1/* @(#)s_copysign.c 5.1 93/09/24 */
2/*
3 * ====================================================
4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
5 *
6 * Developed at SunPro, a Sun Microsystems, Inc. business.
7 * Permission to use, copy, modify, and distribute this
8 * software is freely granted, provided that this notice
9 * is preserved.
10 * ====================================================
11 */
12
13#include <sys/cdefs.h>
14__FBSDID("$FreeBSD$");
15
16/*
17 * copysign(double x, double y)
18 * copysign(x,y) returns a value with the magnitude of x and
19 * with the sign bit of y.
20 */
21
22#include "math.h"
23#include "math_private.h"
24
25double
26copysign(double x, double y)
27{
28	u_int32_t hx,hy;
29	GET_HIGH_WORD(hx,x);
30	GET_HIGH_WORD(hy,y);
31	SET_HIGH_WORD(x,(hx&0x7fffffff)|(hy&0x80000000));
32        return x;
33}
34