patch to add aes and pclmulqdq instructions to gcc

[Konstantin Belousov]

On Thu, Jan 17, 2013 at 09:31:40AM -0800, John-Mark Gurney wrote:
> Konstantin Belousov wrote this message on Thu, Jan 17, 2013 at 13:12 +0200:
> > On Wed, Jan 16, 2013 at 11:05:16PM -0800, John-Mark Gurney wrote:
> > > Mike Belopuhov pointed me to the patch in OpenBSD:
> > > http://freshbsd.org/commit/openbsd/0babc91a00b1f1953637bb39c8ec97aef704629e/diff.txt
> > > 
> > > While OpenBSD's binutils is quite different than FreeBSD's, I was able
> > > to use his patch to teach binutils how to assemble and disassemble the
> > > aes and pclmulqdq instructions.
> > > 
> > > I have done basic tests, such as verified that it can assemble the aesni
> > > module and get the same results, and assemble a sample file for
> > > pclmulqdq..  For each of these tests, I have verified that it's output
> > > matches (as close as possible, as gcc/clang compile callq's differently)
> > > clang on amd64..
> > Did you removed the manually assembled bytes from aes*.S and replaced them
> > with the commented-out instructions for the test ?
> 
> Yep..
Thank you, I expect that you will commit the crypto/aes change which
removes the .bytes, after the gas patch.

> 
> > There is also newer VEX encoding for the same AESNI set, but adding the
> > support for them might be hard because the source base is old.
> 
> I don't see a use for them right now.  And considering how anoying it
> was to add just these instructions.. :)

I am not asking you to do more work. It just my understanding that
Intel wants everybody migrate to VEX encoding, where available.
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