Interpreter: msr spsr, r0 crashes

[matanlurey]

Invalid argument(s): Invalid ArmOperatingMode: 8

This occurs in the following scenario:

;@0xe8:
mov r0, 18
  ;r0        << 0x12

;@0xec:
msr spsr, r0
  ;r0        >> 0x12

It's worth checking 0x12 causes a crash, and what it should actually be doing.