[PATCH] x86: Add Evw to emit w suffix for several instrctions for word ptr

[Jan Beulich]

On 26.05.2023 10:26, Haochen Jiang wrote:
> Currently, for instructions lldt/ltr/verr/verw/lkgs, we are missing
> w suffix for memory operands like sldt/str do. Also the Ew usage is
> not that precise under this scenario. Add Evw to fix this problem.

So why not Sv? It's used solely for segment register moves, sldt, str,
and smsw right now. We're aiming for consistency among all insns
loading / storing segment selector values (and smsw fits that pattern,
but note that lmsw does not), so introducing a new Evw can't be the
solution (or else Sv users would also need switching).

> gas/ChangeLog:
> 
> 	* testsuite/gas/i386/i386.exp: Add LKGS suffix test.

Just as a remark: You'll need to re-base this over what I've committed
half an hour or so ago.

Jan