From 1c4c158053b480a60d8a1d522b943beffd2782d1 Mon Sep 17 00:00:00 2001
From: dogeystamp <dogeystamp@disroot.org>
Date: Sun, 3 Nov 2024 11:42:19 -0500
Subject: [PATCH] perf: borrow in the evalscore piece changes

---
 src/eval.rs | 12 ++++++------
 src/lib.rs  |  4 ++--
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/src/eval.rs b/src/eval.rs
index 16426fc..8936407 100644
--- a/src/eval.rs
+++ b/src/eval.rs
@@ -52,14 +52,14 @@ pub(crate) mod eval_score {
         /// Add/remove the value of a piece based on the PST.
         ///
         /// Use +1 as sign to add, -1 to delete.
-        fn change_piece(&mut self, pc: ColPiece, sq: Square, sign: i8) {
+        fn change_piece(&mut self, pc: &ColPiece, sq: &Square, sign: i8) {
             assert!(sign == 1 || sign == -1);
             let tables = [
-                (&mut self.midgame, PST_MIDGAME),
-                (&mut self.endgame, PST_ENDGAME),
+                (&mut self.midgame, &PST_MIDGAME),
+                (&mut self.endgame, &PST_ENDGAME),
             ];
             for (phase, pst) in tables {
-                phase.score += pst[pc.pc][pc.col][sq] * EvalInt::from(pc.col.sign() * sign);
+                phase.score += pst[pc.pc][pc.col][*sq] * EvalInt::from(pc.col.sign() * sign);
             }
 
             use crate::Piece::*;
@@ -73,12 +73,12 @@ pub(crate) mod eval_score {
         }
 
         /// Remove the value of a piece on a square.
-        pub fn del_piece(&mut self, pc: ColPiece, sq: Square) {
+        pub fn del_piece(&mut self, pc: &ColPiece, sq: &Square) {
             self.change_piece(pc, sq, -1);
         }
 
         /// Add the value of a piece on a square.
-        pub fn add_piece(&mut self, pc: ColPiece, sq: Square) {
+        pub fn add_piece(&mut self, pc: &ColPiece, sq: &Square) {
             self.change_piece(pc, sq, 1);
         }
     }
diff --git a/src/lib.rs b/src/lib.rs
index da59360..3d23516 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -469,7 +469,7 @@ impl Board {
         let pl = &mut self[pc.col];
         pl[pc.into()].on_sq(sq);
         *self.mail.sq_mut(sq) = Some(pc);
-        self.eval.add_piece(pc, sq);
+        self.eval.add_piece(&pc, &sq);
         dest_pc
     }
 
@@ -487,7 +487,7 @@ impl Board {
             let pl = &mut self[pc.col];
             pl[pc.into()].off_sq(sq);
             *self.mail.sq_mut(sq) = None;
-            self.eval.del_piece(pc, sq);
+            self.eval.del_piece(&pc, &sq);
             Some(pc)
         } else {
             None