diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 8cb9560b54f6..11695b7b4703 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,8 @@
+2009-09-14  Andrew Stubbs  <ams@codesourcery.com>
+
+	* config/cpu/sh/atomicity.h (__exchange_and_add): Set earlyclobber
+	constraint.
+
 2009-09-11  Johannes Singler  <singler@ira.uka.de>
 
         * include/parallel/multiway_merge.h
diff --git a/libstdc++-v3/config/cpu/sh/atomicity.h b/libstdc++-v3/config/cpu/sh/atomicity.h
index 251d49ff2b9c..9b240afbcc7c 100644
--- a/libstdc++-v3/config/cpu/sh/atomicity.h
+++ b/libstdc++-v3/config/cpu/sh/atomicity.h
@@ -44,7 +44,7 @@ _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
        "\tadd\t%3,r0\n"
        "\tmovco.l\tr0,@%2\n"
        "\tbf\t0b"
-       : "+m" (*__mem), "=r" (__result)
+       : "+m" (*__mem), "=&r" (__result)
        : "r" (__mem), "rI08" (__val)
        : "r0");