Move generated math methods from platform to codegen

src/codegen.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_CODEGEN_H_
 #define V8_CODEGEN_H_
 
 #include "code-stubs.h"
 #include "runtime.h"
 
@@ skipping 81 matching lines @@
 
 // Results of the library implementation of transcendental functions may differ
 // from the one we use in our generated code.  Therefore we use the same
 // generated code both in runtime and compiled code.
 typedef double (*UnaryMathFunction)(double x);
 
 UnaryMathFunction CreateExpFunction();
 UnaryMathFunction CreateSqrtFunction();
 
 
+double modulo(double x, double y);
+
+// Custom implementation of math functions.
+double fast_exp(double input);
+double fast_sqrt(double input);
+#ifdef _WIN64
+void init_modulo_function();
+#endif
+void lazily_initialize_fast_exp();
+void init_fast_sqrt_function();
+
+
 class ElementsTransitionGenerator : public AllStatic {
  public:
   // If |mode| is set to DONT_TRACK_ALLOCATION_SITE,
   // |allocation_memento_found| may be NULL.
   static void GenerateMapChangeElementsTransition(MacroAssembler* masm,
       AllocationSiteMode mode,
       Label* allocation_memento_found);
   static void GenerateSmiToDouble(MacroAssembler* masm,
                                   AllocationSiteMode mode,
                                   Label* fail);
   static void GenerateDoubleToObject(MacroAssembler* masm,
                                      AllocationSiteMode mode,
                                      Label* fail);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ElementsTransitionGenerator);
 };
 
 static const int kNumberDictionaryProbes = 4;
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODEGEN_H_