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| author | rubidium <rubidium@openttd.org> | 2007-12-25 13:28:09 +0000 |
|---|---|---|
| committer | rubidium <rubidium@openttd.org> | 2007-12-25 13:28:09 +0000 |
| commit | 851f19b341bd182c3f531ffe852963abb4b1737a (patch) | |
| tree | c1450dea7c233ea47c2c3cc45df7e9e2cc64c928 /src/core | |
| parent | 81bf9f8503c52974c232252a20d1b1528be66d58 (diff) | |
| download | openttd-851f19b341bd182c3f531ffe852963abb4b1737a.tar.xz | |
(svn r11694) -Codechange: move more endianness related stuff to endian_func.hpp.
Diffstat (limited to 'src/core')
| -rw-r--r-- | src/core/bitmath_func.hpp | 30 | ||||
| -rw-r--r-- | src/core/endian_func.hpp | 45 |
2 files changed, 74 insertions, 1 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 */ diff --git a/src/core/endian_func.hpp b/src/core/endian_func.hpp index 545e6b986..fa73f7f7e 100644 --- a/src/core/endian_func.hpp +++ b/src/core/endian_func.hpp @@ -5,6 +5,49 @@ #ifndef ENDIAN_FUNC_H #define ENDIAN_FUNC_H +#include "bitmath_func.hpp" + +#if defined(ARM) || defined(__arm__) || defined(__alpha__) + #define OTTD_ALIGNMENT +#endif + +/* Windows has always LITTLE_ENDIAN */ +#if defined(WIN32) || defined(__OS2__) || defined(WIN64) + #define TTD_LITTLE_ENDIAN +#elif !defined(TESTING) + /* Else include endian[target/host].h, which has the endian-type, autodetected by the Makefile */ + #if defined(STRGEN) + #include "/endian_host.h" + #else + #include "endian_target.h" + #endif +#endif /* WIN32 || __OS2__ || WIN64 */ + +/* Setup alignment and conversion macros */ +#if defined(TTD_BIG_ENDIAN) + #define TO_BE32X(x) (x) + #define FROM_BE32(x) (x) + #define TO_BE32(x) (x) + #define FROM_BE16(x) (x) + #define TO_BE16(x) (x) + #define TO_LE32X(x) BSWAP32(x) + static inline uint32 FROM_LE32(uint32 x) { return BSWAP32(x); } + static inline uint32 TO_LE32(uint32 x) { return BSWAP32(x); } + static inline uint16 FROM_LE16(uint16 x) { return BSWAP16(x); } + static inline uint16 TO_LE16(uint16 x) { return BSWAP16(x); } +#else + #define TO_BE32X(x) BSWAP32(x) + static inline uint32 FROM_BE32(uint32 x) { return BSWAP32(x); } + static inline uint32 TO_BE32(uint32 x) { return BSWAP32(x); } + static inline uint16 FROM_BE16(uint16 x) { return BSWAP16(x); } + static inline uint16 TO_BE16(uint16 x) { return BSWAP16(x); } + #define TO_LE32X(x) (x) + #define FROM_LE32(x) (x) + #define TO_LE32(x) (x) + #define FROM_LE16(x) (x) + #define TO_LE16(x) (x) +#endif /* TTD_BIG_ENDIAN */ + static inline uint16 ReadLE16Aligned(const void *x) { return FROM_LE16(*(const uint16*)x); @@ -19,4 +62,4 @@ static inline uint16 ReadLE16Unaligned(const void *x) #endif } -#endif /* ENDIAN_FUNC_H */ +#endif /* ENDIAN_FUNC_HPP */ |