#include <array>
#include <benchmark/benchmark.h>
#include <numeric>
#include <string>

int suma1(int *begin, int *end)
{
    int total = 0;
    asm("0: cmp %0,%2     \n"
        "   je 1f         \n"
        "   add $4,%0     \n" // esto se
        "   add -4(%0),%1 \n" // ve raro
        "   jmp 0b        \n"
        "1:               \n"
        : "+r"(begin), "+r"(total)
        : "r"(end)
        : "cc");
    return total;
}

int suma2(int *begin, int *end)
{
    int total = 0;
    asm("0: cmp %0,%2     \n"
        "   je 1f         \n"
        "   add (%0),%1   \n" // ahora no,
        "   add $4,%0     \n" // verdad?
        "   jmp 0b        \n"
        "1:               \n"
        : "+r"(begin), "+r"(total)
        : "r"(end)
        : "cc");
    return total;
}

int suma3(int *begin, int *end)
{
    return std::accumulate(begin, end, 0);
}

template<auto f> static void test(benchmark::State &state)
{
    const std::size_t N = 1'000'000;
    std::array<int, N> array;
    int resultado = 0;

    std::ranges::iota(array, 0);

    for (auto _ : state)
        resultado = f(array.begin(), array.end());

    state.SetLabel(std::to_string(resultado));
}

BENCHMARK(test<suma1>)->Unit(benchmark::kMicrosecond);
BENCHMARK(test<suma2>)->Unit(benchmark::kMicrosecond);
BENCHMARK(test<suma3>)->Unit(benchmark::kMicrosecond);

BENCHMARK_MAIN();