Atlas - s_copysign.c
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1/*
2 * ====================================================
3 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
4 *
5 * Developed at SunPro, a Sun Microsystems, Inc. business.
6 * Permission to use, copy, modify, and distribute this
7 * software is freely granted, provided that this notice
8 * is preserved.
9 * ====================================================
10 */
11
12/*
13 * copysign(double x, double y)
14 * copysign(x,y) returns a value with the magnitude of x and
15 * with the sign bit of y.
16 */
17
18#include "math_libm.h"
19#include "math_private.h"
20
21double copysign(double x, double y)
22{
23	u_int32_t hx,hy;
24	GET_HIGH_WORD(hx,x);
25	GET_HIGH_WORD(hy,y);
26	SET_HIGH_WORD(x,(hx&0x7fffffff)|(hy&0x80000000));
27        return x;
28}
29libm_hidden_def(copysign)
30
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