/************* GCD ******************/
int main() {
 int n, m, gcd ;

 printf("Enter two non-negative integers: ") ;
 scanf("%d%d",&n,&m);

 asm( 
     ".MyL1:             # Label \n\t"
     "cmpl $0, %%ecx     # if m == 0 \n\t"
     "je .MyL3           # goto .MyL3 \n\t"
     "movl $0, %%edx     # edx <- 0 \n\t"
     "idivl %%ecx        # edx:eax/ecx \n\t"
     "movl %%ecx, %%eax  # eax <- dividend \n\t"
     "movl %%edx, %%ecx  # ecx <- divisor \n\t"
     "jmp .MyL1          # goto .MyL1 \n\t"
     ".MyL3:             # Label \n\t"
     "movl %%eax, %0     # gcd <- eax \n\t"
     :"=r"(gcd)
     :"a"(n), "c"(m)
     :"%edx"
    );

 printf("\ngcd(%d,%d) = %d\n",n,m,gcd);
}