/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* 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_SWAB_H
#define _ASM_SWAB_H
#include <linux/compiler.h>
#include <linux/types.h>
#define __SWAB_64_THRU_32__
#if !defined (__mips16) && \
((defined (__mips_isa_rev) && (__mips_isa_rev >= 2 )) || \
defined (_MIPS_ARCH_LOONGSON3A))
static inline __attribute_const__ __u16 __arch_swab16(__u16 x)
{
__asm__(
" .set push \n"
" .set arch=mips32r2 \n"
" wsbh %0, %1 \n"
" .set pop \n"
: "=r" (x)
: "r" (x));
return x;
}
#define __arch_swab16 __arch_swab16
static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
{
__asm__(
" .set push \n"
" .set arch=mips32r2 \n"
" wsbh %0, %1 \n"
" rotr %0, %0, 16 \n"
" .set pop \n"
: "=r" (x)
: "r" (x));
return x;
}
#define __arch_swab32 __arch_swab32
/*
* Having already checked for MIPS R2 , enable the optimized version for
* 64 - bit kernel on r2 CPUs .
*/
#ifdef __mips64
static inline __attribute_const__ __u64 __arch_swab64(__u64 x)
{
__asm__(
" .set push \n"
" .set arch=mips64r2 \n"
" dsbh %0, %1 \n"
" dshd %0, %0 \n"
" .set pop \n"
: "=r" (x)
: "r" (x));
return x;
}
#define __arch_swab64 __arch_swab64
#endif /* __mips64 */
#endif /* (not __mips16) and (MIPS R2 or newer or Loongson 3A) */
#endif /* _ASM_SWAB_H */
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(vorverarbeitet am 2026-10-03)
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