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/* SPDX-License-Identifier: GPL-2.0 */
/**
* Author: Coly Li
*
* Cherry-picked from include/uapi/linux/swab.h of
* Linux kernel v5.3 source code.
*/
#include <linux/types.h>
#include <asm/swab.h>
#ifndef __BCH_BITWISE_H
#define __BCH_BITWISE_H
#if __BYTE_ORDER == __LITTLE_ENDIAN
#define BCH_LITTLE_ENDIAN_LOCAL 1
#else
#undef BCH_LITTLE_ENDIAN_LOCAL
#endif
#define __swab16(x) ((__u16)( \
(((__u16)(x) & (__u16)0x00ffU) << 8) | \
(((__u16)(x) & (__u16)0xff00U) >> 8)))
#define __swab32(x) ((__u32)( \
(((__u32)(x) & (__u32)0x000000ffUL) << 24) | \
(((__u32)(x) & (__u32)0x0000ff00UL) << 8) | \
(((__u32)(x) & (__u32)0x00ff0000UL) >> 8) | \
(((__u32)(x) & (__u32)0xff000000UL) >> 24)))
#define __swab64(x) ((__u64)( \
(((__u64)(x) & (__u64)0x00000000000000ffULL) << 56) | \
(((__u64)(x) & (__u64)0x000000000000ff00ULL) << 40) | \
(((__u64)(x) & (__u64)0x0000000000ff0000ULL) << 24) | \
(((__u64)(x) & (__u64)0x00000000ff000000ULL) << 8) | \
(((__u64)(x) & (__u64)0x000000ff00000000ULL) >> 8) | \
(((__u64)(x) & (__u64)0x0000ff0000000000ULL) >> 24) | \
(((__u64)(x) & (__u64)0x00ff000000000000ULL) >> 40) | \
(((__u64)(x) & (__u64)0xff00000000000000ULL) >> 56)))
#ifdef BCH_LITTLE_ENDIAN_LOCAL
/* For little endian*/
#define cpu_to_le16(val) ((__le16)(val))
#define cpu_to_le32(val) ((__le32)(val))
#define cpu_to_le64(val) ((__le64)(val))
#define le16_to_cpu(val) ((__le16)(val))
#define le32_to_cpu(val) ((__le32)(val))
#define le64_to_cpu(val) ((__le64)(val))
#else
/* For big endian */
#define cpu_to_le16(val) ((__be16)__swab16((__u16)(val)))
#define cpu_to_le32(val) ((__be32)__swab32((__u32)(val)))
#define cpu_to_le64(val) ((__be64)__swab64((__u64)(val)))
#define le16_to_cpu(val) ((__be16)__swab16((__u16)(val)))
#define le32_to_cpu(val) ((__be32)__swab32((__u32)(val)))
#define le64_to_cpu(val) ((__be64)__swab64((__u64)(val)))
#endif
#endif
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