U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Hardware extraction technique for programmable reduced instruction set computers

Patent 5819064 Issued on October 6, 1998. Estimated Expiration Date: Icon_subject November 8, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

System and method for compiling a source code supporting data parallel variables
Patent #: 5381550
Issued on: 01/10/1995
Inventor: Jourdenais, et al.

Method and apparatus for compiling computer programs with interproceduural register allocation
Patent #: 5428793
Issued on: 06/27/1995
Inventor: Odnert, et al.

Successive translation, execution and interpretation of computer program having code at unknown locations due to execution transfer instructions having computed destination addresses
Patent #: 5507030
Issued on: 04/09/1996
Inventor: Sites

System for monitoring computer system performance Patent #: 5539907
Issued on: 07/23/1996
Inventor: Srivastava, et al.

Inventors

Assignee

Application

No. 555058 filed on 11/08/1995

US Classes:

703/27, Compatibility emulation703/21, Computer or peripheral device703/22, Software program (i.e., performance prediction)712/200ARCHITECTURE BASED INSTRUCTION PROCESSING

Examiners

Primary: Trans, Vincent N.
Assistant: Mohamed, Ayni

Attorney, Agent or Firm

International Class

G06F 009/45

Abstract

A new class of 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.

Other References

  • M.D. Smith, "Tracing with pixie", Technical Report CSL-TR-91-497, Stanford University, Nov. 1991, pp. 1-2
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