Patents by Inventor Gary R. Presley-Nelson

Gary R. Presley-Nelson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4594659
    Abstract: Method and apparatus for prefetching instructions for a pipelined central processor unit for a general purpose digital data processing system. A table is maintained for purposes of predicting the target addresses of transfer and indirect instructions based on past history of the execution of those instructions. The prefetch mechanism forms instruction addresses and fetches instructions in parallel with the execution of previously fetched instructions by a central execution pipeline unit of the central processor unit. As instructions are prefetched, the transfer and indirect prediction (TIP) table is checked to determine the past history of those instructions. If no transfers or indirects are found, the prefetch proceeds sequentially. If transfer or indirect instructions are found, then the prefetch uses information in the TIP table to begin fetching the target instruction(s).
    Type: Grant
    Filed: October 13, 1982
    Date of Patent: June 10, 1986
    Assignee: Honeywell Information Systems Inc.
    Inventors: Russell W. Guenthner, William A. Shelly, Gary R. Presley-Nelson, Kala J. Marietta, R. Morse Wade