is_even

eve::is_even = {}

inlineconstexpr

Returns a logical true if and only if the element value is even.

Defined in Header

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
   template< eve::value T >
   eve::as_logical<T> is_even(T x) noexcept;
}

Parameters

• x : argument.

Return value

The call is_even(x) is semantically equivalent to:

if constexpr(floating_value<T>)   return eve::is_flint (x) && eve::is_flint (x/2);
else constexpr(integral_value<T>) return eve::is_equal (x, (x/2)*2);

Example

#include <eve/module/core.hpp>
#include <eve/wide.hpp>
#include <iostream>
 
using wide_ft = eve::wide<float, eve::fixed<4>>;
 
int main()
{
  wide_ft pf = {0.0f, 1.0f, -1.5f, -2.0f};
 
  std::cout << "---- simd" << '\n'
            << "<- pf          = " << pf << '\n'
            << "-> is_even[pf > 0](pf) = " << eve::is_even[pf > 0](pf) << '\n';
 
  float xf = 1.0f;
 
  std::cout << "---- scalar" << '\n'
            << "<- xf          = " << xf << '\n'
            << "-> is_even(xf) = " << eve::is_even(xf) << '\n';
  return 0;
}

Semantic Modifiers

• Masked Call

  The call eve;is_even[mask](x) provides a masked version of eve::is_even which is equivalent to if_else (mask, is_even(x), eve::false( eve::as(x))).

  Example

  #include <eve/module/core.hpp>
  #include <eve/wide.hpp>
  #include <iostream>
   
  using wide_ft = eve::wide<float, eve::fixed<4>>;
   
  int main()
  {
    wide_ft pf = {0.0f, 1.0f, -1.5f, -2.0f};
   
    std::cout << "---- simd" << '\n'
              << "<- pf          = " << pf << '\n'
              << "-> is_even[pf > 0](pf) = " << eve::is_even[pf > 0](pf) << '\n';
    return 0;
  }