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Cleanup, fix style issues

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use naming convention for variables, functions, constants

closes https://github.com/official-stockfish/Stockfish/pull/6416

no functional change
This commit is contained in:
Shawn Xu
2025-11-14 17:29:01 +01:00
committed by Joost VandeVondele
parent 7b7a9485d6
commit bd82b9e01f
2 changed files with 39 additions and 38 deletions
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src/nnue/nnue_accumulator.cpp
+19 -18
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@@ -636,25 +636,26 @@ void update_accumulator_incremental(
(target_state.template acc<TransformedFeatureDimensions>()).computed[Perspective] = true;
}
Bitboard get_changed_pieces(const Piece old[SQUARE_NB], const Piece new_[SQUARE_NB]) {
Bitboard get_changed_pieces(const Piece oldPieces[SQUARE_NB], const Piece newPieces[SQUARE_NB]) {
#if defined(USE_AVX512) || defined(USE_AVX2)
static_assert(sizeof(Piece) == 1);
Bitboard same_bb = 0;
Bitboard sameBB = 0;
for (int i = 0; i < 64; i += 32)
{
const __m256i old_v = _mm256_loadu_si256(reinterpret_cast<const __m256i*>(old + i));
const __m256i new_v = _mm256_loadu_si256(reinterpret_cast<const __m256i*>(new_ + i));
const __m256i cmp_equal = _mm256_cmpeq_epi8(old_v, new_v);
const std::uint32_t equal_mask = _mm256_movemask_epi8(cmp_equal);
same_bb |= static_cast<Bitboard>(equal_mask) << i;
const __m256i old_v = _mm256_loadu_si256(reinterpret_cast<const __m256i*>(oldPieces + i));
const __m256i new_v = _mm256_loadu_si256(reinterpret_cast<const __m256i*>(newPieces + i));
const __m256i cmpEqual = _mm256_cmpeq_epi8(old_v, new_v);
const std::uint32_t equalMask = _mm256_movemask_epi8(cmpEqual);
sameBB |= static_cast<Bitboard>(equalMask) << i;
}
return ~same_bb;
return ~sameBB;
#else
Bitboard changed = 0;
for (Square sq = SQUARE_ZERO; sq < SQUARE_NB; ++sq)
{
changed |= static_cast<Bitboard>(old[sq] != new_[sq]) << sq;
}
changed |= static_cast<Bitboard>(oldPieces[sq] != newPieces[sq]) << sq;
return changed;
#endif
}
@@ -671,18 +672,18 @@ void update_accumulator_refresh_cache(const FeatureTransformer<Dimensions>& feat
auto& entry = cache[ksq][Perspective];
PSQFeatureSet::IndexList removed, added;
const Bitboard changed_bb = get_changed_pieces(entry.pieces, pos.piece_array().data());
Bitboard removed_bb = changed_bb & entry.pieceBB;
Bitboard added_bb = changed_bb & pos.pieces();
const Bitboard changedBB = get_changed_pieces(entry.pieces, pos.piece_array().data());
Bitboard removedBB = changedBB & entry.pieceBB;
Bitboard addedBB = changedBB & pos.pieces();
while (removed_bb)
while (removedBB)
{
Square sq = pop_lsb(removed_bb);
Square sq = pop_lsb(removedBB);
removed.push_back(PSQFeatureSet::make_index<Perspective>(sq, entry.pieces[sq], ksq));
}
while (added_bb)
while (addedBB)
{
Square sq = pop_lsb(added_bb);
Square sq = pop_lsb(addedBB);
added.push_back(PSQFeatureSet::make_index<Perspective>(sq, pos.piece_on(sq), ksq));
}