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8248188: Add IntrinsicCandidate and API for Base64 decoding

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8248188: Add IntrinsicCandidate and API for Base64 decoding, add Power64LE intrinsic implementation.

This patch set encompasses the following commits:

Adds a new intrinsic candidate to the java.lang.Base64 class - decodeBlock(), and provides a flexible API for the intrinsic. The API is similar to the existing encodeBlock intrinsic.

Adds the code in HotSpot to check and martial the new intrinsic's arguments to the arch-specific intrinsic implementation.

Adds a Power64LE-specific implementation of the decodeBlock intrinsic.

Adds a JMH microbenchmark for both Base64 encoding and encoding.

Enhances the JTReg hotspot intrinsic "TestBase64.java" regression test to more fully test both decoding and encoding.

Reviewed-by: rriggs, mdoerr, kvn
This commit is contained in:
Corey Ashford 2020-11-11 21:31:07 +00:00 • committed by Martin Doerr
parent 59965c17b4
commit ccb48b7203
25 changed files with 1901 additions and 27 deletions
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91
test/micro/org/openjdk/bench/java/util/Base64VarLenDecode.java Normal file
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/*
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package org.openjdk.micro.bench.java.util;
import org.openjdk.jmh.annotations.*;
import java.util.*;
public class Base64VarLenDecode {
@State(Scope.Thread)
public static class MyState {
@Setup(Level.Trial)
public void doSetupTrial() {
ran = new Random(10101); // fixed seed for repeatability
encoder = Base64.getEncoder();
decoder = Base64.getDecoder();
System.out.println("Do Trial Setup");
}
@Setup(Level.Invocation)
public void doSetupInvocation() {
bin_src_len = 8 + ran.nextInt(20000);
base64_len = ((bin_src_len + 2) / 3) * 4;
unencoded = new byte[bin_src_len];
encoded = new byte[base64_len];
decoded = new byte[bin_src_len];
ran.nextBytes(unencoded);
encoder.encode(unencoded, encoded);
}
@TearDown(Level.Invocation)
public void doTearDownInvocation() {
// This isn't really a teardown. It's a check for correct functionality.
// Each iteration should produce a correctly decoded buffer that's equal
// to the unencoded data.
if (!Arrays.equals(unencoded, decoded)) {
System.out.println("Original data and decoded data are not equal!");
for (int j = 0; j < unencoded.length; j++) {
if (unencoded[j] != decoded[j]) {
System.out.format("%06x: %02x %02x\n", j, unencoded[j], decoded[j]);
}
}
System.exit(1);
}
}
public Random ran;
public Base64.Encoder encoder;
public Base64.Decoder decoder;
public int bin_src_len;
public int base64_len;
public byte[] unencoded;
public byte[] encoded;
public byte[] decoded;
}
@Benchmark
public void decodeMethod(MyState state) {
state.decoder.decode(state.encoded, state.decoded);
}
}