F/RCR    R1, R2 or memory/immediate
         R1, R2 or memory/immediate, dt_flags
         R1, R2 or memory/immediate, dt_flags, d_sign-1
         R1, R2 or memory/immediate, dt_flags, d_sign-1, d_abs-1
         R1, R2 or memory/immediate, dt_flags, d_sign-1, d_abs-1, d_negate-1
         R1, R2 or memory/immediate, dt_flags, d_sign-1, d_abs-1, d_negate-1, R3 or shift_immediate
