Re: PATCH: Enable Intel AES/CLMUL

["H.J. Lu" <hjl.tools@gmail.com>]

On Fri, Apr 4, 2008 at 7:50 AM, Jakub Jelinek <jakub@redhat.com> wrote:
> On Fri, Apr 04, 2008 at 04:33:51PM +0200, Uros Bizjak wrote:
>  > This will work just fine even without SSE (although a warning about
>  > changed ABI will be issued). We can even add AES functionality to the
>  > library this way (hint, hint ;)
>  >
>  > And using intrinsic, the situation will be actually just reversed to
>  > the situation you described below.
>
>  This doesn't make sense.  The aes instructions use SSE2 registers,
>  so IMNSHO you really have to enable sse2 to be able to emit aes/pclmul
>  instructions.  So it makes perfect sense for -maes to enable -msse2.
>
>

That is what I prefer. You will need SSE2 when you use -maes. Otherwise,
you can't really do much with AES. I will check in the version which -maes
enables SSE2. We can change it later before 4.4 release.

Thanks.


H.J.