Intel® C++ Compiler 16.0 User and Reference Guide
Any Ivec object can be assigned to any other Ivec object; conversion on assignment from one Ivec object to another is automatic.
Is16vec4 A;
Is8vec8 B;
I64vec1 C;
A = B; /* assign Is8vec8 to Is16vec4 */
B = C; /* assign I64vec1 to Is8vec8 */
B = A & C; /* assign M64 result of '&' to Is8vec8 */