dweiss commented on a change in pull request #18:
URL: https://github.com/apache/lucene/pull/18#discussion_r594923342
##########
File path: lucene/core/src/java/org/apache/lucene/util/VectorUtil.java
##########
@@ -17,16 +17,123 @@
package org.apache.lucene.util;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.util.Base64;
+
/** Utilities for computations with numeric arrays */
public final class VectorUtil {
private VectorUtil() {}
+ // org.apache.lucene.util.VectorUtilSIMD#dotProduct(float[], float[])
+ private static final String SIMD_BASE64 =
+
"yv66vgAAADwAbQoAAgADBwAEDAAFAAYBABBqYXZhL2xhbmcvT2JqZWN0AQAGPGluaXQ+AQADKClW\n"
+ +
"BwAIAQAiamF2YS9sYW5nL0lsbGVnYWxBcmd1bWVudEV4Y2VwdGlvbhIAAAAKDAALAAwBABdtYWtl\n"
+ +
"Q29uY2F0V2l0aENvbnN0YW50cwEAFihJSSlMamF2YS9sYW5nL1N0cmluZzsKAAcADgwABQAPAQAV\n"
+ +
"KExqYXZhL2xhbmcvU3RyaW5nOylWCQARABIHABMMABQAFQEAJW9yZy9hcGFjaGUvbHVjZW5lL3V0\n"
+ +
"aWwvVmVjdG9yVXRpbFNJTUQBAAdTUEVDSUVTAQAkTGpkay9pbmN1YmF0b3IvdmVjdG9yL1ZlY3Rv\n"
+ +
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+ +
"ZXMBAAZsZW5ndGgBAAMoKUkKAB0AHgcAHwwAIAAhAQAgamRrL2luY3ViYXRvci92ZWN0b3IvRmxv\n"
+ +
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+ +
"amRrL2luY3ViYXRvci92ZWN0b3IvRmxvYXRWZWN0b3I7CwAXACMMACQAJQEACWxvb3BCb3VuZAEA\n"
+ +
"BChJKUkKAB0AJwwAKAApAQAJZnJvbUFycmF5AQBLKExqZGsvaW5jdWJhdG9yL3ZlY3Rvci9WZWN0\n"
+ +
"b3JTcGVjaWVzO1tGSSlMamRrL2luY3ViYXRvci92ZWN0b3IvRmxvYXRWZWN0b3I7CgAdACsMACwA\n"
+ +
"LQEAA211bAEAQShMamRrL2luY3ViYXRvci92ZWN0b3IvVmVjdG9yOylMamRrL2luY3ViYXRvci92\n"
+ +
"ZWN0b3IvRmxvYXRWZWN0b3I7CgAdAC8MADAALQEAA2FkZAkAMgAzBwA0DAA1ADYBACRqZGsvaW5j\n"
+ +
"dWJhdG9yL3ZlY3Rvci9WZWN0b3JPcGVyYXRvcnMBAANBREQBADJMamRrL2luY3ViYXRvci92ZWN0\n"
+ +
"b3IvVmVjdG9yT3BlcmF0b3JzJEFzc29jaWF0aXZlOwoAHQA4DAA5ADoBAAtyZWR1Y2VMYW5lcwEA\n"
+ +
"NShMamRrL2luY3ViYXRvci92ZWN0b3IvVmVjdG9yT3BlcmF0b3JzJEFzc29jaWF0aXZlOylGCQAd\n"
+ +
"ADwMAD0AFQEAEVNQRUNJRVNfUFJFRkVSUkVEAQAJU2lnbmF0dXJlAQA3TGpkay9pbmN1YmF0b3Iv\n"
+ +
"dmVjdG9yL1ZlY3RvclNwZWNpZXM8TGphdmEvbGFuZy9GbG9hdDs+OwEABENvZGUBAA9MaW5lTnVt\n"
+ +
"YmVyVGFibGUBABJMb2NhbFZhcmlhYmxlVGFibGUBAAR0aGlzAQAnTG9yZy9hcGFjaGUvbHVjZW5l\n"
+ +
"L3V0aWwvVmVjdG9yVXRpbFNJTUQ7AQAKZG90UHJvZHVjdAEAByhbRltGKUYBAAJ2YQEAIkxqZGsv\n"
+ +
"aW5jdWJhdG9yL3ZlY3Rvci9GbG9hdFZlY3RvcjsBAAJ2YgEAAnZjAQACdmQBAARhY2MxAQAEYWNj\n"
+ +
"MgEACnVwcGVyQm91bmQBAAFJAQABYQEAAltGAQABYgEAAWkBAANyZXMBAAFGAQANU3RhY2tNYXBU\n"
+ +
"YWJsZQcAUQEACDxjbGluaXQ+AQAKU291cmNlRmlsZQEAE1ZlY3RvclV0aWxTSU1ELmphdmEBABBC\n"
+ +
"b290c3RyYXBNZXRob2RzDwYAXQoAXgBfBwBgDAALAGEBACRqYXZhL2xhbmcvaW52b2tlL1N0cmlu\n"
+ +
"Z0NvbmNhdEZhY3RvcnkBAJgoTGphdmEvbGFuZy9pbnZva2UvTWV0aG9kSGFuZGxlcyRMb29rdXA7\n"
+ +
