[Libre-soc-dev] Two recent papers I just came across about INVT_SQRT

Jacob Lifshay programmerjake at gmail.com
Sat Feb 27 00:12:12 GMT 2021

On Fri, Feb 26, 2021, 15:23 Cole Poirier <colepoirier at gmail.com> wrote:

> Hi All,
> I came across someone sharing these two papers about fast INVT_SQRT
> innovations just now. I'm not sure if they are relevant to us as it
> seems they are focussed on the software side (using fmac) not the
> hardware side but I could have misinterpreted.

idk, will look later. We may end up not using them due to using the
div/sqrt/rsqrt unit I wrote instead, or something else.

Are these worth adding
> to the resources page?

yes! they look interesting.

> Fast Calculation of Cube and Inverse Cube Roots Using a Magic
> Constant and Its Implementation on Microcontrollers
> https://res.mdpi.com/d_attachment/energies/energies-14-01058/article_deploy/energies-14-01058-v2.pdf
> Modified Fast Inverse Square Root and Square Root
> Approximation Algorithms: The Method of Switching
> Magic Constants
> https://res.mdpi.com/d_attachment/computation/computation-09-00021/article_deploy/computation-09-00021-v3.pdf


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