void quicken_jni_functions() {

  {- -------------------------------------------
  (1) 以下のような条件が成り立っている場合,
      jni_NativeInterface 内の各 Get<Primitive>Field を
      対応する JNI_FastGetField のメソッドで生成したコード片に置き換える.
      (条件が成り立っていなければ何もしない)
      ---------------------------------------- -}

      // Replace Get<Primitive>Field with fast versions
      if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
          && !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls
    #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
          // windows x86 currently needs SEH wrapper and the gain of the fast
          // versions currently isn't certain for server vm on uniprocessor.
          && os::is_MP()
    #endif
      ) {
        address func;
        func = JNI_FastGetField::generate_fast_get_boolean_field();
        if (func != (address)-1) {
          jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
        }
        func = JNI_FastGetField::generate_fast_get_byte_field();
        if (func != (address)-1) {
          jni_NativeInterface.GetByteField = (GetByteField_t)func;
        }
        func = JNI_FastGetField::generate_fast_get_char_field();
        if (func != (address)-1) {
          jni_NativeInterface.GetCharField = (GetCharField_t)func;
        }
        func = JNI_FastGetField::generate_fast_get_short_field();
        if (func != (address)-1) {
          jni_NativeInterface.GetShortField = (GetShortField_t)func;
        }
        func = JNI_FastGetField::generate_fast_get_int_field();
        if (func != (address)-1) {
          jni_NativeInterface.GetIntField = (GetIntField_t)func;
        }
        func = JNI_FastGetField::generate_fast_get_long_field();
        if (func != (address)-1) {
          jni_NativeInterface.GetLongField = (GetLongField_t)func;
        }
        func = JNI_FastGetField::generate_fast_get_float_field();
        if (func != (address)-1) {
          jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
        }
        func = JNI_FastGetField::generate_fast_get_double_field();
        if (func != (address)-1) {
          jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
        }
      }
    }