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Date: Wed, 29 Aug 2007 10:35:16 -0700
From: Brian Dessent <brian@dessent.net>
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Subject: Re: 1.5.24: sin() bug
References: <20070829153331.GA95558@tetsuo.karasik.eu.org> <46D5A79E.C09EF7CE@dessent.net> <003201c7ea5f$d01db8f0$2e08a8c0@CAM.ARTIMI.COM> <46D5AD5A.B110DBB6@dessent.net>
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Brian Dessent wrote:

> >   Since when was pi less than 2^-27?
> 
> This is a kernel sin, a function over the limited range [-pi/4, pi/4],
> where the general case sin is reduced to kernel sin by the remainder of
> modulus pi/2.

And note that the testcase is not exactly pi, it's pi minus a very small
number:

        // M_PI    3.14159265358979323846
        double g = 3.1415926535897900074;

Brian

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