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;
}