1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
/* s_isnanl.c -- long double version of s_isnan.c.
* Conversion to long double by Jakub Jelinek, jj@ultra.linux.cz.
*/
/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
*
* Developed at SunPro, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*/
#if defined(LIBM_SCCS) && !defined(lint)
static char rcsid[] = "$NetBSD: $";
#endif
/*
* isnanl(x) returns 1 is x is nan, else 0;
* no branching!
*/
#include <math.h>
#include <math_private.h>
#include <math_ldbl_opt.h>
int
___isnanl (long double x)
{
uint64_t hx;
double xhi;
xhi = ldbl_high (x);
EXTRACT_WORDS64 (hx, xhi);
hx &= 0x7fffffffffffffffLL;
hx = 0x7ff0000000000000LL - hx;
return (int) (hx >> 63);
}
hidden_ver (___isnanl, __isnanl)
#ifndef IS_IN_libm
weak_alias (___isnanl, ____isnanl)
long_double_symbol (libc, ___isnanl, isnanl);
long_double_symbol (libc, ____isnanl, __isnanl);
#endif
|
