diff options
Diffstat (limited to 'sysdeps/libm-ieee754/w_expl.c')
| -rw-r--r-- | sysdeps/libm-ieee754/w_expl.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/sysdeps/libm-ieee754/w_expl.c b/sysdeps/libm-ieee754/w_expl.c new file mode 100644 index 0000000..b8152ce --- /dev/null +++ b/sysdeps/libm-ieee754/w_expl.c @@ -0,0 +1,60 @@ +/* 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 "math_private.h" + +#ifdef __STDC__ +static const long double +#else +static long double +#endif +o_threshold= 1.135652340629414394949193107797076489134e4, + /* 0x400C, 0xB17217F7, 0xD1CF79AC */ +u_threshold= -1.140019167866942050398521670162263001513e4; + /* 0x400C, 0xB220C447, 0x69C201E8 */ + +#ifdef __STDC__ + long double __expl(long double x) /* wrapper exp */ +#else + long double __expl(x) /* wrapper exp */ + long double x; +#endif +{ +#ifdef _IEEE_LIBM + return __ieee754_expl(x); +#else + long double z; + z = __ieee754_expl(x); + if(_LIB_VERSION == _IEEE_) return z; + if(__finitel(x)) { + if(x>o_threshold) + return __kernel_standard(x,x,206); /* exp overflow */ + else if(x<u_threshold) + return __kernel_standard(x,x,207); /* exp underflow */ + } + return z; +#endif +} +weak_alias (__expl, expl) |