fast_two_add

eve::fast_two_add = functor<fast_two_add_t>

inlineconstexpr

Defined in Header

#include <eve/module/core.hpp>

Callable Signatures

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

Parameters

• x : argument.

Return value

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

• a is x+y
• e is a value such that a $\oplus$e is equal to x $\oplus$y

where $\oplus$ adds its two parameters with infinite precision.

Warning

the algoritm needs |x| >= |y|, and will assert if the condition is not met

Example

// revision 1
#include <eve/module/core.hpp>
#include <iostream>
 
int main()
{
  eve::wide wf0 = {30.0, 2.5, -32.7, 1.0};
  eve::wide wf1 = {4.2, 1.5, -10.834, eve::eps(eve::as<double>())/2};
 
  std::cout << "<- wf0               = " << wf0 << "\n";
  std::cout << "<- wf1               = " << wf1 << "\n";
 
  std::cout << "-> fast_two_add(wf0, wf1) = " << eve::fast_two_add(wf0, wf1) << "\n";
}