[Libre-soc-bugs] [Bug 684] XLEN-16 fails when XLEN=8

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=684

--- Comment #11 from Jacob Lifshay <programmerjake at gmail.com> ---
(In reply to Luke Kenneth Casson Leighton from comment #10)
> this one needs careful thought.  i cannot say i am happy with any
> options (including the XLTRUNC one), whatever is done
> though, we have to have good justification for it.

if we do add a XLTRUNC function, I think it should truncate/zero-extend to
XLEN, so XLTRUNC(UI) is valid for XLEN <, =, or > 16. perhaps we should instead
call it XLCASTU, and have a corresponding sign-extending/truncating XLCASTS
function.

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