30 lines
1.7 KiB
Markdown
30 lines
1.7 KiB
Markdown
# [Day 4](https://adventofcode.com/2022/day/4)
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:gift::gift::gift::gift:
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Today's language: **gnu x86-64** (and alternatively **C**)
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Today I wanted to use ChatGPT to solve the tasks using *gnu* **x86-64 assembly**, which I have never used before
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(I did some small things in [6502-asssembly](https://github.com/MatthiasQuintern/6502), so it wasn't all new).
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The prompt can be seen in `prompt.md`, the original file in `day4-by-ai.s`.
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It did a lot of things right, however it also did a lot of things wrong:
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- It did generate x86 (32-bit) code because I did not specify x86-64. So I changed the `int $0x80` system calls to use `syscall` (which also meant I had to change all the registers and [syscall numbers](https://filippo.io/linux-syscall-table/))
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- It did get the argument order for `sscanf` wrong, even when I specifically asked, it told me that the buffer to read comes last
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- It did not correctly implement the logic to test for containment of the two ranges
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- It sometimes gave me wrong syscall numbers (they were just wrong, not even x86)
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- It told me the `read` syscall can read until a newline by passing `\n` as last arg
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So I had to fix all that. I tried to exclusively use the AI to get answers to my questions, however I did sometimes revert to the internet.
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It was still a good starting point and provided lots of help.
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At the end of the ~~evening~~ next morning I had successfully coded the task in x86-64 assembly! :smiley:
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I also gave it the exact same prompt again but said I wanted it in **C**.
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It instantly produced compile-able c `day4-by-ai.c` code that gave the right answer...
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```shell
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# for the assembly program
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make asm
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./day4
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# for the c promgram
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make c
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./day4 "section-pairs.txt"
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```
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