//// Includes
////
-#ifdef _MSC_VER
- #include <intrin.h>
- #ifdef _WIN64
- #pragma intrinsic(_BitScanForward64)
- #else
- #pragma intrinsic(_BitScanForward)
- #endif
- #define USING_INTRINSICS
-#endif
-
#include <iostream>
#include "bitboard.h"
#include "direction.h"
-#if defined(USE_COMPACT_ROOK_ATTACKS)
-
-Bitboard RankAttacks[8][64], FileAttacks[8][64];
-
-#elif defined(USE_32BIT_ATTACKS)
-
-const uint64_t RMult[64] = {
- 0xd7445cdec88002c0ULL, 0xd0a505c1f2001722ULL, 0xe065d1c896002182ULL,
- 0x9a8c41e75a000892ULL, 0x8900b10c89002aa8ULL, 0x9b28d1c1d60005a2ULL,
- 0x15d6c88de002d9aULL, 0xb1dbfc802e8016a9ULL, 0x149a1042d9d60029ULL,
- 0xb9c08050599e002fULL, 0x132208c3af300403ULL, 0xc1000ce2e9c50070ULL,
- 0x9d9aa13c99020012ULL, 0xb6b078daf71e0046ULL, 0x9d880182fb6e002eULL,
- 0x52889f467e850037ULL, 0xda6dc008d19a8480ULL, 0x468286034f902420ULL,
- 0x7140ac09dc54c020ULL, 0xd76ffffa39548808ULL, 0xea901c4141500808ULL,
- 0xc91004093f953a02ULL, 0x2882afa8f6bb402ULL, 0xaebe335692442c01ULL,
- 0xe904a22079fb91eULL, 0x13a514851055f606ULL, 0x76c782018c8fe632ULL,
- 0x1dc012a9d116da06ULL, 0x3c9e0037264fffa6ULL, 0x2036002853c6e4a2ULL,
- 0xe3fe08500afb47d4ULL, 0xf38af25c86b025c2ULL, 0xc0800e2182cf9a40ULL,
- 0x72002480d1f60673ULL, 0x2500200bae6e9b53ULL, 0xc60018c1eefca252ULL,
- 0x600590473e3608aULL, 0x46002c4ab3fe51b2ULL, 0xa200011486bcc8d2ULL,
- 0xb680078095784c63ULL, 0x2742002639bf11aeULL, 0xc7d60021a5bdb142ULL,
- 0xc8c04016bb83d820ULL, 0xbd520028123b4842ULL, 0x9d1600344ac2a832ULL,
- 0x6a808005631c8a05ULL, 0x604600a148d5389aULL, 0xe2e40103d40dea65ULL,
- 0x945b5a0087c62a81ULL, 0x12dc200cd82d28eULL, 0x2431c600b5f9ef76ULL,
- 0xfb142a006a9b314aULL, 0x6870e00a1c97d62ULL, 0x2a9db2004a2689a2ULL,
- 0xd3594600caf5d1a2ULL, 0xee0e4900439344a7ULL, 0x89c4d266ca25007aULL,
- 0x3e0013a2743f97e3ULL, 0x180e31a0431378aULL, 0x3a9e465a4d42a512ULL,
- 0x98d0a11a0c0d9cc2ULL, 0x8e711c1aba19b01eULL, 0x8dcdc836dd201142ULL,
- 0x5ac08a4735370479ULL,
-};
+#if defined(IS_64BIT)
-const int RShift[64] = {
- 20, 21, 21, 21, 21, 21, 21, 20, 21, 22, 22, 22, 22, 22, 22, 21,
- 21, 22, 22, 22, 22, 22, 22, 21, 21, 22, 22, 22, 22, 22, 22, 21,
- 21, 22, 22, 22, 22, 22, 22, 21, 21, 22, 22, 22, 22, 22, 22, 21,
- 21, 22, 22, 22, 22, 22, 22, 21, 20, 21, 21, 21, 21, 21, 21, 20
+const uint64_t BMult[64] = {
+ 0x440049104032280ULL, 0x1021023c82008040ULL, 0x404040082000048ULL,
+ 0x48c4440084048090ULL, 0x2801104026490000ULL, 0x4100880442040800ULL,
+ 0x181011002e06040ULL, 0x9101004104200e00ULL, 0x1240848848310401ULL,
+ 0x2000142828050024ULL, 0x1004024d5000ULL, 0x102044400800200ULL,
+ 0x8108108820112000ULL, 0xa880818210c00046ULL, 0x4008008801082000ULL,
