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
59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
/* Implementation of the RRSPACING 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_FABS) && defined (HAVE_FREXP)
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extern GFC_REAL_8 rrspacing_r8 (GFC_REAL_8 s, int p);
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export_proto(rrspacing_r8);
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GFC_REAL_8
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rrspacing_r8 (GFC_REAL_8 s, int p)
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{
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int e;
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GFC_REAL_8 x;
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x = fabs (s);
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if (x == 0.)
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return 0.;
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frexp (s, &e);
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#if defined (HAVE_LDEXP)
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return ldexp (x, p - e);
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#else
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return scalbn (x, p - e);
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#endif
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}
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#endif
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