| /* 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 |