https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66689
Bug ID: 66689
Summary: comp_ellint_3 and ellint_3 return garbage values
Product: gcc
Version: 5.1.0
Status: UNCONFIRMED
Severity: critical
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: john at johnmaddock dot co.uk
Target Milestone: ---
The std::tr1 functions comp_ellint_3 and ellint_3 appear to return garbage
values whenever the nu parameter is non zero.
For example:
comp_ellint_3(0.75, 0) returns 1.91099 which is correct, but
comp_ellint_3(0.75, 0.5) returns 1.52852 when it should be 2.80011 (see for
example http://www.wolframalpha.com/input/?i=EllipticPi[0.5%2C+0.75^2] but note
different parameterization on the wolfram site)
Similar errors occur with ellint_3 rendering these functions essentially
useless as far as I can see?
