[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

Luke Kenneth Casson Leighton <lkcl at lkcl.net> changed:

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--- Comment #9 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
(In reply to Jacob Lifshay from comment #8)

> if you don't want to use EXTSXL, the following should work:
> RT[0:XLEN-1] <- EXTS((RA)[XLEN*7/8:XLEN-1])

you misunderstand. for the purpose of precisely exactly
illustrating at the bit level precisely and exactly the
pseudocode i have written achieves its purpose as intended
for the demonstration of the concept of XLEN within this RFC.

any function *at all* destroys that purpose and intention to
EXPLICITLY show at the bitlevel what is going on.

no change shall occur to this pseudocode.

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