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. 13, 2001
Filed:
Feb. 24, 1998
Applicant:
Inventor:
Roger Alan Smith, Austin, TX (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 7/52 ; G06F 7/72 ; G06F 9/302 ;
U.S. Cl.
CPC ...
G06F 7/52 ; G06F 7/72 ; G06F 9/302 ;
Abstract
Two related extended precision operand formats provide for efficient multiply/accumulate operations in a SIMD data processing system. Each format utilizes a group of “b” bit elements in a vector register. Each of the elements provides “m” bits of precision, with b>m. The remaining b−m bits in each element accumulate overflows and carries across multiple additions and subtractions. Existing SIMD multiply-sum instructions can be used to efficiently take input operands from the first format and produce output results in the second extended precision format when b,=2b,and m,=2m,.