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- #ifndef MTD_SWAB_H
- #define MTD_SWAB_H
- #include <endian.h>
- #define swab16(x) \
- ((uint16_t)( \
- (((uint16_t)(x) & (uint16_t)0x00ffU) << 8) | \
- (((uint16_t)(x) & (uint16_t)0xff00U) >> 8) ))
- #define swab32(x) \
- ((uint32_t)( \
- (((uint32_t)(x) & (uint32_t)0x000000ffUL) << 24) | \
- (((uint32_t)(x) & (uint32_t)0x0000ff00UL) << 8) | \
- (((uint32_t)(x) & (uint32_t)0x00ff0000UL) >> 8) | \
- (((uint32_t)(x) & (uint32_t)0xff000000UL) >> 24) ))
- #define swab64(x) \
- ((uint64_t)( \
- (((uint64_t)(x) & (uint64_t)0x00000000000000ffULL) << 56) | \
- (((uint64_t)(x) & (uint64_t)0x000000000000ff00ULL) << 40) | \
- (((uint64_t)(x) & (uint64_t)0x0000000000ff0000ULL) << 24) | \
- (((uint64_t)(x) & (uint64_t)0x00000000ff000000ULL) << 8) | \
- (((uint64_t)(x) & (uint64_t)0x000000ff00000000ULL) >> 8) | \
- (((uint64_t)(x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \
- (((uint64_t)(x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \
- (((uint64_t)(x) & (uint64_t)0xff00000000000000ULL) >> 56) ))
- #if __BYTE_ORDER == __BIG_ENDIAN
- #define cpu_to_le16(x) ({ uint16_t _x = x; swab16(_x); })
- #define cpu_to_le32(x) ({ uint32_t _x = x; swab32(_x); })
- #define cpu_to_le64(x) ({ uint64_t _x = x; swab64(_x); })
- #define cpu_to_be16(x) (x)
- #define cpu_to_be32(x) (x)
- #define cpu_to_be64(x) (x)
- #else
- #define cpu_to_le16(x) (x)
- #define cpu_to_le32(x) (x)
- #define cpu_to_le64(x) (x)
- #define cpu_to_be16(x) ({ uint16_t _x = x; swab16(_x); })
- #define cpu_to_be32(x) ({ uint32_t _x = x; swab32(_x); })
- #define cpu_to_be64(x) ({ uint64_t _x = x; swab64(_x); })
- #endif
- #define le16_to_cpu(x) cpu_to_le16(x)
- #define be16_to_cpu(x) cpu_to_be16(x)
- #define le32_to_cpu(x) cpu_to_le32(x)
- #define be32_to_cpu(x) cpu_to_be32(x)
- #define le64_to_cpu(x) cpu_to_le64(x)
- #define be64_to_cpu(x) cpu_to_be64(x)
- #endif
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