diff --git a/src/hotspot/share/oops/accessBackend.hpp b/src/hotspot/share/oops/accessBackend.hpp
index a705392..abcf59a 100644
--- a/src/hotspot/share/oops/accessBackend.hpp
+++ b/src/hotspot/share/oops/accessBackend.hpp
@@ -22,16 +22,26 @@
  *
  */
 
-#ifndef SHARE_VM_RUNTIME_ACCESSBACKEND_HPP
-#define SHARE_VM_RUNTIME_ACCESSBACKEND_HPP
+#ifndef SHARE_OOPS_ACCESSBACKEND_HPP
+#define SHARE_OOPS_ACCESSBACKEND_HPP
 
+#include "gc/shared/barrierSetConfig.hpp"
+#include "memory/allocation.hpp"
 #include "metaprogramming/conditional.hpp"
+#include "metaprogramming/decay.hpp"
 #include "metaprogramming/enableIf.hpp"
 #include "metaprogramming/integralConstant.hpp"
+#include "metaprogramming/isFloatingPoint.hpp"
+#include "metaprogramming/isIntegral.hpp"
+#include "metaprogramming/isPointer.hpp"
 #include "metaprogramming/isSame.hpp"
+#include "metaprogramming/isVolatile.hpp"
+#include "oops/accessDecorators.hpp"
+#include "oops/oopsHierarchy.hpp"
 #include "utilities/debug.hpp"
 #include "utilities/globalDefinitions.hpp"
 
+
 // This metafunction returns either oop or narrowOop depending on whether
 // an access needs to use compressed oops or not.
 template <DecoratorSet decorators>
@@ -395,4 +405,894 @@ public:
   static bool equals(oop o1, oop o2) { return o1 == o2; }
 };
 
-#endif // SHARE_VM_RUNTIME_ACCESSBACKEND_HPP
+// Below is the implementation of the first 4 steps of the template pipeline:
+// * Step 1: Set default decorators and decay types. This step gets rid of CV qualifiers
+//           and sets default decorators to sensible values.
+// * Step 2: Reduce types. This step makes sure there is only a single T type and not
+//           multiple types. The P type of the address and T type of the value must
+//           match.
+// * Step 3: Pre-runtime dispatch. This step checks whether a runtime call can be
+//           avoided, and in that case avoids it (calling raw accesses or
+//           primitive accesses in a build that does not require primitive GC barriers)
+// * Step 4: Runtime-dispatch. This step performs a runtime dispatch to the corresponding
+//           BarrierSet::AccessBarrier accessor that attaches GC-required barriers
+//           to the access.
+
+namespace AccessInternal {
+  template <typename T>
+  struct OopOrNarrowOopInternal: AllStatic {
+    typedef oop type;
+  };
+
+  template <>
+  struct OopOrNarrowOopInternal<narrowOop>: AllStatic {
+    typedef narrowOop type;
+  };
+
+  // This metafunction returns a canonicalized oop/narrowOop type for a passed
+  // in oop-like types passed in from oop_* overloads where the user has sworn
+  // that the passed in values should be oop-like (e.g. oop, oopDesc*, arrayOop,
+  // narrowOoop, instanceOopDesc*, and random other things).
+  // In the oop_* overloads, it must hold that if the passed in type T is not
+  // narrowOop, then it by contract has to be one of many oop-like types implicitly
+  // convertible to oop, and hence returns oop as the canonical oop type.
+  // If it turns out it was not, then the implicit conversion to oop will fail
+  // to compile, as desired.
+  template <typename T>
+  struct OopOrNarrowOop: AllStatic {
+    typedef typename OopOrNarrowOopInternal<typename Decay<T>::type>::type type;
+  };
+
+  inline void* field_addr(oop base, ptrdiff_t byte_offset) {
+    return reinterpret_cast<void*>(reinterpret_cast<intptr_t>((void*)base) + byte_offset);
+  }
+  // Step 4: Runtime dispatch
+  // The RuntimeDispatch class is responsible for performing a runtime dispatch of the
+  // accessor. This is required when the access either depends on whether compressed oops
+  // is being used, or it depends on which GC implementation was chosen (e.g. requires GC
+  // barriers). The way it works is that a function pointer initially pointing to an
+  // accessor resolution function gets called for each access. Upon first invocation,
+  // it resolves which accessor to be used in future invocations and patches the
+  // function pointer to this new accessor.
