Dynamic multiple instruction stream multiple data multiple pipel

Details Dynamic multiple instruction stream multiple data multiple pipel Dynamic multiple instruction stream multiple data multiple pipel

1987-09-30

1990-04-10

Laroche, Eugene R.

Boots, shoes, and leggings

364200, 364736, G06F 738

Patent

active

049166522

ABSTRACT:
A dynamic multiple instruction stream, multiple data, multiple pipeline (MIMD) apparatus simultaneously executes more than one instruction associated with a multiple number of instruction streams utilizing multiple data associated with the multiple number of instruction streams in a multiple number of pipeline processors. Since instructions associated with a multiple number of instruction streams are being executed simultaneously by a multiple number of pipeline processors, a tracking mechanism is needed for keeping track of the pipe in which each instruction is executing. As a result, a dynamic history table maintains a record of the pipeline processor number in which each incoming instruction is executing, and other characteristics of the instruction. When a particular instruction is received, it is decoded and its type is determined. Each pipeline processor handles a certain category of instructions; the particular instruction is transmitted to the pipeline processor having its corresponding category. However, before transmission, the pipeline processor is checked for completion of its oldest instruction by consulting the dynamic history table. If the table indicates that the oldest instruction in the pipeline processor should complete, execution of the oldest instruction in such processor completes, leaving room for insertion of the particular instruction therein for execution. When the particular instruction is transmitted to its associated pipeline processor, information including the pipe number is stored in the dynamic history table for future reference.

REFERENCES:
patent: 3840861 (1974-10-01), Amdahl et al.
patent: 4390946 (1983-06-01), Lane
patent: 4594655 (1986-06-01), Hao et al.

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