Title:
CENTRAL PROCESSING UNIT OF SUPERSCALAR PROCESSOR
Document Type and Number:
Japanese Patent JP3851707
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To analyze a resource, etc., within a processor cycle by a central processing unit containing a grouped logical circuit, a function unit which can carry out an instruction dispatched by it and pipeline stages and executing a check of resource arrangement, etc., through a processor cycle.
SOLUTION: A grouped logical circuit 109 dispatches up to four instructions in every processor cycle. A completion unit 110 retires an instruction when the instruction is completed. When data of a dispatched load instruction are returned from main memory, a CPU 100 arranges these data in a pipeline format to be stored in cache memory in the 2nd level. A floating-point adder 106 and a floating-point multiplier 107 separately have a four stage pipeline. Similarly, a load/storage unit 103 has a two stage pipeline.
Inventors:
Mark Trenbrae
Application Number:
JP15173897A
Publication Date:
November 29, 2006
Filing Date:
June 10, 1997
Export Citation:
Assignee:
Sun Microsystems, Inc.
International Classes:
G06F9/38; (IPC1-7): G06F9/38; G06F9/38
Domestic Patent References:
| JP6501124A | ||||
| JP4502824A | ||||
| JP7505494A |
Attorney, Agent or Firm:
Yoichi Oshima