| 0,0 → 1,53 |
|---|
| /* 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 (isnan(x)||isnan(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 |
| } |