diff options
Diffstat (limited to 'math/w_expl_compat.c')
| -rw-r--r-- | math/w_expl_compat.c | 48 |
1 files changed, 40 insertions, 8 deletions
diff --git a/math/w_expl_compat.c b/math/w_expl_compat.c index 70096a820c..ec076deaad 100644 --- a/math/w_expl_compat.c +++ b/math/w_expl_compat.c @@ -1,13 +1,45 @@ +/* w_expl.c -- long double version of w_exp.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 + +/* + * wrapper expl(x) + */ + #include <math.h> -#include <stdio.h> -#include <errno.h> +#include <math_private.h> +#include <math-svid-compat.h> -long double -__expl(long double x) +#if LIBM_SVID_COMPAT +long double __expl(long double x) /* wrapper exp */ { - fputs ("__expl not implemented\n", stderr); - __set_errno (ENOSYS); - return 0.0; -} +# ifdef _IEEE_LIBM + return __ieee754_expl(x); +# else + long double z = __ieee754_expl (x); + if (__glibc_unlikely (!isfinite (z) || z == 0) + && isfinite (x) && _LIB_VERSION != _IEEE_) + return __kernel_standard_l (x, x, 206 + !!signbit (x)); + return z; +# endif +} +hidden_def (__expl) weak_alias (__expl, expl) +#endif |