Branch instruction executing device for tracing branch instrumen

Details Branch instruction executing device for tracing branch instrumen Branch instruction executing device for tracing branch instrumen

1995-03-08

1998-02-03

Coleman, Eric

395704, G06F 900

Patent

active

057154406

ABSTRACT:
A branch instruction executing device, for sequentially executing instructions in a pipeline process, a) decodes a conditional branch instruction, b) provides a debug exceptional producing flag for indicating the existence of the execution of the debug routine by assuming the success of the condition without waiting for the result of the determination of the condition and c) corrects a content of the debug exception producing flag when the result of the actual determination is later obtained. The execution of the debug routine is canceled when the branch condition is later found not to be successful.

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Reducing the Branch Penalty in Pipelined Processors by David J. Lilja, IEEE, Jul. 1988, pp. 47-55.
IBM Technical Disclosure Bulletin, vol. 24, No. 7A, Dec., 1981, "Central Control Unti Branch Trace Mechanism", Bonifas et al, pp. 3503-3505.

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