Revert of [builtins] Introduce proper Float64Exp operator.

src/assembler.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 879 matching lines @@
     // void f(Local<Name> property, PropertyCallbackInfo& info)
     DIRECT_GETTER_CALL,
 
     // Call to accessor getter callback via InvokeAccessorGetterCallback.
     // void f(Local<Name> property, PropertyCallbackInfo& info,
     //     AccessorNameGetterCallback callback)
     PROFILING_GETTER_CALL
   };
 
   static void SetUp();
+  static void InitializeMathExpData();
+  static void TearDownMathExpData();
 
   typedef void* ExternalReferenceRedirector(Isolate* isolate, void* original,
                                             Type type);
 
   ExternalReference() : address_(NULL) {}
 
   ExternalReference(Builtins::CFunctionId id, Isolate* isolate);
 
   ExternalReference(ApiFunction* ptr, Type type, Isolate* isolate);
 
@@ skipping 125 matching lines @@
   static ExternalReference address_of_min_int();
   static ExternalReference address_of_one_half();
   static ExternalReference address_of_minus_one_half();
   static ExternalReference address_of_negative_infinity();
   static ExternalReference address_of_the_hole_nan();
   static ExternalReference address_of_uint32_bias();
 
   // IEEE 754 functions.
   static ExternalReference ieee754_atan_function(Isolate* isolate);
   static ExternalReference ieee754_atan2_function(Isolate* isolate);
-  static ExternalReference ieee754_exp_function(Isolate* isolate);
   static ExternalReference ieee754_log_function(Isolate* isolate);
   static ExternalReference ieee754_log1p_function(Isolate* isolate);
   static ExternalReference ieee754_log2_function(Isolate* isolate);
   static ExternalReference ieee754_log10_function(Isolate* isolate);
 
+  static ExternalReference math_exp_constants(int constant_index);
+  static ExternalReference math_exp_log_table();
+
   static ExternalReference page_flags(Page* page);
 
   static ExternalReference ForDeoptEntry(Address entry);
 
   static ExternalReference cpu_features();
 
   static ExternalReference is_tail_call_elimination_enabled_address(
       Isolate* isolate);
 
   static ExternalReference debug_is_active_address(Isolate* isolate);
@@ skipping 285 matching lines @@
     std::vector<ConstantPoolEntry> shared_entries;
   };
 
   Label emitted_label_;  // Records pc_offset of emitted pool
   PerTypeEntryInfo info_[ConstantPoolEntry::NUMBER_OF_TYPES];
 };
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_ASSEMBLER_H_