yamamaya

#define SWAP(a, b) if (arr[a] > arr[b]) { uint8_t tmp = arr[a]; arr[a] = arr[b]; arr[b] = tmp; }

// Sorting network for 9 elements (25 steps)
void SortingNetwork9(uint8_t *arr) {
    SWAP(0, 1);
    SWAP(3, 4);
    SWAP(6, 7);
    SWAP(1, 2);
    SWAP(4, 5);
    SWAP(7, 8);