is there an advanced solidity math library like prbmath that uses binary fixed point?

i assume binary is going to be slightly more efficient and something like Q128.128 would offer more precision 

abdk is good but only Q64.64
https://github.com/abdk-consulting/abdk-libraries-solidity/tree/master

cc @prberg

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I don't know any Q128.128 library. You might want to reach out to Mikhail.

Curious why do you need binary, though?

log/exponent math that doesn’t lose 18-decimal precision