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CopySign.cs
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CopySign.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using BenchmarkDotNet.Attributes;
namespace System.MathBenchmarks
{
public partial class Single
{
// Tests Math.CopySign(float) over 5000 iterations for the domain -1, +1
private const float copySignDelta = 0.0004f;
private const int copySignExpectedResult = 0;
[Benchmark]
public void CopySign() => CopySignTest();
public static void CopySignTest()
{
float result = 1.0f, value = -1.0f;
for (int iteration = 0; iteration < MathTests.Iterations; iteration++)
{
value += copySignDelta;
result += MathF.CopySign(result, value);
}
if (result != copySignExpectedResult)
{
throw new Exception($"Expected Result {copySignExpectedResult}; Actual Result {result}");
}
}
}
}