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From: mitchalsup@aol.com (MitchAlsup1)
Newsgroups: comp.arch
Subject: Re: Continuations
Date: Tue, 23 Jul 2024 15:14:44 +0000
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On Mon, 22 Jul 2024 15:50:10 +0000, Michael S wrote:

> On Mon, 22 Jul 2024 15:01:10 +0000
> mitchalsup@aol.com (MitchAlsup1) wrote:
>
>> There are certain N-R iterations that can be expressed with both::
>>
>>      NR+1 = F( NR,  SQRT() )
>> and
>>      NR+1 = F'(NR, RSQRT() )
>>
>> Typically the one with RSQRT() converges slightly faster than the
>> one using SQRT(). How much is slightly::maybe ½-1 more bit per
>> iteration.
>
> As I said above, I am not aware of the NR iterations for SQRT() that
> consist of fmul, fadd and nothing else.
> If you know one, please tell me.

A am NOT talking about a NR iteration for SQRT() these can be dome with
bit twiddling and multiplication.

I am     talking about a NR iteration that uses SQRT() in the
calculation
of some other <harder> elementary function.