ellint_rc

eve::ellint_rc = functor<ellint_rc_t>

inlineconstexpr

Header file

#include <eve/module/elliptic.hpp>

Callable Signatures

namespace eve
{
   // Regular overload
   constexpr auto ellint_1(floating_value auto x, floating_value auto y)                          noexcept; // 1
 
   // Lanes masking
   constexpr auto ellint_1[conditional_expr auto c](floating_value auto x, floating_value auto y) noexcept; // 2
   constexpr auto ellint_1[logical_value auto m](floating_value auto x, floating_value auto y)    noexcept; // 2
}

Parameters

• x, y: floating valuess. x and y must be strictly positive and y non zero or the result is NaN.
• c: Conditional expression masking the operation.
• m: Logical value masking the operation.

Return value

1. the value of the Carlson degenerate elliptic integral: $\mathbf{R}_\mathbf{C}(x, y) = \frac12 \int_{0}^{\infty} \scriptstyle(t+x)^{-1/2}(t+y)^{-1}\scriptstyle\;\mathrm{d}t$ is returned.
2. The operation is performed conditionnaly

External references

• DLMF: Elliptic Integrals
• Wolfram MathWorld: Elliptic Integral

Example

// revision 1
#include <eve/module/elliptic.hpp>
#include <iostream>
 
eve::wide pf{1.0f, 0.0f, 1.5f, 3.0f};
eve::wide qf{1.0f, 4.0f, 0.2f, 0.5f};
 
int main()
{
  std::cout << "<- pf = " << pf << "\n";
  std::cout << "<- qf = " << qf << "\n";
 
  std::cout << "-> ellint_rc(pf, qf)                = " << eve::ellint_rc(pf, qf) << "\n";
  std::cout << "-> ellint_rc[ignore_last(2)](pf, qf)= " << eve::ellint_rc[eve::ignore_last(2)](pf, qf) << "\n";
  std::cout << "-> ellint_rc[qf != 4.0f](pf, qf)    = " << eve::ellint_rc[qf != 4.0f](pf, qf) << "\n";
}