53 lines
927 B
C
53 lines
927 B
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
|
/*
|
|
* Authors: Jun Yi <yijun@loongson.cn>
|
|
* Huacai Chen <chenhuacai@loongson.cn>
|
|
*
|
|
* Copyright (C) 2020-2021 Loongson Technology Corporation Limited
|
|
*/
|
|
#ifndef _ASM_SWAB_H
|
|
#define _ASM_SWAB_H
|
|
|
|
|
|
#include <linux/types.h>
|
|
|
|
#define __SWAB_64_THRU_32__
|
|
|
|
static __inline__ __u16 __arch_swab16(__u16 x)
|
|
{
|
|
__asm__(
|
|
" revb.2h %0, %1 \n"
|
|
: "=r" (x)
|
|
: "r" (x));
|
|
|
|
return x;
|
|
}
|
|
#define __arch_swab16 __arch_swab16
|
|
|
|
static __inline__ __u32 __arch_swab32(__u32 x)
|
|
{
|
|
__asm__(
|
|
" revb.2h %0, %1 \n"
|
|
" rotri.w %0, %0, 16 \n"
|
|
: "=r" (x)
|
|
: "r" (x));
|
|
|
|
return x;
|
|
}
|
|
#define __arch_swab32 __arch_swab32
|
|
|
|
#ifdef __loongarch64
|
|
static __inline__ __u64 __arch_swab64(__u64 x)
|
|
{
|
|
__asm__(
|
|
" revb.4h %0, %1 \n"
|
|
" revh.d %0, %0 \n"
|
|
: "=r" (x)
|
|
: "r" (x));
|
|
|
|
return x;
|
|
}
|
|
#define __arch_swab64 __arch_swab64
|
|
#endif /* __loongarch64 */
|
|
#endif /* _ASM_SWAB_H */
|