diff options
Diffstat (limited to 'sys/arch/powerpc/include/endian.h')
| -rw-r--r-- | sys/arch/powerpc/include/endian.h | 64 |
1 files changed, 30 insertions, 34 deletions
diff --git a/sys/arch/powerpc/include/endian.h b/sys/arch/powerpc/include/endian.h index b8e1eaaacc7..979a90f125d 100644 --- a/sys/arch/powerpc/include/endian.h +++ b/sys/arch/powerpc/include/endian.h @@ -1,11 +1,8 @@ -/* $OpenBSD: endian.h,v 1.7 1997/06/25 12:41:43 grr Exp $ */ -/* $NetBSD: endian.h,v 1.2 1996/10/13 03:16:41 christos Exp $ */ +/* $OpenBSD: endian.h,v 1.8 1997/10/13 10:53:43 pefo Exp $ */ -/*- - * Copyright (C) 1995 Wolfgang Solfrank. - * Copyright (C) 1995 TooLs GmbH. - * All rights reserved. - * +/* + * Copyright (c) 1997 Per Fogelstrom + * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: @@ -16,24 +13,27 @@ * 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 TooLs GmbH. - * 4. The name of TooLs GmbH may not be used to endorse or promote products + * This product includes software developed under OpenBSD by + * Per Fogelstrom, Opsycon AB, Sweden. + * 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 TOOLS GMBH ``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 TOOLS GMBH 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. + * 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 _PPC_ENDIAN_H_ -#define _PPC_ENDIAN_H_ +#ifndef _MACHINE_ENDIAN_H_ +#define _MACHINE_ENDIAN_H_ #ifndef _POSIX_SOURCE @@ -41,14 +41,13 @@ #define _QUAD_LOWWORD 1 /* - * Definitions for byte order, according to byte significance from low - * address to high. + * Byte order definition. Byte numbers given in increasing address order. */ -#define LITTLE_ENDIAN 1234 /* LSB first: i386, vax */ -#define BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */ +#define LITTLE_ENDIAN 1234 /* LSB first: i386, NS32K */ +#define BIG_ENDIAN 4321 /* MSB first: M68K */ #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */ -#define BYTE_ORDER BIG_ENDIAN /* for now */ +#define BYTE_ORDER BIG_ENDIAN #include <sys/cdefs.h> @@ -63,14 +62,11 @@ u_int16_t ntohs __P((u_int16_t)); __END_DECLS /* - * Macros for network/external number representation conversion. + * Macros for network/external number representation conversion where + * network/external is defined to be in BIG_ENDIAN byte order. * - * 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. + * *NOTE* That the macros are supposed to work on the arrgument (x) and + * thus should *NOT* be used in assignments such as 'foo=HTONS(bar)'. */ #if BYTE_ORDER == BIG_ENDIAN && !defined(lint) #define ntohl(x) (x) @@ -92,4 +88,4 @@ __END_DECLS #endif #endif /* _POSIX_SOURCE */ -#endif /* _PPC_ENDIAN_H_ */ +#endif /* _MACHINE_ENDIAN_H_ */ |