RFR: 8278757: [s390] Implement AES Counter Mode Intrinsic [v8]

[Lutz Schmidt]

On Mon, 25 Apr 2022 13:48:41 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

>> I wanted to keep at least some safety net: prevent unsupported code from being emitted (in any build mode) and issue a speaking message in non-PRODUCT builds. If you insist, I will delete the safety net and solely rely on the flag evaluation in vm_version_s390.cpp to be correct.
>
> What would happen in product build? Jump to NULL? I wouldn't call this a safety net :-)

As far as I understand the code, bool LibraryCallKit::inline_aescrypt_Block() would return false, effectively preventing the intrinsic code to be called.

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PR: https://git.openjdk.java.net/jdk/pull/8142