121 lines
3.6 KiB
C
121 lines
3.6 KiB
C
/*
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* Copyright (c) 1987, 1991 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)endian.h 7.8 (Berkeley) 4/3/91
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* $FreeBSD$
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*/
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#ifndef _MACHINE_ENDIAN_H_
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#define _MACHINE_ENDIAN_H_
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/*
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* Define the order of 32-bit words in 64-bit words.
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*/
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#define _QUAD_HIGHWORD 1
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#define _QUAD_LOWWORD 0
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#ifndef _POSIX_SOURCE
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/*
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* Definitions for byte order, according to byte significance from low
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* address to high.
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*/
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#define LITTLE_ENDIAN 1234 /* LSB first: i386, vax */
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#define BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */
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#define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */
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#define BYTE_ORDER LITTLE_ENDIAN
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#ifndef _KERNEL
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#include <sys/cdefs.h>
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#endif
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#include <machine/ansi.h>
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__BEGIN_DECLS
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__uint32_t htonl(__uint32_t);
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__uint16_t htons(__uint16_t);
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__uint32_t ntohl(__uint32_t);
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__uint16_t ntohs(__uint16_t);
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__END_DECLS
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#ifdef __GNUC__
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static __inline __uint32_t
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__uint16_swap_uint32(__uint32_t __x)
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{
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__asm ("rorl $16, %1" : "=r" (__x) : "0" (__x));
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return __x;
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}
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static __inline __uint32_t
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__uint8_swap_uint32(__uint32_t __x)
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{
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#if defined(_KERNEL) && (defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)) && !defined(I386_CPU)
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__asm ("bswap %0" : "=r" (__x) : "0" (__x));
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#else
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__asm ("xchgb %h1, %b1\n\t"
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"rorl $16, %1\n\t"
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"xchgb %h1, %b1"
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: "=q" (__x) : "0" (__x));
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#endif
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return __x;
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}
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static __inline __uint16_t
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__uint8_swap_uint16(__uint16_t __x)
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{
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__asm ("xchgb %h1, %b1" : "=q" (__x) : "0" (__x));
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return __x;
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}
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/*
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* Macros for network/external number representation conversion.
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*/
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#define ntohl __uint8_swap_uint32
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#define ntohs __uint8_swap_uint16
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#define htonl __uint8_swap_uint32
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#define htons __uint8_swap_uint16
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#endif /* __GNUC__ */
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#define NTOHL(x) ((x) = ntohl(x))
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#define NTOHS(x) ((x) = ntohs(x))
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#define HTONL(x) ((x) = htonl(x))
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#define HTONS(x) ((x) = htons(x))
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#endif /* ! _POSIX_SOURCE */
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#endif /* !_MACHINE_ENDIAN_H_ */
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