Hi,
I have added a release note for Function Multiversioning which is
checked into trunk. Please review.
Thanks,
-Sri.
Index: changes.html
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RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-4.8/changes.html,v
retrieving revision 1.56
diff -u -u -p -r1.56 changes.html
--- changes.html 12 Nov 2012 15:19:33 -0000 1.56
+++ changes.html 14 Nov 2012 01:15:15 -0000
@@ -297,6 +297,34 @@ B b(42); // OK
}
</pre>
</li>
+ <li> Function Multiversioning Support with G++:
+ It is now possible to create multiple function versions each targeting a
+ specific processor and/or ISA. Function versions have the same signature
+ but different target attributes. For example, here is a program with
+ function versions:
+ <pre>
+ int foo(void)
+ {
+ return 1;
+ }
+
+ __attribute__ ((target ("sse4.2")))
+ int foo(void)
+ {
+ return 2;
+ }
+
+ int main (void)
+ {
+ int (*p) = &foo;
+ assert ((*p)() == foo());
+ return 0;
+ }
+ </pre>
+ Please refer to this
+ <a href="http://gcc.gnu.org/wiki/FunctionMultiVersioning";>wiki</a> for more
+ information.
+ </li>
</ul>
<h3 id="frv">FRV</h3>
