63 lines
2.5 KiB
C
63 lines
2.5 KiB
C
/* $NetBSD: byte_swap.h,v 1.1 1999/01/15 13:31:28 bouyer Exp $ */
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/*
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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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* @(#)endian.h 7.8 (Berkeley) 4/3/91
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*/
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#ifndef _VAX_BYTE_SWAP_H_
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#define _VAX_BYTE_SWAP_H_
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#define __byte_swap_long_variable(x) __extension__ \
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({ register u_int32_t __y, __x = (x); \
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\
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__asm ("rotl $-8, %1, %0; \
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insv %0, $16, $8, %0; \
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rotl $8, %1, r1; \
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movb r1, %0" \
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: "&=r" (__y) \
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: "r" (__x) \
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: "r1", "cc" ); \
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__y; })
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#define __byte_swap_word_variable(x) __extension__ \
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({ register u_int16_t __x = (x); \
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\
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(u_int16_t)(__x << 8 | __x >> 8); \
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})
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#define __byte_swap_long(x) __byte_swap_long_variable(x)
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#define __byte_swap_word(x) __byte_swap_word_variable(x)
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#endif /* _VAX_BYTE_SWAP_H_ */
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