Questions tagged [x86-family]
This challenge is related to the x86 family of instruction set architectures. Note that challenges that require the answers to be in a specific language are generally discouraged.
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8086 Segment Address to Linear
Given an 8086 segmented ("logical") memory address, output its actual linear physical address.
A segmented memory address has format xxxx:xxxx, where each ...
- 19.1k
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fastest matrix multiplication on x86
This challenge requires integration with C, so you can stop reading if you're not interested.
Matrix multiplication is a simple operation, but the performance depends a lot on how efficiently the code ...
- 2,325
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Red screen in FIVE bytes or less (msdos)
Your program is supposed to create a full red screen in MSDOS. The source of the binary (.com file) must be 5 bytes or less. No wild assumptions, the binary must work in MsDos, DosBox, and FreeDos ...
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9
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Is the program 32 or 64 bits?
Assignment is simple to explain: write the shortest code you need to determine whether an executable binary program supplied as parameter is 32 or 64 bits.
If there is a different kind of bitness, ...
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35
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Tips for golfing in x86/x64 machine code
I noticed that there's no such question, so here it is:
Do you have general tips for golfing in x86/x64 machine code? If the tip only applies to a certain environment or calling convention, please ...
- 16.7k
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Bootloader golf: Brainf***
Create a bootloader that executes given Brainfuck program. This is code-golf, so the program with least bytes wins. Being a bootloader, the size of the program is counted in non-zero bytes in the ...
- 3,250
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2
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Build the busiest beaver in x86 machine code in 32 bytes or less
Your task is to write a program in x86 machine language (any version you like) that will run through as many instructions as possible and then halt, using a maximum of 32 bytes of code and starting ...
- 34.6k
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Branch differently in x86 / x86-64 using only printable visible ASCII characters in the machine code
The task is simple: write a program that branches differently in x86 (32-bit) and x86-64 (64-bit) using only printable visible ASCII characters 0x21...0x7e (space and del are not allowed) in the ...
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