Data processor

Abstract

Abstract PURPOSE: To reduce the memory capacity of a data processor which performs pipeline processing, by executing an operand by the same microinstruction in both register direct mode and memory reference mode. CONSTITUTION: Between an instruction setup unit 100 and an instruction execution unit 101, a register 300 for communication is provided and when an operand is supplied in register direct mode, the instruction setup unit 100 accesses a general register 114 to transfer and fetch selectively the contents of the register as the operand into the register 300 for communication in advance. When an addressing mode is a memory reference mode, the operand of this register 300 is read into the instruction execution unit 101. Therefore, a microprogram executing instructions is made common. COPYRIGHT: (C)1982,JPO&Japio

Inventors

• 👤 Hidekazu Matsumoto
• 👤 Tadaaki Bando

Bibliographic Details