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:
Jan. 11, 2005
Filed:
Feb. 08, 2000
Masayuki Yamasaki, Osaka, JP;
Minoru Okamoto, Osaka, JP;
Masayuki Yamasaki, Osaka, JP;
Minoru Okamoto, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An execution control instruction is applied to an information processor of the type processing instructions by pipelining to suppress the occurrence of branch hazard. The execution control instruction contains: a condition field for specifying an execution condition; and an instruction-specifying field for defining, in binary code, the number of instructions to be executed only conditionally. In response to the execution control instruction, a nullification controller decides, based on control flags provided from an arithmetic logic unit, whether or not the execution condition specified by the condition field is satisfied. And based on the outcome of this decision, the controller determines whether or not that number of instructions, which has been defined by the instruction-specifying field for instructions succeeding the execution control instruction, should be nullified. If the controller has determined that the specified number of succeeding instructions should be nullified since the execution condition is not met, then the controller asserts a nullification signal to be supplied to the arithmetic logic unit. In this manner, a large number of succeeding instructions are executable conditionally using an execution control instruction of a short word length.