RFR: 8369207: _Copy_conjoint_{jshorts,jints,jlongs}_atomic on Linux/BSD AArch64 do not prevent tearing

[Andrew Haley]

On Mon, 6 Oct 2025 14:17:52 GMT, Justin King <jcking at openjdk.org> wrote:

> Currently the code generates to `ldp` and `stp`, this change does have the side affect of forcing it to do `ldr` and `str`. If that seems unacceptable from a performance standpoint we can hand-roll assembly to do `ldp` and `stp`.

That would be much better.

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PR Comment: https://git.openjdk.org/jdk/pull/27647#issuecomment-3372327401