lamino-filters/src/lamino_ft_conv.cl

__kernel void lamino_c( __global float * in, __global float * flt,  __global float * out)
{
    const int idx = get_global_id(0);
    const int idy = get_global_id(1);
    const int index = idy * get_global_size(0) + idx;
    const uchar m = idx % 2;

    float result = in[index] * flt[index - m];

    if (m == 0) // real part
    {
        /* out[index]= in[index] * flt[index] - in[index+1] * flt[index+1]; */
        result -= in[index + 1] * flt[index+1];
    }
    else // imaginary part
    {
        /* out[index]=  in[index] * flt[index - 1] + in[index-1] * flt[index]; */
        result += in[index - 1] * flt[index];
    }

    out[index] = result;
}