Lossless compression using subnormal floating point values

    公开(公告)号:US11824564B1

    公开(公告)日:2023-11-21

    申请号:US17171608

    申请日:2021-02-09

    Applicant: Xilinx, Inc.

    CPC classification number: H03M7/24 G06F7/483

    Abstract: A disclosed compression method includes inputting a data set of floating point values from an input circuit to a compression circuit and detecting non-zero values and sequences of zero values in the data set. The compression circuit outputs, in response to detection of a non-zero value in the data set, the non-zero value to an output circuit. The compression circuit generates, in response to detection of a sequence of zero values in the data set, a subnormal floating point value having significand bits that indicate counted zero values in the sequence, and outputs the subnormal floating point value to the output circuit.

    Converting floating point data into integer data using a dynamically adjusted scale factor

    公开(公告)号:US11216275B1

    公开(公告)日:2022-01-04

    申请号:US16531971

    申请日:2019-08-05

    Applicant: XILINX, INC.

    Abstract: The embodiments herein describe a conversion engine that converts floating point data into integer data using a dynamic scaling factor. To select the scaling factor, the conversion engine compares a default (or initial) scaling factor value to an exponent portion of the floating point value to determine a shift value with which to bit shift a mantissa of the floating point value. After bit shifting the mantissa, the conversion engine determines whether the shift value caused an overflow or an underflow and whether that overflow or underflow violates a predefined policy. If the policy is violated, the conversion engine adjusts the scaling factor and restarts the conversion process. In this manner, the conversion engine can adjust the scaling factor until identifying a scaling factor that converts all the floating point values in the batch without violating the policy.

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