On Wed, 31 Jan 2024 06:39:25 PST (-0800), stefanha@xxxxxxxxx wrote:
On Tue, 30 Jan 2024 at 14:40, Palmer Dabbelt <palmer@xxxxxxxxxxx> wrote:
On Mon, 15 Jan 2024 08:32:59 PST (-0800), stefanha@xxxxxxxxx wrote:
I'm not 100% sure this is a sane GSoC idea, as it's a bit open ended and
might have some tricky parts. That said it's tripping some people up
and as far as I know nobody's started looking at it, so I figrued I'd
write something up.
Hi Palmer,
Your idea has been added:
https://wiki.qemu.org/Google_Summer_of_Code_2024#RISC-V_Vector_TCG_Frontend_Optimization
I added links to the vector extension specification and the RISC-V TCG
frontend source code.
Please add concrete tasks (e.g. specific optimizations the intern
should implement and benchmark) by Feb 21st. Thank you!
OK. We've got a few examples starting to filter in, I'll keep updating
the bug until we get some nice concrete reproducers for slowdows of
decent vectorized code. Then I'll take a look and what's inside them,
with any luck it'll be simple to figure out which vector instructions
are commonly used and slow -- there's a bunch of stuff in the RVV
translation that doesn't map cleanly, so I'm guessing it'll be in there.
If that all goes smoothly then I think we should have a reasonably
actionable intern project, but LMK if you were thinking of something
else?
Stefan
