[8u] RFR: JDK-8253036: Support building the Zero assembler port on AArch64

[Aleksey Shipilev]

On 9/17/20 1:41 PM, Andrew Haley wrote:
> On 17/09/2020 12:35, Aleksey Shipilev wrote:
>   > On 9/17/20 12:49 PM, Aleksey Shipilev wrote:
>   >> But hey, those definitions are missing even in the head JDK!
>   >
>   > Ha-ha. Oops. I have somewhat of the fix here:
>   >     https://bugs.openjdk.java.net/browse/JDK-8253284
>   >
>   > ...that would have to trickle in separately.
> 
> OK. It doesn't seem right to me to enable AArch64/Zero in a update
> version if we know it's incorrect, and quite nastily so. But I don't
> mind if we can make sure that it gets fixed before it gets released.
> GCC has all the atomic builtins we need to get this right; I don't
> believe we need any platform-specific code at all.

Yeah, JDK-8253284 should trickle down as the usual backports until the Jan CPU. Reviews are 
appreciated there.

I think (thankfully) that most distros ship the aarch64-port 8u bits in their aarch64 distributions, 
and therefore are not directly affected.

-- 
Thanks,
-Aleksey