1. A microprocessor comprising: a processor; a first module including a first set of instructions written in a non-transitory computer-readable medium, the first module configured to execute the first set of instructions in bytecode in the processor; a second module including a second set of instructions written in a non-transitory computer-readable medium, the second module configured to execute the second set of instructions as microcode in the processor; and a data path shared by the first and second modules for accessing the processor, the data path including a storage section shared by both modules, the first and second modules configured to access the storage section independently, the first module accessing the storage section as an operand stack and the second module accessing the register file as a storage section.