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Retire SquaresByColorBB[] and enum SquareColor

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Use same_color_squares() instead.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2011-12-28 10:49:55 +01:00
parent a695ed65a8
commit ad4739a6d4
5 changed files with 11 additions and 15 deletions
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10
src/bitboard.h
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@@ -23,7 +23,6 @@
#include "types.h"
extern Bitboard SquaresByColorBB[2];
extern Bitboard FileBB[8];
extern Bitboard NeighboringFilesBB[8];
extern Bitboard ThisAndNeighboringFilesBB[8];
@@ -226,6 +225,15 @@ inline bool squares_aligned(Square s1, Square s2, Square s3) {
}
/// same_color_squares() returns a bitboard representing all squares with
/// the same color of the given square.
inline Bitboard same_color_squares(Square s) {
return bit_is_set(0xAA55AA55AA55AA55ULL, s) ? 0xAA55AA55AA55AA55ULL
: ~0xAA55AA55AA55AA55ULL;
}
/// first_1() finds the least significant nonzero bit in a nonzero bitboard.
/// pop_1st_bit() finds and clears the least significant nonzero bit in a
/// nonzero bitboard.