11.asm

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;计算Xi+-Yi=Ci,设置标志位来决定+还是-
		.model	small
		.stack	100h
		.data
			len	dw	10d
			x	dw	1,2,3,4,5,6,7,8,9,9
			y	dw	0,1,2,3,4,5,4,3,2,0
			z	dw	10 DUP(?)
			logic_rule	dw	1111100000b
		.code
		
		.startup
start:
		mov ax,@data
		mov ds,ax
		
		mov cx,len
		xor bx,bx
		mov dx,logic_rule
next:		
		mov ax,x[bx]
		shr dx,1
		jc	suby
		add ax,y[bx]
		jmp	result
		
suby:		
		sub ax,y[bx]
result:
		mov z[bx],ax
		
		inc bx
		inc bx
		
		
print:
		push dx
		or	ax,30h
		mov dx,ax
		mov ah,2
		INT 21h
		pop	 dx
		
		loop next
		
		
		.exit
		end