/*Write an ARM assembly function that performs 4 times logical shift left operation 
on one parameter and returns the result to a calling C program.*/

void setup() {
  // put your setup code here, to run once:
  Serial1.begin(115200);
}

extern "C" {
  int lshift(int a);
}

int main() {
  int x;
  printf("enter x: ");
  scanf("%i", &x);
  printf("%i\n", x);

  printf("%i\n", lshift(x));
  return 0;
}