/* --------------------------------------------------
   Define required labels for EGTAPI
   -------------------------------------------------- */
        .global main, Stop, CodeEnd
	.global DataStart, DataEnd

	.global a, b, c

/* --------------------------------------------------
   byte   a = 4;
   short  b = 5;
   int    c = 256;

   c = a + b;     
   -------------------------------------------------- */
	.text
main:

	// Move a into r1
        movw    r0, #:lower16:a 	// Moves the address of memory
        movt    r0, #:upper16:a 	// variable a into register r0
	ldrsb	r1,[r0]			// Move byte value from var into r1
					// ldrsb also sign-extend to int !!

	// Move b into r2
        movw    r0, #:lower16:b 	// Moves the address of memory
        movt    r0, #:upper16:b 	// variable b into register r0
	ldrsh	r2,[r0]			// Move short value from var into r2
					// ldrsb also sign-extend to int !!

	// Add them up
	add	r2, r1, r2		// r2 = a + b

	// Move sum in r2 to c
        movw    r0, #:lower16:c 	// Moves the address of memory
        movt    r0, #:upper16:c 	// variable c into register r0
	str	r2,[r0]			// Move sum in r2 to var c


Stop:
CodeEnd:
    	nop

/* --------------------------------------------------
   Begin of the permanent program variables
   -------------------------------------------------- */
	.data
DataStart:

a:    .byte   4        // a contains the value 4 in 8  bits
      .align 1
b:    .2byte  5        // b contains the value 5 in 16 bits
      .align 2
c:    .4byte  256      // c contains the value 256 in 32 bits

DataEnd:

	.end