1 /* @(#)e_scalb.c 5.1 93/09/24 */
3 * ====================================================
4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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
10 * ====================================================
12 * $NetBSD: e_scalb.c,v 1.9 2002/05/26 22:01:52 wiz Exp $
13 * $DragonFly: src/lib/libm/src/e_scalb.c,v 1.1 2005/07/26 21:15:20 joerg Exp $
17 * scalb(x, fn) is provide for
18 * passing various standard test suite. One
19 * should use scalbn() instead.
23 #include "math_private.h"
27 scalb(double x
, int fn
)
30 scalb(double x
, double fn
)
36 if (isnan(x
)||isnan(fn
)) return x
*fn
;
38 if(fn
>0.0) return x
*fn
;
41 if (rint(fn
)!=fn
) return (fn
-fn
)/(fn
-fn
);
42 if ( fn
> 65000.0) return scalbn(x
, 65000);
43 if (-fn
> 65000.0) return scalbn(x
,-65000);
44 return scalbn(x
,(int)fn
);