[RFC] RISC-V: Support Zvabd extension instructions.

[Jiawei]

Hi Jan,

You can find the spec with follow link,

https://lf-riscv.atlassian.net/wiki/spaces/VXXX/pages/166690866/Fast-Track+Proposal+for+integer+vector+absolute+difference+instructions#5.-Supporting-Materials

In the fifth section embedded a PDF document.

I have also attached it to the email, Thank you.


BR,

Jiawei


在 2025/9/8 14:19, Jan Beulich 写道:
> On 19.08.2025 03:39, Jiawei wrote:
>> 在 2025/8/18 20:16, Jan Beulich 写道:
>>> On 18.08.2025 13:29, Jiawei wrote:
>>>> This patch supports Zvabd extension instructions:
>>>> https://github.com/riscv/integer-vector-absolute-difference
>>> Where in that repo, which looks to simply be a clone that's behind its origin,
>>> is this new extension documented? For example, there's no src/Zvabd.adoc.
>> The total extension information can get form
>>
>> https://lf-riscv.atlassian.net/browse/RVS-3896
> Now that I got around to looking at it - I can't find the relevant spec text
> there either. Can you please provide a proper link to the documentation of
> this extension? That is, to just that doc, not any bigger container thereof?
> For example, from the new testcase in the patch I am to conclude that
> "<insn> ..., v0.t" forms aren't supported. The encoding, otoh, suggests they
> are, but examples thereof are merely missing from the testcase.
>
> Jan
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