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

//volatile byte db,n=5,va;        //prueba 1
// volatile byte db,n=3,va;        //prueba 2
 volatile byte db,n=1,va;        //prueba 3


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

  //------------- Proceso en alto nivel -------------------
  // while(n>1)
  // {
  //   if(n>3)
  //   {
  //     db=9;
  //   }
  //   else
  //   {
  //     db=6;
  //   }
  //   va=va+db;
  //   n=n-1;
  // } 
  //------------------------------------------------------
  while(n>1)
  asm("L10:");
  asm(
    "lds r18,n \n"
    "cpi r18,2 \n"
    "brlo L30"
    :::"r16"
  );
  {  // 
    asm( 
      "cpi r18,4 \n"
      "brlo L31 \n"  //if(n>3)
      "ldi r19,9 \n"
      "sts db,r19 \n"
      "rjmp L32 \n"
      "L31: \n" //else
      "ldi r19,6 \n"
      "sts db,r19 \n"
      "L32: \n"
      "lds r20,va \n"
      "lds r21,db \n"
      "add r20,r21 \n"  //r20 <-- va+db
      "sts va,r20"     //va <-- r20,  va + db
      :::"r17","r18","r19","r20","r21"
    );
    //n=n-1;
    asm(
      "lds r20,n \n"
      "dec r20 \n"
      "sts n,r20"     //n <-- n-1
      :::"r20"
    );
  } 
  asm("rjmp L10");
  asm("L30:");
  DUMP(va);
}
void loop() {

}