--- libatomic_ops-1.2/src/atomic_ops/sysdeps/gcc/powerpc.h.bak	2006-03-29 00:49:14.000000000 +0200
+++ libatomic_ops-1.2/src/atomic_ops/sysdeps/gcc/powerpc.h	2007-05-27 02:11:34.531353813 +0200
@@ -72,12 +72,12 @@
   /* registers.  I always got "impossible constraint" when I	*/
   /* tried the "y" constraint.					*/
   __asm__ __volatile__ (
-    "lwz %0,%1\n"
+    "lwz %0,0(%1)\n"
     "cmpw cr7,%0,%0\n"
     "bne- cr7,1f\n"
     "1: isync\n"
     : "=r" (result)
-    : "m"(*addr) : "memory", "cc");
+    : "b"(addr) : "memory", "cc");
   return result;
 }