reading mtinst gives illegal instruction exception

[omerguzelelectronicguy]

If I understand correctly from spec, mtinst is a WARL register that can be written by machine mode. However, reading it in machine mode when the H extension is not opened, caused an illegal instruction exception.

Should not the correct behaviour be reading legal value of mtinst in machine mode?

[jerryz123]

mtinst is part of H, so if misa.H is unset (which I assume is what you mean by "H extension is not opened"), reads to mtinst will trap with illegal instruction.