diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-128ibm/s_isnanl.c')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128ibm/s_isnanl.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_isnanl.c b/sysdeps/ieee754/ldbl-128ibm/s_isnanl.c new file mode 100644 index 0000000..ae5ba8e --- /dev/null +++ b/sysdeps/ieee754/ldbl-128ibm/s_isnanl.c @@ -0,0 +1,43 @@ +/* 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" +#include <math_ldbl_opt.h> + +int +___isnanl (long double x) +{ + int64_t hx,lx; + GET_LDOUBLE_WORDS64(hx,lx,x); + hx &= 0x7fffffffffffffffLL; + hx = 0x7ff0000000000000LL - hx; + return (int)((u_int64_t)hx>>63); +} +hidden_ver (___isnanl, __isnanl) +#ifndef IS_IN_libm +weak_alias (___isnanl, ____isnanl) +long_double_symbol (libc, ___isnanl, isnanl); +long_double_symbol (libc, ____isnanl, __isnanl); +#endif |