[Libre-soc-bugs] [Bug 863] AV opcode implementation, add to Decoder, CSV files

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=863

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

           What    |Removed                     |Added
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       The table of|red=3000                    |red=2500
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--- Comment #5 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
(In reply to Jacob Lifshay from comment #4)
> I fixed minu[.] to actually be unsigned:
> https://git.libre-soc.org/?p=openpower-isa.git;a=commitdiff;
> h=2f9891616d1a251bbb83b1ab29da7040258847ab

doh.

> i noticed absdu does signed comparison instead of unsigned, 

yes, that comes from VSX, although i must re-read the page,
despite there being a ">u" operator people do insist on using
the wrong one then saying "but read the english words", sigh.

> either that
> needs to be changed to unsigned (and probably renamed to absdiffu) or the
> name changed to absdiff (not absd since imho that would be interpreted as
> absolute value dword, not absolute difference).

need to keep mnemonics short.

> 
> i'm not sure which one you wanted, so i'll let you change it. imho we
> probably want both of them as separate instructions.

like it. absds. have to find space.  grev* needs to go, replace with grevlut.
really running out.

> also, imho the absadd* instructions should be renamed to addabsdiff* since
> they add the absolute differences, not take the absolute value of addition.

too long a mnemonic. abssadd absuadd. hmm

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