s_setreg_imm32_b32 is a 64-bit instruction, using a 32-bit literal constant. Related functions are added to support decoding the second dword. Change-Id: I290f8578f726885c137dbfac3773035f814e0a3a Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/29942 Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.com> Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Xianwei Zhang <xianwei.zhang@amd.com>