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36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
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/* Return nonzero value if number is negative.
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Copyright (C) 1997, 2009 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <math.h>
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#include "math_private.h"
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int
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__signbit (double x)
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{
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int32_t hx;
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GET_HIGH_WORD (hx, x);
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return hx & 0x80000000;
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}
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#ifdef NO_LONG_DOUBLE
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strong_alias (__signbit, __signbitl)
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#endif
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