[Libre-soc-isa] [Bug 213] SimpleV Standard writeup needed

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Mon Oct 26 09:24:30 GMT 2020


--- Comment #90 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---

jacob i updated this page to include a number of ideas: i will add a couple
more for completeness (such as adding a new predicate register type and
associated instructions)

i included what i *think* you might mean by the chunked mask idea, please do
review what i wrote.

i also did an implementation analysis: unfortunately, the change-over between
when the underlying scalar int reg switches from chunked-mask to actual integer
is... exceedingly complex, particularly when combined with the (necessary)
regfile cacheing / virtualisation.

as always though we need to be thorough in the comparative analysis and
complete and document all ideas.

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