pub fn feed_forward_kernel(state: RoundState) -> [b32; 16]Expand description
Applies BLAKE3’s final XORs, without any additional registered transfer.
Input: the state leaving the last stage. Output: the 16 result words,
out[i] = v[i] ⊕ v[i+8] and out[i+8] = v[i+8] ⊕ cv[i] for i < 8.
Combinational, on the output side of the last register.