diff options
Diffstat (limited to 'math/e_scalbl.c')
| -rw-r--r-- | math/e_scalbl.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/math/e_scalbl.c b/math/e_scalbl.c new file mode 100644 index 0000000000..1f5677d9f4 --- /dev/null +++ b/math/e_scalbl.c @@ -0,0 +1,75 @@ +/* e_scalbl.c -- long double version of s_scalb.c. + * Conversion to long double by Ulrich Drepper, + * Cygnus Support, drepper@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. + * ==================================================== + */ + +#if defined(LIBM_SCCS) && !defined(lint) +static char rcsid[] = "$NetBSD: $"; +#endif + +/* + * __ieee754_scalbl(x, fn) is provide for + * passing various standard test suite. One + * should use scalbnl() instead. + */ + +#include <fenv.h> +#include <math.h> +#include "math_private.h" + +#ifdef _SCALB_INT +#ifdef __STDC__ + long double __ieee754_scalbl(long double x, int fn) +#else + long double __ieee754_scalbl(x,fn) + long double x; int fn; +#endif +#else +#ifdef __STDC__ + long double __ieee754_scalbl(long double x, long double fn) +#else + long double __ieee754_scalbl(x,fn) + long double x, fn; +#endif +#endif +{ +#ifdef _SCALB_INT + return __scalbnl(x,fn); +#else + if (__isnanl(x)||__isnanl(fn)) return x*fn; + if (!__finitel(fn)) { + if(fn>0.0) return x*fn; + else if (x == 0) + return x; + else if (!__finitel (x)) + { +# ifdef FE_INVALID + feraiseexcept (FE_INVALID); +# endif + return __nanl (""); + } + else return x/(-fn); + } + if (__rintl(fn)!=fn) + { +# ifdef FE_INVALID + feraiseexcept (FE_INVALID); +# endif + return __nanl (""); + } + if ( fn > 65000.0) return __scalbnl(x, 65000); + if (-fn > 65000.0) return __scalbnl(x,-65000); + return __scalbnl(x,(int)fn); +#endif +} |