Patent
1997-05-23
1998-10-06
Eng, David Y.
G06F 942
Patent
active
058190813
ABSTRACT:
A method of executing a branch instruction of jumping to a subroutine in a pipeline control system. The pipeline control system, which utilizes a data bus for instruction read operation and also for data read/write operation, performs at least one stage between an instruction fetching stage and an instruction executing stage. A branch instruction is fetched with a branch address fed through an address bus. The content of a first program counter is temporarily saved in a second program counter. The content of the first program counter is then updated with a new branch address. Following this, the content of the second program counter is saved in a computer memory for use as a return address.
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Eng David Y.
Frommer William S.
Sony Corporation
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