E.V.E  0.1-beta

◆ popcount

eve::popcount = {}
inlineconstexpr

Callable object computing the number of bits set.

Required header: #include <eve/function/popcount.hpp>

Members Functions

Member Effect
operator() the computation of the number of bits set

auto operator()(value auto x) const noexcept;
Definition: value.hpp:31

Parameters

x: unsigned value.

Return value

Returns the number of bit set in each element of the parameter.


Supported decorators

no decorators are supported

Example

See it live on Compiler Explorer

#include <eve/function/popcount.hpp>
#include <eve/constant/inf.hpp>
#include <eve/wide.hpp>
#include <iostream>
int main()
{
wide_it pi = {14, 1, 3, 0};
std::cout << "---- simd" << '\n'
<< "<- pi = " << pi << '\n'
<< "-> popcount(pi) = " << eve::popcount(pi) << '\n';
std::uint32_t xf = 48;
std::cout << "---- scalar" << '\n'
<< "<- xf = " << xf << '\n'
<< "-> popcount(xf) = " << eve::popcount(xf) << '\n';
return 0;
}
constexpr callable_popcount_ popcount
Callable object computing the number of bits set.
Definition: popcount.hpp:54
constexpr callable_pi_ pi
Callable object computing the value.
Definition: pi.hpp:54
Wrapper for SIMD registers.
Definition: wide.hpp:65