Microprocessor having register file

摘要

A microprocessor (1) is coupled to a memory (2), and includes an instruction pipeline (3) and a register file (4). The register file (4) includes an address read/write circuit (5), a plurality of frame address storing registers (6) coupled to the address read/write circuits (5), data read/write circuits (7) and (10), and register banks (8) of the same number as that of the frame address storing registers (6). The register banks (8) is coupled to the data read/write circuits (7) and (10), and all the register banks (8) are composed of the same number of registers (9). The instruction pipeline (3) is coupled to the register file (4) through a register designating bus (104), a data transfer bus (105), and an address transfer bus (106). The instruction pipeline (3) is also coupled to the memory (2) through a memory address bus (101) and an instruction supply bus (102), and the data read/write circuit (10) is coupled to the memory (2) through a data transfer bus (103). At the time of the context switching, the overhead required for the save/restore of the content stored in the register file can be reduced. $$