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

[Jacob Lifshay]

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


Thanks,
Jacob