}
-uint32_t probe_kpk_bitbase(Square wksq, Square wpsq, Square bksq, Color stm) {
+uint32_t Bitbases::probe_kpk(Square wksq, Square wpsq, Square bksq, Color stm) {
int idx = index(wksq, bksq, wpsq, stm);
return KPKBitbase[idx / 32] & (1 << (idx & 31));
}
-void kpk_bitbase_init() {
+void Bitbases::init_kpk() {
Result db[IndexMax];
KPKPosition pos;
while (b)
{
- r |= Us == WHITE ? db[index(pop_1st_bit(&b), bksq, psq, BLACK)]
- : db[index(wksq, pop_1st_bit(&b), psq, WHITE)];
+ r |= Us == WHITE ? db[index(pop_lsb(&b), bksq, psq, BLACK)]
+ : db[index(wksq, pop_lsb(&b), psq, WHITE)];
if (Us == WHITE && (r & WIN))
return WIN;