cpuid 是一个 x86 和 x86-64 指令集中的指令，用于获取 CPU 的信息
#include<iostream>#include<string>#include <bitset>#include <cstdint>void cpuid(uint32_t eax, uint32_t ecx, uint32_t* abcd) { asm volatile("cpuid" : "=a"(abcd[0]), "=b"(abcd[1]), "=c"(abcd[2]), "=d"(abcd[3]) : "a"(eax), "c"(ecx));}std::string get_vendor_name() { uint32_t abcd[4]; cpuid(0, 0, abcd); return std::string(reinterpret_cast<char*>(&abcd[1]), 4) + std::string(reinterpret_cast<char*>(&abcd[3]), 4) + std::string(reinterpret_cast<char*>(&abcd[2]), 4);}int main() { std::cout << "CPU Vendor: "<< get_vendor_name()<< std::endl; return 0;}#include<iostream>#include <bitset>#include <cstdint>void cpuid(uint32_t eax, uint32_t ecx, uint32_t* abcd) { asm volatile("cpuid" : "=a"(abcd[0]), "=b"(abcd[1]), "=c"(abcd[2]), "=d"(abcd[3]) : "a"(eax), "c"(ecx));}bool has_sse41() { uint32_t abcd[4]; cpuid(1, 0, abcd); return (abcd[2] & (1 << 19)) != 0;}int main() { if (has_sse41()) { std::cout << "CPU supports SSE4.1"<< std::endl; } else { std::cout << "CPU does not support SSE4.1"<< std::endl; } return 0;}#include<iostream>#include <bitset>#include <cstdint>void cpuid(uint32_t eax, uint32_t ecx, uint32_t* abcd) { asm volatile("cpuid" : "=a"(abcd[0]), "=b"(abcd[1]), "=c"(abcd[2]), "=d"(abcd[3]) : "a"(eax), "c"(ecx));}void get_cpu_info() { uint32_t abcd[4]; cpuid(1, 0, abcd); std::bitset<32> edx(abcd[3]); std::bitset<32> ecx(abcd[2]); std::cout << "CPU features: "<< std::endl; std::cout << "SSE: " << edx[25]<< std::endl; std::cout << "SSE2: " << edx[26]<< std::endl; std::cout << "SSE3: " << ecx[0]<< std::endl; std::cout << "SSSE3: " << ecx[9]<< std::endl; std::cout << "SSE4.1: " << ecx[19]<< std::endl; std::cout << "SSE4.2: " << ecx[20]<< std::endl;}int main() { get_cpu_info(); return 0;}这些示例展示了如何使用 cpuid 指令在 C++ 中获取 CPU 的供应商、检测 CPU 支持的特性以及获取 CPU 的基本信息。请注意，这些示例仅适用于 x86 和 x86-64 架构的处理器。在其他架构上，需要使用相应的指令或库函数来获取类似的信息。
