From f913d0ff656046e996890ec9ef8c8ea5157abe92 Mon Sep 17 00:00:00 2001
From: Bjorn Einar Bjarntes <bjartnes@gmail.com>
Date: Sun, 19 Dec 2021 13:29:54 +0100
Subject: [PATCH] more optimization

---
 .gitignore         | 1 +
 .vscode/tasks.json | 4 ++--
 src/main.c         | 6 +++---
 3 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/.gitignore b/.gitignore
index bd4a4be..cc21340 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,6 +10,7 @@ disk/
 
 *.o
 *.pet
+*.avi
 *.prg
 *.d81
 *.c64
diff --git a/.vscode/tasks.json b/.vscode/tasks.json
index 25d4098..042f4e8 100644
--- a/.vscode/tasks.json
+++ b/.vscode/tasks.json
@@ -17,9 +17,9 @@
 			"command": " x64sc.exe out/program.c64"
 		},
 		{
-			"label": "Build & run program",
+			"label": "Build & run program with optimization",
 			"type": "shell",
-			"command": "cl65 src/main.c -o out/program.c64 && x64sc.exe out/program.c64",
+			"command": "cl65 src/main.c -o out/program.c64 -Oi && x64sc.exe out/program.c64",
 			"problemMatcher": []
 		}
 	]
diff --git a/src/main.c b/src/main.c
index ca88569..198afe5 100644
--- a/src/main.c
+++ b/src/main.c
@@ -30,18 +30,18 @@ void setAndClearHiRes(){
 }
 
 BYTE isPositionWhite() {
-    ad = 0x2000+(320 * (BYTE)(y >> 3)) + (y & 7)+8 * (BYTE)(x/8);
+    ad = 0x2000+(320 * (BYTE)(y >> 3)) + (y & 7)+8 * (BYTE)(x>>3);
     return *(short*)(ad) & 1 << ((7-(x & 7)));
 }
 
 // https://archive.org/details/The_Graphics_Book_for_the_Commodore_64/page/n129/
 void setPositionWhite() {
-    ad = 0x2000+(320 * (y >> 3)) + (y & 7)+8 * (x/8);
+    ad = 0x2000+(320 * (y >> 3)) + (y & 7)+8 * (x>>3);
     *(short*)(ad) = *(short*)(ad) | 1 << ((7-(x & 7)));
 }
 
 void setPositionBlack() {
-    ad = 0x2000+320 * (y >> 3) + (y & 7)+8 * (x/8);
+    ad = 0x2000+320 * (y >> 3) + (y & 7)+8 * (x>>3);
     *(short*)(ad) = (*(short*)(ad)) & ~(1 << ((7-(x & 7))));
 }