libgfortran/m4/minloc2s.m4

   1 `/* Implementation of the MINLOC intrinsic
   2    Copyright (C) 2017-2024 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`,
  49                                 gfc_charlen_type len)
  50 {
  51   index_type ret;
  52   index_type sstride;
  53   index_type extent;
  54   const 'atype_name` *src;
  55   const 'atype_name` *minval;
  56   index_type i;
  57
  58   extent = GFC_DESCRIPTOR_EXTENT(array,0);
  59   if (extent <= 0)
  60     return 0;
  61
  62   sstride = GFC_DESCRIPTOR_STRIDE(array,0) * len;
  63
  64   ret = 1;
  65   src = array->base_addr;
  66   minval = NULL;
  67   for (i=1; i<=extent; i++)
  68     {
  69       if (minval == NULL || (back ? compare_fcn (src, minval, len) <= 0 :
  70                                     compare_fcn (src, minval, len) < 0))
  71       {
  72          ret = i;
  73          minval = src;
  74       }
  75       src += sstride;
  76     }
  77   return ret;
  78 }
  79
  80 extern 'rtype_name` m'name`'rtype_qual`_'atype_code` ('atype` * const restrict,
  81                     gfc_array_l1 *const restrict mask'back_arg`,
  82                     gfc_charlen_type);
  83 export_proto(m'name`'rtype_qual`_'atype_code`);
  84
  85 'rtype_name`
  86 m'name`'rtype_qual`_'atype_code` ('atype` * const restrict array,
  87                                  gfc_array_l1 * const restrict mask'back_arg`,
  88                                  gfc_charlen_type len)
  89 {
  90   index_type ret;
  91   index_type sstride;
  92   index_type extent;
  93   const 'atype_name` *src;
  94   const 'atype_name` *maxval;
  95   index_type i, j;
  96   GFC_LOGICAL_1 *mbase;
  97   int mask_kind;
  98   index_type mstride;
  99
 100   extent = GFC_DESCRIPTOR_EXTENT(array,0);
 101   if (extent <= 0)
 102     return 0;
 103
 104   sstride = GFC_DESCRIPTOR_STRIDE(array,0) * len;
 105
 106   mask_kind = GFC_DESCRIPTOR_SIZE (mask);
 107   mbase = mask->base_addr;
 108
 109   if (mask_kind == 1 || mask_kind == 2 || mask_kind == 4 || mask_kind == 8
 110 #ifdef HAVE_GFC_LOGICAL_16
 111       || mask_kind == 16
 112 #endif
 113       )
 114     mbase = GFOR_POINTER_TO_L1 (mbase, mask_kind);
 115   else
 116     internal_error (NULL, "Funny sized logical array");
 117
 118   mstride = GFC_DESCRIPTOR_STRIDE_BYTES(mask,0);
 119
 120   /* Search for the first occurrence of a true element in mask. */
 121   for (j=0; j<extent; j++)
 122     {
 123       if (*mbase)
 124         break;
 125       mbase += mstride;
 126     }
 127
 128   if (j == extent)
 129     return 0;
 130
 131   ret = j + 1;
 132   src = array->base_addr + j * sstride;
 133   maxval = src;
 134
 135   for (i=j+1; i<=extent; i++)
 136     {
 137
 138       if (*mbase && (back ? compare_fcn (src, maxval, len) <= 0 :
 139                             compare_fcn (src, maxval, len) < 0))
 140       {
 141          ret = i;
 142          maxval = src;
 143       }
 144       src += sstride;
 145       mbase += mstride;
 146     }
 147   return ret;
 148 }
 149
 150 extern 'rtype_name` s'name`'rtype_qual`_'atype_code` ('atype` * const restrict,
 151                         GFC_LOGICAL_4 *mask'back_arg`, gfc_charlen_type);
 152 export_proto(s'name`'rtype_qual`_'atype_code`);
 153
 154 'rtype_name`
 155 s'name`'rtype_qual`_'atype_code` ('atype` * const restrict array,
 156                                  GFC_LOGICAL_4 *mask'back_arg`, gfc_charlen_type len)
 157 {
 158   if (mask)
 159     return 'name`'rtype_qual`_'atype_code` (array, len, back);
 160   else
 161     return 0;
 162 }
 163
 164 #endif'