Patents by Inventor Jeffrey W. Calder

Jeffrey W. Calder 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).

  • Efficient implementation of branch intensive algorithms in VLIW and superscalar processors
    Patent number: 8019979
    Abstract: An apparatus for implementing branch intensive algorithms is disclosed. The apparatus includes a processor containing a plurality of ALUs and a plurality of result registers. Each result register has a guard input which allows the ALU to write a result to the register upon receipt of a selection signal at the guard input. A lookup table is dynamically programmed with logic to implement an upcoming branching portion of program code. Upon evaluation of the branch conditions of the branching portion of code, the lookup table outputs a selection signal for writing the correct results of the branching portion of code based on the evaluation of the branch condition statements and the truth table programmed into the lookup table to the result register.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: September 13, 2011
    Assignee: Sigma Designs, Inc.
    Inventors: Jeffrey W. Calder, Tong Sun
  • EFFICIENT IMPLEMENTATION OF BRANCH INTENSIVE ALGORITHMS IN VLIW AND SUPERSCALAR PROCESSORS
    Publication number: 20090070567
    Abstract: An apparatus for implementing branch intensive algorithms is disclosed. The apparatus includes a processor containing a plurality of ALUs and a plurality of result registers. Each result register has a guard input which allows the ALU to write a result to the register upon receipt of a selection signal at the guard input. A lookup table is dynamically programmed with logic to implement an upcoming branching portion of program code. Upon evaluation of the branch conditions of the branching portion of code, the lookup table outputs a selection signal for writing the correct results of the branching portion of code based on the evaluation of the branch condition statements and the truth table programmed into the lookup table to the result register.
    Type: Application
    Filed: September 12, 2007
    Publication date: March 12, 2009
    Inventors: Jeffrey W. Calder, Tong Sun