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Ensure that rootDepth < DEPTH_MAX

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Indeed, if we use a depth >= DEPTH_MAX, we start having negative depth in the
TT (due to int8_t cast).

No functional change in single thread mode

Resolves #490
This commit is contained in:
lucasart 2015-11-07 12:19:13 +08:00 • committed by Joona Kiiski
parent 9c9205860c
commit e6eeb17aa6
1 changed files with 2 additions and 2 deletions
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4
src/search.cpp
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@ -386,7 +386,7 @@ void Thread::search(bool isMainThread) {
{
// Set up the new depth for the helper threads
if (!isMainThread)
rootDepth = Threads.main()->rootDepth + Depth(int(2.2 * log(1 + this->idx)));
rootDepth = std::min(DEPTH_MAX - ONE_PLY, Threads.main()->rootDepth + Depth(int(2.2 * log(1 + this->idx))));
// Age out PV variability metric
if (isMainThread)
@ -562,7 +562,7 @@ namespace {
assert(-VALUE_INFINITE <= alpha && alpha < beta && beta <= VALUE_INFINITE);
assert(PvNode || (alpha == beta - 1));
assert(depth > DEPTH_ZERO);
assert(DEPTH_ZERO < depth && depth < DEPTH_MAX);
Move pv[MAX_PLY+1], quietsSearched[64];
StateInfo st;