[PATCH] x86: Support BHI_CTRL instruction

[Christian Ludloff]

On Wed, Jun 3, 2026 at 1:16 AM Jiang, Haochen <haochen.jiang@intel.com> wrote:
> I am confirming with arch team for these issues. This instruction seems to me
> the first instruction we only borrowed W1 with no effect, other using REX.W1
> at least implied operand size. This definitely needs some clarification.
>
> Will come back to you all after I get a clear answer.

Arguably RDSSP{D,Q} is a litmus test – can it REX2 or EVEX?

--
C.