[WIP] NumberToString operator in TF.

src/runtime/runtime.h

Index: src/runtime/runtime.h
diff --git a/src/runtime/runtime.h b/src/runtime/runtime.h
index b3bc2e29ae5c2fed62ad359d7c35c4dd3a907198..ee8061e4a0f74a63ca210c4dc13c75a8ef698b42 100644
--- a/src/runtime/runtime.h
+++ b/src/runtime/runtime.h
@@ -350,19 +350,19 @@ namespace internal {
 
 #define FOR_EACH_INTRINSIC_MATHS(F) F(GenerateRandomNumbers, 1, 1)
 
-#define FOR_EACH_INTRINSIC_NUMBERS(F)  \
-  F(IsValidSmi, 1, 1)                  \
-  F(StringToNumber, 1, 1)              \
-  F(StringParseInt, 2, 1)              \
-  F(StringParseFloat, 1, 1)            \
-  F(NumberToString, 1, 1)              \
-  F(NumberToStringSkipCache, 1, 1)     \
-  F(NumberToSmi, 1, 1)                 \
-  F(SmiLexicographicCompare, 2, 1)     \
-  F(MaxSmi, 0, 1)                      \
-  F(IsSmi, 1, 1)                       \
-  F(GetRootNaN, 0, 1)                  \
-  F(GetHoleNaNUpper, 0, 1)             \
+#define FOR_EACH_INTRINSIC_NUMBERS(F)   \
+  F(IsValidSmi, 1, 1)                   \
+  F(StringToNumber, 1, 1)               \
+  F(StringParseInt, 2, 1)               \
+  F(StringParseFloat, 1, 1)             \
+  F(NumberToString, -1 /* 1 or 2 */, 1) \
+  F(NumberToStringSkipCache, 1, 1)      \
+  F(NumberToSmi, 1, 1)                  \
+  F(SmiLexicographicCompare, 2, 1)      \
+  F(MaxSmi, 0, 1)                       \
+  F(IsSmi, 1, 1)                        \
+  F(GetRootNaN, 0, 1)                   \
+  F(GetHoleNaNUpper, 0, 1)              \
   F(GetHoleNaNLower, 0, 1)
 
 #define FOR_EACH_INTRINSIC_OBJECT(F)                 \