#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;
  asm volatile(
    "lds r16,sum \n" //r16 <-- (sum)
    "lds r17,n \n"// r17 <-- (n)
    "add r16,r17 \n"// r16 <-- (sum) + (n)
    "sts sum,r16"// sum <-- (sum) + (n)
  );
  //n=n-1;
  asm volatile(
    "lds r16,n \n"//r16 <-- (n)
    "subi r16,1 \n"// r16 <-- (n) - 1
    "sts n,r16"//n <-- (n) - 1
  );
  //} 
  //while (n>0);
  // if(n>0)
  // {
  //   goto body1;
  // } 
  // else
  // {
  //   goto enddow1:
  // }

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

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

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

}