That's for 64-bit; another good option for 64-bit is to just never
use
isel, it hardly ever buys you anything. It is much more useful on
the
(older) 32-bit cores that support it.
Why is it more useful on 32-bit? If you're referring to the
performance of specific cores rather than some architectural thing,
maybe that's true with some chips, but on the Freescale side I'd be
surprised if e5500 were much different from e500v2 in that regard.
Yes, I was talking about the older cores. I'd be surprised if ISEL is
often a win on e5500, but I don't really know. I forgot about that chip
to tell you the truth :-)
Segher
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