From 0ff06f408c6e6f48bd3c844bddff10fe1b180290 Mon Sep 17 00:00:00 2001
From: Paul Selkirk <paul@psgd.org>
Date: Sat, 10 Mar 2018 08:10:12 -0500
Subject: Fix coef4, which was swapping digits

---
 hashsig.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/hashsig.c b/hashsig.c
index 13f20c6..e32358d 100644
--- a/hashsig.c
+++ b/hashsig.c
@@ -284,10 +284,7 @@ static uint8_t coef2(const uint8_t * const S, const size_t i)
 /* w = 4 */
 static uint8_t coef4(const uint8_t * const S, const size_t i)
 {
-    uint8_t byte = S[i/2];
-    if (i % 2)
-        byte >>= 4;
-    return byte & 0x0f;
+    return (S[i/2] >> (4 - (4 * (i % 2)))) & 0x0f;
 }
 
 /* w = 8 */
-- 
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