[jdk21u-dev] RFR: 8309685: Fix -Wconversion warnings in assembler and register code

[Martin Doerr]

On Mon, 13 May 2024 15:59:29 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> The backport is not clean because [JDK-8331421](https://bugs.openjdk.org/browse/JDK-8331421) was backported ahead of it.
> 
> Additional testing:
>  - [x] Linux x86_64 server fastdebug, `all` tests pass

LGTM. I would have delayed my backport if I knew you wanted to do this one.

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Marked as reviewed by mdoerr (Reviewer).

PR Review: https://git.openjdk.org/jdk21u-dev/pull/567#pullrequestreview-2129965750