#pragma GCC optimize ("Og")
#include "ArduinoTrace.h"

volatile int8_t n=3,sum;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  Serial.println("INICIO");

  //------------- Proceso en alto nivel -------------------
  //do
  body1:
  //{
  //  sum=sum+n;
  //  n=n-1;
  //}
  asm volatile
  (
    "lds r16, sum \n"
    "lds r17, n \n"
    "add r16, r17 \n"
    "sts sum, r16 \n"
    "dec r17 \n"
    "sts n, r17"
  );

  //while (n>0);
  // if(n>0)
  // {
  //   goto initdow;
  // } 

  asm goto
  (
    "lds r16,n \n"
    "cpi r16,1 \n"
    "brlt %l[enddow1] \n"    //si n<1 <--> n<=0 goto enddow1
    "jmp %l[body1] \n"
    ::::body1,enddow1
  );
  enddow1:

  //--------------------------------------------------------

  DUMP(n);
  DUMP(sum);
}
void loop() {

}