VECTOR MASK CONTROL SYSTEM

PURPOSE:To save useless decision on vector mask data and to make faster a vector operation by using a mask special control flag for the control of the operation in an information processor. CONSTITUTION:A vector mask data generating means consists of mask generating operand registers 1 and 2, a comparing circuit 3, a mask data register 4, an instruction word register 6 and a instruction decoder 7, and a mask special control flag setting means consists of mask special control flag setting part 5. When the mask special control flag is set by the mask special control flag setting means, the operation of a non-operation instruction is executed without referring to the vector mask data generated by the vector mask data generating means at the time of the execution of the vector instruction accompanied with the mask control. Thus, the useless decision on the vector mask data can be saved, and the vector operation can be made faster.