Patents by Inventor Stephane Rossignol

Stephane Rossignol 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).

  • Method and apparatus for manipulating vectored data
    Patent number: 6629115
    Abstract: A method and apparatus is disclosed for manipulating vectored data. The method includes shifting bits of packed data comprising M N-bit elements using a bit-level shift step followed by a byte-level shift step. A mask is generated and applied to the intermediate shifted result to produce the final result. A method is disclosed for conditionally transferring data from one general purpose register to another based on data in yet a third general purpose register.
    Type: Grant
    Filed: October 1, 1999
    Date of Patent: September 30, 2003
    Assignee: Hitachi, Ltd.
    Inventor: Stephane Rossignol
  • Method and apparatus for arithmetic operation on vectored data
    Patent number: 6574651
    Abstract: A method of multiplying 32-bit values includes decomposing each multiplicand into its 16-bit components. This approach leads to a processor core design which permits re-use of much of the logic in the multiplication unit. The multiplication unit includes a selector which can feed various-sized data formats to the same multiplier circuits. Multiple data transformation paths are provided and feed into a single compression circuit and a single configurable full adder circuit.
    Type: Grant
    Filed: October 1, 1999
    Date of Patent: June 3, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Jeffrey Cui, Stephane Rossignol, Lew G. Chua-Eoan