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, 2006
Filed:
Jun. 10, 2003
Tetsuya Yamada, Kodaira, JP;
Naohiko Irie, Kokubunji, JP;
Takanobu Tsunoda, Kokubunji, JP;
Takahiro Irita, Higashimurayama, JP;
Keisuke Toyama, Yokohama, JP;
Masayuki Kabasawa, Kokubunji, JP;
Tetsuya Yamada, Kodaira, JP;
Naohiko Irie, Kokubunji, JP;
Takanobu Tsunoda, Kokubunji, JP;
Takahiro Irita, Higashimurayama, JP;
Keisuke Toyama, Yokohama, JP;
Masayuki Kabasawa, Kokubunji, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
The present invention provides a hardware accelerator, which allows faster switching between processing modes. In an information processing device with a bytecode accelerator BCA for translating a stack-based intermediate code (bytecode) into register-based instructions, a selector SEL for switching between BCA and soft VM is posed between an instruction part FET and a decode part DEC and data transfer paths Pand Pare formed between BCA and the register file REG_FILE. When bytecode accelerator BCA is activated, the Pside is selected by the selector SEL and the translated CPU instructions are transferred to the decode part DEC. If the intermediate language code cannot be translated by the BCA, the processing mode is switched to software processing. During switching between the modes, internal information of BCA can be transferred between BCA and REG_FILE in parallel, achieving faster mode switching.