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:
Jul. 08, 2003
Filed:
Feb. 22, 2000
Applicant:
Inventors:
John H. Arends, Austin, TX (US);
Jeffrey W. Scott, Austin, TX (US);
William C. Moyer, Dripping Springs, TX (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 1/100 ;
U.S. Cl.
CPC ...
G06F 1/100 ;
Abstract
A method for debug control in a pipelined data processor where an offset is determined for the program counter (PC) based on the state of the pipeline. The offset is subtracted from the PC value at the end of a debug session. The resultant PC value restarts fetching of a last unsuccessfully completed instruction. If the offset indicates a change to the PC value, the instruction register is adjusted to a nop to allow the pipeline to restart execution after the last successfully completed instruction. In one embodiment, the state of the machine is preserved prior to exception handling.