On Mon, Jan 13, 2020 at 9:39 AM Jason Ekstrand <ja...@jlekstrand.net> wrote: > > On Mon, Jan 13, 2020 at 11:27 AM Luke Kenneth Casson Leighton <l...@lkcl.net> > wrote: >> jason i'd be interested to hear your thoughts on what jacob wrote, does it >> alleviate your concerns, (we're not designing hardware specifically around >> vec2/3/4, it simply has that capability). > > > Not at all. If you just want a SW renderer that runs on RISC-V, feel free to > write one. If you want to vectorize in hardware and actually get serious > performance out of it, I highly doubt his plan will work. That said, I > wasn't planning to work on it so none of this is my problem so you're welcome > to take or leave anything I say. :-)
So, since it may not have been clearly explained before, the GPU we're building has masked vectorization like most other GPUs, it just that it additionally supports the masked vectors' elements being 1 to 4 element subvectors. If it turns out that using subvectors makes the GPU slower, we can add a scalarization pass before the SIMT to vector translation, converting everything to using more conventional operations. Jacob _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
