12116Sjkh/* e_scalbf.c -- float version of e_scalb.c.
22116Sjkh * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
32116Sjkh */
42116Sjkh
52116Sjkh/*
62116Sjkh * ====================================================
72116Sjkh * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
82116Sjkh *
92116Sjkh * Developed at SunPro, a Sun Microsystems, Inc. business.
102116Sjkh * Permission to use, copy, modify, and distribute this
118870Srgrimes * software is freely granted, provided that this notice
122116Sjkh * is preserved.
132116Sjkh * ====================================================
142116Sjkh */
152116Sjkh
16176451Sdas#include <sys/cdefs.h>
17176451Sdas__FBSDID("$FreeBSD$");
182116Sjkh
192116Sjkh#include "math.h"
202116Sjkh#include "math_private.h"
212116Sjkh
222116Sjkh#ifdef _SCALB_INT
2397413Salfredfloat
2497413Salfred__ieee754_scalbf(float x, int fn)
252116Sjkh#else
2697413Salfredfloat
2797413Salfred__ieee754_scalbf(float x, float fn)
282116Sjkh#endif
292116Sjkh{
302116Sjkh#ifdef _SCALB_INT
312116Sjkh	return scalbnf(x,fn);
322116Sjkh#else
33121590Sdas	if ((isnanf)(x)||(isnanf)(fn)) return x*fn;
342116Sjkh	if (!finitef(fn)) {
352116Sjkh	    if(fn>(float)0.0) return x*fn;
362116Sjkh	    else       return x/(-fn);
372116Sjkh	}
382116Sjkh	if (rintf(fn)!=fn) return (fn-fn)/(fn-fn);
392116Sjkh	if ( fn > (float)65000.0) return scalbnf(x, 65000);
402116Sjkh	if (-fn > (float)65000.0) return scalbnf(x,-65000);
412116Sjkh	return scalbnf(x,(int)fn);
422116Sjkh#endif
432116Sjkh}
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