From 14aebe2b7ce1fa3ba7570168115ac3b0077ea97a Mon Sep 17 00:00:00 2001
From: Marco Costalba <mcostalba@gmail.com>
Date: Thu, 26 Dec 2013 12:08:23 +0100
Subject: [PATCH] Further simplify previous patch

Use a single XOR instead of NEGATE + AND

No functional change.
---
 src/pawns.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/pawns.cpp b/src/pawns.cpp
index 39bd689f..5c7a55be 100644
--- a/src/pawns.cpp
+++ b/src/pawns.cpp
@@ -188,7 +188,7 @@ namespace {
     // to file distance between left and right outermost pawns.
     if (pos.count<PAWN>(Us) > 1)
     {
-        b = ~e->semiopenFiles[Us] & 0xFF;
+        b = e->semiopenFiles[Us] ^ 0xFF;
         value += PawnsFileSpan * int(msb(b) - lsb(b));
     }
 
-- 
2.39.2