Column-wise Kernels

gistfile1.cl

__kernel void MyAdd_col(const double __global *A,
                        const double __global *B,
                        double __global *C,
                        unsigned long int N)
{
    unsigned long int i = get_global_id(0);

    for(unsigned long int j = 0; j < N; j++) {
        if (j % 2 == 0)
            get(C, N, i, j) = get(A, N, i, j) + get(A, N, i, j);
        else
            get(C, N, i, j) = get(A, N, i, j) - get(A, N, i, j);
    }
}


__kernel void MyAdd_2D_col(const double __global *A,
                           const double __global *B,
                           double __global *C,
                           unsigned long int N)
{
    unsigned long int i = get_global_id(0);
    unsigned long int j = get_global_id(1);

    if (j % 2 == 0)
        get(C, N, i, j) = get(A, N, i, j) + get(A, N, i, j);
    else
        get(C, N, i, j) = get(A, N, i, j) - get(A, N, i, j);
}


__kernel void MyAdd_2D_unweave_col(const double __global *A,
                                   const double __global *B,
                                   double __global *C,
                                   unsigned long int N)
{
    unsigned long int i = get_global_id(0);
    unsigned long int j = get_global_id(1);

    if(j < N / 2) {
        unsigned long int j = 2 * j;
        get(C, N, i, j) = get(A, N, i, j) + get(A, N, i, j);
    }
    else {
        unsigned long int j = 2 * (j - N / 2) + 1;
        get(C, N, i, j) = get(A, N, i, j) - get(A, N, i, j);
    }
}