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authorPeter S. Mazinger <ps.m@gmx.net>2011-03-14 12:57:18 +0100
committerBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2012-06-15 14:00:24 +0200
commite03994a376b156bd0a7eeb3b00125ce92c4d2c1e (patch)
tree0301ddc253c20f6913b0ecdec5dc1d9ff9921ec9 /libc/sysdeps/linux/i386/bits
parentfe042eb8dfaa6851a969683ae235c27a12c95ed0 (diff)
huge_vall.h: add for i386,ia64,m68k,sparc
relevant only for gcc < 3.3 or non-gcc compiler Signed-off-by: Peter S. Mazinger <ps.m@gmx.net> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Diffstat (limited to 'libc/sysdeps/linux/i386/bits')
-rw-r--r--libc/sysdeps/linux/i386/bits/huge_vall.h43
1 files changed, 43 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/i386/bits/huge_vall.h b/libc/sysdeps/linux/i386/bits/huge_vall.h
new file mode 100644
index 000000000..0678c7cd3
--- /dev/null
+++ b/libc/sysdeps/linux/i386/bits/huge_vall.h
@@ -0,0 +1,43 @@
+/* `HUGE_VALL' constant for ix86 (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_vall.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)
+#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 */