1*627f7eb2Smrg /* s_isnanl.c -- long double version of s_isnan.c.
2*627f7eb2Smrg * Conversion to long double by Jakub Jelinek, jj@ultra.linux.cz.
3*627f7eb2Smrg */
4*627f7eb2Smrg
5*627f7eb2Smrg /*
6*627f7eb2Smrg * ====================================================
7*627f7eb2Smrg * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
8*627f7eb2Smrg *
9*627f7eb2Smrg * Developed at SunPro, a Sun Microsystems, Inc. business.
10*627f7eb2Smrg * Permission to use, copy, modify, and distribute this
11*627f7eb2Smrg * software is freely granted, provided that this notice
12*627f7eb2Smrg * is preserved.
13*627f7eb2Smrg * ====================================================
14*627f7eb2Smrg */
15*627f7eb2Smrg
16*627f7eb2Smrg #if defined(LIBM_SCCS) && !defined(lint)
17*627f7eb2Smrg static char rcsid[] = "NetBSD: ";
18*627f7eb2Smrg #endif
19*627f7eb2Smrg
20*627f7eb2Smrg /*
21*627f7eb2Smrg * isnanq(x) returns 1 is x is nan, else 0;
22*627f7eb2Smrg * no branching!
23*627f7eb2Smrg */
24*627f7eb2Smrg
25*627f7eb2Smrg #include "quadmath-imp.h"
26*627f7eb2Smrg
isnanq(__float128 x)27*627f7eb2Smrg int isnanq(__float128 x)
28*627f7eb2Smrg {
29*627f7eb2Smrg int64_t hx,lx;
30*627f7eb2Smrg GET_FLT128_WORDS64(hx,lx,x);
31*627f7eb2Smrg hx &= 0x7fffffffffffffffLL;
32*627f7eb2Smrg hx |= (uint64_t)(lx|(-lx))>>63;
33*627f7eb2Smrg hx = 0x7fff000000000000LL - hx;
34*627f7eb2Smrg return (int)((uint64_t)hx>>63);
35*627f7eb2Smrg }
36