/* Implementation of the SPACING intrinsic Copyright 2006, 2007, 2009 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 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_8) && defined (HAVE_FREXP) extern GFC_REAL_8 spacing_r8 (GFC_REAL_8 s, int p, int emin, GFC_REAL_8 tiny); export_proto(spacing_r8); GFC_REAL_8 spacing_r8 (GFC_REAL_8 s, int p, int emin, GFC_REAL_8 tiny) { int e; if (s == 0.) return tiny; frexp (s, &e); e = e - p; e = e > emin ? e : emin; #if defined (HAVE_LDEXP) return ldexp (1., e); #else return scalbn (1., e); #endif } #endif