#include <cstring>
#include <iostream>
+#include "../misc.h" // for IsLittleEndian
+
#if defined(USE_AVX2)
#include <immintrin.h>
#include <arm_neon.h>
#endif
-namespace Eval::NNUE {
+namespace Stockfish::Eval::NNUE {
// Version of the evaluation file
- constexpr std::uint32_t kVersion = 0x7AF32F16u;
+ constexpr std::uint32_t Version = 0x7AF32F20u;
// Constant used in evaluation value calculation
- constexpr int FV_SCALE = 16;
- constexpr int kWeightScaleBits = 6;
+ constexpr int OutputScale = 16;
+ constexpr int WeightScaleBits = 6;
// Size of cache line (in bytes)
- constexpr std::size_t kCacheLineSize = 64;
+ constexpr std::size_t CacheLineSize = 64;
// SIMD width (in bytes)
#if defined(USE_AVX2)
- constexpr std::size_t kSimdWidth = 32;
+ constexpr std::size_t SimdWidth = 32;
#elif defined(USE_SSE2)
- constexpr std::size_t kSimdWidth = 16;
+ constexpr std::size_t SimdWidth = 16;
#elif defined(USE_MMX)
- constexpr std::size_t kSimdWidth = 8;
+ constexpr std::size_t SimdWidth = 8;
#elif defined(USE_NEON)
- constexpr std::size_t kSimdWidth = 16;
+ constexpr std::size_t SimdWidth = 16;
#endif
- constexpr std::size_t kMaxSimdWidth = 32;
-
- // unique number for each piece type on each square
- enum {
- PS_NONE = 0,
- PS_W_PAWN = 1,
- PS_B_PAWN = 1 * SQUARE_NB + 1,
- PS_W_KNIGHT = 2 * SQUARE_NB + 1,
- PS_B_KNIGHT = 3 * SQUARE_NB + 1,
- PS_W_BISHOP = 4 * SQUARE_NB + 1,
- PS_B_BISHOP = 5 * SQUARE_NB + 1,
- PS_W_ROOK = 6 * SQUARE_NB + 1,
- PS_B_ROOK = 7 * SQUARE_NB + 1,
- PS_W_QUEEN = 8 * SQUARE_NB + 1,
- PS_B_QUEEN = 9 * SQUARE_NB + 1,
- PS_W_KING = 10 * SQUARE_NB + 1,
- PS_END = PS_W_KING, // pieces without kings (pawns included)
- PS_B_KING = 11 * SQUARE_NB + 1,
- PS_END2 = 12 * SQUARE_NB + 1
- };
-
- constexpr uint32_t kpp_board_index[COLOR_NB][PIECE_NB] = {
- // convention: W - us, B - them
- // viewed from other side, W and B are reversed
- { PS_NONE, PS_W_PAWN, PS_W_KNIGHT, PS_W_BISHOP, PS_W_ROOK, PS_W_QUEEN, PS_W_KING, PS_NONE,
- PS_NONE, PS_B_PAWN, PS_B_KNIGHT, PS_B_BISHOP, PS_B_ROOK, PS_B_QUEEN, PS_B_KING, PS_NONE },
- { PS_NONE, PS_B_PAWN, PS_B_KNIGHT, PS_B_BISHOP, PS_B_ROOK, PS_B_QUEEN, PS_B_KING, PS_NONE,
- PS_NONE, PS_W_PAWN, PS_W_KNIGHT, PS_W_BISHOP, PS_W_ROOK, PS_W_QUEEN, PS_W_KING, PS_NONE }
- };
+ constexpr std::size_t MaxSimdWidth = 32;
// Type of input feature after conversion
using TransformedFeatureType = std::uint8_t;
// Round n up to be a multiple of base
template <typename IntType>
- constexpr IntType CeilToMultiple(IntType n, IntType base) {
+ constexpr IntType ceil_to_multiple(IntType n, IntType base) {
return (n + base - 1) / base * base;
}
// necessary to return a result with the byte ordering of the compiling machine.
template <typename IntType>
inline IntType read_little_endian(std::istream& stream) {
-
IntType result;
- std::uint8_t u[sizeof(IntType)];
- typename std::make_unsigned<IntType>::type v = 0;
- stream.read(reinterpret_cast<char*>(u), sizeof(IntType));
- for (std::size_t i = 0; i < sizeof(IntType); ++i)
- v = (v << 8) | u[sizeof(IntType) - i - 1];
+ if (IsLittleEndian)
+ stream.read(reinterpret_cast<char*>(&result), sizeof(IntType));
+ else
+ {
+ std::uint8_t u[sizeof(IntType)];
+ typename std::make_unsigned<IntType>::type v = 0;
+
+ stream.read(reinterpret_cast<char*>(u), sizeof(IntType));
+ for (std::size_t i = 0; i < sizeof(IntType); ++i)
+ v = (v << 8) | u[sizeof(IntType) - i - 1];
+
+ std::memcpy(&result, &v, sizeof(IntType));
+ }
- std::memcpy(&result, &v, sizeof(IntType));
return result;
}
-} // namespace Eval::NNUE
+ // write_little_endian() is our utility to write an integer (signed or unsigned, any size)
+ // to a stream in little-endian order. We swap the byte order before the write if
+ // necessary to always write in little endian order, independently of the byte
+ // ordering of the compiling machine.
+ template <typename IntType>
+ inline void write_little_endian(std::ostream& stream, IntType value) {
+
+ if (IsLittleEndian)
+ stream.write(reinterpret_cast<const char*>(&value), sizeof(IntType));
+ else
+ {
+ std::uint8_t u[sizeof(IntType)];
+ typename std::make_unsigned<IntType>::type v = value;
+
+ std::size_t i = 0;
+ // if constexpr to silence the warning about shift by 8
+ if constexpr (sizeof(IntType) > 1)
+ {
+ for (; i + 1 < sizeof(IntType); ++i)
+ {
+ u[i] = v;
+ v >>= 8;
+ }
+ }
+ u[i] = v;
+
+ stream.write(reinterpret_cast<char*>(u), sizeof(IntType));
+ }
+ }
+
+ // read_little_endian(s, out, N) : read integers in bulk from a little indian stream.
+ // This reads N integers from stream s and put them in array out.
+ template <typename IntType>
+ inline void read_little_endian(std::istream& stream, IntType* out, std::size_t count) {
+ if (IsLittleEndian)
+ stream.read(reinterpret_cast<char*>(out), sizeof(IntType) * count);
+ else
+ for (std::size_t i = 0; i < count; ++i)
+ out[i] = read_little_endian<IntType>(stream);
+ }
+
+ // write_little_endian(s, values, N) : write integers in bulk to a little indian stream.
+ // This takes N integers from array values and writes them on stream s.
+ template <typename IntType>
+ inline void write_little_endian(std::ostream& stream, const IntType* values, std::size_t count) {
+ if (IsLittleEndian)
+ stream.write(reinterpret_cast<const char*>(values), sizeof(IntType) * count);
+ else
+ for (std::size_t i = 0; i < count; ++i)
+ write_little_endian<IntType>(stream, values[i]);
+ }
+
+} // namespace Stockfish::Eval::NNUE
#endif // #ifndef NNUE_COMMON_H_INCLUDED
projects / stockfish / blobdiff