[PATCH v2 1/3] riscv: memcpy_noalignment: Make register allocation Zca-friendly

[Palmer Dabbelt]

On Mon, 15 Sep 2025 07:12:53 PDT (-0700), Carlos O'Donell wrote:
> On 9/3/25 5:45 AM, Yao Zihong wrote:
>> Tidy the temporary register allocation to favor registers eligible for
>> compressed encodings when Zca/Zcb are enabled, and to slightly shorten
>> live ranges. This keeps the ABI and clobber set unchanged and does not
>> alter control flow or memory access behavior.
>
> Palmer,
>
> Switching emails since your RIVOS email bounces, likely because you've
> changed employers.

Ya, I'm at Facebook now so my Rivos email won't work.  IIRC I just left 
<palmer@dabbelt.com> everywhere, but sorry if I missed something.  I'm 
also <palmerdabbelt@meta.com>, but we don't really use email internally 
and it's all outlook-ified so it'd be kind of useless for this kind of 
stuff (and I assume I'm <palmerdabbelt@fb.com>, but I have no idea where 
that one goes...).

> Are you still interested in reviewing RISC-V hardware enablement?

"interested" is kind of a specific word :).  TBH I havn't really been 
all that interested in most of the RISC-V extension stuff for a while 
now: without any exciting hardware around it just kind of seems like 
throwing time into a pit, particularly with the performance stuff where 
being hardware-driven is what interests me.  It's also not job-related 
any more, so I've got even less time to work on it.

That said, it does need to get done so unless anyone else wants to do it 
I'll try and keep looking.  I'm adding Jeff, Vineet, and Peter as 
they've expressed some interest in glibc stuff (and we've also got a 
handful of other port maintainers around, who are obviously welcome to 
pick stuff up if they're interested).  These pings help a ton, IRC is 
good too.  I think I can't make the pathcwork meetings, at 6am I'm 
usually on baby duty...