1/* `HUGE_VALL' constant for ix86 (where it is infinity).
2 Used by <stdlib.h> and <math.h> functions for overflow.
3 Copyright (C) 1992-2014 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
19
20#ifndef _MATH_H
21# error "Never use <bits/huge_vall.h> directly; include <math.h> instead."
22#endif
23
24#if __GNUC_PREREQ(3,3)
25# define HUGE_VALL (__builtin_huge_vall())
26#elif __GNUC_PREREQ(2,96)
27# define HUGE_VALL (__extension__ 0x1.0p32767L)
28#else
29
30# define __HUGE_VALL_bytes { 0, 0, 0, 0, 0, 0, 0, 0x80, 0xff, 0x7f, 0, 0 }
31
32# define __huge_vall_t union { unsigned char __c[12]; long double __ld; }
33# ifdef __GNUC__
34# define HUGE_VALL (__extension__ \
35 ((__huge_vall_t) { __c: __HUGE_VALL_bytes }).__ld)
36# else /* Not GCC. */
37static __huge_vall_t __huge_vall = { __HUGE_VALL_bytes };
38# define HUGE_VALL (__huge_vall.__ld)
39# endif /* GCC. */
40
41#endif /* GCC 2.95 */
42