44 lines
1.6 KiB
C
44 lines
1.6 KiB
C
/* `HUGE_VALL' constant for m68k (where it is infinity).
|
|
Used by <stdlib.h> and <math.h> functions for overflow.
|
|
Copyright (C) 1992, 1995, 1996, 1997, 1999, 2000, 2004
|
|
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
|
|
|
|
#if __GNUC_PREREQ(3,3)
|
|
# define HUGE_VALL (__builtin_huge_vall ())
|
|
#elif __GNUC_PREREQ(2,96)
|
|
# define HUGE_VALL (__extension__ 0x1.0p32767L)
|
|
#elif defined__GNUC__
|
|
|
|
# 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[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 2.95. */
|