diff a/src/hotspot/cpu/ppc/templateTable_ppc.hpp b/src/hotspot/cpu/ppc/templateTable_ppc.hpp
--- a/src/hotspot/cpu/ppc/templateTable_ppc.hpp
+++ b/src/hotspot/cpu/ppc/templateTable_ppc.hpp
@@ -1,8 +1,8 @@
 /*
- * Copyright (c) 2014, 2023, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2013, 2023 SAP SE. All rights reserved.
+ * Copyright (c) 2014, 2026, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2026 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
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
@@ -29,10 +29,12 @@
   static void prepare_invoke(Register Rcache, Register Rret_addr, Register Rrecv, Register Rscratch);
   static void invokevfinal_helper(Register Rcache, Register Rscratch1, Register Rscratch2, Register Rscratch3, Register Rscratch4);
   static void generate_vtable_call(Register Rrecv_klass, Register Rindex, Register Rret, Register Rtemp);
   static void invokeinterface_object_method(Register Rrecv_klass, Register Rret, Register Rflags, Register Rcache, Register Rtemp, Register Rtemp2);
 
+  static void invoke_is_substitutable(Register aobj, Register bobj, Label& is_subst, Label& not_subst);
+
   // Branch_conditional which takes TemplateTable::Condition.
   static void branch_conditional(ConditionRegister crx, TemplateTable::Condition cc, Label& L, bool invert = false);
-  static void if_cmp_common(Register Rfirst, Register Rsecond, Register Rscratch1, Register Rscratch2, Condition cc, bool is_jint, bool cmp0);
+  static void if_cmp_common(Register Rfirst, Register Rsecond, Register Rscratch1, Register Rscratch2, Condition cc, bool is_jint, bool is_acmp = false);
 
 #endif // CPU_PPC_TEMPLATETABLE_PPC_HPP