xref: /freebsd/lib/msun/src/s_copysignf.c (revision dba6dd177bdee890cf445fbe21a5dccefd5de18e)
1 /* s_copysignf.c -- float version of s_copysign.c.
2  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3  */
4 
5 /*
6  * ====================================================
7  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
8  *
9  * Developed at SunPro, a Sun Microsystems, Inc. business.
10  * Permission to use, copy, modify, and distribute this
11  * software is freely granted, provided that this notice
12  * is preserved.
13  * ====================================================
14  */
15 
16 #ifndef lint
17 static char rcsid[] = "$FreeBSD$";
18 #endif
19 
20 /*
21  * copysignf(float x, float y)
22  * copysignf(x,y) returns a value with the magnitude of x and
23  * with the sign bit of y.
24  */
25 
26 #include "math.h"
27 #include "math_private.h"
28 
29 float
30 copysignf(float x, float y)
31 {
32 	u_int32_t ix,iy;
33 	GET_FLOAT_WORD(ix,x);
34 	GET_FLOAT_WORD(iy,y);
35 	SET_FLOAT_WORD(x,(ix&0x7fffffff)|(iy&0x80000000));
36         return x;
37 }
38