m68k specific infinity values

1 files changed, 87 insertions, 0 deletions

diff --git a/sysdeps/m68k/huge_val.h b/sysdeps/m68k/huge_val.h
new file mode 100644
index 0000000000..4eeb30aaf6
--- /dev/null
+++ b/sysdeps/m68k/huge_val.h
@@ -0,0 +1,87 @@
+/* `HUGE_VAL' constants for m68k (where it is infinity).
+   Used by <stdlib.h> and <math.h> functions for overflow.
+   Copyright (C) 1992, 1995, 1996, 1997 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef	   _HUGE_VAL_H
+#define	   _HUGE_VAL_H	1
+
+#include <features.h>
+#include <sys/cdefs.h>
+#include <endian.h>
+
+/* IEEE positive infinity (-HUGE_VAL is negative infinity).  */
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+#define	__HUGE_VAL_bytes	{ 0x7f, 0xf0, 0, 0, 0, 0, 0, 0 }
+#endif
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define	__HUGE_VAL_bytes	{ 0, 0, 0, 0, 0, 0, 0xf0, 0x7f }
+#endif
+
+#define __huge_val_t	union { unsigned char __c[8]; double __d; }
+#ifdef	__GNUC__
+#define	HUGE_VAL	(__extension__ \
+			 ((__huge_val_t) { __c: __HUGE_VAL_bytes }).__d)
+#else	/* Not GCC.  */
+static __huge_val_t __huge_val = { __HUGE_VAL_bytes };
+#define	HUGE_VAL	(__huge_val.__d)
+#endif	/* GCC.  */
+
+
+/* GNU extensions: (float) HUGE_VALf and (long double) HUGE_VALl.  */
+
+#ifdef __USE_GNU
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+#define	__HUGE_VALf_bytes	{ 0x7f, 0x80, 0, 0 }
+#endif
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define	__HUGE_VALf_bytes	{ 0, 0, 0x80, 0x7f }
+#endif
+
+#define __huge_valf_t	union { unsigned char __c[4]; float __f; }
+#ifdef	__GNUC__
+#define	HUGE_VALf	(__extension__ \
+			 ((__huge_valf_t) { __c: __HUGE_VALf_bytes }).__f)
+#else	/* Not GCC.  */
+static __huge_valf_t __huge_valf = { __HUGE_VALf_bytes };
+#define	HUGE_VALf	(__huge_valf.__f)
+#endif	/* GCC.  */
+
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+#define	__HUGE_VALl_bytes	{ 0x7f, 0xff, 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
+#endif
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define	__HUGE_VALl_bytes	{ 0, 0, 0, 0, 0, 0, 0, 0x80, 0xff, 0x7f, 0, 0 }
+#endif
+
+#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	/* __USE_GNU.  */
+
+
+#endif	   /* huge_val.h */