Re: [eigen] SSE square root

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To: eigen@xxxxxxxxxxxxxxxxxxx
Subject: Re: [eigen] SSE square root
From: Cyril Flaig <cflaig@xxxxxxxxxxx>
Date: Fri, 27 Mar 2009 10:24:29 +0100

Rohit Garg wrote:
> This file has my sse float implementation for square root. The SSE
> square root instruction has only 12 bits of precision so extra
> iterations of Newton Raphson may be neccessary. How many of the are
> neccessary...

The newton iteration doubles the number of correct bits (quadratic
convergent). You will have 24 correct bits.

Regards

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References:
- [eigen] SSE square root
  - From: Rohit Garg

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