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/* `HUGE_VAL' constants for m68k (where it is infinity).
Used by <stdlib.h> and <math.h> functions for overflow.
Copyright (C) 1992, 1995, 1996, 1997, 1999 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. 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>
#include <sys/cdefs.h>
/* IEEE positive infinity (-HUGE_VAL is negative infinity). */
#ifdef __GNUC__
# if __GNUC_PREREQ(2,95)
# define HUGE_VAL (0x1.0p2047)
# else
# define HUGE_VAL \
(__extension__ \
((union { unsigned long long __l; double __d; }) \
{ __l: 0x7ff0000000000000ULL }).__d)
# endif
#else /* not GCC */
static union { unsigned char __c[8]; double __d; } __huge_val =
{ { 0x7f, 0xf0, 0, 0, 0, 0, 0, 0 } };
# define HUGE_VAL (__huge_val.__d)
#endif /* GCC. */
/* ISO C 9X extensions: (float) HUGE_VALF and (long double) HUGE_VALL. */
#ifdef __USE_ISOC9X
# if __GNUC_PREREQ(2,95)
# define HUGE_VALF (0x1.0p255f)
# define HUGE_VALL (0x1.0p32767L)
# else
# ifdef __GNUC__
# define HUGE_VALF \
(__extension__ \
((union { unsigned long __l; float __f; }) \
{ __l: 0x7f800000UL }).__f)
# define HUGE_VALL \
(__extension__ \
((union { unsigned long __l[3]; long double __ld; }) \
{ __l: { 0x7fff0000UL, 0x80000000UL, 0UL } }).__ld)
# else /* not GCC */
static union { unsigned char __c[4]; float __f; } __huge_valf =
{ { 0x7f, 0x80, 0, 0 } };
# define HUGE_VALF (__huge_valf.__f)
static union { unsigned char __c[12]; long double __ld; } __huge_vall =
{ { 0x7f, 0xff, 0, 0, 0x80, 0, 0, 0, 0, 0, 0, 0 } };
# define HUGE_VALL (__huge_vall.__ld)
# endif /* GCC. */
# endif /* GCC 2.95. */
#endif /* __USE_ISOC9X. */
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