Re: Floating Point Enigma - Please Solve

From	Fabian Russell <root@localhost.localdomain>
Newsgroups	sci.physics
Subject	Re: Floating Point Enigma - Please Solve
Date	2015-11-13 21:14 +0000
Organization	NewsGuy - Unlimited Usenet $23.95
Message-ID	<pan.2015.11.13.21.14.16@localhost.localdomain> (permalink)
References	<pan.2015.11.13.19.43.38@localhost.localdomain>

Show all headers | View raw

On Fri, 13 Nov 2015 19:43:32 +0000, Fabian Russell wrote:

> 
> To all those wise-ass dumb-fscks who adamantly claim that a knowledge
> of floating point operations is superfluous, this one is for youse (you all).
> 

In a million billion years, none of the physics "experts" on this
group will be able to solve this EASY EASY EASY problem.

Therefore, I will reveal the SIMPLE SIMPLE SIMPLE answer.

Using the fast-math option for speed, which ALL compilers will provide,
has the result of disabling DENORMAL floating point numbers and
invoking the FLUSH-TO-ZERO option.

What is a denormal floating point?  If you don't already know (and you
should know), then look it up.  I don't have the time to explain.

Denormal FP's are a part of the IEEE754 standard and without them
a relatively large gap, or interval, is created around zero.  Within
this gap, every non-zero representable quantity becomes equal
to zero. 

Without denormals, any algorithm that produces a small non-zero
numerical value will have that value automatically "flushed" to zero
by the FP processor.  As a consequence, divide-by-zero exceptions
can occur, and depending on the nature of the algorithm they can
occur frequently.

Aside: this is but one example of some of the many problems
that could arise.

Ha, ha, ha, ha, ha, ha!  The seasoned "experts" on this group,
when it comes to modern computational physics, are like blind
men stumbling around with their white canes and sunglasses.

Now go back to your smart phones, YouTube, and physorg,org
and pretend to be enlightened.

Ha, ha, ha, ha, ha, ha, ha, ha!

Thread

Floating Point Enigma - Please Solve Fabian Russell <root@localhost.localdomain> - 2015-11-13 19:43 +0000
  Re: Floating Point Enigma - Please Solve jimp@specsol.spam.sux.com - 2015-11-13 19:59 +0000
    Re: Floating Point Enigma - Please Solve Fabian Russell <root@localhost.localdomain> - 2015-11-13 20:16 +0000
      Re: Floating Point Enigma - Please Solve jimp@specsol.spam.sux.com - 2015-11-13 21:02 +0000
        Re: Floating Point Enigma - Please Solve Fabian Russell <root@localhost.localdomain> - 2015-11-13 22:32 +0000
          Re: Floating Point Enigma - Please Solve jimp@specsol.spam.sux.com - 2015-11-13 23:32 +0000
            Re: Floating Point Enigma - Please Solve Fabian Russell <root@localhost.localdomain> - 2015-11-13 23:52 +0000
              Re: Floating Point Enigma - Please Solve jimp@specsol.spam.sux.com - 2015-11-14 00:06 +0000
  Re: Floating Point Enigma - Please Solve Fabian Russell <root@localhost.localdomain> - 2015-11-13 21:14 +0000
    Re: Floating Point Enigma - Please Solve noTthaTguY <abu.kuanysh05@gmail.com> - 2015-11-13 13:18 -0800
    Re: Floating Point Enigma - Please Solve jimp@specsol.spam.sux.com - 2015-11-13 23:33 +0000
  Re: Floating Point Enigma - Please Solve Double-A <double-a3@hush.com> - 2015-11-13 13:33 -0800
    Re: Floating Point Enigma - Please Solve Fabian Russell <root@localhost.localdomain> - 2015-11-13 22:04 +0000
      Re: Floating Point Enigma - Please Solve jimp@specsol.spam.sux.com - 2015-11-13 23:35 +0000
        Re: Floating Point Enigma - Please Solve Fabian Russell <root@localhost.localdomain> - 2015-11-13 23:54 +0000
          Re: Floating Point Enigma - Please Solve jimp@specsol.spam.sux.com - 2015-11-14 00:15 +0000
  Re: IEEE754 compliance is the _default_. Fabian Russell <root@localhost.localdomain> - 2015-11-14 02:08 +0000
    Re: IEEE754 compliance is the _default_. GreyCloud <cumulus@mist.com> - 2015-11-13 19:30 -0700

csiph-web