Initial import, 0.1 + pk 0.2.4-B1

1 files changed, 117 insertions, 0 deletions

diff --git a/sys/i386/include/endian.h b/sys/i386/include/endian.h
new file mode 100644
index 0000000..404bf49
--- /dev/null
+++ b/sys/i386/include/endian.h
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 1987, 1991 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)endian.h	7.8 (Berkeley) 4/3/91
+ *
+ * PATCHES MAGIC                LEVEL   PATCH THAT GOT US HERE
+ * --------------------         -----   ----------------------
+ * CURRENT PATCH LEVEL:         1       00093
+ * --------------------         -----   ----------------------
+ *
+ * 27 Feb 93    Charles Hannum		Better byte-swapping macros for
+ *					i386/i486.
+ */
+
+/*
+ * Definitions for byte order, according to byte significance from low
+ * address to high.
+ */
+#define	LITTLE_ENDIAN	1234	/* LSB first: i386, vax */
+#define	BIG_ENDIAN	4321	/* MSB first: 68000, ibm, net */
+#define	PDP_ENDIAN	3412	/* LSB first in word, MSW first in long */
+
+#define	BYTE_ORDER	LITTLE_ENDIAN
+
+#ifndef KERNEL
+#include <sys/cdefs.h>
+#endif
+
+#define __word_swap_long(x) \
+({ register u_long X = (x); \
+   asm ("rorl $16, %1" \
+	: "=r" (X) \
+	: "0" (X)); \
+   X; })
+#if __GNUC__ >= 2
+#define __byte_swap_long(x) \
+({ register u_long X = (x); \
+   asm ("xchgb %h1, %b1\n\trorl $16, %1\n\txchgb %h1, %b1" \
+	: "=q" (X) \
+	: "0" (X)); \
+   X; })
+#define __byte_swap_word(x) \
+({ register u_short X = (x); \
+   asm ("xchgb %h1, %b1" \
+	: "=q" (X) \
+	: "0" (X)); \
+   X; })
+#else /* __GNUC__ >= 2 */
+#define __byte_swap_long(x) \
+({ register u_long X = (x); \
+   asm ("rorw $8, %w1\n\trorl $16, %1\n\trorw $8, %w1" \
+	: "=r" (X) \
+	: "0" (X)); \
+   X; })
+#define __byte_swap_word(x) \
+({ register u_short X = (x); \
+   asm ("rorw $8, %w1" \
+	: "=r" (X) \
+	: "0" (X)); \
+   X; })
+#endif /* __GNUC__ >= 2 */
+
+/*
+ * Macros for network/external number representation conversion.
+ */
+#if BYTE_ORDER == BIG_ENDIAN && !defined(lint)
+#define	ntohl(x)	(x)
+#define	ntohs(x)	(x)
+#define	htonl(x)	(x)
+#define	htons(x)	(x)
+
+#define	NTOHL(x)	(x)
+#define	NTOHS(x)	(x)
+#define	HTONL(x)	(x)
+#define	HTONS(x)	(x)
+
+#else
+
+#define	ntohl	__byte_swap_long
+#define	ntohs	__byte_swap_word
+#define	htonl	__byte_swap_long
+#define	htons	__byte_swap_word
+
+#define	NTOHL(x)	(x) = ntohl((u_long)x)
+#define	NTOHS(x)	(x) = ntohs((u_short)x)
+#define	HTONL(x)	(x) = htonl((u_long)x)
+#define	HTONS(x)	(x) = htons((u_short)x)
+#endif