veltkamp

auto eve::veltkamp = functor<veltkamp_t>

inlineconstexpr

Example

// revision 0
#include <eve/module/core.hpp>
#include <iostream>
#include <iomanip>
 
int main()
{
  eve::wide wf = {1.0, 0.1, 3.14159265358979, 1.0e10};
 
  std::cout << std::setprecision(20);
  std::cout << "<- wf            = " << wf << "\n";
  std::cout << "-> veltkamp(wf)  = " << eve::veltkamp(wf) << "\n";
 
  auto [xh, xl] = eve::veltkamp(wf);
  std::cout << "   xh            = " << xh << "\n";
  std::cout << "   xl            = " << xl << "\n";
  std::cout << "   xh + xl       = " << xh + xl << "\n";
}

Header file

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
   template<eve::floating_value T, eve::floating_value U  >
   constexpr kumi::tuple<T, T> veltkamp(T x) noexcept;
}

Parameters

• x : argument.

Return value

Computes elementwise a pair of values [xh, xl] such that:

• 'xh+xl' is 'x', but each has much less significant digits.

External references

• HAL: On various ways to split a floating-point number