1 
2 /* @(#)s_copysign.c 1.3 95/01/18 */
3 /*
4  * ====================================================
5  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
6  *
7  * Developed at SunSoft, a Sun Microsystems, Inc. business.
8  * Permission to use, copy, modify, and distribute this
9  * software is freely granted, provided that this notice
10  * is preserved.
11  * ====================================================
12  */
13 
14 /*
15  * copysign(double x, double y)
16  * copysign(x,y) returns a value with the magnitude of x and
17  * with the sign bit of y.
18  */
19 
20 #include "fdlibm.h"
21 
22 #ifndef _DOUBLE_IS_32BITS
23 
24 #ifdef __STDC__
copysign(double x,double y)25 	double copysign(double x, double y)
26 #else
27 	double copysign(x,y)
28 	double x,y;
29 #endif
30 {
31         uint32_t hx, hy;
32 	GET_HIGH_WORD(hx, x);
33 	GET_HIGH_WORD(hy, y);
34 	SET_HIGH_WORD(x, (hx&0x7fffffff)|(hy&0x80000000));
35         return x;
36 }
37 #endif /* _DOUBLE_IS_32BITS */
38