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CosPi.cs
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CosPi.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 float.CosPi(float) over 5000 iterations for the domain 0, PI
private const float cosPiDelta = 0.000628318531f;
private const float cosPiExpectedResult = -218.823822f;
[Benchmark]
public void CosPi() => CosPiTest();
public static void CosPiTest()
{
float result = 0.0f, value = 0.0f;
for (int iteration = 0; iteration < MathTests.Iterations; iteration++)
{
value += cosPiDelta;
result += float.CosPi(value);
}
float diff = MathF.Abs(cosPiExpectedResult - result);
if (diff > MathTests.SingleEpsilon)
{
throw new Exception($"Expected Result {cosPiExpectedResult,10:g9}; Actual Result {result,10:g9}");
}
}
}
}