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Re: [oc] "1/x" function

To: cores@opencores.org
Subject: Re: [oc] "1/x" function
From: Joachim Strömbergson<Joachim.Strombergson@InformAsic.com>
Date: Mon, 09 Dec 2002 10:35:29 +0100
References: <1039348684.12160.16.camel@linux8k>
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Aloha!

Rudolf Usselmann wrote:
> Anybody have an efficient algorithm for a "1/x" function for
> hardware implementations ? Or any pointer to white papers, etc ?
> I need something that is fast and small, and can be pipelined.

I recommend Parhamis book "Computer Arithmetic", see for example chapter 16.5 
about HW-implementation of convergence division algorithms. Both pipeline 
estimation and LUT-size estimation.

Some other person mentioned Reto Zimmermann. He has some great info, albeit 
possibly not very helpful for this problem.

BTW: How about CORDICs? Shouldn't they be useful for this, at least as an 
approximation?

-- 
Med vänlig hälsning, Yours

Joachim Strömbergson - Alltid i harmonisk svängning.
VP, Research & Development
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References:
- [oc] "1/x" function
  - From: Rudolf Usselmann <rudi@asics.ws>

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