pushpopvssubadd.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 pushpop2(benchmark::State &state)
{
    for (auto _ : state)
    {
        __asm__ __volatile__("push %%rax; pop %%rbx" ::: "rbx");
        __asm__ __volatile__("push %%rax; pop %%rbx" ::: "rbx");
        __asm__ __volatile__("push %%rax; pop %%rbx" ::: "rbx");
        __asm__ __volatile__("push %%rax; pop %%rbx" ::: "rbx");
        __asm__ __volatile__("push %%rax; pop %%rbx" ::: "rbx");
        __asm__ __volatile__("push %%rax; pop %%rbx" ::: "rbx");
        __asm__ __volatile__("push %%rax; pop %%rbx" ::: "rbx");
        __asm__ __volatile__("push %%rax; pop %%rbx" ::: "rbx");
        __asm__ __volatile__("push %%rax; pop %%rbx" ::: "rbx");
        __asm__ __volatile__("push %%rax; pop %%rbx" ::: "rbx");
        __asm__ __volatile__("push %%rax; pop %%rbx" ::: "rbx");
    }
}

BENCHMARK(pushpop2);

static void subadd(benchmark::State &state)
{
    for (auto _ : state)
    {
        __asm__ __volatile__("sub $8, %rsp; add $8, %rsp");
        __asm__ __volatile__("sub $8, %rsp; add $8, %rsp");
        __asm__ __volatile__("sub $8, %rsp; add $8, %rsp");
        __asm__ __volatile__("sub $8, %rsp; add $8, %rsp");
        __asm__ __volatile__("sub $8, %rsp; add $8, %rsp");
        __asm__ __volatile__("sub $8, %rsp; add $8, %rsp");
        __asm__ __volatile__("sub $8, %rsp; add $8, %rsp");
        __asm__ __volatile__("sub $8, %rsp; add $8, %rsp");
        __asm__ __volatile__("sub $8, %rsp; add $8, %rsp");
        __asm__ __volatile__("sub $8, %rsp; add $8, %rsp");
        __asm__ __volatile__("sub $8, %rsp; add $8, %rsp");
    }
}

BENCHMARK(subadd);

BENCHMARK_MAIN();