Introduce BUILTIN_CALL_PAIR.

src/arm64/simulator-arm64.cc

 // Copyright 2013 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 <stdlib.h>
 #include <cmath>
 #include <cstdarg>
 
 #if V8_TARGET_ARCH_ARM64
 
@@ skipping 571 matching lines @@
     TraceSim("  with unaligned stack 0x%016" PRIx64 ".\n", sp());
     FATAL("ALIGNMENT EXCEPTION");
   }
 
   switch (redirection->type()) {
     default:
       TraceSim("Type: Unknown.\n");
       UNREACHABLE();
       break;
 
-    case ExternalReference::BUILTIN_CALL: {
+    case ExternalReference::BUILTIN_CALL:
+    case ExternalReference::BUILTIN_CALL_PAIR: {
       // Object* f(v8::internal::Arguments) or
       // ObjectPair f(v8::internal::Arguments).
       TraceSim("Type: BUILTIN_CALL\n");
       SimulatorRuntimeCall target =
         reinterpret_cast<SimulatorRuntimeCall>(external);
 
       // We don't know how many arguments are being passed, but we can
       // pass 8 without touching the stack. They will be ignored by the
       // host function if they aren't used.
       TraceSim("Arguments: "
@@ skipping 3263 matching lines @@
   delete[] format;
 }
 
 
 #endif  // USE_SIMULATOR
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64