--- a/src/hotspot/cpu/ppc/interp_masm_ppc_64.cpp	Tue Dec 19 20:14:52 2017 -0800
+++ b/src/hotspot/cpu/ppc/interp_masm_ppc_64.cpp	Tue Jan 09 08:38:22 2018 +0100
@@ -1,6 +1,6 @@
 /*
- * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2012, 2017 SAP SE. All rights reserved.
+ * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2018 SAP SE. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -32,6 +32,10 @@
 #include "runtime/safepointMechanism.hpp"
 #include "runtime/sharedRuntime.hpp"
 
+// Implementation of InterpreterMacroAssembler.
+
+// This file specializes the assembler with interpreter-specific macros.
+
 #ifdef PRODUCT
 #define BLOCK_COMMENT(str) // nothing
 #else