[Libre-soc-bugs] [Bug 671] convert spec pseudocode to use XLEN width

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=671

--- Comment #73 from Jacob Lifshay <programmerjake at gmail.com> ---
(In reply to dmitry.selyutin from comment #72)
> It seems I missed extsb and extsh routines. These must also be converted.
> Ideas on the semantics?

sign-extend/truncate the input from XLEN to 8/16 bits, then
sign-extend/truncate to XLEN

so extsb is the equivalent of C's:
return (xlen_t)(int8_t)input;

and extsh is:
return (xlen_t)(int16_t)input;

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