d846855da8
o In i386's <machine/endian.h>, macros have some advantages over inlines, so change some inlines to macros. o In i386's <machine/endian.h>, ungarbage collect word_swap_int() (previously __uint16_swap_uint32), it has some uses on i386's with PDP endianness. Submitted by: bde o Move a comment up in <machine/endian.h> that was accidentially moved down a few revisions ago. o Reenable userland's use of optimized inline-asm versions of byteorder(3) functions. o Fix ordering of prototypes vs. redefinition of byteorder(3) functions, so that the non-GCC (libc asm) case has proper prototypes. o Add proper prototypes for byteorder(3) functions in <sys/param.h>. o Prevent redundant duplicate prototypes by making use of the _BYTEORDER_PROTOTYPED define. o Move the bswap16(), bswap32(), bswap64() C functions into MD space for platforms in which asm versions don't exist. This significantly reduces the complexity of some things at the cost of duplicate code. Reviewed by: bde
95 lines
3.2 KiB
C
95 lines
3.2 KiB
C
/*-
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* Copyright (c) 1987, 1991, 1993
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* The Regents of the University of California. 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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* @(#)endian.h 8.1 (Berkeley) 6/10/93
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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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#include <machine/ansi.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 0
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#define _QUAD_LOWWORD 1
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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 BIG_ENDIAN
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#endif /* !_POSIX_SOURCE */
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#ifdef __GNUC__
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static __inline __uint16_t
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__bswap16(__uint16_t _x)
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{
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return ((_x >> 8) | ((_x << 8) & 0xff00));
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}
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static __inline __uint32_t
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__bswap32(__uint32_t _x)
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{
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return ((_x >> 24) | ((_x >> 8) & 0xff00) | ((_x << 8) & 0xff0000) |
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((_x << 24) & 0xff000000));
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}
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static __inline __uint64_t
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__bswap64(__uint64_t _x)
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{
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return ((_x >> 56) | ((_x >> 40) & 0xff00) | ((_x >> 24) & 0xff0000) |
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((_x >> 8) & 0xff000000) | ((_x << 8) & ((__uint64_t)0xff << 32)) |
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((_x << 24) & ((__uint64_t)0xff << 40)) |
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((_x << 40) & ((__uint64_t)0xff << 48)) | ((_x << 56)));
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}
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#endif /* __GNUC__ */
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#define __htonl(x) ((__uint32_t)(x))
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#define __htons(x) ((__uint16_t)(x))
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#define __ntohl(x) ((__uint32_t)(x))
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#define __ntohs(x) ((__uint16_t)(x))
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#endif /* !_MACHINE_ENDIAN_H_ */
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