Function swap_int64_128

tensorflow/core/lib/hash/hash.cc:223–229

}

inline void swap_int64_128(__m128i& input) {
  constexpr uint8_t mask_data[] = {7,  6,  5,  4,  3,  2,  1, 0,
                                   15, 14, 13, 12, 11, 10, 9, 8};
  const __m128i swapped =
      _mm_shuffle_epi8(input, _mm_loadu_si128((const __m128i*)mask_data));
  _mm_storeu_si128(&input, swapped);
}
    
inline void Hash64AVX_256_Impl(const char*& data, size_t& n, uint64& h,
                               const uint64& m, const int& r) {