diff options
Diffstat (limited to 'ports/sysdeps/m68k/m680x0/bits/huge_vall.h')
| -rw-r--r-- | ports/sysdeps/m68k/m680x0/bits/huge_vall.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/ports/sysdeps/m68k/m680x0/bits/huge_vall.h b/ports/sysdeps/m68k/m680x0/bits/huge_vall.h new file mode 100644 index 0000000000..fc7371b5db --- /dev/null +++ b/ports/sysdeps/m68k/m680x0/bits/huge_vall.h @@ -0,0 +1,42 @@ +/* `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, see + <http://www.gnu.org/licenses/>. */ + +#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. */ |