libgfortran/generated/minloc2_4_s4.c

   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
  31 #if defined (HAVE_GFC_UINTEGER_4) && defined (HAVE_GFC_INTEGER_4)
  32
  33 static inline int
  34 compare_fcn (const GFC_UINTEGER_4 *a, const GFC_UINTEGER_4 *b, gfc_charlen_type n)
  35 {
  36   if (sizeof (GFC_UINTEGER_4) == 1)
  37     return memcmp (a, b, n);
  38   else
  39     return memcmp_char4 (a, b, n);
  40 }
  41
  42 extern GFC_INTEGER_4 minloc2_4_s4 (gfc_array_s4 * const restrict, GFC_LOGICAL_4 back,
  43        gfc_charlen_type);
  44 export_proto(minloc2_4_s4);
  45
  46 GFC_INTEGER_4
  47 minloc2_4_s4 (gfc_array_s4 * const restrict array, GFC_LOGICAL_4 back,
  48                                 gfc_charlen_type len)
  49 {
  50   index_type ret;
  51   index_type sstride;
  52   index_type extent;
  53   const GFC_UINTEGER_4 *src;
  54   const GFC_UINTEGER_4 *minval;
  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   minval = NULL;
  66   for (i=1; i<=extent; i++)
  67     {
  68       if (minval == NULL || (back ? compare_fcn (src, minval, len) <= 0 :
  69                                     compare_fcn (src, minval, len) < 0))
  70       {
  71          ret = i;
  72          minval = src;
  73       }
  74       src += sstride;
  75     }
  76   return ret;
  77 }
  78
  79 extern GFC_INTEGER_4 mminloc2_4_s4 (gfc_array_s4 * const restrict,
  80                     gfc_array_l1 *const restrict mask, GFC_LOGICAL_4 back,
  81                     gfc_charlen_type);
  82 export_proto(mminloc2_4_s4);
  83
  84 GFC_INTEGER_4
  85 mminloc2_4_s4 (gfc_array_s4 * const restrict array,
  86                                  gfc_array_l1 * const restrict mask, GFC_LOGICAL_4 back,
  87                                  gfc_charlen_type len)
  88 {
  89   index_type ret;
  90   index_type sstride;
  91   index_type extent;
  92   const GFC_UINTEGER_4 *src;
  93   const GFC_UINTEGER_4 *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
 137       if (*mbase && (back ? compare_fcn (src, maxval, len) <= 0 :
 138                             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 GFC_INTEGER_4 sminloc2_4_s4 (gfc_array_s4 * const restrict,
 150                         GFC_LOGICAL_4 *mask, GFC_LOGICAL_4 back, gfc_charlen_type);
 151 export_proto(sminloc2_4_s4);
 152
 153 GFC_INTEGER_4
 154 sminloc2_4_s4 (gfc_array_s4 * const restrict array,
 155                                  GFC_LOGICAL_4 *mask, GFC_LOGICAL_4 back, gfc_charlen_type len)
 156 {
 157   if (mask)
 158     return minloc2_4_s4 (array, len, back);
 159   else
 160     return 0;
 161 }
 162
 163 #endif