54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
|
/* Implementation of the SPACING intrinsic
|
||
|
Copyright 2006 Free Software Foundation, Inc.
|
||
|
Contributed by Steven G. Kargl <kargl@gcc.gnu.org>
|
||
|
|
||
|
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 2 of the License, or (at your option) any later version.
|
||
|
|
||
|
In addition to the permissions in the GNU General Public License, the
|
||
|
Free Software Foundation gives you unlimited permission to link the
|
||
|
compiled version of this file into combinations with other programs,
|
||
|
and to distribute those combinations without any restriction coming
|
||
|
from the use of this file. (The General Public License restrictions
|
||
|
do apply in other respects; for example, they cover modification of
|
||
|
the file, and distribution when not linked into a combine
|
||
|
executable.)
|
||
|
|
||
|
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.
|
||
|
|
||
|
You should have received a copy of the GNU General Public
|
||
|
License along with libgfortran; see the file COPYING. If not,
|
||
|
write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
||
|
Boston, MA 02110-1301, USA. */
|
||
|
|
||
|
#include "config.h"
|
||
|
#include <math.h>
|
||
|
#include "libgfortran.h"
|
||
|
|
||
|
|
||
|
#if defined (HAVE_GFC_REAL_16) && defined (HAVE_FREXPL) && defined (HAVE_LDEXPL)
|
||
|
|
||
|
extern GFC_REAL_16 spacing_r16 (GFC_REAL_16 s, int p, int emin, GFC_REAL_16 tiny);
|
||
|
export_proto(spacing_r16);
|
||
|
|
||
|
GFC_REAL_16
|
||
|
spacing_r16 (GFC_REAL_16 s, int p, int emin, GFC_REAL_16 tiny)
|
||
|
{
|
||
|
int e;
|
||
|
if (s == 0.)
|
||
|
return tiny;
|
||
|
frexpl (s, &e);
|
||
|
e = e - p;
|
||
|
e = e > emin ? e : emin;
|
||
|
return ldexpl (1., e);
|
||
|
}
|
||
|
|
||
|
#endif
|