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| author | Rémi Verschelde <rverschelde@gmail.com> | 2019-03-06 00:58:30 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2019-03-06 00:58:30 +0100 |
| commit | dddf8c672b988da7a1a6b2bbe8b57462a3b5897a (patch) | |
| tree | 04f18cad3eb1d3221d2eaff01d7a405c3c718ab8 | |
| parent | b4d5c1ab5be236b3b2b9f6b3b5f3445a2285df72 (diff) | |
| parent | 64bce5a24bcf9c2d1ab1548c41a51626228583cc (diff) | |
Merge pull request #26668 from marxin/use-gcc-builtins-for-bswap
Use GCC builtins for bswap as compiler can then emit these via insn
| -rw-r--r-- | core/typedefs.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/core/typedefs.h b/core/typedefs.h index 966360d4f2..03514466c0 100644 --- a/core/typedefs.h +++ b/core/typedefs.h @@ -250,21 +250,34 @@ static inline int get_shift_from_power_of_2(unsigned int p_pixel) { } /** Swap 16 bits value for endianness */ +#if defined(__GNUC__) || _llvm_has_builtin(__builtin_bswap16) +#define BSWAP16(x) __builtin_bswap16(x) +#else static inline uint16_t BSWAP16(uint16_t x) { return (x >> 8) | (x << 8); } +#endif + /** Swap 32 bits value for endianness */ +#if defined(__GNUC__) || _llvm_has_builtin(__builtin_bswap32) +#define BSWAP32(x) __builtin_bswap32(x) +#else static inline uint32_t BSWAP32(uint32_t x) { return ((x << 24) | ((x << 8) & 0x00FF0000) | ((x >> 8) & 0x0000FF00) | (x >> 24)); } -/** Swap 64 bits value for endianness */ +#endif +/** Swap 64 bits value for endianness */ +#if defined(__GNUC__) || _llvm_has_builtin(__builtin_bswap64) +#define BSWAP64(x) __builtin_bswap64(x) +#else static inline uint64_t BSWAP64(uint64_t x) { x = (x & 0x00000000FFFFFFFF) << 32 | (x & 0xFFFFFFFF00000000) >> 32; x = (x & 0x0000FFFF0000FFFF) << 16 | (x & 0xFFFF0000FFFF0000) >> 16; x = (x & 0x00FF00FF00FF00FF) << 8 | (x & 0xFF00FF00FF00FF00) >> 8; return x; } +#endif /** When compiling with RTTI, we can add an "extra" * layer of safeness in many operations, so dynamic_cast |