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add microbenchmarks to DremFrem

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This commit is contained in:
katkerem 2026-04-02 16:53:43 +01:00
parent 64fdfe71ca
commit b47115d952
1 changed files with 25 additions and 2 deletions
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27
test/micro/org/openjdk/bench/vm/floatingpoint/DremFrem.java
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@ -1,6 +1,7 @@
/*
* Copyright (c) 2023, Azul Systems, Inc. All rights reserved.
* Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
* Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -44,8 +45,8 @@ import java.util.concurrent.TimeUnit;
@State(Scope.Thread)
public class DremFrem {
private static final int DEFAULT_X_RANGE = 1 << 11;
private static final int DEFAULT_Y_RANGE = 1 << 11;
private static final int DEFAULT_X_RANGE = 1 << 16;
private static final int DEFAULT_Y_RANGE = 1 << 8;
private static boolean regressionValue = false;
@Benchmark
@ -73,4 +74,26 @@ public class DremFrem {
}
}
}
@Benchmark
@OperationsPerInvocation(DEFAULT_X_RANGE)
public void calcDoubleConstDivisor() {
double sum = 0;
for (int i = 0; i < DEFAULT_X_RANGE; i++) {
double x = i;
sum += (13.0D * x * x * x) % 42.0D;
}
regressionValue = sum % 2 == 1;
}
@Benchmark
@OperationsPerInvocation(DEFAULT_X_RANGE)
public void calcDoubleConstDivisorSimple() {
double sum = 0;
for (int i = 0; i < DEFAULT_X_RANGE; i++) {
double x = i;
sum += x % 42.0D;
}
regressionValue = sum % 2 == 1;
}
}