1 /* e_scalbf.c -- float version of e_scalb.c.
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
6 * ====================================================
7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
9 * Developed at SunPro, a Sun Microsystems, Inc. business.
10 * Permission to use, copy, modify, and distribute this
11 * software is freely granted, provided that this notice
13 * ====================================================
16 #include <sys/cdefs.h>
17 #if defined(LIBM_SCCS) && !defined(lint)
18 __RCSID("$NetBSD: e_scalbf.c,v 1.7 2010/04/23 19:17:07 drochner Exp $");
21 #include "namespace.h"
23 #include "math_private.h"
27 __ieee754_scalbf(float x
, int fn
)
30 __ieee754_scalbf(float x
, float fn
)
36 if (isnanf(x
)||isnanf(fn
)) return x
*fn
;
38 if(fn
>(float)0.0) return x
*fn
;
41 if (rintf(fn
)!=fn
) return (fn
-fn
)/(fn
-fn
);
42 if ( fn
> (float)65000.0) return scalbnf(x
, 65000);
43 if (-fn
> (float)65000.0) return scalbnf(x
,-65000);
44 return scalbnf(x
,(int)fn
);