+ 0x60882404049400ULL, 0x104402004240810ULL, 0xa002084250200ULL,
+ 0x100b0880801100ULL, 0x4080201220101ULL, 0x44008080a00000ULL,
+ 0x202200842000ULL, 0x5006004882d00808ULL, 0x200045080802ULL,
+ 0x86100020200601ULL, 0xa802080a20112c02ULL, 0x80411218080900ULL,
+ 0x200a0880080a0ULL, 0x9a01010000104000ULL, 0x28008003100080ULL,
+ 0x211021004480417ULL, 0x401004188220806ULL, 0x825051400c2006ULL,
+ 0x140c0210943000ULL, 0x242800300080ULL, 0xc2208120080200ULL,
+ 0x2430008200002200ULL, 0x1010100112008040ULL, 0x8141050100020842ULL,
+ 0x822081014405ULL, 0x800c049e40400804ULL, 0x4a0404028a000820ULL,
+ 0x22060201041200ULL, 0x360904200840801ULL, 0x881a08208800400ULL,
+ 0x60202c00400420ULL, 0x1204440086061400ULL, 0x8184042804040ULL,
+ 0x64040315300400ULL, 0xc01008801090a00ULL, 0x808010401140c00ULL,
+ 0x4004830c2020040ULL, 0x80005002020054ULL, 0x40000c14481a0490ULL,
+ 0x10500101042048ULL, 0x1010100200424000ULL, 0x640901901040ULL,
+ 0xa0201014840ULL, 0x840082aa011002ULL, 0x10010840084240aULL,
+ 0x420400810420608ULL, 0x8d40230408102100ULL, 0x4a00200612222409ULL,
+ 0xa08520292120600ULL
};
-#else // if defined(USE_32BIT_ATTACKS)
-
const uint64_t RMult[64] = {
0xa8002c000108020ULL, 0x4440200140003000ULL, 0x8080200010011880ULL,
0x380180080141000ULL, 0x1a00060008211044ULL, 0x410001000a0c0008ULL,
0x410201ce5c030092ULL
};
+const int BShift[64] = {
+ 58, 59, 59, 59, 59, 59, 59, 58, 59, 59, 59, 59, 59, 59, 59, 59,
+ 59, 59, 57, 57, 57, 57, 59, 59, 59, 59, 57, 55, 55, 57, 59, 59,
+ 59, 59, 57, 55, 55, 57, 59, 59, 59, 59, 57, 57, 57, 57, 59, 59,
+ 59, 59, 59, 59, 59, 59, 59, 59, 58, 59, 59, 59, 59, 59, 59, 58
+};
+
const int RShift[64] = {
52, 53, 53, 53, 53, 53, 53, 52, 53, 54, 54, 54, 54, 54, 54, 53,
53, 54, 54, 54, 54, 54, 54, 53, 53, 54, 54, 54, 54, 54, 54, 53,
53, 54, 54, 54, 54, 54, 54, 53, 52, 53, 53, 53, 53, 53, 53, 52
};
-#endif // defined(USE_32BIT_ATTACKS)
-
-#if !defined(USE_COMPACT_ROOK_ATTACKS)
-Bitboard RMask[64];
-int RAttackIndex[64];
-Bitboard RAttacks[0x19000];
-#endif
-
-#if defined(USE_32BIT_ATTACKS)
+#else // if !defined(IS_64BIT)
const uint64_t BMult[64] = {
0x54142844c6a22981ULL, 0x710358a6ea25c19eULL, 0x704f746d63a4a8dcULL,
0xdc01f6dca4bebbdcULL,
};
+const uint64_t RMult[64] = {
+ 0xd7445cdec88002c0ULL, 0xd0a505c1f2001722ULL, 0xe065d1c896002182ULL,
+ 0x9a8c41e75a000892ULL, 0x8900b10c89002aa8ULL, 0x9b28d1c1d60005a2ULL,
+ 0x15d6c88de002d9aULL, 0xb1dbfc802e8016a9ULL, 0x149a1042d9d60029ULL,
+ 0xb9c08050599e002fULL, 0x132208c3af300403ULL, 0xc1000ce2e9c50070ULL,
+ 0x9d9aa13c99020012ULL, 0xb6b078daf71e0046ULL, 0x9d880182fb6e002eULL,
