RFR: Add support for ARMv6 to ARM JIT

[Edward Nevill]

On Thu, Jan 22, 2015 at 11:57 AM, Andrew Haley <aph at redhat.com> wrote:

> On 01/22/2015 11:14 AM, Edward Nevill wrote:
> > On Thu, Jan 22, 2015 at 10:00 AM, Andrew Haley <aph at redhat.com> wrote:
> >
> >> So what is thumb2.cpp for?  I still don't get it.
> >
> > The idea was to minimise the change to reduce the risk of breaking
> > anything for distros. The migration from thumb2 JIT to arm JIT would
> > be done in 3 stages.
>
> This is a very different development model from what we use in
> IcedTea.  There are stable branches we use for releases and the
> development trunk for new code.  We don't need to keep old files
> around because we have everything under source control.
>
> IMO (and it is just my opinion) you should remove thumb2.cpp on the
> development trunk.  I have no opinion about whether thumb2 or ARM
> should be the default on systems which support both.  I'm guessing
> that thumb2 might be a slightly better choice, but I doubt that it
> will make any difference to most workloads.
>
>
OK. Maybe I was just being paranoid because it is a large change and I
didn't want to break anything.

If everyone is happy with this shall I remove thumb2.cpp, replace it with
arm32JIT.cpp. It will generate Thumb2 code by default on any processor that
has Thumb2, ARM 32 bit code otherwise.

All the best,
Ed.
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