From: Matthijs Kooijman <m.kooijman@student.utwente.nl>
Date: Mon, 2 Feb 2009 16:21:31 +0000 (+0100)
Subject: Add a D-Flip flop hardware model.
X-Git-Url: https://git.stderr.nl/gitweb?a=commitdiff_plain;h=171a9d286a1b4d5df44af79d67b6785620d41d5e;p=matthijs%2Fmaster-project%2Fc%CE%BBash.git

Add a D-Flip flop hardware model.
---

diff --git a/Adders.hs b/Adders.hs
index b09b98f..10590fa 100644
--- a/Adders.hs
+++ b/Adders.hs
@@ -31,6 +31,13 @@ invinv a = hwnot (hwnot a)
 dup :: Bit -> (Bit, Bit)
 dup a = (a, a)
 
+-- Not really an adder either, but a simple stateful example (D-flipflop)
+dff :: Bit -> Bit -> (Bit, Bit)
+dff d s = (s', q)
+  where
+    q = s
+    s' = d
+
 -- Combinatoric stateless no-carry adder
 -- A -> B -> S
 no_carry_adder :: (Bit, Bit) -> Bit