+
+  template <DecoratorSet decorators, typename T, BarrierType type>
+  struct RuntimeDispatch: AllStatic {};
+
+  template <DecoratorSet decorators, typename T>
+  struct RuntimeDispatch<decorators, T, BARRIER_STORE>: AllStatic {
+    typedef typename AccessFunction<decorators, T, BARRIER_STORE>::type func_t;
+    static func_t _store_func;
+
+    static void store_init(void* addr, T value);
+
+    static inline void store(void* addr, T value) {
+      _store_func(addr, value);
+    }
+  };
+
+  template <DecoratorSet decorators, typename T>
+  struct RuntimeDispatch<decorators, T, BARRIER_STORE_AT>: AllStatic {
+    typedef typename AccessFunction<decorators, T, BARRIER_STORE_AT>::type func_t;
+    static func_t _store_at_func;
+
+    static void store_at_init(oop base, ptrdiff_t offset, T value);
+
+    static inline void store_at(oop base, ptrdiff_t offset, T value) {
+      _store_at_func(base, offset, value);
+    }
+  };
+
+  template <DecoratorSet decorators, typename T>
+  struct RuntimeDispatch<decorators, T, BARRIER_LOAD>: AllStatic {
+    typedef typename AccessFunction<decorators, T, BARRIER_LOAD>::type func_t;
+    static func_t _load_func;
+
+    static T load_init(void* addr);
+
+    static inline T load(void* addr) {
+      return _load_func(addr);
+    }
+  };
+
+  template <DecoratorSet decorators, typename T>
+  struct RuntimeDispatch<decorators, T, BARRIER_LOAD_AT>: AllStatic {
+    typedef typename AccessFunction<decorators, T, BARRIER_LOAD_AT>::type func_t;
+    static func_t _load_at_func;
+
+    static T load_at_init(oop base, ptrdiff_t offset);
+
+    static inline T load_at(oop base, ptrdiff_t offset) {
+      return _load_at_func(base, offset);
+    }
+  };
+
+  template <DecoratorSet decorators, typename T>
+  struct RuntimeDispatch<decorators, T, BARRIER_ATOMIC_CMPXCHG>: AllStatic {
+    typedef typename AccessFunction<decorators, T, BARRIER_ATOMIC_CMPXCHG>::type func_t;
+    static func_t _atomic_cmpxchg_func;
+
+    static T atomic_cmpxchg_init(T new_value, void* addr, T compare_value);
+
+    static inline T atomic_cmpxchg(T new_value, void* addr, T compare_value) {
+      return _atomic_cmpxchg_func(new_value, addr, compare_value);
+    }
+  };
+
+  template <DecoratorSet decorators, typename T>
+  struct RuntimeDispatch<decorators, T, BARRIER_ATOMIC_CMPXCHG_AT>: AllStatic {
+    typedef typename AccessFunction<decorators, T, BARRIER_ATOMIC_CMPXCHG_AT>::type func_t;
+    static func_t _atomic_cmpxchg_at_func;
+
+    static T atomic_cmpxchg_at_init(T new_value, oop base, ptrdiff_t offset, T compare_value);
+
+    static inline T atomic_cmpxchg_at(T new_value, oop base, ptrdiff_t offset, T compare_value) {
+      return _atomic_cmpxchg_at_func(new_value, base, offset, compare_value);
+    }
+  };
+
+  template <DecoratorSet decorators, typename T>
+  struct RuntimeDispatch<decorators, T, BARRIER_ATOMIC_XCHG>: AllStatic {
+    typedef typename AccessFunction<decorators, T, BARRIER_ATOMIC_XCHG>::type func_t;
+    static func_t _atomic_xchg_func;
+
+    static T atomic_xchg_init(T new_value, void* addr);
+
+    static inline T atomic_xchg(T new_value, void* addr) {
+      return _atomic_xchg_func(new_value, addr);
+    }
+  };
+
+  template <DecoratorSet decorators, typename T>
+  struct RuntimeDispatch<decorators, T, BARRIER_ATOMIC_XCHG_AT>: AllStatic {
+    typedef typename AccessFunction<decorators, T, BARRIER_ATOMIC_XCHG_AT>::type func_t;
+    static func_t _atomic_xchg_at_func;
+
+    static T atomic_xchg_at_init(T new_value, oop base, ptrdiff_t offset);
+
+    static inline T atomic_xchg_at(T new_value, oop base, ptrdiff_t offset) {
+      return _atomic_xchg_at_func(new_value, base, offset);
+    }
+  };
+
+  template <DecoratorSet decorators, typename T>
+  struct RuntimeDispatch<decorators, T, BARRIER_ARRAYCOPY>: AllStatic {
+    typedef typename AccessFunction<decorators, T, BARRIER_ARRAYCOPY>::type func_t;
+    static func_t _arraycopy_func;
+
+    static bool arraycopy_init(arrayOop src_obj, arrayOop dst_obj, T *src, T* dst, size_t length);
+
+    static inline bool arraycopy(arrayOop src_obj, arrayOop dst_obj, T *src, T* dst, size_t length) {
+      return _arraycopy_func(src_obj, dst_obj, src, dst, length);
+    }
+  };
+
+  template <DecoratorSet decorators, typename T>
+  struct RuntimeDispatch<decorators, T, BARRIER_CLONE>: AllStatic {
+    typedef typename AccessFunction<decorators, T, BARRIER_CLONE>::type func_t;
+    static func_t _clone_func;
+
+    static void clone_init(oop src, oop dst, size_t size);
+
+    static inline void clone(oop src, oop dst, size_t size) {
+      _clone_func(src, dst, size);
+    }
+  };
+
+  template <DecoratorSet decorators, typename T>
+  struct RuntimeDispatch<decorators, T, BARRIER_RESOLVE>: AllStatic {
+    typedef typename AccessFunction<decorators, T, BARRIER_RESOLVE>::type func_t;
+    static func_t _resolve_func;
+
+    static oop resolve_init(oop obj);
+
+    static inline oop resolve(oop obj) {
+      return _resolve_func(obj);
+    }
+  };
+
+  template <DecoratorSet decorators, typename T>
+  struct RuntimeDispatch<decorators, T, BARRIER_EQUALS>: AllStatic {
+    typedef typename AccessFunction<decorators, T, BARRIER_EQUALS>::type func_t;
+    static func_t _equals_func;
+
+    static bool equals_init(oop o1, oop o2);
+
+    static inline bool equals(oop o1, oop o2) {
+      return _equals_func(o1, o2);
+    }
+  };
+
+  // Initialize the function pointers to point to the resolving function.
