Subversion Repositories openrisc_2011-10-31

/* ef_scalb.c -- float version of e_scalb.c.

 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.

 */

/*

 * ====================================================

 * 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 "fdlibm.h"

#include <limits.h>

#ifdef _SCALB_INT

#ifdef __STDC__

        float __ieee754_scalbf(float x, int fn)

#else

        float __ieee754_scalbf(x,fn)

        float x; int fn;

#endif

#else

#ifdef __STDC__

        float __ieee754_scalbf(float x, float fn)

#else

        float __ieee754_scalbf(x,fn)

        float x, fn;

#endif

#endif

{

#ifdef _SCALB_INT

        return scalbnf(x,fn);

#else

        if (isnanf(x)||isnanf(fn)) return x*fn;

        if (!finitef(fn)) {

            if(fn>(float)0.0) return x*fn;

            else       return x/(-fn);

        }

        if (rintf(fn)!=fn) return (fn-fn)/(fn-fn);

#if INT_MAX > 65000

        if ( fn > (float)65000.0) return scalbnf(x, 65000);

        if (-fn > (float)65000.0) return scalbnf(x,-65000);

#else

        if ( fn > (float)32000.0) return scalbnf(x, 32000);

        if (-fn > (float)32000.0) return scalbnf(x,-32000);

#endif

        return scalbnf(x,(int)fn);

#endif

}