File: [cvs.NetBSD.org] / src / lib / libm / src / s_copysign.c (download)
Revision 1.6, Thu Aug 18 23:06:31 1994 UTC (29 years, 8 months ago) by jtc
Branch: MAIN
Changes since 1.5: +2 -2
lines
Change int -> int32_t and unsigned int -> u_int32_t to improve portabilty
to machines where int != 32 bits.
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/* @(#)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.
* ====================================================
*/
#ifndef lint
static char rcsid[] = "$Id: s_copysign.c,v 1.6 1994/08/18 23:06:31 jtc 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"
#ifdef __STDC__
double copysign(double x, double y)
#else
double copysign(x,y)
double x,y;
#endif
{
u_int32_t hx,hy;
GET_HIGH_WORD(hx,x);
GET_HIGH_WORD(hy,y);
SET_HIGH_WORD(x,(hx&0x7fffffff)|(hy&0x80000000));
return x;
}