arch-vega: Add decoding for implemented insts

Certain instructions were implemented in instructions.cc,
but weren't actually being decoded by the decoder, causing
the decoder to return nullptr for valid instructions.

This patch fixes the decoder to return the proper instruction
class for implemented instructions

Change-Id: I8d8525a1c435147017cb38d9df8e1675986ef04b
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/47521
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Reviewed-by: Matthew Poremba <matthew.poremba@amd.com>
Reviewed-by: Alex Dutu <alexandru.dutu@amd.com>
Maintainer: Matt Sinclair <mattdsinclair@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
1 file changed