291     if (BN_is_zero(a)) {  in ossl_ec_GFp_simple_group_check_discriminant()
292         if (BN_is_zero(b))  in ossl_ec_GFp_simple_group_check_discriminant()
294     } else if (!BN_is_zero(b)) {  in ossl_ec_GFp_simple_group_check_discriminant()
311         if (BN_is_zero(a))  in ossl_ec_GFp_simple_group_check_discriminant()
710     if (BN_is_zero(n5)) {  in ossl_ec_GFp_simple_add()
711         if (BN_is_zero(n6)) {  in ossl_ec_GFp_simple_add()
943     if (EC_POINT_is_at_infinity(group, point) || BN_is_zero(point->Y))  in ossl_ec_GFp_simple_invert()
953     return BN_is_zero(point->Z);  in ossl_ec_GFp_simple_is_at_infinity()
1244     if (!BN_is_zero(points[0]->Z)) {  in ossl_ec_GFp_simple_points_make_affine()
1258         if (!BN_is_zero(points[i]->Z)) {  in ossl_ec_GFp_simple_points_make_affine()
1295         if (!BN_is_zero(points[i]->Z)) {  in ossl_ec_GFp_simple_points_make_affine()
1314     if (!BN_is_zero(points[0]->Z)) {  in ossl_ec_GFp_simple_points_make_affine()
1325         if (!BN_is_zero(p->Z)) {  in ossl_ec_GFp_simple_points_make_affine()
1401     } while (BN_is_zero(e));  in ossl_ec_GFp_simple_field_inv()
1458     } while (BN_is_zero(lambda));  in ossl_ec_GFp_simple_blind_coordinates()
1524     } while (BN_is_zero(r->Y));  in ossl_ec_GFp_simple_ladder_pre()
1530     } while (BN_is_zero(s->Z));  in ossl_ec_GFp_simple_ladder_pre()
1658     if (BN_is_zero(r->Z))  in ossl_ec_GFp_simple_ladder_post()
1661     if (BN_is_zero(s->Z)) {  in ossl_ec_GFp_simple_ladder_post()