v_matmul 799 modules/hal/include/opencv2/hal/intrin_cpp.hpp inline v_float32x4 v_matmul(const v_float32x4& v, const v_float32x4& m0, v_matmul 289 modules/hal/include/opencv2/hal/intrin_neon.hpp inline v_float32x4 v_matmul(const v_float32x4& v, const v_float32x4& m0,