A digital system and method of operation is which the digital system has a
processor with a virtual machine environment for interpretively executing
instructions. First, a sequence of instructions is received (404) for
execution by the virtual machine. The sequence of instructions is
examined (408 414) to determine if a certain type of iterative sequence
is present. If the certain type of iterative sequence is present, the
iterative sequence is replaced (412) with a proprietary code sequence.
After the modifications are complete, the modified sequence is executed
in a manner that a portion of the sequence of instructions is executed in
an interpretive manner (418); and the proprietary code sequences are
executed directly by acceleration circuitry (420).