opencl-csharp

Prime calculation example using extension method for array (ClooExtensions.cs). Published to native binary via CoreRT - see tasks.json.

C#:

    // Prepare data - 2,3,4,5,6,7,8,9,10,11,12,13,14,...
    int[] Primes = Enumerable.Range(2, 1000000).ToArray();

    Primes.OpenCLForEach(IsPrimeKernelFunctionCodeString);
    // Expected result - 2,3,0,5,0,7,0,0,0,11,0,13,0,...

Kernel code string contents:

kernel void GetIfPrime(global int* message)
{
    int index = get_global_id(0);
    int upperl=(int)sqrt((float)message[index]);
    for(int i=2;i<=upperl;i++)
    {
        if(message[index]%i==0)
        {
            message[index]=0;
            return;
        }
    }
}

Requirements:

• newest VSCode with C#/Omnisharp extension OR newest Visual Studio 2019
• .NET Core 3.1 SDK installed ( cmd: dotnet --info )
• Windows 10 SDK + Visual studio build tools for c++
• GPU driver with OpenCL support
• for linux/macos create Cloo.dll.config:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <dllmap os="linux" dll="opencl.dll" target="libOpenCL.so"/>
  <dllmap os="osx" dll="opencl.dll" target="/System/Library/Frameworks/OpenCL.framework/OpenCL" />
</configuration>

The project targets .NET Core, but code files should work with .NET 4.8 as well (after installing Cloo nuget package).