- add instrumentation macros for begin and end opcode.  These are usually   defined to be empty, so there should be no effect except for instrumentation
- add instrumentation macros for begin and end opcode.  These are usually
  defined to be empty, so there should be no effect except for instrumentation

marmolejo/bochs-zet,marmolejo/bochs-zet,marmolejo/bochs-zet,marmolejo/bochs-zet,marmolejo/bochs-zet