reldist

eve::reldist = functor<reldist_t>

inlineconstexpr

Header file

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
   // Regular overloads
   constexpr auto reldist(floating_value auto x, floating_value auto y)                          noexcept; // 1
 
   // Lanes masking
   constexpr auto reldist[conditional_expr auto c](floating_value auto x, floating_value auto y) noexcept; // 2
   constexpr auto reldist[logical_value auto m](floating_value auto x, floating_value auto y)    noexcept; // 2
 
   // Semantic options
   constexpr auto reldist[pedantic](floating_value auto x, floating_value auto y)                noexcept; // 4
}

Parameters

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

Return value

1. The value of the relative distance of the arguments is returned, i.e. eve::abs(x-y)/max(abs(x), abs(y), 1).
2. The operation is performed conditionnaly.
3. reldist[pedantic](x, y) computes a distance wich is NaN if and only if one of the parameters is NaN.

Example

// revision 0
#include <eve/module/core.hpp>
#include <iostream>
 
int main()
{
  eve::wide wf0{0.0, 1.0, 2.0, 3.0, -1.0, -2.0, -3.0, -4.0};
  eve::wide wf1{0.0, -4.0, 1.0, -1.0, 2.0, -2.0, 3.0, -3.0};
 
  std::cout << "<- wf0                               = " << wf0 << "\n";
  std::cout << "<- wf1                               = " << wf1 << "\n";
                                                     
  std::cout << "-> reldist(wf0, wf1)                 = " << eve::reldist(wf0, wf1) << "\n";
  std::cout << "-> reldist[ignore_last(2)](wf0, wf1) = " << eve::reldist[eve::ignore_last(2)](wf0, wf1) << "\n";
  std::cout << "-> reldist[wf0 != 0](wf0, wf1)       = " << eve::reldist[wf0 != 0](wf0, wf1) << "\n";
  std::cout << "-> reldist[pedantic](wf0, wf1)       = " << eve::reldist[eve::pedantic](wf0, wf1) << "\n";
}