puts modelname of cpu with cpuid

modelname.cc

//------------------------------------------------------------------------
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <stdarg.h>
//------------------------------------------------------------------------
void
cpuid(uint32_t v, uint32_t &a, uint32_t &b, uint32_t &c, uint32_t &d){
  uint32_t eax, ebx, ecx, edx;
  asm("nop" :: "a" (v));
  asm("cpuid");
  asm("movl %%eax, %0" : "=r" (eax));
  asm("movl %%ebx, %0" : "=r" (ebx));
  asm("movl %%ecx, %0" : "=r" (ecx));
  asm("movl %%edx, %0" : "=r" (edx));
  a = eax;
  b = ebx;
  c = ecx;
  d = edx;
}
//------------------------------------------------------------------------
int
put(int num, ...){
  va_list args;
  va_start(args,num);
  char buf[256];
  buf[num*4] = 0;
  for(int i=0;i<num;i++){
    uint32_t v = va_arg(args,uint32_t);
    memcpy(buf+4*i,(char*)(&v),4);
  }
  printf("%s",buf);
  va_end(args);
}
//------------------------------------------------------------------------
int
main(void){
  uint32_t eax, ebx, ecx, edx;
  cpuid(0,eax,ebx,ecx,edx);
  put(3,ebx,edx,ecx);
  printf("\n");
  cpuid(0x80000002,eax,ebx,ecx,edx);
  put(4,eax,ebx,ecx,edx);
  cpuid(0x80000003,eax,ebx,ecx,edx);
  put(4,eax,ebx,ecx,edx);
  cpuid(0x80000004,eax,ebx,ecx,edx);
  put(4,eax,ebx,ecx,edx);
  printf("\n");
}
//------------------------------------------------------------------------