POK
copysignf.c
1 /*
2  * POK header
3  *
4  * The following file is a part of the POK project. Any modification should
5  * made according to the POK licence. You CANNOT use this file or a part of
6  * this file is this part of a file for your own project
7  *
8  * For more information on the POK licence, please see our LICENCE FILE
9  *
10  * Please follow the coding guidelines described in doc/CODING_GUIDELINES
11  *
12  * Copyright (c) 2007-2009 POK team
13  *
14  * Created by julien on Fri Jan 30 14:41:34 2009
15  */
16 
17 /* s_copysignf.c -- float version of s_copysign.c.
18  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
19  */
20 
21 /*
22  * ====================================================
23  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
24  *
25  * Developed at SunPro, a Sun Microsystems, Inc. business.
26  * Permission to use, copy, modify, and distribute this
27  * software is freely granted, provided that this notice
28  * is preserved.
29  * ====================================================
30  */
31 
32 /*
33  * copysignf(float x, float y)
34  * copysignf(x,y) returns a value with the magnitude of x and
35  * with the sign bit of y.
36  */
37 
38 #ifdef POK_NEEDS_LIBMATH
39 #include "math_private.h"
40 
41 float
42 copysignf(float x, float y)
43 {
44  uint32_t ix,iy;
45  GET_FLOAT_WORD(ix,x);
46  GET_FLOAT_WORD(iy,y);
47  SET_FLOAT_WORD(x,(ix&0x7fffffff)|(iy&0x80000000));
48  return x;
49 }
50 
51 #endif