[llvm] [RISCV] Support XSfmm LLVM IR and CodeGen (PR #143069)

[Brandon Wu via llvm-commits]

4vtomat wrote:

> > > Is there an ABI specification for this somewhere? For SME, we did a lot of work to ensure that operations involving the matrix tile work cleanly. Which... I guess you don't necessarily need to do all of that, but you probably want a spec that says something about it.
> > 
> > 
> > Did anything happen for this?
> 
> Ping

Sorry for late reply. We have a PR reviewing in our downstream, after settle down, we'll have a spec and PR publicly

https://github.com/llvm/llvm-project/pull/143069