mirror of
https://github.com/official-stockfish/Stockfish.git
synced 2026-07-22 12:47:08 +00:00
syzygy1andStéphane Nicolet
cc9d503dde
Clang-10.0.0 poses as gcc-4.2: $ clang++ -E -dM - </dev/null | grep GNUC This means that Clang is using the workaround for the alignment bug of gcc-8 even though it does not have the bug (as far as I know). This patch should speed up AVX2 and AVX512 compiles on Windows (when using Clang), because it disables (for Clang) the gcc workaround we had introduced in this commit: https://github.com/official-stockfish/Stockfish/commit/875183b310a8249922c2155e82cb4cecfae2097e closes https://github.com/official-stockfish/Stockfish/pull/3050 No functional change.
128 lines
3.7 KiB
C++
128 lines
3.7 KiB
C++
/*
|
|
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
|
|
Copyright (C) 2004-2020 The Stockfish developers (see AUTHORS file)
|
|
|
|
Stockfish is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
Stockfish is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
// Constants used in NNUE evaluation function
|
|
|
|
#ifndef NNUE_COMMON_H_INCLUDED
|
|
#define NNUE_COMMON_H_INCLUDED
|
|
|
|
#include <cstring>
|
|
#include <iostream>
|
|
|
|
#if defined(USE_AVX2)
|
|
#include <immintrin.h>
|
|
|
|
#elif defined(USE_SSE41)
|
|
#include <smmintrin.h>
|
|
|
|
#elif defined(USE_SSSE3)
|
|
#include <tmmintrin.h>
|
|
|
|
#elif defined(USE_SSE2)
|
|
#include <emmintrin.h>
|
|
|
|
#elif defined(USE_MMX)
|
|
#include <mmintrin.h>
|
|
|
|
#elif defined(USE_NEON)
|
|
#include <arm_neon.h>
|
|
#endif
|
|
|
|
// HACK: Use _mm256_loadu_si256() instead of _mm256_load_si256. Otherwise a binary
|
|
// compiled with older g++ crashes because the output memory is not aligned
|
|
// even though alignas is specified.
|
|
#if defined(USE_AVX2)
|
|
#if defined(__GNUC__ ) && (__GNUC__ < 9) && defined(_WIN32) && !defined(__clang__)
|
|
#define _mm256_loadA_si256 _mm256_loadu_si256
|
|
#define _mm256_storeA_si256 _mm256_storeu_si256
|
|
#else
|
|
#define _mm256_loadA_si256 _mm256_load_si256
|
|
#define _mm256_storeA_si256 _mm256_store_si256
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(USE_AVX512)
|
|
#if defined(__GNUC__ ) && (__GNUC__ < 9) && defined(_WIN32) && !defined(__clang__)
|
|
#define _mm512_loadA_si512 _mm512_loadu_si512
|
|
#define _mm512_storeA_si512 _mm512_storeu_si512
|
|
#else
|
|
#define _mm512_loadA_si512 _mm512_load_si512
|
|
#define _mm512_storeA_si512 _mm512_store_si512
|
|
#endif
|
|
#endif
|
|
|
|
namespace Eval::NNUE {
|
|
|
|
// Version of the evaluation file
|
|
constexpr std::uint32_t kVersion = 0x7AF32F16u;
|
|
|
|
// Constant used in evaluation value calculation
|
|
constexpr int FV_SCALE = 16;
|
|
constexpr int kWeightScaleBits = 6;
|
|
|
|
// Size of cache line (in bytes)
|
|
constexpr std::size_t kCacheLineSize = 64;
|
|
|
|
// SIMD width (in bytes)
|
|
#if defined(USE_AVX2)
|
|
constexpr std::size_t kSimdWidth = 32;
|
|
|
|
#elif defined(USE_SSE2)
|
|
constexpr std::size_t kSimdWidth = 16;
|
|
|
|
#elif defined(USE_MMX)
|
|
constexpr std::size_t kSimdWidth = 8;
|
|
|
|
#elif defined(USE_NEON)
|
|
constexpr std::size_t kSimdWidth = 16;
|
|
#endif
|
|
|
|
constexpr std::size_t kMaxSimdWidth = 32;
|
|
|
|
// Type of input feature after conversion
|
|
using TransformedFeatureType = std::uint8_t;
|
|
using IndexType = std::uint32_t;
|
|
|
|
// Round n up to be a multiple of base
|
|
template <typename IntType>
|
|
constexpr IntType CeilToMultiple(IntType n, IntType base) {
|
|
return (n + base - 1) / base * base;
|
|
}
|
|
|
|
// read_little_endian() is our utility to read an integer (signed or unsigned, any size)
|
|
// from a stream in little-endian order. We swap the byte order after the read if
|
|
// 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];
|
|
|
|
std::memcpy(&result, &v, sizeof(IntType));
|
|
return result;
|
|
}
|
|
|
|
} // namespace Eval::NNUE
|
|
|
|
#endif // #ifndef NNUE_COMMON_H_INCLUDED
|