stellar

User bit header for standard functions

2 files changed, 4 insertions(+), 21 deletions(-)

diff --git a/ CMakeLists.txt b/ CMakeLists.txt

@@ -3,7 +3,7 @@ set(CMAKE_EXPORT_COMPILE_COMMANDS ON) project( Stellar

VERSION 1.2.1

VERSION 1.2.2

DESCRIPTION "Chess engine written in C++" HOMEPAGE_URL https://git.dimitrijedobrota.com/stellar.git LANGUAGES CXX

diff --git a/ src/utils/bit.hpp b/ src/utils/bit.hpp

@@ -2,6 +2,7 @@ #define STELLAR_BIT_H #include "utils.hpp"

#include <bit>

namespace bit {

@@ -9,26 +10,8 @@ inline constexpr bool get(const U64 &bitboard, uint8_t square) { return (bitboar inline constexpr void set(U64 &bitboard, uint8_t square) { bitboard |= (C64(1) << square); } inline constexpr void pop(U64 &bitboard, uint8_t square) { bitboard &= ~(C64(1) << (square)); }

inline constexpr uint8_t count(U64 bitboard) {

#if __has_builtin(__builtin_popcountll)

return __builtin_popcountll(bitboard);

#else

int count = 0;

for (; bitboard > 0; bitboard &= bitboard - 1)

count++;

return count;

#endif

}

inline constexpr uint8_t lsb_index(U64 bitboard) {

#if __has_builtin(__builtin_ffsll)

return __builtin_ffsll(bitboard) - 1;

#else

if (!bitboard) return -1;

return bit_count((bitboard & -bitboard) - 1);

#endif

}

inline constexpr uint8_t count(U64 bitboard) { return std::popcount(bitboard); }

inline constexpr uint8_t lsb_index(U64 bitboard) { return std::countr_zero(bitboard); }

inline constexpr U64 &lsb_pop(U64 &bitboard) { return bitboard &= bitboard & (bitboard - 1); } #define bitboard_for_each_bit(var, bb) \