Hi Lino, > On whether we expect a non-min Zvfofp8 with FMA or similar: I don't know > of any concrete plan. The only FP8 vector item in the RISC-V spec > database today is Zvfofp8min (RVS-3748, currently in Freeze), which is > conversion-only (FP8<->BF16 and FP32->FP8), and I don't see a fuller > Zvfofp8 proposed yet. That said, given the precedent of the minimal > extensions (e.g. Zfhmin / Zvfhmin alongside the full Zfh / Zvfh), it > seems plausible a fuller FP8 extension could follow later. > > That's my reasoning for the current approach. I'm happy for you and the > maintainers to take the mode question up at the patchwork call, and I'll > go with whatever you decide.
we discussed this today in the patchwork call and the consensus was that separate modes seem like the more future-proof approach. I would hope that some of the more involved parts of the approach will just disappear and make the new pieces more similar to what we already have. (The vsetvl part which tracks the altfmt mode is obviously still necessary). -- Regards Robin
