1/* s_finitel.c -- long double version of s_finite.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)
16static char rcsid[] = "$NetBSD: $";
17#endif
18
19/*
20 * finitel(x) returns 1 is x is finite, else 0;
21 * no branching!
22 */
23
24#include <math.h>
25#include <math_private.h>
26#include <math_ldbl_opt.h>
27
28int
29___finitel (long double x)
30{
31 uint64_t hx;
32 double xhi;
33
34 xhi = ldbl_high (x);
35 EXTRACT_WORDS64 (hx, xhi);
36 hx &= 0x7ff0000000000000LL;
37 hx -= 0x7ff0000000000000LL;
38 return hx >> 63;
39}
40hidden_ver (___finitel, __finitel)
41weak_alias (___finitel, ____finitel)
42#if IS_IN (libm)
43long_double_symbol (libm, ____finitel, finitel);
44long_double_symbol (libm, ___finitel, __finitel);
45#else
46long_double_symbol (libc, ____finitel, finitel);
47long_double_symbol (libc, ___finitel, __finitel);
48#endif
49

source code of glibc/sysdeps/ieee754/ldbl-128ibm/s_finitel.c