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Use incremental updates more often

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Use incremental updates for accumulators for up to 2 plies.
Do not copy accumulator. About 2% speedup.

Passed STC:
LLR: 2.95 (-2.94,2.94) {-0.25,1.25}
Total: 21752 W: 2583 L: 2403 D: 16766
Ptnml(0-2): 128, 1761, 6923, 1931, 133
https://tests.stockfishchess.org/tests/view/5f7150cf3b22d6afa5069412

closes https://github.com/official-stockfish/Stockfish/pull/3157

No functional change
This commit is contained in:
noobpwnftw
2020-09-28 02:29:21 +08:00
committed by Joost VandeVondele
parent 1dbd2a1ad5
commit c065abdcaf
4 changed files with 87 additions and 30 deletions
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3
src/nnue/features/half_kp.cpp
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@@ -52,11 +52,10 @@ namespace Eval::NNUE::Features {
// Get a list of indices for recently changed features
template <Side AssociatedKing>
void HalfKP<AssociatedKing>::AppendChangedIndices(
const Position& pos, Color perspective,
const Position& pos, const DirtyPiece& dp, Color perspective,
IndexList* removed, IndexList* added) {
Square ksq = orient(perspective, pos.square<KING>(perspective));
const auto& dp = pos.state()->dirtyPiece;
for (int i = 0; i < dp.dirty_num; ++i) {
Piece pc = dp.piece[i];
if (type_of(pc) == KING) continue;