1df930be7Sderaadt /* @(#)s_copysign.c 5.1 93/09/24 */
2df930be7Sderaadt /*
3df930be7Sderaadt * ====================================================
4df930be7Sderaadt * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
5df930be7Sderaadt *
6df930be7Sderaadt * Developed at SunPro, a Sun Microsystems, Inc. business.
7df930be7Sderaadt * Permission to use, copy, modify, and distribute this
8df930be7Sderaadt * software is freely granted, provided that this notice
9df930be7Sderaadt * is preserved.
10df930be7Sderaadt * ====================================================
11df930be7Sderaadt */
12df930be7Sderaadt
13df930be7Sderaadt /*
14df930be7Sderaadt * copysign(double x, double y)
15df930be7Sderaadt * copysign(x,y) returns a value with the magnitude of x and
16df930be7Sderaadt * with the sign bit of y.
17df930be7Sderaadt */
18df930be7Sderaadt
19390c8400Smartynas #include <float.h>
20390c8400Smartynas #include <math.h>
21390c8400Smartynas
22df930be7Sderaadt #include "math_private.h"
23df930be7Sderaadt
24e7beb4a7Smillert double
copysign(double x,double y)25e7beb4a7Smillert copysign(double x, double y)
26df930be7Sderaadt {
27df930be7Sderaadt u_int32_t hx,hy;
28df930be7Sderaadt GET_HIGH_WORD(hx,x);
29df930be7Sderaadt GET_HIGH_WORD(hy,y);
30df930be7Sderaadt SET_HIGH_WORD(x,(hx&0x7fffffff)|(hy&0x80000000));
31df930be7Sderaadt return x;
32df930be7Sderaadt }
33*2f2c0062Sguenther DEF_STD(copysign);
34*2f2c0062Sguenther LDBL_MAYBE_CLONE(copysign);
35