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Simplify DistanceRingsBB init

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Verified by same benchmark and picking some random values.

No functional change.
This commit is contained in:
homoSapiensSapiens 2013-08-14 11:17:22 +03:00 • committed by Marco Costalba
parent fc316cbca9
commit a6c0ba2100
1 changed files with 4 additions and 6 deletions
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10
src/bitboard.cpp
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@ -185,13 +185,11 @@ void Bitboards::init() {
for (Square s1 = SQ_A1; s1 <= SQ_H8; s1++) for (Square s1 = SQ_A1; s1 <= SQ_H8; s1++)
for (Square s2 = SQ_A1; s2 <= SQ_H8; s2++) for (Square s2 = SQ_A1; s2 <= SQ_H8; s2++)
{
SquareDistance[s1][s2] = std::max(file_distance(s1, s2), rank_distance(s1, s2)); SquareDistance[s1][s2] = std::max(file_distance(s1, s2), rank_distance(s1, s2));
if (s1 != s2)
for (Square s1 = SQ_A1; s1 <= SQ_H8; s1++) DistanceRingsBB[s1][SquareDistance[s1][s2] - 1] |= s2;
for (int d = 1; d < 8; d++) }
for (Square s2 = SQ_A1; s2 <= SQ_H8; s2++)
if (SquareDistance[s1][s2] == d)
DistanceRingsBB[s1][d - 1] |= s2;
int steps[][9] = { {}, { 7, 9 }, { 17, 15, 10, 6, -6, -10, -15, -17 }, int steps[][9] = { {}, { 7, 9 }, { 17, 15, 10, 6, -6, -10, -15, -17 },
{}, {}, {}, { 9, 7, -7, -9, 8, 1, -1, -8 } }; {}, {}, {}, { 9, 7, -7, -9, 8, 1, -1, -8 } };