#pragma GCC optimize "-Og"
#include "ArduinoTrace.h"

volatile byte a=8, b=5;


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

  asm goto
  ( 
    //"lds r24,a \n"
    //"cpi r24,8 \n" //a-8
    "cpi %0,8 \n"
    // "in r24,0x3F \n"   //r24 <--- sreg
    "in %0,%1 \n"  //en %0 está Sreg
    // "sbrc r24,0 \n"
    "sbrc %0,0 \n"
    "rjmp %l[L20] "
    :
    :"d"(a),"I"(_SFR_IO_ADDR(SREG))
    :
    :L20
  );




  L10:
  // a=a-b;
  asm volatile
  (
  //"lds r24,a \n"
  //"lds r20,b \n"
  // "sub r24,r20 \n"
  "sub %0,%1"
  //"sts a,r24"
  :"+r"(a)
  :"r"(b)
  :
  );


  // goto L30;
  asm goto
  (
  "rjmp %l[L30] \n"
  ::::L30
  );

  
  L20:
  // a=a+b;
  asm volatile
  (
  // "lds r24,a \n"
  // "lds r20,b \n"
  "add %0,%1 \n"
  // "sts a,r24"
  :"+r"(a)
  :"r"(b)
  :

  );

  L30:
//-----------------------------------------
  DUMP(a);
}

void loop() {
  
}