8230392: Define AArch64 as MULTI_COPY_ATOMIC

[David Holmes]

Hi Andrew,

On 24/01/2020 2:47 am, Andrew Haley wrote:
> Hi,
> 
> On 1/21/20 10:58 PM, David Holmes wrote:
>> On 22/01/2020 3:12 am, Andrew Haley wrote:
>>> http://cr.openjdk.java.net/~aph/8230392/
>>>
>>> I tested this in a bunch of ways, including bootstrapping and jtreg, but
>>> I'm not sure anything really stress tests this. I expect it'll be fine.
>>>
>>> OK to commit?
>> You obviously missed my response on the other email thread regarding the
>> taskQueue code.
>>
> 
> http://cr.openjdk.java.net/~aph/8230392-2/
> 
> Better?

That seems fine to me.

This does make me wonder whether other lock-free code in the VM needs 
special handling for non-CPU_MULTI_COPY_ATOMIC ??

Thanks,
David

> Thanks,
>