overdrivenpotato / overdrivenpotato/rust-psp
Missing VFPU Instructions
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- Dominant language
- Rust
- Stars
- 826
- Forks
- 44
- Avg merge
- 6d 10h
- Merged PRs (30d)
- 3
Description
After #160 is merged, we are missing the following.
Missing Instructions (0/14)
| ? | Inst | Ops | Enc |
|---|---|---|---|
| ⬜ | bvf | vfpu-branch | vfpu-branch |
| ⬜ | bvfl | vfpu-branch | vfpu-branch |
| ⬜ | bvt | vfpu-branch | vfpu-branch |
| ⬜ | bvtl | vfpu-branch | vfpu-branch |
| ⬜ | lvl.q | vfpu-load16 | vfpu-memory-quad |
| ⬜ | lvr.q | vfpu-load16 | vfpu-memory-quad |
| ⬜ | svl.q | vfpu-store16 | vfpu-memory-quad |
| ⬜ | svr.q | vfpu-store16 | vfpu-memory-quad |
| ⬜ | vcmovf | vfpu-condmove | vfpu-condmove |
| ⬜ | vcmovt | vfpu-condmove | vfpu-condmove |
| ⬜ | vcmp | vfpu-compare | vfpu-alu-compare |
| ⬜ | vmfvc | vfpu-control-read | vfpu-read-control |
| ⬜ | vmtvc | vfpu-control-write | vfpu-write-control |
| ⬜ | vwbn | vector-unary-mod | vector-imm8 |
Do note that lvl.q / lvr.q corrupt registers and when implemented, we should probably add a mitigation to save/restore the affected COP1 register. Shouldn't be too difficult to do with the existing macro magic.
Contributor guide
No contributing guide indexed for this repository
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Review issue #160 and the existing VFPU instruction macro implementations first, then consult the linked VFPU documentation for the listed encodings and errata. Done means all 14 instructions are implemented, with mitigation for the corrupt COP1 registers affected by lvl.q and lvr.q.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- embedded-iot
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100