Using value speculation to break constraining dependencies...

Details Using value speculation to break constraining dependencies... Using value speculation to break constraining dependencies...

2007-02-27

2007-02-27

Zhen, Wei (Department: 2191)

Data processing: software development, installation, and managem

Software program development tool

Translation of code

C717S141000, C717S142000, C717S150000

Reexamination Certificate

active

10439910

ABSTRACT:
One embodiment of the present invention provides a system that uses value speculation to break constraining dependencies in loops. The system operates by first identifying a loop within a computer program, and then identifying a dependency on a long-latency operation within the loop that is likely to constrain execution of the loop. Next, the system breaks the dependency by modifying the loop to predict a value that will break the dependency, and then using the predicted value to speculatively execute subsequent loop instructions.

REFERENCES:
patent: 4825360 (1989-04-01), Knight, Jr.
patent: 5704053 (1997-12-01), Santhanam
patent: 6263428 (2001-07-01), Nonomura et al.
patent: 6675374 (2004-01-01), Pieper et al.
patent: 6928645 (2005-08-01), Wang et al.

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