1/* e_scalbf.c -- float version of e_scalb.c. 2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. 3 */ 4 5/* 6 * ==================================================== 7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 8 * 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 12 * is preserved. 13 * ==================================================== 14 */ 15 16#include <sys/cdefs.h> 17__FBSDID("$FreeBSD: releng/10.2/lib/msun/src/e_scalbf.c 176451 2008-02-22 02:30:36Z das $"); 18 19#include "math.h" 20#include "math_private.h" 21 22#ifdef _SCALB_INT 23float 24__ieee754_scalbf(float x, int fn) 25#else 26float 27__ieee754_scalbf(float x, float fn) 28#endif 29{ 30#ifdef _SCALB_INT 31 return scalbnf(x,fn); 32#else 33 if ((isnanf)(x)||(isnanf)(fn)) return x*fn; 34 if (!finitef(fn)) { 35 if(fn>(float)0.0) return x*fn; 36 else return x/(-fn); 37 } 38 if (rintf(fn)!=fn) return (fn-fn)/(fn-fn); 39 if ( fn > (float)65000.0) return scalbnf(x, 65000); 40 if (-fn > (float)65000.0) return scalbnf(x,-65000); 41 return scalbnf(x,(int)fn); 42#endif 43} 44