arch-vega: Add decodings for new MI100 VOP2 insts

VOP2 with opcodes 55-61 were added in MI100 and are not in Vega10. This
changeset adds the decodings for these instructions.

The changeset does not implement the instructions, however the fatal
message is much more helpful for debugging compared so a generic
decode_invalid handler.

Change-Id: Ibde0880c35ff915bf8e50772df9ce263e55ca893
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/70042
Maintainer: Matt Sinclair <mattdsinclair@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
2 files changed