Faster implementation of Math.exp()

src/assembler.h

Index: src/assembler.h
diff --git a/src/assembler.h b/src/assembler.h
index 01f07908cc899238306b7892bad5d57caa186d80..76e0569963c9b5e7fc4eca3cb81bf9501a1c3178 100644
--- a/src/assembler.h
+++ b/src/assembler.h
@@ -604,6 +604,8 @@ class ExternalReference BASE_EMBEDDED {
   };
 
   static void SetUp();
+  static void InitializeMathExpData();
+  static void TearDownMathExpData();
 
   typedef void* ExternalReferenceRedirector(void* original, Type type);
 
@@ -725,6 +727,9 @@ class ExternalReference BASE_EMBEDDED {
   static ExternalReference math_tan_double_function(Isolate* isolate);
   static ExternalReference math_log_double_function(Isolate* isolate);
 
+  static ExternalReference math_exp_constants(int constant_index);
+  static ExternalReference math_exp_log_table();
+
   static ExternalReference page_flags(Page* page);
 
   Address address() const {return reinterpret_cast<Address>(address_);}