| /* `HUGE_VALL' constant for m68k (where it is infinity). |
| Used by <stdlib.h> and <math.h> functions for overflow. |
| Copyright (C) 1992-2014 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. */ |
