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Improve performance of GF2p2_Multiply in AES package #35

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@MxAR MxAR commented Nov 2, 2023

This commit improves the implementation of the GF2p2_Multiply function in the AES package. The improved version of this function takes 12 instead of 14 cycles to execute. This improvement is significant, because this function gets called 480/672 times for every call to the AES-128/256 Cipher procedure.

This commit reimplements GF2p2_Multiply in a different way so that the
function now takes 12 instead of 14 cycles to execute. This improvement
is important, because this function gets called 480/672 times for every call
to the AES-128/256 Cipher procedure.
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