xand a b = hwand a b
-functiontest :: TFVec D4 Bit -> Bit -> Bit
-functiontest = \v s -> let r = foldl xand s v in r
+functiontest :: TFVec D4 (TFVec D3 Bit) -> (TFVec D12 Bit, TFVec D3 Bit, TFVec D3 (TFVec D3 Bit))
+functiontest = \v -> let r = (concat v, head v, tail v) in r
xhwnot x = hwnot x