From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: tr7zw <tr7zw@live.de>
Date: Mon, 11 May 2020 21:50:18 +0200
Subject: [PATCH] lithium MixinAxisCycleDirection


diff --git a/src/main/java/net/minecraft/server/EnumAxisCycle.java b/src/main/java/net/minecraft/server/EnumAxisCycle.java
index a7c2543fdd4d5f6a04c45ec42472837ccaea9619..d05cddcc90e220c42548b2eb7b190fc63e9d51f5 100644
--- a/src/main/java/net/minecraft/server/EnumAxisCycle.java
+++ b/src/main/java/net/minecraft/server/EnumAxisCycle.java
@@ -24,14 +24,27 @@ public enum EnumAxisCycle {
             return enumdirection_enumaxis.a(k, i, j);
         }
 
+        /**
+         * The JVM has difficulty optimizing these functions due to the use of dynamic dispatch. They can trivially be
+         * implemented as a simple switch lookup table.
+         */
         @Override
         public EnumDirection.EnumAxis a(EnumDirection.EnumAxis enumdirection_enumaxis) {
-            return null.d[Math.floorMod(enumdirection_enumaxis.ordinal() + 1, 3)];
+			switch (enumdirection_enumaxis) {
+			case X:
+				return EnumDirection.EnumAxis.Y;
+			case Y:
+				return EnumDirection.EnumAxis.Z;
+			case Z:
+				return EnumDirection.EnumAxis.X;
+			}
+
+			throw new IllegalArgumentException();
         }
 
         @Override
         public EnumAxisCycle a() {
-            return null.BACKWARD;
+            return BACKWARD;
         }
     },
     BACKWARD {
@@ -42,12 +55,21 @@ public enum EnumAxisCycle {
 
         @Override
         public EnumDirection.EnumAxis a(EnumDirection.EnumAxis enumdirection_enumaxis) {
-            return null.d[Math.floorMod(enumdirection_enumaxis.ordinal() - 1, 3)];
+			switch (enumdirection_enumaxis) {
+			case X:
+				return EnumDirection.EnumAxis.Z;
+			case Y:
+				return EnumDirection.EnumAxis.X;
+			case Z:
+				return EnumDirection.EnumAxis.Y;
+			}
+
+			throw new IllegalArgumentException();
         }
 
         @Override
         public EnumAxisCycle a() {
-            return null.FORWARD;
+            return FORWARD;
         }
     };