From: Ward Poelmans <wpoely86@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] USE="mmx mmxext sse sse2 ssse3 3dnow 3dnowext"
Date: Thu, 28 May 2009 22:27:22 +0200 [thread overview]
Message-ID: <c1c10dab0905281327o7ee3edb9j6329989ffc1326e@mail.gmail.com> (raw)
In-Reply-To: <047506CD-647D-472E-A96B-96C278C31F51@stellar.eclipse.co.uk>
On Thu, May 28, 2009 at 22:19, Stroller <stroller@stellar.eclipse.co.uk> wrote:
> What's the difference between supporting the "certain set of instructions"
> with "-march=" and doing so with USEs?
>
> Or doesn't "-march=" support additional "certain sets of instructions". What
> does it do, then?
The difference is that with the USE flag, you enable the use of
assembly code in the source of mplayer that makes use of the "certain
set of instructions". The -march option enables the use of the
"certain set of instructions" when gcc is optimizing and so gcc will
use the "certain set of instructions" when it converts the source code
into assembly code.
Ward
next prev parent reply other threads:[~2009-05-28 20:27 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-26 4:27 [gentoo-user] USE="mmx mmxext sse sse2 ssse3 3dnow 3dnowext" Stroller
2009-05-26 4:37 ` Adam Carter
2009-05-26 4:59 ` Volker Armin Hemmann
2009-05-26 4:37 ` Volker Armin Hemmann
2009-05-26 5:00 ` Stroller
2009-05-26 5:10 ` Volker Armin Hemmann
2009-05-26 6:15 ` Stroller
2009-05-26 6:27 ` Volker Armin Hemmann
2009-05-26 8:34 ` Stroller
2009-05-26 14:31 ` Daniel Iliev
2009-05-26 21:07 ` Stroller
2009-05-27 0:47 ` Daniel Iliev
2009-05-27 8:14 ` Stroller
2009-05-27 10:00 ` Daniel Iliev
2009-05-27 12:14 ` Stroller
2009-05-27 19:57 ` Wyatt Epp
2009-05-27 20:04 ` Volker Armin Hemmann
2009-05-27 20:09 ` Alan McKinnon
2009-05-27 20:40 ` Wyatt Epp
2009-05-27 20:47 ` Volker Armin Hemmann
2009-05-27 21:04 ` Mike Edenfield
2009-05-27 21:12 ` Alan McKinnon
2009-05-27 23:00 ` Adam Carter
2009-05-27 20:08 ` Ward Poelmans
2009-05-27 21:04 ` Mike Edenfield
2009-05-27 21:23 ` Arttu V.
2009-05-28 10:17 ` Daniel Iliev
2009-05-28 19:13 ` Stroller
2009-05-28 20:08 ` Ward Poelmans
2009-05-28 20:19 ` Stroller
2009-05-28 20:27 ` Ward Poelmans [this message]
2009-05-28 20:38 ` Stroller
2009-05-29 5:30 ` Graham Murray
2009-05-29 6:36 ` Volker Armin Hemmann
2009-05-29 6:55 ` Volker Armin Hemmann
2009-05-29 15:25 ` Mike Edenfield
2009-05-29 7:51 ` Neil Bothwick
2009-05-26 22:20 ` KH
2009-05-26 22:26 ` KH
2009-05-26 22:32 ` Alan McKinnon
2009-05-26 13:26 ` [gentoo-user] " James
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