+ 0x52889f467e850037ULL, 0xda6dc008d19a8480ULL, 0x468286034f902420ULL,
+ 0x7140ac09dc54c020ULL, 0xd76ffffa39548808ULL, 0xea901c4141500808ULL,
+ 0xc91004093f953a02ULL, 0x2882afa8f6bb402ULL, 0xaebe335692442c01ULL,
+ 0xe904a22079fb91eULL, 0x13a514851055f606ULL, 0x76c782018c8fe632ULL,
+ 0x1dc012a9d116da06ULL, 0x3c9e0037264fffa6ULL, 0x2036002853c6e4a2ULL,
+ 0xe3fe08500afb47d4ULL, 0xf38af25c86b025c2ULL, 0xc0800e2182cf9a40ULL,
+ 0x72002480d1f60673ULL, 0x2500200bae6e9b53ULL, 0xc60018c1eefca252ULL,
+ 0x600590473e3608aULL, 0x46002c4ab3fe51b2ULL, 0xa200011486bcc8d2ULL,
+ 0xb680078095784c63ULL, 0x2742002639bf11aeULL, 0xc7d60021a5bdb142ULL,
+ 0xc8c04016bb83d820ULL, 0xbd520028123b4842ULL, 0x9d1600344ac2a832ULL,
+ 0x6a808005631c8a05ULL, 0x604600a148d5389aULL, 0xe2e40103d40dea65ULL,
+ 0x945b5a0087c62a81ULL, 0x12dc200cd82d28eULL, 0x2431c600b5f9ef76ULL,
+ 0xfb142a006a9b314aULL, 0x6870e00a1c97d62ULL, 0x2a9db2004a2689a2ULL,
+ 0xd3594600caf5d1a2ULL, 0xee0e4900439344a7ULL, 0x89c4d266ca25007aULL,
+ 0x3e0013a2743f97e3ULL, 0x180e31a0431378aULL, 0x3a9e465a4d42a512ULL,
+ 0x98d0a11a0c0d9cc2ULL, 0x8e711c1aba19b01eULL, 0x8dcdc836dd201142ULL,
+ 0x5ac08a4735370479ULL,
+};
+
const int BShift[64] = {
26, 27, 27, 27, 27, 27, 27, 26, 27, 27, 27, 27, 27, 27, 27, 27,
27, 27, 25, 25, 25, 25, 27, 27, 27, 27, 25, 23, 23, 25, 27, 27,
27, 27, 27, 27, 27, 27, 27, 27, 26, 27, 27, 27, 27, 27, 27, 26
};
-#else // if defined(USE_32BIT_ATTACKS)
-
-const uint64_t BMult[64] = {
- 0x440049104032280ULL, 0x1021023c82008040ULL, 0x404040082000048ULL,
- 0x48c4440084048090ULL, 0x2801104026490000ULL, 0x4100880442040800ULL,
- 0x181011002e06040ULL, 0x9101004104200e00ULL, 0x1240848848310401ULL,
- 0x2000142828050024ULL, 0x1004024d5000ULL, 0x102044400800200ULL,
- 0x8108108820112000ULL, 0xa880818210c00046ULL, 0x4008008801082000ULL,
- 0x60882404049400ULL, 0x104402004240810ULL, 0xa002084250200ULL,
- 0x100b0880801100ULL, 0x4080201220101ULL, 0x44008080a00000ULL,
- 0x202200842000ULL, 0x5006004882d00808ULL, 0x200045080802ULL,
- 0x86100020200601ULL, 0xa802080a20112c02ULL, 0x80411218080900ULL,
- 0x200a0880080a0ULL, 0x9a01010000104000ULL, 0x28008003100080ULL,
- 0x211021004480417ULL, 0x401004188220806ULL, 0x825051400c2006ULL,
- 0x140c0210943000ULL, 0x242800300080ULL, 0xc2208120080200ULL,
- 0x2430008200002200ULL, 0x1010100112008040ULL, 0x8141050100020842ULL,
- 0x822081014405ULL, 0x800c049e40400804ULL, 0x4a0404028a000820ULL,
- 0x22060201041200ULL, 0x360904200840801ULL, 0x881a08208800400ULL,
- 0x60202c00400420ULL, 0x1204440086061400ULL, 0x8184042804040ULL,
- 0x64040315300400ULL, 0xc01008801090a00ULL, 0x808010401140c00ULL,
