s_copysign.c
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/* @(#)s_copysign.c 5.1 93/09/24 */
/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
*
* Developed at SunPro, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*/
/*
* copysign(double x, double y)
* copysign(x,y) returns a value with the magnitude of x and
* with the sign bit of y.
*/
#include <sys/cdefs.h>
#include <float.h>
#include <math.h>
#include "math_private.h"
double
copysign(double x, double y)
{
u_int32_t hx,hy;
GET_HIGH_WORD(hx,x);
GET_HIGH_WORD(hy,y);
SET_HIGH_WORD(x,(hx&0x7fffffff)|(hy&0x80000000));
return x;
}
#if LDBL_MANT_DIG == 53
#ifdef __weak_alias
__weak_alias(copysignl, copysign);
#endif /* __weak_alias */
#endif /* LDBL_MANT_DIG == 53 */