public IVector Column(int index)
{
Debug.Assert(IsValid);
//var ret = _cuda.Allocate(_rows);
//ret.DeviceVariable.CopyToDevice(_data.DeviceVariable, index * _rows * sizeof(float), 0, _rows * sizeof(float));
//return new GpuVector(_cuda, ret);
var columnSize = _rows * sizeof(float);
var offset = index * columnSize;
var ptr = new PtrToMemory(_cuda.Context, new CUdeviceptr(_data.DeviceVariable.DevicePointer.Pointer + offset), columnSize);
return(new GpuVector(_cuda, ptr));
}
public IReadOnlyList <IVector> Split(int blockCount)
{
Debug.Assert(IsValid);
var blockSize = Count / blockCount;
var ptr = _data.DevicePointer.Pointer;
var size = blockSize * sizeof(float);
return(Enumerable.Range(0, blockCount).Select(i => {
var offset = (size * i);
var ptr2 = new PtrToMemory(_cuda.Context, new CUdeviceptr(ptr + offset), size);
return new GpuVector(_cuda, ptr2);
}).ToList());
}
