[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 #7 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
i updated the wiki page.

what happens with these 3 instructions?

* 1 16 bit
* 2 32 bit
* 3 32 bit

byte 0    1    2    3
     2 HI32    1 16
     3 HI32    2 LO32
     ...       3 LO32

this would be reordered:

1 16 | 2 HI32 LO32 | 3 HI32 LO32

and then...  because the 1st one is 16bit it's processed and then you look at
HI32 and find that from the Major Opcode it's 32 bit

same for SV-P48

i think this will work just fine.

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