diff options
Diffstat (limited to 'src/core/bitmath_func.hpp')
| -rw-r--r-- | src/core/bitmath_func.hpp | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/core/bitmath_func.hpp b/src/core/bitmath_func.hpp index 6f9c35806..9042e6a7e 100644 --- a/src/core/bitmath_func.hpp +++ b/src/core/bitmath_func.hpp @@ -291,4 +291,34 @@ template<typename T> static inline T ROR(const T x, const uint8 n) for (i = 0; b != 0; i++, b >>= 1) \ if (b & 1) + +#if defined(__APPLE__) + /* Make endian swapping use Apple's macros to increase speed + * (since it will use hardware swapping if available). + * Even though they should return uint16 and uint32, we get + * warnings if we don't cast those (why?) */ + #define BSWAP32(x) ((uint32)Endian32_Swap(x)) + #define BSWAP16(x) ((uint16)Endian16_Swap(x)) +#else + /** + * Perform a 32 bits endianness bitswap on x. + * @param x the variable to bitswap + * @return the bitswapped value. + */ + static inline uint32 BSWAP32(uint32 x) + { + return ((x >> 24) & 0xFF) | ((x >> 8) & 0xFF00) | ((x << 8) & 0xFF0000) | ((x << 24) & 0xFF000000); + } + + /** + * Perform a 16 bits endianness bitswap on x. + * @param x the variable to bitswap + * @return the bitswapped value. + */ + static inline uint16 BSWAP16(uint16 x) + { + return (x >> 8) | (x << 8); + } +#endif /* __APPLE__ */ + #endif /* BITMATH_FUNC_HPP */ |