On Mon, 9 Aug 2010 09:20:01 -0700, Edward Jaffe wrote: >David Bond wrote: >> Another possibility is that it is yet another undocumented instruction. >> Invariably the undocumented instructions are privileged. Once someone has a >> z196, all they have to do is attempt to execute C8x3 to see if the result >> is an operation exception or a privileged operation exception. > >And there are some instructions (like MVCX) that work only when fetching >from millicode.
Yes, Abe mentioned that as a possibility. Do you know the op-code for MVCX?
