m68k specific infinity values.

diff --git a/sysdeps/m68k/huge_val.h b/sysdeps/m68k/huge_val.h
new file mode 100644 (file)
index 0000000..c213958
--- /dev/null
+++ b/sysdeps/m68k/huge_val.h
@@ -0,0 +1,92 @@
+/* `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.  */
+
+
+/* ISO C 9X extensions: (float) HUGE_VALF and (long double) HUGE_VALL.  */
+
+#ifdef __USE_ISOC9X
+
+#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.  */
+
+
+/* Expression representing positive infinity.  Here it is the same as
+   HUGE_VALF.  */
+#define INFINITY       HUGE_VALF
+
+#endif /* __USE_ISOC9X.  */
+
+
+#endif    /* huge_val.h */