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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 Microsoft.Xunit.Performance;
namespace Functions
{
public static partial class MathTests
{
// Tests MathF.Pow(float, float) over 5000 iterations for the domain x: +2, +1; y: -2, -1
private const float powSingleDeltaX = -0.0004f;
private const float powSingleDeltaY = 0.0004f;
private const float powSingleExpectedResult = 4659.46274f;
[Benchmark]
public static void PowSingleBenchmark()
{
foreach (var iteration in Benchmark.Iterations)
{
using (iteration.StartMeasurement())
{
PowSingleTest();
}
}
}
public static void PowSingleTest()
{
var result = 0.0f; var valueX = 2.0f; var valueY = -2.0f;
for (var iteration = 0; iteration < iterations; iteration++)
{
valueX += powSingleDeltaX; valueY += powSingleDeltaY;
result += MathF.Pow(valueX, valueY);
}
var diff = MathF.Abs(powSingleExpectedResult - result);
if (diff > singleEpsilon)
{
throw new Exception($"Expected Result {powSingleExpectedResult,10:g9}; Actual Result {result,10:g9}");
}
}
}
}
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