The initial version of the shader using 96/192-bit math based on 32-bit uints is about 40% faster.
Not 100% tested yet, but it seems promising. I'll probably drop the 64-bit version. This will also make it easy to support K values up to 96-bit as well.

[url]https://github.com/mrh42/vtf/blob/main/tf32.comp[/url]

[QUOTE=mrh;630986]The initial version of the shader using 96/192-bit math based on 32-bit uints is about 40% faster.[/QUOTE]

So... Perhaps that then suggests that that is the best path.

Always ask for guidance, of course.

I tend to learn from others.