Hastlayer-SDK

using Hast.Layer;
using Hast.Transformer.SimpleMemory;

namespace Hast.Samples.SampleAssembly;

/// <summary>
/// A sample that tests the memory access on an FPGA. It'll start incrementing all SimpleMemory cells' values starting
/// at the given start index until the given length.
///
/// This is a bit more complex version of <see cref="Loopback"/>.
/// </summary>
public class MemoryTest
{
    private const int RunStartIndexInt32Index = 0;
    private const int RunLengthInt32Index = 1;

    public virtual void Run(SimpleMemory memory)
    {
        var startIndex = memory.ReadInt32(RunStartIndexInt32Index);
        var length = memory.ReadInt32(RunLengthInt32Index);
        var endIndex = startIndex + length;

        for (int i = startIndex; i < endIndex; i++)
        {
            // Adding 1 to the input so it's visible whether this actually has run, not just the untouched data was sent
            // back.
            memory.WriteInt32(i, memory.ReadInt32(i) + 1);
        }
    }

    public int Run(int startIndex, int length, IHastlayer hastlayer = null, IHardwareGenerationConfiguration configuration = null)
    {
        var cellCount = startIndex + length < 2 ? 2 : startIndex + length;
        var memory = hastlayer is null
            ? SimpleMemory.CreateSoftwareMemory(cellCount)
            : hastlayer.CreateMemory(configuration, cellCount);
        memory.WriteInt32(RunStartIndexInt32Index, startIndex);
        memory.WriteInt32(RunLengthInt32Index, length);
        Run(memory);
        return memory.ReadInt32(RunStartIndexInt32Index);
    }
}