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Permute Unit and Method to Operate a Permute Unit

  • US 20080130871A1
  • Filed: 10/16/2007
  • Published: 06/05/2008
  • Est. Priority Date: 10/17/2006
  • Status: Active Grant
First Claim
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1. A permute unit comprising:

  • a permute logic and a crossbar working in cycles defined by clocking signals and generating one valid output vector (vo) per cycle by treating two parallel input vectors (va, vb) per cycle according to an adequate scheme, wherein the permute unit is double pumped by performing two inner cycles per outer cycle defined by the clocking signals, wherein in every first inner cycle first halves (va<

    0;

    63>

    , vb<

    0;

    63>

    ) of both input vectors (va, vb) are treated and in every second inner cycle second halves (va<

    64;

    127>

    , vb<

    64;

    127>

    ) of both input vectors (va, vb) are treated and wherein every second inner cycle a valid output vector (vo) is generated from the results of the treatments within the first and the second inner cycles.

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