71 lines
2.5 KiB
C
71 lines
2.5 KiB
C
/* $NetBSD: byte_swap.h,v 1.5 2002/02/24 01:04:26 matt 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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#include <sys/types.h>
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static __inline uint32_t __attribute__((__unused__))
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__byte_swap_long_variable(uint32_t x)
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{
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uint32_t y;
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__asm __volatile(
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"rotl $-8, %1, %0 \n"
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"insv %0, $16, $8, %0 \n"
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"rotl $8, %1, %%r1 \n"
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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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return (y);
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}
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static __inline uint16_t __attribute__((__unused__))
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__byte_swap_word_variable(uint16_t x)
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{
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return (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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