#ifndef BITOPS_H #define BITOPS_H #include #include #if !defined __BYTE_ORDER || !(__BYTE_ORDER == __LITTLE_ENDIAN) && !(__BYTE_ORDER == __BIG_ENDIAN) #error missing __BYTE_ORDER #endif /* * Byte swab macros (based on linux/byteorder/swab.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)(((uint64_t)(x) & (uint64_t)0x00000000000000ffULL) << 56) | \ (uint64_t)(((uint64_t)(x) & (uint64_t)0x000000000000ff00ULL) << 40) | \ (uint64_t)(((uint64_t)(x) & (uint64_t)0x0000000000ff0000ULL) << 24) | \ (uint64_t)(((uint64_t)(x) & (uint64_t)0x00000000ff000000ULL) << 8) | \ (uint64_t)(((uint64_t)(x) & (uint64_t)0x000000ff00000000ULL) >> 8) | \ (uint64_t)(((uint64_t)(x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \ (uint64_t)(((uint64_t)(x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \ (uint64_t)(((uint64_t)(x) & (uint64_t)0xff00000000000000ULL) >> 56) )) #if (__BYTE_ORDER == __BIG_ENDIAN) #define cpu_to_le16(x) swab16(x) #define cpu_to_le32(x) swab32(x) #define cpu_to_le64(x) swab64(x) #define cpu_to_be16(x) (x) #define cpu_to_be32(x) (x) #define cpu_to_be64(x) (x) #define le16_to_cpu(x) swab16(x) #define le32_to_cpu(x) swab32(x) #define le64_to_cpu(x) swab64(x) #define be16_to_cpu(x) (x) #define be32_to_cpu(x) (x) #define be64_to_cpu(x) (x) #else /* __BYTE_ORDER != __BIG_ENDIAN */ #define cpu_to_le16(x) (x) #define cpu_to_le32(x) (x) #define cpu_to_le64(x) (x) #define cpu_to_be16(x) swab16(x) #define cpu_to_be32(x) swab32(x) #define cpu_to_be64(x) swab64(x) #define le16_to_cpu(x) (x) #define le32_to_cpu(x) (x) #define le64_to_cpu(x) (x) #define be16_to_cpu(x) swab16(x) #define be32_to_cpu(x) swab32(x) #define be64_to_cpu(x) swab64(x) #endif /* __BYTE_ORDER */ #endif /* BITOPS_H */