libgfortran/m4/minloc2s.m4

   1 `/* Implementation of the MINLOC intrinsic
   2    Copyright (C) 2017-2018 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` *maxval;
  56   index_type i;
  57
  58   assert(back == 0);
  59   extent = GFC_DESCRIPTOR_EXTENT(array,0);
  60   if (extent <= 0)
  61     return 0;
  62
  63   sstride = GFC_DESCRIPTOR_STRIDE(array,0) * len;
  64
  65   ret = 1;
  66   src = array->base_addr;
  67   maxval = src;
  68   for (i=2; i<=extent; i++)
  69     {
  70       src += sstride;
  71       if (compare_fcn (src, maxval, len) < 0)
  72       {
  73          ret = i;
  74          maxval = src;
  75       }
  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   assert (back == 0);
 101   extent = GFC_DESCRIPTOR_EXTENT(array,0);
 102   if (extent <= 0)
 103     return 0;
 104
 105   sstride = GFC_DESCRIPTOR_STRIDE(array,0) * len;
 106
 107   mask_kind = GFC_DESCRIPTOR_SIZE (mask);
 108   mbase = mask->base_addr;
 109
 110   if (mask_kind == 1 || mask_kind == 2 || mask_kind == 4 || mask_kind == 8
 111 #ifdef HAVE_GFC_LOGICAL_16
 112       || mask_kind == 16
 113 #endif
 114       )
 115     mbase = GFOR_POINTER_TO_L1 (mbase, mask_kind);
 116   else
 117     internal_error (NULL, "Funny sized logical array");
 118
 119   mstride = GFC_DESCRIPTOR_STRIDE_BYTES(mask,0);
 120
 121   /* Search for the first occurrence of a true element in mask. */
 122   for (j=0; j<extent; j++)
 123     {
 124       if (*mbase)
 125         break;
 126       mbase += mstride;
 127     }
 128
 129   if (j == extent)
 130     return 0;
 131
 132   ret = j + 1;
 133   src = array->base_addr + j * sstride;
 134   maxval = src;
 135
 136   for (i=j+1; i<=extent; i++)
 137     {
 138       if (*mbase && compare_fcn (src, maxval, len) < 0)
 139       {
 140          ret = i;
 141          maxval = src;
 142       }
 143       src += sstride;
 144       mbase += mstride;
 145     }
 146   return ret;
 147 }
 148
 149 extern 'rtype_name` s'name`'rtype_qual`_'atype_code` ('atype` * const restrict,
 150                         GFC_LOGICAL_4 *mask'back_arg`, gfc_charlen_type);
 151 export_proto(s'name`'rtype_qual`_'atype_code`);
 152
 153 'rtype_name`
 154 s'name`'rtype_qual`_'atype_code` ('atype` * const restrict array,
 155                                  GFC_LOGICAL_4 *mask'back_arg`, gfc_charlen_type len)
 156 {
 157   if (mask)
 158     return 'name`'rtype_qual`_'atype_code` (array, len, back);
 159   else
 160     return 0;
 161 }
 162
 163 #endif'