nightmorph 09/06/13 07:38:31 Modified: gentoo-amd64-faq.xml Log: updated amd64 faq. added a section on differences between amd64 and em64t. included link to source. and rehashed some info from the amd64.g.o project page. hopefully this will clear up confusion.
Revision Changes Path 1.34 xml/htdocs/doc/en/gentoo-amd64-faq.xml file : http://sources.gentoo.org/viewcvs.py/gentoo/xml/htdocs/doc/en/gentoo-amd64-faq.xml?rev=1.34&view=markup plain: http://sources.gentoo.org/viewcvs.py/gentoo/xml/htdocs/doc/en/gentoo-amd64-faq.xml?rev=1.34&content-type=text/plain diff : http://sources.gentoo.org/viewcvs.py/gentoo/xml/htdocs/doc/en/gentoo-amd64-faq.xml?r1=1.33&r2=1.34 Index: gentoo-amd64-faq.xml =================================================================== RCS file: /var/cvsroot/gentoo/xml/htdocs/doc/en/gentoo-amd64-faq.xml,v retrieving revision 1.33 retrieving revision 1.34 diff -u -r1.33 -r1.34 --- gentoo-amd64-faq.xml 24 Apr 2009 17:13:41 -0000 1.33 +++ gentoo-amd64-faq.xml 13 Jun 2009 07:38:31 -0000 1.34 @@ -1,6 +1,6 @@ <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE guide SYSTEM "/dtd/guide.dtd"> -<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/gentoo-amd64-faq.xml,v 1.33 2009/04/24 17:13:41 nightmorph Exp $ --> +<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/gentoo-amd64-faq.xml,v 1.34 2009/06/13 07:38:31 nightmorph Exp $ --> <guide link="/doc/en/gentoo-amd64-faq.xml"> <title>Gentoo Linux/AMD64 Frequently Asked Questions</title> @@ -29,8 +29,8 @@ <!-- See http://creativecommons.org/licenses/by-sa/2.5 --> <license/> -<version>1.24</version> -<date>2009-04-24</date> +<version>1.25</version> +<date>2009-06-13</date> <faqindex> <title>Questions</title> @@ -52,14 +52,38 @@ <chapter> <title>Installation</title> +<section id="difference"> +<title>What's the difference between AMD64 and EM64T?</title> +<body> + +<p> +Both refer to 64-bit processors from AMD (AMD64) and Intel (EM64T). AMD's 64-bit +processors include the Athlon 64, Turion, Neo, Phenom, and Opteron families. Intel's +64-bit processors include the Core2, Celeron, Xeon, and Pentium (all based on +the Core2 architecture). The <uri +link="http://en.wikipedia.org/wiki/Em64t#Intel_64";>last few versions</uri> of the +old Pentium 4 and Xeon chips also support EM64T. +</p> + +<p> +The AMD line of 64-bit processors were released well ahead of Intel's offering. +Therefore, for historical reasons the arch keyword for all x86-64 compatible +architectures is amd64. As such, <e>AMD64</e> is a generic reference to 64-bit +chips, whether AMD or Intel. +</p> + +</body> +</section> <section id="cflags"> <title>What CFLAGS should I use for AMD64/EM64T?</title> <body> <p> You should use simple <c>CFLAGS</c> to avoid future problems with your system. -Supported <c>CFLAGS</c> are <c>-O2 -march=k8 -pipe</c> for non-EM64T systems and -<c>-O2 -march=nocona -pipe</c> for EM64T systems. +Supported <c>CFLAGS</c> are <c>-O2 -march=k8 -pipe</c> for AMD systems. Intel +Core2-based systems (EM64T) should use <c>-O2 -march=core2 -pipe</c>. If you're +on an old Intel Pentium 4 that supports EM64T, then use <c>-O2 -march=nocona +-pipe</c>. </p> </body>
