stellar

Add Bit Count function

1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/ src/engine.c b/ src/engine.c

@@ -25,6 +25,17 @@ const U64 notHFile = C64(0x7f7f7f7f7f7f7f7f); // ~0x8080808080808080 #define bit_set(bitboard, square) ((bitboard) |= C64(1) << (square)) #define bit_pop(bitboard, square) ((bitboard) &= ~(C64(1) << (square)))

static inline int bit_count(U64 bitboard) {

int count = 0;

while (bitboard > 0) {

count++;

bitboard &= bitboard - 1;

}

return count;

}

// squares // clang-format off enum enumSquare {

@@ -237,5 +248,7 @@ int main(void) { for (int square = 0; square < 64; square++) bitboard_print(mask_bishop_attacks(square));

printf("%d\n", bit_count(block));

return 0; }