From ee746d1cea529af1dba2f1cc44eb995225c121f2 Mon Sep 17 00:00:00 2001
From: Dennis Ranke <dennis.ranke@gmail.com>
Date: Wed, 10 Nov 2021 22:48:49 +0100
Subject: [PATCH] optimize skipahead some more

---
 examples/wasm4/skipahead.cwa | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/examples/wasm4/skipahead.cwa b/examples/wasm4/skipahead.cwa
index e12496b..cca4c88 100644
--- a/examples/wasm4/skipahead.cwa
+++ b/examples/wasm4/skipahead.cwa
@@ -21,11 +21,11 @@ fn xorshift(state: i32) -> i32 {
 export fn update() {
     let y: i32;
     loop lines {
-        let z = (200 as f32 / (y := y + 1) as f32 + pz) as i32;
-        let x = (xorshift(xorshift(xorshift(z))) & 3) as f32 / 2 as f32 - px;
-        let w = 6 as f32 / sqrt(z as f32);
-        let rx = 80 + (y as f32 * x) as i32;
-        let rw = (y as f32 * w) as i32;
+        let defer z = (200 as f32 / (y := y + 1) as f32 + pz) as i32;
+        let defer x = (xorshift(xorshift(xorshift(z))) & 3) as f32 / 2 as f32 - px;
+        let defer w = 6 as f32 / sqrt(z as f32);
+        let defer rx = 80 + (y as f32 * x) as i32;
+        let defer rw = (y as f32 * w) as i32;
         
         let defer c = ((z & 1) + 2) * 17;
         ?20 = c;
@@ -34,7 +34,7 @@ export fn update() {
         rect(rx, y + 1, rw, y / 9);
 
         if y == 120 & py > 0.0 {
-            if x+w < 0.0 | x > 0.0 {
+            if x < -w | x > 0.0 {
                 return;
             }
             py = 0.0;
@@ -52,10 +52,7 @@ export fn update() {
     let defer pad = ?22;
     let defer control_speed = 0.03;
     px = px + (((pad >> 5) & 1) - ((pad >> 4) & 1)) as f32 * control_speed;
-    if pad & 1 {
-        s = s - f - control_speed;
-    }
-    s = s + 0.1;
+    s = s + 0.1 - (f + control_speed) * (pad & 1) as f32;
     py = py + s;
     pz = pz + 0.05;
     f = f * 0.7;