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Templetize sliding attacks

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No functional change and no speed regression, it seems
to be even a bit faster on MSVC and gcc.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2012-02-12 16:02:13 +01:00
parent 099b5e45e6
commit 7b4b65d7a9
5 changed files with 43 additions and 59 deletions
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14
src/bitboard.cpp
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@@ -64,7 +64,7 @@ namespace {
typedef unsigned (Fn)(Square, Bitboard);
void init_magics(Bitboard table[], Bitboard* attacks[], Bitboard magics[],
Bitboard masks[], unsigned shifts[], Square deltas[], Fn get_index);
Bitboard masks[], unsigned shifts[], Square deltas[], Fn index);
}
@@ -219,13 +219,13 @@ void bitboards_init() {
Square RDeltas[] = { DELTA_N, DELTA_E, DELTA_S, DELTA_W };
Square BDeltas[] = { DELTA_NE, DELTA_SE, DELTA_SW, DELTA_NW };
init_magics(RTable, RAttacks, RMagics, RMasks, RShifts, RDeltas, r_index);
init_magics(BTable, BAttacks, BMagics, BMasks, BShifts, BDeltas, b_index);
init_magics(RTable, RAttacks, RMagics, RMasks, RShifts, RDeltas, magic_index<ROOK>);
init_magics(BTable, BAttacks, BMagics, BMasks, BShifts, BDeltas, magic_index<BISHOP>);
for (Square s = SQ_A1; s <= SQ_H8; s++)
{
PseudoAttacks[BISHOP][s] = bishop_attacks_bb(s, 0);
PseudoAttacks[ROOK][s] = rook_attacks_bb(s, 0);
PseudoAttacks[BISHOP][s] = attacks_bb<BISHOP>(s, 0);
PseudoAttacks[ROOK][s] = attacks_bb<ROOK>(s, 0);
PseudoAttacks[QUEEN][s] = PseudoAttacks[BISHOP][s] | PseudoAttacks[ROOK][s];
}
@@ -290,7 +290,7 @@ namespace {
// use the so called "fancy" approach.
void init_magics(Bitboard table[], Bitboard* attacks[], Bitboard magics[],
Bitboard masks[], unsigned shifts[], Square deltas[], Fn get_index) {
Bitboard masks[], unsigned shifts[], Square deltas[], Fn index) {
int MagicBoosters[][8] = { { 3191, 2184, 1310, 3618, 2091, 1308, 2452, 3996 },
{ 1059, 3608, 605, 3234, 3326, 38, 2029, 3043 } };
@@ -342,7 +342,7 @@ namespace {
// effect of verifying the magic.
for (i = 0; i < size; i++)
{
Bitboard& attack = attacks[s][get_index(s, occupancy[i])];
Bitboard& attack = attacks[s][index(s, occupancy[i])];
if (attack && attack != reference[i])
break;