RFR: 8303417: RISC-V: Merge vector instructs with similar match rules [v2]

[Fei Yang]

On Thu, 1 Jun 2023 01:52:30 GMT, Yanhong Zhu <yzhu at openjdk.org> wrote:

>> Merge vector instructs with similar match rules in riscv_v.ad.
>> 
>> Tier 1~3 passed on QEMU with RVV supported.
>
> Yanhong Zhu has updated the pull request incrementally with one additional commit since the last revision:
> 
>   modify format in vabs

Updated change looks good. Thanks.

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Marked as reviewed by fyang (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/14214#pullrequestreview-1454449118