Android and compatibility with deprecated armv7 instructions

[Mark Brown]

On Fri, Jul 04, 2014 at 09:33:24PM +0200, Arnd Bergmann wrote:
> On Friday 04 July 2014 20:24:05 Mark Brown wrote:

> > Another question I think it's worth asking is what the use case for 32
> > bit mode is other than preexisting binaries - I guess there's a case for
> > smaller binaries giving better cache utilisation?

> If you wanted that, you'd probably run x32-mode (or whatever it gets called
> on ARM64), which I'd expect to also be more efficient ;-)

Well, indeed.

> Seriously, backwards-compatibility is the only reason I can think of
> really, but that doesn't /have/ to mean existing binaries; there is a large
> amount of source code that can readily be compiled to any CPU as long as
> it's little-endian 32-bit.

Sure, and even some more that only runs if it's big endian 32 bit.
Definitely relatively esoteric compared to Android though, at least for
ARM for the time being.
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