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refactor: (bb64)occupied -> ~(Bb64)PIECE_EMPTY

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Ole Morud
2026-01-07 20:17:55 +01:00
parent 5a5a392c8b
commit bb3d99b011
9 changed files with 71 additions and 83 deletions
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12
engine-attack-sets.h
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@@ -91,7 +91,7 @@ static Bb64 diagonals(Bb64 p)
* ==================
*
* All piece attack functions rely on the caller masking their own pieces.
* e.g. `knight_attacks(knights) & ~our_occupied`
* e.g. `knight_attacks(knights) & empty`
* */
static Bb64 knight_attacks(Bb64 p)
@@ -522,7 +522,7 @@ static Bb64 attacks_to(struct pos const* pos,
Bb64 pretend_occupied,
Bb64 pretend_empty)
{
Bb64 const occ_orig = pos->occupied[SIDE_WHITE] | pos->occupied[SIDE_BLACK];
Bb64 const occ_orig = ~(pos->pieces[SIDE_WHITE][PIECE_EMPTY] & pos->pieces[SIDE_BLACK][PIECE_EMPTY]);
Bb64 const occ = (occ_orig & ~pretend_empty) | pretend_occupied;
Bb64 const* pw = pos->pieces[SIDE_WHITE];
@@ -563,15 +563,15 @@ static
Bb64 checkers(struct pos const* pos, Side8 us)
{
/* TODO: specialize */
return attacks_to(pos, pos->pieces[us][PIECE_KING], 0ULL, 0ULL) & ~pos->occupied[us];
return attacks_to(pos, pos->pieces[us][PIECE_KING], 0ULL, 0ULL) & pos->pieces[us][PIECE_EMPTY];
}
static
Bb64 pinning_lines_to_target(struct pos const* pos, Side8 us, Sq8 tsq)
{
Side8 const them = other_side(us);
Bb64 const our_occ = pos->occupied[us];
Bb64 const their_occ = pos->occupied[them];
Bb64 const our_occ = ~pos->pieces[us][PIECE_EMPTY];
Bb64 const their_occ = ~pos->pieces[them][PIECE_EMPTY];
Bb64 const* p = pos->pieces[them];
Bb64 const bqs = p[PIECE_QUEEN] | p[PIECE_BISHOP];
@@ -595,7 +595,7 @@ Bb64 pinning_lines_to_target(struct pos const* pos, Side8 us, Sq8 tsq)
static
Bb64 all_threats_from_side(struct pos const * pos, Side8 who)
{
Bb64 const occ = pos->occupied[SIDE_WHITE] | pos->occupied[SIDE_BLACK];
Bb64 const occ = ~(pos->pieces[SIDE_WHITE][PIECE_EMPTY] & pos->pieces[SIDE_BLACK][PIECE_EMPTY]);
Bb64 const* p = pos->pieces[who];
Bb64 t = 0ULL;