Index: wwwdocs/htdocs/gcc-4.6/changes.html
===================================================================
--- wwwdocs.orig/htdocs/gcc-4.6/changes.html	2011-01-02 22:36:57.000000000 +0100
+++ wwwdocs/htdocs/gcc-4.6/changes.html	2011-01-02 23:10:07.862964200 +0100
@@ -180,6 +180,11 @@
       calls to functions that return to the current unit only via returning
       or exception handling.  This is the case for most library functions
       that have no callbacks.</li>
+    <li>Support of new type <code>__int128</code> for targets having
+    wide enough machine-mode support.</li>

So, this is beyond just x86?  (We already have an item 

  "Darwin, FreeBSD, MinGW and Cygwin now all support 
  <code>__float128</code> on 32-bit x86 targets."