"TGphdmEvbGFuZy9TdHJpbmc7TGphdmEvbGFuZy9pbnZva2UvTWV0aG9kVHlwZTtMamF2YS9sYW5n\n"
+ +
"L1N0cmluZztbTGphdmEvbGFuZy9PYmplY3Q7KUxqYXZhL2xhbmcvaW52b2tlL0NhbGxTaXRlOwgA\n"
+ +
"YwEAHnZlY3RvciBkaW1lbnNpb25zIGRpZmZlcjogASE9AQEADElubmVyQ2xhc3NlcwcAZgEAMGpk\n"
+ +
"ay9pbmN1YmF0b3IvdmVjdG9yL1ZlY3Rvck9wZXJhdG9ycyRBc3NvY2lhdGl2ZQEAC0Fzc29jaWF0\n"
+ +
"aXZlBwBpAQAlamF2YS9sYW5nL2ludm9rZS9NZXRob2RIYW5kbGVzJExvb2t1cAcAawEAHmphdmEv\n"
+ +
"bGFuZy9pbnZva2UvTWV0aG9kSGFuZGxlcwEABkxvb2t1cAAhABEAAgAAAAEAGgAUABUAAQA+AAAA\n"
+ +
"AgA/AAMAAQAFAAYAAQBAAAAALwABAAEAAAAFKrcAAbEAAAACAEEAAAAGAAEAAAAZAEIAAAAMAAEA\n"
+ +
"AAAFAEMARAAAAAkARQBGAAEAQAAAAewABAALAAAA6Cq+K76fABS7AAdZKr4rvroACQAAtwANvwM9\n"
+ +
"C0YqvgWyABC5ABYBAGihAKiyABC4ABw6BLIAELgAHDoFsgAQKr6yABC5ABYBAGS5ACICADYGHBUG\n"
+ +
"ogBpsgAQKhy4ACY6B7IAECscuAAmOggZBBkHGQi2ACq2AC46BLIAECocsgAQuQAWAQBguAAmOgmy\n"
+ +
"ABArHLIAELkAFgEAYLgAJjoKGQUZCRkKtgAqtgAuOgUcBbIAELkAFgEAaGA9p/+XJRkEsgAxtgA3\n"
+ +
"GQWyADG2ADdiYkYcKr6iABMlKxwwKhwwamJGhAIBp//tJa4AAAADAEEAAABWABUAAAAhAAcAIgAY\n"
+ +
"ACQAGgAlABwAKAArACkAMwAqADsAKwBQACwAVgAtAGAALgBqAC8AeAAwAIsAMQCeADIArAAsALwA\n"
+ +
"NADQADYA1gA3AOAANgDmADkAQgAAAHAACwBgAEwARwBIAAcAagBCAEkASAAIAIsAIQBKAEgACQCe\n"
+ +
"AA4ASwBIAAoAMwCdAEwASAAEADsAlQBNAEgABQBQAIAATgBPAAYAAADoAFAAUQAAAAAA6ABSAFEA\n"
+ +
"AQAaAM4AUwBPAAIAHADMAFQAVQADAFYAAAAgAAUY/wA3AAcHAFcHAFcBAgcAHQcAHQEAAPsAa/gA\n"
+ +
"ExUACABYAAYAAQBAAAAAHwABAAAAAAAHsgA7swAQsQAAAAEAQQAAAAYAAQAAABoAAwBZAAAAAgBa\n"
+ + "AFsAAAAIAAEAXAABAGIAZAAAABIAAgBlADIAZwYJAGgAagBsABk=";
+
+ private static final MethodHandle DOTPRODUCT;
+ private static final MethodType DOTPRODUCT_TYPE =
+ MethodType.methodType(float.class, float[].class, float[].class);
+
+ static final class Loader extends ClassLoader {
+ Loader(ClassLoader parent) {
+ super(parent);
+ }
+
+ public Class<?> define(byte[] code) {
+ return defineClass("org.apache.lucene.util.VectorUtilSIMD", code, 0,
code.length);
+ }
+ }
+
+ /**
+ * True if vectorized dot product is supported.
+ *
+ * <p>For this to work, you need java 16, and you need to opt-in by passing
{@code --add-modules
+ * jdk.incubator.vector} to the java command line.
+ */
+ public static final boolean DOTPRODUCT_VECTORIZATION_SUPPORTED;
+
+ static {
+ MethodHandle impl = null;
+ boolean vectorSupported = false;
+
+ try {
+ impl =
+ MethodHandles.lookup().findStatic(VectorUtil.class,
"dotProductScalar", DOTPRODUCT_TYPE);
+ } catch (NoSuchMethodException | IllegalAccessException e) {
+ throw new RuntimeException(e);
+ }
+
+ try {
+ Class<?> clazz =
Review comment:
This doesn't require additional permissions (custom class loader
definition)?
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