| /* 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); |
| } |
| hidden_def (__isnanl) |
| weak_alias (__isnanl, isnanl) |
