Method and apparatus for prediction for fork and join...

Details Method and apparatus for prediction for fork and join... Method and apparatus for prediction for fork and join...

2007-02-20

2007-02-20

Treat, William M. (Department: 2181)

Electrical computers and digital processing systems: processing

Processing control

Branching

Reexamination Certificate

active

10731567

ABSTRACT:
A method and apparatus for enabling the speculative forking of a speculative thread is disclosed. In one embodiment, a speculative fork instruction is conditioned by the results of a fork predictor. The fork predictor may issue predictions as to whether or not a speculative thread would execute desirably. The fork predictor may be implemented as a modified branch predictor circuit, and may have execution history updates entered by a determination of whether or not the execution of a speculative thread was or would have been desirable.

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Intel Corporation, “Intel® Itanium® Architecture Software Developer's Manual—vol. 3: Instruction Set Reference”, Revision 2.1, Document No. 245319-004, pp. 16-29, Oct. 2002.

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