Add an implementation of Nterp for x64.

And enable it on x64 when runtime and ArtMethod requirements are met
(see nterp.cc).

Test: test.py
Bug: 112676029
Change-Id: I772cd20a20fdc0ff99529df7495801d773091584
diff --git a/tools/cpp-define-generator/thread.def b/tools/cpp-define-generator/thread.def
index 72cd2a9..4fee6df 100644
--- a/tools/cpp-define-generator/thread.def
+++ b/tools/cpp-define-generator/thread.def
@@ -39,6 +39,8 @@
            art::Thread::InterpreterCacheSizeLog2())
 ASM_DEFINE(THREAD_INTERPRETER_CACHE_SIZE_MASK,
            (sizeof(art::InterpreterCache::Entry) * (art::InterpreterCache::kSize - 1)))
+ASM_DEFINE(THREAD_INTERPRETER_CACHE_SIZE_SHIFT,
+           2)
 ASM_DEFINE(THREAD_IS_GC_MARKING_OFFSET,
            art::Thread::IsGcMarkingOffset<art::kRuntimePointerSize>().Int32Value())
 ASM_DEFINE(THREAD_LOCAL_ALLOC_STACK_END_OFFSET,