Revert "Do away with variable length memcpy to Set/Get registers in simulator"

src/utils.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_UTILS_H_
 #define V8_UTILS_H_
 
 #include <limits.h>
 #include <stdlib.h>
 #include <string.h>
@@ skipping 215 matching lines @@
   return a < 0 ? a : -a;
 }
 
 
 // TODO(svenpanne) Clean up the whole power-of-2 mess.
 inline int32_t WhichPowerOf2Abs(int32_t x) {
   return (x == kMinInt) ? 31 : WhichPowerOf2(Abs(x));
 }
 
 
-// Obtains the unsigned type corresponding to T
-// available in C++11 as std::make_unsigned
-template<typename T>
-struct make_unsigned {
-  typedef T type;
-};
-
-
-// Template specializations necessary to have make_unsigned work
-template<> struct make_unsigned<int32_t> {
-  typedef uint32_t type;
-};
-
-
-template<> struct make_unsigned<int64_t> {
-  typedef uint64_t type;
-};
-
-
 // ----------------------------------------------------------------------------
 // BitField is a help template for encoding and decode bitfield with
 // unsigned content.
 
 template<class T, int shift, int size, class U>
 class BitFieldBase {
  public:
   // A type U mask of bit field.  To use all bits of a type U of x bits
   // in a bitfield without compiler warnings we have to compute 2^x
   // without using a shift count of x in the computation.
@@ skipping 1222 matching lines @@
   // Add formatted contents like printf based on a va_list.
   void AddFormattedList(const char* format, va_list list);
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(StringBuilder);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_UTILS_H_