1 /* s_isnanl.c -- long double version of s_isnan.c.
2 * Conversion to long double by Jakub Jelinek, jj@ultra.linux.cz.
3 */
4
5 /*
6 * ====================================================
7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
8 *
9 * Developed at SunPro, a Sun Microsystems, Inc. business.
10 * Permission to use, copy, modify, and distribute this
11 * software is freely granted, provided that this notice
12 * is preserved.
13 * ====================================================
14 */
15
16 #if defined(LIBM_SCCS) && !defined(lint)
17 static char rcsid[] = "$NetBSD: $";
18 #endif
19
20 /*
21 * isnanq(x) returns 1 is x is nan, else 0;
22 * no branching!
23 */
24
25 #include "quadmath-imp.h"
26
isnanq(__float128 x)27 int isnanq(__float128 x)
28 {
29 int64_t hx,lx;
30 GET_FLT128_WORDS64(hx,lx,x);
31 hx &= 0x7fffffffffffffffLL;
32 hx |= (uint64_t)(lx|(-lx))>>63;
33 hx = 0x7fff000000000000LL - hx;
34 return (int)((uint64_t)hx>>63);
35 }
36