1 | /* s_isnanl.c -- long double version of s_isnan.c. |
2 | */ |
3 | |
4 | /* |
5 | * ==================================================== |
6 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
7 | * |
8 | * Developed at SunPro, a Sun Microsystems, Inc. business. |
9 | * Permission to use, copy, modify, and distribute this |
10 | * software is freely granted, provided that this notice |
11 | * is preserved. |
12 | * ==================================================== |
13 | */ |
14 | |
15 | #if defined(LIBM_SCCS) && !defined(lint) |
16 | static char rcsid[] = "$NetBSD: $" ; |
17 | #endif |
18 | |
19 | /* |
20 | * isnanl(x) returns 1 is x is nan, else 0; |
21 | * no branching! |
22 | */ |
23 | |
24 | #include <math.h> |
25 | #include <math_private.h> |
26 | |
27 | int __isnanl(_Float128 x) |
28 | { |
29 | int64_t hx,lx; |
30 | GET_LDOUBLE_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 | mathx_hidden_def (__isnanl) |
37 | weak_alias (__isnanl, isnanl) |
38 | |