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Code Issues Releases Wiki Activity

Simplify away lookup_count.

Browse source 
https://tests.stockfishchess.org/tests/view/64a3c1a93ee09aa549c53167
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 32832 W: 8497 L: 8280 D: 16055
Ptnml(0-2): 80, 3544, 8967, 3729, 96

closes https://github.com/official-stockfish/Stockfish/pull/4662

No functional change
This commit is contained in:
mstembera 2023-07-03 12:59:42 -07:00 • committed by Joost VandeVondele
parent 19e2a88504
commit f8e65d82eb
1 changed files with 1 additions and 8 deletions
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9
src/nnue/layers/affine_transform_sparse_input.h
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@ -24,7 +24,6 @@
#include <iostream>
#include <algorithm>
#include <array>
#include <bitset>
#include <type_traits>
#include "../nnue_common.h"
#include "affine_transform.h"
@ -75,12 +74,6 @@ namespace Stockfish::Eval::NNUE::Layers {
}
return v;
}();
alignas(CacheLineSize) static inline const std::array<unsigned, 256> lookup_count = [](){
std::array<unsigned, 256> v;
for (int i = 0; i < 256; ++i)
v[i] = unsigned(std::bitset<8>(i).count());
return v;
}();
// Find indices of nonzero numbers in an int32_t array
template<const IndexType InputDimensions>
@ -120,7 +113,7 @@ namespace Stockfish::Eval::NNUE::Layers {
const auto lookup = (nnz >> (j * 8)) & 0xFF;
const auto offsets = _mm_loadu_si128(reinterpret_cast<const __m128i*>(&lookup_indices[lookup]));
_mm_storeu_si128(reinterpret_cast<__m128i*>(out + count), _mm_add_epi16(base, offsets));
count += lookup_count[lookup];
count += popcount(lookup);
base = _mm_add_epi16(base, increment);
}
}