From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lists.gentoo.org ([140.105.134.102] helo=robin.gentoo.org) by nuthatch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1FyaNA-0007lC-57 for garchives@archives.gentoo.org; Thu, 06 Jul 2006 20:22:52 +0000 Received: from robin.gentoo.org (localhost [127.0.0.1]) by robin.gentoo.org (8.13.7/8.13.6) with SMTP id k66KJfZJ019756; Thu, 6 Jul 2006 20:19:41 GMT Received: from nf-out-0910.google.com (nf-out-0910.google.com [64.233.182.189]) by robin.gentoo.org (8.13.7/8.13.6) with ESMTP id k66KDdt1005364 for ; Thu, 6 Jul 2006 20:13:39 GMT Received: by nf-out-0910.google.com with SMTP id c29so325849nfb for ; Thu, 06 Jul 2006 13:13:39 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:from:to:subject:date:user-agent:references:in-reply-to:x-face:mime-version:content-type:content-transfer-encoding:message-id:sender; b=nXeRfZtyTinhs/VkjyDLgUngWXN90K0LSRoxdq1pdEkFrdDeZh/pGMsLTh1r/ZhxVPg+DMDwM038CmCG3tfEmEY0huTWOIELinAWhhvkhuRD/U1ntH8oS4141jC4R9tKsmm3LdIyD/R+8NTciSGuA2s+rnzaxmaFD5ifHb+/GIk= Received: by 10.48.218.19 with SMTP id q19mr738748nfg; Thu, 06 Jul 2006 13:13:39 -0700 (PDT) Received: from enterprise.flameeyes.is-a-geek.org ( [151.56.118.124]) by mx.gmail.com with ESMTP id c10sm7853045nfb.2006.07.06.13.13.38; Thu, 06 Jul 2006 13:13:39 -0700 (PDT) From: "Diego 'Flameeyes' =?utf-8?q?Petten=C3=B2?=" To: gentoo-dev@lists.gentoo.org Subject: Re: [gentoo-dev] Replacing cpu-feature USE flags Date: Thu, 6 Jul 2006 22:13:11 +0200 User-Agent: KMail/1.9.3 References: <200607061252.33028@enterprise.flameeyes.is-a-geek.org> <20060706200115.361256b4@snowdrop.home> <44AD6C60.9050406@gentoo.org> In-Reply-To: <44AD6C60.9050406@gentoo.org> X-Face: +=-v@W}H`=.Bn2t&97Un7{[.c0aP0"8)JI?7Z?E>l>ZNY|,=?utf-8?q?mL=5C3bs=0A=09xW=23jRz=7CVa=5C?=@NIS3-'W[F.^YLqK=rS:D*Ke`Y5giI@$(xIBQ<0i740;wuI{lYd>>=?utf-8?q?eFVDuAr=0A=09=3Br=5B*=7E/zd=604dEI?= Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-dev@gentoo.org Reply-to: gentoo-dev@lists.gentoo.org MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart4420418.8keAdiU38U"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200607062213.21267@enterprise.flameeyes.is-a-geek.org> Sender: "=?UTF-8?Q?Diego=20\"Flameeyes\"=20Petten=C3=B2?=" X-Archives-Salt: faa98b55-112b-41f6-80d9-964c989b4dd2 X-Archives-Hash: e01f6e5b7c9eab62e7badbc26ddba17a --nextPart4420418.8keAdiU38U Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Thursday 06 July 2006 22:02, Curtis Napier wrote: > Every developer who has ever commented on one of these threads has > always agreed with that. Put it in USE not CLFAGS. Well it's not totally right. Putting them in CFLAGS, when using -march, is redundant, pure and simple. =2Dmarch=3Dathlon64 -msse -msse2 -mmmx -m3dnow -m3dnowex would be equivalent of =2Dmarch=3Dathlon64 If you have a new Athlon64 that supports SSE3, using =2Dmarch=3Dathlon64 -msse3 is not only legit, but also (in my opinion at least) suggested. GCC can=20 improve heavily if it knows what it has to do. The problem is that people think that using =2Dmarch=3Dpentium3 -mmmx will bring them more acceleration, while this isn't true. So I would suggest anybody wanting to comment on these issue to know the=20 difference of using mmx in useflag and -mmmx in CFLAGS at the moment. And then evaluate the change in behaviour. Note: -march=3Di586 -mmmx for Pentium (classic) MMX is a good idea most of = the=20 times, as it's not an i686 but at the same time it has MMX support. =2D-=20 Diego "Flameeyes" Petten=C3=B2 - http://farragut.flameeyes.is-a-geek.org/ Gentoo/Alt lead, Gentoo/FreeBSD, Video, AMD64, Sound, PAM, KDE --nextPart4420418.8keAdiU38U Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQBErW7he2h1+2mHVWMRAk5pAJ47zqT7qbZQ765LF/CWzYkIiWhkwgCfU2fw o89c0cpmWtA23yAonZe01ho= =dH0p -----END PGP SIGNATURE----- --nextPart4420418.8keAdiU38U-- -- gentoo-dev@gentoo.org mailing list