From mboxrd@z Thu Jan 1 00:00:00 1970 From: Leo Famulari Subject: Re: [PATCH 2/2] gnu: icecat: Use libjpeg-turbo instead of bundled libjpeg. Date: Sun, 27 Nov 2016 17:44:02 -0500 Message-ID: <20161127224402.GB1254@jasmine> References: <20161127201707.3789-1-me@tobias.gr> <20161127201707.3789-2-me@tobias.gr> <20161127205618.GC27187@jasmine> <20161127214119.GB30774@jasmine> <87wpfotwwk.fsf@kirby.i-did-not-set--mail-host-address--so-tickle-me> <87twastv4y.fsf@kirby.i-did-not-set--mail-host-address--so-tickle-me> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="24zk1gE8NUlDmwG9" Return-path: Received: from eggs.gnu.org ([2001:4830:134:3::10]:56360) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cB8B6-0004mZ-Bn for guix-devel@gnu.org; Sun, 27 Nov 2016 17:44:09 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cB8B1-00025a-HJ for guix-devel@gnu.org; Sun, 27 Nov 2016 17:44:08 -0500 Received: from out5-smtp.messagingengine.com ([66.111.4.29]:37919) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cB8B1-00025R-Ce for guix-devel@gnu.org; Sun, 27 Nov 2016 17:44:03 -0500 Content-Disposition: inline In-Reply-To: <87twastv4y.fsf@kirby.i-did-not-set--mail-host-address--so-tickle-me> List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org Sender: "Guix-devel" To: Marius Bakke Cc: guix-devel@gnu.org --24zk1gE8NUlDmwG9 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Nov 27, 2016 at 11:28:45PM +0100, Marius Bakke wrote: > Marius Bakke writes: >=20 > > Leo Famulari writes: > > > >> On Sun, Nov 27, 2016 at 10:02:35PM +0100, Tobias Geerinckx-Rice wrote: > >>> Leo, > >>>=20 > >>> On 27/11/16 21:56, Leo Famulari wrote: > >>> > Will this work on nachines that don't support SSE? My understanding= is > >>> > that we don't wish to require it. > >>>=20 > >>> Why wouldn't it? > >>>=20 > >>> I don't often use Icecat, but when I do... I don't see why it would > >>> require SSE by default. ;-) And it's not like we ever patched it to u= se > >>> IJG's libjpeg to begin with. > >> > >> I'm not sure, but the comment seems to indicate that we don't want to > >> use it: > >> > >> ;; According to > >> ;; http://sourceforge.net/projects/libjpeg-turbo/ , > >> ;; "libjpeg-turbo is a derivative of libjpeg that > >> ;; uses MMX, SSE, SSE2, and NEON SIMD instructions > >> ;; to accelerate baseline JPEG compression/ > >> ;; decompression", so we had better not use it > > > > SSE is pentium III, and SSE2 was introduced in Pentium IV. MMX is even > > older. Are we really committed to supporting 15+ year old hardware? >=20 > Digging a bit further, SSE2 is actually part of the AMD64 > specification[0]. Perhaps we could make it conditional on architecture? >=20 > 0: https://en.wikipedia.org/wiki/SSE2#CPU_support Sure, if it requires SSE2 to run, and we keep the status quo regarding i686, I don't see why not. --24zk1gE8NUlDmwG9 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEsFFZSPHn08G5gDigJkb6MLrKfwgFAlg7YbEACgkQJkb6MLrK fwj5zRAAwmt1fyJmVNRSWHUL4EpYcC3CxtzUr9ciSGuyn247b8bgsEGFvIdxGnBz FC1m2Aby8Xx1VkYViMA7Y2F0iqYiQSdz88uYNBRL/vXixoXrTZ5BWrWn+GR8xxx1 QfYiLJAi5NZih9No8O1JZlJfcvFlct/opSGCyhNjm19yy7uk/CbUxJUDUzQhdpFa yGtenA29pbCs4+I4VEWJVLCHcv20G16ot6xU2e7Jn/quwkI4bLzPYpd+q4e9CZ4I eOKZP2kQtXT6/nCvxJCogTMxMuGoHPwWZKKugTecGZCsj6ghH2ZPf2Mg7jCsvdHD kDRCIBuT7fPnqrnCn2Q55HvtmXi5IWDDVmjQuRmIR7MTiIfwa6XR8ei0c8/3crM6 BNyvp3CWEkBS4dZ8EjRA8F6JGkcligYTBI5dm772LYLqLj5svnYRa0i6EYdTLf0k AfGd2PBYPpAm7h+L+xiRkP5Z/ytb5K67fXCS/lxEF5u7VtpiOynMGH+DuhYFSbKE bif8/wmjDzzkB8JsA0lYBVq2JVOj0gFzCEDJh1lSBAKw5Churzk1/ZkW2NAOijB7 Zcm3vpbNQgd7w4rGJvqoaKwIduhKcFsb64s1MEo7eEQ++exs9F6xSul6PnYMuuQB 0Sfvimmv9eSDtOJEOOrmREF4uQBJ6mvtBKr9Qqq71OVrcc0bazw= =6zki -----END PGP SIGNATURE----- --24zk1gE8NUlDmwG9--