Path: news.mathworks.com!newsfeed-00.mathworks.com!newscon02.news.prodigy.net!prodigy.net!nx01.iad01.newshosting.com!newshosting.com!216.196.98.140.MISMATCH!border1.nntp.dca.giganews.com!nntp.giganews.com!local01.nntp.dca.giganews.com!nntp.rcn.net!news.rcn.net.POSTED!not-for-mail
NNTP-Posting-Date: Wed, 04 Jul 2007 11:02:34 -0500
Date: Wed, 04 Jul 2007 12:02:33 -0400
From: Jerry Avins <jya@ieee.org>
Reply-To:  jya@ieee.org
Organization: The Hectic Eclectic
User-Agent: Thunderbird 2.0.0.4 (Windows/20070604)
MIME-Version: 1.0
Newsgroups: comp.soft-sys.matlab,comp.dsp
Subject: Re: Seeking numerical package for quadruple precision...
References: <f6etbs$2of$1@news.Stanford.EDU> <%KOii.45179$5j1.11252@newssvr21.news.prodigy.net>
In-Reply-To: <%KOii.45179$5j1.11252@newssvr21.news.prodigy.net>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
Message-ID: <FqWdnS7AcokHWRbbnZ2dnUVZ_gGdnZ2d@rcn.net>
Lines: 31
X-Usenet-Provider: http://www.giganews.com
NNTP-Posting-Host: 207.38.184.56
X-Trace: sv3-Gr8vCCvLnsRLO6jVAOTMaN3ZGWqOEMHpz4Ln0VdfdAkP5jOAk4CXAKq81KezmOYyJ+p+FYn30nJz40J!27hRMmjBFaEohuQayWvXjw5XPkCqOEQZJWblmPdeMGzZ3ycAr9/O0sre8WBclLq17aUlojuif+D6!XA==
X-Complaints-To: abuse@rcn.net
X-DMCA-Complaints-To: abuse@rcn.net
X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers
X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly
X-Postfilter: 1.3.35
Bytes: 2721
Xref: news.mathworks.com comp.soft-sys.matlab:417222 comp.dsp:224990


Vladimir Vassilevsky wrote:
> 
> 
> Vista wrote:
> 
>> I have some computation and simulation which need quadruple precision.  I
>> mean, the double precision is not enough, while high precision such as 
>> 1000 digits is not needed, and that's too slow.  I guess quadruple 
>> precision
>> exactly fits my problem and should be much faster than double precision.
> 
> MIRACL
> 
>> Moreover, are there popular quadruple precision packages? Please 
>> recommend the fastest one. I am really in huge need of speed.
> 
> And what is the problem to develop such a basic thing yourself?

I drove someone's assertive grandmother on an errand, and she screamed 
when I turned left off the road, "There's a car coming!" I answered that 
the car would pass well behind us (which it did) and she asked 
indignantly how I could know that. I told her that knowing it was part 
of being a competent driver. She answered, again indignantly, "Well, I 
didn't know it" to which I answered, "That's an easy syllogism. Draw 
your own conclusion." Vista seems to believe that quad precision is 
"much faster" than double precision. What conclusion are we to draw?

Jerry
-- 
Engineering is the art of making what you want from things you can get.
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