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:
Apr. 16, 2002
Filed:
Jan. 31, 2000
Masashi Sasahara, Kawasaki, JP;
Kabushiki Kaisha Toshiba, , JP;
Abstract
There is disclosed DTLB in a microprocessor of the present invention, comprising an adder for adding a base address and a sign-extended offset address; a comparator for judging whether or not upper side 20 bits [ ] of the base address match the base address stored in a upper side address storage section in CAM and upper side 4 bits [ ] of the offset address match the offset address stored in the CAM; a comparator for judging whether or not a carry signal outputted from the adder and a carry signal stored in a carry storage section in the CAM are matched; and a match detector for outputting a match signal when comparison results of the comparators are matched. With lower side 12 bits of the virtual address, the judgment of match/mismatch is performed only with the carry signal. Therefore, the match/mismatch of the virtual address can be judged before the addition processing in the adder is completed.