Further work on Unicode/UTF-8 support in PSL.
PSL disassembler for x64: correct display of call instruction with
PSL for x64: correct a subtle bug in the compiler that came with one of the latest changes.
PSL compiler for aarch64: implement CINV, CCMN, CCMP instructions
PSL compiler for aarch64: implement conditional select instructions (CSEL etc.)
Minor change to PSL kernel code
PSL whitespace and comment cleanup
PSL for x64: Reinstate a line in lap code that was accidentally deleted in last checkin.