[aarch64-port-dev ] System.arraycopy() intrinsics

[Andrew Dinn]

On 23/09/13 20:36, Andrew Haley wrote:

>>> The arraycopy function should always be ARM code.  I'll grant
>>> you that it should not be an ExternalAddress -- that's just a
>>> mistake.

Ah, I think I should have read what you wrote here more carefully.

> I don't get it.  If you're calling a stub, it's either implemented as
> generated ARM code, in which case you can call it via BL, or it's
> native code, in which case you can't because BL won't reach.  Doing
> the code blob lookup doesn't hurt at all.

Ok, I see what you are saying now. The codeblob lookup allows you to use
a relative branch, avoiding having to load an absolute address. That
more than justifies any cost associated with doing the lookup. I will
drop my proposed changes and do the same as you in the C2 back end.

regards,


Andrew Dinn
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