Definition FT0b0(i: Z): int := GF_ops_LL.times2 (Znth i FSb).Definition FT0b1(i: Z): int := Znth i FSb.Definition FT0b2(i: Z): int := Znth i FSb.Definition FT0b3(i: Z): int := GF_ops_LL.times3 (Znth i FSb).

Lemma calc_FT2_expose_bytes: forall i, 0 <= i < 256 -> calc_FT2 i = word_to_int (FT0b2 i, FT0b3 i, FT0b0 i, FT0b1 i).