEGER_8 mmaxloc2_8_s4 (gfc_array_s4 * const restrict,
  77                         gfc_array_l1 *const restrict mask, gfc_charlen_type);
  78 export_proto(mmaxloc2_8_s4);
  79
  80 GFC_INTEGER_8
  81 mmaxloc2_8_s4 (gfc_array_s4 * const restrict array,
  82                                  gfc_array_l1 * const restrict mask,
  83                                  gfc_charlen_type len)
  84 {
  85   index_type ret;
  86   index_type sstride;
  87   index_type extent;
  88   const GFC_INTEGER_4 *src;
  89   const GFC_INTEGER_4 *maxval;
  90   index_type i, j;
  91   GFC_LOGICAL_1 *mbase;
  92   int mask_kind;
  93   index_type mstride;
  94
  95   extent = GFC_DESCRIPTOR_EXTENT(array,0);
  96   if (extent <= 0)
  97     return 0;
  98
  99   sstride = GFC_DESCRIPTOR_STRIDE(array,0) * len;
 100
 101   mask_kind = GFC_DESCRIPTOR_SIZE (mask);
 102   mbase = mask->base_addr;
 103
 104   if (mask_kind == 1 || mask_kind == 2 || mask_kind == 4 || mask_kind == 8
 105 #ifdef HAVE_GFC_LOGICAL_16
 106       || mask_kind == 16
 107 #endif
 108       )
 109     mbase = GFOR_POINTER_TO_L1 (mbase, mask_kind);
 110   else
 111     internal_error (NULL, "Funny sized logical array");
 112
 113   mstride = GFC_DESCRIPTOR_STRIDE_BYTES(mask,0);
 114
 115   /* Search for the first occurrence of a true element in mask. */
 116   for (j=0; j<extent; j++)
 117     {
 118       if (*mbase)
 119         break;
 120       mbase += mstride;
 121     }
 122
 123   if (j == extent)
 124     return 0;
 125
 126   ret = j + 1;
 127   src = array->base_addr + j * sstride;
 128   maxval = src;
 129
 130   for (i=j+1; i<=extent; i++)
 131     {
 132       if (*mbase && compare_fcn (src, maxval, len) > 0)
 133       {
 134          ret = i;
 135          maxval = src;
 136       }
 137       src += sstride;
 138       mbase += mstride;
 139     }
 140   return ret;
 141 }
 142
 143 extern GFC_INTEGER_8 smaxloc2_8_s4 (gfc_array_s4 * const restrict,
 144                                GFC_LOGICAL_4 *mask, gfc_charlen_type);
 145 export_proto(smaxloc2_8_s4);
 146
 147 GFC_INTEGER_8
 148 smaxloc2_8_s4 (gfc_array_s4 * const restrict array,
 149                                  GFC_LOGICAL_4 *mask, gfc_charlen_type len)
 150 {
 151   if (mask)
 152     return maxloc2_8_s4 (array, len);
 153   else
 154     return 0;
 155 }
 156
 157 #endif