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4010308ce5
2006-10-13 Steven G. Kargl <kargl@gcc.gnu.org>
* m4/spacing.m4: Use scalbn[f,l] if ldexp[f,l] is unavailable.
* m4/rrspacing.m4: Ditto.
* generated/spacing_r4.c: Regenerated.
* generated/spacing_r8.c: Ditto.
* generated/spacing_r10.c: Ditto.
* generated/spacing_r16.c: Ditto.
* generated/rrspacing_r4.c: Ditto.
* generated/rrspacing_r8.c: Ditto.
* generated/rrspacing_r10.c: Ditto.
* generated/rrspacing_r16.c: Ditto.
From-SVN: r117703
58 lines
1.9 KiB
C
58 lines
1.9 KiB
C
/* Implementation of the SPACING intrinsic
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Copyright 2006 Free Software Foundation, Inc.
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Contributed by Steven G. Kargl <kargl@gcc.gnu.org>
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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 2 of the License, or (at your option) any later version.
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In addition to the permissions in the GNU General Public License, the
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Free Software Foundation gives you unlimited permission to link the
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compiled version of this file into combinations with other programs,
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and to distribute those combinations without any restriction coming
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from the use of this file. (The General Public License restrictions
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do apply in other respects; for example, they cover modification of
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the file, and distribution when not linked into a combine
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executable.)
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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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You should have received a copy of the GNU General Public
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License along with libgfortran; see the file COPYING. If not,
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write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#include "config.h"
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#include <math.h>
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#include "libgfortran.h"
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#if defined (HAVE_GFC_REAL_8) && defined (HAVE_FREXP)
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extern GFC_REAL_8 spacing_r8 (GFC_REAL_8 s, int p, int emin, GFC_REAL_8 tiny);
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export_proto(spacing_r8);
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GFC_REAL_8
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spacing_r8 (GFC_REAL_8 s, int p, int emin, GFC_REAL_8 tiny)
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{
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int e;
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if (s == 0.)
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return tiny;
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frexp (s, &e);
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e = e - p;
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e = e > emin ? e : emin;
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#if defined (HAVE_LDEXP)
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return ldexp (1., e);
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#else
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return scalbn (1., e);
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#endif
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}
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#endif
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