用于计算因子错误的ARM7汇编代码：A1163E：未知的操作码循环，期望操作码或宏 [英] ARM7 Assembly code that computes the Factorial error: A1163E: Unknown opcode loop , expecting opcode or Macro

问题描述

 AREA factorial，CODE 
 ENTRY 
;程序找到阶乘
 MOV R0，＃1; int c = 1 
 MOV R1，＃6 ; int n = 1 
 MOV R3，＃1; int fact = 6 
 BL循环
 B out 
 
循环;错误是什么
 MUL R4，R3，R0 
 ADD R0，R0，＃1 
 CMP R0，R1 
 BLE循环
 MOV PC，LR 
 
 END 
 

解决方案

  loop ;什么  错误 

试试1）（注意冒号）

循环：;错误是什么

2）RTFM !!!!

 区域  factorial ， CODE  
  ENTRY  
 ; program   to   find   factorial  
  MOV   R0 ，＃< span class =code-leadattribute> 1  ; int   c   = 1  
  MOV   R1 ，＃ 6  ; int  n = 1 
  MOV   R3 ，＃ 1  < span class =code-leadattribute>; int  fact = 6 
  BL   loop  
  B   STOP  
 
  loop  
  MUL   R4 ， R3 ， R0  
  MOV   R3 ， R4  
  ADD   R0 ， R0 ，＃ 1  
  CMP   R0 ， R1  
  BLE   loop  
  MOV   PC ， LR  
  STOP   B   STOP  ; R4   IS   FINAL   ANSWER  
 
  END  

    AREA factorial,CODE
ENTRY
                       ;program to find factorial
    MOV  R0,#1             ;int c =1
    MOV  R1,#6             ;int n=1
    MOV  R3,#1             ;int fact=6
    BL loop
    B out

loop                                         ;what is the error
        MUL R4,R3,R0
        ADD R0,R0,#1
        CMP R0,R1
        BLE loop
         MOV PC,LR

END

解决方案

loop                                         ;what is the error

try 1) (note the colon)

loop:                                         ;what is the error

2) RTFM !!!!

AREA factorial,CODE
    ENTRY
                           ;program to find factorial
    MOV  R0,#1             ;int c =1
    MOV  R1,#6             ;int n=1
    MOV  R3,#1             ;int fact=6
    BL loop
    B STOP

loop
        MUL R4,R3,R0
        MOV R3,R4
        ADD R0,R0,#1
        CMP R0,R1
        BLE loop
        MOV PC,LR
STOP B STOP                 ;R4 IS FINAL ANSWER

    END

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