[Libre-soc-isa] [Bug 529] scheme for supporting 16/48-bit instructions on PowerPC LE with full backward compatibility

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=529

--- Comment #2 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
(In reply to Jacob Lifshay from comment #0)
> Wasn't able to find the previous bug for this, so opening a new one.

thanks jacob.  i vaguely recall the discussion, i can't remember where.  on
seeing the explanation clearly laid out on comp.arch i think it's a really good
solution because it doesn't interfere or get confused with OpenPOWER LE/BE
mode.

i mean, it *is* LE/BE swapping, but at the 2x16-bit granularity level where
LE/BE is normally byte-level swapping.

i will add a stub wiki page for this, linked off of openpower/sv

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