i guess it's worth mentioning with qemu-user that you can totally run arm code on amd64 hardware, though sometimes things work that shouldn't, so it's not an ideal testing environment. i did a demo of this last year in https://asciinema.org/a/622461
i think the particular thing i ran into was that supposedly actual arms require an instruction cache flush before executing newly jit-compiled instructions and qemu didn't, so not exactly opcodes
