[Libre-soc-isa] [Bug 973] an easy way to shift registers up and down is needed

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=973

--- Comment #5 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
(In reply to Jacob Lifshay from comment #4)
> turns out bigint divmod using knuth's algorithm d most likely needs dynamic
> svoffset too, 

use 1<<r3 predicate mask with a vector reg
or in Vertical-First use a scalar reg sv.xxxx.

those are the two main ways to do dynamic single-reg
targetting.

l.

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