Reuse computed ray bitboard in update_piece_threats

zungur · zungur · commit f8e842494aed · 2026-06-11T17:34:45.000-07:00
Reuse the already-computed ray instead of calling ray_pass_bb a second
time with identical arguments.

No functional change
diff --git a/src/position.cpp b/src/position.cpp
@@ -1222,7 +1222,7 @@ void Position::update_piece_threats(Piece               pc,
             const Bitboard discovered = ray & (rAttacks | bAttacks) & occupiedNoK;
 
             assert(!more_than_one(discovered));
-            if (discovered && (ray_pass_bb(sliderSq, s) & noRaysContaining) != noRaysContaining)
+            if (discovered && (ray & noRaysContaining) != noRaysContaining)
             {
                 const Square threatenedSq = lsb(discovered);
                 const Piece  threatenedPc = piece_on(threatenedSq);

Original file line number	Diff line number	Diff line change
`@@ -1222,7 +1222,7 @@ void Position::update_piece_threats(Piece pc,`
`1222`	`1222`	`const Bitboard discovered = ray & (rAttacks \| bAttacks) & occupiedNoK;`
`1223`	`1223`
`1224`	`1224`	`assert(!more_than_one(discovered));`
`1225`		`- if (discovered && (ray_pass_bb(sliderSq, s) & noRaysContaining) != noRaysContaining)`
	`1225`	`+ if (discovered && (ray & noRaysContaining) != noRaysContaining)`
`1226`	`1226`	`{`
`1227`	`1227`	`const Square threatenedSq = lsb(discovered);`
`1228`	`1228`	`const Piece threatenedPc = piece_on(threatenedSq);`