encounter
/
ppc750cl
mirror of https://github.com/encounter/ppc750cl.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
Rust tools for PowerPC 750CL
127 Commits 4 Branches 0 Tags 522 KiB
Rust 100%
Go to file
Luke Street d161deca50 Add badges to README.md & add documentation keys 2024-09-09 19:28:14 -06:00
.github/workflows Always build CI on push 2023-01-14 13:27:34 -05:00
asm Add badges to README.md & add documentation keys 2024-09-09 19:28:14 -06:00
disasm Add badges to README.md & add documentation keys 2024-09-09 19:28:14 -06:00
fuzz Use workspace.package fields & update deps 2024-09-09 19:13:44 -06:00
genisa Use workspace.package fields & update deps 2024-09-09 19:13:44 -06:00
.gitignore Read from DOL 2021-08-22 04:09:51 +02:00
Cargo.lock Add readme key to Cargo.toml 2024-09-09 19:19:58 -06:00
Cargo.toml Add readme key to Cargo.toml 2024-09-09 19:19:58 -06:00
LICENSE-APACHE Rewrite the entire crate, add assembler 2024-03-14 00:55:08 -06:00
LICENSE-MIT Rewrite the entire crate, add assembler 2024-03-14 00:55:08 -06:00
README.md Add badges to README.md & add documentation keys 2024-09-09 19:28:14 -06:00
isa.yaml Rewrite the entire crate, add assembler 2024-03-14 00:55:08 -06:00
rustfmt.toml Rewrite the entire crate, add assembler 2024-03-14 00:55:08 -06:00

README.md

ppc750cl Build Status Latest Version Api Rustdoc Rust Version

Rust tools for working with the PowerPC 750CL family of processors.

Building

cargo run --package ppc750cl-genisa
cargo build --release

Instruction Set

For those unfamiliar with PowerPC, here are some basics.

  • PowerPC 7xx is a family of RISC CPUs produced from 1997 to 2012.
    • They operate with 32-bit words and every instruction is 32-bits wide.
  • This project focuses (only) on compatibility with the PowerPC 750CL.
    • This chip is famously packaged as codename "Broadway" for the Nintendo Wii.
    • Its predecessor PowerPC 750CXe is used in the Nintendo GameCube.
    • It adds a "paired-singles" SIMD unit and a bunch of other instructions.

isa.yaml

The file isa.yaml contains a full definition of the PowerPC 750CL instruction set.

It powers the disassembler and assembler.

Similarly to LLVM TableGen, the program ppc750cl-genisa generates a Rust file implementing an instruction decoder.

Safety & Correctness

  • This project does not use unsafe Rust code outside of testing utils.
  • The disassembler has been fuzzed over all ~4.29 billion possible instructions (via ppc750cl-fuzz).
  • It is safe to run the disassembler over untrusted byte arrays.
  • However, no guarantees on correctness are made (yet). Expect bugs.

Performance

With a single thread on Ryzen 9 3900X:

  • Disassembling & printing: ~5M insn/s (~20 MB/s)
  • Disassembling only: ~50M insn/s (~200 MB/s)