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/* $NetBSD: s_copysignl.c,v 1.5 2015/05/14 19:26:12 joerg Exp $ */
/*-
* Copyright (c) 2010 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: s_copysignl.c,v 1.5 2015/05/14 19:26:12 joerg Exp $");
#include "namespace.h"
#include <math.h>
#include <machine/ieee.h>
#if defined(__HAVE_LONG_DOUBLE) || defined(__HAVE_IBM_LONGDOUBLE)
#ifdef __weak_alias
__weak_alias(copysignl, _copysignl)
#endif
/*
* copysignl(long double x, long double y)
* This function returns a value with the magnitude of x and the sign of y.
*/
#ifdef EXT_EXP_INFNAN
long double
copysignl(long double x, long double y)
{
union ieee_ext_u ux, uy;
ux.extu_ld = x;
uy.extu_ld = y;
ux.extu_ext.ext_sign = uy.extu_ext.ext_sign;
return (ux.extu_ld);
}
#elif defined(__HAVE_IBM_LONGDOUBLE)
long double
copysignl(long double x, long double y)
{
union ldbl_u ux, uy;
ux.ldblu_ld = x;
uy.ldblu_ld = y;
ux.ldblu_d[0] = copysign(ux.ldblu_d[0], uy.ldblu_d[0]);
ux.ldblu_d[1] = copysign(ux.ldblu_d[1], uy.ldblu_d[1]);
return ux.ldblu_ld;
}
#endif
#endif /* __HAVE_LONG_DOUBLE || __HAVE_IBM_LONGDOUBLE */
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