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/*
14 * copysign(double x, double y)
15 * copysign(x,y) returns a value with the magnitude of x and
16 * with the sign bit of y.
17 */
18
19#include <float.h>
20#include <math.h>
21
22#include "math_private.h"
23
24double
25copysign(double x, double y)
26{
27	u_int32_t hx,hy;
28	GET_HIGH_WORD(hx,x);
29	GET_HIGH_WORD(hy,y);
30	SET_HIGH_WORD(x,(hx&0x7fffffff)|(hy&0x80000000));
31        return x;
32}
33DEF_STD(copysign);
34LDBL_MAYBE_CLONE(copysign);
35