ChanServ changed the topic of #panfrost to: Panfrost - FLOSS Mali Midgard + Bifrost + Valhall - Logs https://oftc.irclog.whitequark.org/panfrost - I don't know anything about WSI. That's my story and I'm sticking to it.
<alyssa>
q4a: America/Toronto
<alyssa>
aka America/New_York
<alyssa>
it's 19:51 here now
<alyssa>
FADD_IMM.v4f8 wouldn't make sense, since there are no 8-bit floats
<alyssa>
(well, you can *define* 8-bit floats but they're not very useful)
<HdkR>
I'm sure some AI researchers will eventually find a niche use case for bfloat8 or something :D
<alyssa>
Heh, there *exist* use cases
<alyssa>
they're just... obscure
<HdkR>
I do enjoy the 8-bit encoded floats that ARM sticks in its ISA
<alyssa>
Apple too
<alyssa>
instead of a lookup table of small constants, you get 8-bit integers for integer sources and 8-bit floats for float sources
<alyssa>
which covers most the common cases in practice
<alyssa>
0.0, 1.0, 2.0, 0.5, 0.25 and so on
<alyssa>
it doesn't get you stuff like pi and sqrt(2) which the lookup table approach does, though
<HdkR>
Is the 8-bit float encoding the same as the ARM one?
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<alyssa>
HdkR: Don't remember
<alyssa>
mesa/src/asahi/compiler/agx_minifloat.h if you're curious