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. 02, 1996
Filed:
Sep. 19, 1994
Hideki Ando, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
Availability flag registers are used for storing flags ia1-ia4 indicating the availability of instructions IR1-IR4 stored in an instruction register. The flags ia1-ia4 are controlled in accordance with misalignment information which represents the degree of an address accessing an instruction cache being shifted from a four word boundary. Upon determining whether or not issuance of an instruction from instruction decoder is possible, it is determined to be unissuable if an availability flag corresponding to each instruction is off. A logic structure for nullifying an instruction stored in an instruction register, when an address in accessing instruction cache 1 is shifted from the four word boundary is implemented without providing the instruction register with a resetting function, and thus a circuit for implementing this logic can be constructed with a reduced number of transistors.