gf_sqrn
gf_sqrn(L1, L2, 3);
gf_sqrn(L1, L0, 3);
gf_sqrn(L2, L0, 9);
gf_sqrn(L0, L2, 18);
gf_sqrn(L0, L2, 37);
gf_sqrn(L0, L1, 37);
gf_sqrn(L0, L1, 111);
gf_sqrn(L0, L1, 223);