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-rw-r--r--sysdeps/m68k/huge_val.h92
1 files changed, 92 insertions, 0 deletions
diff --git a/sysdeps/m68k/huge_val.h b/sysdeps/m68k/huge_val.h
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+++ b/sysdeps/m68k/huge_val.h
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+/* `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 */