From: Marco Costalba <mcostalba@gmail.com>
Date: Mon, 29 Dec 2008 10:57:07 +0000 (+0100)
Subject: Micro optimization in extension()
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=d99a95df29574634146ec04a20726829681b2e23

Micro optimization in extension()

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

diff --git a/src/search.cpp b/src/search.cpp
index 2fe6a5c1..3529627f 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -2195,15 +2195,18 @@ namespace {
     if (mateThreat)
         result += MateThreatExtension[pvNode];
 
-    if (pos.move_is_pawn_push_to_7th(m))
+    if (pos.type_of_piece_on(move_from(m)) == PAWN)
     {
-        result += PawnPushTo7thExtension[pvNode];
-        *dangerous = true;
-    }
-    if (pos.move_is_passed_pawn_push(m))
-    {
-        result += PassedPawnExtension[pvNode];
-        *dangerous = true;
+        if (pos.move_is_pawn_push_to_7th(m))
+        {
+            result += PawnPushTo7thExtension[pvNode];
+            *dangerous = true;
+        }
+        if (pos.move_is_passed_pawn_push(m))
+        {
+            result += PassedPawnExtension[pvNode];
+            *dangerous = true;
+        }
     }
 
     if (   pos.move_is_capture(m)