1`/* Implementation of the SPACING intrinsic
2   Copyright (C) 2006-2016 Free Software Foundation, Inc.
3   Contributed by Steven G. Kargl <kargl@gcc.gnu.org>
4
5This file is part of the GNU Fortran 95 runtime library (libgfortran).
6
7Libgfortran is free software; you can redistribute it and/or
8modify it under the terms of the GNU General Public
9License as published by the Free Software Foundation; either
10version 3 of the License, or (at your option) any later version.
11
12Libgfortran is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17Under Section 7 of GPL version 3, you are granted additional
18permissions described in the GCC Runtime Library Exception, version
193.1, as published by the Free Software Foundation.
20
21You should have received a copy of the GNU General Public License and
22a copy of the GCC Runtime Library Exception along with this program;
23see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
24<http://www.gnu.org/licenses/>.  */
25
26#include "libgfortran.h"'
27
28include(`mtype.m4')dnl
29
30mathfunc_macro
31
32`#if defined (HAVE_'real_type`) && 'hasmathfunc(frexp)`
33
34extern 'real_type` spacing_r'kind` ('real_type` s, int p, int emin, 'real_type` tiny);
35export_proto(spacing_r'kind`);
36
37'real_type`
38spacing_r'kind` ('real_type` s, int p, int emin, 'real_type` tiny)
39{
40  int e;
41  if (s == 0.)
42    return tiny;
43  MATHFUNC(frexp) (s, &e);
44  e = e - p;
45  e = e > emin ? e : emin;
46#if 'hasmathfunc(ldexp)`
47  return MATHFUNC(ldexp) (1., e);
48#else
49  return MATHFUNC(scalbn) (1., e);
50#endif
51}
52
53#endif'
54