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>

1 files changed, 49 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/sparc/bits/huge_vall.h b/libc/sysdeps/linux/sparc/bits/huge_vall.h
new file mode 100644
index 000000000..e4e2749a1
--- /dev/null
+++ b/libc/sysdeps/linux/sparc/bits/huge_vall.h
@@ -0,0 +1,49 @@
+/* `HUGE_VALL' constant for IEEE 754 machines (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())
+#else
+# include <bits/wordsize.h>
+# if __WORDSIZE == 32
+#  define HUGE_VALL	((long double) HUGE_VAL)
+# elif __GNUC_PREREQ(2,96)
+#   define HUGE_VALL	(__extension__ 0x1.0p32767L)
+# elif defined __GNUC__
+
+#   define HUGE_VALL \
+  (__extension__							 \
+   ((union { struct { unsigned long __h, __l; } __i; long double __d; }) \
+    { __i: { __h: 0x7fff000000000000UL, __l: 0 } }).__d)
+
+# else /* not GCC */
+
+typedef union { unsigned char __c[16]; long double __d; } __huge_vall_t;
+#  define __HUGE_VALL_bytes	{ 0x7f, 0xff, 0,0,0,0,0,0,0,0,0,0,0,0,0,0 }
+static __huge_vall_t __huge_vall = { __HUGE_VALL_bytes };
+#  define HUGE_VALL	(__huge_vall.__d)
+
+# endif /* GCC.  */
+#endif /* GCC 3.3.  */