RFR: 8319716: RISC-V: Add SHA-2 [v9]

[Robbin Ehn]

On Fri, 22 Dec 2023 13:54:05 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 incrementally with three additional commits since the last revision:
> 
>  - remove merge, renames
>  - Easier reg layout and 128/m2
>  - Minor update

Passes compiler/intrinsics/sha/ with:
QEMU_CPU=rv64,v=true,vext_spec=v1.0,vlen=128,elen=64,rvv_ma_all_1s=true,rvv_ta_all_1s=true,zvknhb=true
QEMU_CPU=rv64,v=true,vext_spec=v1.0,vlen=256,elen=64,rvv_ma_all_1s=true,rvv_ta_all_1s=true,zvknhb=true

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PR Comment: https://git.openjdk.org/jdk/pull/16562#issuecomment-1867727508