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:
Jun. 30, 2009
Filed:
May. 24, 2005
Sorin Iacobovici, San Jose, CA (US);
Sorin Iacobovici, San Jose, CA (US);
Sun Microsystems, Inc., Santa Clara, CA (US);
Abstract
A processor that protects an execution pipeline includes a residue-based error detection infrastructure including a first logic for computing a first residue of a result of an executed instruction instance, and a second logic for computing a second residue of the result. The second logic applies arithmetic operations of the executed instruction instance to residues of operands of the instruction instance. The execution pipeline includes registers and one or more arithmetic execution units. A method of protecting an execution pipeline includes performing one or more operations of an instruction instance on residues of operands of the instruction instance, computing a first residue of a result of the operations on the operand residues, computing a second residue from a result of executing the instruction instance, and checking the first residue against the second residue to determine whether errors were introduced while the instruction instance was resident in the execution pipeline.