Viewing file:  byteorder.h (1.46 KB) -rw-r--r--
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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1996, 99, 2003 by Ralf Baechle
*/
#ifndef _ASM_BYTEORDER_H
#define _ASM_BYTEORDER_H
#include <linux/compiler.h>
#include <asm/types.h>
#ifdef __GNUC__
#ifdef CONFIG_CPU_MIPSR2
static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 x)
{
__asm__(
" wsbh %0, %1 \n"
: "=r" (x)
: "r" (x));
return x;
}
#define __arch__swab16(x) ___arch__swab16(x)
static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
{
__asm__(
" wsbh %0, %1 \n"
" rotr %0, %0, 16 \n"
: "=r" (x)
: "r" (x));
return x;
}
#define __arch__swab32(x) ___arch__swab32(x)
#ifdef CONFIG_CPU_MIPS64_R2
static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 x)
{
__asm__(
" dsbh %0, %1 \n"
" dshd %0, %0 \n"
" drotr %0, %0, 32 \n"
: "=r" (x)
: "r" (x));
return x;
}
#define __arch__swab64(x) ___arch__swab64(x)
#endif /* CONFIG_CPU_MIPS64_R2 */
#endif /* CONFIG_CPU_MIPSR2 */
#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
# define __BYTEORDER_HAS_U64__
# define __SWAB_64_THRU_32__
#endif
#endif /* __GNUC__ */
#if defined(__MIPSEB__)
# include <linux/byteorder/big_endian.h>
#elif defined(__MIPSEL__)
# include <linux/byteorder/little_endian.h>
#else
# error "MIPS, but neither __MIPSEB__, nor __MIPSEL__???"
#endif
#endif /* _ASM_BYTEORDER_H */
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