; ***********************************************************************
; *									*
; *	 Add Two Numbers (Version 1 of the Assembly Language Code)	*
; *									*
; ***********************************************************************

; Authors:  Saeid Nooshabadi and John Zaitseff
; Date:	    20th June, 2003
; Version:  1.4

; This simple program adds two integers in registers R1 and R2 together.
; It is meant to show how to translate a simple C program into into ARM
; assembly language.  It is, essentially, the equivalent of add-c.c.

; -----------------------------------------------------------------------
; Assembly-language preamble for the main module

	.text				; Executable code follows

_start: .global _start			; "_start" is required by the linker
	.global main			; "main" is our main program

	b	main			; Start running the main program


; -----------------------------------------------------------------------
; Start of the main program

; This function performs the main work of the program, adding two integers
; in registers R1 and R2 and return in the value in the third integer R0.

main:					; Entry to the function "main"

	mov	r1, #10			; 0x0A in hexadecimal
	mov	r2, #11			; 0x0B in hexadecimal
	add	r0, r1, r2		; Add the two numbers together

	mov	pc, lr			; Stop the program and return to the
					; Operating System (OS).

	.end