diff options
Diffstat (limited to 'lib/msun/src/e_scalbf.c')
-rw-r--r-- | lib/msun/src/e_scalbf.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/lib/msun/src/e_scalbf.c b/lib/msun/src/e_scalbf.c new file mode 100644 index 0000000..d49e904 --- /dev/null +++ b/lib/msun/src/e_scalbf.c @@ -0,0 +1,43 @@ +/* e_scalbf.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 <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "math.h" +#include "math_private.h" + +#ifdef _SCALB_INT +float +__ieee754_scalbf(float x, int fn) +#else +float +__ieee754_scalbf(float x, float fn) +#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 ( fn > (float)65000.0) return scalbnf(x, 65000); + if (-fn > (float)65000.0) return scalbnf(x,-65000); + return scalbnf(x,(int)fn); +#endif +} |