[Libre-soc-isa] [Bug 933] prefix-code (like huffman code) decode/encode instructions

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Thu Sep 22 12:10:25 BST 2022


--- Comment #9 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
(In reply to Jacob Lifshay from comment #7)

> CR0.EQ is 1 iff no values were decoded, because RT=0 in that case.

i mean, are there any *non-standard* uses that would be useful?
such as setting some bits of CR0 from RT (CR0.EQ if RT=0) 
but then setting *other* bits if RS is changed, for example.
and setting CR.SO instead of XER

that way it becomes possible (if practical?) to do a vectorised
call and have a parallel-analysis (parallel batch of CRfs)


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