Extract string->double and double->string conversions for use in the preparser.

src/diy-fp.h

-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
@@ skipping 61 matching lines @@
     return result;
   }
 
   void Normalize() {
     ASSERT(f_ != 0);
     uint64_t f = f_;
     int e = e_;
 
     // This method is mainly called for normalizing boundaries. In general
     // boundaries need to be shifted by 10 bits. We thus optimize for this case.
-    const uint64_t k10MSBits = V8_2PART_UINT64_C(0xFFC00000, 00000000);
+    const uint64_t k10MSBits = static_cast<uint64_t>(0x3FF) << 54;
     while ((f & k10MSBits) == 0) {
       f <<= 10;
       e -= 10;
     }
     while ((f & kUint64MSB) == 0) {
       f <<= 1;
       e--;
     }
     f_ = f;
     e_ = e;
   }
 
   static DiyFp Normalize(const DiyFp& a) {
     DiyFp result = a;
     result.Normalize();
     return result;
   }
 
   uint64_t f() const { return f_; }
   int e() const { return e_; }
 
   void set_f(uint64_t new_value) { f_ = new_value; }
   void set_e(int new_value) { e_ = new_value; }
 
  private:
-  static const uint64_t kUint64MSB = V8_2PART_UINT64_C(0x80000000, 00000000);
+  static const uint64_t kUint64MSB = static_cast<uint64_t>(1) << 63;
 
   uint64_t f_;
   int e_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_DIY_FP_H_