[jdk21] RFR: 8309531: Incorrect result with unwrapped iotaShuffle.

[Tobias Hartmann]

Backport of [JDK-8309531](https://bugs.openjdk.java.net/browse/JDK-8309531). Applies cleanly.

Thanks,
Tobias

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Commit messages:
 - 8309531: Incorrect result with unwrapped iotaShuffle.

Changes: https://git.openjdk.org/jdk21/pull/95/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21&pr=95&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8309531
  Stats: 158 lines in 2 files changed: 128 ins; 5 del; 25 mod
  Patch: https://git.openjdk.org/jdk21/pull/95.diff
  Fetch: git fetch https://git.openjdk.org/jdk21.git pull/95/head:pull/95

PR: https://git.openjdk.org/jdk21/pull/95