RFR: 8296916: RISC-V: Move some small macro-assembler functions to header file [v2]

[Fei Yang]

On Wed, 16 Nov 2022 07:37:38 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> But this is okay as well.

Thanks. I will take another look to see if we can further improve this after this one is merged.

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PR: https://git.openjdk.org/jdk/pull/11130