diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-128/s_isnanl.c')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128/s_isnanl.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/sysdeps/ieee754/ldbl-128/s_isnanl.c b/sysdeps/ieee754/ldbl-128/s_isnanl.c new file mode 100644 index 0000000000..d2fb4038ce --- /dev/null +++ b/sysdeps/ieee754/ldbl-128/s_isnanl.c @@ -0,0 +1,42 @@ +/* s_isnanl.c -- long double version of s_isnan.c. + * Conversion to long double by Jakub Jelinek, jj@ultra.linux.cz. + */ + +/* + * ==================================================== + * 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 + +/* + * isnanl(x) returns 1 is x is nan, else 0; + * no branching! + */ + +#include "math.h" +#include "math_private.h" + +#ifdef __STDC__ + int __isnanl(long double x) +#else + int __isnanl(x) + long double x; +#endif +{ + int64_t hx,lx; + GET_LDOUBLE_WORDS64(hx,lx,x); + hx &= 0x7fffffffffffffffLL; + hx |= (u_int64_t)(lx|(-lx))>>63; + hx = 0x7fff000000000000LL - hx; + return (int)((u_int64_t)hx>>63); +} +weak_alias (__isnanl, isnanl) |