Starting October 12th, 2023 GitHub is enforcing mandatory two-factor authentication on my account.
I'm not going to comply and move all my activity to GitLab instead.
Any future updates / releases will be available at: https://gitlab.com/gitendo/lz4gb
Thanks and see you there!
My attempt at creating fast and small LZ4 unpacker in LR35902 assembly. Currently it takes 73 bytes and doesn't use RAM/HRAM during the process. This however required some small changes in data format. I've removed header data, reversed the order of match distance and length bytes and shortened end sequence. Also, match distance is stored as negative value from now on.
unlz4gb.asm- RGBASM syntaxunlz4gb.s- Intelligent Systems assembler syntax
To use it in your project compile modified smalLZ4 from my repo (original by Stephan Brumme) and compress your data using -g option: smallz4 -g data.raw data.lz4 then decompress on GB/C using included source.
If you're interested how it stands compared to other packers visit my Game Boy Compression Playground for more detailed info.