class TestCase::Matrix4_16b : mulnum_t {
  has x11 : byte;
  has x21 : byte;
  has x31 : byte;
  has x41 : byte;
  has x12 : byte;
  has x22 : byte;
  has x32 : byte;
  has x42 : byte;
  has x13 : byte;
  has x23 : byte;
  has x33 : byte;
  has x43 : byte;
  has x14 : byte;
  has x24 : byte;
  has x34 : byte;
  has x44 : byte;
}