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Drop KILLER_MAX. Hardcode to 2 instead.

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KILLER_MAX in search.h is quite pointless, because
we already hardcode this to 2 in MovePicker anyway.

By hard-coding this to 2 we can keep code simpler.

No functional change

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Joona Kiiski
2010-07-18 23:52:03 +03:00
committed by Marco Costalba
parent a6d13428f6
commit 66c5835080
2 changed files with 5 additions and 12 deletions
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src/search.cpp
+4 -10
View File
@@ -368,9 +368,7 @@ void SearchStack::init() {
// SearchStack::initKillers() initializes killers for a search stack entry // SearchStack::initKillers() initializes killers for a search stack entry
void SearchStack::initKillers() { void SearchStack::initKillers() {
mateKiller = MOVE_NONE; killers[0] = killers[1] = mateKiller = MOVE_NONE;
for (int i = 0; i < KILLER_MAX; i++)
killers[i] = MOVE_NONE;
} }
@@ -1872,10 +1870,8 @@ namespace {
bool move_is_killer(Move m, SearchStack* ss) { bool move_is_killer(Move m, SearchStack* ss) {
const Move* k = ss->killers; if (ss->killers[0] == m || ss->killers[1] == m)
for (int i = 0; i < KILLER_MAX; i++, k++) return true;
if (*k == m)
return true;
return false; return false;
} }
@@ -2052,9 +2048,7 @@ namespace {
if (m == ss->killers[0]) if (m == ss->killers[0])
return; return;
for (int i = KILLER_MAX - 1; i > 0; i--) ss->killers[1] = ss->killers[0];
ss->killers[i] = ss->killers[i - 1];
ss->killers[0] = m; ss->killers[0] = m;
} }
src/search.h
+1 -2
View File
@@ -36,7 +36,6 @@
const int PLY_MAX = 100; const int PLY_MAX = 100;
const int PLY_MAX_PLUS_2 = 102; const int PLY_MAX_PLUS_2 = 102;
const int KILLER_MAX = 2;
//// ////
@@ -55,7 +54,7 @@ struct SearchStack {
Move threatMove; Move threatMove;
Move excludedMove; Move excludedMove;
Move bestMove; Move bestMove;
Move killers[KILLER_MAX]; Move killers[2];
Depth reduction; Depth reduction;
Value eval; Value eval;
bool skipNullMove; bool skipNullMove;