/* 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 */