RFR: 8308452: Extend internal Architecture enum with byte order and address size [v7]

[Martin Doerr]

On Mon, 26 Jun 2023 14:57:11 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

>> The internal enum jdk.internal.util.Architecture does not provide information about the big or little endianness or the address size (64 or 32 bits).  The endian-ness and address size are intrinsic to the architecture.
>> 
>> The values of the enum are extended to separately identify the big endian and little-endian uses of the ISA.
>> For example, `PPC64` and `PPC64LE` for the big and little-endian versions.  
>> The enum values directly reflect the build-time artifacts and resulting executables.
>> 
>> This information about an architecture will make the enum more useful especially to identify a target platform in a cross-platform use case. A method is added to map well known aliases for the platforms to the Architecture enum.
>
> Roger Riggs has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fix typo

Marked as reviewed by mdoerr (Reviewer).

Still good on PPC64.

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PR Review: https://git.openjdk.org/jdk/pull/14063#pullrequestreview-1500166353
PR Comment: https://git.openjdk.org/jdk/pull/14063#issuecomment-1608971576