+  template <DecoratorSet decorators, typename T>
+  typename AccessFunction<decorators, T, BARRIER_STORE>::type
+  RuntimeDispatch<decorators, T, BARRIER_STORE>::_store_func = &store_init;
+
+  template <DecoratorSet decorators, typename T>
+  typename AccessFunction<decorators, T, BARRIER_STORE_AT>::type
+  RuntimeDispatch<decorators, T, BARRIER_STORE_AT>::_store_at_func = &store_at_init;
+
+  template <DecoratorSet decorators, typename T>
+  typename AccessFunction<decorators, T, BARRIER_LOAD>::type
+  RuntimeDispatch<decorators, T, BARRIER_LOAD>::_load_func = &load_init;
+
+  template <DecoratorSet decorators, typename T>
+  typename AccessFunction<decorators, T, BARRIER_LOAD_AT>::type
+  RuntimeDispatch<decorators, T, BARRIER_LOAD_AT>::_load_at_func = &load_at_init;
+
+  template <DecoratorSet decorators, typename T>
+  typename AccessFunction<decorators, T, BARRIER_ATOMIC_CMPXCHG>::type
+  RuntimeDispatch<decorators, T, BARRIER_ATOMIC_CMPXCHG>::_atomic_cmpxchg_func = &atomic_cmpxchg_init;
+
+  template <DecoratorSet decorators, typename T>
+  typename AccessFunction<decorators, T, BARRIER_ATOMIC_CMPXCHG_AT>::type
+  RuntimeDispatch<decorators, T, BARRIER_ATOMIC_CMPXCHG_AT>::_atomic_cmpxchg_at_func = &atomic_cmpxchg_at_init;
+
+  template <DecoratorSet decorators, typename T>
+  typename AccessFunction<decorators, T, BARRIER_ATOMIC_XCHG>::type
+  RuntimeDispatch<decorators, T, BARRIER_ATOMIC_XCHG>::_atomic_xchg_func = &atomic_xchg_init;
+
+  template <DecoratorSet decorators, typename T>
+  typename AccessFunction<decorators, T, BARRIER_ATOMIC_XCHG_AT>::type
+  RuntimeDispatch<decorators, T, BARRIER_ATOMIC_XCHG_AT>::_atomic_xchg_at_func = &atomic_xchg_at_init;
+
+  template <DecoratorSet decorators, typename T>
+  typename AccessFunction<decorators, T, BARRIER_ARRAYCOPY>::type
+  RuntimeDispatch<decorators, T, BARRIER_ARRAYCOPY>::_arraycopy_func = &arraycopy_init;
+
+  template <DecoratorSet decorators, typename T>
+  typename AccessFunction<decorators, T, BARRIER_CLONE>::type
+  RuntimeDispatch<decorators, T, BARRIER_CLONE>::_clone_func = &clone_init;
+
+  template <DecoratorSet decorators, typename T>
+  typename AccessFunction<decorators, T, BARRIER_RESOLVE>::type
+  RuntimeDispatch<decorators, T, BARRIER_RESOLVE>::_resolve_func = &resolve_init;
+
+  template <DecoratorSet decorators, typename T>
+  typename AccessFunction<decorators, T, BARRIER_EQUALS>::type
+  RuntimeDispatch<decorators, T, BARRIER_EQUALS>::_equals_func = &equals_init;
+
+  // Step 3: Pre-runtime dispatching.
+  // The PreRuntimeDispatch class is responsible for filtering the barrier strength
+  // decorators. That is, for AS_RAW, it hardwires the accesses without a runtime
+  // dispatch point. Otherwise it goes through a runtime check if hardwiring was
+  // not possible.
+  struct PreRuntimeDispatch: AllStatic {
+    template<DecoratorSet decorators>
+    struct CanHardwireRaw: public IntegralConstant<
+      bool,
+      !HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value || // primitive access
+      !HasDecorator<decorators, INTERNAL_CONVERT_COMPRESSED_OOP>::value || // don't care about compressed oops (oop* address)
+      HasDecorator<decorators, INTERNAL_RT_USE_COMPRESSED_OOPS>::value> // we can infer we use compressed oops (narrowOop* address)
+    {};
+
+    static const DecoratorSet convert_compressed_oops = INTERNAL_RT_USE_COMPRESSED_OOPS | INTERNAL_CONVERT_COMPRESSED_OOP;
+
+    template<DecoratorSet decorators>
+    static bool is_hardwired_primitive() {
+      return !HasDecorator<decorators, INTERNAL_BT_BARRIER_ON_PRIMITIVES>::value &&
+             !HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value;
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      HasDecorator<decorators, AS_RAW>::value && CanHardwireRaw<decorators>::value>::type
+    store(void* addr, T value) {
+      typedef RawAccessBarrier<decorators & RAW_DECORATOR_MASK> Raw;
+      if (HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value) {
+        Raw::oop_store(addr, value);
+      } else {
+        Raw::store(addr, value);
+      }
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      HasDecorator<decorators, AS_RAW>::value && !CanHardwireRaw<decorators>::value>::type
+    store(void* addr, T value) {
+      if (UseCompressedOops) {
+        const DecoratorSet expanded_decorators = decorators | convert_compressed_oops;
+        PreRuntimeDispatch::store<expanded_decorators>(addr, value);
+      } else {
+        const DecoratorSet expanded_decorators = decorators & ~convert_compressed_oops;
+        PreRuntimeDispatch::store<expanded_decorators>(addr, value);
+      }
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      !HasDecorator<decorators, AS_RAW>::value>::type
+    store(void* addr, T value) {
+      if (is_hardwired_primitive<decorators>()) {
+        const DecoratorSet expanded_decorators = decorators | AS_RAW;
+        PreRuntimeDispatch::store<expanded_decorators>(addr, value);
+      } else {
+        RuntimeDispatch<decorators, T, BARRIER_STORE>::store(addr, value);
+      }
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      HasDecorator<decorators, AS_RAW>::value>::type
+    store_at(oop base, ptrdiff_t offset, T value) {
+      store<decorators>(field_addr(base, offset), value);
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      !HasDecorator<decorators, AS_RAW>::value>::type
+    store_at(oop base, ptrdiff_t offset, T value) {
