E.V.E
v2022.09.01

◆ 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;
}
constexpr callable_is_even_ is_even
Returns a logical true if and only if the element value is even.
Definition: is_even.hpp:64
Definition: all_of.hpp:22

Parameters

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);
Definition: value.hpp:83
Definition: value.hpp:42
constexpr callable_is_flint_ is_flint
Returns a logical true if and only if the element value is a floating value representing an integer.
Definition: is_flint.hpp:66
constexpr callable_is_equal_ is_equal
Returns a logical true if and only if the element value are equal.
Definition: is_equal.hpp:96

Example

#include <eve/module/core.hpp>
#include <eve/wide.hpp>
#include <iostream>
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;
}
Wrapper for SIMD registers.
Definition: wide.hpp:65

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>
    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;
    }