- 0x4004830c2020040ULL, 0x80005002020054ULL, 0x40000c14481a0490ULL,
- 0x10500101042048ULL, 0x1010100200424000ULL, 0x640901901040ULL,
- 0xa0201014840ULL, 0x840082aa011002ULL, 0x10010840084240aULL,
- 0x420400810420608ULL, 0x8d40230408102100ULL, 0x4a00200612222409ULL,
- 0xa08520292120600ULL
+const int RShift[64] = {
+ 20, 21, 21, 21, 21, 21, 21, 20, 21, 22, 22, 22, 22, 22, 22, 21,
+ 21, 22, 22, 22, 22, 22, 22, 21, 21, 22, 22, 22, 22, 22, 22, 21,
+ 21, 22, 22, 22, 22, 22, 22, 21, 21, 22, 22, 22, 22, 22, 22, 21,
+ 21, 22, 22, 22, 22, 22, 22, 21, 20, 21, 21, 21, 21, 21, 21, 20
};
-const int BShift[64] = {
- 58, 59, 59, 59, 59, 59, 59, 58, 59, 59, 59, 59, 59, 59, 59, 59,
- 59, 59, 57, 57, 57, 57, 59, 59, 59, 59, 57, 55, 55, 57, 59, 59,
- 59, 59, 57, 55, 55, 57, 59, 59, 59, 59, 57, 57, 57, 57, 59, 59,
- 59, 59, 59, 59, 59, 59, 59, 59, 58, 59, 59, 59, 59, 59, 59, 58
-};
+#endif
+
-#endif // defined(USE_32BIT_ATTACKS)
+Bitboard RMask[64];
+int RAttackIndex[64];
+Bitboard RAttacks[0x19000];
Bitboard BMask[64];
int BAttackIndex[64];
const int shift[2], const Bitboard mult[],
int deltas[][2]);
void init_pseudo_attacks();
-#if defined(USE_COMPACT_ROOK_ATTACKS)
- void init_file_and_rank_attacks();
-#endif
}
init_ray_bitboards();
init_attacks();
init_between_bitboards();
-#if defined(USE_COMPACT_ROOK_ATTACKS)
- init_file_and_rank_attacks();
-#else
- init_sliding_attacks(RAttacks, RAttackIndex, RMask, RShift,
- RMult, rookDeltas);
-#endif
- init_sliding_attacks(BAttacks, BAttackIndex, BMask, BShift,
- BMult, bishopDeltas);
+ init_sliding_attacks(RAttacks, RAttackIndex, RMask, RShift, RMult, rookDeltas);
+ init_sliding_attacks(BAttacks, BAttackIndex, BMask, BShift, BMult, bishopDeltas);
init_pseudo_attacks();
}
-#if defined(USE_FOLDED_BITSCAN)
-
-static const int BitTable[64] = {
- 63, 30, 3, 32, 25, 41, 22, 33, 15, 50, 42, 13, 11, 53, 19, 34, 61, 29, 2,
- 51, 21, 43, 45, 10, 18, 47, 1, 54, 9, 57, 0, 35, 62, 31, 40, 4, 49, 5, 52,
- 26, 60, 6, 23, 44, 46, 27, 56, 16, 7, 39, 48, 24, 59, 14, 12, 55, 38, 28,
- 58, 20, 37, 17, 36, 8
-};
-
+/// pop_1st_bit() finds and clears the least significant nonzero bit in a
+/// nonzero bitboard.
-/// first_1() finds the least significant nonzero bit in a nonzero bitboard.
+#if defined(IS_64BIT)
-Square first_1(Bitboard b) {
- b ^= (b - 1);
- uint32_t fold = int(b) ^ int(b >> 32);
+Square pop_1st_bit(Bitboard *b) {
+ Bitboard bb = *b ^ (*b - 1);
+ uint32_t fold = int(bb) ^ int(bb >> 32);
+ *b &= (*b - 1);
return Square(BitTable[(fold * 0x783a9b23) >> 26]);
}
-
-/// pop_1st_bit() finds and clears the least significant nonzero bit in a
-/// nonzero bitboard.
