[PATCH] x86: Support BHI_CTRL instruction

[Christian Ludloff]

> +ibhf, 0xf30f1ef8, BHI_CTRL, NoSuf|Size64, {}
>
> So Size64 is here to have REX.W emitted. The whitepaper isn't clear about APX
> at all, though: Would REX2.W also have the same effect? (Whichever way it is,
> this then perhaps also wants covering in the testsuite.)

I asked Intel for clarification when IBHF got published.

Their unofficial reply was to only use F3 48 0F 1E F8.

Not REX2.
Not EVEX.

Whenever this makes it into the SDM, Intel can clarify.

--
C.