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10,201 Views
Registered: ‎10-14-2012

How to solve cube-root problem using IP core

How to solve cube-root  problem using IP core?

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4 Replies
Xilinx Employee
Xilinx Employee
10,191 Views
Registered: ‎02-06-2013

Re: How to solve cube-root problem using IP core

Hi

 

Which core are you referring here?

 

 

Regards,

Satish

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10,180 Views
Registered: ‎10-14-2012

Re: How to solve cube-root problem using IP core

Those in "CORE Generator"->"Math Functions"

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Xilinx Employee
Xilinx Employee
10,175 Views
Registered: ‎02-06-2013

Re: How to solve cube-root problem using IP core

Hi

 

We have cores which can do Square root functions only using cordic or Floating point cores and no cores to do the cube root.

Regards,

Satish

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Contributor
Contributor
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Registered: ‎10-18-2018

Re: How to solve cube-root problem using IP core

Dear @atreide_lawson

We can solve the cuberoot problem with using the basic ADD, DIVIDE and SQUARE IPs available in the IP Catalog.

Consider for instance, that you want to find a cuberoot of a number C. Then, use the following equation Iteratively for say 20-50 Iterations and a fairly acceptable value can be computed.

X_(n+1) = (1/3) * [2*X_(n) + (C/(X_(n)^2))]                                        ---[1]

Here X_(n) is the initial guess of the cuberoot. For more information see the following paper:

Paper Link

 

Below is a simple MatLab Code for computing 3^1/3.

clear all;
c=3;
z=1.01;
for i=1:100
    z = (1/3)*((2*z) + (c/(z^2)));
end
z;
Best Regards,
Urvish