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 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