Decoding RV64 as a RV32 instruction

Created by: AyoubJalali

Is there an existing CVA6 bug for this?

• I have searched the existing bug issues

Bug Description

I generate some illegal instruction (illegal opcode 0x232532af), and I found that an instruction is actually a RV64A instr, the problem is the CV32A60X decode it, without raising an exception. So I think it's a BUG in the decoder, if you wanna reproduice the BUG you just need to inject the instruction 0x232532af in your test.S