2021-10-02 09:10:03 -04:00
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extern puts
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2021-10-04 15:15:14 -04:00
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extern libz_atoi
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2021-10-02 18:48:39 -04:00
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2021-10-02 09:10:03 -04:00
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section .data
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text db "Number reaches 1",0
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even db "even",0
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odd db "odd",0
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2021-10-04 15:15:14 -04:00
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number dq "3761683061822795265",0
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2021-10-02 18:48:39 -04:00
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tempstore db 0
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2021-10-02 09:10:03 -04:00
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section .text
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global main
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main:
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sub rsp, 8
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2021-10-04 15:15:14 -04:00
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; add rsi, 8
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; mov r8, [rsi]
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; mov r9, [r8]
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; mov [tempstore], r9
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2021-10-02 18:48:39 -04:00
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mov rdi, number
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2021-10-04 15:15:14 -04:00
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call libz_atoi
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2021-10-02 18:48:39 -04:00
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mov r8, rax
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2021-10-02 09:10:03 -04:00
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_loop:
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cmp r8, 1 ;if number is 1 then end
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je _printstupid
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test r8, 1 ;odd even check
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jnz _odd
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jz _even
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_odd:
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; mov rdi, odd
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; cld
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; call puts
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mov rax, r8 ; gotta do this because mul only takes one argument
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mov r9, 3
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mul r9
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add rax, 1
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mov r8, rax
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jmp _loop
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_even:
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; mov rdi, even
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; cld
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; call puts
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xor rdx, rdx
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mov rax, r8
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mov rcx, 2
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div rcx
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mov r8, rax
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jmp _loop
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_printstupid:
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mov rdi, text
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cld
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call puts ;this is the put s way of printing a string
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_end:
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add rsp, 8
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ret
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