/************** log *****************/
int main() {
 int n, k, log ;

 printf("Enter a positive integer: ") ;
 scanf("%d",&n);
 printf("Enter an integer > 1: ") ;
 scanf("%d",&k);

 asm( 
      "movl $0, %0        # log <- 0 \n\t"
      ".MyL1:             # label \n\t"
      "cmpl %%ecx, %%eax  # if n < k \n\t"
      "jl .MyL2           # goto .MyL2 \n\t"
      "movl $0, %%edx     # edx <- 0 \n\t"
      "idivl %%ecx        # edx:eax/ecx \n\t"
      "incl %0            # %0++ \n\t"
      "jmp .MyL1          # goto .MyL1 \n\t"
      ".MyL2:             # label \n\t"
     :"=b"(log)
     :"a"(n), "c"(k)
     :"%edx"
    );

 printf("\nlog(%d,%d) = %d\n",n,k,log);
}