A new class
of general purpose computers called Programmable Reduced Instruction Set
Computers (PRISC) use RISC techniques a basis for operation. In addition to the
conventional RISC instructions, PRISC computers provide hardware programmable
resources which can be configured optimally for a given user application. A
given user application is compiled using a PRISC compiler which recognizes and
evaluates complex instructions into a Boolean expression which is assigned an
identifier and stored in conventional memory. The recognition of instructions
which may be programmed in hardware is achieved through a combination of bit
width analysis and instruction optimization. During execution of the user
application on the PRISC computer, the stored expressions are loaded as needed
into a programmable functional unit. Once loaded, the expressions are executed
during a single instruction cycle (Full Patent Here).