summaryrefslogtreecommitdiff
path: root/libjava/classpath/native/fdlibm/s_copysign.c
blob: 38a9f6f7972435a9c7589057f905c2c7adea2361 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
/* @(#)s_copysign.c 1.3 95/01/18 */
/*
 * ====================================================
 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
 *
 * Developed at SunSoft, a Sun Microsystems, Inc. business.
 * Permission to use, copy, modify, and distribute this
 * software is freely granted, provided that this notice 
 * is preserved.
 * ====================================================
 */

/*
 * copysign(double x, double y)
 * copysign(x,y) returns a value with the magnitude of x and
 * with the sign bit of y.
 */

#include "fdlibm.h"

#ifndef _DOUBLE_IS_32BITS

#ifdef __STDC__
	double copysign(double x, double y)
#else
	double copysign(x,y)
	double x,y;
#endif
{
        uint32_t hx, hy;
	GET_HIGH_WORD(hx, x);
	GET_HIGH_WORD(hy, y);
	SET_HIGH_WORD(x, (hx&0x7fffffff)|(hy&0x80000000));
        return x;
}
#endif /* _DOUBLE_IS_32BITS */