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

volatile int8_t n=3,sum,i;

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

  //------------- Proceso en alto nivel -------------------

  //i=1;
  //init1:
  //if(i<=n) if(n>=i)  for(int i = 0; n>=i; i++)
  //{
  //  goto body1;
  //}
  //else
  //{
  //  goto end1;
  //}
  //
  //body1:
  //{
  //  sum=sum+i;
  //  i++;
  //  goto init1;
  //}
  //end1:
  //--------------------------------------------------------
  init1:{
    //if(n>=i){goto body1}
    //else{goto endw1}
    //endw1:
    asm goto(
      "lds r16,n \n" //r16 <--- (n)
      "lds r17,i \n" //r17 <--- (i)
      "cp r16,r17 \n" // r16 - r17
      "brge %l[body1] \n" //if n>=i <--> i<=n goto body1
      "jmp %l[end1]" // else goto end1
      :::: body1,end1
    );
  }

  body1:{
    //sum = sum + i   
    asm volatile(
      "lds r16,sum \n" // r16 <--- (sum)
      "add r16,r17 \n" // r16 <--- (sum) + (i)
      "sts sum,r16 \n" // sum <--- (sum) + (i)
    //i++
      "ldi r16,1 \n"  // r16 <--- 1
      "add r16,r17 \n"// r16 <--- 1 + (i)
      "sts i,r16 \n" // i <--- 1 + (i)
    );

    goto init1;
  }
  end1:
  DUMP(sum);
}
void loop() {

}