From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: MartijnMuijsers <martijnmuijsers@live.nl>
Date: Thu, 24 Nov 2022 01:19:12 +0100
Subject: [PATCH] SIMD support

License: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)

This patch is based on the following patch:
"Add SIMD utilities"
By: Kevin Raneri <kevin.raneri@gmail.com>
As part of: Pufferfish (https://github.com/pufferfish-gg/Pufferfish)
Licensed under: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)

diff --git a/build.gradle.kts b/build.gradle.kts
index 1a29eac414ad97c36fa92d65ea230b4f537492d1..69b35adc97166d540a583c1a467ee1651df873e7 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -55,7 +55,14 @@ dependencies {
     implementation("io.netty:netty-all:4.1.77.Final"); // Paper - Bump netty
 }
 
-val craftbukkitPackageVersion = "1_19_R1" // Paper
+val craftbukkitPackageVersion = "1_19_R1" // Paper// Pufferfish Start
+
+// Gale start - Pufferfish - SIMD support
+tasks.withType<JavaCompile> {
+    val compilerArgs = options.compilerArgs
+    compilerArgs.add("--add-modules=jdk.incubator.vector")
+}
+// Gale end - Pufferfish - SIMD support
 tasks.jar {
     archiveClassifier.set("dev")
 
diff --git a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
index acb9e2f67a5ffe46136e1687561630f96b27ce06..6dbd6d6339ef61db4eb961330e6a4df5a401f88b 100644
--- a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
+++ b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
@@ -14,6 +14,8 @@ import java.util.Locale;
 import java.util.Optional;
 import java.util.function.BooleanSupplier;
 import javax.annotation.Nullable;
+
+import gg.pufferfish.pufferfish.simd.SIMDDetection;
 import net.minecraft.DefaultUncaughtExceptionHandler;
 import net.minecraft.DefaultUncaughtExceptionHandlerWithName;
 import net.minecraft.SharedConstants;
@@ -50,6 +52,7 @@ import net.minecraft.world.level.GameRules;
 import net.minecraft.world.level.GameType;
 import net.minecraft.world.level.block.entity.SkullBlockEntity;
 import net.minecraft.world.level.storage.LevelStorageSource;
+import org.galemc.gale.configuration.GaleGlobalConfiguration;
 import org.slf4j.Logger;
 
 // CraftBukkit start
@@ -226,6 +229,21 @@ public class DedicatedServer extends MinecraftServer implements ServerInterface
         io.papermc.paper.brigadier.PaperBrigadierProviderImpl.INSTANCE.getClass(); // init PaperBrigadierProvider
         // Paper end
 
+        // Gale start - Pufferfish - SIMD support
+        // Attempt to detect vectorization
+        try {
+            SIMDDetection.isEnabled = SIMDDetection.canEnable(LOGGER, GaleGlobalConfiguration.get().smallOptimizations.simd.logVectorSizesToConsole);
+        } catch (NoClassDefFoundError | Exception ignored) {}
+
+        if (!SIMDDetection.isEnabled && !SIMDDetection.unsupportingLaneSize && GaleGlobalConfiguration.get().smallOptimizations.simd.warnIfDisabled) {
+            LOGGER.warn("SIMD operations are available for your server, but are not configured!");
+            LOGGER.warn("To enable additional optimizations, add \"--add-modules=jdk.incubator.vector\" to your startup flags, BEFORE the \"-jar\".");
+            LOGGER.warn("If you have already added this flag, then SIMD operations are not supported on your JVM or CPU.");
+            LOGGER.warn("Debug: Java: " + System.getProperty("java.version") + ", test run: " + SIMDDetection.testRun);
+            LOGGER.warn("If you would like to disable this message, set simd.warn-if-disabled to false in gale-global.yml");
+        }
+        // Gale start - Pufferfish - SIMD support
+
         this.setPvpAllowed(dedicatedserverproperties.pvp);
         this.setFlightAllowed(dedicatedserverproperties.allowFlight);
         this.setMotd(dedicatedserverproperties.motd);
diff --git a/src/main/java/org/galemc/gale/configuration/GaleGlobalConfiguration.java b/src/main/java/org/galemc/gale/configuration/GaleGlobalConfiguration.java
index 5bb57e160b446d96147fe1f8b2cfa8e26eb8e651..e9e9bfc76786525e0a6b41ba52776e93efc1ff65 100644
--- a/src/main/java/org/galemc/gale/configuration/GaleGlobalConfiguration.java
+++ b/src/main/java/org/galemc/gale/configuration/GaleGlobalConfiguration.java
@@ -43,6 +43,14 @@ public class GaleGlobalConfiguration extends ConfigurationPart {
 
         public boolean disableVanillaProfiler = true; // Gale - Airplane - config to disable vanilla profiler
 
+        // Gale start - Pufferfish - SIMD support
+        public Simd simd;
+        public class Simd extends ConfigurationPart {
+            public boolean warnIfDisabled = true;
+            public boolean logVectorSizesToConsole = false;
+        }
+        // Gale end - Pufferfish - SIMD support
+
     }
 
 }