Intel AMX and feature detection

[Robert Muir]

On Wed, Jun 26, 2024 at 7:03 PM John Rose <john.r.rose at oracle.com> wrote:
>
> Actually we have VectorShape.S_64_BIT which, if it is
> the preferred shape, is really telling you the
> “vector” processing is inside the CPU not the VPU.
> That’s a good-enough hint to avoid the Vector API,
> right?

That's not what I see. On an x86 machine without AVX, both FloatVector
and IntVector say 128-bit, but if we use IntVector it results in 30x
slower lucene :(