From: Marco Costalba <mcostalba@gmail.com>
Date: Sat, 28 Apr 2012 09:37:55 +0000 (+0100)
Subject: Micro-optimize king evaluation
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=e8d89ca5b05d64dcbf866a9d72ce6008fc449552

Micro-optimize king evaluation

Reuse already calculated value, instead of calling
king_safety() again.

Patch suggested by Balint Pfliegel.

No functional change.

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

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 6f6141ba..4865910e 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -775,7 +775,7 @@ Value do_evaluate(const Position& pos, Value& margin) {
         attackUnits =  std::min(25, (ei.kingAttackersCount[Them] * ei.kingAttackersWeight[Them]) / 2)
                      + 3 * (ei.kingAdjacentZoneAttacksCount[Them] + popcount<Max15>(undefended))
                      + InitKingDanger[relative_square(Us, ksq)]
-                     - mg_value(ei.pi->king_safety<Us>(pos, ksq)) / 32;
+                     - mg_value(score) / 32;
 
         // Analyse enemy's safe queen contact checks. First find undefended
         // squares around the king attacked by enemy queen...