add two arrays using simd in csharp

To add two arrays using SIMD (Single Instruction, Multiple Data) in C#, you can make use of the System.Numerics namespace which provides the Vector<T> class.

Here's how you can add two arrays using SIMD:


main.cs
using System.Numerics;

public static void AddArrays(float[] array1, float[] array2, float[] resultArray)
{
    int index = 0;
    int vectorSize = Vector<float>.Count;

    // Add the arrays using SIMD
    while (index <= array1.Length - vectorSize)
    {
        var a = new Vector<float>(array1, index);
        var b = new Vector<float>(array2, index);
        var result = a + b;
        result.CopyTo(resultArray, index);

        index += vectorSize;
    }

    // Add the remaining elements using normal addition
    while (index < array1.Length)
    {
        resultArray[index] = array1[index] + array2[index];
        index++;
    }
}
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The Vector<float>.Count property returns the number of float elements that can fit into a single SIMD vector. In this example, we create vectors that hold the elements of two arrays and add them together. We then copy the result into a third array. Finally, we add the remaining elements of the arrays using normal addition.

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