/* Write ARM assembly functions for:
 a) Function to take two signed parameters, and performs an ADD operation.
 b) Function to Read the flag bits from the PSR.
Return both outputs to the main function.
Function prototype: lab5_act_2_1_add(int, int)
                    lab5_act_2_1_flag(int, int) */
#include <stdio.h>
#include <stdlib.h>

extern "C"{
  signed int lab5_act_2_1_add(int x,int y);
  unsigned int lab5_act_2_1_flag(void);
}

void setup() {
  // put your setup code here, to run once:
  pinMode(LED_BUILTIN, OUTPUT);
}

void loop() {
  signed int asm_ret_val;
  signed int flag_bits;
  int x,y;

  printf("Enter x: ");
  scanf("%d",&x);
  printf("%d\n",x);

  printf("Enter y: ");
  scanf("%d",&y);
  printf("%d\n",y);

  asm_ret_val = lab5_act_2_1_add(x,y);
  flag_bits = lab5_act_2_1_flag();

  printf("\n");
  printf("%d + %d: %d\n",x,y,asm_ret_val);
  printf("The Flag Bits are: %X\n",flag_bits);
  printf("\n");

}