Allow the optimizing code generator to call Math.pow with untagged doubles.

src/serialize.cc

Index: src/serialize.cc
===================================================================
--- src/serialize.cc	(revision 5940)
+++ src/serialize.cc	(working copy)
@@ -423,6 +423,10 @@
       UNCLASSIFIED,
       21,
       "mod_two_doubles");
+  Add(ExternalReference::double_fp_operation(Token::BIT_XOR).address(),
+      UNCLASSIFIED,
+      36,
+      "power_two_doubles");
   Add(ExternalReference::compare_doubles().address(),
       UNCLASSIFIED,
       22,
@@ -486,6 +490,10 @@
       UNCLASSIFIED,
       36,
       "LDoubleConstant::one_half");
+  Add(ExternalReference::address_of_negative_infinity().address(),
+      UNCLASSIFIED,
+      37,
+      "LDoubleConstant::negative_infinity");
 }