[PATCH] x86: Remove AVX10.2 256 bit rounding support

[Jiang, Haochen]

> From: H.J. Lu <hjl.tools@gmail.com>
> Sent: Thursday, March 20, 2025 1:05 AM
> 
> On Wed, Mar 19, 2025 at 2:31 AM Jan Beulich <jbeulich@suse.com> wrote:
> >
> > On 19.03.2025 10:17, Haochen Jiang wrote:
> > > AVX10 whitepaper just got a major change that all the platforms will
> > > support 512 bit vector width (previously, E-core is up to 256 bit,
> > > leading to hybrid clients and Atom Server 256 bit only).
> > >
> > > Ref: https://cdrdv2.intel.com/v1/dl/getContent/784343
> >
> > Before I look at the patch in any detail: That's only the Technical Paper,
> > not the specification. Are you sure you also mean to remove that capability
> > from the spec? I.e. not allowing re-consideration in the future, or others
> > to implement only a 256-bit variant? Even if so, should we really rip out
> > everything, rather than just making that feature default-disabled?
> >
> > Jan
> 
> This is the change which Intel software people have been pushing for
> a long time.  Adding a 256-bit variant makes it difficult for Intel customers
> to write codes to run on all AVX10 CPUs.
> 
> This patch set is approved.

I am going to commit the patch today and backport it to Binutils 2.44 branch
Tomorrow.

Thx,
Haochen

> 
> Thanks.
> 
> --
> H.J.