RFR: 8300253: Introduce AArch64 nzcv accessors

Wed Jan 18 10:35:23 UTC 2023

On Wed, 18 Jan 2023 09:57:20 GMT, Andrew Haley <aph at openjdk.org> wrote:

>> The specific use case we have is here: https://github.com/openjdk/zgc/blob/c23bd9e059df2759adaa5d316ec7d269ef5154a6/src/hotspot/cpu/aarch64/gc/z/zBarrierSetAssembler_aarch64.cpp#L119
>
> OK, I'm not wild about checking in dead code, but if it's imminently needed, OK. Please add the instructions to  `test/hotspot/gtest/aarch64/aarch64-asmtest.py` so they get tested..

The bits for the instructions are correct. I presume there'll be a train of patches for ZGC generational to necessitate it.

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PR: https://git.openjdk.org/jdk/pull/12038