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* lib/copysign.c: * lib/isfinite.c: * lib/isnanf-nolibm.h: * lib/isnanl-nolibm.h: * lib/signbitd.c: * lib/signbitf.c: * lib/signbitl.c: * m4/copysign.m4: * m4/isfinite.m4: * m4/signbit.m4: New files.
51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
/* Test for finite value (zero, subnormal, or normal, and not infinite or NaN).
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Copyright (C) 2007-2013 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, see <http://www.gnu.org/licenses/>. */
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/* Written by Ben Pfaff <blp@gnu.org>, 2007. */
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#include <config.h>
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#include "isnanf-nolibm.h"
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#include "isnand-nolibm.h"
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#include "isnanl-nolibm.h"
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/* The "cc" compiler on HP-UX 11.11, when optimizing, simplifies the test
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x - y == 0.0 to x == y, a simplification which is invalid when x and y
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are Infinity. Disable this optimization. */
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#if defined __hpux && !defined __GNUC__
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static float zerof;
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static double zerod;
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static long double zerol;
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#else
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# define zerof 0.f
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# define zerod 0.
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# define zerol 0.L
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#endif
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int gl_isfinitef (float x)
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{
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return !isnanf (x) && x - x == zerof;
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}
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int gl_isfinited (double x)
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{
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return !isnand (x) && x - x == zerod;
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}
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int gl_isfinitel (long double x)
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{
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return !isnanl (x) && x - x == zerol;
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}
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