VM_Magic.setCharAtOffset(dst, index << LOG_BYTES_IN_CHAR, value);
VM_Magic.setCharAtOffset(dst, Offset.fromIntZeroExtend(index << LOG_BYTES_IN_CHAR), value);
  public static void setArrayNoBarrier(char [] dst, int index, char value) {    if (Assert.runningVM())      VM_Magic.setCharAtOffset(dst, index << LOG_BYTES_IN_CHAR, value);    else      dst[index] = value;  }