Accuracy of Mathematical Functions in Single, Double, and Quadruple Precision

[Paul Zimmermann]

       Dear Joseph,

> Thanks.  The errors above 9ulps that you found for tgamma and lgamma for 
> binary128 would be good to mention in the bugs you opened for those 
> functions for double, as they're evidence improvements are needed for 
> those functions for binary128 as well.

done. I found an error of 11.8884 ulps for lgamma, and 10.1539 ulps for tgamma.

Paul