split api call stubs into accessor and function call stubs

src/arm64/interface-descriptors-arm64.cc

Index: src/arm64/interface-descriptors-arm64.cc
diff --git a/src/arm64/interface-descriptors-arm64.cc b/src/arm64/interface-descriptors-arm64.cc
index 57eebcc3b5c078d28b55f33065ae72c5e99ac7eb..b6c957cb1fbf42323d5f7da8292c9a2ab272a1c8 100644
--- a/src/arm64/interface-descriptors-arm64.cc
+++ b/src/arm64/interface-descriptors-arm64.cc
@@ -362,6 +362,31 @@ void ApiFunctionDescriptor::Initialize(CallInterfaceDescriptorData* data) {
       x4,  // call_data
       x2,  // holder
       x1,  // api_function_address
+      x3,  // actual number of arguments
+  };
+  Representation representations[] = {
+      Representation::Tagged(),     // context
+      Representation::Tagged(),     // callee
+      Representation::Tagged(),     // call_data
+      Representation::Tagged(),     // holder
+      Representation::External(),   // api_function_address
+      Representation::Integer32(),  // actual number of arguments
+  };
+  data->Initialize(arraysize(registers), registers, representations,
+                   &default_descriptor);
+}
+
+
+void ApiAccessorDescriptor::Initialize(CallInterfaceDescriptorData* data) {
+  static PlatformInterfaceDescriptor default_descriptor =
+      PlatformInterfaceDescriptor(CAN_INLINE_TARGET_ADDRESS);
+
+  Register registers[] = {
+      cp,  // context
+      x0,  // callee
+      x4,  // call_data
+      x2,  // holder
+      x1,  // api_function_address
   };
   Representation representations[] = {
       Representation::Tagged(),    // context