MDXposMatrix.cs

// 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.Collections.Generic;
using BenchmarkDotNet.Attributes;
using MicroBenchmarks;

namespace Benchstone.MDBenchI
{
[BenchmarkCategory(Categories.Runtime, Categories.Benchstones, Categories.JIT, Categories.MDBenchI)]
public class MDXposMatrix
{
    public const int ArraySize = 100;
    
    int[,] matrixField = new int[ArraySize + 1, ArraySize + 1];

    static void Inner(int[,] x, int n) {
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= n; j++) {
                int t = x[i,j];
                x[i,j] = x[j,i];
                x[j,i] = t;
            }
        }
    }

    [Benchmark(Description = nameof(MDXposMatrix))]
    public bool Test() {
        int[,] matrix = matrixField;
        
        int n = ArraySize;
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= n; j++) {
                matrix[i,j] = 1;
            }
        }

        if (matrix[n,n] != 1) {
            return false;
        }

        Inner(matrix, n);

        if (matrix[n,n] != 1) {
            return false;
        }

        return true;
    }
}
}