93 lines
3.0 KiB
Diff
93 lines
3.0 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: MrHua269 <wangxyper@163.com>
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Date: Sun, 12 Jan 2025 14:00:28 +0800
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Subject: [PATCH] Pufferfish SIMD Utilities
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diff --git a/src/main/java/gg/pufferfish/pufferfish/simd/SIMDChecker.java b/src/main/java/gg/pufferfish/pufferfish/simd/SIMDChecker.java
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new file mode 100644
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index 0000000000000000000000000000000000000000..f00c008c03e2533f568085838cf13cb9b5b32cd9
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--- /dev/null
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+++ b/src/main/java/gg/pufferfish/pufferfish/simd/SIMDChecker.java
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@@ -0,0 +1,39 @@
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+package gg.pufferfish.pufferfish.simd;
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+
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+import jdk.incubator.vector.FloatVector;
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+import jdk.incubator.vector.IntVector;
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+import jdk.incubator.vector.VectorSpecies;
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+import org.slf4j.Logger;
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+
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+/**
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+ * Basically, java is annoying and we have to push this out to its own class.
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+ */
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+@Deprecated
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+public class SIMDChecker {
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+
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+ @Deprecated
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+ public static boolean canEnable(Logger logger) {
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+ try {
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+ if (SIMDDetection.getJavaVersion() < 17 || SIMDDetection.getJavaVersion() > 21) {
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+ return false;
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+ } else {
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+ SIMDDetection.testRun = true;
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+
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+ VectorSpecies<Integer> ISPEC = IntVector.SPECIES_PREFERRED;
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+ VectorSpecies<Float> FSPEC = FloatVector.SPECIES_PREFERRED;
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+
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+ logger.info("Max SIMD vector size on this system is {} bits (int)", ISPEC.vectorBitSize());
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+ logger.info("Max SIMD vector size on this system is " + FSPEC.vectorBitSize() + " bits (float)");
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+
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+ if (ISPEC.elementSize() < 2 || FSPEC.elementSize() < 2) {
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+ logger.warn("SIMD is not properly supported on this system!");
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+ return false;
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+ }
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+
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+ return true;
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+ }
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+ } catch (NoClassDefFoundError | Exception ignored) {} // Basically, we don't do anything. This lets us detect if it's not functional and disable it.
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+ return false;
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+ }
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+
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+}
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diff --git a/src/main/java/gg/pufferfish/pufferfish/simd/SIMDDetection.java b/src/main/java/gg/pufferfish/pufferfish/simd/SIMDDetection.java
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new file mode 100644
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index 0000000000000000000000000000000000000000..cd953435a6179eaae7c9cc250a791cae26c5567b
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--- /dev/null
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+++ b/src/main/java/gg/pufferfish/pufferfish/simd/SIMDDetection.java
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@@ -0,0 +1,35 @@
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+package gg.pufferfish.pufferfish.simd;
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+
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+import org.slf4j.Logger;
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+
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+@Deprecated
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+public class SIMDDetection {
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+
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+ public static boolean isEnabled = false;
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+ public static boolean versionLimited = false;
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+ public static boolean testRun = false;
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+
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+ @Deprecated
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+ public static boolean canEnable(Logger logger) {
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+ try {
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+ return SIMDChecker.canEnable(logger);
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+ } catch (NoClassDefFoundError | Exception ignored) {
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+ return false;
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+ }
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+ }
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+
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+ @Deprecated
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+ public static int getJavaVersion() {
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+ // https://stackoverflow.com/a/2591122
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+ String version = System.getProperty("java.version");
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+ if(version.startsWith("1.")) {
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+ version = version.substring(2, 3);
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+ } else {
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+ int dot = version.indexOf(".");
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+ if(dot != -1) { version = version.substring(0, dot); }
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+ }
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+ version = version.split("-")[0]; // Azul is stupid
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+ return Integer.parseInt(version);
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+ }
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+
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+}
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