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:
Mar. 06, 2007
Filed:
Feb. 09, 2005
Juergen Haess, Schoenaich, DE;
Michael Kroener, Ehningen, DE;
Dung Quoc Nguyen, Austin, TX (US);
Lawrence J. Powell, Jr., Round Rock, TX (US);
Eric M. Schwarz, Gardiner, NY (US);
Son Dao-trong, Stuttgart, DE;
Raymond C. Yeung, Round Rock, TX (US);
Juergen Haess, Schoenaich, DE;
Michael Kroener, Ehningen, DE;
Dung Quoc Nguyen, Austin, TX (US);
Lawrence J. Powell, Jr., Round Rock, TX (US);
Eric M. Schwarz, Gardiner, NY (US);
Son Dao-Trong, Stuttgart, DE;
Raymond C. Yeung, Round Rock, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A system for performing floating point arithmetic operations including a plurality of stages making up a pipeline, the stages including a first stage and a last stage. The system also includes a register file adapted for receiving a store instruction for input to the pipeline, where the data associated with the store instruction is dependent on a previous operation still in the pipeline. The system further includes a store register adapted for outputting the data associated with the store instruction to memory and a control unit having instructions. The instructions are directed to inputting the store instruction into the pipeline and to providing a path for forwarding the data associated with the store instruction from the last stage in the pipeline to the store register for use by the store instruction if the previous operation immediately precedes the store operation in the pipeline and if there is a data type match between the store instruction and the previous operation. In addition, the instructions are directed to inputting the store instruction into the pipeline and to providing a path for forwarding the data associated with the store instruction from the first stage in the pipeline to the store register for use by the store instruction if the previous operation precedes the store operation by one or more stage in the pipeline and if there is a data type match between the store instruction and the previous operation.