v_int64x2         717 modules/hal/include/opencv2/hal/intrin_cpp.hpp typedef v_reg<int64, 2> v_int64x2;
v_int64x2         212 modules/hal/include/opencv2/hal/intrin_neon.hpp struct v_int64x2
v_int64x2         213 modules/hal/include/opencv2/hal/intrin_sse.hpp struct v_int64x2