Write and assembly language code to calculate a factorial of n number using a recursion.
.global main
main:
mov r0,#5 // 5 is the number that I want to calculate the factorial
mov r1,r0
factorial:
cmp r1,#1
beq end
sub r1,r1,#1 // n-1
push {ip,lr} // save the lr
bl factorial
mul r0,r1,r0 // multiply r0 * n-1
pop {ip,lr}
end:
bx lrWrite and assembly language code to calculate a factorial of n number using a recursion.
ORG 100H
.DATA
FACTORIAL DB 0
.CODE
MAIN PROC
PUSH 5
CALL FIND_FACTORIAL
RET
MAIN ENDP
FIND_FACTORIAL PROC
MOV BP, SP
MOV AX, [BP+2]
CMP AX, 1
JNE AGAIN
MOV FACTORIAL, 1
JMP EXIT
AGAIN:
DEC AX
PUSH AX
CALL FIND_FACTORIAL
MOV BP, SP
MOV AX, [BP+2]
MOV BL, FACTORIAL
MUL BL
MOV FACTORIAL, AL
EXIT:
RET 2
FIND_FACTORIAL ENDPCopyright © 2021 Codeinu
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