Atlas - s_copysign.c
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[FILE BEGIN]
1#include "SDL_internal.h"
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
13/*
14 * copysign(double x, double y)
15 * copysign(x,y) returns a value with the magnitude of x and
16 * with the sign bit of y.
17 */
18
19#include "math_libm.h"
20#include "math_private.h"
21
22double copysign(double x, double y)
23{
24	u_int32_t hx,hy;
25	GET_HIGH_WORD(hx,x);
26	GET_HIGH_WORD(hy,y);
27	SET_HIGH_WORD(x,(hx&0x7fffffff)|(hy&0x80000000));
28        return x;
29}
30libm_hidden_def(copysign)
31
[FILE END]
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