Introduce BUILTIN_CALL_PAIR.

src/arm/simulator-arm.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 <stdarg.h>
 #include <stdlib.h>
 #include <cmath>
 
 #if V8_TARGET_ARCH_ARM
 
@@ skipping 1915 matching lines @@
         ObjectTriple result = target(arg1, arg2, arg3, arg4, arg5);
         if (::v8::internal::FLAG_trace_sim) {
           PrintF("Returned { %p, %p, %p }\n", result.x, result.y, result.z);
         }
         // Return is passed back in address pointed to by hidden first argument.
         ObjectTriple* sim_result = reinterpret_cast<ObjectTriple*>(arg0);
         *sim_result = result;
         set_register(r0, arg0);
       } else {
         // builtin call.
-        DCHECK(redirection->type() == ExternalReference::BUILTIN_CALL);
+        DCHECK(redirection->type() == ExternalReference::BUILTIN_CALL ||
+               redirection->type() == ExternalReference::BUILTIN_CALL_PAIR);
         SimulatorRuntimeCall target =
             reinterpret_cast<SimulatorRuntimeCall>(external);
         if (::v8::internal::FLAG_trace_sim || !stack_aligned) {
           PrintF(
               "Call to host function at %p "
               "args %08x, %08x, %08x, %08x, %08x, %08x",
               FUNCTION_ADDR(target),
               arg0,
               arg1,
               arg2,
@@ skipping 2266 matching lines @@
   set_register(sp, current_sp + sizeof(uintptr_t));
   return address;
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // USE_SIMULATOR
 
 #endif  // V8_TARGET_ARCH_ARM