Methods and apparatus for recognizing a subroutine call

Details Methods and apparatus for recognizing a subroutine call Methods and apparatus for recognizing a subroutine call

2006-11-28

2008-10-28

Treat, William M (Department: 2181)

Electrical computers and digital processing systems: processing

Processing control

Branching

C712S242000

Reexamination Certificate

active

07444501

ABSTRACT:
An apparatus for recognizing a subroutine call is disclosed. The apparatus includes a circuit comprising a first input for receiving contents of a register, a second input for receiving a non-sequential change in program flow, and a third input for receiving the next sequential address after the non-sequential change in program flow. The circuit is configured to compare the next sequential address and the contents of the register to determine whether the non-sequential change in program flow is a subroutine call.

REFERENCES:
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patent: 6973563 (2005-12-01), Sander
patent: 2008/0059780 (2003-03-01), Stempel et al.
patent: 2003/0097549 (2003-05-01), Ukai et al.
patent: 2006/0253686 (2006-11-01), Suzuki

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