Instruction fetching in data processing apparatus

Details Instruction fetching in data processing apparatus Instruction fetching in data processing apparatus

1987-04-02

1989-01-03

Zache, Raulfe B.

Boots, shoes, and leggings

G06F 938

Patent

active

047961759

ABSTRACT:
A microprocessor has a main memory, an instruction execution unit, and instruction queue for prefetching a series of instructions from the main memory, and an instruction cache. The instruction cache prefetches and stores an instruction next to those stored in the instruction queue by use of its address tag as an index when an amount of data fetched in the instruction queue is below a constant value. The fetching of the next instruction into the instruction queue from the instruction cache is achieved at the time to execute the same instruction again.

REFERENCES:
patent: 4008460 (1977-02-01), Bryant et al.
patent: 4562537 (1985-12-01), Barnett et al.
patent: 4691277 (1987-09-01), Kronstadt et al.

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