[solved] program hangs for a second and crashes

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macomics

Joined: 26 Jan 2021
Posts: 1146
Location: Russia

macomics 17 Apr 2022, 19:08

Code:

  mov rax, [operand1]
  mov rcx, [operand2]
  cqo
  jrcxz @f
  idiv rcx
  jmp div_ok
 @@:
  fastcall [printf], "Div by 0\n"
  fastcall [getch]
  jmp start
 div_ok:
  mov rbx, rdx
  fastcall [printf], "%d", rax
  fastcall [printf], ", remainder is %s", rbx
  fastcall [getch] ; not call [getch]
  jmp start

17 Apr 2022, 19:08

retro

Joined: 12 Oct 2021
Posts: 47

retro 17 Apr 2022, 19:26

does that "e" mean "extended"?

17 Apr 2022, 19:26

retro

Joined: 12 Oct 2021
Posts: 47

retro 17 Apr 2022, 19:27

i mean, the "e" from "cdqe".

17 Apr 2022, 19:27

macomics

Joined: 26 Jan 2021
Posts: 1146
Location: Russia

macomics 17 Apr 2022, 19:39

retro wrote:

does that "e" mean "extended"?

That's about the logic that constantly captivates me. I always either forget "e" or vice versa.

17 Apr 2022, 19:39

retro

Joined: 12 Oct 2021
Posts: 47

retro 17 Apr 2022, 20:28

i fixed it, now it works like a charm, thank you guys!
now i'm gonna read a bit more about x64 assembly and in the future i'm gonna improve this calculator!

17 Apr 2022, 20:28

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