RFR: 8319716: RISC-V: Add SHA-2 [v11]

[Robbin Ehn]

On Fri, 5 Jan 2024 08:26:10 GMT, Robbin Ehn <rehn at openjdk.org> wrote:

>> Hi, please consider.
>> 
>> Main author is @luhenry, I only fixed some minor things and tested it.
>> 
>> Such as:
>> test/hotspot/jtreg/compiler/intrinsics/sha/
>> test/jdk/java/security/MessageDigest/
>> test/jdk/jdk/security/
>> tier1
>> 
>> And still running some test.
>
> Robbin Ehn has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 20 additional commits since the last revision:
> 
>  - Fixed comment
>  - Fixed flags
>  - Fixed vlen 128
>  - Merge branch 'master' into sha256
>  - fixed lmul
>  - remove merge, renames
>  - Easier reg layout and 128/m2
>  - Minor update
>  - index store state back
>  - t2 caller saved, no need to push/pop
>  - ... and 10 more: https://git.openjdk.org/jdk/compare/a79d2ea2...01105251

Ran the tests (compiler/intrinsics/sha/) with -XX:+PrintFlagsFinal and verified the MaxVectorSize was 16/32.
Manually tested the flags.

Thanks, Robbin

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PR Comment: https://git.openjdk.org/jdk/pull/16562#issuecomment-1878297512