E.V.E
v2023.02.15

◆ is_pow2

eve::is_pow2 = {}
inlineconstexpr

Returns a logical true if and only if the element value is a power of 2.

Defined in Header

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
template< eve::value T >
eve::as_logical<T> is_pow2(T x) noexcept;
}
constexpr callable_is_pow2_ is_pow2
Returns a logical true if and only if the element value is a power of 2.
Definition: is_pow2.hpp:61
Definition: abi.hpp:18

Parameters

Return value

Checks elementwise if x is an integral power of two.

Example

#include <eve/module/core.hpp>
#include <eve/wide.hpp>
#include <iostream>
int main()
{
wide_it pi = {14, 1, 3, 0, 16, 23000, 0, 27};
std::cout << "---- simd" << '\n'
<< "<- pi = " << pi << '\n'
<< "-> is_pow2(pi) = " << eve::is_pow2(pi) << '\n';
std::uint32_t xf = 48;
std::cout << "---- scalar" << '\n'
<< "<- xf = " << xf << '\n'
<< "-> is_pow2(xf) = " << eve::is_pow2(xf) << '\n';
return 0;
}
constexpr callable_pi_ pi
Callable object computing the constant .
Definition: pi.hpp:49
Wrapper for SIMD registers.
Definition: wide.hpp:65

Semantic Modifiers

  • Masked Call

    The call eve;is_pow2[mask](x) provides a masked version of eve::is_pow2 which is equivalent to if_else (mask, is_pow2(x), eve::false( eve::as(x))).

    Example

    #include <eve/module/core.hpp>
    #include <eve/wide.hpp>
    #include <iostream>
    int main()
    {
    wide_it pi = {14, 1, 3, 0, 16, 23000, 0, 27};
    std::cout << "---- simd" << '\n'
    << "<- pi = " << pi << '\n'
    << "-> is_pow2[pi < 10](pi) = " << eve::is_pow2[pi < 10](pi) << '\n';
    return 0;
    }