Add SIMD Support for Java 21 (#1499)

Author: rockfordroeNG

patches/api/0001-Pufferfish-API-Changes.patch

@@ -20,7 +20,7 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 diff --git a/build.gradle.kts b/build.gradle.kts
-index bf01892c248b988531d21d9fb0f74d0adf2205ac..80833c13a2d19e31d6f648e7ef5b3456025e767e 100644
+index 66bcd8f9a8fce8f920a0f1dd7ae0a2937da68e80..c43eb3099747b9f1155b918ca818487b63488538 100644
 --- a/build.gradle.kts
 +++ b/build.gradle.kts
 @@ -51,6 +51,7 @@ dependencies {
@@ -480,7 +480,7 @@ index eaefbb00e9993d54906cc8cf35cf753c0d6c7707..301e82369603f3dd6e6c1bd380da4bac
 
              if (cloader instanceof PluginClassLoader) {
 diff --git a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
-index f9b57b872780aa6b9b959494874b57c7a8ff0c53..90953bfc81168068a281be4d2d3942d5e7dd69ff 100644
+index 7e4f7cb2afbc145e532285c793573ad107bc3033..12449e18180d604e9cbbc744da74a8b222a18e1f 100644
 --- a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
 +++ b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
 @@ -50,6 +50,8 @@ public final class PluginClassLoader extends URLClassLoader implements io.paperm

patches/api/0002-Fix-pufferfish-issues.patch

@@ -4,6 +4,19 @@ Date: Tue, 4 Jan 2022 23:05:41 -0600
 Subject: [PATCH] Fix pufferfish issues
 
 
+diff --git a/src/main/java/gg/pufferfish/pufferfish/simd/SIMDChecker.java b/src/main/java/gg/pufferfish/pufferfish/simd/SIMDChecker.java
+index ab5fea0b03224bf249352ce340e94704ff713345..3441cdad70da1bd523c5933b1a914688718c2657 100644
+--- a/src/main/java/gg/pufferfish/pufferfish/simd/SIMDChecker.java
++++ b/src/main/java/gg/pufferfish/pufferfish/simd/SIMDChecker.java
+@@ -15,7 +15,7 @@ public class SIMDChecker {
+ 	@Deprecated
+ 	public static boolean canEnable(Logger logger) {
+ 		try {
+-			if (SIMDDetection.getJavaVersion() != 17 && SIMDDetection.getJavaVersion() != 18 && SIMDDetection.getJavaVersion() != 19) {
++			if (SIMDDetection.getJavaVersion() < 17 || SIMDDetection.getJavaVersion() > 21) {
+ 				return false;
+ 			} else {
+ 				SIMDDetection.testRun = true;
 diff --git a/src/test/java/org/bukkit/AnnotationTest.java b/src/test/java/org/bukkit/AnnotationTest.java
 index 88f1ca89fa640a686231b8eec87e70419b2d73ef..d6b91c49a267c89d7df2ddee7ccfe64675d117be 100644
 --- a/src/test/java/org/bukkit/AnnotationTest.java

patches/server/0003-Fix-pufferfish-issues.patch

@@ -18,9 +18,27 @@ index 7e82d2c6a6085a5ea335ba9ef2a5ec3f5a37e787..32366253c04c493135f2b22d1940f836
 +    jvmArgs("-DPaper.isRunDev=true")
  }
 diff --git a/src/main/java/gg/pufferfish/pufferfish/PufferfishConfig.java b/src/main/java/gg/pufferfish/pufferfish/PufferfishConfig.java
-index f6a3364175476c57a7763a087ff55e1689474800..5e01bfdad663656168604fc878a993dd910bf45b 100644
+index f6a3364175476c57a7763a087ff55e1689474800..8b8fe02b9db5192a3adb8d4a3bb3c2105f90544d 100644
 --- a/src/main/java/gg/pufferfish/pufferfish/PufferfishConfig.java
 +++ b/src/main/java/gg/pufferfish/pufferfish/PufferfishConfig.java
+@@ -86,7 +86,7 @@ public class PufferfishConfig {
+ 		// Attempt to detect vectorization
+ 		try {
+ 			SIMDDetection.isEnabled = SIMDDetection.canEnable(PufferfishLogger.LOGGER);
+-			SIMDDetection.versionLimited = SIMDDetection.getJavaVersion() != 17 && SIMDDetection.getJavaVersion() != 18 && SIMDDetection.getJavaVersion() != 19;
++			SIMDDetection.versionLimited = SIMDDetection.getJavaVersion() < 17 || SIMDDetection.getJavaVersion() > 21;
+ 		} catch (NoClassDefFoundError | Exception ignored) {
+ 			ignored.printStackTrace();
+ 		}
+@@ -94,7 +94,7 @@ public class PufferfishConfig {
+ 		if (SIMDDetection.isEnabled) {
+ 			PufferfishLogger.LOGGER.info("SIMD operations detected as functional. Will replace some operations with faster versions.");
+ 		} else if (SIMDDetection.versionLimited) {
+-			PufferfishLogger.LOGGER.warning("Will not enable SIMD! These optimizations are only safely supported on Java 17, Java 18, and Java 19.");
++			PufferfishLogger.LOGGER.warning("Will not enable SIMD! These optimizations are only safely supported on Java 17 through Java 21.");
+ 		} else {
+ 			PufferfishLogger.LOGGER.warning("SIMD operations are available for your server, but are not configured!");
+ 			PufferfishLogger.LOGGER.warning("To enable additional optimizations, add \"--add-modules=jdk.incubator.vector\" to your startup flags, BEFORE the \"-jar\".");
 @@ -232,7 +232,7 @@ public class PufferfishConfig {
      public static int activationDistanceMod;
 
@@ -62,7 +80,7 @@ index 62ad086b5b07303d920fdb3534a556673ef51f71..15aaa270e51b9194596e7ed5061c85c9
 
      private int currentIceAndSnowTick = 0; protected void resetIceAndSnowTick() { this.currentIceAndSnowTick = this.randomTickRandom.nextInt(16); } // Pufferfish
 diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
-index d18296739a833dbe6c3bf45e00d5d5c2e80099ac..d25dd9018eff5f3817c1b56f49632cc0a9388b8e 100644
+index 5c5c8fbd562b46f8699be97353447eaab36c007a..385253bddf50c290317b6d0f283331edf515badd 100644
 --- a/src/main/java/net/minecraft/world/entity/Entity.java
 +++ b/src/main/java/net/minecraft/world/entity/Entity.java
 @@ -825,7 +825,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, S