NetBSD/sys/arch/pc532/include/byte_swap.h

82 lines
2.9 KiB
C

/* $NetBSD: byte_swap.h,v 1.2 2001/12/06 23:25:43 simonb Exp $ */
/*
* 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.
*
* @(#)endian.h 7.8 (Berkeley) 4/3/91
*/
#ifndef _PC532_BYTE_SWAP_H_
#define _PC532_BYTE_SWAP_H_
static __inline unsigned int
__byte_swap_long_variable(unsigned int x)
{
__asm ("rotw 8,%1; rotd 16,%1; rotw 8,%1" : "=r" (x) : "0" (x));
return (x);
}
static __inline unsigned short
__byte_swap_word_variable(unsigned short x)
{
__asm ("rotw 8,%1" : "=r" (x) : "0" (x));
return (x);
}
#ifdef __OPTIMIZE__
#define __byte_swap_long_constant(x) \
((((x) & 0xff000000) >> 24) | \
(((x) & 0x00ff0000) >> 8) | \
(((x) & 0x0000ff00) << 8) | \
(((x) & 0x000000ff) << 24))
#define __byte_swap_word_constant(x) \
((((x) & 0xff00) >> 8) | \
(((x) & 0x00ff) << 8))
#define __byte_swap_long(x) \
(__builtin_constant_p((x)) ? \
__byte_swap_long_constant(x) : __byte_swap_long_variable(x))
#define __byte_swap_word(x) \
(__builtin_constant_p((x)) ? \
__byte_swap_word_constant(x) : __byte_swap_word_variable(x))
#else /* __OPTIMIZE__ */
#define __byte_swap_long(x) __byte_swap_long_variable(x)
#define __byte_swap_word(x) __byte_swap_word_variable(x)
#endif /* __OPTIMIZE__ */
#endif /* _PC532_BYTE_SWAP_H_ */