S390 assembler

I just take a look into the opcodes list of binutils for s390 and found the following entries:

b9b1 cu24 RRF_M0RR "convert utf-16 to utf-32" z9-109 zarch
b2a6 cu21 RRF_M0RR "convert utf-16 to utf-8" z9-109 zarch
b2a6 cuutf RRF_M0RR "convert unicode to utf-8" z9-109 zarch
b9b3 cu42 RRF_M0RR "convert utf-32 to utf-16" z9-109 zarch
b9b2 cu41 RRF_M0RR "convert utf-32 to utf-8" z9-109 zarch
b2a7 cu12 RRF_M0RR "convert utf-8 to utf-16" z9-109 zarch
b2a7 cutfu RRF_M0RR "convert utf-8 to unicode" z9-109 zarch
b9b0 cu14 RRF_M0RR "convert utf-8 to utf-32" z9-109 zarch

Since z9-109, it have own opcodes to convert between the different types of unicode.