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:
Feb. 06, 2001
Filed:
Dec. 21, 1995
Siamak Arya, Palo Alto, CA (US);
Intergraph Corporation, Huntsville, AL (US);
Abstract
An apparatus and method are described for implementing handling of exceptions caused by speculated instructions in a CPU having speculative execution capabilities. A CPU implementing speculative execution contains a speculative bit register file. Each speculative bit in the speculative bit register file is logically associated with a particular general purpose register, while remaining physically separate. This is accomplished through the use of a physically separate register file (the speculative bit register file) and register selection circuitry allowing simultaneous access to the two register files. The present invention provides instruction execution hardware supporting speculative execution with minimal impact on computational and structural complexity.