49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
/* Implementation of the NEAREST intrinsic
|
|
Copyright 2003, 2007, 2009 Free Software Foundation, Inc.
|
|
Contributed by Richard Henderson <rth@redhat.com>.
|
|
|
|
This file is part of the GNU Fortran 95 runtime library (libgfortran).
|
|
|
|
Libgfortran is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 3 of the License, or (at your option) any later version.
|
|
|
|
Libgfortran is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
Under Section 7 of GPL version 3, you are granted additional
|
|
permissions described in the GCC Runtime Library Exception, version
|
|
3.1, as published by the Free Software Foundation.
|
|
|
|
You should have received a copy of the GNU General Public License and
|
|
a copy of the GCC Runtime Library Exception along with this program;
|
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include "libgfortran.h"
|
|
|
|
|
|
#if defined (HAVE_GFC_REAL_4) && defined (HAVE_COPYSIGNF) && defined (HAVE_NEXTAFTERF)
|
|
|
|
extern GFC_REAL_4 nearest_r4 (GFC_REAL_4 s, GFC_REAL_4 dir);
|
|
export_proto(nearest_r4);
|
|
|
|
GFC_REAL_4
|
|
nearest_r4 (GFC_REAL_4 s, GFC_REAL_4 dir)
|
|
{
|
|
dir = copysignf (__builtin_inff (), dir);
|
|
if (FLT_EVAL_METHOD != 0)
|
|
{
|
|
/* ??? Work around glibc bug on x86. */
|
|
volatile GFC_REAL_4 r = nextafterf (s, dir);
|
|
return r;
|
|
}
|
|
else
|
|
return nextafterf (s, dir);
|
|
}
|
|
|
|
#endif
|