Patents by Inventor Stephen F. Stuart

Stephen F. Stuart 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).

  • Code determination using half-adder based operand comparator
    Patent number: 4578750
    Abstract: Disclosed is a method and apparatus for predicting the condition code of a condition-code-setting instruction by comparing operands in a data processing system. An operand comparator includes one or more half-adders to predict carry outs at an early time. The comparator is used in a data processing system which is operative in response to instructions having operation codes for specifying operations to be executed. The instructions also have operand fields for identifying operands to be utilized in connection with executing the instructions.
    Type: Grant
    Filed: August 24, 1983
    Date of Patent: March 25, 1986
    Assignee: Amdahl Corporation
    Inventors: Gene M. Amdahl, Hsiao-Peng S. Lee, Stephen J. Rawlinson, Stephen F. Stuart