Patents by Inventor Christopher B. Rockwood

Christopher B. Rockwood 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).

  • Circuit for preservation of sign information in operations for comparison of the absolute value of operands
    Patent number: 5053986
    Abstract: A circuit for preserving sign information in a computer system. The computer system is capable of comparing and operating on the absolute value of two operands utilizing a pipelined architecture. Sign information is preserved through the use of a first plurality of stages corresponding to stages of the pipeline for storing sign information of a first operand and a second plurality of stages corresponding to stages of the pipeline for storing sign information of a second operand. Sign information is piped through the first and second plurality of stages under common control with the control for the pipeline. Upon completion of the comparison operation, the sign information for the operands is available. Further, the sign information for the first and second operands are coupled as inputs to a multiplexor.
    Type: Grant
    Filed: February 21, 1990
    Date of Patent: October 1, 1991
    Assignee: Stardent Computer, Inc.
    Inventors: Agha Y. Ahsan, Christopher B. Rockwood