RFR: 8340189: 8339531 incorrect for Big Endian platforms

[Martin Doerr]

On Mon, 30 Sep 2024 09:19:21 GMT, Per Minborg <pminborg at openjdk.org> wrote:

> This PR suggests fixing a problem on big-endian platforms.

This version uses little endian accesses on big endian machines. This may defeat the purpose of [JDK-8339531](https://bugs.openjdk.org/browse/JDK-8339531) for those platforms. Accesses are typically slower when using them with endianness mismatch. But it looks at least correct.

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Marked as reviewed by mdoerr (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/21258#pullrequestreview-2367346560