From owner-freebsd-arch@FreeBSD.ORG Fri Oct 5 03:32:57 2012 Return-Path: Delivered-To: freebsd-arch@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 919AC106566B; Fri, 5 Oct 2012 03:32:57 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from mail.zoral.com.ua (mx0.zoral.com.ua [91.193.166.200]) by mx1.freebsd.org (Postfix) with ESMTP id 0BFB08FC0A; Fri, 5 Oct 2012 03:32:55 +0000 (UTC) Received: from skuns.kiev.zoral.com.ua (localhost [127.0.0.1]) by mail.zoral.com.ua (8.14.2/8.14.2) with ESMTP id q953WuK2052369; Fri, 5 Oct 2012 06:32:56 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: from deviant.kiev.zoral.com.ua (kostik@localhost [127.0.0.1]) by deviant.kiev.zoral.com.ua (8.14.5/8.14.5) with ESMTP id q953Wie8074074; Fri, 5 Oct 2012 06:32:44 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: (from kostik@localhost) by deviant.kiev.zoral.com.ua (8.14.5/8.14.5/Submit) id q953Wiwa074073; Fri, 5 Oct 2012 06:32:44 +0300 (EEST) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: deviant.kiev.zoral.com.ua: kostik set sender to kostikbel@gmail.com using -f Date: Fri, 5 Oct 2012 06:32:44 +0300 From: Konstantin Belousov To: Dag-Erling Sm??rgrav Message-ID: <20121005033244.GL35915@deviant.kiev.zoral.com.ua> References: <506C385C.3020400@FreeBSD.org> <506DEB4C.5020508@andric.com> <86haq9hq2c.fsf@ds4.des.no> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="i8OEs6gA6Pkg4k/n" Content-Disposition: inline In-Reply-To: <86haq9hq2c.fsf@ds4.des.no> User-Agent: Mutt/1.5.21 (2010-09-15) X-Virus-Scanned: clamav-milter 0.95.2 at skuns.kiev.zoral.com.ua X-Virus-Status: Clean X-Spam-Status: No, score=-4.0 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 autolearn=ham version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on skuns.kiev.zoral.com.ua Cc: Dimitry Andric , Andriy Gapon , freebsd-arch@freebsd.org Subject: Re: x86 boot code build X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 05 Oct 2012 03:32:57 -0000 --i8OEs6gA6Pkg4k/n Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Oct 04, 2012 at 11:42:35PM +0200, Dag-Erling Sm??rgrav wrote: > Dimitry Andric writes: > > Well, do we still officially support any real i386 machines? >=20 > No, 486 and up only. Personally, I think we should ship 586 binaries > (pentium-mmx) by default. There is absolutely no architectural difference between usermode ISA between i386 and pentiums, ignoring SMP-support instructions, which are usually not emited by the compiler anyway. Really interesting stuff started appearing with pentium pro, like CMOV instructions. Even more important, -march=3Dpentiumpro generates much better -fPIC code (probably could be activated by -mcpu=3Dpentiumpro). Anyway, we shall support 486 in the default 32bit build. --i8OEs6gA6Pkg4k/n Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (FreeBSD) iEYEARECAAYFAlBuVNwACgkQC3+MBN1Mb4hKZQCfZ5AkIUMCYn+F7ajxjfrSSr0B SoEAoMqj+uGFrIw7fYRc5jg+G/hEHcTT =OURS -----END PGP SIGNATURE----- --i8OEs6gA6Pkg4k/n--