ARM7 Assembly code that computes the Factorial error: A1163E: Unknown opcode loop , expecting opcode or Macro

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    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

Posted 13-Nov-13 18:05pm

Shta

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2 solutions

Solution 2

CSS

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

Posted 4-Jun-15 11:34am

Member 11742738

Comments

CHill60 4-Jun-15 18:05pm

You've actually duplicated the original error ... missing colon :

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Garth J Lancaster · Accepted Answer · 2013-11-13T18:22:00

Solution 1

VB

loop                                         ;what is the error

try 1) (note the colon)

loop:                                         ;what is the error

2) RTFM !!!!

Posted 13-Nov-13 18:22pm

Garth J Lancaster