Use of C99 extra long double math functions after r236148

[Stephen Montgomery-Smith]

On 07/18/2012 05:42 PM, Peter Jeremy wrote:
> On 2012-Jul-18 10:07:41 -0500, Stephen Montgomery-Smith <stephen at missouri.edu> wrote:
>> I went on a long road trip yesterday, so I didn't get any code written,
>> but I did have a lot of thoughts about clog and casinh.
>
> Can I suggest you have a read through "Implementing the Complex
> Arcsine and Arccosine Functions Using Exception Handling" by
> T. E. Hull Thomas F. Fairgrieve and Ping Tak Peter Tang, ACM
> Transactions on Mathematical Software, Vol. 23, No. 3, September 1997.
> Based on a quick skim, it includes fairly detailed pseudocode,
> together with an error analysis.

The other option - if you want to write the casinh, etc functions, 
following this paper, I would be happy to bow out.  I feel that what I 
learned about casinh as a mathematical function in the last few days has 
been worth my time, even if it doesn't end up being used.