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:
May. 02, 1989
Filed:
Apr. 22, 1986
Applicant:
Inventor:
Kenichi Wada, Sagamihara, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ;
U.S. Cl.
CPC ...
364200 ; 3642551 ; 3642617 ;
Abstract
In the pipeline data processing system, a branch instruction is preliminarily detected from a string of instructions to be executed before execution thereof and the branch address is calculated. When the branch address is thereafter changed due to a change in the content of the register used to calculate the branch address, the calculated branch address is invalidated and a new branch address is calculated and the branch is executed. The change of the branch address is checked and performed on a basis of the comparison between the fields used for address calculation and the field of the address into which the data is to be written.