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Date: Wed, 25 Feb 2015 00:27:00 +0300
From: Solar Designer <>
Subject: Re: SIMD SHA-crypt, etc.

On Tue, Feb 24, 2015 at 10:14:19PM +0100, magnum wrote:
> On 2015-02-24 07:34, Solar Designer wrote:
> > BTW, are the icc-compiled sse-intrinsics-{32,64}.S files abandoned?
> > No commits to them since May 2014, and I think they're incompatible with
> > the rest of the tree now (they lack SHA-2).  I guess autoconf does not
> > use them anyway?  I guess the recent changes broke the Makefile.legacy
> > target that would use them?  What is the plan here?
> SHA2 is indeed in there. We should update them but I just tried a build
> --with-icc-asm on Super and it seems to work like a champ (well it
> doesn't emit build warnings and it passes all self-tests). Raw MD4 and
> MD5 are significantly faster while Raw SHA1 is slower although this was
> an OMP build running one thread. SHA2 is slower (it's not interleaved -
> icc's superior speeds are from interleaving better).

Oh, it's good news that this isn't broken yet.  Let's keep it in there
unless it actually becomes difficult to maintain at some point.


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