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Re: Porposal: Floating-Point Options

From: Marcin Dalecki <martin at dalecki dot de>
To: Russell Shaw <rjshaw at netspace dot net dot au>
Cc: gcc at gcc dot gnu dot org
Date: Wed, 15 Jun 2005 00:55:07 +0200
Subject: Re: Porposal: Floating-Point Options
References: <42AEEA99.70408@coyotegulch.com> <42AEEF45.2070805@adacore.com> <42AF13F1.9000600@netspace.net.au>

On 2005-06-14, at 19:29, Russell Shaw wrote:

The original bug was about testing the equality of doubles. I think that's just plain mathematically bad. Error bands should be used to test for "equality", using a band that is in accordance with the minimum precision specified in the compiler documentation.

To be a bit more precise: don't use the precision specified in the compiler but the precision you expect for the overall algorithms numerical stability.

References:
- Porposal: Floating-Point Options
  - From: Scott Robert Ladd
- Re: Porposal: Floating-Point Options
  - From: Robert Dewar
- Re: Porposal: Floating-Point Options
  - From: Russell Shaw

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