X-Git-Url: https://git.stderr.nl/gitweb?a=blobdiff_plain;f=Adders.hs;h=ac93a3366db359f3fc368467fe7280320aece926;hb=0082f01a853476cdcec0e73bacf8c0d4508dbec0;hp=ce261668e48eb7a9afd5a8e05ddb4bd31f65edf0;hpb=994e86628e807bd8f9f07482ec46b44446d17aa9;p=matthijs%2Fmaster-project%2Fc%CE%BBash.git

diff --git a/Adders.hs b/Adders.hs
index ce26166..ac93a33 100644
--- a/Adders.hs
+++ b/Adders.hs
@@ -39,6 +39,14 @@ dff d s = (s', q)
     q = s
     s' = d
 
+type ShifterState = (Bit, Bit, Bit, Bit)
+shifter :: Bit -> ShifterState -> (ShifterState, Bit)
+shifter a s =
+  (s', o)
+  where
+    s' = (a, b, c, d)
+    (b, c, d, o) = s
+
 -- Combinatoric stateless no-carry adder
 -- A -> B -> S
 no_carry_adder :: (Bit, Bit) -> Bit