Intel汇编语言程序设计课后习题,6.5.5

  
    

   
     把C语言翻译成汇编语言
  
    
  
    

   
     

  
    

  
    

   
     if
   
     (dx
   
     <=
   
     cx)
 x
   
     =
   
     1
   
     

   
     else
   
     
 x
   
     =
   
     2
  
    

  
    

   
     main PROC
 
   
     mov
   
      edx,
   
     4
   
     
 
   
     mov
   
      ecx,
   
     5
   
     
 
   
     cmp
   
      edx,ecx
 
   
     jle
   
      L1
 
   
     mov
   
      x,
   
     2
   
     
 
   
     jmp
   
      next

   
     L1:
   
     
 
   
     mov
   
      x,
   
     1
   
     

   
     next:
   
     
 
   
     mov
   
      eax,x
 
   
     call
   
      WriteDec
 
   
     ret
   
     
main endp
  
    

  
    

   
     if
   
     (bx
   
     >
   
     cx)
 x
   
     =
   
     1
  
    

  
    

   
      
   
     mov
   
      eax,
   
     4
   
     
 
   
     mov
   
      ebx,
   
     5
   
     
 
   
     cmp
   
      eax,ebx
 
   
     jg
   
      next
 
   
     mov
   
      x,
   
     1
   
     
 
   
     mov
   
      eax,x
 
   
     call
   
      WriteDec

   
     next:
   
     
 
   
     ret
  
    

  
    

   
     if
   
     (Val1
   
     >
   
     cx AND cx
   
     >
   
     dx)
 X
   
     =
   
     1
   
     

   
     else
   
     
 X
   
     =
   
     2
  
    

  
    

   
     .data
X DWORD 
   
     ?
   
     
Val1 DWORD 
   
     9
   
     
.code

main PROC
 mov ecx,
   
     8
   
     
 mov edx,
   
     7
   
     
 cmp Val1,ecx
 jle next
 cmp ecx,edx
 jle next
 mov X,
   
     2
   
     
 jmp L2
next:
 mov X,
   
     1
   
     
L2:
 mov eax,X
 call WriteDec
 ret
main endp
  
    

  
    

   
     if
   
     (bx
   
     >
   
     cx OR bx
   
     >
   
     VAL1)
 X
   
     =
   
     1
   
     

   
     else
  
    
  
    

   
     　　X=2

  
    

  
    

   
     .data
X DWORD ?
Val1 DWORD 
   
     9
   
     
.code

main PROC
 
   
     mov
   
      ebx,
   
     5
   
     
 
   
     mov
   
      ecx,
   
     6
   
     
 
   
     cmp
   
      ebx,ecx
 
   
     jg
   
      L1
 
   
     cmp
   
      ebx,Val1
 
   
     jg
   
      L1
 
   
     mov
   
      X,
   
     2
   
     
 
   
     jmp
   
      next

   
     L1:
   
     
 
   
     mov
   
      X,
   
     1
   
     

   
     next:
   
     
 
   
     mov
   
      eax,X
 
   
     call
   
      WriteDec
 
   
     ret
   
     
main endp
  
    

  
    

   
     if
   
     (bx
   
     >
   
     cx AND bx
   
     >
   
     dx) OR (dx
   
     >
   
     ax)
 X
   
     =
   
     1
   
     

   
     else
   
     
 X
   
     =
   
     2
  
    

  
    

   
     main PROC
 
   
     mov
   
      ebx,
   
     5
   
     
 
   
     mov
   
      ecx,
   
     6
   
     
 
   
     mov
   
      edx,
   
     7
   
     
 
   
     mov
   
      eax,
   
     8
   
     
 
   
     cmp
   
      edx,eax
 
   
     jg
   
      L1
 
 
   
     cmp
   
      ebx,ecx
 
   
     jle
   
      L2
 
   
     cmp
   
      ebx,edx
 
   
     jle
   
      L2

   
     L1:
   
     
 
   
     mov
   
      X,
   
     1
   
     
 
   
     jmp
   
      next

   
     L2:
   
     
 
   
     mov
   
      X,
   
     2
   
     
 
   
     jmp
   
      next

   
     next:
   
     
 
   
     mov
   
      eax,X
 
   
     call
   
      WriteDec
 
   
     ret
   
     
main endp