[Libre-soc-isa] [Bug 1061] change extsb/h/w definitions to scale input size with XLEN rather than convert from fixed sizes

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=1061

--- Comment #4 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
(In reply to Jacob Lifshay from comment #0)
> https://libre-soc.org/irclog/%23libre-soc.2023-04-18.log.html#t2023-04-
> this allows sign extending from 1/2/4-bit values while retaining the
> existing ability to sign extend from 8/16/32-bit values, all that changes is
> which of extsb/h/w you need to use for each case.

let me think about it. seems ok on initial glance.

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