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[/] [openrisc/] [trunk/] [gnu-old/] [newlib-1.17.0/] [newlib/] [libm/] [math/] [ef_scalb.c] - Rev 816
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/* 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 }