mov-vs-push2.cpp

#include <benchmark/benchmark.h>

static void pushpop(benchmark::State &state)
{
    for (auto _ : state)
    {
        __asm__ __volatile__("push %%rax; pop %%rbx" ::: "rbx");
        __asm__ __volatile__("push %%rbx; pop %%rax" ::: "rax");
        __asm__ __volatile__("push %%rax; pop %%rbx" ::: "rbx");
        __asm__ __volatile__("push %%rbx; pop %%rax" ::: "rax");
        __asm__ __volatile__("push %%rax; pop %%rbx" ::: "rbx");
        __asm__ __volatile__("push %%rbx; pop %%rax" ::: "rax");
        __asm__ __volatile__("push %%rax; pop %%rbx" ::: "rbx");
        __asm__ __volatile__("push %%rbx; pop %%rax" ::: "rax");
        __asm__ __volatile__("push %%rax; pop %%rbx" ::: "rbx");
        __asm__ __volatile__("push %%rbx; pop %%rax" ::: "rax");
        __asm__ __volatile__("push %%rax; pop %%rbx" ::: "rbx");
    }
}

BENCHMARK(pushpop);

static void mov(benchmark::State &state)
{
    for (auto _ : state)
    {
        __asm__ __volatile__("mov %%rax, %%rbx" ::: "rbx");
        __asm__ __volatile__("mov %%rbx, %%rax" ::: "rax");
        __asm__ __volatile__("mov %%rax, %%rbx" ::: "rbx");
        __asm__ __volatile__("mov %%rbx, %%rax" ::: "rax");
        __asm__ __volatile__("mov %%rax, %%rbx" ::: "rbx");
        __asm__ __volatile__("mov %%rbx, %%rax" ::: "rax");
        __asm__ __volatile__("mov %%rax, %%rbx" ::: "rbx");
        __asm__ __volatile__("mov %%rbx, %%rax" ::: "rax");
        __asm__ __volatile__("mov %%rax, %%rbx" ::: "rbx");
        __asm__ __volatile__("mov %%rbx, %%rax" ::: "rax");
        __asm__ __volatile__("mov %%rax, %%rbx" ::: "rbx");
    }
}

BENCHMARK(mov);

BENCHMARK_MAIN();