Patent ID: 7912883
Filing Date: 2011-03-22
Classification: G06F

Abstract:
1. An exponent processing method executed by a tangible processor for evaluating a base 2 exponential function 2 x , where 2 x =2 I ×2 y , where 2 I corresponds to an integer component, where 2 y corresponds to a fractional component, where 2 y =2 y0 ×2 y1 ×2 y2 , and where 2 y0 , 2 y1 , and 2 y2 correspond to first, second, and third component parts, respectively, of the fractional component, the method comprising: performing a first table lookup by the processor using a first address to provide a first value corresponding to the first component part; setting an integer exponent by the processor to provide an integer-based value corresponding to the integer component; performing a second table lookup by the processor using a second and third address to provide a second value and a third value corresponding to the second component part and the third component part, respectively; expanding and normalizing the second and third values to provide expanded and normalized second and third values; combining the expanded and normalized second and third values to produce a first product; and computing the exponential function by the processor by combining the first value, the integer-based value, and the first product.