+      if (is_hardwired_primitive<decorators>()) {
+        const DecoratorSet expanded_decorators = decorators | AS_RAW;
+        PreRuntimeDispatch::store_at<expanded_decorators>(base, offset, value);
+      } else {
+        RuntimeDispatch<decorators, T, BARRIER_STORE_AT>::store_at(base, offset, value);
+      }
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      HasDecorator<decorators, AS_RAW>::value && CanHardwireRaw<decorators>::value, T>::type
+    load(void* addr) {
+      typedef RawAccessBarrier<decorators & RAW_DECORATOR_MASK> Raw;
+      if (HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value) {
+        return Raw::template oop_load<T>(addr);
+      } else {
+        return Raw::template load<T>(addr);
+      }
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      HasDecorator<decorators, AS_RAW>::value && !CanHardwireRaw<decorators>::value, T>::type
+    load(void* addr) {
+      if (UseCompressedOops) {
+        const DecoratorSet expanded_decorators = decorators | convert_compressed_oops;
+        return PreRuntimeDispatch::load<expanded_decorators, T>(addr);
+      } else {
+        const DecoratorSet expanded_decorators = decorators & ~convert_compressed_oops;
+        return PreRuntimeDispatch::load<expanded_decorators, T>(addr);
+      }
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      !HasDecorator<decorators, AS_RAW>::value, T>::type
+    load(void* addr) {
+      if (is_hardwired_primitive<decorators>()) {
+        const DecoratorSet expanded_decorators = decorators | AS_RAW;
+        return PreRuntimeDispatch::load<expanded_decorators, T>(addr);
+      } else {
+        return RuntimeDispatch<decorators, T, BARRIER_LOAD>::load(addr);
+      }
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      HasDecorator<decorators, AS_RAW>::value, T>::type
+    load_at(oop base, ptrdiff_t offset) {
+      return load<decorators, T>(field_addr(base, offset));
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      !HasDecorator<decorators, AS_RAW>::value, T>::type
+    load_at(oop base, ptrdiff_t offset) {
+      if (is_hardwired_primitive<decorators>()) {
+        const DecoratorSet expanded_decorators = decorators | AS_RAW;
+        return PreRuntimeDispatch::load_at<expanded_decorators, T>(base, offset);
+      } else {
+        return RuntimeDispatch<decorators, T, BARRIER_LOAD_AT>::load_at(base, offset);
+      }
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      HasDecorator<decorators, AS_RAW>::value && CanHardwireRaw<decorators>::value, T>::type
+    atomic_cmpxchg(T new_value, void* addr, T compare_value) {
+      typedef RawAccessBarrier<decorators & RAW_DECORATOR_MASK> Raw;
+      if (HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value) {
+        return Raw::oop_atomic_cmpxchg(new_value, addr, compare_value);
+      } else {
+        return Raw::atomic_cmpxchg(new_value, addr, compare_value);
+      }
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      HasDecorator<decorators, AS_RAW>::value && !CanHardwireRaw<decorators>::value, T>::type
+    atomic_cmpxchg(T new_value, void* addr, T compare_value) {
+      if (UseCompressedOops) {
+        const DecoratorSet expanded_decorators = decorators | convert_compressed_oops;
+        return PreRuntimeDispatch::atomic_cmpxchg<expanded_decorators>(new_value, addr, compare_value);
+      } else {
+        const DecoratorSet expanded_decorators = decorators & ~convert_compressed_oops;
+        return PreRuntimeDispatch::atomic_cmpxchg<expanded_decorators>(new_value, addr, compare_value);
+      }
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      !HasDecorator<decorators, AS_RAW>::value, T>::type
+    atomic_cmpxchg(T new_value, void* addr, T compare_value) {
+      if (is_hardwired_primitive<decorators>()) {
+        const DecoratorSet expanded_decorators = decorators | AS_RAW;
+        return PreRuntimeDispatch::atomic_cmpxchg<expanded_decorators>(new_value, addr, compare_value);
+      } else {
+        return RuntimeDispatch<decorators, T, BARRIER_ATOMIC_CMPXCHG>::atomic_cmpxchg(new_value, addr, compare_value);
+      }
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      HasDecorator<decorators, AS_RAW>::value, T>::type
+    atomic_cmpxchg_at(T new_value, oop base, ptrdiff_t offset, T compare_value) {
+      return atomic_cmpxchg<decorators>(new_value, field_addr(base, offset), compare_value);
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      !HasDecorator<decorators, AS_RAW>::value, T>::type
+    atomic_cmpxchg_at(T new_value, oop base, ptrdiff_t offset, T compare_value) {
+      if (is_hardwired_primitive<decorators>()) {
+        const DecoratorSet expanded_decorators = decorators | AS_RAW;
+        return PreRuntimeDispatch::atomic_cmpxchg_at<expanded_decorators>(new_value, base, offset, compare_value);
+      } else {
+        return RuntimeDispatch<decorators, T, BARRIER_ATOMIC_CMPXCHG_AT>::atomic_cmpxchg_at(new_value, base, offset, compare_value);
+      }
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      HasDecorator<decorators, AS_RAW>::value && CanHardwireRaw<decorators>::value, T>::type
+    atomic_xchg(T new_value, void* addr) {
+      typedef RawAccessBarrier<decorators & RAW_DECORATOR_MASK> Raw;
+      if (HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value) {
+        return Raw::oop_atomic_xchg(new_value, addr);
+      } else {
+        return Raw::atomic_xchg(new_value, addr);
+      }
