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:
Jan. 09, 2001
Filed:
Aug. 11, 1999
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A data processing apparatus includes plural data registers, an arithmetic logic unit and a status register. The status register stores a plurality of different types of status bits. These status bits could be a negative status bit, a carry status bit, an overflow status bit and a zero status bit. These status bits are normally set dependent upon the condition of the result generated by the current arithmetic logic unit operation. A status bit protect instruction type permits selection of status bits protected from modification corresponding to the current arithmetic logic unit result. This status bit protect instruction preferably includes individual protect bit corresponding to each status bit. If a protect bit has a first digital state, then the corresponding status bit may be modified corresponding to the current arithmetic logic unit result. If the protect bit has a second opposite digital state, then the corresponding status bit is protected from modification according to the arithmetic logic unit results.