Method and apparatus for atomically changing selected bits...

Details Method and apparatus for atomically changing selected bits... Method and apparatus for atomically changing selected bits...

2005-06-14

2005-06-14

Ray, Gopal C. (Department: 2111)

Electrical computers and digital data processing systems: input/

Access locking

C713S100000

Reexamination Certificate

active

06907484

ABSTRACT:
One embodiment of the present invention provides a system that facilitates atomically updating selected bits within a register in a computing system. During operation, the system receives a command to update selected bits within the register. This command includes a data word and a control bit pattern. Next, the system examines the control bit pattern to determine an operation to be performed on the register. The system then performs the operation, which involves using the dataword to modify a content of the register atomically, without blocking subsequent commands to update the register.

REFERENCES:
patent: 4019033 (1977-04-01), Parmet
patent: 4261035 (1981-04-01), Raymond
patent: 4839642 (1989-06-01), Batz et al.
patent: 5625580 (1997-04-01), Read et al.
patent: 6738892 (2004-05-01), Coon et al.
“A core generator for fully synthesizable and highly parameterizable RISC-cores for system-on-chip designs” by Berekovic, M.; Heistermann, D.; Pirsch, P. (abstract only) Publication Date: Oct. 8-10, 1998.

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