Date: Thu, 23 Aug 2018 22:18:45 +0000 From: Brooks Davis <brooks@freebsd.org> To: Conrad Meyer <cem@freebsd.org> Cc: Alex Richardson <arichardson@freebsd.org>, src-committers <src-committers@freebsd.org>, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r338270 - head/lib/libmd Message-ID: <20180823221845.GA24975@spindle.one-eyed-alien.net> In-Reply-To: <CAG6CVpVjytnfv4Xm2DtxNEE%2BgJ33OEnHmZwD97x-iG6iX6gPyA@mail.gmail.com> References: <201808231819.w7NIJXDG072054@repo.freebsd.org> <CAG6CVpVjytnfv4Xm2DtxNEE%2BgJ33OEnHmZwD97x-iG6iX6gPyA@mail.gmail.com>
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--Kj7319i9nmIyA2yE Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Aug 23, 2018 at 02:40:35PM -0700, Conrad Meyer wrote: > On Thu, Aug 23, 2018 at 11:19 AM, Alex Richardson > <arichardson@freebsd.org> wrote: > > Author: arichardson > > Date: Thu Aug 23 18:19:33 2018 > > New Revision: 338270 > > URL: https://svnweb.freebsd.org/changeset/base/338270 > > > > Log: > > Don't build skein_block_asm.s if we don't have an as binary > >... > > It might also be better to just > > compile the C file in userspace since the compiler can the use SSE/AV= X. >=20 > FYI, in my (limited) testing, the hand-written assembly has something > like 50% performance advantage over the reference C implementation, > even with -march=3Dnative, etc. Using the reference C version is > totally fine for bootstrapping, but the compiler is not yet smart > enough to write the assembler versions. Thanks for doing this. Sounds like we should keep the option to build if you have a GNU as around. -- Brooks --Kj7319i9nmIyA2yE Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEcBAEBAgAGBQJbfzLFAAoJEKzQXbSebgfAD3IH/107LLKFZDLnzb4UBPaPcGHz aVMsvHEJVsdBDuOWjpD8fhpT+8ss+QYLZMv5ickKuNbwCzrDyNp75UnehLPifvVQ dNjtLmx92nD7APS59aURQxvE14VI3iQ0YWJ11AkA+IikNkQk8UUxJubRQXMELNTF /b3/6KyTc0bw97Lx3o3JyXb3OaXL/VLEJcWM7Zbcv8JxoeFGhJ/y2llfV1xXMDl0 MzKmIF2lDHRs8fsIj1GK8xJlS9hbiTpEfK7sz2wneJdnFBk4uEQoU4iTvlSxBgQH xNqo6/dFtjqZP5D7AgO52/38M8NGGHh+CSFPU5kjy48zOaR3BliClHWvifzYw1A= =kVPm -----END PGP SIGNATURE----- --Kj7319i9nmIyA2yE--
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