-
-#if defined(USE_32BIT_ATTACKS)
+#else
// Use type-punning
union b_union {
return Square(BitTable[(b * 0x783a9b23) >> 26]);
}
-#else
-
-Square pop_1st_bit(Bitboard *b) {
- Bitboard bb = *b ^ (*b - 1);
- uint32_t fold = int(bb) ^ int(bb >> 32);
- *b &= (*b - 1);
- return Square(BitTable[(fold * 0x783a9b23) >> 26]);
-}
-
#endif
-#else // defined(USE_FOLDED_BITSCAN)
-
-static const int BitTable[64] = {
- 0, 1, 2, 7, 3, 13, 8, 19, 4, 25, 14, 28, 9, 34, 20, 40, 5, 17, 26, 38, 15,
- 46, 29, 48, 10, 31, 35, 54, 21, 50, 41, 57, 63, 6, 12, 18, 24, 27, 33, 39,
- 16, 37, 45, 47, 30, 53, 49, 56, 62, 11, 23, 32, 36, 44, 52, 55, 61, 22, 43,
- 51, 60, 42, 59, 58
-};
-
-
-/// first_1() finds the least significant nonzero bit in a nonzero bitboard.
-
-Square first_1(Bitboard b) {
- return Square(BitTable[((b & -b) * 0x218a392cd3d5dbfULL) >> 58]);
-}
-
-
-/// pop_1st_bit() finds and clears the least significant nonzero bit in a
-/// nonzero bitboard.
-
-Square pop_1st_bit(Bitboard *b) {
- Bitboard bb = *b;
- *b &= (*b - 1);
- return Square(BitTable[((bb & -bb) * 0x218a392cd3d5dbfULL) >> 58]);
-}
-
-#endif // defined(USE_FOLDED_BITSCAN)
-
-
namespace {
// All functions below are used to precompute various bitboards during
attackIndex[i] = index;
mask[i] = sliding_attacks(i, 0ULL, 4, deltas, 1, 6, 1, 6);
-#if defined(USE_32BIT_ATTACKS)
- j = (1 << (32 - shift[i]));
-#else
+#if defined(IS_64BIT)
j = (1 << (64 - shift[i]));
+#else
+ j = (1 << (32 - shift[i]));
#endif
for(k = 0; k < j; k++) {
-#if defined(USE_32BIT_ATTACKS)
+#if defined(IS_64BIT)
+ b = index_to_bitboard(k, mask[i]);
+ attacks[index + ((b * mult[i]) >> shift[i])] =
+ sliding_attacks(i, b, 4, deltas);
+#else
b = index_to_bitboard(k, mask[i]);
attacks[index +
(unsigned(int(b) * int(mult[i]) ^
int(b >> 32) * int(mult[i] >> 32))
>> shift[i])] =
sliding_attacks(i, b, 4, deltas);
-#else
- b = index_to_bitboard(k, mask[i]);
- attacks[index + ((b * mult[i]) >> shift[i])] =
- sliding_attacks(i, b, 4, deltas);
#endif
}
index += j;
}
}
-#if defined(USE_COMPACT_ROOK_ATTACKS)
- void init_file_and_rank_attacks() {
- int i, j, k, l, m, s;
- Bitboard b1, b2;
- for(i = 0; i < 64; i++) {
-
- for(m = 0; m <= 1; m++) {
- b1 = 0ULL;
- for(j = 0; j < 6; j++) if(i & (1<<j)) b1 |= (1ULL << ((j+1)*(1+m*7)));
- for(j = 0; j < 8; j++) {
- b2 = 0ULL;
- for(k = 0, s = 1; k < 2; k++, s *= -1) {
- for(l = j+s; l >= 0 && l <= 7; l += s) {
- b2 |= (m? RankBB[l] : FileBB[l]);
- if(b1 & (1ULL << (l*(1+m*7)))) break;
- }
- }
- if(m) FileAttacks[j][(b1*0xd6e8802041d0c441ULL) >> 58] = b2;
- else RankAttacks[j][i] = b2;
- }
- }
- }
- }
-#endif // defined(USE_COMPACT_ROOK_ATTACKS)
-
}
projects / stockfish / blobdiff