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

src/utils.h

Index: src/utils.h
diff --git a/src/utils.h b/src/utils.h
index 8acb6d4775d6cc011387cb1e50cfcf7a1e1d3e99..115f7847584d07d7b476131dc44de4181e14ba61 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -233,25 +233,6 @@ inline int32_t WhichPowerOf2Abs(int32_t 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.