Patents by Inventor Seiji Hirao

Seiji Hirao 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: 11010170
    Abstract: An arithmetic processing apparatus includes weight tables each configured to store weighting factors in one-to-one correspondence with indexes associated with instruction addresses, a first weight arithmetic unit configured to perform a first operation and a second operation based on the weighting factors retrieved from the weight tables in response to an instruction fetch address, the first operation producing a first value for branch prediction for the instruction fetch address, the second operation producing second values for future branch prediction, and a second weight arithmetic unit configured to perform, in parallel with the second operation, a third operation equivalent to the second operation based on the weighting factors retrieved from the weight tables in response to an address of a completed branch instruction, wherein the second values stored in the first weight arithmetic unit are replaced with the third values upon detection of a wrong branch prediction.
    Type: Grant
    Filed: August 9, 2019
    Date of Patent: May 18, 2021
    Assignee: FUJITSU LIMITED
    Inventors: Takashi Suzuki, Seiji Hirao
  • Patent number: 10922129
    Abstract: An operation processing device includes a first register unit including first registers configured to hold data to be used for an operation in an operation unit; a first selection unit that selects data held by a first register indicated by a read address signal; a second selection unit that selects, based on a bypass selection signal, data from a data group including the data selected by the first selection unit and data indicative of a result of the operation; a second register unit that outputs the data selected by the second selection unit to the operation unit; a timing adjustment unit that outputs the read address signal to the first selection unit; and a bypass control unit that stops an operation of the timing adjustment unit when generating the bypass selection signal indicative of a selection of data other than the data selected by the first selection unit.
    Type: Grant
    Filed: June 21, 2018
    Date of Patent: February 16, 2021
    Assignee: FUJITSU LIMITED
    Inventors: Seiji Hirao, Sota Sakashita
  • Publication number: 20200057644
    Abstract: An arithmetic processing apparatus includes weight tables each configured to store weighting factors in one-to-one correspondence with indexes associated with instruction addresses, a first weight arithmetic unit configured to perform a first operation and a second operation based on the weighting factors retrieved from the weight tables in response to an instruction fetch address, the first operation producing a first value for branch prediction for the instruction fetch address, the second operation producing second values for future branch prediction, and a second weight arithmetic unit configured to perform, in parallel with the second operation, a third operation equivalent to the second operation based on the weighting factors retrieved from the weight tables in response to an address of a completed branch instruction, wherein the second values stored in the first weight arithmetic unit are replaced with the third values upon detection of a wrong branch prediction.
    Type: Application
    Filed: August 9, 2019
    Publication date: February 20, 2020
    Applicant: FUJITSU LIMITED
    Inventors: Takashi Suzuki, Seiji HIRAO
  • Publication number: 20190004855
    Abstract: An operation processing device includes a first register unit including first registers configured to hold data to be used for an operation in an operation unit; a first selection unit that selects data held by a first register indicated by a read address signal; a second selection unit that selects, based on a bypass selection signal, data from a data group including the data selected by the first selection unit and data indicative of a result of the operation; a second register unit that outputs the data selected by the second selection unit to the operation unit; a timing adjustment unit that outputs the read address signal to the first selection unit; and a bypass control unit that stops an operation of the timing adjustment unit when generating the bypass selection signal indicative of a selection of data other than the data selected by the first selection unit.
    Type: Application
    Filed: June 21, 2018
    Publication date: January 3, 2019
    Applicant: FUJITSU LIMITED
    Inventor: Seiji HIRAO
  • Patent number: 3940325
    Abstract: Radiation-sterilized shaped articles of olefin polymers containing 0.01 - 0.5% by weight based on the weight of the olefin polymers, of octadecyl 3,5-di-t-butyl-4-hydroxyhydrocinnamate or/and tetrakis [(m methane.The radiation-sterilized shaped articles are colorless and still have practically acceptable physical properties (melt flow rate and percentage occurrence of cracking), in spite of the fact that they have been irradiated with high energy radiation.
    Type: Grant
    Filed: August 24, 1973
    Date of Patent: February 24, 1976
    Assignee: Chisso Corporation
    Inventor: Seiji Hirao