// Constant memory - faster than global memory for read-only data
// accessed by all threads
__constant__ float coefficients[4];

extern "C" __global__ void polynomial_kernel(
    float *out,
    const float *inp,
    int numel
) {
    int i = blockIdx.x * blockDim.x + threadIdx.x;
    if (i < numel) {
        float x = inp[i];
        // Compute polynomial: coefficients[0] + coefficients[1]*x + coefficients[2]*x^2 + coefficients[3]*x^3
        out[i] = coefficients[0] +
                 coefficients[1] * x +
                 coefficients[2] * x * x +
                 coefficients[3] * x * x * x;
    }
}