diff -r e92153ed8bdc -r 29b0d0b61615 src/hotspot/os_cpu/aix_ppc/atomic_aix_ppc.hpp
--- a/src/hotspot/os_cpu/aix_ppc/atomic_aix_ppc.hpp	Mon Nov 25 12:30:24 2019 +0100
+++ b/src/hotspot/os_cpu/aix_ppc/atomic_aix_ppc.hpp	Mon Nov 25 12:31:39 2019 +0100
@@ -96,13 +96,13 @@
 struct Atomic::PlatformAdd
   : Atomic::AddAndFetch<Atomic::PlatformAdd<byte_size> >
 {
-  template<typename I, typename D>
-  D add_and_fetch(I add_value, D volatile* dest, atomic_memory_order order) const;
+  template<typename D, typename I>
+  D add_and_fetch(D volatile* dest, I add_value, atomic_memory_order order) const;
 };
 
 template<>
-template<typename I, typename D>
-inline D Atomic::PlatformAdd<4>::add_and_fetch(I add_value, D volatile* dest,
+template<typename D, typename I>
+inline D Atomic::PlatformAdd<4>::add_and_fetch(D volatile* dest, I add_value,
                                                atomic_memory_order order) const {
   STATIC_ASSERT(4 == sizeof(I));
   STATIC_ASSERT(4 == sizeof(D));
@@ -127,8 +127,8 @@
 
 
 template<>
-template<typename I, typename D>
-inline D Atomic::PlatformAdd<8>::add_and_fetch(I add_value, D volatile* dest,
+template<typename D, typename I>
+inline D Atomic::PlatformAdd<8>::add_and_fetch(D volatile* dest, I add_value,
                                                atomic_memory_order order) const {
   STATIC_ASSERT(8 == sizeof(I));
   STATIC_ASSERT(8 == sizeof(D));