RFR(M): 8154736: enhancement of cmpxchg and copy_to_survivor for ppc64

[John Paul Adrian Glaubitz]

Hi!

On 04/24/2018 04:20 PM, Doerr, Martin wrote:
> I think 6% performance gain is really worth doing this change.

Quick question: Does this pose any assumptions on the instruction set baseline
on ppc64? I haven't build-tested this yet, but I want to avoid it doesn't break
on POWER5, for example, which is used in Debian's big-endian ppc64 port.

Thanks,
Adrian

-- 
  .''`.  John Paul Adrian Glaubitz
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`. `'   Freie Universitaet Berlin - glaubitz at physik.fu-berlin.de
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