[PATCH v2] Support Intel FRED LKGS

[Jan Beulich]

On 22.05.2023 08:07, Zhang, Jun wrote:
> This patch is the second version about Intel FRED and LKGS instructions.
> It has fixed all comments except "Ew", because I don't know how to fix it.
> Jan, could you help me?

Well, there are two ways of approaching this, but imo in either case via
a prereq change to the other insns that use this operand descriptor in a
questionable manner. We could split decode at the ModR/M.mod level, but
perhaps better is to follow MOV to/from sreg, SLDT, and STR in using a D
suffix and an Sv operand.

If, however, you're not happy about making the prereq change first, I'd
be kind of okay with the change being committed as is, and I'd then try
to remember to follow up accordingly. One minor adjustment request,
though: In the opcode table comments, can you please use singular for
LKGS (while plural is fine for FRED)?

Jan