RFR: 8248404: AArch64: Remove uses of long and unsigned long [v4]

[Andrew Haley]

On Wed, 12 Jan 2022 13:48:37 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> I added ptrdiff_t but that's the same as int64_t.  I'll fix it.
>
> I need ptrdiff_t additionally to get this to compile on our macosx-aarch64 platform.

That sounds fine. I'd add it unconditionally for all platforms.

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PR: https://git.openjdk.java.net/jdk/pull/7023