#include <stdio.h>
#include <stdint.h>
#include <cpuid.h>
#include <string.h>
 
int main(int argc, char **argv)
{
    // a função opcode CPUID:
    int op;  
 
    // registradores:
    int eax; 
    int ebx; 
    int ecx; 
    int edx;
 
    // parâmetro zero para CPUID indica que você quer o fabricante.
    op = 0; 
 
    __asm__ ("cpuid" : "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx)
                     : "a" (op));
 
    // Receberá os valores de EBX, ECX e EDX para sistemas 32bits:
    char vendor[sizeof(int) * 3 + 1]; 
    strncpy(vendor, (const char*) &ebx, sizeof(int));
    strncpy(&vendor[8], (const char*) &ecx, sizeof(int));
    strncpy(&vendor[4], (const char*) &edx, sizeof(int));
    vendor[12] = '\0'; // terminador nulo
 
    printf("CPU: %s", vendor);
 
    return 0;
}
 

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