Reintroduce %GetRootNaN to fix MIPS.

src/runtime/runtime.h

 // 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.
 
 #ifndef V8_RUNTIME_RUNTIME_H_
 #define V8_RUNTIME_RUNTIME_H_
 
 #include "src/allocation.h"
 #include "src/objects.h"
 #include "src/zone.h"
@@ skipping 362 matching lines @@
   F(NumberXor, 2, 1)                   \
   F(NumberShl, 2, 1)                   \
   F(NumberShr, 2, 1)                   \
   F(NumberSar, 2, 1)                   \
   F(NumberEquals, 2, 1)                \
   F(NumberCompare, 3, 1)               \
   F(SmiLexicographicCompare, 2, 1)     \
   F(MaxSmi, 0, 1)                      \
   F(NumberToString, 1, 1)              \
   F(IsSmi, 1, 1)                       \
-  F(IsNonNegativeSmi, 1, 1)
+  F(IsNonNegativeSmi, 1, 1)            \
+  F(GetRootNaN, 0, 1)
 
 
 #define FOR_EACH_INTRINSIC_OBJECT(F)                 \
   F(GetPrototype, 1, 1)                              \
   F(InternalSetPrototype, 2, 1)                      \
   F(SetPrototype, 2, 1)                              \
   F(IsInPrototypeChain, 2, 1)                        \
   F(GetOwnProperty, 2, 1)                            \
   F(PreventExtensions, 1, 1)                         \
   F(IsExtensible, 1, 1)                              \
@@ skipping 464 matching lines @@
 
 class DeclareGlobalsEvalFlag : public BitField<bool, 0, 1> {};
 class DeclareGlobalsNativeFlag : public BitField<bool, 1, 1> {};
 STATIC_ASSERT(LANGUAGE_END == 3);
 class DeclareGlobalsLanguageMode : public BitField<LanguageMode, 2, 2> {};
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_RUNTIME_RUNTIME_H_