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52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
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/* Implementation of the NEAREST intrinsic
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Copyright 2003, 2007, 2009, 2010 Free Software Foundation, Inc.
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Contributed by Richard Henderson <rth@redhat.com>.
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This file is part of the GNU Fortran 95 runtime library (libgfortran).
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Libgfortran is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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Libgfortran is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "libgfortran.h"
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#define MATHFUNC(funcname) funcname
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#if defined (HAVE_GFC_REAL_8) && defined (HAVE_COPYSIGN) && defined (HAVE_NEXTAFTER)
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extern GFC_REAL_8 nearest_r8 (GFC_REAL_8 s, GFC_REAL_8 dir);
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export_proto(nearest_r8);
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GFC_REAL_8
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nearest_r8 (GFC_REAL_8 s, GFC_REAL_8 dir)
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{
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dir = MATHFUNC(copysign) (MATHFUNC(__builtin_inf) (), dir);
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if (FLT_EVAL_METHOD != 0)
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{
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/* ??? Work around glibc bug on x86. */
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volatile GFC_REAL_8 r = MATHFUNC(nextafter) (s, dir);
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return r;
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}
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else
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return MATHFUNC(nextafter) (s, dir);
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}
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#endif
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