TRCIT Trace Instrumentation Trace Instrumentation generates an instrumentation trace packet that contains the value of the provided register. SYS 1 1 0 1 0 1 0 1 0 0 0 0 1 0 1 1 0 1 1 1 0 0 1 0 1 1 1 TRCIT <Xt> SYS #3, C7, C2, #7, <Xt> Unconditionally <Xt> Is the 64-bit name of the general-purpose source register, encoded in the "Rt" field.