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:
Jul. 28, 2009
Filed:
Apr. 26, 2007
Victor Suba, Foster City, CA (US);
Stewart Saragaison, Foster City, CA (US);
Brian Watson, Foster City, CA (US);
Victor Suba, Foster City, CA (US);
Stewart Saragaison, Foster City, CA (US);
Brian Watson, Foster City, CA (US);
Sony Computer Entertainment Inc., Tokyo, JP;
Abstract
An emulator uses code translation and recompilation to execute target computer system applications on a host computer system. Target application code is partitioned into target application code blocks, and related target application code blocks are combined into block groups and translated. Translated application code block groups are sized to comply with restrictions on branch instruction size. Upon selecting an application code block group for execution, a cache tag is used to determine if a corresponding translated code block group is available and valid. If not, the block group is translated and executed. Sequentially executed translated code blocks are located in adjacent portions of memory to improve performance when switching between translated code blocks. The emulator may use a link register of the host computer system to prefetch instructions and data from translated code blocks. The emulator also takes into account structural hazards in translating instructions.