Re: [PATCH v2 10/30] Add x86-specific parity functions

[Zeng Zhaoxiu]

å 2016å04æ06æ 18:53, Borislav Petkov åé:
> On Wed, Apr 06, 2016 at 11:37:37AM +0100, One Thousand Gnomes wrote:
> > Even that would still be wrong for the smaller parity values. The CPU
> > supports 8bit parity directly going back to the 8086 so the
> > implementation for 8bit and I think 16bit is still wrong.
> I was objecting to the unnecessary replication of the hweight/popcnt
> glue.
>
> And yes, one could look up the definition of the parity flag on x86 and
> then base the implementation of all those smaller ones on that as the
> hardware does it for one practically for free there.
>
> :-)

SETcc (SETPO etc.) added since 80386, is this a problem?