The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 31, 1996
Filed:
Jan. 21, 1994
Applicant:
Inventors:
Elliot A Sowadsky, Santa Clara, CA (US);
Larry Widigen, Salinas, CA (US);
David L Puziol, Sunnyvale, CA (US);
Korbin S Van Dyke, Fremont, CA (US);
Assignee:
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395800 ; 395386 ; 39542108 ; 3642318 ; 3642613 ; 3642624 ; 364D / ;
Abstract
An execution unit performs multiple sequential instruction pointer updates and segment limit checks within a cycle. The updates and checks are carried out in a high-performance pipelined processor that speculatively executes variable length instructions. A disclosed embodiment of the execution unit includes Next EIP (Extended Instruction Pointer) selection logic, Current EIP selection logic, an EIP History RAM, a Dual EIP Adder, a CS Limit check adder, limit checking combinational logic, and a limit fault History RAM.