[Libre-soc-dev] cray-style vector of 40 years setting VL=0 at runtime

Jacob Lifshay programmerjake at gmail.com
Tue Oct 4 01:07:53 BST 2022

On Mon, Oct 3, 2022 at 3:54 AM lkcl <luke.leighton at gmail.com> wrote:
> jacob i've started the review / audit process, we need to go through the ENTIRETY of SV and i do mean absolutely all of it if you want VL=1 on scalar reg usage. i cannot possibly or reasonably be expected to complete such a massive task on my own, you will need to help out (anyone else is also welcome). i began the review here:
> https://libre-soc.org/openpower/sv/svp64/discussion/

Made some edits/corrections, as well as added a motivation section
detailing how VL=1 override helps emulate 128-bit packed SIMD.


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