An instruction set is provided which has a first field for describing an execution
instruction for designating content of an operation or data processing that is
executed in at least one processing unit forming a data processing system, and
a second field for describing preparation information for setting the processing
unit to such a state that is ready to execute an operation or data processing that
is executed according to the execution instruction, thereby making it possible
to provide a control program having the instruction set in which preparation information
independent of the execution instruction described in the first field is described
in the second field. Accordingly preparation for execution of the subsequent execution
instruction is made based on the preparation information. In the instruction set,
since destination of branch instruction is described in the second field and is
known in advance, the problems that cannot be solved with a conventional instruction
set can be solved.
