ARCv3: qemu fails by VMAX2 instruction

[pavelvkozlov]

Running linux kernel selftests, I've faced another QEMU issue on ARCv3 32-bit system.

# uname -a
Linux buildroot 5.16.0-711679-g5a70af7c9bd7 #2 PREEMPT Mon May 29 16:27:03 +04 2023 arc32 GNU/Linux
# /usr/lib/kselftests/run_kselftest.sh -t proc:read
kselftest: Running tests in proc
TAP version 13
1..1
# selftests: proc: read
qemu-system-arc: ../qemu/target/arc/semfunc-mapping.def:660: arc_gen_VMAX2: Assertion `"SOME SEMFUNC " "VMAX2" " WAS NOT IMPLEMENTED" == 0' failed.
./qemu-arc32-run-ram0.sh: line 21:  1631 Aborted                 $ARC_QEMU_PATH/qemu-system-arc -cpu hs5x -M virt,ram_start=0 -m 2048 -display none -kernel $IMAGE -netdev tap,id=net0,ifname=$TAP,script=no,downscript=no -device virtio-net-device,netdev=net0 -drive file=$SWAP,format=raw,id=hd0 -device virtio-blk-device,drive=hd0 --global cpu.freq_hz=30000000 -nographic

The vmax2 instruction appears in the linux kernel code, I can provide an image upon request.

[claziss]

Here are a number of issues:

• Wrong GNU encoding for VMAX2. It uses the same HS6x encoding, and it should be different.
• Wrong GNU encoding for VMIN2. It uses the same HS6x encoding, and it should be different.
• QEMU assertion.