From: Marco Costalba <mcostalba@gmail.com>
Date: Fri, 7 Jan 2011 10:10:20 +0000 (+0100)
Subject: Use a 32 bit bitwise 'and' in SimpleHash lookup
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=dcbc8a7e7584511fe31db94c1b011e9ab541ca21;p=fairystockfish.git

Use a 32 bit bitwise 'and' in SimpleHash lookup

A bit faster on 32 bits machines, more similar to
TranspositionTable::first_entry() and same result.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
---

diff --git a/src/tt.h b/src/tt.h
index f2928fb..d7f57cc 100644
--- a/src/tt.h
+++ b/src/tt.h
@@ -60,7 +60,7 @@ public:
 
   ~SimpleHash() { delete [] entries; }
 
-  Entry* find(Key key) const { return entries + unsigned(key & (HashSize - 1)); }
+  Entry* find(Key key) const { return entries + ((uint32_t)key & (HashSize - 1)); }
 
 protected:
   Entry* entries;