public static function set_cpu_feature_flags()
 {
     $flags = explode(' ', self::read_cpuinfo_line('flags'));
     self::$cpu_flags = 0;
     foreach (self::get_cpu_feature_constants() as $feature => $value) {
         if (in_array($feature, $flags)) {
             // The feature is supported on the CPU
             self::$cpu_flags |= $value;
         }
     }
 }