From: Szabolcs Nagy <nsz@port70.net>
To: musl@lists.openwall.com
Subject: Re: correctly rounded sqrt
Date: Wed, 14 Mar 2012 20:01:23 +0100 [thread overview]
Message-ID: <20120314190123.GH5728@port70.net> (raw)
In-Reply-To: <20120314165604.GF5728@port70.net>
* Szabolcs Nagy <nsz@port70.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..
next prev parent reply other threads:[~2012-03-14 19:01 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-14 16:56 Szabolcs Nagy
2012-03-14 16:57 ` Szabolcs Nagy
2012-03-14 19:01 ` Szabolcs Nagy [this message]
2012-03-15 1:46 ` Szabolcs Nagy
2012-03-15 3:23 ` Szabolcs Nagy
2012-03-15 5:07 ` Rich Felker
2012-03-15 5:30 ` Szabolcs Nagy
2012-03-15 8:02 ` Szabolcs Nagy
2012-03-15 16:12 ` Rich Felker
2012-03-15 18:14 ` Pascal Cuoq
2012-03-15 18:22 ` Szabolcs Nagy
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