From 62f62904cf2196c8593f31170a8df9b06e76e431 Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Wed, 30 May 2012 15:51:32 -0700 Subject: Use i386 bits/huge_vall.h for i386/x86-64 --- sysdeps/x86/bits/huge_vall.h | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 sysdeps/x86/bits/huge_vall.h (limited to 'sysdeps/x86/bits/huge_vall.h') diff --git a/sysdeps/x86/bits/huge_vall.h b/sysdeps/x86/bits/huge_vall.h new file mode 100644 index 0000000000..7e9c24d8a7 --- /dev/null +++ b/sysdeps/x86/bits/huge_vall.h @@ -0,0 +1,42 @@ +/* `HUGE_VALL' constant for ix86 (where it is infinity). + Used by and 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 + . */ + +#ifndef _MATH_H +# error "Never use directly; include instead." +#endif + +#if __GNUC_PREREQ(3,3) +# define HUGE_VALL (__builtin_huge_vall()) +#elif __GNUC_PREREQ(2,96) +# define HUGE_VALL (__extension__ 0x1.0p32767L) +#else + +# 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 */ -- cgit 1.4.1