1 files changed, 28 insertions(+), 0 deletions(-)

M src/attack.zig

@@ 254,3 254,31 @@ pub fn rookAttackRays(rook: Square, block: u64) u64 {
     }
     return resetBit(bitboard, rook);
 }
+
+pub const num_rook_relative_occupancies = numRookRelativeOccupancies();
+
+fn numRookRelativeOccupancies() [64]u64 {
+    comptime {
+        @setEvalBranchQuota(2000);
+        var occupancies: [64]u64 = undefined;
+        var i = 0;
+        while (i < 64) : (i += 1) {
+            occupancies[i] = @popCount(u64, maskRookOccupancy(@intToEnum(Square, i)));
+        }
+        return occupancies;
+    }
+}
+
+pub const num_bishop_relative_occupancies = numBishopRelativeOccupancies();
+
+fn numBishopRelativeOccupancies() [64]u64 {
+    comptime {
+        @setEvalBranchQuota(2000);
+        var occupancies: [64]u64 = undefined;
+        var i = 0;
+        while (i < 64) : (i += 1) {
+            occupancies[i] = @popCount(u64, maskBishopOccupancy(@intToEnum(Square, i)));
+        }
+        return occupancies;
+    }
+}