__kernel void tanh_grad_fp(const int M, const int N, __global const float *A, __global float *C) {
    // Get the index of the current element to be processed
    const int globalRow = get_global_id(0); // Row ID of C (0..M)
    const int globalCol = get_global_id(1); // Col ID of C (0..N)
    C[globalRow * N + globalCol] = 1 - tanh(A[globalRow * N + globalCol]) * tanh(A[globalRow * N + globalCol]);
}