On 21/10/12 00:14, Gerald Pfeifer wrote: > On Wed, 10 Oct 2012, Andreas Krebbel wrote: >> the attached patch adds initial support for the latest release of >> the IBM mainframe series - the IBM zEnterprise EC12 (zEC12). > > Nice. Can you please also add a note to the release notes at > gcc-4.8/changes.html ? > > In principle, I'm also in favor of adding a news item to our > main page for updates like this since it shows how GCC is > evolving and supporting the latest hardware releases (even > if, like here, the code changes are not huge). > > Gerald >
Sure. What about something like this? Index: htdocs/index.html =================================================================== RCS file: /cvs/gcc/wwwdocs/htdocs/index.html,v retrieving revision 1.865 diff -u -r1.865 index.html --- htdocs/index.html 6 Nov 2012 12:17:13 -0000 1.865 +++ htdocs/index.html 7 Nov 2012 09:36:17 -0000 @@ -53,6 +53,12 @@ <dl class="news"> +<dt><span>IBM zEnterprise EC12 support</span> + <span class="date">[2012-10-10]</span></dt> +<dd>Support for the latest release of the System z mainframe +<a href="http://www.ibm.com/systems/z/hardware/zenterprise/zec12.html";>zEC12</a> +has been added to the architecture back-end.</dd> + <dt><span><a href="gcc-4.7/">GCC 4.7.2</a> released</span> <span class="date">[2012-09-20]</span></dt> <dd></dd> Index: htdocs/gcc-4.8/changes.html =================================================================== RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-4.8/changes.html,v retrieving revision 1.53 diff -u -r1.53 changes.html --- htdocs/gcc-4.8/changes.html 4 Nov 2012 15:22:03 -0000 1.53 +++ htdocs/gcc-4.8/changes.html 7 Nov 2012 09:36:17 -0000 @@ -325,6 +325,29 @@ command-line option.</li> </ul> +<h3>S/390, System z</h3> + <ul> + <li>Support for the IBM zEnterprise zEC12 processor has been + added. When using the <code>-march=zEC12</code> option, the + compiler will generate code making use of the following new + instructions: + <ul> + <li>load and trap instructions</li> + <li>2 new compare and trap instructions</li> + <li>rotate and insert selected bits - without CC clobber</li> + </ul> + The <code>-mtune=zEC12</code> option enables zEC12 specific + instruction scheduling without making use of new + instructions.</li> + <li>Register pressure sensitive insn scheduling is enabled by + default.</li> + <li>The IFUNC function attribute is enabled by default.</li> + <li>memcpy and memcmp invokations on big memory chunks or with + runtime lengths are not generated inline anymore when tuning for + z10 or higher. The purpose is to make use of the IFUNC + optimized versions in Glibc.</li> + </ul> + <h3 id="sh">SH</h3> <ul> <li>The default alignment settings have been reduced to be less aggressive.
