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Programmable device using fixed and configurable logic to implement floating-point rounding

  • US 9,348,795 B1
  • Filed: 07/03/2013
  • Issued: 05/24/2016
  • Est. Priority Date: 07/03/2013
  • Status: Active Grant
First Claim
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1. A configurable specialized processing block on an integrated circuit device, said configurable specialized processing block comprising:

  • a first floating-point arithmetic operator stage;

    a second floating-point arithmetic operator stage;

    configurable interconnect within said configurable specialized processing block for routing signals into and out of each of said first and second floating-point arithmetic operator stages; and

    fixed rounding circuitry for performing a partial rounding operation on output of said second floating-point arithmetic operator stage, said fixed rounding circuitry comprising a rounding condition detector and an overflow detector, said overflow detector comprising;

    a first AND-gate combining output mantissa bits of said second floating-point arithmetic operator stage, anda second AND-gate combining output of said first AND-gate and output of said rounding condition detector.

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