On 07.10.2013 16:02, Erik Faye-Lund wrote:
> So the question is really how the hardware treats writes to
> non-existent registers. My guess would be that they are simply not
> recorded, and if that's the case it doesn't matter what we do. And
> doing an unconditional AND is faster than doing a bit-test followed by
> a conditional branch.

Hardware ignores writes to non-existent registers. Sometimes
non-existent registers are taken into use in future versions, though.

Terje
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