Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
- Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
+ Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
void TTEntry::save(Key k, Value v, bool pv, Bound b, Depth d, Move m, Value ev) {
- assert(d / ONE_PLY * ONE_PLY == d);
-
// Preserve any existing move for the same position
if (m || (k >> 48) != key16)
move16 = (uint16_t)m;
// Overwrite less valuable entries
if ( (k >> 48) != key16
- || d / ONE_PLY + 10 > depth8
+ || d - DEPTH_OFFSET > depth8 - 4
|| b == BOUND_EXACT)
{
+ assert(d >= DEPTH_OFFSET);
+
key16 = (uint16_t)(k >> 48);
value16 = (int16_t)v;
eval16 = (int16_t)ev;
genBound8 = (uint8_t)(TT.generation8 | uint8_t(pv) << 2 | b);
- assert((d - DEPTH_NONE) / ONE_PLY >= 0);
- depth8 = (uint8_t)((d - DEPTH_NONE) / ONE_PLY);
+ depth8 = (uint8_t)(d - DEPTH_OFFSET);
}
}