[Libre-soc-bugs] [Bug 352] virtual (dependency-tracked) regfile (cache) needed

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=352

Luke Kenneth Casson Leighton <lkcl at lkcl.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |programmerjake at gmail.com
    NLnet milestone|---                         |NLnet.2019.02
            Summary|virtual                     |virtual
                   |(dependency-tracked)        |(dependency-tracked)
                   |regfile needed              |regfile (cache) needed

--- Comment #1 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
http://lists.libre-soc.org/pipermail/libre-soc-dev/2020-October/001069.html

further discussion leading back, where we may need to introduce
register-renaming into the register cache.

the original scheme (comment #1) is the "green" matrix here:
https://libre-soc.org/3d_gpu/reorder_alias_bytemask_scheme.jpg

that green table has "real" registers as columns and "virtual" registers as
rows

however if we are to introduce register-renaming the tables become more complex
and would need to be thought through.  perhaps an actual L1 cache?  don't know.
 needs thought.

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