Data processing apparatus having opcode extension register

Details Data processing apparatus having opcode extension register Data processing apparatus having opcode extension register

G - Physics

06

F

354/230.74

G06F 9/22 (2006.01) G06F 9/318 (2006.01)

Patent

CA 1123959

33. DATA PROCESSING APPARATUS HAVING OPCODE EXTENSION REGISTER Abstract of the Disclosure A Central Processing Unit (CPU) includes a hardware op-code extending register (OER) for storing a code for programmable selection of optional CPU features which modify processor operations defined by the op-code in each instruction. A control section in the CPU decodes both the op-code of a current instruction and the code in the OER, effectively combining the two to form an extended op-code capable of defining a larger set of processor operations than the op-code carried in each instruction, The code in the OER is changed only when the CPU executes an instruction for transferring a new code into OER. Thus the code in OER can remain stationary over many instruction cycles. A CPU architecture having an OER permits the set of processor operations for the CPU to be expanded without increasing the instruction length. The advantages provided are reduced memory overhead for program storage and increased processing efficiency in data processing systems having a small word size.

342084

Affiliated with

Also associated with

Rating

Data processing apparatus having opcode extension register does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Data processing apparatus having opcode extension register, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data processing apparatus having opcode extension register will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-141891