Re: FYI: No JIT on Windows 8 for ARM

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>
>
> LuaJIT has gotten both a single-number mode and a dual-number mode
> for some time, already. The dual-number mode is the default on ARM
> and PPC. Apparently that works out best on the consoles, too.
>
> In dual-number mode, numbers are internally kept as either
> integers or doubles. Conversions happen transparently and lazily,
> only when needed. As long as you're careful to stick with integral
> numbers only, it'll happily compute everything with integers.
>
> --Mike
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>
I don't recall we tested the dual-number mode, so I don't know if it works
on the consoles or what the performance would be like. Double arithmetic
isn't *that* slow on consoles, so I would hazard to guess the winner is
whichever mode incurs the least load-hit-stores.

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