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:
Sep. 08, 2015
Filed:
Jan. 30, 2009
Kameran Azadet, Morganville, NJ (US);
Jian-guo Chen, Basking Ridge, NJ (US);
Samer Hijazi, Bethlehem, PA (US);
Joseph Williams, Holmdel, NJ (US);
Kameran Azadet, Morganville, NJ (US);
Jian-Guo Chen, Basking Ridge, NJ (US);
Samer Hijazi, Bethlehem, PA (US);
Joseph Williams, Holmdel, NJ (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
A digital signal processor is provided having an instruction set with an exponential function that uses a reduced look-up table. The disclosed digital signal processor evaluates an exponential function for an input value, x, by decomposing the input value, x, to an integer part, N, a first fractional part, q, larger than a specified value, x, and a second fractional part, q, smaller than the specified value, x; computing 2using a polynomial approximation, such as a cubic approximation; obtaining 2from a look-up table; and evaluating the exponential function for the input value, x, by multiplying 2, 2and 2together. Look-up table entries have a fewer number of bits than a number of bits in the input value, x.