From: Marco Costalba <mcostalba@gmail.com>
Date: Thu, 28 Jan 2010 11:39:15 +0000 (+0100)
Subject: Micro optimize reduction_parameters()
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=1d7a3f26e0ac0d0dabe91806b236f4f411e6344a;hp=a0005ba45f7d5c97a096b79065c0b83ae3d81afa

Micro optimize reduction_parameters()

At ply == OnePly (common case) we avoid some useless
floating point computation.

No functional change.

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

diff --git a/src/search.cpp b/src/search.cpp
index 4e42ca31..76d05001 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -2717,7 +2717,7 @@ namespace {
       //    red = baseReduction + ln(moveCount) * ln(depth / 2) / reductionInhibitor;
       //
       logLimit = depth  > OnePly ? (1.0 - baseReduction) * reductionInhibitor / ln(depth / 2) : 1000.0;
-      gradient = ln(depth / 2) / reductionInhibitor;
+      gradient = depth  > OnePly ? ln(depth / 2) / reductionInhibitor : 0.0;
   }