7-12.asm

一些汇编实验程序

;宏汇编

finsum macro x,y,sum
local ex   
   mov bl,2
   mov ax,x
   sub ax,y
   cmp ax,0
   jg y2
   mov ax,x
   mul bl
   add ax,y
   jmp ex
y2:
   mov ax,y
   mul bl
   add ax,x
ex:
  mov sum,ax
endm
   
finsum1 macro x,y,sum
local ex1
   mov bl,2
   if x gt y
   mov ax,y
   mul bl
   add ax,x
   else
   mov ax,x
   mul bl
   add ax,y
   ;jmp ex1
   endif

   
ex1:
  mov sum,ax
endm
   
SSEG SEGMENT PARA STACK 'stack'
	dw 100h dup(0) ;初始化堆栈大小为100
SSEG ENDS

DSEG SEGMENT
  x dw 10
  y dw 20
  sum dw ?	
;数据段：在此处添加程序所需的数据
DSEG ENDS

ESEG SEGMENT
	;附加段：在此处添加程序所需的数据
ESEG ENDS

CSEG SEGMENT
	assume  cs:CSEG, ds:DSEG, es:ESEG, ss:SSEG


	
MAIN PROC   	;主程序入口

	mov ax, dseg
	mov ds, ax
	mov es, ax

  finsum x,y,sum	
  finsum1 x,y,sum
a=7
 b=5

  finsum1 a,b,sum
	;此处添加主程序代码

	mov ax, 4c00h  ;程序结束，返回到操作系统系统
	int 21h
MAIN ENDP
	
CSEG ENDS

END MAIN