[Libre-soc-dev] bigint-presentation reg alloc and cranelift's reg alloc

[Jacob Lifshay]

On Tue, Jan 31, 2023, 12:03 Luke Kenneth Casson Leighton <lkcl at lkcl.net>
wrote:

> > chris fallin (main author of cranelift's register allocator) is back from
> > vacation and replied:
> >
> https://bytecodealliance.zulipchat.com/#narrow/stream/217117-cranelift/topic/register.20allocating.20the.20stack/near/324966247
>
> so i saw you mention that you have abandoned one codebase
> and begun another?


not quite, i'm still using most of the python code (everything but the
register allocator, which is just one file). explanation here:
https://git.libre-soc.org/?p=bigint-presentation-code.git;a=blob;f=register_allocator/README.md;h=8d17cde2b6395e0ca1091629120576c27c87d4d1;hb=HEAD

can you point me to the bugtracker
> task on which that has been mentioned?
>

no, since i didn't mention it on a bug tracker iirc, but the bug tracking
it is (needs a bunch of sub-task bugs for reg-alloc, toom-cook, integration
with isacaller, etc.)
https://bugs.libre-soc.org/show_bug.cgi?id=942

>
> you do know that what you are working on
> is not authorised for funding,


actually iirc it has since it's a subtask of the fast rsa modular
exponentiation task.

the reg alloc experimentation is also quite useful for figuring out how
SVP64 will be integrated into llvm, gcc, cranelift, etc.

Jacob