Information processing device capable of rapidly processing instructions of different groups

Abstract

Abstract In an information processing device comprising an instruction decoder (11), an instruction processing unit (12), and a memory unit (13), the instruction decoder (11) classifies a sequence of instructions into a first group for the instruction processing unit (12) and a second group for making the memory unit (13) cooperate with the instruction processing unit (12). The instructions of the first group are temporarily retained in an instruction stack register (36) before delivery to the instruction processing unit (12) while the instructions of the second group is directly delivered to the memory unit (13). A state indication unit (32) produces a plurality of flags representative of internal states of the instruction processing unit (12). A monitoring unit (42) monitors the instructions, the retained first-group instruction, and the flags to enable the instruction processing unit (12), the memory unit (13), and the instruction stack register (36) and to change the flags. The memory unit (13) can consecutively be accessed for loading the instruction processing unit (12) with data signals or for storage of data signals into the instruction processing unit (12) so as to make the same continuously run without superfluous interruption because the instructions of the second group are executed prior to execution of the first group.

Inventors

• 👤 Hideo NEC Corporation Hayashi

Bibliographic Details