RFR: 8269516: AArch64: Assembler cleanups [v2]

[Nick Gasson]

On Mon, 28 Jun 2021 12:48:29 GMT, Andrew Haley <aph at openjdk.org> wrote:

>> The core of the AArch64 assembler is unnecessarily complex, with multiple indirections from class Assembler. We can get rid of them, which makes libjvm.so faster and smaller. Also, there are some dubious casts from FloatRegister to Register which should use a proper conversion function.
>
> Andrew Haley has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Line too log

Looks OK to me

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Marked as reviewed by ngasson (Committer).

PR: https://git.openjdk.java.net/jdk/pull/4612