Hello, On Mon, Feb 12, 2018 at 03:24:14PM +0200, Eitan Azriel wrote: > The signature of _mm_crc32_u64() is: > unsigned int64 _mm_crc32_u64 ( > unsigned __int64 crc, > unsigned __int64 v > ); > > Why does it return int64, and not uint32? Shouldn't it return a valid CRC32 > value? GCC uses int64 because that is what the ABI/API says it should do. Presumably it uses int64 for output because it does use it for input and there was the desire to use the same type everywhere. Segher
