RFR: 8345125: Aarch64: Add aarch64 backend for Float16 scalar operations [v2]

[Manuel Hässig]

On Tue, 25 Feb 2025 19:45:31 GMT, Bhavana Kilambi <bkilambi at openjdk.org> wrote:

>> This patch adds aarch64 backend for scalar FP16 operations namely - add, subtract, multiply, divide, fma, sqrt, min and max.
>
> Bhavana Kilambi has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Address review comments

Can you please uncomment the following tests using aarch64 float16 in this PR?

https://github.com/mhaessig/jdk/blob/cec48ed270d3bdf704c389a091b42a32c2ed6440/test/hotspot/jtreg/compiler/floatingpoint/TestSubNodeFloatDoubleNegation.java#L58-L60

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PR Comment: https://git.openjdk.org/jdk/pull/23748#issuecomment-2808699783