Analyses 68000 assembly source to profile resource and size data. For each instruction it will tell you.
- CPU cycles
- Bus read cycles
- Bus write cycles
- Size in bytes
You can try out the tool in a web-based version.
To analyse a source file run:
npx 68kcounter mysource.s
This will output each line prefixed with profile data in the following format:
[cycles]([reads]/[writes]) [size]
See npx 68kcounter --help for more options.
Available as VS Code extension to provide live annotations and totals.
- Because it analyses your pre-assembled source, it can't take into account optimisations made by your assembler.
- Total timings for a whole file are pretty meaningless as it doesn't take into account branching etc, but it can be useful for smaller blocks.
- While it adds profile information inside any macro definitions, it doesn't currently process macro invocations
- Where timings are based on an 'n' multiplier from an immediate value, it will parse simple expressions but doesn't currently substitute constants defined elsewhere.