Electrical computers and digital processing systems: processing – Processing architecture – Superscalar
Patent
1998-01-20
2000-04-04
Coleman, Eric
Electrical computers and digital processing systems: processing
Processing architecture
Superscalar
712215, G06F 938
Patent
active
060473673
ABSTRACT:
A system and method for improving microprocessor computer system out of order support via register management with synchronization of multiple pipelines and providing for processing a sequential stream of instructions in a computer system having a first and a second processing element, each of the processing elements having its own state determined by a setting of its own general purpose and control registers. When at any point in the processing of said sequential stream of instructions by said first processing element it becomes beneficial to have the second processing element begin continued processing of the same sequential instruction stream then the first and second processing elements process the sequential stream of instructions and may be executing the very same instruction but only one of said processing elements is permitted to change the overall architectural state of said computer system which is determined by a combination of the states of said first and second processing elements. The second processor will have more pipeline stages than the first in order processor to feed the first processor and reduce the finite cache penalty and increase performance. The processing and storage of results of the second processor does not change the architectural state of the computer system. Results are stored in its gprs or its personal storage buffer. Resynchronization of states with a coprocessor occurs upon an invalid op, a stall or a computed specific benefit to processing with the coprocessor as a speculative coprocessor.
REFERENCES:
patent: 4574349 (1986-03-01), Rechtschaffen
patent: 4901233 (1990-02-01), Liptay
patent: 5559976 (1996-09-01), Song
patent: 5751981 (1998-05-01), Witt
Augspurger Lynn L.
Coleman Eric
International Business Machines - Corporation
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