Add COPCODE == 4 condition to ensure the available instruction is either c_jr or c_jalr and the flag IsReturn should set for instruction c_jalr if RC1 == t0 Change-Id: I1b39a6c1dc52c8035f16cc64a1b4c494b14879c0 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/66811 Maintainer: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Yu-hsin Wang <yuhsingw@google.com>