[Libre-soc-dev] sv.mv x: the instruction from hell

[Jacob Lifshay]

On Sun, Jun 5, 2022, 03:20 Jacob Lifshay <programmerjake at gmail.com> wrote:

> On Sun, Jun 5, 2022, 02:58 lkcl <luke.leighton at gmail.com> wrote:
>
>> you're laser-focussing on SV only to the detriment of the rest of the ISA,
>> and we have to be in a position to have good justification for
>> *everything*
>> that is proposed.  mv.x as a stand-alone Scalar instruction is so bad that
>> i would *agree* with any objections by the ISA WG to its inclusion, and
>> consequently it cannot be relied on to exist as a basis for an SVP64
>> variant.
>>
>
we could define mv.x to be a SV-only instruction...it would illegal
instruction trap if not sv prefixed.

Jacob

>