41 lines
1.4 KiB
NASM
41 lines
1.4 KiB
NASM
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bits 64
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SECTION .data
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; empty
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SECTION .text
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global _start
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_start:
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%include "header.asm.inc"
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; division: 17 / 4 (in 64-bit)
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mov rcx, 4 ; divisor
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mov rax, 17 ; dividend (LSB)
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mov rdx, 0 ; dividend (MSB)
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div cl ; 8-bit divisor, dividend is in AX
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; ---> al = 4 (quotient), ah = 1 (remainder)
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mov rax, 17 ; dividend (LSB)
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mov rdx, 0 ; dividend (MSB)
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div cx ; 16-bit divisor, dividend is in DX:AX
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; ---> ax = 4 (quotient), dx = 1 (remainder)
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mov rax, 17 ; dividend (LSB)
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mov rdx, 0 ; dividend (MSB)
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div ecx ; 32-bit divisor, dividend is in EDX:EAX
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; ---> eax = 4 (quotient), edx = 1 (remainder)
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mov rax, 17 ; dividend (LSB)
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mov rdx, 0 ; dividend (MSB)
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div rcx ; 64-bit divisor, dividend is in RDX:RAX
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; ---> rax = 4 (quotient), rdx = 1 (remainder)
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; challenge: 254 % 16
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mov rcx, 16 ; divisor (64-bit)
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mov rax, 0xfe ; dividend (LSB)
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mov rdx, 0 ; dividend (MSB)
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div rcx ; ---> rax = 15 (quotient), rdx = 14 (remainder)
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%include "sysexit.asm.inc"
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