[SystemZ] Add program mask and addressing mode instructions

Add several instructions that operate on the program mask
or the addressing mode.  These are not really needed for
code generation under Linux, but are provided for completeness
for the assembler/disassembler.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@286284 91177308-0d34-0410-b5e6-96231b3b80d8
8 files changed