[PATCH] x86: Replace CpuABM with CpuPOPCNT

[Jan Beulich]

On 17.02.2020 16:42, H.J. Lu wrote:
> On Mon, Feb 17, 2020 at 7:40 AM Jan Beulich <jbeulich@suse.com> wrote:
>>
>> On 17.02.2020 16:27, H.J. Lu wrote:
>>> AMD ABM has 2 instructions: popcnt and lzcnt.  ABM CPUID feature bit has
>>> been reused for lzcnt and a POPCNT CPUID feature bit is added for popcnt.
>>> This patch removes CpuABM and adds CpuPOPCNT.  It changes ABM to enable
>>> both lzcnt and popcnt, changes SSE4.2 to also enable popcnt.
>>
>> I don't think removing support for something may have in active and
>> working use is a good idea. Adding some better mechanism as
>> _suggested_ replacement is of course fine, but people would better
>> not be forced to change their _correct_ code because of gas side
>> change.
> 
> No assembly code changes are needed.  The .abm directive still works
> as before.  My patch only changes assembler internal implementation.

Oh, I'm sorry for the noise then. I apparently didn't look closely
enough.

Jan