/* --------------------------------------------------
   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;

   a = b + c;     //  a = 5 + 256 (overflow !!!)
   -------------------------------------------------- */
	.text
main:

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

	// Move c into r2
        movw    r0, #:lower16:c 	// Moves the address of memory
        movt    r0, #:upper16:c 	//   variable c into register r0
	ldr	r2,[r0]			// Move int value from var into r2

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

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


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