libgfortran/generated/nearest_r4.c

   1 /* Implementation of the NEAREST intrinsic
   2    Copyright 2003 Free Software Foundation, Inc.
   3    Contributed by Richard Henderson <rth@redhat.com>.
   4
   5 This file is part of the GNU Fortran 95 runtime library (libgfor).
   6
   7 Libgfor is free software; you can redistribute it and/or
   8 modify it under the terms of the GNU Lesser General Public
   9 License as published by the Free Software Foundation; either
  10 version 2.1 of the License, or (at your option) any later version.
  11
  12 Ligbfor 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 Lesser General Public License for more details.
  16
  17 You should have received a copy of the GNU Lesser General Public
  18 License along with libgfor; see the file COPYING.LIB.  If not,
  19 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21 #include <math.h>
  22 #include <float.h>
  23 #include "libgfortran.h"
  24
  25
  26 GFC_REAL_4
  27 prefix(nearest_r4) (GFC_REAL_4 s, GFC_REAL_4 dir)
  28 {
  29   dir = copysignf (__builtin_inff (), dir);
  30   if (FLT_EVAL_METHOD != 0)
  31     {
  32       /* ??? Work around glibc bug on x86.  */
  33       volatile GFC_REAL_4 r = nextafterf (s, dir);
  34       return r;
  35     }
  36   else
  37     return nextafterf (s, dir);
  38 }