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      HasDecorator<decorators, AS_RAW>::value && !CanHardwireRaw<decorators>::value, T>::type
+    atomic_xchg(T new_value, void* addr) {
+      if (UseCompressedOops) {
+        const DecoratorSet expanded_decorators = decorators | convert_compressed_oops;
+        return PreRuntimeDispatch::atomic_xchg<expanded_decorators>(new_value, addr);
+      } else {
+        const DecoratorSet expanded_decorators = decorators & ~convert_compressed_oops;
+        return PreRuntimeDispatch::atomic_xchg<expanded_decorators>(new_value, addr);
+      }
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      !HasDecorator<decorators, AS_RAW>::value, T>::type
+    atomic_xchg(T new_value, void* addr) {
+      if (is_hardwired_primitive<decorators>()) {
+        const DecoratorSet expanded_decorators = decorators | AS_RAW;
+        return PreRuntimeDispatch::atomic_xchg<expanded_decorators>(new_value, addr);
+      } else {
+        return RuntimeDispatch<decorators, T, BARRIER_ATOMIC_XCHG>::atomic_xchg(new_value, addr);
+      }
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      HasDecorator<decorators, AS_RAW>::value, T>::type
+    atomic_xchg_at(T new_value, oop base, ptrdiff_t offset) {
+      return atomic_xchg<decorators>(new_value, field_addr(base, offset));
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      !HasDecorator<decorators, AS_RAW>::value, T>::type
+    atomic_xchg_at(T new_value, oop base, ptrdiff_t offset) {
+      if (is_hardwired_primitive<decorators>()) {
+        const DecoratorSet expanded_decorators = decorators | AS_RAW;
+        return PreRuntimeDispatch::atomic_xchg<expanded_decorators>(new_value, base, offset);
+      } else {
+        return RuntimeDispatch<decorators, T, BARRIER_ATOMIC_XCHG_AT>::atomic_xchg_at(new_value, base, offset);
+      }
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      HasDecorator<decorators, AS_RAW>::value && CanHardwireRaw<decorators>::value, bool>::type
+    arraycopy(arrayOop src_obj, arrayOop dst_obj, T* src, T* dst, size_t length) {
+      typedef RawAccessBarrier<decorators & RAW_DECORATOR_MASK> Raw;
+      if (HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value) {
+        return Raw::oop_arraycopy(src_obj, dst_obj, src, dst, length);
+      } else {
+        return Raw::arraycopy(src_obj, dst_obj, src, dst, length);
+      }
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      HasDecorator<decorators, AS_RAW>::value && !CanHardwireRaw<decorators>::value, bool>::type
+    arraycopy(arrayOop src_obj, arrayOop dst_obj, T* src, T* dst, size_t length) {
+      if (UseCompressedOops) {
+        const DecoratorSet expanded_decorators = decorators | convert_compressed_oops;
+        return PreRuntimeDispatch::arraycopy<expanded_decorators>(src_obj, dst_obj, src, dst, length);
+      } else {
+        const DecoratorSet expanded_decorators = decorators & ~convert_compressed_oops;
+        return PreRuntimeDispatch::arraycopy<expanded_decorators>(src_obj, dst_obj, src, dst, length);
+      }
+    }
+
+    template <DecoratorSet decorators, typename T>
+    inline static typename EnableIf<
+      !HasDecorator<decorators, AS_RAW>::value, bool>::type
+    arraycopy(arrayOop src_obj, arrayOop dst_obj, T* src, T* dst, size_t length) {
+      if (is_hardwired_primitive<decorators>()) {
+        const DecoratorSet expanded_decorators = decorators | AS_RAW;
+        return PreRuntimeDispatch::arraycopy<expanded_decorators>(src_obj, dst_obj, src, dst, length);
+      } else {
+        return RuntimeDispatch<decorators, T, BARRIER_ARRAYCOPY>::arraycopy(src_obj, dst_obj, src, dst, length);
+      }
+    }
+
+    template <DecoratorSet decorators>
+    inline static typename EnableIf<
+      HasDecorator<decorators, AS_RAW>::value>::type
+    clone(oop src, oop dst, size_t size) {
+      typedef RawAccessBarrier<decorators & RAW_DECORATOR_MASK> Raw;
+      Raw::clone(src, dst, size);
+    }
+
+    template <DecoratorSet decorators>
+    inline static typename EnableIf<
+      !HasDecorator<decorators, AS_RAW>::value>::type
+    clone(oop src, oop dst, size_t size) {
+      RuntimeDispatch<decorators, oop, BARRIER_CLONE>::clone(src, dst, size);
+    }
+
+    template <DecoratorSet decorators>
+    inline static typename EnableIf<
+      HasDecorator<decorators, INTERNAL_BT_TO_SPACE_INVARIANT>::value, oop>::type
+    resolve(oop obj) {
+      typedef RawAccessBarrier<decorators & RAW_DECORATOR_MASK> Raw;
+      return Raw::resolve(obj);
+    }
+
+    template <DecoratorSet decorators>
+    inline static typename EnableIf<
+      !HasDecorator<decorators, INTERNAL_BT_TO_SPACE_INVARIANT>::value, oop>::type
+    resolve(oop obj) {
+      return RuntimeDispatch<decorators, oop, BARRIER_RESOLVE>::resolve(obj);
+    }
+
+    template <DecoratorSet decorators>
+    inline static typename EnableIf<
+      HasDecorator<decorators, INTERNAL_BT_TO_SPACE_INVARIANT>::value, bool>::type
+    equals(oop o1, oop o2) {
+      typedef RawAccessBarrier<decorators & RAW_DECORATOR_MASK> Raw;
+      return Raw::equals(o1, o2);
+    }
+
+    template <DecoratorSet decorators>
+    inline static typename EnableIf<
+      !HasDecorator<decorators, INTERNAL_BT_TO_SPACE_INVARIANT>::value, bool>::type
+    equals(oop o1, oop o2) {
+      return RuntimeDispatch<decorators, oop, BARRIER_EQUALS>::equals(o1, o2);
+    }
+  };
+
+  // This class adds implied decorators that follow according to decorator rules.
