void keys_generation(char *key)
{
// generating k1
p10_key_permutation(key);
circular_left_shift(key_tmp);
p8_key_permutation(key_tmp, 1);
// generating k2
circular_left_shift(key_tmp);
circular_left_shift(key_tmp); // repeated
p8_key_permutation(key_tmp, 2);
}
void MoveGenerator::add_pawn_attacks(class MoveList &list, const class Board &board, const int side){
const int diffs[2][2] = {{7, 64-9}, {9, 64-7}};
const U64 promotions_mask[2] = {ROW_8, ROW_1};
const U64 file_mask[2] = {~FILE_H, ~FILE_A};
U64 attacks, ep_attacks, promotions, targets, pawns, enemy;
pawns = board.bitboards[side | PAWN];
enemy = board.bitboards[!side];
// CALCULATE ATTACKS FOR LEFT, RIGHT
for (int dir = 0; dir < 2; dir++){
int diff = diffs[dir][side];
targets = circular_left_shift(pawns, diff) & file_mask[dir];
// ADD ATTACKS
attacks = enemy & targets;
add_moves_with_diff(diff, attacks & (~promotions_mask[side]), list, board, NO_FLAGS);
// ADD EP ATTACKS
ep_attacks = targets & (1ULL << board.irrev.ep_square);
add_moves_with_diff(diff, ep_attacks, list, board, EP_CAPTURE | ((PAWN|(!side)) << 24));
// ADD PROMOTION ATTACKS
promotions = attacks & promotions_mask[side];
add_promotions_with_diff(diff, promotions, list, board, side);
}
}
void MoveGenerator::add_pawn_pushes(class MoveList &list, const class Board &board, const int side){
const int diffs[2] = {8, 64-8};
const U64 promotions_mask[2] = {ROW_8, ROW_1};
const U64 start_row_plus_one_mask[2] = {ROW_3, ROW_6};
U64 pushes, double_pushes, promotions, pawns, free_squares;
int diff = diffs[side];
pawns = board.bitboards[side | PAWN];
free_squares = ~(board.bitboards[WHITE] | board.bitboards[BLACK]);
// ADD SINGLE PUSHES
pushes = circular_left_shift(pawns, diff) & free_squares;
add_moves_with_diff(diff, pushes & (~promotions_mask[side]), list, board, NO_FLAGS);
// ADD PROMOTIONS
promotions = pushes & promotions_mask[side];
add_promotions_with_diff(diff, promotions, list, board, side);
// ADD DOUBLE PUSHES
double_pushes = circular_left_shift(pushes & start_row_plus_one_mask[side], diff) & free_squares;
add_moves_with_diff(diff+diff, double_pushes, list, board, PAWN_DOUBLE_PUSH);
}
void calc_SHA(int *abcdef, int *words, SHAContext *con){
int i,inhash[5];
unsigned f = 0x00000000;
unsigned k = 0x00000000;
unsigned temp = 0x00000000;
for(i = 0; i < 5; i++)
inhash[i] = abcdef[i];
for( i = 0; i < 80; i++){
if(i < 20){
f = (inhash[3] ^ (inhash[1] & (inhash[2] ^ inhash[3])));
k = 0x5A827999;
}
else{
if(i >= 20 && i < 40){
f = inhash[1] ^ inhash[2] ^ inhash[3];
k = 0x6ED9EBA1;
}
else{
if(i >= 40 && i < 60){
f = (inhash[1] & inhash[2]) | (inhash[1] & inhash[3]) | (inhash[2] & inhash[3]);
k = 0x8F1BBCDC;
}
else{
if(i >= 60 && i<80){
f = inhash[1] ^ inhash[2] ^ inhash[3];
k = 0xCA62C1D6;
}
}
}
}
temp = circular_left_shift(inhash[0],5) + f + inhash[4] + k + words[i];
inhash[4] = inhash[3];
inhash[3] = inhash[2];
inhash[2] = circular_left_shift(inhash[1],30);
inhash[1] = inhash[0];
inhash[0] = temp;
}
for( i = 0; i < 5; i++)
con->Message_Digest[i] += inhash[i];
}
void init_words_remain(unsigned int *w){
int t;
unsigned int temp;
for( t = 16; t < 80; t++){
w[t] = (unsigned int)(w[t-3] ^ w[t-8] ^ w[t-14] ^ w[t-16]);
if(t ==16)
printf("spl: %d",w[t]);
temp = (unsigned int)circular_left_shift(w[t],1);
w[t] = (unsigned int) temp;
if(t == 16)
printf("spl1: %d",w[t]);
}
}
