Program counter age bits

Details Program counter age bits Program counter age bits

1995-08-23

1999-05-11

An, Meng-Ai T.

Electrical computers and digital processing systems: memory

Address formation

Combining two or more values to create address

711200, 39580001, G06F9/32

Patent

active

059039183

ABSTRACT:
An apparatus and method of efficiently and dynamically generating the addresses associated with a set of instructions in a microprocessor pipeline is disclosed. Program counter age bits associated with the offsets of an address of a predetermined instruction within a set of instructions are used to indicate the chronological age of each instruction within the set of instructions. The age bits are generated by a logic circuit which also dispatches instructions to various execution units. The age bits are used to maintain and track the addresses of an instruction stream within a processing system so that there is no need to store the addresses of each and every instruction.

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patent: 5592636 (1997-01-01), Popescu et al.
patent: 5797025 (1998-08-01), Popescu et al.

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