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-rw-r--r--src/core/bitmath_func.hpp5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/core/bitmath_func.hpp b/src/core/bitmath_func.hpp
index 6abcdcb80..27168e821 100644
--- a/src/core/bitmath_func.hpp
+++ b/src/core/bitmath_func.hpp
@@ -318,7 +318,12 @@ static FORCEINLINE T ROR(const T x, const uint8 n)
*/
static FORCEINLINE uint32 BSWAP32(uint32 x)
{
+#if defined(__GNUC__) && ((__GNUC__ > 4) || ((__GNUC__ == 4) && __GNUC_MINOR__ >= 3))
+ /* GCC >= 4.3 provides a builtin, resulting in faster code */
+ return (uint32)__builtin_bswap32((int32)x);
+#else
return ((x >> 24) & 0xFF) | ((x >> 8) & 0xFF00) | ((x << 8) & 0xFF0000) | ((x << 24) & 0xFF000000);
+#endif /* defined(__GNUC__) */
}
/**