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d0iasm / rvemu-for-book

Reference implementation for the book "Writing a RISC-V Emulator in Rust".
http://book.rvemu.app/
MIT License
361 stars 27 forks source link

Incorrect opcode? #2

Closed AlessandroMinali closed 3 years ago

AlessandroMinali commented 3 years ago

https://github.com/d0iasm/rvemu-for-book/blob/eedfb402e84548406dc34c44d91328f76b35232c/01/src/main.rs#L85-L88

You mention that this is the instruction for adding 64-bit integers. From the RISC-V spec this opcode is only for 32-bit integers.

AlessandroMinali commented 3 years ago

I think I may be misunderstanding something so I'll just close this.