mirror of https://github.com/encounter/SDL.git
Use Clang/GCC builtins for SDL byteswapping functions
__builtin_bswap32/64 were introduced in GCC 4.3. __builtin_bswap16 was not available on x86 until GCC 4.8 due to a bug. __builtin_bswap32/64 were introduced in Clang 2.6. __builtin_bswap16 was introduced in Clang 3.2.
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@ -75,7 +75,10 @@ extern "C" {
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/**
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* \file SDL_endian.h
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*/
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#if defined(__GNUC__) && defined(__i386__) && \
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#if (defined(__clang__) && (__clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 2))) || \
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(defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)))
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#define SDL_Swap16(x) __builtin_bswap16(x)
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#elif defined(__GNUC__) && defined(__i386__) && \
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!(__GNUC__ == 2 && __GNUC_MINOR__ <= 95 /* broken gcc version */)
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SDL_FORCE_INLINE Uint16
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SDL_Swap16(Uint16 x)
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@ -130,7 +133,10 @@ SDL_Swap16(Uint16 x)
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}
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#endif
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#if defined(__GNUC__) && defined(__i386__) && \
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#if (defined(__clang__) && (__clang_major__ > 2 || (__clang_major__ == 2 && __clang_minor__ >= 6))) || \
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(defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)))
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#define SDL_Swap32(x) __builtin_bswap32(x)
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#elif defined(__GNUC__) && defined(__i386__) && \
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!(__GNUC__ == 2 && __GNUC_MINOR__ <= 95 /* broken gcc version */)
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SDL_FORCE_INLINE Uint32
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SDL_Swap32(Uint32 x)
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@ -197,7 +203,10 @@ SDL_Swap32(Uint32 x)
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}
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#endif
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#if defined(__GNUC__) && defined(__i386__) && \
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#if (defined(__clang__) && (__clang_major__ > 2 || (__clang_major__ == 2 && __clang_minor__ >= 6))) || \
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(defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)))
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#define SDL_Swap64(x) __builtin_bswap64(x)
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#elif defined(__GNUC__) && defined(__i386__) && \
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!(__GNUC__ == 2 && __GNUC_MINOR__ <= 95 /* broken gcc version */)
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SDL_FORCE_INLINE Uint64
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SDL_Swap64(Uint64 x)
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