+  // For example adding default reference strength and default memory ordering
+  // semantics.
+  template <DecoratorSet input_decorators>
+  struct DecoratorFixup: AllStatic {
+    // If no reference strength has been picked, then strong will be picked
+    static const DecoratorSet ref_strength_default = input_decorators |
+      (((ON_DECORATOR_MASK & input_decorators) == 0 && (INTERNAL_VALUE_IS_OOP & input_decorators) != 0) ?
+       ON_STRONG_OOP_REF : INTERNAL_EMPTY);
+    // If no memory ordering has been picked, unordered will be picked
+    static const DecoratorSet memory_ordering_default = ref_strength_default |
+      ((MO_DECORATOR_MASK & ref_strength_default) == 0 ? MO_UNORDERED : INTERNAL_EMPTY);
+    // If no barrier strength has been picked, normal will be used
+    static const DecoratorSet barrier_strength_default = memory_ordering_default |
+      ((AS_DECORATOR_MASK & memory_ordering_default) == 0 ? AS_NORMAL : INTERNAL_EMPTY);
+    // Heap array accesses imply it is a heap access
+    static const DecoratorSet heap_array_is_in_heap = barrier_strength_default |
+      ((IN_HEAP_ARRAY & barrier_strength_default) != 0 ? IN_HEAP : INTERNAL_EMPTY);
+    static const DecoratorSet conc_root_is_root = heap_array_is_in_heap |
+      ((IN_CONCURRENT_ROOT & heap_array_is_in_heap) != 0 ? IN_ROOT : INTERNAL_EMPTY);
+    static const DecoratorSet archive_root_is_root = conc_root_is_root |
+      ((IN_ARCHIVE_ROOT & conc_root_is_root) != 0 ? IN_ROOT : INTERNAL_EMPTY);
+    static const DecoratorSet value = archive_root_is_root | BT_BUILDTIME_DECORATORS;
+  };
+
+  // Step 2: Reduce types.
+  // Enforce that for non-oop types, T and P have to be strictly the same.
+  // P is the type of the address and T is the type of the values.
+  // As for oop types, it is allow to send T in {narrowOop, oop} and
+  // P in {narrowOop, oop, HeapWord*}. The following rules apply according to
+  // the subsequent table. (columns are P, rows are T)
+  // |           | HeapWord  |   oop   | narrowOop |
+  // |   oop     |  rt-comp  | hw-none |  hw-comp  |
+  // | narrowOop |     x     |    x    |  hw-none  |
+  //
+  // x means not allowed
+  // rt-comp means it must be checked at runtime whether the oop is compressed.
+  // hw-none means it is statically known the oop will not be compressed.
+  // hw-comp means it is statically known the oop will be compressed.
+
+  template <DecoratorSet decorators, typename T>
+  inline void store_reduce_types(T* addr, T value) {
+    PreRuntimeDispatch::store<decorators>(addr, value);
+  }
+
+  template <DecoratorSet decorators>
+  inline void store_reduce_types(narrowOop* addr, oop value) {
+    const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP |
+                                             INTERNAL_RT_USE_COMPRESSED_OOPS;
+    PreRuntimeDispatch::store<expanded_decorators>(addr, value);
+  }
+
+  template <DecoratorSet decorators>
+  inline void store_reduce_types(narrowOop* addr, narrowOop value) {
+    const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP |
+                                             INTERNAL_RT_USE_COMPRESSED_OOPS;
+    PreRuntimeDispatch::store<expanded_decorators>(addr, value);
+  }
+
+  template <DecoratorSet decorators>
+  inline void store_reduce_types(HeapWord* addr, oop value) {
+    const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP;
+    PreRuntimeDispatch::store<expanded_decorators>(addr, value);
+  }
+
+  template <DecoratorSet decorators, typename T>
+  inline T atomic_cmpxchg_reduce_types(T new_value, T* addr, T compare_value) {
+    return PreRuntimeDispatch::atomic_cmpxchg<decorators>(new_value, addr, compare_value);
+  }
+
+  template <DecoratorSet decorators>
+  inline oop atomic_cmpxchg_reduce_types(oop new_value, narrowOop* addr, oop compare_value) {
+    const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP |
+                                             INTERNAL_RT_USE_COMPRESSED_OOPS;
+    return PreRuntimeDispatch::atomic_cmpxchg<expanded_decorators>(new_value, addr, compare_value);
+  }
+
+  template <DecoratorSet decorators>
+  inline narrowOop atomic_cmpxchg_reduce_types(narrowOop new_value, narrowOop* addr, narrowOop compare_value) {
+    const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP |
+                                             INTERNAL_RT_USE_COMPRESSED_OOPS;
+    return PreRuntimeDispatch::atomic_cmpxchg<expanded_decorators>(new_value, addr, compare_value);
+  }
+
+  template <DecoratorSet decorators>
+  inline oop atomic_cmpxchg_reduce_types(oop new_value,
+                                         HeapWord* addr,
+                                         oop compare_value) {
+    const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP;
+    return PreRuntimeDispatch::atomic_cmpxchg<expanded_decorators>(new_value, addr, compare_value);
+  }
+
+  template <DecoratorSet decorators, typename T>
+  inline T atomic_xchg_reduce_types(T new_value, T* addr) {
+    const DecoratorSet expanded_decorators = decorators;
+    return PreRuntimeDispatch::atomic_xchg<expanded_decorators>(new_value, addr);
+  }
+
+  template <DecoratorSet decorators>
+  inline oop atomic_xchg_reduce_types(oop new_value, narrowOop* addr) {
+    const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP |
+                                             INTERNAL_RT_USE_COMPRESSED_OOPS;
+    return PreRuntimeDispatch::atomic_xchg<expanded_decorators>(new_value, addr);
+  }
+
+  template <DecoratorSet decorators>
