diff --git a/src/x64/interface-descriptors-x64.cc b/src/x64/interface-descriptors-x64.cc
index 79315c7..0913d1c 100644
--- a/src/x64/interface-descriptors-x64.cc
+++ b/src/x64/interface-descriptors-x64.cc
@@ -54,20 +54,6 @@
 const Register StringCompareDescriptor::RightRegister() { return rax; }
 
 
-const Register ArgumentsAccessReadDescriptor::index() { return rdx; }
-const Register ArgumentsAccessReadDescriptor::parameter_count() { return rax; }
-
-
-const Register ArgumentsAccessNewDescriptor::function() { return rdi; }
-const Register ArgumentsAccessNewDescriptor::parameter_count() { return rcx; }
-const Register ArgumentsAccessNewDescriptor::parameter_pointer() { return rdx; }
-
-
-const Register RestParamAccessDescriptor::parameter_count() { return rcx; }
-const Register RestParamAccessDescriptor::parameter_pointer() { return rdx; }
-const Register RestParamAccessDescriptor::rest_parameter_index() { return rbx; }
-
-
 const Register ApiGetterDescriptor::function_address() { return r8; }
 
 
@@ -96,6 +82,30 @@
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
+void FastNewObjectDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  Register registers[] = {rdi, rdx};
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
+void FastNewRestParameterDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  Register registers[] = {rdi};
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
+void FastNewSloppyArgumentsDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  Register registers[] = {rdi};
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
+void FastNewStrictArgumentsDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  Register registers[] = {rdi};
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
 
 void TypeofDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
@@ -121,6 +131,10 @@
 
 
 // static
+const Register ToNameDescriptor::ReceiverRegister() { return rax; }
+
+
+// static
 const Register ToObjectDescriptor::ReceiverRegister() { return rax; }
 
 
@@ -166,13 +180,6 @@
 }
 
 
-void StoreArrayLiteralElementDescriptor::InitializePlatformSpecific(
-    CallInterfaceDescriptorData* data) {
-  Register registers[] = {rcx, rax};
-  data->InitializePlatformSpecific(arraysize(registers), registers);
-}
-
-
 void CallFunctionDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {rdi};
@@ -406,6 +413,14 @@
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
+void InterpreterDispatchDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  Register registers[] = {
+      kInterpreterAccumulatorRegister, kInterpreterRegisterFileRegister,
+      kInterpreterBytecodeOffsetRegister, kInterpreterBytecodeArrayRegister,
+      kInterpreterDispatchTableRegister};
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
 
 void InterpreterPushArgsAndCallDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
@@ -417,7 +432,6 @@
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
-
 void InterpreterPushArgsAndConstructDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {
@@ -429,7 +443,6 @@
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
-
 void InterpreterCEntryDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {