asech

auto eve::asech = functor<asech_t>

inlineconstexpr

Header file

#include <eve/module/math.hpp>

Callable Signatures

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

Parameters

• x: floating value.
• c: Conditional expression masking the operation.
• m: Logical value masking the operation.

Return value

1. Returns the elementwise inverse hyperbolic secant of the input in the range \([-\frac\pi2, \frac\pi2]\). In particular:
   • If the element is \(\pm0\), \(\pm\infty\) is returned.
   • If the element is \(1\), \(+0\) returned.
   • If the element does not belong to \([0,1]\), NaN is returned.
2. The operation is performed conditionnaly.

External references

• Wolfram MathWorld: Inverse Hyperbolic Secant
• Wikipedia: Inverse hyperbolic functions
• DLMF

Example

// revision 1
#include <eve/module/math.hpp>
#include <iostream>
 
int main()
{
  eve::wide wf = {1.0f, 0.1f, 0.0f, 0.5f};
 
  std::cout << "<- wf                       = " << wf << "\n";
 
  std::cout << "-> asech(wf)                = " << eve::asech(wf) << "\n";
  std::cout << "-> asech[ignore_last(2)](wf)= " << eve::asech[eve::ignore_last(2)](wf) << "\n";
  std::cout << "-> asech[wf != 0.5f](wf)    = " << eve::asech[wf != 0.5f](wf) << "\n";
}