DIGITAL PROCESSOR HAVING INSTRUCTION SET WITH COMPLEX EXPONENTIAL NON-LINEAR FUNCTION

Title:

DIGITAL PROCESSOR HAVING INSTRUCTION SET WITH COMPLEX EXPONENTIAL NON-LINEAR FUNCTION

Document Type and Number:

WIPO Patent Application WO/2013/063447

Kind Code:

A3

Abstract:

A digital processor is provided having an instruction set with a complex exponential function. The digital processor evaluates a complex exponential function for an input value, x, by obtaining a complex exponential software instruction having the input value, x, as an input; and in response to the complex exponential software instruction: invoking at least one complex exponential functional unit that implements complex exponential software instructions to apply the complex exponential function to the input value, x; and generating an output corresponding to the complex exponential of the input value, x. A complex exponential function for an input value, x, can be evaluated by wrapping the input value to maintain a given range; computing a coarse approximation angle using a look-up table; scaling the coarse approximation angle to obtain an angle from 0 to θ; and computing a fine corrective value using a polynomial approximation.

Inventors:

AZADET KAMERAN (US)
MOLINA ALBERT (ES)
OTHMER JOSEPH H (US)
VENKATARAGHAVAN PARAKALAN (IN)
YU MENG-LIN (US)
WILLIAMS JOSEPH (US)

Application Number:

PCT/US2012/062191

Publication Date:

June 20, 2013

Filing Date:

October 26, 2012

Export Citation:

Click for automatic bibliography generation Help

Assignee:

LSI CORP (US)
AZADET KAMERAN (US)
MOLINA ALBERT (ES)
OTHMER JOSEPH H (US)
VENKATARAGHAVAN PARAKALAN (IN)
YU MENG-LIN (US)
WILLIAMS JOSEPH (US)

International Classes:

G06F9/06; G06F9/30; G06F9/44

Foreign References:

US20110055303A1	2011-03-03
US6151682A	2000-11-21
US6446193B1	2002-09-03
US7441105B1	2008-10-21

Other References: