Factorial of a number | Microcontroller | VTU Program's | BCS402 | Keil | Arm programming
#microcontrollers #keil #microcontroller_lab #vtu #embeddedsystem
Write a program to find factorial of a number
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AREA FACTORIAL , CODE, READONLY
ENTRY ;Mark first instruction to execute
START
MOV r0, #7 ; STORE FACTORIAL NUMBER IN R0
MOV r1,r0 ; MOVE THE SAME NUMBER IN R1
FACT SUBS r1, r1, #1 ; SUBTRACTION
CMP r1, #1 ; COMPARISON
BEQ STOP
MUL r3,r0,r1; ; MULTIPLICATION
MOV r0,r3 ; Result
BNE FACT ; BRANCH TO THE LOOP IF NOT EQUAL
STOP
NOP
NOP
NOP
END ;Mark end of file