xec_bc mask fix

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1439 c046a42c-6fe2-441c-8c8c-71466251a162

target-ppc/op_helper.c

@@ -103,7 +103,7 @@ void do_store_xer (void)
     xer_so = (T0 >> XER_SO) & 0x01;
     xer_ov = (T0 >> XER_OV) & 0x01;
     xer_ca = (T0 >> XER_CA) & 0x01;
-    xer_bc = (T0 >> XER_BC) & 0x1f;
+    xer_bc = (T0 >> XER_BC) & 0x3f;
 }
 
 void do_load_msr (void)