[Libre-soc-dev] MVL unclear
Luke Kenneth Casson Leighton
lkcl at lkcl.net
Fri May 21 15:25:35 BST 2021
On Fri, May 21, 2021 at 3:11 PM Lauri Kasanen <cand at gmx.com> wrote:
> On Fri, 21 May 2021 14:17:17 +0100
> Luke Kenneth Casson Leighton <lkcl at lkcl.net> wrote:
> So the answer was yes afterall. It is only a loop optimization.
oh - yes, setvl inside the loop. so yes, absolutely critically essential
less instructions, particularly if one of those is a branch.
> architectures where the register file is further expanded. There should be
> some reserved must-currently-trap-if-set bits in setvl's encoding for that
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