RFR: 8319184: RISC-V: improve MD5 intrinsic [v4]

[Fei Yang]

On Tue, 7 Nov 2023 16:20:47 GMT, Antonios Printezis <tonyp at openjdk.org> wrote:

>> Tweaks to the RISC-V MD5 intrinsic.
>> 
>> * do the loads from the buffer more incrementally instead of all in one go
>> * don't mask off the top 32 bits of a register before an addw instruction, as addw will ignore them anyway
>> * remove the rmask32 register, as the mask is not needed any more (only at the start / end and it's 
>> * cleanup some of the register usage
>
> Antonios Printezis has updated the pull request incrementally with one additional commit since the last revision:
> 
>   variable renaming

Updated change looks good. Thanks.

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Marked as reviewed by fyang (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/16453#pullrequestreview-1719274842