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

[Craig Topper via llvm-commits]

topperc 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

@efriedma-quic here's the PR. https://github.com/llvm/llvm-project/pull/206260

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