Add the DragonFly cvs id and perform general cleanups on cvs/rcs/sccs ids. Most
[dragonfly.git] / lib / msun / src / s_copysign.c
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  * $FreeBSD: src/lib/msun/src/s_copysign.c,v 1.6 1999/08/28 00:06:45 peter Exp $
13  * $DragonFly: src/lib/msun/src/Attic/s_copysign.c,v 1.2 2003/06/17 04:26:53 dillon Exp $
14  */
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
25 #ifdef __STDC__
26         double __generic_copysign(double x, double y)
27 #else
28         double __generic_copysign(x,y)
29         double x,y;
30 #endif
31 {
32         u_int32_t hx,hy;
33         GET_HIGH_WORD(hx,x);
34         GET_HIGH_WORD(hy,y);
35         SET_HIGH_WORD(x,(hx&0x7fffffff)|(hy&0x80000000));
36         return x;
37 }