General-purpose register file optimized for intraprocedural regi

Details General-purpose register file optimized for intraprocedural regi General-purpose register file optimized for intraprocedural regi

1985-08-30

1988-10-11

Heckler, Thomas M.

Boots, shoes, and leggings

G06F 934

Patent

active

047775882

ABSTRACT:
A high speed register file for use by an instruction processor suitable for reduced instruction-set computers (RISCs) is disclosed which is preferably used with an efficient register allocation method. The register file facilitates the passing of parameters between procedures by dynamically providing overlapping registers which are accessible to both procedures. Each procedure also has a set of "local" registers assigned to it which are inaccessible from other procedures. The register file is divided into a number of blocks and a protection register stores a word which proscribes access by a particular procedure or task to certain blocks. In this manner, an instruction processor using the register file can operate on multiple tasks maintaining the integrity of each from undesired changes occuring in the others.

REFERENCES:
patent: 3461433 (1969-08-01), Emerson
patent: 4037214 (1977-07-01), Birner et al.
IEEE Computer, Sep. 1982, article by Patterson and Sequin entitled "A VLSI RISC", pp. 8-18.

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