[PATCH 0/4] x86: fold a number of VEX and EVEX templates

[Jan Beulich]

On 18.09.2023 07:47, Cui, Lili wrote:
>> -----Original Message-----
>> From: Hongtao Liu <crazylht@gmail.com>
>> Sent: Monday, September 18, 2023 9:58 AM
>>
>> On Fri, Sep 15, 2023 at 4:46 PM Jan Beulich via Binutils
>> <binutils@sourceware.org> wrote:
>>>
>>> The last two patches are explicitly RFC, for having a possibly
>>> unwanted side effect.
>> We're about to send out APX patches, @Lili Cui  cloud you take a look at the
>> series?
> 
> Since APX only needs to promote the VEX instructions without corresponding EVEX, these folding VEX and EVEX template patches has no effect on our internal APX patches.

I don't follow: As soon as you have an insn with both a VEX and an EVEX encoding,
there can be potential for folding (ideally right when APX is being introduced,
rather than once again leaving it to me to clean up later).

Jan