[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 #162 from Jacob Lifshay <programmerjake at gmail.com> ---
(In reply to Alexandre Oliva from comment #160)
> comment 159, on branch insns, was unrelated to the ongoing discussion, FWIW
> 
> having the return-to-compressed override is bad IMHO
> 
> if one bit must prevail, it had better be one that gets the next insn
> decoded the same whether you got to the 10-bit in by falling-through or
> jumping to the 10-bit insn
> 
> this speaks against trapping, too, unless you want to trap because it's an
> unintended fallthrough.  yuck

It would trap due to an illegal combination, running the illegal instruction
handler.

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