#asahi-gpu on 2024-08-05 — irc logs at oftc.irclog.whitequark.org

2024-07-16 04:52 ChanServ changed the topic of #asahi-gpu to: Asahi Linux GPU development (no user support, NO binary reversing) | Keep things on topic | GitHub: https://alx.sh/g | Wiki: https://alx.sh/w | Logs: https://alx.sh/l/asahi-gpu

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12:21 <karolherbst> alyssa: sooo.. "ASAHI_MESA_DEBUG=compblit", when will that be the default? It fixes a bug with u_blitter I'm running into 🙃

12:22 <alyssa> karolherbst: probably never, it's broken on pro/max/ultra chips and we don't know why

12:22 <karolherbst> oh no

12:22 <j`ey> karolherbst: do you get u_blitter recursion errors?

12:22 <karolherbst> no, it's handling NaNs in a way I don't need it to handle

12:23 <j`ey> oh

12:23 <karolherbst> "0xffffffffffffffff vs. 0x7e007e007e007e00" those kind of issues

12:27 <karolherbst> guess I'll need to figure out what u_blitte is doing then...

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12:38 <alyssa> that is a good reminder to investigate what macos does for copies

12:38 <alyssa> because it's... weird and not possible to express as gl/vk

12:39 <karolherbst> besides that one, the only other known bug with the OpenCL CTS is fma being a little on the weird side and I haven't figured out what's wrong exactly there

12:39 <alyssa> oh i remember that one

12:39 <alyssa> opencl cts does a denormals are tiny check or something like that

12:40 <alyssa> and it constant folds differently than the gpu evaluates it

12:40 <alyssa> which is probably in spec but confuses the h*ck out of the cts

12:40 <karolherbst> ohhh...

12:40 <karolherbst> I see...

12:40 <alyssa> as for the nan thing

12:40 <karolherbst> meanwhile I've coded up a workaround for that 1Dbuffer failures: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30514

12:41 <alyssa> the w/a i had was casting float images to uint for copies (this works except for like rg11b10)

12:41 <karolherbst> mhhh

12:41 <alyssa> but that broke gl stuff and i don't remember why

12:41 <karolherbst> I was hoping for compblit, because that also fixes it :'(

12:42 <alyssa> compblit breaks other stuff (:

12:42 <alyssa> tbh i don't know why compblit works at all on m1

12:43 <alyssa> when it doesn't on m1 pro

12:43 <karolherbst> annoying

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12:43 <karolherbst> maybe something with last_block?

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12:44 <karolherbst> I wanted to look into non uniform work groups at some point on asahi anyway...

12:44 <karolherbst> so maybe when I'm doing that, I might run into issues there unless you use last_block for anything else

12:45 <karolherbst> pipe_grid_info::last_block I mean here

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12:53 <karolherbst> mhhh.. yeah, so the fma emulation works, but that's kinda expected, but that's a huge pile of lowering code

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13:08 <alyssa> wait what no don't fma emulate just fix the cts ;-;

13:10 <karolherbst> yeah...

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17:09 <alyssa> karolherbst: ok you nerdsniped me into rewriting the compblit path

17:09 <alyssa> i mean i need to for vulkan too but

17:09 <alyssa> check back in like a week

17:09 <karolherbst> 🙃

17:09 <karolherbst> I hope my hunch about last_block being the broken bit is right..

17:09 <karolherbst> or maybe it's something else

17:09 <karolherbst> you'll figure it out :D

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18:14 <alyssa> it's not that lol

18:15 <alyssa> it's fundamentally broken

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