From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Martijn Muijsers <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)
Gale - https://galemc.org

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 c2f60f3f638d8a94046d20ff1dfca316a3395861..9839d38652d04fcc3e97a85a9120a1848e203de6 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -63,6 +63,7 @@ tasks.withType<JavaCompile> {
     compilerArgs.add("-Xlint:-module")
     compilerArgs.add("-Xlint:-removal")
     compilerArgs.add("-Xlint:-dep-ann")
+    compilerArgs.add("--add-modules=jdk.incubator.vector") // Gale - Pufferfish - SIMD support
 }
 // Gale end - hide irrelevant compilation warnings
 
diff --git a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
index d2b14c65e6a925ba4a29d48bcedc0d9504092052..007fe6820e208c04e81acbd7bb7eaf0a22f6f64f 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;
@@ -51,6 +53,7 @@ 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.command.GaleCommands;
+import org.galemc.gale.configuration.GaleGlobalConfiguration;
 import org.slf4j.Logger;
 
 // CraftBukkit start
@@ -228,6 +231,21 @@ 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 5bf0c4d9cf136cd19d87ee04a834413240eec339..a1d5197a5e7a00fad1025741ef8adcea45d42533 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
+
     }
 
 }