Add intrinsic popcount for gcc

BimmerBass / Loki

C++17 chess engine

GNU General Public License v3.0

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Closed BimmerBass closed 3 years ago

BimmerBass commented 3 years ago

I just finished adding popcount for gcc on my mac, but had trouble pushing the change. This should be pushed.

BimmerBass commented 3 years ago

Now popcount for gcc has been added (as well as the command -march=native) on line 201 in bitboard.h:

/* ... */
#elif (defined(__GNUC__) && defined(USE_POPCNT))
    return __builtin_popcountll(x)
#else
/* ... */