RFR: 8261072: AArch64: Fix MacroAssembler::get_thread convention

Fri Feb 12 11:58:38 UTC 2021

On Mon, 8 Feb 2021 10:25:19 GMT, Bernhard Urban-Forster <burban at openjdk.org> wrote:

>> Please review a fix in a special calling convention for aarch64_get_thread_helper for non-Linux platforms (windows/aarch64 for now). 
>> 
>> Preliminary review: https://mail.openjdk.java.net/pipermail/aarch64-port-dev/2021-January/011239.html
>
> Marked as reviewed by burban (Author).

Looks good, will make other non-linux platform work without the need to change this ever again

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PR: https://git.openjdk.java.net/jdk/pull/2451