Minor tweak to libstdc++ testsuite helper type
[official-gcc.git] / libquadmath / math / isnanq.c
blob4462d0139e0406ec92ac41d98a01c86ef9202806
1 /* isnanq.c -- __float128 version of s_isnan.c.
2 * Conversion to long double by Jakub Jelinek, jj@ultra.linux.cz.
3 */
5 /*
6 * ====================================================
7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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 * ====================================================
16 #include "quadmath-imp.h"
18 int
19 isnanq (const __float128 x)
21 int64_t hx,lx;
22 GET_FLT128_WORDS64(hx,lx,x);
23 hx &= 0x7fffffffffffffffLL;
24 hx |= (uint64_t)(lx|(-lx))>>63;
25 hx = 0x7fff000000000000LL - hx;
26 return (int)((uint64_t)hx>>63);