Optimisation work on Zero for ARM

[Cambridge Software Labs]

Hi All,

I have been fairly quiet on this list for the past few months but I have been
beavering away optimising Zero for ARM.

I have put together a website describing the optimisation work I have done
(http://camswl.com/openjdk).

The optimisation includes a new 'Bytecode Interpreter Generator', which can
peephole up to 4 bytecodes in advance.

Some highlights:

3.7 X improvement on ECM
4.8 X improvement on EEMBC

Between 2.6 X and 3.3 X improvment opening a blank document in ThinkFree Office.
(2.6 X Word, 2.8 X XCel, 3.3 X PPT).

Binaries and source are available from the above link. I am working on
checking them into Ubuntu 9.10 (karmic) and hope to push the work back into
IcedTea and OpenJDK.

The binaries should work on any ARMV5TE or later platform. I have tested the
binaries on ARMV7 only so any feedback relating to other platforms would be
welcome.

Regards,
Ed