CONSTITUTING SYSTEM FOR VECTOR REGISTER

摘要

PURPOSE:To designate registers without decreasing the number of designatable registeres for each scalar unit and also to avoid the deterioration of the access throughput, by providing a means for dividing the bank of a vector register in response to the number of scalar units and to attain access from each dividing position. CONSTITUTION:The address positions of banks #0-#7 of a vector register VR20 are designated by the addresses set to address registers 230-237 respective ly. These addresses are supplied to the corresponding one of both registers 230 and 234 from an address input terminal 21 via a selector 22A or 22B. When the registers (#0-#3) of even numbers are designated, a bus is set at the left (L) of the selector 22A and the address on the terminal 21 is set to the register 230 and then shifted to registers 231-233. Thus access is given to a register (8 elements) of an even number among those set at the positions of banks (#0-#3). The access is also given to the registers of odd numbers in the same way by means of a bus set at the right (R).