libgfortran/generated/maxloc2_4_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_4)
  31
  32 static inline int
  33 compare_fcn (const GFC_INTEGER_4 *a, const GFC_INTEGER_4 *b, int 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_4 maxloc2_4_s4 (gfc_array_s4 * const restrict, int);
  42 export_proto(maxloc2_4_s4);
  43
  44 GFC_INTEGER_4
  45 maxloc2_4_s4 (gfc_array_s4 * const restrict array, gfc_charlen_type len)
  46 {
  47   index_type ret;
  48   index_type sstride;
  49   index_type extent;
  50   const GFC_INTEGER_4 *src;
  51   const GFC_INTEGER_4 *maxval;
  52   index_type i;
  53
  54   extent = GFC_DESCRIPTOR_EXTENT(array,0);
  55   if (extent <= 0)
  56     return 0;
  57
  58   sstride = GFC_DESCRIPTOR_STRIDE(array,0) * len;
  59
  60   ret = 1;
  61   src = array->base_addr;
  62   maxval = src;
  63   for (i=2; i<=extent; i++)
  64     {
  65       src += sstride;
  66       if (compare_fcn (src, maxval, len) > 0)
  67       {
  68          ret = i;
  69          maxval = src;
  70       }
  71     }
  72   return ret;
  73 }
  74
  75 extern GFC_INTEGER_4 mmaxloc2_4_s4 (gfc_array_s4 * const restrict,
  76                         gfc_array_l1 *const restrict mask, gfc_charlen_type);
  77 export_proto(mmaxloc2_4_s4);
  78
  79 GFC_INTEGER_4
  80 mmaxloc2_4_s4 (gfc_array_s4 * const restrict array,
  81                                  gfc_array_l1 * const restrict mask,
  82                                  gfc_charlen_type len)
  83 {
  84   index_type ret;
  85   index_type sstride;
  86   index_type extent;
  87   const GFC_INTEGER_4 *src;
  88   const GFC_INTEGER_4 *maxval;
  89   index_type i, j;
  90   GFC_LOGICAL_1 *mbase;
  91   int mask_kind;
  92   index_type mstride;
  93
  94   extent = GFC_DESCRIPTOR_EXTENT(array,0);
  95   if (extent <= 0)
  96     return 0;
  97
  98   sstride = GFC_DESCRIPTOR_STRIDE(array,0) * len;
  99
 100   mask_kind = GFC_DESCRIPTOR_SIZE (mask);
 101   mbase = mask->base_addr;
 102
 103   if (mask_kind == 1 || mask_kind == 2 || mask_kind == 4 || mask_kind == 8
 104 #ifdef HAVE_GFC_LOGICAL_16
 105       || mask_kind == 16
 106 #endif
 107       )
 108     mbase = GFOR_POINTER_TO_L1 (mbase, mask_kind);
 109   else
 110     internal_error (NULL, "Funny sized logical array");
 111
 112   mstride = GFC_DESCRIPTOR_STRIDE_BYTES(mask,0);
 113
 114   /* Search for the first occurrence of a true element in mask. */
 115   for (j=0; j<extent; j++)
 116     {
 117       if (*mbase)
 118         break;
 119       mbase += mstride;
 120     }
 121
 122   if (j == extent)
 123     return 0;
 124
 125   ret = j + 1;
 126   src = array->base_addr + j * sstride;
 127   maxval = src;
 128
 129   for (i=j+1; i<=extent; i++)
 130     {
 131       if (*mbase && compare_fcn (src, maxval, len) > 0)
 132       {
 133          ret = i;
 134          maxval = src;
 135       }
 136       src += sstride;
 137       mbase += mstride;
 138     }
 139   return ret;
 140 }
 141
 142 extern GFC_INTEGER_4 smaxloc2_4_s4 (gfc_array_s4 * const restrict,
 143                         GFC_LOGICAL_4 *mask, int);
 144 export_proto(smaxloc2_4_s4);
 145
 146 GFC_INTEGER_4
 147 smaxloc2_4_s4 (gfc_array_s4 * const restrict array,
 148                                  GFC_LOGICAL_4 *mask, gfc_charlen_type len)
 149 {
 150   if (mask)
 151     return maxloc2_4_s4 (array, len);
 152   else
 153     return 0;
 154 }
 155
 156 #endif