duna

An assembly simulator built in Rust.

See also

Venus
SPIM

Current functionality

Run by CLI with cargo run <INPUT_FILE>
RISC-V
- Supports most of RV32IM and RV64IM
- Supports a few ecalls
MIPS
- WIP

Roadmap

RISC-V

Finish multiplication extension
Figure out which CSRs to support

OS/Memory

Fix page table/TLB lol
Instruction decoding + instruction fetches
Distinguish between IMEM/DMEM
Interrupts?
Kernel memory?
Fence instructions
Configurable cache hierarchy, store buffers

Interface

Standard library functions
CLI configuration
Support assembler relocation functions
Display regfile, memory, and cache info
Ability to poke values in registers, memory, etc. (add sources/causes to diff structs?)
Provide debugger support a la GDB, possibly valgrind-like tools as well?
Implement peephole optimizations + visualizations

Niceties

Add hints/warnings
Run riscv compliance tests

Other ISAs?

MIPS 32/64bit? whatever they're called?
Atmel AVR
ARM
x86-64
wasm
some LLVM IR