cpuid

#include <stdio.h>

int main(void) {
    int c = 0, d = 0, a = 0, model = 0, family = 0;
    __asm__
    (
            "movl $1, %%eax; \n"
            "cpuid; \n"
            "movl %%ecx, %0; \n"
            "movl %%edx, %1; \n"
            "movl %%eax, %2; \n"
            : "=m"(c), "=m"(d), "=m"(a)
            :
            : "memory"
            );
    int tmpfam = (a & 0x00000F00) >> 8;
    if (tmpfam == 15) {
        family = tmpfam + ((a & 0x0FF00000) >> 20);
    } else {
        family = tmpfam;
    }
    int tmpmod = ((a & 0x000000F0) >> 4);
    if (tmpfam == 6 || tmpfam == 15) {
        model = ((a & 0x000F0000) >> 12) + tmpmod;
    } else {
        model = tmpmod;
    }
    printf("family=%d model=%d ecx=0x%x edx=0x%x", family, model, c, d);
    return 0;
}