[11]RFR(S): 8201509: Zero : S390x (S390 and not _LP64) atomic_copy64 inline assembler is wrong.

[Aleksey Shipilev]

On 04/17/2018 05:46 PM, Chris Phillips wrote:
> Hi,
> 
> Please review this small but significant change to Zero only code
> related to S390 (31bit) Zero self-build failures.
> 
> Bug:    https://bugs.openjdk.java.net/browse/JDK-8201509
> webrev: http://cr.openjdk.java.net/~chrisphi/JDK-8201509/webrev.1

Looks okay to me.

In addition to discussion in the bug itself, it seems we can argue it should look similar to the
PPC32 && !__SPE__ block above. Which is does, as far as operands are concerned. But, are we sure
ld/std is enough to copy 64 bits on S390? I assume "d" is for double in those insns?

Thanks,
-Aleksey