Data processor

Details Data processor Data processor

1997-12-23

1999-11-02

Eng, David Y.

Electrical computers and digital processing systems: processing

Processing control

Branching

G06F 938

Patent

active

059789042

ABSTRACT:
A data processor in accordance with the present invention makes it possible to perform pre-branch processing with respect to a return address in the initial stage of pipeline processing also on a subroutine return instruction, and therefore by providing a stack memory (PC stack) dedicated to a program counter (PC) for storing only return addresses of the subroutine return instruction, in executing a subroutine call instruction in an execution stage of a pipeline processing mechanism, the return address from the subroutine is pushed to the PC stack, and the pre-branch processing is performed to the address popped from the PC stack in decoding the subroutine return instruction in an instruction decoding stage.

REFERENCES:
patent: 4367524 (1983-01-01), Budde et al.
patent: 5193205 (1993-03-01), Matsuo et al.
patent: 5526498 (1996-06-01), Matsuo et al.
patent: 5701449 (1997-12-01), Matsuo et al.

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