From c7d0d7c3b6cf4825947e56dfd69531be4b7f28c3 Mon Sep 17 00:00:00 2001
From: Mattias Andrée <maandree@operamail.com>
Date: Mon, 4 Feb 2013 02:45:49 +0100
Subject: small rotation optimisation
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Signed-off-by: Mattias Andrée <maandree@operamail.com>
---
 sha3sum.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sha3sum.py b/sha3sum.py
index 35b71dd..b79c4d4 100755
--- a/sha3sum.py
+++ b/sha3sum.py
@@ -85,7 +85,8 @@ class SHA3:
         @param   n:int  Rotation steps
         @return   :int  The value rotated
         '''
-        return ((x >> (SHA3.w - (n % SHA3.w))) + (x << (n % SHA3.w))) & SHA3.wmod
+        m = n % SHA3.w
+        return ((x >> (SHA3.w - m)) + (x << m)) & SHA3.wmod
     
     
     @staticmethod
-- 
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