HCha/Stockfish
1
0
Fork 0
mirror of https://github.com/HChaZZY/Stockfish.git synced 2025-12-22 01:56:58 +08:00
Code Issues Packages Projects Releases Wiki Activity

Minor cleanup to recent 'Flag critical search tree in hash table' patch

Browse Source 
No functional change
This commit is contained in:
mstembera
2019-01-09 07:27:47 -08:00
committed by Stéphane Nicolet
parent d2acdac101
commit d07e782e22
2 changed files with 7 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/tt.cpp
View File

@@ -122,7 +122,7 @@ TTEntry* TranspositionTable::probe(const Key key, bool& found) const {
for (int i = 0; i < ClusterSize; ++i)
if (!tte[i].key16 || tte[i].key16 == key16)
{
tte[i].genBound8 = uint8_t(generation8 | tte[i].pv_hit() << 2 | tte[i].bound()); // Refresh
tte[i].genBound8 = uint8_t(generation8 | (tte[i].genBound8 & 0x7)); // Refresh
return found = (bool)tte[i].key16, &tte[i];
}
@@ -131,8 +131,8 @@ TTEntry* TranspositionTable::probe(const Key key, bool& found) const {
TTEntry* replace = tte;
for (int i = 1; i < ClusterSize; ++i)
// Due to our packed storage format for generation and its cyclic
// nature we add 263 (263 is the modulus plus 7 to keep the lowest
// two bound bits from affecting the result) to calculate the entry
// nature we add 263 (256 is the modulus plus 7 to keep the unrelated
// lowest three bits from affecting the result) to calculate the entry
// age correctly even after generation8 overflows into the next cycle.
if ( replace->depth8 - ((263 + generation8 - replace->genBound8) & 0xF8)
> tte[i].depth8 - ((263 + generation8 - tte[i].genBound8) & 0xF8))
@@ -150,7 +150,7 @@ int TranspositionTable::hashfull() const {
int cnt = 0;
for (int i = 0; i < 1000 / ClusterSize; ++i)
for (int j = 0; j < ClusterSize; ++j)
cnt += (table[i].entry[j].genBound8 & 0xFC) == generation8;
cnt += (table[i].entry[j].genBound8 & 0xF8) == generation8;
return cnt * 1000 / (ClusterSize * (1000 / ClusterSize));
}