mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-30 14:31:14 +00:00
41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
82 lines
2.6 KiB
C
82 lines
2.6 KiB
C
/* `HUGE_VAL' constants for ix86 (where it is infinity).
|
|
Used by <stdlib.h> and <math.h> functions for overflow.
|
|
Copyright (C) 1992, 1995, 1996, 1997, 1999, 2000 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#ifndef _MATH_H
|
|
# error "Never use <bits/huge_val.h> directly; include <math.h> instead."
|
|
#endif
|
|
|
|
#include <features.h>
|
|
|
|
/* IEEE positive infinity (-HUGE_VAL is negative infinity). */
|
|
|
|
#if __GNUC_PREREQ(2,96)
|
|
# define HUGE_VAL (__extension__ 0x1.0p2047)
|
|
#else
|
|
# define __HUGE_VAL_bytes { 0, 0, 0, 0, 0, 0, 0xf0, 0x7f }
|
|
|
|
# define __huge_val_t union { unsigned char __c[8]; double __d; }
|
|
# ifdef __GNUC__
|
|
# define HUGE_VAL (__extension__ \
|
|
((__huge_val_t) { __c: __HUGE_VAL_bytes }).__d)
|
|
# else /* Not GCC. */
|
|
static __huge_val_t __huge_val = { __HUGE_VAL_bytes };
|
|
# define HUGE_VAL (__huge_val.__d)
|
|
# endif /* GCC. */
|
|
#endif /* GCC 2.95 */
|
|
|
|
|
|
/* ISO C99 extensions: (float) HUGE_VALF and (long double) HUGE_VALL. */
|
|
|
|
#ifdef __USE_ISOC99
|
|
|
|
# if __GNUC_PREREQ(2,96)
|
|
|
|
# define HUGE_VALF (__extension__ 0x1.0p255f)
|
|
# define HUGE_VALL (__extension__ 0x1.0p32767L)
|
|
|
|
# else
|
|
|
|
# define __HUGE_VALF_bytes { 0, 0, 0x80, 0x7f }
|
|
|
|
# define __huge_valf_t union { unsigned char __c[4]; float __f; }
|
|
# ifdef __GNUC__
|
|
# define HUGE_VALF (__extension__ \
|
|
((__huge_valf_t) { __c: __HUGE_VALF_bytes }).__f)
|
|
# else /* Not GCC. */
|
|
static __huge_valf_t __huge_valf = { __HUGE_VALF_bytes };
|
|
# define HUGE_VALF (__huge_valf.__f)
|
|
# endif /* GCC. */
|
|
|
|
|
|
# define __HUGE_VALL_bytes { 0, 0, 0, 0, 0, 0, 0, 0x80, 0xff, 0x7f, 0, 0 }
|
|
|
|
# define __huge_vall_t union { unsigned char __c[12]; long double __ld; }
|
|
# ifdef __GNUC__
|
|
# define HUGE_VALL (__extension__ \
|
|
((__huge_vall_t) { __c: __HUGE_VALL_bytes }).__ld)
|
|
# else /* Not GCC. */
|
|
static __huge_vall_t __huge_vall = { __HUGE_VALL_bytes };
|
|
# define HUGE_VALL (__huge_vall.__ld)
|
|
# endif /* GCC. */
|
|
|
|
# endif /* GCC 2.95 */
|
|
|
|
#endif /* __USE_ISOC99. */
|