RFR: 8241502: Migrate x86_64.ad to MacroAssembler

Tue Feb 9 01:38:52 UTC 2021

On Fri, 5 Feb 2021 18:43:27 GMT, Ioi Lam <iklam at openjdk.org> wrote:

>> I agree. We wanted to do that for long time.
>
> I am curious if the x86_64.o file changes in any significant way (speed of size).

I wish there was a way for the old and new versions to co-exist at the same time, so we could generate the code the old way and and the new way, then compare, for automatic verification of the MacroAssember version.

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PR: https://git.openjdk.java.net/jdk/pull/2420