From: lucasart <lucas.braesch@gmail.com>
Date: Sat, 3 Jan 2015 11:29:00 +0000 (+0800)
Subject: Remove a useless optimization
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=a6e292034a60597d8d0a3dc00e9c1eb94b1112ac;hp=c7332d5610faf6086ce0b0fe795f5ffc92cc39b0

Remove a useless optimization

This optimization is aimed at old hardware only (withouth popcount), and even on
non popcount compile (ARCH=x86-64), it provides no mesurable speedup:

stat        test     master     diff
mean   2,341,779  2,354,699  -12,920
stdev     12,910     14,770   18,150

speedup      -0.55%
P(speedup>0)  23.8%

No functional change.

Resolves #187
---

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 6a27108d..681042c7 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -534,7 +534,7 @@ namespace {
 
         b = weak & ~ei.attackedBy[Them][ALL_PIECES];
         if (b)
-            score += more_than_one(b) ? Hanging * popcount<Max15>(b) : Hanging;
+            score += Hanging * popcount<Max15>(b);
 
         b = weak & ei.attackedBy[Us][KING];
         if (b)