36 lines
908 B
C
36 lines
908 B
C
/* @(#)s_copysign.c 5.1 93/09/24 */
|
|
/*
|
|
* ====================================================
|
|
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
|
*
|
|
* Developed at SunPro, a Sun Microsystems, Inc. business.
|
|
* Permission to use, copy, modify, and distribute this
|
|
* software is freely granted, provided that this notice
|
|
* is preserved.
|
|
* ====================================================
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#if defined(LIBM_SCCS) && !defined(lint)
|
|
__RCSID("$NetBSD: s_copysign.c,v 1.11 2002/05/26 22:01:54 wiz Exp $");
|
|
#endif
|
|
|
|
/*
|
|
* copysign(double x, double y)
|
|
* copysign(x,y) returns a value with the magnitude of x and
|
|
* with the sign bit of y.
|
|
*/
|
|
|
|
#include "math.h"
|
|
#include "math_private.h"
|
|
|
|
double
|
|
copysign(double x, double y)
|
|
{
|
|
unsigned long hx,hy;
|
|
GET_HIGH_WORD(hx,x);
|
|
GET_HIGH_WORD(hy,y);
|
|
SET_HIGH_WORD(x,(hx&0x7fffffff)|(hy&0x80000000));
|
|
return x;
|
|
}
|