[PATCH] x86: Support Zhaoxin PadLock XMODX instructions

[Mayshao-oc]

> On 17.01.2025 10:00, Mayshao-oc wrote:
> >      This patch adds support for Zhaoxin XMODX instructions.
> >      The CPUID EDX bit[28] indicates its enablement, and it includes 
> > REP XMODEXP and REP MONTMUL2. XMODX stands for modular exponentiation, 
> > it indicates the support of modular exponentiation feature, both REP 
> > XMODEXP and REP MONTMUL2 use it.
> >      Test ok, ok for trunk?
> 
> Looks good to me, except there's a possible issue with the gas/NEWS entry:
> As you were likely aware up front, the 2.44 branch was created over the weekend. Generally I wouldn't expect late feature additions to still be eligible to go on the branch; Nick, do you concur? If so, the existing entry may not be altered, and a new one (for 2.45) would need creating instead. (Once this is settled, I'd be okay making the adjustment [if necessary] while committing the change on your behalf.)
Thanks for your comment. I appreciate you could commit the change on my behalf after the possible issue is settled.
> 
> Jan
BR
MayShao