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:
Oct. 17, 2000
Filed:
Dec. 12, 1997
Gerald D Zuraski, Jr, Austin, TX (US);
Shane Southard, Cedar Park, TX (US);
Mauricio Calle, Austin, TX (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
A superscalar microprocessor predecodes instruction data to identify the boundaries of instructions and the type of instruction. When the cache line is scanned for dispatch, the first scanned instruction is predicted to be a microcode instruction and is dispatched to the MROM unit. A microcode scan circuit uses the location of the first scanned instruction and the functional bits of the predecode data to multiplex instruction specific bytes of the first scanned instruction to the MROM unit. If the first scanned instruction is not the first microcode instruction, then in a subsequent clock cycle, the first microcode instruction is dispatched the MROM unit and the mispredicted instruction is canceled.