| /* |
| * 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. |
| * |
| * from: @(#)endian.h 7.8 (Berkeley) 4/3/91 |
| * $Id: endian.h,v 1.2 2008/05/22 21:30:27 jjohnstn Exp $ |
| */ |
| |
| #ifndef _MACHINE_ENDIAN_H_ |
| #define _MACHINE_ENDIAN_H_ |
| |
| /* |
| * Define the order of 32-bit words in 64-bit words. |
| */ |
| #define _QUAD_HIGHWORD 1 |
| #define _QUAD_LOWWORD 0 |
| |
| /* |
| * Definitions for byte order, according to byte significance from low |
| * address to high. |
| */ |
| |
| #ifndef LITTLE_ENDIAN |
| #define LITTLE_ENDIAN 1234 /* LSB first: i386, vax */ |
| #endif |
| |
| #ifndef BIG_ENDIAN |
| #define BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */ |
| #endif |
| |
| #ifndef PDP_ENDIAN |
| #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */ |
| #endif |
| |
| #ifndef BYTE_ORDER |
| #define BYTE_ORDER LITTLE_ENDIAN |
| #endif |
| |
| #ifndef KERNEL |
| #include <sys/cdefs.h> |
| #endif |
| |
| #include <sys/types.h> |
| |
| __BEGIN_DECLS |
| unsigned long htonl __P((unsigned long)); |
| unsigned short htons __P((unsigned short)); |
| unsigned long ntohl __P((unsigned long)); |
| unsigned short ntohs __P((unsigned short)); |
| __END_DECLS |
| |
| #define __word_swap_long(x) \ |
| __extension__ ({ register u_long __X = (x); \ |
| __asm ("rorl $16, %1" \ |
| : "=r" (__X) \ |
| : "0" (__X)); \ |
| __X; }) |
| |
| #if defined(KERNEL) && (defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)) && !defined(I386_CPU) |
| |
| #define __byte_swap_long(x) \ |
| __extension__ ({ register u_long __X = (x); \ |
| __asm ("bswap %0" \ |
| : "=r" (__X) \ |
| : "0" (__X)); \ |
| __X; }) |
| #else |
| |
| #define __byte_swap_long(x) \ |
| __extension__ ({ register u_long __X = (x); \ |
| __asm ("xchgb %h1, %b1\n\trorl $16, %1\n\txchgb %h1, %b1" \ |
| : "=q" (__X) \ |
| : "0" (__X)); \ |
| __X; }) |
| #endif |
| |
| #define __byte_swap_word(x) \ |
| __extension__ ({ register u_short __X = (x); \ |
| __asm ("xchgb %h1, %b1" \ |
| : "=q" (__X) \ |
| : "0" (__X)); \ |
| __X; }) |
| |
| /* |
| * Macros for network/external number representation conversion. |
| */ |
| #ifdef __GNUC__ |
| #define ntohl __byte_swap_long |
| #define ntohs __byte_swap_word |
| #define htonl __byte_swap_long |
| #define htons __byte_swap_word |
| #endif |
| |
| #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 /* !_MACHINE_ENDIAN_H_ */ |