15. brne = Branch if not equal (!=0) (ASM)

volatile byte v = 2;
volatile byte cnt = 5;

void setup()
{
  Serial.begin(9600);
  asm(
    "1: \n"
    "lsl %0 \n"
    "dec %1 \n" // reg %1 face "--"
    "brne 1b \n" // daca nu e egal cu 0 sari la 1 (b = backward)
    : "+r" (v): "r" (cnt)
    );
    Serial.println(v); // 2<<5 = 2 * (2*2*2*2*2) = 64
}

void loop(){}