[PATCH] x86: Support BHI_CTRL instruction

[Jan Beulich]

On 02.06.2026 10:26, Jan Beulich wrote:
> On 01.06.2026 08:24, Haochen Jiang wrote:
>> The following patch aimed to add BHI_CTRL. The ISA has been published in a
>> separate tech paper last year and still missing its assembler/disassembler
>> support.
>>
>> One tricky thing is that it utilized part of the nops encoding and we need
>> to keep the same behavior for the not touched one, i.e., repz nop. That is
>> why I added a Fixup for now since I did not have a better idea for that.
>> Discussions are welcomed on this.
> 
> Instead of this, add a decode step through prefix_table[]?

Oh, wait - that's already in place. The problem is the REX.W aspect. For that
a fixup likely is indeed best.

Jan