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(svn r22898) -Codechange: use MSVC compiler intrinsics for byte swapping

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glx 2011-09-06 00:10:20 +00:00
parent 2981404793
commit 2c20738067
1 changed files with 4 additions and 0 deletions
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4
src/core/bitmath_func.hpp
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@ -355,6 +355,10 @@ static FORCEINLINE T ROR(const T x, const uint8 n)
* warnings if we don't cast those (why?) */
#define BSWAP32(x) ((uint32)Endian32_Swap(x))
#define BSWAP16(x) ((uint16)Endian16_Swap(x))
#elif defined(_MSC_VER)
/* MSVC has intrinsics for swapping, resulting in faster code */
#define BSWAP32(x) (_byteswap_ulong(x))
#define BSWAP16(x) (_byteswap_ushort(x))
#else
/**
* Perform a 32 bits endianness bitswap on x.