[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 bugzilla-daemon at libre-soc.org
Mon Nov 23 13:46:12 GMT 2020


--- Comment #12 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
rrright.  nooow the VLE 64k pages being marked as such makes sense.

the alternative encoding is an implicit marker that completely separates
standard v3.0B ppc64le ABI code from VLE/Compressed/SVPrefix code, leaving the
opportunity to have data entirely LE.

calls from one to the other are not a problem and do not need a mode-switching
instruction because the *page bit* is that marker.

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