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add move.c from pre-bitboard version

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Bruno Raoult
2024-02-29 09:27:29 +01:00
parent 7859228f89
commit 6d412e7fce
4 changed files with 859 additions and 862 deletions
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43
src/hyperbola-quintessence.c
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@@ -48,7 +48,6 @@ uchar bb_rank_attacks[64 * 8];
* to save one operation in hyperbola_moves().
* TODO ? replace rank attack with this idea, mapping rank to diagonal ?
* See http://timcooijmans.blogspot.com/2014/04/
*
*/
void hyperbola_init()
{
@@ -56,7 +55,8 @@ void hyperbola_init()
*/
for (int occ = 0; occ < 64; ++occ) {
for (int file = 0; file < 8; ++file) {
uchar attacks = 0;
int attacks = 0;
//int o = mask << 1; /* skip right square */
/* set f left attacks */
for (int slide = file - 1; slide >= 0; --slide) {
@@ -69,10 +69,18 @@ void hyperbola_init()
for (int slide = file + 1; slide < 8; ++slide) {
int b = bb_sq[slide];
attacks |= b;
if ((occ << 1) & b)
if ((occ << 1) & b) /* piece on b, we stop */
//if ((o & b) == b)
break;
}
bb_rank_attacks[occ * 8 + file] = attacks;
bb_rank_attacks[(occ << 3) + file] = attacks;
//if (((occ << 3) + file) == 171) {
//char str[64], str2[64];
//printf("mask=%x=%s file=%d att=%x=%s\n",
// occ, bitboard_rank_sprint(str, occ), file,
// attacks, bitboard_rank_sprint(str2, attacks));
//}
}
}
}
@@ -88,11 +96,16 @@ void hyperbola_init()
*/
static bitboard_t hyperbola_rank_moves(bitboard_t occ, square_t sq)
{
uint32_t rank = sq & SQ_FILEMASK;
uint32_t file = sq & SQ_RANKMASK;
uint64_t o = (occ >> rank) & 0x7e; /* 01111110 clear bits 0 & 7 */
return ((bitboard_t)bb_rank_attacks[o * 4 + file]) << rank;
u32 rank = sq & SQ_RANKMASK;
u32 file = sq & SQ_FILEMASK;
u64 o = (occ >> rank) & 0176; /* 01111110 clear bits 0 & 7 */
//char zob[128], zob2[128];
//printf("rank_moves: occ=%lx=%s file=%d o=%lx=%s index=%ld=%ld attack=%lx=%s\n", occ,
// bitboard_rank_sprint(zob, occ), file, o,
// bitboard_rank_sprint(zob, o), (o << 2) + file, (o * 4) + file,
// (bitboard_t)bb_rank_attacks[(o << 2) + file] << rank,
// bitboard_rank_sprint(zob2, (bitboard_t)bb_rank_attacks[(o << 2) + file] << rank));
return ((bitboard_t)bb_rank_attacks[(o << 2) + file]) << rank;
}
/**
@@ -119,30 +132,30 @@ static bitboard_t hyperbola_moves(const bitboard_t pieces, const square_t sq,
static bitboard_t hyperbola_file_moves(bitboard_t occ, square_t sq)
{
return hyperbola_moves(occ, bb_file[sq], sq);
return hyperbola_moves(occ, sq, bb_file[sq]);
}
static bitboard_t hyperbola_diag_moves(bitboard_t occ, square_t sq)
{
return hyperbola_moves(occ, bb_diag[sq], sq);
return hyperbola_moves(occ, sq, bb_diag[sq]);
}
static bitboard_t hyperbola_anti_moves(bitboard_t occ, square_t sq)
{
return hyperbola_moves(occ, bb_anti[sq], sq);
return hyperbola_moves(occ, sq, bb_anti[sq]);
}
bitboard_t hyperbola_bishop_moves(bitboard_t occ, square_t sq)
{
return hyperbola_diag_moves(occ, sq) + hyperbola_anti_moves(occ, sq);
return hyperbola_diag_moves(occ, sq) | hyperbola_anti_moves(occ, sq);
}
bitboard_t hyperbola_rook_moves(bitboard_t occ, square_t sq)
{
return hyperbola_file_moves(occ, sq) + hyperbola_rank_moves(occ, sq);
return hyperbola_file_moves(occ, sq) | hyperbola_rank_moves(occ, sq);
}
bitboard_t hyperbola_queen_moves(bitboard_t occ, square_t sq)
{
return hyperbola_bishop_moves(occ, sq) + hyperbola_rook_moves(occ, sq);
return hyperbola_bishop_moves(occ, sq) | hyperbola_rook_moves(occ, sq);
}