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

volatile int8_t x,y;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  Serial.println("Prueba de subrutinas");
  asm goto(
    "ldi r16,5 \n"
    "sts x,r16 \n"
    "call %l[subtract] \n"
    "sts y,r17 \n"
    "jmp %l[ende]"
    ::::subtract,ende
  );

  subtract:
  asm volatile(
    "dec r16 \n"
    "mov r17,r16 \n"
    "ret"
  );

  ende:
  DUMP(x);
  DUMP(y);

}

void loop() {
  // put your main code here, to run repeatedly:

}