s1				dcb		'h','e','l','l','o',0
s2				dcb		'h','e','l','l',0
				
				;		r0 = return value, 0 --> stringhe uguali
				;		r1 = s1
				;		r2 = s2
				;		r3 = *s1
				;		r4 = *s2
				
				mov		r1,#s1
				mov		r2,#s2
				
strcmp_loop
				ldrb		r3,[r1]
				ldrb		r4,[r2]
				
				sub		r0, r3, r4
				cmp		r3,r4
				bne		end_strcmp_loop
				
				cmp		r3,#0
				bne		strcmp_continue
				cmp		r4,#0
				bne		strcmp_continue
				;		r3 == 0&& r4 == 0
				mov		r0,#0
				b		end_strcmp_loop
				
strcmp_continue
				add		r1,r1,#1
				add		r2,r2,#1
				b		strcmp_loop
				
end_strcmp_loop
				end