__cpuidex读取CPU序列号

近日研究__cpuidex的用法，查询到的相关示例都比较复杂，所以本人简化了一部分内容，重新写了一个简单的例子，仅获取CPU序列号，最终结果与通过WMIC命令查询的结果保持一致。

代码示例

#include <iostream>#include <array>#include <intrin.h>#include <vector>#include <cstring>using std::cout;int main(){    std::array<int, 4> cpui;    //#include <array>    // Calling __cpuid with 0x0 as the function_id argument      // gets the number of the highest valid function ID.  什么是function ID？    __cpuid(cpui.data(), 0x0);    //cpui[0] = "funcition_id的最大值"    int nIds_ = cpui[0];    std::vector<std::array<int, 4>> data_;  //保存遍历到的所有cpui的值        for (int i=0;i<=nIds_;++i)    {        __cpuidex(cpui.data(), i, 0);        data_.push_back(cpui);    }    //reinterpret_cast<int*>(vendor) //*reinterpret_cast<int*>(vendor)    //索引0 0+4 0+8的值构成了CPU芯片的名称    char vendor[0x20] = { 0 };    *reinterpret_cast<int*>(vendor) = data_[0][1];    *reinterpret_cast<int*>(vendor + 4) = data_[0][3];    *reinterpret_cast<int*>(vendor + 8) = data_[0][2];  // vendor="GenuineIntel"        std::string vendor_ = vendor;    bool isIntel_ = false;    bool isAMD = false;    if ("GenuineIntel" == vendor_)    {        isIntel_ = true;    //厂商为INTEL    }    else if ("AuthenticAMD"==vendor_)    {        isAMD = true;       //厂商为AMD    }    char vendor_serialnumber[0x14] = { 0 };    sprintf_s(vendor_serialnumber, sizeof(vendor_serialnumber), "%08X%08X", data_[1][3], data_[1][0]);    //用“wmic cpu get processorid”获取的结果进行比对，结果应该是一致的。    //vendor_serialnumber = "BFEBFBFF000406E3";        std::cout << "ProcessorId is [ " << vendor_serialnumber << " ]" << std::endl;    return 0;}

Microsoft Specific
Generates the cpuid instruction that is available on x86 and x64. This instruction queries the processor for information about supported features and the CPU type.

Syntax
void __cpuid(
int cpuInfo[4],
int function_id
);

void __cpuidex(
int cpuInfo[4],
int function_id,
int subfunction_id
);

Parameters
[out] cpuInfo
An array of four integers that contains the information returned in EAX, EBX, ECX, and EDX about supported features of the CPU.

[in] function_id
A code that specifies the information to retrieve, passed in EAX.

[in] subfunction_id
An additional code that specifies information to retrieve, passed in ECX.

Requirements
Header file <tintrin.h>

参考文献

【MSDN】__cpuid, __cpuidex

其他

2017-3-14 10:58:23，更新函数说明。尖括号需要转义【&lt+分号】【&gt+分号】。
2017-2-14 14:39:04，上海宝山。