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Message-ID: <20120314190123.GH5728@port70.net>
Date: Wed, 14 Mar 2012 20:01:23 +0100
From: Szabolcs Nagy <nsz@...t70.net>
To: musl@...ts.openwall.com
Subject: Re: correctly rounded sqrt
* Szabolcs Nagy <nsz@...t70.net> [2012-03-14 17:56:05 +0100]:
> i tried to solve the sqrt issue with a wrapper
> as discussed on irc, but i couldn't find a nice
> solution
>
i did some benchmarks:
(1x == single sqrt instruction)
wrapped sqrt is about 3.5x
the fdlibm software sqrt is about 10x
fp precision setting is about 1.2x
it might be possible to do a bit better wrapping
but not much better, so fp prec setting wins if
that's feasible..
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