[runtime] Implement %_ToLength via ToLengthStub.

src/arm64/interface-descriptors-arm64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/arm64/interface-descriptors-arm64.h"
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/interface-descriptors.h"
 
@@ skipping 85 matching lines @@
 
 void ToNumberDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // x0: value
   Register registers[] = {x0};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 // static
+const Register ToLengthDescriptor::ReceiverRegister() { return x0; }
+
+
+// static
 const Register ToStringDescriptor::ReceiverRegister() { return x0; }
 
 
 // static
 const Register ToObjectDescriptor::ReceiverRegister() { return x0; }
 
 
 void NumberToStringDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // x0: value
@@ skipping 360 matching lines @@
       x1    // the runtime function to call
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64