Move generated math methods from platform to codegen

src/platform.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.
 
 // This module contains the platform-specific code. This make the rest of the
 // code less dependent on operating system, compilers and runtime libraries.
 // This module does specifically not deal with differences between different
 // processor architecture.
 // The platform classes have the same definition for all platforms. The
 // implementation for a particular platform is put in platform_<os>.cc.
@@ skipping 55 matching lines @@
 #endif
   return intgr;
 }
 #endif  // _MSC_VER < 1800
 
 #endif  // V8_LIBC_MSVCRT
 
 namespace v8 {
 namespace internal {
 
-double modulo(double x, double y);
-
-// Custom implementation of math functions.
-double fast_exp(double input);
-double fast_sqrt(double input);
-// The custom exp implementation needs 16KB of lookup data; initialize it
-// on demand.
-void lazily_initialize_fast_exp();
-
-
 // ----------------------------------------------------------------------------
 // Fast TLS support
 
 #ifndef V8_NO_FAST_TLS
 
 #if defined(_MSC_VER) && V8_HOST_ARCH_IA32
 
 #define V8_FAST_TLS_SUPPORTED 1
 
 INLINE(intptr_t InternalGetExistingThreadLocal(intptr_t index));
@@ skipping 499 matching lines @@
   char name_[kMaxThreadNameLength];
   int stack_size_;
   Semaphore* start_semaphore_;
 
   DISALLOW_COPY_AND_ASSIGN(Thread);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PLATFORM_H_