x25519_ge_p3_to_cached
x25519_ge_p3_to_cached(&mask_cached, &mask);
x25519_ge_p3_to_cached(&peers_mask_cached, &peers_mask);
x25519_ge_p3_to_cached(r, &t);
x25519_ge_p3_to_cached(&cached, h);
x25519_ge_p3_to_cached(&Ai[1], A);