#pragma once
#include <cstdint>
#include <klibc/string.hpp>

namespace assembly {
    inline static std::uint64_t rdmsr(std::uint32_t msr) {
        std::uint32_t lo, hi;
        __asm__ volatile ("rdmsr" : "=a"(lo), "=d"(hi) : "c"(msr));
        return ((std::uint64_t)hi << 32) | lo; 
    }

    inline static void wrmsr(std::uint32_t msr, std::uint64_t value) {
        std::uint32_t lo = (uint32_t)(value & 0xFFFFFFFF); 
        std::uint32_t hi = (uint32_t)(value >> 32);
        __asm__ volatile ("wrmsr" : : "c"(msr), "a"(lo), "d"(hi));
    }

    inline static void cpuid(int code, int code2, std::uint32_t *a, std::uint32_t *b, std::uint32_t *c , std::uint32_t *d) {
        __asm__ volatile("cpuid":"=a"(*a),"=b"(*b),"=c"(*c),"=d"(*d):"a"(code),"c"(code2));
    }

    inline static int cpuid_string(int code, std::uint32_t where[4]) {
        __asm__ volatile("cpuid":"=a"(*where),"=b"(*(where+1)),"=c"(*(where+2)),"=d"(*(where+3)):"a"(code));
        return (int)where[0];
    }

    inline static std::uint64_t rdtsc() {
        unsigned int hi, lo;
        __asm__ volatile ("rdtsc" : "=a"(lo), "=d"(hi));
        return ((uint64_t)hi << 32) | lo;
    }

    inline static bool is_qemu() {
        uint32_t a,b,c,d;

        cpuid(0x40000000, 0, &a, &b, &c, &d);

        char hypervisorSignature[13];
        ((uint32_t *)hypervisorSignature)[0] = b;
        ((uint32_t *)hypervisorSignature)[1] = c;
        ((uint32_t *)hypervisorSignature)[2] = d;
        hypervisorSignature[12] = '\0';  

        if (klibc::memcmp(hypervisorSignature, (void*)"TCGTCGTCGTCG", 12) == 0 || klibc::memcmp(hypervisorSignature, (void*)"KVMKVMKVM\0\0\0", 12) == 0) {
            return true;  
        }

        return false; 
    }

};