Reintroduce %GetRootNaN to fix MIPS.

R=dusan.milosavljevic@imgtec.com

Review URL: https://codereview.chromium.org/1101503003

Cr-Commit-Position: refs/heads/master@{#27967}

src/macros.py

@@ -169,7 +169,7 @@ macro SET_PRIVATE(obj, sym, val) = (obj[sym] = val);
 macro DELETE_PRIVATE(obj, sym) = (delete obj[sym]);
 
 # Constants.  The compiler constant folds them.
-const NAN = (0/0);
+const NAN = $NaN;
 const INFINITY = (1/0);
 const UNDEFINED = (void 0);
 

src/runtime.js

@@ -22,6 +22,7 @@ var $String = global.String;
 var $Number = global.Number;
 var $Function = global.Function;
 var $Boolean = global.Boolean;
+var $NaN = %GetRootNaN();
 
 // ECMA-262 Section 11.9.3.
 function EQUALS(y) {

src/runtime/runtime-numbers.cc

@@ -579,5 +579,12 @@ RUNTIME_FUNCTION(Runtime_IsNonNegativeSmi) {
   return isolate->heap()->ToBoolean(obj->IsSmi() &&
                                     Smi::cast(obj)->value() >= 0);
 }
+
+
+RUNTIME_FUNCTION(Runtime_GetRootNaN) {
+  SealHandleScope shs(isolate);
+  DCHECK(args.length() == 0);
+  return isolate->heap()->nan_value();
+}
 }
 }  // namespace v8::internal

src/runtime/runtime.h

@@ -380,7 +380,8 @@ namespace internal {
   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)                 \