[Libre-soc-bugs] [Bug 238] POWER Compressed Formal Standard writeup

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=238

--- Comment #68 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
(In reply to Jacob Lifshay from comment #67)

> Except that BE instruction encoding is incompatible with the PowerPC64LE ABI
> which requires that instruction encoding is set to LE on call/return/unwind.

tck tck... thinks... does the dual halfword memory swapping similarly interfere
with ppc64le ABI? i would expect the answer to that to be yes.

the *instruction* encoding is required to be LE: what about data?

remember we are expecting that all code set to known-good state (mode) on
entry/exit (at the ABI points).

i would reaaally prefer that we not have to define a new ABI, it means
recompiling entire OS Distros.

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