enhancement of cmpxchg and copy_to_survivor for ppc64

[Andrew Haley]

On 05/19/2016 12:56 PM, David Holmes wrote:
> I will be shepherding 8155949 through the post FC process (once we know 
> what it is). If you can provide the Aarch64 code before that completes 
> then it can go in with the other changes under this bug. Otherwise it 
> will need a separate bug.

AArch64 code at http://cr.openjdk.java.net/~aph/8154736

Thanks,

Andrew.