+  inline narrowOop atomic_xchg_reduce_types(narrowOop new_value, narrowOop* addr) {
+    const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP |
+                                             INTERNAL_RT_USE_COMPRESSED_OOPS;
+    return PreRuntimeDispatch::atomic_xchg<expanded_decorators>(new_value, addr);
+  }
+
+  template <DecoratorSet decorators>
+  inline oop atomic_xchg_reduce_types(oop new_value, HeapWord* addr) {
+    const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP;
+    return PreRuntimeDispatch::atomic_xchg<expanded_decorators>(new_value, addr);
+  }
+
+  template <DecoratorSet decorators, typename T>
+  inline T load_reduce_types(T* addr) {
+    return PreRuntimeDispatch::load<decorators, T>(addr);
+  }
+
+  template <DecoratorSet decorators, typename T>
+  inline typename OopOrNarrowOop<T>::type load_reduce_types(narrowOop* addr) {
+    const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP |
+                                             INTERNAL_RT_USE_COMPRESSED_OOPS;
+    return PreRuntimeDispatch::load<expanded_decorators, typename OopOrNarrowOop<T>::type>(addr);
+  }
+
+  template <DecoratorSet decorators, typename T>
+  inline oop load_reduce_types(HeapWord* addr) {
+    const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP;
+    return PreRuntimeDispatch::load<expanded_decorators, oop>(addr);
+  }
+
+  template <DecoratorSet decorators, typename T>
+  inline bool arraycopy_reduce_types(arrayOop src_obj, arrayOop dst_obj, T* src, T* dst, size_t length) {
+    return PreRuntimeDispatch::arraycopy<decorators>(src_obj, dst_obj, src, dst, length);
+  }
+
+  template <DecoratorSet decorators>
+  inline bool arraycopy_reduce_types(arrayOop src_obj, arrayOop dst_obj, HeapWord* src, HeapWord* dst, size_t length) {
+    const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP;
+    return PreRuntimeDispatch::arraycopy<expanded_decorators>(src_obj, dst_obj, src, dst, length);
+  }
+
+  template <DecoratorSet decorators>
+  inline bool arraycopy_reduce_types(arrayOop src_obj, arrayOop dst_obj, narrowOop* src, narrowOop* dst, size_t length) {
+    const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP |
+                                             INTERNAL_RT_USE_COMPRESSED_OOPS;
+    return PreRuntimeDispatch::arraycopy<expanded_decorators>(src_obj, dst_obj, src, dst, length);
+  }
+
+  // Step 1: Set default decorators. This step remembers if a type was volatile
+  // and then sets the MO_VOLATILE decorator by default. Otherwise, a default
+  // memory ordering is set for the access, and the implied decorator rules
+  // are applied to select sensible defaults for decorators that have not been
+  // explicitly set. For example, default object referent strength is set to strong.
+  // This step also decays the types passed in (e.g. getting rid of CV qualifiers
+  // and references from the types). This step also perform some type verification
+  // that the passed in types make sense.
+
+  template <DecoratorSet decorators, typename T>
+  static void verify_types(){
+    // If this fails to compile, then you have sent in something that is
+    // not recognized as a valid primitive type to a primitive Access function.
+    STATIC_ASSERT((HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value || // oops have already been validated
+                   (IsPointer<T>::value || IsIntegral<T>::value) ||
+                    IsFloatingPoint<T>::value)); // not allowed primitive type
+  }
+
+  template <DecoratorSet decorators, typename P, typename T>
+  inline void store(P* addr, T value) {
+    verify_types<decorators, T>();
+    typedef typename Decay<P>::type DecayedP;
+    typedef typename Decay<T>::type DecayedT;
+    DecayedT decayed_value = value;
+    // If a volatile address is passed in but no memory ordering decorator,
+    // set the memory ordering to MO_VOLATILE by default.
+    const DecoratorSet expanded_decorators = DecoratorFixup<
+      (IsVolatile<P>::value && !HasDecorator<decorators, MO_DECORATOR_MASK>::value) ?
+      (MO_VOLATILE | decorators) : decorators>::value;
+    store_reduce_types<expanded_decorators>(const_cast<DecayedP*>(addr), decayed_value);
+  }
+
+  template <DecoratorSet decorators, typename T>
+  inline void store_at(oop base, ptrdiff_t offset, T value) {
+    verify_types<decorators, T>();
+    typedef typename Decay<T>::type DecayedT;
+    DecayedT decayed_value = value;
+    const DecoratorSet expanded_decorators = DecoratorFixup<decorators |
+                                             (HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value ?
+                                              INTERNAL_CONVERT_COMPRESSED_OOP : INTERNAL_EMPTY)>::value;
+    PreRuntimeDispatch::store_at<expanded_decorators>(base, offset, decayed_value);
+  }
+
+  template <DecoratorSet decorators, typename P, typename T>
+  inline T load(P* addr) {
+    verify_types<decorators, T>();
+    typedef typename Decay<P>::type DecayedP;
+    typedef typename Conditional<HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value,
+                                 typename OopOrNarrowOop<T>::type,
+                                 typename Decay<T>::type>::type DecayedT;
+    // If a volatile address is passed in but no memory ordering decorator,
+    // set the memory ordering to MO_VOLATILE by default.
+    const DecoratorSet expanded_decorators = DecoratorFixup<
+      (IsVolatile<P>::value && !HasDecorator<decorators, MO_DECORATOR_MASK>::value) ?
