From: Matthijs Kooijman <m.kooijman@student.utwente.nl>
Date: Thu, 29 Jan 2009 16:43:10 +0000 (+0100)
Subject: Make full_adder simpler.
X-Git-Url: https://git.stderr.nl/gitweb?a=commitdiff_plain;h=1e7d79de8b34aca4bf0f63d3822dd0b018356038;p=matthijs%2Fmaster-project%2Fc%CE%BBash.git

Make full_adder simpler.
---

diff --git a/Adders.hs b/Adders.hs
index 03f0410..71d38dc 100644
--- a/Adders.hs
+++ b/Adders.hs
@@ -42,8 +42,9 @@ half_adder (a, b) =
 full_adder :: (Bit, Bit, Bit) -> (Bit, Bit)
 full_adder (a, b, cin) = (s, c)
   where
-    s = a `hwxor` b `hwxor` cin
-    c = a `hwand` b `hwor` (cin `hwand` (a `hwxor` b))
+    x = a `hwxor` b
+    s = x `hwxor` cin
+    c = a `hwand` b `hwor` (cin `hwand` x)
 
 -- Four bit adder
 -- Explicit version