BN_mod_lshift1_quick
if (!BN_mod_lshift1_quick(t, A, p))
if (!BN_mod_lshift1_quick(tmp2, x, group->field))
if (!BN_mod_lshift1_quick(tmp, Z4, p))
|| !BN_mod_lshift1_quick(t5, t5, group->field)
|| !BN_mod_lshift1_quick(t1, t1, group->field)
|| !BN_mod_lshift1_quick(t4, p->Y, group->field)
|| !BN_mod_lshift1_quick(t1, group->b, group->field)
if (!BN_mod_lshift1_quick(n0, r->X, p))
if (!BN_mod_lshift1_quick(n1, n0, p))
if (!BN_mod_lshift1_quick(n0, n1, p))
if (!BN_mod_lshift1_quick(n1, n0, p))
if (!BN_mod_lshift1_quick(r->Z, n0, p))
if (!BN_mod_lshift1_quick(n0, n2, p))
int BN_mod_lshift1_quick(BIGNUM *r, const BIGNUM *a, const BIGNUM *m);