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Re: asserting the equality of double values

From: Kamaraju S Kusumanchi
Subject: Re: asserting the equality of double values
Date: Mon, 17 Sep 2007 22:44:14 -0400
User-agent: KNode/0.10.5

Kevin Ryde wrote:

> "Nelson H. F. Beebe" <address@hidden> writes:
>> Subtracting one produces a significant of all
>> 1-bits:  2**53 - 1 = +0x1.fffffffffffffp+52,
> Yes.
>> and that is the
>> next-to-largest exactly representable whole number in this arithmetic
>> system.  Its floor is identical, so "x == floor()" is true.
> Well, it's supposed to be.  I think I put in that test.  If it's failing
> on alpha someone will want to dig around and see how it went wrong.  It
> ought to be pretty simple, all the values are integers, so no rounding
> at all (and it hasn't even reached the actual scm_c_round).

For the record, I have reported this bug to the Debian maintainers of glibc .


Kamaraju S Kusumanchi

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