FPU-free Brotli?

[Rich Ercolani]

Hi all,

I've recently been experimenting with Brotli for compression and decompression inside various kernels, and the results so far have been interesting [1], but one thing I've been contemplating is trying to avoid having to use the FPU, since dropping the need for kernel_fpu_begin/end would be nice in Linux, for example.

Quickly searching, I can't find any obvious indication anyone else has gone down this rabbit hole.

Before I consider diving in further (since this is just for fun), is there some reason that I'm not seeing that a fixed-point implementation absolutely couldn't work here, or anyone who's experimented with this? 

Thanks!

- Rich

[1] - https://drive.google.com/file/d/1QQ-9iCbOQChxENWSVxZxt5HXwQ4RhJvq/view?usp=sharing was a quick sample of trying a snapshot of my homedir on various compression setups, for example. Not going to claim anything involved is the most optimized, of course...

[eus...@google.com]

Hello.

 We do have "no-FPU" in our plans... just don't have enough time to implement it. IIRC, some compression levels are already FPU-free. Others are somewhat easy to turn to FPU-free, except to q10 and q11.

 Thanks for your interest and research.

Best regards,

  Eugene.