+      (MO_VOLATILE | decorators) : decorators>::value;
+    return load_reduce_types<expanded_decorators, DecayedT>(const_cast<DecayedP*>(addr));
+  }
+
+  template <DecoratorSet decorators, typename T>
+  inline T load_at(oop base, ptrdiff_t offset) {
+    verify_types<decorators, T>();
+    typedef typename Conditional<HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value,
+                                 typename OopOrNarrowOop<T>::type,
+                                 typename Decay<T>::type>::type DecayedT;
+    // Expand the decorators (figure out sensible defaults)
+    // Potentially remember if we need compressed oop awareness
+    const DecoratorSet expanded_decorators = DecoratorFixup<decorators |
+                                             (HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value ?
+                                              INTERNAL_CONVERT_COMPRESSED_OOP : INTERNAL_EMPTY)>::value;
+    return PreRuntimeDispatch::load_at<expanded_decorators, DecayedT>(base, offset);
+  }
+
+  template <DecoratorSet decorators, typename P, typename T>
+  inline T atomic_cmpxchg(T new_value, P* addr, T compare_value) {
+    verify_types<decorators, T>();
+    typedef typename Decay<P>::type DecayedP;
+    typedef typename Decay<T>::type DecayedT;
+    DecayedT new_decayed_value = new_value;
+    DecayedT compare_decayed_value = compare_value;
+    const DecoratorSet expanded_decorators = DecoratorFixup<
+      (!HasDecorator<decorators, MO_DECORATOR_MASK>::value) ?
+      (MO_SEQ_CST | decorators) : decorators>::value;
+    return atomic_cmpxchg_reduce_types<expanded_decorators>(new_decayed_value,
+                                                            const_cast<DecayedP*>(addr),
+                                                            compare_decayed_value);
+  }
+
+  template <DecoratorSet decorators, typename T>
+  inline T atomic_cmpxchg_at(T new_value, oop base, ptrdiff_t offset, T compare_value) {
+    verify_types<decorators, T>();
+    typedef typename Decay<T>::type DecayedT;
+    DecayedT new_decayed_value = new_value;
+    DecayedT compare_decayed_value = compare_value;
+    // Determine default memory ordering
+    const DecoratorSet expanded_decorators = DecoratorFixup<
+      (!HasDecorator<decorators, MO_DECORATOR_MASK>::value) ?
+      (MO_SEQ_CST | decorators) : decorators>::value;
+    // Potentially remember that we need compressed oop awareness
+    const DecoratorSet final_decorators = expanded_decorators |
+                                          (HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value ?
+                                           INTERNAL_CONVERT_COMPRESSED_OOP : INTERNAL_EMPTY);
+    return PreRuntimeDispatch::atomic_cmpxchg_at<final_decorators>(new_decayed_value, base,
+                                                                   offset, compare_decayed_value);
+  }
+
+  template <DecoratorSet decorators, typename P, typename T>
+  inline T atomic_xchg(T new_value, P* addr) {
+    verify_types<decorators, T>();
+    typedef typename Decay<P>::type DecayedP;
+    typedef typename Decay<T>::type DecayedT;
+    DecayedT new_decayed_value = new_value;
+    // atomic_xchg is only available in SEQ_CST flavour.
+    const DecoratorSet expanded_decorators = DecoratorFixup<decorators | MO_SEQ_CST>::value;
+    return atomic_xchg_reduce_types<expanded_decorators>(new_decayed_value,
+                                                         const_cast<DecayedP*>(addr));
+  }
+
+  template <DecoratorSet decorators, typename T>
+  inline T atomic_xchg_at(T new_value, oop base, ptrdiff_t offset) {
+    verify_types<decorators, T>();
+    typedef typename Decay<T>::type DecayedT;
+    DecayedT new_decayed_value = new_value;
+    // atomic_xchg is only available in SEQ_CST flavour.
+    const DecoratorSet expanded_decorators = DecoratorFixup<decorators | MO_SEQ_CST |
+                                             (HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value ?
+                                              INTERNAL_CONVERT_COMPRESSED_OOP : INTERNAL_EMPTY)>::value;
+    return PreRuntimeDispatch::atomic_xchg_at<expanded_decorators>(new_decayed_value, base, offset);
+  }
+
+  template <DecoratorSet decorators, typename T>
+  inline bool arraycopy(arrayOop src_obj, arrayOop dst_obj, T* src, T* dst, size_t length) {
+    STATIC_ASSERT((HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value ||
+                   (IsSame<T, void>::value || IsIntegral<T>::value) ||
+                    IsFloatingPoint<T>::value)); // arraycopy allows type erased void elements
+    typedef typename Decay<T>::type DecayedT;
+    const DecoratorSet expanded_decorators = DecoratorFixup<decorators | IN_HEAP_ARRAY | IN_HEAP>::value;
+    return arraycopy_reduce_types<expanded_decorators>(src_obj, dst_obj,
+                                                       const_cast<DecayedT*>(src),
+                                                       const_cast<DecayedT*>(dst),
+                                                       length);
+  }
+
+  template <DecoratorSet decorators>
+  inline void clone(oop src, oop dst, size_t size) {
+    const DecoratorSet expanded_decorators = DecoratorFixup<decorators>::value;
+    PreRuntimeDispatch::clone<expanded_decorators>(src, dst, size);
+  }
+
+  template <DecoratorSet decorators>
+  inline oop resolve(oop obj) {
+    const DecoratorSet expanded_decorators = DecoratorFixup<decorators>::value;
+    return PreRuntimeDispatch::resolve<expanded_decorators>(obj);
+  }
+
+  template <DecoratorSet decorators>
+  inline bool equals(oop o1, oop o2) {
+    const DecoratorSet expanded_decorators = DecoratorFixup<decorators>::value;
+    return PreRuntimeDispatch::equals<expanded_decorators>(o1, o2);
+  }
+}
+
+#endif // SHARE_OOPS_ACCESSBACKEND_HPP