libgfortran/m4/maxloc2s.m4

   1 `/* Implementation of the MAXLOC intrinsic
   2    Copyright (C) 2017-2020 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 #include <assert.h>'
  30 include(iparm.m4)dnl
  31
  32 `#if defined (HAVE_'atype_name`) && defined (HAVE_'rtype_name`)
  33
  34 static inline int
  35 compare_fcn (const 'atype_name` *a, const 'atype_name` *b, gfc_charlen_type n)
  36 {
  37   if (sizeof ('atype_name`) == 1)
  38     return memcmp (a, b, n);
  39   else
  40     return memcmp_char4 (a, b, n);
  41 }
  42
  43 extern 'rtype_name` 'name`'rtype_qual`_'atype_code` ('atype` * const restrict'back_arg`,
  44        gfc_charlen_type);
  45 export_proto('name`'rtype_qual`_'atype_code`);
  46
  47 'rtype_name`
  48 'name`'rtype_qual`_'atype_code` ('atype` * const restrict array'back_arg`, gfc_charlen_type len)
  49 {
  50   index_type ret;
  51   index_type sstride;
  52   index_type extent;
  53   const 'atype_name` *src;
  54   const 'atype_name` *maxval;
  55   index_type i;
  56
  57   extent = GFC_DESCRIPTOR_EXTENT(array,0);
  58   if (extent <= 0)
  59     return 0;
  60
  61   sstride = GFC_DESCRIPTOR_STRIDE(array,0) * len;
  62
  63   ret = 1;
  64   src = array->base_addr;
  65   maxval = NULL;
  66   for (i=1; i<=extent; i++)
  67     {
  68       if (maxval == NULL || (back ? compare_fcn (src, maxval, len) >= 0 :
  69                                     compare_fcn (src, maxval, len) > 0))
  70       {
  71          ret = i;
  72          maxval = src;
  73       }
  74       src += sstride;
  75     }
  76   return ret;
  77 }
  78
  79 extern 'rtype_name` m'name`'rtype_qual`_'atype_code` ('atype` * const restrict,
  80                         gfc_array_l1 *const restrict mask'back_arg`,
  81                         gfc_charlen_type);
  82 export_proto(m'name`'rtype_qual`_'atype_code`);
  83
  84 'rtype_name`
  85 m'name`'rtype_qual`_'atype_code` ('atype` * const restrict array,
  86                                  gfc_array_l1 * const restrict mask'back_arg`,
  87                                  gfc_charlen_type len)
  88 {
  89   index_type ret;
  90   index_type sstride;
  91   index_type extent;
  92   const 'atype_name` *src;
  93   const 'atype_name` *maxval;
  94   index_type i, j;
  95   GFC_LOGICAL_1 *mbase;
  96   int mask_kind;
  97   index_type mstride;
  98
  99   extent = GFC_DESCRIPTOR_EXTENT(array,0);
 100   if (extent <= 0)
 101     return 0;
 102
 103   sstride = GFC_DESCRIPTOR_STRIDE(array,0) * len;
 104
 105   mask_kind = GFC_DESCRIPTOR_SIZE (mask);
 106   mbase = mask->base_addr;
 107
 108   if (mask_kind == 1 || mask_kind == 2 || mask_kind == 4 || mask_kind == 8
 109 #ifdef HAVE_GFC_LOGICAL_16
 110       || mask_kind == 16
 111 #endif
 112       )
 113     mbase = GFOR_POINTER_TO_L1 (mbase, mask_kind);
 114   else
 115     internal_error (NULL, "Funny sized logical array");
 116
 117   mstride = GFC_DESCRIPTOR_STRIDE_BYTES(mask,0);
 118
 119   /* Search for the first occurrence of a true element in mask. */
 120   for (j=0; j<extent; j++)
 121     {
 122       if (*mbase)
 123         break;
 124       mbase += mstride;
 125     }
 126
 127   if (j == extent)
 128     return 0;
 129
 130   ret = j + 1;
 131   src = array->base_addr + j * sstride;
 132   maxval = src;
 133
 134   for (i=j+1; i<=extent; i++)
 135     {
 136       if (*mbase && (back ? compare_fcn (src, maxval, len) >= 0 :
 137                            compare_fcn (src, maxval, len) > 0))
 138       {
 139          ret = i;
 140          maxval = src;
 141       }
 142       src += sstride;
 143       mbase += mstride;
 144     }
 145   return ret;
 146 }
 147
 148 extern 'rtype_name` s'name`'rtype_qual`_'atype_code` ('atype` * const restrict,
 149                                GFC_LOGICAL_4 *mask'back_arg`, gfc_charlen_type);
 150 export_proto(s'name`'rtype_qual`_'atype_code`);
 151
 152 'rtype_name`
 153 s'name`'rtype_qual`_'atype_code` ('atype` * const restrict array,
 154                                  GFC_LOGICAL_4 *mask'back_arg`, gfc_charlen_type len)
 155 {
 156   if (mask)
 157     return 'name`'rtype_qual`_'atype_code` (array, len, back);
 158   else
 159     return 0;
 160 }
 161
 162 #endif'