declast_quarterround
put_unaligned_le32(declast_quarterround(w, 0, *rkp++), &out[0]);
put_unaligned_le32(declast_quarterround(w, 1, *rkp++), &out[4]);
put_unaligned_le32(declast_quarterround(w, 2, *rkp++), &out[8]);
put_unaligned_le32(declast_quarterround(w, 3, *rkp++), &out[12]);