diff options
author | Felix Fietkau <nbd@openwrt.org> | 2013-02-13 15:35:19 +0400 |
---|---|---|
committer | Felix Fietkau <nbd@openwrt.org> | 2013-02-13 15:35:19 +0400 |
commit | d01922625d21f97fcab757d0299586178333f1e0 (patch) | |
tree | ab28465b07df67b6cdc4f3a5620d2f9da4ce208b /utils.h | |
parent | e5a40544ecfa87583bbac014faae7e217e4e64b9 (diff) |
utils: add little-endian swap helpers
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Diffstat (limited to 'utils.h')
-rw-r--r-- | utils.h | 47 |
1 files changed, 27 insertions, 20 deletions
@@ -77,17 +77,14 @@ void clock_gettime(int type, struct timespec *tv); #elif defined(__APPLE__) #include <machine/endian.h> #include <machine/byte_order.h> -#define bswap_16(x) OSSwapInt16(x) #define bswap_32(x) OSSwapInt32(x) #define bswap_64(x) OSSwapInt64(x) #elif defined(__FreeBSD__) #include <sys/endian.h> -#define bswap_16(x) bswap16(x) #define bswap_32(x) bswap32(x) #define bswap_64(x) bswap64(x) #else #include <machine/endian.h> -#define bswap_16(x) swap16(x) #define bswap_32(x) swap32(x) #define bswap_64(x) swap64(x) #endif @@ -102,33 +99,43 @@ void clock_gettime(int type, struct timespec *tv); #define __LITTLE_ENDIAN LITTLE_ENDIAN #endif -#if __BYTE_ORDER == __LITTLE_ENDIAN +#define __u_bswap16(x) ((uint16_t)((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8))) #if _GNUC_MIN_VER(4, 2) +#define __u_bswap32(x) __builtin_bswap32(x) +#define __u_bswap64(x) __builtin_bswap64(x) +#else +#define __u_bswap32(x) bswap_32(x) +#define __u_bswap64(x) bswap_64(x) +#endif -#define __bswap_constant_16(x) ((uint16_t)((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8))) +#if __BYTE_ORDER == __LITTLE_ENDIAN -#define cpu_to_be64(x) __builtin_bswap64(x) -#define cpu_to_be32(x) __builtin_bswap32(x) -#define cpu_to_be16(x) __bswap_constant_16((uint16_t) x) +#define cpu_to_be64(x) __u_bswap64(x) +#define cpu_to_be32(x) __u_bswap32(x) +#define cpu_to_be16(x) __u_bswap16((uint16_t) x) -#define be64_to_cpu(x) __builtin_bswap64(x) -#define be32_to_cpu(x) __builtin_bswap32(x) -#define be16_to_cpu(x) __bswap_constant_16((uint16_t) x) +#define be64_to_cpu(x) __u_bswap64(x) +#define be32_to_cpu(x) __u_bswap32(x) +#define be16_to_cpu(x) __u_bswap16((uint16_t) x) -#else /* __GNUC__ */ +#define cpu_to_le64(x) (x) +#define cpu_to_le32(x) (x) +#define cpu_to_le16(x) (x) -#define cpu_to_be64(x) bswap_64(x) -#define cpu_to_be32(x) bswap_32(x) -#define cpu_to_be16(x) bswap_16(x) +#define le64_to_cpu(x) (x) +#define le32_to_cpu(x) (x) +#define le16_to_cpu(x) (x) -#define be64_to_cpu(x) bswap_64(x) -#define be32_to_cpu(x) bswap_32(x) -#define be16_to_cpu(x) bswap_16(x) +#else /* __BYTE_ORDER == __LITTLE_ENDIAN */ -#endif /* __GNUC__ */ +#define cpu_to_le64(x) __u_bswap64(x) +#define cpu_to_le32(x) __u_bswap32(x) +#define cpu_to_le16(x) __u_bswap16((uint16_t) x) -#else /* __BYTE_ORDER == __LITTLE_ENDIAN */ +#define le64_to_cpu(x) __u_bswap64(x) +#define le32_to_cpu(x) __u_bswap32(x) +#define le16_to_cpu(x) __u_bswap16((uint16_t) x) #define cpu_to_be64(x) (x) #define cpu_to_be32(x) (x) |