New endian.h design. All architectures now use a common file for the bulk

part.  Some ports can optimize the swap operations.  This also means the
general API is extended with swap16, swap32, htobe16, htobe32, betoh16,
betoh32, htole16, htole32, letoh16 and letoh32.

1 files changed, 30 insertions, 135 deletions

diff --git a/sys/arch/m68k/include/endian.h b/sys/arch/m68k/include/endian.h
index b9514134c68..c1963970b53 100644
--- a/sys/arch/m68k/include/endian.h
+++ b/sys/arch/m68k/include/endian.h
@@ -1,9 +1,7 @@
-/*	$OpenBSD: endian.h,v 1.8 1997/06/25 12:52:09 grr Exp $	*/
-/*	$NetBSD: endian.h,v 1.10 1996/10/13 02:59:55 christos Exp $	*/
+/*	$OpenBSD: endian.h,v 1.9 1997/11/09 23:05:09 niklas Exp $	*/
 
-/*
- * Copyright (c) 1987, 1991 Regents of the University of California.
- * All rights reserved.
+/*-
+ * Copyright (c) 1997 Niklas Hallqvist.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -15,148 +13,45 @@
  *    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 product includes software developed by Niklas Hallqvist.
+ * 4. The name of the author may not 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	7.7 (Berkeley) 4/3/91
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
  */
 
 #ifndef _M68K_ENDIAN_H_
 #define _M68K_ENDIAN_H_
 
-/*
- * Define the order of 32-bit words in 64-bit words.
- */
-#define _QUAD_HIGHWORD	0
-#define _QUAD_LOWWORD	1
-
-#ifndef _POSIX_SOURCE
-/*
- * 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 int32_t */
-
-#define	BYTE_ORDER	BIG_ENDIAN
-
-#include <sys/cdefs.h>
-
-typedef u_int32_t in_addr_t;
-typedef u_int16_t in_port_t;
-
-__BEGIN_DECLS
-#if 0
-/*
- * prototypes supplied for documentation purposes solely
- */
-u_int32_t	htobe32 __P((u_int32_t));
-u_int16_t	htobe16 __P((u_int16_t));
-u_int32_t	betoh32 __P((u_int32_t));
-u_int16_t	betoh16 __P((u_int16_t));
-
-u_int32_t	htole32 __P((u_int32_t));
-u_int16_t	htole16 __P((u_int16_t));
-u_int32_t	letoh32 __P((u_int32_t));
-u_int16_t	letoh16 __P((u_int16_t));
-
-u_int32_t	htonl __P((u_int32_t));
-u_int16_t	htons __P((u_int16_t));
-u_int32_t	ntohl __P((u_int32_t));
-u_int16_t	ntohs __P((u_int16_t));
-#endif
-__END_DECLS
-
 #ifdef __GNUC__
 
-#define	__byte_swap_int32_variable(x) \
-({ register u_int32_t __x = (x); \
-   __asm ("rorw #8, %0; swap %0; rorw #8, %0" \
-	: "=r" (__x) \
-	: "0" (__x)); \
-   __x; })
-
-#define	__byte_swap_int16_variable(x) \
-({ register u_int16_t __x = (x); \
-   __asm ("rorw #8, %0" \
-	: "=r" (__x) \
-	: "0" (__x)); \
-   __x; })
-
-#ifdef __OPTIMIZE__
+#define	__swap32md(x) ({ \
+    register u_int32_t __x = (x); \
+    __asm ("rorw #8, %0; swap %0; rorw #8, %0" : "=r" (__x) : "0" (__x)); \
+    __x; \
+})
 
-#define	__byte_swap_int32_constant(x) \
-	((((x) & 0xff000000) >> 24) | \
-	 (((x) & 0x00ff0000) >>  8) | \
-	 (((x) & 0x0000ff00) <<  8) | \
-	 (((x) & 0x000000ff) << 24))
-#define	__byte_swap_int16_constant(x) \
-	((((x) & 0xff00) >> 8) | \
-	 (((x) & 0x00ff) << 8))
-#define	__byte_swap_int32(x) \
-	(__builtin_constant_p((x)) ? \
-	 __byte_swap_int32_constant(x) : __byte_swap_int32_variable(x))
-#define	__byte_swap_int16(x) \
-	(__builtin_constant_p((x)) ? \
-	 __byte_swap_int16_constant(x) : __byte_swap_int16_variable(x))
+#define	__swap16md(x) ({ \
+    register u_int16_t __x = (x); \
+    __asm ("rorw #8, %0" : "=r" (__x) : "0" (__x)); \
+    __x; \
+})
 
-#else /* __OPTIMIZE__ */
+/* Tell sys/endian.h we have MD variants of the swap macros.  */
+#define MD_SWAP
 
-#define	__byte_swap_int32(x)	__byte_swap_int32_variable(x)
-#define	__byte_swap_int16(x)	__byte_swap_int16_variable(x)
-
-#endif /* __OPTIMIZE__ */
 #endif /* __GNUC__ */
 
-/*
- * Macros for big/little endian to host and vice versa.
- */
-#define	betoh32(x)	(x)
-#define	betoh16(x)	(x)
-#define	htobe32(x)	(x)
-#define	htobe16(x)	(x)
-
-#define	letoh32(x)	__byte_swap_int32(x)
-#define	letoh16(x)	__byte_swap_int16(x)
-#define	htole32(x)	__byte_swap_int32(x)
-#define	htole16(x)	__byte_swap_int16(x)
-
-/*
- * Macros for network/external number representation conversion.
- *
- * The way this works is that HTONS(x) modifies x and *can't* be used as
- * and rvalue i.e.  foo=HTONS(bar) is wrong.  Likewise x=htons(x) should
- * never be used where HTONS(x) will serve i.e. foo=htons(foo) is wrong.
- * Failing to observe these rule will result in code that appears to work
- * and probably does work, but generates gcc warnings on architectures
- * where the macros are used to optimize away an unneeded conversion.
- */
-#define	ntohl(x)	betoh32(x)
-#define	ntohs(x)	betoh16(x)
-#define	htonl(x)	htobe32(x)
-#define	htons(x)	htobe16(x)
-
-#define	NTOHL(x)	(void)(x)
-#define	NTOHS(x)	(void)(x)
-#define	HTONL(x)	(void)(x)
-#define	HTONS(x)	(void)(x)
-
-#endif /* _POSIX_SOURCE */
+#define BYTE_ORDER 4321
+#include <sys/endian.h>
 
 #endif /* _M68K_ENDIAN_H_ */